CN107268731A - A kind of voltage regulation type drainage arrangement and construction method - Google Patents

A kind of voltage regulation type drainage arrangement and construction method Download PDF

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Publication number
CN107268731A
CN107268731A CN201710554877.9A CN201710554877A CN107268731A CN 107268731 A CN107268731 A CN 107268731A CN 201710554877 A CN201710554877 A CN 201710554877A CN 107268731 A CN107268731 A CN 107268731A
Authority
CN
China
Prior art keywords
trap
pipe
voltage regulation
vent
drainage arrangement
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.)
Pending
Application number
CN201710554877.9A
Other languages
Chinese (zh)
Inventor
谭万春
李金倍
王姗姗
王锦峰
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.)
China Railway No 2 Engineering Group Co Ltd
China Railway Erju 4th Engineering Co Ltd
Original Assignee
China Railway Erju Co Ltd
China Railway No 2 Engineering Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Railway Erju Co Ltd, China Railway No 2 Engineering Group Co Ltd filed Critical China Railway Erju Co Ltd
Priority to CN201710554877.9A priority Critical patent/CN107268731A/en
Publication of CN107268731A publication Critical patent/CN107268731A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03CDOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03CDOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
    • E03C1/28Odour seals
    • E03C1/284Odour seals having U-shaped trap
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03CDOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
    • E03C1/28Odour seals
    • E03C1/294Odour seals with provisions against loss of water lock

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sink And Installation For Waste Water (AREA)

Abstract

The invention discloses a kind of voltage regulation type drainage arrangement, including trap, the trap is connected by vertical drainage pipe with floor drain, the trap is connected by horizontal drain pipe with soil stack, some branch drains are connected with the vertical drainage pipe and the horizontal drain pipe, blow vent is additionally provided with the trap, the blow vent is connected by vent branch with vent stack.Trap collects a variety of water sources, ensure that trap water source supply, it is to avoid cause water source supplement not enough in single water source, it is ensured that water seal is permanently effective.Trap is connected by vent stack with air, is difficult by pipeline pressure influence, water seal is survivable.The discharge of the water such as all kitchens, toilet can be solved by 13 traps, is easy to install and maintain, solves to easily cause the problem of curved many easily stifled difficult dredgings, impeded drainage, cleaning and inconvenient maintenance when setting multiple traps.

Description

A kind of voltage regulation type drainage arrangement and construction method
Technical field
The present invention relates to feedwater and drainage pipeline project technical field, more particularly to a kind of voltage regulation type drainage arrangement and construction Method.
Background technology
Trap refer to inside sanitary apparatus or fixture drain section on set it is a kind of in have the accessory of water seal, its Main function is to prevent the gas in sewerage system from scurrying into interior.The water column of certain altitude is referred to as water seal in trap, it Various dusty gas and small worm in drainage pipeline can be prevented to get in.Due to trap have it is simple in construction, easy for installation The features such as, it is widely used in building field.
The water seal of existing trap also has due to indoor sanitation in addition to because of water seal depth, the reason such as inadequate is subject to destruction Utensil is long using the intermittent time, especially floor drain, and long-term does not supplement water, the constantly evaporation of the water seal water surface and loses water seal work With this is to cause the main cause that foul smell is escaped in drainpipe.With the increasingly raising of living standard, to architecture quality requirement More and more higher, requirement of the resident family to drainpipe deodorization also more and more higher, therefore need trap water filling of the timing to floor drain, keeps one Determine water seal height.
Present architectural design, kitchen, the corresponding interface of each sanitary ware of toilet are installed one and independent deposited Water is curved, water seal arrangement, and mounting process is complicated, curved many easily stifled difficult dredgings, impeded drainage, cleaning and inconvenient maintenance.
The weak point that this independently installed conventional discharge device is embodied is mainly:
1. trap seal height is not enough, total water-holding quantity is not enough, easily occurs damage of water block;
2. each water consumption device is connected and without breather pipe connection, easily influenceed by air pressure change in pipeline, because siphonage causes water Envelope destruction;
3. water source source is single, without permanently effective water source supply, influenceed in temperature higher season by evaporation, water Evaporate and without water source supplement, destroy water seal;
4. curved many easily stifled difficult dredgings, impeded drainage, cleaning and inconvenient maintenance.
The content of the invention
It is an object of the invention to overcome in the presence of prior art above-mentioned not enough there is provided a kind of voltage regulation type drainage arrangement And construction method.
In order to realize foregoing invention purpose, the invention provides following technical scheme:
A kind of voltage regulation type drainage arrangement, including trap, the trap are connected by vertical drainage pipe with floor drain, institute State trap by horizontal drain pipe with soil stack to be connected, connected on the vertical drainage pipe and the horizontal drain pipe Have and blow vent is additionally provided with some branch drains, the trap, the blow vent is connected by vent branch with vent stack Connect.
Existing utensils for kitchen & toilet includes washbowl/vegatable basin/wash basin draining, shower drain/bathtub drainage, washing machine row Water, w.c.pan draining are all connected and communicated with trap by drainpipe, then trap collects a variety of water sources, phase Individually correspond to a trap connection to each existing utensils for kitchen & toilet branch, caused each trap source is single water Source and cause the problem of each trap water source supplement is not enough, ensure that trap water source supply is sufficient and water seal has for a long time Effect.Trap is connected by vent stack with air, is difficult by pipeline pressure influence, water seal is survivable.
Preferably, the vent stack and the soil stack are attached by the connecting pipe being obliquely installed, so that The air pressure in the soil stack can be reduced.
Preferably, the quantity for the trap being provided with the present apparatus is 1-3, the company of series connection between each trap Connect.The discharge of the water such as all kitchens, toilet can be solved by 1 trap, is easy to install and maintain, solves to set many The problem of curved many easily stifled difficult dredgings, impeded drainage, cleaning and inconvenient maintenance is easily caused during individual trap.If branch drain is more Or it is distant, single trap can not be met when requiring, 2-3 trap can be set.
Preferably, the trap is S type structures, so as to obtain more preferable water seal effect.Preferably, the trap For p-type structure, limited by field condition, situations such as not enough ceiling height or limited branch pipe connection angle such as occur can deposit S types Water is curved to be changed to p-type trap.
Preferably, access hole is additionally provided with the trap, once occur stopping state, without professional tool Cleaning maintenance.
A kind of construction method of voltage regulation type drainage arrangement, including a kind of above-mentioned voltage regulation type drainage arrangement, its construction method Comprise the following steps:
Step one:Major structure of construction is constructed, after form work engineering completion, and bottom layer of the reinforcing steel carries out unwrapping wire before laying, to health Between and the trap in pipe well, vent stack, soil stack, vertical drainage pipe, horizontal drain pipe and some branch drains carry out Positioning, reserving hole or pipe fitting;
Step 2:Reinforcement engineering construction, after reinforcement engineering construction is finished, recycles the materials such as screw rod, reinforcing bar pre- to correlation Stay part to be attached fixation, and nursed in concreting process, it is ensured that reserving hole or pipe fitting accurate and effective;
Step 3:Water supply and sewage work are installed, and some branch drains are accessed into vertical drainage pipe or horizontal drain pipe.
Step 4:By the water it is curved on blow vent be connected by vent branch with vent stack, complete voltage regulation type row The construction and installation of water installations.
Just the various pipelines needed for drainage arrangement are carried out with positioning in the major structure of construction construction stage pre-buried, in discharge Hydraulic Projects erection stage, only need to access some branch drains vertical drainage pipe or horizontal drain pipe, quick and easy for installation, peace Fill error small, precision is high.
Compared with prior art, the beneficial effect of voltage regulation type drainage arrangement of the present invention:
(1) trap is connected by vent stack with air, is difficult by pipeline pressure influence, water seal is survivable.
(2) trap collects a variety of water sources, particularly collects the drainings such as washbowl, vegatable basin, wash basin and uses frequently The water source of point, ensure that trap water source supply, it is to avoid cause water source supplement not enough in single water source, it is ensured that water seal has for a long time Effect.
(3) discharge of the water such as all kitchens, toilet can be solved by 1-3 trap, is easy to install and maintain, Solve to easily cause the problem of curved many easily stifled difficult dredgings, impeded drainage, cleaning and inconvenient maintenance when setting multiple traps.
(4) elbow is equipped with access hole after trap, once occur stopping state, can be clear without professional tool Clean maintenance.
Compared with prior art, the beneficial effect of the construction method of voltage regulation type drainage arrangement of the present invention:
Just the various pipelines needed for drainage arrangement are carried out with positioning in the major structure of construction construction stage pre-buried, in discharge Hydraulic Projects erection stage, only need to access some branch drains vertical drainage pipe or horizontal drain pipe, quick and easy for installation, peace Fill error small, precision is high.
Brief description of the drawings:
Fig. 1 is a kind of structural representation of voltage regulation type drainage arrangement of the present invention;
Fig. 2 is the structural representation of S types trap of the present invention;
Fig. 3 is the structural representation of p-type trap of the present invention.
Marked in figure:1- traps, 2- vertical drainage pipes, 3- floor drains, 4- horizontal drain pipes, 5- soil stacks, 6- drainings Branch pipe, 7- blow vents, 8- vent branch, 9- vent stacks, 10- access holes, 11- connecting pipes.
Embodiment
With reference to test example and embodiment, the present invention is described in further detail.But this should not be understood Following embodiment is only limitted to for the scope of above-mentioned theme of the invention, it is all that this is belonged to based on the technology that present invention is realized The scope of invention.
Embodiment 1
As shown in figure 1, a kind of voltage regulation type drainage arrangement, including trap 1, the trap 1 passes through the He of vertical drainage pipe 2 Floor drain 3 is connected, and the trap is connected by horizontal drain pipe 4 with soil stack 5, in the vertical drainage pipe 2 and institute State to be connected with horizontal drain pipe 4 on some branch drains 6, the trap and be additionally provided with blow vent 7, the blow vent 7 passes through Vent branch 8 is connected with vent stack 9.The vent stack 9 and the soil stack 5 pass through the connecting pipe that is obliquely installed 11 are attached.
Existing utensils for kitchen & toilet includes washbowl/vegatable basin/wash basin draining, shower drain/bathtub drainage, washing machine row Water, w.c.pan draining are all connected and communicated with trap 1 by drainpipe, then trap 1 collects a variety of water sources, Each relatively existing utensils for kitchen & toilet branch individually corresponds to a trap connection, and caused each trap source is single Water source and cause the problem of each trap water source supplement is not enough, ensure that the water source supply of trap 1 is sufficient and water seal is long-term Effectively.Trap 1 is connected by vent stack 9 with air, is difficult by pipeline pressure influence, water seal is survivable.
As shown in Fig. 2 the trap is S type structures, the S type structures are a kind of S type structures positioned at horizontal direction, from And more preferable water seal effect can be obtained.As shown in figure 3, the trap 1 is p-type structure, is limited, such as hung by field condition Situations such as heights of roofs is not enough or branch pipe connection angle is limited, can be changed to p-type trap by S type traps.
The quantity of the trap is preferably 1-3.All kitchens, toilet etc. can be solved by 1-3 trap With the discharge of water, it is easy to install and maintain, solves to easily cause curved many easily stifled difficult dredgings when setting multiple traps, draining is not Freely, cleaning and the problem of inconvenient maintenance.
Access hole 10 is additionally provided with the trap 1, is cleanable without professional tool once occurring stopping state Maintenance.
Embodiment 2
A kind of construction method of voltage regulation type drainage arrangement, including a kind of above-mentioned voltage regulation type drainage arrangement, its construction method Comprise the following steps:
Step one:Major structure of construction is constructed, after form work engineering completion, and bottom layer of the reinforcing steel carries out unwrapping wire before laying, to health Between and the trap 1 in pipe well, vent stack 9, soil stack 5, vertical drainage pipe 2, horizontal drain pipe 4 and some branch drains 6 are positioned, reserving hole or pipe fitting;
Step 2:Reinforcement engineering construction, after reinforcement engineering construction is finished, recycles the materials such as screw rod, reinforcing bar pre- to correlation Stay part to be attached fixation, and nursed in concreting process, it is ensured that reserving hole or pipe fitting accurate and effective;
Step 3:Water supply and sewage work are installed, and some branch drains 6 are accessed into vertical drainage pipe 2 or horizontal drain pipe 4.
Step 4:Blow vent 7 on the water curved 1 is connected by vent branch 8 with vent stack 9, voltage stabilizing is completed The construction and installation of type drainage arrangement.
Just the various pipelines needed for drainage arrangement are carried out with positioning in the major structure of construction construction stage pre-buried, in discharge Hydraulic Projects erection stage, only need to access some branch drains 6 vertical drainage pipe 2 or horizontal drain pipe 4, easy for installation fast Victory, alignment error is small, and precision is high.
Above example only not limits technical scheme described in the invention to illustrate the present invention, although this explanation Book is with reference to each above-mentioned embodiment to present invention has been detailed description, but the present invention is not limited to above-mentioned specific implementation Mode, therefore any the present invention is modified or equivalent substitution;And the technical side of all spirit and scope for not departing from invention Case and its improvement, it all should cover among scope of the presently claimed invention.

Claims (7)

1. a kind of voltage regulation type drainage arrangement, it is characterised in that including trap (1), the trap (1) passes through vertical drainage pipe (2) it is connected with floor drain (3), the trap is connected by horizontal drain pipe (4) with soil stack (5), described vertical It is connected with drainpipe (2) and the horizontal drain pipe (4) on some branch drains (6), the trap (1) and is additionally provided with ventilation Mouth (7), the blow vent (7) is connected by vent branch (8) with vent stack (9).
2. a kind of voltage regulation type drainage arrangement as claimed in claim 1, it is characterised in that the vent stack (9) and the row Water standpipe (5) is attached by the connecting pipe (11) being obliquely installed.
3. a kind of voltage regulation type drainage arrangement as claimed in claim 1, it is characterised in that the quantity of the trap (1) is 1-3 It is individual, it is connected in series between each trap (1).
4. a kind of voltage regulation type drainage arrangement as described in claim 1-3 is any, it is characterised in that the trap (1) is S types Structure.
5. a kind of voltage regulation type drainage arrangement as described in claim 1-3 is any, it is characterised in that the trap (1) is p-type Structure.
6. a kind of voltage regulation type drainage arrangement as described in claim 1-3 is any, it is characterised in that on the trap (1) also Provided with access hole (10).
7. a kind of construction method of voltage regulation type drainage arrangement, it is characterised in that including one kind as described in claim 1-6 is any Voltage regulation type drainage arrangement, its construction method comprises the following steps:
Step one:Major structure of construction is constructed, after form work engineering completion, and bottom layer of the reinforcing steel carries out unwrapping wire before laying, to toilet and Trap (1), vent stack (9), soil stack (5), vertical drainage pipe (2), horizontal drain pipe (4) and some rows in pipe well Water branch pipe (6) is positioned, reserving hole or pipe fitting;
Step 2:Reinforcement engineering construction, after reinforcement engineering construction is finished, recycles the materials such as screw rod, reinforcing bar to related reservation member Fixation is attached, and is nursed in concreting process, it is ensured that reserving hole or pipe fitting accurate and effective;
Step 3:Water supply and sewage work are installed, and some branch drains (6) are accessed into vertical drainage pipe (2) or horizontal drain pipe (4)。
Step 4:Blow vent (7) on the water curved (1) is connected by vent branch (8) with vent stack (9), completed The construction and installation of voltage regulation type drainage arrangement.
CN201710554877.9A 2017-07-07 2017-07-07 A kind of voltage regulation type drainage arrangement and construction method Pending CN107268731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710554877.9A CN107268731A (en) 2017-07-07 2017-07-07 A kind of voltage regulation type drainage arrangement and construction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710554877.9A CN107268731A (en) 2017-07-07 2017-07-07 A kind of voltage regulation type drainage arrangement and construction method

Publications (1)

Publication Number Publication Date
CN107268731A true CN107268731A (en) 2017-10-20

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Country Status (1)

Country Link
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109208744A (en) * 2018-11-13 2019-01-15 浙江老铁匠实业有限公司 Drainage arrangement for toilet
CN111236407A (en) * 2020-01-16 2020-06-05 中铁二局集团有限公司 Drainage device and method for floor accumulated water in super high-rise building construction
CN112095744A (en) * 2019-12-05 2020-12-18 怀化沃普环保科技有限公司 Anti-blocking sink pipe for sewer with reserved inspection hole
CN112240050A (en) * 2019-07-19 2021-01-19 株式会社普利司通 Drainage structure
CN112663740A (en) * 2021-01-14 2021-04-16 成都易见密尔商贸有限公司 Trap water volume is from replenishing device
CN112982617A (en) * 2021-02-05 2021-06-18 江西中烟工业有限责任公司 Device capable of exhausting air in one direction and preventing bromine gas from returning to drainage pipeline
CN114775755A (en) * 2022-04-29 2022-07-22 张书廷 Toilet excrement discharging and conveying method and device
TWI834921B (en) * 2019-12-13 2024-03-11 日商普利司通股份有限公司 Drainage pipe structure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56125459U (en) * 1980-02-20 1981-09-24
CN101899855A (en) * 2010-07-30 2010-12-01 张超 Combined drainage device
CN203346963U (en) * 2013-07-12 2013-12-18 徐水县兴华铸造有限公司 Rotational flow double-vertical pipe water discharge system
CN204849958U (en) * 2015-07-03 2015-12-09 北京同福全家工程技术有限公司 Deodorant trap
CN106193215A (en) * 2016-07-12 2016-12-07 江苏玖森市政园林建设有限公司 Drainage system and construction method of installation thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56125459U (en) * 1980-02-20 1981-09-24
CN101899855A (en) * 2010-07-30 2010-12-01 张超 Combined drainage device
CN203346963U (en) * 2013-07-12 2013-12-18 徐水县兴华铸造有限公司 Rotational flow double-vertical pipe water discharge system
CN204849958U (en) * 2015-07-03 2015-12-09 北京同福全家工程技术有限公司 Deodorant trap
CN106193215A (en) * 2016-07-12 2016-12-07 江苏玖森市政园林建设有限公司 Drainage system and construction method of installation thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王凤宝: "《建筑给水排水与暖通施工图设计正误案例对比》", 31 August 2016, 华中科技大学出版社 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109208744A (en) * 2018-11-13 2019-01-15 浙江老铁匠实业有限公司 Drainage arrangement for toilet
CN112240050A (en) * 2019-07-19 2021-01-19 株式会社普利司通 Drainage structure
CN112095744A (en) * 2019-12-05 2020-12-18 怀化沃普环保科技有限公司 Anti-blocking sink pipe for sewer with reserved inspection hole
TWI834921B (en) * 2019-12-13 2024-03-11 日商普利司通股份有限公司 Drainage pipe structure
CN111236407A (en) * 2020-01-16 2020-06-05 中铁二局集团有限公司 Drainage device and method for floor accumulated water in super high-rise building construction
CN112663740A (en) * 2021-01-14 2021-04-16 成都易见密尔商贸有限公司 Trap water volume is from replenishing device
CN112982617A (en) * 2021-02-05 2021-06-18 江西中烟工业有限责任公司 Device capable of exhausting air in one direction and preventing bromine gas from returning to drainage pipeline
CN114775755A (en) * 2022-04-29 2022-07-22 张书廷 Toilet excrement discharging and conveying method and device

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Address after: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 16

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Application publication date: 20171020