CN112003202A

CN112003202A - Cable connection method

Info

Publication number: CN112003202A
Application number: CN202010858762.0A
Authority: CN
Inventors: 靳珂; 赵英杰; 李超
Original assignee: China Railway 22nd Bureau Group Co Ltd; Electrification Engineering Co Ltd of China Railway 22nd Bureau Group Co Ltd
Current assignee: China Railway 22nd Bureau Group Co Ltd; Electrification Engineering Co Ltd of China Railway 22nd Bureau Group Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2020-11-27

Abstract

The invention provides a cable connecting method, which comprises the following steps: step S10: a pre-job preparation step including: step S11: confirming the specification of a main cable and the specification and the loop of a branch cable; step S12: selecting the specification of the puncture wire clamp according to the specification of the main cable and the specification of the branch cable; step S13: detecting the cable by using a detection device; step S14: after the detection is finished, discharging the cable; step S20: stripping the outer sheath of the main cable; step S30: the end part of the main cable and the end part of the branch cable are connected through a puncture wire clamp; step S40: and installing the puncture wire clamp, the end part of the main cable and the end part of the branch cable in the waterproof junction box and pouring glue into the waterproof junction box. The technical scheme of the application effectively solves the problem that the connecting effect of the main cable and the branch cable in the related technology is poor.

Description

Cable connection method

Technical Field

The invention relates to the technical field of electric power, in particular to a cable connection method.

Background

The existing power lines mostly adopt cables or wires with insulation protection layers. Indoor distribution also adopts the cable that has the insulating skin, and traditional installation branch cable mode need strip the insulating skin, adopts parallel groove clamp crimping, and the easy oxidation of contact causes contact resistance to increase gradually, and the continuous rising of temperature needs unscheduled maintenance, and the effect of connecting simultaneously is poor.

Disclosure of Invention

The invention mainly aims to provide a cable connecting method to solve the problem of poor connecting effect of a main cable and a branch cable in the related art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a cable connecting method including the steps of: step S10: a pre-job preparation step including: step S11: confirming the specification of a main cable and the specification and the loop of a branch cable; step S12: selecting the specification of the puncture wire clamp according to the specification of the main cable and the specification of the branch cable; step S13: detecting the cable by using a detection device; step S14: after the detection is finished, discharging the cable; step S20: stripping the outer sheath of the main cable; step S30: the end part of the main cable and the end part of the branch cable are connected through a puncture wire clamp; step S40: and installing the puncture wire clamp, the end part of the main cable and the end part of the branch cable in the waterproof junction box and pouring glue into the waterproof junction box.

Further, in step S20, the stripping the outer jacket of the main cable includes: selecting two cutting positions with a preset distance L on the main cable, and stripping the outer sheath of the main cable between the two cutting positions; and cutting off the filler in the outer sheath of the main cable, and wrapping the cut of the main cable by using an electrical tape.

Further, the outer diameter of the main cable is D, wherein L < 50D.

Further, the step of connecting the end of the main cable and the end of the branch cable by the piercing clip includes: step S31: determining the laying direction of the branch cable according to the construction operation space position; step S32: the puncture wire clamp is clamped on the main cable; step S33: inserting the branch cable into a branch cap of the puncture wire clamp, and adjusting the angles of the main cable and the branch cable; step S34: and fixing the puncture wire clamp on the main cable.

Furthermore, the main cable comprises a plurality of wire cores, each wire core is provided with a puncture wire clamp, and the plurality of puncture wire clamps are arranged at intervals in the extending direction of the main cable.

Furthermore, the outer diameter of each wire core is d, the distance between every two adjacent puncture wire clamps in the extension direction of the main cable is l, and l is larger than or equal to 3 d.

Further, before step S40, the connection method further includes: step S50: and carrying out power-on detection on the main cable and the branch cable which are connected by using the puncture wire clamp.

Further, the step of installing the piercing connectors, the end of the main cable and the end of the branch cable in the waterproof junction box includes: step S41: installing a waterproof junction box on the outer side of the puncture wire clamp; step S42: plugging two ends of the waterproof junction box; step S44: preparing gel resin; step S45: and pouring gel resin into the waterproof junction box through the injection port of the waterproof junction box.

Further, the step of plugging both ends of the waterproof junction box includes: the two ends of the waterproof junction box are plugged through the sponge body.

Further, between the step S42 and the step S44, the method further includes: step S43: the length of the main cable and the branch cable which are positioned outside the waterproof junction box are wound by using the adhesive tape is recorded as a, the winding length a is larger than or equal to 30 cm, the winding length of the main cable which is continuously wound after the main cable and the branch cable which are positioned outside the waterproof junction box are wound is recorded as b, and the winding length b is larger than or equal to 20 cm.

According to the technical scheme, the method comprises the steps of firstly preparing a main cable before operation, observing the arrangement direction of the main cable and a branch cable, enabling the distance between the branch cable and an electric appliance to be short, then stripping the outer sheath of the main cable to expose the wire core in the main cable, then installing a puncture wire clamp on the wire core, installing the branch cable on the puncture wire clamp, finally sleeving a waterproof junction box outside the puncture wire clamp, and pouring glue into the waterproof junction box. In the connection method in the related art, the insulation skins of the main cable and the branch cable need to be stripped to expose the metal wires, and then connection is performed, so that the main cable and the branch cable are not in tight contact and poor in conductive effect. And can make leader cable and branch cable connection effect better through foretell step for holistic electrical apparatus and the mechanical properties of interconnecting link obtain improving, simultaneously because the encapsulating is handled the back, make the holistic waterproof and anticorrosive effect of interconnecting link have certain improvement, and still have certain theftproof function. In conclusion, the installation mode adopting the technical scheme of the application is simpler and more convenient, and maintenance is not needed, so the comprehensive performance-price ratio is higher. Therefore, the technical scheme of the application effectively solves the problem that the connection effect of the main cable and the branch cable in the related technology is poor.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic flow diagram of an embodiment of a method of connecting cables according to the invention;

fig. 2 shows a detailed flowchart of step S10 of the connection method of the cable of fig. 1;

fig. 3 shows a detailed flowchart of step S20 of the connection method of the cable of fig. 1;

fig. 4 shows a detailed flowchart of step S30 of the connection method of the cable of fig. 1;

fig. 5 shows a detailed flowchart of step S40 of the connection method of the cable of fig. 1;

fig. 6 shows a schematic cross-sectional view of a connected cable according to an embodiment of the method of connecting cables according to the invention; and

fig. 7 shows a partial enlarged view at a of fig. 6.

Wherein the figures include the following reference numerals:

10. a main cable; 20. a branch cable; 30. a puncture wire clamp; 40 a waterproof junction box.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the traditional cable butt joint mode and the T joint mode, the contact points are easy to be affected with damp and oxidized, metal corrosion reaction occurs, poor contact is caused, and line faults are caused. The disconnection butt joint is a series connection mode, if one node is damaged, the whole power failure of part of road sections can be caused, and the normal illumination of the whole road is influenced.

The technical scheme of this application adopts puncture fastener T to connect the new technology of adding the waterproof box of encapsulating, because whole has waterproof and mechanical dual protection performance to adopt qualified airtight, stopped with the too much contact of air, thereby avoided the emergence of the bad condition of joint contact. The connection mode is also parallel branch, which is convenient for maintenance, and the power supply of the whole line is not needed to be cut off during maintenance, thereby ensuring the normal illumination of the street lamp in the non-fault area and reducing the scope of lamp extinction. After the novel process of the puncture wire clamp T-connection glue-pouring type waterproof junction box is adopted, the overall electrical and mechanical performance of the circuit is improved, a certain anti-theft function is considered for water resistance and corrosion resistance, the installation is simple and convenient, the maintenance is not needed, and therefore the comprehensive performance-price ratio is higher. The technical solution of the present application will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, 2 and 6, in the present embodiment, the method for connecting a cable includes the steps of:

step S10: a pre-job preparation step including: step S11: confirming the specification of the main cable 10 and the specification and the loop of the branch cable 20; step S12: selecting the specification of the puncture clamp 30 according to the specification of the main cable 10 and the specification of the branch cable 20; step S13: detecting the cable by using a detection device; step S14: after the detection is finished, discharging the cable;

step S20: stripping the outer jacket of the main cable 10;

step S30: connecting the end of the main cable 10 and the end of the branch cable 20 by a piercing clip 30;

step S40: the piercing clip 30, the end of the main cable 10, and the end of the branch cable 20 are installed in the waterproof junction box 40 and glue is poured into the waterproof junction box 40.

By applying the technical scheme of the embodiment, firstly, the main cable 10 is prepared before operation, the arrangement directions of the main cable and the branch cables are observed, the distance between the branch cables and an electric appliance is short, then the outer sheath of the main cable 10 is stripped to expose the cable core inside the main cable 10, then the puncture wire clamp 30 is installed on the cable core, the branch cable 20 is installed on the puncture wire clamp 30, finally, the waterproof junction box 40 is sleeved outside the puncture wire clamp 30, and glue is filled inside the waterproof junction box 40. In the connection method in the related art, the insulation skins of the main cable and the branch cable need to be stripped to expose the metal wires, and then connection is performed, so that the main cable and the branch cable are not in tight contact and poor in conductive effect. And can make main cable 10 and branch cable 20 connection effect better through foretell step for holistic electrical apparatus and the mechanical properties of interconnecting link obtain improving, simultaneously because the encapsulating is handled the back, make the holistic waterproof and anticorrosive effect of interconnecting link have certain improvement, and still have certain theftproof function. In conclusion, the installation mode adopting the technical scheme of the application is simpler and more convenient, and maintenance is not needed, so the comprehensive performance-price ratio is higher. Therefore, the technical scheme of the embodiment effectively solves the problem of poor connection effect of the main cable and the branch cable in the related art.

In the embodiment, a puncture clamp of a JJC10-240/150 type is adopted, the wire diameter of a main cable is 150 square millimeters, the wire diameter of a branch cable is 80 square millimeters, the wire diameter of the main cable matched with the puncture clamp can be between 95 square millimeters and 240 square millimeters, and the wire diameter of the branch cable can be between 50 square millimeters and 150 square millimeters. Of course, other types of piercing clips may be used.

In this embodiment, the detecting device is a megger, the megger has a specification of 1000V, and the main cable 10 and the branch cable 20 are respectively telemetered before the puncture clamp 30 is not installed, so as to detect whether the resistance values of the main cable 10 and the branch cable 20 are normal. Normally, the insulation resistance should be above 10 megaohms, and after telemetering by using a megger, current exists in the main cable 10 and the branch cable 20, and needs to be released to avoid being electrified when a worker operates, and certainly, the discharging can be realized by grounding the main cable 10 and the branch cable 20. The mode is convenient and fast and has good effect. Meanwhile, since the residual current in the main cable 10 and the branch cable 20 is very small, the ground is released without any influence on people around the ground.

In the embodiment, the connection of the main cable and the branch cable through the puncture clamp is a T-connection. T-shaped connection shape after connecting main cable and branch cable

The utility model provides a puncture fastener has the puncture structure, has invariable puncture pressure, need not to cut the cable, need not specialized tool. Meanwhile, the procedures of stripping the insulating layer, brushing tin, crimping, insulating binding and the like are not needed, and construction wastes such as insulating skins and wire heads are reduced. By using the piercing clip, it is possible to operate in a small space and to accomplish the connection work of a single cable only by one person. The puncture wire clamp is provided with the specially-made torque nut to ensure that each wire clamp can achieve the optimal and constant puncture pressure during installation, so that puncture is effectively guaranteed without damaging a lead, and the wire connection position has smaller contact resistance and thermal cycle state and good impact current resistance by using the puncture wire clamp. The insulation piercing connector uses a special insulation shell, and can resist illumination and environmental aging. The insulation strength is high, the insulation structure is suitable for live working under certain conditions, the service life of the whole structure can be prolonged after the puncture wire clamp is installed, and the insulation structure can be directly buried underground without maintaining the puncture wire clamp; therefore, the stability and the safety of cable connection are greatly improved, and the later maintenance cost is effectively reduced.

The mechanical strength of the shell of the waterproof junction box 40 used in the application is high, impact resistance is high, the shell can be directly buried underground, a man-made well does not need to be dug and laid, broken cable connection is not needed, a main cable is not needed to be turned back, not only is the capital cost greatly reduced, but also the construction process is simplified, and the installation time is shortened. The waterproof junction box 40 can directly enclose the junction of the main cable 10 and the branch cable 20 therein, and inject gel resin thereto. Therefore, the water-proof and anti-corrosion cable can be applied to various environments, can prevent the main cable and the branch cable from being oxidized due to water inflow, prevents metal parts of the main cable and the branch cable from being affected with damp, oxidized and rusted, and further prolongs the service life of the main cable 10 and the branch cable 20.

As shown in fig. 1, 3 and 6, in the present embodiment, the stripping the outer jacket of the main cable 10 in step S20 includes: selecting two cutting positions with a preset distance L on the main cable 10, and stripping the outer sheath of the main cable 10 between the two cutting positions of the main cable 10; the filler inside the outer sheath of the main cable 10 is cut off, and the cut of the main cable 10 is wrapped with an electrical tape. By selecting two cutting positions, the outer sheath of the main cable 10 at the position is stripped, so that the core inside the outer sheath is exposed, and in order to avoid tearing at the cut of the main cable 10 and influence the use of the main cable 10, an electrical tape is wound at the cut of the main cable 10 to protect the cut of the main cable 10.

As shown in fig. 6, in the present embodiment, the outer diameter of the main cable 10 is D, where L < 50D. The L is less than 50D, so that the construction space of workers is large, and the distance between the puncture clamps 30 is large.

As shown in fig. 1, 4 and 6, in the present embodiment, the step of connecting the end of the main cable 10 and the end of the branch cable 20 by the piercing clip 30 includes: step S31: determining the laying direction of the branch cable 20 according to the construction operation space position; step S32: the puncture wire clamp 30 is clamped on the main cable 10; step S33: inserting the branch cable 20 into a branch cap of the piercing clip 30, and adjusting the angles of the main cable 10 and the branch cable 20; step S34: the puncture clamp 30 is fixed to the main cable 10. The direction of the branch cable 20 is selected according to the actual situation of the field, and the waste of the branch cable 20 can be avoided. In step S32, the opening angle of the piercing clip 30 is adjusted according to the diameter of the core of the main cable 10 so that the piercing clip 30 can be snapped onto the core, and after the piercing clip 30 is snapped, the branch cable 20 is installed into the branch cap of the piercing clip 30 so that the branch cable 20 completely touches the bottom surface of the branch cap. And then the main cable 10 and the branch cable 20 are adjusted to a reasonable angle, so that the arrangement of the main cable 10 and the branch cable 20 can be more reasonably balanced by using space. The nut of the puncture wire clamp 30 is screwed on, the puncture wire clamp 30 is preliminarily fixed, and the nut is continuously screwed on to fix the puncture wire clamp 30 at a proper position. The piercing clamps 30 are fixed at a distance that must be staggered, while the outer jacket of the last protective layer, i.e., core, of the main cable 10 is strictly prohibited from being stripped. Determining the direction of the lay of the branch cable 20 is also known in the art as determining the routing of the lay of the branch cable 20.

As shown in fig. 6, in the present embodiment, the main cable 10 includes a plurality of cores, one piercing clip 30 is provided on each core, and the plurality of piercing clips 30 are provided at intervals in the extending direction of the main cable 10. The arrangement of the intervals can make the diameter of the connection part of the main cable 10 and the branch cable 20 smaller, so that the whole structure is more regular.

As shown in FIGS. 6 and 7, in the present embodiment, the outer diameter of the wire core is d, and the distance between two neighboring piercing clamps 30 in the extending direction of the main cable 10 is l, wherein l ≧ 3 d. L is more than or equal to 3D and L is less than 50D are mutually related and matched. The arrangement of the distance can be convenient for workers to operate on one hand, and on the other hand, the diameter of a certain position of the cable can be prevented from being too large.

As shown in fig. 1 and 6, in the present embodiment, before step S40, the connection method further includes: step S50: the main cable 10 and the branch cable 20 connected using the piercing clip 30 are subjected to the energization detection. After the main cable 10 and the branch cable 20 are connected through the puncture wire clamp 30, the circuit is electrified and detected, whether the circuit is connected or not can be effectively detected, and the situation that the circuit is not connected but glue is filled is avoided, so that a connecting position cannot be used, and the connecting position can only be cut off.

As shown in fig. 1, 5 and 6, in the present embodiment, the step of installing the piercing clip 30, the end of the main cable 10 and the end of the branch cable 20 in the waterproof junction box 40 includes: step S41: mounting the waterproof junction box 40 to the outside of the piercing clip 30; step S42: plugging two ends of the waterproof junction box 40; step S44: preparing gel resin; step S45: gel resin is poured into the interior through an injection port of the waterproof junction box 40. After the power-on test is carried out, the power-on is ensured to be correct, and the glue is uniformly filled and sealed, so that large-area reworking after wrong wire connection is avoided. Firstly, the waterproof box shell is clamped into the puncture wire clamp 30, the puncture wire clamp 30 needs to be selected reasonably, and the waterproof junction boxes 40 are arranged in a staggered mode and fastened to enable glue filling openings to face upwards. When pouring the gel, the separating rod between the two groups of gel resin is firstly pulled out, and then the two bags are fully kneaded for about 4 minutes until the uniform heating is realized. And then immediately pouring the mixed gel resin into the waterproof junction box 40 at a constant speed and slowly, so as to avoid thickening and even curing of the gel resin easily caused by too long delay time. The seal is immediately blocked after the container is filled, so as to prevent the gel resin from overflowing.

As shown in fig. 5, in the present embodiment, the step of plugging both ends of the waterproof junction box 40 includes: both ends of the waterproof junction box 40 are plugged by the sponge. The sponge can effectively prevent the gel resin from overflowing. The sponge body is regularly and tightly wound around both ends of the waterproof junction box 40.

As shown in fig. 5, in the present embodiment, between step S42 and step S44, the following is further included: step S43: the length of winding the main cable 10 and the branch cable 20 which are positioned outside the waterproof junction box 40 by using the adhesive tape is recorded as a, the winding length a is greater than or equal to 30 centimeters, the winding length of continuing to wind the main cable 10 after the winding of the main cable 10 and the branch cable 20 which are positioned outside the waterproof junction box 40 is finished is recorded as b, and the winding length b is greater than or equal to 20 centimeters. The length of the adhesive tape wound on the main cable 10 is 50 cm in total, and the main cable 10 and the branch cable 20 are wound by 30 cm in total, so that on one hand, the main cable 10 and the branch cable 20 can be fixed, and the phenomenon that the core inside the branch cable 20 is pulled and damaged due to overlarge branch between the main cable 10 and the branch cable 20 is avoided. The adhesive tape comprises a waterproof adhesive tape and a plastic adhesive tape, the sponge bodies at the two ends are wound to the outer side of the 50 cm-meter-away part of the undamaged insulating layer of the main cable, and 2 layers of the waterproof adhesive tape are wound firstly, and then 2 layers of the plastic tape are wound. When winding, the branch cables and the trunk cables are tightly adhered to and wound together for more than 30 centimeters at the position close to the waterproof box.

The technical scheme of this embodiment uses the wide range, compares in other distribution main equipment installation simpler, economic efficiency is better, also safe and reliable more, is applicable to in various illumination distribution lines and the low pressure driving system, like building distribution and road lighting etc. make the power supply line have best cost performance ratio, and the power supply mode is more diversified, satisfies the distribution demand of various buildings and different environment. The platinized alloy contact blade of the cambered surface in the insulation piercing connector can be used for connecting wires with the same wire diameter and different wire diameters, has wide connection range, can be used for connecting copper-aluminum wires, and has the function of copper-aluminum transition.

The key point of the connection method of the embodiment lies in the installation of the insulating puncture wire clamp and the installation of the waterproof junction box, if the puncture wire clamp is not operated properly in the installation, T-connection contact of a main cable and a branch cable is not in place, the line aging is accelerated due to overheating of a connector, the service life of the puncture wire clamp is influenced finally, and even leakage short circuit can be caused. So should operate according to following step and main points when the insulating puncture fastener of installation cable:

1. before the puncture clamp is installed, the surface of a main cable to be punctured must be cleaned, otherwise, if sand grains and soil exist on the main cable, the insulation and the conductivity of the puncture clamp can be influenced.

2. When the puncture wire clamp is installed, the branch cable and the equipment are connected firstly, and then the branch cable is installed on the main cable after insulation test. If the wiring position of the branch cable and the equipment has a problem, reworking is caused to influence the construction efficiency if the problem is not found in time.

3. When the outer sheath of the main cable is stripped, the filler below the outer sheath of the main cable is cut off completely, and the two ends of the stripped outer sheath of the main cable are wrapped by the electrical adhesive tape, so that the cut is not exposed.

4. The branch cable must be inserted into the wire tail sealing cover of the puncture wire clamp, and if the conducting wire is exposed, the insulation of the puncture wire clamp is affected, and the ground short-circuit fault can occur.

5. The puncture wire clamps which are adapted are configured according to the specifications of the main cable and the branch cable which are strictly required by design, the puncture wire clamps are not inconsistent with the punctured electrical specification, otherwise, the sealing is not tight, and the cable causes the occurrence of the ground short circuit fault.

6. The colors of the phases of the branch cables must be consistent with the colors of the phases of the trunk cables, so that the colors are not mixed. And an electroscope is used for checking the phase sequence before formal power transmission.

7. The puncture clamp is fixed by a staggered distance, and the last protective layer of a cable or a lead is strictly forbidden to be stripped.

8. The spur cable should pass completely through the clip and expose enough margin to tighten the spur end cap. For a piercing connector with a hard branch plug end or end cap, the branch should be in full contact with the bottom surface of the cap.

9. When the cable locating position is adjusted again after the puncture wire clamp is installed, attention is paid to the fact that the fastening bolt of the puncture wire clamp cannot be directly jacked to touch the cable, if direct jacking touch exists, isolation measures such as winding adhesive tapes or sleeve caps are adopted, and the cable insulation layer is prevented from being scratched by the cable vibration wire clamp bolt.

The operation main points of installation waterproof terminal box:

1. the shell of the waterproof junction box is mounted in place, all the puncture wire clamps are arranged in the waterproof box in order to achieve consistent space, and metal nuts on the puncture wire clamps do not need to be abutted to the main cable.

2. The two sides of the waterproof junction box must be tightly and regularly wound by the sponge body and cannot be wound too tightly, so that the middle of the sponge body is provided with pores to cause the leakage of gel.

3. The curing time of the gel resin is greatly influenced by the environmental temperature, the curing time is about 1 hour under the condition of normal temperature of 25 ℃, and the lower the external environmental temperature is, the longer the curing time is; the higher the temperature, the shorter the curing time. And after the glue filling is finished, the backfilling and burying can be carried out only after the inside is fully solidified.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method of connecting cables, comprising the steps of:

step S10: a pre-job preparation step including: step S11: confirming the specification of the main cable (10) and the specification and the loop of the branch cable (20); step S12: selecting the specification of a puncture clamp (30) according to the specification of the main cable (10) and the specification of the branch cable (20); step S13: detecting the cable by using a detection device; step S14: after the detection is finished, discharging the cable;

step S20: stripping the outer jacket of the main cable (10);

step S30: connecting the end of the main cable (10) and the end of the branch cable (20) by the piercing clip (30);

step S40: and installing the puncture wire clamp (30), the end part of the main cable (10) and the end part of the branch cable (20) in a waterproof junction box (40) and pouring glue into the waterproof junction box (40).

2. The connecting method according to claim 1, wherein in the step S20, performing peeling off of the outer jacket of the main cable (10) includes:

-selecting two cutting positions of a predetermined distance L on the main cable (10), stripping the outer sheath of the main cable (10) between the two cutting positions of the main cable (10);

and cutting off the filler in the outer sheath of the main cable (10), and wrapping the cut of the main cable (10) by using an electrical tape.

3. A method according to claim 2, characterized in that the outer diameter of the main cable (10) is D, where L < 50D.

4. The connection method according to claim 1, wherein the step of connecting the end of the main cable (10) and the end of the branch cable (20) by the piercing clip (30) comprises:

step S31: determining the laying direction of the branch cable (20) according to the construction operation space position;

step S32: -snapping the piercing clip (30) onto the main cable (10);

step S33: inserting the branch cable (20) into a branch cap of the piercing clip (30), adjusting the angle of the main cable (10) and the branch cable (20);

step S34: and fixing the puncture clamp (30) on the main cable (10).

5. The connection method according to claim 4, wherein the main cable (10) includes a plurality of cores, one piercing clip (30) is provided on each of the cores, and a plurality of piercing clips (30) are provided at intervals in an extending direction of the main cable (10).

6. The connection method according to claim 5, wherein the wire core has an outer diameter d, and the distance between two adjacent piercing clamps (30) in the extending direction of the main cable (10) is l, wherein l is larger than or equal to 3 d.

7. The connecting method according to claim 1, wherein before the step S40, the connecting method further comprises:

step S50: the main cable (10) and the branch cable (20) connected using the piercing clip (30) are electrically tested.

8. The connection method according to claim 1, wherein the step of mounting the piercing clip (30), the end of the main cable (10) and the end of the branch cable (20) in a waterproof junction box (40) comprises:

step S41: mounting the waterproof junction box (40) to the outside of the piercing clip (30);

step S42: plugging two ends of the waterproof junction box (40);

step S44: preparing gel resin;

step S45: and pouring the gel resin into the waterproof junction box (40) through an injection port of the waterproof junction box.

9. The connection method according to claim 8, wherein the step of plugging both ends of the waterproof junction box (40) comprises: the two ends of the waterproof junction box (40) are plugged through the sponge body.

10. The connecting method according to claim 8, wherein between the step S42 and the step S44 further comprising:

step S43: the length of the main cable (10) and the branch cable (20) which are positioned outside the waterproof junction box (40) are wound by using adhesive tapes is recorded as a, the winding length a is greater than or equal to 30 cm, the winding length b of the main cable (10) which is continuously wound after the main cable (10) and the branch cable (20) which are positioned outside the waterproof junction box (40) are wound is recorded as b, and the winding length b is greater than or equal to 20 cm.