CN110311265A - Low temperature resistant prefabricated cable - Google Patents

Abstract

The invention belongs to the technical field of substation equipment, and in particular relates to a low temperature resistant prefabricated cable. The main cable is crimped by one end of the cable aviation plug through a sealed crimping tube. The cable aviation plug integrates the cable and the gold-plated cable female ferrule inside; the prefabricated cable socket end integrates the cable branch and the branch male ferrule inside, and is poured with insulating sealant ;The cable aviation plug is connected to the prefabricated cable socket end, and the cable connection installation is completed through the cable main cable and the cable branch, and the external electrical equipment is connected through the prefabricated cable branch. It has the characteristics of simple structure, reasonable design, plug and play, convenient and fast. It can improve the tensile strength of the cable branch and the socket end and the sealing performance of the branch and the socket end; avoid condensation in the socket and prevent the ground wire sheath from freezing and cracking. And the ground wire is reliable, not easy to fall off, and the sealing performance and insulation are stronger. The cables are easy to distinguish and find, which reduces the difficulty of on-site construction, saves the process of stripping cables, and shortens the on-site construction period.

Description

Low temperature resistant prefabricated cable

technical field

The invention belongs to the technical field of substation equipment, and in particular relates to a low temperature resistant prefabricated cable.

Background technique

Traditional substations, smart substations and modular substations put forward high requirements for design, production and construction. The factory prefabricated structure is gradually adopted, which greatly reduces the difficulty of on-site construction and shortens the construction period. Plug and play prefabricated cables It has also been widely used.

At present, prefabricated cables are often produced in the following ways:

(1) Cable selection: Most of them use ZR-KVVRP2-22 or ZR-KVVRP22;

(2) Prefabricated cable connector package: the joint between the connector and the cable adopts a screw clamp lock structure.

The shortcoming that prior art exists has following several points:

(1) ZR-KVVRP2-22 or ZR-KVVRP22 cable sheath inner sheath and outer sheath have problems such as poor low temperature resistance, low temperature brittleness and rapid aging;

(2) There is a sealing problem in the screw clamp lock structure adopted by the cable and the connector;

(3) It cannot play the role of anti-condensation water.

Contents of the invention

The present invention proposes a low-temperature-resistant prefabricated cable aimed at the above-mentioned deficiencies in the prior art. The purpose of the utility model is to provide a prefabricated cable with a simple structure and convenient operation, which has strong cold resistance performance, strong service performance and prolonged service life.

The technical solution adopted by the present invention to solve its technical problems is:

Low temperature resistant prefabricated cables, the main cable is crimped by one end of the cable aviation plug through the sealed crimping tube, the cable aviation plug is integrated with the cable and the gold-plated cable female ferrule; the prefabricated cable socket end is integrated with the cable branch and the branch male ferrule, and poured There is insulating sealant; the cable aviation plug is connected to the prefabricated cable socket end, the cable connection installation is completed through the cable main cable and the cable branch, and the external electrical equipment is connected through the prefabricated cable branch.

The main cable of the cable is provided with a low temperature resistant PE cable inner sheath and a cable outer sheath; the steel tape armor layer is arranged between the low temperature resistant PE cable inner sheath and the cable outer sheath; the main cable passes through the prefabricated The cable aviation plug is insulated and sealed and then crimped and connected through a sealed crimping tube; both ends of the cable main cable are connected with cable aviation plugs, steel tape armored layer PE sheathed ground wires and shielding layer ground wires; steel tape The armored layer PE material sheathed ground wire is connected to the ground terminal block; the shielded layer ground wire and the steel tape armored layer PE material sheathed ground wire are separately connected to the copper shield layer welding ground wire and the steel tape layer PE material sheathed ground wire ; The inner sheath 2 of the low temperature resistant PE cable is set on the outside of the copper shielding layer, and the copper shielding layer is connected to the welding ground wire of the copper shielding layer.

The main cable of the cable is a multi-core multi-strand armored flexible cable. The length is based on the actual measurement. It is prefabricated before leaving the factory.

The inner sheath of the low-temperature-resistant PE cable is used to protect the cable at extremely low temperatures, the copper shielding layer is used for cable signal shielding, the copper shielding layer is welded and connected to the copper shielding layer welding ground wire, and the copper shielding layer welding ground wire is provided externally The grounding wire of the low temperature resistant PE material sheath; the outside of the copper shielding layer and the steel tape armoring layer is provided with an insulating heat shrinkable tube, which is used to encapsulate the solder joints of the copper shielding layer and the solder joints of the steel tape armoring layer, and Insulated from the outside.

The outer sheath of the steel tape armored layer PE material sheathed grounding wire is low temperature resistant material PE, and the steel tape armored layer PE material sheathed grounding wire is used to derive the current of the steel tape armored layer and release it; The shielding layer grounding wire is the grounding wire of the cable shielding layer, the outer sheath is low temperature resistant material PE, and the shielding layer grounding wire leads the induction electromagnetic of the copper shielding layer out of the cable and releases it; the shielding layer grounding wire and the steel tape armor The PE material sheathed ground wire of the layer is welded to the copper shielding layer welding ground wire and the PE material sheathed ground wire of the steel belt layer respectively, and then encapsulated, and the other end of the PE material sheathed ground wire of the steel belt layer is connected to the grounding grid of the factory area.

The sealing crimping tube is used to crimp the tail of the cable main cable and the prefabricated cable branch, and the two are sealed together; the prefabricated cable branch is directly connected to the device from the prefabricated cable socket end; the prefabricated cable socket end integrates the cable branch and the branch male plug Core, poured with insulating sealant, and equipped with aviation sockets and fixing plates. All wiring in the cabinet is completed before leaving the factory.

The length of the prefabricated cable branch is 2 meters to 20 meters, and a single multi-strand wire is used.

The prefabricated cable branch in the prefabricated cable socket end is insulated and sealed when passing through the prefabricated cable socket end, and then crimped with a sealing crimping tube; the cable core winding tube is set outside the prefabricated cable branch to protect the cable branch; The cable coding tube is set outside the cable core winding tube and is in contact with the prefabricated cable socket end; the cable core winding tube is used for cable identification and is the ID card of the cable. The prefabricated cable socket end is equipped with a cable coding tube, and the cable core of the prefabricated cable branch is equipped with a pin and a unique identification of the pin. The cable core number and pin of the prefabricated cable branch are used to distinguish the core number and specification of the cable core; through the prefabricated cable The A terminal terminal block and the B terminal terminal block of the branch complete the wiring in the cabinet, and the prefabricated cable socket end is connected to the fixed plate.

The fixing plate is an installable part, which is installed on the prefabricated cable socket through nuts and bolts, or installed on the equipment through nuts and bolts.

The present invention has the following advantages and beneficial effects:

The cable of the present invention has the remarkable characteristics of simple structure and reasonable design. The invention improves the tensile strength of the cable branch and the socket end, as well as the sealing performance of the branch and the socket end; avoids the possibility of air entering the socket and generating condensation water under extremely cold conditions. Eliminates the possibility of freezing and cracking of the ground wire sheath caused by improper selection of wiring materials. In addition, the present invention adopts industrial production of shielding layer grounding wires and armored grounding wires, and adopts welding technology to make the grounding wires more reliable and not easy to fall off. The invention also adopts multi-layer insulating heat-shrinkable tubes to encapsulate the welding points, so that the welding points are more firm and the sealing performance and insulation are stronger.

The cable and the cable aviation plug of the present invention are crimped and packaged through the sealing crimping tube, so that the tensile performance and sealing performance of the whole cable are qualitatively improved. There are cable numbers behind the connectors at both ends of the main cable in the present invention, and the cables are easy to distinguish and more suitable for searching. Prefabricated cables are plug-and-play, convenient and quick: it reduces the difficulty of on-site construction and saves various tedious cable stripping processes. The on-site construction period is greatly shortened, and the cable plug end and the socket end installed in the cabinet before leaving the factory are plugged in the panel to complete the cable connection.

Description of drawings

In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

Fig. 1 is the aviation cable plug of the present invention and the schematic diagram of cable structure;

Fig. 2 is a schematic diagram of the aviation cable socket and cable branch structure of the present invention;

Fig. 3 is a schematic structural diagram of the implementation state of the present invention.

In the figure: cable aviation plug 1, low temperature resistant PE cable inner sheath 2, copper shielding layer 3, copper shielding layer welding ground wire 4, shielding layer grounding wire 5, sealing crimping tube 6, insulating heat shrinkable tube 7, steel tape armor Layer 8, steel tape layer PE sheathed ground wire 9, steel tape armored layer PE material sheathed ground wire 10, cable main cable 11, cable coding tube 12, prefabricated cable socket end 13, cable core winding tube 14, Prefabricated cable branch 15, fixed plate 16, cable outer sheath 17.

Detailed ways

The present invention is a low-temperature-resistant prefabricated cable. As shown in Figures 1-3, one end of the cable aviation plug 1 is crimped to the cable main cable 11 through the sealing crimping tube 6, and the cable aviation plug 1 is internally integrated with a cable and a gold-plated cable female ferrule . The prefabricated cable socket end 13 integrates cable branches and branch male ferrules inside, and is poured with insulating sealant. When in use, the cable aviation plug 1 is inserted into the prefabricated cable socket end 13, the cable connection installation is completed through the cable main cable 11 and the cable branch 15, and the external electrical equipment is connected through the prefabricated cable branch 15 to complete the current conduction. The shielding layer grounding wire 5 and the steel tape armor layer PE material sheathed grounding wire 10 welded to the shielding layer lead the induced current of the cable product into the earth.

The outside of the main cable 11 is provided with a low temperature resistant PE cable inner sheath 2 and a cable outer sheath 17, both of which are sheaths made of low temperature resistant material PE to protect all components inside the cable.

When the cable main cable 11 passes through the prefabricated cable aviation plug 1, it is crimped through the sealing crimping tube 6 after adopting an insulating and sealing package; The tensile performance and sealing performance of the whole cable are qualitatively improved.

The cable main cable 11 is a multi-core multi-strand armored flexible cable, the length of which is based on actual measurement, and the steel tape armored PE material sheathed ground wire 10 is connected to the ground terminal block. Both ends of the prefabricated cable main cable 11 are connected with cable aviation plugs 1 , steel tape armored layer PE sheathed ground wires 10 , and shielded layer ground wires 5 . The length of the main cable is subject to the on-site measurement. It is prefabricated before leaving the factory. After the on-site laying is completed, it will be connected to the socket in the cabinet, which is plug and play.

The outer sheath of the steel tape armored layer PE material sheathed grounding wire 10 is a low temperature resistant material PE, and the steel tape armored layer PE material sheathed grounding wire 10 is used to derive the electric current of the steel tape armored layer 8, and let go. The steel tape armor layer 8 is used to protect the cable and increase the compressive performance of the cable. The steel tape armor layer 8 is arranged between the inner sheath of the low temperature resistant PE cable and the outer sheath of the cable.

The inner sheath 2 of the low temperature resistant PE cable is used to protect the cable at extremely low temperature, and is directly placed on the outside of the copper shielding layer 3 . The copper shielding layer 3 is set inside the inner sheath 2 of the low temperature resistant PE cable. The copper shielding layer 3 is used for cable signal shielding, the copper shielding layer welding ground wire 4 is a grounding wire with a low temperature resistant PE material sheath outside, and the copper shielding layer 3 and the copper shielding layer welding ground wire 4 are welded and connected.

The insulating heat-shrinkable tube 7 is used to encapsulate the solder joints of the copper shielding layer 3 and the steel tape armor layer 8, and is insulated from the outside. The insulating heat-shrinkable tube 7 is provided with one layer.

The shielding layer grounding wire 5 is the grounding wire of the cable shielding layer 3, and the outer sheath is made of low-temperature-resistant material PE. The shielding layer grounding wire 5 can lead the electromagnetic induction of the copper shielding layer 3 out of the cable and release it.

The main cable grounding wire of the cable is the shielding layer grounding wire 5 and the steel tape armor layer PE material sheathed grounding wire 10, which are manufactured in a factory, and the copper shielding layer welding ground wire 4 and the steel tape layer PE material sheathed grounding wire are respectively welded 9. Then package. The other end of the steel belt layer PE material sheathed grounding wire 9 is connected or installed on the grounding grid in the factory area.

The sealing and crimping tube 6 is used for crimping the tail of the cable main cable 11 and the prefabricated cable branch 15, so that the two are hermetically joined together to meet higher tensile and sealing requirements.

The length of prefabricated cable branch 15 is 2 meters-20 meters, adopts single multi-strand electric wire, directly connects device from prefabricated cable socket end 13, exempts guide rail terminal. The prefabricated cable socket end 13 integrates cable branches and branch male ferrules inside, and is poured with insulating sealant. It is also equipped with aviation sockets and fixing plates 16. All wiring in the cabinet is completed before leaving the factory. Connect with the prefabricated cable main cable aviation plug to complete the cable wiring.

The prefabricated cable branch 15 in the prefabricated cable socket end 13 is insulated and sealed when passing through the prefabricated cable socket end 13, and then crimped with a special sealing crimping tube 6; the cable core winding tube 14 is set on the prefabricated cable branch 15 External, for protection of cable branches. The cable coding tube 12 is set on the outside of the cable core winding tube 14 and is in contact with the prefabricated cable socket end 13; the cable core winding tube 14 is used for cable identification, which is the ID card of the cable. The prefabricated cable socket end 13 is equipped with a cable coding tube 12, and the cable core of the prefabricated cable branch 15 is equipped with a pin and a unique identification of the pin. The cable core number and pin of the prefabricated cable branch 15 are used to distinguish the core number and specification of the cable core . When in use, the wiring in the cabinet is completed by the A-terminal terminal row and the B-terminal terminal row of the prefabricated cable branch 15 parts, and the prefabricated cable socket end 13 is installed on the fixed plate 16.

The fixed plate 16 is an installable part, which can be installed on the prefabricated cable socket through nuts and bolts, and can be installed on the equipment through nuts and bolts at the same time.

During specific use, as shown in FIG. 3 , the two ends of the cable main cable 11 of the present invention can be plugged into two prefabricated cable socket ends 13 respectively through the cable aviation plug 1 .

Claims (9)

1. Low temperature resistant prefabricated cable, characterized in that: one end of the cable aviation plug is crimped with the main cable through a sealed crimping tube, the cable aviation plug is internally integrated with the cable and the gold-plated cable female ferrule; the prefabricated cable socket end is internally integrated with the cable branch and branch The male ferrule is poured with insulating sealant; the cable aviation plug is connected to the prefabricated cable socket end, the cable connection installation is completed through the cable main cable and the cable branch, and the external electrical equipment is connected through the prefabricated cable branch. 2. The low temperature resistant prefabricated cable according to claim 1, characterized in that: the main cable of the cable is provided with a low temperature resistant PE cable inner sheath and a cable outer sheath; Between the cable inner sheath and the cable outer sheath; the main cable of the cable passes through the prefabricated cable aviation plug, is sealed and packaged with insulation, and then crimped and connected by a sealed crimping tube; both ends of the main cable are connected with the cable aviation plug, steel Grounding wire with armored layer PE material sheath and shielding layer grounding wire; steel tape armored layer PE material sheathed grounding wire connected to the grounding terminal block; the shielding layer grounding wire and steel tape armored layer PE material sheathed grounding wire Separately connect the copper shielding layer welding ground wire and the steel tape layer PE material sheath grounding wire; the low temperature resistant PE cable inner sheath 2 is set outside the copper shielding layer, and the copper shielding layer is connected to the copper shielding layer welding ground wire. 3. The low-temperature-resistant prefabricated cable according to claim 1, characterized in that: the main cable of the cable is a multi-core multi-strand armored flexible cable, the length is based on the actual measurement, and the prefabrication is completed before leaving the factory. The socket in the cabinet is docked, plug and play. 4. The low temperature resistant prefabricated cable according to claim 2, characterized in that: the inner sheath of the low temperature resistant PE cable is used to protect the cable at extremely low temperature, the copper shielding layer is used for cable signal shielding, and the copper shielding layer and copper The shielding layer welding ground wire is welded and connected, and the copper shielding layer welding ground wire is a grounding wire provided with a low-temperature resistant PE material sheath on the outside; the outside of the copper shielding layer and the steel tape armoring layer is provided with an insulating heat shrinkable tube for Encapsulates the solder joints of the copper shield and the steel tape armor and insulates them from the outside. 5. The low temperature resistant prefabricated cable according to claim 2, characterized in that: the outer sheath of the steel tape armor layer PE material sheath ground wire is low temperature resistant material PE, and the steel tape armor layer PE material sheath The grounding wire is used to derive the current of the steel tape armor layer and release it; the shielding layer grounding wire is the grounding wire of the cable shielding layer, the outer sheath is made of low temperature resistant material PE, and the shielding layer grounding wire takes the induction of the copper shielding layer Electromagnetically lead out the cable and release it; the shielding layer ground wire and the steel tape armor layer PE material sheath ground wire are respectively welded to the copper shield layer welding ground wire and the steel tape layer PE material sheath ground wire, and then encapsulated. The other end of the steel belt layer PE sheathed ground wire is connected to the plant ground grid. 6. The low temperature resistant prefabricated cable according to claim 1, characterized in that: the sealing crimping tube is used to crimp the tail of the cable main cable and the prefabricated cable branch, and the two are sealed together; Socket end direct connection device; the prefabricated cable socket end integrates cable branches and branch male ferrules inside, and is poured with insulating sealant, and is also equipped with aviation sockets and fixing plates. All wiring in the cabinet is completed before leaving the factory, and the screen cabinet is placed in place. , The cable wiring is completed by docking the aviation socket with the prefabricated cable main cable aviation plug. 7. The low temperature resistant prefabricated cable according to claim 1, characterized in that: the length of the branch of the prefabricated cable is 2 meters to 20 meters, and a single multi-strand wire is used. 8. The low temperature resistant prefabricated cable according to claim 2, characterized in that: when the prefabricated cable branch in the prefabricated cable socket end passes through the prefabricated cable socket end, it is insulated and sealed, and then crimped with a sealed crimping tube; The cable core winding tube is set outside the prefabricated cable branch to protect the cable branch; the cable coding tube is set outside the cable core winding tube and is in contact with the prefabricated cable socket end; the cable core winding tube is used for cable identification and is the identity of the cable. certificate. The prefabricated cable socket end is equipped with a cable coding tube, and the cable core of the prefabricated cable branch is equipped with a pin and a unique identification of the pin. The cable core number and pin of the prefabricated cable branch are used to distinguish the core number and specification of the cable core; through the prefabricated cable The A terminal terminal block and the B terminal terminal block of the branch complete the wiring in the cabinet, and the prefabricated cable socket end is connected to the fixed plate. 9. The low temperature resistant prefabricated cable according to claim 8, characterized in that: the fixing plate is an installable part, which is installed on the prefabricated cable socket through nuts and bolts, or installed on the equipment through nuts and bolts.