Three-position mechanism position signal operating mechanism and isolated ground switch

Abstract

The application discloses a three-position mechanism position signal operating mechanism and an isolated grounding switch. The mechanism comprises a top plate and a bottom plate, the top plate is provided with a second position signal device, and the bottom plate is provided with a first position signal device; a transmission device is connected with a driving device at one end and connected with the first position signal device and the second position signal device at the other end; after the operating mechanism receives an operation instruction, the driving device drives the transmission device to drive the first position signal device and the second position signal device to displace respectively, and double signal confirmation is performed. The double signal confirmation mechanism effectively avoids the possible misjudgment of a single signal, improves the accuracy of the position signal, and ensures that the background control system and the protection equipment can perform logical judgment based on accurate data.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of high-voltage power transmission and distribution switches, and particularly relates to a three-position mechanism position signal operating mechanism and an isolated grounding switch. BACKGROUND

[0002] In the rapid development and wide application of high-voltage power transmission and distribution systems, SF6 gas-insulated fully enclosed combined electrical apparatus (GIS) has become an indispensable core device in the system operation and protection field due to its excellent insulation performance, compact structural design, and high operation reliability. GIS integrates high-voltage electrical components such as circuit breakers, disconnectors (DS), and grounding switches (ES) in a sealed metal shell filled with SF6 gas, effectively isolating the external environment and improving the safety and stability of the system.

[0003] As key components in GIS, disconnectors (DS) and grounding switches (ES) bear the responsibility of ensuring system safety isolation and grounding. They not only need to accurately and reliably open and close during normal operation, but also must provide accurate position signals at any time to reflect the actual state of the switch. These position signals are usually emitted by the operating mechanism matched with the switch and serve as the basis data for logic judgment by the background control system and protection equipment, which is crucial for maintaining the safe operation of the entire high-voltage power transmission and distribution system.

[0004] However, in the existing technology, there is a problem with the first position signal used by the operating mechanism for interlocking function: this signal is often emitted in advance before the actual switch reaches the stable through-flow position. This asynchronization between the signal and the actual position of the switch may lead to misjudgment of the switch state by the background control system, and further cause a series of serious consequences. For example, when the disconnectors or grounding switches have not been completely closed, if the control system mistakenly believes that they have been closed, it may incorrectly allow current to pass through, causing the equipment to withstand an undue voltage or current impact, which may lead to a decline in insulation performance over time, and even cause insulation failure or serious accidents such as equipment burnout.

[0005] In addition, the advance emission of this position signal may also affect the correct action of the protection equipment, making it unable to timely and accurately remove the fault point during system failure, further exacerbating the safety risk of the system. Therefore, there is an urgent need for an operating mechanism that can accurately reflect the actual position state of the switch and synchronize the signal emission with the switch action, to improve the operation reliability and safety of the high-voltage power transmission and distribution system, and avoid equipment damage and safety accidents caused by misjudgment of the position signal. SUMMARY

[0006] The present application aims to provide a three-position mechanism position signal operating mechanism and an isolated grounding switch, so as to solve the technical defect that the signal is often sent in advance before the actual switch reaches the stable on-flow position, causing the signal to be out of synchronization with the actual position of the switch.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] In a first aspect, a three-position mechanism position signal operating mechanism is provided, comprising:

[0009] A top plate and a bottom plate, the top plate being provided with a second position signal device, and the bottom plate being provided with a first position signal device;

[0010] A transmission device, one end of which is connected with a driving device, and the other end of which is connected with the first position signal device and the second position signal device;

[0011] After the operating mechanism receives an operation instruction, the driving device drives the transmission device to drive the first position signal device and the second position signal device to displace, and double signal confirmation is performed.

[0012] Further, the transmission device comprises a first transmission assembly and a second transmission assembly, and the first transmission assembly and the second transmission assembly are in transmission connection;

[0013] The second position signal device comprises a DS opening position monitoring switch, a DS closing position monitoring switch, an ES opening position monitoring switch, an ES closing position monitoring switch, and a rack plate, the DS opening position monitoring switch and the DS closing position monitoring switch being located at one end of the top plate, and the ES opening position monitoring switch and the ES closing position monitoring switch being located at the other end of the top plate;

[0014] The rack plate is arranged in the middle of the top plate, and the periphery of the rack plate is in contact with the DS opening position monitoring switch, the DS closing position monitoring switch, the ES opening position monitoring switch, and the ES closing position monitoring switch;

[0015] One end of the second transmission assembly is connected with the driving device, and the other end thereof is connected with the rack plate; under the driving of the driving device, the second transmission assembly drives the rack plate to displace;

[0016] The first position signal device comprises a DS auxiliary switch assembly, a DS auxiliary switch driving plate, an ES auxiliary switch driving plate, and an ES auxiliary switch assembly, the DS auxiliary switch driving plate being arranged at one end of the bottom plate, and the ES auxiliary switch driving plate being arranged at the other end of the bottom plate;

[0017] The DS auxiliary switch assembly is connected with a DS auxiliary switch driving board, the ES auxiliary switch driving board is connected with an ES auxiliary switch assembly, one end of the first transmission assembly is connected with a driving device, and the other end is matched with the DS auxiliary switch driving board and the ES auxiliary switch driving board.

[0018] Further, the rack plate is in a U-shaped structure, one side of the opening end of the rack plate is provided with a tooth, and the tooth is engaged with the second transmission assembly.

[0019] The opposite outer sides of the rack plate are provided with protruding contours, one of the protruding contours is matched with the DS opening position monitoring switch and the DS closing position monitoring switch, and the other protruding contour is matched with the ES opening position monitoring switch and the ES closing position monitoring switch.

[0020] The two ends of the rack plate provided with the protruding contours are both provided with guide grooves, the top plate is further provided with a mounting plate, one end of the second transmission assembly is connected with the mounting plate, and the other end is matched with the guide grooves to drive the rack plate to displace left and right.

[0021] Further, the mounting plate is provided with a shaft pin, the outer side of the shaft pin is provided with a guide sleeve, the guide sleeve is abutted with the rack plate and fixes the rack plate.

[0022] The second transmission assembly comprises a first spur gear, a second spur gear, a pinion, an output gear shaft and a shaft, one end of the shaft is hinged to the mounting plate through a second bearing, the other end of the shaft is connected with the second spur gear and the pinion, and the output shaft gear is connected with the first spur gear.

[0023] The first spur gear and the second spur gear are engaged, and the pinion is engaged with the tooth.

[0024] Further, the diameters of the first spur gear and the second spur gear are equal.

[0025] Further, the second spur gear is hinged to the mounting plate through a first bearing.

[0026] Further, the DS auxiliary switch assembly and the ES auxiliary switch assembly are connected with an auxiliary switch mounting plate, the end of the auxiliary switch mounting plate is provided with a crank arm and an opening and closing indication board, the end of the crank arm is connected with a mounting nut, the end of the mounting nut is provided with a driving pin, and the driving pin is provided with a shaft sleeve.

[0027] The first transmission assembly comprises a cam and a ball screw pair, the cam is in transmission connection with the ball screw pair, and the ball screw pair is provided with a nut.

[0028] The DS auxiliary switch driving board and the ES auxiliary switch driving board are identical in structure and are in the shape of π, long grooves are formed in the horizontal ends of the DS auxiliary switch driving board and the ES auxiliary switch driving board, and the nut is slidably connected to the long grooves.

[0029] The end of one vertical end of the DS auxiliary switch driving board and the ES auxiliary switch driving board is bent and a U-shaped groove is formed in the end, and the U-shaped groove is matched with the driving pin.

[0030] Further, the nut is located in the long groove.

[0031] Further, the long groove is composed of a first long groove, a second long groove and a third long groove, the first long groove and the third long groove are both in an inclined shape, and the second long groove is in a horizontal shape.

[0032] In the second aspect, a kind of isolation ground switch is provided, including switch body, the three-position mechanism position signal operating mechanism as described above is installed on the switch body.

[0033] Compared with the prior art, the present application has the following beneficial effects:

[0034] 1. The first position signal device and the second position signal device in the operating mechanism are respectively arranged on the bottom plate and the top plate. The double-signal design provides double protection for the confirmation of the switch position. When the operating mechanism receives the operation instruction, the driving device drives the transmission device to drive the first position signal device and the second position signal device to displace. Only when both position signal devices confirm that the switch has reached the stable on-flow position, a position signal will be sent. This double-signal confirmation mechanism effectively avoids the misjudgment that may occur with a single signal, improves the accuracy of the position signal, and ensures that the background control system and the protection equipment can make logical judgments based on accurate data.

[0035] 2. By arranging the DS opening position monitoring switch, the DS closing position monitoring switch, the ES opening position monitoring switch and the ES closing position monitoring switch on the top plate, and the rack plate in contact therewith, fine monitoring of the opening and closing positions of the disconnector and the grounding switch is realized. The displacement of the rack plate directly reflects the actual position state of the switch. Through the contact with each position monitoring switch, accurate and reliable position signals can be sent, improving the accuracy and reliability of position monitoring.

[0036] 3. The U-shaped structure of the rack plate and the teeth on one side of the open end thereof are engaged with the second transmission assembly, realizing accurate transmission control. The teeth ensure the stability and accuracy during the transmission process, so that the rack plate can displace according to the predetermined trajectory. Through the engagement of the teeth with the second transmission assembly, the displacement amount of the rack plate can be accurately controlled, thereby accurately reflecting the opening and closing positions of the disconnector and the grounding switch.

[0037] 4、The shaft pin arranged on the mounting plate and the guide sleeve on the outer side abut against the rack plate, thereby fixing the rack plate and providing stable guiding effect; the design of the guide sleeve ensures that the rack plate can keep straight-line movement during displacement, thereby avoiding deviation or shaking and improving the accuracy and reliability of position monitoring.

[0038] 5、The gears with equal diameters can keep the same linear velocity during meshing transmission, which means that the rotation speed of the first spur gear is directly equal to the rotation speed of the second spur gear, thereby realizing constant-speed transmission.

[0039] 6、The first bearing provides stable support for the second spur gear, thereby ensuring that the second spur gear can rotate freely on the mounting plate.

[0040] 7、The end of the auxiliary switch mounting plate is provided with an on-off indication board, which can intuitively display the on-off state of the switch; in addition, the design of the on-off indication board improves the operation convenience and safety of the equipment, and the operator can quickly understand the state of the switch, thereby avoiding misoperation.

[0041] 8、The nut is located in the long groove and can reliably drive the driving pin, thereby realizing the rotation of the crank arm. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0043] Figure 1 The overall schematic diagram of the three-position mechanism position signal operating mechanism provided by the present application is shown in the figure.

[0044] Figure 2 The A-A sectional view of the present application is shown in the figure. Figure 1

[0045] Figure 3 The schematic diagram of the second position signal device in the three-position mechanism position signal operating mechanism provided by the present application is shown in the figure.

[0046] Figure 4 The A-A sectional view of the present application is shown in the figure. Figure 2

[0047] Figure 5 The schematic diagram of the rack plate structure in the three-position mechanism position signal operating mechanism provided by the present application is shown in the figure.

[0048] Figure 6 ​​The first position signal device schematic view in the three-position mechanism position signal operating mechanism provided by the present application;

[0049] Figure 7 The DS auxiliary switch driving plate structure schematic view in the three-position mechanism position signal operating mechanism provided by the present application;

[0050] Figure 8 The right view of the present application Figure 7 ;

[0051] Figure 9 The DS auxiliary switch assembly structure schematic view in the three-position mechanism position signal operating mechanism provided by the present application;

[0052] Figure 10 The A-A sectional view of the present application Figure 9 ;

[0053] Figures 11-13 The first position signal indication state schematic view in the three-position mechanism position signal operating mechanism provided by the present application;

[0054] In the figure: 1, top plate; 2, output gear shaft; 3, second position signal device; 5, cam; 6, ball screw pair; 8, bottom plate; 9, DS opening position monitoring switch; 10, second spur gear; 11, DS closing position monitoring switch; 12, washer; 13, screw; 14, ES opening position monitoring switch; 15, guide sleeve; 16, pin shaft; 17, pinion; 18, ES closing position monitoring switch; 19, first spur gear; 20, rack plate; 21, lining plate; 22, mounting plate; 23, first bearing; 24, shaft; 25, second bearing; 26, flat key; 27, small bearing; 28, DS auxiliary switch assembly; 29, DS auxiliary switch driving plate; 30, ES auxiliary switch driving plate; 31, ES auxiliary switch assembly; 32, DS auxiliary switch; 33, auxiliary switch mounting plate; 34, crank arm; 35, joint; 36, opening and closing indication board; 37, shaft sleeve; 38, driving pin; 39, mounting nut; 40, main shaft; 41, gear; 42, first motor; 43, side plate; 44, tapered roller bearing; 45, second motor. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the application.

[0057] It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0058] In the description of embodiments of the application, it should be noted that if the terms "upper", "lower", "horizontal", "inner" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the application is used, it is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0059] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0060] In the description of embodiments of the application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the communication between the two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0061] In the rapid development and wide application of high-voltage power transmission systems, SF6 gas insulated fully enclosed combined electrical apparatus (GIS) has become an indispensable core equipment in the field of system operation and protection due to its excellent insulation performance, compact structure design and high operation reliability. GIS integrates high-voltage electrical components such as circuit breakers, disconnecting switches (DS) and grounding switches (ES) in a sealed metal shell filled with SF6 gas, effectively isolating the influence of the external environment and improving the safety and stability of the system.

[0062] Disconnectors (DS) and earthing switches (ES) are key components in GIS, which are responsible for ensuring the safe isolation and grounding of the system. They not only need to be accurately and reliably switched on and off during normal operation, but also must provide accurate position signals at any time to reflect the actual state of the switch. These position signals are usually sent by the operating mechanism matched with the switch, and are used as the basis data for the logic judgment of the background control system and protection equipment, which is crucial for maintaining the safe operation of the entire high-voltage power transmission and distribution system.

[0063] However, in the prior art, there is a problem with the first position signal used by the operating mechanism for interlocking function: this signal is often sent in advance before the actual switch reaches the stable on-flow position. This asynchronization between the signal and the actual position of the switch may lead to misjudgment of the switch state by the background control system, and further cause a series of serious consequences. For example, when the disconnector or earthing switch has not been completely closed, if the control system mistakenly believes that it has been closed, it may incorrectly allow current to pass through, causing the equipment insulation to withstand an undue voltage or current impact, which may lead to a long-term decline in insulation performance, and even cause insulation failure and serious accidents such as equipment burnout.

[0064] In addition, the advance sending of this position signal may also affect the correct action of the protection equipment, so that the protection equipment cannot timely and accurately remove the fault point when the system fails, further exacerbating the safety risk of the system. Therefore, there is an urgent need for an operating mechanism that can accurately reflect the actual position state of the switch and synchronize the signal sending with the switch action, in order to improve the reliability and safety of the high-voltage power transmission and distribution system, and avoid equipment damage and safety accidents caused by misjudgment of the position signal.

[0065] In order to solve the above technical defects, the inventors provide a three-position mechanism position signal operating mechanism and an isolation and earthing switch.

[0066] The invention will be described in further detail below with reference to the accompanying drawings:

[0067] In a first aspect, the embodiments of the present application provide a three-position mechanism position signal operating mechanism, as shown in Figures 1-13As shown, including the top plate 1 and bottom plate 8, the top plate 1 is provided with the second position signal device 3, the bottom plate 8 is provided with the first position signal device; transmission device, one end is connected with the driving device, the other end is connected with the first position signal device and the second position signal device 3; after the operating mechanism receives the operation instruction, the driving device drives the transmission device, respectively drives the first position signal device and the second position signal device 3 displacement, and carries out double signal confirmation. In the above structure, because the first position signal device and the second position signal device 3 are arranged on the bottom plate 8 and the top plate 1 respectively, double protection is provided for the confirmation of switch position. When the operating mechanism receives the operation instruction, the driving device drives the transmission device, respectively drives the first position signal device and the second position signal device 3 displacement. Only when both position signal devices confirm that the switch has reached the stable flow position, the position signal will be sent, this double signal confirmation mechanism effectively avoids the misjudgment of single signal, improves the accuracy of position signal, ensures that the background control system and protection equipment can make logical judgment based on accurate data. Secondly, through the precise cooperation of the transmission device and the driving device, the operating mechanism can ensure that the sending of the position signal is synchronized with the actual action of the switch. When the switch is completely closed or separated, the position signal will be sent, avoiding the problem that the signal is sent in advance in the prior art. The synchronization of signal and switch action ensures that the background control system can master the state of the switch in real time and accurately, so as to make correct control decision, and improves the reliability of position signal. In addition, reliable position signal can ensure that the protection equipment can timely and accurately remove the fault point when the system fails, avoid the damage of equipment and safety accidents caused by misjudgment of position signal, significantly improve the operation reliability and safety of high-voltage power transmission and transformation system, and provide strong guarantee for stable operation of the system.

[0068] Further, as Figure 3As shown, the transmission device includes a first transmission assembly and a second transmission assembly, which are drivingly connected between the first transmission assembly and the second transmission assembly, achieving the cooperative control of the rack plate 20 and the auxiliary switch driving plate by the driving device. The second position signal device 3 includes a DS opening position monitoring switch 9, a DS closing position monitoring switch 11, an ES opening position monitoring switch 14, an ES closing position monitoring switch 18, and a rack plate 20. The DS opening position monitoring switch 9 and the DS closing position monitoring switch 11 are located at one end of the top plate 1, and the ES opening position monitoring switch 14 and the ES closing position monitoring switch 18 are located at the other end of the top plate 1. The rack plate 20 is arranged in the middle of the top plate 1, and the periphery of the rack plate 20 is in contact with the DS opening position monitoring switch 9, the DS closing position monitoring switch 11, the ES opening position monitoring switch 14, and the ES closing position monitoring switch 18. By arranging the DS opening position monitoring switch 9, the DS closing position monitoring switch 11, the ES opening position monitoring switch 14, and the ES closing position monitoring switch 18 on the top plate 1, and the rack plate 20 in contact therewith, fine monitoring of the opening and closing positions of the disconnector DS and the grounding switch ES is achieved. The displacement of the rack plate 20 directly reflects the actual position state of the switch, and through the contact with each position monitoring switch, the position signal can be accurately and reliably sent, improving the accuracy and reliability of position monitoring.

[0069] One end of the second transmission assembly is connected with the driving device, and the other end is connected with the rack plate 20. Under the driving of the driving device, the second transmission assembly drives the rack plate 20 to displace. The first position signal device includes a DS auxiliary switch assembly 28, a DS auxiliary switch driving plate 29, an ES auxiliary switch driving plate 30, and an ES auxiliary switch assembly 31. The DS auxiliary switch driving plate 29 is arranged at one end of the bottom plate 8, and the ES auxiliary switch driving plate 30 is arranged at the other end of the bottom plate 8. The DS auxiliary switch assembly 28 is connected with the DS auxiliary switch driving plate 29, and the ES auxiliary switch driving plate 30 is connected with the ES auxiliary switch assembly 31. One end of the first transmission assembly is connected with the driving device, and the other end is matched with the DS auxiliary switch driving plate 29 and the ES auxiliary switch driving plate 30. The second transmission assembly is responsible for driving the rack plate 20 to displace, and the position state of the switch is confirmed through the contact with the position monitoring switch. The first transmission assembly is matched with the DS auxiliary switch driving plate 29 and the ES auxiliary switch driving plate 30, further confirming and transmitting the position signal. This design of double transmission assemblies improves the transmission efficiency and stability of the operating mechanism, and ensures the accurate transmission of the position signal. In addition, the DS auxiliary switch assembly 28 and the ES auxiliary switch assembly 31 arranged on the bottom plate 8, and the auxiliary switch driving plate matched therewith, form a redundant confirmation mechanism for the position signal. Even if the contact between the rack plate 20 and the position monitoring switch fails, the auxiliary switch assembly can provide additional position signal confirmation, improving the fault tolerance and reliability of the system.

[0070] As shown in Figure 5 The rack plate 20 is a U-shaped structure, and the side of the open end is provided with teeth which are engaged with the second transmission assembly to achieve precise transmission control. The design of the teeth ensures the stability and accuracy during transmission, so that the rack plate 20 can displace according to the predetermined trajectory. Moreover, the displacement amount of the rack plate 20 can be accurately controlled through the engagement of the teeth and the second transmission assembly, so as to accurately reflect the opening and closing positions of the disconnector DS and the grounding switch ES. The opposite outer sides of the rack plate 20 are provided with protruding profiles, one of which cooperates with the DS opening position monitoring switch 9 and the DS closing position monitoring switch 11, and the other of which cooperates with the ES opening position monitoring switch 14 and the ES closing position monitoring switch 18. During displacement, the rack plate 20 can trigger the corresponding position monitoring switches at the same time, achieving simultaneous monitoring of multiple positions and improving the efficiency and accuracy of position monitoring. The two ends of the rack plate 20 provided with protruding profiles are provided with guide grooves, and the top plate 1 is further provided with a mounting plate 22. One end of the second transmission assembly is connected with the mounting plate 22, and the other end is cooperated with the guide grooves to drive the rack plate 20 to displace left and right. The design of the guide grooves provides a stable guiding effect for the displacement of the rack plate 20, ensuring the linearity and stability of the rack plate 20 during displacement and avoiding position monitoring errors caused by deviation or shaking.

[0071] As shown in Figure 4 The mounting plate 22 is provided with a pin shaft 16, and the outer side of the pin shaft 16 is provided with a guide sleeve 15 which is in abutment with the rack plate 20 and fixes the rack plate 20. The pin shaft 16 provided on the mounting plate 22 and the guide sleeve 15 on the outer side are in abutment with the rack plate 20 to fix the rack plate 20, and at the same time provide a stable guiding effect. The design of the guide sleeve 15 ensures that the rack plate 20 can maintain linear motion during displacement, avoiding deviation or shaking and thus improving the accuracy and reliability of position monitoring. The second transmission assembly includes a first spur gear 19, a second spur gear 10, a pinion 17, an output gear shaft 2 and a shaft 24. One end of the shaft 24 is hinged to the mounting plate 22 through a second bearing 25, and the other end of the shaft 24 is connected with the second spur gear 10 and the pinion 17. The output gear shaft 2 is connected with the first spur gear 19. Among them, the first spur gear 19 and the second spur gear 10 are engaged, and the pinion 17 is engaged with the teeth. The second transmission assembly includes a first spur gear 19, a second spur gear 10, a pinion 17, an output gear shaft 2 and a shaft 24, which constitutes an efficient gear transmission system. One end of the shaft 24 is hinged to the mounting plate 22 through a second bearing 25, and the other end is connected with the second spur gear 10 and the pinion 17, realizing the transmission and conversion of transmission power. The first spur gear 19 is engaged with the second spur gear 10, and the pinion 17 is engaged with the teeth of the rack plate 20, forming a stable transmission chain and ensuring the accuracy and efficiency of transmission.

[0072] In this embodiment, the first spur gear 19 and the second spur gear 10 have the same diameter. The second spur gear 10 is hinged to the mounting plate 22 via the first bearing 23. Gears with equal diameters maintain the same linear velocity during meshing, and the rotational speed of the first spur gear 19 is directly equal to the rotational speed of the second spur gear 10, achieving constant-speed transmission and ensuring the stability and consistency of the transmission. Secondly, the contact pressure distribution on the tooth surfaces is more uniform during meshing, reducing the possibility of localized wear and facilitating maintenance. The first bearing 23 provides stable support for the second spur gear 10, ensuring its free rotation on the mounting plate 22. Simultaneously, the hinged design of the bearing reduces friction and wear, making the rotation of the second spur gear 10 smoother and more stable.

[0073] like Figures 6-8 As shown, auxiliary switch mounting plates 33 are connected to the DS auxiliary switch assembly 28 and the ES auxiliary switch assembly 31. The end of the auxiliary switch mounting plate 33 is provided with a crank arm 34 and an open / close indicator 36. The open / close indicator 36 at the end of the auxiliary switch mounting plate 33 can intuitively display the open / close status of the switch, improving the ease of operation and safety of the equipment. Operators can quickly understand the status of the switch and avoid misoperation.

[0074] The end of the crank arm 34 is connected to a mounting nut 39, and the end of the mounting nut 39 is provided with a drive pin 38, on which a bushing 37 is provided. The first transmission component includes a cam 5 and a ball screw pair 6. The cam 5 is drivenly connected to the ball screw pair 6, and a nut is provided on the ball screw pair 6. The drive connection between the cam 5 and the ball screw pair 6 realizes the transmission mechanism of converting rotational motion into linear motion. The nut on the ball screw pair 6 is slidably connected to the elongated slots on the horizontal ends of the DS auxiliary switch drive board 29 and the ES auxiliary switch drive board 30, making the transmission more flexible and reliable. The DS auxiliary switch drive board 29 and the ES auxiliary switch drive board 30 have the same structure, both being π-shaped. The horizontal ends of the DS auxiliary switch drive board 29 and the ES auxiliary switch drive board 30 are provided with elongated slots, on which the nut is slidably connected. The end of one of the vertical ends of the DS auxiliary switch drive board 29 and the ES auxiliary switch drive board 30 is bent and has a U-shaped groove, which cooperates with the drive pin 38.

[0075] The vertical end of the DS auxiliary switch driving plate 29 and the ES auxiliary switch driving plate 30 is bent and provided with a U-shaped groove, which is matched with the driving pin 38, and the driving pin 38 is provided with a shaft sleeve 37, so that the stability and durability of the driving connection are enhanced, and the accuracy and reliability of the transmission are ensured. The DS auxiliary switch driving plate 29 and the ES auxiliary switch driving plate 30 are both designed in a π shape, and a long groove is provided on the horizontal end. This design makes the driving plate have certain adaptability, and the design of the long groove allows the nut to slide within a certain range, so as to adapt to the needs of different transmission strokes, and improve the versatility and flexibility of the equipment. Specifically, the long groove is composed of a first long groove, a second long groove and a third long groove, the first long groove and the third long groove are both inclined, the second long groove is horizontal, and the nut is located in the long groove. The inclined long groove section can make the nut produce a vertical or horizontal displacement component during movement, and by adjusting the inclination angle of the long groove, the displacement amount and direction of the nut can be accurately controlled. The horizontal second long groove provides a stable transmission stage for the nut, and the nut can move smoothly in this stage, reducing vibration and shaking during transmission.

[0076] In the specific application of the present scheme, the main shaft 40 is arranged between the top plate 1 and the bottom plate 8, the cam 5 and the gear 41 are connected with the main shaft 40 through a hexagon, and the output gear shaft 2 is engaged with the gear 41; the ball screw pair 6 is connected to the side plate 43 through a tapered roller bearing 44 to limit its freedom in the axial direction; the output gear shaft 2 is connected through a hexagonal sleeve and fixed with the second position signal device 3 through a screw 13; the DS auxiliary switch driving plate 29 and the ES auxiliary switch driving plate 30 are connected to the bottom plate 8 through a plurality of regularly arranged small bearings 27, and are limited to move horizontally on the bottom plate 8 through a plurality of washers 12.

[0077] The switching positions of the DS opening position monitoring switch 9, the DS closing position monitoring switch 11, the ES opening position monitoring switch 14 and the ES closing position monitoring switch 18 correspond to the raised profile on the rack plate 20, the rack plate 20 is connected to the mounting plate 22 through a plurality of pin shafts 16 and guide sleeves 15, and is limited to move horizontally on the mounting plate 22 through a plurality of washers 12 corresponding to the pin shafts 16; the teeth on the rack plate 20 are engaged with the pinion 17, and the pinion 17 is fixed to the shaft 24 through a flat key 26 and the second spur gear 10; one end of the shaft 24 is connected to the mounting plate 22 through a second bearing 25, and the second spur gear 10 is engaged with the first spur gear 19 connected to the mounting plate 22 through a first bearing 23; the inner hexagon on the first spur gear 19 is matched with the outer hexagon on the output gear shaft 2; the gusset plate 21 is fixed to the mounting plate 22, so as to limit the freedom of the first bearing 23 and the second bearing 25 except rotation.

[0078] The DS auxiliary switch assembly 28 and the ES auxiliary switch assembly 31 are similar in structure, and include an auxiliary switch mounting plate 33 and a DS auxiliary switch 32 arranged on the auxiliary switch mounting plate 33; an elbow arm 34 is arranged on a square shaft sleeve of the DS auxiliary switch 32, one end of the elbow arm 34 is provided with a driving pin 38, and the driving pin 38 is locked by a mounting nut 39, one end of the driving pin 38 is provided with a shaft sleeve 37, and one end of the square shaft of the DS auxiliary switch 32 is further provided with a split and closing indication board 36 which is connected by a joint 35.

[0079] The first position signal device drives the DS auxiliary switch driving plate 29 and the ES auxiliary switch driving plate 30 by the ball screw pair 6, and then drives the DS auxiliary switch assembly 28 and the ES auxiliary switch assembly 31 to respectively emit position signals at preset positions; the second position signal device 3 is driven by the output gear shaft 2, and then drives the rack plate 20 to do linear reciprocating motion, and switches the respective micro switches to emit position signals at preset positions.

[0080] In the rack plate 20, the two sides of the rack plate are respectively provided with a raised profile based on a reference mark, the starting end of the two sides of the raised profile is provided with a transition section with an angle α, the two sides of the rack plate are further provided with a guide groove with a width d in a penetrating manner, and one side of the hollow part of the middle part of the rack plate is provided with a plurality of teeth. The DS auxiliary switch driving plate 29 is in the shape of a rack with a "π" type, and a long groove with a width h is arranged on the rack, the two ends of the long groove are respectively provided with transition sections with angles α and β, the spacing between the three long grooves before and after the transition is a certain preset value "l", a plurality of guide grooves with a width d are further arranged on the rack, one corner of the "π" is provided as a bent protrusion, and a "U" type groove with a width f and a length g is arranged. Specifically, the ES auxiliary switch driving plate 30 is in a mirror image relationship with the DS auxiliary switch driving plate 29, after the DS auxiliary switch driving plate 29 is combined with the DS auxiliary switch assembly 28, the three long grooves and the transition sections arranged on the DS auxiliary switch driving plate 29 form an intermittent motion trajectory under the driving action of the ball screw pair 6, and from the direction of the split and closing indication board 36, three stable states of "split", "half split and half close", and "close" and two transient transition processes from "split" to "half split and half close" and from "half split and half close" to "close" are presented.

[0081] After the ES auxiliary switch driving plate 30 is combined with the ES auxiliary switch assembly 31, the intermittent motion formed by the DS auxiliary switch driving plate 29 and the DS auxiliary switch assembly 28 is in a mirror image relationship. After the driving pin 38, the elbow arm 34 and the DS auxiliary switch driving plate 29 or the ES auxiliary switch driving plate 30 are matched, the "U" type groove arranged on the DS auxiliary switch driving plate 29 or the ES auxiliary switch driving plate 30 is adapted to the shaft sleeve 37 arranged on one end of the driving pin 38, obviously, the translational stroke of the DS auxiliary switch driving plate 29 or the ES auxiliary switch driving plate 30 corresponds to the rotation angle θ of the elbow arm 34.

[0082] As Figure 6 , Figure 10 and Figure 11 , DS auxiliary switch drive board 29 and DS auxiliary switch assembly 28 combined, DS auxiliary switch drive board 29 set up three long slot and its transition section under the drive of ball screw pair 6, intermittent motion trajectory is formed. With DS closing first position signal conversion process as an example, the nut in ball screw pair 6 starts to move linearly to the left, when moving to the first long slot and the second long slot transition section, DS auxiliary switch drive board 29 moves up under the pushing action of the nut in ball screw pair 6, at the same time, the U-shaped slot on DS auxiliary switch drive board 29 pushes the drive pin 38 in DS auxiliary switch assembly 28 to move; From the direction of the opening and closing indicator 36, the opening and closing indicator 36 first counterclockwise rotates θ / 2, showing the state conversion from "opening" to "half open half closed", the nut in ball screw pair 6 continues to move to the left, obviously, DS auxiliary switch drive board 29 remains stationary in the second long slot, until the nut in ball screw pair 6 moves to the second long slot and the third long slot transition section, DS auxiliary switch drive board 29 continues to move up under the pushing action of the nut in ball screw pair 6, at the same time, the U-shaped slot on DS auxiliary switch drive board 29 pushes the drive pin 38 in DS auxiliary switch assembly 28 to move, from the direction of the opening and closing indicator 36, the opening and closing indicator 36 counterclockwise rotates θ / 2 again, showing the state conversion from "half open half closed" to "closing"; It should be noted that at the end of the second long slot and the third long slot transition section, the state of DS auxiliary switch 32 in DS auxiliary switch assembly 28 changes, and the closing signal is sent. It can be seen that from the direction of the opening and closing indicator 36, three stable states of "opening", "half open half closed" and "closing" and two transient transition processes from "opening" to "half open half closed" and from "half open half closed" to "closing" are presented.

[0083] DS opening first position signal conversion process is the same as DS closing process except that the direction is opposite, ES auxiliary switch drive board 30 and ES auxiliary switch assembly 31 combined, and the intermittent motion composed of DS auxiliary switch drive board 29 and DS auxiliary switch assembly 28 is in mirror image relationship; Obviously, ES closing and opening first position signal conversion processes are completely the same as DS closing and opening processes except that the direction is opposite.

[0084] Brief description of the action mechanism of the first position signal of the three-position mechanism:

[0085] The three-position mechanism has three working positions, i.e. the isolating (DS) and grounding (ES) are in the open position, the isolating (DS) is in the closed position and the grounding (ES) is in the open position, and the grounding (ES) is in the closed position and the isolating (DS) is in the open position. Regardless of the working position reached by the mechanism, an accurate position signal should be sent out.

[0086] Taking the signal conversion process of the electrically operated isolating DS closing first position as an example, please refer to Figure 1 and Figure 6 After the mechanism receives the DS isolating closing instruction, the second motor 45 on the DS side drives the nut in the ball screw pair 6 to start the linear motion to the left. First, the nut of the ball screw pair 6 moves in the first long groove of the DS auxiliary switch driving plate 29, at this time, the DS auxiliary switch driving plate 29 is prohibited from moving, when the nut of the ball screw pair 6 moves to the transition section with an inclination angle of β, the nut of the ball screw pair 6 drives the DS auxiliary switch driving plate 29 to move upward until the nut of the ball screw pair 6 moves to the second long groove, the DS auxiliary switch driving plate 29 moves a distance upward and then stops moving.

[0087] At the same time, please refer to Figure 7 , Figure 8 , Figure 9 and Figure 10 The "U"-shaped groove opened on the DS auxiliary switch driving plate 29, the driving shaft sleeve 37 and the coaxial driving pin 38 act, and then drive the crank arm 34 to rotate an angle θ / 2. From the direction of the opening and closing indicator 36, the opening and closing indicator 36 first rotates counterclockwise by θ / 2. Obviously, please refer to Figure 10 During this process, from the direction of the opening and closing indicator 36, the opening and closing indicator 36 presents a "open" stable state, a transient transition process from "open" to "half open half closed", and a "half open half closed" stable state. As the nut of the ball screw pair 6 continues to move linearly to the left, obviously the DS auxiliary switch driving plate 29 remains stationary in the second long groove.

[0088] When the nut in the ball screw pair 6 moves to the transition section with the inclination angle of a, the DS auxiliary switch driving plate 29 moves upward again until the nut in the ball screw pair 6 moves to the third long groove, the DS auxiliary switch driving plate 29 moves a distance and stops moving again, the nut in the ball screw pair 6 continues to move leftwards linearly, obviously, the DS auxiliary switch driving plate 29 keeps still in the second long groove until the nut in the ball screw pair 6 moves to the transition section between the second long groove and the third long groove, the DS auxiliary switch driving plate 29 continues to move upward under the pushing action of the nut in the ball screw pair 6; at the same time, the "U"-shaped groove opened on the DS auxiliary switch driving plate 29, the driving shaft sleeve 37 and the coaxial driving pin 38 act, and then drive the crank arm 34 to rotate an angle of θ / 2, obviously, in this process, the opening-closing indication board 36 presents a "half open half close" stable state, a transient transition process from "half open half close" to "closed", and a stable state of "closed", and it needs to be noted that the state of the DS auxiliary switch 32 in the DS auxiliary switch assembly 28 changes at the end of the transition section between the second long groove and the third long groove, and the first position signal of the DS closed state is sent.

[0089] When the nut in the ball screw pair 6 moves to the third long groove of the DS auxiliary switch driving plate 29, the cam 5 has also reached the closed position before, obviously, the first position signal is sent after the body reaches the closed position, so the first position signal is sent at the time when the condition that the main wiring of the equipment is stable and the current is allowed to be sent is met. Therefore, it can be known that the DS electric operation opening process is the same as the DS closing process except that the movement direction is opposite, and the nut in the ball screw pair 6 moves to the first long groove, the DS auxiliary switch 32 resets, and the first position signal of the DS opening state is sent.

[0090] The ES electric operation closing and opening processes are completely the same as the DS closing and opening processes, and the difference is that the rotation direction of the two transient transition processes from "open" to "half open half close" and from "half open half close" to "closed" observed from the opening-closing indication board 36 is opposite to that of the DS.

[0091] Brief description of the action mechanism of the second position signal of the three-position mechanism:

[0092] As Figure 3 and Figure 5As shown, the mechanism is in the DS open and ES open position, the protruding profile with a width of a set on both sides of the rack plate 20, just so that the DS open position monitoring switch 9 and ES open position monitoring switch 14 are in the pressure state, the background control device will monitor the signal, and determine that the mechanism is in the DS open and ES open position. Still taking the electrically operated DS closing as an example, after the mechanism receives the DS closing instruction, the DS side second motor 45 of the mechanism drives the ball screw pair 6 to move linearly, thereby driving the cam 5 to rotate counterclockwise, the gear 41 connected with the cam 5 through the main shaft 40 six sides rotates counterclockwise, thereby driving the output gear shaft 2 meshing with the gear 41 to rotate clockwise, the first spur gear 19 connected with the output gear shaft 2 through the six sides also rotates clockwise, thereby driving the second spur gear 10 meshing therewith to rotate counterclockwise, at the same time, the pinion 17 connected with the second spur gear 10 through the key 26 on the shaft 24 also rotates counterclockwise, thereby driving the rack plate 20 meshing with the pinion 17 to move rightward.

[0093] In the process of closing the mechanism DS, first, the protruding profile set on the rack plate 20 is away from the position of the DS open position monitoring switch 9, so that the state of the DS open position monitoring switch 9 changes, at this time the background control system determines that the mechanism DS is in the half open and half closed position, until the mechanism reaches the DS closed position, the output gear shaft 2 of the mechanism stops rotating, at the same time, the rack plate 20 moves to the position where the protruding profile set thereon is just in the switching state of the DS closed position monitoring switch 11, the DS closed position monitoring switch 11 sends a closed position maintaining signal; Obviously, in this process, the states of the ES open position monitoring switch 14 and the ES closed position monitoring switch 18 are changed, and the background control system determines that the mechanism is in the DS closed position. Obviously, the DS electrically operated opening process is the same as the DS closing process except that the moving direction is opposite, and the mechanism moves to the DS open and ES open position, the DS open position monitoring switch 9 and the ES open position monitoring switch 14 send an open position maintaining signal.

[0094] Similarly, the ES electrically operated closing and opening processes are completely the same as the DS closing and opening processes except for the turning, the difference is that the rack plate 20 moves to the left, after the ES reaches the closing position, the ES closing position monitoring switch 18 sends a closing position maintaining signal, obviously, in this process, the states of the DS opening position monitoring switch 9 and the ES closing position monitoring switch 18 do not change, after the ES reaches the opening position, the mechanism is again in the DS opening and ES opening position. It can be seen that the operating mechanism of the embodiment can provide the first position signal sent by the auxiliary switch transmission chain after the switch reaches the stable through-flow position, and can also directly obtain the second position signal from the mechanism output gear shaft 2, both position signals are sent at the end of the stroke, which can meet the needs of the power grid company "double confirmation" function for two different source position signals of the three-position mechanism, and provides protection for safe operation of the equipment.

[0095] It is worth noting that the driving device in the embodiment also includes a first driving assembly and a second driving assembly, wherein the first driving assembly includes a first motor 42 and a first motor mounting plate, and the second driving assembly includes a second motor 45 and a second motor mounting plate, when driving the first position signal device and the second position signal device 3 through the transmission device, it is not limited to which driving assembly is used, it can be understood that, Figure 1 only for example.

[0096] In the second aspect, a kind of isolated grounding switch is provided, including switch body, switch body is installed with the three-position mechanism position signal operating mechanism as described above.Three-position mechanism position signal operating mechanism is closely integrated with switch body, can ensure the accuracy and reliability of position signal sending, reduces the equipment failure caused by signal transmission error or delay, improves the reliability of entire isolated grounding switch system.

[0097] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application and not to limit the scope of protection, although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: after reading the present application, the skilled in the art can still make various changes, modifications or equivalent replacements to the specific embodiments of the present application, but these changes, modifications or equivalent replacements are all within the scope of protection of the claims of the present application.

Claims

1. A three-position mechanism for operating position signals, characterized in that, include: A top plate (1) and a bottom plate (8), wherein a second position signal device (3) is provided on the top plate (1) and a first position signal device is provided on the bottom plate (8); The transmission device is connected at one end to the drive device and at the other end to the first position signal device and the second position signal device (3); After receiving the operation command, the operating mechanism drives the transmission device to move the first position signal device and the second position signal device (3) respectively, and performs dual signal confirmation. The transmission device includes a first transmission component and a second transmission component, and the first transmission component and the second transmission component are connected in a transmission manner. The second position signal device (3) includes a DS open position monitoring switch (9), a DS close position monitoring switch (11), an ES open position monitoring switch (14), an ES close position monitoring switch (18), and a rack plate (20). The DS open position monitoring switch (9) and the DS close position monitoring switch (11) are located at one end of the top plate (1), and the ES open position monitoring switch (14) and the ES close position monitoring switch (18) are located at the other end of the top plate (1). The rack plate (20) is located in the middle of the top plate (1), and the rack plate (20) is in contact with the DS open position monitoring switch (9), the DS close position monitoring switch (11), the ES open position monitoring switch (14) and the ES close position monitoring switch (18) around its perimeter. One end of the second transmission component is connected to the driving device, and the other end is connected to the rack plate (20); wherein, under the drive of the driving device, the second transmission component drives the rack plate (20) to move; The first position signal device includes a DS auxiliary switch assembly (28), a DS auxiliary switch driver board (29), an ES auxiliary switch driver board (30), and an ES auxiliary switch assembly (31). The DS auxiliary switch driver board (29) is disposed at one end of the base plate (8), and the ES auxiliary switch driver board (30) is disposed at the other end of the base plate (8). The DS auxiliary switch assembly (28) is connected to the DS auxiliary switch drive board (29), the ES auxiliary switch drive board (30) is connected to the ES auxiliary switch assembly (31), one end of the first transmission assembly is connected to the drive device, and the other end cooperates with the DS auxiliary switch drive board (29) and the ES auxiliary switch drive board (30); The DS auxiliary switch assembly (28) and the ES auxiliary switch assembly (31) are connected to an auxiliary switch mounting plate (33). The end of the auxiliary switch mounting plate (33) is provided with a crank arm (34) and a circuit breaker indicator (36). The end of the crank arm (34) is connected to a mounting nut (39). The end of the mounting nut (39) is provided with a drive pin (38). The drive pin (38) is provided with a bushing (37). The first transmission assembly includes a cam (5) and a ball screw pair (6), the cam (5) being connected to the ball screw pair (6) in a transmission manner, and the ball screw pair (6) being provided with a nut; The DS auxiliary switch driver board (29) and the ES auxiliary switch driver board (30) have the same structure, both being π-shaped. The horizontal ends of the DS auxiliary switch driver board (29) and the ES auxiliary switch driver board (30) are provided with long slots, and the nut is slidably connected to the long slots. The end of one of the vertical ends of the DS auxiliary switch driver board (29) and the ES auxiliary switch driver board (30) is bent and has a U-shaped groove, which cooperates with the drive pin (38).

2. The three-station mechanism position signal operating mechanism according to claim 1, characterized in that, The rack plate (20) has a U-shaped structure, and one side of its open end is provided with teeth, which mesh with the second transmission component; The rack plate (20) has a raised profile on its opposite outer side, one of which cooperates with the DS open position monitoring switch (9) and the DS close position monitoring switch (11), and the other raised profile cooperates with the ES open position monitoring switch (14) and the ES close position monitoring switch (18). The rack plate (20) has guide grooves on both ends of the raised contour. The top plate (1) is also provided with a mounting plate (22). One end of the second transmission component is connected to the mounting plate (22), and the other end cooperates with the guide groove to drive the rack plate (20) to move left and right.

3. The three-station position signal operating mechanism according to claim 2, characterized in that, The mounting plate (22) is provided with a shaft pin (16), and a guide sleeve (15) is provided on the outside of the shaft pin (16). The guide sleeve (15) abuts against the rack plate (20) and fixes the rack plate (20). The second transmission assembly includes a first spur gear (19), a second spur gear (10), a pinion (17), an output gear shaft (2), and a shaft (24). One end of the shaft (24) is hinged to the mounting plate (22) via a second bearing (25), and the other end of the shaft (24) is connected to the second spur gear (10) and the pinion (17). The output gear shaft (2) is connected to the first spur gear (19). The first spur gear (19) and the second spur gear (10) mesh, and the pinion (17) meshes with the teeth.

4. The three-station position signal operating mechanism according to claim 3, characterized in that, The diameters of the first spur gear (19) and the second spur gear (10) are equal.

5. The three-station position signal operating mechanism according to claim 3, characterized in that, The second spur gear (10) is hinged to the mounting plate (22) via the first bearing (23).

6. The three-station position signal operating mechanism according to claim 1, characterized in that, The nut is located in a long groove.

7. The three-station position signal operating mechanism according to claim 1, characterized in that, The long groove is composed of a first long groove, a second long groove, and a third long groove. The first long groove and the third long groove are inclined, while the second long groove is horizontal.

8. An isolating grounding switch, comprising a switch body, characterized in that, The switch body is equipped with a three-position mechanism position signal operating mechanism as described in any one of claims 1-7.

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