Aluminum sheath expansion shaping tool and aluminum sheath expansion method

Abstract

The invention relates to the technical field of high-voltage cable accessories, and discloses an aluminum sheath expanding and shaping tool and an aluminum sheath expanding method.The aluminum sheath expanding and shaping tool comprises a fixing assembly, a pre-flanging tool, a shaping assembly and an expanding assembly; the shaping assembly comprises a shaping piece, and the shaping piece is provided with a shaping taper hole. The expansion assembly comprises an expansion taper pipe, and the expansion taper pipe is provided with a first end and a second end which are opposite; wherein the diameter of the expansion taper pipe is gradually reduced in the direction from the second end to the first end, the aperture of the shaping taper hole is gradually reduced in the direction from the second end to the first end, and a forming cavity is formed between the hole wall of the shaping taper hole and the outer wall of the expansion taper pipe; according to the aluminum sheath expanding and shaping tool, through the shaping taper hole and the expanding taper pipe, the expanded aluminum sheath can be pressed and shaped, the expanded aluminum sheath is limited in the forming cavity, and the surface quality of a horn mouth of the expanded aluminum sheath and the concentricity between the horn mouth and a cable are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-voltage cable accessories, in particular to an aluminum sheath expansion shaping tool and an aluminum sheath expansion method. BACKGROUND

[0002] Smooth aluminum sheath power cables are widely used in modern urban underground power engineering due to their small outer diameter, light weight, and convenient laying. The tight contact between the smooth aluminum sheath and the semi-conductive buffer layer of such cables makes the electric field distribution more uniform, effectively prevents the electric corrosion of the insulation shielding layer, and improves the safety and life of the cable operation.

[0003] During the installation of cable accessories, the tight combination of the aluminum sheath and the insulation shielding layer makes it easy to conduct heat to the insulation layer during high-temperature operations such as lead sealing and tin lining, causing damage. Therefore, the end of the aluminum sheath is usually expanded into a flared shape to increase the distance between it and the insulation shielding layer, avoiding construction heat damage.

[0004] The existing aluminum sheath expansion device has the following problems in use: uneven stress during expansion, which can easily cause the flared mouth to crack or scratch the cable insulation layer; poor expansion forming quality, with poor concentricity, uneven edges, and inconsistent taper, affecting the welding quality of the subsequent transition aluminum pipe. SUMMARY

[0005] To solve at least one of the technical problems existing in the prior art, the present application aims to provide an aluminum sheath expansion shaping tool and an aluminum sheath expansion method using the tool. The aluminum sheath expansion shaping tool can improve the surface quality of the flared mouth after expansion and the concentricity between the flared mouth and the cable.

[0006] In order to achieve the above object, in a first aspect, the present application provides an aluminum sheath expanding and shaping tool applied to a cable, the cable comprising a non-stripped section and a stripped section connected in sequence; characterized in that the aluminum sheath expanding and shaping tool comprises a fixing assembly, a pre-flanging tool, a shaping assembly and an expanding assembly; the fixing assembly is used for fixing to the non-stripped section of the cable; the pre-flanging tool is used for flanging the aluminum sheath of the stripped section; the shaping assembly comprises a shaping piece, one end of the shaping piece being fixedly connected to the fixing assembly, the shaping piece having a shaping taper hole suitable for the stripped section to pass through; the expanding assembly comprises an expanding taper pipe, the expanding taper pipe having opposite first and second ends, the first end being arranged in the shaping taper hole and being used for inserting into the inner side of the aluminum sheath which has been flanged, the second end being located on the side of the shaping piece away from the fixing assembly; wherein the diameter of the expanding taper pipe gradually decreases along the direction from the second end to the first end, the hole diameter of the shaping taper hole gradually decreases along the direction from the second end to the first end, and a forming cavity is formed between the hole wall of the shaping taper hole and the outer wall of the expanding taper pipe.

[0007] In some embodiments, the shaping piece comprises a first shaping clamp, a second shaping clamp and a connecting bolt, the first shaping clamp and the second shaping clamp being fixedly connected together by the connecting bolt and forming the shaping taper hole.

[0008] In some embodiments, the first shaping clamp is provided with a limiting recess, and the second shaping clamp is provided with a limiting protrusion embedded in the limiting recess.

[0009] In some embodiments, the aluminum sheath expanding and shaping tool further comprises a protective adhesive tape; a protective through hole is further formed between the first shaping clamp and the second shaping clamp, the protective through hole being connected in communication with one end of the shaping taper hole away from the expanding assembly and being suitable for the stripped section to pass through; and the protective adhesive tape is wound on the outer surface of the aluminum sheath of the stripped section and located in the protective through hole.

[0010] In some embodiments, the shaping assembly further comprises a first annular plate fixedly connected to the outer wall of the shaping member, the shaping taper hole has a first central axis, and the first annular plate is provided with a plurality of first connecting holes arranged around the first central axis; the expanding assembly further comprises a second annular plate, a plurality of expansion bolts, and a plurality of expansion nuts, the second annular plate is fixedly connected to the outer wall of the second end and is arranged in a spaced manner with the first annular plate, the expanding taper pipe has a second central axis, the second central axis and the first central axis are collinear, the second annular plate is provided with a plurality of second connecting holes arranged around the second central axis, and the expansion nuts are threadedly connected with the expansion bolts and located on the side of the second annular plate away from the first annular plate; the plurality of first connecting holes, the plurality of second connecting holes, the plurality of expansion bolts, and the plurality of expansion nuts are arranged in a one-to-one correspondence.

[0011] In some embodiments, the aluminum sheath expanding and shaping tool further comprises a distance measuring assembly, the distance measuring assembly comprises a plurality of laser distance measuring sensors and a plurality of reflecting plates, the laser distance measuring sensors are connected to the first annular plate, the plurality of laser distance measuring sensors are arranged around the first central axis, and the reflecting plates are connected to the second annular plate; the plurality of reflecting plates and the plurality of laser distance measuring sensors are arranged in a one-to-one correspondence.

[0012] In some embodiments, the shaping assembly is detachably connected to the fixing assembly through fastening bolts, the number of fastening bolts is a plurality, and the plurality of fastening bolts are arranged around the first central axis.

[0013] In some embodiments, the fixing assembly comprises a first fixing clamp, a second fixing clamp, and a fixing bolt, the first fixing clamp and the second fixing clamp are fixedly connected together through the fixing bolt and are formed with a clamping through hole suitable for clamping and fixing the non-stripped section.

[0014] In some embodiments, a rubber pad layer is arranged between the hole wall of the clamping through hole and the surface of the non-stripped section.

[0015] In a second aspect, the present application also provides an aluminum sheath expanding method, the aluminum sheath expanding method applies the aluminum sheath expanding and shaping tool according to any one of the above, and comprises the following steps:

[0016] Step one: stripping the outer sheath of the cable to divide the cable into a stripped section and a non-stripped section, and exposing the aluminum sheath of the cable from the stripped section;

[0017] Step two: using a pre-flanging tool to flange the aluminum sheath of the stripped section;

[0018] Step three: clamping and fixing the fixing assembly on the non-stripped section of the cable;

[0019] Step four: clamp and fix the shaping assembly on the stripped section of the cable, and fix the shaping assembly and the fixing assembly;

[0020] Step five: set the expansion cone pipe of the expansion assembly on the stripped section and insert the first end into the inside of the flanged aluminum sheath;

[0021] Step six: connect the distance measuring assembly to the shaping assembly and the expansion assembly respectively, and signal connect the distance measuring assembly with the computer;

[0022] Step seven: push the expansion cone pipe to move towards the shaping assembly, monitor the expansion process of the expansion assembly through the computer, move the expansion cone pipe to the preset position and form a shaping cavity with the shaping cone hole, and the expanded aluminum sheath is compacted and shaped in the shaping cavity.

[0023] Compared with the prior art, the aluminum sheath expansion and shaping tool has the following advantages: (1) the fixing assembly is fixedly connected to the non-stripped section of the cable, which can provide positioning for the installation of the shaping assembly on the stripped section of the cable and reliable support for the expansion operation of the expansion assembly, and can ensure that the aluminum sheath expansion and shaping tool is concentric with the cable to prevent eccentric scratching of the cable insulation shield layer during expansion.

[0024] (2) The preliminary flanging tool is used to preliminarily flange the end of the aluminum sheath, so that the aluminum sheath port forms a preliminary opening structure, which provides a guide and space basis for the insertion of the expansion cone pipe into the inside of the aluminum sheath, and avoids difficulty in inserting the expansion cone pipe into the inside of the aluminum sheath or damaging the insulation shield layer.

[0025] (3) The expansion cone pipe is arranged in a tapered structure gradually decreasing from the second end to the first end, so that the expansion cone pipe can be gradually inserted into the inside of the flanged aluminum sheath from the small end (first end) to the large end (second end), realizing uniform expansion of the aluminum sheath and forming a horn structure of the aluminum sheath.

[0026] (4), by setting the shaping taper hole to be gradually smaller in the direction from the second end to the first end, the hole wall of the shaping taper hole can limit and guide the expansion angle and range of the aluminum sheath, prevent the uneven expansion of the trumpet mouth caused by uneven stress and excessive expansion of part of the circumferential surface during the expansion process, and cause the trumpet mouth to crack on one side; at the same time, since the hole wall of the shaping taper hole is located outside the aluminum sheath and the expansion taper pipe is located inside the aluminum sheath, and the hole wall of the shaping taper hole and the outer wall of the expansion taper pipe form a forming cavity, therefore, through the cooperation of the outer wall of the expansion taper pipe and the hole wall of the shaping taper hole, the expanded aluminum sheath can be compressed and shaped, and the expanded aluminum sheath is limited in the forming cavity, so as to ensure that the edge of the trumpet mouth of the expanded aluminum sheath is flush with the end face of the forming cavity, the trumpet mouth conical surface is regular, the edge is flat, the surface quality of the trumpet mouth of the expanded aluminum sheath is improved, and the concentricity between the trumpet mouth and the cable is improved, which provides a good interface basis for subsequent aluminum pipe welding, so as to improve the adhesion and welding quality of the subsequent transition aluminum pipe. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of an aluminum sheath expansion shaping tool provided by an embodiment of the present application;

[0028] Figure 2 is a partial sectional view of an aluminum sheath expansion shaping tool provided by an embodiment of the present application;

[0029] Figure 3 is a structural schematic diagram of a fixing assembly provided by an embodiment of the present application;

[0030] Figure 4 is a sectional view of a fixing assembly provided by an embodiment of the present application;

[0031] Figure 5 is a structural schematic diagram of a shaping assembly provided by an embodiment of the present application;

[0032] Figure 6 is a front view of a shaping assembly provided by an embodiment of the present application;

[0033] Figure 7 is a sectional view of a shaping assembly provided by an embodiment of the present application;

[0034] Figure 8 is a front view of an expansion assembly provided by an embodiment of the present application;

[0035] Figure 9 is a structural schematic diagram of an expansion taper pipe provided by an embodiment of the present application;

[0036] Figure 10 is a sectional view of an expansion taper pipe provided by an embodiment of the present application;

[0037] Figure 11is a structural schematic diagram of a cable provided by an embodiment of the present application;

[0038] Figure 12 is a structural diagram of a pre-flanging tool provided by an embodiment of the present application;

[0039] Figure 13 is an effect diagram of an aluminum sheath expansion and shaping tool applied to a cable provided by an embodiment of the present application;

[0040] Figure 14 is a partial sectional view of an aluminum sheath expansion and shaping tool applied to a cable provided by an embodiment of the present application.

[0041] In the figure, 100, expansion and shaping tool;

[0042] 1, fixing assembly; 11, first fixing clamp; 12, second fixing clamp; 13, fixing bolt; 14, rubber pad; 110, clamping through hole;

[0043] 2, pre-flanging tool;

[0044] 3, shaping assembly; 31, shaping piece; 32, first annular plate; 33, mounting plate; 310, shaping taper hole; 320, protection through hole; 311, first shaping clamp; 312, second shaping clamp; 313, connecting bolt; 321, first connecting hole; 3111, limiting groove; 3121, limiting protrusion;

[0045] 4, expansion assembly; 41, expansion taper pipe; 42, second annular plate; 43, expansion bolt; 44, expansion nut; 410, shaping cavity; 411, first end; 412, second end; 421, second connecting hole;

[0046] 5, distance measuring assembly; 51, laser distance measuring sensor; 52, reflecting plate;

[0047] 6, fastening bolt;

[0048] 7, protective adhesive tape;

[0049] 10, first central axis; 20, second central axis; 30, third central axis;

[0050] 200, cable; 201, non-stripped section; 202, stripped section; 2011, outer sheath; 2012, aluminum sheath; 2013, insulation shielding layer; 2014, conductor. DETAILED DESCRIPTION

[0051] The specific embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0053] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0054] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having" and any variations thereof in the description, claims and foregoing drawings of this application are intended to cover non-exclusive inclusion.

[0057] Reference to an "embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another.

[0058] First aspect

[0059] As Figures 1-14 shown in the drawings, a preferred aluminum sheath expansion shaping tool 100 of an embodiment of the application is applied to a cable 200, which includes a non-stripped section 201 and a stripped section 202 connected in sequence.

[0060] The aluminum sheath expansion shaping tool 100 includes a fixing assembly 1, a pre-flanging tool 2, a shaping assembly 3, and an expansion assembly 4.

[0061] The fixing assembly 1 is used to be fixed to the non-stripped section 201 of the cable 200; the pre-flanging tool 2 is used to flange the aluminum sheath 2012 of the stripped section 202; the shaping assembly 3 includes a shaping piece 31 fixedly connected to one end of the fixing assembly 1, the shaping piece 31 has a shaping taper hole 310 suitable for the stripped section 202 to pass through; the expansion assembly 4 includes an expansion taper pipe 41 having opposite first and second ends 411 and 412, the first end 411 is arranged in the shaping taper hole 310 and is used to be inserted into the inner side of the flanged aluminum sheath 2012, and the second end 412 is located on the side of the shaping piece 31 away from the fixing assembly 1; wherein the diameter of the expansion taper pipe 41 gradually decreases from the second end 412 to the first end 411, the hole diameter of the shaping taper hole 310 gradually decreases from the second end 412 to the first end 411, and a forming cavity 410 is formed between the hole wall of the shaping taper hole 310 and the outer wall of the expansion taper pipe 41.

[0062] Based on this technical solution, by fixing the fixing assembly 1 to the non-stripped section 201 of the cable 200, the fixing assembly 1 can provide positioning for the installation of the shaping assembly 3 on the stripped section 202 of the cable 200 and reliable support for the expansion operation of the expansion assembly 4, and at the same time, the fixing assembly 1 can ensure that the aluminum sheath expansion shaping tool 100 is concentric with the cable 200, preventing eccentric scratching of the insulating and shielding layer 2013 of the cable 200 during expansion.

[0063] By preliminarily flanging the end of the aluminum sheath 2012 with the pre-flanging tool 2, a preliminary opening structure is formed at the port of the aluminum sheath 2012, which provides a guide and space basis for the subsequent insertion of the expansion taper pipe 41 into the inner side of the aluminum sheath 2012, avoiding the difficulty of inserting the expansion taper pipe 41 into the inner side of the aluminum sheath 2012 or damaging the insulating and shielding layer 2013.

[0064] By setting the expansion cone tube 41 as a tapered structure gradually decreasing in the direction from the second end 412 to the first end 411, the expansion cone tube 41 can be gradually inserted into the inside of the flared aluminum sheath 2012 from the small end (the first end 411) to the large end (the second end 412), realizing uniform expansion of the aluminum sheath 2012 and forming a flared structure of the aluminum sheath 2012.

[0065] By setting the shaping cone hole 310 as a tapered structure gradually decreasing in the direction from the second end 412 to the first end 411, the hole wall of the shaping cone hole 310 can limit and guide the expansion angle and range of the aluminum sheath 2012, preventing uneven flared extension of the flared mouth due to uneven stress and excessive expansion of part of the circumferential surface of the aluminum sheath 2012 during expansion, which may cause unilateral cracking of the flared mouth. At the same time, since the hole wall of the shaping cone hole 310 is located outside the aluminum sheath 2012 and the expansion cone tube 41 is located inside the aluminum sheath 2012, and the hole wall of the shaping cone hole 310 and the outer wall of the expansion cone tube 41 form a forming cavity 410, the expanded aluminum sheath 2012 can be compressed and shaped by the cooperation of the outer wall of the expansion cone tube 41 and the hole wall of the shaping cone hole 310, and the expanded aluminum sheath 2012 is limited in the forming cavity 410, to ensure that the flared edge of the expanded aluminum sheath 2012 is flush with the end face of the forming cavity, the flared conical surface is regular, and the edge is flat, improving the surface quality of the flared mouth of the expanded aluminum sheath and the concentricity between the flared mouth and the cable, providing a good interface basis for subsequent aluminum pipe welding, to improve the adhesion and welding quality of the subsequent transition aluminum pipe.

[0066] The aluminum sheath expansion and shaping tool 100 provided by the application has simple structure and convenient operation, can reduce the labor intensity of on-site construction, improve the expansion efficiency and forming consistency, meet the demand for high-quality flared mouth structure in the accessory installation process of smooth aluminum sheath cable, and has good engineering application prospect.

[0067] The end of the shaping cone hole 310 close to the fixed assembly 1 is the small end of the shaping cone hole 310, and the end of the shaping cone hole 310 away from the fixed assembly 1 is the large end of the shaping cone hole 310. The shaping cone hole 310 has a first central axis 10. The first end 411 is the small end of the expansion cone tube 41, and the second end 412 is the large end of the expansion cone tube 41.

[0068] It should be noted that the part of the cable on which the outer sheath 2011 is not stripped is a non-stripped section 201 of the cable, and the part of the cable on which the outer sheath 2011 has been stripped is a stripped section 202 of the cable; that is, the non-stripped section 201 comprises, from the outside to the inside, the outer sheath 2011, the aluminum sheath 2012, the insulating shielding layer 2013 and the conductor 2014, and the stripped section 202 comprises, from the outside to the inside, the aluminum sheath 2012, the insulating shielding layer 2013 and the conductor 2014. In the stripped section 202, the length of the aluminum sheath 2012 is less than the length of the insulating shielding layer 2013, and the length of the insulating shielding layer 2013 is less than the length of the conductor 2014.

[0069] The outer sheath 2011 is an outer insulating protective layer.

[0070] Referring to Figures 1-4 , and Figures 13-14 , the fixing assembly 1 comprises a first fixing clamp 11, a second fixing clamp 12 and a fixing bolt 13, the first fixing clamp 11 and the second fixing clamp 12 are fixedly connected together by the fixing bolt 13 and are formed with a clamping through hole 110 suitable for clamping and fixing the non-stripped section 201. The first fixing clamp 11 and the second fixing clamp 12 adopt a splicable structure design, and are tightly connected by the fixing bolt 13, so that the fixing assembly 1 can be stably clamped outside the non-stripped section 201 of the cable 200, providing a firm installation basis for the entire expansion and shaping tool 100, ensuring that the tool does not shift or shake during expansion and shaping, thereby ensuring the stability and consistency of the expansion and shaping. The first fixing clamp 11 and the second fixing clamp 12 can be quickly installed and disassembled by bolt connection, and only a wrench is needed to complete the operation, without the need for other complex tools or equipment, improving the on-site construction efficiency, reducing the operation difficulty and labor intensity, and having good operability and practicality. Moreover, the size of the clamping through hole 110 can be adaptively designed according to the outer diameter of the cable 200 of different specifications, so that the fixing assembly 1 has a wide application range, is convenient to apply to various cable 200 specifications, and improves the universality and adaptability of the tool.

[0071] The clamping through hole 110 has a third central axis 30, which is collinear with the first central axis 10. The design that the third central axis 30 (the central axis of the clamping through hole 110) is collinear with the first central axis 10 (the central axis of the shaping taper hole 310) ensures that the components during the entire process from cable clamping to expansion shaping are on the same axis. This coaxial arrangement enables the aluminum sheath to maintain good centering during the entire expansion process, avoiding the problem of poor shaping caused by eccentricity or asymmetry. When the central axes of the clamping through hole 110 and the shaping taper hole 310 coincide, the expansion taper pipe 41 can move accurately along the predetermined path during the advancing process, thereby achieving uniform and stable expansion, ensuring that the overall shape of the aluminum sheath after expansion is regular and the edges are neat, and improving the surface quality of the horn mouth after expansion of the aluminum sheath and the concentricity between the horn mouth and the cable.

[0072] A rubber pad layer 14 is arranged between the hole wall of the clamping through hole 110 and the surface of the non-stripped section 201.

[0073] The rubber pad layer 14 has good elasticity and friction performance, and can play a buffering and isolation role during the clamping of the fixing assembly 1, preventing the first fixing clamp 11 and the second fixing clamp 12 from directly contacting the outer surface of the cable 200, thereby avoiding causing indentation, scratches or other mechanical damage to the outer sheath 2011 or internal structure of the cable 200 during clamping, and significantly improving the safety of the tool. The rubber pad layer 14 can also enhance the friction during clamping, making the fixing assembly 1 more stable when clamping the non-stripped section 201 of the cable 200, preventing the tool from slipping or shifting during expansion, and further ensuring the stability and consistency of the expansion shaping operation. During the subsequent expansion process, the cable 200 may be slightly deformed or displaced with the application of expansion force, at which time the rubber pad layer 14 can also play a certain dynamic buffering role, preventing damage to the cable 200 body due to stress concentration or excessive local stress, and further improving the construction quality and operation reliability.

[0074] The material of the rubber pad layer 14 can be, but is not limited to, natural rubber, nitrile rubber, silicone rubber, ethylene propylene diene rubber, polyurethane rubber, etc.

[0075] In some specific embodiments, the shaping assembly 3 is detachably connected with the fixing assembly 1 through fastening bolts 6, and the number of the fastening bolts 6 is multiple, and the multiple fastening bolts 6 are arranged around the first central axis 10. The detachable connection between the shaping assembly 3 and the fixing assembly 1 is achieved by arranging the fastening bolts 6, so that the operation of the two during installation and disassembly is more convenient, and the connection or separation operation can be completed only by using a wrench without the aid of other complex tools or equipment, thereby reducing the on-site operation difficulty and labor intensity, improving the construction efficiency, and being especially suitable for the quick replacement and reuse of cables 200 of multiple specifications. Moreover, the bolt connection mode not only ensures convenience, but also has good structural stability, and the fastening bolts 6 can effectively prevent the shaping assembly 3 from moving or deviating axially during the expansion of the aluminum sheath 2012, so as to ensure that the shaping assembly 3 and the fixing assembly 1 are stably matched, thereby guaranteeing the continuity and forming quality of the expansion shaping process of the aluminum sheath 2012.

[0076] Referring to Figure 12 , the pre-flanging wrench is a Y-shaped flanging tool, one of the tips of which is a conical structure, which facilitates better insertion into the gap between the aluminum sheath 2012 and the insulating shielding layer 2013, and the other tip is longer and can be used as a support point to assist the conical tip in flanging, and the tips are rounded to effectively avoid damage to the cable 200 during flanging.

[0077] In some specific embodiments, the pre-flanging tool 2 is a wrench.

[0078] Referring to Figures 1-2 , and Figures 5-7 , and Figures 13-14 The shaping piece 31 includes a first shaping clamp 311, a second shaping clamp 312, and a connecting bolt 313, and the first shaping clamp 311 and the second shaping clamp 312 are fixedly connected together through the connecting bolt 313 and form a shaping taper hole 310. In this way, by symmetrically arranging and clamping the first shaping clamp 311 and the second shaping clamp 312 on both sides of the aluminum sheath 2012, the shaping taper hole 310 can symmetrically and uniformly surround the aluminum sheath 2012, thereby effectively guiding and limiting the deformation of the aluminum sheath 2012 during the expansion process, further improving the concentricity and forming consistency of the horn mouth expansion; at the same time, the clamping structure is convenient to disassemble and replace, and the corresponding size of the shaping clamp can be replaced according to the aluminum sheath 2012 of the cable 200 of different specifications, thereby improving the universality and application range of the tooling; in addition, the fastening mode of the connecting bolt 313 is simple in structure and reliable in connection, which is convenient for on-site operation and reduces the assembly difficulty and maintenance cost.

[0079] In some specific embodiments, the first shaping clamp 311 and the second shaping clamp 312 are both in the form of a half-round structure of a Havertube.

[0080] The first shaping clamp 311 is provided with a limiting recess 3111, and the second shaping clamp 312 is provided with a limiting protrusion 3121 embedded with the limiting recess 3111. By setting the concave-convex groove limiting structure composed of the limiting recess 3111 and the limiting protrusion 3121, the first shaping clamp 311 and the second shaping clamp 312 have higher positioning accuracy and connection stability in the clamping state, so that relative sliding or misplacement between the first shaping clamp 311 and the second shaping clamp 312 is prevented from occurring in the expansion process of the aluminum sheath 2012, thereby avoiding problems such as poor horn mouth forming and poor concentricity caused by the deviation of the clamp, and further improving the consistency of the expansion shaping.

[0081] The aluminum sheath expansion shaping tool 100 further comprises a protective adhesive tape 7; a protective through hole 320 is further formed between the first shaping clamp 311 and the second shaping clamp 312, the protective through hole 320 is connected with the end of the shaping taper hole 310 away from the expansion assembly 4 and is adapted for the stripped section 202 to pass through; and the protective adhesive tape 7 is wound on the outer surface of the aluminum sheath 2012 of the stripped section 202 and is located in the protective through hole 320.

[0082] The protective through hole 320 provides a passing space for the stripped section 202 of the cable 200, and the protective adhesive tape 7 wound on the outer surface of the aluminum sheath 2012 can play a buffering and isolating role in the clamping process of the shaping assembly 3, so as to prevent the first shaping clamp 311 and the second shaping clamp 312 from causing damage such as scratches and indentations on the outer surface of the cable 200.

[0083] In the subsequent expansion process, with the insertion of the expansion taper pipe 41 and the gradual expansion of the aluminum sheath 2012, the aluminum sheath 2012 will be deformed and displaced to a certain extent, at which time the protective adhesive tape 7 can also play a certain sliding buffering role, so as to prevent the aluminum sheath 2012 from scratching the cable 200 body due to friction or uneven local stress in the expansion process, and further improve the safety and reliability of the expansion operation.

[0084] In some specific embodiments, the protective adhesive tape 7 is a PVC adhesive tape.

[0085] The shaping assembly 3 further comprises a first annular plate 32 fixedly connected to the outer wall of the shaping member 31, and the first annular plate 32 is provided with a plurality of first connecting holes 321 arranged around the first central axis 10; the expanding assembly 4 further comprises a second annular plate 42, a plurality of expansion bolts 43 and a plurality of expansion nuts 44, the second annular plate 42 is fixedly connected to the outer wall of the second end 412 and is arranged in a spaced manner with the first annular plate 32, the expansion cone tube 41 has a second central axis 20, the second central axis 20 and the first central axis 10 are collinear, the second annular plate 42 is provided with a plurality of second connecting holes 421 arranged around the second central axis 20, and the expansion nut 44 is threadedly connected with the expansion bolt 43 and located on the side of the second annular plate 42 away from the first annular plate 32; the plurality of first connecting holes 321, the plurality of second connecting holes 421, the plurality of expansion bolts 43 and the plurality of expansion nuts 44 are arranged in a one-to-one correspondence.

[0086] By sequentially passing the expansion bolts 43 through the connecting holes on the first annular plate 32 and the second annular plate 42 and tightening the expansion nuts 44, the expansion cone tube 41 can be driven to move along the central axis direction to the shaping assembly 3, so as to gradually expand the pre-flanged aluminum sheath 2012; since the closed forming cavity 410 is formed between the expansion cone tube 41 and the shaping cone hole 310, during the expansion process, the aluminum sheath 2012 is subjected to the combined action of the outer wall of the expansion cone tube 41 and the inner wall of the shaping cone hole 310, achieving uniform expansion and shaping. Moreover, the expansion mode can be completed by tightening the expansion bolts 43 with a wrench, without the need for hydraulic equipment, electric push rod equipment, air cylinder equipment or other complex power devices, thereby saving the cumbersome debugging steps in the existing expansion equipment, and achieving simple operation, high construction efficiency and low labor intensity, which is suitable for rapid construction requirements under various working conditions on site.

[0087] When the first central axis 10 (the central axis of the shaping cone hole 310) and the second central axis 20 (the central axis of the expansion cone tube 41) are collinear, the expansion cone tube 41 can be accurately moved along the central axis direction of the shaping cone hole 310 during the advancing process to the shaping assembly 2, and such coaxial arrangement ensures that the aluminum sheath is subjected to uniform expansion force in the entire circumferential direction, avoiding problems such as deformation of the horn mouth and uneven edges caused by eccentric or asymmetric expansion.

[0088] The plurality of expansion bolts 43 are uniformly distributed around the central axis, which can ensure balanced force during expansion, effectively avoid aluminum sheath 2012 cracking or deformation caused by expansion deviation or local excessive force, and further improve the horn mouth forming quality and consistency.

[0089] It can be understood that the one-to-one correspondence of the plurality of first connecting holes 321, the plurality of second connecting holes 421, the plurality of expansion bolts 43 and the plurality of expansion nuts 44 means that one expansion bolt 43 is arranged in one first connecting hole 321 and one second connecting hole 421 and is threadedly connected with one expansion nut 44.

[0090] The aluminum sheath expansion and shaping tool 100 further comprises a distance measuring assembly 5, the distance measuring assembly 5 comprising a plurality of laser distance measuring sensors 51 and a plurality of reflecting plates 52, the laser distance measuring sensors 51 being connected to the first annular plate 32, the plurality of laser distance measuring sensors 51 being arranged around the first central axis 10, the reflecting plates 52 being connected to the second annular plate 42, the plurality of reflecting plates 52 and the plurality of laser distance measuring sensors 51 being arranged in one-to-one correspondence.

[0091] By arranging the laser distance measuring sensors 51 and the reflecting plates 52 on the first annular plate 32 and the second annular plate 42 respectively, the distance measuring assembly 5 can monitor the relative displacement between the expansion cone pipe 41 and the shaping assembly 3 in real time during the expansion process, thereby reflecting the expansion displacement of each part of the aluminum sheath 2012; since the plurality of laser distance measuring sensors 51 are uniformly distributed around the first central axis 10, the expansion of the aluminum sheath 2012 in the circumferential direction can be synchronously detected at multiple points, so that the operator or the control system can timely grasp the deformation state of the aluminum sheath 2012 in each direction during the expansion process, and once it is found that the expansion speed of a part of the aluminum sheath 2012 is too fast or too slow, the expansion speed can be immediately adjusted to prevent problems such as eccentricity of the trumpet mouth, uneven edges, poor concentricity and the like caused by asynchronous expansion, thereby improving the expansion forming quality.

[0092] The distance measuring process of the distance measuring assembly 5 is as follows: the laser distance measuring sensor 51 emits laser light through a laser emitting port, the laser light is reflected by the reflecting plate 52 on the expansion assembly 4 and then enters a laser receiving port of the laser distance measuring sensor 51, and according to the reflection time difference, the distance data of the reflecting plate 52 from the laser distance measuring sensor 51 is finally output to a computer for display through an algorithm, so as to achieve the purpose of expansion process monitoring.

[0093] The shaping assembly 3 further comprises a mounting plate 33, and the laser distance measuring sensor 51 is connected to the first annular plate 32 through the mounting plate 33.

[0094] The second aspect

[0095] The present application also provides an aluminum sheath expansion method, the method applying the aluminum sheath expansion and shaping tool 100 according to any one of the above, and the method comprising the following steps:

[0096] Step one: the outer sheath 2011 of the cable 200 is peeled off to divide the cable 200 into a peeled section 202 and a non-peeled section 201, and the aluminum sheath 2012 of the cable 200 is exposed in the peeled section 202;

[0097] Step two: using the pre-flanging tool 2 to flange the aluminum sheath 2012 of the stripped section 202;

[0098] Step three: clamping and fixing the fixing assembly 1 on the non-stripped section 201 of the cable 200;

[0099] Step four: clamping and fixing the shaping assembly 3 on the stripped section 202 of the cable 200, and fixing the shaping assembly 3 with the fixing assembly 1;

[0100] Step five: setting the expansion cone tube 41 of the expansion assembly 4 on the stripped section 202 and inserting the first end 411 into the inside of the flanged aluminum sheath 2012;

[0101] Step six: connecting the distance measuring assembly 5 to the shaping assembly 3 and the expansion assembly 4 respectively, and signal connecting the distance measuring assembly 5 with the computer;

[0102] Step seven: pushing the expansion cone tube 41 to move towards the shaping assembly 3, and monitoring the expansion process of the expansion assembly 4 through the computer, the expansion cone tube 41 moves to the preset position and forms a shaping cavity 410 with the shaping cone hole 31, and the expanded aluminum sheath 2012 is compressed and shaped in the shaping cavity 410.

[0103] Specifically, in step one, the insulating shield layer 2013 of the stripped section 202 is exposed more than 400mm from the end surface of the outer sheath 2011 of the non-stripped section 201, and the aluminum sheath 2012 of the stripped section 202 is exposed more than 200mm from the end surface of the outer sheath 2011 of the non-stripped section 201.

[0104] In step two, the flange gap of the aluminum sheath 2012 is not greater than 5mm by using the pre-flanging wrench; the flange length of the aluminum sheath 2012 does not need to be too large, only the conical tip of the pre-flanging tool 2 can enter.

[0105] In step three, the fixing assembly 1 includes a first fixing clamp 11, a second fixing clamp 12 and a fixing bolt 13, the first fixing clamp 11 and the second fixing clamp 12 are fixed on the outer wall of the outer sheath 2011 of the non-stripped section 201 of the cable 200 through the fixing bolt 13, a clamping through hole 110 suitable for clamping and fixing the non-stripped section 201 is formed between the first fixing clamp 11 body and the second fixing clamp 12, and a rubber pad layer 14 is arranged between the hole wall of the clamping through hole 110 and the outer surface of the outer sheath 2011 of the non-stripped section 201; the fixing assembly 1 is 175mm away from the pre-flanged port of the smooth aluminum sheath 2012, which is used for positioning the installation of the subsequent shaping assembly 3, and the rubber pad layer 14 is arranged directly on the surface of the outer sheath 2011 of the cable 200 to prevent damage to the cable 200 during clamping the cable 200 and the subsequent expansion and shaping process.

[0106] In step four, the shaping assembly 3 comprises a shaping piece 31, the shaping piece 31 comprises a first shaping clamp 311, a second shaping clamp 312 and a connecting bolt 313, the first shaping clamp 311 and the second shaping clamp 312 are fixed on the outer wall of the stripped section 202 of the cable 200 through the connecting bolt 313, the first shaping clamp 311 and the second shaping clamp 312 form a protection through hole 320 and a shaping taper hole 310 which are in communication with each other, the already flanged aluminum sheath 2012 of the non-stripped section 201 is located in the shaping taper hole 310, the outer surface of the aluminum sheath 2012 of the non-stripped section 201 located in the protection through hole 320 is wrapped with a protection tape 7, and the shaping assembly 3 is fixedly connected with the fixing assembly 1 through the fastening bolt 6;

[0107] In step five, the expansion assembly 4 comprises an expansion taper pipe 41, the expansion taper pipe 41 is sleeved on the insulating shielding layer 2013 of the stripped section 202, and the first end 411 of the expansion taper pipe 41 is inserted into the inner side of the already flanged aluminum sheath 2012; the expansion assembly 4 and the shaping assembly 3 are connected through the expansion bolt 43 and the expansion bolt 43; wherein the expansion taper pipe 41 is connected with the second annular plate 42 through threads, which facilitates the replacement of expansion tapers of different specifications for cables 200 of different sizes, and the second annular plate 42 is provided with a reflection plate 52 structure on the circumferential surface, which facilitates the positioning of the subsequent expansion taper assembly.

[0108] In step six, the laser ranging sensor 51 is connected to the mounting plate 33 of the shaping assembly 3, and the laser ranging sensor 51 is signal-connected with a computer; the laser ranging sensor 51 uses RS485 communication protocol to access the computer.

[0109] In step seven, the expansion bolt 43 around the second annular plate 42 of the expansion assembly 4 is rotated in turn using a wrench tool, so that the reaction force of the expansion bolt 43 pushes the expansion assembly 4 to move towards the shaping assembly 3, at this time the distance between the reflection plate 52 and the laser ranging sensor 51 monitored by the laser ranging sensor 51, i.e. the expansion process, will be displayed on the computer, the expansion process data is monitored, the rotation process of each expansion bolt 43 is adjusted, the distance difference between each sensor is ensured to be ≤2mm, so as to achieve the purpose of synchronizing the expansion process of each part on the circumferential surface of the expansion taper assembly; when the expansion taper pipe 41 and the shaping taper hole 310 form a closed forming cavity 410, the outer wall of the expansion taper pipe 41 and the hole wall of the shaping taper hole 310 press the aluminum sheath 2012, so as to shape the expanded aluminum sheath 2012.

[0110] Finally, the aluminum sheath expansion and shaping tool 100 is removed, and thus the aluminum sheath 2012 expansion method of the present application is completed.

[0111] The wrench tool can be a manual wrench or an electric wrench.

[0112] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, several improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. An aluminum sheath expansion and shaping fixture, applied to a cable, the cable comprising a non-stripped section and a stripped section connected in sequence; characterized in that, The aluminum sheath expansion and shaping fixture includes: A fixing component for securing the non-stripped section of the cable; A pre-flanging tool for flanging the aluminum sheath of the stripped section; A shaping assembly includes a shaping element fixedly connected to one end of a fixing assembly, the shaping element having a shaping cone hole adapted for the stripped segment to pass through; An expansion assembly includes an expansion tapered tube having a first end and a second end opposite to each other. The first end is disposed within the shaping tapered hole and is used to insert into the inner side of the already flanged aluminum sheath. The second end is located on the side of the shaping member opposite to the fixing assembly. The diameter of the expanding conical tube gradually decreases from the second end to the first end, the diameter of the shaping conical hole gradually decreases from the second end to the first end, and a forming cavity is formed between the hole wall of the shaping conical hole and the outer wall of the expanding conical tube.

2. The aluminum sheath expansion and shaping fixture according to claim 1, characterized in that, The shaping component includes a first shaping clamp, a second shaping clamp, and a connecting bolt. The first shaping clamp and the second shaping clamp are fixedly connected together by the connecting bolt to form the shaping cone hole.

3. The aluminum sheath expansion and shaping fixture according to claim 2, characterized in that, The first shaping clamp has a limiting groove, and the second shaping clamp has a limiting protrusion that fits into the limiting groove.

4. The aluminum sheath expansion and shaping fixture according to claim 2, characterized in that, It also includes protective tape; A protective through hole is also formed between the first shaping clamp and the second shaping clamp. The protective through hole is connected to the end of the shaping cone hole away from the expansion component and is adapted for the stripped section to pass through. The protective tape is wrapped around the outer surface of the aluminum sheath of the stripped section and located inside the protective through hole.

5. The aluminum sheath expansion and shaping fixture according to any one of claims 1-4, characterized in that, The shaping component further includes a first annular plate, which is fixedly connected to the outer wall of the shaping component. The shaping cone hole has a first central axis, and the first annular plate is provided with a plurality of first connecting holes arranged around the first central axis. The expansion assembly further includes a second annular plate, a plurality of expansion bolts and a plurality of expansion nuts. The second annular plate is fixedly connected to the outer wall of the second end and spaced apart from the first annular plate. The expansion tapered tube has a second central axis, which is collinear with the first central axis. The second annular plate is provided with a plurality of second connecting holes arranged around the second central axis. The expansion nuts are threadedly connected to the expansion bolts and are located on the side of the second annular plate away from the first annular plate. Multiple first connecting holes, multiple second connecting holes, multiple expansion bolts, and multiple expansion nuts are provided in a one-to-one correspondence.

6. The aluminum sheath expansion and shaping fixture according to claim 5, characterized in that, It also includes a ranging component, which includes multiple laser ranging sensors and multiple reflectors. The laser ranging sensors are connected to a first annular plate, and the multiple laser ranging sensors are arranged around the first central axis. The reflectors are connected to a second annular plate, and the multiple reflectors and the multiple laser ranging sensors are arranged in a one-to-one correspondence.

7. The aluminum sheath expansion and shaping fixture according to claim 5, characterized in that, The shaping component is detachably connected to the fixing component by fastening bolts. There are multiple fastening bolts arranged around the first central axis.

8. The aluminum sheath expansion and shaping fixture according to claim 1, characterized in that, The fixing assembly includes a first fixing clip, a second fixing clip, and a fixing bolt. The first fixing clip and the second fixing clip are fixedly connected together by the fixing bolt and form a clamping through hole suitable for clamping and fixing the non-peeled segment.

9. The aluminum sheath expansion and shaping fixture according to claim 8, characterized in that, A rubber pad is provided between the wall of the clamping through hole and the surface of the non-peeling section.

10. A method for expanding an aluminum sheath, characterized in that, The application of the aluminum sheath expansion and shaping fixture according to any one of claims 1-10 includes the following steps: Step 1: Strip the outer sheath of the cable to separate the cable into stripped and unstripped sections, with the stripped sections exposing the aluminum sheath of the cable. Step 2: Use a pre-flanging tool to flanging the aluminum sheath of the stripped section; Step 3: Secure the fixing component to the non-stripped section of the cable; Step 4: Clamp and fix the shaping component to the stripped section of the cable, and securely connect the shaping component to the fixing component; Step 5: Fit the expansion cone of the expansion assembly onto the stripped section and insert the first end into the inside of the flanged aluminum sheath; Step 6: Connect the ranging component to the shaping component and the expanding component respectively, and connect the ranging component to the computer for signal transmission; Step 7: Push the expansion cone tube towards the shaping component, and monitor the expansion process of the expansion component through the computer. The expansion cone tube moves to the preset position and forms a forming cavity with the shaping cone hole. The expanded aluminum sheath is pressed and shaped in the forming cavity.

Images