A cable mating protection structure

Abstract

The application discloses a cable butt joint protection structure, which can butt joint two cables, can guarantee that the butt joint part is firm, has good sealing effect, is relatively easy to disassemble, and can guarantee that the protection structure of the butt joint part still has good structural stability and sealing property when the protection structure is subjected to a large tensile force, a large bending force and the like. The main structure of the application comprises an inner compression joint copper pipe and an outer rigid protective pipe, the upper rigid half pipe comprises an upper half pipe body and two upper half ring end plates, the lower rigid half pipe comprises a lower half pipe body and two lower half ring end plates, a sealing strip is arranged at the contact surface of the upper half pipe body and the lower half pipe body, an upper half sealing ring is arranged on the upper half ring end plate, a lower half sealing ring is arranged on the lower half ring end plate, the upper half sealing ring and the lower half sealing ring jointly form an end hole sealing ring, the upper half ring end plate and the lower half ring end plate jointly form an end ring plate, the middle part of the inner compression joint 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, and the lower rigid half pipe is provided with a lower bolt.

Description

Technical Field

[0001] This invention belongs to the field of power cable technology, and in particular relates to a cable connection protection structure. Background Technology

[0002] A cable sheath is a protective structure at the cable joint. In electrical engineering, there are frequent situations where two cables need to be joined. When the cores of two cables are joined, there are currently two commonly used protective methods; The first method involves placing a PE protective sleeve (or an insulating protective sleeve made of other materials) over the cable joint for protection. However, to connect the cable cores, the outer sheath (the outer casing of the cable core) at the joint must first be stripped before connection can proceed. Therefore, after connection, the sheath at the joint will be missing and discontinuous. This means that while the PE protective sleeve can provide some protection at the cable joint, it is lacking in tensile strength, torsional strength, and sealing ability.

[0003] The second method involves adding a protective sleeve. Before connecting the two cables, the protective sleeve and related structures are first placed over one of the cables. Then, the cable cores of the two cables are connected. After the connection is complete, the protective sleeve and related structures (sealing structures, locking structures, etc.) are moved so that they pass through the connection point and the entire connection point is ultimately within the moved protective sleeve. Finally, the moved protective sleeve and the cable sheaths of the two cables are secured. For example, this method is used in patent CN111969548. The protective structure in this method is stronger than that in the first method in terms of tensile strength, torsional strength, and sealing ability. However, it also has two obvious drawbacks. First, it is still a "soft structure connection," meaning that the protective sleeve is ultimately fixed to the relatively soft cable sheath. This means that when the two ends of the connection are subjected to large tensile forces or large bending forces, there is still a risk that the protective sleeve may move, loosen, or the seal may fail (once it moves or bends, the sealing effect will naturally decrease significantly or even fail). Second, it cannot be easily removed after the cable is connected. It can only be removed by cutting the cable again or by force, which is inconvenient for subsequent maintenance.

[0004] Note: Generally speaking, many cables used in electrical engineering are relatively thick, and their internal cores (composed of multiple copper wires arranged side by side or spirally wound) are also relatively thick. This is quite different from the 2.5 square millimeter or 4 square millimeter copper wires commonly used in household applications. Moreover, cables are used in diverse and complex environments, such as tunnels, mountains, sandy areas, snowy areas, and areas with strong winds. Therefore, the situations described in the second method above, such as "the joint being subjected to large tensile forces on both sides" or "the joint being subjected to large bending forces," are quite common.

[0005] Additional information: Crimping pliers, also known as crimping machines, are essential tools in the power industry for crimping conductors and related structures during basic construction and maintenance of power lines. They come in manual and automatic versions. Summary of the Invention

[0006] This invention provides a cable splicing protection structure that can splice two cables, ensuring a reliable splice, good sealing effect, and relatively easy disassembly. It also ensures that the protective structure at the splice can maintain good structural stability and sealing performance even when subjected to large tensile or bending forces.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A cable splicing protection structure includes an inner crimped copper tube and an outer rigid protective tube formed by the splicing of an upper rigid half tube and a lower rigid half tube; The upper rigid half-pipe and the lower rigid half-pipe are connected and fixed by a number of protective pipe bolts. The upper rigid half-pipe includes an upper half-pipe body, an upper half-ring end plate at one end of the upper half-pipe body, and an upper half-ring end plate at the other end of the upper half-pipe body. The lower rigid half-pipe includes a lower half-pipe body, a lower half-ring end plate at one end of the lower half-pipe body, and a lower half-ring end plate at the other end of the lower half-pipe body. Sealing strips are provided at the contact surfaces of the upper half-pipe body and the lower half-pipe body. The upper half ring end plate and the lower half ring end plate correspond one-to-one. In the corresponding upper half ring end plate and lower half ring end plate: the upper half ring end plate is provided with an upper half sealing ring that is in sealing contact with the cable, and the lower half ring end plate is provided with a lower half sealing ring that is in sealing contact with the cable. The upper half sealing ring and the lower half sealing ring together form an end hole sealing ring. The end hole sealing ring is in sealing contact with the sealing strip. The upper half ring end plate and the lower half ring end plate together form an end ring plate. The inner pressure-fit copper tube has an upper copper tube central hole and a lower copper tube central hole in its middle part. The upper rigid half tube is provided with an upper bolt that is threadedly engaged with the upper rigid half tube. The upper bolt includes an upper bolt head located outside the outer rigid protective tube and an upper screw threadedly engaged with the central hole of the upper copper tube. The lower rigid half tube is provided with a lower bolt that is threadedly engaged with the lower rigid half tube. The lower bolt includes a lower bolt head located outside the outer rigid protective tube and a lower screw threadedly engaged with the central hole of the lower copper tube.

[0008] Preferably, the outer rigid protective tube is provided with two U-shaped anti-detachment devices symmetrically arranged along the axis of the outer rigid protective tube, the upper rigid half tube is provided with several guide rods, and the lower rigid half tube is provided with several guide rods. In a U-shaped anti-detachment device: the U-shaped anti-detachment device includes a horizontal fitting and two anti-detachment pressing parts for pressing the pressing surface of the inner pressing copper tube. One anti-detachment pressing part is located at one end of the horizontal fitting and the other anti-detachment pressing part is located at the other end of the horizontal fitting. One anti-detachment pressing part, the middle hole of the upper copper tube and the other anti-detachment pressing part are arranged sequentially along the axial direction of the outer rigid protective tube. One of the U-shaped anti-detachment devices is slidably connected to the guide rod located inside the upper rigid half-tube, and the U-shaped anti-detachment device is threadedly engaged with the upper bolt. As the upper bolt head approaches the outer rigid protective tube, the U-shaped anti-detachment device approaches the inner pressure-fit copper tube. Another U-shaped anti-detachment device is slidably connected to the guide rod located inside the lower rigid half-tube, and the U-shaped anti-detachment device is threadedly engaged with the lower bolt. As the lower bolt head approaches the outer rigid protective tube, the U-shaped anti-detachment device approaches the inner pressure-fit copper tube.

[0009] Preferably, the axis of the upper bolt coincides with the axis of the lower bolt, and the guide rods are arranged in parallel. In the upper bolt and the U-shaped anti-loosening device that is threadedly engaged with the upper bolt: the upper bolt is threadedly engaged with the horizontal fitting; In the lower bolt and the U-shaped anti-loosening device that is threaded with the lower bolt: the lower bolt is threaded with the horizontal fitting.

[0010] Preferably, the inner bore of the inner crimped copper tube is composed of a central channel, two flared core channels, and two cable core positioning channels. A tensioning positioning sleeve is provided in the central channel. The tensioning positioning sleeve has a top hole through which the upper screw can pass. One cable core positioning channel, one flared core channel, the inner bore of the tensioning positioning sleeve, another flared core channel, and another cable core positioning channel are arranged sequentially along the axial direction of the inner crimped copper tube. The inner bore of the tensioning positioning sleeve has two outward expansion sliding shafts that correspond one-to-one with the outward expansion channels. In the corresponding outward expansion channels and outward expansion sliding shafts: one end of the outward expansion sliding shaft has a top-loaded hemispherical head that can be pushed by the upper bolt, and the other end of the outward expansion sliding shaft has an outward expansion hemispherical head for pushing each copper core of the cable core into the flared core channel. When the upper screw contacts the top-loaded hemispherical head and the upper bolt head approaches the outer rigid protective tube, the outward expansion sliding shaft moves toward the flared core channel.

[0011] Preferably, the diameter of the outer flare hole is R, the diameter of the cable core positioning hole is r, and the diameter of each copper wire core in the cable is M, (Rr) > 0.3M. In the corresponding outer flare hole and outer flare sliding shaft: when the upper bolt moves down to the limit position, the outer flare hemispherical head is completely inside the outer flare hole.

[0012] Preferably, an upper outer sealing ring is fitted on the upper screw, which is located outside the outer rigid protective tube. The vertical projection of the upper outer sealing ring falls within the vertical projection range of the upper bolt head. When the upper screw moves down to its limit position, the upper outer sealing ring is pressed against the outer rigid protective tube by the upper bolt head. A lower outer sealing ring is fitted on the lower screw, which is located outside the outer rigid protective tube. The vertical projection of the lower outer sealing ring falls within the vertical projection range of the lower bolt head. When the lower screw moves up to its limit position, the lower outer sealing ring is pressed against the outer rigid protective tube by the lower bolt head.

[0013] Preferably, the outer side of the upper rigid half tube is provided with two upper extension ears arranged opposite to each other along the upper rigid half tube, and the outer side of the lower rigid half tube is provided with two lower extension ears arranged opposite to each other along the upper rigid half tube. The upper extension ears and the lower extension ears correspond one to one. In the corresponding upper extension ears and lower extension ears: the upper extension ears and the lower extension ears are in contact with each other, and at least one of the sheath bolts is threadedly fixed to the upper extension ear. The sheath bolt that is threadedly fixed to the upper extension ear is also threadedly fixed to the lower extension ear.

[0014] The beneficial effects of this invention are: it can connect two cables, ensuring a reliable connection, good sealing effect, and relatively easy disassembly; it also ensures that the protective structure at the connection point maintains good structural stability and sealing performance even under large tensile and bending forces; the protective structure at the connection point can also clamp the connection between the inner crimped copper tube and the cable core, preventing loosening between them; it can create an enlarged "cable core end", preventing it from detaching from the outer flared channel of the split core, thereby further ensuring the reliability and stability of the fixation between the inner crimped copper tube and the cable core. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 yes Figure 2 Enlarged view of point B in the middle; Figure 4 yes Figure 2 Enlarged view of point C in the middle; Figure 5 This is a partial structural schematic diagram from another perspective of the present invention; Figure 6 This is a schematic diagram of the structure of the rigid half-tube in this invention; Figure 7 This is a schematic diagram of the structure of the rigid half-tube in this invention; Figure 8 This is a schematic diagram of the internal pressure-fitted copper tube of the present invention.

[0016] Figure reference numerals: 1. Inner crimped copper tube; 1a. Middle hole of upper copper tube; 1b. Middle hole of lower copper tube; 1c. Outer flare channel for core splitting; 1d. Positioning channel for cable core; 1.1. Crimping section; 1.1a. Crimping surface; 1.2. Original tube section; 101. Tensioning positioning sleeve; 101a. Top hole of sleeve; 102. Outer flare sliding shaft; 102.1. Top-loaded hemispherical head; 102.2. Outer flare hemispherical head; 2. Upper rigid half-tube; 201. Upper half-tube body; 202. Upper half-ring end plate; 203. Upper half-sealing ring; 204. Upper bolt; 205. Upper bolt head. 4.1 Upper screw 204.2 Upper outer sealing ring 205 Lower rigid half-pipe 3, Lower half-pipe body 301, Lower half-ring end plate 302, Lower half-sealing ring 303, Lower bolt 304, Lower bolt head 304.1 Lower screw 304.2 Lower outer sealing ring 305, Protective pipe bolt 4, End ring plate 5, U-shaped anti-detachment device 6, Horizontal mating part 601, Anti-detachment pressure part 602, Guide rod 603, Upper extension ear 701, Lower extension ear 702, Cable 8, Cable core 801, Wire sheath 802. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, a cable splicing protection structure includes an inner crimped copper tube 1 and an outer rigid protective tube formed by splicing an upper rigid half tube 2 and a lower rigid half tube 3. The upper rigid half-pipe 2 and the lower rigid half-pipe 3 are connected and fixed by a number of protective pipe bolts 4. The upper rigid half-pipe 2 includes an upper half-pipe body 201, an upper half-ring end plate 202 at one end of the upper half-pipe body 201 and an upper half-ring end plate 202 at the other end of the upper half-pipe body 201. The lower rigid half-pipe 3 includes a lower half-pipe body 301, a lower half-ring end plate 302 at one end of the lower half-pipe body 301 and a lower half-ring end plate 302 at the other end of the lower half-pipe body 301. Sealing strips are provided 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 and the lower half-ring end plate 302 correspond one-to-one. In the corresponding upper half-ring end plate 202 and lower half-ring end plate 302: the upper half-ring end plate 202 is provided with an upper half-sealing ring 203 that is in sealing contact with the cable, and the lower half-ring end plate 302 is provided with a lower half-sealing ring 303 that is in sealing contact with the cable. The upper half-sealing ring 203 and the lower half-sealing ring 303 together form an end hole sealing ring. The end hole sealing ring is in sealing contact with the sealing strip. The upper half-ring end plate 202 and the lower half-ring end plate 302 together form an end ring plate 5. The inner pressure-fit copper tube 1 has an upper copper tube central hole 1a and a lower copper tube central hole 1b in its middle part. The upper rigid half tube 2 is provided with an upper bolt 204 that is threadedly engaged with the upper rigid half tube 2. The upper bolt 204 includes an upper bolt head 204.1 located outside the outer rigid protective tube and an upper screw 204.2 that is threadedly engaged with the upper copper tube central hole 1a. The lower rigid half tube 3 is provided with a lower bolt 304 that is threadedly engaged with the lower rigid half tube 3. The lower bolt 304 includes a lower bolt head 304.1 located outside the outer rigid protective tube and a lower screw 304.2 that is threadedly engaged with the lower copper tube central hole 1b.

[0019] When splicing two cables, use tools such as wire strippers or wire strippers to strip the insulation from the splicing ends of the two cables, exposing the cable cores (which are usually composed of multiple copper wire cores arranged side by side or spirally wound). Insert the two cable cores into the two ends of the inner crimping copper tube 1, and then use crimping pliers to slightly flatten the two ends and the parts near the two ends of the inner crimping copper tube 1, so that the part of the inner crimping copper tube 1 that contacts the two cable cores can deform and press down on the cable cores, thus completing the splicing of the two cables.

[0020] On the inner crimped copper pipe 1, the part that is flattened by the crimping pliers is the crimping section 1.1, and the part that is not flattened by the crimping pliers is the original pipe section 1.2. The two crimping sections 1.1 are located at opposite ends of the original pipe section 1.2. For a crimping section 1.1: the crimping section 1.1 has at least one pair of mutually parallel surfaces, which is the crimping surface 1.1a (the crimping surface 1.1a is not necessarily completely flat, and may also have some groove structure, because the surface of the crimping pliers used to contact the object being crimped may have some uneven structure).

[0021] After the inner crimped copper tube 1 is connected (crimped) to the two cable cores, the upper rigid half tube 2 is connected to the inner crimped copper tube 1 using the upper bolt 204, that is, the upper bolt 204 is threaded into the middle hole 1a of the upper copper tube. The lower rigid half tube 3 is connected to the inner crimped copper tube 1 using the lower bolt 304, that is, the lower bolt 304 is threaded into the middle hole 1b of the lower copper tube. After the connection is completed, the upper rigid half tube 2 is on top and the lower rigid half tube 3 is on the bottom. The upper rigid half tube 2 and the lower rigid half tube 3 are further fixed together using the various protective tube bolts 4 to form an outer rigid protective tube. At this time, in the corresponding upper half ring end plate 202 and lower half ring end plate 302: the upper half sealing ring 203 on the upper half ring end plate 202 and the lower half sealing ring 303 on the lower half ring end plate 302 are mated and pressed together to form an end hole sealing ring. The end hole sealing ring and the cable sheath achieve end sealing. Sealing strips are provided at the contact surfaces of the upper pipe body 201 and the lower pipe body 301, forming a circumferential seal. The sealing strips, together with the sealing rings of each end hole, isolate the inner and outer parts of the outer rigid protective tube, achieving an overall sealing effect.

[0022] In the above solution, firstly, the outer rigid protective tube is no longer fixed to the cable sheath via a sealing ring. Instead, a "rigid connection" is achieved by deforming and pressing the inner crimping copper tube 1 against the cable core. This "rigid connection" is then achieved through threaded connections between the upper bolt 204 and the lower bolt 304 and the inner crimping copper tube 1. At this point, the end-hole sealing ring and sealing strip only serve their primary function of sealing and no longer need to perform a "connection" function. Therefore, this solution avoids the "soft structure connection" method used in traditional protective sleeves. This invention ensures that the protective sleeve will not move or loosen, and also guarantees a stable sealing effect.

[0023] like Figure 2 , Figure 6 , Figure 7 As shown, the outer rigid protective tube is provided with two U-shaped anti-detachment devices 6 arranged symmetrically along the axis of the outer rigid protective tube, the upper rigid half tube 2 is provided with several guide rods 603, and the lower rigid half tube 3 is provided with several guide rods 603. In a U-shaped anti-detachment device 6: the U-shaped anti-detachment device 6 includes a horizontal fitting 601 and two anti-detachment pressing parts 602 for pressing the pressing surface 1.1a of the inner pressing copper tube 1. One anti-detachment pressing part 602 is provided at one end of the horizontal fitting 601, and the other anti-detachment pressing part 602 is provided at the other end of the horizontal fitting 601. One anti-detachment pressing part 602, the middle hole 1a of the upper copper tube and the other anti-detachment pressing part 602 are arranged sequentially along the axial direction of the outer rigid protective tube. One of the U-shaped anti-detachment devices 6 is slidably connected to the guide rod 603 located in the upper rigid half tube 2, and the U-shaped anti-detachment device 6 is threadedly engaged with the upper bolt 204. As the upper bolt head 204.1 of the upper bolt 204 approaches the outer rigid protective tube, the U-shaped anti-detachment device 6 approaches the inner pressure-fit copper tube 1. Another U-shaped anti-detachment device 6 is slidably connected to the guide rod 603 located in the lower rigid half tube 3, and the U-shaped anti-detachment device 6 is threadedly engaged with the lower bolt 304. As the lower bolt head 304.1 of the lower bolt 304 approaches the outer rigid protective tube, the U-shaped anti-detachment device 6 approaches the inner pressure copper tube 1.

[0024] The axis of the upper bolt 204 coincides 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-loosening device 6 that is threadedly engaged with the upper bolt 204: the upper bolt 204 is threadedly engaged with the transverse fitting 601; In the U-shaped anti-loosening device 6 that is threadedly engaged with the lower bolt 304 and the lower bolt 304: the lower bolt 304 is threadedly engaged with the transverse fitting 601.

[0025] When using crimping pliers to crimp the inner crimping copper tube 1 to the cable core, forming a crimping section 1.1 of the inner crimping copper tube 1 to press the cable core, for each crimping section 1.1, ensure that there is a crimping surface 1.1a at the top of the crimping section 1.1, which is named the "upper crimping surface", and ensure that there is a crimping surface 1.1a at the bottom of the crimping section 1.1, which is named the "lower crimping surface".

[0026] In this scheme, during the rotation of the upper bolt 204, the U-shaped anti-loosening device 6, which is threadedly engaged with the upper bolt 204, will also move down together (the U-shaped anti-loosening device 6 is slidably connected to the guide rod 603 located in the upper rigid half-tube 2, similar in principle to a screw and nut mechanism). When the upper bolt 204 moves down to the set position, the U-shaped anti-loosening device 6 also moves down to the set position, and the two anti-loosening pressure pieces 602 of the U-shaped anti-loosening device 6 press on the two "upper pressure surfaces" of the inner pressure copper tube 1 respectively. Similarly, during the rotation of the lower bolt 304, the U-shaped anti-loosening device 6, which is threadedly engaged with the lower bolt 304, will also move down together (the U-shaped anti-loosening device 6 is slidably connected to the guide rod 603 located in the lower rigid half-tube 3). When the lower bolt 304 moves up to the set position, the U-shaped anti-loosening device 6 also moves down to the set position, and the two anti-loosening pressure pieces 602 of the U-shaped anti-loosening device 6 press on the two "lower pressure surfaces" of the inner pressure copper tube 1 respectively. In this way, the "upper crimping surface" is pressed down and the "lower crimping surface" is pressed up, which is equivalent to the crimping section 1.1 being "clamped up and down". This prevents the cable core from moving or even separating from the crimping section 1.1 when the cable joint is subjected to large tensile force on both sides (both ends) or large bending force, thus fully ensuring the fixing effect between the inner crimping copper tube 1 and the cable core.

[0027] like Figure 3 , Figure 8As shown, the inner hole of the inner crimped copper tube 1 is composed of a central channel, two flared core channels 1c, and two cable core positioning channels 1d. A tensioning positioning sleeve 101 is provided inside the central channel. The tensioning positioning sleeve 101 has a top hole 101a through which the upper screw 204.2 can pass. One cable core positioning channel 1d, one flared core channel 1c, the inner hole of the tensioning positioning sleeve 101, another flared core channel 1c, and another cable core positioning channel 1d are arranged sequentially along the axial direction of the inner crimped copper tube 1. Two... The outer expansion slide shaft 102 corresponds one-to-one with the outer expansion channel. In the corresponding outer expansion channel and the outer expansion slide shaft 102: one end of the outer expansion slide shaft 102 is provided with a top-receiving hemispherical head 102.1 that can be pushed by the upper bolt 204, and the other end of the outer expansion slide shaft 102 is provided with an outer expansion hemispherical head 102.2 for pushing each copper wire core of the cable core into the core-separating outer expansion channel 1c. During the process of the upper screw 204.2 contacting the top-receiving hemispherical head 102.1 and the upper bolt head 204.1 approaching the outer rigid protective tube, the outer expansion slide shaft 102 moves towards the core-separating outer expansion channel 1c.

[0028] When the crimping section 1.1 is formed on the inner crimping copper tube 1 and presses down the cable core, the cable core and the crimping section 1.1 may move or even separate when the cable joint is subjected to large tensile force on both sides (both ends) or large bending force. In this scheme, during the tightening process of the upper screw 204.2, at a certain moment, the upper screw 204.2 contacts the top hemispherical head 102.1. After that, the upper screw 204.2 continues to tighten, and the upper screw head 204.1 continues to approach the outer rigid protective tube. During this process, the upper screw 204.2 pushes the top hemispherical head 102.1. The top hemispherical head 102.1, the outward expansion sliding shaft 102, and the outward expansion hemispherical head 102.2 move together toward the core-splitting outward expansion channel 1c. Thus, the outward expansion hemispherical head 102.2 pushes each copper core of the cable core (as mentioned earlier, the cable core is composed of multiple copper cores arranged side by side or spirally wound) to the surrounding area. The ends of each copper core disperse outward and enter the core-splitting outward expansion channel 1c, and are tightly pressed against the side wall of the core-splitting outward expansion channel 1c by the outward expansion hemispherical head 102.2. In this way, the "cable core end" is effectively enlarged. When the cable core is subjected to outward tension, the "cable core end" tends to move outward and detach from the inner crimping copper tube 1. However, in reality, the enlarged "cable core end" is blocked by the central channel, preventing loosening between the cable core and the inner crimping copper tube 1. Furthermore, when the "cable core end" tends to move outward and detach from the inner crimping copper tube 1, theoretically, the inner hole of the crimping section 1.1 of the inner crimping copper tube 1 should be squeezed open and enlarged. However, as mentioned earlier, the "upper crimping surface" is pressed downward and the "lower crimping surface" is pressed upward, effectively clamping the crimping section 1.1 "from both top and bottom." Therefore, the tendency for the inner hole of the crimping section 1.1 of the inner crimping copper tube 1 to be squeezed open and enlarged does not actually result in the actual opening and enlargement of the inner hole. Thus, the fixation between the inner crimping copper tube 1 and the cable core is extremely secure and exhibits excellent stability.

[0029] The diameter of the outer flared channel 1c is R, the diameter of the cable core positioning channel 1d is r, and the diameter of each copper wire core in the cable is M, (Rr) > 0.3M. In the corresponding outer flared channel and outer flared sliding shaft 102: when the upper bolt 204 moves down to the limit position, the outer flared hemispherical head 102.2 is completely inside the outer flared channel.

[0030] An upper outer sealing ring 205 is fitted onto the upper screw 204.2. The upper outer sealing ring 205 is located outside the outer rigid protective 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 its limit position, the upper outer sealing ring 205 is pressed against the outer rigid protective tube by the upper bolt head 204.1. A lower outer sealing ring 305 is fitted onto the lower screw 304.2. The lower outer sealing ring 305 is located outside the outer rigid protective tube. The vertical projection of the lower outer sealing ring 305 falls within the vertical projection range of the lower bolt head 304.1. When the lower screw 304.2 moves up to its limit position, the lower outer sealing ring 305 is pressed against the outer rigid protective tube by the lower bolt head 304.1.

[0031] The upper outer sealing ring 205 can further enhance the sealing effect between the upper bolt head 204.1 and the outer rigid protective tube, and the lower outer sealing ring 305 can further enhance the sealing effect between the lower bolt head 304.1 and the outer rigid protective tube.

[0032] like Figure 5 As shown, the outer side of the upper rigid half-tube 2 is provided with two upper extension ears 701 arranged opposite to each other along the upper rigid half-tube 2, and the outer side of the lower rigid half-tube 3 is provided with two lower extension ears 702 arranged opposite to each other along the upper rigid half-tube 2. The upper extension ears 701 and the lower extension ears 702 correspond one to one. In the corresponding upper extension ears 701 and lower extension ears 702: the upper extension ears 701 and the lower extension ears 702 are in contact, and at least one of the protective tube bolts 4 is threadedly fixed to the upper extension ears 701. The protective tube bolts 4 threadedly fixed to the upper extension ears 701 are also threadedly fixed to the lower extension ears 702.

[0033] The upper rigid half-pipe 2 and the lower rigid half-pipe 3 are connected and fixed by external upper extension ears 701 and lower extension ears 702 in conjunction with each protective pipe bolt 4.

[0034] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A cable connection protection structure, characterized in that, It includes an inner press-fit copper tube (1) and an outer rigid protective tube formed by the butt joint of an upper rigid half tube (2) and a lower rigid half tube (3); The upper rigid half-pipe (2) and the lower rigid half-pipe (3) are connected and fixed by a number of protective pipe bolts (4). The upper rigid half-pipe (2) includes an upper half-pipe body (201), an upper half-ring end plate (202) at one end of the upper half-pipe body (201) and an upper half-ring end plate (202) at the other end of the upper half-pipe body (201). The lower rigid half-pipe (3) includes a lower half-pipe body (301), a lower half-ring end plate (302) at one end of the lower half-pipe body (301) and a lower half-ring end plate (302) at the other end of the lower half-pipe body (301). Sealing strips are provided 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) and the lower half-ring end plate (302) correspond one-to-one. In the corresponding upper half-ring end plate (202) and lower half-ring end plate (302): the upper half-ring end plate (202) is provided with an upper half-sealing ring (203) that is in sealing contact with the cable, and the lower half-ring end plate (302) is provided with a lower half-sealing ring (303) that is in sealing contact with the cable. The upper half-sealing ring (203) and the lower half-sealing ring (303) together constitute an end hole sealing ring. The end hole sealing ring is in sealing contact with the sealing strip. The upper half-ring end plate (202) and the lower half-ring end plate (302) together constitute an end ring plate (5). The inner pressure-fit copper tube (1) is provided with an upper copper tube central hole (1a) and a lower copper tube central hole (1b) in the middle. The upper rigid half tube (2) is provided with an upper bolt (204) that is threadedly engaged with the upper rigid half tube (2). The upper bolt (204) includes an upper bolt head (204.1) located outside the outer rigid protective tube and an upper screw (204.2) that is threadedly engaged with the upper copper tube central hole (1a). The lower rigid half tube (3) is provided with a lower bolt (304) that is threadedly engaged with the lower rigid half tube (3). The lower bolt (304) includes a lower bolt head (304.1) located outside the outer rigid protective tube and a lower screw (304.2) that is threadedly engaged with the lower copper tube central hole (1b). The outer rigid protective tube is provided with two U-shaped anti-detachment devices (6) symmetrically arranged along the axis of the outer rigid protective tube. The upper rigid half tube (2) is provided with several guide rods (603), and the lower rigid half tube (3) is provided with several guide rods (603). In one U-shaped anti-detachment device (6): the U-shaped anti-detachment device (6) includes a horizontal fitting (601) and two anti-detachment pressing parts (602) for pressing the pressing surface (1.1a) of the inner pressing copper tube (1). One anti-detachment pressing part (602) is located at one end of the horizontal fitting part (601), and the other anti-detachment pressing part (602) is located at the other end of the horizontal fitting part (601). One anti-detachment pressing part (602), the middle hole (1a) of the upper copper tube and the other anti-detachment pressing part (602) are arranged sequentially along the axial direction of the outer rigid protective tube.

2. The cable connection protection structure according to claim 1, characterized in that, One of them The U-shaped anti-detachment device (6) is slidably connected to the guide rod (603) located in the upper rigid half tube (2), and the U-shaped anti-detachment device (6) is threadedly engaged with the upper bolt (204). As the upper bolt head (204.1) of the upper bolt (204) approaches the outer rigid protective tube, the U-shaped anti-detachment device (6) approaches the inner pressure copper tube (1). Another U-shaped anti-detachment device (6) is slidably connected to the guide rod (603) located in the lower rigid half tube (3), and the U-shaped anti-detachment device (6) is threadedly engaged with the lower bolt (304). As the lower bolt head (304.1) of the lower bolt (304) approaches the outer rigid protective tube, the U-shaped anti-detachment device (6) approaches the inner pressure copper tube (1).

3. The cable connection protection structure according to claim 2, characterized in that, The axis of the upper bolt (204) coincides 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-loosening device (6) that is threadedly engaged with the upper bolt (204): the upper bolt (204) is threadedly engaged with the transverse fitting (601); In the lower bolt (304) and the U-shaped anti-loosening device (6) that is threadedly engaged with the lower bolt (304): the lower bolt (304) is threadedly engaged with the transverse fitting (601).

4. A cable connection protection structure according to claim 1, 2, or 3, characterized in that, The inner bore of the inner crimped copper tube (1) consists of a central channel, two flared core channels (1c), and two cable core positioning channels (1d). A tensioning positioning sleeve (101) is provided within the central channel. The tensioning positioning sleeve (101) has a top hole (101a) through which the upper screw (204.2) can pass. One cable core positioning channel (1d), one flared core channel (1c), the inner bore of the tensioning positioning sleeve (101), another flared core channel (1c), and another cable core positioning channel (1d) are arranged sequentially along the axial direction of the inner crimped copper tube (1). Two tensioning positioning sleeves (101) have two... The outer expansion slide shaft (102) corresponds one-to-one with the outer expansion channel. In the corresponding outer expansion channel and the outer expansion slide shaft (102): one end of the outer expansion slide shaft (102) is provided with a top-loaded hemispherical head (102.1) that can be pushed by the upper bolt (204). The other end of the outer expansion slide shaft (102) is provided with an outer expansion hemispherical head (102.2) for pushing each copper wire core of the cable core into the core-separating outer expansion channel (1c). During the process of the upper screw (204.2) contacting the top-loaded hemispherical head (102.1) and the upper bolt head (204.1) approaching the outer rigid protective tube, the outer expansion slide shaft (102) moves towards the core-separating outer expansion channel (1c).

5. The cable connection protection structure according to claim 4, characterized in that, The diameter of the outer flared channel (1c) is R, the diameter of the cable core positioning channel (1d) is r, and the diameter of each copper wire core in the cable is M, (Rr) > 0.3M. In the corresponding outer flared channel and outer flared sliding shaft (102): when the upper bolt (204) moves down to the limit position, the outer flared hemispherical head (102.2) is completely inside the outer flared channel.

6. A cable connection protection structure according to claim 1, 2, or 3, characterized in that, An upper outer sealing ring (205) is fitted on the upper screw (204.2). The upper outer sealing ring (205) is located outside the outer rigid protective 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 against the outer rigid protective tube by the upper bolt head (204.1). A lower outer sealing ring (305) is fitted on the lower screw (304.2). The lower outer sealing ring (305) is located outside the outer rigid protective tube. The vertical projection of the lower outer sealing ring (305) falls within the vertical projection range of the lower bolt head (304.1). When the lower screw (304.2) moves up to the limit position, the lower outer sealing ring (305) is pressed against the outer rigid protective tube by the lower bolt head (304.1).

7. A cable connection protection structure according to claim 1, 2, or 3, characterized in that, The upper rigid half-tube (2) is provided with two upper extension ears (701) arranged opposite to each other along the upper rigid half-tube (2), and the lower rigid half-tube (3) is provided with two lower extension ears (702) arranged opposite to each other along the upper rigid half-tube (2). The upper extension ears (701) and the lower extension ears (702) correspond one to one. In the corresponding upper extension ears (701) and lower extension ears (702): the upper extension ears (701) and the lower extension ears (702) are in contact, at least one of the tube bolts (4) is threaded to the upper extension ears (701), and the tube bolts (4) threaded to the upper extension ears (701) are also threaded to the lower extension ears (702).

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