Holding-out connection cable with curved groove and manufacturing method of pulling-out connection cable

Abstract

The invention belongs to the technical field of electric power, and discloses a pull-out connection cable with a curved groove, which is provided with an accommodating body, a transmission component and a protective sleeve, the containing body is composed of at least two bodies which are parallel, sequentially arranged and combined into a whole, each body is provided with a curve groove extending in the length direction of the body, the protective sleeve is of an integrated structure, a containing cavity is formed between the protective sleeve and the containing body, and the attaching strip of the protective sleeve is attached to the body of the containing body. Each curve groove is internally provided with a transmission part which is distributed along the curve groove in an extending manner, and the uppermost end of the transmission part in each curve groove is located above the first plane; the uppermost end of the transmission part in each curved groove is not in contact with the lower surface of the limiting strip; the transmission member comprises a conductor and an insulating layer covering the conductor, or the transmission member has a structure having at least one optical fiber. The device has the main beneficial effects of simple structure, easiness in manufacturing, high construction efficiency, smaller damage to the cable and longer pull-out connection length.

Description

Technical Field

[0001] The present invention belongs to the field of electric power technology, and particularly relates to a splicing cable with a curved groove and a manufacturing method thereof. Background Art

[0002] With the popularization of power access and fiber optic access to households, the demand for rapid construction is increasing day by day. Requirements are put forward for less damage to the structure of the original cable during construction, construction without cutting the cable, and no impact on the use of other users.

[0003] CN109143516A discloses a sheathed embedded splicing optical cable and a production method thereof, including a sheath, a rigid reinforcing member, a flexible water-blocking reinforcing member, a microtube unit, a colored optical fiber, a first water-blocking element and a second water-blocking element. The first water-blocking element and a plurality of colored optical fibers are externally wrapped with a microtube unit, and a plurality of microtube units and the second water-blocking element are externally and uniformly wrapped with a flexible water-blocking reinforcing member to form a cable core. The cable core is externally wrapped with a sheath, and a plurality of rigid reinforcing members are embedded between the outer surface and the inner surface of the sheath.

[0004] CN219046149U discloses a splicing optical cable convenient for identification, including: an optical fiber sub-cable, which has a plurality of strands, and the plurality of optical fiber sub-cables are twisted around the outer periphery of a central reinforcing member; an outer protective sleeve, which is wrapped around the outer periphery of the plurality of optical fiber sub-cables, and a plurality of color bars for respectively positioning the positions of the optical fiber sub-cables are arranged on the outer wall of the outer protective sleeve, and the colors of the plurality of color bars are different. The splicing optical cable convenient for identification has a plurality of color bars for respectively positioning the positions of the optical fiber sub-cables arranged on the outer wall of the outer protective sleeve, and the colors of the plurality of color bars are different. Due to the identification and positioning of the color bars for each strand of optical fiber sub-cable, the optical fiber sub-cable to be taken out can be quickly found in the cable core. During use, only the optical fiber sub-cable to be spliced needs to be taken out, and it is not necessary to take out all the optical fiber sub-cables. During the splicing process, the probability of fiber breakage is greatly reduced.

[0005] However, the existing splicing optical cables or cables still have the following defects: the length of the cable that can be taken out by a single cut is not enough, the damage to the cable during construction is very large, and the construction efficiency needs to be improved; when cutting the outer skin of the cable during construction, the cable is easily damaged. Summary of the Invention

[0006] To solve the above problems, the object of the present invention is to disclose a splicing cable with a curved groove, and further disclose a manufacturing method of the splicing cable; they are realized by adopting the following technical solutions.

[0007] A splicing cable with a curved groove, comprising a housing, a transmission component, and a protective sleeve. The transmission component consists of a conductor and an insulating layer that wraps the conductor. The housing is composed of at least two bodies that are parallel, arranged in sequence, and integrated. Each body has a curved groove extending along the length direction of the body. The curved groove has a shape of multiple continuous curved segments and does not penetrate the lower surface of the body. The upper surfaces of all the bodies are in a first plane, and the lower surfaces of all the bodies are in a second plane. The first plane is parallel to the second plane. The protective sleeve consists of a limiting strip and at least three fitting strips. The protective sleeve is an integral structure. All the fitting strips extend downward from the lower surface of the limiting strip. The fitting strips are arranged in parallel on the lower surface of the protective sleeve and are perpendicular to the limiting strip. The leftmost fitting strip is located below the left end of the limiting strip, and the rightmost fitting strip is located below the right end of the limiting strip. A cavity is formed between adjacent fitting strips. The lower surface of the leftmost fitting strip is bonded to the upper surface of the left end of the leftmost body, the lower surface of the rightmost fitting strip is bonded to the upper surface of the right end of the rightmost body, and the middle fitting strips are respectively bonded to the upper surfaces of the adjacent joints of the corresponding adjacent bodies below. Each curved groove contains a transmission component extending along the curved groove. The uppermost end of the transmission component in each curved groove is above the first plane. The uppermost end of the transmission component in each curved groove does not contact the lower surface of the limiting strip.

[0008] For the above-mentioned splicing cable with a curved groove, the shape of the curved groove is sinusoidal or cosine-shaped.

[0009] For the above-mentioned splicing cable with a curved groove, a part of the transmission component is inside the corresponding curved groove, and another part of the transmission component is outside the corresponding curved groove. The transmission component outside the curved groove is located in the corresponding cavity and does not contact the limiting strip and the fitting strips that form the cavity.

[0010] For the above-mentioned splicing cable with a curved groove, all the curved grooves are in a parallel distribution state.

[0011] For the above-mentioned splicing cable with a curved groove, the conductor is replaced by at least one optical fiber.

[0012] A method for manufacturing the above-mentioned splicing cable with a curved groove includes the following steps:

[0013] The step of manufacturing the transmission component: Manufacture a sufficient number of transmission components according to the manufacturing method of the prior art and set them aside;

[0014] Steps for manufacturing the accommodating body: The accommodating body is manufactured by one of the following methods. The first method is: The accommodating body is formed by extrusion. An active die core and a fixed die sleeve are arranged in the head. The die sleeve wraps the die core. There is a long hole above the die core, and there is also a long hole above the die sleeve. Above the extrusion head, multiple parallel slide rods with intervals between them are installed. The upper ends of the slide rods are all fixed on the spur gear. The lower ends of the slide rods pass through the long hole above the die sleeve and then through the long hole above the die core. There is an interval between the lower ends of the slide rods and the bottom surface of the die sleeve. The extrusion head extrudes plastic, pulls and stretches it forward, and passes through a cooling water tank with cooling water to form a preliminary accommodating body, and continuously pulls the preliminary accommodating body forward. At the same time, the moving direction of the spur gear is perpendicular to the pulling direction of the preliminary accommodating body. The spur gear is connected to a reciprocating motor installed outside the head. The reciprocating motor makes the spur gear reciprocate by the way of forward rotation-stop-reverse rotation-stop repeating in a cycle, and makes the slide rods form a curve groove on the body. The manufacturing of the accommodating body by the first method is completed. The second method is: Using a sharp slide rod, scrape out a curve groove on a pre-formed body with a rectangular cross-section. Specifically, the slide rod moves vertically relative to the body within a certain stroke range directly above the body. Both the slide rod and the body are moving. A part of the lower end of the slide rod is inserted into the upper surface of the body. The relative movement between the slide rod and the body finally forms a curve groove. The manufacturing of the accommodating body by the second method is completed.

[0015] Steps for placing the transmission component: Take the manufactured transmission component and place it into the curve groove so that the transmission component fits into the curve groove, and a part of the transmission component is located outside the curve groove.

[0016] Steps for installing the protective sleeve: Take the pre-manufactured protective sleeve, apply glue on the lower surface of the fitting strip, press down the protective sleeve so that the lower surface of the fitting strip contacts the upper surface of the accommodating body, and make the lower surface of the leftmost fitting strip of the protective sleeve bond and contact the upper surface of the left end of the leftmost body of the accommodating body; make the lower surface of the rightmost fitting strip of the protective sleeve bond and contact the upper surface of the right end of the rightmost body of the accommodating body; make the lower surface of the middle fitting strip of the protective sleeve bond and contact the upper surface of the adjacent joint of the corresponding adjacent bodies of the accommodating body. The installation of the protective sleeve is completed.

[0017] For the method of manufacturing the splicing cable with a curved groove described above, the step of installing the protective sleeve can also be: taking a prefabricated protective sleeve, making the lower surface of the leftmost fitting strip of the protective sleeve contact with the upper surface of the left end of the leftmost body of the accommodating body; making the lower surface of the rightmost fitting strip of the protective sleeve contact with the upper surface of the right end of the rightmost body of the accommodating body; making the lower surface of the middle fitting strip of the protective sleeve contact with the upper surface of the adjacent joint of the corresponding adjacent bodies of the accommodating body; in the contact state between the protective sleeve and the accommodating body, passing the protective sleeve and the accommodating body together through an ultrasonic welding device in the working state, and keeping the time of the protective sleeve and the accommodating body in the ultrasonic welding device no less than 2 seconds; thus completing the installation of the protective sleeve.

[0018] A splicing cable with a curved groove, the cross-section of the accommodating body is a convex polygon ring, each side of the convex polygon ring is a body, and a curved groove is provided on the body. The curved groove does not penetrate the inner surface of the body, and the curved groove is in a shape of a multi-segment continuous curve. The center of the convex polygon ring is a central cavity, and at least one extending strip extending outward is provided at each outer corner of the convex polygon ring. The protective sleeve is located outside all the extending strips, and the whole protective sleeve covers all the extending strips. The outer ends of the extending strips are connected to the inner wall of the protective sleeve; a cavity is formed between the protective sleeve and each body. A part of the transmission component is in the corresponding curved groove, and another part of the transmission component is outside the corresponding curved groove. The transmission component outside the curved groove is located in the corresponding cavity and does not contact the protective sleeve and the extending strip forming the cavity; the transmission component is composed of a conductor and an insulating layer covering the conductor; or the transmission component is a structure with at least one optical fiber.

[0019] For the splicing cable with a curved groove described in the present application, in the same cable, it can also be that some transmission components have conductors and some transmission components have optical fibers.

[0020] For the splicing cable with a curved groove described above, each outer corner of the convex polygon ring has an extending strip extending outward, and each extending strip extends along the outer edge direction bisecting the angle where the extending strip is located. The cross-section of the cavity is trapezoidal.

[0021] The present application has the following main beneficial technical effects: simple structure, easy to manufacture, higher construction efficiency, less damage to the protective sleeve and the transmission component, and longer splicing length. Description of the Drawings

[0022] Figure 1 It is a top view structural schematic diagram of a section of the accommodating body used in the present application.

[0023] Figure 2 It is a structural schematic diagram of the first embodiment of the present application disassembled in the main view direction.

[0024] Figure 3 Schematic cross-sectional structure diagram of the housing in Embodiment 2.

[0025] Figure 4 Schematic cross-sectional structure diagram of the housing in Embodiment 2 after removing the transmission component. Specific implementation manners

[0026] In order to enable those skilled in the relevant technical field to better understand and implement this patent, the markings in the accompanying drawings will now be described in detail in conjunction with the description of the drawings.

[0027] In the figure: 1 - housing, 2 - transmission component, 3 - protective sleeve, 10 - central cavity, 11 - first body, 12 - second body, 13 - third body, 14 - fourth body, 111 - first curved groove, 121 - second curved groove, 131 - third curved groove, 141 - fourth curved groove, 31 - limiting strip, 321 - first fitting strip, 322 - second fitting strip, 323 - third fitting strip, 324 - fourth fitting strip, 325 - fifth fitting strip, 1A - first cavity, 1B - second cavity, 1C - third cavity, 1D - fourth cavity, 1111 - first extension strip, 1112 - second extension strip, 1211 - third extension strip, 1212 - fourth extension strip, 1311 - fifth extension strip, 1312 - sixth extension strip, 1411 - seventh extension strip, 1412 - eighth extension strip.

[0028] Embodiment 1: Please refer to Figures 1 to 2 , a splicing cable with a curved groove, having a housing 1, a transmission component 2, and a protective sleeve 3. The transmission component 2 is composed of a conductor and an insulating layer that coats the conductor;

[0029] The accommodating body 1 is composed of a first body 11, a second body 12, a third body 13, and a fourth body 14 that are parallel, arranged in sequence, and integrated into one. The first body 11 has a first curved groove 111. The first curved groove 111 extends in a multi-segment continuous curved shape along the length direction of the first body 11, and the first curved groove 111 does not penetrate the lower surface of the first body 11. The second body 12 has a second curved groove 121. The second curved groove 121 extends in a multi-segment continuous curved shape along the length direction of the second body 12, and the second curved groove 121 does not penetrate the lower surface of the second body 12. The third body 13 has a third curved groove 131. The third curved groove 131 extends in a multi-segment continuous curved shape along the length direction of the third body 13, and the third curved groove 131 does not penetrate the lower surface of the third body 13. The fourth body 14 has a fourth curved groove 141. The fourth curved groove 141 extends in a multi-segment continuous curved shape along the length direction of the fourth body 14, and the fourth curved groove 141 does not penetrate the lower surface of the fourth body 14. The upper surfaces of all the bodies are in a first plane, and the lower surfaces of all the bodies are in a second plane. The first plane is parallel to the second plane;

[0030] The protective cover 3 is composed of a limiting strip 31, a first fitting strip 321, a second fitting strip 322, a third fitting strip 323, a fourth fitting strip 324, and a fifth fitting strip 325. The protective cover 3 is an integral structure. The first fitting strip 321 extends downward from the lower surface of the left end of the limiting strip 31, and the fifth fitting strip 325 extends downward from the lower surface of the right end of the limiting strip 31. The second fitting strip 322, the third fitting strip 323, and the fourth fitting strip 324 are arranged in sequence between the first fitting strip 321 and the fifth fitting strip 325. The second fitting strip 322, the third fitting strip 323, and the fourth fitting strip 324 all extend downward from the lower surface of the limiting strip 31. The lower surface of the first fitting strip 321 is bonded to the upper surface of the left end of the first body 11. The lower surface of the second fitting strip 322 is bonded to the upper surface of the right end of the first body 11. The lower surface of the third fitting strip 323 is bonded to the upper surface of the right end of the second body 12. The lower surface of the fourth fitting strip 324 is bonded to the upper surface of the right end of the third body 13. The lower surface of the fifth fitting strip 325 is bonded to the upper surface of the right end of the fourth body 14. A first cavity 1A is formed between the first fitting strip 321 and the second fitting strip 322. A second cavity 1B is formed between the second fitting strip 322 and the third fitting strip 323. A third cavity 1C is formed between the third fitting strip 323 and the fourth fitting strip 324. A fourth cavity 1D is formed between the fourth fitting strip 324 and the fifth fitting strip 325;

[0031] Each curve groove is provided with a transmission component 2 extending along the curve groove, and the uppermost end of the transmission component 2 in each curve groove is above the first plane; the uppermost end of the transmission component 2 in each curve groove does not contact the lower surface of the limiting strip 31.

[0032] In this embodiment, it is not limited to the case where the accommodating body 1 is only composed of the first body 11, the second body 12, the third body 13, and the fourth body 14; it can also be the case of being composed of at least two bodies; correspondingly, the protective sleeve 3 is not limited to only five fitting strips. As long as it can entirely cover all the accommodating bodies 1 from above, a cavity is formed between adjacent fitting strips, the limiting strip can limit the transmission component 2 in the curve groove, and there is sufficient clearance between the limiting strip and the upper surface of the transmission component 2.

[0033] A splicing cable with a curve groove, having an accommodating body, a transmission component, and a protective sleeve. The transmission component is composed of a conductor and an insulating layer that coats the conductor.

[0034] The accommodating body is composed of at least two bodies that are parallel, arranged in sequence, and integrated. Each body has a curve groove extending along the length direction of the body. The curve groove is in a shape of a multi-segment continuous curve, and the curve groove does not penetrate the lower surface of the body. The upper surfaces of all the bodies are in the first plane, and the lower surfaces of all the bodies are in the second plane. The first plane is parallel to the second plane.

[0035] The protective sleeve is composed of a limiting strip and at least three fitting strips. The protective sleeve is an integral structure. All the fitting strips extend downward from the lower surface of the limiting strip. The fitting strips are arranged in parallel on the lower surface of the protective sleeve. The fitting strips are perpendicular to the limiting strip. The leftmost fitting strip is located below the left end of the limiting strip, and the rightmost fitting strip is located below the right end of the limiting strip. A cavity is formed between adjacent fitting strips. The lower surface of the leftmost fitting strip is bonded to the upper surface of the left end of the leftmost body, the lower surface of the rightmost fitting strip is bonded to the upper surface of the right end of the rightmost body, and the middle fitting strips are respectively bonded to the upper surfaces at the adjacent positions of the corresponding adjacent bodies below.

[0036] Each curve groove is provided with a transmission component extending along the curve groove, and the uppermost end of the transmission component 2 in each curve groove is above the first plane; the uppermost end of the transmission component 2 in each curve groove does not contact the lower surface of the limiting strip 31.

[0037] For the above-mentioned splicing cable with a curve groove, the shape of the curve groove is a sine shape or a cosine shape or any other curve shape that is easy to implement; the purpose of the curve groove is to make the length of the transmission component much greater than the length of the body of the accommodating body.

[0038] A butted cable with a curved groove as described above, a part of the transmission component is within the corresponding curved groove, and another part of the transmission component is outside the corresponding curved groove. The transmission component outside the curved groove is located within the corresponding accommodation cavity and does not contact the limiting strip and the fitting strip that form the accommodation cavity.

[0039] Preferably, as shown in Figure 1 , for a butted cable with a curved groove as described above, all the curved grooves are in a parallel distribution state. Here, the so-called parallel means that the corresponding bending directions, radian, etc. are all the same.

[0040] In this embodiment, the transmission component can also be a structure having at least one optical fiber. The so-called structure with at least one optical fiber, for example: it can be a loose tube, which is composed of a tube body and at least one optical fiber located in the holes inside the tube body; it can also be a tight-buffered optical fiber, which is composed of an optical fiber and a coating layer tightly coated outside the optical fiber; it can also be a butterfly unit, which is the butterfly unit described in the communication industry standard YD / T 1997 of the People's Republic of China or any one of the butterfly units disclosed in the prior art; it can also be a single-core or multi-core soft optical cable, and so on, there are many.

[0041] Of course, it can also be that different transmission components are provided in the same cable. For example, some transmission components have conductors inside, and some transmission components have optical fibers inside. In this way, optical and electrical signals can be transmitted simultaneously, which is more suitable for use in smart grids.

[0042] In this application, a cable formed by a transmission component with an optical fiber can also be called a butted optical cable.

[0043] In this application, during construction, by using a tool or the like to cut or tear the corresponding limiting strip directly above the accommodation cavity, the transmission component can be conveniently taken out from the accommodation cavity. Since the transmission component is distributed in a curve, even if a relatively short length of the limiting strip is cut, a relatively long length of the transmission component can be taken out, which is convenient for connection, reduces the stripping length and damage degree of the limiting strip, and improves the construction efficiency.

[0044] A method for manufacturing a butted cable with a curved groove as described above includes the following steps:

[0045] Step of manufacturing the transmission component: Manufacture a sufficient number of transmission components according to the manufacturing method of the prior art and reserve them;

[0046] Steps for manufacturing the housing: The housing is manufactured by one of the following methods. The first method is: The housing is formed by extrusion. An active die core and a fixed die sleeve are arranged in the extrusion head. The die sleeve wraps the die core. A long hole is opened above the die core, and a long hole is also opened above the die sleeve. Above the extrusion head, multiple parallel slide bars with intervals between them are installed. The upper ends of the slide bars are all fixed on the spur gear. The lower ends of the slide bars pass through the long hole above the die sleeve and then through the long hole above the die core. There is an interval between the lower ends of the slide bars and the bottom surface of the die sleeve. The extrusion head extrudes plastic, pulls and stretches it forward, and passes it through a cooling water tank with cooling water to form a preliminary housing. The preliminary housing is continuously pulled forward. At the same time, the movement direction of the spur gear is perpendicular to the pulling direction of the preliminary housing. The spur gear is connected to a reciprocating motor installed outside the head. The reciprocating motor makes the spur gear reciprocate by means of a cycle of forward rotation, stop, reverse rotation, and stop, and makes the slide bars form a curved groove on the body. The manufacturing of the housing by the first method is completed. The second method is: Using a sharp slide bar, a curved groove is scraped out on a pre-formed body with a rectangular cross-section. Specifically, the slide bar moves vertically relative to the body within a certain stroke range directly above the body. Both the slide bar and the body are moving. A part of the lower end of the slide bar is inserted into the upper surface of the body. The relative movement between the slide bar and the body finally forms a curved groove. The manufacturing of the housing by the second method is completed.

[0047] Steps for placing the transmission component: Take the manufactured transmission component and place it into the curved groove so that the transmission component fits into the curved groove, and a part of the transmission component is located outside the curved groove.

[0048] Steps for installing the protective cover: Take the pre-manufactured protective cover, apply adhesive to the lower surface of the fitting strip, press down the protective cover so that the lower surface of the fitting strip contacts the upper surface of the housing, and make the lower surface of the leftmost fitting strip of the protective cover bond and contact the upper surface of the left end of the leftmost body of the housing; make the lower surface of the rightmost fitting strip of the protective cover bond and contact the upper surface of the right end of the rightmost body of the housing; make the lower surface of the middle fitting strip of the protective cover bond and contact the upper surface of the adjacent part of the corresponding adjacent bodies of the housing. The installation of the protective cover is completed.

[0049] The method for manufacturing a spliced cable with a curved groove described above, the step of installing the protective sleeve may also be: taking a prefabricated protective sleeve, making the lower surface of the leftmost fitting strip of the protective sleeve contact the upper surface of the left end of the leftmost body of the accommodating body; making the lower surface of the rightmost fitting strip of the protective sleeve contact the upper surface of the right end of the rightmost body of the accommodating body; making the lower surface of the middle fitting strip of the protective sleeve contact the upper surface of the adjacent joint of the corresponding adjacent bodies of the accommodating body; in the contact state of the protective sleeve and the accommodating body, making the protective sleeve and the accommodating body pass through an ultrasonic welding device in a working state, and the time of the protective sleeve and the accommodating body in the ultrasonic welding device is not less than 2 seconds; the installation of the protective sleeve is completed.

[0050] In this method, since the ultrasonic welding device can quickly heat a suitable plastic but not for a very long time, it is not sufficient to melt the whole, but is locally deformed, softened, but in a bonded state, and the materials of the protective sleeve and the accommodating body in this application are both plastics, so they can be conveniently bonded through the ultrasonic welding device.

[0051] The time of the protective sleeve and the accommodating body in the ultrasonic welding device not less than 2 seconds does not mean that the protective sleeve and the accommodating body stay in the ultrasonic welding device, but are continuously pulled, which is achieved by making the ultrasonic welding device have a sufficient length and the rapid cooperation of the pulling speed.

[0052] Embodiment 2: Please refer to Figures 3 to 4 , and refer to Figure 1 and Figure 2, a butt joint cable with a curved groove. The original shape of the accommodating body 1 is the same as that in Embodiment 1 and is formed by right-angle bending. Finally, the bodies at both ends of the accommodating body 1 are bonded together to form a square cross-section, and a central cavity 10 is formed in the center of the accommodating body 1. In this way, the first body 11, the second body 12, the third body 13, and the fourth body 14 respectively constitute a side wall of the square cylinder. The first curved groove 111, the second curved groove 121, the third curved groove 131, and the fourth curved groove 141 are respectively located on the surfaces of the first body 11, the second body 12, the third body 13, and the fourth body 14. On one end surface of the first body 11, there is a first extension strip 1111 extending vertically outward, and on the other end surface of the first body 11, there is a second extension strip 1112 extending vertically outward. On one end surface of the second body 12, there is a third extension strip 1211 extending vertically outward, and on the other end surface of the second body 12, there is a fourth extension strip 1212 extending vertically outward. On one end surface of the third body 13, there is a fifth extension strip 1311 extending vertically outward, and on the other end surface of the third body 13, there is a sixth extension strip 1312 extending vertically outward. On one end surface of the fourth body 14, there is a seventh extension strip 1411 extending vertically outward, and on the other end surface of the fourth body 14, there is an eighth extension strip 1412 extending vertically outward. The lengths of all the extension strips are equal. The first extension strip 1111 is parallel to and has the same length as the second extension strip 1112. The third extension strip 1211 is parallel to and has the same length as the fourth extension strip 1212. The fifth extension strip 1311 is parallel to and has the same length as the sixth extension strip 1312. The seventh extension strip 1411 is parallel to and has the same length as the eighth extension strip 1412. The second extension strip 1112 is parallel to the fifth extension strip 1311. The third extension strip 1211 is parallel to the seventh extension strip 1411. The second extension strip 1112 is perpendicular to the third extension strip 1211. One end of the first body 11 is connected to one end of the second body 12. One end of the second body 12 is connected to one end of the third body 13. One end of the third body 13 is connected to one end of the fourth body 14. One end of the fourth body 14 is connected to one end of the first body 11. The protective sleeve 3 is located outside all the extension strips, and the protective sleeve 3 entirely covers all the extension strips. The surfaces of the outer ends of the extension strips are all connected to the inner wall of the protective sleeve 3. A first accommodating cavity 1A is formed between the protective sleeve 3 and the first body 11. A second accommodating cavity 1B is formed between the protective sleeve 3 and the second body 12. A third accommodating cavity 1C is formed between the protective sleeve 3 and the third body 13. A fourth accommodating cavity 1D is formed between the protective sleeve 3 and the fourth body 14. A part of the transmission component 2 is in the corresponding curved groove, and another part of the transmission component is outside the corresponding curved groove. The transmission component outside the curved groove is located in the corresponding accommodating cavity and does not contact the protective sleeve and the extension strip forming the accommodating cavity.

[0053] Furthermore, for the above-mentioned splicing cable with a curved groove, the cross-section of the accommodating body can also be other convex polygon rings, preferably regular polygon rings. Each side of the regular polygon ring is a body, and the body has a curved groove. The center of the regular polygon ring is a central cavity. At least one extending strip extends outward at each outer corner of the regular polygon ring. The protective sleeve is located outside all the extending strips, and the protective sleeve entirely covers all the extending strips. The outer ends of the extending strips are connected to the inner wall of the protective sleeve. A cavity is formed between the protective sleeve and each body. A part of the transmission component is in the corresponding curved groove, and another part of the transmission component is outside the corresponding curved groove. The transmission component outside the curved groove is located in the corresponding cavity and does not contact the protective sleeve and the extending strip forming the cavity.

[0054] In this embodiment, at least one extending strip extending outward can be one, or two as in the above specific embodiments, or multiple. When there are multiple, the support is more stable and reliable. When there is one, the preferred way is along the outer edge direction bisecting the angle where the extending strip is located. This structure expands the width of the cavity, making the cavity trapezoidal. In this way, the curved groove will not touch the extending strip forming the cavity even when it is wider, that is, the length of the curved groove in the body within the same length can be longer, the length of the transmission component inside can be longer, and the splicing length can be longer.

[0055] For the splicing cable with a curved groove described in this application, the material of all the bodies is plastic.

[0056] For the splicing cable with a curved groove described in this application, the material of the limiting strip is plastic.

[0057] For the splicing cable with a curved groove described in this application, the material of all the extending strips is plastic.

[0058] For the splicing cable with a curved groove described in this application, the material of the protective sleeve 3 is plastic, preferably cross-linked polyethylene insulation material.

[0059] For the splicing cable with a curved groove described in this application, the material of the conductor is aluminum alloy or copper.

[0060] For the splicing cable with a curved groove described in this application, the material of the insulating layer is plastic.

[0061] For the splicing cable with a curved groove described in this application, the type of the optical fiber is single-mode or multi-mode.

[0062] For the splicing cable with a curved groove described in this application, the optical fiber is a plastic optical fiber or a quartz glass optical fiber.

[0063] In this application, the internal transmission components can be distinguished by the size, color, markings, etc. of the main body, and also by the markings or colors on the protective sleeve. This does not require creative labor and is easily achievable under the inspiration of the prior art, so it is not regarded as the inventive point of this application.

[0064] In this application, the length of the curve groove is increased, so that the length of the transmission components stored in the main body per unit length is longer. Therefore, after the protective sleeve is cut, the transmission components can be conveniently taken out, and a sufficient length of transmission components can be taken out, reducing the damage to the cable during construction. That is, for the same length of transmission components, a shorter protective sleeve can be peeled off. In addition, after the protective sleeve is peeled off, the parts near the cutting position can also be taken out accordingly, increasing the length correspondingly, so the construction efficiency is higher. Moreover, since there is a large gap between the protective sleeve and the main body, when using the planing method, it is not easy to damage the transmission components. Planing means a method similar to using a plane to plane the skin of a loofah or a cucumber.

[0065] This application has the following main beneficial technical effects: simple structure, easy to manufacture, higher construction efficiency, less damage to the protective sleeve and transmission components, and longer splicing length.

[0066] In the cable of this application, the conductor can be aluminum alloy, so it can be called an aluminum alloy power cable. Due to the effective electrical isolation of the main body in the accommodating body, it can transmit very high power levels, so it can also be called a high-voltage and extra-high-voltage cable. The cable in this application can be used in a smart grid, and the materials of the accommodating body and / or the protective sleeve can both be cross-linked polyethylene insulating materials, so it can also be called a cross-linked polyethylene insulated power cable.

[0067] When there is an optical fiber in this application, it can be used as a smart sensor or a smart sensing element. Since it can transmit voice and images, it can also be used as a physical sensor, such as a voice sensor or an image sensor. Since it transmits optical signals through the total reflection principle, it can also be used as a distance sensor. The optical fiber in this application itself is an optical waveguide, so it can be used as an optical waveguide, such as an array optical waveguide or a diffraction optical waveguide. This application can also be used in the field of optical computing, as part of optical computing, optical computing, and optical network computing, such as optical chip computing.

[0068] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A dug-through cable with a curved groove, comprising a housing, a transmission component, and a protective sleeve; characterized in that: The accommodating body is composed of at least two bodies that are parallel, arranged in sequence, and integrated into one. Each body has a curved groove extending along the length direction of the body. The curved groove is in the shape of a multi-segment continuous curve, and the curved groove does not penetrate the lower surface of the body. The upper surfaces of all the bodies are in a first plane, and the lower surfaces of all the bodies are in a second plane. The first plane is parallel to the second plane; the protective sleeve is composed of a limiting strip and at least three fitting strips. The protective sleeve is an integral structure. All the fitting strips extend downward from the lower surface of the limiting strip. The fitting strips are arranged in parallel on the lower surface of the protective sleeve. The fitting strips are perpendicular to the limiting strip. The leftmost fitting strip is located below the left end of the limiting strip, and the rightmost fitting strip is located below the right end of the limiting strip. A receiving cavity is formed between adjacent fitting strips. The lower surface of the leftmost fitting strip is bonded to the upper surface of the left end of the leftmost body, and the lower surface of the rightmost fitting strip is bonded to the upper surface of the right end of the rightmost body. The middle fitting strips are respectively bonded to the upper surfaces of the adjacent joints of the corresponding adjacent bodies below; each curved groove has a transmission component extending and distributed along the curved groove. The uppermost end of the transmission component in each curved groove is above the first plane; the uppermost end of the transmission component in each curved groove does not contact the lower surface of the limiting strip; the transmission component is composed of a conductor and an insulating layer covering the conductor, or the transmission component is a structure having at least one optical fiber.

2. A dug and connected cable with a curved groove according to claim 1, wherein: The shape of the curved groove is sinusoidal or cosine-shaped.

3. The fished cable with a curved groove according to claim 2, wherein: All the curved grooves are in a parallel distribution state.

4. A butted cable with a curved groove according to claim 3, characterized in that: A part of the transmission component is in the corresponding curved groove, and another part of the transmission component is outside the corresponding curved groove. The transmission component outside the curved groove is located in the corresponding receiving cavity and does not contact the limiting strip and the fitting strip forming the receiving cavity.

5. A method for manufacturing a butted cable with a curved groove according to any one of claims 1 to 4, characterized in that: It includes the following steps: The step of manufacturing the transmission component: Manufacture a sufficient number of transmission components according to the manufacturing method of the prior art and set them aside; Steps for manufacturing the accommodating body: The accommodating body is manufactured by one of the following methods. The first method is: The accommodating body is formed by extrusion. An active die core and a fixed die sleeve are arranged in the head. The die sleeve wraps the die core. A long hole is opened above the die core, and a long hole is also opened above the die sleeve. Above the extrusion head, multiple parallel slide bars with intervals between them are installed. The upper ends of the slide bars are all fixed on the spur gear. The lower ends of the slide bars pass through the long hole above the die sleeve and then through the long hole above the die core. There is an interval between the lower ends of the slide bars and the bottom surface of the die sleeve. The extrusion head extrudes plastic, pulls and stretches it forward, and passes it through a cooling water tank with cooling water to form the initial body of the accommodating body, and continuously pulls the initial body of the accommodating body forward. At the same time, the moving direction of the spur gear is perpendicular to the pulling direction of the initial body of the accommodating body. The spur gear is connected to a reciprocating motor installed outside the head. The reciprocating motor makes the spur gear reciprocate in a way of forward rotation-stop-reverse rotation-stop repeated cycle, and makes the slide bars form a curve groove on the body. The manufacturing of the accommodating body by the first method is completed. The second method is: A sharp slide bar is used to scrape out a curve groove on a pre-formed body with a rectangular cross-section. Specifically, the slide bar moves vertically relative to the body within a certain stroke range directly above the body. Both the slide bar and the body are moving. A part of the lower end of the slide bar is inserted into the upper surface of the body. The relative movement between the slide bar and the body finally forms a curve groove. The manufacturing of the accommodating body by the second method is completed. Steps for placing the transmission component: Take the manufactured transmission component and place it into the curve groove so that the transmission component fits into the curve groove, and a part of the transmission component is located outside the curve groove. Steps for installing the protective sleeve: Take the pre-manufactured protective sleeve, apply glue on the lower surface of the fitting strip, press down the protective sleeve so that the lower surface of the fitting strip contacts the upper surface of the accommodating body, and make the lower surface of the leftmost fitting strip of the protective sleeve adhesively contact the upper surface of the left end of the leftmost body of the accommodating body; make the lower surface of the rightmost fitting strip of the protective sleeve adhesively contact the upper surface of the right end of the rightmost body of the accommodating body; make the lower surface of the middle fitting strip of the protective sleeve adhesively contact the upper surface of the adjacent joint of the corresponding adjacent bodies of the accommodating body. The installation of the protective sleeve is completed.

6. A method for manufacturing a butted cable with a curved groove according to claim 5, characterized in that: Steps for installing the protective sleeve are: Take the pre-manufactured protective sleeve, make the lower surface of the leftmost fitting strip of the protective sleeve contact the upper surface of the left end of the leftmost body of the accommodating body; make the lower surface of the rightmost fitting strip of the protective sleeve contact the upper surface of the right end of the rightmost body of the accommodating body; make the lower surface of the middle fitting strip of the protective sleeve contact the upper surface of the adjacent joint of the corresponding adjacent bodies of the accommodating body. In the contact state between the protective sleeve and the accommodating body, make the protective sleeve and the accommodating body pass through an ultrasonic welding device in the working state, and the time for the protective sleeve and the accommodating body in the ultrasonic welding device is not less than 2 seconds. The installation of the protective sleeve is completed.

7. A dug and connected cable with a curved groove, characterized in that: The cross-section of the accommodating body is a convex polygonal ring. Each side of the convex polygonal ring is a body, and there is a curved groove on the body. The curved groove does not penetrate the inner surface of the body. The curved groove is in the shape of a multi-segment continuous curved line. The center of the convex polygonal ring is a central cavity. At each outer corner of the convex polygonal ring, there is at least one extending strip extending outward. The protective sleeve is located outside all the extending strips. The protective sleeve entirely covers all the extending strips. The outer ends of the extending strips are connected to the inner wall of the protective sleeve. A cavity is formed between the protective sleeve and each body. A part of the transmission component is in the corresponding curved groove, and another part of the transmission component is outside the corresponding curved groove. The transmission component outside the curved groove is located in the corresponding cavity and does not contact the protective sleeve and the extending strip that form the cavity. The transmission component is composed of a conductor and an insulating layer that covers the conductor; alternatively, the transmission component is a structure having at least one optical fiber.

8. A butt-jointed cable with a curved groove according to claim 7, characterized in that: At each outer corner of the convex polygonal ring, there is one extending strip extending outward. Each extending strip extends along the outer edge direction bisecting the angle where the extending strip is located. The cross-section of the cavity is trapezoidal.

9. A butted cable with a curved groove according to claim 1 or claim 8, characterized in that: The material of the conductor is aluminum alloy or copper.

10. A butt-connected cable with a curved groove according to claim 1 or claim 8, characterized in that: The material of the protective sleeve is cross-linked polyethylene insulating plastic.

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