Foreign matter removing device for track overhead line system

Abstract

The invention discloses a foreign matter removing device for a track contact network, and relates to the technical field of track contact networks, the foreign matter removing device comprises a box type walking vehicle, two rhombic telescopic frames are arranged in the box type walking vehicle, a base is horizontally connected between the upper ends of the two rhombic telescopic frames, and a mechanical arm is installed on the upper portion of the base. According to the foreign matter removing device for the track overhead line system, by integrating three removing mechanisms of flame jetting, water flow flushing and mechanical clamping, flexible switching and collaborative operation of foreign matter removing modes are achieved. Under the transmission action of a servo motor and a gear rack, a flame injection pipe and a water flow injection pipe can move reversely to complete stretching and storage, precise positioning is matched with a mechanical arm, the structure of foreign matter is damaged through flame combustion, then residual chippings are flushed through high-pressure water flow, and if stubborn foreign matter still exists, a claw driven by an electric push rod can further clamp and remove the stubborn foreign matter; and due to the stepped action of the triple means, the cleaning efficiency and thoroughness of complex foreign matters are remarkably improved.

Description

TECHNICAL FIELD

[0001] The embodiment of the application relates to the field of track contact network, in particular to a track contact network foreign matter removing device. BACKGROUND

[0002] As a key power supply facility of electrified railway and urban rail transit, the safe and stable operation of the track contact network is directly related to the normal traffic of the train. The contact network is usually erected in the air and is easily affected by natural environment and human factors, such as foreign matters such as plastic bags, branches and advertising cloth winding or hanging, which may cause short circuit, tripping and even equipment damage, and even cause stoppage accidents in serious cases. Therefore, timely and efficient removal of foreign matters in the contact network is an important link to ensure the safe operation of the rail transit system, and the related removal device needs to have remote operation capability, precise operation performance and reliability to adapt to complex working conditions to meet the removal requirements of different types of foreign matters.

[0003] In the existing contact network foreign matter removing technology, the removal means has the problem of singleness: For example, the existing technology only relies on mechanical cutting, high-pressure water gun washing or manual insulating rod picking, which is difficult to deal with complex foreign matters with strong toughness, close adhesion or residues after burning, resulting in low removal efficiency or incomplete removal; At the same time, the existing device generally lacks a matching foreign matter collecting mechanism, and in the removal process, the foreign matter is easily directly dropped to the track or the ground under the action of gravity, which not only may cause secondary damage to the facilities below, but also may form environmental pollution due to the scattering of foreign matters, especially for the ashes or metal scraps after burning, the cleaning difficulty is further increased, which affects the environmental tidiness and safety of the operation site. SUMMARY

[0004] In view of the defects of the prior art, the application provides a track contact network foreign matter removing device, which solves the problems of single removal means and lack of effective foreign matter collecting mechanism in the existing track contact network foreign matter removing device.

[0005] To achieve the above purpose, the application is realized by the following technical scheme: A track contact network foreign matter removing device, comprising: A box-type walking vehicle, two rhombic telescopic frames are arranged in the box-type walking vehicle, and a base is horizontally connected between the upper ends of the two rhombic telescopic frames; A mechanical arm, the mechanical arm is installed on the upper part of the base, one end of the mechanical arm is connected with a shell seat, and a servo motor is installed on one side surface of the shell seat; The self-switching cleaning assembly is arranged inside the shell seat; the self-switching cleaning assembly comprises a flame injection pipe and a water flow injection pipe arranged in the shell seat respectively, and the flame injection pipe and the water flow injection pipe are provided with racks on opposite sides; the self-switching cleaning assembly further comprises a gear connected to an output shaft of a servo motor, and the gear is engaged with the racks on the flame injection pipe and the water flow injection pipe respectively; the rotation of the gear enables the flame injection pipe and the water flow injection pipe to be freely switched to extend out of or retract into the shell seat.

[0006] As a further limitation of the preferred embodiment of the present application, the upper part of the box type walking vehicle is further provided with a gas storage tank and a water tank respectively; The tail ends of the flame injection pipe and the water flow injection pipe are connected with delivery pipes, and the other ends of the delivery pipes on the flame injection pipe are arranged in the gas storage tank; The other ends of the delivery pipes on the water flow injection pipe are arranged in the water tank, and a water pump is arranged in the water tank to pump water into the water flow injection pipe; a lighter is arranged on the flame injection pipe.

[0007] As a further limitation of the preferred embodiment of the present application, the opposite sides of the flame injection pipe and the water flow injection pipe are provided with protrusions, and the inside of the shell seat is provided with limiting grooves matched with the protrusions; one end of the protrusion is arranged in the limiting groove and is in sliding connection with the shell seat.

[0008] As a further limitation of the preferred embodiment of the present application, it further comprises: The grabbing mechanism for removing foreign matters is arranged on the shell seat; The grabbing mechanism comprises a plurality of claws equidistantly hinged to the outer side edge of one end of the water flow injection pipe, a moving sleeve slidingly arranged on the water flow injection pipe, and an electric push rod mounted on one side of the water flow injection pipe; the output shaft of the electric push rod is connected with the moving sleeve; the outer side edge of the moving sleeve is equidistantly hinged with a plurality of connecting rods corresponding to the claws; the other end of the connecting rod is hinged to the claw; the connecting rod enables the claw to realize the grabbing action through the action of the electric push rod.

[0009] As a further limitation of the preferred embodiment of the present application, it further comprises: The foreign matter collecting mechanism is mounted at the bottom of the shell seat; The foreign matter collecting mechanism comprises a hydraulic cylinder connected to the bottom of the shell seat and two limiting strips; a pipe body is rotatably arranged between the lower ends of the two limiting strips; a step motor is mounted at one end of the pipe body, and the output shaft of the step motor is connected with a material receiver; the output shaft of the hydraulic cylinder is hinged with an adjusting rod, and the other end of the adjusting rod is hinged to the pipe body.

[0010] As a further limitation of the preferred embodiment of the present application, the material receiver comprises: The screw rod is connected to the output shaft of the stepper motor, is located in the pipe body, and the outside of the screw rod is threadedly connected with the moving seat. The memory alloy strip is connected between the other ends of the two connecting strips, the lower edge of the memory alloy strip is connected with the material receiving bag, and the material receiving bag corresponds to the position of one end of the flame jet pipe.

[0011] As a further limitation of the preferred embodiment of the present application, the inside of the memory alloy strip is a hollow structure, and a heating wire for heating the memory alloy strip is installed in the inside of the hollow structure.

[0012] As a further limitation of the preferred embodiment of the present application, when the memory alloy strip is heated to a temperature of 100 DEG C or above, the memory alloy strip undergoes annular phase change, the material receiving bag is opened, and when the memory alloy strip cools to a temperature of 100 DEG C or below, the memory alloy strip undergoes strip phase change, and is conveniently accommodated in the pipe body.

[0013] Compared with the prior art, the track contact net foreign matter removing device has the following beneficial effects: The track contact net foreign matter removing device of the present application realizes flexible switching and collaborative operation of the foreign matter removing mode through the integration of the flame jet, water flow flushing and mechanical clamping triple removing mechanism. Under the action of the servo motor and the gear rack transmission, the flame jet pipe and the water flow jet pipe can be reversely moved to complete the extension and accommodation, and cooperate with the accurate positioning of the mechanical arm to first burn the foreign matter structure with flame, then flush the remaining debris with high-pressure water flow, and if there are still stubborn foreign matters, the claw driven by the electric push rod can further clamp and remove them. The three methods act in a ladder mode, which significantly improves the efficiency and thoroughness of removing complex foreign matters. Secondly, the track contact net foreign matter removing device of the present application drives the memory alloy strip to extend out of the pipe body and heats it to the phase change temperature, so that it changes from a strip shape to an annular shape to open the material receiving bag. Combined with the hydraulic cylinder adjusting the angle of the pipe body, the material receiving bag is accurately aligned below the foreign matter to effectively collect the remaining materials falling during the cleaning process, thereby avoiding environmental pollution. After the operation is completed, the memory alloy strip cools down to restore the strip shape and is automatically accommodated back into the pipe body, which not only realizes the on-demand unfolding of the material receiving function, but also completes the automatic folding through the shape memory characteristics of the material, thereby greatly reducing the space occupation in the non-operation state. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings accompanying the specification of this application serve to provide further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation of the present application.

[0015] In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present application. Figure 2 Structure diagram of self-switching type cleaning assembly of the present application; Figure 3 Structure diagram of foreign matter collecting mechanism of the present application; Figure 4 Structure diagram of the first state of the material receiving device of the present application; Figure 5 Structure diagram of the second state of the material receiving device of the present application; Figure 6 Structure diagram of the memory alloy strip of the present application.

[0016] In the figure: 1, box type walking vehicle; 2, diamond-shaped telescopic frame; 3, base; 4, mechanical arm; 5, shell seat; 6, servo motor; 7, self-switching type cleaning assembly; 71, flame injection pipe; 72, water flow injection pipe; 73, rack; 74, gear; 75, grabbing mechanism; 751, claw; 752, moving sleeve; 753, connecting rod; 754, electric push rod; 76, protruding block; 77, limiting groove; 78, conveying pipe; 8, foreign matter collecting mechanism; 81, limiting strip; 82, pipe body; 83, stepping motor; 84, material receiving device; 841, screw rod; 842, moving seat; 843, connecting strip; 844, memory alloy strip; 845, material receiving bag; 846, heating wire; 85, hydraulic cylinder; 86, adjusting rod; 9, gas storage tank; 10, water tank. DETAILED DESCRIPTION

[0017] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0019] In the present application, unless otherwise specified, the orientation words such as "up, down, top, bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0020] Please refer to Figure 1The box type walking vehicle 1 of the embodiment of the present application further comprises a gas storage tank 9 and a water tank 10 arranged at the upper part of the box type walking vehicle 1. The self-switching type removing assembly 7 is arranged in the shell seat 5. The foreign matter collecting mechanism 8 is arranged at the bottom of the shell seat 5. Further, the upper part of the box type walking vehicle 1 of the embodiment of the present application further comprises a gas storage tank 9 and a water tank 10.

[0021] In one implementation manner of the present application, please refer to Figure 1 and Figure 2 The self-switching type removing assembly 7 of the present application comprises a flame spraying pipe 71 and a water flow spraying pipe 72 arranged in the shell seat 5 respectively, and the opposite sides of the flame spraying pipe 71 and the water flow spraying pipe 72 are both provided with a rack 73. Further, the self-switching type removing assembly 7 of the present application further comprises a gear 74 connected to the output shaft of the servo motor 6, the gear 74 is engaged with the rack 73 on the flame spraying pipe 71 and the water flow spraying pipe 72 respectively, through the rotation of the gear 74, the flame spraying pipe 71 and the water flow spraying pipe 72 can be freely switched to extend out of or retract into the shell seat 5, and the shell seat 5 is further provided with a grabbing mechanism 75 for removing foreign matters.

[0022] Please refer to Figures 1-2 In the embodiment of the present application, the tail end of the flame spraying pipe 71 and the water flow spraying pipe 72 is connected with a conveying pipe 78, the other end of the conveying pipe 78 on the flame spraying pipe 71 is arranged in the gas storage tank 9, the other end of the conveying pipe 78 on the water flow spraying pipe 72 is arranged in the water tank 10, a water pump is arranged in the water tank 10 for pumping water into the water flow spraying pipe 72, and an igniter is arranged on the flame spraying pipe 71.

[0023] In use, the box-type traveling vehicle 1 is moved to the designated position, then the diamond-shaped telescopic frame 2 raises the base 3. Next, the robotic arm 4 moves the housing 5 to the position of the foreign object on the contact network. Then, under the operation of the servo motor 6, the gear 74 is driven to rotate. Since the gear 74 meshes with the rack 73 on the flame jet pipe 71 and the water jet pipe 72 respectively, the rotation of the gear 74 can drive the flame jet pipe 71 and the water jet pipe 72 to move respectively, and the two move in opposite directions. First, the flame jet pipe 71 extends out of the housing 5. The robotic arm 4 aligns the flame jet pipe 71 with the foreign object on the contact network. After alignment, the igniter on the flame jet pipe 71 causes the flame jet pipe 71 to spray flames, burning the foreign object and achieving the effect of removing the foreign object. Then, the servo motor 6 continues to work, moving the flame jet pipe 71 into the housing 5, while the water jet pipe 72 extends out of the housing 5. Under the action of the water pump built into the water tank 10, water is flushed onto the burned foreign object, washing it away.

[0024] Please see Figures 1-2 In this embodiment of the invention, a protrusion 76 is provided on the opposite side of the flame jet pipe 71 and the water jet pipe 72. A limiting groove 77 adapted to the protrusion 76 is provided on both sides of the inner side of the housing base 5. One end of the protrusion 76 is disposed in the limiting groove 77 and is slidably connected to the housing base 5. When the flame jet pipe 71 and the water jet pipe 72 move, the protrusion 76 will slide in the limiting groove 77, which plays a guiding and limiting role in the displacement of the flame jet pipe 71 and the water jet pipe 72.

[0025] Please see Figures 1-2 In this embodiment of the invention, the gripping mechanism 75 includes a plurality of claws 751 equidistantly hinged to the outer edge of one end of the water jet pipe 72, a movable sleeve 752 slidably sleeved on the water jet pipe 72, and an electric push rod 754 installed on one side of the water jet pipe 72. The output shaft of the electric push rod 754 is connected to the movable sleeve 752. A plurality of connecting rods 753 corresponding to each claw 751 are equidistantly hinged to the outer edge of the movable sleeve 752. The other end of the connecting rod 753 is hinged to the claw 751. Through the action of the electric push rod 754, the connecting rod 753 enables the claw 751 to perform a gripping action.

[0026] When in use, move the claw 751 to the location of the foreign object, and then the electric push rod 754 will move the moving sleeve 752 again. The claws 751 will then come together to clamp the foreign object and remove it, thereby further improving the removal effect of the foreign object.

[0027] Please see Figure 1 and Figures 3-6The foreign object collection mechanism 8 of this embodiment includes a hydraulic cylinder 85 connected to the bottom of the housing 5 and two limiting bars 81. A tube 82 is rotatably arranged between the lower ends of the two limiting bars 81. A stepper motor 83 is installed at one end of the tube 82, and the output shaft of the stepper motor 83 is connected to a receiving device 84. An adjusting rod 86 is hinged to the output shaft of the hydraulic cylinder 85, and the other end of the adjusting rod 86 is hinged to the tube 82.

[0028] Please see Figure 1 and Figures 3-6 In this embodiment of the invention, the receiving device 84 includes a screw 841 connected to the output shaft of the stepper motor 83. The screw 841 is located inside the tube body 82, and a movable seat 842 is screwed onto the outside of the screw 841 by a thread. Two connecting strips 843 are connected to one side of the tube body 82, and a shape memory alloy strip 844 is connected between the other ends of the two connecting strips 843. A receiving pocket 845 is connected to the lower edge of the shape memory alloy strip 844. The receiving pocket 845 corresponds to the position of one end of the flame jet tube 71. When foreign objects are removed, the foreign objects will fall into the receiving pocket 845.

[0029] Please see Figure 1 and Figures 3-6 In this embodiment of the invention, the shape memory alloy strip 844 has a hollow structure inside, and a heating wire 846 for heating the shape memory alloy strip 844 is installed inside the hollow structure.

[0030] Please see Figure 1 and Figures 3-6 In this embodiment of the invention, when the heating wire 846 heats the shape memory alloy strip 844 to above 50 degrees Celsius, the shape memory alloy strip 844 undergoes a ring-shaped phase change, opening the receiving pocket 845. When the shape memory alloy strip 844 cools to below 40 degrees Celsius, it undergoes a strip-shaped phase change, making it easier to be stored inside the tube body 82. In use, before removing foreign objects, the stepper motor 83 drives the screw 841 to rotate. The screw 841 drives the moving seat 842 to move, causing the shape memory alloy strip 844 at one end of the connecting strip 843 to move out of the tube body 82. Then, the heating wire 846 inside the shape memory alloy strip 844 is activated, heating the shape memory alloy strip 844. When the shape memory alloy strip 844 is heated to above 50 degrees Celsius, a phase change occurs, turning it into a ring shape, as shown below. Figure 3 As shown, this allows the receiving bag 845 to be opened. Under the operation of the hydraulic cylinder 85, the adjusting rod 86 adjusts the angle of the tube 82, moving the receiving bag 845 below the foreign object. When the foreign object is removed, it falls into the receiving bag 845 for collection, preventing it from falling to the ground and polluting the environment. After the foreign object is removed, the heating wire 846 stops heating the shape memory alloy strip 844. When the shape memory alloy strip 844 cools to below 40 degrees Celsius, it returns to its original shape, gradually becoming a strip. Figure 5As shown, the stepper motor 83 then drives the screw 841 to rotate, and the screw 841 drives the shape memory alloy strip 844 at one end of the connecting strip 843 to move, so that the shape memory alloy strip 844, which has become a strip, is stored in the tube body 82, reducing its space occupation.

[0031] When the track contact network foreign object removal device of the present invention is used, the box-type traveling vehicle 1 is moved to the designated position, then the diamond-shaped telescopic frame 2 raises the base 3, then the robotic arm 4 moves the housing seat 5 to the position of the foreign object on the contact network, and then the servo motor 6 drives the gear 74 to rotate. Since the gear 74 meshes with the rack 73 on the flame jet pipe 71 and the water jet pipe 72 respectively, the rotation of the gear 74 can drive the flame jet pipe 71 and the water jet pipe 72 to move respectively, and the two move in opposite directions. First, the flame jet pipe 71 extends out of the housing seat 5, and the robotic arm 4 aligns the flame jet pipe 71 with the foreign object on the contact network. After alignment, the igniter on the flame jet pipe 71 causes the flame jet pipe 71 to spray flames, which burns the foreign object and achieves the effect of removing the foreign object. Furthermore, the servo motor 6 continues to operate, causing the flame jet pipe 71 to move into the housing 5, while the water jet pipe 72 extends out from the housing 5. Then, the output shaft of the electric push rod 754 drives the moving sleeve 752 to move. The moving sleeve 752 causes each connecting rod 753 to open the claws 751 connected to it, allowing the water jet nozzle of the water jet pipe 72 to be exposed. Under the action of the water pump built into the water tank 10, water is flushed towards the burned foreign matter, washing it away. If the foreign matter still exists after rinsing, the claws 751 are moved to the position of the foreign matter. Then, the electric push rod 754 moves the moving sleeve 752 again, and the claws 751 will close together, clamping the foreign matter and removing it, thereby further improving the removal effect of the foreign matter. Before the foreign object is removed, the stepper motor 83 of this invention drives the screw 841 to rotate, and the screw 841 drives the moving seat 842 to move, so that the shape memory alloy strip 844 at one end of the connecting strip 843 is moved out of the tube body 82. Then, the heating wire 846 inside the shape memory alloy strip 844 is activated. The heating wire 846 heats the shape memory alloy strip 844. When the shape memory alloy strip 844 is heated to above 50 degrees Celsius, a phase transition occurs, and it becomes ring-shaped, such as... Figure 3 As shown, this allows the receiving bag 845 to be opened. Under the operation of the hydraulic cylinder 85, the adjusting rod 86 adjusts the angle of the tube 82, moving the receiving bag 845 below the foreign object. When the foreign object is removed, it falls into the receiving bag 845 for collection, preventing it from falling to the ground and polluting the environment. After the foreign object is removed, the heating wire 846 stops heating the shape memory alloy strip 844. When the shape memory alloy strip 844 cools to below 40 degrees Celsius, it returns to its original shape, gradually becoming a strip. Figure 5As shown, the stepper motor 83 then drives the screw 841 to rotate, and the screw 841 drives the shape memory alloy strip 844 at one end of the connecting strip 843 to move, so that the shape memory alloy strip 844, which has become a strip, is stored in the tube body 82, reducing its space occupation.

[0032] The above solutions are merely illustrative examples of preferred embodiments and are not intended to limit the scope of the invention. Appropriate substitutions and / or modifications can be made according to user needs when implementing this invention.

[0033] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0034] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A device for removing foreign objects from a catenary of a railway, characterized in that, Include: Box walking car, the inside of box walking car is provided with two rhombus telescopic frames, the upper ends of two rhombus telescopic frames are horizontally connected with base; Mechanical arm, mechanical arm is installed on the upper portion of base, one end of mechanical arm is connected with shell seat, one side of shell seat is installed with servo motor; Self-switching type cleaning assembly, self-switching type cleaning assembly is arranged in the inside of shell seat;Self-switching type cleaning assembly includes flame jet pipe and water flow jet pipe arranged in shell seat respectively, the opposite side of flame jet pipe and water flow jet pipe is provided with rack, the gear connected with servo motor output shaft is further included in self-switching type cleaning assembly, the rack on flame jet pipe and water flow jet pipe is engaged with gear respectively, through the rotation of gear, flame jet pipe and water flow jet pipe can be switched freely from shell seat to stretch out or retract.

2. The device for removing foreign objects from a catenary according to claim 1, characterized in that, The upper portion of box walking car is further provided with gas storage tank and water tank respectively; The tail end of flame jet pipe and water flow jet pipe is connected with conveying pipe, the other end of conveying pipe on flame jet pipe is arranged in gas storage tank; The other end of conveying pipe on water flow jet pipe is arranged in water tank, water pump is arranged in water tank for pumping water into water flow jet pipe, igniter is arranged on flame jet pipe.

3. A device for removing foreign objects from a catenary of an overhead line according to claim 2, characterized in that The opposite side of flame jet pipe and water flow jet pipe is provided with protruding block, the inside of shell seat is provided with limiting groove matched with protruding block, one end of protruding block is arranged in limiting groove and is connected with shell seat in sliding mode.

4. A device for removing foreign objects from a catenary according to claim 3, characterized in that Further include: Grabbing mechanism, grabbing mechanism for removing foreign matter is arranged on shell seat; The grabbing mechanism includes several claws equidistantly hinged to the outer side edge of one end of water flow jet pipe, moving sleeve slidably arranged on water flow jet pipe and electric push rod installed on one side of water flow jet pipe, the output shaft of electric push rod is connected with moving sleeve, the outer side edge of moving sleeve is equidistantly hinged with several connecting rods corresponding to each claw, the other end of connecting rod is hinged to claw, through the action of electric push rod, connecting rod makes claw realize grabbing action.

5. A device for removing foreign bodies from a catenary of an overhead line according to claim 4, characterized in that Further include: Foreign matter collecting mechanism, foreign matter collecting mechanism is installed at the bottom of shell seat; Foreign matter collecting mechanism includes hydraulic cylinder connected to the bottom of shell seat and two limiting strips, pipe body is rotatably arranged between the lower ends of two limiting strips, one end of pipe body is installed with stepping motor, and the output shaft of stepping motor is connected with material receiver, the output shaft of hydraulic cylinder is hinged with adjusting rod, the other end of adjusting rod is hinged to pipe body.

6. A device for removing foreign bodies from a catenary of an overhead line according to any one of claims 2 to 5, characterized in that The material receiver includes: Screw rod, screw rod is connected to the output shaft of stepping motor, screw rod is located in pipe body, and the outer portion of screw rod is threadedly connected with moving seat, one side of pipe body is connected with two connecting strips; Memory alloy strip, memory alloy strip is connected between the other ends of two connecting strips, the lower edge of memory alloy strip is connected with material receiving bag, the position of material receiving bag corresponds to one end of flame jet pipe, when removing foreign matter, foreign matter will fall into material receiving bag.

7. A device for removing foreign bodies from a catenary of a rail contact system according to claim 6, characterized in that The inside of memory alloy strip is hollow structure, heating wire for heating memory alloy strip is installed in the inside of hollow structure.

8. A device for removing foreign bodies from a catenary of a rail contact system according to claim 7, characterized in that The heating wire heats the memory alloy strip to 100 DEG C or above, the memory alloy strip occurs annular phase change, the receiving pocket is supported open, the memory alloy strip cools to 50 DEG C or below, the memory alloy strip occurs strip phase change, and is convenient to be received into the pipe body.

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