Pre-filter capable of being cleaned

Abstract

A prefilter capable of being cleaned belongs to the technical field of filtering equipment and comprises a cavity, a water inlet pipe is connected to the upper portion of the left side of the cavity, a water outlet pipe is connected to the upper portion of the right side of the cavity, a sewage outflow pipe with a valve is connected to the lower portion of the cavity, the cavity comprises a filter, the upper end of the filter is connected with the water inlet pipe, and a filter outlet is formed in the lower end of the filter; the runner layer is positioned between the cavity and the filter; the upper part of the flow channel layer is communicated with the water outlet pipe; a filter outlet is formed above the pollution discharge area, and a sewage outflow pipe is arranged below the pollution discharge area; and when the valve is in an opening and closing state, sediments in the filter reach the pollution discharge area through the outlet of the filter, and then are discharged through the sewage outflow pipe. Aiming at the problem that impurities at a water inlet cannot be completely removed in the conventional backwashing, the utility model provides a prefilter which flushes the impurities out of a sewage outflow pipe in a high-flow and high-pressure manner through a water inlet pipe.

Description

Technical Field

[0001] This application belongs to the technical field of filtering devices, and particularly relates to a pre-filter that can be cleaned. Background Art

[0002] A filter is an indispensable device on the pipeline for transporting the medium, which is convenient for filtering impurities in the medium and avoiding impacts such as blockage on the downstream processing links. Traditional filters usually consist of a cylinder body, a stainless steel filter screen, a sewage discharge part, a transmission device, and an electrical control part. Among them, the filtration of some filters cannot filter out all impurities, and when performing backwashing, all impurities in the filter cannot be washed clean.

[0003] In the published document with the publication number CN220834485U and the name of a filter with an automatic sewage discharge and backwashing function, it includes a housing. One end of the housing is connected with a water inlet pipe, and a backwashing pipe is connected to the water inlet pipe. A first valve is connected to the backwashing pipe. A second valve is connected between the water inlet pipe and the backwashing pipe and the housing. The other end of the housing is connected with a water outlet pipe, and a third valve is connected to the water outlet pipe. The other end of the backwashing pipe is connected to the water outlet pipe. A partition is connected to the housing near the water inlet pipe side. A filter cylinder is rotatably connected between the end of the partition far from the water inlet pipe and the housing. A number of filter holes are connected to the filter cylinder. A number of water passing holes are connected to the partition in the circumferential direction of the filter cylinder. A number of sewage collection tanks are connected to the housing at the bottom end of the filter cylinder. A sewage discharge pipe is connected to the bottom end of the sewage collection tank, and a fourth valve is connected to the sewage discharge pipe.

[0004] In the publicly disclosed technical solutions of the prior art, the backwashing effect of the backwashing pipe on the partition and the water passing holes is poor. Because it is backwashed from bottom to top, the sundries on the partition will enter the space between the second valve and the partition. After the backwashing pipeline is closed and the second valve is opened, the sundries in this space are still on the partition, so they cannot be cleaned clean. Utility Model Content

[0005] The purpose of the present utility model is to provide a pre-filter that flushes sundries out of the sewage outflow pipe in a large flow rate and high pressure manner through the water inlet pipe for the problem that the existing backwashing cannot completely remove the sundries at the water inlet.

[0006] In order to achieve the above technical purpose, the following technical solution is now provided. A pre-filter that can be cleaned includes a cavity. The upper left side of the cavity is connected with a water inlet pipe, the upper right side of the cavity is connected with a water outlet pipe, the lower part of the cavity is connected with a sewage outflow pipe with a valve. The cavity includes a filter. The upper end of the filter is connected with the water inlet pipe, and the lower end is provided with a filter outlet.

[0007] The flow channel layer is located between the cavity and the filter; there is a sewage discharge area below the flow channel layer, which is connected to the water outlet pipe above; and there is a filter outlet above the sewage discharge area and a sewage outlet pipe below.

[0008] When the valve is in the open or closed state, the sediment in the filter reaches the sewage discharge area through the filter outlet, and then the sediment is discharged through the sewage outlet pipe.

[0009] In an implementable manner, an extension section of a water inlet pipe is provided in the filter, and several filter layers are stacked between the extension section and the filter outlet, and the extension section presses and fixes the filter layers.

[0010] In an implementable manner, several diversion holes are provided on the filter layer, and each filter layer rotates by an angle in the horizontal plane so that the diversion holes form a spiral pipeline.

[0011] In an implementable manner, several liquid outlet holes are provided on the lower part of the side wall of the filter, and the liquid outlet holes are located near the position of the stacked filter layers.

[0012] In an implementable manner, a limit cover is provided at the filter outlet, and a spring member located in the sewage discharge area is provided on the limit cover, and the spring member supports and seals the limit cover on the cavity.

[0013] In an implementable manner, a flow limiting member is provided in the flow channel layer, and the flow limiting member is located at the upper part of the side wall of the filter and above the liquid outlet holes.

[0014] The utility model has the following beneficial effects compared with the prior art:

[0015] In this application, the backwash pipe structure is deleted, preventing debris on the filter from being washed back into the water inlet pipe opening. By opening the sewage outlet pipe, the filter substances in the filter are directly flushed out of the entire filter by high-flow liquid. Moreover, in the technical solution of this application, a spiral filter layer is added. Firstly, it enables water to pass through the filter layer quickly. Secondly, it enables debris to be adsorbed in the spiral pipeline and flow along the pipeline. The setting of the flow limiting member can also prevent debris flowing out of the filter layer from entering the water outlet pipe. And when the sewage outlet pipe is opened, an elastic seal is provided at the filter outlet, so the water in the flow channel layer will flow out first, and the flow limiting member will also prevent the water in the water outlet pipe from flowing back into the flow channel layer. Description of the Drawings

[0016] 1 Cavity, 2 Water inlet pipe, 3 Water outlet pipe, 4 Sewage outlet pipe, 5 Filter, 6 Filter outlet, 7

[0017] Flow channel layer,

[0018] 21 Extension section, 41 Valve, 51 Liquid outlet hole, 61 Filter layer, 62 Diversion hole, 63 Limit cover, 64 Spring member, 71 Sewage discharge area

[0019] Figure 1 is the overall structural schematic diagram of this embodiment;

[0020] Figure 2 is Figure 1 the front view of the water inlet pipe;

[0021] Figure 3 is Figure 2 the sectional view taken along line A-A in;

[0022] Figure 4 is the structural schematic diagram of the filter;

[0023] Figure 5 is Figure 4 the side view of the filter;

[0024] Figure 6 is Figure 5 the sectional view taken along line B-B in; Specific implementation manners

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0026] As Figure 1 and Figure 2 shown in the embodiment, a pre-filter capable of cleaning includes a cavity 1. The upper left side of the cavity 1 is connected with a water inlet pipe 2, the upper right side of the cavity 1 is connected with a water outlet pipe 3, and the lower part of the cavity 1 is connected with a sewage outflow pipe 4 with a valve 41. The cavity 1 includes a filter 5. The upper end of the filter 5 is connected with the water inlet pipe 2, and the lower end is provided with a filter outlet 6.

[0027] In this embodiment, as Figures 4 to 6 shown, the filter 5 has an extension section 21 of the water inlet pipe 2. Between the extension section 21 and the filter outlet 6, several layers of filter layers 61 are stacked, and the extension section 21 presses and fixes the filter layers 61. Among them, a number of diversion holes 62 are provided on the filter layer 61, and each layer of filter layer 61 rotates by an angle in the horizontal plane, so that the diversion holes 62 form a spiral pipeline.

[0028] In this embodiment, a plurality of liquid outlet holes 51 are provided on the lower part of the side wall of the filter 5, and the liquid outlet holes 51 are located near the position of the stacked filter layers 61.

[0029] As Figure 3 shown, it further includes a flow channel layer 7, and the flow channel layer 7 is located between the cavity 1 and the filter 5; there is a sewage discharge area 71 below the flow channel layer 7, and it is connected to the water outlet pipe 3 above; and there is a filter outlet 6 on the upper surface of the sewage discharge area 71, and a sewage outlet pipe 4 on the lower surface. Among them, a flow limiting member is provided in the flow channel layer 7, and the flow limiting member is located on the upper part of the side wall of the filter 5 and above the liquid outlet holes 51.

[0030] In this embodiment, a limit cover 63 is provided at the filter outlet 6, and a spring member 64 located in the sewage discharge area 71 is provided on the limit cover 62, and the spring member 63 supports and closes the limit cover 62 on the cavity 1. In this embodiment, the spring member 63 is fixed on the cavity 1, that is, welded to the inner surface of the sewage discharge area 71 of the sewage outlet pipe 4.

[0031] In this embodiment, when the valve 41 is closed, the liquid in the water inlet pipe 2 directly enters the filter layer 61 through the extension section 21, and the liquid quickly enters the filter outlet 6 through the diversion holes 62. In order to prevent the liquid flow rate from being too slow or too fast, a limit cover 63 is provided at the filter outlet 6. When the pressure in the filter 5 reaches a certain level, the liquid flushes open the limit cover 63 and enters the flow channel layer 7. In this process, most of the coarse-grained debris will be adsorbed on the filter layer 61 in the pipeline. The liquid in the flow channel layer 7 enters the water outlet pipe 3 after passing through the flow limiting member. In this process, part of the debris overflowing from the limit cover 63 will be adsorbed by the flow limiting member. In this embodiment, after secondary filtration by the filter layer 61 and the flow limiting member, the filtration effect is better than that of the prior art.

[0032] When the valve 41 is in the open and closed state, the sediment in the filter 5 reaches the sewage discharge area 71 through the filter outlet 6, and then the sediment is discharged by the sewage outlet pipe 4. The water output of the valve 41 is much larger than the outflow of the water outlet pipe 3. Therefore, once the valve 41 is opened, the liquid in the flow channel layer 7 first flows out from the filter outlet 6, and all the overflowing debris will be taken away when flowing out; for the debris adsorbed on the flow limiting member, the method of replacing the adsorbent can be adopted for cleaning. Because in this embodiment, the cavity 1 is divided into an upper pipeline installation part and a lower filter 5 placement part, and a rubber part is provided between them and is buckled and sealed. Then when the water flow in the filter 5 flushes open the limit cover 63, the debris in the filter 5 is cleaned.

[0033] The above will clearly and completely describe the concept, specific structure and technical effects of the present utility model in combination with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model. In addition, all the connection / linkage relationships mentioned in the text do not simply refer to the direct connection of components, but refer to the formation of a more optimal connection structure by adding or reducing connection accessories according to the specific implementation situation.

[0034] The above specific description of the present utility model in the embodiments is only used to further illustrate the present utility model and cannot be understood as a limitation on the protection scope of the present utility model. Any non-essential improvements and adjustments made by those skilled in the art to the present utility model based on the content of the above utility model all fall within the protection scope of the present utility model.

Claims

1. A pre-filter capable of being cleaned, comprising a cavity (1), wherein the upper left portion of the cavity (1) is connected to a water inlet pipe (2), the upper right portion of the cavity (1) is connected to a water outlet pipe (3), and the lower portion of the cavity (1) is connected to a sewage outflow pipe (4) with a valve (41), It is characterized in that The cavity (1) comprises a filter (5), the upper end of the filter (5) is connected to the water inlet pipe (2), and the lower end is provided with a filter outlet (6); A flow channel layer (7), the flow channel layer (7) being located between the cavity (1) and the filter (5); the flow channel layer (7) having a sewage discharge area (71) below and being connected to the water outlet pipe (3) above; and the sewage discharge area (71) having the filter outlet (6) above and the sewage outflow pipe (4) below; When the valve (41) is in an open or closed state, the sediment in the filter (5) reaches the sewage discharge area (71) through the filter outlet (6), and is then discharged through the sewage outflow pipe (4).

2. The cleanable pre-filter according to claim 1, characterized in that: The filter (5) has an extension section (21) of the water inlet pipe (2) inside, and a plurality of filter layers (61) are stacked between the extension section (21) and the filter outlet (6), and the extension section (21) presses down and fixes the filter layer (61).

3. The cleanable pre-filter according to claim 2, characterized in that: A plurality of flow guide holes (62) are arranged on the filter layer (61), and each filter layer (61) is rotated by an angle in a horizontal plane so that the flow guide holes (62) form a spiral pipeline.

4. The cleanable pre-filter according to claim 2 or 3, characterized in that: A plurality of liquid outlet holes (51) are provided on the lower part of the side wall of the filter (5), wherein the liquid outlet holes (51) are located near the position of the stacked filter layers (61).

5. The cleanable pre-filter according to claim 1, characterized in that: The filter outlet (6) is provided with a limit cover (63), and the limit cover (63) is provided with a spring member (64) located in the sewage discharge area (71), and the spring member (64) supports and closes the limit cover (63) on the cavity (1).

6. The cleanable pre-filter according to claim 4, characterized in that: A flow limiting component is arranged in the flow channel layer (7), and the flow limiting component is located at the upper part of the side wall of the filter (5) and above the liquid outlet hole (51).

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