A uniform feed doctor blade

Abstract

The utility model discloses a kind of uniform feeding scraper, specifically related to sludge treatment field, including body, the upper end side of body is provided with feed inlet, the outer end side of body is fixedly provided with scraper deceleration motor, the output shaft of scraper deceleration motor is fixedly connected and is arranged in the mud stirring roller shaft inside body, multiple mud stirring plates are fixedly provided on the mud stirring roller shaft, the end of mud stirring plate away from mud stirring roller shaft is fixedly provided with mud stirring press plate, mud stirring rubber sheet is fixedly provided on mud stirring press plate by bolt, the front end of body is provided with discharge port, the utility model is provided with scraper deceleration motor, mud stirring roller shaft, mud stirring plate, mud stirring press plate and other structures, compact structure, high integration: the device uses modular design, can realize pry dress formula integration, especially suitable for small and medium-sized sewage treatment plant with limited space, can improve the uneven distribution problem of sludge in feeding stage, improve the processing efficiency of belt filter press.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment technology, specifically to a uniform feeding scraper. Background Technology

[0002] With the increasing volume of urban sewage discharge and the ever-increasing requirements for solid waste treatment and disposal, sludge dewatering plays an increasingly important role in cost control and sludge reuse within sewage treatment systems. To improve sludge dewatering efficiency, conventional processes typically add polymeric flocculants such as PAM before dewatering to form large flocs, which helps improve dewatering performance. However, flocculent sludge is prone to settling during transport, leading to uneven feeding into dewatering equipment and ultimately affecting the stability and efficiency of sludge treatment.

[0003] Chinese patent CN219010129U discloses a belt-type sludge thickening and dewatering integrated machine, which adopts an upper and lower filter belt structure and achieves sludge dewatering through pressing rollers and guide rollers. It is further equipped with upper and lower alignment components to automatically maintain the stability of the filter belt. An upper and lower tensioner are also provided to ensure the filter belt tension and prevent slack. An integrated rotary drum thickening mechanism and sludge conditioning tank are used to pre-treat the sludge to reduce caking.

[0004] However, this integrated machine directly pours sludge onto the filter belt through a sludge conditioning tank or unloading machine. Due to gravity, the sludge accumulation thickness may be uneven, affecting uniform distribution and causing excessive local load on the filter belt. This not only reduces dewatering efficiency but also accelerates filter belt wear, requiring frequent shutdowns for maintenance.

[0005] Chinese patent CN218025818U discloses a uniform feeding device for a sludge dewatering belt filter press. This device includes a processing tank and stirring blades, and uses a motor-driven spiral blade to push the sludge. A cam-type pressing mechanism in the device can flatten the sludge, ensuring uniform distribution on the filter belt. Furthermore, its filter plate prevents large pieces of sludge from clogging the outlet, and a barrier door and pusher plate further optimize sludge distribution.

[0006] However, the feeding device's pressing mechanism relies on the mechanical movement of cams, which may be difficult to adapt to sludge of different viscosities. In addition, the diversion effect of the barrier gate is limited, and high-concentration sludge may accumulate locally.

[0007] Chinese patent CN222293889U discloses an intelligent sludge dewatering system that automatically adjusts parameters such as the sludge feed pump and dosing pump based on feedback data from a sludge concentration meter. Its water distribution and dry powder dispensing components enable precise dosing of chemicals, optimizing the sludge dewatering effect. A moisture meter is installed at the outlet of the screw press to monitor the dewatering effect in real time and provide feedback for adjustment. The sludge-chemical mixing tank and the chemical-liquid mixing box are equipped with stirring motors to ensure uniform mixing of sludge and chemicals.

[0008] However, this intelligent system has limitations in addressing the issue of uneven initial sludge distribution on the filter belt surface. The physical uniformity of the initial sludge distribution still relies on the internal fluid dynamics process of the system. It lacks a dedicated feeding leveling and pretreatment mechanism, which can easily lead to problems such as floc aggregation or flow deviation when the moisture content is high (>95%). It still needs to rely on subsequent extrusion processes for compensation, which increases energy consumption.

[0009] Chinese patent CN114988661A discloses a wastewater treatment device for sludge dewatering. It improves the dewatering of sludge of different particle sizes through centrifugation and stratified filtration, which can alleviate clogging of the filter device to some extent. Its feed pipe can slide up and down, and the push rod squeezes the sludge to achieve uniform sludge distribution.

[0010] However, this equipment relies on the natural sedimentation of sludge within the feed pipe. Significant fluctuations in sludge concentration can lead to uneven feeding. Furthermore, the squeezing action of the push rod may not be able to completely eliminate sludge clumps, affecting the uniform distribution of subsequent filter discs. In addition, this type of device has a complex structure, large size, and long installation and commissioning cycle, making it unsuitable for skid-mounted or containerized rapid deployment. It may also struggle to handle high-moisture sludge with high initial concentration and high fluidity.

[0011] In summary, although existing sludge dewatering technologies have become diversified, they still suffer from problems such as uneven sludge feeding, uneven filter belt load, high risk of clogging, poor adaptability and versatility of existing uniform feeding facilities, complex equipment structure, and unfavorable modular skid-mounted design. Utility Model Content

[0012] The purpose of this invention is to provide a uniform feeding scraper to solve the problems mentioned in the background art.

[0013] To achieve the above objectives, this utility model provides the following technical solution:

[0014] A uniform feeding scraper includes a machine body. A feed inlet is provided on one side of the upper end of the machine body. A scraping reduction motor is fixedly installed on one side of the outer end of the machine body. The output shaft of the scraping reduction motor is fixedly connected to a mud-dispelling roller shaft installed inside the machine body. Multiple mud-dispelling plates are fixedly installed on the mud-dispelling roller shaft. A mud-dispelling pressure plate is fixedly installed at the end of the mud-dispelling plate away from the mud-dispelling roller shaft. A mud-dispelling rubber sheet is fixedly installed on the mud-dispelling pressure plate by bolts. A discharge port is provided at the front end of the machine body. A guide plate is provided at the discharge port. A flushing pipe is provided on the machine body above the guide plate.

[0015] In a preferred embodiment, both ends of the sludge-removing roller shaft are connected to the side wall of the machine body through outer spherical ball bearings. The scraper reduction motor adopts a frequency conversion control system. The setting of the outer spherical ball bearings enables the sludge-removing roller shaft to rotate better. The frequency conversion control system of the scraper reduction motor can be adjusted according to the real-time sludge flow rate, and usually maintains a ratio of 1:1 to 1:1.2 with the linear speed of the filter belt to ensure uniform sludge feeding.

[0016] In a preferred embodiment, the upper end of the feed inlet is connected to the discharge frame, and the guide plate at the discharge outlet is connected to the filter belt of the belt sludge thickener and dewatering machine. The material in the discharge frame can enter the machine body through the feed inlet, and the material at the discharge outlet falls onto the filter belt of the belt sludge thickener and dewatering machine along the guide plate.

[0017] In a preferred embodiment, the bottom end of the guide plate is rotatably mounted on the inner side wall of the machine body, and limit sliders are fixedly mounted on both sides of the upper end of the guide plate. The limit sliders are slidably mounted in the limit groove. The upper end of the guide plate is rotatably mounted to adjust the tilt angle of the guide plate, which can be used to control the thickness and uniformity of the output layer.

[0018] In a preferred embodiment, a limiting rope is provided on the limiting slider. One end of the limiting rope passes through the side wall of the machine body and is tied to the limiting post on the outside of the machine body. The limiting rope can pull the limiting slider and limit the limiting slider, which facilitates the fixing of the guide plate.

[0019] In a preferred embodiment, a water storage tank is fixedly installed on the outer side wall of the machine body, and a water pump is fixedly installed on the upper end of the water storage tank. The output end of the water pump is connected to the rinsing pipe. The water storage tank and the water pump can deliver water into the rinsing pipe, which facilitates the cleaning of the guide plate.

[0020] In a preferred embodiment, a snap-fit ​​groove is provided on the upper side wall of the machine body, and the rinsing pipe is snapped into the snap-fit ​​groove. Limiting blocks are fixedly provided on the outer side walls at both ends of the rinsing pipe. A limiting groove is provided on the machine body at the upper end of the snap-fit ​​groove. The snap-fit ​​groove and the limiting groove can limit the rinsing pipe and facilitate the picking and putting of the rinsing pipe.

[0021] In a preferred embodiment, a plurality of nozzles are evenly spaced on the rinsing pipe, the rinsing pipe is connected to the water pump via a rubber hose, and a support plate is provided at the bottom of the machine body for placing the rinsing pipe, the support plate facilitating the placement of the rinsing pipe.

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

[0023] 1. This utility model has a compact structure and high integration by setting up a scraper reduction motor, mud-pulling roller shaft, mud-pulling plate, mud-pulling pressure plate, etc. The device adopts a modular design and can realize skid-mounted integration. It is particularly suitable for small and medium-sized sewage treatment plants with limited space. It can improve the problem of uneven distribution of sludge in the feeding stage and improve the processing efficiency of belt filter press.

[0024] 2. This utility model is equipped with a water storage tank, water pump, flushing pipe, snap-fit ​​groove, limiting block, and limiting groove. The flushing pipe can be used to flush the guide plate, which can prevent sludge from adhering to the guide plate after use and facilitate the cleaning of the guide plate. When not in use, the flushing pipe can be easily removed from the machine body to prevent the flushing pipe from affecting the normal use of the equipment. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is an enlarged schematic diagram of the mud-removing plate of this utility model;

[0028] Figure 3 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0029] Figure 4 This utility model Figure 1 Enlarged schematic diagram of the structure at point B.

[0030] In the diagram: 1. Machine body; 2. Feed inlet; 3. Scraper reducer motor; 4. Mud-removing roller shaft; 5. Mud-removing plate; 6. Mud-removing pressure plate; 7. Mud-removing rubber sheet; 8. Discharge outlet; 9. Guide plate; 10. Flushing pipe; 11. Outer spherical ball bearing; 12. Limiting rope; 13. Limiting post; 14. Water storage tank; 15. Water pump; 16. Snap-fit ​​groove; 17. Limiting block; 18. Limiting slide groove; 19. Nozzle; 20. Support plate; 21. Limiting slider. 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] Example 1:

[0033] Please see Figures 1-3 This utility model provides a uniform feeding scraper, the technical solution of which is as follows:

[0034] A uniform feeding scraper includes a body 1. A feed inlet 2 is provided on one side of the upper end of the body 1. A scraping reduction motor 3 is fixedly installed on one side of the outer end of the body 1. The output shaft of the scraping reduction motor 3 is fixedly connected to a mud-removing roller shaft 4 installed inside the body 1. A plurality of mud-removing plates 5 are fixedly installed on the mud-removing roller shaft 4. A mud-removing pressure plate 6 is fixedly installed on the mud-removing pressure plate 6 by bolts. A discharge port 8 is provided at the front end of the body 1. A guide plate 9 is provided at the discharge port 8. A flushing pipe 10 is provided on the body 1 above the guide plate 9.

[0035] In a preferred embodiment, both ends of the sludge-dispensing roller shaft 4 are connected to the side wall of the machine body 1 via outer spherical ball bearings 11. The scraper reduction motor 3 adopts a frequency conversion control system. The outer spherical ball bearings 11 support the sludge-dispensing roller shaft 4 and have a ±1.5° automatic self-aligning function to adapt to slight installation deviations and ensure smooth operation of the scraper assembly. The scraper reduction motor 3 adopts a frequency conversion control system, and the rotational speed of the sludge-dispensing roller shaft 4 can be adjusted according to the real-time sludge flow rate. It usually maintains a ratio of 1:1 to 1:1.2 with the linear speed of the filter belt to ensure uniform sludge feeding and prevent excessive accumulation or insufficient feeding.

[0036] In a preferred embodiment, the upper end of the feed inlet 2 is connected to the discharge frame to receive sludge from the flocculation conditioning tank by gravity or pumping, thus preventing sludge from overflowing. The guide plate 9 at the discharge outlet 8 is connected to the filter belt of the belt sludge thickener and dewatering machine. The angle of the guide plate 9 and the gap between it and the filter belt are adjustable to control the thickness and uniformity of the discharge layer.

[0037] In a preferred embodiment, the bottom end of the guide plate 9 is rotatably mounted on the inner side wall of the machine body 1, and limit sliders 21 are fixedly mounted on both sides of the upper end of the guide plate 9. The limit sliders 21 are slidably mounted in the limit groove 18, and a limit rope 12 is mounted on the limit slider 21. One end of the limit rope 12 passes through the side wall of the machine body 1 and is tied to the limit post 13 on the outer side of the machine body 1. The limit rope 12 can pull the limit slider 21 to move along the limit groove 18 and wrap the limit rope 12 around and fix it on the limit post 13, thereby realizing the adjustment of the tilt angle of the guide plate 9.

[0038] The working principle of this utility model is as follows:

[0039] After flocculation and conditioning, the sludge enters through inlet 2. Under gravity, the sludge falls into the equipment cavity. The scraper reducer motor 3 drives the sludge-pulling roller shaft 4 to rotate. The sludge-pulling roller shaft 4 drives the sludge-pulling plate 5, the sludge-pulling pressure plate 6, and the sludge-pulling rubber sheet 7 to rotate. The sludge-pulling plate 5 and the sludge-pulling pressure plate 6, along with the inner wall of the machine body 1, distribute the sludge evenly towards the discharge port 8. The sludge discharged from the discharge port 8 is discharged through the guide plate 9, ensuring that the sludge falls evenly onto the filter belt of the belt filter press, improving the efficiency of the filter belt. To improve dewatering efficiency, when the angle of the guide plate 9 needs to be adjusted, first clean out the sludge in the limiting chute 18, then pull the limiting rope 12 so that the limiting slider 21 moves the guide plate 9. After adjusting to a suitable angle, wrap the limiting rope 12 around and fix it to the limiting post 13. During use, the guide plate 9 applies a downward force under the pressure of the sludge, while the limiting rope 12 can pull the guide plate 9 without it moving, thus achieving the adjustment of the position of the guide plate 9.

[0040] Example 2:

[0041] Please see Figure 1 and Figure 4 A water storage tank 14 is fixedly installed on the outer side wall of the machine body 1. A water pump 15 is fixedly installed on the upper end of the water storage tank 14. The output end of the water pump 15 is connected to the flushing pipe 10. A snap-fit ​​groove 16 is opened on the upper side wall of the machine body 1. The flushing pipe 10 is snapped into the snap-fit ​​groove 16. Limiting blocks 17 are fixedly installed on the outer side walls of both ends of the flushing pipe 10. A limiting groove is provided on the machine body 1 at the upper end of the snap-fit ​​groove 16. Several nozzles 19 are evenly arranged on the flushing pipe 10. The flushing pipe 10 is connected to the water pump 15 through a rubber hose. A support plate 20 for placing the flushing pipe 10 is provided at the bottom of the machine body 1.

[0042] After use, the flushing pipe 10 can be placed in the snap-fit ​​groove 16 on the machine body 1, and the limiting block 17 can be placed in the limiting groove 18 to fix the flushing pipe 10. Then, turn on the water pump 15. The water pump 15 can pump the water inside the water storage tank 14 to the flushing pipe 10 and spray water on the upper surface of the guide plate 9 using the nozzle 19 at the bottom of the flushing pipe 10. The staff only needs to use the wiping board to wipe and clean the guide plate 9 to prevent the sludge from solidifying on the guide plate 9 and affecting subsequent use.

[0043] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A uniform feeding scraper, comprising a machine body (1), wherein a feed inlet (2) is provided on one side of the upper end of the machine body (1), characterized in that: A scraper reduction motor (3) is fixedly installed on one side of the outer end of the machine body (1). The output shaft of the scraper reduction motor (3) is fixedly connected to the mud-removing roller shaft (4) inside the machine body (1). Multiple mud-removing plates (5) are fixedly installed on the mud-removing roller shaft (4). A mud-removing pressure plate (6) is fixedly installed at the end of the mud-removing plate (5) away from the mud-removing roller shaft (4). A mud-removing rubber sheet (7) is fixedly installed on the mud-removing pressure plate (6) by bolts. A discharge port (8) is opened at the front end of the machine body (1). A guide plate (9) is provided at the discharge port (8). A flushing pipe (10) is provided on the machine body (1) above the guide plate (9).

2. The uniform feeding scraper according to claim 1, characterized in that: Both ends of the mud-removing roller shaft (4) are connected to the side wall of the machine body (1) through an outer spherical ball bearing (11), and the scraper reduction motor (3) adopts a frequency conversion control system.

3. The uniform feeding scraper according to claim 1, characterized in that: The upper end of the feed inlet (2) is connected to the feed frame, and the guide plate (9) at the discharge port (8) is connected to the filter belt of the belt sludge thickener and dewatering machine.

4. The uniform feeding scraper according to claim 1, characterized in that: The bottom end of the guide plate (9) is rotatably mounted on the inner side wall of the machine body (1), and the upper end of the guide plate (9) is fixedly provided with limit sliders (21) on both sides, and the limit sliders (21) are slidably mounted in the limit groove (18).

5. A uniform feeding scraper according to claim 4, characterized in that: The limiting slider (21) is provided with a limiting rope (12), one end of which passes through the side wall of the machine body (1) and is tied to the limiting post (13) on the outside of the machine body (1).

6. The uniform feeding scraper according to claim 1, characterized in that: A water storage tank (14) is fixedly installed on the outer side wall of the body (1), and a water pump (15) is fixedly installed on the upper end of the water storage tank (14). The output end of the water pump (15) is connected to the flushing pipe (10).

7. A uniform feeding scraper according to claim 6, characterized in that: The upper side wall of the body (1) is provided with a snap-fit ​​groove (16), the flushing pipe (10) is snapped into the snap-fit ​​groove (16), the outer side walls of both ends of the flushing pipe (10) are fixedly provided with limit blocks (17), and the upper end of the snap-fit ​​groove (16) is provided on the body (1).

8. A uniform feeding scraper according to claim 7, characterized in that: The flushing pipe (10) is provided with a number of nozzles (19) evenly spaced apart. The flushing pipe (10) is connected to the water pump (15) through a rubber hose. The bottom of the machine body (1) is provided with a support plate (20) for placing the flushing pipe (10).

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