Visual high-temperature early-warning wiring device

Abstract

The invention discloses a visual high-temperature early-warning wiring device which comprises a base body and a temperature sensing thrust piece arranged on the inner wall of a visual high-temperature early-warning block. The base body is used for being connected with a wire. The heat generated by the wire can be transmitted to the temperature sensing thrust piece, and the temperature sensing thrust piece stretches out and draws back according to the change of the heat generated by the wire. When the temperature sensing thrust piece stretches out, the temperature sensing thrust piece can drive the visual high-temperature early warning block to move along the inner wall of the base body till the visual high-temperature early warning block stretches out of the outer wall of the base body at the same time. Inspection personnel can visually visualize the state of the indication sheet of the high-temperature early-warning wiring device so as to find out an overheat point and solve a fault point in advance. When the temperature of a line connection point rises and exceeds a set early warning temperature threshold value due to installation and construction quality problems or power system load fluctuation and the like, the elastic modulus of the memory spring changes along with the temperature, the elastic force changes to push the visual high-temperature early warning block to pop out, and the sensitive high-temperature early warning effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of power transmission lines, and in particular to a visual high-temperature early warning wiring device. Background Technology

[0002] During the operation of overhead power lines, increased contact resistance frequently occurs at line connection points due to factors such as installation and construction quality, or long-term equipment use. Simultaneously, periodic overloads and other issues also occur occasionally, all of which can lead to overheating at line connection points and severely impact the normal operation of the line.

[0003] When power lines malfunction, existing technologies for monitoring and troubleshooting overheating at line connection points have many shortcomings. Traditional monitoring methods often lack real-time capability and cannot detect overheating at line connection points in a timely manner. By the time the problem is discovered, the fault may have already caused significant damage to the line, affecting the normal power supply.

[0004] In terms of fault location, existing technologies cannot quickly and accurately pinpoint the fault location. Maintenance personnel need to spend a significant amount of time and effort conducting comprehensive inspections, which not only increases the workload of maintenance personnel but also prolongs power outages, causing substantial losses to power companies and users. Moreover, traditional methods typically require additional testing instruments, which are complex to operate, costly, and inefficient.

[0005] In summary, existing technologies cannot meet the requirements for real-time monitoring and effective alarm of overheating at line connection points, rapid assistance to maintenance personnel in locating fault points, shortening fault inspection time, reducing the labor intensity of operation and maintenance personnel, reducing power outage losses, and ensuring power supply reliability. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is: how to provide a wiring device for real-time monitoring and effective alarm of overheating at line connection points.

[0007] The above-mentioned technical problems are solved by the following technical solution: This invention proposes a visual high-temperature warning wiring device, which includes a substrate, a visual high-temperature warning block disposed on the inner wall of the substrate, and a temperature-sensing thrust member disposed on the inner wall of the visual high-temperature warning block; the substrate is used to connect with a wire; the heat generated by the wire can be transferred to the temperature-sensing thrust member, and the temperature-sensing thrust member generates an extension and contraction action according to the change in heat generated by the wire; when the temperature-sensing thrust member generates an extension action, it can drive the visual high-temperature warning block to move along the inner wall of the substrate until it extends out of the outer wall of the substrate.

[0008] In a preferred embodiment of the visual high temperature early warning wiring device of the present invention: a wire clamp is provided on the front side of the base, and wire holes are provided on both sides of the wire clamp, the wire holes being used to connect to the wire.

[0009] In a preferred embodiment of the visual high temperature early warning wiring device of the present invention: a wiring conductive rod is provided on the side of the base, a guide sleeve is provided on the wiring conductive rod, a reinforcing rib is provided below the base, and a wiring terminal is provided above the wiring conductive rod.

[0010] In a preferred embodiment of the visual high temperature warning wiring device of the present invention: the visual high temperature warning block includes a fixed end and a pre-tightening gasket disposed on the fixed end, and the end of the temperature sensing thrust member is fixed to the end face of the fixed end.

[0011] In a preferred embodiment of the visual high temperature early warning wiring device of the present invention: an indicator plate is provided at the end of the temperature sensing thrust member away from the fixed end, and a reflective marking block is provided on the indicator plate.

[0012] In a preferred embodiment of the visual high temperature early warning wiring device of the present invention: a micro-arc bonding piece is provided inside the visual high temperature early warning block, the micro-arc bonding piece is disposed in the bonding groove, a dynamic load balancing block is provided in the bonding groove, and a positioning boss is provided on the dynamic load balancing block.

[0013] In a preferred embodiment of the visual high temperature early warning wiring device of the present invention: electromagnetic shielding layers are provided on both sides of the fixed end, heat dissipation fins are provided on the outer side of the electromagnetic shielding layers, and a locking platform is provided on the inner side of the heat dissipation fins.

[0014] In a preferred embodiment of the visual high temperature early warning wiring device of the present invention: locking buckles are provided on both sides of the fixed end, and limit blocks are provided on the locking buckles.

[0015] In a preferred embodiment of the visual high temperature early warning wiring device of the present invention: an arc-shaped washer is provided on the outer surface of the wire clamp, a bolt is provided on the front side of the arc-shaped washer, the bolt is threadedly engaged with the wire clamp clamping nut, and a wire clamp washer is provided between the bolt and the wire clamp clamping nut.

[0016] In a preferred embodiment of the visual high temperature early warning wiring device of the present invention: the temperature sensing thrust component is made of shape memory alloy.

[0017] The beneficial effects of this invention are as follows: Inspection personnel can visually detect hot spots and resolve fault points in advance by observing the indicator status of the high-temperature warning wiring device. When the temperature at the line connection point rises above the set warning temperature threshold due to installation or construction quality issues or power system load fluctuations, the elastic modulus of the memory spring changes with the temperature, and the change in elastic force pushes the visual high-temperature warning block to pop out, achieving a sensitive high-temperature warning effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of the overall structure of the visual high-temperature early warning wiring device is shown; Figure 2 A schematic cross-sectional view of the overall structure of the visual high-temperature early warning wiring device is shown. Figure 3 A partial structural cross-sectional view of the visual high-temperature warning wiring device is shown; Figure 4 A schematic diagram of the guide sleeve structure of the visual high-temperature early warning wiring device is shown; Figure 5 A schematic diagram of the reinforced rib structure of the visual high-temperature warning wiring device is shown.

[0019] In the diagram: 1. Substrate; 2. Visual high-temperature warning block; 201. Fixed end; 202. Pre-tightening gasket; 203. Indicator plate; 2031. Reflective identification block; 3. Temperature-sensing thrust component; 31. Memory spring; 4. Wire clamp; 401. Arc-shaped gasket; 402. Bolt; 403. Wire clamp nut; 404. Wire clamp gasket; 5. Wire hole; 6. Connecting conductive rod; 601. Terminal block; 7. Micro-arc bonding piece; 701. Bonding groove; 8. Dynamic load balance block; 801. Positioning boss; 9. Electromagnetic shielding layer; 11. Heat dissipation fins; 12. Locking platform; 13. Locking buckle; 14. Limiting block; 15. Guide sleeve; 16. Reinforcing rib. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0022] Reference Figures 1-3 This embodiment provides a visual high temperature warning wiring device, including a base 1, a wire clamp 4 on the front side of the base 1, an arc-shaped gasket 401 on the outer surface of the wire clamp 4, a bolt 402 on the front side of the arc-shaped gasket 401, a wire hole 5 on the side of the wire clamp 4, a wiring conductive rod 6 on the side of the base 1, and visual high temperature warning blocks 2 on both sides of the front of the base 1.

[0023] The inner side of the visual high-temperature warning block 2 is provided with a temperature-sensing thrust component 3. It should be noted that the temperature-sensing thrust component 3 is made of shape memory alloy. The temperature-sensing thrust component 3 can be a shape memory spring 31, or a shape memory alloy sheet, shape memory alloy wire, or other components that conform to the working principle of this invention. For ease of description, the following description of the temperature-sensing thrust component 3 will use shape memory spring 31 as an example. The working principle of shape memory alloy sheet and shape memory alloy wire is the same as that of shape memory spring 31 described in this invention.

[0024] The end of the memory spring 31 is fixed to the fixed end 201. A spring preload washer 202 is provided on the fixed end 201. An indicator piece 203 is provided on the other end of the memory spring 31. An identification reflective mark 2031 is provided on the indicator piece 203.

[0025] Reference Figure 2 and Figure 3 The visual high temperature warning block 2 is equipped with a micro-arc bonding piece 7, which is set in the bonding groove 701. The bonding groove 701 is equipped with a dynamic load balance block 8, and the dynamic load balance block 8 is equipped with a positioning boss 801.

[0026] Reference Figure 4 and Figure 5 A guide sleeve 15 is provided on the conductive rod 6, and a reinforcing rib 16 is provided below the base 1. Electromagnetic shielding layers are provided on both sides of the fixed end 201, heat dissipation fins 11 are provided on the outer side of the electromagnetic shielding layers, and locking platforms 12 are provided on the inner side of the heat dissipation fins 11.

[0027] Locking buckles 13 are provided on both sides of the fixed end 201, and limit stops 14 are provided on the locking buckles 13. A terminal block 601 is provided above the wiring conductive rod 6. The bolt 402 is threadedly engaged with the clamp 4 and the clamp nut, and a washer of the clamp 4 is provided between the bolt 402 and the clamp 4 and the clamp nut.

[0028] Working Principle: This device is installed at various connection points of power lines to monitor and alarm for overheating at line connections in real time. The temperature at the conductor monitoring point in the power line is set to T. When temperature T is within the normal operating range T0 (20℃~30℃), the elastic modulus E0 keeps the spring compressed, preventing the indicator 203 from popping out. When temperature T rises above the set warning temperature threshold T1 (85℃), the elastic modulus E0 of the memory spring 31 changes, causing the spring to return to its original shape and pop out the indicator 203.

[0029] In the contact portion between the wire clamp and the conductor, the clamping force F applied by the wire clamp to the conductor remains constant, with its fluctuation range within... Within, and the DC resistance ratio after the clamp is connected to the conductor. satisfy DC resistance ratio ; The overload capacity of the wiring device reaches the rated current. More than twice the actual current through the wiring device satisfy During the duration The temperature rise of the wiring device during a 1-hour overload test. No more than The wiring device uses arc-shaped gaskets and is fixed by high-pressure crimping with bolts. Warning displays for different temperature ranges: Mild high temperature warning: When the joint temperature reaches 85-95℃, the shape memory alloy spring will partially recover its deformation and output driving force. satisfy: in This is the equivalent stiffness of the transmission system. This is half the length of the indicator pop-out corresponding to the first stage displacement. When the temperature exceeds 95-105℃, the spring completes a full phase change and outputs maximum driving force. : in For shape memory alloys, the recovery stress is ≥300 MPa. The red indicator section is clearly visible, representing the effective cross-sectional area of ​​the spring, enabling a high-level alarm. Inspectors can visually identify the hot spot, indicating that the line connection point has experienced a certain degree of temperature abnormality, but it has not yet reached a serious level.

[0030] Severe heatwave warning: When the temperature Further increase, exceeding When within the specified range, the indicator light fully pops up, i.e., the pop-up length. The more prominent red warning sign reminds inspection personnel that the temperature of the hot spot is already very high and needs to be addressed immediately to prevent the line fault from worsening.

[0031] When the temperature at the connection point of the line decreases, the indicator plate will not retract due to the special material properties and structural design of the memory spring. This is to ensure that inspection personnel can clearly see the hot spots that have occurred during subsequent inspections, which facilitates the recording and analysis of fault history, allows for the early resolution of potential fault points, and effectively shortens the total time for power outage maintenance.

[0032] The wiring device is made of aluminum alloy, and the electrical conductivity of aluminum alloy is high. Not less than Salt spray corrosion resistance time of materials Not less than 1000 hours, and subjected to oxidation environment After a 500-hour oxidation test, the thickness of the surface oxide layer does not exceed 0.01 mm; The indicator uses a red overheat warning light to pop up when the temperature T exceeds the limit. When within a range, the length of the indicator pop-up. Total length of the indicator plate of When the temperature Exceeding When the temperature reaches the specified range, all indicator plates pop out, causing them to extend beyond the outer wall of the high-temperature warning block.

[0033] As an optional embodiment, a visual high-temperature warning block and a built-in memory spring are included, the elastic modulus of which is... The following conditions must be met: at temperature Within normal working range At that time, elastic modulus The spring is compressed to prevent the indicator from popping out; when the temperature T rises above the set warning temperature threshold... At that time, the elastic modulus of the memory spring The change occurs, and the change satisfies the formula ,in The constant value of the spring material ensures that the spring returns to its original shape, ejecting the indicator plate, and that the indicator plate does not retract when the temperature decreases. The contact portion between the wire clamp and the wire in the wiring device; the contact area of ​​the wire clamp. With the cross-sectional area of ​​the conductor Satisfying Relationships The clamping force applied by the wire clamp to the conductor To remain constant, its fluctuation range is within Within, and the DC resistance ratio after the clamp is connected to the conductor. satisfy DC resistance ratio The calculation formula is ,in This is the DC resistance after the clamp is connected to the wire. The DC resistance of wires of the same length and material.

[0034] The overload capacity of the wiring device reaches the rated current. More than twice that, that is, when the actual current through the wiring device satisfy During the duration The temperature rise of the wiring device during a 1-hour overload test. No more than It can work reliably and ensure the stability of power transmission.

[0035] The wiring device uses arc-shaped washers and is secured by high-pressure bolt clamping. The bolt tightening torque M satisfies the formula... Where K is the tightening torque coefficient, and its value range is... ; This is the preload of the bolt, and its value is determined based on the specifications of the clamp and the conductor. The nominal diameter of the bolt ensures a reliable connection at vibration frequencies. for acceleration amplitude for Under vibration environment, after After a 24-hour vibration test, the connection points will not loosen or fall off.

[0036] The wiring device is made of high-strength special aluminum alloy material, which has high electrical conductivity. Not less than To ensure no electromagnetic loss; the material's resistance to salt spray corrosion time Not less than 1000 hours, and subjected to oxidation environment After a 500-hour oxidation test, the thickness of the surface oxide layer should not exceed 0.01 mm to achieve corrosion resistance and oxidation resistance.

[0037] Visual high-temperature early warning wiring devices are distributed and installed at various connection points of power lines to monitor and alarm for overheating at line connections in real time. When a high-temperature fault occurs at a line connection, it can quickly assist maintenance personnel in locating the fault point.

[0038] The simplified design of the visual high-temperature warning wiring device requires no additional testing instruments. It can alert to high temperatures at wire connections simply by visually observing the pop-up status of the indicator. Maintenance personnel can then determine the timing of the fault based on the indicator's status. No more than 5 minutes.

[0039] By using a visual high-temperature early warning wiring device, the inspection time during faults is shortened. Compared with traditional inspection methods, the inspection time is reduced by a significant percentage. satisfy This reduces the workload of maintenance personnel, minimizes losses caused by power outages, and improves the stability of the power grid system, thus reducing power outage time caused by faults in the power grid system. Compared to when the system is not used, it reduces above.

[0040] Inspection personnel can visually monitor the indicator light status of the high-temperature warning wiring device to identify overheated areas in advance, resolve fault points, and reduce the total time spent on power outage maintenance. Compared with traditional maintenance methods, it shortens maintenance time by more than 40%, improves power supply reliability, and achieves a power supply reliability rate R of over 99.9%.

[0041] Working principle of the visual high-temperature warning wiring device and system: The visual high-temperature warning wiring device mainly consists of wire clamps, wire connection parts, a visual high-temperature warning block, and a built-in memory spring. The wire clamps are used for reliable connection with the wires, and operate normally. During normal power transmission, the current in the line flows stably within the rated current range, and the temperature at the line connection points remains within the normal operating range. At this point, the elastic modulus of the memory spring... In a relatively stable state, the spring is compressed under appropriate preload, keeping the indicator plate in a non-pop-out position. The entire device is in normal monitoring mode and does not issue any warning signals.

[0042] When the contact resistance at a line connection point increases due to installation or construction quality issues, or when there are fluctuations in the power system load or short-term overloads, the temperature at the connection point gradually rises. When the temperature T rises above the set warning temperature threshold... At that time, the elastic modulus of a memory spring changes as the temperature increases. According to the formula... in These are constants related to the properties of the spring material. The spring force changes due to variations in the elastic modulus, which is the average value within the normal operating temperature range. When the spring force reaches a certain level, it returns to its original shape, causing the visual high-temperature warning block to pop out.

[0043] When the temperature at the connection point of the line decreases, the indicator plate will not retract due to the special material properties and structural design of the memory spring. This is to ensure that inspection personnel can clearly see the hot spots that have occurred during subsequent inspections, which facilitates the recording and analysis of fault history, allows for the early resolution of potential fault points, and effectively shortens the total time for power outage maintenance.

[0044] During system operation, each visual high-temperature warning wiring device independently monitors the temperature of its installed wiring connection point. The wiring device itself does not require additional testing instruments or complex data acquisition equipment; it relies solely on the mechanical movement of memory springs and indicator plates to reflect temperature changes.

[0045] When a high-temperature fault occurs at a line connection point, the indicator light of the corresponding visual high-temperature warning wiring device pops up, forming a clear visual warning signal. This visual alarm method does not require a complex signal transmission and processing system. During inspections, personnel can quickly obtain abnormal temperature information at line connection points and determine the location of overheated areas by directly observing the status of the indicator lights on each wiring device.

[0046] Based on the fault location information provided by the inspection personnel, maintenance personnel quickly arrived at the site to handle the fault. After repairing the fault, a new visual high-temperature early warning wiring device was installed, restoring the system to normal monitoring status and continuing real-time monitoring of all connection points of the power line to ensure the stability and reliability of power transmission.

[0047] Because the visual high-temperature early warning wiring device can directly and intuitively display overheated areas, maintenance personnel can determine the fault point within 5 minutes based on the status of the indicator plate. Compared with traditional inspection methods, the inspection time is reduced by more than 50%, improving the efficiency of fault diagnosis. There is no need to use complex testing instruments for point-by-point testing; maintenance personnel can complete the inspection of a large number of line connection points simply by visual inspection, reducing labor intensity.

[0048] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A visual high-temperature early warning wiring device, characterized in that: It includes a substrate (1), a visual high temperature warning block (2) disposed on the inner wall of the substrate (1), and a temperature-sensing thrust member (3) disposed on the inner wall of the visual high temperature warning block (2). The substrate (1) is used for connection with the conductor; The heat generated by the conductor can be transferred to the temperature-sensing thrust member (3), and the temperature-sensing thrust member (3) will expand and contract according to the change in the heat generated by the conductor. When the temperature-sensing thrust member (3) elongates, it can drive the visual high-temperature warning block (2) to move along the inner wall of the substrate (1) until it extends out of the outer wall of the substrate (1).

2. The visual high-temperature early warning wiring device according to claim 1, characterized in that: The base (1) is provided with a wire clamp (4) on the front side, and wire holes (5) are provided on both sides of the wire clamp (4). The wire holes (5) are used to connect to the wire.

3. The visual high-temperature early warning wiring device according to claim 2, characterized in that: A wiring conductive rod (6) is provided on the side of the substrate (1), a guide sleeve (15) is provided on the wiring conductive rod (6), and a reinforcing rib plate (16) is provided below the substrate (1). A terminal block (601) is provided above the conductive rod (6).

4. The visual high-temperature early warning wiring device according to claim 3, characterized in that: The visual high temperature warning block (2) includes a fixed end (201) and a pre-tightening pad (202) disposed on the fixed end (201), and the end of the temperature sensing thrust member (3) is fixed to the end face of the fixed end (201).

5. The visual high-temperature early warning wiring device according to claim 4, characterized in that: The end of the temperature-sensing thrust member (3) away from the fixed end (201) is provided with an indicator plate (203), and a reflective marking block is provided on the indicator plate (203).

6. The visual high-temperature early warning wiring device according to claim 5, characterized in that: The visual high temperature warning block (2) is provided with a micro-arc bonding piece (7), which is located in the bonding groove (701). The bonding groove (701) is provided with a dynamic load balance block (8), which is provided with a positioning boss (801).

7. The visual high-temperature early warning wiring device according to claim 6, characterized in that: Electromagnetic shielding layers are provided on both sides of the fixed end (201), heat dissipation fins (11) are provided on the outer side of the electromagnetic shielding layers, and locking platforms (12) are provided on the inner side of the heat dissipation fins (11).

8. The visual high-temperature early warning wiring device according to claim 7, characterized in that: Locking buckles (13) are provided on both sides of the fixed end (201), and limit stops (14) are provided on the locking buckles (13).

9. The visual high-temperature early warning wiring device according to claim 8, characterized in that: The outer surface of the wire clamp (4) is provided with an arc-shaped washer (401), and a bolt (402) is provided on the front side of the arc-shaped washer (401). The bolt (402) is threadedly engaged with the wire clamp (4) clamping nut. A wire clamp (4) washer is provided between the bolt (402) and the wire clamp (4) clamping nut.

10. The visual high-temperature early warning wiring device according to claim 1, characterized in that: The temperature-sensing thrust component (3) is made of shape memory alloy.

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