CN2540679Y - Transmmission and trip device - Google Patents

Abstract

Provided is a driving and disengaging device, which is used in a spring actuating mechanism of a SF6 high-pressure circuit breaker with high power, wherein a driving device is composed of a set of plane link mechanisms which includes two breaking detents and two switching-in detents which are supported on a disengaging device, and actions of switching-in and breaking are c controlled by an electromagnet. The utility model has the advantages of simple mechanism, reasonable arrangement and smaller vibration generated in the actuating process, thereby the utility model is capable of being used in the SF6 high-pressure circuit breaker with high power, and the utility model has better working performance and higher dependability.

Description

Transmission and trip gear

Technical field

The utility model belongs to a kind of electric machinery, transmits the transmission and the trip gear of energy and control branch, feed motion in particularly a kind of high-voltage breaker spring operating mechanism.

Background technology

Transmission device in the high-voltage breaker operation mechanism of present domestic use roughly has four classes: 1, pneumatic operating mechanism.2, hydraulic actuating mechanism.3, spring hydraulic control mechanism.4, spring operating mechanism.Because first three plants the existence than problems such as height of transmission structures complexity, unavoidable leakage of oil, gas leak phenomenon and the operating cost of being in operation and failure rate, so most of insider relatively admits spring operating mechanism.Therefore existing in recent years multiple spring operating mechanism is come out one after another.Though its structure is had nothing in common with each other, but all used the plane disc cam mechanism in their transmission device jointly, the transmission device of present this plane disc cam structure all is to use on the operating mechanism of lower-wattage circuit breaker.

Problem for the design and use of transmission device in the spring operating mechanism of the primary cut-out of high-power (more than the 8000J) is never effectively solved.Because the moving contact total kilometres of powerful SF6 primary cut-out are more than 200mm, the speed of its motion is calculated with millisecond.Suddenly rise in the motion process of all standing at operating mechanism, its acceleration is bordering on infinity.And the transmission device of cam-type moves with so high speed because its quality is big, and the inertia force that is produced is very big.Finally be delivered on the frame through relevant kinematic pair, form huge vibration, mechanism's job insecurity, each moving component wearing and tearing are aggravated, even cause serious consequences such as the damage of mechanical part and misoperation.In addition, because the characteristic of plane disc cam mechanism has determined it to be difficult in the higher pair contact position guarantee good lubricating that its specific pressure is bigger again, so easy to wear.In order to guarantee that operating mechanism has necessary useful life, makes that the transferring power of cam-type spring operating mechanism can not be excessive, so it is not suitable for using in the operating mechanism of powerful primary cut-out.

In addition, in the transmission device of existing spring operating mechanism, reduce tripping force and generally adopt three grades of dropout modes that subtract power for what try one's best.This makes the structure more complicated of tripping mechanism, and the response time of dropout is elongated (generally more than 30ms), and the sensitivity of threading off is produced adverse influence.

In sum, existing spring operating mechanism all is further limited in the scope of little operating work.Operating work big (more than the 8000J) with the arc extinguishing formula of calming the anger SF6 primary cut-out of good arc extinguishing function, matching used spring operating mechanism was not with it not still met the report of inside and outside development at present.

Summary of the invention

The purpose of this utility model provides transmission and the trip gear in a kind of novel spring operating mechanism, it can overcome existing shortcoming in the prior art, vibration and inertia force etc. can be reduced in the scope of certain permission, can be applied to the primary cut-out of high-power (more than the 5000-14000J), and have reliable service behaviour, can reduce the maintenance workload of equipment simultaneously.

The purpose of this utility model is achieved in that it is made up of transmission device and trip gear, it is characterized in that in transmission device connecting lever 29 by Bearing Installation on the main shaft 10 that is fixed on the body, the upper end of connecting lever 29 is articulated on the combined floodgate accumulator, the lower end is hinged by the middle part of one group of connecting plate and pallet 36, one end of pallet 36 is hinged on the fixed axis, the other end is a free end, is supported by Sub-gate release device; Connecting lever 18 is fixedly mounted on the output shaft, the connecting lever 14 that is connected with the primary cut-out pull bar also is installed on the output shaft, one end of connecting lever 18 is connected with the separating brake accumulator, connecting rod 17 and pressure-bearing bar 30 are hinged by locking shaft 16, the end of connecting rod 17 is hinged on the connecting lever 18, and the end of pressure-bearing bar 30 is installed on the bearing pin on the connecting lever 29 by chute, connecting rod 21 also is housed on the locking shaft 16, the other end of connecting rod 21 is hinged on the V-arrangement pallet 20, the bottom supporting of V-arrangement pallet is on the combined floodgate trip gear, and its top one side is hinged on the fixed axis, opposite side and spring 4 are connected; The mechanical brake that has a locking shaft slideway be positioned at locking shaft below, its end is hinged on the frame, the other end is connected on the connecting lever 18 by spring, has the locking slideway on the mechanical brake, the locking cambered surface is arranged at its top.

Trip gear of the present utility model comprises making electromagnet and tripping electromagnet, on the moving iron core of each electromagnet, connect a lance, below electromagnet, be connected with locating piece, be articulated in L shaped separating brake pallet on the body and combined floodgate pallet lay respectively at tripping electromagnet and making electromagnet below, the end of its horizon bar is connected by extension spring with electromagnet.

In order further to reduce to vibrate and inertia force during component movement, the planar linkage in the utility model transmission device adopts the clamp region of symmetrical expression.

Under the prerequisite that guarantees the primary cut-out movement velocity, the movement velocity of actuated element is reduced, to reduce impact value, the length of power transmission rod member of the present utility model (connecting lever 18,29) and executive component (connecting lever 14) gets 1: 2-3.

The utility model is reasonably handled the relation between each minute function from whole angle.The task of transmission mechanism be the energy efficient rate of accumulator pass to the pull bar of SF6 primary cut-out, make it make the action of divide-shut brake.Feed motion of the present utility model only comes power transmission with the connecting rod (connecting rod 17 and 30) of a band movable joint, the separating brake action is then realized by the connecting lever on the separating brake accumulator direct pull output shaft 18, make the number of spare parts of high-speed motion reach minimum, vibration and impact and also responsively to be reduced to minimum degree, this is one of the utility model major reason that can be used in powerful primary cut-out and dependable performance.For reaching best result of use, the utility model has also been taked following technical measures, comprising 1, realize that by the mass distribution of adjusting planar linkage mechanism its inertia force is bordering on balance, simultaneously the setting of dynamical element is carried out the complex optimum balance of inertia force, its vibrations that cause are further reduced.2, under the prerequisite of device movement velocity, the movement velocity of actuated element is reduced, to reduce impact value, the length of power transmission rod member (connecting lever 18,29) and executive component (connecting lever 14) is got proper proportion.3, main shaft and body are connected, and bearing is installed between main shaft and connecting lever 18, the main shaft of big quality is moved without spin, thereby do not produce moment of inertia.4, dropout technology has significant effects for the performance of the operating mechanism of primary cut-out, and its sensitivity and reliability are most important.The minimum characteristic of making a concerted effort when trip gear of the present utility model utilizes the two bar cramp corner fittings straight angles in the rod member reinforcement characteristic is arranged the particular kind of relationship of rod member, make tripping force have only 360N, the response time of threading off had shortened half than originally, and the ability that reverse self-locking is arranged, any vibration can not make its false tripping, has higher sensitivity and reliability.In addition, because of the present utility model simple in structure, the vibration that produces during work is little, so the maintenance workload to equipment is significantly reduced, breakdown rate also is reduced.

Description of drawings

Fig. 1 is an integrally-built front view of the present utility model.

Fig. 2 a is that A among Fig. 1 is to view.

Fig. 2 b is that B among Fig. 2 a is to view.

Fig. 3 a is the front view of the branch gate assembly among Fig. 1.

Fig. 3 b is the end view of Fig. 3 a.

Fig. 3 c is the A-A cutaway view among Fig. 3 a.

Fig. 3 d is the B-B cutaway view among Fig. 3 a.

Fig. 3 e is the C-C cutaway view among Fig. 3 a.

Fig. 4 a is the front view of the combined floodgate assembly among Fig. 1.

Fig. 4 b is the end view of Fig. 4 a.

Fig. 4 c is the A-A cutaway view among Fig. 4 a.

Fig. 4 d is the B-B cutaway view among Fig. 4 a.

A among Fig. 5, b, c are the three-view diagrams of the mechanical brake 12 among Fig. 1.

Fig. 5 d is the scheme of installation of mechanical brake.

Fig. 6 a and Fig. 6 b are respectively the structural representations of separating brake pallet and combined floodgate pallet.

Fig. 7 the utility model position between each parts when gate-dividing state concerns schematic diagram.

Fig. 8 be when carrying out sub-switching operation between each parts the position concern schematic diagram.

Position when Fig. 9 is closing operation between each parts concerns schematic diagram.

Figure 10 is the state diagram of the utility model each parts when normal operation.

Embodiment

The utility model is described in more detail below in conjunction with embodiment and accompanying drawing thereof.

By shown in Figure 1, the planar linkage mechanism in the transmission device of present embodiment is by combined floodgate assembly 11 and divide gate assembly 2 to constitute.The detailed structure of dividing gate assembly 2 is by Fig. 1, Fig. 2 and shown in Figure 3, and connecting lever 18 is installed on the output shaft 3, and output shaft 3 is a hexagon, and connecting lever 18 is fixedlyed connected with output shaft.Also be fixed with connecting lever 14 on output shaft 3 simultaneously, connecting lever 14 is connected with the connecting rod of circuit breaker by bearing pin 15.The pin-and-hole of connecting lever 18 upper ends is connected with separating brake accumulator F by bearing pin 19.The pin-and-hole of its lower end is connected with connecting plate 17 by bearing pin, and the pin-and-hole of the left end pin-and-hole of connecting plate 21 and connecting plate 17 lower ends is hinged with locking shaft 16, and its right-hand member and V-arrangement pallet 20 are hinged.One end of V-arrangement pallet 20 is hinged on the body with bearing pin 25, the other end is equipped with extension spring minor axis 26 (Fig. 3 c), the two ends of minor axis 26 all have notch, respectively install one in each notch and are used to reset and the other end of 4, two extension springs 4 of extension spring of balance inertial force is fixed on the body respectively.The bottom of V-arrangement pallet is equipped with roller 23 by roller shaft 22, and needle roller 24 (Fig. 3 b) is housed between roller shaft 22 and roller 23.Extension spring minor axis 27 shown in Fig. 3 d is installed in the bottom of connecting lever 18, an extension spring 13 respectively is installed in the groove at extension spring minor axis two ends.The lower end of extension spring 13 is fixed among the axis hole k of mechanical brake 12 both sides, and the opposite side of mechanical brake 12 is installed in by semiaxis Z on the side plate of body 1 (as shown in Figure 5).Have inclined-plane slideway d on the mechanical brake, the upper end has arc locking cambered surface m.The concrete structure of combined floodgate assembly 11 as shown in Figure 4.Main shaft 10 is fixedly mounted on the frame 1, and connecting lever 29 is sleeved on the main shaft 10, between needle bearing 9 is housed.The upper end of connecting lever 29 is hinged with combined floodgate accumulator H with bearing pin 28, one end of its lower end and a bridge shape connecting plate 32 is hinged with bearing pin 37, the other end of bridge shape connecting plate 32 is hinged with two connecting plates 33 and 35 simultaneously by bearing pin 34, the other end of connecting plate 33 is rotationally connected with the axle 43 that is fixed on the frame 1, and the other end of connecting plate 35 is articulated in the middle part of pallet 36 with bearing pin 41, one jiao of pallet 36 is rotationally connected with fixed axis 42, and another angle is a free end.Free end at pallet 36 is equipped with roller shaft 38, and roller 39 is installed on the roller shaft, and needle roller 40 is housed between roller and roller shaft.Be connected with bearing pin 31 at the middle part of connecting lever 29.The bottom of pressure-bearing bar 30 has chute, is sleeved on the bearing pin 31, and pressure-bearing bar 30 can be moved up and down along bearing pin 31.The upper end of pressure-bearing bar 30 is hinged on the locking shaft 16.Transmission rod when pressure-bearing bar 30 and connecting rod 17 are combined floodgate.Trip gear as shown in Figure 1, wherein 5 is tripping electromagnets, the 6th, separating brake pallet, the 7th, making electromagnet, the 8th, combined floodgate pallet.The concrete structure of trip gear as seen from Figure 6.A striker 45 is connected respectively on the moving iron core of tripping electromagnet 5 and making electromagnet 7, below electromagnet, be fixed with a locating piece 46, L shaped separating brake pallet 6 and combined floodgate pallet 8 are hinged on the body, lay respectively at two electromagnet below, the last plane positioning of its horizon bar is on the plane of locating piece 46.The end of horizon bar links to each other with electromagnet by an extension spring 47, and the pole tip of combined floodgate pallet and separating brake pallet has the working face of convex, is used for supporting respectively in the course of the work the roller 23 and 39 on pallet 20 and pallet 36 free ends.When minute, making electromagnet get electric after, be connected in the lance 45 downward horizon bars that hit pallet on the moving iron core, it is clockwise rotated, and the circular arc working face of pallet vertical rod drives the roller rotation and breaks away from roller and makes pallet 20 and 36 break away from restriction, realizes branch, the action of closing a floodgate.

Can see by accompanying drawing, in order to make mass balance between each rod member, to reduce the vibration of motional inertia and generation, each rod member (as many rod members such as connecting lever 29,18, connecting rod 17,33, pallets 20,36) has adopted the structure of symmetrical clamping plate type in the transmission device of the present utility model.And the ratio of the arm of force of the arm of force of power transmission rod member (as connecting lever 18) and execution rod member (as connecting lever 14) is decided to be 1: 2-3.

Operation principle of the present utility model: 1, non operating state (as shown in Figure 7): when separating brake accumulator F and combined floodgate accumulator H were release condition, circuit breaker D was a gate-dividing state.The line of centres of connecting plate 17, pressure-bearing bar 30 two elements becomes less than 90 ° of angles, and locking shaft 16 breaks away from mechanical brake 12.Pallet 20 is subjected to the restriction of connecting plate 21, is in the state that breaks away from separating brake pallet 6, and spring 4 is elongated and energy storage simultaneously.Bridge shape connecting plate 32 and connecting plate 33 are subjected to the restriction of bearing pin 37 and 42, become folded state, and pallet 36 is in disengaged position with combined floodgate pallet 8.

2, combined floodgate set-up procedure (as shown in Figure 8): when combined floodgate accumulator H accepts the power that power bin (not providing among this figure) provides, the beginning energy storage, when moving upward, it is the center with main shaft 10 that bearing pin 28 drives connecting lever 29, turn clockwise 44.03 °, owing to the motion of bearing pin 37 drives bridge shape connecting rod 32 by opening gradually with the folded state of supporting connecting plate 33, make the bearing pin line of centres of two connecting plates be bordering on the straight angle, driving pallet 36 by bearing pin 34 by connecting plate 35 is that the center is rotated counterclockwise with axle 42, roller 39 on the pallet 36 rises, be attached in the vertical rod of combined floodgate pallet 8, and be lockable.Control element in the power bin can stop the energy storage of combined floodgate accumulator automatically at this moment.Meanwhile, because connecting lever 29 clockwise rotates, bearing pin 31 moves downward, and has liberated to the restriction of pressure-bearing bar 30 it to be moved down, and makes the connecting rod 17 and the line of centres of pressure-bearing bar 30 be bordering on straight line.By the tension of spring 4, driving pallet 20 be that the center rotates counterclockwise with axle 25, and roller 23 is risen, finally on the supporting cambered surface of separating brake pallet 6 and by locking.Each element was feed motion and got ready this moment.

3, closing operation (as shown in Figure 9): when making electromagnet 7 electric after, moving iron core drives the horizon bar of the lance 45 strike combined floodgate pallets 8 of lower end, make it clockwise rotate 4 ° of angles, release latch 36, connecting lever 29 is spurred by the combined floodgate accumulator and rotates counterclockwise 44.03 ° of angles rapidly, pressure-bearing bar 30, connecting plate 17 move on being promoted rapidly by bearing pin 31, drive connecting lever 18 and clockwise rotate 60 ° of angles, the connecting lever 14 that coexists with it on output shaft also turns over 60 ° of angles, by moving on the bearing pin 15 drive circuit breaker pull bars, make breaker closing.Locking shaft 16 this moment rises to the locking cambered surface along the slideway of mechanical brake 12 and is lockable, and finishes closing operation.When finishing closing operation, bearing pin 19 drives separating brake accumulator F and has finished thermal energy storage process, for sub-switching operation is got ready.After finishing closing operation, the control element of power bin can carry out energy storage to the combined floodgate accumulator immediately, makes transmission device of the present utility model be in normal operating condition shown in Figure 10, for sub-switching operation is got ready.

4, sub-switching operation (shown in Figure 8): when tripping electromagnet 5 electric after, lance 45 hits the horizon bar of separating brake pallet 6, make its clockwise rotate 4 ° and liberation pallet 20, connecting lever 18 is rotated counterclockwise under the tension of separating brake accumulator, drive the circuit breaker pull bar by the connecting lever coaxial 14, make breaker open operation with it.This moment the locking shaft 16 on the connecting plate 17 to drive mechanical brake 12 be the center with the semiaxis, rotate counterclockwise the locking cambered surface that breaks away from mechanical brake 12 after 45 °, finish the operation of separating brake.Under the tension of spring 4, pallet 20 rises simultaneously, and the roller 23 on it is pressed in again in the vertical rod of separating brake pallet 6, for closing operation is got ready.

Claims (4)

1, transmission and trip gear, it is made up of transmission device and trip gear, it is characterized in that in transmission device connecting lever 29 by Bearing Installation on the main shaft 10 that is fixed on the body, the upper end of connecting lever 29 is articulated on the combined floodgate accumulator, the lower end is hinged by the middle part of one group of connecting plate and pallet 36, one end of pallet 36 is hinged on the fixed axis, and the other end is a free end, is supported by Sub-gate release device; Connecting lever 18 is fixedly mounted on the output shaft, the connecting lever 14 that is connected with the primary cut-out pull bar also is installed on the output shaft, one end of connecting lever 18 is connected with the separating brake accumulator, connecting rod 17 and pressure-bearing bar 30 are hinged by locking shaft 16, the end of connecting rod 17 is hinged on the connecting lever 18, and the end of pressure-bearing bar 30 is installed on the bearing pin on the connecting lever 29 by chute, connecting rod 21 also is housed on the locking shaft 16, the other end of connecting rod 21 is hinged on the V-arrangement pallet 20, the bottom supporting of V-arrangement pallet is on the combined floodgate trip gear, and its top one side is hinged on the fixed axis, opposite side and spring 4 are connected; The mechanical brake that has a locking shaft slideway be positioned at locking shaft below, its end is hinged on the frame, the other end is connected on the connecting lever 18 by spring, has the locking slideway on the mechanical brake, the locking cambered surface is arranged at its top.

2, according to said transmission of claim 1 and trip gear, it is characterized in that trip gear comprises making electromagnet and tripping electromagnet, on the moving iron core of each electromagnet, connect a lance, below electromagnet, be connected with locating piece, be articulated in L shaped separating brake pallet on the body and combined floodgate pallet lay respectively at tripping electromagnet and making electromagnet below, the end of its horizon bar is connected by extension spring with electromagnet.

3,, it is characterized in that the clamp region of the planar linkage employing symmetrical expression in the transmission device according to said transmission of claim 1 and trip gear.

4,, it is characterized in that the power transmission rod member (connecting lever 18,29) in the transmission device and the length ratio of executive component (connecting lever 14) get 1: 2-3 according to said transmission of claim 1 and trip gear.

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