Adjustable power cable cutting equipment

Abstract

The invention relates to the technical field of wire cutting equipment, and discloses adjustable power cable cutting equipment which comprises an unwinding mechanism, a cutting table, a cutting mechanism, a straightening mechanism and a traction mechanism, and the cutting mechanism, the straightening mechanism and the traction mechanism are sequentially arranged on the cutting table in the moving direction of a cable; and the straightening mechanism comprises a rotating seat, a rotating driving assembly and two straightening treatment assemblies. By arranging the straightening mechanism, the cable is automatically straightened before being cut, the straightening mechanism mainly adopts a mode of driving a plurality of straightening rollers to rotate around the surface of the cable, and in the linear translation process of the cable, each point on the straightening rollers is in contact with different circumferential positions of the cable in sequence, so that extrusion stress can be dispersed; the straightening force is more uniformly applied to the whole circumference of the cable, and the risk of damage to the local position of the cable can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wire cutting equipment, and more specifically, to an adjustable power cable cutting equipment. Background Art

[0002] In power construction projects, cables need to be cut to a preset length before they can be used. Existing cable cutting equipment is usually equipped with a straightening mechanism, which squeezes and straightens the bent cables through multiple fixed straightening rollers, and then transports them to the cutting station for cutting through a traction mechanism. Although such equipment can achieve basic straightening functions, the cables need to withstand rigid extrusion during the straightening process, which can easily cause wear of the surface insulation layer, affecting the service life and electrical safety of the cables.

[0003] Although the existing cutting equipment has achieved basic straightening function through fixed straightening rollers, there are still some deficiencies in actual power construction. For example, when the traditional fixed straightening roller (or only translates without rotating) squeezes the cable, the contact point between the roller and the cable is relatively fixed (or only moves in a straight line). This causes the position of the force application point on the circumference of the cable to remain unchanged or change slowly, which is easy to cause excessive stress concentration or repeated rolling in local areas, which may damage the insulation layer, shielding layer or conductor itself, which is particularly dangerous for soft cables. Summary of the invention

[0004] The purpose of the present invention is to provide an adjustable power cable cutting device to solve the above-mentioned technical problems.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0006] The present invention provides an adjustable power cable cutting device, comprising: an unwinding mechanism, a cutting table, a cutting mechanism, a straightening mechanism and a traction mechanism, wherein the cutting mechanism, the straightening mechanism and the traction mechanism are sequentially arranged on the cutting table along the moving direction of the cable;

[0007] The straightening mechanism comprises a rotating seat, a rotating drive assembly and two straightening processing assemblies. The rotating seat is rotatably arranged on the cutting table. The rotating drive assembly is transmission-connected with the rotating seat and is used to drive the rotating seat to rotate around an axis perpendicular to the moving direction of the cable.

[0008] The two straightening processing components are symmetrically arranged on the rotating seat. The straightening processing components include a plurality of straightening rollers that slide linearly and evenly on the rotating seat. The straightening rollers are provided with elastic support bodies. The squeezing force generated by the straightening rollers on the cable increases successively along the forward direction of the cable.

[0009] Preferably, the straightening processing assembly further comprises a storage tank filled with lubricant, one side of the storage tank is connected to a delivery dropper for delivering lubricant to the surface of the straightening roller, and a control valve is arranged on the delivery dropper.

[0010] Preferably, an eraser for erasing the lubricant on the cable surface is provided between the straightening mechanism and the traction mechanism, and the eraser is an annular sponge.

[0011] Preferably, the straightening processing assembly further includes an adjusting member for adjusting the distance between the two straightening processing assemblies. The adjusting member includes an adjusting rotating rod rotatably mounted on a rotating seat and two movable plates threadedly connected to both ends of the adjusting rotating rod; the two movable plates are respectively connected to the corresponding straightening rollers and are slidably limited outside the rotating seat.

[0012] Preferably, a protective housing for wrapping the rotating seat is provided on the cutting table, and one side of the protective housing is openable.

[0013] Preferably, the rotation driving assembly includes a driving motor and two belt pulleys drivingly connected by a transmission belt. The two belt pulleys are respectively connected to the driving end of the driving motor and the rotating end of the rotating seat.

[0014] Preferably, the unwinding mechanism includes a base and an unwinding rotating frame rotatably mounted on the base. The cable reel is sleeved on the unwinding rotating frame.

[0015] Preferably, the traction mechanism is two traction roller groups with independent driving sources, and the two traction roller groups are respectively arranged vertically and horizontally on the cutting table.

[0016] Preferably, the cutting mechanism includes a support seat provided on the cutting table and a hydraulic cylinder provided on the support seat. The telescopic end of the hydraulic cylinder is connected with a cutting tool.

[0017] Preferably, a receiving rack for collecting the cut cable is provided at one end of the cutting table close to the cutting mechanism, and the top of the receiving rack is inclined so that the cable rolls to its lower end.

[0018] The beneficial effects of the present invention are as follows:

[0019] By setting the straightening mechanism, the present invention automatically straightens the cable before cutting. The straightening mechanism mainly adopts the method of driving multiple straightening rollers to rotate around the cable surface. During the linear translation of the cable, each point on the straightening roller sequentially contacts different circumferential positions of the cable, which can disperse the extrusion stress and make the straightening force more evenly applied to the entire circumference of the cable, reducing the risk of local damage to the cable; in addition, the straightening rollers adopt a progressive pressure application method, gently straightening with an initial low pressure to eliminate large bends, and the subsequent pressure gradually increases for precise shaping to protect the surface, while the elastic support body adaptively adjusts the pressure to reduce scratching, further reducing the wear on the cable and improving the straightening effect; at the same time, the distance adjusting member is also used to adapt to different thickness cables to improve the versatility of the equipment. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of an adjustable power cable cutting device provided by the present invention;

[0021] Figure 2 It is a schematic structural diagram among a cutting table, a straightening mechanism, a traction mechanism and a cutting mechanism in an adjustable power cable cutting device provided by the present invention;

[0022] Figure 3 It is a schematic structural diagram of a straightening mechanism in an adjustable power cable cutting device provided by the present invention;

[0023] Figure 4 It is a schematic structural diagram between a rotating seat and a straightening processing component in an adjustable power cable cutting device provided by the present invention;

[0024] Figure 5 It is a schematic structural diagram of a straightening roller in an adjustable power cable cutting device provided by the present invention;

[0025] Figure 6 It is a schematic structural diagram between an adjusting part and a straightening roller in an adjustable power cable cutting device provided by the present invention;

[0026] Figure 7 It is a schematic structural diagram of a cutting mechanism in an adjustable power cable cutting device provided by the present invention;

[0027] Figure 8 It is a schematic structural diagram of a pay-off mechanism in an adjustable power cable cutting device provided by the present invention.

[0028] In the figure: 1. Pay-off mechanism; 11. Base; 12. Pay-off rotating frame; 2. Cutting table; 3. Cutting mechanism; 31. Support seat; 32. Hydraulic cylinder; 33. Cutting tool; 4. Straightening mechanism; 41. Rotating seat; 42. Rotating drive assembly; 421. Driving motor; 422. Belt pulley; 43. Straightening processing component; 431. Straightening roller; 432. Elastic support body; 433. Storage tank; 434. Delivery dropper; 435. Adjusting rotating rod; 436. Movable plate; 44. Protective housing; 5. Traction mechanism; 6. Erasing body; 7. Receiving rack body; 8. Cable. Detailed implementation manners

[0029] Reference will now be made to example embodiments to discuss the subject matter described herein. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example may omit, substitute, or add various processes or mechanisms as needed. In addition, the features described relative to some examples can also be combined in other examples.

[0030] Please refer to Figures 1 to 5 , an adjustable power cable cutting device, comprising: a unwinding mechanism 1, a cutting table 2, a cutting mechanism 3, a straightening mechanism 4 and a traction mechanism 5. Among them, the cutting mechanism 3, the straightening mechanism 4 and the traction mechanism 5 are sequentially arranged on the top surface of the cutting table 2. The unwinding mechanism 1 is used to gradually unwind the cable roll 8 placed thereon. The cutting mechanism 3 is used to cut off the cable 8, and the traction mechanism 5 is used to drive the cable 8 to linearly move on the cutting table 2, so that the cable 8 can move from the unwinding mechanism 1 to the position of the cutting mechanism 3, and the traction speed is generally 5-20 m / min, maintaining a slow movement.

[0031] The straightening mechanism 4 includes a rotating seat 41, a rotating drive assembly 42 and a straightening processing assembly 43. The rotating seat 41 is rotatably arranged on the cutting table 2. The rotating seat 41 is a rectangular frame body with open top and bottom. The rotating drive assembly 42 is in transmission connection with the rotating end of the rotating seat 41, and is used to drive the rotating seat 41 to rotate self about an axis perpendicular to the moving direction of the cable 8; a protective housing 44 for wrapping the rotating seat 41 is arranged on the cutting table 2. One side of the protective housing 44 is openable. The protective housing 44 is used to protect and isolate the rotating seat 41 to prevent it from being interfered externally during rotation; the straightening processing assembly 43 includes two straightening processing assemblies 43 symmetrically arranged on the rotating seat 41. The two straightening processing assemblies 43 are respectively located at the opening positions at the top and bottom of the rotating seat 41. Each straightening processing assembly 43 includes four straightening rollers 431 linearly and evenly sliding on the rotating seat 41. The straightening rollers 431 at the top and bottom of the rotating seat 41 are arranged in a staggered manner in sequence. The included angle between each straightening roller 431 and the side wall of the rotating seat 41 is 30-45 degrees. An elastic support 432 is arranged on the straightening roller 431. The elastic support 432 is generally a metal spring. The elastic support 432 provides an elastic force perpendicular to the opening side of the rotating seat 41 for the straightening roller 431, so that the straightening roller 431 has a certain self-adaptive ability. The extrusion force generated by the straightening roller 431 on the cable 8 increases sequentially along the advancing direction of the cable 8.

[0032] It should be noted that the straightening mechanism 4 of the present invention is applicable to high-voltage cables 8 of 110 kV / 132 kV class, and the gradient ratio of the extrusion pressure is 1:2:3:3.75. The spring elastic coefficient can be 100-200 N / mm. For the extrusion pressure of the straightening roller 431, it can be calculated by the formula where K is the spring elastic coefficient, ΔS is the working stroke of the spring, and ΔS max is the maximum stroke of the spring, and η is the preloading coefficient (taking 0.2-0.3).

[0033] When the above cutting equipment is in use, first pull out the starting end of the cable 8, and make it pass through the straightening mechanism 4 and the traction mechanism 5 in sequence. Through the traction force of the traction mechanism 5, the cable 8 can be driven to start linear translation. At the same time, the rotary driving assembly 42 is used to drive the rotary seat 41 to start self-rotation, so that the straightening roller 431 starts to rotate around the surface of the cable 8. Through the rotational rolling extrusion of the straightening roller 431, the cable 8 is deformed and finally restored to a straight state. Since the initial elastic coefficient of the straightening roller 431 is small, the extrusion effect on the cable 8 is relatively weak, and the cable 8 is initially extruded and straightened. As the elastic coefficient of the subsequent straightening roller 431 gradually increases, the extrusion effect on the cable 8 is stronger, and finally the cable 8 is restored to a straight state. By adopting the method of gradually increasing the extrusion effect, on the one hand, the wear of the cable 8 can be reduced. The straightened cable 8 is driven by the traction mechanism 5 and moves to the position of the cutting mechanism 3. After reaching the preset length, it can be cut off by the cutting mechanism 3.

[0034] Adopting the above progressive pressure straightening method, compared with the existing fixed extrusion straightening method, it cleverly utilizes the principle of progressive pressure and combines the advantages of the rotating roller, can significantly improve the straightening effect and effectively protect the surface of the cable 8, and has the following advantages:

[0035] Initial stage (low elasticity): The spring elastic coefficient of the straightening roller 431 at the entrance is small, and the applied pressure is also small. This allows the cable 8 to start entering the straightening process in a relatively "gentle" way, mainly used to initially eliminate large bends and guide the cable 8 to stably enter the straightening line, avoiding deformation, jumping off or surface indentation of the cable 8 caused by sudden strong extrusion;

[0036] Middle stage (medium elasticity): As the cable 8 advances, the spring elastic coefficient of the subsequent rollers gradually increases, and the applied pressure also increases accordingly. At this time, the bending amount of the cable 8 has decreased, and a greater force is required to straighten the remaining relatively small bends (such as fine wavy or small local bends); Progressive pressure conforms to the material deformation law, can more effectively overcome the material yield strength, and obtain better straightness.

[0037] Final stage (high elasticity): The elastic coefficient of the roller at the outlet is the highest, applying the maximum pressure. This is for precise straightening (sizing) and eliminating elastic recovery, ensuring that the cable 8 finally achieves the required straightness and roundness stability when leaving the straightening mechanism 4. The high pressure helps to "fix" the straightening effect.

[0038] This stepped pressure application method is more scientific and efficient than uniform pressure or fixed pressure, and can obtain a straighter and rounder straightening effect while reducing residual stress. It can protect the surface of the cable 8, reduce damage, and avoid "rigid impact". The low-elasticity roller at the inlet avoids the rigid impact when the cable 8 initially contacts the straightening mechanism 4. Especially for the cable 8 with large bends or "memory loops" after coiling, it can effectively prevent surface indentation, insulation layer deformation or conductor damage (especially for stranded multi-strand wires). The spring provides passive adaptability. Even if the cable 8 has slight diameter tolerance, ovality or surface irregularities (within the allowable range), the spring can automatically adjust the roller height through compression / extension, making the pressure relatively stable, ensuring good contact and no overload, and reducing the risk of scratching or wear caused by "hard point" contact. In addition, the adaptability of the spring combined with the uniform force application of the rotating roller disperses the pressure to the greatest extent and reduces the frictional resistance, providing excellent protection for the surface of the cable 8 (especially for smooth, soft or coated insulation layers). Secondly, the spring pressure mechanism and the rotary drive are functionally decoupled. The spring only provides the vertical pressure, and the rotary drive provides the circumferential movement of the roller. This design allows the two to work independently, simplifying the force condition of the rotary drive components (mainly bearing torque, and the spring force is borne by the support structure).

[0039] Please refer to Figures 4 to 5 , in order to further reduce the wear on the surface of the cable 8, the present invention is further improved on the basis of the above solution. Specifically, the straightening treatment assembly 43 further includes a storage tank 433 filled with lubricant. The storage tank 433 is fixedly installed on the rotating seat 41. One side of the storage tank 433 is connected to a delivery dropper 434 for delivering lubricant to the surface of the straightening roller 431. The delivery dropper 434 is a tee pipe, and the two ends of its branch extend to the left and right sides of the straightening roller 431 respectively, and can slowly drip lubricant onto the surface of the straightening roller 431. A control valve is provided on the delivery dropper 434. The control valve is generally an electronic valve, and the dripping speed of the delivery dropper 434 is adjusted through the control valve. A wiping body 6 for wiping the lubricant on the surface of the cable 8 is provided between the straightening mechanism 4 and the traction mechanism 5. The wiping body 6 is a flexible oil-absorbing material, specifically an annular sponge. Before the straightened cable 8 enters the cutting mechanism 3, the lubricant on the surface of the cable 8 is wiped by the annular sponge, facilitating the subsequent handling and use of the cable 8.

[0040] By adding a mechanism for automatically adding lubricant, the friction between the straightening roller 431 and the cable 8 is reduced by the lubricant. At the same time, the lubricant can also cool the straightening roller 431 to prevent the surface temperature of the straightening roller 431 from being too high.

[0041] Please refer to Figure 3 and Figure 6 In order to adapt to cables 8 of different thicknesses, the present invention further improves the above solution. Specifically, the straightening processing component 43 further includes an adjusting member for adjusting the distance between two straightening processing components 43. The adjusting member includes an adjusting rotating rod 435 rotatably mounted on a rotating seat 41 and two movable plates 436 threadedly connected to both ends of the adjusting rotating rod 435. The adjusting rotating rod 435 is a screw rod with opposite threads at both ends. The two movable plates 436 are respectively connected to the corresponding straightening rollers 431, and the movable plates 436 slide on the outside of the rotating seat 41.

[0042] When it is necessary to adjust the distance between two straightening processing components 43, by rotating the adjusting rotating rod 435, it can drive the two movable plates 436 to move synchronously towards each other, and the two straightening processing components 43 move synchronously towards each other, so that the distance between them changes until the distance reaches the required size. Then stop rotating the adjusting rotating rod 435. Under the locking action of its own threads, the two movable plates 436 can stop moving and remain in a locked state. In this way, by further setting the adjusting member, the distance between the upper and lower straightening processing components 43 can be adjusted to meet the usage requirements of cables 8 of different thicknesses, and the usage flexibility of the cutting equipment is further increased.

[0043] Please refer to Figure 3 The rotation driving component 42 includes a driving motor 421 and two belt wheels 422 connected by a transmission belt. The two belt wheels 422 are respectively connected to the driving end of the driving motor 421 and the rotating end of the rotating seat 41.

[0044] Please refer to Figure 2 and Figure 7 The unwinding mechanism 1 includes a base 11 and an unwinding turntable 12 rotatably mounted on the base 11. The cable 8 is wound around the unwinding turntable 12. The traction mechanism 5 is two traction roller groups with independent driving sources. The two traction roller groups are respectively arranged vertically and horizontally on the cutting table 2. The cutting mechanism 3 includes a support seat 31 arranged on the cutting table 2 and a hydraulic cylinder 32 arranged on the support seat 31. The telescopic end of the hydraulic cylinder 32 is connected with a cutting tool 33.

[0045] Please refer to Figure 2 and Figure 8, for the convenience of automatically collecting the cut cable 8, the present invention further provides a material receiving frame 7, specifically: a material receiving frame 7 for collecting the cut cable 8 is provided at one end of the cutting table 2 close to the cutting mechanism 3, and the top of the material receiving frame 7 is inclined so that the cable 8 can roll to its lower end.

[0046] Before the cable 8 reaches the preset cutting length, it moves from the position of the cutting mechanism 3 to the high point position of the top of the material receiving frame 7, and then continues to translate at the high point position of the material receiving frame 7. After the cable 8 is cut, under the action of gravity, the cable 8 rolls along the inclined surface of the material receiving frame 7 to the low point position. In this way, the cut cable 8 can be automatically stacked at the low point position of the material receiving frame 7.

[0047] The embodiments of the present invention have been described above, but the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of the present invention.

Claims

1. An adjustable power cable cutting device, comprising: A pay-off mechanism, a cutting table, a cutting mechanism, a straightening mechanism and a traction mechanism. The cutting mechanism, the straightening mechanism and the traction mechanism are sequentially arranged on the cutting table along the moving direction of the cable. It is characterized in that: The straightening mechanism includes a rotating seat, a rotating drive assembly and two straightening treatment assemblies. The rotating seat is rotatably arranged on the cutting table. The rotating drive assembly is in transmission connection with the rotating seat and is used to drive the rotating seat to rotate around an axis perpendicular to the moving direction of the cable. The two straightening treatment assemblies are symmetrically arranged on the rotating seat. The straightening treatment assembly includes a plurality of straightening rollers that slide linearly and uniformly on the rotating seat. An elastic support body is arranged on the straightening rollers. The extrusion force generated by the straightening rollers on the cable increases sequentially along the advancing direction of the cable.

2. An adjustable power cable cutting device according to claim 1, characterized in that, The straightening treatment assembly further includes a storage tank filled with lubricant. One side of the storage tank is communicated with a delivery dropper for delivering lubricant to the surface of the straightening rollers. A control valve is arranged on the delivery dropper.

3. An adjustable power cable cutting device according to claim 2, characterized in that, An eraser for erasing the lubricant on the surface of the cable is arranged between the straightening mechanism and the traction mechanism. The eraser is made of flexible oil-absorbing material.

4. An adjustable power cable cutting device according to claim 1, characterized in that, The straightening treatment assembly further includes an adjusting member for adjusting the distance between the two straightening treatment assemblies. The adjusting member includes an adjusting rotating rod rotatably arranged on the rotating seat and two movable plates threadedly connected to both ends of the adjusting rotating rod. The two movable plates are respectively connected to the corresponding side of the straightening rollers and are slidably limited outside the rotating seat.

5. An adjustable power cable cutting device according to claim 1, characterized in that, A protective housing for wrapping the rotating seat is arranged on the cutting table. One side of the protective housing is openable.

6. An adjustable power cable cutting device according to claim 1, characterized in that, The rotating drive assembly includes a drive motor and two belt wheels connected by a transmission belt. The two belt wheels are respectively connected to the drive end of the drive motor and the rotating end of the rotating seat.

7. An adjustable power cable cutting device according to claim 1, characterized in that, The pay-off mechanism includes a base and a pay-off rotating frame rotatably arranged on the base. A cable reel is sleeved on the pay-off rotating frame.

8. An adjustable power cable cutting device according to claim 1, characterized in that, The traction mechanism is two traction roller groups with independent drive sources. The two traction roller groups are respectively arranged vertically and horizontally on the cutting table.

9. An adjustable power cable cutting device according to claim 1, characterized in that, The cutting mechanism includes a support seat arranged on the cutting table and a hydraulic cylinder arranged on the support seat. The telescopic end of the hydraulic cylinder is connected with a cutting tool.

10. An adjustable power cable cutting device according to claim 1, characterized in that, A material receiving frame body for collecting the cut cable is arranged at one end of the cutting table close to the cutting mechanism. The top of the material receiving frame body is inclined so that the cable rolls to its lower end.

Images