Isolating switch
By using limit blocks, lock bolts and modular grounding contact assembly in the isolating switch, the problems of complex structure and unreliable electrical performance of the existing isolating switch are solved, and more stable and reliable electrical contact and assembly are achieved. process.
Patent Information
- Application Number
- CN202323477745.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-19
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-19
AI Technical Summary
The structural design of the existing isolating switch is complex, and the fixation between the contact base and the mechanism frame is not compact, which leads to unreliable contacts between the moving contacts and the static contacts, uneven electric field, and unreliable electrical performance.
The design includes mechanism frame, isolation shaft, claw arm assembly, moving contact assembly, static contact, ground contact assembly, etc., ensures the moving contact and Reliable contacts of static contacts and convenient assembly through modular ground contact assembly.
It realizes an isolating switch with simple structure, stable and reliable performance, convenient assembly and reliable electrical performance, avoids the problems of contact inclination and uneven electric field, and improves the contact reliability and electrical performance between the dynamic contact and the static contact.
Smart Images
Figure CN222190561U_ABST
Abstract
Description
Technical Field
[0001] The utility model specifically relates to an isolating switch. Background Art
[0002] At present, many large-scale power consumption sites have been using ring network cabinets on a large scale; the ring network cabinet has a simple structure, safe and reliable operation, low maintenance frequency and low operating costs. Compared with traditional switch cabinets, the advantages are very prominent. In the technology of ring network cabinets, isolating switches are widely used. As a circuit switch in the ring network cabinet, the isolating switch not only plays the role of an ordinary switch, but also ensures the reliable grounding of the safety break and the lower end of the isolation, which absolutely guarantees the safety of circuit maintenance and repair personnel. It is one of the very important components in the ring network cabinet. The structural design of the existing isolating switch is relatively complex, the connection between the contact seat and the fixed frame of the mechanism frame is not compact, the contact seat and the static contact are prone to tilt, resulting in unreliable contact between the moving contact and the static contact, and the electric field between the three groups of moving contacts is uneven, the electrical performance is unreliable, and the isolating switch has the defect of unreliable performance. Summary of the invention
[0003] The purpose of the utility model is to overcome the defects of the prior art and provide an isolating switch with simple structure, stable and reliable performance, convenient assembly and reliable electrical performance.
[0004] To achieve the above-mentioned purpose, the utility model adopts an isolating switch, including a mechanism frame, an isolating shaft arranged on the mechanism frame, three groups of crank arm assemblies cooperating with the isolating shaft, three groups of moving contact assemblies cooperating with the three groups of crank arm assemblies, three static contacts arranged on a fixed plate of the mechanism frame, and a grounding contact assembly arranged on the mechanism frame, the crank arm assembly includes a driving arm cooperating with the isolating shaft, a cam member, and two transmission crank arms connected between the driving arm and the cam member, the moving contact assembly includes a contact seat arranged on a fixed frame of the mechanism frame, a moving contact rotatably arranged on the contact seat and cooperating with the cam member, the fixed frame is provided with two limit blocks abutting against two sides of the contact seat, and The two limit blocks and the contact seat are used for limiting cooperation, the moving contact includes two symmetrically arranged moving contact pieces, a locking bolt assembly arranged between the two moving contact pieces, the locking bolt assembly includes a first pair of locking bolts arranged on the two moving contact pieces, a second pair of locking bolts connected to the first pair of locking bolts, and a supporting sleeve arranged on the first pair of locking bolts between the two moving contact pieces, the first pair of locking bolts and the second pair of locking bolts are respectively provided with compression springs, the first pair of locking bolts and the second pair of locking bolts are respectively provided with shielding covers, the first pair of locking bolts and the second pair of locking bolts are respectively provided with washers that abut against the two moving contact pieces, and the two ends of the compression spring abut against the shielding cover and the washers respectively.
[0005] The beneficial effect of the above structure is that the limit block of the fixed frame limits the contact seat, which can prevent the contact seat from tilting, thereby ensuring that the moving contact assembly and the static contact can be in reliable contact. A locking bolt assembly is provided on the two moving contact pieces of the moving contact, and the compression spring of the locking bolt assembly can increase the contact pressure between the contact protrusions of the two moving contact pieces and the static contact, which can ensure that the contact between the moving contact piece and the static contact is more reliable. The two shielding covers of the locking bolt assembly are wrapped around the first pair of locking bolts and the second pair of locking bolts, and the tips of the first pair of locking bolts, the second pair of locking bolts, and the compression spring are contained in the shielding cover, so that the electric field is more uniform and the electrical performance is better. Therefore, the isolating switch has the advantages of simple structure, stable and reliable performance, convenient assembly, and reliable electrical performance.
[0006] In particular, contact convex points cooperating with the stationary contact are respectively arranged on one end of the two moving contact pieces corresponding to one side of the locking bolt assembly, and arc surfaces are respectively arranged at both ends of the two moving contact pieces. The compression spring of the locking bolt assembly can increase the contact pressure between the contact convex points of the two moving contact pieces and the stationary contact, and can ensure that the contact between the moving contact pieces and the stationary contact is more reliable. In addition, the two ends of the two moving contact pieces adopt an arc surface design, the moving contact pieces have no sharp points, the electric field is more uniform and ideal, and the electrical performance is more reliable.
[0007] In particular, one end of the stationary contact is provided with a screw connected to the fixing plate, and two limiting protrusions are provided on the fixing plate at both sides of the other end of the stationary contact, and the two limiting protrusions abut against the two sides of the stationary contact, and constitute a limiting match between the two limiting protrusions and the stationary contact. The two limiting protrusions on the fixing plate limit the stationary contact, which can prevent the stationary contact from tilting, and the connection between the stationary contact and the fixing plate is more firm, which can ensure that the contact between the stationary contact and the moving contact is more reliable.
[0008] In particular, a cushion block is arranged on the other end of the stationary contact, and a buffer pad matching with the moving contact is arranged between the cushion block and the stationary contact. The buffer pad has a buffering effect on the moving contact, thereby ensuring that the contact between the moving contact and the stationary contact is more reliable.
[0009] In particular, the grounding contact assembly includes a support frame arranged between two wall panels of the mechanism frame, a grounding conductive plate arranged on the support frame, and three grounding contacts respectively arranged on the grounding conductive plates. A clearance hole is arranged on the wall panel of the mechanism frame corresponding to the grounding conductive plate. One end of the grounding conductive plate has a rear-exit grounding overlap portion passing through the clearance hole, and the rear-exit grounding overlap portion is provided with an overlap hole exposed outside the mechanism frame. The grounding contact assembly adopts a modular structural design, which can realize the modular assembly of the grounding contact assembly and the mechanism frame. The grounding conductive plate is provided with an overlap hole, so as to facilitate the grounding overlap of multiple disconnectors and facilitate on-site construction.
[0010] In particular, the grounding contact is T-shaped, a buffer pad is provided on the support frame at a position corresponding to the grounding contact, a positioning groove is provided on the buffer pad, one side of the grounding contact is engaged in the positioning groove, and a clamping fit between the grounding contact and the buffer pad is formed. The grounding contact adopts a T-shaped structural design, thereby ensuring reliable contact between the grounding contact and the moving contact. The buffer pad can play a buffering role on the moving contact, thereby ensuring reliable contact between the moving contact and the grounding contact. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a stereoscopic diagram of an embodiment of the utility model from a first viewing angle.
[0012] Figure 2 This is a stereoscopic diagram from a second viewing angle of an embodiment of the utility model.
[0013] Figure 3 It is a three-dimensional diagram of a ground contact assembly according to an embodiment of the utility model. DETAILED DESCRIPTION
[0014] like Figures 1 to 3As shown, the embodiment of the utility model is a disconnector, comprising a mechanism frame 10, an isolation shaft 11 arranged on the mechanism frame 10, three groups of crank arm assemblies 20 linked with the isolation shaft 11, three groups of moving contact assemblies 30 linked with the three groups of crank arm assemblies 20, three static contacts 12 arranged on a fixed plate 101 of the mechanism frame 10, and a grounding contact assembly 40 arranged on the mechanism frame 10, the crank arm assembly 20 comprising a driving arm 21 linked with the isolation shaft 11, a cam member 22, and two transmission crank arms 23 connected between the driving arm 21 and the cam member 22, the moving contact assembly 30 comprising a contact seat 31 arranged on a fixed frame 102 of the mechanism frame 10, a moving contact 32 rotatably arranged on the contact seat 31 and linked with the cam member 22, the fixed frame 102 is provided with two limit blocks 1021 abutting against the two sides of the contact seat 32, and The two limit blocks 1021 constitute the limiting cooperation with the contact seat 32, the moving contact 32 includes two symmetrically arranged moving contact pieces 321, and a locking bolt assembly 50 arranged between the two moving contact pieces 321. The locking bolt assembly 50 includes a first pair of locking bolts 51 arranged on the two moving contact pieces 321, a second pair of locking bolts 52 connected to the first pair of locking bolts 51, and a supporting sleeve 53 arranged on the first pair of locking bolts 51 between the two moving contact pieces 321. The first pair of locking bolts 51 and the second pair of locking bolts 52 are respectively provided with compression springs 54, the first pair of locking bolts 51 and the second pair of locking bolts 53 are respectively provided with shielding covers 55, the first pair of locking bolts 51 and the second pair of locking bolts 52 are respectively provided with washers 56 that abut against the two moving contact pieces 321, and the two ends of the compression spring 54 abut against the shielding cover 55 and the washer 56 respectively. The two moving contact pieces 321 are provided with contact protrusions 3211 that match the static contact 12 at one end corresponding to the side of the locking bolt assembly 50, and arc surfaces 3212 are provided at both ends of the two moving contact pieces 3211. The compression spring of the locking bolt assembly can increase the contact pressure between the contact protrusions of the two moving contact pieces and the static contact, and can ensure that the contact between the moving contact piece and the static contact is more reliable. In addition, the two ends of the two moving contact pieces adopt an arc surface design, the moving contact piece has no tip, the electric field is more uniform and ideal, and the electrical performance is more reliable. The static contact 12 is provided with a screw 13 connected to the fixing plate 101 at one end, and two limiting protrusions 1011 are provided on the fixing plate 101 at both sides of the other end of the static contact 12. The two limiting protrusions 1011 abut on both sides of the static contact 12, and form a limiting match between the two limiting protrusions 1011 and the static contact 12. The two limiting protrusions on the fixed plate limit the static contact, which can prevent the static contact from tilting. The connection between the static contact and the fixed plate is more secure, which can ensure that the contact between the static contact and the moving contact is more reliable. A cushion block 14 is provided on the other end of the static contact 12, and a buffer pad 15 that cooperates with the moving contact 32 is provided between the cushion block 14 and the static contact 12.The buffer pad has a buffering effect on the moving contact, thereby ensuring that the contact between the moving contact and the stationary contact is more reliable.
[0015] like Figure 1 and 3 As shown, the grounding contact assembly 40 comprises a support frame 41 disposed between two wall panels 103 of the mechanism frame 10, a grounding conductive plate 42 disposed on the support frame 41, and three grounding contacts 43 disposed on the grounding conductive plates 42, respectively. A clearance hole 1031 is disposed on the wall panel 103 of the mechanism frame 10 corresponding to the grounding conductive plate 42, and one end of the grounding conductive plate 42 has a rear-exiting grounding overlap portion 421 passing through the clearance hole 1031, and the rear-exiting grounding overlap portion 421 is provided with an overlap hole 4211 exposed outside the mechanism frame 10. The grounding contact assembly adopts a modular structural design, which can realize the modular assembly of the grounding contact assembly and the mechanism frame, and the grounding conductive plate is provided with an overlap hole, so as to facilitate the grounding overlap of multiple disconnectors and facilitate on-site construction. The grounding contact 43 is in a T-shape, and a buffer block 44 is provided on the support frame 41 at a position corresponding to the grounding contact 43. A positioning groove 441 is provided on the buffer block 44. One side of the grounding contact 43 is engaged in the positioning groove 441, and the grounding contact 43 and the buffer block 44 are engaged with each other. The grounding contact adopts a T-shaped structure design, so that the grounding contact and the moving contact can be reliably contacted. The buffer block can play a buffering role on the moving contact, so that the moving contact and the grounding contact can be reliably contacted.
[0016] The limit block of the fixed frame limits the contact seat, which can prevent the contact seat from tilting, thereby ensuring that the moving contact assembly and the static contact can be in reliable contact. A locking bolt assembly is provided on the two moving contact pieces of the moving contact, and the compression spring of the locking bolt assembly can increase the contact pressure between the contact protrusions of the two moving contact pieces and the static contact, which can ensure that the contact between the moving contact piece and the static contact is more reliable. The two shielding covers of the locking bolt assembly are wrapped around the first pair of locking bolts and the second pair of locking bolts, and the tips of the first pair of locking bolts, the second pair of locking bolts, and the compression springs are contained in the shielding covers, so that the electric field is more uniform and the electrical performance is better. Therefore, the isolating switch has the advantages of simple structure, stable and reliable performance, convenient assembly, and reliable electrical performance.
Claims
1. An isolating switch, characterized in that: The invention comprises a mechanism frame, an isolating shaft arranged on the mechanism frame, three groups of crank arm assemblies cooperating with the isolating shaft, three groups of moving contact assemblies cooperating with the three groups of crank arm assemblies, three static contacts arranged on a fixed plate of the mechanism frame, and a grounding contact assembly arranged on the mechanism frame. The crank arm assembly comprises a driving arm cooperating with the isolating shaft, a cam member, and two transmission crank arms connected between the driving arm and the cam member. The moving contact assembly comprises a contact seat arranged on a fixed frame of the mechanism frame, a moving contact rotatably arranged on the contact seat and cooperating with the cam member. The fixed frame is provided with two limit blocks abutting on both sides of the contact seat, and the two limit blocks and the contact seat are formed. The movable contact comprises two symmetrically arranged movable contact pieces, a locking bolt assembly arranged between the two movable contact pieces, the locking bolt assembly comprises a first pair of locking bolts arranged on the two movable contact pieces, a second pair of locking bolts connected to the first pair of locking bolts, and a supporting sleeve arranged on the first pair of locking bolts at a position corresponding to the two movable contact pieces, the first pair of locking bolts and the second pair of locking bolts are respectively provided with compression springs, the first pair of locking bolts and the second pair of locking bolts are respectively provided with shielding covers, the first pair of locking bolts and the second pair of locking bolts are respectively provided with washers that abut against the two movable contact pieces, and the two ends of the compression spring abut against the shielding cover and the washers respectively.
2. The isolating switch according to claim 1, characterized in that: Contact convex points matching with the static contacts are respectively arranged on one end of the two moving contact pieces corresponding to one side of the locking bolt assembly, and arc surfaces are respectively arranged on both ends of the two moving contact pieces.
3. The isolating switch according to claim 1 or 2, characterized in that: One end of the stationary contact is provided with a screw connected to a fixing plate, and two limiting protrusions are provided on both sides of the fixing plate corresponding to the other end of the stationary contact. The two limiting protrusions abut against both sides of the stationary contact and constitute a limiting fit between the two limiting protrusions and the stationary contact.
4. The isolating switch according to claim 3, characterized in that A cushion block is arranged on the other end of the static contact, and a buffer pad matching with the moving contact is arranged between the cushion block and the static contact.
5. The isolating switch according to claim 1 or 2, characterized in that: The grounding contact assembly includes a support frame arranged between two wall panels of the mechanism frame, a grounding conductive plate arranged on the support frame, and three grounding contacts respectively arranged on the grounding conductive plates. A clearance hole is arranged on the wall panel of the mechanism frame corresponding to the grounding conductive plate. One end of the grounding conductive plate has a rear-exiting grounding overlap portion passing through the clearance hole, and the rear-exiting grounding overlap portion is provided with an overlap hole exposed outside the mechanism frame.
6. The isolating switch according to claim 5, characterized in that: The grounding contact is T-shaped, a buffer pad is arranged on the support frame at a position corresponding to the grounding contact, a positioning groove is arranged on the buffer pad, one side of the grounding contact is engaged in the positioning groove, and a snap-fitting fit between the grounding contact and the buffer pad is formed.