Dual pole isolated ground blade

Abstract

The application discloses a double-pole isolated grounding knife switch, comprising a mounting frame, two sets of isolated grounding mechanisms, two driving assemblies and a locking mechanism; wherein each set of isolated grounding mechanism comprises a first movable contact, a second movable contact and a first fixed contact, a second fixed contact and a third fixed contact which are fixed in sequence, the first movable contact is rotatably installed on the second fixed contact and has a closed position and an open position, the second movable contact is rotatably installed on the third fixed contact and has a closed position and an open position, the two driving assemblies are respectively used for synchronously driving the two first movable contacts to switch between the closed position and the open position and synchronously driving the two second movable contacts to switch between the closed position and the open position, and the locking mechanism can act on the two driving assemblies, when one driving assembly works or drives the corresponding first movable contact or second movable contact to the closed position, the locking mechanism can lock the other driving assembly. The technical scheme improves the safety of power supply.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a double-pole isolation grounding switch. Background Technology

[0002] In the power supply system of rail transit, the first and second electrodes of the traction substation are used to connect to the overhead contact line and return rail, respectively, for power supply. Before rail transit maintenance, the isolating switch used for power supply must be disconnected first. After verifying that there is no voltage, the grounding switch used for grounding is then closed. Similarly, after maintenance is completed, the grounding switch must be disconnected first, and then the isolating switch must be closed before subsequent power supply work can proceed.

[0003] In existing technologies, to achieve equipment integration and convenient operation and management, the isolating and grounding switches used for contact wires and return rails have been integrated to develop a new type of isolating and grounding switch. That is, the isolating and grounding switch includes an isolating switch structure and a grounding switch structure. Moreover, the isolating and grounding switches used for contact wires and return rails are usually installed in a power cabinet. Such a power cabinet may have multiple switch structures, which is prone to electric or manual misoperation, which may lead to "live grounding" or "grounded power supply" situations, which can easily cause significant safety hazards. Utility Model Content

[0004] The main purpose of this application is to provide a bipolar isolation grounding switch, which aims to improve the existing power cabinet structure that integrates multiple switches, which is prone to electric or manual misoperation, resulting in "grounding while energized" or "power supply from ground" problems.

[0005] To achieve the above objectives, this application proposes a bipolar isolation grounding switch, which includes a mounting frame, two sets of isolation grounding mechanisms, two drive components, and a locking mechanism; wherein,

[0006] Two sets of isolation grounding mechanisms are arranged side by side on the mounting frame. Each set of isolation grounding mechanisms includes a first moving contact, a second moving contact, and a first stationary contact, a second stationary contact, and a third stationary contact that are fixed in sequence. The first moving contact is rotatably mounted on the second stationary contact and has a closed position that is in contact with the first stationary contact and a closed position that is separated from the first stationary contact. The second moving contact is rotatably mounted on the third stationary contact and has a closed position that is in contact with the second stationary contact and a closed position that is separated from the second stationary contact. The two drive components are respectively used to synchronously drive the two first moving contacts to switch between the closed position and the open position and to synchronously drive the two second moving contacts to switch between the closed position and the open position; The locking mechanism can act on the two drive components respectively. When one drive component is working or after driving the corresponding first moving contact or second moving contact to rotate to the closed position, the locking mechanism can lock the other drive component.

[0007] In some embodiments of this application, both drive components include a rotating shaft rotatably mounted on the mounting bracket and a power source drivenly connected to the rotating shaft. The power source of one drive component is drivenly connected to the first moving contacts of the two sets of isolation grounding mechanisms through the rotating shaft, so as to synchronously drive the two first moving contacts to close or open with the corresponding first stationary contacts. The power source of the other drive component is drivenly connected to the second moving contacts of the two sets of isolation grounding mechanisms through the rotating shaft, so as to synchronously drive the two second moving contacts to close or open with the corresponding second stationary contacts.

[0008] In some embodiments of this application, the locking mechanism includes two locking grooved wheels and a locking rod. The two locking grooved wheels are respectively fixedly installed on the corresponding rotating shaft. Both locking grooved wheels are provided with locking grooves. The locking rod is movably disposed between the two locking grooved wheels. One of the rotating shafts drives the locking groove wheel to rotate, which can push against the locking rod and move it toward another rotating shaft to insert into the corresponding locking groove and restrict the rotation of the corresponding rotating shaft.

[0009] In some embodiments of this application, the locking rod includes an adjusting sub-rod and two locking sub-rods, the two locking sub-rods being respectively installed at both ends of the adjusting sub-rod and adjustable along the axial direction of the adjusting sub-rod to increase or decrease the length of the locking rod.

[0010] In some embodiments of this application, both ends of the adjusting rod are provided with threaded sections, and the two locking rods are respectively threadedly connected to the corresponding threaded sections. Both threaded sections are also threadedly connected with anti-loosening nuts, which abut against the corresponding locking rods.

[0011] In some embodiments of this application, the mounting bracket is provided with two fixing blocks spaced apart along the length of the locking rod, and both fixing blocks are provided with through holes. The locking rod is provided with two mating parts spaced apart along its length. The two ends of the locking rod pass through the corresponding through holes and slide against the corresponding locking groove wheel. An elastic element is also elastically installed between each mating part and the fixing block on the corresponding side.

[0012] In some embodiments of this application, each of the power sources includes a drive element and a worm gear reducer, wherein the drive element is connected to the rotating shaft via the worm gear reducer.

[0013] In some embodiments of this application, the rotating shaft is provided with a plug slot, the output shaft of the worm gear reducer is provided with a plug block, the power source is detachably mounted on the mounting bracket, and when the power source is mounted on the mounting bracket, the plug block is plugged into the plug slot.

[0014] In some embodiments of this application, the bipolar isolation grounding switch further includes two detectors, which are respectively installed on the worm gear reducers of the two drive components, for detecting the state of the output shaft of the corresponding worm gear reducer, so as to determine the opening and closing state of the first moving contact and the second moving contact respectively; Each of the detectors further controls the circuit switching of the drive assembly on which the other detector is installed, based on the detection result.

[0015] In some embodiments of this application, the bipolar isolation grounding switch further includes two auxiliary switches, which are respectively fixed on one side of the two rotating shafts. The contacts of the auxiliary switches are used to control the working state of the power source and detect the opening and closing state of the first moving contact and the second moving contact. A cam is provided on the rotating shaft to trigger the auxiliary switches.

[0016] In some embodiments of this application, the mounting bracket has a mounting plane, and the first stationary contact, the second stationary contact, and the third stationary contact each include a mounting base, a contact piece, and a fastener. The mounting base is fixedly mounted on the mounting bracket, and the contact piece is fixedly mounted on the mounting base by the fastener and is perpendicular to the mounting plane.

[0017] In some embodiments of this application, each of the mounting bases includes two clamping plates, with clamping surfaces on one side of the two clamping plates facing each other. The two opposite sides of the contact piece abut against the clamping surfaces of the two clamping plates respectively, and are fixedly connected to the two clamping plates respectively by the fasteners.

[0018] The bipolar isolation grounding switch provided in this application embodiment, through the aforementioned structural configuration, allows the locking mechanism to act on two drive components respectively, preventing the first moving contact and the second moving contact from simultaneously performing closing or opening operations, nor from being simultaneously in the closed position. This avoids the situation where the first and second moving contacts are simultaneously closed due to erroneous operation, thus preventing "live grounding" or "grounded energization" and improving the safety of the power supply system using this bipolar isolation grounding switch. Furthermore, since this bipolar isolation grounding switch integrates two sets of isolation grounding mechanisms, and the two drive components synchronously drive the two first moving contacts and the two second moving contacts to rotate, this avoids situations during rail transit maintenance where erroneous operation could cause the contact wire to be grounded while the return rail remains connected to the traction substation, or vice versa, further improving the safety of the power supply system using this bipolar isolation grounding switch. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of an embodiment of the bipolar isolation grounding switch of this application applied to the power supply system of rail transit; Figure 2 for Figure 1 Schematic diagram of the structure of the double-pole isolation grounding switch; Figure 3 for Figure 2 Another perspective on the bipolar isolation grounding switch; Figure 4 for Figure 2 Another perspective on the bipolar isolation grounding switch; Figure 5 for Figure 4 A partial exploded view of the bipolar isolation grounding switch; Figure 6 for Figure 4 A partial structural diagram of a bipolar isolation grounding switch; Figure 7 for Figure 2 A schematic diagram of the locking mechanism of the bipolar isolation grounding switch; Figure 8 for Figure 7 Exploded view of the central locking mechanism; Figure 9 for Figure 2A schematic diagram of the structure of the first stationary contact of the bipolar isolation grounding switch.

[0021] Explanation of icon numbers: 1000 Power supply system; 200 Traction substation; 300 Contact line; 400 Rail; 500 Return rail; 100 Double-pole isolation grounding switch; 10 Mounting bracket; 11 Fixing block; 111 Through hole; 12 Mounting plane; 20 Isolation grounding mechanism; 21 First moving contact; 22 Second moving contact; 23 First stationary contact; 231 Mounting base; 2311 Clamping plate; 2312 Base plate; 232 Contact piece; 233 Fastener; 234 Insulator; 24 Second stationary contact; 25 Third stationary contact 30. Drive assembly; 31. Shaft; 311. Insertion slot; 312. Cam; 32. Power source; 321. Drive component; 322. Worm gear reducer; 323. Insertion block; 33. First crank connecting rod assembly; 40. Locking mechanism; 41. Locking rod; 411. Adjusting rod; 4111. Threaded section; 412. Locking rod; 4121. Mating part; 413. Anti-loosening nut; 42. Locking groove wheel; 421. Locking groove; 43. Elastic element; 50. Detector; 60. Auxiliary switch; 61. Second crank connecting rod assembly.

[0022] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the embodiments of this application 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 this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] Furthermore, the use of terms such as "first" and "second" in this application is 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 as "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 only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0026] Please refer to Figures 1 to 5 The embodiments of this application provide a bipolar isolation grounding switch 100, which can be installed in a power cabinet and applied in the power supply system 1000 of rail transit. The bipolar isolation grounding switch 100 includes a mounting frame 10, two sets of isolation grounding mechanisms 20, two drive components 30 and a locking mechanism 40.

[0027] The mounting bracket 10 is used to install the various components of the double-pole isolation grounding switch 100, and can also be used to fix the double-pole isolation grounding switch 100 in the switch cabinet. The mounting bracket 10 is usually formed by connecting multiple plates together. The multiple plates are connected by welding, riveting, bolting or other connection methods. One of the plates can be fixed in the switch cabinet by bolting.

[0028] Two sets of isolation grounding mechanisms 20 are arranged side by side on the mounting frame 10. Each set of isolation grounding mechanisms 20 includes a first moving contact 21, a second moving contact 22, and a first stationary contact 23, a second stationary contact 24, and a third stationary contact 25 that are fixed in sequence. The first moving contact 21 is rotatably mounted on the second stationary contact 24 and has a closed position that is in contact with the first stationary contact 23 and an open position that is separated from the first stationary contact 23. The second moving contact 22 is rotatably mounted on the third stationary contact 25 and has a closed position that is in contact with the second stationary contact 24 and an open position that is separated from the second stationary contact 24.

[0029] The isolation grounding mechanism 20 is used to control the on / off state of the circuit. Therefore, the first moving contact 21, the second moving contact 22, the first stationary contact 23, the second stationary contact 24, and the third stationary contact 25 are all made of conductive material. Considering the overall structural stability of the mounting bracket 10, the mounting bracket 10 is usually made of metal. Therefore, the first stationary contact 23, the second stationary contact 24, and the third stationary contact are usually indirectly fixed to the mounting bracket 10 using insulating material. The first stationary contact 23, the second stationary contact 24, and the third stationary contact 25 are sequentially fixed and distributed at intervals along a preset direction, which can be vertical or horizontal.

[0030] In one set of isolation grounding mechanisms 20, the first stationary contact 23 is used to connect to the first electrode wire of the traction substation 200, the second stationary contact 24 is used to connect to the contact wire of the contact network 300, and the third stationary contact 25 is used to connect to the rail 400. In another set of isolation grounding mechanisms 20, the first stationary contact 23 is used to connect to the second electrode wire of the traction substation 200, the second stationary contact 24 is used to connect to the return rail 500, and the third stationary contact 25 is used to connect to the rail 400.

[0031] The two drive components 30 are respectively used to synchronously drive the two first moving contacts 21 to switch between the closed and open positions and to synchronously drive the two second moving contacts 22 to switch between the closed and open positions. The two first moving contacts 21 refer to the first moving contacts 21 of the two sets of isolation grounding mechanisms 20, and the two second moving contacts 22 refer to the second moving contacts 22 of the two sets of isolation grounding mechanisms 20.

[0032] Understandably, when one drive assembly 30 drives the first moving contact 21 from the closed position to the open position, this process is the opening process of the first moving contact 21. The first electrode and the second electrode of the traction substation 200 are disconnected from the contact wire 300 and the return rail 500, respectively. When the same drive assembly 30 drives the first moving contact 21 from the open position to the closed position, this process is the closing process of the first moving contact 21. The first electrode and the second electrode of the traction substation 200 are then connected to the contact wire 300 and the return rail 500, respectively. Similarly, when another drive assembly 30 drives the second moving contact 22 from the closed position to the open position, this process is the opening process of the second moving contact 22. The contact wire 300 and the return rail 500 are disconnected from the rail 400, respectively. When the same drive assembly 30 drives the second moving contact 22 from the open position to the closed position, this process is the closing process of the second moving contact 22. The contact wire 300 and the return rail 500 are then connected to the rail 400, respectively.

[0033] The locking mechanism 40 can act on the two drive components 30 respectively. When one drive component 30 is working or drives the corresponding first moving contact 21 or second moving contact 22 to rotate to the closed position, the locking mechanism 40 can lock the other drive component 30, so that the drive component 30 cannot work, that is, the drive component 30 cannot drive the corresponding first moving contact 21 or second moving contact 22 to rotate.

[0034] When a drive component 30 is working, it means that the drive component 30 is in an active state, driving the corresponding first moving contact 21 or second moving contact 22 to rotate. For ease of explanation of the function of the locking mechanism 40, this example names the two drive components 30 as the first drive component 30 and the second drive component 30, respectively. When the first drive component 30 drives the two first moving contacts 21 to close or open, the locking mechanism 40 can lock the second drive component 30, preventing the second drive component 30 from driving the two second moving contacts 22 to rotate. Specifically, when the first drive component 30 drives the two first moving contacts 21 to close or open, it means that the first drive component 30 drives the first moving contact 21 to switch from the open position to the closed position or vice versa. Similarly, when the second drive component 30 drives the two second moving contacts 22 to close or open, the locking mechanism 40 can lock the first drive component 30, preventing the first drive component 30 from driving the two first moving contacts 21 to rotate.

[0035] The bipolar isolation grounding switch 100 provided in this application embodiment, through the above-described structural configuration, allows the locking mechanism 40 to act on the two drive components 30 respectively, so that the first moving contact 21 and the second moving contact 22 cannot simultaneously perform closing or opening operations, nor can they be in the closing position at the same time. This can avoid the situation where the first moving contact 21 and the second moving contact 22 are closed simultaneously due to erroneous operation, that is, avoid the situation of "energized grounding" or "grounded power supply", thereby improving the safety of the power supply system 1000 using the bipolar isolation grounding switch 100. Furthermore, since the bipolar isolation grounding switch 100 integrates two sets of isolation grounding mechanisms 20, and drives the two first moving contacts 21 to rotate and the two second moving contacts 22 to rotate synchronously through two drive components 30 respectively, it can avoid the situation where, during rail transit maintenance, the contact wire 300 is grounded while the return rail 500 is still connected to the traction substation 200, or the return rail 500 is grounded while the contact wire 300 is still connected to the traction substation 200, due to misoperation, thus further improving the safety of the power supply system 1000 using the bipolar isolation grounding switch 100.

[0036] In some examples, such as Figures 2 to 5 As shown, both drive components 30 include a rotating shaft 31 rotatably mounted on the mounting bracket 10 and a power source 32 driven by the rotating shaft 31. The power source 32 of one drive component 30 is driven by the rotating shaft 31 to the first moving contact 21 of the two sets of isolation grounding mechanisms 20, so as to synchronously drive the two first moving contacts 21 to close or open with the corresponding first stationary contact 23. The power source 32 of the other drive component 30 is driven by the rotating shaft 31 to the second moving contact 22 of the two sets of isolation grounding mechanisms 20, so as to synchronously drive the two second moving contacts 22 to close or open with the corresponding second stationary contact 24.

[0037] There are several ways to rotatably mount the shaft 31 to the mounting bracket 10. In one mounting method, the shaft 31 is indirectly rotatably mounted to the mounting bracket 10 through at least one bearing. In another mounting method, the mounting bracket 10 is provided with at least two mounting holes at intervals, and the shaft 31 passes through at least two mounting holes and slides directly with the hole wall of the mounting hole to be directly rotatably mounted to the mounting bracket 10.

[0038] With this configuration, power is transmitted to the first moving contacts 21 of the two sets of isolation grounding mechanisms 20 through a rotating shaft 31, thus ensuring high synchronization between the two first moving contacts 21; power is transmitted to the second moving contacts 22 of the two sets of isolation grounding mechanisms 20 through another rotating shaft 31, thus ensuring high synchronization between the two second moving contacts 22.

[0039] Specifically, each rotating shaft 31 is connected to either the first moving contact 21 or the second moving contact 22 via the first crank-connecting rod assembly 33. This arrangement is intended to make the rotation of the first moving contact 21 and the second moving contact 22 smoother and more stable.

[0040] In some examples, such as Figure 2 , Figure 7 and Figure 8 As shown, the locking mechanism 40 includes two locking grooved wheels 42 and a locking rod 41. The two locking grooved wheels 42 are respectively fixedly installed on the corresponding rotating shafts 31. Both locking grooved wheels 42 are provided with locking grooves 421. The locking rod 41 is movably disposed between the two locking grooved wheels 42. The rotating shaft 31 drives the locking grooved wheel 42 to rotate, which can push against the locking rod 41 and move it towards the other rotating shaft 31 to insert into the corresponding locking groove 421 and restrict the rotation of the corresponding drive shaft.

[0041] The locking lever 41 is movably disposed between the two locking groove wheels 42, meaning that the locking lever 41 can move relative to the two locking groove wheels 42 and can move toward either locking groove wheel 42. That is, when the locking lever 41 is pushed by one locking groove wheel 42, it can move toward the other locking groove wheel 42 on which it is mounted.

[0042] In one configuration, the locking rod 41 is floating between two locking groove wheels 42. When the force on the locking rod 41 disappears, it springs back to its original position due to its own elasticity, thus exiting the locking groove 421. In another configuration, the locking rod 41 is slidably positioned between the two locking groove wheels 42. When the force on the locking rod 41 disappears, it does not spring back but remains in its original position. The locking groove 421 has guide surfaces on both sides. When the locking groove wheels 42 rotate synchronously with the drive shaft, they can push the locking rod 41 out of the locking groove 421 through the guide surfaces. In yet another configuration, the locking rod 41 is floating between the two locking groove wheels 42, and the locking groove 421 also has guide surfaces on both sides.

[0043] This configuration restricts the first moving contact 21 or the second moving contact 22 through the movement of the locking rod 41, making the first moving contact 21 and the second moving contact 22 mutually restrictive and independent, ensuring the safety of the double-pole isolation grounding switch 100 device. Furthermore, the mechanical locking mechanism 40 does not have technical problems such as loose cable connections or abnormal switch position acquisition, which helps to ensure the operational safety of the product.

[0044] In some examples, such as Figure 2 , Figure 7 and Figure 8 As shown, the locking rod 41 includes an adjusting rod 411 and two locking rods 412. The two locking rods 412 are respectively installed at both ends of the adjusting rod 411 and can be adjusted along the axial direction of the adjusting rod 411 to increase or decrease the length of the locking rod 41.

[0045] This design aims to adjust the length of the locking rod 41 to match the spacing between the two locking groove wheels 42, so that the locking rod 41 can be tightly engaged with the locking groove 421, thereby improving the locking reliability of the locking mechanism 40 and thus enhancing the safety of the bipolar isolation grounding switch 100.

[0046] There are various ways to connect the two locking sub-rods 412 to the adjusting sub-rod 411. In some examples, the adjusting sub-rod 411 has multiple mounting parts spaced apart along its axial direction at both ends, and the two locking sub-rods 412 can be detachably installed on any mounting part at their respective ends. Specifically, the mounting part is a socket, the locking sub-rod 412 is sleeved on the end of the adjusting sub-rod 411, and has a pin hole. The pin extends through the pin hole into the locking sub-rod 412 and engages with any of the socket holes to fix the locking sub-rod 412 to the end of the adjusting sub-rod 411.

[0047] In some other examples, such as Figure 7 and Figure 8 As shown, both ends of the adjusting rod 411 are provided with threaded sections 4111, and the two locking rods 412 are respectively threaded to the corresponding threaded sections 4111. Both threaded sections 4111 are also threaded with anti-loosening nuts 413, which abut against the corresponding locking rods 412.

[0048] With this configuration, the length of the locking rod 41 can be steplessly adjusted by rotating the adjusting rod 411 and / or the locking rod 412, improving the adjustment accuracy. Furthermore, the locking rod 412 can be prevented from loosening by the engagement of the anti-loosening nut 413.

[0049] In some examples, such as Figure 2 , Figure 7 and Figure 8As shown, the mounting bracket 10 has two fixing blocks 11 spaced apart along the length of the locking rod 41. Both fixing blocks 11 are provided with through holes 111. The locking rod 41 has two mating parts 4121 spaced apart along its length. The two ends of the locking rod 41 pass through the corresponding through holes 111 and slide against the corresponding locking groove wheel 42. Each mating part 4121 is also elastically installed with an elastic element 43 between it and the fixing block 11 on the corresponding side.

[0050] With this configuration, when one end of the locking rod 41 is not subjected to external force, the other end of the locking rod 41 can be disengaged from the locking groove 421 by the elastic force of the elastic element 43. This makes the movement of the locking rod 41 smoother and reduces the resistance encountered when the rotating shaft 31 rotates. At the same time, the locking rod 41 is restricted by the two through holes 111, and can only move along its axial direction, preventing the locking rod 41 from deviating in other directions (e.g., radial deviation perpendicular to its axial direction), thus extending the service life of the locking mechanism 40. In addition, the locking mechanism 40 has a simple structure and is easy to install.

[0051] Please refer to the above description of the locking rod 41 including two locking sub-rods 412 and the locking rod 41 having two mating parts 4121. In some examples, the two mating parts 4121 can be respectively provided on the two locking sub-rods 412. In some examples, such as Figures 3 to 6 As shown, each power source 32 includes a drive component 321 and a worm gear reducer 322. The drive component 321 is connected to the rotating shaft 31 via the worm gear reducer 322. The drive component 321 is a motor, preferably a servo motor. This configuration, based on the good self-locking property of the worm gear reducer 322, ensures that the first moving contact 21 and the second moving contact 22 will not reverse during opening or closing, thus ensuring smooth operation.

[0052] In some examples, such as Figure 5 and Figure 6 As shown, the rotating shaft 31 is provided with a insertion slot 311, and the output shaft of the worm gear reducer 322 is provided with a insertion block 323. The power source 32 is detachably mounted on the mounting bracket 10. When the power source 32 is mounted on the mounting bracket 10, the insertion block 323 and the insertion slot 311 are engaged to realize the transmission connection between the worm gear reducer 322 and the rotating shaft 31. This arrangement aims to modularize the drive assembly 30, facilitating the installation and disassembly of the drive assembly 30, and thus facilitating the maintenance of the power source 32.

[0053] In some examples, such as Figure 4As shown, the bipolar isolation grounding switch 100 also includes two detectors 50, which are respectively installed on the worm gear reducers 322 of the two drive components 30. They are used to detect the state of the output shaft of the corresponding worm gear reducer 322 to determine the opening and closing state of the first moving contact 21 and the second moving contact 22 respectively. Each detector 50 also controls the circuit on / off of the drive component 30 on which the other detector 50 is installed according to the detection result.

[0054] The drive unit 321 is connected to the rotating shaft 31 via a worm gear reducer 322. When the rotating shaft 31 rotates by a corresponding amplitude, the first moving contact 21 or the second moving contact 22 will open or close accordingly. The output shaft of the worm gear reducer 322 is connected to the rotating shaft 31. During the above process, the output shaft of the worm gear reducer 322 will also rotate by a corresponding angle. Therefore, the detector 50 can determine the opening or closing state of the first moving contact 21 and the second moving contact 22 by detecting the amplitude of the rotation of the output shaft of the worm gear reducer 322.

[0055] To facilitate the explanation of the function of the two detectors 50, this example names the two detectors 50 as the first detector 50 and the second detector 50, respectively. Please refer to the above description of the first drive assembly 30 and the second drive assembly 30. The first detector 50 is installed in the worm gear reducer 322 of the first drive assembly 30, and the second detector 50 is installed in the worm gear reducer 322 of the second drive assembly 30. With this configuration, when the first detector 50 detects that the first moving contact 21 is in the closed state, it disconnects the circuit of the second drive assembly 30, preventing the second drive assembly 30 from driving the second moving contact 22 to close; similarly, when the second detector 50 detects that the second moving contact 22 is in the closed state, it disconnects the circuit of the first drive assembly 30, preventing the first drive assembly 30 from driving the first moving contact 21 to close.

[0056] In some examples, detector 50 is a magnetic blow-out switch, and a trigger for triggering the magnetic blow-out switch is fixedly mounted on the output shaft of worm gear reducer 322.

[0057] In some examples, such as Figure 3 and Figure 4 As shown, the bipolar isolation grounding switch 100 also includes two auxiliary switches 60. The two auxiliary switches 60 are respectively fixed on one side of the two rotating shafts 31. The contacts of the two auxiliary switches 60 are used to control the working state of the two power sources 32 and to detect the opening and closing state of the first moving contact 21 and the second moving contact 22. Each rotating shaft 31 is provided with a cam 312 that triggers the corresponding auxiliary switch 60.

[0058] This configuration aims to detect the opening and closing status of the first moving contact 21 and the second moving contact 22 by triggering the corresponding auxiliary switch 60 through the cam 312 on the rotating shaft 31. This increases the number of wiring nodes, making it easier to control the control system of the double-pole isolation grounding switch 100. By using software control, the interlocking between the first drive component 30 and the second drive component 30 is achieved, thereby preventing the first moving contact 21 and the second moving contact 22 from closing simultaneously due to erroneous operation, and further improving the safety of the power supply system 1000 using this double-pole isolation grounding switch 100.

[0059] In some examples, the cam 312 on each shaft 31 triggers the corresponding auxiliary switch 60 via the second crank-connecting rod assembly 61.

[0060] In some examples, such as Figure 5 and Figure 9 As shown, the mounting bracket 10 has a mounting plane 12. The first stationary contact 23, the second stationary contact 24, and the third stationary contact 25 each include a mounting base 231, a contact piece 232, and a fastener 233. The mounting base 231 is fixedly mounted to the mounting bracket 10, and the contact piece 232 is fixedly mounted to the mounting base 231 by the fastener 233 and is perpendicular to the mounting plane 12. The mounting base 231 is usually indirectly fixedly mounted to the mounting bracket 10 using an insulator 234, thereby preventing leakage. Of course, in some examples, part or all of the material of the mounting base 231 is insulating material, and the mounting base 231 is directly fixedly connected to the mounting bracket 10 through the insulating part to prevent leakage.

[0061] The contact piece 232 abuts against the mounting base 231 and is fixedly connected by the fastener 233. In this way, the contact piece 232 used for wire connection and contact with the first moving contact 21 or the second moving contact 22 does not need to be welded and can be fixedly installed, avoiding the phenomenon of poor soldering of the contact piece 232. This avoids the situation of severe heating, melting and explosion of the poor soldering part when the current in the circuit is abnormal, thus improving the safety of the double-pole isolation grounding switch 100.

[0062] In some examples, such as Figure 9 As shown, each mounting base 231 includes two clamping plates 2311. The two clamping plates 2311 have clamping surfaces on their facing sides. The two opposite sides of the contact piece 232 abut against the clamping surfaces of the two clamping plates 2311 and are fixedly connected to the two clamping plates 2311 by fasteners 233. This arrangement allows the two clamping plates 2311 to clamp and fix the contact piece 232, making the contact piece 232 more secure and further improving the safety of the double-pole isolation grounding switch 100.

[0063] In some examples, the first stationary contact 23, the second stationary contact 24, and the third stationary contact 25 all include an insulator 234, which is fixedly disposed on the mounting plane 12. The mounting base 231 also includes a base plate 2312, which is fixedly installed on the side of the insulator 234 away from the mounting plane 12 by fasteners such as bolts 233. Two clamping plates 2311 are fixedly installed on the base plate 2312.

[0064] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A double-pole isolating grounding switch, characterized in that, The bipolar isolation grounding switch includes a mounting bracket, two sets of isolation grounding mechanisms, two drive components, and a locking mechanism; wherein... Two sets of isolation grounding mechanisms are arranged side by side on the mounting frame. Each set of isolation grounding mechanisms includes a first moving contact, a second moving contact, and a first stationary contact, a second stationary contact, and a third stationary contact that are fixed in sequence. The first moving contact is rotatably mounted on the second stationary contact and has a closed position that is in contact with the first stationary contact and a closed position that is separated from the first stationary contact. The second moving contact is rotatably mounted on the third stationary contact and has a closed position that is in contact with the second stationary contact and a closed position that is separated from the second stationary contact. The two drive components are respectively used to synchronously drive the two first moving contacts to switch between the closed position and the open position and to synchronously drive the two second moving contacts to switch between the closed position and the open position; The locking mechanism can act on the two drive components respectively. When one drive component is working or after driving the corresponding first moving contact or second moving contact to the closing position, the locking mechanism can lock the other drive component.

2. The bipolar isolation grounding switch as described in claim 1, characterized in that, Both drive components include a rotating shaft rotatably mounted on the mounting bracket and a power source driven through the rotating shaft. The power source of one drive component is driven through the rotating shaft to the first moving contacts of the two sets of isolation grounding mechanisms, so as to synchronously drive the two first moving contacts to close or open with the corresponding first stationary contacts. The power source of the other drive component is driven through the rotating shaft to the second moving contacts of the two sets of isolation grounding mechanisms, so as to synchronously drive the two second moving contacts to close or open with the corresponding second stationary contacts.

3. The bipolar isolation grounding switch as described in claim 2, characterized in that, The locking mechanism includes two locking grooved wheels and a locking rod. The two locking grooved wheels are respectively fixedly installed on the corresponding rotating shaft. Both locking grooved wheels are provided with locking grooves. The locking rod is movably disposed between the two locking grooved wheels. One of the rotating shafts drives the locking groove wheel to rotate, which can push against the locking rod and move it toward another rotating shaft to insert into the corresponding locking groove and restrict the rotation of the corresponding rotating shaft.

4. The bipolar isolation grounding switch as described in claim 3, characterized in that, The locking rod includes an adjusting sub-rod and two locking sub-rods. The two locking sub-rods are respectively installed at both ends of the adjusting sub-rod and can be adjusted along the axial direction of the adjusting sub-rod to increase or decrease the length of the locking rod.

5. The bipolar isolation grounding switch as described in claim 4, characterized in that, Both ends of the adjusting rod are provided with threaded sections, and the two locking rods are respectively threaded to the corresponding threaded sections. Both threaded sections are also threaded with anti-loosening nuts, which abut against the corresponding locking rods.

6. The bipolar isolation grounding switch as described in claim 3, characterized in that, The mounting bracket has two fixing blocks spaced apart along the length of the locking rod. Both fixing blocks have through holes. The locking rod has two mating parts spaced apart along its length. The two ends of the locking rod pass through the corresponding through holes and slide against the corresponding locking groove wheel. An elastic element is also elastically installed between each mating part and the fixing block on the corresponding side.

7. The bipolar isolation grounding switch as described in claim 2, characterized in that, Each of the power sources includes a drive component and a worm gear reducer, wherein the drive component is connected to the rotating shaft via the worm gear reducer.

8. The bipolar isolation grounding switch as described in claim 7, characterized in that, The rotating shaft is provided with a plug slot, the output shaft of the worm gear reducer is provided with a plug block, the power source is detachably installed on the mounting bracket, and when the power source is installed on the mounting bracket, the plug block is plugged into the plug slot.

9. The bipolar isolation grounding switch as described in claim 8, characterized in that, The bipolar isolation grounding switch also includes two detectors, which are respectively installed on the worm gear reducers of the two drive components to detect the state of the output shaft of the corresponding worm gear reducer, so as to determine the opening and closing state of the first moving contact and the second moving contact respectively. Each of the detectors further controls the circuit switching of the drive assembly on which the other detector is installed, based on the detection result.

10. The bipolar isolation grounding switch as described in claim 2, characterized in that, The bipolar isolation grounding switch also includes two auxiliary switches, which are respectively fixed on one side of the two rotating shafts. The contacts of the auxiliary switches are used to control the working state of the power source and detect the opening and closing state of the first moving contact and the second moving contact. A cam is provided on the rotating shaft to trigger the auxiliary switches.

11. The bipolar isolation grounding switch as described in claim 1, characterized in that, The mounting bracket has a mounting plane. The first stationary contact, the second stationary contact, and the third stationary contact each include a mounting base, a contact piece, and a fastener. The mounting base is fixedly mounted on the mounting bracket, and the contact piece is fixedly mounted on the mounting base by the fastener and is perpendicular to the mounting plane.

12. The bipolar isolation grounding switch as described in claim 11, characterized in that, Each of the mounting bases includes two clamping plates, with clamping surfaces on one side of each clamping plate facing each other. The two opposite sides of the contact piece abut against the clamping surfaces of the two clamping plates respectively, and are fixedly connected to the two clamping plates respectively by the fasteners.

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