CN111640547B - Cross-over-gear tension-resistant double-hanging-point insulator string connecting structure and assembling method thereof - Google Patents
Cross-over-gear tension-resistant double-hanging-point insulator string connecting structure and assembling method thereof Download PDFInfo
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- CN111640547B CN111640547B CN202010356384.6A CN202010356384A CN111640547B CN 111640547 B CN111640547 B CN 111640547B CN 202010356384 A CN202010356384 A CN 202010356384A CN 111640547 B CN111640547 B CN 111640547B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/02—Suspension insulators; Strain insulators
- H01B17/06—Fastening of insulator to support, to conductor, or to adjoining insulator
- H01B17/10—Fastening of insulator to support, to conductor, or to adjoining insulator by intermediate link
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/02—Suspension insulators; Strain insulators
- H01B17/04—Chains; Multiple chains
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/02—Suspension insulators; Strain insulators
- H01B17/06—Fastening of insulator to support, to conductor, or to adjoining insulator
- H01B17/08—Fastening of insulator to support, to conductor, or to adjoining insulator by cap-and-bolt
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/38—Fittings, e.g. caps; Fastenings therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device
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Abstract
The invention relates to installation of a double-series insulator string, in particular to a spanning-gear strain-resistant double-hanging-point insulator string connecting structure and an assembling method thereof. Stride across a grade strain insulator pair of hanging point insulator string connection structure, including two insulator string, the one end of insulator string be provided with the linking arm that is used for connecting the hanging hole on the cross arm, the other end of insulator string is provided with the connecting strip, the linking arm on two insulator string corresponds respectively and articulates on two hanging holes on the cross arm, the connecting strip on two insulator string articulates on same connecting plate, the connecting plate is articulated with the cable, the centre of a circle of the pin joint of two connecting strips on the connecting plate and the centre of a circle of the pin joint of connecting plate and cable are located same straight line and are parallel with the centre of a circle line of two hanging holes on the cross arm. The invention has the advantages of improving the stress uniformity of the two insulator strings, avoiding the disconnection of the insulator string with overlarge stress and the like.
Description
Technical Field
The invention relates to installation of a double-series insulator string, in particular to a spanning-gear strain-resistant double-hanging-point insulator string connecting structure and an assembling method thereof.
Background
At present, strain insulator-strings adopt duplex strings for important spanning, such as 35kV and above power lines, provincial roads, national roads, expressways, main navigation rivers, houses and important communication lines. The existing double series connection usually adopts vertical double hanging points, namely two hanging holes are vertically arranged on a cross arm, the connecting line of the circle centers of the two hanging holes is usually on a vertical line, and each hanging hole is connected with an insulator string. And the three connection points of the end point of one end of the two insulator strings far away from the hanging hole and the end point of the cable connection end are generally connected to the same point in a triangular arrangement or overlapping manner, so that the two insulator strings are different in length and uneven in stress, and hidden troubles are caused to the power transmission stability.
Disclosure of Invention
The invention mainly aims at the problems and provides a spanning-gear strain double-hanging-point insulator string connecting structure and an assembling method thereof. The first invention aims to effectively improve the stress uniformity of two insulator strings and avoid the disconnection of the insulator string subjected to overlarge stress; the second invention aims to realize transverse buffering at one end of the insulator string far away from the hanging hole and effectively reduce the influence of transverse wind on the insulator string.
The first purpose of the invention is mainly realized by the following scheme: the utility model provides a stride across two hanging point insulator string connection structure of shelves strain insulator, includes two insulator string, the one end of insulator string be provided with the linking arm that is used for connecting the hanging hole on the cross arm, the other end of insulator string is provided with the connecting strip, the linking arm on two insulator string corresponds respectively and articulates on two hanging holes on the cross arm, the connecting strip on two insulator string articulates on same connecting plate, the connecting plate is articulated with the cable, the centre of a circle of the pin joint of two connecting strips on the connecting plate and the centre of a circle of the pin joint of connecting plate and cable are located same straight line and are parallel with the centre of a circle line of two hanging holes on the cross arm. The connecting arm of one end of the insulator string is hinged to the hanging hole on the cross arm, and then the connecting strips of the other ends of the two insulator strings are simultaneously connected to the same connecting plate, and connection is guaranteed, the circle centers of the hinged points of the two connecting strips on the connecting plate and the hinged points of the connecting plate and the cable are located on the same straight line and are parallel to the circle center connecting line of the two hanging holes on the cross arm, namely the connecting points of the connecting strips and the connecting plate of the two insulator strings and the connecting point of the connecting plate and the cable are located on the same straight line, so that the end points of the connecting arms of the two insulator strings and the end points of the connecting strips of the two insulator strings together form a parallelogram. The two insulator strings are always in a parallel state, and the stress of each point is uniform.
Preferably, the connecting plate is in a rhomboid shape, the cable is hinged to the center of the connecting plate, and a plurality of connecting holes for connecting the connecting strips are formed in the connecting plate. The connecting plate is rhomboid, so that the connecting point of the connecting strip and the connecting plate is more easily parallel to the connecting line of the two hanging points, and the two connecting holes with the same distance can be correspondingly selected according to the distance between the connecting lines of the two hanging points by adopting the arrangement of the plurality of connecting holes.
The second object of the present invention is achieved mainly by the following solutions: the connecting strip comprises a left clamping plate and a right clamping plate which are respectively positioned on two sides of the connecting plate, axial moving devices are arranged at the joints of the left clamping plate and the connecting plate, the left clamping plate and the right clamping plate and the connecting plate, the axial moving devices comprise a left pressing sheet and a right pressing sheet which are respectively positioned on two sides of the connecting plate, a pin bolt and a fastening nut, the left pressing sheet is positioned between the left clamping plate and the connecting plate, the right pressing sheet is positioned between the right clamping plate and the connecting plate, the pin bolt sequentially penetrates through the left clamping plate, the left pressing sheet, the connecting hole, the right pressing sheet and the right clamping plate, a first pressure spring is arranged between a pin bolt head and the left clamping plate, a second pressure spring is arranged between the left clamping plate and the left pressing sheet, a third pressure spring is arranged between the right pressing sheet and the right clamping plate, a fourth pressure spring is arranged between the right clamping plate and the fastening nut, and the first pressure spring, the second pressure spring, the third pressure spring and the fourth pressure spring are all sleeved on the pin bolt; the connecting hole department is provided with the pressure regulating gasket, the middle part of pressure regulating gasket outer wall is provided with the ring channel, the edge of connecting hole is located the ring channel, the axis department of pressure regulating gasket is provided with the mounting hole that is used for supplying the cotter to run through, the section diameter of mounting hole is crescent to both ends by the centre, be provided with the pressure regulating air ring between the edge of connecting hole and the tank bottom of ring channel, the pressure regulating air ring is cyclic annular and inside cavity, be provided with the air cock that has the check valve on the pressure regulating air ring outer wall, the inside packing of pressure regulating air ring has the air. The connecting strip adopts the double-layered dress mode of pressing from both sides of left splint and right splint, has still installed left preforming and right preforming respectively between left splint and right splint moreover, when the installation, is provided with first pressure spring between round pin head and the left splint, is provided with the second pressure spring between left splint and the left preforming, is provided with the third pressure spring between right preforming and the right splint, is provided with the fourth pressure spring between right splint and the fastening nut. Utilize the cotter pin can realize the axial rotation of connection piece and connecting hole, utilize first pressure spring, the second pressure spring, third pressure spring and fourth pressure spring can make the cotter pin head, left splint, left side preforming, right side preforming, all have certain interval between right splint and the fastening nut, when insulator chain meets the crosswind, left splint, left side preforming, right side splint and right preforming can take place axial displacement along the axis direction of cotter pin, this axial displacement can help insulator chain to comply with the wind-force of crosswind, and axial displacement can cause first pressure spring or second pressure spring or third pressure spring or fourth pressure spring between each other to receive the extrusion, the energy storage of extrusion in-process, not only can cushion the junction of insulator chain that receives the crosswind, and can reduce the rigid shear force of each part. Because the wind power of cross wind is instantaneously fluctuated, the fluctuation amplitude between the components is reduced by utilizing the first compression spring or the second compression spring or the third compression spring or the fourth compression spring. For example, when the connecting plate moves towards the direction of the right clamping plate, the first compression spring and the second compression spring can ensure that the relative positions of the pin head and the left clamping plate on the pin are not moved, namely, the fluctuation range between the components is reduced. The adjusting gasket is arranged at the connecting hole and is used for matching with the transverse movement of each component on the pin bolt, when the insulator string is transversely moved by transverse wind, the axis of the pin bolt deflects to locally extrude the adjusting gasket, the middle part of the outer wall of the adjusting gasket is provided with a ring groove, the edge of the connecting hole is positioned in the ring groove, the axis of the adjusting gasket is provided with a mounting hole for the pin bolt to penetrate through, the diameter of the section of the mounting hole is gradually increased from the middle to the two ends, namely, the adjusting gasket can be made of a metal sleeve, the two ends of the sleeve are reamed by using a reaming process, the ring groove can be formed while the mounting hole with a curved surface is formed, the enlarged part after reaming is used for compressing the connecting plate, and the assembly of the adjusting gasket and the connecting hole is realized. Before reaming, the pressure regulating air ring can be pre-installed between the edge of the connecting hole and the groove bottom of the annular groove. When the mounting hole of pressure regulating gasket received local pressure, the edge formation local pressure of regulation gasket to the connecting hole, and the air in the pressure regulating air ring can increase the bulk pressure of pressure regulating air ring, and when the local of pressure regulating air ring received external force extrusion, the air in the pressure regulating air ring flowed, and the air of pressurized position was extruded to the position of not atress and pressurized expansion energy storage, avoided the connecting hole to warp and tear even. In the field of high-voltage electricity, particularly for cable connection erected at high altitude, cross wind of an insulator string is ignored, in practical application, the insulator string is subjected to the main reason that the cross wind causes deformation and tearing of a rigidly connected pin bolt and a connecting hole, the insulator string can be prevented from being influenced by the cross wind by utilizing the movable left clamping plate, the movable left pressing sheet, the movable right clamping plate, the movable right pressing sheet and the movable right pressing sheet to be matched with the first pressure spring, the second pressure spring, the movable left pressing sheet, the movable right pressing sheet and the movable right pressing sheet to be flexibly connected with the first pressure spring, the movable second pressure spring, the movable third pressure spring and the movable fourth pressure spring, the deviation of the axis of a pin shaft caused by the cross wind is utilized, local pressure adjustment of a pressure adjusting gasket and a pressure adjusting air ring is matched on the basis of flexible connection, deformation and tearing of the connecting position can be avoided, the period of high-altitude maintenance is prolonged, the cost of the high-altitude maintenance is reduced, and the power transmission stability of a power transmission line is increased most importantly.
Preferably, the pressure regulating balloon is made of rubber materials, and the one-way valve comprises two cover plates which are arranged on the inner surface of the pressure regulating balloon and correspond to the air tap and cover the inner surface of the pressure regulating balloon and the air tap. The pressure regulating air ring is made of rubber materials, can be formed by an injection molding process, is similar to the processing process forming of automobile tires, and in the injection molding process, two cover plates which are mutually covered are formed on the inner surface of the position corresponding to the air faucet.
Preferably, the connecting strip is provided with a plurality of positioning holes at intervals. A plurality of positioning holes are also formed in the connecting strip, and the position of the appropriate positioning hole is selected according to the required length.
The assembling method of the spanning gear strain double-hanging-point insulator string connecting structure is characterized by comprising the following connecting steps of: 1) measuring the distance between the circle centers of the two hanging holes on the cross arm, and correspondingly selecting the mounting positions with the same distance on the connecting plate; 2) and the connecting arm at one end of the insulator string is hinged on the hanging hole, and the connecting strip at the other end of the insulator string is hinged on the corresponding connecting plate.
Preferably, in the step 2), a hollow adjusting air ring is processed through an injection molding process, air is filled into the adjusting air ring, a sleeve with the outer diameter smaller than that of the connecting hole is selected, the adjusting air ring is sleeved on the sleeve and is clamped between the edge of the connecting hole and the sleeve, the sleeve is expanded at two ends of the sleeve by using an expanding process to form a pressure adjusting gasket, and the expanded part is pressed on the connecting plate to realize the assembly of the pressure adjusting gasket and the connecting hole; the method comprises the steps of sleeving a pin bolt with a first pressure spring, penetrating the pin bolt through a left clamping plate, sleeving the pin bolt with a second pressure spring, penetrating the pin bolt through a left pressing plate, penetrating the pin bolt through a mounting hole and a right pressing plate on a pressure regulating gasket, sleeving the pin bolt with a third pressure spring, penetrating the pin bolt through a right clamping plate, sleeving the pin bolt with a fourth pressure spring, screwing a fastening bolt on the pin bolt, and completing the assembling operation of the step 2).
Therefore, the spanning-gear tension-resistant double-hanging-point insulator string connecting structure and the assembling method thereof have the following advantages: the connection points of the connecting strips of the two insulator strings and the connecting plate and the connection points of the connecting plate and the cable are positioned on the same straight line, so that the end points of the connecting arms of the two insulator strings and the end points of the connecting strips of the two insulator strings form a parallelogram. The two insulator strings are always in a parallel state, and the stress of each point is uniform.
Drawings
FIG. 1 is a schematic view of the structure of the present invention in example 1;
FIG. 2 is an enlarged partial cross-sectional view of the joint of the tie bar and the tie plate in embodiment 2;
FIG. 3 is an enlarged partial cross-sectional view of the connecting hole in embodiment 2;
FIG. 4 is an enlarged partial cross-sectional view of the pressure regulating balloon adjacent the air cap.
Illustration of the drawings: 1-cross arm, 2-hanging hole, 3-connecting arm, 4-insulator string, 5-connecting bar, 6-connecting plate, 7-cable, 8-connecting hole, 9-positioning hole, 10-pin bolt, 11-pin bolt head, 12-left clamping plate, 13-left pressing plate, 14-right pressing plate, 15-right clamping plate, 16-fastening nut, 17-first pressing spring, 18-second pressing spring, 19-third pressing spring, 20-fourth pressing spring, 21-pressure regulating gasket, 22-pressure regulating air ring, 23-mounting hole, 24-air nozzle and 25-cover plate.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example 1:
as shown in fig. 1, a stride across shelves strain insulator string connection structure of two hanging points, including two insulator chain, the one end of insulator chain 4 is provided with the linking arm 3 that is used for connecting the hanging hole on cross arm 1, the other end of insulator chain is provided with the connecting strip, the linking arm on two insulator chain corresponds respectively and articulates on two hanging holes 2 on the cross arm, the connecting strip 5 on two insulator chain articulates on same connecting plate 6, the connecting plate is articulated with the cable, the centre of a circle of the pin joint of two connecting strips on the connecting plate and the centre of a circle of the pin joint of connecting plate and cable 7 are located same straight line and are parallel with the centre of a circle line of two hanging holes on the cross arm. The connecting plate is rhomboid, and the cable articulates the central point in the connecting plate and puts, sets up a plurality of connecting hole 8 that are used for connecting the connecting strip on the connecting plate. A plurality of positioning holes 9 are arranged on the connecting strip at intervals.
The assembly method of the spanning-gear strain double-hanging-point insulator string connecting structure is characterized by comprising the following connecting steps: 1) measuring the distance between the circle centers of the two hanging holes on the cross arm, and correspondingly selecting the mounting positions with the same distance on the connecting plate; 2) and the connecting arm at one end of the insulator string is hinged on the hanging hole, and the connecting strip at the other end of the insulator string is hinged on the corresponding connecting plate.
The connecting arm of one end of the insulator string is hinged to the hanging hole on the cross arm, and then the connecting strips of the other ends of the two insulator strings are simultaneously connected to the same connecting plate, and connection is guaranteed, the circle centers of the hinged points of the two connecting strips on the connecting plate and the hinged points of the connecting plate and the cable are located on the same straight line and are parallel to the circle center connecting line of the two hanging holes on the cross arm, namely the connecting points of the connecting strips and the connecting plate of the two insulator strings and the connecting point of the connecting plate and the cable are located on the same straight line, so that the end points of the connecting arms of the two insulator strings and the end points of the connecting strips of the two insulator strings together form a parallelogram. The two insulator strings are always in a parallel state, and the stress of each point is uniform. The connecting plate is rhomboid, so that the connecting point of the connecting strip and the connecting plate is more easily parallel to the connecting line of the two hanging points, and the two connecting holes with the same distance can be correspondingly selected according to the distance between the connecting lines of the two hanging points by adopting the arrangement of the plurality of connecting holes.
Example 2: the structure of this embodiment is basically the same as that of embodiment 1, and the difference is that, as shown in fig. 2, 3, and 4, the connecting strip includes a left clamp plate and a right clamp plate respectively located at two sides of the connecting plate, axial moving devices are disposed at the joints of the left clamp plate and the right clamp plate and the connecting plate, the axial moving devices include a left pressing sheet and a right pressing sheet respectively located at two sides of the connecting plate, a pin 10 and a fastening nut 16, the left pressing sheet is located between the left clamp plate and the connecting plate, the right pressing sheet is located between the right clamp plate and the connecting plate, the pin sequentially penetrates through the left clamp plate 12, the left pressing sheet 13, the connecting hole, the right pressing sheet 14 and the right clamp plate 15, a first pressure spring is disposed between the pin head 11 and the left clamp plate, a second pressure spring is disposed between the left clamp plate and the left pressing sheet, a third pressure spring is disposed between the right pressing sheet and the right clamp plate, a fourth pressure spring is disposed between the right clamp plate and the fastening nut, the first pressure spring 17, the second pressure spring 18, The third pressure spring 19 and the fourth pressure spring 20 are sleeved on the pin bolt; the connecting hole department is provided with pressure regulating gasket 21, the middle part of pressure regulating gasket outer wall is provided with the ring channel, the edge of connecting hole is located the ring channel, the axis department of pressure regulating gasket is provided with the mounting hole 23 that is used for supplying the cotter to run through, the section diameter of mounting hole is crescent to both ends by the centre, be provided with pressure regulating ring air 22 between the edge of connecting hole and the tank bottom of ring channel, pressure regulating ring air is cyclic annular and inside cavity, be provided with the air cock 24 that has the check valve on the pressure regulating ring air wall, the inside packing of pressure regulating ring air has the air. The pressure regulating air ring is made of rubber materials, and the one-way valve comprises two cover plates 25 which are arranged on the inner surface of the pressure regulating air ring and correspond to the air tap and are covered with each other.
Processing a hollow adjusting air ring inside by an injection molding process, filling air into the adjusting air ring, selecting a sleeve with the outer diameter smaller than that of a connecting hole, sleeving the adjusting air ring on the sleeve, clamping the adjusting air ring between the edge of the connecting hole and the sleeve, expanding holes at two ends of the sleeve by using an expanding hole process to form a pressure adjusting gasket on the sleeve, and pressing the expanded part on a connecting plate to realize the assembly of the pressure adjusting gasket and the connecting hole; the method comprises the steps of sleeving a pin bolt with a first pressure spring, penetrating the pin bolt through a left clamping plate, sleeving the pin bolt with a second pressure spring, penetrating the pin bolt through a left pressing plate, penetrating the pin bolt through a mounting hole and a right pressing plate on a pressure regulating gasket, sleeving the pin bolt with a third pressure spring, penetrating the pin bolt through a right clamping plate, sleeving the pin bolt with a fourth pressure spring, screwing a fastening bolt on the pin bolt, and completing the assembling operation of the step 2).
The connecting strip adopts the double-layered dress mode of pressing from both sides of left splint and right splint, has still installed left preforming and right preforming respectively between left splint and right splint moreover, when the installation, is provided with first pressure spring between round pin head and the left splint, is provided with the second pressure spring between left splint and the left preforming, is provided with the third pressure spring between right preforming and the right splint, is provided with the fourth pressure spring between right splint and the fastening nut. Utilize the cotter pin can realize the axial rotation of connection piece and connecting hole, utilize first pressure spring, the second pressure spring, third pressure spring and fourth pressure spring can make the cotter pin head, left splint, left side preforming, right side preforming, all have certain interval between right splint and the fastening nut, when insulator chain meets the crosswind, left splint, left side preforming, right side splint and right preforming can take place axial displacement along the axis direction of cotter pin, this axial displacement can help insulator chain to comply with the wind-force of crosswind, and axial displacement can cause first pressure spring or second pressure spring or third pressure spring or fourth pressure spring between each other to receive the extrusion, the energy storage of extrusion in-process, not only can cushion the junction of insulator chain that receives the crosswind, and can reduce the rigid shear force of each part. Because the wind power of cross wind is instantaneously fluctuated, the fluctuation amplitude between the components is reduced by utilizing the first compression spring or the second compression spring or the third compression spring or the fourth compression spring. For example, when the connecting plate moves towards the direction of the right clamping plate, the first compression spring and the second compression spring can ensure that the relative positions of the pin head and the left clamping plate on the pin are not moved, namely, the fluctuation range between the components is reduced. The adjusting gasket is arranged at the connecting hole and is used for matching with the transverse movement of each component on the pin bolt, when the insulator string is transversely moved by transverse wind, the axis of the pin bolt deflects to locally extrude the adjusting gasket, the middle part of the outer wall of the adjusting gasket is provided with a ring groove, the edge of the connecting hole is positioned in the ring groove, the axis of the adjusting gasket is provided with a mounting hole for the pin bolt to penetrate through, the diameter of the section of the mounting hole is gradually increased from the middle to the two ends, namely, the adjusting gasket can be made of a metal sleeve, the two ends of the sleeve are reamed by using a reaming process, the ring groove can be formed while the mounting hole with a curved surface is formed, the enlarged part after reaming is used for compressing the connecting plate, and the assembly of the adjusting gasket and the connecting hole is realized. Before reaming, the pressure regulating air ring can be pre-installed between the edge of the connecting hole and the groove bottom of the annular groove. When the mounting hole of pressure regulating gasket received local pressure, the edge formation local pressure of regulation gasket to the connecting hole, and the air in the pressure regulating air ring can increase the bulk pressure of pressure regulating air ring, and when the local of pressure regulating air ring received external force extrusion, the air in the pressure regulating air ring flowed, and the air of pressurized position was extruded to the position of not atress and pressurized expansion energy storage, avoided the connecting hole to warp and tear even. In the field of high-voltage electricity, particularly for cable connection erected at high altitude, cross wind of an insulator string is ignored, in practical application, the insulator string is subjected to the main reason that the cross wind causes deformation and tearing of a rigidly connected pin bolt and a connecting hole, the insulator string can be prevented from being influenced by the cross wind by utilizing the movable left clamping plate, the movable left pressing sheet, the movable right clamping plate, the movable right pressing sheet and the movable right pressing sheet to be matched with the first pressure spring, the second pressure spring, the movable left pressing sheet, the movable right pressing sheet and the movable right pressing sheet to be flexibly connected with the first pressure spring, the movable second pressure spring, the movable third pressure spring and the movable fourth pressure spring, the deviation of the axis of a pin shaft caused by the cross wind is utilized, local pressure adjustment of a pressure adjusting gasket and a pressure adjusting air ring is matched on the basis of flexible connection, deformation and tearing of the connecting position can be avoided, the period of high-altitude maintenance is prolonged, the cost of the high-altitude maintenance is reduced, and the power transmission stability of a power transmission line is increased most importantly. The pressure regulating air ring is made of rubber materials, can be formed by an injection molding process, is similar to the processing process forming of automobile tires, and in the injection molding process, two cover plates which are mutually covered are formed on the inner surface of the position corresponding to the air faucet.
It should be understood that this example is only for illustrating the present invention and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (5)
1. A span strain insulator double-hanging-point insulator string connecting structure comprises two insulator strings and is characterized in that one end of each insulator string is provided with a connecting arm used for connecting hanging holes on a cross arm, the other end of each insulator string is provided with a connecting strip, the connecting arms on the two insulator strings are correspondingly hinged on the two hanging holes on the cross arm respectively, the connecting strips on the two insulator strings are hinged on the same connecting plate, the connecting plate is hinged with a cable, the circle centers of the hinged joints of the two connecting strips on the connecting plate and the cable are positioned on the same straight line and are parallel to the line connecting the circle centers of the two hanging holes on the cross arm; the connecting plate is in a rhomboid shape, the cable is hinged at the central position of the connecting plate, and a plurality of connecting holes for connecting the connecting strips are formed in the connecting plate; the connecting strip comprises a left clamping plate and a right clamping plate which are respectively positioned on two sides of the connecting plate, axial moving devices are arranged at the joints of the left clamping plate and the connecting plate, the left clamping plate and the right clamping plate and the connecting plate, the axial moving devices comprise a left pressing sheet and a right pressing sheet which are respectively positioned on two sides of the connecting plate, a pin bolt and a fastening nut, the left pressing sheet is positioned between the left clamping plate and the connecting plate, the right pressing sheet is positioned between the right clamping plate and the connecting plate, the pin bolt sequentially penetrates through the left clamping plate, the left pressing sheet, the connecting hole, the right pressing sheet and the right clamping plate, a first pressure spring is arranged between a pin bolt head and the left clamping plate, a second pressure spring is arranged between the left clamping plate and the left pressing sheet, a third pressure spring is arranged between the right pressing sheet and the right clamping plate, a fourth pressure spring is arranged between the right clamping plate and the fastening nut, and the first pressure spring, the second pressure spring, the third pressure spring and the fourth pressure spring are all sleeved on the pin bolt; the connecting hole department is provided with the pressure regulating gasket, the middle part of pressure regulating gasket outer wall is provided with the ring channel, the edge of connecting hole is located the ring channel, the axis department of pressure regulating gasket is provided with the mounting hole that is used for supplying the cotter to run through, the section diameter of mounting hole is crescent to both ends by the centre, be provided with the pressure regulating air ring between the edge of connecting hole and the tank bottom of ring channel, the pressure regulating air ring is cyclic annular and inside cavity, be provided with the air cock that has the check valve on the pressure regulating air ring outer wall, the inside packing of pressure regulating air ring has the air.
2. The connection structure of a spanning tension double hanging point insulator string according to claim 1, wherein the pressure regulating air ring is made of rubber material, and the check valve comprises two mutually covering cover plates arranged at the position corresponding to the air tap on the inner surface of the pressure regulating air ring.
3. The connection structure of a spanning strain double hanging point insulator string according to claim 1 or 2, wherein a plurality of positioning holes are arranged on the connection strip at intervals.
4. A method for assembling a spanning-gear tension-resistant double-hanging-point insulator string connecting structure according to any one of claims 1 to 3, wherein the connecting steps are as follows: 1) measuring the distance between the circle centers of the two hanging holes on the cross arm, and correspondingly selecting the mounting positions with the same distance on the connecting plate; 2) and the connecting arm at one end of the insulator string is hinged on the hanging hole, and the connecting strip at the other end of the insulator string is hinged on the corresponding connecting plate.
5. The assembling method according to claim 4, wherein in the step 2), a hollow adjusting air ring is processed through an injection molding process, air is filled into the adjusting air ring, a sleeve with the outer diameter smaller than that of the connecting hole is selected, the adjusting air ring is sleeved on the sleeve and is clamped between the edge of the connecting hole and the sleeve, the sleeve is expanded at two ends of the sleeve by using an expanding process to form a pressure regulating gasket, and the expanded part is pressed on the connecting plate to realize the assembling of the pressure regulating gasket and the connecting hole; the method comprises the steps of sleeving a pin bolt with a first pressure spring, penetrating the pin bolt through a left clamping plate, sleeving the pin bolt with a second pressure spring, penetrating the pin bolt through a left pressing plate, penetrating the pin bolt through a mounting hole and a right pressing plate on a pressure regulating gasket, sleeving the pin bolt with a third pressure spring, penetrating the pin bolt through a right clamping plate, sleeving the pin bolt with a fourth pressure spring, screwing a fastening bolt on the pin bolt, and completing the assembling operation of the step 2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356384.6A CN111640547B (en) | 2020-04-29 | 2020-04-29 | Cross-over-gear tension-resistant double-hanging-point insulator string connecting structure and assembling method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356384.6A CN111640547B (en) | 2020-04-29 | 2020-04-29 | Cross-over-gear tension-resistant double-hanging-point insulator string connecting structure and assembling method thereof |
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| CN111640547A CN111640547A (en) | 2020-09-08 |
| CN111640547B true CN111640547B (en) | 2021-11-26 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3345838B2 (en) * | 1992-12-25 | 2002-11-18 | 古河電気工業株式会社 | Insulator arm of power transmission tower |
| JP4201387B2 (en) * | 1998-06-05 | 2008-12-24 | 旭テック株式会社 | Suspended tension device |
| CN201238177Y (en) * | 2008-07-28 | 2009-05-13 | 国网北京电力建设研究院 | Column-connected hardware fittings for strain insulator string of ultrahigh voltage transmission line |
| CN104361958B (en) * | 2014-11-20 | 2018-08-14 | 国家电网公司 | A kind of 5-linked double hanging point insulator resistant string |
| CN208722656U (en) * | 2018-09-16 | 2019-04-09 | 湖南兴诚电瓷电器有限公司 | A kind of 10kV high-tension electricity insulator resistant to high temperature |
| CN109494025B (en) * | 2018-10-24 | 2023-05-23 | 中国电力科学研究院有限公司 | Trigeminy I type string that hangs |
| CN209859707U (en) * | 2019-03-26 | 2019-12-27 | 国网湖北省电力有限公司荆门供电公司 | Buffer type insulator suspension device for electric power |
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