A composite medium voltage insulated cable

Abstract

This invention relates to the field of power cable technology and proposes a composite medium-voltage insulated cable, comprising a filler strip, stripping grooves, reinforcing ribs, crimping member one, and crimping member two. Multiple stripping grooves are formed on the insulation layer opposite to the filler strip one. Cutting the insulation layer at the stripping grooves exposes the optical fiber unit. The crimping member one is detachably mounted on the insulation layer. The power unit and the optical fiber unit are bent to opposite sides within the crimping member one. The crimping member two is detachably connected to the crimping member one. The reinforcing rib is also detachably connected to the crimping member two. When the crimping member two is mated with the crimping member one, it is positioned between the optical fiber unit and the power unit. The crimping member two and the crimping member one compress and fix the optical fiber unit and the power unit, achieving branching of the optical fiber unit and the power unit. This technical solution addresses the problem in existing composite cables where cable damage is easily caused at the branching points during on-site construction.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, specifically to a composite medium-voltage insulated cable. Background Technology

[0002] Composite cables typically refer to cables that integrate two or more transmission units within the same cable. Currently, the most commonly used type is the optoelectronic composite medium-voltage cable, which consists of a medium-voltage power conductor and an optical fiber unit. It is widely used in smart grids, rail transit, and other scenarios. It can transmit signals while transmitting power, and when connecting to equipment, the optical fiber and the power conductor are branched off and connected to the equipment separately.

[0003] There are two types of branching for composite cables: pre-branching and field branching. Pre-branching involves fabricating the branch joints in the factory, while field branching involves removing the insulation layer on the cable at the construction site according to the actual equipment locations, and then separating and connecting the fiber optic units and power units. Field branching offers greater flexibility, but the fiber optic units are relatively fragile and easily damaged by bending at certain angles or vibrations. Additionally, if the branching is not handled smoothly enough, the power units and fiber optic units can interfere with each other, potentially causing damage to both. Furthermore, due to varying skill levels among different personnel, damage to the cable during field branching is difficult to completely eliminate. Summary of the Invention

[0004] This invention proposes a composite medium-voltage insulated cable to solve the problem that existing composite cables are prone to cable damage at branch points when branching during construction.

[0005] The technical solution of the present invention is as follows: A composite medium-voltage insulated cable includes multiple power units, optical fiber units, and an insulation layer. The insulation layer is sleeved on the power units and optical fiber units. It also includes a filler strip, stripping grooves, reinforcing ribs, a crimping member, and a crimping member. The filler strip is disposed inside the insulation layer, and the optical fiber units pass through it. Multiple stripping grooves are formed on the insulation layer at positions opposite to the filler strip. Cutting the insulation layer at the stripping grooves exposes the optical fiber units. The reinforcing ribs are disposed inside the insulation layer. The crimping member is detachably mounted. Placed on the insulating layer, multiple power units and optical fiber units pass through the first crimping member. The power units and optical fiber units are bent to both sides in the first crimping member. The second crimping member is detachably connected to the first crimping member. The reinforcing rib is detachably connected to the second crimping member. When the second crimping member is mated with the first crimping member, it is positioned between the optical fiber unit and the power unit. The second crimping member and the first crimping member compress and fix the optical fiber unit and the power unit, thereby realizing the branching of the optical fiber unit and the power unit.

[0006] Two stripping grooves are provided on both sides of the optical fiber unit. By cutting at the stripping grooves, the insulation layer at the position of the filler strip can be broken. The optical fiber unit is bent at the position where the insulation layer is broken, which is different from the bending position of the power unit. Since the optical fiber unit is relatively fragile, bending at the same position should be avoided. The power unit is more rigid and will cause the optical fiber unit to bend, resulting in damage to the optical fiber unit.

[0007] The crimping component is provided with a conductor groove and an optical fiber groove, which are respectively located on both sides of the crimping component. The power unit is bent in the conductor groove in a direction away from the optical fiber groove.

[0008] The second crimping member is provided with a conductor pressure plate and a crimping pin. When the second crimping member is connected to the first crimping member, the conductor pressure plate and the conductor groove wrap and limit the multiple power units. At the same time, the crimping pin extends between the optical fiber unit and the power unit, and the crimping pin and the optical fiber groove crimp and limit the optical fiber unit.

[0009] After the insulation layer is broken through the stripping groove, the optical fiber unit can be branched, and the optical fiber unit at the position where the insulation layer is broken is separated from the filler strip. A bending block is provided on the crimping member, and the bending block supports the optical fiber unit at the separation point between the optical fiber unit and the filler strip.

[0010] The extrusion pin can extend into the filler strip. At the bend of the optical fiber unit, the extrusion pin and the bending block clamp and limit the optical fiber unit on both sides. By limiting the bend of the optical fiber unit, the optical fiber unit can be prevented from bending freely at the bend and forming an arc with a small radius, which would cause damage.

[0011] The second crimping member is provided with a connecting platform, and the reinforcing rib can penetrate the connecting platform. The reinforcing rib can be detachably connected to the connecting platform. After the insulation layer is broken, the first crimping member is aligned with the cut of the broken insulation layer. When the first crimping member is aligned with the cut of the insulation layer, and the second crimping member is aligned with the first crimping member, the connection between the reinforcing rib and the second crimping member can press and fix the first crimping member and the second crimping member.

[0012] The insulation layer contains multiple filler strips II, which are hollow. The elasticity of filler strips II is lower than that of filler strips I, so that when the cable is bent, the optical fiber unit bends along with filler strips I. Due to the support of filler strips I, the bending arc is larger, which avoids the optical fiber from breaking. The filler strips II are placed between two adjacent power units.

[0013] An anti-deviation groove is formed on the filler strip opposite to the stripping groove. When the insulation layer is removed by cutting along the stripping groove, the cutter can extend into the anti-deviation groove. During the extrusion of the insulation layer, the insulation layer can be extruded into the anti-deviation groove. One side of the anti-deviation groove is set at a large inclination angle. After the insulation layer material enters, it can reduce the possibility of the filler strip twisting within the insulation layer, and also ensure that the position between the two stripping grooves corresponds to the optical fiber unit.

[0014] The working principle and beneficial effects of this invention are as follows: 1. In this invention, by setting a filler strip and a stripping groove, the optical fiber unit is placed inside the filler strip and is protected by it. At the same time, the stripping groove corresponds to the filler strip. The stripping groove makes it easier to peel off the insulation layer, and at the same time, the peeling position corresponds to the optical fiber unit, so that it is not necessary to cut the cable and then find the corresponding position for removal. 2. In this invention, by setting up crimping component one and crimping component two, the power unit and the optical fiber unit are clamped and fixed by the mating of crimping component one and crimping component two. The running trajectory of the optical fiber unit and the power unit is fixed by the grooves inside crimping component one and crimping component two, thereby avoiding the influence between the power unit and the optical fiber unit. It also fixes the bending arc of the optical fiber unit, preventing damage caused by small radius bending, and also wraps and protects the broken part of the insulation layer on the cable. 3. In this invention, by setting the stripping groove and the corresponding filler strip, the optical fiber unit can be easily stripped. By setting crimping piece one and crimping piece two, a shell is formed at the branch position of the composite cable. By clamping the power unit and the optical fiber unit, protection is provided on the one hand, and the movement trajectory of the power unit and the optical fiber unit is fixed to prevent uncontrolled bending curvature and damage. Compared with the traditional field branching method, the power unit and the optical fiber unit are separated by the fixed crimping piece one and crimping piece two. The running trajectory of the power unit and the optical fiber unit is fixed by crimping piece one and crimping piece two, eliminating the mutual influence between the power unit and the optical fiber unit and reducing the difficulty of field branching operation. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure from another perspective in this invention; Figure 3 This is a schematic diagram of the structure of the power unit and the crimping component in this invention. Figure 4 This is a schematic diagram of the two-phase cooperation between the optical fiber unit and the crimping component in this invention; Figure 5 This is a schematic diagram of the partial structure of the mating of crimping member one and crimping member two in this invention; Figure 6 This is a schematic diagram of the separation structure of the crimping member one and crimping member two in this invention from another perspective; Figure 7 This is a schematic diagram of the internal cross-sectional structure of the mating of the first and second crimping components in this invention; Figure 8 This is a partial internal cross-sectional view of the insulating layer, power unit, and the mating of the first and second crimping components in this invention. Figure 9 This is a partial structural diagram of the insulating layer and the filler strip in this invention.

[0017] In the diagram: 1. Power unit; 2. Fiber optic unit; 3. Insulation layer; 4. Filler strip one; 5. Stripping groove; 6. Reinforcing rib; 7. Crimp one; 8. Crimp two; 9. Conductor groove; 10. Fiber optic groove; 11. Conductor pressure plate; 12. Extrusion pin; 13. Bending pressure block; 14. Connecting platform; 15. Filler strip two; 16. Anti-deviation groove. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] This embodiment proposes a composite medium-voltage insulated cable, comprising multiple power units 1, optical fiber units 2, and an insulation layer 3. The insulation layer 3 is sleeved on the multiple power units 1 and optical fiber units 2, such as... Figures 1-9 As shown, it also includes a filler strip 4, a stripping groove 5, a reinforcing rib 6, a crimping component 7, and a crimping component 8. The filler strip 4 is disposed inside the insulating layer 3, and the optical fiber unit 2 passes through the filler strip 4, as shown. Figure 4 and Figure 9 As shown, multiple stripping grooves 5 are formed on the insulating layer 3 at positions opposite to the filler strip 4. Cutting the insulating layer 3 at the stripping grooves 5 exposes the optical fiber unit 2. Reinforcing ribs 6 are disposed inside the insulating layer 3, as shown. Figure 3 and Figure 5 As shown, the crimping component 7 is detachably mounted on the insulation layer 3. Multiple power units 1 and fiber optic units 2 pass through the crimping component 7. The annular structure on the crimping component 7 is sleeved on the cable, as shown. Figure 5 and Figure 8 As shown, power unit 1 and optical fiber unit 2 are bent to both sides in crimping member 7. Crimping member 8 is detachably connected to crimping member 7. Reinforcing rib 6 is detachably connected to crimping member 8. When crimping member 8 and crimping member 7 are connected, they are placed between optical fiber unit 2 and power unit 1. Crimping member 8 and crimping member 7 press and fix optical fiber unit 2 and power unit 1, realizing the branching of optical fiber unit 2 and power unit 1. A sealing ring is provided at the position where crimping member 7 and crimping member 8 meet to improve the moisture and water resistance of the cable branching position.

[0020] Two stripping grooves 5 are provided, located on both sides of the optical fiber unit 2, such as... Figure 9 As shown, by cutting at the stripping groove 5, the insulation layer 3 at the position of the filler strip 4 can be broken. The optical fiber unit 2 is bent at the position where the insulation layer 3 is broken, which is different from the bending position of the power unit 1. Since the optical fiber unit 2 is relatively fragile, the bending position is staggered to avoid bending at the same position. The hardness of the power unit 1 is relatively large, which will cause the optical fiber unit 2 to bend and cause damage to the optical fiber unit 2.

[0021] The crimping component 7 is provided with a conductor groove 9 and an optical fiber groove 10, which are respectively located on both sides of the crimping component 7. The power unit 1 is bent in the conductor groove 9 in a direction away from the optical fiber groove 10, such as... Figures 5-6 As shown, the internal structure of the conductor groove 9 corresponds to multiple power units 1. After the insulation layer 3 is broken through the stripping groove 5, the optical fiber unit 2 can be branched, separating the optical fiber unit 2 at the location where the insulation layer 3 is broken from the filler strip 4. The crimping component 7 is provided with a bending block 13, which supports the optical fiber unit 2 at the separation point between the optical fiber unit 2 and the filler strip 4, so that the optical fiber unit 2 follows the... Figures 7-8 The trajectory movement in the process, the squeezing of the bending block 13 can prevent the bending angle of the fiber unit 2 from being too small, and the fiber groove 10, the squeezing pin 12 and the bending block 13 together squeeze and limit the fiber unit 2.

[0022] The crimping component 2 8 is equipped with a conductor pressure plate 11 and a crimping pin 12. When the crimping component 2 8 is aligned with the crimping component 1 7, the conductor pressure plate 11 and the conductor groove 9 wrap and limit the multiple power units 1. At the same time, the crimping pin 12 extends between the optical fiber unit 2 and the power unit 1, and the crimping pin 12 and the optical fiber groove 10 crimp and limit the optical fiber unit 2. Figures 5-8As shown, the compression pin 12 can extend into the filler strip 4. At the bend of the fiber unit 2, the compression pin 12 and the bending block 13 clamp and limit the fiber unit 2 on both sides. The fiber groove 10 is set in a U-shape to prevent the fiber unit 2 from shifting. At the position where the compression pin 12 connects to the crimping member 8, a groove extends from the crimping member 8 to clamp the fiber unit 2, thereby extending the structure for fixing the fiber. By limiting the bending position of the fiber unit 2, the fiber unit 2 can be prevented from bending freely at the bending position, forming an arc with a small radius, which would cause damage.

[0023] like Figures 4-8 As shown, the second crimping member 8 is provided with a connecting platform 14, and the reinforcing rib 6 can penetrate the connecting platform 14. The reinforcing rib 6 can be detachably connected to the connecting platform 14. After the insulation layer 3 is broken, the first crimping member 7 is aligned with the cut of the insulation layer 3. When the first crimping member 7 is aligned with the cut of the insulation layer 3, and the second crimping member 8 is aligned with the first crimping member 7, the connection between the reinforcing rib 6 and the second crimping member 8 can press and fix the first crimping member 7 and the second crimping member 8. By stretching the reinforcing rib 6, and then connecting the reinforcing rib 6 to the connecting platform 14 with bolts, the second crimping member 8 is pulled by the tensile force of the reinforcing rib 6 itself, so that the second crimping member 8 pushes the first crimping member 7 towards the insulation layer 3, thereby making the first crimping member 7 and the insulation layer 3 tightly connected, and the first crimping member 7 and the second crimping member 8 tightly connected.

[0024] The insulating layer 3 has multiple filler strips 15 inside, such as Figure 2 As shown, the second filler strip 15 is hollow. The elasticity of the second filler strip 15 is lower than that of the first filler strip 4, so that when the cable is bent, the optical fiber unit 2 bends along with the first filler strip 4. Due to the support of the first filler strip 4, the bending arc is larger, which avoids the optical fiber from breaking. The second filler strip 15 is set between two adjacent power units 1.

[0025] like Figure 9 As shown, an anti-deviation groove 16 is provided on the filler strip 4 at a position opposite to the peeling groove 5. When the insulation layer 3 is removed by cutting at the position of the peeling groove 5, the cutter can extend into the anti-deviation groove 16. Figure 9 The state of the insulation layer 3 after being cut by the stripping groove 5 can be seen. The cutting blade moves along the anti-deviation groove 16 and the stripping groove 5 to cut continuously. The cutting blade will not deviate. When the insulation layer 3 is extruded, the insulation layer 3 can be extruded into the anti-deviation groove 16. One side of the anti-deviation groove 16 is set with a large tilt angle. After the insulation layer 3 material enters, it can reduce the possibility of the filler strip 4 twisting in the insulation layer 3. It also makes the position between the two stripping grooves 5 correspond to the optical fiber unit 2.

[0026] In this embodiment, when branching in the field, the cable is cut as needed, and a certain length of insulation layer 3 is stripped to expose the power unit 1 and the optical fiber unit 2. At this time, the insulation layer 3 is cut through the stripping groove 5 to expose the optical fiber unit 2 and separate it from the filler strip 4. The optical fiber unit 2 and the power unit 1 are passed through the crimping member 7, and the power unit 1 is connected to the conductor groove 9. At this time, the reinforcing rib 6 is passed through the connecting platform 14, and the crimping member 8 is connected to the crimping member 7. The compression pin 12 is inserted into the filler strip 4 to compress the optical fiber unit 2, and the conductor pressure plate 11 compresses the power unit 1. The reinforcing rib 6 is connected to the connecting platform 14 to form a branch of the power unit 1 and the optical fiber unit 2, which bends in two directions.

[0027] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite medium-voltage insulated cable, comprising multiple power units (1), optical fiber units (2), and an insulation layer (3), wherein the insulation layer (3) is sleeved on the multiple power units (1) and the optical fiber units (2), characterized in that, Also includes: A filler strip (4) is disposed inside the insulating layer (3), and the optical fiber unit (2) passes through the filler strip (4). Multiple stripping grooves (5) are formed on the insulating layer (3) at positions opposite to the filler strip (4). Cutting the insulating layer (3) at the stripping grooves (5) can expose the optical fiber unit (2). A reinforcing rib (6) is provided inside the insulating layer (3); The crimping component 1 (7) is detachably disposed on the insulating layer (3). Multiple power units (1) and optical fiber units (2) pass through the crimping component 1 (7). The power units (1) and optical fiber units (2) are bent to both sides in the crimping component 1 (7). The second crimping component (8) is detachably connected to the first crimping component (7). The reinforcing rib (6) is detachably connected to the second crimping component (8). When the second crimping component (8) and the first crimping component (7) are connected, the second crimping component (8) is positioned between the optical fiber unit (2) and the power unit (1). The second crimping component (8) and the first crimping component (7) press and fix the optical fiber unit (2) and the power unit (1) to realize the branching of the optical fiber unit (2) and the power unit (1).

2. The composite medium-voltage insulated cable according to claim 1, characterized in that, The crimping member (7) is provided with a conductor groove (9) and an optical fiber groove (10). The conductor groove (9) and the optical fiber groove (10) are respectively provided on both sides of the crimping member (7). The power unit (1) bends in the conductor groove (9) away from the optical fiber groove (10).

3. A composite medium-voltage insulated cable according to claim 2, characterized in that, The second crimping member (8) is provided with a conductor pressure plate (11) and a crimping pin (12). When the second crimping member (8) is connected to the first crimping member (7), the conductor pressure plate (11) and the conductor groove (9) wrap and limit the multiple power units (1). At the same time, the crimping pin (12) extends into the space between the optical fiber unit (2) and the power unit (1). The crimping pin (12) and the optical fiber groove (10) crimp and limit the optical fiber unit (2).

4. A composite medium-voltage insulated cable according to claim 3, characterized in that, After the insulation layer (3) is broken through the stripping groove (5), the optical fiber unit (2) can be branched, and the optical fiber unit (2) at the position where the insulation layer (3) is broken is separated from the filler strip (4). A bending block (13) is provided on the crimping member (7), and the bending block (13) supports the optical fiber unit (2) at the separation point between the optical fiber unit (2) and the filler strip (4).

5. A composite medium-voltage insulated cable according to claim 4, characterized in that, The extrusion pin (12) can extend into the filler strip (4). At the bend of the optical fiber unit (2), the extrusion pin (12) and the bending block (13) clamp and limit the optical fiber unit (2) on both sides respectively.

6. A composite medium-voltage insulated cable according to claim 1, characterized in that, The second pressing component (8) is provided with a connecting platform (14), the reinforcing rib (6) can penetrate the connecting platform (14), and the reinforcing rib (6) can be detachably connected to the connecting platform (14).

7. A composite medium-voltage insulated cable according to claim 6, characterized in that, After the insulation layer (3) is broken, the first crimping member (7) is aligned with the cut of the broken insulation layer (3). When the first crimping member (7) is aligned with the cut of the insulation layer (3), and the second crimping member (8) is aligned with the first crimping member (7), the first crimping member (7) and the second crimping member (8) can be pressed and fixed by the connection between the reinforcing rib (6) and the second crimping member (8).

8. A composite medium-voltage insulated cable according to claim 1, characterized in that, The insulating layer (3) has multiple filler strips (15) inside. The filler strips (15) are hollow and are arranged between two adjacent power units (1).

9. A composite medium-voltage insulated cable according to claim 1, characterized in that, An anti-deviation groove (16) is provided on the filler strip (4) at a position opposite to the peeling groove (5). When the peeling groove (5) is cut to remove the insulation layer (3), the cutter can extend into the anti-deviation groove (16).

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