CN209804532U

CN209804532U - Load switch for looped network switchgear

Info

Publication number: CN209804532U
Application number: CN201920771009.0U
Authority: CN
Inventors: 冯立; 周兴明
Original assignee: WUXI KAILI ELECTRICAL APPLIANCE CO Ltd
Current assignee: WUXI KAILI ELECTRICAL APPLIANCE CO Ltd
Priority date: 2019-05-27
Filing date: 2019-05-27
Publication date: 2019-12-17
Anticipated expiration: 2029-05-27

Abstract

The utility model relates to an electric power system and equipment technical field just disclose a load switch for looped netowrk switchgear, including the cavity board, the downside of the inside of cavity board is rotated through first pivot and is connected with first contact, the downside inner wall of cavity board has seted up first recess with the position department of correspondence of first contact, be equipped with the ejector pad through moving mechanism in the first recess, the cavity has been seted up to the upside inner wall of cavity board, sliding connection has the slider in the cavity, first through-hole has been seted up to the downside of cavity, sliding connection has the movable rod in the first through-hole, the upper and lower both ends of movable rod all extend to the outside of first through-hole, the upper end of movable rod and the lower extreme fixed connection of slider, the lower extreme fixedly connected with movable block of movable rod. The utility model discloses, the electric arc that produces when not only can extinguish the separating brake fast, can prevent moreover that the instantaneous voltage of separating brake and closing brake is too big, has improved life.

Description

Load switch for looped network switchgear

Technical Field

The utility model relates to an electric power system and equipment technical field especially relate to a load switch for looped netowrk switchgear.

Background

The load switch is mainly used in the high-voltage ring main unit manufacturing industry, is widely used in a high-voltage power transmission and distribution network, can be applied for a long time at a voltage level of 10kV, and has stable performance. However, the performance (such as active load disconnection, transfer current disconnection, etc.) is greatly reduced at the voltage level of 24kV, and sometimes the loss of the function may be caused, so that the power supply quality is reduced, and the power supply accident is caused.

The existing load switch for the looped network switch equipment can generate electric arc when the load switch is switched off, high temperature generated by the electric arc has great damage to a movable contact of an isolation knife of the load switch, the movable contact of the isolation knife can be ablated, and the service life of the load switch is shortened, so that the load switch for the looped network switch equipment is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving among the prior art can produce electric arc when the separating brake, the high temperature that electric arc produced has great harm to load switch's isolation sword movable contact, can ablate and keep apart sword movable contact, has shortened load switch's life's problem, and the load switch for looped netowrk switchgear that proposes.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

A load switch for a looped network switchgear comprises a hollow plate, wherein a first contact is rotatably connected to the lower side of the inside of the hollow plate through a first rotating shaft, a first groove is formed in the position, corresponding to the position of the first contact, of the lower side inner wall of the hollow plate, a push block is arranged in the first groove through a moving mechanism, a cavity is formed in the upper side inner wall of the hollow plate, a sliding block is connected in the cavity in a sliding mode, a first through hole is formed in the lower side of the cavity, a movable rod is connected in the first through hole in a sliding mode, the upper end and the lower end of the movable rod both extend to the outside of the first through hole, the upper end of the movable rod is fixedly connected with the lower end of the sliding block, a movable block is fixedly connected to the lower end of the movable rod, a second groove is formed in the lower end of the movable block, a second contact is arranged in the second groove through a clamping mechanism, and, the front side wall of the movable block is fixedly connected with an arc extinguishing grid through bolts.

Preferably, the moving mechanism comprises a movable sleeve, a sliding rod and a connecting rod, the movable sleeve is located inside the first groove, the movable sleeve is connected with the groove wall of the first groove in a sliding mode, the sliding rod is located inside the movable sleeve, the rod wall of the sliding rod is connected with the inner cylinder wall of the movable sleeve in a sliding mode, the upper end of the sliding rod extends to the outside of the first groove and is connected with the lower end of the first contact in a rotating mode, a strip-shaped hole is formed in the groove bottom of the first groove, the connecting rod is located inside the strip-shaped hole, the rod wall of the connecting rod is connected with the hole wall of the strip-shaped hole in a sliding mode, the upper end and the lower end of the connecting rod both extend to the outside of the strip-shaped hole, the upper end of the connecting rod is fixedly connected with the outer wall of the lower.

preferably, the abutting mechanism comprises two springs and a limiting block, the peripheral side walls of the second contact are connected with the groove wall of the second groove in a sliding mode, the left side and the right side of the upper end of the second contact are fixedly connected with the springs, the upper end of each spring is fixedly connected with the groove bottom of the second groove, the limiting blocks are symmetrically and fixedly connected with the left side and the right side of the second contact, and the limiting grooves matched with the limiting blocks are formed in the groove walls of the left side and the right side of the second groove.

Preferably, elevating system includes the arc connecting rod of vertical setting, the right side wall of movable block and first contact all rotates through the upper and lower both ends of second pivot and arc connecting rod to be connected.

Preferably, the opening downside fixedly connected with fixed plate of well hollow plate, the second through-hole has been seted up to the upper end of fixed plate, sliding connection has ground contact in the second through-hole, the left side wall of fixed plate passes through bolt and ground contact fastening connection.

Preferably, the upper end of the first contact is arc-shaped, and the lower end of the second contact is provided with an arc-shaped groove matched with the upper end of the first contact.

preferably, the upper end of the ground contact is longitudinally and fixedly connected with two copper clamping pieces, and the side wall of one side of the copper clamping piece opposite to the side wall of the copper clamping piece is matched with the front side wall and the rear side wall of the first contact.

Preferably, the connecting rod and the push block are made of insulating materials.

Preferably, the arc-extinguishing grids are made of cold-rolled steel.

Compared with the prior art, the utility model provides a load switch for looped netowrk switchgear possesses following beneficial effect:

1. This load switch for looped netowrk switchgear, connecting rod through being equipped with, the ejector pad, the movable sleeve, slide bar and spring, promote the ejector pad, the ejector pad drives the movable sleeve and removes, the movable sleeve drives the slide bar and removes, the slide bar drives first contact and rotates around first pivot when the rebound, make first contact and second contact no longer contact, first contact is to the left-hand motion, drive arc connecting rod downstream, the arc connecting rod drives the movable block downstream again, and then be convenient for this switch separating brake and closing brake, two springs promote the second contact and support second contact and first contact 8 tightly, make first contact and second contact inseparabler, can prevent that the transient voltage when separating brake and closing brake is too big damages first contact and second contact, service life has been improved.

2. This load switch for looped netowrk switchgear, through the arc chute that is equipped with, when producing electric arc between first contact and the second contact, electric arc is drawn into the arc chute under the contractile force effect of magnetic force line, a plurality of short electric arcs are cut apart into to the arc chute that produces when separating brake, zero when alternating current crosses, all short electric arcs extinguish simultaneously, the electric arc that produces when can extinguish separating brake fast, prevent to cause the damage to the circuit, through the ground contact that is equipped with, ground contact is connected with ground, can in time insert ground with remaining electric quantity in the first contact after separating brake, through two copper clamping pieces that are equipped with, two copper clamping pieces multiplicable areas with first contact, make the effect of first contact ground connection better.

The part that does not relate to among the device all is the same with prior art or can adopt prior art to realize, the utility model discloses, the electric arc that produces when not only can extinguish the separating brake fast, can prevent moreover that the instantaneous voltage of separating brake and closing brake is too big, improved life.

Drawings

Fig. 1 is a schematic structural diagram of a load switch for a ring network switch device according to the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is an enlarged view of a portion B of FIG. 1;

fig. 4 is an enlarged view of a portion C of fig. 1.

In the figure: the device comprises a hollow plate 1, a movable block 2, a sliding block 3, a movable rod 4, an arc extinguishing grid 5, a copper clamping piece 6, a grounding contact 7, a first contact 8, an arc connecting rod 9, a second contact 10, a spring 11, a limiting block 12, a pushing block 13, a connecting rod 14, a movable sleeve 15, a sliding rod 16, a bolt 17 and a fixing plate 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-4, a load switch for a looped network switchgear, comprising a hollow plate 1, a first contact 8 is rotatably connected to the lower side of the inside of the hollow plate 1 through a first rotating shaft, a first groove is formed in the position corresponding to the position of the first contact 8 on the inner wall of the lower side of the hollow plate 1, a push block 13 is arranged in the first groove through a moving mechanism, the push block 13 is slidably connected to the bottom of the hollow plate 1, the moving mechanism comprises a movable sleeve 15, a slide rod 16 and a connecting rod 14, the movable sleeve 15 is located inside the first groove, the movable sleeve 15 is slidably connected to the groove wall of the first groove, the slide rod 16 is located inside the movable sleeve 15, the rod wall of the slide rod 16 is slidably connected to the inner cylinder wall of the movable sleeve 15, the upper end of the slide rod 16 extends to the outside of the first groove and is rotatably connected to the lower end of the first contact 8, a strip-shaped hole is formed in the groove bottom of the first groove, the rod wall of the connecting rod 14 is connected with the hole wall of the strip-shaped hole in a sliding manner, the upper end and the lower end of the connecting rod 14 both extend to the outside of the strip-shaped hole, the upper end of the connecting rod 14 is fixedly connected with the lower outer wall of the movable sleeve 15, the lower end of the connecting rod 14 is fixedly connected with the upper end of the push block 13, the connecting rod 14 and the push block 13 are both made of insulating materials, the insulating materials can prevent an operator from getting electric shock when in use and preventing casualties from being caused, a cavity is formed in the upper inner wall of the hollow plate 1, a sliding block 3 is connected in the cavity in a sliding manner, the sliding block 3 can prevent the movable rod 4 from being separated from the first through hole, the reliability of the device is improved, a first through hole is formed in the lower side of the cavity, a movable rod 4 is connected in the first through hole in a sliding manner, the upper end and the lower end of, the movable block 2 can support the abutting mechanism, the lower end of the movable block 2 is provided with a second groove, a second contact 10 is arranged in the second groove through the abutting mechanism, the upper end of the first contact 8 is arc-shaped, the lower end of the second contact 10 is provided with an arc-shaped groove matched with the upper end of the first contact 8, the arc-shaped upper end and the arc-shaped groove of the first contact 8 can greatly increase the contact area of the first contact 8 and the second contact 10, the first contact 8 and the second contact 10 can be prevented from being damaged by overlarge instantaneous voltage during opening and closing, the service life is prolonged, the abutting mechanism comprises two springs 11 and a limiting block 12, the peripheral side walls of the second contact 10 are in sliding connection with the groove walls of the second groove, the left side and the right side of the upper end of the second contact 10 are fixedly connected with the springs 11, the two springs 11 are always in a compression state, and the upper ends of the two springs 11 are fixedly connected with the groove bottom of the second groove, the left side and the right side of the second contact 10 are symmetrically and fixedly connected with limiting blocks 12, the left side and the right side of the second groove are both provided with limiting grooves matched with the limiting blocks 12, the right side walls of the movable block 2 and the first contact 8 are both provided with a lifting mechanism, the lifting mechanism comprises an arc-shaped connecting rod 9 which is vertically arranged, the right side walls of the movable block 2 and the first contact 8 are both rotatably connected with the upper end and the lower end of the arc-shaped connecting rod 9 through a second rotating shaft, the first contact 8 rotates leftwards to drive the arc-shaped connecting rod 9 to move downwards, the arc-shaped connecting rod 9 drives the movable block 2 to move downwards so that the whole abutting mechanism moves downwards, the first contact 8 and the second contact 10 are abutted conveniently, the front side wall of the movable block 2 is fixedly connected with an arc extinguishing grid 5 through bolts, when an electric arc is generated between the first contact 8 and the second contact 10, the electric arc is, the arc chute 5 can divide the electric arc generated during opening into a plurality of short electric arcs, when the alternating current passes through zero, all the short electric arcs are extinguished at the same time, the electric arc generated during opening can be extinguished quickly, the arc chute 5 is made of cold rolled steel, the arc extinguishing effect of the cold rolled steel is excellent, the lower side of the opening of the hollow plate 1 is fixedly connected with a fixing plate 18, the upper end of the fixing plate 18 is provided with a second through hole, a grounding contact 7 is connected in the second through hole in a sliding manner, the grounding contact 7 is connected with the ground, the residual electric quantity in the first contact 8 after opening can be accessed to the ground in time, the left side wall of the fixing plate 18 is fixedly connected with the grounding contact 7 through a bolt 17, the bolt 17 is in threaded connection with the fixing plate 18, the bolt 17 can be abutted against the left side wall of the grounding contact 7 after being screwed, the grounding contact 7 can be replaced conveniently, the upper end of the grounding contact 7 is fixedly connected with two copper clamping pieces 6 in, the two copper jaws 6 increase the contact area with the first contact 8, which may make the first contact 8 grounded more effectively.

In the utility model, when in use, the pushing block 13 is pushed, the pushing block 13 drives the movable sleeve 15 to move, the movable sleeve 15 drives the sliding rod 16 to move, the sliding rod 16 drives the first contact 8 to rotate around the first rotating shaft while moving upwards, so that the first contact 8 is not contacted with the second contact 10, and further the opening and closing of the arc are facilitated, the first contact 8 rotates leftwards to drive the arc connecting rod 9 to move downwards, the arc connecting rod 9 drives the movable block 2 to move downwards, the two springs 11 push the second contact 10 to tightly abut against the first contact 8 and the second contact 10, so that the first contact 8 is contacted with the second contact 10 more tightly, the first contact 8 and the second contact 10 can be prevented from being damaged by overlarge instantaneous voltage during the opening and closing, the service life is prolonged, when an electric arc is generated between the first contact 8 and the second contact 10, the electric arc is pulled into the arc extinguishing grid 5 under the contractile force action of magnetic lines, arc chute 5 can cut apart into a plurality of short electric arcs with the electric arc that produces during the separating brake, when alternating current zero crossing, all short electric arcs extinguish simultaneously, the electric arc that produces during the separating brake can extinguish fast, prevent to cause the damage to the circuit, ground contact 7 is connected with ground, can in time insert ground with remaining electric quantity in the first contact 8 after the separating brake, two copper clamping pieces 6 multiplicable area with first contact 8 contact, can make the effect of first contact 8 ground connection better, the arc upper end and the arc groove of first contact 8 can make the area of contact of first contact 8 and second contact 10 increase greatly, can prevent that the transient voltage when separating brake and closing is too big damages first contact 8 and second contact 10.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a load switch for looped netowrk switchgear, includes well hollow plate (1), its characterized in that, the downside of the inside of well hollow plate (1) rotates through first pivot to be connected with first contact (8), the downside inner wall of well hollow plate (1) has seted up first recess with the position department that corresponds of first contact (8), be equipped with ejector pad (13) through moving mechanism in the first recess, the upside inner wall of well hollow plate (1) has seted up the cavity, sliding connection has slider (3) in the cavity, the downside of cavity has seted up first through-hole, sliding connection has movable rod (4) in the first through-hole, the upper and lower both ends of movable rod (4) all extend to the outside of first through-hole, the upper end of movable rod (4) and the lower extreme fixed connection of slider (3), the lower extreme fixed connection of movable rod (4) has movable block (2), the lower extreme of movable block (2) has been seted up the second recess, be equipped with second contact (10) through supporting tight mechanism in the second recess, the right lateral wall of movable block (2) and first contact (8) is equipped with elevating system jointly, the preceding lateral wall of movable block (2) passes through bolt fixedly connected with arc chute (5).

2. the load switch for the looped network switchgear according to claim 1, wherein the moving mechanism comprises a movable sleeve (15), a sliding rod (16) and a connecting rod (14), the movable sleeve (15) is located inside the first groove, the movable sleeve (15) is slidably connected with the wall of the first groove, the sliding rod (16) is located inside the movable sleeve (15), the wall of the sliding rod (16) is slidably connected with the inner wall of the movable sleeve (15), the upper end of the sliding rod (16) extends to the outside of the first groove and is rotatably connected with the lower end of the first contact (8), a strip-shaped hole is formed at the bottom of the first groove, the connecting rod (14) is located inside the strip-shaped hole, the wall of the connecting rod (14) is slidably connected with the wall of the strip-shaped hole, and the upper end and the lower end of the connecting rod (14) both extend to the outside of the strip-shaped hole, the upper end of the connecting rod (14) is fixedly connected with the outer wall of the lower side of the movable sleeve (15), and the lower end of the connecting rod (14) is fixedly connected with the upper end of the push block (13).

3. The load switch of claim 1, wherein the abutting mechanism comprises two springs (11) and a limiting block (12), the peripheral side wall of the second contact (10) is slidably connected with the groove wall of the second groove, the springs (11) are fixedly connected to the left and right sides of the upper end of the second contact (10), the upper ends of the two springs (11) are fixedly connected with the bottom of the second groove, the limiting blocks (12) are symmetrically and fixedly connected to the left and right sides of the second contact (10), and the limiting grooves matched with the limiting blocks (12) are formed in the left and right side groove walls of the second groove.

4. The load switch for the looped network switchgear according to claim 1, wherein the lifting mechanism comprises an arc-shaped connecting rod (9) which is vertically arranged, and the right side wall of the movable block (2) and the right side wall of the first contact (8) are rotatably connected with the upper end and the lower end of the arc-shaped connecting rod (9) through a second rotating shaft.

5. The load switch for the looped network switchgear according to claim 1, wherein a fixing plate (18) is fixedly connected to a lower side of the opening of the hollow plate (1), a second through hole is formed in an upper end of the fixing plate (18), a ground contact (7) is slidably connected in the second through hole, and a left side wall of the fixing plate (18) is fixedly connected with the ground contact (7) through a bolt (17).

6. The load switch for the looped network switch equipment according to claim 1, wherein the upper end of the first contact (8) is arc-shaped, and the lower end of the second contact (10) is provided with an arc-shaped groove matched with the upper end of the first contact (8).

7. The load switch for the looped network switchgear according to claim 5, wherein the upper end of the grounding contact (7) is longitudinally and fixedly connected with two copper clamping pieces (6), and the side walls of the opposite sides of the two copper clamping pieces (6) are matched with the front and rear side walls of the first contact (8).

8. The load switch for the looped network switchgear according to claim 2, wherein the connecting rod (14) and the push block (13) are made of insulating material.

9. The load switch for the looped network switching device according to claim 1, wherein the arc extinguishing bars (5) are made of cold rolled steel.