A pole-mounted load switch with grounding switch

Abstract

The application discloses a pole-mounted load switch with a grounding switch, which comprises a box body filled with environment-friendly gas, a load switch and a grounding switch which are arranged in the box body and are capable of being disconnected by linear motion, a load switch operating mechanism and a grounding switch operating mechanism which are respectively arranged in the box body and are capable of independently controlling the opening and closing of the corresponding switch, one end of the load switch is connected with an incoming line sleeve on the left side of the box body, the other end of the load switch is connected with an outgoing line sleeve on the right side of the box body, one end of the grounding switch is connected with a grounding row on the left side of the box body, and the other end of the grounding switch is connected with the outgoing line sleeve, the load switch operating mechanism is in driving cooperation with the load switch through a first transmission assembly, and the grounding switch operating mechanism is in driving cooperation with the grounding switch through a second transmission assembly. The grounding switch is arranged in the box body, so that the grounding switch is miniaturized, the installation and construction cost is reduced, the corrosion of components is avoided, the safety of electricity utilization is improved, the grounding switch satisfies the 5-time closing capacity of the national standard E2 level, and the opening and closing actions are stable and fast.

Description

Technical Field

[0001] This invention relates to the field of pole-mounted load switch technology, and more specifically, to a pole-mounted load switch with a grounding switch. Background Technology

[0002] The core function of pole-mounted load switches is to connect and disconnect load current under normal operating conditions. Box-type sealed load switches are widely used due to their small insulation distance. However, existing box-type sealed pole-mounted load switches only have the ability to interrupt load current. If an additional grounding switch is required, an external grounding switch must be installed outside the switch. This not only requires additional mounting brackets and copper busbar connections, increasing the manufacturing and on-site construction costs, but also exposes the external grounding switch to the air, making it susceptible to corrosion from the outdoor environment, resulting in a short service life and serious safety hazards in long-term operation. Furthermore, traditional pole-mounted load switches often use SF6 gas as the arc-extinguishing and insulating medium. SF6 gas has a greenhouse effect 23,400 times that of CO2, making it an environmentally polluting greenhouse gas that does not meet environmental protection requirements. In addition, the closing capacity of existing external grounding switches is insufficient, failing to meet the national standards for ground fault current closing in power systems, further reducing the safety and reliability of the power supply system. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects of the prior art and provide a pole-mounted load switch with a grounding switch, which solves the problems of inconvenient installation, high cost, easy corrosion, great safety hazards, non-environmentally friendly insulation medium, and insufficient grounding closing capacity caused by the requirement of an external grounding switch for existing pole-mounted load switches.

[0004] To achieve the aforementioned technical objectives, this invention discloses a pole-mounted load switch with a grounding switch, comprising a housing filled with environmentally friendly gas. The housing contains a load switch and a grounding switch that move linearly to achieve disconnection. It also includes load switch operating mechanisms and grounding switch operating mechanisms that independently control the opening and closing of their respective switches. One end of the load switch is connected to an inlet bushing on the left side of the housing, and the other end is connected to an outlet bushing on the right side of the housing. One end of the grounding switch is connected to a grounding busbar on the left side of the housing, and the other end is connected to the outlet bushing. The load switch operating mechanism engages with the load switch via a first transmission component, and the grounding switch operating mechanism engages with the grounding switch via a second transmission component.

[0005] Furthermore, the present invention provides a pole-mounted load switch with a grounding switch, wherein the load switch includes a first stationary contact and a first guide rod coaxially arranged, and a first movable contact slidably sleeved on the first guide rod. The first stationary contact is connected to the inlet bushing through a first insulating support, and the first guide rod is connected to the outlet bushing through a second insulating support. The first movable contact contacts the first guide rod through a first spring contact finger, and the end of the first movable contact facing the first stationary contact is provided with a first petal contact finger, which is engaged with a first transmission component.

[0006] Furthermore, the present invention provides a pole-mounted load switch with a grounding switch, wherein the first moving contact includes a first conductive sleeve and a moving air chamber, a fixed air chamber is sleeved on the right end of the first guide rod, the moving air chamber and the fixed air chamber are always inserted and fitted together to form a variable volume air chamber, the first conductive sleeve is provided with a vent hole communicating with the air chamber; a first protective cover is sleeved on the left end of the first conductive sleeve, and the first petal-shaped contact finger is disposed inside the first protective cover.

[0007] Furthermore, the present invention provides a pole-mounted load switch with a grounding switch, wherein the grounding switch includes a second stationary contact and a second guide rod coaxially arranged, a second moving contact slidably sleeved on the second guide rod, the second guide rod being connected to the grounding busbar through a third insulating support, the second stationary contact being fixed in the housing through a fourth insulating support, and the second stationary contact being provided with a conductive plate connected to the outgoing sleeve; the second moving contact is in contact with the second guide rod through a second spring contact finger, and the end of the second moving contact facing the second stationary contact is provided with a second petal contact finger, which is engaged with a second transmission component.

[0008] Furthermore, the present invention provides a pole-mounted load switch with a grounding switch, wherein the second moving contact includes a second conductive sleeve, and the second spring contact fingers are spaced apart in the middle of the inner sidewall of the second conductive sleeve; a second protective cover is fitted on the right end of the second conductive sleeve, and the second petal contact fingers are covered inside the second protective cover.

[0009] Furthermore, the present invention provides a pole-mounted load switch with a grounding switch, wherein the first transmission component includes a first rotating shaft arranged in a cross shape with a first guide rod, and a U-shaped first crank arm fixedly sleeved on the first rotating shaft. One end of the first rotating shaft is connected to the housing, and the other end is connected to the load switch operating mechanism. The inner sidewalls of the two U-shaped ports of the first crank arm are provided with opposing first toggle blocks. A first annular groove is formed on the first conductive sleeve of the load switch, and the first toggle blocks are located in the first annular groove to form a toggle engagement.

[0010] Furthermore, the present invention provides a pole-mounted load switch with a grounding switch, wherein the housing is provided with a first left limiting part and a first right limiting part located on both sides of a first rotating shaft, and a fan-shaped first limiting plate is fixed on the first rotating shaft, the first limiting plate being disposed between the first left limiting part and the first right limiting part.

[0011] Furthermore, the present invention provides a pole-mounted load switch with a grounding switch, wherein the load switch operating mechanism includes a first mounting plate fixed in the housing, a first operating spindle passing through the housing and through the first mounting plate, a first drive arm fixed on the first operating spindle, a first driven arm rotatably mounted on the first operating spindle, a first connecting plate, and a first spring; the first mounting plate is provided with a first left arc-shaped groove and a first right arc-shaped groove, the first guide post of the first drive arm is slidably engaged with the first left arc-shaped groove, the second guide post of the first driven arm is slidably engaged with the first right arc-shaped groove, the first spring is provided on the rear side of the ends of the first drive arm and the first driven arm, the upper end of the first connecting plate is hinged to the middle of the first driven arm, and the lower end is hinged to the first transmission arm on the first rotating shaft.

[0012] Furthermore, the present invention provides a pole-mounted load switch with a grounding switch, wherein the second transmission assembly has the same structure as the first transmission assembly, and the grounding switch operating mechanism has the same structure as the load switch operating mechanism.

[0013] Furthermore, the present invention provides a pole-mounted load switch with a grounding switch, wherein the environmentally friendly gas is a mixture of nitrogen and carbon dioxide in a 2:1 ratio.

[0014] The beneficial effects of this invention are as follows: This invention integrates the grounding switch and load switch into a housing filled with environmentally friendly gas, eliminating the need for an external grounding switch mounting bracket and copper busbar connection structure, significantly reducing manufacturing and construction costs; the switch components are sealed within the housing, avoiding the corrosive effects of outdoor air, eliminating operational hazards caused by corrosion, and improving electrical safety and reliability; the use of a mixture of nitrogen and carbon dioxide as the insulation and arc-extinguishing medium meets environmental protection requirements, and its high insulation properties reduce the phase-to-phase and phase-to-ground distances compared to external air-insulated products, achieving miniaturization of the switch; the grounding switch meets the national standard E2 level 5-times ground fault current making capability; both the load switch and grounding switch adopt a direct-acting structure and a dedicated operating mechanism, resulting in fast opening and closing speeds and stable operation, meeting the rated current breaking and fault current closing requirements of the power supply system. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of a pole-mounted load switch with a grounding switch according to the present invention; Figure 2 This is a left-side structural schematic diagram (with partial cross-section) of a pole-mounted load switch with a grounding switch according to the present invention. Figure 3 This is a schematic diagram of the structure of a pole-mounted load switch with a grounding switch according to the present invention when the load switch is closed and the grounding switch is open; Figure 4 This is a schematic diagram of the structure of a pole-mounted load switch with a grounding switch according to the present invention when the load switch is open and the grounding switch is closed; Figure 5 This is a schematic diagram of the load switch in this invention; Figure 6 This is a schematic diagram of the load switch operating mechanism in this invention; Figure 7 This is a schematic diagram of the load switch operating mechanism in the closed state in this invention; Figure 8 This is a schematic diagram of the load switch operating mechanism in the open state in this invention; Figure 9 This is a schematic diagram of the structure of the first transmission component in this invention; Figure 10 This is a schematic diagram of the grounding switch operating mechanism in the open state in this invention; Figure 11 This is a schematic diagram of the grounding switch operating mechanism in the closed state according to the present invention; Figure 12 This is a schematic diagram of the structure of the second transmission component in this invention. Detailed Implementation

[0016] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0017] See Figure 1-3This invention discloses a pole-mounted load switch with a grounding switch, comprising a housing 1 filled with an environmentally friendly gas, which is a mixture of nitrogen and carbon dioxide in a 2:1 ratio, possessing both high insulation and environmental friendliness. The housing 1 contains a load switch 2 and a grounding switch 3, both moving linearly to achieve disconnection. The grounding switch 3 is located above the load switch 2, and the two have similar structures. They are also equipped with load switch operating mechanisms 4 and grounding switch operating mechanisms 5, which independently control the opening and closing of their respective switches, enabling individual operation control of the load switch 2 and grounding switch 3 (i.e., load switch operating mechanism 4 controls the opening and closing of load switch 2, and grounding switch operating mechanism 5 controls the on / off state of grounding switch 3). One end of the load switch 2 is connected to an inlet bushing 12 located on the left side wall of the housing 1, and the other end is connected to the right side wall of the housing 1. The outlet bushing 13 is connected to the power supply side to control the circuit switching between the power supply side and the load side. One end of the grounding switch 3 is connected to the grounding busbar 11 on the left side wall of the enclosure 1, and the other end is connected to the outlet bushing 13 to achieve grounding protection on the load side. The load switch operating mechanism 4 forms a toggle with the load switch 2 through the first transmission component set on the lower side of the load switch 2. The grounding switch operating mechanism 5 forms a toggle with the grounding switch 3 through the second transmission component set on the upper side of the grounding switch 3. The action of the operating mechanism can be transmitted to the corresponding switch through the transmission component to realize the opening and closing of the switch. In this embodiment, the grounding switch 3 and the load switch 2 are integrated into the same sealed enclosure 1, eliminating the need for the mounting bracket and copper busbar connection structure required for the external grounding switch 3, reducing manufacturing and construction costs. At the same time, the sealed structure avoids corrosion of components by the outdoor environment, improving the safety and reliability of operation. The environmentally friendly mixed gas replaces the traditional SF6 gas, solving the greenhouse gas pollution problem, and the high insulation enables the miniaturization of the switch.

[0018] See Figure 3In one embodiment of the present invention, the load switch 2 includes a first stationary contact 21 and a first guide rod 22 coaxially arranged, and a first moving contact slidably sleeved on the first guide rod 22. The first stationary contact 21 is fixedly connected to the inlet sleeve 12 via a first insulating support 23, and the first guide rod 22 is fixedly connected to the outlet sleeve 13 via a second insulating support 24, ensuring the insulation and stability of the connection. The first moving contact is kept in contact with the first guide rod 22 via a first spring contact finger 25 to ensure conductivity. A first petal contact finger 26 is provided at the end of the first moving contact facing the first stationary contact 21 to improve the tightness of the contact. The first moving contact forms a prying engagement with a first transmission component, and the action of the first transmission component drives the first moving contact to slide linearly along the first guide rod 22, realizing the opening and closing of the load switch 2. This structure adopts a direct-acting contact design, combined with spring contact fingers and petal contact fingers, to ensure the conductivity stability and contact reliability of the load switch 2 during the switching process. Compared with the traditional contact structure, the operation is smoother and the contact effect is better.

[0019] See Figure 3 and Figure 5 In one embodiment of the present invention, the first moving contact specifically includes a first conductive sleeve 27 and a moving air chamber 28. A fixed air chamber 29 is sleeved on the right end of the first guide rod 22, ensuring that the moving air chamber 28 and the fixed air chamber 29 are always in a plug-in engagement state (i.e., they never separate during use), forming a variable-volume air chamber 271 between them. When the load switch 2 is in the closed state, the volume of the air chamber 271 is at its maximum; when the load switch 2 is in the open state, the volume of the air chamber 271 is at its minimum. The first conductive sleeve 27 has six vent holes 272 extending through it along its own axis. These vent holes 272 are connected to the air chamber 271. These six vent holes 272 are evenly distributed radially along the first conductive sleeve 27. When the load switch 2 is open, the first moving contact slides, causing the space in the air chamber 271 to be instantly compressed. The resulting high-speed airflow flows out through the vent holes 272, serving to cool and extinguish arcs, thus achieving reliable interruption of the load current. A first protective cover 20 is fitted onto the left end of the first conductive sleeve 27, covering the first petal contact finger 26 within the first protective cover 20. The first protective cover 20 protects the first petal contact finger 26 from damage caused by gas impact or collision with internal components of the housing 1, thus extending the service life of the components. This gas chamber 271 structure is a dedicated design for the load switch 2 (the grounding switch 3 does not have this gas chamber 271 structure). It utilizes gas compression to achieve arc extinguishing and cooling, eliminating the need for additional arc extinguishing components and simplifying the structure.

[0020] See Figure 3In one embodiment of the present invention, the grounding switch 3 includes a second stationary contact 32 and a second guide rod 31 coaxially arranged, and a second moving contact slidably sleeved on the second guide rod 31. The second guide rod 31 is fixedly connected to the grounding busbar 11 via a third insulating support 33, and the second stationary contact 32 is fixed inside the housing 1 via a fourth insulating support 35. A conductive plate 35 connected to the outlet bushing 13 is provided on the second stationary contact 32, enabling the grounding switch 3 to connect to the outlet bushing 13 on the load side. The second moving contact maintains contact with the second guide rod 31 via a second spring contact finger 36 to ensure the stability of grounding conductivity. A second petal contact finger 37 is provided at the end of the second moving contact facing the second stationary contact 32 to improve the tightness of the grounding contact. The second moving contact forms a toggle engagement with a second transmission component, and the movement of the second transmission component drives the second moving contact to slide linearly along the second guide rod 31, realizing the opening and closing of the grounding switch 3. The grounding switch 3 adopts a direct-acting contact structure similar to that of the load switch 2, which ensures the consistency and stability of the operation. It also eliminates the need for the gas chamber 271 structure. Since no current flows through the grounding switch 3 during the opening process, there is no need for arc extinguishing and cooling, which simplifies the structure of the grounding switch 3.

[0021] See Figure 3 In one embodiment of the present invention, the second moving contact specifically includes a second conductive sleeve 38, with second spring contact fingers 36 spaced apart in the middle of the inner sidewall of the second conductive sleeve 38 to ensure effective contact conductivity between the second moving contact and the second guide rod 31. A second protective cover 39 is fitted onto the right end of the second conductive sleeve 38, covering the second petal contact fingers 37 within the second protective cover 39. The second protective cover 39 protects the second petal contact fingers 37, preventing damage and dust accumulation, and extending the service life of the grounding switch 3 contacts. This structure is consistent with the protective design of the load switch contacts, improving the versatility of the product structure.

[0022] See Figure 3 , Figure 4 and Figure 9In one embodiment of the present invention, the first transmission component includes a first rotating shaft 61 arranged in a cross shape in space with the first guide rod 22, and a U-shaped first crank arm 62 fixedly sleeved on the first rotating shaft 61. One end of the first rotating shaft 61 is connected to the housing 1 to ensure rotational stability, and the other end of the first rotating shaft 61 is connected to the load switch operating mechanism 4 to receive the operating power of the load switch operating mechanism 4. On the inner sidewalls of the two U-shaped ends of the first crank arm 62, there are opposing first toggle blocks 621. A first annular groove 273 is formed on the first conductive sleeve 27 of the load switch 2. Specifically, there is a gap between the first protective cover 20 and the gas cylinder 28 on the first conductive sleeve 27, and an annular groove (i.e., the first annular groove 273) is formed between their end faces. The first toggle block 621 is located in the first annular groove 273 to form a toggle engagement. When the first rotating shaft 61 rotates, it drives the first crank arm 62 to rotate. The first toggle block 621 moves the first conductive sleeve 27 in the first annular groove 273, thereby driving the first moving contact to slide linearly along the first guide rod 22. The transmission assembly uses a cross-shaped main shaft and a U-shaped crank arm to convert the rotational motion of the main shaft into the linear motion of the moving contact. It has high transmission efficiency and precise action. Compared with the traditional linkage transmission structure, the structure is more compact and suitable for the internal layout of the sealed housing 1.

[0023] See Figure 4 and Figure 7 In one embodiment of the present invention, the housing 1 is provided with a first left limiting part 64 and a first right limiting part 65 located on both sides of the first rotating shaft 61. The first left limiting part 64 and the first right limiting part 65 are limiting bolts. A first limiting plate 63 with a fan-shaped end is fixed on the first rotating shaft 61. The first limiting plate 63 is located between the first left limiting part 64 and the first right limiting part 65. Through the cooperation of the first limiting plate 63 with the first left limiting part 64 and the first right limiting part 65, the rotation angle of the first rotating shaft 61 is limited, thereby limiting the sliding stroke of the moving contact of the load switch 2 and avoiding damage to the components due to excessive movement.

[0024] See Figure 4 and Figure 12 The structure of the second transmission component is completely identical to that of the first transmission component, including a second rotating shaft 71, a second crank arm 72, and a second lever 721. It is also equipped with a second left limiting part 74, a second right limiting part 75, and a second limiting plate 73, achieving precise limiting of the sliding stroke of the moving contact of the grounding switch. The limiting structure fills the gap in the existing load switch 2's lack of precise stroke limiting, avoiding problems such as contact collisions and component deformation caused by overtravel, improving the safety and stability of the switch operation. Furthermore, the versatility of the transmission component structure improves the product's assembly efficiency.

[0025] See Figure 6-9In one embodiment of the present invention, the load switch operating mechanism 4 includes a first mounting plate 41 fixed inside the housing 1, a first operating spindle 42 passing through the housing 1 and through the first mounting plate 41, a first drive arm 43 fixed on the first operating spindle 42 on the rear side of the first mounting plate 41, a first driven arm 44 rotatably mounted on the first operating spindle 42 on the rear side of the first mounting plate 41, a first connecting plate 45 and a first spring 46. A first left arc-shaped groove 411 and a first right arc-shaped groove 421 are respectively provided on the left and right sides of the first mounting plate 41. A first guide post 431 protruding forward is provided at the end of the first drive arm 43, allowing the first guide post 431 to slide in cooperation with the first left arc-shaped groove 411. A second guide post 441 protruding forward is provided at the end of the first driven arm 44, allowing the second guide post 441 to slide in cooperation with the first right arc-shaped groove 421. A first spring 46 is installed on the rear side of the ends of the first drive arm 43 and the first driven arm 44. The upper end of the first connecting plate 45 is hinged to the middle of the first driven arm 44, and the lower end of the first connecting plate 45 is hinged to the first transmission arm 66 fixed on the first rotating shaft 61. The load switch operating mechanism 4 is driven by the energy storage and release of the first spring 46. The first operating handle 47 is installed on the first operating main shaft 42 on the outside of the housing 1. When the first operating handle 47 is rotated, the first driving arm 43 stretches the first spring 46 to store energy. When the first driving arm 43 and the first driven arm 44 are collinear, the first spring 46 stores energy to its maximum. After the first operating handle 47 is rotated again, the first spring 46 releases energy, driving the first driven arm 44 to rotate. The action is then transmitted to the first rotating shaft 61 through the first connecting plate 45 to realize the opening and closing of the switch. Compared with the traditional operating mechanism, the action speed is faster, the opening and closing speed can reach 2m / s, and the action is more stable.

[0026] See Figure 10-12 In one embodiment of the present invention, the structure of the grounding switch operating mechanism 5 is completely consistent with the structure of the load switch operating mechanism 4, including a second mounting plate, a second operating spindle 52, a second drive arm 53, a second driven arm 54, a second connecting plate 55, and a second spring 56. The second mounting plate is provided with a second left arc-shaped groove and a second right arc-shaped groove. The third guide post 531 of the second drive arm 53 is slidably engaged with the second left arc-shaped groove, and the fourth guide post 541 of the second driven arm 54 is slidably engaged with the second right arc-shaped groove. The second spring 56 is located on the rear side of the ends of the second drive arm 53 and the second driven arm 54, and is hinged to the second transmission arm 76 on the second rotating shaft 71 through the second connecting plate 55. A second operating handle 57 is installed on the second operating spindle 52 on the outside of the housing 1. The structural versatility of the grounding switch operating mechanism 5 improves the component commonality rate of the product, reduces production and maintenance costs, and also adopts the same spring energy storage and release action mode, ensuring the opening and closing speed and action stability of the grounding switch 3, so that the grounding switch 3 has a reliable short-circuit current closing capability.

[0027] In this invention, the grounding switch 3 has a 5-times ground fault current closing capability, meeting the E2 level closing capability required by national standards. Both the load switch 2 and the grounding switch 3 have opening and closing speeds of up to 2 m / s, and both employ a direct-acting contact structure, enabling reliable interruption of rated current and closing of fault current. The grounding switch 3's closing capability meets the national standard E2 level, filling the gap in insufficient closing capability of existing external grounding switches 3. The combination of the direct-acting structure and high opening and closing speed allows the switch to meet the power supply system's requirements for fault current closing, improving the safety and reliability of the power supply system.

[0028] The overall operating principle of this invention is as follows: when load switch 2 is in the closed state and grounding switch 3 is in the open state (e.g.) Figure 3 As shown), when a power outage maintenance operation is required, firstly, rotate the first operating handle 47 counterclockwise to drive the first operating spindle 42 to rotate. The first drive arm 43 rotates around the first operating spindle 42 as the pivot. The first guide post 431 slides counterclockwise along the first left arc groove 411. The first drive arm 43 stretches the first spring 46 to store energy. When the first drive arm 43 and the first driven arm 44 are collinear, the first spring 46 is stretched to its longest length and maximum tension. Continue rotating the first operating handle 47, and the first drive arm 43 and the first driven arm 44 form an angle and are limited within the first left arc groove 411. The first driven arm 44 rotates clockwise under the tension of the first spring 46, driving the first rotating shaft 61 to rotate through the first connecting plate 45. The first lever 621 of the first crank arm 62 moves the first moving contact to slide along the first guide rod 22, causing the moving and stationary contacts of the load switch 2 to separate. The first limiting plate 63 on the first rotating shaft 61 abuts against the first right limiting part 65, realizing the load switch opening. Close the second tripping switch; then operate the second operating handle 57 clockwise, driving the second operating spindle 52 to rotate. The second drive arm 53 rotates around the second operating spindle 52 as the pivot. The third guide post 531 slides clockwise along the second left arc-shaped groove. The second drive arm 53 stretches the second spring 56 to store energy. When the second drive arm 53 and the second driven arm 54 are collinear, the second spring 56 is stretched to its longest length and maximum tension. Continue to rotate the second operating handle 57. The second drive arm 53 and the second driven arm 54 form an angle and are limited within the second left arc-shaped groove. The second driven arm 54 rotates counterclockwise under the tension of the second spring 56. Through the second connecting plate 55, it drives the second rotating shaft 71 to rotate. The second lever 721 of the second crank arm 72 moves the second moving contact to slide along the second guide rod 31, so that the moving and stationary contacts of the grounding switch 3 contact. The second limiting plate 73 on the second rotating shaft 71 abuts against the second right limiting part 75, realizing the closing of the grounding switch 3. At this time, the load side is grounded, presenting... Figure 4As shown, workers can perform safe maintenance on the load side. When power needs to be restored, first, operate the second operating handle 57 counterclockwise. Through the cooperation of the grounding switch operating mechanism 5 and the second transmission component, the second moving contact separates from the second stationary contact 32, realizing the opening of the grounding switch 3. Then, rotate the first operating handle 47 clockwise. Through the cooperation of the load switch operating mechanism 4 and the first transmission component, the first moving contact contacts the first stationary contact 21, realizing the closing of the load switch 2, reconnecting the power supply side and the load side of the switchgear, and restoring normal power supply. Throughout the operation, the actions of the load switch 2 and the grounding switch 3 are independent of each other. The operating mechanism achieves rapid opening and closing through spring energy storage and release. The transmission component accurately transmits the action, the limit structure ensures the travel distance, the structure built into the sealed housing avoids environmental corrosion, the environmentally friendly mixed gas achieves insulation and arc extinguishing, and the E2-level closing capability of the grounding switch ensures the reliability of grounding protection. The overall structure is compact, simple to operate, safe and reliable, solving many technical defects of existing pole-mounted load switches.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A pole-mounted load switch with a grounding switch, characterized in that: The device includes a housing filled with environmentally friendly gas. Inside the housing are a load switch and a grounding switch that move in a straight line to disconnect or disconnect. It also includes separate operating mechanisms for the load switch and grounding switch, each independently controlling the opening and closing of its respective switch. One end of the load switch is connected to the inlet bushing on the left side of the housing, and the other end is connected to the outlet bushing on the right side of the housing. One end of the grounding switch is connected to the grounding busbar on the left side of the housing, and the other end is connected to the outlet bushing. The load switch operating mechanism engages with the load switch via a first transmission component, and the grounding switch operating mechanism engages with the grounding switch via a second transmission component.

2. A pole-mounted load switch with a grounding switch according to claim 1, characterized in that: The load switch includes a first stationary contact and a first guide rod arranged coaxially, and a first movable contact slidably sleeved on the first guide rod. The first stationary contact is connected to the inlet bushing through a first insulating support, and the first guide rod is connected to the outlet bushing through a second insulating support. The first movable contact contacts the first guide rod through a first spring contact finger. The end of the first movable contact facing the first stationary contact is provided with a first petal contact finger, which is engaged with the first transmission component.

3. A pole-mounted load switch with a grounding switch according to claim 2, characterized in that: The first moving contact includes a first conductive sleeve and a moving air chamber. A fixed air chamber is sleeved on the right end of the first guide rod. The moving air chamber and the fixed air chamber are always inserted and connected to form a variable volume air chamber. The first conductive sleeve is provided with a vent hole communicating with the air chamber. A first protective cover is sleeved on the left end of the first conductive sleeve. The first petal-shaped contact finger cover is located inside the first protective cover.

4. A pole-mounted load switch with a grounding switch according to claim 3, characterized in that: The grounding switch includes a second stationary contact and a second guide rod arranged coaxially, a second moving contact slidably sleeved on the second guide rod, the second guide rod being connected to the grounding busbar through a third insulating support, the second stationary contact being fixed in the housing through a fourth insulating support, and a conductive plate connected to the outgoing sleeve being provided on the second stationary contact; the second moving contact is in contact with the second guide rod through a second spring contact finger, and a second petal contact finger is provided at one end of the second moving contact facing the second stationary contact, and is engaged with the second transmission component.

5. A pole-mounted load switch with a grounding switch according to claim 3, characterized in that: The second moving contact includes a second conductive sleeve, and the second spring contact finger is spaced apart in the middle of the inner side wall of the second conductive sleeve; a second protective cover is fitted on the right end of the second conductive sleeve, and the second petal contact finger is covered inside the second protective cover.

6. A pole-mounted load switch with a grounding switch according to claim 5, characterized in that: The first transmission assembly includes a first rotating shaft arranged in a cross shape with the first guide rod, and a U-shaped first crank arm fixedly sleeved on the first rotating shaft. One end of the first rotating shaft is connected to the housing, and the other end is connected to the load switch operating mechanism. The inner sidewalls of the two U-shaped ports of the first crank arm are provided with opposing first toggle blocks. A first annular groove is formed on the first conductive sleeve of the load switch, and the first toggle blocks are located in the first annular groove to form a toggle engagement.

7. A pole-mounted load switch with a grounding switch according to claim 6, characterized in that: The housing is provided with a first left limiting part and a first right limiting part located on both sides of the first rotating shaft. A fan-shaped first limiting plate is fixed on the first rotating shaft, and the first limiting plate is located between the first left limiting part and the first right limiting part.

8. A pole-mounted load switch with a grounding switch according to claim 6, characterized in that: The load switch operating mechanism includes a first mounting plate fixed inside the housing, a first operating spindle passing through the housing and the first mounting plate, a first drive arm fixed on the first operating spindle, a first driven arm rotatably mounted on the first operating spindle, a first connecting plate, and a first spring. The first mounting plate is provided with a first left arc-shaped groove and a first right arc-shaped groove. The first guide post of the first drive arm is slidably engaged with the first left arc-shaped groove, and the second guide post of the first driven arm is slidably engaged with the first right arc-shaped groove. The first spring is located on the rear side of the ends of the first drive arm and the first driven arm. The upper end of the first connecting plate is hinged to the middle of the first driven arm, and the lower end is hinged to the first transmission arm on the first rotating shaft.

9. A pole-mounted load switch with a grounding switch according to claim 8, characterized in that: The second transmission component has the same structure as the first transmission component, and the grounding switch operating mechanism has the same structure as the load switch operating mechanism.

10. A pole-mounted load switch with a grounding switch according to claim 9, characterized in that: The environmentally friendly gas is a mixture of nitrogen and carbon dioxide in a 2:1 ratio.

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