A kind of measurement electric power fitting for extra-high voltage direct current transmission project

Abstract

The utility model discloses a kind of measurement electric power fittings for extra-high voltage direct current transmission engineering in the technical field of direct current transmission engineering, including fixed frame, sliding through-hole is opened in the fixed frame inside, bidirectional screw rod is penetrated in the fixed frame inside, handle is fixedly installed in bidirectional screw rod one end, two driving blocks are sleeved and screwed in the outside of bidirectional screw rod, the fixed part for clamping cable line is installed in the bottom of driving block, two groups of fixed part are used to clamp and fix two different width cable lines respectively, handle can drive bidirectional screw rod reciprocating rotation, bidirectional screw rod can drive two driving blocks in sliding through-hole each other close or far away, the fixed part in the bottom of driving block can install and fix cable of different diameter, then lock catch part is used to lock catch and fix driving block and fixed frame.

Description

Technical Field

[0001] This utility model relates to the field of DC power transmission engineering, specifically a measuring power fitting for ultra-high voltage DC power transmission engineering. Background Technology

[0002] In ultra-high voltage direct current (UHVDC) transmission projects, measuring power fittings are core components connecting cables (conductors) and monitoring modules. They must simultaneously achieve the dual functions of stable cable clamping and accurate measurement of electrical parameters (current, temperature). Their application scenarios have significant characteristics: First, the cable specifications are diverse. Due to differences in transmission capacity, the outer diameter of the cables commonly used in the project is large. Moreover, in double-circuit or multi-circuit lines on the same tower, the spacing (width) of the two cables needs to be adjusted according to the tower design. Second, the installation and maintenance environment is harsh. The fittings need to be operated under conditions such as high-altitude towers, strong winds, and icing.

[0003] However, the existing UHVDC measuring power fittings are not optimized for the above scenarios. They have serious defects in three aspects: cable width adaptability, ease of fixing and operation, and reliability of position adjustment and locking. The existing cable clamping structure of measuring power fittings is mostly a fixed spacing and a single specification clamping port design, which cannot be adjusted according to the cable outer diameter or the spacing (width) between two cables.

[0004] Furthermore, in double-circuit UHV lines erected on the same tower, the spacing between the two cables needs to be dynamically adjusted according to the length of the tower crossarm and the requirements for wind deflection. The existing hardware fixing frame is an integrated structure, and the spacing cannot be adjusted. If it is forcibly installed, it will cause uneven stress on the cable and increase the risk of conductor strand breakage. Alternatively, special hardware may need to be customized for different spacings, which will increase the types of spare parts for the project, increase procurement costs, and require frequent replacement of hardware during operation and maintenance.

[0005] The installation of UHV power measurement fittings requires maintenance personnel to complete the work on high-altitude towers. However, the existing fixed structure's opening design is not suitable for high-altitude operations, resulting in long installation times and high risks. After position adjustment, there is no locking mechanism, leading to insufficient stability and safety and measurement risks. During the operation of UHV lines, the fittings need to be finely adjusted according to changes in cable sag. However, the existing fittings' position adjustment structure lacks a reliable locking design, making them prone to displacement after adjustment. Therefore, it is necessary to design a power measurement fitting for UHV DC transmission projects to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a measuring power fitting for ultra-high voltage direct current transmission projects, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a measuring power fitting for ultra-high voltage direct current transmission projects, comprising a fixing frame, a sliding through hole on the inner side of the fixing frame, a bidirectional lead screw passing through the inner side of the fixing frame, a handle fixedly installed at one end of the bidirectional lead screw, two drive blocks fitted and screwed onto the outer side of the bidirectional lead screw, a fixing component for clamping the cable installed at the bottom of the drive block, the two sets of fixing components for clamping and fixing two cables of different widths respectively, and a locking component for fixing different positions of the drive block installed on one side of the drive block, the locking component for preventing the drive block from shifting or shaking.

[0008] Preferably, the fixing component includes a connecting block that is fixedly connected to the bottom of the driving block, a mounting plate that is rotatably connected to the outside of the connecting block, a sliding groove that is formed at the bottom of the mounting plate, and a slider that is slidably connected to the inside of the sliding groove.

[0009] Preferably, the fixing component further includes clamping blocks that are fixedly installed to the bottom of the mounting plate and the bottom of the slider respectively, a star bolt is threaded through one side of the slider, and a plurality of evenly arranged locking slots are provided on the top of the slide groove.

[0010] Preferably, the locking component includes a fixed cavity formed on one side of the driving block, a sliding plate slidably connected to the inside of the fixed cavity, a connecting plate with a locking post fixedly connected to both ends of the sliding plate, a screw threadedly installed through the inside of the fixed cavity, the screw thread being rotatably connected to the connecting plate through the fixing part and not disengaging, and a plurality of evenly arranged locking grooves being formed on both sides of the sliding through hole.

[0011] Preferably, a pad is installed on one side of the clamping block by bolts.

[0012] Preferably, a spring is fitted on the outside of the screw, and the two ends of the spring are fixedly connected to the fixed cavity and the sliding plate, respectively.

[0013] Preferably, a limiting block is fixedly connected to the other side of the driving block, and the limiting block is embedded in the inner side of the sliding through hole to slide.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The sliding through hole is connected to the two side walls of the fixing frame. The handle can drive the bidirectional screw to rotate back and forth. The bidirectional screw can drive the two drive blocks to move closer or further apart in the sliding through hole. The fixing part at the bottom of the drive block can install and fix cables of different diameters. Then, the locking part is used to lock and fix the drive block and the fixing frame to prevent the drive block and the fixing part from shifting or shaking, thus improving the convenience and practicality of fixing cables.

[0015] 2. The connecting block has a "convex" shaped cross section. The mounting plate can rotate on the outside of the connecting block to rotate at a corresponding angle according to the direction of the cable. The slider on the top of the clamping block slides in the groove. Then, the star screw is screwed into the slider and rotated. Finally, the star screw is inserted into the locking groove for screwing installation. This allows the two clamping blocks to clamp the cable for installation and fixation, improving the convenience and stability of cable installation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front sectional perspective view of the overall structure of this utility model; Figure 3 The overall structure of this utility model Figure 2 Enlarged view of point A in the middle; Figure 4 The overall structure of this utility model Figure 2 Enlarged view at point B in the middle; Figure 5 This is a structural diagram of the connecting block, mounting plate, slide groove, slider, clamping block, star bolt, locking groove, and pad block in the overall structure of this utility model.

[0017] In the diagram: 1. Fixing frame; 2. Sliding through hole; 3. Two-way lead screw; 4. Handle; 5. Drive block; 6. Connecting block; 7. Mounting plate; 8. Slide groove; 9. Slider; 10. Clamping block; 11. Star bolt; 12. Locking groove; 13. Fixing cavity; 14. Sliding plate; 15. Locking post; 16. Connecting plate; 17. Screw; 18. Fixing part; 19. Locking groove; 20. Pad; 21. Spring; 22. Limiting block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1 Please refer to Figure 1-5As shown, this utility model provides a measuring power fitting for ultra-high voltage direct current transmission projects, including a fixed frame 1. A sliding through hole 2 is provided on the inner side of the fixed frame 1. A bidirectional lead screw 3 passes through the inner side of the fixed frame 1. A handle 4 is fixedly installed at one end of the bidirectional lead screw 3. Two drive blocks 5 are fitted and screwed onto the outer side of the bidirectional lead screw 3. A fixing component for clamping the cable is installed at the bottom of the drive block 5. The two sets of fixing components are used to clamp and fix two cables of different widths respectively. A locking component for fixing different positions of the drive block 5 is installed on one side of the drive block 5. The locking component is used to prevent the drive block 5 from shifting or shaking. A limit block 22 is fixedly connected to the other side of the drive block 5. The limit block 22 is embedded in the sliding through hole 2 and slides.

[0020] In addition, the sliding through hole 2 is connected to the two side walls of the fixing frame 1. The handle 4 can drive the bidirectional lead screw 3 to reciprocate. The bidirectional lead screw 3 can drive the two drive blocks 5 to move closer or further apart within the sliding through hole 2. The limiting block 22 can guide and limit the drive blocks 5 to prevent them from shifting or shaking. The fixing part at the bottom of the drive block 5 can install and fix cables of different diameters. Then, the locking part is used to lock and fix the drive block 5 to the fixing frame 1 to prevent the drive block 5 and the fixing part from shifting or shaking, thus improving the convenience and practicality of fixing cables.

[0021] Specifically, the fixing component includes a connecting block 6 fixedly connected to the bottom of the drive block 5, a mounting plate 7 rotatably connected to the outside of the connecting block 6, a sliding groove 8 opened at the bottom of the mounting plate 7, a slider 9 slidably connected to the inside of the sliding groove 8, and a clamping block 10 fixedly installed to the bottom of the mounting plate 7 and the bottom of the slider 9 respectively. A star bolt 11 is threaded through and screwed onto one side of the slider 9. A plurality of evenly arranged locking grooves 12 are opened at the top of the sliding groove 8. A pad 20 is installed on one side of the clamping block 10 by bolts.

[0022] The connecting block 6 has a "convex" shaped cross section. The mounting plate 7 can rotate outside the connecting block 6 to rotate at a corresponding angle according to the direction of the cable. The slider 9 on the top of the clamping block 10 slides in the slide groove 8. Then, the star screw 17 is screwed to the slider 9 and rotated. The star screw 17 is then inserted into the locking groove 12 for screwing installation. This allows the two clamping blocks 10 to clamp the cable for installation and fixation, improving the convenience and stability of cable installation.

[0023] The pad 20 is prone to damage due to friction between it and the cable. The pad 20 is disassembled and replaced by bolts to facilitate disassembly or replacement.

[0024] More specifically, the locking component includes a fixed cavity 13 opened on one side of the drive block 5, a sliding plate 14 slidably connected inside the fixed cavity 13, a connecting plate 16 of a locking post 15 fixedly connected to both ends of the sliding plate 14, a screw 17 threadedly installed inside the fixed cavity 13, the screw 17 being rotatably connected to the connecting plate 16 through the fixing part 18 and not disengaging, a spring 21 being fitted on the outside of the screw 17, and both ends of the spring 21 being fixedly connected to the fixed cavity 13 and the sliding plate 14 respectively.

[0025] Furthermore, the screw 17 can be screwed and rotated with the fixed cavity 13. Then, the screw 17 drives the sliding plate 14 to slide in the fixed cavity 13 through the fixed part 18. The spring 21 on the outside of the screw 17 can squeeze and push the sliding plate 14, increasing the strength of the sliding plate 14 driving the locking pin 15 to insert into the locking groove 19 through the connecting plate 16, thereby improving the stability and practicality of the locking pin 15 locking and fixing the drive block 5.

[0026] Working principle: First, the handle 4 drives the bidirectional lead screw 3 to rotate. At this time, the bidirectional lead screw 3 drives the two drive blocks 5 to move closer to each other in the sliding through hole 2. At the same time, the drive blocks 5 drive the limit block 22 to slide in the sliding through hole 2, so that the two drive blocks 5 can adapt to the width of the two cables. The screw 17 is screwed and rotated with the fixed cavity 13. Then, the screw 17 drives the sliding plate 14 to slide in the fixed cavity 13 through the fixed part 18. At the same time, the spring 21 on the outside of the screw 17 squeezes and pushes the sliding plate 14. Then, the sliding plate 14 drives the locking post 15 to insert into the locking groove 19 through the connecting plate 16. Then, the slider 9 slides in the sliding groove 8. At this time, the two clamping blocks 10 move closer to each other. Then, the star screw 17 is screwed and rotated with the slider 9. Then, the star screw 17 is inserted into the locking groove 12 for screwing and fixing. At the same time, the pad 20 on one side of the clamping block 10 wraps around the outside of the cable for installation and fixing.

[0027] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A measuring power fitting for ultra-high voltage direct current transmission projects, comprising a fixing frame (1), characterized in that: The fixing frame (1) has a sliding through hole (2) on its inner side. A two-way screw rod (3) passes through the inner side of the fixing frame (1). A handle (4) is fixedly installed at one end of the two-way screw rod (3). Two drive blocks (5) are fitted and screwed onto the outer side of the two-way screw rod (3). A fixing component for clamping the cable is installed at the bottom of the drive block (5). The two sets of fixing components are used to clamp and fix two cables of different widths respectively. A locking component for fixing different positions of the drive block (5) is installed on one side of the drive block (5). The locking component is used to prevent the drive block (5) from shifting or shaking.

2. The measuring power fitting for ultra-high voltage direct current transmission projects according to claim 1, characterized in that: The fixing component includes a connecting block (6) fixedly connected to the bottom of the driving block (5), a mounting plate (7) rotatably connected to the outside of the connecting block (6), a groove (8) is provided at the bottom of the mounting plate (7), and a slider (9) is slidably connected to the inside of the groove (8).

3. The measuring power fitting for ultra-high voltage direct current transmission projects according to claim 2, characterized in that: The fastener also includes clamping blocks (10) that are fixedly installed on the bottom of the mounting plate (7) and the bottom of the slider (9), respectively. A star bolt (11) is threaded through one side of the slider (9), and a plurality of evenly arranged locking slots (12) are provided on the top of the slide groove (8).

4. The measuring power fitting for ultra-high voltage direct current transmission projects according to claim 3, characterized in that: The locking component includes a fixed cavity (13) opened on one side of the drive block (5), a sliding plate (14) is slidably connected to the inside of the fixed cavity (13), and a connecting plate (16) with a locking post (15) is fixedly connected to both ends of the sliding plate (14). A screw (17) is threaded through the inside of the fixed cavity (13). The screw (17) is rotatably connected to the connecting plate (16) through the fixing part (18) and does not detach. Multiple locking grooves (19) are evenly arranged on both sides of the sliding through hole (2).

5. A measuring power fitting for ultra-high voltage direct current transmission projects according to claim 4, characterized in that: One side of the clamping block (10) is fitted with a pad (20) by bolts.

6. A measuring power fitting for ultra-high voltage direct current transmission projects according to claim 5, characterized in that: A spring (21) is fitted on the outside of the screw (17), and the two ends of the spring (21) are fixedly connected to the fixed cavity (13) and the sliding plate (14) respectively.

7. A measuring power fitting for ultra-high voltage direct current transmission projects according to claim 3, characterized in that: The other side of the drive block (5) is fixedly connected to a limiting block (22), which slides inside the sliding through hole (2).

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