阅读说明：本技术 一种铝套扩张工装及铝套扩张方法 (Aluminum sleeve expansion tool and aluminum sleeve expansion method ) 是由 李绍斌 彭勇 叶波 左格 戴杰 黄秦刚 于 2021-09-23 设计创作，主要内容包括：一种铝套扩张工装及铝套扩张方法,铝套扩张工装包括：机械式电缆矫直装置,包括用于套装电缆的矫直活动臂以及用于驱动矫直活动臂转动的驱动部件,矫直活动臂用于套装电缆；应力消除装置,用于均匀加热电缆并消除应力；预制装置,其具有锥形翻边部,用于对铝套进行翻边；扩张装置,其具有固定端、活动扩张端,固定端用于将扩张装置固定在电缆上,活动扩张端用于通过与固定端的反作用力对已经翻遍的铝套进行扩张；动力装置,用于给驱动部件以及活动扩张端提供驱动力。本发明可以减少人力的投入,降低工人的操作强度,减少因为完全人工操作导致铝套划伤的机率,还可以提高扩张压力,使得铝套扩张效果更好,便于后续进行铅封,提高铅封效果。(An aluminum sleeve expanding tool and an aluminum sleeve expanding method are provided, wherein the aluminum sleeve expanding tool comprises: the mechanical cable straightening device comprises a straightening movable arm for sleeving a cable and a driving part for driving the straightening movable arm to rotate, wherein the straightening movable arm is used for sleeving the cable; the stress relief device is used for uniformly heating the cable and relieving stress; the prefabricating device is provided with a conical flanging part and is used for flanging the aluminum sleeve; the expansion device is provided with a fixed end and a movable expansion end, the fixed end is used for fixing the expansion device on the cable, and the movable expansion end is used for expanding the turned aluminum sleeve through the reaction force with the fixed end; and the power device is used for providing driving force for the driving part and the movable expansion end. The invention can reduce the input of manpower, reduce the operation intensity of workers, reduce the probability of scratching the aluminum sleeve due to complete manual operation, improve the expansion pressure, ensure that the aluminum sleeve has better expansion effect, facilitate the subsequent lead sealing and improve the lead sealing effect.)

1. The utility model provides an aluminium cover expansion frock which characterized in that includes:

the mechanical cable straightening device (100) comprises a straightening movable arm (110) used for sleeving a cable (600) and a driving part (120) used for driving the straightening movable arm (110) to rotate, wherein the straightening movable arm (110) is used for sleeving the cable (600);

a strain relief device (200) for uniformly heating the cable (600) and relieving strain;

the prefabricating device (300) is provided with a conical flanging part and is used for flanging the aluminum sleeve;

an expansion means (400) having a fixed end for fixing the expansion means (400) on the cable (600), a movable expansion end for expanding the aluminum sheath that has been turned over by a reaction force with the fixed end;

a power device (500) for providing a driving force to the driving member (120) and the movable expansion end.

2. The aluminum sheath expanding tooling as recited in claim 1, characterized in that the straightening movable arm (110) comprises two straightening arms (111) and a synchronous hinge (112) for hinging the two straightening arms (111); one ends of the two straightening arms (111) far away from the synchronous hinge (112) are provided with protectors (113); the two protective devices (113) and the synchronous hinge (112) are used together for sheathing the cable (600).

3. The aluminum sleeve expanding tool according to claim 2, wherein the driving part (120) is a hydraulic oil cylinder, two ends of the hydraulic oil cylinder are respectively connected with the two straightening arms (111), and a first quick hydraulic connector (121) for connecting the power device (500) is arranged on the hydraulic oil cylinder.

4. The aluminum sheath expanding tool according to claim 1, wherein the power device (500) comprises a hydraulic pump (510), a hydraulic oil pipe (520), a second quick hydraulic joint (530) and a pressure gauge (540) for detecting outlet pressure of the hydraulic pump (510), and the hydraulic pump (510), the hydraulic oil pipe (520) and the second quick hydraulic joint (530) are sequentially connected.

5. The aluminum sheath expanding tooling of claim 4, wherein the stress relief device (200) comprises:

a plurality of straightening blocks (210) which are distributed on the surface of the cable (600);

a heating tape (220) for wrapping the cable (600) and the plurality of straightening blocks (210);

a temperature sensor (230) for detecting a surface temperature of the cable (600);

and the temperature control box (240) is respectively and electrically connected with the heating belt (220) and the temperature sensor (230).

6. The aluminum sheath expanding tool according to claim 5, wherein the stress relieving device (200) further comprises a heat preservation belt (250), and the heat preservation belt (250) wraps the outer surface of the heating belt (220).

7. The aluminum sleeve expanding tool according to claim 6, wherein the prefabricating device (300) is a Y-shaped flanging tool, and one tip of the Y-shaped flanging tool is of a conical structure.

8. The aluminum sheath expanding tooling of claim 1, wherein the expanding device (400) comprises:

a securing assembly (410) for securing the cable (600);

a plurality of guide bars (420), one end of each guide bar (420) being connected to the fixing assembly (410);

the annular fixing plate (430) is movably sleeved on the cable (600) and is positioned at one stripped side of the cable (600); the guide rods (420) penetrate through the annular fixing plate (430);

the annular conical head (440) is sleeved on the cable (600) and connected with the annular fixing plate (430), and the head of the annular conical head (440) faces the fixing component (410);

and the plurality of stretching components (450) are used for connecting a power device (500) and are respectively sleeved at the other ends of the plurality of guide rods (420).

9. The aluminum sheath expanding tool as claimed in claim 1, wherein the fixing assembly (410) comprises a plurality of fixing clips (411) and connecting bolts for connecting the fixing clips (411), and the fixing clips (411) are all used for locking the cable (600).

10. An aluminum sheath expanding method is characterized by comprising the following steps:

sleeving a mechanical cable straightening device (100) on a cable (600);

using the power device (500) to drive the mechanical cable straightening device (100) to straighten the cable (600);

heating the straightened cable (600) with a stress relief device (200) to relieve stress of the cable (600);

stripping an outer protection insulating layer (610) of the cable (600) to expose an aluminum sleeve of the cable (600);

flanging the aluminum sleeve by using a prefabricating device (300);

fixing the fixed end of the expansion device (400) on the side of the cable (600) where the outer protective insulating layer (610) is not stripped, and inserting the movable expansion end of the expansion device (400) into the flanged area of the aluminum sleeve;

driving the movable expansion end of the expansion means (400) towards the fixed end using the motive means (500).

Technical Field

The invention belongs to the field of high-voltage power transmission, and particularly relates to an aluminum sleeve expanding tool and an aluminum sleeve expanding method.

Background

The high-voltage cable metal sheath has the following main functions: the electric field is distributed uniformly, the electric potential is controlled, the electric field is limited, the partial discharge of the insulating surface is avoided, and the fault current and heat are conducted. At present, 80% of high-voltage cable metal sheaths in the market all adopt corrugated aluminum sleeves, and 1.5-5 mm air gaps exist between the corrugated aluminum sleeves and the water-blocking buffer layer in the cable. The operation failure research shows that the air gap is one of the main reasons of whitening, ablation and cable insulation breakdown of the water-blocking buffer layer. And the aluminium sheath of level and smooth aluminium cover cable combines closely with buffer layer, insulating shielding layer, and inside no air gap more is favorable to the heat dissipation, improves the current-carrying capacity. In recent years, related cable manufacturers have been greatly promoting the development of high-voltage smooth aluminum-sheathed cables.

The cable joint is an important accessory for connecting the tail end of a cable with electrical equipment such as an overhead line, a switch and the like, and in the installation construction of the cable joint, a joint tail pipe and a cable metal sleeve need to be welded by adopting lead sealing so as to ensure reliable connection and tightness. Lead welding temperature is generally above 300 ℃, and the continuous high temperature is unfavorable for smooth aluminum sheath cables, easily transmits heat to the inside of the cables, and causes insulation scald. Therefore, the joint construction of the smooth aluminum-sheathed high-voltage cable cannot adopt the same lead welding process as the corrugated aluminum sheath. The most direct and effective means is to enlarge the inner diameter of the aluminum sleeve, increase the distance between the aluminum sleeve and the buffer layer and between the aluminum sleeve and the insulating layer, and reduce or isolate the heat transfer to the inside of the cable. However, the conventional expansion device of the smooth aluminum sheath inner diameter on the market at present has the following problems: 1. the expansion pressure is too small, the expanded inner diameter of the aluminum sleeve is too small, the length is too short, the heat insulation effect is limited, and the insulation can still be scalded; 2. in the process of expanding the aluminum sleeve, the insulation shield is easily scratched or crushed, so that the aluminum sleeve is cracked and broken, the process requirements are not met, and the potential fault hazard exists; 3. when the existing expansion device is used for expanding the aluminum sleeve, the labor intensity is high, the operation time is long, the construction and installation cost is increased, and the aluminum sleeve is not beneficial to electrical power rush repair.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an aluminum sleeve expansion tool, which solves the problems that an expansion device is small in expansion pressure and high in operation strength and an aluminum sleeve is easy to damage. The invention also provides an aluminum sleeve expanding method.

According to the aluminium cover expansion frock of the embodiment of first aspect of this invention, include:

the mechanical cable straightening device comprises a straightening movable arm for sleeving a cable and a driving part for driving the straightening movable arm to rotate, wherein the straightening movable arm is used for sleeving the cable;

stress relief means for uniformly heating the cable and relieving stress;

the prefabricating device is provided with a conical flanging part and is used for flanging the aluminum sleeve;

the expansion device is provided with a fixed end and a movable expansion end, the fixed end is used for fixing the expansion device on the cable, and the movable expansion end is used for expanding the aluminum sleeve which is turned over by reacting force with the fixed end;

and the power device is used for providing driving force for the driving part and the movable expansion end.

The aluminum sleeve expanding tool provided by the embodiment of the invention at least has the following technical effects: the cable can be straightened before the aluminum sleeve needs to be expanded through the mechanical cable straightening device so as to ensure the subsequent expansion to be smooth and straight, prevent the cable from being scratched eccentrically and be beneficial to improving the lead sealing quality of a cable joint; the stress in the straightened cable can be eliminated through the stress eliminating device, and the cable is effectively prevented from rebounding; the aluminum sleeve can be pre-crimped through the prefabricating device, so that the subsequent expansion device can conveniently expand the aluminum sleeve; the mechanical cable straightening device and the expansion device can be driven to work through the power device, so that the use of force in the straightening and expansion processes is reduced, and the expansion pressure can be effectively improved. Compared with the traditional expansion device, the aluminum sleeve expansion tool provided by the embodiment of the invention can reduce the labor input, reduce the operation intensity of workers, reduce the probability of scratching the aluminum sleeve due to complete manual operation, and improve the expansion pressure, so that the aluminum sleeve expansion effect is better, the subsequent lead sealing is convenient, and the lead sealing effect is improved.

According to some embodiments of the invention, the straightening movable arm comprises two straightening arms and a synchronous hinge for hinging the two straightening arms; one ends of the two straightening arms far away from the synchronous hinge are provided with protective tools; two the protective equipment with synchronous hinge is used for suit jointly the cable.

According to some embodiments of the invention, the driving part adopts a hydraulic oil cylinder, two ends of the hydraulic oil cylinder are respectively connected with the two straightening arms, and a first quick hydraulic joint for connecting the power device is arranged on the hydraulic oil cylinder.

According to some embodiments of the invention, the power device comprises a hydraulic pump, a hydraulic oil pipe, a second quick hydraulic joint and a pressure gauge for detecting the outlet pressure of the hydraulic pump, and the hydraulic pump, the hydraulic oil pipe and the second quick hydraulic joint are connected in sequence.

According to some embodiments of the invention, the strain relief device comprises:

the straightening blocks are distributed on the surface of the cable;

the heating belt is used for wrapping the cable and the straightening blocks;

a temperature sensor for detecting a surface temperature of the cable;

and the temperature control box is respectively and electrically connected with the heating belt and the temperature sensor.

According to some embodiments of the invention, the strain relief device further comprises a thermal insulation tape wrapped around an outer surface of the heating tape.

According to some embodiments of the invention, the pre-device is a Y-flanging tool having a tapered configuration at one tip.

According to some embodiments of the invention, the expansion device comprises:

a fixing assembly for locking the cable;

one end of each guide bar is connected with the fixing component;

the annular fixing plate is movably sleeved on the cable and is positioned on one stripped side of the cable; the guide rods penetrate through the annular fixing plate;

the annular conical head is sleeved on the cable and connected with the annular fixing plate, and the head of the annular conical head faces the fixing component;

and the plurality of stretching components are used for connecting the power device and are respectively sleeved at the other ends of the plurality of guide rods.

According to some embodiments of the invention, the fixing assembly comprises a plurality of fixing clips for locking the cable and a connecting bolt for connecting the plurality of fixing clips.

The aluminum sheath expanding method according to the embodiment of the second aspect of the invention comprises the following steps:

sleeving a mechanical cable straightening device on a cable;

driving the mechanical cable straightening device to straighten the cable by using the power device;

heating the straightened cable by using a stress relief device to relieve the stress of the cable;

stripping an outer protection insulating layer of the cable to expose an aluminum sheath of the cable;

flanging the aluminum sleeve by using a prefabricated device;

fixing the fixed end of the expansion device on the side of the cable, which is not stripped from the outer protective insulating layer, and inserting the movable expansion end of the expansion device into the flanged area of the aluminum sleeve;

driving the movable expansion end of the expansion device towards the fixed end using the motive device.

The aluminum sleeve expanding method provided by the embodiment of the invention at least has the following technical effects: the cable can be straightened before the aluminum sleeve needs to be expanded through the mechanical cable straightening device so as to ensure the subsequent expansion to be smooth and straight, prevent the cable from being scratched eccentrically and be beneficial to improving the lead sealing quality of a cable joint; the stress in the straightened cable can be eliminated through the stress eliminating device, and the cable is effectively prevented from rebounding; the aluminum sleeve can be pre-crimped through the prefabricating device, so that the subsequent expansion device can conveniently expand the aluminum sleeve; the mechanical cable straightening device and the expansion device can be driven to work through the power device, so that the use of force in the straightening and expansion processes is reduced, and the expansion pressure can be effectively improved. Compared with the traditional expansion device, the aluminum sleeve expansion method provided by the embodiment of the invention can reduce the labor input, reduce the operation intensity of workers, reduce the probability of scratching the aluminum sleeve due to complete manual operation, and improve the expansion pressure, so that the aluminum sleeve expansion effect is better, the subsequent lead sealing is convenient, and the lead sealing effect is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of the mechanical cable straightener of an embodiment of the present invention;

FIG. 2 is a schematic structural view of a synchronous hinge according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a brace according to an embodiment of the present invention;

FIG. 4 is a schematic view of the power plant of an embodiment of the present invention (manual hydraulic pump);

FIG. 5 is a schematic view of a hydraulic pump (electrically driven hydraulic pump) according to an embodiment of the present invention;

FIG. 6 is a simplified structural diagram of a stress relief device according to an embodiment of the present invention;

FIG. 7 is a schematic view of the construction of a prefabrication apparatus according to an embodiment of the invention;

FIG. 8 is a schematic view of the stent of an embodiment of the present invention.

Reference numerals:

mechanical cable straightening device 100, straightening movable arm 110, straightening arm 111, synchronous hinge 112, protector 113, drive unit 120, and first quick hydraulic joint 121

Stress relief device 200, straightening block 210, heating belt 220, temperature sensor 230, temperature control box 240, heat preservation belt 250,

A prefabricating device 300,

The expanding device 400, the fixing component 410, the fixing clamp 411, the guide rod 420, the annular fixing plate 430, the annular conical head 440, the stretching component 450,

A power device 500, a hydraulic pump 510, a hydraulic oil pipe 520, a second quick hydraulic joint 530, a pressure gauge 540,

Cable 600, outer protective insulation 610, insulating shield 620.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the directional descriptions, such as the directions of upper, lower, front, rear, left, right, etc., are referred to only for convenience of describing the present invention and for simplicity of description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

An aluminum sheath expanding tool according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 to 8.

The aluminum sheath expanding tool comprises a mechanical cable straightening device 100, a stress relieving device 200, a prefabricating device 300, an expanding device 400 and a power device 500.

The mechanical cable straightening device 100 comprises a straightening movable arm 110 used for sleeving a cable 600 and a driving part 120 used for driving the straightening movable arm 110 to rotate, wherein the straightening movable arm 110 is used for sleeving the cable 600;

a stress relief means 200 for uniformly heating the cable 600 and relieving stress;

the prefabricating device 300 is provided with a conical flanging part and is used for flanging the aluminum sleeve;

an expansion means 400 having a fixed end for fixing the expansion means 400 to the cable 600, and a movable expansion end for expanding the aluminum sheath that has been turned over by a reaction force with the fixed end;

and a power device 500 for providing a driving force to the driving part 120 and the movable expansion end.

Referring to fig. 1 to 8, straightening arm 110 may enclose cable 600, and after enclosing, cable 600 may follow rotation of straightening arm 110. However, since the diameter of the part of the cable 600 is large, if the straightening arm 110 is directly rotated by the manual force, on the one hand, the working strength of the worker is easily increased, and on the other hand, there may be a case where the straightening arm 110 cannot be rotated. Here, a driving part 120 is disposed between the two arms of the straightening movable arm 110, the driving part 120 is detachably connected to the power device 500, and the driving part 120 can perform a telescopic motion under the driving of the power device 500, so as to drive the straightening movable arm 110 to rotate.

After the straightening movable arm 110 straightens the cable 600, the cable 600 has a large stress, and if the stress is not timely removed, the straightness and stability of the cable 600 are affected. At this point, the strain relief device 200 may be utilized to relieve the strain on the cable 600. The stress relief device 200 is mainly used for relieving the internal stress of the cable 600 by heating, and the heating temperature needs to be kept low, so that the cable 600 is not damaged due to high temperature while the stress is relieved.

After the stress of the cable 600 is removed, the cable 600 needs to be peeled off, the outer protective insulation layer 610 of the cable 600 is removed, and the inner aluminum sheath leaks out. After the aluminum sleeve leaks, the edge of the aluminum sleeve can be flanged by utilizing the conical flanging part of the expansion device 400, the length of the flanging is not required to be too large, and only the movable expansion end of the expansion device 400 can enter.

After the flanging of the aluminum sleeve, the aluminum sleeve is further expanded by using the expansion device 400, so that the gap between the aluminum sleeve and the cable 600 inner core is effectively increased. Here, fix the stiff end of expansion device 400 first on the side of cable 600 that is not skinned, then stretch into the activity expansion end in the turn-ups aluminium cover, then can let expansion device 400 utilize reaction force work for the activity expansion end is continuous to the antedisplacement of stiff end place side, and the aluminium cover in the antedisplacement route can be continuously expanded to the in-process activity expansion end of antedisplacement, and the aluminium cover length that needs the expansion satisfies follow-up cable joint connection demand and accomplishes the expansion promptly.

According to the aluminum sheath expansion tool provided by the embodiment of the invention, the mechanical cable straightening device 100 can straighten the cable 600 before the aluminum sheath expansion is needed, so that the subsequent expansion is ensured to be smooth and straight, the cable 600 is prevented from being scratched eccentrically, and the lead sealing quality of a cable joint is improved; the stress in the straightened cable 600 can be eliminated by the stress relieving device 200, and the resilience of the cable 600 is effectively prevented; the aluminum sleeve can be pre-crimped by the prefabricating device 300, so that the subsequent expansion device 400 can be conveniently used for expanding the aluminum sleeve; the power device 500 can drive the mechanical cable straightening device 100 and the expansion device 400 to work, so that the force needed in the straightening and expansion processes is reduced, and the expansion pressure can be effectively increased. Compared with the traditional expansion device 400, the aluminum sleeve expansion tool provided by the embodiment of the invention can reduce the labor input, reduce the operation intensity of workers, reduce the probability of scratching the aluminum sleeve due to complete manual operation, and improve the expansion pressure, so that the aluminum sleeve expansion effect is better, the subsequent lead sealing is facilitated, and the lead sealing effect is improved.

In some embodiments of the invention, with reference to fig. 1 to 3, the straightening moving arm 110 comprises two straightening arms 111 and a synchronous hinge 112 for hinging the two straightening arms 111; one ends of the two straightening arms 111 far away from the synchronous hinge 112 are both provided with a protector 113; two protectors 113 are used in conjunction with the synchronizing hinge 112 to encase the cable 600. The two straightening arms 111 rotate around the synchronous hinge 112, and the cable 600 can be sleeved in a three-point sleeved structure formed by the two protectors 113 and the synchronous hinge 112, so that the two straightening arms 111 can straighten the sleeved cable 600 when rotating around the synchronous hinge 112. Meanwhile, the use of the protector 113 can make the cable 600 more stable when straightened, and can also avoid the damage of the straightening arm 111 to the cable 600. In some embodiments of the invention, cable 600 protector 113 is a semi-circular arc shaped structure that matches the outer diameter of cable 600 and conforms to the surface of cable 600 to ensure that cable 600 is not damaged during the straightening process. The synchronous hinge 112 adopts a gear meshing structure, so that the synchronous performance of the movement of the left straightening arm 111 and the right straightening arm 111 is ensured.

In some embodiments of the invention, referring to fig. 1, the driving part 120 is a hydraulic cylinder, and two ends of the hydraulic cylinder are respectively connected with the two straightening arms 111, and the hydraulic cylinder is provided with a first quick hydraulic joint 121 for connecting the power device 500. The hydraulic ram may provide a greater driving force and thus may provide greater rotational power to the straightening arm 111 so that the straightening arm 111 may straighten a cable 600 having a thicker diameter. When the driving member 120 is a hydraulic cylinder, the corresponding power unit 500 is a hydraulic driving unit. A quick coupling is provided on the hydraulic ram through which a quick connection to the hydraulic drive can be made to provide power to the drive member 120.

In some embodiments of the invention, referring to fig. 4 and 5, the power plant 500 comprises a hydraulic pump 510, a hydraulic oil pipe 520, a second fast hydraulic joint 530 and a pressure gauge 540 for detecting the outlet pressure of the hydraulic pump 510, wherein the hydraulic pump 510, the hydraulic oil pipe 520 and the second fast hydraulic joint 530 are connected in sequence. The hydraulic pump 510 can be a manual hydraulic pump 510 or an electric hydraulic pump 510, and the hydraulic pipe 520 connects the second quick hydraulic joint 530 and the hydraulic pressure. After the second quick hydraulic joint 530 is connected to the first quick hydraulic joint, the hydraulic pump 510 can be used to control the driving member 120 to move in a telescopic manner. The pressure gauge 540 is arranged in the hydraulic oil pipe 520 or at the outlet of the hydraulic pump 510, so that the oil pressure can be monitored, and the current straightening pressure can be intuitively known.

The mechanical straightening process for the cable 600 is further described herein with reference to fig. 1-3.

The straightening movable arm 110 is first spread and sleeved on the bent cable 600, so that the protective tool 113 is clamped at two ends of the deformed part of the cable 600. The hydraulic oil cylinder is in quick connection with the manual hydraulic pump 510 or the electric hydraulic pump 510 through a hydraulic oil pipe 520 and a second quick-change connector. After the hydraulic pump 510 is started, the straightening movable arm 110 is driven by the hydraulic cylinder to slowly stretch out the stretching arm, and under the action of the movement, the bent part of the cable 600 is uniformly clamped and corrected under the combined action of the protective clothing 113 of the cable 600 and the synchronous hinge 112.

In some embodiments of the invention, referring to fig. 6, a stress relief device 200 comprises: heating belt 220, temperature sensor 230, temperature control box 240, and a plurality of straightening blocks 210. A plurality of straightening blocks 210 distributed on the surface of the cable 600; a heating tape 220 for wrapping the cable 600 and the plurality of straightening blocks 210; a temperature sensor 230 for detecting a surface temperature of the cable 600; the temperature control box 240 is electrically connected to the heating belt 220 and the temperature sensor 230, respectively.

The plurality of straightening blocks 210 are arranged on the surface of the cable 600, the heating tape 220 is wrapped on the surface of the cable 600, the straightening blocks 210 are wrapped in the cable, and the heating tape 220 is wrapped on the surface of the cable 600, so that the cable 600 can be uniformly heated, and stress is effectively eliminated. The temperature sensor 230 may be a thermocouple, and when the heating tape 220 is wrapped, the thermocouple is also wrapped on the inner side of the heating tape 220, so that the temperature of the surface of the cable 600 can be accurately detected. The temperature control box 240 is internally provided with a temperature controller and a display unit, the temperature display unit can display the temperature detected by the current thermocouple, and meanwhile, the temperature controller can be assisted to adjust the preset heating temperature. The temperature controller is electrically connected to the heating belt 220, and can control the heating power of the heating belt 220. The temperature controller can directly adopt a temperature control switch, can also adopt a combined structure of a controller and a key, and the controller can adopt a single chip microcomputer or an ARM, and can specifically use an stm32 series controller. The temperature control box 240 has a power module built therein for supplying power to the heating belt 220.

In some embodiments of the invention, referring to fig. 6, the strain relief device 200 further comprises a thermal insulation tape 250, wherein the thermal insulation tape 250 wraps around the outer surface of the heating tape 220. The heating efficiency of the heating belt 220 can be enhanced by the heat-insulating belt 250, and the rapid loss of heat can be prevented.

The stress relief process for straightened cable 600 is further described herein with reference to fig. 6.

Firstly, a plurality of correction blocks are distributed and fixed on the surface of the cable 600, then the heating tape 220 is wrapped on the surfaces of the correction blocks and the cable 600, the correction blocks and the surface of the cable 600 are wrapped and sealed by the heat preservation tape 250, the thermocouple is placed on the inner side of the heating tape 220 and is attached to the surface of the cable 600, the heating power is set on the temperature control box 240, the power output to the heating tape 220 is started, and the heating tape 220 starts to heat the cable 600. Specifically, the cable 600 is heated at a constant temperature of 70 ℃ for 3 hours, so that the internal stress inside the cable 600 can be effectively eliminated, the straightened cable 600 is kept flat enough, and the subsequent aluminum sheath expansion is facilitated.

In some embodiments of the invention, referring to FIG. 7, the pre-forming device 300 is a Y-flanging tool having a tapered configuration at one tip. During the tip of Y type turn-ups instrument toper structure can be fine inserts the aluminium cover clearance, another most advanced length is longer, can regard as the fulcrum to use, and supplementary toper structure's tip carries out the turn-ups, and simultaneously, the longer most advanced of length adopts the button head design, can effectively avoid the turn-ups in-process to damage cable 600.

In some embodiments of the invention, referring to fig. 8, a dilation device 400 comprises: the fixing assembly 410, a plurality of guide bars 420, an annular fixing plate 430, an annular conical head 440, a plurality of tension members 450. A fixing member 410 for locking the cable 600; a plurality of guide bars 420, one end of each guide bar 420 being connected to the fixing member 410; the annular fixing plate 430 is movably sleeved on the cable 600 and is positioned at the stripped side of the cable 600; a plurality of guide rods 420 are all arranged through the annular fixing plate 430; an annular conical head 440 sleeved on the cable 600 and connected with the annular fixing plate 430, wherein the head of the annular conical head 440 faces the fixing assembly 410; the plurality of tension members 450 for connecting the power unit 500 are respectively fitted to the other ends of the plurality of guide bars 420.

The fixing member 410 is fixed on the surface of the intact side of the cable 600, and a rubber cushion is disposed between the fixing member 410 and the surface of the cable 600 to prevent the fixing member 410 from damaging the cable 600 during clamping the cable 600 and subsequent expansion. The plurality of guide bars 420 are distributed around the cable 600 and have one end connected to the fixing member 410. The annular fixing plate 430 is fitted around the cable 600 to be movable in a diameter direction of the cable 600. An annular conical head 440 is arranged at the front end of the annular fixing plate 430, and the annular conical head 440 is also sleeved on the cable 600 and can move along the diameter direction of the cable 600. The annular fixing plate 430 is provided with a plurality of through holes at positions corresponding to positions of the fixing members 410 to which the guide rods are coupled, so that the guide rods can be disposed through the annular fixing plate 430. After the guide bar passes through the ring-shaped fixing plate 430, the stretching part 450 is sleeved on the guide bar, and a limiting part is provided at the tail of the guide bar to prevent the stretching part 450 from being separated from the guide bar. When the stretching part 450 is stretched, the stretching part cannot move backwards due to the existence of the limiting part, so that the annular fixing plate 430 is pushed reversely to move towards the fixing part, and the annular fixing plate 430 further pushes the annular conical head 440 to move, thereby expanding the aluminum sleeve. It should be noted that the angle of the annular cone 440 should be less than 30 degrees to reduce the expansion force. The annular conical head 440 and the annular fixing plate 430 are connected through threads, and the annular conical head 440 is replaced.

In some embodiments of the invention, referring to fig. 8, the fixing assembly 410 includes a plurality of fixing clips 411 and a connecting bolt for connecting the plurality of fixing clips 411, and the plurality of fixing clips 411 are all used for locking the cable 600. The fixing clip 411 can be quickly locked on the cable 600, and a through hole is formed on the side surface of the fixing clip, and a plurality of adjacent fixing clips can be effectively connected through the through hole by using a bolt. The contact force between the fixing clips 411 and the surface of the cable 600 can be effectively improved by using the fixing clips, so that the expansion can be more stable in the follow-up process.

In some embodiments of the invention, the guide rod 420 may be a screw, one end of the screw passes through a through hole on the side surface of the fixing clip 411, and then is limited by a bolt, and the other end of the screw passes through the annular fixing plate 430 and the stretching member 450 in sequence, and then is limited by a bolt.

In some embodiments of the invention, referring to fig. 8, the tension member 450 may employ a hydraulic bolt tensioner or a hydraulic ram. The ring-shaped fixing plate 430 can be driven to move by a hydraulic bolt tensioner or a hydraulic oil cylinder. The hydraulic bolt tensioner or the hydraulic oil cylinder is provided with a third quick hydraulic joint, and the third quick hydraulic joint can be quickly connected with the power device 500. There are a plurality of tension members 450 and thus a plurality of third quick hydraulic couplings, so that when it is necessary to drive the push ring fixing plate 430, a plurality of hydraulic bolt tensioners or hydraulic cylinders are simultaneously driven. Here, a branch oil pipe is connected to an output side of the second quick hydraulic joint 530 of the power plant 500, and each hydraulic bolt tensioner or hydraulic cylinder is driven by a plurality of branch oil pipes, and meanwhile, in order to synchronously control a plurality of hydraulic bolt tensioners or hydraulic cylinders, a pressure dividing valve or a flow control valve is provided on each branch oil pipe to control the amount of hydraulic oil.

Referring now to fig. 8, the aluminum sheath expansion process of cable 600 after the aluminum sheath flanging is further described.

A plurality of fixing clips 411 are sleeved on the surface of the cable 600, are locked by bolts to form holding force, and are connected by bolts to form a whole, so that the holding force and the stabilizing force are increased. The attaching surface of the fixing clip 411 and the cable 600 is provided with a rubber cushion layer to protect the cable 600. The annular conical head 440 is sleeved into the cable 600 from the end part of the aluminum sleeve of the cable 600 until the conical head extends into the inner side of the flanging aluminum sleeve, the fixing clamp 411 and the annular fixing plate 430 are connected by adopting a plurality of screws, a hydraulic bolt stretcher or a hydraulic oil cylinder is sleeved at the tail part of the screw on one side of the fixing plate, a branch oil pipe and a third quick-change hydraulic joint are adopted between the hydraulic bolt stretcher or the hydraulic oil cylinder and the power device 500 to realize quick connection, and a pressure distributing valve or a flow control valve is adopted to control the pressure of the branch oil pipe. The power device 500 is started to drive the hydraulic bolt stretcher or the hydraulic oil cylinder to work, the annular conical head 440 is pressed into the aluminum sleeve by using the reaction force, and the aluminum sleeve expands and swells outwards under the guidance of the annular conical head 440 until the aluminum sleeve expands to the required size. The monitoring of the power device 500 is realized by observing the pressure display of the hydraulic gauge in the expansion process, so that the expansion pressure is ensured to be balanced and not to exceed the tensile strength born by the aluminum sleeve.

According to the aluminum sheath expanding method of the embodiment of the second aspect of the present invention, the aluminum sheath expanding device 400 of the embodiment of the first aspect of the present invention is applied, and the method comprises the following steps:

sleeving the mechanical cable straightening device 100 on the cable 600;

the power device 500 is used for driving the mechanical cable straightening device 100 to straighten the cable 600;

heating the straightened cable 600 with the stress relief device 200 to relieve stress in the cable 600;

stripping an outer protective insulating layer 610 of the cable 600 to expose an aluminum sheath of the cable 600;

flanging the aluminum sleeve by using a prefabricating device 300;

fixing the fixed end of the expansion device 400 on the side of the cable 600 where the outer protective insulating layer 610 is not stripped, and inserting the movable expansion end of the expansion device 400 into the flanged area of the aluminum sheath;

the motive device 500 is used to drive the movable, dilating end of the dilating device 400 towards the fixed end.

Referring to fig. 1 to 5, the mechanical cable straightener 100 may be sleeved with a cable 600, and after the sleeving is completed, the power device 500 drives the mechanical cable straightener 100 to rotate. With the rotation of the mechanical cable straightening device 100, the cable 600 will follow the rotation to achieve mechanical straightening.

After the mechanical cable straightener 100 straightens the cable 600, the cable 600 may have significant stress that if not removed in time, may affect the straightness and stability of the cable 600. At this point, the strain relief device 200 may be utilized to relieve the strain on the cable 600. The stress relief device 200 is mainly used for relieving the internal stress of the cable 600 by heating, and the heating temperature is kept low for a long time, so that the cable 600 is not damaged due to high temperature while the stress is relieved.

After the stress of the cable 600 is removed, the cable 600 needs to be peeled off, the outer protective insulation layer 610 of the cable 600 is removed, and the inner aluminum sheath leaks out. After the aluminum sleeve leaks, the edge of the aluminum sleeve can be flanged by utilizing the conical flanging part of the expansion device 400, the length of the flanging is not required to be too large, and only the movable expansion end of the expansion device 400 can enter.

After the flanging of the aluminum sleeve, the aluminum sleeve is further expanded by using the expansion device 400, so that the gap between the aluminum sleeve and the cable 600 inner core is effectively increased. Here, fix the stiff end of expansion device 400 first on the side of cable 600 that is not skinned, then stretch into the activity expansion end in the turn-ups aluminium cover, then can let expansion device 400 utilize reaction force work for the activity expansion end is continuous to the antedisplacement of stiff end place side, and the aluminium cover in the antedisplacement route can be continuously expanded to the in-process activity expansion end of antedisplacement, and the aluminium cover length that needs the expansion satisfies follow-up cable joint connection demand and accomplishes the expansion promptly.

According to the aluminum sheath expanding method provided by the embodiment of the invention, the mechanical cable straightening device 100 can straighten the cable 600 before the aluminum sheath is expanded, so that subsequent expansion is ensured to be smooth and straight, the cable 600 is prevented from being scratched eccentrically, and the lead sealing quality of a cable joint is improved; the stress in the straightened cable 600 can be eliminated by the stress relieving device 200, and the resilience of the cable 600 is effectively prevented; the aluminum sleeve can be pre-crimped by the prefabricating device 300, so that the subsequent expansion device 400 can be conveniently used for expanding the aluminum sleeve; the power device 500 can drive the mechanical cable straightening device 100 and the expansion device 400 to work, so that the force needed in the straightening and expansion processes is reduced, and the expansion pressure can be effectively increased. Compared with the traditional expansion device 400, the aluminum sleeve expansion method provided by the embodiment of the invention can reduce the labor input, reduce the operation intensity of workers, reduce the probability of scratching the aluminum sleeve due to complete manual operation, and improve the expansion pressure, so that the aluminum sleeve expansion effect is better, the subsequent lead sealing is convenient, and the lead sealing effect is improved.

The aluminum sheath expanding method according to the embodiment of the present invention will be specifically described based on the specific structure of the aluminum sheath expanding device 400 according to the embodiment of the first aspect of the present invention.

Mechanical straightening: the straightening movable arm 110 is first spread and sleeved on the bent cable 600, so that the protective tool 113 is clamped at two ends of the deformed part of the cable 600. The hydraulic oil cylinder is in quick connection with the manual hydraulic pump 510 or the electric hydraulic pump 510 through a hydraulic oil pipe 520 and a second quick-change connector. After the hydraulic pump 510 is started, the straightening movable arm 110 is driven by the hydraulic cylinder to slowly stretch out the stretching arm, and under the action of the movement, the bent part of the cable 600 is uniformly clamped and corrected under the combined action of the protective clothing 113 of the cable 600 and the synchronous hinge 112.

And (3) stress relief: firstly, a plurality of correction blocks are distributed and fixed on the surface of the cable 600, then the heating tape 220 is wrapped on the surfaces of the correction blocks and the cable 600, the correction blocks and the surface of the cable 600 are wrapped and sealed by the heat preservation tape 250, the thermocouple is placed on the inner side of the heating tape 220 and is attached to the surface of the cable 600, the heating power is set on the temperature control box 240, the power output to the heating tape 220 is started, and the heating tape 220 starts to heat the cable 600. Specifically, the cable 600 is heated at a constant temperature of 70 ℃ for 3 hours, so that the internal stress inside the cable 600 can be effectively eliminated, the straightened cable 600 is kept flat enough, and the subsequent aluminum sheath expansion is facilitated.

Flanging the aluminum sleeve: the tip of the conical structure of the Y-shaped flanging tool is inserted into the gap of the aluminum sleeve, the other tip is longer in length and used as a fulcrum, and the tip of the conical structure is utilized to flange the aluminum sleeve.

Expanding the aluminum sleeve: a plurality of fixing clips 411 are sleeved on the surface of the cable 600, are locked by bolts to form holding force, and are connected by bolts to form a whole, so that the holding force and the stabilizing force are increased. The attaching surface of the fixing clip 411 and the cable 600 is provided with a rubber cushion layer to protect the cable 600. The annular conical head 440 is sleeved into the cable 600 from the end part of the aluminum sleeve of the cable 600 until the conical head extends into the inner side of the flanging aluminum sleeve, the fixing clamp 411 and the annular fixing plate 430 are connected by adopting a plurality of screws, a hydraulic bolt stretcher or a hydraulic oil cylinder is sleeved at the tail part of the screw on one side of the fixing plate, a branch oil pipe and a third quick-change hydraulic joint are adopted between the hydraulic bolt stretcher or the hydraulic oil cylinder and the power device 500 to realize quick connection, and a pressure distributing valve or a flow control valve is adopted to control the pressure of the branch oil pipe. The power device 500 is started to drive the hydraulic bolt stretcher or the hydraulic oil cylinder to work, the annular conical head 440 is pressed into the aluminum sleeve by using the reaction force, and the aluminum sleeve expands and swells outwards under the guidance of the annular conical head 440 until the aluminum sleeve expands to the required size. The monitoring of the power device 500 is realized by observing the pressure display of the hydraulic gauge in the expansion process, so that the expansion pressure is ensured to be balanced and not to exceed the tensile strength born by the aluminum sleeve. It should be noted that the angle of the annular cone 440 should be less than 30 degrees to reduce the expansion force. In addition, when the annular cone 440 is used to expand the aluminum sleeve, friction between the annular cone 440 and the aluminum sleeve or the insulation shielding layer 620 may be reduced by applying a lubricant or grease.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the embodiments, and those skilled in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.