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A tensioning apparatus

A technology of tensioning device and tensioner, which is applied in the direction of wrench, wrench, screwdriver, etc., can solve the problem that studs or bolts cannot be reused, and achieve the effect of minimizing downtime, avoiding expenses, and saving costs

Inactive Publication Date: 2014-09-24
FASTENERS SOLUTIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, if a mechanical structure contains a large number of bolted connections, the cost of tightening each one may be prohibitive, since a tensioner cannot be reused for subsequent studs or bolts without being removed from the bolted connection

Method used

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  • A tensioning apparatus
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Embodiment Construction

[0047] refer to figure 1 , shows a particularly preferred embodiment of the tensioning device 10 according to the invention. It should be known that figure 1 The arrangement shown is not drawn to scale, so this drawing is intended for illustrative purposes only, but this may represent any sample bolted connection.

[0048] The tensioning device 10 comprises a locking tool 12 adapted to engage a stud 14, a movable bridge member 16 arranged to surround or cover the locking tool 14, and a movable actuator operable to actuate the locking tool 14 through the bridge member 16. Moving part 18.

[0049] Additionally, the tensioner 10 also includes a movable tensioning tool 20, in this case a nut-type multi-set bolt tensioner having the pitch circle diameter of a cap screw 22 (although in figure 1 Only two cap screws are shown).

[0050] like figure 1 As shown, the tensioner 10 is configured, in use, against a sample bolted connection 24 having respective adjoining flanges 24a and...

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PUM

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Abstract

The present invention provides an apparatus and kit for tensioning a stud in a bolted joint to a desired preload, the apparatus comprising a locking means adapted for engagement with the stud, a removable bridge member arranged to at least partially enclose the locking means and to receive the stud therethrough, a removable actuator operable to actuate the locking means through the bridge member and removable tensioning means configured to apply tension to a load bearing surface of the bridge member so as to transfer tension to the stud, such that the actuator is operable to lock the locking means when the desired preload in the stud is achieved. The invention has application in many industries, including hydropower, wind, gas and steam turbines, nuclear, metal manufacturing, mining, shipbuilding and oil & petrochemical.

Description

technical field [0001] The present invention relates to a tensioning device, in particular to a device and kit for tensioning studs and bolts in bolted connections. Background technique [0002] It is well known that if bolted connections are not properly tensioned or held together with the proper compression force or load, there is a chance that these connections will eventually fail or otherwise experience some form of mechanical fatigue. Therefore, if the bolted connection is not properly tensioned, it can potentially cause many mechanical problems. [0003] Many bolted connections are held together by studs, bolts, threaded rods, or shafts with two conventional nuts at either end, which are then tightened together to achieve the desired preload in the connection. However, one of the main problems associated with conventional bolt fastening techniques is that as the diameter of the stud increases, the torque required to tighten it increases exponentially as the cube of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B29/02
CPCB25B13/06B25B29/02B25B13/481B25B23/0035B25B21/004B25B21/005
Inventor 斯坦·西尼
Owner FASTENERS SOLUTIONS