CN215615709U - Slotting device for underground steel pipe - Google Patents

Abstract

The utility model relates to the technical field of electric power engineering construction, in particular to a slotting device for underground steel pipes, which extends into an embedded steel pipe through a sliding chute to provide a movable fixed platform for a flat car in the sliding chute, and the sliding chute can be made to be proper in length according to local conditions for construction; the expansion link is used for propelling the flat car, so that the flat car can run to the deep part of the embedded steel pipe along the preset route of the sliding chute, and the length of the expansion link can be self-adjusted; utilize the fixed cutting device of bracket on the flatbed, along with the steady operation of flatbed to cut pre-buried steel pipe inner wall. The utility model can efficiently cut the embedded magnetic steel pipe into horizontal gaps with basically equal intervals in the limited underground space, thereby achieving the purpose of disconnecting the closed magnetic circuit of the magnetic steel pipe, and avoiding the problems of heating and burning damage of the cable due to the fact that a closed magnetic circuit is formed when a three-phase single alternating current cable passes through the steel pipe to generate eddy current.

Description

Slotting device for underground steel pipe

Technical Field

The utility model relates to the technical field of electric power engineering construction, in particular to a slotting device for underground steel pipes.

Background

In the electric power engineering construction process, the cable line engineering often can not satisfy cable line laying professional technical requirement and be difficult to impel the construction process because of unit civil engineering pre-buried steel pipe (have magnetism) before the station: or the inner aperture of the steel pipe is insufficient, and the requirement that the same steel pipe passes through three-phase 110kV cables at the same time is not met, so that the magnetic flux vector cannot be offset; or the material of the single-phase cable passing through the steel pipe does not meet the professional requirements, and when the single three-phase alternating current cable passes through the steel pipe, a closed magnetic circuit is formed to generate eddy current, so that the cable is heated and burnt and damaged, and therefore the steel pipe needs to be subjected to slotting or steel pipe demagnetization treatment.

However, in the existing construction technical field, permanent demagnetization cannot be achieved, and in order to meet the technical requirements of cable laying, the pre-buried steel pipe needs to be subjected to slotting treatment, so that the purpose of disconnecting the magnetic steel pipe closed magnetic circuit is achieved. In view of the steel pipe of the concrete structure that the earthing is darker or bury, relate to a large amount of earthwork excavations or reinforced concrete abolish, the construction degree of difficulty is all great, construction cost requires also highly. In the past, when a person skilled in the art faces a construction environment in which a single three-phase cable needs to be laid by cutting an embedded steel pipe, the embedded steel pipe is generally short and about 300 mm-500 mm long, and the cutting of the steel pipe can be completed by hands by an old method of holding an angle grinder to cut a seam; however, the method is slow and labor-consuming in cutting, and due to the fact that the inner diameter of the embedded steel pipe is small and is about 200 mm-300 mm, the method cannot be applied to cutting gaps of magnetic steel pipes with long embedded lengths.

In order to solve the construction problem, give full play to the overall benefit and ensure the best scheme, a simple complete set of slotting device needs to be researched to meet the construction requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the slotting device for the underground steel pipes is provided, and long steel pipes can be cut into straight-through gaps in limited space.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the utility model provides a slotting device for secret steel pipe, includes spout and flatbed, the spout is arranged in stretching into pre-buried steel pipe, the flatbed is located in the spout, the one end fixedly connected with telescopic link of flatbed, be equipped with the bracket on the flatbed, the bracket is used for fixed cutting device.

According to the slotting device for the underground steel pipe, the sliding groove extends into the embedded steel pipe, a movable fixed platform is provided for the flat car in the sliding groove, and the sliding groove can be made to be proper in length according to local conditions for construction; the expansion link is used for propelling the flat car, so that the flat car can run to the deep part of the embedded steel pipe along the preset route of the sliding chute, and the length of the expansion link can be self-adjusted; utilize the fixed cutting device of bracket on the flatbed, along with the steady operation of flatbed to cut pre-buried steel pipe inner wall.

The utility model can efficiently cut the embedded magnetic steel pipe into horizontal gaps with basically equal intervals in the limited underground space, thereby achieving the purpose of disconnecting the closed magnetic circuit of the magnetic steel pipe, and avoiding the problems of heating and burning damage of the cable due to the fact that a closed magnetic circuit is formed when a three-phase single alternating current cable passes through the steel pipe to generate eddy current.

Preferably, a camera is further arranged on the flat car. The camera equipment is used for providing a visual interface, can feed back the running condition of the slotting device inside the steel pipe to an operator, is convenient to observe and control, and improves the safety.

Preferably, the camera is powered by a mobile power supply, and the mobile power supply is fixed on the telescopic rod, so that the mobile power supply and the camera can keep moving synchronously and have a certain safety distance with the cutting device.

Preferably, the bracket comprises a base and a top cap, the base is fixed with the flat car, and the top cap is rotatably connected with the base; and two opposite support edges are arranged on the top cap and used for fixing the cutting device. The adjustable bracket is used for adjusting the angle of the nozzle of the plasma machine, so that the construction is flexible.

Preferably, the bracket further comprises a bearing, the bearing is located between the base and the top cap, the base is of a convex shaft structure, and the top cap and the bearing are both sleeved on the convex shaft of the base in a matching manner.

Preferably, the telescopic rod comprises a plurality of sections of sub-rods, the plurality of sections of sub-rods are detachably connected, so that the length of the telescopic rod can be conveniently adjusted in a limited space, and the telescopic rod is used for deeply propelling the flat car.

Preferably, the cutting device is a plasma cutting machine, the plasma cutting machine comprises a case and a plasma shooting gun, the case is connected with the plasma shooting gun through a cable, the case is located in the outer space of the embedded steel pipe, the plasma shooting gun is fixed on the bracket, and the cable is laid in the sliding groove. When the plasma shooting gun is used, the plasma shooting gun and the bracket are fixed and positioned to face the inner wall of the steel pipe.

Preferably, the cabinet is connected to an air compressor. The air compressor can provide air pressure for the plasma cutting machine, so that the cutting is smooth.

Preferably, the front end of spout is equipped with the limiting plate for spacing flatbed, and be used for reminding the operating personnel flatbed of exterior space to reach the extreme position that is arranged in the spout. The front end is the end of the sliding groove facing the deep part of the embedded steel pipe and is opposite to the operation end (rear end) where the technical staff is located.

Preferably, the sliding groove comprises two sections of oppositely arranged angle steels, and the two sections of angle steels are transversely welded into a whole through at least two connecting plates. The spout can be according to local conditions selection material, and the convenient size of formulating according to the actual demand is simple structure, convenient and practical, and is with low costs.

Preferably, the width of the flat car is matched with the width of the sliding chute, so that the flat car can stably run according to a given route.

It should be noted that, above-mentioned spout both sides can stably support and lean on pre-buried steel pipe, and spout weight is far more than flatbed weight, and the flatbed slides along the spout center basically, can not make the spout rock about in pre-buried steel pipe, and owing to there is constructor to assist in the mouth of pipe and stabilize the spout to through handheld telescopic link regulation and control flatbed, can make the flatbed keep steady operation in the spout.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. the slotting device for the underground steel pipe can efficiently cut the embedded magnetic steel pipe into horizontal gaps with basically equal intervals in the limited underground space, so that the aim of disconnecting the closed magnetic circuit of the magnetic steel pipe is fulfilled, the eddy current generated by the closed magnetic circuit formed when a three-phase single alternating current cable passes through the steel pipe is avoided, and the problems of heating and burning damage of the cable are avoided.

2. The slotting device for the underground steel pipe is suitable for underground deep burying or embedding longer magnetic steel pipes in a reinforced concrete structure, provides powerful technical support for similar problems in the later construction process, and can directly guide actual construction application.

3. The slotting device for the underground steel pipe can avoid special construction and vegetation restoration of difficult deep foundation pit excavation and more complicated related matters; through budget, the cost is directly saved by 23 ten thousand yuan, and better economic benefit is obtained.

4. The slotting device for the underground steel pipe solves the construction problem, is simple, feasible, economical and practical, reduces the construction difficulty to a great extent, and improves the construction efficiency.

Drawings

Fig. 1 is a schematic structural view of a slitting device for underground steel pipes.

FIG. 2 is a schematic view of the use state of the slotting device when the slotting device is used for slotting underground embedded steel pipes.

Fig. 3 is a schematic view of the structure of the flatcar assembly in the chute.

Fig. 4 is a schematic cross-sectional view of the slitting device when it is in the pre-buried steel pipe.

Fig. 5 is a schematic structural view of an adjustable bracket in embodiment 2.

FIG. 6 is a schematic top view of the adjustable bracket.

Fig. 7 is a schematic view of the connection structure of the adjustable telescopic rod.

Icon: 1, pre-burying a steel pipe; 2-a chute; 3-flatbed vehicle; 4, a telescopic rod; 41-a sleeve member; 42-sub-rods; 5-a bracket; 51-a bearing; 52-top cap; 53-a base; 54-a ridge; 6-a camera; 7-a mobile power supply; 8-a limiting plate; 9-plasma cutter; 91-a case; 92-a plasma gun; 93-a cable; 10-an air compressor; 11-a distribution box; 12-gap.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Example 1

The utility model provides a slotting device for underground steel pipe, as shown in fig. 1-4, includes spout 2 and flatbed car 3, and spout 2 is arranged in stretching into pre-buried steel pipe 1, and flatbed car 3 is arranged in spout 2, and the one end fixedly connected with telescopic link 4 of flatbed 3 is equipped with bracket 5 on the flatbed 3, and bracket 5 is used for fixed cutting device.

Specifically, the width of flatbed 3 and the width adaptation of spout 2 guarantee that flatbed 3 moves according to established route stability. The width of the sliding chute 2 is preferably equal to the inner diameter 2/3 of the embedded steel pipe 1; the width of the flat car 3 is slightly smaller than the inner width of the sliding chute 2, so that the flat car 3 can move along the inner width of the sliding chute 2. The flat car 3 is provided with 4 small wheels and a telescopic rod 4, and the outer edges of the small wheels and the outer edge of the flat car 3 are positioned on the same vertical plane; the head end of the telescopic rod 4 is welded with the flat car 3, and the tail end of the telescopic rod 4 is spliced by a screw opening and can be lengthened according to the required length.

2 both sides of spout can stably support and lean on pre-buried steel pipe 1, with 1 inner wall line contact of pre-buried steel pipe, 2 weight of spout are far greater than 3 weight of flatbed, and 3 centrobarics of flatbed are close to 2 centers of spout basically, can not make spout 2 rock about pre-buried steel pipe 1, and owing to there is constructor at the supplementary spout 1 that stabilizes of mouth of pipe to regulate and control flatbed 3 through handheld telescopic link 4, can make flatbed 3 keep steady operation in spout 2.

The front end of the chute 2 is preferably provided with a limit plate 8 for limiting the flat car 3 and for reminding an operator in the outer space of the flat car 3 to reach a limit position in the chute 2. Wherein, the front end is the one end that spout 2 faced pre-buried steel pipe 1 depths, is relative with the operating end (rear end) that the technical staff was located.

The sliding groove 2 can be made of materials according to local conditions, and the sliding groove 2 with a proper size is made according to the size of the embedded steel pipe 1 or the construction space. The chute 2 comprises two sections of oppositely arranged angle steels, the two sections of angle steels are transversely welded into a whole through at least two connecting plates, and the chute is simple in structure, convenient, practical and low in cost. When one section of prefabricated spout 2 can't run through long pre-buried steel pipe 1 whole journey completely because the construction space restriction, can weld growth, the nimble construction to spout 2 in the work progress.

Further, the cutting device is a plasma cutting machine 9 (in the prior art, the plasma cutting machine is commonly used in workshops for carrying out hot working treatment on metal with the thickness of more than 0.3mm, such as cutting, welding, brazing, quenching, spraying and the like). The plasma cutting machine 9 comprises a case 91 and a plasma shooting gun 92, wherein the case 91 is connected with the plasma shooting gun 92 through a cable 93; when the device is used, the case 91 is arranged in the outer space of the embedded steel pipe 1, the plasma shooting gun 92 is fixed on the bracket 5 and positions the nozzle direction of the plasma shooting gun towards the inner wall of the embedded steel pipe 1, and the cable 93 is laid in the sliding groove 2. The case 91 is connected with an air compressor 10 for providing air pressure, and the movable three-stage distribution box 11 is adopted for supplying power to the plasma cutting machine 9 and the air compressor 10 respectively, so that the plasma cutting machine 9 can be started normally.

The slotting device extends into the embedded steel pipe 1 through the sliding chute 2 to provide a movable fixed platform for the flat car 3 in the sliding chute 2, and the sliding chute 2 can be made to be proper in length according to local conditions for construction; the expansion link 4 is used for propelling the flat car 3, so that the flat car 3 can run to the deep part of the embedded steel pipe 1 along the preset route of the chute 2, and the length of the expansion link 4 can be self-adjusted; utilize the fixed cutting device of bracket 5 on the flatbed 3, along with the steady operation of flatbed 3 cuts the embedded steel pipe 1 inner wall, cutting gap 12 is wide about 1 centimetre.

The slotting device for the underground steel pipes can efficiently cut the embedded magnetic steel pipes into the horizontal gaps 12 with basically equal intervals in the limited underground space, so that the purpose of disconnecting the closed magnetic circuit of the magnetic steel pipes is achieved, the problem that the closed magnetic circuit is formed when a three-phase single alternating current cable passes through the steel pipes to generate eddy current is avoided, and the problems that the cable is heated and the cable is burnt and damaged are solved. After the cutting is finished, the crater treatment is carried out, the gap 12 is rechecked, the cutting discontinuity phenomenon does not occur, and after the witnesses of the supervision and design units, all technical indexes meet the technical research target.

Example 2

Referring to fig. 5 and 6, the bracket 5 in embodiment 1 includes a boss-type base 53, a bearing 51 and a cylindrical top cap 52, the base 53 is welded on the flat car 3, the bearing 51 is nested on the base 53, the top cap 52 covers the bearing 51 and is nested on the boss of the base 53, and the top cap 52 is rotatable relative to the base 53; wherein, two opposite support ridges 54 are arranged at the waist of the top hat 52, and a hard iron wire is adopted to fix the plasma shooting gun 92. The adjustable bracket 5 can adjust the nozzle angle of the plasma machine, and the construction is flexible.

Further, a camera 6 is arranged at the rear of the flat car 3; camera 6 is through being close to the portable power source 7 power supply that flatbed 3 set up, and portable power source 7 is fixed in on telescopic link 4 through the sticky tape ligature, makes portable power source 7 and camera 6 can keep synchronous movement and have certain safe distance between with cutting device.

Before stretching into pre-buried steel pipe 1 with the slotting device of complete set, adjust camera 6 in advance to with cell-phone bluetooth network connection, utilize 6 equipment of camera to provide visual interface, with the inside slotting device operation conditions feedback of steel pipe to technical staff department. The complete set of slotting device is prepared according to the construction site environment, the nozzle of the plasma shooting gun 92 is positioned towards the inner wall of the steel pipe, the visual camera 6, the air compressor 10 and the plasma cutting machine 9 are started, the flat car 3 is pushed to advance at a constant speed along with the slotting process, the nozzle angle of the plasma shooting gun 92 is adjusted while the slotting operation is carried out by observing the visual interface fed back by the camera 6, the cutting quality and the cutting effect are ensured, the normal slotting speed is about 170 seconds/meter, and the slotting treatment of 6 steel pipes with the lengths of 5.5 meters and 1.8 meters at two positions is completed in one working day.

Example 3

Referring to fig. 7, the telescopic rod 4 of embodiment 1 comprises a plurality of sub-rods 42, and the plurality of sub-rods 42 are detachably connected with each other, so that the length of the telescopic rod 4 can be adjusted in a limited space and the telescopic rod can be used for deeply propelling the flat car 3. Specifically, the ends of the sub-rods 42 are provided with threads, and two adjacent sub-rods 42 are connected through a sleeve member 41 by threads, wherein the first sub-rod 42 is welded at the tail end of the flat car 3.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a slotting device for underground steel pipe, its characterized in that includes spout (2) and flatbed car (3), spout (2) are arranged in stretching into pre-buried steel pipe (1), flatbed (3) are located in spout (2), the one end fixedly connected with telescopic link (4) of flatbed (3), be equipped with bracket (5) on flatbed (3), bracket (5) are used for fixed cutting device.

2. Slotting device for underground steel pipes according to claim 1, characterized in that a camera (6) is also provided on the flatbed (3).

3. Slotting device for underground steel pipes according to claim 2, characterized in that the camera (6) is powered by a mobile power supply (7), the mobile power supply (7) being fixed on the telescopic rod (4).

4. Slitting device for underground steel pipes according to claim 1, characterized in that the carriage (5) comprises a base (53) and a top cap (52), the base (53) being fixed to the flatbed (3) and the top cap (52) being rotatably connected to the base (53); two opposite support ribs (54) are arranged on the top cap (52), and the support ribs (54) are used for fixing the cutting device.

5. Slotting device for underground steel pipes according to claim 1, characterized in that the telescopic rod (4) comprises a plurality of sections of sub-rods (42), the sub-rods (42) being detachably connected to each other.

6. The slitting device for the underground steel pipe according to claim 1, wherein the cutting device is a plasma cutting machine (9), the plasma cutting machine (9) comprises a cabinet (91) and a plasma shooting gun (92), the cabinet (91) and the plasma shooting gun (92) are connected through a cable (93), the cabinet (91) is located in the outer space of the embedded steel pipe (1), the plasma shooting gun (92) is fixed on the bracket (5), and the cable (93) is laid in the sliding chute (2).

7. Slitting device for underground steel pipes according to claim 6, characterized in that the cabinet (91) is connected to an air compressor (10).

8. Slitting device for underground steel pipes according to claim 1, characterized in that the front end of the chute (2) is provided with a limiting plate (8).

9. Slitting device for underground steel pipes according to any one of claims 1 to 8, characterized in that the chute (2) comprises two sections of oppositely arranged angle steel, which are welded together in a transversal direction by means of at least two webs.

10. Slitting device for underground steel pipes according to any one of claims 1 to 8, characterized in that the width of the flatbed (3) is adapted to the width of the chute (2).

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