High-strength multi-cable-core control cable

Abstract

The invention discloses a high-strength multi-cable-core control cable which sequentially comprises an outer protection layer, an armor layer, a first shielding layer and a flame-retardant belt wrapping layer from outside to inside, a plurality of support units, a plurality of first cable cores, a plurality of second cable cores and a plurality of third cable cores are arranged in the flame-retardant belt wrapping layer, each first cable core penetrates through all the support units, and each second cable core penetrates through all the third cable cores. Each second cable core penetrates through all the support units, and each third cable core penetrates through all the support units. According to the control cable provided by the invention, the installation of a plurality of cable cores can be realized, so that the installation requirements of more control cables can be met. And the skeleton unit is arranged, and meanwhile, the bracket unit is arranged, so that the strength of the control cable is improved. And the temperature measuring optical fiber is installed, so that the internal temperature measurement of the control cable can be realized, and when the internal temperature is abnormal, the abnormal internal temperature can be detected, so that the maintenance personnel can deal with the abnormal condition in time. Moreover, the monitoring of the pressed or over-bending condition of the control cable can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and more specifically, to a high-strength multi-core control cable. Background Art

[0002] Control cables are applicable to occasions such as industrial and mining enterprises, energy and transportation departments, etc., and are used for transmitting control signals of low-voltage currents and wiring of measurement systems. Control cables can connect various electrical appliances, instruments, meters, and automatic devices to achieve the transmission of electrical energy signals such as starting, operating, controlling, signal display, and measurement.

[0003] Existing control cables often have a relatively single design, and the number and layout of cable cores are difficult to meet diverse installation requirements. In some complex control systems or large-scale engineering projects, a large number of control cables may need to be installed, but the design of traditional cables often limits the installation quantity and flexibility. Some control cables have deficiencies in mechanical strength and are easily damaged or worn by external forces, resulting in a decline in cable performance. When the cable is compressed or overly bent, its insulating layer may be damaged, and the conductor may also be deformed, thus affecting the performance and service life of the cable. However, cables often lack the monitoring function for the situation of being compressed or overly bent, making it difficult to detect and handle these problems in a timely manner. Some control cables also do not have the internal temperature measurement function, which makes it difficult for maintenance personnel to detect the abnormal temperature inside the cable in a timely manner. Summary of the Invention

[0004] The present invention aims to overcome the defects of the prior art and provides a high-strength multi-core control cable.

[0005] To achieve the above object, the present invention provides the following technical solution: A control cable, which sequentially includes an outer sheath, an armor layer, a first shielding layer, and a flame-retardant tape winding layer from outside to inside. The flame-retardant tape winding layer is internally provided with a plurality of support units, a plurality of first cable cores, a plurality of second cable cores, and a plurality of third cable cores. Each first cable core passes through all the support units, each second cable core passes through all the support units, and each third cable core passes through all the support units.

[0006] Further, the plurality of support units are evenly distributed at equal intervals.

[0007] Further, the length of the support unit is greater than or equal to 20 cm.

[0008] Further, the interval between adjacent support units is less than 1 meter.

[0009] Further, the bracket unit includes two first brackets, two second brackets, and two third brackets. The first bracket includes a first inner surrounding portion and a first outer surrounding portion. The first inner surrounding portion includes a first inner arc panel, and the first outer surrounding portion includes a plurality of first outer arc panels. Adjacent two first outer arc panels are connected by an arc-shaped first mounting plate, and one first cable core is installed at each first mounting plate. Each first mounting plate of the first bracket is connected to the first inner arc panel; the second bracket includes a second inner surrounding portion and a second outer surrounding portion. The second inner surrounding portion includes a plurality of second inner arc panels, and an arc-shaped first covering plate is connected between adjacent two second inner arc panels. One first cable core is provided at each first covering plate. The second outer surrounding portion includes a plurality of second outer arc panels, and an arc-shaped second mounting plate or an arc-shaped third mounting plate is connected between adjacent two second outer arc panels. The second mounting plates and the third mounting plates of the second outer surrounding portion are alternately distributed. Each second mounting plate of the second bracket is connected to a second inner arc panel, one second cable core is installed at each second mounting plate, and one third cable core is installed at each third mounting plate. An arc-shaped inner end connecting plate is connected between the end of the second inner surrounding portion and the end of the second outer surrounding portion; the third bracket includes a third inner surrounding portion and a third outer surrounding portion. The third inner surrounding portion includes a plurality of third inner arc panels, and a second covering plate or a third covering plate is connected between adjacent two third inner arc panels. The second covering plates and the third covering plates of the third inner surrounding portion are alternately distributed. The third outer surrounding portion includes a plurality of third outer arc panels, and an arc connecting plate is connected between adjacent two third outer arc panels. Each second covering plate is connected to a third outer arc panel, and each third covering plate is connected to an arc connecting plate. An arc-shaped outer end connecting plate is connected between the end of the third surrounding portion and the end of the fourth surrounding portion. One second cable core is provided at each second covering plate, and one third cable core is provided at each third covering plate.

[0010] Further, for each bracket unit, each first cable core is surrounded by a first mounting plate and a first covering plate.

[0011] Further, for each bracket unit, each second cable core is surrounded by a second mounting plate and a second covering plate.

[0012] Further, for each bracket unit, each third cable core is surrounded by a third mounting plate and a third covering plate.

[0013] Further, the cross-sectional corresponding radian of the first mounting plate is greater than 180 degrees; the cross-sectional corresponding radian of the second mounting plate is greater than 180 degrees; the cross-sectional corresponding radian of the third mounting plate is greater than 180 degrees.

[0014] Thus, the first cable core can be embedded in the first mounting plate, the second cable core can be embedded in the second mounting plate, and the third cable core can be embedded in the third mounting plate, facilitating the installation of the first, second, and third cable cores.

[0015] Further, the first bracket, the second bracket, and the third bracket are all made of a heat-conductive metal material.

[0016] Further, the first bracket, the second bracket, and the third bracket are all made of copper-aluminum alloy.

[0017] Thus, the temperature inside the cable can be better transferred to the bracket unit and detected by the temperature-measuring optical fiber.

[0018] Further, the first cable core includes a first conductor and a first insulating layer; the second cable core includes a second conductor and a second insulating layer; the third cable core includes a third conductor and a third insulating layer.

[0019] Further, the first shielding layer is made of a copper wire braided shielding layer.

[0020] Further, each first bracket includes five first mounting plates, each second bracket includes five first covering plates, four second mounting plates, five third mounting plates, and two inner end connecting plates, and each third bracket includes four second covering plates, five third covering plates, and two outer end connecting plates.

[0021] Further, the control cable includes 10 first cable cores, 8 second cable cores, and 10 third cable cores.

[0022] Further, the third bracket includes 6 third outer arc panels and 5 arc connecting plates.

[0023] Further, it further includes two fourth cable cores. The fourth cable core includes an inner sheath and a second shielding layer from outside to inside. There is a core wire inside the second shielding layer. The core wire includes a fourth insulating layer and a fourth conductor. One side of the inner sheath has two inner protruding parts, and the other side has two outer protruding parts; the inner end connecting plate is fixedly connected with an inner convex block, and there is an inner embedding groove matching with the inner protruding part at the inner convex block. The outer end connecting plate is fixedly connected with an outer convex block, and there is an outer embedding groove matching with the outer protruding part at the outer convex block. Each fourth cable core is wrapped by two inner end connecting plates and two outer end connecting plates of the bracket unit.

[0024] Further, the cross-section of the inner sheath has two opposite first arcs and two opposite first straight lines.

[0025] Further, it also includes a skeleton unit and two temperature-measuring optical fibers. The skeleton unit passes through all the support units. Support bumps are fixed on both sides of the first inner arc panel. The side surface of the support bump has a plurality of limit grooves, and the end surface of the support bump has a mounting groove for mounting the temperature-measuring optical fiber. The skeleton unit is surrounded by two first inner arc panels of each support unit. The skeleton unit includes a first skeleton and a second skeleton. Both side surfaces of the first skeleton have a plurality of limit protrusions that cooperate with the limit grooves. The first skeleton also has a receiving groove extending along the length direction of the control cable. The second skeleton is installed in the receiving groove. The receiving groove has two first optical fiber grooves, and the second skeleton has two second optical fiber grooves. The two first optical fiber grooves and the two second optical fiber grooves correspond one by one. The corresponding first optical fiber groove and the second optical fiber groove are spliced into an optical fiber groove part, and the optical fiber of the fiber pressure sensor is installed in the optical fiber groove part.

[0026] Further, the control cable includes the optical fibers of two fiber pressure sensors.

[0027] Further, the first skeleton has 8 limit protrusions, and each side surface of the support bump has 2 limit grooves.

[0028] Further, both the first skeleton and the second skeleton are of hollow structures.

[0029] Further, both the first skeleton and the second skeleton are made of nylon material or both are made of PVC material.

[0030] Beneficial effects: 1. The control cable of the present application can realize the installation of multiple cable cores, so as to meet the installation requirements of more control cables.

[0031] 2. The control cable of the present application is provided with a skeleton unit, and by setting the support unit, the strength of the control cable is improved.

[0032] 3. The control cable of the present application is installed with a temperature-measuring optical fiber, so that the internal temperature of the control cable can be measured. When the internal temperature is abnormal, it can be detected, so that maintenance personnel can handle the abnormality in time.

[0033] 4. The control cable of the present application can realize the monitoring of the compression or excessive bending of the control cable. Description of the drawings

[0034] Figure 1 It is a schematic cross-sectional view of the control cable; Figure 2 It is an enlarged view of area A; Figure 3 It is a schematic diagram of the control cable; Figure 4 It is an enlarged view of area B; Figure 5 It is an enlarged view of area C; Figure 6 It is a schematic diagram of the separated cross-section of the control cable component; Figure 7 It is an enlarged view of area D; Figure 8 It is an enlarged view of area E; Figure 9 It is an enlarged view of area F; Figure 10 It is an enlarged view of area G; Figure 11 It is a schematic diagram of the separation of the control cable component; Figure 12 It is an enlarged view of area H; Figure 13 It is an enlarged view of area I.

[0035] Explanation of reference numerals in the drawings: Outer sheath 1; Armor layer 2; First shielding layer 3; Flame-retardant tape wrapping layer 4; First bracket 5; First inner arc panel 5.1; First outer arc panel 5.2; First mounting plate 5.3; Support bump 5.4; Limit groove 5.5; Second bracket 6; Second inner arc panel 6.1; First cover plate 6.2; Second outer arc panel 6.3; Second mounting plate 6.4; Third mounting plate 6.5; Inner end connecting plate 6.6; Inner bump 6.7; Inner embedding groove 6.8; Third bracket 7; Third inner arc panel 7.1; Second cover plate 7.2; Third cover plate 7.3; Third outer arc panel 7.4; Arc surface connecting plate 7.5; Outer end connecting plate 7.6; Outer bump 7.7; Outer embedding groove 7.8; First cable core 8; First conductor 8.1; First insulating layer 8.2; Second cable core 9; Second conductor 9.1; Second insulating layer 9.2; Third cable core 10; Third conductor 10.1; Third insulating layer 10.2; Fourth cable core 11; Inner sheath 11.1; Second shielding layer 11.2; Fourth insulating layer 11.3; Fourth conductor 11.4; Inner protrusion 11.5; Outer protrusion 11.6; Temperature-measuring optical fiber 12; First skeleton 13; Limit protrusion 13.1; Accommodating groove 13.2; First optical fiber groove 13.3; Second skeleton 14; Optical fiber 15 of the pressure optical fiber sensor. Detailed implementation manners

[0036] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0037] The present invention provides a high-strength multi-core control cable as shown in the figure, which sequentially includes an outer sheath 1, an armor layer 2, a first shielding layer 3, and a flame-retardant tape wrapping layer 4 from outside to inside. The flame-retardant tape wrapping layer 4 has a plurality of support units, a plurality of first cable cores 8, a plurality of second cable cores 9, and a plurality of third cable cores 10. Each first cable core 8 passes through all the support units, each second cable core 9 passes through all the support units, and each third cable core 10 passes through all the support units. The support unit includes two first supports 5, two second supports 6, and two third supports 7. The first support 5 includes a first inner surrounding portion and a first outer surrounding portion. The first inner surrounding portion includes a first inner arc panel 5.1, and the first outer surrounding portion includes a plurality of first outer arc panels 5.2. Adjacent two first outer arc panels 5.2 are connected by an arc-shaped first mounting plate 5.3. One of the first cable cores 8 is installed at each first mounting plate 5.3, and each first mounting plate 5.3 of the first support is connected to the first inner arc panel 5.1. The second support 6 includes a second inner surrounding portion and a second outer surrounding portion. The second inner surrounding portion includes a plurality of second inner arc panels 6.1, and an arc-shaped first covering plate 6.2 is connected between adjacent two second inner arc panels 6.1. One of the first cable cores 8 is located at each first covering plate. The second outer surrounding portion includes a plurality of second outer arc panels 6.3, and an arc-shaped second mounting plate 6.4 or an arc-shaped third mounting plate 6.5 is connected between adjacent two second outer arc panels 6.3. The second mounting plates 6.4 and the third mounting plates 6.5 of the second outer surrounding portion are alternately distributed. Each second mounting plate 6.4 of the second support is connected to one of the second inner arc panels 6.1, one of the second cable cores 9 is installed at each second mounting plate 6.4, and one of the third cable cores 10 is installed at each third mounting plate 6.5. An arc-shaped inner end connecting plate 6.6 is connected between the end of the second inner surrounding portion and the end of the second outer surrounding portion. The third support 7 includes a third inner surrounding portion and a third outer surrounding portion. The third inner surrounding portion includes a plurality of third inner arc panels 7.1, and a second covering plate 7.2 or a third covering plate 7.3 is connected between adjacent two third inner arc panels 7.1. The second covering plates 7.2 and the third covering plates 7.3 of the third inner surrounding portion are alternately distributed. The third outer surrounding portion includes a plurality of third outer arc panels 7.4, and an arc connecting plate 7.5 is connected between adjacent two third outer arc panels 7.4. Each second covering plate 7.2 is connected to one of the third outer arc panels 7.4, and each third covering plate 7.3 is connected to one of the arc connecting plates 7.5. An arc-shaped outer end connecting plate 7.6 is connected between the end of the third surrounding portion and the end of the fourth surrounding portion. One of the second cable cores 9 is located at each second covering plate 7.2, and one of the third cable cores 10 is located at each third covering plate 7.3.

[0038] The first cable core 8 includes a first conductor 8.1 and a first insulating layer 8.2; the second cable core 9 includes a second conductor 9.1 and a second insulating layer 9.2; the third cable core 10 includes a third conductor 10.1 and a third insulating layer 10.2. Each first bracket includes five first mounting plates 5.3, each second bracket includes five first covering plates 6.2, four second mounting plates 6.4, five third mounting plates 6.5 and two inner end connecting plates 6.6, and each third bracket includes four second covering plates 7.2, five third covering plates 7.3 and two outer end connecting plates 7.6; the control cable includes 10 first cable cores 8, 8 second cable cores 9 and 10 third cable cores 10. The control cable further includes two fourth cable cores 11. The fourth cable core 11 includes an inner sheath 11.1 and a second shielding layer 11.2 from outside to inside in sequence. A core wire is provided inside the second shielding layer 11.2. The core wire includes a fourth insulating layer 11.3 and a fourth conductor 11.4. The cross-section of the inner sheath 11.1 has two opposite first arcs and two opposite first straight lines. One side of the inner sheath 11.1 has two inner convex portions 11.5, and the other side has two outer convex portions 11.6; an inner convex block 6.7 is fixedly connected to the inner end connecting plate 6.6, and an inner embedding groove 6.8 matching with the inner convex portion 11.5 is provided at the inner convex block 6.7. An outer convex block 7.7 is fixedly connected to the outer end connecting plate 7.6, and an outer embedding groove 7.8 matching with the outer convex portion 11.6 is provided at the outer convex block 7.7. Each fourth cable core 11 is wrapped by two inner end connecting plates 6.6 and two outer end connecting plates 7.6 of the bracket unit.

[0039] The control cable further includes a skeleton unit and two temperature-measuring optical fibers 12. The skeleton unit passes through all the support units. Support bumps 5.4 are fixed on both sides of the first inner arc panel 5.1. A plurality of limiting grooves 5.5 are formed on the side surface of the support bump 5.4, and an installation groove is formed on the end surface of the support bump 5.4 for installing the temperature-measuring optical fiber 12. The skeleton unit is surrounded by two first inner arc panels 5.1 of each support unit. The skeleton unit includes a first skeleton 13 and a second skeleton 14. A plurality of limiting protrusions 13.1 that cooperate with the limiting grooves 5.5 are formed on both side surfaces of the first skeleton 13. A receiving groove 13.2 extending along the length direction of the control cable is further formed at the first skeleton 13. The second skeleton 14 is installed in the receiving groove 13.2. Two first optical fiber grooves 13.3 are formed at the receiving groove 13.2. Two second optical fiber grooves are formed at the second skeleton 14. The two first optical fiber grooves 13.3 and the two second optical fiber grooves correspond to each other one by one. The corresponding first optical fiber groove 13.3 and the second optical fiber groove are spliced into an optical fiber groove portion, and the optical fiber 15 of the optical fiber pressure sensor is installed in the optical fiber groove portion. There are 8 limiting protrusions 13.1 at the first skeleton 13, and 2 limiting grooves 5.5 are formed on the side surface of each support bump 5.4. Both the first skeleton 13 and the second skeleton 14 are of hollow structures. Both the first skeleton 13 and the second skeleton 14 are made of nylon material or both are made of PVC material.

[0040] Working principle: The control cable of the present application has various types of cable cores, so as to meet the installation requirements of more control cables. And the skeleton unit runs through the entire length of the cable, and support units are provided at intervals, so as to improve the strength of the control cable as a whole. And the cooperation of the inner embedding groove and the inner protrusion part, the cooperation of the outer embedding groove and the outer protrusion part, and the cooperation of the limiting groove and the limiting protrusion can more conveniently realize the closed installation of the two first supports, the two second supports and the two third supports of the support unit. And the skeleton unit is made of a heat-conducting metal material, and a temperature-measuring optical fiber is installed in the installation groove, so that the heat of the multiple cable cores in the control cable will be transferred to the support unit and can be detected by the temperature-measuring optical fiber. When the internal temperature of the control cable is abnormal, it can be detected. And the optical fiber of the optical fiber pressure sensor is installed between the first skeleton and the second skeleton, so that when the control cable is subjected to excessive extrusion or excessive bending, the pressure received will be detected by the optical fiber of the optical fiber pressure sensor. Therefore, the control cable of the present application can detect the internal temperature and the external pressure received.

[0041] Although the present invention has been illustrated and described with respect to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention as long as they do not exceed the scope defined by the claims of the present invention.

Claims

1. A high-strength multi-core control cable, characterized in that: From the outside to the inside, it includes an outer protective layer, an armor layer, a first shielding layer and a flame retardant tape wrapping layer, wherein the flame retardant tape wrapping layer has a plurality of bracket units, a plurality of first cable cores, a plurality of second cable cores and a plurality of third cable cores, each first cable core passes through all the bracket units, each second cable core passes through all the bracket units, and each third cable core passes through all the bracket units.

2. The high-strength multi-core control cable according to claim 1, characterized in that: The bracket unit includes two first brackets, two second brackets and two third brackets, the first bracket includes a first inner enclosure and a first outer enclosure, the first inner enclosure includes a first inner arc panel, the first outer enclosure includes a plurality of first outer arc panels, two adjacent first outer arc panels are connected by a first arc-shaped mounting plate, each first mounting plate is installed with a first cable core, and each first mounting plate of the first bracket is connected to the first inner arc panel; the second bracket includes a second inner enclosure and a second outer enclosure, the second inner enclosure includes a plurality of second inner arc panels, a first arc-shaped covering plate is connected between two adjacent second inner arc panels, and each first covering plate has a first cable core, the second outer enclosure includes a plurality of second outer arc panels, a second arc-shaped mounting plate or a third arc-shaped mounting plate is connected between two adjacent second outer arc panels, the second mounting plate and the third mounting plate of the second outer enclosure are alternately distributed, and each second The mounting plate is connected to a second inner arc panel, a second cable core is installed at each second mounting plate, a third cable core is installed at each third mounting plate, and an arc-shaped inner end connecting plate is connected between the end of the second inner enclosure and the end of the second outer enclosure; the third bracket includes a third inner enclosure and a third outer enclosure, the third inner enclosure includes a plurality of third inner arc panels, a second covering plate or a third covering plate is connected between two adjacent third inner arc panels, the second covering plate and the third covering plate of the third inner enclosure are alternately distributed, the third outer enclosure includes a plurality of third outer arc panels, an arc-shaped connecting plate is connected between two adjacent third outer arc panels, each second covering plate is connected to a third outer arc panel, each third covering plate is connected to a arc-shaped connecting plate, an arc-shaped outer end connecting plate is connected between the end of the third enclosure and the end of the fourth enclosure, each second covering plate has a second cable core, and each third covering plate has a third cable core.

3. The high-strength multi-core control cable according to claim 2, characterized in that: The first cable core includes a first conductor and a first insulating layer; the second cable core includes a second conductor and a second insulating layer; and the third cable core includes a third conductor and a third insulating layer.

4. The high-strength multi-core control cable according to claim 2, characterized in that: Each first bracket includes five first mounting plates, each second bracket includes five first covering plates, four second mounting plates, five third mounting plates and two inner end connecting plates, each third bracket includes four second covering plates, five third covering plates and two outer end connecting plates; the control cable includes 10 first cable cores, 8 second cable cores and 10 third cable cores.

5. The high-strength multi-core control cable according to claim 2, characterized in that: It also includes two fourth cable cores, which include an inner sheath and a second shielding layer from the outside to the inside, the second shielding layer has a core wire, and the core wire includes a fourth insulating layer and a fourth conductor. The cross-section of the inner sheath has two opposite first arcs and two opposite first straight lines, one side of the inner sheath has two inner protrusions, and the other side has two outer protrusions; the inner end connecting plate is fixedly connected with an inner protrusion, and the inner protrusion has an inner embedding groove that cooperates with the inner protrusion; the outer end connecting plate is fixedly connected with an outer protrusion, and the outer protrusion has an outer embedding groove that cooperates with the outer protrusion, and each fourth cable core is wrapped by the two inner end connecting plates and two outer end connecting plates of the bracket unit.

6. The high-strength multi-core control cable according to claim 2, characterized in that: It also includes a skeleton unit and two temperature measuring optical fibers, and the skeleton unit passes through all the bracket units; support protrusions are fixed on both sides of the first inner arc panel, and the side surfaces of the support protrusions have multiple limiting grooves, and the end faces of the support protrusions have installation grooves, and the installation grooves are used to install the temperature measuring optical fibers; the skeleton unit is surrounded by the two first inner arc panels of each bracket unit, and the skeleton unit includes a first skeleton and a second skeleton, and the two side surfaces of the first skeleton have multiple limiting protrusions that cooperate with the limiting grooves, and the first skeleton also has an accommodating groove extending along the length direction of the control cable, and the second skeleton is installed in the accommodating groove, and the accommodating groove has two first optical fiber grooves, and the second skeleton has two second optical fiber grooves, the two first optical fiber grooves and the two second optical fiber grooves correspond one to one, and the corresponding first optical fiber grooves and second optical fiber grooves are spliced ​​into an optical fiber groove portion, and the optical fiber of the optical fiber pressure sensor is installed in the optical fiber groove portion.

7. The high-strength multi-core control cable according to claim 6, characterized in that: The first frame has eight limiting protrusions, and the side of each supporting protrusion has two limiting grooves; the first frame and the second frame are both hollow structures.

8. The high-strength multi-core control cable according to claim 6, characterized in that: The first frame and the second frame are both made of nylon material or PVC material.

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