Switch cabinet

Abstract

The invention relates to the technical field of switching devices for power supply or power distribution, in particular to a switch cabinet. The switch cabinet comprises a cabinet body, a switch and an operating mechanism are installed on the cabinet body, the operating mechanism is provided with an output shaft, the switch is provided with an input shaft, and the output shaft of the operating mechanism is in transmission connection with the input shaft of the switch through a conversion gear set. And each gear of the conversion gear set has a transmission ratio meeting the requirement that the output shaft of the operating mechanism drives the input shaft of the switch to perform switch opening and closing actions. The switching gear set is used for turning and changing the rotating speed, so that the rotating power output by the output shaft of the operating mechanism is converted into the rotating power required by the input shaft of the switch, the operating mechanism of the same specification can be used for switches with different rotating strokes of the input shaft, and the universality of the operating mechanism is improved; operating mechanisms of switch cabinets with different voltage and current levels can be universal, and the production cost of the switch cabinet can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of switch devices for power supply or power distribution, and in particular to a switch cabinet. Background Art

[0002] The ring main unit is a switch cabinet used for power supply and distribution systems. The basic structure of the ring main unit can be found in a 35kV fully insulated and fully sealed gas ring main unit disclosed in the Chinese utility model patent with authorization announcement number CN207250977U. A stainless steel gas box is arranged in the cabinet of the ring main unit. The stainless steel gas box is a fully sealed structure and is filled with sulfur hexafluoride gas. A circuit breaker and a disconnector are arranged inside the stainless steel gas box. The circuit breaker shaft is connected to the circuit breaker operating mechanism through a dynamic sealing flange, and the disconnector shaft is connected to the disconnector operating mechanism through a dynamic sealing flange. A sulfur hexafluoride gas pressure density meter connected to the stainless steel gas box is provided on the cabinet, and an operation panel is provided on the front of the cabinet, which can display the opening and closing status of the circuit breaker and the disconnector.

[0003] At present, the ring main unit usually adopts a three-position isolating switch, also called a three-position switch, which has three positions: closing, opening, and grounding. The three-position switch is used in the ring main unit to realize the connection, isolation, and grounding of the high-voltage incoming busbar. The operating mechanism of the three-position switch can refer to a three-position mechanism disclosed in the Chinese invention patent application with application publication number CN117612882A. The mechanism is a double-axis operating mechanism, and a closing operating shaft and a grounding operating shaft are installed on its frame. The closing position and the opening position of the three-position switch can be switched by rotating the closing operating shaft with an operating handle, and the grounding position and the opening position of the three-position switch can be switched by rotating the grounding operating shaft with an operating handle. Among them, an output shaft is rotatably installed on the frame of the operating mechanism, and the output shaft is connected to the closing operating shaft and the grounding operating shaft through gear transmission. When the closing operating shaft and the grounding operating shaft rotate, they can drive the output shaft to rotate, and power is output to the three-position switch through the output shaft. The switch has a transmission main shaft for transmission connection with the output shaft of the operating mechanism. The transmission main shaft of the switch is driven to rotate by the rotation of the output shaft of the operating mechanism. When the transmission main shaft rotates, the moving contact of the switch can be driven to move linearly through the gear rack mechanism, thereby realizing the opening and closing actions of the switch.

[0004] For the inflatable switch cabinet, the switch is arranged in the gas box, and the operating mechanism is arranged outside the gas box. In order to maintain the seal, the transmission main shaft of the switch is connected with a dynamic seal assembly, which includes a flange and a rotating shaft. The flange constitutes the fixed part of the dynamic seal assembly and is fixed on the side wall of the gas box. The rotating shaft constitutes the rotating part of the dynamic seal assembly and is installed in the center hole of the flange for sealing and rotation. The inner end of the rotating shaft is located in the gas box and is fixedly connected to the transmission main shaft. The outer end of the rotating shaft is located outside the gas box and is fixedly connected to the output shaft of the operating mechanism. The rotating shaft constitutes the input shaft of the switch for the power input of the operating mechanism. For the non-inflatable switch cabinet, since no seal is required, the connection structure between the switch and the operating mechanism is simpler. The transmission main shaft of the switch is directly and coaxially connected to the output shaft of the operating mechanism. In this case, the transmission main shaft of the switch is the input shaft of the switch.

[0005] For conventional switch cabinet design, due to the matching of switches and operating mechanisms, each specification of switch is equipped with a matching operating mechanism. The rotation direction and rotation angle of the output shaft of the operating mechanism are consistent with the rotation direction and rotation angle of the input shaft of the switch to meet the needs of the operating mechanism to drive the corresponding switch to open and close. For the same series of ring network cabinets, with the increase of voltage and current levels, the insulation requirements are getting higher and higher, and the internal structure and size of the switch cabinet will change accordingly. Affected by the installation posture and size changes of the switch, the rotation direction or rotation angle of the input shaft that drives the switch to open and close will change. The input shaft rotation stroke of the switch of the switch cabinet with different voltage and current levels is different. In order to adapt to the switches of the switch cabinet with higher voltage and current levels, it is necessary to re-match, design and develop new operating mechanisms, which will make the production cost higher. Summary of the invention

[0006] The object of the present invention is to provide a switch cabinet to solve the problem that the transmission connection structure between the switch and the operating mechanism of the current switch cabinet needs to be re-matched, designed and developed with a new operating mechanism when facing the switches of the switch cabinet with higher voltage and current levels, resulting in higher production costs.

[0007] The technical solution of the switch cabinet of the present invention is: A switch cabinet comprises a cabinet body, on which a switch and an operating mechanism are installed, the operating mechanism has an output shaft, the switch has an input shaft, the output shaft of the operating mechanism is transmission-connected to the input shaft of the switch through a conversion gear set, and each gear of the conversion gear set has a transmission ratio that satisfies the output shaft of the operating mechanism driving the input shaft of the switch to perform switch opening and closing actions.

[0008] Beneficial effects: The present invention improves the switch cabinet in the prior art, so that the output shaft of the operating mechanism is connected to the input shaft of the switch through a conversion gear set, and the transmission ratio of each gear of the conversion gear set is used to convert the transmission between the output shaft of the operating mechanism and the input shaft of the switch. When the rotation direction and rotation angle of the output shaft of the operating mechanism are different from the rotation direction and rotation angle required by the input shaft of the switch, the conversion gear set can be used to change the direction and speed, so that the rotational power output by the output shaft of the operating mechanism is converted into the rotational power required by the input shaft of the switch. In this way, the same specification of operating mechanism can be used for switches with different input shaft rotation strokes, thereby improving the versatility of the operating mechanism. The operating mechanisms of switch cabinets with different voltage and current levels can be universal, which is beneficial to reducing the production cost of the switch cabinet.

[0009] Furthermore, the cabinet includes a mechanism mounting plate, the operating mechanism is mounted on the outer side of the mechanism mounting plate, the switch body is located on the inner side of the mechanism mounting plate, a gear mounting bracket is fixed to the outer side of the mechanism mounting plate, and at least one gear of the conversion gear set is rotatably mounted on the gear mounting bracket.

[0010] Furthermore, the gear of the conversion gear set used for preventing rotation and connecting the output shaft is rotatably mounted on the gear mounting bracket.

[0011] Furthermore, a positioning hole for the input shaft to fit through is provided on the gear mounting bracket, and the conversion gear set includes a gear for being non-rotatably connected to the input shaft.

[0012] Furthermore, the switch cabinet is an inflatable switch cabinet, the cabinet body includes an air box, the switch body is arranged in the air box, the switch includes a moving contact and a transmission main shaft for driving the moving contact to perform opening and closing actions, the transmission main shaft is connected to a dynamic sealing assembly, the dynamic sealing assembly includes a flange and a rotating shaft rotatably arranged in the center hole of the flange, the flange is fixed to the side wall of the air box, the inner end of the rotating shaft is connected to the transmission main shaft for rotation, and the outer end of the rotating shaft is connected to the corresponding gear of the conversion gear set for rotation, and the rotating shaft constitutes the input shaft.

[0013] Furthermore, a stop-rotation connection hole is provided at the inner end of the rotating shaft, and the stop-rotation connection hole is a blind hole. The transmission main shaft has a stop-rotation connection end adapted to extend into the stop-rotation connection hole to form a stop-rotation fit.

[0014] Furthermore, the switch cabinet is a non-inflatable switch cabinet, the switch includes a moving contact and a transmission main shaft for driving the moving contact to perform opening and closing actions, the transmission main shaft is non-rotatably connected to the corresponding gears of the conversion gear set, and the transmission main shaft constitutes the input shaft.

[0015] Furthermore, the conversion gear set has two gears, and the two gears are respectively connected to the output shaft and the input shaft in a non-rotatable manner.

[0016] Further, when the output shaft drives the input shaft to rotate through the conversion gear set, the rotation speeds of the two gears are different.

[0017] Furthermore, the conversion gear set has three gears, which are meshed in sequence, wherein the gear of the conversion gear set that is non-rotatably connected to the output shaft is a mechanism conversion gear, and the gear of the conversion gear set that is non-rotatably connected to the input shaft is a switch conversion gear, and when the output shaft drives the input shaft to rotate through the conversion gear set, the rotational speed of the mechanism conversion gear is different from the rotational speed of the switch conversion gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial schematic diagram of the operating mechanism of the switch cabinet of the embodiment of the present invention; Figure 2 for Figure 1 Side view of the switch cabinet part; Figure 3 for Figure 1 Schematic diagram without the operating mechanism of the three-position switch; Figure 4 for Figure 1 Schematic diagram of the three-position switch operating mechanism; Figure 5 for Figure 2 A three-dimensional schematic diagram of the installation structure of the conversion gear set; Figure 6 for Figure 2 A schematic diagram of a rear side view of a conversion gear set; Figure 7 for Figure 5 A schematic diagram of a rear side view of a gear mounting bracket; Figure 8 for Figure 5 A schematic diagram of a front side view of a gear mounting bracket; Fig. 9 for Figure 5 A schematic diagram of the structure of the switch conversion gear; Fig.10 for Figure 5 Schematic diagram of the structure of the mechanism conversion gear.

[0019] In the figure: 10, gas box; 20, three-position switch operating mechanism; 21, output shaft; 22, grounding operation shaft; 23, closing operation shaft; 24, back plate; 30, circuit breaker operating mechanism; 40, conversion gear set; 41, switch conversion gear; 42, mechanism conversion gear; 421, gear mounting shaft; 43, gear mounting bracket; 431, shaft positioning hole; 432, gear positioning hole; 44, bearing; 50, input shaft; 501, anti-rotation connection hole; 51, flange. DETAILED DESCRIPTION

[0020] The basic concept of the present invention is to use a conversion gear set to convert the rotational power output by the output shaft of the operating mechanism into the rotational power required by the input shaft of the switch, so that the operating mechanisms of switch cabinets of different voltage and current levels can be universal, thereby reducing the production cost of the switch cabinet.

[0021] The following is a specific description with reference to embodiments.

[0022] Embodiments of the switch cabinet of the present invention: The switch cabinet includes a cabinet body, on which a switch and an operating mechanism are installed. The operating mechanism has an output shaft, and the switch has an input shaft. The output shaft of the operating mechanism is transmission-connected to the input shaft of the switch through a conversion gear set, and each gear of the conversion gear set has a transmission ratio that satisfies the output shaft of the operating mechanism to drive the input shaft of the switch to perform switching actions.

[0023] Specifically, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the switch cabinet in this embodiment is a pneumatic switch cabinet, and the cabinet of the switch cabinet includes a gas box 10, in which a three-position switch and a circuit breaker are installed, and the circuit breaker is a load switch, and a three-position switch operating mechanism 20 and a circuit breaker operating mechanism 30 are arranged outside the gas box 10. The operation panel of the cabinet of the switch cabinet is located at the front side of the gas box 10, and the gas box 10 has a front side box wall. The space between the front side box wall of the gas box 10 and the operation panel of the cabinet forms an installation space for the three-position switch operating mechanism 20 and the circuit breaker operating mechanism 30. The three-position switch operating mechanism 20 and the circuit breaker operating mechanism 30 are both fixed on the outer side surface of the front side box wall of the gas box 10. The cabinet is closer to the switch body as it moves away from the cabinet operation panel. The three-position switch operating mechanism 20 and the circuit breaker operating mechanism 30 are arranged left and right. The three-position switch operating mechanism 20 is connected to the three-position switch body in the gas box 10 to drive the three-position switch body to open and close, and the circuit breaker operating mechanism 30 is connected to the circuit breaker body in the gas box 10 to drive the circuit breaker body to open and close. The transmission connection structure between the switch body and the corresponding operating mechanism is provided with a dynamic sealing structure at the front wall of the gas box 10 to maintain the sealing state of the gas box 10.

[0024] The three-position switch operating mechanism 20 includes a frame, on which an output shaft 21, a grounding operating shaft 22, and a closing operating shaft 23 are rotatably mounted. The three-position switch operating mechanism 20 is a double-shaft operating mechanism, and the front ends of the grounding operating shaft 22 and the closing operating shaft 23 are both provided with structures for cooperating with an operating handle. By rotating the closing operating shaft 23 with the operating handle, the closing position and the opening position of the three-position switch can be switched, and by rotating the grounding operating shaft 22 with the operating handle, the grounding position and the opening position of the three-position switch can be switched. The frame of the three-position switch operating mechanism 20 includes a rear plate 24, on which a connecting column extending backward is provided for connecting to the front wall of the gas box 10, and the rear ends of the grounding operating shaft 22 and the closing operating shaft 23 are rotatably mounted on the rear plate 24, and the rear plate 24 is provided with a mounting hole for rotatably mounting the output shaft 21, and the rear end of the output shaft 21 passes through a section of the rear plate 24 backward to form an output end for outputting power to the three-position switch. The output shaft 21 is connected to the closing operation shaft 23 and the grounding operation shaft 22 through gear transmission. When the closing operation shaft 23 and the grounding operation shaft 22 rotate, they can drive the output shaft 21 to rotate, and output power to the three-position switch through the output shaft 21.

[0025] The three-position switch is a direct-acting switch, and has a transmission main shaft, which is used to drive the output shaft 21 of the three-position operating mechanism, and the transmission main shaft is connected to the moving contact of the three-position switch through a gear rack mechanism. The output shaft 21 of the three-position operating mechanism rotates, which can drive the transmission main shaft of the three-position switch to rotate. When the transmission main shaft rotates, the moving contact of the three-position switch can be driven to move linearly through the gear rack mechanism, thereby realizing the opening and closing actions of the three-position switch.

[0026] The dynamic sealing structure of the transmission connection structure between the three-position switch body and the three-position operating mechanism in this embodiment is a dynamic sealing component, which is combined with the dynamic sealing structure of the three-position switch body and the three-position operating mechanism. Figure 5 , Figure 6 The dynamic seal assembly includes a flange 51 and a rotating shaft. The rotating shaft is an input shaft 50. The flange 51 constitutes the fixed part of the dynamic seal assembly and is fixed on the front wall of the air box 10. The rotating shaft constitutes the rotating part of the dynamic seal assembly and is installed in the center hole of the flange 51 for sealing and rotation. The inner end of the rotating shaft is located in the air box 10 and is fixedly connected to the transmission main shaft of the three-position switch. The outer end of the rotating shaft is located outside the air box 10 and is used for transmission connection with the output shaft 21 of the three-position switch operating mechanism 20. The rotating shaft constitutes the input shaft 50 of the three-position switch for inputting power to the three-position operating mechanism. The outer end of the input shaft 50 constitutes the input end. The part where the moving contact and the static contact of the three-position switch are located is the switch body. The switch body is located in the air box 10. The transmission main shaft is located in the air box 10. The transmission main shaft of the three-position switch is transmission-connected with the three-position operating mechanism outside the air box 10 through the dynamic seal assembly.

[0027] In order to improve the versatility of the three-position operating mechanism, the output shaft 21 of the three-position operating mechanism is connected to the input shaft 50 of the three-position switch through the conversion gear set 40. The three-position operating mechanism and the three-position switch constitute an operating mechanism and a switch connected to each other through the conversion gear set 40. The rotating gear set includes a switch conversion gear 41 and a mechanism conversion gear 42. The switch conversion gear 41 is connected to the input shaft 50 of the three-position switch in a non-rotatable manner, and the mechanism conversion gear 42 is connected to the output shaft 21 of the three-position mechanism in a non-rotatable manner. Each gear of the conversion gear set 40 has a transmission ratio that satisfies the output shaft 21 of the three-position operating mechanism to drive the input shaft 50 of the three-position switch to perform the opening and closing actions of the three-position switch. The transmission ratio of each gear of the conversion gear set 40 is used to convert and connect the transmission between the output shaft 21 of the three-position switch operating mechanism 20 and the input shaft 50 of the three-position switch. When the rotation direction and rotation angle of the output shaft 21 of the three-position operating mechanism are different from the rotation direction and rotation angle required by the input shaft 50 of the three-position switch, that is, when the rotation stroke is different, the conversion gear set 40 can be used to change the direction and speed, so that the rotation power output by the output shaft 21 of the three-position switch operating mechanism 20 is converted into the rotation power required for the input shaft 50 of the three-position switch to perform the opening and closing actions. In this way, the same specification of the three-position switch operating mechanism 20 can be used for three-position switches with different rotation strokes of the input shaft 50, thereby improving the versatility of the three-position operating mechanism. The three-position operating mechanisms of switch cabinets with different voltage and current levels can be universal, which is beneficial to reducing the production cost of the switch cabinet.

[0028] In this embodiment, the operating mechanism and the switch that are connected by the conversion gear set 40 are three-position operating mechanisms and three-position switches, so that the three-position operating mechanisms can be universal. In other embodiments, according to the configuration of the switch cabinet, the operating mechanism and the switch that are connected by the conversion gear set can also be an isolating switch and an isolating switch operating mechanism without a grounding function, or a circuit breaker and a circuit breaker operating mechanism. It is applicable to switches and operating mechanisms that require rotational power transmission.

[0029] Combination Figure 7 , Figure 8 , Fig. 9 , Fig.10The front wall of the air box 10 constitutes a mechanism mounting plate, the three-position switch operating mechanism 20 and the circuit breaker operating mechanism 30 are mounted on the outer side of the mechanism mounting plate, the three-position switch body and the circuit breaker body are located on the inner side of the mechanism mounting plate, and a gear mounting bracket 43 is fixed to the outer side of the mechanism mounting plate. The mechanism conversion gear 42 of the conversion gear set 40 is rotatably mounted on the gear mounting bracket 43, and the mechanism conversion gear 42 constitutes the gear of the conversion gear set 40 for connecting the output shaft 21 for locking rotation. The gear mounting bracket 43 provided separately is convenient for installing the gear of the conversion gear set 40, and the mechanism conversion gear 42 is rotatably mounted on the gear mounting bracket 43 to facilitate the fixed installation of the three-position operating mechanism and to facilitate docking with the output shaft 21. In other embodiments, the gear mounting bracket may not be provided, the mechanism conversion gear is directly mounted on the rear end of the output shaft, and the switch conversion gear is locked and mounted on the input shaft. In other embodiments, a mounting shaft can be set at the center of the mechanism conversion gear and the switch conversion gear, and the mounting shaft can be rotatably mounted on the gear mounting bracket. The mechanism conversion gear and the switch conversion gear can be rotatably mounted on the gear mounting bracket. The mounting shaft at the center of the mechanism conversion gear is connected to the output shaft for locking rotation, and the mounting shaft at the center of the switch conversion gear is connected to the input shaft for locking rotation.

[0030] The gear mounting bracket 43 includes a main plate body and various legs arranged at the edge of the main plate body for fixed connection to the front wall of the air box 10. The main plate body of the gear mounting bracket 43 is provided with a shaft positioning hole 431 and a gear positioning hole 432. The shaft positioning hole 431 constitutes a positioning hole for the input shaft 50 to fit through. The switch conversion gear 41 constitutes a gear of the conversion gear set 40 for being connected to the input shaft 50 for rotation prevention. The flange 51 of the dynamic seal assembly is located between the main plate body of the gear mounting bracket 43 and the front wall of the air box 10. The flange 51 is fixed on the outer surface of the front wall of the air box 10. The inner end of the input shaft 50 extends out of the center hole of the flange 51 and extends to the inner cavity of the air box 10. The outer end of the input shaft 50 extends out of the center hole of the flange 51 and passes through the shaft positioning hole 431. The switch conversion gear 41 is connected to the part of the input shaft 50 that passes out of the shaft positioning hole 431. The mounting shaft disposed at the center of the mechanism conversion gear 42 is the gear mounting shaft 421, and the gear mounting shaft 421 is adapted to pass through the gear positioning hole 432. The shaft positioning hole 431 and the gear positioning hole 432 disposed on the same gear mounting bracket 43 are used to position the input shaft 50 and the gear mounting shaft 421, respectively, so as to ensure the relative position of the switch conversion gear 41 and the mechanism conversion gear 42. In other embodiments, the shaft positioning hole may not be provided, the gear mounting bracket may be smaller in size, the input shaft may be located on the upper side of the gear mounting bracket, and the input shaft may be fixed on the side wall of the air box by the dynamic seal assembly to maintain its position.

[0031] The meshing part of the switch conversion gear 41 and the mechanism conversion gear 42 is located on the front side of the main body of the gear mounting bracket 43, and the switch conversion gear 41 is located on the upper side of the mechanism conversion gear 42. The switch conversion gear 41 is provided with a center hole to be mounted on the input shaft 50. The switch conversion gear 41 and the input shaft 50 are connected by a spline to prevent rotation. The inner walls of the two ends of the center hole of the switch conversion gear 41 are respectively provided with a clamping groove, so that after the switch conversion gear 41 is mounted on the input shaft 50, a spring retaining ring is installed in the clamping groove to cooperate with the shaft shoulder of the input shaft 50 to limit the axial position of the switch conversion gear 41. The outer end of the input shaft 50 does not protrude from the center hole of the switch conversion gear 41 to save space. A fixed sleeve is provided at the gear positioning hole 432 on the rear side of the main body of the gear mounting bracket 43, and a bearing 44 is installed in the fixed sleeve. The part of the gear mounting shaft 421 of the mechanism conversion gear 42 that passes through the fixed sleeve is rotatably assembled in the fixed sleeve through the bearing 44, and the part of the gear mounting shaft 421 that passes backward through the bearing 44 is clamped with a spring retaining ring for axial limitation. The center hole of the mechanism conversion gear 42 is an oblong hole, which is a front-to-rear through hole. The rear end of the output shaft 21 is a flat structure adapted to the oblong hole. The rear end of the output shaft 21 is inserted into the center hole of the mechanism conversion gear 42 to form a non-rotating connection.

[0032] The front side wall of the air box 10 constitutes the side wall of the air box 10 to which the flange 51 of the dynamic sealing assembly is fixed. A sealing ring is provided between the flange 51 and the side wall of the air box 10, and the input shaft 50 is sealed with the flange 51. The inner end of the input shaft 50 is provided with a non-rotation connection hole 501, which is a blind hole and a hexagonal hole. The transmission main shaft has a non-rotation connection end adapted to extend into the non-rotation connection hole 501 to form a non-rotation fit, which is conducive to ensuring the strength of the transmission main shaft while ensuring the seal. In other embodiments, a non-rotation fit hole can also be provided on the transmission main shaft for the inner end of the input shaft to extend into to form a non-rotation fit.

[0033] The switch cabinet in this embodiment is a pneumatic switch cabinet, and the rotating shaft of the dynamic seal assembly is used to form the input shaft 50. The switch conversion gear 41 is fixedly mounted on the input shaft 50, which can save the front and rear space required for arranging the conversion gear set 40, and the structure is compact. In other embodiments, when the transmission main shaft directly extends out of the air box and is rotationally sealed with the side wall of the air box, the switch conversion gear can also be directly mounted on the transmission main shaft, and the transmission main shaft constitutes the input shaft. In other embodiments, if the switch cabinet is a non-pneumatic switch cabinet, the cabinet body is no longer provided with an air box, and there is no need to set a dynamic seal assembly. The transmission main shaft of the switch is connected to the switch conversion gear of the conversion gear set, and the transmission main shaft constitutes the input shaft.

[0034] The conversion gear set 40 has two gears, a switch conversion gear 41 and a mechanism conversion gear 42. The meshing transmission of the two gears can change the rotation direction. When the output shaft 21 drives the input shaft 50 to rotate through the conversion gear set 40, the rotation direction of the output shaft 21 is opposite to the rotation direction of the input shaft 50, thereby adapting to the installation posture of the three-position switch and ensuring versatility. In other embodiments, the conversion gear set can also have three gears, which are meshed in sequence, wherein the gear connected between the mechanism conversion gear and the switch conversion gear is an intermediate gear, and the meshing transmission of the three gears can not change the rotation direction, and the transmission ratio design of the three gears can adapt to the rotation angle change from the output shaft to the input shaft.

[0035] When the output shaft 21 drives the input shaft 50 to rotate through the conversion gear set 40, the rotation speeds of the switch conversion gear 41 and the mechanism conversion gear 42 are different, so that the rotation angle can be changed while changing the rotation direction. In other implementations, the rotation speeds of the switch conversion gear and the mechanism conversion gear can also be made the same, and only the rotation direction is changed. In this embodiment, the diameter of the mechanism conversion gear 42 is larger than the diameter of the switch conversion gear 41, and the rotation speed of the switch conversion gear 41 is larger than the rotation speed of the mechanism conversion gear 42. The transmission main shaft of the switch can obtain a larger rotation angle to drive the moving contact to a larger displacement, so that the operating mechanism of the low voltage and current level can adapt to the switch of the high voltage and current level.

[0036] By changing the number of teeth of the switch conversion gear 41 and the mechanism conversion gear 42, different ratios are obtained, so that the corresponding operating mechanism can be matched with the switch, thereby achieving the versatility of the operating mechanism. By converting the rotation stroke, the dual-axis operating mechanism of the 630A ring main unit product can be matched to the 1250A ring main unit product, reducing production and design costs.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A switch cabinet, comprising a cabinet body, a switch and an operating mechanism are mounted on the cabinet body, the operating mechanism has an output shaft, and the switch has an input shaft, wherein: The output shaft of the operating mechanism is transmission-connected to the input shaft of the switch through a conversion gear set, and each gear of the conversion gear set has a transmission ratio that satisfies the output shaft of the operating mechanism to drive the input shaft of the switch to perform switch opening and closing actions.

2. The switch cabinet according to claim 1, characterized in that: The cabinet includes a mechanism mounting plate, the operating mechanism is mounted on the outer side of the mechanism mounting plate, the switch body is located on the inner side of the mechanism mounting plate, a gear mounting bracket is fixed to the outer side of the mechanism mounting plate, and at least one gear of the conversion gear set is rotatably mounted on the gear mounting bracket.

3. The switch cabinet according to claim 2, characterized in that: The gear of the conversion gear set, which is used for preventing rotation and connecting the output shaft, is rotatably mounted on the gear mounting bracket.

4. The switch cabinet according to claim 3, characterized in that: The gear mounting bracket is provided with a positioning hole for the input shaft to fit through, and the conversion gear set includes a gear for being connected to the input shaft in a non-rotatable manner.

5. The switch cabinet according to any one of claims 1 to 4, characterized in that: The switch cabinet is an inflatable switch cabinet. The cabinet body includes an air box. The switch body is arranged in the air box. The switch includes a moving contact and a transmission main shaft for driving the moving contact to perform opening and closing actions. The transmission main shaft is connected to a dynamic sealing assembly. The dynamic sealing assembly includes a flange and a rotating shaft rotatably arranged in a center hole of the flange. The flange is fixed to the side wall of the air box. The inner end of the rotating shaft is connected to the transmission main shaft for rotation prevention. The outer end of the rotating shaft is connected to the corresponding gear of the conversion gear set for rotation prevention. The rotating shaft constitutes the input shaft.

6. The switch cabinet according to claim 5, characterized in that: A stop-rotation connection hole is provided at the inner end of the rotating shaft, and the stop-rotation connection hole is a blind hole. The transmission main shaft has a stop-rotation connection end adapted to extend into the stop-rotation connection hole to form a stop-rotation fit.

7. The switch cabinet according to any one of claims 1 to 4, characterized in that: The switch cabinet is a non-inflatable switch cabinet. The switch includes a moving contact and a transmission main shaft for driving the moving contact to perform opening and closing actions. The transmission main shaft is fixedly connected to the corresponding gear of the conversion gear set, and the transmission main shaft constitutes the input shaft.

8. The switch cabinet according to any one of claims 1 to 4, characterized in that: The conversion gear set has two gears, and the two gears are respectively connected to the output shaft and the input shaft in a non-rotatable manner.

9. The switch cabinet according to claim 8, characterized in that: When the output shaft drives the input shaft to rotate through the conversion gear set, the rotation speeds of the two gears are different.

10. The switch cabinet according to any one of claims 1 to 4, characterized in that: The conversion gear set has three gears, which are meshed in sequence. The gear of the conversion gear set that is fixedly connected to the output shaft is a mechanism conversion gear, and the gear of the conversion gear set that is fixedly connected to the input shaft is a switch conversion gear. When the output shaft drives the input shaft to rotate through the conversion gear set, the rotational speed of the mechanism conversion gear is different from the rotational speed of the switch conversion gear.

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