CN202484367U

CN202484367U - Novel drainage check valve

Info

Publication number: CN202484367U
Application number: CN2012200648330U
Authority: CN
Inventors: 吴春娟; 缪志清; 赵磊
Original assignee: WUXI fur METAL PRODUCT CO Ltd
Current assignee: WUXI fur METAL PRODUCT CO Ltd
Priority date: 2012-02-27
Filing date: 2012-02-27
Publication date: 2012-10-10
Anticipated expiration: 2022-02-27

Abstract

The utility model provides a novel drainage check valve. The novel drainage check valve can be applied to cleaning of primary sewage and rainwater with urban garbage, solves the problem of back flowing of the sewage and the rainwater, cuts off a route of contamination and pathogen transmission, and is simple in installation and safe and reliable in use. The novel drainage check valve comprises a valve body and a bonnet, and is characterized in that the valve body and the bonnet are connected through a nestled rotating shaft, a cavity is arranged in the middle of the bonnet body, and sands are poured into the cavity.

Description

A kind of novel drainage check valve

Technical field

The utility model relates to the municipal drainage processing technology field, particularly solves the device that water pours in down a chimney in the draining processing procedure, is specially a kind of novel drainage check valve.

Background technique

In recent years, receive the influence of global extreme weather, a lot of regional floods of China and waterlogging the condition of a disaster take place frequently; The Wuxi that is located in the middle and lower reach of Yangtze River, original rainwater is just abundant, receives the invasion of extreme weather again; Cause the frequent appearance in many places draining in time, even rainwater pours in down a chimney phenomenon.Existing adopt pumping drainage usually, but pumping plant that density is set is limited, can not cover all ponding zones; So some regional rainwater pour in down a chimney phenomenon and still are difficult to thorough solution at present, particularly low-lying area, blowdown and rainwater are collected and are shared in the inspection shaft; Whenever rainy season or heavy rain arriving; Water level in the inspection shaft sharply rises, and flows backwards as for sewage and can't in time discharge to pipe network inside, and backing up of sewage is got back to the collection seedbed; Back the rainwater of road surface and lowered zones this moment and just taken back the filthy and various bacteriums that in sewage network, gather at ordinary times, bring the deuce to pay and puzzlement for people's production and life.

Several years ago domestic bringing into use " duck-beak type flexible water drainage valve "; This device is generally to containing the elementary sewage of municipal wastes such as branch, leaf, waste or used plastics and the cleaning of rainwater; But because deposition such as silt can cause valve open pressure big even can't open; Perhaps owing to deposition in valve such as waste plastic bag causes valve to close; Simultaneously it safeguards (mediation) also difficulty very, and therefore, this device relatively is applicable to through the urban sewage second level of filtering and processing procedures such as purification afterwards.

Summary of the invention

To above-mentioned situation; The utility model provides a kind of novel drainage check valve, can be applicable to the elementary sewage that has municipal waste and the cleaning of rainwater, solves sewage, rainwater pours in down a chimney problem; Cut off a pollution and bacteria-travelling approach, and simple installation is safe and reliable.

Its technological scheme is such: it comprises valve body, valve gap, it is characterized in that: said valve body and valve gap link together through embedded rotating shaft, are cavity in the middle of the said valve gap body, and in said cavity, irritating has sand.

It is further characterized in that: outer rim one side at said valve gap body is provided with a convexity, has through hole in the said convexity, and rotating shaft runs through said through hole; Said valve body comprises hollow tubular; One end of said hollow tubular body is a flange edge, and said flange edge body one side is provided with boss, and a side is provided with flange on said boss; Said flange inner has rectangular recess, has pilot hole on said rectangular recess two sidewalls in opposite directions; Said convexity is flush-mounted in the said rectangular recess and through said rotating shaft and connects, and is between said rotating shaft and said through hole, the said pilot hole to be slidingly matched; Said this body section of valve gap is a fusiformis, and the Zhou Jing in said fusiformis cross section is greater than the internal diameter of the flange edge convex platform of said valve body; Hollow tubular periphery at said valve body is with general seal ring; On said flange edge, be uniformly distributed with bolt hole;

Its further characteristic also is: said valve body and valve gap all adopt modified hard polyvinyl chloride (PVC-U) to be material; The external diameter of the hollow pipeline section of said valve body and the internal diameter of drainage pipe are complementary.

Use the utility model as preventing sewage, rainwater flowing backward device in the draining processing, its beneficial effect is:

One, can be applicable to the elementary sewage that has municipal waste and the cleaning of rainwater; The utility model valve body is connected through embedded rotating shaft with valve gap; Make valve gap not only can rotate along rotating shaft freedom and flexibility ground; And after rotating shaft runs through the through hole on the valve gap convexity, be inlaid in the pilot hole of the rectangular recess that is positioned at valve flange limit flange in the lump with the convexity of valve gap, like this; When guaranteeing that valve gap rotates freely, can also avoid in elementary sewage or the rainwater impurity to corrode and produce stuck and corrosion phenomenon;

Two, solution sewage, rainwater pour in down a chimney problem; Cutting off a pollution and bacteria-travelling approach, is cavity in the middle of the utility model valve gap body, pours into sand in the cavity; Like this; Make that the deadweight of valve gap itself is bigger, and when the valve gap opening and closing its center of gravity can be with cavity in flowing of sand change, valve gap can rely on the effect of Shift of Focus to automatically reply fully; Through meticulously calculating, between the protruding end and valve gap end of outer rim one side of valve gap body, be fulcrum with the axle center of rotating shaft; Formed lever principle, therefore, the utility model has utilized center of gravity to change working principle well and lever principle combines; On the one hand, valve gap automatically replies according to action of gravity and continues the state of keeping shut after draining is accomplished, on the other hand; The big I that valve gap is opened is with the change in pressure of the size formation of draining in-pipe flow, and valve gap possesses very low cracking pressure is arranged; When peripheral water level is higher than this water level, from the reciprocal pressure of valve gap opening direction pressure greater than the valve gap opening direction, valve gap can not be opened and cover tightly outside the valve flange limit, so just can prevent well that sewage, rainwater from pouring in down a chimney; And, can also avoid floating refuses such as branch, plastic bag to block the normal use of valve gap influence simultaneously because the Zhou Jing in the fusiformis cross section of valve gap makes valve gap to open towards the lateral direction (unidirectional) of valve body greater than the internal diameter of the flange edge convex platform of valve body;

Three, simple installation is safe and reliable; Seal ring was placed in the hollow pipeline section periphery of valve body when the utility model was installed; Again hollow pipeline section is directly pushed the draining mouth of pipe; Because the external diameter of valve body hollow tubular and the internal diameter of waste pipe are complementary, so under the elastic packing mating reaction of general seal ring, drainage check valve can be fixed on the draining mouth of pipe well; Be evenly equipped with bolt hole on the flange edge, can be fixed together with the draining mouth of pipe or inspection shaft inwall, further strengthened the stable installation property of drainage check valve through the bolt flange limit; The valve body of the utility model drainage check valve, valve gap all adopt modified hard polyvinyl chloride (PVC-U) to be material; Make drainage check valve have corrosion-resistant, shock resistance, non-leakage, avirulent, in light weight, characteristics that the life-span is long; Do not expose and make the utility model in long-term wet environment, use to be difficult for oxidation and rusting, durable yet and there is metal parts.

Description of drawings

Fig. 1 is the utility model drainage check valve plan view;

Fig. 2 is the right elevation of Fig. 1.

Embodiment

See Fig. 1, Fig. 2, the utility model comprises valve body 1, valve gap 2, and valve body 1 is one section hollow tubular; One end of hollow tubular body is provided with flange edge 3, and the flange edge body comprises boss 4, and the side on the boss 4 of flange edge 3 is provided with flange 6; Flange 6 inboards are provided with rectangular recess 7, on two sidewalls 11 in opposite directions of rectangular recess 7, pilot hole (not expressing pilot hole among the figure) are set, and are provided with one protruding 8 in outer rim one side of valve gap 2 bodies; Open hole (not expressing through hole among the figure) in protruding 8; Rotating shaft 9 runs through the through hole in protruding 8, and in convexity 8 was inlaid in the rectangular recess 7 of flange 6 inboards, rotating shaft 9 was with through hole, pilot hole and is slidingly matched; In the middle of valve gap 2 bodies is cavity 5, and in cavity 5, irritating has sand; 2 body sections of valve gap are fusiformis, and the Zhou Jing in fusiformis cross section is greater than the internal diameter of flange edge 3 convex platforms 4 of valve body 1; Hollow pipeline section outer race at valve body 1 has general seal ring (not expressing seal ring among the figure); The external diameter of valve body 1 and drainage pipe internal diameter are complementary; Need only the outlet port that valve body 1 is pushed waste pipe during installation, utilize the elastic packing effect of seal ring that valve body 1 is fixed on the inwall of drainage pipe (not expressing drainage pipe among the figure); Be uniformly distributed with bolt hole 10 on the flange edge 3,, further guarantee the fixing of valve body 1 so also can flange edge be fixed on draining mouth of pipe place or the inspection shaft wall through bolt; Valve body 1 all adopts modified hard polyvinyl chloride (PVC-U) to be material with valve gap 2; Utilize the rotational moulding technology; No weld seam once-through; For being adapted to the market demand, drainage check valve can have four kinds of models to be respectively 225,300,400,500 at least, and the concrete size of valve body that it is corresponding and flange edge is following:

Product type	Mouth of pipe external diameter (mm)	Footpath (mm) in the flange	Flange internal diameter (mm)	Spout diameter (mm)
					225	220	275	230	185
300	295	350	310	260
					400	395	450	410	360
500	495	550	510	460

Four kinds of models of the utility model all meet plastic tube standard (using the polyethylene structure pipe-line system) GBT-19472:2004 China engineering construction standard standard C ECS164:2004 with polythene drainpipe pipework technical regulations with burying with burying; Serviceability temperature reaches-20 ℃--and 60 ℃, therefore safe and reliable.

Claims

1. a kind of novel drainage check valve, it comprises valve body, valve gap, it is characterized in that: said valve body and valve gap link together through embedded rotating shaft, be cavity in the middle of the said valve gap body, and filling has sand in said cavity.

2. a kind of novel drainage check valve according to claim 1, it is characterized in that: outer rim one side at said valve gap body is provided with a convexity, has through hole in the said convexity, and rotating shaft runs through said through hole.

3. a kind of novel drainage check valve according to claim 2; It is characterized in that: said valve body comprises hollow tubular; One end of said hollow tubular body is a flange edge, and said flange edge body one side is provided with boss, and a side is provided with flange on said boss; Said flange inner has rectangular recess, has pilot hole on said rectangular recess two sidewalls in opposite directions.

4. a kind of novel drainage check valve according to claim 3; It is characterized in that: said convexity is flush-mounted in the said rectangular recess and through said rotating shaft and connects, and is between said rotating shaft and said through hole, the said pilot hole to be slidingly matched.

5. a kind of novel drainage check valve according to claim 1, it is characterized in that: said this body section of valve gap is a fusiformis, the Zhou Jing in said fusiformis cross section is greater than the internal diameter of the flange edge convex platform of said valve body.

6. a kind of novel drainage check valve according to claim 1, it is characterized in that: the hollow tubular periphery at said valve body is with general seal ring.

7. a kind of novel drainage check valve according to claim 3 is characterized in that: on said flange edge, be uniformly distributed with bolt hole.

8. a kind of novel drainage check valve according to claim 1, it is characterized in that: it is material that said valve body and valve gap all adopt modified hard polyvinyl chloride.

9. a kind of novel drainage check valve according to claim 1, it is characterized in that: the external diameter of the hollow pipeline section of said valve body and the internal diameter of drainage pipe are complementary.