Filtering tank

Abstract

The utility model relates to a filtering tank which comprises a tank body and a backwashing assembly, a water inlet and outlet pipe is arranged at the top of the tank body, a water outlet pipe is arranged at the bottom of the tank body, the backwashing assembly comprises a vertically arranged main pipe, a plurality of separation nets and a plurality of branch pipes, the separation nets are sequentially arranged in the vertical direction, and the branch pipes are fixedly connected with the separation nets respectively. The top end of the main pipe is externally connected with a water source, the bottom end of the main pipe is closed and extends into the tank body to penetrate through the plurality of separation nets, the plurality of separation nets divide the interior of the tank body into a plurality of filtering cavities filled with filtering materials, at least one branch pipe is arranged below each separation net, one end of each branch pipe is closed, and the other end of each branch pipe is communicated with the corresponding filtering cavity. The other end of the branch pipe is communicated with the main pipe, and an opening is formed in the top of the branch pipe and is used for guiding water flow in the main pipe to a filter material rushing to the upper part of the branch pipe; the utility model aims to solve the problems of small impact force on an upper-layer filter material and poor cleaning effect in a bottom water inlet backwashing mode.

Description

Technical Field

[0001] The utility model relates to the technical field of filter tanks, in particular to a filter tank. Background Art

[0002] A filter tank uses a layered bed of anthracite, sand, crushed garnet or other materials. The top layer of the bed consists of the lightest and coarsest grades of materials, while the heaviest and finest grades of materials are placed at the bottom of the bed.

[0003] Currently, most filter media in filtration are cleaned by backwashing. For example, a filter device for facilitating backwashing with the application number CN201520699304.1 includes a filter tank, a water inlet pipe, a water outlet pipe and a backwash pipe. Filter media for filtration are placed in the filter tank. The water inlet pipe is arranged at the top of the filter tank, and the water inlet pipe is used to receive external water flow and introduce it into the interior of the filter tank. The water outlet pipe is arranged at the bottom of the filter tank, and the water outlet pipe is used to discharge the filtered water flow out of the filter tank. The backwash pipe is arranged at the bottom of the filter tank and partially extends into the filter tank. Two water outlet openings located inside the filter tank are formed on the backwash pipe, and the two water outlet openings are respectively arranged close to the inner wall of the filter tank. An inlet opening located outside the filter tank is also arranged on the backwash pipe.

[0004] However, the backwashing method with bottom water inlet has a small impact force on the upper filter media, and the cleaning effect is poor. Summary of the Utility Model

[0005] In view of this, it is necessary to provide a filter tank to solve the problem that the backwashing method with bottom water inlet has a small impact force on the upper filter media and the cleaning effect is poor.

[0006] The utility model provides a filter tank, which includes a tank body and a backwashing assembly. A water inlet and drain pipe is arranged at the top of the tank body, and a water outlet pipe is arranged at the bottom of the tank body. The backwashing assembly includes a main pipe vertically arranged, a plurality of partition nets arranged in sequence along the vertical direction, and a plurality of branch pipes respectively fixedly connected to the plurality of partition nets. The top end of the main pipe is externally connected to a water source, the bottom end of the main pipe is closed and extends into the tank body and passes through the plurality of partition nets. The plurality of partition nets divide the interior of the tank body into a plurality of filter chambers filled with filter media. At least one branch pipe is arranged below each partition net. One end of the branch pipe is closed, and the other end of the branch pipe is communicated with the main pipe. The top of the branch pipe is open to guide the water flow in the main pipe to impact the filter media above it.

[0007] Further, the partition net includes a partition board and a filter screen. A groove for communicating adjacent two filter chambers is formed on the partition net, and the filter screen is embedded in the groove. The filter holes of the plurality of filter screens gradually become smaller along the vertically downward direction. The branch pipe is placed in the groove and is located at a position below the corresponding filter screen.

[0008] Further, the main pipe is slidably connected to the tank body in the vertical direction. The backwashing assembly further includes a lifting member installed at the top of the tank body. The output end of the lifting member is connected to the main pipe to drive the main pipe to slide so that the filter media reciprocates in the vertical direction.

[0009] Further, it further includes a plurality of sliders arranged along the circumference of the tank body at its inner wall. A plurality of chutes are evenly arranged along the circumference of the side wall of the partition net. The plurality of sliders are respectively slidably connected to the plurality of chutes. The sliders are L-shaped to define the downward sliding position of the partition net.

[0010] Further, the lifting member includes a plurality of oil cylinders and a connecting plate evenly arranged along the circumference of the main pipe. The connecting plate is fixedly connected to the main pipe. The output shafts of the plurality of oil cylinders are connected to the connecting plate, and the plurality of oil cylinders are arranged in a linkage manner.

[0011] Further, it further includes a plurality of support rings corresponding to the plurality of partition nets one by one. The plurality of support rings are respectively fixedly connected to the bottoms of the corresponding partition nets, and the inner walls of the support rings are welded to the main pipe.

[0012] Further, the branch pipes are horizontally arranged, the number of the openings is multiple, and the multiple openings are arranged in sequence along the length direction of the branch pipes. The backwashing assembly further includes a plurality of spray heads installed at the plurality of openings.

[0013] Further, it further includes a water supply assembly connected to the top end of the main pipe.

[0014] Further, the water supply assembly includes a water storage tank fixedly arranged above the tank body and a corrugated pipe connecting the water storage tank and the main pipe.

[0015] Further, it further includes a first valve installed on the outlet pipe and a second valve installed between the water storage tank and the corrugated pipe.

[0016] Compared with the prior art, the internal space of the tank body is stratified by the plurality of partition nets provided. A variety of filter media with gradually decreasing filter gaps formed can be sequentially placed in multiple filter chambers in the vertically downward direction. During the backwashing process, water is supplied to the branch pipes through the main pipe, and corresponding branch pipes are arranged at the bottom of each filter chamber. Compared with the bottom water inlet method, the multi-layer water inlet backwashing effect of this filter tank is good, and the filter media is cleaned more thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall external structure in the filter tank provided by the embodiment of the present invention;

[0018] Figure 2 Schematic diagram of the overall internal structure in the filter tank provided by the embodiment of the present utility model;

[0019] Figure 3 Schematic diagram of the structure of the backwashing assembly in the filter tank provided by the embodiment of the present utility model. Detailed implementation manners

[0020] Next, the preferred embodiments of the present utility model will be specifically described with reference to the accompanying drawings. The accompanying drawings form a part of this application and are used together with the embodiments of the present utility model to illustrate the principle of the present utility model, rather than to limit the scope of the present utility model.

[0021] As Figure 1-2 shown, a filter tank provided by the present utility model includes a tank body 100 and a backwashing assembly 200. A water inlet and outlet pipe 110 is provided at the top of the tank body 100, and a water outlet pipe 120 is provided at the bottom of the tank body 100. The backwashing assembly 200 includes a main pipe 210 arranged vertically, a plurality of partition nets 220 arranged in sequence along the vertical direction, and a plurality of branch pipes 230 fixedly connected to the plurality of partition nets 220 respectively. The top end of the main pipe 210 is externally connected to a water source, the bottom end of the main pipe 210 is closed and extends into the tank body 100 and is arranged to pass through the plurality of partition nets 220. The plurality of partition nets 220 divide the interior of the tank body 100 into a plurality of filter chambers filled with filter media. At least one branch pipe 230 is provided below each partition net 220. One end of the branch pipe 230 is closed, and the other end of the branch pipe 230 is communicated with the main pipe 210. The top of the branch pipe 230 is open to guide the water flow in the main pipe 210 to rush towards the filter media above it.

[0022] Among them, the internal space of the tank body 100 is stratified by the plurality of partition nets 220 provided, and various filter media with gradually decreasing filter gaps formed can be sequentially placed in the plurality of filter chambers along the vertically downward direction. During the backwashing process, water is supplied to the branch pipes 230 through the main pipe 210. A corresponding branch pipe 230 is provided at the bottom of each filter chamber. Compared with the bottom water inlet method, the multi-layer water inlet backwashing effect of this filter tank is good, and the filter media is cleaned more thoroughly.

[0023] In this implementation manner, a water inlet and outlet pipe 110 is provided at the top of the tank body 100, and a water outlet pipe 120 is provided at the bottom of the tank body 100. During the filtering process, the main pipe 210 is closed, water enters through the water inlet and outlet pipe 110, and water exits through the water outlet pipe 120. During the backwashing process, the water outlet pipe 120 is closed, water enters through the main pipe 210, and water exits through the water inlet and outlet pipe 110.

[0024] The backwashing assembly 200 in this embodiment includes a main pipe 210 arranged vertically, a plurality of partition nets 220 arranged in sequence along the vertical direction, and a plurality of branch pipes 230 fixedly connected to the plurality of partition nets 220 respectively. The top end of the main pipe 210 is externally connected to a water source, the bottom end of the main pipe 210 is closed and extends into the tank body 100 and is arranged through the plurality of partition nets 220. The plurality of partition nets 220 divide the interior of the tank body 100 into a plurality of filter cavities filled with filter media. At least one branch pipe 230 is arranged below each partition net 220. One end of the branch pipe 230 is closed, and the other end of the branch pipe 230 is communicated with the main pipe 210. The top of the branch pipe 230 is open to guide the water flow in the main pipe 210 to rush towards the filter media above it.

[0025] As Figure 3 shown, in one embodiment, the partition net 220 includes a partition plate 221 and a filter screen 222. A groove 221a for communicating adjacent two filter cavities is formed on the partition net 220. The filter screen 222 is embedded in the groove 221a. The filter holes of the plurality of filter screens 222 gradually become smaller along the vertically downward direction. The branch pipe 230 is placed in the groove 221a and is located at a position below the corresponding filter screen 222.

[0026] Among them, the number of the grooves 221a can be set to be multiple, and the multiple grooves 221a are uniformly arranged along the circumferential direction of the main pipe 210.

[0027] To improve the cleaning effect on the filter media, in one embodiment, the main pipe 210 is slidably connected to the tank body 100 along the vertical direction. The backwashing assembly 200 further includes a lifting member 240 installed at the top of the tank body 100. The output end of the lifting member 240 is connected to the main pipe 210 to drive the main pipe 210 to slide so that the filter media reciprocates along the vertical direction.

[0028] To limit the sliding of the partition net 220 along the vertical direction, in one embodiment, it further includes a plurality of sliders 223 arranged along the circumferential direction of the inner wall of the tank body 100. A plurality of sliding grooves 221b are formed on the side wall of the partition net 220 and are uniformly arranged along its circumferential direction. The plurality of sliders 223 are respectively slidably connected to the plurality of sliding grooves 221b. The slider 223 is in an L shape to limit the downward sliding position of the partition net 220.

[0029] In one embodiment, the lifting member 240 includes a plurality of oil cylinders and a connecting plate uniformly arranged along the circumferential direction of the main pipe 210. The connecting plate is fixedly connected to the main pipe 210. The output shafts of the plurality of oil cylinders are connected to the connecting plate, and the plurality of oil cylinders are arranged in a linkage manner.

[0030] To improve the connection stability between the partition net 220 and the main pipe 210, in one embodiment, the filter tank further includes a plurality of support rings 224 corresponding to the plurality of partition nets 220 one by one. The plurality of support rings 224 are respectively fixedly connected to the bottom of the corresponding partition net 220, and the inner wall of the support ring 224 is welded to the main pipe 210.

[0031] In one embodiment, the branch pipe 230 is horizontally arranged, and the number of openings is multiple. The multiple openings are arranged in sequence along the length direction of the branch pipe 230. The backwashing assembly 200 further includes a plurality of nozzles 231 installed at the multiple openings.

[0032] This implementation scheme further includes a water supply assembly 300 connected to the top end of the main pipe 210.

[0033] In one embodiment, the water supply assembly 300 includes a water storage tank 310 fixedly arranged above the tank body 100 and a corrugated pipe 320 connecting the water storage tank 310 and the main pipe 210. The water stored in the water storage tank 310 has a certain potential energy. During backwashing, the impact force on the filter media is greater, saving energy consumption. It should be noted that only relying on the potential energy of the water in the water storage tank 310, the impact effect on the filter media does not meet the standard. A booster pump can be set on the main pipe 210. Compared with the backwashing method of bottom water inlet, because the power of the booster pump required is smaller, it still has the effect of energy saving.

[0034] This implementation scheme further includes a first valve 121 installed on the water outlet pipe 120 and a second valve 330 installed between the water storage tank 310 and the corrugated pipe 320.

[0035] Compared with the prior art: The internal space of the tank body 100 is stratified by a plurality of partition meshes 220 provided. Along the vertically downward direction, a variety of filter media with gradually decreasing filter gaps formed can be sequentially placed in multiple filter cavities. During the backwashing process, water is supplied to the branch pipe 230 through the main pipe 210. A corresponding branch pipe 230 is provided at the bottom of each filter cavity. Compared with the bottom water inlet method, the multi-layer water inlet backwashing effect of this filter tank is good, and the filter media is cleaned more thoroughly.

[0036] The above is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A filter tank, characterized in that: Including tank and backwash components: The top of the tank body is provided with an inlet and outlet pipe, and the bottom of the tank body is provided with a water outlet pipe; The backwash assembly includes a vertically arranged main pipe, a plurality of partitions arranged in sequence along the vertical direction, and a plurality of branch pipes fixedly connected to the plurality of partitions respectively. The top of the main pipe is connected to an external water source, the bottom of the main pipe is closed and extends into the tank body through the plurality of partitions. The plurality of partitions divide the interior of the tank body into a plurality of filter chambers filled with filter media. At least one branch pipe is arranged under each of the partitions, one end of the branch pipe is closed, and the other end of the branch pipe is connected to the main pipe. The top of the branch pipe is open to guide the water flow in the main pipe to the filter media above it.

2. The filter tank according to claim 1, characterized in that: The partition net includes a partition plate and a filter net. A groove connecting two adjacent filter chambers is opened on the partition net. The filter net is embedded in the groove. The filter holes of the multiple filter nets gradually become smaller in the vertical downward direction. The branch pipe is built into the groove and is located below the corresponding filter net.

3. The filter tank according to claim 1, characterized in that: The main pipe is slidably connected to the tank body in the vertical direction. The backwashing assembly also includes a lifting member installed on the top of the tank body. The output end of the lifting member is connected to the main pipe to drive the main pipe to slide so that the filter material can reciprocate in the vertical direction.

4. The filter tank according to claim 3, characterized in that: It also includes a plurality of sliding blocks arranged on the inner wall along the circumference of the tank body, a plurality of sliding grooves evenly arranged along the circumference of the partition net are opened on the side wall of the tank body, the plurality of sliding blocks are respectively slidably connected to the plurality of sliding grooves, and the sliding block is L-shaped to limit the downward sliding position of the partition net.

5. The filter tank according to claim 3, characterized in that: The lifting member comprises a plurality of oil cylinders and a connecting plate evenly arranged along the circumference of the main pipe, the connecting plate is fixedly connected to the main pipe, the output shafts of the plurality of oil cylinders are connected to the connecting plate, and the plurality of oil cylinders are arranged in linkage.

6. The filter tank according to claim 1, characterized in that: It also includes a plurality of support rings corresponding to the plurality of partition nets one by one, the plurality of support rings are respectively fixedly connected to the bottom of the corresponding partition nets, and the inner wall of the support ring is welded to the main pipe.

7. The filter tank according to claim 1, characterized in that: The branch pipe is arranged horizontally, the number of the openings is multiple, and the multiple openings are arranged in sequence along the length direction of the branch pipe. The backwashing assembly also includes multiple nozzles installed at the multiple openings.

8. The filter tank according to claim 1, characterized in that: It also includes a water supply component connected to the top of the main pipe.

9. The filter tank according to claim 8, characterized in that: The water supply assembly comprises a water storage tank fixedly arranged above the tank body and a bellows connecting the water storage tank and the main pipe.

10. The filter tank according to claim 9, characterized in that: It also includes a first valve installed on the water outlet pipe, and a second valve installed between the water storage tank and the bellows.

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