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CN-121027664-B - Cable on-line monitoring device based on temperature sensor

CN121027664BCN 121027664 BCN121027664 BCN 121027664BCN-121027664-B

Abstract

The invention relates to the technical field of temperature measurement, in particular to a cable on-line monitoring device based on a temperature sensor, which comprises a connecting pipe and cable heads to be butted at two ends of the connecting pipe, and is characterized in that an annular heat conduction loop is arranged in the pipe wall of the connecting pipe, a containing part is arranged in the middle of the connecting pipe, a storage component for flowing out heat conduction liquid gold through butt joint extrusion of the cable heads is arranged in the containing part, and the heat conduction loop and the containing part form a heat conduction flow channel together; the installation cover is arranged at the center of the connecting pipe and is communicated with the heat conducting loop, the temperature sensor body is arranged on the installation cover, the detection end of the temperature sensor body is arranged at the communication position of the heat conducting loop and the containing part through elastic expansion, a control component which controls the expansion of the detection end through liquid gold temperature rising expansion is arranged in the installation cover, and the annular heat conducting flow channel and the center containing part are arranged in the connecting pipe and are filled with heat conducting liquid gold, so that the rapid response and the accurate measurement of the abnormal temperature rising inside the joint are realized.

Inventors

  • CHANG XUDONG
  • YUAN YING
  • LIU JIAJIA
  • LEI XIANYONG
  • LI YONGCAI
  • TIAN ZHONGMI
  • HAO PENGJU

Assignees

  • 南京南电继保自动化有限公司

Dates

Publication Date
20260512
Application Date
20250829

Claims (10)

  1. 1. The cable on-line monitoring device based on the temperature sensor comprises a connecting pipe (1) and cable heads to be butted at two ends of the connecting pipe (1), and is characterized in that an annular heat conduction loop (7) is arranged in the pipe wall of the connecting pipe (1), a containing part (5) is arranged in the middle of the connecting pipe (1), a storage component (6) for flowing out heat conduction liquid gold through butt joint extrusion of the cable heads is arranged in the containing part (5), and the heat conduction loop (7) and the containing part (5) form a heat conduction flow channel together; Wherein, the central point of connecting pipe (1) puts and is provided with installing cover (10) with heat conduction ring channel (7) intercommunication, is provided with temperature sensor body (3) on installing cover (10), and the detection end of temperature sensor body (3) is through flexible setting and heat conduction ring channel (7) and the intercommunication department of holding portion (5), is provided with in installing cover (10) and controls the flexible control assembly of detection end through liquid gold rising temperature expansion.
  2. 2. The on-line monitoring device for the cable based on the temperature sensor according to claim 1, wherein the two ends of the butt joint of the connecting pipe (1) are symmetrically provided with fastening bolts (2) in a disassembling mode, and the fastening bolts (2) are used for fixing a cable core.
  3. 3. The on-line monitoring device for the cable based on the temperature sensor according to claim 1, wherein the connecting components (4) are symmetrically arranged at two ends in the connecting pipe (1), the connecting components (4) comprise a connecting cover (43) sliding in the connecting pipe (1), two sliding grooves (41) are symmetrically arranged in the axial direction in the pipe wall of the connecting pipe (1), a sliding block (42) is actively arranged in the sliding groove (41), a reset spring (44) is arranged in the sliding groove (41), the sliding block (42) is connected in the sliding groove (41) in a sliding mode through the reset spring (44), and the sliding block (42) is fixedly connected on the connecting cover (43).
  4. 4. The on-line monitoring device for a cable based on a temperature sensor according to claim 3, wherein the opposite sides of the two connecting covers (43) are provided with grooves for clamping the cable core heads.
  5. 5. The on-line monitoring device for the cable based on the temperature sensor according to claim 4, wherein the accommodating part (5) comprises deformation plates (51) which are arranged on two sides of the inner center of the connecting pipe (1) in a sealing manner, the deformation plates (51) are attached to the connecting covers (43) on the same side correspondingly, a cylindrical storage cavity (52) is formed between the two deformation plates (51), and the storage cavity (52) is communicated with the heat conducting ring channel (7).
  6. 6. The on-line monitoring device for cables based on temperature sensors according to claim 5, wherein the deformable plate (51) is made of deformable material, and in an initial state, the deformable plate (51) has a convex structure compared with the center of the connecting pipe (1).
  7. 7. The on-line cable monitoring device based on the temperature sensor according to claim 6, wherein the storage component (6) comprises deformation bags (61) with two sides being attached to corresponding deformation plates (51) and being matched with each other in structure, a protective film (62) is arranged between the two deformation bags (61), the two deformation bags (61) form a sealing structure through the protective film (62), and the deformation bags (61) and the protective film (62) are filled with heat-conducting liquid gold.
  8. 8. The on-line cable monitoring device based on the temperature sensor according to claim 1, wherein a sealing cover (11) is fixedly arranged at the top end of the installation cover (10) positioned outside the connecting pipe (1), a measuring component (9) is arranged at the top end of the sealing cover (11), and the temperature sensor body (3) measures the temperature of the heat conduction liquid gold in the heat conduction flow channel through the measuring component (9); the measuring assembly (9) comprises a mounting pipe (91), one end of the mounting pipe (91) is detachably connected with the top end of the sealing cover (11), the other end of the sealing cover (11) is connected with the temperature sensor body (3), a conducting wire (92) is arranged in the mounting pipe (91) in a telescopic manner, one end of the conducting wire (92) is electrically connected with the temperature sensor body (3), the other end of the temperature sensor body (3) extends into the heat conducting ring channel (7), and a detection pipe (93) is sleeved on one end of the conducting wire (92) located in the mounting cover (10); A through hole is formed in the center of the top end of the mounting cover (10), a deformation ball (96) is arranged in the through hole, the deformation ball (96) is sleeved on a detection tube (93), and the detection tube (93) and the through hole form a sealing structure through the deformation ball (96); in an initial state, one end of the detection tube (93) extends into the sealing cover (11), a tension spring (95) is arranged in the sealing cover (11), and the detection tube (93) is connected with the top end of the sealing cover (11) through the tension spring (95).
  9. 9. The on-line cable monitoring device based on the temperature sensor according to claim 8, wherein the control assembly comprises a pressing plate (12) which is symmetrically arranged relative to the detection tube (93) in the installation cover (10), the pressing plate (12) is of an S-shaped seesaw structure, one end of the pressing plate (12) is movably connected with the detection tube (93), a supporting rod (13) is rotatably connected to a turning position at the top of the pressing plate (12), and the supporting rod (13) is fixedly arranged in the installation cover (10); the control assembly further comprises a trigger assembly (14) arranged at the bottom of the installation cover (10), the trigger assembly (14) comprises a telescopic deformation cover (141), the deformation cover (141) is fixedly arranged at the bottom of the installation cover (10), the periphery of the deformation cover (141) is in sealing fit with the inner wall of the installation cover (10), a first buoyancy disc (142) is fixedly arranged at the bottom of the deformation cover (141), the bottom of the first buoyancy disc (142) is positioned in the heat conducting ring (7), a second buoyancy disc (143) is fixedly arranged at the bottom of the first buoyancy disc (142), the second buoyancy disc (143) is positioned above the communication position of the heat conducting ring (7) and the accommodating part (5), the diameter of the second buoyancy disc (143) is smaller than that of the first buoyancy disc (142), sliding cavities (144) are formed in the central positions of the first buoyancy disc (142) and the second buoyancy disc (143), the detection tube (93) is slidably connected in the sliding cavities (144), the bottom of the detection tube (93) is provided with a temperature detector head (94), and the temperature detector head (92) is far away from one end of the electric sensor (3); The bottom turning part of the pressing plate (12) is attached to the top of the first buoyancy disc (142); In an initial state, when the heat conduction liquid gold is positioned in the heat conduction flow channel, the detection head (94) is positioned in the sliding cavity (144), and the heat conduction liquid gold is not contacted with the detection head (94); when the cable core joint is in fault and temperature rise, the detection head (94) is positioned outside the sliding cavity (144), and the heat conduction liquid gold is in contact with the detection head (94).
  10. 10. The on-line monitoring device for the cable based on the temperature sensor according to claim 9, wherein deformation rings (8) are arranged in the two side end parts of the heat conduction ring channel (7), the deformation rings (8) and the deformation balls (96) are made of elastic materials, and the inside of the deformation rings is filled with temperature sensitive gas.

Description

Cable on-line monitoring device based on temperature sensor Technical Field The invention relates to the technical field of temperature measurement, in particular to a cable on-line monitoring device based on a temperature sensor. Background The cable on-line monitoring device is an important device for monitoring the running state of the power cable in real time, is important for ensuring the safe and stable running of the power system, and mainly monitors the temperature change of the surface or the joint of the cable by means of a temperature sensor. Once the temperature is outside of the normal range, it may mean that there is an overload, partial discharge, or other potential failure of the cable. The temperature data is transmitted to a monitoring center in a wired or wireless mode for analysis and processing by technicians. In the prior art, a mode of winding a temperature sensor detecting rope around a protective sleeve on an outer layer of a cable is generally adopted for temperature monitoring of a cable joint part. However, when an abnormal temperature rise occurs inside the cable terminal, heat needs to be conducted to the external sensor through the insulating layer and the protective layer, and obvious heat conduction hysteresis exists in the process, so that temperature feedback is delayed. Because the monitoring system cannot timely sense the internal fault temperature change, the optimal early warning time is easy to miss, so that the risk of thermal faults of the wiring terminal or the terminal equipment is increased, and the safe operation and reliability of the system are affected. Based on the above, the invention discloses a cable on-line monitoring device based on a temperature sensor. Disclosure of Invention In order to solve the problems that in the prior art, when abnormal temperature rise occurs in the inside of a wiring terminal in a mode that a temperature sensor detection rope is wound on a cable outer protective sleeve, temperature feedback is delayed and early warning is difficult to perform in time, and the risk of thermal faults of the wiring terminal or the terminal is increased, the invention provides a cable on-line monitoring device based on a temperature sensor, which comprises a connecting pipe and cable heads to be butted at two ends of the connecting pipe, wherein fastening bolts are symmetrically arranged at two butted ends of the connecting pipe in a disassembling mode, and are used for fixing a cable core; Because traditional carry out temperature measurement to cable joint department, often twine the outer protective sheath of cable junction department through the detection rope of temperature sensor body and measure, but because the heat conduction route is longer, cause the conduction hysteresis, annular heat conduction ring way has been seted up in this technical scheme adopts the connecting pipe wall, is provided with the holding part in the middle of the connecting pipe, is provided with the storage component who flows heat conduction liquid gold through cable head butt joint extrusion in the holding part, and heat conduction ring way and holding part form the heat conduction runner jointly. Because the butt joint of the cable core heads is usually realized by means of electric conduction after the fastening bolts are fastened, secondly, the extrusion of the accommodating part and the storage component is realized by the butt joint extrusion of the cable core heads, so that the heat conduction liquid gold flows out, but because the vicinity of the cable core heads is usually provided with sharp parts, the damage of the accommodating part and the storage component is easy to cause, if the joint is movable in the later stage, the damage of the heat conduction liquid gold sealing part of the joint is easier to cause, so that the heat conduction liquid gold flows out, and the temperature measurement of the joint in the later stage can be influenced; as a further improvement of the technical scheme, connecting components are symmetrically arranged at two ends in the connecting pipe, the connecting components comprise connecting covers sliding in the connecting pipe, two sliding grooves are symmetrically formed in the inner portion of the pipe wall of the connecting pipe in the axial direction of the connecting cover, sliding blocks are actively arranged in the sliding grooves, reset springs are arranged in the sliding grooves, the sliding blocks are slidably connected in the sliding grooves through the reset springs, the sliding blocks are fixedly connected to the connecting covers, and secondly, grooves for clamping cable core heads are formed in one sides of the two opposite connecting covers. On the basis, because the fluidity of the heat conduction liquid gold is larger, in order to ensure the stability of the heat conduction liquid gold in the storage component during installation, the heat conduction liquid gold can be ensured to flow out from the storage