An easy-to-operate transformer output power measurement device

Abstract

This invention relates to an easily operable transformer outgoing line power measurement device, comprising a standard meter and three clamp-on current transformers, and a portable housing. The portable housing includes a lower housing and an upper housing hinged together, with the standard meter and clamp-on current transformers respectively fitted inside the lower and upper housings. The upper housing contains an outer partition and an inner partition arranged sequentially from the outside in. A winding shaft is rotatably fitted onto the inner partition. The number of winding shafts is equal to the number of clamp-on current transformers and they are arranged in a one-to-one correspondence. The winding shaft is a hollow cylindrical tube, and a conductive slip ring is provided on it. An extension wire is wound around a section of the winding shaft between the outer and inner partitions. One end of the extension wire is connected to the clamp-on current transformer, and the other end passes through the winding shaft and connects to the rotating end of the conductive slip ring. The fixed end of the conductive slip ring is connected to the standard meter. This invention allows for convenient portability of the testing tool, enabling it to be positioned on utility poles while avoiding tangling and knotting between wires.

Description

Technical Field

[0001] This invention belongs to the field of transformer substation line loss detection technology, and particularly relates to a transformer outgoing line power measurement device that is easy to operate. Background Technology

[0002] In a power system, a distribution area refers to the power supply range or region of a single transformer. Currently, abnormal line losses may occur in the outgoing lines of a distribution area, such as electricity theft or leakage. In such cases, the lines must be inspected promptly. The inspection uses a clamp-on current transformer for testing. Workers need to carry the clamp-on current transformer and a standard meter, and may need to climb to a height to perform the inspection. The clamp-on current transformer is attached to the outgoing line of the meter under test, and the outgoing current is measured. The measurement signal is transmitted to the standard meter via a wired connection, and the standard meter displays the measurement data, which is used to determine if abnormal line losses exist.

[0003] For a single-phase meter under test, only one clamp-on current transformer is needed; however, for a three-phase meter under test, three clamp-on current transformers are required, each connected to the standard meter via wired connections. This results in more wires between the clamp-on current transformers and the standard meter, which may become tangled during testing. Furthermore, if the test is to be performed at a high location, carrying and retrieving the numerous testing tools becomes inconvenient for workers. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a transformer output power measurement device that is easy to operate.

[0005] This invention is achieved through the following technical solution:

[0006] A transformer output power measurement device that is easy to operate, the power detection device includes a standard meter and three clamp-on current transformers, and also includes a portable housing for easy installation of the meter and transformers. The portable housing includes a lower housing and an upper housing that are hinged to each other for easy opening and closing of the portable housing. The standard meter and the clamp-on current transformers are respectively fitted into the lower housing and the upper housing.

[0007] The upper housing is provided with an outer partition and an inner partition from the outside to the inside to facilitate the partitioning of the upper housing. The clamp-on current transformer is placed outside the outer partition. The inner partition is rotatably fitted with a winding shaft, which facilitates the winding of wires. The number of winding shafts is equal to that of the clamp-on current transformers and they are arranged in a one-to-one correspondence. The winding shaft is in the shape of a hollow round tube and is provided with a conductive slip ring. An extension wire is wound on the section of the winding shaft between the outer partition and the inner partition. One end of the extension wire is connected to the clamp-on current transformer, and the other end passes through the winding shaft and is connected to the rotating end of the conductive slip ring. The fixed end of the conductive slip ring is connected to a standard meter.

[0008] The distance between the outer partition and the inner partition is greater than the diameter of the extension line but less than twice the diameter of the extension line, providing sufficient space for the extension line.

[0009] Furthermore, the outer partition includes an integrally formed upper section and a lower section. The longitudinal section of the upper section is I-shaped, and the longitudinal section of the lower section is an inverted L-shaped section. The horizontal end of the lower section is connected to the lower end of the upper section, and the vertical section is located outside the upper section. The vertical surfaces of the upper section and the lower section are not on the same plane.

[0010] The winding shaft is rotatably mounted on the upper section, and the horizontal section of the lower section has an opening to facilitate the passage of the extension line. The extension line passes through the opening and connects to the clamp-on current transformer.

[0011] Furthermore, a guide assembly is provided inside the upper housing. The guide assembly includes a guide wheel, which is rotatably disposed in the space between the lower section of the outer partition and the inner partition to facilitate the arrangement of the extension line. The end of the extension line away from the conductive slip ring is wound downward around the guide wheel, and then passes upward through the opening of the lower section and connects to the clamp-on current transformer.

[0012] Furthermore, a drive wheel is fixedly fitted onto a section of the take-up shaft located inside the inner partition. The three drive wheels are connected by a belt or chain drive, which facilitates the synchronous and unidirectional rotation of the three take-up shafts.

[0013] Furthermore, one of the take-up shafts is fixedly fitted with a ratchet, and a take-up handle is longitudinally slidably provided on the upper part of the upper housing. The take-up handle is n-shaped, with the horizontal section of the take-up handle located above the upper housing. The two vertical sections of the take-up handle are located on both sides of the ratchet and are respectively provided with a first ratchet bar and a second ratchet bar, which facilitates the control of the two ratchet bars moving up and down. The upper ends of the first ratchet bar and the second ratchet bar are respectively hinged to the lower ends of the two vertical sections of the take-up handle. A torsion spring is provided between the first ratchet bar and the second ratchet bar and the take-up handle. The torsion spring drives the first ratchet bar or the second ratchet bar to rotate toward the ratchet bar, causing the ratchet bar to come closer to and engage with the ratchet bar.

[0014] When the take-up handle moves the first and second ratchet bars downwards, the lower end of the first ratchet bar actuates the ratchet wheel to rotate forward. When the take-up handle moves the first and second ratchet bars upwards, the lower end of the second ratchet bar actuates the ratchet wheel to rotate forward, which facilitates the forward rotation of the take-up shaft and enables the take-up of the extension cable.

[0015] Furthermore, limit rods are provided on the inner sides of both the first and second ratchet bars;

[0016] When the reel handle moves the first and second ratchet bars upwards until their lower ends disengage from the ratchet, the limiting rods of the first and second ratchet bars abut against each other. At this time, the lower ends of the first and second ratchet bars are spaced apart and located on both sides of the ratchet axis.

[0017] Furthermore, the power detection device also includes two sets of fixing components to facilitate fixing the portable case to the utility pole. The two sets of fixing components are located on both sides of the portable case. The fixing components include a fixing strap and a fixing hook. One end of the fixing strap is connected to the bottom rear end of the upper case and the other end is connected to the fixing hook. The fixing hook is fastened to the bottom rear end of the lower case.

[0018] When fixing the power detection device to the utility pole, the upper and lower housings are opened so that the rear end face of the upper housing and the end face of the lower housing fit against the outer circumference of the utility pole, and the utility pole is clamped by the fixing strap.

[0019] Furthermore, the fixing assembly also includes a winding shaft, which is rotatably disposed within the upper housing and located inside the inner partition, and the fixing strap is wound and housed within the winding shaft.

[0020] Furthermore, the winding shaft is a hollow circular tube structure, and a drive shaft is provided inside the winding shaft. A ratchet structure is provided between the drive shaft and the winding shaft. The ratchet structure prevents the fixing belt on the winding shaft from being released outward, and one end of the drive shaft extends outward from the upper housing.

[0021] The drive shaft is configured with a tape-releasing state and a tape-retracting state. When the drive shaft is in the tape-releasing state, the ratchet and tooth structure is disabled, and the fixed tape can be released outward. When the drive shaft is in the tape-retracting state, the ratchet and tooth structure is effective, and the fixed tape cannot be released outward.

[0022] The drive shaft is axially slidably fitted inside the winding shaft. When the drive shaft slides outward, it is in the unwinding state, and when it slides inward, it is in the winding state.

[0023] Furthermore, the winding shaft end is provided with an inlet section and a ratchet section from the outside to the inside. The inner diameter cross-section of the inlet section is a frustum shape with a larger outer diameter and a smaller inner diameter. The inner wall of the ratchet section is ratchet-shaped. A pawl is rotatably provided on the drive shaft via a torsion spring.

[0024] When the drive shaft is in the unloading state, the pawl is located in the inlet section; when the drive shaft is in the retraction state, the pawl is located in the ratchet section.

[0025] The beneficial effects of the present invention through the above technical solution are:

[0026] The portable case of this invention consists of an upper shell and a lower shell, which can respectively house a standard electricity meter and a clamp-on current transformer, thus enabling convenient carrying of the testing tools. The upper shell contains three clamp-on current transformers, each corresponding to a winding shaft, and the three winding shafts are synchronously controlled via belt / chain drive.

[0027] The present invention features an extension wire wound around a take-up spool. The forward rotation of the take-up spool winds up the extension wire. One end of the extension wire passes over a guide wheel and connects to a clamp-on current transformer, while the other end connects to a conductive slip ring, which in turn connects to a standard electricity meter. In this way, the standard electricity meter and the clamp-on current transformer can be connected via the extension wire, ensuring the extension wire remains neat and organized.

[0028] The reel handle of this invention can simultaneously move the first and second ratchet bars upwards and downwards, thereby driving the ratchet to rotate clockwise. This enables the take-up shaft to rotate clockwise, facilitating the winding of the extension cable and preventing tangling. When the first and second ratchet bars disengage from the ratchet simultaneously, the take-up shaft can rotate freely, allowing the extension cable to be easily released.

[0029] The fixing strap of this invention can fix the portable case to the utility pole. The fixing strap can be wound and released under the ratchet and tooth structure, thereby adjusting the length of the fixing strap. It can be used for utility poles of different diameters and ensures the reliability of the installation. Attached Figure Description

[0030] Figure 1 This is an isometric view of a transformer output power measuring device that is easy to operate according to the present invention.

[0031] Figure 2 This is a cross-sectional view of a transformer output power measuring device that is easy to operate according to the present invention.

[0032] Figure 3 This invention provides an easy-to-operate transformer outgoing line power measurement device. Figure 2 Middle and upper shell sectional view;

[0033] Figure 4 This is a schematic diagram of the extension line arrangement of a transformer output power measuring device that is easy to operate according to the present invention.

[0034] Figure 5 This is a schematic diagram of three transmission wheels of a transformer output power measuring device that is easy to operate according to the present invention;

[0035] Figure 6 This is a top view of the winding shaft and drive shaft of a transformer output power measuring device that is easy to operate according to the present invention.

[0036] Figure 7This is a schematic diagram showing the separation of the winding shaft and drive shaft of a transformer output power measuring device that is easy to operate according to the present invention;

[0037] Figure 8 This is a cross-sectional view of the winding shaft and drive shaft of a transformer output power measuring device that is easy to operate according to the present invention.

[0038] The components include: 1. Standard electricity meter; 2. Clamp-on current transformer; 3. Portable housing; 31. Lower housing; 32. Upper housing; 4. Outer partition; 41. Upper section; 42. Lower section; 5. Inner partition; 6. Rewinding shaft; 7. Conductive slip ring; 8. Extension cord; 9. Guide wheel; 91. Shaft; 92. Wheel; 10. Opening; 11. Drive wheel; 12. Ratchet; 13. Rewinding handle; 14. First ratchet; 15. Second ratchet; 16. Limiting rod; 17. Fixing strap; 18. Fixing hook; 19. Winding shaft; 20. Drive shaft; 201. Hand-tightening section; 22. Guide section; 23. Ratchet section; 24. Pawl; 25. Locking block; 26. Utility pole. Detailed Implementation

[0039] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] 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.

[0041] An easy-to-operate transformer output power measurement device includes a standard meter 1 and three clamp-on current transformers 2, which are the tools required for power detection. To facilitate carrying and use of the tool, a portable case 3 is also included, into which the tool can be stored for easy portability.

[0042] The portable case 3 includes a lower case 31 and an upper case 32 that are hinged together, allowing the case to be opened and closed. Both the upper case 32 and the lower case 31 have rectangular recessed structures, with the standard meter 1 and the clamp-on current transformer respectively fitted into the lower case 31 and the upper case 32, achieving separate placement of the standard meter 1 and the clamp-on current transformer. Both the standard meter 1 and the clamp-on current transformer can be removed from their respective cases.

[0043] An outer partition 4 and an inner partition 5 are sequentially arranged from the outside to the inside within the upper housing 32. The outer partition 4 includes an integrally formed upper section 41 and a lower section 42. The longitudinal section of the upper section 41 is I-shaped, and the longitudinal section of the lower section 42 is an inverted L-shape. One end of the horizontal section of the lower section 42 is connected to the lower end of the upper section 41, and the vertical section of the lower section 42 is located outside the upper section 41. Thus, the vertical section of the lower section 42 and the upper section 41 are arranged in parallel with a staggered vertical arrangement, with the vertical section of the lower section 42 closer to the opening of the upper housing 32. Three clamp-on current transformers are placed side by side outside the outer partition 4, with the clamp-on current transformers and the horizontal section of the upper section 41 arranged vertically.

[0044] A winding shaft 6 is rotatably fitted onto the inner partition 5. The axial direction of the winding shaft 6 is aligned with the thickness direction of the upper housing 32. The number of winding shafts 6 and clamp-on current transformers are equal and they are arranged in a one-to-one correspondence. The winding shaft 6 is a hollow cylindrical tube and can rotate relative to the inner partition 5. One end of the winding shaft 6 abuts against the outer partition 4, and the other end passes through the inner partition 5 and abuts against the side wall of the upper housing 32.

[0045] Each take-up shaft 6 is fitted with a conductive slip ring 7. The rotating end of the conductive slip ring 7 is connected and fixed to the take-up shaft 6. The fixed end of the conductive slip ring 7 is located on the inner partition 5, and this fixed end is connected to the standard meter 1 through a wire. After the wire is connected to the fixed end of the conductive slip ring 7, it extends out of the upper housing 32 and into the lower housing 31, and finally connects to the standard meter 1.

[0046] Each take-up spool 6 has an extension wire 8 wound around the portion between the outer partition 4 and the inner partition 5. The extension wire 8 is an electrical wire, and it is wound around the circumference of the take-up spool 6. One end of the extension wire 8 is connected to a clamp-on current transformer, and the other end passes radially into the take-up spool 6 and is connected to the rotating end of the conductive slip ring 7. The distance between the outer partition 4 and the inner partition 5 is greater than the diameter of the extension wire 8 but less than twice the diameter of the extension wire 8.

[0047] To connect the extension cable 8 to the clamp-on current transformer, an opening 10 is provided in the horizontal section of the lower segment 42 of the outer partition 4. The extension cable 8 passes through the opening 10 and connects to the clamp-on current transformer. To guide the extension cable 8, a guide assembly is provided inside the upper housing 32. The guide assembly includes a guide wheel 9, which is rotatably disposed in the space between the lower segment 42 of the outer partition 4 and the inner partition 5. The guide wheel 9 includes a shaft 91 and three wheel bodies 92 spaced apart on the shaft 91, with each wheel body 92 corresponding to a clamp-on current transformer. The end of the extension cable 8 furthest from the conductive slip ring 7 is wound downwards around the guide wheel 9, and then passes upwards through the opening 10 of the lower segment 42 and connects to the clamp-on current transformer, thus realizing the electrical connection between the clamp-on current transformer and the conductor slip ring.

[0048] In order to achieve the linkage control of the three take-up shafts 6, a drive wheel 11 is fixedly fitted on a section of each take-up shaft 6 located inside the inner partition 5. The three drive wheels 11 are connected by belt or chain drive, which can realize the synchronous rotation of the three take-up shafts 6 in the same direction.

[0049] To facilitate driving the take-up shaft 6, a ratchet 12 is fixedly fitted onto the middle take-up shaft 6. The rotation of the ratchet 12 drives the take-up shaft 6 to rotate. A take-up handle 13 is longitudinally slidably mounted on the upper part of the upper housing 32. The sliding direction of the take-up handle 13 is consistent with the radial direction of the ratchet 12. The take-up handle 13 is n-shaped. The horizontal section of the take-up handle 13 extends out of the upper housing 32 and is located above the upper housing 32. The two vertical sections of the take-up handle 13 are located on both sides of the ratchet 12 and are respectively provided with a first ratchet bar 14 and a second ratchet bar 15. The first ratchet bar 14 and the second ratchet bar 15 are arranged in a "U" shape on both sides of the ratchet 12.

[0050] The upper ends of the first ratchet 14 and the second ratchet 15 are respectively hinged to the lower ends of the two vertical sections of the take-up handle 13. A torsion spring is provided between the first ratchet 14, the second ratchet 15 and the take-up handle 13. The torsion spring drives the first ratchet 14 or the second ratchet 15 to rotate toward the ratchet 12, ensuring that the lower ends of the two ratchets always tend to move toward the ratchet 12.

[0051] When the take-up handle 13 is pressed down, simultaneously moving the first ratchet 14 and the second ratchet 15 downwards, the lower end of the first ratchet 14 actuates the ratchet 12 to rotate clockwise, causing all three take-up spools 6 to rotate clockwise simultaneously. When the take-up handle 13 is lifted, simultaneously moving the first ratchet 14 and the second ratchet 15 upwards, the lower end of the second ratchet 15 actuates the ratchet 12 to rotate clockwise, causing all three take-up spools 6 to rotate clockwise simultaneously. By repeatedly moving the take-up handle 13 up and down, the take-up spools 6 can be kept rotating clockwise to wind the take-up extension line 8.

[0052] If extension line 8 needs to be released, the control of ratchet 12 must be released, meaning the first ratchet 14 and the second ratchet 15 are no longer engaged with ratchet 12. For this purpose, limit rods 16 are provided on the inner sides of both the first and second ratchet 14 and 15, arranged in an inverted V-shape. When the take-up handle 13 moves the first and second ratchet 14 and 15 upwards until their lower ends disengage from ratchet 12, the limit rods 16 of the first and second ratchet 14 abut against each other. At this point, the lower ends of the first and second ratchet 14 and 15 are spaced apart and located on opposite sides of the ratchet 12 axis. Ratchet 12 is in a free state, and the extension line 8 can be manually pulled out from the take-up spool 6.

[0053] To facilitate on-site testing, the portable case 3 needs to be fixed to the utility pole 26, allowing for easy carrying and movement. Therefore, the power detection device includes two sets of fixing components to secure the portable case 3 and the utility pole 26. These components are located on both sides of the portable case 3 and include a fixing strap 17 and a fixing hook 18. One end of the fixing strap 17 is connected to the bottom rear end of the upper housing 32, and the other end is connected to the fixing hook 18, which engages with the bottom rear end of the lower housing 31. When the power detection device is fixed to the utility pole 26, the upper housing 32 and the lower housing 31 are opened, allowing the rear end face of the upper housing 32 and the end face of the lower housing 31 to fit against the outer circumference of the utility pole 26. The fixing strap 17 then clamps the utility pole 26, thus installing the portable case 3.

[0054] To ensure the tightness and reliability of the installation, the fixing assembly also includes a winding shaft 19, which is a hollow circular tube structure. The winding shaft 19 is rotatably disposed within the upper housing 32 and located inside the inner partition 5. The fixing strap 17 is wound and housed within the winding shaft 19. A drive shaft 20 is provided inside the winding shaft 19, that is, the drive shaft 20 is axially slidably fitted inside the winding shaft 19, so that the drive shaft 20 can rotate or slide axially within the winding shaft 19.

[0055] The drive shaft 20 is axially aligned with the guide wheel 9. One end of the drive shaft 20 extends outward from the upper housing 32, and this extended portion is a hand-tightening section 201, which is larger than the drive shaft 20. A ratchet structure is provided between the drive shaft 20 and the winding shaft 19 to prevent the fixing belt 17 on the winding shaft 19 from being released outward. Specifically, from the outside to the inside, one end of the winding shaft 19 has an inlet section 22 and a ratchet section 23. The inner diameter of the inlet section 22 is a frustum-shaped cross-section with a larger outer diameter and a smaller inner diameter. The inner wall of the ratchet section 23 is ratchet-shaped, and the ratchet section 23 and the inlet section 22 are connected. A pawl 24 is rotatably mounted on the drive shaft 20 via a torsion spring. The length of the ratchet section 23 is greater than that of the pawl 24, allowing the pawl 24 to move axially within the ratchet section 23. Meanwhile, a locking block 25 is provided on the side wall of the upper housing 32. One end of the drive shaft 20 is prismatic and can be inserted into the locking block 25. At this time, the drive shaft 20 cannot rotate.

[0056] The drive shaft 20 has a belt unloading state and a belt retraction state. When the drive shaft 20 slides inward, it is in the belt unloading state; when the drive shaft 20 slides outward, it is in the belt retraction state. When the drive shaft 20 is in the belt unloading state: pulling the drive shaft 20 outward causes the end of the drive shaft 20 to disengage from the locking block 25 and the pawl 24 and move to the guide section 22. At this time, the ratchet and ratchet tooth structure is ineffective, and the fixed belt 17 can be released outward.

[0057] When the drive shaft 20 is in the winding state: Press the drive shaft 20 inward to make the pawl 24 located in the ratchet section 23. At this time, the ratchet tooth structure is effective, and the fixed belt 17 cannot be released outward. The drive shaft 20 can be rotated to drive the winding shaft 19 to rotate, thereby winding the fixed belt 17. Then, press the drive shaft 20 again to make its end insert into the locking block 25, thereby fixing the drive shaft 20 and the winding shaft 19.

[0058] The principle of this invention is as follows: After bringing the portable case 3 to the site, first open the portable case 3 and fix it to the utility pole 26 using the fixing strap 17. Then, pull the take-up handle 13 upwards until the first ratchet bar 14 and the second ratchet bar 15 disengage from the ratchet wheel 12. At this point, the extension cable 8 can be released freely. Since the extension cable 8 has a corresponding take-up and release path, it is not easy to get tangled or knotted. The worker uses a clamp-on current transformer in conjunction with a standard multimeter 1 to detect the electrical quantity. After the detection, repeatedly pull the take-up handle 13 to cause the first ratchet bar 14 and the second ratchet bar 15 to drive the ratchet wheel 12 to rotate forward, thereby achieving the winding of the extension cable 8 and ensuring the neatness of the extension cable 8.

[0059] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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 transformer outgoing line power measurement device that is easy to operate, comprising a power detection device, wherein the power detection device includes a standard meter (1) and three clamp-on current transformers (2), characterized in that, It also includes a portable case (3), which includes a lower case (31) and an upper case (32) that are hinged to each other, and the standard meter (1) and the clamp-on current transformer are respectively fitted into the lower case (31) and the upper case (32); The upper housing (32) is provided with an outer partition (4) and an inner partition (5) arranged sequentially from the outside to the inside. The clamp-on current transformer is placed outside the outer partition (4). The inner partition (5) is rotatably fitted with a winding shaft (6). The number of winding shafts (6) is equal to that of the clamp-on current transformers and they are arranged in a one-to-one correspondence. The winding shaft (6) is in the shape of a hollow round tube. A conductive slip ring (7) is provided on the winding shaft (6). An extension line (8) is wound on a section of the winding shaft (6) between the outer partition (4) and the inner partition (5). One end of the extension line (8) is connected to the clamp-on current transformer, and the other end passes through the winding shaft (6) and is connected to the rotating end of the conductive slip ring (7). The fixed end of the conductive slip ring (7) is connected to the standard meter (1). The distance between the outer partition (4) and the inner partition (5) is greater than the diameter of the extension line (8) but less than twice the diameter of the extension line (8).

2. The transformer outgoing line power measurement device that is easy to operate according to claim 1, characterized in that, The outer partition (4) includes an integrally formed upper section (41) and a lower section (42). The longitudinal section of the upper section (41) is shaped like an L, and the longitudinal section of the lower section (42) is shaped like an inverted L. The horizontal end of the lower section (42) is connected to the lower end of the upper section (41), and the vertical section is located outside the upper section (41). The winding shaft (6) is rotatably mounted on the upper section (41), and the horizontal section of the lower section (42) is provided with an opening (10). The extension line (8) passes through the opening (10) and connects to the clamp-on current transformer.

3. The transformer outgoing line power measurement device that is easy to operate according to claim 2, characterized in that, The upper housing (32) is provided with a guide assembly, which includes a guide wheel (9). The guide wheel (9) is rotatably disposed in the space between the lower section (42) of the outer partition (4) and the inner partition (5). The end of the extension line (8) away from the conductive slip ring (7) is wound downward around the guide wheel (9), and then passes upward through the opening (10) of the lower section (42) and is connected to the clamp-on current transformer.

4. The transformer outgoing line power measurement device that is easy to operate according to claim 1, characterized in that, The winding shaft (6) is fixedly fitted with a drive wheel (11) on the inner side of the inner partition (5). The three drive wheels (11) are connected by a belt or chain, and the three winding shafts (6) rotate synchronously in the same direction.

5. The transformer outgoing line power measurement device that is easy to operate according to claim 4, characterized in that, One of the take-up shafts (6) is fixedly fitted with a ratchet (12). A take-up handle (13) is longitudinally slidably provided on the upper part of the upper housing (32). The take-up handle (13) is n-shaped. The horizontal section of the take-up handle (13) is located above the upper housing (32). The two vertical sections of the take-up handle (13) are located on both sides of the ratchet (12) and are respectively provided with a first ratchet bar (14) and a second ratchet bar (15). The upper ends of the first ratchet bar (14) and the second ratchet bar (15) are respectively hinged to the lower ends of the two vertical sections of the take-up handle (13). A torsion spring is provided between the first ratchet bar (14) and the second ratchet bar (15) and the take-up handle (13). The torsion spring drives the first ratchet bar (14) or the second ratchet bar (15) to rotate toward the ratchet (12). When the take-up lever (13) drives the first ratchet (14) and the second ratchet (15) to move downward, the lower end of the first ratchet (14) pushes the ratchet (12) to rotate forward. When the take-up lever (13) drives the first ratchet (14) and the second ratchet (15) to move upward, the lower end of the second ratchet (15) pushes the ratchet (12) to rotate forward.

6. The transformer outgoing line power measurement device that is easy to operate according to claim 5, characterized in that, Limiting rods (16) are provided on the inner sides of both the first ratchet rod (14) and the second ratchet rod (15). When the take-up handle (13) drives the first ratchet bar (14) and the second ratchet bar (15) to move upward until the lower ends of the first ratchet bar (14) and the second ratchet bar (15) disengage from the ratchet wheel (12), the limiting rod (16) of the first ratchet bar (14) and the limiting rod (16) of the second ratchet bar (15) abut against each other. At this time, the lower ends of the first ratchet bar (14) and the lower ends of the second ratchet bar (15) are spaced apart and located on both sides of the axis of the ratchet wheel (12).

7. The transformer outgoing line power measurement device that is easy to operate according to claim 1, characterized in that, The power detection device also includes two sets of fixing components. The two sets of fixing components are located on both sides of the portable shell (3). The fixing components include a fixing strap (17) and a fixing hook (18). One end of the fixing strap (17) is connected to the bottom of the rear end of the upper shell (32), and the other end is connected to the fixing hook (18). The fixing hook (18) is fastened to the bottom of the rear end of the lower shell (31). When the power detection device is fixed to the utility pole (26), the upper housing (32) and the lower housing (31) are opened, so that the rear end face of the upper housing (32) and the end face of the lower housing (31) are attached to the outer circumference of the utility pole (26), and the utility pole (26) is clamped by the fixing strap (17).

8. The transformer outgoing line power measurement device that is easy to operate according to claim 7, characterized in that, The fixing assembly also includes a winding shaft (19), which is rotatably disposed inside the upper housing (32) and located inside the inner partition (5), and the fixing belt (17) is wound and housed in the winding shaft (19).

9. A transformer outgoing line power measurement device that is easy to operate according to claim 8, characterized in that, The winding shaft (19) is a hollow round tube structure. A drive shaft (20) is provided inside the winding shaft (19). A ratchet structure is provided between the drive shaft (20) and the winding shaft (19). The ratchet structure prevents the fixing belt (17) on the winding shaft (19) from being released outward. One end of the drive shaft (20) extends outward from the upper housing (32). The drive shaft (20) is provided with a belt release state and a belt retraction state. When the drive shaft (20) is in the belt release state, the ratchet and tooth structure fails, and the fixed belt (17) can be released outward. When the drive shaft (20) is in the belt retraction state, the ratchet and tooth structure is effective, and the fixed belt (17) cannot be released outward. The drive shaft (20) is axially slidably fitted inside the winding shaft (19). When the drive shaft (20) slides outward, it is in the unwinding state, and when it slides inward, it is in the winding state.

10. A transformer outgoing line power measurement device that is easy to operate according to claim 9, characterized in that, The winding shaft (19) has an inlet section (22) and a ratchet section (23) arranged sequentially from the outside to the inside. The inner diameter of the inlet section (22) is a frustum shape with a larger outer diameter and a smaller inner diameter. The inner wall of the ratchet section (23) is in the shape of a ratchet (12). A pawl (24) is rotatably arranged on the drive shaft (20) by a torsion spring. When the drive shaft (20) is in the unloading state, the pawl (24) is located in the inlet section (22), and when the drive shaft (20) is in the retraction state, the pawl (24) is located in the ratchet section (23).

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