Sewage pretreatment device

Abstract

The utility model relates to the technical field of sewage pretreatment tools, in particular to a sewage pretreatment device which comprises a lower filter cartridge, a filter screen is fixedly mounted on the bottom wall of the lower filter cartridge, a water outlet cartridge is fixedly mounted on the bottom surface of the lower filter cartridge, the filter screen is positioned right above the water outlet cartridge, impurity holes are formed in one side wall of the lower filter cartridge, and the filter screen is positioned right above the water outlet cartridge. An impurity discharging hopper is fixedly installed on the hole wall of the impurity hole, a backflow pipe is fixedly installed on a bottom plate body of the impurity discharging hopper, the tail end of the backflow pipe is fixedly installed on the water outlet cylinder, a water seepage net is fixedly installed on the top pipe wall of the backflow pipe, and a rotating shaft is rotationally connected between the front side plate body and the rear side plate body of the lower filter cylinder; a plurality of scraping plates are fixedly mounted on the rotating shaft, the scraping plates are used for scraping impurities on the filter screen until the impurities fall out from the impurity holes, a top cover is fixedly mounted on the top surface of the lower filter cartridge, and a water inlet pipe is fixedly mounted on the top cover. The device can be used for impurity pretreatment and impurity cleaning operation, and is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage pretreatment tools, in particular to a sewage pretreatment device. Background Art

[0002] Water shortage is a common problem facing the world. With the growth of population and economic development, the demand for water resources continues to increase, while the available water resources are decreasing. Therefore, the treatment and reuse of sewage is particularly important. At present, corresponding sewage treatment equipment is usually used for sewage treatment operations. However, this type of sewage treatment equipment can generally only treat wastewater with less particulate impurities and smaller particle sizes. When encountering wastewater containing more and larger impurities, it is necessary to install corresponding sewage pretreatment devices on the sewage treatment equipment to pretreat the sewage.

[0003] The sewage pretreatment devices on the market generally use filter nets to filter out more and larger impurities in sewage to achieve the pretreatment effect. However, this type of sewage pretreatment device has the defect of not being able to actively remove impurities on the filter net when in use. As more and more impurities accumulate on the filter net, the filtering effect of the filter net will be affected, and manual cleaning is required regularly, which brings inconvenience to users. In view of this, we propose a sewage pretreatment device. Utility Model Content

[0004] The purpose of the utility model is to provide a sewage pretreatment device to solve the defects mentioned in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The filter press has a bottom surface, and the filter presses the filter screen to the bottom surface, and the filter screen is located above the filter screen.

[0007] Preferably, the filter screen is located inside the lower projection of the water outlet cylinder, so that water flows into the water outlet cylinder along the filter screen to realize the waste water discharge operation.

[0008] Preferably, the impurity discharge bucket is tilted downward by 45° to 60° for the removal of debris and impurities.

[0009] Preferably, the impurity hole is located below the rotating shaft, so that after the scraper plate rotates to the impurity hole, the scraper plate is tilted downward by 30° to 45° to perform unloading operations.

[0010] Preferably, the water inlet pipe is located on the top cover at a position deviating from its center, so as to be used for water flow to impact the scraper plate and drive the scraper plate to rotate.

[0011] Preferably, a smooth layer is provided on the surface of the scraper plate, and the smooth layer is used to reduce friction so that impurities can be discharged outward from the impurity hole along the scraper plate more smoothly.

[0012] Preferably, the top cover is provided with an inspection hole, and the inspection hole is used for maintenance operations.

[0013] Preferably, a sealing cover plate is hinged on one side wall of the inspection hole through a hinge, and the other end of the sealing cover plate is fixedly connected to the top cover by fastening bolts, so as to seal the inspection hole and prevent water from splashing outward.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model realizes the operation of filtering waste water by using the filter net by providing the lower filter cylinder and the filter net. In addition, by providing the scraper plate and the water inlet pipe, water enters from the water inlet pipe and impacts the scraper plate, driving the scraper plate to rotate. After the scraper plate rotates, the impurities on the filter net are pushed to fall out from the impurity hole, thereby realizing the cleaning operation of the impurities and achieving the effect of actively cleaning the impurities on the filter net.

[0016] 2. The utility model provides a seepage net so that the water entering the impurity discharge bucket can pass through the seepage net and then flow back to the water outlet tube along the reflux pipe. In addition, the provided inspection hole and plugging cover make it easy to open the plugging cover to perform cleaning and maintenance operations at the inspection hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 3It is a partial structural schematic diagram of the utility model;

[0020] Figure 4 It is a cross-sectional view of the lower filter cylinder and the water outlet cylinder of the utility model;

[0021] Figure 5 It is a cross-sectional view of the impurity discharge bucket and the reflux pipe of the utility model.

[0022] The meaning of each number in the figure is:

[0023] 1. Lower filter cylinder; 10. Impurity hole; 11. Filter screen; 12. Water outlet cylinder; 13. Impurity discharge bucket; 14. Reflux pipe; 15. Water seepage net; 16. Rotating shaft; 17. Scraper plate; 171. Smooth layer;

[0024] 2. Top cover; 20. Water inlet pipe; 21. Inspection hole; 22. Sealing cover. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 5 The utility model provides a technical solution: a sewage pretreatment device, comprising a lower filter cartridge 1, a filter screen 11 is fixedly mounted on the bottom wall of the lower filter cartridge 1, the filter screen 11 is used to filter the wastewater, a water outlet cartridge 12 is fixedly mounted on the bottom surface of the lower filter cartridge 1, the filter screen 11 is located directly above the water outlet cartridge 12, the filter screen 11 is located inside the lower projection of the water outlet cartridge 12, and the water flows along the filter screen 11 into the water outlet cartridge 12 to realize the discharge operation of the wastewater;

[0027] Specifically, an impurity hole 10 is provided on one side wall of the lower filter cylinder 1, an impurity discharge bucket 13 extending outward is fixedly installed on the hole wall of the impurity hole 10, a return pipe 14 is fixedly installed on the bottom plate of the impurity discharge bucket 13, the end of the return pipe 14 is fixedly installed on the water outlet cylinder 12, and a water seepage net 15 is fixedly installed on the top pipe wall of the return pipe 14, so that the water entering the impurity discharge bucket 13 can pass through the water seepage net 15 and enter the water outlet cylinder 12 along the return pipe 14;

[0028] Specifically, a rotating shaft 16 is rotatably connected between the front and rear side plates of the lower filter cylinder 1, and a plurality of scraper plates 17 arranged in a ring with equal intervals are fixedly installed on the rotating shaft 16. The scraper plates 17 are used to scrape impurities on the filter screen 11 until they fall out from the impurity holes 10. The impurity holes 10 are located below the rotating shaft 16. After the scraper plates 17 rotate to the impurity holes 10, the scraper plates 17 are tilted downward by 30° to 45° for unloading operations. When the scraper plates 17 rotate, the impurities on the filter screen 11 can be pushed to be discharged outward from the impurity holes 10 and the impurity discharge bucket 13, thereby completing the debris discharge operation.

[0029] In this embodiment, a top cover 2 is fixedly mounted on the top surface of the lower filter cartridge 1 , and a water inlet pipe 20 is fixedly mounted on the top cover 2 , which facilitates water inlet operation, and the top cover 2 can prevent water from splashing.

[0030] Specifically, the impurity discharge bucket 13 is inclined downward by 45° to 60°, and is used for the operation of dropping out debris and impurities.

[0031] Furthermore, the water inlet pipe 20 is located on the top cover 2 at a position deviated from the center thereof, and is used for the water flow to impact the scraper plate 17 to drive the scraper plate 17 to rotate, thereby realizing the operation of pushing the impurities.

[0032] In addition, a smooth layer 171 is provided on the surface of the scraper plate 17. The smooth layer 171 can be made by mirror polishing. The smooth layer 171 is used to reduce friction so that impurities can be discharged outward from the impurity hole 10 along the scraper plate 17 more smoothly.

[0033] It is worth noting that a maintenance hole 21 is provided on the top cover 2, and the maintenance hole 21 is used for maintenance operations.

[0034] It is worth noting that a sealing cover plate 22 is hinged on one side wall of the inspection hole 21, and the other end of the sealing cover plate 22 is fixedly connected to the top cover 2 by fastening bolts, so as to seal the inspection hole 21 and prevent water from splashing outward.

[0035] When the sewage pretreatment device of the utility model is in use, the water inlet pipe 20 is connected to the external wastewater entering the pipeline. As the wastewater enters along the water inlet pipe 20, the wastewater impacts the scraper plate 17 and can drive the scraper plate 17 to rotate. In addition, the wastewater flows downward through the filter screen 11 to complete the filtering operation. The impurities are blocked on the filter screen 11, and the filtered wastewater is discharged outward along the water outlet cylinder 12. In addition, after the scraper plate 17 rotates, the impurities in the lower filter cylinder 1 can be pushed to be discharged from the impurity hole 10 and the impurity discharge bucket 13. The water entering the impurity discharge bucket 13 can pass through the seepage net 15 and then pass through the reflux pipe 14 into the water outlet cylinder 12 to complete the pretreatment operation.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A sewage pretreatment device, comprising a lower filter cartridge (1), characterized in that: A filter screen (11) is fixedly mounted on the bottom wall of the lower filter cartridge (1), a water outlet cartridge (12) is fixedly mounted on the bottom surface of the lower filter cartridge (1), the filter screen (11) is located directly above the water outlet cartridge (12), an impurity hole (10) is provided on one side wall of the lower filter cartridge (1), an impurity discharge bucket (13) extending outward is fixedly mounted on the hole wall of the impurity hole (10), a return pipe (14) is fixedly mounted on the bottom plate of the impurity discharge bucket (13), and the end of the return pipe (14) is fixedly mounted on the On the water outlet cylinder (12), a water seepage net (15) is fixedly mounted on the top tube wall of the return pipe (14); a rotating shaft (16) is rotatably connected between the front and rear side plates of the lower filter cylinder (1); a plurality of scraper plates (17) arranged in a ring shape and at equal intervals are fixedly mounted on the rotating shaft (16); the scraper plates (17) are used to scrape impurities on the filter net (11) until they fall out from the impurity holes (10); a top cover (2) is fixedly mounted on the top surface of the lower filter cylinder (1); and a water inlet pipe (20) is fixedly mounted on the top cover (2).

2. The sewage pretreatment device according to claim 1, characterized in that: The filter screen (11) is located inside the lower projection of the water outlet cylinder (12) and is used for water to flow into the water outlet cylinder (12) along the filter screen (11).

3. The sewage pretreatment device according to claim 1, characterized in that: The impurity discharge bucket (13) is inclined downward at 45° to 60° and is used for the operation of dropping out debris and impurities.

4. The sewage pretreatment device according to claim 1, characterized in that: The impurity hole (10) is located below the rotating shaft (16), and after the scraper plate (17) rotates to the impurity hole (10), the scraper plate (17) is tilted downward by 30° to 45° to perform a discharging operation.

5. The sewage pretreatment device according to claim 1, characterized in that: The water inlet pipe (20) is located on the top cover (2) at a position deviated from the center thereof, and is used for the water flow to impact the scraper plate (17) to drive the scraper plate (17) to rotate.

6. The sewage pretreatment device according to claim 5, characterized in that: The surface of the scraper plate (17) is provided with a smooth layer (171), and the smooth layer (171) is used to reduce friction.

7. The sewage pretreatment device according to claim 1, characterized in that: The top cover (2) is provided with an inspection hole (21), and the inspection hole (21) is used for inspection operations.

8. The sewage pretreatment device according to claim 7, characterized in that: A blocking cover plate (22) is hingedly connected to a hole wall on one side of the inspection hole (21) via a hinge, and the other end of the blocking cover plate (22) is fixedly connected to the top cover (2) via a fastening bolt.

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