Substation flexible bus tension self-adaptive compensation tensioning mechanism

Abstract

The application belongs to the technical field of substation equipment, and discloses a tension self-adaptive compensation and tensioning mechanism for a substation flexible bus, which comprises a framework main body and a flexible bus main body, a wire clamp is installed at the end of the flexible bus main body, an insulator string is installed on the surface of the framework main body, a horizontal cylinder is arranged at the end of the insulator string away from the framework main body, a self-adaptive compensation mechanism is arranged in the inner cavity of the horizontal cylinder, the self-adaptive compensation mechanism is composed of an elastic adjusting assembly and a length adjusting assembly, the length adjusting assembly is composed of an extension part and a locking part, the extension part is arranged in the inner cavity of the horizontal cylinder and is connected with the elastic adjusting assembly, the elastic adjusting assembly and the horizontal cylinder are matched with each other, so that the elastic extension and contraction state between the flexible bus main body and the insulator string can be controlled, when the flexible bus main body swings under the action of strong wind, the flexible bus main body and the insulator string can independently and elastically extend and contract, and the tension of the end of the flexible bus main body can be effectively prevented from changing sharply.

Description

Technical Field

[0001] This invention relates to the field of substation equipment technology, specifically a substation flexible busbar tension adaptive compensation tensioning mechanism. Background Technology

[0002] Flexible busbars in substations are exposed, flexible conductive busbars used to transmit large currents in high-voltage power distribution systems. They are core connection components of the primary system and are mainly used in outdoor open-type switchgear (AIS) installations to achieve electrical connections between high-voltage equipment such as transformers, circuit breakers, disconnectors, and voltage / current transformers. They are a type of busbar relative to rigid busbars such as rectangular or tubular types. During installation, flexible busbars are typically connected to insulator strings via suspension hardware, suspending the busbars from the structural beams through the insulator strings.

[0003] Outdoor open-type substations' flexible busbars are exposed to the natural environment for a long time. Affected by factors such as diurnal temperature differences, seasonal temperature differences, icing, and strong winds, the length of the busbars will change significantly.

[0004] Existing flexible busbars cannot adaptively adjust their tension during installation, and the tension can easily rise sharply. When the tension exceeds the bearing capacity of the fittings, insulator strings, and the structure, it can cause serious accidents such as busbar breakage, insulator string cracking, and structural deformation. Summary of the Invention

[0005] The purpose of this invention is to provide an adaptive compensation tensioning mechanism for the tension of flexible busbars in substations, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An adaptive compensation tensioning mechanism for a flexible busbar in a substation includes a frame body and a flexible busbar body. A clamp is installed at one end of the flexible busbar body, and an insulator string is installed on the surface of the frame body. A horizontal cylinder is located at the end of the insulator string away from the frame body. An adaptive compensation mechanism is installed inside the horizontal cylinder. The adaptive compensation mechanism consists of an elastic adjustment component and a length adjustment component. The elastic adjustment component is located inside the horizontal cylinder and connected to the clamp. The elastic adjustment component controls the flexible busbar body and the insulator string to be in an elastically telescopic connection state. The length adjustment component consists of a telescopic part and a locking part. The telescopic part is located inside the horizontal cylinder and connected to the elastic adjustment component. The locking part is connected to the telescopic part. The locking part and the telescopic part cooperate to adjust the relative distance between the flexible busbar body and the insulator string, thereby adjusting the tension of the flexible busbar body.

[0008] As a further aspect of the present invention: the elastic adjustment assembly includes a compensation column slidably installed in the inner cavity of the horizontal cylinder along the axial direction, the compensation column having a central cavity inside, an end hole being opened at one end of the horizontal cylinder facing the main body of the flexible busbar, a connecting cable being fixedly installed on the surface of the clamp, the end of the connecting cable away from the clamp extending through the end hole into the central cavity and connecting to the telescopic part, and a positioning spring being fixedly installed in the inner cavity of the horizontal cylinder, the telescopic end of the positioning spring being connected to the compensation column.

[0009] As a further aspect of the present invention: the telescopic part includes a positioning block slidably installed in the central cavity, one end of the connecting cable located in the central cavity is connected to the positioning block, a first motor is fixedly installed at the end of the compensation column away from the main body of the flexible busbar, the output shaft of the first motor is fixedly connected to a take-up roller, a traction cable is wound on the surface of the take-up roller, and the end of the traction cable away from the take-up roller extends into the central cavity and is connected to the positioning block.

[0010] As a further aspect of the present invention: the locking part includes multiple guide grooves arranged in a ring on the side wall of the central cavity, multiple locking blocks are fixedly installed on the side wall of the positioning block, the locking blocks are slidably installed in the guide grooves, multiple parallel transverse grooves are opened on the side wall of the guide grooves, a locking groove is opened on the side of the transverse grooves away from the guide grooves, and a steering component is provided on the side wall of the positioning block, the steering component is used to control the positioning block to rotate around its own axis.

[0011] As a further aspect of the present invention: the steering component includes a side groove opened in the side wall of the positioning block, a second motor is fixedly installed in the side groove, and a positioning wheel is fixedly installed on the output shaft of the second motor. The positioning wheel is made of rubber material and extends to the outside of the side groove and fits against the inner side wall of the central cavity.

[0012] As a further aspect of the present invention: a column-type tension sensor is provided between the wire clamp and the connecting cable.

[0013] As a further aspect of the present invention, a temperature sensor is provided on the surface of the cross cylinder.

[0014] Compared with the prior art, the beneficial effects of the present invention are: by setting the elastic adjustment component and the cross cylinder to cooperate with each other, the flexible busbar body and the insulator string can be controlled to maintain an elastic expansion and contraction state. When the flexible busbar body swings due to strong wind, the flexible busbar body and the insulator string can expand and contract elastically on their own, which can effectively avoid drastic changes in tension at the end of the flexible busbar body. This solves the problem that the existing flexible busbar cannot adaptively adjust the tension, and the tension of the flexible busbar is prone to rise sharply, which can easily cause the flexible busbar to break.

[0015] By setting the locking part and the telescopic part to work together, the overall length of the flexible busbar body and the insulator string can be actively adjusted, thereby simultaneously adjusting the tightness of the flexible busbar body. This allows for active adjustment of the tension at the end of the flexible busbar body, further improving the performance of the flexible busbar body. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a substation flexible busbar tension adaptive compensation tensioning mechanism provided in an embodiment of the present invention.

[0017] Figure 2 This is a front view schematic diagram of a substation flexible busbar tension adaptive compensation tensioning mechanism provided in an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the cross cylinder in a substation flexible busbar tension adaptive compensation tensioning mechanism provided in an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the compensation column in a substation flexible busbar tension adaptive compensation tensioning mechanism provided in an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the positioning block and its connection structure in a substation flexible busbar tension adaptive compensation tensioning mechanism provided in an embodiment of the present invention. Figure 1 .

[0021] Figure 6 This is a schematic diagram of the positioning block and its connection structure in a substation flexible busbar tension adaptive compensation tensioning mechanism provided in an embodiment of the present invention. Figure 2 .

[0022] Figure 7 for Figure 4 A magnified structural diagram of A in the middle.

[0023] The components are: 1-main structure, 2-insulator string, 3-flexible busbar main body, 31-line clamp, 4-cross cylinder, 5-adaptive compensation mechanism, 51-elastic adjustment component, 511-compensation column, 512-central cavity, 513-end hole, 514-connecting cable, 515-positioning spring, 52-length adjustment component, 521-telescopic part, 5211-positioning block, 5212-traction cable, 5213-first motor, 5214-rewinding roller, 522-locking part, 5221-locking block, 5222-guide groove, 5223-cross groove, 5224-locking groove, 5225-steering component, 52251-side groove, 52252-second motor, 52253-positioning wheel, 6-column tension sensor, 7-temperature sensor. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0025] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0026] like Figure 1 , Figure 2 , Figure 3 The diagram shown illustrates the structure of a substation flexible busbar tension adaptive compensation tensioning mechanism according to an embodiment of the present invention. It includes a main frame 1 and a flexible busbar body 3. A clamp 31 is installed at one end of the flexible busbar body 3. An insulator string 2 is installed on the surface of the main frame 1. A horizontal cylinder 4 is located at the end of the insulator string 2 furthest from the main frame 1. An adaptive compensation mechanism 5 is installed inside the horizontal cylinder 4. The adaptive compensation mechanism 5 consists of an elastic adjustment component 51 and a length adjustment component 52. The elastic adjustment component 51 is located inside the horizontal cylinder 4. The cavity is connected to the clamp 31. The elastic adjustment component 51 is used to control the flexible busbar body 3 and the insulator string 2 to be in an elastic telescopic connection state. The length adjustment component 52 is composed of a telescopic part 521 and a locking part 522. The telescopic part 521 is located in the cavity of the horizontal cylinder 4 and is connected to the elastic adjustment component 51. The locking part 522 is connected to the telescopic part 521. The locking part 522 and the telescopic part 521 cooperate with each other to adjust the relative distance between the flexible busbar body 3 and the insulator string 2, thereby adjusting the tightness of the flexible busbar body 3.

[0027] During installation, the horizontal cylinder 4 is connected in series between the insulator string 2 and the flexible busbar body 3. The elastic adjustment component 51 positions the flexible busbar body 3 and the clamp 31. During use, when strong winds cause the flexible busbar body 3 to sway, the elastic adjustment component 51 controls the ends of the flexible busbar body 3 to remain in an elastic expansion and contraction state. The elastic adjustment component 51 can absorb the instantaneous impact load caused by the swaying of the flexible busbar body, avoiding sudden tension changes, and thus effectively preventing the flexible busbar body 3 from breaking at the clamp 31. The elastic adjustment component 51 can achieve rapid response adjustment even with slight tension changes.

[0028] During prolonged use, as the length of the flexible busbar body 3 elongates, the tension at its ends decreases. The telescopic part 521 automatically adjusts the overall length of the flexible busbar body 3 and the insulator string 2, thereby shortening the effective length of the flexible busbar body 3 and increasing its tension, bringing it back to the standard range. Conversely, when the length of the flexible busbar body 3 shortens, the tension at its ends increases. The telescopic part 521 then extends the overall length of the flexible busbar body 3 and the insulator string 2, thereby extending the effective length of the flexible busbar body 3 and reducing its tension, bringing it back to the standard range.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, in a preferred embodiment of the present invention, the elastic adjustment component 51 includes a compensation column 511 slidably mounted in the inner cavity of the horizontal cylinder 4 along the axial direction. The compensation column 511 has a central cavity 512 inside. The end of the horizontal cylinder 4 facing the flexible busbar body 3 has an end hole 513. A connecting cable 514 is fixedly mounted on the surface of the clamp 31. The end of the connecting cable 514 away from the clamp 31 extends through the end hole 513 into the central cavity 512 and is connected to the telescopic part 521. A positioning spring 515 is fixedly mounted in the inner cavity of the horizontal cylinder 4. The telescopic end of the positioning spring 515 is connected to the compensation column 511.

[0030] The positioning spring 515 elastically positions the compensating column 511 within the inner cavity of the cross cylinder 4, and the telescopic part 521 fixes the end position of the connecting cable 514 within the neutral cavity 512. The compensating column 511 and the connecting cable 514 are integrated into a single unit. During use, the compensating column 511 and the connecting cable 514 cooperate to traction and position the end of the flexible busbar body 3, keeping the end of the flexible busbar body 3 in an elastic telescopic state. The positioning spring 515 can absorb the instantaneous impact load caused by the swing of the flexible busbar body, avoiding sudden changes in tension, and thus effectively preventing the flexible busbar body 3 from breaking at the clamp 31.

[0031] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, in a preferred embodiment of the present invention, the telescopic part 521 includes a positioning block 5211 slidably installed in the central cavity 512. One end of the connecting cable 514 located in the central cavity 512 is connected to the positioning block 5211. A first motor 5213 is fixedly installed at the end of the compensation column 511 away from the flexible busbar body 3. The output shaft of the first motor 5213 is fixedly connected to a take-up roller 5214. A traction cable 5212 is wound on the surface of the take-up roller 5214. One end of the traction cable 5212 away from the take-up roller 5214 extends into the central cavity 512 and is connected to the positioning block 5211.

[0032] During use, the locking part 522 fixes the position of the positioning block 5211 within the central cavity 512, and the positioning block 5211 pulls and positions the connecting cable 514 and the flexible busbar body 3. When it is necessary to adjust the tension of the flexible busbar body 3, the locking part 522 releases the restriction on the positioning block 5211 within the central cavity 512, and the first motor 5213 drives the winding roller 5214 to rotate. During rotation, the winding roller 5214 winds or unwinds the traction cable 5212. The traction cable 5212 pulls the positioning block 5211 to slide within the central cavity 512, and the positioning block 5211 drives the connecting cable 514 and the flexible busbar body 3 to move synchronously, thereby adjusting the overall length of the flexible busbar body 3 and the insulator string 2. When the tension of the flexible busbar body 3 is adjusted to the standard range, the locking part 522 fixes the position of the positioning block 5211 within the central cavity 512, thereby stably positioning the flexible busbar body 3.

[0033] like Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, in a preferred embodiment of the present invention, the locking part 522 includes multiple guide grooves 5222 arranged in a ring on the side wall of the central cavity 512. Multiple locking blocks 5221 are fixedly installed on the side wall of the positioning block 5211. The locking blocks 5221 are slidably installed in the guide grooves 5222. Multiple parallel transverse grooves 5223 are provided on the side wall of the guide grooves 5222. A locking groove 5224 is provided on the side of the transverse grooves 5223 away from the guide grooves 5222. A steering member 5225 is provided on the side wall of the positioning block 5211. The steering member 5225 is used to control the positioning block 5211 to rotate around its own axis.

[0034] Initially, the locking block 5221 on the side wall of the positioning block 5211 slides freely in the guide groove 5222. At this time, the traction cable 5212 can pull the positioning block 5211 to move in the central cavity 512. When the positioning block 5211 moves to the appropriate position, the steering component 5225 controls the positioning block 5211 to rotate around its own axis. The positioning block 5211 drives the locking block 5221 to rotate synchronously. The locking block 5221 rotates from the guide groove 5222 to the transverse groove 5223 at the corresponding position. When the locking block 5221 moves in the transverse groove 5223 to the position aligned with the locking groove 5224, the traction cable 5212 releases the tension on the positioning block 5211. At this time, under the tension of the flexible busbar body 3 and the connecting cable 514, the locking block 5221 is stably locked in the locking groove 5224. The locking block 5221 and the locking groove 5224 cooperate to stably fix the positioning block 5211 in the central cavity 512. When it is necessary to adjust the tension of the flexible busbar body 3, the traction cable 5212 applies a pulling force to the positioning block 5211, thereby pulling the positioning block 5211 as a whole to move into the transverse groove 5223. At this time, the steering component 5225 controls the positioning block 5211 to rotate in the opposite direction, and the locking block 5221 on the side wall of the positioning block 5211 moves from the transverse groove 5223 into the guide groove 5222. At this time, the locking block 5221 releases its restriction on the positioning block 5211, and the traction cable 5212 can drive the positioning block 5211 to slide in the central cavity 512, thereby synchronously adjusting the tension of the flexible busbar body 3.

[0035] like Figure 5 , Figure 6 As shown, in a preferred embodiment of the present invention, the steering component 5225 includes a side groove 52251 formed in the side wall of the positioning block 5211. A second motor 52252 is fixedly installed in the side groove 52251. A positioning wheel 52253 is fixedly installed on the output shaft of the second motor 52252. The positioning wheel 52253 is made of rubber material and extends to the outside of the side groove 52251 and fits against the inner side wall of the central cavity 512.

[0036] When the position of the locking block 5221 needs to be adjusted, the second motor 52252 drives the positioning wheel 52253 to rotate. The positioning wheel 52253 rolls along the inner wall of the central cavity 512, which in turn drives the positioning block 5211 to rotate around its own axis, thereby driving the locking block 5221 to rotate synchronously.

[0037] like Figure 1 , Figure 2 , Figure 3 As shown, in a preferred embodiment of the present invention, a column-type tension sensor 6 is provided between the wire clamp 31 and the connecting cable 514.

[0038] The column-type tension sensor 6 is connected in series between the clamp 31 and the connecting cable 514, and can directly collect real-time axial tension data of the flexible busbar body 3.

[0039] like Figure 1 , Figure 2 , Figure 3 As shown, in a preferred embodiment of the present invention, a temperature sensor 7 is provided on the surface of the horizontal cylinder 4.

[0040] Temperature sensor 7 can monitor the air temperature change near the flexible busbar body 3 in real time. When the temperature change reaches the set threshold, the external control equipment can calculate the deformation of the flexible busbar body 3 according to the coefficient of linear expansion, thereby adjusting the extension stroke in advance to counteract the trend of thermal expansion and contraction and avoid large fluctuations in tension.

[0041] The working principle of this invention is as follows: During installation, the horizontal cylinder 4 is connected in series between the insulator string 2 and the flexible busbar body 3. The locking block 5221 and the locking groove 5224 cooperate with each other to stably fix the positioning block 5211 in the central cavity 512. The positioning block 5211 pulls and positions the connecting cable 514 and the flexible busbar body 3. The compensating column 511 and the connecting cable 514 are connected as a whole. During use, the compensating column 511 and the connecting cable 514 cooperate with each other to pull and position the end of the flexible busbar body 3, and the end of the flexible busbar body 3 is in an elastic extension and contraction state. The positioning spring 515 can absorb the instantaneous impact load brought by the swing of the flexible busbar body, avoid sudden tension changes, and thus effectively prevent the flexible busbar body 3 from breaking at the clamp 31.

[0042] When it is necessary to actively adjust the tension of the flexible busbar body 3, the traction cable 5212 applies a pulling force to the positioning block 5211, thereby pulling the positioning block 5211 to move as a whole into the transverse groove 5223. The second motor 52252 drives the positioning wheel 52253 to rotate. The positioning wheel 52253 rolls along the inner side wall of the central cavity 512, which in turn drives the positioning block 5211 to rotate around its own axis, thereby driving the locking block 5221 to rotate synchronously. The locking block 5221 at the side wall of the positioning block 5211 moves from the transverse groove 5223 into the guide groove 5222. At this time, the locking block 5221 releases its restriction on the positioning block 5211, and the traction cable 5212 can drive the positioning block 5211 to slide in the central cavity 512, thereby synchronously adjusting the tension of the flexible busbar body 3.

[0043] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A substation flexible busbar tension adaptive compensation tensioning mechanism, comprising a frame body (1) and a flexible busbar body (3), wherein a clamp (31) is installed at the end of the flexible busbar body (3), an insulator string (2) is installed on the surface of the frame body (1), a cross cylinder (4) is provided at the end of the insulator string (2) away from the frame body (1), and an adaptive compensation mechanism (5) is provided in the inner cavity of the cross cylinder (4), wherein the adaptive compensation mechanism (5) is composed of an elastic adjustment component (51) and a length adjustment component (52), wherein the elastic adjustment component (51) is provided in the inner cavity of the cross cylinder (4) and is connected to the clamp (31). The elastic adjustment component (51) is used to control the flexible busbar body (3) and the insulator string (2) to be in an elastic telescopic connection state. The length adjustment component (52) is composed of a telescopic part (521) and a locking part (522). The telescopic part (521) is located in the inner cavity of the horizontal cylinder (4) and is connected to the elastic adjustment component (51). The locking part (522) is connected to the telescopic part (521). The locking part (522) and the telescopic part (521) cooperate with each other to adjust the relative distance between the flexible busbar body (3) and the insulator string (2) and thus adjust the tightness of the flexible busbar body (3).

2. The substation flexible busbar tension adaptive compensation tensioning mechanism according to claim 1, characterized in that, The elastic adjustment assembly (51) includes a compensating column (511) that is slidably installed in the inner cavity of the horizontal cylinder (4) along the axial direction. The compensating column (511) has a central cavity (512) inside. The horizontal cylinder (4) has an end hole (513) at one end facing the flexible busbar body (3). A connecting cable (514) is fixedly installed on the surface of the clamp (31). The end of the connecting cable (514) away from the clamp (31) passes through the end hole (513) and extends into the central cavity (512) and is connected to the telescopic part (521). A positioning spring (515) is fixedly installed in the inner cavity of the horizontal cylinder (4). The telescopic end of the positioning spring (515) is connected to the compensating column (511).

3. The substation flexible busbar tension adaptive compensation tensioning mechanism according to claim 2, characterized in that, The telescopic part (521) includes a positioning block (5211) slidably installed in the central cavity (512). One end of the connecting cable (514) located in the central cavity (512) is connected to the positioning block (5211). A first motor (5213) is fixedly installed at one end of the compensation column (511) away from the flexible busbar body (3). The output shaft of the first motor (5213) is fixedly connected to a take-up roller (5214). A traction cable (5212) is wound on the surface of the take-up roller (5214). One end of the traction cable (5212) away from the take-up roller (5214) extends into the central cavity (512) and is connected to the positioning block (5211).

4. The substation flexible busbar tension adaptive compensation tensioning mechanism according to claim 3, characterized in that, The locking part (522) includes multiple guide grooves (5222) arranged in a ring on the side wall of the central cavity (512). Multiple locking blocks (5221) are fixedly installed on the side wall of the positioning block (5211). The locking blocks (5221) are slidably installed in the guide grooves (5222). Multiple parallel horizontal grooves (5223) are provided on the side wall of the guide grooves (5222). A locking groove (5224) is provided on the side of the horizontal grooves (5223) away from the guide grooves (5222). A steering component (5225) is provided on the side wall of the positioning block (5211). The steering component (5225) is used to control the positioning block (5211) to rotate around its own axis.

5. The substation flexible busbar tension adaptive compensation tensioning mechanism according to claim 4, characterized in that, The steering component (5225) includes a side groove (52251) opened on the side wall of the positioning block (5211). A second motor (52252) is fixedly installed in the side groove (52251). A positioning wheel (52253) is fixedly installed on the output shaft of the second motor (52252). The positioning wheel (52253) is made of rubber material and extends to the outside of the side groove (52251) and fits against the inner side wall of the central cavity (512).

6. The substation flexible busbar tension adaptive compensation tensioning mechanism according to claim 2, characterized in that, A column-type tension sensor (6) is provided between the clamp (31) and the connecting cable (514).

7. The substation flexible busbar tension adaptive compensation tensioning mechanism according to claim 1, characterized in that, A temperature sensor (7) is provided on the surface of the cross cylinder (4).

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