Drum-type bar screen

Abstract

The application provides a drum-type grid cleaner and relates to the technical field of grid machines, which comprises a base provided with a water passage recess; a sleeve coaxially arranged and an outer pipe arranged in the water passage recess of the base. The cooperation of the slag scraping plate provided with the inclined grooves and the elastic poking brush achieves effective capture of fiber slag and self-cleaning vibration of the poking brush. In combination with the variable-pitch auger and the low-friction bearing plate, the effect of efficient conveying and compression of slag and significant reduction of equipment blockage and adhesion is achieved.

Description

Technical Field

[0001] This utility model relates to the field of bar screen technology, and more specifically, to a rotary drum bar screen cleaning machine. Background Technology

[0002] Rotary drum bar screens are commonly used solid-liquid separation devices in wastewater treatment. Their core function is to intercept suspended solids in wastewater and achieve solid-water separation through a rotating screen. A typical structure consists of an inclined cylindrical rotating drum screen, a central drive shaft, a scraper, and a matching screw conveyor. During operation, the drum rotates continuously, using the gaps in the screen to trap impurities, while the scraper removes the trapped screen residue to the conveying device.

[0003] In wastewater treatment scenarios containing flexible impurities such as hair and synthetic fibers, existing rotary drum bar screens have significant technical defects: the gap design between the scraper and the drum screen does not take into account the deformation characteristics of flexible materials, causing short fiber impurities to become entangled and accumulated during the scraping process; the nozzle layout and flushing angle of the backwashing system fail to generate effective shearing force, making it impossible to completely disperse the dense entangled layer adhering to the back of the scraper; and the equipment control logic lacks specific optimization for flexible impurities, causing the backwashing system to stop simultaneously when the drum stops rotating, resulting in secondary adhesion of impurities under static conditions.

[0004] Therefore, we made improvements and proposed a rotary drum bar screen cleaner. Utility Model Content

[0005] In order to achieve the above-mentioned objectives, this utility model provides a rotary drum bar screen cleaner to improve the above-mentioned problems.

[0006] The application is as follows:

[0007] include:

[0008] The base has a drainage recess;

[0009] The sleeve and outer tube are coaxially arranged and are located in the water-passing recess of the base. The outer tube has a through groove away from the gravity side, an opening plate on the water passage path, and a slag trough on the gravity side.

[0010] The auger is threaded through the sleeve and outer tube to the opening plate and is rotatably mounted thereto;

[0011] A support plate is set in the inner wall of the outer tube and covers the lifting path where the auger and the through groove overlap.

[0012] The slag scraper is fixedly installed with the auger and configured to move the slag in the slag trough. When it coincides with the bearing surface of the bearing plate, it is inclined at an angle that makes it easy for the slag to fall off.

[0013] An inclined groove is formed on the scraping surface of the scraper plate, extending from wide to deep in the direction in which the slag is captured by the scraper plate;

[0014] The brush, which is elastically mounted on the outer tube, has the following features:

[0015] The slag removal plate is located on the path of the inclined groove;

[0016] The force-bearing plate is fixed on the actuating brush and is configured to first contact the inclined groove when rotating;

[0017] When the force plate separates from the scraper plate, the scraper plate reciprocates in the direction of elasticity.

[0018] Preferably, the elastic direction of the agitator brush is parallel to the axis of the outer tube.

[0019] Preferably, a spring telescopic rod is provided between the agitator brush and the outer tube, a buffer rubber layer is provided on the impact surface of the force plate, and the width of the force plate is less than the minimum groove width of the inclined groove.

[0020] Preferably, the surface of the bearing plate is coated with Teflon, and the side of it near the auger has a tapered wedge structure, with the wedge-shaped slope and the gap between the auger blades forming an extrusion channel.

[0021] Preferably, the spiral blades of the auger have a variable pitch configuration near the opening plate section, with the pitch decreasing from the sleeve towards the opening plate, and wear-resistant ceramic plates embedded on the outer edge of the blades.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] In the scheme of this application:

[0024] To address the problems in the prior art, this application achieves effective capture of fibrous slag and self-cleaning vibration of the brush by using a scraper with an inclined groove in conjunction with an elastic agitator. Combined with a variable pitch auger and a low-friction bearing plate, this achieves efficient conveying and compression of slag while significantly reducing equipment blockage and adhesion. Attached Figure Description

[0025] Figure 1 This is a front view of the rotary drum bar screen provided in this application;

[0026] Figure 2 A cross-sectional view of the rotary drum bar screen provided in this application;

[0027] Figure 3 This is an enlarged view of section A of the rotary drum bar screen provided in this application.

[0028] The image shows:

[0029] 1. Base; 2. Sleeve; 3. Outer pipe; 31. Slag trough; 4. Screw auger; 41. Bearing plate; 5. Slag scraper; 51. Inclined trough; 6. Moving brush; 61. Slag scraper; 62. Load-bearing plate. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0031] For an example, please refer to... Figure 1 , Figure 2 and Figure 3 Rotary drum bar screen cleaner, including:

[0032] Base 1 has a water-permeable recess;

[0033] The sleeve 2 and the outer tube 3 are coaxially arranged and are located in the water passage recess of the base 1. The outer tube 3 has a through groove away from the gravity side, an opening plate on the water passage path, and a slag trough 31 on the gravity side.

[0034] Screw 4 is threaded through sleeve 2 and outer pipe 3 to the opening plate and is rotatably installed therewith;

[0035] The bearing plate 41 is set in the inner wall of the outer tube 3 and covers the lifting path where the auger 4 overlaps with the through groove;

[0036] The slag scraper 5 is fixedly installed with the screw conveyor 4 and is configured to move the slag in the slag trough 31. When it coincides with the bearing surface of the bearing plate 41, it is inclined at an angle that makes it easy for the slag to fall off.

[0037] An inclined groove 51 is formed on the scraping surface of the scraper plate 5, and extends from wide to deep in the direction in which the slag is captured by the scraper plate 5.

[0038] The actuating brush 6 is elastically mounted on the outer tube 3 and has the following features:

[0039] The slag removal plate 61 is located on the path of the inclined groove 51;

[0040] The force plate 62 is fixed on the toggle brush 6 and is configured to contact the inclined groove 51 first when rotating.

[0041] When the force plate 62 separates from the scraper plate 5, the scraper plate 5 reciprocates in the direction of elasticity.

[0042] When this rotary drum bar screen is in operation, water carrying impurities enters the equipment through the open plate on the outer pipe 3. During rotation, the auger 4 gradually conveys the sludge in the sewage to the sludge trough 31 on the gravity side. It should be noted that this equipment has an independent drive unit and drive source to drive the auger 4 to rotate. When the sludge is lifted to the passage area by the rotation of the auger 4, the support plate 41 provides a stable transition platform for the sludge, preventing it from falling back during transport. The scraper 5, fixed to the auger 4, rotates accordingly. Its inclined angle design ensures that when the scraper 5 passes over the surface of the support plate 41, some of the sludge slides down into the support plate 41 due to the change in the center of gravity.

[0043] During the process of the scraper 5 moving the slag accumulated in the slag trough 31, the structure of the inclined groove 51 opened on its scraper surface, which has a self-capturing direction from wide to deep, can more stably support and accommodate the scraped fibrous or lumpy slag, preventing it from slipping off during the scraping process.

[0044] The agitator brush 6, elastically mounted on the outer tube 3, is driven by the force-bearing plate 62. When the scraper plate 5 rotates to a position close to the agitator brush 6, its inclined groove 51 first contacts the force-bearing plate 62 of the agitator brush 6. The inclined surface of the inclined groove 51 guides the force-bearing plate 62 to move along a predetermined path, causing the agitator brush 6 to be elastically squeezed. As the scraper plate 5 continues to rotate, the agitator brush 61 then enters the path of the inclined groove 51 to perform secondary cleaning of any residue that may remain in the groove.

[0045] The moment the force plate 62 completely separates from the inclined groove 51, the energy stored in the elastic element of the agitator brush 6 is released, causing the agitator brush 6 to reciprocate in the direction of elasticity. This vibration, on the one hand, thoroughly removes any fine debris that may adhere to the inclined groove 51 through the slag-removing plate 61, and on the other hand, shakes off any impurities that the agitator brush 6 itself may carry, maintaining a consistent cleaning effect.

[0046] Throughout the entire process, the inclined trough 51 not only serves as a temporary support structure for the slag, improving the carrying capacity of the scraper 5, but also provides precise force conditions for the agitator brush 6 through its special contour shape, guiding the agitator brush 6 to complete an orderly rebound motion. This synergistic effect between components ultimately achieves continuous and efficient cleaning of slag in the slag trough 31 area, reducing the possibility of equipment blockage, while reducing the need for manual maintenance through a mechanical self-cleaning mechanism.

[0047] The elastic direction of the brush 6 is parallel to the axis of the outer tube 3;

[0048] This ensures that the vibration direction of the brush 6 is consistent with the conveying path of the slag, which can more effectively shake the cleaned slag to the predetermined collection area and avoid slag splashing or residue that may be caused by lateral vibration.

[0049] A spring telescopic rod is provided between the brush 6 and the outer tube 3. The impact surface of the force plate 62 is provided with a buffer rubber layer. The width of the force plate 62 is less than the minimum groove width of the inclined groove 51.

[0050] The spring telescopic rod provides a stable and controllable elastic restoring force, the buffer rubber layer reduces impact noise and protects the parts, and the design of the force plate 62 being narrower than the width of the inclined groove 51 ensures that it can enter the interior of the inclined groove 51 without interference, thereby achieving effective scraping of residual slag in the groove.

[0051] The surface of the bearing plate 41 is coated with Teflon, and the side of it near the auger 4 has a tapered wedge structure, with the wedge-shaped slope and the gap between the auger 4 blades forming an extrusion channel.

[0052] The Teflon coating greatly reduces the adhesion between the slag and the surface of the bearing plate 41, making it easier to slide off; the tapered wedge structure can cooperate with the auger blades 4 to squeeze and dehydrate the slag transported there, reducing its volume and stickiness, and facilitating subsequent cleaning.

[0053] The spiral blades of the auger 4 have a variable pitch configuration near the opening plate section, with the pitch decreasing from the sleeve 2 toward the opening plate, and wear-resistant ceramic plates embedded on the outer edge of the blades.

[0054] The decreasing pitch design increases the compression density of the slag at the discharge end, thereby squeezing out more moisture and forming a more stable slag cake, which is easier for the scraper plate 5 to scrape off, and the ceramic plates increase the service life of the equipment.

[0055] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A rotary drum bar screen cleaner, characterized in that, include: The base has a drainage recess; The sleeve and outer tube are coaxially arranged and are located in the water-passing recess of the base. The outer tube has a through groove away from the gravity side, an opening plate on the water passage path, and a slag trough on the gravity side. The auger is threaded through the sleeve and outer tube to the opening plate and is rotatably mounted thereto; A support plate is set in the inner wall of the outer tube and covers the lifting path where the auger and the through groove overlap. The slag scraper is fixedly installed with the auger and configured to move the slag in the slag trough. When it coincides with the bearing surface of the bearing plate, it is inclined at an angle that makes it easy for the slag to fall off. An inclined groove is formed on the scraping surface of the scraper plate, extending from wide to deep in the direction in which the slag is captured by the scraper plate; The brush, which is elastically mounted on the outer tube, has the following features: The slag removal plate is located on the path of the inclined groove; The force-bearing plate is fixed on the actuating brush and is configured to first contact the inclined groove when rotating; When the force plate separates from the scraper plate, the scraper plate reciprocates in the direction of elasticity.

2. The rotary drum bar screen cleaner according to claim 1, characterized in that, The elastic direction of the agitator brush is parallel to the axis of the outer tube.

3. The rotary drum bar screen cleaner according to claim 2, characterized in that, A spring telescopic rod is provided between the agitator brush and the outer tube, and a buffer rubber layer is provided on the impact surface of the force plate. The width of the force plate is less than the minimum groove width of the inclined groove.

4. The rotary drum bar screen cleaner according to claim 3, characterized in that, The surface of the bearing plate is coated with Teflon, and the side of it near the auger has a tapered wedge structure, with the wedge-shaped slope and the gap between the auger blades forming an extrusion channel.

5. The rotary drum bar screen cleaner according to claim 4, characterized in that, The screw conveyor's spiral blades have a variable pitch configuration near the opening plate section, with the pitch decreasing from the sleeve towards the opening plate, and wear-resistant ceramic plates embedded on the outer edge of the blades.

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