KR20120117025A - Endless helical corrugated tubing machine - Google Patents

Abstract

The present invention is particularly suitable for the pipe laying construction, which is essential for the long-distance transport of liquids or gases such as city gas, agricultural irrigation water, urban water supply water, and the like. It relates to a pipe making machine that significantly reduces construction air and construction costs in pipeline construction.

The pipe laying work currently under construction is based on the use of alloy materials of metal pipes, ie, general rolled steel or stainless steel sheets, as well as the form of manufacture of the pipes, ie, straight welded, spiral welded or spiral-locked. Regardless of whether all metal pipes are produced at the factory and cut to a certain length, the unit pipes are transported to the pipe laying site, and the unit pipes are welded one by one at the pipe laying site regardless of whether the length of the entire pipeline is 100 km or 1,000 km. They rely on the way they connect and complete the construction of the entire pipeline.

If we list the irrational points in the unit pipe welding method, the unit pipes are all hollow tubes, but because of their bulky size, the volume of the pipes loaded regardless of the weight of the pipes to be transported when the limited loading space of the vehicle is filled The unit pipe has the disadvantage of paying the steel freight while transporting the air because the air occupies most of the space of the packaged goods. Regardless of whether it is getting farther or closer, it is necessary to install and manage a unit pipe storage space every several tens of kilometers along the pipeline route, and to butt weld each other with the cutting surface of the final unit pipe and the cutting surface of the next unit pipe. Up to 10 times longer than ordinary welders for butt-joint welds The special welder who performs butt welding of pipes should be maintained at all times and civil works to compensate for the weakness of welding bead of butt welding become essential construction, and rainy weather, snowfall, cold weather Due to weather deterioration, there is no choice but to suspend work, and there is always a factor of increasing the construction period, and at every bending point of the pipeline laying line, it is frequently encountered in the extremely difficult situation of inclined cutting and butt welding. It is necessary to overcome the difficulties of cutting and welding the pipes to meet the site conditions according to the conditions that cannot be the same in every situation.There will be rivers, marshes, exposed rock, sea, and other terrains that are difficult to install on the pipeline route. In this case, it is inevitable that the construction of the route is inevitable and the length of the route is long. Are the elements which directly increases the construction time and construction costs.

The present invention does not construct the pipeline in the way that is currently used in the construction of all the metal pipelines around the world, that is, the unit pipes completed in the pipe factory are transported to the pipe laying site, and the unit pipes are welded together to complete the construction of the metal pipes. Endless helical corrugated endlessly completed from the pipeworking machine by moving the trailer loaded with the pipeworking machine itself to the pipeline construction site and moving along the pipeline laying schedule. It is about a machine that allows a tube to be installed directly in a pipeline construction site.

Existing tube machinery simply loads the machines into trailers and moves them to the construction site, so there are no machines with the conditions to lay the metal pipes produced from them.

The reason for this is that there are only two types of existing metal pipes, one of which is a straight line along the center axis of the pipe, and the other is a tape around the center axis of the pipe. It can be divided into the method of winding spirally welding in the same way as winding the wire or by the seam-locking method. In the case of the straight welding method, it is impossible to manufacture corrugated tube. Because of the structure, pipes coming out from the end of the pipe are not possible to install the metal pipes on site of the pipe making machine unless the horizontal and vertical pipes are completely flawless.

On the other hand, in the existing spiral corrugated pipe making machine, regardless of the welded pipe or shank method, the pipe that is being piped is rotated at the same speed as the rotating helical pitch, so the pipe laying site is basically laid. impossible.

The reason that the tube coming out from the existing spiral corrugated pipe making machine can be rotated at the same speed as the rotational speed of the spiral pitch. The reason for the formation of the conventional corrugated pipe itself is to rotate and move forward and backward according to the program. Supplying a metal strap, which is the material of the tube, to the outer surface of the mandrel, which repeats, at an appropriate inclination angle, and winding it, the strap wound on the mandrel naturally forms a spiral tube. This is because the tube is completed by welding the blade or hacking. The finished product can only be produced by rotating at all times. Therefore, the rotating metal tube cannot be directly installed.

The present invention is a spiral endless corrugated pipe tube making machine, which is not only a tube making machine in which the corrugated pipe coming out of a straight line is rotated, but also rotates. Regardless of whether it is curved or not, the pipe can be placed on site immediately after it is constructed.

In the conventional corrugated pipe making machine, the mandrel, which is the tube forming part, is wound up and finished as the material of the pipe is wound on the outer surface of the mandrel that rotates together as well as the forward and backward movements. Since the mandrel does not rotate but only forwards and reverses according to the program, it only pushes the finished pipe in one direction but does not rotate it, so the corrugated pipe completed from the pipe making machine can be directly placed on site. Will be.

In the present invention, the forming mandrel does not rotate, but the strap winding process for forming a spiral tube by winding the strap on the outer surface of the mandrel is performed by manipulating the coil and the strap forming roll-train that supplies the material strap of the tube. With the rally axis as the center of rotation, the orbital rotation is carried out like a satellite revolving around the sun, so that the strap is wound around the mandrel and the tube is not rotated. It is to come out.

Spiral welded tube 씸 Welded tube Seal locking Corrugated tube Spiral welded corrugated tube Metal tube pipe line construction

Description

Infinite continuous spiral corrugated tubing machine. {Endless helical corrugated tubing machine.}

Production of endlessly extending spiral corrugated pipes wound by metal straps on the outer surface of the mandrel and fabricated by welding or seam-locking.

Conventional metal pipes are formed by continuous molding through several stages of rolls installed in a row in the length direction of the metal strap to form a completely circular cross-section. In other forms of auxiliary devices, that is, the mandrel is formed in a hollow core form, and the two opposite edges of the strap are welded to form a straight tube, or a straight tube, and the metal on the outer surface of the mandrel. There is a method of spirally winding the strap. In the case of a spiral tube, which is a metal strap wound around the outer surface of the mandrel, the metal tube that is produced because the mandrel rotates and is connected to the outside of the machine It has a characteristic of being discharged.

In the case of straight pipes, the pipes produced are not rotated, but they are piped in a rigid straight line.

On the other hand, in the case of spiral pipes, rigid spiral pipes can be manufactured in which the outer surface of the pipe is simple and flat depending on the selection of the forming rolls of the supplied metal straps. Since the helix comes out and rotates as the mandrel rotates, it is also forced to cut the tube to a constant length in the final stage of the pipe for storage and transportation.

In the conventional method, both straight pipe and spiral pipe have a common point that the pipe must be cut to a constant length at the end of the pipe.

Therefore, when attempting to construct a metal pipe, if a metal pipe produced from an existing pipe making machine is to be used, the unit pipe produced at the factory and cut to a certain length is transported to the pipeline construction site to weld the unit pipes one by one. The reality is that there is no metal pipe construction method.

The cross section of the metal tube is precisely circular and the thickness of the metal disc from which the metal tube is manufactured shall not exceed 1% of the inner diameter of the tube, except in special cases.

In other words, if the inner diameter of the pipe is 1,000 mm, the metal thickness of the pipe is usually not more than 10 mm.

For a 1,000 mm diameter tube, the thickness is only 10 mm, but for a unit length of 10 m, the weight exceeds 2 tonnes. To store and transport this thin tube, keep the end of the tube intact and round. It becomes very difficult to do.

The work that needs to be carried out in the butt welding method is to lay the pipes. The pipes are already welded and installed deep into the ground and the pipes weighing more than 2 tons are dropped in three-dimensional space. Accurately facing the circle and welding are very difficult tasks.

Particularly in the case of curved laying connection welding, which must go along a curve rather than straight laying welding, the cross section of the opposite pipe to be welded is elliptical (

Iii) the task becomes more difficult.

All of these difficult working conditions are caused by the existing metal pipe production supply system, in which the unit pipes produced by the factory are transported to the pipeline construction site, where the unit pipes cannot be welded one by one.

The only way to eliminate the welding connection work in pipeline construction is to carry the piping machinery to the pipeline installation site and lay the pipes coming out from the machinery while loading them on the trailer or ship at the pipeline construction site.

However, metal pipes produced by existing machines are straight pipes with no flexibility, and metal pipes that cannot be laid anyway until they are cut to a proper length, or flexible spiral pipes, come out of the tube when the pipe from the terminal of the tube is rotated. Both installation systems are of no help in the installation site in that they cannot be installed on site.

The only way to solve this problem is to produce a flexible spiral corrugated pipe, but to minimize the machine coming out of a straight line without rotating at the terminal of the machine and to mobilize the transportation means to lay the metal pipe directly from the pipe laying site. The conclusion is that only.

The production of metal pipes with flexible spiral corrugated pipes, but the pipes come out in a straight line without rotation when it is completed and discharged from the terminal part of the pipe making machine.

In the present invention, instead of the forming mandrel of the tube rotating, the strap winding process for forming a spiral tube by wrapping the strap on the outer surface of the mandrel is performed by the entire coil and strap forming roll-train supplying the material strap of the tube. Has the mandrel axis as the center of rotation and makes the orbital movement like a satellite revolving around the sun, so that the strap is wound around the mandrel's outer surface so that the finished tube does not rotate in the direction of linear movement. It is only to be watched out.

When the endlessly extending spiral corrugated pipe is laid at the same time as the pipe in the pipeline installation site, the unit pipes produced at the factory and cut to a certain length are transported to the pipeline installation site. As a result, freight is saved by transporting coil stock to the pipe laying site instead of carrying a very bulky pipe compared to the weight, and there is no stockyard that needs to be installed and operated every few kilometers along the pipe laying line. This saves operating costs and saves labor costs by eliminating the need for special welding welders who have to pay up to 10 times more than ordinary welders. In the case of the construction of rigid pipes, it is necessary to install one every several km. It can omit the flexible coupling, which can omit huge cost, and it saves enormous cost by eliminating the inclined cutting of the pipe in the curved section and the oblique welding accordingly. Metal pipes can be laid while moving on a trailer or a ship, and work can be carried out almost without any interruption of work due to bad weather such as snow, rain, and strong winds. Compared with this, the construction period can be reduced to a level of up to 20%, and the overall construction cost can be greatly reduced, and the pipeline can be laid while the trailer moves along the GPS signal unless there is a special obstacle on the planned route. As the length of the route can be constructed in the shortest, construction cost is saved and the pipeline Even if the starting point is only a few meters above the finish point, the Cyphon principle allows water to be transported by gravity without the pump, so the construction cost is reduced first. Therefore, the maintenance cost is reduced, and when the pipe covering equipment is operated together with the pipe making machine, it is possible to produce a very long service life even if it is placed on the sea floor.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows the principle of a conventional spiral pipe manufacturing machine.

The metal strap 01 is pushed in the direction of the arrow 04 by the forming rolls 02 and roll 03 of the finished spiral tube 09 and the strap ( 01) is shaped so that the end face of the finished spiral tube 09 becomes the final target shape.

The mandrel (05) continues to move forward and backward as the arrow continues to rotate in the direction of the arrow (07). (09) It is to be discharged in the direction of the terminal part of the machine and during the retraction, the contact with the finished spiral tube 09 is disconnected and the finished spiral tube 09 can be retracted again. Do not.

The strap 01 wound on the mandrel is welded or seam-locked along the two-blade contact line 06 of the strap while rotating in the direction of the arrow 07 to complete the completed spiral tube 09 work. .

Therefore, since the finished spiral tube (09) coming out of the existing spiral tube manufacturing machine rotates and the tube is manufactured, the finished spiral tube (09) is loaded even if the manufacturer of the finished spiral tube (09) is loaded on a trailer and transported to the pipeline laying work. ) Can not be placed on site immediately.

2 is a front view and a side view of a forming roll close to the final cross-sectional shape among the various stages of forming rolls used for forming the finished spiral tube 09, and an upper roll on the left side. (10) and a front view of the lower roll 11 and the forming metal strap 12 are shown and the right axis shows the upper roll 10 and the lower roll 11 and the forming metal strap 12. A side view of is shown.

As shown in the example of FIG. 2, the metal strap 12 is in the form of a flat plate when initially supplied from a coil stock, but the cross-section of the final shape is stepwise through a plurality of forming rolls. It forms a corrugated tube, which is wound around a mandrel.

Fig. 3 is a straight spiral discharged without rotation when the flexible spiral corrugated pipe 22 which is piped by the present invention is discharged from the final metal pipe discharge part. Principle is also a principle principle.

Coil stock (13) and Progressive forming roll train (16) are loaded onto the satellite structure, and along the center line of the Mandrel axis (23) The spiral tube 22 is made by moving the metal strap 15 in the direction of the arrow 24 while winding the metal strap 15 over the mandrel axis 23 while rotating in the direction of the arrow 20.

At this time, two mandrels having the same outer diameter on the same axis and designed to be able to reciprocate independently of each other alternately move forward and backward when one mandrels forward. The other mandrel must be reversed.

If you reverse or change the direction of the mandrel to move forward, the mandrel changes the direction of movement to the reverse at the same moment.The two mandrels are equipped with chucks on the outer surface. When the wound tube is constructed, the chuck of the advancing mandrel bites and pushes the spiral tube 22, while the retracting mandrel releases the chuck so that the advancing spiral tube 22 is smoothly discharged from the machine.

The movement of the mandrel, which alternately moves forward and backwards and discharges the spiral tube 22 to the outside of the machine, is in fact a coil stock (13) and a progressive forming roll train (16). It means that the satellite structure (衛星 構造物) loaded with the moving at a constant speed in the direction of the arrow (24).

Therefore, the spiral tube 22 that comes out of the tube is in a state of staying in place and the tube tube is moved so that the spiral tube 22 can be laid and the spiral tube 22 can be laid on site as soon as it is discharged to the outside of the machine. On the other hand, the manipulating machine is the result of moving at the same speed as the tube discharge rate in the direction of the arrow 24, which is opposite to the discharge direction of the spiral tube 22.

That is, the tube tube machine continues to move in the direction of the arrow 24 at the same speed as the forward and backward movement speed of the mandrel, while the spiral tube 22 that comes out of the tube tube stays in its position. It is possible to install the pipe immediately.

The spiral pipe 22 can be welded by welding the spiral 21 according to the pipeline construction design, can be piped by the seam lock method, and the endless spiral corrugated pipe can be manufactured by any method. same.

Coil stock 13 has a large outer diameter, so that even if it is slightly loosened, the spiral stock 22 is formed so that it is much slower than the rotation speed of the continuous forming roll train 16 by a separate rotating device. The strap 15 is supplied while being released in the direction of the arrow 14.

4 is a cross-sectional view of the endless spiral spiral tube 27, and an enlarged cross-sectional view showing a practical example of the shank 25 in the upper right side of the spiral lock tube. An enlarged cross section showing an example of this.

Figure 5 shows that when the infinitely extending spiral corrugated pipe 27 is actually laid at the pipeline construction site, the convolution of the corrugated pipe is compressed at the curved section of the pipeline, and the wrinkle is expanded at the symmetric side of the compression point. When constructing the minimum inner diameter of the curve section, it shows the deformation state of the corrugation of the inner (29) and outer (28) of the conduit.

6 shows the impact-absorbing layer 31 using butyl rubber or the like on the surface of the endless spiral spiral pipe 27 and the braided reinforcing layer 32 and the corrosion resistance by using steel wire or the like. ) Is a cross-sectional view of producing an infinitely extending spiral corrugated pipe 27 for laying a seabed by adding a synthetic resin layer 33.

7 shows the infinitely extended spirally pleated pipe 27 for laying the seabed, and when it is directly placed on the seabed, the infinitely extended spirally pleated pipe 27 is the pipe making machine (35) the impact absorbing layer coater (36) and the steel wire reinforcement layer adder (37). Corrosion-resistant layer coater 38, etc. are also loaded on the vessel 39 together to produce the infinitely extended spiral corrugated pipe 27 in a consistent process while also constructing a subsea pipeline.

Figure 1 is a principle diagram of a conventional spiral pipe manufacturing machine.

2 is a front view and a side view of a forming roll near the final stage among the continuous forming rolls for spiral spiral tube production.

Figure 3 is a principle diagram of the spiral corrugated pipe according to the present invention.

Figure 4 is an enlarged cross-sectional view of the tube when the spiral corrugated pipe manufactured by the seam lock (Seam lock) method.

Fig. 5 is an adaptation state diagram of a curve section of the convolution of the spiral corrugation pipe when the spiral corrugation pipe is actually laid at the pipeline construction site.

6 is a cross-sectional view of the spiral corrugated pipe when the impact absorption, the steel wire reinforcement, the addition of the corrosion resistant layer is finished on the spiral corrugated pipe.

Figure 7 is a principle diagram when the seabed pipe laying at the same time as the piping while adding a corrosion resistant layer and the like on the spiral corrugated pipe.

Claims (1)

A metal strap formed by passing a metal-strap supplied from a coil-stock through a progressive forming roll train stepwise from a flat state to an outer diameter. The inner diameter of the metal tube to be manufactured is the same as that of the spiral, and the spiral is simply wound around the mandrel, which has the function of discharging the tube directly to the outside of the machine while repeating forward and backward according to the program. A metal strap is formed to complete a helical corrugated tube, and the formed strap is wound in a helical form on the outer surface of the mandrel to form a metal tube, and at the same time, the strap is wound on the mandrel. Weld the two closed blades together or join them in a seam lock method to connect the metal pipes, but the coil stock and the continuous roll are a single satellite device. It is installed on the upper side of the machine, and the endlessly extending corrugated pipe discharged from the machine is not rotated by the corrugated pipe being piped while making orbital operation with the mandrel axis as the center line. A tube making machine that is made to be continuously piped while going straight.

Images