CN1006570B - Method and apparatus for winding and sealing a pipe - Google Patents

Abstract

A tube made by helically winding a strip with several longitudinal ribs rising from the base of the strip and spaced transversely, one of the ribs has a spherical end and the other has a longitudinal rib Spherical socket, when the strip is wound, the socket and the ball head form a mutual pair, and all ribs or some ribs have appropriate empty grooves, so that the seams and ribs can be stretched to a certain extent in the transverse direction, and the grooves are composed of Tongue welt closure.

In various instances, the ribs take many forms, and in most cases the ribs are hollow and generally rectangular or semi-cylindrical, corrugated in shape.

Description

Method and equipment for wrapped forming and sealing of pipes

In the past; once the someone proposed to make strip with the method for plastics extrusion moulding; some perpendicular ribs along cross setting are arranged on this strip; form longitudinal groove between each rib; the length of strip is unrestricted; side in strip is provided with first joining portion, is provided with second joining portion at the opposite side or the opposite side of strip by the lining, and this layout type makes strip when making spiral wound; its first joining portion is locked in second joining portion; thereby make tubular element, the intensity of this tubular element is quite high, and length can be selected arbitrarily; it is had many uses; for example be embedded in it undergroundly so long, make buried pipe and use, the spirality rib of tube outer wall shields to pipeline.

The present invention does some improvement to this spiral wound structure of strip.

In the using process of this pipe of research, find that the perpendicular rib of its cross setting is very important, its reason, the one, by these ribs that outwards protrudes, make pipe obtain fabulous protection; The 2nd, can select the shape of rib, make pipe obtain good buffering; Moreover this shape of rib can realize the good interlocking between the adjacent overlap edge of strip, particularly realizes that to requiring this point of pipe of fluid-tight is particularly important; In addition, by adopting coextruded rib or strengthening the intensity that rib can improve pipe.As using every facilities such as Sha Ping, then rib is made the shape that helps every sand if desired, in case the grains of sand block the lyriform pore on pipe self wall.The present invention relates to various strip structures, these strips meet requirement of strength, and by the pipe that these strips are made, its usability increases.

The good bond method of a target of the present invention provides a kind of strip when making screw winding overlapping edges makes the joining portion firm, eliminates unexpected peril.

Another target of the present invention is further to improve its impact resistance on the basis of original structure.

Another target of the present invention provides a kind of existing high impact resistance, longitudinally has certain flexible pipe again.

Another target of the present invention is to utilize " memory " of plasticity, and locking is had an effect.

Another target of the present invention is to make locking firmly by using insoluble plastics or not having the thermofussion welding plastics.

An also target of the present invention provides a kind of strip shape, and it can be made into the sand prevention screen usually, or uses under trickle irrigation or similar applications.

Another target of the present invention is to make tube inner wall form quite flat continuous surface, and the strip of forming pipe has the vallecular cavity that forms between rib and rib, makes pipe structurally have extensibility.

First target of the present invention is the sealing problem about the pipe edge, and pipe is to be formed as spiral wound by strip, and the edge of strip overlaps joint mutually, and promptly when the pipe continuous reeling, strip rib on one side engages with the nest groove of strip another side.The present invention is particularly about overlapping the problem of Connecting format.

The present invention is a kind of pipe that is formed as spiral wound by strip, between every circle that strip is reeled overlap is arranged all, by first joining portion on the strip one side is connected on second joining portion of strip another side and its collocation, overlap is locked together, first joining portion and second joining portion are being spaced laterally apart setting, strip has some vertically perpendicular ribs that are spaced apart at least on one side, it is characterized by: the rib that forms first joining portion has a spherical termination, this bulb rib is arranged in pairs or groups to and is formed in the nest groove at second joining portion, one end of nest groove is by the strip opening, at least the second joining portion is resilient, can hold spherical termination with the clamping first joining portion rib, therefore, limited the extending transversely of strip, the joining portion can not thrown off at junction point.

The present invention also has other hollow rib, and strip can be stretched to increase its transversal flexibility, and the inside groove of these ribs has different shape.

Characteristics of the present invention are to use ligule edge strip covering joints, or when the rib inside groove passes through the strip opening, covering notch with this ligule edge strip, these ligule edge strips can seal notch, make the strip can be along lateral extension and contraction again, the pipe of being made by this strip can bear bending.

Therefore, the present invention has overcome the pipe and its adjacent side overlap joint that form as spiral wound with strip does not have flexible problem, has guaranteed the sealing of seam simultaneously yet, and guaranteeing does not in use not have the flexible inefficacy that causes because of pipe and seam.Pipe of the present invention has bigger drag for stress rupture, can be used as under ground piping, or the pipe of relative movement effect is arranged around being used for.

Fig. 1 is the part stereogram of the method according to this invention coiling pipe, dotted portion represents to make strip to become the feed cam roller of pipe and engage roller along spiral wound, has represented also among the figure that the guiding strip curls up into the several rollers in the permutation roller of pipe.

Fig. 2 is that enlarged view is faced in the end with ordinary construction strip shown in Figure 1.

Fig. 3 is the strip of band T shape rib, has form and locks preferably and hermetic unit, has a rib to have certain vertical adjustability shown in the figure, is embedded in undergroundly as this pipe envelope, can stand certain crustal movement, maybe can bear bending to a certain degree.

How Fig. 4 realizes the situation of interlocking and sealing when representing to become pipe with strip shown in Figure 3 as spiral wound.

Fig. 5, Fig. 6 and Fig. 7 represent to have the strip form of circular rib, have also represented the ligule edge strip of annular groove sealing simultaneously, and these ligule edge strips not necessarily need to use.Bonding state when Fig. 5 represents that strip is made spiral wound.

Fig. 8, Fig. 9 and Figure 10 represent the fourth shape rib of end band cavity.This rib makes the pipe periphery have elasticity.

Figure 11 represents to make fourth shape rib obtain elasticity by using the corrugated stud.

Figure 12 is the partial perspective view of section of a pipe, downcuts one section from pipe, forms drainage board through aligning.

This strip structure can change, but its general form is: some fourth shape ribs 2 of holding up and being spaced apart from its basal plane are arranged on strip 1, have outer end 3, the limit end rib bar 4 of strip is shorter than remaining rib 2, form first joining portion, so that be fitted in the nest groove 5 of rib 6 of contiguous strip 1 another side, the latter forms second joining portion, outside rib 6, strip 1 is outwards gone back and is extended upward, form tight lock part 7, when strip was wound into pipe, it was rabbeted below adjacent rib.

Rib 4 has spherical termination 8, in the nest groove 5 of packing into, vertical expansion groove 9 in order to the spherical termination 8 of connection rib bar 4 is arranged in the nest groove 5, rib 4 and rib 6 are made the spherical termination 8 that can make rib 4 and are pressed in the nest groove 5, spherical termination 8 is securely held in the groove 9 that has swollen, even rib 6 stands certain motion or distortion, connect herein and also can not throw off.

The spherical part 8 of rib 4 can have a side plane 10, it defines the space in the nest groove, as Fig. 4 clearly shown in, like this, feasible connection is easier, and in the junction, because the volume expanded and the pressure that form as labyrinth seal fall, thereby realize the sealing of convection cell, this plane stretches jointly with the rib of contiguous strip one side.

In rolling the process of pipe, by a pair of driven roller 11, strip 1 is sent to, forward after spooling first lap, roller 13 actions of joint roller 12 on the strip another side by the back, the overlap edge of strip is pressed together, further improve pressing locking property, roller 14 and roller 12 co-extension by differential roller 14, but its actuating speed and roller 12 are slightly different, be beneficial to being laminated of joining portion, and, help strip to curve pipe owing to force in strip.

One permutation guide rollers 15 is arranged, among the figure a few only is shown, these rollers are arranged continuously along first lap, and these belong to known technology.

As can see from Figure 1, making of strip in the process of pipe, the rib 4 of forming first joining portion will align with the nest groove 5 in the rib 6 of forming second joining portion, when strip is made screw winding, roller 12,13 and 14 locks onto one side pressing of strip on the another side of strip, meanwhile, the tight lock part 7 of strip be pressed together on adjacent perpendicular rib 2 fourth shape part 3 below, be beneficial to the interlocking of strip dual-side, this can know from Fig. 4 and find out.

The another side of strip has the ligule edge strip 16 of sealing usefulness, and when strip was wound into pipe, it stretched the zone that covers rib 4 and rib 6 mutual connections.

Ligule edge strip 16 is placed against strip 1, and be pressed on the strip 1 by means of tube fluid pressure, can be provided with corrugated surface of contact 17 on the edge strip, to form the labyrinth seal of fluid, in the 17 recessed strips 1 of surface, surface 18 is provided with in a similar fashion, thereby can be attached on the rib 4 and the surface between the adjacent rib 2 of strip 1, as shown in Figure 4.

Ligule edge strip 16 can have the sealing surfaces that is similar to rubber, after strip is reeled, it contacts with the surface 17 of strip 1, or can adopt the elastomeric plastics that is compressed on the rigidity base bar in this position of strip, thereby provide firm efficient sealed, ligule edge strip 16 is glued on the joining portion of strip.

See tight lock part 7 again, obviously, when the one side and the another side of strip are arranged in pairs or groups, the rib at joining portion and nest groove are when easily pressing together, and 7 whiles of tight lock part also can be placed in the space that locks between joining portion and the adjacent fourth shape rib at an easy rate.Must make each mating part its former junction point when entering locked position in conjunction with rib keep mutual connection and locking by tight lock part 7 formed these second locking joining portion with respect to it.The rib that is connected with it can have a hook-shaped protruding terminus in addition, as Fig. 4 dotted line represent 18 shown in, owing to the rib compressive deformation makes tight lock part 7 in place, when pressure discharges, rib 2 reset and form second the locking position.

When the overlap edge of strip enters locked position,, can form sealing by connecting embedding sealant tape 19 between the rib at tight lock part 7 and its.

Strip body among Fig. 3 and Fig. 4 and Fig. 1 are similar with strip body among Fig. 2, but a rib 2A is arranged on the strip body of Fig. 3 and Fig. 4, though it also has fourth shape end 3, but trough of belt 20, it is flexible that this makes this strip have more than the strip among Fig. 1 and Fig. 2, and butt joint place flexible also has similar influence.

Can see that rib 2A shown in Figure 3 is a double-walled, forms inside groove between two walls, inside groove,, then can be deepened the interval of double-walled 21 and 22 if require amount of deflection bigger by the basal plane opening of strip 1 in the perpendicular end sealing of rib, reaches most of rib heights.

If inside groove 20 needs sealing, then go out the similar edge strip of a slice effect and ligule edge strip 16 from inside groove is extensible on one side, engage with the strip of inside groove another side.

Hollow rib can change shape, as shown in Figure 5 and Figure 6.

Inside groove 24 shown in Figure 5 can make strip 1 can longitudinally stretch and shrink when needed, and this structure also is a double-walled, has sidewall 25,26 peaceful roofs 27, and inside groove 24 is covered by ligule edge strip 28 by strip face opening.

Ligule edge strip 28 is attached to by prestressing force on the basal plane of strip, both can smooth internal surface be arranged again so that pipe is flexible.

End rib bar 27A is connected with the spherical termination 29 of strip, and tight lock part 30 is used for limiting wall 25 outside deflections, and sealing compound 31 can place on the tight lock part 30 as shown in the figure.

Form shown in Figure 6 is: it is corrugated that rib is that the interior wall 33 by the exterior wall 32 of semicircular cylindricality and near cylindrical is formed by connecting, and it also has corresponding to 28 such ligule edge strips 34, in order to sealing inside groove 35.

Also represented in the figure in inside groove 35, to embed solid mixture or elastic material 38, or 39 places, the space between inside groove put into reinforcing material, as can the stretch elasticity rod 41 of fuse 42 of core bar 40 or interior dress.

Sealant tape 19 as shown in Figure 4 also can be used in the described any type of structure, with further raising locking property, prevents to connect and loses efficacy.

In structural type shown in Figure 6, rib end 32 band arcs are when being subjected to upholding load, self plays spring rib, make the rib outer end that a small amount of moving be taken place, and motion can not reach the inner end that rib connects strip, this good stress distribution mode helps locking.

As plan this strip is made sand prevention screen or similar goods, then only need cut out some kerfs, preferably traverse the curved portion of strip, and because this part of strip is arc, be penetrated in the formed groove of inside groove thereby make, so each groove all has a plurality of slots, heads straight for the basal plane part that passes to these article.The suitably perforate of ligulate edge strip of closed ribs the inner, so that fluid is flowed in the pipe of so making, this pipeline maybe can be made waste pipe usefulness, by the outflow of two-layer through hole control liquid stream.

The above-mentioned back a kind of form of the present invention is taked the form of circular rib 45 as shown in Figure 7, defines vertical inside groove 46, and the bottom of circular rib is covered by ligule edge strip 47, and ligule edge strip 47A represents to have lifted a bit, demonstration strip characteristic of telescopic.

Narrow groove 48 is the grooves along the transverse distribution of rib 45, porose or lyriform pore 49 in the edge strip 47 that stretches out, and when making helical coil coiled pipe with this strip, sand is intercepted by hole, groove, and water is then from then in the intake channel.

If plan sealing inside groove 46, then the form of ligule edge strip 47 desirable 47B seals, and the ora terminalis of 47B has head 51, in order to be locked in vertical nest groove 52.

This form also can be used for irrigation system, and water is flow through from hole or lyriform pore 49, and it also can be used as the duct of measurement of discharge, distributes the water yield in the soil by narrow groove 48.

In Fig. 8, Fig. 9 and form shown in Figure 10, the form that can absorb impact is made in the outer end of rib 53, as the fourth shape end 54 of expansion is being set away from strip matrix place, form some hollow-core constructions, this part structure both can be made into the form of airtight as shown in Figure 8 groove 55, can be made into again as shown in Figure 9 by the necking down shape part 56 of horizontal extension and the form of forming from rib 59 overhanging fourth shape ends 58, or rib end as shown in figure 10 also has the form of two built-in arcuate wall 57, and why rib 53 can absorb and impact is because they have required elasticity.

The upright rib 60 of fourth shape rib shown in Figure 11 is corrugated, and the end 61 of rib is flat, and this form has certain elasticity, and the available buffer effect of impact is in order to avoid bump reaches rib self basal plane place.

Filling material can easily inject after strip is shaped, or when the injection moulding strip it is embedded; Do not need the stretchability part in strip,, both can be in injection moulding process enough carry out when mobile, can bond again afterwards yet or form locating piece when material herein still has to the secure seal of ligule edge strip.

When this strip is done the spiral wound shaping, because strip has perpendicular rib and the basic shape of himself, can know that strip itself is to be in tensioning state, so guarantee that its rigidity is much larger than common cylindrical shaped body.Moreover, because rib is mostly to overhanging, may also inwardly stretch in certain occasion, perhaps inwardly stretch simultaneously and to overhanging, this is improved its intensity, also can in inside groove, fill or partially filled suitable material as shown in Figure 6, structure is enhanced, or in the groove of band gap orifice plate band, porous materials is set, and realize high efficiency filter, this filter material is illustrated in the inside groove of Fig. 7.

To recognize also that simultaneously the structure of rib both can adopt the form of traditional trough of belt or analogous shape, again can wire or nylon wire or similarly wire rod in going into these grooves, further strengthen structure.

Have found that, according to described all structures, can correspondingly produce the various pipes that use under pressurized or the non-transformation situation, as sewage pipe, phone wire pipe and similar pipe, but these pipes will consider to bear the variance factor of earth load in design, for the pipe of given length, weight was differed reached 35%～40%, still provided same variance factor.

Therefore, as required, can regulate extrusion process, to make the strip of composite material, making it all has bigger anti-deflection rigidity at other angle directions of the upright rib direction ratio of rib, therefore, and the pipe that is wound into this strip, at least at the available rigid material of its rib structure part, tube wall itself then can be with flexible bigger material.

In form shown in Figure 12, its rib is to make corrugated rib 65, have sealing ligule edge strip 66, its layout type and Fig. 5, Fig. 6 and shown in Figure 7 similar, but this diagram is that pipe is become flat board from vertical incision and through aligning, can be used as every native drainage board or similar baffle plate, the water that infilters in the groove 67 is discharged from groove, the edge 68 of ligule edge strip 66 is that corrugated permission water is gone in the groove 67 from the edge strip surface current.

For preventing longitudinally to slide between the adjacent volution of pipe, can be along horizontal ripple or add flexuose ridge muscle and groove in addition, their shape and position can be varied, as corrugated part 70, make the lower surface of tight lock part 7 be corrugated, match with the ripple 72 of strip 73 place's upper surfaces.Equally, on spherical part 8 He in the hole slot 9, can form the mutual connection flange.

Claims (20)

1, a kind of strip that is used to make pipe, can be used for spiral wound, make and form the edge section of overlap joint mutually on the strip, and by being connected with second joining portion that first joining portion is spaced laterally apart on first joining portion on the strip one side and the strip another side, the overlap joint edge section is locked together, thereby turn to pipe; The rib that some vertical trends are arranged on the strip is holded up on the slave plate tape base face, and is opened along its transverse distribution; Being characterized as of strip:

In these ribs, there is a rib to constitute described first joining portion, this rib has spherical termination;

Another rib has vertical spherical nest groove, constitute described second joining portion, this nest groove is by strip basal plane opening, when aforementioned bulb rib is rabbeted with it, the nest groove can swell, so make the connection at two joining portion obtain locking, therefore, allow the cross extending of certain limit in the junction and do not cause separation of joint;

Adjacent to place, aforementioned joining portion, second locking element is arranged, comprising:

Outside above-mentioned strip nest groove rib, an expandable part is arranged, when strip was made spiral wound, this part can be rabbeted with adjacent rib.

2, press the strip of claim 1 defined, its another feature is: the side at described rib spherical part has a planar section, this planar section basically with the stud co-extension of rib adjacent plate belt edge one side, thereby help connection and the sealing of rib in the nest groove.

3, press the strip of claim 1 defined, it is characterized by: a side of slave plate tape base face in abutting connection with place, first joining portion, stretches out a ligule edge strip, the setting of this edge strip is in order to cover the seam that first joining portion and second joining portion are formed, this seam is further sealed.

4, by the strip of claim 1 defined, it is characterized by: it is hollow having a rib at least, and this rib therefore, allow the strip transversal stretching, thereby the pipe that this strip is made can meet with stresses and limited bending by the basal plane fluting of strip.

5, by the strip of claim 4 defined, it is characterized by: this rib is " U " shape, and its groove is by the basal plane opening of strip.

6, by the strip of claim 4 defined, it is characterized by: this rib has the arcwall that separates, and to form vertical inside groove, this inside groove is by the basal plane opening of strip.

7, use the pipe of making by the strip of claim 1 defined, it is characterized by: after screw winding, the expandable part of above-mentioned rib and with its rib that is halved together between can add to seal and use Inset.

8, use the pipe of making by the strip of claim 4 defined, it is characterized by: on one side strip has the ligule edge strip that stretches from inside groove, this edge strip can not only seal and inside groove after the strip another side is connected, and allows the strip transversal stretching.

9, press the strip of claim 1 defined, it is characterized by: the vertical dead slot of at least some rib bands, these dead slots are by the basal plane opening of strip, the ligule edge strip that is stretched on one side by dead slot seals these dead slots, the ligule edge strip at random abuts the strip basal plane place of dead slot another side, by the seepage flow aperture, allow liquid to flow in the dead slot.

10, by the strip of claim 9 defined, it is characterized by: be tunneled to dead slot in the pipe that this seepage flow aperture can be made from strip, and be tunneled to dead slot by the rib wall from managing outside, therefore, these dead slot may command flow into and out of the liquid of pipeline.

11, by the strip of claim 1 defined, it is characterized by: its perpendicular rib has hollow outer end, therefore can cushion the pressure that is reached the strip basal plane by rib.

12, by the strip of claim 11 defined, it is characterized by: this rib is " fourth " shape, and the head of its extending transversely and strip basal plane separate, and are hollow.

13, by the strip of claim 11 defined, it is characterized by: this rib is " fourth " shape, and its extending transversely partly has a cavity at least, and end wall is an arc, can play buffer function to the pressure that reaches this rib outer end.

14, by the strip of claim 1 defined, it is characterized by: this perpendicular rib is " fourth " shape, and its rib stud that outwards stretches is corrugated, can cushion the pressure of biography to the strip basal plane.

15, press the strip of claim 1 defined, it is characterized by: rib forms waveform, each rib is sealed on the another side of strip by the ligule edge strip at band corrugated edge, edge strip is by pasting the basal plane of rib, form drainage means, water is entered, in vertical dead slot of forming by waveform rib and ligule edge strip from the one side of strip band ligule edge strip.

16, by the strip of claim 1 defined, it is characterized by: at the mutual overlap of strip, can be corrugated or add the ridge muscle along laterally adding system, in order to avoid length travel occurs between each circle.

17, (rib is being spaced laterally apart with the strip of being with perpendicular rib, move towards setting along vertical) during the coiling pipe, its making and encapsulating method are: when strip is made spiral wound, on first joining portion and strip another side on the strip one side, laterally be connected with second joining portion that first joining portion separates, the longitudinal edge portions of strip is overlapped, lock together; It is characterized by:

The longitudinal rib of the dribbling shape termination of forming one of above-mentioned joining portion is connected in the expansion nest groove of the rib of forming another joining portion.

Squeeze another joining portion of expanding when the one joining portion, when embedding locked position, have at least the size at a joining portion to change, thereby make the joint can bear certain stretch amount and the unlikely disengagement of seam; Connect for further strengthening, adopt second tight lock part, at contiguous nest groove but locate to establish rib from a distance, further clamping and the sealing part of overlap joint mutually.

18, by the method for claim 17 defined, it is characterized by: the order sealing is stretched out outside a side direction of the vertical mutual connection rib of strip band with the ligule edge strip; To be sealed edge strip by the seam that the joining portion forms thus covers.

19, by the method for claim 17 defined, it is characterized by: have a vertical dead slot on the strip at least, this dead slot is by strip basal plane opening, so allow the strip transversal stretching.

20, by the method for claim 18 defined, it is characterized by:

Make the stretching, extension of ligule edge strip and cross above-mentioned dead slot;

This ligule edge strip is placed on the strip basal plane, seals this dead slot.

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