Cantilever supporting device for overhead line system

Abstract

The utility model relates to the technical field of urban rail transit, in particular to an overhead line system cantilever supporting device which comprises supporting pipes and a damping device, and the damping device is arranged between the two supporting pipes. One end of each supporting pipe is a straight pipe, the other end of each supporting pipe is a right-angle bent pipe, one ends of the right-angle bent pipes of the two supporting pipes are connected to the damping device in a sleeving mode in the opposite directions, and the right-angle bent pipes of the two supporting pipes are parallel to each other and are perpendicular to the flat cantilever and the positioning pipe; one end of the straight pipe of one supporting pipe is arranged on the double-groove carrier cable seat, and one end of the straight pipe of the other supporting pipe is arranged on the positioning pipe; the damping device is additionally arranged at the position, between the flat cantilever and the positioning pipe, of the supporting pipe, so that force is concentrated in the damping device to be released when the overhead line system vibrates, the service life of all the cantilevers and the supporting pipe is prolonged, the problem of structural disassembly is not prone to occurring, accidents are reduced, and normal operation of a train is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of urban rail transit, in particular to a contact network wrist arm supporting device. Background Art

[0002] When trains are running in electrified urban rail transit systems, the contact network will vibrate. Under long-term vibration conditions, components are prone to loosening, causing the railway contact network to be unstable and prone to failure.

[0003] The invention application with the publication number CN115489399A discloses an integral insulating wrist device, wherein the outer peripheries of the flat wrist, oblique wrist, positioning tube, wrist support and positioning tube support are all provided with external threads; the inner walls of the main clamp 1, auxiliary clamp 1, main clamp 2, auxiliary clamp 2, horizontal clamp, main clamp 3 and auxiliary clamp 3 are all provided with internal threads. The external threads and the internal threads are engaged to prevent the wrist connector, the positioning tube connector and the load-bearing cable seat connector from slipping.

[0004] As in the above technical solution, the positioning tube support and the load-bearing cable seat are connected by threads. During long-term use, the threads on the positioning tube support and the load-bearing cable seat will suffer from conical wear due to long-term vibration, which may easily lead to screw failure, and then cause the positioning tube support to detach from the load-bearing cable seat, causing an accident. Utility Model Content

[0005] In view of this, the utility model proposes a contact network arm support device, which adds a damping device at the support tube between the flat arm and the positioning tube, so that the contact network concentrates the force in the damping device for release when vibrating, thereby increasing the service life of each arm and the support tube, making it less likely to have structural disintegration problems, reducing the occurrence of accidents, and ensuring normal operation of the train.

[0006] The technical solution of the utility model is achieved in this way:

[0007] The utility model provides a contact network arm support device, comprising a support column, a flat arm, an inclined arm and a positioning tube, wherein:

[0008] One end of the flat arm and the oblique arm are connected by a double-groove load-bearing cable seat, and the other end is arranged on the support column;

[0009] One end of the positioning tube is arranged at the middle of the oblique arm, and the other end is used to connect to the positioner;

[0010] It also includes a support tube and a damping device, wherein:

[0011] Two support tubes are provided, and the damping device is provided between the two support tubes;

[0012] One end of the support tube is a straight tube, and the other end is a right-angle bent tube. One end of the right-angle bent tubes of the two support tubes are respectively sleeved on the damping device in opposite directions, and the right-angle bent tubes of the two support tubes are parallel to each other and perpendicular to the flat wrist arm and the positioning tube;

[0013] One end of the straight tube of one of the support tubes is arranged on the double-groove load-bearing cable seat, and one end of the straight tube of the other support tube is arranged on the positioning tube.

[0014] On the basis of the above technical solution, preferably, the damping device comprises a cavity, a T-shaped slider, a slider sleeve and a cavity sleeve, wherein:

[0015] One end of the cavity is fixedly connected to the cavity sleeve;

[0016] One end of the T-shaped slider is slidably disposed in the cavity, and the other end is fixedly connected to the slider sleeve;

[0017] One end of the right-angle bent tube of one of the support tubes passes through the cavity sleeve and is fixedly connected, and one end of the right-angle bent tube of the other support tube passes through the slider sleeve and is fixedly connected.

[0018] On the basis of the above technical solution, preferably, the damping device further comprises a cover, an upper bar rail and a lower bar rail, wherein:

[0019] The cover body is detachably arranged outside the cavity;

[0020] The upper bar rail and the lower bar rail are arranged inside the cavity, and the upper bar rail and the lower bar rail are parallel to the axial direction of the right-angle bending tube of the support tube;

[0021] The side portion of the T-shaped sliding block is slidably disposed between the upper bar rail and the lower bar rail.

[0022] On the basis of the above technical solution, preferably, the damping device further includes a corrugated limiting groove and a toothed limiting protrusion, wherein:

[0023] The corrugated limiting groove is fixed on the inner top of the cavity;

[0024] The tooth-shaped limiting protrusion is arranged between the corrugated limiting groove and the T-shaped slider, and is fixed on the T-shaped slider;

[0025] The tooth-shaped limiting protrusion elastically abuts against the corrugated limiting groove.

[0026] On the basis of the above technical solution, preferably, the damping device further includes a rubber buffer block, wherein:

[0027] The rubber buffer blocks are arranged on both sides of the T-shaped sliding block and fixed on the inner wall of the cavity.

[0028] On the basis of the above technical solution, preferably, the tooth-shaped limiting protrusion is a rack, and the number of teeth of the rack is 4.

[0029] On the basis of the above technical solution, preferably, it also includes wrist-arm support, wherein:

[0030] The arm support is fixedly arranged between the flat arm and the oblique arm.

[0031] On the basis of the above technical solution, preferably, it further comprises a flexible cable and a corner clamping device, wherein:

[0032] The flexible cable is arranged in the straight tube of the support tube;

[0033] The corner clamping device is arranged in the right-angle bending tube of the support tube, and both ends of the flexible cable are fixed on the corner clamping device;

[0034] One end of the straight tube of the support tube is fixedly connected to the double-groove load-bearing cable seat by bolts;

[0035] The middle portion of the flexible cable is wound around the connecting bolts of the support tube and the double-groove load-bearing cable seat.

[0036] On the basis of the above technical solution, preferably, the corner clamping device comprises a long support frame, a short support frame, a movable clamping block, a fixed clamping block and a flexible joint, wherein:

[0037] The movable clamping block is movably arranged in the supporting tube;

[0038] The fixed clamping block is fixedly arranged in the support tube;

[0039] The flexible joint is arranged between the movable clamping block and the fixed clamping block, and one end of the flexible joint is fixedly connected to the movable clamping block, and the other end is fixedly connected to the fixed clamping block;

[0040] One end of the long support frame and the short support frame is fixedly arranged on the movable clamping block, and the other end extends into the right angle section of the right angle bending tube of the support tube;

[0041] The two free ends of the flexible cable are arranged in parallel, and one free end of the flexible cable is fixedly connected to the long support frame, and the other free end of the flexible cable is fixedly connected to the short support frame.

[0042] On the basis of the above technical solution, preferably, a vertical reinforcement is provided between the long support frame and the short support frame.

[0043] The contact network arm support device of the utility model has the following beneficial effects compared with the prior art:

[0044] (1) By adding a damping device to the support tube between the flat arm and the positioning tube, the contact network can concentrate the force in the damping device and release it when vibration occurs, thereby increasing the service life of each arm and support tube, making it less likely to cause structural disintegration, reducing the occurrence of accidents, and ensuring normal operation of the train.

[0045] (2) By arranging a flexible cable in the support tube, and winding the middle part of the flexible cable around the connecting bolts between the support tube and the double-groove load-bearing cable seat, it is convenient to enhance the strength of the support tube through the flexible cable. When problems occur in the installation of the support tube, the flexible cable can be used to maintain the effective connection between the support tube and the double-groove load-bearing cable seat, thereby reducing the occurrence of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 It is a structural schematic diagram of a contact network wrist arm support device of the utility model;

[0048] Figure 2 It is a structural schematic diagram of the damping device of the utility model;

[0049] Figure 3 for Figure 2 AA section view;

[0050] Figure 4 for Figure 3 A partial enlarged view of

[0051] Figure 5 This is a schematic diagram of the structure of the support tube of the utility model;

[0052] Figure 6 It is a structural schematic diagram of the corner clamping device of the utility model;

[0053] In the figure: 1. pillar; 2. flat wrist arm; 3. wrist arm support; 4. oblique wrist arm; 5. support connector; 6. support tube; 7. damping device; 8. flexible cable; 9. corner clamping device; 10. double-groove load-bearing cable seat; 11. positioning tube; 12. positioner; 71. cavity; 72. T-shaped slider; 73. slider sleeve; 74. cavity sleeve; 75. corrugated limit groove; 76. toothed limit protrusion; 77. rubber buffer block; 78. cover body; 79. bolt hole; 91. long support frame; 92. short support frame; 93. movable clamping block; 94. fixed clamping block; 95. flexible joint; 711. upper bar rail; 712. lower bar rail. DETAILED DESCRIPTION

[0054] The following will be combined with the specific implementation of the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0055] like Figure 1-6 As shown, a contact network arm support device of the utility model adopts a support tube 6 between the flat arm 2 and the positioning tube 11 to add a damping device 7 to prevent long-term vibration from being concentrated on the threaded connection, thereby causing loosening, slipping or even falling out, leading to breakage, so as to solve the problems existing in the above-mentioned prior art. When the contact network vibrates, the force is concentrated in the damping device 7 for release, thereby increasing the service life of each arm and the support tube 6, preventing structural disintegration, and ensuring normal operation of the train.

[0056] The above contact network arm support device includes two embodiments, which are specifically described as follows.

[0057] Embodiment 1:

[0058] like Figure 1-4 As shown, this embodiment provides a contact network arm support device, including a pillar 1, a flat arm 2, an oblique arm 4, an arm support 3, a positioning tube 11 and a positioner 12, the pillar 1 is respectively connected with the flat arm 2 and the oblique arm 4, the arm support 3 is connected between one end of the flat arm 2 close to the pillar 1 and the middle part of the oblique arm 4 through a support connector 5, the other end of the flat arm 2 is connected with a double-groove load-bearing cable seat 10, the end of the oblique arm 4 away from the pillar 1 is connected to the lower part of the double-groove load-bearing cable seat 10, one end of the positioning tube 11 is connected to the support connector 5 of the oblique arm 4, and the other end of the positioning tube 11 is connected with the positioner 12.

[0059] The prior art adopts a double-groove load-bearing cable seat 10 to change the single fixation of the positioner 12 support. However, during the stress transfer concentration and subsequent continuous vibration process of the train passing through instantaneous contact, the fixed connection of the double-groove load-bearing cable seat 10 can only solve the local vibration thread loosening, but will affect other places where the thread is connected separately, and cannot fundamentally solve the problem. The problem of stress concentration release cannot be overcome.

[0060] like Figure 1 As shown, in this embodiment, the lower part of the double-groove load-bearing cable seat 10 and the upper part of the positioner 12 are connected with a support tube 6, and the ends of the two support tubes 6 are respectively sleeved on the damping device 7 in opposite directions, as shown in FIG. Figure 5 As shown, one end of the support tube 6 is a straight tube, and the other end is a right-angle bend tube. One end of the right-angle bend tubes of the two support tubes 6 is sleeved on the slider sleeve 73 and the cavity sleeve 74 one by one, and the exposed part of one end of the right-angle bend tubes of the two support tubes 6 sleeved on the slider sleeve 73 and the cavity sleeve 74 is radially locked by bolts. The right-angle bend tubes sleeved in the damping device 7 are parallel to each other and perpendicular to the flat arm 2 and the positioning tube 11. When the subway contacts the contact network, the two support tubes 6 are sleeved on the damping device 7 in opposite directions, so that the instantaneous force generated is consumed by the damping device 7, thereby preventing stress from being concentrated in other positions. When the contact network vibrates for a long time, since the two sides of the damping device 7 are sleeved on the damping device 7 by the support tubes 6, they are not fixedly connected, so the vibration energy can be continuously absorbed.

[0061] like Figure 2 and 3 As shown, the damping device 7 of this embodiment includes a cavity 71, a cover 78 and a T-shaped slider 72. The T-shaped slider 72 is embedded in the cavity 71. The cover 78 is installed on the outside of the cavity 71 with bolts through four bolt holes 79 opened at corresponding positions of the cover 78 and the cavity 71. An upper bar rail 711 and a lower bar rail 712 are arranged on the inside of the cavity 71, and an upper bar rail 711 and a lower bar rail 712 are correspondingly arranged on the inside of the cover 78. In this way, the cover 78 and the cavity 71 form a guide rail together, and the T-shaped slider 72 is embedded between the upper bar rail 711 and the lower bar rail 712. Figure 3 As shown, a toothed limiting protrusion 76 is provided on the top of the T-shaped slider 72. The toothed limiting protrusion 76 of the present embodiment is a rack, and the rack teeth are provided with 4. The number of teeth of the present embodiment is 4. A corrugated limiting groove 75 is provided downwardly from the top of the cavity 71. The toothed limiting protrusion 76 is offset against the corrugated limiting groove 75, so that when not subjected to a large instantaneous force, it can stably engage to ensure the stability of the damping device 7 and will not slide left and right at will.

[0062] like Figure 3 and 4As shown, rubber buffer blocks 77 are provided on the inner side of the cavity 71 of the present embodiment. Specifically, the rubber buffer blocks 77 are arranged on the inner walls of the inner cavity at both ends of the left and right displacement of the T-shaped slider 72. Since the toothed limiting protrusions 76 on the T-shaped slider 72 of the present embodiment can overcome the corrugated limiting grooves 75 and move along the left or right straight line, when the toothed limiting protrusions 76 are translated to the left or right by a distance of a tooth pitch, they will counteract the rubber buffer blocks 77 to play a buffering role, thereby preventing hard contact from damaging the damping device 7 or damaging the support tube 6. Therefore, the rubber buffer blocks 77 are arranged on the lower side of the toothed limiting protrusions 76, which can reduce the buffering torque and further increase the stability of the T-shaped slider 72 after movement.

[0063] like Figure 1 and 3 As shown, the T-shaped slider 72 of this embodiment is externally connected with a slider sleeve 73, and a cavity sleeve 74 is arranged outside the cavity 71. The slider sleeve 73 and the cavity sleeve 74 are both used to sleeve the right-angle bend tube of the support tube 6. In this way, the right-angle bend tube of the support tube 6 is sleeved with the slider sleeve 73 and the cavity sleeve 74, and is not fixedly connected. Moreover, the two right-angle bend tubes are perpendicular to the plane formed by the wrist arm, thereby ensuring that the forces on the damping device 7 are opposite. Although the part of the right-angle bend tube extending out of the slider sleeve 73 and the cavity sleeve 74 is locked by bolts, the sleeve can be rotated to consume the energy generated by vibration.

[0064] When the subway passes through the contact network, if the speed is fast and the instantaneous force is large, the toothed limiting protrusion 76 of the T-shaped slider 72 in the damping device 7 can overcome the corrugated limiting groove 75 and move along the left straight line through the mutual force of the support tube 6, and touch the rubber buffer block 77 for stability. Since the right-angle bending tube is sleeved on the slider sleeve 73 and the exposed part of the cavity sleeve 74 is radially locked by bolts, the subway can also change the direction through the mutual force of the support tube 6. The toothed limiting protrusion 76 of the T-shaped slider 72 in the damping device 7 can overcome the corrugated limiting groove 75 and move along the right straight line. The two directions can not only be adapted, but also ensure that the toothed limiting protrusion of the T-shaped slider 72 will not be fixed in the same position, but can be changed in the middle, on both sides, or even in different force directions, thereby preventing large and concentrated stress from causing local damage to the wrist-arm support device.

[0065] When the railway continues to pass through the contact network, the speed is uniform and the vibration generated is also uniform. There is no instantaneous excessive acceleration. Such continuous vibration can dissipate energy through the rotatable connection between the support tube 6 and the damping device 7, preventing the entire device from being continuously stressed, causing continuous damage to components in vulnerable positions, and then causing fractures, etc., thereby ensuring the safe operation of the subway.

[0066] Embodiment 2:

[0067] like Figure 5-6 As shown, this embodiment proposes a contact network arm support device on the basis of the first embodiment, which can increase the connection strength between the flat arm 2 and the positioning tube 11. The use of flexible traction can not only increase the service life, but also prevent the contact network support tube from breaking and causing the positioning tube 11 to detach, ensuring that the contact network will not have a greater impact.

[0068] like Figure 5 As shown, a flexible cable 8 is provided in the support tube 6 of the present embodiment, and one end of the flexible cable 8 is wrapped around the periphery of the mounting hole at the end of the straight tube. The straight tube end of the support tube 6 can not only be fixed to the flat wrist arm 2 and the positioning tube 11 through the bolts and the mounting hole, but also can further increase the strength of the flexible cable 8 wrapped around the periphery of the mounting hole. The two free ends of the flexible cable 8 are connected to the corner clamping device 9, so that the support tube 6 is not only a fixed support, but also can add an extra layer of strength through the internal flexible cable 8, and even if there is a problem with the mounting hole of the support tube 6, the flexible cable 8 can still be wrapped around the bolt to ensure its connection, and will not lose the connection due to the breakage of the support tube 6.

[0069] like Figure 6 As shown, the corner clamping device 9 of this embodiment is installed in the right-angle bending tube of the support tube 6. The corner clamping device 9 includes a long support frame 91, a short support frame 92, a movable clamping block 93 and a fixed clamping block 94. The movable clamping block 93 is installed at the flat section end of the right-angle bending tube. The size of the movable clamping block 93 is not enough to be completely fixed in the support tube 6. The purpose of such installation is to ensure that the movable clamping block 93 has a certain vertical vibration space to prevent stress concentration in the bending section from causing the tube to break. A fixed clamping block 94 is arranged in the direction from the flat section end to the free end. The fixed clamping block 94 of this embodiment is fixedly arranged in the right-angle bending tube. The movable clamping block 93 is connected to the fixed clamping block 94 through a flexible joint 95. The flexible joint 95 of this embodiment is an elastic rod. In this way, the fixed clamping block 94 can connect the movable clamping block 93 through the elastic rod without affecting its vertical displacement.

[0070] like Figure 6 As shown, one end of the long support frame 91 and the short support frame 92 of the present embodiment are both arranged on the movable clamping block 93, and the other ends of the long support frame 91 and the short support frame 92 extend into the right-angle section of the right-angle bending tube. The inner one of the two free ends of the flexible cable 8 is connected to the short support frame 92, and the outer one is connected to the long support frame 91. In this way, the two free ends of the flexible cable 8 are arranged in parallel without any interference. Even in the event of vibration or other circumstances, they can each achieve a good pulling effect without affecting each other.

[0071] In this embodiment, two vertical reinforcements are arranged between the long support frame 91 and the short support frame 92, which can reduce the physical interference caused by the non-resonance of the long support frame 91 and the short support frame 92 and avoid intersection. In addition, an inclined sheet metal fixing is also arranged between the short support frame 92 and the movable clamping block 93 to further increase the pulling strength and stability of the short support frame 92. Moreover, the long support frame 91 and the short support frame 92 themselves are also reinforced, so it is also a disguised reinforcement for the long support frame 91.

[0072] A contact network arm support device of the present embodiment can further increase stability on the basis of the first embodiment, prevent further impact caused by severe wear and tear of the first embodiment at the end of its service life, will not directly cause accidents to the contact network, can ensure its normal use, and is easy to discover and replace. It can also increase the service life of the first embodiment and ensure the safe operation of the subway.

[0073] The use method of the contact network wrist arm support device of the utility model is as follows:

[0074] First, install the flat arm 2 and the oblique arm 4 on the pillar 1, connect the arm support 3 through the support connector 5, ensure that the other end of the flat arm 2 is connected to the double-groove load-bearing cable seat 10, and the end of the oblique arm 4 is connected to the lower part of the double-groove load-bearing cable seat 10, one end of the positioning tube 11 is connected to the support connector 5 of the oblique arm 4, and the other end is connected to the positioner 12.

[0075] Then, the support tube 6 is connected to the lower part of the double-groove load-bearing cable seat 10 and the upper part of the positioner 12. The ends of the support tube 6 are sleeved on the damping device 7 in opposite directions. The right-angle bent tube part is radially locked to the exposed parts of the slider sleeve 73 and the cavity sleeve 74 by bolts to ensure that the support tubes 6 are parallel to each other and perpendicular to the flat wrist arm 2 and the positioning tube 11.

[0076] When the train passes over the contact network, the toothed limiting protrusion 76 of the T-shaped slider 72 in the damping device 7 can overcome the corrugated limiting groove 75 and move along a straight line to the left and right, and is stabilized by the rubber buffer block 77, effectively dispersing and absorbing the energy of instantaneous force and continuous vibration.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A contact network arm support device, comprising a support column (1), a flat arm (2), an inclined arm (4) and a positioning tube (11), wherein: One end of the flat arm (2) and the oblique arm (4) are connected via a double-groove load-bearing cable seat (10), and the other end is arranged on the support column (1); One end of the positioning tube (11) is arranged in the middle of the oblique arm (4), and the other end is used to connect to the positioner (12); It is characterized in that it also includes a support tube (6) and a damping device (7), wherein: Two support tubes (6) are provided, and the damping device (7) is provided between the two support tubes (6); One end of the support tube (6) is a straight tube, and the other end is a right-angle bent tube. One end of the right-angle bent tubes of the two support tubes (6) are respectively sleeved on the damping device (7) in opposite directions, and the right-angle bent tubes of the two support tubes (6) are parallel to each other and perpendicular to the flat wrist arm (2) and the positioning tube (11); One end of the straight tube of one of the support tubes (6) is arranged on the double-groove load-bearing cable seat (10), and one end of the straight tube of the other support tube (6) is arranged on the positioning tube (11).

2. A contact network arm support device according to claim 1, characterized in that: The damping device (7) comprises a cavity (71), a T-shaped slider (72), a slider sleeve (73) and a cavity sleeve (74), wherein: One end of the cavity (71) is fixedly connected to the cavity sleeve (74); One end of the T-shaped slider (72) is slidably disposed in the cavity (71), and the other end is fixedly connected to the slider sleeve (73); One end of the right-angled bend tube of one of the support tubes (6) passes through the cavity sleeve (74) and is fixedly connected, and one end of the right-angled bend tube of the other support tube (6) passes through the slider sleeve (73) and is fixedly connected.

3. A contact network arm support device as claimed in claim 2, characterized in that: The damping device (7) further comprises a cover (78), an upper bar-shaped rail (711) and a lower bar-shaped rail (712), wherein: The cover (78) is detachably arranged outside the cavity (71); The upper bar-shaped rail (711) and the lower bar-shaped rail (712) are arranged on the inner side of the cavity (71), and the upper bar-shaped rail (711) and the lower bar-shaped rail (712) are parallel to the axial direction of the right-angle bent tube of the support tube (6); The side portion of the T-shaped sliding block (72) is slidably disposed between the upper bar-shaped rail (711) and the lower bar-shaped rail (712).

4. A contact network arm support device as claimed in claim 3, characterized in that: The damping device (7) further comprises a corrugated limiting groove (75) and a toothed limiting protrusion (76), wherein: The corrugated limiting groove (75) is fixed on the inner top of the cavity (71); The toothed limiting protrusion (76) is arranged between the corrugated limiting groove (75) and the T-shaped sliding block (72), and is fixed on the T-shaped sliding block (72); The tooth-shaped limiting protrusion (76) elastically abuts against the corrugated limiting groove (75).

5. A contact network arm support device as claimed in claim 4, characterized in that: The damping device (7) further comprises a rubber buffer block (77), wherein: The rubber buffer blocks (77) are arranged on both sides of the T-shaped sliding block (72) and fixed on the inner wall of the cavity (71).

6. A contact network arm support device as claimed in claim 5, characterized in that: The tooth-shaped limiting protrusion (76) is a rack, and the number of teeth on the rack is 4.

7. A contact network arm support device as claimed in claim 6, characterized in that: Also included is a wrist-arm support (3), wherein: The wrist support (3) is fixedly arranged between the flat wrist (2) and the oblique wrist (4).

8. A contact network arm support device as claimed in claim 1 or 7, characterized in that: It also includes a flexible cable (8) and a corner clamping device (9), wherein: The flexible cable (8) is arranged in the straight tube of the support tube (6); The corner clamping device (9) is arranged in the right-angle bending tube of the support tube (6), and both ends of the flexible cable (8) are fixed on the corner clamping device (9); One end of the straight tube of the support tube (6) is fixedly connected to the double-groove load-bearing cable seat (10) by means of bolts; The middle part of the flexible cable (8) is wound around the connecting bolts of the support tube (6) and the double-groove load-bearing cable seat (10).

9. A contact network arm support device as claimed in claim 8, characterized in that: The corner clamping device (9) comprises a long support frame (91), a short support frame (92), a movable clamping block (93), a fixed clamping block (94) and a flexible joint (95), wherein: The movable clamping block (93) is movably arranged in the support tube (6); The fixed clamping block (94) is fixedly arranged in the support tube (6); The flexible joint (95) is arranged between the movable clamping block (93) and the fixed clamping block (94), and one end of the flexible joint (95) is fixedly connected to the movable clamping block (93), and the other end is fixedly connected to the fixed clamping block (94); One end of the long support frame (91) and the short support frame (92) is fixedly arranged on the movable clamping block (93), and the other end extends into the right-angle section of the right-angle bending tube of the support tube (6); The two free ends of the flexible cable (8) are arranged in parallel, and one free end of the flexible cable (8) is fixedly connected to the long support frame (91), and the other free end is fixedly connected to the short support frame (92).

10. A contact network arm support device according to claim 9, characterized in that: A vertical reinforcement member is provided between the long support frame (91) and the short support frame (92).

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