A double-chamber three-stage filtration system

Abstract

The present invention discloses a double-chamber three-stage filtration system, which is used to solve the technical problems of large occupation area, low backwashing efficiency and easy clogging by viscous liquid in the existing agricultural irrigation filtration system. It includes: a first filtration device and a second filtration device, both of which include: a tank body, a first sand and gravel filtration chamber and a second sand and gravel filtration chamber are symmetrically arranged on the upper part, a primary water filtration chamber is arranged in the middle part, and a third water filtration chamber is arranged longitudinally along the central axis at the lower part, a mesh filtration chamber is formed between the side wall of the third water filtration chamber and the lower side wall of the tank body, a plurality of mesh filter cylinders are arranged in the mesh filtration chamber, a second water filtration chamber is formed in the mesh filter cylinder, and a laminated filter core is arranged in the second water filtration chamber; a water inlet pipe and a first sewage pipe; a second sewage pipe; a drainage pipe; compared with the existing technology, the present invention simplifies the system structure, improves the filtered water quality, backwashing effect and efficiency, system life and irrigation efficiency, reduces the occupation area, and reduces the construction cost.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural irrigation equipment, and in particular relates to a double-cavity three-stage filtering system. Background Art

[0002] The filter of the agricultural irrigation system has always been the heart of the agricultural irrigation system. At present, in the filtration system for agricultural irrigation, especially in the automatic backwashing system, in order to achieve the filtration accuracy and realize backwashing, a sandstone filter monomer and a laminated filter monomer are usually connected in series through a pipeline. After the filter is blocked after a period of use, it is cleaned by backwashing. The filtered water of one filter needs to be used to backwash the other filter. There are problems. First, since the sandstone filter and the laminated filter are both monomers, in order to realize backwashing, each filter needs to be equipped with a set of backwashing valves and backwashing controllers separately, which occupies a large area and has poor integration; second, since the laminated filter undertakes all high-precision filtering tasks, it is easy to get blocked when filtering thick liquids. At the same time, during backwashing, the impurities hanging on the laminated space of the laminated filter are not easily washed away due to the influence of mucus, and cannot be completely backwashed. On the one hand, the water quality after filtration is poor, which affects the life of the laminated filter and the filtration system. On the other hand, third, only one filter can be cleaned at a time, and two filters cannot be backwashed at the same time. The backwashing efficiency is low, and the irrigation efficiency is low. Summary of the invention

[0003] In order to solve the technical problems in the prior art that agricultural irrigation filtration systems occupy a large area, have low backwashing efficiency and are easily blocked by viscous liquids, the present invention provides a double-chamber three-stage filtration system.

[0004] In order to solve the above technical problems, the present invention provides a double-chamber three-stage filtration system, including: a first filter device and a second filter device, which have the same structure and are symmetrically arranged, and both include: a tank body, which is cylindrical, with a first sand and gravel filter chamber and a second sand and gravel filter chamber symmetrically arranged on the upper part, a primary water filter chamber arranged in the middle, and a third water filter chamber arranged longitudinally along the central axis at the lower part, a mesh filter chamber is formed between the side wall of the third water filter chamber and the lower side wall of the tank body, a plurality of mesh filter cartridges are evenly arranged along the circumference of the same horizontal plane in the mesh filter chamber, a secondary water filter chamber is formed in the mesh filter cartridge, and a laminated filter chamber is arranged in the secondary water filter chamber Filter element; the top of the primary water filter chamber is connected with the bottom of the first sand and gravel filter chamber and the bottom of the second sand and gravel filter chamber, and the side is connected with the side of the mesh filter chamber through the first water filter pipe and the second water filter pipe; the secondary water filter chamber is connected with the mesh filter chamber through the side of the mesh filter cartridge, and the laminated filter element is provided with a water outlet near the inner end of the tertiary water filter chamber, and is connected with the tertiary water filter chamber through a pipeline; a drain outlet is provided at the bottom of the tertiary water filter chamber; one end of the first water filter pipe is connected with the side of the primary water filter chamber, and the other end is connected with one end of the second water filter pipe, and the other end of the second water filter pipe is connected with the side of the mesh filter chamber;

[0005] The water inlet pipe and the first sewage discharge pipe are arranged in parallel, and the side surfaces of one end are respectively connected to the two water inlets of the first filter device through the first backwash control valve and the second backwash control valve, and the side surfaces of the other end are respectively connected to the two water inlets of the second filter device through the third backwash control valve and the fourth backwash control valve;

[0006] An intermediate sewage pipe, one end of which is connected to the side of the first filter pipe and the second filter pipe of the first filter device through the fifth backwash control valve, and the other end of which is connected to the side of the first filter pipe and the second filter pipe of the second filter device through the sixth backwash control valve;

[0007] A second sewage pipe, one end of which is connected to the side of the intermediate sewage pipe;

[0008] A drainage pipe, one end of which is sealed, is arranged below the first filter device and the second filter device, and the side thereof is connected to the drainage port of the first filter device and the drainage port of the second filter device through the pipe respectively;

[0009] The first backwash control valve, the second backwash control valve, the third backwash control valve, the fourth backwash control valve, the fifth backwash control valve and the sixth backwash control valve are all three-way solenoid valves.

[0010] Compared with the prior art arrangement of a sand and gravel filter monomer and a laminate filter monomer connected in series, the present invention arranges two sand and gravel filter chambers at the upper part of the tank body and a mesh filter cartridge and a laminate filter core at the lower part, thereby achieving arrangements of the sand and gravel filter, the mesh filter cartridge and the laminate filter core in the same tank body of the filtering device. During filtration, water is first filtered through the sand and gravel filter, then through the mesh filter, and finally through the laminate filter.

[0011] In this way, firstly, the problem of large floor space occupied by one sand filter unit and one laminated filter unit is eliminated, the floor space is reduced, and the construction cost is reduced;

[0012] Second, compared with the prior art which can only backwash one sand filter unit or one laminated filter unit at a time, the present invention can simultaneously flush the sand filter and the mesh filter cartridge and the laminated filter element, thereby improving the backwashing efficiency and irrigation efficiency;

[0013] Third, because the water is first filtered through the mesh filter cartridge and then enters the laminated filter element for filtration, the mesh filter cartridge first intercepts the viscous impurities and larger particle impurities on its surface, and the viscous impurities will not enter the laminated filter element. On the one hand, the laminated filter element is not easily blocked, which improves the filtration accuracy of the laminated filter element and thus improves the quality of the filtered water. On the other hand, because the backwashing method of the mesh filter cartridge and the laminated filter element is different, the viscous impurities and large particle impurities attached to the side of the mesh filter cartridge can be easily taken away by the water coming out of the laminated filter element during backwashing, which improves the overall backwashing effect of the system and the life of the system.

[0014] Fourth, in the prior art, each sand filter unit and laminated filter unit needs to be equipped with a set of backwash valves, but the present invention integrates these together, thus saving the number of backwash valves and simplifying the structure of the backwash system;

[0015] Fifth, compared with the prior art, by integrating the sand filter, the mesh filter cartridge and the laminated filter element into one tank, the flow rate per unit area is increased and the irrigation efficiency is improved.

[0016] Preferably, the first filter device and the second filter device further include: a first sand filter and a second sand filter, which are respectively arranged in the first sand filter chamber and the second sand filter chamber.

[0017] Preferably, the first sand filter and the second sand filter both include: a water separator, arranged at the top water inlet; a sand bed, arranged in the middle; a filter cap frame, arranged at the bottom; and a filter cap, arranged on the filter cap frame.

[0018] Preferably, the third-stage water filtering chamber is cylindrical, with the top close to the bottom surface of the first-stage water filtering chamber and sealed.

[0019] Preferably, the mesh filter cartridge has a mesh-shaped side surface, and the outer end is sealed by a flange and extends to the outside of the side wall of the tank body; the laminated filter element has an outer end that is suspended in the air, and the side surface of the inner end is fixedly connected to the inner side surface of the mesh filter cartridge by a fixing ring, and a water outlet is provided at the end of the inner end.

[0020] Preferably, the filtration accuracy of the mesh filter cartridge is 50 meshes.

[0021] Preferably, the number of the mesh filter cartridges is set according to the flow rate.

[0022] Preferably, the first filter device and the second filter device further include: legs fixedly arranged on the bottom of the tank body.

[0023] The beneficial effects of the present invention include:

[0024] Compared with the prior art, the present invention integrates the sand filter, mesh filter cartridge and laminated filter element into one tank, which saves the number of backwash valves, simplifies the system structure, improves the filtered water quality, improves the backwash effect and efficiency, system life and irrigation efficiency, reduces the floor space and reduces the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In the attached picture:

[0026] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0027] Figure 2 for Figure 1 Cross-section of the middle AA;

[0028] Figure 3 for Figure 1 Left view of

[0029] Figure 4 It is a detailed structural diagram of the mesh filter cartridge and the laminated filter element.

[0030] Explanation of the reference numerals: 1 first filter device; 2 second filter device; 10 tank body; 110 first sand and gravel filter chamber; 111 second sand and gravel filter chamber; 112 water distributor; 113 sand bed; 114 filter cap frame; 115 filter cap; 116 water inlet; 12 primary filter chamber; 13 secondary filter chamber; 14 tertiary filter chamber; 140 drain outlet; 150 mesh filter chamber; 151 mesh filter cartridge; 152 flange; 16 laminated filter element; 160 water outlet; 161 fixing ring; 17 first filter pipe; 18 second filter pipe; 19 leg; 3 water inlet pipe; 4 first sewage pipe; 5 intermediate sewage pipe; 6 second sewage pipe; 7 drain pipe; 80 first backwash control valve; 81 second backwash control valve; 82 third backwash control valve; 83 fourth backwash control valve; 84 fifth backwash control valve; 85 sixth backwash control valve. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below using specific embodiments in conjunction with the accompanying drawings.

[0032] As shown in the figure, a double-chamber three-stage filtration system provided by a specific embodiment of the present invention includes: a first filter device 1 and a second filter device 2, which have the same structure and are symmetrically arranged, and both include: a tank body 10, which is cylindrical, with a first sand and gravel filter chamber 110 and a second sand and gravel filter chamber 111 symmetrically arranged on the upper part, a primary water filter chamber 12 arranged in the middle, and a third water filter chamber 14 arranged longitudinally along the central axis at the lower part, a mesh filter chamber 150 is formed between the side wall of the third water filter chamber 14 and the lower side wall of the tank body 10, and 5 mesh filter cartridges 151 are evenly arranged in the mesh filter chamber 150 along the circumference of the same horizontal plane, a secondary water filter chamber 13 is formed in the mesh filter cartridge 151, and a laminated filter core 16 is arranged in the secondary water filter chamber 13; a primary filter The top of the water chamber 12 is connected to the bottom of the first sand and gravel filter chamber 110 and the bottom of the second sand and gravel filter chamber 111, and the side is connected to the side of the mesh filter chamber 150 through the first water filter pipe 17 and the second water filter pipe 18; the secondary water filter chamber 13 is connected to the mesh filter chamber 150 through the side of the mesh filter cartridge 151, and the laminated filter core 16 is provided with a water outlet 160 near the inner end of the tertiary water filter chamber 14, and is connected to the tertiary water filter chamber 14 through a pipeline; a drain port 140 is provided at the bottom of the tertiary water filter chamber 14; one end of the first water filter pipe 17 is connected to the side of the primary water filter chamber 12, and the other end is connected to one end of the second water filter pipe 18, and the other end of the second water filter pipe 18 is connected to the side of the mesh filter chamber 150;

[0033] The water inlet pipe 3 and the first sewage pipe 4 are arranged in parallel, and the side surfaces of one end are respectively connected to the two water inlets 116 of the first filter device 1 through the first backwash control valve 80 and the second backwash control valve 81, and the side surfaces of the other end are respectively connected to the two water inlets 116 of the second filter device 2 through the third backwash control valve 82 and the fourth backwash control valve 83;

[0034] The intermediate sewage pipe 5 has one end connected to the side of the first filter pipe 17 and the second filter pipe 18 of the first filter device 1 through the fifth backwash control valve 84, and the other end connected to the side of the first filter pipe 17 and the second filter pipe 18 of the second filter device 2 through the sixth backwash control valve 85;

[0035] A second sewage pipe 6, one end of which is connected to the side of the intermediate sewage pipe 5;

[0036] A drainage pipe 7, one end of which is sealed, is disposed below the first filter device 1 and the second filter device 2, and the side thereof is connected to the drainage port 140 of the first filter device 1 and the drainage port 140 of the second filter device 2 through pipes;

[0037] The first backwash control valve 80 , the second backwash control valve 81 , the third backwash control valve 82 , the third backwash control valve 83 , the fourth backwash control valve 84 , the fifth backwash control valve 85 and the sixth backwash control valve 86 are all three-way solenoid valves.

[0038] Preferably, the first filter device 1 and the second filter device 2 further include: a first sand filter and a second sand filter, which are respectively arranged in the first sand filter chamber 110 and the second sand filter chamber 111 .

[0039] Preferably, the first sand filter and the second sand filter both include: a water separator 112, arranged at the top water inlet 116; a sand bed 113, arranged in the middle; a filter cap frame 114, arranged at the bottom; and a filter cap 115, arranged on the filter cap frame.

[0040] Preferably, the tertiary water filtering chamber 14 is cylindrical, with the top close to the bottom surface of the primary water filtering chamber 12 and sealed.

[0041] Preferably, the mesh filter cartridge 151 has a mesh-shaped side surface, and the outer end is sealed by a flange 152 and extends to the outside of the side wall of the tank body 10; the outer end of the laminated filter element 16 is suspended in the air, and the side of the inner end is fixedly connected to the inner side surface of the mesh filter cartridge 151 through a fixing ring 161, and a water outlet 160 is provided at the end of the inner end.

[0042] Preferably, the filtering accuracy of the mesh filter cartridge 151 is 50 meshes.

[0043] Preferably, the first filter device 1 and the second filter device 2 further include: legs 19 fixedly disposed at the bottom of the tank body 10 .

[0044] The working process and principle of the present invention are as follows:

[0045] During normal use, first, the first backwash control valve and the second backwash control valve are set so that the two water inlets of the first filter device are connected to the water inlet pipe, and the third backwash control valve and the fourth backwash control valve are set so that the two water inlets of the second filter device are connected to the water inlet pipe; the fifth backwash control valve and the sixth backwash control valve are set so that the first filter pipe and the second filter pipe of the first filter device and the second filter device are kept connected, and the intermediate sewage pipe and the first filter pipe and the second filter pipe of the first filter device and the second filter device are kept disconnected;

[0046] Secondly, under the action of pressure, the water to be filtered enters the first sand and gravel filter chamber and the second sand and gravel filter chamber of the first filter device (the process of the second filter device is the same and omitted) from the water inlet pipe, and after being filtered by the first sand and gravel filter and the second sand and gravel filter, enters the primary water filter chamber, and then passes through the first water filter pipe and the second water filter pipe to enter the mesh filter chamber, and after being filtered through the side of the mesh filter cylinder, enters the secondary water filter chamber, and then enters the laminated filter element to be filtered, and then enters the tertiary water filter chamber from the water outlet through the pipe, and finally enters the drainage pipe through the drain outlet.

[0047] In the backwashing state, the first filter device is backwashed, and the second filter device works normally (or the states of the first filter device and the second filter device are reversed). The following is an example of the first filter device being backwashed:

[0048] When the first filter device is backwashed, the first sand filter and the second sand filter are backwashed alternately. At the same time, the mesh filter cartridge and the laminated filter element are backwashed at the same time as the first sand filter or the second sand filter:

[0049] First, the first backwash control valve is set so that one water inlet of the first filter device is connected to the water inlet pipe, and the second backwash control valve is set so that the other water inlet of the first filter device is connected to the first sewage pipe (the states of the first backwash control valve and the second backwash control valve are set alternately); the third backwash control valve and the fourth backwash control valve are set so that the two water inlets of the second filter device are connected to the water inlet pipe; the fifth backwash control valve is set so that the first filter pipe and the second filter pipe of the first filter device are disconnected, and the first filter pipe and the second filter pipe are both connected to the intermediate sewage pipe, that is, connected to the second sewage pipe; the sixth backwash control valve is set so that the first filter pipe and the second filter pipe of the second filter device are kept connected, and the intermediate sewage pipe and the first filter pipe and the second filter pipe of the second filter device are kept disconnected;

[0050] Secondly, on the one hand, the second gravel filter of the first filtering device works normally, the water to be filtered enters the second gravel filter from the water inlet pipe through the second backwash control valve, and enters the primary water filter chamber after filtration. Under the action of pressure, the filtered water of the primary water filter chamber enters the first gravel filter from the bottom of the first gravel filter, passes through the filter cap in the reverse direction, and the gravel on the sand bed will be driven to produce a shaking backwashing effect, and the washed sewage enters the first sewage pipe through the first backwash control valve; when the backwashing of the first gravel filter is completed, the second gravel filter is backwashed, and the states of the first backwash control valve and the second backwash control valve are reversed, so that the second gravel filter can be backwashed;

[0051] At the same time, on the other hand, the final filtered water of the second filter device which is in normal working condition, under the action of pressure, passes through the drain pipe, passes through the drain port of the first filter device, enters the third-level water filter chamber of the first filter device, and then passes through the water outlet to enter the laminated filter element, after backwashing the laminated filter element, passes through the secondary water filter chamber, backwashes the side of the mesh filter cylinder, and then enters the mesh filter chamber, and finally enters the second sewage pipe through the second water filter pipe and the intermediate sewage pipe for discharge.

[0052] In summary, compared with the prior art, the present invention integrates the sand filter, the mesh filter cartridge and the laminated filter element into a tank body, which saves the number of backwash valves, simplifies the system structure, improves the filtered water quality, improves the backwash effect and efficiency, system life and irrigation efficiency, reduces the floor space and reduces the construction cost.

[0053] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A double-chamber three-stage filtration system, characterized in that: include: The first filter device and the second filter device have the same structure and are symmetrically arranged, and both include: a tank body, which is cylindrical, with a first sand and gravel filter chamber and a second sand and gravel filter chamber symmetrically arranged on the upper part, a primary water filter chamber arranged in the middle part, and a third water filter chamber arranged longitudinally along the central axis at the lower part, a mesh filter chamber is formed between the side wall of the third water filter chamber and the lower side wall of the tank body, a plurality of mesh filter cartridges are evenly arranged along the circumference of the same horizontal plane in the mesh filter chamber, a secondary water filter chamber is formed in the mesh filter cartridge, and a laminated filter core is arranged in the secondary water filter chamber; the top of the primary water filter chamber is connected to the first sand filter chamber, and the second sand filter chamber is connected to the first sand filter chamber. The bottom of the stone filter chamber is connected to the bottom of the second sand and stone filter chamber, and the side is connected to the side of the mesh filter chamber through the first water filter pipe and the second water filter pipe; the secondary water filter chamber is connected to the mesh filter chamber through the side of the mesh filter cartridge, and the laminated filter element is provided with a water outlet near the inner end of the third water filter chamber, and is connected to the third water filter chamber through a pipeline; a drain port is provided at the bottom of the third water filter chamber; one end of the first water filter pipe is connected to the side of the first water filter chamber, and the other end is connected to one end of the second water filter pipe, and the other end of the second water filter pipe is connected to the side of the mesh filter chamber; The water inlet pipe and the first sewage discharge pipe are arranged in parallel, and the side surfaces of one end are respectively connected to the two water inlets of the first filter device through the first backwash control valve and the second backwash control valve, and the side surfaces of the other end are respectively connected to the two water inlets of the second filter device through the third backwash control valve and the fourth backwash control valve; An intermediate sewage pipe, one end of which is connected to the side of the first filter pipe and the second filter pipe of the first filter device through the fifth backwash control valve, and the other end of which is connected to the side of the first filter pipe and the second filter pipe of the second filter device through the sixth backwash control valve; A second sewage pipe, one end of which is connected to the side of the intermediate sewage pipe; A drainage pipe, one end of which is sealed, is arranged below the first filter device and the second filter device, and the side thereof is connected to the drainage port of the first filter device and the drainage port of the second filter device through the pipe respectively; The first backwash control valve, the second backwash control valve, the third backwash control valve, the fourth backwash control valve, the fifth backwash control valve and the sixth backwash control valve are all three-way solenoid valves.

2. A double-chamber three-stage filtration system as claimed in claim 1, characterized in that: The first filter device and the second filter device also include: a first sand filter and a second sand filter, which are respectively arranged in the first sand filter chamber and the second sand filter chamber.

3. A double-chamber three-stage filtration system as claimed in claim 2, characterized in that: The first sand filter and the second sand filter both include: a water divider arranged at the top water inlet; a sand bed arranged in the middle; a filter cap frame arranged at the bottom; and a filter cap arranged on the filter cap frame.

4. A double-chamber three-stage filtration system as claimed in claim 1, characterized in that: The third-stage water filtering chamber is cylindrical, and the top thereof is close to the bottom surface of the first-stage water filtering chamber and is sealed.

5. The double-chamber three-stage filtration system according to claim 1, characterized in that: The mesh filter cartridge has a mesh-shaped side surface, and the outer end is sealed by a flange and extends to the outside of the tank side wall; the laminated filter element has an outer end suspended in the air, and the side surface of the inner end is fixedly connected to the inner side surface of the mesh filter cartridge through a fixing ring, and a water outlet is arranged at the end of the inner end.

6. The double-chamber three-stage filtration system according to claim 1, characterized in that: The filtering accuracy of the mesh filter cartridge is 50 meshes.

7. The double-chamber three-stage filtration system according to claim 1, characterized in that: The number of the mesh filter cartridges is set according to the flow rate.

8. The double-chamber three-stage filtration system according to claim 1, characterized in that: The first filter device and the second filter device also include: legs fixedly arranged at the bottom of the tank body.

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