CN2295283Y

CN2295283Y - Combined shock-proof hammer

Info

Publication number: CN2295283Y
Application number: CN 96218707
Authority: CN
Inventors: 刘新; 李�瑞; 毛樟甫; 俞晓鸿; 包建强; 余虹云
Original assignee: HANGZHOU POWER SCHOOL
Current assignee: HANGZHOU POWER SCHOOL
Priority date: 1996-08-09
Filing date: 1996-08-09
Publication date: 1998-10-21
Anticipated expiration: 2006-08-09

Abstract

The utility model relates to a vibration damping hammer which can reduce the wind vibration of an overhead transmission line. The utility model is provided with a line clamp which is composed of a curved hook, a tongue plate and a curved surface fastener. The upper end of the line clamp can be fixed on an overhead transmission line, and the lower end of the line clamp is connected with a steel strand. Both ends of the steel strand are fixedly provided with L-shaped cast-iron hammer heads which are respectively arranged on the front and the rear sides of the steel strand to form an angle. The bottom of each hammer is provided with an additional ring head with a movable notch, or the additional ring heads are fixed by screws.

Description

Combined stockbridge damper

The utility model belongs to a kind of stockbridge damper that can alleviate the vibration of overhead transmission line wind-engaging.

Existing power transmission line is the StockBridge stockbridge damper basically, and its principal character is that a pair of cast iron tup that is hollow tubular is arranged.This stockbridge damper has the following disadvantages: 1. there was dampness in the air in the unreasonable structure, hollow hammer tube, and easily poly-foreign material make the easy corrosion of steel strand wire, and useful life is shorter than lead; 2. the character of the possibility of conductor vibration and vibration processes depends on several factors, as the diameter and the material of lead; The span of circuit and the tension force of lead; The height of hitch point, wind speed and the residing geographical environment of circuit etc.So the present stockbridge damper frequency narrow application range of using (two resonant frequency values are only arranged), the dangerous frequency range that occurs on can not sight path and adjusting.

The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of rational in infrastructure, is difficult for corrosion, and long service life and frequency response range are wide, the integrated combination stockbridge damper that can adjust flexibly again.

Technical solution of the present utility model is: have a upper end can be fixed on wire clamp on the overhead transmission line, wire clamp is by bent hook and hyoplastron, and the curved surface securing member is formed, the curved surface securing member is positioned at the opening part of the bent hook in top of hyoplastron, bent hook upper end is opening and sticks up shape, at center, warpage place one square hole is arranged, hyoplastron top tongue inserts in the square hole of bent hook, hyoplastron bottom and bent hook middle part are affixed with bolt, the wire clamp lower end connects steel strand wire, the steel strand wire two ends are fixed with L shaped cast iron tup, and tup is arranged in the front and back side of steel strand wire, is a certain angle, one notch additional movable ring head is arranged at tup bottom, or with the fixing additional ring head of screw.

The utility model compared with prior art has rational in infrastructure, and weather-resistance is strong, long service life, and also the resonant frequency response scope is wide, can adjust flexibly again, is characteristics such as integrated combination.

Fig. 1 is a sectional structure chart of the present utility model.

Fig. 2 is the left view of Fig. 1.

Below in conjunction with accompanying drawing the utility model is described in detail.One wire clamp 2 is arranged, form by bent hook 8, hyoplastron 9 and curved surface securing member 11, curved surface securing member 11 is positioned at the opening part of the bent hook 8 in top of hyoplastron 9, bent hook 8 upper ends are opening and stick up shape, at center, warpage place one square hole is arranged, after lead is hooked in bent hook 8 upper ends, the top tongue of hyoplastron 9 is inserted in the square hole of bent hook 8, and with bolt that hyoplastron 9 bottoms and bent hook 8 middle parts are affixed.This moment, lead 1 was entangled, with curved surface securing member 11 wire clamp 2 and lead 1 was held out against fixingly again, and there is a circular hole bent hook 8 lower ends, can affixed steel strand wire 3, steel strand wire 3 two ends then are connected with L type cast iron tup 4, and two ends tup 4 is installed in the front and back side of steel strand wire 3, is a certain angle [alpha].Tup 8 is with a butt end and another elongated two cylindrical combining, and center, tubbiness position has the hole can affixed steel strand wire 3, and a notch 7 is arranged at bottom, elongated position, additional ring head 5 can be limited in by screw 6 and move in the notch 7 or be fixed in the notch 7 on the specified points.

The utility model utilizes the principle of energy balance design, when lead 1 produces vibration because of the wind effect, wire clamp 2 is with the together upper and lower vibration of lead 1, because the effect of inertia of tup 4 makes steel strand wire 3 two ends constantly crooked up and down, the damping action of tup 4 has reduced the wave amplitude of vibration, and the friction that produces between the distortion of steel strand wire 3 and strand has then consumed vibrational energy.Steel strand wire 3 bendings must be fierce more, the energy that is consumed also the more so that hearsay also descends for the energy of lead 1 with amplitude, the energy of stockbridge damper consumption also descends with amplitude, finally under the energy balance condition, with the vibration limiting of lead 1 to non-hazardous limit.

The utility model is considered the effect of lead wind-engaging and the complex situations vibrated, and tup 4 is arranged in the both sides, front and back of steel strand wire 3, is a certain angle.When lead 1 vibration, tup 4 will make steel strand wire 3 be subjected to the double action of moment of flexure and moment of torsion, thereby improve the weakening effect of stockbridge damper.Under symmetric case, can obtain three resonance frequencys.If 5 one-tenth asymmetric case of mobile additional ring head can obtain 5 resonance frequencys, far away more than existing stockbridge damper.

The utility model can obtain the weakening effect of the best according to overhead transmission line through the meteorological characteristics in area.

Combined stockbridge damper can be designed to serial model No., from omnibearing symmetric form to omnibearing asymmetric.

Claims

1. one kind can alleviate the stockbridge damper that the overhead transmission line wind-engaging vibrates, it is characterized in that having a upper end can be fixed on wire clamp on the overhead transmission line, wire clamp is by bent hook and hyoplastron, and the curved surface securing member is formed, the curved surface securing member is positioned at the opening part of the bent hook in top of hyoplastron, bent hook upper end is opening and sticks up shape, at center, warpage place one square hole is arranged, hyoplastron top tongue inserts in the square hole of bent hook, hyoplastron bottom and bent hook middle part are affixed with bolt, the wire clamp lower end connects steel strand wire, the steel strand wire two ends are fixed with L shaped cast iron tup, and tup is arranged in the front and back side of steel strand wire, is a certain angle.

2. stockbridge damper according to claim 1 is characterized in that a notch additional movable ring head is arranged at tup bottom, or with the fixing additional ring head of screw.