CN117712981A - Cable butt joint protection architecture - Google Patents

Abstract

The invention discloses a cable butt joint protection structure which can butt joint two cables, can ensure firm butt joint, good sealing effect and relatively easy disassembly, and can also ensure that the protection structure at the butt joint can still have good structural stability and sealing performance under the conditions of large tensile force, large bending force and the like. The main structure of this application includes interior crimping copper pipe and outer rigidity pillar, go up the rigidity half pipe and include two upper semi-ring end plates of upper semi-pipe body level, lower rigidity half pipe includes lower semi-pipe body and two lower semi-ring end plates, the contact surface department of upper semi-pipe body and lower semi-pipe body all is equipped with the sealing strip, be equipped with the upper semi-seal circle on the upper semi-ring end plate, be equipped with the lower semi-seal circle on the lower semi-ring end plate, the upper semi-seal circle constitutes the end hole sealing washer jointly with the lower semi-seal circle, the upper semi-ring end plate constitutes the tip crown jointly with the lower semi-ring end plate, the middle part of interior crimping copper pipe is equipped with copper pipe mesopore and lower copper pipe mesopore, be equipped with the bolt on the upper rigidity half pipe, be equipped with down the bolt on the lower rigidity half pipe.

Description

Cable butt joint protection architecture

Technical Field

The invention belongs to the technical field of power cables, and particularly relates to a cable butt joint protection structure.

Background

The cable protective sleeve is a protective structure at the joint of the cables. In electrical and power engineering, there are often cases where two cables need to be butted. After the cable cores of two cables are butted, two protection methods are adopted at present;

the first method is as follows: the PE protective sleeve (or an insulating protective sleeve made of other materials) is sleeved at the joint for protection. However, if the cable core of the cable is to be spliced, the wire skin (i.e. the outer sleeve of the cable core) at the splicing position needs to be peeled off first and then the splicing can be performed, so that the wire skin at the splicing position is naturally also missing and discontinuous after the splicing is completed. This results in the PE protective cover being somewhat protective of the cable butt joint, but being deficient in terms of tensile strength, torsion-breaking strength, sealing ability, etc.

The second method is as follows: the method for adding the protective sleeve comprises the steps of sleeving the protective sleeve and the related structure on one of the two cables before butting the two cables, butting cable cores of the two cables, moving the protective sleeve and the related structure (sealing structure, locking structure and the like) to pass through the butting position after butting, finally enabling the whole butting position to be positioned in the moved protective sleeve, and fixing the moved protective sleeve and the wire skins of the two cables. Such methods are employed, for example, in the patent publication CN 111969548. The protection structure in the method is stronger in tensile capacity, torsion breaking capacity, sealing capacity and the like than the protection structure in the first method, but has two obvious defects that firstly, the protection structure still belongs to soft structure connection, namely the protection sleeve is finally fixed with relatively soft wire leather, so that when the two sides (two ends) of the butt joint are subjected to large tensile force, the butt joint is subjected to large bending force and the like, the risks that the protection sleeve moves, loosens and the sealing is easy to lose (the sealing effect naturally obviously declines or fails once moving or bending deformation occurs) still exist, and secondly, the protection structure cannot be easily removed after the cable is butted, and the protection structure is possibly removed only by cutting off the cable again or violently removing the protection sleeve, so that the protection structure is inconvenient for subsequent maintenance.

Description: in general, many cables used in electrical and electrical engineering are relatively thick, as are the inner cores (the cores being composed of multiple copper cores side by side or helically wound), which are also relatively thick, as opposed to conventional household 2.5 square (mm) copper wires or 4 square (mm) copper wires. In addition, the use environment of the cable is various and complex, such as tunnel, mountain, sand, snow, and strong wind, so that the situation that the two sides of the butt joint are subjected to a large tensile force and the butt joint is subjected to a large bending force in the second method is also more common.

Supplementing: crimping pliers, also called crimping machines, are necessary tools for conducting wire and related structure connection crimping in the construction of foundation construction and line maintenance of line substrates in the power industry, and have manual, automatic and other forms.

Disclosure of Invention

The invention provides a cable butt joint protection structure which can butt joint two cables, can ensure firm butt joint, good sealing effect and relatively easy disassembly, and can also ensure that the protection structure at the butt joint can still have good structural stability and sealing performance under the conditions of large tensile force, large bending force and the like.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

a cable butt joint protection structure comprises an internal pressure welding copper pipe and an external rigid protection pipe formed by butt joint of an upper rigid half pipe and a lower rigid half pipe;

the upper rigid half pipe and the lower rigid half pipe are fixedly connected through a plurality of protection pipe bolts, the upper rigid half pipe comprises an upper half pipe body, an upper semi-ring end plate arranged at one end of the upper half pipe body and an upper semi-ring end plate arranged at the other end of the upper half pipe body, the lower rigid half pipe comprises a lower half pipe body, a lower semi-ring end plate arranged at one end of the lower half pipe body and a lower semi-ring end plate arranged at the other end of the lower half pipe body, and sealing strips are arranged at the contact surfaces of the upper half pipe body and the lower half pipe body;

the upper semi-ring end plates and the lower semi-ring end plates are in one-to-one correspondence, and the corresponding upper semi-ring end plates and lower semi-ring end plates are: the upper semi-ring end plate is provided with an upper semi-sealing ring in sealing contact with the cable, the lower semi-ring end plate is provided with a lower semi-sealing ring in sealing contact with the cable, the upper semi-sealing ring and the lower semi-sealing ring jointly form an end hole sealing ring, the end hole sealing ring is in sealing contact with the sealing strip, and the upper semi-ring end plate and the lower semi-ring end plate jointly form an end ring plate;

the middle part of the internal pressure copper pipe is provided with an upper copper pipe middle hole and a lower copper pipe middle hole, the upper rigid half pipe is provided with an upper bolt in threaded fit with the upper rigid half pipe, the upper bolt comprises an upper bolt head positioned outside the outer rigid protection pipe and an upper screw in threaded fit with the upper copper pipe middle hole, the lower rigid half pipe is provided with a lower bolt in threaded fit with the lower rigid half pipe, and the lower bolt comprises a lower bolt head positioned outside the outer rigid protection pipe and a lower screw in threaded fit with the lower copper pipe middle hole.

Preferably, two U-shaped anti-drop devices symmetrically arranged along the axis of the outer rigid guard pipe are arranged in the outer rigid guard pipe, a plurality of guide rods are arranged in the upper rigid half pipe, and a plurality of guide rods are arranged in the lower rigid half pipe;

in a U-shaped anti-drop device: the U-shaped anti-drop device comprises a transverse matching piece and two anti-drop pressing pieces, wherein the two anti-drop pressing pieces are used for pressing a compression joint surface of the inner compression joint copper pipe, one anti-drop pressing piece is arranged at one end of the transverse matching piece, the other anti-drop pressing piece is arranged at the other end of the transverse matching piece, and the anti-drop pressing pieces, the middle hole of the upper copper pipe and the other anti-drop pressing piece are sequentially arranged along the axial direction of the outer rigid protection pipe;

one U-shaped anti-drop device is in sliding connection with a guide rod arranged in the upper rigid half pipe and is in threaded fit with an upper bolt, and the U-shaped anti-drop device is close to the inner pressure copper pipe in the process that the upper bolt head of the upper bolt is close to the outer rigid protective pipe;

the other U-shaped anti-drop device is in sliding connection with a guide rod arranged in the lower rigid half pipe, the U-shaped anti-drop device is in threaded fit with the lower bolt, and the U-shaped anti-drop device is close to the internal pressure copper pipe in the process that the lower bolt head of the lower bolt is close to the external rigid protection pipe.

Preferably, the upper bolt axis coincides with the lower bolt axis, and the guide rods are arranged in parallel;

in the upper bolt and the U-shaped anti-drop device in threaded fit with the upper bolt: the upper bolt is in threaded fit with the transverse fitting piece;

in lower bolt and with lower bolt screw thread fit's U type anticreep ware: the lower bolt is in threaded fit with the transverse fitting piece.

Preferably, the inner hole of the internal pressure copper pipe is formed by a middle pore canal, two split core outer flaring pore canals and two cable core positioning pore canals, a tensioning positioning sleeve is arranged in the middle pore canal, a jacking hole through which a screw rod can pass is arranged on the tensioning positioning sleeve, one cable core positioning pore canal, one split core outer flaring pore canal, an inner hole of the tensioning positioning sleeve, the other split core outer flaring pore canal and the other cable core positioning pore canal are sequentially arranged along the axial direction of the internal pressure copper pipe, two outer flaring sliding shafts in one-to-one correspondence with the outer flaring pore canals are arranged on the inner hole of the tensioning positioning sleeve, and the corresponding outer flaring pore canals and the outer flaring sliding shafts are arranged in the following manner: the outer expansion sliding shaft is characterized in that one end of the outer expansion sliding shaft is provided with a top half ball head capable of being jacked by an upper bolt, the other end of the outer expansion sliding shaft is provided with an outer expansion half ball head used for pushing each copper wire core of the cable core into the outer flaring duct of the split core, and the outer expansion sliding shaft moves towards the outer flaring duct of the split core in the process that the upper screw contacts the top half ball head and the upper bolt head is close to the outer rigid protection pipe.

Preferably, the diameter of the split core outer flaring duct is R, the diameter of the cable core positioning duct is R, the diameter of each copper wire core in the cable is M, (R-R) > 0.3M, and in the corresponding outer flaring duct and outer flaring sliding shaft: when the upper bolt moves down to the limit position, the outer flaring half ball head is completely positioned in the outer flaring pore canal.

Preferably, the upper screw is sleeved with an upper outer sealing ring, the upper outer sealing ring is positioned outside the outer rigid protection pipe, the vertical projection of the upper outer sealing ring falls in the vertical projection range of the upper bolt head, when the upper screw moves down to the limit position, the upper outer sealing ring is pressed on the outer rigid protection pipe by the upper bolt head, the lower screw is sleeved with a lower outer sealing ring, the lower outer sealing ring is positioned outside the outer rigid protection pipe, the vertical projection of the lower outer sealing ring falls in the vertical projection range of the lower bolt head, and when the lower screw moves up to the limit position, the lower outer sealing ring is pressed on the outer rigid protection pipe by the lower bolt head.

Preferably, two upper extending lugs are arranged on the outer side of the upper rigid half pipe and are oppositely arranged along the upper rigid half pipe, two lower extending lugs are arranged on the outer side of the lower rigid half pipe and are oppositely arranged along the upper rigid half pipe, the upper extending lugs and the lower extending lugs are in one-to-one correspondence, and the corresponding upper extending lugs and lower extending lugs are: the upper extending lugs are attached to the lower extending lugs, at least one of the protective tube bolts is in threaded fixation with the upper extending lugs, and the protective tube bolts in threaded fixation with the upper extending lugs are also in threaded fixation with the lower extending lugs.

The beneficial effects of the invention are as follows: the two cables can be butted, so that firm butt joint, good sealing effect and relatively easy disassembly of the butt joint can be ensured, and the protection structure of the butt joint can still have good structural stability and sealing performance under the conditions of larger tensile force, larger bending force and the like; the protection structure at the butt joint part can clamp the joint part of the internal pressure welding copper pipe and the cable core, so that looseness between the internal pressure welding copper pipe and the cable core is avoided; the enlarged tail end of the cable core can be created, so that the tail end of the cable core cannot be separated from the flaring duct outside the split core, and the fixing firmness and stability between the inner crimping copper pipe and the cable core are further ensured.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is an enlarged view at B in FIG. 2;

fig. 4 is an enlarged view at C in fig. 2;

FIG. 5 is a schematic view of a partial structure at another view angle of the present invention;

FIG. 6 is a schematic view of the structure of the present invention at the upper rigid half-pipe;

FIG. 7 is a schematic view of the structure of the present invention at the lower rigid half-pipe;

FIG. 8 is a schematic view of the structure of the present invention where copper tubes are bonded.

Reference numerals: the inner crimping copper pipe 1, the upper copper pipe middle hole 1a, the lower copper pipe middle hole 1b, the split core outer flaring hole 1c, the cable core positioning hole 1d, the crimping section 1.1, the crimping surface 1.1a, the raw pipe section 1.2, the tensioning positioning sleeve 101, the sleeve jacking hole 101a, the outer expanding sliding shaft 102, the top half ball head 102.1, the outer expanding half ball head 102.2, the upper rigid half pipe 2, the upper half pipe body 201, the upper semi-ring end plate 202, the upper semi-sealing ring 203, the upper bolt 204, the upper bolt head 204.1, the upper screw 204.2, the upper outer sealing ring 205, the lower rigid half pipe 3, the lower semi-pipe body 301, the lower semi-ring end plate 302, the lower semi-sealing ring 303, the lower bolt 304, the lower bolt head 304.2, the lower outer sealing ring 305, the protection pipe bolt 4, the end ring plate 5, the U-shaped anti-drop device 6, the transverse matching piece 601, the anti-drop piece 602, the guide 603, the upper extending lug 701, the lower extending lug 702, the cable 8, the cable core 801 and the cable cover 802.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

As shown in fig. 1, 2, 3, 4, 5, 6, 7 and 8, the cable butt joint protection structure comprises an inner crimping copper pipe 1 and an outer rigid protection pipe formed by butt joint of an upper rigid half pipe 2 and a lower rigid half pipe 3;

the upper rigid half pipe 2 and the lower rigid half pipe 3 are fixedly connected through a plurality of pipe protection bolts 4, the upper rigid half pipe 2 comprises an upper half pipe body 201, an upper half ring end plate 202 arranged at one end of the upper half pipe body 201 and an upper half ring end plate 202 arranged at the other end of the upper half pipe body 201, the lower rigid half pipe 3 comprises a lower half pipe body 301, a lower half ring end plate 302 arranged at one end of the lower half pipe body 301 and a lower half ring end plate 302 arranged at the other end of the lower half pipe body 301, and sealing strips are arranged at the contact surfaces of the upper half pipe body 201 and the lower half pipe body 301;

the upper half ring end plate 202 corresponds to the lower half ring end plate 302 one by one, and in the corresponding upper half ring end plate 202 and lower half ring end plate 302: an upper half sealing ring 203 in sealing contact with the cable is arranged on the upper half ring end plate 202, a lower half sealing ring 303 in sealing contact with the cable is arranged on the lower half ring end plate 302, the upper half sealing ring 203 and the lower half sealing ring 303 jointly form an end hole sealing ring, the end hole sealing ring is in sealing contact with the sealing strip, and the upper half ring end plate 202 and the lower half ring end plate 302 jointly form an end ring plate 5;

the middle part of the internal pressure copper pipe 1 is provided with an upper copper pipe middle hole 1a and a lower copper pipe middle hole 1b, the upper rigid half pipe 2 is provided with an upper bolt 204 in threaded fit with the upper rigid half pipe 2, the upper bolt 204 comprises an upper bolt head 204.1 positioned outside the outer rigid protection pipe and an upper screw 204.2 in threaded fit with the upper copper pipe middle hole 1a, the lower rigid half pipe 3 is provided with a lower bolt 304 in threaded fit with the lower rigid half pipe 3, and the lower bolt 304 comprises a lower bolt head 304.1 positioned outside the outer rigid protection pipe and a lower screw 304.2 in threaded fit with the lower copper pipe middle hole 1 b.

When two cables are butted, the wire barks of the butted ends of the two cables are stripped by tools such as a wire stripper, a wire stripper and the like to expose cable cores (the cable cores are usually formed by a plurality of copper wire cores in parallel or spirally wound mode), the two cable cores are respectively inserted into the two ends of the internal crimping copper pipe 1, then the two ends and the parts near the two ends of the internal crimping copper pipe 1 are slightly flattened by the crimping pliers respectively, so that the contacted parts of the internal crimping copper pipe 1 and the two cable cores can deform and press the cable cores, and the butt joint of the two cables is completed.

On the inner crimping copper pipe 1, the part flattened by the crimping pliers is a crimping section 1.1, the part not flattened by the crimping pliers is a primary pipe section 1.2, and the two crimping sections 1.1 are respectively positioned at two opposite ends of the primary pipe section 1.2, for one crimping section 1.1: the crimp segment 1.1 has at least one pair of mutually parallel surfaces, i.e. the crimp face 1.1a (the crimp face 1.1a is not necessarily flat, but may have some groove structure, as the surface of the crimp pliers for contacting the object to be crimped may have some relief structure).

After the internal crimping copper pipe 1 is butted (crimped) with two cable cores, the upper rigid half pipe 2 is connected to the internal crimping copper pipe 1 by using the upper bolt 204, that is, the upper bolt 204 is in threaded connection with the upper copper pipe middle hole 1a, and the lower rigid half pipe 3 is connected to the internal crimping copper pipe 1 by using the lower bolt 304, that is, the lower bolt 304 is in threaded connection with the lower copper pipe middle hole 1 b. After the connection is completed, the upper rigid half pipe 2 is placed under the upper and lower rigid half pipes 3, and the upper rigid half pipe 2 and the lower rigid half pipe 3 are further fixed by the respective pipe protection bolts 4 to form an outer rigid pipe, and at this time, the corresponding upper half ring end plate 202 and lower half ring end plate 302 are: the upper half sealing ring 203 on the upper half ring end plate 202 is in butt joint and compression with the lower half sealing ring 303 on the lower half ring end plate 302 to form an end hole sealing ring, and end sealing is realized between the end hole sealing ring and the wire skin of the cable. And sealing strips are arranged at the contact surfaces of the upper half pipe body 201 and the lower half pipe body 301, so that circumferential sealing is formed. The sealing strips and the sealing rings of the end holes isolate the inside and the outside of the outer rigid protective tube together, so that the whole sealing effect is realized.

In the above scheme, firstly, the outer rigid protection tube is not fixed with the cable sheath through the sealing ring, but is deformed and pressed against the cable core through the inner crimping copper tube 1 to realize hard connection, and then the upper bolt 204 and the lower bolt 304 are in threaded connection with the inner crimping copper tube 1 to realize hard connection, so that the end hole sealing ring and the sealing strip only have the sealing effect, and the connecting function is not required to be considered. Therefore, the scheme also avoids the adoption of a soft structure connection mode of the traditional protective sleeve, so that the protective sleeve can be ensured not to move and loose, and the sealing effect can be ensured to be stable.

As shown in fig. 2, 6 and 7, two U-shaped anti-drop devices 6 symmetrically arranged along the axis of the outer rigid protection tube are arranged in the outer rigid protection tube, a plurality of guide rods 603 are arranged in the upper rigid half tube 2, and a plurality of guide rods 603 are arranged in the lower rigid half tube 3;

in one U-shaped fall-off preventer 6: the U-shaped anti-drop device 6 comprises a transverse matching piece 601 and two anti-drop pressing pieces 602 used for pressing a compression joint surface 1.1a of the inner compression joint copper pipe 1, wherein one anti-drop pressing piece 602 is arranged at one end of the transverse matching piece 601, the other anti-drop pressing piece 602 is arranged at the other end of the transverse matching piece 601, and the anti-drop pressing piece 602, an upper copper pipe middle hole 1a and the other anti-drop pressing piece 602 are sequentially arranged along the axial direction of the outer rigid protection pipe;

one U-shaped anti-drop device 6 is in sliding connection with a guide rod 603 arranged in the upper rigid half pipe 2, the U-shaped anti-drop device 6 is in threaded fit with an upper bolt 204, and in the process that the upper bolt head 204.1 of the upper bolt 204 is close to the outer rigid protective pipe, the U-shaped anti-drop device 6 is close to the inner crimping copper pipe 1;

the other U-shaped anti-drop device 6 is in sliding connection with a guide rod 603 arranged in the lower rigid half pipe 3, the U-shaped anti-drop device 6 is in threaded fit with the lower bolt 304, and in the process that the lower bolt head 304.1 of the lower bolt 304 is close to the outer rigid protective pipe, the U-shaped anti-drop device 6 is close to the inner compression joint copper pipe 1.

The axis of the upper bolt 204 is coincident with the axis of the lower bolt 304, and the guide rods 603 are arranged in parallel;

in the upper bolt 204 and the U-shaped anti-drop device 6 in threaded engagement with the upper bolt 204: the upper bolt 204 is in threaded fit with the transverse fitting 601;

in the U-shaped drop-out preventer 6 screw-fitted with the lower bolt 304 and with the lower bolt 304: the lower bolt 304 is screw-engaged with the cross-engaging member 601.

When the inner crimp copper tube 1 is crimped with the cable core by using the crimp pliers, a part of the inner crimp copper tube 1 is formed into crimp segments 1.1 to press the cable core of the cable, for each crimp segment 1.1, one crimp surface 1.1a is ensured to be positioned at the top of the crimp segment 1.1, the crimp surface 1.1a positioned at the top of the crimp segment 1.1 is named as an "upper crimp surface", one crimp surface 1.1a is ensured to be positioned at the bottom of the crimp segment 1.1, and the crimp surface 1.1a positioned at the bottom of the crimp segment 1.1 is named as a "lower crimp surface".

In this scheme, in the process of screwing the upper bolt 204, the U-shaped anti-drop device 6 in threaded fit with the upper bolt 204 also moves down together (the U-shaped anti-drop device 6 is slidably connected with the guide rod 603 disposed in the upper rigid half pipe 2, the principle is similar to a screw-nut mechanism), when the upper bolt 204 moves down to the set position, the U-shaped anti-drop device 6 also moves down to the set position, the two anti-drop components 602 of the U-shaped anti-drop device 6 are respectively pressed on the two "upper press-contact surfaces" of the inner press-contact copper pipe 1, in the same way, in the process of screwing the lower bolt 304, the U-shaped anti-drop device 6 in threaded fit with the lower bolt 304 also moves down together (the U-shaped anti-drop device 6 is slidably connected with the guide rod 603 disposed in the lower rigid half pipe 3), when the lower bolt 304 moves up to the set position, the two anti-drop components 602 of the U-shaped anti-drop device 6 also move down to the set position. Therefore, the upper crimping surface is pressed downwards, the lower crimping surface is pressed upwards, which is equivalent to the fact that the crimping section 1.1 is clamped up and down, so that when the two sides (two ends) of the butt joint of the cable are subjected to large tensile force, large bending force and the like, the cable core of the cable can be prevented from moving and even separating from the crimping section 1.1, and the fixing effect between the internal crimping copper pipe 1 and the cable core is fully ensured.

As shown in fig. 3 and 8, the inner hole of the inner pressure copper pipe 1 is formed by a middle hole, two split-core outer flaring hole channels 1c and two cable core positioning hole channels 1d, a tensioning positioning sleeve 101 is arranged in the middle hole, a sleeve top hole 101a through which a screw 204.2 can pass is arranged on the tensioning positioning sleeve 101, the inner hole of the inner pressure copper pipe 1 is sequentially arranged along the inner pressure copper pipe 1 along the split-core outer flaring hole channel 1c, the inner hole of the tensioning positioning sleeve 101, the other split-core outer flaring hole channel 1c and the other cable core positioning hole channel 1d, two outer flaring sliding shafts 102 which are in one-to-one correspondence with the outer flaring hole channels are arranged on the inner hole of the tensioning positioning sleeve 101, and the corresponding outer flaring hole channels and the outer flaring sliding shafts 102 are arranged in the following manner: one end of the outer expansion sliding shaft 102 is provided with a top half ball head 102.1 which can be pushed by an upper bolt 204, the other end of the outer expansion sliding shaft 102 is provided with an outer expansion half ball head 102.2 which is used for pushing each copper wire core of the cable core into the split core outer flaring duct 1c, and the outer expansion sliding shaft 102 moves towards the split core outer flaring duct 1c in the process that the upper bolt 204.2 contacts the top half ball head 102.1 and the upper bolt head 204.1 approaches the outer rigid protection pipe.

When the compression joint copper pipe 1 is pressed to form the compression joint section 1.1 and press the cable core of the cable, when the two sides (two ends) of the butt joint position of the cable are subjected to a large tensile force, a large bending force and the like, the cable core of the cable and the compression joint section 1.1 can move or even break away. In this scheme, during the screwing process of the upper screw rod 204.2, a certain moment begins, the upper screw rod 204.2 contacts the top half ball head 102.1, after that, the upper screw rod 204.2 continues to screw, the upper screw head 204.1 continues to approach the outer rigid protection tube, during this process, the top half ball head 102.1 is pushed by the upper screw rod 204.2, the top half ball head 102.1, the flared sliding shaft 102, and the flared half ball head 102.2 move together towards the split core outer flared pore canal 1c, so that the flared half ball head 102.2 pushes each copper core (in the foregoing, the cable core of the cable is formed by a plurality of copper core side by side or spirally wound) of the cable core away all around, and the tail end of each copper core is dispersed outwards and enters the split core outer flared pore canal 1c, and is tightly pressed on the side wall of the split core outer flared pore canal 1c by the flared half ball head 102.2. In this way, the "cable core end" is enlarged, and at this time, when the cable core is pulled outwards, the "cable core end" tends to move outwards and separate from the inner crimping copper pipe 1, but in actual situations, the enlarged "cable core end" will be blocked by the middle duct, so that the cable core and the inner crimping copper pipe 1 cannot be loosened. In addition, when the "cable core end" has a tendency to move outward and separate from the inner crimp copper tube 1, theoretically, the inner hole of the crimp section 1.1 of the inner crimp copper tube 1 has a tendency to be squeezed open and spread, but in the foregoing, the "upper crimp surface" is pressed downward, the "lower crimp surface" is pressed upward, which corresponds to the crimp section 1.1 being clamped up and down. Therefore, the inner hole of the compression joint section 1.1 of the internal compression joint copper pipe 1 has the trend of being squeezed open and enlarged, and the inner hole of the compression joint section 1.1 can not be truly squeezed open and enlarged, so the fixation between the internal compression joint copper pipe 1 and the cable core is extremely firm, and the stability is good.

The diameter of the split outer flaring duct 1c is R, the diameter of the cable core positioning duct 1d is R, the diameter of each copper wire core in the cable is M, (R-R) > 0.3M, and in the corresponding outer flaring duct and outer flaring sliding shaft 102: when the upper bolt 204 is moved down to the extreme position, the flared semi-bulb 102.2 is fully within the flared bore.

The upper screw 204.2 is sleeved with an upper outer sealing ring 205, the upper outer sealing ring 205 is positioned outside the outer rigid protection pipe, the vertical projection of the upper outer sealing ring 205 falls in the vertical projection range of the upper screw bolt head 204.1, when the upper screw 204.2 moves down to the limit position, the upper outer sealing ring 205 is pressed on the outer rigid protection pipe by the upper screw bolt head 204.1, the lower screw bolt 304.2 is sleeved with a lower outer sealing ring 305, the lower outer sealing ring 305 is positioned outside the outer rigid protection pipe, the vertical projection of the lower outer sealing ring 305 falls in the vertical projection range of the lower screw bolt head 304.1, and when the lower screw bolt 304.2 moves up to the limit position, the lower outer sealing ring 305 is pressed on the outer rigid protection pipe by the lower screw bolt head 304.1.

The upper outer seal ring 205 may further enhance the sealing effect between the upper bolt head 204.1 and the outer rigid sheath, and the lower outer seal ring 305 may further enhance the sealing effect between the lower bolt head 304.1 and the outer rigid sheath.

As shown in fig. 5, two upper extending lugs 701 are disposed on the outer side of the upper rigid half-pipe 2 and are oppositely disposed along the upper rigid half-pipe 2, two lower extending lugs 702 are disposed on the outer side of the lower rigid half-pipe 3 and are oppositely disposed along the upper rigid half-pipe 2, the upper extending lugs 701 and the lower extending lugs 702 are in one-to-one correspondence, and in the corresponding upper extending lugs 701 and lower extending lugs 702: the upper extending lugs 701 are attached to the lower extending lugs 702, at least one of the guard pipe bolts 4 is in threaded connection with the upper extending lugs 701, and the guard pipe bolts 4 in threaded connection with the upper extending lugs 701 are also in threaded connection with the lower extending lugs 702.

The upper and lower extending lugs 701 and 702 are externally arranged and are matched with the pipe protection bolts 4 to be connected and fixed, so that the upper and lower rigid half pipes 2 and 3 are connected.

The foregoing has outlined rather broadly the more detailed description of embodiments of the invention, wherein the principles and embodiments of the invention are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present invention, the present description should not be construed as limiting the present invention.

Claims (7)

1. The cable butt joint protection structure is characterized by comprising an inner crimping copper pipe (1) and an outer rigid protection pipe formed by butt joint of an upper rigid half pipe (2) and a lower rigid half pipe (3);

the upper rigid half pipe (2) and the lower rigid half pipe (3) are fixedly connected through a plurality of pipe protection bolts (4), the upper rigid half pipe (2) comprises an upper half pipe body (201), an upper semi-ring end plate (202) arranged at one end of the upper half pipe body (201) and an upper semi-ring end plate (202) arranged at the other end of the upper half pipe body (201), the lower rigid half pipe (3) comprises a lower half pipe body (301), a lower semi-ring end plate (302) arranged at one end of the lower half pipe body (301) and a lower semi-ring end plate (302) arranged at the other end of the lower half pipe body (301), and sealing strips are arranged at the contact surfaces of the upper half pipe body (201) and the lower half pipe body (301);

the upper semi-ring end plates (202) and the lower semi-ring end plates (302) are in one-to-one correspondence, and in the corresponding upper semi-ring end plates (202) and lower semi-ring end plates (302): an upper half sealing ring (203) in sealing contact with a cable is arranged on the upper half ring end plate (202), a lower half sealing ring (303) in sealing contact with the cable is arranged on the lower half ring end plate (302), the upper half sealing ring (203) and the lower half sealing ring (303) jointly form an end hole sealing ring, the end hole sealing ring is in sealing contact with a sealing strip, and the upper half ring end plate (202) and the lower half ring end plate (302) jointly form an end ring plate (5);

the middle part of interior compression joint copper pipe (1) is equipped with copper pipe mesopore (1 a) and lower copper pipe mesopore (1 b), be equipped with on the upper rigid half pipe (2) with upper rigid half pipe (2) screw thread complex on bolt (204), on bolt (204) including be in outer rigid protection pipe on bolt head (204.1) and with upper copper pipe mesopore (1 a) screw thread complex on bolt (204.2), be equipped with on lower rigid half pipe (3) with lower rigid half pipe (3) screw thread complex lower bolt (304), lower bolt (304) including be in outer rigid protection pipe outside lower bolt head (304.1) and with lower copper pipe mesopore (1 b) screw thread complex lower bolt (304.2).

2. The cable butt joint protection structure according to claim 1, wherein two U-shaped anti-drop devices (6) symmetrically arranged along the axis of the outer rigid protection tube are arranged in the outer rigid protection tube, a plurality of guide rods (603) are arranged in the upper rigid half tube (2), and a plurality of guide rods (603) are arranged in the lower rigid half tube (3);

in a U-shaped anti-drop device (6): the U-shaped anti-drop device (6) comprises a transverse matching piece (601) and two anti-drop pressing pieces (602) used for pressing a pressing surface (1.1 a) of the inner pressing copper pipe (1), wherein one anti-drop pressing piece (602) is arranged at one end of the transverse matching piece (601), the other anti-drop pressing piece (602) is arranged at the other end of the transverse matching piece (601), and the anti-drop pressing pieces (602), an upper copper pipe middle hole (1 a) and the other anti-drop pressing piece (602) are sequentially arranged along the axial direction of the outer rigid pipe;

one U-shaped anti-drop device (6) is in sliding connection with a guide rod (603) arranged in the upper rigid half pipe (2), the U-shaped anti-drop device (6) is in threaded fit with an upper bolt (204), and in the process that the upper bolt head (204.1) of the upper bolt (204) is close to the outer rigid protective pipe, the U-shaped anti-drop device (6) is close to the inner crimping copper pipe (1);

the other U-shaped anti-drop device (6) is in sliding connection with a guide rod (603) arranged in the lower rigid half pipe (3), the U-shaped anti-drop device (6) is in threaded fit with the lower bolt (304), and the U-shaped anti-drop device (6) is close to the inner crimping copper pipe (1) in the process that the lower bolt head (304.1) of the lower bolt (304) is close to the outer rigid protective pipe.

3. A cable docking protection structure according to claim 2, characterized in that the upper bolt (204) axis coincides with the lower bolt (304) axis, the guide rods (603) being arranged in parallel;

in the upper bolt (204) and the U-shaped anti-drop device (6) in threaded fit with the upper bolt (204): the upper bolt (204) is in threaded fit with the transverse fitting piece (601);

in lower bolt (304) and with lower bolt (304) screw-thread fit's U type anticreep ware (6): the lower bolt (304) is in threaded fit with the transverse fitting piece (601).

4. A cable butt joint protection structure according to claim 1, 2 or 3, wherein the inner hole of the inner pressure joint copper pipe (1) is composed of a middle hole, two split core outer flaring hole channels (1 c) and two cable core positioning hole channels (1 d), a tensioning positioning sleeve (101) is arranged in the middle hole channel, a sleeve jacking hole (101 a) through which a screw (204.2) can pass is arranged on the tensioning positioning sleeve (101), the inner hole of one cable core positioning hole channel (1 d), one split core outer flaring hole channel (1 c), the inner hole of the tensioning positioning sleeve (101), the other split core outer flaring hole channel (1 c) and the other cable core positioning hole channel (1 d) are sequentially arranged along the inner pressure joint copper pipe (1), two outer flaring sliding shafts (102) which are in one-to-one correspondence with the outer flaring hole channels are arranged on the inner hole of the tensioning positioning sleeve (101), and in the corresponding outer flaring hole channels and the outer sliding shafts (102): one end of the outer expansion sliding shaft (102) is provided with a top half ball head (102.1) capable of being jacked by an upper bolt (204), the other end of the outer expansion sliding shaft (102) is provided with an outer expansion half ball head (102.2) for pushing each copper wire core of the cable core into a split core outer flaring duct (1 c), and in the process that the upper screw (204.2) contacts the top half ball head (102.1) and the upper bolt head (204.1) is close to an outer rigid protective tube, the outer expansion sliding shaft (102) moves towards the split core outer flaring duct (1 c).

5. The cable butt-joint protection structure according to claim 4, wherein the diameter of the split-core outer flaring duct (1 c) is R, the diameter of the cable core positioning duct (1 d) is R, the diameter of each copper wire core in the cable is M, (R-R) > 0.3M, and in the corresponding outer flaring duct and outer flaring slide shaft (102): when the upper bolt (204) moves down to the extreme position, the flared semi-spherical head (102.2) is fully within the flared bore.

6. A cable docking protection structure according to claim 1, 2 or 3, characterized in that the upper screw (204.2) is sleeved with an upper outer sealing ring (205), the upper outer sealing ring (205) is located outside the outer rigid protection tube, the vertical projection of the upper outer sealing ring (205) falls within the vertical projection range of the upper bolt head (204.1), when the upper screw (204.2) moves down to the limit position, the upper outer sealing ring (205) is pressed onto the outer rigid protection tube by the upper bolt head (204.1), the lower screw (304.2) is sleeved with a lower outer sealing ring (305), the lower outer sealing ring (305) is located outside the outer rigid protection tube, the vertical projection of the lower outer sealing ring (305) falls within the vertical projection range of the lower bolt head (304.1), and when the lower screw (304.2) moves up to the limit position, the lower outer sealing ring (305) is pressed onto the outer rigid protection tube by the lower bolt head (304.1).

7. A cable docking protection structure according to claim 1, 2 or 3, characterized in that two upper extending lugs (701) are arranged on the outer side of the upper rigid half pipe (2) and are oppositely arranged along the upper rigid half pipe (2), two lower extending lugs (702) are arranged on the outer side of the lower rigid half pipe (3) and are oppositely arranged along the upper rigid half pipe (2), the upper extending lugs (701) are in one-to-one correspondence with the lower extending lugs (702), and the corresponding upper extending lugs (701) are in one-to-one correspondence with the lower extending lugs (702): the upper extending lugs (701) are attached to the lower extending lugs (702), at least one of the protective tube bolts (4) is in threaded fixation with the upper extending lugs (701), and the protective tube bolts (4) in threaded fixation with the upper extending lugs (701) are also in threaded fixation with the lower extending lugs (702).