CN-121992934-A - Novel steel pipe system device with adjustable length

CN121992934ACN 121992934 ACN121992934 ACN 121992934ACN-121992934-A

Abstract

The invention relates to the technical field of constructional engineering, in particular to a novel steel pipe system device with adjustable length, which comprises an outer sleeve, an inner steel pipe, positioning screw holes and bolt components, wherein the outer sleeve and the inner steel pipe are made of the same material, the wall thickness is 3.0mm, the length of the outer sleeve is 1.2m or 1.5m, the outer diameter is larger than 51mm, the positioning screw holes are formed in the outer sleeve at intervals of 300mm in the axial direction, the inner steel pipe can be slidably arranged in the outer sleeve in a penetrating manner, and the two hole positions can be locked and fixed through the bolt components after being aligned accurately. According to the invention, the adaptation of different heights is realized by adjusting and fixing the extension length of the inner steel pipe, the steel pipe is not required to be cut, the template support frame, the sloping roof scaffold and other scenes are adapted, the device is simple and convenient to operate, quick to install, capable of being repeatedly recycled, capable of greatly reducing material loss and labor cost, and improving construction efficiency and safety, and has remarkable practical value.

Inventors

WANG CHENG
KONG FANBIN
CHEN YEQUAN
WANG PENG
WANG HONGHUA
Song Hengxuan
YU PENG
JI JINQIAO

Assignees

中建八局第四建设有限公司

Dates

Publication Date: 20260508
Application Date: 20251229

Claims (10)

1. The novel steel pipe system device with the adjustable length comprises an outer sleeve (1), an inner steel pipe (2), a positioning screw hole (3) and a bolt assembly (4), and is characterized in that the inner steel pipe (2) can axially slide to penetrate through the outer sleeve (1) to form a telescopic matching structure, the positioning screw hole (3) respectively penetrates through the side wall of the outer sleeve (1) and the side wall of the inner steel pipe (2), and the positioning screw holes (3) on the outer sleeve (1) and the inner steel pipe (2) can be correspondingly aligned at different relative positions; The bolt assembly (4) comprises a bolt and a matched nut which are mutually matched, the bolt assembly (4) is detachably arranged in the aligned positioning screw hole (3) in a penetrating mode, the relative fixation of the outer sleeve (1) and the inner steel tube (2) is realized through the locking fit of the bolt and the matched nut, the total device length is accurately adjusted through a formula L=L 1 +L 2 , L 1 is the total device length, L 2 is the effective working length of the outer sleeve (1), L 2 is the length of the inner steel tube (2) extending out of the outer sleeve (1), and L 2 ∈[0,L 2max ],L 2max is the maximum extending length of the inner steel tube (2) and is determined by the difference value between the length of the outer sleeve (1) and the length of the inner steel tube (2); Through adjusting the sliding travel of the inner steel pipe (2) in the outer sleeve (1), the two positioning screw holes (3) are aligned at the target position and fixed through the bolt assembly (4), so that the length of the whole steel pipe system device is adjusted, and the application scenes of different height demands such as a formwork support frame, a sloping roof scaffold and the like in building construction are adapted.
2. The novel length-adjustable steel pipe system device according to claim 1, wherein the outer sleeve (1) and the inner steel pipe (2) are made of the same high-strength steel material, the wall thicknesses of the outer sleeve and the inner steel pipe are uniformly set to be 3.0mm, the axial bearing capacity of the device meets the formula f=σ s ·a, wherein σ s is the yield strength of the high-strength steel, a is the effective bearing area of the cross section of the device, and D is the outer diameter of the outer sleeve (1) or the outer diameter of the inner steel pipe (2), t=3.0 mm is the wall thickness, the whole stress of the device is ensured to be uniform, and the requirements of bearing and deformation resistance in building construction are met; The outer diameter of the outer sleeve (1) is 51-60 mm, the gap between the inner diameter of the outer sleeve (1) and the outer diameter of the inner steel tube (2) meets the formula delta=D 1 -D 2 , wherein delta is a fit gap, D 1 is the inner diameter of the outer sleeve (1), D 2 is the outer diameter of the inner steel tube (2), delta epsilon [0.5mm,1mm ], and the gap ensures smooth sliding of the inner steel tube (2) in the outer sleeve (1) and avoids excessive shaking in the adjusting process.
3. The novel length-adjustable steel pipe system device according to claim 1, wherein the length of the outer sleeve (1) is 1.2m or 1.5m, the length of the inner steel pipe (2) is 0.8 m-3.0 m, and the length adjustment within the range of 0.8 m-4.5 m is realized through the combination of the outer sleeve (1) with the inner steel pipes (2) with different lengths, so that most scaffold height requirements in building construction are covered.
4. The novel steel pipe system device with the adjustable length according to claim 1 is characterized in that positioning screw holes (3) on the outer sleeve (1) are uniformly distributed along the axial direction of the outer sleeve, the center distance between every two adjacent positioning screw holes (3) is 300mm, the number of the positioning screw holes (3) is not less than 4, 2-4 groups of the positioning screw holes (3) on the inner steel pipe (2) are arranged, each group comprises 2 positioning screw holes (3) symmetrically arranged on two side walls of the inner steel pipe (2), and stability after the outer sleeve (1) is connected with the inner steel pipe (2) is guaranteed.
5. The novel length-adjustable steel pipe system device according to claim 1, wherein the bolts in the bolt assembly (4) are high-strength bolts with M12-M16 specifications, the length of the screw rods of the bolts is 8-12 mm larger than the sum of the wall thicknesses of the outer sleeve (1) and the inner steel pipe (2), the matched nuts are nylon lock nuts, and flat washers and spring washers are further arranged between the nuts and the outer wall of the outer sleeve (1), so that the anti-loose performance and the shock resistance of the connecting structure are further improved.
6. The novel length-adjustable steel pipe system device according to claim 1 is characterized in that round corner transition structures are arranged at two end ports of the outer sleeve (1), the round corner radius is 2 mm-3 mm, guide chamfers are arranged at the end parts of the insertion ends of the inner steel pipes (2), the chamfer angles are 30-45 degrees, the chamfer lengths are 5 mm-8 mm, the inner steel pipes (2) can be conveniently and rapidly inserted into the outer sleeve (1), and meanwhile sharp scratches of the ports are avoided for operators or construction materials.
7. The novel length-adjustable steel pipe system device according to claim 1, wherein an annular limiting protrusion (5) is integrally formed in the outer sleeve (1) near one end port of the outer sleeve, an annular limiting step (6) matched with the annular limiting protrusion (5) is arranged on the outer peripheral wall of the end part of the inner steel pipe (2) far away from the insertion end, and when the inner steel pipe (2) slides outwards to a limiting position, the annular limiting step (6) is abutted with the annular limiting protrusion (5) to form mechanical limiting, so that the inner steel pipe (2) is prevented from being completely separated from the outer sleeve (1).
8. The novel steel pipe system device with adjustable length according to claim 1, wherein the outer surfaces of the outer sleeve (1) and the inner steel pipe (2) are subjected to hot galvanizing corrosion prevention treatment, the thickness of a galvanized layer is 85-120 mu m, the inner wall of the positioning screw hole (3) is processed by adopting a galvanized tapping process, rust preventive oil soaking treatment is further carried out after tapping, the weather resistance and the corrosion resistance of the device are obviously improved, and the service life of the device in an outdoor construction environment is prolonged.
9. The novel steel pipe system device with the adjustable length according to claim 1 is characterized in that a distance mark and a serial number mark are arranged on the outer wall of the outer sleeve (1) corresponding to the position of each positioning screw hole (3), the distance mark marks the center distance of the adjacent positioning screw holes (3) by 300mm, the serial number marks are marked as 1, 2 and 3 from one end port of the outer sleeve (1), the position corresponding to each group of positioning screw holes (3) on the outer wall of the inner steel pipe (2) is marked with a group number mark of 1-1 and 1-2, the serial number mark of an operator can correspond to the group number mark of the inner steel pipe (2) through the serial number mark of the outer sleeve (1), the extending length of the inner steel pipe (2) can be rapidly determined, accurate alignment of the positioning screw holes (3) can be achieved without additional measurement, and the construction adjusting efficiency is further improved.
10. A novel length-adjustable steel pipe system device according to any one of claims 1 to 9, characterized in that the operation flow thereof comprises the following steps: step 1, construction preparation, namely selecting an outer sleeve (1), an inner steel pipe (2) and a bolt assembly (4) with corresponding specifications according to the target height requirement H of a template support frame or a sloping roof scaffold in building construction by combining a formula L=H, and checking that positioning screw holes (3) on the outer sleeve (1) and the inner steel pipe (2) are free from sundry blockage and bolts of the bolt assembly (4) are well matched with matched nuts; Step 2, preliminary assembly, in which an insertion end of the inner steel tube (2) with a guide chamfer slowly penetrates into the outer sleeve (1) along the axial direction of the outer sleeve (1), and the extending length L 2 of the inner steel tube (2) in the outer sleeve (1) is preliminarily adjusted according to the target height, so that L 2 ＜L 2max is ensured, and the limit range of the annular limit protrusion (5) is not exceeded by the inner steel tube (2); Step 3, aligning hole sites, namely positioning the serial number marks on the outer sleeve (1) and the group number marks on the inner steel pipe (2), or directly observing the hole sites, and finely adjusting the axial position of the inner steel pipe (2), so that any one positioning screw hole (3) on the outer sleeve (1) is aligned with a group of positioning screw holes (3) on the inner steel pipe (2) accurately and coaxially; step 4, locking and fixing, penetrating a bolt in the bolt assembly (4) into the aligned positioning screw hole (3) from one side of the outer sleeve (1), sleeving a flat gasket and a spring gasket at the other end of the bolt in sequence, and finally screwing up a matched nut until the bolt assembly (4) is tightly attached to the outer walls of the outer sleeve (1) and the inner steel pipe (2), so as to realize stable connection of the three; And 5, checking and accepting, namely checking whether the whole length L of the device meets the requirement of L-H less than or equal to 5mm by using a measuring tool, checking the locking degree of the bolt assembly (4), ensuring no loosening phenomenon, and installing the device on the top of the upright rod of the scaffold after the checking and accepting are qualified, so as to finish the adjustment and the fixation of the height of the scaffold.

Description

Novel steel pipe system device with adjustable length Technical Field The invention relates to the technical field of constructional engineering, in particular to a novel steel pipe system device with adjustable length. Background In construction engineering construction, the scaffold is a core facility for guaranteeing operation safety and supporting a construction structure, the scaffold steel pipe is used as a core material for constructing the scaffold, and the application scene of the scaffold steel pipe covers various construction scenes such as a template support frame, a sloping roof operation frame, an underground garage support and the like. The known scaffold steel pipe is mostly made of tubular steel, the conventional specification is 48mm in outer diameter and 3.0mm in wall thickness, and the scaffold steel pipe can be divided into key components such as vertical rods, horizontal rods, sweeping rods and the like according to the installation position and function difference of the scaffold steel pipe in a scaffold, so that a stable supporting system is formed together, and the scaffold steel pipe is an indispensable basic material in building construction. However, the construction scene has significant diversity and flexibility in the length requirements of the scaffold steel pipes. For example, in the construction process of a formwork support frame, the condition that the height of the free end of the vertical rod exceeds the standard, so that the support frame does not meet the safety standard often occurs, in the construction of a sloping roof, the scaffold vertical rods at different positions are required to be matched with different heights to ensure the flatness and stability of the support, and in addition, the construction of special areas such as an underground garage and an indoor short space is required to be carried out, so that the length of a steel pipe is also required to be adjusted in a targeted manner, and the space limiting requirement is met. All the scenes provide strict requirements on the length adaptability of the scaffold steel pipe, and the length of the steel pipe needs to be flexibly adjusted according to actual construction requirements so as to ensure the construction quality and safety. Currently, a commonly adopted solution is in-situ cutting treatment aiming at the requirements of steel pipes with different lengths in the industry. The method comprises the specific procedures of calculating the length according to the target height before construction, determining the specific size of the required steel pipe, then cutting the steel pipe with the standard length on site by using a cutting machine, and then using the cut steel pipe for scaffold erection. For example, in construction of a sloping roof formwork support frame, the adaptive length of each upright rod needs to be accurately calculated first, so that incapability of using the upright rods due to size deviation after cutting is avoided, and then cutting and installation are carried out by organisers. The method has the advantages that the method is low in material utilization rate, meanwhile, the method for additionally adding the frame body to the frame body is further caused, unnecessary consumption of frame body materials is further caused, the construction flow is complicated, accurate size calculation is needed before cutting, a cutting machine is needed to operate in the cutting process, a plurality of operators are needed to cooperate, the construction period is prolonged, manual cooperation cost is increased, the flexibility is insufficient, the length of the cut steel pipe is fixed, the cut steel pipe cannot be adjusted according to the temporary change of the height requirement in the construction process, if size calculation errors occur, the cut steel pipe is directly scrapped, the construction efficiency is further affected, a certain potential safety hazard exists in site cutting operation, the operation of the cutting machine needs professional skills, and the waste, noise and the like generated in the cutting process can also cause potential influence on the construction environment and the safety of the operators. The defects of the prior art lead to the long-term failure to effectively solve the problem of the length adaptation of the scaffold steel tube in the building construction, thereby not only increasing the construction cost, but also reducing the construction efficiency, and also having the safety risk, and becoming an important factor for restricting the refinement and the high-efficiency propulsion of the building construction. Disclosure of Invention The invention aims to provide a novel steel pipe system device with adjustable length, which aims to solve the problems of material waste and complicated construction caused by the fact that the traditional steel pipe needs to be cut on site to adapt to the length in the background technology. In order to achieve the above pur