550kV double-column horizontal rotation type disconnecting switch
By using rod-type self-forced contact fingers and mechanical interlocking components in the isolating switch, the problems of unreliability of conductive closing and locking system clamping under high voltage levels are solved, and the reliability of conductive closing and the stability of the locking system are realized, reducing the maintenance cost of equipment.
Patent Information
- Application Number
- CN202422363084.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The existing double-column horizontal rotary isolating switch has problems such as unreliable conduction closing and locking system stuck under high voltage levels, resulting in long maintenance cycles and high maintenance costs.
A 550kV double-column horizontal rotary isolating switch is designed, adopting a rod-type self-responsive contact finger structure and mechanical interlocking assembly. The conduction on the contact finger side and the conduction on the contact side achieve reliable contact through the rod-type self-responsive contact finger. The mechanical interlocking assembly reduces friction area through the linear contact between the roller and the locking disc.
It improves the reliability of conductive closing, reduces the risk of stuck locking in the locking system, and enhances the stability and maintenance efficiency of the equipment.
Smart Images
Figure CN223155897U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of disconnectors, in particular to a 550kV double-column horizontal rotary disconnector. Background Technique
[0002] At present, the voltage levels of double-column horizontal rotary single-break disconnectors at home and abroad are 363kV and below. There is a certain demand for double-column horizontal rotary single-break disconnectors with higher voltage levels in substations. For double-column horizontal rotary disconnectors with a voltage level of 363kV and below, there are problems such as unreliable conductive closing and jamming of the locking system, resulting in a long maintenance period and high maintenance costs. Therefore, there is an urgent need for a 550kV double-column horizontal rotary disconnector with reliable conductive closing and a stable mechanical locking structure. Content of the Utility Model
[0003] The purpose of the utility model is to provide a 550kV double-column horizontal rotary disconnector, which is used to solve the problems of unreliable conductive closing and jamming of the locking system existing in the existing double-column horizontal rotary disconnectors.
[0004] The technical solution adopted by the utility model to solve its technical problems is: a 550kV double-column horizontal rotary disconnector, including a base, an insulating component and a main conductor. There is a main knife electric mechanism on the base. The insulating component includes two post insulators. The lower ends of the post insulators are rotatably installed on the base through bearing seats. The main knife electric mechanism drives the rotation of the two post insulators through a main knife side transmission component. The main conductor includes a finger side conductor and a contact side conductor. One end of the finger side conductor and one end of the contact side conductor are fixed to the upper ends of the corresponding post insulators. The other end of the finger side conductor has a rod-type self-acting finger, and the other end of the contact side conductor has a contact. It also includes a mechanical interlock component. The mechanical interlock component includes a locking disc, a connecting rod and a locking joint. A locking disc is fixed to the lower end of each post insulator. There is a locking joint below each post insulator. There is a mounting bracket on the base. One end of the locking joint is hinged to the mounting bracket. The connecting rod is located between the other ends of the two locking joints, and the other ends of the locking joints are hinged to the corresponding ends of the connecting rod. There are rollers on the locking joints, and there are limit grooves on the edges of the locking discs. When the rollers on one side of the locking joints are located in the limit grooves of the corresponding locking discs, the rollers on the other side of the locking joints are in contact with the side walls of the corresponding locking discs except the limit grooves.
[0005] Further, both ends of the connecting rod are threadedly installed with connecting rod joints, and the connecting rod is hinged to the corresponding locking joints through the connecting rod joints.
[0006] Further, it further includes a latching component, the latching component includes a hook plate bracket and a conductive hook plate, the hook plate bracket is fixed at the other end of the finger-side conductor, the conductive hook plate is fixed at the other end of the contact-side conductor, and when the conductive hook plate hooks the hook plate bracket, the main conduction is latched.
[0007] Further, the main knife side transmission component includes an inter-pole connecting rod, one end of the inter-pole connecting rod is hinged to the lower end of one of the post insulators, the other end of the inter-pole connecting rod is hinged to the lower end of the other post insulator, and the synchronous and reverse rotation of the two post insulators is realized through the inter-pole connecting rod.
[0008] Further, one end of the inter-pole connecting rod has a bent joint, and the bent joint is hinged to the lower end of one of the post insulators.
[0009] Further, the other end of the inter-pole connecting rod has a U-bolt clamp, and the U-bolt clamp is fixedly connected to the other end of the inter-pole connecting rod and is hinged to the lower end of the other post insulator at the same time.
[0010] Further, the main knife side transmission component further includes a vertical connecting rod and a main knife crank arm, the lower end of the vertical connecting rod is fixedly connected to the output end of the main knife electric mechanism, and the upper end of the vertical connecting rod is connected to one of the post insulators through the main knife crank arm.
[0011] Further, it further includes a grounding switch, the grounding switch includes a left grounding knife, a right grounding knife, a grounding knife electric mechanism and a grounding knife transmission component, the grounding knife electric mechanism is fixed on the base, and the left grounding knife and the right grounding knife are driven to swing through the grounding knife transmission component.
[0012] The beneficial effects of the present utility model are as follows: The structure of the main conduction upper rod type self-acting finger of the present utility model has a large contact length with the contact, and its own deformation ensures the clamping force during contact, thereby ensuring the reliability of conductive closing and improving the debugging fault tolerance rate. Moreover, when the mechanical interlock component works, only the roller contacts the latching disc, effectively reducing the friction area, and can effectively reduce the jamming risk existing in the current 550KV disconnector latching. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a top view of the disconnector of the present utility model;
[0014] Figure 2 It is a front view of the disconnector of the present utility model;
[0015] Figure 3a It is a front view of the latching component;
[0016] Figure 3b It is a top view of the latching component;
[0017] Figure 4 Schematic diagram of the contact between the rod-type self-acting finger and the contact
[0018] Figure 5 is Figure 4 Partial enlarged view at position A in
[0019] Figure 6 Top view of the active side of the inter-pole connecting rod
[0020] Figure 7 Top view of the driven side of the inter-pole connecting rod
[0021] Figure 8 Top view of the mechanical interlock assembly
[0022] In the figure: 1 main knife crank arm, 2 inter-pole connecting rod, 3 left earthing knife crank arm, 4 left earthing knife, 5 right earthing knife, 6 right earthing knife crank arm, 7 finger side conduction, 71 hook plate bracket, 8 contact side conduction, 81 conduction hook plate, 9 upper side grading ring of the terminal block, 10 contact side grading ring, 11 finger side grading ring, 12 lower side grading ring of the terminal block, 13 earthing static contact, 14 post insulator, 15 base, 16 left earthing lock, 17 right earthing lock, 18 main knife electric mechanism, 19 earthing knife electric mechanism, 20 vertical connecting rod, 21 bent joint, 22 U-bolt clamp, 23 rod-type self-acting finger, 24 contact, 25 mounting bracket, 26 locking disc, 27 locking joint, 28 connecting rod, 29 roller, 30 connecting rod joint, 31 bearing block. Specific embodiments
[0023] As Figures 1 to 8 shown, the utility model includes a base 15, a main conduction, an insulation assembly, an earthing switch, a mechanical interlock assembly, a locking assembly and a grading ring assembly. The structure and working principle of the utility model will be described in detail below with reference to the accompanying drawings.
[0024] A 550 kV double-column horizontal rotary disconnector of the utility model is applicable to a 550 kV power supply line, and is used for switching on and off a high-voltage line under no-load conditions, and for electrically isolating a high-voltage busbar, a circuit breaker and other high-voltage electrical equipment to be overhauled from a live high-voltage line.
[0025] As Figures 1 to 8As shown in the figure, the utility model includes a base 15, a main conductive part, an insulating component, an earthing switch, a mechanical interlock component, a locking component and a grading ring component. The base 15 is the basic component of the utility model. Each phase of the disconnector has a base 15, which is assembled by hot-dip galvanized steel parts. A left earthing knife 4 and a right earthing knife 5 are installed on the base 15, and the left earthing knife 4 and the right earthing knife 5 are part of the earthing switch. The main knife electric mechanism 18 and the earthing knife electric mechanism 19 are indirectly fixed on the base 15. The output ends of the main knife electric mechanism 18 and the earthing knife electric mechanism 19 both have a vertical connecting rod 20. The upper end of the vertical connecting rod 20 at the output end of the main knife electric mechanism 18 is fixedly connected to one end of the main knife crank arm 1, and the upper end of the vertical connecting rod 20 at the output end of the earthing knife electric mechanism 19 is fixedly connected to the right earthing knife crank arm 6. In this way, when the main knife electric mechanism 18 drives the corresponding vertical connecting rod 20 to rotate, it can drive the rotation of the main knife crank arm 1; when the earthing knife electric mechanism 19 drives the corresponding vertical connecting rod 20 to rotate, it can drive the rotation of the right earthing knife crank arm 6. The right earthing knife crank arm 6 is connected to the right earthing knife 5, and when the right earthing knife crank arm 6 rotates, it drives the closing or opening of the right earthing knife 5. The right earthing knife crank arm 6 and the right earthing knife 5 are located on the right side of the base 15, and a left earthing knife crank arm 3 is provided on the left side of the base 15. The left earthing knife crank arm 3 is connected to the left earthing knife 4, and when the left earthing knife crank arm 3 rotates, it drives the closing or opening of the left earthing knife 4.
[0026] The left earthing lock 16 is installed between the left earthing knife crank arm 3 and the main knife crank arm 1, below the disconnector body, and adopts a swing arm type locking structure, which can realize the function that the earthing knife cannot be closed when the main knife is in the closed state, and the main knife cannot be closed when the earthing knife is in the closed state. The right earthing lock 17 is installed at the right earthing knife crank arm 6 and the main knife crank arm 1, in front of the disconnector body, and adopts a swing arm type locking structure. The function of the right earthing lock 17 is the same as that of the left earthing lock 16. The left earthing lock 16 and the right earthing lock 17 are prior arts.
[0027] The post insulator 14 is the insulation component of the present utility model. The post insulator 14 functions to establish the insulation of the conductive system from the ground and ensure the mechanical stability of the disconnector under static and dynamic loads. The insulating posts of the post insulator 14 are divided into pollution prevention grades III and IV, and are all composed of three sections of high-strength porcelain bottles. The upper end of the post insulator 14 has a grading ring 12 on the lower side of the terminal block. The grading ring 12 on the lower side of the terminal block has a grounding static contact 13, and the grading ring 12 on the lower side of the terminal block is located below the main conductor. Above the main conductor, there is a grading ring 9 on the upper side of the terminal block. The grading ring 12 on the lower side of the terminal block and the grading ring 9 on the upper side of the terminal block are both prior arts and will not be elaborated. The lower end of the post insulator 14 is rotatably installed on the base 15 through a bearing block 31. There are two bearing blocks 31 arranged left and right on the base 15. The left post insulator 14 is connected to the other end of the main knife crank arm 1. In this way, when the main knife crank arm 1 rotates, it drives the rotation of the left post insulator 14. The left post insulator 14 and the right post insulator 14 are connected by an inter-pole link 2. As Figure 6 shown, the active side of the inter-pole link 2 is a bent joint 21. As Figure 1 shown, the bent joint 21 is hinged to the left bearing block 31; as Figure 7 shown, the driven side of the inter-pole link 2 is a U-bolt clamp 22 structure. As Figure 1 shown, the U-bolt clamp 22 is fixedly connected to the inter-pole link 2 on the one hand and hinged to the right bearing block 31 on the other hand. The structural design of the inter-pole link 2 facilitates on-site debugging. The vertical link 20, the active crank arm 1 and the inter-pole link 2 at the output end of the main knife electric mechanism 18 constitute the main knife side transmission assembly. The main knife electric mechanism 18 drives the rotation of the two post insulators 14 through the main knife side transmission assembly, thereby realizing the opening and closing of the disconnector. The vertical link 20, the left earthing knife crank arm 3 and the right earthing knife crank arm 6 at the output end of the earthing knife electric mechanism 19 constitute the earthing knife side transmission assembly. The earthing knife electric mechanism 19 drives the opening and closing of the left earthing knife 4 and the right earthing knife 5 through the earthing knife side transmission assembly.
[0028] The upper end of the post insulator 14 is fixedly installed with a main conductor, which includes a finger-side conductor 7 and a contact-side conductor 8. One end of the finger-side conductor 7 is fixed to the upper end of the left post insulator 14, and one end of the contact-side conductor 8 is fixed to the upper end of the right post insulator 14. Both the finger-side conductor 7 and the contact-side conductor 8 adopt a special-shaped aluminum profile structure. According to the skin effect principle, the main conductor of the present utility model has a large heat dissipation area, which can avoid material waste while ensuring current conduction.
[0029] As Figure 2 shown, the end of the other end of the finger-side conductor 7 has a rod-shaped self-acting finger 23, and the rod-shaped self-acting finger 23 is made of a copper alloy with high elasticity and high conductivity; as Figure 4 、 Figure 5As shown, the rod-shaped self-acting finger 23 has a long contact surface, effectively improving the fault tolerance rate of the contact surface. The end of the other end of the contact-side conductor 8 has a contact 24. When the rod-shaped self-acting finger 23 contacts the contact 24, the disconnector is in the closed state. The deformation of the rod-shaped self-acting finger 23 itself provides a reliable clamping force for the closing of the disconnector. The outer surfaces of the rod-shaped self-acting finger 23 and the contact 24 are silver-plated. The rod-shaped self-acting finger 23 is formed by bending a copper rod. The rod-shaped self-acting fingers 23 at the other ends of the finger-side conductors 7 are symmetrically arranged. In this way, the end of the rod-shaped self-acting finger 23 that contacts the contact 24 is in a horn shape, which has a guiding effect and facilitates the smooth engagement of the contact 24 and the rod-shaped self-acting finger 23. At the same time, after the closing is completed, a certain clamping force is provided for the closing through the self-deformation of the rod-shaped self-acting finger 23.
[0030] The other end of the finger-side conductor 7 has a finger-side grading ring 11, and the other end of the contact-side conductor 8 has a contact-side grading ring 10. The contact-side grading ring 10, the finger-side grading ring 11, the grading ring assembly, the lower grading ring 12 of the terminal block and the upper grading ring 9 of the terminal block constitute the grading ring assembly. The design of the grading ring on the disconnector is prior art and will not be elaborated here.
[0031] There is a locking assembly between the end of the finger-side conductor 7 and the end of the contact-side conductor 8, such as Figure 3a and Figure 3b As shown, the locking assembly includes a hook plate bracket 71 and a conductive hook plate 81. The hook plate bracket 71 is fixed to the end of the finger-side conductor 7, and the conductive hook plate 81 is fixed to the end of the contact-side conductor 8. After closing, the conductive hook plate 81 hooks the hook plate bracket 71 to prevent the rod-shaped self-acting finger 23 and the contact 24 from being separated by the electrodynamic force when a short circuit occurs in the line, thereby ensuring the closing reliability.
[0032] The mechanical interlock assembly is installed on the base 15. The mechanical interlock assembly includes a locking disc 26, a locking joint 27, a connecting rod 28, a roller 29 and a connecting rod joint 30. There are two locking discs 26. One of the locking discs 26 is fixedly connected to the vertical connecting rod 20 at the output end of the main knife electric mechanism 18. The other locking disc 26 is fixedly connected to the vertical connecting rod 20 at the output end of the earthing knife electric mechanism 19. Further, the locking disc 26 is indirectly fixedly connected to the post insulator 14. There are two locking joints 27, and they are located below the post insulator 14. One of the locking joints 27 is located on the side where the main knife electric mechanism 18 is located, and the other locking joint 27 is located on the side where the earthing knife electric mechanism 19 is located. One end of the locking joint 27 is hinged to the mounting bracket 25, and the mounting bracket 25 is fixed on the base 15. There is a connecting rod 28 between the other ends of the two locking joints 27. Both ends of the connecting rod 28 have connecting rod joints 30. The connecting rod joints 30 are threadedly connected to the connecting rod 28. Further, the distance between the connecting rod joint 30 and the connecting rod 28 is adjustable. The connecting rod joint 30 at the left end of the connecting rod 28 is hinged to the other end of the locking joint 27 on the side of the main knife electric mechanism 18, and the connecting rod joint 30 at the right end of the connecting rod 28 is hinged to the other end of the locking joint 27 on the side of the earthing knife electric mechanism 19. There is a roller 29 on the locking joint 27, and when the roller 29 contacts the locking disc 26, it is in a line contact mode. The edge of the locking disc 26 has a limit groove. The locking joint 27, the connecting rod 28 and the connecting rod joint 30 form a swing arm structure, which converts the horizontal force into the rotational movement of the locking structure. As Figure 8 shown, when the disconnector is in the closed position, the part of the locking disc 26 on the side of the main knife electric mechanism 18 except the limit groove contacts the roller 29 on the corresponding locking joint 27, and the roller 29 on the locking joint 27 on the side of the earthing knife electric mechanism 19 is located in the limit groove of the corresponding locking disc 26, so that the earthing switch cannot be closed. On the contrary, when the earthing switch is in the closed position, the part of the locking disc 26 on the side of the earthing knife electric mechanism 19 except the limit groove contacts the roller 29 on the corresponding locking joint 27, and the roller 29 on the locking joint 27 on the side of the main knife electric mechanism 18 is located in the limit groove of the corresponding locking disc 26, so that the disconnector cannot be closed. During operation, except for the roller 29, no other structural components of the mechanical interlock assembly contact the locking disc 26, effectively reducing the friction area and greatly reducing the jamming and deformation problems existing in the current 550 kV disconnector lock.
[0033] The working principle of the present utility model will be described below:
[0034] (1) When the disconnector switch is closed, the main knife electric mechanism 18 operates, driving the main knife side vertical connecting rod 20 to rotate clockwise by 180°, driving the left bearing seat 31 and the main knife side post insulator 14 to rotate clockwise by 90° through the main knife crank arm 1, driving the finger side conductor 7 to rotate clockwise by 90°; driven by the inter-pole connecting rod 2, the right bearing seat 31 and the earthing knife side post insulator 14 rotate counterclockwise by 90°, driving the contact side conductor 8 to rotate counterclockwise by 90°; the finger side conductor 7 and the contact side conductor 8 move synchronously, and the rod-shaped self-acting finger 23 at the other end of the finger side conductor 7 approaches the contact 24 at the other end of the contact side conductor 8 until the contact 24 contacts the rod-shaped self-acting finger 23, thus realizing the entire closing operation of the conductive system.
[0035] (2) When the disconnector switch is opened, the main knife electric mechanism 18 operates, driving the main knife side vertical connecting rod 20 to rotate counterclockwise by 180°, driving the left bearing seat 31 and the main knife side post insulator 14 to rotate counterclockwise by 90° through the main knife crank arm 1, driving the finger side conductor 7 to rotate counterclockwise by 90°; driven by the inter-pole connecting rod 2, the right bearing seat 31 and the earthing knife side post insulator 14 rotate clockwise by 90°, driving the contact side conductor 8 to rotate clockwise by 90°; the finger side conductor 7 and the contact side conductor 8 move synchronously, and the rod-shaped self-acting finger 23 at the other end of the finger side conductor 7 moves away from the contact 24 at the other end of the contact side conductor 8 until the contact 24 is parallel to the rod-shaped self-acting finger 23, thus realizing the entire opening operation of the conductive system.
[0036] The structure of the rod-shaped self-acting finger on the main conductor of the present utility model has a large contact length with the contact, and its own deformation ensures the clamping force during contact, thereby ensuring the reliability of conductive closing and improving the debugging fault tolerance rate. Moreover, when the mechanical interlock component works, only the roller contacts the locking disc, effectively reducing the friction area, and can effectively reduce the jamming risk existing in the current 550KV disconnector interlock.
Claims
1. A 550 kV double-column horizontally rotating disconnector, comprising a base, an insulating assembly and a main electrical conduction part. There is a main knife electric mechanism on the base. The insulating assembly includes two post insulators. The lower ends of the post insulators are rotatably installed on the base through bearing seats. The main knife electric mechanism drives the rotation of the two post insulators through a main knife side transmission assembly. The main electrical conduction part includes a finger side electrical conduction part and a contact side electrical conduction part. One end of the finger side electrical conduction part and one end of the contact side electrical conduction part are fixed to the upper ends of the corresponding post insulators. It is characterized in that, The other end of the finger-side conductor has a rod-shaped self-acting finger, and the other end of the contact-side conductor has a contact; further comprising a mechanical interlock assembly, the mechanical interlock assembly includes a locking disc, a connecting rod and a locking joint. A locking disc is fixed to the lower end of each of the post insulators, and a locking joint is provided below each of the post insulators. An installation bracket is provided on the base. One end of the locking joint is hingedly connected to the installation bracket. The connecting rod is located between the other ends of the two locking joints, and the other ends of the locking joints are hingedly connected to the corresponding ends of the connecting rod. The locking joint has a roller, and the edge of the locking disc has a limiting groove; when the roller on one of the locking joints is located in the limiting groove of the corresponding locking disc, the roller on the other locking joint contacts the side wall of the corresponding locking disc other than the limiting groove.
2. The 550 kV double-column horizontal rotary disconnector according to claim 1, characterized in that, Both ends of the connecting rod are threadedly installed with connecting rod joints, and the connecting rod is hingedly connected to the corresponding locking joint through the connecting rod joints.
3. A 550 kV double-column horizontal rotary disconnector according to claim 1, characterized in that, Further comprising a locking assembly, the locking assembly includes a hook plate bracket and a conductive hook plate. The hook plate bracket is fixed to the other end of the finger-side conductor, and the conductive hook plate is fixed to the other end of the contact-side conductor. When the conductive hook plate hooks the hook plate bracket, the main conduction is locked.
4. A 550 kV double-column horizontal rotary disconnector according to claim 1, characterized in that, The main knife side transmission assembly includes an inter-pole connecting rod. One end of the inter-pole connecting rod is hingedly connected to the lower end of one of the post insulators, and the other end of the inter-pole connecting rod is hingedly connected to the lower end of the other post insulator. The synchronous and reverse rotation of the two post insulators is achieved through the inter-pole connecting rod.
5. A 550 kV double-column horizontal rotary disconnector according to claim 4, characterized in that, One end of the inter-pole connecting rod has a bent joint, and the bent joint is hingedly connected to the lower end of one of the post insulators.
6. The 550 kV double-column horizontally rotatable disconnector according to claim 5, characterized in that, The other end of the inter-pole connecting rod has a U-bolt clamp, and the U-bolt clamp is fixedly connected to the other end of the inter-pole connecting rod and is hingedly connected to the lower end of the other post insulator at the same time.
7. A 550 kV double-column horizontal rotary disconnector according to claim 4, characterized in that, The main knife side transmission assembly further includes a vertical connecting rod and a main knife crank arm. The lower end of the vertical connecting rod is fixedly connected to the output end of the main knife electric mechanism, and the upper end of the vertical connecting rod is connected to one of the post insulators through the main knife crank arm.
8. A 550 kV double-column horizontal rotary disconnector according to claim 1, characterized in that, Further comprising a grounding switch, the grounding switch includes a left grounding knife, a right grounding knife, a grounding knife electric mechanism and a grounding knife transmission assembly. The grounding knife electric mechanism is fixed on the base, and the left grounding knife and the right grounding knife are driven to swing through the grounding knife transmission assembly.