CN213846074U - Underground midspan power distribution device - Google Patents

Abstract

The utility model discloses a mid-range distribution device strides in pit belongs to the underground mining field. Aiming at the safety problem that the cable possibly falls due to dead weight in the operation process of the underground midspan power distribution device in the prior art, the utility model provides an underground midspan power distribution device, which comprises a cable channel and a cable clamping and hanging device; the cable channel is arranged in the security pillar, and the cable clamping and suspending device is arranged above the opening of the cable channel and used for clamping and suspending a cable passing through. The technical scheme breaks through the underground space limitation, shortens the length of the distribution line and reduces the voltage drop from the starting end to the tail end of the power distribution system; meanwhile, the cable is laid in the security pillar by the cable clamping and hanging device, so that the cable is prevented from being damaged due to dead weight or external force, and the safe and reliable operation of a power distribution system is ensured.

Description

Underground midspan power distribution device

Technical Field

The utility model belongs to underground mining field, concretely relates to midspan power distribution unit strides in pit.

Background

The large-scale, mechanical, digital and intelligent green mining of the underground mine in China becomes an important development direction of mine construction, electric energy is used as renewable clean energy to gradually replace diesel oil, power compressed air and the like in the underground mine production, and the demand is increasing day by day. The underground production power distribution system mainly adopts a point-shaped power distribution scheme, namely, the power system distributes electric energy outwards in a radial mode from underground power transformation to form a point-shaped power distribution network taking a power transformation substation as a center. And after the cable is connected out from the load transformer, the cable is laid along the underground roadway and extends to each middle section power utilization point, and a power distribution cabinet is arranged at the power utilization point for underground facility equipment.

In a power supply and distribution system, in order to ensure the normal operation of electric equipment, the voltage reduction caused by the electric energy loss of a line cannot exceed 5 percent. Limited by underground space, long transmission distance and overlarge voltage drop are often caused by laying cables along a roadway, so that the power supply cost is high, the power loss is large, and the service life of equipment is influenced. And the underground environment is complex, and the cable is laid in a roadway and is influenced by factors such as blasting, rib caving, mechanical impact and the like, so that the cable is easily damaged, and faults or safety accidents of a power supply and distribution system are caused.

The Chinese patent application, application No. CN201910673966.4, published 2019, 10 and 22 discloses a method for laying cables in deep holes under mines, which comprises the following steps: drilling a deep hole for communicating an upper middle section and a lower middle section between the upper middle section and the lower middle section, arranging a rope reel, a support and a winch on the upper middle section, arranging two guide pulleys on the support, preparing a steel wire rope and a plurality of clamps, connecting a cable and the steel wire rope through the clamps, respectively winding the steel wire rope and the cable on different guide pulleys, placing the steel wire rope from the deep hole so that the cable is also placed from the deep hole to enter the lower middle section, laying the cable to a specified place, then punching a suspension hole at the top of one side of the upper middle section close to the winch, installing a fixing ring in the suspension hole, and connecting the steel wire rope with the fixing ring by the clamps after cutting off the steel wire rope. Although the method shortens the distance of cable laying, the risk of falling and damage of the cable due to overlarge self weight cannot be completely avoided only by means of suspension of the steel wire rope, the cable can be only suitable for laying a single cable or a small number of cables through deep hole laying, and when the number of the cables is increased, the situation that the laying of a plurality of cables cannot be met due to undersize of the deep hole is small.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

To cross the safety problem that middle section distribution system probably takes place the cable because of the dead weight falls in the operation in-process in the pit among the prior art, the utility model provides a cross middle section distribution device in the pit, it can realize crossing the operation of assurance system safe and reliable more when middle section distribution system reduces the cable laying cost in the pit.

2. Technical scheme

In order to solve the technical problem, the utility model discloses a midsection distribution device strides in pit, including cable centre gripping suspension device, cable centre gripping suspension device sets up in cable passage mouth top, include the clamping part and suspend in midair the portion for the cable that the centre gripping passed with suspending in midair.

Furthermore, the clamping part of the cable clamping and hanging device comprises a cable clamp, a clamping bracket and a base bracket; the base support is installed above the cable channel opening, the clamping support is horizontally fixed on the base support, and at least one cable clamp is further fixed on the clamping support.

Further, the cable clamp comprises a first clamping piece and a second clamping piece, and the first clamping piece and the second clamping piece are connected through a bolt.

Further, the suspension part of the cable clamping suspension device comprises a suspension bracket which is vertically fixed on the base bracket.

Further, the suspension part also comprises a suspension cross beam and a sleeve; the suspension cross beam is arranged between the suspension brackets, and the sleeve is sleeved on the suspension cross beam and used as a pulley in the lowering process.

Further, the suspension part also comprises a steel wire rope, and the steel wire rope is wound on the suspension cross beam after the lower discharging cable is finished.

Further, the suspension part also comprises a rope clip for fixing the wound steel wire rope.

Further, cable centre gripping hanging device still includes stone tongs, stone tongs comprises cable clamp, plate-type rope clamp, bolt, and plate-type rope clamp installs in cable clamp one side, fastens with the bolt to be in the same place cable and wire rope are fixed.

Further, still include cable channel, cable channel sets up in the pillar of security, and cable centre gripping suspension sets up above cable channel mouth.

Further, the cable channel is a cable hole or a cable well, the cable hole is used for laying a cable, and the cable well is used for laying at least two cables.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

by adopting the underground midspan power distribution device, the limit of underground space is broken through, power supply and distribution are not limited by the length of a roadway, the power transmission distance is reduced, the cable laying cost is reduced, and the power transmission energy consumption is saved. The application of the cable clamping and suspending device avoids the safety risk of falling and damage of the cable due to overlarge dead weight in the power supply process. The cable is laid in the security pillar, so that the cable damage caused by blasting operation, vehicle passing, rib caving and the like can be avoided, and the safe and reliable operation of the power distribution system is guaranteed.

Drawings

Fig. 1 is a schematic view of a cable clamping and suspending device of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic diagram of a downhole midspan power distribution method.

The reference numbers in the figures illustrate: 1. the cable clamp suspension device comprises a substation, 2, a plurality of cables, 3, a cable channel, 4, a security pillar, 5, a cable clamp suspension device, 501, a single cable, 502, a cable clamp, 503, a clamp bracket, 504, a bolt, 505, a suspension clamp, 506, a rope clamp, 507, a base bracket, 508, a suspension bracket, 509, a suspension beam, 510, a sleeve, 511, a steel wire rope and 6, a power distribution cabinet.

Detailed Description

The invention is described in detail below with reference to the drawings and specific examples.

Example 1

Seen by the cable clamping suspension device sketch map that fig. 1 shows, the utility model discloses a cable clamping suspension device 5 that contains comprises cable 501, cable clamp 502, centre gripping support 503, bolt 504, stone tongs 505, rope card 506, base support 507, suspension support 508, suspended cross beam 509, sleeve pipe 510, the combination of wire rope 511. The base support 507 is formed by welding channel steel or I-steel, the minimum side of the size is larger than the diameter of the cable channel, and the base support is fixed on a roadway bottom plate. The clamping bracket 503 is galvanized angle steel, two ends of the clamping bracket are provided with holes, the clamping bracket is fixed on the base bracket 507 in parallel by bolts 504, and the distance is slightly larger than the length of the cable clamp 502. The suspension bracket 508 is galvanized angle steel, the lower end of the suspension bracket is welded and fixed on the base bracket 507, round steel is arranged at the upper end of the suspension bracket as a suspension cross beam 509, and a seamless steel pipe is arranged on the cross beam as a sleeve 510. The suspension cross beam 509 is used for fixing the suspension steel wire rope 511 after the cable is lowered to bear the weight of the cable 501; the sleeve 510 can also be used as a steel wire rope pulley in the lowering process, so that the cable 501 can be lowered at a constant speed. After the cable 501 is lowered into position, the wire rope 511 is wound around the suspension beam 509 and fixed by the rope clamp 506. The cable clamp 502 is generally made of a rectangular cable clamp made of rubber or nylon, and the outer skin of the cable is prevented from being scratched in the process of lowering the cable. The steel wire rope 511 is a common steel wire rope with the diameter of 10 mm-20 mm, the suspension weight is calculated according to the suspension length of the cable and the type of the cable, and the bearing coefficient is more than 5 times. The hoisting clamp 505 is composed of a cable clamp, a plate-type rope clamp and a bolt. The plate-type rope clamp is made of galvanized flat steel with holes at two ends, is installed on one side of the cable clamp and is fastened by two bolts to fix the cable and the steel wire rope together, and therefore the suspension function is achieved.

As shown in fig. 2, the utility model discloses a midsection distribution device strides in pit, including cable channel 3, cable clamping hanging device 5. The cable channel 3 is constructed in the security pillar 4, when a single cable is laid, the cable channel 3 adopts a cable hole, the cable hole is constructed by a deep hole drilling machine, the aperture is generally phi 95 mm-phi 165mm, and the hole depth is generally 10 m-90 m; when a plurality of cables are laid, the cable channel 3 adopts a cable well, the cable well is constructed by a raise boring machine, the diameter is generally phi 1.2m, and the well depth is generally 10 m-80 m; the cable clamping and hanging device 5 is positioned in a horizontal roadway with an upper layer and is arranged at the upper opening of the cable channel 3; in addition, the substation 1 is located in a lower layered horizontal roadway, the power distribution cabinet 6 is installed in a roadway near an upper layered horizontal power utilization point, after the cables are laid, the input ends of the cables are connected into the substation 1, and the output ends of the cables are connected into the power distribution cabinet 6. The distribution device breaks through the limitation of underground space, shortens the length of a distribution line, and reduces the voltage drop from the starting end to the tail end of a distribution system. Meanwhile, the cable is laid in the security pillar by the cable clamping and hanging device, so that the cable is prevented from being damaged due to dead weight or external force, and the safe and reliable operation of a power distribution system is ensured.

Example 2

Before specific construction, a substation needs to be built, in order to ensure that equipment at the tail end of a distribution line works normally and ensure that the working voltage of the equipment deviates from the voltage at the initial end within an allowable value, the power, the voltage range and the working area of underground electric equipment are determined by statistics, on the basis of ensuring that the voltage deviation at the tail end of the distribution line is within the allowable value, a reasonable position is selected according to a statistical result to set the underground substation, and the capacity of the substation is determined; secondly, calculating the length of the distribution line when the voltage drop is within the allowable range according to the cable model, and reasonably determining the distribution range of a single substation according to the length; and finally, constructing a substation at the selected position.

As shown in fig. 3, a downhole midspan power distribution method includes the following steps:

and step 100, constructing a cable channel. According to the spatial relationship of each horizontal layer of the substation and the electric equipment in the underground and the current situation of the roadway engineering, comparing the spatial relationship with the current situation, and selecting a reasonable position in the security pillar to cut a cable channel. The cable channel can adopt two forms of cable holes or cable wells, can be flexibly applied according to the number of the laid cables, a single cable is laid by adopting the cable holes, and a plurality of cables are laid by adopting the cable wells. The cable hole is generally a vertical deep hole and is drilled by a deep hole drilling machine, and the diameter of the hole is generally

The hole depth is determined according to the horizontal layering height, and is generally 10 m-90 m. Each cable hole can lay a cable, when a plurality of cables need to be laid, a plurality of cable holes can be dug in parallel, and the distance between the cable holes is generally 0.3-0.5 m. The cable well is suitable for being generally a vertical raise and is constructed by a raise drilling machine, and the diameter of the cable well is generally equal to

The well depth is determined according to the horizontal layering height, and is generally 10 m-80 m. The cable well is suitable for laying a plurality of cables in the same well. Through cable hole or cable shaft cabling, avoided the cable to lay in the tunnel, the upper and lower level layering contact tunnel distance is far away, causes the distribution lines overlength and the pressure drop problem that causes.

Step 200, installing a cable clamping and hanging device: because the cable lays in cable hole or cable shaft, vertical height is higher, and the cable dead weight is great, for avoiding the cable to suffer destruction under the dead weight load, the while is fixed cable, guarantees that it can not fall in the hole, needs to install cable centre gripping suspension at the drill way. When the cable hole is adopted for laying the cable, the overall dimension of the cable clamping and hanging device is manufactured according to the length multiplied by the width multiplied by the height of 0.5m multiplied by 0.4m multiplied by 0.5 m; when the cable well is used for laying cables, the overall dimension of the cable clamping and suspending device is manufactured according to the length multiplied by the width multiplied by the height of 1.5m multiplied by 0.4m multiplied by 0.5 m. The base support 507 is made of channel steel, welded into a groined shape and fixed at the upper opening of the cable channel; the clamping bracket 503 is made of angle steel, two ends of the clamping bracket are provided with holes, the clamping bracket is fixed on the base bracket 507 by bolts 504, and the distance between the angle steels is slightly larger than the length of the cable clamp 502; the suspension bracket 508 is made of angle steel, and the lower end of the angle steel is welded and fixed on the base bracket 507; the suspension cross beam 509 is made of round steel and is arranged on the suspension bracket 508; the sleeve 510 is made of seamless steel pipe and is sleeved on the suspension beam 509; the hoisting clamp 505 consists of a cable clamp, a plate-type rope clamp and a bolt. The plate-type rope clamp is made of galvanized flat steel with holes at two ends, is installed on one side of the cable clamp and is fastened by two bolts to fix the cable and the steel wire rope together, and therefore the suspension function is achieved. The suspension steel wire rope 511 is a common steel wire rope, when a cable is lowered, the suspension steel wire rope 511 and the cable 501 are fixed by a suspension clamp 505 and slowly lowered, the suspension steel wire rope 511 and the cable 501 are fixed by the suspension clamp 505 every 3m, after the cable is lowered in place, the steel wire rope 511 is wound on a suspension cross beam 509 and fixed by a rope clamp 506, the cable 501 is clamped by two pairs of cable clamps 502, the cable clamps 502 are staggered and stacked on a clamping support 503, and when a plurality of cables are laid, the cable clamps 502 can be tightly arranged and gaps can also be reserved.

Step 300, cabling: after a load transformer of an underground substation is connected with electricity, a cable is constructed in a cable hole or a cable well in an security pillar through the step 200 and laid, an electric winch is adopted for assisting in lowering during laying, one end of the cable and a suspension steel wire rope are fixed through a rope clamp and then placed into the cable hole or the cable well, the suspension steel wire rope is wound on a sleeve for 2-3 circles and then connected to the winch, then the winch is started, the sleeve rotates, and the cable is slowly lowered; the cable is supported by a suspension steel wire rope in the lowering process, the suspension steel wire rope and the cable are fixed by a rope clamp every 3m of lowering, and the outer side of the cable is protected by a rubber sheet during fixing, so that the cable is prevented from being damaged; after the cable is put down in place, the tail end of the suspension steel wire rope is fixed on the suspension steel beam through a rope clamp. The cable enters an upper horizontal layered roadway and a lower horizontal layered roadway and is laid to the position near a power utilization point through the roadways.

After the cable is laid, starting wiring; the cable head end is connected into a lower horizontal layered substation, and the tail end is connected with a power distribution cabinet for electric equipment.

The invention and its embodiments have been described above schematically, without being limitative, and the invention can be implemented in other specific forms without departing from the spirit or essential characteristics thereof. The representation in the drawings is only one of the embodiments of the invention, the actual construction is not limited thereto, and any reference signs in the claims shall not limit the claims concerned. Therefore, if a person skilled in the art receives the teachings of the present invention, without inventive design, a similar structure and an embodiment to the above technical solution should be covered by the protection scope of the present patent. Furthermore, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. Several of the elements recited in the product claims may also be implemented by one element in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.

Claims (8)

1. A mid-span distribution unit in pit which characterized in that: the cable clamping and hanging device comprises a cable clamping and hanging device (5), wherein the cable clamping and hanging device (5) is arranged above a cable channel opening, comprises a clamping part and a hanging part and is used for clamping and hanging a cable passing through; the clamping part of the cable clamping and hanging device (5) comprises a cable clamp (502), a clamping bracket (503) and a base bracket (507); the base support (507) is installed above the cable channel port, the clamping support (503) is horizontally fixed on the base support (507), and at least one cable clamp is further fixed on the clamping support (503); the suspension part of the cable clamping suspension device (5) comprises a suspension bracket (508), and the suspension bracket (508) is vertically fixed on a base bracket (507).

2. A downhole mid-span power distribution apparatus according to claim 1, wherein the cable clamp (502) comprises a first clamp and a second clamp, the first clamp and the second clamp being connected by a bolt.

3. A downhole midspan power distribution apparatus according to claim 2, wherein the suspension further comprises a suspension cross beam (509), a casing (510); the suspension cross beam (509) is arranged between the suspension brackets, and the sleeve (510) is sleeved on the suspension cross beam (509) and used as a pulley in the lowering process.

4. A downhole midspan power distribution apparatus according to claim 1, wherein the suspension further comprises a steel wire rope (511), the steel wire rope (511) being wound on the suspension beam (509) after completion of the lower discharging cable.

5. A downhole midspan power distribution apparatus according to claim 4, wherein the suspension further comprises a rope clip (506) for fixing the wound steel wire rope (511).

6. A downhole midspan power distribution apparatus according to claim 5, wherein the cable clamping suspension device (5) further comprises a hoisting clamp (505), the hoisting clamp (505) is composed of a cable clamp, a plate type rope clamp and a bolt, the plate type rope clamp is installed on one side of the cable clamp, fastened by the bolt, and fixes the cable and the steel wire rope together.

7. A downhole midspan power distribution apparatus according to any of claims 1 to 6, further comprising a cable channel disposed within the security pillar, the cable gripping suspension means being disposed above the cable channel opening.

8. A downhole midspan power distribution apparatus according to claim 7, wherein the cable channel is a cable bore for laying one cable or a cable well for laying at least two cables.

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