Contact line support

Abstract

This invention discloses a contact wire support post, comprising a post body, on which a horizontal cantilever arm and a diagonal cantilever arm are mounted. Insulators are bolted to both the horizontal and diagonal cantilever arms. A locking mechanism is provided at the intersection of the horizontal and diagonal cantilever arms. A traction arm is rotatably mounted on the post body. By providing the traction arm, when it is necessary to replace the insulator on the cantilever arm, the worker rotates the traction arm from the side of the post body, causing the end of the traction arm to insert into the locking mechanism. The locking mechanism locks the traction arm. At this time, the horizontal and diagonal cantilever arms are diagonally pulled onto the post body by the traction arm, eliminating the need for the worker to move along the diagonal cantilever arm to the bottom of the catenary cable to install the wire sleeve. This facilitates insulator replacement and improves safety during insulator replacement.

Description

Technical Field

[0001] This invention relates to the field of railway catenary equipment technology, specifically to a catenary support post. Background Technology

[0002] Contact line supports are structural components used to support the contact network. Installed on either side or in the middle of the track, they support the contact wires and related equipment, ensuring the stability and reliability of the contact network. Contact line supports are equipped with cantilever assemblies, typically consisting of horizontal and diagonal cantilever arms. Insulators are installed on these cantilever assemblies to prevent current leakage through the cantilever assemblies or supports to the ground or other equipment, thus avoiding electrical short circuits and electric shock accidents. During long-term operation, insulators need to withstand the tension of the contact wire, wind force, and other mechanical loads. Prolonged stress can cause material fatigue in the insulators, leading to a decrease in their strength. When the insulator's strength decreases to a certain level, it can no longer withstand normal mechanical loads and is prone to breakage. Therefore, insulators need to be replaced periodically.

[0003] For example, the patent with publication number CN222613988U and publication date March 14, 2025 discloses a catenary support for easy maintenance based on a high platform. It includes a column, a column base at the lower end of the column, a crossbeam fixedly connected to the upper side of the column for installing high voltage conductors, an insulating mounting component fixedly inserted on the crossbeam, a protective wall on the side of the column base, a railing fixedly connected to the upper side of the protective wall, a patterned steel plate on the upper inner wall of the protective wall, and a support protection device, which is set between the protective wall and the column base.

[0004] When replacing insulators on existing cantilever arms, a wire sleeve needs to be installed between the cantilever arm and the support post. This allows the cantilever arm to be suspended during insulator removal, facilitating construction. However, when installing the wire sleeve, workers need to move along the inclined cantilever arm at a high altitude to the vicinity of the catenary base, wrap the wire sleeve around the catenary base to secure it, and then return to the support post. After gradually tightening the wire sleeve with a lever hoist to suspend the cantilever arm, workers can then proceed with the insulator replacement. Installing the wire sleeve at a high altitude wastes a significant amount of time and requires moving a considerable distance along the inclined cantilever arm, posing certain safety hazards. Summary of the Invention

[0005] The purpose of this invention is to provide a catenary support to overcome the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The overhead contact line support includes a support body on which a horizontal cantilever arm and a diagonal cantilever arm are mounted. Insulators are bolted to both the horizontal and diagonal cantilever arms. A connection locking mechanism is provided at the intersection of the horizontal and diagonal cantilever arms. A traction arm is rotatably mounted on the support body. When the end of the traction arm is inserted into the connection locking mechanism, the mechanism locks the traction arm. Both the horizontal and diagonal cantilever arms are diagonally pulled onto the support body by the traction arm.

[0008] As described above, the traction arm includes a separable rotating section and a connecting section. The rotating section is rotatably connected to the support body via a first rotating shaft. A thread is provided on the side wall of the rotating section away from the support body. The connecting section is sleeved on the outside of the rotating section, and the connecting section and the rotating section are threadedly connected.

[0009] The aforementioned connection locking mechanism includes a connection frame and a locking part disposed therein. The horizontal wrist arm and the inclined wrist arm both pass through the connection frame. The connection frame has an insertion hole for inserting the traction arm. When the connection segment is inserted into the insertion hole, the connection segment is turned, and the locking part locks the connection segment.

[0010] As described above, the locking part includes a locking bolt, which is coaxially arranged with the insertion hole. The end of the connecting section away from the rotating section is provided with a threaded hole that matches the locking bolt. When the connecting section rotates, the locking bolt is screwed into the threaded hole to fix the connecting section.

[0011] As mentioned above, the main body of the support column is provided with a placement groove for placing the traction arm.

[0012] As described above, the horizontal wrist arm and the oblique wrist arm are rotatably mounted on the support body via a second rotating shaft. The axial direction of the second rotating shaft is parallel to the axial direction of the support body. The support body is provided with two sets of limiting parts, which correspond to the horizontal wrist arm and the oblique wrist arm, respectively.

[0013] As described above, the main body of the support column is also provided with a locking cavity, which is connected to the top of the placement groove. The limiting part includes two limiting blocks, which are rotatably mounted on the main body of the support column via a third rotating shaft. The third rotating shaft is connected to the main body of the support column via a torsion spring. The third rotating shaft divides the limiting blocks into two parts. One part is located on both sides of the corresponding horizontal or oblique wrist arm, which is used to limit the rotation angle of the corresponding horizontal or oblique wrist arm. The other part extends into the locking cavity.

[0014] As described above, the limiting blocks are rotatably mounted on the support body, and the support body is also provided with an adjustment mechanism. Based on the rotation of the traction arm, the adjustment mechanism adjusts the two limiting blocks to clamp the corresponding horizontal or oblique wrist arm, thereby limiting the rotation of the horizontal and oblique wrist arms.

[0015] The aforementioned adjustment mechanism includes a trigger slide rod that is slidably installed in the locking cavity in the vertical direction. A return spring is connected between the trigger slide rod and the main body of the support column. Two compression wedges are provided on the trigger slide rod. The two compression wedges are arranged vertically at intervals, and the two compression wedges correspond one-to-one with the two sets of limiting parts.

[0016] As described above, the squeezing wedge is in the shape of an inverted cone. Based on the downward movement of the trigger slide, the inverted cone squeezing wedge squeezes the two corresponding limiting blocks. Based on the inclined surface of the inverted cone of the squeezing wedge, the two limiting blocks gradually close together and clamp the corresponding horizontal or inclined wrist arm.

[0017] The beneficial effects of this invention are as follows: In the above technical solution, the contact wire support provided by this invention, by setting a traction arm, when it is necessary to replace the insulator on the cantilever arm, the worker rotates the traction arm on the main body of the support, so that the end of the traction arm is inserted into the connecting locking mechanism, and the connecting locking mechanism locks the traction arm. At this time, the horizontal cantilever arm and the inclined cantilever arm are suspended on the main body of the support through the traction arm, and the worker does not need to move along the inclined cantilever arm to the bottom of the catenary cable to install the wire sleeve, which facilitates the worker to replace the insulator and improves the safety of the worker when replacing the insulator. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the structure of the overhead contact line support provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the connection state between the traction arm and the connecting locking mechanism provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the traction arm and the locking frame when they are connected, as provided in an embodiment of the present invention.

[0022] Figure 4A schematic diagram showing the connection between the horizontal wrist arm, the inclined wrist arm, and the support body, provided for another embodiment of the present invention;

[0023] Figure 5 Provided for another embodiment of the present invention Figure 4 Enlarged view of point A;

[0024] Figure 6 A schematic diagram of the adjustment mechanism provided in another embodiment of the present invention;

[0025] Figure 7 Provided for another embodiment of the present invention Figure 6 Enlarged view of point B;

[0026] Figure 8 This is a schematic diagram showing the state of the limiting block when it is open, according to another embodiment of the present invention.

[0027] Figure 9 This is a schematic diagram showing the state when the limiting block clamps the corresponding wrist arm, according to another embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Support body; 2. Horizontal cantilever arm; 3. Inclined cantilever arm; 4. Insulator; 5. Connecting and locking mechanism; 51. Connecting frame; 52. Locking part; 53. Insertion hole; 6. Traction arm; 61. Rotating section; 62. Connecting section; 63. First rotating shaft; 64. Threaded hole; 7. Second rotating shaft; 8. Limiting part; 81. Limiting stop; 82. Third rotating shaft; 9. Adjusting mechanism; 91. Trigger slide bar; 92. Compression wedge; 93. Return spring; 10. Placement groove; 11. Locking cavity. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of the present invention, the following will be described in conjunction with the appendix. Figure 1-9 The present invention will be described in further detail below.

[0031] This invention provides a contact wire support post, comprising a post body 1, on which a horizontal cantilever arm 2 and a diagonal cantilever arm 3 are mounted. Insulators 4 are bolted to both the horizontal cantilever arm 2 and the diagonal cantilever arm 3. A connecting locking mechanism 5 is provided at the intersection of the horizontal cantilever arm 2 and the diagonal cantilever arm 3. A traction arm 6 is rotatably mounted on the post body 1. When the end of the traction arm 6 is inserted into the connecting locking mechanism 5, the connecting locking mechanism 5 can lock the traction arm 6. Both the horizontal cantilever arm 2 and the diagonal cantilever arm 3 are diagonally pulled onto the post body 1 by the traction arm 6.

[0032] Specifically, the main support 1 is preferably made of steel, and the cross-section of the main support 1 is rectangular. The main support 1 is vertically installed on the ground. The horizontal cantilever arm 2 is arranged horizontally or substantially horizontally on the main support 1. One end of the horizontal cantilever arm 2 is connected to the main support 1. The oblique cantilever arm 3 is arranged obliquely on the main support 1. The oblique cantilever arm 3 is located below the horizontal cantilever arm 2. One end of the oblique cantilever arm 3 is connected to the main support 1, and the other end of the oblique cantilever arm 3 is connected to the end of the horizontal cantilever arm 2 away from the main support 1. At this time, the main support 1, the horizontal cantilever arm 2, and the oblique cantilever arm 3 form a stable triangular support structure. The insulator 4 is installed on the side of the horizontal cantilever arm 2 and the oblique cantilever arm 3 close to the main support 1 by means of bolt connection.

[0033] When it is necessary to replace insulator 4, the worker climbs to the top area of ​​the main support 1. Then, the worker moves along the inclined cantilever arm 3 away from the main support 1 until he reaches the vicinity of the catenary base (the catenary base is used to support and fix the catenary. In some cantilever arm structures, the catenary base is bolted to the side of the cantilever arm away from the main support 1 to ensure stable support of the catenary. This is existing technology, and its principle will not be elaborated). Then, the worker loops a steel wire around the catenary base to fix it and returns to the main support 1. Then, the worker uses a lever hoist to quickly lower and tighten the steel wire loop to suspend the entire cantilever arm assembly before replacing the insulator 4 on the cantilever arm.

[0034] The shortcoming of the existing technology is that when the workers install the wire sleeve, they need to move a certain distance along the inclined bracket 3 and get close to the catenary base before they can wrap the wire sleeve around the catenary base and replace the insulator 4. Since the replacement of the insulator 4 on the contact wire support is a high-altitude operation, there are certain safety hazards when the workers move along the inclined bracket 3 at high altitude.

[0035] In this embodiment, a traction arm 6 is rotatably mounted on the support body 1. The traction arm 6 is generally straight, and a connecting locking mechanism 5 is provided at the intersection of the horizontal arm 2 and the inclined arm 3. This connecting locking mechanism 5 is used to fix the end of the traction arm 6 away from the support body 1. When it is necessary to replace the insulator 4, the worker climbs to the top area of ​​the support body 1. Then, the worker rotates the traction arm 6 so that the open end of the traction arm 6 is inserted into the connecting locking mechanism 5, which fixes the traction arm 6 in place (the connecting locking mechanism 5 can be fixed by magnetic attraction, spring pin, etc.). At this time, the horizontal arm 2 and the inclined arm 3 are obliquely pulled on the support body 1 by the traction arm 6. Afterwards, when replacing the insulator 4, the worker does not need to move along the inclined arm 3 to the bottom of the catenary to install the wire sleeve. The worker only needs to climb on the support body 1 to replace the insulator 4, which greatly improves the safety of replacing the insulator 4 at high altitude.

[0036] Preferably, the traction arm 6 includes a retractable rotating section 61 and a connecting section 62. The rotating section 61 is rotatably connected to the support body 1 via a first rotating shaft 63. A thread is provided on the side wall of the rotating section 61 at the end furthest from the support body 1. The connecting section 62 is sleeved on the outside of the rotating section 61, and the connecting section 62 is threadedly connected to the rotating section 61. The connection locking mechanism 5 includes a connecting frame 51 and a locking part 52 disposed therein. The horizontal wrist arm 2 and the inclined wrist arm 3 both pass through the connecting frame 51. The connecting frame 51 has an insertion point for the connecting section 62 of the traction arm 6 to be inserted. When the end of the connecting segment 62 away from the support body 1 is aligned with the insertion hole 53, the connecting segment 62 is screwed in, and the end of the connecting segment 62 away from the support body 1 is gradually inserted into the insertion hole 53. The locking part 52 locks the connecting segment 62. The locking part 52 preferably includes a locking bolt, which is coaxially arranged with the insertion hole 53. A threaded hole 64 adapted to the locking bolt is opened on the end of the connecting segment 62 away from the rotating segment 61. When the connecting segment 62 rotates in the insertion hole 53, the locking bolt is screwed into the threaded hole 64 to fix the connecting segment 62.

[0037] Specifically, the axial direction of the first rotating shaft 63 is perpendicular to the axial direction of the support body 1. When the insulator 4 needs to be replaced, the worker climbs to the top of the support body 1 and then rotates the traction arm 6 so that the end of the connecting section 62 away from the rotating section 61 is aligned with the insertion hole 53 on the connecting frame 51. Then, the worker screws the connecting section 62. Because the connecting section 62 and the rotating section 61 are connected by a threaded connection, as the connecting section 62 rotates, the connecting section 62 and the rotating section 61 gradually separate (equivalent to the length of the traction arm 6 gradually increasing). As the connecting section 62 is gradually inserted into the insertion hole 53 on the connecting frame 51, the connecting section 62 is then continuously turned. The locking bolt located in the connecting frame 51 is gradually inserted into the threaded hole 64 at the end of the rotating section 61, forming a threaded connection. At this time, the locking bolt in the connecting frame 51 and the threaded hole 64 at the end of the connecting section 62 are threadedly fixedly connected, and the connecting section 62 and the rotating section 61 are threadedly fixedly connected. When the workers need to disassemble the insulator 4 on the horizontal cantilever arm 2 and the inclined cantilever arm 3, the traction arm 6 will suspend the horizontal cantilever arm 2 and the inclined cantilever arm 3 to ensure that the replacement of the insulator 4 can be carried out smoothly.

[0038] In this embodiment, the use of threaded connection for fixing is simple and direct. The connecting section 62 is simply screwed into the insertion hole 53 on the connecting frame 51, and the locking bolt in the connecting frame 51 is threaded into the threaded hole 64 on the connecting section 62. This fixing can be achieved by tightening with a wrench or similar tool. The operation is easy to master and highly efficient. In contrast, electromagnetic fixing is less effective in the event of a sudden power outage, potentially leading to a loss of fixation and posing a safety hazard. Elastic pin fixing may require overcoming significant elastic force during insertion and removal, making it relatively laborious. Inserting and removing the pin at a height (top of the support body 1) is also inconvenient. Furthermore, in this embodiment, when the traction arm 6 lifts the horizontal cantilever arm 2 and the inclined cantilever arm 3, the first rotating shaft 63 connected to the traction arm 6, as the main load-bearing component, requires frequent inspection and replacement.

[0039] Clearly, the traction arm 6 only needs to be axially extendable and lockable, and is not limited to the aforementioned rotating section 61 and connecting section 62. While screw-in structures offer high connection strength, they also have longer operation times. Other options include direct axially movable sleeves with limit holes and limit pins. Correspondingly, the connecting locking mechanism 5 is not limited to the aforementioned connecting frame 51 and the locking part 52 within it. For example, a hook on the traction arm 6 can be directly attached to a crossbar on the connecting locking mechanism 5, or both the traction arm 6 and the connecting locking mechanism 5 can have a slot where a pin can be inserted after aligning the two slots. Obviously, there are many detachable connecting mechanisms and locking axial extension mechanisms in the prior art.

[0040] Preferably, the support body 1 is provided with a placement groove 10 for placing the traction arm 6. The placement groove 10 is vertically arranged on the support body 1 and is located above the horizontal cantilever arm 2. When the insulator 4 does not need to be replaced, the traction arm 6 can be stored in the placement groove 10, which makes it convenient for workers to carry out maintenance on other electrical problems on the support body 1.

[0041] It should be noted that in windy weather, the contact wire arms (in this embodiment, the horizontal arm 2 and the oblique arm 3) will be subjected to wind force, which will increase the stress on the support body 1. In severe cases, the horizontal arm 2 or the oblique arm 3 may even deform or be damaged. Currently, the horizontal arm 2 and the oblique arm 3 are usually designed to be rotatable. By making the horizontal arm 2 and the oblique arm 3 rotatable, the contact wire can be adapted to the swaying caused by strong winds, reducing the impact of wind on the arm structure and improving its wind resistance. When workers replace the insulator 4, the rotatable horizontal arm 2 and the oblique arm 3 increase the difficulty of replacing the insulator 4.

[0042] To address the aforementioned issues, in another embodiment of the present invention, the horizontal wrist arm 2 and the oblique wrist arm 3 are rotatably mounted on the support body 1 via a second rotating shaft 7. The support body 1 is provided with two sets of limiting parts 8, which correspond to the horizontal wrist arm 2 and the oblique wrist arm 3, respectively. A locking cavity 11 is provided on the support body 1, and the locking cavity 11 communicates with the top of the placement groove 10. Each limiting part 8 includes two limiting blocks 81, which are positioned on either side of the horizontal wrist arm 2 or the oblique wrist arm 3. The limiting blocks 81 are rotatably mounted on the support body 1 via a third rotating shaft 82. The third rotating shaft 82 is connected to the support body 1 via a torsion spring (not shown in the diagram). The third rotating shaft 82 divides the limiting blocks 81 into two parts: one part is located on either side of the corresponding horizontal wrist arm 2 or the oblique wrist arm 3, used to limit the rotation angle of the corresponding horizontal wrist arm 2 or the oblique wrist arm 3; the other part extends into the locking cavity. Within the 11, the support body 1 is also equipped with an adjustment mechanism 9. Based on the rotation of the traction arm 6, the adjustment mechanism 9 adjusts two limiting blocks 81 to clamp the corresponding horizontal wrist arm 2 or inclined wrist arm 3, restricting the rotation of the horizontal wrist arm 2 and inclined wrist arm 3. The adjustment mechanism 9 includes a trigger slide rod 91 that is slidably installed in the locking cavity 11 in the vertical direction. A return spring 93 is connected between the trigger slide rod 91 and the support body 1. Two compression wedges 92 are provided on the trigger slide rod 91. The two compression wedges 92 are arranged vertically at intervals. The two compression wedges 92 correspond one-to-one with the two sets of limiting parts 8. The compression wedges 92 are inverted cone shape. Based on the downward movement of the trigger slide rod 91, the inverted cone compression wedges 92 compress the corresponding two limiting blocks 81. Based on the inclined surface of the inverted cone, the two limiting blocks 81 gradually close together and clamp the corresponding horizontal wrist arm 2 or inclined wrist arm 3, thereby fixing the horizontal wrist arm 2 or inclined wrist arm 3.

[0043] Specifically, in this embodiment, the axial direction of the second rotating shaft 7 and the axial direction of the third rotating shaft 82 are parallel to the axial direction of the support body 1. That is, the horizontal wrist arm 2, the oblique wrist arm 3, and the limiting block 81 can swing horizontally on the support body 1. The two limiting blocks 81 are V-shaped and located on both sides of the corresponding horizontal wrist arm 2 or oblique wrist arm 3. When the torsion spring is not under force, the distal ends of the two limiting blocks 81 abut against the surface of the support body 1. At this time, the two limiting blocks 81 are in the maximum opening state. At this time, the included angle formed by the two limiting blocks 81 is the angle at which the horizontal wrist arm 2 and oblique wrist arm 3 on the support body 1 can rotate. When the limiting blocks 81 are squeezed by the squeezing wedge 92, the two limiting blocks 81 rotate inward at the same time to clamp the corresponding horizontal wrist arm 2 or oblique wrist arm 3, thereby fixing the horizontal wrist arm 2 or oblique wrist arm 3.

[0044] When insulator 4 needs to be replaced, the operator rotates the traction arm 6 so that the end of the connecting section 62 away from the rotating section 61 faces the insertion hole 53 on the connecting frame 51. As the traction arm 6 rotates, the end of the traction arm 6 away from the connecting frame 51 presses against the trigger slide 91. Under the pressure of the traction arm 6, the trigger slide 91 moves downward along the locking cavity 11. As the trigger slide 91 moves downward, the return spring 93 contracts, accumulating elastic potential energy. The inverted cones of the two pressing wedges 92 on the trigger slide 91 press against the portions of the corresponding two limiting blocks 81 located within the locking cavity 11. Under the pressure of the corresponding compression wedge 92, section 81 rotates inward (i.e., towards the corresponding horizontal arm 2 or inclined arm 3). The two limiting blocks 81 rotate to clamp the corresponding horizontal arm 2 or inclined arm 3, preventing rotation of the horizontal arm 2 or inclined arm 3 during insulator 4 replacement. Afterward, the operator continues to tighten the connecting section 62. Because the connecting section 62 and the rotating section 61 are connected by a threaded connection, as the connecting section 62 rotates, the connecting section 62 and the rotating section 61 gradually separate (equivalent to the length of the traction arm 6 gradually increasing). The connecting section 62 gradually inserts into the insertion hole 53 on the connecting frame 51. As the connecting section 62 continues to be turned, the locking bolt located in the connecting frame 51 is gradually inserted into the threaded hole 64 at the end of the rotating section 61, forming a threaded connection. At this time, the locking bolt in the connecting frame 51 and the threaded hole 64 at the end of the connecting section 62 are threadedly fixedly connected, and the connecting section 62 and the rotating section 61 are threadedly fixedly connected. At this time, the traction arm 6 and the connecting frame 51 have been locked, so that the traction arm 6 can no longer rotate. Because the traction arm 6 cannot rotate, the trigger slide 91, which is squeezed by the traction arm 6, cannot be reset under the action of the return spring 93. At this time, both the horizontal wrist arm 2 and the oblique wrist arm 3 are in a locked state. This facilitates the replacement of insulator 4 by the staff. After the replacement of insulator 4 is completed, the staff turns the connecting section 62 in the direction of the connection. The connecting section 62 separates from the locking bolt in the connecting frame 51, and the connecting section 62 gradually leaves the connecting frame 51. When the connecting section 62 completely leaves the connecting frame 51, under the action of the return spring 93, the trigger slide rod 91 moves upward with the compression wedge 92. The compression wedge 92 leaves the limiting block 81, and the limiting block 81 loses the compression of the compression wedge 92. Under the action of the torsion spring, the limiting block 81 returns to its initial state. At this time, the horizontal cantilever arm 2 and the inclined cantilever arm 3 can rotate on the support body 1 again.

[0045] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A contact wire support post, comprising a post body, wherein a horizontal cantilever arm and a diagonal cantilever arm are mounted on the post body, and an insulator is bolted to both the horizontal cantilever arm and the diagonal cantilever arm, characterized in that, A connection locking mechanism is provided at the intersection of the horizontal wrist arm and the oblique wrist arm. A traction arm is rotatably mounted on the main support body. When the end of the traction arm is inserted into the connection locking mechanism, the connection locking mechanism can lock the traction arm. Both the horizontal wrist arm and the oblique wrist arm are obliquely pulled on the main support body by the traction arm. The support body has a slot for placing the traction arm. The horizontal and oblique arms are rotatably mounted on the support body via a second rotating shaft, the axis of which is parallel to the axis of the support body. The support body has two sets of limiting parts, corresponding to the horizontal and oblique arms respectively. The support body also has a locking cavity connected to the top of the slot. Each limiting part includes two limiting blocks, which are rotatably mounted on the support body via a third rotating shaft. The third rotating shaft is connected to the support body via a torsion spring, dividing the limiting blocks into two parts. One part is located on both sides of the corresponding horizontal or oblique arm to limit the rotation angle of the corresponding horizontal or oblique arm, and the other part extends into the locking cavity. The limiting blocks are rotatably mounted on the support body. The support body also has an adjustment mechanism. Based on the rotation of the traction arm, the adjustment mechanism adjusts the two limiting blocks to clamp the corresponding horizontal or oblique arm, limiting its rotation.

2. The contact wire support post according to claim 1, characterized in that, The traction arm includes a separable rotating section and a connecting section. The rotating section is rotatably connected to the support body via a first rotating shaft. The side wall of the rotating section away from the support body is provided with threads. The connecting section is sleeved on the outside of the rotating section, and the connecting section and the rotating section are threadedly connected.

3. The contact wire support post according to claim 2, characterized in that, The connection locking mechanism includes a connecting frame and a locking part disposed therein. The horizontal wrist arm and the inclined wrist arm both pass through the connecting frame. The connecting frame has an insertion hole for inserting the traction arm. When the connecting segment is inserted into the insertion hole, the locking part locks the connecting segment by turning the connecting segment.

4. The contact wire support post according to claim 3, characterized in that, The locking part includes a locking bolt, which is coaxially arranged with the insertion hole. The end of the connecting section away from the rotating section is provided with a threaded hole that matches the locking bolt. When the connecting section rotates, the locking bolt is screwed into the threaded hole to fix the connecting section.

5. The contact wire support post according to claim 1, characterized in that, The adjustment mechanism includes a trigger slide rod that is slidably installed in the locking cavity in the vertical direction. A return spring is connected between the trigger slide rod and the main body of the support column. Two compression wedges are provided on the trigger slide rod. The two compression wedges are arranged vertically at intervals. The two compression wedges correspond one-to-one with the two sets of limiting parts.

6. The contact wire support post according to claim 5, characterized in that, The compression wedge is in the shape of an inverted cone. Based on the downward movement of the trigger slide, the inverted cone-shaped compression wedge compresses the two corresponding limiting blocks. Based on the inclined surface of the inverted cone of the compression wedge, the two limiting blocks gradually close together and clamp the corresponding horizontal or inclined wrist arm.

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