CN202036867U - Secondary rainwater filtering device - Google Patents

Abstract

The utility model discloses a secondary filter device for rainwater. The filter device includes a filter part and a retention part. The filter part includes an outer shell and an annular filter tube; the top of the outer shell is provided with a water inlet, and the bottom is provided with a water outlet. The side wall at the bottom of the outer casing is provided with a filtered water outlet; the top and bottom of the annular filter tube are matched and mounted on the top and bottom of the outer casing, and the water inlet and outlet of the outer casing are facing the nozzle of the annular filter tube , the nozzle diameter of the annular filter tube is larger than the water inlet diameter and the water outlet diameter of the outer shell, and smaller than the diameter of the outer shell; The groove body structure matched with the outer casing, and the bottom of the groove body is provided with a sewage outlet. The utility model is mainly used for filtering and collecting rainwater. The utility model has the advantages of simple structure, convenient installation and good quality of outflow water, and is suitable for roof rainwater discharge pipeline systems in the field of building water supply and drainage.

Description

A rainwater secondary filter device

technical field

The utility model relates to a filtering device, in particular to a rainwater secondary filtering device.

Background technique

China is one of the 13 countries in the world that are seriously short of water. With the rapid development of the national economy, the rapid growth of population and the improvement of people's living standards, industrial and urban domestic water use has increased significantly, and water resources have become increasingly tense. Only 0.28% of the fresh water resources on the earth can be used as domestic water, agricultural water and industrial water to meet human needs. Due to the uneven distribution of water resources in time and space, coupled with the irrational development and utilization of water resources and the serious waste of human beings, as well as the aggravation of water pollution in the process of urbanization and industrialization, etc., the contradiction of water use has become more and more prominent.

Recently, people have paid more and more attention to the utilization of rainwater in natural water resources. The extensive utilization of rainwater resources is an effective measure to save water, reduce urban flood disasters, relieve the burden on drainage pipes, reduce pollution load, and improve the water environment. At present, the collection and utilization of rainwater is becoming more and more popular at home and abroad. After a certain filtration, the rainwater can be used as reclaimed water, and it can even meet the standard of drinking water. Since the water collection surface for collecting rainwater is basically open-air, various reasons will cause the rainwater to be polluted to varying degrees. The direct use of this kind of water is not safe and will also have adverse effects on the environment. Therefore, proper filtration device, it is necessary to filter the collected rainwater.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings existing in the prior art, and provide a rainwater secondary filter device, which solves the problems existing in the existing rainwater recovery process, such as pollution, large amount of discarded water, and complex structure of the filter equipment wait.

In order to achieve the above object, the utility model adopts the following technical solutions:

A rainwater secondary filter device, comprising a filter part and a stagnation part, the filter part includes an outer shell and an annular filter tube; the top of the outer shell is provided with a water inlet, the bottom is provided with a water outlet, and the side of the bottom of the outer shell is The wall is provided with a filtered water outlet; the top and bottom of the ring-shaped filter tube are matched with the top and bottom of the outer shell, and the water inlet and outlet of the outer shell are facing the mouth of the ring-shaped filter tube. The nozzle diameter of the annular filter pipe is larger than the water inlet diameter and the water outlet diameter of the outer casing, and smaller than the diameter of the outer casing.

The stagnation part is arranged under the outer casing of the filter part, and is a groove body structure matched with the outer casing of the filter part, and the bottom of the groove body is provided with a sewage outlet.

Further, a control valve is provided at the sewage outlet provided at the bottom of the stagnation part.

Further, the annular filter tube includes an inner filter net, an outer filter net and filter material, and the filter material is arranged between the inner filter net and the outer filter net. The inner filter screen should be determined according to the size of the impurity particles contained in the filtered rainwater. The outer filter screen mainly plays the role of guiding water and fixing the filter material, and the size of its mesh should be selected according to the particle size of the filled filter material. The filter material is various water purification materials, and the filter material is one or a mixture of two or more of ceramsite, quartz sand, and fiber balls.

Further, a reinforcing rib sheet for connecting the inner and outer filter screens is provided between the inner and outer filter screens, so as to combine the inner filter screen, the outer layer filter screen and the filter material into an annular filter tube, And strengthen the integral rigidity of this annular filter pipe.

When the rain starts, the rainwater containing leaves and dust particles flows into the annular filter tube through the water inlet provided on the top of the outer casing of the filter part. Under the action of gravity, the rainwater passes through the inner filter of the annular filter tube for the first First filtration, and then through the filter material for the second filtration to purify the rainwater, the filtered rainwater flows into a water storage tank through the filtered water outlet set on the bottom side wall of the shell body, while impurities such as leaves and dust particles Then sink into the stagnant part; when impurities such as leaves and dust particles accumulate to a certain extent, open the control valve set at the sewage outlet at the bottom of the stagnant part, discharge it and then close the valve, and continue to filter through the annular filter tube rainwater.

The utility model is mainly used for rainwater collection, and has a simple structure, convenient installation and good quality of outflow water, and is suitable for a roof rainwater discharge pipeline system in the field of building water supply and drainage.

Description of drawings

Fig. 1 is a schematic diagram of the front view of the utility model.

FIG. 2 is a schematic diagram of the cross-sectional structure along line A-A of FIG. 1 .

Detailed ways

The specific embodiment of the utility model is described below in conjunction with accompanying drawing.

Example 1:

As shown in Figures 1 and 2, a rainwater secondary filter device includes a filter part 1 and a stagnation part 2, and the filter part 1 includes an outer shell 11 and an annular filter pipe 12; the top of the outer shell is provided with There is a water inlet 111, a water outlet 112 is provided at the bottom, and a filtered water outlet 113 is provided on the side wall at the bottom of the outer casing 11; and the bottom, and the water inlet 111 and the water outlet 112 of the outer casing 11 are facing the annular filter pipe mouth, and the diameter of the annular filter pipe 12 is larger than the water inlet 111 diameter and the water outlet 112 diameter of the outer casing 11, And smaller than the diameter of the outer casing 11 .

The annular filter pipe 12 includes an inner layer filter screen 121, an outer layer filter screen 122 and a filter material 123, and the filter material 123 is ceramsite, and is arranged between the inner and outer layer filter screens 121, 122; A rib 124 for connecting the inner and outer filter nets 121 and 122 is provided between the outer filter nets 121 and 122 .

The stagnation part 2 is arranged below the outer casing 11 of the filtering part, and is a groove body structure matched with the outer casing 11 of the filtering part. The bottom of the groove body is provided with a sewage outlet 21, and the sewage outlet 21 is provided with a control valve. twenty two.

Example 2:

The difference between this embodiment and Embodiment 1 is that the filter material 123 is quartz sand.

Example 3:

The difference between this embodiment and embodiment 1 or 2 is that the filter material 123 is a mixture of ceramsite, quartz sand and fiber balls.

To sum up, the embodiment described in this utility model only provides a kind of optimal implementation mode, and the technical content and technical characteristics of this utility model have been disclosed as above, but those who are familiar with this technology may still be based on this utility model. According to the disclosed content, various replacements and modifications are made without departing from the creative spirit of the present invention; The equivalent changes are all covered within the protection scope of the present utility model.

Claims (5)

1. A rainwater secondary filter device, characterized in that: the filter device includes a filter part (1) and a retention part (2), and the filter part (1) includes an outer casing (11) and an annular filter pipe (12); the top of the outer casing (11) is provided with a water inlet (111), the bottom is provided with a water outlet (112), and the side wall of the bottom of the outer casing (11) is provided with a filtered water outlet (113); The top and bottom of the ring-shaped filter pipe (12) are matched with the top and bottom of the outer casing (11), and the water inlet (111) and water outlet (112) of the outer casing (11) are facing the ring-shaped filter pipe (12) nozzle, the diameter of the nozzle of the annular filter pipe (12) is greater than the diameter of the water inlet (111) and the diameter of the water outlet (112) of the outer casing (11), and smaller than the diameter of the outer casing (11) )diameter of; The stagnation part (2) is arranged under the outer casing (11) of the filtering part (1), and is a groove body structure matched with the outer casing (11) of the filtering part (1), and the bottom of the groove body is provided with Sewage outlet (21). 2. A rainwater secondary filter device according to claim 1, characterized in that: a control valve (22) is provided at the sewage outlet (21) provided at the bottom of the retention part (2). 3. A kind of rainwater secondary filter device according to claim 1 or 2, characterized in that: the annular filter pipe (12) comprises an inner layer filter screen (121), an outer layer filter screen (122) and a filter A material (123), the filter material (123) is arranged between the inner and outer filter nets (121, 122). 4. A rainwater secondary filter device according to claim 3, characterized in that: between the inner and outer filter screens (121, 122), there is a filter for connecting the inner and outer layer filter screens (121, 122). ) of the rib sheet (124). 5. The rainwater secondary filter device according to claim 4, characterized in that: the filter material (123) is one of ceramsite, quartz sand and fiber ball. the

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