A common box phase-jumping bus structure for high voltage combined electric appliance

Abstract

The utility model provides a kind of common box phase jump bus structure for high voltage combined electric appliance belongs to common box phase jump bus technical field, including shell;Inside the internal conductor assembly, contact assembly and insulating support assembly of the shell are equipped;The internal conductor assembly includes two spiral conductors and a U-shaped conductor;The contact assembly includes contact, contact seat, guide structure member and spring contact finger;The insulating support assembly includes basin type insulator one and basin type insulator two;Wherein, the top of the basin type insulator one is fixedly connected with two spiral conductors and one U-shaped conductor one end by screw, and the other end of two spiral conductors and one U-shaped conductor is fixedly connected with contact by screw;Basin type insulator one and basin type insulator two are fixedly connected with shell;The utility model is simple and compact in structure, and electrical performance is excellent, and it is strong and can be adapted to a variety of installation environments.

Description

Technical Field

[0001] This utility model belongs to the technical field of common-enclosure phase-skipping busbars, specifically relating to a common-enclosure phase-skipping busbar structure for high-voltage combined electrical appliances. Background Technology

[0002] During the operation of high-voltage combined electrical equipment (HPE), the phase sequence of the busbars often needs to be adjusted due to factors such as the layout of the power system, the installation location of the equipment, and the demand for power transmission. For example, in scenarios such as the expansion of substations, the upgrading and renovation of equipment, or the connection of equipment from different manufacturers, there may be situations where it is necessary to change the phase sequence of the busbars. As an important component in high-voltage combined electrical equipment used for transmitting and distributing electrical energy, the adjustment of the internal phase sequence of the busbars arranged in a common enclosure is crucial to the safe and stable operation of the entire power system.

[0003] Defects and shortcomings of existing technology:

[0004] 1. Complex structure: Traditional phase-jumping methods often use multiple complex switching elements and long connecting conductors to change the phase sequence. These switching elements and connecting conductors not only increase the size and weight of the equipment, but also greatly increase the difficulty of installation and maintenance. Some high-voltage combined electrical appliances use multiple right-angle bends and intermediate transition busbars to achieve phase-jumping. The entire structure requires a large number of parts for assembly, occupies a large space, and requires precise positioning and connection during installation, which consumes a lot of manpower and time.

[0005] 2. Poor electrical performance: The complex structure leads to a longer current path and increased resistance, resulting in increased power loss. At the same time, the increased contact points between the adapter and the connecting conductor also increase the contact resistance, which can easily cause overheating and affect the normal operation of the equipment.

[0006] 3. Poor versatility: Most existing phase-jumping structures are designed for specific equipment models and phase sequence adjustment requirements, lacking versatility. When encountering different phase sequence adjustment requirements or equipment upgrades, it is often necessary to redesign and replace the entire phase-jumping structure, which is costly and inefficient.

[0007] 4. Inability to achieve commutation between any two phases: Existing technology can only achieve fixed phase sequence conversion and cannot flexibly meet the commutation requirements between any two phases. In actual power system operation, due to the influence of various factors, it is sometimes necessary to adjust any two phases, but the existing phase-jumping bus cannot meet this diverse requirement.

[0008] Therefore, a common-enclosure phase-jumping busbar structure for high-voltage combined electrical appliances is proposed. Summary of the Invention

[0009] This utility model provides a common-enclosure phase-jumping busbar structure for high-voltage combined electrical appliances, the purpose of which is to solve the problems mentioned above.

[0010] This utility model provides a common-enclosure phase-jumping busbar structure for high-voltage combined electrical appliances, including a housing; an internal conductor assembly, a contact assembly, and an insulation support assembly disposed inside the housing; the internal conductor assembly includes two helical conductors and one U-shaped conductor; the contact assembly includes a contact, a contact seat, a guide structure, and a spring contact finger; the insulation support assembly includes a basin-type insulator one and a basin-type insulator two; wherein, the top of the basin-type insulator one is fixedly connected to one end of the two helical conductors and the U-shaped conductor by screws, and the other end of the two helical conductors and the U-shaped conductor is fixedly connected to the contact by screws; the basin-type insulator one and the basin-type insulator two are fixedly connected to the housing; three inserts on the basin-type insulator one are respectively fixedly connected to the contact seat, the guide structure, and the spring contact finger, and the inserts on the contact seat and the basin-type insulator two are fixedly connected.

[0011] Furthermore, both basin-type insulator one and basin-type insulator two are fitted with airtight sealing rings and waterproof sealing rings at the connection points between them and the shell, with the airtight sealing ring located inside the waterproof sealing ring.

[0012] Furthermore, the spiral conductor is cast into a spiral shape by a mold, and both ends of the spiral conductor are respectively provided with a boss one and a boss two. Both sides of the boss one and the boss two are provided with chamfers, and a groove one is opened at the center of one side wall of the boss one and the boss two.

[0013] Furthermore, the U-shaped conductor includes an intermediate body, with a boss three and a boss four respectively provided at both ends of the intermediate body. Both sides of the boss three and the boss four are chamfered, and a groove two is provided at the center of one side wall of the boss three and the boss four.

[0014] Furthermore, the contact seat is a cylindrical structure with chamfered ends. A recessed hole is provided in the middle of the contact seat, and spring contact finger groove one, spring contact finger groove two, and guide groove are sequentially provided on the inner side wall of the recessed hole.

[0015] Furthermore, the three inserts are referred to as insert one, insert two, and insert three, and the three inserts are distributed in an equilateral triangle.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. Simple and compact structure: The combination design of spiral conductor and U-shaped conductor greatly reduces the number of parts and connection points compared with the traditional phase-jumping structure, making the structure of the entire phase-jumping busbar simpler and more compact. This not only reduces the size and weight of the equipment, but also facilitates installation and maintenance.

[0018] 2. Excellent electrical performance: The spiral-shaped conductor and the U-shaped conductor are integrally formed, which reduces the number of conductor mating surfaces, reduces the commutation module circuit resistance by 20%, and reduces power loss and heat generation. At the same time, the layout and connection method of the entire internal conductor assembly have been optimized to reduce resistance and inductance and improve the electrical transmission efficiency of the phase-jumping bus.

[0019] 3. High versatility: The phase-jumping busbar can realize the commutation between any two phases in the common busbar, which has strong versatility. Whether in different power system layouts or in the process of equipment upgrade and transformation, it can flexibly meet various phase sequence adjustment needs without redesigning and replacing the entire phase-jumping structure.

[0020] 4. Adaptable to various installation environments: The sealed design and excellent mechanical properties of the busbar casing enable the phase-jumping busbar to adapt to various harsh installation environments, such as high temperature, humidity, and dusty places. At the same time, its reliable grounding and shielding measures also ensure normal operation in complex electromagnetic environments.

[0021] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram (front view) of the installation of the common-box phase-jumping busbar of this utility model;

[0024] Figure 2 This is a side view of the installation diagram of the common-box phase-jumping busbar of this utility model;

[0025] Figure 3 This is a schematic diagram showing the phase sequence before and after the phase jump of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the spiral conductor of this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the U-shaped conductor of this utility model;

[0028] Figure 6 This is a schematic diagram of the contact seat of this utility model;

[0029] Figure 7This is a schematic diagram of the structure of the spring contact finger of this utility model;

[0030] Figure 8 This is a schematic diagram of the structure of the basin-type insulator of this utility model;

[0031] Reference numerals in the attached diagram: 1. Basin-type insulator one; 2. Shell; 3. Spiral conductor; 4. U-shaped conductor; 41. Boss one; 42. Groove one; 43. Spiral body; 44. Boss two; 5. Contact; 51. Boss three; 52. Groove two; 53. Intermediate body; 54. Boss four; 6. Contact seat; 61. Spring contact finger groove one; 62. Spring contact finger groove two; 63. Guide groove; 7. Guide structure; 8. Spring contact finger; 81. Insert one; 82. Insert two; 83. Insert three; 9. Basin-type insulator two; 10. Airtight sealing ring; 11. Waterproof sealing ring. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] Reference Figure 1-8 This utility model provides a common-box phase-jumping busbar structure for high-voltage combined electrical appliances, including a housing 2; an internal conductor assembly, a contact assembly, and an insulation support assembly disposed inside the housing 2; the internal conductor assembly includes two spiral conductors 3 and a U-shaped conductor 4; the contact assembly includes a contact 5, a contact seat 6, a guide structure 7, and a spring contact finger 8; the insulation support assembly includes a basin-type insulator 1 and a basin-type insulator 2 9; wherein, the top of the basin-type insulator 1 is fixedly connected to one end of the two spiral conductors 3 and the U-shaped conductor 4 by screws, and the other end of the two spiral conductors 3 and the U-shaped conductor 4 is fixedly connected to the contact 5 by screws; the basin-type insulator 1 and the basin-type insulator 2 9 are fixedly connected to the housing 2; three inserts on the basin-type insulator 1 are fixedly connected to the contact seat 6, the guide structure 7, and the spring contact finger 8 respectively, and the inserts on the contact seat 6 and the basin-type insulator 2 9 are fixedly connected;

[0034] The housing 2 is made of a metallic material (usually aluminum alloy), which has good electrical conductivity and mechanical strength, and can provide protection and shielding for the internal conductor components;

[0035] The spiral conductor 3 is made of high-conductivity cast aluminum alloy material and is cast into a spiral body 43 through a specific mold. The starting point of the spiral outline is the center point of any insert of the basin insulator, and the ending point of the spiral is on the center line of any position of the other two inserts of the basin insulator 1. The effective number of turns of the spiral is 1 / 3 to 1 / 2 turns. The first and last ends of the spiral conductor 3 are respectively provided with a boss 41 and a boss 44. The two ends of the boss 41 and the boss 44 are chamfered. The middle of the boss is provided with a groove 42. The groove is provided with a through hole, which serves as a fixing and mounting hole for the spiral conductor 3 and the inserts and contact assemblies on the basin insulator 1. The spiral conductor 3 effectively utilizes space and achieves a shorter commutation distance within the limited housing 2, effectively reducing the circuit resistance of the busbar equipment, thereby increasing the current carrying capacity and insulation capacity of the phase-jumping busbar.

[0036] The U-shaped conductor 4 is also made of high-conductivity cast aluminum alloy. Its shape is roughly U-shaped, with the opening direction and size designed according to its connection with the spiral conductor 3 and the overall phase-jumping layout. Through a clever layout and connection method, the spiral conductor 3 and the U-shaped conductor 4 can achieve commutation between any two phases within the common busbar. The insulation distance between any two phases is between 40mm and 90mm. The U-shaped conductor 4 has a boss three 51 and a boss four 54 at its two ends, respectively. Both ends of boss three 51 and boss four 54 have chamfers, and a groove two 52 is located in the middle of the boss. 52 has a through hole as a fixed mounting hole for the U-shaped conductor 4, the insulation support assembly, and the contact connection assembly. One end of the U-shaped conductor 4 is connected to the insulation support assembly, and the other end is connected to the contact assembly. The two sides of the busbar connected to the U-shaped conductor 4 are in the same phase sequence. The U-shaped conductor 4 is used as a phase that does not need to be commutated. For example, when the phase A and phase C are switched, the phase A current enters the phase C contact after passing through the spiral-shaped conductor, and the phase C current enters the phase A contact after passing through the spiral-shaped conductor. The phase sequence remains unchanged after the phase B current passes through the U-shaped conductor. In this way, the phase A and phase C are commutated.

[0037] Contact 5, contact seat 6, guide structure 7 and spring contact finger 8 are used to connect the internal conductor assembly to ensure good mechanical stability and insulation performance between conductors and between conductors and busbar shell, and to prevent electrical short circuits and other faults.

[0038] The contact seat 6 is a cylindrical structure with a chamfer at the end and a concave hole in the middle. The inner wall of the concave hole is provided with a guide groove 63, no less than two spring finger grooves 61 and 62. The tail of the contact seat 6 is provided with a positioning boss, and the end face is provided with an opening as a fixing hole for the contact seat 6.

[0039] The spring contact finger 8 is in the shape of a helical spring, with a certain angle of inclination along the helical direction, the inclination angle being 40° to 70°, the cross-section being elliptical, and the coil height F and coil width E being between EF = 0.5mm and 1.5mm.

[0040] The basin-type insulator 1 is made of epoxy resin, mixed with AL2O3 powder filler and liquid curing agent to improve the curing effect and mechanical and electrical strength of the insulator. The inserts 81, 82, and 83 on the basin-type insulator 1 are made of aluminum alloy or copper alloy. The shape of the inserts is designed according to the layout and fixing requirements of the internal conductor assembly. The inserts 81, 82, and 83 are distributed in an equilateral triangle to make full use of the insulation space and optimize the stress distribution. The edge opening of the basin-type insulator 1 is fixed to the shell 2 with bolts to ensure the stability of the entire insulation support structure inside the shell 2. The inserts are fixed to the internal conductor assembly with screws to ensure that the insulation performance and electrical performance are not affected.

[0041] Both the basin insulator 1 and the basin insulator 2 9 are fitted with an airtight sealing ring 10 and a waterproof sealing ring 11 at the connection between them and the housing 2. The airtight sealing ring 10 is located inside the waterproof sealing ring 11.

[0042] The specific implementation method is as follows:

[0043] Step 1: Thoroughly clean all components with organic solvent (micro-aqueous alcohol) and dry them. Place the basin insulator-1 on the work platform and position it. Insert the two spiral conductors 3 and one end of the U-shaped conductor 4 into the insert of the basin insulator-1 according to the commutation requirements. After adjusting the position, tighten them with screws. Connect the other end of the spiral conductors 3 and U-shaped conductors 4 to the contact 5 with screws. After adjusting the position, tighten the fixing screws. Apply an appropriate amount of high vacuum silicone grease evenly around the entire circumference of the airtight sealing ring 10 and the waterproof sealing ring 11, and place them into the sealing groove of the basin insulator-1 in sequence, ensuring that the sealing rings are completely embedded in the sealing groove. Then, put the housing 2 on from top to bottom, so that the flange surface of the housing 2 fits against the upper end surface of the basin insulator-1. Check the compression state of the airtight sealing ring 10 and the waterproof sealing ring 11. After adjusting the position and confirming the installation status of each component, connect and tighten the housing 2 to the basin insulator-1 with bolts.

[0044] Step 2: Place the basin insulator-1 on the working platform and install the contact seat 6, at least two spring contact fingers 8, and guide structure 7 into the three inserts of the basin insulator-1 in sequence. After adjusting the position of each installed contact seat 6, connect and tighten the contact seat 6 to the inserts of the basin insulator-1 with screws.

[0045] Step 3: Using a lifting ring and lifting tool, invert the assembly unit from Step 2 so that the contact seat 6 faces downwards. Apply an appropriate amount of high-vacuum silicone grease evenly around the entire circumference of the airtight sealing ring 10 and the waterproof sealing ring 11, and place them sequentially into the sealing groove of the basin insulator 9. Slowly lower the entire assembly unit from Step 2 and connect it to Step 1 so that the contact seat 6 fits into the contact 5, and the fitting depth is greater than the two spring contact fingers 8 in the contact seat 6. After checking that all components are correctly positioned, connect and tighten the housing 2 to the basin insulator 9 with bolts. The assembly unit is now complete.

[0046] The spiral conductor 3 can transmit current from one phase of basin insulator 1 to another phase of basin insulator 9. Together with the U-shaped conductor 4, it can realize phase switching between any two phases in the common busbar, such as (A→B, B→A, A→C, C→A, B→C, C→B). The spiral conductor 3 and the U-shaped conductor 4 are cast as one piece, which reduces the number of overlapping surfaces of the phase-switching busbar, reduces the loop resistance of the structure by 20%, thereby reducing the loss of the power transmission line and improving the insulation performance of the line's power transmission capacity.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A common-enclosure phase-jumping busbar structure for high-voltage combined electrical appliances, characterized in that: Includes the shell (2); An internal conductor assembly, a contact assembly, and an insulating support assembly are disposed inside the housing (2); The internal conductor assembly includes two helical conductors (3) and a U-shaped conductor (4); The contact assembly includes a contact (5), a contact seat (6), a guide structure (7), and a spring contact finger (8); The insulating support assembly includes a basin insulator one (1) and a basin insulator two (9); The top of the basin-type insulator (1) is fixed to one end of two spiral conductors (3) and one U-shaped conductor (4) by screws, and the other end of the two spiral conductors (3) and one U-shaped conductor (4) is fixed to the contact (5) by screws. The basin-type insulator one (1) and basin-type insulator two (9) are fixedly connected to the shell (2); The three inserts on the first basin insulator (1) are respectively fixed to the contact seat (6), the guide structure (7) and the spring contact finger (8), and the inserts on the contact seat (6) and the second basin insulator (9) are fixedly connected.

2. The common-enclosure phase-jumping busbar structure for high-voltage combined electrical appliances according to claim 1, characterized in that: An airtight sealing ring (10) and a waterproof sealing ring (11) are embedded at the connection between the basin insulator one (1) and the basin insulator two (9) and the shell (2). The airtight sealing ring (10) is located inside the waterproof sealing ring (11).

3. The common-enclosure phase-jumping busbar structure for high-voltage combined electrical appliances according to claim 1, characterized in that: The spiral conductor (3) is cast into a spiral body (43) by a mold, and the two ends of the spiral conductor (3) are respectively provided with a boss one (41) and a boss two (44). Both sides of the boss one (41) and the boss two (44) are chamfered, and a groove one (42) is opened at the center of one side wall of the boss one (41) and the boss two (44).

4. The common-enclosure phase-jumping busbar structure for high-voltage combined electrical appliances according to claim 1, characterized in that: The U-shaped conductor (4) includes an intermediate body (53), with a boss three (51) and a boss four (54) respectively provided at both ends of the intermediate body (53). Both sides of the boss three (51) and the boss four (54) are chamfered, and a groove two (52) is provided at the center of one side wall of the boss three (51) and the boss four (54).

5. The common-enclosure phase-jumping busbar structure for high-voltage combined electrical appliances according to claim 1, characterized in that: The contact seat (6) is a cylindrical structure with chamfered ends. A concave hole is provided in the middle of the contact seat (6). Spring finger groove 1 (61), spring finger groove 2 (62) and guide groove (63) are sequentially provided on the inner side wall of the concave hole.

6. The common-enclosure phase-jumping busbar structure for high-voltage combined electrical appliances according to claim 1, characterized in that: The three inserts are insert one (81), insert two (82) and insert three (83), and the three inserts are distributed in an equilateral triangle.

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