CN215026694U

CN215026694U - Valveless filter

Info

Publication number: CN215026694U
Application number: CN202120976117.9U
Authority: CN
Inventors: 王树亮; 米占虎; 毛必朋
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2021-12-07
Anticipated expiration: 2031-05-10

Abstract

The utility model discloses a valveless filter, which comprises a water tank, wherein a filter and a back flush terminator are arranged in the water tank, the inlet of the filter is connected with a water inlet pipe and a siphon pipe, a sewage riser section is arranged on the water inlet pipe, and a throttling device is arranged on the sewage riser section; the throttling device comprises a reducer pipe and a rotor, the inner diameter of the reducer pipe is large at the top and small at the bottom, and the rotor is positioned in the reducer pipe and can move up and down in the reducer pipe; the upper end surface of the rotor is larger than the outlet of the throttling device; the rotor is provided with a through hole penetrating through the body, and the through hole is opposite to the passage of the water inlet pipe. The utility model discloses a throttling arrangement is valveless structure, and its theory of operation is the same with rotor flow meter, and during the back flush, filter inlet pressure reduces, the sewage flow is big, and terminal surface pressure difference increases thereupon and leads to the rotor to shift up and plug up throttling arrangement's export about the rotor to reduce the sewage flow, reduced the waste of water on one hand, the water yield through the filter when having increased the back flush on two, can improve the back flush effect.

Description

Valveless filter

Technical Field

The utility model relates to a sewage filtration equipment technical field, especially a valveless filter.

Background

The valveless filter is a common sewage treatment equipment, it is sent into valveless filter with water and filters, along with continuous filtration, the filtering layer resistance increases gradually, the intraductal water level of siphon tedge constantly risees, when the water level reaches the siphon auxiliary pipe mouth of pipe, water falls down from this pipe, through the exhaust tube with the help of the air entrainment of quick rivers in order to take away the air that the siphon descends, further make the system vacuum increase, when the vacuum degree reaches a definite value, just take place siphon action and make water pass through the filtering layer from bottom to top and carry out the back flush to the filter material. Thereby realizing the working state of regular continuous automatic backwashing of the filter, namely filtering-automatic backwashing-filtering.

The existing valveless filters are numerous, such as Chinese application utility models CN201821785605.6 and CN201320314101.7, but because the devices adopt valveless arrangement, a large amount of untreated sewage raw materials can enter a siphon tube in the back washing process, so that more water is wasted during operation, and the operation cost is increased; the water flow of the back flushing of the filter layer during the back flushing is reduced, and the back flushing effect is influenced.

SUMMERY OF THE UTILITY MODEL

For solving the not enough of prior art condition, the utility model provides a valveless filter, this filter set up current limiting device on raw materials sewage inlet pipe, and the device sewage gets into siphon device's flow when having reduced the back flush. The utility model discloses a concrete scheme as follows:

a valveless filter comprises a water tank, wherein a filter and a back flush terminator are arranged in the water tank, a filter bed layer is arranged in the filter, an inlet of the filter is connected with a water inlet pipe and a siphon pipe, and an inlet end of a water outlet pipe of the water tank is higher than a water outlet of the filter, so that a certain amount of liquid is kept in the water tank for back flush; the siphon is of an inverted U-shaped structure, and the top of the inverted U-shaped structure is positioned above the inlet end of the water outlet pipe of the water tank; the back-flushing terminator is communicated with the top of the siphon pipe through a siphon breaking pipe; when the filter is normally filtered, sewage enters the filter through the water inlet pipe, the filtered sewage enters the water tank and is discharged through the water outlet pipe, the liquid level in the siphon pipe gradually rises along with the increase of resistance caused by the accumulation of impurities in the filter, when the liquid overflows to the top of the siphon pipe and descends to form siphon, so that fluid in the water tank reversely flows, the back washing of the filter is realized, and when the liquid level in the water tank reaches the back washing terminator, the siphon is stopped; it is characterized in that the preparation method is characterized in that,

a sewage ascending pipe section is arranged on the water inlet pipe, and a throttling device is arranged on the sewage ascending pipe section; the throttling device is of a structure similar to a rotor flowmeter and comprises a reducer pipe and a rotor arranged in the reducer pipe, wherein the inner diameter of the reducer pipe is large at the top and small at the bottom, the rotor can move up and down in the reducer pipe, the upper end of the reducer pipe is communicated with a water inlet pipe after being reduced in diameter, and the rotor is provided with a through hole penetrating through the body and directly faces to a channel of the water inlet pipe; during back flushing, the pressure at the inlet of the filter is reduced, the flow of sewage is increased, the rotor rises to block the outlet of the throttling device, and only the through hole is reserved for the circulation of the sewage, so that the flow of the sewage is reduced; after the back washing is finished, sewage continuously enters the filter through the through hole, the pressure at the inlet end of the filter is increased, the rotor descends, and the sewage returns to the normal flow.

Furthermore, in order to avoid obviously increasing the resistance of the water inlet pipe after the throttling device is additionally arranged, a limiting structure is arranged in the reducer pipe and used for limiting the position of the rotor moving downwards, so that when the normal filtration is carried out, an annular space is formed between the rotor and the reducer pipe for sewage circulation.

Furthermore, the limiting structure is a cross and is positioned below the rotor.

Compared with the prior art, the method has the following advantages:

the utility model discloses set up throttling arrangement on the inlet tube, this throttling arrangement is valveless structure, and its theory of operation is the same with rotor flow meter, and during the back flush, filter inlet pressure reduces, the sewage flow is big, and terminal surface pressure difference increases thereupon about the rotor and leads to the rotor to shift up and plug up throttling arrangement's export to reduce the sewage flow, once reduced the waste of water, two then increased the water yield through the filter when back flush, can improve the back flush effect.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural view of the throttling device of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the present invention.

Example 1:

referring to fig. 1 and 2, a valveless filter includes an inlet buffer chamber 1 and a water tank 2; a filter 3 and a backwashing terminator 4 are arranged in the water tank 2, and a filter bed layer (not shown in the figure) is arranged in the filter 3; the water inlet buffer chamber 1 is arranged above the side of the water tank 2 and is communicated with the inlet of the filter 3 through a water inlet pipe 5; the water inlet pipe 5 is a U-shaped pipe and comprises a sewage ascending pipe section 51 in which sewage flows from bottom to top, and the sewage ascending pipe section 51 is provided with a throttling device 6 for controlling the sewage flow during backwashing; the inlet of the filter 3 is also connected with a siphon pipe 7; the inlet end of the water outlet pipe 21 of the water tank 2 is positioned above the water outlet of the filter 3, so that certain liquid is kept in the water tank 2 for backwashing; the back flush terminator 4 is communicated with the top of the siphon pipe 7 and is used for destroying siphon; when the filter is normally filtered, sewage enters the filter through the water inlet pipe, the filtered sewage enters the water tank and is discharged through the water outlet pipe, along with the increase of resistance caused by the accumulation of impurities in the filter, the liquid level in the siphon pipe also gradually rises, and when liquid overflows to the top of the siphon pipe and falls, siphons are formed to enable fluid in the water tank to reversely flow, so that the back washing of the filter is realized.

The siphon 7 comprises a siphon ascending pipe 71 and a siphon descending pipe 72 which are connected into an inverted U-shaped structure, the top of the inverted U-shaped structure is positioned above the water tank 2, the inlet of the siphon ascending pipe 71 is communicated with the filter 3, and the outlet of the siphon descending pipe 72 extends into the liquid seal tank 8; in order to assist siphoning, a siphon auxiliary pipe 9 is also connected to the siphon ascending pipe 71, the other end of the siphon auxiliary pipe 9 extends into the liquid seal tank 8, the middle part of the siphon auxiliary pipe 9 is communicated with the top of the siphon pipe 7, when the siphon auxiliary pipe 9 operates, siphoning is firstly generated by the siphon auxiliary pipe 9, suction is generated on the top of the siphon pipe 7 to accelerate the formation of negative pressure on the top of the siphon pipe, so that liquid level in the siphon pipe rises to accelerate the establishment of siphoning through the siphon ascending pipe and the siphon descending pipe, the siphon flow is larger, a large-flow backflushing filter is facilitated, and the backflushing effect is improved; the middle part of the auxiliary siphon pipe 9 is also connected with a forced siphon breaking pipe 10, and the forced siphon breaking pipe 10 is provided with a valve for forcibly introducing air into the top of the siphon pipe in emergency so as to forcibly break the siphon.

The throttling device 6 comprises a reducer 61 and a rotor 62 arranged in the reducer 61, the inner diameter of the reducer 61 is large at the top and small at the bottom, the rotor 62 can move up and down in the reducer 61 and freely rotate by taking the axis of the reducer 61 as the center, the upper end of the reducer 61 is communicated with the water inlet pipe after reducing the diameter, the upper end face of the rotor 62 is larger than the outlet of the throttling device 6, and the rotor 62 is provided with a through hole 621 penetrating through the body, and the through hole is opposite to the passage of the water inlet pipe; during back flushing, the pressure at the inlet of the filter 3 is reduced, the flow of the sewage is increased, the rotor 62 is lifted to block the outlet of the throttling device 6, and only the through hole is reserved for the circulation of the sewage, so that the flow of the sewage is reduced; after the back washing is finished, sewage continuously enters the filter through the through hole, the pressure at the inlet end of the filter is increased, the rotor descends, and the sewage returns to the normal flow. In order to avoid the obvious increase of the resistance of the water inlet pipe 5 after the throttling device 6 is additionally arranged, a limiting structure 63 is arranged in the reducer pipe 61 and used for limiting the downward moving position of the rotor, so that an annular space is formed between the rotor and the reducer pipe for sewage circulation. The limiting structure is a cross and is positioned below the rotor.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiments of the present invention are all covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A valveless filter comprises a water tank, wherein a filter and a back flush terminator are arranged in the water tank, a filter bed layer is arranged in the filter, an inlet of the filter is connected with a water inlet pipe and a siphon pipe, and an inlet end of a water outlet pipe of the water tank is higher than a water outlet of the filter; the siphon is of an inverted U-shaped structure, and the top of the inverted U-shaped structure is positioned above the inlet end of the water outlet pipe of the water tank; the back-flushing terminator is positioned below the inlet end of the water outlet pipe and is communicated with the top of the siphon pipe through a siphon breaking pipe; it is characterized in that the preparation method is characterized in that,

a sewage ascending pipe section is arranged on the water inlet pipe, and a throttling device is arranged on the sewage ascending pipe section;

the throttling device comprises a reducer pipe and a rotor, the inner diameter of the reducer pipe is large at the top and small at the bottom, and the rotor is positioned in the reducer pipe and can move up and down in the reducer pipe; the upper end of the reducer pipe is communicated with the water inlet pipe after reducing the diameter, and the upper end surface of the rotor is larger than the outlet of the throttling device; the rotor is provided with a through hole penetrating through the body, and the through hole is opposite to the passage of the water inlet pipe; during back flushing, the pressure at the inlet of the filter is reduced, the flow of sewage is increased, the rotor rises to block the outlet of the throttling device, and only the through hole is reserved for the circulation of the sewage, so that the flow of the sewage is reduced; after the back washing is finished, sewage continuously enters the filter through the through hole, the pressure at the inlet end of the filter is increased, the rotor descends, and the sewage returns to the normal flow.

2. The valveless filter according to claim 1, wherein a limiting structure is arranged in the reducer pipe and used for limiting the downward movement position of the rotor, so that an annular space is formed between the rotor and the reducer pipe for sewage to flow through.

3. The valveless filter according to claim 2, wherein the limiting structure is a cross below the rotor.