A high voltage power fitting for power lines

Abstract

The application relates to the technical field of electric power fittings, and discloses a high-voltage electric power fitting for a power line, which comprises a wire clamp ship body and a U-shaped rotating arm, the left and right halves of the wire clamp ship body are both penetrated and connected with U-shaped bolts, and the bottom ends of the U-shaped bolts are threadedly connected with bottom support assemblies; rotating shafts are penetrated and connected between the two ends of the top of the wire clamp ship body and the top of the U-shaped rotating arm, the outer sides of the two ends of the rotating shafts are both sleeved with inner sleeve assemblies, and the outer sides of the ends of the inner sleeve assemblies away from the rotating shafts are both sleeved with outer sleeve assemblies; and an annular piston assembly is arranged in the outer ring cavity. When the rotating shafts rotate relative to the inner sleeve assemblies, the piston bodies are driven to move close to the sealing cover, the lubricating oil in the outer ring cavity flows into the arc-shaped cavity along the damping flow channel, the lubricating oil is sprayed between the rotating shafts and the supporting rings, the lubricating effect is guaranteed, the two ends of the inner sleeve assemblies are sealed through the rotating shafts and the outer sleeve assemblies, the lubricating oil is prevented from overflowing, and the lubricating oil supplementing period is prolonged.

Description

Technical Field

[0001] This invention relates to the field of power fittings technology, specifically a high-voltage power fitting for power lines. Background Technology

[0002] Power fittings are iron or aluminum metal accessories used in power systems for connecting, fixing, and protecting overhead transmission lines and substation equipment; they are collectively referred to as power fittings. Suspension clamps are fittings that suspend conductors (ground wires) to suspension insulator strings (groups) or fitting strings (groups). They typically consist of a bracket, U-bolts, a clamp hull made of malleable cast iron, and a pressure plate.

[0003] Chinese patent CN119695757B, filed on February 26, 2025, discloses a power line fitting, specifically relating to the field of line installation technology. It includes a main body, a connecting part, a lubrication part, and an oil storage part. The main body includes a hull with a first through hole, and a fixing component on the lower side of the hull. The connecting part includes a movable plate with a second through hole and a first rotating shaft, with a second rotating shaft inserted into the second through hole. The lubrication part includes a rotating ring and a housing, with a control component and an oil injection component inside the housing, and an oil inlet on the housing. The oil storage part includes an oil storage box, with an oil delivery pipe on the lower side of the oil storage box. This invention, by setting up a lubrication part and an oil storage part, allows the lubrication part to automatically adjust the use of lubricating oil, reducing wear between components, extending the service life of the suspension clamp, and reducing lubricating oil waste. The external oil storage box facilitates technicians in adding lubricating oil, extending the service life of the suspension clamp and reducing operating costs.

[0004] In this technical solution, when the friction between the rotating ring and the through hole is greater than the elastic force of the torsion spring, the lubrication part is triggered to spray lubricating oil onto the outer wall of the rotating ring to lubricate the area between the rotating ring and the through hole. However, the sprayed lubricating oil will overflow through the gap between the rotating ring and the through hole, resulting in lubricating oil waste. Moreover, each time lubricating oil is sprayed, the lubricating oil in the oil reservoir will gradually decrease, resulting in a shorter lubricating oil replenishment cycle. Therefore, further improvements can be made. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a high-voltage power fitting for power lines, which has the advantages of shielding sprayed lubricating oil and reducing the amount of lubricating oil wasted. It solves the problem that directly spraying lubricating oil onto friction points can easily cause lubricating oil to overflow from gaps, resulting in a large amount of lubricating oil waste.

[0007] (II) Technical Solution

[0008] To achieve the aforementioned goal of shielding the sprayed lubricating oil and reducing lubricating oil waste, the present invention provides the following technical solution: a high-voltage power fitting for power lines, comprising a clamp hull and a U-shaped swing arm, wherein U-shaped bolts are inserted through the left and right halves of the clamp hull, and a base support assembly is threaded to the bottom end of each U-shaped bolt; a rotating shaft is inserted through the top two ends of the clamp hull and the top two ends of the U-shaped swing arm, wherein the U-shaped swing arm and one of the rotating shafts form a ring structure, and the other rotating shaft passes through the bottom end of the ring structure; Inner sleeve assemblies are fitted on the outer sides of both ends of the rotating shaft. The inner sleeve assemblies are fixed through the hull of the cable clamp or the U-shaped rotating arm. An outer sleeve assembly is fitted on the outer side of the inner sleeve assembly away from the rotating shaft. The end of the rotating shaft is inserted into the center of the inner wall of the outer sleeve assembly. The rotating shaft and the outer sleeve assembly seal both ends of the inner sleeve assembly. An inner annular cavity is formed between the inner wall of the inner sleeve assembly and the circumferential surface of the rotating shaft. An outer annular cavity is formed between the outer wall of the inner sleeve assembly and the inner wall of the outer sleeve assembly. The inner annular cavity and the outer annular cavity are in communication. An annular piston assembly is provided in the outer annular cavity.

[0009] Preferably, the wire clamp hull includes a receiving portion, both ends of which are bent downwards. Two support portions are welded to the middle of the receiving portion, and U-shaped covers are provided on both the left and right sides of the support portions. A rubber pad is fixedly installed at the bottom of the receiving portion, and an arc-shaped clamping plate is provided inside the receiving portion. Two limiting flanges are fixedly installed at the top of both ends of the arc-shaped clamping plate, and the two limiting flanges clamp the two sides of the U-shaped bolt.

[0010] Preferably, both ends of the U-bolt are threaded, and straight grooves are formed on opposite sides of both ends of the U-bolt. Blocks are fixed in an array along the length of the straight grooves on the inner wall of the U-bolt. The cross-section of the block is a right triangle with the hypotenuse facing downwards.

[0011] Preferably, the base assembly includes a support, a mounting cover fixedly installed at the bottom of the support, two ends of the U-bolt passing through the support and the mounting cover, two threaded collars rotatably connected through the bottom of the mounting cover, the two threaded collars being threadedly connected to the two ends of the U-bolt respectively, a sprocket fixedly installed on the circumferential surface of the threaded collar inside the mounting cover, the two sprockets being connected by a ring chain, a knob fixedly installed at the bottom end of one of the threaded collars; two mounting grooves are formed inside the support, a wedge-shaped strip is slidably connected in the mounting groove, the wedge-shaped strip is attached to the top of the blocking block, a spring is fixedly installed between the wedge-shaped strip and the inner wall of the mounting groove; a rod is fixedly installed at both ends of the support, the rod is slidably connected through the bottom end of the U-shaped cover, a spring is sleeved on the outside of the rod, the two ends of the spring are connected between the support and the U-shaped cover.

[0012] Preferably, inserts are fixedly installed at both ends of the rotating shaft, and sealing discs are fixedly installed on the left and right half circumferential surfaces of the rotating shaft. Two concentric covering rings are fixedly installed on opposite sides of the two sealing discs, and ball bearings are arranged in an array on the surface of the sealing discs and between the two covering rings.

[0013] Preferably, the inner sleeve assembly includes a spacer tube sleeved on the outer side of the shaft end. A convex ring is fixedly installed on the end of the spacer tube facing the sealing disc, and a friction ring seat is fixedly installed on the side of the convex ring facing the sealing disc. The friction ring seat is inserted between two covering rings. The side of the friction ring seat facing the sealing disc is provided with an annular concave surface, and the ball bearings are fitted onto the annular concave surface of the friction ring seat. The gap between the inner wall of the convex ring and the circumferential surface of the shaft is sealed by a sealing ring. A sealing cover is fixedly installed on the outer wall of the spacer tube. The sealing cover is fixedly installed on the hull of the clamping boat or a U-shaped rotating arm. A connecting groove is formed through the lower surface of the middle part of the spacer tube, and the inner annular cavity and the outer annular cavity are connected through the connecting groove.

[0014] Preferably, a support ring is fixedly installed on the inner wall of the spacer tube. The support ring is located between the convex ring and the communicating groove. A fan-shaped groove is opened through the lower half of the side of the support ring. The rotating shaft is rotatably connected inside the support ring. A retaining arc plate is fixedly installed on the inner wall of the spacer tube. A retaining horizontal plate is fixedly installed between both ends of the retaining arc plate and the support ring. The retaining horizontal plate is perpendicular to the retaining arc plate. The retaining arc plate and the retaining horizontal plate are attached to the circumferential surface of the rotating shaft. The support ring, the retaining arc plate, the retaining horizontal plate, and the upper half of the inner wall of the spacer tube enclose an arc-shaped cavity. A return groove is opened through the upper half of the circumferential surface of the spacer tube. The return groove is connected to the arc-shaped cavity. U-shaped holes are arrayed on the circumferential surface of the rotating shaft. One end of the U-shaped hole is connected to the arc-shaped cavity, and the other end of the U-shaped hole faces the inner wall of the support ring.

[0015] Preferably, the outer sleeve assembly includes an outer sleeve body fitted over the outside of the spacer tube, a sealing cover fitted over the open end of the outer sleeve body, a square groove and an annular groove formed on the inner end face of the outer sleeve body, an insert inserted into the square groove, an annular guide rail fixedly installed on the inner wall of the spacer tube, the outer sleeve body being rotatably connected to the annular guide rail through the annular groove, and a sealing plug penetrating through the end of the outer sleeve body.

[0016] Preferably, the annular piston assembly includes a piston body slidably connected inside the outer annular cavity; a baffle assembly is fixedly installed on the side of the sealing cover facing the outer sleeve body; the piston body and the baffle assembly are located at opposite ends of the outer annular cavity; a damping flow channel is formed between the baffle assembly and the sealing cover; a blocking arc plate is fixedly installed on the side of the piston body facing the baffle assembly; the blocking arc plate is attached to the bottom of the outer wall of the spacer tube; two sliding holes are opened through the side of the piston body; two guide rods are fixedly installed on the side of the baffle assembly facing the piston body; the piston body is slidably connected to the guide rods through the sliding holes; a sliding ball is fixedly arranged in an array on the outer wall of the piston body; a V-shaped groove is arranged in an array on the inner wall of the outer sleeve body; the sliding ball is slidably connected in the V-shaped groove; arc-shaped portions are provided at both ends of the V-shaped groove, and the center of the arc portion coincides with the axis of the outer sleeve body.

[0017] Preferably, the enclosure assembly includes a partition ring fixedly installed on the outer wall of the partition tube. The partition ring has an avoidance notch at its bottom. Two arc-shaped protrusions are fixedly installed on the left and right halves of the partition ring facing the sealing cover. Two rows of inclined plates are fixedly arranged between the two arc-shaped protrusions. An arc-shaped channel is formed between the two arc-shaped protrusions. A U-shaped channel is formed between the inclined plates and the arc-shaped protrusions. Both ends of the U-shaped channel are connected to the arc-shaped channel.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a high-voltage power fitting for power lines, which has the following beneficial effects:

[0020] 1. This high-voltage power fitting for power lines forms an inner annular cavity between the inner sleeve assembly and the rotating shaft, and an outer annular cavity between the inner sleeve assembly and the outer sleeve assembly. When the rotating shaft rotates relative to the inner sleeve assembly, it drives the piston body to move closer to the sealing cover, causing the lubricating oil inside the outer annular cavity to flow into the arc-shaped cavity along the damping flow channel. As the hydraulic pressure inside the arc-shaped cavity increases, the lubricating oil is sprayed between the rotating shaft and the support ring to ensure the lubrication effect. The rotating shaft and the outer sleeve assembly seal both ends of the inner sleeve assembly to prevent the lubricating oil from overflowing and extend the lubricating oil replenishment cycle.

[0021] 2. In the case of the high-voltage power fittings used in power lines, when the lubricating oil flows along the damping channel and when the lubricating oil is sprayed from the U-shaped hole into the gap between the rotating shaft and the support ring, the lubricating oil will be subject to a certain resistance, which will consume the kinetic energy of the lubricating oil. This will suppress the rotation of the rotating shaft relative to the support ring and reduce the relative deflection between the rotating shaft and the support ring.

[0022] 3. In this high-voltage power fitting for power lines, as the bracket moves along the U-bolt, the inclined surface of the wedge strip will press against the inclined surface of the blocking block, causing the wedge strip to slide into the mounting groove and the spring to be compressed. After the wedge strip and the blocking block are misaligned, the wedge strip pops out under the elastic action of the spring and fits against the top of the blocking block. This prevents the base bracket assembly from moving downward along the U-bolt and ensures the fixing effect of the U-bolt on the cable. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a high-voltage power fitting for power lines proposed in this invention.

[0024] Figure 2 This is a schematic diagram of the wire clamp hull and U-bolt structure of a high-voltage power fitting for power lines proposed in this invention.

[0025] Figure 3 This is a schematic diagram of the right-side cross-sectional structure of the shaft of a high-voltage power fitting for power lines proposed in this invention.

[0026] Figure 4 This is a three-dimensional structural diagram of a U-bolt and base support assembly for high-voltage power fittings used in power lines, as proposed in this invention.

[0027] Figure 5 This is a three-dimensional cross-sectional view of a U-bolt and base support assembly for high-voltage power fittings used in power lines, as proposed in this invention.

[0028] Figure 6 This invention proposes a high-voltage power fitting for power lines. Figure 5 Enlarged structural diagram of section A in the middle;

[0029] Figure 7 This is a three-dimensional structural diagram of a rotating shaft and inner sleeve assembly for a high-voltage power fitting used in power lines, as proposed in this invention.

[0030] Figure 8 This is a three-dimensional cross-sectional view of the rotating shaft and inner sleeve assembly of a high-voltage power fitting for power lines proposed in this invention.

[0031] Figure 9 This is a bottom-view three-dimensional structural diagram of the rotating shaft and inner sleeve assembly of a high-voltage power fitting for power lines proposed in this invention.

[0032] Figure 10 This is a three-dimensional structural diagram of an outer sleeve assembly and annular piston assembly for a high-voltage power fitting for power lines, as proposed in this invention.

[0033] Figure 11This is a three-dimensional cross-sectional view of the outer sleeve assembly and the annular piston assembly of a high-voltage power fitting for power lines proposed in this invention.

[0034] Figure 12 This is a three-dimensional structural diagram of a enclosure assembly for high-voltage power fittings used in power lines, as proposed in this invention.

[0035] Figure 13 This is a schematic diagram of the main structure of a high-voltage power fitting enclosure assembly for power lines proposed in this invention.

[0036] In the diagram: 100, cable clamp hull; 200, U-bolt; 300, bottom support assembly; 400, U-shaped swing arm; 500, pivot; 600, inner sleeve assembly; 700, outer sleeve assembly; 800, annular piston assembly; 900, enclosure assembly;

[0037] 101. Receiving part; 102. Support part; 103. U-shaped cover; 104. Rubber pad; 105. Arc-shaped clamp; 106. Limiting flange;

[0038] 201. Straight groove; 202. Blocking block;

[0039] 301. Support; 302. Mounting cover; 303. Threaded collar; 304. Sprocket; 305. Circular chain; 306. Knob; 307. Mounting groove; 308. Wedge bar; 309. Spring 1; 310. Insert rod; 311. Spring 2;

[0040] 501. Insert; 502. Sealing disc; 503. Enclosing ring; 504. Ball bearing;

[0041] 601. Spare tube; 602. Convex ring; 603. Friction ring seat; 604. Sealing ring; 605. Sealing cover; 606. Communicating groove; 607. Support ring; 608. Sector groove; 609. Enclosure arc plate; 610. Enclosure horizontal plate; 611. Return groove; 612. U-shaped hole;

[0042] 701. Outer sleeve body; 702. Square groove; 703. Annular groove; 704. Annular guide rail; 705. Sealing plug;

[0043] 801. Piston body; 802. Blocking arc plate; 803. Sliding hole; 804. Guide rod; 805. Sliding ball; 806. V-groove;

[0044] 901. Separator ring; 902. Clearance notch; 903. Arc-shaped protrusion; 904. Inclined piece; 905. Arc-shaped channel; 906. U-shaped channel. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Please see Figures 1-3 A high-voltage power fitting for power lines includes a clamp hull 100 and a U-shaped swing arm 400. U-bolts 200 are inserted through the left and right halves of the clamp hull 100, and a base support assembly 300 is threaded to the bottom end of each U-bolt 200. A rotating shaft 500 is inserted through the top ends of both the clamp hull 100 and the top ends of the U-shaped swing arm 400. The U-shaped swing arm 400 is U-shaped, and it and one of the rotating shafts 500 form a ring structure. The other rotating shaft 500 passes through the bottom end of the ring structure.

[0047] Inner sleeve assemblies 600 are fitted on the outer sides of both ends of the rotating shaft 500. The inner sleeve assemblies 600 are fixed through the cable clamp hull 100 or the U-shaped rotating arm 400. An outer sleeve assembly 700 is fitted on the outer side of the inner sleeve assembly 600 away from the rotating shaft 500. The end of the rotating shaft 500 is inserted into the center of the inner wall of the outer sleeve assembly 700. The rotating shaft 500 and the outer sleeve assembly 700 seal both ends of the inner sleeve assembly 600. An inner annular cavity is formed between the inner wall of the inner sleeve assembly 600 and the circumferential surface of the rotating shaft 500. An outer annular cavity is formed between the outer wall of the inner sleeve assembly 600 and the inner wall of the outer sleeve assembly 700. The inner and outer annular cavities are in communication. An annular piston assembly 800 is installed in the outer annular cavity. The inner and outer annular cavities are filled with lubricating oil. The annular piston assembly 800 slides inside the outer annular cavity, squeezing the lubricating oil from the outer annular cavity into the inner annular cavity. Then, due to gravity, the lubricating oil in the inner annular cavity flows back to the outer annular cavity, thus circulating the lubricating oil between the inner and outer annular cavities and continuously lubricating the rotating shaft 500.

[0048] Please see Figure 2The cable clamp hull 100 includes a receiving portion 101. Both ends of the cable clamp hull 100 are bent downwards, and two support portions 102 are welded to the middle of the receiving portion 101. U-shaped covers 103 are provided on both sides of the support portions 102, and the ends of U-bolts 200 pass through the bottom of the U-shaped covers 103. A rubber pad 104 is fixedly installed at the bottom of the receiving portion 101. An arc-shaped clamping plate 105 is provided inside the receiving portion 101. The rubber pad 104 and the arc-shaped clamping plate 105 are positioned above and below the cable to prevent the cable from directly contacting the receiving portion 101 and the U-bolts 200, thus avoiding cable damage under pressure. Two limiting flanges 106 are fixedly installed at the top of both ends of the arc-shaped clamping plate 105, clamping the U-bolts 200 on both sides. The limiting flanges 106 limit the arc-shaped clamping plate 105, preventing it from moving inside the receiving portion 101.

[0049] Please see Figures 4-6 Both ends of the U-bolt 200 are threaded, and straight grooves 201 are opened on opposite sides of both ends of the U-bolt 200. Blocks 202 are fixed in an array along the length of the inner wall of the straight grooves 201 of the U-bolt 200. The cross-section of the block 202 is a right triangle with the hypotenuse facing downward.

[0050] Please see Figures 4-6 The base assembly 300 includes a support 301 with an arc-shaped surface on its top for fitting against the bottom of the receiving portion 101. A mounting cover 302 is fixedly mounted on the bottom of the support 301, forming a mounting interlayer between the support 301 and the mounting cover 302. Two U-bolts 200 pass through the support 301 and the mounting cover 302 at both ends. Two threaded collars 303 are rotatably connected to the bottom of the mounting cover 302, and are threadedly connected to both ends of the U-bolt 200. A sprocket 304 is fixedly mounted on the circumferential surface of the threaded collars 303 inside the mounting cover 302. The two sprockets 304 are connected by an annular chain 305, both located within the mounting interlayer. Through the transmission action of the sprockets 304 and the annular chain 305, the two threaded collars 303 rotate synchronously, allowing the support 301 to move synchronously on both ends of the U-bolt 200. A knob 306 is fixedly installed at the bottom of one of the threaded collars 303. By holding the knob 306, one of the threaded collars 303 is driven to rotate, so that the two threaded collars 303 rotate synchronously.

[0051] The bracket 301 has two mounting grooves 307 inside, and a wedge-shaped strip 308 is slidably connected in the mounting groove 307. The wedge-shaped strip 308 is attached to the top of the blocking block 202, and a spring 309 is fixedly installed between the wedge-shaped strip 308 and the inner wall of the mounting groove 307. As the bracket 301 moves upward along the U-bolt 200, the inclined surface of the wedge-shaped strip 308 will press against the inclined surface of the blocking block 202, causing the wedge-shaped strip 308 to slide into the mounting groove 307, and the spring 309 will be compressed. After the wedge-shaped strip 308 is misaligned with the blocking block 202, under the elastic action of the spring 309, the wedge-shaped strip 308 pops out and attaches to the top of the blocking block 202.

[0052] Both ends of the support 301 are fixedly equipped with insert rods 310, which slide through and connect to the bottom end of the U-shaped cover 103. Before inserting the end of the U-bolt 200 into the support 301, the insert rods 310 can be inserted into the bottom of the U-shaped cover 103 to guide the connection process between the U-bolt 200 and the support 301. A second spring 311 is sleeved on the outside of the insert rods 310, and both ends of the second spring 311 are connected between the support 301 and the U-shaped cover 103. The elasticity of the second spring 311 ensures the mutual extrusion force between the threaded collar 303 and the threaded part of the U-bolt 200.

[0053] Please see Figures 7-8 Both ends of the rotating shaft 500 are fixedly mounted with inserts 501. The inserts 501 have a rectangular cross-section. The rotating shaft 500 is inserted into the outer sleeve assembly 700 through the inserts 501, so that the rotating shaft 500 and the outer sleeve assembly 700 rotate synchronously. Sealing discs 502 are fixedly mounted on the left and right half of the circumferential surface of the rotating shaft 500. Two concentric covering rings 503 are fixedly mounted on the opposite side of the two sealing discs 502. Ball bearings 504 are arranged in an array on the surface of the sealing discs 502 and between the two covering rings 503.

[0054] Please see Figures 7-9 The inner sleeve assembly 600 includes a spacer tube 601 sleeved on the outer side of the end of the rotating shaft 500. A connecting groove 606 is formed through the lower surface of the middle part of the spacer tube 601, and the inner annular cavity and the outer annular cavity are connected through the connecting groove 606. A protruding ring 602 is fixedly installed on the end of the spacer tube 601 facing the sealing disc 502. The protruding ring 602 blocks the lubricating oil inside the spacer tube 601. Under the action of gravity, the lubricating oil in the bottom of the spacer tube 601 can pass through the connecting groove 606 and enter the outer annular cavity.

[0055] A friction ring seat 603 is fixedly installed on the side of the convex ring 602 facing the sealing disc 502. The friction ring seat 603 is inserted between two covering rings 503. The friction ring seat 603 has an annular concave surface on the side facing the sealing disc 502. The ball 504 fits against the annular concave surface of the friction ring seat 603, thereby blocking the gap between the convex ring 602 and the rotating shaft 500 through the sealing disc 502, and reducing the friction between the sealing disc 502 and the convex ring 602 through the ball 504.

[0056] Furthermore, the gap between the inner wall of the convex ring 602 and the circumferential surface of the rotating shaft 500 is sealed by the sealing ring 604 to prevent the lubricating oil inside the inner ring cavity from flowing out from the gap between the convex ring 602 and the rotating shaft 500. A sealing cover 605 is fixedly installed on the outer wall of the spacer tube 601, and the sealing cover 605 is fixedly installed on the clamp hull 100 or the U-shaped rotating arm 400.

[0057] A support ring 607 is fixedly installed on the inner wall of the spacer tube 601. The support ring 607 is located between the convex ring 602 and the connecting groove 606. A fan-shaped groove 608 is opened through the lower half of the side of the support ring 607. The inner diameter of the support ring 607 is equal to the diameter of the rotating shaft 500. The rotating shaft 500 is rotatably connected inside the support ring 607, and the support ring 607 supports the rotating shaft 500. A retaining arc plate 609 is fixedly installed on the inner wall of the spacer tube 601. A retaining horizontal plate 610 is fixedly installed between both ends of the retaining arc plate 609 and the support ring 607. The retaining horizontal plate 610 is perpendicular to the retaining arc plate 609. The retaining arc plate 609 and the retaining horizontal plate 610 fit against the circumferential surface of the rotating shaft 500. The support ring 607, the retaining arc plate 609, the retaining horizontal plate 610 and the upper half of the inner wall of the spacer tube 601 enclose an arc-shaped cavity. The lubricating oil inside the inner ring cavity is mainly stored inside the arc-shaped cavity.

[0058] A return groove 611 is formed through the upper half of the circumferential surface of the spacer tube 601, and the return groove 611 communicates with the arc-shaped cavity. U-shaped holes 612 are arrayed on the circumferential surface of the rotating shaft 500. One end of the U-shaped hole 612 communicates with the arc-shaped cavity, and the other end of the U-shaped hole 612 faces the inner wall of the support ring 607. Thus, when the rotating shaft 500 rotates relative to the support ring 607, the lubricating oil inside the arc-shaped cavity is continuously coated on the inner wall of the support ring 607 and the circumferential surface of the rotating shaft 500 through the U-shaped holes 612, reducing the friction between the rotating shaft 500 and the support ring 607. Excess lubricating oil between the support ring 607 and the rotating shaft 500 drips into the spacer tube 601. Through the setting of the fan-shaped groove 608, the lubricating oil between the convex ring 602 and the support ring 607 can flow into the connecting groove 606, and under the action of gravity, the lubricating oil passes through the connecting groove 606 and enters the outer ring cavity.

[0059] Please see Figures 10-11The outer sleeve assembly 700 includes an outer sleeve body 701 sleeved outside the spacer tube 601, and a sealing cover 605 sleeved on the open end of the outer sleeve body 701 to seal the opening of the outer sleeve body 701. A square groove 702 and an annular groove 703 are formed on the inner end face of the outer sleeve body 701. An insert 501 is inserted into the square groove 702, so that when the rotating shaft 500 rotates, it drives the outer sleeve body 701 to rotate. An annular guide rail 704 is fixedly installed on the inner wall of the spacer tube 601. The outer sleeve body 701 is rotatably connected to the annular guide rail 704 through the annular groove 703. The annular guide rail 704 prevents the outer sleeve body 701 from detaching from the spacer tube 601. A sealing plug 705 is provided through the end of the outer sleeve body 701. An oil injection hole is provided on the outer sleeve body 701, and the sealing plug 705 is used to seal the oil injection hole, thereby allowing lubricating oil to be added to the inner annular cavity.

[0060] Please see Figure 3 and Figures 10-11 The annular piston assembly 800 includes a piston body 801 slidably connected inside the outer annular cavity. A baffle assembly 900 is fixedly installed on the side of the sealing cover 605 facing the outer sleeve body 701. The piston body 801 and the baffle assembly 900 are located at opposite ends of the outer annular cavity. A damping flow channel is formed between the baffle assembly 900 and the sealing cover 605. The bottom end of the damping flow channel communicates with the outer annular cavity, and the top end of the damping flow channel communicates with the return groove 611. A blocking arc plate 802 is fixedly installed on the side of the piston body 801 facing the baffle assembly 900. The blocking arc plate 802 is attached to the bottom of the outer wall of the spacer tube 601. When the piston body 801 approaches the baffle assembly 900, the blocking arc plate 802 first seals the connecting groove 606. Then, the piston body 801 squeezes the lubricating oil inside the outer annular cavity, causing the lubricating oil inside the outer annular cavity to pass through the damping flow channel and enter the arc-shaped cavity.

[0061] Two sliding holes 803 are opened through the side of the piston body 801. Two guide rods 804 are fixedly installed on the side of the enclosure assembly 900 facing the piston body 801. The piston body 801 is slidably connected to the guide rods 804 through the sliding holes 803. The guide rods 804 guide the piston body 801 and prevent the piston body 801 from rotating with the outer sleeve body 701.

[0062] A series of sliding balls 805 are fixed to the outer wall of the piston body 801, and a series of V-shaped grooves 806 are formed on the inner wall of the outer sleeve body 701. The sliding balls 805 are slidably connected within the V-shaped grooves 806. Arc-shaped portions are provided at both ends of the V-shaped grooves 806, with the center of the arc coinciding with the axis of the outer sleeve body 701. Specifically, initially, the sliding balls 805 are located in the middle of the V-shaped grooves 806. Therefore, when the outer sleeve body 701 and the rotating shaft 500 rotate clockwise or counterclockwise relative to the inner sleeve assembly 600, the sliding balls 805 slide into the left or right half of the V-shaped grooves 806. This causes the outer sleeve body 701, positioned on the inner wall of the V-shaped grooves 806, to compress the sliding balls 805, driving the piston body 801 to move closer to the containment assembly 900 along the guide rod 804.

[0063] Please see Figures 12-13 The enclosure assembly 900 includes a partition ring 901 fixedly mounted on the outer wall of the spacer tube 601, which fits against the inner wall of the outer sleeve body 701. A clearance notch 902 is provided at the bottom of the partition ring 901, allowing lubricating oil from inside the outer ring cavity to enter between the partition ring 901 and the sealing cover 605. Two arc-shaped protrusions 903 are fixedly mounted on the left and right halves of the partition ring 901 facing the sealing cover 605. Two rows of inclined plates 904 are fixedly arranged between the two arc-shaped protrusions 903. Both the arc-shaped protrusions 903 and the inclined plates 904 are fixedly mounted on the side of the sealing cover 605. An arc-shaped channel 905 is formed between the two arc-shaped protrusions 903, and a U-shaped channel 906 is formed between the inclined plates 904 and the arc-shaped protrusions 903. Both ends of the U-shaped channel 906 communicate with the arc-shaped channel 905. The arc-shaped channel 905 and the U-shaped channel 906 constitute a damping flow channel.

[0064] As the lubricating oil flows from bottom to top along the arc-shaped channel 905, due to the upward inclination of the U-shaped channel 906, the lubricating oil entering the U-shaped channel 906 from the arc-shaped channel 905 continues to flow upwards upon re-entering the arc-shaped channel 905, resulting in a faster flow velocity. Furthermore, as the amount of lubricating oil inside the arc-shaped cavity increases, the hydraulic pressure increases. Under the action of the hydraulic pressure, the lubricating oil is sprayed from the U-shaped hole 612 onto the inner wall of the support ring 607, further reducing the friction between the rotating shaft 500 and the support ring 607. The support ring 607 also blocks the lubricating oil, increasing the resistance during spraying, consuming some of the lubricating oil's kinetic energy, and suppressing the relative rotation between the rotating shaft 500 and the inner sleeve assembly 600.

[0065] When the lubricating oil flows downwards along the arc-shaped channel 905, the lubricating oil that enters the U-shaped channel 906 from the arc-shaped channel 905 changes its flow direction to upwards when it re-enters the arc-shaped channel 905, opposite to the flow direction of the lubricating oil inside the arc-shaped channel 905. This obstructs the lubricating oil inside the arc-shaped channel 905, reduces the flow velocity of the lubricating oil, and may even make it difficult for the lubricating oil to flow downwards. Therefore, when the piston body 801 moves away from the separator ring 901, it inhibits a large amount of lubricating oil from the arc-shaped cavity from entering the outer ring cavity.

[0066] In use, the cable passes through the inside of the receiving part 101, so that the arc-shaped clamp 105 fits against the top of the cable. Then, the two ends of the U-bolt 200 are passed through the U-shaped cover 103. Hold the support 301 and pass it through the U-shaped cover 103. Turn the knob 306, which, in conjunction with the transmission action of the sprocket 304 and the ring chain 305, drives the two threaded collars 303 to rotate synchronously, so that the support 301 moves upward along the U-bolt 200.

[0067] As the bracket 301 moves along the U-bolt 200, the inclined surface of the wedge strip 308 presses against the inclined surface of the blocking block 202, causing the wedge strip 308 to slide into the mounting groove 307 and the spring 309 to be compressed. After the wedge strip 308 and the blocking block 202 are misaligned, the wedge strip 308 pops out under the elastic action of the spring 309 and fits against the top of the blocking block 202. This prevents the base bracket assembly 300 from moving downward along the U-bolt 200 and ensures the fixing effect of the U-bolt 200 on the cable.

[0068] When the rotating shaft 500 rotates relative to the support ring 607, the insert 501 drives the outer sleeve body 701 to rotate synchronously. The outer sleeve body 701 is located on the inner wall of the V-groove 806 and squeezes the ball 805, causing the piston body 801 to slide along the guide rod 804 and gradually approach the separator ring 901. The blocking arc plate 802 first seals the connecting groove 606. Then, the piston body 801 squeezes the lubricating oil inside the outer ring cavity into the damping flow channel.

[0069] Lubricating oil flows along the arc-shaped channel 905 to the return groove 611, and then enters the annular cavity; this increases the hydraulic pressure inside the annular cavity, and the lubricating oil is sprayed through the U-shaped hole 612 into the gap between the support ring 607 and the rotating shaft 500 to lubricate the rotating shaft 500 and the support ring 607.

[0070] Some lubricating oil flows out between the rotating shaft 500 and the support ring 607, and is blocked by the convex ring 602 and the sealing ring 604, so that the lubricating oil is inside the inner ring cavity.

[0071] Subsequently, under the pull of the cable weight, the rotating shaft 500 and the spacer tube 601 rotate relative to each other to reset; the piston body 801 no longer seals the connecting groove 606, and the lubricating oil inside the inner ring cavity passes through the connecting groove 606 and enters the outer ring cavity under the action of gravity.

[0072] As the piston body 801 moves away from the separator ring 901, the outer ring cavity is under negative pressure. This promotes the flow of lubricating oil from the damping channel into the outer ring cavity. The lubricating oil flows downward along the arc-shaped channel 905. When the lubricating oil enters the U-shaped channel 906 from the arc-shaped channel 905 again, its flow direction changes to upward, opposite to the flow direction of the lubricating oil inside the arc-shaped channel 905. This obstructs the flow of lubricating oil inside the arc-shaped channel 905, reducing its flow velocity and even making it difficult for the lubricating oil to flow downward. Therefore, as the piston body 801 moves away from the separator ring 901, it inhibits a large amount of lubricating oil from the arc-shaped cavity from entering the outer ring cavity.

[0073] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-voltage power fitting for power lines, comprising a clamp hull (100) and a U-shaped swing arm (400), characterized in that: The left and right halves of the clamp hull (100) are both connected by U-bolts (200), and the bottom end of the U-bolts (200) is threaded to the bottom support assembly (300). A rotating shaft (500) is inserted between the top two ends of the clamp hull (100) and between the top two ends of the U-shaped rotating arm (400). The U-shaped rotating arm (400) and one of the rotating shafts (500) form a ring structure, and the other rotating shaft (500) passes through the bottom end of the ring structure. The inner sleeve assembly (600) is fitted on both outer sides of the rotating shaft (500). The inner sleeve assembly (600) is fixed through the cable clamp hull (100) or the U-shaped rotating arm (400). An outer sleeve assembly (700) is fitted on the outer side of the inner sleeve assembly (600) away from the rotating shaft (500). The end of the rotating shaft (500) is inserted into the center of the inner wall of the outer sleeve assembly (700). The rotating shaft (500) and the outer sleeve assembly (700) seal both ends of the inner sleeve assembly (600). The inner wall of the inner sleeve assembly (600) and the circumferential surface of the rotating shaft (500) enclose an inner annular cavity, and the outer wall of the inner sleeve assembly (600) and the inner wall of the outer sleeve assembly (700) enclose an outer annular cavity. The inner annular cavity and the outer annular cavity are connected, and an annular piston assembly (800) is provided in the outer annular cavity. The inner sleeve assembly (600) includes a spacer tube (601) sleeved on the outer side of the end of the rotating shaft (500), and a sealing cover (605) is fixedly installed on the outer wall of the spacer tube (601). The sealing cover (605) is fixedly installed on the wire clamp hull (100) or the U-shaped rotating arm (400). The annular piston assembly (800) includes a piston body (801) slidably connected inside the outer annular cavity. A retaining assembly (900) is fixedly installed on the side of the sealing cover (605) facing the outer sleeve body (701). The piston body (801) and the retaining assembly (900) are located at opposite ends of the outer annular cavity, forming a damping flow channel between the retaining assembly (900) and the sealing cover (605). A blocking arc plate (802) is fixedly installed on the side of the piston body (801) facing the retaining assembly (900). The blocking arc plate (802) is attached to the bottom of the outer wall of the spacer tube (601). Two sliding holes (803) are opened through the surface of the enclosure assembly (900). Two guide rods (804) are fixedly installed on the side of the enclosure assembly (900) facing the piston body (801). The piston body (801) is slidably connected to the guide rods (804) through the sliding holes (803). Sliding balls (805) are fixedly arranged in an array on the outer wall of the piston body (801). V-shaped grooves (806) are arranged in an array on the inner wall of the outer sleeve body (701). The sliding balls (805) are slidably connected in the V-shaped grooves (806). Arc-shaped parts are provided at both ends of the V-shaped grooves (806). The center of the arc of the arc-shaped part coincides with the axis of the outer sleeve body (701). The enclosure assembly (900) includes a partition ring (901) fixedly installed on the outer wall of the partition tube (601). The partition ring (901) has an avoidance notch (902) at its bottom. Two arc-shaped protrusions (903) are fixedly installed on the left and right halves of the partition ring (901) facing the sealing cover (605). Two rows of inclined plates (904) are fixedly arranged between the two arc-shaped protrusions (903). An arc-shaped channel (905) is formed between the two arc-shaped protrusions (903). A U-shaped channel (906) is formed between the inclined plates (904) and the arc-shaped protrusions (903). Both ends of the U-shaped channel (906) are connected to the arc-shaped channel (905).

2. The high-voltage power fitting for power lines according to claim 1, characterized in that: The wire clamp hull (100) includes a receiving part (101), both ends of the wire clamp hull (100) are bent downwards, and two support parts (102) are welded in the middle of the receiving part (101), and U-shaped covers (103) are provided on the left and right sides of the support parts (102). A rubber pad (104) is fixedly installed at the bottom of the receiving part (101). An arc-shaped clamp (105) is provided inside the receiving part (101). Two limiting flanges (106) are fixedly installed at the top of both ends of the arc-shaped clamp (105). The two limiting flanges (106) are clamped on both sides of the U-bolt (200).

3. The high-voltage power fitting for power lines according to claim 2, characterized in that: Both ends of the U-bolt (200) are threaded, and both ends of the U-bolt (200) are provided with straight grooves (201) on opposite sides. Blocks (202) are fixed in an array along the length direction on the inner wall of the straight groove (201) of the U-bolt (200). The cross-section of the block (202) is a right triangle, and the hypotenuse faces downward.

4. The high-voltage power fitting for power lines according to claim 3, characterized in that: The base assembly (300) includes a support (301), and a mounting cover (302) is fixedly installed on the bottom of the support (301). The two ends of the U-bolt (200) pass through the support (301) and the mounting cover (302). Two threaded collars (303) are rotatably connected through the bottom of the mounting cover (302). The two threaded collars (303) are respectively threadedly connected to the two ends of the U-bolt (200). A sprocket (304) is fixedly installed on the circumferential surface inside the mounting cover (302) of the threaded collar (303). The two sprockets (304) are connected by a ring chain (305). A knob (306) is fixedly installed at the bottom end of one of the threaded collars (303). The bracket (301) has two mounting slots (307) inside. A wedge-shaped strip (308) is slidably connected in the mounting slot (307). The wedge-shaped strip (308) is attached to the top of the blocking block (202). A spring (309) is fixedly installed between the wedge-shaped strip (308) and the inner wall of the mounting slot (307). Both ends of the support (301) are fixedly installed with insert rods (310). The insert rods (310) are slidably connected to the bottom end of the U-shaped cover (103). A second spring (311) is sleeved on the outside of the insert rods (310). The two ends of the second spring (311) are connected between the support (301) and the U-shaped cover (103).

5. The high-voltage power fitting for power lines according to claim 1, characterized in that: Both ends of the rotating shaft (500) are fixedly installed with inserts (501), and sealing discs (502) are fixedly installed on the left and right half circumferential surfaces of the rotating shaft (500). Two concentric covering rings (503) are fixedly installed on opposite sides of the two sealing discs (502). Ball bearings (504) are arranged in an array on the surface of the sealing discs (502) and between the two covering rings (503).

6. The high-voltage power fitting for power lines according to claim 5, characterized in that: A protruding ring (602) is fixedly installed on one end of the spacer tube (601) facing the sealing disc (502). A friction ring seat (603) is fixedly installed on the side of the protruding ring (602) facing the sealing disc (502). The friction ring seat (603) is inserted between two covering rings (503). The friction ring seat (603) has an annular concave surface on the side facing the sealing disc (502). The ball (504) fits against the annular concave surface of the friction ring seat (603). The gap between the inner wall of the convex ring (602) and the circumferential surface of the rotating shaft (500) is sealed by the sealing ring (604); A connecting groove (606) is provided through the lower surface of the middle part of the spacer tube (601), and the inner ring cavity and the outer ring cavity are connected through the connecting groove (606).

7. The high-voltage power fitting for power lines according to claim 6, characterized in that: A support ring (607) is fixedly installed on the inner wall of the spacer tube (601). The support ring (607) is located between the convex ring (602) and the connecting groove (606). A fan-shaped groove (608) is opened through the lower half of the side of the support ring (607). The rotating shaft (500) is rotatably connected inside the support ring (607). A retaining arc plate (609) is fixedly installed on the inner wall of the spacer tube (601). A retaining horizontal plate (610) is fixedly installed between both ends of the retaining arc plate (609) and the support ring (607). The retaining horizontal plate (610) is perpendicular to the retaining arc plate (609). The retaining arc plate (609) and the retaining horizontal plate (610) are attached to the circumferential surface of the rotating shaft (500). The support ring (607), the retaining arc plate (609), the retaining horizontal plate (610) and the upper half of the inner wall of the spacer tube (601) enclose an arc-shaped cavity. A return groove (611) is provided through the upper half of the circumferential surface of the spacer tube (601). The return groove (611) is connected to the arc cavity. U-shaped holes (612) are arranged in an array on the circumferential surface of the rotating shaft (500). One end of the U-shaped hole (612) is connected to the arc cavity, and the other end of the U-shaped hole (612) faces the inner wall of the support ring (607).

8. The high-voltage power fitting for power lines according to claim 7, characterized in that: The outer sleeve assembly (700) includes an outer sleeve body (701) sleeved on the outside of the spacer tube (601), a sealing cover (605) sleeved on the open end of the outer sleeve body (701), a square groove (702) and an annular groove (703) are provided on the inner end face of the outer sleeve body (701), an insert (501) is inserted into the square groove (702), an annular guide rail (704) is fixedly installed on the inner wall of the spacer tube (601), the outer sleeve body (701) is rotatably connected to the annular guide rail (704) through the annular groove (703), and a sealing plug (705) is provided through the end of the outer sleeve body (701).

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