High-reliability isolating switch contact system
By using the shrapnel and arc-surface resistance design in the isolating switch contact system, the closing force is reduced and the heat dissipation is increased, and the problems of large closing force and poor heat dissipation of dynamic contacts and static contacts in the prior art are solved, thus achieving the problem of large closing force and poor heat dissipation of dynamic contacts and static contacts. High reliability and long life contact system.
Patent Information
- Application Number
- CN202411606732.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2024-12-27
AI Technical Summary
When the existing isolating switch contact system is closed, the force of the static contact to support the moving contact is too large, resulting in too large closing force between the static contact and the static contact, poor heat dissipation, and easy to cause arc ablation and stagnation. Impacts the reliability and service life of the closing.
Two moving contacts are arranged parallelly in the mounting hole of the contact frame. The elastic force is distributed on the two elastic resistance arms through the shrapnel to reduce the closing force, and the arc-surface resistance part and guide slope design are ensured. The elastic force is smooth, and the slag groove and groove are set so that the slag after arc ablation falls into it, reducing the risk of stagnation.
It realizes a reliable closing of static contacts and movable contacts, improves contact pressure and heat dissipation, extends service life, and ensures the stability and reliability of the isolation switch.
Smart Images
Figure CN119208062A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to a highly reliable isolating switch contact system. Background Art
[0002] Isolating switches are devices that isolate power-off parts from live parts and create an obvious disconnection point to isolate faulty equipment or perform power outage maintenance. When electrical equipment is shut down for maintenance, the equipment to be repaired is isolated from the power supply to form an obvious disconnection point to avoid safety accidents. Isolating switches are widely used in power distribution systems and automation systems in construction, electricity, petrochemicals and other industries.
[0003] The isolating switch includes a base, a cover, an operating mechanism, a contact frame, a moving contact, and a static contact. The static contact of the existing isolating switch is fixed on the base, the contact frame is slidably arranged in the base, and the moving contact is arranged on the contact frame. The moving contact and the static contact are separated and closed by sliding the contact frame to realize the connection or disconnection of the isolating switch. The structural design of the contact system of the existing isolating switch is unreasonable. When closing the switch, the force of the static contact to push the moving contact apart is too large, resulting in excessive closing force of the moving contact and the static contact. During long-term use, slag after arc erosion will exist on the surface of the moving contact and the static contact, resulting in poor heat dissipation of the moving contact and the static contact, poor short-term tolerance of the switch, and during the closing process, it is easy to cause the moving contact and the static contact to get stuck or stuck, which greatly affects the closing reliability and service life of the contact system. Summary of the invention
[0004] The object of the present invention is to overcome the defects of the prior art and provide a highly reliable isolating switch contact system with stable and reliable performance, good heat dissipation, reliable closing and long service life.
[0005] To achieve the above-mentioned purpose, the present invention adopts a highly reliable isolating switch contact system, including a static contact, a contact frame, and two moving contacts. The two moving contacts are arranged in parallel in two mounting holes of the contact frame and are respectively pressed by two spring sheets. A contact space matching with the static contact is formed between the two ends of the two moving contacts. The two ends of the two spring sheets respectively have two elastic resistance arms symmetrically distributed and extending outside the mounting holes. Positioning grooves matching with the two elastic resistance arms are respectively arranged on the two ends of the moving contact, and the tails of the two elastic resistance arms have arc resistance portions that resist in the positioning grooves.
[0006] The beneficial effects of the above structure are: the spring piece is pressed against the moving contact through two elastic contact arms, and the elastic force of the spring piece is divided into two and distributed on the two elastic contact arms. During the closing process, the force of the static contact to open the moving contact is reduced by half, thereby ensuring that the static contact and the moving contact can be closed reliably and smoothly, and after the closing is completed, the elastic force of the two elastic contact arms all acts on the moving contact, thereby ensuring the contact pressure between the moving contact and the static contact, so that the contact between the moving contact and the static contact is more reliable. And the two elastic contact arms are in contact with the positioning groove of the moving contact through the arc surface contact part, which can ensure that the elastic force of the spring piece can act on the moving contact stably and reliably. Therefore, the disconnector 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 holes, the moving contact parts of the two moving contacts are respectively provided with contact protrusions on the side facing the static contact, 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 matching with the contact protrusions of the two moving contacts, and two grooves are respectively provided on both sides of the static contact part corresponding to the slag grooves of the two moving contacts. The moving contact is provided with a slag groove, and the slag after arc ablation can directly fall into the slag groove. During the closing process, it is easy to cause the moving contact and the static contact not to be stuck or stuck, which can ensure that the contact between the moving contact and the static contact is more reliable, and the slag groove and the groove are also conducive to the heat dissipation of the moving contact and the static contact, thereby helping to extend the service life of the contact system.
[0008] In particular, the two sides of the moving contact parts of the two moving contacts are respectively provided with guiding inclined surfaces that match the static contact parts of the static contacts. The guiding 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 ensure that the contact between the moving contact and the static contact is more reliable.
[0009] In particular, two closing guide slopes are respectively arranged on the side of the static contact portion of the static contact facing the two moving contacts. The closing guide slopes 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 ensure that the contact between the moving contact and the static contact is more reliable.
[0010] In particular, a positioning groove is provided on the middle part of the spring sheet, a positioning protrusion matching the positioning groove is provided in the mounting hole, the positioning protrusion is engaged in the positioning groove, and a clamping fit between the positioning protrusion and the spring sheet is formed. The positioning groove of the spring is engaged with the positioning protrusion in the mounting hole, so as to facilitate the assembly of the spring sheet and the contact frame, and ensure that the connection between the spring sheet and the contact frame is more compact.
[0011] In particular, the two moving contacts are provided with a plurality of positioning blocks extending outside the contact frame, the mounting hole is provided with positioning steps matched with the plurality of positioning blocks, the plurality of positioning blocks are respectively abutted against the two ends of the positioning steps, and constitute the position-limiting cooperation between the positioning blocks and the positioning steps. The moving contact is engaged in the mounting hole of the contact frame through the plurality of positioning blocks, thereby facilitating the assembly of the moving contact and the contact frame, making the assembly more convenient, and ensuring a more compact connection between the moving contact and the contact frame. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a stereogram of an embodiment of the present invention.
[0013] Figure 2 It is a front view of an embodiment of the present invention.
[0014] Figure 3 It is a cross-sectional view of an embodiment of the present invention.
[0015] Figure 4 It is a three-dimensional diagram of a spring piece according to an embodiment of the present invention.
[0016] Figure 5 It is a three-dimensional diagram of a moving contact according to an embodiment of the present invention. DETAILED DESCRIPTION
[0017] like Figures 1 to 5As shown, an embodiment of the present invention is a highly reliable isolating switch contact system, comprising a static contact 10, a contact frame 11, and two moving contacts 12. The two moving contacts 12 are arranged in parallel in two mounting holes 111 of the contact frame 11 and are respectively pressed by two spring sheets 13. A contact space 120 matching the static contact 10 is formed between the two ends of the two moving contacts 12. The two ends of the two spring sheets 13 respectively have two elastic resistance arms 131 symmetrically distributed and extending outside the mounting holes 111. Positioning grooves 121 matching the two elastic resistance arms 131 are respectively arranged on the two ends of the moving contact 12. The tails of the two elastic resistance arms 131 have arc resistance portions 132 that resist in the positioning grooves 121. The two moving contacts 12 have a moving contact portion 122 extending outside the mounting hole 111, and the moving contact portions 122 of the two moving contacts 12 are respectively provided with contact protrusions 123 on the side facing the static contact 10, and slag grooves 124 are respectively provided on the moving contact portions 122 of the two moving contacts 12 corresponding to the side of the contact protrusions 123, and one end of the static contact 10 has a static contact portion 101 that matches the contact protrusions 123 of the two moving contacts 12, and two grooves 102 are respectively provided on both sides of the static contact portion 101 corresponding to the slag grooves 124 of the two moving contacts 12. A slag groove is provided on the moving contact, and the slag after arc ablation can directly fall into the slag groove. During the closing process, it is easy to cause the moving contact and the static contact to not get stuck or stuck, which can ensure that the contact between the moving contact and the static contact is more reliable, and the slag groove and the groove are also conducive to the heat dissipation of the moving contact and the static contact, thereby helping to extend the service life of the contact system. The two sides of the moving contact part 122 of the two moving contacts 12 are respectively provided with guide slopes 125 that match the static contact part 101 of the static contact 10. The guide slope can play a guiding role, which is conducive to reducing the closing force of the moving contact and the static contact, and can ensure that the contact between the moving contact and the static contact is more reliable. The static contact part 101 of the static contact 10 is respectively provided with two closing guide slopes 103 on one side facing the two moving contacts 12. The closing guide slope 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 ensure that the contact between the moving contact and the static contact is more reliable.
[0018] like Figures 1 to 3As shown, a positioning groove 133 is provided in the middle of the spring sheet 13, and a positioning protrusion 112 matching the positioning groove 133 is provided in the mounting hole 111. The positioning protrusion 112 is engaged in the positioning groove 133, and the positioning protrusion 112 and the spring sheet 13 are engaged. The positioning groove of the spring is engaged with the positioning protrusion in the mounting hole, so as to facilitate the assembly of the spring sheet and the contact frame, and ensure that the connection between the spring sheet and the contact frame is more compact. The two moving contacts 12 are provided with a plurality of positioning blocks 126 extending outside the contact frame 11, and a positioning step 113 matching the plurality of positioning blocks 126 is provided in the mounting hole 111. The plurality of positioning blocks 126 are respectively abutted against the two ends of the positioning step 113, and the positioning blocks 126 and the positioning step 113 are constrained. The moving contact is engaged in the mounting hole of the contact frame through a plurality of positioning blocks, thereby facilitating the assembly of the moving contact and the contact frame, making the assembly more convenient and ensuring a more compact connection between the moving contact and the contact frame.
[0019] The spring piece is pressed against the moving contact through two elastic contact arms, and the elastic force of the spring piece is divided into two and distributed on the two elastic contact arms. During the closing process, the force of the static contact to open the moving contact is reduced by half, thereby ensuring that the static contact and the moving contact can be closed reliably and smoothly, and after the closing is completed, the elastic force of the two elastic contact arms all acts on the moving contact, thereby ensuring the contact pressure between the moving contact and the static contact, so that the contact between the moving contact and the static contact is more reliable. In addition, the two elastic contact arms are in contact with the positioning groove of the moving contact through the arc surface contact part, which can ensure that the elastic force of the spring piece can act on the moving contact stably and reliably. Therefore, the disconnector contact system has the advantages of stable and reliable performance, good heat dissipation, reliable closing, long service life, and high reliability.
Claims
1. A highly reliable isolating switch contact system, comprising a stationary contact, a contact frame, and two moving contacts, wherein the two moving contacts are arranged in parallel in two mounting holes of the contact frame and are pressed by two springs respectively, and a contact space matching with the stationary contact is formed between the two ends of the two moving contacts, characterized in that: The two ends of the two spring sheets are respectively provided with two elastic resistance arms which are symmetrically distributed and extend outside the mounting hole. The two ends of the moving contact are respectively provided with positioning grooves which match the two elastic resistance arms. The tails of the two elastic resistance arms are provided with arc resistance parts which resist in the positioning grooves.
2. The high-reliability isolating switch contact system according to claim 1, characterized in that: The two moving contacts have moving contact portions extending outside the mounting holes, and the moving contact portions of the two moving contacts are respectively provided with contact protrusions on the side facing the static contact, and the moving contact portions of the two moving contacts are respectively provided with slag grooves on the side corresponding to the contact protrusions, and one end of the static contact has a static contact portion matching with the contact protrusions of the two moving contacts, and two grooves are respectively provided on both sides of the static contact portion at the slag grooves of the two moving contacts.
3. The high-reliability isolating switch contact system according to claim 2, characterized in that: Guide slopes matching with the static contact parts of the static contacts are respectively arranged on both sides of the dynamic contact parts of the two dynamic contacts.
4. The high-reliability isolating switch contact system according to claim 2 or 3, characterized in that: Two closing guide inclined surfaces are respectively arranged on one side of the static contact portion of the static contact facing the two moving contacts.
5. The high-reliability isolating switch contact system according to claim 1 or 2, characterized in that: A positioning groove is arranged on the middle part of the spring sheet, a positioning convex block matched with the positioning groove is arranged in the mounting hole, the positioning convex block is engaged in the positioning groove, and a snap fit between the positioning convex block and the spring sheet is formed.
6. The high-reliability isolating switch contact system according to claim 1 or 2, characterized in that: The two moving contacts are provided with a plurality of positioning blocks extending outside the contact frame, and the mounting hole is provided with positioning steps matching with the plurality of positioning blocks. The plurality of positioning blocks respectively abut against the two ends of the positioning steps, and constitute a limiting fit between the positioning blocks and the positioning steps.