An overhead transmission line sag observation training device

Abstract

This invention discloses a training device for observing the sag of overhead transmission lines, relating to the field of power transmission line operation and maintenance training technology. The device includes two bases, with columns fixedly connected to each base. Support arms are rotatably connected to the tops of the columns, and an adjusting rod is hinged between the columns and support arms. A locking assembly is provided at the connection between the columns and support arms, and a protective shell is provided on the outside of the locking assembly. The locking assembly is connected to the side wall of the protective shell via a rotating shaft. A simulated conductor is connected between the ends of the two support arms. When the adjusting rod is extended, the support arms can rotate counterclockwise upwards around the rotating shaft to adjust the sag of the simulated conductor. The training device provided by this invention, by adjusting the height of the support arm ends with the adjusting rod, simulates the actual condition of the transmission line conductor, thereby allowing the instrument to be set up at different locations for sag observation. Infrared laser positioning is used to facilitate accurate sag measurement.

Description

Technical Field

[0001] This invention relates to the field of power transmission line operation and maintenance training technology, specifically to a training device for observing the sag of overhead transmission lines. Background Technology

[0002] With the rapid advancement of ultra-high voltage power grid construction and the continuous expansion of power grid scale, the operation and maintenance of overhead transmission lines has placed higher demands on the professional skills of practitioners. Sag observation, as a core operation item in the erection, acceptance, and operation and maintenance inspection of transmission lines, directly affects the judgment of the line's safe operating margin and the clearance distance for crossings.

[0003] Currently, the transmission line training fields in various power training centers and higher vocational colleges are affected by the actual geographical environment, with varying heights, short spans, and small sags between different towers. When conducting sag observation training, surveying instruments such as theodolites and total stations can usually only be used with a single measurement method, mounted in a fixed position. However, with the refinement of specialized skills training subjects and changes in new employee training methods, according to the requirements of skills level evaluation projects, training sites need to set up instruments in different locations and use the outside-span angle method, inside-span angle method, and end-span angle method for sag observation teaching and assessment. Furthermore, because factors such as the height of the suspension insulator string, the nominal height of the tower, and the span all affect the sag observation values, the observation results from trainees at the same location can vary significantly, which is detrimental to training and assessment.

[0004] Existing training simulation devices cannot flexibly adjust the suspension height and observation angle of the simulated conductor according to the needs of the training subject, and lack precise positioning reference methods, making it difficult to meet the needs of standardized training and assessment for multiple subjects, multiple angles, and repeatability. Summary of the Invention

[0005] The main objective of this invention is to provide a training device for observing the sag of overhead transmission lines, so as to overcome the problems existing in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A training device for observing the sag of an overhead transmission line includes two bases, on which a column is fixedly connected. A support arm is rotatably connected to the top of the column. An adjusting rod is hinged between the column and the support arm. A locking assembly is provided at the connection between the column and the support arm. A protective shell is provided on the outside of the locking assembly. The locking assembly is connected to the side wall of the protective shell through a rotating shaft. The two support arms are connected by a simulated wire. When the adjusting rod is extended, the support arm can rotate counterclockwise upward around the pivot to adjust the sag of the simulated wire.

[0007] Furthermore, the locking assembly includes a ratchet, a pawl, and a locking member. The ratchet is connected to the rotating shaft, one end of the pawl is rotatably connected to the support arm, and the other end engages with the ratchet. The locking member is detachably connected to the protective shell and is used to lock the position of the ratchet. The ratchet engages with the pawl to prevent the support arm from rotating clockwise downwards.

[0008] Furthermore, a groove is provided on one side of the ratchet, and multiple locking holes are evenly distributed in the groove along the circumferential direction. The bottom of the locking member is inserted into the groove, and the bottom of the locking member is provided with multiple locking rods that cooperate with the locking holes.

[0009] Furthermore, the protective shell has a mounting hole on its side wall, the locking member is inserted into the mounting hole, and the top of the locking member has an end cap, the diameter of which is larger than the inner diameter of the mounting hole.

[0010] Furthermore, the base adopts an I-shaped structure, including two horizontal bars and a vertical bar connected between the two horizontal bars, and the end of the vertical bar is connected to the horizontal bars through a damping pivot.

[0011] Furthermore, the crossbar includes a first sleeve and a first telescopic tube slidably disposed within the first sleeve, and the vertical bar includes a second sleeve and a second telescopic tube slidably disposed within the second sleeve.

[0012] Furthermore, the column includes a first outer sleeve and a first inner sleeve movably connected to the first outer sleeve, the first outer sleeve being fixedly mounted on the second sleeve, and the support arm includes a second outer sleeve and a second inner sleeve movably connected to the second outer sleeve, the end of the second outer sleeve being hinged to the top of the first inner sleeve.

[0013] Furthermore, the first outer sleeve is provided with a plurality of adjustment holes along its height direction, and the outer wall of the first inner sleeve is provided with a groove, in which a spring is provided, and the end of the spring is connected to a limiting post, which can be engaged in the adjustment hole under the action of the spring.

[0014] Furthermore, the adjusting rod is an electric telescopic rod, with one end hinged to the outer wall of the protective shell and the other end hinged to the lug at the bottom of the second outer sleeve.

[0015] Furthermore, an infrared laser locator is provided at the end of the second inner sleeve, and the infrared laser locator is fixed above the suspension point of the simulated wire by a magnetic base.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By setting up a rotatable support arm and a telescopic adjustment rod, the sag of the simulated conductor can be adjusted flexibly and precisely, thereby realistically simulating the sag state of the transmission line under different working conditions. During training, trainees can set up the measuring instrument at any position according to the requirements of the skill level evaluation items, and conduct observation practice and evaluation using the outside angle method, inside angle method and end angle method respectively. This effectively solves the problem that the existing device cannot meet the training needs of multiple subjects and multiple angles, and significantly improves the versatility and teaching practicality of the training device. A locking assembly consisting of a ratchet, pawl, and locking element is provided at the connection between the column and the support arm. When the adjusting rod drives the support arm to rotate counterclockwise upward to increase the sag, the ratchet and pawl cooperate to automatically prevent the support arm from falling back clockwise due to gravity, realizing a one-way self-locking function. In addition, during the adjustment process, since the ratchet has multiple teeth on the outside, it is equivalent to adding gears. During the upward rotation of the support arm, each tooth passes, which is equivalent to adjusting a gear. This allows the user to clearly understand the gear being adjusted, thereby determining the increased height of the support arm, which is more convenient for teaching and training. An infrared laser locator is installed at the end of the support arm (directly above the simulated traverse suspension point). This locator can emit a laser beam downwards to provide trainees with a precise vertical reference point for setting up surveying instruments such as theodolites and total stations. This facilitates the rapid determination of the starting position of observation and the measurement baseline, thereby significantly reducing observation errors caused by instrument setup deviations. This ensures that the measurement results of different trainees on the same device have good consistency, meeting the requirements of standardized training and objective quantitative assessment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a front view of the training unit of the present invention.

[0019] Figure 3 This is a top view of the training unit of the present invention.

[0020] Figure 4 This is a schematic diagram of the internal structure of the protective shell of the present invention.

[0021] Figure 5 This is an exploded structural diagram of the ratchet and locking mechanism of the present invention.

[0022] Figure 6 This is a schematic diagram of the internal structure of the column of the present invention.

[0023] Figure 7 This is a partial enlarged view of point A in the present invention.

[0024] Explanation of reference numerals in the attached drawings: 1-base, 11-horizontal bar, 12-vertical bar, 2-column, 21-first outer sleeve, 22-first inner sleeve, 23-adjustment hole, 24-groove, 25-spring, 26-limiting post, 3-support arm, 31-second outer sleeve, 32-second inner sleeve, 33-lifting lug, 4-adjustment rod, 5-protective shell, 51-ratchet, 511-sinking groove, 512-locking hole, 52-pawl, 53-locking component, 531-locking rod, 532-end cap, 6-rotating shaft, 7-simulated wire, 8-infrared laser positioner. Detailed Implementation

[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Combination Figures 1 to 7 This embodiment provides a training device for observing the sag of overhead transmission lines, including two bases 1, with a column 2 fixedly connected to the base 1. A support arm 3 is rotatably connected to the top of the column 2. An adjusting rod 4 is hinged between the column 2 and the support arm 3. A locking assembly is provided at the connection between the column 2 and the support arm 3. A protective shell 5 is provided on the outside of the locking assembly. The locking assembly is connected to the side wall of the protective shell 5 through a rotating shaft 6. A simulated conductor 7 is connected between the ends of the two support arms 3. When the adjusting rod 4 is extended, the support arm 3 can rotate counterclockwise upward around the rotating shaft 6 to adjust the sag of the simulated conductor 7.

[0027] Using this scheme, the height of the end of the support arm 3 is adjusted by adjusting rod 4. With the locking component, the support arm 3 can be automatically locked after the height is adjusted, making the device more stable, ensuring lifting accuracy, and better simulating different conditions of power transmission line conductors, which is beneficial for training.

[0028] like Figure 2 and 4 As shown, in this embodiment, the locking assembly includes a ratchet 51, a pawl 52, and a locking member 53. The ratchet 51 is connected to the rotating shaft 6. One end of the pawl 52 is rotatably connected to the support arm 3, and the other end engages with the ratchet 51. The locking member 53 is detachably connected to the protective shell 5 and is used to lock the position of the ratchet 51. The pawl 52 rotates on the support arm 3 via a connecting shaft, and a torsion spring is connected between the support arm 3 and the pawl 52. The ratchet 51 and the pawl 52 engage to prevent the support arm 3 from rotating clockwise downwards.

[0029] like Figure 5As shown, a groove 511 is provided on one side of the ratchet 51. Multiple locking holes 512 are evenly distributed along the circumference within the groove 511. The bottom of the locking member 53 is inserted into the groove 511, and the bottom of the locking member 53 has multiple locking rods 531 that mate with the locking holes 512. An installation hole is provided on the side wall of the protective shell 5. The locking member 53 is inserted into the installation hole, and an end cap 532 is provided on the top of the locking member 53. The diameter of the end cap 532 is larger than the inner diameter of the installation hole.

[0030] In this design, multiple locking rods 531 at the bottom of the locking component 53 are inserted into multiple locking holes 512 within the recess 511, achieving circumferential positioning and locking of the ratchet 51. The simultaneous insertion of multiple locking rods 531 prevents excessive force at a single point from causing deformation or damage, while also distributing the load.

[0031] like Figure 3 As shown, in this embodiment, the base 1 includes two horizontal bars 11 and a vertical bar 12 connected between the two horizontal bars 11. The end of the vertical bar 12 is connected to the horizontal bars 11 via a damping pivot. The horizontal bar 11 includes a first sleeve and a first telescopic tube slidably disposed within the first sleeve, and the vertical bar 12 includes a second sleeve and a second telescopic tube slidably disposed within the second sleeve.

[0032] With this design, the angles of the column 2 and the support arm 3 can be adjusted by rotating the vertical rod 12. The damping shaft provides rotational damping, allowing the vertical rod to maintain its position after the angle is adjusted without the need for an additional locking mechanism. The lengths of both the horizontal rod 11 and the vertical rod 12 can be adjusted.

[0033] like Figure 3 As shown, in this embodiment, the support arm 3 includes a second outer sleeve 31 and a second inner sleeve 32 movably connected to the second outer sleeve 31. The end of the second outer sleeve 31 is hinged to the top of the first inner sleeve 22. This design allows for adjustment of the length of the support arm 3.

[0034] like Figure 6-7 As shown, in this embodiment, the column 2 includes a first outer sleeve 21 and a first inner sleeve 22 movably connected in the first outer sleeve 21. The first outer sleeve 21 is fixedly mounted on the second sleeve. Furthermore, the first outer sleeve 21 is provided with a plurality of adjustment holes 23 along its height direction. The outer wall of the first inner sleeve 22 is provided with a groove 24. A spring 25 is provided in the groove 24. The end of the spring 25 is connected to a limiting post 26. The limiting post 26 can be engaged in the adjustment hole 23 under the action of the spring 25.

[0035] Using this scheme, pressing the limiting post 26 compresses the spring 25, adjusting the height of the first inner sleeve 22. Once the predetermined position is reached, the limiting post 26 springs into the adjusting hole 23 under the force of the spring 25, locking it in place. Adjusting the overall height of the column 2 achieves the adjustment of the height of the support arm 3. This is a large-range coarse height adjustment, achieved through the cooperation of the limiting post 26 and the adjusting hole 23. After adjustment of the first inner sleeve 22, it is stabilized at a certain height. Through the coarse adjustment of the column 2 and the precise adjustment of the adjusting rod 4, the height of the support arm 3 can be adjusted, providing better control over the height range and accuracy, and better simulating different conditions of power transmission line conductors.

[0036] Specifically, the base 1 adopts an I-shaped structure, and both the horizontal bar 11 and the vertical bar 12 are telescopic sleeves. The column 2 and the support arm 3 also have telescopic adjustment functions. Through the multi-stage telescopic and folding design, on the one hand, it can simulate line scenarios under different tower heights and different spans, which is closer to the real power transmission environment; on the other hand, the device can be retracted and folded when not in use, which greatly reduces the storage and transportation volume and facilitates flexible deployment in mountainous areas or training sites with limited space.

[0037] like Figure 2 As shown, in this embodiment, the adjusting rod 4 is an electric telescopic rod, with one end hinged to the outer wall of the protective shell 5 and the other end hinged to the lug 33 at the bottom of the second outer sleeve 31. The end of the second inner sleeve 32 is provided with an infrared laser locator 8, which is fixed above the suspension point of the simulated wire 7 by a magnetic base.

[0038] The device employs an electric telescopic rod for automatic extension and retraction, facilitating easy adjustment of the height of the support arm 3. Combined with the quick coarse adjustment structure of the spring-loaded limit post 26 and adjustment hole 23 on the column 2, rapid and continuous adjustment of the simulated conductor height and sag is achieved. Operators can complete device setup and parameter changes without the need for complex tools, effectively shortening preparation time when switching training subjects and improving training efficiency.

[0039] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A training device for observing sag of overhead transmission lines, characterized in that, It includes two bases (1), on which a column (2) is fixedly connected. A support arm (3) is rotatably connected to the top of the column (2). An adjusting rod (4) is hinged between the column (2) and the support arm (3). A locking assembly is provided at the connection between the column (2) and the support arm (3). A protective shell (5) is provided on the outside of the locking assembly. The locking assembly is connected to the side wall of the protective shell (5) through a rotating shaft (6). Among them, a simulated wire (7) is connected between the ends of the two support arms (3). When the adjusting rod (4) is extended, the support arm (3) can rotate counterclockwise upward around the pivot (6) to adjust the sag of the simulated wire (7).

2. The overhead transmission line sag observation training device as described in claim 1, characterized in that, The locking assembly includes a ratchet (51), a pawl (52), and a locking member (53). The ratchet (51) is connected to the rotating shaft (6). One end of the pawl (52) is rotatably connected to the support arm (3), and the other end cooperates with the ratchet (51). The locking member (53) is detachably connected to the protective shell (5) and is used to lock the position of the ratchet (51). The ratchet (51) and the pawl (52) cooperate to prevent the support arm (3) from rotating clockwise downwards.

3. The overhead transmission line sag observation training device as described in claim 2, characterized in that, The ratchet (51) has a groove (511) on one side, and a plurality of locking holes (512) are evenly distributed in the groove (511) along the circumferential direction. The bottom of the locking member (53) is inserted into the groove (511), and the bottom of the locking member (53) is provided with a plurality of locking rods (531) that cooperate with the locking holes (512).

4. The overhead transmission line sag observation training device as described in claim 3, characterized in that, The protective shell (5) has an installation hole on its side wall. The locking member (53) is inserted into the installation hole. The top of the locking member (53) is provided with an end cap (532). The diameter of the end cap (532) is larger than the inner diameter of the installation hole.

5. The overhead transmission line sag observation training device as described in claim 1, characterized in that, The base (1) adopts an I-shaped structure, including two horizontal bars (11) and a vertical bar (12) connected between the two horizontal bars (11). The end of the vertical bar (12) is connected to the horizontal bar (11) through a damping shaft.

6. The overhead transmission line sag observation training device as described in claim 5, characterized in that, The horizontal bar (11) includes a first sleeve and a first telescopic tube slidably disposed within the first sleeve, and the vertical bar (12) includes a second sleeve and a second telescopic tube slidably disposed within the second sleeve.

7. The overhead transmission line sag observation training device as described in claim 6, characterized in that, The column (2) includes a first outer sleeve (21) and a first inner sleeve (22) movably connected in the first outer sleeve (21). The first outer sleeve (21) is fixedly mounted on the second sleeve. The support arm (3) includes a second outer sleeve (31) and a second inner sleeve (32) movably connected in the second outer sleeve (31). The end of the second outer sleeve (31) is hinged to the top of the first inner sleeve (22).

8. The overhead transmission line sag observation training device as described in claim 7, characterized in that, The first outer sleeve (21) has multiple adjustment holes (23) along its height direction. The outer wall of the first inner sleeve (22) has a groove (24). A spring (25) is provided in the groove (24). The end of the spring (25) is connected to a limiting post (26). The limiting post (26) can be engaged in the adjustment hole (23) under the action of the spring (25).

9. The overhead transmission line sag observation training device as described in claim 7, characterized in that, The adjusting rod (4) is an electric telescopic rod, with one end hinged to the outer wall of the protective shell (5) and the other end hinged to the lug (33) at the bottom of the second outer sleeve (31).

10. The overhead transmission line sag observation training device as described in claim 7, characterized in that, The end of the second inner sleeve (32) is provided with an infrared laser locator (8), which is fixed above the suspension point of the simulated wire (7) by a magnetic base.

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