Active sand filter for sewage quicksand filtration

Abstract

The utility model discloses an active sand filter for filtering sewage quicksand, and relates to the field of active sand filters. The device comprises a quicksand filter, an inlet / outlet, a limiting pipe and a filtering assembly. According to the active sand filter for filtering the sewage quicksand, the protection unit is arranged at the part, close to the limiting pipe, of the quicksand filter, so that the limiting pipe is separated from other environments in the quicksand filter, suspended solids in a water body or quicksand are prevented from entering the water outlet, and the flowing smoothness of the water body at the water outlet is ensured; and when suspended matters accumulated in the protection unit are cleaned, the quicksand filter does not need to be closed, so that the practicability is relatively good.

Description

Technical Field

[0001] The utility model relates to the technical field of active sand filters, in particular to an active sand filter for sewage flowing sand filtering. Background Art

[0002] In the prior art, an activated sand filter is used to filter the quicksand in sewage. The activated sand filter is based on the countercurrent principle, that is, the sewage is sprayed into the quicksand filter through the water inlet pipe and the water distributor, and then the water flows from bottom to top through the quicksand inside the quicksand filter, so that the quicksand filters and adsorbs impurities in the sewage. Then the filtered filtrate gathers at the top of the quicksand filter and enters the outlet through the limiting pipe to discharge the filtered water. The dirty sand accumulated at the bottom of the quicksand filter can be cleaned by a sand washer so that the quicksand can be reused.

[0003] There will inevitably be suspended matter in sewage, which will enter the outlet through the filtered water. Over a long period of time, it will block the outlet and affect the smooth discharge of the filtered water.

[0004] The main reason for the above problems is that the top end surface of the current quicksand filter is in a directly exposed state. Over a long period of time, dust and suspended matter in the external environment will fall on the water body gathered in the quicksand filter. In addition, the suspended matter carried in the sewage floats on the water body gathered in the quicksand filter under the action of buoyancy. When the filtered water body is discharged, the limit pipe in a directly exposed state cannot filter the suspended matter, causing the suspended matter to enter the water outlet with the water body. The diameter of the water outlet is small. Over a long period of time, the suspended matter with greater adhesion will block the water outlet, affecting the smooth discharge of the water body inside the activated sand filter in the later stage. To address the above problems, we propose an activated sand filter for quicksand filtration of sewage. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides an activated sand filter, which solves the problem that suspended matter inevitably exists in sewage. The suspended matter will enter the interior of the water outlet through the filtered water and will block the water outlet for a long time, affecting the smooth discharge of the filtered water.

[0006] To achieve the above purpose, the utility model is implemented through the following technical scheme: an activated sand filter for sewage flowing sand filtration, comprising:

[0007] A filter unit, comprising a quicksand filter and a filter assembly arranged inside the quicksand filter;

[0008] The inlet and outlet unit comprises a water inlet and a water outlet opened on the outer wall of the quicksand filter, and a limit tube for controlling the liquid level is arranged on the inner wall of the quicksand filter near the water outlet;

[0009] The protection unit comprises a first dust cover and a second dust cover arranged on the top end surface of the quicksand filter and a protection component arranged on the second dust cover for filtering and protecting water before it enters the limiting pipe.

[0010] Preferably, the protection component comprises:

[0011] A metal mesh cover connected to the second dust cover, the metal mesh cover is used to block and protect the pipe opening of the limit pipe;

[0012] A top cover, which is arranged on the top end surface of the metal mesh cover;

[0013] The scraper is slidably arranged on the inner wall of the metal mesh cover, and the scraper is connected to the top cover.

[0014] Preferably, a connecting rod is provided between the top end surface of the scraper and the bottom end surface of the top cover, and a connecting hole for installing a metal mesh cover is provided on the top end surface of the second dust cover.

[0015] Preferably, a positioning groove is provided on the top end surface of the second dust cover, a positioning plate matching the positioning groove is provided on the outer wall of the metal mesh cover, a positioning screw is provided on the inner bottom of the positioning groove, and the positioning plate is sleeved on the outer wall of the positioning screw.

[0016] Preferably, a locking screw is rotatably connected to the top end surface of the top cover, and one end of the locking screw is threadedly inserted into the interior of the positioning plate.

[0017] Preferably, the filter assembly comprises:

[0018] A water inlet pipe connected to the water inlet, wherein a water distributor is provided at the bottom end of the water inlet pipe;

[0019] A sand conveying pipe connected to the water inlet pipe, the inner wall of the quicksand filter is provided with a bracket for supporting the sand conveying pipe and the water inlet pipe;

[0020] A pump body connected to the bottom end of the sand conveying pipe;

[0021] A sand washer is connected to one end of the sand conveying pipe close to the bracket.

[0022] Preferably, the outer wall of the positioning screw is threadedly sleeved with a nut for locking the positioning screw and the positioning plate.

[0023] The utility model discloses an activated sand filter for sewage quicksand filtering, which has the following beneficial effects: the activated sand filter for sewage quicksand filtering is provided with a protection unit at a position of the quicksand filter close to a limit pipe, thereby separating the limit pipe from other environments inside the quicksand filter, preventing suspended matter in the water body or quicksand from entering the inside of a water outlet, ensuring smooth flow of water at the water outlet, and when cleaning suspended matter accumulated inside the protection unit, there is no need to close the quicksand filter, and the utility model has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0026] Figure 2 This is a cross-sectional view of the internal structure of the quicksand filter of the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the filter assembly of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the limit tube and the metal mesh cover of the utility model;

[0029] Figure 5 This is an exploded view of the metal mesh cover, scraper and top cover structure of the utility model;

[0030] Figure 6 It is a schematic diagram of the dust cover and the connecting hole structure of the utility model.

[0031] In the figure, 1. quicksand filter; 101. water inlet; 102. water outlet; 103. limit pipe; 2. water inlet pipe; 201. water distributor; 202. sand conveying pipe; 203. bracket; 204. pump body; 205. sand washer; 3. protection unit; 301. first dust cover; 302. second dust cover; 303. protection assembly; 3031. metal mesh cover; 3032. top cover; 3033. connecting rod; 3034. scraper; 304. connecting hole; 305. positioning plate; 306. positioning groove; 307. positioning screw; 308. locking screw. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] The embodiment of the present application solves the problem that suspended matter inevitably exists in sewage by providing an activated sand filter. The suspended matter will enter the interior of the water outlet through the filtered water body, and will block the water outlet for a long time, affecting the smooth discharge of the filtered water body, thereby achieving the filtration and cleaning of suspended matter in the water body.

[0034] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] The utility model embodiment discloses an active sand filter for sewage flowing sand filtering.

[0036] According to the attached Figure 1-6 As shown, the filtering unit includes a quicksand filter 1 and a filtering component arranged inside the quicksand filter 1, an inlet and outlet unit, including a water inlet 101 and a water outlet 102 opened on the outer wall of the quicksand filter 1, and the inner wall of the quicksand filter 1 near the water outlet 102 is provided with a limiting tube 103 for controlling the liquid level, that is, the top end surface of the limiting tube 103 is flush with the highest position of the liquid level, the filtering component includes a water inlet pipe 2, the water inlet pipe 2 is connected to the water inlet 101, a water distributor 201 is provided at the bottom end of the water inlet pipe 2, a sand conveying pipe 202 is connected to the water inlet pipe 2, the sand conveying pipe 202 is not connected to the inside of the water inlet pipe 2, and the sand conveying pipe 202 and the water inlet pipe 2 are only sleeved together, and the inner wall of the quicksand filter 1 is provided with a member for supporting the sand conveying pipe 202 and The bracket 203 of the water inlet pipe 2, the pump body 204 is connected to the bottom end of the sand conveying pipe 202, the sand washer 205 is connected to the end of the sand conveying pipe 202 close to the bracket 203, and the quicksand filter 1, the inlet and outlet, the limit pipe 103 and the filter assembly and other components form a model of xxds-6 continuous quicksand filter. When the equipment is in use, the sewage enters the interior of the water inlet pipe 2 through the water inlet 101, and is sprayed on the interior of the quicksand filter 1 through the water distributor 201. Then the water flows from bottom to top through the quicksand inside the quicksand filter 1, so that the quicksand filters and absorbs impurities in the sewage. Then the filtered filtrate gathers at the top of the quicksand filter 1 and enters the interior of the water outlet 102 through the limit pipe 103, so as to discharge the filtered water.

[0037] The dirty sand accumulated at the bottom of the quicksand filter 1 is pumped into the sand conveying pipe 202 through the pump body 204, and moves to the inside of the sand washer 205 through the sand conveying pipe 202, so that the sand washer 205 cleans the dirty sand, and the cleaned dirty sand is directly sprayed into the quicksand filter 1.

[0038] The protection unit 3 includes a first dust cover 301 and a second dust cover 302 arranged on the top end surface of the quicksand filter 1, and a protection component 303 arranged on the second dust cover 302 for filtering and protecting the water body before entering the limiting tube 103. The two sets of dust covers are mainly used to prevent impurities in the external environment from falling into the filtered water body. The protection component 303 is mainly used to prevent suspended matter in the water body or quicksand from entering the inside of the water outlet 102. The protection component 303 includes a metal mesh cover 3031, which is connected to the second dust cover 302. The metal mesh cover 3031 is used to block and protect the pipe mouth of the limiting tube 103. The outer wall of the metal mesh cover 3031 is composed of small holes. The outer wall of the mesh cover 3031 fits with the inner wall of the quicksand filter 1, that is, the metal mesh cover 3031 separates the limit tube 103 from other environments inside the quicksand filter 1, the top cover 3032 is covered on the top end surface of the metal mesh cover 3031, the scraper 3034 is slidably set on the inner wall of the metal mesh cover 3031, the scraper 3034 is connected to the top cover 3032, a connecting rod 3033 is set between the top end surface of the scraper 3034 and the bottom end surface of the top cover 3032, and a connecting hole 304 for installing the metal mesh cover 3031 is opened on the top end surface of the second dust cover 302, and the suspended matter accumulated inside the metal mesh cover 3031 can be cleaned by the scraper 3034.

[0039] A positioning groove 306 is provided on the top end face of the second dust cover 302, and a positioning plate 305 matching the positioning groove 306 is provided on the outer wall of the metal mesh cover 3031, and a positioning screw 307 is provided on the inner bottom of the positioning groove 306. The positioning plate 305 is sleeved on the outer wall of the positioning screw 307, and a nut for locking the positioning screw 307 and the positioning plate 305 is threadedly sleeved on the outer wall of the positioning screw 307. The top end face of the top cover 3032 is rotatably connected with a locking screw 308, and one end of the locking screw 308 is threadedly inserted into the interior of the positioning plate 305.

[0040] The activated sand filter for sewage quicksand filtration is characterized in that a protection unit 3 is arranged at a position of the quicksand filter 1 close to the limit pipe 103, thereby separating the limit pipe 103 from other environments inside the quicksand filter 1, preventing suspended matter in the water or quicksand from entering the inside of the water outlet 102 controlled by the limit pipe 103, thereby ensuring smooth flow of water at the water outlet 102, and when cleaning suspended matter accumulated inside the protection unit 3, there is no need to close the quicksand filter 1, and the practicality is good.

[0041] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An activated sand filter for sewage flowing sand filtration, comprising: A filter unit comprises a quicksand filter (1) and a filter assembly arranged inside the quicksand filter (1); The inlet and outlet unit comprises a water inlet (101) and a water outlet (102) provided on the outer wall of the quicksand filter (1), wherein a limit tube (103) for controlling the liquid level is provided on the inner wall of the quicksand filter (1) near the water outlet (102); It is characterized in that The protection unit (3) comprises a first dust cover (301) and a second dust cover (302) arranged on the top end surface of the quicksand filter (1), and a protection component (303) arranged on the second dust cover (302) for filtering and protecting water before it enters the interior of the limiting pipe (103).

2. The activated sand filter for sewage quicksand filtration according to claim 1, characterized in that: The protection component (303) comprises: A metal mesh cover (3031) connected to the second dust cover (302), the metal mesh cover (3031) being used to block and protect the pipe opening of the limiting pipe (103); A top cover (3032) is provided on the top end surface of the metal mesh cover (3031); The scraper (3034) is slidably disposed on the inner wall of the metal mesh cover (3031), and the scraper (3034) is connected to the top cover (3032).

3. The activated sand filter for sewage quicksand filtration according to claim 2, characterized in that: A connecting rod (3033) is provided between the top end surface of the scraper (3034) and the bottom end surface of the top cover (3032), and a connecting hole (304) for installing the metal mesh cover (3031) is provided on the top end surface of the second dust cover (302).

4. The activated sand filter for sewage quicksand filtration according to claim 3, characterized in that: A positioning groove (306) is provided on the top end surface of the second dust cover (302), a positioning plate (305) adapted to the positioning groove (306) is provided on the outer wall of the metal mesh cover (3031), a positioning screw (307) is provided at the inner bottom of the positioning groove (306), and the positioning plate (305) is sleeved on the outer wall of the positioning screw (307).

5. The activated sand filter for sewage quicksand filtration according to claim 4, characterized in that: The top end surface of the top cover (3032) is rotatably connected with a locking screw (308), and one end of the locking screw (308) is threadedly inserted into the interior of the positioning plate (305).

6. The activated sand filter for sewage quicksand filtration according to claim 1, characterized in that: The filter assembly comprises: A water inlet pipe (2) connected to the water inlet (101), wherein a water distributor (201) is provided at the bottom end of the water inlet pipe (2); A sand conveying pipe (202) connected to the water inlet pipe (2), wherein the inner wall of the quicksand filter (1) is provided with a bracket (203) for supporting the sand conveying pipe (202) and the water inlet pipe (2); A pump body (204) connected to the bottom end of the sand transport pipe (202); The sand washer (205) is connected to one end of the sand conveying pipe (202) close to the bracket (203).

7. The activated sand filter for sewage quicksand filtration according to claim 4, characterized in that: The outer wall of the positioning screw (307) is threadedly sleeved with a nut for locking the positioning screw (307) and the positioning plate (305).

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