Filtering system with backwashing function

Abstract

The utility model relates to a filtering system with a backflushing function in the technical field of filtering, which is characterized in that a filter with a filter screen is arranged in the filtering system, a feed port is arranged on the side wall of the filter below the filter screen, a discharge port is arranged on the side wall of the filter above the filter screen, and a slag discharge port is arranged at the bottom of the filter. A back-flushing opening is formed in the top of the filter; the inner end of the feeding pipeline is correspondingly communicated with the feeding port, and the feeding pipeline is sequentially provided with a first feeding valve, a conveying pump and a second feeding valve from outside to inside; the inner end of the discharging pipeline is correspondingly communicated with the discharging opening, and the discharging pipeline is provided with a discharging valve; during filtering operation and backflushing operation, the conveying pump does not need to be started and stopped, so that frequent starting and stopping actions of the conveying pump are avoided, and the water hammer phenomenon of the conveying pump is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration, in particular to a filtration system with a backwashing cleaning function. Background Art

[0002] The existing liquid feed contains particulate impurities, which can easily cause serious blockage after entering the next process. Therefore, a filter must be installed before entering the next process. After the filter is installed, the particulate impurities are retained in the filter. After a period of time, the filter is blocked and production needs to be stopped. The filter must be disassembled and the filter screen removed for cleaning. This not only requires a large workload but also requires a long shutdown time, which has a serious impact on production.

[0003] The existing backwashing filtration system generally includes a filter, a feed pipeline (with a control valve and a delivery pump), a discharge pipeline (with a valve), a backwashing pipeline (with a control valve and a delivery pump) and a slag discharge pipeline (with a control valve). In this way, the backwashing filtration system requires two delivery pumps, and during backwashing, the delivery pump on the feed pipeline needs to be shut down before the delivery pump on the backwashing pipeline can be started; similarly, after the backwashing is completed, the delivery pump on the backwashing pipeline needs to be shut down before the delivery pump on the feed pipeline can be started. Although this method solves the above defects, water hammer will occur when the delivery pump is started (this phenomenon is one of the main reasons for the damage of the delivery pump), and the existence of two delivery pumps restricts the reduction of costs.

[0004] For this reason, we have designed a filtration system with backwash cleaning capability using only one delivery pump. Utility Model Content

[0005] In order to overcome the deficiencies in the background technology, the utility model discloses a filtering system with a backwashing cleaning function.

[0006] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0007] A filtering system with a backwashing cleaning function, a filter with a filter screen inside, a side wall of the filter having a feed inlet at a position below the filter screen, a side wall of the filter having a discharge port at a position above the filter screen, a bottom of the filter having a slag discharge port, and a top of the filter having a backwashing port; and further comprising:

[0008] A feed pipeline, the inner end of which is connected to the feed port, and the feed pipeline has a first feed valve, a delivery pump and a second feed valve in sequence from the outside to the inside;

[0009] A discharge pipeline, the inner end of which is correspondingly connected to the discharge port, and the discharge pipeline is provided with a discharge valve;

[0010] A backflush pipeline, the inner end of which is connected to the backflush port, and the outer end of which is connected to the position of the feed pipeline between the delivery pump and the second feed valve, wherein the backflush pipeline has a first backflush valve;

[0011] A slag discharge pipeline, the inner end of which is correspondingly connected to the slag discharge port, and the slag discharge pipeline has a slag discharge valve;

[0012] The liquid storage pipeline has an inner end corresponding to the discharge port and an outer end corresponding to the position of the feed pipeline located between the first feed valve and the delivery pump. The liquid storage pipeline is provided with a first liquid storage valve, a liquid storage tank and a liquid discharge valve from the inside to the outside.

[0013] Preferably, the liquid storage pipeline is provided with a second liquid storage valve at a position between the first liquid storage valve and the liquid storage tank, the recoil pipeline is provided with a second recoil valve at a position between the first recoil valve and the outer end of the recoil pipeline, and the recoil pipeline at a position between the first recoil valve and the second recoil valve shares a pipeline with the liquid storage pipeline at a position between the first liquid storage valve and the second liquid storage valve.

[0014] Preferably, the filter has an inverted first conical portion at the bottom, and the lower end of the first conical portion has the slag discharge port.

[0015] Preferably, the bottom of the filter is located below the first conical portion and is spaced apart from an inverted second conical portion, and the lower end of the second conical portion has the slag discharge port.

[0016] Preferably, the lower end of the first conical portion and the lower end of the second conical portion are arranged alternately.

[0017] Preferably, the lower end of the second conical portion is located correspondingly at a side of the lower end of the first conical portion close to the feed inlet.

[0018] Preferably, the filter has a detachable top plate at the upper end.

[0019] Preferably, a recoil box is provided on the lower surface of the top plate, a recoil port correspondingly connected to the recoil pipeline is provided on the top surface of the recoil box, a branch pipe is provided at the bottom of the recoil box, a toggle rod which can rotate under the action of the liquid sprayed therefrom is provided at the lower end of the branch pipe, and the toggle rod is in contact with the filter screen to facilitate the vibration of the filter screen.

[0020] Preferably, the lower end of the branch pipe is coaxially rotatably connected to a connecting rod, and the connecting rod is vertically facing the filter screen, and the lower end of the connecting rod is provided with a plurality of toggle rods evenly spaced along its circumference, the upper end of the connecting rod is provided with a plurality of blades evenly spaced along its circumference, and the lower end of the branch pipe is provided with a plurality of liquid outlet nozzles evenly spaced along its circumference so that the connecting rod can be rotated.

[0021] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0022] 1. During filtering and backwashing operations, there is no need to start and stop the delivery pump, so the delivery pump will not start and stop frequently, reducing the water hammer phenomenon of the delivery pump;

[0023] 2. Only one delivery pump is needed to complete the filtering and backwashing operations, which is helpful to reduce costs compared with the existing technology that uses two delivery pumps;

[0024] 3. Due to the arrangement of the branch pipe, the toggle rod, the connecting rod, the blades and the liquid outlet nozzle, the filter screen can be driven to be in a vibrating posture during the backwash operation, which is conducive to the falling of granular impurities on the mesh surface under the filter screen, thereby improving the effect of backwash cleaning of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the first structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the second structure of the utility model;

[0027] Figure 3 It is a cross-sectional view of the filter in the utility model;

[0028] Figure 4 It is a schematic diagram of the assembly structure of the top plate, recoil box, etc. in the utility model.

[0029] In the figure: 1. filter; 11. filter screen; 12. feed port; 13. discharge port; 14. slag discharge port; 15. recoil port; 16. first conical portion; 17. second conical portion; 18. top plate; 19. recoil box; 110. branch pipe; 111. toggle rod; 112. connecting rod; 113. blade; 114. liquid outlet nozzle; 2. feed pipeline; 21. first feed valve; 22. delivery pump; 23. second feed valve; 3. discharge pipeline; 31. discharge valve; 4. recoil pipeline; 41. first recoil valve; 42. second recoil valve; 5. slag discharge pipeline; 51. slag discharge valve; 6. liquid storage pipeline; 61. first liquid storage valve; 62. liquid storage tank; 63. discharge valve; 64. second liquid storage valve. DETAILED DESCRIPTION

[0030] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. to indicate directions or positional relationships, they only correspond to the drawings of the present application, in order to facilitate the description of the present invention; it should be understood that if there are terms such as "end", "side", "end part", "lateral", "lateral", "transverse", "longitudinal", etc. to indicate directions or positional relationships, they only correspond to the length and width of the corresponding parts, that is, "end part" indicates the head and tail areas in the length direction of the corresponding part, and "side part" indicates the head and tail areas in the width direction of the corresponding part; this is for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction.

[0031] Embodiment 1, in combination with the attached Figure 1 , a filtering system with a backwashing cleaning function, a filter 1 having a filter screen 11 inside, a feed port 12 at a position below the filter screen 11 on the side wall of the filter 1, a discharge port 13 at a position above the filter screen 11 on the side wall of the filter 1, a slag discharge port 14 at the bottom of the filter 1, and a backwash port 15 at the top of the filter 1; and further comprising:

[0032] The inner end of the feed pipeline 2 is connected to the feed port 12, and the feed pipeline 2 has a first feed valve 21, a delivery pump 22, and a second feed valve 23 from the outside to the inside;

[0033] The inner end of the discharge pipeline 3 is connected to the discharge port 13, and the discharge pipeline 3 has a discharge valve 31;

[0034] The backflushing pipeline 4 has an inner end correspondingly connected to the backflushing port 15 and an outer end correspondingly connected to the position of the feed pipeline 2 located between the delivery pump 22 and the second feed valve 23. The backflushing pipeline 4 has a first backflushing valve 41;

[0035] The inner end of the slag discharge pipeline 5 is correspondingly connected to the slag discharge port 14, and the slag discharge pipeline 5 has a slag discharge valve 51;

[0036] The liquid storage pipeline 6 has an inner end connected to the discharge port 13, and an outer end connected to the feed pipeline 2 between the first feed valve 21 and the delivery pump 22. The liquid storage pipeline 6 is provided with a first liquid storage valve 61, a liquid storage tank 62 and a liquid discharge valve 63 from the inside to the outside.

[0037] When filtering materials, open the first feed valve 21, the delivery pump 22, the second feed valve 23 and the discharge valve 31. At this time, the material enters the filter 1 through the feed pipeline 2, passes through the filter screen 11 and enters the discharge pipeline 3, and flows to the next process through the discharge pipeline 3. When backwashing is required, first close the discharge valve 31 and open the first liquid storage valve 61. At this time, the material in the filter 1 enters the liquid storage tank 62 through the liquid storage pipeline 6. When the liquid in the liquid storage tank 62 is appropriate, close the first feed valve 21. Valve 21, the second feed valve 23 and the first liquid storage valve 61, open the drain valve 63, the first backflush valve 41 and the slag discharge valve 51, at this time, the liquid in the liquid storage tank 62 enters the filter 1 through the backflush pipeline 4 through the action of the delivery pump 22 for backflush, and the liquid with granular impurities is discharged through the backflush pipeline 4; after the backflush is completed, close the drain valve 63, the first backflush valve 41 and the slag discharge valve 51, and open the first feed valve 21, the second feed valve 23 and the discharge valve 31.

[0038] Embodiment 2, combined with the attached Figure 2 , a filtering system with a backwash cleaning function. On the basis of the first embodiment, a second liquid storage valve 64 is provided at a position of the liquid storage pipeline 6 between the first liquid storage valve 61 and the liquid storage tank 62, and a second backwash valve 42 is provided at a position of the backwash pipeline 4 between the first backwash valve 41 and the outer end of the backwash pipeline 4. The position of the backwash pipeline 4 between the first backwash valve 41 and the second backwash valve 42 and the position of the liquid storage pipeline 6 between the first liquid storage valve 61 and the second liquid storage valve 64 share a pipeline.

[0039] When filtering materials, open the first feed valve 21, the delivery pump 22, the second feed valve 23 and the discharge valve 31. At this time, the material enters the filter 1 through the feed pipeline 2, passes through the filter screen 11 and enters the discharge pipeline 3, and flows to the next process through the discharge pipeline 3; when backwashing is required, first close the discharge valve 31, open the first liquid storage valve 61 and the second liquid storage valve 64, at this time, the material in the filter 1 enters the liquid storage tank 62 through the liquid storage pipeline 6, and when the liquid in the liquid storage tank 62 is appropriate, close the first feed valve 21, the second feed valve 23 and the discharge valve 31. Valve 23, the first liquid storage valve 61 and the second liquid storage valve 64, open the drain valve 63, the first backflush valve 41, the second backflush valve 42 and the slag discharge valve 51, at this time, the liquid in the liquid storage tank 62 enters the filter 1 through the backflush pipeline 4 for backflush through the action of the delivery pump 22, and the liquid with granular impurities is discharged through the backflush pipeline 4; after the backflush is completed, close the drain valve 63, the first backflush valve 41, the second backflush valve 42 and the slag discharge valve 51, and open the first feed valve 21, the second feed valve 23 and the discharge valve 31.

[0040] Embodiment 3, in combination with the attached Figure 3A filtering system with a backwashing cleaning function, based on the first or second embodiment, the bottom of the filter 1 has an inverted first conical portion 16, and the lower end of the first conical portion 16 has a slag discharge port 14; in this way, the liquid with granular impurities after backwashing passes through the first conical portion 16 and enters the slag discharge pipeline 5. The setting of the first conical portion 16 can prevent the existence of a "dead corner".

[0041] Embodiment 4, in combination with the attached Figure 3 A filtering system with a backwash cleaning function, based on any one of the embodiments in the third embodiment, the bottom of the filter 1 is located below the first conical portion 16 and is spaced apart from an inverted second conical portion 17, and the lower end of the second conical portion 17 has a slag discharge port 14.

[0042] This arrangement allows the granular impurities to settle into the second conical portion 17 under the action of gravity during recoil. At this time, after multiple recoils, the slag discharge valve 51 can be opened for centralized slag discharge.

[0043] Furthermore, the lower end of the first conical portion 16 and the lower end of the second conical portion 17 are arranged alternately; this can prevent the liquid flow entering through the feed port 12 from flowing toward the granular impurity pile, thereby preventing the granular impurity pile from floating up.

[0044] Furthermore, the lower end of the second conical portion 17 is located correspondingly at a side of the lower end of the first conical portion 16 close to the feed port 12 .

[0045] In this embodiment, the backwash port 15 and the discharge port 13 may be the same port.

[0046] Embodiment 5, in combination with the attached Figure 3-4 , a filtering system with a backwashing cleaning function, based on any one of the embodiments in the fourth embodiment, in order to facilitate the maintenance of the components in the filter 1, the upper end of the filter 1 has a detachable top plate 18.

[0047] Furthermore, a recoil box 19 is provided on the lower surface of the top plate 18, a recoil port 15 corresponding to the recoil line 4 is provided on the top surface of the recoil box 19, a branch pipe 110 is provided at the bottom of the recoil box 19, and a toggle rod 111 is provided at the lower end of the branch pipe 110 which can rotate under the action of the liquid sprayed therefrom, and the toggle rod 111 is in contact with the filter screen 11 to facilitate the vibration of the filter screen 11.

[0048] Furthermore, the lower end of the branch pipe 110 is coaxially rotatably connected to a connecting rod 112, and the connecting rod 112 is vertically oriented toward the filter screen 11, and the lower end of the connecting rod 112 is provided with a plurality of toggle rods 111 at evenly spaced intervals along its circumference, the upper end of the connecting rod 112 is provided with a plurality of blades 113 at evenly spaced intervals along its circumference, and the lower end of the branch pipe 110 is provided with a plurality of liquid outlet nozzles 114 at evenly spaced intervals along its circumference so that the liquid can be sprayed toward the blades 113 to facilitate the rotation of the connecting rod 112.

[0049] In this arrangement, during backflushing, the liquid in the liquid storage tank 62 enters the backflushing box 19 through the backflushing pipeline 4, a part of the liquid in the backflushing box 19 directly enters the filter 1, and the other part enters the branch pipe 110, and then is sprayed out through the liquid outlet nozzle 114. The liquid flow sprayed from the liquid outlet nozzle 114 is ejected toward the blade 113, and the blade 113 rotates, thereby driving the connecting rod 112 and the toggle rod 111 to rotate. The rotation of the toggle rod 111 causes the filter screen 11 to vibrate, which is conducive to the falling of granular impurities on the lower mesh surface of the filter screen 11.

[0050] As required, the outer end of the toggle rod 111 may be a spherical end, or may be rotatably connected to a cam or other structure.

[0051] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A filtering system with backwashing cleaning function, characterized in that: A filter (1) having a filter screen (11) inside, the filter (1) having a feed inlet (12) at a position below the filter screen (11) on the side wall, having a discharge outlet (13) at a position above the filter screen (11) on the side wall, having a slag discharge outlet (14) at the bottom of the filter (1), and having a recoil outlet (15) at the top of the filter (1); further comprising: A feed pipeline (2), the inner end of which is connected to the feed port (12), and the feed pipeline (2) has a first feed valve (21), a delivery pump (22) and a second feed valve (23) in sequence from the outside to the inside; A discharge pipeline (3), the inner end of which is correspondingly connected to the discharge port (13), and the discharge pipeline (3) has a discharge valve (31); A backflushing pipeline (4), the inner end of which is connected to the backflushing port (15) and the outer end of which is connected to a position of the feed pipeline (2) between the delivery pump (22) and the second feed valve (23), wherein the backflushing pipeline (4) has a first backflushing valve (41); A slag discharge pipeline (5), the inner end of which is correspondingly connected to the slag discharge port (14), and the slag discharge pipeline (5) has a slag discharge valve (51); The liquid storage pipeline (6) has an inner end correspondingly connected to the discharge port (13), and an outer end correspondingly connected to a position of the feed pipeline (2) between the first feed valve (21) and the delivery pump (22). The liquid storage pipeline (6) is provided with a first liquid storage valve (61), a liquid storage tank (62), and a liquid discharge valve (63) in sequence from the inside to the outside.

2. A filtering system with backwashing function according to claim 1, characterized in that: The liquid storage pipeline (6) is provided with a second liquid storage valve (64) at a position between the first liquid storage valve (61) and the liquid storage tank (62); the recoil pipeline (4) is provided with a second recoil valve (42) at a position between the first recoil valve (41) and the outer end of the recoil pipeline (4); the recoil pipeline (4) at a position between the first recoil valve (41) and the second recoil valve (42) shares a pipeline with the liquid storage pipeline (6) at a position between the first liquid storage valve (61) and the second liquid storage valve (64).

3. A filtering system with backwashing function according to claim 1, characterized in that: The filter (1) has an inverted first conical portion (16) at the bottom, and the lower end of the first conical portion (16) has the slag discharge port (14).

4. A filtering system with backwashing function according to claim 3, characterized in that: The bottom of the filter (1) is located below the first conical portion (16) and is provided with an inverted second conical portion (17) at intervals, and the lower end of the second conical portion (17) is provided with the slag discharge port (14).

5. A filtering system with backwashing function according to claim 4, characterized in that: The lower end of the first tapered portion (16) and the lower end of the second tapered portion (17) are arranged alternately.

6. A filtering system with backwashing function according to claim 5, characterized in that: The lower end of the second conical portion (17) is located correspondingly on a side of the lower end of the first conical portion (16) close to the feed inlet (12).

7. The filtering system with backwashing function according to claim 1, characterized in that: The filter (1) has a detachable top plate (18) at the upper end.

8. The filtering system with backwashing function according to claim 7, characterized in that: A recoil box (19) is provided on the lower surface of the top plate (18); a recoil port (15) correspondingly connected to the recoil pipeline (4) is provided on the top surface of the recoil box (19); a branch pipe (110) is provided at the bottom of the recoil box (19); a toggle rod (111) is provided at the lower end of the branch pipe (110) and can rotate under the action of the liquid sprayed therefrom; and the toggle rod (111) is in contact with the filter screen (11) so as to cause the filter screen (11) to vibrate.

9. A filtering system with backwashing function according to claim 8, characterized in that: The lower end of the branch pipe (110) is coaxially rotatably connected to a connecting rod (112), and the connecting rod (112) is perpendicular to the filter screen (11), and a plurality of toggle rods (111) are evenly spaced along the circumference of the lower end of the connecting rod (112), a plurality of blades (113) are evenly spaced along the circumference of the upper end of the connecting rod (112), and a plurality of liquid outlet nozzles (114) are evenly spaced along the circumference of the lower end of the branch pipe (110), so that the ejected liquid can be sprayed toward the blades (113) to facilitate the rotation of the connecting rod (112).

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