Mechanical interlocking device, high-voltage combination switch device and high-voltage GIS equipment

Abstract

The invention discloses a mechanical interlocking device, a high-voltage combined switch device and high-voltage GIS equipment, which are applied to the technical field of power equipment and are used for solving the problem of complex structure of a mechanical interlocking device between an isolating switch and a grounding switch in the prior art. The device specifically comprises a transmission mechanism and an interlocking mechanism. The transmission mechanism is respectively connected with the input shaft of the isolating switch and the interlocking mechanism; the interlocking mechanism is arranged above the input shaft of the grounding switch; when the grounding switch is in an opening position and the isolation switch is in a closing position, the transmission mechanism drives the interlocking mechanism to move to a first position to shield an input shaft of the grounding switch, and the grounding switch cannot be closed; when the grounding switch is at the closing position, the interlocking mechanism is limited at the second position, and the isolation switch cannot be closed, so that closing of the grounding switch is prohibited when the isolation switch is closed, closing of the isolation switch is prohibited when the grounding switch is closed, and the mechanical interlocking device is simple in structure and easy to install and debug.

Description

Technical Field

[0001] The present application relates to the technical field of electric power equipment, and in particular to a mechanical interlocking device, a high-voltage combination switch device and a high-voltage GIS device. Background Art

[0002] High-voltage GIS (Gas Insulated Switchgea, gas-insulated metal-enclosed switch) equipment is an important part of the power system, mainly composed of circuit breakers, disconnectors, grounding switches, mutual inductors, lightning arresters, bushings and other high-voltage electrical components. Among them, the disconnector and the grounding switch need to meet the disconnector and the grounding switch cannot be closed at the same time, that is, the grounding switch is not allowed to be closed when the disconnector is closed, and the disconnector is not allowed to be closed when the grounding switch is closed.

[0003] At present, an interlocking mechanism is provided between the grounding switch and the isolating switch to prevent the isolating switch and the grounding switch from being closed at the same time. However, the structure of the mechanical interlocking device is relatively complex, which makes the installation and commissioning of the isolating switch and the grounding switch extremely inconvenient. Summary of the invention

[0004] The embodiments of the present application provide a mechanical interlocking device, a high-voltage combination switch device and a high-voltage GIS device, so as to solve the problem of complex structure of the mechanical interlocking device between the isolating switch and the grounding switch existing in the prior art.

[0005] The technical solutions provided by the embodiments of this application are as follows:

[0006] On the one hand, an embodiment of the present application provides a mechanical interlocking device for use between an isolating switch and an earthing switch, the mechanical interlocking device comprising: a transmission mechanism and an interlocking mechanism;

[0007] One end of the transmission mechanism is connected to the input shaft of the disconnector, and the other end of the transmission mechanism is connected to the interlocking mechanism; the interlocking mechanism is arranged above the input shaft of the grounding switch;

[0008] When the grounding switch is in the open position, the transmission mechanism is used to drive the interlock mechanism to move to the first position when the isolating switch is in the closed position, and the interlock mechanism blocks the input shaft of the grounding switch so that the grounding switch cannot be closed; when the isolating switch is in the open position, the transmission mechanism drives the interlock mechanism to move to the second position so that the interlock mechanism exposes the input shaft of the grounding switch, so that the grounding switch is closed;

[0009] When the grounding switch is in the closing position, the interlocking mechanism is used to limit the position to the second position so that the disconnector cannot be closed.

[0010] In one possible implementation, the interlocking mechanism includes: a horizontal plate assembly and a support assembly;

[0011] The support assembly is fixed above the input shaft of the grounding switch; the support assembly provides support for the horizontal plate assembly, and the horizontal plate assembly is slidably connected to the support assembly; one end of the horizontal plate assembly is rotatably connected to the transmission mechanism, and the horizontal plate assembly slides above the support assembly under the drive of the transmission mechanism, and when the grounding switch is in the closed position, the horizontal plate assembly interferes with the input shaft of the grounding switch.

[0012] In a possible implementation, the horizontal plate assembly includes: a sliding plate and an interlocking block;

[0013] The sliding plate is provided with an operation hole and two parallel long slots; the sliding plate is slidably connected with the supporting assembly through the two long slots;

[0014] The interlocking block is fixedly arranged on the surface of the sliding plate facing the supporting assembly. The interlocking block is arranged on one side of the operating hole. When the input shaft of the grounding switch rotates to the closing position, the interlocking block interferes with the input shaft of the grounding switch.

[0015] In a possible implementation, the transmission mechanism includes: a crank arm and a transmission connecting plate;

[0016] The crank arm is fixedly connected to the input shaft of the isolating switch, one end of the transmission connecting plate is rotationally connected to the crank arm through a pin shaft, and the other end of the transmission connecting plate is rotationally connected to the sliding plate through a pin shaft.

[0017] In a possible implementation, the support assembly includes: at least two guide shafts and a fixing seat;

[0018] The guide shaft is provided with a corresponding long groove on the sliding plate, one end of the guide shaft is fixedly provided on the fixing seat, and the other end of the guide shaft is provided with a fixing piece; an annular groove is provided on the guide shaft, and the sliding plate slides along the cylindrical surface of the annular groove; at least two guide shafts are symmetrically provided;

[0019] A through hole is opened in the center of the fixing seat, and the fixing seat passes through the input shaft of the grounding switch and is fixedly arranged above the grounding switch.

[0020] In a possible implementation, the mechanical interlocking device further includes: a dynamic padlock plate, a static opening padlock plate, and a static closing padlock plate;

[0021] The dynamic padlock plate penetrates and is fixedly arranged on the input shaft of the earthing switch, and the dynamic padlock plate rotates with the input shaft of the earthing switch; the static opening padlock plate is fixedly arranged at the corresponding position on the fixed seat when the dynamic padlock plate rotates to the opening position along with the input shaft of the earthing switch; the static closing padlock plate is fixedly arranged at the corresponding position on the fixed seat when the dynamic padlock plate rotates to the closing position along with the input shaft of the earthing switch;

[0022] The dynamic padlock plate, the static opening padlock plate and the static closing padlock plate are provided with padlock holes; when the dynamic padlock plate rotates to the closing position along with the input shaft of the earthing switch, the padlock hole on the dynamic padlock plate overlaps with the padlock hole on the static closing padlock plate; when the dynamic padlock plate rotates to the opening position along with the input shaft of the earthing switch, the padlock hole on the dynamic padlock plate overlaps with the padlock hole on the static opening padlock plate.

[0023] In one possible implementation, the mechanical interlocking device further includes: a plate and a micro switch;

[0024] The micro switch is fixed on the fixing seat through a plate, and the micro switch is arranged on one side of the dynamic padlock plate; the micro switch is connected in series in the electrical circuit of the driving mechanism of the isolating switch; when the dynamic padlock plate rotates to the opening position along with the input shaft of the grounding switch, the dynamic padlock plate squeezes the contact pressure wheel of the micro switch.

[0025] In a possible implementation, the mechanical interlocking device further includes: a pointer, an opening indicator sign, and a closing indicator sign;

[0026] The fixed part of the pointer is fixedly arranged on the surface of the dynamic padlock plate, the indicating part of the pointer is perpendicular to the fixed part of the pointer, and the indicating part of the pointer points to the side wall of the fixing seat;

[0027] The opening indicator plate is fixed on the side wall of the fixing seat and at a position corresponding to the static opening padlock plate;

[0028] The closing indicator plate is fixed to the side wall of the fixing seat and at a position corresponding to the static closing padlock plate.

[0029] On the other hand, an embodiment of the present application provides a high-voltage combined switch device, including: an isolating switch, a driving mechanism of the isolating switch, a grounding switch, a tank assembly, and the above-mentioned mechanical interlocking device provided in the embodiment of the present application;

[0030] The isolating switch and the earthing switch are arranged inside the tank assembly, and the driving mechanism and the mechanical interlocking device of the isolating switch are arranged outside the tank assembly; one end of the mechanical interlocking device is connected to the input shaft of the isolating switch, and the other end of the mechanical interlocking device is arranged above the input shaft of the earthing switch; the driving mechanism of the isolating switch is drivingly connected to the input shaft of the isolating switch.

[0031] On the other hand, an embodiment of the present application provides a high-voltage GIS device, including: at least one of the above-mentioned high-voltage combined switch devices provided in an embodiment of the present application; each high-voltage combined switch device is connected to a corresponding busbar.

[0032] The beneficial effects of the embodiments of the present application are as follows:

[0033] In the embodiment of the present application, a transmission mechanism is arranged between the input shaft of the isolating switch and the interlocking mechanism, and the interlocking mechanism is arranged above the input shaft of the grounding switch. When the grounding switch is in the open position and the isolating switch is in the closed position, the interlocking mechanism is driven to move to the first position so that the interlocking mechanism blocks the input shaft of the grounding switch, thereby prohibiting the grounding switch from being closed when the isolating switch is closed. When the grounding switch is in the closed position, the interlocking mechanism is limited to the second position, so that the transmission mechanism and the input shaft of the isolating switch connected to the transmission mechanism cannot move, thereby prohibiting the isolating switch from being closed when the grounding switch is closed. In addition, the mechanical interlocking device is composed of only the interlocking mechanism and the transmission mechanism, has a simple structure, and is easy to install and debug.

[0034] Other features and advantages of the present application will be described in the subsequent description, and in part, will become apparent from the description, or will be understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0036] Figure 1 A three-dimensional schematic diagram of a high-voltage combination switch in an embodiment of the present application;

[0037] Figure 2 Schematic diagram of the mechanical interlocking device when the isolating switch is opened in the embodiment of the present application;

[0038] Figure 3 Schematic diagram of the mechanical interlocking device when the isolating switch is closed in the embodiment of the present application;

[0039] Figure 4 A three-dimensional diagram of the interlocking mechanism of the mechanical interlocking device when the disconnector is opened in the embodiment of the present application;

[0040] Figure 5 It is a partial diagram of the interlocking mechanism of the mechanical interlocking device when the disconnector is opened in the embodiment of the present application;

[0041] Figure 6 A top view of the interlocking mechanism of the mechanical interlocking device when the disconnector is opened in the embodiment of the present application;

[0042] Figure 7 A three-dimensional diagram of the interlocking mechanism of the mechanical interlocking device when the disconnector is closed in the embodiment of the present application;

[0043] Figure 8It is a partial diagram of the interlocking mechanism of the mechanical interlocking device when the disconnector is closed in the embodiment of the present application;

[0044] Fig. 9 It is a top view of the interlocking mechanism of the mechanical interlocking device when the disconnector is closed in the embodiment of the present application.

[0045] Illustration: 1-mechanical interlocking device; 2-isolating switch; 21-input shaft of isolating switch; 3-earthing switch; 31-input shaft of earthing switch; 311-hexagonal hole; 312-first plane; 313-second plane; 4-transmission mechanism; 41-crank arm; 42-transmission connecting plate; 5-interlocking mechanism; 51-horizontal plate assembly; 52-support assembly; 53-sliding plate; 531-long slot; 532-operating hole; 533-fixing hole; 54-interlocking block; 541-left plane; 55-guide shaft; 551-annular groove; 56-fixing seat; 6-dynamic padlock plate; 60-locking plate curved surface; 61-static opening padlock plate; 62-static closing padlock plate; 63-plate; 64-micro switch; 641-contact pressure wheel; 65-pointer; 66-opening indicator plate; 67-closing indicator plate; 7-driving mechanism of isolating switch; 8-tank assembly. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and beneficial effects of this application clearer, the technical solution in the embodiment of this application will be clearly and completely described below in conjunction with the drawings in the embodiment of this application. Obviously, the described embodiment is only a part of the embodiment of this application, not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] At present, the disconnector and grounding switch in high-voltage GIS equipment need to meet the requirement that the disconnector and grounding switch cannot be closed at the same time, that is, the grounding switch is not allowed to be closed when the disconnector is closed, and the disconnector is not allowed to be closed when the grounding switch is closed. An interlocking mechanism is set between the grounding switch and the disconnector to prevent the disconnector and grounding switch from being closed at the same time, but the structure of the mechanical interlocking device is relatively complex, which makes the installation and commissioning of the disconnector and grounding switch extremely inconvenient.

[0048] To this end, in an embodiment of the present application, a transmission mechanism is arranged between the input shaft of the isolating switch and the interlocking mechanism, and the interlocking mechanism is arranged above the input shaft of the grounding switch. When the grounding switch is in the open position and the isolating switch is in the closed position, the interlocking mechanism is driven to move to the first position so that the interlocking mechanism blocks the input shaft of the grounding switch, thereby prohibiting the grounding switch from being closed when the isolating switch is closed. When the grounding switch is in the closed position, the interlocking mechanism is limited to the second position, so that the transmission mechanism and the input shaft of the isolating switch connected to the transmission mechanism cannot move, thereby prohibiting the isolating switch from being closed when the grounding switch is closed. In addition, the mechanical interlocking device is composed of only the interlocking mechanism and the transmission mechanism, has a simple structure, and is easy to install and debug.

[0049] After introducing the application scenarios and design concepts of the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described in detail below.

[0050] The present application embodiment provides a mechanical interlocking device 1 for use between an isolating switch 2 and a grounding switch 3. Figure 1-Figure 3 As shown, the mechanical interlocking device 1 provided in the embodiment of the present application at least comprises: a transmission mechanism 4 and an interlocking mechanism 5;

[0051] One end of the transmission mechanism 4 is connected to the input shaft 21 of the disconnector, and the other end of the transmission mechanism 4 is connected to the interlocking mechanism 5; the interlocking mechanism 5 is arranged above the input shaft 31 of the grounding switch;

[0052] When the grounding switch 3 is in the open position, the transmission mechanism 4 is used to drive the interlocking mechanism 5 to move to the first position when the isolating switch 2 is in the closed position, and the interlocking mechanism 5 blocks the input shaft 31 of the grounding switch, so that the grounding switch 3 cannot be closed; when the isolating switch 2 is in the open position, the transmission mechanism 4 drives the interlocking mechanism 5 to move to the second position, so that the interlocking mechanism 5 exposes the input shaft 31 of the grounding switch, so that the grounding switch 3 is closed;

[0053] When the grounding switch 3 is in the closing position, the interlocking mechanism 5 is used to be limited to the second position so that the disconnector 2 cannot be closed.

[0054] exist Figure 1-Figure 3In the mechanical interlocking device 1 shown, one end of the transmission mechanism 4 is fixedly connected to the input shaft 21 of the disconnector, and the other end is connected to the interlocking mechanism 5. When the drive mechanism 7 of the disconnector drives the input shaft 21 of the disconnector to rotate so that the state of the disconnector 2 changes, the transmission mechanism 4 can respond quickly and transmit the torque of the input shaft 21 of the disconnector to the interlocking mechanism 5, so as to drive the interlocking mechanism 5 to move to the first position or the second position. The first position refers to the position corresponding to the input shaft 31 of the grounding switch blocked by the interlocking mechanism 5; the second position refers to the position corresponding to the input shaft 31 of the grounding switch not blocked by the interlocking mechanism 5. Specifically, when the isolating switch 2 is in the closed position, the transmission mechanism 4 will drive the interlocking mechanism 5 to move to the first position. At this time, the interlocking mechanism 5 will block the input shaft 31 of the grounding switch, and the operating handle cannot be used to operate the input shaft of the grounding switch 3 to rotate to the closed position, thereby preventing the closing operation of the grounding switch 3. On the contrary, when the isolating switch 2 is in the open position, the transmission mechanism 4 will drive the interlocking mechanism 5 to move to the second position. At this time, the interlocking mechanism 5 no longer blocks the input shaft 31 of the grounding switch, and the operating handle can be used to operate the input shaft of the grounding switch 3 to rotate to the closed position, allowing the grounding switch 3 to perform the closing operation, thereby realizing that the grounding switch 3 is not allowed to be closed when the isolating switch 2 is closed. When the grounding switch 3 is in the open position, the interlocking mechanism 5 can be driven by the transmission mechanism 4 to move to the first position or the second position; and when the grounding switch 3 is in the closed position, it interferes with the input shaft 31 of the grounding switch and is limited to the second position by the input shaft 31 of the grounding switch. When the grounding switch 3 itself is in the open position, the interlocking mechanism 5 can be driven by the transmission mechanism 4 to move to the first position or the second position, depending on the state of the isolating switch 2. However, when the grounding switch 3 is in the closed position, the interlocking mechanism 5 interferes with the input shaft 31 of the grounding switch and is limited to the second position by the input shaft 31 of the grounding switch. At this time, since the interlocking mechanism 5 is limited, the transmission mechanism 4 and the input shaft 21 of the isolating switch connected to the transmission mechanism 4 cannot move, so that the isolating switch 2 is not allowed to be closed when the grounding switch 3 is closed.

[0055] In specific implementation, the interlocking mechanism 5 in the mechanical interlocking device 1 has a variety of structures to achieve its function, see Figure 2 and Figure 3 As shown, the interlocking mechanism 5 includes: a horizontal plate assembly 51 and a support assembly 52;

[0056] The support assembly 52 is fixed above the input shaft 31 of the grounding switch; the support assembly 52 provides support for the horizontal plate assembly 51, and the horizontal plate assembly 51 is slidably connected to the support assembly 52; one end of the horizontal plate assembly 51 is rotatably connected to the transmission mechanism 4, and the horizontal plate assembly 51 slides above the support assembly 52 under the drive of the transmission mechanism 4. When the grounding switch 3 is in the closed position, the horizontal plate assembly 51 interferes with the input shaft 31 of the grounding switch.

[0057] exist Figure 2 and Figure 3 In the mechanical interlocking device 1 shown, the support assembly 52 is fixedly mounted on the outer coal of the air chamber where the grounding switch 3 is located and fixed above the input shaft. The support assembly 52 can be made of solid metal material and designed into a U-shaped or frame-type structure to provide a stable support platform for the horizontal plate assembly 51. A sliding groove or a sliding track is provided on the horizontal plate assembly 51 to provide a precise sliding path for the horizontal plate assembly 51. When the disconnector 2 is closed, driven by the transmission mechanism 4, the horizontal plate assembly 51 slides on the support assembly 52 to the first position, and the horizontal plate assembly 51 blocks the input shaft 31 of the grounding switch, preventing the closing operation of the grounding switch 3; when the disconnector 2 is opened, the horizontal plate assembly 51 slides on the support assembly 52 to the second position, and the horizontal plate assembly 51 does not block the input shaft 31 of the grounding switch, and the grounding switch 3 can be closed. When the grounding switch 3 is closed, the input shaft 31 of the grounding switch is rotated to the closed position. The input shaft in the closed position interferes with the horizontal plate assembly 51, and the horizontal plate assembly 51 cannot slide, resulting in the transmission mechanism 4 and the input shaft 21 of the disconnector connected to the transmission mechanism 4 being unable to move, so that the disconnector 2 cannot be closed. When the grounding switch 3 is opened, the input shaft 31 of the grounding switch is rotated to the open position. The input shaft in the closed position does not interfere with the horizontal plate assembly 51, and the horizontal plate assembly 51 can slide, so the disconnector 2 can be closed or opened.

[0058] In specific implementation, the horizontal plate assembly 51 in the mechanical interlocking device 1 has a variety of structures to achieve its function, see Figure 4-Figure 6 As shown, the horizontal plate assembly 51 includes: a sliding plate 53 and an interlocking block 54;

[0059] The sliding plate 53 is provided with an operation hole 532 and two parallel long slots 531 ; the sliding plate 53 is slidably connected with the supporting assembly 52 through the two long slots;

[0060] The interlocking block 54 is fixedly disposed on the surface of the sliding plate 53 facing the supporting assembly 52 . The interlocking block 54 is disposed on one side of the operating hole 532 . When the input shaft 31 of the grounding switch rotates to the closing position, the interlocking block 54 interferes with the input shaft 31 of the grounding switch.

[0061] exist Figure 4-Figure 6In the mechanical interlocking device 1 shown, the long groove of the sliding plate 53 extends along the length direction of the sliding plate 53, and the sliding plate 53 is slidably connected to the support assembly 52 through two long grooves, and the two long grooves provide sliding tracks to enable the sliding plate 53 to slide between the first position and the second position on the support assembly 52. ​​The operating plate 53 can be provided with a fixing hole 533 for fixing with the transmission mechanism. When the sliding plate 53 moves to the first position, the operating hole on the sliding plate 53 is used to leak the operating end of the input shaft 31 of the grounding switch, and the diameter of the operating hole is larger than the diameter of the input shaft 31 of the grounding switch. When the sliding plate 53 moves to the second position, other positions on the sliding plate 53 except the operating hole and the two parallel long grooves can completely block the operating end of the input shaft 31 of the grounding switch. The interlocking block 54 is a block-shaped or convex structure, fixedly arranged on the side surface of the sliding plate 53 facing the support assembly 52, and located on one side of the operating hole. The cross section of the input shaft 31 of the grounding switch is circular, and the operating end of the grounding switch 3 is partially cut so that the input shaft 31 of the grounding switch is rotated to the closed position to physically interfere with the interlocking block 54 to prevent the sliding plate 53 from sliding; the input shaft 31 of the grounding switch is rotated to the open position without physically interfering with the interlocking block 54 to allow the sliding plate 53 to slide.

[0062] In specific implementation, the support assembly 52 in the mechanical interlocking device 1 has a variety of structures to achieve its function, see Figure 4-Figure 9 As shown, the support assembly 52 includes: at least two guide shafts 55 and a fixing seat 56;

[0063] The guide shaft 55 passes through the corresponding long groove on the sliding plate 53, one end of the guide shaft 55 is fixedly set on the fixing seat 56, and the other end of the guide shaft 55 is provided with a fixing piece; an annular groove is provided on the guide shaft 55, and the sliding plate 53 slides along the cylindrical surface of the annular groove 551; at least two guide shafts 55 are symmetrically arranged;

[0064] A through hole is formed in the center of the fixing seat 56 . The fixing seat 56 passes through the input shaft 31 of the grounding switch and is fixedly disposed above the grounding switch 3 .

[0065] exist Figure 4-Figure 9In the mechanical interlocking device 1 shown, one end of the guide shaft 55 is fixed to the fixed seat 56 by threaded connection, welding or other fastening methods, and the other end is provided with a fixing member (such as a nut, an end cover, etc.) to prevent the sliding plate 53 from falling out from the other end. In order to ensure the stability and balance of the sliding plate 53 during the sliding process, at least two guide shafts 55 should be symmetrically arranged, and the installation angle and height and other parameters of at least two guide shafts 55 should be consistent. An annular groove 551 is provided on the guide shaft 55, and the cylindrical surface of the annular groove 551 serves as a reference surface for the sliding of the sliding plate 53, which helps to reduce the sliding resistance. A through hole is provided in the center of the fixed seat 56, and the diameter of the through hole is larger than the diameter of the input shaft of the grounding switch 3, so that the fixed seat 56 can pass through the input shaft and be fixed above the grounding switch 3.

[0066] In specific implementation, the transmission mechanism 4 in the mechanical interlocking device 1 has a variety of structures to achieve its function, see Figure 2-Figure 4 As shown, the transmission mechanism 4 includes: a crank arm 41 and a transmission connecting plate 42;

[0067] The crank arm 41 is fixedly connected to the input shaft 21 of the isolating switch, one end of the transmission connecting plate 42 is rotationally connected to the crank arm 41 through a pin shaft, and the other end of the transmission connecting plate 42 is rotationally connected to the sliding plate 53 through a pin shaft.

[0068] exist Figure 2-Figure 4 In the mechanical interlocking device 1 shown, the crank arm 41 is designed to be bent, one end of which is provided with a connection hole or flange matching the input shaft of the disconnector 2, and is fixedly connected to it by bolts, pins or other fastening methods, and the other end of the crank arm 41 is provided with a pin hole connected to the transmission connecting plate 42. The transmission connecting plate 42 is a flat plate or a nearly flat plate structure, and is provided with two pin holes, which are respectively used to be rotatably connected with the crank arm 41 and the sliding plate 53. The position and angle of the pin holes are designed according to actual needs to ensure that the transmission connecting plate 42 can drive the sliding plate 53 to slide between the first position and the second position during the rotation process. The crank arm 41 converts the rotational motion of the input shaft 21 of the disconnector into the motion of the transmission connecting plate 42. The transmission connecting plate 42, as an intermediate transmission member in the transmission mechanism 4, transmits the motion of the crank arm 41 to the sliding plate 53, thereby realizing the linkage between the input shaft 21 of the disconnector and the sliding plate 53.

[0069] In one possible implementation, see Figure 5-Figure 8 As shown, the mechanical interlocking device 1 further includes: a dynamic padlock plate 6, a static opening padlock plate 61 and a static closing padlock plate 62;

[0070] The dynamic padlock plate 6 penetrates and is fixedly arranged on the input shaft 31 of the grounding switch, and the dynamic padlock plate 6 rotates with the input shaft 31 of the grounding switch; the static opening padlock plate 61 is fixedly arranged at the corresponding position on the fixed seat 56 when the dynamic padlock plate 6 rotates to the opening position with the input shaft 31 of the grounding switch; the static closing padlock plate 62 is fixedly arranged at the corresponding position on the fixed seat 56 when the dynamic padlock plate 6 rotates to the closing position with the input shaft 31 of the grounding switch;

[0071] Padlock holes are provided on the dynamic padlock plate 6, the static opening padlock plate 61 and the static closing padlock plate 62; when the dynamic padlock plate 6 rotates to the closing position along with the input shaft 31 of the grounding switch, the padlock hole on the dynamic padlock plate 6 overlaps with the padlock hole on the static closing padlock plate 62; when the dynamic padlock plate 6 rotates to the opening position along with the input shaft 31 of the grounding switch, the padlock hole on the dynamic padlock plate 6 overlaps with the padlock hole on the static opening padlock plate 61.

[0072] exist Figure 5-Figure 8 In the mechanical interlocking device 1 shown, the dynamic padlock plate 6 is designed to be long strip or plate-shaped, and is provided with a through hole matching the input shaft 31 of the grounding switch. It is fixed to the input shaft by a keyway, a pin or other fastening means, and the dynamic padlock plate 6 is also provided with a padlock hole for installing a padlock. The dynamic padlock plate 6 rotates with the rotation of the input shaft of the grounding switch 3. When the input shaft 31 of the grounding switch is in the closing position, the dynamic padlock plate 6 cooperates with the static closing padlock plate 62, and the padlock holes of the two overlap, and the padlock is locked by the padlock to prevent the switch from opening by mistake; when the input shaft 31 of the grounding switch is in the opening position, the dynamic padlock plate 6 cooperates with the static opening padlock plate 61, and the padlock holes of the two overlap, and the padlock is locked by the padlock to prevent the switch from closing by mistake.

[0073] In one possible implementation, see Figure 5-Figure 8 As shown, the mechanical interlocking device 1 further includes: a plate 63 and a micro switch 64;

[0074] The micro switch 64 is fixed to the fixing seat 56 through the plate 63, and the micro switch 64 is arranged on one side of the dynamic padlock plate 6; the micro switch 64 is connected in series in the electrical circuit of the driving mechanism of the isolating switch; when the dynamic padlock plate 6 rotates to the opening position along with the input shaft 31 of the grounding switch, the dynamic padlock plate 6 squeezes the contact pressure wheel 641 of the micro switch 64.

[0075] exist Figure 5-Figure 8In the mechanical interlocking device 1 shown, the lock plate curved surface 60 on one side of the dynamic padlock plate 6 is designed to be able to contact and squeeze the contact pressure wheel 641 of the micro switch 64. The contact pressure wheel 641 of the micro switch 64 faces the direction in which the lock plate curved surface 60 of the dynamic padlock plate 6 may contact. The micro switch 64 is connected in series in the electrical circuit of the drive mechanism of the disconnector, and the contact of the micro switch 64 works in the normally closed state by default. When the contact pressure wheel 641 of the micro switch 64 is squeezed, the contact state of the micro switch 64 changes to the normally open state, thereby cutting off or connecting the electrical circuit. By introducing the linkage between the micro switch 64 and the dynamic padlock plate 6, the control of the electrical interlock of the drive mechanism of the disconnector is realized, ensuring that the disconnector 2 cannot be misoperated when the grounding switch 3 is in the open position, thereby improving the safety of the power system.

[0076] In one possible implementation, see Figure 5 As shown, the mechanical interlocking device 1 further includes: a pointer 65, an opening indicator 66 and a closing indicator 67;

[0077] The fixed portion of the pointer 65 is fixedly arranged on the surface of the dynamic padlock plate 6, the indicating portion of the pointer 65 is perpendicular to the fixed portion of the pointer 65, and the indicating portion of the pointer 65 points to the side wall of the fixing seat 56;

[0078] The opening indicator plate 66 is fixed to the side wall of the fixing seat 56 and at a position corresponding to the static opening padlock plate 61;

[0079] The closing indicator plate 67 is fixed to the side wall of the fixing seat 56 and at a position corresponding to the static closing padlock plate 62 .

[0080] exist Figure 5In the mechanical interlocking device 1 shown, the pointer 65 is composed of a fixed part and an indicating part. The fixed part is fixed to the surface of the dynamic padlock plate 6 by screws, welding or other fastening methods; the indicating part is perpendicular to the fixed part and is usually designed to be a slender rod or arrow shape to facilitate observation of its direction. The opening indicator 66 is fixed to the side wall of the fixed seat 56 and is located at a position corresponding to the static opening padlock plate 61. There should be clear "opening" words or symbols on the indicator for easy identification. The closing indicator 67 is fixed to the side wall of the fixed seat 56 and is located at a position corresponding to the static closing padlock plate 62. There should be clear "closing" words or symbols on the indicator. As the movable padlock plate 6 rotates, the indicator portion of the pointer 65 will point to different positions. Since the movable padlock plate 6 rotates as the input shaft of the grounding switch 3 rotates, when the input shaft 31 of the grounding switch is in the closed position, the indicator portion of the pointer 65 will point to the closed indicator plate 67, and when the input shaft 31 of the grounding switch is in the open position, the indicator portion of the pointer 65 will point to the open indicator plate 66. By introducing the pointer 65, the open indicator plate 66 and the closed indicator plate 67, the current state (open or closed) of the grounding switch 3 is intuitively displayed through the coordination of the pointer 65 and the indicator plate, thereby improving the recognition efficiency of the operator and reducing the possibility of misoperation.

[0081] Next, Figure 4-Figure 9 Taking the mechanical interlocking device 1 shown as an example, the working process of the mechanical interlocking device 1 is described in detail.

[0082] When the disconnector 2 is closed, the associated crank arm 41, pin shaft, transmission connecting plate 42, under the action of the rotation of the input shaft 21 of the disconnector, the horizontal plate assembly 51 moves to the left and reaches the first position, so that the hole on the sliding plate 53 is away from the input shaft of the grounding switch 3. Looking down from the upper surface of the sliding plate 53, the sliding plate 53 completely blocks the hexagonal hole 311 of the input shaft 31 of the grounding switch. At this time, the hexagonal operating handle cannot be inserted into the hexagonal hole 311 of the input shaft of the grounding switch 3, thereby avoiding the live grounding switch from being closed.

[0083] When the disconnector 2 is opened, the associated crank arm 41, pin shaft, transmission connecting plate 42 rotate under the action of the input shaft 21 of the disconnector, and the horizontal plate assembly 51 moves to the right and reaches the second position. The center of the operating hole 532 on the sliding plate 53 coincides with the center of the input shaft 31 of the grounding switch. At this time, the hexagonal operating handle can be inserted into the hexagonal hole 311 of the input shaft of the grounding switch 3 to open or close the grounding switch 3. After the operation is completed, the padlock can be locked through the padlock hole as needed.

[0084] When the grounding switch 3 is in the open position, a plane of the input shaft 31 of the grounding switch is in a horizontal position, and there is a gap between the interlocking block 54 on the horizontal plate assembly 51 and the plane of the input shaft 31 of the grounding switch. The driving mechanism of the disconnector drives the input shaft to rotate clockwise to perform the closing operation. Under the action of the input shaft, the crank arm 41, the pin shaft, the transmission connecting plate 42, and the sliding plate 53, the horizontal plate assembly 51 is driven to move to the left to the first position, and the double-break disconnector 2 reaches the closing position. At this time, the sliding plate 53 completely blocks the hexagonal hole 311 of the input shaft, and the hexagonal operating handle cannot be inserted into the hexagonal hole 311 of the input shaft 31 of the grounding switch, and the grounding switch 3 cannot be closed, thereby avoiding the live grounding knife.

[0085] When the grounding switch 3 is in the closing position, that is, the input shaft of the grounding switch 3 rotates counterclockwise by a preset angle, the first plane 312 and the second plane 313 of the input shaft of the grounding switch 3 rotate from a horizontal position to a vertical position, and the left plane 541 of the interlocking block 54 on the horizontal plate assembly 51 partially interferes with the second plane 313; at this time, in order to insert the manual operating handle into the manual operating hole to perform the closing operation on the driving mechanism of the disconnector, the driving input shaft will rotate clockwise, and under the action of the input shaft, the crank arm 41, the pin shaft, the transmission connecting plate 42, and the sliding plate 53, the horizontal plate assembly 51 will be in the second position. However, due to the partial interference between the left plane 541 of the interlocking block 54 and the second plane 313, the horizontal plate assembly 51 will not be able to move to the second position, that is, the closing operation of the disconnector 2 cannot be performed by inserting the manual operating handle. At the same time, the curved surface of the movable padlock plate 6 fixed on the input shaft 31 of the grounding switch squeezes the contact pressure wheel of the micro switch 64, causing the normally closed contact of the micro switch 64 to become a normally open contact, and the electrical circuit of the drive mechanism of the isolating switch is open, so that the drive mechanism cannot drive the isolating switch 2 to perform an electric closing operation, thereby avoiding the live closing of the isolating switch after the grounding switch is closed.

[0086] Based on the above embodiments, the present application provides a high voltage combination switch device. Figure 1 As shown, the high-voltage combined switch device provided in the embodiment of the present application at least includes: an isolating switch 2, a driving mechanism 7 of the isolating switch, a grounding switch 3, a tank assembly 8 and a mechanical interlocking device 1 provided in the embodiment of the present application;

[0087] The isolating switch 2 and the earthing switch 3 are arranged inside the tank assembly 8, and the driving mechanism 7 and the mechanical interlocking device 1 of the isolating switch are arranged outside the tank assembly 8; one end of the mechanical interlocking device 1 is connected to the input shaft 21 of the isolating switch, and the other end of the mechanical interlocking device 1 is arranged above the input shaft 31 of the earthing switch; the driving mechanism 7 of the isolating switch is transmission-connected to the input shaft 21 of the isolating switch.

[0088] Based on the above embodiments, an embodiment of the present application provides a high-voltage GIS device, and the high-voltage GIS device provided by the embodiment of the present application at least includes: at least one high-voltage combination switch device provided by an embodiment of the present application; each high-voltage combination switch device is connected to a corresponding busbar.

[0089] It should be noted that, although several units or subunits of the device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided into multiple units to be embodied.

[0090] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0091] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A mechanical interlocking device, characterized in that: Used between the isolating switch and the grounding switch, the mechanical interlocking device comprises: a transmission mechanism and an interlocking mechanism; One end of the transmission mechanism is connected to the input shaft of the disconnector, and the other end of the transmission mechanism is connected to the interlocking mechanism; the interlocking mechanism is arranged above the input shaft of the grounding switch; When the grounding switch is in the open position, the transmission mechanism is used to drive the interlock mechanism to move to the first position when the isolating switch is in the closed position, and the interlock mechanism blocks the input shaft of the grounding switch so that the grounding switch cannot be closed; when the isolating switch is in the open position, the transmission mechanism drives the interlock mechanism to move to the second position so that the interlock mechanism exposes the input shaft of the grounding switch so that the grounding switch is closed; When the grounding switch is in the closing position, the interlocking mechanism is used to be limited to the second position so that the isolating switch cannot be closed.

2. The mechanical interlocking device according to claim 1, characterized in that: The interlocking mechanism comprises: a horizontal plate assembly and a support assembly; The support assembly is fixed above the input shaft of the grounding switch; the support assembly provides support for the horizontal plate assembly, and the horizontal plate assembly is slidably connected to the support assembly; one end of the horizontal plate assembly is rotatably connected to the transmission mechanism, and the horizontal plate assembly slides above the support assembly driven by the transmission mechanism, and the horizontal plate assembly interferes with the input shaft of the grounding switch when the grounding switch is in the closed position.

3. The mechanical interlocking device according to claim 2, characterized in that: The horizontal plate assembly comprises: a sliding plate and an interlocking block; The sliding plate is provided with an operation hole and two parallel long slots; the sliding plate is slidably connected with the supporting assembly through the two long slots; The interlocking block is fixedly arranged on the surface of the sliding plate facing the supporting assembly, and the interlocking block is arranged on one side of the operating hole. When the input shaft of the grounding switch rotates to the closing position, the interlocking block interferes with the input shaft of the grounding switch.

4. The mechanical interlocking device according to claim 3, characterized in that: The transmission mechanism comprises: a crank arm and a transmission connecting plate; The crank arm is fixedly connected to the input shaft of the isolating switch, one end of the transmission connecting plate is rotationally connected to the crank arm through a pin shaft, and the other end of the transmission connecting plate is rotationally connected to the sliding plate through a pin shaft.

5. The mechanical interlocking device according to claim 3, characterized in that: The support assembly includes: at least two guide shafts and a fixing seat; The guide shaft is provided with a corresponding long groove passing through the sliding plate, one end of the guide shaft is fixedly provided on the fixing seat, and the other end of the guide shaft is provided with a fixing piece; an annular groove is provided on the guide shaft, and the sliding plate slides along the cylindrical surface of the annular groove; at least two guide shafts are symmetrically arranged; A through hole is provided in the center of the fixing seat. The fixing seat passes through the input shaft of the grounding switch and is fixedly arranged above the grounding switch.

6. The mechanical interlocking device according to claim 5, characterized in that: Also includes: Dynamic padlock plate, static opening padlock plate and static closing padlock plate; The dynamic padlock plate penetrates through and is fixedly arranged on the input shaft of the grounding switch, and the dynamic padlock plate rotates along with the input shaft of the grounding switch; The static opening padlock plate is fixedly arranged at the corresponding position of the dynamic padlock plate mapped on the fixed seat when the input shaft of the earthing switch rotates to the opening position; the static closing padlock plate is fixedly arranged at the corresponding position of the dynamic padlock plate mapped on the fixed seat when the input shaft of the earthing switch rotates to the closing position; The dynamic padlock plate, the static opening padlock plate and the static closing padlock plate are provided with padlock holes; when the dynamic padlock plate rotates to the closing position along with the input shaft of the earthing switch, the padlock hole on the dynamic padlock plate overlaps with the padlock hole on the static closing padlock plate; when the dynamic padlock plate rotates to the opening position along with the input shaft of the earthing switch, the padlock hole on the dynamic padlock plate overlaps with the padlock hole on the static opening padlock plate.

7. The mechanical interlocking device according to claim 6, characterized in that: Also included: board and micro switches; The micro switch is fixed on the fixing seat through the plate, and the micro switch is arranged on one side of the dynamic padlock plate; the micro switch is connected in series in the electrical circuit of the driving mechanism of the isolating switch; when the dynamic padlock plate rotates to the opening position along with the input shaft of the grounding switch, the dynamic padlock plate squeezes the contact pressure wheel of the micro switch.

8. The mechanical interlocking device according to claim 7, characterized in that: Also includes: Pointer, opening indicator and closing indicator; The fixing portion of the pointer is fixedly arranged on the surface of the dynamic padlock plate, the indicating portion of the pointer is perpendicular to the fixing portion of the pointer, and the indicating portion of the pointer points to the side wall of the fixing seat; The opening gate indicator is fixed to the side wall of the fixing seat and at a position corresponding to the static opening gate padlock plate; The closing indicator plate is fixed to the side wall of the fixing seat at a position corresponding to the static closing padlock plate.

9. A high voltage combined switch device, characterized in that: include: An isolating switch, a driving mechanism, an earthing switch, a tank assembly, and a mechanical interlocking device as claimed in any one of claims 1 to 8; The isolating switch and the grounding switch are arranged inside the tank assembly, and the driving mechanism and the mechanical interlocking device are arranged outside the tank assembly; one end of the mechanical interlocking device is connected to the input shaft of the isolating switch, and the other end of the mechanical interlocking device is arranged above the input shaft of the grounding switch; the driving mechanism is drivingly connected to the input shaft of the isolating switch.

10. A high voltage GIS device, characterized in that: include: At least one high-voltage combined switch device as claimed in claim 9; each of the high-voltage combined switch devices is connected to a corresponding busbar.

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