Safety device for crossing overhead line

Abstract

The invention discloses a safety device for crossing an overhead line, and relates to the technical field of overhead lines. The base plate is fixedly mounted at the top of the supporting assembly; the bottoms of the two parallel connecting rod mechanisms are fixedly arranged on the base plate; the reverse maintaining assembly is used for enabling the two parallel connecting rod mechanisms to keep opposite swinging directions in the swinging process; the stringing assembly comprises a plurality of stringing units which are sequentially connected in a sliding mode, and the two stringing units located at the head and the tail are fixedly connected with the tops of the two parallel connecting rod mechanisms in a one-to-one correspondence mode; the two blocking assemblies each comprise a blocking rod, and the two blocking rods are arranged at the open ends of the two stringing units located at the head and the tail respectively. According to the invention, by driving one of the parallel connecting rod mechanisms to swing, the two parallel connecting rod mechanisms can synchronously and reversely swing together under the constraint of the reverse maintaining assembly, so that the stringing units of the stringing assembly can slide mutually to be unfolded into a stringing state or can be stored together.

Description

Technical Field

[0001] The invention relates to the technical field of overhead lines, in particular to a safety device for crossing overhead lines. Background Art

[0002] In power construction, overhead lines sometimes need to cross obstacles, such as roads, railways, buildings and other overhead lines. The current mainstream construction method is to build crossing frames on both sides of the obstacles. The project volume is relatively large, so some more portable single-unit crossing frames have also appeared.

[0003] Patent publication number CN214479089U discloses a portable insulated spanning frame, comprising two short clevis tubes, an upper transverse tube, a lower transverse tube, two right-angle hangers, and a traction member. One end of the upper transverse tube is detachably connected to one end of a right-angle hanger; the other end of the upper transverse tube is detachably connected to one end of another right-angle hanger; one end of the lower transverse tube is detachably connected to the other end of one right-angle hanger; and the other end of the lower transverse tube is detachably connected to the other end of another right-angle hanger. The upper transverse tube, two right-angle hangers, and lower transverse tube form a rectangular support member. The upper left and upper right corners of the rectangular support member are detachably connected to the short clevis tubes, respectively. One end of the traction member is detachably connected to the middle portion of the lower transverse tube. The spanning frame can be disassembled into individual components, packed into a box, and then assembled on-site. The entire assembly process takes no more than three minutes, significantly improving work efficiency.

[0004] In the prior art such as the above-mentioned patent, the various components of the crossing frame can only achieve portability through on-site installation and disassembly, but the operation is relatively cumbersome, the installation and disassembly process is relatively time-consuming, and the area where the crossing frame can be wired is small and relatively limited. Summary of the Invention

[0005] The object of the present invention is to provide a safety device for crossing overhead lines to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a safety device for crossing overhead lines, comprising: a support assembly; a base plate, which is fixedly mounted on the top of the support assembly; two parallel linkage mechanisms, whose bottoms are fixedly arranged on the base plate; a reverse maintaining assembly, which is used to keep the two parallel linkage mechanisms in opposite swinging directions during the swinging process; a line stringing assembly, which includes a plurality of line stringing units that are slidably connected in sequence, and the two line stringing units located at the head and tail are fixedly connected to the tops of the two parallel linkage mechanisms in a one-to-one correspondence; two blocking assemblies, each of which includes a blocking rod, and the two blocking rods are respectively arranged on the open ends of the two line stringing units located at the head and tail.

[0007] Furthermore, the stringing unit includes a transverse rod, and a stringing roller is rotatably connected to the transverse rod.

[0008] Furthermore, the transverse rods of two adjacent stringing units are slidably connected along the length direction via a sliding structure.

[0009] Furthermore, each of the parallel linkage mechanisms is composed of a horizontal first link, a horizontal second link, and a parallel third link and fourth link to form a parallelogram structure; the first links of the two parallel linkage mechanisms are fixedly connected to the base plate, and the second links of the two parallel linkage mechanisms are fixedly connected one-to-one with the transverse rods of the two wire-racking units located at the head and tail.

[0010] Furthermore, the reverse maintaining assembly includes a guide rail, a sliding block and two equal-length balance bars, the guide rail is vertically fixedly connected to the base plate and is located in the middle of the two parallel linkage mechanisms, the sliding block is slidingly connected to the guide rail, one end of the two balance bars is coaxially connected to the sliding block, and the other end of the two balance bars is rotationally connected to the third link of the two parallel linkage mechanisms or the fourth link of the two parallel linkage mechanisms in a one-to-one correspondence.

[0011] Furthermore, the blocking assembly also includes a connecting rod, a limit block, a first rack, a torsion spring, a coaxial gear and a reversing gear. The connecting rod is fixedly connected to the transverse rod of the corresponding line-string unit, the blocking rod is rotatably connected to the connecting rod, the limit block is fixedly connected to the connecting rod, and the process of the torsion spring restoring the deformation can enable the blocking rod to rotate to a vertical state protruding upward from the line-string roller. The coaxial gear is fixedly connected relative to the blocking rod and is coaxial with the rotating shaft between the blocking rod and the connecting rod. The reversing gear is rotatably connected to the connecting rod, and the reversing gear is engaged with the coaxial gear. The first rack is fixedly connected to the transverse rod of the adjacent line-string unit, and the first rack can engage with the reversing gear.

[0012] Furthermore, it also includes a driving component, which is used to drive any one of the third link and the fourth link of any parallel linkage mechanism to swing relative to the base plate.

[0013] Furthermore, the drive assembly includes a hydraulic cylinder, a second rack and a transmission gear. The transmission gear is relatively fixedly connected to the third link or the fourth link of any parallel linkage mechanism, and the transmission gear is coaxial with the rotating shaft between the third link or the fourth link and the corresponding first link. The second rack is horizontally slidably connected to the base plate, and the second rack of the transmission gear is meshed with the transmission gear. The hydraulic cylinder is laterally fixedly installed on the base plate, and the hydraulic cylinder of the hydraulic cylinder is fixedly connected to the second rack.

[0014] Furthermore, two support blocks are provided on the base plate. When the stringing assembly is extended to string the wires, the two support blocks each support a parallel link mechanism.

[0015] Furthermore, the support assembly includes a support rod and a support tower, the top of the support rod is fixedly connected to the base plate, and the bottom is fixedly connected to the support tower.

[0016] In the above technical solution, the present invention provides a safety device for crossing overhead lines. By driving one of the parallel link mechanisms to swing, the two parallel link mechanisms can be synchronously swung in the opposite direction under the constraint of the reverse maintaining component, so that the various stringing units of the stringing component can slide against each other and be expanded into a stringing state or stored together, so that there is a larger stringing area when expanded, and it is very portable when stored. When the stringing component is expanded to string the line, the two blocking components can automatically expand the blocking rod to be higher than the stringing unit, and play a blocking and limiting role on the wires on the stringing unit to prevent the wires from slipping off the stringing unit. When the stringing is completed and the stringing component is stored, the two blocking components can automatically follow the storage of the stringing component and be stored together, thereby making the present invention more portable as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction to the drawings required for use in the embodiments will be given below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A front view of the structure when unfolded provided by an embodiment of the present invention;

[0019] Figure 2 A rear view of the structure when unfolded provided by an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the structure of an embodiment of the present invention when deployed;

[0021] Figure 4 A schematic diagram of the connection structure between the blocking assembly and the wiring assembly provided in an embodiment of the present invention;

[0022] Figure 5 A front view of the structure when stored provided by an embodiment of the present invention;

[0023] Figure 6 A rear view of the structure when stored provided by an embodiment of the present invention;

[0024] Figure 7 A schematic diagram of the structure of the embodiment of the present invention when stored;

[0025] Figure 8 A schematic structural diagram of two parallel linkage mechanisms provided by an embodiment of the present invention when they are vertically parallel;

[0026] Figure 9 A schematic diagram of the state of two parallel linkage mechanisms provided by an embodiment of the present invention when a reverse maintaining component is not provided;

[0027] Figure 10 This is a schematic diagram of the state of two parallel linkage mechanisms when a reverse maintaining component is provided in an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1. Support assembly; 1.1. Support rod; 1.2. Support tower; 2. Base plate; 3. Parallel linkage; 3.1. First link; 3.2. Second link; 3.3. Third link; 3.4. Fourth link; 4. Stringing assembly; 4.1. Stringing unit; 4.11. Horizontal rod; 4.12. Stringing roller; 5. Blocking assembly; 5.1. Blocking rod; 5.2. Connecting rod; 5.3. Limit block; 5.4. First rack; 5.5. Coaxial gear; 5.6. Reversing gear; 6. Reverse maintaining assembly; 6.1. Guide rail; 6.2. Sliding block; 6.3. Balance bar; 7. Support block; 8. Drive assembly; 8.1. Hydraulic cylinder; 8.2. Second rack; 8.3. Transmission gear. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1-10 An embodiment of the present invention provides a safety device for crossing an overhead line, comprising a support assembly 1, a base plate 2, two parallel linkage mechanisms 3, a reverse maintaining assembly 6, a line stringing assembly 4, and two blocking assemblies 5, wherein the base plate 2 is fixedly mounted on the top of the support assembly 1; the bottoms of the two parallel linkage mechanisms 3 are both fixedly mounted on the base plate 2, and the two parallel linkage mechanisms 3 have the same structure and are mounted side by side on the base plate 2; the reverse maintaining assembly 6 is used to keep the two parallel linkage mechanisms 3 in opposite swinging directions during the swinging process, thereby preventing the two parallel linkage mechanisms 3 from swinging in the same direction and tilting in parallel during the swinging process. The line stringing assembly 4 includes Multiple stringing units 4.1 are slidably connected in sequence, and the structures of each stringing unit 4.1 are consistent. The two stringing units 4.1 located at the head and tail are fixedly connected to the top of the two parallel linkage mechanisms in a one-to-one correspondence; the two blocking assemblies 5 each include a blocking rod 5.1, and the two blocking rods 5.1 are respectively arranged on the open ends of the two stringing units 4.1 located at the head and tail, that is, one blocking rod 5.1 is located on the open end of one of the two outermost stringing units 4.1, and the other blocking rod 5.1 is located on the open end of the other of the two outermost stringing units 4.1. The blocking assembly 5 can block and limit the two ends of the stringing assembly 4 when the stringing assembly 4 is unfolded to string the wires.

[0032] In the above technical solution, the present invention provides a safety device for crossing overhead lines. By driving one of the parallel linkage mechanisms 3 to swing, the two parallel linkage mechanisms 3 can be synchronously swung in the opposite direction under the constraint of the reverse maintaining component 6, so that the various stringing units 4.1 of the stringing component 4 can slide against each other and be expanded into a stringing state or stored together, so that there is a larger stringing area when expanded, and it is very portable when stored. When the stringing component 4 is expanded to string the line, the two blocking components 5 can automatically allow the blocking rod 5.1 to be expanded to be higher than the stringing unit 4.1, and play a blocking and limiting role on the wires on the stringing unit 4.1, preventing the wires from slipping off the stringing unit 4.1. When the stringing is completed and the stringing component 4 is stored, the two blocking components 5 can automatically follow the storage of the stringing component 4 and be stored together, thereby making the present invention more portable as a whole.

[0033] As a preferred embodiment of the present invention, the stringing unit 4.1 includes a transverse rod 4.11, to which a stringing roller 4.12 is rotatably connected. The stringing roller 4.12 can reduce wear and resistance between the stringing roller and the conductor during installation. The transverse rods 4.11 of two adjacent stringing units 4.1 are slidably connected along the length direction by a sliding structure, which can be a slider and chute or a roller and guide rail 6.1. Furthermore, the number of stringing units 4.1 is at least two, and preferably 3-6.

[0034] As a preferred embodiment of the present invention, each parallel linkage mechanism 3 is formed into a parallelogram structure by a first link 3.1, a second link 3.2, a third link 3.3, and a fourth link 3.4. The first link 3.1 and the second link 3.2 are arranged horizontally and of equal length, and the third link 3.3 and the fourth link 3.4 are arranged parallel and of equal length. The first link 3.1 of each parallel linkage mechanism 3 is fixedly connected to the base plate 2, and the second link 3.2 of each parallel linkage mechanism 3 is fixedly connected to the transverse rod 4.11 of the two wire stringing units 4.1 at the front and rear. This arrangement ensures that the first link 3.1 of each parallel linkage mechanism 3 is of the same height, and the second link 3.2 of each parallel linkage mechanism 3 is of the same height. In addition, the wire stringing units 4.1 of the wire stringing assembly 4 can slide relative to each other, so that by rotating only the third link 3.3 or the fourth link 3.4 of one of the parallel linkage mechanisms 3, the two linkage mechanisms can swing synchronously, thereby driving the wire stringing assembly 4 to expand or retract.

[0035] As a preferred solution of the present invention, the reverse maintaining assembly 6 includes a guide rail 6.1, a sliding block 6.2 and two equal-length balance bars 6.3. The guide rail 6.1 is vertically fixedly connected to the base plate 2 and is located in the middle of the two parallel linkage mechanisms 3. The sliding block 6.2 is slidingly connected to the guide rail 6.1. One end of the two balance bars 6.3 is coaxially connected to the sliding block 6.2. The other end of the two balance bars 6.3 is rotationally connected to the third link 3.3 of the two parallel linkage mechanisms 3 or the fourth link 3.4 of the two parallel linkage mechanisms 3 in a one-to-one correspondence. The two balance bars 6.3 are equal in length, and the rotational connection position distances between the two balance bars 6.3 and the corresponding third link 3.3 or fourth link 3.4 are also corresponding, that is, the two position distances are equal to the distance between the corresponding first link 3.1.

[0036] In this technical solution, the reverse maintaining component 6 is used to keep the two parallel link mechanisms 3 in opposite swing directions during the swing process, preventing the two parallel link mechanisms 3 from swinging in the same direction and tilting in parallel during the swing process. This is because the two parallel link mechanisms 3 will experience rotation to the same direction during the deployment or storage of the wire string assembly 4. Figure 8 In the state shown, the third link 3.3 and the fourth link 3.4 of the two parallel linkages 3 are both in a vertical state. If the reverse maintaining component 6 is not provided, no matter which direction one of the parallel linkages 3 swings, there is a probability that the other linkage will swing in the same direction in a state of always keeping parallel with it. Figure 9 As shown, the stringing assembly 4 cannot be fully unfolded or fully retracted, so that the present invention cannot be used normally. For this reason, a reverse maintaining assembly 6 is provided, and the two parallel link mechanisms 3 are subjected to Figure 8 In the state of , when one of the parallel linkages 3 swings in any direction, since the two balancing rods 6.3 are equal in length and the rotation axis between the two balancing rods 6.3 is always kept on the vertical line where the midpoint between the two parallel linkages 3 is located, the two parallel linkages 3 (the third link 3.3 or the fourth link 3.4) cannot be parallel in a non-vertical state, so the two parallel linkages can always swing in opposite directions, avoiding the "clockwise turning" phenomenon.

[0037] As a preferred technical solution of the present invention, the blocking assembly 5 also includes a connecting rod 5.2, a limit block 5.3, a first rack 5.4, a torsion spring, a coaxial gear 5.5 and a reversing gear 5.6. The connecting rod 5.2 is fixedly connected to the horizontal rod 4.11 of the corresponding stringing unit 4.1. The blocking rod 5.1 is rotatably connected to the connecting rod 5.2. The limit block 5.3 is fixedly connected to the connecting rod 5.2. The torsion spring (not shown in the figure) restores its deformation to enable the blocking rod 5.1 to rotate until it protrudes upward from the stringing roller 4.12 until it is stopped by the limit block 5.3. The coaxial gear 5.5 is 5 is fixedly connected relative to the blocking rod 5.1 and is coaxial with the rotating shaft between the blocking rod 5.1 and the connecting rod 5.2. For example, the rotating shaft between the blocking rod 5.1 and the connecting rod 5.2 is fixed relative to the blocking rod 5.1 and is rotatably connected relative to the connecting rod 5.2. The coaxial gear 5.5 is coaxially fixedly connected to the rotating shaft, and the reversing gear 5.6 is rotatably connected to the connecting rod 5.2. The reversing gear 5.6 meshes with the coaxial gear 5.5. The first rack 5.4 is fixedly connected to the transverse rod 4.11 of the adjacent stringing unit 4.1 and can mesh with the reversing gear 5.6.

[0038] In the present technical solution, during the unfolding process of the stringing assembly 4, the outermost stringing unit 4.1 slides relative to the adjacent stringing unit 4.1 and stretches, so that the first rack 5.4 drives the reversing gear 5.6 to rotate forward, and the reversing gear 5.6 drives the coaxial gear 5.5 to reverse, and the coaxial gear 5.5 drives the blocking rod 5.1 to reverse together until the blocking rod 5.1 protrudes upward from the stringing roller 4.12. It is more preferred that the blocking rod 5.1 rotates to be blocked by the limit block 5.3 and is just vertically upward. At this time, the blocking rod 5.1 is in a blocking state, and the first gear just begins to disengage from the reversing gear. The elastic force of the torsion spring of the gear 5.6 keeps the blocking rod 5.1 in the blocking state against the limit block 5.3, preventing the blocking rod 5.1 from accidentally leaving the blocking state during the subsequent installation of the wires; during the storage process of the wire stringing assembly 4, the outermost wire stringing unit 4.1 and the adjacent wire stringing unit 4.1 slide relative to each other and shorten, so that the first rack 5.4 drives the reversing gear 5.6 to reverse, and the reversing gear 5.6 drives the coaxial gear 5.5 and the blocking rod 5.1 to rotate forward, so that the blocking rod 5.1 rotates forward and leaves the blocking state, and the blocking rod 5.1 and the wire stringing unit 4.1 are stored and overlapped together. It should be noted that the so-called forward and reverse rotation only refer to opposite directions of rotation, and do not represent clockwise directions. This technical solution realizes that when the wire stringing assembly 4 is unfolded, the blocking rod 5.1 is also automatically and synchronously unfolded to the blocking state, and when the wire stringing assembly 4 is stored, the blocking rod 5.1 is also automatically and synchronously stored.

[0039] As a preferred technical solution of the present invention, a driving assembly 8 is further included, which is used to drive either the third link 3.3 or the fourth link 3.4 of any parallel linkage 3 to swing relative to the base plate 2. Preferably, the driving assembly 8 includes a reduction motor (not shown in the figure), which is mounted on the base plate 2 and is used to drive either the third link 3.3 or the fourth link 3.4 to rotate relative to the plate. Another preferred embodiment is that the drive assembly 8 includes a hydraulic cylinder 8.1, a second rack 8.2 and a transmission gear 8.3. The transmission gear 8.3 is relatively fixedly connected to the third link 3.3 or the fourth link 3.4 of any parallel linkage mechanism 3, and the transmission gear 8.3 is coaxial with the rotating shaft between the third link 3.3 or the fourth link 3.4 and the corresponding first link 3.1. The second rack 8.2 is horizontally slidably connected to the base plate 2, the transmission gear 8.3 and the second rack 8.2 are engaged with the transmission gear 8.3, the hydraulic cylinder 8.1 is laterally fixedly installed on the base plate 2, the hydraulic cylinder 8.1 of the hydraulic cylinder 8.1 is fixedly connected to the second rack 8.2, the hydraulic cylinder 8.1 drives the second rack 8.2 to slide, and the second rack 8.2 drives the transmission gear 8.3 to rotate, thereby realizing the swing of the parallel linkage mechanism 3.

[0040] As a preferred technical solution of the present invention, two support blocks 7 are provided on the base plate 2. When the stringing assembly 4 is extended to perform stringing, the two support blocks 7 each support a parallel linkage mechanism 3. The purpose of providing the support blocks 7 is to ensure that when the stringing assembly 4 is extended to perform stringing, the weight of the conductor can be released to the support blocks 7 through the linkage assembly, rather than relying entirely on the self-locking ability of the drive assembly 8.

[0041] As a preferred technical solution of the present invention, the support assembly 1 includes a support rod 1.1 and a support tower 1.2. The top of the support rod 1.1 is fixedly connected to the base plate 2, and the bottom is fixedly connected to the support tower 1.2. The support tower 1.2 is directly erected on the ground or on a scissors-type lifting platform vehicle.

[0042] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A safety device for crossing an overhead line, characterized in that: include: Support components; a base plate fixedly mounted on the top of the support assembly; Two parallel linkage mechanisms, the bottoms of which are both fixedly arranged on the base plate; A reverse maintaining assembly, which is used to keep the two parallel link mechanisms in opposite swinging directions during the swinging process; The stringing assembly includes a plurality of stringing units that are slidably connected in sequence, and the two stringing units at the head and tail are fixedly connected to the tops of the two parallel linkage mechanisms in a one-to-one correspondence; The two blocking assemblies each include a blocking rod, and the two blocking rods are respectively arranged on the open ends of the two wire stringing units located at the head and the tail.

2. A safety device for crossing an overhead line according to claim 1, characterized in that: The wire-string unit comprises a transverse rod, and a wire-string roller is rotatably connected to the transverse rod.

3. A safety device for crossing an overhead line according to claim 2, characterized in that: The transverse rods of two adjacent stringing units are slidably connected along the length direction through a sliding structure.

4. A safety device for crossing an overhead line according to claim 2, characterized in that: Each of the parallel linkage mechanisms is composed of a horizontal first linkage, a horizontal second linkage, and parallel third and fourth linkages to form a parallelogram structure; the first linkages of the two parallel linkage mechanisms are fixedly connected to the base plate, and the second linkages of the two parallel linkage mechanisms are fixedly connected one-to-one with the transverse rods of the two wire-racking units located at the head and tail.

5. A safety device for crossing an overhead line according to claim 4, characterized in that: The reverse maintaining assembly includes a guide rail, a sliding block and two equal-length balance rods. The guide rail is vertically fixedly connected to the base plate and is located in the middle of the two parallel linkage mechanisms. The sliding block is slidably connected to the guide rail. One end of the two balance rods is coaxially connected to the sliding block, and the other end of the two balance rods is rotationally connected to the third link of the two parallel linkage mechanisms or the fourth link of the two parallel linkage mechanisms in a one-to-one correspondence.

6. A safety device for crossing an overhead line according to claim 2, characterized in that: The blocking assembly also includes a connecting rod, a limit block, a first rack, a torsion spring, a coaxial gear and a reversing gear. The connecting rod is fixedly connected to the transverse rod of the corresponding line-string unit, the blocking rod is rotatably connected to the connecting rod, the limit block is fixedly connected to the connecting rod, and the process of the torsion spring restoring the deformation can enable the blocking rod to rotate to a vertical state protruding upward from the line-string roller. The coaxial gear is fixedly connected relative to the blocking rod and is coaxial with the rotating shaft between the blocking rod and the connecting rod. The reversing gear is rotatably connected to the connecting rod, and the reversing gear is engaged with the coaxial gear. The first rack is fixedly connected to the transverse rod of the adjacent line-string unit, and the first rack can engage with the reversing gear.

7. A safety device for crossing an overhead line according to claim 4, characterized in that: The device further comprises a driving assembly for driving any one of the third link and the fourth link of any parallel linkage mechanism to swing relative to the base plate.

8. A safety device for crossing an overhead line according to claim 7, characterized in that: The driving assembly includes a hydraulic cylinder, a second rack and a transmission gear. The transmission gear is relatively fixedly connected to the third link or the fourth link of any parallel linkage mechanism, and the transmission gear is coaxial with the rotating shaft between the third link or the fourth link and the corresponding first link. The second rack is horizontally slidably connected to the base plate, and the second rack of the transmission gear is meshed with the transmission gear. The hydraulic cylinder is laterally fixedly installed on the base plate, and the hydraulic cylinder of the hydraulic cylinder is fixedly connected to the second rack.

9. A safety device for crossing an overhead line according to claim 1, characterized in that: Two supporting blocks are arranged on the base plate. When the stringing assembly is extended to string the wires, the two supporting blocks respectively support a parallel link mechanism.

10. A safety device for crossing an overhead line according to claim 1, characterized in that: The support assembly includes a support rod and a support tower. The top of the support rod is fixedly connected to the base plate, and the bottom is fixedly connected to the support tower.

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