CN219399086U - Automatic back flush system - Google Patents

Abstract

The utility model discloses an automatic back flushing system, which comprises a filter tank, a sewage collecting tank and a siphon component; the filter tank is divided into a clear water cavity at the upper part and a filter cavity at the lower part by the partition plate, a filter layer is arranged in the filter cavity, the siphon component comprises a siphon ascending pipe, a siphon descending pipe, a siphon connecting pipe, a siphon breaking pipe and a siphon auxiliary pipe, wherein one end of the siphon ascending pipe is communicated with the filter cavity of the filter tank, one end of the siphon descending pipe is communicated with the sewage collecting tank, the siphon connecting pipe is obliquely arranged, one end of the siphon breaking pipe is communicated with the clear water cavity, and one end of the siphon auxiliary pipe is communicated with the sewage collecting tank, and the siphon breaking pipe is communicated with the siphon auxiliary pipe through the auxiliary connecting pipe.

Description

Automatic back flush system

Technical Field

The utility model relates to an automatic back flushing system.

Background

The utility model discloses a backwash system for intelligent control backwash sewage treatment system of gravity type equipment in the prior art, such as CN107935273A, which comprises an aeration dissolved oxygen water separator, a drainage system and four groups of filter units, wherein each group of filter units is matched with a group of siphon systems, the aeration dissolved oxygen water separator is positioned at the upper part of the center of the four groups of filter units, each group of filter units comprises a water inlet pipe, a water outlet pipe and a clean water tank, the water inlet pipe is connected with the aeration dissolved oxygen water separator and the siphon systems, the aeration dissolved oxygen water separator is connected with the clean water tank, the water outlet pipe is connected with the clean water tank, and a clean water area, a water inlet area, a filter area and a water collecting area are arranged inside the clean water tank from top to bottom.

In the scheme, though the gravity type back flushing is also performed by utilizing the siphon principle, when the gravity type back flushing device works, sewage enters an aeration dissolved oxygen water separator from a water inlet pipe to perform aeration dissolved oxygen, harmful gas in the sewage is blasted and then enters a water inlet area of a clean water tank, filtering operation is performed through a filtering area positioned at the lower part of the water inlet area, filtered water enters a water collecting area, water positioned in the water collecting area is pumped upwards into the clean water tank through a communicating pipe, and finally flows out of a water outlet pipe to finish filtering; when back flushing is carried out, the B1 electric valve is opened, water enters the siphon descending pipe from the water inlet pipe, air in the pipe is taken away in the flowing process due to downward flow of the water through gravity, impurity sediment in the filtering tank is pumped up through the siphon ascending pipe to form siphonage, then enters the siphon descending pipe, flows downwards into the drainage tank and is discharged through the back flushing drainage pipe, the B1 electric valve is closed after approximately three branches of siphonage are formed, enough time is reserved for sludge pumping, the A1 auxiliary electric valve is opened after approximately three branches of B1 electric valve are closed, the air enters the siphon destruction pipe, the formed siphonage is destroyed to complete back flushing operation of the first filtering unit, and the like, back flushing operation of the subsequent three filtering units is carried out, then the back flushing operation of the subsequent three filtering units is realized by controlling the switching of the electric valve, manual control is needed, and the operation is inconvenient.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide an automatic back flushing system which does not need manual operation and realizes switching between automatic filtration and back flushing.

In order to achieve the technical effects, the technical scheme of the utility model is as follows: an automatic back flushing system comprises a filter tank, a sewage collecting tank and a siphon assembly; the filter tank is separated into a clear water cavity on the upper portion and a filter cavity on the lower portion by the partition plate, a filter layer is arranged in the filter cavity, the siphon assembly comprises a siphon ascending pipe, a siphon descending pipe and a siphon auxiliary pipe, wherein one end of the siphon ascending pipe is communicated with the filter cavity of the filter tank, the siphon descending pipe is communicated with the sewage collecting tank, the siphon auxiliary pipe is provided with a siphon connecting pipe, one end of the siphon breaking pipe is communicated with the clear water cavity, one end of the siphon auxiliary pipe is communicated with the sewage collecting tank, the siphon breaking pipe is communicated with the siphon auxiliary pipe through the auxiliary connecting pipe, the auxiliary connecting pipe is communicated with the siphon connecting pipe, and the lowest point of the siphon ascending pipe is higher than the lowest point of the siphon descending pipe.

Further improved is that the inclination direction of the siphon connecting pipe is from the siphon ascending pipe to the siphon descending pipe from low to high.

Further improved is that the filter layer comprises a first filter layer and a second filter layer, wherein the size of the first filter layer is larger than that of the second filter layer.

Further improved is that the filter layer further comprises a third filter layer located between the first filter layer and the second filter layer, the third filter layer having a size smaller than the size of the first filter layer and larger than the size of the second filter layer.

Further improved is that the pipe diameters of the siphon auxiliary pipe, the siphon breaking pipe and the auxiliary connecting pipe are smaller than those of the siphon rising pipe, the siphon descending pipe and the siphon connecting pipe.

Further improved is that a water collecting device is arranged in the second filter layer, and the water collecting device is communicated with the clear water cavity through a water collecting pipeline.

The utility model has the advantages and beneficial effects that: the source water passes through the filtering layer, and impurity in the water is intercepted and accumulated, and filtering layer resistance increases, causes the water level to rise, and when the water level risees to certain altitude, water passes through an auxiliary siphon this moment, and entire system forms automatic siphon, and equipment back flush begins, and when the water tank water level descends, the siphon destroys the pipe and can destroy the siphon voluntarily, and the siphon ends, opens new filtration cycle, and whole process is automatic to be accomplished, need not the manual work and controls.

Drawings

FIG. 1 is a schematic diagram of the present utility model.

Wherein: 1. a filtering tank; 2. a sewage collection tank; 3. a partition plate; 4. a first filter layer; 5. a second filter layer; 6. a third filter layer; 7. a siphon riser; 8. a siphon connecting pipe; 9. a siphon downcomer; 10. a siphon break pipe; 11. a siphon auxiliary pipe; 12. and an auxiliary connecting pipe.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

As shown in fig. 1, an automatic back flushing system comprises a filter tank 1, a sewage collecting tank 2 and a siphon assembly; the filter tank 1 is divided into a clear water cavity at the upper part and a filter cavity at the lower part by the partition plate 3, a filter layer is arranged in the filter cavity, the siphon assembly comprises a siphon ascending pipe 7 with one end communicated with the filter cavity of the filter tank 1, a siphon descending pipe 9 with one end communicated with the sewage collecting tank 2, a siphon connecting pipe 8 which is communicated with the siphon ascending pipe 7 and is obliquely arranged, a siphon breaking pipe 10 with one end communicated with the clear water cavity, and a siphon auxiliary pipe 11 with one end communicated with the sewage collecting tank 2, the siphon breaking pipe 10 is communicated with the siphon auxiliary pipe 11 through an auxiliary connecting pipe 12, the auxiliary connecting pipe 12 is communicated with the siphon connecting pipe 8, and the lowest point of the siphon ascending pipe is higher than the lowest point of the siphon descending pipe 9.

In the working principle of the scheme, the back flushing is performed by utilizing the siphon principle, in this embodiment, the back flushing is simply described, and no excessive description is made, namely, when the whole filtering system is used for filtering, impurities in water are intercepted by a filtering layer, after a period of time, the filtering layer is blocked, and the water inlet efficiency and the water outlet efficiency are different due to continuous operation of a water pump of the filtering system, so that the water level above the filtering layer can rise, after the water exceeds the siphon rising pipe 7, the water inlet enters the siphon connecting pipe 8 through the siphon rising pipe 7 and then is combined with the water phase of the siphon descending pipe 9 under the action of the siphon auxiliary pipe 11, then a siphon effect is formed, the water above the filtering layer is sucked into a sewage collecting box, and impurities intercepted by the filtering layer are taken away simultaneously, because the water level of the back flushing is caused to fall, when the water level in the clear water cavity is lowered to the lowest point of the siphon breaking pipe 10, the siphon effect is destroyed, the back flushing is stopped, and the filtering is continued, thus forming a cycle, and the whole process is manually controlled, and the automatic formation is realized.

In this embodiment, preferably, the inclination direction of the siphon connection pipe 8 is from the siphon ascending pipe to the siphon descending pipe 9 from low to high.

The filter layer comprises a first filter layer 4 and a second filter layer 5, the size of the first filter layer 4 is larger than that of the second filter layer 5, the filter layer further comprises a third filter layer 6 positioned between the first filter layer 4 and the second filter layer 5, the size of the third filter layer 6 is smaller than that of the first filter layer 4 and larger than that of the second filter layer 5, preferably, the first filter layer 4 adopts cobblestones, the third filter layer 6 adopts natural zeolite, the second filter layer 5 adopts quartz sand, water flows from top to bottom according to gravity, and particles in sewage are trapped in a fine filter layer according to layers through a plurality of layers of composite natural filter materials, so that the filter effect is greatly improved.

In order to facilitate the siphon process at the same time when the filtered water in the clean water cavity is lost in the siphon process, the pipe diameters of the siphon auxiliary pipe 11, the siphon breaking pipe 10 and the auxiliary connecting pipe 12 are smaller than those of the siphon rising pipe, the siphon descending pipe 9 and the siphon connecting pipe 8.

In this embodiment, preferably, a water collecting device is disposed in the second filtering layer 5, and the water collecting device is communicated with the clean water cavity through a water collecting pipe.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims (6)

1. An automatic back flushing system is characterized by comprising a filter tank, a sewage collecting tank and a siphon assembly; the filter tank is separated into a clear water cavity on the upper portion and a filter cavity on the lower portion by the partition plate, a filter layer is arranged in the filter cavity, the siphon assembly comprises a siphon ascending pipe, a siphon descending pipe and a siphon auxiliary pipe, wherein one end of the siphon ascending pipe is communicated with the filter cavity of the filter tank, the other end of the siphon descending pipe is communicated with the sewage collecting tank, the siphon ascending pipe is communicated with the siphon connecting pipe which is obliquely arranged, the siphon breaking pipe is communicated with the clear water cavity at one end of the siphon auxiliary pipe, one end of the siphon auxiliary pipe is communicated with the sewage collecting tank, the siphon breaking pipe is communicated with the siphon auxiliary pipe through the auxiliary connecting pipe, the auxiliary connecting pipe is communicated with the siphon connecting pipe, and the lowest point of the siphon ascending pipe is higher than the lowest point of the siphon descending pipe.

2. The automatic backwash system according to claim 1, wherein the siphon connection pipe is inclined from the siphon riser to the siphon downcomer from low to high.

3. The automatic backwash system of claim 1, wherein the filter layer comprises a first filter layer and a second filter layer, the first filter layer having a size greater than a size of the second filter layer.

4. The automatic backwash system of claim 3, wherein the filter layer further comprises a third filter layer positioned between the first filter layer and the second filter layer, the third filter layer having a size that is smaller than the size of the first filter layer and larger than the size of the second filter layer.

5. The automatic backwash system according to claim 1, wherein the siphon auxiliary pipe, the siphon break pipe and the auxiliary connection pipe have pipe diameters smaller than those of the siphon riser pipe, the siphon downcomer pipe and the siphon connection pipe.

6. An automatic backwash system according to claim 3, wherein a water collecting device is arranged in the second filter layer, said water collecting device being in communication with the clean water chamber via a water collecting pipe.