Portable low-voltage power cable stripping device

Abstract

The invention discloses a portable low-voltage power cable stripping device, relates to cable stripping equipment, and aims to solve the problem that an existing stripping device cannot adapt to cables of multiple specifications. A clamping and conveying mechanism is used for clamping and conveying a to-be-stripped cable to a cutter at a constant speed; a plurality of second screw rods are uniformly arranged on the annular support in the circumferential direction, one end of each second screw rod penetrates in from the outer wall of the annular support and penetrates out from the inner wall of the annular support, and meanwhile, the second screw rods are connected with the annular support through threads; the multiple Hall blades correspond to the multiple second screws one to one, the Hall blades are fixed to the ends, located on the inner wall, of the second screws, and the cutting edges of the Hall blades all face the circle center direction. The portable cable stripping tool has the beneficial effects that the problems of tedious operation, poor adaptability and low efficiency in the existing cable stripping operation are solved, portability and practicability are perfectly combined, an efficient and flexible earlier-stage processing tool is provided for a power cable detection test, and smooth proceeding of power system detection work is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to a cable stripping device. BACKGROUND

[0002] Low-voltage power cable (hereinafter referred to as "cable") is the key power transmission carrier in the alternating current 1kV and below distribution system, widely used in industrial equipment, municipal infrastructure and residential power terminal, known as the "power blood vessels" to ensure the stable operation of the power system; the operation reliability of the cable is directly related to the safety and power supply quality of the entire distribution system, therefore, before the cable is put into operation, during operation or after failure, a plurality of electrical performance evaluations including insulation performance detection, conductor continuity test, partial discharge test and the like need to be carried out; the common prerequisite for the above detection work is to strip the outer sheath of the cable safely, efficiently, non-destructively or low-loss to expose the internal structure (such as insulation layer, shielding layer, conductor, etc.), providing an operating interface for subsequent tests; however, the current industry generally adopted manual stripping method has the following significant defects:

[0003] Low stripping efficiency: operation depends on manual experience, stripping speed is limited by operator proficiency, single cable processing time is long, and it is difficult to meet the time efficiency demand in batch detection or emergency repair scene.

[0004] High safety risk: manual cutter is easy to slip, which has the risk of cutting the operator; at the same time, the cutting depth is difficult to control accurately, which is easy to damage the internal insulation layer and cause secondary quality hidden trouble.

[0005] Poor adaptability: the thickness and material of the outer sheath of different specifications of cables are significantly different, and the existing cutter needs to be frequently replaced or adjusted, which has insufficient universality.

[0006] Weak environmental adaptability: in complex operation environments such as field, tunnel, narrow space and the like, there is lack of stable support platform, and manual operation is further difficult, and even operation cannot be carried out.

[0007] Although some units try to introduce large automatic stripping equipment, the large automatic stripping equipment generally has problems of large size, inconvenient carrying and the like, and is only suitable for laboratory or factory environment, and cannot adapt to the urgent demand of "on-site, rapid and portable" in power repair site; therefore, developing a portable stripping device with compact structure, simple operation and adaptability to multiple specifications of cables has become a technical bottleneck to be solved in the field of power operation and detection. SUMMARY

[0008] The present application aims to solve the problem that the existing stripping device cannot adapt to multiple specifications of cables, and provides a portable low-voltage power cable stripping device.

[0009] The portable low-voltage power cable stripping device comprises a clamping conveying mechanism, a cutter and a ring support;

[0010] The clamping conveying mechanism is used for clamping and conveying the cable to be stripped at a constant speed to the cutter;

[0011] The cutter comprises a plurality of H-shaped blades and a plurality of second screws, the plurality of second screws are uniformly arranged on the ring support in the circumferential direction, one end of each of the plurality of second screws penetrates the outer wall of the ring support and the other end of each of the plurality of second screws penetrates the inner wall of the ring support, and the plurality of second screws are connected with the ring support through threads; the plurality of H-shaped blades and the plurality of second screws are in one-to-one correspondence, the H-shaped blade is fixed at the end of the second screw located at the inner wall, and the cutting edges of the H-shaped blades all face the center of the circle.

[0012] Further, the clamping conveying mechanism comprises a driving roller, a driven roller, a gearbox, a motor, two U-shaped frames, two first screws, a fixed shaft, two first handles and an auxiliary box;

[0013] One end of the driving roller is connected to the side wall of the gearbox, and the other end of the driving roller is connected to the side wall of the auxiliary box;

[0014] The motor is fixed to the side wall of the gearbox opposite to the side wall connected with the driving roller, and the motor drives the driving roller to rotate through the gearbox;

[0015] The open ends of the two U-shaped frames are fixed to the top surface of the gearbox and the top surface of the auxiliary box respectively;

[0016] The two ends of the fixed shaft are respectively provided with connecting holes; the bottom ends of the two first screws are respectively inserted into the connecting holes at the two ends of the fixed shaft, and two limiting mechanisms are arranged at the bottom end of each first screw, and the limiting mechanisms are used for preventing the fixed shaft from being separated from the first screw;

[0017] The two first screws are arranged on the top of the two U-shaped frames in a threaded connection manner;

[0018] The two first handles are respectively fixed to the top ends of the two first screws;

[0019] The driven roller is arranged above the driving roller in a shaft connection manner through the fixed shaft, the central axis of the fixed shaft coincides with the central axis of the driven roller, and the central axis of the driven roller is in the same plane as the central axis of the driving roller.

[0020] Further, the middle part of the driving roller is provided with an annular groove in the circumferential direction, and the same annular groove is formed on the driven roller in the circumferential direction at the position opposite to the annular groove of the driving roller.

[0021] Further, the surface of the driving roller is coated with wear-resistant rubber.

[0022] Further, the foldable tripod support frame is further included;

[0023] The leg length of the foldable tripod support frame is adjustable, and a quick disassembly and assembly interface is arranged on the annular support frame and is in butt joint with the top of the foldable tripod support frame.

[0024] Further, the plurality of H-shaped blades included in the cutter is four, the blade thickness of the H-shaped blade is 2 mm, the blade edge wedge angle is 25 DEG ± 2 DEG, and the blade edge starting end of the H-shaped blade is provided with a guide circular arc with a radius of 0.5 mm.

[0025] Further, the cutter further includes a second handle;

[0026] The second handle is fixed at one end of the second screw rod located on the outer wall.

[0027] The thread spacing of the second screw rod is 0.1 mm / grade.

[0028] Further, the back of the H-shaped blade is provided with a longitudinal chip removal groove, and the chip removal groove depth is 30% to 40% of the H-shaped blade thickness.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] Through the design of the "clamping conveying mechanism + annular support + adjustable H-shaped blade cutting", the pain points of "complicated operation, poor adaptability and low efficiency" in the existing cable stripping operation are solved, the portability and practicality are perfectly combined, a high-efficiency and flexible pre-processing tool is provided for power cable detection test, and the smooth progress of power system detection work is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The whole structure schematic diagram of the portable low-voltage power cable stripping device is shown in the specific embodiment one.

[0032] Figure 2 The specific structure schematic diagram of the cutter in the specific embodiment one is shown.

[0033] Figure 3 The specific structure schematic diagram of the clamping conveying mechanism in the specific embodiment two is shown.

[0034] Figure 4 The side view of the clamping conveying mechanism in the specific embodiment two is shown.

[0035] Wherein, 1 is the cable to be stripped; 2 is a clamping conveying mechanism; 2-1 is a driving roller; 2-2 is a driven roller; 2-3 is a gearbox; 2-4 is a motor; 2-5 is a U-shaped frame; 2-6 is a first screw rod; 2-7 is a fixed shaft; 2-8 is a first handle; 2-9 is an auxiliary box; 3 is a cutter; 3-1 is a H-shaped blade; 3-2 is a second screw rod; 3-3 is a second handle; 4 is an annular support; 5 is a foldable triangular support. DETAILED DESCRIPTION

[0036] DETAILED DESCRIPTION Figure 1 and Figure 2 The embodiment is described, and the portable low-voltage power cable stripping device comprises a clamping conveying mechanism 2, a cutter 3, and an annular support 4;

[0037] The clamping conveying mechanism 2 is used for clamping and conveying the cable to be stripped 1 to the cutter 3 at a constant speed;

[0038] The cutter 3 comprises a plurality of H-shaped blades 3-1 and a plurality of second screw rods 3-2, the plurality of second screw rods 3-2 are uniformly arranged on the annular support 4 in the circumferential direction, one end of each of the plurality of second screw rods 3-2 penetrates the outer wall of the annular support 4, and the other end of each of the plurality of second screw rods 3-2 penetrates the inner wall of the annular support 4, and the plurality of second screw rods 3-2 and the annular support 4 are connected through threads; the plurality of H-shaped blades 3-1 and the plurality of second screw rods 3-2 are in one-to-one correspondence, the H-shaped blade 3-1 is fixed at one end of the second screw rod 3-2 located on the inner wall, and the cutting edges of the H-shaped blades 3-1 all face the center of the circle.

[0039] In the embodiment, the distance between the cutting edges of the plurality of H-shaped blades 3-1 and the center of the annular support 4 is changed to adapt to different specifications of the cable to be stripped 1; the plurality of H-shaped blades 3-1 are H-shaped blades that are uniformly arranged around the point axis of the cable to be stripped 1 and have independently adjustable radial positions, the H-shaped blades 3-1 are made of high-carbon stainless steel, and are used for continuously cutting the outer sheath of the cable to be stripped 1 during the conveying process of the cable to be stripped 1 by the clamping conveying mechanism 2; when the H-shaped blades 3-1 cut, the entire cutting edge can gradually participate in the work, the lever effect is exerted, the pressure required for cutting the outer sheath of the cable to be stripped 1 is small, time is saved, and the work is efficient; the H-shaped blades 3-1 have a long service life and a small maintenance cost, even if the blade body is worn and passivated, the cutting edge part is still sharp and sharp, and can pierce and cut open objects; the weight of the entire machine is ≤6 kg, and the machine can be carried by one hand, meets the on-site, rapid, and portable requirements of the repair site, the plurality of H-shaped blades 3-1 are arranged in a ring, the stripping efficiency is 8-10 times that of manual operation, and the cut is neat and does not damage the internal insulation layer.

[0040] DETAILED DESCRIPTION Figure 3 and Figure 4The embodiment is further limited to the portable low-voltage power cable stripping device of the first embodiment, wherein the clamping and conveying mechanism 2 comprises a driving roller 2-1, a driven roller 2-2, a gearbox 2-3, a motor 2-4, two U-shaped frames 2-5, two first screw rods 2-6, a fixed shaft 2-7, two first handles 2-8 and an auxiliary box 2-9.

[0041] One end of the driving roller 2-1 is connected to the side wall of the gearbox 2-3, and the other end of the driving roller 2-1 is connected to the side wall of the auxiliary box 2-9.

[0042] The motor 2-4 is fixed to the side wall of the gearbox 2-3 opposite to the driving roller 2-1, and the motor 2-4 can drive the driving roller 2-1 to rotate through the gearbox 2-3.

[0043] The open ends of the two U-shaped frames 2-5 are fixed to the top surface of the gearbox 2-3 and the top surface of the auxiliary box 2-9, respectively.

[0044] The two ends of the fixed shaft 2-7 are provided with connecting holes, respectively; the bottom ends of the two first screw rods 2-6 are inserted into the connecting holes at the two ends of the fixed shaft 2-7, and two limiting mechanisms 2-10 are arranged at the bottom end of each first screw rod 2-6, which are used to prevent the fixed shaft 2-7 from being separated from the first screw rod 2-6.

[0045] The two first screw rods 2-6 are arranged on the top of the two U-shaped frames 2-5 in a threaded connection manner, respectively.

[0046] The two first handles 2-8 are fixed to the top ends of the two first screw rods 2-6, respectively.

[0047] The driven roller 2-2 is arranged above the driving roller 2-1 in a shaft connection manner through the fixed shaft 2-7, and the central axis of the fixed shaft 2-7 coincides with the central axis of the driven roller 2-2, and the central axis of the driven roller 2-2 is parallel to the central axis of the driving roller 2-1.

[0048] In the embodiment, the cable to be stripped 1 is clamped by the driving roller 2-1 and the driven roller 2-2, the driving roller 2-1 is driven to rotate by the motor 2-4 and the gearbox 2-3, and then drives the cable to be stripped 1 to feed to the cutter 3 at a constant speed, and the driven roller 2-2 is pressed on the upper part of the cable to be stripped 1 to prevent the cable to be stripped 1 from being separated from the driving roller 2-1; the driven roller 2-2 is driven to rotate passively under the action of the cable to be stripped 1 and the friction force, and the friction force between the driven roller 2-2 and the cable to be stripped 1 is reduced; wherein the driving mode of “motor 2-4→gearbox 2-3→driving roller 2-1” is adopted, and 0-5 m / min stepless speed regulation is matched to realize constant-speed wire feeding, ensure consistent stripping depth, and avoid insulation scratches caused by “shallow and deep”.

[0049] Specific embodiment three, the embodiment is a further limitation of the portable low-voltage power cable stripping device described in specific embodiment two, in the embodiment, the middle part of the driving roller 2-1 is provided with an annular groove along the circumference thereof, and the same annular groove is formed on the driven roller 2-2 at the position opposite to the annular groove of the driving roller 2-1 along the circumference of the driven roller 2-2.

[0050] In the embodiment, the driving roller 2-1 and the driven roller 2-2 are synchronously provided with annular grooves to form a “V”-shaped positioning surface, the cable to be stripped 1 is automatically centered, and the eccentric cutting caused by deviation is eliminated, further reducing the probability of damage to the internal layers of the cable to be stripped 1; the depth of the annular groove is 3 mm, which can remove the dirt or ice on the surface of the cable to be stripped 1, avoid foreign matter from being wrapped into the cutter 3, and ensure stable wire feeding in cold and humid environments.

[0051] Specific embodiment four, the embodiment is a further limitation of the portable low-voltage power cable stripping device described in specific embodiment two or three, in the embodiment, the surface of the driving roller 2-1 is coated with wear-resistant rubber.

[0052] In the embodiment, the friction coefficient of the rubber is 0.8, which is 3 times higher than that of the smooth metal roller, and the wire can be fed horizontally at a 0° slope without additional manpower; the thickness of the rubber layer is 5 mm, which can elastically deform when encountering a convex character on the surface of the outer sheath of the cable to be stripped 1 or a heat shrink tube, maintain the clamping force without attenuation, and the wire slipping rate is less than 0.5%; the surface of the driving roller 2-1 is coated with wear-resistant rubber to increase the friction coefficient with the cable to be stripped 1, and realize stepless speed regulation conveying at 0-5 m / min.

[0053] Embodiment five, this embodiment is further limited to the portable low-voltage power cable stripping device described in embodiment one, in this embodiment, further comprising a foldable triangular support 5;

[0054] The leg length of the foldable tripod support 5 is adjustable, and a quick disassembly interface is arranged on the annular support 4 and is in butt joint with the top of the foldable triangular support 5.

[0055] In this embodiment, the foldable tripod support 5 is unfolded or stored within 1 min, and the overall center of gravity after unfolding is lower than the center line of the cable to be stripped 1 by 20 mm, so as to improve the stability, and the anti-overturning moment is increased by 40%, and stable operation can still be realized on uneven ground such as tunnel slope and trench; the total weight of the foldable tripod support 5 is ≤4 kg, and the size of the folded shape is ≤450 mm×200 mm×150 mm, which meets the requirements of single person carrying and high-altitude operation carrying.

[0056] Embodiment six, this embodiment is further limited to the portable low-voltage power cable stripping device described in embodiment one, in this embodiment, the cutter 3 comprises four pieces of H-shaped blade 3-1, the blade thickness of the H-shaped blade 3-1 is 2 mm, the blade edge wedge angle is 25°±2°, and the blade edge starting end of the H-shaped blade 3-1 is provided with a guide circular arc with a radius of 0.5 mm.

[0057] In this embodiment, the combination of the blade edge wedge angle and the guide circular arc reduces the initial piercing force by 30%, prevents the blade edge from “biting” and jamming, and the one-time cutting success rate is greater than 98%; the guide circular arc is used to reduce the peak resistance and prevent the H-shaped blade 3-1 from jamming at the moment of cutting into the cable to be stripped 1; the four pieces of H-shaped blade 3-1 are symmetrically arranged, the radial force is mutually offset, the cable to be stripped 1 is not subjected to lateral bending moment, the vibration amplitude in the cutting process is less than 0.2 mm, and the optical unit in the internal optical fiber composite cable is protected.

[0058] Embodiment seven, this embodiment is further limited to the portable low-voltage power cable stripping device described in embodiment one, in this embodiment, the cutter 3 further comprises a second handle 3-3;

[0059] The second handle 3-3 is fixed at one end of the second screw rod 3-2 located on the outer wall;

[0060] The thread spacing of the second screw rod 3-2 is 0.1 mm / grade.

[0061] In the embodiment, the Hob blade 3-1 is fed by 0.1 mm for each rotation of the second handle 3-3, realizing "micron level" depth control, and the outer sheath thickness of the cable to be stripped 1 can be adjusted to the right once, with 0% rework rate, to adapt to the low-voltage cable to be stripped 1 with an outer diameter of 5 mm to 50 mm; the self-locking of the threaded pair is adopted, the cutting counterforce will not cause the blade to retreat, the set depth is still maintained during long-time operation, and the quality risk of "cutting deeper and deeper" is avoided.

[0062] Specific embodiment eight, the embodiment is a further limitation of the portable low-voltage power cable stripping device described in specific embodiment one, in the embodiment, the back of the Hob blade 3-1 is provided with a longitudinal chip removal groove, and the depth of the chip removal groove is 30% to 40% of the thickness of the blade body of the Hob blade 3-1.

[0063] In the embodiment, the chip removal groove is used for automatically discharging the outer sheath cuttings during continuous stripping, and the outer sheath cuttings will not block the back of the knife, and the continuous stripping length can reach 100 m without stopping for cleaning; the chip removal direction is consistent with the axial direction of the cable to be stripped 1, and the outer sheath cuttings automatically fall to the ground, reducing the secondary cleaning workload in the air or in the tunnel, and improving the on-site civilized construction score by more than 20%.

[0064] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A portable low voltage power cable stripping device, characterised in that, It comprises a clamping conveying mechanism (2), a cutter (3) and a ring-shaped support (4); The clamping conveying mechanism (2) is used for clamping and conveying the cable to be stripped (1) to the cutter (3) at a constant speed. The cutter (3) comprises a plurality of H-shaped blades (3-1) and a plurality of second screws (3-2), the plurality of second screws (3-2) are uniformly arranged on the ring-shaped support (4) in the circumferential direction, one end of each of the plurality of second screws (3-2) penetrates the outer wall of the ring-shaped support (4), and the other end of each of the plurality of second screws (3-2) penetrates the inner wall of the ring-shaped support (4), and the plurality of second screws (3-2) and the ring-shaped support (4) are connected through threads; the plurality of H-shaped blades (3-1) and the plurality of second screws (3-2) are one-to-one corresponding, the H-shaped blade (3-1) is fixed at the end of the second screw (3-2) located on the inner wall, and the cutting edges of the H-shaped blades (3-1) all face the center direction.

2. A portable low voltage power cable stripping device according to claim 1, characterised in that, The clamping conveying mechanism (2) comprises a driving roller (2-1), a driven roller (2-2), a gearbox (2-3), a motor (2-4), two U-shaped frames (2-5), two first screws (2-6), a fixed shaft (2-7), two first handles (2-8) and an auxiliary box (2-9). One end of the driving roller (2-1) is connected to the side wall of the gearbox (2-3), and the other end of the driving roller (2-1) is connected to the side wall of the auxiliary box (2-9). The motor (2-4) is fixed to the side wall of the gearbox (2-3) opposite to the side wall connected to the driving roller (2-1), and the motor (2-4) can drive the driving roller (2-1) to rotate through the gearbox (2-3). The open ends of the two U-shaped frames (2-5) are respectively fixed to the top surfaces of the gearbox (2-3) and the auxiliary box (2-9). The two ends of the fixed shaft (2-7) are respectively provided with connecting holes; the bottom ends of the two first screws (2-6) are respectively inserted into the connecting holes at the two ends of the fixed shaft (2-7), and two limiting mechanisms (2-10) are arranged at the bottom end of each first screw (2-6), and the limiting mechanisms (2-10) are used for preventing the fixed shaft (2-7) from being separated from the first screw (2-6). The two first screws (2-6) are arranged on the top of the two U-shaped frames (2-5) in a threaded connection manner. The two first handles (2-8) are respectively fixed to the top ends of the two first screws (2-6). The driven roller (2-2) is arranged above the driving roller (2-1) in a shaft connection manner through the fixed shaft (2-7), and the central axis of the fixed shaft (2-7) coincides with the central axis of the driven roller (2-2), and the central axis of the driven roller (2-2) is parallel to the central axis of the driving roller (2-1).

3. A portable low voltage power cable stripping device according to claim 2, wherein, The middle part of the driving roller (2-1) is provided with an annular groove in the circumferential direction, and the same annular groove is formed on the driven roller (2-2) at the position opposite to the annular groove of the driving roller (2-1) in the circumferential direction of the driven roller (2-2).

4. A portable low voltage power cable stripping device according to claim 2 or 3, characterised in that, The surface of the driving roller (2-1) is coated with wear-resistant rubber.

5. A portable low voltage power cable stripping device according to claim 1, wherein, It further comprises a foldable triangular support (5). The leg length of the foldable tripod support frame (5) is adjustable, and a quick disassembly and assembly interface is arranged on the annular support (4) and is in butt joint with the top of the foldable tripod support frame (5).

6. A portable low voltage power cable stripping device according to claim 1, wherein, The plurality of H-shaped blades (3-1) of the cutter (3) are four pieces, the blade thickness of the H-shaped blade (3-1) is 2 mm, the blade edge wedge angle is 25°±2°, and the blade edge starting end of the H-shaped blade (3-1) is provided with a guide circular arc with a radius of 0.5 mm.

7. A portable low voltage power cable stripping device according to claim 1 or 6, wherein, The cutter (3) further comprises a second handle (3-3); The second handle (3-3) is fixed at one end of the second screw rod (3-2) located on the outer wall. The thread spacing of the second screw rod (3-2) is 0.1 mm / grade.

8. A portable low voltage power cable stripping device according to claim 7, wherein, The back of the H-shaped blade (3-1) is provided with a longitudinal chip removal groove, and the depth of the chip removal groove is 30%-40% of the blade thickness of the H-shaped blade (3-1).

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