CN214836871U

CN214836871U - Wind power hybrid tower prefabricated tower cylinder connected in pull-resisting mode through bolts and connecting piece

Info

Publication number: CN214836871U
Application number: CN202121345481.1U
Authority: CN
Inventors: 李伟文; 梁锦涛; 杨卫平; 彭渠; 杨旭超; 余光
Original assignee: China Railway 24th Bureau Group Bridge Construction Co ltd
Current assignee: China Railway 24th Bureau Group Bridge Construction Co ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2021-11-23
Anticipated expiration: 2031-06-15

Abstract

The utility model provides an adopt wind-powered electricity generation of bolt anti-pulling formula connection to mix tower prefabricated tower section of thick bamboo connecting piece, including high strength bolt, the unthreaded sleeve that excels in, the threaded sleeve that excels in slightly be longer than the unthreaded sleeve that excels in low yield point deformation steel sleeve, rigidity backing plate, the rigidity backing plate is established to the bolt upper end cover that excels in, and the bolt upper portion that excels in is connected through the low yield point deformation steel sleeve of cold extrusion with the unthreaded sleeve that excels in, and the bolt lower part that excels in passes through threaded connection with the threaded sleeve that excels in. The utility model discloses a screw up the low yield point steel of high strength bolt extrusion and the threaded sleeve that excels in and be connected, the high strength bolt passes through threaded connection with the threaded sleeve that excels in, has improved bolted connection position rigidity, can satisfy wind turbine generator system high altitude construction, the requirement of maximization simultaneously, avoids using prestressing force and grouting method, has construction convenience, advantages such as the atress is simple.

Description

Wind power hybrid tower prefabricated tower cylinder connected in pull-resisting mode through bolts and connecting piece

Technical Field

The utility model relates to a precast concrete tower section of thick bamboo technical field, concretely relates to precast concrete tower section of thick bamboo connecting piece.

Background

With the development of wind power industry in China, wind power resources are continuously developed and utilized, the demand of wind turbine generators is more and more large, and compared with a steel tower drum, the concrete tower drum has the advantages of low cost, convenience in transportation, wide material source, good durability, high temperature resistance, good fireproof performance, low maintenance cost and the like. Therefore, the concrete tower drum has good applicability.

The traditional wind power mixing tower is mostly composed of a cast-in-place tower barrel. However, the adoption of the cast-in-place tower barrel can cause the problems of long construction period, difficult guarantee of construction quality in winter and the like. And the adoption of the precast concrete tower barrel has the advantages of shortening the construction period and solving the problem of difficult construction in winter.

The existing prefabricated concrete tower barrel connection can cause the problems of insufficient rigidity of connection parts, difficult hole alignment of bolts, insufficient shock resistance and the like. Therefore, the existing wind power mixing tower has defects in structure and use and needs to be improved. The creation of a tower connecting piece remains one of the currently important research and development issues.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to promote connection position rigidity, reduce the degree of difficulty to the hole, promote fatigue resistance, for solving above problem, the utility model provides an adopt wind-powered electricity generation that bolt anti-drawing formula is connected to mix prefabricated tower section of thick bamboo and connecting piece in tower.

The purpose of the utility model is realized with the following mode:

the wind power hybrid tower prefabricated tower cylinder connecting piece comprises a high-strength bolt, a high-strength unthreaded sleeve, a high-strength threaded sleeve, a low-yield-point deformation steel sleeve slightly longer than the high-strength unthreaded sleeve and a rigid backing plate, wherein the rigid backing plate is sleeved at the upper end of the high-strength bolt, the upper part of the high-strength bolt is connected with the high-strength unthreaded sleeve through a cold-extrusion low-yield-point deformation steel sleeve, and the lower part of the high-strength bolt is connected with the high-strength threaded sleeve through threads.

Preferably, both the high-strength unthreaded sleeve and the high-strength threaded sleeve are subjected to thermal refining.

Preferably, the high-strength bolt is a 10.9-grade or higher high-strength bolt.

Preferably, the yield strength of the low yield point deformed steel sleeve is less than 176 MPa.

Preferably, the inner cavity of the high-strength threaded sleeve is metric threads.

Preferably, the diameter of the low-yield-point deformed steel sleeve is slightly smaller than that of the high-strength unthreaded sleeve, and the diameter of the high-strength bolt is slightly smaller than that of the low-yield-point deformed steel sleeve.

Preferably, the high-strength threaded sleeve diameter is equal to the high-strength bolt diameter.

Preferably, the metric thread section of the high-strength threaded sleeve is in threaded connection with the high-strength bolt.

A wind power hybrid tower prefabricated tower cylinder adopting bolt anti-pulling connection comprises a concrete prefabricated part flat plate end and an arc-shaped plate section, the high-strength threaded sleeve is embedded in the flat plate end of the concrete prefabricated part and welded on the embedded steel plate, the high-strength unthreaded sleeve is embedded in the arc-shaped plate section, sleeving a section of low-yield-point deformed steel sleeve which is longer than the high-strength unthreaded sleeve outside the high-strength bolt, padding a rigid gasket between a high-strength bolt nut and the low-yield-point deformed steel sleeve, penetrating the high-strength bolt and the low-yield-point deformed steel sleeve into the high-strength unthreaded sleeve together, screwing the thread of the high-strength bolt into the high-strength threaded sleeve, and under the extrusion of the rigid backing plate and the high-strength threaded sleeve, the low-yield-point deformed steel sleeve deforms in a yielding manner, and the internal gap of the high-strength non-threaded sleeve is filled, so that the connection between the flat plate end and the arc plate section of the concrete prefabricated part is realized.

The utility model discloses the beneficial effect of ability is:

(1) the utility model discloses bolt, nut, gasket, sleeve pipe etc. that adopt have ripe supply chain basis, can directly be based on current standard and standard batch production, or purchase in batches, and the cost is controlled.

(2) The utility model discloses the bolt diameter that adopts slightly is less than low yield point steel for reduce substantially the hole degree of difficulty.

(3) The utility model discloses a no threaded sleeve is filled to low yield point steel, and the restriction bolt removes the purpose that reaches the increase rigidity.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of a segment of the present invention;

FIG. 3 is a schematic top view of the connection assembly of the present invention;

the concrete slab comprises 1 arc concrete slab section, 2 concrete slab section, 3 connecting piece, 4 rigid backing plate, 5 high-strength unthreaded sleeve, 6 low yield point deformation steel sleeve, 7 high-strength bolt and 8 high-strength threaded sleeve.

Detailed Description

The invention will be further elucidated in detail with reference to the drawing.

As shown in attached

drawings

1 and 2, the wind power hybrid tower prefabricated tower cylinder connecting piece adopting the bolt pull-resistant connection comprises a high-strength bolt 7, a high-strength unthreaded sleeve 5, a high-strength threaded sleeve 8, a low-yield-point deformed steel sleeve 6 slightly longer than the high-strength unthreaded sleeve 5 and a rigid backing plate 4, wherein the rigid backing plate 4 is sleeved on the upper end of the high-strength bolt 7, the upper part of the high-strength bolt 7 is connected with the high-strength unthreaded sleeve 5 through the cold-extrusion low-yield-point deformed steel sleeve 6, and the lower part of the high-strength bolt 7 is in threaded connection with the high-strength threaded sleeve 8.

The high-strength unthreaded sleeve 5 and the high-strength threaded sleeve 8 are both subjected to quenching and tempering. The high-strength bolt 7 is a high-strength bolt of 10.9 grade or above. The yield strength of the low yield point deformed steel sleeve 6 is less than 176 MPa. The inner cavity of the high-strength threaded sleeve 8 is a metric thread. The diameter of the low yield point deformed steel sleeve 6 is slightly smaller than that of the high-strength unthreaded sleeve 5, and the diameter of the high-strength bolt 7 is slightly smaller than that of the low yield point deformed steel sleeve 6. The high-strength threaded sleeve 8 has a diameter equal to the high-strength bolt diameter 7. The metric thread section of the high-strength threaded sleeve 8 is in threaded connection with the high-strength bolt 7.

The fatigue performance of the connecting piece of the precast concrete tower barrel is required, the fatigue test is 150 MPa-300 MPa, and the damage does not occur after the stress cycle N is more than or equal to 2 multiplied by 106 times. The utility model provides an adopt wind-powered electricity generation to mix tower prefabricated tower section of thick bamboo of bolt tensile connection, pre-buried high strength threaded sleeve 8 in concrete prefabricated component flat plate end 2, with its welding on the buried steel board, convenient control, calibration sleeve angle and position. (in the arc plate section 1 pre-buried high-strength thread-free sleeve 5, high-strength thread-free sleeve 5 diameter greater than high-strength threaded sleeve 8 diameter, convenient to observe the hole, also for the perforation adjustment of the reserved space, sleeve exposed port all welded, pre-buried hole steel plate, dispersed stress, and prevent local damage, high-strength bolt 7 in the jacket a section slightly longer than high-strength thread-free sleeve 5 low yield point deformation steel sleeve 6, low yield point deformation steel sleeve 6 diameter slightly less than high-strength thread-free sleeve 5 diameter, ensure can be successfully inserted into high-strength thread-free sleeve 5, and have certain adjustment space, high-strength bolt nut and low yield point deformation steel sleeve 6 between the pad of a rigid gasket 4, high-strength bolt 7 and low yield point deformation steel sleeve 6 together penetrate the high-strength thread-free sleeve 5, bolt 7 high-strength thread into the flat plate section high-strength threaded sleeve 8, then tighten high-strength bolt 7 to apply pre-tightening force, under the extrusion of the rigid backing plate 4 and the high-strength threaded sleeve 8, the thin steel sleeve 6 with low yield point deformation firstly yields and deforms, the inner gap of the high-strength unthreaded sleeve 5 is filled, the swing of the screw rod is limited, and the bolt connection rigidity is increased. Finally, the screw cap is in close contact with the concrete surface steel plate, and the bolt reaches the target pre-tightening force. And after 24 hours, the loss of the pretightening force can be checked and detected through the tightening torque, so that the pretightening force can reach the standard.

The utility model discloses can simplify the construction operation, reduce the hole degree of difficulty, improve connection rigidity, solve the partly problem that current prefabricated component connects.

For those skilled in the art, the present invention is not limited to the details of the above embodiments, and therefore, modifications can be made without departing from the overall concept of the present invention, and the modifications are all included in the scope of the present invention.

Claims

1. The utility model provides an adopt wind-powered electricity generation to mix tower prefabricated tower section of thick bamboo connecting piece of bolt anti-pulling type connection, includes high strength bolt (7), high strength unthreaded sleeve (5), high strength threaded sleeve (8), be longer than low yield point deformation steel sleeve (6) of high strength unthreaded sleeve (5), rigidity backing plate (4) are established to high strength bolt (7) upper end cover, its characterized in that, high strength bolt (7) upper portion is connected through cold extrusion low yield point deformation steel sleeve (6) with high strength unthreaded sleeve (5), high strength bolt (7) lower part passes through threaded connection with high strength threaded sleeve (8).

2. The wind power hybrid tower prefabricated tower barrel connecting piece adopting bolt tensile connection according to claim 1, characterized in that: the high-strength bolt (7) is a high-strength bolt of 10.9 grade or above.

3. The wind power hybrid tower prefabricated tower barrel connecting piece adopting bolt tensile connection according to claim 1, characterized in that: the yield strength of the low-yield-point deformed steel sleeve (6) is less than 176 MPa.

4. The wind power hybrid tower prefabricated tower barrel connecting piece adopting bolt tensile connection according to claim 2, characterized in that: the inner cavity of the high-strength threaded sleeve (8) is a metric thread.

5. The wind power hybrid tower prefabricated tower barrel connecting piece adopting bolt tensile connection according to claim 1, characterized in that: the diameter of the low yield point deformed steel sleeve (6) is smaller than that of the high-strength unthreaded sleeve (5), and the diameter of the high-strength bolt (7) is slightly smaller than that of the low yield point deformed steel sleeve (6).

6. The wind power hybrid tower prefabricated tower barrel connecting piece adopting bolt tensile connection according to claim 2, characterized in that: the diameter of the high-strength threaded sleeve (8) is equal to that of the high-strength bolt (7).

7. The wind power hybrid tower prefabricated tower barrel connecting piece adopting bolt tensile connection according to claim 4, is characterized in that: the metric thread section of the high-strength threaded sleeve (8) is in threaded connection with the high-strength bolt (7).

8. A wind power hybrid tower prefabricated tower cylinder adopting bolt tensile connection is characterized by comprising a concrete prefabricated part flat plate end (2) and an arc-shaped plate section (1), wherein a high-strength threaded sleeve (8) is pre-embedded in the concrete prefabricated part flat plate end (2), the high-strength threaded sleeve (8) is welded on an embedded steel plate, a high-strength unthreaded sleeve (5) is pre-embedded in the arc-shaped plate section (1), a low-yield-point deformed steel sleeve (6) which is longer than the high-strength unthreaded sleeve (5) is sleeved outside a high-strength bolt (7), a rigid gasket (4) is arranged between a high-strength bolt nut and the low-yield-point deformed steel sleeve (6), the high-strength bolt (7) and the low-yield-point deformed steel sleeve (6) penetrate into the unthreaded sleeve (5) together, the high-strength thread of the high-strength bolt (7) is screwed into the high-strength threaded sleeve (8), and under the extrusion of the rigid gasket (4) and the high-strength threaded sleeve (8), the low yield point deformed steel sleeve (6) is subjected to yield deformation, and the internal gap of the high-strength unthreaded sleeve (5) is filled, so that the connection between the concrete prefabricated part flat plate end (2) and the arc-shaped plate section (1) is realized.