Isolating ground knife switch device

Abstract

The application discloses an isolated grounding knife switch device, which comprises a base, a knife switch assembly and a locking assembly. The knife switch assembly comprises a first knife switch, a second knife switch and two connecting pieces, and the first knife switch and the second knife switch are movably installed on the base through the connecting pieces respectively. The locking assembly comprises a locking piece, two locking plates and two locking pins. The two locking plates are installed on the two connecting pieces respectively, and the locking plate is provided with a locking groove matched with the locking pin. The locking piece can reciprocate relative to the base. When the first knife switch is located at a closed position, the locking plate corresponding to the first knife switch abuts against the locking pin and moves the locking pin to a position abutting against one end of the locking piece, so that the other end of the locking piece moves to abut against the locking pin corresponding to the second knife switch until the locking pin is inserted into the locking groove matched with the locking pin, and then the second knife switch is limited to move from an open position to the closed position. The technical scheme of the application limits the simultaneous closing operation of the two knife switches through the movement of the mechanical structure, and is beneficial to improving the safety of the isolated grounding knife switch device.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and in particular to an isolating grounding switch device. Background Technology

[0002] Currently, before any maintenance work is carried out on rail transit, the isolating switch must be disconnected first, and then the grounding switch must be closed after voltage testing. Similarly, after the testing is completed, the grounding switch must be disconnected first, and then the isolating switch closed before any subsequent power supply work can proceed. In other words, during daily use or maintenance, simultaneous closing of the isolating switch and the grounding switch should be avoided to prevent safety hazards.

[0003] In related technologies, to avoid the simultaneous closing of isolating switches and grounding switches, an electrical anti-misoperation interlocking device is designed in rail transit systems. This device uses auxiliary switches and other electronic devices to detect the positions of the isolating switches and grounding switches. When the isolating switch is detected to be in the closed position, the grounding switch cannot be closed, and vice versa.

[0004] However, in related technologies, there are often issues such as loose wiring inside the electrical anti-misoperation interlocking device or abnormal location acquisition, which can lead to the device malfunctioning and pose significant safety hazards. Therefore, it is urgent for those skilled in the art to make improvements. Summary of the Invention

[0005] The main objective of this invention is to propose an isolation grounding switch device, which aims to solve the technical problem of low electrical safety in existing rail transit systems.

[0006] To achieve the above objectives, the present invention proposes an isolating grounding switch device, comprising a base, a switch assembly, and a locking assembly; wherein,

[0007] The disconnector assembly includes a first disconnector, a second disconnector, and two connecting members. The first disconnector and the second disconnector are movably mounted on the base via one of the connecting members.

[0008] The locking assembly includes a locking element, two locking plates, and two locking pins;

[0009] The two locking plates are respectively installed on the two connecting members, and the two locking plates are respectively corresponding to the two locking pins. Each locking plate is provided with a locking groove that cooperates with the locking pin.

[0010] The locking element is movably disposed on the base, and the locking element is capable of reciprocating relative to the base;

[0011] When the first disconnector is in the closed position, the locking piece corresponding to the first disconnector abuts against the locking pin and moves the locking pin to a position abutting one end of the locking member, so that the other end of the locking member moves to abut against the locking pin corresponding to the second disconnector. Under the action of the locking pin corresponding to the second disconnector and the locking groove, the locking pin is inserted into the locking groove that matches it, thereby restricting the second disconnector from moving from the open position to the closed position.

[0012] In one possible implementation, when both the first disconnector and the second disconnector are in the open position, the two locking plates are respectively spaced apart from their corresponding locking pins.

[0013] In one possible implementation, the locking member is elongated and its middle part is rotatably connected to the base so that both ends of the locking member can rotate relative to the base. Each end of the locking member is respectively provided with two locking pins. When one end of the locking member is abutted by one of the locking pins, the other end of the locking member can rotate and abut against the other locking pin.

[0014] In one possible implementation, both connecting members include a rotating shaft, the first knife gate and the second knife gate are respectively connected to the corresponding rotating shaft, both rotating shafts are rotatably mounted on the base and arranged in parallel, two locking plates are respectively sleeved on the corresponding rotating shaft, the locking member extends along the direction of the two rotating shafts approaching or moving away from each other, both locking plates are located on the same side of the locking member, and two locking pins are respectively disposed between the corresponding locking plates and the locking member.

[0015] In one possible implementation, the locking assembly further includes two lock bodies that correspond one-to-one with the two locking pins. The lock bodies are fixedly mounted on the base. Each lock body includes a first side facing the corresponding side of the locking plate and a second side facing the corresponding side of the movable end. The locking pins are slidably mounted on the corresponding lock bodies and pass through the first and second sides of the corresponding lock bodies.

[0016] In one possible implementation, the connector is rotatably mounted on the base, and the periphery of each of the two locking plates is formed with a first limiting surface, a connecting surface and a second limiting surface connected in sequence along their own rotation direction. The first limiting surface and the second limiting surface are arranged in a planar shape and intersect at an angle. The locking groove is provided on the first limiting surface.

[0017] When the first knife switch is in the open position, the locking plate corresponding to the first knife switch rotates to its first limiting surface facing the lock body on the corresponding side. When the first knife switch is in the closed position, the locking plate corresponding to the first knife switch rotates to its second limiting surface facing the lock body on the corresponding side and abuts against the locking pin on the corresponding side.

[0018] In one possible implementation, when the rotating shaft rotates, the connection between the corresponding first and second limiting surfaces can abut against the locking pin on the corresponding side; wherein...

[0019] The connection between the first limiting surface and the second limiting surface is a convex arc surface.

[0020] In one possible implementation, each of the first side surfaces is provided with two limiting portions, which are respectively located on opposite sides of the corresponding locking pin. The two limiting portions are respectively used to abut against the first limiting surface and the second limiting surface, so that the first limiting surface and the second limiting surface are parallel to the first side surface of the corresponding side.

[0021] In one possible implementation, each of the locking pins includes a plug portion protruding from the first side, the plug portion engaging with a locking groove on the corresponding side.

[0022] An elastic element is provided between the plug and the lock body on the corresponding side. The elastic element is used to provide elastic force to the plug to drive the plug to move towards the locking plate on the corresponding side.

[0023] In one possible implementation, each of the locking pins includes a drive portion protruding from the second side;

[0024] The outer peripheral wall of the transmission part is fitted with a limiting member, which is used to abut against the lock body when the transmission part slides a preset distance toward the lock body on the corresponding side, so as to restrict the transmission part from retracting into the lock body on the corresponding side.

[0025] In one possible implementation, the base includes a mounting base plate and a first side plate and a second side plate erected on the mounting base plate. The first side plate and the second side plate are disposed opposite to each other. Two connecting members are rotatably mounted between the first side plate and the second side plate. Each connecting member includes a first transmission section passing through the first side plate. The locking plate is sleeved on the first transmission section on the corresponding side. The locking member and the locking pin are both mounted on the side of the first side plate facing away from the second side plate.

[0026] In one possible implementation, the knife switch assembly further includes two drive motors that correspond one-to-one with the two connecting members. Both drive motors are mounted on the side of the second side plate facing away from the first side plate. The output end of the drive motor is connected to the corresponding rotating shaft to drive the corresponding rotating shaft to rotate.

[0027] The isolating grounding switch device of this invention features a locking element that engages with the two connecting parts corresponding to the first and second disconnect switches. Movable locking pins are provided at both ends of the locking element, and locking grooves are provided on both connecting parts to engage with the corresponding locking pins. When one connecting part moves the corresponding disconnect switch from the open position to the closed position, the locking pins on the corresponding connecting part move one end of the locking element, allowing the other end of the locking element to move and press the corresponding locking pin against the corresponding locking groove. This restricts the other connecting part from moving the disconnect switch from the open position to the closed position. Thus, the simultaneous closing operation of both disconnect switches is restricted by the movement of the mechanical structure, ensuring the safety of the isolating grounding switch device. Furthermore, the locking element of the mechanical structure does not suffer from technical problems such as faulty cables or abnormal switch position acquisition, which helps ensure the operational safety of the product.

[0028] Furthermore, it should be noted that the design of this application sets the locking groove on the locking plate that can be detachably matched with the connector. Compared with the structure of setting the locking groove on the connector, the design of this application is beneficial to avoid the inconvenience of disassembling the large structural component of the connector from the base during the later product maintenance process, thereby improving the product maintenance convenience. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of an embodiment of the isolation grounding switch device of the present invention;

[0031] Figure 2 for Figure 1 Another schematic diagram of the medium-isolation grounding switch device;

[0032] Figure 3 for Figure 1 Another schematic diagram of the medium isolation grounding switch device;

[0033] Figure 4 for Figure 1 A schematic diagram of the next state of the isolation grounding switch device;

[0034] Figure 5 for Figure 1 A front view of the isolating grounding switch device;

[0035] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0036] Figure 7 for Figure 5 A magnified view of a section at point B in the middle;

[0037] Figure 8 for Figure 2 A front view of the isolating grounding switch device;

[0038] Figure 9 for Figure 8 A magnified view of a section at point C;

[0039] Figure 10 for Figure 8 A magnified view of a section at point D;

[0040] Figure 11 for Figure 3 A front view of the isolating grounding switch device;

[0041] Figure 12 for Figure 11 A magnified view of a section at point E in the middle;

[0042] Figure 13 for Figure 11 A magnified view of a section at point F in the middle;

[0043] Figure 14 for Figure 1 Cross-sectional view of the auxiliary lock;

[0044] Figure 15 This is a schematic diagram of the locking plate.

[0045] Figure 16 This is a schematic diagram of the locking mechanism.

[0046] Explanation of icon numbers:

[0047] 1. Base; 11. Mounting base plate; 12. First side plate; 13. Second side plate; 2. Knife switch assembly; 21. First knife switch; 22. Second knife switch; 23. Connecting piece; 231. Rotating shaft; 231a. First transmission section; 232. Transmission rod; 24. Drive motor; 3. Locking assembly; 31. Locking element; 311. Second weight reduction hole; 32. Locking plate; 321. Locking groove; 322. First limiting surface; 323. Connecting surface; 324. Second limiting surface; 325. First weight reduction hole; 33. Locking pin; 331. Insertion part; 332. Transmission part; 34. Lock body; 341. First side; 342. Second side; 343. Limiting part; 35. Elastic element; 36. Limiting element; 4. Wiring terminal; 5. Grounding terminal; 6. Isolation terminal.

[0048] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0050] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0051] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0052] This invention proposes an isolation grounding switch device.

[0053] In embodiments of the present invention, such as Figures 1 to 16As shown, the isolating grounding switch device includes a base 1, a switch assembly 2, and a locking assembly 3.

[0054] Please see Figures 1 to 5 The base 1 is provided with wiring terminals 4, grounding terminals 5, and isolation terminals 6, which are arranged in pairs and spaced apart from each other. Specifically, the wiring terminals 4, grounding terminals 5, and isolation terminals 6 can be fixedly connected to the base 1 by means of threaded connection, riveting, welding, or other methods, and no specific restrictions are made here.

[0055] The disconnector assembly 2 includes a first disconnector 21, a second disconnector 22, and two connecting pieces 23. The first disconnector 21 and the second disconnector 22 are movably mounted on the base 1 via a connecting piece 23. Specifically, the first disconnector 21 and the second disconnector 22 are arranged in a one-to-one correspondence with the two connecting pieces 23. The connecting pieces 23 can reciprocate relative to the base 1 so that the corresponding disconnector can move between the closed position and the open position.

[0056] Specifically, the first disconnect switch 21 can be a grounding disconnect switch, and the second disconnect switch 22 can be an isolating disconnect switch. When the first disconnect switch 21 is in the closed position, the wiring terminal 4 and the grounding terminal 5 are connected. When the first disconnect switch 21 is in the open position, the wiring terminal 4 and the grounding terminal 5 are disconnected. When the second disconnect switch 22 is in the closed position, the wiring terminal 4 and the isolating terminal 6 are connected. When the second disconnect switch 22 is in the open position, the wiring terminal 4 and the isolating terminal 6 are disconnected.

[0057] Because the five-prevention system of the traction power supply system clearly stipulates that it is forbidden to close the grounding switch while it is energized, and it is forbidden to close the isolating switch with the grounding wire connected. That is to say, it is forbidden for the first switch 21 and the second switch 22 to be in the closed position at the same time. Therefore, during daily use or maintenance, the isolating grounding switch device can only be in the position as follows. Figure 1 (The first disconnector 21 is in the closed position, while the second disconnector 22 is in the open position.) Figure 2 (The first disconnector 21 is in the open position, while the second disconnector 22 is in the closed position) and Figure 3 (Both the first disconnector 21 and the second disconnector 22 are in the open position) as shown, and cannot be in the state shown. Figure 4 The state shown is as follows (both the first disconnector 21 and the second disconnector 22 are in the closed position).

[0058] Currently, relevant technologies are designed to avoid situations such as Figure 4When the first disconnector 21 and the second disconnector 22 are both in the closed position, an electrical anti-misoperation interlocking device (not shown) is designed on the isolation grounding disconnector device to detect the position of the first disconnector 21 and the second disconnector 22 through auxiliary switches and other electronic devices. When one of the first disconnector 21 and the second disconnector 22 is detected to be in the closed position, the other disconnector 21 and the second disconnector 22 cannot switch from the open position to the closed position.

[0059] Because significant safety hazards can easily arise when electrical interlocking fails (such as due to loose wiring inside the electrical anti-misoperation interlocking device or abnormal position acquisition), mechanical interlocking must also be considered to address the problem of electrical interlocking failure. Therefore, this application proposes an interlocking component 3, the specific structure of which is described below.

[0060] Specifically, the locking assembly 3 includes a locking element 31, two locking plates 32, and two locking pins 33.

[0061] Two locking plates 32 are respectively installed on two connecting parts 23. The two locking plates 32 are set in a one-to-one correspondence with the two locking pins 33. Each locking plate 32 is provided with a locking groove 321 that cooperates with the locking pin 33.

[0062] The locking member 31 is movably disposed on the base 1. The locking member 31 can reciprocate relative to the base 1, and both ends of the locking member 31 are respectively disposed close to the two locking pieces 32.

[0063] One of the two locking pins 33 is movably disposed between one end of the locking member 31 and the corresponding locking piece 32, and the other locking pin 33 is movably disposed between the other end of the locking member 31 and the corresponding locking piece 32. Each locking pin 33 can reciprocate between the locking member 31 and the corresponding locking piece 32.

[0064] When the disconnector (first disconnector 21 or second disconnector 22) is in the open position, the slot of the locking groove 321 corresponding to the disconnector faces the locking pin 33 on the corresponding side. When the disconnector is in the closed position, the locking groove 321 corresponding to the disconnector is misaligned with the locking pin 33 on the corresponding side, so that the locking pin 33 cannot be inserted into the locking groove 321 on the corresponding side.

[0065] When the first disconnector 21 is in the closed position, the locking piece 32 corresponding to the first disconnector 21 abuts against the corresponding locking pin 33 and moves the locking pin 33 to a position abutting one end of the locking member 31, so that the other end of the locking member 31 moves to abut against the locking pin 33 corresponding to the second disconnector 22. Under the action of the locking pin 33 and the locking groove 321 corresponding to the second disconnector 22, the locking pin 33 is inserted into the locking groove 321 that cooperates with it, thereby restricting the second disconnector 22 from moving from the open position to the closed position.

[0066] Similarly, when the second disconnector 22 is in the closed position, the locking piece 32 corresponding to the second disconnector 22 abuts against the locking pin 33 and moves the locking pin 33 to abut against one end of the locking member 31, so that the other end of the locking member 31 moves to abut against the locking pin 33 corresponding to the first disconnector 21 until the locking pin 33 is inserted into the locking groove 321 that cooperates with it, thereby restricting the first disconnector 21 from moving from the open position to the closed position.

[0067] It is understood that the isolation grounding switch device of the present invention, by setting a locking member 31 between two connecting members 23 corresponding one-to-one with the first switch 21 and the second switch 22, can be driven and cooperated with the two connecting members 23, and a movable locking pin 33 is set at both ends of the locking member 31. A locking groove 321 is set on each of the two connecting members 23 to engage with the corresponding locking pin 33. Thus, when one of the two connecting members 23 drives the corresponding switch from the open position to the closed position, based on the connection corresponding to that switch... Part 23 and locking pin 33 drive one movable end of locking part 31 to move, enabling the other movable end of locking part 31 to move and push the corresponding locking pin 33 against the corresponding locking groove 321, thereby restricting the other connecting part 23 from moving the disconnect switch from the open position to the closed position. In this way, the movement of the mechanical structure restricts the two disconnect switches from closing simultaneously, ensuring the safety of the isolation grounding disconnect switch device. Moreover, the locking part 31 of the mechanical structure does not have technical problems such as false cables or abnormal switch position acquisition, which helps to ensure the operational safety of the product.

[0068] Furthermore, it should be noted that the design of this application is to set the locking groove 321 on the locking piece 32 that is detachably engaged with the connector 23. Compared with the structure of setting the locking groove 321 on the connector 23, the design of this application is beneficial to avoid the inconvenience of disassembling the large structural component of the connector 23 from the base 1 during the later product maintenance process, thereby improving the product maintenance convenience.

[0069] When both the first disconnector 21 and the second disconnector 22 are in the open position, the two locking plates 32 are respectively spaced apart from their corresponding locking pins 33. That is to say, when both the first disconnector 21 and the second disconnector 22 are in the open position, their respective locking plates 32 can move, thus facilitating the repositioning of either the first disconnector 21 or the second disconnector 22 to close the circuit.

[0070] It should be noted that the connecting member 23 can move in various ways. In some embodiments, the connecting member 23 can drive the corresponding knife switch to move by linear reciprocating movement. In this embodiment, the locking member 31 and the locking pin 33 also move by linear reciprocating movement. To facilitate understanding of how this solution restricts the simultaneous closing operation of the two knife switches through the movement of the mechanical structure, a brief explanation is given below:

[0071] Two connecting parts 23 are arranged in parallel and reciprocate linearly in the vertical direction. The locking part 31 is arranged in a horizontal direction and reciprocates linearly between the two connecting parts 23. The locking pin 33 is arranged in a horizontal direction and reciprocates between the moving end of the corresponding locking part 31 and the corresponding connecting part 23. When the first knife switch 21 and the second knife switch 22 are both in the open position, the slots of the locking grooves 321 on the two locking plates 32 are facing the locking pin 33. When the first knife switch 21 located on the left side of the locking part 31 moves from the open position to the closed position, the left connecting part 23 moves upward. During the movement, the left connecting part 23 drives the locking plate 32 to gradually apply a rightward force to the left locking pin 33, thereby causing the locking part 31 to move to the right until it hits the right locking pin 33 into the right locking groove 321, thereby restricting the right connecting part 23 from moving upward to close the circuit.

[0072] In other embodiments, the connector 23 can drive the corresponding knife switch to move by rotating. Preferably, the connector 23 of this application moves by rotating because it requires less space than linear reciprocating movement, which helps to reduce the footprint of the product.

[0073] When the connector 23 moves by rotation, specifically, each connector 23 includes a rotating shaft 231 and a transmission rod 232. The rotating shafts 231 of the two connectors 23 are rotatably mounted on the base 1 and arranged in parallel. The first knife switch 21 and the second knife switch 22 are respectively connected to the corresponding rotating shaft 231 through the corresponding transmission rod 232. The rotating shaft 231 rotates to move the corresponding knife switch between the closed position and the open position. The two locking plates 32 are respectively sleeved on the corresponding rotating shaft 231.

[0074] In embodiments where the connecting member 23 rotates, in some implementations, the locking member 31 and the locking pin 33 also move by linear reciprocating motion. Similarly, this implementation is briefly described below:

[0075] The locking element 31 is set to reciprocate linearly in the horizontal direction. The two locking pins 33 reciprocate linearly at the left and right ends of the locking element 31, respectively. One rotating shaft 231 rotates on the left side of the locking element 31, and the other rotating shaft 231 rotates on the right side of the locking element 31. When the first knife switch 21 and the second knife switch 22 are both in the open position, the slots of the locking grooves 321 on the two locking plates 32 face the locking pins 33. When the first knife switch 21 located on the left side of the locking element 31 moves from the open position to the closed position, the left connecting member 23 rotates (clockwise or counterclockwise). During the rotation, the left connecting member 23 drives the locking plate 32 to gradually apply a force to the left locking pin 33 to move to the right, thereby causing the locking element 31 to move to the right until it hits the right locking pin 33 into the right locking groove 321, thereby restricting the right connecting member 23 from rotating to close the lock.

[0076] In other embodiments, the locking member 31 can also be moved by rotation. Similarly, since the rotational movement requires less space, this application preferably adopts the rotational movement of the locking member 31. Specifically, the locking member 31 is elongated and the middle part of the locking member 31 is rotatably connected to the base 1 so that both ends of the locking member 31 can rotate relative to the base 1. The locking member 31 extends along the direction of the two rotation axes 231, which are close to or far from each other. The two ends of the locking member 31 are respectively provided with two locking pins 33. When one end of the locking member 31 is abutted by a locking pin 33, the other end of the locking member 31 can rotate and abut against the other locking pin 33.

[0077] The following is a brief description of the operation process when the locking element 31 is rotated:

[0078] Both rotating shafts 231 are located on the upper side (or lower side, depending on the context) of the locking element 31. One locking pin 33 moves up and down between the left rotating shaft 231 and the locking element 31, and the other locking pin 33 moves up and down between the right rotating shaft 231 and the locking element 31. When both the first knife switch 21 and the second knife switch 22 are in the open position, the slots 321 on the two locking plates 32 face the locking pins 33. When the knife switch on the left side of the locking element 31 moves from the open position to the closed position, the left connecting member 23 rotates (clockwise or counterclockwise). (Both can be moved), and during the rotation of the left connecting member 23, the left locking groove 321 and the left locking pin 33 are misaligned. The periphery of the locking plate 32 gradually applies a downward force to the left locking pin 33. The left end of the locking member 31 moves downward, causing the right end of the locking member 31 to push upward. The right locking pin 33 moves upward under the action of the right end of the locking member 31 and inserts into the right locking groove 321. Since the right locking pin 33 cannot move downward, the rotation of the right rotating shaft 231 is restricted, thereby restricting the right knife switch from the open position to the closed position.

[0079] The locking assembly 3 also includes two lock bodies 34 that correspond one-to-one with the two locking pins 33. The lock bodies 34 are fixedly installed on the base 1. Each lock body 34 includes a first side 341 facing the corresponding side of the locking plate 32 and a second side 342 facing the corresponding side of the moving end. The locking pins 33 are slidably installed on the corresponding lock body 34 and pass through the first side 341 and the second side 342 of the corresponding lock body 34.

[0080] It is understandable that by adjusting the mounting angle of the lock body 34 on the base 1, and thus adjusting the orientation of the first side 341 and the second side 342 on the base 1, the moving direction of the locking pin 33 can be changed. Compared with directly mounting the locking pin 33 on the base 1, the design of this application can effectively improve the installation flexibility of the locking pin 33.

[0081] Please see Figure 6 , Figure 7 and Figure 15 The connector 23 is rotatably mounted on the base 1. The periphery of each of the two locking plates 32 is formed with a first limiting surface 322, a connecting surface 323 and a second limiting surface 324 connected in sequence along their own rotation direction. The first limiting surface 322 and the second limiting surface 324 are arranged in a planar shape and intersect at an angle. The locking groove 321 is provided on the first limiting surface 322.

[0082] When the first knife switch 21 is in the open position, the locking plate 32 corresponding to the first knife switch 21 rotates to its first limiting surface 322 facing the lock body 34 on the corresponding side. When the first knife switch 21 is in the closed position, the locking plate 32 corresponding to the first knife switch 21 rotates to its second limiting surface 324 facing the lock body 34 on the corresponding side and abuts against the locking pin 33 on the corresponding side.

[0083] It is understandable that by forming a first limiting surface 322 and a second limiting surface 324 in a planar shape on the periphery of the locking plate 32, the contact area when the periphery of the locking plate 32 engages with the locking pin 33 can be guaranteed, thereby ensuring the reliability of the transmission between the locking plate 32 and the locking pin 33.

[0084] When the rotating shaft 231 rotates, the connection between the corresponding first limiting surface 322 and the second limiting surface 324 can abut against the corresponding locking pin 33; wherein, the connection between the first limiting surface 322 and the second limiting surface 324 is a convex arc surface. It can be understood that if the connection between the first limiting surface 322 and the second limiting surface 324 is designed with an outwardly convex angular shape, then during the rotation of the locking plate 32, the angular shape is likely to interact with the locking pin 33, resulting in a decrease in the smoothness of the rotation of the locking plate 32.

[0085] In addition, to ensure the smooth rotation of the locking plate 32 and reduce the rotational load on the rotating shaft 231, each locking plate 32 is provided with a first weight reduction hole 325.

[0086] Each first side surface 341 is provided with two limiting portions 343, which are respectively located on opposite sides of the corresponding locking pin 33. The two limiting portions 343 are used to abut against the first limiting surface 322 and the second limiting surface 324, so that the first limiting surface 322 and the second limiting surface 324 are parallel to the corresponding first side surface 341. It can be understood that when the first limiting surface 322 is parallel to the first side surface 341 of the lock body 34, the opening of the locking groove 321 on the first limiting surface 322 is directly facing the first side surface 341, thereby ensuring the accuracy of the alignment between the locking pin 33 extending from the first side surface 341 of the lock body 34 and the locking groove 321. When the second limiting surface 324 is parallel to the side surface of the lock body 34, the second limiting surface 324 can apply force to the locking pin 33 along the moving direction of the locking pin 33, ensuring the accuracy of the direction of force applied to the locking pin 33.

[0087] In specific implementations, in some embodiments, a limiting screw can be installed on the lock body 34, and the end of the limiting screw can protrude from the lock body 34 to form a limiting part 343. In other embodiments, a protruding column can be provided on the side of the lock body 34 to form a limiting part 343. Since there are many ways to form the limiting part 343, they will not be listed one by one here.

[0088] Each locking pin 33 includes a insertion portion 331 protruding from the first side surface 341, which engages with the locking groove 321 on the corresponding side. An elastic element 35 is provided between the insertion portion 331 and the lock body 34 on the corresponding side. The elastic element 35 provides elastic force to the insertion portion 331 to drive the insertion portion 331 to move towards the locking piece 32 on the corresponding side. It is understood that after the locking pin 33 is abutted by the second limiting surface 324, the insertion portion 331 can easily move and extend into the lock body 34. In order to ensure the continuous engagement between the locking pin 33 and the locking piece 32, and to ensure that the insertion portion 331 can at least partially protrude from the side of the lock body 34 and engage with the locking groove 321, an elastic element 35 is introduced in this embodiment so that the insertion portion 331 of the locking pin 33 is driven to protrude from the first side surface 341 of the lock body 34 under the action of the elastic force of the elastic element 35.

[0089] In specific implementation, the elastic element 35 can be an elastic structural element such as a spring or rubber band, and there are no specific restrictions on this.

[0090] Each locking pin 33 includes a transmission part 332 protruding from the second side 342; a limiting member 36 is sleeved on the outer peripheral wall of the transmission part 332. The limiting member 36 is used to abut against the lock body 34 when the transmission part 332 slides a preset distance toward the lock body 34 on the corresponding side, so as to limit the transmission part 332 from retracting into the lock body 34 on the corresponding side. It can be understood that limiting the transmission part 332 from extending into the lock body 34 by the limiting member 36 helps to ensure the reliability of the abutment between the transmission part 332 and the locking member 31. In specific implementation, the limiting member 36 can be a limiting ring sleeved on the transmission part 332, or a limiting protrusion protruding from the peripheral wall of the transmission part 332. No specific limitation is made here.

[0091] To reduce the supporting pressure on the pivot shaft in the middle of the locking member 31, in this embodiment, a second weight-reducing hole 311 is provided between the middle of the locking member 31 and either moving end. Furthermore, it should be noted that by reducing the weight on both sides of the middle of the locking member 31, both moving ends of the locking member 31 can rotate under a smaller force, thereby improving the sensitivity of the locking assembly 3.

[0092] Preferably, the number of second weight-reducing holes 311 on both sides of the middle of the locking member 31 is the same.

[0093] Meanwhile, in order to ensure that both ends of the locking member 31 are at the same height when both the first knife switch 21 and the second knife switch 22 are in the open state, preferably, the weights of the opposite sides of the rotating shaft of the locking member 31 are the same.

[0094] The base 1 includes a mounting base plate 11 and a first side plate 12 and a second side plate 13 erected on the mounting base plate 11. The first side plate 12 and the second side plate 13 are arranged opposite to each other. Two connecting pieces 23 are rotatably mounted between the first side plate 12 and the second side plate 13. Each connecting piece 23 includes a first transmission section 231a passing through the first side plate 12. A locking piece 32 is sleeved on the corresponding side of the first transmission section 231a. The locking element 31 and the locking pin 33 are both mounted on the side of the first side plate 12 facing away from the second side plate 13. It is understood that mounting the locking assembly 3 on the side of the first side plate 12 facing away from the second side plate 13 makes it easier for operators to observe the operating status of each component of the locking assembly 3 and to perform centralized maintenance and installation.

[0095] During the movement of the drive connector 23, in some embodiments, the power source of the rotating shaft 231 can come from the operator. Taking the connector 23 as an example of rotating movement, the operator can make the rotating shaft 231 rotate by applying force to the rotating shaft 231 of the connector 23, thereby causing the corresponding knife switch to close or open. In other embodiments, the power source of the rotating shaft 231 can also come from structural components or structural assemblies that can provide power, such as the drive motor 24, hydraulic pump, and pneumatic pump. The knife switch can rotate relative to the base 1 or perform reciprocating linear motion or swing within a preset angle under the drive of the power source.

[0096] Since the connector 23 of this application preferably moves by rotation, it is preferable that the connector 23 is driven by the drive motor 24. Specifically, the knife switch assembly 2 also includes two drive motors 24 that are arranged one-to-one with the two connectors 23. Both drive motors 24 are installed on the side of the second side plate 13 facing away from the first side plate 12. The output end of the drive motor 24 is connected to the corresponding rotating shaft 231 for transmission, so as to drive the corresponding rotating shaft 231 to rotate.

[0097] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An isolating grounding switch device, characterized in that, Includes a base, a knife switch assembly, and a locking assembly; among which, The disconnector assembly includes a first disconnector, a second disconnector, and two connecting members. The first disconnector and the second disconnector are movably mounted on the base via one of the connecting members. The locking assembly includes a locking element, two locking plates, and two locking pins; The two locking plates are respectively installed on the two connecting members, and the two locking plates are respectively corresponding to the two locking pins. Each locking plate is provided with a locking groove that cooperates with the locking pin. The locking element is movably disposed on the base and is rotatable relative to the base. The locking element is elongated and rotatably connected to the base at its middle section, allowing both ends of the locking element to rotate relative to the base. Each end of the locking element corresponds to one of the two locking pins. When one end of the locking element is abutted by one of the locking pins, the other end of the locking element can rotate and abut against the other locking pin. Both locking plates are located on the same side of the locking element, and the two locking pins are respectively disposed between the corresponding locking plates and the locking element. When the first disconnector is in the closed position, the locking piece corresponding to the first disconnector abuts against the locking pin and moves the locking pin to a position abutting one end of the locking member, so that the other end of the locking member moves to abut against the locking pin corresponding to the second disconnector. Under the action of the locking pin corresponding to the second disconnector and the locking groove, the locking pin is inserted into the locking groove that matches it, thereby restricting the second disconnector from moving from the open position to the closed position.

2. The isolating grounding switch device as described in claim 1, characterized in that, When both the first disconnector and the second disconnector are in the open position, the two locking plates are respectively spaced apart from their corresponding locking pins.

3. The isolating grounding switch device as described in claim 1, characterized in that, Both of the connecting components include a rotating shaft. The first knife gate and the second knife gate are respectively connected to the corresponding rotating shaft. Both rotating shafts are rotatably mounted on the base and arranged in parallel. Two locking plates are respectively sleeved on the corresponding rotating shafts. The locking components extend along the direction in which the two rotating shafts approach or move away from each other.

4. The isolating grounding switch device as described in claim 3, characterized in that, The locking assembly also includes two lock bodies that correspond one-to-one with the two locking pins. The lock bodies are fixedly installed on the base. Each lock body includes a first side of the locking plate facing the corresponding side and a second side of the moving end facing the corresponding side. The locking pins are slidably installed on the corresponding lock bodies and pass through the first and second sides of the corresponding lock bodies.

5. The isolating grounding switch device as described in claim 4, characterized in that, The connector is rotatably mounted on the base. The periphery of each of the two locking plates is formed with a first limiting surface, a connecting surface and a second limiting surface connected in sequence along its own rotation direction. The first limiting surface and the second limiting surface are arranged in a planar shape and intersect at an angle. The locking groove is provided on the first limiting surface. When the first knife switch is in the open position, the locking plate corresponding to the first knife switch rotates to its first limiting surface facing the lock body on the corresponding side. When the first knife switch is in the closed position, the locking plate corresponding to the first knife switch rotates to its second limiting surface facing the lock body on the corresponding side and abuts against the locking pin on the corresponding side.

6. The isolating grounding switch device as described in claim 5, characterized in that, When the rotating shaft rotates, the connection between the corresponding first limiting surface and the second limiting surface can abut against the locking pin on the corresponding side; wherein, The connection between the first limiting surface and the second limiting surface is a convex arc surface.

7. The isolating grounding switch device as described in claim 5, characterized in that, Each of the first side surfaces is provided with two limiting portions. The two limiting portions are respectively located on opposite sides of the corresponding locking pin. The two limiting portions are respectively used to abut against the first limiting surface and the second limiting surface, so that the first limiting surface and the second limiting surface are parallel to the first side surface of the corresponding side.

8. The isolating grounding switch device as described in claim 4, characterized in that, Each of the locking pins includes a plug portion protruding from the first side, the plug portion engaging with a locking groove on the corresponding side; An elastic element is provided between the plug and the lock body on the corresponding side. The elastic element is used to provide elastic force to the plug to drive the plug to move towards the locking plate on the corresponding side.

9. The isolating grounding switch device as described in claim 4, characterized in that, Each of the locking pins includes a transmission portion protruding from the second side; The outer peripheral wall of the transmission part is fitted with a limiting member, which is used to abut against the lock body when the transmission part slides a preset distance toward the lock body on the corresponding side, so as to restrict the transmission part from retracting into the lock body on the corresponding side.

10. The isolating grounding switch device as described in claim 3, characterized in that, The base includes a mounting base plate and a first side plate and a second side plate erected on the mounting base plate. The first side plate and the second side plate are arranged opposite to each other. The two connecting members are rotatably installed between the first side plate and the second side plate. Each connecting member includes a first transmission section that passes through the first side plate. The locking plate is sleeved on the first transmission section on the corresponding side. The locking member and the locking pin are both installed on the side of the first side plate facing away from the second side plate.

11. The isolating grounding switch device as described in claim 10, characterized in that, The knife switch assembly also includes two drive motors that are configured one-to-one with the two connecting parts. Both drive motors are installed on the side of the second side plate facing away from the first side plate. The output end of the drive motor is connected to the corresponding rotating shaft to drive the corresponding rotating shaft to rotate.

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