Backwash filter

Abstract

The utility model relates to the technical field of chemical reaction equipment, and provides a backwashing filter which comprises a filter shell, a filter part and a motor, and in the backflushing mode, the switching valves of the liquid inlet pipe and the liquid outlet pipe are both in a closed state, and the backflushing pipe and the first blow-off pipe are both in an open state. Liquid enters the filter shell from the back-flushing pipe, enters the filter cartridge from the outside of the filter cartridge, and is finally discharged from the first blow-off pipe. Meanwhile, the motor is in a starting state and drives the filter cartridge to rotate around the axis of the liquid inlet pipe, so that the periphery of the filter cartridge passes through the back-flushing pipe by 360 degrees and is effectively flushed, filter residues in the filter cartridge are ensured to turn up and down along with rotation, the flushed filter residues are prevented from depositing at the bottom, and the back-flushing effect is improved. Besides, the backwashing effect is improved by rotating the filter cartridge, structures such as a sweeping rod do not need to be added in the filter cartridge, the occupied space in the filter cartridge is reduced, the abrasion of the filter cartridge is reduced, and the space utilization rate and the service life of the equipment are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical reaction equipment, in particular to a backwashing filter. Background Art

[0002] Backwash filter refers to the equipment used for filtering industrial water, seawater, light chemical industry wastewater such as food and pharmaceutical, circulating water, as well as emulsion regeneration, waste oil, liquid raw materials, etc. Its own structural design can backwash the internal filter components to eliminate the filter residue hanging on the wall after long-term use, ensuring that the filter components can be reused.

[0003] In the existing document (application number 202420040325.1), a backwash filter that is easy to maintain is provided, which uses the valve plate between the front filter cartridge and the rear filter cartridge to change the flow direction of the liquid. During backwashing, the liquid is controlled to enter the rear filter cartridge from the outside; at the same time, the cleaning motor is started to drive the sweeping rod to rotate around the rotating shaft in the rear filter cartridge to scrape off the filter residue hanging on the wall, thereby achieving the purpose of cleaning the rear filter cartridge.

[0004] However, in the above scheme, since the rotating shaft, sweeping rod and other structures are set in the rear filter cartridge, part of the filtering space in the rear filter cartridge is occupied, which reduces the filtering efficiency. At the same time, in order to scrape the filter residue on the inner wall of the rear filter cartridge, the sweeping rod needs to contact the inner wall of the rear filter cartridge and scrape the filter residue off by relative friction. After long-term use, it is easy to cause serious wear of the rear filter cartridge and reduce the service life of the equipment. In addition, part of the scraped large particle filter residue will be deposited on the bottom wall of the rear filter cartridge due to its own gravity, affecting the backwashing effect. Utility Model Content

[0005] Based on the above background, the purpose of the utility model is to provide a backwash filter, which reduces the impact on the filtration space occupied and improves the filtration effect; at the same time, during the backwash process, it reduces the wear on the components and improves the backwash effect.

[0006] In order to achieve the above objectives, the utility model adopts the following technical solutions:

[0007] A backwash filter comprises: a filter shell, on which are provided a liquid inlet pipe, a liquid discharge pipe and a backwash pipe, each of which has a switch valve, the liquid inlet pipe partially extending into the interior of the filter shell; a filter component, located in the interior of the filter shell, and comprising a first sealing plate and a second sealing plate spaced in parallel, a filter cartridge connected between the first sealing plate and the second sealing plate, and a first drain pipe provided on the second sealing plate and having a switch valve, the first sealing plate being rotatably sleeved on the liquid inlet pipe, the first drain pipe being rotatably passed through the outside of the filter shell, the liquid inlet pipe and the first drain pipe being both connected to the interior of the filter cartridge, and the backwash pipe and the drain pipe being both located outside the filter cartridge; a motor, located outside the filter shell and drivingly connected to the first drain pipe, for driving the filter component to rotate around the axis of the liquid inlet pipe.

[0008] Furthermore, the backwash filter further comprises a filter plate, wherein the filter plate is located between the backwash pipe and the filter component and covers the outside of the filter cartridge.

[0009] Furthermore, the filter plate includes a first support bar, a second support bar and a filter screen connected between the first support bar and the second support bar, the filter screen covers the outside of the filter cartridge, and the first support bar and the second support bar are respectively slidably mounted on the first sealing plate and the second sealing plate.

[0010] Furthermore, an annular groove is provided on the circumferential side surfaces of the first sealing plate and the second sealing plate, and a limiting protrusion is provided on the first supporting bar and the second supporting bar, and the limiting protrusion is inserted into the annular groove.

[0011] Furthermore, the filter shell also includes a first shell and a second shell that cooperate with each other, the liquid inlet pipe is arranged between the first shell and the second shell, the liquid discharge pipe is arranged in the second shell, and the backwash pipe is arranged in the first shell; the filter component is located in the second shell, the filter plate is located between the first shell and the filter component, and the filter plate covers the outside of the filter cartridge and is crimped onto the second shell.

[0012] Furthermore, the first shell is also provided with a second sewage pipe having the switch valve, an auxiliary flushing space is formed between the filter plate and the first shell, and the second sewage pipe is communicated with the auxiliary flushing space.

[0013] Furthermore, the second shell has a mating surface facing the first shell and located on both sides of the filter component, and the mating surface is provided with a groove, and the filter plate is provided with pressure strips on opposite sides, and the two pressure strips are respectively correspondingly inserted into the grooves, and the first shell is crimped onto the pressure strips.

[0014] Furthermore, a roller is sleeved on the first sewage pipe, the motor is fixed on the filter shell, and a transmission belt is sleeved between the output shaft of the motor and the roller.

[0015] The utility model has the following beneficial effects:

[0016] (1) When the backwash filter is in the filtering mode, the switch valves of the liquid inlet pipe and the liquid discharge pipe are both in the open state, and the backwash pipe and the first sewage discharge pipe are both in the closed state; when the backwash filter is in the backwash mode, the switch valves of the liquid inlet pipe and the liquid discharge pipe are both in the closed state, and the backwash pipe and the first sewage discharge pipe are both in the open state. In the backwash mode, the liquid enters the filter shell from the backwash pipe, enters the inside of the filter cartridge from the outside, and is finally discharged from the first sewage discharge pipe. At the same time, the motor is in the starting state, driving the filter cartridge to rotate around the axis of the liquid inlet pipe, so that the outer periphery of the filter cartridge passes through the backwash pipe 360° and is effectively flushed, ensuring that the filter residue in the filter cartridge is tumbled up and down with the rotation, avoiding the washed filter residue from being deposited at the bottom, and improving the backwashing effect. In addition, by rotating the filter cartridge, the backwashing effect is increased, and there is no need to add a sweeping rod or other structures inside the filter cartridge, which not only reduces the space occupied inside the filter cartridge, but also reduces the wear on the filter cartridge, which is conducive to improving the space utilization and service life of the equipment.

[0017] (2) A filter plate is arranged between the filter cartridge and the backwash pipe so that the backwash liquid is filtered by the filter plate before reaching the filter cartridge, so that the liquid on the side of the filter plate facing the filter cartridge is clean liquid. This not only prevents the filter residue in the backwash liquid from re-attaching to the outer surface of the filter cartridge; but also the filtered backwash liquid can be directly discharged from the drain pipe in the filtering mode without affecting the product quality.

[0018] (3) Annular grooves are respectively provided on the first sealing plate and the second sealing plate, and corresponding limiting protrusions are respectively provided on the first supporting bar and the second supporting bar. Through the cooperation of the limiting protrusions and the annular grooves, not only the filter plate is stably installed in the filter shell, but also the filter component can be smoothly rotated around the axis of the liquid inlet pipe, thereby ensuring the smooth backwashing operation.

[0019] (4) By utilizing the auxiliary flushing space formed between the filter plate and the first shell, the second sewage pipe can be opened in the filtering mode of the backwash filter, so that part of the liquid filtered by the filter cartridge can pass through the filter plate in the reverse direction to backwash the filter plate; the flushed liquid and filter residue enter the second sewage pipe through the auxiliary flushing space and are finally discharged outwardly therefrom, so as to achieve the dual effect of filtering and backwashing the filter plate at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A perspective view of a backwash filter structure according to an embodiment;

[0022] Figure 2 Another perspective view of the backwash filter structure described in one embodiment;

[0023] Figure 3 An exploded view of a backwash filter structure according to an embodiment;

[0024] Figure 4 A cross-sectional view of a backwash filter structure in one embodiment;

[0025] Figure 5 A diagram showing the matching structure of the filter component and the second shell in one embodiment;

[0026] Figure 6 A structural diagram of a filter plate described in an embodiment.

[0027] Description of Figure Numbers:

[0028] 100 is a backwash filter; 10 is a filter shell; 11 is a liquid inlet pipe; 111 is an axis; 12 is a liquid discharge pipe; 13 is a backwash pipe; 14 is a second sewage discharge pipe; 15 is a first shell; 16 is a second shell; 161 is a groove; 162 is a matching surface; 20 is a filter component; 21 is a first sealing plate; 22 is a second sealing plate; 23 is a filter cartridge; 24 is an annular groove; 25 is a first sewage discharge pipe; 251 is a roller; 30 is a filter plate; 31 is a first support bar; 32 is a second support bar; 33 is a limiting protrusion; 34 is a pressure strip; 35 is an auxiliary flushing space; 36 is a filter screen; 40 is a motor; 41 is a transmission belt.

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] In one embodiment, please refer to Figures 1 to 6 The present application provides a backwash filter 100, comprising: a filter shell 10, on which is provided a liquid inlet pipe 11, a liquid discharge pipe 12 and a backwash pipe 13, each of which has an on-off valve, the liquid inlet pipe 11 partially extends into the interior of the filter shell 10; a filter component 20, located in the interior of the filter shell 10, and comprising a first sealing plate 21 and a second sealing plate 22 spaced in parallel, a filter cartridge 23 connected between the first sealing plate 21 and the second sealing plate 22, and a first sewage discharge pipe 25 provided on the second sealing plate 22 and having an on-off valve, the first sealing plate 21 being rotatably sleeved on the liquid inlet pipe 11, the first sewage discharge pipe 25 being rotatably passed through the outside of the filter shell 10, the liquid inlet pipe 11 and the first sewage discharge pipe 25 being both connected to the interior of the filter cartridge 23, and the backwash pipe 13 and the sewage discharge pipe 12 being both located outside the filter cartridge 23; a motor 40, located outside the filter shell 10, and drivingly connected to the first sewage discharge pipe 25, for driving the filter component 20 to rotate around the axis 111 of the liquid inlet pipe 11.

[0034] In the above-mentioned backwash filter 100, when the backwash filter 100 is in the filtering mode, the switch valves of the liquid inlet pipe 11 and the liquid discharge pipe 12 are both in the open state, and the backwash pipe 13 and the first sewage pipe 25 are both in the closed state; when the backwash filter 100 is in the backwash mode, the switch valves of the liquid inlet pipe 11 and the liquid discharge pipe 12 are both in the closed state, and the backwash pipe 13 and the first sewage pipe 25 are both in the open state. In the backwash mode, the liquid enters the filter shell 10 from the backwash pipe 13, and enters the inside of the filter cartridge 23 from the outside, and finally is discharged from the first sewage pipe 25. At the same time, the motor 40 is in the starting state, driving the filter cartridge 23 to rotate around the axis 111 of the liquid inlet pipe 11, so that the outer periphery of the filter cartridge 23 passes through the backwash pipe 13 for 360 degrees, and is effectively flushed, ensuring that the filter residue in the filter cartridge 23 is tumbled up and down with the rotation, avoiding the washed filter residue from being deposited at the bottom, and improving the backwashing effect. In addition, the backwashing effect is increased by rotating the filter cartridge 23, and there is no need to add structures such as sweeping rods inside the filter cartridge 23. This not only reduces the space occupied inside the filter cartridge 23, but also reduces the wear on the filter cartridge 23, which is beneficial to improving the space utilization and service life of the equipment.

[0035] It should be explained that the first sewage pipe 25, the liquid inlet pipe 11, the liquid discharge pipe 12 and the backwash pipe 13 are all provided with a switch valve (not shown), which can play the role of opening or closing each pipe. The type of the switch valve can be a gate valve, a ball valve, a solenoid valve, etc., and there are many options, which are not specifically limited here. Since the first sewage pipe 25 in this embodiment serves as a pipe for discharging sewage and as a rotation support for one end of the filter component 20 on the filter shell 10, the first sewage pipe 25 will rotate with the filter component 20. Therefore, if the discharge path of the first sewage pipe 25 is to be extended, the hose can be fixed to the first sewage pipe 25 through a rotatable joint to prevent the hose from rotating with the first sewage pipe 25.

[0036] At the same time, in order to ensure that the filter component 20 rotates more smoothly on the filter housing 10, a bearing can be provided on the portion where the liquid inlet pipe 11 extends into the filter housing 10, and a bearing can be provided at a position of the filter housing 10 close to the first sewage discharge pipe 25. In this way, the first sealing plate 21 is sleeved on the outer ring of one of the bearings; and the first sewage discharge pipe 25 is fixed in the inner ring of the other bearing.

[0037] In addition, to ensure the sealing inside the filter housing 10 , sealing rubber rings may be provided between the first sealing plate 21 and the liquid inlet pipe 11 , and between the second sealing plate 22 and the inner wall of the filter housing 10 .

[0038] For further information, please refer to Figure 3 and Figure 4The backwash filter 100 further includes a filter plate 30, which is located between the backwash pipe 13 and the filter component 20 and covers the outside of the filter cartridge 23. It can be seen that the filter plate 30 is arranged between the filter cartridge 23 and the backwash pipe 13, so that the backwash liquid is filtered by the filter plate 30 before reaching the filter cartridge 23, so that the liquid on the side of the filter plate 30 facing the filter cartridge 23 is clean liquid, which not only prevents the filter residue in the backwash liquid from reattaching to the outer surface of the filter cartridge 23; but also the filtered backwash liquid can be directly discharged from the drain pipe 12 in the filtering mode, without affecting the product quality.

[0039] It should be explained that the filter plate 30 covers the filter cartridge 23. Since the filter cartridge 23 is cylindrical, the filter plate 30 can also be appropriately designed into a semi-cylindrical structure according to the shape of the filter cartridge 23 so as to better cover the outside of the filter cartridge 23.

[0040] For further information, please refer to Figure 3 and Figure 6 The filter plate 30 includes a first support bar 31, a second support bar 32, and a filter screen 36 connected between the first support bar 31 and the second support bar 32. The filter screen 36 covers the outside of the filter cartridge 23. The first support bar 31 and the second support bar 32 are respectively slidably sleeved on the first sealing plate 21 and the second sealing plate 22. It can be seen that the first support bar 31 and the second support bar 32 constitute the main supporting structure of the filter plate 30, improve the overall structural strength of the filter plate 30, and ensure its stable operation.

[0041] In one embodiment, please refer to Figure 5 and Figure 6 , an annular groove 24 is provided on the circumferential side surface of the first sealing plate 21 and the second sealing plate 22, and a limiting protrusion 33 is provided on the first supporting bar 31 and the second supporting bar 32, and the limiting protrusion 33 is inserted into the annular groove 24. It can be seen that the annular groove 24 is provided on the first sealing plate 21 and the second sealing plate 22, and the corresponding limiting protrusions 33 are provided on the first supporting bar 31 and the second supporting bar 32, respectively. Through the cooperation of the limiting protrusion 33 and the annular groove 24, not only the filter plate 30 is stably installed in the filter housing 10, but also the filter component 20 can be smoothly rotated around the axis 111 of the liquid inlet pipe 11, so as to ensure the smooth backwashing operation.

[0042] Among them, in order to ensure that the first support bar 31 and the second support bar 32 are stably installed on the first sealing plate 21 and the second sealing plate 22 respectively, the limiting protrusions 33 of the first support bar 31 and the second support bar 32 can be designed as a semicircular structure, that is, the limiting protrusions 33 are extended along the length direction of the first support bar 31 or the second support bar 32.

[0043] In one embodiment, please refer to Figure 1 and Figure 4The filter shell 10 also includes a first shell 15 and a second shell 16 that cooperate with each other, the liquid inlet pipe 11 is arranged between the first shell 15 and the second shell 16, the liquid discharge pipe 12 is arranged in the second shell 16, and the backwash pipe 13 is arranged in the first shell 15; the filter component 20 is located in the second shell 16, the filter plate 30 is located between the first shell 15 and the filter component 20, and the filter plate 30 covers the outside of the filter cartridge 23 and is crimped on the second shell 16.

[0044] For further information, please refer to Figure 4 The first shell 15 is also provided with a second sewage pipe 14 having a switch valve. An auxiliary flushing space 35 is formed between the filter plate 30 and the first shell 15 , and the second sewage pipe 14 is connected to the auxiliary flushing space 35 .

[0045] It can be seen that by forming an auxiliary flushing space 35 between the filter plate 30 and the first shell 15, the backwash filter 100 can open the second drain pipe 14 in the filtering mode, so that part of the liquid filtered by the filter cartridge 23 can pass through the filter plate 30 in reverse to backwash the filter plate 30; the flushed liquid and filter residue enter the second drain pipe 14 from the auxiliary flushing space 35, and are finally discharged outwardly therefrom, so as to achieve the dual effect of filtering and backwashing the filter plate 30 at the same time.

[0046] Optionally, the first shell 15 and the second shell 16 are detachably connected to facilitate maintenance of the backwash filter 100. At the same time, there are many ways of connection between the two, such as bolt connection, clamping connection, pin connection, etc.

[0047] For further information, please refer to Figure 5 and Figure 6 , the second shell 16 has a mating surface 162 facing the first shell 15 and located on both sides of the filter component 20, and a groove 161 is provided on the mating surface 162, and pressure strips 34 are respectively provided on opposite sides of the filter plate 30, and the two pressure strips 34 are respectively correspondingly inserted into the grooves 161, and the first shell 15 is pressed on the pressure strips 34. In this way, the filter plate 30 is more stably fixed on the second shell 16 through the grooves 161; at the same time, the pressure strips 34 are inserted into the grooves 161, so that when the first shell 15 is pressed on the pressure strips 34, the filter plate 30 can be stably fixed on the second shell 16; and no gap will appear between the first shell 15 and the second shell 16 due to the addition of the filter plate 30.

[0048] In one embodiment, please refer to Figure 2 , a roller 251 is sleeved on the first sewage pipe 25, the motor 40 is fixed on the filter housing 10, and a transmission belt 41 is sleeved between the output shaft of the motor 40 and the roller 251. It can be seen that in the backwash mode, the motor 40 drives the first sewage pipe 25 to rotate through the transmission belt 41, thereby driving the filter cartridge 23 to rotate around the axis 111 of the liquid inlet pipe 11.

[0049] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A backwash filter, characterized in that: include: A filter housing (10) is provided with a liquid inlet pipe (11), a liquid discharge pipe (12) and a backwash pipe (13), each of which has an on-off valve, wherein a portion of the liquid inlet pipe (11) extends into the interior of the filter housing (10); A filter component (20) is located inside the filter housing (10), and comprises a first sealing plate (21) and a second sealing plate (22) spaced apart from each other in parallel, a filter cartridge (23) connected between the first sealing plate (21) and the second sealing plate (22), and a first sewage discharge pipe (25) provided on the second sealing plate (22) and having an on-off valve, wherein the first sealing plate (21) is rotatably sleeved on the liquid inlet pipe (11), the first sewage discharge pipe (25) is rotatably passed through the outside of the filter housing (10), the liquid inlet pipe (11) and the first sewage discharge pipe (25) are both connected to the inside of the filter cartridge (23), and the backwash pipe (13) and the sewage discharge pipe (12) are both located outside the filter cartridge (23); The motor (40) is located outside the filter housing (10) and is drivingly connected to the first sewage discharge pipe (25) for driving the filter component (20) to rotate around the axis (111) of the liquid inlet pipe (11).

2. The backwash filter according to claim 1, characterized in that: The backwash filter further comprises a filter plate (30), wherein the filter plate (30) is located between the backwash pipe (13) and the filter component (20) and covers the outside of the filter cartridge (23).

3. The backwash filter according to claim 2, characterized in that: The filter plate (30) comprises a first support bar (31), a second support bar (32) and a filter screen (36) connected between the first support bar (31) and the second support bar (32); the filter screen (36) covers the outside of the filter cartridge (23); the first support bar (31) and the second support bar (32) are slidably sleeved on the first sealing plate (21) and the second sealing plate (22) respectively.

4. The backwash filter according to claim 3, characterized in that: The first sealing plate (21) and the second sealing plate (22) are both provided with an annular groove (24) on their circumferential side surfaces, and the first supporting strip (31) and the second supporting strip (32) are both provided with a limiting protrusion (33), and the limiting protrusion (33) is inserted into the annular groove (24).

5. The backwash filter according to claim 2, characterized in that: The filter shell (10) further comprises a first shell (15) and a second shell (16) which cooperate with each other, the liquid inlet pipe (11) is arranged between the first shell (15) and the second shell (16), the liquid discharge pipe (12) is arranged in the second shell (16), and the backwash pipe (13) is arranged in the first shell (15); the filter component (20) is located in the second shell (16), the filter plate (30) is located between the first shell (15) and the filter component (20), and the filter plate (30) covers the outside of the filter cartridge (23) and is crimped onto the second shell (16).

6. The backwash filter according to claim 5, characterized in that: The first shell (15) is also provided with a second sewage pipe (14) having the switch valve, an auxiliary flushing space (35) is formed between the filter plate (30) and the first shell (15), and the second sewage pipe (14) is in communication with the auxiliary flushing space (35).

7. The backwash filter according to claim 5, characterized in that: The second shell (16) has a mating surface (162) facing the first shell (15) and located on both sides of the filter component (20), and a groove (161) is provided on the mating surface (162). The filter plate (30) has pressure strips (34) on opposite sides, and the two pressure strips (34) are respectively inserted into the grooves (161), and the first shell (15) is pressed onto the pressure strips (34).

8. The backwash filter according to any one of claims 1 to 7, characterized in that: A roller (251) is sleeved on the first sewage discharge pipe (25), the motor (40) is fixed on the filter housing (10), and a transmission belt (41) is sleeved between the output shaft of the motor (40) and the roller (251).

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