CN202034288U

CN202034288U - Knife switch of locking mechanism

Info

Publication number: CN202034288U
Application number: CN2011201383101U
Authority: CN
Inventors: 孙红梅
Original assignee: 孙红梅
Current assignee: Hangzhou Normal University
Priority date: 2011-04-29
Filing date: 2011-04-29
Publication date: 2011-11-09
Anticipated expiration: 2021-04-29

Abstract

The utility model belongs to the technical field of machinery, and relates to a knife switch, in particular to a knife switch of a locking mechanism, which solves the technical problems that a positioning pin is easy to loose and fall off after being used for a long time, the working state of the isolating knife switch cannot be guaranteed, the operation of a breaker and the knife switch cannot be unified, circuit opening and closing can easily occur in the presence of load current, and the like. The knife switch comprises a knife switch seat which is fixed on a substrate in a control cabinet, wherein a contact knife switch is hinged with the knife switch seat which is arranged in a circuit; at least one positioning pin which can lock the contact knife switch is penetrated into the knife switch seat; the knife switch is characterized in that: the substrate is provided with a locking member which can limit the positioning pin; a compression spring is arranged between the locking member and the right side of the substrate; the right side of the substrate is also hinged with a push plate which can press against the locking member. The knife switch has the advantages that: the opening and the closing of the locking member can be controlled through the opening and the closing of the breaker, so that the safety during use is enhanced; the contact knife switch can only be operated by disconnecting the breaker at first when required to be operated, so that the uniform operation of the breaker and the contact knife switch is guaranteed, and the potential safety hazard is avoided; and in addition, the mechanism has the advantages of readily available materials, simple structure and low production cost.

Description

A kind of blocking mechanism disconnecting link

Technical field

The utility model belongs to field of mechanical technique, relates to a kind of disconnecting link, especially a kind of blocking mechanism disconnecting link.

Background technology

Isolation switch is to use maximum a kind of electrical equipment in the high-voltage switch electric appliance, and the operation principle of itself and relatively simple for structure, but because use amount is big, functional reliability requires high is all bigger to the influence of design, foundation and the safe operation of electric substation, power plant.The main feature of isolation switch is no arc extinguishing ability, can only not have to divide under the situation of load current, close circuit; After main effect is separating brake, set up reliable clearance for insulation, the equipment or the circuit of needs maintenance separated with an obvious cut-off point with power supply, with the safety of assurance maintainer and equipment according to moving needs.Owing to after the long-term use of disconnecting link, the situation of loosening or automatic disconnection often occurs, cause circuit to disconnect, influence company's production and resident living.People are provided with an alignment pin on disconnecting link for this reason, prevent its unexpected disconnection or closure.

But the isolation switch that is provided with alignment pin at present all exists some problems: 1, the permanent use of alignment pin also occurs loosening easily and comes off, and can't guarantee the operating state of isolation switch; 2, circuit breaker and switch operation can't be unified, and appear at easily under the situation of load current to divide, close circuit, and when circuit breaker was closed, again with the disconnecting link closure, disconnecting link was easy to generate the safety that electric arc jeopardizes operating personnel.

Summary of the invention

The purpose of this utility model is the problems referred to above that exist at prior art, and a kind of high disconnecting link blocking mechanism of unification, security performance that can realize that disconnecting link is handled is provided.

The purpose of this utility model realizes by following technical proposal: a kind of blocking mechanism disconnecting link, comprise and be fixed on the blade base on the substrate in the control cubicle, be arranged on the blade base in the circuit and be hinged with contact knife, also be equipped with the alignment pin that at least one can lock contact knife on this blade base, it is characterized in that; Described substrate is provided with the latch fitting that can limit alignment pin, be provided with the compression spring between latch fitting and the substrate right side, this substrate right side also be hinged with can the roof pressure latch fitting push pedal, hinged pull bar in the push pedal, this pull bar other end is hinged on the eccentric position of main shaft outrigger shaft in the circuit breaker.

Earlier circuit is disconnected by circuit breaker, then that contact knife is closed or unclamp, increased the fail safe that disconnecting link uses, avoided contact knife when closure, to occur dangerous situations such as electric arc easily.After the long-time use of closed contact knife, always become flexible easily or disconnect, can not guarantee the unimpeded of circuit for a long time.And just can realize the closure that contact knife is permanent by above-mentioned alignment pin, avoid contact knife to skid off and the situation that causes circuit to disconnect.Though above-mentioned alignment pin can be realized stable the cooperating of contact knife and blade base, also there is loosening situation in alignment pin self.In the technical program, be hinged on the eccentric position of outrigger shaft, during the outrigger shaft rotation, just realized pull bar moving on horizontal level, and the opposite side of pull bar be connected with push pedal, has also just realized moving of push pedal by pull bar.Just with latch fitting jack-up to the left, latch fitting just can withstand alignment pin, avoids alignment pin to come off when push pedal acted directly on the latch fitting; When pull bar was pulled away from latch fitting with push pedal, latch fitting bounced back again under the effect of spring, and latch fitting also can't limit alignment pin.

Described blade base comprises the ceramic wafer that is arranged on the substrate, this ceramic wafer is provided with contact knife seat and following contact knife seat, described contact knife is hinged on the contact knife seat, following contact knife seat is provided with the cutter groove that can match with contact knife, also is provided with the plug-in strip lid that has through hole and cooperate with blade base on this blade base.

Described alignment pin is arranged in the plug-in strip lid.Alignment pin is arranged in the plug-in strip lid by the through hole in the plug-in strip lid, can prevent the contact knife dislocation.

Described latch fitting is the T type and by the insulating material manufacturing, this latch fitting roof pressure is in the alignment pin end.

Described push pedal is fan-shaped, and this push pedal is provided with several jointed shafts that also is fan-shaped array, and the scallop of push pedal leans at the latch fitting end face.After long-term use, if push pedal and latch fitting wearing and tearing is more serious, causes latch fitting to be shifted onto corresponding height, so that can't realize limiting the time spent of doing of alignment pin by push pedal, with being hinged and connected of left in pull bar and the push pedal, the compensation after just realizing wearing and tearing.

The scallop that described push pedal and latch fitting end face lean is connected with pushing block.

The utlity model has following advantage: owing to be provided with the situation that latch fitting has avoided alignment pin to come off in the utility model, thus stop the phenomenon that contact knife skids off from the cutter groove; In the technical program, be the keying of controlling latch fitting by the folding of circuit breaker, increased the fail safe when using; During contact knife, must earlier circuit breaker be disconnected and could implementing when needing operation, guarantee that circuit breaker and contact knife operate unification, avoid potential safety hazard; In addition, draw materials easy, simple in structure, low production cost of this mechanism.

Description of drawings

Fig. 1 is that master of the present utility model looks schematic diagram;

Fig. 2 is that schematic diagram is looked on a left side of the present utility model.

Among the figure, 1, substrate; 11, ceramic wafer; 111, go up the contact knife seat; 112, following contact knife seat; 2, blade base; 21, contact knife; 211, cutter groove; 22, alignment pin; 23, plug-in strip lid; 231, through hole; 3, latch fitting; 4, spring; 5, push pedal; 51, jointed shaft; 52, pushing block; 6, pull bar; 7, outrigger shaft.

Embodiment

Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to following examples.

As illustrated in fig. 1 and 2, a kind of blocking mechanism disconnecting link comprises being fixed on the blade base 2 on the substrate 1 in the control cubicle that blade base 2 comprises the ceramic wafer 11 that is arranged on the substrate 1, and ceramic wafer 11 is provided with contact knife seat 111 and following contact knife seat 112; Be hinged with contact knife 21 on the last contact knife seat 111, following contact knife seat 112 is provided with the cutter groove 211 that can match with contact knife 21.Also be equipped with at least one alignment pin that can lock contact knife 21 22 on the blade base 2, this alignment pin 22 is arranged in the plug-in strip lid 23 that has through hole 231 and can cooperate with blade base 2.Alignment pin 22 wears wherein by the through hole 231 in the plug-in strip lid 23, can prevent contact knife 21 dislocations.

Substrate 1 is provided with the latch fitting 3 that can limit alignment pin 22, and this latch fitting 3 is the T type and by the insulating material manufacturing, these latch fitting 3 roof pressures are in alignment pin 22 ends.Latch fitting 3 flexibly connects with substrate 1, is provided with compression spring 4 between the right side latch fitting 3 that connects and substrate 1, also be hinged with on substrate 1 right side can roof pressure latch fitting 3 right sides push pedal 5.This push pedal 5 is fan-shaped, and is provided with several jointed shafts that also is fan-shaped array 51, and the scallop energy roof pressure of push pedal 5 is at latch fitting 3 end faces, and the scallop that leans at push pedal 5 and latch fitting 3 end faces is connected with pushing block 52 usually.Realize opening latch fitting 3.

Push pedal 5 is hinged with pull bar 6 by jointed shaft 51, and pull bar 6 other ends are hinged on the eccentric position of main shaft outrigger shaft 7 in the circuit breaker; Be hinged on the eccentric position of outrigger shaft 7 by pull bar 6, during outrigger shaft 7 rotations, just realized pull bar 6 moving on horizontal level, and the opposite side of pull bar 6 be connected with push pedal 5, has also just realized moving of push pedal 5.Just latch fitting 3 is ejected to the left when push pedal 5 acts directly on the latch fitting 3, latch fitting 3 just can withstand alignment pin 22, avoids alignment pin 22 to come off; When pull bar 6 was pulled away from latch fitting 3 with push pedal 5, latch fitting 3 bounced back again under the effect of spring 4, and latch fitting 3 also can't limit alignment pin 22.In addition, after using for a long time, push pedal 5 and latch fitting 3 wearing and tearing cause latch fitting 3 to be shifted onto corresponding height by push pedal 5, so that can't realize limiting the time spent of doing of alignment pin 22, with right-hand being hinged and connected in pull bar 6 and the push pedal 5, and the compensation after just realizing wearing and tearing.

In the present embodiment, when outrigger shaft 7 is a main axis rotation when realizing the make position of circuit breaker, pull bar 6 just moves to the left, impels push pedal 5 roof pressures on latch fitting 3, and 3 of latch fittings can be realized the fixing of alignment pin 22.When outrigger shaft 7 is a main axis rotation when realizing the open position of circuit breaker, circuit also just is disconnected, pull bar 6 spurs push pedal 5 to the right, latch fitting 3 is under the situation that does not have push pedal 5 roof pressures, just under the effect of spring 4, withdraw, also just can't limit alignment pin 22, unload alignment pin 22 again and just can handle contact knife 21.Letter, under the situation of breaker closing, circuit is connected, and can't handle contact knife 21; Under the situation that circuit breaker disconnects, could indulge contact knife 21, increased the fail safe of using.

Claims

1. blocking mechanism disconnecting link, comprise and be fixed on the blade base (2) on the substrate (1) in the control cubicle, be arranged on the blade base (2) in the circuit and be hinged with contact knife (21), also be equipped with at least one alignment pin that can lock contact knife (21) (22) on this blade base (2), it is characterized in that; Described substrate (1) is provided with the latch fitting (3) that can limit alignment pin (22), be provided with compression spring (4) between latch fitting (3) and substrate (1) right side, this substrate (1) right side also be hinged with can roof pressure latch fitting (3) push pedal, hinged pull bar (6) is gone up in push pedal (5), and this pull bar (6) other end is hinged on the eccentric position of main shaft outrigger shaft (7) in the circuit breaker.

2. a kind of blocking mechanism disconnecting link according to claim 1 is characterized in that; Described blade base (2) comprises the ceramic wafer (11) that is arranged on the substrate (1), this ceramic wafer (11) is provided with contact knife seat (111) and following contact knife seat (112), described contact knife (21) is hinged on the contact knife seat (111), following contact knife seat (112) is provided with the cutter groove (211) that can match with contact knife (21), also is provided with the plug-in strip lid (23) that has through hole (231) and cooperate with blade base (2) on this blade base (2)

3. a kind of blocking mechanism disconnecting link according to claim 2 is characterized in that; Described alignment pin (22) is arranged in the plug-in strip lid (23).

4. a kind of blocking mechanism disconnecting link according to claim 1 is characterized in that; Described latch fitting (3) is the T type and by the insulating material manufacturing, this latch fitting (3) roof pressure is in alignment pin (22) end.

5. a kind of blocking mechanism disconnecting link according to claim 1 is characterized in that; Described push pedal (5) is fan-shaped, and this push pedal (5) is provided with several jointed shafts that also is fan-shaped array (51), and the scallop of push pedal (5) leans at latch fitting (3) end face.

6. a kind of according to claim 1 or 5 blocking mechanism disconnecting link is characterized in that; Described push pedal (5) is connected with pushing block (52) with the scallop that latch fitting (3) end face leans.