Laminated backwashing automatic filter

Abstract

The utility model provides a laminated backwashing automatic filter which comprises a support, and a centrifugal filter unit, a laminated filter unit and an electric control cabinet are mounted on the support. The centrifugal filtering unit comprises a centrifugal filtering body and a desilting tank; the laminated filter unit comprises a water inlet pipe, a water outlet pipe, a blow-off pipe, a laminated filter body, a first electric butterfly valve, a second electric butterfly valve, a first pressure gauge and a second pressure gauge, and the electric control cabinet is electrically connected with the first electric butterfly valve, the second electric butterfly valve, the first pressure gauge and the second pressure gauge respectively. According to the utility model, the centrifugal filter unit is arranged in front of the laminated filter unit, so that the laminated backwashing automatic filter is particularly suitable for a flat sand or multi-sand environment, a net core does not need to be manually and frequently disassembled and manually cleaned and then assembled, the labor intensity of an operator is greatly reduced, and meanwhile, the continuous irrigation is ensured without shutdown during irrigation; the service life of the laminated filter unit is prolonged, and the backwashing frequency of the laminated filter unit is reduced.

Description

Technical Field

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

[0002] At present, the common irrigation filters on the market include centrifugal filters, gravel filters, mesh filters, and laminated filters. Different filters have different filtering focuses. Different types of filters need to be selected for different water qualities. For sandy well water, the market mainly uses a combination of centrifugal + manual mesh filters. The filters are highly efficient and low-cost, and are deeply loved by market players. However, this filter also has certain disadvantages. Since sandy well water will cause frequent sand discharge, the mesh filter core is prone to clogging. The mesh core needs to be removed for manual cleaning and then installed into the equipment to restart. If the sand is not discharged in time, it may cause the mesh to be blocked, which will reduce the continuity and efficiency of irrigation. Utility Model Content

[0003] The utility model aims to provide a laminated backwashing automatic filter to solve the problems existing in the prior art mentioned in the above background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] The laminated backwashing automatic filter comprises a bracket, on which a centrifugal filter unit, a laminated filter unit and an electric control cabinet are installed;

[0006] The centrifugal filter unit comprises a centrifugal filter body and a sand settling tank, wherein a sand inlet pipe in the middle of the top of the sand settling tank is connected to the bottom of the centrifugal filter body, and a sand discharge pipe is arranged in the middle of the bottom of the sand settling tank;

[0007] The laminated filter unit comprises an inlet pipe, an outlet pipe, a sewage pipe, and a laminated filter body. A plurality of laminated filter bodies are arranged in parallel between the inlet pipe and the outlet pipe, and the middle position of the top of the laminated filter body is connected to the inlet pipe through a pipe, and the middle position of the bottom of the laminated filter body is connected to the outlet pipe through a pipe. A first electric butterfly valve is arranged on the pipe between the laminated filter body and the inlet pipe, the water inlet end of the sewage pipe is connected to the pipe between the laminated filter body and the inlet pipe, a second electric butterfly valve is arranged at the water inlet end of the sewage pipe, a first pressure gauge is arranged at the inlet end of the inlet pipe, a second pressure gauge is arranged at the outlet end of the outlet pipe, and the inlet pipe is connected to the water outlet arranged at the top of the centrifugal filter body;

[0008] The electric control cabinet is electrically connected to the first electric butterfly valve, the second electric butterfly valve, the first pressure gauge, and the second pressure gauge respectively.

[0009] Furthermore, the centrifugal filter body includes a shell and a central filter element arranged in the upper part of the shell. The shell is composed of an upper cylindrical section and a lower conical section. The cylindrical section is provided with a tangential water inlet.

[0010] Preferably, the upper portion of the central filter element is a cylindrical portion, and the lower portion is a conical portion, a plurality of water inlet holes are evenly arranged on the side wall of the conical portion, and the lower end of the conical portion is open.

[0011] Preferably, a lower filter plate is provided at the lower portion of the cylindrical portion.

[0012] Preferably, an upper filter plate is provided on the upper portion of the cylindrical portion.

[0013] Preferably, the cavity between the upper filter plate and the lower filter plate is filled with a quartz sand layer.

[0014] Beneficial technical effects of the utility model:

[0015] In the utility model, a centrifugal filter unit is placed in front of the laminated filter unit, so that the laminated backwashing automatic filter of the utility model is particularly suitable for flat sand or sandy environments. There is no need to manually remove the mesh core frequently and manually clean the mesh core and then assemble it, which greatly reduces the labor intensity of operators. At the same time, the machine is not stopped during irrigation to ensure the continuity of irrigation; it is beneficial to extend the service life of the laminated filter unit and reduce the backwashing frequency of the laminated filter unit. The centrifugal filter unit separates the sand and gravel in the water and sinks it into the sand settling tank. The de-sanded water is diverted through the water inlet pipe under the action of centripetal buoyancy and enters multiple laminated filter bodies for filtration; the laminated filter unit can realize backwashing without manual disassembly and cleaning, thereby ensuring the long-term stable use of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the laminated backwashing automatic filter of the utility model;

[0017] Figure 2 This is a front view of the laminated backwashing automatic filter of the utility model;

[0018] Figure 3 It is a rear view of the laminated backwashing automatic filter of the utility model;

[0019] Figure 4 It is a top view of the laminated backwashing automatic filter of the utility model;

[0020] Figure 5 It is a right view of the laminated backwashing automatic filter of the utility model;

[0021] Figure 6 for Figure 1 Schematic diagram of the internal structure of the centrifugal filter body;

[0022] Figure markings: 1- bracket, 2- centrifugal filter body, 201- shell, 202- center filter element, 2021- upper filter plate, 2022- quartz sand layer, 2023-lower filter plate, 3- sand settling tank, 4- water inlet pipe, 5- water outlet pipe, 6- laminated filter body, 7- sewage pipe, 8- first electric butterfly valve, 9- second electric butterfly valve, 10- first pressure gauge, 11- second pressure gauge, 12- electric control cabinet. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0024] In the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present patent. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set, they can be directly connected, or indirectly connected through an intermediate medium, or they can be internally connected between two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0025] like Figure 1-6 As shown, the laminated backwashing automatic filter provided in this embodiment includes a bracket 1, on which a centrifugal filter unit, a laminated filter unit, and an electric control cabinet 12 are installed;

[0026] The centrifugal filter unit comprises a centrifugal filter body 2 and a sand settling tank 3. The sand inlet pipe in the middle of the top of the sand settling tank 3 is connected to the bottom of the centrifugal filter body 2, and a sand discharge pipe is arranged in the middle of the bottom of the sand settling tank 3.

[0027] The laminated filter unit comprises an inlet pipe 4, an outlet pipe 5, a sewage pipe 7, and a laminated filter body 6. A plurality of laminated filter bodies 6 are arranged in parallel between the inlet pipe 4 and the outlet pipe 5, and the middle position of the top of the laminated filter body 6 is connected to the inlet pipe 4 through a pipe, and the middle position of the bottom of the laminated filter body 6 is connected to the outlet pipe 5 through a pipe. A first electric butterfly valve 8 is arranged on the pipe between the laminated filter body 6 and the inlet pipe 4, and the water inlet end of the sewage pipe 7 is connected to the pipe between the laminated filter body 6 and the inlet pipe 4. A second electric butterfly valve 9 is arranged at the water inlet end of the sewage pipe 7, a first pressure gauge 10 is arranged at the inlet end of the inlet pipe 4, and a second pressure gauge 11 is arranged at the outlet end of the outlet pipe 5. The inlet pipe 4 is connected to the water outlet arranged at the top of the centrifugal filter body 2;

[0028] The electric control cabinet 12 is electrically connected to the first electric butterfly valve 8 , the second electric butterfly valve 9 , the first pressure gauge 10 , and the second pressure gauge 11 , respectively.

[0029] Specifically, the centrifugal filter body 2 includes a shell 201 and a central filter element 202 arranged in the upper part of the shell 201, the shell 201 is composed of an upper cylindrical section and a lower conical section, and the cylindrical section is provided with a tangential water inlet; the upper part of the central filter element 202 is a cylindrical part, and the lower part is a conical part, and a plurality of water inlet holes are evenly arranged on the side wall of the conical part, and the lower end of the conical part is open; the lower part of the cylindrical part is provided with a lower filter plate 2023, and the upper part is provided with an upper filter plate 2021; the cavity between the upper filter plate 2021 and the lower filter plate 2023 is filled with a quartz sand layer 2022.

[0030] In the present invention, for the centrifugal filter unit, the quartz sand layer 2022 uses quartz sand with a particle size of 1-20 mesh. For the laminated filter unit, the diameters of the water inlet pipe 4 and the water outlet pipe 5 are DN200, the diameter of the sewage pipe 7 is DN80, the working pressure is 0.2-0.6MPa, and the design flow rate is 200-500m 3 / h.

[0031] In the utility model, a PLC controller is arranged in the electric control cabinet 12, and the first pressure gauge 10 and the second pressure gauge 11 respectively collect the pressure values ​​in the water inlet pipe 4 and the water outlet pipe 5. During normal filtration, the PLC controller controls the first electric butterfly valve 8 to open and the second electric butterfly valve 9 to close; the sand-containing well water of the sand-rich well is separated from the sand and gravel in the water by the centrifugal filter body 2 and sinks into the sand settling tank 3, and the desanded water is diverted through the water inlet pipe 4 under the action of centripetal buoyancy and enters multiple laminated filter bodies 6 for filtration. After filtration, it flows out through the water outlet pipe 5; when the pressure difference between the first pressure gauge 10 and the second pressure gauge 11 exceeds the preset value, the PLC controller controls the first electric butterfly valve 8 corresponding to the laminated filter body 6 that needs to be backwashed to close and the second electric butterfly valve 9 to close. After a period of backwashing, the first electric butterfly valve 8 corresponding to the laminated filter body 6 is opened and the second electric butterfly valve 9 is closed, and the multiple laminated filter bodies 6 are backwashed in sequence in the above manner.

[0032] In the utility model, in addition to the pressure change in the control process, a timer can also be set to perform sand discharge and backwashing at a regular time.

[0033] The above is a preferred embodiment of the utility model, which is used to explain the technical solution of the utility model in more detail, so that those skilled in the art can understand and use the utility model well. Those skilled in the art can also make routine modifications, equivalent substitutions and improvements within the spirit and principles of the utility model.

Claims

1. A laminated backwashing automatic filter, including a bracket, characterized in that: The bracket is equipped with a centrifugal filter unit, a laminated filter unit, and an electric control cabinet; The centrifugal filter unit comprises a centrifugal filter body and a sand settling tank, wherein a sand inlet pipe in the middle of the top of the sand settling tank is connected to the bottom of the centrifugal filter body, and a sand discharge pipe is arranged in the middle of the bottom of the sand settling tank; The laminated filter unit comprises an inlet pipe, an outlet pipe, a sewage pipe, and a laminated filter body. A plurality of laminated filter bodies are arranged in parallel between the inlet pipe and the outlet pipe, and the middle position of the top of the laminated filter body is connected to the inlet pipe through a pipe, and the middle position of the bottom of the laminated filter body is connected to the outlet pipe through a pipe. A first electric butterfly valve is arranged on the pipe between the laminated filter body and the inlet pipe, the water inlet end of the sewage pipe is connected to the pipe between the laminated filter body and the inlet pipe, a second electric butterfly valve is arranged at the water inlet end of the sewage pipe, a first pressure gauge is arranged at the inlet end of the inlet pipe, a second pressure gauge is arranged at the outlet end of the outlet pipe, and the inlet pipe is connected to the water outlet arranged at the top of the centrifugal filter body; The electric control cabinet is electrically connected to the first electric butterfly valve, the second electric butterfly valve, the first pressure gauge, and the second pressure gauge respectively.

2. The laminated backwashing automatic filter according to claim 1 is characterized in that: The centrifugal filter body comprises a shell and a central filter element arranged at the upper part of the shell. The shell is composed of an upper cylindrical section and a lower conical section. The cylindrical section is provided with a tangential water inlet.

3. The laminated backwashing automatic filter according to claim 2 is characterized in that: The upper part of the central filter element is a cylindrical part, and the lower part is a conical part. The side wall of the conical part is evenly provided with a plurality of water inlet holes, and the lower end of the conical part is open.

4. The laminated backwashing automatic filter according to claim 3 is characterized in that: A lower filter plate is provided at the lower part of the cylindrical part.

5. The laminated backwashing automatic filter according to claim 4 is characterized in that: An upper filter plate is provided on the upper portion of the cylindrical portion.

6. The laminated backwashing automatic filter according to claim 5 is characterized in that: The cavity between the upper filter plate and the lower filter plate is filled with a quartz sand layer.

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