Sand water separator

Abstract

The utility model discloses a sand water separator, including the water tank, the water tank bottom is fixed with the inclined conveying pipe, the conveying pipe inside is provided with spiral blade, the water tank side wall top is fixed with the water inlet pipe, and the water tank is away from the water inlet pipe one side and is fixed with the water outlet pipe, the water tank inside is close to the water outlet pipe place and is fixed with the L shape overflow board, the water tank is inside and is located the overflow board below and is fixed with the first baffle, in the utility model, set up the water tank, conveying pipe, spiral blade, bottom cover subassembly, axle rod, end cap, speed reducer motor and belt, conveying pipe top and bottom are all open design, and spiral blade, axle rod and end cap are as the whole structure and can be directly drawn out from conveying pipe top, thereby facilitating the replacement of the seriously worn spiral blade, making the spiral blade of this separator more convenient and fast replacement and maintenance, secondly, bottom cover subassembly can rotate and open at conveying pipe bottom, thereby facilitating the cleaning of the sand that cannot be discharged from conveying pipe bottom.

Description

Technical Field

[0001] This utility model relates to the field of sand-water separation technology, and in particular to a sand-water separator. Background Technology

[0002] Sand separators are key pretreatment equipment in wastewater treatment systems, primarily used to remove inorganic particles such as sand from wastewater. They are typically installed after a grit chamber, separating sand from organic matter through gravity settling, cyclone separation, or mechanical screening. Their core purpose is to protect downstream pumps, pipelines, and treatment facilities from wear and blockage, reduce equipment maintenance costs, and ensure stable operation of the treatment system. Common types include cyclone separators and shaftless spiral separators, widely used in municipal wastewater treatment and industrial wastewater treatment.

[0003] A search revealed that patent CN222956002U discloses a sand-water separator that uses a spiral conveyor to discharge solid particles upwards, allowing for continuous operation. Its design features an upper section higher than the separation tank, ensuring that water is not discharged along with the solid particles. Furthermore, a filter screen is installed below the inlet pipe, extending directly to the bottom of the outer casing, effectively preventing solid particles from falling into other areas and accumulating due to water flow fluctuations.

[0004] However, the aforementioned separator has the following drawbacks: First, all wastewater containing solid particles must first pass through a filter screen. Although the screen can prevent the diffusion of large particles, fibers, hair, fine sand, and sticky substances easily adhere to and clog the screen. Despite the presence of an observation window, once a blockage is detected, the machine must be stopped for cleaning. Second, like other separators on the market, this separator has a motor installed at the top of the bottom pipe that conveys sand. When the shaftless spiral blades are severely worn and need replacement, they cannot be directly pulled out from the top of the conveying pipe. The disassembly process is cumbersome and inconvenient for later maintenance. Third, existing separators have dead corners at the bottom of the conveying pipe. The shaftless spiral blades cannot discharge sand from these corners, causing sand to accumulate. Since the bottom of the conveying pipe is a closed design, it is difficult to clean this accumulated sand. Therefore, further improvements are needed. To this end, we propose a sand-water separator. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a sand-water separator.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a sand-water separator, comprising a water tank, an inclined conveying pipe fixed at the bottom of the water tank, a spiral blade inside the conveying pipe, an inlet pipe fixed at the top of the side wall of the water tank, and an outlet pipe fixed on the side of the water tank away from the inlet pipe, an L-shaped overflow plate fixed inside the water tank near the outlet pipe, a first baffle fixed inside the water tank below the overflow plate, and a second baffle fixed inside the water tank near the inlet pipe. The bottom and top of the conveying pipe are both open, and a bottom cover assembly is provided at the bottom of the conveying pipe. A sand discharge port is opened on the lower surface of the top of the conveying pipe. An end cover is fixed to the top surface of the conveying pipe by bolts, and a shaft is rotatably connected to the middle of the end cover by a bearing. The shaft is fixedly connected to the spiral blade, and a reduction motor for driving the shaft to rotate is installed on the top surface of the conveying pipe.

[0007] Furthermore, the height of the inlet pipe is greater than the height of the outlet pipe.

[0008] Furthermore, the first baffle is inclined and has a bent top, while the second baffle has a bent bottom.

[0009] Furthermore, the bottom cover assembly includes a bottom cover plate that is rotatably connected to the delivery pipe via a hinge.

[0010] Furthermore, the bottom cover assembly also includes a cylinder fixed to the outer wall of the conveying pipe. A spring is fixed to the bottom wall of the cylinder, and a sliding rod is fixedly connected to the top of the spring. The sliding rod is slidably connected to the cylinder, and an L-shaped plate is fixedly connected to the top of the sliding rod. The side of the L-shaped plate away from the sliding rod is engaged with the surface of the bottom cover plate, and a compression bolt is threadedly connected to the side of the L-shaped plate near the bottom cover plate.

[0011] Furthermore, pulleys are fixed to both the end of the shaft outside the end cover and the output end of the geared motor, and a belt is fitted onto the surface of both pulleys.

[0012] The beneficial effects of this utility model are:

[0013] 1. In use, this utility model includes a water tank, a conveying pipe, a spiral blade, a bottom cover assembly, a shaft, an end cover, a reduction motor, and a belt. The top and bottom of the conveying pipe are open. The spiral blade, shaft, and end cover are an integral structure that can be directly pulled out from the top of the conveying pipe, making it easy to replace the severely worn spiral blade and making the replacement and maintenance of the separator's spiral blade more convenient and quick. Secondly, the bottom cover assembly can be rotated open at the bottom of the conveying pipe, making it easy to clean out the sand that cannot be discharged from the bottom of the conveying pipe.

[0014] 2. When in use, this utility model is equipped with a water tank, a conveying pipe, a spiral blade, an inlet pipe, an outlet pipe, an overflow plate, a first baffle, and a second baffle. After the first baffle and the second baffle are set, the sewage will not flow directly to the overflow plate after entering from the inlet pipe. Furthermore, the water flow impact is reduced by the obstruction of the first baffle and the second baffle, preventing sand and gravel from overflowing directly from the overflow plate. Compared with filter screens, this is more convenient, will not clog, and does not require subsequent maintenance and cleaning. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an overall sectional view of the present invention;

[0017] Figure 2 This is a partial perspective sectional view of the present invention;

[0018] Figure 3 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0019] Figure 4 For the present utility model Figure 1 Enlarged view of section B in the middle.

[0020] The attached figures are labeled as follows:

[0021] 1. Water tank; 2. Delivery pipe; 3. Spiral blade; 4. Inlet pipe; 5. Outlet pipe; 6. Overflow plate; 7. First baffle; 8. Second baffle; 9. Bottom cover assembly; 91. Bottom cover plate; 92. Cylinder; 93. Spring; 94. Slide rod; 95. L-shaped plate; 96. Extrusion bolt; 10. Shaft; 11. End cover; 12. Gear motor; 13. Pulley; 14. Belt; 15. Sand discharge port. Detailed Implementation

[0022] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-4As shown, a sand-water separator is disclosed, comprising a water tank 1, an inclined conveying pipe 2 fixed to the bottom of the water tank 1, a spiral blade 3 installed inside the conveying pipe 2, an inlet pipe 4 fixed to the top of the side wall of the water tank 1, and an outlet pipe 5 fixed to the side of the water tank 1 away from the inlet pipe 4. An L-shaped overflow plate 6 is fixed inside the water tank 1 near the outlet pipe 5. A first baffle 7 is fixed inside the water tank 1 and below the overflow plate 6. A second baffle 8 is fixed inside the water tank 1 and near the inlet pipe 4. The bottom and top of the conveying pipe 2 are open, and a bottom cover assembly 9 is provided at the bottom of the conveying pipe 2. A sand discharge port 15 is opened on the lower surface of the top of the conveying pipe 2. An end cover 11 is fixed to the top surface of the conveying pipe 2 by bolts, and a shaft 10 is rotatably connected to the middle of the end cover 11 by a bearing. The shaft 10 is fixedly connected to the spiral blade 3. A reduction motor 12 for driving the shaft 10 to rotate is installed on the top surface of the conveying pipe 2.

[0024] The height of the inlet pipe 4 is greater than the height of the outlet pipe 5. After the sewage enters the water tank 1 through the inlet pipe 4, the clean water will be discharged through the outlet pipe 5. Since the height of the inlet pipe 4 is higher than that of the outlet pipe 5, the water will not flow back into the inlet pipe 4.

[0025] The first baffle 7 is inclined and has a bent top, while the second baffle 8 has a bent bottom.

[0026] The inclined portion of the first baffle 7 is parallel to the inclined portion of the second baffle 8. When the sewage enters the water tank 1 from the inlet pipe 4, it is first blocked by the second baffle 8. The sand in the sewage will not be discharged directly to the outlet pipe 5. After being blocked by the second baffle 8, it is blocked by the first baffle 7 again, causing the sand in the sewage to settle downward into the conveying pipe 2. The water with the sand removed overflows through the overflow plate 6 and is discharged from the outlet pipe 5.

[0027] The bottom cover assembly 9 includes a bottom cover plate 91 that is rotatably connected to the conveying pipe 2 via a hinge. Therefore, the bottom cover plate 91 can rotate around the hinge, so that the bottom of the conveying pipe 2 is completely open, making it easy to clean out sand that cannot be discharged.

[0028] The bottom cover assembly 9 also includes a cylinder 92 fixed to the outer wall of the conveying pipe 2. A spring 93 is fixed to the bottom wall of the inner wall of the cylinder 92. A slide rod 94 is fixedly connected to the top of the spring 93. The slide rod 94 is slidably connected to the cylinder 92. An L-shaped plate 95 is fixedly connected to the top of the slide rod 94. The side of the L-shaped plate 95 away from the slide rod 94 is snapped onto the surface of the bottom cover plate 91. The side of the L-shaped plate 95 near the bottom cover plate 91 is penetrated and connected to a compression bolt 96 by a threaded rotation.

[0029] When it is necessary to open the bottom cover plate 91, first loosen the clamping bolt 96 to stop clamping the bottom cover plate 91. Then pull the L-shaped plate 95 upward to separate it from the bottom cover plate 91. Then you can rotate it downward to open the bottom cover plate 91. After cleaning the sand, rotate the bottom cover plate 91 upward to close it again. Loosen the L-shaped plate 95 so that the spring 93 pulls the slide rod 94 and the L-shaped plate 95 to reset. The L-shaped plate 95 is then stuck back on the surface of the bottom cover plate 91. Finally, tighten the clamping bolt 96 to clamp and fix the bottom cover plate 91.

[0030] The shaft 10 is fixed with pulleys 13 at one end outside the end cover 11 and at the output end of the geared motor 12. The two pulleys 13 are fitted with belts 14.

[0031] When the separator is working, the geared motor 12 drives the shaft 10 to rotate via the belt 14, which in turn drives the spiral blade 3 to rotate. The spiral blade 3 transports the sand at the bottom of the conveying pipe 2 upwards and finally discharges it from the sand discharge port 15. When replacing or maintaining the spiral blade 3, first remove the belt 14, then remove the end cover 11, and finally pull the end cover 11, along with the shaft 10 and the spiral blade 3, out of the top of the conveying pipe 2.

[0032] Working principle: When the sand separator is working, wastewater enters the water tank 1 through the inlet pipe 4. It is then blocked and guided by the second baffle 8 and the first baffle 7, slowing the water flow and changing its direction. This allows the sand particles to settle and fall to the bottom of the conveying pipe 2. The reduction motor 12 drives the shaft 10 to rotate via the pulley 13 and belt 14, which in turn drives the spiral blade 3 to transport the deposited sand particles upwards, finally discharging them from the sand discharge port 15. The separated clean water overflows through the overflow plate 6 and flows out through the outlet pipe 5. When cleaning and maintenance are required, the bottom cover plate 91 of the bottom cover assembly 9 can be opened to discharge the accumulated sand.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A sand-water separator, comprising a water tank (1), wherein an inclined conveying pipe (2) is fixed to the bottom of the water tank (1), a spiral blade (3) is provided inside the conveying pipe (2), an inlet pipe (4) is fixed to the top of the side wall of the water tank (1), and an outlet pipe (5) is fixed to the side of the water tank (1) away from the inlet pipe (4), and an L-shaped overflow plate (6) is fixed inside the water tank (1) near the outlet pipe (5), characterized in that: A first baffle (7) is fixed inside the water tank (1) and below the overflow plate (6). A second baffle (8) is fixed inside the water tank (1) and near the inlet pipe (4). The bottom and top of the conveying pipe (2) are open. A bottom cover assembly (9) is provided at the bottom of the conveying pipe (2). A sand discharge port (15) is opened on the lower surface of the top of the conveying pipe (2). An end cover (11) is fixed to the top surface of the conveying pipe (2) by bolts. A shaft (10) is rotatably connected to the middle of the end cover (11) by a bearing. The shaft (10) is fixedly connected to the spiral blade (3). A geared motor (12) for driving the shaft (10) to rotate is installed on the top surface of the conveying pipe (2).

2. A sand-water separator according to claim 1, characterized in that: The height of the inlet pipe (4) is greater than the height of the outlet pipe (5).

3. A sand-water separator according to claim 1, characterized in that: The first baffle (7) is inclined and has a bent top, while the second baffle (8) has a bent bottom.

4. A sand-water separator according to claim 1, characterized in that: The bottom cover assembly (9) includes a bottom cover plate (91) that is rotatably connected to the delivery pipe (2) via a hinge.

5. A sand-water separator according to claim 4, characterized in that: The bottom cover assembly (9) also includes a cylinder (92) fixed to the outer wall of the conveying pipe (2). A spring (93) is fixed to the bottom wall of the inner wall of the cylinder (92). A slide rod (94) is fixedly connected to the top of the spring (93). The slide rod (94) is slidably connected to the cylinder (92). An L-shaped plate (95) is fixedly connected to the top of the slide rod (94). The side of the L-shaped plate (95) away from the slide rod (94) is engaged with the surface of the bottom cover plate (91). The side of the L-shaped plate (95) near the bottom cover plate (91) is connected to a compression bolt (96) through a threaded rotation.

6. A sand-water separator according to claim 1, characterized in that: The shaft (10) is fixed with pulleys (13) at one end outside the end cover (11) and at the output end of the geared motor (12), and a belt (14) is sleeved on the surface of the two pulleys (13).

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