CN206849529U - Open coal mine power shovel cable - Google Patents

Abstract

The utility model provides an electric shovel cable for open-pit coal mines, which includes a conductor, a power core formed by a co-extruded shielding layer, an insulating layer and a non-metallic shielding layer outside the conductor, and the power core is covered with an insulating metal shielding layer, the conductors of the ground core and the monitoring core are evenly spaced on the outer periphery of the power core, the conductors of the ground core, the monitoring core and the power core are stranded to form a cable core, and semi-conductive tapes and outer sheath. Outside the conductor, three layers of shielding layer, insulating layer and non-metallic shielding layer are co-extruded to form the power core, so that the power core can be guaranteed to have excellent insulation and shielding even under severe working conditions such as high and low temperature and twisting Performance, the conductors of the ground wire core and the monitoring wire core are evenly spaced around the outer circumference of the power wire core, and a layer of semi-conductive tape is wrapped around the cable core to ensure long-term stability of the cable even when the rated voltage of the cable is high. work reliably.

Description

Electric shovel cables for open pit mines

technical field

The utility model relates to the field of cables, in particular to a drag cable for connecting electric forklifts.

Background technique

With the development of the economy, people's demand for electricity continues to increase, which has led to the rapid development of the open-pit coal mining industry. More and more equipment used to mine coal resources tend to be high-power, so the wires and cables used for equipment connection tend to be The development of high voltage levels, such as when the voltage level reaches 8.7/10kV, the electric forklifts with a voltage level of 8.7/10kV used in the open-pit mining industry on the market and similar mobile equipment power supply drag cables, in the long-term During use, it is difficult to withstand harsh comprehensive working conditions such as aging, high temperature (90°C), low temperature (-40°C), wear, distortion, and tearing.

Utility model content

The purpose of this utility model is to provide an electric shovel cable for open-pit coal mines, which ensures that the cable can work stably and reliably for a long time under the condition of severe comprehensive working conditions.

In order to achieve the purpose of the above utility model, the technical solution adopted is: an electric shovel cable for open-pit coal mines, including a conductor, a co-extruded shielding layer, an insulating layer and a non-metallic shielding layer outside the conductor to form a power core. The wire core is covered with an insulating metal shielding layer, and the ground wire core and the monitoring wire core conductor are evenly spaced on the outer periphery of the power wire core. The ground wire core, the monitoring wire core conductor and the power wire core are twisted to form a cable core. A semi-conductive tape and an outer sheath are arranged in sequence outside the cable core.

Compared with the prior art, the technical effect of the utility model is: the outer conductor uses three layers of shielding layer, insulating layer and non-metallic shielding layer to co-extrude to form a power core, so that even under high, low temperature and twisting, etc. Under harsh working conditions, ensure that the power core has excellent insulation and shielding performance, the conductors of the ground core and the monitoring core are evenly spaced around the outer periphery of the power core, and a layer of semi-conductive tape is wrapped around the cable core, even if the cable is used When the rated voltage is high, it can also ensure the stable and reliable operation of the cable for a long time.

Description of drawings

Fig. 1 is the structural representation of the utility model.

detailed description

Below in conjunction with Fig. 1 the utility model is described in further detail.

An electric shovel cable for open-pit coal mines, comprising a conductor 1, a primary co-extruded shielding layer 2, an insulating layer 3 and a non-metallic shielding layer 4 outside the conductor 1 to form a power core, and the power core is covered with insulating metal The shielding layer 5, the ground wire core 8 and the monitoring wire core conductor 6 are evenly spaced on the outer periphery of the power wire core. The ground wire core 8, the monitoring wire core conductor 6 and the power wire core are twisted to form a cable core. The semiconducting tape 9 and the outer sheath 10 are arranged in sequence.

In the above scheme, the power line core, the ground line core 8 and the monitoring line core conductor 6 can all use 5 types of tinned annealed copper, and the outer conductor 1 uses a shielding layer 2, an insulating layer 3 and a non-metallic shielding layer 4 Three layers of one-time co-extrusion form the power core, so that the power core has excellent insulation and shielding performance even under severe working conditions such as high and low temperature and twisting, and the ground core 8 and the monitoring core conductor 6 are evenly spaced. On the outer periphery of the power core, the cable core can be twisted with the same core. When the cable core is formed into a cable, it does not need to be wrapped and filled. A layer of semi-conductive tape 9 is wrapped around the cable core, even if the rated voltage of the cable is up to 8.7 /10kV, it can also ensure the stable and reliable operation of the cable for a long time.

As a preferred solution, the insulated metal shielding layer 5 is a mixed braid of tinned copper wire and fiber, which further ensures that the power core has excellent insulation and shielding performance.

The outer sheath 10 is a thermoplastic polyurethane sheath. The cable as a whole has excellent properties of wear resistance, tear resistance and long service life.

As a preferred solution, the monitoring core conductor 6 is extruded with a monitoring core insulating layer 7 to prevent the harsh external environment from affecting the normal operation of the monitoring core conductor 6, and further ensure that the cable can work reliably and stably.

Claims (4)

1. A kind of 1. open coal mine power shovel cable, it is characterised in that：Including conductor（1）, the conductor（1）An outer co-extrusion conductor Screen layer（2）, insulating barrier（3）With nonmetallic screen layer（4）Power wire core is formed, the power wire core is coated with insulated metal Screen layer（5）, wire core（8）With monitoring core conductor（6）It is disposed in an evenly spaced relation in power wire core periphery, the wire core（8）、 Monitoring core conductor（6）With the twisted composition cable core of power wire core, the cable core sets gradually semi-conductive tape outside（9）And oversheath （10）.
2. 2. open coal mine according to claim 1 power shovel cable, it is characterised in that：The insulated metal screen layer（5） For tinned copper wire and fiber mixed weaving.
3. 3. open coal mine according to claim 1 power shovel cable, it is characterised in that：The oversheath（10）For thermoplasticity Polyurethane jacket.
4. 4. open coal mine according to claim 1 power shovel cable, it is characterised in that：The monitoring core conductor（6）Outside Face extrudes monitoring core insulating barrier（7）.