Contact finger assembly, conductive arm and horizontal in-line three-phase linkage isolation switch

Abstract

The invention discloses a contact finger assembly, a conductive arm and a horizontal direct insertion type three-phase linkage disconnecting switch, relates to the technical field of disconnecting switches, and aims to provide a three-phase linkage disconnecting switch which is flexible in arrangement form, high in rated current through-flow capacity, long in mechanical life and high in operation stability. The horizontal direct-insertion type three-phase linkage disconnecting switch comprises a bottom frame, a mounting assembly, three conductive assemblies, a shell, a driving assembly and a transmission assembly, the mounting assembly is fixed on the bottom frame, each conductive assembly comprises a static side conductive arm and a movable side conductive arm, and the transmission assembly comprises a main knife transmission shaft, an insulator connecting plate, a pull rod insulator and a transmission piece. Multi-point contact and close contact between the static side conductive arm and the moving contact are achieved through the double-contact-finger design and the double-path pressing mode, and the large through-flow area is achieved.

Description

Technical Field

[0001] This invention relates to the field of disconnector technology, specifically to a contact finger assembly, a conductive arm, and a horizontally inserted three-phase linkage disconnector. Background Technology

[0002] Currently, the technology for phase sequence switching disconnect switches in pumped storage power stations is mainly controlled by foreign countries. The starting disconnect switches used in conjunction with these switches suffer from the same problem, with China consistently relying on complete imports. This results in high procurement and maintenance costs and introduces instability into energy security. As the generator capacity used in pumped storage continues to increase and electricity demand rises, domestically operated starting disconnect switches can no longer meet the requirements for current carrying capacity and mechanical lifespan. Furthermore, currently used disconnect switches also suffer from inflexible layout, structural design conflicts with the compact space of the power plant, and complex transmission systems with low reliability.

[0003] Therefore, there is an urgent need for a disconnecting switch that is flexible in arrangement, has high rated current carrying capacity, long mechanical life, strong operational stability, and three-phase linkage, which is compatible with disconnecting switches for phase sequence switching. Summary of the Invention

[0004] The purpose of this invention is to provide a contact finger assembly, a conductive arm, and a horizontally inserted three-phase linkage disconnect switch, which provides a disconnect switch with flexible arrangement, high rated current carrying capacity, long mechanical life, strong operational stability, and three-phase linkage.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a contact finger assembly, including an outer spring sheet, an inner spring sheet, an outer contact finger, an inner contact finger, an insulating pad, a clamping rod, and a washer. A washer is provided between the first end of the outer spring sheet and the first end of the inner spring sheet, and the three are fixedly connected. The second end of the inner spring sheet contacts the outer contact finger. The first end of the insulating pad is fixedly connected to the inner contact finger. The middle part of the insulating pad passes through the outer contact finger. The first end of the clamping rod extends into the second end of the insulating pad. The second end of the outer spring sheet and the second end of the clamping rod are in contact.

[0006] Furthermore, both the outer and inner contact fingers are L-shaped structures.

[0007] The present invention also provides a conductive arm including a contact finger assembly, and further includes a conductive copper tube. The first end of the conductive copper tube is used for fixed connection with a post insulator. The outer wall of the second end of the conductive copper tube has two sets of grooves arranged back and forth along the axial direction of the conductive copper tube. The end of the second end of the conductive copper tube has a retaining ring with grooves evenly arranged circumferentially. The contact finger assembly consists of a plurality of components evenly arranged circumferentially along the conductive copper tube. The first ends of the outer spring plate and the inner spring plate are fixedly connected to the second end of the conductive copper tube. The middle portions of the outer contact finger and the inner contact finger extend into the grooves. The first end of the outer contact finger extends into the first set of grooves, and the first end of the inner contact finger extends into the second set of grooves. The second ends of the outer contact finger and the second ends of the inner contact finger are used for contact with a moving contact.

[0008] Furthermore, the groove is annular; or, each group of grooves consists of multiple grooves evenly arranged along the circumference of the conductive copper tube.

[0009] This invention also provides a horizontally inserted three-phase interlocking disconnect switch including conductive arms, comprising a base frame, a mounting assembly, conductive components, and a housing. The mounting assembly is fixed on the base frame. The conductive components have three sets, including stationary conductive arms and moving conductive arms. Both the stationary and moving conductive arms are fixed to the mounting assembly via post insulators. The housing covers the conductive components from above and to the sides. It also includes a drive assembly and transmission assemblies corresponding to the conductive components. The transmission assemblies include a main drive shaft, an insulator connecting plate, a pull rod insulator, and transmission components. The main drive shaft is rotatably mounted on the mounting assembly. The first end of the insulator connecting plate is connected to... The main drive shaft is fixedly connected, and the second end of the insulator connecting plate is fixedly connected to the first end of the pull rod insulator. The second end of the pull rod insulator is hinged to the first end of the moving contact through a transmission component. The second end of the moving contact extends into the contact finger assembly of the moving side conductive arm. The drive component is used to drive the synchronous rotation of the three main drive shafts. When the main drive shaft rotates, it drives the pull rod insulator to swing, which in turn pushes and pulls the moving contact to make linear motion through the transmission component. When the moving contact is inserted directly into the contact finger assembly on the stationary side conductive arm and contacts the contact finger assembly, the circuit is closed. When the moving contact is pulled out from the contact finger assembly on the stationary side conductive arm, the circuit is opened.

[0010] Furthermore, there are two post insulators between the stationary conductive arm and the mounting assembly, and between the moving conductive arm and the mounting assembly. A stationary support frame is fixed on the stationary conductive arm, and a moving support frame is fixed on the moving conductive arm. The stationary support frame is fixedly connected to the top of the corresponding two post insulators, and the moving support frame is fixedly connected to the top of the corresponding two post insulators. The stationary support frame, the moving support frame, and the post insulators work together to ensure that the stationary conductive arm and the moving conductive arm are collinear.

[0011] Furthermore, the transmission component includes a transmission fork and a transmission plate. The transmission fork is fixed to the second end of the pull rod insulator, the transmission fork is hinged to the first end of the transmission plate, and the second end of the transmission plate is hinged to the moving contact.

[0012] Furthermore, the three main drive shafts are arranged coaxially and are fixedly connected to each other by a drive rod.

[0013] Furthermore, the drive assembly includes an electric mechanism, a vertical linkage, a T-type converter, and a spindle. The electric mechanism and the T-type converter are both fixed on the base frame. The output shaft of the electric mechanism is fixedly connected to the input shaft of the T-type converter through the vertical linkage. The output end of the T-type converter is fixedly connected to the main drive shaft of one of the transmission components through the spindle.

[0014] Furthermore, it also includes a grounding switch, which comprises a grounding switch drive shaft, a swing arm, a switch arm connecting plate, a switch arm, and a stationary contact. The grounding switch drive shaft is rotatably connected to the mounting assembly. The first end of the swing arm is fixedly connected to the grounding switch drive shaft. The second end of the swing arm is hingedly connected to the first end of the switch arm connecting plate. The second end of the switch arm connecting plate is hingedly connected to the middle part of the switch arm. The first end of the switch arm is rotatably connected to the mounting assembly. The second end of the switch arm is fixedly connected to the stationary contact. The grounding switch drive shaft drives the switch arm to swing through the swing arm and the swing arm connecting plate, causing the stationary contact to contact or separate from the stationary conductive arm.

[0015] The beneficial effects of this invention are as follows: Both the stationary and moving conductive arms of this invention adopt a double-finger design, including an outer contact finger and an inner contact finger. A dual-path clamping force is formed by applying clamping force through the inner and outer spring plates. This dual-path clamping mechanism ensures that after the moving contact is inserted into the stationary conductive arm, stable and reliable multi-point contact can be formed between the moving contact and both the inner and outer contact fingers. This effectively increases the current-carrying area, reduces contact resistance and heat generation, thereby improving the rated current-carrying capacity and mechanical life, and ensuring safe operation under high-current starting conditions. Compared with the traditional vertical insertion and removal, the horizontal direct insertion method reduces the requirement for installation space clearance height, making it more suitable for compact layouts.

[0016] By using a single electric mechanism to drive the precise and synchronous opening and closing of the three-phase moving contacts and grounding switch, the problems of arc burns and current surges caused by asynchronous opening and closing are fundamentally eliminated, greatly improving the consistency and reliability of operation and simplifying the operating mechanism. Furthermore, the independent enclosure designed for each phase constitutes a crucial protection system, effectively isolating humid air and contaminants, preventing flashover accidents caused by condensation on the insulator surface, and ensuring the insulation reliability of the equipment under harsh operating conditions. Attached Figure Description

[0017] Figure 1This is a three-dimensional diagram of the present invention; Figure 2 This is one of the partial three-dimensional diagrams of the present invention; Figure 3 This is a second partial three-dimensional view of the present invention; Figure 4 This is a three-dimensional view of the stationary side conductive arm and the moving side conductive arm of the present invention; Figure 5 This is a three-dimensional view of the finger component of the present invention; Figure 6 This is a front view of the finger component of the present invention; Figure 7 This is a three-dimensional view of the insulator connecting plate of the present invention; Figure 8 This is a front view of the outer spring sheet of the present invention; Figure 9 This is a top view of the inner spring sheet of the present invention; Figure 10 This is a front view of the inner spring sheet of the present invention; Figure 11 This is a front view of the outer finger of the present invention; In the diagram: 1. Stationary conductive arm; 11. Stationary conductive arm square base; 12. Stationary conductive copper tube; 121. First set of grooves; 122. Second set of grooves; 13. Stationary contact finger assembly; 131. Outer spring plate; 132. Inner spring plate; 1321. Bending section; 1322. Notch; 133. Outer contact finger; 1331. Positioning end; 1332. Contact end; 134. Inner contact finger; 135. Snap ring; 1351. Snap groove; 136. Insulating pad; 137. Pressing rod; 138. Washer; 14. Stationary support frame; 2. Moving conductive arm; 21. Moving conductive arm square base; 22. Moving conductive copper tube; 23. Moving contact finger assembly; 24. Moving support frame; 25. Transmission component; 2 51 Drive fork, 252 Drive plate, 253 Hinge shaft, 26 Moving contact, 3 Post insulator, 4 Tie rod insulator, 5 Mounting assembly, 51 Body base, 52 Body mounting plate, 53 Insulator connecting plate, 54 Main blade drive shaft, 55 Bearing with seat, 6 Grounding knife, 61 Grounding knife drive shaft, 62 Swing arm, 63 Knife arm connecting plate, 64 Knife arm, 65 Stationary contact, 7 Housing, 71 Top cover, 72 Housing upper frame, 73 Housing lower frame, 74 Viewing glass window, 8 Base frame, 9 Drive assembly, 91 Main spindle, 92 Converter mounting plate, 93 T-type converter, 94 Vertical connecting rod, 95 Electric mechanism, 96 Motor mounting plate, 10 Drive rod. Detailed Implementation

[0018] like Figures 1 to 11 As shown, the present invention includes a stationary conductive arm 1, a moving conductive arm 2, a post insulator 3, a tie rod insulator 4, a mounting assembly 5, a grounding knife 6, a housing 7, a base frame 8, a drive assembly 9, and a transmission rod 10. The structure and working principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, a horizontally inserted three-phase interlocking disconnect switch including conductive arms includes a base frame 8, a mounting assembly 5, conductive components, and a housing 7. The base frame 8 is the basic component of this invention, used to install and support other structural components. The base frame 8 is formed by welding profiles and has three sets of legs, i.e., six legs. The mounting assembly 5 is fixed to the base frame 8 and includes a main body base 51 and a main body mounting plate 52, as shown. Figure 1 , Figure 2 As shown, the main body base 51 has a U-shaped structure and is fixedly connected to the base frame 8 by bolts. There are three mounting components 5, which are arranged sequentially from front to back, corresponding to the three phases of the disconnecting switch. Two main body mounting plates 52 are welded and fixed to the top of the main body base 51, and the main body base 51 between the two main body mounting plates 52 has a through hole.

[0020] The conductive assembly has three sets, corresponding to the three phases of the disconnecting switch, and each mounting assembly 5 is equipped with one set of conductive assemblies. The conductive assembly includes a stationary conductive arm 1 and a moving conductive arm 2, both of which are fixed to the mounting plate 52 of the mounting assembly 5 by post insulators 3.

[0021] The innovation of this invention is the structure of the finger assembly on the stationary conductive arm 1 and the moving conductive arm 2, namely the stationary finger assembly 13 on the stationary conductive arm 1 and the moving finger assembly 23 on the moving conductive arm 2. The stationary finger assembly 13 and the moving finger assembly 23 have the same structure. The stationary finger assembly 13 will be used as an example for the following description.

[0022] like Figure 5 , Figure 6 As shown, the stationary contact finger assembly 13 includes an outer spring plate 131, an inner spring plate 132, an outer contact finger 133, an inner contact finger 134, an insulating pad 136, a clamping rod 137, and a washer 138. The outer spring plate 131 and the inner spring plate 132 are made of stainless steel. Figure 8 As shown, the first end of the outer spring sheet 131 is straight, while the second end of the outer spring sheet 131 is bent, causing the second end of the outer spring sheet 131 to bend upwards. Figure 10 As shown, the first end of the inner spring sheet 132 is straight, and the second end of the inner spring sheet 132 is also bent to form a bent section 1321. Figure 9As shown, the second end of the inner spring plate 132 also has a notch 1322, which is provided to avoid the insulating pad 136 and the clamping rod 137. A washer 138 is provided between the first end of the outer spring plate 131 and the first end of the inner spring plate 132, and the three are fixedly connected, with the washer 138 separating the first ends of the outer spring plate 131 and the inner spring plate 132. The first ends of the outer spring plate 131 and the inner spring plate 132 are fixed to the conductive copper tube of the stationary side conductive arm 1, i.e., the stationary side conductive copper tube 12, by bolts. The bent section 1321 at the second end of the inner spring plate 132 extends away from the outer spring plate 131, and the second end of the outer spring plate 131 extends away from the inner spring plate 132. The second end of the inner spring plate 132 contacts the first end of the outer contact finger 133. The first end of the insulating pad 136 extends into a small hole on the inner contact finger 134, and the insulating pad 136 is fixedly connected to the inner contact finger 134. The middle part of the insulating pad 136 passes through the outer contact finger 133. The first end of the clamping rod 137 extends into the second end of the insulating pad 136. The second end of the outer spring plate 131 keeps in contact with the second end of the clamping rod 137, thereby pressing the first end of the clamping rod 137 into the second end of the insulating pad 136. Specifically, as shown... Figure 11 As shown, the outer contact finger 133 has an L-shaped structure, with its first end being the positioning end 1331 and its second end being the contact end 1332. The inner contact finger 134 also has an L-shaped structure, with its first end also being the positioning end 1331 and its second end being the contact end 1332. The horizontal portion of the inner contact finger 134 is fixedly connected to the first end of the insulating pad 136, and the middle portion of the insulating pad 136 passes through the horizontal portion of the outer contact finger 133, with the horizontal portion of the outer contact finger 133 contacting the second end of the inner spring plate 132. The vertical portions of the outer contact finger 133 and the inner contact finger 134 are used to contact the moving contact to achieve closing.

[0023] The moving-side contact assembly 23 also includes an outer spring plate 131, an inner spring plate 132, an outer contact finger 133, an inner contact finger 134, an insulating pad 136, a clamping rod 137, and a washer 138. Both the stationary-side contact assembly 13 and the moving-side contact assembly 23 have an outer contact finger 133 and an inner contact finger 134, i.e., they have dual contact fingers. Compared with the single contact finger structure, they have the advantages of multi-point contact and increased effective flow area. In addition, both the stationary-side contact assembly 13 and the moving-side contact assembly 23 have an outer spring plate 131 and an inner spring plate 132. Both the outer spring plate 131 and the inner spring plate 132 apply clamping force to the outer contact finger 133 and the inner contact finger 134, thereby forming a dual-path clamping mechanism. Through the dual-path clamping method, it can be ensured that both the outer contact finger 133 and the inner contact finger 134 maintain close contact with the moving contact. It can be seen that the stationary side contact finger assembly 13 and the moving side contact finger assembly 23 of the present invention achieve multi-point contact and close contact with the moving contact through the dual contact finger design and dual-path pressing method, and have a large flow area.

[0024] The second innovation of this invention is the structure of the stationary side conductive arm 1 and the moving side conductive arm 2. The structure of the stationary side conductive arm 1 and the moving side conductive arm 2 enables horizontal direct insertion for closing or opening the circuit. The structure of the stationary side conductive arm 1 is partially the same as that of the moving side conductive arm 2. The structure of the stationary side conductive arm 1 will be described first below.

[0025] like Figure 4 As shown, the stationary conductive arm 1 includes a stationary conductive arm base 11, a stationary conductive copper tube 12, a stationary contact finger assembly 13, and a stationary support frame 14. The first end of the stationary conductive copper tube 12 is fixedly connected to the stationary conductive arm base 11, and the stationary conductive arm base 11 is used to connect external leads. Figure 1 , Figure 2 As shown, the first end of the stationary conductive copper tube 12 is used for fixed connection with the post insulator 3. To ensure the horizontal placement of the stationary conductive copper tube 12, two post insulators 3 are provided between the stationary conductive arm 1 and the main mounting plate 52. A stationary support frame 14 is fixed to the first end of the stationary conductive copper tube 12. The stationary support frame 14 is fixedly connected to the top of the two post insulators 3. The stationary support frame 14 and the post insulators 3 work together to ensure the horizontal placement of the stationary conductive arm 1. The stationary contact finger assembly 13 is located at the second end of the stationary conductive copper tube 12. The specific assembly method is as follows: Figure 6 As shown, the outer wall of the second end of the stationary conductive copper tube 12 has two sets of grooves arranged back and forth along the axial direction of the stationary conductive copper tube 12, namely the first set of grooves 121 and the second set of grooves 122. Figure 5As shown, the second end of the stationary conductive copper tube 12 has a retaining ring 135. The retaining ring 135 is a circular ring structure, and has retaining grooves 1351 evenly arranged circumferentially. The function of the retaining ring 135 is to position the outer contact finger 133 and the inner contact finger 134, thereby achieving a circumferentially even distribution of the outer contact finger 133 and the inner contact finger 134. The second end of the stationary conductive copper tube 12 has a plurality of stationary contact finger assemblies 13 evenly arranged circumferentially. The first end of the outer spring plate 131 and the first end of the inner spring plate 132 are fixedly connected to the second end of the stationary conductive copper tube 12 by bolts. The middle part of the outer contact finger 133 and the middle part of the inner contact finger 134 extend into the slot 1351, thereby limiting the outer contact finger 133 and the inner contact finger 134 circumferentially along the stationary conductive copper tube 12, that is, making the circumferential position of the outer contact finger 133 and the inner contact finger 134 on the stationary conductive copper tube 12 remain unchanged. The first end of the outer contact finger 133, namely the positioning end 1331, extends into the first set of grooves 121. At this time, the first set of grooves 121 limits the first end of the outer contact finger 133 along the axial direction of the stationary conductive copper tube 12 and along the radial direction of the stationary conductive copper tube 12. That is, along the axial direction of the stationary conductive copper tube 12, the first end of the outer contact finger 133 is relatively stationary with respect to the stationary conductive copper tube 12; and along the radial direction of the stationary conductive copper tube 12, the first end of the outer contact finger 133 is relatively stationary with respect to the stationary conductive copper tube 12. The first end of the inner contact finger 134, i.e., the positioning end 1331, extends into the second set of grooves 122. At this time, the second set of grooves 122 limits the first end of the inner contact finger 134 along the axial direction and radial direction of the stationary conductive copper tube 12; that is, along the axial direction of the stationary conductive copper tube 12, the first end of the inner contact finger 134 is relatively stationary with respect to the stationary conductive copper tube 12; and along the radial direction inward of the stationary conductive copper tube 12, the first end of the inner contact finger 134 is relatively stationary with respect to the stationary conductive copper tube 12. The second ends of the outer contact finger 133 and the inner contact finger 134 are used to contact the moving contact 26. Under the synergistic action of the stationary conductive copper tube 12, both the outer spring plate 131 and the inner spring plate 132 exert a squeezing force on the outer contact finger 133 and the inner contact finger 134.

[0026] As explained above, the stationary side conductive arm base 11 of the stationary side conductive arm 1 is used to connect external leads, the stationary side conductive copper tube 12 of the stationary side conductive arm 1 is used to achieve conductivity, the stationary side contact finger assembly 13 of the stationary side conductive arm 1 is used to contact the moving contact 26 to achieve closing, and the stationary side support frame 14 of the stationary side conductive arm 1 is used to connect to the post insulator 3. The stationary side contact finger assembly 13 is arranged in a ring on the second end of the stationary side conductive copper tube 12, and the moving contact 26 extends into the circular space formed by the multiple stationary side contact finger assemblies 13 and contacts the outer contact finger 133 and the inner contact finger 134.

[0027] The moving-side conductive arm 2 and the stationary-side conductive arm 1 are arranged collinearly, such as... Figure 4As shown, the moving-side conductive arm 2 includes a moving-side conductive arm base 21, a moving-side conductive copper tube 22, a moving-side contact finger assembly 23, a moving-side support frame 24, and a moving contact 26. The first end of the moving-side conductive copper tube 22 is fixedly connected to the moving-side conductive arm base 21, and the moving-side conductive arm base 21 is used to connect external leads. Figure 1 , Figure 2 As shown, the first end of the moving-side conductive copper tube 22 is used for fixed connection with the post insulator 3. To ensure the horizontal placement of the moving-side conductive copper tube 22, there are two post insulators 3 between the moving-side conductive arm 2 and the main body mounting plate 52. The first end of the moving-side conductive copper tube 22 is fixed with a moving-side support frame 24, which is fixedly connected to the top of the two post insulators 3. The moving-side support frame 24 and the post insulators 3 work together to ensure the horizontal placement of the moving-side conductive arm 2. The moving-side contact finger assembly 23 is set at the second end of the moving-side conductive copper tube 22. Specifically, the outer wall of the second end of the moving-side conductive copper tube 22 has two sets of grooves arranged back and forth along the axial direction of the moving-side conductive copper tube 22, namely, the first set of grooves 121 and the second set of grooves 122. The first set of grooves 121 and the second set of grooves 122 can be annular, and the diameter of the circumference of the first set of grooves 121 is larger than the diameter of the circumference of the second set of grooves 122. Alternatively, the first set of grooves 121 and the second set of grooves 122 on the stationary conductive copper tube 12 are both multiple sets evenly arranged circumferentially, and the first set of grooves 121 and the second set of grooves 122 are located at different axial positions on the stationary conductive copper tube 12. The first set of grooves 121 and the second set of grooves 122 on the moving conductive copper tube 22 are both multiple sets evenly arranged circumferentially, and the first set of grooves 121 and the second set of grooves 122 are located at different axial positions on the moving conductive copper tube 22. The first set of grooves 121 has a limiting function for the outer contact finger 133, and the second set of grooves 122 has a limiting function for the inner contact finger 134.

[0028] The second end of the moving-side conductive copper tube 22 also has a retaining ring 135. The retaining ring 135 is a circular ring structure with retaining grooves 1351 evenly arranged circumferentially on it. The second end of the moving-side conductive copper tube 22 has a plurality of moving-side contact finger assemblies 23 evenly arranged circumferentially. The first end of the outer spring plate 131 and the first end of the inner spring plate 132 are fixedly connected to the second end of the moving-side conductive copper tube 22 by bolts. The middle part of the outer contact finger 133 and the middle part of the inner contact finger 134 extend into the retaining groove 1351. The first end of the outer contact finger 133 extends into the first set of grooves 121, and the first end of the inner contact finger 134 extends into the second set of grooves 122. The first end of the moving contact 26 passes through the moving side conductive arm seat 21, and the moving contact 26 is slidably connected to the moving side conductive arm seat 21. The sliding direction is the axial direction of the moving side conductive copper tube 22. The moving contact 26 also passes through the moving side conductive copper tube 22, and the moving contact 26 is in contact with the second end of the outer contact finger 133 and the second end of the inner contact finger 134 on the moving side conductive copper tube 22. Under the drive of external force, the moving contact 26 moves to the side where the stationary side conductive arm 1 is located, and when the moving contact 26 extends into the stationary side contact finger assembly 13 of the stationary side conductive arm 1, the stationary side conductive arm 1 and the moving side conductive arm 2 are connected and conduct electricity.

[0029] Because the disconnecting switch of this invention is installed in a compact, high-humidity enclosed space, the housing 7 is designed to prevent condensation and flashover due to contamination, thus protecting the conductive components. Figure 1 As shown, the outer casing 7 covers the conductive components from above and the sides. The outer casing 7 includes an upper cover 71, an upper frame 72, a lower frame 73, and a viewing window 74. The upper frame 72 and the lower frame 73 are vertically arranged and fixedly connected. The lower frame 73 is fixedly connected to the base frame 8, and the mounting assembly 5 is located inside the lower frame 73. The upper cover 71 is fixed to the top of the upper frame 72, thus closing the upper frame 72 from above. A viewing window 74 is provided on the side wall of the upper frame 72 to facilitate observation of the conductive components, post insulators 3, and other parts inside the outer casing 7.

[0030] The third innovation of this invention lies in the structure and arrangement of the transmission assembly. The transmission assembly converts rotational motion into linear movement of the moving contact 26, thereby driving the moving contact 26 to close in a horizontal, straight-insertion manner. To drive the movement of the moving contact 26, this invention includes a driving assembly 9 and a transmission assembly, such as... Figure 3 As shown, the transmission assembly includes a main blade drive shaft 54, an insulator connecting plate 53, a pull rod insulator 4, and a transmission component 25. The main blade drive shaft 54 ​​is rotatably mounted on the base 51 of the mounting assembly 5 via a bearing 55. The first end of the insulator connecting plate 53 is fixedly connected to the main blade drive shaft 54, and the second end of the insulator connecting plate 53 is fixedly connected to the first end of the pull rod insulator 4. The second end of the pull rod insulator 4 is hinged to the first end of the moving contact 26 via the transmission component 25. Figure 7As shown, the insulator connecting plate 53 includes two straight plates and a cylinder that fixes the two straight plates together. During installation, the cylinder is fitted onto the main drive shaft 54 ​​and secured with bolts. The two straight plates clamp the first end of the tie rod insulator 4 and are then fixedly connected with bolts. Specifically, as shown... Figure 4 As shown, the transmission component 25 includes a transmission fork 251 and a transmission plate 252. The transmission fork 251 has a U-shaped structure, and its middle part is fixed to the second end of the pull rod insulator 4 by bolts. The transmission plate 252 has two parts. The transmission fork 251 is hinged to the first end of the transmission plate 252, and the second end of the transmission plate 252 is hinged to the moving contact 26 through a hinge shaft 253. When the main drive shaft 54 ​​rotates, it drives the pull rod insulator 4 to swing through the insulator connecting plate 53. At this time, the transmission fork 251 swings synchronously with the pull rod insulator 4, and the transmission fork 251 pulls the transmission plate 252 to move, thereby pulling the moving contact 26 to move. The moving path of the moving contact 26 is a straight line, which is the line connecting the stationary side conductive arm 1 and the moving side conductive arm 2, thus realizing direct insertion opening and closing.

[0031] The fourth innovation of this invention is the arrangement of the transmission rod 10 and the drive assembly, which enables the synchronous operation of the three-phase conductive components. Specifically, the drive assembly is used to drive the synchronous rotation of the three main drive shafts 54, thereby causing the three-phase conductive components of the disconnecting switch to operate synchronously. Figure 1 As shown, the three main tool drive shafts 54 are arranged collinearly front to back and fixedly connected in pairs via drive rods 10. In this way, the three main tool drive shafts 54 are fixedly connected by two drive rods 10, achieving synchronous rotation of the three main tool drive shafts 54. Figure 1 , Figure 2 As shown, the drive assembly includes an electric mechanism 95, a vertical connecting rod 94, a T-type converter 93, and a main spindle 91. The electric mechanism 95 is fixed to the base frame 8 via a motor mounting plate 96, and the T-type converter 93 is fixed to the base frame 8 via a converter mounting plate 92. The output shaft of the motor mechanism 95 is fixedly connected to the input shaft of the T-type converter 93 via the vertical connecting rod 94, and the output end of the T-type converter 93 is fixedly connected to the main blade drive shaft 54 ​​of the foremost transmission assembly via the main spindle 91. When the motor mechanism 95 is working, it drives the T-type converter 93 through the vertical connecting rod 94. The T-type converter 93 has a bevel gear transmission mechanism inside, which converts the rotational motion in the horizontal plane into rotational motion in the vertical plane, thereby causing the main spindle 91 to rotate in the vertical plane, which in turn drives the synchronous rotation of the three main blade drive shafts 54.

[0032] To achieve grounding, the present invention also includes a grounding switch 6, such as... Figure 3As shown, the grounding switch 6 includes a grounding switch drive shaft 61, a swing arm 62, a switch arm connecting plate 63, a switch arm 64, and a stationary contact 65. The grounding switch drive shaft 61 is rotatably connected to the main body base 51 of the mounting assembly 5. The first end of the swing arm 62 is fixedly connected to the grounding switch drive shaft 61, and the second end of the swing arm 62 is hinged to the first end of the switch arm connecting plate 63. The second end of the switch arm connecting plate 63 is hinged to the middle of the switch arm 64. The first end of the switch arm 64 is rotatably connected to the main body base 51 of the mounting assembly 5, and the second end of the switch arm 64 is fixedly connected to the stationary contact 65. The grounding switch drive shaft 61 drives the switch arm 64 to swing through the swing arm 62 and the swing arm connecting plate 63, causing the stationary contact 65 to contact or separate from the stationary side conductive arm 1. Grounding is achieved when the stationary contact 65 contacts the stationary side conductive arm 1. There are three grounding blades 6, with one grounding blade 6 mounted on each main body base 51. The three grounding blades 6 operate synchronously, and their grounding blade drive shafts 61 are also fixedly connected by a drive rod 10. A drive assembly for rotating the grounding blade drive shafts 61 is also mounted on the base frame 8, and the structure of the drive assembly for rotating the grounding blade drive shafts 61 is exactly the same as the structure of the drive assembly for rotating the main blade drive shaft 54.

[0033] The working process of this invention is as follows: When the main switch is closed, the grounding switch 6 is in the open state. The electric mechanism 98 drives the T-type converter 93 through the vertical connecting rod 94, which in turn drives the main drive shaft 54 ​​through the main shaft 91. This drives the pull rod insulator 4 to rotate around the main drive shaft 54, thereby driving the moving contact 26 to move horizontally through the transmission component 25. The moving contact 26 is inserted into the stationary side contact finger assembly 13 of the stationary side conductive arm 1, realizing the closing of the main switch side. The opening process of the grounding switch 6 is similar. The electric mechanism 95 drives the T-type converter 93 through the vertical connecting rod 94, which in turn drives the grounding switch transmission shaft 61 through the main shaft 91. This pulls the swing arm 62 to move counterclockwise around the grounding switch transmission shaft 61, which in turn pulls the connecting plate 63 to make the blade arm 64 fall off the stationary contact 65. When the blade arm 64 moves to be parallel to the ground, the grounding switch 6 is in the open position. When the main switch is tripped, the grounding switch 6 is in the closed state. This working process is similar to that described above and will not be repeated here.

[0034] The stationary and moving conductive arms of this invention both employ a dual-finger design, comprising an outer contact finger and an inner contact finger. A clamping force is applied by the inner and outer spring plates to form a dual-path clamping mechanism. This dual-path clamping mechanism ensures that after the moving contact is inserted into the stationary conductive arm, stable and reliable multi-point contact is formed between the moving contact and both the inner and outer contact fingers. This effectively increases the current-carrying area, reduces contact resistance and heat generation, thereby improving the rated current-carrying capacity and mechanical life, and ensuring safe operation under high-current starting conditions. Compared to traditional vertical insertion and removal, the horizontal direct insertion operation reduces the required clearance height for installation space, making it more suitable for compact layouts. The precise synchronous opening and closing of the three-phase moving contacts and grounding switch driven by a single electric mechanism fundamentally eliminates the problems of arc burns and current surges caused by asynchronous opening and closing, greatly improving operational consistency and reliability, and simplifying the operating mechanism. In addition, the independent housing designed for each phase constitutes a critical protection system that effectively isolates humid air and dirt, prevents flashover accidents caused by condensation on the insulator surface, and ensures the insulation reliability of the equipment under harsh operating conditions.

Claims

1. A finger-touch component, characterized in that, It includes an outer spring sheet, an inner spring sheet, an outer contact finger, an inner contact finger, an insulating pad, and a clamping rod. A washer is provided between the first end of the outer spring sheet and the first end of the inner spring sheet, and the three are fixedly connected. The second end of the inner spring sheet contacts the outer contact finger. The first end of the insulating pad is fixedly connected to the inner contact finger. The outer contact finger passes through the middle of the insulating pad. The first end of the clamping rod extends into the second end of the insulating pad. The second end of the outer spring sheet and the second end of the clamping rod are in contact.

2. A finger-touch assembly according to claim 1, characterized in that, Both the outer and inner contact fingers have an L-shaped structure.

3. A conductive arm comprising a finger assembly according to any one of claims 1 to 2, characterized in that, It also includes a conductive copper tube, the first end of which is used for fixed connection with the post insulator. The outer wall of the second end of the conductive copper tube has two sets of grooves arranged back and forth along the axial direction of the conductive copper tube. The end of the second end of the conductive copper tube has a retaining ring with grooves evenly arranged circumferentially. The contact finger assembly consists of multiple components evenly arranged circumferentially along the conductive copper tube. The first ends of the outer spring plate and the inner spring plate are fixedly connected to the second end of the conductive copper tube. The middle parts of the outer contact finger and the inner contact finger extend into the grooves. The first end of the outer contact finger extends into the first set of grooves. The first end of the inner contact finger extends into the second set of grooves. The second ends of the outer contact finger and the inner contact finger are used to contact the moving contact.

4. The conductive arm according to claim 3, characterized in that, The groove is annular; or, each group of grooves consists of multiple grooves evenly arranged along the circumference of the conductive copper tube.

5. A horizontally inserted three-phase interlocking disconnect switch comprising the conductive arm of claim 3, comprising a base frame, a mounting assembly, a conductive assembly, and a housing, wherein the mounting assembly is fixed on the base frame, the conductive assembly has three sets including stationary conductive arms and moving conductive arms, both the stationary and moving conductive arms are fixed to the mounting assembly by post insulators, and the housing covers the conductive assembly from above and laterally, characterized in that... It also includes a drive assembly and a transmission assembly corresponding to each conductive assembly. The transmission assembly includes a main drive shaft, an insulator connecting plate, a pull rod insulator, and a transmission component. The main drive shaft is rotatably mounted on the mounting assembly. The first end of the insulator connecting plate is fixedly connected to the main drive shaft, and the second end of the insulator connecting plate is fixedly connected to the first end of the pull rod insulator. The second end of the pull rod insulator is hinged to the first end of the moving contact through the transmission component. The second end of the moving contact extends between the contact finger assemblies of the moving side conductive arm. The drive assembly is used to drive the synchronous rotation of the three main drive shafts. When the main drive shaft rotates, it drives the pull rod insulator to swing, which in turn pushes and pulls the moving contact to make linear motion through the transmission component. The first end of the moving contact is inserted directly into the contact finger assemblies on the stationary side conductive arm and contacts the contact finger assemblies to achieve closing. The moving contact is withdrawn from the contact finger assemblies on the stationary side conductive arm to achieve opening.

6. The horizontally inserted three-phase interlocking disconnector according to claim 5, characterized in that, Two post insulators are provided between the stationary conductive arm and the mounting assembly, and between the moving conductive arm and the mounting assembly. A stationary support frame is fixed on the stationary conductive arm, and a moving support frame is fixed on the moving conductive arm. The stationary support frame is fixedly connected to the top of the corresponding two post insulators, and the moving support frame is fixedly connected to the top of the corresponding two post insulators. The stationary support frame, the moving support frame, and the post insulators work together to ensure that the stationary conductive arm and the moving conductive arm are collinear.

7. The horizontally inserted three-phase interlocking disconnect switch according to claim 5, characterized in that, The transmission component includes a transmission fork and a transmission plate. The transmission fork is fixed to the second end of the pull rod insulator. The transmission fork is hinged to the first end of the transmission plate, and the second end of the transmission plate is hinged to the moving contact.

8. The horizontally inserted three-phase interlocking disconnect switch according to claim 5, characterized in that, The three main drive shafts are arranged coaxially and are fixedly connected to each other by a drive rod.

9. The horizontally inserted three-phase interlocking disconnect switch according to claim 8, characterized in that, The drive assembly includes an electric mechanism, a vertical linkage, a T-type converter, and a spindle. The electric mechanism and the T-type converter are both fixed on the base frame. The output shaft of the electric mechanism is fixedly connected to the input shaft of the T-type converter through the vertical linkage. The output end of the T-type converter is fixedly connected to the main drive shaft of one of the transmission components through the spindle.

10. The horizontally inserted three-phase interlocking disconnect switch according to claim 5, characterized in that, It also includes a grounding switch, which comprises a grounding switch drive shaft, a swing arm, a switch arm connecting plate, a switch arm, and a stationary contact. The grounding switch drive shaft is rotatably connected to the mounting assembly. The first end of the swing arm is fixedly connected to the grounding switch drive shaft. The second end of the swing arm is hinged to the first end of the switch arm connecting plate. The second end of the switch arm connecting plate is hinged to the middle of the switch arm. The first end of the switch arm is rotatably connected to the mounting assembly. The second end of the switch arm is fixedly connected to the stationary contact. The grounding switch drive shaft drives the switch arm to swing through the swing arm and the swing arm connecting plate, causing the stationary contact to contact or separate from the stationary conductive arm.

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