Bare conductor-based curve type bus fitting system in strong earthquake area

Abstract

The utility model discloses a curved bus fitting system for a strong earthquake area based on a bare conductor, and belongs to the technical field of electric power fitting production and manufacturing. The device mainly comprises a plurality of post insulators which are arranged at intervals, and the top of each post insulator is fixedly provided with a bidirectional connecting seat which is used for being electrically connected with a previous-stage electric power facility and a next-stage electric power facility. The wire inlet end and the wire outlet end of the bidirectional connecting seat of the middle post insulator are provided with lifting wire clamps; the wire outlet end of the bidirectional connecting seat of the head end post insulator is also provided with a lifting wire clamp; the wire inlet end of the bidirectional connecting seat of the tail end post insulator is also provided with a lifting wire clamp; power transmission is realized between every two adjacent lifting wire clamps through a bare conductor; and the lifting wire clamp lifts the root of the bare conductor in an upward trend. According to the utility model, the design thought of a traditional substation bus fitting system is broken, the conception is simple and unique, the shock resistance is very strong, the bus fitting system has stable power transmission performance, and the electric power fitting is simple and unique in design and easy to produce and manufacture.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric power fittings. Specifically, it particularly relates to a curve-shaped busbar fitting system for strong earthquake areas based on bare conductors, which breaks the traditional design concept of the anti-seismic busbar fitting system, has a simple and unique concept, stable performance of the power transmission system, high safety, extremely strong anti-seismic ability, simple structural design, easy manufacturing of fittings, and greatly reduces the project cost of power transmission in substations in earthquake-prone areas. Background Technique

[0002] The substation busbar fitting system is a core component of the substation, which is responsible for transmitting electric energy from the transformer to each distribution device or line. At present, the substation busbar fitting system basically adopts a tubular busbar fitting system as the power transmission equipment. The tubular busbar fitting system mainly includes a tubular busbar made of aluminum or copper, post insulators, fixing fittings, expansion joints, etc. (a Chinese patent with the authorization announcement number CN106052997B and the utility model creation name of "Anti-seismic test device for extra-high voltage DC double-column coupled composite post insulators and its test method", the partial structural schematic diagram of the traditional tubular busbar fitting system publicly shown in its specification drawings Figure 1 is as follows). However, although the traditional tubular busbar fitting system is widely used, it cannot be directly applied in strong earthquake areas such as Chile, the Japanese archipelago, California, Nepal, and the Indonesian archipelago. The reasons are analyzed as follows:

[0003] The height of the composite post insulators used to support the tubular busbar usually exceeds 10 meters. The natural vibration frequency of the composite post insulators decreases with the increase of height. These tall composite post insulators are prone to coupling with the frequency of seismic waves, resulting in resonance. Resonance will inevitably lead to excessive swing at the top of the composite post insulators. And this swing amplitude far exceeds the bearing range of the expansion joints of the tubular busbar fitting system, resulting in damage or fracture at the connection points between the composite post insulators and the tubular busbar, thus interrupting the power transmission of the entire system. Therefore, in strong earthquake areas, the traditional tubular busbar fitting system cannot be directly used, and additional compensation measures such as specially designed anti-seismic and movable connectors need to be designed. However, these compensation measures have complex structural designs, high costs, and relatively high failure rates. Content of the Utility Model

[0004] The purpose of the utility model is to address the deficiencies existing in the prior art, and provides a curve-shaped busbar fitting system for strong earthquake areas based on bare conductors, which breaks the traditional design concept of the anti-seismic busbar fitting system, has a simple and unique concept, stable performance of the power transmission system, high safety, extremely strong anti-seismic ability, simple structural design, easy manufacturing of fittings, and greatly reduces the project cost of power transmission in substations in earthquake-prone areas.

[0005] The utility model is realized through the following technical solutions:

[0006] A curved busbar fitting system based on bare conductors in strong earthquake areas, comprising a plurality of spacer post insulators, and a two-way connection seat for electrically connecting to the previous and next electrical facilities is fixedly installed at the top of each post insulator;

[0007] Lifting wire clamps are installed at the incoming line end and the outgoing line end of the two-way connection seat of the middle post insulator by means of a composite connection method of mechanical fixation and electrical connection;

[0008] Lifting wire clamps are also installed at the outgoing line end of the two-way connection seat of the first-end post insulator by means of a composite connection method of mechanical fixation and electrical connection;

[0009] Lifting wire clamps are also installed at the incoming line end of the two-way connection seat of the last-end post insulator by means of a composite connection method of mechanical fixation and electrical connection;

[0010] Power transmission is achieved between two adjacent said lifting wire clamps through bare conductors; the lifting wire clamps hold the root of the bare conductor in an upward trend;

[0011] The distance between two adjacent said post insulators is L1, and the length of the bare conductor between two adjacent said post insulators is L2, where L2 > L1.

[0012] Preferably, the lifting wire clamp includes a plurality of finger-type claws regularly spaced along the circumferential direction and arranged in the vertical direction. Each finger-type claw correspondingly fixes a bare conductor in electrical connection with it, and the root of the bare conductor is distributed along the length direction of the finger-type claw.

[0013] Preferably, the finger-type claw is provided with a wire accommodation groove for accommodating the bare conductor along its inner wall in the length direction, and an indication groove perpendicular to the wire accommodation groove for indicating the installation position of the bare conductor end. After the bare conductor is assembled into the wire accommodation groove, it is pressed by a clamp block fixedly connected to the finger-type claw.

[0014] Preferably, the number of the clamp blocks is multiple, and the multiple clamp blocks are arranged in sequence along the length direction of the finger-type claw; each clamp block is fixedly connected to the finger-type claw by a fastener.

[0015] Preferably, the two-way connection seat is a T-shaped connection seat, which includes a T-shaped connecting plate provided with a previous-stage bolt hole array and a next-stage bolt hole array. The T-shaped connecting plate is welded integrally with the connection seat base, and the connection seat base is used for fixedly connecting to the post insulator.

[0016] Preferably, the lifting wire clamp is mechanically fixed and electrically connected to the two-way connection seat through a wire clamp bracket;

[0017] The clamp bracket includes two symmetric arms symmetrically arranged; the two symmetric arms are respectively arranged on both sides of the T-shaped connecting plate and are fixed integrally with the T-shaped connecting plate by bolt fasteners;

[0018] The symmetric arm includes an arc base and a bracket connecting plate perpendicular to the arc base, and a group of bracket bolt holes corresponding to the positions of the bolt holes of the T-shaped connecting plate are provided on the bracket connecting plate;

[0019] After the clamp bracket is fixedly connected to the T-shaped connecting plate of the bidirectional connecting seat, the outer contours of the arc bases of the two symmetric arms form a complete circle.

[0020] Preferably, a bracket support plate for enhancing the structural strength is welded between the arc base and the bracket connecting plate;

[0021] A connecting seat support plate for enhancing the structural strength is welded between the T-shaped connecting plate and the connecting seat base.

[0022] Preferably, the multiple finger-type claws for supporting the clamp are regularly distributed along the circumferences of the two arc bases, and the finger-type claws are mechanically fixed and electrically connected to the arc bases.

[0023] Preferably, L2 is 1.3 - 1.4 times of L1, and the bare conductors between two adjacent post insulators are in an S shape or an arch shape; the space separation between multiple bare conductors is realized by a spacer separator;

[0024] The spacer separator includes a separating frame for supporting, and a plurality of wire grooves with the same number as the number of bare conductors are regularly distributed at intervals along the circumferential direction on the outer wall of the separating frame. After the bare conductors are received in the wire grooves, they are pressed and fixed by a pressing block fixedly connected to the separating frame.

[0025] Preferably, the post insulator is a composite post insulator, and the composite post insulator is fixedly installed on the base; a grading shield ring is further installed at the high-voltage end of the post insulator.

[0026] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0027] 1. The present utility model breaks the design thinking of the traditional substation busbar fitting system, with a simple and unique concept. It uses the surplus of the bare conductor to eliminate the swinging action of the composite post insulator, and cleverly holds the two ends of the bare conductor in an upward trend to overcome the excessive sag phenomenon of the bare conductor with surplus due to the gravity effect; it has extremely strong seismic resistance, stable power transmission performance of the busbar fitting system, and high safety.

[0028] 2. The lifting line clamp and other various electric power fittings of the utility model are designed simply and uniquely, and are easy to manufacture. Compared with the traditional complex design and high-cost seismic structure, the utility model effectively simplifies the construction difficulty of the power transmission project in the substation in the seismic area, greatly reduces the project cost, makes the substation construction more economical and efficient, and also shortens the project construction period.

[0029] 3. First of all, the utility model has extremely strong seismic resistance; secondly, due to the simple system structure, the failure rate is very low. These two major advantages are crucial for the substations located in the strong earthquake area, and can maintain the stability of power transmission during the earthquake, providing strong guarantee for the post-earthquake rescue and recovery work.

[0030] 4. The utility model is not only applicable to the strong earthquake area, but also applicable to the strong wind area.

[0031] 5. The utility model provides new ideas and methods for the design and construction of substations in the seismic area, has a revolutionary significance in the field of substation power transmission technology, and promotes the technological progress and development of the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the overall structural schematic diagram of the busbar fitting system of the utility model.

[0033] Figure 2 is the utility model Figure 1 The enlarged view at A in it.

[0034] Figure 3 is the utility model Figure 1 The enlarged view at B in it.

[0035] Figure 4 is the exploded view of the assembly process of the lifting line clamp and the line clamp bracket of the utility model.

[0036] Figure 5 is the structural schematic diagram of the line clamp bracket in the top view direction of the utility model.

[0037] Figure 6 is the utility model Figure 1 The partial three-dimensional structural schematic diagram.

[0038] Figure 7 is the utility model Figure 6 The enlarged view at C in it.

[0039] Figure 8 is the utility model Figure 6 The enlarged view at D in it.

[0040] In the figure: 11, head-end post insulator; 12, intermediate post insulator; 13, tail-end post insulator; 2, lifting clamp; 21, finger-type jaw; 211, wire accommodation groove; 212, indicating groove; 213, clamping block; 3, bare wire; 4, base; 5, two-way connection seat; 51, T-shaped connection plate; 52, front-stage bolt hole array; 53, rear-stage bolt hole array; 54, connection seat base; 55, connection seat support plate; 6, clamp support; 61, symmetric arm; 611, arc base; 612, support connection plate; 613, support bolt hole group; 614, support support plate; 7, grading ring; 8, spacer separator; 81, separation frame; 82, wire groove; 83, pressing block. Detailed implementation mode

[0041] In order to enable readers to better understand the design concept of the present utility model, the technical solutions of the present utility model will be further described and explained below in conjunction with embodiments. It should be noted that the orientation terms that may be involved in the following paragraphs, including but not limited to "upper, lower, left, right, front, rear", etc., are based on the visual orientation shown in the corresponding specification drawings. It should not and should not be regarded as a limitation of the protection scope or technical solution of the present utility model. Its purpose is only to facilitate those skilled in the art to better understand the technical solutions described in the present utility model.

[0042] In the description of this specification, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] Embodiment 1

[0044] As Figures 1 to 4As shown in the figure, a curved busbar fitting system based on bare conductors in strong earthquake areas includes a plurality of post insulators arranged at intervals. At the top of each post insulator, a two-way connection seat 5 for electrical connection with the previous and next power facilities is fixedly installed; according to the power transmission path, the first post insulator is the head post insulator 11, the last post insulator is the end post insulator 13, and the post insulators located between the first post insulator and the last post insulator are intermediate post insulators 12. Lifting clamps 2 are installed at the incoming line end and the outgoing line end of the two-way connection seat 5 of the intermediate post insulator 12 by means of a composite connection method of mechanical fixation and electrical connection; the outgoing line end of the two-way connection seat 5 of the head post insulator 11 is also installed with a lifting clamp 2 by means of a composite connection method of mechanical fixation and electrical connection; the incoming line end of the two-way connection seat 5 of the end post insulator 13 is also installed with a lifting clamp 2 by means of a composite connection method of mechanical fixation and electrical connection. Power transmission is realized between two adjacent lifting clamps 2 through a bare conductor 3; the lifting clamp 2 holds the root of the bare conductor 3 in an upward trend. The distance between two adjacent post insulators is L1, and the length of the bare conductor 3 between two adjacent post insulators is L2, where L2 > L1.

[0045] Power transmission is realized between two adjacent lifting clamps 2 through a bare conductor 3. In this embodiment, the bare conductor 3 is designed with a margin. That is, assuming the distance between two adjacent post insulators is L1 and the length of the bare conductor 3 installed between two adjacent post insulators is L2, then L2 > L1; after the bare conductor 3 is lifted, the bare conductor between two adjacent post insulators is in an S shape or an arch shape. When the head of the post insulator swings greatly under the influence of seismic waves or the like, the margin can eliminate the damage to the busbar fitting system caused by the swing of the head of the post insulator, thus ensuring the stable operation of power transmission. However, if the bare conductor 3 with a margin is not properly supported, the bare conductor 3 will sag excessively and pose a safety hazard (the excessively sagging bare conductor 3 may cause a grounding fault because it is too close to the ground, or may cause damage to the line or a safety accident due to accidental contact by an object). In this embodiment, the lifting clamp holds the two ends of the bare conductor 3 in an upward trend. The bare conductor 3 is located between two adjacent post insulators. After the distance between two adjacent post insulators is determined, the bare conductor 3 with a certain margin will naturally form a stable S shape or arch shape under the support of structures such as the lifting clamp 2. The stable S shape or arch shape layout can maintain the height of the conductor and ensure the safety and compliance of power transmission.

[0046] As Figure 1As shown in the figure, the power transmission path of this embodiment is as follows: The incoming line end of the two-way connection base 5 of the first-end terminal electrical equipment is electrically connected to the first-end post insulator 11. The outgoing line end of the two-way connection base 5 of the first-end post insulator 11 is electrically connected to the first-stage bare conductor through the lifting clamp 2. The first-stage bare conductor transmits power to the lifting clamp 2 and the two-way connection base 5 of the intermediate post insulator 12, and then is transmitted step by step by the next-stage bare conductor until it is transmitted to the lifting clamp 2 of the terminal post insulator 13. The lifting clamp 2 of the terminal post insulator 13 transmits power to the terminal terminal electrical equipment through the two-way connection base 5 of the terminal post insulator 13. In this way, a complete power transmission path of the curved busbar fitting system is formed.

[0047] This embodiment breaks through the traditional design concept of the substation busbar fitting system. The concept is simple and unique. It uses the surplus of the bare conductor to eliminate the swinging action of the composite post insulator, and cleverly holds the two ends of the bare conductor in an upward trend to overcome the excessive sag of the bare conductor with surplus due to gravity; it has extremely strong seismic resistance, stable power transmission performance of the busbar fitting system, and high safety.

[0048] This embodiment is not only applicable to strong earthquake areas, but also applicable to strong wind areas.

[0049] This embodiment provides new ideas and methods for the design and construction of substations in seismic areas, has transformative significance in the field of substation power transmission technology, and promotes the technological progress and development of the industry.

[0050] Embodiment 2

[0051] On the basis of Embodiment 1, this embodiment continues to describe in detail the technical features involved and the functions and roles played by these technical features in the present utility model, so as to help those skilled in the art fully understand the technical solution of the present utility model and reproduce it.

[0052] Such as Figures 1 to 8As shown in the figure, a curved busbar fitting system based on bare conductors in strong earthquake areas includes a plurality of spacer post insulators. A two-way connector 5 for electrical connection with the previous and next electrical facilities is fixedly installed at the top of each spacer post insulator. According to the power transmission path, the first spacer post insulator is the head-end spacer post insulator 11, the last spacer post insulator is the tail-end spacer post insulator 13, and the spacer post insulators located between the first spacer post insulator and the last spacer post insulator are intermediate spacer post insulators 12. Lifting wire clamps 2 are installed at the incoming line end and the outgoing line end of the two-way connector 5 of the intermediate spacer post insulator 12 by means of a combined connection method of mechanical fixation and electrical connection. The outgoing line end of the two-way connector 5 of the head-end spacer post insulator 11 is also installed with a lifting wire clamp 2 by means of a combined connection method of mechanical fixation and electrical connection. The incoming line end of the two-way connector 5 of the tail-end spacer post insulator 13 is also installed with a lifting wire clamp 2 by means of a combined connection method of mechanical fixation and electrical connection. Power transmission is achieved between two adjacent lifting wire clamps 2 through a bare conductor 3. The lifting wire clamp 2 holds the root of the bare conductor 3 in an upward trend. The distance between two adjacent spacer post insulators is L1, and the length of the bare conductor 3 between two adjacent spacer post insulators is L2, where L2 > L1.

[0053] In this embodiment, the lifting wire clamp 2 includes a plurality of finger-shaped claws 21 that are regularly spaced circumferentially and arranged in the vertical direction. Each finger-shaped claw 21 corresponds to fixing a bare conductor 3 that maintains electrical connection with it, and the root of the bare conductor 3 is distributed along the length direction of the finger-shaped claw 21. The structure design of the lifting wire clamp is simple and reasonable, and it is easy to produce and process.

[0054] In this embodiment, the structure such as the lifting wire clamp 2 is ingeniously designed to hold the two ends of the bare conductor 3 in an upward trend. The bare conductor 3 is located between two adjacent spacer post insulators. After the distance between two adjacent spacer post insulators is determined, with a certain margin of the bare conductor 3, under the support of the structure such as the lifting wire clamp 2, the bare conductor 3 will naturally form a stable S-shaped or arch-shaped configuration. The stable S-shaped or arch-shaped layout can maintain the height of the conductor and ensure the safety and compliance of power transmission. In addition, the structure such as the lifting wire clamp 2 holds the two ends of the bare conductor 3 in an upward trend. This structure design can effectively disperse the weight of the conductor, reduce the pressure at the connection point, and thus reduce the risk of local damage caused by long-term gravity.

[0055] The earthquake-resistant method of this embodiment includes the following operating steps:

[0056] Step 1: Fix N spacer post insulators on the ground in advance; N is an integer and N≥3. According to the power transmission path, the first post insulator is the head post insulator 11, the last post insulator is the tail post insulator 13, and the post insulators located between the first and the last post insulators are intermediate post insulators 12. The post insulators are composite post insulators, and the composite post insulators are fixedly installed on the base 4; a grading shielding ring 7 is also installed at the high-voltage end of the post insulator.

[0057] Step 2: A two-way connector 5 for electrical connection with the previous and next power facilities is fixedly installed at the top of each post insulator. Among them,

[0058] Lifting wire clips 2 are installed at both the incoming line end and the outgoing line end of the two-way connector 5 of the intermediate post insulator 12 by a composite connection method of mechanical fixation and electrical connection; the composite connection method of mechanical fixation and electrical connection is mechanical fixation while maintaining electrical connection.

[0059] Lifting wire clips 2 are also installed at the outgoing line end of the two-way connector 5 of the head post insulator 11 by a composite connection method of mechanical fixation and electrical connection.

[0060] Lifting wire clips 2 are also installed at the incoming line end of the two-way connector 5 of the tail post insulator 13 by a composite connection method of mechanical fixation and electrical connection.

[0061] The lifting wire clip 2 includes a plurality of finger-type claws 21 that are regularly spaced along the circumference and arranged in the vertical direction; each finger-type claw 21 fixedly corresponds to a bare wire 3 that maintains electrical connection with it, and the root of the bare wire 3 is distributed along the length direction of the finger-type claw 21; the plurality of finger-type claws 21 hold the roots of the plurality of bare wires 3 in an upward trend.

[0062] Power transmission is achieved between two adjacent lifting wire clips 2 through the bare wire 3. The bare wire 3 is designed with a surplus, that is, assuming the distance between two adjacent post insulators is L1 and the length of the bare wire 3 installed between two adjacent post insulators is L2, then, L2>L1. In this embodiment, L2 is 1.3 - 1.4 times of L1, and this range design is more conducive to keeping the bare wire between two adjacent post insulators in a stable S shape or arch shape.

[0063] In this embodiment, multiple bare conductors 3 are spatially separated by a spacer 8. The spacer 8 includes a separating frame 81 for support. On the outer wall of the separating frame 81, wire grooves 82 with the same number as the bare conductors 3 are regularly distributed at circumferential intervals. After the bare conductors 3 are received in the wire grooves 82, they are pressed and fixed by a pressing block 83 fixedly connected to the separating frame 81. The pressing block 83 is mechanically fixed to the separating frame 81 by an internal hexagonal bolt. The spacer 8 is mainly used for fixing and supporting the bare conductors 3, with a simple structural design, easy production and manufacturing, and convenient and fast installation for high-altitude operations.

[0064] In this embodiment, the two-way connection seat 5 is a T-shaped connection seat, which includes a T-shaped connecting plate 51 provided with a front-stage bolt hole array 52 and a rear-stage bolt hole array 53. The T-shaped connecting plate 51 is integrally welded to the connection seat base 54, and the connection seat base 54 is used for fixedly connecting with a post insulator. The lifting clamp 2 is mechanically fixed and electrically connected to the two-way connection seat 5 through a clamp support 6. The clamp support 6 specifically includes two symmetrically arranged symmetric arms 61. The two symmetric arms 61 are respectively arranged on both sides of the T-shaped connecting plate 51 and are fixedly integrated with the T-shaped connecting plate 51 by bolt fasteners. The symmetric arm 61 includes an arc base 611 and a support connecting plate 612 perpendicular to the arc base 611. The support connecting plate 612 is provided with a support bolt hole group 613 corresponding to the bolt hole positions of the T-shaped connecting plate 51. After the clamp support 6 is fixedly connected to the T-shaped connecting plate 51 of the two-way connection seat 5, the outer contours of the arc bases 611 of the two symmetric arms 61 form a complete circle. The clamp support adopts a symmetric structural design, realizing two-way contact with the two-way connection seat on the premise of ensuring uniform stress on each bare conductor, with good electrical conductivity and effectively improving the power transmission capacity of the entire busbar fitting system. All the electrical fittings have a simple and reasonable structural design, are easy to produce and manufacture, and have a low manufacturing cost.

[0065] In this embodiment, a support plate 614 for enhancing the structural strength is welded between the arc base 611 and the support connecting plate 612; a connection seat support plate 55 for enhancing the structural strength is welded between the T-shaped connecting plate 51 and the connection seat base 54. This is beneficial to improving the stability of the busbar fitting system.

[0066] In this embodiment, multiple finger-shaped claws 21 of the lifting clamp 2 are circumferentially and regularly distributed along the two arc bases 611. The finger-shaped claws 21 are mechanically fixed and electrically connected to the arc bases 611 through bolt fasteners. The regular distribution enables the bare conductors 3 to be evenly stressed. Along the inner wall of the finger-shaped claw 21 in the length direction, a wire receiving groove 211 for receiving the bare conductor 3 is provided, and an indicating groove 212 perpendicular to the wire receiving groove 211 and used to indicate the installation position of the bare conductor end is also provided. After the bare conductor 3 is assembled into the wire receiving groove 211, it is pressed by a clamping block 213 fixedly connected to the finger-shaped claw 21. The number of clamping blocks 213 is multiple, and the multiple clamping blocks 213 are arranged in sequence along the length direction of the finger-shaped claw 21; each clamping block 213 is fixedly connected to the finger-shaped claw 21 by a fastener. The structural design such as the finger-shaped claw 21 plays a powerful upward lifting role on the bare conductor 3, and the overall structural design is reasonable and simple, and the manufacturing implementation is easy. The design of the wire receiving groove 211 not only facilitates the workers' high-altitude operation but also helps to ensure the uniform power distribution of the entire busbar fitting system.

[0067] Step 3: The incoming line end of the two-way connection seat 5 of the first-end post insulator 11 is electrically connected to the first-end terminal electrical equipment;

[0068] Step 4: The outgoing line end of the two-way connection seat 5 of the terminal post insulator 13 is electrically connected to the terminal terminal electrical equipment.

[0069] In this embodiment, the lifting clamp 2 is electrically connected to the two-way connection seat 5 through the clamp bracket 6, and the rest of the transmission path is the same as that in Embodiment 1.

[0070] On the basis of having the advantages of Embodiment 1, this embodiment also has the following advantages:

[0071] The designs of various electrical fittings such as the lifting clamp in this embodiment are simple and unique, the mechanical connection is firm, the electrical connection has good contact, and the production and manufacturing are easy; compared with the traditional complex design and high-cost seismic structure, the utility model effectively simplifies the construction difficulty of the power transmission project in the seismic area substation, greatly reduces the project cost, makes the substation construction more economical and efficient, and also shortens the project construction period;

[0072] This embodiment has extremely strong seismic resistance first; secondly, due to the simple system structure, the failure rate is very low. These two major advantages are crucial for the substations located in strong earthquake areas, and can maintain the stability of power transmission during earthquakes and provide strong guarantee for post-earthquake rescue and recovery work.

[0073] In summary, the above are only the preferred embodiments of the utility model, and are not used to limit the scope of implementation of the utility model. All equivalent changes and modifications made according to the shape, structure, features and spirit of the scope of the claims of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A curved busbar fitting system based on bare conductors in strong earthquake areas, characterized in that: It includes a plurality of post insulators arranged at intervals, and a two-way connection seat (5) for electrically connecting to the previous and next-level power facilities is fixedly installed at the top of each post insulator; Lifting wire clamps (2) are installed at both the incoming line end and the outgoing line end of the two-way connection seat (5) of the middle post insulator (12) by a composite connection method of mechanical fixation and electrical connection; Lifting wire clamps (2) are also installed at the outgoing line end of the two-way connection seat (5) of the first-end post insulator (11) by a composite connection method of mechanical fixation and electrical connection; Lifting wire clamps (2) are also installed at the incoming line end of the two-way connection seat (5) of the end post insulator (13) by a composite connection method of mechanical fixation and electrical connection; Power transmission is realized between two adjacent said lifting wire clamps (2) through a bare wire (3); the lifting wire clamps (2) hold the root of the bare wire (3) in an upward trend; The distance between two adjacent said post insulators is L1, and the length of the bare wire (3) between two adjacent said post insulators is L2, where L2 > L1.

2. The curved busbar fitting system based on bare conductors according to claim 1, characterized in that: The lifting wire clamp (2) includes a plurality of finger-type claws (21) regularly spaced along the circumference and arranged in the vertical direction. Each said finger-type claw (21) correspondingly fixes a bare wire (3) that maintains electrical connection with it, and the root of the bare wire (3) is distributed along the length direction of the finger-type claw (21).

3. The curved busbar fitting system based on bare conductors in strong earthquake areas according to claim 2, wherein: The finger-type claw (21) is provided with a wire receiving groove (211) for accommodating the bare wire (3) along its inner wall in the length direction, and an indicating groove (212) perpendicular to the wire receiving groove (211) for indicating the installation position of the bare wire end. After the bare wire (3) is assembled into the wire receiving groove (211), it is pressed by a clamping block (213) fixedly connected to the finger-type claw (21).

4. A curved busbar fitting system based on bare conductors in strong earthquake areas according to claim 3, characterized in that: The number of the clamping blocks (213) is multiple, and the multiple clamping blocks (213) are arranged in sequence along the length direction of the finger-type claw (21); each said clamping block (213) is fixedly connected to the finger-type claw (21) by a fastener.

5. The curved busbar fitting system based on bare conductors according to claim 2, characterized in that: The two-way connection seat (5) is a T-shaped connection seat, which includes a T-shaped connecting plate (51) provided with a previous-level bolt hole array (52) and a next-level bolt hole array (53). The T-shaped connecting plate (51) is integrally welded with a connection seat base (54), and the connection seat base (54) is used for fixedly connecting with the post insulator.

6. The curved busbar fitting system based on bare conductors in strong earthquake areas according to claim 5, characterized in that: The lifting wire clamp (2) is mechanically fixed and electrically connected to the two-way connection seat (5) through a wire clamp bracket (6); The wire clamp bracket (6) includes two symmetrically arranged symmetric arms (61); the two symmetric arms (61) are respectively arranged on both sides of the T-shaped connecting plate (51) and are fixedly integrated with the T-shaped connecting plate (51) by bolt fasteners; The symmetric arm (61) includes an arc base (611) and a bracket connecting plate (612) perpendicular to the arc base (611). The bracket connecting plate (612) is provided with a bracket bolt hole group (613) corresponding to the bolt hole positions of the T-shaped connecting plate (51); After the wire clamp bracket (6) is fixedly connected to the T-shaped connecting plate (51) of the bidirectional connecting seat (5), the outer contours of the arc bases (611) of the two symmetric arms (61) form a complete circle.

7. A curve-shaped busbar fitting system based on bare conductors in a strong earthquake area according to claim 6, characterized in that: A bracket support plate (614) for enhancing the structural strength is welded between the arc base (611) and the bracket connecting plate (612); A connecting seat support plate (55) for enhancing the structural strength is welded between the T-shaped connecting plate (51) and the connecting seat base (54).

8. A curved busbar fitting system based on bare conductors in a strong earthquake area according to claim 6, characterized in that: A plurality of finger-type claws (21) of the lifting wire clamp (2) are regularly distributed along the circumferences of the two arc bases (611), and the finger-type claws (21) are mechanically fixed and electrically connected to the arc bases (611).

9. The curve-shaped busbar fitting system based on bare conductors according to claim 1, characterized in that: L2 is 1.3 - 1.4 times of L1, and the bare wire (3) between two adjacent post insulators is in an S shape or an arch shape; the space separation between multiple bare wires (3) is realized by a spacer separator (8); The spacer separator (8) includes a separating frame (81) for support. The outer wall of the separating frame (81) is regularly distributed with wire grooves (82) having the same number as the number of bare wires (3) at circumferential intervals. After the bare wires (3) are received in the wire grooves (82), they are tightly fixed by a pressing block (83) fixedly connected to the separating frame (81).

10. The curve-shaped busbar fitting system based on bare conductors according to claim 1, characterized in that: The post insulator is a composite post insulator, and the composite post insulator is fixedly installed on the base (4); a grading shield ring (7) is further installed at the high-voltage end of the post insulator.

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