Single-column vertical fracture double-arm folding type disconnecting switch applying comb-shaped contact finger structure
By adopting a two-step meshing method of comb-shaped finger structure and transmission structure in a single-column vertical fracture double-arm folding isolation switch, the silver-plated layer damage and virtual connection problems caused by point contact of traditional isolation switch are solved, and multiple implementations are achieved. Short-term contact improves flow margin and dynamic thermal stability, and extends the life of the silver-plated layer.
Patent Information
- Application Number
- CN202411513649.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-01-07
AI Technical Summary
The moving contact fingers of the traditional single-column vertical fracture double-arm folding isolating switch contact and engage with the static contact point, resulting in damage to the silver plated layer, increasing resistance and burn-out risks, and processing accuracy problems lead to frequent false connections.
The moving contact with a comb-shaped contact finger structure is adopted to achieve two-step meshing through the transmission structure. The comb-shaped contact finger of the moving contact deforms the static contact with the upper conductive tube itself to ensure that the total clamping force remains unchanged. Reduce the stress of the contact finger and the conductive tube and convert it into a multi-short-line contact method.
Improve the switching flow stability and dynamic thermal stability, reduce the risk of silver-plated layer failure and increased resistance, extend the operating life of the silver-plated layer with contact fingers, and solve the virtual connection caused by the complex processing of aluminum profile round tubes. question.
Smart Images
Figure CN119275034A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of disconnectors, in particular to a single-column vertical-break double-arm folding disconnector using a comb-shaped contact finger structure. Background Art
[0002] The isolating switch is an electrical device for switching on and off the circuit. The contact between the main conductor and the static contact of the isolating switch realizes the closing of the circuit, and the separation of the main conductor and the static contact of the isolating switch realizes the opening of the circuit. At present, the single-column vertical break double-arm folding isolating switches produced by domestic and foreign manufacturers rely on the deformation of the conductive tube itself to provide clamping force after the static contact and the moving contact finger are engaged, so that all the forces act on the engagement point, which is very likely to cause the silver plating layer at the engagement point of the contact finger to be damaged after multiple separations and closings, and the risk of increased resistance and even burning. At the same time, due to the processing accuracy, it is easy to cause the contact between the static contact and the moving contact finger to be point contact, rather than the ideal line contact. The point contact method will cause the switch's main electric thermal stability to be insufficient, and there is a risk of false connection; secondly, the processing process of aluminum profile round tubes is complicated, and it is easy to deform after bending, which exacerbates the risk of false connection. Summary of the invention
[0003] The object of the present invention is to provide a single-column vertical break double-arm folding isolating switch using a comb-shaped contact finger structure, which is used to solve the problem of point contact engagement between the moving contact finger and the static contact of the traditional isolating switch due to processing accuracy reasons, and the problem of silver plating layer damage, increased resistance and even burning due to concentrated clamping force at the engagement position of the moving contact finger.
[0004] The technical solution adopted by the present invention to solve its technical problems is: a single-column vertical break double-arm folding isolating switch using a comb-shaped contact finger structure, comprising a box, a first lower conductive tube, a second lower conductive tube, a first upper conductive tube, a second upper conductive tube, a moving contact and a transmission structure, wherein a first rotating shaft and a second rotating shaft arranged in parallel are rotatably installed in the box, the lower end of the first lower conductive tube is fixedly connected to the first rotating shaft, the lower end of the second lower conductive tube is fixedly connected to the second rotating shaft, the upper end of the first lower conductive tube is hingedly connected to the lower end of the first upper conductive tube, the upper end of the second lower conductive tube is hingedly connected to the lower end of the second upper conductive tube, and the first The middle part of the upper conductive tube is hingedly connected to the middle part of the second upper conductive tube, and the transmission structure is located in the box body to connect the first rotating shaft and the second rotating shaft together, and the synchronous and reverse rotation of the first rotating shaft and the second rotating shaft is realized through the transmission structure; the upper end of the first upper conductive tube and the upper end of the second upper conductive tube both have a moving contact, and the moving contact includes a main support member and a contact finger, the main support member is fixedly connected to the upper ends of the two upper conductive tubes, one end of the contact finger is fixedly connected to the main support member, and the middle part and the other end of the contact finger are in a comb tooth shape; when the switch is closed, the contact fingers of the two moving contacts cooperate to clamp the static contact, and the two upper conductive tubes themselves deform to clamp the static contact.
[0005] Furthermore, the moving contact also includes a secondary support member, the main support member and the secondary support member are respectively fixed on two opposite side surfaces of the upper conductive tube, and contact fingers are also fixed on the secondary support member.
[0006] Furthermore, each of the moving contacts comprises at least two contact fingers, and the main support member and the auxiliary support member each have at least one contact finger.
[0007] Furthermore, the moving contact also includes a fixing part and a spring steel sheet, the number of the fixing parts and the spring steel sheets is the same as the number of the contact fingers, and one contact finger corresponds to one fixing part and one spring steel sheet; one end of the spring steel sheet is fixedly connected to the corresponding main support member or the auxiliary support member, and the side surface of the fixing part has a groove, the fixing part is fixedly connected to the other end of the corresponding spring steel sheet, and the other end of the contact finger extends into the groove to maintain contact with the fixing part, and the fixing part is located between the corresponding spring steel sheet and the contact finger.
[0008] Furthermore, the main support member is an L-shaped structure, the long side of the main support member is fixedly connected to the upper conductive tube, and the contact finger is fixedly connected to the short side of the main support member.
[0009] Furthermore, the moving contact also includes an insulating plate, which is fixed on the long side of the main support member and the side wall of the upper conductive tube between the main support member and the secondary support member, and the insulating plate is used to clamp the static contact.
[0010] Furthermore, the vertical distance difference between the surface on the insulating plate used for clamping the static contact and the surface on the contact finger used for clamping the static contact is at least 2 mm.
[0011] Furthermore, the contact finger has strip-shaped notches arranged at equal intervals, and the width of each notch is equal.
[0012] Furthermore, the transmission structure includes an active crank arm, a first connecting rod and a second connecting rod, one end of the active crank arm is fixedly connected to the rotating insulator of the disconnector, the other end of the active crank arm is connected to the first rotating shaft through the first connecting rod, and the first rotating shaft is connected to the second rotating shaft through the second connecting rod; when the active crank arm rotates, the rotation of the first rotating shaft is driven by the first connecting rod, and the rotation of the first rotating shaft drives the rotation of the second rotating shaft through the second connecting rod.
[0013] The beneficial effects of the present invention are as follows: the meshing of the moving contact and the stationary contact of the present invention is a two-step action. While ensuring that the total value of the clamping force remains unchanged, the force on the contact finger and the upper conductive tube on the moving contact is reduced, thereby avoiding the virtual connection phenomenon caused by the damage of the silver-plated layer of the contact finger due to fatigue stress and the deformation of the upper conductive tube, and ensuring the stability of the switch current. The comb-tooth design of the contact finger makes the contact between the contact finger and the stationary contact become "multi-short line contact". In the multi-short line contact mode, the meshing line length of the contact finger and the stationary contact is increased, and each contact point exists independently, thereby improving the current margin and dynamic thermal stability of the disconnector. In addition, the multi-short line contact disperses the force on the contact finger when it is engaged, reducing the risk of damage to the silver-plated layer, increased resistance, and even burning, thereby increasing the operating life of the silver-plated layer of the contact finger. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 A three-dimensional diagram of the present invention; Figure 2 A top view of the present invention after the box cover of the box body is removed; Figure 3 A three-dimensional diagram of the disconnector closing state of the present invention; Figure 4 for Figure 3 A local enlarged view of point A in FIG. Figure 5 A front view of the main support member; Figure 6 It is a three-dimensional diagram of the moving contact; Figure 7 A three-dimensional diagram of the fixing; Figure 8 A three-dimensional assembly diagram of the first upper conductive tube and the moving contact; Fig. 9 It is a top view assembly drawing of the first upper conductive tube and the moving contact; Fig.10 It is a bottom view assembly drawing of the first upper conductive tube and the moving contact; In the figure: 1 box, 11 wiring board, 12 active crank arm, 13 first connecting rod, 14 driven crank arm, 15 first rotating shaft, 16 second connecting rod, 17 second rotating shaft, 2 first lower conductive tube, 2' second lower conductive tube, 3 first upper conductive tube, 3' second upper conductive tube, 4 pin, 5 main support member, 5' auxiliary support member, 6 contact finger, 61 notch, 7 fixing member, 71 groove, 72 through hole, 8 insulating plate, 9 spring steel sheet, 10 static contact. DETAILED DESCRIPTION
[0015] like Figures 1 to 10 As shown, the present invention comprises a box body 1, a transmission structure, a first lower conductive tube 2, a second lower conductive tube 2', a first upper conductive tube 3, a second upper conductive tube 3' and a moving contact. The structure and working principle of the present invention are described in detail below in conjunction with the accompanying drawings.
[0016] like Figure 1 , Figure 2 As shown, the box 1 is made of metal and is the basic component of the present invention. The bottom of the box 1 has a wiring board 11, and the wiring board 11 has mounting holes. The arrangement of the wiring board 11 facilitates the installation of the box 1 and the busbar. Figure 2 As shown, a first rotating shaft 15 and a second rotating shaft 17 are rotatably installed in the box body 1 in parallel, the lower end of the first lower conductive tube 2 is fixedly connected to the first rotating shaft 15, the lower end of the second lower conductive tube 2' is fixedly connected to the second rotating shaft 17, the upper end of the first lower conductive tube 2 is hingedly connected to the lower end of the first upper conductive tube 3, the upper end of the second lower conductive tube 2' is hingedly connected to the lower end of the second upper conductive tube 3', and the middle part of the first upper conductive tube 3 is hingedly connected to the middle part of the second upper conductive tube 3' through a pin 4. For ease of assembly, joints are welded at the lower ends of the first lower conductive tube 2 and the second lower conductive tube 2', the joint at the lower end of the first lower conductive tube 2 is fixedly connected to the end of the first rotating shaft 15 through bolts, and the joint at the lower end of the second lower conductive tube 2' is fixedly connected to the end of the second rotating shaft 17 through bolts.
[0017] like Figure 2 As shown, the transmission structure is located in the housing 1 to connect the first rotating shaft 15 and the second rotating shaft 17 together, and the transmission structure realizes the synchronous and reverse rotation of the first rotating shaft 15 and the second rotating shaft 17. Specifically, the transmission structure includes an active crank arm 12, a first connecting rod 13, a first driven crank arm 14 and a second connecting rod 16. One end of the active crank arm 12 is fixedly connected to the rotating insulator of the disconnector, and the other end of the active crank arm 12 is connected to the driven crank arm 14 through the first connecting rod 13. The driven crank arm 14 is fixedly connected to the first rotating shaft 15, and the first rotating shaft 15 is connected to the second rotating shaft 17 through the second connecting rod 16. When the active crank arm 12 rotates, the first rotating shaft 15 is driven to rotate through the first connecting rod 13, and the rotation of the first rotating shaft 17 drives the rotation of the second rotating shaft 17 through the second connecting rod 16. The other end of the active crank arm 12 is hinged to the first connecting rod 13, the first connecting rod 13 is hinged to the driven crank arm 14, and the second connecting rod 16 is hinged to the second rotating shaft 17, thereby realizing transmission from the active crank arm 12 to the first rotating shaft 15 and from the first rotating shaft 15 to the second rotating shaft 17. Under the action of the transmission structure, when the first rotating shaft 15 rotates clockwise, the second rotating shaft 17 rotates counterclockwise, and when the first rotating shaft 15 rotates counterclockwise, the second rotating shaft 17 rotates clockwise.
[0018] like Figure 1 As shown, the upper end of the first upper conductive tube 3 and the upper end of the second upper conductive tube 3' both have moving contacts, such as Figure 4 , Figure 6As shown, the moving contact includes a main support member 5 and a contact finger 6. The main support member 5 is fixedly connected to the upper ends of the two upper conductive tubes (the first upper conductive tube 3 and the second upper conductive tube 3'). One end of the contact finger 6 is a mounting end. The mounting end of the contact finger 6 is fixedly connected to the main support member 5. The middle part and the other end of the contact finger 6 are in a comb-tooth shape. The contact finger 6 has strip notches 61 arranged at equal intervals, and the width of each notch 61 is equal. The arrangement of the notches 61 makes the contact finger 6 in a comb-tooth shape. The notch 61 passes through the other end of the contact finger 6 and extends to the mounting end of the contact finger 6. When the switch is closed, the operating mechanism drives the first rotating shaft 15 and the second rotating shaft 17 to rotate in opposite directions through the transmission structure. At this time, the first lower conductive tube 2 and the second lower conductive tube 2' swing in the vertical plane, and the first lower conductive tube 2 swings clockwise, and the second lower conductive tube 2' swings counterclockwise. As shown Figure 3 As shown in FIG. 1 , the swing of the first lower conductive tube 2 and the second lower conductive tube 2' drives the swing of the first upper conductive tube 3 and the second upper conductive tube 3' connected thereto. At this time, the first upper conductive tube 3 and the second upper conductive tube 3' swing relative to each other while moving upward. As the switch is closed, Figure 4 As shown, the contact fingers 6 of the two moving contacts cooperate to clamp the static contact 10 to achieve flow. At the end of the closing, the two upper conductive tubes (the first upper conductive tube 3 and the second upper conductive tube 3') deform themselves to rigidly clamp the static contact 10 to ensure stable clamping. In this way, the purpose of flexible flow protection and rigid stability is achieved through the arrangement of the first upper conductive tube 3 and the second upper conductive tube 3', and the design of the moving contact including the comb-shaped structure contact fingers 6. The main support member 5 has at least one contact finger 6. In the embodiment of the present invention, two contact fingers 6 are arranged on the main support member 5. When the number of contact fingers 6 is multiple, the clamping force and contact length between the moving contact and the static contact 10 are increased in number. The main conductive structure of each phase of the disconnector includes six comb-shaped contact fingers 6, and the six contact fingers 6 are evenly divided into two groups and are installed on the two moving contacts, i.e., the sides of the two upper conductive tubes, in a structure symmetrical about the origin. During the closing process, the contact finger 6 provides a clamping force of about 360N to clamp the static contact 10, so that the contact finger 6 can be flexibly deformed to ensure the flow. Each conductive tube (the first lower conductive tube 2, the second lower conductive tube 2', the first upper conductive tube 3, and the second upper conductive tube 3') is a 90mm×50mm×5mm ribbed square tube. Compared with the traditional ribbed round tube aluminum profile conductive tube, the ribbed square tube has an increased flow area to meet the large current switch flow, and can solve the problem of virtual connection caused by deformation of the ribbed round tube aluminum profile and complex processing technology.
[0019] In order to improve the effect of the movable contact to ensure the flow of current with flexibility and to ensure stability with rigidity, the movable contact further includes a secondary support member 5'. The main support member 5 and the secondary support member 5' are respectively fixed on the two opposite sides of the upper conductive tube (the first upper conductive tube 3 and the second upper conductive tube 3'), and a contact finger 6 is also fixed on the secondary support member 5'. Specifically, as Figure 6As shown, on the first upper conductive tube 3, the main support 5 is fixed on the front side wall of the first upper conductive tube 3, and the secondary support 5' is fixed on the rear side wall of the first upper conductive tube 3, so that the first upper conductive tube 3 is located between the main support 5 and the secondary support 5'. In the same way, on the second upper conductive tube 3', the main support 5 is fixed on the rear side wall of the second upper conductive tube 3', and the secondary support 5' is fixed on the front side wall of the second upper conductive tube 3', so that the second upper conductive tube 3' is located between the main support 5 and the secondary support 5'. Of course, the main support 5 can also be fixed on the rear side wall of the first upper conductive tube 3 and the front side wall of the second upper conductive tube 3', and the secondary support 5' is fixed on the front side wall of the first upper conductive tube 3 and the rear side wall of the second upper conductive tube 3'. The secondary support 5' has a contact finger. The provision of the secondary support 5' increases the number of the moving contact fingers 6 and the spatial distribution range of the contact fingers 6, thereby increasing the clamping force and contact length between the moving contact and the stationary contact 10 from the angle of number and clamping position distribution. The upper conductive tube and the lower conductive tube are installed in a staggered manner, and the main support 5 and the secondary support 5' are connected to the upper conductive tubes (the first upper conductive tube 3 and the second upper conductive tube 3') by welding.
[0020] To ensure the elasticity of the contact finger 6, Figure 6 As shown, the moving contact further includes a fixing member 7 and a spring steel sheet 9, the number of the fixing members 7 and the spring steel sheet 9 is the same as the number of the contact fingers 6, and one contact finger 6 corresponds to one fixing member 7 and one spring steel sheet 9. Figure 8 , Fig.10 As shown, one end of the spring steel sheet 9 is fixedly connected to the corresponding main support member 5 or auxiliary support member 5', such as Figure 7 As shown, the side of the fixing member 7 has a groove 71, such as Figure 8As shown, the fixing member 7 is fixedly connected to the other end of the corresponding spring steel sheet 9, and the other end of the contact finger 6 extends into the groove 71 to maintain contact with the fixing member 7. In this way, the fixing member 7 is located between the corresponding spring steel sheet 9 and the contact finger 6. The fixing member 7 has two round holes 72, which are convenient for inserting bolts to achieve fixed connection between the fixing member 7 and the spring steel sheet 9. The setting of the fixing member 7 is used to maintain contact with the other end of the contact finger 6, thereby avoiding the distortion of the other end of the contact finger 6, which causes the notch 61 at the other end of the contact finger 6 to be non-coplanar, and provides a guarantee for the "multi-short line contact" mode between the comb-tooth contact finger 6 and the static contact 10. The other end of the contact finger 6 is in the shape of a comb, that is, it contains a plurality of strip structures, and each strip structure part can be used as an independent body to contact the static contact 10 without being affected by other strip structure parts on the contact finger 6. Compared with the traditional plate-shaped contact finger structure, the comb-shaped contact finger 6 is changed from a plate-shaped structure to a strip-shaped structure, so that the contact between the contact finger 6 and the static contact 10 changes from the traditional "single-line contact" to "multiple short-line contact", thereby avoiding the phenomenon of "point contact" between the contact finger 6 and the static contact 10 due to processing accuracy. The "multiple short-line contact" method increases the total contact length between the contact finger 6 and the static contact 10 by 67%, thereby improving the current margin and stability of the switch. When closing the switch, the first upper conductive tube 3 and the second upper conductive tube 3' drive the moving contact to squeeze the static contact 10, and transmit the force to the fixing part 7 through the spring steel sheet 9. In the process of squeezing the static contact 10, the contact finger 6 produces a deformation of 3mm due to contact deformation, thereby providing contact clamping force.
[0021] The fixing member 7 adopts a groove structure including a groove 71. The groove design can prevent the contact finger 6 from deforming due to processing technology or long-term force, resulting in the phenomenon that the strip notches of the contact finger 6 are not on the same horizontal plane, ensuring the reliable contact of the "multi-short line contact" of the contact finger 6. At the same time, the "multi-short line contact" makes the static contact 10 and the contact part of the contact finger 6 disperse the force when a large electric force is applied, balancing the current, thereby improving the dynamic thermal stability of the disconnector. The double-arm vertical disconnector with the comb-shaped contact finger 6 structure can improve the dynamic thermal stability test performance by at least 30%.
[0022] To facilitate assembly, Figure 5 As shown, the main support member 5 is an L-shaped structure, the long side of the main support member 5 is fixedly connected to the upper conductive tubes (the first upper conductive tube 3 and the second upper conductive tube 3 ′), and the contact finger 6 is fixedly connected to the short side of the main support member 5 .
[0023] To further ensure the clamping force, the moving contact also includes an insulating plate 8, such as Fig. 9As shown, the insulating plate 8 is fixed on the long side of the main support 5 and the side wall of the upper conductive tube (the first upper conductive tube 3 and the second upper conductive tube 3') between the main support 5 and the secondary support 5', and the insulating plate 8 is used to clamp the static contact 10. The vertical distance difference between the surface on the insulating plate for clamping the static contact and the surface on the contact finger for clamping the static contact is at least 2mm, and 3mm is taken in the embodiment of the present invention. When the present invention continues to close the switch, after the comb-shaped contact finger 6 is flexibly deformed by 3mm, it is restricted by the insulating plate 8 and no longer moves. At this time, the upper conductive tube (the first upper conductive tube 3 and the second upper conductive tube 3') drives the insulating plate 8 to continue to squeeze the static contact 10 through its own deformation. When the switch is closed, the upper conductive tube (the first upper conductive tube 3 and the second upper conductive tube 3') deforms itself to generate a clamping force of about 350N to clamp the static contact 10, so as to achieve rigid deformation of the upper conductive tube (the first upper conductive tube 3 and the second upper conductive tube 3') to ensure stability. The clamping force enables the insulating plate 8 to maintain reliable and rigid contact with the fixed contact 10, while the isolating switch still relies on the comb-tooth-shaped contact fingers 6 to achieve current flow.
[0024] Compared with the structure of the traditional isolating switch that only relies on the deformation of the conductive tube itself to provide the clamping force, the present invention adopts a two-step meshing method of "flexibility to ensure flow, rigidity to ensure stability", that is, the comb-tooth-shaped contact finger 6 first flexibly deforms to clamp the static contact 10, and then the two upper conductive tubes deform themselves to clamp the static contact 10. Under the condition of ensuring that the total value of the clamping force remains unchanged, the stress on the contact finger 6 is reduced by 48%. At the same time, the "multi-short line contact" also disperses the force on the comb-tooth-shaped contact finger 6 during meshing, thereby improving the operating life test capability of the silver-plated layer at the meshing point of the comb-tooth-shaped contact finger 6 by at least 100%. The two-step meshing method reduces the force generated by the rigid deformation of each conductive tube by 50%, avoids the phenomenon of virtual connection caused by plastic deformation of each conductive tube, and ensures the reliability of the operation of the isolating switch.
[0025] The meshing of the moving contact and the static contact of the present invention is a two-step action. Under the condition of ensuring that the total value of the clamping force remains unchanged, the force on the contact finger and the upper conductive tube on the moving contact is reduced, avoiding the virtual connection phenomenon caused by the damage of the silver-plated layer of the contact finger due to fatigue and the deformation of the upper conductive tube, and ensuring the stability of the switch current. The comb-tooth design of the contact finger makes the contact between the contact finger and the static contact become "multi-short line contact". Under the multi-short line contact mode, the meshing line length of the contact finger and the static contact is increased, and each contact point exists independently, thereby improving the current margin and dynamic thermal stability of the disconnector. In addition, the multi-short line contact disperses the force on the contact finger during meshing, reduces the risk of damage to the silver-plated layer, increased resistance, and even burning, thereby increasing the operating life of the silver-plated layer of the contact finger. The increased flow area of each conductive tube of the ribbed square tube structure of the present invention can meet the large current switch current, and each square conductive tube is easy to shape after bending, which solves the problem of the existing aluminum profile round tube being deformed due to bending, which aggravates the virtual connection, thereby ensuring the reliability of the switch closing.
Claims
1. A single-column vertical break double-arm folding disconnector using a comb-shaped contact finger structure, characterized in that: The invention comprises a box body, a first lower conductive tube, a second lower conductive tube, a first upper conductive tube, a second upper conductive tube, a moving contact and a transmission structure, wherein a first rotating shaft and a second rotating shaft arranged in parallel are rotatably installed in the box body, the lower end of the first lower conductive tube is fixedly connected to the first rotating shaft, the lower end of the second lower conductive tube is fixedly connected to the second rotating shaft, the upper end of the first lower conductive tube is hingedly connected to the lower end of the first upper conductive tube, the upper end of the second lower conductive tube is hingedly connected to the lower end of the second upper conductive tube, the middle part of the first upper conductive tube is hingedly connected to the middle part of the second upper conductive tube, and the The transmission structure is located in the box body and connects the first rotating shaft and the second rotating shaft together, and the synchronous and reverse rotation of the first rotating shaft and the second rotating shaft are realized through the transmission structure; the upper end of the first upper conductive tube and the upper end of the second upper conductive tube both have a moving contact, and the moving contact includes a main support and a contact finger, the main support is fixedly connected to the upper ends of the two upper conductive tubes, one end of the contact finger is fixedly connected to the main support, and the middle part and the other end of the contact finger are in a comb tooth shape; when the switch is closed, the contact fingers of the two moving contacts cooperate to clamp the static contact, and the two upper conductive tubes themselves deform to clamp the static contact.
2. A single-column vertical break double-arm folding isolating switch using a comb-shaped contact finger structure according to claim 1, characterized in that: The moving contact also includes a secondary support member. The main support member and the secondary support member are respectively fixed on two opposite side surfaces of the upper conductive tube. Contact fingers are also fixed on the secondary support member.
3. A single-column vertical break double-arm folding isolating switch using a comb-shaped contact finger structure according to claim 2, characterized in that: Each of the moving contacts comprises at least two contact fingers, and the main support member and the auxiliary support member each have at least one contact finger.
4. A single-column vertical break double-arm folding isolating switch using a comb-shaped contact finger structure according to claim 3, characterized in that: The moving contact also includes a fixing part and a spring steel sheet, the number of the fixing parts and the spring steel sheets is the same as the number of the contact fingers, and one contact finger corresponds to one fixing part and one spring steel sheet; one end of the spring steel sheet is fixedly connected to the corresponding main support member or the auxiliary support member, the side surface of the fixing part has a groove, the fixing part is fixedly connected to the other end of the corresponding spring steel sheet, and the other end of the contact finger extends into the groove to maintain contact with the fixing part, and the fixing part is located between the corresponding spring steel sheet and the contact finger.
5. The single-column vertical break double-arm folding isolating switch using a comb-shaped contact finger structure according to claim 1, characterized in that: The main support member is an L-shaped structure, the long side of the main support member is fixedly connected to the upper conductive tube, and the contact finger is fixedly connected to the short side of the main support member.
6. A single-column vertical break double-arm folding isolating switch using a comb-shaped contact finger structure according to claim 4, characterized in that: The moving contact also includes an insulating plate, which is fixed on the long side of the main support member and the side wall of the upper conductive tube between the main support member and the auxiliary support member, and is used to clamp the stationary contact.
7. A single-column vertical break double-arm folding isolating switch using a comb-shaped contact finger structure according to claim 6, characterized in that: The vertical distance difference between the surface on the insulating plate used for clamping the static contact and the surface on the contact finger used for clamping the static contact is at least 2 mm.
8. The single-column vertical break double-arm folding isolating switch using a comb-shaped contact finger structure according to claim 1, characterized in that: The contact fingers are provided with strip-shaped notches arranged at equal intervals, and the widths of the notches are equal.
9. The single-column vertical break double-arm folding isolating switch using a comb-shaped contact finger structure according to claim 1, characterized in that: The transmission structure includes an active crank arm, a first connecting rod and a second connecting rod. One end of the active crank arm is fixedly connected to the rotating insulator of the disconnector, and the other end of the active crank arm is connected to the first rotating shaft through the first connecting rod, and the first rotating shaft is connected to the second rotating shaft through the second connecting rod. When the active crank arm rotates, the first rotating shaft is driven to rotate through the first connecting rod, and the rotation of the first rotating shaft drives the rotation of the second rotating shaft through the second connecting rod.