A continuous flow sand filter

Abstract

The utility model relates to water treatment technical field discloses a kind of continuous flow sand filter, including filter body, the top of filter body is provided with pneumatic sand pump, the bottom of pneumatic sand pump is provided with sand washer, the bottom of sand washer is provided with sand-water flow divider sleeve, the bottom of sand-water flow divider sleeve is provided with water distributor, the inside of water distributor is inserted with connecting block, the sidewall of connecting block is fixedly connected with branch pipe, the bottom of water distributor is provided with sand distributor, the bottom of sand distributor is provided with air-lift pump.In the utility model, through the setting of water distributor, branch pipe, connecting block, locating block, locating plate and positioning spring, the effect of individually disassembling and replacing the branch pipe is satisfied, damage of the branch pipe during long-term use is avoided, and the entire replacement is required to cause resource waste, which is conducive to disassembling the single branch pipe, and improving the working efficiency of the filter.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a continuous flow sand filter. Background Technology

[0002] Continuous flow sand filters are high-efficiency filtration devices that integrate coagulation, clarification, and filtration. Based on the principle of upflow fluidized bed countercurrent and a single homogeneous filter media, they can effectively remove suspended solids and colloidal substances from water. Continuous flow sand filters can perform filtration and sand washing simultaneously, and can operate continuously and automatically 24 hours a day without the need for backwashing. They can be widely used in various water treatment processes, especially for industrial process water, as well as for the deep or purification treatment of sewage and industrial wastewater.

[0003] The existing technology has the following drawbacks: In the use of some existing continuous flow sand filters, the water distributor branch pipes wear and become damaged during long-term use. After the water distributor branch pipes are damaged, the entire water distributor needs to be replaced, resulting in waste of water distributor resources and reducing the working efficiency of the continuous flow sand filter. Therefore, a continuous flow sand filter is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a continuous flow sand filter, which aims to improve the problem in the prior art where the entire water distributor needs to be replaced after the branch pipe of the water distributor is damaged, resulting in waste of water distributor resources and reduced filter working efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a continuous flow sand filter, comprising a filter body, a pneumatic sand lifting pump at the top of the filter body, a sand washer at the bottom of the pneumatic sand lifting pump, a sand and water diverter sleeve at the bottom of the sand washer, a water distributor at the bottom of the sand and water diverter sleeve, a connecting block inserted into the inside of the water distributor, a branch pipe fixedly connected to the side wall of the connecting block, a sand distributor at the bottom of the water distributor, an air lifting pump at the bottom of the sand distributor, a positioning mechanism at the top of the water distributor, a cleaning component on the side wall of the branch pipe, a water inlet on the side wall of the filter body, a flushing water outlet on the side wall of the filter body, a water inlet pipe on the side wall of the flushing water outlet, and filtrate on the side wall of the filter body;

[0006] The positioning mechanism includes a positioning block, the bottom of which is rotatably connected to the top of the water distributor, and a positioning plate is fixedly connected to the top of the water distributor. The side wall of the positioning block is elastically connected to the side wall of the positioning plate through a positioning spring.

[0007] As a further description of the above technical solution:

[0008] The cleaning assembly includes a connecting frame, the side wall of which is fixedly connected to the side wall of the branch pipe, a movable rod is slidably connected inside the connecting frame, the end of the movable rod is elastically connected to the side wall of the connecting frame through a return spring, and a cleaning plate is fixedly connected to the other end of the movable rod.

[0009] As a further description of the above technical solution:

[0010] The water distributor has multiple T-shaped grooves inside, and the multiple T-shaped grooves are of equal size and are distributed in a ring array inside the water distributor.

[0011] As a further description of the above technical solution:

[0012] The connecting block is T-shaped and is inserted into the inside of the T-shaped groove.

[0013] As a further description of the above technical solution:

[0014] A fixing block is provided on the top of the connecting block, and the fixing block is arc-shaped.

[0015] As a further description of the above technical solution:

[0016] The bottom of the positioning block is provided with an arc-shaped fixing groove, and the fixing block is inserted into the inside of the arc-shaped fixing groove.

[0017] As a further description of the above technical solution:

[0018] The connecting frame has a connecting hole inside, and the moving rod passes through and is slidably connected in the connecting hole.

[0019] As a further description of the above technical solution:

[0020] A cleaning pad is provided on the top of the cleaning plate, and the top of the cleaning pad is fixedly connected to the bottom of the branch pipe.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the water distributor, branch pipe, connecting block, positioning block, positioning plate and positioning spring are designed to allow for individual disassembly and replacement of the branch pipe. This avoids the situation where the branch pipe is damaged during long-term use and needs to be replaced as a whole, which would be a waste of resources. It is also beneficial to allow for disassembly of individual branch pipes and improve the working efficiency of the filter.

[0023] 2. In this utility model, the arrangement of water distributor, branch pipe, connecting block, connecting frame, moving rod, reset spring and cleaning plate achieves the effect of cleaning the bottom of the branch pipe, avoiding blockage after long-term use, which would lead to uneven water distribution by the water distributor, and helps to improve the cleanliness of the branch pipe during use. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the filter body of a continuous flow sand filter proposed in this utility model;

[0025] Figure 2 This is a cross-sectional view of the filter body of a continuous flow sand filter proposed in this utility model;

[0026] Figure 3 This is an exploded structural diagram of the water distributor, connecting block, and branch pipe of a continuous flow sand filter proposed in this utility model.

[0027] Figure 4 This utility model proposes a continuous flow sand filter. Figure 3 Enlarged schematic diagram of the internal structure of part A in the middle;

[0028] Figure 5 This is a schematic diagram of the bottom structure of the connecting block, branch pipe and cleaning mechanism of a continuous flow sand filter proposed in this utility model.

[0029] Legend:

[0030] 1. Filter body; 2. Inlet pipe; 3. Pneumatic sand lifting pump; 4. Sand washer; 5. Sand diverter sleeve; 6. Water distributor; 7. Branch pipe; 8. Sand distributor; 9. Air lift pump; 10. Connecting block; 11. Positioning mechanism; 111. Positioning block; 112. Positioning plate; 113. Positioning spring; 12. Cleaning assembly; 121. Connecting frame; 122. Moving rod; 123. Return spring; 124. Cleaning plate; 13. Water inlet; 14. Rinse water outlet; 15. Filtrate. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1-3The present invention provides an embodiment of a continuous flow sand filter, comprising a filter body 1, a pneumatic sand lifting pump 3 at the top of the filter body 1, the pneumatic sand lifting pump 3 using compressed air as a power source to efficiently lift the sand particles deposited inside the filter body 1, avoiding long-term accumulation of sand particles that affects filtration efficiency, a sand washer 4 at the bottom of the pneumatic sand lifting pump 3, the sand washer 4 having multiple layers of filter screens and a spray structure inside, which can clean the sand particles delivered by the pneumatic sand lifting pump 3 and remove impurities attached to the surface of the sand particles, a sand-water diverter sleeve 5 at the bottom of the sand-water diverter sleeve 5, and a water distributor 6 at the bottom of the sand-water diverter sleeve 5, which can evenly disperse the water to be filtered into the filtration area below, ensuring full utilization of the filtration area;

[0033] Furthermore, the water distributor 6 has multiple T-shaped grooves inside, which are of equal size and arranged in a circular array inside the water distributor 6. The T-shaped grooves have through holes, through which the liquid inside the water distributor 6 is transported. A connecting block 10 is inserted into the water distributor 6. The connecting block 10 is T-shaped and is inserted into the T-shaped groove. The side wall of the connecting block 10 has a connecting hole that contacts the through hole. The arrangement of the T-shaped grooves and the connecting block 10 allows the water distributor 6 to transport the liquid inside to the connecting block 10. A fixing block is provided on the top of the connecting block 10. The fixing block is arc-shaped. A branch pipe 7 is fixedly connected to the side wall of the connecting block 10. The liquid inside the water distributor 6 is transported to the branch pipe 7 through the connecting hole. The liquid inside the branch pipe 7 is discharged through the drain hole at the bottom of the branch pipe 7.

[0034] Furthermore, a sand distributor 8 is installed at the bottom of the water distributor 6, corresponding vertically to the water distributor 6. The sand distributor 8 evenly spreads the cleaned sand particles onto the surface of the filter layer, forming a stable filter media layer to intercept impurities in the water. An air lift pump 9 is installed at the bottom of the sand distributor 8, and a positioning mechanism 11 is installed at the top of the water distributor 6. This mechanism is mainly used to lift the water below the sand distributor 8 and assist in adjusting the water flow speed and pressure within the filtration system. A cleaning component 12 is installed on the side wall of the branch pipe 7, and a water inlet 13 is opened on the side wall of the filter body 1. A flow control valve is installed at the filter body 1, allowing staff to adjust the inlet water flow according to filtration needs and prevent the inlet water from exceeding the filter's processing capacity. A flushing port 14 is provided on the side wall of the filter body 1. The flushing port 14 is mainly used to inject high-pressure water during the backwashing stage of the filter to flush away impurities trapped in the filter media and restore filtration performance. An inlet pipe 2 is provided on the side wall of the flushing port 14, and a filtrate 15 is provided on the side wall of the filter body 1. A water quality detection sensor is installed at the outlet of the filtrate 15 to monitor the purity of the filtered water in real time.

[0035] Reference Figures 3-4The positioning mechanism 11 includes a positioning block 111. The bottom of the positioning block 111 is rotatably connected to the top of the water distributor 6. The positioning block 111 rotates on the top of the water distributor 6 through a bearing. The bottom of the positioning block 111 has an arc-shaped fixing groove. The fixing block is inserted into the arc-shaped fixing groove. The fixing block and the fixing groove are designed to ensure that the positioning block 111 is stably limited after being inserted into the water distributor 6. The top of the water distributor 6 is fixedly connected to a positioning plate 112. The side wall of the positioning block 111 is elastically connected to the side wall of the positioning plate 112 through a positioning spring 113. Pushing the positioning block 111 compresses the positioning spring 113, causing the positioning spring 113 to deform. When resetting, the rebound of the positioning spring 113 causes the positioning block 111 to slide and reset.

[0036] Reference Figures 3-5 The cleaning component 12 includes a connecting frame 121. The side wall of the connecting frame 121 is fixedly connected to the side wall of the branch pipe 7 using a welding process, ensuring the strong connection between the connecting frame 121 and the branch pipe 7. A movable rod 122 is slidably connected inside the connecting frame 121. A connecting hole is provided inside the connecting frame 121, through which the movable rod 122 passes and is slidably connected. The connecting hole allows the movable rod 122 to slide stably inside the connecting frame 121. The end of the movable rod 122 is connected by a return spring 1. 23 is elastically connected to the side wall of the connecting frame 121. After pushing the moving rod 122, it squeezes the return spring 123, causing the return spring 123 to deform. During reset, the rebound of the return spring 123 drives the moving rod 122 to slide and reset. The other end of the moving rod 122 is fixedly connected to a cleaning plate 124. A cleaning pad is provided on the top of the cleaning plate 124. The top of the cleaning pad is fixedly connected to the bottom of the branch pipe 7. The cleaning pad is used to clean the bottom of the branch pipe 7, improving the cleanliness of the branch pipe 7 during use.

[0037] Working principle: During use, raw water enters from the bottom of the filter body 1 and passes through the quartz sand filter bed inside the filter body 1 from bottom to top. The pores of the sand layer trap suspended solids, colloids and other impurities in the water. The filtered clean water is discharged from the top. As filtration proceeds, the impurities in the bottom sand layer increase. The dirty sand is pumped to the top sand washer 4 by the air lift pump 9. The sand washer 4 uses recycled water to spray and wash the dirty sand to remove the attached impurities. The wastewater generated is discharged directly. The clean sand falls back to the top of the filter bed by gravity and participates in filtration again. The water distributor 6 and branch pipes 7 are set to distribute the water flow evenly, so that the sand particles in each area of ​​the filter bed can trap impurities evenly. The entire process of "dirty sand lifting-washing-clean sand falling" is synchronized with filtration, forming a closed loop and realizing 24-hour continuous operation.

[0038] When the branch pipe 7 is worn and damaged after long-term use, the positioning block 111 is rotated and the positioning spring 113 is squeezed, causing the positioning spring 113 to deform and the connecting block 10 is pulled out from the inside of the water distributor 6, which satisfies the disassembly of a single branch pipe 7 and improves the uniformity of the water distributor 6 and branch pipe 7 during use.

[0039] When the branch pipe 7 becomes clogged after prolonged use, pushing the moving rod 122 will squeeze the reset spring 123 and drive the cleaning plate 124 to move. The cleaning plate 124 will clean the bottom of the branch pipe 7 during the movement, thus preventing the branch pipe 7 from becoming clogged due to prolonged use, which would lead to uneven water distribution and reduced water production, thereby improving the uniformity of water distribution in the branch pipe 7.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A continuous flow sand filter, comprising a filter body (1), characterized in that: A pneumatic sand-lifting pump (3) is installed at the top of the filter body (1), a sand washer (4) is installed at the bottom of the pneumatic sand-lifting pump (3), a sand washer (5) is installed at the bottom of the sand washer (4), a water distributor (6) is installed at the bottom of the sand washer (5), a connecting block (10) is inserted into the inside of the water distributor (6), a branch pipe (7) is fixedly connected to the side wall of the connecting block (10), and a sand distributor (8) is installed at the bottom of the water distributor (6). An air lift pump (9) is provided at the bottom of the sand distributor (8), a positioning mechanism (11) is provided at the top of the water distributor (6), a cleaning component (12) is provided on the side wall of the branch pipe (7), a water inlet (13) is provided on the side wall of the filter body (1), a flushing water outlet (14) is provided on the side wall of the filter body (1), a water inlet pipe (2) is provided on the side wall of the flushing water outlet (14), and a filtrate (15) is provided on the side wall of the filter body (1). The positioning mechanism (11) includes a positioning block (111), the bottom of which is rotatably connected to the top of the water distributor (6), and a positioning plate (112) is fixedly connected to the top of the water distributor (6). The side wall of the positioning block (111) is elastically connected to the side wall of the positioning plate (112) through a positioning spring (113).

2. A continuous flow sand filter according to claim 1, characterized in that: The cleaning assembly (12) includes a connecting frame (121), the side wall of the connecting frame (121) is fixedly connected to the side wall of the branch pipe (7), a moving rod (122) is slidably connected inside the connecting frame (121), the end of the moving rod (122) is elastically connected to the side wall of the connecting frame (121) through a return spring (123), and the other end of the moving rod (122) is fixedly connected to a cleaning plate (124).

3. A continuous flow sand filter according to claim 1, characterized in that: The water distributor (6) has multiple T-shaped grooves inside, and the multiple T-shaped grooves are of equal size and are arranged in a ring array inside the water distributor (6).

4. A continuous flow sand filter according to claim 3, characterized in that: The connecting block (10) is T-shaped and is inserted into the inside of the T-shaped groove.

5. A continuous flow sand filter according to claim 1, characterized in that: The top of the connecting block (10) is provided with a fixing block, which is arc-shaped.

6. A continuous flow sand filter according to claim 5, characterized in that: The bottom of the positioning block (111) is provided with an arc-shaped fixing groove, and the fixing block is inserted into the inside of the arc-shaped fixing groove.

7. A continuous flow sand filter according to claim 2, characterized in that: The connecting frame (121) has a connecting hole inside, and the moving rod (122) passes through and is slidably connected in the connecting hole.

8. A continuous flow sand filter according to claim 2, characterized in that: The top of the cleaning plate (124) is provided with a cleaning pad, and the top of the cleaning pad is fixedly connected to the bottom of the branch pipe (7).

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