High-reliability isolating switch contact system
By adopting the spring force distribution and guide slope design in the disconnector switch contact system, the problems of excessive closing force, poor heat dissipation, and easy jamming of the moving and stationary contacts in the existing technology are solved. The technical problems of the moving and stationary contacts are solved, and reliable contact between the moving and stationary contacts is achieved, thereby improving the closing reliability and service life of the disconnector switch.
Patent Information
- Application Number
- CN202422758988.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-12
AI Technical Summary
In the existing technology, the structural design of the contact system of the disconnecting switch in the existing isolation equipment is unreasonable. The technical problem of the stationary contact system of the moving contact and stationary contact is that the structural design of the stationary contact system of the existing disconnecting switch is unreasonable. This results in excessive closing force of the moving contact and stationary contact, poor heat dissipation of the moving contact and stationary contact, short service life, and easy jamming, which affects the reliability of closing.
A highly reliable disconnector contact system is adopted, including a stationary contact, a contact frame, and two moving contacts. The two moving contacts are pressed against the contact frame by springs. The elastic force of the springs is divided into two by the elastic contact arm to reduce the closing force. The design of the guide slope and slag groove ensures reliable contact between the moving and stationary contacts. The tight connection between the springs and the contact frame extends the service life.
It achieves reliable contact between the moving contact and the stationary contact, reduces slag jamming after arc erosion, improves heat dissipation and closing reliability, and extends service life.
Smart Images
Figure CN223612296U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to low voltage electrical apparatus technical field, more particularly to a high reliable isolator contact system. BACKGROUND
[0002] The isolator is a kind of equipment that isolates the power-off part from the live part, forms an obvious disconnecting point to isolate the fault equipment or carries out power-off maintenance. When electrical equipment is power-off maintenance, the equipment is isolated from power supply, and an obvious disconnecting point is formed to avoid safety accidents. The isolator is widely used in power distribution system and automation system of building, electric power, petroleum chemical industry and other industries.
[0003] The isolator includes base, cover, operating mechanism, contact holder, movable contact and static contact. The static contact of the existing isolator is fixed on the base, the contact holder is slidably arranged in the base, and the movable contact is arranged on the contact holder. The movable contact is separated from the static contact or closed by the sliding of the contact holder, to realize the connection or disconnection of the isolator. The structure design of the contact system of the existing isolator is unreasonable. When closing, the force of the static contact to open the movable contact is too large, which leads to the closing force of the movable contact and the static contact being too large. In the long-term use process, there is slag after arc ablation on the surface of the movable contact and the static contact, which leads to poor heat dissipation of the movable contact and the static contact, poor short-time withstand capability of the switch, and easy to cause the movable contact and the static contact to be stuck or dead during closing process, greatly affecting the closing reliability and service life of the contact system. SUMMARY
[0004] The utility model aims at overcoming the defects of prior art, and provides a high reliable isolator contact system with stable and reliable performance, good heat dissipation, reliable closing, long service life.
[0005] To achieve the above-mentioned purpose, the utility model adopts a high reliable isolator contact system, which comprises static contact, contact holder, two movable contacts, the two movable contacts are arranged in parallel in the two mounting holes of the contact holder and are pressed by two elastic sheets respectively, the two movable contacts form a contact space matched with the static contact between the two ends, the two elastic sheets have two elastic contact arms distributed symmetrically and extended outside the mounting hole at the two ends, the two ends of the movable contact are respectively provided with a positioning groove matched with the two elastic contact arms, and the tail of the two elastic contact arms has an arc contact part abutting in the positioning groove.
[0006] The beneficial effects of the above structure are that the elastic sheet is pressed on the moving contact through the two elastic contact arms, the elastic force of the elastic sheet is distributed on the two elastic contact arms, the force of the static contact to support the moving contact is reduced by half during the closing process, so that the static contact and the moving contact can be reliably and smoothly closed, and after the closing is completed, the elastic force of the two elastic contact arms is fully applied to the moving contact, so that the contact pressure of the moving contact and the static contact is guaranteed, and the contact of the moving contact and the static contact is more reliable. The two elastic contact arms are in contact with the positioning groove of the moving contact through the arc contact part, so that the elastic force of the elastic sheet can be stably and reliably applied to the moving contact. Therefore, the disconnecting switch contact system has the advantages of stable and reliable performance, good heat dissipation, reliable closing, long service life and high reliability.
[0007] In particular, the two moving contacts have moving contact parts extending outside the mounting hole, the moving contact parts of the two moving contacts are respectively provided with contact protrusions on the side facing the static contact, and the moving contact parts of the two moving contacts are respectively provided with slag grooves on the side corresponding to the contact protrusions. One end of the static contact has a static contact part matched with the contact protrusions of the two moving contacts, and two grooves are respectively arranged on the two sides of the static contact part corresponding to the slag grooves of the two moving contacts. The slag grooves are arranged on the moving contact, and the molten slag after arc ablation can directly fall into the slag grooves, so that the moving contact and the static contact are not likely to be stuck or dead during the closing process, and the contact of the moving contact and the static contact is more reliable. The slag grooves and the grooves are also conducive to heat dissipation of the moving contact and the static contact, thereby prolonging the service life of the contact system.
[0008] In particular, the moving contact parts of the two moving contacts are respectively provided with guide inclined surfaces matched with the static contact parts of the static contact on the two sides. The guide inclined surfaces can play a guiding role, which is conducive to reducing the closing force of the moving contact and the static contact, and can guarantee the contact of the moving contact and the static contact to be more reliable.
[0009] In particular, the static contact part of the static contact is respectively provided with two closing guide inclined surfaces on the side facing the two moving contacts. The closing guide inclined surfaces of the static contact can play a guiding role, which is conducive to reducing the closing force of the moving contact and the static contact, and can guarantee the contact of the moving contact and the static contact to be more reliable.
[0010] In particular, a positioning groove is arranged on the middle part of the elastic sheet, a positioning protrusion matched with the positioning groove is arranged in the mounting hole, the positioning protrusion is clamped in the positioning groove, and the clamping cooperation between the positioning protrusion and the elastic sheet is formed. The positioning groove of the spring is clamped on the positioning protrusion in the mounting hole, so that the assembly of the elastic sheet and the contact frame is facilitated, and the connection of the elastic sheet and the contact frame is more compact.
[0011] Particularly, the two moving contacts have a plurality of positioning blocks extending outside the contact holder, the mounting hole is provided with positioning steps matched with the plurality of positioning blocks, the plurality of positioning blocks abut on two ends of the positioning steps respectively, and the positioning blocks and the positioning steps form a limiting match. BRIEF DESCRIPTION OF DRAWINGS
[0012] Fig. 1 It is a perspective view of the embodiment of the utility model.
[0013] Fig. 2 It is a front view of the embodiment of the utility model.
[0014] Fig. 3 It is a sectional view of the embodiment of the utility model.
[0015] Fig. 4 It is a perspective view of the spring piece of the embodiment of the utility model.
[0016] Fig. 5 It is a perspective view of the moving contact of the embodiment of the utility model. DETAILED DESCRIPTION
[0017] As Figs. 1-5The utility model discloses an embodiment of the utility model is a kind of high-reliability disconnecting switch contact system, including static contact 10, contact frame 11, two moving contact 12, the two moving contact 12 parallelly arranged in the two mounting holes 111 of contact frame 11 and be pressed by two elastic sheets 13 respectively, the two moving contact 12 between two ends have the contact space 120 matched with static contact 10, two elastic sheets 13 two ends respectively have two elastic contact arms 131 of symmetrical distribution and extend in mounting hole 111 outside, the two ends of moving contact 12 are respectively provided with the positioning slot 121 matched with two elastic contact arms 131, the two elastic contact arms 131 tail portion has the arc contact portion 132 in the positioning slot 121. The two moving contact 12 have the dynamic contact portion 122 extended in mounting hole 111 outside, the dynamic contact portion 122 of the two moving contact 12 is respectively provided with contact protruding portion 123 on the side of static contact 10, the dynamic contact portion 122 of the two moving contact 12 is respectively provided with slag groove 124 on the side corresponding contact protruding portion 123, the static contact 10 one end has the static contact portion 101 matched with the contact protruding portion 123 of two moving contact 12, the static contact portion 101 two sides are respectively provided with two grooves 102 at the slag groove 124 of two moving contact 12. The slag groove is provided on moving contact, and the molten slag after electric arc ablation can directly fall into slag groove, during closing process, it is easy to cause that moving contact and static contact do not occur jam, jam, can guarantee that the contact of moving contact and static contact is more reliable, and slag groove, groove also benefit the heat dissipation of moving contact, static contact, to thereby benefit the service life of the contact system. The dynamic contact portion 122 of the two moving contact 12 two sides is respectively provided with the static contact portion 101 matched with the guide slope 125 of static contact 10. Guide slope can play the role of guiding, benefit to reduce the closing force of moving contact and static contact, can guarantee that the contact of moving contact and static contact is more reliable. The static contact portion 101 of static contact 10 is respectively provided with two closing guide slopes 103 on the side of two moving contact 12. The closing guide slope of static contact can play the role of guiding, benefit to reduce the closing force of moving contact and static contact, can guarantee that the contact of moving contact and static contact is more reliable.
[0018] As Figs. 1-3The middle part of the elastic sheet 13 is provided with a positioning groove 133, and the mounting hole 111 is provided with a positioning protrusion 112 matched with the positioning groove 133. The positioning protrusion 112 is clamped in the positioning groove 133, and the positioning protrusion 112 and the elastic sheet 13 are clamped and matched. The positioning groove of the spring is clamped on the positioning protrusion in the mounting hole, so that the assembly of the elastic sheet and the contact holder is facilitated, and the connection of the elastic sheet and the contact holder is more compact. The two movable contacts 12 have a plurality of positioning blocks 126 extending outside the contact holder 11, and the mounting hole 111 is provided with a positioning step 113 matched with the plurality of positioning blocks 126. The plurality of positioning blocks 126 abut on both ends of the positioning step 113, and the positioning block 126 and the positioning step 113 are limited and matched. The movable contact is clamped in the mounting hole of the contact holder through the plurality of positioning blocks, so that the assembly of the movable contact and the contact holder is facilitated, the assembly is more convenient, and the connection of the movable contact and the contact holder is more compact.
[0019] The elastic sheet is pressed on the movable contact through two elastic abutting arms, the elastic force of the elastic sheet is distributed on the two elastic abutting arms, the force of the static contact to support the movable contact is reduced by half during the closing process, so that the static contact and the movable contact can be reliably and smoothly closed, and after the closing is completed, the elastic force of the two elastic abutting arms acts on the movable contact, so that the contact pressure of the movable contact and the static contact is guaranteed, so that the contact of the movable contact and the static contact is more reliable. The two elastic abutting arms abut on the positioning groove of the movable contact through the arc abutting part, so that the elastic force of the elastic sheet can stably and reliably act on the movable contact. Therefore, the contact system of the disconnecting switch has the advantages of stable and reliable performance, good heat dissipation, reliable closing, long service life and high reliability.
Claims
1. A highly reliable disconnector contact system, comprising a stationary contact, a contact frame, and two moving contacts, wherein the two moving contacts are arranged parallel to each other in two mounting holes of the contact frame and are respectively pressed against by two spring pieces, and a contact space is formed between the two ends of the two moving contacts to cooperate with the stationary contact, characterized in that: Two elastic contact arms are symmetrically distributed at both ends of the elastic sheet and extend outside the mounting hole, the dynamic contact head is provided with a positioning groove at each end, and the tail of the elastic contact arm is provided with an arc contact part which is in contact with the positioning groove.
2. The high-reliability disconnector contact system of claim 1, wherein: The dynamic contact part of the dynamic contact head is provided with a contact protrusion part on the side facing the static contact head, and the dynamic contact part of the dynamic contact head is provided with a slag groove on the side corresponding to the contact protrusion part.
3. The high-reliability disconnector contact system of claim 2, wherein: The dynamic contact part of the dynamic contact head is provided with a static contact part of the static contact head on both sides.
4. The high reliable disconnector contact system according to claim 2 or 3, characterized in that: The static contact part of the static contact head is provided with two closing guide inclines on the side facing the dynamic contact head.
5. The high-reliability disconnector contact system of claim 1 or 2, characterized in that: The elastic sheet is provided with a positioning groove in the middle, the mounting hole is provided with a positioning protrusion which is matched with the positioning groove, the positioning protrusion is clamped in the positioning groove, and the positioning protrusion and the elastic sheet are clamped and matched.
6. The high-reliability disconnector contact system of claim 1 or 2, characterized in that: The dynamic contact head is provided with a plurality of positioning blocks which extend outside the contact frame, the mounting hole is provided with a positioning step which is matched with the plurality of positioning blocks, the plurality of positioning blocks are in contact with both ends of the positioning step, and the positioning blocks and the positioning step are limited and matched.