Backwash filter tank for breeding

Abstract

The utility model discloses a backwashing filter tank for cultivation. The backwashing filter tank comprises a tank body, a sewage filtering unit and a backwashing unit, the sewage filtering unit comprises a filter material layer, a supporting layer and a filter brick layer from top to bottom; a pipe distribution chamber is arranged below the tank body; the backwashing unit comprises a conveying pipe, a plurality of side washing pipes, a bottom washing pipe and a conveying branch pipe; the conveying branch pipes are correspondingly connected with the filter brick layers; penetrating holes are formed in the supporting layer; one side of the tank body is provided with a water inlet pipe, and the other side is provided with a pollution discharge gate; the top of the bottom flushing pipe is connected with an arc-shaped protective cover. According to the utility model, the backwashing unit is arranged below the tank body, the backwashing unit consists of the conveying pipe, the side washing pipes which are vertically arranged, the bottom washing pipe and the conveying branch pipe, the head ends of the side washing pipes are connected with the one-way valves, and the arc-shaped protective cover is arranged at the top of the bottom washing pipe, so that dirt is prevented from entering to cause blockage; the back flushing device has the advantages of being not easy to block and relatively good in back flushing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of aquaculture and fishery, in particular to a backwash filter tank for aquaculture. Background Art

[0002] The filter tank is a commonly used facility in fish farming. During use, it needs to be backwashed frequently according to the situation to remove harmful impurities such as sludge precipitated and mixed in the filter material at the bottom of the filter tank.

[0003] The existing filter tank adopts the traditional method of arranging backwash pipes at the bottom to inject backwash water into the filter material from bottom to top for backwashing; using this method, the backwash pipes are often blocked by dirt and impurities, thereby affecting the backwash effect. Utility Model Content

[0004] The purpose of the utility model is to provide a backwash filter for aquaculture, which has the advantages of being less prone to clogging and having a relatively better backwashing effect.

[0005] The technical solution of the utility model is as follows: a backwash filter tank for aquaculture, comprising a tank body, a sewage filter unit arranged in the tank body and a backwash unit arranged below the tank body; the sewage filter unit comprises a filter material layer, a support layer and a filter brick layer from top to bottom; a pipe layout chamber for installing the backwash unit is provided below the tank body, and the backwash unit comprises a delivery pipe horizontally arranged in the pipe layout chamber, a plurality of vertically arranged side flushing pipes, a bottom flushing pipe and a delivery branch pipe; the delivery branch pipe passes through the tank body and is connected to the filter brick layer accordingly; a through hole for flushing is provided on the support layer; a water inlet pipe is provided above one side of the tank body, and a sewage gate is provided below the other side, and the sewage gate corresponds to the filter material layer; the head end of the side flushing pipe is connected to a one-way valve, and the top of the bottom flushing pipe is connected to an arc-shaped protective cover.

[0006] In the aforementioned backwash filter tank for aquaculture, the filter brick layer includes multiple groups of filter brick units, each group of filter brick units is provided with multiple adjacent filter bricks; gaps are provided between adjacent filter brick units for the bottom flushing pipe to pass through; the bottom flushing pipe passes through the support layer and is arranged at the bottom of the filter material layer; the filter brick is a cylindrical structure with a small top and a large bottom, the filter brick is hollow inside, and a liquid inlet for the delivery branch pipe to pass through is provided at the bottom, and multiple upper water distribution holes are distributed on the left and right sides of the top.

[0007] In the aforementioned backwash filter tank for aquaculture, a connecting unit is provided between adjacent filter bricks; the connecting unit includes an upper fixed block corresponding to the upper part of the filter brick, a lower fixed block corresponding to the bottom of the filter brick, and a connecting screw that penetrates and connects the upper fixed block and the lower fixed block; the upper fixed block is in the shape of an inverted trapezoid.

[0008] In the aforementioned backwash filter for aquaculture, one end of the side flushing pipe is connected to the conveying pipe, and the other end passes through the tank body and is arranged at the bottom of the filter material layer; the head end of the side flushing pipe is arranged upwardly inclined, and a gradual channel is provided inside the head end of the side flushing pipe; the gradual channel is funnel-shaped, consisting of a water inlet channel and a flushing channel, and the diameter of the water inlet channel is larger than the diameter of the flushing channel.

[0009] In the aforementioned backwash filter for aquaculture, a limit block is provided on the bottom flushing pipe and abuts against the filter brick; the limit block is in an inverted trapezoidal shape and fills the gap between the filter brick units; a diversion channel connected to the bottom flushing pipe is provided in the arc-shaped protective cover; and an outlet of the diversion channel is provided on the outer edge of the bottom of the arc-shaped protective cover.

[0010] Compared with the prior art, the present invention sets a sewage filter unit composed of a filter material layer, a support layer and a filter brick layer in the pool body, sets a pipe laying chamber for laying a backwash unit under the pool body, and the backwash unit is composed of a delivery pipe, a plurality of vertically arranged side flushing pipes, a bottom flushing pipe and a delivery branch pipe. The side flushing pipes are respectively arranged on both sides of the pool body and pass through the pool body to the bottom of the filter material layer. The low flushing pipe is arranged under the pool body and passes through the pool body to be arranged at the bottom of the filter material layer. The delivery branch pipe is connected to the filter brick layer and passes through the filter brick layer to perform backwashing.

[0011] The head end of the side flushing pipe is connected to a one-way valve, and the top of the bottom flushing pipe is provided with an arc-shaped protective cover, thereby effectively preventing dirt from entering the side flushing pipe and the bottom flushing pipe and causing blockage;

[0012] This application is not easy to clog after long-term use, and the backwashing effect is relatively better;

[0013] Therefore, the utility model has the advantages of being less prone to clogging and having a relatively better backwashing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0016] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0017] Markings in the accompanying drawings: 1-tank body, 11-water inlet pipe, 12-sewage gate, 13-pipe distribution chamber, 2-filter material layer, 3-support layer, 4-filter brick layer, 5-delivery pipe, 51-side flushing pipe, 52-bottom flushing pipe, 53-delivery branch pipe, 521-arc protective cover, 61-upper fixing block, 62-lower fixing block, 63-connecting screw, 7-limiting block. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0019] Example. Backwash filter for aquaculture, such as Figure 1-3 As shown, it includes a pool body 1, a sewage filter unit arranged in the pool body 1 and a backwash unit arranged below the pool body 1; the sewage filter unit is composed of a filter material layer 2, a support layer 3 and a filter brick layer 4 from top to bottom; a pipe layout chamber 13 for installing the backwash unit is provided below the pool body 1, and the backwash unit includes a delivery pipe 5 horizontally arranged in the pipe layout chamber 13, a plurality of vertically arranged side flushing pipes 51, a bottom flushing pipe 52 and a delivery branch pipe 53; the delivery branch pipe 53 passes through the pool body 1 and is connected to the filter brick layer 4; a through hole for flushing is provided on the support layer 3; an inlet pipe 11 is provided above one side of the pool body 1, and a sewage gate 12 is provided below the other side, and the sewage gate 12 corresponds to the filter material layer 2; the head end of the side flushing pipe 51 is connected to a one-way valve, and the top of the bottom flushing pipe 52 is connected to an arc-shaped protective cover 521.

[0020] The delivery pipe 5 is connected to the backwash equipment and can deliver gas and water.

[0021] The filter brick layer 4 includes multiple groups of filter brick units, each group of filter brick units is provided with multiple adjacent filter bricks; gaps are provided between adjacent filter brick units for the bottom flushing pipe 52 to pass through; the bottom flushing pipe 52 passes through the support layer 3 and is arranged at the bottom of the filter material layer 2; the filter brick is a cylindrical structure with a small top and a large bottom, the filter brick is hollow inside, and a liquid inlet for the delivery branch pipe 53 to pass through is provided at the bottom, and multiple upper water distribution holes are distributed on the left and right sides of the top.

[0022] The filter brick unit is composed of multiple filter bricks. The filter bricks are cylindrical structures with small upper part and large lower part. There are water distribution holes on both sides of the upper part of the filter bricks, so that the flushing water can be sprayed out from the water distribution holes and backwash the filter material layer from bottom to top from both sides of the filter bricks, making the backwashing more uniform.

[0023] A connecting unit is provided between adjacent filter bricks; the connecting unit includes an upper fixing block 61 corresponding to the upper part of the filter brick, a lower fixing block 62 corresponding to the bottom of the filter brick, and a connecting screw 63 that penetrates and connects the upper fixing block 61 and the lower fixing block 62; the upper fixing block 61 is in the shape of an inverted trapezoid.

[0024] One end of the side flushing pipe 51 is connected to the conveying pipe 5, and the other end passes through the pool body 1 and is arranged at the bottom of the filter material layer 2; the head end of the side flushing pipe 51 is tilted upward, and a gradual channel is provided inside the head end of the side flushing pipe 51; the gradual channel is funnel-shaped, consisting of a water inlet channel and a flushing channel, and the diameter of the water inlet channel is larger than the diameter of the flushing channel; by setting a gradual channel with a larger inlet and a smaller outlet, the impact force of the water outlet of the side flushing pipe 51 is increased, and the backwashing effect is better.

[0025] The bottom flushing pipe 52 is provided with a limit block 7 corresponding to the filter brick; the limit block 7 is in an inverted trapezoidal shape, and the limit block 7 fills the gap between the filter brick units; the arc-shaped protective cover 521 is provided with a diversion channel connected to the bottom flushing pipe 52; the outer edge of the bottom of the arc-shaped protective cover 521 is provided with an outlet of the diversion channel.

[0026] The system is also equipped with a corresponding automatic backwashing system. A water level signal is installed in the filter tank. When the liquid level in the filter tank touches the water level signal during the filtration process, the sewage gate will be automatically closed; the sewage gate will be opened, and then the backwash fan will be turned on. The backwash water inlet gate will be opened intermittently, and the backwash water will flush out the sludge from bottom to top. The backwash water inlet gate will be opened and closed many times to form a pulsed air-water backwash. After the set time and number of times are sufficient, the above sequence will be reversed to allow the filter tank to resume its filtration state.

Claims

1. Backwash filter for aquaculture, characterized by: The invention comprises a tank body (1), a sewage filter unit arranged in the tank body (1), and a backwash unit arranged below the tank body (1); the sewage filter unit comprises, from top to bottom, a filter material layer (2), a support layer (3), and a filter brick layer (4); a pipe laying chamber (13) for installing the backwash unit is provided below the tank body (1); the backwash unit comprises a delivery pipe (5) arranged horizontally in the pipe laying chamber (13), a plurality of vertically arranged side flushing pipes (51), and a bottom flushing pipe (52). and a delivery branch pipe (53); the delivery branch pipe (53) passes through the tank body (1) and is connected to the filter brick layer (4) in a corresponding manner; a through hole for flushing is provided on the support layer (3); a water inlet pipe (11) is provided above one side of the tank body (1), and a sewage gate (12) is provided below the other side, and the sewage gate (12) corresponds to the filter material layer (2); the head end of the side flushing pipe (51) is connected to a one-way valve, and the top of the bottom flushing pipe (52) is connected to an arc-shaped protective cover (521).

2. The backwash filter for aquaculture according to claim 1, characterized in that: The filter brick layer (4) comprises a plurality of groups of filter brick units, each group of filter brick units being provided with a plurality of adjacently arranged filter bricks; gaps are provided between adjacent filter brick units for a bottom flushing pipe (52) to pass through; the bottom flushing pipe (52) passes through the support layer (3) and is provided at the bottom of the filter material layer (2); the filter brick is a cylindrical structure with a small top and a large bottom, the interior of the filter brick being hollow, a liquid inlet for a delivery branch pipe (53) to pass through being provided at the bottom, and a plurality of upper water distribution holes are distributed on the left and right sides of the top.

3. The backwash filter for aquaculture according to claim 2, characterized in that: A connecting unit is provided between adjacent filter bricks; the connecting unit comprises an upper fixing block (61) corresponding to the upper portion of the filter brick, a lower fixing block (62) corresponding to the bottom portion of the filter brick, and a connecting screw (63) passing through and connecting the upper fixing block (61) and the lower fixing block (62); the upper fixing block (61) is in an inverted trapezoidal shape.

4. The backwash filter for aquaculture according to claim 1, characterized in that: One end of the side flushing pipe (51) is connected to the delivery pipe (5), and the other end passes through the pool body (1) and is arranged at the bottom of the filter material layer (2); the head end of the side flushing pipe (51) is arranged to be inclined upward, and a gradual channel is provided inside the head end of the side flushing pipe (51); the gradual channel is funnel-shaped and consists of a water inlet channel and a flushing channel, and the diameter of the water inlet channel is larger than the diameter of the flushing channel.

5. The backwash filter for aquaculture according to claim 2, characterized in that: The bottom flushing pipe (52) is sleeved with a limit block (7) corresponding to the filter brick; the limit block (7) is in an inverted trapezoidal shape and fills the gap between the filter brick units; a diversion channel communicating with the bottom flushing pipe (52) is provided in the arc-shaped protective cover (521); and an outlet of the diversion channel is provided on the outer edge of the bottom of the arc-shaped protective cover (521).

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