CN212985772U - Bolt connection pair for power transmission tower - Google Patents
Bolt connection pair for power transmission tower Download PDFInfo
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- CN212985772U CN212985772U CN202020051672.6U CN202020051672U CN212985772U CN 212985772 U CN212985772 U CN 212985772U CN 202020051672 U CN202020051672 U CN 202020051672U CN 212985772 U CN212985772 U CN 212985772U
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- 229910000831 Steel Inorganic materials 0.000 claims description 3
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract description 9
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- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
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- 239000006227 byproduct Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model provides a bolt connection pair for a power transmission iron tower, which is used for fixing at least two connecting pieces and comprises a bent bolt (2) and a locknut (1); the locknut is provided with a lockcontact surface, the lockcontact surface is formed by a plurality of geometric shapes, and the locknut has different heights in the circumferential direction; after passing through the connecting piece, the bent bolt (2) is fixed by the check nut (1), and the anti-loosening contact surface of the check nut (1) faces towards the connecting piece, so that the structure is simple, the finish machining is not needed, the cost is greatly reduced, the good anti-loosening effect can be achieved, the anti-corrosion zinc coating on the surface of the connecting piece is prevented from being damaged, and a special gasket is not needed, the utility model provides a bolt connection pair is suitable for the field construction of a power transmission tower, and the construction is simple.
Description
Technical Field
The utility model relates to a transmission line technical field, concretely relates to bolted connection is vice for steel pylons.
Background
The bolt connection is one of the most common and simple and effective connection forms in the power transmission iron tower, and has the advantages of simple structure, convenience in disassembly, low cost and the like. The connection rigidity, damping performance and reliability of the bolted connection are of great importance to the safety of the entire structure. When the bolts of the power transmission tower are fastened, torque can be generated in the bolts, and the releasing of the torque can reduce the pretightening force of the bolts; meanwhile, under the condition of dynamic load (wind vibration or galloping) or large temperature difference, the bolt connection is easy to loosen and even fall off. Bolt joint failure is one of the important causes of a collapse accident.
The bolt connection pair in the prior art comprises a bolt, a nut and two washers, which are all produced in the same batch and are products processed in the same heat treatment process. The bolt can be divided into detachable locking and permanent locking according to the locking mode, wherein the permanent locking comprises spot welding, riveting, punching and bonding, and the detachable locking comprises friction locking, mechanical locking and deformed locking. The existing bolt with the anti-loosening effect has the disadvantages of complex structure, fine machining requirement, high cost and easy damage to the anti-corrosion zinc coating on the surface of the connecting piece.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of complex structure, need of finish machining, high cost and easy damage to an anti-corrosion zinc coating on the surface of a connecting piece in the prior art, the utility model provides a bolt connecting pair for a power transmission tower, which is used for fixing at least two connecting pieces and comprises a bent bolt (2) and a first locknut (1); the first locknut (1) has a lockcontact surface which is formed by a plurality of geometric shapes, and the first locknut (1) has different heights in the circumferential direction; the anti-loosening bolt is characterized in that the bent bolt (2) penetrates through the connecting piece and then is fixed with the first anti-loosening nut (1), the anti-loosening contact surface of the first anti-loosening nut (1) faces towards the connecting piece, the structure is simple, finish machining is not needed, the cost is greatly reduced, and an anti-corrosion zinc coating on the surface of the connecting piece is avoided.
In order to achieve the purpose, the utility model adopts the following scheme:
the utility model provides a bolt connection pair for a power transmission iron tower, which is used for fixing at least two connecting pieces and comprises a bent bolt (2) and a first locknut (1);
the first locknut (1) has a lockcontact surface which is formed by a plurality of geometric shapes, and the first locknut (1) has different heights in the circumferential direction;
the bent bolt (2) penetrates through the connecting piece and then is fixed with the first anti-loose nut (1), and the anti-loose contact surface of the first anti-loose nut (1) faces towards the connecting piece.
The anti-loose contact surface comprises a chamfer not penetrating through the whole first anti-loose nut (1), a cross section not penetrating through the whole first anti-loose nut (1) and a helicoid less than one circle of the first anti-loose nut (1).
When the anti-loose contact surface is a beveled surface which does not penetrate through the whole first anti-loose nut (1), the angle of the beveled surface of the first anti-loose nut (1) is 1-45 degrees;
when the anti-loose contact surface is a cross section which does not penetrate through the whole first anti-loose nut (1), the cross section is an L-shaped cross section, and the height of a boss of the L-shaped cross section is 10-50% of the thickness of the first anti-loose nut (1);
when the anti-loose contact surface is a spiral surface smaller than one circle of the first anti-loose nut (1), the angle of the inclined surface of the first anti-loose nut (1) ranges from 180 degrees to 345 degrees.
A plane nut (3) matched with the first locknut (1) is also arranged between the first locknut (1) and the connecting piece;
the plane nut (3) is fixed with the bent bolt (2) through threads.
A second locknut (6) with the structure completely the same as that of the first locknut (1) is arranged between the first locknut (1) and the connecting piece;
and the second locknut (6) is fixed with the bent bolt (2) through threads.
The anti-loose contact surface of the second anti-loose nut (6) faces the first anti-loose nut (1) or the connecting piece.
The first locknut (1) adopts a four-corner locknut, a pentagonal locknut, a hexagonal locknut, a heptagonal locknut or an octagonal locknut;
the head of the bent bolt (2) adopts a four-corner screw head, a pentagonal screw head, a hexagonal screw head, a heptagonal screw head or an octagonal screw head which are matched with the first locknut (1).
The planar nut (3) adopts a four-corner locknut, a pentagonal locknut, a hexagonal locknut, a heptagonal locknut or an octagonal locknut which are matched with the first locknut (1).
The second locknut (6) adopts a four-corner locknut, a pentagonal locknut, a hexagonal locknut, a heptagonal locknut or an octagonal locknut which are matched with the first locknut (1).
The first anti-loose nut (1) is provided with an internal thread, and the bent bolt (2) is provided with an external thread matched with the internal thread.
The plane nut (3) is provided with an internal thread matched with the external thread.
And the second locknut (6) is provided with an internal thread matched with the external thread.
Compared with the closest prior art, the utility model provides a technical scheme has following beneficial effect:
the bolt connecting pair provided by the utility model is used for fixing at least two connecting pieces, and comprises a bent bolt (2) and a first locknut (1); the first locknut (1) has a lockcontact surface which is formed by a plurality of geometric shapes, and the first locknut (1) has different heights in the circumferential direction; the bent bolt (2) penetrates through the connecting piece and then is fixed with the first locknut (1), and the locking contact surface of the first locknut (1) faces towards the connecting piece, so that the structure is simple, finish machining is not needed, the cost is greatly reduced, and an anti-corrosion zinc coating on the surface of the connecting piece is avoided;
the bolt connecting pair provided by the utility model can also comprise a plane nut (3); the plane nut (3) and the first locknut (1) are fixed with the bent bolt (2) sequentially through threads, and the anti-loose contact surface of the first locknut (1) faces the plane nut (3), or the plane nut (3), the first locknut (1) and the second locknut (6) are included; the second locknut (6) and the first locknut (1) are fixed with the bent bolt (2) sequentially through threads, the anti-loose contact surface of the first locknut (1) faces towards the second locknut (6), and the anti-loose contact surface of the second locknut (6) faces towards the first locknut (1) or the connecting piece, so that a good anti-loose effect can be achieved no matter a single bolt structure comprising one locknut, one planar nut and one bent bolt or a double bolt structure comprising two locknuts and one bent bolt;
the utility model provides a first locknut (1) in the bolted connection is vice and the locking contact surface of second locknut (6) all include not to carry through the scarf of whole locknut, not carry through the cross section of whole locknut and be less than the helicoid of locknut a week, ensure that the plane part of locknut anti-loosening surface contacts with second locknut (6), second locknut (6) locksurface plane part contacts with the connecting piece, utilize off-centre to produce the moment of flexure, avoid lacerating the anticorrosive galvanizing coat of second locknut (6) and connecting piece, and need not special gasket;
the utility model provides a vice field construction who is applicable to steel pylons of bolted connection, and the construction is simple.
Drawings
FIG. 1 is a diagram of a bolt connection pair including a locknut according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a force-bearing pair of a bolt connection including a locknut according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the anti-loosening of a bolt connection pair including a locknut according to an embodiment of the present invention;
FIG. 4 is a diagram of a bolt connection pair including a locknut and a flat nut according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the force applied to the bolt connection pair comprising a locknut and a flat nut according to the embodiment of the present invention;
fig. 6 is a schematic diagram of the anti-loosening of the bolt connection pair including a locknut and a flat nut according to the embodiment of the present invention;
fig. 7 is a schematic diagram of a first bolt connection pair including two locknuts according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a second bolt connection pair including two locknuts according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of an embodiment of the present invention showing a chamfered surface without penetrating the entire locknut;
FIG. 10 is a schematic cross-sectional view of an embodiment of the present invention, wherein the anti-loose contact surface is not through the whole anti-loose nut;
FIG. 11 is a schematic view of an embodiment of the present invention, wherein the anti-loose contact surface is a spiral surface with a circumference less than one turn of the anti-loose nut;
FIG. 12 is a schematic diagram of the embodiment of the present invention showing bending moment and deformation of the bolt connection by-product corresponding to the oblique plane of the whole locknut;
FIG. 13 is a schematic diagram of the embodiment of the present invention showing bending moment and deformation of the bolt connection by-product corresponding to the cross section of the whole locknut;
fig. 14 is a schematic diagram of the bending moment and deformation generated by the bolt connection corresponding to the spiral surface less than one circle of the locknut in the embodiment of the present invention;
in the figure, 1, a first locknut, 2, a bent bolt, 3, a plane nut, 4, one of the connectors, 5, the other connector, 6 and a second locknut.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
The embodiment 1 of the utility model provides a bolted connection pair for transmission tower, which is a bolted connection pair with a single-nut structure and is used for fixing two connecting pieces, namely a connecting piece 4 and a connecting piece 5, as shown in fig. 1, the bolted connection pair comprises a bent bolt 2 and a first locknut 1;
the first locknut 1 has a lockcontact surface, the lockcontact surface is composed of a plurality of geometric shapes, and the first locknut 1 has different heights in the circumferential direction;
first locknut 1 passes behind the connecting piece through screw and the bent bolt 2 and is fixed with first locknut 1, and the locking contact surface of first locknut 1 is towards the first connecting piece, is towards connecting piece 4 promptly.
As shown in fig. 9 to 11, the anti-loose contact surface comprises a chamfer not penetrating through the whole first anti-loose nut 1, a cross section not penetrating through the whole first anti-loose nut 1 and a helicoid less than one circle of the first anti-loose nut 1, so that a part of the plane of the first anti-loose nut 1 is ensured to be in contact with the connecting piece 4, and the anti-corrosion zinc coating of the connecting piece 4 is prevented from being scratched. The utility model discloses embodiment 1's first locknut 1 makes the nut connect vice atress distribution and changes because the inhomogeneous eccentric action that produces of locking contact surface, and first locknut 1 is drawn the bending effort to take place bending deformation, produce good locking effect, simple structure, low cost.
As shown in fig. 12, when the anti-loose contact surface is a chamfered surface which does not penetrate through the whole first anti-loose nut 1, the angle of the inclined surface of the first anti-loose nut 1 is 1 to 45 degrees;
as shown in fig. 13, when the anti-loose contact surface is a cross section that does not penetrate through the entire first anti-loose nut 1, the cross section is an L-shaped cross section, and the height of the boss of the L-shaped cross section is 10% to 50% of the thickness of the first anti-loose nut 1;
as shown in fig. 14, when the anti-loose contact surface is a spiral surface smaller than one turn of the first anti-loose nut 1, the angle of the inclined surface of the first anti-loose nut 1 is 180 ° to 345 °.
In fig. 12-14, M is the bending moment generated on the bent bolt 2, and Q is the pressure between the contact surfaces of the first locknut 1 and the connecting member 4.
The first locknut 1 is a quadrangular locknut, a pentagonal locknut, a hexagonal locknut, a heptagonal locknut or an octagonal locknut;
the head of the bent bolt 2 adopts a four-corner screw head, a pentagonal screw head, a hexagonal screw head, a heptagonal screw head or an octagonal screw head which are matched with the first locknut 1.
The first locknut 1 is provided with an internal thread, and the bent bolt 2 is provided with an external thread matched with the internal thread.
The bent bolt 2 and the first locknut 1 are made of stainless steel, aluminum alloy, low alloy steel or carbon steel.
The embodiment 1 provides a vice atress schematic diagram of bolted connection including a locknut is shown in fig. 2, and wherein P is the 2 axial pretightning forces of the edge of the bolt that bends that screw up first locknut 1 produced, and M is the moment of flexure that the interaction produced on the bolt that bends 2 between first locknut 1 and the connecting piece 4, and N1 receives horizontal load for connecting piece 4, and N2 receives horizontal load for connecting piece 5.
The embodiment 1 provides a vice locking principle of bolted connection including a locknut is shown in fig. 3, wherein, X is first locknut 1 atress direction, and Y is first locknut 1 pine and moves back the direction, screws up first locknut 1 with the spanner, produces along 2 axial pretightning forces of the bolt that bends, produces moment of flexure M on the bolt that bends 2 because first locknut 1's atress contact surface only has partly reason simultaneously. The bending moment M bends the bent bolt 2. Connecting piece 4 receives the dynamic load that horizontal load N1 and connecting piece 5 received the effect production of horizontal load N2, connecting piece 4 gives the ascending effort of a normal direction of first locknut 1, make first locknut 1 take place ascending trend, the power that first locknut 1 received is the perpendicular to contact surface, and the direction that first locknut 1 pine moved back is the axial of the bolt 2 that receives bending, there is an contained angle atress direction and direction of motion, consequently, the bolt 2 that receives bending can not the pine move back, play fine locking effect.
Example 2
The embodiment 2 of the utility model provides a bolted connection pair for transmission tower, it is the bolted connection pair of double nut structure, is used for fixing two connecting pieces, connecting piece 4 and connecting piece 5, as shown in fig. 4, the bolted connection pair includes curved bolt 2, first lock nut 1 and flat nut 3;
the first locknut 1 has a lockcontact surface which is composed of a plurality of geometric shapes and has different heights in the circumferential direction;
the bent bolt 2 penetrates through the connecting piece and then is fixed with the first locknut 1, and the anti-loose contact surface of the first locknut 1 faces the connecting piece 4. The plane nut 3 is arranged between the first locknut 1 and the connecting piece, is matched with the first locknut 1, and is fixed with the bent bolt 2 through threads. Namely, the plane nut 3 and the first locknut 1 are fixed with the bent bolt 2 sequentially through threads, and the anti-loose contact surface of the first locknut 1 faces the plane nut 3.
As shown in fig. 9 to 11, the anti-loose contact surface comprises a chamfer not penetrating through the whole first anti-loose nut 1, a cross section not penetrating through the whole first anti-loose nut 1 and a helicoid less than one circle of the first anti-loose nut 1, so that a part of a plane of the first anti-loose nut 1 is ensured to be in contact with the plane nut 3, and the anti-corrosion zinc coating of the plane nut 3 is prevented from being scratched. The utility model discloses embodiment 2's first locknut 1 makes the nut connect vice atress distribution and changes because the inhomogeneous eccentric action that produces of locking contact surface, and first locknut 1 is drawn the bending effort to take place bending deformation, produce good locking effect, simple structure, low cost.
As shown in fig. 12, when the anti-loose contact surface is a chamfered surface which does not penetrate through the whole first anti-loose nut 1, the angle of the inclined surface of the first anti-loose nut 1 is 1 to 45 degrees;
as shown in fig. 13, when the anti-loose contact surface is a cross section that does not penetrate through the entire first anti-loose nut 1, the cross section is an L-shaped cross section, and the height of the boss of the L-shaped cross section is 10% to 50% of the thickness of the first anti-loose nut 1;
as shown in fig. 14, when the anti-loose contact surface is a spiral surface smaller than one turn of the first anti-loose nut 1, the angle of the inclined surface of the first anti-loose nut 1 is 180 ° to 345 °.
The first locknut 1 and the planar nut 3 are respectively a quadrangular locknut, a pentagonal locknut, a hexagonal locknut, a heptagonal locknut or an octagonal locknut;
the head of the bent bolt 2 adopts a quadrangular screw head, a pentagonal screw head, a hexagonal screw head, a heptagonal screw head or an octagonal screw head which are matched with the first locknut 1 and the plane nut 3.
First locknut 1 and flat nut 3 all are equipped with the internal thread, and the bolt 2 that receives bends is equipped with the external screw thread with interior screw-thread fit.
The bent bolt 2, the first locknut 1 and the plane nut 3 are made of stainless steel, aluminum alloy, low alloy steel or carbon steel.
The embodiment 2 provides a vice atress schematic diagram of bolted connection including a locknut and a plane nut is shown in fig. 5, and wherein P is the axial pretightning force of 2 along the flexural bolts of screwing up first locknut 1 production, and M is the moment of flexure that the part between first locknut 1 and the connecting piece 4 produced, and N1 receives transverse load for connecting piece 4, and N2 receives transverse load for connecting piece 5.
The embodiment 2 provides a vice locking principle of bolted connection including a locknut and a plane nut as shown in fig. 6, wherein, X is first locknut 1 atress direction, and Y is first locknut 1 pine and moves back the direction, screws up first locknut 1 with the spanner, produces along 2 axial pretightning forces of the bolt that receives bending, produces moment of flexure M on the bolt that receives bending 2 because the atress contact surface of first locknut 1 only has partly reason simultaneously. The bending moment M enables the bent bolt 2 to slightly deform and bend, and the bolt above the first locknut 1 and the bolt below form an included angle. Connecting piece 4 receives the dynamic load that horizontal load N1 and connecting piece 5 received the effect production of horizontal load N2, connecting piece 4 gives plane nut 3 normal direction ascending effort, make plane nut 3 take place the trend that upwards pine moves back, when plane nut 3 upwards passes power for first locknut 1, because the contact surface is incomplete between first locknut 1 and the plane nut 3, lead to the contact force inhomogeneous, further cause the more serious off-centre of first locknut 1, further aggravate the bending of receiving bent bolt 2, plane nut 3 can't continue the pine and move back. The force that first locknut 1 received is the perpendicular to contact surface, and the direction that first locknut 1 pine moved back is the axial direction of flexural bolt 2, and there is an contained angle atress direction and direction of motion, therefore first locknut 1 also can not the pine move back, plays fine locking effect.
Example 3
The embodiment 3 of the utility model provides a bolted connection pair for a power transmission tower, which is a bolted connection pair with a double-nut structure and is used for fixing two connecting pieces, namely a connecting piece 4 and a connecting piece 5, and the bolted connection pair comprises a bent bolt 2, a first locknut 1 and a second locknut 6;
the first locknut 1 and the second locknut 6 are both provided with lockcontact surfaces, each lockcontact surface is formed by a plurality of geometric shapes, and the first locknut 1 and the second locknut 6 have different heights in the circumferential direction;
the second locknut 6 is arranged between the first locknut 1 and the connecting piece 4, and has the same structure as the first locknut 1, and the second locknut 6 is fixed with the bent bolt 2 through threads. The second locknut 6 and the first locknut 1 are fixed with the bent bolt 2 sequentially through threads, the anti-loose contact surface of the first locknut 1 faces the second locknut 6, and the anti-loose contact surface of the second locknut 6 faces the first locknut 1 or the connecting piece 4.
As shown in fig. 9 to 11, the anti-loose contact surface of the first anti-loose nut 1 includes a chamfered surface not penetrating the entire first anti-loose nut 1, a cross-sectional surface not penetrating the entire first anti-loose nut 1, and a helicoid surface less than one turn of the first anti-loose nut 1; and a part of plane of the first locknut 1 is ensured to be in contact with the second locknut 6, so that the anti-corrosion zinc coating of the second locknut 6 is prevented from being scratched. The utility model discloses embodiment 3 because the inhomogeneous production eccentric action of locking contact surface makes the nut connect vice atress distribution and changes, and first locknut 1 is drawn the bending effort to take place bending deformation, produce good locking effect, simple structure, low cost.
As shown in fig. 12, when the anti-loose contact surface is a chamfered surface which does not penetrate through the whole first anti-loose nut 1, the angle of the inclined surface of the first anti-loose nut 1 is 1 to 45 degrees;
as shown in fig. 13, when the anti-loose contact surface is a cross section that does not penetrate through the entire first anti-loose nut 1, the cross section is an L-shaped cross section, and the height of the boss of the L-shaped cross section is 10% to 50% of the thickness of the first anti-loose nut 1;
as shown in fig. 14, when the anti-loose contact surface is a spiral surface smaller than one turn of the first anti-loose nut 1, the angle of the inclined surface of the first anti-loose nut 1 is 180 ° to 345 °.
As shown in fig. 9 to 11, the anti-loose contact surface of the second anti-loose nut 6 includes a chamfered surface not penetrating the entire second anti-loose nut 6, a transverse surface not penetrating the entire second anti-loose nut 6, and a helicoid surface less than one turn of the second anti-loose nut 6; and a part of plane of the second locknut 6 is ensured to be contacted with the connecting piece 4, and the anti-corrosion zinc coating of the connecting piece 4 is prevented from being scratched. The utility model discloses second locknut 6 of embodiment 3 makes the nut connect vice atress distribution and changes because the inhomogeneous eccentric action that produces of locking contact surface, and second locknut 6 is drawn the curved effort to take place bending deformation, produce good locking effect, simple structure, low cost.
As shown in fig. 12, when the anti-loose contact surface is a chamfered surface which does not penetrate through the whole second locknut 6, the angle of the inclined surface of the second locknut 6 is 1 to 45 degrees;
as shown in fig. 13, the anti-loose contact surface is a cross section which does not penetrate through the whole second anti-loose nut 6, the cross section is an L-shaped cross section, and the height of a boss of the L-shaped cross section is 10% -50% of the thickness of the second anti-loose nut 6;
as shown in fig. 14, when the anti-loose contact surface is a spiral surface smaller than one turn of the second anti-loose nut 6, the angle of the inclined surface of the second anti-loose nut 6 is 180 to 345 °.
The first locknut 1 and the second locknut 6 are respectively a quadrangular locknut, a pentagonal locknut, a hexagonal locknut, a heptagonal locknut or an octagonal locknut;
the head of the bent bolt 2 adopts a four-corner screw head, a pentagonal screw head, a hexagonal screw head, a heptagonal screw head or an octagonal screw head which are matched with the first locknut 1 and the second locknut 6.
First locknut 1 and second locknut 6 all are equipped with the internal thread, and the flexural bolt 2 is equipped with the external screw thread with interior screw-thread fit.
The bent bolt 2, the first locknut 1 and the second locknut 6 are made of stainless steel, aluminum alloy, low alloy steel or carbon steel.
When second locknut 6's locking contact surface was towards first locknut 1, the utility model discloses the vice atress sketch map of bolted connection including two locknuts that 3 provided is shown in fig. 7, and when second locknut 6's locking contact surface was towards connecting piece 4, the utility model discloses the vice atress sketch map of bolted connection including two locknuts that 3 provided is shown in fig. 8, wherein, P is the axial pretightning force of 2 along the flexural bolts that tighten locknut and produce, and M is the moment of flexure that the part between locknut and the connecting piece 4 produced, and N1 receives horizontal load for connecting piece 4, and N2 receives horizontal load for connecting piece 5. The locking contact surface of the second locknut 6 faces the locking contact surfaces of the first locknut 1 and the second locknut 6 and faces the connecting piece 4, so that a good locking effect can be achieved.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and those skilled in the art can still modify or substitute the specific embodiments of the present invention with reference to the above embodiments, and any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are all within the scope of the claims of the present invention pending.
Claims (12)
1. A bolt connection pair for a power transmission tower is characterized by being used for fixing at least two connecting pieces and comprising a bent bolt (2) and a first locknut (1);
the first locknut (1) has a lockcontact surface which is formed by a plurality of geometric shapes, and the first locknut (1) has different heights in the circumferential direction;
the bent bolt (2) penetrates through the connecting piece and then is fixed with the first anti-loose nut (1), and the anti-loose contact surface of the first anti-loose nut (1) faces towards the connecting piece.
2. The bolting pair for a pylon according to claim 1 wherein said anti-loosening contact surface comprises a chamfer not penetrating the entire first anti-loosening nut (1), a transverse plane not penetrating the entire first anti-loosening nut (1) and a helicoid less than one revolution of the first anti-loosening nut (1).
3. The bolt connection pair for the power transmission tower as claimed in claim 2, wherein the anti-loose contact surface is a beveled surface which does not penetrate through the whole first anti-loose nut (1), and the angle of the beveled surface of the first anti-loose nut (1) is 1-45 degrees;
when the anti-loose contact surface is a cross section which does not penetrate through the whole first anti-loose nut (1), the cross section is an L-shaped cross section, and the height of a boss of the L-shaped cross section is 10-50% of the thickness of the first anti-loose nut (1);
when the anti-loose contact surface is a spiral surface smaller than one circle of the first anti-loose nut (1), the angle of the inclined surface of the first anti-loose nut (1) ranges from 180 degrees to 345 degrees.
4. The bolt connection pair for the transmission tower according to claim 1, characterized in that a flat nut (3) matched with the first locknut (1) is further arranged between the first locknut (1) and the connecting piece;
the plane nut (3) is fixed with the bent bolt (2) through threads.
5. The bolt connection pair for the power transmission tower according to claim 4, characterized in that a second locknut (6) with the same structure as the first locknut (1) is arranged between the first locknut (1) and the connecting piece;
and the second locknut (6) is fixed with the bent bolt (2) through threads.
6. The bolting pair for transmission towers according to claim 5, characterised in that the anti-loose contact surface of said second anti-loose nut (6) faces the first anti-loose nut (1) or the connector.
7. The bolted connection pair for an iron pylon according to claim 5, characterized in that the first locknut (1) is a quadrangular locknut, a pentagonal locknut, a hexagonal locknut, a heptagonal locknut or an octagonal locknut;
the head of the bent bolt (2) adopts a four-corner screw head, a pentagonal screw head, a hexagonal screw head, a heptagonal screw head or an octagonal screw head which are matched with the first locknut (1).
8. The bolted connection pair for an iron pylon according to claim 4, characterized in that the planar nut (3) is a square locknut, a pentagonal locknut, a hexagonal locknut, a heptagonal locknut or an octagonal locknut which is matched with the first locknut (1).
9. The bolted connection pair for an iron pylon according to claim 7, wherein the second locknut (6) is a square locknut, a pentagonal locknut, a hexagonal locknut, a heptagonal locknut or an octagonal locknut which is matched with the first locknut (1).
10. The bolted connection pair for steel pylons according to claim 5, characterized in that said first locknut (1) is provided with an internal thread and said bent bolt (2) is provided with an external thread cooperating with said internal thread.
11. Bolted joint for transmission towers according to claim 10, characterized in that said flat nut (3) is provided with an internal thread cooperating with said external thread.
12. Bolted joint for transmission towers according to claim 10, characterized in that said second locknut (6) is provided with an internal thread cooperating with said external thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020051672.6U CN212985772U (en) | 2020-01-10 | 2020-01-10 | Bolt connection pair for power transmission tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020051672.6U CN212985772U (en) | 2020-01-10 | 2020-01-10 | Bolt connection pair for power transmission tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212985772U true CN212985772U (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020051672.6U Active CN212985772U (en) | 2020-01-10 | 2020-01-10 | Bolt connection pair for power transmission tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212985772U (en) |
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2020
- 2020-01-10 CN CN202020051672.6U patent/CN212985772U/en active Active
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