A device and method for measuring the temperature field distribution of power cables

Abstract

This invention discloses a device and method for measuring the temperature field distribution of power cables, relating to the field of cable temperature field detection. Existing measuring devices are inconvenient for measuring the temperature field distribution of cables at different locations. This invention includes a first mounting plate, a second mounting plate, and an adjustment assembly. A measuring assembly is movably connected to the lower surface of the first mounting plate, and a fixed assembly is movably connected to the lower surface of the second mounting plate. A moving assembly is fixed inside the fixed assembly. This invention uses the moving assembly to move the measuring assembly across the cable surface, measuring the temperature field at different locations on the cable surface, obtaining comprehensive temperature distribution data of the cable surface, thereby identifying temperature anomaly areas on the cable surface, reducing the potential risks of temperature anomalies, and enabling the moving assembly to move quickly across the cable surface, covering more measurement points, thus obtaining comprehensive temperature data in a short time. By reducing manual intervention, the risk to operators is reduced.

Description

Technical Field

[0001] This invention relates to the field of cable temperature field detection technology, specifically to a device and method for measuring the temperature field distribution of power cables. Background Technology

[0002] With the development of my country's economy and power industry, underground cable systems in urban power distribution networks have become an important part of my country's power grid renovation projects. Therefore, accurate calculation and timely early warning of power cable temperature rise are of great significance for the safe operation of the power system. The complex structure of cables, improper on-site installation techniques, and the presence of contact resistance increase the possibility of overheating faults, which to some extent affects the normal operation of cables.

[0003] Cables are commonly used in low-voltage distribution lines of three-phase AC power grids and in three-phase four-wire systems with neutral grounding. However, prolonged operation in high-temperature environments accelerates cable insulation aging, affecting normal operation. Therefore, it is necessary to accurately calculate the cable temperature field distribution, understand its temperature development patterns, and provide timely warnings of excessive temperature rise to prevent overheating faults or even fires. However, because a power cable has multiple joints along its length, each with different operating conditions, and because the cable's distribution range is large, the environment at different locations also affects the cable's temperature field. To address these issues, we provide a power cable temperature field distribution measurement device and method. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a power cable temperature field distribution measurement device and method, which solves the problem that existing measurement devices are not convenient for measuring the cable temperature field distribution at different locations.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a power cable temperature field distribution measuring device, comprising a first mounting plate and a second mounting plate disposed on the side of the first mounting plate, and further comprising an adjustment component disposed 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 cable surface through the moving component;

[0006] Both the measuring component and the fixing component are fixed to the lower end of the adjusting component. Both the measuring component and the fixing component are fixed to the cable surface through the adjusting component. A fixing block is also fixed to the side of the first mounting plate. A connecting block is hinged to the surface of the fixing block. The other end of the connecting block is fixed to the side of the second mounting plate.

[0007] Furthermore, the measuring component includes a movable plate and a first placement groove formed on the surface of the movable plate. A thermocouple is fixed to the inner wall of the first placement groove. A gasket is fixed to the side of the movable plate corresponding to the first placement groove. A detection hole corresponding to the thermocouple is formed on the surface of the gasket. The detection end of the thermocouple passes through the detection hole. The gasket is made of insulating rubber.

[0008] Furthermore, the fixing component includes a fixing plate and a second placement slot opened inside the fixing plate. A moving component is fixed inside the second placement slot. The moving component includes a motor fixed to the inner wall of the second placement slot. 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 slot. A second rotating shaft is also rotatably connected to the inner wall of the second placement slot. Rotating rollers are fixed to the surfaces of the first rotating shaft and the second rotating shaft.

[0009] Furthermore, the adjustment assembly includes a knob disposed on one side of the first mounting plate. A bidirectional threaded rod is fixed to the side of the knob. A transmission chamber is provided inside the first mounting plate. The other end of the bidirectional threaded rod passes through the transmission chamber and is rotatably connected to the inner wall of the transmission chamber. A threaded cap is threadedly connected to the surface of the bidirectional threaded rod. A connecting rod is fixed to the lower surface of the threaded cap. The lower end of the connecting rod is fixed to the upper surface of the movable plate and the fixed plate, respectively. There are two threaded caps and two connecting rods, which are symmetrically arranged on the surface of the bidirectional threaded rod.

[0010] Furthermore, the adjustment assembly also includes a ratchet fixed to the surface of the bidirectional threaded rod, a pawl is provided above the ratchet, a telescopic groove is provided on the surface of the transmission chamber, the pawl is hinged to the inner wall of the telescopic groove, a pull rod is hinged to the surface of the pawl, the upper end of the pull rod passes through the telescopic groove, and a spring is sleeved on the surface of the pull rod.

[0011] Furthermore, a first slider is fixed to the upper surface of the movable plate, and a first groove corresponding to the first slider is formed on the lower surface of the first mounting plate. The first slider moves in the first groove. The movable plate moves on the lower surface of the first mounting plate through the adjusting component, the first slider, and the first groove. A second slider is fixed to the upper surface of the fixed plate, and a second groove corresponding to the second slider is formed on the lower surface of the second mounting plate. The second slider moves in the second groove. The fixed plate moves on the lower surface of the second mounting plate through the adjusting component, the second slider, and the second groove.

[0012] Furthermore, the method of using this power cable temperature field distribution measuring device is as follows:

[0013] First, place the first mounting plate in the designated position. Then, turn the knob to rotate the bidirectional threaded rod. The bidirectional threaded rod moves the threaded cap, which in turn moves the connecting rod, thereby moving the movable plate fixed at the lower end of the connecting rod. When the gasket fixed on the side of the movable plate is in contact with the cable, you can stop turning the knob to complete the installation of the measuring component. During the rotation of the bidirectional threaded rod, the ratchet fixed on its surface rotates. Under the restriction of the pawl, the ratchet can be locked when it stops rotating to prevent it from reversing.

[0014] Then, the temperature field of the cable is detected by thermocouples. After the current point is detected, it is only necessary to control the motor to operate. 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 friction between the rotating roller and the cable surface, the second mounting plate can be moved. 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 of the second mounting plate, thereby driving the measuring component to move on the cable surface to perform multi-point measurement.

[0015] Compared with existing technologies, the power cable temperature field distribution measurement device and method have the following advantages:

[0016] I. This invention uses a moving component to move a measuring component across the cable surface, thereby measuring the temperature field at different locations on the cable surface and obtaining comprehensive temperature distribution data. This allows for the identification of temperature anomaly areas on the cable surface, reducing the potential risks associated with temperature anomalies. Furthermore, the moving component can move rapidly across the cable surface, covering more measurement points, thus obtaining comprehensive temperature data in a short time. By reducing manual intervention, it lowers labor costs and the risks to operators.

[0017] Second, by adjusting the components, this invention not only ensures that the thermocouple maintains good contact with the cable surface, thus ensuring accurate temperature readings and reducing measurement errors caused by poor contact, but also prevents the measuring equipment from shifting due to cable vibration or external forces, thereby improving the reliability of the measurement. At the same time, the self-locking of the ratchet and pawl also avoids the problem of loosening of the clamping due to vibration generated during the movement of the adjustment components, further improving the reliability of the measurement.

[0018] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a partial cross-sectional view of the first mounting plate in this invention.

[0021] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0022] Figure 4 This is a detailed structural diagram of the measuring component in this invention.

[0023] Figure 5 This is a detailed structural diagram of the moving component in this invention.

[0024] Figure 6 This is a schematic diagram of the structure after the adjustment component is locked in this invention.

[0025] Figure 7 In this invention Figure 6 Enlarged structural diagram at point B.

[0026] In the picture:

[0027] 1. First mounting plate; 101. Fixing block; 102. Connecting block; 2. Second mounting plate;

[0028] 3. Adjustment components; 301. Knob; 302. Two-way threaded rod; 303. Threaded cap; 304. Connecting rod; 305. Ratchet; 306. Pad; 307. Pull rod; 308. Spring;

[0029] 4. Measuring assembly; 401. Movable plate; 402. First slider; 403. First placement slot; 404. Gasket; 5. Thermocouple;

[0030] 6. Fixing component; 601. Fixing plate; 602. Second slider; 603. Second placement slot;

[0031] 7. Moving component; 701. Motor; 702. First rotating shaft; 703. Rotating roller; 704. Second rotating shaft;

[0032] 8. Transmission compartment. Detailed Implementation

[0033] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1-7The present invention provides a technical solution: a power cable temperature field distribution measuring device, including a first mounting plate 1 and a second mounting plate 2 disposed on the side of the first mounting plate 1, and further including 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, and 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. The second mounting plate 2 and the first mounting plate 1 move on the cable surface through the moving component 7.

[0035] Both the measuring component 4 and the fixing component 6 are fixed to the lower end of the adjusting component 3. Both the measuring component 4 and the fixing component 6 are fixed to the cable surface through 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 hinged 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. The measuring component 4 includes a movable plate 401 and a first placement groove 403 opened 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 opened on the surface of the gasket 404. The detection end of the thermocouple 5 passes through the detection hole. The gasket 404 is made of insulating rubber. The fixing component 6 includes a fixing plate 601 and a second placement groove 603 opened inside the fixing plate 601. A moving component is fixed inside the second placement groove 603. 7. The moving component 7 includes a motor 701 fixed to the inner wall of the second placement groove 603. The output end of the motor 701 is fixed to a first rotating shaft 702. The other end of the first rotating shaft 702 is rotatably connected to the inner wall of the second placement groove 603. A second rotating shaft 704 is also rotatably connected to the inner wall of the second placement groove 603. Rotating rollers 703 are fixed to the surfaces of the first rotating shaft 702 and the second rotating shaft 704. The present invention uses the moving component 7 to drive the measuring component 4 to move on the cable surface, thereby measuring the temperature field of the cable surface at different locations, obtaining comprehensive temperature distribution data of the cable surface, thereby identifying temperature abnormal areas on the cable surface, reducing the risk of possible temperature abnormalities, and the moving component 7 can move quickly on the cable surface to cover more measurement points, thereby obtaining comprehensive temperature data in a short time. By reducing manual intervention, it reduces labor costs and operator risks.

[0036] Adjustment assembly 3 includes a knob 301, which is located 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 chamber 8 is provided inside the first mounting plate 1. The other end of the bidirectional threaded rod 302 passes through the transmission chamber 8 and is rotatably connected to the inner wall of the transmission chamber 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 rods 304 are respectively fixed to the upper surfaces of the movable plate 401 and the fixed plate 601. There are two threaded caps 303 and two connecting rods 304, which are symmetrically arranged on the surface of the bidirectional threaded rod 302. Adjustment assembly 3 also includes a ratchet 30 fixed to the surface of the bidirectional threaded rod 302. 5. A pawl 306 is provided above the ratchet 305. A telescopic groove is opened on the surface of the transmission chamber 8. The pawl 306 is hinged to the inner wall of the telescopic groove. A pull rod 307 is hinged to the surface of the pawl 306. The upper end of the pull rod 307 passes through the telescopic groove. A spring 308 is sleeved on the surface of the pull rod 307. The present invention, through the adjustment component 3, not only enables the thermocouple 5 to maintain good contact with the cable surface, ensuring accurate temperature readings and reducing measurement errors caused by poor contact, but also prevents the measuring 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 and the pawl 306 also avoids the problem of loosening of the clamping caused by the vibration generated during the movement of the adjustment component 3, further improving the reliability of measurement.

[0037] A first slider 402 is fixed to the upper surface of the movable plate 401. A first groove corresponding to the first slider 402 is formed on the lower surface of the first mounting plate 1. The first slider 402 moves in the first groove. The movable plate 401 moves on the lower surface of the first mounting plate 1 through the adjusting component 3, the first slider 402 and the first groove. A second slider 602 is fixed to the upper surface of the fixed plate 601. A second groove corresponding to the second slider 602 is formed on the lower surface of the second mounting plate 2. The second slider 602 moves in the second groove. The fixed plate 601 moves on the lower surface of the second mounting plate 2 through the adjusting component 3, the second slider 602 and the second groove. The first slider 402 and the first groove, the second slider 602 and the second groove can provide support and limit the movement of the movable plate 401 and the fixed plate 601 respectively.

[0038] The method of using the power cable temperature field distribution measuring device is as follows: First, connect the device to an external control device, which can be a conventional known device such as a computer. Then, the operator places the first mounting plate 1 in the designated position. Subsequently, the operator 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 is in contact with the cable, the knob 301 can be stopped, completing the installation of the measuring component 4. During the rotation of the bidirectional threaded rod 302, the ratchet 305 fixed on its surface can be driven to rotate. Under the restriction of the pawl 306, the ratchet 305 can be locked when it stops rotating, adjusting the component 3 to prevent the clamping from loosening due to vibration generated during the movement. Repeat the above operation to make the movable component fit tightly with the cable.

[0039] Then, the staff uses thermocouple 5 to detect the temperature field of the cable. After the current point is detected, the staff only needs to control the operation of motor 701. 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 friction between the rotating roller 703 and the cable surface, the second mounting plate 2 can be moved. Due to the spherical hinge of connecting block 102 and fixing 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.

[0040] Finally, when the operator needs to reverse the adjustment of the adjustment component 3, the operator only needs to pull the lever 307 upward, which will first drive the pawl 306 upward, so that the pawl 306 separates from the ratchet 305. Then, the knob 301 can be turned in the opposite direction, which will drive the bidirectional threaded rod 302 to rotate, thereby causing the threaded cap 303 and the connecting rod 304 to move in the opposite direction. After the adjustment is completed, the operator releases the lever 307. Under the rebound force of the spring 308, the pawl 306 locks the ratchet 305 again.

[0041] 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 invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A power cable temperature field distribution measuring device, comprising a first mounting plate (1) and a second mounting plate (2) disposed 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), and 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). The second mounting plate (2) and the first mounting plate (1) move on the cable surface through the moving component (7). The measuring component (4) and the fixing component (6) are both fixed at the lower end of the adjusting component (3). The measuring component (4) and the fixing component (6) are both fixed to the cable surface through the adjusting component (3). A fixing block (101) is also fixed on the side of the first mounting plate (1). A connecting block (102) is hinged 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). The adjustment component (3) includes a knob (301), which is located 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 chamber (8) is provided inside the first mounting plate (1). The other end of the bidirectional threaded rod (302) passes through the transmission chamber (8) and is rotatably connected to the inner wall of the transmission chamber (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 end of the connecting rod (304) is fixed to the upper surface of the movable plate (401) and the fixed plate (601) respectively. There are two threaded caps (303) and two connecting rods (304), which are symmetrically arranged on the surface of the bidirectional threaded rod (302). The adjustment assembly (3) also includes a ratchet (305) fixed on the surface of the bidirectional threaded rod (302). A pawl (306) is provided above the ratchet (305). A telescopic groove is provided on the surface of the transmission chamber (8). The pawl (306) is hinged to the inner wall of the telescopic groove. A pull rod (307) is hinged to the surface of the pawl (306). The upper end of the pull rod (307) passes through the telescopic groove. A spring (308) is sleeved on the surface of the pull rod (307).

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

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

4. The power cable temperature field distribution measuring device according to claim 1, characterized in that: The upper surface of the movable plate (401) is fixed with a first slider (402), and the lower surface of the first mounting plate (1) is provided with a first groove corresponding to the first slider (402). The first slider (402) moves in the first 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 groove. The upper surface of the fixed plate (601) is fixed with a second slider (602), and the lower surface of the second mounting plate (2) is provided with a second groove corresponding to the second slider (602). The second slider (602) moves in the second 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 groove.

5. The power cable temperature field distribution measuring device according to claim 3, characterized in that, The method of using this power cable temperature field distribution measuring device is as follows: First, place the first mounting plate (1) in the designated position, then turn the knob (301) 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. When the gasket (404) fixed on the side of the movable plate (401) is in contact with the cable, the knob (301) can be stopped to complete the installation of the measuring component (4). During the rotation of the bidirectional threaded rod (302), the ratchet (305) fixed on its surface is driven to rotate. Under the restriction of the pawl (306), the ratchet (305) can be locked when it stops rotating to prevent it from reversing. Then, the temperature field of the cable is detected by thermocouple (5). After the current point detection is completed, it is only necessary to control the operation of motor (701). 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 friction between the rotating roller (703) and the cable surface, the second mounting plate (2) can be moved. 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 of the second mounting plate (2), thereby driving the measuring component (4) to move on the cable surface for multi-point measurement.

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