CN117673967A - Method for laying cable in vertical shaft - Google Patents

Abstract

The application discloses a method for laying cables in a vertical shaft, and belongs to the technical field of cable laying methods. After the cable and the steel wire rope are completely released, the cable positioned in the vertical shaft is lifted through the plurality of lifting devices, the weight of the cable is balanced, so that the steel wire rope does not bear the weight of the cable any more, a fastener between the cable and the steel wire rope can be detached, the steel wire rope is separated from the cable, then the steel wire rope is pulled out of the shaft, the winding between the steel wire rope and the cable is further removed, and finally the cable is fixed on the inner wall of the vertical shaft. After the design, before the cable is fixed, the steel wire rope is drawn out in advance, the cable can not be blocked by the steel wire rope in the fixing process, time and labor are saved when the cable is fixed, and the cable laying efficiency is improved. After the design, staff does not need to drag and separate the cable and the steel wire rope by using tools such as crowbars and the like in a narrow space, so that accident risks such as falling of the staff are reduced.

Description

Method for laying cable in vertical shaft

Technical Field

The application belongs to the technical field of cable laying methods, and particularly relates to a method for laying cables in a vertical shaft.

Background

The cable laying operation in the vertical shaft mainly adopts a mode of binding a steel wire rope and a cable, and the steel wire rope and the cable are simultaneously lowered by using a steady car.

When the cable specification is bigger, when the weight of each meter is heavier, after the steel wire rope and the cable are put down for hundreds of meters, the cable and the steel wire rope are rotated due to the gravity of the cable and are wound together, and the deeper the cable is put down, the more winding turns are.

In the related art, when the cable and the steel wire rope are lowered in place, before the cable is fixed on the side wall of the vertical shaft, constructors are required to use tools such as a crowbar and the like to rotate the cable and the steel wire rope along the reverse direction of the winding direction, so that the cable is clamped after the cable is separated from the steel wire rope. Because the restriction in shaft space of shaft, manpower uses crowbar reverse direction rotation, is difficult to separate cable and wire rope, is difficult to block the cable to the wall of a well, takes place personnel's incident easily.

Disclosure of Invention

The application aims at solving the technical problem that the cable and the steel wire rope are not easy to separate when being wound in the process of laying the cable on the inner wall of the vertical shaft to a certain extent. To this end, the present application provides a method of vertical well bore cabling.

The method for cabling a vertical shaft provided by the embodiment of the application comprises the following steps:

s100, synchronously binding a cable and a steel wire rope together from the lower side of a shaft mouth of a vertical shaft;

s200, after the cable and the steel wire rope are completely released, a plurality of hoisting devices sequentially arranged on the inner wall of the vertical shaft along the height direction are fixedly connected with different parts of the cable along the height direction respectively;

s300, starting hoisting equipment to enable a plurality of hoisting equipment to hoist the cable positioned in the vertical shaft together;

s400, unbinding the cable and the steel wire rope;

s500, the steel wire rope is pulled out of a vertical shaft;

s600, fixing the cable to the inner wall of the shaft.

In some embodiments, in step S600, the cable is secured to an inner wall of the vertical shaft from bottom to top.

In some embodiments, the hoisting device is removed after the cable below the hoisting device is secured to the inner wall of the vertical shaft.

In some embodiments, in step S200, the lifting apparatus is disposed on a cage guide beam of the vertical well bore.

In some embodiments, the lifting device is a chain block.

In some embodiments, the chain block and the cable are fixedly connected by a sling.

In some embodiments, in step S100, the cable and the wire rope are bound and fixed by twine and fixing steel clip.

In some embodiments, the cable and the wire rope are secured by twine binding once every 4 meters down.

In some embodiments, the cable and the wire rope are bound and secured once by a securing steel clip every 100 meters down.

In some embodiments, the cable and the wireline are lowered simultaneously into the shaft well by a ballast car located at the shaft well head.

The invention has at least the following beneficial effects:

after the cable and the steel wire rope are completely released, the cable positioned in the vertical shaft is lifted by the plurality of lifting devices to balance the weight of the cable, so that the steel wire rope can not bear the weight of the cable any more, a fastener between the cable and the steel wire rope can be detached, the steel wire rope is separated from the cable, the steel wire rope is pulled out from the shaft, the winding between the steel wire rope and the cable is further released, and finally the cable is fixed on the inner wall of the vertical shaft. After the design, before the cable is fixed, the steel wire rope is drawn out in advance, the cable can not be blocked by the steel wire rope in the fixing process, time and labor are saved when the cable is fixed, and the cable laying efficiency is improved. After the design, staff does not need to drag and separate the cable and the steel wire rope by using tools such as crowbars and the like in a narrow space, so that accident risks such as falling of the staff are reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a method flow diagram of a method of vertical well bore cabling of the present application.

Fig. 2 shows a schematic view of the method of cabling a vertical shaft of the present application after the cable and wire rope have been fully lowered.

Fig. 3 shows a schematic view of a hoisting device fixedly connected to a cable in a method for cabling a shaft of the present application.

Fig. 4 shows a schematic cross-sectional view of fig. 2.

Fig. 5 shows a schematic view of the method of cabling a vertical well bore of the present application after unbundling of the cable and the wire rope.

Fig. 6 shows a schematic diagram of a method of cabling a shaft of the present application after a wire rope is pulled from the shaft.

Fig. 7 shows a schematic view of a method of cabling a shaft of the present application after the cable has been secured to the inner wall of the shaft.

Reference numerals: 10-vertical shaft, 11-cage guide beam, 20-cable, 30-wire rope, 40-hoisting equipment, 50-steady car, 60-hemp rope, 70-fixed steel clip and 80-cable bracket.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all the directional indicators in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The method for cabling operation in the vertical shaft mainly comprises the following steps: the steel wire rope is bundled with the cable, the bundled steel wire rope and the cable are simultaneously lowered by using a stabilizing car, and then the cable is fixed on the side wall of the shaft.

In the related art, when the cable specification is bigger, and the weight of each meter is heavier, after the steel wire rope and the cable are put down by hundreds of meters, the cable and the steel wire rope are rotated due to the gravity of the cable and are wound together, and the deeper the cable is put down, the more the winding turns are. For example, in some construction projects of the applicant, the-930 m underground central distribution room incoming line power supply is a double loop, each loop is 3 10kV thick steel wire armoured 240 flat cables, 6 cables are required to be lowered from the auxiliary shaft, after being lowered in place, the lowered cables are heavier, 17.2 kg are heavier per meter, after being lowered for hundreds of meters, the steel wire ropes rotate due to the gravity of the cables, the bundled cables also rotate along with the cables, the deeper the lowering is, the more the number of winding turns of the cables are, and when the cables are lowered in place, the cables are required to be separated from the steel wire ropes, and the cables are clamped on a bracket pre-buried in the well wall.

In the related art, after the cable and the steel wire rope are lowered in place, before the cable is fixed on the side wall of the vertical shaft, constructors are required to use tools such as a crowbar and the like to rotate the cable and the steel wire rope along the reverse direction of the winding direction, so that the cable is clamped after the cable is separated from the steel wire rope. Because the restriction in shaft space of shaft, manpower uses crowbar reverse direction rotation, is difficult to separate cable and wire rope, is difficult to block the cable to the wall of a well, takes place personnel's incident easily.

Therefore, in the related art, the technical problem that the cable and the steel wire rope are not easy to separate when being wound in the process of cabling the inner wall of the vertical shaft exists. The embodiment of the application provides a method for laying cables in a vertical shaft, which can at least solve the technical problems to a certain extent.

The present application is described below with reference to specific embodiments in conjunction with the accompanying drawings:

as shown in fig. 1, the embodiment of the present application provides a method for laying a cable in a vertical shaft, and the method for laying a cable in a vertical shaft provided in the embodiment of the present application can remove the winding between the steel wire rope 30 and the cable 20, and can improve the laying efficiency of the cable 20.

The method for cabling a vertical shaft comprises the following steps:

and S100, synchronously lowering the cable 20 and the steel wire rope 30 which are bundled together from the wellhead of the vertical shaft, as shown in fig. 2. In the process of the lower parts of the cable 20 and the steel wire rope 30, the cable 20 and the steel wire rope 30 are bound together after a certain distance is needed to be put down, so that the cable 20 and the steel wire rope 30 are fixedly connected, the steel wire rope 30 bears the weight of the cable 20, and the cable 20 is prevented from being broken or damaged due to overlarge weight.

S200, after the cable 20 and the steel wire rope 30 are completely released, a plurality of hoisting devices 40 sequentially arranged along the height of the inner wall of the shaft are fixedly connected with different parts of the cable 20 along the length direction respectively, as shown in fig. 3 and 4. That is, the inner wall of the well bore is provided with a plurality of hoisting devices 40 having different heights, and when the cable 20 and the wire rope 30 are lowered to a designated depth, the hoisting ends of the plurality of hoisting devices 40 are fixedly connected to different heights of the cable 20, and the hoisting devices 40 cooperate to hoist the cable 20. The lifting device 40 is provided with a plurality of lifting devices which are respectively connected with the parts of the cable 20 with different heights, so that the cable 20 is uniformly stressed everywhere, and the situation that the cable 20 is stressed singly and pulled off is avoided.

And S300, starting the hoisting equipment 40 to enable the plurality of hoisting equipment 40 to hoist the cable 20 positioned in the vertical shaft 10 together. After the hoisting device 40 is fixedly connected with the parts of the cable 20 with different heights, the hoisting device 40 is started, so that the hoisting device 40 applies force together to hoist the cable 20, and the steel wire rope 30 does not bear the gravity of the cable 20 any more.

S400, the cable 20 and the wire rope 30 are unbundled, as shown in fig. 5. The binding between the cable 20 and the wire rope 30 is released so that the cable 20 and the wire rope 30 are disconnected.

S500, the wire rope 30 is pulled out from the shaft 10, as shown in fig. 6. After the cable 20 and the wire rope 30 are unbundled, the wire rope 30 is pulled out of the well bore, and the wire rope 30 and the cable 20 are completely separated from each other by unwinding.

S600, the cable 20 is fixed to the inner wall of the shaft 10, as shown in fig. 7. After the cable 20 is drawn out, the cable 20 in the shaft 10 can be fixed on the inner wall of the shaft 10 without being blocked by the wire rope 30.

After the cable 20 and the steel wire rope 30 are completely lowered, the cable 20 positioned in the vertical shaft 10 is lifted through the plurality of lifting devices 40, the weight of the cable 20 is balanced, the steel wire rope 30 is not born by the weight of the cable 20 any more, in this way, the fasteners between the cable 20 and the steel wire rope 30 can be detached, the steel wire rope 30 is separated from the cable 20, then the steel wire rope 30 is pulled out of the shaft, further the steel wire rope 30 and the cable 20 are unwound, and finally the cable 20 is fixed on the inner wall of the vertical shaft 10. After the design, before the cable 20 is fixed, the steel wire rope 30 is drawn out in advance, the cable 20 is not blocked by the steel wire rope 30 in the fixing process, time and labor are saved when the cable 20 is fixed, and the laying efficiency of the cable 20 is improved. After the design, workers do not need to drag and separate the cable 20 and the steel wire rope 30 by using tools such as crowbars and the like in a narrow space, and the accident risks such as falling of the workers are reduced.

In step S100, a stabilizer 50, a guide wheel for guiding the wire rope 30 and the cable 20, and other tools are usually provided at the shaft mouth, and the lower wire rope 30 and the cable 20 are synchronized by the stabilizer 50. Synchronous payout refers to the rate at which the wire rope 30 and cable 20 are paid out being the same. During the paying-off process, the wire rope 30 and the cable 20 are bound once every a distance to fixedly connect the wire rope 30 and the cable 20, so that the wire rope 30 bears the weight of the cable 20.

In some embodiments, in step S600, the cable 20 is secured to the inner wall of the vertical well bore 10 from bottom to top. The fixing manner of the cable 20 and the inner wall of the shaft 10 is various, but not limited in this application, and in some embodiments, as shown in fig. 4, a cable support 80 is pre-buried in the inner wall of the shaft 10, and the cable 20 is fastened to the cable support 80.

The plurality of lifting devices 40 may be detached from the cable 20 together after the cable 20 is completely fixed.

After the cables 20 below each lifting apparatus 40 are secured to the inner wall of the shaft 10, the lifting apparatus 40 is no longer subject to the weight of the cables 20 below, and thus, in some embodiments, after the cables 20 below the lifting apparatus 40 are secured, the lifting apparatus 40 is removed. That is, in the process of fixing the cable 20 from bottom to top, the respective lifting devices 40 are simultaneously detached from bottom to top, the cable 20 is fixed from bottom to top, and when the lifting devices 40 are encountered, the lifting devices 40 are detached from the cable 20. After the design, the lifting equipment 40 is detached from the cable 20 from bottom to top while the cable 20 is fixed, so that the laying efficiency of the cable 20 is improved.

Along the height of the shaft 10, a plurality of cage guide beams 11 are typically provided in the shaft 10, and in some embodiments, the hoisting apparatus 40 in step 200 is provided on the pipe beams of the shaft 10, facilitating the installation of the hoisting apparatus 40.

The lifting device 40 may be a trolley, a hoist, or the like. In some embodiments, lifting device 40 is a chain block. The chain block has simple structure, small size and convenient installation and fixation. In some embodiments, the spacing between adjacent chain links is 100 meters and the work load of the chain links is 3 tons.

In some embodiments, the chain links and cable 20 are fixedly connected by a harness. One end of the sling is bound on the cable 20, and the other end of the sling is hung on a hook of the chain block, so that the fixed connection between the chain block and the cable 20 is realized. In some embodiments, in step S100, the cable 20 and the wire rope 30 are bound and secured by the twine 60 and the securing clip 70. The fixing steel card 70 has various structures and is not limited in this application. The cable 20 and the steel wire rope 30 are fixed through the hemp rope 60 and the fixed steel clamp 70, so that the connection strength between the cable 20 and the steel wire rope 30 is guaranteed.

In some embodiments, cable 20 and wire rope 30 are secured by twine 60 once per 4 meters. Each time the cable 20 and the wire rope 30 are lowered by 100 meters, they are bound and fixed by the steel clip. That is, the distance between the adjacent twines 60 is 4 meters and the distance between the adjacent steel clips is 100 meters. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A method of vertical well bore cabling comprising:

s100, synchronously lowering a cable (20) and a steel wire rope (30) which are bundled together from a wellhead of a vertical shaft (10);

s200, after the cable (20) and the steel wire rope (30) are completely released, a plurality of hoisting devices (40) which are sequentially arranged on the inner wall of the vertical shaft (10) along the height direction are respectively and fixedly connected with different parts of the cable (20) along the height direction;

s300, starting a lifting device (40), so that a plurality of lifting devices (40) jointly lift the cable (20) positioned in the vertical shaft (10);

s400, unbinding the cable (20) and the steel wire rope (30);

s500, the steel wire rope (30) is pulled out of the vertical shaft (10);

and S600, fixing the cable (20) to the inner wall of the vertical shaft (10).

2. A method of cabling a shaft according to claim 1, characterized in that in step S600 the cable (20) is fixed to the inner wall of the shaft (10) from bottom to top.

3. A method of cabling a shaft according to claim 2, characterized in that the hoisting device (40) is removed after the cable (20) below the hoisting device (40) is fixed to the inner wall of the shaft (10).

4. A method of shaft cabling according to claim 1, characterized in that in step S200 the hoisting device (40) is arranged on the cage guide beam (11) of the shaft (10).

5. A method of vertical well bore cabling as claimed in claim 1, wherein said hoisting device (40) is a chain block.

6. A method of cabling a vertical well bore according to claim 5, characterized in that the chain block and the cable (20) are fixedly connected by means of a sling.

7. The method of vertical well bore cabling according to any of claims 1-6, wherein in step S100 the cable (20) and the wire rope (30) are secured by twine (60) and securing steel clip (70).

8. The method of vertical well bore cabling according to claim 7, wherein the cable (20) and the wire rope (30) are secured once by twine (60) per 4 meters run.

9. The method of vertical well bore cabling according to claim 7, wherein the cable (20) and the wire rope (30) are secured by means of a securing steel clip (70) binding once every 100 meters down.

10. A method of cabling a shaft well according to any of claims 1-6, characterized in that the cable (20) and the wire rope (30) are lowered simultaneously into the shaft well (10) by means of a steady car (50) located at the wellhead of the shaft well.