Machine for pipeline cutting

FIELD: power engineering.

SUBSTANCE: machine for cutting of pipelines, preferably caissons from a storage tank, comprises a body and a rotor covering the cut pipe, with a metal cutting device fixed on it. The machine body is made in the form of a circular ball step-bearing, the fixed part of which is attached to the rotary board of the storage tank together with the drive for rotation of the movable part, coaxially and elastically fixed to the rotor flange. The rotor is made in the form of a cylindrical thin-walled hollow column that covers a caisson, with a rotary stem fixed on it, at the end of which a small-size driving cutting machine is attached with an abrasive disc.

EFFECT: creation of a reliable and comparatively cheap machine for cutting and trimming of pipelines, in particular, caissons in unavailable zones of radiation-hazardous facilities at the depth of at least 3 metres from the outer surface of the facility to provide for nuclear and radiation safety.

4 cl, 7 dwg

 

The invention relates to the field of nuclear energy, in particular to equipment and techniques for radioactive waste management, and can be used when implementing the process described in the document "Technology of cutting and unloading of the caisson with defective fuel tank starboard storage PTB "Lepse" GCLI 3330-035-2011", developed by JSC "find alternative solutions, as well as in the application for invention No. 2012124358/07(037296) 13.06.2012, the Invention can also be used for cutting pipelines in remote areas of the petrochemical and gas industry and General engineering.

Currently in temporary storage of spent nuclear fuel (SNF)located, for example, floating technical bases and ships with nuclear support (ATO), there is a large number of defective irradiated fuel assemblies (SFA), previously loaded into the temporary custody is not in a regular canisters, and caissons due to the high degree of destruction of these SFA and representing welded into the bottom of storage tanks, thin-walled cylindrical tubes (corpora) with diameter of 500 mm and above. Such stores include, for example, placebase "Lepse", in storage tanks 8 caissons are defective SFA.

Because of the maladjustment of the caissons for the storage of spent fuel assemblies during loading, it is impossible on the ensure nuclear safety step "grid" location SFA in the cavity of the caissons, therefore, the load was often done with the use of force on SFA, which resulted in damage to the fuel and suspension SFA, so using the regular methods of SNF impossible. Pulling SFA to such defects of the caisson can lead to further destruction and uncontrolled secretion into the environment of radioactive substances that will adversely affect radiation safety for personnel and the environment. Considering the above, the caisson together with loaded defective SFA, to be drawn from the storage tank using a special machine for cutting (trimming) the lower part of the casing (pipe) in conditions of high zaglublennosti and zataskannost for pass and installation of the cutting device.

Known pipe cutting device according to the patent of Russian Federation №2041032 C1, intended for cutting pipes and processing of the edges of thick-walled pipes for welding when performing repair work on power, heat, oil, and other objects in the field, as well as in engineering enterprises. Pipe cutting device includes a movable body configured to accommodate the girth of the processed pipe, with an annular shelf on one surface which has a support roller bearing movably the case, which is fixed to instrumental calipers with feeding screw and the cutting tool, and on the front surface, which is made from the flange, in which are placed, with free-slip digit circuit, a single row of links which interacts with stars, kinematically connected with the chassis by screws instrumental calipers, and the second with stars attached, respectively, to the output and input shafts of the gear drive feed and cone reference movement, the housing and also the housing of the main motion drive mounted on another end of the annular shelf stationary casing and the movable body is made a crown of internal gears that interact with the gear mounted on the output shaft of the main drive traffic associated with the engine, movable and immovable of the case is made detachable, and instrumental calipers and gear drive feed and cone reference displacements provided with mechanisms circuit-open kinematic chain.

The mass of individual components of the device allows you to perform the Assembly and disassembly of the entire device manually. Dimensions and design of the device does not allow its use in conditions of zataskannost and difficult access into the cutting zone.

The disadvantage of the disorder are limited technological capabilities. The device cannot be mounted and installed in working position with the passage through the previously cut, narrow, annular hole size from 500 mm and with limits of its width T=60-80 mm, what is the hole in the tube plate around the caisson, in the complex of zataskannost and cutting at a depth of not less than 3 metres. The size of the width of the annular hole is T=60-80 mm, since all floating technical bases and ships ate the distance between the wall of the storage tanks and the wall of the caisson matches the specified size.

Also known machine for cutting pipe for RF patent No. 2041030 C1 closest to the technical nature of the claimed and adopted as the prototype. The machine is designed for cutting pipes in the repair and can be used for cutting "coil" pipelines for the project. The machine includes a stationary split housing, drive covering the processed pipe, rotor, with a fixed spring-loaded holders, provided with adjustable in the radial direction by stops to set the desired depth of the groove, the holders of the rotor is made in the form of a cutting head and provided with a means to ensure optimal and constant depth of cut grooves made in the form of a spring plate radial flow, through which the tool holder is fixed is and the rotor, and roller located in front of the cutter in the same plane and having its profile, with adjustable stops holders made in the form of another roller located in a plane offset from the cutter and the first roller.

The disadvantage of the machine prototype is that its technological capabilities are also limited. The machine can not be mounted and installed in the working area with the passage through the narrow annular opening recyclable radiation-dangerous object on the depth of cutting of the casing (pipe) not less than 3 meters.

The objective of the proposed invention is the development of reliable and inexpensive machine for cutting or pruning of pipelines, in particular caissons, in the inaccessible areas of the radiation-dangerous objects at a depth of not less than 3 metres from the outer surface of ensuring nuclear and radiation safety.

The main technical result, which provides a task is the possibility of cuts or cutting of pipelines, primarily caissons, with high accuracy and with ensuring nuclear, radiation and industrial safety of operating personnel.

Obtaining the specified technical result is ensured by the fact that the machine for the cutting of pipelines, primarily to the military caissons from the storage tank, contains the body and covering the cut tube rotor with a fixed cutting device. In addition, the machine body is made in the form of a circular ball thrust bearing, the stationary part is fixed on the rotary plate of the storage tank with the drive rotation of the movable part, coaxially and elastically connected with the flange of the rotor has the form of a cylindrical thin-walled hollow columns, covering the caisson, with fixed thereto a rotary rod, the end of which is fixed a small drive cutting machine with an abrasive wheel.

Other differences are that: - cutting device representing the small-sized motorized cutting machine, equipped with:

- restrictive washer on the abrasive wheel;

swinging rod is provided with a fixing position;

- on the inner surface of the rotor near the cutting zone, a minimum of 3 spring-loaded ball retainers, with emphasis on the outer surface of the structure cutting caisson.

The execution of the vehicle body in the form of a circular ball thrust bearing with fixing fixed part on the rotary plate tank coaxially to the axis of the casing, and the movable part is coaxially elastically attached to the flange of the rotor, i.e. with a hollow thin-walled column, - assures proper alignment and precise smooth running (rosarot) columns around the caisson from the rotation mechanism, and the introduction coverage of the caisson column with a fixed rotary rod, provided at its end compact drive a cutting machine with an abrasive wheel,gives the opportunity to have a (omit) the column in a narrow width T=60-80 mm circular hole, and hold in the start box of the abrasive wheel in the wall of the caisson in its depth with the required cutting force and the subsequent circular whirling motion (twisting) of the cutting machine with abrasive wheel around the caisson, thereby to perform a full circular cut or trim the caisson.

Equipment abrasive wheels cars restrictive washer with a specified outside diameter provides for cutting the output of the abrasive disc to a certain predetermined depth of cut in the wall of the casing, thereby preventing the cutting edges of the abrasive disc to the inside of the casing and hence the impossibility of cutting defective fuel assemblies located in the caisson.

Equipment rotary rod device fixing the position when cutting abrasive wheel allows you to perform the initial box in the caisson stick force at a certain depth, and fix the rod and including a circular whirling motion (twisting) of the column, to produce a complete cut of the caisson.

Running on the surface of the rotor near the cutting zone at least three spring-loaded ball catches, with an emphasis on the outside is again caisson reduces runout of the rotor, thereby increasing the precision of the cut.

The invention is illustrated in the following graphic figures:

Figure 1 - General view of the machine for cutting caisson (pipeline).

Figure 2 - View And a top view of a machine for cutting caisson (pipeline).

Figure 3 - cross Section b-B, section gearing rotation of the movable part of the thrust bearing machine for cutting caisson (pipeline).

4 is a View, a view of the spring-loaded ball latch.

5 is a cross-Section G-G, installed on a column rotatable rod with a cutting machine.

6 is a diagram of the positions of installation of the machine for cutting caisson on the rotary plate.

Fig.7 is a Kinematic diagram of a machine for cutting caisson (pipeline).

Machine (1, 2, 3 and 7) represents the case made in the form of a circular ball thrust bearing 1, coaxially to the axis of the casing 2, and is fixed on the rotary plate 3 tank store your stationary part 4 together with the drive mechanism of rotation 5 of the movable part 6 of the thrust bearing, which is centered fastened with a ring gear 7 of the rotation mechanism drive 5 (i.e. mechanism of circular rotation). In turn on the ring gear 7 evenly spaced mounting 8 nodes with the passage through the hole D1 in the ring gear flange 9 fixed concentric rotor of the machine, representing a cylindrical thin-walled hollow column 10. On the column with the maximum is closer to the surface and parallel to the axis of the column in the bearings 11 mounted swivel rod 12 attached to the lower end of the stirrup-banding connection compact electric drive (straight or angled) cutting machine 13 (serial production) with a fixed abrasive wheel 14 with a restrictive washer 15; and the top swivel rod is equipped with a manual handle for input, rotating abrasive wheels cars cut in the wall of the caisson, and a clamping device 16 fixing the position of the rod with the index limb, i.e. cutting abrasive wheel in a caisson. Crown gear 7, which engages with the gear 17 of the mechanism of rotation of the actuator movable part 6 of the thrust bearing, which provides a circular flow of the cutting machine, and therefore abrasive wheels 14 around the cut or cutting caisson (Figure 4 and 5).

Covering the caisson, column 10 of the tubular design - which is the most optimal in the technological and prochesta relations, and objetivas mounted in the lower part of the column and near the cutting area three ball detents 18 on the outer diameter of the caisson, create the necessary rigidity to the column with the reduction of its beats in the cutting process of the caisson, and with it the upper part of the column spring-loaded mounting 8 nodes, connecting the column with the movable part 6 of the thrust bearing, is achieved accuracy, fluency passage and precision long column through the narrow dimensions T=60-80 mm annular hole D3 in the tube plate around the caisson, and adavale and sustainable precise turning with a cutting machine in the cutting process of the caisson on the large depth of the location of at least 3 meters

The sequence of installation positions of the machine and its operation is as follows:

In the beginning being installed, the fastening bolts 19 and alignment relative to the axis of the caisson ball thrust bearing 1 Assembly with the drive mechanism of rotation 5 and the toothed engagement of the crown 7 and the gear 17 (I, 6). Then I drop the column 10 in Assembly with the cutting machine 13 in the area segments or cutting caisson by successive passage through technological hole D2 rotary plate tank store next ring width T=60-80 mm hole D3 tube plate to the stop flange 9 columns with bore D1 in the ring gear 7 and the subsequent attachment with spring-loaded mounting of nodes 8 to the crown of the thrust bearing 1 (Position II-IV 6). Lowering the column 10 is then carried out using a crane with MicrodriveTM, and the control operation is performed using the TV's setup.

Optionally, if the dimensions of the machine 13 will be greater than the width of the slot T in the tube plate to pass is the corresponding local aperture is a slot. Then the machine is ready to perform pruning or cutting the wall of the caisson.

Then start the electric machine 13 and with a reversal of a hand crank swivel rod 12, a rotating abrasive circle 14 in the machine 13 is inserted into the wall cutting the constituent and cut caisson until it stops its bounding washer 15 in the wall, then this is the position of the rotary rod 12 is fixed clamping device 16, and then activates the drive mechanism of turn 5 (circular feed) cutting machine 13 to complete segments or cutting the wall of the casing set depth.

If necessary, the replacement abrasive disc 14 is accomplished by dismantling and lifting to the desired height above the rotary plate store, with the raising of the column is carried out with a crane with micromodem and control - using television installation.

In the end, pushing the machine to its original position from the cutting zone opposite the pivot rod 12, the machine is ready for removal.

The present invention provides a reliable and relatively inexpensive machine for cutting and trimming pipes, in particular of caissons in inaccessible areas of the radiation-dangerous objects at a depth of not less than 3 metres from the outer surface of the object with ensuring nuclear and radiation safety.

1. Machine for cutting pipe, mainly caissons from the storage tank, comprising a housing and covering the cut tube rotor with a fixed cutting device, wherein the machine body is made in the form of a circular ball thrust bearing, the stationary part is fixed on the rotary plate of the storage tank together with mechanismo the rotation of the movable part, coaxially and elastically connected with the flange of the rotor has the form of a cylindrical thin-walled hollow columns, covering the caisson mounted on it a turning rod, on the end of which is fixed a small drive cutting machine with an abrasive wheel.

2. Machine according to claim 1, characterized in that the cutting device has a restrictive washer with an abrasive wheel.

3. Machine according to claim 1, wherein the rotary rod is provided with a fixing position.

4. Machine according to claim 1, characterized in that the surface of the rotor near the cutting zone is set not less than 3 ball spring-loaded clamps with emphasis on the outer surface of the structure cutting caisson.



 

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