A lightweight insulation blanket and heat insulation bracket for live working

Abstract

The present invention provides a lightweight insulation blanket heat-insulating support for live working. Its technical solution to the technical problem includes two parallel end supports, with multiple pillars connected between the two end supports. The multiple pillars are arranged in a ring and used to support the insulation blanket. The end supports are annular structures, and the side walls of the end supports have an opening. The end supports are provided with a first adjustment device located within the opening for adjusting the size of the end supports. The inner side of the end supports are provided with multiple circumferentially distributed pressure columns, which press tightly against the working cable to form a support. Each pressure column is provided with a second adjustment device for adjusting the length of the pressure column. The present invention has an ingenious overall structure and is easy to install and disassemble. It can improve the heat dissipation efficiency of the cables being insulated during live working, thereby improving the safety of the operation.

Description

Technical Field

[0001] The invention belongs to the technical field of insulation protection for live working, in particular to a light insulation blanket heat insulation bracket for live working. Background Art

[0002] Insulation shielding during live distribution network work is a crucial technical measure to ensure the safety of workers and equipment. However, it suffers from long shielding times, numerous safety risks, and high labor intensity. Furthermore, in actual operations, there are issues with both excessive and insufficient insulation shielding. There is a lack of evidence to support the selection and standardization of insulation shielding methods during live distribution network work. Live distribution network work primarily focuses on evaluating shielding's insulation effectiveness and operational efficiency, selecting the optimal shielding method and equipment, and achieving standardization and improvement of operational efficiency and safety.

[0003] As my country's economy and society have higher and higher requirements for power supply reliability, live working has been widely used in urban and rural distribution networks. It improves the protective effect of insulation shielding and reduces the shielding time, selects appropriate shielding methods and shielding equipment, improves work efficiency and safety, promotes the application of live working in distribution networks, and improves line reliability and personnel safety.

[0004] In summer, when ambient temperatures are high and line loads are heavy, using insulation blankets to shield live conductors creates a tight space between the blanket and the conductor, hindering heat dissipation. Heat buildup can easily cause the insulation material in the blanket to melt, a phenomenon also seen in some other soft conductor shielding materials. This melting of the insulation material can lead to a loss of insulation performance, posing a potentially fatal safety risk to live-line workers.

[0005] Based on the existing shielding equipment and operating methods, the shielding effect, operating efficiency, operational convenience, and safety of insulating shielding equipment are all key development directions. There are many types of shielding equipment at home and abroad, and there is a lack of corresponding data as a basis for judging the insulation characteristics and shielding effect of shielding equipment. Therefore, research on the shielding effect, efficiency and optimization technology of different shielding methods is an important means to improve the efficiency, safety and standardization of live operations in distribution networks, and is of great significance to promoting the application of live operations in distribution networks. Summary of the Invention

[0006] The purpose of the present invention is to provide a lightweight insulation blanket insulation bracket for live working, which has an ingenious overall structure and is easy to install and disassemble. It can improve the heat dissipation efficiency of the insulated cables during live working and improve the safety of the operation.

[0007] The present invention provides a lightweight insulating blanket and thermal insulation support for live working. The technical solution to solve the technical problem includes two end supports parallel to each other, a plurality of pillars connected between the two end supports, and the plurality of pillars are arranged in a ring for supporting the insulating blanket. The end support is a ring structure, and the side wall of the end support has an opening. The end support is provided with a first adjustment device located in the opening for adjusting the size of the end support; the inner side of the end support is provided with a plurality of circumferentially distributed pressure columns, which are pressed tightly on the working cable to form a support, and each of the pressure columns is provided with a second adjustment device for adjusting the length of the pressure column.

[0008] Preferably, the number of the pillars is 3.

[0009] Preferably, the length of the pressure column ranges from 20 to 50 mm.

[0010] Preferably, the first adjustment device includes a first adjustment sleeve rod, one of the end heads in the upper opening of the end support is provided with a first threaded section, and the first adjustment sleeve rod is threadedly connected to the first threaded section.

[0011] Preferably, the second adjustment device includes a second adjustment sleeve rod, one end of the pressure column is provided with a second threaded section, and the second adjustment sleeve rod is threadedly connected to the second threaded section.

[0012] Preferably, the pillars and end supports are made of aerogel felt insulation material.

[0013] Preferably, a mounting hole is provided on the end support, and one end of the pillar is inserted into the mounting hole.

[0014] Preferably, the pressure column is arranged at a position facing the support column.

[0015] In summary, the technical solution of the present invention has at least the following beneficial effects:

[0016] 1. Ingenious structure, easy to install and dismantle;

[0017] 2. It can adapt to cables of different diameters and adjust the distance between the insulation blanket and the cable;

[0018] 3. Reduce direct contact between insulation blanket and cables, avoiding damage caused by overheating;

[0019] 4. The use of aerogel felt material reduces heat transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 Schematic diagram of the thermal insulation bracket structure;

[0022] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0023] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0024] Figure 4 The temperature of a single conductor and the temperature of a conductor wrapped in an insulation blanket vary with the distance from the conductor center.

[0025] Figure 5 The temperature variation curve of the insulation blanket at different gaps between the insulation blanket and the conductor;

[0026] Figure 6 The temperature cloud diagram of the gap 5mm between the insulation blanket and the conductor;

[0027] Figure 7 The temperature cloud diagram of the gap 10mm between the insulation blanket and the conductor;

[0028] Figure 8 The temperature cloud diagram of the gap 15mm between the insulation blanket and the conductor;

[0029] Figure 9 The temperature cloud diagram of the gap 20mm between the insulation blanket and the conductor;

[0030] In the figure: 1, end support; 2, pillar; 3, pressure column; 4, first adjustment sleeve; 5, first threaded section; 6, second adjustment sleeve; 7, second threaded section. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] The present invention provides a lightweight insulation blanket heat insulation bracket for live working, such as Figure 1-9As shown, it includes two end supports 1 parallel to each other. The end support 1 is the basic component of the entire bracket. A plurality of pillars 2 are connected between the two end supports 1. In this application, three evenly distributed pillars 2 are used. The three pillars 2 are arranged in a ring structure for supporting the insulation blanket. The end support 1 is a ring structure. The side wall of the end support 1 has an opening. When in use, the end support 1 is put on the cable that needs insulation protection through the opening. The end support 1 is provided with a first adjustment device located in the opening for adjusting the size of the end support 1; thereby, it can adapt to cables of different diameters; in addition, a plurality of circumferentially distributed pressure columns 3 are provided on the inner side of the end support 1. When in use, one end of the pressure column 3 is pressed tightly on the cable to form support. In this way, the bracket can be fixed to the cable through the end supports 1 and the pressure columns 3 at both ends. Then, the insulation blanket can be put on the pillars 2 to form insulation protection. In this way, a certain gap can be maintained between the insulation blanket and the cable under the action of the bracket, thereby avoiding direct contact between the cable and the insulation blanket, avoiding insulation failure caused by high temperature damage to the insulation blanket, and improving safety. Each of the pressure columns 3 is provided with a second adjustment device for adjusting the length of the pressure column 3, so that the distance between each support 2 and the cable can be adjusted. The length of the pressure column 3 in the present invention is in the range of 20-50 mm. This distance is the optimal choice for the thermal insulation distance analysis of the thermal insulation bracket through simulation software. The simulation results are as follows: Figure 4 As shown in the figure, under normal current load, the maximum temperature of a single conductor is 324K, and the conductor temperature decreases with the increase of air radius. When the conductor is wrapped with an insulation blanket, there is a 1mm gap between the insulation blanket and the conductor. At this time, the maximum temperature of the conductor is 351K, which is 24K higher than the temperature of the single conductor working room. The temperature of a single conductor decreases faster in the air radius of 0-100mm, while the temperature decreases less when the conductor is wrapped with an insulation blanket at a distance of 0-100mm from the center of the conductor than when the conductor is wrapped with an insulation blanket.

[0033] according to Figure 5 As shown, when the insulation blanket is 5, 10, 15, and 20 mm away from the conductor, the temperature of the insulation blanket will decrease as the distance from the conductor center increases. The temperature cloud diagram of the insulation blanket is as follows: Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 As shown, increasing the distance between the insulation blanket and the conductor can provide thermal insulation for the insulation blanket. Figure 4 and Figure 5 The insulation distance between the insulation blanket and the conductor can be selected to be between 20-50mm.

[0034] One embodiment of the first adjustment device in the present invention includes a first adjustment sleeve rod 4, and a first threaded section 5 is provided on one end of the opening in the end support 1. The first adjustment sleeve rod 4 is threadedly connected to the first threaded section 5. By screwing the first adjustment sleeve rod 4 and pressing the other end of the first adjustment sleeve rod 4 against the other end of the opening of the end support 1, the size of the end support 1 can be adjusted to adapt to cables of different diameters, and the convenience of installation can be achieved by adjusting the size of the opening.

[0035] One embodiment of the second adjustment device in the present invention includes a second adjustment sleeve rod 6, one end of the pressure column 3 is provided with a second threaded section 7, the second adjustment sleeve rod 6 and the second threaded section 7 are threadedly connected, the length of the pressure column 3 can be adjusted by the second adjustment sleeve rod 6, the other end of the second adjustment sleeve rod 6 is against the outer edge surface of the cable, and the cable can be tightened by adjustment to improve the stability of the fixation. At the same time, the optimal thermal insulation distance of 20-50mm can be selected as needed.

[0036] In the present invention, the pillars 2 and the end supports 1 are made of aerogel felt insulation material, which is a nano-scale porous material with a thermal conductivity of 0.018 W / (K·m), which is lower than the thermal conductivity of air.

[0037] In order to facilitate the installation of the pillar 2, the present invention provides a mounting hole on the end support 1, and one end of the pillar 2 is inserted into the mounting hole to achieve connection with the end support 1.

[0038] In order to improve the supporting effect of the pillar 2 on the insulating blanket and facilitate the length adjustment of the pressure column 3 to directly reflect the distance between the insulating blanket and the cable, the present invention sets the pressure column 3 at a position directly opposite the pillar 2, so that the force point of the pillar 2 is concentrated on the pressure column 3, which can improve the overall supporting effect and improve the stability of the structure.

[0039] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A lightweight insulation blanket and heat insulation bracket for live working, characterized in that: The invention comprises two end supports parallel to each other, a plurality of pillars being connected between the two end supports, the plurality of pillars being arranged in a ring for supporting an insulating blanket, the end support being a ring structure, the side wall of the end support being provided with an opening, the end support being provided with a first adjustment device located in the opening for adjusting the size of the end support; a plurality of circumferentially distributed pressure columns being provided on the inner side of the end support, the pressure columns being pressed tightly on the operating cable to form a support, each of the pressure columns being provided with a second adjustment device for adjusting the length of the pressure column; the first adjustment device comprising a first adjustment sleeve, one of the end heads in the opening of the end support being provided with a first threaded section, the first adjustment sleeve being threadedly connected to the first threaded section; the second adjustment device comprising a second adjustment sleeve, one end of the pressure column being provided with a second threaded section, the second adjustment sleeve being threadedly connected to the second threaded section.

2. A lightweight insulation blanket and heat insulation support for live working according to claim 1, characterized in that: The number of the pillars is 3.

3. A lightweight insulation blanket and heat insulation support for live working according to claim 1, characterized in that: The length of the pressure column ranges from 20 to 50 mm.

4. A lightweight insulation blanket and heat insulation support for live working according to claim 1, characterized in that: The pillars and end supports are both made of aerogel felt insulation material.

5. A lightweight insulation blanket and heat insulation support for live working according to claim 1, characterized in that: The end support is provided with a mounting hole, and one end of the support column is inserted into the mounting hole.

6. A lightweight insulation blanket and heat insulation support for live working according to claim 1, characterized in that: The pressure column is arranged at a position facing the support column.

Images