CN205304073U - Nitrous switch cabinet of isolator and vacuum interrupter linkage - Google Patents

Abstract

The utility model relates to a nitrous switch cabinet of isolator and vacuum interrupter linkage belongs to electrical switchgear's technical field. The nitrous switch cabinet includes: operating mechanism component, by operating mechanism component driven three -phase isolation switch subassembly, with the three -phase be qualified for the next round of competitions cable junction three vacuum interrupter, be connected the linkage mechanism component of three -phase isolation switch subassembly and three vacuum interrupter switch, every looks isolating switch component and a vacuum interrupter install an insulating part the inside, three insulating part is installed at the cabinet internally through fixing at the internal installation roof beam of cabinet. The utility model discloses a with the linkage mechanism component of the coaxial motion of circuit breaker main shaft, break off earlier vacuum interrupter when closed isolating switch component reclosing vacuum interrupter and separating brake earlier when realize closing a floodgate and break off isolator again, isolator uses with vacuum interrupter's cooperation and has strengthened the arc extinguishing ability, has compensatied nitrogen gas and has compared not enough in the aspect of the insulating and arc extinguishing performance of SF6.

Description

Nitrogen gas switchgear with linkage between isolating switch and vacuum interrupter

technical field

The utility model relates to a nitrogen switch cabinet which is linked with an isolating switch and a vacuum interrupter, and belongs to the technical field of electric switch cabinets.

Background technique

Nitrogen gas cabinet is a kind of inflatable cabinet filled with lower pressure (0.1 ~ 0.5mpa) nitrogen in the shell. Since SF6 gas is defined as a restricted greenhouse gas, its consumption and emission should be controlled as much as possible in the high-voltage switch industry. So there is an urgent need for a non-SF6 gas inflatable cabinet. Nitrogen is purer than dry air, and nitrogen is green and environmentally friendly, but nitrogen does not have excellent arc extinguishing and insulating properties like SF6 gas, so a vacuum interrupter and isolating switch are installed in the nitrogen cabinet. There is an urgent need for a nitrogen switchgear with enhanced insulation and arc extinguishing performance.

Utility model content

The technical problem to be solved by the utility model is to aim at the deficiency of the above-mentioned background technology, and provide a nitrogen switchgear in which the isolating switch and the vacuum interrupter are linked. And the deficiencies in arc extinguishing performance, and solve the technical problem in the prior art that the insulation and arc extinguishing performance of nitrogen gas is not as good as that of SF6.

The utility model adopts the following technical solutions for solving the above-mentioned technical problems:

Nitrogen gas switchgear with disconnectors and vacuum interrupters linked, including: operating mechanism components, three-phase disconnector components driven by the operating mechanism components, three vacuum interrupters connected to three-phase outgoing cables, and three-phase disconnectors The assembly and the linkage mechanism assembly of the three vacuum interrupter switches, each phase isolation switch assembly and a vacuum interrupter are installed in an insulating piece, and the three insulating pieces are installed in the cabinet through the installation beam fixed in the cabinet;

During closing operation: the linkage mechanism component first drives the isolation switch component to close, and then drives the vacuum interrupter switch to rotate to close the vacuum interrupter.

When opening the gate: the linkage mechanism component first drives the switch of the vacuum interrupter to turn off the vacuum interrupter, and then drives the isolation switch component to open.

Further, in the nitrogen switch cabinet in which the isolating switch is linked with the vacuum interrupter, the linkage mechanism assembly includes: an isolating main shaft, a spline shaft, a clutch, a clutch sleeve, three insulating crank arms, a fork, two crank arms, a long link,

The isolation main shaft is mechanically connected with the operating mechanism components, the spline shaft is installed in the cabinet through the installation beam, the clutch and the clutch sleeve are connected side by side in the center of the isolation main shaft with a gap between them, and the three insulating crank arms are all connected On the isolation main shaft, the other ends of the three insulated crank arms are mechanically connected to the three-phase isolating switch assembly, the two crank arms are sleeved in the center of the spline shaft, one end of the fork is hinged to the clutch sleeve, and the other end of the fork is connected to the movable end of a crank arm Hinged, one end of the long connecting rod is hinged with the movable end of the other crank arm, and the other end of the long connecting rod is hinged with the movable end of the vacuum interrupter switch.

Still further, in the nitrogen switchgear in which the isolating switch is linked with the vacuum interrupter, the isolating switch assembly includes: isolating static contacts, isolating moving contacts, a protective cover set outside the contact area of the moving and static contacts, and balls,

The isolated moving contact includes: isolated moving contact push rod, isolated moving contact tube, isolated moving contact push rod, the isolated moving contact push rod is socketed outside the isolated moving contact push rod, and the isolated moving contact tube is socketed Outside the isolated moving contact push rod, the isolated moving contact push rod is fixedly connected with the insulating crank arm, there is a track for ball rolling between the isolated moving contact push rod and the isolated moving contact tube, and the inner wall of the isolated moving contact tube is fixed There is an isolation moving contact ring, and a built-in pressure spring is fixed between the isolation moving contact ring and the isolation moving contact push rod, and the isolation moving contact tube and the isolation moving contact push rod are linked through the built-in pressure spring.

Furthermore, in the nitrogen switchgear in which the isolating switch is linked with the vacuum interrupter, the isolating movable contact is a plum blossom contact.

As a further optimization scheme of the nitrogen switchgear in which the isolating switch is linked with the vacuum interrupter, the nitrogen switchgear also includes a three-phase grounding switch assembly, and each phase of the grounding switch assembly includes: a grounding knife socketed on the grounding spindle The component, the grounding copper bar and the grounding knife, the grounding knife assembly is connected to the grounding knife through the grounding copper bar.

The utility model adopts the above-mentioned technical scheme and has the following beneficial effects: a nitrogen switchgear in which the isolating switch is linked with the vacuum interrupter is provided, and the isolating switch assembly is closed first when the switch is closed through the linkage mechanism assembly coaxially moving with the main shaft of the circuit breaker Then close the vacuum interrupter and open the vacuum interrupter first and then disconnect the isolating switch. The combination of the isolating switch and the vacuum interrupter enhances the arc extinguishing ability and makes up for the insulation and arc extinguishing of nitrogen compared with SF6. Insufficient in performance; the moving contact of the isolating switch adopts the direct-acting plum blossom contact, which has good dynamic and thermal stability; the nitrogen switchgear involved in the utility model improves the reliability of the power supply system.

Description of drawings

Figure 1(a) and Figure 1(b) are the overall schematic diagram and front view of the nitrogen switchgear in the utility model respectively.

Figure 2(a) and Figure 2(b) are the side view and section view of the nitrogen switchgear, respectively.

Figure 3(a) and Figure 3(b) are the front view and side view of the nitrogen switchgear in the state that the disconnector and the vacuum interrupter are not closed, respectively.

Figure 4(a) and Figure 4(b) are the front view and side view of the nitrogen switchgear when the isolating switch is closed but the vacuum interrupter is not closed.

Figure 5(a) and Figure 5(b) are the front view and side view of the nitrogen switchgear in the closed state of the isolating switch and the vacuum interrupter, respectively.

Explanation of symbols in the figure: 1. Operating mechanism component, 2. Circuit breaker main shaft, 3. Moving fit, 4. Mounting beam, 5. Isolation main shaft, 6. Spline shaft, 7. Grounding main shaft, 8. Insulation tie rod, 9. Vacuum interrupter switch, 10, insulating arm, 11, clutch sleeve, 12, arm, 13, long connecting rod, 14, fork, 15, isolating static contact, 16, protective cover, 17, isolating moving contact Push rod, 18, isolation moving contact tube, 19, isolation moving contact push rod, 20, ball, 21, isolation static contact part, 22, clutch.

detailed description

The technical solution of the utility model will be described in detail below in conjunction with the accompanying drawings.

The technical solution of the utility model for solving key technical problems is a linkage device between an isolating switch and a vacuum interrupter. As shown in Figure 1(a), the nitrogen cabinet is composed of an operating mechanism component, a linkage mechanism component, three vacuum interrupters, and a three-phase isolating switch component. Each phase isolating switch component and a vacuum interrupter are installed in an insulating Inside the parts, three insulating parts are installed in the cabinet through the installation beam 4 fixed in the cabinet. The nitrogen switchgear also includes a three-phase grounding switch assembly, and each phase of the grounding switch assembly includes: a grounding knife assembly, a grounding copper bar and a grounding knife that are socketed on the grounding spindle, and the grounding knife assembly is connected to the grounding knife through the grounding copper bar .

As shown in Figure 1(b) and Figure 2(a), the linkage mechanism assembly includes: an isolated main shaft 5, a spline shaft 6, a clutch 22, a clutch sleeve 11, three insulating crank arms 10, a fork 14, two crank arms 12, long connecting rod 13. The isolation main shaft 5 is mechanically connected with the operating mechanism assembly 1, the spline shaft 6 is installed in the cabinet through the installation beam 4, the clutch 22 and the clutch sleeve 11 are connected side by side in the center of the isolation main shaft 5, and there is a gap between the two. Each insulating crank arm 10 is socketed on the isolation main shaft 5, and the other ends of the three insulating crank arms 10 are mechanically connected to the three-phase isolating switch assembly respectively. The two crank arms 12 are socketed in the center of the spline shaft 6. The cover 11 is hinged, the other end of the fork 14 is hinged with the movable end of a crank arm 12, one end of the long connecting rod 13 is hinged with the movable end of the other crank arm 12, and the other end of the long connecting rod 13 is connected with the activity of the vacuum interrupter switch 9. End hinged.

As shown in Figure 2(b), the isolating switch assembly includes: isolating static contacts 15, isolating static contact parts 21, isolating moving contacts, and a protective cover 16 set outside the contact area of the moving and static contacts. The isolated movable contact includes: isolated movable contact push rod 17, isolated movable contact tube 18, isolated movable contact push rod 19, the isolated movable contact push rod 19 is sleeved outside the isolated movable contact push rod 17, and the isolated movable contact The contact tube 18 is sleeved outside the isolated movable contact push rod 19, the isolated movable contact push rod 19 is fixedly connected with the insulating crank arm 10, and there is a supply ball between the isolated movable contact push rod 19 and the isolated movable contact tube 18. The rolling track of the isolated moving contact tube 18 is fixed with an isolated moving contact ring, and a built-in compression spring is fixed between the isolated moving contact ring and the isolated moving contact push rod 17, and the isolated moving contact tube 18 is connected with the isolated moving contact. The contact push rod 17 is linked by a built-in compression spring.

The operating mechanism assembly 1 controls the rotation of the main shaft 2 of the circuit breaker through the dynamic fit 3, the isolation main shaft 5 is connected to the operating mechanism assembly 1 and is controlled by the operating mechanism assembly 1, and the insulating arm connected to the isolation moving contact assembly controls the breaking of the isolation moving contact. open and close. The three-axis interlocking of the isolated main shaft 5, the spline shaft 6, and the ground main shaft 7, the isolated main shaft 5 realizes the linkage with the spline shaft 6 through the clutch 22, the clutch sleeve 11, the fork 14, the screw, the crank arm 12, the long connecting rod 13 in turn .

The nitrogen switchgear involved in the utility model is composed of a set of operating mechanism components, linkage mechanism components, three sets of vacuum interrupters and three sets of isolating switch components. During normal operation, the three sets of isolating switch components and the three sets of vacuum interrupters are fully disconnected to close the isolating switch, and the vacuum interrupter is disconnected to both of them are closed to realize the function of closing the isolating switch through the operating mechanism components. Fig. 3(a) and Fig. 3(b) are the front view and side view of the nitrogen switchgear in the state where the isolating switch and the vacuum interrupter are not closed.

The operating mechanism component 1 drives the isolation main shaft 5 to rotate, thereby driving the three insulating crank arms 10 and the clutch 22 sleeved on the isolation main shaft 5 to rotate. The head push rod 19 moves upward, and the action of the ball 20 drives the isolation movable contact tube 18 to move upward, and the built-in pressure spring further drives the isolation movable contact push rod 17 to move upward, and the three move upward together, at this time the clutch 22 Start to rotate the idling until the isolating movable contact push rod 17 collides with the isolating static contact 15, and the isolating movable contact push rod 17 stops moving, then the isolating switch is closed, and the clutch 22 idling is completed, as shown in Figure 4(a) , as shown in Figure 4(b). The isolation main shaft 5 continues to rotate, and the insulating arm 10 continues to drive the isolation movable contact push rod 19 to move upward. Due to the action of the ball 20, the isolation movable contact tube 18 also stops moving. At this time, the clutch 22 drives the clutch sleeve 11 to rotate, and the fork 14. The crank arm 12 drives the spline shaft 6 to rotate, and then drives the vacuum interrupter switch 9 to rotate through the long connecting rod 13 until it is connected to the insulating rod 8, and the vacuum interrupter is closed, as shown in Figure 5(a) and Figure 5( b) as shown. The process of realizing isolation presents three states in turn, the isolation switch and the vacuum interrupter are both disconnected, the isolation switch is closed and the vacuum interrupter is still open, and the isolation switch and the vacuum interrupter are closed.

To sum up, the utility model provides a nitrogen switchgear in which the isolating switch and the vacuum interrupter are linked. Through the linkage mechanism component that moves coaxially with the main shaft of the circuit breaker, the isolating switch component is closed first and then the vacuum arc extinguishing is closed when the switch is closed. Disconnect the vacuum interrupter first and then disconnect the isolating switch when switching off the chamber and the gate. The combination of the isolating switch and the vacuum interrupter enhances the arc extinguishing ability and makes up for the lack of nitrogen in terms of insulation and arc extinguishing performance compared to SF6; The moving contact of the isolating switch adopts the direct-acting plum blossom contact, which has good dynamic and thermal stability; the nitrogen switchgear involved in the utility model improves the reliability of the power supply system.

Claims (5)

1. the nitrogen switch cubicle that isolation switch links with vacuum interrupter, it is characterized in that, including: the link gear assembly of operating mechanism assembly, the three-phase isolation switch assembly of operating mechanism Component driver three vacuum interrupters being connected with three-phase outlet cable, connection three-phase isolation switch assembly and three vacuum interrupter switches, every isolated switch module and a vacuum interrupter are arranged on inside an insulating part, and three insulating parts are arranged in cabinet by the mounting rail being fixed in cabinet;

During closing operation: link gear assembly first drives switch component to close a floodgate and drives vacuum interrupter switch rotation Guan Bi vacuum interrupter again,

During sub-switching operation: link gear assembly first drives vacuum interrupter switch to rotate shutoff vacuum interrupter and drives switch component separating brake again.

2. the nitrogen switch cubicle that isolation switch links with vacuum interrupter according to claim 1, it is characterized in that, described link gear assembly includes: isolation main shaft (5), splined shaft (6), clutch (22), clutch cover (11), three insulation connecting lever (10), fork (14), two connecting levers (12), long connecting rods (13)

Isolation main shaft (5) is mechanically connected with operating mechanism assembly, splined shaft (6) is arranged in cabinet by mounting rail (4), clutch (22) and clutch cover (11) are socketed in isolation main shaft (5) central authorities side by side and leave therebetween one section of idle running, three insulation connecting lever (10) are all socketed in isolation main shaft (5), three insulation connecting lever (10) other end three-phase isolation switch assemblies respectively are mechanically connected, two connecting levers (12) are socketed in splined shaft (6) central authorities, fork (14) one end is hinged with clutch cover (11), the movable end of fork (14) other end and a connecting lever (12) is hinged, one end of long connecting rod (13) is hinged with the movable end of another connecting lever (12), long connecting rod (13) other end is hinged with the movable end of vacuum interrupter switch (9).

3. the nitrogen switch cubicle that isolation switch according to claim 1 or claim 2 links with vacuum interrupter; it is characterized in that; described switch component includes: isolates static contact (15), isolate moving contact, be enclosed within the protective cover (16) outside dynamic/static contact contact area, ball (20)

Isolation moving contact includes: isolation moving contact push rod (17), isolation moving contact pipe (18), isolation moving contact push rod (19), isolation moving contact push rod (19) is socketed in isolation moving contact push rod (17) outward, isolation moving contact pipe (18) is socketed in isolation moving contact push rod (19) outward, isolation moving contact push rod (19) is fixing with insulation connecting lever (10) to be connected, the track rolled for ball (20) is had between isolation moving contact push rod (19) and isolation moving contact pipe (18), isolation moving contact pipe (18) inwall is fixed with isolation moving contact ring, it is fixed with built-in stage clip between isolation moving contact ring and isolation moving contact push rod (17), isolation moving contact pipe (18) is linked by built-in stage clip with isolation moving contact push rod (17).

4. the nitrogen switch cubicle that isolation switch links with vacuum interrupter according to claim 3, it is characterised in that described isolation moving contact is Mume flower contact.

5. the nitrogen switch cubicle that isolation switch links with vacuum interrupter according to claim 1, it is characterized in that, described nitrogen switch cubicle also includes three-phase ground switch module, every phase ground connection switch module all includes: the earthing assembly being socketed on ground connection main shaft and grounding copper bar and earthing, and earthing assembly is connected with earthing by grounding copper bar.