CN201344291Y

CN201344291Y - Three-in-one reverse flow preventer

Info

Publication number: CN201344291Y
Application number: CNU2009200373834U
Authority: CN
Inventors: 姜全德
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-23
Filing date: 2009-01-23
Publication date: 2009-11-11
Anticipated expiration: 2019-01-23

Abstract

The utility model discloses a three-in-one reverse flow preventer, which comprises a shell, a check valve, a filter plate and a sewage drain pipe. The three-in-one reverse flow preventer can totally intercept foreign matters possibly carried by upstream water while guaranteeing the forward flowing of pressure water in a pipeline, and can dispose sewage generated by the construction and maintenance of upstream water supply pipeline facilities, avoids sewage contaminating pipe networks and users in a water supply region. As the reverse flow preventer has smaller water head loss, and integrates the backflow prevention, filter and sewage drainage, the backflow preventer can save space and reduce cost during the construction of water supply pipelines, and make the construction of water supply pipelines more standard.

Description

Three-in-one backflow preventer

Technical field

The utility model relates to a kind of pipeline backflow preventer, especially a kind of backflow preventer that has filtration and dirt eliminating function concurrently.

Background technique

For guaranteeing the safe and sanitary in the tap water supply, stipulated on relevant water supply line, to answer pipe laying backflow preventer or other effectively to prevent the device that flows backwards and pollute among the standard GB 50015-2003 " Code for design of building water supply and sewerage ".At present, the backflow preventer on the China market no doubt can prevent effectively that ducted medium from flowing backwards, but loss of head is bigger, must strengthen pressure of supply water during use, makes that the water supply energy consumption increases, the water supply cost height, thereby can not get generally promoting.

Summary of the invention

In order to overcome above-mentioned defective, the utility model provides a kind of three-in-one backflow preventer, and this three-in-one backflow preventer will prevent that refluence, filtration and three kinds of functions of blowdown are integrated.

The utility model for the technological scheme that solves its technical problem and adopt is:

A kind of three-in-one backflow preventer so that the time spent water (flow) direction is a benchmark, comprises a hollow housing, and the housing two ends are respectively water intake and water outlet, and the enclosure interior between entery and delivery port is divided into valve pocket and filtering cavity, and filtering cavity is positioned at the valve pocket upstream;

Be provided with mount inlet (being used for safety check is packed in the valve pocket) with the corresponding housing of valve pocket, having at least two safety check series connection to be fixed in the valve pocket (has at least two safety check to improve safety coefficient, if there is a safety check fault malfunctioning, can guarantee that still tap water can not flow backwards in the pipeline), mount inlet is provided with the valve pocket cover plate, and valve pocket cover plate for sealing mount inlet, water inlet is in the housing, water inlet place of a safety check of upstream sealing is communicated with water inlet in the safety check, water inlet communicates towards filtering cavity and with filtering cavity, the water inlet internal diameter is less than the filtering cavity internal diameter, for being tightly connected, be between the water outlet place circumferential edges of a safety check in downstream and inner walls in the safety check sealing (be current can't flow backwards into valve pocket) between water inlet outer wall and inner walls;

Be provided with gathering hole with the corresponding housing of filtering cavity, gathering hole is provided with the filter chamber cover plate, the salable gathering hole of this filter chamber cover plate, and this filter chamber cover plate is detachable, and the filter chamber cover plate is provided with perforate, and sealing is equipped with drain pipe in the perforate, drain pipe one end is towards filtering cavity, the drain pipe the other end is provided with filter plate towards the outside in the filtering cavity, and filter plate is positioned at the water inlet upstream;

Be provided with plug, plug can be blocked described water inlet and drain pipe one end.

Further technological scheme of the present utility model is:

Described filter plate is than the more approaching described water inlet of described drain pipe.When filter plate than drain pipe during more near water inlet, be positioned in the filtering cavity filter plate upstream the space bigger, provide storage space with regard to foreign matter in the water of holding back to filter plate like this, and when blowdown, filter plate can be used as the backrest of water inlet upper plug head, filter plate can directly or by stemming be against plug on the water inlet, make the water inlet of blocking that plug can be more firm, be not easy to fall down from water inlet, described filter plate can be dismountable, also can be non-removable, because no matter filter plate can be non-dismountable, sewage can not pass through filter plate when blowdown, and the dismountable purpose of filter plate is both to be convenient to the cleaning and the replacing of filter plate, is convenient to water inlet again plug is installed.When this three-in-one backflow preventer is used for draining-off sewage, can open the filter chamber cover plate, take off capping and plug on the drain pipe, with the water inlet in filtering cavity downstream with plug stifled on, build the filter chamber cover plate again, promptly enter the blowdown state.

Described filter plate is detachable.

Described drain pipe is than the more approaching described water inlet of described filter plate.When drain pipe during than the more approaching described water inlet of described filter plate, filter plate is detachable, and dismountable purpose is, when blowdown filter plate is removed, and makes sewage directly get rid of after water intake flows to drain pipe without filter plate.When this three-in-one backflow preventer is used for draining-off sewage, can open the filter chamber cover plate, filter plate is removed, take off capping and plug on the drain pipe, with the water inlet in filtering cavity downstream with plug stifled on, build the filter chamber cover plate again, promptly enter the blowdown state.

Described safety check has two.

The drain pipe the other end detachably is fixed with a capping.

The diameter of described water inlet is greater than the diameter of described drain pipe one end, and drain pipe one end is provided with outside thread, described plug is provided with one, the axial inwall of plug is provided with internal thread, the outside thread of the internal thread of plug and drain pipe one end is complementary, the axial outer wall of plug is provided with a circle blocking radially, and blocking can be blocked water inlet.

So that the time spent water (flow) direction is a benchmark, described water intake is the flaring type, and described water outlet is a gradual shrinkage.Make tap water little like this, reduced loss of head at the inner more ducted flow velocity of flow velocity of this example.

The beneficial effects of the utility model are: this three-in-one backflow preventer is when guaranteeing that ducted press water forward flows, the foreign matter that upland water may carry all can also be held back, and can be with upstream water supply line facility because of construction, the sewage that maintenance produces is got rid of, avoid pipe network and user in the sewage pollution contributing region, again and this routine loss of head very little, again because this example collection prevents refluence, filtration and three kinds of functions of blowdown are one, therefore in the construction construction of water supply line, can save the space, reduce cost, make the construction of the feedwater piping more standard of constructing.

Description of drawings

Fig. 1 is the utility model normal water supply view;

Fig. 2 is the utility model blowdown view.

Embodiment

Embodiment: a kind of three-in-one backflow preventer, so that the time spent water (flow) direction is a benchmark, comprise a hollow housing 1, the housing two ends are respectively water intake 2 and water outlet 3, enclosure interior between entery and delivery port is divided into valve pocket 4 and filtering cavity 5, and filtering cavity is positioned at the valve pocket upstream;

Be provided with mount inlet (being used for safety check is packed in the valve pocket) with the corresponding housing of valve pocket, having at least 6 series connection of two safety check to be fixed in the valve pocket (has at least two safety check to improve safety coefficient, if there is a safety check fault malfunctioning, can guarantee that still tap water can not flow backwards in the pipeline), mount inlet is provided with valve pocket cover plate 7, and valve pocket cover plate for sealing mount inlet, water inlet 8 is in the housing 1, water inlet place of a safety check of upstream sealing is communicated with water inlet 8 in the safety check, water inlet 8 communicates towards filtering cavity and with filtering cavity, water inlet 8 internal diameters are less than the filtering cavity internal diameter, for being tightly connected, be between the water outlet place circumferential edges of a safety check in downstream and inner walls in the safety check sealing (be current can't flow backwards into valve pocket) between water inlet outer wall and inner walls;

Be provided with gathering hole with the corresponding housing of filtering cavity, gathering hole is provided with filter chamber cover plate 9, the salable gathering hole of this filter chamber cover plate, and this filter chamber cover plate is detachable, and the filter chamber cover plate is provided with perforate, and sealing is equipped with drain pipe 10 in the perforate, drain pipe one end is towards filtering cavity, the drain pipe the other end is provided with filter plate 11 towards the outside in the filtering cavity, and filter plate is positioned at the water inlet upstream;

Be provided with plug 12, plug can be blocked described water inlet and drain pipe one end.

Described filter plate is detachable.

Described safety check 6 has two.

The described drain pipe the other end detachably is fixed with a capping 13.

This routine user mode is as follows:

Normal water supply state: filter chamber cover plate for sealing gathering hole, plug is blocked drain pipe one end, the drain pipe the other end is sealed in capping, and water inlet communicates with filtering cavity, and tap water enters this example by water intake, through the filter plate in the filtering cavity, just in case foreign matter is arranged, promptly held back by filter plate in the water, tap water enters each safety check in the valve pocket successively by water inlet again, tap water is opened the flap of each safety check by the pressure of self, and then flows out water supply by water outlet from this example.Owing to be provided with filter plate, just in case there is foreign matter promptly to be held back by filter plate, foreign matter can not be stuck in the normal operation that influences safety check in the flap of safety check in the water, has improved the operating safety factor of safety check, has prolonged the working life of safety check.

Supply water and to stop or pressure reduces in the upstream: when the downstream pressure of each safety check 〉=upstream pressure, safety check cuts out flap by the strength of self spring, and seal degree is directly proportional with the upper and lower trip pressure difference of safety check; When the upper and lower trip pressure of safety check all located zero, flap was closed too.

Blowdown state: may be because upstream water supply line facility is constructed, maintenance can produce sewage, if the structure that this moment, this three-in-one backflow preventer adopted is that filter plate is than drain pipe during more near water inlet, can open the filter chamber cover plate, take off capping and plug on the drain pipe, the water inlet in filtering cavity downstream is blocked up with plug, build the filter chamber cover plate again, promptly enter the blowdown state; If the structure that this three-in-one backflow preventer adopts be drain pipe than filter plate more near water inlet, and when filter plate is detachable, can open the filter chamber cover plate, filter plate is removed, take off capping and plug on the drain pipe, the water inlet in filtering cavity downstream is blocked up with plug, build the filter chamber cover plate again, promptly enter the blowdown state.Sewage is entered by this routine water intake, without filter plate, directly flows to drain pipe by water intake, by drain pipe sewage is got rid of, and avoids pipe network and user in the sewage pollution contributing region.

Equipment operation should be opened the foreign matter that inspection of filter chamber cover plate and cleaning filter plate are held back after a period of time in good time; After finishing, blowdown, inspection or cleaning filter plate answer instant recovery to the normal water supply state.

Claims

1, a kind of three-in-one backflow preventer, it is characterized in that: so that the time spent water (flow) direction is a benchmark, comprise a hollow housing (1), the housing two ends are respectively water intake (2) and water outlet (3), enclosure interior between entery and delivery port is divided into valve pocket (4) and filtering cavity (5), and filtering cavity is positioned at the valve pocket upstream;

Be provided with mount inlet with the corresponding housing of valve pocket, have at least two safety check (6) series connection to be fixed in the valve pocket, mount inlet is provided with valve pocket cover plate (7), and valve pocket cover plate for sealing mount inlet, water inlet (8) is in the housing (1), water inlet place of a safety check of upstream sealing is communicated with water inlet (8) in the safety check, water inlet (8) communicates towards filtering cavity and with filtering cavity, water inlet (8) internal diameter is less than the filtering cavity internal diameter, for being tightly connected, be sealing between the water outlet place circumferential edges of a safety check in downstream and inner walls in the safety check between water inlet outer wall and inner walls;

Be provided with gathering hole with the corresponding housing of filtering cavity, gathering hole is provided with filter chamber cover plate (9), the salable gathering hole of this filter chamber cover plate, and this filter chamber cover plate is detachable, and the filter chamber cover plate is provided with perforate, and sealing is equipped with drain pipe (10) in the perforate, drain pipe one end is towards filtering cavity, the drain pipe the other end be provided with filter plate (11) in the filtering cavity, and filter plate is positioned at the water inlet upstream towards the outside;

Be provided with plug (12), plug can be blocked described water inlet and drain pipe one end.

2, a kind of three-in-one backflow preventer according to claim 1 is characterized in that: described filter plate is than the more approaching described water inlet of described drain pipe.

3, a kind of three-in-one backflow preventer according to claim 1, it is characterized in that: described filter plate is detachable.

4, a kind of three-in-one backflow preventer according to claim 3 is characterized in that: described drain pipe is than the more approaching described water inlet of described filter plate.

5, a kind of three-in-one backflow preventer according to claim 1 is characterized in that: described safety check (6) has two.

6, a kind of three-in-one backflow preventer according to claim 1 is characterized in that: the described drain pipe the other end detachably is fixed with a capping (13).

7, a kind of three-in-one backflow preventer according to claim 1, it is characterized in that: the diameter of described water inlet is greater than the diameter of described drain pipe one end, and drain pipe one end is provided with outside thread, described plug is provided with one, the axial inwall of plug is provided with internal thread, the outside thread of the internal thread of plug and drain pipe one end is complementary, and the axial outer wall of plug is provided with a circle blocking radially, and blocking can be blocked water inlet.

8, a kind of three-in-one backflow preventer according to claim 1 is characterized in that: so that the time spent water (flow) direction is a benchmark, described water intake is the flaring type, and described water outlet is a gradual shrinkage.