An internal backwash filter

Abstract

The utility model discloses an internal backwashing filter, comprising an outer shell, a motor, a shaft, an inner frame and a backwashing nozzle. When backwashing is required, the pressure difference between the inside and outside of the filter element will be triggered, and the motor drives the inner frame and the backwashing nozzle to rotate. The filtered raw liquid will be driven by the pressure difference to perform backwashing filtration, so that when the filter is in the process of backwashing, only less than 1% of the linear flow per unit time is used for cleaning, the system impact is small, and the loss of liquid is also small.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to an internal backwashing filter. Background Art

[0002] The filter is an indispensable device on the pipeline for conveying media. It is usually installed at the inlet end of the pressure reducing valve, pressure relief valve, water level valve, and other equipment of Fanggong filter. The filter consists of a cylinder, a stainless steel filter, a sewage discharge part, a transmission device, and an electrical control part. After the water to be treated passes through the filter cartridge of the filter screen, its impurities are blocked. When cleaning is required, just take out the detachable filter cartridge, treat it, and reinstall it. Therefore, it is extremely convenient to use and maintain.

[0003] Automatic backwash filter is a kind of filtering equipment that does not need to stop to replace the filter element. When the filter element is clean, it is like an ordinary pipeline filter. When the filter element is blocked by dirt and needs to be cleaned, it uses the principle of backwashing to achieve the purpose of automatic cleaning of the filter element. Backwashing refers to the use of the pressure difference between pipeline pressure and atmospheric pressure to complete the cleaning process.

[0004] Most similar products on the market currently have shortcomings such as excessive initial pressure difference, poor backwashing cleaning effect, and high liquid loss. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the above problems and / or the problems existing in an existing internal backwashing filter, the utility model is proposed.

[0007] Therefore, the purpose of the utility model is to provide an internal backwash filter, including an outer shell, a motor, a shaft, an inner skeleton and a backwash nozzle. When backwashing is required, the pressure difference between the inside and outside of the filter element will be triggered, and the motor will drive the inner skeleton and the backwash nozzle to rotate. The filtered raw liquid will be driven by the pressure difference for backwashing filtration, so that when the filter is in the process of backwashing, only less than 1% of the linear flow rate per unit time is used for cleaning, the system impact is small, and the loss of liquid is also small.

[0008] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0009] An internal backwash filter comprising:

[0010] An outer shell, the top of which is provided with a motor, the output end of the motor extends into the interior of the outer shell and is installed with a shaft rod, the interior of the outer shell is rotatably connected with an inner skeleton, the inner skeleton is cylindrical, the inner skeleton has a filter element, the outer wall of the inner skeleton is provided with filter holes, the inner skeleton is coaxially fixedly connected with the shaft rod, a backwashing nozzle is provided between the inner skeleton and the shaft rod, and a nozzle groove is provided inside the backwashing nozzle.

[0011] As a preferred solution of the internal backwash filter described in the utility model, a filter outlet is provided at a position corresponding to the side wall of the outer shell and the inner frame, and a filter inlet is provided at a position below the side wall of the outer shell.

[0012] As a preferred solution of the internal backwash filter described in the utility model, the outer shell has a sewage pipe, and the top end of the sewage pipe is connected to the bottom end of the shaft rod.

[0013] As a preferred solution of the internal backwash filter described in the utility model, a first pressure sensor is provided at the connection between the shaft rod and the sewage pipe, and a second pressure sensor is provided inside the shaft rod.

[0014] As a preferred solution of the internal backwash filter described in the utility model, the outer wall of the outer shell is provided with a backwash valve, the backwash valve is connected to the sewage pipe, and an electric control box is installed on the outer wall of the outer shell.

[0015] Compared with the existing technology: it includes an outer shell, a motor, a shaft, an inner frame and a backwash nozzle. When backwashing is required, the pressure difference between the inside and outside of the filter element will be triggered, and the motor will drive the inner frame and the backwash nozzle to rotate. The filtered raw liquid will be driven by the pressure difference for backwashing filtration, so that when the filter is in the backwashing process, only less than % of the linear flow rate per unit time is used for cleaning, the system impact is small, and the loss of liquid is also small. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0017] Figure 1 This is the overall structure diagram of an internal backwash filter of the utility model;

[0018] Figure 2 This is a structural diagram of the inner skeleton of an internal backwash filter of the utility model. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0020] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0021] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] The utility model provides an internal backwashing filter, comprising an outer shell, a motor, a shaft, an inner frame and a backwashing nozzle. When backwashing is required, the pressure difference between the inside and outside of the filter element will be triggered, and the motor drives the inner frame and the backwashing nozzle to rotate. The filtered raw liquid will be driven by the pressure difference to perform backwashing filtration, so that when the filter is in the process of backwashing, only less than 1% of the linear flow per unit time is used for cleaning, the system impact is small, and the loss of liquid is also small.

[0023] Figure 1-2 The utility model is a schematic diagram of an internal backwash filter implementation method, please refer to Figure 1-Figure 2 , an internal backwash filter of this embodiment includes:

[0024] The outer shell 1 has a motor 11 at the top, the output end of the motor 11 extends into the outer shell 1 and is installed with a shaft 12, the outer shell 1 is rotatably connected with an inner frame 2, the inner frame 2 is cylindrical, the inner frame 2 has a filter element 21, the outer wall of the inner frame 2 is provided with a filter hole 22, the inner frame 2 is coaxially fixedly connected with the shaft 12, a backwashing nozzle 9 is provided between the inner frame 2 and the shaft 12, a nozzle groove 91 is provided inside the backwashing nozzle 9, a filter outlet 3 is provided at the corresponding position of the side wall of the outer shell 1 and the inner frame 2, a filter inlet 4 is provided at the lower position of the side wall of the outer shell 1, the outer shell 1 has a sewage pipe 5, the top end of the sewage pipe 5 is connected to the bottom end of the shaft 12, a first pressure sensor 6 is provided at the connection between the shaft 12 and the sewage pipe 5, a second pressure sensor 8 is provided inside the shaft 12, the outer wall of the outer shell 1 has a backwashing valve 7, and the backwashing valve 7 is provided on the outer wall of the outer shell 1. The flushing valve 7 is connected to the drain pipe 5. The outer wall of the outer shell 1 is equipped with an electric control box 10. When the liquid with impurities flows into the outer shell 1, the medium to be filtered flows into the filter outer shell 1 through the filter inlet 4 at the bottom and enters the filter element 21 with the bottom opening. The medium flows through the filter element 21 from the inside to the outside, and collects the dirt particles on the inner side of the filter screen of the filter element 21. When backwashing is required, the pressure difference between the inside and outside of the filter element 21 will be triggered, and the fully automatic actuator will open and connect to the atmospheric pressure. A hollow backwashing nozzle 9 passes through the inside of the filter element 21. The backwashing nozzle 9 is designed with a 10mm wide nozzle groove 91. The inner skeleton 2 will be driven by the motor 11 to rotate clockwise. The filtered raw liquid will be driven by the pressure difference for backwashing filtration. In order to filter more effectively, the pressure difference between the inside and outside needs to reach a pressure of more than 3bar. Due to the pressure difference of more than 3bar and the narrow channel of 10mm, the local filter element 21 will be washed by the introduced liquid at high speed to achieve a cleaning effect. When the filter element 21 rotates one circle, the entire backwashing process ends.

[0025] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An internal backwash filter, characterized in that: include: An outer shell (1), wherein a motor (11) is provided at the top of the outer shell (1), wherein the output end of the motor (11) extends into the interior of the outer shell (1) and is provided with a shaft (12), wherein an inner frame (2) is rotatably connected to the interior of the outer shell (1), wherein the inner frame (2) is cylindrical, wherein a filter element (21) is provided inside the inner frame (2), wherein a filter hole (22) is provided on the outer wall of the inner frame (2), wherein the inner frame (2) is coaxially fixedly connected to the shaft (12), wherein a backwashing nozzle (9) is provided between the inner frame (2) and the shaft (12), wherein a nozzle groove (91) is provided inside the backwashing nozzle (9).

2. An internal backwash filter according to claim 1, characterized in that: A filter outlet (3) is provided at a position corresponding to the side wall of the outer shell (1) and the inner frame (2), and a filter inlet (4) is provided at a position below the side wall of the outer shell (1).

3. An internal backwash filter according to claim 1, characterized in that: The outer shell (1) has a sewage discharge pipe (5), and the top end of the sewage discharge pipe (5) is connected to the bottom end of the shaft rod (12).

4. An internal backwash filter according to claim 3, characterized in that: A first pressure sensor (6) is provided at the connection point between the shaft rod (12) and the sewage discharge pipe (5), and a second pressure sensor (8) is provided inside the shaft rod (12).

5. An internal backwash filter according to claim 4, characterized in that: The outer wall of the outer shell (1) is provided with a backwash valve (7), the backwash valve (7) is connected to the sewage discharge pipe (5), and the outer wall of the outer shell (1) is installed with an electric control box (10).

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