Explosion-proof bus coupler isolation device for mine
The design of the explosion-proof bus tie isolation device for mines ensures the safety and reliability of underground power supply equipment. It solves the safety hazards and circuit complexity problems of the double bus tie parallel cabinet method during maintenance, and provides a simple circuit structure and obvious disconnection point to ensure the safety of underground operations.
Patent Information
- Application Number
- CN202522146648.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-11
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-10-11
AI Technical Summary
In existing underground power supply equipment, the double busbar parallel cabinet method poses safety hazards during maintenance, and the circuit is complex and inconvenient to operate.
The mine explosion-proof bus tie isolation device is adopted. Through the positive connection between phases, the bus tie cabinet and the isolation cabinet work together to achieve simple circuit and safe isolation. It includes the design of the parallel cabinet, bus tie cabinet, isolation cabinet, three-phase copper busbar assembly, circuit breaker trolley and isolation trolley.
To ensure the reliability of underground power supply, eliminate safety risks in operation, maintenance and fault handling, provide clear disconnection points, simplify circuit structure and improve operational safety.
Smart Images
Figure CN224935187U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of underground power supply equipment, and in particular to a mine explosion-proof busbar isolation device. Background Technology
[0002] The explosion-proof and intrinsically safe bus tie-type explosion-proof device for mining is designed to facilitate safe operation by underground workers. Its main function is to provide a clear disconnect point during maintenance, ensuring worker safety without affecting other circuits. The isolation cabinet does not contain a circuit breaker and cannot be operated under load; it serves as an isolation element in the circuit.
[0003] Currently, underground power supply equipment uses a double busbar parallel cabinet. This type of parallel cabinet has a safety hazard because the circuit is live during maintenance. The AC phases of the two cabinets are opposite, and the copper busbars need to be flipped when connecting the two cabinets, which makes the circuit complex. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this utility model provides a mine explosion-proof bus tie isolation device. It features a forward connection between phases, a simple circuit, and coordinated operation between the bus tie cabinet and the isolation cabinet. This ensures the reliability of underground power supply while eliminating safety risks during operation, maintenance, and fault handling. The technical solution adopted by this utility model is as follows: A mine explosion-proof busbar isolation device, comprising: And cabinet tube; The bus tie cabinet has one end of the parallel cabinet tube connected to the side of the bus tie cabinet, and the bus tie cabinet is equipped with a first three-phase integrated stationary contact. An isolation cabinet, with the other end of the parallel cabinet tube connected to the side of the isolation cabinet, and a second three-phase integrated stationary contact is provided inside the isolation cabinet; The three-phase copper busbar assembly passes through the parallel cabinet tube and extends into the busbar cabinet and the isolation cabinet at both ends, including A-phase connecting copper busbar, B-phase connecting copper busbar and C-phase connecting copper busbar that are parallel to each other and staggered at their ends; The first soft connection group connects the A-phase connecting copper busbar, the B-phase connecting copper busbar, and the C-phase connecting copper busbar to the first A-phase stationary contact, the first B-phase stationary contact, and the first C-phase stationary contact of the first three-phase integrated stationary contact, respectively. The second soft connection group connects the A-phase connecting copper busbar, B-phase connecting copper busbar, and C-phase connecting copper busbar to the second A-phase stationary contact, the second B-phase stationary contact, and the second C-phase stationary contact of the second three-phase integrated stationary contact respectively. The circuit breaker trolley is slidably installed inside the bus tie cabinet so that the moving contact of the circuit breaker on the circuit breaker trolley is connected to the first three-phase integrated stationary contact. The isolation trolley is slidably installed inside the isolation cabinet so that the isolation moving contact on the isolation trolley is connected to the second three-phase integrated stationary contact.
[0005] Furthermore, the three-phase copper busbar assembly also includes: An insulating sleeve is used to cover the copper busbars connecting phase A, phase B, and phase C. The ends of the copper busbars connecting phase A, phase B, and phase C are exposed outside the insulating sleeve.
[0006] Furthermore, the insulating sleeve includes: The first insulating part, wherein the A-phase connecting copper busbar passes through the first insulating part; The second insulating part, wherein the B-phase connecting copper busbar passes through the second insulating part; The third insulating part, through which the C-phase connecting copper busbar passes; Steps are formed between the first insulating portion and between the first insulating portion and the third insulating portion, respectively.
[0007] Furthermore, the insulating sleeve is a one-piece molded structure.
[0008] Furthermore, positioning holes are provided at the ends of the A-phase connecting copper busbar, the B-phase connecting copper busbar, and the C-phase connecting copper busbar, respectively.
[0009] Furthermore, the first soft link group includes: The first phase A copper busbar flexible connection has one end connected to the phase A connecting copper busbar and the other end used to connect to the phase A stationary contact in the first three-phase integrated stationary contact in the bus coupler cabinet. The first B-phase copper busbar flexible connection has one end connected to the B-phase connecting copper busbar and the other end used to connect to the B-phase stationary contact in the first three-phase integrated stationary contact in the bus coupler cabinet. The first C-phase copper busbar flexible connection has one end connected to the C-phase connecting copper busbar and the other end used to connect to the C-phase stationary contact in the first three-phase integrated stationary contact in the bus coupler cabinet. The first A-phase copper busbar flexible connection, the first B-phase copper busbar flexible connection, and the first C-phase copper busbar flexible connection are arranged at intervals and are perpendicular to the three-phase copper busbar assembly.
[0010] Furthermore, the second soft link group includes: The second phase A copper busbar flexible connection has one end connected to the phase A connecting copper busbar and the other end used to connect to the phase A stationary contact in the second three-phase integrated stationary contact in the isolation cabinet; The second B-phase copper busbar flexible connection has one end connected to the B-phase connecting copper busbar and the other end used to connect to the B-phase stationary contact in the second three-phase integrated stationary contact in the isolation cabinet. The second C-phase copper busbar flexible connection has one end connected to the C-phase connecting copper busbar and the other end used to connect to the C-phase stationary contact in the second three-phase integrated stationary contact in the isolation cabinet; The second phase A copper busbar flexible connection, the second phase B copper busbar flexible connection, and the second phase C copper busbar flexible connection are arranged at intervals and are perpendicular to the three-phase copper busbar assembly.
[0011] Advantages of this utility model: The positive connection between phases in the two cabinets is achieved by the three-phase copper busbar assembly passing directly horizontally through the cabinet tube and connecting the stationary contacts in the two cabinets with two flexible connection groups. The copper busbar does not need to be bent and flipped multiple times, and the circuit is simple. The three-phase connecting copper busbars are assembled on a single insulating sleeve, allowing the three-phase copper busbar assembly to be disassembled and reassembled as a whole, facilitating production and transportation. The bus tie cabinet is responsible for "connection and switching of power supply circuits", while the isolation cabinet is responsible for "safety isolation before switching / maintenance". The two work together to ensure the reliability of underground power supply and eliminate safety risks in operation and maintenance and fault handling. They are the core combination of "safety barrier" and "operation control" in the underground explosion-proof power supply system. Attached Figure Description
[0012] Figure 1 This is the assembly drawing for this application.
[0013] Figure 2 This is a top view of this application.
[0014] Figure 3 This is a schematic diagram of the copper busbar connection in this application.
[0015] Figure 4 This is a structural diagram of a three-phase copper busbar assembly.
[0016] Figure 5 This is an electrical schematic diagram for busbar switching.
[0017] In the diagram: 100 - Parallel cabinet, 200 - Bus tie cabinet, 210 - Circuit breaker trolley, 300 - Isolation cabinet, 310 - Isolation trolley, 400 - Three-phase copper busbar assembly, 410 - Insulation sleeve, 411 - First insulation part, 412 - Second insulation part, 413 - Third insulation part, 420 - Phase A connecting copper busbar, 430 - Phase B connecting copper busbar, 440 - Phase C connecting copper busbar, 500 - First flexible connection group, 510 - First Phase A copper busbar flexible connection, 520 - First Phase B copper busbar flexible connection, 530 - First Phase C copper busbar flexible connection, 600 - First three-phase integrated stationary contact, 700 - Second flexible connection group, 710 - Second Phase A copper busbar flexible connection, 720 - Second Phase B copper busbar flexible connection, 730 - Second Phase C copper busbar flexible connection, 800 - Second three-phase integrated stationary contact. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0019] Please see the appendix Figure 1 - Appendix Figure 5 This application provides a mine explosion-proof busbar isolation device, comprising: 100 cabinet tubes; The bus tie cabinet 200 has one end of the parallel cabinet tube 100 connected to the side of the bus tie cabinet 200, and the bus tie cabinet 200 is provided with a first three-phase integrated stationary contact 600. Isolation cabinet 300, the other end of the parallel cabinet tube 100 is connected to the side of the isolation cabinet 300, and a second three-phase integrated stationary contact 800 is provided inside the isolation cabinet 300; A three-phase copper busbar assembly 400 passes through the parallel cabinet tube 100 and extends into the bus coupler cabinet 200 and the isolation cabinet 300 at both ends, including A-phase connecting copper busbar 420, B-phase connecting copper busbar 430 and C-phase connecting copper busbar 440 that are parallel to each other and staggered at their ends. The first soft connection group 500 connects the A-phase connecting copper busbar 420, the B-phase connecting copper busbar 430, and the C-phase connecting copper busbar 440 to the first A-phase stationary contact, the first B-phase stationary contact, and the first C-phase stationary contact on the first three-phase integrated stationary contact 600, respectively. The second soft connection group 700 connects the A-phase connecting copper busbar 420, the B-phase connecting copper busbar 430, and the C-phase connecting copper busbar 440 to the second A-phase stationary contact, the second B-phase stationary contact, and the second C-phase stationary contact on the second three-phase integrated stationary contact 800, respectively. The circuit breaker trolley 210 is slidably disposed within the bus tie cabinet 200 so that the moving contact of the circuit breaker on the circuit breaker trolley 210 is connected to the first three-phase integrated stationary contact 600. The isolation trolley 310 is slidably disposed within the isolation cabinet 300 so that the isolation moving contact on the isolation trolley 310 is connected to the second three-phase integrated stationary contact 800.
[0020] Please see the appendix Figure 2From a top-down view, the sides of the bus tie cabinet 200 and the isolation cabinet 300 have openings for the three-phase copper busbar assembly 400 to pass through. The A, B, and C phase stationary contacts inside the bus tie cabinet 200 are arranged from right to left, and the A, B, and C phase stationary contacts inside the isolation cabinet 300 are also arranged from right to left. The cabinet tube 100 is fixed between the bus tie cabinet 200 and the isolation cabinet 300 using bolts. The three-phase copper busbar assembly 400 is arranged in a straight line. In use, the three-phase copper busbar assembly 400 is inserted into the bus tie cabinet 200. The first flexible connection group 500 connects the A-phase connecting copper busbar 420, the B-phase connecting copper busbar 430, and the C-phase connecting copper busbar 440 to the first A-phase stationary contact, the first B-phase stationary contact, and the first C-phase stationary contact, respectively. The second flexible connection group 700 connects the A-phase connecting copper busbar 420, the B-phase connecting copper busbar 430, and the C-phase connecting copper busbar 440 to the first A-phase stationary contact, the first B-phase stationary contact, and the first C-phase stationary contact, respectively. Phase A connecting copper busbar 430 and phase B connecting copper busbar 440 are respectively connected to the second phase A stationary contact, the second phase B stationary contact, and the second phase C stationary contact, realizing the corresponding connection from phase A in the bus tie cabinet 200 to phase A in the isolation cabinet, from phase B in the bus tie cabinet 200 to phase B in the isolation cabinet, and from phase C in the bus tie cabinet 200 to phase C in the isolation cabinet. By utilizing the staggered ends of phase A connecting copper busbar 420, phase B connecting copper busbar 430, and phase C connecting copper busbar 440, the two ends of phase A connecting copper busbar 420 are directly aligned with the phase A stationary contacts in the two cabinets, the two ends of phase B connecting copper busbar 430 are directly aligned with the phase B stationary contacts in the two cabinets, and the two ends of phase C connecting copper busbar 440 are directly aligned with the phase C stationary contacts in the two cabinets, realizing the forward connection between phases. Compared with the connection method of copper busbar arrangement in flip-box, the circuit is simpler.
[0021] The structure and working principle of the motherboard cabinet and the isolation cabinet have been disclosed in existing technology and will not be repeated here. For details, please refer to the appendix. Figure 2 Appendix Figure 3 and attached Figure 5 During normal operation, the isolating trolley 310 is pushed to the working position, and its moving contact is in close contact with the stationary contact inside the isolating cabinet, thus connecting the isolating cabinet circuit. The circuit breaker trolley 210 is pushed to the working position, and its moving contact is in contact with the stationary contact of the bus tie cabinet. The incoming and outgoing lines of the circuit breaker are connected to the main circuit, and the bus tie circuit breaker is closed. Current flows from one bus section, such as section I, through the isolating cabinet → the bus tie cabinet circuit breaker → to another bus section, such as section II, thus realizing the interconnection of electrical energy between the two bus sections.
[0022] When a short circuit occurs in the bus tie circuit, such as a phase-to-phase short circuit or overload, the protection system, such as a relay protection device or a microprocessor protection device, will quickly detect the fault signal and send a "trip command" to the bus tie circuit breaker. The bus tie circuit breaker will trip instantaneously, its internal contacts will open, and the fault current will be cut off to prevent the fault from spreading to both bus sections. The isolation truck / circuit breaker truck will remain in the working position. Before the fault is cleared, the circuit breaker will remain in the open state, and the two bus sections will achieve "fault isolation" through the bus tie to prevent a fault in one bus section from affecting the normal operation of the other bus section.
[0023] When power outage maintenance is required, the isolating handcart is pulled from the "working position" to the maintenance position. The isolating handcart separates from the stationary contact of the isolating cabinet, forming a visible physical isolation break. Therefore, even if the circuit breaker is accidentally closed due to misoperation, the isolation break can ensure that there is no power on the bus tie cabinet side, avoiding electric shock to personnel.
[0024] The combination of bus tie cabinet 100, isolation cabinet 300, and three-phase copper busbar assembly 400, with the bus tie cabinet responsible for "connection and switching of power supply circuits" and the isolation cabinet responsible for "safety isolation before switching / maintenance", works together to ensure the reliability of underground power supply and eliminate safety risks in operation and maintenance and fault handling. It is the core combination of "safety barrier" and "operation control" in the underground explosion-proof power supply system.
[0025] Please see the appendix Figure 3 and attached Figure 4 To ensure mutual insulation between the three phase connecting copper busbars, the three-phase copper busbar assembly 400 further includes an insulating sleeve 410 that covers the A-phase connecting copper busbar 420, the B-phase connecting copper busbar 430, and the C-phase connecting copper busbar 440. The ends of the A-phase connecting copper busbar 420, the B-phase connecting copper busbar 430, and the C-phase connecting copper busbar 440 are exposed outside the insulating sleeve 410. The three phase connecting copper busbars are assembled on a single insulating sleeve 410, making the three-phase copper busbar assembly 400 a single unit, facilitating production, transportation, and assembly / disassembly.
[0026] In one specific embodiment, both the A-phase connecting copper busbar 420 at the edge of the insulating sleeve 410 and the C-phase connecting copper busbar 440 at the edge of the insulating sleeve 410 are bent away from the B-phase connecting copper busbar 430, thereby increasing the distance between the ends of the A-phase connecting copper busbar 420 and the C-phase connecting copper busbar 440; the increased distance further avoids interference between the two flexible connection groups and the B-phase connecting copper busbar 430 during installation.
[0027] In one embodiment, the insulating sleeve 410 includes a first insulating portion 411, a second insulating portion 412, and a third insulating portion 413; the A-phase connecting copper busbar 420 passes through the first insulating portion 411; the B-phase connecting copper busbar 430 passes through the second insulating portion 412; and the C-phase connecting copper busbar 440 passes through the third insulating portion 413; wherein, steps are formed between the first insulating portions 411 and between the first insulating portions 411 and the third insulating portion 413, respectively. The formed steps ensure that the A-phase connecting copper busbar 420, B-phase connecting copper busbar 430, and C-phase connecting copper busbar 440 are covered as much as possible along their length, leaving only the ends exposed for wiring, thus improving safety.
[0028] In one specific embodiment, the insulating sleeve 410 is a one-piece molded structure. One-piece molded structures are easier to manufacture, and the three-phase copper busbar assembly 400 has better overall integrity and higher structural strength.
[0029] In another specific embodiment, the first insulating part 411, the second insulating part 412, and the third insulating part 413 are bonded and fixed together. The insulating sleeve 410 formed by the separate assembly facilitates the adjustment of the step length, that is, the adjustment of the position of the ends of the A-phase connecting copper busbar 420, the B-phase connecting copper busbar 430, and the C-phase connecting copper busbar 440.
[0030] In this application, in order to realize the bolt connection between the A-phase connecting copper busbar 420, the B-phase connecting copper busbar 430, the C-phase connecting copper busbar 440 and the first flexible connection group 500 and the second flexible connection group 700, positioning holes are respectively provided at the ends of the A-phase connecting copper busbar 420, the B-phase connecting copper busbar 430 and the C-phase connecting copper busbar 440.
[0031] In one embodiment, the first flexible connection group 500 includes a first A-phase copper busbar flexible connection 510, a first B-phase copper busbar flexible connection 520, and a first C-phase copper busbar flexible connection 530; one end of the first A-phase copper busbar flexible connection 510 is connected to the A-phase connecting copper busbar 420, and the other end is used to connect to the A-phase stationary contact in the first three-phase integrated stationary contact 600 inside the bus coupler cabinet 200; one end of the first B-phase copper busbar flexible connection 520 is connected to the B-phase connecting copper busbar 430, and the other end is used to connect to... The first three-phase integrated stationary contact 600 in the bus tie cabinet 200 is connected to the B-phase stationary contact; one end of the first C-phase copper bus flexible connection 530 is connected to the C-phase connecting copper bus 440, and the other end is used to connect to the C-phase stationary contact 600 in the first three-phase integrated stationary contact 600 in the bus tie cabinet 200; wherein, the first A-phase copper bus flexible connection 510, the first B-phase copper bus flexible connection 520, and the first C-phase copper bus flexible connection 530 are arranged at intervals and are perpendicular to the three-phase copper bus assembly 400 respectively.
[0032] As attached Figure 3 As shown, from a top-down perspective, the steps between the first insulating part 411, the second insulating part 412, and the third insulating part 413 enable the spaced installation of the first A-phase copper busbar flexible connection 510, the first B-phase copper busbar flexible connection 520, and the first C-phase copper busbar flexible connection 530. This achieves right-angle transitions between the A-phase stationary contact, the first A-phase copper busbar flexible connection 510, and the A-phase connecting copper busbar 420 in the first three-phase integrated stationary contact 600; right-angle transitions between the B-phase stationary contact, the first B-phase copper busbar flexible connection 520, and the B-phase connecting copper busbar 430 in the first three-phase integrated stationary contact 600; and right-angle transitions between the C-phase stationary contact, the first C-phase copper busbar flexible connection 530, and the C-phase connecting copper busbar 440 in the first three-phase integrated stationary contact 600, further shortening the connection circuit between phases.
[0033] In one specific embodiment, the first A-phase copper busbar flexible connection 510 is connected to the A-phase stationary contact and the A-phase connecting copper busbar 420 by bolts, the first B-phase copper busbar flexible connection 520 is connected to the B-phase stationary contact and the B-phase connecting copper busbar 430 by bolts, and the first C-phase copper busbar flexible connection 530 is connected to the C-phase stationary contact and the C-phase connecting copper busbar 440 by bolts.
[0034] In one embodiment, the second flexible connection group 700 includes a second A-phase copper busbar flexible connection 710, a second B-phase copper busbar flexible connection 720, and a second C-phase copper busbar flexible connection 730; one end of the second A-phase copper busbar flexible connection 710 is connected to the A-phase connecting copper busbar 420, and the other end is used to connect to the A-phase stationary contact in the second three-phase integrated stationary contact 800 inside the isolation cabinet 300; one end of the second B-phase copper busbar flexible connection 720 is connected to the B-phase connecting copper busbar 430, and the other end is used to connect to the A-phase stationary contact in the second three-phase integrated stationary contact 800 inside the isolation cabinet 300. The second three-phase integrated stationary contact 800 inside the isolation cabinet is connected to the B-phase stationary contact; one end of the second C-phase copper busbar flexible connection 730 is connected to the C-phase connecting copper busbar 440, and the other end is used to connect to the C-phase stationary contact in the second three-phase integrated stationary contact 800 inside the isolation cabinet; wherein, the second A-phase copper busbar flexible connection 710, the second B-phase copper busbar flexible connection 720, and the second C-phase copper busbar flexible connection 730 are arranged at intervals and are perpendicular to the three-phase copper busbar assembly 400 respectively.
[0035] As attached Figure 3 As shown, from a top-down perspective, the steps between the first insulating part 411, the second insulating part 412, and the third insulating part 413 enable the spaced installation of the second A-phase copper busbar flexible connection 710, the second B-phase copper busbar flexible connection 720, and the second C-phase copper busbar flexible connection 730. This achieves right-angle transitions between the A-phase stationary contact, the second A-phase copper busbar flexible connection 710, and the A-phase connecting copper busbar 420 in the second three-phase integrated stationary contact 800; right-angle transitions between the B-phase stationary contact, the second B-phase copper busbar flexible connection 720, and the B-phase connecting copper busbar 430 in the second three-phase integrated stationary contact 800; and right-angle transitions between the C-phase stationary contact, the second C-phase copper busbar flexible connection 730, and the C-phase connecting copper busbar 440 in the second three-phase integrated stationary contact 800, further shortening the connection circuit between phases.
[0036] In one specific embodiment, the second A-phase copper busbar flexible connection 710 is connected to the A-phase stationary contact and the A-phase connecting copper busbar 420 by bolts, the second B-phase copper busbar flexible connection 720 is connected to the B-phase stationary contact and the B-phase connecting copper busbar 430 by bolts, and the second C-phase copper busbar flexible connection 730 is connected to the C-phase stationary contact and the C-phase connecting copper busbar 440 by bolts.
[0037] In summary, the mine explosion-proof bus coupler device of this application has the advantages of providing a reliable isolation disconnection point, improving the flexibility of system operation, phase-to-phase positive connection, and simple circuit.
[0038] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A mine explosion-proof busbar isolation device, characterized in that, include: Cabinet tube (100); The bus tie cabinet (200) has one end of the parallel cabinet tube (100) connected to the side of the bus tie cabinet (200), and the bus tie cabinet (200) is provided with a first three-phase integrated stationary contact (600). Isolation cabinet (300), the other end of the parallel cabinet tube (100) is connected to the side of the isolation cabinet (300), and a second three-phase integrated stationary contact (800) is provided inside the isolation cabinet (300). A three-phase copper busbar assembly (400) passes through the parallel cabinet tube (100) and extends into the bus coupler cabinet (200) and the isolation cabinet (300) at both ends, including A-phase connecting copper busbar (420), B-phase connecting copper busbar (430) and C-phase connecting copper busbar (440) that are parallel to each other and staggered at their ends. The first soft connection group (500) connects the A-phase connecting copper busbar (420), B-phase connecting copper busbar (430), and C-phase connecting copper busbar (440) to the first A-phase stationary contact, the first B-phase stationary contact, and the first C-phase stationary contact on the first three-phase integrated stationary contact (600), respectively. The second soft connection group (700) connects the A-phase connecting copper busbar (420), B-phase connecting copper busbar (430), and C-phase connecting copper busbar (440) to the second A-phase stationary contact, the second B-phase stationary contact, and the second C-phase stationary contact on the second three-phase integrated stationary contact (800), respectively. The circuit breaker trolley (210) is slidably disposed in the bus tie cabinet (200) so that the moving contact of the circuit breaker on the circuit breaker trolley (210) is connected to the first three-phase integrated stationary contact (600). The isolation trolley (310) is slidably disposed inside the isolation cabinet (300) so that the isolation moving contact on the isolation trolley (310) is connected to the second three-phase integrated stationary contact (800).
2. The mine explosion-proof busbar isolation device as described in claim 1, characterized in that, The three-phase copper busbar assembly (400) also includes: An insulating sleeve (410) covers the copper busbars (420), (430), and (440) of phase A, phase B, and phase C respectively. The ends of the A-phase connecting copper busbar (420), the B-phase connecting copper busbar (430), and the C-phase connecting copper busbar (440) are exposed outside the insulating sleeve (410).
3. The mine explosion-proof busbar isolation device as described in claim 2, characterized in that, The insulating sleeve (410) includes: The first insulating part (411) is through which the A-phase connecting copper busbar (420) passes. The second insulating part (412) is through which the B-phase connecting copper busbar (430) passes. The third insulating part (413) is through which the C-phase connecting copper busbar (440) passes. Steps are formed between the first insulating part (411) and between the first insulating part (411) and the third insulating part (413).
4. The mine explosion-proof busbar isolation device as described in claim 3, characterized in that: The insulating sleeve (410) is a one-piece molded structure.
5. The mine explosion-proof busbar isolation device as described in claim 2, characterized in that: Positioning holes are provided at the ends of the A-phase connecting copper busbar (420), the B-phase connecting copper busbar (430), and the C-phase connecting copper busbar (440).
6. The mine explosion-proof busbar isolation device as described in any one of claims 1-5, characterized in that, The first soft link group (500) includes: The first A-phase copper busbar flexible connection (510) has one end connected to the A-phase connecting copper busbar (420) and the other end used to connect to the A-phase stationary contact in the first three-phase integrated stationary contact (600) in the bus tie cabinet (200); The first B-phase copper busbar flexible connection (520) has one end connected to the B-phase connecting copper busbar (430) and the other end used to connect to the B-phase stationary contact in the first three-phase integrated stationary contact (600) in the bus tie cabinet (200); The first C-phase copper busbar flexible connection (530) has one end connected to the C-phase connecting copper busbar (440) and the other end used to connect to the C-phase stationary contact in the first three-phase integrated stationary contact (600) in the bus tie cabinet (200); The first A-phase copper busbar flexible connection (510), the first B-phase copper busbar flexible connection (520), and the first C-phase copper busbar flexible connection (530) are arranged at intervals and are perpendicular to the three-phase copper busbar assembly (400).
7. The mine explosion-proof busbar isolation device as described in any one of claims 1-5, characterized in that, The second soft link group (700) includes: The second A-phase copper busbar flexible connection (710) has one end connected to the A-phase connecting copper busbar (420) and the other end used to connect to the A-phase stationary contact in the second three-phase integrated stationary contact (800) inside the isolation cabinet (300); The second B-phase copper busbar flexible connection (720) has one end connected to the B-phase connecting copper busbar (430) and the other end used to connect to the B-phase stationary contact in the second three-phase integrated stationary contact (800) inside the isolation cabinet (300); The second C-phase copper busbar flexible connection (730) has one end connected to the C-phase connecting copper busbar (440) and the other end used to connect to the C-phase stationary contact in the second three-phase integrated stationary contact (800) in the isolation cabinet; The second phase A copper bus flexible connection (710), the second phase B copper bus flexible connection (720), and the second phase C copper bus flexible connection (730) are arranged at intervals and are perpendicular to the three-phase copper bus assembly (400).