Power cable temperature field distribution measuring device and method

Abstract

The invention discloses a power cable temperature field distribution measuring device and method, and relates to the field of cable temperature field detection. An existing measuring device is inconvenient to measure cable temperature field distribution at different positions. The device comprises a first mounting plate, a second mounting plate and an adjusting assembly, the lower surface of the first mounting plate is movably connected with a measuring assembly, the lower surface of the second mounting plate is movably connected with a fixing assembly, and a moving assembly is fixed in the fixing assembly. The measuring assembly is driven by the moving assembly to move on the surface of the cable, temperature fields of the surface of the cable at different positions are measured, and comprehensive temperature distribution data of the surface of the cable are obtained, so that the temperature abnormal area of the surface of the cable is identified, the possible risk of temperature abnormity is reduced, and the moving assembly can quickly move on the surface of the cable. More measuring points are covered, so that comprehensive temperature data can be obtained in a short time, and the risk of operators is reduced by reducing manual intervention.

Description

Technical Field

[0001] The present invention relates to the technical field of cable temperature field detection, and in particular to a device and method for measuring the temperature field distribution of a power cable. Background Art

[0002] With the development of my country's economy and power industry, the underground cable system of urban distribution network has become an important part of my country's power grid transformation project. Therefore, accurate calculation and timely warning of power cable temperature rise are of great significance to the safe operation of power system. The complex cable structure, improper on-site installation process and the existence of contact resistance increase the possibility of overheating failure, which affects the normal operation of the cable to a certain extent.

[0003] Cables are commonly used in low-voltage distribution lines in three-phase AC power grids and three-phase four-wire systems with neutral point grounding. However, long-term operation in a high temperature environment will accelerate the aging of cable insulation and affect its normal operation. Therefore, it is necessary to accurately calculate the temperature field distribution of the cable, master its temperature development law, and provide timely warnings for excessive temperature rise to avoid safety accidents such as overheating failures and even fires. However, since a power cable has more than one cable joint distributed along its entire length, the working conditions of each joint are different, and the distribution range of the cable is large, the environment in which the cable is located at different positions will also affect the temperature field of the cable. To this end, we provide a power cable temperature field distribution measurement device and method to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to make up for the deficiencies of the prior art and to provide a device and method for measuring the temperature field distribution of a power cable, which solves the problem that the prior measuring device is not convenient for measuring the temperature field distribution of cables at different positions.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a device for measuring the temperature field distribution of a power cable, comprising a first mounting plate and a second mounting plate arranged on the side of the first mounting plate, and also comprising an adjustment component arranged inside the first mounting plate and the second mounting plate, wherein a measuring component is movably connected to the lower surface of the first mounting plate, a fixing component is movably connected to the lower surface of the second mounting plate, a moving component is fixed inside the fixing component, and the second mounting plate and the first mounting plate move on the surface of the cable through the moving component; The measuring component and the fixing component are both fixed to the lower end of the adjusting component, and the measuring component and the fixing component are both fixed to the cable surface through the adjusting component. A fixing block is also fixed to the side of the first mounting plate, and a connecting block is hinged on the surface of the fixing block, and the other end of the connecting block is fixed to the side of the second mounting plate.

[0006] Furthermore, the measuring component includes a movable plate and a first placement groove opened on the surface of the movable plate, a thermocouple is fixed on the inner wall of the first placement groove, a gasket is fixed on the side of the movable plate corresponding to the first placement groove, a detection hole corresponding to the thermocouple is opened on the surface of the gasket, the detection end of the thermocouple is inserted into the detection hole, and the gasket is insulating rubber.

[0007] Furthermore, the fixed component includes a fixed plate and a second placement groove opened inside the fixed plate, a movable component is fixed inside the second placement groove, and the movable component includes a motor fixed to the inner wall of the second placement groove, a first rotating shaft is fixed to the output end of the motor, the other end of the first rotating shaft is rotatably connected to the inner wall of the second placement groove, the inner wall of the second placement groove is also rotatably connected to a second rotating shaft, and rotating rollers are fixed to the surface of the first rotating shaft and the surface of the second rotating shaft.

[0008] Furthermore, the adjustment assembly includes a knob, which is arranged on one side of the first mounting plate, and a bidirectional threaded rod is fixed to the side of the knob. A transmission bin is opened inside the first mounting plate, and the other end of the bidirectional threaded rod is inserted into the transmission bin, and the other end of the bidirectional threaded rod is rotatably connected to the inner wall of the transmission bin, and a threaded cap is threadedly connected to the surface of the bidirectional threaded rod, and a connecting rod is fixed to the lower surface of the threaded cap, and the lower ends of the connecting rod are respectively fixed to the upper surfaces of the movable plate and the fixed plate, and there are two threaded caps and connecting rods, which are symmetrically arranged on the surface of the bidirectional threaded rod.

[0009] Furthermore, the adjustment assembly also includes a ratchet fixed on the surface of the bidirectional threaded rod, a pawl is arranged above the ratchet, a telescopic slot is opened on the surface of the transmission bin, the pawl is hinged to the inner wall of the telescopic slot, a pull rod is hinged on the surface of the pawl, the upper end of the pull rod passes through the telescopic slot, and a spring is sleeved on the surface of the pull rod.

[0010] Furthermore, a first slider is fixed to the upper surface of the movable plate, a first sliding groove corresponding to the first slider is provided on the lower surface of the first mounting plate, the first slider moves in the first sliding groove, the movable plate moves on the lower surface of the first mounting plate through the adjustment component, the first slider and the first sliding groove, a second slider is fixed to the upper surface of the fixed plate, a second sliding groove corresponding to the second slider is provided on the lower surface of the second mounting plate, the second slider moves in the second sliding groove, and the fixed plate moves on the lower surface of the second mounting plate through the adjustment component, the second slider and the second sliding groove.

[0011] Furthermore, the method for using the power cable temperature field distribution measuring device is as follows: First, place the first mounting plate at the designated position, then turn the knob to drive the bidirectional threaded rod to rotate, the bidirectional threaded rod drives the threaded cap to move, the threaded cap drives the connecting rod to move, thereby driving the movable plate fixed at the lower end of the connecting rod to move, when the gasket fixed on the side of the movable plate fits with the cable, stop turning the knob to complete the installation of the measuring component, and during the rotation of the bidirectional threaded rod, drive the ratchet fixed on its surface to rotate, and under the restriction of the pawl, the ratchet can be locked when the ratchet stops rotating to prevent it from reversing; Then, the temperature field of the cable is detected by thermocouples. After the current point detection is completed, it is only necessary to control the operation of the motor. The motor drives the first rotating shaft to rotate, and the first rotating shaft drives the rotating roller fixed on its surface to rotate. Under the action of the friction between the rotating roller and the cable surface, the second mounting plate is driven to move. Due to the spherical hinge of the connecting block and the fixed block, the second mounting plate can drive the first mounting plate to move synchronously during the movement process, thereby driving the measuring component to move on the cable surface for multi-point measurement.

[0012] Compared with the prior art, the power cable temperature field distribution measurement device and method have the following beneficial effects: 1. The present invention drives the measuring component to move on the cable surface through the mobile component, thereby measuring the temperature field on the cable surface at different positions, obtaining comprehensive temperature distribution data on the cable surface, thereby identifying abnormal temperature areas on the cable surface and reducing the possible risks of temperature anomalies. In addition, the mobile component can move quickly on the cable surface to cover more measuring points, thereby obtaining comprehensive temperature data in a short time, reducing labor costs and risks of operators by reducing manual intervention.

[0013] 2. The present invention uses an adjustment component to not only enable the thermocouple to maintain good contact with the cable surface, ensuring accurate temperature readings and reducing measurement errors caused by poor contact, but also prevent the measurement device from shifting due to cable vibration or external force, thereby improving measurement reliability. At the same time, the self-locking of the ratchet pawl also avoids the problem of loose clamping caused by vibration generated during the movement of the adjustment component, further improving measurement reliability.

[0014] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 It is a partial cross-sectional view of the first mounting plate in the present invention.

[0017] Figure 3 For the present invention Figure 2 Schematic diagram of the structure enlarged at point A in the middle.

[0018] Figure 4 It is a detailed structural schematic diagram of the measuring component in the present invention.

[0019] Figure 5 It is a detailed structural schematic diagram of the mobile component in the present invention.

[0020] Figure 6 It is a schematic diagram of the structure after the adjustment component is locked in the present invention.

[0021] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at point B.

[0022] In the figure: 1. First mounting plate; 101. Fixing block; 102. Connecting block; 2. Second mounting plate; 3. Adjustment assembly; 301. Knob; 302. Bidirectional threaded rod; 303. Threaded cap; 304. Connecting rod; 305. Ratchet; 306. Ratchet pawl; 307. Pull rod; 308. Spring; 4. Measuring assembly; 401. movable plate; 402. first slider; 403. first placement slot; 404. gasket; 5. thermocouple; 6. Fixing assembly; 601. Fixing plate; 602. Second sliding block; 603. Second placement slot; 7. Moving assembly; 701. Motor; 702. First rotating shaft; 703. Rotating roller; 704. Second rotating shaft; 8. Transmission compartment. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-7The present invention provides a technical solution: a device for measuring the temperature field distribution of a power cable, comprising a first mounting plate 1 and a second mounting plate 2 arranged on the side of the first mounting plate 1, and also comprising an adjustment component 3 arranged inside the first mounting plate 1 and the second mounting plate 2, a measuring component 4 is movably connected to the lower surface of the first mounting plate 1, a fixing component 6 is movably connected to the lower surface of the second mounting plate 2, a moving component 7 is fixed inside the fixing component 6, and the second mounting plate 2 and the first mounting plate 1 move on the cable surface through the moving component 7.

[0025] The measuring component 4 and the fixing component 6 are both fixed to the lower end of the adjusting component 3, and the measuring component 4 and the fixing component 6 are both fixed to the surface of the cable through the adjusting component 3. A fixing block 101 is also fixed to the side of the first mounting plate 1, and a connecting block 102 is hinged on the surface of the fixing block 101, and the other end of the connecting block 102 is fixed to the side of the second mounting plate 2; the measuring component 4 includes a movable plate 401 and a first placement groove 403 opened on the surface of the movable plate 401, and a thermocouple 5 is fixed to the inner wall of the first placement groove 403. The movable plate 401 is fixed with a gasket 404 on the side corresponding to the first placement groove 403, and a detection hole corresponding to the thermocouple 5 is opened on the surface of the gasket 404. The detection end of the thermocouple 5 is inserted into the detection hole, and the gasket 404 is insulating rubber; the fixing component 6 includes a fixing plate 601 and a second placement groove 603 opened inside the fixing plate 601, and a movable component is fixed inside the second placement groove 603 7. The moving component 7 includes a motor 701 fixed on the inner wall of the second placement groove 603, a first rotating shaft 702 is fixed on the output end of the motor 701, the other end of the first rotating shaft 702 is rotatably connected to the inner wall of the second placement groove 603, the inner wall of the second placement groove 603 is also rotatably connected to the second rotating shaft 704, and rotating rollers 703 are fixed on the surfaces of the first rotating shaft 702 and the second rotating shaft 704; the present invention drives the measuring component 4 to move on the cable surface through the moving component 7, so as to measure the temperature field of the cable surface at different positions, obtain comprehensive temperature distribution data of the cable surface, thereby identifying the temperature abnormal area on the cable surface, reducing the possible risk of temperature abnormality, and the moving component 7 can move quickly on the cable surface to cover more measurement points, so as to obtain comprehensive temperature data in a short time, by reducing manual intervention, reducing labor costs and risks of operators.

[0026] The adjustment component 3 includes a knob 301, which is arranged on one side of the first mounting plate 1, a bidirectional threaded rod 302 is fixed to the side of the knob 301, a transmission compartment 8 is opened inside the first mounting plate 1, the other end of the bidirectional threaded rod 302 is inserted into the transmission compartment 8, and the other end of the bidirectional threaded rod 302 is rotatably connected to the inner wall of the transmission compartment 8, a threaded cap 303 is threadedly connected to the surface of the bidirectional threaded rod 302, a connecting rod 304 is fixed to the lower surface of the threaded cap 303, the lower ends of the connecting rod 304 are respectively fixed to the upper surfaces of the movable plate 401 and the fixed plate 601, and there are two threaded caps 303 and connecting rod 304, which are symmetrically arranged on the surface of the bidirectional threaded rod 302; the adjustment component 3 also includes a ratchet 30 fixed to the surface of the bidirectional threaded rod 302 5. A pawl 306 is arranged above the ratchet 305, and a telescopic groove is opened on the surface of the transmission compartment 8. The pawl 306 is hinged on the inner wall of the telescopic groove, and a pull rod 307 is hinged on the surface of the pawl 306. The upper end of the pull rod 307 passes through the telescopic groove, and a spring 308 is sleeved on the surface of the pull rod 307. The present invention uses the adjustment component 3 to not only enable the thermocouple 5 to maintain good contact with the cable surface to ensure accurate temperature readings and reduce measurement errors caused by poor contact, but also prevent the measurement equipment from shifting due to cable vibration or external force, thereby improving the reliability of measurement. At the same time, the self-locking of the ratchet 305 pawl 306 also avoids the problem of loose clamping caused by the vibration generated during the movement of the adjustment component 3, thereby further improving the reliability of measurement.

[0027] A first slider 402 is fixed on the upper surface of the movable plate 401, a first slide groove corresponding to the first slider 402 is provided on the lower surface of the first mounting plate 1, and the first slider 402 moves in the first slide groove. The movable plate 401 moves on the lower surface of the first mounting plate 1 through the adjustment component 3, the first slider 402 and the first slide groove. A second slider 602 is fixed on the upper surface of the fixed plate 601, a second slide groove corresponding to the second slider 602 is provided on the lower surface of the second mounting plate 2, and the second slider 602 moves in the second slide groove. The fixed plate 601 moves on the lower surface of the second mounting plate 2 through the adjustment component 3, the second slider 602 and the second slide groove; the first slider 402 and the first slide groove, the second slider 602 and the second slide groove can provide support and limit for the movement of the movable plate 401 and the fixed plate 601 respectively.

[0028] The method of using the power cable temperature field distribution measuring device is as follows: first, the device is connected to an external control device, and the control device can be a conventional known device such as a computer for control, and then the staff places the first mounting plate 1 at the specified position, and then the staff turns the knob 301 to drive the bidirectional threaded rod 302 to rotate, the bidirectional threaded rod 302 drives the threaded cap 303 to move, and the threaded cap 303 drives the connecting rod 304 to move, thereby driving the movable plate 401 fixed at the lower end of the connecting rod 304 to move, when the gasket 404 fixed on the side of the movable plate 401 fits with the cable, the knob 301 can be stopped to complete the installation of the measuring component 4, and during the rotation of the bidirectional threaded rod 302, the ratchet 305 fixed on its surface can be driven to rotate, and under the restriction of the pawl 306, the ratchet 305 can be locked when the ratchet 305 stops rotating, and the vibration generated during the movement of the adjustment component 3 causes the clamping looseness problem; repeat the above operation to make the movable component fit tightly with the cable.

[0029] Then the staff detects the temperature field of the cable through the thermocouple 5. After the current point detection is completed, the staff only needs to control the operation of the motor 701. The motor 701 drives the first rotating shaft 702 to rotate. The first rotating shaft 702 drives the rotating roller 703 fixed on its surface to rotate. Under the action of the friction between the rotating roller 703 and the cable surface, the second mounting plate 2 is driven to move. Due to the spherical hinge of the connecting block 102 and the fixed block 101, the second mounting plate 2 can drive the first mounting plate 1 to move synchronously during the movement, thereby driving the measuring component 4 to move on the cable surface for multi-point measurement.

[0030] Finally, when the staff needs to make a reverse adjustment to the adjustment component 3, the staff only needs to pull the pull rod 307 upwards to first drive the pawl 306 to move upwards, so that the pawl 306 is separated from the ratchet 305, and then the knob 301 can be turned in the reverse direction to drive the two-way threaded rod 302 to rotate, thereby causing the threaded cap 303 and the connecting rod 304 to move in the reverse direction. After the adjustment is completed, the staff releases the pull rod 307, and under the rebound force of the spring 308, the pawl 306 locks the ratchet 305 again.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A device for measuring the temperature field distribution of a power cable, comprising a first mounting plate (1) and a second mounting plate (2) arranged on the side of the first mounting plate (1), characterized in that: It also includes an adjustment component (3) disposed inside the first mounting plate (1) and the second mounting plate (2); a measuring component (4) is movably connected to the lower surface of the first mounting plate (1); a fixing component (6) is movably connected to the lower surface of the second mounting plate (2); a moving component (7) is fixed inside the fixing component (6); and the second mounting plate (2) and the first mounting plate (1) move on the surface of the cable via the moving component (7); The measuring component (4) and the fixing component (6) are both fixed to the lower end of the adjusting component (3); the measuring component (4) and the fixing component (6) are both fixed to the surface of the cable via the adjusting component (3); a fixing block (101) is also fixed to the side of the first mounting plate (1); a connecting block (102) is hingedly connected to the surface of the fixing block (101); the other end of the connecting block (102) is fixed to the side of the second mounting plate (2).

2. A power cable temperature field distribution measuring device according to claim 1, characterized in that: The measuring component (4) comprises a movable plate (401) and a first placement groove (403) provided on the surface of the movable plate (401); a thermocouple (5) is fixed to the inner wall of the first placement groove (403); a gasket (404) is fixed to the side of the movable plate (401) corresponding to the first placement groove (403); a detection hole corresponding to the thermocouple (5) is provided on the surface of the gasket (404); and a detection end of the thermocouple (5) is inserted into the detection hole.

3. A power cable temperature field distribution measuring device according to claim 2, characterized in that: The fixing component (6) comprises a fixing plate (601) and a second placement groove (603) provided inside the fixing plate (601); a moving component (7) is fixed inside the second placement groove (603); the moving component (7) comprises a motor (701) fixed to the inner wall of the second placement groove (603); a first rotating shaft (702) is fixed to the output end of the motor (701); the other end of the first rotating shaft (702) is rotatably connected to the inner wall of the second placement groove (603); the inner wall of the second placement groove (603) is also rotatably connected to a second rotating shaft (704); rotating rollers (703) are fixed to the surfaces of the first rotating shaft (702) and the second rotating shaft (704).

4. A power cable temperature field distribution measuring device according to claim 3, characterized in that: The adjustment assembly (3) comprises a knob (301), the knob (301) being arranged on one side of a first mounting plate (1), a bidirectional threaded rod (302) being fixed to the side of the knob (301), a transmission bin (8) being provided inside the first mounting plate (1), the other end of the bidirectional threaded rod (302) being inserted into the transmission bin (8), and the other end of the bidirectional threaded rod (302) being rotatably connected to the inner wall of the transmission bin (8), a threaded cap (303) being threadedly connected to the surface of the bidirectional threaded rod (302), a connecting rod (304) being fixed to the lower surface of the threaded cap (303), the lower ends of the connecting rod (304) being respectively fixed to the upper surfaces of the movable plate (401) and the fixed plate (601), and two of each of the threaded cap (303) and the connecting rod (304) being symmetrically arranged on the surface of the bidirectional threaded rod (302).

5. A power cable temperature field distribution measuring device according to claim 4, characterized in that: The adjustment assembly (3) further comprises a ratchet (305) fixed on the surface of the bidirectional threaded rod (302), a pawl (306) being arranged above the ratchet (305), a telescopic slot being opened on the surface of the transmission bin (8), the pawl (306) being hinged on the inner wall of the telescopic slot, a pull rod (307) being hinged on the surface of the pawl (306), the upper end of the pull rod (307) passing through the telescopic slot, and a spring (308) being sleeved on the surface of the pull rod (307).

6. A power cable temperature field distribution measuring device according to claim 5, characterized in that: A first slider (402) is fixed on the upper surface of the movable plate (401); a first slide groove corresponding to the first slider (402) is provided on the lower surface of the first mounting plate (1); the first slider (402) moves in the first slide groove; the movable plate (401) moves on the lower surface of the first mounting plate (1) through the adjustment component (3), the first slider (402) and the first slide groove; a second slider (602) is fixed on the upper surface of the fixed plate (601); a second slide groove corresponding to the second slider (602) is provided on the lower surface of the second mounting plate (2); the second slider (602) moves in the second slide groove; the fixed plate (601) moves on the lower surface of the second mounting plate (2) through the adjustment component (3), the second slider (602) and the second slide groove.

7. A power cable temperature field distribution measuring device according to claim 6, characterized in that: The method of using the power cable temperature field distribution measuring device is as follows: First, the first mounting plate (1) is placed at a designated position, and then the knob (301) is turned to drive the bidirectional threaded rod (302) to rotate, the bidirectional threaded rod (302) drives the threaded cap (303) to move, the threaded cap (303) drives the connecting rod (304) to move, thereby driving the movable plate (401) fixed at the lower end of the connecting rod (304) to move, and when the gasket (404) fixed on the side of the movable plate (401) fits with the cable, the knob (301) can be stopped from being turned to complete the installation of the measuring component (4), and during the rotation of the bidirectional threaded rod (302), the ratchet (305) fixed on its surface is driven to rotate, and under the restriction of the pawl (306), the ratchet (305) can be locked when the ratchet (305) stops rotating to prevent it from reversing; Then, the temperature field of the cable is detected by the thermocouple (5). After the current point detection is completed, it is only necessary to control the motor (701) to operate. The motor (701) drives the first rotating shaft (702) to rotate. The first rotating shaft (702) drives the rotating roller (703) fixed on its surface to rotate. Under the action of the friction between the rotating roller (703) and the cable surface, the second mounting plate (2) is driven to move. Due to the spherical hinge between the connecting block (102) and the fixed block (101), the second mounting plate (2) can drive the first mounting plate (1) to move synchronously during the movement process, thereby driving the measuring component (4) to move on the cable surface to perform multi-point measurement.

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