A power construction wire tightener

Abstract

The utility model relates to a line tightener for electric power construction belongs to high voltage electric power construction technical field. The line tightener for electric power construction, include: two collars, worm, drive assembly and self -lock subassembly, the periphery equidistance fixed connection of two collars has a plurality of supports, a plurality of supports will two collars coaxial fixed, the inside fixed sleeve of one collar is equipped with the sleeve, the inside sliding sleeve of another collar is equipped with the rack bar, one end of rack bar inserts the inside of sleeve, and the one end fixed connection of sleeve and rack bar is equipped with the hook through two collars respectively. The line tightener adopts double high strength aluminum alloy collar, is connected through three solid truss type supports, is about 120 degrees and is uniformly distributed and is laser welded to ensure coaxiality, one side collar inlaying chromium plated rack bar, the other side fixed sleeve, both ends are equipped with galvanized nickel hook. Worm drives the rack bar translation through bearing, cooperates bidirectional drive - self - locking subassembly, and the stability and precision are obviously superior to hydraulic line tightener.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage power construction technology, and in particular to a tensioner for power construction. Background Technology

[0002] In the field of high-voltage power line construction, the tensioner is a core tool, and its technological evolution directly determines the efficiency of power grid construction and long-term operational safety. Currently, my country's ultra-high-voltage power grid construction is in a stage of rapid development, having formed a backbone network of "fourteen AC and fourteen DC" lines, with over 30,000 kilometers of new transmission lines added annually. In landmark projects such as the ±1100kV Jiquan line and the 1000kV Sutong GIL integrated utility tunnel, the accuracy requirement for conductor sag control has exceeded 0.1 millimeters, posing unprecedented technical challenges to tensioning operations.

[0003] First, there are inherent defects in the hydraulic system. Although the existing hydraulic tensioner can provide a pulling force of 50-80 tons, the compressibility of the oil causes a lag in the tension response. When the line is laid, oil pressure fluctuations can cause sudden tension changes, far exceeding the fatigue limit of the conductor, which poses a risk of conductor slippage. The response delay can easily lead to excessive sag deviation, directly restricting construction efficiency. Utility Model Content

[0004] Based on this, it is necessary to address the problem that although hydraulic tensioners can provide tensile force in the range of one ton, the compressibility of the hydraulic fluid causes a lag in tension response. During line laying, fluctuations in hydraulic pressure can cause sudden tension changes that far exceed the fatigue limit of the conductor, posing a risk of conductor slippage. The response delay can also easily lead to excessive sag deviation, directly restricting construction efficiency. Therefore, it is necessary to provide a tensioner for power construction.

[0005] A tensioner for power construction includes: two collars, with multiple supports fixedly connected at equal intervals around the two collars, the multiple supports fixing the two collars coaxially, a sleeve fixedly fitted inside one collar, and a toothed rod slidably fitted inside the other collar, one end of the toothed rod being inserted into the inside of the sleeve, and hooks fixedly connected through the two collars respectively.

[0006] A worm gear, which is mounted on the bracket and located below the rack, is used to drive the rack to move through the meshing of the rack and the worm gear;

[0007] A drive assembly is mounted on the bracket and located at one end of the worm gear;

[0008] The self-locking assembly is mounted on the bracket and located at the other end of the worm gear.

[0009] In one embodiment, a guide block is fixedly connected above the toothed bar, and one end of the guide block is inserted into the interior of one of the collars and slides.

[0010] In one embodiment, the lower part of the rack is threaded, and the worm rotates along the same parallel line as the rack.

[0011] In one embodiment, the drive assembly includes a motor fixed to the bracket, the output end of the motor being driven by a transmission rod, one end of the transmission rod being engaged with a first connecting rod, one end of the first connecting rod being fixedly connected to one end of the worm gear, and the first connecting rod and the worm gear being coaxially connected.

[0012] In one embodiment, the self-locking assembly includes a fixing block fixed to the bracket, a telescopic block movably connected inside the fixing block via a spring, a toothed ring engaging above the telescopic block, a second connecting rod fixedly inserted inside the toothed ring, one end of the second connecting rod being fixedly connected to the other end of the worm gear, and the second connecting rod and the worm gear rotating coaxially.

[0013] In one embodiment, positioning plates are fixedly connected to both sides of the telescopic block, and two sets of limiting grooves are symmetrically opened on the top of the fixed block. The two positioning plates are respectively inserted into the two limiting grooves and fixedly engaged with the fixed block.

[0014] In one embodiment, multiple fixing rings are fixedly sleeved on the surfaces of the two ends of the worm, the first connecting rod, the second connecting rod, and the bracket. Each fixing ring, which is coaxially fixed with the worm, has a connecting frame between its two sides and the corresponding fixing ring on the bracket.

[0015] In one embodiment, support frames are fixedly connected to both sides of the motor and the fixing block, and the ends of the multiple support frames away from the motor and the fixing block are respectively fixedly connected to the outer walls of the multiple fixing rings.

[0016] Beneficial effects

[0017] 1. The two collars are made of high-strength aluminum alloy through precision forging. Three truss-type supports are welded equidistantly along the circumference of the outer wall of the collar. The supports are solid profiles filled with damping material. The included angle between adjacent supports is approximately °. The coaxiality of the two collars is ensured by laser positioning welding. A sleeve is fixed to the inner wall of one collar by interference fit. A chrome-plated toothed rod is slidably embedded in the inner cavity of the other collar. The toothed rod and the sleeve form a sliding pair. One end of the sleeve and the other end of the toothed rod pass through the two collars respectively and are fixedly connected to high-carbon steel hooks by pins. The hooks are zinc-nickel alloy plated and have anti-slip teeth on the bearing surface. The worm is supported in the middle section of the support by double-row tapered roller bearings. The worm and the toothed rod form a single-head worm gear transmission pair. The rotational motion of the worm is converted into the axial displacement of the toothed rod to achieve fine-tuning feed. The drive component and the self-locking component are respectively arranged at both ends of the worm shaft to form a two-way mechanical constraint, which greatly increases the safety of the toothed rod during movement. Compared with traditional hydraulic wire tensioners, the stability and accuracy are greatly improved.

[0018] 2. A dovetail-shaped guide block is fixedly connected to the upper part of the rack via a cold-fitting process. The guide block and the trapezoidal guide groove in the inner cavity of the collar form a sliding pair. The lower part of the rack is machined with a right-hand thread to form a single-start transmission pair with the worm. The optimized helix angle design improves the transmission efficiency. The tooth surface is ion-nitrided. The worm is supported by a P-grade double-row tapered roller bearing. The laser alignment process ensures that the parallelism between the worm and rack axes is small, minimizing the "tooth biting" phenomenon and reducing transmission noise. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the support structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the drive component structure of this utility model;

[0023] Figure 4 For the present utility model Figure 3 Schematic diagram of the structure at point A in the middle;

[0024] Figure 5 This is a schematic diagram of the self-locking component structure of this utility model.

[0025] Figure label:

[0026] 100. Bracket; 101. Connecting frame; 102. Fixing ring; 103. Support frame; 200. Collar; 300. Gear; 301. Guide block; 302. Sleeve; 303. Hook; 400. Worm gear; 500. Drive assembly; 501. Motor; 502. Transmission rod; 503. First connecting rod; 600. Self-locking assembly; 601. Fixing block; 602. Telescopic block; 603. Gear ring; 604. Second connecting rod; 605. Positioning plate; 606. Limiting groove. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The following is combined Figures 1-5 This utility model describes a tensioner for power construction.

[0029] In one embodiment, a wire tensioner for power construction includes: two collars 200, a worm gear 400, a drive assembly 500, and a self-locking assembly 600. Multiple supports 100 are equidistantly fixed around the two collars 200, and the supports 100 coaxially fix the two collars 200. A sleeve 302 is fixedly fitted inside one collar 200, and a toothed rod 300 is slidably fitted inside the other collar 200. One end of the toothed rod 300 is inserted into the sleeve 302. Hooks 303 are fixedly connected to one end of the sleeve 302 and the other end of the toothed rod 300 respectively, passing through the two collars 200. The worm gear 400 is mounted on the support 100 and located below the toothed rod 300. The meshing of the toothed rod 300 and the worm gear 400 drives the movement of the toothed rod 300. The drive assembly 500 is mounted on the support 100 and located at one end of the worm gear 400. The self-locking assembly 600 is mounted on the support 100 and located at the other end of the worm gear 400.

[0030] In this embodiment, the two collars 200 are made of high-strength aluminum alloy material through precision forging. Three truss-type supports 100 are welded equidistantly along the circumference of the outer wall of the collars 200. The supports 100 are made of solid profile structure and filled with damping material. The included angle between adjacent supports 100 is about 120°. The coaxiality of the two collars 200 is ensured by laser positioning welding process.

[0031] A sleeve 302 is fixed to the inner wall of one side collar 200 by an interference fit, and a toothed rod 300 with a chrome-plated surface is slidably embedded in the inner cavity of the other side collar 200. The toothed rod 300 and the sleeve 302 form a sliding pair. One end of the sleeve 302 and the other end of the toothed rod 300 pass through the two collars 200 respectively and are fixedly connected to a high carbon steel hook 303 by a pin. The hook 303 is zinc-nickel alloy plated on the surface and has anti-slip teeth on the bearing surface.

[0032] The worm 400 is supported in the middle section of the bracket 100 by a double-row tapered roller bearing. The worm 400 and the rack 300 form a single-head worm 400 transmission pair. The rotational motion of the worm 400 is converted into the axial displacement of the rack 300 to achieve fine-tuning of the feed. The drive assembly 500 and the self-locking assembly 600 are respectively arranged at both ends of the axial direction of the worm 400 to form a two-way mechanical constraint, which greatly increases the safety of the rack 300 during movement. Compared with the traditional hydraulic tensioner, the stability and accuracy are greatly improved.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, a guide block 301 is fixedly connected to the upper part of the rack 300. One end of the guide block 301 is inserted into the inside of one of the collars 200 and slides. The lower part of the rack 300 is threaded. The worm gear 400 rotates on the same parallel line as the rack 300.

[0034] In this embodiment, a dovetail-shaped guide block 301 is fixedly connected to the upper part of the rack 300 by a cold-fitting process. The guide block 301 and the trapezoidal guide groove opened in the inner cavity of the collar 200 form a sliding pair. The lower section of the rack 300 is machined with a right-hand thread to form a single-start transmission pair with the worm gear 400. The optimized helix angle design improves the transmission efficiency. The tooth surface is ion nitrided. The worm gear 400 is supported by a P5 grade double-row tapered roller bearing. The laser alignment process ensures that the parallelism between the axis of the worm gear 400 and the rack 300 is small, avoiding the "tooth biting" phenomenon as much as possible and reducing transmission noise.

[0035] like Figure 2 , Figure 3 and Figure 4 As shown, the drive assembly 500 includes a motor 501 fixed on the bracket 100. The output end of the motor 501 is driven to connect to a transmission rod 502. One end of the transmission rod 502 is engaged with a first connecting rod 503. One end of the first connecting rod 503 is fixedly connected to one end of the worm gear 400. The first connecting rod 503 and the worm gear 400 are coaxially connected.

[0036] In this embodiment, the drive component 500 adopts a modular integrated design. Its core is a high-efficiency motor 501 fixed to the lateral base of the bracket 100. The motor 501 is a brushless DC servo motor. The output end of the motor 501 is equipped with a double-row angular contact ball bearing to achieve radial and axial composite load bearing.

[0037] The motor 501 shaft and the transmission rod 502 are connected with zero backlash through a diaphragm-type flexible coupling. The transmission rod 502 and the first connecting rod 503 are driven by helical gear meshing. The gear pair module has been optimized, and the contact fatigue strength is improved compared with the straight gear structure. The tooth surface modification process effectively reduces meshing impact noise. The first connecting rod 503 is axially fixed to the worm gear 400 through an involute spline. The spline pair mating clearance is controlled at the micron level to ensure the synchronization of torque transmission. The drive assembly 500 adopts a three-stage reduction design to convert the high-speed rotation of the motor 501 into the low-speed, high-torque output of the worm gear 400. The transmission efficiency curve remains stable in the rated load range, which reduces energy consumption compared with traditional hydraulic drive.

[0038] like Figure 2 , Figure 3 and Figure 4 As shown, the self-locking assembly 600 includes a fixing block 601 fixed on the bracket 100. A telescopic block 602 is movably connected inside the fixing block 601 via a spring. A toothed ring 603 is engaged and locked above the telescopic block 602. A second connecting rod 604 is fixedly inserted inside the toothed ring 603. One end of the second connecting rod 604 is fixedly connected to the other end of the worm gear 400. The second connecting rod 604 and the worm gear 400 rotate coaxially. Positioning plates 605 are fixedly connected to both sides of the telescopic block 602. Two sets of limiting grooves 606 are symmetrically opened above the fixing block 601. The two positioning plates 605 are respectively inserted into the two limiting grooves 606 and fixedly locked with the fixing block 601.

[0039] In this embodiment, the self-locking component 600 adopts a multi-level redundant mechanical self-locking structure. The core of the self-locking component 600 is a quenched steel fixing block 601 embedded in the side base of the bracket 100. The block has a built-in double helix compression spring group. The spring wire diameter is optimized to achieve variable stiffness characteristics while ensuring axial preload.

[0040] The telescopic block 602 adopts a split wedge design. The telescopic block 602 and the involute tooth shape of the toothed ring 603 form a surface contact engagement, which effectively disperses the contact stress. The toothed ring 603 is rigidly connected to the second connecting rod 604 by electron beam welding. The positioning plate 605 and the limiting groove 606 adopt an interference fit. The mating surface is coated with nano-level molybdenum disulfide lubricant, which ensures axial impact resistance while realizing rotational floating compensation. It can still maintain the locked state under vibration conditions and completely eliminate the risk of wire springback.

[0041] like Figure 1 , Figure 3 and Figure 5As shown, multiple fixing rings 102 are fixedly sleeved on the two ends of the worm gear 400, the first connecting rod 503, the second connecting rod 604 and the surface of the bracket 100. Each fixing ring 102 fixed coaxially with the worm gear 400 has a connecting frame 101 between its two sides and the corresponding fixing ring 102 on the bracket 100. Support frames 103 are fixedly connected to both sides of the motor 501 and the fixing block 601. The ends of the multiple support frames 103 away from the motor 501 and the fixing block 601 are fixedly connected to the outer walls of the multiple fixing rings 102.

[0042] In this embodiment, the fixing ring 102 adopts a split clamp structure design. The main body material is precipitation hardening stainless steel. After being formed by wire cutting, it is subjected to deep cryogenic treatment. The fit clearance between the fixing ring 102 and the worm gear 400, the first connecting rod 503 and the second connecting rod 604 is controlled within a certain range. Each fixing ring 102 is axially locked by three sets of M6 set screws. The screw preload torque is controlled by the torque method to ensure the stability of the clamping force.

[0043] The connecting frame 101 adopts a double-layer truss or circular structure with elliptical weight-reducing holes on its surface. The connecting frame 101 and the fixing ring 102 are connected by multiple high-strength bolts evenly distributed around the circumference. The contact surface is coated with structural adhesive to form a glue-bolt composite connection. The support frame 103 has a spatial triangular configuration with reinforcing ribs on its surface. The connection nodes between the support frame 103 and the motor 501 and the fixing block 601 adopt a ball-head hinge structure, which allows for a certain amount of installation error compensation. Combined with laser alignment technology, the coaxiality of the transmission system is ensured. The support system improves the torsional rigidity of the whole machine.

[0044] Working principle: During operation, the high-efficiency brushless motor 501 of the drive assembly 500 starts, and the torque is transmitted to the transmission rod 502 through the diaphragm coupling. After being reduced by helical gear, the worm gear 400 is driven to rotate by the first connecting rod 503.

[0045] The worm gear 400 and the rack 300 form a single-head transmission pair, which converts the rotational motion into the axial linear motion of the rack 300. The guide block 301 and the trapezoidal guide groove of the collar 200 cooperate to ensure the accuracy of the motion trajectory. During the tension adjustment process, the telescopic block 602 of the self-locking component 600 is kept separated from the rack 603 under the action of the spring group. When the motor 501 stops, the positioning plate 605 is pressed to disengage the positioning plate 605 from the limiting groove 606. The self-locking component 600 is immediately triggered to lock the worm gear 400. With the variable stiffness characteristics of the double helix compression spring group, the nonlinear safety characteristic of the self-locking force is achieved as the load increases. The truss support system composed of the fixed ring 102 and the connecting frame 101 improves the torsional stiffness of the whole machine through the composite connection of rubber and screw and the ball head hinge node.

[0046] Compared to traditional hydraulic tensioners, this solution improves transmission efficiency, replaces hydraulic transmission with electric direct drive, completely eliminates the risk of oil leakage, shortens response time, and increases tension control.

[0047] The self-locking safety factor is improved. The mechanical self-locking structure of the self-locking component 600 can still maintain the locked state under vibration conditions, minimizing the risk of wire rebound.

[0048] Maintenance costs are reduced, modular design allows for quick on-site replacement of core components, the overall weight is reduced, it is adaptable to a wide temperature range of -40℃ to 70℃, the sag pass rate of the tensioner is improved, and the operating efficiency is significantly improved compared to hydraulic equipment.

[0049] It should be noted that the motor 501 mentioned above is a device with relatively mature existing technology. The specific model can be selected according to actual needs. In addition, the motor 501 can be powered by an internal power supply, which will not be elaborated here.

[0050] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tensioner for power construction, characterized in that, include: Two collars (200) are provided, and multiple brackets (100) are fixedly connected at equal intervals around the two collars (200). The multiple brackets (100) fix the two collars (200) coaxially. A sleeve (302) is fixedly fitted inside one of the collars (200), and a toothed rod (300) is slidably fitted inside the other collar (200). One end of the toothed rod (300) is inserted into the inside of the sleeve (302). One end of the sleeve (302) and one end of the toothed rod (300) are respectively fixedly connected to hooks (303) through the two collars (200). The worm (400) is mounted on the bracket (100) and located below the rack (300). Through the meshing of the rack (300) and the worm (400), it is used to drive the movement of the rack (300). A drive assembly (500) is disposed on the bracket (100) and located at one end of the worm gear (400); A self-locking assembly (600) is provided on the bracket (100) and located at the other end of the worm (400).

2. The power line tightener according to claim 1, wherein A guide block (301) is fixedly connected above the rack (300), and one end of the guide block (301) is inserted into the interior of one of the collars (200) and slides.

3. The power line tightener according to claim 1, wherein The lower part of the rack (300) is threaded, and the worm (400) rotates along the same parallel line as the rack (300).

4. The electrical construction line tightener of claim 1, wherein The drive assembly (500) includes a motor (501) fixed on the bracket (100). The output end of the motor (501) is driven by a transmission rod (502). One end of the transmission rod (502) is engaged with a first connecting rod (503). One end of the first connecting rod (503) is fixedly connected to one end of the worm gear (400). The first connecting rod (503) and the worm gear (400) are coaxially connected.

5. The electrical construction line tightener of claim 4, wherein The self-locking assembly (600) includes a fixing block (601) fixed on the bracket (100). A telescopic block (602) is movably connected inside the fixing block (601) via a spring. A toothed ring (603) is engaged above the telescopic block (602). A second connecting rod (604) is fixedly inserted inside the toothed ring (603). One end of the second connecting rod (604) is fixedly connected to the other end of the worm gear (400). The second connecting rod (604) and the worm gear (400) rotate coaxially.

6. The tensioner for power construction according to claim 5, characterized in that, Positioning plates (605) are fixedly connected to both sides of the telescopic block (602). Two sets of limiting grooves (606) are symmetrically opened on the top of the fixed block (601). The two positioning plates (605) are respectively inserted into the two limiting grooves (606) and fixedly engaged with the fixed block (601).

7. The electrical construction line tightener of claim 6, wherein Multiple fixing rings (102) are fixedly sleeved on the surfaces of the two ends of the worm (400) 1, the first connecting rod (503), the second connecting rod (604) and the bracket (100). Each fixing ring (102) fixed coaxially with the worm (400) has a connecting frame (101) between its two sides and the corresponding fixing ring (102) on the bracket (100).

8. The electrical construction line tightener of claim 7, wherein, Both sides of the motor (501) and the fixing block (601) are fixedly connected to support frames (103), and one end of the multiple support frames (103) away from the motor (501) and the fixing block (601) is fixedly connected to the outer wall of multiple fixing rings (102).

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