A railway existing line contact network positioning and installation structure

Abstract

The invention relates to a positioning and installation structure for an existing railway contact network, belonging to the technical field of rail transit power supply, and comprising two portal frames, wherein the two portal frames are fixedly arranged on a roadbed and respectively located on two sides of a track, the planes where the portal frames on both sides are located are arranged parallel to each other, each portal frame comprises two columns and a cross bar fixedly arranged between the ends of the two columns, a cross beam spanning above the track is arranged between the cross bars of the portal frames on both sides, a positioning device for positioning the load-bearing cables and contact wires of the contact network is arranged on the cross beam, and the portal frame can be arranged to cross a culvert under the railway, thereby preventing the culvert from affecting the stability of the entire positioning device after installation, and construction personnel do not need to modify or remove the existing culvert or other structures, thereby reducing the amount of engineering work, and saving costs and engineering time.

Description

Technical Field

[0001] The invention relates to the technical field of rail transit power supply, and in particular to a positioning and installation structure for an existing railway contact network. Background Art

[0002] With the acceleration of my country's railway electrification process, by the end of 2020, the national railway operating mileage will reach 150,000 kilometers, and the electrification rate will be above 70%. The existing railway electrification process has gradually become an important part of the development of railway electrification. The contact network is a high-voltage transmission line for pantographs to draw current, which is erected in a zigzag shape above the rails in the electrified railway. The contact network is the main framework of the railway electrification project. It is a special form of transmission line erected above the railway line to supply power to electric locomotives. It consists of contact suspension, support device, positioning device, pillar and foundation. The contact suspension includes contact wire, suspension string, load-bearing cable, connecting parts and insulators. The contact suspension is erected on the pillar through a support device. Its function is to transmit the electric energy obtained from the traction substation to the electric locomotive.

[0003] A Chinese patent with authorization announcement number CN206703993U discloses an electrified railway contact network positioning device, including a support column, a first suspension bracket and a right crossbeam arm, characterized in that: a rectangular hole is provided inside the support column, and a top beam is fixed above the support column, a first bracket is fixed above the right side of the support column, and the top of the first bracket is fixedly connected to the top beam through a bracket fixing hole, the right side of the first bracket is fixedly connected to the left crossbeam arm through an insulator, and a contact network mounting structure is provided below the middle of the left crossbeam arm, two support columns are provided, and the support columns are symmetrical about the central axis of the top beam.

[0004] The above-mentioned existing technical solutions have the following defects: According to the "Railway Electric Traction Power Supply Design Specifications", the adjustable range of the support column positioning for conventional speed is only 4 to 7 meters along the line direction. When there are culverts, canals or structures within 4 to 7 meters below the railway, in order to prevent the culverts or other structures from affecting the stability of the entire positioning device, it is necessary to remove the existing culverts and other structures, which increases the amount of engineering work and increases engineering costs and time. Summary of the invention

[0005] In view of the shortcomings of the prior art, the object of the present invention is to provide a positioning and installation structure for an existing railway contact network which does not require the modification of culverts and can improve the stability.

[0006] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0007] A positioning and installation structure for an existing railway contact network comprises two portal frames, both of which are fixedly arranged on a roadbed and respectively located on both sides of a track, the planes where the portal frames on both sides are located are arranged parallel to each other, each of the portal frames comprises two columns and a cross bar fixedly arranged between the ends of the two columns, a cross beam spanning over the track is arranged between the cross bars of the portal frames on both sides, and a positioning device for positioning the load-bearing cables and contact wires of the contact network is arranged on the cross beam.

[0008] By adopting the above technical solution, the culvert under the railway can be crossed by the portal frame, thereby preventing the culvert from affecting the stability of the entire positioning device after installation. Construction workers do not need to modify the existing culvert or other structures, thereby reducing the amount of work and saving costs and engineering time. When the train passes, the vibration amplitude of the positioning device is reduced, and the contact effect between the train pantograph and the contact line of the contact network is improved, thereby improving the current collection quality of the train pantograph.

[0009] In a preferred example, the present invention can be further configured as follows: the cross beam includes a plurality of spliced ​​beams spliced ​​together, and adjacent spliced ​​beams are provided with fixing members for fixing the adjacent spliced ​​beams together.

[0010] By adopting the above technical solution, the cross beam includes multiple spliced ​​beams, so that the multiple spliced ​​beams can be suitable for railways of different widths, thereby improving the applicability of the entire installation structure; the fixing parts can fix adjacent spliced ​​beams together, thereby completing the installation and fixation between the multiple spliced ​​beams.

[0011] In a preferred example, the present invention can be further configured as follows: each of the spliced ​​beams includes three spliced ​​rods arranged parallel to each other, a plurality of reinforcement frames are arranged between the three spliced ​​rods of each spliced ​​beam, the planes where adjacent reinforcement frames are located are parallel to each other and arranged at intervals, each reinforcement frame is arranged in an inverted triangle with the vertex facing downward, the length direction of the spliced ​​rod is arranged along a plane perpendicular to the plane where the reinforcement frame is located, and the three spliced ​​rods are respectively located at the positions of the three vertices of the triangular reinforcement frame.

[0012] By adopting the above technical solution, the spliced ​​beam includes a plurality of three spliced ​​rods, and a triangular reinforcement frame is arranged between the three spliced ​​rods, thereby improving the strength and bearing capacity of the entire span beam, so that the entire span beam can further bear positioning devices of different weights.

[0013] In a preferred example, the present invention can be further configured as follows: the ends of the splicing rods of adjacent spliced ​​beams that are close to each other are each provided with a first connecting flange, the splicing rods are arranged perpendicular to the first connecting flanges, and the fixing members include a plurality of first bolts and first nuts for fixing adjacent first connecting flanges together.

[0014] By adopting the above technical solution, the adjacent spliced ​​beams are fixed by using the first bolts and the first nuts. The fixing method is convenient and simple, and the firmness after fixing is good.

[0015] In a preferred example, the present invention can be further configured as follows: the cross bar includes a first rod body and a second rod body located below the first rod body and arranged parallel to the first rod body, a plurality of reinforcing rods are evenly arranged between the first rod body and the second rod body along the length direction of the cross bar, and both ends of each of the reinforcing rods are respectively fixedly arranged on the first rod body and the second rod body, the upper two spliced ​​rods of the three spliced ​​rods are fixedly arranged on the first rod body, and the lower one spliced ​​rod is fixedly arranged on the second rod body.

[0016] By adopting the above technical solution, the provision of the reinforcing rod improves the strength and bearing capacity of the cross bar, thereby improving the bearing effect of the portal frame on the cross beam, and indirectly improving the bearing effect of the cross beam on the positioning device.

[0017] In a preferred example, the present invention can be further configured as follows: the second rod body includes a first connecting rod and a second connecting rod located at both ends of the connecting rod, the length direction of the first connecting rod is arranged perpendicular to the length direction of the column, the angle between the second connecting rod and the first connecting rod is arranged at an obtuse angle, and the end of the second connecting rod away from the first connecting rod is arranged at a position lower than the first connecting rod.

[0018] By adopting the above technical solution, the setting of the second connecting rod can support the first connecting rod, thereby further improving the strength and bearing capacity of the first rod body and the second rod body, improving the bearing effect of the first rod body and the second rod body on the cross beam, and indirectly improving the bearing effect of the cross beam on the positioning device.

[0019] In a preferred example, the present invention can be further configured as follows: a second connecting flange is provided on the column and at the position where the ends of the first rod body and the second connecting rod are located, a third connecting flange is provided at the ends of the first rod body and the second connecting rod, and the second connecting flange and the third connecting flange are fixed by multiple second bolts and multiple second nuts.

[0020] By adopting the above technical solution, the second connecting flange and the third connecting flange are connected and fixed by using the second bolt and the second nut. The fixing method is convenient and simple, and the firmness of the first rod body and the second rod body on the column is improved.

[0021] In a preferred example, the present invention can be further configured as follows: the positioning device includes a first insulator, one end of the first insulator is fixedly connected to the lowest splicing rod through a suspension base, and the other end is provided with two first connecting ropes, the ends of the two first connecting ropes away from the first insulator are provided with a first positioning ring clamp, the first positioning ring clamps on both sides are respectively provided with a second connecting rope, the ends of the second connecting ropes on both sides away from the first positioning clamp are provided with a second positioning ring clamp, the second positioning ring clamps on both sides are provided with a positioner, the ends of the positioners on both sides away from the second positioning ring clamp are provided with a positioning clamp, and the first positioning ring clamps on both sides are provided with a suspension pulley, the positioning clamp is used for allowing the contact wire of the contact network to pass through, and the suspension pulley is used for allowing the load-bearing cable to pass through.

[0022] By adopting the above technical scheme, the setting of the first insulator can prevent the current on the contact line from being conducted to the cross beam, thereby preventing the current from being conducted to the portal frame, and preventing the portal frame from being electrified and causing harm to the human body; the setting of the positioner can adjust the position of the positioning wire clamp, so that the positioner can drive the contact wire on the positioning wire clamp to be fixed to different heights so as to contact the pantograph of the train; the setting of the positioning wire clamp can guide and fix the contact wire of the contact network, so that the train pantograph can better contact the contact wire in the positioning wire clamp, thereby improving the force-bearing quality of the train; the suspension pulley can allow the load-bearing cable of the contact network to pass through, thereby guiding and fixing the load-bearing cable, so that the load-bearing cable can better bear the contact wire of the contact network.

[0023] In a preferred example, the present invention can be further configured as follows: a first fixing rod and a second fixing rod are arranged between the two upright posts of each of the portal frames, the first fixing rod is located below the second rod body, the second fixing rod is located below the first fixing rod, the first fixing rod and the second fixing rod are arranged parallel to the first rod body, a fixing wire is arranged between the first fixing rod and the second fixing rod of the portal frames on both sides, the fixing wire between the first fixing rods on both sides passes through a first positioning ring wire clamp, the fixing wire between the second fixing rods on both sides passes through a second positioning ring wire clamp, second insulators are arranged at both ends of the fixing wire, and the ends of the second insulators away from the fixing wires are fixed to the first rod body and the second rod body by clamps.

[0024] By adopting the above technical scheme, the fixing wire between the first fixing rods on both sides can play the effect of positioning and fixing the first positioning ring wire clamp, preventing the train pantograph from driving the first positioning ring wire clamp to move when it contacts the contact wire, thereby improving the contact effect between the train pantograph and the contact wire; the fixing wire between the second fixing rods on both sides can play the effect of positioning and fixing the second positioning ring wire clamp, preventing the train pantograph from driving the second positioning ring wire clamp to move when it contacts the contact wire, thereby further improving the contact effect between the train pantograph and the contact wire; the setting of the second insulator can prevent the current on the contact wire from being conducted to the column of the portal frame, thereby preventing the portal frame from being electrified and causing harm to the human body; the setting of the clamp facilitates the fixing and disassembly of the fixing wire, and can make the fixed wire have better firmness after being fixed, thereby indirectly improving the fixing effect of the first positioning ring wire clamp and the second positioning ring wire clamp.

[0025] In a preferred example, the present invention can be further configured as follows: a fourth connecting flange is arranged on the column and at the position where the ends of the first fixing rod and the second fixing rod are located, a fifth connecting flange is arranged at both ends of the first fixing rod and the second fixing rod, and the fourth connecting flange and the fifth connecting flange are fixed by multiple third bolts and multiple third nuts.

[0026] By adopting the above technical solution, the first fixing rod and the second fixing rod are fixed by using the third bolt and the third nut. The fixing method is convenient and simple, and the first fixing rod and the second fixing rod can be located on the column with better firmness, which indirectly improves the fixing effect of the fixing line.

[0027] In summary, the present invention includes at least one of the following beneficial technical effects:

[0028] The portal frame can be used to cross the culvert under the railway, thus preventing the culvert from affecting the stability of the entire positioning device after installation. The construction workers do not need to modify or remove the existing culvert or other structures, thus reducing the amount of work and saving costs and engineering time;

[0029] The fixing wire between the first fixing rods on both sides can fix the first positioning ring wire clamp, and the fixing wire between the second fixing rods on both sides can fix the second positioning ring wire clamp, so that the first positioning ring wire and the second positioning ring wire clamp drive the positioning wire clamp on the positioner to fix the contact wire of the contact network, so that the train pantograph prevents the contact wire from moving after contacting the contact wire, reduces the vibration amplitude of the positioning device when the train passes, improves the contact effect between the train pantograph and the contact wire of the contact network, and thus improves the current collection quality of the train pantograph. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure;

[0031] Figure 2 It is a schematic diagram for showing the structure of the portal frame;

[0032] Figure 3 It is a schematic diagram used to show the structure of the spanning beam;

[0033] Figure 4 yes Figure 3 A magnified view of part A in FIG.

[0034] Figure 5 It is a structural schematic diagram for showing a positioning device.

[0035] In the figure, 1, portal frame; 11, column; 111, cross bar; 112, cross beam; 113, splicing beam; 114, splicing rod; 115, reinforcement frame; 116, first connecting flange; 117, first bolt; 118, first nut; 12, first rod body; 121, second rod body; 122, reinforcement rod; 123, first connecting rod; 124, second connecting rod; 125, second connecting flange; 126, third connecting flange; 127, second bolt; 128, second nut; 13, first insulator; 131. Suspension base; 132. First connecting rope; 133. First positioning ring clamp; 134. Second connecting rope; 135. Second positioning ring clamp; 136. Positioner; 137. Positioning clamp; 138. Suspension pulley; 14. First fixing rod; 141. Second fixing rod; 142. Fixing wire; 143. Second insulator; 144. Clamp; 145. Fourth connecting flange; 146. Fifth connecting flange; 147. Third bolt; 148. Third nut; 15. Contact wire; 16. Load-bearing cable. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] Combination Figure 1 and Figure 2 , which is a railway existing line contact network positioning and installation structure disclosed by the present invention, includes two portal frames 1, the two portal frames 1 are fixedly arranged on the roadbed and are respectively located on both sides of the track, the planes where the portal frames 1 on both sides are located are arranged parallel to each other, and each portal frame 1 includes two columns 11 and a cross bar 111 fixedly arranged between the ends of the two columns 11.

[0038] In this embodiment, the end of the column 11 is cast into the roadbed so that the column 11 is fixed to the roadbed. In other embodiments, the column 11 may be fixed with anchor screws.

[0039] Combination Figure 1 and Figure 3A cross beam 112 spanning over the track is arranged between the cross bars 111 of the portal frames 1 on both sides, and a positioning device for positioning the load-bearing cables 16 and the contact wires 15 of the contact network is arranged on the cross beam 112.

[0040] The portal frame 1 can be used to cross the culvert under the railway, thereby preventing the culvert from affecting the stability of the entire positioning device after installation. Construction workers do not need to modify or remove existing culverts or other structures, thereby reducing the amount of work and saving costs and project time.

[0041] Combination Figure 1 and Figure 3 In order to make the cross beam 112 suitable for railways of different widths, thereby improving the applicability of the installation structure, the cross beam 112 includes a plurality of spliced ​​beams 113 spliced ​​together.

[0042] Combination Figure 1 and Figure 3 In order to improve the strength of each spliced ​​beam 113 and the bearing effect on the positioning device, each spliced ​​beam 113 includes three spliced ​​rods 114 arranged in parallel with each other, and a plurality of reinforcement frames 115 are arranged between the three spliced ​​rods 114 of each spliced ​​beam 113. The planes where adjacent reinforcement frames 115 are located are parallel to each other and arranged at intervals. Each reinforcement frame 115 is arranged in an inverted triangle with the vertex facing downward. The length direction of the spliced ​​rod 114 is arranged perpendicular to the plane where the reinforcement frame 115 is located, and the three spliced ​​rods 114 are respectively located at the positions where the three vertices of the triangular reinforcement frame 115 are located.

[0043] Combination Figure 3 and Figure 4 In order to fix the adjacent spliced ​​beams 113 together, fixing members for fixing the adjacent spliced ​​beams 113 together are provided on the adjacent spliced ​​beams 113 .

[0044] Combination Figure 3 and Figure 4 The ends of the splicing rods 114 of adjacent splicing beams 113 that are close to each other are each provided with a first connecting flange 116, the splicing rods 114 are arranged perpendicular to the first connecting flange 116, and the fixing parts include a plurality of first bolts 117 and first nuts 118 for fixing the adjacent first connecting flanges 116 together.

[0045] In other embodiments, adjacent spliced ​​beams 113 may be fixed by welding.

[0046] Combination Figure 1 and Figure 2In order to improve the strength of the cross bar 111 and the bearing effect on the cross beam 112, the cross bar 111 includes a first rod body 12 and a second rod body 121 located below the first rod body 12 and arranged parallel to the first rod body 12. A plurality of reinforcing rods 122 are evenly arranged between the first rod body 12 and the second rod body 121 along the length direction of the cross bar 111. The two ends of each reinforcing rod 122 are respectively fixed on the first rod body 12 and the second rod body 121. The upper two splicing rods 114 of the three splicing rods 114 are fixed on the first rod body 12, and the lower one splicing rod 114 is fixed on the second rod body 121.

[0047] In this embodiment, the upper two splicing rods 114 of the three splicing rods 114 are fixedly arranged on the first rod body 12 by welding, and the lower splicing rod 114 is fixedly arranged on the second rod body 121 by welding.

[0048] Combination Figure 1 and Figure 2 In order to further improve the bearing effect of the second rod body 121 on the first rod body 12, thereby indirectly improving the bearing effect on the entire cross beam 112, the second rod body 121 includes a first connecting rod 123 and a second connecting rod 124 located at both ends of the connecting rod. The length direction of the first connecting rod 123 is set perpendicular to the length direction of the column 11, and the angle between the second connecting rod 124 and the first connecting rod 123 is set to be an obtuse angle. The end of the second connecting rod 124 away from the first connecting rod 123 is located at a position lower than the first connecting rod 123.

[0049] Combination Figure 1 and Figure 2 In order to detachably connect the first rod body 12 and the second rod body 121 to the two side columns 11, a second connecting flange 125 is provided on the column 11 and at the position where the ends of the first rod body 12 and the second connecting rod 124 are located, and a third connecting flange 126 is provided at the ends of the first rod body 12 and the second connecting rod 124. The second connecting flange 125 and the third connecting flange 126 are fixed by multiple second bolts 127 and multiple second nuts 128.

[0050] In other embodiments, the ends of the first rod body 12 and the second connecting rod 124 may be fixed to the two side columns 11 by welding.

[0051] Combination Figure 1 and Figure 5In order to fix the contact wire 15 of the contact network, thereby preventing the contact wire 15 from moving after the train pantograph contacts the contact wire 15, improving the contact effect between the train pantograph and the contact wire 15, and improving the power receiving quality of the train, the positioning device includes a first insulator 13, one end of the first insulator 13 is fixedly connected to the lowest splicing rod 114 through a suspension base 131, and the other end is provided with two first connecting ropes 132, and the ends of the two first connecting ropes 132 away from the first insulator 13 are both provided with first positioning ring clamps 133, and the first A second connecting rope 134 is respectively provided on the positioning ring clamp 133, and a second positioning ring clamp 135 is provided at the end of the second connecting rope 134 on both sides away from the first positioning ring clamp 137, a positioner 136 is provided on the second positioning ring clamp 135 on both sides, and a positioning clamp 137 is provided at the end of the positioner 136 on both sides away from the second positioning ring clamp 135, and a suspension pulley 138 is provided on the first positioning ring clamp 133 on both sides, the positioning clamp 137 is used for the contact wire 15 of the contact network to pass through, and the suspension pulley 138 is used for the load-bearing cable 16 to pass through.

[0052] In the present application, the suspension base 131, the first positioning ring wire clamp 133, the second positioning ring wire clamp 135, the positioning wire clamp 137 and the suspension pulley 138 are all installation and connection components of the contact wire 15 in the contact network commonly used by personnel in this field. Therefore, the specific structures of the suspension base 131, the first positioning ring wire clamp 133, the second positioning ring wire clamp 135, the positioning wire clamp 137 and the suspension pulley 138 will not be described in detail in the present application. In this embodiment, two positioning wire clamps 137 are used, which are suitable for the position of the turnout on the railway. In other embodiments, the number of positioning wire clamps 137 in the positioning device can be adjusted so that different numbers of positioning wire clamps 137 can be suitable for different railways.

[0053] Combination Figure 1 and Figure 2In order to fix the first positioning ring clamp 133 and the second positioning ring clamp 135, so as to prevent the first positioning ring clamp 133 and the second positioning ring clamp 135 from moving after the train pantograph contacts the contact line 15, thereby further improving the power quality of the train, a first fixing rod 14 and a second fixing rod 141 are arranged between the two columns 11 of each portal frame 1, the first fixing rod 14 is located below the second rod body 121, the second fixing rod 141 is located below the first fixing rod 14, and the first fixing rod 14 and the second fixing rod 141 are both connected to the first fixing rod 14. The first rod bodies 12 are arranged parallel to each other, and fixing wires 142 are arranged between the first fixing rods 14 and the second fixing rods 141 of the door frames 1 on both sides. The fixing wires 142 between the first fixing rods 14 on both sides pass through the first positioning ring clamp 133, and the fixing wires 142 between the second fixing rods 141 on both sides pass through the second positioning ring clamp 135. Second insulators 143 are arranged at both ends of the fixing wires 142, and the ends of the second insulators 143 away from the fixing wires 142 are fixedly arranged on the first rod body 12 and the second rod body 121 through clamps 144.

[0054] The two fixed wires 142 can respectively bear and fix the first positioning ring wire clamp 133 and the second positioning ring wire clamp 135, preventing the train pantograph from driving the first positioning ring wire clamp 133 and the second positioning ring wire clamp 135 to move after contacting the contact wire 15, further improving the fixing effect of the contact wire 15, thereby improving the power receiving quality of the train.

[0055] Combination Figure 1 and Figure 2 In order to detachably connect the first fixing rod 14 and the second fixing rod 141 to the two side columns 11, a fourth connecting flange 145 is provided on the column 11 and at the position where the ends of the first fixing rod 14 and the second fixing rod 141 are located, and a fifth connecting flange 146 is provided at both ends of the first fixing rod 14 and the second fixing rod 141. The fourth connecting flange 145 and the fifth connecting flange 146 are fixed to each other by a plurality of third bolts 147 and a plurality of third nuts 148.

[0056] The implementation principle of this embodiment is as follows: the portal frame 1 is used to cross the culvert under the railway, thereby preventing the culvert from affecting the stability of the entire positioning device after installation. Construction personnel do not need to modify the existing culvert or other structures, thereby reducing the amount of work and saving costs and engineering time; when the train pantograph contacts the contact wire 15, the two fixed wires 142 can respectively carry and fix the first positioning ring clamp 133 and the second positioning ring clamp 135, so that the contact wire 15 is guided and fixed, so that the train pantograph prevents the contact wire 15 from moving after contacting the contact wire 15, reduces the vibration amplitude of the positioning device when the train passes, improves the contact effect between the train pantograph and the contact wire 15 of the contact network, and thus improves the current collection quality of the train pantograph.

[0057] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A positioning and installation structure for an existing railway contact network, characterized in that: The invention comprises two portal frames (1), the two portal frames (1) are fixedly arranged on the roadbed and respectively located on both sides of the track, the planes where the portal frames (1) on both sides are located are arranged parallel to each other, each portal frame (1) comprises two columns (11) and a crossbar (111) fixedly arranged between the ends of the two columns (11), a crossbeam (112) spanning above the track is arranged between the crossbars (111) of the portal frames (1) on both sides, and a positioning device for positioning a load-bearing cable (16) and a contact wire (15) of the contact network is arranged on the crossbeam (112); the positioning device comprises a first insulator (13), the first insulator (13) 3) is fixedly connected to the lowest splicing rod (114) through a hanging base (131), and two first connecting ropes (132) are provided at the other end, and the ends of the two first connecting ropes (132) away from the first insulator (13) are provided with a first positioning ring clamp (133), and the first positioning ring clamps (133) on both sides are respectively provided with a second connecting rope (134), and the ends of the second connecting ropes (134) on both sides are away from the first positioning clamp (137) are provided with a second positioning ring clamp (135), and the second positioning ring clamps (135) on both sides are provided with a positioner (136), and the positioners (136) on both sides are away from the second The ends of the positioning ring wire clamp (135) are provided with positioning wire clamps (137), and the first positioning ring wire clamps (133) on both sides are provided with suspension pulleys, the positioning wire clamps (137) are used for passing the contact wire (15) of the contact network, and the suspension pulleys are used for passing the load-bearing cables (16); a first fixing rod (14) and a second fixing rod (141) are provided between the two uprights (11) of each of the portal frames (1), the first fixing rod (14) is located below the second rod body (121), the second fixing rod (141) is located below the first fixing rod (14), and the first fixing rod (14) and the second fixing rod (141) are both connected to the first rod body (121). The bodies (12) are arranged parallel to each other, and a fixing wire (142) is arranged between the first fixing rod (14) and the second fixing rod (141) of the door-shaped frames (1) on both sides, the fixing wire (142) between the first fixing rods (14) on both sides passes through a first positioning ring wire clamp (133), and the fixing wire (142) between the second fixing rods (141) on both sides passes through a second positioning ring wire clamp (135), and second insulators (143) are arranged at both ends of the fixing wire (142), and the end of the second insulator (143) away from the fixing wire (142) is fixedly arranged on the first rod body (12) and the second rod body (121) through a clamp (144).

2. The existing railway overhead contact network positioning and installation structure according to claim 1, characterized in that: The cross beam (112) comprises a plurality of spliced ​​beams (113) spliced ​​together, and adjacent spliced ​​beams (113) are provided with fixing members for fixing the adjacent spliced ​​beams (113) together.

3. The existing railway overhead contact network positioning and installation structure according to claim 2, characterized in that: Each of the spliced ​​beams (113) comprises three spliced ​​rods (114) arranged parallel to each other, a plurality of reinforcement frames (115) are arranged between the three spliced ​​rods (114) of each of the spliced ​​beams (113), the planes where the adjacent reinforcement frames (115) are located are parallel to each other and arranged at intervals, each of the reinforcement frames (115) is arranged in the shape of an inverted triangle with its vertex facing downwards, the length direction of the spliced ​​rods (114) is arranged perpendicular to the plane where the reinforcement frame (115) is located, and the three spliced ​​rods (114) are respectively located at the positions where the three vertices of the triangular reinforcement frame (115) are located.

4. The existing railway overhead contact network positioning and installation structure according to claim 3, characterized in that: The ends of the splicing rods (114) of adjacent splicing beams (113) that are close to each other are each provided with a first connecting flange (116), the splicing rods (114) are arranged perpendicular to the first connecting flange (116), and the fixing member includes a plurality of first bolts (117) and first nuts (118) for fixing the adjacent first connecting flanges (116) together.

5. The existing railway overhead contact network positioning and installation structure according to claim 1, characterized in that: The cross bar (111) comprises a first rod body (12) and a second rod body (121) located below the first rod body (12) and arranged in parallel with the first rod body (12); a plurality of reinforcing rods (122) are evenly arranged between the first rod body (12) and the second rod body (121) along the length direction of the cross bar (111); two ends of each reinforcing rod (122) are respectively fixedly arranged on the first rod body (12) and the second rod body (121); the two upper splicing rods (114) of the three splicing rods (114) are fixedly arranged on the first rod body (12), and the lower splicing rod (114) is fixedly arranged on the second rod body (121).

6. The existing railway overhead contact network positioning and installation structure according to claim 5, characterized in that: The second rod body (121) comprises a first connecting rod (123) and second connecting rods (124) located at both ends of the connecting rod, the length direction of the first connecting rod (123) is arranged perpendicular to the length direction of the column (11), the angle between the second connecting rod (124) and the first connecting rod (123) is arranged to be an obtuse angle, and the end of the second connecting rod (124) away from the first connecting rod (123) is arranged at a position lower than the first connecting rod (123).

7. The existing railway overhead contact network positioning and installation structure according to claim 6, characterized in that: A second connecting flange (125) is provided on the column (11) at the position where the ends of the first rod body (12) and the second connecting rod (124) are located, and a third connecting flange (126) is provided at the ends of the first rod body (12) and the second connecting rod (124), and the second connecting flange (125) and the third connecting flange (126) are fixed by a plurality of second bolts (127) and a plurality of second nuts (128).

8. The existing railway overhead contact network positioning and installation structure according to claim 1, characterized in that: A fourth connecting flange (145) is provided on the column (11) at a position where the ends of the first fixing rod (14) and the second fixing rod (141) are located, and a fifth connecting flange (146) is provided at both ends of the first fixing rod (14) and the second fixing rod (141), and the fourth connecting flange (145) and the fifth connecting flange (146) are fixed by a plurality of third bolts (147) and a plurality of third nuts (148).

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