High-pressure jet type backwashing filter

Abstract

The utility model relates to a filter, and particularly discloses a high-pressure jet type backwashing filter. The device comprises a tank body, a cylindrical filter screen is arranged in the tank body, a water inlet pipe and a water outlet pipe are arranged on the tank body, the water inlet pipe is provided with a first-stage branch pipe, the first-stage branch pipe is connected with a plurality of second-stage branch pipes, the second-stage branch pipes extend into the tank body and then are connected with an annular pipe, and the inner ring and the outer ring of the annular pipe are in sealed connection with the inner wall of the tank body and the cylindrical filter screen respectively. The annular pipe is downwards connected with a plurality of injection pipes, and a plurality of water injection nozzles facing the cylindrical filter screen are formed in the injection pipes. The diameters of the water inlet pipe, the first-stage branch pipe, the second-stage branch pipe and the injection pipe are gradually reduced, so that the water flow pressure in each branch pipe is increased, the water flow sprayed out of the injection pipe reaches a plurality of times of the initial water flow finally, dirt adsorbed on the cylindrical filter screen is powerfully washed, and the cleaning efficiency is improved. And in addition, disassembly, manual drilling and the like are not needed, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to a filter, in particular to a high-pressure jet backwashing filter. Background Art

[0002] In recent years, with the development of cogeneration and clean energy in my country's heating industry, the utilization rate of long-distance heating pipelines has become increasingly higher. The circulating water filter is an indispensable device in the long-distance heating pipeline. The circulating water filter is used to filter dirt and impurities in the circulating water so that it no longer participates in the circulation. The cleaning problem of the filter follows. The current filter for circulating water usually installs a cylindrical filter in the filter tank. The water inlet pipe is the same as the filter, and the outlet pipe is connected to the tank. After the sewage enters the filter, it is filtered by the filter and discharged from the outlet pipe to enter the next cycle. When cleaning the filter, the tank must be opened, or it must be cleaned from the manhole, which is very troublesome, time-consuming and labor-intensive, and affects efficiency. Utility Model Content

[0003] In order to make up for the defects of the prior art, the utility model provides a high-pressure jet backwashing filter which is convenient and quick to clean.

[0004] The utility model is realized through the following technical solutions:

[0005] A high-pressure jet backwash filter comprises a tank body, a cylindrical filter screen is arranged in the tank body, and a water inlet pipe and a water outlet pipe are arranged on the tank body. The characteristic of the filter is that the water inlet pipe is provided with a primary branch pipe, the primary branch pipe is connected to a plurality of secondary branch pipes, the secondary branch pipes are connected to an annular pipe after extending into the tank body, the inner and outer circles of the annular pipe are respectively sealed with the inner wall of the tank body and the cylindrical filter screen, the annular pipe is downwardly connected to a plurality of jet pipes, and the jet pipes are provided with a plurality of water spray ports facing the cylindrical filter screen; the diameter of the primary branch pipe is smaller than the diameter of the water inlet pipe, and the diameter of the secondary branch pipe is smaller than the diameter of the primary branch pipe.

[0006] The ratio of the diameter of the water inlet pipe to the diameter of the first-level branch pipe is 10:3-4.

[0007] The sum of the diameters of all the secondary branch pipes is equal to the diameter of the primary branch pipe, and the diameters of these secondary branch pipes are equal.

[0008] There are two secondary branch pipes.

[0009] The diameter of the injection pipe is smaller than the diameter of the secondary branch pipe.

[0010] The beneficial effects of the utility model are:

[0011] The diameters of the water inlet pipe, the primary branch pipe, the secondary branch pipe and the injection pipe arranged in the utility model gradually decrease, thereby increasing the water flow pressure in each branch pipe, and finally the water flow sprayed out from the injection pipe reaches several times of the initial water flow, which powerfully flushes the dirt adsorbed on the cylindrical filter net, can have a very good cleaning effect, and there is no need for disassembly, manual drilling, etc., which saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0014] Figure 2 for Figure 2 Schematic diagram of the local structure in the middle A direction;

[0015] Figure 3 It is a partial cross-sectional structural schematic diagram of the utility model;

[0016] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0017] Figure 5 for Figure 3 Schematic diagram of the local cross-section structure in the CC direction.

[0018] In the figure, 1 is a tank body, 2 is a cylindrical filter screen, 3 is a water inlet pipe, 4 is a water outlet pipe, 5 is a sewage pipe, 6 is a primary branch pipe, 7 is a secondary branch pipe, 8 is a ring pipe, 9 is a jet pipe, 10 is a water spray port, and 11 is a valve. DETAILED DESCRIPTION

[0019] The accompanying drawings are specific embodiments of the present utility model. Figures 1 to 5 As shown, the high-pressure jet backwash filter comprises a horizontal tank body 1, a cylindrical filter screen 2 is installed in the tank body 1, an inlet pipe 3 is installed at one end of the tank body 1, a sewage pipe 5 and an outlet pipe 4 are installed on one side of the tank body 1, the inlet pipe 3 is connected with the cylindrical filter screen 2, and the circulating water enters the tank body 1 from the inlet pipe 3, is filtered by the cylindrical filter screen 2, and is discharged into the tank body 1, and then discharged from the outlet pipe 4.

[0020] A primary branch pipe 6 is connected to the water inlet pipe 3, and the ratio of the diameter of the water inlet pipe 3 to the primary branch pipe 6 is 10:3-4. For example, the diameter of the water inlet pipe 3 is generally 1 meter, and the diameter of the primary branch pipe 6 can be 0.3 meter, 0.4 meter, 0.36 meter, etc.

[0021] Inside the tank body 1 , there is a ring tube 8 around the cylindrical filter screen 2 , which is connected to the inner wall of the tank body 1 and the outer wall of the cylindrical filter screen 2 , respectively, so that a sealed connection is formed between the tank body 1 , the ring tube 8 and the cylindrical filter screen 2 .

[0022] The primary branch pipe 6 is divided into several secondary branch pipes 7, the diameters of these secondary branch pipes 7 are equal, and the sum of the diameters of these secondary branch pipes 7 is equal to the diameter of the primary branch pipe 6. Taking two secondary branch pipes 7 as an example, if the diameter of the primary branch pipe 6 is 0.3 meters, then the diameter of each secondary branch pipe 7 is 0.15 meters.

[0023] The secondary branch pipe 7 extends into the tank body 1 and is directly connected to the annular pipe 8 .

[0024] The diameter of the annular pipe 8 is typically 0.25 m.

[0025] The annular pipe 8 is downwardly connected to a plurality of spray pipes 9 , which are evenly distributed radially around the cylindrical filter screen 2 , and are provided with a plurality of water spray ports 10 facing the cylindrical filter screen 2 .

[0026] The diameter of the injection pipe 9 is typically 0.065 m.

[0027] Valves 11 are installed on the water inlet pipe 3 , the primary branch pipe 6 and the sewage pipe 5 respectively. These valves 11 can be manual valves or electric valves. Among them, the valve 11 on the water inlet pipe 3 is located between the primary branch pipe 6 and the tank body 1 .

[0028] The usage process is as follows:

[0029] When the long-distance heating pipeline network operates normally, the valve 11 on the water inlet pipe 3 is opened, and the valves 11 on the first-level branch pipe 6 and the sewage pipe 5 are in a closed state; when the cylindrical filter screen 2 needs to be cleaned, the valve 11 on the water inlet pipe 3 is closed, and the valves 11 on the first-level branch pipe 6 and the sewage pipe 5 are opened, and the circulating water enters the first-level branch pipe 6 through the water inlet pipe 3, and then enters the second-level branch pipe 7, the annular pipe 8 and the injection pipe 9 in turn. Since the diameters between the water inlet pipe 3, the first-level branch pipe 6, the second-level branch pipe 7 and the water injection pipe gradually decrease, the water flow pressure becomes higher and higher, and finally the water pressure sprayed out from the water injection port 10 will reach several times the water pressure in the water inlet pipe 3. In this way, the high-pressure water sprayed out from the water injection port 10 performs high-pressure flushing on the dirt adhering to the cylindrical filter screen 2, and the flushed sewage is discharged from the sewage pipe 5.

[0030] After flushing is completed (you can set it yourself), close the valve 11 on the primary branch pipe 6 and the sewage pipe 5, open the valve 11 on the water inlet pipe 3, and continue the filtering work of the circulating water.

[0031] Except for the technical features described in the specification, the other technical features are known technologies to those skilled in the art.

Claims

1. A high-pressure jet backwash filter, comprising a tank body (1), wherein a cylindrical filter screen (2) is arranged inside the tank body (1), and a water inlet pipe (3) and a water outlet pipe (4) are arranged on the tank body (1), wherein: The water inlet pipe (3) is provided with a primary branch pipe (6), the primary branch pipe (6) is connected to a plurality of secondary branch pipes (7), the secondary branch pipe (7) is extended into the tank body (1) and then connected to an annular pipe (8), the inner and outer circles of the annular pipe (8) are respectively sealed with the inner wall of the tank body (1) and the cylindrical filter screen (2), the annular pipe (8) is downwardly connected to a plurality of injection pipes (9), the injection pipes (9) are provided with a plurality of water injection ports (10) facing the cylindrical filter screen (2); the diameter of the primary branch pipe (6) is smaller than the diameter of the water inlet pipe (3), and the diameter of the secondary branch pipe (7) is smaller than the diameter of the primary branch pipe (6).

2. The high-pressure jet backwash filter according to claim 1, characterized in that: The ratio of the diameters of the water inlet pipe (3) and the primary branch pipe (6) is 10:3-4.

3. The high pressure jet backwash filter according to claim 2, characterized in that: The sum of the diameters of all the secondary branch pipes (7) is equal to the diameter of the primary branch pipe (6), and the diameters of these secondary branch pipes (7) are equal.

4. The high pressure jet backwash filter according to claim 2, characterized in that: There are two secondary branch pipes (7).

5. The high-pressure jet backwash filter according to claim 3 or 4, characterized in that: The diameter of the injection pipe (9) is smaller than the diameter of the secondary branch pipe (7).

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