An umbrella-shaped parallel groove type insulating shelter device for a contact line and an insulating shelter method

Abstract

The present application belongs to the field of rail transit catenary insulation protection, and particularly relates to an umbrella-shaped parallel groove type insulation protection shed device for a contact wire and an insulation protection method, aiming to solve the problem that fire sprinkling water, pipeline leakage or condensate water may directly fall on the contact wire and form a conductive path, and the existing protection structure is difficult to stably install and guide the water flow without affecting the current collection of the pantograph. The present application comprises: an umbrella-shaped insulation protection shed body arranged above the contact wire, and a plurality of parallel groove clamps and connecting pieces arranged at intervals along the extension direction of the contact wire; the umbrella-shaped insulation protection shed body comprises a shed ridge part and a first protection part and a second protection part respectively extending downward to the two lateral sides; and the installation parameters of the protection shed are determined according to the overpass risk source, the dynamic position of the contact wire and the drainage condition. The present application can keep the current collection working surface on the lower side of the contact wire exposed, guide the water from above to the two sides of the contact wire, and improve the installation stability and on-site adaptability of the protection device.

Description

Technical Field

[0001] This invention relates to the field of insulation protection technology for rail transit overhead contact lines, specifically to an umbrella-shaped parallel trench insulation protection shed device and insulation protection method for contact lines. Background Technology

[0002] Electrified railways and urban rail transit lines typically supply traction power to vehicles via overhead contact lines. In indoor areas such as depots, maintenance yards, and operational depots, the overhead contact lines can be installed in a simple suspension configuration, with the contact wire directly mounted on the corresponding suspension or support device. The contact wire maintains sliding contact with the pantograph's sliding plate through the working surface below the contact wire to allow the vehicle to draw current.

[0003] Due to the limitations of the contact wire current collection method, the working surface below the contact wire needs to be exposed. Ordinary insulating sheaths are difficult to cover the entire outer circumference of the contact wire; otherwise, they can easily obstruct the contact between the pantograph sliding plate and the contact wire, affecting the normal current collection of vehicles. Therefore, in sections where fire water pipes, fire sprinklers, water supply and drainage pipelines, or other overhead equipment are installed above the contact wire, the contact wire usually lacks a protective structure that can simultaneously meet the requirements of insulation shielding and pantograph current collection.

[0004] When fire sprinklers activate or malfunction, when there is leakage in the overhead pipeline, or when condensation forms on the surface of the overhead equipment, water may fall directly onto the contact wire from above. Continuous water flow may also create a conductive path between the overhead equipment, adjacent structures, and the energized contact wire, causing short circuits, tripping, or other operational malfunctions in the contact network. Parts or foreign objects falling from the overhead equipment may also directly approach or come into contact with the contact wire, affecting the safe operation of the contact network.

[0005] In existing technologies, insulating plates or shielding plates can be installed above the contact wire to block falling water. However, ordinary flat plate structures lack clear drainage directions on both sides. After water falls onto the plate surface, it tends to accumulate on the plate surface, fall irregularly along the edge of the plate, or flow back towards the contact wire. At the same time, ordinary insulating plates usually require the assistance of surrounding building structures or additional supports for installation. In simple suspension sections of the contact wire where installation space is limited, it is not easy to keep them stably above the contact wire.

[0006] Furthermore, if the protective structure directly covers the contact wire or extends below it, it may obstruct the current-collecting working surface of the contact wire or encroach on the pantograph's passage area. When only a single fixed position is used to connect a long protective plate, the plate is also prone to deflection, slippage, or sagging under its own weight, water jet impact, and operational vibration.

[0007] Therefore, there is a need for an insulating protective device for contact wires that can be stably installed above the contact wire, blocking incoming water or foreign objects without obstructing the downstream working surface of the contact wire, and directing the water flow to the lateral sides of the contact wire. Summary of the Invention

[0008] To address the aforementioned problems in the prior art, namely that fire sprinkler water, pipeline leaks, or condensate may fall directly onto the contact wire and form a conductive path, and that existing protective structures are difficult to install stably and drain water without affecting the pantograph's current collection, this invention provides an umbrella-shaped parallel trench-type insulating protective canopy device and insulating protection method for contact wires.

[0009] In a first aspect, the present invention provides an umbrella-shaped parallel trench insulating protective canopy device for contact wires, comprising an umbrella-shaped insulating protective canopy body and a contact wire connection assembly; The umbrella-shaped insulating protective canopy is positioned above the contact wire and arranged along the extension direction of the contact wire; The umbrella-shaped insulating protective canopy includes a ridge section, a first protective section, and a second protective section. The first protective section and the second protective section are respectively connected to both sides of the ridge section and extend downward from the ridge section to both sides of the contact line laterally. The contact wire connection assembly is disposed on the lower side of the umbrella-shaped insulating protective canopy, and includes a plurality of parallel groove clamps spaced apart along the extension direction of the contact wire and a connector corresponding to each of the parallel groove clamps; The parallel groove clamp is detachably connected to the contact wire, and each of the connectors is respectively inserted into the corresponding parallel groove clamp and the ridge section. The parallel groove clamp is fixedly connected to the lower side of the ridge section through the connector.

[0010] Furthermore, the umbrella-shaped insulated protective canopy is made of insulated flame-retardant polyethylene material; The ridge section extends to both sides to form the first protective section and the second protective section, and the ridge section, the first protective section and the second protective section together form an umbrella-shaped canopy with a high center and low sides in cross-section.

[0011] Furthermore, a first upturned plate is connected to the side of the first protective part away from the ridge, and a second upturned plate is connected to the side of the second protective part away from the ridge. The tilting direction of the first upper flap is opposite to the tilting direction of the first protective part, and the tilting direction of the second upper flap is opposite to the tilting direction of the second protective part; The first upper flap is provided with a plurality of first drainage channels, and the second upper flap is provided with a plurality of second drainage channels. The plurality of first drainage channels and the plurality of second drainage channels are respectively arranged at intervals along the extension direction of the contact line.

[0012] Furthermore, the plurality of parallel groove clamps are arranged sequentially along the extension direction of the contact line, with a gap between adjacent parallel groove clamps; Each of the connectors corresponds to one of the parallel groove clamps. The parallel groove clamps and the ridge section are respectively provided with corresponding connection holes. Each connector passes through the corresponding connection hole and fixes the corresponding parallel groove clamp to the lower side of the ridge section.

[0013] Furthermore, the grooved wire is provided with a clamping groove that extends along the extension direction of the contact wire, and the contact wire passes through the clamping groove. The connector is a connecting bolt, which passes through the corresponding connecting holes on the parallel groove clamp and the ridge section, and securely connects the parallel groove clamp to the ridge section.

[0014] Furthermore, the umbrella-shaped insulating protective canopy is provided with end plates at both ends along the extension direction of the contact line. Each end plate extends laterally along the umbrella-shaped insulating protective canopy and is connected to the ends of the ridge, the first protective part, the second protective part, the first upper flap, and the second upper flap, respectively.

[0015] In a second aspect, the present invention provides a simple suspension insulation protection method for overhead contact lines, comprising: Obtain parameters of the risk source above, contact wire spatial parameters, contact wire dynamic displacement parameters, pantograph dynamic envelope, and protective device design parameters; The contact line risk assessment envelope is determined based on the contact line spatial parameters and the contact line dynamic displacement parameters. The risk source expansion influence envelope is determined based on the overpass risk source parameters. The effective risk projection area is determined based on the risk source expansion influence envelope and the contact line risk assessment envelope. The protected section is formed according to the effective risk projection area, and multiple candidate parameter groups are generated according to the protected section, the contact wire risk judgment envelope, the preset drainage safety distance and the design parameters of the protective device. Each candidate parameter group includes the length, width, installation position, roof inclination angle and arrangement parameters of the parallel trench clamps of the umbrella-shaped insulating protective shed. Based on each candidate parameter group, the drainage path and water landing area of ​​the water flow on the umbrella-shaped insulating protective shed are determined, and drainage safety verification, pantograph dynamic envelope verification and installation stability verification are performed on each candidate parameter group. Candidate parameter groups that meet the verification requirements are retained. The target parameter set is determined based on the comprehensive safety margin of the retained candidate parameter set, and an umbrella-type parallel trench insulating protective canopy device is installed on the contact line according to the target parameter set.

[0016] Furthermore, determining the effective risk projection area and forming the section to be protected includes: Based on the location of the risk source, the direction of spraying or leakage, the diffusion range of spraying or leakage, and the height difference between the risk source and the contact line, the theoretical influence envelope of the risk source is determined. The risk source extended influence envelope is obtained by superimposing the positional deviation of the upstream risk source, the spray or leakage direction deviation, the environmental disturbance offset, and the preset safety margin onto the theoretical influence envelope of the risk source. The risk source extended influence envelope intersects with the installation height plane determined by the design parameters of the protective device to obtain the risk section area, and the contact line risk judgment envelope is projected vertically onto the installation height plane to obtain the contact line risk projection area; The area where the risk section area intersects with the contact line risk projection area is determined as the effective risk projection area, and multiple effective risk projection areas that overlap after adding longitudinal protection margin are merged to obtain the section to be protected.

[0017] Furthermore, determining the drainage path and the water flow landing area, as well as performing the drainage safety check, includes: The surface height distribution of the umbrella-shaped insulating protective shed is determined based on the length, width, and shed surface inclination angle of the candidate parameter group, as well as the structural deformation parameters and installation deviation parameters in the design parameters of the protective device. The surface height distribution is divided into multiple drainage calculation areas, and the water flow in each drainage calculation area is directed to the drainage calculation area with the largest height drop in the adjacent drainage calculation area until the water flow reaches the edge of the umbrella-shaped insulating protective shed, thus obtaining the drainage path. The water accumulation area, the return path towards the contact line, and the drainage outlet area are determined according to the drainage path, and the water flow landing point area is determined according to the drainage outlet area and the preset water flow outward offset. Calculate the minimum distance between the water flow landing area and the contact line risk assessment envelope, and retain the candidate parameter group whose minimum distance is not less than the preset drainage safety distance and which has not formed the water accumulation area and the return path.

[0018] Furthermore, the dynamic envelope verification of the pantograph and the installation stability verification are performed, and the target parameter set is determined, including: Determine the minimum distance between the umbrella-shaped parallel trench insulating protective canopy device and the dynamic envelope of the pantograph, and verify the dynamic envelope of the pantograph based on the minimum distance; The installation load is determined based on the self-weight, water capacity, spray impact load, and vibration load of the umbrella-shaped insulating protective shed. Based on the installation load, the clamping capacity of the parallel groove clamp, and the allowable additional load of the contact wire, the installation stability is checked for the anti-slip capability of the parallel groove clamp and the structural deformation of the umbrella-shaped insulating protective shed. Based on the results of the drainage safety verification, the pantograph dynamic envelope verification and the installation stability verification, the corresponding safety margin of each candidate parameter group is determined, the minimum value of each corresponding safety margin is determined as the comprehensive safety margin, and the target parameter group is determined from the candidate parameter group whose comprehensive safety margin meets the preset safety requirements. After installing the umbrella-shaped parallel trench insulating protective canopy device, the actual water flow landing area, the actual minimum distance between the umbrella-shaped parallel trench insulating protective canopy device and the pantograph dynamic envelope, and the actual displacement state of the parallel trench clamp are obtained. When any of the obtained results does not meet the corresponding preset safety requirements, the design parameters of the protective device are updated according to the obtained results, and the target parameter group is re-determined.

[0019] The beneficial effects of this invention are: This invention places an umbrella-shaped insulating protective canopy above the contact line, with the first and second protective sections on both sides of the canopy ridge extending obliquely to the transverse sides of the contact line, forming an insulating shield above the contact line without obstructing the downstream working surface. The outer sides of the first and second protective sections are respectively provided with first and second upward-tilting plates in opposite directions, allowing water flowing to both sides of the canopy to collect between the corresponding protective sections and the upward-tilting plates. Multiple first and second drainage channels are respectively provided on the first and second upward-tilting plates, spaced apart along the contact line extension direction, allowing the collected water to be dispersed and discharged through multiple locations. End plates are provided at both ends of the umbrella-shaped insulating protective canopy, restricting water flow from the ends along the length of the canopy and guiding the water flow towards adjacent drainage channels, thereby reducing the likelihood of water directly falling onto the contact line, flowing back along the lower surface of the canopy, or concentrating at the ends of the canopy.

[0020] This invention uses multiple parallel groove clamps spaced along the contact wire's extension direction and corresponding connectors to fix an umbrella-shaped insulating protective canopy above the contact wire. The connectors pass through corresponding connection holes on the groove clamps and the canopy's ridge, creating a multi-point connection between the canopy and the clamps. This effectively distributes the canopy's own weight, water weight, spray impact, and operational vibration loads along its length, reducing the possibility of slippage, rotation, end warping, or localized sagging. Furthermore, the detachable connection between the groove clamps and the contact wire avoids obstructing the pantograph's passage space below the contact wire and facilitates the installation, removal, and maintenance of the protective device.

[0021] Based on the aforementioned device structure, this invention determines the effective risk projection area and the section to be protected according to the parameters of the risk source across the device, the contact wire space parameters, and the dynamic displacement parameters. Based on this, a candidate parameter set is generated, including parameters for the canopy length, width, installation position, canopy inclination angle, and parallel trench clamp arrangement. Candidate schemes that do not meet the requirements are screened out through drainage safety verification, pantograph dynamic envelope verification, and installation stability verification. The target parameter set is then determined based on the comprehensive safety margin. After the device is installed, the actual water flow landing area, the actual minimum distance between the device and the pantograph dynamic envelope, and the actual displacement state of the parallel trench clamps are further obtained. When the test results do not meet the requirements, the design parameters of the protective device are updated, thus forming a closed loop of parameter determination, device installation, on-site verification, and parameter correction. Attached Figure Description

[0022] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a structural diagram of an umbrella-shaped parallel trench insulating protective canopy device for contact wires according to the present invention; Figure 2 yes Figure 1 A magnified view of a portion of the image; Figure 3 This is a flowchart illustrating the simple suspension insulation protection method for overhead contact lines according to the present invention. Figure 4 This is a flowchart illustrating the method for determining the effective risk projection area of ​​the present invention. Figure 5 This is a flowchart illustrating the method for determining and verifying the target parameter set of the present invention. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figure 1 and Figure 2 As shown, the first embodiment of the present invention provides an umbrella-shaped parallel trench-type insulating protective canopy device for contact wires, which is suitable for simple suspension sections of contact wires, especially for depots, maintenance depots and other areas above the contact wires where fire water pipes, fire sprinklers, water supply and drainage pipelines or overhead equipment areas may form condensate.

[0026] The overhead contact system uses a direct power supply method with a return conductor, and the power supply system is power frequency, single-phase, AC 25kV. The contact system is simply suspended by the contact wire being directly fixed to the corresponding support device. The lower side of the contact wire needs to maintain sliding contact with the pantograph sliding plate, so it cannot be protected by ordinary insulating sheaths that cover the entire circumference of the contact wire.

[0027] In this embodiment, an umbrella-shaped insulating protective canopy is installed above the contact line so that fire sprinkler water, pipeline leaks, condensate, or foreign objects falling from above first come into contact with the umbrella-shaped insulating protective canopy and are then discharged along the umbrella-shaped insulating protective canopy to both sides of the contact line, while keeping the current-receiving working surface below the contact line exposed.

[0028] The system includes an umbrella-shaped insulating protective canopy 100 and a contact wire connection assembly 200. The umbrella-shaped insulating protective canopy 100 is disposed above the contact wire 300 and arranged along the extension direction of the contact wire 300. The umbrella-shaped insulating protective canopy 100 includes a ridge portion 110, a first protective portion 120, and a second protective portion 130. The first protective portion 120 and the second protective portion 130 are respectively connected to both sides of the ridge portion 110 and extend downward from the ridge portion 110 towards both lateral sides of the contact wire 300. The contact wire connection assembly 200 is disposed on the lower side of the umbrella-shaped insulating protective canopy 100, including a plurality of parallel groove clamps 210 spaced apart along the extension direction of the contact wire 300 and connectors 220 corresponding to each parallel groove clamp 210; the parallel groove clamps 210 are detachably connected to the contact wire 300, and each connector 220 is respectively inserted into the corresponding parallel groove clamp 210 and the canopy ridge 110, and the parallel groove clamps 210 are fixedly connected to the lower side of the canopy ridge 110 through the connectors 220.

[0029] Specifically, see Figure 1 The umbrella-shaped insulating protective canopy 100 constitutes the main insulating and shielding component of the device. Its length direction is consistent with the extension direction of the contact wire 300, and its lateral direction is perpendicular to the extension direction of the contact wire 300. The umbrella-shaped insulating protective canopy 100 is located above the contact wire 300 and is offset from the working surface of the contact wire 300 used for pantograph current collection.

[0030] The ridge section 110 is located in the middle of the umbrella-shaped insulating protective canopy 100 and is arranged along the extension direction of the contact line 300. The first protective section 120 and the second protective section 130 are respectively located on the lateral sides of the ridge section 110 and extend obliquely from the ridge section 110 toward the lateral outer side of the contact line 300. In one installation state, the ridge section 110 is located directly above the contact line 300; when the overpass equipment or the main water inlet position is laterally offset relative to the contact line 300, the umbrella-shaped insulating protective canopy 100 is offset relative to the contact line 300, so that the ridge section 110 is closer to the main water inlet position, thereby allowing the first protective section 120 and the second protective section 130 to jointly cover the area that the water flow may reach.

[0031] When a fire sprinkler activates or a leak occurs in the overhead pipes, the water first falls onto the upper surface of the ridge section 110, the first protective section 120, or the second protective section 130. Water falling near the ridge section 110 flows towards the first protective section 120 and the second protective section 130, respectively. Water falling into the first protective section 120 or the second protective section 130 flows along the corresponding protective section towards the outside of the contact wire 300. This reduces the likelihood of water directly falling onto the contact wire 300 and prevents the umbrella-shaped insulating protective canopy 100 from obstructing the working area where the lower side of the contact wire 300 contacts the pantograph contact plate.

[0032] The contact wire connection assembly 200 is located between the umbrella-shaped insulating protective canopy 100 and the contact wire 300. Multiple parallel groove clamps 210 are arranged at intervals along the extension direction of the contact wire 300, creating multiple connection and support positions on the umbrella-shaped insulating protective canopy 100 in the length direction. Each parallel groove clamp 210 is detachably connected to the upper or side portion of the contact wire 300, avoiding the current-collecting working surface on the lower side of the contact wire 300.

[0033] Each connector 220 is respectively inserted into the corresponding parallel groove clamp 210 and the ridge section 110, and the parallel groove clamp 210 is fixedly connected to the lower side of the ridge section 110. The connector 220 can be a mechanical connector capable of inserting and fixing two components, such as a connecting bolt, a pin with a limiting structure, or a riveting component. In this embodiment, the connector 220 is a connecting bolt, and the specific arrangement of the connecting bolt will be further explained later.

[0034] The loads on the umbrella-shaped insulating protective canopy 100, including its own weight, the weight of the water it bears, the impact of the spray, and the vibration loads during operation, are transmitted to the contact wire 300 through the ridge 110, the connectors 220, and the parallel groove clamps 210. Multiple connection points are distributed along the extension direction of the contact wire 300, which reduces localized sagging, end warping, or deflection around the contact wire 300 caused by single-point stress on the umbrella-shaped insulating protective canopy 100.

[0035] During installation, after the contact network is de-energized and tested for voltage and grounding is completed, the installation section of the umbrella-shaped insulating protective canopy 100 is determined according to the location of the overhead equipment. Each parallel groove clamp 210 is detachably connected to the predetermined position of the contact wire 300 in sequence, and the insertion positions of the parallel groove clamp 210 and the canopy ridge 110 are aligned with each other. Then, the corresponding connectors 220 are inserted into the parallel groove clamp 210 and the canopy ridge 110, and the two are fixedly connected.

[0036] After completing the connection, adjust the position of the umbrella-shaped insulating protective canopy 100 so that the ridge 110 extends along the contact line 300, and the first protective part 120 and the second protective part 130 respectively cover the lateral sides of the contact line 300. Check the connection status of each connector 220 and the parallel groove clamp 210, and confirm that the current-receiving working surface under the contact line 300 is not obstructed or damaged. With the above structure, an insulating shielding area can be formed above the contact line 300 without covering the current-receiving working surface of the contact line 300, and the installation stability of the umbrella-shaped insulating protective canopy 100 is improved by multiple parallel groove clamps 210 and connectors 220.

[0037] Based on the overall structure described above, this embodiment further explains the materials and molding structure of the umbrella-shaped insulating protective canopy 100, so that the canopy simultaneously has insulation, flame retardancy, drainage and load-bearing capacity.

[0038] The umbrella-shaped insulated protective canopy 100 is made of insulating and flame-retardant polyethylene material; the ridge 110 extends to both sides to form the first protective part 120 and the second protective part 130, and the ridge 110, the first protective part 120 and the second protective part 130 together constitute an umbrella-shaped canopy surface with a high center and low sides in cross-section.

[0039] Specifically, the umbrella-shaped insulating protective canopy 100 is made of polyethylene material with insulating and flame-retardant properties. The selected material has insulation, flame-retardant, weather-resistant, water-resistant, aging-resistant, and mechanical strength suitable for the operating environment of the contact network, and can withstand temperature and humidity changes, water spray impact, and long-term vibration within the depot. Before manufacturing, the material grade and canopy thickness are determined based on the contact network voltage level, maximum water spray volume, canopy span, allowable deformation, and manufacturing process. The canopy thickness should ensure that the umbrella-shaped insulating protective canopy 100 does not undergo excessive deformation affecting drainage under its own weight, water load, and spray impact, while also avoiding excessive canopy weight that would increase the additional load on the contact wire 300.

[0040] The ridge section 110, the first protective section 120, and the second protective section 130 are formed into an integrated umbrella-shaped canopy using molding, hot bending, injection molding, or sheet metal bending. When sheet metal bending is used, a bending area extending along the length of the sheet is formed in the middle of the insulating flame-retardant polyethylene sheet. This bending area constitutes the ridge section 110, and the sheets on both sides of the bending area constitute the first protective section 120 and the second protective section 130, respectively. When molding or hot bending is used, a molding die adapted to the umbrella-shaped canopy allows the ridge section 110 to smoothly transition to the first protective section 120 and the second protective section 130 on both sides, avoiding the formation of depressions, steps, or water accumulation areas towards the contact line 300 at the connection points.

[0041] The height of the ridge section 110 and the inclination of the first protective section 120 and the second protective section 130 are determined comprehensively based on the on-site installation space, expected sprinkler flow rate, shed width, and pantograph dynamic envelope. After considering manufacturing errors, installation errors, and load deformation, the first protective section 120 and the second protective section 130 still slope outwards from the ridge section 110, without forming a reverse slope from the outside towards the ridge section 110. By extending the ridge section 110 to both sides to form the first protective section 120 and the second protective section 130, the number of parts and shed surface connection gaps can be reduced, allowing water to flow continuously from the center to both sides, and reducing the possibility of leakage or water accumulation at connection points.

[0042] See Figure 2 Based on the above-mentioned umbrella-shaped canopy, this embodiment further provides an upward-turning structure with opposite tilting directions on the outer side of the first protective part 120 and the second protective part 130, and provides multiple drainage channels on the upward-turning structure so that the water flowing to the horizontal sides of the umbrella-shaped canopy is dispersed and discharged through multiple locations.

[0043] The first protective part 120 is connected to a first upper flap 121 on the side away from the ridge part 110, and the second protective part 130 is connected to a second upper flap 131 on the side away from the ridge part 110. The tilt direction of the first upper flap 121 is opposite to the tilt direction of the first protective part 120, and the tilt direction of the second upper flap 131 is opposite to the tilt direction of the second protective part 130. The first upper flap 121 is provided with a plurality of first drainage channels 122, and the second upper flap 131 is provided with a plurality of second drainage channels 132. The plurality of first drainage channels 122 and the plurality of second drainage channels 132 are respectively spaced apart along the extension direction of the contact line 300.

[0044] Specifically, the first upper flap 121 is connected to the side of the first protective part 120 away from the ridge part 110 and is arranged along the extension direction of the contact line 300; the second upper flap 131 is connected to the side of the second protective part 130 away from the ridge part 110 and is arranged along the extension direction of the contact line 300. The first upper flap 121 and the second upper flap 131 are integrally formed or fixedly connected to the corresponding first protective part 120 and second protective part 130, respectively.

[0045] The first protective section 120 slopes downwards from the ridge section 110 toward the contact line 300, and the first upper flap 121 slopes in the opposite direction relative to the first protective section 120; the second protective section 130 slopes downwards from the ridge section 110 toward the other side of the contact line 300, and the second upper flap 131 slopes in the opposite direction relative to the second protective section 130. Thus, the connection area between the first protective section 120 and the first upper flap 121 forms a first water-collecting area along the extension direction of the contact line 300, and the connection area between the second protective section 130 and the second upper flap 131 forms a second water-collecting area along the extension direction of the contact line 300.

[0046] Multiple first drainage channels 122 are arranged sequentially and spaced apart along the length of the first upper flap 121, and each first drainage channel 122 connects the side of the first upper flap 121 facing the first protective part 120 and the side away from the first protective part 120. Multiple second drainage channels 132 are arranged sequentially and spaced apart along the length of the second upper flap 131, and each second drainage channel 132 connects the side of the second upper flap 131 facing the second protective part 130 and the side away from the second protective part 130.

[0047] The first drainage channel 122 and the second drainage channel 132 can be formed by through holes, through grooves, or water passage structures created by corresponding partial notches in the upper flaps. The number, flow dimensions, and spacing between adjacent drainage channels of the first drainage channel 122 and the second drainage channel 132 are determined based on the length of the umbrella-shaped insulating protective canopy 100, the expected water volume, and the drainage capacity of a single drainage channel. Locations with larger water volumes require more drainage channels or larger flow dimensions.

[0048] Water flows laterally from the ridge section 110 along the first protective section 120 and the second protective section 130. Water flowing to the outside of the first protective section 120 is restricted by the first upper flap 121 and enters the first water collection area, then is discharged through multiple first drainage channels 122 spaced apart along the contact line 300. Water flowing to the outside of the second protective section 130 is restricted by the second upper flap 131 and enters the second water collection area, then is discharged through multiple second drainage channels 132. This structure reduces the disorderly dripping of water from the sides of the umbrella-shaped insulating protective canopy 100 or the backflow along the lower surface of the canopy, and allows the water to be dispersed and discharged at multiple locations along the length of the canopy.

[0049] Based on the above-mentioned protective canopy structure, this embodiment further describes the arrangement relationship and connection hole structure of multiple parallel groove clamps 210 and connectors 220, so that the load of the canopy can be distributed and transmitted along the extension direction of the contact line 300.

[0050] Multiple parallel groove clamps 210 are arranged sequentially along the extension direction of the contact line 300, with adjacent parallel groove clamps 210 spaced apart; multiple connectors 220 correspond one-to-one with multiple parallel groove clamps 210, and each parallel groove clamp 210 and the ridge portion 110 are provided with corresponding connection holes, each connector 220 passes through the corresponding connection hole, and fixes the corresponding parallel groove clamp 210 to the lower side of the ridge portion 110.

[0051] Specifically, the number of parallel groove clamps 210 is determined comprehensively based on the length, weight, material rigidity, spray impact load, vehicle running vibration, and the allowable clamping capacity of a single parallel groove clamp 210 of the umbrella-shaped insulating protective canopy 100. When the length of the umbrella-shaped insulating protective canopy 100 is short and the mass is small, two or more parallel groove clamps 210 are used for fixing; when the length of the umbrella-shaped insulating protective canopy 100 increases, the number of parallel groove clamps 210 is increased accordingly, so that the load in the length direction of the canopy is distributed and transferred to the contact wire 300.

[0052] The spacing between adjacent parallel groove clamps 210 is determined based on structural calculations and prototype trial assembly results. In one trial assembly method, the parallel groove clamps 210 are first arranged at a spacing of approximately 500mm. Then, static load, spray, and vibration tests are conducted to check whether the umbrella-shaped insulating protective canopy 100 exhibits sagging, deflection, slippage, or loosening. The clamp spacing is adjusted based on the test results. This spacing is used to illustrate a feasible trial assembly method and does not limit the parallel groove clamps 210 to be set at this fixed spacing.

[0053] Parallel groove clamps 210 located near both ends of the umbrella-shaped insulating protective canopy 100 are used to limit the warping of the canopy ends, while the parallel groove clamp 210 in the middle position is used to bear the weight of the canopy and water load. A distance is maintained between the parallel groove clamps 210 near both ends of the canopy and the canopy ends to prevent excessive overhang deformation. When the center of the sprinkler or the location of concentrated local load is located between two adjacent parallel groove clamps 210, additional parallel groove clamps 210 are added at the corresponding positions, or the installation position of the parallel groove clamps 210 is adjusted.

[0054] Multiple connectors 220 are provided in a one-to-one correspondence with multiple parallel groove clamps 210. Each parallel groove clamp 210 has a connecting hole for the corresponding connector 220 to pass through, and the ridge section 110 also has a connecting hole at the position corresponding to each parallel groove clamp 210. The connecting holes on the parallel groove clamps 210 and the connecting holes on the ridge section 110 are aligned with each other to form a path for the same connector 220 to pass through.

[0055] The diameter of the connecting hole is adapted to the outer diameter of the corresponding connector 220, allowing the connector 220 to pass through the connecting hole while avoiding excessive gaps between the connector 220 and the connecting hole that could affect the stability of the device. Multiple connecting holes are spaced apart along the extension direction of the ridge section 110, and their positions correspond to the installation positions of the parallel groove clamps 210. During installation, first align the connecting holes on the parallel groove clamps 210 with the connecting holes on the ridge section 110, then insert the connector 220 and secure it.

[0056] By providing corresponding connection holes on the parallel groove clamp 210 and the ridge section 110, and using the connector 220 to pass through the connection holes for fixation, the connection position between the parallel groove clamp 210 and the umbrella-shaped insulating protective canopy 100 can be clearly defined, limiting the relative movement of the two along the radial direction of the connection hole. Multiple connection points are distributed along the extension direction of the ridge section 110, which can reduce slippage, rotation, and localized sagging caused by water spray impact and operational vibration.

[0057] Based on the above multi-point connection structure, this embodiment further illustrates the clamping relationship between the groove clamp 210 and the contact wire 300, as well as the connecting bolt, which is a specific structure of the connector 220.

[0058] The parallel groove clamp 210 is provided with a clamping groove that extends along the extension direction of the contact line 300, and the contact line 300 passes through the clamping groove; the connector 220 is a connecting bolt, which passes through the corresponding connecting holes on the parallel groove clamp 210 and the ridge portion 110, and fastens the parallel groove clamp 210 to the ridge portion 110.

[0059] Specifically, the extending direction of the clamping groove is consistent with the extending direction of the contact wire 300, and the inner contour of the clamping groove is adapted to the outer contour of the clamped portion of the contact wire 300. The contact wire 300 has a lower working surface for pantograph sliding contact and non-working areas located on the upper part and sides. The wire clamp 210 forms a detachable clamp with the upper or side non-working area of ​​the contact wire 300 through the clamping groove, avoiding the lower working surface of the contact wire 300 and the dynamic passage area of ​​the pantograph.

[0060] The axial direction of the connecting bolts is aligned with the axial direction of the corresponding connecting holes on the parallel groove clamp 210 and the ridge section 110. During installation, align the connecting holes on the parallel groove clamp 210 with the connecting holes on the ridge section 110, pass the connecting bolts through the corresponding connecting holes in sequence, and then tighten the parallel groove clamp 210 and the ridge section 110 through threaded connection. The tightness of the connecting bolts should meet the connection stability requirements between the parallel groove clamp 210 and the ridge section 110, while avoiding significant crushing or cracking of the insulating flame-retardant polyethylene material around the connecting holes.

[0061] When installing multiple connecting bolts, tighten them in stages, starting from the middle of the umbrella-shaped insulating protective canopy 100 and moving towards both ends, or alternating along its length, to reduce twisting of the umbrella-shaped insulating protective canopy 100 during tightening. The connecting bolts can employ anti-loosening methods adapted to the operating environment of the contact network, ensuring they remain tight under conditions of water spray impact and long-term vibration. After installation, check that the connecting bolts have completely passed through the corresponding connecting holes and verify that there is no obvious loosening at each connection point.

[0062] The clamping force applied by the parallel groove clamp 210 to the contact wire 300 should be greater than the slippage force that may be caused by water spray impact, vibration, and eccentric load of the canopy, while not exceeding the allowable local clamping load of the contact wire 300. By matching the shape of the clamping groove with the contact wire 300, the contact length between the parallel groove clamp 210 and the contact wire 300 can be increased, so that the load is distributed along the extension direction of the contact wire 300; by passing the connecting bolt through the connecting hole on the parallel groove clamp 210 and the canopy ridge 110, the parallel groove clamp 210 can be reliably connected to the umbrella-shaped insulating protective canopy 100.

[0063] Based on the above-mentioned first upper flap 121, second upper flap 131 and drainage channel structure, this embodiment further provides end plates 140 at both ends of the umbrella-shaped insulating protective canopy 100 along the extension direction of the contact line 300, so that both ends of the umbrella-shaped insulating protective canopy 100 form a sealing structure.

[0064] The umbrella-shaped insulating protective canopy 100 has end plates 140 at both ends along the extension direction of the contact line 300. Each end plate 140 extends laterally along the umbrella-shaped insulating protective canopy 100 and is connected to the ends of the ridge 110, the first protective part 120, the second protective part 130, the first upper flip plate 121, and the second upper flip plate 131, respectively.

[0065] Specifically, two end plates 140 are respectively disposed at the two ends of the umbrella-shaped insulating protective canopy 100 along the extension direction of the contact line 300. Each end plate 140 is a short plate arranged laterally along the umbrella-shaped insulating protective canopy 100, the length direction of which intersects the extension direction of the contact line 300, and the lateral range of which extends from the end of the first upper flap 121 to the end of the second upper flap 131.

[0066] The shape of the end plate 140 is adapted to the cross-sectional profile of the corresponding end of the umbrella-shaped insulating protective canopy 100. The middle part of the end plate 140 is connected to the end of the ridge part 110, the portions of the end plate 140 located on both sides of the middle part are connected to the ends of the first protective part 120 and the second protective part 130, respectively, and the lateral sides of the end plate 140 are connected to the ends of the first upper flip plate 121 and the second upper flip plate 131, respectively.

[0067] The two end plates 140 respectively seal the two ends of the first water collection area formed between the first protective part 120 and the first upper flap 121, and respectively seal the two ends of the second water collection area formed between the second protective part 130 and the second upper flap 131, so that both ends of the first water collection area and the second water collection area along the extension direction of the contact line 300 are in a sealed state.

[0068] The end plate 140 is integrally formed or fixedly connected to the ridge section 110, the first protective section 120, the second protective section 130, the first upper flap 121, and the second upper flap 131. When fixedly connected, the end plate 140 is continuously connected to the corresponding end of the umbrella-shaped insulating protective canopy 100, and the connection position does not form a gap through which the water supply flow can directly pass.

[0069] Water flows laterally from the ridge section 110 along the first protective section 120 and the second protective section 130, and enters the first and second water collection areas respectively. Two end plates 140 restrict the water flow from the two ends of the umbrella-shaped insulating protective canopy 100 along the extension direction of the contact line 300, so that the water flows to the adjacent first drainage channel 122 and second drainage channel 132 respectively, and is discharged laterally to the outer side of the umbrella-shaped insulating protective canopy 100 through the first drainage channel 122 and the second drainage channel 132.

[0070] like Figure 3As shown, the second embodiment of the present invention provides a simple suspension insulation protection method for overhead contact lines, used to determine the protection section, structural dimensions, installation position, canopy inclination angle, and arrangement parameters of the parallel trench insulation protection shed device based on the spatial relationship between the overhead risk source and the contact wire 300. This embodiment is implemented according to main steps S10 to S50, and the specific implementation of each main step is further explained through corresponding sub-steps.

[0071] Step S10: Obtain parameters of the upstream risk source, contact wire space parameters, contact wire dynamic displacement parameters, pantograph dynamic envelope, and protective device design parameters.

[0072] Step S20: Determine the contact line risk assessment envelope based on the contact line spatial parameters and the contact line dynamic displacement parameters; determine the risk source expansion influence envelope based on the overpass risk source parameters; and determine the effective risk projection area based on the risk source expansion influence envelope and the contact line risk assessment envelope.

[0073] Step S30: Form a section to be protected based on the effective risk projection area, and generate multiple candidate parameter groups based on the section to be protected, the contact wire risk judgment envelope, the preset drainage safety distance and the design parameters of the protective device. Each candidate parameter group includes the length, width, installation position, roof inclination angle and arrangement parameters of the parallel trench clamps of the umbrella-shaped insulating protective shed.

[0074] Step S40: Determine the drainage path and water landing area of ​​the water flow on the umbrella-shaped insulating protective shed according to each candidate parameter group, and perform drainage safety verification, pantograph dynamic envelope verification and installation stability verification on each candidate parameter group, and retain the candidate parameter groups that meet the verification requirements.

[0075] Step S50: Determine the target parameter group based on the comprehensive safety margin of the retained candidate parameter group, and install the umbrella-type parallel trench insulating protective canopy device on the contact line according to the target parameter group.

[0076] Specifically, step S10 includes steps S11 to S15.

[0077] Step S11: Establish the spatial coordinate system of the line. The longitudinal axis is defined by the extension direction of the contact wire 300. The horizontal axis is defined by the direction perpendicular to the extension direction of the contact line 300. With the vertical direction as the height coordinate axis A spatial coordinate system for the railway line is established. For curved sections, a local coordinate system that varies with the railway line is established along the center trajectory of the contact wire 300, and the parameters in each local coordinate system are transformed to a unified railway coordinate system, so that the parameters of the overpass risk source, contact wire 300, and protective device at different locations can be compared under the same coordinate reference.

[0078] Step S12: Obtain the parameters of the overhead risk source. These parameters include the risk source type, spatial location, external dimensions, height difference between the risk source and the contact line 300, spray direction, spray angle, spray flow rate, leakage direction, positional deviation, and directional deviation. Risk source types include spray water from fire sprinklers, leakage from pipe joints or pipe walls, condensation on equipment surfaces, and falling objects that may be generated by overhead equipment.

[0079] Step S13: Obtain the contact wire spatial parameters and contact wire dynamic displacement parameters. The contact wire spatial parameters include the center trajectory of the contact wire 300, installation height, pull-out value, span, and contact wire tension. The contact wire dynamic displacement parameters include lateral and vertical displacement under the pantograph's action, operational vibration displacement, temperature change displacement, installation error, and position measurement error.

[0080] Step S14: Obtain the pantograph dynamic envelope. The pantograph dynamic envelope represents the spatial range that the pantograph may occupy under the combined effects of maximum lift, maximum lateral sway, vehicle running vibration, and 300° dynamic displacement of the contact wire. The pantograph dynamic envelope is determined based on vehicle and pantograph design data, line clearance data, and on-site inspection results.

[0081] Step S15: Obtain the design parameters of the protective device. The design parameters of the protective device include the material density, elastic modulus, bending strength, effective breakdown field strength, tracking resistance, flame retardant rating, allowable deformation, allowable size range, allowable canopy tilt angle range, clamping capacity of the parallel groove clamp 210, friction conditions between the parallel groove clamp 210 and the contact wire 300, specifications of the connecting bolt 220, allowable additional load on the contact wire 300, allowable additional sag, and available installation space on site.

[0082] Parameters obtainable from engineering drawings, equipment technical documents, and overhead contact line design data can be directly used. When the spray angle, actual spray direction, water flow deviation caused by air disturbance, or leakage diffusion range cannot be reliably obtained, on-site spray or flushing tests should be conducted under overhead contact line power outage conditions. The spray position, spray flow rate, spray direction, coverage area at the predetermined installation height, and maximum water flow deviation location should be recorded, and the maximum coverage area from multiple tests should be used as the basis for risk calculation. Steps S11 to S15 provide a unified and traceable data foundation for subsequent envelope calculation, candidate parameter generation, and various verifications.

[0083] In step S20, the contact wire risk assessment envelope is determined based on the contact wire spatial parameters and contact wire dynamic displacement parameters. Specifically, the center trajectory of the contact wire 300 is spatially superimposed with the possible displacement ranges of the contact wire 300 in the longitudinal, lateral, and vertical directions to obtain the dynamic occupancy area of ​​the contact wire. Outside the dynamic occupancy area, position measurement error, contact wire installation error, and preset safety margin are added to form the contact wire risk assessment envelope. The contact wire risk assessment envelope covers the spatial position that the contact wire 300 may occupy under the combined effects of design pull-out value, pantograph lifting, vehicle running vibration, temperature changes, and installation errors.

[0084] Based on the formation of the contact line risk assessment envelope, this embodiment further illustrates the process of determining the risk source expansion influence envelope, the effective risk projection area, and the section to be protected.

[0085] Based on the location of the upstream risk source, the direction of spraying or leakage, the diffusion range of spraying or leakage, and the height difference between the upstream risk source and the contact line, the theoretical influence envelope of the risk source is determined. The positional deviation of the upstream risk source, the deviation of the spraying or leakage direction, the environmental disturbance offset, and the preset safety margin are superimposed on the theoretical influence envelope to obtain the extended influence envelope of the risk source. The extended influence envelope of the risk source intersects with the installation height plane determined by the design parameters of the protective device to obtain the risk section area. The contact line risk assessment envelope is projected vertically onto the installation height plane to obtain the contact line risk projection area. The intersection area of ​​the risk section area and the contact line risk projection area is determined as the effective risk projection area. Multiple overlapping effective risk projection areas after adding the longitudinal protection margin are merged to obtain the section to be protected.

[0086] See Figure 4 Specifically, step S20 further includes steps S21 to S25.

[0087] Step S21: Determine the theoretical influence envelope of the risk source based on the location of the upstream risk source, the direction of spraying or leakage, the diffusion range of spraying or leakage, and the height difference between the upstream risk source and the contact line 300. When the upstream risk source is a fire sprinkler, the spraying area of ​​the fire sprinkler is represented as a cone-shaped or truncated cone-shaped area with the sprinkler position as the apex and the spraying direction as the axis.

[0088] Let the first The location of each fire sprinkler head is The unit vector of the spray direction is The vertical component of the unit vector is The height of the fire sprinkler head is The planned installation height of the umbrella-shaped insulated protective shed is The distance parameter from the spray axis to the predetermined installation height plane is: ; The intersection of the spray axis and the plane at the predetermined installation height is: ; in, This represents the directional distance parameter from the fire sprinkler head along the sprinkler axis to the plane at the predetermined installation height. This indicates the center position of the sprinkler axis on the plane at the predetermined installation height. When the vertical component of the sprinkler direction cannot make the sprinkler axis reach the plane at the predetermined installation height, it is determined that the fire sprinkler will not directly form the theoretical sprinkler section at the corresponding height under the current sprinkler direction, but whether an extended effect is formed is still determined by combining the sprinkler deflection error and environmental disturbance.

[0089] Let the initial spray radius at the nozzle outlet be... The spray is full angle The theoretical coverage radius of the spray area on the plane at the predetermined installation height is: ; by Centered on, with The theoretical spray cross-section is formed by the radius, and the theoretical spray cross-sections at different heights along the spray path together form the theoretical influence envelope of the risk source. The above formula clarifies the combined effect of the spatial location of the fire sprinkler head, the spray direction, the spray angle, and the installation height on the theoretical influence range.

[0090] When the upstream risk source is a pipe leak or a condensation point, the theoretical influence area when the liquid reaches the predetermined installation height plane is determined based on the leak location, leak direction, historical water stain range, and flushing test results. When the upstream risk source is a linear leak area, the theoretical influence areas of multiple adjacent leak locations are merged. When the upstream risk source is a potentially falling part or foreign object, the theoretical falling object influence envelope is formed based on the projected area of ​​the upstream equipment, the possible detachment location, and the lateral offset during the fall.

[0091] Step S22: The positional deviation across the risk source, the spray or leakage direction deviation, the environmental disturbance offset, and the preset safety margin are superimposed on the theoretical influence envelope of the risk source to obtain the extended influence envelope of the risk source. For fire sprinklers, let the sprinkler installation position deviation be... The spray direction angle deviation is The environmental disturbance offset is The experimental margin is Then the extended spray radius is: ; in, The extended spray radius is taken into account installation deviations, spray direction deviations, air disturbances, and testing uncertainties. The spatial area formed by the extended spray radius constitutes the risk source's extended influence envelope.

[0092] When parameters such as droplet size, initial jet velocity, or air velocity are lacking, the environmental disturbance offset is determined not only by theoretical models but also by measuring the maximum coverage area of ​​the water flow at the predetermined installation height plane through on-site spray tests. The maximum measured coverage area and measurement margin are then used as the risk source's extended influence envelope. If the theoretically calculated range is smaller than the measured maximum coverage area, the measured maximum coverage area shall prevail.

[0093] In a further implementation, the risk level is determined based on the spatial relationship between the theoretical influence envelope of the risk source, the extended influence envelope of the risk source, and the risk assessment envelope of the contact line. When the theoretical influence envelope of the risk source intersects with the risk assessment envelope of the contact line, the corresponding upstream risk source is identified as a high-risk source; when the theoretical influence envelope of the risk source does not intersect with the risk assessment envelope of the contact line, but the extended influence envelope of the risk source intersects with the risk assessment envelope of the contact line, the corresponding upstream risk source is identified as a medium-risk source; when the extended influence envelope of the risk source does not intersect with the risk assessment envelope of the contact line, the corresponding upstream risk source is identified as a low-risk source. High-risk and medium-risk sources are included in subsequent protection parameter calculations, while low-risk sources retain risk records and are periodically reviewed according to operation and maintenance requirements. Through risk classification, deterministic impacts and potential impacts affected by installation deviations and environmental disturbances can be distinguished.

[0094] Step S23: The risk source's extended influence envelope intersects with the installation height plane determined by the protection device's design parameters to obtain the risk section area. The installation height plane is determined jointly based on the height of the contact wire 300, the structural dimensions of the contact wire connection assembly 200, the installation position of the umbrella-shaped insulating protective canopy 100, and the pantograph's dynamic envelope, ensuring that the umbrella-shaped parallel trench insulating protective canopy device is located above the contact wire 300 and does not encroach on the pantograph's dynamic envelope.

[0095] Step S24: Project the contact wire risk assessment envelope vertically onto the installation height plane to obtain the contact wire risk projection area. The contact wire risk projection area represents the lateral and longitudinal danger range of the contact wire 300 corresponding to the installation height plane under the combined effects of dynamic displacement, installation error, and safety margin.

[0096] Step S25: The intersection area of ​​the risk section area and the contact line risk projection area is determined as the effective risk projection area. The effective risk projection area represents the area where the water flow or falling object from the risk source can reach the installation height plane and may also enter the danger zone corresponding to the contact line 300. By extracting the intersection area, areas unrelated to the contact line 300 are excluded from the entire influence range of the risk source, avoiding blindly increasing the size of the protective canopy according to the full coverage area of ​​the fire sprinkler.

[0097] Step S30 specifically includes steps S31 to S36.

[0098] Step S31: Add longitudinal protection margins to both ends of each effective risk projection area, and merge multiple effective risk projection areas that overlap after adding the longitudinal protection margins to obtain the section to be protected. Sort each effective risk projection area along the contact line 300 extension direction. If two adjacent effective risk projection areas overlap after adding the longitudinal protection margins, merge them into the same section to be protected; if they do not overlap, they form independent sections to be protected.

[0099] When applying the protection requirement that the vertical projection of the leak point extends at least 1m to both sides, the protection margin at both ends of each effective risk projection zone should be set to no less than 1m. By merging adjacent effective risk projection zones, redundant protective canopies are reduced, and multiple adjacent fire sprinklers or leak points are covered by continuous protection sections.

[0100] Step S32: Determine the length of the umbrella-shaped insulating protective canopy based on the longitudinal range of the section to be protected. Let the longitudinal starting point of the section to be protected be... The longitudinal endpoint is The longitudinal length of the umbrella-shaped insulating protective canopy is: ; in, This refers to the longitudinal length of the umbrella-shaped insulating protective canopy. Since the section to be protected already includes longitudinal protection margin in step S31, the longitudinal end protection margin will not be added again.

[0101] Step S33: Determine the width and installation location of the umbrella-shaped insulating protective canopy based on the effective risk projection area, the contact wire risk assessment envelope, and the preset drainage safety distance. The combined range of the effective risk projection area and the contact wire risk assessment envelope in the transverse direction is defined as the transverse design range. Let the two boundaries of the transverse design range be... and The lateral coordinate of the connection point between the umbrella-shaped insulating protective canopy and the contact wire is: The preset drainage safety distance is The lateral error in manufacturing and installation is Then the half-width corresponding to the first protective part 120 The half-width corresponding to the second protective part 130 They respectively satisfy: ; ; When using symmetrical canopy structures, the transverse width of the umbrella-shaped insulating protective canopy shall be in accordance with... and The installation location is determined by doubling the larger value. When an asymmetrical canopy is permitted on-site, the two half-widths calculated separately are used directly, ensuring a larger coverage width on the side closer to the main water inflow direction, and that the drainage outlets of both the first drainage channel 122 and the second drainage channel 132 are far from the contact line risk assessment envelope. The installation location is determined based on the center of the effective risk projection area, the position of the contact line 300, and the two half-widths.

[0102] Step S34: Determine the candidate canopy inclination angle, candidate upper flap tilt angle, candidate drainage channel layout parameters, and material thickness based on the design parameters of the protective device. The candidate canopy inclination angle ensures that, after considering manufacturing errors, installation errors, and structural deformation, the first protective part 120 and the second protective part 130 still decrease from the ridge part 110 towards the side where the first upper flap 121 and the second upper flap 131 are located, and the first upper flap 121 and the second upper flap 131 are tilted in opposite directions relative to the corresponding first protective part 120 and second protective part 130, respectively. The material thickness is determined based on the span of the canopy, the elastic modulus of the material, the allowable bending stress, the allowable deformation, and the insulation performance of the material. The mechanical verification of the material thickness adopts a plate or beam calculation model adapted to the actual support conditions of the canopy. When the actual structural boundary is complex, it is verified by finite element analysis or sample loading test, and is not limited to a single conventional beam formula in this embodiment.

[0103] Step S35: Based on the length, weight, expected water volume, spray impact load, vibration load, and clamping capacity of the parallel groove clamps 210 of the umbrella-shaped insulating protective shed, determine the candidate parallel groove clamp arrangement parameters. The parallel groove clamp arrangement parameters include the number of parallel groove clamps 210, the spacing between adjacent parallel groove clamps 210, and the installation position of each parallel groove clamp 210. Initially, parallel groove clamps 210 are installed near both ends of the umbrella-shaped insulating protective shed, with the remaining parallel groove clamps 210 positioned between the two end clamps.

[0104] Step S36 involves combining different umbrella-shaped insulating protective canopy lengths, widths, installation positions, canopy tilt angles, top flap tilt angles, drainage channel layout parameters, material thicknesses, and parallel trench clamp layout parameters to generate multiple candidate parameter groups. When the length of the section to be protected exceeds the length of a single standard canopy, the section to be protected is divided into multiple adjacent modules, ensuring that the module connection positions avoid the main sprinkler center and main leakage locations, and that the module connection positions do not form a return channel towards the contact wire 300. Through steps S31 to S36, multiple candidate parameter groups that meet the basic coverage conditions and can be subsequently verified are formed.

[0105] After obtaining multiple candidate parameter sets, this embodiment further illustrates the process of determining the drainage path, the water flow landing area, and the drainage safety.

[0106] Based on the length, width, and roof inclination angle of the umbrella-shaped insulating protective canopy in the candidate parameter group, as well as the structural deformation parameters and installation deviation parameters in the design parameters of the protective device, the surface height distribution of the umbrella-shaped insulating protective canopy is determined. The surface height distribution is divided into multiple drainage calculation areas, and the water flow in each drainage calculation area is directed to the drainage calculation area with the largest height drop in the adjacent drainage calculation area until the water flow reaches the edge of the umbrella-shaped insulating protective canopy, thus obtaining the drainage path. Based on the drainage path, the water accumulation area, the return path towards the contact line, and the drainage outlet area are determined, and the water flow landing point area is determined based on the drainage outlet area and the preset water flow outward offset. The minimum distance between the water flow landing point area and the contact line risk judgment envelope is calculated, and the candidate parameter group whose minimum distance is not less than the preset drainage safety distance and which does not form the water accumulation area and the return path is retained.

[0107] Specifically, the drainage safety check in step S40 includes steps S41 to S45.

[0108] Step S41: Based on the length, width, and inclination angle of the umbrella-shaped insulating protective canopy in the candidate parameter group, as well as the structural deformation parameters and installation deviation parameters in the protective device design parameters, determine the surface height distribution of the umbrella-shaped insulating protective canopy. For each candidate parameter group, establish the nominal surface height based on the design shape of the umbrella-shaped insulating protective canopy. Based on the structural deformation of the shed under its own weight, the weight of the water it bears, and the impact of the spray. And adverse directional height errors caused by manufacturing and installation. Determine the actual surface height: ; in, Location of the surface of the umbrella-shaped insulating protective canopy The actual surface height after considering load deformation and manufacturing and installation errors. This indicates the position along the direction extending from the contact line 300. This indicates the position of the contact wire in the lateral direction of 300.

[0109] Step S42: Divide the surface height distribution into multiple drainage calculation zones. The drainage calculation zones utilize rectangular grids, triangular grids, or other discrete regions adapted to the shape of the canopy surface. The size of each drainage calculation zone is no larger than half the minimum characteristic dimension of the canopy's drainage structure, ensuring the discrete surface reflects the height changes at the ridge 110, first protective section 120, second protective section 130, first upper flap 121, and second upper flap 131. The areas corresponding to the first drainage channel 122 and the second drainage channel 132 are designated as predetermined drainage outlets. Based on the spray location and spray flow rate, the water entering the umbrella-shaped insulating protective canopy is allocated to the corresponding drainage calculation zones.

[0110] Step S43: The water flow in each drainage calculation area is directed to the drainage calculation area with the largest height drop among adjacent drainage calculation areas until the water flow reaches the edge of the umbrella-shaped insulating protective canopy, thus obtaining a drainage path. For a drainage calculation area that receives water flow, the height difference between this area and each adjacent area is compared, and the water flow is directed to the adjacent area with the largest height drop. After the water flow enters the next drainage calculation area, the same judgment is performed again, and a drainage path is formed by the sequentially connected drainage calculation areas. When two or more adjacent areas have the same maximum height drop, the water flow is allocated according to the available drainage width of the corresponding area.

[0111] Step S44: Determine the water accumulation area, the return path towards the contact line 300, and the drainage outlet area based on the drainage path, and determine the water flow landing point area based on the drainage outlet area and the preset water flow outward offset. If a certain drainage calculation area has no adjacent area with a lower height and is not a predetermined drainage outlet, it is determined as a water accumulation area. When the drainage path points back to the direction of the ridge 110, the parallel groove clamp 210, the connecting bolt 220, or the contact line 300, it is determined as a return path towards the contact line 300. Merge the positions where each drainage path reaches the edge of the umbrella-shaped insulating protective shed to form the drainage outlet area.

[0112] After the water flows away from the edge of the canopy, it may be affected by edge adhesion, airflow, and water droplet scattering. Therefore, a preset water flow outward offset is superimposed on the drainage outlet area to form the water flow landing area. The preset water flow outward offset is determined through on-site water spraying tests, or conservatively determined based on the design airflow velocity, drainage outlet height, and water droplet scattering range. For conditions with large spray flow rates, the actual drainage capacity of the canopy surface is verified through physical sample water spraying tests. The water film thickness formula is no longer used as the sole criterion for judgment to avoid mismatch between the theoretical film flow model and the actual spraying conditions.

[0113] Step S45: Calculate the minimum distance between the water flow landing area and the contact line risk assessment envelope, and perform a drainage safety check. Let the water flow landing area be... The contact wire risk assessment envelope is Then the minimum distance between the two is: ; in, This represents the minimum spatial distance between the water flow landing area and the risk assessment envelope of the contact line. For any point in the region where the water falls, This refers to any point within the contact line risk assessment envelope. Since the outflow offset has already been added when the water flow landing area is formed in step S44, the offset margin will not be deducted again in this formula.

[0114] when If the minimum drainage safety distance is not less than the preset safe drainage distance, no water accumulation area forms on the canopy surface, and no backflow path forms towards the contact line 300, the corresponding candidate parameter group is deemed to have passed the drainage safety check. If the minimum distance is insufficient, increase the canopy width, adjust the installation position, or increase the canopy surface inclination angle; if there is a water accumulation area, adjust the canopy surface shape, increase the local height, or reduce the spacing between adjacent parallel drainage clamps 210; if there is a backflow path, adjust the canopy surface slope or make the parallel drainage clamps 210 and connecting bolts 220 avoid the main drainage path. By incorporating the canopy surface geometry, structural deformation, installation errors, and water leakage into the above drainage calculations, insufficient drainage distance, water accumulation, and backflow problems can be identified before the device is installed.

[0115] After completing the drainage safety verification, this embodiment further illustrates the pantograph dynamic envelope verification, installation stability verification, target parameter group selection, and installation feedback process.

[0116] The minimum distance between the umbrella-shaped parallel trench insulating protective canopy device and the pantograph's dynamic envelope is determined, and the pantograph's dynamic envelope is checked based on the minimum distance. The installation load is determined based on the umbrella-shaped insulating protective canopy's self-weight, water carrying capacity, spray impact load, and vibration load. The anti-slip capability of the parallel trench clamp and the structural deformation of the umbrella-shaped insulating protective canopy are checked based on the installation load, the clamping capacity of the parallel trench clamp, and the allowable additional load on the contact wire. Based on the results of the drainage safety check, the pantograph's dynamic envelope check, and the installation stability check, the following are determined: The minimum value among the corresponding safety margins of each candidate parameter group is determined as the comprehensive safety margin, and the target parameter group is determined from the candidate parameter group whose comprehensive safety margin meets the preset safety requirements. After installing the umbrella-shaped parallel trench insulating protective shed device, the actual water flow landing area, the actual minimum distance between the umbrella-shaped parallel trench insulating protective shed device and the pantograph dynamic envelope, and the actual displacement state of the parallel trench clamp are obtained. When any of the obtained results does not meet the corresponding preset safety requirements, the design parameters of the protective device are updated according to the obtained results, and the target parameter group is re-determined.

[0117] See Figure 5 Step S40 includes steps S46 to S49, and step S50 includes steps S51 to S55.

[0118] Step S46: Determine the minimum distance between the umbrella-shaped parallel trench insulating protective canopy device and the pantograph's dynamic envelope, and perform pantograph dynamic envelope verification based on the minimum distance. Calculate the spatial distance between the outer contours of the umbrella-shaped insulating protective canopy body 100, the parallel trench clamp 210, and the connecting bolt 220 corresponding to the candidate parameter group and the pantograph's dynamic envelope to determine the minimum distance between them. When the minimum distance is not less than the preset mechanical safety distance, the candidate parameter group is deemed to meet the pantograph dynamic envelope verification requirements; when the minimum distance is less than the preset mechanical safety distance, adjust the installation height, width, edge position of the umbrella-shaped insulating protective canopy, or the installation position of the parallel trench clamp 210.

[0119] In a further embodiment, an electrical safety check is performed after step S46. The parallel groove clamp 210, connecting bolt 220, and other metal parts at the same potential as the contact wire 300 are taken as the live profile. The minimum air distance between the live profile and the fire protection pipeline, building structure, grounding equipment, and other non-live structures is calculated, and the minimum air distance is compared with the minimum electrical clearance required for the corresponding power supply voltage level.

[0120] Determine the shortest surface path along the surface of the umbrella-shaped insulating protective canopy from the live metal component to the drainage edge, mounting hole, and areas prone to water accumulation, and use this as the effective creepage path. The effective creepage path must be no less than the preset minimum creepage distance. The material thickness is initially checked based on the maximum verification voltage, the material's effective breakdown field strength, and the electrical safety factor, while simultaneously meeting the requirements for mechanical strength, resistance to tracking, and manufacturing processes. The above electrical safety check is a further safety verification method and does not change the main flow of steps S10 to S50.

[0121] Step S47: Determine the installation load based on the self-weight of the umbrella-shaped insulating protective canopy, the water volume it can withstand, the spray impact load, and the vibration load. The installation load also includes airflow loads caused by vehicle movement and maintenance disturbance loads. The spray impact load is determined based on the spray flow rate, the velocity of the water reaching the canopy surface, and the spray direction, and is decomposed into longitudinal, transverse, and vertical loads. The vehicle movement airflow load is determined based on the windward projected area of ​​the canopy, the aerodynamic drag coefficient corresponding to the canopy's shape, and the design airflow velocity. The above load calculations are based on mature fluid momentum and aerodynamic force calculations and are not limited to specific conventional formulas; when on-site parameters are uncertain, unfavorable loads are determined through spray impact tests and vibration tests.

[0122] Step S48: Based on the installation load, the clamping capacity of the parallel groove clamp 210, and the allowable additional load of the contact wire 300, the installation stability of the anti-slip capability of the parallel groove clamp 210 and the structural deformation of the umbrella-shaped insulation protective canopy is checked.

[0123] Determine the resultant force that may cause the device to slip along the contact line 300 and the total rotational torque that causes the device to rotate around the contact line 300 based on the total installation load. Determine the total anti-slip capability and total anti-rotation capability formed by multiple parallel groove clamps 210 based on the number of parallel groove clamps 210, the normal clamping force of a single parallel groove clamp 210, the friction conditions between the parallel groove clamp 210 and the contact line 300, and the equivalent anti-rotation force arm. The total anti-slip capability is not less than the slip force considering a safety factor, and the total anti-rotation capability is not less than the total rotational torque considering a safety factor.

[0124] The contact pressure is determined based on the normal clamping force of a single parallel groove clamp 210 and the effective contact area between the parallel groove clamp 210 and the contact wire 300. The contact pressure should not exceed the allowable contact pressure of the contact wire 300 to avoid damaging the contact wire 300 by excessively increasing the clamping force. The tightening torque of the connecting bolt 220 is determined based on the required clamping force, the specifications of the connecting bolt 220, and the corresponding torque coefficient, and is controlled using a torque tool during installation.

[0125] The umbrella-shaped insulating protective canopy between adjacent parallel cable clamps 210 is used as the load-bearing support section. The maximum deformation and maximum bending stress are determined based on the design load per unit length, the spacing between adjacent parallel cable clamps 210, the material's elastic modulus, and the canopy's cross-sectional parameters. The maximum deformation is less than the canopy's allowable deformation, and the maximum deformation, combined with installation errors, should not cause a reverse slope in the first protective section 120 or the second protective section 130; the maximum bending stress is less than the material's allowable stress. When the canopy is a plate-like structure with complex boundary conditions, a plate-shell model or finite element model consistent with the actual support position is used for verification.

[0126] The final quantity of parallel groove clamps 210 is determined by the combined length of the protective canopy, the maximum allowable clamp spacing, the total installation load, and the total rotational torque. Let the length of the protective canopy be... The maximum clamp spacing that meets the strength and deformation requirements of the shed structure is The total design load is The design load that a single parallel groove clamp 210 can withstand is The total torque is The maximum torque that a single parallel groove clamp 210 can withstand is... The number of parallel groove clamps 210 is: ; in, The number of parallel groove clamps 210, The formula indicates rounding up. This formula ensures that the number of parallel groove clamps 210 simultaneously meets the requirements of at least two-point fixing, spacing limitation, load bearing, and anti-rotation. Parallel groove clamps 210 are installed near both ends of the umbrella-shaped insulating protective canopy 100, with the remaining parallel groove clamps 210 arranged between the two end clamps. When the spray impact center, module connection location, or local load concentration location is located between two adjacent parallel groove clamps 210, additional parallel groove clamps 210 are added at the corresponding location, or the clamp positions are adjusted.

[0127] The additional sag of the contact wire caused by the installation of the device is determined based on the added mass of the canopy, the concentrated load of the parallel groove clamp 210, the span of the contact wire 300, and the contact wire tension. This calculation uses a sag model applicable to tensioned contact wires in catenary design. The additional sag is less than the allowable adjustment range of the contact wire height, and the contact relationship between the pantograph and the contact wire 300 does not exceed the allowable range. If the additional sag is too large, the canopy mass can be reduced, the length of a single canopy can be shortened, or the continuous protection section can be divided into multiple independent modules. Since the support conditions and tension compensation methods of the contact wire vary with the line design, this embodiment does not limit itself to a single conventional sag formula.

[0128] Step S49: Based on the results of drainage safety verification, pantograph dynamic envelope verification, and installation stability verification, retain candidate parameter groups that simultaneously meet all verification requirements. Candidate parameter groups that do not meet any verification requirement are not included in the target parameter group screening. Through steps S46 to S49, candidate schemes that intrude into the pantograph operating space, have insufficient fixing capacity, excessive canopy deformation, or excessive additional load on the contact wire are eliminated.

[0129] Step S50 specifically includes steps S51 to S55.

[0130] Step S51: Based on the results of drainage safety verification, pantograph dynamic envelope verification, and installation stability verification, determine the corresponding safety margin for each candidate parameter group. For verification items requiring actual values ​​to be no less than specified values, the ratio of the actual value to the specified value is used as the corresponding safety margin; for verification items requiring actual values ​​to be no greater than specified values, the ratio of the specified value to the actual value is used as the corresponding safety margin.

[0131] The corresponding safety margins include drainage safety margin, pantograph mechanical safety margin, anti-slip margin, anti-rotation margin, shed structure deformation margin, and contact wire additional sag margin. During electrical safety verification, clearance margin and creepage distance margin are also determined and used as additional evaluation quantities.

[0132] Step S52: Determine the minimum value among the corresponding safety margins of the same candidate parameter group as the comprehensive safety margin. Let the first... The corresponding safety margins for each of the candidate parameter groups are as follows: , to ,in To determine the number of verification items participating in the evaluation, the first... The overall safety margin for each candidate parameter group is: ; in, For the first The overall safety margin of a candidate parameter group. The overall safety margin reflects the safety level of the weakest check item in the candidate parameter group, preventing a large margin in one check item from masking the fact that another check item does not meet the requirements.

[0133] Step S53: Determine the target parameter group from the candidate parameter groups whose comprehensive safety margin meets the preset safety requirements. Prioritize the candidate parameter group with the largest comprehensive safety margin. When the difference in comprehensive safety margin among multiple candidate parameter groups is within a preset equivalent range, compare the total mass of the canopy, the number of parallel cable clamps 210, the number of canopy modules, and the on-site installation space occupancy in sequence. Select the candidate parameter group with the smaller total mass, fewer parallel cable clamps 210, fewer module connections, and easier on-site installation as the target parameter group.

[0134] If no candidate parameter set exists that meets the preset safety requirements in terms of overall safety margin, directional adjustments are performed based on the verification items that do not meet the requirements. If the drainage safety distance is insufficient, increase the canopy width, adjust the installation position, or change the canopy inclination angle; if there is water accumulation or backflow, adjust the canopy slope, increase the local height, or add support positions; if it intrudes into the pantograph's dynamic envelope, adjust the installation height, the canopy edge position, or the position of the parallel groove clamp 210; if the anti-slip or anti-rotation capacity is insufficient, increase the number of parallel groove clamps 210, reduce the clamp spacing, or adjust the clamping force within the allowable range of the contact wire 300; if the canopy deformation is excessive, increase the material thickness or reduce the clamp spacing; if the contact wire additional sag is excessive, reduce the canopy mass or divide the continuous canopy into multiple shorter modules. After completing the adjustments, return to step S30, regenerate the candidate parameter set, and perform subsequent verification.

[0135] Step S54: Install the umbrella-shaped parallel trench insulating protective canopy device on the contact wire 300 according to the target parameter set, and obtain the actual water flow landing area, the actual minimum distance between the umbrella-shaped parallel trench insulating protective canopy device and the pantograph dynamic envelope, and the actual displacement state of the parallel trench clamp 210.

[0136] After installation, measure the actual length, actual width, roof tilt angle, installation position, tilt state of the first upper flap 121 and the second upper flap 131, position and flow size of the first drainage channel 122 and the second drainage channel 132, installation position of the parallel groove clamp 210, spacing between adjacent parallel groove clamps 210 and tightening parameters of the connecting bolts 220, and compare them with the target parameter set.

[0137] Perform flushing verification using the maximum design flow rate across the risk source or the approved simulated sprinkler flow rate. Record the actual drainage path, water accumulation location, backflow, drainage outlet area, and actual water landing area on the roof. Measure the minimum distance between the actual water landing area and the contact line 300°. When reliable theoretical sprinkler parameters are unavailable on-site, flushing verification is also used to correct for the risk source expansion effect envelope and water outflow offset.

[0138] The pantograph dynamic envelope detection template, clearance detection device, or approved low-speed pantograph is used to test whether the umbrella-shaped insulating protective canopy 100, parallel groove clamp 210, and connecting bolt 220 encroach on the pantograph's dynamic envelope, and the actual minimum distance between the device and the pantograph's dynamic envelope is measured. After completing the spraying, vibration, or specified operating cycle, the position and tightness of the parallel groove clamp 210 and connecting bolt 220 are checked, and the actual displacement state of the parallel groove clamp 210 is determined based on the positional difference before and after installation.

[0139] Step S55: If any of the acquisition results of the actual water flow landing area, the actual minimum spacing, and the actual displacement state of the parallel trench clamp 210 do not meet the corresponding preset safety requirements, update the design parameters of the protection device according to the acquisition results, and return to step S30 to redetermine the target parameter group.

[0140] If the distance between the actual water flow landing area and the contact line 300 is insufficient, update the water flow outflow offset, canopy width parameters, or canopy tilt angle parameters; if the actual minimum spacing is insufficient, update the installation deviation parameters or pantograph dynamic envelope; if the parallel groove clamp 210 slips or rotates, update the clamping capacity, friction conditions, clamp spacing, or design load of the parallel groove clamp 210. Regenerate the candidate parameter group based on the updated protective device design parameters, and re-execute steps S30 to S55.

[0141] When the water flow is stably discharged to both sides of the contact wire 300, there is no water accumulation or backflow on the canopy surface, the distance between the water flow landing point and the contact wire 300 meets the requirements, the device does not intrude into the dynamic envelope of the pantograph, the parallel groove clamp 210 does not become loose or exceed the allowable displacement, and the additional sag of the contact wire meets the operating requirements, the installation of the umbrella-type parallel groove insulating protective canopy device is deemed qualified.

[0142] After successful installation, a design and acceptance record is generated, including the location of the risk source, risk source type, risk level, effective risk projection area, section to be protected, canopy dimensions, canopy inclination angle, installation location, number and spacing of parallel cable clamps 210, tightness of connecting bolts 220, water flushing verification results, pantograph dynamic envelope verification results, and displacement detection results of parallel cable clamps 210. Through steps S51 to S55, the design parameters of the protective device are corrected using the on-site measurement results, so that the protective design forms a complete closed loop from risk identification, parameter calculation, candidate scheme verification, on-site installation, verification to parameter write-back.

[0143] The terms “first”, “second”, etc., are used to distinguish similar objects, not to describe or indicate a specific order or sequence.

[0144] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0145] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A parapet-type umbrella-shaped insulating protective canopy device for contact wires, characterized in that, Includes an umbrella-shaped insulating protective canopy (100) and a contact wire connection assembly (200); The umbrella-shaped insulating protective canopy (100) is positioned above the contact line (300) and is arranged along the extension direction of the contact line (300); The umbrella-shaped insulating protective canopy (100) includes a ridge section (110), a first protective section (120), and a second protective section (130). The first protective section (120) and the second protective section (130) are respectively connected to both sides of the ridge section (110) and extend downward from the ridge section (110) to both sides of the contact line (300). The contact wire connection assembly (200) is disposed on the lower side of the umbrella-shaped insulating protective canopy (100), and includes a plurality of parallel groove clamps (210) spaced apart along the extension direction of the contact wire (300) and connectors (220) corresponding to each of the parallel groove clamps (210). The parallel groove clamp (210) is detachably connected to the contact line (300), and each of the connectors (220) is respectively inserted into the corresponding parallel groove clamp (210) and the ridge part (110). The parallel groove clamp (210) is fixedly connected to the lower side of the ridge part (110) through the connector (220).

2. The umbrella-shaped parallel trench insulating protective canopy device for contact wires according to claim 1, characterized in that, The umbrella-shaped insulated protective canopy (100) is made of insulated flame-retardant polyethylene material; The ridge section (110) extends to both sides to form the first protective section (120) and the second protective section (130), and the ridge section (110), the first protective section (120) and the second protective section (130) together constitute an umbrella-shaped canopy surface with a high center and low sides in cross-section.

3. The umbrella-shaped parallel trench insulating protective canopy device for contact wires according to claim 1, characterized in that, The first protective part (120) is connected to a first upper flap (121) on the side away from the ridge part (110), and the second protective part (130) is connected to a second upper flap (131) on the side away from the ridge part (110). The tilting direction of the first upper flap (121) is opposite to the tilting direction of the first protective part (120), and the tilting direction of the second upper flap (131) is opposite to the tilting direction of the second protective part (130); The first upper flap (121) is provided with a plurality of first drainage channels (122), and the second upper flap (131) is provided with a plurality of second drainage channels (132). The plurality of first drainage channels (122) and the plurality of second drainage channels (132) are respectively arranged at intervals along the extension direction of the contact line (300).

4. The umbrella-shaped parallel trench insulating protective canopy device for contact wires according to claim 1, characterized in that, Multiple parallel groove clamps (210) are arranged sequentially along the extension direction of the contact line (300), with adjacent parallel groove clamps (210) spaced apart; Each of the connectors (220) corresponds to one of the parallel groove clamps (210). The parallel groove clamps (210) and the ridge section (110) are respectively provided with corresponding connection holes. Each connector (220) passes through the corresponding connection hole and fixes the corresponding parallel groove clamp (210) to the lower side of the ridge section (110).

5. The umbrella-shaped parallel trench insulating protective canopy device for contact wires according to claim 4, characterized in that, The parallel groove clamp (210) is provided with a clamping groove that extends along the extension direction of the contact line (300), and the contact line (300) passes through the clamping groove. The connector (220) is a connecting bolt, which passes through the corresponding connecting holes on the parallel groove clamp (210) and the ridge section (110) and securely connects the parallel groove clamp (210) to the ridge section (110).

6. The umbrella-shaped parallel trench insulating protective canopy device for contact wires according to claim 3, characterized in that, The umbrella-shaped insulating protective canopy (100) has end plates (140) at both ends along the extension direction of the contact line (300). Each end plate (140) extends laterally along the umbrella-shaped insulating protective canopy (100) and is connected to the ends of the ridge (110), the first protective part (120), the second protective part (130), the first upper flip plate (121), and the second upper flip plate (131), respectively.

7. A simple method for suspending and insulating overhead contact lines, characterized in that, include: Obtain parameters of the risk source above, contact wire spatial parameters, contact wire dynamic displacement parameters, pantograph dynamic envelope, and protective device design parameters; The contact line risk assessment envelope is determined based on the contact line spatial parameters and the contact line dynamic displacement parameters. The risk source expansion influence envelope is determined based on the overpass risk source parameters. The effective risk projection area is determined based on the risk source expansion influence envelope and the contact line risk assessment envelope. The protected section is formed according to the effective risk projection area, and multiple candidate parameter groups are generated according to the protected section, the contact wire risk judgment envelope, the preset drainage safety distance and the design parameters of the protective device. Each candidate parameter group includes the length, width, installation position, roof inclination angle and arrangement parameters of the parallel trench clamps of the umbrella-shaped insulating protective shed. Based on each candidate parameter group, the drainage path and water landing area of ​​the water flow on the umbrella-shaped insulating protective shed are determined, and drainage safety verification, pantograph dynamic envelope verification and installation stability verification are performed on each candidate parameter group. Candidate parameter groups that meet the verification requirements are retained. The target parameter set is determined based on the comprehensive safety margin of the retained candidate parameter set, and an umbrella-type parallel trench insulating protective canopy device is installed on the contact line according to the target parameter set.

8. The simple suspension insulation protection method for overhead contact lines according to claim 7, characterized in that, Determining the effective risk projection area and forming the protected section includes: Based on the location of the risk source, the direction of spraying or leakage, the diffusion range of spraying or leakage, and the height difference between the risk source and the contact line, the theoretical influence envelope of the risk source is determined. The risk source extended influence envelope is obtained by superimposing the positional deviation of the upstream risk source, the spray or leakage direction deviation, the environmental disturbance offset, and the preset safety margin onto the theoretical influence envelope of the risk source. The risk source extended influence envelope intersects with the installation height plane determined by the design parameters of the protective device to obtain the risk section area, and the contact line risk judgment envelope is projected vertically onto the installation height plane to obtain the contact line risk projection area; The area where the risk section area intersects with the contact line risk projection area is determined as the effective risk projection area, and multiple effective risk projection areas that overlap after adding longitudinal protection margin are merged to obtain the section to be protected.

9. The simple suspension insulation protection method for overhead contact lines according to claim 7, characterized in that, Determining the drainage path and the water flow landing area, and performing the drainage safety check, includes: The surface height distribution of the umbrella-shaped insulating protective shed is determined based on the length, width, and shed surface inclination angle of the candidate parameter group, as well as the structural deformation parameters and installation deviation parameters in the design parameters of the protective device. The surface height distribution is divided into multiple drainage calculation areas, and the water flow in each drainage calculation area is directed to the drainage calculation area with the largest height drop in the adjacent drainage calculation area until the water flow reaches the edge of the umbrella-shaped insulating protective shed, thus obtaining the drainage path. The water accumulation area, the return path towards the contact line, and the drainage outlet area are determined according to the drainage path, and the water flow landing point area is determined according to the drainage outlet area and the preset water flow outward offset. Calculate the minimum distance between the water flow landing area and the contact line risk assessment envelope, and retain the candidate parameter group whose minimum distance is not less than the preset drainage safety distance and which has not formed the water accumulation area and the return path.

10. The simple suspension insulation protection method for overhead contact lines according to claim 9, characterized in that, Performing the pantograph dynamic envelope verification and the installation stability verification, and determining the target parameter set, includes: Determine the minimum distance between the umbrella-shaped parallel trench insulating protective canopy device and the pantograph dynamic envelope, and verify the pantograph dynamic envelope based on the minimum distance; The installation load is determined based on the self-weight, water capacity, spray impact load, and vibration load of the umbrella-shaped insulating protective shed. Based on the installation load, the clamping capacity of the parallel groove clamp, and the allowable additional load of the contact wire, the installation stability is checked for the anti-slip capability of the parallel groove clamp and the structural deformation of the umbrella-shaped insulating protective shed. Based on the results of the drainage safety verification, the pantograph dynamic envelope verification and the installation stability verification, the corresponding safety margin of each candidate parameter group is determined, the minimum value of each corresponding safety margin is determined as the comprehensive safety margin, and the target parameter group is determined from the candidate parameter group whose comprehensive safety margin meets the preset safety requirements. After installing the umbrella-shaped parallel trench insulating protective canopy device, the actual water flow landing area, the actual minimum distance between the umbrella-shaped parallel trench insulating protective canopy device and the pantograph dynamic envelope, and the actual displacement state of the parallel trench clamp are obtained. When any of the obtained results does not meet the corresponding preset safety requirements, the design parameters of the protective device are updated according to the obtained results, and the target parameter group is re-determined.

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