CN203235321U - Automatic backwash filtering device - Google Patents

Abstract

The utility model discloses an automatic backwash filtering device which comprises a valve body and a filter element, wherein an inner cavity is molded in the valve body; a water inlet, a pure water outlet and a sewage outlet are formed in the inner cavity; the filter element is vertically arranged in the inner cavity; the sewage outlet is communicated with the lower end of the filter element; the water inlet is communicated with the upper end of the filter element; the pure water outlet is communicated with a space formed between an outer side wall of the filter element and a side wall of the inner cavity; the pure water outlet on the valve body is higher than the sewage outlet; intercepting valves are arranged at the water inlet and the sewage outlet respectively. In the device, the pure water outlet on the valve body is higher than the sewage outlet, and when the sewage outlet is opened while the water inlet is closed, water in the pure water outlet flows to the sewage outlet under the action of gravity and can wash impurities attached to the inner wall of the filter element during filtering from the outer wall to the inner wall of the filter element, so that backwash of the filter element is automatically realized, the impurities on the inner wall of the filter element are effectively removed, and blockage at the filter element is avoided.

Description

Automatic backwash filter device

technical field

The utility model relates to a filtering device, in particular to an automatic backwashing filtering device.

Background technique

The filter is an indispensable device on the conveying medium pipeline. It is usually installed at the inlet end of the pressure reducing valve, pressure relief valve, fixed water level valve or other equipment to eliminate impurities in the medium to protect the normal operation of the valve and equipment. use. When the fluid enters the filter cartridge with a filter element of a certain specification, its impurities are blocked, and the clean filtrate is discharged from the filter outlet. Therefore, after the filter has been used for a period of time, impurities will adhere to the filter element, and it needs to be cleaned before it can be used again. Artificial cleaning will not only shorten the service life of the filter element, but also cause secondary pollution.

In order to solve the above problems, Chinese patent document CN2691681Y discloses a filter that can be cleaned automatically, including a housing, a filter element, a water inlet, a water outlet, a water purification area, and a water purification outlet; one end of the housing is designed with a water inlet, and the other end A water outlet is designed, and the filter element is installed in the inner cavity of the shell, which is a hollow cylinder. There are two ports coaxial with the water inlet and the water outlet respectively and connected to each other. The filter layer of the filter element can be made of PP cotton, hollow fiber, activated carbon , ceramic or porous filter material; the space between the inner cavity of the shell and the outer wall of the filter layer of the filter element is the water purification area, and one end of the shell is designed with a water purification port, which communicates with the water purification area, and the water inlet and outlet of the filter The water ports are respectively connected in series on the tap water pipeline. That is, in the self-cleaning filter described in the above-mentioned patent documents, when the water outlet is closed, tap water flows into the inner cavity of the filter element through the water inlet, and flows to the water purification area after being filtered and purified. The water outlet can absorb clean water; when the water outlet is opened, the tap water will flow out from the water inlet through the inner cavity of the filter element under the pressure, and the filter element cavity will be automatically flushed, and the remaining impurities in the filter element will flow out of the outlet together with the water flow. The water outlet is discharged.

The self-cleaning filter described in the above-mentioned patent documents has the disadvantages of: 1. In this prior art, the flushing effect of the filter is not ideal. The reason is that the water flow direction of the filter is It flows from the inner wall of the filter element to the outer wall of the filter element. At this time, many impurities and dirt will adhere to the inner wall of the filter element. Although the main body of the water flow direction is from one end of the filter element to the other end during flushing, it can be washed away during the flushing process. There are quite a few impurities and dirt, but there will still be some water overflowing from the inner wall of the filter element to the outer wall of the filter element. This part of the water will make the impurities cling to the filter element, and even drill into the pores of the filter element, causing the filter to be blocked; 2. User In the process of use, it is impossible to understand the deposition of impurities in the filter element of the filter, and it is impossible to determine when the filter needs to be cleaned. If there is a small amount of impurities, it is easy to waste water resources. If there are many impurities deposited in the filter element Without cleaning, it will affect the purification speed of tap water and the quality of purified water, resulting in low purification efficiency and poor purification effect.

Utility model content

For this reason, the technical problem to be solved by the utility model is that the filter in the prior art can be cleaned automatically, and the cleaning effect is not ideal, which easily causes the problem of filter clogging; Automatic backwash filter device.

In order to solve the above-mentioned technical problems, the automatic backwash filter device of the present utility model includes

A valve body, an inner cavity is formed on the valve body, and a water inlet, a clean water outlet, and a sewage outlet are formed on the inner cavity;

A filter element, the filter element is arranged in the inner cavity of the valve body, and one end of the inner cavity of the filter element communicates with the water inlet, and the other end of the inner cavity of the filter element communicates with the sewage outlet, The clean water outlet communicates with the space formed between the outer wall of the filter element and the inner cavity side wall;

The filter element is vertically arranged in the inner cavity, and the sewage outlet is connected to the lower end of the filter element, the water inlet is connected to the upper end of the filter element, and the clean water outlet is connected to the valve body. The upper position is higher than the sewage outlet, and the water inlet and the sewage outlet are respectively provided with shut-off valves.

The valve body has a "T"-shaped three-way structure, the sewage outlet is located at the lower end of the longitudinal part of the "T"-shaped three-way structure, and the water inlet and the purified water outlet are respectively located at the "T" Both ends of the transverse portion of the T”-shaped tee structure.

The housing includes a transparent viewing base disposed at the lower end of the filter element.

A sealing ring is sleeved between the upper end port of the filter element and the corresponding inner wall of the inner cavity, and between the lower end port of the filter element and the inner wall of the visible base.

The cut-off valve is a ball valve, the sewage outlet is formed by butt joints of upper and lower joints, the upper joint is connected to the visible base, the lower joint is connected to the sewage discharge joint, and the ball valve is arranged on the lower joint Inside.

The visible base is detachably connected to the valve body, and a flange extending radially from the outer wall of the visible base covers the port of the connecting end of the valve body.

A sealing ring is provided between the outer wall of the visible base and the inner wall of the valve body connection port.

A sealing ring is provided between the visible base and the upper joint.

Compared with the prior art, the above-mentioned technical solution of the utility model has the following advantages:

(1) In the automatic backwash filter device described in the present utility model, the filter element is vertically arranged in the inner cavity, and the sewage outlet is connected to the lower end of the filter element, and the water inlet is connected to the lower end of the filter element. The upper end of the filter element is connected, the position of the clean water outlet on the valve body is higher than that of the sewage outlet, and the water inlet and the sewage outlet are respectively provided with shut-off valves; when the filter element needs to be When flushing, close the water inlet and open the sewage outlet, the water in the clean water outlet will flow to the sewage outlet under the action of gravity, and the impurities adhered to the inner wall of the filter element will be washed from the outer wall of the filter element to the inner wall of the filter element during filtration, thus automatically realizing Automatic reverse flushing of the filter element to effectively remove impurities on the inner wall of the filter element and avoid blockage of the filter element.

(2) In the automatic backwash filter device described in the present invention, the housing also includes a transparent visible base, and the visible base is arranged at the lower end of the filter element; therefore, during use , the user can understand the deposition of impurities in the filter element through the visible base, and can flush the filter element in a timely manner, which can not only ensure the purity of the purified water, but also avoid blind flushing and waste of water resources.

(3) In the automatic backwash filter device described in the present utility model, between the upper end port of the filter element and the corresponding inner wall of the inner cavity, and between the lower end port of the filter element and the inner wall of the visible base Sealing rings are set respectively, so as to prevent unpurified water from penetrating into the purification area and affecting the purification effect.

Description of drawings

In order to make the content of the utility model easier to understand clearly, the utility model will be described in further detail below according to specific embodiments of the utility model in conjunction with the accompanying drawings, wherein

Fig. 1 is the automatic recoil filtering device schematic diagram of the present utility model;

The reference signs in the figure are represented as: 1-valve body; 11-water inlet; 12-clean water outlet; 13-sewage outlet; 2-filter element; 3-visible base; 4-ball valve.

Detailed ways

The following embodiments will be used to further illustrate the present invention in conjunction with the accompanying drawings.

As shown in Figure 1, the automatic backwash filter device described in the utility model includes a valve body 1 and a filter element 2, and an inner cavity is formed on the valve body 1, and a water inlet 11 is formed on the inner cavity to clean water outlet, and sewage outlet 13; the filter element 2 is arranged in the inner cavity of the valve body 1, and one end of the inner cavity of the filter element 2 communicates with the water inlet 11, and the inner cavity of the filter element 2 The other end of the other end communicates with the sewage outlet 13, and the clean water outlet 12 communicates with the space formed between the outer side wall of the filter element 2 and the side wall of the inner cavity; the filter element 2 is in the inner cavity Vertically arranged, and the sewage outlet 13 communicates with the lower end of the filter element 2, the water inlet 11 communicates with the upper end of the filter element 2, and the position of the clean water outlet 12 on the valve body 1 Higher than the sewage water outlet 13, the water inlet 11 and the sewage water outlet 13 are respectively provided with shut-off valves. In this embodiment, when the filter element 2 needs to be flushed, not only the sewage outlet 13 can be directly opened, so that the water entering from the water inlet 11 can flush the filter element 2 in a positive direction, but also because The position of the clean water outlet 12 on the valve body 1 is higher than the sewage outlet 13, when the water inlet 11 is closed and the sewage outlet 13 is opened, the water in the clean water outlet 12 Water will flow to the sewage outlet 13 under the action of gravity, and the impurities adhered to the inner wall of the filter element 2 will be washed away from the outer wall of the filter element 2 towards the inner wall of the filter element 2 when filtering, thereby automatically cleaning the filter element 2 Automatic back flushing is performed to effectively remove impurities on the inner wall of the filter element 2 and avoid clogging of the filter element 2.

On the basis of the above-described embodiments, in this embodiment, the valve body 1 is a "T"-shaped three-way structure, and the sewage outlet 13 is at the lower end of the longitudinal part of the "T"-shaped three-way structure, The water inlet 11 and the clean water outlet 12 are respectively located at the two ends of the transverse part of the "T" type tee structure.

In order to be able to know the impurity deposition in the filter element 2 in time, in this embodiment, the housing also includes a transparent visible base 3, the visible base 3 is arranged at the lower end of the filter element 2, Therefore, during the use of the automatic backwash filter device described in the present utility model, the user can understand the impurity deposition in the filter element 2 through the visible base 3, and can timely check the filter element 2. Flushing can not only ensure the purity of the purified water, but also avoid blind flushing and waste of water resources.

Further, on the basis of the above embodiments, in this embodiment, between the upper end port of the filter element 2 and the inner wall corresponding to the inner cavity, the lower end port of the filter element 2 and the inner wall of the visible base 3 Sealing rings are respectively set between them; thereby preventing unpurified water from penetrating into the purification area and affecting the purification effect.

In this embodiment, as a preferred embodiment, the cut-off valve is a ball valve 4, the sewage outlet 13 is formed by butting an upper joint and a lower joint, the upper joint is connected to the visible base 3, and the lower joint is connected to the visible base 3. The joint is connected with the sewage joint, and the ball valve 4 is arranged in the lower joint.

In order to prevent the water in the valve body 1 from seeping outward, in this embodiment, the visible base 3 is detachably connected to the valve body 1, and the outer wall of the visible base 3 There is a flange extending radially to cover the port of the connecting end of the valve body 1; a sealing ring is arranged between the outer wall of the visible base 3 and the inner wall of the connecting end port of the valve body 1, and the movable A sealing ring is arranged between the viewing base 3 and the upper joint.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (8)

1. automatic back-flushing filtering device comprises

Valve body (1), described valve body forms inner chamber on (1), is formed with water inlet (11) on the described inner chamber, water purification delivery port (12), and sewage outlet (13);

Filter core (2), described filter core (2) is located in the described inner chamber of described valve body (1), and inner chamber one end of described filter core (2) is communicated with described water inlet (11), the other end of the inner chamber of described filter core (2) is communicated with described sewage outlet (13), and the space that forms between described water purification delivery port (12) and described filter core (2) lateral wall and the described intracavity sidewall communicates;

It is characterized in that: described filter core (2) vertically arranges in described inner chamber, and described sewage outlet (13) is communicated with the lower end of described filter core (2), described water inlet (11) is communicated with the upper end of described filter core (2), the position of described water purification delivery port (12) on described valve body (1) is higher than described sewage outlet (13), and described water inlet (11) locates to be provided with respectively block valve with described sewage outlet (13).

2. automatic back-flushing filtering device according to claim 1, it is characterized in that: described valve body (1) is the T-shape three-port structure, described sewage outlet (13) is in the lower end of the longitudinal component of described T-shape three-port structure, and described water inlet (11) and described water purification delivery port (12) are in respectively the two ends of described T-shape three-port structure lateral part.

3. automatic back-flushing filtering device according to claim 1 and 2, it is characterized in that: described housing comprises a transparent visual base (3), and described visual base (3) is arranged on the lower end of described filter core (2).

4. automatic back-flushing filtering device according to claim 3, it is characterized in that: between the upper end port of described filter core (2) inwall corresponding with described inner chamber, be arranged with respectively sealing ring between the inwall of the lower end port of described filter core (2) and described visual base (3).

5. automatic back-flushing filtering device according to claim 4, it is characterized in that: described block valve is ball valve (4), described sewage outlet (13) is made of upper and lower joint docking, described top connection is connected with described visual base (3), described lower contact is connected with pollution discharge joint, and described ball valve (4) is arranged in the described lower contact.

6. automatic back-flushing filtering device according to claim 5, it is characterized in that: removably connect between described visual base (3) and the described valve body (1), and radially be extended with the flange of putting up on described valve body (1) link port on the lateral wall of described visual base (3).

7. automatic back-flushing filtering device according to claim 6 is characterized in that: be provided with sealing ring between described visual base (3) lateral wall and described valve body (1) the link port madial wall.

8. automatic back-flushing filtering device according to claim 7 is characterized in that: be provided with sealing ring between described visual base (3) and the described top connection.

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