Low voltage three-phase four-wire grounding device

Abstract

The application discloses a low-voltage three-phase four-wire grounding device, which comprises an insulating base, a load connecting assembly, a ground wire connecting assembly and a knife switch assembly; the load connecting assembly, the knife switch assembly and the ground wire connecting assembly are sequentially arranged on the insulating base along the width direction of the insulating base; the knife switch assembly is hinged to the insulating base, and the knife switch assembly has at least four load ends, at least four grounding ends and at least four main line ends for electrically connecting with main lines; when the load ends are electrically connected with loads through the corresponding load connecting assembly, the grounding ends are separated from the ground wire connecting assembly, and the loads are electrically connected with the main lines; when the grounding ends are connected with the ground wire through the corresponding ground wire connecting assembly, the load ends are separated from the load connecting assembly, and the main lines are electrically connected with the ground wire. The application can realize quick grounding of a line under the condition of ensuring the safety of personnel to the greatest extent.

Description

Technical Field

[0001] This invention relates to the field of power equipment maintenance technology, and in particular to a low-voltage three-phase four-wire grounding device. Background Technology

[0002] With the continuous advancement of power grid construction, the requirements for power supply stability and reliability are becoming increasingly stringent. Currently, during maintenance of some distribution network areas, rapid and reliable grounding is required. However, the current method of using grounding wires is inefficient and time-consuming. The reliability of the grounding is affected by the tightness of the clamps. Furthermore, when restoring power after maintenance, each grounding wire clamp must be removed individually, making the process cumbersome and inefficient. A proper grounding procedure involves: before attaching the grounding wire, workers must use a set of grounding rods to perform a voltage test before attaching the grounding wire to the conductor or grounding ring. The grounding rods are then secured to the conductor using grounding clamps to complete the grounding process.

[0003] To address the aforementioned issues, Chinese patent document application number 202010462320.4 discloses an automatically controlled contact wire grounding device and its control method. This device achieves automatic grounding through the automatic control of structures such as an electric push rod, a grounding metal plate, and a rail, solving the problems of workers manually grounding while the wire is energized, high-voltage intrusion into the line, and high workload inherent in existing technologies. However, the applicability of this device is limited, and it cannot achieve simultaneous grounding of multiple conductors. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a low-voltage three-phase four-wire grounding device to overcome the problem that multiple main lines cannot be grounded at the same time in the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A low-voltage three-phase four-wire grounding device includes an insulating base, a load connection assembly, a ground wire connection assembly, and a disconnector assembly;

[0007] The load connection assembly, the disconnector assembly, and the ground connection assembly are sequentially arranged on the insulating base along the width direction of the insulating base;

[0008] The disconnector assembly is hinged to the insulating base, and the disconnector assembly has at least four load terminals, at least four ground terminals, and at least four mainline terminals for electrical connection with the mainline.

[0009] When the load terminal is electrically connected to the load through the corresponding load connection component, the ground terminal is separated from the ground wire connection component, and the load is electrically connected to the main line;

[0010] When the grounding terminal is connected to the ground wire through the corresponding ground wire connection component, the load terminal is separated from the load connection component, and the main line is electrically connected to the ground wire.

[0011] The beneficial effects of this invention are as follows: By setting up a disconnector assembly and controlling its reciprocating swing between the load connection assembly and the ground connection assembly, the main line is connected to either the load connection assembly or the ground connection assembly via the disconnector assembly. This facilitates switching between different connection relationships under different conditions. Furthermore, the disconnector assembly has at least four grounding terminals, load terminals, and main line terminals, enabling simultaneous switching of connection states for multiple lines. The load connection assembly is used for electrical connection to the load. When the load terminal of the disconnector assembly is connected to the load connection assembly, personnel can use the disconnector to verify the voltage to ensure the load is not energized, thus enabling rapid connection of the load to the ground wire and ensuring the safety of the grounding process. In addition, the low-voltage three-phase four-wire grounding device of this invention is applicable to a wider range of scenarios. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a low-voltage three-phase four-wire grounding device according to the present invention. Figure 1 ;

[0013] Figure 2 This is a schematic diagram of the structure of a low-voltage three-phase four-wire grounding device according to the present invention. Figure 2 ;

[0014] Figure 3 for Figure 2 The left view;

[0015] Figure 4 for Figure 2 Enlarged view of section A;

[0016] Figure 5 This is a schematic diagram of the reversing limiting component in this invention;

[0017] Figure 6 for Figure 5 The front view.

[0018] Label Explanation:

[0019] 1. Insulating base;

[0020] 2. Load connection assembly; 21. Load insulator; 22. First conductive base; 23. Load connection base;

[0021] 3. Grounding connection assembly; 31. Grounding insulator; 32. Second conductive base; 33. Grounding connection base;

[0022] 4. Disconnector assembly; 41. Reversing assembly; 411. Connecting rod; 412. Insulator; 42. Main line connector; 43. Disconnector insulator; 44. Disconnector clamp; 441. First clamp; 442. Second clamp; 45. Main line conductive component; 46. Conductive connector; 401. Load end; 402. Grounding end; 403. Main line end;

[0023] 5. Reversing limit assembly; 51. Fixed base; 52. Gear shift assembly; 521. First limit end; 522. Second limit end; 523. Gear shift fork; 524. Cam; 525. First limit assembly; 5251. Rotating shaft; 5252. Limiting element; 5253. Spring; 526. Second limit assembly; 53. Ratchet; 54. Rotating rod; 55. Protective cover; 56. Limiting post. Detailed Implementation

[0024] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0025] Please refer to Figures 1-6 A low-voltage three-phase four-wire grounding device includes an insulating base 1, a load connection assembly 2, a ground wire connection assembly 3, and a knife switch assembly 4;

[0026] The load connection assembly 2, the disconnector assembly 4, and the ground connection assembly 3 are sequentially arranged on the insulating base 1 along the width direction of the insulating base 1;

[0027] The disconnector assembly 4 is hinged to the insulating base 1, and the disconnector assembly 4 has at least four load terminals 401, at least four ground terminals 402 and at least four main line terminals 403 for electrical connection with the main line;

[0028] When the load terminal 401 is electrically connected to the load through the corresponding load connection component 2, the ground terminal 402 is separated from the ground wire connection component 3, and the load is electrically connected to the main line.

[0029] When the grounding terminal 402 is connected to the ground wire through the corresponding ground wire connection component 3, the load terminal 401 is separated from the load connection component 2, and the main line is electrically connected to the ground wire.

[0030] The working principle of this invention is as follows: the main line is electrically connected to the disconnector assembly, the load is electrically connected to the load connection assembly, and the ground wire is electrically connected to the ground connection assembly. By switching the connection state of the disconnector assembly with the load connection assembly and the ground connection assembly, the main line can be connected to the load or the ground wire under different working states.

[0031] As described above, the beneficial effects of this invention are as follows: By setting up a disconnector assembly and controlling its reciprocating swing between the load connection assembly and the ground connection assembly, the main line is connected to either the load connection assembly or the ground connection assembly via the disconnector assembly. This facilitates switching between different connection relationships under different conditions. Furthermore, the disconnector assembly has at least four grounding terminals, load terminals, and main line terminals, enabling simultaneous switching of connection states for multiple lines. The load connection assembly is used for electrical connection to the load. When the load terminal of the disconnector assembly is connected to the load connection assembly, personnel can use the disconnector to verify the voltage to ensure the load is not energized, thus enabling rapid connection of the load to the ground wire and ensuring the safety of the grounding process. In addition, the low-voltage three-phase four-wire grounding device of this invention is applicable to a wider range of scenarios.

[0032] Furthermore, the disconnector assembly 4 includes a reversing assembly 41, at least four main line connectors 42, at least four disconnector insulators 43, and at least four disconnector clamps 44;

[0033] The main conductor 45 is installed inside the knife switch insulator 43;

[0034] The commutation assembly 41 has at least four insulators 412 connected in sequence;

[0035] One end of the knife switch insulator 43 is hinged to the insulating base 1 through the main line connecting seat 42, and the insulator 412 is connected to the other end of the knife switch insulator 43 through the knife switch clamp 44;

[0036] The knife switch clamp 44 is electrically connected to the main line connector 42 via the main line conductive component 45;

[0037] The main line end 403 is located on the main line connection seat 42, the load end 401 and the grounding end 402 are located at the two ends of the knife switch clamp 44 respectively, and the knife switch clamp 44 is connected to the load connection component 2 or the ground wire connection component 3 when it swings with the knife switch insulator 43.

[0038] As described above, the main line connector is electrically connected to the disconnector clamp via the main line conductive component, allowing the disconnector clamp to switch the connection between the main line, load, and ground wire as the disconnector insulator swings. This facilitates voltage testing and grounding operations, reduces operational difficulty, and, due to the disconnector insulator and insulating base, reduces the operational risks for workers.

[0039] Furthermore, the commutation assembly 41 includes a connecting rod 411 and an insulator 412;

[0040] The insulator 412 is connected to the connecting rod 411, and the insulator 412 is evenly distributed along the axial direction of the connecting rod 411.

[0041] As described above, the connecting rod and insulator are designed to simultaneously control multiple disconnector clamps on the disconnector assembly to perform reversing, enabling simultaneous state switching of multiple main lines, reducing operational difficulty, and improving operational efficiency. Furthermore, the insulator provides insulation protection, ensuring the personal safety of personnel operating the connecting rod for reversing.

[0042] Furthermore, the knife switch clamp 44 includes a first clamping piece 441 and a second clamping piece 442 disposed opposite to the first clamping piece 441;

[0043] The insulator 412 is sandwiched between the first clip 441 and the second clip 442, and the ends of the first clip 441 and the second clip 442 near the knife switch insulator 43 are connected to the knife switch insulator 43 through a conductive connector 46.

[0044] As described above, the first and second clips are used to clamp the insulator between the two clips, thereby improving the connection tightness between the switch assembly and the commutation assembly.

[0045] Furthermore, it also includes a reversing limit assembly 5 that is connected to the knife switch assembly 4 for transmission;

[0046] The reversing limit component 5 is installed along the length of the insulating base 1 through the hinge point between the knife switch assembly 4 and the insulating base 1, and is used to keep the knife switch assembly 4 connected to the load connection component 2 or the ground connection component 3.

[0047] As described above, the reversing limit component is designed to keep the switch assembly connected to the load connection assembly or the ground connection assembly, preventing accidental contact with the reversing assembly during operation and thus avoiding safety accidents.

[0048] Furthermore, the reversing limit assembly 5 includes a fixed base 51, a shifting assembly 52, a ratchet 53, and a rotating rod 54;

[0049] The ratchet 53 is connected to the rotating rod 54 in a transmission manner. The rotating rod 54 passes through the side wall of the fixed seat 51 and the insulating base 1 and is connected to the knife switch assembly 4 in a transmission manner.

[0050] The shift assembly 52 has a first limiting end 521 and a second limiting end 522;

[0051] When the first limit end 521 abuts against the ratchet 53 and the load end 401 is close to the load connection assembly 2, the knife switch assembly 4 can only swing toward the side where the load connection assembly 2 is located.

[0052] When the second limit end 522 abuts against the ratchet 53 and the load end 401 is close to the load connection component 2, the knife switch component 4 can swing toward the side where the ground connection component 3 is located.

[0053] As described above, by switching the shifting assembly, the first or second limit end can limit the ratchet, thereby locking the knife switch assembly. This ensures that the knife switch assembly remains connected to one of the connecting components, preventing misoperation and ensuring the personal safety of the personnel.

[0054] Furthermore, the shift assembly 52 includes a shift fork 523, a cam 524, a first limiting assembly 525, and a second limiting assembly 526;

[0055] The shift fork 523 is drivenly connected to the cam 524 and hinged to the fixed seat 51. The cam 524 is located between the first limiting component 525 and the second limiting component 526.

[0056] One end of the first limiting component 525 and the second limiting component 526 are respectively hinged to the fixed base 51, and the other end of the first limiting component 525 and the second limiting component 526 can press against the ratchet 53.

[0057] When the cam 524 presses against the first limiting component 525, the first limiting component 525 separates from the ratchet 53, and the second limiting component 526 presses against the ratchet 53, so that the ratchet 53 can only rotate clockwise.

[0058] As described above, the shift fork drives the cam to rotate, which in turn causes the cam to switch the pressing relationship between the first limit component and the second limit component, thereby achieving unidirectional limiting of the ratchet and ensuring the stability of the knife switch assembly when locked.

[0059] Furthermore, the first limiting assembly 525 includes a rotating shaft 5251, a limiting member 5252, and a spring 5253;

[0060] One end of the limiting member 5252 is hinged to the fixed seat 51 via the rotating shaft 5251, and the other end of the limiting member 5252 can abut against the ratchet 53;

[0061] The mounting base 51 is covered with a protective cover 55.

[0062] Spring 5253 is sandwiched between the side wall of protective cover 55 and first limiting member 5252, and spring 5253 is connected to the end of first limiting member 5252 away from the rotating shaft 5251, for pushing first limiting member 5252 against ratchet 53.

[0063] As described above, the spring is used to push the limiting component to reset, thereby improving reliability.

[0064] Furthermore, the load connection assembly 2 includes a load insulator 21, a first conductive base 22, a load conductive element, and a load connection base 23 for electrical connection with the load conductor;

[0065] The first conductive base 22 and the load connection base 23 are respectively connected to both ends of the load insulator 21, and the load conductive element 23 is disposed inside the load insulator 21;

[0066] The load connector 23 is electrically connected to the first conductive connector 22 through a load conductive element, and the first conductive connector 22 can be connected to the load end 401.

[0067] As described above, the first conductive base is used to connect with the knife switch clamp, while the load connecting base is used to assemble the load. Thus, the load is electrically connected to the knife switch clamp in sequence through the load connecting base, the load conductive component, and the first conductive base. The load conductive component is equipped with a load insulator to improve insulation performance.

[0068] Furthermore, the ground wire connection assembly 3 includes a ground wire insulator 31, a second conductive base 32, and a ground wire connection base 33 for electrical connection with the ground wire;

[0069] The second conductive base 32 and the ground wire connection base 33 are respectively connected to both ends of the ground wire insulator 31, and the ground wire conductive component is disposed inside the ground wire insulator 31;

[0070] The grounding connector 33 is electrically connected to the second conductive connector 32 through a grounding conductive element, and the second conductive connector 32 can be connected to the grounding terminal.

[0071] As described above, the second conductive base is used to connect with the knife switch clamp, while the ground wire connection base is used to assemble the ground wire. Thus, the ground wire is electrically connected to the knife switch clamp in sequence through the ground wire connection base, the ground wire conductive component, and the second conductive base. The ground wire conductive component is equipped with a ground wire insulator to improve insulation performance.

[0072] Please refer to Figure 1 Figure 6 Embodiment 1 of the present invention is as follows:

[0073] A low-voltage three-phase four-wire grounding device includes an insulating base 1, a load connection assembly 2, a ground wire connection assembly 3, and a disconnector assembly 4. The load connection assembly 2, the disconnector assembly 4, and the ground wire connection assembly 3 are sequentially arranged on the insulating base 1 along its width direction. The disconnector assembly 4 is hinged to the insulating base 1 and has at least four load terminals 401, at least four ground terminals 402, and at least four main line terminals 403 for electrical connection with the main line. When a load terminal 401 is electrically connected to a load through a corresponding load connection assembly 2, the ground terminal 402 is separated from the ground wire connection assembly 3, and the load is electrically connected to the main line. When a ground terminal 402 is connected to a ground wire through a corresponding ground wire connection assembly 3, the load terminal 401 is separated from the load connection assembly 2, and the main line is electrically connected to the ground wire.

[0074] In this embodiment, the disconnector assembly 4 includes a commutation assembly 41, at least four main line connectors 42, at least four disconnector insulators 43, and at least four disconnector clamps 44. A main line conductor 45 is installed inside each disconnector insulator 43. The commutation assembly 41 has at least four insulators 42 connected in sequence. One end of each disconnector insulator 43 is hinged to an insulating base 1 via a main line connector 42, and the insulator 42 is connected to the other end of the disconnector insulator 43 via a disconnector clamp 44. The disconnector clamp 44 is electrically connected to the main line connector 42 via the main line conductor 45. The main line end 403 is located on the main line connector 42, and the load end 401 and ground end 402 are located at opposite ends of the disconnector clamp 44. The disconnector clamp 44 connects to the load connection assembly 2 or the ground connection assembly 3 when it swings with the disconnector insulator 43. Preferably, four main line connectors 42, four disconnector insulators 43, and four disconnector clamps 44 are provided.

[0075] In this embodiment, the commutation assembly 41 includes a connecting rod 41 and an insulator 42; the insulator 42 is connected to the connecting rod 41 and is uniformly distributed along the axial direction of the connecting rod 41.

[0076] In this embodiment, the switch clamp 44 includes a first clamping piece 441 and a second clamping piece 442 disposed opposite to the first clamping piece 441; an insulator 42 is clamped between the first clamping piece 441 and the second clamping piece 442, and the ends of the first clamping piece 441 and the second clamping piece 442 near the switch insulator 43 are connected to the switch insulator 43 through a conductive connector 46. Preferably, both the first clamping piece 441 and the second clamping piece 442 are V-shaped, so that the switch clamp 44 is also V-shaped, so that the switch clamp 44 fits its swing amplitude, thereby enabling rapid switching of the connection relationship between the switch assembly 4 and the load connection assembly 2, realizing rapid on / off control of the line. Specifically, the conductive connector 46 and both ends of the insulator 42 are respectively bolted to the switch clamp 44, and the connection point of the conductive connector 46 is located between the two ends of the insulator 42.

[0077] In this embodiment, a reversing limit component 5 is also included, which is connected to the knife switch assembly 4 in a driving manner. The reversing limit component 5 is provided through the hinge point between the knife switch assembly 4 and the insulating base 1 along the length direction of the insulating base 1, and is used to keep the knife switch assembly 4 connected to the load connection component 2 or the ground connection component 3.

[0078] In this embodiment, the reversing limiting assembly 5 includes a fixed base 51, a shifting assembly 52, a ratchet 53, and a rotating rod 54. The ratchet 53 is drivenly connected to the rotating rod 54 so that by synchronizing the rotation of the ratchet 53 and the rotating rod 54, the rotating rod 54 passes through the side wall of the fixed base 51 and the insulating base 1 and is drivenly connected to the knife switch assembly 4. The shifting assembly 52 has a first limiting end 521 and a second limiting end 522. When the first limiting end 521 abuts against the ratchet 53 and the load end 401 is close to the load connection assembly 2, the knife switch assembly 4 can only swing towards the side where the load connection assembly 2 is located. When the second limiting end 522 abuts against the ratchet 53 and the load end 401 is close to the load connection assembly 2, the knife switch assembly 4 can swing towards the side where the ground connection assembly 3 is located. The rotating rod 54 passes through the lower end of the four main conductive elements 45 in sequence and is connected to the main conductive elements 45 in a transmission manner, so that the rotation of the main conductive elements 45 is restricted by the rotating rod 54, and a limiting post 56 with a diameter larger than the rotating rod 54 is provided at the end of the rotating rod 54 away from the ratchet 53.

[0079] In this embodiment, the shift assembly 52 includes a shift fork 523, a cam 524, a first limiting assembly 525, and a second limiting assembly 526. The shift fork 523 is convexly connected to the cam 524 and hinged to the fixed seat 51. The cam 524 is located between the first limiting assembly 525 and the second limiting assembly 526. One end of the first limiting assembly 525 and the second limiting assembly 526 are respectively hinged to the fixed seat 51, and the other end of the first limiting assembly 525 and the second limiting assembly 526 can press against the ratchet 53. When the cam 524 presses against the first limiting assembly 525, the first limiting assembly 525 separates from the ratchet 53, and the second limiting assembly 526 presses against the ratchet 53, so that the ratchet 53 can only rotate clockwise. When the cam 524 presses against the second limiting assembly 526, the first limiting member 5252 separates from the ratchet 53, and at this time the ratchet 53 can only rotate counterclockwise. Therefore, the swing direction of the shift fork 523 is determined according to the actual connection position of the knife switch assembly 4.

[0080] The working principle of the shift assembly 52 is as follows: Before the knife brake assembly 4 swings toward the load connection assembly 2, the shift fork 523 should swing toward the side where the ground connection assembly 3 is located, so that the cam 524 presses against the second limit assembly 526, thereby allowing the ratchet 53 and the rotating rod 54 to rotate counterclockwise with the knife brake assembly 4. After the knife brake assembly 4 is connected to the load connection assembly 2, the shift fork 523 should swing toward the side where the load connection assembly 2 is located, so that the cam 524 presses against the first limit assembly 525, preventing the ratchet 53 from rotating clockwise, thereby preventing the knife brake assembly 4 from swinging clockwise and maintaining the connection.

[0081] In this embodiment, the first limiting component 525 includes a rotating shaft 5251, a limiting member 5252, and a spring 5253. One end of the limiting member 5252 is hinged to the fixed base 51 via the rotating shaft 5251, and the other end of the limiting member 5252 can abut against the ratchet 53. The fixed base 51 is covered with a protective cover 55. The spring 5253 is sandwiched between the side wall of the protective cover 55 and the first limiting member 5252, and the spring 5253 is connected to the end of the first limiting member 5252 away from the rotating shaft 5251, for pushing the first limiting member 5252 against the ratchet 53. The structure of the second limiting component 526 is the same as that of the first limiting component 525, and will not be described again here.

[0082] In this embodiment, the load connection assembly 2 includes four load insulators 21, four first conductive seats 22, four load conductive elements, and four load connection seats 23 for electrical connection with load wires; the first conductive seats 22 and the load connection seats 23 are respectively connected to the two ends of the load insulators 21, and the load conductive elements are disposed inside the load insulators 21; the load connection seats 23 are electrically connected to the first conductive seats 22 through the load conductive elements, and the first conductive seats 22 can be connected to the load end 401.

[0083] In this embodiment, the ground wire connection assembly 3 includes four ground wire insulators 31, four second conductive seats 32, four ground wire conductive elements, and four ground wire connection seats 33 for electrical connection with the ground wire; the second conductive seats 32 and the ground wire connection seats 33 are respectively connected to both ends of the ground wire insulators 31, and the ground wire conductive elements are disposed inside the ground wire insulators 31; the ground wire connection seats 33 are electrically connected to the second conductive seats 32 through the ground wire conductive elements, and the first conductive seat 22 can be connected to the grounding terminal 402.

[0084] The working process of this invention is as follows:

[0085] Fix this device to the pole or tower that needs to be inspected and connected to the grounding wire;

[0086] The shift fork 523 is moved to the side where the ground connection component 3 is located. The shift component connects the load end 401 of the knife switch component 4 to the load connection component 2, and the shift fork 523 is moved to the side where the load connection component 2 is located, thereby keeping the load end 401 of the knife switch component 4 connected to the load connection component 2.

[0087] Four wires are drawn from the main line. Similarly, four connecting wires are drawn from the load. The wires drawn from the main line and the load connecting wires are connected to the lower end of the corresponding main line connector 42 and the lower end of the load connector 23 by means of copper lugs and bolts.

[0088] For lines that need to be inspected or maintained, perform an electrical test. After ensuring that there is no power at the load end, connect the ground wire to the lower end of the ground wire connector 33 through a copper lug and a bolt.

[0089] After performing the voltage test again, and under the premise of ensuring safety, the shift fork 523 is reversed. The shift assembly 52 drives the knife switch assembly 4 to reverse, so that the grounding terminal 402 of the knife switch assembly 4 is connected to the ground wire connection assembly 3 to complete the grounding. The shift fork 523 is reversed so that the ground wire connection assembly 3 and the knife switch assembly 4 remain connected.

[0090] After the inspection or maintenance work is completed, the power is tested again. Under the premise of ensuring safety, the shift fork 523 is reversed, and the shift assembly drives the knife switch assembly 4 to reverse, so that the load end 401 of the knife switch assembly 4 is connected to the load connection assembly 2, and the power is supplied.

[0091] In summary, the low-voltage three-phase four-wire grounding device provided by this invention changes the traditional grounding operation method, realizes rapid switching of the connection relationship between the main line and the load and the ground wire, and can realize rapid voltage detection and rapid grounding, reducing the difficulty of operation, shortening the grounding time, shortening the maintenance time to a certain extent, and thus shortening the power outage time. At the same time, due to the setting of the reversing limit component, the connection relationship of the knife switch component can be maintained, further improving safety and ensuring the personal safety of the workers during operation.

[0092] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A low-voltage three-phase four-wire grounding device, characterized in that, Includes an insulating base, load connection assembly, grounding connection assembly, and disconnector assembly; The load connection assembly, the disconnector assembly, and the ground connection assembly are sequentially arranged on the insulating base along the width direction of the insulating base; The disconnector assembly is hinged to the insulating base, and the disconnector assembly has at least four load terminals, at least four ground terminals, and at least four mainline terminals for electrical connection with the mainline. When the load terminal is electrically connected to the load through the corresponding load connection component, the ground terminal is separated from the ground wire connection component, and the load is electrically connected to the main line; When the grounding terminal is connected to the ground wire through the corresponding ground wire connection component, the load terminal is separated from the load connection component, and the main line is electrically connected to the ground wire; It also includes a reversing limit component that is drivenly connected to the knife switch assembly; The reversing limiting component is provided along the length direction of the insulating base through the hinge point between the knife switch assembly and the insulating base, and is used to keep the knife switch assembly connected to the load connection assembly or the ground connection assembly; The reversing limit assembly includes a fixed base, a shifting assembly, a ratchet, and a rotating rod; The ratchet is motive-connected to the rotating rod, which passes through the sidewalls of the fixed base and the insulating base and is motive-connected to the knife switch assembly. The shifting assembly has a first limiting end and a second limiting end; When the first limiting end abuts against the ratchet and the load end is close to the load connection assembly, the knife switch assembly can only swing toward the side where the load connection assembly is located; When the second limiting end abuts against the ratchet and the load end is close to the load connection assembly, the knife switch assembly can swing toward the side where the ground connection assembly is located.

2. The low-voltage three-phase four-wire grounding device according to claim 1, characterized in that, The disconnector assembly includes a commutation component, at least four main line connectors, at least four disconnector insulators, and at least four disconnector clamps; The disconnector insulator is equipped with a main conductor. The commutation assembly has at least four insulators connected in sequence; One end of the disconnector insulator is hinged to the insulating base via the main line connector, and the insulator is connected to the other end of the disconnector insulator via the disconnector clamp; The disconnect clamp is electrically connected to the main line connector via the main line conductive component; The main line end is located on the main line connector, the load end and the grounding end are respectively located at the two ends of the disconnect clamp, and the disconnect clamp is connected to the load connection assembly or the ground connection assembly when the disconnect insulator swings.

3. A low-voltage three-phase four-wire grounding device according to claim 2, characterized in that, The commutation assembly includes a connecting rod and the insulator; The insulator is connected to the connecting rod, and the insulator is evenly distributed along the axial direction of the connecting rod.

4. A low-voltage three-phase four-wire grounding device according to claim 2, characterized in that, The knife switch clamp includes a first clamping piece and a second clamping piece disposed opposite to the first clamping piece; The insulator is sandwiched between the first clip and the second clip, and the ends of the first clip and the second clip near the knife switch insulator are connected to the knife switch insulator through a conductive connector.

5. A low-voltage three-phase four-wire grounding device according to claim 1, characterized in that, The shifting assembly includes a shift fork, a cam, a first limiting assembly, and a second limiting assembly; The shift fork is connected to the cam drive and hinged to the fixed seat, and the cam is located between the first limiting component and the second limiting component; One end of the first limiting component and the second limiting component are respectively hinged to the fixed base, and the other end of the first limiting component and the second limiting component can press against the ratchet; When the cam presses against the first limiting component, the first limiting component separates from the ratchet, and the second limiting component presses against the ratchet, so that the ratchet can only rotate clockwise.

6. A low-voltage three-phase four-wire grounding device according to claim 5, characterized in that, The first limiting component includes a rotating shaft, a limiting member, and a spring; One end of the limiting member is hinged to the fixed seat via the rotating shaft, and the other end of the limiting member can abut against the ratchet; The outer cover of the fixed base is equipped with a protective cover; The spring is sandwiched between the side wall of the protective cover and the limiting member, and the spring is connected to the end of the limiting member away from the rotating shaft, for pushing the limiting member against the ratchet.

7. A low-voltage three-phase four-wire grounding device according to claim 1, characterized in that, The load connection assembly includes a load insulator, a first conductive base, a load conductive element, and a load connection base for electrical connection with the load. The first conductive base and the load connection base are respectively connected to both ends of the load insulator, and the load conductive element is disposed inside the load insulator; The load connector is electrically connected to the first conductive base via the load conductive element, and the first conductive base can be connected to the load end.

8. A low-voltage three-phase four-wire grounding device according to claim 1, characterized in that, The ground wire connection assembly includes a ground wire insulator, a second conductive base, a ground wire conductive element, and a ground wire connection base for electrical connection with the ground wire. The second conductive base and the ground wire connection base are respectively connected to both ends of the ground wire insulator, and the ground wire conductive element is disposed inside the ground wire insulator; The grounding connector is electrically connected to the second conductive base via the grounding conductor, and the second conductive base can be connected to the grounding terminal.

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