A pantograph arc guiding device for reducing arc ablation in an electrified railway

Abstract

The utility model discloses an electrical railway pantograph arc -guiding device reducing electric arc ablation relates to electrified railway traction power supply technical field, including base mechanism, the top of base mechanism is provided with support mechanism, the bottom of support mechanism is provided with arc -guiding mechanism, the arc -guiding mechanism includes the slide plate support, the bottom fixed mounting of slide plate support has slide plate base, the utility model opens V type arc -guiding groove in the middle part of slide, and the V type ceramic insulation box is inlayed in the groove, and the left and right sides of slide install the magnetic blow coil and are passed into 100~200A direct current and produce 0.5~1T transverse magnetic field, and the arc is moved to the middle part of slide by the magnetic field forced drive, and the V type groove wall compresses the arc to the groove center through the heat shrinkage effect, avoids the transverse diffusion, and the arc that originally random diffusion is concentrated and is restricted in the V type groove, and the ablation area is reduced significantly, and the slide plate material loss is reduced, and the service life is prolonged, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of traction power supply technology for electrified railways, specifically to an arc guiding device for the pantograph of electrified railways that reduces arc erosion. Background Technology

[0002] Electrified railways are the core power source for modern rail transit. They transmit electrical energy through the sliding contact between the pantograph and the overhead contact line. However, when trains are running at high speeds or when there are irregularities in the contact line (such as hard spots or localized wear), the pantograph's sliding contact plate can momentarily separate from the contact wire, generating a high-temperature electric arc. This arc not only burns the surfaces of the pantograph and contact wire, reducing their lifespan, but also causes safety hazards such as electromagnetic interference and system voltage fluctuations. The existing technology has the following problems:

[0003] Because traditional pantographs lack an arc guiding structure, the arc spreads randomly on the pantograph surface, resulting in dispersed and unpredictable ablation areas. This leads to rapid local material loss in the pantograph (such as gasification of carbon pantographs and melting of metal pantographs), requiring frequent replacements and increasing maintenance costs. Furthermore, existing technologies often rely on the pantograph's own materials (such as adding copper-based composite materials) or optimized contact wire structure to suppress the arc. However, in high-speed airflow environments, the arc is difficult to extinguish quickly, and residual ionized gas is prone to reignite when the pantograph and contact wire approach each other again, forming a continuous arc chain and exacerbating equipment damage. Utility Model Content

[0004] This invention provides an arc guiding device for pantographs in electrified railways to reduce arc erosion, thereby solving the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] An arc guiding device for an electrified railway pantograph to reduce arc erosion includes a base mechanism, a support mechanism at the top of the base mechanism, an arc guiding mechanism at the bottom of the support mechanism, and a sliding plate bracket. A sliding plate base is fixedly installed at the bottom of the sliding plate bracket, and sliding plates are fixedly installed on both the front and rear sides of the top of the sliding plate base. L-shaped brackets are fixedly installed at both ends of the sliding plate bracket. Magnetic blow-out coils are fixedly installed at the top vertical points of the two L-shaped brackets, respectively located on the left and right sides of the two sliding plates. A V-shaped arc guiding groove is longitudinally formed in the middle of each of the two sliding plates, and a V-shaped ceramic insulating box is fixedly installed inside the cavity of each of the two V-shaped arc guiding grooves. Conical metal blocks are fixedly installed on the left and right sides of the bottom of each of the two sliding plates.

[0007] A further improvement of this utility model is that: several copper-tungsten alloy arc-extinguishing grid plates are uniformly embedded and installed between the front and rear sides of the inner walls of the two V-shaped ceramic insulating boxes, and the distance between two adjacent copper-tungsten alloy arc-extinguishing grid plates is 1-2 mm.

[0008] A further improvement of this utility model is that: the base mechanism includes a base frame and a transmission cylinder, the transmission cylinder is located on the rear side of the base frame, the output end of the transmission cylinder is fixedly connected to a connecting rod insulator, the front end of the connecting rod insulator is fixedly connected to a connecting rod, and the bottom rear side of the base frame is fixedly connected to two left and right bow-lowering springs.

[0009] A further improvement of this utility model is that four supporting insulators are fixedly installed in a rectangular array at the bottom of the base frame.

[0010] A further improvement of the present invention is that the support mechanism includes a push rod, the bottom end of which is movably connected to the front end of the base frame, the front end of the connecting rod is hinged to the push rod, and the front ends of the two lowering springs are fixedly connected to the left and right sides of the push rod.

[0011] A further improvement of this utility model is that: a hinge rod is hinged to the middle of the top end of the push rod, and a lower arm is hinged to the other end of the hinge rod; the bottom end of the lower arm is hinged to the middle of the bottom rear side of the base frame; triangular frames are hinged to the left and right sides of the top end of the push rod; the rear end of the triangular frames is fixedly connected to the bottom of the skateboard bracket; a balance bar is hinged to the outer wall of the top end of the push rod; the balance bar is located on one side of the hinge rod, and the other end of the balance bar is movably connected to the middle of the bottom of the skateboard bracket.

[0012] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0013] 1. This utility model provides an arc guiding device for electrified railway pantographs to reduce arc erosion. A V-shaped arc guiding groove is opened in the middle of the pantograph, and a V-shaped ceramic insulating box is embedded in the groove. Magnetic blow coils are installed on the left and right sides of the pantograph, and 100-200A DC current is passed through to generate a 0.5-1T transverse magnetic field. The magnetic field forces the arc to move towards the middle of the pantograph. The V-shaped groove wall compresses the arc to the center of the groove through the thermal contraction effect, avoiding transverse diffusion. The arc that was originally randomly diffused is concentrated and constrained in the V-shaped groove, significantly reducing the ablation area, reducing pantograph material consumption, extending service life, and reducing operation and maintenance costs.

[0014] 2. This utility model provides an arc-guiding device for pantographs in electrified railways to reduce arc erosion. A copper-tungsten alloy arc-extinguishing grid is embedded in a V-shaped ceramic insulating box. Conical metal blocks are set on the left and right sides of the bottom of the sliding plate. After the arc enters the V-shaped groove, it is divided into multiple short arcs by the arc-extinguishing grid. The voltage of each arc segment increases sharply, and the total voltage exceeds the system maintenance voltage. The grid absorbs heat and accelerates the cooling of the arc, achieving rapid extinguishing. The residual arc energy is conducted downward along the V-shaped groove to the conical metal block, and dispersed to the atmosphere through tip discharge. The ceramic insulating box blocks the residual current to prevent the arc from reigniting, effectively extinguishing the arc and dissipating residual energy. This avoids the formation of a continuous arc chain under high-speed airflow and reduces electromagnetic interference and voltage fluctuations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the arc guiding mechanism of the present invention.

[0017] Figure 3 This is a schematic diagram of the skateboard structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the V-shaped ceramic insulating box of this utility model.

[0019] Figure 5 This is a schematic diagram of the base mechanism and support mechanism of the present invention.

[0020] In the diagram: 1. Base mechanism; 11. Base frame; 12. Support insulator; 13. Transmission cylinder; 14. Connecting rod insulator; 15. Connecting rod; 16. Bow-lowering spring; 2. Support mechanism; 21. Push rod; 22. Lower arm; 23. Hinge rod; 24. Triangular frame; 25. Balance bar; 3. Arc guiding mechanism; 31. Slide bracket; 32. Slide base; 33. L-shaped bracket; 34. Slide; 341. V-shaped arc guiding groove; 342. V-shaped ceramic insulation box; 3421. Copper-tungsten alloy arc extinguishing grid; 343. Conical metal block; 35. Magnetic blow-out coil. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3As shown, this utility model provides an arc guiding device for an electrified railway pantograph to reduce arc erosion, including a base mechanism 1, a support mechanism 2 at the top of the base mechanism 1, an arc guiding mechanism 3 at the bottom of the support mechanism 2, an arc guiding mechanism 3 including a slide bracket 31, a slide base 32 fixedly installed at the bottom of the slide bracket 31, slides 34 fixedly installed on the front and rear sides of the top of the slide base 32, L-shaped brackets 33 fixedly installed at the left and right ends of the slide bracket 31, magnetic blow coils 35 fixedly installed at the top vertical points of the two L-shaped brackets 33, the two magnetic blow coils 35 are respectively located on the left and right sides of the two slides 34, V-shaped arc guiding grooves 341 are longitudinally opened in the middle of the two slides 34, V-shaped ceramic insulating boxes 342 are fixedly installed in the inner cavity of the two V-shaped arc guiding grooves 341, and conical metal blocks 343 are fixedly installed on the left and right sides of the bottom of the two slides 34.

[0023] Conical metal blocks 343 are welded to both sides of the bottom of the slide plate 34 to guide the release of electric arc energy. The magnetic blow-out coil 35 is installed on the top of the L-shaped bracket 33. It uses an external power supply to pass 100-200A DC current to generate a magnetic field of 0.5-1T, which covers the left and right sides of the slide plate 34. When an electric arc is generated, the transverse magnetic field generated by the magnetic blow-out coil 35 drives the electric arc to move towards the middle of the slide plate 34, forcing it into the V-shaped arc guide groove 341. The wall of the V-shaped arc guide groove 341 compresses the electric arc to the center of the groove through the thermal contraction effect, avoiding transverse diffusion and reducing the ablation area into the groove.

[0024] like Figure 4 As shown, several copper-tungsten alloy arc-extinguishing grid plates 3421 are evenly embedded between the front and rear sides of the inner walls of the two V-shaped ceramic insulating boxes 342, and the spacing between two adjacent copper-tungsten alloy arc-extinguishing grid plates 3421 is 1-2 mm.

[0025] The electric arc is divided into multiple short arcs by the copper-tungsten alloy arc-extinguishing grid 3421 inside the V-shaped ceramic insulating box 342. The voltage drop of each arc segment increases sharply, and the total arc voltage exceeds the system sustaining voltage. The grid absorbs heat and accelerates the cooling of the arc, and the arc is quickly extinguished. The V-shaped ceramic insulating box 342 can block residual current and prevent the arc from reigniting.

[0026] like Figure 5As shown, the base mechanism 1 includes a base frame 11 and a transmission cylinder 13. The transmission cylinder 13 is located at the rear of the base frame 11. A connecting rod insulator 14 is fixedly connected to the output end of the transmission cylinder 13. A connecting rod 15 is fixedly connected to the front end of the connecting rod insulator 14. Two lowering springs 16 are fixedly connected to the bottom rear side of the base frame 11. Four supporting insulators 12 are fixedly installed in a rectangular array at the bottom of the base frame 11. The support mechanism 2 includes a push rod 21. The bottom end of the push rod 21 is movably connected to the front end of the base frame 11. The front end of the connecting rod 15 is hinged to the push rod 21. Two lowering springs 16 are fixedly connected to the base frame 11. The front end of the bow spring 16 is fixedly connected to the left and right sides of the push rod 21. The top of the push rod 21 is hinged to the middle of the hinge rod 23. The other end of the hinge rod 23 is hinged to the lower arm 22. The bottom end of the lower arm 22 is hinged to the middle of the bottom rear side of the base frame 11. The top of the push rod 21 is hinged to the left and right sides of the triangular frame 24. The rear end of the triangular frame 24 is fixedly connected to the bottom of the skateboard bracket 31. The top outer wall of the push rod 21 is hinged to the balance bar 25. The balance bar 25 is located on one side of the hinge rod 23, and the other end of the balance bar 25 is movably connected to the middle of the bottom of the skateboard bracket 31.

[0027] The base frame 11 is fixed to the roof of the vehicle by four supporting insulators 12. The transmission cylinder 13 is installed on the rear side of the base frame 11. The front end of the bow lowering spring 16 is connected to the push rod 21 to provide the restoring force when lowering the bow. The transmission cylinder 13 pushes the connecting rod 15 through the connecting rod insulator 14, which drives the push rod 21 to rotate around the front hinge point of the base frame 11. When the push rod 21 rises, the hinge rod 23 drives the lower arm 22 to unfold. The triangular frame 24 and the balance bar 25 move together to keep the skateboard bracket 31 horizontal.

[0028] The working principle of the pantograph arc guiding device for reducing arc erosion in electrified railways will be explained in detail below.

[0029] like Figures 1 to 5 As shown, when the train is running, the pantograph sliding plate 34 slides in contact with the contact wire. If an instantaneous separation occurs and an electric arc is generated, the transverse magnetic field generated by the magnetic blow-out coil 35 drives the electric arc to move towards the middle of the sliding plate 34, forcing it into the V-shaped arc guide groove 341. The electric arc is divided into multiple short arcs by the copper-tungsten alloy arc-extinguishing grid 3421 in the V-shaped ceramic insulating box 342. The grid absorbs heat and accelerates the cooling of the electric arc. The residual electric arc is conducted downward along the V-shaped groove to the conical metal block 343, and the energy is dispersed to the atmosphere through tip discharge to avoid continuous burning on the surface of the sliding plate. When the pantograph is lowered, the transmission cylinder 13 retracts, and the pantograph lowering spring 16 pulls the push rod 21 down, causing the sliding plate 34 to detach from the contact wire.

[0030] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An arc guiding device for an electrified railway pantograph to reduce arc erosion, comprising a base mechanism (1), characterized in that: The base mechanism (1) is provided with a support mechanism (2) at the top and an arc guide mechanism (3) at the bottom. The arc guide mechanism (3) includes a skateboard support (31). A skateboard base (32) is fixedly installed at the bottom of the skateboard support (31). A skateboard (34) is fixedly installed on both the front and rear sides of the top of the skateboard base (32). An L-shaped support (33) is fixedly installed at both the left and right ends of the skateboard support (31). A magnetic blow-out coil (35) is fixedly installed at the top vertical position of each of the two L-shaped supports (33). The two magnetic blow-out coils (35) are located on the left and right sides of the two skateboards (34). A V-shaped arc guide groove (341) is longitudinally opened in the middle of each of the two skateboards (34). A V-shaped ceramic insulating box (342) is fixedly installed in the inner cavity of each of the two V-shaped arc guide grooves (341). A conical metal block (343) is fixedly installed on the left and right sides of the bottom of each of the two skateboards (34).

2. The arc guiding device for reducing arc erosion in electrified railway pantographs according to claim 1, characterized in that: Several copper-tungsten alloy arc-extinguishing grid plates (3421) are uniformly embedded between the front and rear sides of the inner walls of the two V-shaped ceramic insulating boxes (342), and the distance between two adjacent copper-tungsten alloy arc-extinguishing grid plates (3421) is 1-2 mm.

3. The arc guiding device for reducing arc erosion in an electrified railway pantograph according to claim 1, characterized in that: The base mechanism (1) includes a base frame (11) and a transmission cylinder (13). The transmission cylinder (13) is located on the rear side of the base frame (11). A connecting rod insulator (14) is fixedly connected to the output end of the transmission cylinder (13). A connecting rod (15) is fixedly connected to the front end of the connecting rod insulator (14). Two lowering springs (16) are fixedly connected to the bottom rear side of the base frame (11).

4. The arc guiding device for reducing arc erosion in an electrified railway pantograph according to claim 3, characterized in that: The bottom rectangular array of the base frame (11) is fixedly installed with four supporting insulators (12).

5. The arc guiding device for reducing arc erosion in an electrified railway pantograph according to claim 3, characterized in that: The support mechanism (2) includes a push rod (21), the bottom end of which is movably connected to the front end of the base frame (11), the front end of the connecting rod (15) is hinged to the push rod (21), and the front ends of the two bow springs (16) are fixedly connected to the left and right sides of the push rod (21).

6. The arc guiding device for reducing arc erosion in an electrified railway pantograph according to claim 5, characterized in that: The push rod (21) has a hinge rod (23) hinged at the middle of its top end, and a lower arm rod (22) hinged at the other end of the hinge rod (23). The bottom end of the lower arm rod (22) is hinged to the middle of the bottom rear side of the base frame (11). Triangular frames (24) are hinged to the left and right sides of the top end of the push rod (21). The rear end of the triangular frame (24) is fixedly connected to the bottom of the skateboard bracket (31). A balance rod (25) is hinged to the outer wall of the top end of the push rod (21). The balance rod (25) is located on one side of the hinge rod (23), and the other end of the balance rod (25) is movably connected to the middle of the bottom of the skateboard bracket (31).

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