A screw rotary decanter

Abstract

The utility model relates to sewage treatment equipment technical field, specifically disclose a screw rotation type decanter, including support seat, ponding pipe, drain pipe, rotating machine base and water collecting tank, and the water collecting tank is connected with ponding pipe through the connecting pipe, and motor drive inner thread sleeve and screw rod cooperation realizes the lifting adjustment of water collecting tank. The water collecting tank both sides are equipped with the sliding slot, and the sliding slot is slidably installed with the slag baffle, and the slag baffle both ends are equipped with the buoy, can automatically move up with water level and block the float, guarantees the drainage water quality. The water collecting tank is equipped with the filter plate at the connecting pipe interface, and the filter plate can filter the incoming water flow, and the water collecting tank is internally equipped with the impeller shaft, and the impeller shaft is linked through the swing link and the sliding bar, drives the scraper rod to carry out periodic cleaning to the filter plate surface, and spring is used for pushing the sliding bar reset, guarantees the continuous reliable cleaning action.

Description

Technical Field

[0001] This utility model belongs to the field of decanter technology, specifically relating to a screw-rotating decanter. Background Technology

[0002] In wastewater treatment processes, decanters are key unit equipment, primarily used to remove supernatant from sedimentation tanks or intermittent reaction tanks. Existing decanters mostly employ float-type or riser-type structures, achieving drainage through level difference or mechanical lifting. However, traditional structures have some shortcomings. For example, float-type decanters rely on buoyancy to adjust the outlet position; when there is a large amount of floating debris on the water surface, this debris can easily enter the collection tank with the water, leading to a decline in effluent quality. Riser-type decanters typically adjust the height through a simple lifting mechanism, but lack effective sludge-blocking measures during adjustment, making it impossible to prevent floating impurities from entering with the water.

[0003] Furthermore, existing decanters generally lack automatic cleaning measures for the filtration process. Filter plates or screens are easily clogged by impurities during long-term operation, resulting in a decrease in water flow and even affecting normal operation. Although some devices have introduced simple scraper cleaning structures, under the continuous action of water flow, the scrapers often have problems such as untimely resetting and insufficient cleaning range, making it difficult to ensure that the filter plates remain unobstructed for a long time. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a screw rotary decanter, which can achieve precise adjustment through screw rotation, and can automatically block slag according to water level changes during drainage. It also has a filter plate self-cleaning function, so as to improve the quality of drainage water and the reliability of equipment operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A screw-type decanter includes a support base and a rotating base. The support bases are symmetrically installed on the bottom of the pool. A water collection pipe is rotatably installed between two support bases. Connecting pipes are evenly arranged on the surface of the water collection pipe. A water collection trough is provided at one end of the multiple connecting pipes away from the water collection pipe.

[0007] One end of the connecting pipe at the back of the water collection tank is open, and sliding grooves are provided on both sides of the water collection tank. A slag-blocking plate is slidably installed between the two sliding grooves.

[0008] A filter plate is installed at the connection between the water collection tank and the connecting pipe. Scrapers are evenly rotated and installed on the upper part of the inner wall of the water collection tank. Multiple scrapers are placed above multiple filter plates respectively. The scrapers are used to clean the surface of the filter plates.

[0009] Furthermore, the slag baffle is used to block floating debris, and both ends of the two slag baffles are provided with floats, which are placed on both sides of the outside of the water collection tank.

[0010] Furthermore, the rotating shaft surface of the filter plate is provided with an incomplete gear, and a slide rod is horizontally slidably installed above the inner wall of the water collection tank. The lower surface of the slide rod is provided with protruding teeth that mesh with the incomplete gear.

[0011] Furthermore, the slide rod extends through the side surface of the water collection tank, and the lower surface of one end of the slide rod has a first extrusion arc surface;

[0012] A fixed cylinder is installed at the end of the water collection tank away from the first extrusion arc surface. The end of the slide rod slides inside the fixed cylinder. A spring is placed inside the fixed cylinder, and the spring applies an outward thrust to the slide rod.

[0013] Furthermore, an impeller shaft rotates inside the water collection tank, with one end of the impeller shaft penetrating the side surface of the water collection tank, and a swing rod is provided at the end of the impeller shaft, with the swing rod positioned outside the water collection tank;

[0014] The inner side of the end of the swing rod is provided with a second extrusion arc surface that corresponds to the first extrusion arc surface.

[0015] Furthermore, a drain pipe is installed on the central surface of the water collection pipe, and a connecting plate is horizontally fixed between the multiple connecting pipes. A threaded rod is hinged to the center of the upper surface of the connecting plate.

[0016] Furthermore, the rotating base rotates above the pool wall, a motor is installed inside the rotating base, an internally threaded sleeve is installed at the output end of the motor, and the end of the threaded rod is screwed into the inside of the internally threaded sleeve.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] By using a motor to drive the internal threaded sleeve and threaded rod, precise adjustment of the water collection tank's height can be achieved. During the sedimentation stage, the tank can rise above the liquid surface for standby, and then descend to the set position to complete drainage during the decanting stage. This structure solves the problem of inflexible height adjustment in traditional decanters, making the drainage process more controllable and stable.

[0019] By installing baffle plates on both sides of the water collection tank and attaching floats at both ends of the baffle plates, the baffle plates can automatically rise with the liquid level under buoyancy and always remain at the water surface. This structure effectively prevents floating debris from entering the water collection tank and avoids it from entering the drainage pipe, thus solving the problem of declining water quality in traditional decanters during operation.

[0020] By installing a filter plate at the interface between the water collection tank and the connecting pipe, the water flow is filtered before entering the collection pipe, effectively trapping suspended impurities in the water. Driven by the water flow, the impeller shaft inside the water collection tank rotates, driving a swing rod. The squeezing arc surface on the swing rod interacts with the squeezing arc surface on the slide rod, causing the slide rod to move laterally. Through the meshing of the convex teeth and the incomplete gear, the slide rod drives the scraper to scrape and clean the surface of the filter plate. This linkage structure ensures that the filter plate remains clean during operation, effectively preventing clogging due to prolonged use and solving the problem of poor water flow caused by the lack of effective self-cleaning measures in existing decanters.

[0021] By incorporating a spring at the end of the slide bar, the slide bar automatically resets under the spring's action after completing the scraping action, ensuring that the scraper bar is in its initial position before the next cleaning cycle. This design improves the continuity and reliability of filter plate cleaning, avoids the problem of insufficient cleaning range caused by untimely scraper bar reset, and thus ensures long-term stable operation of the entire decanting process. Attached Figure Description

[0022] Figure 1 This is a front view structural diagram of the present utility model;

[0023] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the water collection tank of this utility model;

[0025] Figure 4 This is a schematic diagram of the slag-blocking plate structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the cross-sectional structure of the water collection tank of this utility model;

[0027] Figure 6 This is a schematic diagram of the end structure of the swing rod and slide rod of this utility model;

[0028] Figure 7 This is a schematic diagram of the transverse top section of the slide bar installation structure of this utility model.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Support base; 2. Water collection pipe; 21. Connecting pipe; 22. Connecting plate; 3. Drainage pipe; 4. Rotating base; 41. Internal threaded sleeve; 42. Threaded rod; 5. Water collection trough; 51. Slide groove; 52. Fixed cylinder; 6. Filter plate; 61. Scraper rod; 62. Incomplete gear; 7. Slag baffle plate; 71. Float; 8. Slide rod; 81. First extrusion arc surface; 9. Spring; 10. Impeller shaft; 101. Swing rod; 102. Second extrusion arc surface. Detailed Implementation

[0031] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0032] Example 1:

[0033] like Figures 1-7 As shown, a screw rotary decanter includes a support base 1 and a rotating base 4. The support base 1 is symmetrically installed on the bottom of the pool. A water collection pipe 2 is rotatably installed between the two support bases 1. Connecting pipes 21 are evenly arranged on the surface of the water collection pipe 2. A water collection trough 5 is provided at one end of the multiple connecting pipes 21 away from the water collection pipe 2.

[0034] The inside of the water collection pipe 2 is connected to the drain pipe 3, which is used to transport the clean water collected through the water collection tank 5 out of the pool.

[0035] Multiple connecting pipes 21 are symmetrically distributed and can drive the water collection tank 5 to be adjusted up and down through the extension and retraction of the threaded rod 42. This ensures that the water collection tank 5 can be moved up to the liquid level for standby during the sedimentation process, and gradually descend to the set depth during the decanting stage to complete the discharge of the supernatant.

[0036] One end of the back connecting pipe 21 of the water collection tank 5 is open to ensure that water flows smoothly into the interior;

[0037] Both sides of the water collection tank 5 are provided with sliding grooves 51, and a slag baffle 7 is slidably installed between the two sliding grooves 51. Under the buoyancy of the float 71, the slag baffle 7 can be kept at the liquid surface position with the water level, which can effectively prevent floating debris from entering the water collection tank 5 and solve the problem of the lack of effective slag baffle measures in the existing decanter, which leads to the decline of the effluent water quality.

[0038] like Figures 2-4 As shown, the slag baffle 7 is used to block floating debris. Both ends of the two slag baffles 7 are equipped with floats 71, which are placed on both sides of the outside of the water collection tank 5.

[0039] The float 71 has a hollow structure and is filled with air or lightweight materials to ensure that it can generate stable buoyancy on the liquid surface, thereby pushing the slag baffle 7 to move upward along the slide 51.

[0040] The upward movement of the baffle plate 7 ensures that the inlet of the water collection tank 5 is always in a water layer free of debris, preventing floating objects from entering the water collection tank 5 and improving the cleanliness of the drainage.

[0041] With the real-time floating response of the float 71, the entire slag-blocking system does not rely on manual control and has the characteristics of automation, which can solve the problem of floating objects entering with the water during the drainage process of traditional riser-type decanters.

[0042] like Figure 3 As shown, the surface of the rotating shaft of the filter plate 6 is provided with an incomplete gear 62, and a slide rod 8 is horizontally slidably installed above the inner wall of the water collection tank 5. The lower surface of the slide rod 8 is provided with protruding teeth that mesh with the incomplete gear 62.

[0043] After the water flows into the water collection tank 5, it is filtered by the filter plate 6. The filter plate 6 can intercept the fine suspended particles carried in the water flow.

[0044] When the impeller shaft 10 rotates due to the impact of the water flow, it will drive the incomplete gear 62 to move intermittently, causing the scraper 61 to deflect to one side of the filter plate 6;

[0045] After the slide bar 8 meshes with the incomplete gear 62, it can periodically drive the scraper 61 to clean along the surface of the filter plate 6, effectively solving the problem of filter plate clogging and avoiding the situation where the existing decanter has poor water output due to long-term use of the filter screen.

[0046] like Figure 6 and Figure 7 As shown, the slide bar 8 penetrates the side surface of the water collection tank 5, and the lower surface of one end of the slide bar 8 has a first extrusion arc surface 81;

[0047] A fixed cylinder 52 is installed at one end of the water collection tank 5 away from the first extrusion arc surface 81. The end of the slide rod 8 slides inside the fixed cylinder 52. A spring 9 is placed inside the fixed cylinder 52. The spring 9 applies an outward pushing force to the slide rod 8.

[0048] When the slide bar 8 is deflected inward by the impact of the water flow, the spring 9 will be compressed. When there is no external force, the spring 9 can push the slide bar 8 to reset, ensuring that the scraper bar 61 is readjusted.

[0049] Through the interaction between the first extrusion arc surface 81 and the second extrusion arc surface 102, the slide bar 8 can achieve lateral reciprocating motion under the drive of the swing bar 101, so that the scraper 61 can clean the surface of the filter plate 6 evenly, thereby avoiding the problem of insufficient cleaning range.

[0050] like Figures 5-7 As shown, an impeller shaft 10 rotates inside the water collection tank 5 at the top. One end of the impeller shaft 10 passes through the side surface of the water collection tank 5, and a swing rod 101 is provided at the end of the impeller shaft 10. The swing rod 101 is placed outside the water collection tank 5.

[0051] The inner side of the end of the swing rod 101 is provided with a second extrusion arc surface 102 that corresponds to the first extrusion arc surface 81.

[0052] When the impeller shaft 10 rotates under the impact of water flow, the swing rod 101 rotates accordingly. After each rotation, the second extrusion arc surface 102 will make an extrusion contact with the first extrusion arc surface 81, thereby pushing the slide rod 8 to move laterally.

[0053] This intermittent drive allows the scraper 61 to perform a complete cleaning of the filter plate 6 surface, effectively preventing the filter plate from becoming clogged due to long-term accumulation of dirt and solving the problem of untimely cleaning of existing decanters.

[0054] like Figure 1 and Figure 2 As shown, a drain pipe 3 is installed on the center surface of the water collection pipe 2, and a connecting plate 22 is horizontally fixed between multiple connecting pipes 21. A threaded rod 42 is hinged to the center of the upper surface of the connecting plate 22.

[0055] The connecting plate 22 serves as a reinforcing structure between the connecting pipes 21, which can improve the overall stability and prevent the water collection tank 5 from shaking due to up and down movement.

[0056] The hinge between the threaded rod 42 and the connecting plate 22 ensures that it can maintain stable telescopic movement when driven by the internal threaded sleeve 41, making the vertical position adjustment of the water collection tank 5 more precise.

[0057] This structure is more reliable than the traditional float-type decanter which relies solely on buoyancy control, and can avoid the problem of the outlet shifting due to water flow impact.

[0058] like Figure 1 and Figure 2 As shown, the rotating base 4 is rotatably mounted above the pool wall. A motor is installed inside the rotating base 4. An internal threaded sleeve 41 is installed at the output end of the motor. The end of the threaded rod 42 is screwed into the inside of the internal threaded sleeve 41.

[0059] When the motor rotates, it can drive the internal threaded sleeve 41 to rotate. The internal threaded sleeve 41 is threadedly engaged with the threaded rod 42, thereby driving the threaded rod 42 to extend and retract, thereby adjusting the angle of the connecting pipe 21 and realizing the lifting and lowering control of the water collection tank 5.

[0060] With this screw-rotating structure, the lifting and lowering motion of the entire decanter is precisely controllable, solving the problem of inflexible adjustment of existing decanters;

[0061] The combination structure of the motor and the threaded pair has high stability and reliability during operation, making it suitable for long-term use in wastewater environments.

[0062] Example 2:

[0063] See Figures 1-7 The operation mode of a screw rotary decanter is as follows:

[0064] The decanter includes a support base 1, a water collection pipe 2, a drain pipe 3, a rotating base 4, a water collection tank 5, a filter plate 6, a slag baffle 7, a slide bar 8, a spring 9, an impeller shaft 10, a swing rod 101, a first extrusion arc surface 81, a second extrusion arc surface 102, a scraper 61, an incomplete gear 62, a float 71, a connecting plate 22, a threaded rod 42, and a motor-fitting internal threaded sleeve 41, among other structural components.

[0065] In the initial stage of operation, after the motor is powered on, it drives the internal threaded sleeve 41 to rotate. The internal threaded sleeve 41 is threadedly engaged with the threaded rod 42, causing the threaded rod 42 to move axially. The threaded rod 42 is hinged to the connecting plate 22, and then the connecting plate 22 drives multiple connecting pipes 21 to adjust their angles synchronously, realizing the overall lifting and lowering of the water collection tank 5. When it is necessary to keep the clear water from being discharged during the aeration and sedimentation process, the motor controls the threaded rod 42 to retract, and the connecting pipes 21 drive the water collection tank 5 to rise above the liquid level and remain in standby mode. When the sedimentation process ends and the decanting stage begins, the motor controls the threaded rod 42 to extend, and the water collection tank 5 slowly moves down into the water body.

[0066] During the downward movement of the water collection tank 5, the floats 71 installed at both ends of the baffle plate 7 gradually rise under the action of buoyancy, so that the baffle plate 7 moves upward synchronously in the sliding groove 51 and always stays at the liquid surface position; the baffle plate 7 can effectively intercept floating debris on the water surface, prevent floating objects from entering the water collection tank 5 with the water, and ensure the cleanliness of the discharged water.

[0067] When water flows into the collection tank 5, it first passes through the filter plate 6 located at the interface between the collection tank 5 and the connecting pipe 21. The filter plate 6 intercepts suspended particles in the water flow. Driven by the water flow, the impeller shaft 10 inside the collection tank 5 is rotated. When the impeller shaft 10 rotates, it drives the second extrusion arc surface 102 to periodically press the first extrusion arc surface 81 through the swing rod 101 at the end, thereby pushing the slide rod 8 to move laterally. The protruding teeth on the lower surface of the slide rod 8 mesh with the incomplete gear 62. The incomplete gear 62 rotates accordingly, driving the scraper 61 to scrape and clean along the surface of the filter plate 6. At the same time, the spring 9 applies a pushing force to the slide rod 8 inside the fixed cylinder 52, so that the slide rod 8 can automatically reset after being subjected to force, ensuring that the scraper 61 returns to its initial position after cleaning. In this way, the filter plate 6 remains unobstructed during the decanting process, avoiding the accumulation of impurities and blockage.

[0068] After the clean water is filtered through the filter plate 6, it flows into the drain pipe 3 through the water collection pipe 2, thus achieving the discharge of clean water. The entire decanting process is controlled by the precise drive of the motor and the threaded pair, and the float 71 and the slag baffle 7 achieve automatic slag blocking. The filter plate 6 is automatically cleaned by the cooperation of the impeller shaft 10, the slide bar 8, the spring 9, the scraper 61 and the incomplete gear 62. Through the above multi-structure linkage, not only is the water quality discharged from the decanter guaranteed, but the stability and reliability of the equipment are also effectively improved.

[0069] The working principle of this utility model is as follows: the internal threaded sleeve 41 is rotated by the motor, and then the angle of the connecting pipe 21 is controlled by the cooperation of the internal threaded sleeve 41 and the threaded rod 42. When the threaded rod 42 extends, the end of the connecting pipe 21 moves down, and vice versa, the end of the connecting pipe 21 moves up to adjust the height of the water collection tank 5. During aeration and sedimentation, the water collection tank 5 is moved up to the liquid level for waiting. After the bottoming is completed, the water collection tank 5 is controlled to move down. During the process of the water collection tank 5 moving down, the float 71 will gradually be buoyed. At this time, the slag baffle 7 moves up so that the slag baffle 7 is always kept at the water surface position, which can block floating debris on the water surface and prevent it from entering the water collection tank 5.

[0070] When water enters the water collection tank 5, it is discharged through the connecting pipe 21. At this time, the water flows through the filter plate 6 for filtration. Simultaneously, the water flow can drive the impeller shaft 10 to rotate. When there is no force, due to the elastic force of the spring 9 on the slide rod 8, the slide rod 8 is placed at one end of its stroke. At this time, the meshing of the bottom convex tooth and the incomplete gear 62 can drive multiple scrapers 61 to shift to one side of the filter plate 6 to prevent obstruction of the water flow. The rotation of the impeller shaft 10 can drive the swing rod 101 to rotate. With each rotation, the second extrusion arc surface 102 can press the first extrusion arc surface 81, causing the slide rod 8 to move laterally once. Then, the scraper 61 swings along one side of the surface of the filter plate 6 to clean the filter plate 6. This structure can effectively filter the passing water flow and clean the filter plate 6 at the same time, ensuring the filtration effect and preventing clogging.

[0071] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A screw rotary decanter comprising a support base (1) and a rotary housing (4), characterized in that: The support base (1) is symmetrically installed at the bottom of the pool. A water collection pipe (2) is rotatably installed between the two support bases (1). Connecting pipes (21) are evenly arranged on the surface of the water collection pipe (2). A water collection trough (5) is provided at one end of the multiple connecting pipes (21) away from the water collection pipe (2). The water collection tank (5) has an open end of the connecting pipe (21) on the back. Sliding grooves (51) are provided on both sides of the water collection tank (5). A slag baffle (7) is slidably installed between the two sliding grooves (51). A filter plate (6) is installed at the connection port between the water collection tank (5) and the connecting pipe (21). A scraper (61) is evenly rotated and installed on the upper part of the inner wall of the water collection tank (5). Multiple scrapers (61) are respectively placed above multiple filter plates (6). The scrapers (61) are used to clean the surface of the filter plates (6).

2. A screw rotary decanter according to claim 1, characterized in that: The baffle plate (7) is used to block floating debris. Both ends of the two baffle plates (7) are provided with floats (71), which are placed on both sides outside the water collection tank (5).

3. A screw rotary decanter according to claim 2, characterized in that: The rotating shaft surface of the filter plate (6) is provided with an incomplete gear (62), and a slide rod (8) is horizontally slidably installed above the inner wall of the water collection tank (5). The lower surface of the slide rod (8) is provided with convex teeth that mesh with the incomplete gear (62).

4. A screw rotary decanter according to claim 3, characterized in that: The slide rod (8) penetrates the side surface of the water collection tank (5), and the lower surface of one end of the slide rod (8) has a first extrusion arc surface (81); A fixed cylinder (52) is installed at the end of the water collection tank (5) away from the first extrusion arc surface (81). The end of the slide rod (8) slides inside the fixed cylinder (52). A spring (9) is placed inside the fixed cylinder (52). The spring (9) applies an outward thrust to the slide rod (8).

5. A screw rotary decanter according to claim 4, characterized in that: An impeller shaft (10) rotates inside the water collection tank (5) at the top. One end of the impeller shaft (10) passes through the side surface of the water collection tank (5). A swing rod (101) is provided at the end of the impeller shaft (10). The swing rod (101) is placed outside the water collection tank (5). The inner side of the end of the swing rod (101) is provided with a second extrusion arc surface (102) that corresponds to the first extrusion arc surface (81).

6. A screw rotary decanter according to claim 1, characterized in that: A drain pipe (3) is installed on the center surface of the water collection pipe (2), and a connecting plate (22) is horizontally fixed between multiple connecting pipes (21). A threaded rod (42) is hinged to the center of the upper surface of the connecting plate (22).

7. A screw rotary decanter according to claim 6, characterized in that: The rotating base (4) rotates above the pool wall. A motor is installed inside the rotating base (4). An internal threaded sleeve (41) is installed at the output end of the motor. The end of the threaded rod (42) is screwed into the inside of the internal threaded sleeve (41).

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