A pendant string structure

Abstract

The present application provides a kind of overhang string structure, which suspends / anchors overhead transmission line on tower, and the overhang string structure includes overhang string left limb, overhang string right limb, first ring structure (17), second ring structure (9) and suspension structure;Overhang string left limb is located in the upper left of suspension structure, which is connected to suspension structure by first ring structure (17), overhang string right limb is located in the upper right of suspension structure, which is connected to suspension structure by second ring structure (9), the size of first ring structure (17) and second ring structure (9) are all proportional to the design breaking load of overhang string structure, which reduces the repair difficulty and repair cost of overhang string.The present application determines the failure sequence of each component in overhead transmission line based on mechanical strength matching theory, which protects other components of overhead transmission line, and does not easily damage overhead transmission line and tower, and reduces the repair workload of overhang string, improves the repair efficiency, and reduces economic loss.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission lines, and in particular to a suspension string structure. Background Art

[0002] A hardware string is a structure composed of various hardware components. Its primary function is to suspend / anchor overhead transmission lines to towers. Hardware strings can be categorized into suspension strings, tension strings, and jumper strings based on their intended use. Hardware strings are primarily designed based on line parameters. Suspension strings are designed to match the strength of the overhead transmission line's deadweight, icing, and wind loads, while tension strings are designed to match the tensile strength of the overhead transmission line. Currently, V-shaped suspension strings are commonly used in engineering projects. These V-shaped suspension strings, when applied to straight towers, can reduce wind deflection and line spacing, limit insulator sway, and reduce tower head size and line corridor width.

[0003] During the actual operation of overhead transmission lines, the product value, difficulty of repair and cost of different components are different. The failure order of each component of the suspension string in the existing technology cannot be determined, resulting in great difficulty and high cost in repairing the suspension string. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art in that emergency repair is difficult and the emergency repair cost is high, the present invention provides a suspension string structure, which suspends / anchors an overhead transmission line on an iron tower. The suspension string structure comprises a left limb of the suspension string, a right limb of the suspension string, a first ring structure (17), a second ring structure (9) and a suspension structure; the left limb of the suspension string is located at the upper left of the suspension structure and is connected to the suspension structure through the first ring structure (17); the right limb of the suspension string is located at the upper right of the suspension structure and is connected to the suspension structure through the second ring structure (9); the sizes of the first ring structure (17) and the second ring structure (9) are both proportional to the design failure load of the suspension string structure; the sizes of the first ring structure (17) and the second ring structure (9) are determined based on the design failure load, so that they become weak links, thereby reducing the emergency repair difficulty and emergency repair cost of the suspension string.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0006] The present invention provides a suspension string structure for suspending / anchoring an overhead transmission line on an iron tower. The suspension string structure comprises a left limb of the suspension string, a right limb of the suspension string, a first ring structure (17), a second ring structure (9) and a suspension structure.

[0007] The left limb of the suspension string is located at the upper left of the suspension structure and is connected to the suspension structure via a first ring structure (17); the right limb of the suspension string is located at the upper right of the suspension structure and is connected to the suspension structure via a second ring structure (9);

[0008] The sizes of the first ring structure (17) and the second ring structure (9) are proportional to the design failure load of the suspension string structure. The sizes of the first ring structure (17) and the second ring structure (9) are determined based on the design failure load, making them weak links.

[0009] The suspension structure comprises a suspension link plate (10), a suspension wire clamp (11) and a weight plate (12);

[0010] The hanging link plate (10) is provided with hanging holes, and the hanging holes are distributed along the circumference in the plane of the hanging link plate (10);

[0011] The suspension wire clamp (11) is fixed to the hanging hole by means of bolts, and the weight piece (12) is fixed to the center position of the suspension link plate (10) by means of bolts.

[0012] The suspension wire clamp (11) comprises a boat-shaped wire clamp body (13), a wire clamp pressure plate (14) and a UB hanging plate (15);

[0013] The wire clamp pressure plate (14) is used to fix the overhead power transmission line and is connected to the ship-shaped wire clamp body (13) via bolts;

[0014] The upper end of the UB hanging plate (15) is provided with a first through hole, and the lower end thereof is provided with a second through hole. The upper end of the UB hanging plate (15) is connected to the suspension connecting plate (10) through the first through hole and a bolt, and the lower end thereof is connected to the top of the boat-shaped wire clamp body (13) through the second through hole and a bolt.

[0015] The first through hole is a cloud-shaped through hole, and the second through hole is a circular through hole.

[0016] The left limb and the right limb of the suspension string both comprise a voltage-equalizing ring (7), and an EB hanging plate (1), a third ring structure (2), a DB adjustment plate (3), a TP adjustment plate (4), a U-shaped hanging ring (16), a ball head hanging ring (5), an insulator (6), and a bowl head hanging plate (8) connected in sequence by bolts;

[0017] The EB hanging plate (1) is hung on the iron tower, and the grading ring (7) is sleeved on the outside of the insulator (6).

[0018] The sizes of the U-shaped hanging ring (16) and the ball head hanging ring (5) are proportional to the design failure load of the suspension string structure. The sizes of the U-shaped hanging ring (16) and the ball head hanging ring (5) are determined based on the design failure load, making them weak links.

[0019] The first ring structure, the second ring structure and the third ring structure (2) each comprise two U-shaped hanging rings connected back to back.

[0020] One of the U-shaped hanging rings of the first ring structure / second ring structure is connected to the bowl head hanging plate (8), and the other U-shaped hanging ring is connected to the hanging connecting plate (10).

[0021] One of the U-shaped hanging rings of the third ring structure (2) is connected to the EB hanging plate (1), and the other U-shaped hanging ring is connected to the DB adjustment plate (3).

[0022] The rod diameters of the U-shaped hanging ring (16), the ball head hanging ring (5) and the back-to-back connected U-shaped structure hanging rings are all 18.5 mm to 38 mm.

[0023] The U-shaped hanging ring, the ball head hanging ring (5) and the hanging rings of the U-shaped structure connected back to back are all formed through two forging processes, and the bowl head hanging plate (8) is formed through a forging process and a machining process.

[0024] The number of the suspension wire clamps (11) is 2 to 8 and is an even number;

[0025] The centers of the suspension clamps (11) are located on the circumference of the same circle.

[0026] The actual failure load of the suspension string structure is more than 1.2 times the design failure load.

[0027] Compared with the closest existing technology, the technical solution provided by the present invention has the following beneficial effects:

[0028] The suspension string structure provided by the present invention suspends / anchors an overhead power transmission line on an iron tower, and comprises a left limb of the suspension string, a right limb of the suspension string, a first ring structure (17), a second ring structure (9) and a suspension structure; the left limb of the suspension string is located at the upper left of the suspension structure and is connected to the suspension structure via the first ring structure (17); the right limb of the suspension string is located at the upper right of the suspension structure and is connected to the suspension structure via the second ring structure (9); the sizes of the first ring structure (17) and the second ring structure (9) are both proportional to the design failure load of the suspension string structure; the sizes of the first ring structure (17) and the second ring structure (9) are determined based on the design failure load to make them weak links; the first ring structure (17) and the second ring structure (9) are set as weak links, and the two ring structures fail first under extreme or special conditions, thereby reducing the difficulty and cost of emergency repair of the suspension string;

[0029] The suspension string structure provided by the present invention determines the failure order of each component in the overhead transmission line based on the mechanical strength matching theory. Under extreme or special conditions, each component can be destroyed in the order of failure of hardware, insulators, overhead transmission line and iron tower. This protects other components of the overhead transmission line and prevents easy damage to the overhead transmission line and iron tower. It also reduces the workload of emergency repair of the suspension string, improves emergency repair efficiency, and reduces economic losses.

[0030] In the suspension string structure provided by the present invention, the bowl head hanging plate is formed by a forging process and a machining process, and the U-shaped hanging rings in the first ring structure (17) and the second ring structure (9) are formed by two forging processes. Specifically, the strength level of the bowl head hanging plate rod diameter and the U-shaped hanging ring rod diameter is reduced, and the bowl head hanging plate (8) and the U-shaped hanging ring are both set as weak links, thereby ensuring the failure order of each component;

[0031] The present invention also sets the suspension wire clamp as a weak link, that is, when the unbalanced tension on the left and right sides of the suspension wire clamp is too large, the overhead transmission line is released along the direction of the overhead transmission line by breaking the wire clamp pressure plate (14) or the bolt, thereby ensuring that the iron tower is not damaged due to the influence of the tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 2. It is a schematic diagram of the structure of the suspension string in an embodiment of the present invention;

[0033] Figure 2 This is a front view of a suspension wire clamp according to an embodiment of the present invention;

[0034] Figure 3 is a side view of a suspension wire clamp according to an embodiment of the present invention;

[0035] Figure 4 This is a front view of a U-shaped hanging ring / back-to-back connected U-shaped structure in an embodiment of the present invention;

[0036] Figure 5 This is a right side view of the U-shaped hanging ring / back-to-back connected U-shaped structure in an embodiment of the present invention;

[0037] Figure 6 This is a front view of the bowl head hanging plate in an embodiment of the present invention;

[0038] Figure 7 This is a side view of the bowl head hanging plate in an embodiment of the present invention;

[0039] Figure 8 This is a top view of the bowl head hanging plate in an embodiment of the present invention;

[0040] Figure 9 This is a front view of the UB hanging board in an embodiment of the present invention;

[0041] Figure 10 This is a side view of the UB hanging plate in an embodiment of the present invention;

[0042] Figure 11 This is a front view of the ball head hanging ring in an embodiment of the present invention;

[0043] Figure 12 1 is a side view of a ball head hanging ring according to an embodiment of the present invention;

[0044] In the figure, 1. EB hanging plate, 2. third ring structure, 3. DB adjustment plate, 4. TP adjustment plate, 5. ball head hanging ring, 6. insulator, 7. equalizing ring, 8. bowl head hanging plate, 9. second ring structure, 10. suspension connecting plate, 11. suspension wire clamp, 12. weight plate, 13. boat-shaped wire clamp body, 14. wire clamp pressure plate, 15. UB hanging plate, 16. U-shaped hanging ring, 17. first ring structure. DETAILED DESCRIPTION

[0045] The present invention will be described in further detail below with reference to the accompanying drawings.

[0046] An embodiment of the present invention provides a suspension string structure, which suspends / anchors an overhead transmission line on a tower. The suspension string structure is V-shaped and includes a left limb of the suspension string, a right limb of the suspension string, a first ring structure 17, a second ring structure 9, and a suspension structure.

[0047] The left limb of the suspension string is located at the upper left of the suspension structure, and is connected to the suspension structure through the first ring structure 17. The right limb of the suspension string is located at the upper right of the suspension structure, and is connected to the suspension structure through the second ring structure 9. The sizes of the first ring structure 17 and the second ring structure 9 are proportional to the design failure load of the suspension string structure. The sizes of the first ring structure 17 and the second ring structure 9 are determined based on the design failure load, making them weak links.

[0048] The suspension structure includes a suspension connecting plate 10, a suspension wire clamp 11 and a weight piece 12;

[0049] The hanging connecting plate 10 is provided with hanging holes, which are distributed along the circumference in the plane of the hanging connecting plate 10;

[0050] The suspension clamp 11 is fixed to the hanging hole by means of bolts, and the weight piece 12 is fixed to the center position of the suspension link plate 10 by means of bolts. The embodiment of the present invention adopts a six-split suspension link plate.

[0051] like Figure 2 and Figure 3 The suspension clamp 11 includes a boat-shaped clamp body 13, a clamp pressure plate 14 and a UB hanging plate 15;

[0052] The clamp plate 14 is used to secure the overhead transmission line. It is bolted to the boat-shaped clamp body 13, allowing the overhead transmission line to pass through it. If the unbalanced tension on the left and right sides of the suspension clamp becomes excessive, the clamp plate 14 or the bolts break, releasing the overhead transmission line in the direction of the line, protecting the tower from damage due to tension.

[0053] like Figure 9 and Figure 10The upper end of the UB hanging plate 15 is provided with a first through hole, and the lower end thereof is provided with a second through hole. The upper end of the UB hanging plate 15 is connected to the suspension connecting plate 10 through the first through hole and a bolt, and the lower end thereof is connected to the top of the boat-shaped wire clamp body 13 through the second through hole and a bolt.

[0054] The first through hole is a cloud-shaped through hole, which ensures that the bolt can move relatively in the cloud-shaped through hole. In the embodiment of the present invention, the shape of the first through hole is as follows: Figure 9 The shape shown; the second through hole is a circular through hole.

[0055] The left and right limbs of the suspension string each include a grading ring 7 and an EB hanging plate 1, a third ring structure 2, a DB adjustment plate 3, a TP adjustment plate 4, a U-shaped hanging ring 16, a ball head hanging ring 5, an insulator 6 and a bowl head hanging plate 8 connected in sequence by bolts;

[0056] The EB hanging plate 1 is hung on the iron tower, and the grading ring 7 is sleeved on the outside of the insulator 6.

[0057] The third ring structure 2 includes two U-shaped hanging rings connected back to back.

[0058] One of the U-shaped hanging rings of the first ring structure / the second ring structure is connected to the bowl head hanging plate 8, and the other U-shaped hanging ring is connected to the hanging connecting plate 10.

[0059] One of the U-shaped hanging rings of the third ring structure 2 is connected to the EB hanging plate 1 , and the other U-shaped hanging ring is connected to the DB adjustment plate 3 .

[0060] Since the U-shaped hanging ring 16, the ball head hanging ring 5, and the hanging rings of the back-to-back U-shaped structure are all rod diameter structures, the sizes of the U-shaped hanging ring 16, the ball head hanging ring 5, and the hanging rings of the back-to-back U-shaped structure are determined based on the design failure load of the suspension string structure. The actual failure load is more than 1.2 times the design failure load. In the embodiment of the present invention, 1.2 times is used, specifically as follows:

[0061] When the design failure load of the suspension string structure is 210kN, the rod diameters of the U-shaped hanging ring 16, the ball head hanging ring 5, and the hanging rings of the back-to-back U-shaped structure are all designed to be 18.5mm. This designed rod diameter enables the U-shaped hanging ring 16, the ball head hanging ring 5, and the hanging rings of the back-to-back U-shaped structure to fail when the actual failure load reaches 252kN.

[0062] When the suspension string structure is subjected to a destructive load of 550 kN, the rod diameters of the U-shaped hanging ring 16, the ball head hanging ring 5, and the hanging rings of the back-to-back U-shaped structure are all designed to be 28 mm. This designed rod diameter enables the U-shaped hanging ring 16, the ball head hanging ring 5, and the hanging rings of the back-to-back U-shaped structure to be destroyed when the actual destructive load reaches 660 kN.

[0063] When the suspension string structure is subjected to a breaking load of 840 kN, the rod diameters of the U-shaped hanging ring 16, the ball head hanging ring 5, and the hanging rings of the back-to-back U-shaped structure are all designed to be 38 mm. This designed rod diameter enables the U-shaped hanging ring 16, the ball head hanging ring 5, and the hanging rings of the back-to-back U-shaped structure to fail when the actual breaking load reaches 1008 kN.

[0064] In order to design the above dimensions, the U-shaped hanging ring 16, the ball head hanging ring 5 and the hanging rings of the back-to-back U-shaped structure are all formed by two forging processes, which can reduce the strength level of the rod diameter of the U-shaped hanging ring 16, the ball head hanging ring 5 and the hanging rings of the back-to-back U-shaped structure. The specific structure of the U-shaped hanging ring 16 / the hanging rings of the back-to-back U-shaped structure is as follows Figure 4 and Figure 5 As shown, the specific structure of the ball head hanging ring 5 is as follows Figure 11 and Figure 12 As shown, the bowl head hanging plate 8 is formed by forging and machining processes, which reduces the strength level of the rod diameter of the bowl head hanging plate 8. The specific structure of the bowl head hanging plate 8 is as follows Figure 6-8 The ball head hanging ring 5, the bowl head hanging plate 8 and the U-shaped hanging ring are all set as weak links to ensure the failure order of each component.

[0065] The number of the suspension clamps 11 is 2 to 8 and is an even number. In the embodiment of the present invention, 6 suspension clamps are used. Figure 1 As shown; the centers of the various suspension clamps 11 are located on the circumference of the same circle.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Ordinary technicians in the relevant field can still modify or replace the specific implementation methods of the present invention with equivalents by referring to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the claims of the present invention to be approved.

Claims

1. A suspension string structure, characterized in that: The suspension string structure suspends / anchors the overhead transmission line on the iron tower, and comprises a left limb of the suspension string, a right limb of the suspension string, a first ring structure (17), a second ring structure (9) and a suspension structure; The left limb of the suspension string is located at the upper left of the suspension structure and is connected to the suspension structure via a first ring structure (17); the right limb of the suspension string is located at the upper right of the suspension structure and is connected to the suspension structure via a second ring structure (9); The sizes of the first ring structure (17) and the second ring structure (9) are proportional to the design failure load of the suspension string structure, and the sizes of the first ring structure (17) and the second ring structure (9) are determined based on the design failure load to make them weak links; The suspension structure comprises a suspension link plate (10), a suspension wire clamp (11) and a weight piece (12); the suspension link plate (10) is provided with hanging holes, and the hanging holes are distributed along the circumference in the plane of the suspension link plate (10); the suspension wire clamp (11) is fixed to the hanging holes by bolts, and the weight piece (12) is fixed to the center position of the suspension link plate (10) by bolts; The pressure plate or bolt of the suspension clamp breaks and releases the wire when the unbalanced tension on the left and right sides is too large; the actual breaking load of the suspension string structure is more than 1.2 times the design breaking load; The left limb and the right limb of the suspension string both include a voltage-equalizing ring (7) and an EB hanging plate (1), a third ring structure (2), a DB adjustment plate (3), a TP adjustment plate (4), a U-shaped hanging ring (16), a ball head hanging ring (5), an insulator (6) and a bowl head hanging plate (8) connected in sequence by bolts; the EB hanging plate (1) is hung on the iron tower, and the voltage-equalizing ring (7) is sleeved on the outside of the insulator (6); the sizes of the U-shaped hanging ring (16) and the ball head hanging ring (5) are proportional to the design failure load of the suspension string structure, and the sizes of the U-shaped hanging ring (16) and the ball head hanging ring (5) are determined based on the design failure load, so that they become weak links; The first ring structure, the second ring structure and the third ring structure (2) each include two U-shaped hanging rings connected back to back; The first ring structure / second ring structure wherein a U-shaped structure of the hanging ring and the bowl head hanging plate (8) is connected, the other U-shaped structure of the hanging ring and the hanging link plate (10) is connected; The U-shaped hanging ring, the ball head hanging ring (5), and the back-to-back connected U-shaped structure hanging rings are all formed through two forging processes; the bowl head hanging plate (8) is formed through a forging process and a machining process.

2. The suspension string structure according to claim 1, characterized in that: The suspended connecting plate (10) is a six-split suspended connecting plate.

3. The suspension string structure according to claim 1, characterized in that: The suspension wire clamp (11) comprises a boat-shaped wire clamp body (13), a wire clamp pressure plate (14) and a UB hanging plate (15); The wire clamp pressure plate (14) is used to fix the overhead power transmission line and is connected to the ship-shaped wire clamp body (13) via bolts; The upper end of the UB hanging plate (15) is provided with a first through hole, and the lower end thereof is provided with a second through hole. The upper end of the UB hanging plate (15) is connected to the suspension connecting plate (10) via the first through hole and a bolt, and the lower end thereof is connected to the top of the boat-shaped wire clamp body (13) via the second through hole and a bolt.

4. The suspension string structure according to claim 3, characterized in that: The first through hole is a cloud-shaped through hole, and the second through hole is a circular through hole.

5. The suspension string structure according to claim 1, characterized in that: One of the U-shaped hanging rings of the third ring structure (2) is connected to the EB hanging plate (1), and the other U-shaped hanging ring is connected to the DB adjustment plate (3).

6. The suspension string structure according to claim 1, characterized in that: The rod diameters of the U-shaped hanging ring (16), the ball head hanging ring (5) and the back-to-back connected U-shaped structure hanging rings are all 18.5 mm to 38 mm.

7. The suspension string structure according to claim 1, characterized in that: The number of the suspension wire clamps (11) is 2 to 8 and is an even number; The centers of the suspension clamps (11) are located on the circumference of the same circle.

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