Cable pay-off roller bracket

Abstract

The utility model relates to a cable pay-off roller bracket in the field of electric power construction, which comprises two supporting frames which are identical in structure and are arranged in a bilateral symmetry mode, and a supporting rod which is rotatably erected between the tops of the two supporting frames and used for lifting a pay-off roller. The telescopic column is telescopically sleeved with the stand column, a drawing mechanism used for stretching the telescopic column is arranged on the outer side wall of the stand column, a jacking mechanism used for lifting the supporting rod is arranged at the top of the telescopic column, a carrier roller mechanism used for rotationally supporting the supporting rod is arranged above the jacking mechanism, and a brake mechanism is further arranged above the carrier roller mechanism. The lifting height of the pay-off roller is adjusted by adopting first-stage lifting of the connecting rod crow bar and second-stage lifting of the worm gear and the worm, the operation is convenient and fast, and the size and the weight are reduced; the brake device is additionally arranged, so that the wire stopping roller can be braked emergently, and the safety is higher; and the base is foldable and is provided with rollers, so that movement and transportation are convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric power construction, and particularly relates to a cable pay-off roller bracket. Background Art

[0002] Cable laying is a critical task during power line construction. Before laying, the cables are wound around pay-off rollers, requiring on-site pay-off during laying. The cable reel is generally quite heavy, so a pay-off roller bracket (referred to as a pay-off stand) is required to raise the pay-off rollers so they can rotate and facilitate pay-off. There are two common pay-off methods: vertical and horizontal. Vertical pay-off requires the cylindrical pay-off roller to be erected and placed on the pay-off stand, often requiring the assistance of a crane or forklift, making construction inconvenient. Horizontal pay-off requires simply placing the pay-off rollers directly on the pay-off stand. Therefore, large-scale cable pay-offs generally utilize the horizontal pay-off method. Of course, using horizontal pay-off also requires adjusting the height and width of the pay-off stand according to the diameter of the pay-off roller. However, the existing pay-off stand has a relatively simple structural design. The lifting height of the pay-off roller is mainly adjusted by the lifting and lowering of the hydraulic jack. The lifting speed is very slow and the operation is very inconvenient. Moreover, the weight of the hydraulic jack itself is not light. Coupled with the large size and weight of the frame, the entire pay-off stand is very bulky and inconvenient to move and transport. Moreover, most existing pay-off stands do not have a brake mechanism. Due to the large rotational inertia of the pay-off roller, it is difficult for the pay-off roller to stop in time when the pay-off needs to be stopped urgently. Therefore, it is urgent to design a new type of cable pay-off roller bracket to solve the above problems. Utility Model Content

[0003] In view of the above situation, the utility model provides a cable pay-off roller bracket, which significantly improves the flexibility, safety and operability of the entire device through reasonable structural design.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] A cable pay-off roller bracket comprises two support frames of identical structure and symmetrically arranged on the left and right, and a support rod rotatably mounted between the tops of the two support frames for lifting the pay-off roller. The support frame comprises a base and a column arranged above the base, and a telescopic column telescopically sleeved inside the column. A pulling mechanism for stretching the telescopic column is provided on the outer wall of the column. A lifting mechanism for lifting the support rod is provided on the top of the telescopic column. A roller mechanism for rotatably supporting the support rod is provided above the jacking mechanism. A brake mechanism for preventing the support rod from rotating is also provided above the roller mechanism.

[0006] Furthermore, the upright column and telescopic column are both made of square steel, the telescopic column is slidably sleeved inside the upright column, the bottom of the upright column is rotatably hinged to the top of the base through a hinge seat 1, the base is a horizontally arranged triangular frame structure, and a triangular diagonal brace is provided between the middle of the upright column and the base to enhance the upright stability of the upright column, the upper and lower ends of the triangular diagonal brace are respectively rotatably hinged to the upright column and the base through a hinge seat 2, after removing the triangular diagonal brace, the base and the upright column can be folded and stowed.

[0007] Preferably, a roller is provided on one side of the base to facilitate temporary fine-tuning of the position of the support frame.

[0008] Preferably, the support rod is further provided with a lever mechanism for ensuring synchronous rotation between the pay-off roller and the support rod. The lever mechanism comprises a sleeve sleeved on the support rod and an L-shaped lever fixedly connected to the outer wall of the sleeve, wherein the sleeve is fixed to the outer wall of the support rod by a jackscrew.

[0009] Furthermore, the pulling mechanism is a labor-saving lever prying structure, including a crowbar, a connecting rod and three articulated seats. The three articulated seats are fixed on the outer wall of the top end of the column. The fulcrum of the crowbar is hinged to the three articulated seats through the connecting rod. The front and rear side walls of the telescopic column are aligned from top to bottom and have multiple groups of adjustment through holes. The adjustment through holes are provided with positioning pins that can be inserted and removed. The head of the crowbar is fixed with a pulling hook for hooking and prying the positioning pin. The tail of the crowbar is fixed with a pressure rod handle.

[0010] Preferably, the torque from the tail end of the pressure rod handle to the fulcrum of the crowbar is greater than the torque from the head end of the pull hook to the fulcrum of the crowbar, which can save more effort when prying upward to raise the height of the telescopic column.

[0011] Furthermore, the lifting mechanism is a worm gear lifting structure, including a shell, a crank, a screw, a worm gear and a worm. The shell is fixedly connected to the top of the telescopic column, the screw vertically passes through the shell and is inserted into the interior of the telescopic column, and a guide long groove extending along its length direction is opened on the outer wall of the screw. A guide pin is fixedly provided on the inner wall of the shell to fit into the guide long groove, which is used to limit the screw to move only in the up and down directions. The worm gear and the worm are rotatably arranged inside the shell, and the lower end of the worm gear is rotatably connected to the shell through a bearing. The worm gear thread is sleeved on the screw, and the worm and the worm are meshed for transmission. One end of the worm passes through the shell and is fixed to the crank, which is used to manually crank the worm and thereby drive the screw to telescopic movement.

[0012] Furthermore, the roller mechanism is a double-roller rolling support structure, including a rectangular groove-shaped roller groove and two rolling rollers rotatably arranged inside the roller groove, which are used to form rolling support for the support rod, and the bottom of the roller groove is fixed to the top of the screw.

[0013] Furthermore, the brake mechanism is a belt clamp handbrake structure, including a brake belt for forming a friction brake on the upper side of the support rod, and a brake handle for transmitting and tightening the brake belt; one end of the brake belt is fixedly connected to the outer wall of one side of the roller groove through a pin, and the other end of the brake belt is connected to the head of the brake handle after passing through the upper side of the support rod. The head end of the brake handle is rotatably connected to the outer wall of the other side of the roller groove through a hinge seat four, serving as a downward rotation fulcrum for the brake handle, and the tail end of the brake handle is tilted upward.

[0014] Preferably, a reset torsion spring is sleeved on the hinge shaft between the head end of the brake handle and the hinge seat 4, which is used to force the brake handle to rise and reset when braking is not required.

[0015] Preferably, a detachable and replaceable rubber friction plate is provided between the middle lower side surface of the brake belt and the support rod to enhance the braking friction while protecting the brake belt from direct friction.

[0016] The present invention also includes other components that enable it to be used normally, which are all conventional means in the field. In addition, devices or components not limited in the present invention, such as: crowbars, connecting rods, locating pins, worm gears, worms, cranks, screws, rolling rollers, brake belts, reset torsion springs, rollers, articulated seats, etc., all adopt the existing technology in the field.

[0017] The beneficial effects of the utility model are as follows:

[0018] The cable pay-off roller bracket adopts a connecting rod and crowbar structure as the first-level lifting mechanism for the pay-off support height, which is used to roughly adjust the initial height of the telescopic column; and adopts a worm gear structure as the second-level lifting mechanism for the support rod, which is used to further lift the pay-off roller off the ground.

[0019] Compared with the pay-off stand that mostly uses hydraulic jacks in the prior art, the structural design of this pay-off stand is simpler and more reasonable, which helps to reduce the volume and weight of the pay-off stand and solves the problem of the pay-off stand being too bulky. At the same time, the lifting and lowering operation of the pay-off stand is also simpler and faster, which is conducive to improving the efficiency of the pay-off work.

[0020] In addition, the pay-off stand is equipped with a brake device, which can stop the rotation of the pay-off roller in time in an emergency, making it safer to use. In addition, the base of the pay-off stand is also provided with rollers, which facilitates the temporary short-distance shifting of the pay-off stand. The base also adopts a foldable storage structure, which is convenient for long-distance loading and transportation of the pay-off stand. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of the cable pay-off roller bracket in the embodiment.

[0022] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A in the middle.

[0023] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the middle roller mechanism.

[0024] Figure 4 for Figure 3 Schematic diagram of the front structure of the middle roller mechanism and the brake mechanism.

[0025] Figure 5 for Figure 1 Schematic diagram of the top view of the middle base and triangular bracing. DETAILED DESCRIPTION

[0026] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments.

[0027] It should be noted that the terms "up", "down", "front", "back", "left", "right", "inside", "outside", etc. indicating directions or positional relationships are based on the accompanying drawings and are only for the convenience of description.

[0028] Example

[0029] like Figure 1 As shown, a cable pay-off roller bracket comprises two support frames with identical structures and bilaterally symmetrical arrangement, and a support rod 1 rotatably mounted between the tops of the two support frames.

[0030] The support frame includes a base 35 and a column 2 arranged above the base, and a telescopic column 3 telescopically sleeved inside the column. A pulling mechanism for stretching the telescopic column is provided on the outer wall of the column, and a jacking mechanism for lifting the support rod is provided on the top of the telescopic column. A roller mechanism for rotatably supporting the support rod is provided above the jacking mechanism, and a brake mechanism for preventing the support rod from rotating is also provided above the roller mechanism.

[0031] When paying out the line, first stand the support frame column upright and place it properly. According to the height and width of the pay-off roller (not shown in the figure), pre-adjust the initial height of the telescopic column and the spacing width between the two support frames through the pulling mechanism to ensure that the height of the telescopic column is slightly smaller than the radius of the pay-off roller; then pass the support rod through the center hole of the cable pay-off roller, and then place the two support frames directly under the support rod, and then further fine-tune the height of the support rod through the jacking mechanism, so that the pay-off roller is completely suspended and off the ground, and then drive the pay-off roller and the support rod on the roller mechanism by dragging the cable to start rolling and paying out the line; when encountering a situation where the pay-off needs to be stopped urgently, the rotation of the support rod and the pay-off roller can be stopped urgently by the brake mechanism.

[0032] The upright column and the telescopic column are both made of square steel. The telescopic column is slidably sleeved inside the upright column, and the bottom of the upright column is rotatably hinged to the top of the base through a hinge seat 4.

[0033] like Figure 5 As shown, the base is a horizontally arranged triangular frame structure, and a triangular diagonal brace 5 is provided between the middle of the column and the base. The three sides of the square steel of the column are respectively hinged with a triangular diagonal brace to enhance the upright stability of the column. The upper and lower ends of the triangular diagonal brace are rotatably hinged to the column and the base through a hinge seat 2 6. After removing the triangular diagonal brace, the base and the column can be folded and stowed to save space and facilitate transportation.

[0034] A roller 7 is also provided on one side of the base to facilitate fine-tuning of the support frame during payout. A lever mechanism is also mounted on the support rod to ensure synchronous rotation between the payout roller and the support rod. The lever mechanism comprises a sleeve 8 that fits over the support rod and an L-shaped lever 9 fixedly connected to the outer wall of the sleeve. The sleeve is secured to the outer wall of the support rod by a jackscrew 10. The end of the L-shaped lever, away from the sleeve, can be plugged in and out of the payout roller.

[0035] The pulling mechanism is a labor-saving lever prying structure, including a crowbar 11, a connecting rod 12 and an articulated seat 3 13. The articulated seat 3 is fixed to the outer wall of the top end of the column. The fulcrum of the crowbar is hinged to the articulated seat 3 through the connecting rod. The front and rear side walls of the telescopic column are aligned from top to bottom and have multiple groups of adjustment through holes 14. The adjustment through holes are provided with locating pins 15 that can be inserted and removed. The head of the crowbar is fixed with a pulling hook 16 for hooking and prying the locating pin. The tail of the crowbar is fixed with a pressure rod handle 17.

[0036] The torque from the tail end of the pressure lever handle to the crowbar fulcrum is much greater than the torque from the head end of the pull hook to the crowbar fulcrum. When the height of the telescopic column needs to be raised, a positioning pin is first inserted into the adjustment hole on the upper part of the telescopic column. Then, the pull hook of the pry bar hooks the positioning pin. By using the principle of leverage, the pressure lever handle is pressed down to pry the telescopic column upward and pull it out. After it is raised to a certain height, another positioning pin is inserted into the pair of telescopic column adjustment holes corresponding to the top of the column to prevent the telescopic column from retracting and position the telescopic column at the pulled-out height. This completes the first height adjustment of the telescopic column. If the height of the telescopic column needs to be raised more urgently, the pull hook can be moved down to hook another positioning pin. The above pulling operation can be repeated again to complete the height raising of the telescopic column. By analogy, the height of the telescopic column can be adjusted step by step.

[0037] like Figure 2 As shown, the lifting mechanism is a worm gear lifting structure, including a housing 18, a crank 19, a screw 20, a worm wheel 21 and a worm 22. The housing is fixed to the top of the telescopic column, the screw vertically passes through the housing and is inserted into the interior of the telescopic column, and a guide long groove 23 extending along its length direction is opened on the outer wall of the screw, and a guide pin 24 is fixed on the inner wall of the housing to fit into the guide long groove, which is used to limit the screw to move only in the up and down directions. The worm wheel and the worm are rotatably arranged inside the housing, and the lower end of the worm wheel is rotatably connected to the housing through a bearing 25. The worm wheel thread is sleeved on the screw, and the worm and the worm are engaged for transmission. One end of the worm passes through the housing and is fixed to the crank, which is used to manually crank the worm and thereby drive the screw to telescope.

[0038] like Figure 3 As shown, the roller mechanism is a dual-roller rolling support structure, comprising a rectangular roller groove 26 and two rolling rollers 27 rotatably disposed within the groove to provide rolling support for the support rod. The bottom of the roller groove is fixed to the top of the screw. The dual-roller rolling support structure is conventional in the art, and the specific configuration is not further described here.

[0039] like Figure 4 As shown, the brake mechanism is a belt clamp handbrake structure, including a brake belt 28 for forming a friction brake on the upper side of the support rod, and a brake handle 29 for transmitting and tightening the brake belt; one end of the brake belt is fixedly connected to the outer wall of one side of the roller groove through a pin 30, and the other end of the brake belt is connected to the head of the brake handle after passing through the upper side of the support rod. The head end of the brake handle is rotatably connected to the outer wall of the other side of the roller groove through an articulated seat four 31, which serves as a downward rotation fulcrum for the brake handle, and the tail end of the brake handle is tilted upward.

[0040] A reset torsion spring 33 is also provided on the hinge shaft 32 between the head end of the brake handle and the hinge seat 4, which is used to force the brake handle to rise and reset when braking is not needed, so that the brake belt leaves the surface of the support rod, avoiding friction resistance to the normal rotation of the support rod when braking is not needed.

[0041] A detachable and replaceable rubber friction sheet 34 is provided between the middle lower side surface of the brake belt and the support rod, which not only enhances the friction force on the support rod but also protects the brake belt from direct friction, thereby extending the service life of the brake belt.

[0042] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. Without departing from the scope and spirit of the described embodiments, many modifications and changes are obvious to ordinary technicians in this technical field. Any technical deformation made within the spirit and principles of the present invention falls within the scope of protection of the present invention.

Claims

1. A cable pay-off roller bracket, comprising two support frames of identical structure and bilaterally symmetrical arrangement, and a support rod rotatably mounted between the tops of the two support frames for lifting the pay-off roller, characterized in that: The support frame includes a base and a column arranged above the base, and a telescopic column telescopically sleeved inside the column. A pulling mechanism for stretching the telescopic column is provided on the outer wall of the column. A jacking mechanism for lifting the support rod is provided on the top of the telescopic column. A roller mechanism for rotatably supporting the support rod is provided above the jacking mechanism. A brake mechanism for preventing the support rod from rotating is also provided above the roller mechanism.

2. The cable pay-off roller bracket according to claim 1, characterized in that: The column and telescopic column are both made of square steel. The telescopic column sliding sleeve is arranged inside the column. The bottom of the column is rotatably hinged to the top of the base through a hinge seat 1, and a triangular diagonal brace is arranged between the middle of the column and the base. The upper and lower ends of the triangular diagonal brace are respectively rotatably hinged to the column and the base through a hinge seat 2.

3. The cable pay-off roller bracket according to claim 2, characterized in that: The pulling mechanism includes a crowbar, a connecting rod and an articulated seat three. The articulated seat three is fixed on the outer side wall of the top end of the column. The fulcrum of the crowbar is hinged to the articulated seat three through the connecting rod. The front and rear side walls of the telescopic column are aligned from top to bottom and have multiple groups of adjustment through holes. The adjustment through holes are provided with positioning pins that can be inserted and removed. The head of the crowbar is fixedly connected to a pulling hook for hooking and prying the positioning pin. The tail of the crowbar is fixedly connected to a pressure rod handle.

4. The cable pay-off roller bracket according to claim 3, characterized in that: The lifting mechanism includes a shell, a crank, a screw, a worm gear and a worm. The shell is fixedly connected to the top of the telescopic column. The screw vertically penetrates the shell and is inserted into the interior of the telescopic column. A guide long groove is opened on the outer wall of the screw. A guide pin is fixedly provided on the inner wall of the shell and inserted into the guide long groove. The worm gear and the worm are rotatably arranged inside the shell. The worm gear is threadedly sleeved on the screw. The worm and the worm are meshed for transmission. One end of the worm passes through the shell and is fixedly connected to the crank.

5. The cable pay-off roller bracket according to claim 4, characterized in that: The roller mechanism includes a rectangular groove-shaped roller groove and two rolling rollers rotatably arranged inside the roller groove, which are used to form rolling support for the support rod. The bottom of the roller groove is fixedly connected to the top of the screw rod.

6. The cable pay-off roller bracket according to claim 5, characterized in that: The brake mechanism includes a brake belt for forming a friction brake on the upper side of the support rod, and a brake handle for transmitting and tightening the brake belt; one end of the brake belt is fixedly connected to the outer wall of one side of the roller groove through a pin, and the other end of the brake belt is connected to the head of the brake handle after passing through the upper side of the support rod, and the head end of the brake handle is rotatably connected to the outer wall of the other side of the roller groove through a hinge seat four.

7. The cable pay-off roller bracket according to claim 6, characterized in that: A reset torsion spring is also sleeved on the hinge shaft between the head end of the brake handle and the hinge seat 4.

8. The cable pay-off roller bracket according to claim 7, characterized in that: A detachable and replaceable rubber friction sheet is provided between the middle lower side surface of the brake belt and the supporting rod.

9. The cable pay-off roller bracket according to claim 8, characterized in that: The support rod is also provided with a lever mechanism for ensuring synchronous rotation between the pay-off roller and the support rod. The lever mechanism includes a sleeve fastened on the outer wall of the support rod by a top screw, and an L-shaped lever fixedly connected to the outer wall of the sleeve.

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