CN212429481U

CN212429481U - High-strength bolt connection pair for wind power

Info

Publication number: CN212429481U
Application number: CN202021167097.2U
Authority: CN
Inventors: 顾青丽; 王永洁; 李晨晖
Original assignee: Shanghai Shenguang High Strength Bolts Co ltd
Current assignee: Shanghai Shenguang High Strength Bolts Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-01-29
Anticipated expiration: 2030-06-22

Abstract

The utility model provides a high strength bolted connection is vice for wind-powered electricity generation, it including: bolts, nuts, washers, and clamps. The outer peripheral surface of the washer is provided with a pair of clamping surfaces, and the washer is sleeved on the bolt and pressed between the nut and the external fixing piece. The fixture comprises a fixture groove part and a reaction arm. The clamping groove part is fixed at one end of the reaction arm and provided with a clamping groove, the opposite inner wall of the clamping groove is abutted against the clamping surface, and the thickness of the clamping groove part is smaller than that of the gasket. Can avoid the packing ring to follow through with fixture and packing ring cooperation in-process of screwing up the bolt to make vice torque coefficient value that reaches the requirement of high strength bolted connection.

Description

High-strength bolt connection pair for wind power

Technical Field

The utility model relates to a high strength bolted connection is vice for wind-powered electricity generation.

Background

At present, the mainstream construction mode of the high-strength bolt connection pair in the wind power industry is a torque method, and the adopted surface treatment is dacromet. However, the dacromet coating has a torque coefficient not less than 0.2, is unstable and cannot meet construction requirements, so that lubricating grease is required to be applied in actual application. The grease is half-coated in the early stage, namely only the thread part is coated. The advantages of this approach are: can obtain higher torque coefficient, accord with GB/T50205 steel construction engineering construction quality acceptance criteria, require to the torque coefficient value of high strength fastener connection pair: 0.11 to 0.15. The problems are as follows: a. the friction coefficients of the two surfaces of the washer are not greatly different, and when the nut is rotated, the washer is easy to follow up rotation, so that the torque coefficient is deviated from the target requirement. b. Construction workers in the construction site are not high in quality, and lubricating grease is stained on the gasket when being smeared, so that the actual torque coefficient of the gasket is far lower than the target requirement. In order to correct the problems, a full smearing mode is developed in the later period, namely, both the thread and the rotating surface of the connecting pair are smeared, and the acting surface of the bolt thread and the gasket is smeared generally. The mode can overcome the defect of half coating, but the torque coefficient is reduced by the mode, the general range is 0.075-0.12, the lower torque coefficient is easy to cause the connection pair to slip, and the connection pair rotates after being installed for a period of time, so that the fastening is failed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a high strength bolted connection is vice for overcoming the defect that the high strength bolted connection is vice to be difficult to reach the torque coefficient value requirement among the prior art.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

the utility model provides a high strength bolted connection is vice for wind-powered electricity generation which characterized in that, it is including:

a bolt;

a nut;

the outer peripheral surface of the washer is provided with a pair of clamping surfaces, and the washer is sleeved on the bolt and pressed between the nut and the external fixing piece;

the clamping device comprises a clamping groove part and a reaction arm, the clamping groove part is fixed at one end of the reaction arm, the clamping groove part is provided with a clamping groove, the opposite inner wall in the clamping groove is abutted against the clamping surface, and the thickness of the clamping groove part is smaller than that of the gasket.

Preferably, the holding surfaces are a pair of planes parallel to each other.

Preferably, the width between the clamping surfaces is equal to the width of the opposite sides of the bolt.

Preferably, a handle is vertically fixed to one end of the counter arm, which is far away from the clamping groove portion, and the extending direction of the handle is parallel to the axial direction of the bolt.

Preferably, the gasket is made using a stamping process.

On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.

The utility model discloses an actively advance the effect and lie in: can avoid the packing ring to follow through with fixture and packing ring cooperation in-process of screwing up the bolt to make vice torque coefficient value that reaches the requirement of high strength bolted connection.

Drawings

Fig. 1 is a schematic structural diagram of a high-strength bolt connection pair for wind power connected to a fixing member according to a preferred embodiment of the present invention.

Fig. 2 is a schematic structural view of the clamp and the washer according to the preferred embodiment of the present invention.

Fig. 3 is a side view of a clamp according to a preferred embodiment of the present invention.

Description of reference numerals:

bolt 100

Nut 200

Gasket 300

Retaining surface 310

Fixture 400

Slot part 410

Card slot 411

Reaction arm 420

Handle 430

Fixing member 500

Detailed Description

The present invention will be more clearly and completely described below with reference to the accompanying drawings.

Fig. 1 shows a high-strength bolt connection pair for wind power, which includes: bolt 100, nut 200, washer 300, and clamp 400. The washer 300 has a pair of catching surfaces 310 on the outer circumferential surface thereof, and the washer 300 is fitted over the bolt 100 and pressed between the nut 200 and the outer fixing member 500. Fixture 400 includes a fixture portion 410 and a reaction arm 420. The slot portion 410 is fixed at one end of the reaction arm 420, the slot portion 410 has a slot 411, opposite inner walls of the slot 411 abut against the retaining surface 310, and the thickness of the slot portion 410 is smaller than that of the gasket 300.

When the high-strength bolt connection pair is used for connecting the fixing piece 500 in wind power, the steps are as follows: pre-coating lubricating grease on the internal threads of the nut 200, and coating the lubricating grease from the steel seal end, wherein the coating length is 3/4; inserting bolt 100 into the connecting hole of fixing member 500, fitting washer 300 over bolt 100, and screwing the other end of nut 200 to bolt 100 while facing washer 300; as will be appreciated with reference to fig. 2, to prevent the washer 300 from following during rotation of the nut 200, the retaining groove 411 of the fixture 400 is retained on the washer 300, and the reaction arm 420 is retained on the reaction arm or tower wall edge of an adjacent bolt or hydraulic torque wrench until the nut 200 is fully tightened. The thickness of chuck segment 410 is less than the thickness of washer 300 to ensure that chuck 400 does not interfere with tightening of nut 200. In other embodiments, the grease application may be done in advance at the factory, thereby avoiding inconsistent application quality during field operations.

In order to facilitate the gasket 300 and the slot 411 to cooperate with each other, in the present embodiment, the clamping surfaces 310 are a pair of planes parallel to each other.

In practical applications, both the best anti-loosening effect between the washer 300 and the nut 200 and the interference between the washers 300 of adjacent bolts 100 are ensured, in the embodiment, the width between the clamping surfaces 310 is equal to the width of the opposite sides of the bolt 100.

As shown in fig. 3, in order to fix the reaction arm 420 better, a grip 430 is fixed perpendicularly to one end of the reaction arm 420 far from the slot 410, and the extending direction of the grip 430 is parallel to the axial direction of the bolt 100. In some confined installation environments, the use of the grip 430 may be more convenient for securing the reaction arm 420.

In addition, the gasket 300 is manufactured by a stamping process, and additional cost is not increased.

Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. The utility model provides a high strength bolted connection is vice for wind-powered electricity generation which characterized in that, it is including:

a bolt;

a nut;

2. The high-strength bolt connection pair for wind power as claimed in claim 1, wherein the clamping surfaces are a pair of planes parallel to each other.

3. The high-strength bolt connection pair for wind power as claimed in claim 2, wherein the width between the holding surfaces is equal to the width of opposite sides of the bolt.

4. The high-strength bolt connection pair for wind power as claimed in claim 1, wherein a handle is vertically fixed to one end of the reaction arm away from the slot portion, and the extending direction of the handle is parallel to the axial direction of the bolt.

5. The high-strength bolt connection pair for wind power as claimed in claim 1, wherein the washer is manufactured by a stamping process.