Uninterruptible-power simple insulating crossing frame for stringing

By designing a simple insulating span frame, the traction control of movable splicing assembly and detachable splicing frame mechanism, stable seat mechanism and insulating network are solved, and efficient and safe wire-mounting construction is achieved.

CN119627726APending Publication Date: 2025-03-14STATE GRID ANHUI ELECTRIC POWER CO LTD MENGCHENG COUNTY POWER SUPPLY CO +1
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Patent Information

Application Number
CN202311660239.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-11-30
Publication Date
2025-03-14

AI Technical Summary

Technical Problem

The existing insulation span frame is cumbersome and has a high working intensity, which extends the wire installation period and reduces the work efficiency of line layout.

Method used

A simple insulating spanning frame including a frame mechanism, a seat mechanism and an insulating network is designed. The frame mechanism is assembled through movable splicing. The seat mechanism adopts detachable splicing. The insulating network is tightened and controlled through the traction assembly and the delimiting assembly to ensure the safe distance of the wire.

Benefits of technology

The frame erecting process is simplified, the installation efficiency and stability are improved, the construction cycle is reduced, and the safety of line erecting work is enhanced.

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Abstract

The invention discloses an uninterruptible-power simple insulation crossing frame for stringing, and relates to the technical field of insulation crossing frames, and the technical scheme is characterized in that the uninterruptible-power simple insulation crossing frame comprises a seat body mechanism used for forming a basic support; the frame body mechanism is arranged on the seat body mechanism and is used for forming a main body support; and the insulating net is arranged on the frame body mechanism and is used for supporting and erecting the wire. According to the technical scheme, an existing spanning frame erecting structure is improved, the structure of the spanning frame erecting structure is simplified, erecting of the frame body is more convenient and efficient while high stability is kept, the construction period is shortened, and the working efficiency is improved.
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Description

Technical Field

[0001] The invention relates to the technical field of insulating spanning frames, and in particular to a simple insulating spanning frame for wiring without power outage. Background Art

[0002] An insulated crossing frame is a frame installed under the wire during the installation process to ensure a safe distance between the wire and the object being crossed at the lower end. During the crossing operation, in order to avoid power outages affecting the city's electricity consumption, the power supply to the wire at the lower end is often not cut off. Therefore, it is necessary to use an insulated crossing frame to lift the wire at the upper end to maintain it at the specified safety distance, thereby ensuring the safety of the wire at the lower end.

[0003] At present, the insulating spanning frame generally uses scaffolding to first build the conventional frame, and then installs insulating rods on the frame, and then installs insulating nets on the insulating rods to form a protective measure. However, this frame erection method is relatively cumbersome, the work intensity is high, and it will also extend the installation period of the wires, thereby making the line laying work efficiency relatively low.

[0004] Therefore, based on this, a design or technical improvement is proposed to solve the above-mentioned problem.

[0005] The above contents are only used to assist in understanding the technical solution of the present invention, and do not constitute an admission that the above contents are the closest prior art. Summary of the invention

[0006] The purpose of the present invention is to solve the above-mentioned shortcomings and provide a simple insulating spanning frame for wiring without power outage.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A simple insulating spanning frame for wiring without power outage, comprising

[0009] The frame mechanism is in four groups and arranged in pairs on both sides of the crossed wire to form a main body support;

[0010] The seat mechanisms are respectively arranged at the bottom ends of the four sets of frame mechanisms to form a basic support;

[0011] The insulating net is respectively arranged at four corners on four sets of frame mechanisms to support the installation of conductors.

[0012] Furthermore, the seat body mechanism includes a support base and a side foot assembly arranged on the support base for stabilizing the support base, and the side foot assembly includes a transverse telescopic support rod arranged on the support base and a longitudinal telescopic support rod arranged on the transverse telescopic support rod;

[0013] The support base is also provided with universal wheels and a traction hook.

[0014] Furthermore, the frame structure includes scaffolding poles, a working platform and tie rods, and the three are movably spliced ​​and assembled, the scaffolding poles and the supporting base are detachably spliced, and the scaffolding poles and tie rods include steel pipes and insulating pipes.

[0015] Furthermore, the frame mechanism is also provided with a protection mechanism for limiting the maximum sag of the installed conductor, and the protection mechanism includes a traction component arranged on the frame mechanism for tightening the insulating net and a limiting component arranged on the traction component.

[0016] Furthermore, the traction assembly includes a fixing frame arranged at the top of the frame body for fixing the insulating net, a traction frame detachably connected to the scaffolding pole, and a reversing frame arranged on the fixing frame.

[0017] Furthermore, the fixing frame includes a top fixing frame movably sleeved with the scaffolding rod, a transverse sliding track arranged on the top fixing frame, and a tightening hook block sliding within the transverse sliding track.

[0018] Furthermore, the traction frame includes a counterweight frame and a limit frame;

[0019] The counterweight frame includes a longitudinal sliding track, a counterweight block that slides within the longitudinal sliding track, and a mounting foot that is arranged on the longitudinal sliding track and is detachably connected to the sliding track frame;

[0020] The limiting frame comprises a sliding rail frame arranged on the top fixing frame and a latch assembly which limits and slides in the sliding rail frame.

[0021] Furthermore, the reversing frame includes a reversing wheel arranged on the top fixing frame and a traction rope which is sleeved on the reversing wheel and has one end connected to the pulling hook block and the other end connected to the counterweight block.

[0022] Furthermore, a limit slide groove is provided on the longitudinal sliding track, and a buffer spring is provided with one end fixed on the longitudinal sliding track and the other end fixed on the counterweight block, and side abutment plates are provided on both sides of the counterweight block for limited sliding in the limit slide groove;

[0023] The latch assembly includes a latch plate frame that slides within a limited position in a sliding rail frame, a latch block that slides within a sliding cavity groove opened on both sides of the latch plate frame, and a first return spring with one end arranged on the latch block and the other end arranged on the inner wall of the sliding cavity groove.

[0024] Further, the limiting assembly includes a trigger assembly arranged on the bayonet assembly and an adjustment assembly arranged on the trigger assembly;

[0025] The trigger assembly includes a second return spring with one end arranged on the locking plate frame and the other end arranged on the sliding rail frame, a connecting rope arranged on the locking plate frame, and a standard rope arranged on the connecting rope;

[0026] The adjustment components are in two groups, respectively arranged at the two ends of the standard rope, including a limit slide rail arranged at one end of the connecting rope away from the fixing plate frame, a limit slider sliding in the limit slide rail and connected to the end of the standard rope, and an adjustment head arranged on the limit slider;

[0027] The adjusting head comprises a fixed block arranged on the limiting slide rail, a threaded rod arranged on the limiting slide block and movably connected with the fixed block, and an adjusting nut sleeved on the threaded rod and located on the upper side of the fixed block.

[0028] Compared with the prior art, the beneficial effects of this solution are: the solution improves the current spanning frame erection structure to simplify its structure, thereby making the erection of the frame more convenient and efficient while maintaining high stability, thereby reducing the construction period and improving work efficiency.

[0029] By arranging a structure capable of controlling the sag of the installed wires on the crossing frame designed in this scheme, it is avoided that during the installation of the wires, the sag is too large due to the influence of gravity or external environmental factors, resulting in insufficient safety distance between the wires and the crossed wires, thereby enhancing the safety of the wiring work. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 This is a schematic diagram of the overall erection state of the present invention;

[0032] Figure 2 It is a three-dimensional schematic diagram of the overall erection state of the present invention;

[0033] Figure 3 It is a partial three-dimensional schematic diagram of the overall erection state of the present invention;

[0034] Figure 4 It is a three-dimensional schematic diagram of the erection state of a part of the structure of the present invention;

[0035] Figure 5 It is a three-dimensional schematic diagram of the seat body mechanism in the present invention;

[0036] Figure 6 It is a three-dimensional schematic diagram of the frame mechanism of the present invention;

[0037] Figure 7 is a three-dimensional schematic diagram of the traction assembly in the present invention;

[0038] Figure 8 is a three-dimensional schematic diagram of the fixing frame in the present invention;

[0039] Fig. 9 It is a three-dimensional schematic diagram of the traction frame in the present invention;

[0040] Fig.10 It is a three-dimensional schematic diagram of the limiting frame in the present invention;

[0041] Fig.11 It is a three-dimensional schematic diagram of the limiting frame in the present invention;

[0042] Fig.12 It is a three-dimensional schematic diagram of the bayonet assembly in the present invention;

[0043] Fig.13 It is a partial three-dimensional schematic diagram of the components defined in the present invention;

[0044] Fig.14 It is a three-dimensional schematic diagram of the adjustment component in the present invention.

[0045] In the figure: 1. erecting wire; 11. crossed wire; 2. supporting base; 21. insulating net; 22. horizontal telescopic support rod; 23. longitudinal telescopic support rod; 24. universal wheel; 25. traction hook; 26. scaffolding rod; 27. working platform; 28. tie rod; 3. top fixed frame; 31. horizontal sliding track; 32. pulling hook block; 33. longitudinal sliding track; 34. counterweight block; 35. mounting foot; 36. sliding rail frame; 37. reversing wheel; 38. traction rope; 4. limiting slide groove; 41. buffer spring; 42. side abutment plate; 43. locking plate frame; 44. sliding cavity groove; 45. bayonet block; 46. first reset spring; 5. second reset spring; 51. connecting rope; 52. standard rope; 53. limiting slide rail; 54. limiting slider; 55. fixing block; 56. threaded rod; 57. adjusting nut. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0047] like Figure 1-14The simple insulating spanning frame for erecting wires without power outages is shown, comprising a frame mechanism, which is in four groups and is arranged in groups of two on both sides of the wire 11 to be crossed, for forming a main support; a seat mechanism, which is respectively arranged at the bottom ends of the four groups of frame mechanisms, for forming a basic support; an insulating net 21, with four corners respectively arranged on the four groups of frame mechanisms, for supporting the erection of the wire 1. When erecting, four basic footrests are formed by the four seat mechanisms, and then the frame mechanism is spliced ​​on the four seat mechanisms. The height of the frame mechanism is set according to needs and has a limited height requirement. The best height is 20 meters. When the frame mechanism is erected, the insulating net 21 is fixed to the top part so that the insulating net 21 supports the erection wire 1, thereby maintaining a safe distance between the erection wire 1 and the crossed wire 11 at the lower end to carry out power outage erection operations.

[0048] In one embodiment, the seat body mechanism includes a support base 2 and a side foot assembly arranged on the support base 2 for stabilizing the support base 2, the side foot assembly includes a transverse telescopic support rod 22 arranged on the support base 2 and a longitudinal telescopic support rod 23 arranged on the transverse telescopic support rod 22; the support base 2 is also provided with a universal wheel 24 and a traction hook 25. After the support base 2 is placed, it is necessary to cooperate with the universal level set at its upper end and the longitudinal telescopic support rod 23 on both sides for leveling, and the transverse telescopic support rod 22 can be telescoped to adapt to different terrains, so that it has the function of expanding the support surface to achieve a better stabilization effect. The setting of the universal wheel 24 can assist in the transportation of the support base 2, and the traction hook 25 can be used to pull the cable wind rope to make the crossing frame more stable as a whole.

[0049] In one embodiment, the frame structure includes a scaffolding rod 26, a working platform 27 and a tie rod 28, and the three are movably spliced ​​and assembled. The scaffolding rod 26 and the support base 2 are detachably spliced. The scaffolding rod 26 and the tie rod 28 include two types: steel pipes and insulating pipes. The scaffolding rod 26 and the support base 2 can be spliced ​​and installed through bushing fasteners fixed on the support base 2, and then the scaffolding rod 26 is used to erect the frame through standard fasteners, and a layer of working platform 27 is spliced ​​every two meters, and it is erected layer by layer. At the same time, a layer of tie rod 28 is erected every three layers, so that the integrity of the spanning frame is stronger and the high stability effect is maintained. The lower five layers are erected with steel pipes, and the upper five layers are erected with insulating rods to ensure the insulation safety of the upper half of the spanning frame.

[0050] In one embodiment, a protective mechanism for limiting the maximum sag of the installed conductor 1 is also provided on the frame mechanism, and the protective mechanism includes a traction component provided on the frame mechanism for tightening the insulating net 21 and a limiting component provided on the traction component. During the process of pulling the installed conductor 1, the installed conductor 1 will be affected by gravity and external environmental factors, thereby causing excessive sag. Because the insulating net 21 is made of elastic material and has a certain degree of extensibility, when the sag of the insulating net 21 drives the insulating net 21 to fall to a safe distance between the installed conductor 11 and the crossed conductor 11, it is easy to cause a safety hazard. Therefore, it is necessary to use a protective mechanism to control the sag of the installed conductor 1 so that it always maintains a safe distance between it and the crossed conductor 11.

[0051] In one embodiment, the traction assembly includes a fixing frame arranged at the top of the frame body mechanism for fixing the insulating net 21, a traction frame detachably connected to the scaffolding rod 26, and a reversing frame arranged on the fixing frame. The fixing frame includes a top fixing frame 3 movably connected to the scaffolding rod 26, a transverse sliding track 31 arranged on the top fixing frame 3, and a pulling hook block 32 that slides within the transverse sliding track 31. The traction frame includes a counterweight frame and a limiting frame. When the scaffolding rod 26 is erected to the top position, the four longitudinal rods thereof are left with their ends extended upward, thereby pulling the top The fixing frame 3 is fixed on the scaffolding rod 26 by a sleeve cap set at the lower end to complete the installation. The counterweight frame includes a longitudinal sliding track 33, a counterweight block 34 that slides within the longitudinal sliding track 33, and a mounting foot 35 that is set on the longitudinal sliding track 33 and is detachably connected to the sliding rail frame 36. The mounting foot 35 is buckled and installed with the longitudinal rod of the scaffolding rod 26 through a fastener fixed at its upper end, so that the longitudinal sliding track 33 is vertically set up at the side of the frame body where the scaffolding rod 26 is erected; the limiting frame includes a top fixing frame set The sliding rail frame 36 on the top fixed frame 3 and the card pin assembly that slides within the sliding rail frame 36, the reversing frame includes a reversing wheel 37 arranged on the top fixed frame 3 and a traction rope 38 that is sleeved on the reversing wheel 37 and connected to the pulling hook block 32 at one end and the counterweight block 34 at the other end. Since the mesh material of the insulating net 21 is high-strength nylon material and the cross-sectional diameter of the rope body of the net is relatively large, it is not easy to cause breakage and damage, so the four corner mesh holes of the insulating net 21 can be directly buckled on the pulling hook block 32 for fixed pulling, and the pulling hook block 32 can be used to change the mesh material. The wheel 37 is connected to the counterweight block 34, and the weight of the counterweight block 34 causes it to fall, thereby pulling the hook block 32 to slide within the transverse sliding track 31, thereby pulling the four corners of the insulating net 21, and then tightening the insulating net 21, thereby lifting the installation wire 1 at its upper end, thereby pulling the installation wire 1 and the crossed wire 11 apart to form a stable safety distance. The setting of the pin assembly ensures that the counterweight block 34 is limited so that it will not excessively pull the insulating net 21 and cause excessive tightening.

[0052] In one embodiment, the longitudinal sliding track 33 is also provided with a limited sliding groove 4 and a buffer spring 41 with one end fixed on the longitudinal sliding track 33 and the other end fixed on the counterweight 34. Side abutment plates 42 are provided on both sides of the counterweight 34 to limit sliding in the limited sliding groove 4; the latch assembly includes a locking plate frame 43 that limits sliding in the sliding rail frame 36, a latch block 45 that limits sliding in the sliding cavity groove 44 opened on both sides of the locking plate frame 43, and a first return spring 46 with one end arranged on the latch block 45 and the other end arranged on the inner wall of the sliding cavity groove 44. Through the setting of the buffer spring 41, the counterweight 34 can maintain a slow speed in the process of pulling the insulating net 21 when it falls, and the net body will not be damaged due to excessive instantaneous impulse. When the counterweight 34 pulls the insulating net 21 to a certain extent, the latch assembly can be used to lock the counterweight The locking plate frame 43 is limited in position by the connecting rope 51 so that it will not continue to fall after being limited. Specifically, the connecting rope 51 pulls the locking plate frame 43 to slide in the limited position inside the sliding rail frame 36, so that the locking pin block 45 at its upper end can be disengaged from the side abutment plates 42 on both sides of the counterweight block 34, so that the counterweight block 34 slides downward inside the limiting slide groove 4. When sliding to a certain distance, the tension of the connecting rope 51 is reduced, and the locking plate frame 43 is moved back under the action of the second return spring 5, and the locking pin block 45 located at the lower end of the side abutment plate 42 will support and install the side abutment plate 42, and the locking pin block 45 opposite to the side of the side abutment plate 42 will retract into the interior of the sliding cavity groove 44 under the abutment of the side abutment plate 42, thereby not affecting the complete rebound of the locking plate frame 43, so that it can achieve instant locking of the counterweight block 34.

[0053] In one embodiment, the limiting component includes a trigger component arranged on the pin component and an adjusting component arranged on the trigger component; the trigger component includes a second return spring 5 arranged at one end on the locking plate frame 43 and the other end on the sliding rail frame 36, a connecting rope 51 arranged on the locking plate frame 43, and a standard rope 52 arranged on the connecting rope 51; the adjusting component is in two groups and is respectively arranged at both ends of the standard rope 52, including a limiting slide rail 53 arranged at one end of the connecting rope 51 away from the locking plate frame 43, a limiting slider 54 that slides within the limiting slide rail 53 and is connected to the end of the standard rope 52, and an adjusting head arranged on the limiting slider 54; the adjusting head includes a fixed block 55 arranged on the limiting slide rail 53, a threaded rod 56 arranged on the limiting slider 54 and movably connected with the fixed block 55, and an adjusting nut 57 sleeved on the threaded rod 56 and located on the upper side of the fixed block 55. The setting height of the standard rope 52 is the maximum limiting position of the sag. When the insulating net 21 falls to the height of the standard rope 52, it will press the standard rope The cam 34 is then moved downward, so that the standard rope 52 pulls the connecting ropes 51 on both sides to pull the locking plate frame 43, so that the limitation of the counterweight block 34 is released, causing it to fall, and the upper end of the tightening hook block 32 slides inside the transverse sliding track 31, thereby pulling the four corners of the insulating net 21 to move to both sides, thereby tightening the insulating net 21 and lifting the erection conductor 1 at its upper end to a position above the height of the standard rope 52, so that the tension of the connecting rope 51 disappears, and the locking plate frame 43 rebounds to lock the counterweight block 34 to maintain the lowest point of the sag always above the standard rope 52. The adjusting component can adjust the height of the standard rope 52, thereby changing the maximum sag of the erection conductor 1 within a certain extent, and then performing adaptive adjustment according to different situations. The specific adjustment method is to rotate the adjusting nut 57 to make the threaded rod 56 slide inside the fixed block 55, thereby driving the limiting slider 54 to slide inside the limiting slide rail 53, thereby changing the height position of the standard rope 52 and realizing the adjustment of the limited height.

[0054] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A simple insulating spanning frame for wiring without power outage, characterized by: include: The frame mechanism is in four groups and arranged in pairs on both sides of the crossed wire (11) to form a main body support; The seat mechanisms are respectively arranged at the bottom ends of the four sets of frame mechanisms to form a basic support; The insulating net (21) has four corners respectively arranged on four sets of frame mechanisms and is used to support the installation of the conductor (1).

2. The simple insulating spanning frame for wiring without power outage according to claim 1, characterized in that: The seat body mechanism comprises a support base (2) and a side foot assembly arranged on the support base (2) for stabilizing the support base (2), the side foot assembly comprising a transverse telescopic support rod (22) arranged on the support base (2) and a longitudinal telescopic support rod (23) arranged on the transverse telescopic support rod (22); The support base (2) is also provided with a universal wheel (24) and a traction hook (25).

3. The simple insulating spanning frame for wiring without power outage according to claim 2 is characterized in that: The frame structure comprises a scaffolding rod (26), a working platform (27) and a tie rod (28), and the three are assembled in a movable manner. The scaffolding rod (26) and the supporting base (2) are detachably connected. The scaffolding rod (26) and the tie rod (28) are made of two types: steel pipes and insulating pipes.

4. The simple insulating spanning frame for wiring without power outage according to claim 3 is characterized in that: The frame mechanism is also provided with a protection mechanism for limiting the maximum sag of the erected conductor (1), the protection mechanism comprising a traction component provided on the frame mechanism for tightening the insulating net (21) and a limiting component provided on the traction component.

5. The simple insulating spanning frame for wiring without power outage according to claim 4 is characterized in that: The traction assembly comprises a fixing frame arranged at the top end of the frame body mechanism for fixing the insulating net (21), a traction frame detachably connected to the scaffolding rod (26), and a reversing frame arranged on the fixing frame.

6. The simple insulating spanning frame for wiring without power outage according to claim 5, characterized in that: The fixing frame comprises a top fixing frame (3) movably sleeved with a scaffolding rod (26), a transverse sliding track (31) arranged on the top fixing frame (3), and a tightening hook block (32) sliding within the transverse sliding track (31) in a limited manner.

7. The simple insulating spanning frame for wiring without power outage according to claim 6, characterized in that: The traction frame includes a counterweight frame and a limit frame; The counterweight frame comprises a longitudinal sliding track (33), a counterweight block (34) which slides within the longitudinal sliding track (33) and a mounting foot (35) which is arranged on the longitudinal sliding track (33) and is detachably connected to the sliding track frame (36); The limiting frame comprises a sliding rail frame (36) arranged on the top fixing frame (3) and a latch assembly that slides in a limiting manner in the sliding rail frame (36).

8. The simple insulating spanning frame for wiring without power outage according to claim 7, characterized in that: The reversing frame comprises a reversing wheel (37) arranged on the top fixing frame (3) and a traction rope (38) sleeved on the reversing wheel (37) and having one end connected to the pulling hook block (32) and the other end connected to the counterweight block (34).

9. The simple insulating spanning frame for wiring without power outage according to claim 8, characterized in that: The longitudinal sliding track (33) is also provided with a limit slide groove (4) and a buffer spring (41) having one end fixed on the longitudinal sliding track (33) and the other end fixed on the counterweight (34); and side abutment plates (42) are provided on both sides of the counterweight (34) for limited sliding in the limit slide groove (4); The latch assembly comprises a latch plate frame (43) that slides within a limited position in a sliding rail frame (36), a latch block (45) that slides within a sliding cavity (44) opened on both sides of the latch plate frame (43), and a first return spring (46) with one end arranged on the latch block (45) and the other end arranged on the inner wall of the sliding cavity (44).

10. The simple insulating spanning frame for wiring without power outage according to claim 9, characterized in that: The limiting assembly includes a trigger assembly arranged on the bayonet assembly and an adjustment assembly arranged on the trigger assembly; The trigger assembly comprises a second return spring (5) with one end arranged on the locking plate frame (43) and the other end arranged on the sliding rail frame (36), a connecting rope (51) arranged on the locking plate frame (43), and a standard rope (52) arranged on the connecting rope (51); The adjustment components are in two groups and are respectively arranged at the two ends of the standard rope (52), and include a limit slide rail (53) arranged at the end of the connecting rope (51) away from the locking plate frame (43), a limit slider (54) that slides within the limit slide rail (53) and is connected to the end of the standard rope (52), and an adjustment head arranged on the limit slider (54); The adjusting head comprises a fixed block (55) arranged on the limiting slide rail (53), a threaded rod (56) arranged on the limiting slide block (54) and movably connected with the fixed block (55), and an adjusting nut (57) sleeved on the threaded rod (56) and located on the upper side of the fixed block (55).

Citation Information

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