CN104565565B

CN104565565B - A kind of band spiral fluted construction drainage plastic standing tube

Info

Publication number: CN104565565B
Application number: CN201410848632.3A
Authority: CN
Inventors: 颜建萍; 吴克建; 林辉
Original assignee: SHANGHAI SHENHAI HONGTIAN BUILDING MATERIAL CO Ltd
Current assignee: SHANGHAI SHENHAI HONGTIAN BUILDING MATERIAL CO Ltd
Priority date: 2014-12-30
Filing date: 2014-12-30
Publication date: 2016-06-15
Anticipated expiration: 2034-12-30
Also published as: CN104565565A

Abstract

The invention discloses a kind of band spiral fluted construction drainage plastic standing tube, including plastic standing tube body, coaxially being circumferentially provided with some helicla flutes in plastic standing tube inner body wall along standpipe axis direction, spiral fluted bottom land is arc transition structure with the junction of cell wall and the junction of spiral fluted notch and plastic standing tube inner body wall. Spiral fluted bottom land is arc transition structure with the junction of cell wall and the junction of spiral fluted notch and plastic standing tube inner body wall, the helicla flute making the present invention is the little streamlined arcuate structure that namely radius of curvature is big of curvature, theory according to fluid wall attachment effect, avoid current direction standpipe centralized movement and produce the situation of water plug flow, reduce the fluctuation of overpressure, improve the drain discharge in certain pressure fluctuation range, also avoid current alternately impacting tube wall, make pipe vibration and draining noise be substantially reduced.

Description

A kind of band spiral fluted construction drainage plastic standing tube

Technical field

The present invention relates to construction drainage pipe field, particularly to a kind of band spiral fluted construction drainage plastic standing tube having and preventing the advantages such as floor drain deodorant, reduction current noise, drainability are strong.

Background technology

Plastic tube is the tubing that a kind of construction drainage is conventional, but due to plastic pipe inner wall smooth, frictional resistance is little, during for construction drainage standpipe, water velocity is higher, when flow is slightly larger, it is easy to form water plug flow (water plug flow: when referring to construction drainage standpipe for gravity drainage, when flow is excessive, to be attached to the water film thickness of tube wall excessive or be subject to the current that affect of structure and form central authorities' water body and falls in pipeline, forms group's plug-like current of whereabouts in pipeline. Under this streamflow regime, current are little by pipe friction drag effects, and lower speed drops soon, formed under gravity and accelerate flowing. Acutely, current noise is big, it is easy to cause toilet floor drain damage of water block, back foul phenomenon occurs in build-up of pressure fluctuation. ), cause and bigger pressure oscillation and toilet back foul occur in pipe. This disadvantage limits the raising of plastic pipe drainability. In order to solve this problem, nearly more than ten years, a kind of novel internal coiling plastic drain pipe was developed, and by wide popularization and application.

Referring to shown in Fig. 1 to Fig. 3, the architectural feature of current internal coiling plastic drain pipe 10 is to have the triangle spiral ribbed steel wire 12 of several constant pitch certain altitudes at pipe material inner wall 11, and the junction 13 of the root of triangle spiral ribbed steel wire 12 and pipe material inner wall 11 is without arc transition. The purpose of triangle spiral ribbed steel wire 12 is to make the current fallen along tube wall form spiral type attached wall current (the attached wall current of spiral type: when referring to construction drainage standpipe for gravity drainage, current are attached to inner-walls of duct and fall twist, form the membranaceous current of spiral type fallen along inner-walls of duct. Under this streamflow regime, current reduce in the falls downward speed of pipe friction resistance and rotary centrifugal force, are formed and at the uniform velocity flow, and water film thickness increases. Be conducive to improving pipe drainage performance, reduce pressure oscillation, it is prevented that toilet floor drain back foul, reduce current noise, improve drainability.), reduce current falling speed, increase pipe friction resistance, to reduce pressure oscillation during standpipe draining, it is prevented that floor drain damage of water block, reduce the generation of toilet back foul phenomenon. When drain discharge is less, overpressure fluctuation and current falling speed substantially reduce. Internal coiling plastic drain pipe 10 drainability also relatively light wall plastic tube increase.

But when the test of actually used and drainability, when displacement increases, the bigger pressure oscillation of generation and vibration noise in internal coiling plastic drain pipe 10. Shown in Fig. 4, its reason is in that: 1) be subject to gravity and the impact of pipe friction resistance, and the current 1 along tube wall whereabouts are crossed triangle spiral ribbed steel wire 12 and flowed along tube wall, it is impossible to form spiral water flow along triangle spiral ribbed steel wire 12; 2) when current 1 fall to flowing through triangle spiral ribbed steel wire 12 surface along tube wall, due to triangle spiral ribbed steel wire 12 surface curvature greatly (radius of curvature is minimum), according to fluid wall attachment effect, (wall attachment effect: refer to that fluid (current or air-flow) has and leave original flow direction changes into along with the tendency of the body surface flowing protruded. When there is mantle friction between fluid and its body surface of flowing through, the flow velocity of fluid can slow down. As long as the curvature of body surface is not too big, according to the Bernoulli's theorem in hydrodynamics, slowing down of flow velocity can cause that fluid is attracted on body surface and flows. ) theory, current 1 have and leave curvature greatly towards the strong tendency of standpipe central motion, and displacement is more big, and current 1 are more big to the water yield of standpipe central motion. Causing current 1 big ups and downs in pipe, formed and alternately impact the water plug flow that tube wall falls, block gas channel in pipe, build-up of pressure fluctuation sharply raises, and noise increases, thus damage of water block occurs, and the generation of toilet back foul phenomenon.

Summary of the invention

Present invention aims to existing internal coiling plastic drain pipe pressure oscillation easily occur when displacement increases, not enough and defect of destroying water seal, floor drain back foul, noise increase etc., it is provided that a kind of reach to change falling water flow form in soil stack, overpressure fluctuation when reducing draining, reduce falling water flow speed, avoid damage of water block and toilet back foul, reduce draining noise, improve the band spiral fluted construction drainage plastic standing tube of the purposes such as drainability.

Technical problem solved by the invention can realize by the following technical solutions:

A kind of band spiral fluted construction drainage plastic standing tube, including plastic standing tube body, it is characterized in that, coaxially being circumferentially provided with some helicla flutes in described plastic standing tube inner body wall along standpipe axis direction, described spiral fluted bottom land is arc transition structure with the junction of cell wall and the junction of described spiral fluted notch and described plastic standing tube inner body wall.

In a preferred embodiment of the invention, described spiral fluted bottom land is indent arcwall face.

In a preferred embodiment of the invention, described spiral fluted groove depth is 1.5～2mm, and groove width is 8～10mm, the radius of corner 2～5mm of described arc transition structure.

In a preferred embodiment of the invention, described some helicla flutes divide distribution along tube section circumferencial direction etc.

In a preferred embodiment of the invention, described helicla flute is 6～12, and adjacent two spiral fluted pitch are 500～760mm.

In a preferred embodiment of the invention, described plastic standing tube body and some helicla flutes adopt plastic material thermoplastic extrusion one-body molded.

In a preferred embodiment of the invention, described plastic material is polyethylene or polypropylene or polrvinyl chloride.

In a preferred embodiment of the invention, the described spiral fluted hand of spiral is seen as from top to bottom along axis counterclockwise.

Owing to have employed technical scheme as above, the beneficial effects of the present invention is: spiral fluted bottom land is arc transition structure with the junction of cell wall and the junction of spiral fluted notch and plastic standing tube inner body wall, the helicla flute making the present invention is the little streamlined arcuate structure that namely radius of curvature is big of curvature, theory according to fluid wall attachment effect, when in-pipe flow falls along tube wall, current are attracted to tube wall and will not leave, form good attached wall water film flow pattern, avoid current direction standpipe centralized movement and produce the situation of water plug flow, reduce the fluctuation of overpressure, improve the drain discharge in certain pressure fluctuation range, also avoid current alternately impacting tube wall, pipe vibration and draining noise is made to be substantially reduced. furthermore, adsorbed current are subject to the effect of pipe friction resistance, and falling speed is substantially reduced, it is to avoid destroy water seal, it is prevented that floor drain back foul. owing to falling water flow is attracted to tube wall, adding the effect to current of the pipe friction resistance, the current descent path of helical curve wire extends the water movement length of unit height of drop simultaneously, makes current falling speed reduce further.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the surface structure schematic diagram of the internal coiling plastic drain pipe of currently available technology.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the B-B sectional view of Fig. 1.

Current flow regime schematic diagram in the internal coiling plastic drain pipe pipe of prior art when Fig. 4 is displacement increase.

Fig. 5 is the surface structure schematic diagram of an embodiment of the present invention.

Fig. 6 is the A-A sectional view of Fig. 5.

Fig. 7 is the B-B sectional view of Fig. 5.

Fig. 8 is the perspective view of an embodiment of the present invention.

Current flow regime schematic diagram in an embodiment of the present invention pipe when Fig. 9 is displacement increase.

Detailed description of the invention

For the technological means making the present invention realize, creation characteristic, reach purpose and effect and be easy to understand, the present invention is further elucidated below.

Referring to a kind of band spiral fluted construction drainage plastic standing tube shown in Fig. 5 to Fig. 8, including plastic standing tube body 100, coaxially it is circumferentially provided with some helicla flutes 120 at plastic standing tube body 100 inwall 110 along standpipe axis direction.

In the present embodiment, helicla flute 120 is 12, along point distributions such as tube section circumferencial directions. The bottom land 121 of helicla flute 120 is arc transition structure with the junction 121a of cell wall and the notch of helicla flute 120 with the junction 122 of plastic standing tube inner body wall 110. In the present embodiment, the bottom land 121 of helicla flute 120 is indent arcwall face so that helicla flute 120 curvature is greatly reduced, and namely radius of curvature increases.

In the present embodiment, the groove depth of helicla flute 120 is 1.5～2mm, and groove width is 8～10mm, two junction, place 121a, 122 the radius of corner 2～5mm of arc transition structure, the pitch of adjacent two helicla flutes 120 is 500～760mm.So the plastic standing tube inner body wall 110 of the present embodiment and helicla flute 120 and both junctions are the little streamlined arcuate structure that namely radius of curvature is big of curvature, improve the attached wall effect of current to greatest extent.

According to the theory according to fluid wall attachment effect, shown in Fig. 9, when in-pipe flow 1a falls along tube wall, current 1a is attracted to plastic standing tube inner body wall 110 and will not leave, form good attached wall water film flow pattern, it is to avoid current 1a produces the situation of water plug flow to standpipe centralized movement, reduce the fluctuation of overpressure, improve the drain discharge in certain pressure fluctuation range, it is thus also avoided that current alternately impacting tube wall, make pipe vibration and draining noise be substantially reduced. Furthermore, adsorbed current 1a is subject to the effect of pipe friction resistance, and falling speed is substantially reduced, it is to avoid destroy water seal, it is prevented that floor drain back foul. Owing to falling water flow is attracted to plastic standing tube inner body wall 110, adding the effect to current of the pipe friction resistance, the current descent path of helical curve wire extends the water movement length of unit height of drop simultaneously, makes current falling speed reduce further.

Due to earth autobiography direction, the hand of spiral of helicla flute 120 can be determined according to specified place, for instance when place to use is positioned at the Northern Hemisphere, and the hand of spiral of helicla flute 120 is seen as counterclockwise from top to bottom along axis, to improve water flow rotary effect.

The plastic standing tube body 100 of the present invention and some helicla flutes 120 adopt plastic material thermoplastic extrusion one-body molded, and plastic material is polyethylene or polypropylene or polrvinyl chloride, and the present invention facilitates fabrication and processing.

The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described. Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; described in above-described embodiment and description is that principles of the invention is described; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within the claimed scope of the invention. Claimed scope is defined by appending claims and equivalent thereof.

Claims

1. a band spiral fluted construction drainage plastic standing tube, including plastic standing tube body, it is characterized in that, coaxially being circumferentially provided with some helicla flutes in described plastic standing tube inner body wall along standpipe axis direction, described spiral fluted bottom land is arc transition structure with the junction of cell wall and the junction of described spiral fluted notch and described plastic standing tube inner body wall.

2. a kind of band spiral fluted construction drainage plastic standing tube as claimed in claim 1, it is characterised in that described spiral fluted bottom land is indent arcwall face.

3. a kind of band spiral fluted construction drainage plastic standing tube as claimed in claim 2, it is characterised in that described spiral fluted groove depth is 1.5～2mm, and groove width is 8～10mm, the radius of corner 2～5mm of described arc transition structure.

4. a kind of band spiral fluted construction drainage plastic standing tube as claimed in claim 3, it is characterised in that described some helicla flutes divide distribution along tube section circumferencial direction etc.

5. a kind of band spiral fluted construction drainage plastic standing tube as claimed in claim 3, it is characterised in that described helicla flute is 6～12, and adjacent two spiral fluted pitch are 500～760mm.

6. a kind of band spiral fluted construction drainage plastic standing tube as claimed in claim 3, it is characterised in that described plastic standing tube body and some helicla flutes adopt plastic material thermoplastic extrusion one-body molded.

7. a kind of band spiral fluted construction drainage plastic standing tube as described in claim 1 to 6 any claim, it is characterised in that described plastic material is polyethylene or polypropylene or polrvinyl chloride.

8. a kind of band spiral fluted construction drainage plastic standing tube as claimed in claim 7, it is characterised in that the described spiral fluted hand of spiral is seen as from top to bottom along axis counterclockwise.