CN100567787C - Plastic conduit - Google Patents
Plastic conduit Download PDFInfo
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- CN100567787C CN100567787C CNB200510113858XA CN200510113858A CN100567787C CN 100567787 C CN100567787 C CN 100567787C CN B200510113858X A CNB200510113858X A CN B200510113858XA CN 200510113858 A CN200510113858 A CN 200510113858A CN 100567787 C CN100567787 C CN 100567787C
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- prominent bar
- plastic conduit
- outer tube
- pipe
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Abstract
The invention provides the level and smooth plastic conduit of a kind of inner and outer surface, the part that links peak portion on the outer tube is smooth can to intercept water reliably thereby it makes under the situation of not damaging ductility.A kind of plastic conduit is characterized in that, has: interior pipe (2) forms by banded synthetic resin is wound into helical; Spiral reinforcing part (4), the synthetic resin material by will being shaped as prominent bar (3) are wound up into as outside helically with the peak portion of this prominent bar (3) on the trunk outer wall of interior pipe (2) and form; Banded plastic outer tube (5) is provided with about part or all of the prominent bar arranged along tube axial direction, links the peak portion (3a) of above-mentioned prominent bar along tube axial direction; Outer effective conformal parts (10) are embedded in the outer tube (5) or are attached to outer pipe internal surface one side, and outer tube (5) is carried out conformal and makes it smooth, are formed by band metal thin plate; Should reel with the state that in the peak portion (3a) of prominent bar (3), separates predetermined distance by outer effective conformal parts (10), and be erected in the peak portion (3a) of prominent bar of adjacency.
Description
Technical field
The present invention relates generally to a kind of underground plastic conduit that is embedded in, and particularly a kind of inner and outer surface is level and smooth and pass communication in pipe, energising is used pipe and the plastic conduit of use with cable or as upper and lower water course.
Background technique
In order to bear, used smooth interior surfaces and the plastic bellows that on tube axial direction, alternately forms of peak portion and paddy portion on the outer surface from inside and outside stronger pressure in the past.
So this bellows is owing to have on the outer surface that concavo-convex, the resistance when pipe laying is big to be difficult to construction successfully, again, under pipe situation connected to one another, concavo-convexly guarantee that intercepting water property needs special joint construction for burying this.
Therefore, propose a kind of synthetic resin, it is coiled into resin strip by the state last volume in the peak portion that links bellows and sets up outer tube, makes outer surface roughly level and smooth.(for example opening flat 8-258177 communique) with reference to the spy.
This plastic conduit significantly diminishes and has improved application property thereby draw in resistance because outer surface roughly forms smoothly, again, compares with bellows in the past, has also improved the intercepting water property of joint.
But, in above-mentioned plastic conduit in the past, owing to when plastic conduit hardens, produce the contraction of tube axial direction, so the part that can not avoid linking peak portion in the outer tube is deformed into bent state.If this degree of crook is bigger, then can not realize making the purpose of the outer surface smoother of plastic conduit.
Also consider for the distortion that prevents outer tube to thicken outer tube wall, but if so, can increase the weight of plastic conduit and ductility is reduced.
Summary of the invention
The present invention considers the problem in the above plastic conduit in the past and makes, and provides a kind of inner and outer surface level and smooth plastic conduit, its reduction and can preventing that can suppress ductility link in the outer tube peak portion part distortion and intercept water reliably.
Plastic conduit of the present invention has: interior pipe forms by banded synthetic resin is wound into helical; In being wound up into as outside helically with the peak portion of this prominent bar, spiral reinforcing part, the synthetic resin material by will being shaped as prominent bar form on the trunk outer wall of pipe; Banded plastic outer tube, part or all setting about the prominent bar arranged along tube axial direction, link the peak portion of prominent bar along tube axial direction, outer effective conformal parts, be embedded in the outer tube or be attached to outer pipe internal surface one side, outer tube is carried out conformal and makes it smooth, form by band metal thin plate; Should reel with the state that in the peak portion of prominent bar, separates predetermined distance by outer effective conformal parts, and be erected in the peak portion of prominent bar of adjacency.
According to the present invention, the outer effective conformal parts that dispose under the state of striding prominent bar make outer tube keep smooth, make outer tube indeformable so can resist this external force under the situation that plastic conduit is applied external force.Can keep the flexible of plastic conduit by the interval that regulation is set again.
Among the present invention, if the outer tube by the conformal flatly of outer effective conformal parts only is arranged on the two end part of the interior pipe that is wound with the spiral reinforcing part, then under plastic conduit situation connected to one another, for the tube end that becomes the joining portion, the connection operation is oversimplified also can be improved intercepting water property, except that joint, just has the interior pipe of spiral reinforcing part, so can realize lightweight.That is, can suppress the increase of plastic conduit weight and the withstand voltage flat intensity of raising specific part.
If on the spiral reinforcing part, set up the stiffening element that forms by thin metallic plate, then can further improve the withstand voltage flat intensity of plastic conduit among the present invention along prominent bar again.
Again, among the present invention, if in the peak portion of prominent bar, be formed for the end difference that the tube axial direction edge portion to the above-mentioned outer effective conformal parts of reeling positions, then outer effective conformal parts can be configured in exactly in the peak portion of the bar of dashing forward, can further improve the smoothness of synthetic resin tube outer surface.
Again, among the present invention, if with above-mentioned stiffening element accordingly, burying internal pipe in above-mentioned in the pipe underground carries out conformal and makes its smooth interior effective conformal parts that formed by thin metallic plate, then be applied on the plastic conduit external force can by the stiffening element of outer effective conformal parts, spiral reinforcing part, and in effective conformal parts bear, can improve withstand voltage flat intensity.
Again, among the present invention, all within it sides of stiffening element have a pair of foot, and in this case, interior effective conformal parts preferably dispose in the mode that links this a pair of foot along tube axial direction.
Again, among the present invention, the all within it sides of stiffening element have a pair of foot, in this case, an if warpage on tube axial direction in its foot, and the trunk outer wall along interior pipe extends the prominent bar that is set to adjacency, then can be strengthened spiral reinforcing part and interior pipe simultaneously by a stiffening element.
Again, among the present invention, the predetermined distance that is arranged at outer effective conformal parts can form the weld portion of outer tube and spiral reinforcing part.
Among the present invention, the raw material as each synthetic resin that constitutes plastic conduit can use synthetic resin raw material such as polyethylene, PVC, polypropylene.
As the stiffening element of effective, interior effective conformal parts and spiral reinforcing part outward, can use the thickness that is cut into band plate-like to strengthen band plate and processed goods thereof as metals such as the iron plate of 0.2mm～2mm, corrosion resistant plates again.
Again, will above-mentioned effective, interior effective conformal parts outward and the parts that coat of above-mentioned stiffening element if use with the resinogen material identical with above-mentioned synthetic resin raw material, then by can improve the cementability of outer tube and spiral reinforcing part, this spiral reinforcing part and interior pipe respectively to this resin-coating layer heating and melting.
Again, among the present invention,, can constitute rectangle, square, trapezoidal, triangular shaped square wave, also can constitute the round ripple of semi-circular shape as spiral reinforcing part and to the prominent bar on its stiffening element of strengthening.
According to plastic conduit of the present invention, thus intercepting water property can be improved owing to outer tube can be kept smooth, and do not need miscellaneous operation just a plurality of pipes can be connected to each other.Again, thus needn't sacrifice flexible, just can resist and withstand voltage flat intensity is improved the plastic conduit externally applied forces.
Description of drawings
Fig. 1 is the side view of the local excision that constitutes of the integral body of expression plastic conduit of the present invention.
Fig. 2 is the A portion amplification view of Fig. 1.
Fig. 3 is the figure that is equivalent to Fig. 2 that outer effective conformal parts are embedded in the plastic conduit of outer tube.
Fig. 4 is the figure that is equivalent to Fig. 2 of the variation of expression spiral reinforcing part.
Fig. 5 is the figure that is equivalent to Fig. 2 of the spiral reinforcing part of the positioning part that effective conformal parts were used outside expression had.
Fig. 6 is the figure that is equivalent to Fig. 2 of the variation of expression spiral reinforcing part shown in Figure 5.
Fig. 7 is a side view of representing only to have the formation of the outer tube of being with outer tube conformal parts on the end of plastic conduit.
Fig. 8 is the side view of local excision of the coupled condition of expression plastic conduit.
Fig. 9 is the major component amplification view that expression is arranged at the formation of the filler on the corrugated tube end.
Figure 10 is the end view drawing of the connection side end of expression plastic conduit.
Figure 11 is the sectional view that expression connects the structure that intercepts water of side.
Figure 12 is the figure that is equivalent to Fig. 2 of formation of the spiral reinforcing part of expression band stiffening element.
Figure 13 is the figure that is equivalent to Fig. 2 of formation that guarantees the interior pipe of shape parts in the expression band.
Figure 14 is the figure that is equivalent to Figure 12 of the variation of expression spiral reinforcing part.
Figure 15 is the figure that is equivalent to Figure 12 of the spiral reinforcing part of the positioning part that effective conformal parts were used outside expression had.
Figure 16 is the figure that is equivalent to Figure 12 of the variation of expression spiral reinforcing part shown in Figure 15
Figure 17 is the sectional view that is illustrated in the variation of the stiffening element of setting up on the spiral reinforcing part.
Figure 18 is an explanatory drawing of representing the state of the contraction that takes place in the manufacturing of plastic conduit in the past.
Figure 19 (a) is the side view of local excision of representing the coupled condition of bellows in the past.Figure 19 (b) is the enlarged view that connects the end.
Embodiment
Below, the present invention will be described in detail based on the mode of execution of accompanying drawing.
The outer tube of a band outer tube conformal parts is formed on pipe plastic conduit on the whole
Fig. 1 is the figure that the integral body of expression plastic conduit of the present invention under the state of its section of local excision constitutes.
The interior pipe 2 that plastic conduit 1 has smooth interior surfaces by the banded synthetic resin of reeling is formed with spiral reinforcing part 4 thereby form prominent bar 3 with the pitch helically of stipulating on the trunk outer wall of pipe 2 in this.Outer surface superiors 3a of portion and the 3b of paddy portion at interior pipe 2 alternately forms on tube axial direction thus.
Again, the mode with the 3a of peak portion that links these prominent bars 3 is formed with outer tube 5.
In addition, the hollow portion that 6 expressions are divided into by prominent bar 3 and interior pipe 2 among the figure, the hollow portion that 7 expressions are divided into by prominent bar 3 and outer tube 5.In addition, 8 is ends of plastic conduit 1 among the figure, the 9th, and another end.
Fig. 2 is the figure of section that amplifies the A portion of presentation graphs 1.
Dispose the spiral reinforcing part 4 that is formed by prominent bar 3 among this figure between interior pipe 2 and outer tube 2, the internal surface of outer tube 5 is provided with and is used to make its outer surface maintenance smooth and improve the outer effective conformal parts 10 that the thin metallic plate by band shape of withstand voltage flat intensity forms.
In more detail, the interval that outer effective conformal parts 10 separate regulation is wound into helical, and its width m is set at the length on the 3a of peak portion of the prominent bar 3 that can be set up in adjacency.
Again, outer effective conformal parts 10 be wound into can and the outer effective conformal parts 10 of adjacency between guarantee gap (interval of regulation) w
2, and this gap w
2Be positioned at the substantial middle position of the 3a of peak portion, thus, by above-mentioned gap w
2Make 3a of peak portion and outer tube 5 weldings.
As outer effective conformal parts 10, from the viewpoint of outer tube 5 being given enough intensity, can use light sheet materials such as iron, stainless steel again.Again, the thickness of outer effective conformal parts 10 is according to the material of selecting and difference still is generally just enough about 0.2mm～2mm.
Again, from improving the viewpoint of cementability bonding on 3a of peak portion or outer tube 5 respectively, available as shown in Figure 3 and resin spiral reinforcing part 4 similar (particularly of the same race) coats outer effective conformal parts 10.
In addition, about having the interior pipe of above-mentioned spiral reinforcing part 4, owing to come down to identical formation with in the past bellows, so the manufacturing equipment of bellows in the past can directly use.
Again, in plastic conduit in the past, as shown in figure 18 owing to only on prominent bar 56, be overmolding to tubulose with banded synthetic resin, so, the synthetic resin that coats can produce contraction when sclerosis takes place, and outer tube 57 bends between the prominent bar 56 of adjacency, has produced concavo-convex outside on the tube-surface.In addition, the 58th, the stiffening element of the prominent bar 56 of reinforcement, the 59th, interior pipe.
Relative with it, in plastic conduit 1 of the present invention, as Fig. 2 or shown in Figure 3, because outer effective conformal parts 10 are set on outer tube 5, so even after outer tube 5 hardens, outer tube 5 is not bent and keep smooth outer circumferential face.And outer effective conformal parts 10 are owing to the gap w that has guaranteed on tube axial direction
2So, have and can make plastic conduit 1 not lose the advantage that improves withstand voltage flat intensity flexibly.
Again, in the formation of above-mentioned plastic conduit 1, because effective conformal parts 10 outside only on the internal surface of outer tube 5, disposing, so can make synthetic resin keep original elasticity with regard to spiral reinforcing part 4, if remove the external force that acts on plastic conduit 1, the plastic conduit 1 that then can make section be deformed into elliptical shape reverts to circular section.
Synthetic resin as being used in above-mentioned interior pipe 2, spiral reinforcing part 4 and outer tube 5 has illustrated synthetic resin raw material such as polyethylene, PVC, polypropylene.The synthetic resin that is used in each several part is preferably same material from the viewpoint of cementability, but not only is defined in this, also can use different respectively synthetic resin raw material.In this case, if resin cementability each other is lower, improve cementability thereby then can form adhesive layer betwixt.
Do not limit as the material that forms above-mentioned adhesive layer is special, used adhesive resins such as to use high density polyethylene (HDPE) under the situation of polyethylene, PVC, polypropylene etc. at above-mentioned synthetic resin.
The variation of the prominent bar of a-1
Again, not limiting as the section shape of the prominent bar 3 in the spiral reinforcing part 4 is special, except square shown in Figure 2, can be rectangle or trapezoidal, perhaps also can be triangle as shown in Figure 4, and then also can be the semicircular section (not shown) that forms the circle ripple.In Fig. 4 by being that leg-of-mutton prominent bar 11 is wound into helical and constitutes helical reinforcing part 4 with section.
A-2 has the spiral reinforcing part of positioning part
Fig. 5 is provided with the situation that is used for outer effective conformal parts 10 are navigated to exactly the positioning part on the spiral reinforcing part 4.
Have end difference 12b, 12b on the prominent bar 12 of the spiral reinforcing part 4 shown in this figure each bight of outer circumferential side in the 12a of its peak portion than the low one-level in top of the 12a of peak portion.
Owing to have above-mentioned end difference 12b, a 12b, when going up, the 12a of peak portion of the prominent bar 12 of adjacency becomes its positioning part so can effective outside conformal parts 10 be set up in.Thus, can prevent effective conformal parts 10 outside the manufacture process middle external tube is reeled accurately with the skew of conformal parts 10.
In addition, above-mentioned end difference 12b, 12b also can be formed on on the outer circumferential side bight of the 12a of peak portion at least one.
Again, the shape of spiral reinforcing part 4 is not limited to square shown in Figure 5, and the bottom that also can be illustrated in figure 6 as prominent bar 13 forms lower hem and expands open trapezoidal.
The manufacture method of a-3 plastic conduit
At first, the synthetic resin of pipe 2 raw material extrudes and is configured as continuous band shape by extruding forming machine (not shown) in will becoming, and uses on the roller (not shown) supplying to shaping cylindraceous under the semi-molten state.
The synthetic resin of the band shape that extrudes is batched successively in the mode that the posterior lateral margin portion with the synthetic resin of the band shape of reeling earlier partially overlaps, thus make the superposed part welding form cylindraceous in pipe 2.
Then, use banded synthetic resin under the semi-molten state, to be shaped to process prominent bar 3, and in it is wound up on the trunk outer wall of pipe 2, make on the outer surface of pipe 2 in should prominent bar 3 being fused to of coiling.
Then, with the 3a of peak portion and the mode between the 3a of peak portion of the prominent bar 3 that is set up in adjacency the outer effective conformal parts 10 of band shape are reeled with the state that separates the gap, and then form outer tube 5 by the banded synthetic resin of reeling.
In addition, the method that forms outer tube 5 is not limited to the method for the synthetic resin of above-mentioned coiling band shape, also can make the sheet material of outer tube 5 usefulness in advance, the sheet material that obtains is wrapped on the 3a of peak portion of prominent bar 3.
And then, when formation outer tube 5,, then in cooling procedure, can cause thermal shrinkage if spiral reinforcing part 4 is higher with the temperature of the synthetic resin of band shape or sheet with the outer tube formation that is wound up on its outer surface, thus peeling off between generation and the outer effective conformal parts 10.
In this case,, make on its 3a of peak portion that bonds to prominent bar 3 establishing adhesive layer by folder after the cooling, then can prevent to peel off if form the band shape of outer tube 5 usefulness or the synthetic resin of sheet by the operation different with making spiral reinforcing part 4.
Again, make plastic conduit 1 back since the thermal shrinkage of tube axial direction make outside under effective conformal parts 10 situation about being bent upwards, need only and apply pressing force from the lateral tube hub of plastic conduit 1 and the outer surface of plastic conduit 1 can be corrected into smooth state.
Again, effective outside at first as shown in Figure 3 conformal parts 10 are embedded in the formation on the outer tube 5, effective conformal parts 10 are embedded in and form banded synthetic resin under the state on outer tube 5 inside outside making, and make its 3a of peak portion that bonds to spiral reinforcing part 4 upward be wound into helical, in this case, for and above-mentioned same reason also can be at the 3a of peak portion and outside being embedded with between the outer tube 5 of effective conformal parts 10 folder establish adhesive layer.
B only has the plastic conduit of the outer tube of band outer tube conformal parts at tube end
In the above-described embodiment illustration have plastic conduit 1 on the whole at pipe with the outer tube 5 of outer tube conformal parts 10 conformals, but because plastic conduit 1 of the present invention is when using joint connection plastic conduit each other, the comparable performance and do not need to carry out the pointing filling operation and good operability is arranged of intercepting water that in the past improved is so also can only be formed on the outer tube 24 with 10 conformals of outer tube conformal parts on the two end part of plastic conduit as shown in Figure 7.
On the 23a of peak portion of a plurality of prominent bar 22 on the end of plastic conduit 20, by forming outer tube 24 at the state last volume strip winding shape synthetic resin that links the 23a of peak portion.
This outer tube 24 is by outer effective conformal parts 10 (not shown) thereby makes the smooth conformal of its outer circumferential face.The outer tube 24 of conformal is arranged on the two ends of plastic conduit 20, specifically is arranged in the outer tube formation portion 25 of the scope of representing with " I " on right-hand end and the left end.
In addition, 26 is the prominent bar hollow portions that are formed in the prominent bar 22 in the outer tube formation portion 25, the 27th, with the 23b of paddy portion, outer tube 24, and in manage the 21 paddy side hollow portions that are divided into.
In addition, the two end part that are illustrated in plastic conduit 20 among Fig. 7 are provided with the formation of outer tube formation portion 25, be under the situation of composite pipe 20 of length of 1000mm at Production Example such as diameter, can separate certain intervals and form a plurality of outer tube formation 25 (for example 1m) of portion (for example 5m).In this case, if cut off along diametric(al) at the tube axial direction central part of any one outer tube formation portion 25, then the outer surface of this cutout portion works as level and smooth joining portion.
The joint construction of c plastic conduit
The joint of c-1 sleeve type
The formation that Fig. 8 represents to use 30 pairs of plastic conduits of joint of sleeve type to connect each other.The connection side end of a plastic conduit 1 is inserted among the connection mouth 30a of a side of plastic joint 30, the connection side end of another plastic conduit 1 not shown in the figures is inserted among the connection mouth 30b of opposite side of this joint 30.
Again, on the tube axial direction central part of joint 30, along the circumferential direction be formed with the slot part 30c of U word shape, the degree of depth of this slot part 30c forms with the thickness of left and right sides plastic conduit 1 (only showing left side plastic conduit 1 among Fig. 8) roughly the same, thus, make the internal surface of the internal surface of plastic conduit 1 and joint 30 on one side.Again, slot part 30c works as the positioning part under the situation of inserting plastic conduit 1, and the connection side end face to plastic conduit 1 under the situation that insertion is finished is sealed.
Fig. 9 is the enlarged view of the B portion of Fig. 8.
In the figure, the filler 31 that synthetic rubber is configured as tubular and forms is installed on the trunk outer wall of connection side end of outer tube 5, this filler 31 is formed with a plurality of serration 31a towards connecting direction, on connecting direction, plastic conduit 1 easily can be inserted, on opposite direction, play drag effect and prevent to become flexible.
In addition, plastic conduit 1 of the present invention is because the trunk outer wall of outer tube 5 is smooth, so there is not the such paddy portion 61 of corrugated tube 60 (with reference to Figure 19) in the past.
In bellows 60 in the past, needs height h's intercepts water with the sheet or the usefulness pointing 62 (with reference to Figure 19 (b)) that intercepts water for landfill paddy portion 61 guarantees intercepting water property, but plastic conduit 1 of the present invention does not need such intercept water with piece or intercept water and use pointing, only just can improve the adaptation between outer tube 5 and the joint 30 and obtain the stable effect that intercepts water with the thin filler 31 of wall.In addition, the telescopic joint of 63 expressions among Figure 19 (a).
Among Fig. 9, filler 31 is not limited to above-mentioned synthetic rubber, also can use synthetic rubber or the nonwovens hydroexpansivity sealing material as body material.And then filler 31 is owing to use the hydroexpansivity sealing material, and filler expands under the situation of water intrusion, thereby has improved the adaptation between plastic conduit 1 and the joint 30, therefore, also can improve the close property of liquid and make and extract the difficulty raising.
Figure 10 be with the direction of tubular axis PA (with reference to Fig. 8) quadrature on cut off being connected the side end face of plastic conduit 1 and sectional view.Pipe 2 appears on the concentric circle with outer tube 5 on the end face of plastic conduit 1, removes the slot part D that occurs ring-type outside the scope C between interior pipe 2 and outer tube 5.
In addition, scope C represents the section of prominent bar 3, and slot part D represents the 3b of paddy portion of 3 of prominent bars.This slot part D is the path that is communicated to the other end from an end helically of plastic conduit 1.Again, the mark E that represents in scope C is the path that is communicated to the other end in prominent bar 3 from an end helically of plastic conduit 1.
Because as the slot part D and the path E of connection in 3b of paddy portion and prominent bar 3 all form water channel, so seal with the key of as shown in figure 11 the usefulness that intercepts water.
C-2 intercepts water and uses key
Under the situation of packing material of using the solid length that forms by thermoplastic resin or heat-curing resin as above-mentioned key, the key that the key 32 of insertion slot part D uses the section shape of section shapes and the 3b of paddy portion as one man to be shaped, the key that key 33 uses of insertion path E and the hollow profile shape of prominent bar 3 as one man are shaped.
In addition, key can also insert when synthetic resin 1 is shaped in package, also can be inserted in another operation after synthetic resin 1 is shaped.
Again, use foaminess resins such as polyurethane foam foam as key, in this case, with plastic conduit 1 traverse, after using the foaminess resinous principle (material that has for example mixed 2 kinds of liquid such as polyatomic alcohol polybasic alcohol, isocyanates) of filling machine (not shown) before the part of slot part D and path E is injected foaming, thereby in slot part D and path E, make this composition foaming stop up the part of slot part D, path E.
In addition, the foaminess resin does not then have special the qualification so long as form the resin of separated foam, but (for example the core density of foam molding is 50kg/m with the intensity that can resist the regulation of hydraulic pressure in order to guarantee the close property of liquid preferably having good water resistence
3More than).
In addition, the resin of above-mentioned foaming can be used as then and uses with framed (resin is framed) of the foaminess resin that injects for intercepting water.Again, on the end face of plastic conduit 1, install framedly during foaming,, this glass cloth is immersed in the Foamex, improve intensity thereby the periostracum of Foamex can be made the FRP structure if dispose cancellous glass cloth in this framed internal surface one side.
Again, using inorganic filling material, specifically using under the situation of mortar as key, as if flowing in slot part D and the path E by the mortar that portland cement, sand, water cooperation obtain and making its curing, then because the intensity of on the intensity of plastic conduit 1 self, having added mortar, so the anti-flat intensity of plastic conduit 1 can further improve.
Above-mentioned mortar from the viewpoint of the tensile strength that improves mortar, also can add the polymer such as aid of cement.And then from making the light-weighted viewpoint of packing material, preferably that sintering quality is the low weight styrene resin fat granule or the material of perlite gained etc. use dispersing agent that it is distributed in the cement equably as aggregate.
In addition, the filling of above-mentioned key is to handle as intercepting water of tube end when making plastic conduit 1 and implement in factory.
D has the plastic conduit of the spiral reinforcing part of band stiffening element
In addition, below make same mark for the constituting component identical and omit its explanation in the explanation with Fig. 2.
In plastic conduit shown in Figure 12 40, the internal surface of spiral reinforcing part 4 is provided with stiffening element 41, and this stiffening element 41 is processed into sheet metal banded and further bends to convex shape and forms.Again, stiffening element 41 has in being wound up under the state on the trunk outer wall of pipe 2 to the outstanding protuberance 41a of peripheral direction, is formed with a pair of 41b of foot, 41b on the lower hem of this protuberance 41a.
Each 41b of foot warpage in the opposite direction mutually on tube axial direction, the length s of the 41b of foot are set at and can guarantee gap w between the 41b of foot of the prominent bar 3 of adjacency
1Length.
Thus, in prominent bar 3 is wound up into, manage on 2 the trunk outer wall after, by above-mentioned gap w
1Make 3b of paddy portion and 2 weldings of interior pipe.
For interior pipe 2, be to extrude continuously by not shown extrusion forming machine to be configured as banded resin, and supplying under the semi-molten state on the shaping usefulness roller cylindraceous (not shown).
Being shaped is made of a plurality of roller sheets that dispose under the state with respect to the inclination of tube axle with roller, the banded resin that extrudes is batched successively on each roller sheet of inclination, and overlapping also by the posterior lateral margin portion with the banded resin of reeling earlier, welding is configured as cylindric.
On the trunk outer wall of the interior pipe 2 that is shaped like this, reel and be used for further strengthening the stiffening element 41 of spiral reinforcing part 4, reeling on the outer surface of this stiffening element 41 is used to form the banded synthetic resin of prominent bar 3, thereby forms the spiral reinforcing part 4 of band stiffening element 4.
Then, with the mode of the 3a of peak portion that links the prominent bar 3 on the spiral reinforcing part 4 outer effective conformal parts 10 of reeling, the outside of the effective conformal parts 10 banded synthetic resin of reeling at this outside, thereby formation outer tube 5.
According to plastic conduit 40 with above-mentioned formation and since spiral reinforcing part 4 be by stiffening element 41 strengthen, outer tube 5 is by outer effective conformal parts 10 conformals, can further improve flat compressive strength so compare with plastic conduit 1 shown in Figure 2.
D-1 has the plastic conduit of the interior pipe of effective conformal parts in the band
Plastic conduit 42 as shown in figure 13 makes double-layer structural 2a, 2b with interior pipe 2, effective conformal parts 43 in burying underground betwixt.
Interior effective conformal parts 43 are made of the sheetmetal of band shape, and dispose with the 41b of foot that strides the stiffening element 41 that spiral reinforcing part 4 is strengthened, the mode of 41b.
Again, guarantee predetermined gap t each other at interior effective conformal parts 43, by this clearance t make double-deck in pipe 2a and 2b welding and integrated.
According to the plastic conduit 42 with above-mentioned formation, the outer surface of outer tube 5 is formed flatly, and the internal surface of interior pipe 2 also is formed flatly.Thus, can bear from inside and outside pressure, withstand voltage flat intensity also further improves.
The variation of the spiral reinforcing part of d-2 band stiffening element
Plastic conduit 44 as shown in figure 14, the prominent bar 45 of the spiral reinforcing part 4 that is provided with between interior pipe 2 and outer tube 5 bends to triangular shape.
During this constitutes, be provided with stiffening element 46 in internal surface one side of each prominent bar 45, this stiffening element 46 forms by sheet metal is processed into the section word of falling V shape, and the section shape conformal of prominent bar 45 is become triangular shape.Again, with mode effective conformal parts 10 outside internal surface one side of outer tube 5 is provided with of the 45a of peak portion that links prominent bar 45.
D-3 has the stiffening element of positioning part
Plastic conduit 47 shown in Figure 15, about the stiffening element 49 that the inboard at the prominent bar 48 that forms square wave is provided with, the both sides of surperficial 49a (tube axial direction) is formed with end difference (positioning part) 49b thereon.
These end differences 49b forms than the low one-level of upper surface 49a ground, makes the tube axial direction end of outer effective conformal parts 10 corresponding with each end difference 49b.Thus, when the mode with the 48a of peak portion that strides prominent bar 48 disposes outer effective conformal parts 10, can navigate to exactly on the assigned position (end difference 49b) of prominent bar 48 by outer effective conformal parts 10.Its result can make the smooth plastic conduit of outer surface 47 more accurately.
The prominent bar 51 of plastic conduit 50 shown in Figure 16 forms trapezoidal shape.
Be provided with in the inboard of prominent bar 51 and be processed into trapezoidal stiffening element 52, be formed with end difference 52b, 52b in the both sides of the upper surface 52a of this stiffening element 52.
Each end difference 52b forms the low one-level than upper surface 52a, and the end of the tube axial direction of effective conformal parts 10 is corresponding with these end differences 52b outside making.
In addition, above-mentioned Figure 15 and end difference 49b (52b) shown in Figure 16 preferably are formed on the both sides of the tube axial direction of prominent bar 48 (51) peripheral parts, but as long as can play the effect of location in a certain at least side formation.
The variation of d-4 stiffening element
In plastic conduit shown in Figure 17 53, the inboard of prominent bar 54 is strengthened by the stiffening element 55 that thin metallic plate forms, be formed with two 55a of stiffening element foot and the 55b that is flexed into the tube axial direction almost parallel in the bottom side of this stiffening element 55, and the length difference of each 55a of stiffening element foot, 55b.
In more detail, among the figure right side stiffening element 55a of foot form and the prominent bar 54 of adjacency between wide roughly 1/2 the length of paddy, the stiffening element 55b of foot in left side extends towards the prominent bar 54 of adjacency and is provided with and forms the length roughly the same with the coiling pitch of prominent bar 54.
Therefore, on the trunk outer wall of pipe 2 time, formerly the 55b of stiffening element foot of the prominent bar 54 of Juan Raoing went up the stacked next 55a of stiffening element foot of the prominent bar 54 of coiling in prominent bar 54 was wound up into.
Thus, even do not use the interior effective conformal parts 43 that form by miscellaneous part as shown in Figure 13, pipe 2 in also can when forming spiral reinforcing part 4, strengthening, thus improve their intensity and smooth interior surfaces.
In addition, between 55a of stiffening element foot and prominent bar 54 adjacent thereto, guaranteed gap w
3Thereby prominent bar 54 resin portion welding each other is also integrated.Again, owing to also guaranteed gap w at the front end of the 55b of stiffening element foot
4So, the welding and integrated each other of the resin portion between interior pipe 2 and the prominent bar 54.
According to the plastic conduit 53 with above-mentioned formation, the outer surface of outer tube 5 is formed flatly, and the internal surface of interior pipe 2 also is formed flatly.Again, so owing to can bear from the withstand voltage flat intensity of inside and outside pressure also further raising.
According to each plastic conduit with above-mentioned formation, because the outer surface of outer tube all is level and smooth, so split under the situation that joint connects each other to plastic conduit in use, if for example the butyl rubber sheet is wrapped on the involutory part of plastic conduit with the width of regulation and from it face install and split joint, then the gap can be do not formed splitting between joint and the outer tube, thereby the water tightness of pipe anastomosis part can be improved.
Specifically, form in the bellows of φ 600mm in the past of concavo-convex waveform at outer surface, even pointing is filled and the processing of having implemented to intercept water by trough portion, when being 0.02～0.05MPa left and right sides, interior pressure also can begin to leak, relative with it, configuration opposite each other of the plastic conduit of φ 600mm of the present invention and use are split joint and are connected, and press 0.35MPa just to leak in supporting to.
The filling operation that does not need to carry out pointing like this, can improve the performance that intercepts water, so and because can make the operation raising according to plastic conduit of the present invention.
In addition, the formation of above-mentioned Figure 12～Figure 17 also can only form on the connection side end of pipe by plastic conduit as shown in Figure 7 like that.
Claims (7)
1. plastic conduit, it is characterized in that having: interior pipe forms by banded synthetic resin is wound into helical;
Spiral reinforcing part, the synthetic resin material by will being shaped as prominent bar are wound up into as outside helically with the peak portion of this prominent bar and form on the trunk outer wall of pipe in above-mentioned;
Banded plastic outer tube is provided with about part or all of the above-mentioned prominent bar arranged along tube axial direction, links the peak portion of above-mentioned prominent bar along tube axial direction;
Outer effective conformal parts are embedded in the above-mentioned outer tube or are attached to above-mentioned outer pipe internal surface one side, and above-mentioned outer tube is carried out conformal and makes it smooth, are formed by band metal thin plate;
Should reel with the state that in the peak of above-mentioned prominent bar portion, separates predetermined distance by outer effective conformal parts, and be erected in the peak portion of above-mentioned prominent bar of adjacency, be formed with the weld portion of above-mentioned outer tube and above-mentioned spiral reinforcing part at interval by the afore mentioned rules of above-mentioned outer effective conformal parts.
2. plastic conduit as claimed in claim 1 is characterized in that, the above-mentioned outer tube by above-mentioned outer effective conformal parts conformal flatly only is arranged on the two end part of the interior pipe that is wound with above-mentioned spiral reinforcing part.
3. plastic conduit as claimed in claim 1 or 2 is characterized in that, sets up the stiffening element that is formed by thin metallic plate along above-mentioned prominent bar on above-mentioned spiral reinforcing part.
4. plastic conduit as claimed in claim 3 is characterized in that, in the peak of above-mentioned prominent bar portion, be formed be used for to reel above-mentioned outside the end difference that positions of the tube axial direction edge portion of effective conformal parts.
5. plastic conduit as claimed in claim 3 is characterized in that, with above-mentioned stiffening element accordingly, in above-mentioned, be embedded with in the pipe and pipe in above-mentioned is carried out conformal and make its smooth interior effective conformal parts that form by thin metallic plate.
6. plastic conduit as claimed in claim 5 is characterized in that, all within it sides of above-mentioned stiffening element have a pair of foot, and above-mentioned interior effective conformal parts dispose in the mode that links this a pair of foot along tube axial direction.
7. plastic conduit as claimed in claim 3, it is characterized in that, the all within it sides of above-mentioned stiffening element have a pair of foot, a warpage on tube axial direction in its foot, and the trunk outer wall along above-mentioned interior pipe extends the prominent bar that is set to adjacency, and pipe in above-mentioned is carried out conformal and makes it smooth.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510113858XA CN100567787C (en) | 2005-10-21 | 2005-10-21 | Plastic conduit |
| HK07108475.0A HK1100691A1 (en) | 2005-10-21 | 2007-08-03 | A synthetic resin tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510113858XA CN100567787C (en) | 2005-10-21 | 2005-10-21 | Plastic conduit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1952461A CN1952461A (en) | 2007-04-25 |
| CN100567787C true CN100567787C (en) | 2009-12-09 |
Family
ID=38058926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510113858XA Expired - Fee Related CN100567787C (en) | 2005-10-21 | 2005-10-21 | Plastic conduit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100567787C (en) |
| HK (1) | HK1100691A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876384A (en) * | 2010-03-05 | 2010-11-03 | 沙洲职业工学院 | Steel-band reinforced steel plastic composite wound pipe |
| CN102853177A (en) * | 2011-06-29 | 2013-01-02 | 努里技术有限公司 | Synthetic resin pipe and manufacturing method thereof |
| CN104836011B (en) * | 2015-05-28 | 2018-01-02 | 四川九洲空管科技有限责任公司 | spaceborne helical antenna |
| JP7010730B2 (en) * | 2018-03-02 | 2022-02-10 | 株式会社神戸製鋼所 | Structure manufacturing method and structure |
| CN110498970A (en) * | 2019-09-04 | 2019-11-26 | 安徽上造智能设备科技有限公司 | A kind of high-strength ageing power cable protection sleeve |
-
2005
- 2005-10-21 CN CNB200510113858XA patent/CN100567787C/en not_active Expired - Fee Related
-
2007
- 2007-08-03 HK HK07108475.0A patent/HK1100691A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CN1952461A (en) | 2007-04-25 |
| HK1100691A1 (en) | 2007-09-28 |
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