A heating device on a cold-heat shock line of a glass insulator

Abstract

This utility model discloses a heating device for the thermal shock line of glass insulators, relating to the technical field of glass insulator production equipment. Its structure includes a segmented heat-insulating heating device with an annular cover installed between the two ends of a horizontal chain conveyor. The segmented heat-insulating heating device includes a support base, an arched heat-insulating cover installed on the support base, an isolation cover installed on the support base and covering the arched heat-insulating cover, a flame-spraying heating device installed on the arched heat-insulating cover and the isolation cover, extending from the glass insulator input end to the output end, and several electric heating devices. This utility model achieves second-level temperature rise through front-end gas-spraying, rapidly eliminating intolerant insulators and improving testing efficiency; the rear-end electric heating gradient temperature control results in small temperature fluctuations and improved data repeatability; the equipment is adaptable to testing multiple specifications of insulators, reducing maintenance costs, and its overall performance reaches international leading levels, providing an efficient, reliable, and economical standardized solution for the manufacturing of power insulation equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of glass insulator production equipment, and in particular relates to a heating device for a glass insulator thermal shock line. Background Technology

[0002] As a critical high-voltage transmission component in power systems, the performance stability of glass insulators directly affects the safety and reliability of power grid operation. During long-term service, glass insulators must withstand extreme temperature changes (such as sudden cooling in frigid environments and sudden heating under high-temperature loads). If thermal stress defects exist within the material, it may lead to cracking, breakdown, or even breakage of the insulator, thereby causing transmission accidents. Therefore, thermal shock testing has become a core component in evaluating the weather resistance and structural reliability of glass insulators. It simulates sudden temperature changes under actual operating conditions to test the insulator's ability to withstand thermal expansion and contraction over a short period.

[0003] Currently, the industry commonly uses traditional heating equipment for thermal shock testing of glass insulators, but this method has the following technical drawbacks: Traditional equipment often relies on single electric or gas heating, making it difficult to simultaneously meet the dual requirements of "rapid heating" and "precise temperature control." For example, pure electric heating systems have a slow heating rate (usually requiring 10-15 minutes to reach the target temperature), making it impossible to effectively screen insulators that are not resistant; while pure gas heating, although heating quickly, has large temperature fluctuations (above ±15℃), which can easily lead to qualified products being mistakenly judged as unqualified due to thermal stress damage; existing equipment has a simple heating chamber structure and lacks multi-stage temperature gradient control, resulting in uneven heating between the surface and interior of the insulator. Experiments show that the local temperature difference of glass insulators heated by traditional equipment can reach more than 30℃, inducing non-uniform thermal stress, causing the test results to deviate from actual working conditions, and the data repeatability is less than 60%.

[0004] As power grids upgrade towards ultra-high voltage and extra-high voltage, the performance requirements for glass insulators are becoming increasingly stringent. To meet these requirements, this invention proposes a heating device for the cold and hot impact wires of glass insulators.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the general background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this utility model is to provide a heating device for the thermal shock test of glass insulators. Through four core innovations—rapid screening, precise temperature control, structural optimization, and safety protection—it achieves high efficiency, reliability, and economy in the thermal shock test of glass insulators.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a heating device for a glass insulator's hot and cold impact wire, comprising a segmented heat preservation and heating device with an annular cover installed between the two ends of a horizontal chain conveyor; the segmented heat preservation and heating device includes a support base, an arched heat preservation cover installed on the support base, an isolation cover installed on the support base and covering the arched heat preservation cover, a flame-spraying heating device installed on the arched heat preservation cover and the isolation cover from the glass insulator's input end to its output end, and several electric heating devices.

[0008] As a preferred embodiment of this utility model, the support base includes a horizontal plate placed below the main body of the horizontal chain conveyor; the horizontal plate has rectangular through holes that cooperate with the support legs of the horizontal chain conveyor; and two rows of fixed support legs are fixed on the lower surface of the horizontal plate.

[0009] As a preferred embodiment of this utility model, the flame-heating device includes an electronic ignition controller, an electric ignition needle, and an air intake manifold that penetrates and is installed on the arch insulation cover and the isolation cover. The portion of the air intake manifold inside the arch insulation cover is fixedly connected to a row of downwardly inclined gas supply branches. A flame head is installed at the end of each gas supply branch. The electronic ignition controller is installed on the outer wall of the isolation cover. The electric ignition needle penetrates the arch insulation cover, and the tip of the electric ignition needle is adjacent to one of the flame heads. A flow regulating valve is installed on the portion of the air intake manifold located outside the isolation cover.

[0010] As a preferred embodiment of this utility model, the electric heating device includes a temperature controller, a set of electric heating tubes, a temperature sensor, and a flat-bottomed baffle; the temperature controller is installed on the outer wall of the insulating cover; the temperature sensor is installed through the outer wall of the arch insulation cover; the set of electric heating tubes is installed through the opposite side walls of the arch insulation cover, the set of electric heating tubes is horizontally arranged and not lower than the lower end of the flat-bottomed baffle; a flat-bottomed baffle is respectively provided on both ends of the set of electric heating tubes; the flat-bottomed baffle is fixed to the top inside the arch insulation cover.

[0011] In a preferred embodiment of this invention, the isolation cover has a rectangular structure. A sealing plate is installed in the space between the end of the isolation cover and the end of the archway insulation cover.

[0012] This utility model has the following beneficial effects: This utility model's front-end flame heating device quickly screens out glass insulators that are not resistant to instantaneous high-temperature impact, avoiding subsequent redundant testing processes and significantly shortening the production cycle.

[0013] This invention utilizes a multi-stage temperature-rise downstream electric heating device to achieve a gradient increase and precise control of the heating temperature. This fully meets the stringent temperature requirements of thermal shock testing for glass insulators, and improves the repeatability of test data.

[0014] This utility model uses a double-layer structure of an archway insulation cover and an isolation outer cover, filled with high-efficiency heat insulation material to reduce heat loss and lower gas and electricity consumption.

[0015] This utility model's flame heating device and electric heating device are independently adjustable: the heating parameters can be flexibly adjusted through the flow regulating valve and temperature controller to adapt to the testing needs of glass insulators of different specifications.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the heating device on the cold and hot impact wire of the glass insulator according to this utility model.

[0019] Figure 2 for Figure 1 The front view.

[0020] Figure 3 for Figure 1 The right view.

[0021] Figure 4 This is a schematic diagram of the interior of a single electric heating device unit.

[0022] Figure 5 This is a schematic diagram of a segmented heat preservation and heating equipment.

[0023] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0024] The attached diagram lists the components represented by each number as follows: 1-Horizontal chain conveyor, 2-Support base, 21-Horizontal plate, 22-Rectangular through hole, 23-Fixed support leg, 3-Arch insulation cover, 4-Isolation cover, 5-Flame heating equipment, 51-Inlet main pipe, 52-Inlet branch pipe, 53-Flame head, 54-Electronic ignition controller, 55-Electric ignition needle, 56-Flow regulating valve, 6-Electric heating equipment, 61-Temperature controller, 62-Electric heating tube, 63-Temperature sensor, 64-Flat bottom baffle. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Specific Implementation Example 1 Please see Figure 1-6 As shown, this utility model is a heating device for the cold and hot impact test line of glass insulators, including a segmented heat preservation and heating device with an annular cover installed between the two ends of a horizontal chain conveyor 1. The horizontal chain conveyor 1 carries the glass insulators and achieves continuous conveying, ensuring the automation and efficiency of the testing process. The segmented heat preservation and heating device meets the process requirements of rapid heating at the front and gradual heating at the rear.

[0027] The segmented heat preservation and heating equipment includes a support base 2, an archway heat preservation cover 3 mounted on the support base 2, an isolation cover 4 mounted on the support base 2 and covering the archway heat preservation cover 3, a flame-spraying heating device 5 mounted on the archway heat preservation cover 3 and the isolation cover 4, extending from the input end to the output end of a glass insulator, and several electric heating devices 6. The archway heat preservation cover 3 is the main heat preservation structure, forming a heating cavity inside to reduce heat loss. The isolation cover 4 is the external protective layer. Insulation material is filled between the archway heat preservation cover 3 and the isolation cover 4 to further reduce heat loss and ensure operational safety.

[0028] The flame-heating device 5 rapidly heats the incoming glass insulators, causing cracks to appear on insulators that are not resistant (resulting in defective products). Immediately afterwards, the set temperature gradient of several electric heating devices 6 increases, gradually raising the temperature of the glass insulators to the range required for thermal shock resistance.

[0029] The support base 2 includes a horizontal plate 21 positioned below the main body of the horizontal chain conveyor 1. The horizontal plate 21 has rectangular through holes 22 that mate with the support legs of the horizontal chain conveyor 1, ensuring a tight fit and eliminating installation gaps to improve structural stability. Two rows of fixed support legs 23 are fixed to the lower surface of the horizontal plate 21.

[0030] The flame-heating device 5 includes an electronic ignition controller 54, an electric ignition needle 55, and an air intake manifold 51 that runs through the arch insulation cover 3 and the outer isolation cover 4, connecting to an external gas source. The portion of the air intake manifold 51 inside the arch insulation cover 3 is fixedly connected to a row of downwardly sloping gas supply branches 52. A flame head 53 is installed at the end of each gas supply branch 52 to ensure uniform flame coverage of the insulator surface. The electronic ignition controller 54 is installed on the outer wall of the outer isolation cover 4, and triggers the ignition program upon receiving a start signal. The electric ignition needle 55 runs through the arch insulation cover 3, with its tip adjacent to one of the flame heads 53, enabling rapid and reliable ignition. A flow regulating valve 56 is installed on the portion of the air intake manifold 51 located outside the outer isolation cover 4 to precisely control the gas supply and adjust the flame intensity. Glass insulators that cannot withstand the heating of the flame-heating device 5 will quickly develop cracks due to thermal stress concentration and will be directly judged as unqualified products, thus achieving efficient screening.

[0031] The electric heating device 6 includes a temperature controller 61, a set of electric heating tubes 62, a temperature sensor 63, and a flat-bottomed baffle 64. The temperature controller 61 is installed on the outer wall of the insulating cover 4 and adjusts the power of the electric heating tubes 62 according to a preset program to achieve precise temperature control and gradient heating. The temperature sensor 63 is installed through the outer wall of the arch insulation cover 3 to monitor the internal temperature in real time and feed it back to the temperature controller 61. The set of electric heating tubes 62 is installed through the opposite side walls of the arch insulation cover 3, horizontally positioned and not lower than the lower end of the flat-bottomed baffle 64. A flat-bottomed baffle 64 is installed on each end of the set of electric heating tubes 62. The flat-bottomed baffle 64 is fixed to the top inside the arch insulation cover 3 to prevent the insulator from directly contacting the heating tubes, while optimizing heat flow distribution to ensure uniform heating. During the gradient heating process, the insulator gradually adapts to the high-temperature environment, avoiding damage to the internal structure due to sudden temperature changes and ensuring the accuracy of the test results.

[0032] The outer isolation cover 4 has a rectangular structure. A sealing plate is installed in the space between the ends of the outer isolation cover 4 and the ends of the arched insulation cover 3. This prevents heat loss and the entry of external dust and impurities, ensuring the stability of the heating environment.

[0033] This utility model features a segmented heat preservation and heating device. The front section uses flame heating to quickly remove defective products, improving production efficiency. The rear section uses electric heating with gradient heating and closed-loop control to ensure temperature fluctuations within ±5℃, meeting the stringent requirements of thermal shock testing. Optimized design of the support base and insulating casing allows the equipment to operate continuously for extended periods, reducing the failure rate by over 30%.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A heating device for a glass insulator thermal impact wire, characterized in that: Including a segmented heat preservation and heating device with an annular cover installed between the two ends of the horizontal chain conveyor (1); The segmented heat preservation and heating equipment includes a support base (2), an archway heat preservation cover (3) installed on the support base (2), an isolation cover (4) installed on the support base (2) and covering the archway heat preservation cover (3), a flame-spraying heating device (5) installed on the archway heat preservation cover (3) and the isolation cover (4) from the glass insulator input end to the output end, and several electric heating devices (6).

2. The heating device for the cold and hot impact wire of the glass insulator according to claim 1, characterized in that, The support base (2) includes a horizontal plate (21) placed below the main body of the horizontal chain conveyor (1); the horizontal plate (21) has a rectangular through hole (22) that cooperates with the support legs of the horizontal chain conveyor (1); and two rows of fixed support legs (23) are fixed on the lower surface of the horizontal plate (21).

3. The heating device on the cold and hot impact wire of the glass insulator according to claim 1, characterized in that, The flame-heating device (5) includes an electronic ignition controller (54), an electric ignition needle (55), and an air intake manifold (51) that runs through the arch insulation cover (3) and the isolation cover (4). The portion of the air intake manifold (51) inside the arch insulation cover (3) is fixedly connected to a row of downwardly inclined gas supply branches (52). A flame head (53) is installed at the end of the gas supply branches (52). The electronic ignition controller (54) is installed on the outer wall of the isolation cover (4). The electric ignition needle (55) runs through the arch insulation cover (3), and the tip of the electric ignition needle (55) is adjacent to one of the flame heads (53). A flow regulating valve (56) is installed on the portion of the air intake manifold (51) located outside the isolation cover (4).

4. The heating device on the cold and hot impact wire of the glass insulator according to claim 1, characterized in that, The electric heating device (6) includes a temperature controller (61), a set of electric heating tubes (62), a temperature sensor (63), and a flat-bottomed baffle (64); the temperature controller (61) is installed on the outer wall of the isolation cover (4); the temperature sensor (63) is installed through the outer wall of the arch insulation cover (3); a set of electric heating tubes (62) is installed through the opposite side wall of the arch insulation cover (3), the set of electric heating tubes (62) is horizontally arranged and not lower than the lower end of the flat-bottomed baffle (64); a flat-bottomed baffle (64) is respectively arranged on both ends of the set of electric heating tubes (62); the flat-bottomed baffle (64) is fixed to the top inside the arch insulation cover (3).

5. The heating device for the cold and hot impact wire of the glass insulator according to claim 1, characterized in that, The isolation cover (4) is a rectangular cover structure.

6. The heating device for the cold and hot impact wire of the glass insulator according to claim 1, characterized in that, A sealing plate is installed in the space between the end of the isolation cover (4) and the end of the arch insulation cover (3).

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