Single-pendulum type outdoor isolating load switch

Abstract

The application provides a single pendulum type outdoor isolated load switch, which comprises a switch base, a static side insulation support assembly, a dynamic side insulation support assembly, a static contact assembly, a dynamic contact assembly, a main shaft and an arc guiding protection assembly. The static side insulation support assembly is fixed on the switch base, the dynamic side insulation support assembly is fixed on the main shaft, and the dynamic contact assembly rotates with the main shaft to make a single pendulum movement between the closed and open positions. The static contact assembly comprises a static contact plate and a split contact finger assembly, the split contact finger assembly is composed of two groups of split contact finger units, and forms an elastic clamping structure through elastic elements, which is used for forming multi-point contact with the dynamic contact assembly in the closed state. The arc guiding protection assembly is arranged on the static contact assembly and the dynamic contact assembly, and is used for guiding the arc action area during the closing and opening process. The single pendulum movement structure and the elastic clamping contact structure are matched to improve the contact stability, and the arc guiding protection structure reduces the influence of the arc on the main contact.

Description

Technical Field

[0001] This application relates to the field of outdoor electrical switchgear technology, and in particular to a single-pendulum type outdoor isolating load switch. Background Technology

[0002] Outdoor disconnect load switches are switching devices that combine circuit isolation and load current switching functions. They are commonly used in urban rail transit, outdoor power distribution, and other power supply systems requiring visible isolation. These switches must maintain sufficient electrical isolation between the moving and stationary contacts when open, and must continuously carry the rated current when closed, reliably connecting or disconnecting load current during operation. Therefore, compared to ordinary disconnect switches used only for no-load isolation, outdoor disconnect load switches place higher demands on contact performance and arc protection capabilities.

[0003] Existing outdoor disconnect load switches typically achieve main circuit conduction through contact assemblies and rely on the contact pressure between contacts to ensure stable current transmission. Some existing switches use an integral contact structure for the stationary contact, with the moving contact relying primarily on a limited contact area for conductive connection with the stationary contact. During long-term operation, the contact assembly is affected by outdoor environmental factors such as vibration, temperature changes, and contact wear, which can easily lead to a reduction in the actual contact area involved in conduction, insufficient contact in some areas, or even loss of contact, thus reducing the conductivity stability of the main circuit. Furthermore, due to the limited number of contact points, localized wear or ablation of the contact surface can directly affect overall conductivity, leading to increased contact resistance, increased heat generation, and reduced operational reliability.

[0004] Furthermore, outdoor disconnecting load switches inevitably generate electric arcs during the connection or disconnection of load current. Some existing switches primarily rely on the main contacts to directly handle current connection and disconnection, lacking effective arc transfer and extinguishing protection measures. The high temperature generated by the arc can cause localized ablation, metal melting, and oxidation on the contact surface, leading to roughening of the contact surface, increased contact resistance, and intensified heating. This not only increases the temperature rise during subsequent operation but may also shorten the service life of the contact assembly. With the increase in the number of opening and closing cycles, the aforementioned arcing effects gradually accumulate and accelerate the deterioration of the main contact performance, making the main contacts one of the main failure points in the switch. Summary of the Invention

[0005] This application provides a single-pendulum type outdoor disconnect load switch to solve the problems of insufficient contact reliability and weak arc protection capability of existing outdoor disconnect load switches during load current switching.

[0006] This application provides a single-pendulum type outdoor disconnect load switch, including a switch base frame, a stationary side insulation support assembly, a moving side insulation support assembly, a stationary contact assembly, a moving contact assembly, a main shaft, and an arc ignition protection assembly; The stationary side insulation support assembly is fixedly mounted on the switch base frame, and the stationary contact assembly is located at the top of the stationary side insulation support assembly. The main shaft is rotatably mounted on the switch base frame, and a moving side insulation support assembly is fixedly connected to the main shaft. The moving contact assembly is located at the top of the moving side insulation support assembly. The main shaft is used for transmission connection with the operating mechanism and can drive the moving side insulation support assembly to swing during rotation, so that the moving contact assembly relative to the stationary contact assembly performs a pendulum-like opening and closing motion between the closed conducting position and the open isolating position. The contact assembly includes a stationary contact plate and a separate contact finger assembly disposed on the stationary contact plate facing the side of the moving contact assembly in the direction of swinging and closing. The separate contact finger assembly is used to form an elastic pressing contact when the moving contact assembly and the stationary contact assembly are in the closed and conducting position. The separate contact finger assembly includes two sets of spaced separate contact finger units that form an elastic clamping structure through multiple sets of spring assemblies. The arc-inducing protection assembly is disposed on the stationary contact assembly and the moving contact assembly and is used to guide the arc away from the contact area between the stationary contact assembly and the moving contact assembly during the opening and closing process.

[0007] In one optional embodiment, the arc-starting protection assembly includes a stationary arc-starting rod and a movable arc-starting rod, wherein the stationary arc-starting rod is disposed on the stationary contact assembly and the movable arc-starting rod is disposed on the movable contact assembly; The arc-starting protection component is configured such that, during the opening process, the stationary arc-starting rod and the moving arc-starting rod can separate again after the stationary contact assembly and the moving contact assembly are separated; during the closing process, the stationary arc-starting rod and the moving arc-starting rod can make contact before the stationary contact assembly and the moving contact assembly make contact.

[0008] In one optional embodiment, the static arc-starting rod and the dynamic arc-starting rod are made of copper-chromium alloy, and the static arc-starting rod and the dynamic arc-starting rod are in line contact fit.

[0009] In one optional embodiment, each set of the split contact finger units includes multiple independently arranged contact fingers and a connecting shaft passing through the multiple contact fingers. The connecting shaft passes through one end of the contact fingers near the stationary contact plate. The multiple contact fingers are arranged sequentially at intervals along the axial direction of the connecting shaft. A gap is formed between two adjacent contact fingers to accommodate a spring assembly. The spring assembly is connected between two sets of the split contact finger units. The split-type finger assembly also includes two end connecting plates, which are respectively disposed at both ends of the split-type finger unit, and each end connecting plate is connected to the connecting shaft of the two split-type finger units, so that the two split-type finger units form an integrated finger clamping structure.

[0010] In one optional embodiment, the number of contact fingers in each group of separate contact finger units is an even number, and the number of spring assemblies is half the number of contact fingers in each group of separate contact finger units; multiple groups of spring assemblies are evenly spaced, and multiple groups of spring assemblies are connected to two groups of separate contact finger units through the gaps between the contact fingers, and can enable the two groups of separate contact finger units to elastically clamp the moving contact assembly towards each other in the closed state.

[0011] In one optional embodiment, the spring assembly includes a spring body and two spring connecting shafts respectively disposed at the upper and lower ends of the spring body. The contact finger is provided with an arc-shaped groove adapted to the spring connecting shaft. The spring connecting shaft overlaps in the arc-shaped groove of the corresponding contact finger on its side. The middle section of the spring connecting shaft is provided with an annular limiting groove for engaging with the spring body. Both ends of each spring connecting shaft simultaneously overlap in the arc-shaped grooves of two adjacent contact fingers of the same side split contact finger unit, so that the spring body is in a pre-tightened elastic tension state to maintain continuous contact between the spring connecting shaft and the arc-shaped groove.

[0012] In one alternative implementation, each set of the split contact finger units includes sixteen contact fingers, and the spring assembly is configured in eight groups, with each pair of contact fingers corresponding to one group of the spring assembly.

[0013] In one optional embodiment, the stationary side insulation support assembly includes a stationary insulator and a stationary contact fixing plate. The stationary insulator is fixedly mounted on the switch base frame, and the stationary contact fixing plate is disposed at the top of the stationary insulator. The stationary contact plate of the stationary contact assembly is connected to the stationary contact fixing plate. The moving side insulation support assembly includes a moving insulator, a rotating plate assembly, and a moving contact fixing plate. The rotating plate assembly is fixedly connected to the main shaft, the moving insulator is disposed on the rotating plate assembly, the moving contact fixing plate is disposed at the top of the moving insulator, the moving contact plate of the moving contact assembly is connected to the moving contact fixing plate, and the rotating plate assembly is hinged to the switch base frame.

[0014] In one optional embodiment, the rotating plate assembly is a bracket structure with a hinged lug on one side, and an auxiliary spring assembly is provided inside the switch base; the rotating plate assembly is hinged to the auxiliary spring assembly through the hinged lug. The assist spring assembly includes an assist spring body and a hinged connecting seat disposed at one end of the assist spring body. The hinged connecting seat is hinged to a hinged ear seat, and the other end of the assist spring body is mounted on a support seat inside the switch base.

[0015] In one optional embodiment, the static contact plate, the moving contact plate, and the fingers of the separate contact finger assembly are all made of T2 conductive copper material and are silver-plated on the surface, with a silver plating layer thickness of not less than 6μm.

[0016] Compared with the prior art, this application has the following beneficial effects: 1. This application provides a pendulum-type outdoor disconnect load switch. The stationary side insulation support assembly is fixedly mounted on the switch base frame, and the stationary contact assembly is installed at the top of the stationary side insulation support assembly. The moving side insulation support assembly is fixedly connected to a main shaft rotatably mounted on the switch base frame and swings synchronously with the main shaft. The moving contact assembly is located at the top of the moving side insulation support assembly. Driven by an external operating mechanism, the main shaft drives the moving side insulation support assembly to swing around its rotation center, causing the moving contact assembly to perform a pendulum-like motion relative to the stationary contact assembly between the closed conducting position and the open isolating position. Since the movement mode and direction of the moving contact assembly are determined by the rotation of the main shaft, its approach to and departure from the stationary contact assembly have a relatively clear motion law. This is beneficial for maintaining a relatively consistent entry and exit state of the moving contact assembly during multiple opening and closing processes, thereby providing stable mechanical motion conditions for subsequent contact processes.

[0017] 2. This application provides a split contact finger assembly on the side of the stationary contact plate facing the direction of the moving contact assembly's closing movement. The split contact finger assembly consists of two sets of opposing split contact finger units, which are elastically connected by multiple sets of spring assemblies. When the moving contact assembly swings to the closing position, it gradually enters between the two sets of split contact finger units. Under the action of the spring assemblies, the two sets of split contact finger units undergo opposing elastic deformation and form a clamping contact with the moving contact assembly from opposite sides. Since the split contact finger assembly is formed by multiple contact points participating in the contact action, and the spring assemblies continuously provide elastic force, the split contact finger assembly can be adjusted within a certain range according to the actual contact situation. When the moving contact assembly undergoes a slight positional change due to assembly errors, operational vibration, or long-term use, the split contact finger assembly can still maintain contact with the moving contact assembly, thereby helping to reduce the impact of uneven local contact pressure or reduced contact area, and ensuring that the main circuit maintains a relatively stable conductive contact state in the closed state. Meanwhile, the multi-point distributed contact method helps to reduce the excessive contact load in local areas, which has a positive effect on reducing contact resistance fluctuations and reducing the risk of abnormal heating.

[0018] 3. This application incorporates arc-starting protection components on both the stationary and moving contact assemblies. During the opening process, as the moving and stationary contact assemblies gradually separate, the arc can be redirected away from the main contact area under the action of the arc-starting protection component. During the closing process, the arc-starting protection component can also preferentially participate in the contact or transition conduction process, allowing the main contact area to primarily assume the function of stable conduction. By appropriately distinguishing the main contact function from the arc-affected area, this application reduces the prolonged direct impact of the arc on the main contact surface, thereby mitigating the ablation, oxidation, and melting effects caused by the high temperature of the arc on the contact surface. The separate contact finger assembly and the arc-starting protection component respectively undertake the functions of conductive contact and arc guiding. Their cooperation helps maintain a good working condition of the contact area, slowing down the decline in contact performance caused by frequent opening and closing, thus improving the reliability of the outdoor disconnecting load switch during long-term operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of a pendulum-type outdoor disconnect load switch provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a split-type finger assembly provided in an embodiment of this application; Figure 3 for Figure 1 A magnified view of a portion of point A in the middle; Figure 4 for Figure 2 A magnified view of a portion of point B in the middle; Figure 5 This is a front view of the installation of a pendulum-type outdoor disconnect load switch on a steel column according to an embodiment of this application; Figure 6 This is a side view of the installation of a pendulum-type outdoor isolating load switch on a steel column, according to an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 100-Switch base frame; 200-Static side insulation support assembly; 210-Static insulator; 220-Static contact fixing plate; 300-Moving side insulation support assembly; 310-Moving insulator; 320-Turn plate assembly; 321-Hinge lug; 330-Moving contact fixing plate; 400-Static contact assembly; 410-Static contact plate; 420-Split contact finger assembly; 421-Split contact finger unit; 4211-Contact finger; 4212-Connecting shaft; 422-End connecting plate; 500-Moving contact assembly; 510-Moving contact plate; 600-Main shaft; 700-Archive protection assembly; 701-Static arc-starting rod; 702-Moving arc-starting rod; 800-Spring assembly; 810-Spring body; 820-Spring connecting shaft; 900-Auxiliary spring assembly; 910-Auxiliary spring body; 920-Hinge connecting seat; 10 - Connecting flange crank; 20 - Operating mechanism; 30 - Connecting steel pipe; 40 - Intermediate support. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0023] like Figures 1-4 As shown in the figure, this application provides a single-pendulum outdoor disconnect load switch, including a switch base frame 100, a stationary side insulation support assembly 200, a moving side insulation support assembly 300, a stationary contact assembly 400, a moving contact assembly 500, a main shaft 600, and an arc protection assembly 700.

[0024] The stationary side insulation support assembly 200 is fixedly mounted on the switch base frame 100, and the stationary contact assembly 400 is mounted on the top of the stationary side insulation support assembly 200. The main shaft 600 is rotatably mounted on the switch base frame 100, and the moving side insulation support assembly 300 is fixedly connected to the main shaft 600. The moving contact assembly 500 is mounted on the top of the moving side insulation support assembly 300. The main shaft 600 is used for transmission connection with an external operating mechanism and can drive the moving side insulation support assembly 300 to swing when rotating, so that the moving contact assembly 500 relative to the stationary contact assembly 400 performs a pendulum-like opening and closing motion between the closed conducting position and the open isolation position.

[0025] The stationary contact assembly 400 includes a stationary contact plate 410 and a separate contact finger assembly 420 disposed on the stationary contact plate 410 facing the side of the moving contact assembly 500 in the swing closing direction. The separate contact finger assembly 420 is used to form an elastic pressing contact when the moving contact assembly 500 and the stationary contact assembly 400 are in the closed conducting position. The separate contact finger assembly 420 includes two sets of spaced separate contact finger units 421. The two sets of separate contact finger units 421 are connected by multiple sets of spring assemblies 800 to form an elastic clamping structure, so that the two sets of separate contact finger units 421 can generate opposite elastic deformation during the entry of the moving contact assembly 500 and form a two-sided clamping contact with the moving contact assembly 500. The arc protection assembly 700 is disposed on the stationary contact assembly 400 and the moving contact assembly 500 and is used to guide the arc away from the contact area between the stationary contact assembly 400 and the moving contact assembly 500 during the opening and closing process.

[0026] In this embodiment, the stationary side insulation support assembly 200 is fixedly mounted on the switch base frame 100, and the stationary contact assembly 400 is mounted on the top of the stationary side insulation support assembly 200. The moving side insulation support assembly 300 is fixedly connected to the main shaft 600, which is rotatably mounted on the switch base frame 100, and swings synchronously with the main shaft 600. The moving contact assembly 500 is mounted on the top of the moving side insulation support assembly 300. Driven by an external operating mechanism, the main shaft 600 drives the moving side insulation support assembly 300 to swing around its rotation center, causing the moving contact assembly 500 to perform a pendulum-like motion relative to the stationary contact assembly 400 between the closed conducting position and the open isolation position. Since the movement mode and direction of the moving contact assembly 500 are determined by the rotation of the main shaft 600, its approach to and departure from the stationary contact assembly 400 have a relatively clear motion law. This is beneficial for the moving contact assembly 500 to maintain a relatively consistent entry and exit state during multiple opening and closing processes, thereby providing stable mechanical motion conditions for the subsequent contact process.

[0027] Based on the above structure, a split contact finger assembly 420 is provided on the side of the stationary contact plate 410 facing the closing direction of the moving contact assembly 500. The split contact finger assembly 420 consists of two sets of opposing split contact finger units 421, which are elastically connected by multiple sets of spring assemblies 800. When the moving contact assembly 500 swings to the closing position, it gradually enters between the two sets of split contact finger units 421. Under the action of the spring assemblies 800, the two sets of split contact finger units 421 undergo opposing elastic deformation and form a clamping contact with the moving contact assembly 500 from opposite sides. Since the split contact finger assembly 420 is formed by multiple contact points participating in the contact action, and the spring assemblies 800 continuously provide elastic force, the split contact finger assembly 420 can be adjusted within a certain range according to the actual contact situation. When the moving contact assembly 500 undergoes slight positional changes due to assembly errors, operational vibrations, or long-term use, the separate contact finger assembly 420 can still maintain contact with the moving contact assembly 500. This helps reduce the impact of uneven local contact pressure or reduced contact area, ensuring a relatively stable conductive contact state in the main circuit under closed conditions. Simultaneously, the multi-point distributed contact method helps reduce excessive contact loads in localized areas, positively impacting contact resistance fluctuations and mitigating the risk of abnormal heating.

[0028] To mitigate the impact of electric arc on the main contact contact area during opening and closing, this embodiment also includes an arc-initiating protection component 700 on the stationary contact assembly 400 and the moving contact assembly 500. During opening, as the moving contact assembly 500 gradually separates from the stationary contact assembly 400, the electric arc can be transferred away from the main contact contact area under the action of the arc-initiating protection component 700. During closing, the arc-initiating protection component 700 can also preferentially participate in the contact or transition conduction process, allowing the main contact contact area to bear more of the stable conduction function. By appropriately distinguishing the main contact contact function from the arc action area, this embodiment can reduce the situation where the arc directly acts on the main contact contact surface for a long time, thereby reducing the ablation, oxidation, and melting effects of the high temperature of the arc on the contact surface. The separate contact finger assembly 420 and the arc-initiating protection component 700 respectively undertake the functions of conductive contact and arc guiding. The two work together to help maintain a good working condition of the contact area, slow down the decline in contact performance caused by frequent opening and closing, and thus improve the reliability of the outdoor disconnecting load switch during long-term operation.

[0029] It should be noted that in this manual, "stationary side" refers to the side that remains fixed relative to the switch base 100 during the opening and closing process, and "moving side" refers to the side that swings relative to the stationary side under the drive of the main shaft 600. The directional terms such as "upper," "lower," "top," and "one side" are for illustrative purposes only and should not be construed as an absolute limitation on the actual installation direction of the product.

[0030] It should be further explained that the external operating mechanism connected to the main shaft 600 is mainly used to output the driving force required for opening or closing the circuit breaker and to transmit the corresponding mechanical action to the main shaft 600. This type of operating mechanism and its transmission connection with the switch main shaft have been widely and maturely applied in switchgear such as disconnect switches and load switches. Its specific form can be selected according to the installation location, operating method, and driving force requirements. For example, the operating mechanism can be a manual operating mechanism, an electric operating mechanism, or an operating mechanism that combines manual and electric functions, and can be connected to the main shaft 600 via a crank, connecting rod, connecting pipe, flange connection, or a combination of the above components. The operating mechanism only needs to be able to drive the main shaft 600 to rotate in the opening or closing direction, so that the moving side insulation support assembly 300 and the moving contact assembly 500 complete the corresponding pendulum-type opening and closing motion. Since the specific structure of the operating mechanism is not the main improvement of this embodiment, those skilled in the art can select and connect it according to the structure of existing switch operating mechanisms and on-site installation conditions; therefore, its internal composition will not be further described here.

[0031] In some embodiments, the arc-starting protection assembly 700 includes a stationary arc-starting rod 701 and a movable arc-starting rod 702. The stationary arc-starting rod 701 is disposed on the stationary contact assembly 400, and the movable arc-starting rod 702 is disposed on the movable contact assembly 500.

[0032] The arc-starting protection assembly 700 is configured such that, during the opening process, the stationary arc-starting rod 701 and the moving arc-starting rod 702 can separate again after the stationary contact assembly 400 and the moving contact assembly 500 separate; and during the closing process, the stationary arc-starting rod 701 and the moving arc-starting rod 702 can make contact before the stationary contact assembly 400 and the moving contact assembly 500 make contact.

[0033] During the opening process, the moving contact assembly 500 gradually separates from the stationary contact assembly 400 under the drive of the main shaft 600. Because the stationary arc-initiating rod 701 and the moving arc-initiating rod 702 are spatially offset from the main contact contact area, when the main contact contact area is completely separated, the arc-initiating rods remain relatively close and continue to interact relative to each other as the moving contact assembly 500 moves. This allows the arc to form and persist between the arc-initiating rods after the main contacts separate. This structure gives the arc action area and the main contact contact area a relatively partitioned characteristic during the opening process, thus helping to reduce the direct impact time of the arc on the main contact contact surface.

[0034] During the closing process, the moving contact assembly 500 drives the moving arc-initiating rod 702 to simultaneously approach the stationary contact assembly 400. The approach process between the stationary arc-initiating rod 701 and the moving arc-initiating rod 702 enters the contact state earlier than the main contact contact area, so that the arc-initiating rods form a conductive contact before the main contacts, and then the main contacts enter a stable conductive state. This contact sequence allows the current to undergo a certain transition between the arc-initiating rods in the initial stage of closing, so that the current change borne by the main contacts at the moment of contact is relatively gradual, which helps to reduce the impact effect in the initial contact stage.

[0035] In this embodiment, through the above-described structural arrangement, the arc-starting protection component 700 utilizes the spatial positional difference between the static arc-starting rod 701 and the dynamic arc-starting rod 702 to achieve zoned cooperation with the main contact contact area, so that the arc effect is more distributed between the arc-starting rods and its direct impact on the main contact contact surface is reduced to a certain extent. This helps to maintain the stability of the main contact contact state and reduces the possibility that the contact performance will deteriorate significantly with the increase of the number of opening and closing cycles.

[0036] In some embodiments, the stationary arc-starting rod 701 and the moving arc-starting rod 702 are made of copper-chromium alloy, and the stationary arc-starting rod 701 and the moving arc-starting rod 702 are in line contact fit.

[0037] In the above embodiments, the static arc-initiating rod 701 and the dynamic arc-initiating rod 702 are made of copper-chromium alloy material. This material has a relatively balanced material property between conductivity and resistance to arc erosion, and is suitable for working conditions that can withstand instantaneous current changes and arc effects during the opening and closing process.

[0038] Structurally, the static arc-initiating rod 701 and the dynamic arc-initiating rod 702 employ a line contact fit structure, forming a contact area extending along the length direction when they come into contact. Compared to point contact, this line contact structure allows the contact effect to be distributed along the contact length direction, enabling the current to be transmitted in a dispersed manner at the contact interface, thereby reducing the concentrated load at a single contact point. This structure also provides a certain contact transition zone during the establishment and separation of the arc-initiating contact area, helping to reduce the instantaneous heat concentration phenomenon in the local contact area.

[0039] In some embodiments, each set of separate finger units 421 includes multiple independently arranged fingers 4211 and a connecting shaft 4212 passing through the multiple fingers 4211. The connecting shaft 4212 passes through one end of the fingers 4211 near the stationary contact plate 410. The multiple fingers 4211 are arranged sequentially at intervals along the axial direction of the connecting shaft 4212. A gap is formed between two adjacent fingers 4211 that can be used to install a spring assembly 800. The spring assembly 800 is connected between the two sets of separate finger units 421.

[0040] The split finger assembly 420 also includes two end connecting plates 422, which are respectively disposed at both ends of the split finger unit 421, and each end connecting plate 422 is connected to the connecting shaft 4212 of the two split finger units 421, so that the two split finger units 421 form an integrated finger clamping structure.

[0041] In the above embodiment, each set of separate contact finger units 421 includes multiple independently arranged contact fingers 4211 and a connecting shaft 4212. Each contact finger 4211 has a connecting hole at one end near the stationary contact plate 410 for the connecting shaft 4212 to pass through. The connecting shaft 4212 passes sequentially through the multiple contact fingers 4211 in the same set of separate contact finger units 421 and is connected to each contact finger 4211 to form a whole. The connecting shaft 4212 is mainly used for connecting and positioning the multiple contact fingers 4211, so that each contact finger 4211 can maintain a predetermined arrangement relationship along the axial direction of the connecting shaft 4212. At the same time, the contact fingers 4211 and the connecting shaft 4212 are not rigidly fixed, so that the contact fingers 4211 can generate corresponding displacement when subjected to the squeezing action of the moving contact assembly 500, to adapt to positional changes during actual contact. Multiple contact fingers 4211 are arranged at intervals along the axial direction of the connecting shaft 4212 and can participate in contact when the moving contact assembly 500 enters between the two sets of separate contact finger units 421.

[0042] Furthermore, a gap is maintained between adjacent contact fingers 4211 for mounting the spring assembly 800. The spring assembly 800 is connected between the two sets of separate contact finger units 421 via the corresponding gap, so that the mounting position of the spring assembly 800 matches the arrangement position of the contact fingers 4211. After the moving contact assembly 500 enters between the two sets of separate contact finger units 421, the contact ends of each contact finger 4211 can contact the moving contact assembly 500 at different positions. Compared to a structure where only a single contact point undertakes conductive contact, this spaced arrangement helps to increase the actual contact points and reduce the impact of changes in the contact state of a certain locality on the overall contact state.

[0043] Furthermore, the split contact finger assembly 420 of this embodiment also includes two end connecting plates 422, which are located at both ends of the split contact finger unit 421 along the axial direction of the connecting shaft 4212. Each end connecting plate 422 is connected to the connecting shaft 4212 of the two sets of split contact finger units 421, thereby defining the relative position between the ends of the two connecting shafts 4212 and combining the two sets of split contact finger units 421 into an integral contact finger clamping structure that can be installed as a whole. The end connecting plates 422 are mainly used to maintain the assembly relationship of the two sets of split contact finger units 421 on the side near the stationary contact plate 410, reducing the possibility of unexpected displacement of the two sets of connecting shafts 4212 during assembly and use. At the same time, the contact ends of each contact finger 4211 can still form clamping contact with the moving contact assembly 500 under the action of the spring assembly 800. Thus, the split contact finger assembly 420 takes into account both multi-finger spaced contact and overall assembly stability, providing a relatively stable structural foundation for the conductive contact of the moving contact assembly 500 after closing.

[0044] In some embodiments, the number of fingers 4211 in each set of separate finger units 421 is even, and the number of spring assemblies 800 is half the number of fingers 4211 in each set of separate finger units 421; multiple sets of spring assemblies 800 are evenly spaced, and the multiple sets of spring assemblies 800 are connected to two sets of separate finger units 421 through the gaps between the fingers 4211, and can enable the two sets of separate finger units 421 to elastically clamp the moving contact assembly 500 towards each other in the closed state.

[0045] In the above embodiment, the number of fingers 4211 in each set of separate finger units 421 is set to an even number, and the number of spring assemblies 800 is half the number of fingers 4211 in each set of separate finger units 421. According to the above numerical relationship, multiple spring assemblies 800 can be distributed at different positions along the arrangement direction of the fingers 4211. During assembly, the two sets of separate finger units 421 are arranged opposite each other, and each spring assembly 800 is connected between the two sets of separate finger units 421 via the gap reserved between the fingers 4211. Each spring assembly 800 can adopt the same specification and be arranged at equal intervals along the axial direction of the connecting shaft 4212, so that the elastic action position is distributed in different areas of the separate finger assembly 420, rather than being concentrated in the middle or at both ends.

[0046] As the moving contact assembly 500 moves towards the closed position, it gradually enters the space between the two sets of separate contact finger units 421, pushing them to move away from each other. As the distance between the two sets of separate contact finger units 421 increases, the spring assembly 800 connecting them undergoes elastic deformation, applying opposing elastic restoring forces to the two sets of separate contact finger units 421. After the moving contact assembly 500 reaches the closed position, the two sets of separate contact finger units 421 abut against opposite sides of the moving contact assembly 500. The elastic force generated by the spring assembly 800 maintains this abutment, thus forming an elastic clamping effect on the moving contact assembly 500.

[0047] Because the spring assemblies 800 are configured in multiple groups and evenly spaced, the elastic holding force on the two sets of separate contact finger units 421 can be distributed at multiple locations along the arrangement direction of the contact fingers 4211. Compared with a structure that only has elastic elements in a localized area, the above arrangement helps to reduce the situation where the clamping force is excessively concentrated in a certain area of ​​the separate contact finger assembly 420. When there are slight differences in the installation position or contact state of the moving contact assembly 500, the spring assemblies 800 located at different positions can provide elastic force to the corresponding areas respectively, thereby helping to maintain the clamping state of the two sets of separate contact finger units 421 on the moving contact assembly 500 and reducing the adverse effects of insufficient local contact on the overall conductive contact.

[0048] In some embodiments, the spring assembly 800 includes a spring body 810 and two spring connecting shafts 820 respectively disposed at the upper and lower ends of the spring body 810. The contact fingers 4211 are provided with arc-shaped grooves adapted to the spring connecting shafts 820. The spring connecting shafts 820 overlap in the arc-shaped grooves of the corresponding contact fingers 4211 on the same side. The middle section of the shaft of the spring connecting shaft 820 is provided with an annular limiting groove for engaging with the spring body 810. Both ends of each spring connecting shaft 820 overlap in the arc-shaped grooves of two adjacent contact fingers 4211 on the same side of the split contact finger unit 421, so that the spring body 810 is in a pre-tightened elastic tension state, so as to maintain the continuous abutment engagement between the spring connecting shafts 820 and the arc-shaped grooves.

[0049] In the above embodiment, the spring assembly 800 includes a spring body 810 and two spring connecting shafts 820, which are located at the upper and lower ends of the spring body 810, respectively. The upper spring connecting shaft 820 mates with one set of separate contact finger units 421, and the lower spring connecting shaft 820 mates with the other set of separate contact finger units 421. Each contact finger 4211 is provided with an arc-shaped groove adapted to the spring connecting shaft 820. Each spring connecting shaft 820 spans two adjacent contact fingers 4211 on the same side of the separate contact finger unit 421, and its two ends overlap the arc-shaped grooves of the two contact fingers 4211. The arc-shaped grooves support the spring connecting shaft 820 and restrict its installation position on the contact fingers 4211, so that the spring connecting shaft 820 can transmit the elastic force of the spring body 810 to the two adjacent contact fingers 4211.

[0050] The middle section of the spring connecting shaft 820 is provided with an annular limiting groove, and the corresponding end of the spring body 810 is hooked into the annular limiting groove. During assembly, the two spring connecting shafts 820 can be placed in the corresponding arc-shaped grooves of the two sets of separate contact finger units 421, and then the spring body 810 is stretched so that the upper and lower ends of the spring body 810 are hooked into the annular limiting grooves of the two spring connecting shafts 820. The annular limiting groove can axially restrict the hooking position of the spring body 810, reducing the possibility of the end of the spring body 810 moving along the spring connecting shaft 820. After assembly, the spring body 810 is kept in a pre-tight elastic tension state and continuously applies opposing tension to the upper and lower spring connecting shafts 820, so that the two ends of the spring connecting shaft 820 are kept abutting against the corresponding arc-shaped grooves.

[0051] When the moving contact assembly 500 enters between the two sets of separate contact finger units 421, the two sets of separate contact finger units 421 are displaced in a direction away from each other under the squeezing action of the moving contact assembly 500. The tension of the spring body 810 increases accordingly, and the two spring connecting shafts 820 apply opposing elastic restoring actions to the two sets of separate contact finger units 421. Since the spring connecting shafts 820 are set in the arc-shaped groove in an overlapping manner, rather than being rigidly fixed to the contact finger 4211, when the contact finger 4211 undergoes a small displacement, the spring connecting shafts 820 can rotate or adjust their position relative to the arc-shaped groove to adapt to changes in the distance between the two sets of separate contact finger units 421. The pre-tension, the supporting effect of the arc groove, and the restriction of the hanging position by the annular limiting groove work together to help maintain the connection between the spring body 810 and the spring connecting shaft 820, and to make the elastic effect of the spring assembly 800 continuously transmitted to the corresponding contact finger 4211, thereby providing elastic effect for the two sets of separate contact finger units 421 to clamp the moving contact assembly 500.

[0052] In some embodiments, each set of separate finger units 421 includes sixteen fingers 4211, and the spring assembly 800 is configured in eight groups, with each pair of fingers 4211 corresponding to a group of spring assemblies 800.

[0053] In this embodiment, each set of separate finger units 421 includes sixteen fingers 4211, which are arranged sequentially at intervals along the axial direction of the connecting shaft 4212. During assembly, two adjacent fingers 4211 are used as a finger group, thus forming eight finger groups arranged along the axial direction of the connecting shaft 4212 in each set of separate finger units 421. A set of spring assemblies 800 is provided between corresponding finger groups in the two sets of separate finger units 421, for a total of eight sets of spring assemblies 800. Each spring assembly 800 is connected between the two sets of separate finger units 421 via the gap between adjacent fingers 4211, and is arranged sequentially along the arrangement direction of the fingers 4211. The above quantity and correspondence ensure that each pair of adjacent fingers 4211 has a corresponding elastic force application part, and also facilitates the installation and inspection of spring assemblies 800 group by group during the assembly process.

[0054] When the moving contact assembly 500 enters between the two sets of separate contact finger units 421, the two sets of separate contact finger units 421 are displaced in a direction away from each other. The eight sets of spring assemblies 800 then undergo elastic deformation and produce opposing elastic recovery actions at their respective contact finger positions. Since the spring assemblies 800 are distributed at eight positions along the axial direction of the connecting shaft 4212, the elastic clamping action can cover different contact areas of the separate contact finger assembly 420, rather than being concentrated only at a local position. This helps to ensure that the contact fingers 4211 at different positions jointly participate in clamping the moving contact assembly 500, and reduces the situation where large differences in local clamping force are caused by excessive concentration of elastic action positions, thus enabling the moving contact assembly 500 to obtain a more stable clamping contact when it is in the closed position.

[0055] In some embodiments, the stationary side insulation support assembly 200 includes a stationary insulator 210 and a stationary contact fixing plate 220. The stationary insulator 210 is fixedly mounted on the switch base frame 100, and the stationary contact fixing plate 220 is disposed at the top of the stationary insulator 210. The stationary contact plate 410 of the stationary contact assembly 400 is connected to the stationary contact fixing plate 220.

[0056] The moving side insulation support assembly 300 includes a moving insulator 310, a rotating plate assembly 320, and a moving contact fixing plate 330. The rotating plate assembly 320 is fixedly connected to the main shaft 600. The moving insulator 310 is disposed on the rotating plate assembly 320. The moving contact fixing plate 330 is disposed on the top of the moving insulator 310. The moving contact plate 510 of the moving contact assembly 500 is connected to the moving contact fixing plate 330. The rotating plate assembly 320 is hinged to the switch base frame 100.

[0057] In the above embodiment, the stationary side insulation support assembly 200 includes a stationary insulator 210 and a stationary contact fixing plate 220. The lower end of the stationary insulator 210 is fixedly installed on the switch base frame 100. Specifically, a mounting bracket can be provided on the switch base frame 100 for installing the stationary insulator 210. The stationary contact fixing plate 220 is installed on the top end of the stationary insulator 210, and the stationary contact plate 410 is connected to the stationary contact fixing plate 220. The stationary insulator 210 is used to form an insulating gap between the stationary contact assembly 400 and the switch base frame 100, and to bear the mechanical load generated by the stationary contact assembly 400 during its own weight, contact force, and switch operation. The stationary contact fixing plate 220 serves as a mounting component between the stationary insulator 210 and the stationary contact plate 410, and can be connected to both of them respectively by fasteners to facilitate the positioning and disassembly of the stationary contact plate 410. After installation, the stationary contact assembly 400 remains fixed relative to the switch base 100, providing a relatively stable stationary side contact portion for the closing contact of the moving contact assembly 500.

[0058] The moving-side insulation support assembly 300 includes a moving insulator 310, a rotating plate assembly 320, and a moving contact fixing plate 330. The rotating plate assembly 320 is fixedly connected to the main shaft 600 and forms a rotatable hinge with the switch base 100. The lower end of the moving insulator 310 is mounted on the rotating plate assembly 320, the moving contact fixing plate 330 is disposed at the top of the moving insulator 310, and the moving contact plate 510 is connected to the moving contact fixing plate 330. The moving insulator 310 is located between the rotating plate assembly 320 and the moving contact assembly 500, serving both to support the moving contact assembly 500 and to maintain electrical insulation between the moving contact plate 510 and the main shaft 600 and the switch base 100. The moving contact fixing plate 330 can be fastened to the moving insulator 310 and the moving contact plate 510 respectively by fasteners, so that the moving contact plate 510, the moving contact fixing plate 330, the moving insulator 310 and the rotating plate assembly 320 form a moving side structure that can swing together with the main shaft 600.

[0059] When the operating mechanism drives the main shaft 600 to rotate, the rotating plate assembly 320 fixed on the main shaft 600 rotates accordingly, and sequentially drives the moving insulator 310, the moving contact fixing plate 330, and the moving contact plate 510 to swing, thereby causing the moving contact plate 510 to move closer to or away from the stationary contact plate 410. The hinge relationship between the rotating plate assembly 320 and the switch base frame 100 limits the rotating parts of the moving side structure, allowing the moving side insulation support assembly 300 to perform a pendulum-like motion around the corresponding rotating parts.

[0060] In this embodiment, the stationary side structure remains fixed while the moving side structure swings as a whole. Their distinct functions help reduce unexpected deviations of the moving contact assembly 500 during movement and ensure that the moving contact plate 510 maintains a relatively consistent approach and separation state during multiple opening and closing operations. Simultaneously, the stationary insulator 210 and the moving insulator 310 respectively provide insulation support for the stationary and moving side conductive components, maintaining necessary insulation between the contact assembly and the metal switch base 100, and providing corresponding mechanical support and electrical isolation conditions for the switch's opening and closing operations.

[0061] In some embodiments, the rotating plate assembly 320 is a bracket structure with a hinge ear 321 on one side, and an auxiliary spring assembly 900 is provided inside the switch base 100; the rotating plate assembly 320 is hinged to the auxiliary spring assembly 900 through the hinge ear 321.

[0062] The assist spring assembly 900 includes an assist spring body 910 and a hinged connecting seat 920 disposed at one end of the assist spring body 910. The hinged connecting seat 920 is hinged to the hinged ear seat 321. The other end of the assist spring body 910 is mounted on a support seat inside the switch base 100.

[0063] In the above embodiment, the rotating plate assembly 320 is a bracket structure with a hinge ear seat 321 on one side. The switch base 100 has an internal mounting space for accommodating the assist spring assembly 900 and a support seat for mounting the assist spring body 910. The assist spring assembly 900 includes the assist spring body 910 and a hinge connection seat 920, which is located at the end of the assist spring body 910 facing the rotating plate assembly 320. The hinge connection seat 920 can be placed between the two ear plates of the hinge ear seat 321, and a pin passes through the corresponding hinge holes, allowing the hinge connection seat 920 to rotate relative to the hinge ear seat 321. The other end of the assist spring body 910 is mounted on the support seat within the switch base 100. The support seat provides support for the base-side end of the assist spring assembly 900 and prevents unintended disengagement of that end.

[0064] In this embodiment, the assisting spring body 910 can adopt a spring structure capable of elastic expansion and contraction along its own length. Its base end can be mounted on a support base via an end connector; when it is necessary to accommodate changes in the angle of the assisting spring assembly 900, a pin connection can also be used between the end connector and the support base, allowing both ends of the assisting spring assembly 900 to rotate accordingly with the swing of the rotating plate assembly 320. When the rotating plate assembly 320 rotates around the main shaft 600, the position of the hinge ear 321 changes accordingly, and the hinge connecting seat 920 is displaced under the drive of the hinge ear 321. The assisting spring body 910 undergoes elastic deformation due to the change in the relative position of its two ends. The rotational engagement between the hinge connecting seat 920 and the hinge ear 321 allows the force direction of the assisting spring body 910 to be adjusted according to the position change of the rotating plate assembly 320, helping to reduce unnecessary lateral forces on the assisting spring body 910.

[0065] During installation, the relative positions of the support base and the hinge ear 321 can be determined according to the rotation range of the rotating plate assembly 320. This allows the auxiliary spring body 910 to generate appropriate elastic deformation during the closing process, and its elastic restoring force forms a component force acting on the rotating plate assembly 320 along the opening direction in the initial stage of opening. During the opening operation, the operating mechanism drives the main shaft 600 and the rotating plate assembly 320 to move in the opening direction. At the same time, the auxiliary spring body 910 releases part of its elastic potential energy, and its elastic restoring force is transmitted to the rotating plate assembly 320 through the hinge connecting seat 920 and the hinge ear 321, thereby providing an auxiliary function to the rotating plate assembly 320. This auxiliary function can be used to share some of the clamping resistance and transmission resistance that needs to be overcome when the moving contact assembly 500 disengages from the stationary contact assembly 400, which helps to improve the action response in the initial stage of opening. It should be noted that the auxiliary spring assembly 900 is only used as an auxiliary force-bearing component of the operating mechanism. Its elastic parameters, installation position and initial deformation can be selected according to the rotation angle of the turntable assembly 320 and the actual opening resistance.

[0066] In some embodiments, the stationary contact plate 410, the moving contact plate 510, and the contact fingers 4211 of the split contact finger assembly 420 are all made of T2 conductive copper material and are silver-plated on the surface, with a silver plating layer thickness of not less than 6μm.

[0067] In this embodiment, the stationary contact plate 410, the moving contact plate 510, and the contact finger 4211 in the split contact finger assembly 420 are all made of T2 conductive copper. T2 conductive copper, as the material used to manufacture these components, primarily serves to conduct the main circuit current. During processing, the stationary contact plate 410, the moving contact plate 510, and the contact finger 4211 can be fabricated according to their respective dimensions. Then, their surfaces are degreased, cleaned, and activated to reduce the impact of oil stains, oxides, etc., on the subsequent plating bonding state. The silver plating area at least covers the surfaces of the stationary contact plate 410, the moving contact plate 510, and the contact finger 4211 that participate in conductive contact in the closed state; depending on processing requirements, the entire outer surface of the above components can also be silver-plated.

[0068] Furthermore, the silver plating thickness on the surfaces of the stationary contact plate 410, the moving contact plate 510, and the contact finger 4211 is not less than 6 μm. Silver plating can be performed using conventional surface treatment methods such as electroplating. After plating, the thickness of the main contact area can be measured using a plating thickness gauge or other suitable testing equipment, and the plating surface can be visually inspected to ensure continuity of the plating in the contact area and reduce issues such as exposed copper, peeling, or localized missing plating. In addition, this embodiment limits the silver plating thickness to not less than 6 μm, allowing for sufficient plating thickness for subsequent assembly and reciprocating contact of the contacts. Compared to a thinner plating layer, this helps reduce the possibility of the copper substrate being exposed too quickly during processing, assembly, or initial use.

[0069] When the switch is in the closed state, a press-fit contact is formed between the moving contact plate 510 and the contact finger 4211, and the current enters the corresponding T2 conductive copper substrate through the silver-plated contact surface. The silver surface has good conductivity, and the contact interface is less prone to forming a high-resistivity oxide layer that is significantly detrimental to conductivity, thus reducing the impact of copper surface oxidation on the contact state. The stationary contact plate 410, moving contact plate 510, and contact finger 4211 use the same copper base material and silver plating treatment, ensuring a relatively consistent material configuration for the main contact parts in the main circuit. This helps reduce the risk of increased contact interface resistance and localized temperature rise, and allows the contact assembly to maintain a relatively stable conductive contact state during long-term use.

[0070] In existing outdoor disconnector switches, to ensure the conductivity of the main circuit, sufficient contact pressure is typically required between the moving and stationary contacts to maintain stable crimped contact when closed. However, the design of the contact system often faces the challenge of balancing contact reliability and operational flexibility. On the one hand, while a smaller contact clamping force reduces the resistance during opening, long-term operation can lead to fluctuations in the contact state due to factors such as assembly errors, mechanical vibration, temperature changes, and contact surface wear. This can result in a reduction in the actual contact area and an increase in contact resistance. On the other hand, increasing the clamping force to improve contact stability requires the moving contact to overcome greater mechanical resistance to disengage from the stationary contact during the initial opening phase. This not only increases the load on the operating mechanism but may also affect the response characteristics of the opening action.

[0071] Especially in switches employing elastic clamping contact structures, the contact clamping force is typically applied continuously by an elastic element. When the switch is closed, a larger clamping force helps maintain the crimped contact between the contacts; however, during the opening process, this clamping force translates into resistance that the moving contact must overcome when retracting from the stationary contact. Therefore, existing technologies often require a trade-off between contact stability and opening operation resistance, making it difficult to simultaneously achieve high contact reliability and good opening performance.

[0072] To address the above issues, this embodiment does not rely solely on increasing the contact pressure at a specific local location to maintain contact. Instead, it incorporates two sets of separate contact finger units 421 within the stationary contact assembly 400, with multiple contact fingers 4211 spaced apart along the axial direction of the connecting shaft 4212. Multiple spring assemblies 800 are distributed between the two sets of separate contact finger units 421, applying elastic clamping force to different contact finger areas. After the moving contact assembly 500 enters between the two sets of separate contact finger units 421, contact fingers 4211 at different locations contact the moving contact assembly 500. The conductive contact of the main circuit no longer primarily relies on a single location bearing a large pressure, thus helping to reduce dependence on large local contact pressure. The spring connecting shaft 820 overlaps within the arcuate groove of the contact finger 4211 and remains in contact under the preload tension of the spring body 810. When the contact finger 4211 undergoes a slight displacement due to the insertion or withdrawal of the moving contact assembly 500, the spring connecting shaft 820 can rotate or adjust its position relative to the arc-shaped groove, reducing the additional constraints on the movement of the contact finger caused by the rigid connection. Thus, the separate contact finger assembly 420 can maintain elastic clamping of the moving contact assembly 500 and make adaptive adjustments when the position of the contact finger changes slightly, helping to reduce issues such as insufficient local contact, concentrated elastic action, and movement jamming.

[0073] In terms of the opening operation, the auxiliary spring assembly 900 is disposed between the rotary plate assembly 320 and the switch base 100. One end of the auxiliary spring body 910 is connected to the hinge lug 321 of the rotary plate assembly 320 via the hinge connecting seat 920, and the other end is mounted on the support seat inside the switch base 100. When the rotary plate assembly 320 rotates with the main shaft 600 in the closing direction, the auxiliary spring body 910 generates corresponding elastic deformation; during the opening operation, the auxiliary spring body 910 releases part of its elastic potential energy and applies an auxiliary action along the opening direction to the rotary plate assembly 320 through the hinge connecting seat 920 and the hinge lug 321. This auxiliary action can share part of the clamping resistance that needs to be overcome when the moving contact assembly 500 retracts from the separate contact finger assembly 420, so that the operating mechanism does not have to bear the entire initial release load alone. This embodiment maintains the closing contact through a distributed elastic clamping structure, and the auxiliary spring assembly 900 provides assistance for the opening movement. This embodiment can improve the stress state of the moving contact assembly 500 in the initial stage of opening while maintaining the elastic pressing of the contacts, thereby taking into account the stability of the main circuit contact and the smoothness of the opening action to a certain extent.

[0074] The foregoing embodiments mainly describe the composition and structure of the switch body, the contact mating relationship, and the single-pendulum opening and closing process. In practical applications, the switch body is usually installed on the upper part of an outdoor steel column or corresponding support frame, while the operating mechanism can be set below the switch body according to the operating height, maintenance space, and site layout conditions. In order to transmit the mechanical action output by the operating mechanism to the main shaft 600 located at a higher position, this embodiment also provides an external transmission structure that cooperates with the switch body. The following is combined with... Figure 5 and Figure 6 The front and side views of the installation diagrams further illustrate the installation relationship between the switch body, the operating mechanism, and its transmission components.

[0075] like Figure 5 and Figure 6As shown, the single-pendulum outdoor disconnect load switch is installed on the upper part of the steel column, and the operating mechanism 20 is installed on the lower part of the steel column. A connecting flange crank 10 is provided at the end of the main shaft 600, and the connecting flange crank 10 is connected to the operating mechanism 20 via a connecting steel pipe 30 arranged along the height direction of the steel column. An intermediate support 40 is provided in the middle of the connecting steel pipe 30, which is fixed to the steel column and supports and restricts the position of the middle part of the connecting steel pipe 30. The connecting steel pipe 30 can be segmented according to the distance between the switch body and the operating mechanism 20, and adjacent pipe segments can be connected by connectors. When the extension length of the connecting steel pipe 30 is large, one or more intermediate supports 40 can also be provided along its length to reduce the large lateral swaying or bending of the connecting steel pipe 30 under its own weight and transmission action. Through the above installation method, the switch body can be arranged at a height that meets the requirements of line connection and electrical safety, while the operating mechanism 20 can be placed in a position that is convenient for personnel to operate, inspect, and maintain.

[0076] During opening or closing operations, the mechanical action output by the operating mechanism 20 is transmitted to the connecting flange crank 10 via the connecting steel pipe 30, and the connecting flange crank 10 drives the main shaft 600 to rotate. After the main shaft 600 rotates, it further drives the moving side insulation support assembly 300 and the moving contact assembly 500 to swing, causing the moving contact assembly 500 to switch between the closed conducting position and the open isolation position. The supporting effect of the intermediate support 40 on the connecting steel pipe 30 helps to reduce the significant deviation of the connecting steel pipe 30 during long-distance transmission, so that the output action of the operating mechanism 20 can be transmitted to the connecting flange crank 10 more stably. Thus, a continuous mechanical transmission relationship is formed between the external operating mechanism, the connecting steel pipe 30, the connecting flange crank 10 and the main shaft 600, so that the operating mechanism 20 does not need to be directly installed near the switch body, and can adapt to long-distance opening and closing operations under outdoor steel column installation conditions.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A single-pendulum type outdoor disconnect load switch, characterized in that, It includes a switch base frame (100), a stationary side insulation support assembly (200), a moving side insulation support assembly (300), a stationary contact assembly (400), a moving contact assembly (500), a main shaft (600), and an arc protection assembly (700). The stationary side insulation support assembly (200) is fixedly mounted on the switch base frame (100), and the stationary contact assembly (400) is mounted on the top of the stationary side insulation support assembly (200); the main shaft (600) is rotatably mounted on the switch base frame (100), and the moving side insulation support assembly (300) is fixedly connected to the main shaft (600). The moving contact assembly (500) is mounted on the top of the moving side insulation support assembly (300). The main shaft (600) is used for transmission connection with the operating mechanism and can drive the moving side insulation support assembly (300) to swing when rotating, so that the moving contact assembly (500) relative to the stationary contact assembly (400) performs a pendulum-like opening and closing motion between the closed conducting position and the open isolation position; the stationary contact assembly ( 400) includes a stationary contact plate (410) and a split contact finger assembly (420) disposed on the stationary contact plate (410) facing the side of the moving contact assembly (500) in the swing closing direction. The split contact finger assembly (420) is used to form an elastic pressing contact when the moving contact assembly (500) and the stationary contact assembly (400) are in the closed conducting position. The split contact finger assembly (420) includes two sets of split contact finger units (421) arranged at intervals and forming an elastic clamping structure through multiple sets of spring assemblies (800). The arc protection assembly (700) is disposed on the stationary contact assembly (400) and the moving contact assembly (500) and is used to guide the arc away from the contact area between the stationary contact assembly (400) and the moving contact assembly (500) during the opening and closing process.

2. The single-pendulum outdoor disconnect load switch according to claim 1, characterized in that, The arc-starting protection assembly (700) includes a stationary arc-starting rod (701) and a movable arc-starting rod (702). The stationary arc-starting rod (701) is disposed on the stationary contact assembly (400), and the movable arc-starting rod (702) is disposed on the movable contact assembly (500). The arc-starting protection assembly (700) is configured such that, during the opening process, the stationary arc-starting rod (701) and the moving arc-starting rod (702) can separate again after the stationary contact assembly (400) and the moving contact assembly (500) separate; and during the closing process, the stationary arc-starting rod (701) and the moving arc-starting rod (702) can make contact before the stationary contact assembly (400) and the moving contact assembly (500) make contact.

3. The single-pendulum outdoor disconnect load switch according to claim 2, characterized in that, The static arc-drawing rod (701) and the dynamic arc-drawing rod (702) are made of copper-chromium alloy, and the static arc-drawing rod (701) and the dynamic arc-drawing rod (702) are in line contact fit.

4. The single-pendulum outdoor disconnect load switch according to any one of claims 1-3, characterized in that, Each set of the split finger units (421) includes multiple independently arranged fingers (4211) and a connecting shaft (4212) that passes through the multiple fingers (4211). The connecting shaft (4212) passes through one end of the fingers (4211) near the stationary contact plate (410). The multiple fingers (4211) are arranged sequentially at intervals along the axial direction of the connecting shaft (4212). A gap is formed between two adjacent fingers (4211) that can be used to install a spring assembly (800). The spring assembly (800) is connected between two sets of the split finger units (421). The split finger assembly (420) also includes two end connecting plates (422), which are respectively disposed at both ends of the split finger unit (421), and each end connecting plate (422) is connected to the connecting shaft (4212) of the two split finger units (421) to form an integrated finger clamping structure.

5. The single-pendulum outdoor disconnect load switch according to claim 4, characterized in that, The number of fingers (4211) in each group of separate contact finger units (421) is even, and the number of spring assemblies (800) is half the number of fingers (4211) in each group of separate contact finger units (421). Multiple groups of spring assemblies (800) are evenly spaced, and multiple groups of spring assemblies (800) are connected to two groups of separate contact finger units (421) through the gaps between the fingers (4211), and can enable the two groups of separate contact finger units (421) to elastically clamp the moving contact assembly (500) towards each other in the closed state.

6. The single-pendulum outdoor disconnect load switch according to claim 5, characterized in that, The spring assembly (800) includes a spring body (810) and two spring connecting shafts (820) respectively disposed at the upper and lower ends of the spring body (810). The contact finger (4211) is provided with an arc-shaped groove adapted to the spring connecting shaft (820). The spring connecting shaft (820) overlaps in the arc-shaped groove of the corresponding contact finger (4211) on the same side. The middle section of the spring connecting shaft (820) is provided with an annular limiting groove for engaging with the spring body (810). Both ends of each spring connecting shaft (820) overlap in the arc-shaped groove of two adjacent contact fingers (4211) of the split contact finger unit (421) on the same side, so that the spring body (810) is in a pre-tightened elastic tension state to maintain the continuous contact engagement between the spring connecting shaft (820) and the arc-shaped groove.

7. The single-pendulum outdoor disconnect load switch according to claim 5 or 6, characterized in that, Each set of the split finger units (421) includes sixteen fingers (4211), and the spring assembly (800) is set in eight groups, with each pair of fingers (4211) corresponding to a group of spring assemblies (800).

8. The single-pendulum outdoor disconnect load switch according to claim 4, characterized in that, The stationary side insulation support assembly (200) includes a stationary insulator (210) and a stationary contact fixing plate (220). The stationary insulator (210) is fixedly mounted on the switch base frame (100), and the stationary contact fixing plate (220) is located at the top of the stationary insulator (210). The stationary contact plate (410) of the stationary contact assembly (400) is connected to the stationary contact fixing plate (220). The moving side insulation support assembly (300) includes a moving insulator (310), a rotating plate assembly (320), and a moving contact fixing plate (330). The rotating plate assembly (320) is fixedly connected to the main shaft (600). The moving insulator (310) is disposed on the rotating plate assembly (320). The moving contact fixing plate (330) is disposed at the top of the moving insulator (310). The moving contact plate (510) of the moving contact assembly (500) is connected to the moving contact fixing plate (330). The rotating plate assembly (320) is hinged to the switch base frame (100).

9. The single-pendulum outdoor disconnect load switch according to claim 8, characterized in that, The rotating plate assembly (320) is a bracket structure with a hinged lug (321) on one side, and an auxiliary spring assembly (900) is provided inside the switch base (100); the rotating plate assembly (320) is hinged to the auxiliary spring assembly (900) through the hinged lug (321); The assist spring assembly (900) includes an assist spring body (910) and a hinged connecting seat (920) disposed at one end of the assist spring body (910). The hinged connecting seat (920) is hinged to the hinged ear seat (321). The other end of the assist spring body (910) is mounted on a support seat inside the switch base (100).

10. The single-pendulum outdoor disconnect load switch according to claim 8 or 9, characterized in that, The static contact plate (410), the moving contact plate (510), and the contact fingers (4211) of the split contact finger assembly (420) are all made of T2 conductive copper material and are silver-plated on the surface with a silver plating layer thickness of not less than 6μm.

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