CN2238485Y - High power reducing ratio tripping device - Google Patents

Abstract

The utility model relates to a high power reducing ratio tripping device, which is mainly composed of a bracket, a cam, a movable connecting rod, an electromagnet, an oblique panel, a lever, a trip latch, a middle roller and a movable four-connecting rod, etc. The high power reducing ratio tripping device can utilizes the force balance of tripping members to realize stable closing, and the force balance is broken when in opening action, so each tripping member can rotate along a torque to drive the four connecting rods to glide downwards, therefore, the utility model realizes a switching-off action. The utility model has the advantages of high force reducing ratio, exact, sensitive and reliable action, simple structure, compact conformation, few parts and convenient maintenance.

Description

The high power reducing ratio release

The utility model relates to a kind of substation equipment, is meant a kind of transformer station's release with high power reducing ratio especially.

At present; transformer station, large-scale switchgear house; in order to protect the safety of transmission facility, circuit; all is furnished with release at the vacuum circuit-breaker of transformer station, switchgear house high-pressure side; purpose be export the circuit of an end or load in low pressure in case transship, fault such as short circuit, cause transmission of electricity, feeder line current rush, and then when understanding damaged line equipment and personal safety; the vacuum circuit-breaker of high-pressure side is under the effect of release, and separating brake disconnects high-tension distributing line.And the problem that existing release exists is: be divided into 1 to 2 grade and subtract the power dropout, complex structure is broken poor reliability, the time of breaking is long, the resetting device complexity, and caused the vacuum tube lost of life of vacuum circuit-breaker, need often to change to adjust, for the work of whole change distribution is made troubles.

The purpose of this utility model be to overcome the deficiencies in the prior art and provide a kind of have simple in structure, action accurately and reliably, the release of high power reducing ratio.

The purpose of this utility model is achieved in that mainly to be made up of support, cam, movable rod, electromagnet, skewback, lever, dropout pallet mediate roller, movable four connecting rods etc., it is characterized in that: the two ends fixed axis of movable four connecting rods is worn pin and is fixed on the support, be connected with movable rod on the roller of first swing arm, second swing arm contacts with the cam radius smallest point at gate-dividing state with roller between the 3rd swing arm; Contact with the cam radius maximum point in "on" position, cam is worn pin and is fixed on the support, and have a ratchet of placing restrictions on rotation direction, cam one end is connected with energy-stored spring, lever is fixed on the support with the concentric pin of wearing of skewback, skewback is one trapezoidal, the corner, upper right side has an inclined-plane to contact with roller between the 3rd swing arm and the 4th swing arm, the lever left side is provided with wears pin and is fixed on dropout pallet on the support, the right-hand narrow end of dropout pallet withstands on lever left groove place, left upper end is withstood and is worn pin and be fixed on mediate roller on the support, the mediate roller right-hand member withstands on the skewback left end, and its left end is provided with the hand tripping handle, and the skewback lower right is an inclined-plane, electromagnet is fixed on the support, and its push rod is above close lever.

Advantage of the present utility model is: it is big that release subtracts force rate, and power that need only be very little just can be finished the dropout separating brake, and action is accurate, sensitive, reliable, and simple in structure, compact, part is few, assembling is easy to maintenance.

Fig. 1 is the utility model gate-dividing state figure.

Fig. 2 is the utility model "on" position figure.

Fig. 3 is the utility model separating brake process status figure.

Fig. 4 is the stressed photo serieses of each parts of the utility model.

Below in conjunction with drawings and Examples the utility model is done into one explanation.

As shown in Figure 1, two fixed axis 31 of four connecting rods 41,71 wear pin respectively is fixed on the support, wearing pin with roller 42 between first swing arm 3 and second swing arm 4 is connected, be connected with movable rod 2 on it, draw together connecting rod 2 other ends and be connected to vacuum circuit-breaker disjunction lever (do not omit among the figure and draw), wearing pin with roller 61 between second swing arm 4 and the 3rd swing arm 6 is connected, under gate-dividing state, roller 61 contacts with the minimum radius point of cam 1, cam 1 is to wear pin by pin 101 to be fixed on the support, and controlled by energy-stored spring, also have ratchet and control its rotation direction, (do not omit among the figure and draw); Wear pin with roller between the 3rd swing arm 6 and the 4th swing arm 8 and be connected, the other end of the 4th swing arm 8 is fixing with pin 71 axle on support.The below of four connecting rods 41 is to subtract power dropout parts, is combined by lever 10, skewback 9, middle pallet 11, mediate roller 13, and wherein, lever 10 is fixed on the support with the skewback 9 concentric pins of wearing, and is positioned at roller 81 lower lefts; The right-hand member of lever 10 is positioned at the below of the push rod 121 of electromagnet 12, and left end is established a groove 110, and half garden projection 111 is established in the groove top, skewback 9 is one trapezoidal, the corner, upper right side is provided with an inclined-plane 91, and this inclined-plane 91 contacts with roller 81, and withstands roller 81 and do not move downward; Lever 10 left sides are provided with wears pin and is fixed on dropout pallet 11 on the support, the right-hand member of dropout pallet 11 is a narrow end 112, and the embedding that matches with the groove 110 of lever 10, left end be one raise up trapezoidal 113, upwards withstand the lower left circular arc portion 131 of mediate roller, mediate roller 13 also is to wear pin to be fixed on the support, and its right end below is an inclined-plane 132, and mediate roller 13 is withstood skewback 9 to the right; Also be provided with electromagnet 12 on the support, it gets electronic work and promotes push rod 121 bump lever 10 downwards.

As shown in Figure 2, when closing a floodgate, the cam 1 of release rotates under the effect of energy-stored spring, rotate the roller 61 that promotes four connecting rods 41 when its maximum radius point, then drive other two rollers 42,81 and reach the dead point to the right, roller 61 drives movable rod 2 and rises, and drives vacuum circuit-breaker and closes a floodgate (not marking among the figure); This moments four, connecting rods 41 tended to vertical configurations, strength supports by the inclined-plane 91 of the skewback 9 of roller 81 belows, skewback 9 withstands and can not rotate owing to mediate roller 13 again, and mediate roller 13 is withstood owing to trapezoidal protruding 113 of dropout pallet 11, also can't rotate, the right-hand member 112 of dropout pallet 11 is located in the groove 110 of lever 10, also can't rotate; And lever 10 is to be in poised state when push rod 121 does not clash into, so release keeps a stable state behind combined floodgate.

When separating brake; Its process as shown in Figure 3, release electromagnet 12 gets electronic work, push rod 121 is the right-hand member of bump lever 10 downwards, lever 10 disequilibriums serve as that axle clockwise rotates downwards with impact to wear the pin place, move on the left end groove 110, move on the right narrow end 112 of drive dropout pallet 11, dropout pallet 11 is axially gone up to rotate counterclockwise to wear the pin place, the support that its trapezoidal lug boss 113 is decontroled middle roller 13, cause mediate roller 13 axially to go up to rotate counterclockwise to wear the pin place, withstand the part of skewback 9 when closing a floodgate, skewback 9 rotates left in the counterclockwise direction, and whole dropout parts have lost the dynamic balance when closing a floodgate, the downslide of roller 81 drives each roller action on four connecting rods 41, the maximum radius point of face cam 1 this moment rises, moves downward the destruction dead point on four connecting rods 41 and causes gate-dividing state, as shown in Figure 1.

The left end of mediate roller is provided with hand tripping handle 18, during use, withstands to the right, and the balance of broken ring mediate roller is implemented manual brake separating and threaded off.

Characteristics of the present utility model are high power reducing ratios, mainly be to have adopted to have the equilibrium of forces principle, as shown in Figure 4, dropout action actuated element lever 10 skewbacks 9, dropout pallet 11 mediate roller 13 are on separately the equilibrium of forces position mutually, after separating brake action beginning, the corresponding balance of breaking separately of each parts, lever 10 is clockwise rotated downwards by push rod 121 downward impacts, its left end upwards rotates along moment, the right-hand member 112 that drives dropout pallet 11 upwards rotates counterclockwise, its left end rotates to lower edge moment, bleeds off the support force to middle roller 13, causes mediate roller 13 to lose support, left end rotates counterclockwise downwards, rotate and to cause mediate roller 13 right-hand members to lift simultaneously, cause skewback 9 to lose the support on the left side, under the action of gravity of roller 81, be rotated counterclockwise left, 91 angle θ's roller 81 glides along the inclined-plane, has destroyed the balance of four connecting rods 41, and then causes movable rod 2 to drive breaker open operations.Because action all is to break under the equilibrium of forces, rotate along the moment direction and to cause, so the strength of separating brake has subtracted power, the power of separating brake is very little, has reached the purpose of high power reducing ratio.

Claims (1)

1, a kind of high power reducing ratio release, mainly form by support, cam, movable rod, electromagnet, skewback, lever, dropout pallet, mediate roller, movable four connecting rods etc., it is characterized in that: the two ends fixed axis of movable four connecting rods is worn pin and is fixed on the support, be connected with movable rod on the roller of first swing arm, second swing arm contacts with the cam radius smallest point at gate-dividing state with roller between the 3rd swing arm; Contact with the cam radius maximum point in "on" position, cam is worn pin and is fixed on the support, and have a ratchet of placing restrictions on rotation direction, cam one end is connected with energy-stored spring, lever is fixed on the support with the concentric pin of wearing of skewback, skewback is one trapezoidal, the corner, upper right side has an inclined-plane to contact with roller between the 3rd swing arm and the 4th swing arm, the lever left side is provided with wears pin and is fixed on dropout pallet on the support, the right-hand narrow end of dropout pallet withstands on lever left groove place, left upper end is withstood and is worn pin and be fixed on mediate roller on the support, the right-hand member of mediate roller withstands on the skewback left end, and left end is provided with the hand tripping handle, and the skewback lower right is an inclined-plane, electromagnet is fixed on the support, and its push rod is above close lever.

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