CN113629585B

CN113629585B - Cable laying construction method

Info

Publication number: CN113629585B
Application number: CN202110986753.4A
Authority: CN
Inventors: 何水清; 程锦燕
Original assignee: Guangzhou Jianyu Liye Construction Development Co ltd
Current assignee: Guangzhou Jianyu Liye Construction Development Co ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2023-09-19
Anticipated expiration: 2041-08-26
Also published as: CN113629585A

Abstract

The application relates to a cable laying construction method, which comprises the following steps: step 1, constructing a bridge, embedding bolts at appointed places on a floor slab, and installing the bridge on the floor slab through the embedded bolts; a plurality of groups of pulley devices are arranged on the bridge frame; step 2, connecting a cable; step 3, pulling the cable; and 4, installing the cable head. According to the cable laying construction method, the pulley device is arranged, so that the cable is supported in multiple points, the track trend of the cable is smoother, the cable is adapted to various complex environments in the traction process, the cable laying efficiency is greatly improved, meanwhile, the investment of manpower and material resources is reduced, and the labor intensity is reduced; in addition, the pulley device can help to reduce the scratch friction between the cable and the edge of the bridge, and further achieve the effect of reducing the damage rate of the cable sheath.

Description

Cable laying construction method

Technical Field

The application relates to the technical field of cable laying, in particular to a cable laying construction method.

Background

In modern city factory building construction, the distribution equipment for the interior of the building increases with the increase, so that large-scale cable laying in a power supply and distribution system becomes a difficulty in construction.

The cable laying system for the bridge on the floor slab in the related art comprises a wire coil and a winch, when the cable is laid, the cable is led out from the wire coil and then reaches the winch after passing through the bridge with a specified path, and the winch pulls the end part of the cable in the whole process.

Aiming at the related technology, when the cable enters the leading-out bridge, the edge of the cable and the edge of the bridge are scratched and rubbed, so that the damage rate of the cable sheath is improved.

Disclosure of Invention

Based on the above, the application aims to overcome the defects and shortcomings in the prior art and provide a cable laying construction method.

The cable laying construction method comprises the following steps:

step 1, building a bridge frame: embedding bolts at appointed places on the floor slab, and installing the bridge frame on the floor slab through the embedded bolts; a plurality of groups of pulley devices are arranged on the bridge frame;

step 2, connecting a cable: a paying-off assembly is placed at the head end of the bridge, and a cable is arranged on the paying-off assembly; a winch is arranged at the tail end of the bridge, a traction rope is arranged on the winch, and the traction rope penetrates through the bridge and is connected with a cable of the paying-off assembly;

step 3, pulling the cable: starting a winch, pulling the cable by using a traction rope, and moving the cable on a bridge by using a pulley device;

step 4, installing a cable head: after the cable is pulled, the tail end of the cable is connected through the cable head.

According to the cable laying construction method, the pulley device is arranged, so that the cable is supported in multiple points, the track trend of the cable is smoother, the cable is adapted to various complex environments in the traction process, the cable laying efficiency is greatly improved, meanwhile, the investment of manpower and material resources is reduced, and the labor intensity is reduced; in addition, the pulley device can help to reduce the rubbing friction between the cable and the edge of the bridge, so that the effect of reducing the damage rate of the cable sheath is achieved;

the cable is connected with the winch through the traction rope, and a traction mechanism is not required to be arranged for traction of the cable, so that the labor burden of constructors is reduced, and the number of field devices is reduced.

Further, in step 1, the pulley means comprises two fixed pulleys; the fixed pulleys are horizontally and rotatably arranged on the bridge, and the cable passes through the space between the two fixed pulleys.

The cable clamping device has the beneficial effects that the cable can be clamped by arranging the two fixed pulleys, so that the cable smoothly passes through the space between the two fixed pulleys.

Further, the pulley device further comprises a sliding rail and a spring; the bridge is provided with a sliding groove corresponding to the sliding rail, the sliding rail is arranged in the sliding groove in a sliding manner, and the spring is arranged in the sliding groove and tightly props against the sliding rail; one of the fixed pulleys is rotatably arranged on the slide rail.

The cable has the advantages that the spring and the sliding rail are arranged, so that the cable can compress the spring in the corner position, the distance between the two fixed pulleys is changed, and the cable can pass through the two fixed pulleys more smoothly; simultaneously, the two fixed pulleys can adapt to the traction work of cables with different diameters.

Further, arranging an expansion ring on the bridge frame every 70 meters; omega-shaped expansion rings are arranged at the joints of the cable and equipment with vibration such as a motor, a water pump, a fan and the like, and S-shaped expansion rings are arranged at other positions.

The adoption of the further scheme has the beneficial effects that as the mineral insulated cable is high in hardness, in order to avoid permanent damage to the cable caused by temperature change, an expansion ring is arranged on an allowable occasion when the cable is laid linearly over 70 meters, an S-shaped expansion ring is generally adopted, and an expansion ring is also arranged at the joint of the cable and equipment with vibration such as a motor, a water pump, a fan and the like, wherein an omega-shaped expansion ring is generally adopted.

Further, before the second step, the end or the cut of the cable is sealed by paraffin wax.

The adoption of the further scheme has the beneficial effects that in order to ensure that moisture in the air does not enter the cable insulating layer, the end part or the cutting part of the cable is required to be sealed by paraffin; the paraffin wax has good sealing effect and is easy to operate.

Further, the cable head comprises

The first connector is provided with a buckle at a first end, and a second end of the first connector is used for being connected with a cable; the root of the buckle is provided with a high Wen Bao expansion material layer;

the first end of the second connector is provided with a clamping groove connected with the buckle, and the second end of the second connector is used for being connected with the cable;

the pressure spring is arranged in the second joint; after the buckle is connected with the clamping groove, the pressure spring is propped against the first connector.

The further scheme has the beneficial effects that the first connector and the second connector are respectively connected with the cable, and then the first connector and the second connector are quickly connected by using the buckle and the clamping groove; through setting up high Wen Bao material that expands at the root of buckle, under the condition that takes place conflagration or temperature are too high, high Wen Bao material that expands is heated and explodes, makes buckle and first joint disconnection separation, and the pressure spring can make first joint and second joint bullet open the separation simultaneously, and then breaks out the connection between the cable, avoids deflagration to catch fire and causes great loss of property even endanger personnel life safety.

Further, the metal shell layers of the first connector and the second connector are respectively provided with a grounding part.

The adoption of the further scheme has the beneficial effects that the grounding part can be used for being connected with the ground wire, so that the grounding protection is realized.

Further, a sealing ring is sleeved at the first end of the first joint.

The beneficial effect of adopting above-mentioned further scheme is, through setting up the sealing washer, can improve the waterproof performance after first joint and the second joint connection.

Further, the cable head temperature measuring device is also included; the cable head temperature measuring device comprises a temperature sensor and a data acquisition terminal, wherein the temperature sensor is in wireless connection with the data acquisition terminal and is arranged on one side of the cable head.

The cable head is used as an indispensable part of a power distribution facility, the insulation reliability of the cable head plays a key role in the safe operation of a power distribution system, the temperature plays a decisive role in the aging degree of an insulating layer of the cable head in general, namely, the temperature exceeds a safe range, the aging and falling off of the insulating layer of the cable head can be accelerated for a long time, the cable breaks down, the grounding fault is caused, the cable connection is not tight, the temperature of the cable is increased, and when the temperature is increased, the insulating performance of the cable head is reduced or the insulating performance is completely lost, so that the cable head has great potential safety hazard; the temperature of the cable head can be detected in real time through the cable head temperature measuring device, and whether the cable head works normally or not is judged; the temperature sensor is powered by a lithium battery, and wireless data transmission is adopted for communication with the data acquisition terminal, so that electrical isolation between the temperature measuring probe and a weak current system is ensured.

Further, the paying-off assembly comprises a wire coil and a base, and a rotating disc is rotatably arranged on the base; the wire coil is arranged on the rotating disc; the bottom surface of base is equipped with the gyro wheel.

The beneficial effect of adopting above-mentioned further scheme is, through setting up the rotary disk, can be convenient for rotatory unwrapping wire subassembly and change unwrapping wire direction.

For a better understanding and implementation, the present application is described in detail below with reference to the drawings.

Drawings

FIG. 1 is a schematic diagram of the bridge of the present application;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic illustration of an omega-type cable expansion loop of the present application;

FIG. 4 is a schematic illustration of an S-type cable expansion loop of the present application;

FIG. 5 is a schematic view of the overall structure of the cable head of the present application;

FIG. 6 is a schematic cross-sectional view of a cable head of the present application;

FIG. 7 is a partial enlarged view at B in FIG. 6;

fig. 8 is a schematic diagram of the structure of the payout assembly of the present application.

In the figure: 10. a bridge; 11. embedding bolts; 12. a chute; 20. a pulley device; 21. a fixed pulley; 22. a spring; 30. paying-off assembly; 31. wire coil; 32. a rotating disc; 33. a base; 34. a cable; 341. a fixing clip; 41. a hoist; 42. a traction rope; 51. a first joint; 511. a buckle; 512. high Wen Bao lofting material; 513. a first through hole; 52. a second joint; 521. a clamping groove; 522. a second through hole; 523. a stepped groove; 53. a pressure spring; 54. a layer of fire-retardant material; 55. a waterproof layer; 56. a seal ring; 57. a metal outer shell layer; 581. screw holes; 582. a bolt; 59. and a grounding part.

Detailed Description

The following description of the embodiments of the present application 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 application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It is to be understood that in the description of the present application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, i.e., features defining "first," "second," may explicitly or implicitly include one or more such features. Furthermore, unless otherwise indicated, the meaning of "a plurality" is two or more.

It should be noted that, in the description of the present application, unless explicitly specified and defined otherwise, the terms "disposed," "connected," and "hollow" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 8, a cable laying construction method of the present embodiment includes the following steps:

step 1, building a bridge frame 10: embedding bolts 11 in appointed places on the floor slab, and installing a bridge 10 on the floor slab through the embedded bolts 11; several sets of pulley means 20 are mounted on the bridge 10;

specifically, the pulley device 20 includes two fixed pulleys 21; the fixed pulleys 21 are horizontally and rotatably arranged on the bridge frame 10, and a cable 34 passes through the space between the two fixed pulleys 21;

more specifically, the pulley device 20 further includes a slide rail (not shown) and a spring 22; the bridge 10 is provided with a sliding groove 12 corresponding to the sliding rail, the sliding rail is arranged in the sliding groove 12 in a sliding manner, and the spring 22 is arranged in the sliding groove 12 and tightly pushes against the sliding rail; one of the fixed pulleys 21 is rotatably arranged on the slide rail.

Step 2, connecting cable 34: a paying-off assembly 30 is placed at the head end of the bridge frame 10, and a cable 34 is arranged on the paying-off assembly 30; a winch 41 is arranged at the tail end of the bridge 10, a traction rope 42 is arranged on the winch 41, and the traction rope 42 passes through the bridge 10 and is connected with the cable 34 of the paying-off assembly 30.

Step 3, pulling the cable 34: starting a winch 41, pulling the cable 34 by using a pulling rope 42, and moving the cable 34 on the bridge 10 by using the pulley device 20;

in the process of pulling the cable 34, the cable 34 is provided with an expansion ring on the bridge 10 at intervals of 70 meters; omega-shaped expansion rings are arranged at the joints of the cable 34 and equipment with vibration such as a motor, a water pump, a fan and the like, and S-shaped expansion rings are arranged at other positions; preferably, the cable 34 is fixed on the bridge 10 by the fixing clip 341, and the cable 34 is arranged as an Ω -type expansion ring or an S-type expansion ring at a corresponding position by the fixing clip 341.

Step 4, installing a cable 34 head: after the cable 34 is pulled, the tail end of the cable 34 is connected through a cable 34 head;

specifically, the cable 34 head includes a first joint 51, a second joint 52, and a compression spring 53;

a first end of the first connector 51 is provided with a buckle 511, and a second end of the first connector 51 is used for being connected with the cable 34; the root of the buckle 511 is provided with a high Wen Bao expansion material 512; preferably, the Gao Wenbao intumescent material 512 is Fe-Ni; a first end of the second connector 52 is provided with a clamping groove 521 connected with the clamping buckle 511, and a second end of the second connector 52 is used for being connected with the cable 34; the pressure spring 53 is arranged in the second joint 52; after the buckle 511 is connected with the clamping groove 521, the pressure spring 53 abuts against the first connector 51.

More specifically, the end face of the first connector 51 is provided with a first through hole 513; the end surface of the second joint 52 is provided with a second through hole 522; the first through hole 513 and the second through hole 522 are used for the cable 34 to pass through; a stepped groove 523 is formed in the second through hole 522, and the pressure spring 53 is arranged in the stepped groove 523; screw holes 581 are formed in the side surfaces of the first and second joints 51 and 52; the screw hole 581 is connected with a bolt 582; the cable 34 passing through the first joint 51 or the second joint 52 can be pressed by the bolt 582, so that the cable 34 is locked;

more specifically, the side surfaces of the first joint 51 and the second joint 52 are wrapped with a fireproof material layer 54; the fire-retardant material layer 54 is preferably a mica material layer; the mica material not only has good insulativity, but also has stronger high temperature resistance, and can further improve the fireproof performance of the first joint 51 and the second joint 52;

more specifically, the fireproof material layer 54 is wrapped with a waterproof layer 55; the waterproof layer 55 can improve the waterproof performance of the first joint 51 and the second joint 52, and prevent the cable 34 from being short-circuited when the cable is put into water, so as to cause fire; the waterproof layer 55 is composed of a plurality of layers of waterproof sealing tapes, and a sealing ring 56 is sleeved at the first end of the first joint 51;

more specifically, the surface of the waterproof layer 55 is provided with a metal outer shell layer 57; the metal outer shell layer 57 is preferably a brass layer; the brass can effectively protect the cable 34 head from being damaged, has good fireproof and waterproof performance, and has the beneficial effects of low cost;

more specifically, the metal shell layers 57 of the first connector 51 and the second connector 52 are provided with grounding parts 59, and the grounding parts 59 can be used for being connected with a ground wire to realize grounding protection.

In the preferred embodiment, to ensure that moisture in the air does not enter the insulation of the cable 34, the ends or severance of the cable 34 are sealed with paraffin prior to step two.

In the preferred embodiment, the device also comprises a cable 34 head temperature measuring device; the temperature measuring device of the cable 34 head comprises a temperature sensor and a data acquisition terminal, wherein the temperature sensor is in wireless connection with the data acquisition terminal and is arranged on one side of the cable 34 head.

In the preferred embodiment, the pay-off assembly 30 includes a wire coil 31 and a base 33, and a rotating disc 32 is rotatably disposed on the base 33; the wire coil 31 is arranged on the rotating disc 32; the bottom surface of the base 33 is provided with rollers.

The working principle of the cable 34 head of the present embodiment:

during connection, the cables 34 to be connected pass through the first joint 51 and the second joint 52 respectively, the bolts 582 pass through the screw holes 581, the corresponding cables 34 are tightly propped up, and the two cables 34 are connected in a welding mode; the first joint 51 and the second joint 52 are connected by the clamping groove 521 and the clamping buckle 511;

when the temperature is too high or a fire occurs, the high Wen Bao expansion material 512 is heated and exploded, so that the connection between the cables 34 is disconnected, and the great property loss and even the life safety of personnel caused by deflagration and ignition are avoided.

Compared with the prior art, the pulley device is arranged, so that the multi-point bearing of the cable is facilitated, the track trend of the cable is smoother, the cable is adapted to various complex environments in the traction process, the cable laying efficiency is greatly improved, meanwhile, the investment of manpower and material resources is reduced, and the labor intensity is lightened; in addition, the pulley device can help to reduce the rubbing friction between the cable and the edge of the bridge, so that the effect of reducing the damage rate of the cable sheath is achieved;

in addition, the application has the following beneficial effects:

the first connector and the second connector are respectively connected with the cable, and then the first connector and the second connector are quickly connected by using a buckle and a clamping groove; the high Wen Bao expansion material is arranged at the root of the buckle, so that the high Wen Bao expansion material is heated and exploded under the condition of fire disaster or overhigh temperature, the buckle is disconnected and separated from the first connector, and meanwhile, the spring can lead the first connector and the second connector to be sprung and separated, so that the connection between cables is disconnected, and the situation that larger property loss is caused by detonation and ignition and even the life safety of personnel is endangered is avoided;

the cable head is taken as an indispensable part of a power distribution facility, the insulation reliability plays a key role in the safe operation of a power distribution system, the temperature plays a decisive role in the aging degree of the insulation layer of the cable head in general, namely, the temperature exceeds a safe range, the aging and falling off of the insulation layer of the cable head can be accelerated for a long time, the cable is broken, the ground fault is generated, the cable is not tightly connected, the temperature of the cable is increased, and when the temperature is increased, the insulation performance of the cable head is reduced or the insulation performance is completely lost, so that the potential safety hazard can be caused; the temperature of the cable head can be detected in real time through the cable head temperature measuring device, and whether the cable head works normally or not is judged; the temperature sensor is powered by a lithium battery, and wireless data transmission is adopted for communication with the data acquisition terminal, so that electrical isolation between the temperature measuring probe and a weak current system is ensured.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application.

Claims

1. The cable laying construction method is characterized by comprising the following steps of:

step 1, building a bridge frame: embedding bolts at appointed places on the floor slab, and installing the bridge frame on the floor slab through the embedded bolts; a plurality of groups of pulley devices are arranged on the bridge frame; the pulley device comprises two fixed pulleys; the fixed pulleys are horizontally and rotatably arranged on the bridge, and a cable passes through the space between the two fixed pulleys; the pulley device also comprises a sliding rail and a spring; the bridge is provided with a sliding groove corresponding to the sliding rail, the sliding rail is arranged in the sliding groove in a sliding manner, and the spring is arranged in the sliding groove and tightly props against the sliding rail; one fixed pulley is rotatably arranged on the sliding rail;

wherein, the cable is provided with an expansion ring on the bridge frame at intervals of more than 70 meters; omega-shaped expansion rings are arranged at the joints of the cables, the motor, the water pump and the fan, and S-shaped expansion rings are arranged at other positions;

step 4, installing a cable head: after the cable is pulled, connecting the tail end of the cable through a cable head;

the cable head comprises

the pressure spring is arranged in the second joint; after the buckle is connected with the clamping groove, the pressure spring is propped against the first connector;

the end face of the first joint is provided with a first through hole; the end face of the second joint is provided with a second through hole; the first through hole and the second through hole are used for allowing the cable to pass through; the second through hole is internally provided with a step groove, and the pressure spring is arranged in the step groove.

2. The cabling construction method according to claim 1, wherein the end or the cut of the cable is sealed by paraffin before step two.

3. The cabling construction method according to claim 1, wherein the metal housing layers of the first and second connectors are each provided with a grounding portion.

4. A cabling construction method according to claim 3, wherein the first end of the first connector is provided with a sealing ring.

5. The cabling construction method of claim 1, further comprising a cable head temperature measuring device; the cable head temperature measuring device comprises a temperature sensor and a data acquisition terminal, wherein the temperature sensor is in wireless connection with the data acquisition terminal and is arranged on one side of the cable head.

6. The cabling construction method according to claim 5, wherein the pay-off assembly comprises a wire coil and a base, and a rotating disc is rotatably arranged on the base; the wire coil is arranged on the rotating disc; the bottom surface of base is equipped with the gyro wheel.