Cable fault intelligent monitoring and positioning device

Abstract

The invention discloses a cable fault intelligent monitoring and positioning device, and relates to the technical field of power equipment, the cable fault intelligent monitoring and positioning device comprises a shell which sleeves a cable, the shell comprises a shell I and a shell II, one side of the shell I is hinged with the shell II through a hinge shaft, one side of the shell II far away from the hinge shaft is provided with a buckle, and the buckle is connected with the shell II through the hinge shaft. The first shell and the second shell are installed on a node to be tested of a cable through the buckles. The electric control box is fixed on the shell I; the clamping assembly is mounted in the shell I and the shell II; wherein the clamping assemblies comprise the first clamping assemblies and the second clamping assemblies, the number of the first clamping assemblies is two, the first clamping assemblies are symmetrically arranged in the middle positions of the first shell and the second shell, and the second clamping assemblies are symmetrically arranged on the two sides of the first clamping assemblies and located at the edge positions of the first shell and the second shell.

Description

Technical Field

[0001] This invention relates to the field of power equipment monitoring technology, specifically to an intelligent monitoring and location device for cable faults. Background Technology

[0002] Power cables are the lifeline for power transmission in smart grids and important industrial facilities, and their operational reliability is of paramount importance. During long-term operation, cables may fail due to external damage, insulation aging, local overheating, and other reasons. In existing technologies, cable fault monitoring methods based on vibration signal analysis (such as distributed acoustic sensing (DAS) and piezoelectric sensors) have been applied. Among them, clamp-on sensors have attracted attention due to their advantages such as easy installation and no need for power outages.

[0003] However, existing clamp-on monitoring devices have significant drawbacks: Risk of long-term compression damage: To ensure signal coupling quality, sensors typically require a large clamping force to be fixed to the cable. Long-term static clamping can cause irreversible plastic deformation or indentation of the cable's outer sheath, potentially accelerating insulation aging under high-load heating conditions and even triggering new fault points; Vibration signal interference: Cables generate continuous vibrations during normal operation and in ambient wind. Traditional rigid clamping methods rigidly couple the sensor to the cable, causing the device to pick up a large amount of irrelevant environmental and internal vibration noise, severely drowning out weak characteristic signals generated by fault impacts (such as chiseling or partial discharge), leading to false alarms or missed alarms; Poor adaptability: Devices with fixed clamping forces are difficult to adapt to cables of different diameters or to thermal expansion and contraction caused by temperature changes, potentially resulting in clamping forces that are too loose (signal distortion) or too tight (aggravated damage).

[0004] To address the above problems, this invention provides an intelligent cable fault monitoring and location device to solve these issues. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: an intelligent cable fault monitoring and location device, comprising:

[0006] A housing is fitted onto a cable, and the housing includes a housing one and a housing two. The housing one is hinged to the housing two on one side by a hinge shaft. A buckle is installed on the side of the housing two away from the hinge shaft. The housing one and the housing two are installed on the cable's test node by the buckle.

[0007] The electrical control box is fixed on the housing.

[0008] The clamping assembly is installed inside the first housing and the second housing;

[0009] The clamping assembly includes a first clamping assembly and a second clamping assembly. Two first clamping assemblies are configured and symmetrically arranged in the middle of the first housing and the second housing. The second clamping assemblies are symmetrically arranged on both sides of the first clamping assembly and located at the edge of the first housing and the second housing. Multiple second clamping assemblies are symmetrically arranged.

[0010] Furthermore, preferably, current transformers are fixed inside both housing one and housing two, and the two current transformers form a closed circuit when they are close to each other.

[0011] Further, preferably, the first clamping component includes:

[0012] A sliding block is slidably disposed within the housing, and a clamping spring is provided between the block and the housing;

[0013] A contact sensor is slidably positioned in the middle of the sliding block, and a pressing spring is provided between the sensor and the sliding block.

[0014] The first clamping ring is sleeved on the outer wall of the sliding block and is slidably connected to the housing.

[0015] Further, preferably, the first clamping ring includes:

[0016] A semi-ring body with a sliding groove in the middle corresponding to the sliding block. Two guide plates are symmetrically fixed on the side of the semi-ring body near the housing. The two guide plates are slidably connected to the housing, and a clamping spring is provided between them and the housing.

[0017] Two ventilation slots are configured to symmetrically penetrate the semi-annular body and extend axially along the semi-annular body.

[0018] One type of heat dissipation hole is configured as multiple holes, which are equidistantly opened on the inner wall of the semi-annular body and communicate with the ventilation slot.

[0019] Furthermore, preferably, both sides of the ventilation slot are provided with a flared opening, and the larger openings of the flared openings are arranged opposite each other. The cross-sectional size of the ventilation slot and the corresponding positions of the plurality of heat dissipation holes is the same as the smaller opening of the flared opening.

[0020] Furthermore, preferably, an elastic ring is embedded at the edge of the heat dissipation hole, and the elastic ring protrudes from the heat dissipation hole when not subjected to external force.

[0021] Further, preferably, the second clamping component includes:

[0022] A sliding column is slidably disposed within the housing, and a clamping spring is provided between the column and the housing.

[0023] The second clamping ring is hinged to the sliding column by a hinge pin, and a torsion spring is sleeved at the hinge position.

[0024] An air duct is formed through the second clamping ring and is arranged axially along the second clamping ring;

[0025] The second type of heat dissipation hole is configured as a plurality of holes, which are equally spaced on the inner wall of the second clamping ring and are connected to the air duct.

[0026] Furthermore, preferably, both sides of the air intake groove are provided with flared openings 2, and the larger openings of the flared openings 2 are arranged opposite each other. The cross-sectional size of the air intake groove and the corresponding positions of the multiple heat dissipation holes 2 is the same as the smaller opening of the flared openings 2.

[0027] An elastic ring is embedded in the edge of the second heat dissipation hole, and the elastic ring protrudes from the second heat dissipation hole when not subjected to external force.

[0028] Compared with the prior art, the present invention provides an intelligent cable fault monitoring and location device, which has the following beneficial effects:

[0029] In this invention, the first and second clamping rings are arranged in a regional, multi-node manner to distribute the clamping force over a larger area, reducing local stress concentration. Both the first and second clamping rings use springs to provide flexible clamping, avoiding the constant high pressure of traditional rigid clamps, reducing the risk of plastic deformation and indentation on the cable sheath, and allowing adaptive adjustment with the thermal expansion and contraction or slight deformation of the cable, preventing excessive clamping due to temperature changes. The flexible clamping can also buffer the impact of external vibrations or cable displacement, further protecting the cable surface. The ventilation slots, air guide slots, and heat dissipation holes form air circulation channels, using natural wind or airflow around the cable to remove heat. At the same time, the space in the ventilation slots and air guide slots creates a Venturi effect through the flared openings, increasing the airflow velocity and creating a negative pressure state in the heat dissipation holes, which adheres to the cable surface, improving the stability of the clamping. The greater the wind speed, the faster the airflow velocity in the channel, the stronger the negative pressure generated, and the greater the additional clamping force. Attached Figure Description

[0030] Figure 1 A schematic diagram of the overall installation status of an intelligent cable fault monitoring and location device;

[0031] Figure 2 A schematic diagram of the overall structure of an intelligent cable fault monitoring and location device;

[0032] Figure 3 A schematic diagram of the clamping component structure of an intelligent cable fault monitoring and positioning device;

[0033] Figure 4A schematic diagram of the structure of the first clamping component of an intelligent cable fault monitoring and locating device;

[0034] Figure 5 A schematic diagram of the structure of the second clamping component of an intelligent cable fault monitoring and positioning device;

[0035] In the diagram: 1. Cable; 2. Housing 1; 3. Housing 2; 4. Buckle; 5. Hinge shaft; 6. Electrical control box; 7. First clamping assembly; 8. Second clamping assembly; 31. Current transformer; 71. Sliding block; 72. Contact sensor; 73. First clamping ring; 81. Sliding column; 82. Second clamping ring; 731. Semi-ring; 732. Sliding groove; 733. Guide plate; 734. Ventilation groove; 735. Heat dissipation hole 1; 736. Horn mouth 1; 737. Elastic ring 1; 83. Hinge column; 84. Air duct; 85. Heat dissipation hole 2; 86. Horn mouth 2; 87. Elastic ring 2. Detailed Implementation

[0036] Reference Figures 1-5 The present invention provides a technical solution: an intelligent monitoring and location device for cable faults, comprising:

[0037] A housing is fitted onto cable 1, and the housing includes housing 1 2 and housing 2 3. Housing 1 2 is hinged to housing 2 3 on one side by a hinge shaft 5. Housing 2 3 is fitted with a buckle 4 on the side away from the hinge shaft 5. Housing 1 2 and housing 2 3 are mounted on the node to be tested on cable 1 by the buckle 4.

[0038] The electrical control box 6 is fixed on the housing 2.

[0039] The clamping assembly is installed inside the housing 1 2 and housing 2 3;

[0040] The clamping assembly includes a first clamping assembly 7 and a second clamping assembly 8. Two first clamping assemblies 7 are configured and symmetrically arranged in the middle of the housing 1 2 and the housing 2 3. The second clamping assemblies 8 are symmetrically arranged on both sides of the first clamping assembly 7 and located at the edge of the housing 1 2 and the housing 2 3. Multiple second clamping assemblies 8 are symmetrically arranged.

[0041] Specifically, the operator carries the device to the node to be tested on cable 1, opens the buckle 4, rotates the housing 2 3 around the hinge axis 5 to open it, puts cable 1 into the arc-shaped groove of housing 1 2, then closes housing 2 3 and fastens the buckle 4. The whole process does not require power outages or special tools, and is quick and easy. After the housing is closed, the symmetrically arranged first clamping component 7 and second clamping component 8 perform flexible clamping operations.

[0042] It should be noted that the shell is made of composite flame-retardant material.

[0043] Preferably, current transformers 31 are fixed inside both housing 2 and housing 3, and when the two current transformers 31 are close to each other, they form a closed circuit.

[0044] In other words, the device can be powered by the current transformer 31, ensuring the continuous operation of the device.

[0045] It should be noted that conductive plates can be installed near the two current transformers 31. The conductive plates are spring-loaded and slidably mounted near the two current transformers 31, so that they are pressed when the housing is closed, thus avoiding poor contact caused by external vibration.

[0046] In this embodiment, the first clamping component 7 includes:

[0047] The sliding block 71 is slidably disposed within the housing, and a clamping spring is provided between the sliding block 71 and the housing.

[0048] The contact sensor 72 is slidably disposed at the middle position of the sliding block 71, and a pressing spring is provided between the sensor and the sliding block 71.

[0049] The first clamping ring 73 is sleeved on the outer wall of the sliding block 71 and is slidably connected to the housing.

[0050] In a preferred embodiment, the first clamping ring 73 includes:

[0051] A semi-ring 731 has a sliding groove 732 in the middle corresponding to the sliding block 71. Two guide plates 733 are symmetrically fixed on the side of the semi-ring 731 near the housing. The two guide plates 733 are slidably connected to the housing, and a clamping spring is provided between them and the housing.

[0052] Two ventilation slots 734 are configured to symmetrically penetrate the semi-annular body 731 and penetrate along the axial direction of the semi-annular body 731.

[0053] Multiple heat dissipation holes 735 are configured and are equidistantly opened on the inner wall of the semi-annular body 731, and communicate with the ventilation slot 734.

[0054] Under the push of clamping spring one, the sliding block 71 first moves towards the cable 1, and the first clamping ring 73, which is sleeved outside the sliding block 71, also moves synchronously under the action of clamping spring two, thereby providing buffer while ensuring clamping force and avoiding the constant high pressure of traditional rigid clamps.

[0055] In addition, both sides of the ventilation slot 734 are provided with horn-shaped openings 736, and the larger openings of the horn-shaped openings 736 are arranged opposite each other. The cross-sectional size of the ventilation slot 734 and the corresponding positions of the multiple heat dissipation holes 735 is the same as the smaller opening of the horn-shaped openings 736.

[0056] In other words, the ventilation slot 734 generates a Venturi effect through the two horn-shaped openings 736, forming a local negative pressure at the heat dissipation hole 735 in windy conditions, generating an additional clamping force that increases with wind speed. This force intelligently enhances clamping stability, suppresses relative micro-movements caused by strong winds, and ensures that the signal coupling quality does not deteriorate under severe weather conditions. It can not only effectively dissipate heat at the cable 1 wrapping location but also provide negative pressure clamping.

[0057] Preferably, an elastic ring 737 is embedded at the edge of the heat dissipation hole 735, and the elastic ring 737 protrudes from the heat dissipation hole 735 when not subjected to external force.

[0058] In other words, an elastic ring 737 is embedded at the edge of each heat dissipation hole 735. The elastic ring 737 protrudes slightly from the opening of the heat dissipation hole 735 in its natural state. When the first clamping ring 73 presses against the cable, the elastic ring 737 first undergoes elastic deformation, forming a tight but flexible surface contact with the surface of the cable 1. Through elastic deformation contact, the unevenness of the surface of the cable 1 can be filled, ensuring a seal, so that the negative pressure effect can be effectively transmitted and utilized, forming an effective adsorption force.

[0059] In this embodiment, the second clamping component 8 includes:

[0060] A sliding column 81 is slidably disposed within the housing, and a clamping spring 3 is provided between the column and the housing;

[0061] The second clamping ring 82 is hinged to the sliding post 81 by a hinge post 83, and a torsion spring is sleeved at the hinge position.

[0062] An air duct 84 is formed through the second clamping ring 82 and is arranged axially along the second clamping ring 82;

[0063] Multiple heat dissipation holes 85 are configured and are equidistantly opened on the inner wall of the second clamping ring 82, and are connected to the air duct 84.

[0064] The hinge between the sliding column 81 and the second clamping ring 82 allows the second clamping ring 82 to adaptively adjust its angle during clamping, ensuring that its inner wall can fit well against any possible bending section of the cable 1, achieving uniform and stable support in the entire circumference. Furthermore, the second clamping assembly, as an auxiliary clamping component, enhances the overall adaptability of the device and the installation reliability on complex cable 1 paths.

[0065] Preferably, the air duct 84 has flared openings 86 on both sides, and the larger openings of the flared openings 86 are arranged opposite each other. The cross-sectional size of the air duct 84 and the corresponding positions of the multiple heat dissipation holes 85 is the same as the smaller opening of the flared openings 86.

[0066] An elastic ring 87 is embedded in the edge of the second heat dissipation hole 85, and the elastic ring 87 protrudes from the second heat dissipation hole 85 when not subjected to external force.

[0067] In other words, the arrangement of the air duct 84 and the second heat dissipation hole 85 is the same as that of the ventilation duct 734 and the first heat dissipation hole 735. Both can dissipate heat from the cable 1 while generating negative pressure to improve clamping stability.

[0068] It should be noted that multiple devices are installed continuously on cable 1 at certain intervals. When a fault occurs, the contact sensor 72 detects abnormal data, and the control box 6 will immediately perform local analysis. Once a potential fault event is confirmed, the device will immediately generate an alarm message. After receiving the message, the monitoring center can directly locate the specific device node that issued the alarm, thereby narrowing the fault range to the vicinity of that node and completing rapid fault location.

[0069] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cable fault intelligent monitoring and location device, characterized in that, include: The housing is fitted onto the cable (1), and the housing includes a first housing (2) and a second housing (3). The second housing (3) is hinged to one side of the first housing (2) by a hinge shaft (5). A buckle (4) is installed on the side of the second housing (3) away from the hinge shaft (5). The first housing (2) and the second housing (3) are installed on the node to be tested of the cable (1) by the buckle (4). The electrical control box (6) is fixed on the housing (2); Clamping components are installed inside the first housing (2) and the second housing (3); The clamping assembly includes a first clamping assembly (7) and a second clamping assembly (8). The first clamping assembly (7) is configured in two and symmetrically arranged in the middle of the first housing (2) and the second housing (3). The second clamping assembly (8) is symmetrically arranged on both sides of the first clamping assembly (7) and located at the edge of the first housing (2) and the second housing (3). The second clamping assembly (8) is symmetrically configured in multiples.

2. The intelligent cable fault monitoring and location device according to claim 1, characterized in that, Both housing 1 (2) and housing 2 (3) are fixed with current transformers (31), and when the two current transformers (31) are close to each other, they form a closed circuit.

3. The intelligent cable fault monitoring and location device according to claim 1, characterized in that, The first clamping assembly (7) includes: A sliding block (71) is slidably disposed inside the housing, and a clamping spring is provided between the sliding block (71) and the housing. A contact sensor (72) is slidably disposed in the middle position of the sliding block (71), and a pressing spring is provided between the sensor and the sliding block (71); The first clamping ring (73) is sleeved on the outer wall of the sliding block (71) and is slidably connected to the housing.

4. The intelligent cable fault monitoring and location device according to claim 3, characterized in that, The first clamping ring (73) includes: A semi-ring body (731) has a sliding groove (732) in the middle corresponding to the sliding block (71). Two guide plates (733) are symmetrically fixed on the side of the semi-ring body (731) near the housing. The two guide plates (733) are slidably connected to the housing, and a clamping spring is provided between them. Two ventilation slots (734) are configured to symmetrically penetrate the semi-annular body (731) and penetrate along the axial direction of the semi-annular body (731); A plurality of heat dissipation holes (735) are configured to be equidistantly opened on the inner wall of the semi-annular body (731) and communicate with the ventilation slot (734).

5. The intelligent cable fault monitoring and location device according to claim 4, characterized in that, Both sides of the ventilation slot (734) are provided with a flared opening (736), and the larger openings of the flared openings (736) are arranged opposite each other. The cross-sectional size of the ventilation slot (734) and the corresponding positions of the multiple heat dissipation holes (735) is the same as the smaller opening of the flared opening (736).

6. The intelligent cable fault monitoring and location device according to claim 4, characterized in that, An elastic ring (737) is embedded in the edge of the heat dissipation hole (735), and the elastic ring (737) protrudes from the heat dissipation hole (735) when not subjected to external force.

7. The intelligent cable fault monitoring and location device according to claim 1, characterized in that, The second clamping assembly (8) includes: A sliding column (81) is slidably disposed within the housing, and a clamping spring is provided between the column and the housing; The second clamping ring (82) is hinged to the sliding column (81) by a hinge column (83), and a torsion spring is sleeved at the hinge position; An air duct (84) is formed through the second clamping ring (82) and is arranged through the second clamping ring (82) axially. Multiple heat dissipation holes (85) are configured and are equidistantly opened on the inner wall of the second clamping ring (82) and are connected to the air duct (84).

8. The intelligent cable fault monitoring and location device according to claim 7, characterized in that, Both sides of the air duct (84) are provided with horn mouths (86), and the large openings of the horn mouths (86) are arranged opposite each other. The cross-sectional size of the air duct (84) and the corresponding positions of the multiple heat dissipation holes (85) is the same as the small opening of the horn mouths (86). An elastic ring (87) is embedded in the edge of the second heat dissipation hole (85), and the elastic ring (87) protrudes from the second heat dissipation hole (85) when not subjected to external force.

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