CN217841090U - Non-shear double-layer rigid flange joint - Google Patents

Abstract

The utility model discloses a double-deck rigid flange node of no shear force, include: the device comprises an upper side main pipe, a lower side main pipe, an upper side flange plate, a lower side flange plate, an upper side vertical stiffening plate, a lower side vertical stiffening plate, an upper side annular connecting plate, a lower side annular connecting plate, a tensile bolt and a shear bolt; the upper main pipe and the lower main pipe are coaxially arranged, the upper flange plate and the lower flange plate are respectively and radially connected to the outer side surfaces of the upper main pipe and the lower main pipe, the upper annular connecting plate and the lower annular connecting plate are respectively and radially connected to the outer side surfaces of the upper main pipe and the lower main pipe, and the plurality of upper vertical stiffening plates and the plurality of lower vertical stiffening plates are arranged between the upper flange plate and the upper annular connecting plate as well as between the lower flange plate and the lower annular connecting plate; the upper side flange plate and the lower side flange plate are respectively provided with a first bolt hole group and a second bolt hole group which are respectively used for being matched with a shear bolt and a tensile bolt; the utility model discloses form different load structures with the bolt cooperation of different models down, have composite load's tensile and ability of shearing.

Description

Non-shear double-layer rigid flange joint

Technical Field

The utility model relates to a fields such as transmission of electricity steel pipe pylon, housing construction, bridge engineering specifically are a double-deck rigid flange node of no shear force.

Background

With the planning construction of extra-high voltage lines and the application of the same-tower multi-loop technology, the external load of the power transmission iron tower is increased in multiples, and the iron tower structure tends to be large-sized. The steel tube tower has the advantages of simple structure, high integral rigidity and good bearing capacity, and is suitable for being applied to iron towers with large loads. The steel pipe tower popularized and applied in a large-load iron tower can effectively reduce the tower weight, reduce the pole tower root opening, compress a line corridor and reduce the removal and vegetation damage. The closed circular section steel tube has the advantages of good air flow performance, isotropic stress, good torsion resistance, high stable bearing capacity, large bending rigidity, better corrosion resistance effect than that of an opening section, convenience in processing, good visual effect and the like. The steel pipe member is widely applied to the industries of electric power, metallurgy, petroleum, chemical industry, post and telecommunications and the like, particularly, the steel pipe member is widely applied to broadcasting and television towers with 200-300 m heights from quadrangles to octagons in broadcasting and television systems, and the steel pipe member is quite common and becomes the main structural form of the television towers.

From the design experience in foreign countries, most of the heavy-load towers in developed countries adopt steel tube tower structures. From the 90 s of the last century, japan has used the steel tube tower structure in high-voltage and extra-high voltage engineering, and has adopted the structure system in 1000kV extra-high voltage line and transmission high tower, and has developed experimental research and theoretical analysis about the application of steel tube tower engineering; also, steel pipe towers are widely used in korea on 750kV transmission lines. The application of the steel pipe tower in the power transmission iron tower in China is relatively late, the domestic steel pipe tower structure is mostly used in a large-span 500kV double-loop power transmission iron tower and a part of power transformation frameworks, and the 1000kV double-loop ultra-high voltage transmission line completely adopts the steel pipe tower structure.

The main material connection of the power transmission steel pipe tower usually adopts flange joints, and a typical bolt-flange connection mode comprises a bolt assembly, a flange plate, a gasket and the like. Common flange forms are rigid flanges, flexible flanges and forged necked flanges. The rigid flange has better connection rigidity and bearing capacity characteristics, but the welding workload is large, the welding of the stiffening ribs is manual welding, and the local part of the node has larger welding residual stress; the flexible flange has smaller disk surface connection rigidity and larger disk surface deformation, and is generally used as a secondary rod member node; the diameter and the wall thickness of a neck opening of a forged connecting steel pipe with a neck flange and a neck welding flange are basically consistent, the forged connecting steel pipe with the neck flange is connected with the neck welding flange through a butt welding seam, the neck flange is provided with a section of straight neck section and a slope changing section, the stress of the flange is coordinated, the structure of the flange is more reasonable, the stress performance and the connection rigidity of a stiffening flange are improved, and if the neck flange is reasonably designed, the connection rigidity of the stiffening flange is between the stiffening flange and the stiffening flange. The neck flange connection is forged without welding stiffening ribs, and the butt welding seam can be mechanically welded, so that the heavy work of manual welding of stiffening flange stiffening ribs can be solved, and the manufacturing efficiency and the mechanization efficiency are improved. For the flange types, the specification of the bolts is increased due to the combined load effect of the main tensile force and the shearing force of the joint connecting bolts, so that the size of the flange plate is increased, the economy is poor, and the reliability is low.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome not enough among the prior art, the utility model provides a double-deck rigid flange node of no shear force, through the utility model discloses a flange node's structural design, this node are provided with the multiunit bolt hole and form the load structure of different functions under the bolt cooperation with different models, and then combine the design of this node itself to have composite load's tensile and ability of shearing.

The technical scheme is as follows: first aspect the utility model provides a double-deck rigid flange node of no shear force, include:

the upper main pipe, the lower main pipe coaxially arranged at the bottom of the upper main pipe, an upper flange plate radially connected to the outer side surface of the upper main pipe, a lower flange plate radially connected to the outer side surface of the lower main pipe, an upper annular connecting plate radially connected to the outer side surface of the upper main pipe, a lower annular connecting plate radially connected to the outer side surface of the lower main pipe, a plurality of upper vertical stiffening plates arranged between the upper flange plate and the upper annular connecting plate, and a plurality of lower vertical stiffening plates arranged between the lower flange plate and the lower annular connecting plate;

the lower side surface of the upper annular connecting plate is opposite to the upper side surface of the upper flange plate;

the upper side surface of the lower annular connecting plate is opposite to the lower side surface of the lower flange plate;

the upper side flange plate and the lower side flange plate are respectively provided with a first bolt hole group and a second bolt hole group; the first bolt hole group and the second bolt hole group are distributed in an annular array shape; the first bolt hole group is positioned on the outer ring of the second bolt hole group and is positioned on the edges of the upper flange plate and the lower flange plate;

the first bolt hole group is used for being matched with the shear bolt, and the second bolt hole group is used for being matched with the tensile bolt.

In a further embodiment, three side edges of the upper vertical stiffening plates are respectively connected with the outer side surface of the upper main pipe, the lower side surface of the upper annular connecting plate and the upper side surface of the upper flange plate are fixedly welded, and the upper vertical stiffening plates are distributed in an annular array;

the three side of a plurality of vertical stiffening plates of downside respectively with the lateral surface that the downside is responsible for, downside hoop connecting plate upper flank with be annular array form between a plurality of vertical stiffening plates of downside fixed weld of downside flange board and distribute.

In a further embodiment, a third bolt hole group is arranged on the upper circumferential connecting plate, and the third bolt hole group corresponds to the second bolt hole group of the upper flange plate and has the same diameter;

and when a plurality of tensile bolts penetrate through the third bolt hole group and are fixed in each bolt hole of the second bolt hole group, the tensile bolts are used for fixedly connecting the upper side flange plate and the upper side annular connecting plate.

In a further embodiment, a fourth bolt hole group is arranged on the lower annular connecting plate, and the fourth bolt hole group corresponds to the second bolt hole group of the lower flange plate and has the same diameter;

and when a plurality of tensile bolts penetrate through the fourth bolt hole group to be fixed in each bolt hole of the second bolt hole group, the tensile bolts are used for fixedly connecting the lower side flange plate and the lower side annular connecting plate.

In a further embodiment, each bolt hole of the first bolt hole group of the upper side flange plate and the first bolt hole group of the lower side flange plate is used for being in bolt connection with a shear bolt, and the upper side flange plate and the lower side flange plate are fixedly coupled through the shear bolt.

In a further embodiment, the diameter of each bolt hole in the second group of bolt holes is larger than the diameter of the adapted tension bolt.

In a further embodiment, the diameter of each bolt hole in the first group of bolt holes is larger than the diameter of the adapted shear bolt.

In a further embodiment, the position of each bolt hole in the second and third bolt hole groups of the upper flange plate is located in the space between the upper vertical stiffening plates;

and the position of each bolt hole in the second bolt hole group and the fourth bolt hole group of the lower flange plate is positioned in the interval between the plurality of lower vertical stiffening plates.

Has the beneficial effects that: compared with the prior art, the utility model has the following advantage:

(1) The first bolt hole group is used for being matched with the shear bolt, the second bolt hole group is used for being matched with the tensile bolt, and in the practical application process, different bolts are clearly divided in labor in the node stress process, so that the force transmission path is clear, and the node has the tensile and shear resistance capacity of composite load;

(2) Compared with the traditional rigid flange, the inner ring tensile bolt only bears the tensile force, and the size of the bolt can be effectively reduced. The vertical stiffening plates, the flange plates and the circumferential stiffening plates in each interval form a box-shaped section, and bear bending moment of flange grids or flange intervals together, so that the heights of the flange plates and the vertical stiffening plates can be effectively reduced, and the overall size and structural design of the node are simplified;

(3) The vertical stiffening plates of the flange are arranged between the flange plate and the annular connecting plate, the installation space of the bolts is not controlled by the vertical stiffening plates any more, and the annular space of the inner side bolts can be effectively compressed, so that the distance from the inner side tensile bolts to the outer wall of the main pipe is reduced, and the plane size of the flange plate can be reduced;

(4) The shear bolts only bear the shearing force, and the number and the specification of the shear bolts can be changed according to the shearing force applied to the node.

Drawings

FIG. 1 is a schematic illustration of a butt joint of a shear-free double-layer rigid flange joint;

FIG. 2 is a top view of a shear-free double-layer rigid flange node;

FIG. 3 is a partial enlarged view of a non-shear double-layer rigid flange node.

Reference numerals: 1-upside is responsible for, 2-downside is responsible for, 3-upside flange board, 4-downside flange board, 5-upside vertical stiffener, 6-downside vertical stiffener, 7-upside hoop connecting plate, 8-downside hoop connecting plate, 9-tensile bolt, 10-shear bolt.

Detailed Description

In order to understand the technical content of the present invention more fully, the technical solutions of the present invention will be further described and illustrated with reference to the specific embodiments, but not limited thereto.

A shear-free double-layer rigid flange node in the present embodiment is further illustrated in fig. 1, the node comprising: the upper side is responsible for 1, the downside is responsible for 2, the upper side flange board 3, the lower side flange board 4, the vertical stiffening plate of upside 5, the vertical stiffening plate of downside 6, upside hoop connecting plate 7, downside hoop connecting plate 8, tensile bolt 9, shear bolt 10.

Wherein, the lower main pipe 2 is coaxially arranged at the bottom of the upper main pipe 1, so that the upper main pipe 1 and the lower main pipe 2 are in butt joint assembly; the upper flange plate 3 is radially connected to the outer side face of the upper main pipe 1, the lower flange plate 4 is radially connected to the outer side face of the lower main pipe 2, the upper annular connecting plate 7 is radially connected to the outer side face of the upper main pipe 1, the lower annular connecting plate 8 is radially connected to the outer side face of the lower main pipe 2, the upper vertical stiffening plates 5 are arranged between the upper flange plate 3 and the upper annular connecting plate 7, and the lower vertical stiffening plates 6 are arranged between the lower flange plate 4 and the lower annular connecting plate 8; in the implementation, the connection of the invention comprises other integrated connection modes such as welding and the like;

in this embodiment, the upper main pipe 1 and the lower main pipe 2 are welded and fixed to the upper flange plate 3, the lower flange plate 4, the upper annular connecting plate 7, and the lower annular connecting plate 8, respectively, by using annular welding seams.

The lower side surface of the upper annular connecting plate 7 is arranged opposite to the upper side surface of the upper flange plate 3, and the upper side surface of the lower annular connecting plate 8 is arranged opposite to the lower side surface of the lower flange plate 4;

the vertical stiffener 5 of a plurality of upsides adopts trilateral boxing to be responsible for 1, upside hoop connecting plate 7, the fixed concrete of upside flange plate 3 respectively: three side edges of the upper vertical stiffening plates 5 are respectively fixedly welded with the outer side surface of the upper main pipe 1, the lower side surface of the upper annular connecting plate 7 and the upper side surface of the upper flange plate 3, and the plurality of upper vertical stiffening plates 5 are distributed in an annular array around the outer side surface of the upper main pipe 1;

vertical stiffener 6 of a plurality of downside adopts trilateral girth welding to be responsible for 2, the annular connecting plate of downside 8, the fixed concrete of downside flange plate 4 respectively:

three sides of the lower vertical stiffening plates 6 are respectively connected with the outer side surfaces of the lower main pipes 2, and the upper side surface of the lower annular connecting plate 8 and the lower side surface of the lower flange plate 4 are fixedly welded between the lower vertical stiffening plates 6 and surround the outer side surfaces of the lower main pipes 2 to form annular array distribution.

The upper flange plate 3 and the lower flange plate 4 are respectively provided with a first bolt hole group and a second bolt hole group; the first bolt hole group and the second bolt hole group are distributed in an annular array shape; the first set of bolt holes is located in the outer ring of the second set of bolt holes and the first set of bolt holes is located in the edges of the upper flange plate 3 and the lower flange plate 4.

A third bolt hole group is arranged on the upper annular connecting plate 7, corresponds to the second bolt hole group of the upper flange plate 3 and has the same diameter; when a plurality of tensile bolts 9 are inserted through the third bolt hole group into each bolt hole of the second bolt hole group, for the fixed coupling of the upper flange plate 3 and the upper annular connecting plate 7.

A fourth bolt hole group is arranged on the lower annular connecting plate 8, corresponds to the second bolt hole group of the lower flange plate 4 and has the same diameter; when a plurality of tensile bolts 9 are inserted through the fourth bolt hole group into each bolt hole of the second bolt hole group, for the fixed coupling of the lower flange plate 4 and the lower annular connecting plate 8.

The integral fixation of the flange joint is realized through the fixed connection of the upper flange plate 3 and the upper annular connecting plate 7 and the fixed connection of the lower flange plate 4 and the lower annular connecting plate 8, and the joint has the tensile load capacity in a certain range through the fixed assembly of a plurality of tensile bolts 9.

Each bolt hole of the first bolt hole group of the upper flange plate 3 and the first bolt hole group of the lower flange plate 4 is adapted to a shear bolt 10, and the upper flange plate 3 and the lower flange plate 4 are fixedly connected through the shear bolt 10; a range of shear load capacity is added between the upper and lower flange plates 3, 4 by a plurality of shear bolts 10.

Further, the diameter of each bolt hole in the second bolt hole group is larger than the diameter of the adapted tensile bolt 9, the diameter of each bolt hole in the first bolt hole group is larger than the diameter of the adapted shear bolt 10, in this embodiment, the diameter of the corresponding bolt hole is 4mm larger than the diameter of the tensile bolt 9, and the diameter of the corresponding bolt hole is 1.5mm larger than the diameter of the shear bolt 10; the stress area of the bolt holes is reduced, deformation is avoided, and different bolts are made to have definite labor division in the node stress process, so that the force transmission path is definite, and corresponding shearing force and pulling force are borne.

The position of each bolt hole in the second bolt hole group and the third bolt hole group of the upper flange plate 3 is positioned in the interval between the vertical stiffening plates 5 on the upper sides; the position of each bolt hole in the second bolt hole group and the fourth bolt hole group of the lower flange plate 4 is positioned in the interval between the plurality of lower vertical stiffening plates 6; therefore, the vertical stiffening plates, the flange plates and the circumferential stiffening plates in each interval form a box-shaped section, the box-shaped section jointly bears the bending moment of the flange grids or the flange intervals, the heights of the flange plates and the vertical stiffening plates can be effectively reduced, and the overall size and the structural design of the node are simplified.

The working principle is as follows:

the manufacturing method comprises the following steps that a factory finishes the processing and manufacturing of an upper main pipe 1, a lower main pipe 2, an upper flange plate 3, a lower flange plate 4, an upper vertical stiffening plate 5, a lower vertical stiffening plate 6, an upper annular connecting plate 7, a lower annular connecting plate 8, a tensile bolt 9 and a shear bolt 10; opening a first bolt hole group, a second bolt hole group, a third bolt hole group and a fourth bolt hole group on the upper flange plate 3, the lower flange plate 4, the upper annular connecting plate 7 and the lower annular connecting plate 8; respectively welding and fixing the upper main pipe 1 and the lower main pipe 2 with an upper flange plate 3, a lower flange plate 4, an upper annular connecting plate 7 and a lower annular connecting plate 8 by adopting an annular welding method; a plurality of upper vertical stiffening plates 5 are respectively fixed with the upper main pipe 1, the upper annular connecting plate 7 and the upper flange plate 3 by adopting a three-side girth welding mode; the lower vertical stiffening plates 6 are respectively fixed with the lower main pipe 2, the lower annular connecting plate 8 and the lower flange plate 4, and after welding, a factory finishes weld quality detection of corresponding welds, and repairs and detects welds which do not meet quality requirements; the trial assembly work of the steel pipe corresponding to the flange joint is completed in a factory; after the steel pipe containing the flange joint is transported to a construction site, hoisting and installing the steel pipe by adopting a holding pole or a truck crane, and performing installation work in high altitude;

during installation, a plurality of tensile bolts 9 penetrate through the third bolt hole group to be fixed in each bolt hole of the second bolt hole group and are used for fixedly connecting the upper flange plate 3 and the upper annular connecting plate 7; a plurality of tensile bolts 9 penetrate through the fourth bolt hole group and are fixed in each bolt hole of the second bolt hole group, and are used for fixedly connecting the lower flange plate 4 and the lower annular connecting plate 8; each bolt hole of the first bolt hole group of the upper flange plate 3 and the first bolt hole group of the lower flange plate 4 is fixedly installed with a shear bolt 10, and the upper flange plate 3 and the lower flange plate 4 are fixedly connected through the shear bolt 10;

after installation, the node is fixedly connected with the upper flange plate 3 and the upper annular connecting plate 7 and fixedly connected with the lower flange plate 4 and the lower annular connecting plate 8, so that the flange node is integrally fixed, the node has tensile load capacity within a certain range through fixed assembly with a plurality of tensile bolts 9, and shear load capacity within a certain range is increased between the upper flange plate 3 and the lower flange plate 4 through a plurality of shear bolts 10.

In conclusion, the utility model discloses first bolt hole group is used for with shear bolt 10 adaptation, and second bolt hole group is used for with tensile bolt 9 adaptation, and different bolts divide the worker definitely at node atress in-process in the practical application, therefore pass the power route clear and definite, make the node have the tensile and the shear capacity of compound load; compared with the traditional rigid flange, the inner ring tensile bolt 9 only bears the tensile force, and the size of the bolt can be effectively reduced. The vertical stiffening plates, the flange plates and the annular stiffening plates in each interval form a box-shaped section, and bear bending moment of flange grids or flange intervals together, so that the heights of the flange plates and the vertical stiffening plates can be effectively reduced, and the overall size and structural design of the node are simplified; the vertical stiffening plates of the flange are arranged between the flange plate and the annular connecting plate, the installation space of the bolts is not controlled by the vertical stiffening plates any more, and the annular space of the inner side bolts can be effectively compressed, so that the distance from the inner side tensile bolts 9 to the outer wall of the main pipe is reduced, and the plane size of the flange plate can be reduced; the shear bolts 10 are subjected to only shear forces, and the number and specifications of the shear bolts 10 may be changed according to the shear force applied to the node. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A shear-free double-layer rigid flange node, comprising:

the upper main pipe, the lower main pipe coaxially arranged at the bottom of the upper main pipe, an upper flange plate radially connected to the outer side surface of the upper main pipe, a lower flange plate radially connected to the outer side surface of the lower main pipe, an upper annular connecting plate radially connected to the outer side surface of the upper main pipe, a lower annular connecting plate radially connected to the outer side surface of the lower main pipe, a plurality of upper vertical stiffening plates arranged between the upper flange plate and the upper annular connecting plate, and a plurality of lower vertical stiffening plates arranged between the lower flange plate and the lower annular connecting plate;

the lower side surface of the upper annular connecting plate is opposite to the upper side surface of the upper flange plate;

the upper side surface of the lower annular connecting plate is opposite to the lower side surface of the lower flange plate;

the upper flange plate and the lower flange plate are respectively provided with a first bolt hole group and a second bolt hole group; the first bolt hole group and the second bolt hole group are distributed in an annular array shape; the first bolt hole group is positioned on the outer ring of the second bolt hole group and is positioned on the edges of the upper flange plate and the lower flange plate;

the first bolt hole group is used for being matched with the shear bolt, and the second bolt hole group is used for being matched with the tensile bolt.

2. The shear-free double-layer rigid flange node according to claim 1, wherein three side edges of the upper vertical stiffening plates are respectively welded to the outer side surface of the upper main pipe, the lower side surface of the upper annular connecting plate and the upper side surface of the upper flange plate are fixedly welded, and the upper vertical stiffening plates are distributed in an annular array;

three sides of a plurality of downside vertical stiffening plates respectively with the lateral surface that the downside is responsible for, downside hoop connecting plate upper flank with be annular array form between a plurality of downside vertical stiffening plates of downside fixed weld of downside flange board and distribute.

3. A shear-free double-layer rigid flange joint as claimed in claim 1, wherein the upper circumferential connecting plate is provided with a third bolt hole group, and the third bolt hole group corresponds to the second bolt hole group of the upper flange plate and has the same diameter;

and when a plurality of tensile bolts penetrate through the third bolt hole group and are fixed in each bolt hole of the second bolt hole group, the tensile bolts are used for fixedly connecting the upper flange plate and the upper annular connecting plate.

4. A shear-free double-layer rigid flange joint according to claim 1, wherein a fourth bolt hole group is arranged on the lower annular connecting plate, and the fourth bolt hole group corresponds to the second bolt hole group of the lower flange plate and has the same diameter;

and when a plurality of tensile bolts penetrate through the fourth bolt hole group and are fixed in each bolt hole of the second bolt hole group, the tensile bolts are used for fixedly connecting the lower side flange plate and the lower side annular connecting plate.

5. A shear-free double-layer rigid flange joint as claimed in claim 1, wherein each bolt hole of the first bolt hole group of the upper flange plate and the first bolt hole group of the lower flange plate is adapted to be threadedly fastened with a shear bolt, and the upper flange plate and the lower flange plate are fixedly coupled by the shear bolt.

6. A shear-free double-layer rigid flange node according to claim 1, wherein the diameter of each bolt hole in the second group of bolt holes is greater than the diameter of the adapted tension bolt.

7. A shear-free double-layer rigid flange node according to claim 1, wherein the diameter of each bolt hole in the first bolt hole group is greater than the diameter of the adapted shear bolt.

8. A shear-free double-layer rigid flange joint according to claim 3, wherein the position of each bolt hole in the second and third bolt hole groups of the upper flange plate is located in the space between the upper vertical stiffening plates;

and the position of each bolt hole in the second bolt hole group and the fourth bolt hole group of the lower flange plate is positioned in the interval between the plurality of lower vertical stiffening plates.

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