CN214850417U - Cable intermediate head - Google Patents

Abstract

The utility model provides a cable intermediate head, includes structures such as extinguishing device, joint main part, fire prevention explosion-proof equipment, waterproof unit, protective housing, pressure release, this joint structural design is compact, need not additionally to increase explosion-proof shell, connects self collection fire prevention, explosion-proof and waterproof performance in an organic whole, can improve power cable system safe operation level, the reliable power supply of guarantee.

Description

Cable intermediate head

Technical Field

The utility model relates to a high voltage power cable field especially relates to a cable intermediate head.

Background

The cable joint is the weakest link in the high-voltage cable line, and huge short-circuit current can lead to air expansion when the joint breaks down, and insulating material carbonization, burning cause conflagration or explosion very easily, can lead to that large tracts of land cable burns out, equipment shut down when serious, cause great economic loss. At present, the fireproof and explosion-proof measures of domestic cables and accessories are various, for example, fireproof materials are brushed on the surfaces of joints, fire walls are arranged at two ends of the joints, fireproof and explosion-proof shells are additionally arranged outside the joints, and the like, wherein the fireproof materials are brushed, the coating adhesion is low, the service life is short, repeated construction is needed, only external fire can be prevented, the problem that the body cannot be solved because the fire can only be placed to spread to the two ends of the joints by the fireproof walls, and the fireproof and explosion-proof shells are complex and difficult to install due to large volume and heavy weight.

Disclosure of Invention

For solving the problem that exists among the prior art, the utility model provides a high tension cable intermediate head.

The technical scheme of the utility model as follows:

a cable intermediate joint comprises a fire extinguishing device, a joint main body, a fire and explosion preventing device, a waterproof unit, a protective shell and a pressure releasing device; the fire-proof and explosion-proof device is sleeved outside the joint main body and comprises a left part and a right part, and each part is provided with a pressure relief opening and a fire extinguishing jet orifice; the pressure relief port corresponds to a pressure relief hole of an external protective shell; the fire extinguishing jet orifice is staggered with the pressure relief opening, and quartz sand is filled in the fire-proof and explosion-proof device; the waterproof unit is arranged between the joint main body and the fireproof and explosion-proof device; the protective shell is arranged outside the fireproof and explosion-proof device and comprises a long shell, a short shell and an insulating part for connecting the two end shells; the long shell and the short shell are respectively provided with a pressure release device, the pressure release device comprises a pressure release valve plate, an annular compression flange, a sealing ring, a locking bolt and an annular sealing plate, the annular compression flange is connected with the shell flange through the locking bolt, the bottom of the inner peripheral side of the annular compression flange is provided with a groove, the annular sealing plate is arranged on the upper surface of the shell flange and inserted into the groove, the sealing ring is arranged in a reserved space between the outer diameter side of the annular sealing plate and the inner diameter side of the groove, and the pressure release valve plate is compressed between the upper surface of the annular sealing plate and the lower surface of the groove; be provided with extinguishing device on long, the short shell respectively, extinguishing device is including changing window and fire extinguisher, be equipped with the first section of thick bamboo that extends that has the flange structure on the protective housing, it extends a section of thick bamboo including the second that has the flange structure to change the window, a first section of thick bamboo that extends and the second extends a section of thick bamboo and can dismantle the connection in flange structure department, the one end of fire extinguisher is higher than a first section of thick bamboo that extends and extends in the second extends a section of thick bamboo.

Preferably, the long shell and the short shell both comprise a cylinder section and a conical section connected with the cylinder section, the pressure release device is arranged on the cylinder section, and the fire extinguishing device is arranged on the conical section.

Preferably, an intelligent monitoring device which can be connected with a sensor is arranged on the protective shell.

Preferably, the bursting pressure of the pressure relief valve plate is designed to be 0-0.8 Mpa.

Preferably, the fire extinguishing device is a temperature-sensitive automatic fire extinguishing device or the fire extinguisher is an aerosol fire extinguisher.

Preferably, the protective shell is a protective copper shell.

Preferably, the waterproof unit is a composite waterproof layer having a first waterproof unit and a second waterproof unit.

Preferably, the first waterproof unit is a non-curable self-adhesive waterproof sealing layer.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other solutions can be obtained according to the drawings without creative efforts.

Fig. 1 is a front view of a cable intermediate joint provided by the present invention;

fig. 2 is a partial cross-sectional view of a cable intermediate joint provided by the present invention;

FIG. 3 is a perspective view of the fire and explosion protection device provided by the present invention;

fig. 4 is a cross-sectional view of a pressure relief device provided by the present invention;

fig. 5 is a sectional view of the fire extinguishing apparatus provided by the present invention.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and embodiments.

A cable intermediate joint, as shown in fig. 1-5, comprises a fire extinguishing device 1, a joint main body 3, a fire and explosion protection device 5, a waterproof unit, a protective copper shell 9 and a pressure release device 10, wherein the fire and explosion protection device 5 is sleeved outside the joint main body 3 and is a protection device of the joint main body, which is a core protection unit after a joint fault and is formed by processing high-strength fibers, has high strength, strong wear resistance and strong tear resistance, can buffer the explosion impact force when the internal pressure of the joint main body is instantly increased, can absorb shock and prevent fire and reduce the impact on a shell, and the fire and explosion protection device 5 comprises a left part and a right part, wherein each part is provided with a pressure relief opening 12 and a fire extinguishing jet opening 13; the pressure relief port 12 corresponds to a pressure relief hole of the external protection copper shell 9, so that the external pressure relief hole can be relieved in advance when a fault occurs; the fire extinguishing jet orifice 13 and the pressure relief port 12 are staggered, aerosol is prevented from being flushed out by high-pressure gas during explosion, the fire extinguishing effect is prevented from being affected, and the quartz sand 2 is filled in the fireproof and explosion-proof device 5, so that the flame-retardant effect can be achieved.

The waterproof unit set up in connect the main part 3 with between the fire and explosion protection device 5, guarantee to connect the main part 3 and still can realize IP68 protection level under the waterproof circumstances of failing of protection copper casing 9. The waterproof unit comprises a first waterproof unit 6 and a second waterproof unit 7, the first waterproof unit 6 is a long-life non-curing self-adhesive waterproof sealing layer, has excellent weather resistance, aging resistance and waterproofness, and has excellent followability to thermal expansion and cold shrinkage and mechanical deformation of the surface of an adherend because the first waterproof unit is not cured for the whole life, thereby ensuring the waterproof performance for 30 years. And the second waterproof unit 7 and the first waterproof unit 6 form a composite waterproof layer, so that the overall waterproof performance is ensured.

The protection copper shell 9 is arranged on the outer side of the fireproof and explosion-proof device 5 and comprises a long copper shell, a short copper shell and an insulating part 4 used for connecting the copper shells at two ends, and quartz sand 2 is filled between the fireproof and explosion-proof device 5 and the protection copper shell 9.

And the long copper shell and the short copper shell are respectively provided with a pressure release device 10, so that the pressure is automatically released after the design pressure is reached, and the overall safety of the joint is protected. The pressure release device 10 comprises a pressure release valve plate 14, an annular pressing flange 15, a sealing ring 16, a locking bolt 17 and an annular sealing plate 18, the annular pressing flange 15 is connected with the copper shell flange through a locking bolt 17, the bottom of the inner peripheral side of the annular pressing flange 15 is provided with a groove (shown in figure 4), the annular sealing plate 18 is arranged on the upper surface of the copper shell flange and inserted into the groove, the sealing ring 16 is arranged in a reserved space between the outer diameter side of the annular sealing plate 18 and the inner diameter side of the groove, the pressure relief valve plate 14 is compressed between the upper surface of the annular sealing plate 18 and the lower surface of the groove, so that not only can labyrinth sealing be realized, meanwhile, the installation and the positioning are convenient, the structure is compact, the bursting pressure of the pressure relief valve plate is designed to be 0-0.8Mpa, preferably 0-0.7Mpa, and the material can be selected from metal or nonmetal materials according to requirements.

Be provided with extinguishing device 1 on long, the short copper shell respectively, extinguishing device 1 is temperature sensing formula automatic fire extinguishing device, can put out a fire in the twinkling of an eye self-starting, can effectively prevent the intensity of a fire to spread. Extinguishing device 1 is including changing window 19 and fire extinguisher 20, be equipped with the first section of thick bamboo 21 that extends that has the flange structure on the copper casing, change window 19 and extend a section of thick bamboo including the second that has the flange structure, a first section of thick bamboo 21 and the second that extends can dismantle the connection in flange structure department, the one end of fire extinguisher 20 is higher than a first section of thick bamboo 21 that extends and extends in a second extends a section of thick bamboo, fire extinguisher 20 is the aerosol fire extinguisher, and above-mentioned setting can make extinguishing device conveniently overhaul and change, guarantees fire extinguishing performance, and the extinguishing device position separates with pressure relief device, and too high pressure rushes out the aerosol when avoiding exploding, influences fire extinguishing effect.

The long copper shell and the short copper shell respectively comprise a cylinder section and a conical section connected with the cylinder section, the pressure release device 10 is arranged on the cylinder section, and the fire extinguishing device 1 is arranged on the conical section. Through the setting, can make the audio-visual mounted position who distinguishes pressure relief device and extinguishing device of technical staff, be unlikely to the position that the installation mistake corresponds the hole, extinguishing device installs in the taper cylinder section simultaneously, and two extinguishing device's injection direction is the slope and sets up and towards cable joint department, can make spun fire extinguishing agent concentrate on cable joint department, for perpendicular to cable joint's the mode of setting, can further promote fire extinguishing efficiency.

Be provided with intelligent monitoring device 8 on protection copper casing 9, intelligent monitoring device 8 adopts the low-power consumption design, can insert multiple sensors such as pressure, temperature, liquid level, water logging, vibration, real-time supervision joint state.

Cable 11 connects in the intermediate head, and this joint design is compact, need not additionally to increase explosion-proof shell, and joint self collects fire prevention, explosion-proof and waterproof performance in an organic whole, can improve power cable system safe operation level, and the guarantee is reliably supplied power.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (5)

1. A cable intermediate joint is characterized by comprising a fire extinguishing device, a joint main body, a fireproof and explosion-proof device, a waterproof unit, a protective shell and a pressure release device; the fire-proof and explosion-proof device is sleeved outside the joint main body and comprises a left part and a right part, and each part is provided with a pressure relief opening and a fire extinguishing jet orifice; the pressure relief port corresponds to a pressure relief hole of an external protective shell; the fire extinguishing jet orifice is staggered with the pressure relief opening, and quartz sand is filled in the fire-proof and explosion-proof device; the waterproof unit is arranged between the joint main body and the fireproof and explosion-proof device; the protective shell is arranged outside the fireproof and explosion-proof device and comprises a long shell, a short shell and an insulating part for connecting the two end shells; the long shell and the short shell are respectively provided with a pressure release device, the pressure release device comprises a pressure release valve plate, an annular compression flange, a sealing ring, a locking bolt and an annular sealing plate, the annular compression flange is connected with the shell flange through the locking bolt, the bottom of the inner peripheral side of the annular compression flange is provided with a groove, the annular sealing plate is arranged on the upper surface of the shell flange and inserted into the groove, the sealing ring is arranged in a reserved space between the outer diameter side of the annular sealing plate and the inner diameter side of the groove, and the pressure release valve plate is compressed between the upper surface of the annular sealing plate and the lower surface of the groove; the fire extinguisher is characterized in that the long shell and the short shell are respectively provided with a fire extinguishing device, the fire extinguishing device comprises a replacing window and a fire extinguisher, the protective shell is provided with a first extending cylinder with a flange structure, the replacing window comprises a second extending cylinder with a flange structure, the first extending cylinder and the second extending cylinder are detachably connected at the flange structure, and one end of the fire extinguisher is higher than the first extending cylinder and extends into the second extending cylinder; the bursting pressure of the pressure relief valve plate is designed to be 0-0.8 Mpa.

2. The cable intermediate joint of claim 1, wherein the fire extinguishing device is a temperature-sensitive automatic fire extinguishing device or the fire extinguisher is an aerosol fire extinguisher.

3. The cable intermediate joint of claim 1, wherein the protective shell is a protective copper shell.

4. The cable intermediate joint according to claim 1, wherein the waterproof unit is a composite waterproof layer having a first waterproof unit and a second waterproof unit.

5. The cable intermediate joint of claim 4, wherein the first water-resistant unit is a non-curing type self-adhesive water-resistant sealing layer.

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