Power-off protection system for loosening of foundation bolts of hoisting equipment
A technology of foundation bolts and lifting equipment, which is applied in the direction of automatic disconnection emergency protection devices, cranes, emergency protection circuit devices, etc., can solve problems such as loose foundation bolts, equipment collapse and overturning, mass casualties and mass injuries, etc. Achieve the effect of reducing the probability of collapse accidents, reducing casualties and losses, and improving safety
Pending Publication Date: 2022-01-14
陆锐
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Problems solved by technology
However, in recent years, due to problems such as improper installation and use of foundation bolts, there are not a few accidents in which lifting equipment collapses due to foundation bolts, because the foundation bolts are loose and not fastened, or because the foundation bolts are found to be broken and continue to be used, the equipment collapses and overturns Accidents occur frequently, resulting in sudden major safety accidents involving mass casualties
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[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.
[0016] combine figure 1 and figure 2 As shown, a power-off protection system for loose foundation bolts of lifting equipment, including a bolt washer 1 arranged on each foundation bolt, a push switch 3, an AC contactor 2 with a coil voltage of 24V, a relay 7, and a control circuit 5 And control electric box etc.
[0017] Among them, there is a hole on the above-mentioned bolt gasket 1, and an automatic reset push switch 3 is arranged in the hole. When the foundation bolt is loose or broken, the push switch 3 automatically resets, and the push switch 3 is connected to an AC contactor through the control circuit 5. 2. The configuration of the push switch 3 is...
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The invention discloses a power-off protection system for loosening of foundation bolts of hoisting equipment, and relates to the technical field of power supply control of the hoisting equipment. The power-off protection system comprises bolt gaskets, a hole is formed in each bolt gasket, and an automatic reset push switch is arranged in each hole; when the foundation bolts are loosened or fractured, the push switches can automatically reset; the push switches are connected with and control an alternating current contactor with 24V coil voltage; a control electric box is additionally arranged on a power supply line of the hoisting equipment, a transformer is arranged in the control electric box, and the transformer is used for transforming 380V voltage into 24V voltage for control; a power supply inlet wire of the hoisting equipment is connected to a wire inlet end of the alternating current contactor, and a wire outlet end of the alternating current contactor supplies power to the hoisting equipment; and the bolt gaskets are arranged on the foundation bolts respectively, and a control line is connected with the push switches on the bolt gaskets in series. By means of the power-off protection system, the power supply of the hoisting equipment can be cut off in time after the foundation bolts of the hoisting equipment are loosened, and the operation of the equipment is stopped, so that the probability of collapse accidents of the hoisting equipment is reduced.
Description
technical field [0001] The invention relates to the technical field of power supply control of lifting equipment, in particular to a power-off protection system for loose foundation bolts of lifting equipment. Background technique [0002] With the development of cities and the increase of high-rise buildings, the application of tower cranes is becoming more and more extensive. However, in recent years, due to problems such as improper installation and use of foundation bolts, there are not a few accidents in which lifting equipment collapses due to foundation bolts, because the foundation bolts are loose and not fastened, or because the foundation bolts are found to be broken and continue to be used, the equipment collapses and overturns Accidents occur frequently, resulting in sudden major safety accidents involving mass casualties. In order to avoid the recurrence of such accidents, it is necessary for us to conduct in-depth research on the foundation bolts of lifting eq...
Claims
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IPC IPC(8): B66C23/88B66C13/22B66C23/62H02H5/10
CPCB66C23/88B66C13/22B66C23/62H02H5/10
Inventor 陆锐陆峰俞兴伍
Owner 陆锐
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