CN205077562U - With layer drainage swirling flow five -way pipe fitting - Google Patents

With layer drainage swirling flow five -way pipe fitting Download PDF

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Publication number
CN205077562U
CN205077562U CN201520824492.6U CN201520824492U CN205077562U CN 205077562 U CN205077562 U CN 205077562U CN 201520824492 U CN201520824492 U CN 201520824492U CN 205077562 U CN205077562 U CN 205077562U
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main pipe
swirling flow
pipe
branch
longitudinal
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王帮进
董大洋
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MA'ANSHAN GUDI PLASTIC CEMENT CO Ltd
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MA'ANSHAN GUDI PLASTIC CEMENT CO Ltd
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Abstract

The utility model discloses a with layer drainage swirling flow five -way pipe fitting belongs to drainage pipe part field. The utility model discloses a trunk pipe, horizontal first branch pipe, horizontal second branch pipe and vertical collateral branch pipe, the vertical cross -section of vertical collateral branch pipe is oval, and the oval -shaped major axis compares for (5~4) with the length of minor axis: 3, preferably, the major axis compares for 4 with the length of minor axis: 3. The utility model discloses a five -way pipe fitting is applicable to the layer drainage together between the residential sanitation, need not to establish the vent stack, has saved breather pipe and pipe fitting, accords with the energy saving and consumption reduction environmental protection requirement that the country provided, in carrying out the work progress with layer drainage system, can reduce the construction layer height, effectively improves the space utilization of bathroom, reduces construction cost.

Description

A kind of co-layer draining swirling flow five-way tubing
Technical field
The utility model belongs to drainage pipe field of components, more particularly, relates to a kind of co-layer draining swirling flow five-way tubing.
Background technology
When multistory building constructions such as buildings, need the pipelines such as water supply, draining, blowdown are installed.Same floor wastewater discharge technique is for the interlayer water discharge technology traditional relative to China, be characterized in fixture drain not passing through floors in washroom, dewatering horizontal tube is connected with soil stack in this layer cover, only has soil stack passing through floors, once there is the situation needing cleaning dredging, the maintenance of pipeline and maintenance just can solve in this layer cover, do not need lower one deck to dredge unimpeded.There are three kinds of drainage method of the same layers at present: cushion type co-layer draining, with falling board-like co-layer draining and Gu co-layer draining.Cushion type co-layer draining refers to the Sand-gravel-cushion Technioue of padded accomodation ground, it is few that this mode adopts, because be easy generation " interior water is excessive ", adopt once in a while under unavoidable situation is chosen in old housing reform, new engineering due to its difficulty of construction large, expense of taking a lot of work material, affects attractive in appearance, increase the bearing load of building body, do not employ now.Falling board-like co-layer draining specific practice is that structure floor sinking (locally) 300mm of washroom is as pipeline laying space, sinking floor adopts Cast-in-place concrete and carries out waterproofing course, lay to, drainage pipe by design elevation and the gradient along sinking floor, and tamp as bed course with light materials such as cement cinders, bed course does waterproofing course and aspect again with after cement mortar screeding.Turning round and look at ground co-layer draining is the draining of a kind of " piping shaft " body of wall interior conduit, refer to that a stifled false wall is built at bathroom ware rear, the private space of the layout pipeline of the width that stroke is certain, branch drain not passing through floors lays within the walls in vacation, installs, and is connected in same floor with main pipeline.
Five-way pipeline is widely used in various construction drainage exhaust pipe system, mainly plays a part piping hinge, and confluxing for multiple-way duct discharge provides interface.Material mainly metal, pottery, plastics or the composite material of current five-way conduit component, wherein the application of plastics five-way conduit component is maximum.Plastics five-way pipeline part quality is light, and corrosion resistance is strong, not easily blocks, easy for installation, with low cost.Chinese Patent Application No. is 201320168646.1, and authorized announcement date is that the patent application document on September 11st, 2013 discloses a kind of swirling flow five-way pipeline, comprises main pipe, laterally left side arm, laterally right side arm and longitudinal side branch.Main pipe comprises main pipe entrance, main pipe connecting leg section, main pipe rectification section and main pipe outlet section, and main pipe rectification section comprises cone barrel housing and more than 3 equidistant arrangement and is arranged on swirling flow bent plate in cone barrel inner walls.Laterally left side arm comprises laterally left side manifold inlet section and laterally left side arm linkage section, laterally arm linkage section pipeline axis, left side and main pipe connecting leg segment pipe inner surface contour tangent.Laterally right side arm comprises laterally right side manifold inlet section and laterally right side arm linkage section, laterally arm linkage section pipeline axis, right side and main pipe connecting leg segment pipe inner surface contour tangent.Longitudinal side branch is communicated with main pipe connecting leg section.Chinese Patent Application No. is 201320580679.7, and authorized announcement date is that the patent application document on March 12nd, 2014 discloses a kind of five-way polypropylene silencing sewerage system list standpipe special pipe fitting, for drainage pipe.Comprise main body pipe fitting, the top of described main body pipe fitting is provided with the upper access flap of integration mutually with it, the sidewall of described main body pipe fitting is provided with it integration mutually and the left horizontal arm communicated, the side of described left horizontal arm is provided with the right horizontal arm and side branch that are connected with main body pipe fitting, described right horizontal arm and left horizontal arm are that horizontal symmetrical distributes, be provided with in described main body pipe fitting and be attached thereto logical spiral duct, the bottom of described main body pipe fitting is provided with to connect with spiral duct and fixes and the conveyor screw communicated.Swirling flow five-way tubing disclosed in above-mentioned patent, its side branch is all cylindrical shapes, no matter be falling in board-like co-layer draining or Gu ground co-layer draining work progress, construction layer height is all larger, usually the structure floor sinking preserved pipeline of washroom is needed to lay space, make troubles to work progress, add construction cost simultaneously.
Summary of the invention
The problem that 1, will solve
Have that construction layer thickness is large for existing swirling flow five-way tubing, construction inconvenience and the problem such as construction cost is high, the utility model provides a kind of co-layer draining swirling flow five-way tubing, comprise main pipe, laterally the first arm, laterally the second arm and longitudinal side branch, the vertical section of longitudinal side branch is oval, oval major axis is (5 ~ 4) with the length ratio of minor axis: 3, preferably, major axis is 4:3 with the length ratio of minor axis, five-way tubing of the present utility model can reduce construction layer height, the space availability ratio of effective raising washroom, reduces construction cost.
2, technical scheme
For solving the problem, the utility model adopts following technical scheme.
A kind of co-layer draining swirling flow five-way tubing, comprise main pipe, laterally the first arm, laterally the second arm and longitudinal side branch, main pipe comprises main pipe entrance, main pipe linkage section, main pipe Connectivity Section and main pipe outlet section, main pipe entrance, main pipe linkage section, main pipe Connectivity Section and main pipe outlet section integrated molding form main pipe, laterally the first arm is positioned at relative both sides, main pipe Connectivity Section with horizontal second arm, is communicated with respectively with main pipe Connectivity Section; Longitudinal side branch is communicated with main pipe Connectivity Section, longitudinal side branch pipeline axis and main pipe Connectivity Section inner-walls of duct profile tangent, the vertical section of described longitudinal side branch is oval, and oval major axis is (5 ~ 4) with the length ratio of minor axis: 3.
Preferably, the major axis of described ellipse and the length of minor axis are than being 4:3.
Preferably, described longitudinal side branch comprises longitudinal side branch linkage section and longitudinal side branch entrance, and the angle α of longitudinal side branch linkage section pipeline left surface and main pipe pipeline axis is 60 ~ 75 °.
Preferably, described longitudinal side branch entrance pipeline axis is vertical with main pipe pipeline axis.
Preferably, described longitudinal side branch entrance pipeline axis is with laterally first pipeline axis is vertical.
Preferably, be connected shaping by the transition of cone barrel pipeline between main pipe linkage section with main pipe Connectivity Section.
Preferably, described main pipe outlet section was connected with body of wall, crossed body of wall and comprised the body of wall port of export and crossed body of wall arrival end, cross body of wall arrival end and be nested in main pipe outlet section.
Preferably, described crossing in body of wall is provided with cone barrel swirling flow pipe, cone barrel swirling flow pipe is cone barrel shape, comprise swirling flow pipe osculum end and swirling flow pipe big opening end, the internal diameter of swirling flow pipe big opening end pipe diameter and main pipe outlet section pipeline is suitable, and swirling flow pipe osculum end pipe diameter is suitable with the internal diameter crossing body of wall port of export pipeline.
Preferably, the inner-walls of duct of described cone barrel swirling flow pipe is provided with swirling flow baffle plate, and the tangent line of swirling flow baffle plate guide curve surface and the angle of vertical plane are 20 ~ 40 °.
3, beneficial effect
Compared to prior art, the beneficial effects of the utility model are:
(1) swirling flow five-way tubing of the present utility model is applicable to the co-layer draining of residence toilet, without the need to setting up vent stack, eliminates ventilating pipe and pipe fitting, meets the energy-saving and cost-reducing environmental requirement that country proposes;
(2) vertical section of longitudinal side branch of swirling flow five-way tubing of the present utility model is oval, can reduce construction layer thickness in the work progress carrying out Homofloor drainage system, saves construction cost;
(3) the main pipe outlet section of swirling flow five-way tubing of the present utility model was connected with body of wall, cross in body of wall and be provided with cone barrel swirling flow pipe, the inner-walls of duct of cone barrel swirling flow pipe is provided with swirling flow baffle plate, the tangent line of swirling flow baffle plate guide curve surface and the angle of vertical plane are 20 ~ 40 °, angle the best is 23 °, the attached wall swirling flow of a water inlet tube and main pipe runoff from upslope formation rule can be made, avoid water and water, water and air, collision between water and tube wall, attached wall swirling flow simultaneously can make draining gravity be converted into centrifugal force, cut down the impact to pipeline, reduce the vibrations seeing pipeline, the noise of drainage system significantly reduces, realize quiet draining,
(4) vertical section of longitudinal side branch of swirling flow five-way tubing of the present utility model is oval, oval major axis is (5 ~ 4) with the length ratio of minor axis: 3, optimum length is than being 4:3, the bearing capacity of the longitudinal side branch under this ratio condition is the strongest, not easily by pressure break, long service life.
Accompanying drawing explanation
Fig. 1 is front view of the present utility model;
Fig. 2 is top view of the present utility model;
Fig. 3 is perspective view of the present utility model;
Fig. 4 was the structural representation of body of wall;
Fig. 5 is the structural representation of cone barrel swirling flow pipe;
Fig. 6 is the upward view of cone barrel swirling flow pipe.
In figure: 1, main pipe; 2, horizontal first arm; 3, horizontal second arm; 4, longitudinal side branch; 5, body of wall is crossed; 6, cone barrel swirling flow pipe; 101, main pipe entrance; 102, main pipe linkage section; 103, main pipe Connectivity Section; 104, main pipe outlet section; 401, longitudinal side branch linkage section; 402, longitudinal side branch entrance; 501, the body of wall port of export is crossed; 502, body of wall arrival end is crossed; 601, swirling flow pipe osculum end; 602, swirling flow pipe big opening end; 603, swirling flow baffle plate.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in detail.
Below in conjunction with specific embodiment, the utility model is described further.
Embodiment 1
As shown in Fig. 1 ~ Fig. 6, a kind of co-layer draining swirling flow five-way tubing, comprise main pipe 1, laterally the first arm 2, laterally the second arm 3 and longitudinal side branch 4, main pipe 1 comprises main pipe entrance 101, main pipe linkage section 102, main pipe Connectivity Section 103 and main pipe outlet section 104, main pipe entrance 101, main pipe linkage section 102, main pipe Connectivity Section 103 and main pipe outlet section 104 integrated molding form main pipe 1, be connected shaping by the transition of cone barrel pipeline between main pipe linkage section 102 with main pipe Connectivity Section 103, the pipe end outer rim of main pipe entrance 101 and main pipe outlet section 104 is also provided with a circle annulus projection, facilitate being fixedly connected with in installation process, laterally the first arm 2 is positioned at relative both sides, main pipe Connectivity Section 103 with horizontal second arm 3, is communicated with respectively with main pipe Connectivity Section 103, longitudinal side branch 4 is communicated with main pipe Connectivity Section 103, longitudinal side branch 4 comprises longitudinal side branch linkage section 401 and longitudinal side branch entrance 402, the angle α of longitudinal side branch linkage section 401 pipeline left surface and main pipe 1 pipeline axis is 60 °, longitudinal side branch entrance 402 pipeline axis and main pipe Connectivity Section 103 inner-walls of duct profile tangent, longitudinal side branch entrance 402 pipeline axis is vertical with main pipe 1 pipeline axis, and with laterally the first arm 2 pipeline axis is vertical, the vertical section of described longitudinal side branch 4 is oval, oval major axis is 4:3 with the length ratio of minor axis.
As a complete co-layer draining swirling flow five-way, main pipe outlet section 104 also with cross body of wall 5 and be connected, cross body of wall 5 and comprised the body of wall port of export 501 and crossed body of wall arrival end 502, cross body of wall arrival end 502 and be nested in main pipe outlet section 104; Cross in body of wall 5 and be provided with cone barrel swirling flow pipe 6, cone barrel swirling flow pipe 6 is cone barrel shape, comprise swirling flow pipe osculum end 601 and swirling flow pipe big opening end 602, the inner-walls of duct of cone barrel swirling flow pipe 6 is provided with swirling flow baffle plate 603, and the tangent line of swirling flow baffle plate 603 guide curve surface and the angle of vertical plane are 23 °.In addition, the internal diameter of swirling flow pipe big opening end 602 pipe diameter and main pipe outlet section 104 pipeline is suitable, swirling flow pipe osculum end 601 pipe diameter is suitable with the internal diameter crossing the body of wall port of export 501 pipeline, embed in main pipe outlet section 104 installing and using swirling flow pipe big opening end 602 in process, swirling flow pipe osculum end 601 withstood on the boss place of the body of wall port of export 501, therefore, cone barrel swirling flow pipe 6 was just in time stuck between body of wall 5 and main pipe 1.
Swirling flow five-way tubing in the present embodiment is easy for installation, be applicable to the co-layer draining of high residential building washroom, realize quiet draining, the vertical section of the longitudinal side branch on five-way tubing is oval, construction layer thickness can be reduced to original about 3/4, save construction cost in the work progress carrying out Homofloor drainage system, improve the space availability ratio of washroom, and the bearing capacity of longitudinal side branch is the strongest, not easily by pressure break, long service life.
Embodiment 2
As shown in Fig. 1 ~ Fig. 6, a kind of co-layer draining swirling flow five-way tubing, comprise main pipe 1, laterally the first arm 2, laterally the second arm 3 and longitudinal side branch 4, main pipe 1 comprises main pipe entrance 101, main pipe linkage section 102, main pipe Connectivity Section 103 and main pipe outlet section 104, main pipe entrance 101, main pipe linkage section 102, main pipe Connectivity Section 103 and main pipe outlet section 104 integrated molding form main pipe 1, be connected shaping by the transition of cone barrel pipeline between main pipe linkage section 102 with main pipe Connectivity Section 103, the pipe end outer rim of main pipe entrance 101 and main pipe outlet section 104 is also provided with a circle annulus projection, facilitate being fixedly connected with in installation process, laterally the first arm 2 is positioned at relative both sides, main pipe Connectivity Section 103 with horizontal second arm 3, is communicated with respectively with main pipe Connectivity Section 103, longitudinal side branch 4 is communicated with main pipe Connectivity Section 103, longitudinal side branch 4 comprises longitudinal side branch linkage section 401 and longitudinal side branch entrance 402, the angle α of longitudinal side branch linkage section 401 pipeline left surface and main pipe 1 pipeline axis is 75 °, longitudinal side branch entrance 402 pipeline axis and main pipe Connectivity Section 103 inner-walls of duct profile tangent, longitudinal side branch entrance 402 pipeline axis is vertical with main pipe 1 pipeline axis, and with laterally the first arm 2 pipeline axis is vertical, the vertical section of described longitudinal side branch 4 is oval, oval major axis is 5:3 with the length ratio of minor axis.
As a complete co-layer draining swirling flow five-way, main pipe outlet section 104 also with cross body of wall 5 and be connected, cross body of wall 5 and comprised the body of wall port of export 501 and crossed body of wall arrival end 502, cross body of wall arrival end 502 and be nested in main pipe outlet section 104; Cross in body of wall 5 and be provided with cone barrel swirling flow pipe 6, cone barrel swirling flow pipe 6 is cone barrel shape, comprise swirling flow pipe osculum end 601 and swirling flow pipe big opening end 602, the inner-walls of duct of cone barrel swirling flow pipe 6 is provided with swirling flow baffle plate 603, and the tangent line of swirling flow baffle plate 603 guide curve surface and the angle of vertical plane are 40 °.In addition, the internal diameter of swirling flow pipe big opening end 602 pipe diameter and main pipe outlet section 104 pipeline is suitable, swirling flow pipe osculum end 601 pipe diameter is suitable with the internal diameter crossing the body of wall port of export 501 pipeline, embed in main pipe outlet section 104 installing and using swirling flow pipe big opening end 602 in process, swirling flow pipe osculum end 601 withstood on the boss place of the body of wall port of export 501, therefore, cone barrel swirling flow pipe 6 was just in time stuck between body of wall 5 and main pipe 1.
Swirling flow five-way tubing in the present embodiment is easy for installation, be applicable to the co-layer draining of high residential building washroom, realize quiet draining, the vertical section of the longitudinal side branch on five-way tubing is oval, construction layer thickness can be reduced to original about 3/5, save construction cost in the work progress carrying out Homofloor drainage system, improve the space availability ratio of washroom, and the bearing capacity of longitudinal side branch is the strongest, not easily by pressure break, long service life.
Embodiment 3
As shown in Fig. 1 ~ Fig. 6, a kind of co-layer draining swirling flow five-way tubing, comprise main pipe 1, laterally the first arm 2, laterally the second arm 3 and longitudinal side branch 4, main pipe 1 comprises main pipe entrance 101, main pipe linkage section 102, main pipe Connectivity Section 103 and main pipe outlet section 104, main pipe entrance 101, main pipe linkage section 102, main pipe Connectivity Section 103 and main pipe outlet section 104 integrated molding form main pipe 1, be connected shaping by the transition of cone barrel pipeline between main pipe linkage section 102 with main pipe Connectivity Section 103, the pipe end outer rim of main pipe entrance 101 and main pipe outlet section 104 is also provided with a circle annulus projection, facilitate being fixedly connected with in installation process, laterally the first arm 2 is positioned at relative both sides, main pipe Connectivity Section 103 with horizontal second arm 3, is communicated with respectively with main pipe Connectivity Section 103, longitudinal side branch 4 is communicated with main pipe Connectivity Section 103, longitudinal side branch 4 comprises longitudinal side branch linkage section 401 and longitudinal side branch entrance 402, the angle α of longitudinal side branch linkage section 401 pipeline left surface and main pipe 1 pipeline axis is 67 °, longitudinal side branch entrance 402 pipeline axis and main pipe Connectivity Section 103 inner-walls of duct profile tangent, longitudinal side branch entrance 402 pipeline axis is vertical with main pipe 1 pipeline axis, and with laterally the first arm 2 pipeline axis is vertical, the vertical section of described longitudinal side branch 4 is oval, oval major axis is 4:3 with the length ratio of minor axis.
As a complete co-layer draining swirling flow five-way, main pipe outlet section 104 also with cross body of wall 5 and be connected, cross body of wall 5 and comprised the body of wall port of export 501 and crossed body of wall arrival end 502, cross body of wall arrival end 502 and be nested in main pipe outlet section 104; Cross in body of wall 5 and be provided with cone barrel swirling flow pipe 6, cone barrel swirling flow pipe 6 is cone barrel shape, comprise swirling flow pipe osculum end 601 and swirling flow pipe big opening end 602, the inner-walls of duct of cone barrel swirling flow pipe 6 is provided with swirling flow baffle plate 603, and the tangent line of swirling flow baffle plate 603 guide curve surface and the angle of vertical plane are 20 °.In addition, the internal diameter of swirling flow pipe big opening end 602 pipe diameter and main pipe outlet section 104 pipeline is suitable, swirling flow pipe osculum end 601 pipe diameter is suitable with the internal diameter crossing the body of wall port of export 501 pipeline, embed in main pipe outlet section 104 installing and using swirling flow pipe big opening end 602 in process, swirling flow pipe osculum end 601 withstood on the boss place of the body of wall port of export 501, therefore, cone barrel swirling flow pipe 6 was just in time stuck between body of wall 5 and main pipe 1.
Swirling flow five-way tubing in the present embodiment is easy for installation, be applicable to the co-layer draining of high residential building washroom, realize quiet draining, the vertical section of the longitudinal side branch on five-way tubing is oval, construction layer thickness can be reduced to original about 3/4, save construction cost in the work progress carrying out Homofloor drainage system, improve the space availability ratio of washroom, and the bearing capacity of longitudinal side branch is the strongest, not easily by pressure break, long service life.

Claims (9)

1. a co-layer draining swirling flow five-way tubing, comprise main pipe (1), laterally the first arm (2), laterally the second arm (3) and longitudinal side branch (4), main pipe (1) comprises main pipe entrance (101), main pipe linkage section (102), main pipe Connectivity Section (103) and main pipe outlet section (104), main pipe entrance (101), main pipe linkage section (102), main pipe Connectivity Section (103) and main pipe outlet section (104) integrated molding form main pipe (1), laterally the first arm (2) is positioned at relative both sides, main pipe Connectivity Section (103) with horizontal second arm (3), be communicated with main pipe Connectivity Section (103) respectively, longitudinal side branch (4) is communicated with main pipe Connectivity Section (103), longitudinal side branch (4) pipeline axis and main pipe Connectivity Section (103) inner-walls of duct profile tangent, it is characterized in that: the vertical section of described longitudinal side branch (4) is for oval, and oval major axis is (5 ~ 4) with the length ratio of minor axis: 3.
2. a kind of co-layer draining swirling flow five-way tubing according to claim 1, is characterized in that: the major axis of described ellipse and the length of minor axis are than being 4:3.
3. a kind of co-layer draining swirling flow five-way tubing according to claim 1, it is characterized in that: described longitudinal side branch (4) comprises longitudinal side branch linkage section (401) and longitudinal side branch entrance (402), the angle α of longitudinal side branch linkage section (401) pipeline left surface and main pipe (1) pipeline axis is 60 ~ 75 °.
4. a kind of co-layer draining swirling flow five-way tubing according to claim 3, is characterized in that: described longitudinal side branch entrance (402) pipeline axis is vertical with main pipe (1) pipeline axis.
5. a kind of co-layer draining swirling flow five-way tubing according to claim 3, is characterized in that: described longitudinal side branch entrance (402) pipeline axis is with laterally the first arm (2) pipeline axis is vertical.
6. a kind of co-layer draining swirling flow five-way tubing according to claim 1, is characterized in that: be connected shaping by the transition of cone barrel pipeline between main pipe linkage section (102) with main pipe Connectivity Section (103).
7. a kind of co-layer draining swirling flow five-way tubing according to claim 1, it is characterized in that: described main pipe outlet section (104) was connected with body of wall (5), cross body of wall (5) comprised the body of wall port of export (501) and crossed body of wall arrival end (502), cross body of wall arrival end (502) and be nested in main pipe outlet section (104).
8. a kind of co-layer draining swirling flow five-way tubing according to claim 7, it is characterized in that: described crossing in body of wall (5) is provided with cone barrel swirling flow pipe (6), cone barrel swirling flow pipe (6) is cone barrel shape, comprise swirling flow pipe osculum end (601) and swirling flow pipe big opening end (602), the internal diameter of swirling flow pipe big opening end (602) pipe diameter and main pipe outlet section (104) pipeline is suitable, and swirling flow pipe osculum end (601) pipe diameter is suitable with the internal diameter crossing the body of wall port of export (501) pipeline.
9. a kind of co-layer draining swirling flow five-way tubing according to claim 8, it is characterized in that: the inner-walls of duct of described cone barrel swirling flow pipe (6) is provided with swirling flow baffle plate (603), the tangent line of swirling flow baffle plate (603) guide curve surface and the angle of vertical plane are 20 ~ 40 °.
CN201520824492.6U 2015-10-20 2015-10-20 With layer drainage swirling flow five -way pipe fitting Active CN205077562U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2563032A (en) * 2017-05-30 2018-12-05 Polypipe Ltd Soil and waste pipe
CN110284714A (en) * 2019-07-10 2019-09-27 龙信建设集团有限公司 Five wildcard part of co-layer draining and captation combined type construction method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2563032A (en) * 2017-05-30 2018-12-05 Polypipe Ltd Soil and waste pipe
GB2563032B (en) * 2017-05-30 2021-09-15 Polypipe Ltd Soil and waste pipe
CN110284714A (en) * 2019-07-10 2019-09-27 龙信建设集团有限公司 Five wildcard part of co-layer draining and captation combined type construction method

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