Catenary deicing device, maintenance vehicle and catenary deicing method

Abstract

The invention provides an overhead line system deicing device, a maintenance vehicle and an overhead line system deicing method. The catenary deicing device comprises a base body, a support connected to the upper end of the base body and rollers rotationally arranged at the two ends of the support in the X direction, n hobbing teeth are arranged on the circumference of each roller, n is an odd number larger than or equal to 3, and the base body is used for enabling the rollers to move up and down so that the rollers can be kept at the positions where the hobbing teeth can make contact with a catenary. The two rollers are arranged in tandem and make contact with the lower surface of the contact network in a rolling mode, the rollers are provided with the hobbing teeth with the odd number larger than 3 in the circumferential direction, the combined deicing mode of beating and cutting-in can be well achieved, contact line icing caused by freezing rain is removed, and potential safety hazards caused by manual knocking are avoided.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to a contact network deicing device, a maintenance vehicle and a contact network deicing method. Background Art

[0002] In recent years, with the frequent occurrence of extreme weather (such as freezing rain), the impact on the railway contact network is relatively large. Freezing rain will form ice packs, icicles and other frozen shapes on the contact line of the contact network. When the pantographs of running locomotives and EMUs encounter such freezing conditions, it will cause arcing, poor current collection, pantograph scraping, pantograph slide breakage and other accidents, which are extremely harmful to safe driving.

[0003] At present, the main methods for removing icicles on the contact wire of the contact network are manual deicing, high-current thermal ice melting and mechanical deicing. The specific method of manual deicing is: cut off the power supply in this section, let the workers climb on the roof of the vehicle and squat, while driving slowly (the speed is about 10km / h), and generally let the workers use wooden sticks to knock the ice, icicles and other coverings on the contact wire. Manual knocking deicing consumes manpower and is extremely inefficient. In addition, since the workers work on the top of the moving vehicle, it is dangerous to the personal safety of the workers.

[0004] High current thermal ice melting, such as a tram contact network deicing device disclosed in the existing patent announcement number CN216215776U, drives the movable block to rotate through a motor, and the movable block is clamped on the top of the fixed block. The heating pipe inside the movable block and the fixed block will melt the ice and snow on the surface of the contact network line to play a deicing role. The cost is relatively high.

[0005] Mechanical deicing, such as the contact network deicing device and contact network deicing vehicle disclosed in the existing patent announcement number CN113765038B, uses a knocking device to knock the ice on the contact line surface to remove ice blocks on the contact line surface. However, ice packs and icicles formed by freezing rain cannot be completely removed by knocking alone. Summary of the invention

[0006] The object of the present invention is to provide a contact network deicing device, a maintenance vehicle and a contact network deicing method, which combine multiple deicing methods to effectively remove the ice layer generated by freezing rain on the contact network.

[0007] The technical solution of the present invention is: a contact network deicing device, including a base, a bracket connected to the upper end of the base, and a roller rotatably arranged at both ends of the bracket in the X direction, the roller is circumferentially provided with n rolling teeth, n is an odd number ≥3, and the base is used to move the roller up and down to maintain a position where the rolling teeth can contact the contact network.

[0008] In the above scheme, two rollers are arranged one in front and one behind to contact the lower surface of the contact network in a rolling manner, and an odd number of rolling teeth greater than 3 are arranged on the rollers in a circumferential manner, so that a combined deicing method of knocking and cutting can be well implemented to remove ice on the contact line caused by freezing rain, avoiding the safety hazards caused by manual knocking. The base body is a foldable structure, similar to the swing arm structure of a single-arm pantograph.

[0009] Preferably, a first roller is provided at one end of the bracket in the X direction, and a second roller is provided at the other end of the bracket in the X direction, the first roller has n1 hobbing teeth, and the second roller has n2 hobbing teeth, where n1<n2. Two rollers with different numbers of hobbing teeth are designed so that the rollers hit different positions of the contact line at different frequencies, thereby increasing the efficiency of deicing.

[0010] Preferably, there is an angle α between the two sides forming the hobbing thickness, and α is an acute angle, so as to ensure pressure damage to the ice layer.

[0011] Preferably, the diameter of the roller is 80 mm; the tooth top width of the hobbing gear is ≥7 mm, and the tooth height is ≥7 mm. The structure of the hobbing gear is optimized so that it does not cause damage to the contact network surface when breaking ice.

[0012] Preferably, the contact network deicing device further comprises a deicing shovel provided on the bracket, and the deicing shovel is located between the two rollers. A push shovel is integrated into the deicing method of knocking, cutting and rolling to remove ice lumps that the front rollers have failed to remove, and effectively remove the solid ice layer on the surface of the contact network caused by freezing rain.

[0013] Preferably, the de-icing shovel comprises a connecting column connected to the bracket and a shovel plate arranged on the top of the connecting column, and the shovel plate is provided with a plurality of shovel teeth arranged at both ends of the X direction. The de-icing shovel has tooth-shaped shovel teeth, which can push and shovel the ice lumps that cause the front roller to bounce, and remove the ice layer condensed on the surface of the contact network.

[0014] Preferably, the thickness of the shovel plate is ≥5mm, the width of the shovel plate in the X direction is ≥70mm; the two sides forming the thickness of the shovel teeth have an angle β, β is a right angle or an obtuse angle; the tooth pitch of the shovel teeth is ≥20mm. The above-mentioned structure of the shovel plate and shovel teeth can ensure the strength of the deicing shovel when deicing.

[0015] Preferably, the roller and de-icing shovel are made of materials with lower strength than the contact line, such as EN AW-1080A series aluminum alloy materials or other composite materials, to ensure that the contact line is not damaged during the de-icing process; after the roller is worn out after working for a period of time, it can be replaced to maintain its appearance and ensure de-icing efficiency.

[0016] Preferably, the two ends of the roller extending in the Y direction are provided with horns, and the Y direction and the X direction are perpendicular to each other on the same top projection plane. The horns effectively prevent the contact network from accidentally falling out of the working width W and falling out of the deicing device, thus avoiding scraping accidents. The present invention also provides a maintenance vehicle, comprising a vehicle body and the above-mentioned contact network deicing device, wherein the contact network deicing device base is installed on the top of the vehicle body. During the movement of the maintenance vehicle, the contact network deicing device can automatically de-ice by following the movement, so that the contact network deicing device itself does not need to be powered by a power source, and does not require personnel to operate on the roof of the vehicle, thus completely solving the problem of personal safety.

[0017] The present invention also provides a method for deicing a contact network using the above-mentioned maintenance vehicle, comprising: The substrate is started so that the hobbing teeth on the roller come into contact with the contact line; The maintenance vehicle is started to move forward in the X direction. At this time, the roller in contact with the contact line rotates adaptively; the rollers on the front end of the roller in the X direction hit and cut into the ice on the contact line to knock it off or crack and loosen the ice layer; the rollers on the rear end of the roller in the X direction remove the remaining ice layer by hitting and rolling.

[0018] Compared with the related art, the present invention has the following beneficial effects: 1. The present invention arranges two rollers one in front and one behind to contact the lower surface of the contact network in a rolling manner, and an odd number of rolling teeth greater than 3 are arranged on the roller in a circumferential manner, so as to better realize the combined deicing method of knocking, cutting and rolling, remove ice on the contact line caused by freezing rain, and avoid the safety hazards caused by manual knocking; Second, the contact network deicing device can be carried on a maintenance vehicle, and as the vehicle moves, the ice on the contact network along the way can be automatically removed, so that the contact network deicing device itself does not need to be powered by a power source; 3. Add a de-icing shovel with shovel teeth, and integrate a push shovel into the de-icing method of knocking, cutting and rolling to remove ice lumps that the front roller cannot remove, and effectively remove the solid ice layer on the surface of the contact network caused by freezing rain; Fourth, horns are set at both ends of the drum, which effectively prevent the contact network from accidentally falling out of the working width W and falling out of the deicing device to avoid scraping accidents; 5. The contact network de-icing device can automatically de-ice the vehicle through the operation of the maintenance vehicle. No personnel are required to work on the roof, which completely solves the problem of personal safety. At the same time, the de-icing device itself does not need to be powered. As the maintenance vehicle moves at a faster speed (30km / h), the de-icing efficiency is greatly increased, shortening the downtime caused by freezing disasters and ensuring that subsequent locomotives can pass normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A schematic diagram of the structure of the contact network deicing device provided by the present invention; Figure 2 for Figure 1 K-direction schematic diagram in ; Figure 3 for Figure 1 The M-direction schematic diagram in FIG. Figure 4 for Figure 1 An enlarged schematic diagram of position I in FIG. Figure 5 A schematic diagram of the position between the contact network deicing device provided by the present invention and the contact network.

[0020] In the accompanying drawings: 1, base; 2, first roller; 3, de-icing shovel; 31, connecting column; 32, shovel plate; 33, shovel teeth; 4, second roller; 5, horn; 6, bracket; 7, roller; 71, rolling gear; 10, contact line. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0022] Embodiment 1 like Figure 1 As shown, the contact network deicing device provided in this embodiment includes a base 1, a bracket 6, a roller 7 and a horn 5. The base 1 is a foldable structure, similar to the swing arm structure of a single-arm pantograph. The base 1 ensures that the contact network deicing device thereon can be pressed on the contact line 10 without damaging the contact line 10 (such as Figure 5 The preset contact pressure value is 70±10N.

[0023] The upper end of the base 1 is provided with a bracket 6. The bracket 6 is rotatably provided with rollers 7 at both ends in the X direction. The material of the roller 7 is selected from a material with low strength, and its tensile strength is 100 MPa ~ 140 MPa, such as EN AW-1080A series aluminum alloy material or other composite materials. The roller 7 is detachably connected to the bracket 6, which is convenient for replacement of the roller 7.

[0024] The outer diameter of the roller 7 is 80 mm. If it is too small, it will be detrimental to the structural strength of the roller 7. If it is too large, it will be too heavy and difficult to roll. At the same time, too large a diameter is not conducive to the teeth on the roller 7 hitting and cutting into the ice layer, especially the ice layer produced by freezing rain.

[0025] The roller 7 is provided with n hobbing teeth 71, where n is an odd number ≥ 3. Figure 4As shown, the hob 71 is a trapezoidal tooth with a tooth top width of ≥7mm and a tooth height of ≥7mm. There is an angle α between the two sides forming the thickness of the hob 71, α=30°. It is ensured that while the ice layer is subjected to pressure damage, the contact network surface is not damaged due to the sharpness of the tooth top of the hob 71. During the rolling process of the drum 7, in order to protect the surface of the contact line 10, the edge of the hob 71 is chamfered, and the chamfer radius is not less than 1mm.

[0026] like Figure 3 As shown, the two ends of the roller 7 extending along the Y direction are provided with horns 5, and the Y direction and the X direction are perpendicular to each other on the same top view projection plane. The X direction is the forward direction of the maintenance vehicle, and the Y direction is the width direction of the maintenance vehicle.

[0027] Embodiment 2 The first embodiment is repeated, except that the roller 7 of this embodiment has a first roller 2 and a second roller 4. The first roller 2 is provided at one end of the bracket 6 in the X direction, and the second roller 4 is provided at the other end of the bracket 6 in the X direction. The first roller 2 has n1 hobbing teeth 71, and the second roller 4 has n2 hobbing teeth 71, where n1<n2. In this embodiment, n1=7, and n2=11. The rollers 7 with different numbers of hobbing teeth 71 can hit different positions of the contact line 10 at different frequencies to increase the efficiency of deicing.

[0028] Embodiment 3 Repeat Example 1 or 2, except that Figure 1 , Figure 5 As shown, the bracket 6 is provided with an ice-removing shovel 3, and the ice-removing shovel 3 is located between the two rollers 7. The material of the ice-removing shovel 3 is the same as that of the rollers 7. The ice-removing shovel 3 can remove large pieces of ice lumps and other leftovers that the front roller 7 fails to remove and skips.

[0029] The de-icing shovel 3 includes a connecting column 31 connected to the bracket 6 and a shovel plate 32 disposed on the top of the connecting column 31 . The shovel plate 32 has a plurality of shovel teeth 33 arranged at both ends of the X direction.

[0030] The ends of the scraping teeth 33 are sharp teeth for removing ice condensed on the surface of the contact network. The thickness of the scraping plate 32 is ≥5mm, and the width of the scraping plate 32 in the X direction is ≥70mm; there is an angle β between the two sides forming the thickness of the scraping teeth 33, β is a right angle or an obtuse angle; the tooth pitch of the scraping teeth 33 is ≥20mm.

[0031] The spacing between the first roller 2 and the de-icing shovel 3 is not less than 250 mm, and the spacing between the de-icing shovel 3 and the second roller 4 is not less than 250 mm, to ensure that ice debris removed by one structure (such as a roller, a de-icing shovel) has space to fall, and will not be repeatedly crushed by another structure (such as a roller, a de-icing shovel) and re-covered on the contact network, increasing the difficulty of de-icing the next structure.

[0032] The de-icing shovel 3 is lower than the upper surface of the roller 7 by a certain height in the height direction, and the height value is 4mm~5mm, so as to ensure that even when the de-icing shovel 3 is at the lowest position between the two rolling teeth 71 on the roller 7, there is a distance greater than 1.5mm between the contact line 10 and the de-icing shovel 3, and no damage is caused to the contact line 10.

[0033] The height change of the contact wire 10 during operation is absorbed by the elastic structure of the base 1, which is the same as the principle of the pantograph and will not be repeated. No matter how the height of the contact wire 10 changes, due to the limitation of the size chain of the de-icing shovel 3 and the roller 7, the de-icing shovel 3 will not touch the contact network and scratch the surface of the contact network.

[0034] Embodiment 4 The present invention also provides a maintenance vehicle, comprising a vehicle body and the above-mentioned contact network deicing device, wherein a substrate 1 of the contact network deicing device is installed on the top of the vehicle body.

[0035] The contact network deicing device has no positive or negative deicing direction, that is, the first roller 2 and the second roller 4 have no front or back direction, and deicing can be performed no matter which one faces forward.

[0036] Two sets of the contact network deicing device can be installed on the maintenance vehicle to ensure that the ice on the contact line 10 is completely removed.

[0037] Embodiment 5 The present invention also provides a method for deicing a contact network using the above maintenance vehicle, comprising the following steps: S1, set the pressure value F of the contact line 10 (such as F=70±10N); S1, start the base 1 so that the roller 7 contacts the contact line 10 and reaches a preset pressure value; S2, start the maintenance vehicle to move forward in the X direction, at which time the roller 7 in contact with the contact line 10 rotates adaptively; S3, the hobbing teeth 71 on the first roller 2 at the front end in the X direction strike and cut into the ice blocks on the contact line 10 to make them fall off or the ice layer crack and loosen; S4, removing the missing ice on the contact line 10 by the de-icing shovel 3; S5, the hobbing teeth 71 on the second roller 4 at the rear end in the X direction remove the ice layer by hitting and rolling. Because most of the ice layer has been removed, the movement mode of the second roller 4 is basically only rolling without jumping.

[0038] The present invention provides an automatic contact network deicing device, which is installed on the top cover of an engineering maintenance vehicle. Compared with the manual deicing method, the device can automatically remove ice on the contact line caused by freezing rain, avoid personal safety accidents of construction workers, quickly restore the operation of the electrified railway caused by freezing, and restore normal traffic, which plays a very important role in ensuring the normal operation of the railway.

[0039] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A contact network deicing device, characterized in that: The invention comprises a base (1), a bracket (6) connected to the upper end of the base (1), and a roller (7) rotatably arranged at both ends of the bracket (6) in the X direction, wherein n rolling teeth (71) are arranged on the circumference of the roller (7), where n is an odd number ≥ 3, and the base (1) is used to move the roller (7) up and down so as to maintain the roller in a position where the rolling teeth can contact the contact network.

2. The contact network deicing device according to claim 1, characterized in that: A first roller (2) is provided at one end of the bracket (6) in the X direction, and a second roller (4) is provided at the other end of the bracket (6) in the X direction. The first roller (2) has n1 hobbing teeth (71), and the second roller (4) has n2 hobbing teeth (71), where n1<n2.

3. The contact network deicing device according to claim 1, characterized in that: An angle α is formed between two side surfaces forming the thickness of the hobbing tooth (71), and α is an acute angle.

4. The contact network deicing device according to claim 1, characterized in that: The diameter of the roller (7) is 80 mm; the tooth top width of the hobbing gear (71) is ≥7 mm, and the tooth height is ≥7 mm.

5. The contact network deicing device according to claim 1, characterized in that: It also comprises an ice-removing shovel (3) arranged on the bracket (6), wherein the ice-removing shovel (3) is located between the two rollers (7).

6. The contact network deicing device according to claim 5, characterized in that: The de-icing shovel (3) comprises a connecting column (31) connected to the bracket (6) and a shovel plate (32) arranged on the top of the connecting column (31), and the shovel plate (32) is provided with a plurality of shovel teeth (33) arranged at both ends in the X direction.

7. The contact network deicing device according to claim 6, characterized in that: The thickness of the shovel plate (32) is ≥5 mm, and the width of the shovel plate (32) in the X direction is ≥70 mm; an angle β is formed between two side surfaces forming the thickness of the shovel teeth (33), and β is a right angle or an obtuse angle; and the tooth pitch of the shovel teeth (33) is ≥20 mm.

8. The contact network deicing device according to claim 1, characterized in that: The two ends of the roller (7) extending along the Y direction are provided with horns (5), and the Y direction and the X direction are perpendicular to each other on the same top projection plane.

9. A maintenance vehicle, comprising a vehicle body, characterized in that: It also comprises a contact network deicing device as claimed in any one of claims 1 to 8, wherein the contact network deicing device base (1) is installed on the top of the vehicle body.

10. A method for deicing a contact network using the maintenance vehicle as claimed in claim 9, characterized in that: include: Starting the base (1) so that the hobbing teeth (71) on the roller (7) come into contact with the contact line (10); The maintenance vehicle is started to move forward in the X direction, at which time the roller (7) in contact with the contact line (10) rotates adaptively; the rolling teeth (71) on the roller (7) at the front end in the X direction cause ice blocks on the contact line (10) to fall off or cause the ice layer to crack and loosen by striking and cutting; the rolling teeth (71) on the roller (7) at the rear end in the X direction remove the remaining ice layer by striking and rolling.

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