CN221412345U - Filtering device - Google Patents

Abstract

The utility model relates to the field of filters, in particular to a filtering device for solving the technical problem that filtering efficiency is affected by easy accumulation of filtering impurities on a filter screen. The filter device comprises an outer cylinder. The upper side of the outer cylinder body is provided with a water inlet pipeline. An inner cylinder with an upward opening is arranged below the water inlet pipeline in the outer cylinder, and a filtering structure is arranged at the opening of the inner cylinder so as to filter water entering the inner cylinder. The inner cylinder body is also communicated with an outward water delivery pipeline so as to output the filtered purified water outwards. The filtering structure comprises a diversion filtering surface so as to wash away impurities accumulated on the diversion filtering surface by utilizing dirty water which does not pass through the filtering structure while filtering water. A water channel is arranged between the inner cylinder body and the outer cylinder body so that dirty water which does not pass through the filtering structure flows in under the guidance of the diversion filtering surface. The lower side of the outer cylinder body is provided with a drainage structure so as to drain dirty water which does not pass through the filtering structure.

Description

Filtering device

Technical Field

The utility model relates to the field of filters, in particular to a filtering device.

Background

In the process of crude oil extraction, in order to ensure the recovery ratio of crude oil in the extraction process, water needs to be injected into an oil well to increase the formation pressure. The process has high requirement on water quality. If the injected water contains a large amount of suspended matters, the suspended matters can be accumulated at the bottom of the oil well in the water injection process to form a hotbed for the mass propagation of microorganisms such as bacteria, fungi and the like, so that microbial communities corrode the oil well and related equipment for water injection, and the service lives of the oil well and the water injection equipment are shortened. At the same time, these suspensions may also cause clogging of the water injection layer, causing the water injection pressure to rise. Therefore, the adequate filtration of water prior to injection is an essential element in crude oil recovery operations.

Existing filtering devices, such as intelligent water purifiers disclosed in the utility model of grant publication number CN205933435U, are generally provided with multiple levels of filtering screens to achieve a usable standard for water quality. However, impurities in the water tend to accumulate on the filter screen, and the filtering efficiency of the filter screen is affected. The water quantity of the filter needed in the crude oil exploitation operation is large, suspended impurities are more, the adoption of the structure can lead to the blocking of the filter screen caused by stacking a large amount of impurities on the filter screen, and even the filter screen can be broken under the action of dead weight and hydraulic impact of the stacked impurities when serious, so that the impurities are introduced into the filtered water.

Disclosure of utility model

The utility model aims to provide a filtering device for solving the technical problem that filtering efficiency is affected by easy accumulation of filtering impurities on a filter screen.

The utility model adopts the following technical scheme:

A filtering device comprises an outer cylinder, wherein a water inlet pipeline is arranged on the upper side of the outer cylinder; the water purifier is characterized in that an inner cylinder body with an upward opening is arranged below a water inlet pipeline in the outer cylinder body, a filtering structure is arranged at the opening of the inner cylinder body so as to filter water entering the inner cylinder body, and an outward water conveying pipeline is also connected to the inner cylinder body so as to output filtered purified water outwards; the filtering structure comprises a diversion filtering surface so as to wash away impurities accumulated on the diversion filtering surface by utilizing dirty water which does not pass through the filtering structure while filtering water; a water passing channel is arranged between the inner cylinder body and the outer cylinder body, so that dirty water which does not pass through the filtering structure flows in under the guidance of the diversion filtering surface; the lower side of the outer cylinder body is provided with a drainage structure so as to drain dirty water which does not pass through the filtering structure.

The beneficial effects are that: the utility model improves the existing filtering device. The inner cylinder body is independently arranged in the outer cylinder body, so that purified water and dirty water can be separated to avoid mutual pollution. Dirty water to be filtered directly falls on the filtering structure at the top of the inner cylinder body after entering the outer cylinder body from the water inlet pipeline. Part of dirty water enters the inner cylinder body after being filtered by the filtering structure and is conveyed to a water use end through a water conveying pipeline; the other part of dirty water falls down along the diversion filtering surface of the filtering structure and is discharged into the drainage structure through the water passage between the inner cylinder body and the outer cylinder body. The impurities filtered out are not easy to accumulate on the diversion filtering surface of the filtering structure due to the scouring action of dirty water. Therefore, the structure can effectively avoid the blockage of the filtering structure caused by the accumulation of a large amount of impurities on the filtering structure; and further avoid the filter structure to be destroyed under the action of the dead weight of accumulated impurities and the hydraulic impact, so that the impurities enter the purified water after filtration. Therefore, the structure is more suitable for severe working conditions of large filtered water quantity and more impurities in water.

Further: the filtering structure is a filter screen with high center and low periphery, and the diversion filtering surface is a connecting surface from the center to the periphery.

The beneficial effects are that: the filter screen has simple structure and is easy to form. Therefore, with the above structure, the filtering structure can be simplified. Meanwhile, the filter screen adopts a structure with a high center and a low periphery, and the connecting surface from the center to the periphery is used as a diversion filter surface, so that the filter screen has the effect of dispersing water flow on falling water flow during filtering. This improves the impact resistance of the screen to avoid the screen being broken by the impact of the water flow. Meanwhile, the structure can also improve the area of the filter screen and the water filtering efficiency.

Further: the filter screen is of a cambered surface conical structure and comprises a tip and a cambered surface positioned on the peripheral side of the tip, and a bus of the cambered surface conical structure is specifically a concave arc.

The beneficial effects are that: the cambered conical structure generally has a larger surface area than the conical structure or pyramid structure of the same base diameter. Therefore, the area of the filter screen can be further increased by adopting the cambered surface conical structure, and the water filtering efficiency is further improved. The bus of the cambered surface conical structure is specifically a concave arc, so that when the filter screen adopting the cambered surface conical structure bears water flow, the time of a dirty water path on the filter screen is prolonged, and the dirty water is ensured to be filtered as fully as possible. Meanwhile, the impact force of the structure on water flow has a better dispersing effect, so that the impact resistance is better.

Further: the screen includes a solid portion at the tip and a filtering portion circumferentially beside the solid portion.

The beneficial effects are that: the tip of filter screen adopts solid structure, can make the filter screen bear bigger rivers impact, and then can make the urceolus can let in the rivers of bigger flow. Meanwhile, the tip of the filter screen adopts a solid structure, so that the dispersing effect of the filter screen on falling water flow can be ensured to be consistent in all directions. Therefore, the effect that the filter screen is washed by water flow can be ensured to be more uniform.

Further: the drainage structure comprises a dirty water sedimentation cavity and a sewage draining structure arranged at the lower end of the dirty water sedimentation cavity.

The beneficial effects are that: by adopting the structure, dirty water can be settled through the dirty water settling cavity, and deposited impurities are discharged through the sewage drain after the dirty water is settled. By adopting the structure, the dirty water after sedimentation and desilting can be put into use again, so that the utilization rate of the water is improved. And meanwhile, the device is also beneficial to timely discharging the filtered impurities in the outer cylinder so as to prevent the impurity accumulation in the outer cylinder from influencing the dredging effect on the flow guide filtering surface of the filtering structure.

Further: the drainage structure is communicated with a circulation pipeline; the circulating pipeline is used for pumping the dirty water subjected to sedimentation treatment in the dirty water sedimentation cavity into the outer cylinder body again for filtering.

The beneficial effects are that: the dirty water after sedimentation treatment in the dirty water sedimentation cavity contains fewer impurities compared with the newly added dirty water. Therefore, when the dirty water after sedimentation treatment reenters the outer cylinder body through the circulating pipeline and begins to be filtered again, a better cleaning and flushing effect can be achieved on the diversion filtering surface of the filtering structure. And secondly, the dirty water after sedimentation treatment is put into filtration again, so that the filtration efficiency is improved, and the problem of water resource waste caused by direct waste is avoided.

Further: the dirty water sedimentation cavity is of an inverted cone structure with a large-diameter end upwards arranged, and the sewage draining structure comprises a sewage draining pipeline arranged at the bottom of the inverted cone structure of the dirty water sedimentation cavity and a sewage draining valve which is arranged on the sewage draining pipeline and used for controlling the opening and closing of the sewage draining pipeline.

The beneficial effects are that: the dirty water sedimentation cavity adopts an inverted cone structure with a large diameter end upwards arranged, so that sedimentation and sedimentation impurities can be accumulated in a sewage pipeline arranged at the bottom of the inverted cone structure of the dirty water sedimentation cavity through the inclined surface of the inverted cone structure. The drain valve is closed when the dirty water sedimentation cavity carries out sedimentation treatment on the dirty water, and is opened briefly after sedimentation is finished and before the dirty water is pumped into the water inlet structure again so as to fully discharge sedimentation and sedimentation impurities. By adopting the structure, the efficiency of removing the sedimentation and siltation impurities of the dirty water sedimentation structure is more efficient, and the dredging effect is more sufficient; and then make and throw in filtered water more clean again, it is better to the clean effect of filter screen, also more be favorable to the promotion of filtration efficiency.

Further: one end of the circulating pipeline is communicated with a sewage drain pipeline.

The beneficial effects are that: one end of the circulating pipeline is communicated with the sewage drain pipeline, so that as much dirty water after sedimentation treatment can enter the circulating pipeline as possible, and the utilization rate of the water is effectively improved. Meanwhile, more dirty water after sedimentation treatment can be used for flushing the diversion filtering surface of the filtering structure, so that better dredging effect on the diversion filtering surface of the filtering structure is ensured.

Further: the inner cylinder body and the outer cylinder body are coaxially arranged; the gap between the inner cylinder body and the outer cylinder body forms a water passing channel.

The beneficial effects are that: the inner cylinder body and the outer cylinder body are coaxially arranged; and the gap between the inner cylinder body and the outer cylinder body forms a water passing channel. With such an arrangement, the water passage area can be made relatively larger; meanwhile, the gap sizes of the channels are uniform, and the problem of uneven water passing effect at the gap size mutation at the position caused by the mutation of the gap size at the position is solved.

Further: the inner cylinder body is internally provided with a fine filtering layer above the water conveying pipeline and at the lower end of the filtering structure so as to carry out fine filtering on water entering the inner cylinder body.

The beneficial effects are that: the fine filter layer is arranged at the lower end of the filter screen and above the water conveying pipeline, so that the water quality output by the water conveying pipeline after filtration can be improved; on the other hand has also alleviateed the filtration requirement of filter screen for the water hole on the filter screen need not set up too narrow and small intensive, and then avoids the impurity that leads to because of the water hole on the filter screen is too narrow and small intensive easily to deposit the problem of silting on the water hole.

Drawings

FIG. 1 is a schematic view of a filtering device and an external water storage tank according to the principle of the scheme of the utility model;

FIG. 2 is a schematic view of the filter apparatus of FIG. 1;

The names of the corresponding components in the figures are: 1. an outer cylinder; 2. an upper cover; 3. a water storage tank; 4. a water inlet pipeline; 5. a filter screen; 6. an inner cylinder; 7. a fine filtration layer; 8. an adsorption layer; 9. a water passing channel; 10. a dirty water sedimentation chamber; 11. a sewage drain pipe; 12. a blow-down valve; 13. a circulation pump; 14. a circulation line; 15. a water inlet cover; 16. a water delivery pipeline; 17. an electromagnetic valve; 18. an observation window; 19. a water storage tank filter screen; 20. a water level gauge; 21. an observation port; 22. metering pump.

Detailed Description

The features and capabilities of the present utility model are described in further detail below in connection with the examples.

The scheme principle of the filtering device shown in the utility model is as follows:

The filtering device shown in fig. 2 comprises an outer cylinder 1, a water inlet pipeline 4 arranged on an upper cover 2 of the outer cylinder 1 and a water draining structure arranged on the lower side of the outer cylinder 1. An inner cylinder 6 with an upward opening is suspended and fixed below the water inlet pipeline 4 in the outer cylinder 1, and a water channel 9 is arranged between the inner cylinder 6 and the outer cylinder 1. By providing the inner cylinder 6 in the outer cylinder 1 alone, the purified water and dirty water can be separated to avoid mutual pollution. The opening of the inner cylinder 6 is provided with a filtering structure. When the water inlet pipeline 4 injects water into the outer cylinder 1, dirty water to be filtered directly falls on the filtering structure at the top of the inner cylinder 6. The filter structure comprises a diversion filter surface. The diversion filtering surface can diversion the dirty water which flows on the diversion filtering surface and does not pass through the filtering structure, so that the dirty water stably flows into the water channel 9. Part of dirty water enters the inner cylinder 6 after being filtered by the filtering structure, and is conveyed to a water end through a water conveying pipeline 16 which is arranged on the inner cylinder 6 and is communicated with the outside. The key point of the utility model is that the filtering structure is used for filtering water and also flushing impurities accumulated on the diversion filtering surface by utilizing dirty water which does not pass through the filtering structure. The other part of dirty water which fails to pass through the filter falls down along the diversion filtering surface of the filtering structure and enters the drainage structure through the water passage 9 between the inner cylinder 6 and the outer cylinder 1 so as to be convenient for drainage. Therefore, the filtered impurities are not easy to accumulate on the diversion filtering surface of the filtering structure.

In order to further explain the application scenario of the filtering device, as shown in fig. 1, the water pipe 16 on the inner cylinder 6 may be externally connected with a water storage tank 3. As shown in fig. 2, the water pipe 16 is located at one end of the inner cylinder 6 and is covered with a water inlet cover 15 to avoid turbulence in the inner cylinder 6 when the water pipe 16 is opened. The water delivery pipeline 16 may be provided with a solenoid valve 17 as shown in fig. 1 to control the on-off of the water delivery pipeline 16. A layer of water storage tank filter screen 19 can be arranged below the water delivery pipeline 16 in the water storage tank 3 to further ensure the water quality in the water storage tank 3.

In order to facilitate control of the filtering process of the filtering device and the water storage and drainage conditions in the water storage tank 3, the inner cylinder 6 and the outer cylinder 1 of the filtering device can be provided with communicated observation windows 18 to display the water level conditions in the inner cylinder 6 and the outer cylinder 1. The water level gauge 20 and the observation port 21 can be arranged on the water storage tank 3 body to visually display the water level condition in the water storage tank 3. The drain opening of the reservoir 3 may be provided with a metering pump 22 for quantitatively controlling the amount of water discharged from the reservoir 3.

Existing filtering devices, such as intelligent water purifiers disclosed in the utility model of grant publication number CN205933435U, typically filter all the liquid to be filtered. However, the filter is not suitable for severe working conditions of large filtered water quantity and more impurities in water. The key of the technical scheme is that part of water is purified by the filtering structure, and the other part of water is left to wash the diversion filtering surface of the filtering structure to prevent blockage. Thus, a large amount of impurities can be effectively prevented from accumulating on the filtering structure; and further avoid the filter structure to be destroyed under the action of the dead weight of accumulated impurities and the hydraulic impact, so that the impurities enter the purified water after filtration. Therefore, the filtering device is more suitable for severe working conditions of large filtered water quantity and more impurities in water.

Example 1 of the filtration device of the present utility model:

A filtering device comprises an outer cylinder body 1, a water inlet pipeline 4 arranged on the upper side of the outer cylinder body 1 and a water draining structure arranged on the lower side of the outer cylinder body 1. For specific structure, reference is made to the filter device described in fig. 2 of the accompanying description. Wherein, an inner cylinder 6 with an upward opening is suspended and fixed below the water inlet pipeline 4 in the outer cylinder 1. The space between the inner cylinder 6 and the outer cylinder 1 is used as a water passing channel 9. The opening of the inner cylinder 6 is provided with a filtering structure. When the water inlet pipeline 4 injects water into the outer cylinder 1, dirty water to be filtered directly falls on the filtering structure at the top of the inner cylinder. Part of dirty water enters the inner cylinder 6 after being filtered by the filtering structure, and is conveyed to a water end through a water conveying pipeline 16 which is arranged on the inner cylinder 6 and is communicated with the outside. The other part of dirty water which fails to pass through the filter falls down along the diversion filtering surface of the filtering structure, and enters the drainage structure through the water channel 9 between the inner cylinder 6 and the outer cylinder 1 so as to be conveniently drained in time. The filter structure comprises a diversion filter surface which is arranged obliquely so as to wash away impurities accumulated on the diversion filter surface by utilizing dirty water which does not pass through the filter structure.

The key point of this embodiment is that the filtering structure is a filter screen 5 with high center and low periphery. The filter screen 5 has simple structure and is easy to form. Therefore, the filter structure adopts the filter screen 5 in particular, and the scheme can be simplified. The filter screen 5 adopts a structure with high center and low periphery, and can play a role in dispersing water flow for falling water flow during filtering. This improves the impact resistance of the screen 5 to avoid the screen 5 from being broken by the impact of water flow. At the same time, the structure can also improve the area of the filter screen 5 and the water filtering efficiency. Of course, the screen 5 may also be a straight screen 5 arranged obliquely. The opening of the inner cylinder 6 is correspondingly provided with an inclined installation structure of the straight-face filter screen 5. With the arrangement, the processing and forming difficulty of the filter screen 5 can be reduced, and the implementation is convenient.

The filter screen 5 may specifically adopt a cambered surface tapered structure including a tip and a cambered surface located on the peripheral side of the tip. The cambered surface conical structure means that the section of the structure cut along any generatrix direction comprises three contour lines: the horizontal contour line is positioned at the bottom end, and arc-shaped generatrix is positioned at two sides above the horizontal contour line. The cambered conical structure generally has a larger surface area than the conical structure or pyramid structure of the same base diameter. Therefore, the area of the filter screen 5 can be further increased by adopting the cambered surface conical structure for the filter screen 5, and the water filtering efficiency is further improved. Of course, the screen 5 may also be of conventional conical or pyramidal configuration. Thus, compared with the filter screen 5 adopting the arc conical surface structure, the method is better in processing and is also convenient for controlling the quality of finished products after processing. The bus of the cambered surface conical structure is specifically a concave arc. Compared with the filter screen 5 adopting the cambered surface conical structure with the bus being the upward convex arc, the filter screen 5 adopting the arrangement has the advantages that the time for dirty water to pass through the filter screen 5 is prolonged, and the dirty water is ensured to be filtered as fully as possible. Meanwhile, the impact force of the water flow is better dispersed, so that the impact resistance is better. Of course, the structure of the filter screen 5 can also adopt a cambered surface conical structure with a bus being an upward convex arc line. This makes it less likely that the filtered impurities will accumulate on the screen 5.

In the foregoing technique, the screen 5 may be provided with a tip portion of a solid structure, and a circumferential side of the solid portion may be provided with a filtering portion having water holes. The tip of the filter screen 5 adopts a solid structure, so that the filter screen 5 can bear larger water flow impact, and the outer cylinder 1 can be enabled to be capable of leading in larger flow water flow. Meanwhile, the tip of the filter screen 5 adopts a solid structure, so that the dispersion effect of the filter screen 5 on falling water flow can be ensured to be consistent in all directions. This ensures that the filter screen 5 is more evenly flushed by the water flow. Of course, the filter screen 5 may be a hollow structure with water holes to ensure the water permeability of the filter screen 5.

Example 2 of the filtration device of the present utility model:

A filtering device comprises an outer cylinder body 1, a water inlet pipeline 4 arranged on the upper side of the outer cylinder body 1 and a water draining structure arranged on the lower side of the outer cylinder body 1. For specific structure, reference is made to the filter device described in fig. 2 of the accompanying description. Wherein, an inner cylinder 6 with an upward opening is suspended and fixed below the water inlet pipeline 4 in the outer cylinder 1. The space between the inner cylinder 6 and the outer cylinder 1 is used as a water passing channel 9. The opening of the inner cylinder 6 is provided with a filtering structure. When the water inlet pipeline 4 injects water into the outer cylinder 1, dirty water to be filtered directly falls on the filtering structure at the top of the inner cylinder. Part of dirty water enters the inner cylinder 6 after being filtered by the filtering structure, and is conveyed to a water end through a water conveying pipeline 16 which is arranged on the inner cylinder 6 and is communicated with the outside. The other part of dirty water which fails to pass through the filter falls down along the diversion filtering surface of the filtering structure, and enters the drainage structure through the water channel 9 between the inner cylinder 6 and the outer cylinder 1 so as to be conveniently drained in time. The filter structure comprises a diversion filter surface which is arranged obliquely so as to wash away impurities accumulated on the diversion filter surface by utilizing dirty water which does not pass through the filter structure.

The key point of this embodiment is that the drainage structure includes a dirty water sedimentation chamber 10 and a sewage draining structure disposed at the lower end of the dirty water sedimentation chamber 10. Wherein the dirty water sedimentation chamber 10 is used for sedimentation of dirty water, and the sewage discharging structure is used for discharging deposited impurities after sedimentation. By adopting the drainage structure, dirty water after sedimentation and desilting can be put into use again, so that the utilization rate of the water is improved. Meanwhile, the arrangement is also beneficial to timely discharging the filtered impurities in the outer cylinder 1 so as to prevent the impurity accumulation in the outer cylinder 1 from influencing the dredging effect on the diversion filtering surface of the filtering structure.

Of course, the drainage structure can also be a drainage pipeline communicated with the bottom of the outer cylinder body 1 directly to drain dirty water which is not filtered. This can simplify the structure of the filtering device. Meanwhile, the influence of the structure on the flow velocity of water is small, and the structure can keep a normally open state, so that the structure is suitable for the situation that a plurality of filtering devices are communicated in series to filter water on the same pipeline.

On the basis of the foregoing, a circulation line 14 may be connected to the drain structure. The circulation line 14 is used to re-pump the dirty water, which has been subjected to sedimentation treatment in the dirty water sedimentation chamber 10, into the outer cylinder 1 for re-filtration. Since the dirty water after sedimentation treatment in the dirty water sedimentation chamber 10 contains less impurities. Therefore, when the dirty water after sedimentation treatment reenters the outer cylinder 1 through the circulating pipeline 14 and begins to be filtered again, a better cleaning and flushing effect can be achieved on the diversion filtering surface of the filtering structure. And secondly, the dirty water after sedimentation treatment is put into filtration again, so that the filtration efficiency is improved, and the problem of water resource waste caused by direct waste is avoided. A circulation pump 13 may be provided on the circulation line 14 to ensure stable operation of the circulation line 14.

Of course, in some situations, for example, when the water treated by the filtering device has different uses according to different water qualities, the drainage pipeline can be omitted from being connected with the circulation pipeline 14. The dirty water is treated by the filtering device and can be divided into three grades of water, namely purified water, secondary purified water and dirty water. The purified water is the water which is filtered by the filtering structure in the filtering device and is output from the inner cylinder 6. The purified water is used in occasions with higher requirements on water quality, such as oil well water injection. The dirty water is water discharged from the sewage draining structure after sedimentation treatment. This water contains impurities that settle and settle, and generally requires disposal or other means of recovery. The secondary water is water discharged from the sewage disposal structure again after sedimentation treatment and discharge of sedimentation and sedimentation deposited impurities. The water has low water quality but low impurity content, so that the water can be used in occasions with low requirements on water quality, such as road flushing.

The dirty water sedimentation chamber 10 may specifically adopt an inverted cone structure with a large diameter end arranged upward. The sewage draining structure specifically comprises a sewage draining pipeline 11 arranged at the tip of the lower end of the inverted cone-shaped structure of the sewage settling cavity 10, and a sewage draining valve 12 arranged on the sewage draining pipeline 11 and used for controlling the opening and closing of the sewage draining pipeline 11. The dirty water sedimentation chamber 10 adopts an inverted cone structure with a large diameter end upwards, so that sedimentation and sedimentation impurities can be accumulated in a sewage pipeline 11 arranged at the tip of the lower end of the inverted cone structure of the dirty water sedimentation chamber 10 through the inclined surface of the inverted cone structure. The drain valve 12 is closed when the dirty water sedimentation chamber 10 is used for carrying out sedimentation treatment on the dirty water, and is opened briefly after sedimentation is finished and before the dirty water is pumped into the water inlet structure again so as to fully discharge deposited sedimentation and sedimentation impurities. By adopting the means, the efficiency of removing the sedimentation and siltation impurities of the dirty water sedimentation structure is more efficient, and the dredging effect is more sufficient; and then make and throw in filtered water more clean again, it is better to the clean effect of filter screen 5, also more be favorable to the promotion of filtration efficiency.

The dirty water sedimentation chamber 10 may have a hemispherical structure in addition to an inverted conical structure with a large diameter end arranged upward. Compared with the inverted cone structure, the hemispherical structure can accommodate more dirty water, and is favorable for improving the efficiency of dirty water sedimentation treatment. The sewage drain 11 is provided at the lowermost end of the hemispherical structure so as to settle the deposited impurity accumulation. When the installation space structure of the filtering structure is limited, the sewage drain pipe 11 may be replaced with a sewage drain arranged at the lowest end of the dirty water sedimentation chamber 10. The drain outlet is provided with a sealing plug so as to realize the opening and closing of the drain outlet in a manual mode.

When the sewage drain pipe 11 is arranged at the lower end of the dirty water sedimentation cavity 10, one end of the circulating pipeline 14 can be communicated with the sewage drain pipe 11, and the other end is communicated with the water inlet pipeline 4. Compared with the structure that one end of the circulating pipeline 14 is communicated with the dirty water sedimentation cavity 10 and the other end of the circulating pipeline is communicated with the water inlet pipeline 4, the dirty water subjected to sedimentation treatment can enter the circulating pipeline as much as possible, and the utilization rate of the water is further effectively improved. Meanwhile, more dirty water after sedimentation treatment can be used for flushing the diversion filtering surface of the filtering structure, so that better dredging effect on the diversion filtering surface of the filtering structure is ensured. Of course, the circulation line 14 may be connected to the dirty water sedimentation chamber 10 at one end and to the water inlet line 4 at the other end. This ensures that the water entering the circulation line 14 must be the cleanest portion after settling. Thus, the quality of dirty water in the process of recirculation can be effectively improved.

The water passage 9 may be implemented in the following manner: the inner cylinder 6 and the outer cylinder 1 are coaxially arranged, and a gap between the inner cylinder 6 and the outer cylinder 1 is used as a water passage 9. With such an arrangement, the water passage 9 can be made relatively large in area; meanwhile, the gap sizes of the channels are uniform, and the problem of uneven water passing effect at the gap size mutation at the position caused by the mutation of the gap size at the position is solved. Of course, the water passage 9 may be formed by a fixed connection structure between the inner cylinder 6 and the outer cylinder 1. Such as a plurality of annular connection plates arranged between the inner cylinder 6 and the outer cylinder 1. The outer wall of the inner cylinder 6 is welded with the inner annular surface of the annular connecting plate into a whole, and the inner wall of the outer cylinder 1 is welded with the outer annular surface of the annular connecting plate into a whole so as to realize the suspended fixation of the inner cylinder 6 relative to the outer cylinder 1. The annular connecting plates are provided with a plurality of through holes, and a pipeline serving as a water channel 9 is connected between any pair of opposite through holes on different annular connecting plates. By adopting the arrangement, the reliable fixed connection relationship between the inner cylinder body 6 and the outer cylinder body 1 can be ensured, and the integral strength of the structure is better.

Other parts of the present embodiment, which are not described in detail, may be the same as those described in other embodiments.

Example 3 of the filtration device of the present utility model:

A filtering device comprises an outer cylinder body 1, a water inlet pipeline 4 arranged on the upper side of the outer cylinder body 1 and a water draining structure arranged on the lower side of the outer cylinder body 1. For specific structure, reference is made to the filter device described in fig. 2 of the accompanying description. Wherein, an inner cylinder 6 with an upward opening is suspended and fixed below the water inlet pipeline 4 in the outer cylinder 1. The space between the inner cylinder 6 and the outer cylinder 1 is used as a water passing channel 9. The opening of the inner cylinder 6 is provided with a filtering structure. When the water inlet pipeline 4 injects water into the outer cylinder 1, dirty water to be filtered directly falls on the filtering structure at the top of the inner cylinder. Part of dirty water enters the inner cylinder 6 after being filtered by the filtering structure, and is conveyed to a water end through a water conveying pipeline 16 which is arranged on the inner cylinder 6 and is communicated with the outside. The other part of dirty water which fails to pass through the filter falls down along the diversion filtering surface of the filtering structure, and enters the drainage structure through the water channel 9 between the inner cylinder 6 and the outer cylinder 1 so as to be conveniently drained in time. The filter structure comprises a diversion filter surface which is arranged obliquely so as to wash away impurities accumulated on the diversion filter surface by utilizing dirty water which does not pass through the filter structure.

The key point of the embodiment is that a fine filtering layer 7 is arranged at the lower end of the inner cylinder 6 above the water conveying pipeline 16 so as to carry out fine filtering on water entering the inner cylinder 6. On the one hand, the water quality output by the water conveying pipeline 16 after filtration can be improved; on the other hand has also alleviateed the filtration requirement of filter screen 5 for the water hole on the filter screen 5 need not set up too narrow and small intensive, and then avoids the impurity that leads to because of the water hole on the filter screen 5 is too narrow and small intensive easily to deposit the problem of silting up on the water hole. The filter layer 7 may be provided in only one layer, or may be provided in two or more layers. Depending on the requirements of the water quality and filtration rate for a particular use, this will not be repeated here.

It is easy to think that the bottom layer of the inner cylinder 6 below the water pipe 16 can be provided with an adsorption layer 8 so as to adsorb impurities in the water after fine filtration. On one hand, the water quality output by the water delivery structure after filtration can be improved; on the other hand has also alleviateed the filtration requirement of filter screen 5 and smart filtering layer 7 for the water hole of filter screen 5 and smart filtering layer 7 need not set up too narrow and small intensive, and then avoids the problem that the impurity is easy to deposit siltation on the water hole because of the too narrow and small intensive water hole on filter screen 5 and smart filtering layer 7.

Other parts of the present embodiment, which are not described in detail, may be the same as those described in other embodiments.

The above description is only a preferred embodiment of the present utility model, and the patent protection scope of the present utility model is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The filtering device comprises an outer cylinder body (1), wherein a water inlet pipeline (4) is arranged on the upper side of the outer cylinder body (1); the water purifier is characterized in that an inner cylinder body (6) with an upward opening is arranged below a water inlet pipeline (4) in the outer cylinder body (1), a filtering structure is arranged at the opening of the inner cylinder body (6) so as to filter water entering the inner cylinder body (6), and an outward water conveying pipeline (16) is also connected to the inner cylinder body (6) so as to output filtered purified water outwards; the filtering structure comprises a diversion filtering surface so as to wash away impurities accumulated on the diversion filtering surface by utilizing dirty water which does not pass through the filtering structure while filtering water; a water passing channel (9) is arranged between the inner cylinder body (6) and the outer cylinder body (1) so that dirty water which does not pass through the filtering structure flows in under the guidance of the diversion filtering surface; the lower side of the outer cylinder body (1) is provided with a drainage structure so as to drain dirty water which does not pass through the filtering structure.

2. The filter device according to claim 1, characterized in that the filter structure is a filter screen (5) with a high center and a low periphery, and the flow guiding filter surface is a connecting surface from the center to the periphery.

3. The filtering device according to claim 2, characterized in that the filter screen (5) is of a conical structure with a cambered surface, comprising a tip and a cambered surface located at the peripheral side of the tip, and the generatrix of the conical structure with a cambered surface is in particular a concave arc.

4. A filter device according to claim 3, characterized in that the screen (5) comprises a solid portion at the tip and a filter portion at the circumferential side of the solid portion.

5. The filtering device according to claim 1, characterized in that the drainage structure comprises a dirty water sedimentation chamber (10) and a sewage draining structure arranged at the lower end of the dirty water sedimentation chamber (10).

6. A filter device according to claim 5, characterized in that the drain structure is connected with a circulation line (14); the circulating pipeline (14) is used for pumping the dirty water subjected to sedimentation treatment in the dirty water sedimentation cavity (10) into the outer cylinder body (1) again for filtering.

7. The filtering device according to claim 6, wherein the dirty water sedimentation chamber (10) is of an inverted cone structure with a large diameter end arranged upwards, and the sewage disposal structure comprises a sewage disposal pipeline (11) arranged at the bottom of the inverted cone structure of the dirty water sedimentation chamber (10) and a sewage disposal valve (12) arranged on the sewage disposal pipeline (11) and used for controlling the opening and closing of the sewage disposal pipeline (11).

8. A filter device according to claim 7, characterized in that the circulation line (14) is connected at one end to a drain line (11).

9. The filter device according to claim 1, characterized in that the inner cylinder (6) is arranged coaxially with the outer cylinder (1); the gap between the inner cylinder body (6) and the outer cylinder body (1) forms a water passing channel (9).

10. A filter device according to claim 1, characterized in that a fine filter layer (7) is arranged in the inner cylinder (6) above the water pipe (16) and at the lower end of the filter structure for fine filtering of the water entering the inner cylinder (6).