CN106090495A - A kind of built-in type list standpipe eddy flow threeway - Google Patents

A kind of built-in type list standpipe eddy flow threeway Download PDF

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Publication number
CN106090495A
CN106090495A CN201610485387.3A CN201610485387A CN106090495A CN 106090495 A CN106090495 A CN 106090495A CN 201610485387 A CN201610485387 A CN 201610485387A CN 106090495 A CN106090495 A CN 106090495A
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CN
China
Prior art keywords
eddy flow
built
connecting tube
type list
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610485387.3A
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Chinese (zh)
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CN106090495B (en
Inventor
张岳岐
罗健
王太强
李富彬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHENGDU CHUANGXING TECHNOLOGY PLASTICE INDUSRTY Co Ltd
Original Assignee
CHENGDU CHUANGXING TECHNOLOGY PLASTICE INDUSRTY Co Ltd
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Priority to CN201610485387.3A priority Critical patent/CN106090495B/en
Publication of CN106090495A publication Critical patent/CN106090495A/en
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Publication of CN106090495B publication Critical patent/CN106090495B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00Branching pipes; Joining pipes to walls
    • F16L41/02Branch units, e.g. made in one piece, welded, riveted
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L5/00Devices for use where pipes, cables or protective tubing pass through walls or partitions
    • F16L5/02Sealing
    • F16L5/04Sealing to form a firebreak device
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02Energy absorbers; Noise absorbers
    • F16L55/027Throttle passages
    • F16L55/02772Throttle passages using spirally or helically shaped channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/04Devices damping pulsations or vibrations in fluids
    • F16L55/045Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer

Abstract

The present invention relates to a kind of built-in type list standpipe eddy flow threeway, including supervisor, upper connecting tube, lower connecting tube, horizontal connection tube, spiral bar, the upper and lower and side of supervisor is respectively equipped with opening, installs connecting tube at upper shed, lower opening installs lower connecting tube, installs horizontal connection tube at lateral opening;Lower connecting tube is funnel-shaped structure, and upper end is connector in down tube, and middle part is taper pipeline section, and bottom is straight length, and bottom is seal groove, and taper pipeline section is provided with axially mounted spiral bar;Taper pipeline section upper outside is provided with seal ring, and lower outside is provided with reducing ring, and reducing ring extends downwardly into seal groove upper end on straight length, and seal groove diameter is more than straight length, is used for installing combined seal ring;All general with the construction drainage straight pipeline of built-in type list standpipe eddy flow threeway upper and lower side is connected cooperation.The present invention, by straight pipeline can be to be mounted directly in floor the design of lower connecting pipe structure, strengthens eddy flow threeway sealing and steadiness, it is simple to install fire trapping ring simultaneously.

Description

A kind of built-in type list standpipe eddy flow threeway
Technical field
The present invention relates to single standpipe drainage pipeline for building, particularly to one with layer built-in type list standpipe eddy flow tee T Road.
Background technology
Building drainage pipeline requires have quick and powerful drainability, and does not produce too high drainage noise.Row Water noise collides generation vibration during flowing downward mainly due to water and forms with the air-flow risen, and meanwhile, air-flow hinders Stagnant also can affect water velocity.Therefore, eddy flow three-way pipeline being widely used in construction drainage field, the structure of its uniqueness can make water Stream againsts tube wall flowing, is farthest separated by the air-flow in the current of decline and pipeline in limited pipeline space, with Reduce noise pollution.
" swirling-flow noise-reduction joint used in construction drainage " of Application No. 200810100257.9 discloses a kind of used in construction drainage Swirling-flow noise-reduction joint, including adapter body, the upper and lower of main body has main riser interface and side to have horizontal branch pipe interface, its joint master Body includes horizontal arm connector, upper main riser connector and lower main riser connector, and lower main riser connector is round table-like leakage Bucket type, has lower flow guide sleeve, the inwall of lower flow guide sleeve to be shaped with spiral bar second in funnel type, horizontal arm connector external diameter more than upper, The external diameter of lower main riser interface, horizontal branch pipe interface is connected with horizontal arm connector through spiral stream guidance water channel.This structure is to be also mesh The structural models of front most of eddy flow three-way pipeline, and eddy flow three-way pipeline of the prior art is mostly attached directly to floor Cement in, connecting the straight pipeline of upper and lower two-layer floor respective eddy flow three-way pipeline is mostly to pacify while building is fixed Dress is fixing, needs to change if later stage straight pipeline goes wrong, after sawed-off straight pipeline, because upper and lower two eddy flow three-way pipelines For fixed structure, and the straight pipeline that length is also fixing, new is difficult to according to snapping in situ, it is necessary to by the connection dress of auxiliary Put, from edgewise bend one section, connect new straight pipeline, straight pipeline could be installed and put in place, as shown in Figure 1.Auxiliary connecting device Cost is higher, takes up room bigger, simultaneously because it has ductility, sealing than the first straight pipeline installed can under Fall.Main riser interface length in bottom is shorter simultaneously, and wall thickness is relatively thin, and joint vibration is relatively big easily to be loosened and cracks.Under and Connected mode between main riser connector and horizontal arm connector is upper outside lower interior, after long-term use, internal the most downward The liquid of flowing is easily top-down from gap to be leaked out.And in floor duct fire requires, it is generally required at pipe Arranging fire trapping ring outside road, fire trapping ring is set in threeway eddy flow bottom and is embedded in advance in floor, for when breaking out of fire, and can be In the case of flatulence of heat type, pinch off closes tee T, so that its closing prevents fire from spreading to levels, and existing tee T lower end Pyramidal structure often, it is difficult to install the fire trapping ring of column.
Summary of the invention
For the problems referred to above, it is an object of the invention to the deficiency overcoming prior art to exist, it is provided that one can be easy to peace The built-in type list standpipe eddy flow threeway of dress straight pipeline, it saves by arranging Simple telescopic in lower section, and it is real to use composite rim to coordinate Now seal, it is achieved straight pipeline can be installed in upper and lower two-layer built-in type list standpipe eddy flow threeway quickly and easily, simultaneously facilitates peace Dress fire prevention composite rim.
The technical scheme is that and be achieved in that:
A kind of built-in type list standpipe eddy flow threeway, including supervisor, upper connecting tube, lower connecting tube, horizontal connection tube, spiral Muscle;Upper and lower and the side of described supervisor is respectively equipped with opening, installs connecting tube at upper shed, and lower opening installs lower connection Pipe, installs horizontal connection tube at lateral opening;Described lower connecting tube is funnel-shaped structure, and upper end is connector in down tube, middle part For taper pipeline section, bottom is straight length, and bottom is seal groove, and described taper pipeline section is provided with axially mounted spiral bar;Taper Pipeline section upper outside is provided with seal ring, and lower outside is provided with reducing ring, and reducing ring extends downwardly on seal groove on straight length End, described flow development length is 100cm, and described seal groove diameter is more than straight length diameter, and seal groove is provided with screw thread, is used for pacifying Dress combined seal ring;All general with the construction drainage straight pipeline in described built-in type list standpipe eddy flow threeway top and bottom is connected joins Close.
Further, described reducing number of rings amount is 10-20, and each reducing ring external diameter is 125mm.For installing column Fire trapping ring so that it is when meeting fire burning, fire spreading can be prevented with connecting tube under pinch off.
Further, described spiral bar quantity is 6, and adjacent two spiral bars are spaced apart 60 degree.
Further, longitudinally it is being provided with 4 studs, 4 stud edges outside described straight length and conical pipe pars infrasegmentalis Supervisor axle center array, stud connects all reducing rings from top to bottom, strengthens the connective stability of reducing ring with this.
Further, described conical pipe pars infrasegmentalis and straight length junction are provided with up-small and down-big step, to guarantee in peace The when of dress straight pipeline, straight pipeline will not be wounded spiral bar.
Further, described combined seal ring includes the plastic mounting ring of outside and internal sealing ring, is arranged on sealing To guarantee the sealing between lower connecting tube and straight pipeline in groove.
Further, in described down tube, connector is enclosed within supervisor's lower end outside, it is ensured that liquid when flowing from top to bottom not Can from side direct seepage and from down tube connector and supervisor lower end gap flow downward out.
Further, two shunting ribs it are provided with inside described supervisor upper end, for the gas-liquid that will flow from top to bottom in advance Mixture is tentatively broken up.
Further, described supervisor, upper connecting tube, lower connecting tube, horizontal connection tube are PVC material, and attachment structure is equal For detachable, connected by fluid sealant during installation and fasten.
Further, described lower connection pipeline section outer surface all does dermatoglyph and processes, to increase the floor that pipeline and cement pour Between frictional force, and play and certain prevent the defluent effect of upper water.
It is an advantage of the current invention that:
1, by setting up straight length in lower connecting tube, play the effect of Simple telescopic joint, straight pipeline can be mounted directly In upper and lower two-layer built-in type list standpipe eddy flow threeway, it is convenient for changing straight pipeline, it is not necessary to use other adapting device;
2, by arranging dermatoglyph, the fixed effect of built-in type list standpipe eddy flow threeway and cement LIFT is increased;
3, connector in down tube is wrapped in supervisor's lower end outside, even if there is the situation of part seal failure in fluid sealant, Because the trend in gap be interior under outside upper, the water that flows from the top down also is difficult to by supervisor and down tube between connector Wall gap seepage flow goes out;
4, seal ring is set on taper pipeline section top, even if there being a small amount of water gap of connector and supervisor from down tube to ooze Go out, also can flow to seal ring along outer side surface, do not fall out in lower floor room;
5, by arranging shunting rib, in advance gas-liquid mixture is broken up, reduce the workload of lower part helical muscle, reduce noise The phenomenon concentrated;
6, by arranging stud, the connection strengthened between reducing ring is fixed, and strengthens further with this being cast in cement The stability of lower connecting tube, it is ensured that straight pipeline connects sealing effectiveness;
7, by arranging reducing ring, taper pipeline section and straight length external diameter is allowed to be 125mm, it is simple to the back-fire relief of column is installed Circle.
Accompanying drawing explanation
Fig. 1 is the mounting structure schematic diagram of prior art;
Fig. 2 is the sectional view of the structural representation front view of the present invention;
Fig. 3 is the structural representation rearview of the present invention;
Fig. 4 is the structural representation axonometric chart of the present invention;
Fig. 5 is the structural representation top view of the present invention;
Fig. 6 is the installation procedure schematic diagram of the present invention;
Fig. 7 is the location diagram that the present invention installs with fire trapping ring.
In figure: 1 is supervisor, 11 is shunting rib, and 2 is upper connecting tube, and 3 is lower connecting tube, and 31 is seal groove, and 32 down tubes connect Interface, 33 is reducing ring, and 34 is seal ring, and 35 is stud, and 4 is horizontal connection tube, and 5 is spiral bar, and 6 is straight pipeline, and 7 is back-fire relief Circle.
Detailed description of the invention
The present invention is described in further detail with preferred embodiment below in conjunction with the accompanying drawings, but is not intended that the present invention Any restriction.
As shown in Figure 2 to 7, a kind of built-in type list standpipe eddy flow threeway, including being responsible for 1, upper connecting tube 2, lower connecting tube 3, horizontal connection tube 4, spiral bar 5;Upper and lower and the side of described supervisor 1 is respectively equipped with opening, installs connecting tube at upper shed 2, lower opening installs lower connecting tube 3, installs horizontal connection tube 4, be provided with two points inside described supervisor 1 upper end at lateral opening Stream rib 11;Described lower connecting tube 3 is funnel-shaped structure, and upper end is connector 32 in down tube, and middle part is taper pipeline section, and bottom is straight Pipeline section, bottom is seal groove 34, and described taper pipeline section is provided with axially mounted spiral bar 5;Taper pipeline section upper outside is provided with Seal ring 34, lower outside is provided with reducing ring 33, and reducing ring 33 extends downwardly into seal groove 31 upper end, described change on straight length Footpath ring 33 thickness is 5mm, diameter 8mm bigger than straight length external diameter, is spaced apart 5mm between each reducing ring 33;Described straight length A length of 100cm, described seal groove 31 diameter is more than straight length diameter, is used for installing combined seal ring;Described straight length and cone Shape pipeline section lower outside is at longitudinal 35,4 studs 35 of 4 studs that are provided with along being responsible for 1 axle center array, and stud 35 connects from upper All reducing rings 33 under to, strengthen the connective stability of reducing ring 33 with this;In described down tube, connector 32 is enclosed within supervisor 1 time Outside end, it is ensured that liquid when flowing from top to bottom will not from side direct seepage and from down tube connector 32 and supervisor 1 time The gap of end flows downward out;Described conical pipe pars infrasegmentalis and straight length junction are provided with up-small and down-big step, described built-in type All general with the construction drainage straight pipeline 6 in single standpipe eddy flow threeway top and bottom is connected cooperation, described combination sealing ring cross-section For rectangular configuration, it is arranged in seal groove 34, to guarantee the sealing between lower connecting tube 3 and straight pipeline 6;Described supervisor 1, on Connecting tube 2, lower connecting tube 3, horizontal connection tube 4 are PVC material, and attachment structure is detachable, by sealing during installation Glue connects and fastening;Described lower connecting tube 3 outer surface all does dermatoglyph and processes, to increase pipeline and between the floor that cement pours Frictional force, and play and certain prevent the defluent effect of upper water;Described reducing number of rings amount is 10-20, outside each reducing ring Footpath is 125mm, and the straight tube external diameter of rule is for installing the fire trapping ring 7 of column, and the taper pipeline section solving existing pipeline cannot The problem installing fire trapping ring 7 so that it is when meeting fire burning, fire spreading can be prevented with connecting tube 3 under pinch off;33 sections of reducing ring It is not configured to the condition of equivalent thickness external diameter of integration, and selects to arrange dentalation, be in order at difficulty of processing and consider;Described spiral bar 5 quantity are 6, and adjacent two spiral bars 5 are spaced apart 60 degree, and the angle angle of each spiral bar 5 and horizontal plane is 50 degree.
As it is shown in fig. 7, the cylindrical straight barrel structure that fire trapping ring 7 is length about 5cm, it is set in outside lower connecting tube 3 upper end Reducing ring 33 on, pour in cement floors.When breaking out of fire in building when, fire layer temperature raises so that be sheathed on Lower connecting tube 3 is cut off and compressed to fire trapping ring 7 temperature distortion outside reducing ring 33 also, blocks the runner to the upper and lower, anti- Toxic gas after only the intensity of a fire and plastic product burn spreads.
Between built-in type list standpipe eddy flow threeway and floor produce micro gap, water when micro gap flows downward, Portion of water can be stored at dermatoglyph and gradually evaporate, reducing the situation that water droplet drips to lower floor.
Embodiment 1:
As shown in Fig. 2, Fig. 5, after water body enters built-in type list standpipe eddy flow threeway from upper connecting tube 2, it is split rib 11 Breaing up, allow the portion gas swept along by water body overflow, current continue traveling downwardly and pass through spiral bar 5 and produce eddy flow, further by gas Body discharges, and water is continued traveling downwardly by lower connecting tube 3 and finally discharged, and gas is up and discharges.
Embodiment 2:
As shown in Figure 6, when needing to replace with a new straight pipeline 6 between lower two-layer floor, use flexible socket joint The method connected, takes out former straight pipeline 6, and new straight pipeline 6 outer sheath loads onto combined seal ring, is stretched into straight pipeline 6 upper end The lower connecting tube 3 of upper strata floor built-in type list standpipe eddy flow threeway, now has certain toughness, and two due to the straight pipeline 6 of PVC Straight pipeline 6 length used between floor plate is generally higher than three meters, and the straight pipeline 6 of such length can be by pipe shaft after upper end is stretched into Slight bending, allows straight pipeline 6 upper end continue upper shifting, and lower end is not by the upper connecting tube of lower floor's floor built-in type list standpipe eddy flow threeway 2 block;Straight pipeline 6 upper end arrives straight length top, after contacting with conical pipe pars infrasegmentalis, owing to straight length has 100mm length, empty Between enough allow straight pipeline 6 upper end stretch into, the bottom of straight pipeline 6 is upper already above lower floor's floor built-in type list standpipe eddy flow threeway The mouth of pipe of connecting tube 2, now just returns by straight pipeline 6 bottom, recovers the linear state of straight pipeline 6;Straight pipeline 6 is moved down into In the upper connecting tube 2 of lower floor's floor built-in type list standpipe eddy flow threeway, owing to the lower end of upper connecting tube 2 also is provided with up big and down small Step, therefore can position straight pipeline 6 and seal, and is now moved upwards up to being set in the combined seal ring outside straight pipeline 6 Screwing in seal groove and with it, make whole straight pipeline 6 connect fixing and seal, complete the replacing operation of straight pipeline 6, it was installed In journey, the moving direction of straight pipeline 6 is as shown the direction of arrow in Figure 5.
The above, be only presently preferred embodiments of the present invention, and the present invention not makees any pro forma restriction, though So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any technology people being familiar with this specialty Member, in the range of without departing from technical solution of the present invention, when the technology contents of available the disclosure above makes a little change or modification For the Equivalent embodiments of equivalent variations, as long as being the content without departing from technical solution of the present invention, the technical spirit of the foundation present invention Any simple modification, equivalent variations and the modification being made above example, all still falls within the range of technical solution of the present invention.

Claims (10)

1. a built-in type list standpipe eddy flow threeway, including supervisor, upper connecting tube, lower connecting tube, horizontal connection tube, spiral bar; Upper and lower and the side of described supervisor is respectively equipped with opening, installs connecting tube at upper shed, and lower opening installs lower connecting tube, side Face opening part installs horizontal connection tube;Described lower connecting tube is funnel-shaped structure, and upper end is connector in down tube, and middle part is taper Pipeline section, bottom is straight length, and bottom is seal groove, and described taper pipeline section is provided with axially mounted spiral bar;On taper pipeline section Being provided with seal ring outside portion, lower outside is provided with reducing ring, and reducing ring extends downwardly into seal groove upper end on straight length, described Flow development length is 100cm, and described seal groove diameter is more than straight length diameter, and seal groove is provided with screw thread, is used for installing combination Sealing ring;All general with the construction drainage straight pipeline in described built-in type list standpipe eddy flow threeway top and bottom is connected cooperation.
A kind of built-in type list standpipe eddy flow threeway the most according to claim 1, it is characterised in that described reducing number of rings amount is 10-20, each reducing ring external diameter is 125mm;For installing the fire trapping ring of column so that it is when meeting fire burning, can be with pinch off Lower connecting tube, prevents fire spreading.
A kind of built-in type list standpipe eddy flow threeway the most according to claim 1, it is characterised in that described spiral bar quantity is 6, adjacent two spiral bars are spaced apart 60 degree.
A kind of built-in type list standpipe eddy flow threeway the most according to claim 1, it is characterised in that described straight length and taper Pipeline section lower outside is longitudinally being provided with 4 studs, and 4 studs are along supervisor axle center array, and stud connects all changes from top to bottom Footpath ring.
A kind of built-in type list standpipe eddy flow threeway the most according to claim 1, it is characterised in that described conical pipe pars infrasegmentalis It is provided with up-small and down-big step with straight length junction.
A kind of built-in type list standpipe eddy flow threeway the most according to claim 1, it is characterised in that described combined seal ring bag Include the plastic mounting ring of outside and internal sealing ring, be arranged in seal groove close with guarantee between lower connecting tube and straight pipeline Feng Xing.
A kind of built-in type list standpipe eddy flow threeway the most according to claim 1, it is characterised in that inside described supervisor upper end It is provided with two shunting ribs.
A kind of built-in type list standpipe eddy flow threeway the most according to claim 1, it is characterised in that connector in described down tube It is enclosed within supervisor's lower end outside.
A kind of built-in type list standpipe eddy flow threeway the most according to claim 1, it is characterised in that described supervisor, upper connection Pipe, lower connecting tube, horizontal connection tube are PVC material, and attachment structure is detachable, during installation by fluid sealant connect and Fastening.
A kind of built-in type list standpipe eddy flow threeway the most according to claim 1, it is characterised in that described lower connection pipeline section Outer surface all does dermatoglyph and processes.
CN201610485387.3A 2016-06-28 2016-06-28 A kind of built-in type list standpipe eddy flow threeway Active CN106090495B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106480944A (en) * 2016-12-20 2017-03-08 湖南睿凡同层排水科技有限公司 Swirling flow generator tube and cyclone type drainage arrangement

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JP2006299685A (en) * 2005-04-22 2006-11-02 Takiron Co Ltd Drainage header
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CN203363503U (en) * 2013-07-03 2013-12-25 江山市昌盛塑胶厂 Rotational flow pipe fitting of special single vertical pipe
CN203546877U (en) * 2013-09-18 2014-04-16 杭州宏升塑胶有限公司 Special pipe fitting for single vertical pipe of right four-way polypropylene mute drainage pipeline system
CN203585600U (en) * 2013-11-28 2014-05-07 山东大正新材料科技有限公司 Swirling drain pipe with noise reduction effect
CN204611107U (en) * 2015-05-21 2015-09-02 杨挺 Eddy flow lower contact

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006299685A (en) * 2005-04-22 2006-11-02 Takiron Co Ltd Drainage header
CN203145117U (en) * 2013-02-25 2013-08-21 爱康企业集团(上海)有限公司 Hydrocyclone used in single stack drainage system
CN203363503U (en) * 2013-07-03 2013-12-25 江山市昌盛塑胶厂 Rotational flow pipe fitting of special single vertical pipe
CN203546877U (en) * 2013-09-18 2014-04-16 杭州宏升塑胶有限公司 Special pipe fitting for single vertical pipe of right four-way polypropylene mute drainage pipeline system
CN203585600U (en) * 2013-11-28 2014-05-07 山东大正新材料科技有限公司 Swirling drain pipe with noise reduction effect
CN204611107U (en) * 2015-05-21 2015-09-02 杨挺 Eddy flow lower contact

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106480944A (en) * 2016-12-20 2017-03-08 湖南睿凡同层排水科技有限公司 Swirling flow generator tube and cyclone type drainage arrangement

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