A debris filtration and protection device for a submersible sewage pump

Abstract

This utility model relates to the technical field of auxiliary equipment for submersible sewage pumps, and discloses a debris filtration and protection device for a submersible sewage pump. It includes an outer filter cylinder and an inner filter cylinder, with the inner filter cylinder fixed inside the outer filter cylinder. One end of the outer filter cylinder is fitted with a mounting flange for connection to the inlet of the submersible sewage pump, and the other end is fitted with a filter cover. This utility model employs a double-layer filtration structure with an outer and inner filter cylinder, effectively filtering debris of different sizes, greatly improving the filtration effect, preventing debris from entering the submersible sewage pump and causing damage, protecting the normal operation of the submersible sewage pump, and extending its service life.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for submersible sewage pumps, and specifically to a debris filtration and protection device for a submersible sewage pump. Background Technology

[0002] Submersible sewage pumps are a type of pump used to transport sewage containing solid particles, fibers, and other debris. They are widely used in municipal engineering, sewage treatment plants, and industrial wastewater treatment. During operation, the water often contains a large amount of debris, such as plastic bags, branches, and stones. This debris easily enters the pump's inlet, causing blockage. Once the inlet is blocked, the pump's internal temperature rises due to insufficient flow, and prolonged operation may cause the pump to burn out. This not only affects the pump's normal operation but also increases maintenance costs and replacement frequency, causing considerable inconvenience to production and daily life.

[0003] Currently, although some submersible sewage pumps have simple filtration devices installed at the inlet, most of these filtration devices are single-layer structures with poor filtration effects. They either cannot effectively block small debris or are easily clogged by large debris and are not easy to clean, making it difficult to meet actual usage needs. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a debris filtration and protection device for a submersible pump to solve the problems mentioned in the background art.

[0005] To achieve the aforementioned objectives of this utility model, the technical solution adopted is as follows:

[0006] A debris filtration and protection device for a submersible sewage pump includes an outer filter cylinder and an inner filter cylinder. The inner filter cylinder is fixed inside the outer filter cylinder. One end of the outer filter cylinder is equipped with a mounting flange for connecting to the inlet of the submersible sewage pump, and the other end is equipped with a filter cover.

[0007] As a further improvement of this utility model, the filter cover is connected to the outer filter cylinder by a snap fastener, which facilitates the cleaning of debris inside the outer filter cylinder and the inner filter cylinder. The snap fastener is a conventional technical means for those skilled in the art.

[0008] As a further improvement of this utility model, the outer filter cartridge includes a wire cage, one end of which is provided with an annular connecting part. An annular connecting plate is fixed on the mounting flange. The annular connecting plate is provided with multiple L-shaped slots. A connecting bolt corresponding to the L-shaped slot is fixed circumferentially on the annular connecting part. After the connecting bolt passes through the L-shaped slot, a locking nut is threaded onto it. In use, the outer filter cartridge is first inserted into the interior of the annular connecting plate, while the connecting bolt passes through the vertical slot of the L-shaped slot. Then, the outer filter cartridge is rotated so that the connecting bolt is located in the horizontal slot of the L-shaped slot. Finally, the locking nut is tightened to fix the outer filter cartridge to the mounting flange.

[0009] As a further improvement of this utility model, the mesh size of the wire cage is 30mm*30mm.

[0010] As a further improvement of this utility model, the inner filter cylinder includes a cylindrical steel reinforcement skeleton, a layer of dense mesh is circumferentially fitted on the cylindrical steel reinforcement skeleton, and an annular filter plate is circumferentially fixed at one end of the cylindrical steel reinforcement skeleton. The annular filter plate is connected to the inner wall of the annular connecting part of the outer filter cylinder.

[0011] As a further improvement of this utility model, the annular filter plate is connected to the inner wall of the annular connecting part of the outer filter cylinder by multiple snap locks in the circumferential direction, which facilitates disassembly and cleaning.

[0012] The beneficial effects of this utility model are: This utility model adopts a double-layer filtration structure of an outer filter cartridge and an inner filter cartridge, which can effectively filter debris of different sizes, greatly improve the filtration effect, prevent debris from entering the submersible pump and causing damage, protect the normal operation of the submersible pump, and extend its service life.

[0013] Meanwhile, the filter cover is connected to the outer filter cartridge via snap-fit, the inner filter cartridge is connected to the outer filter cartridge via a snap-lock, and the outer filter cartridge is connected to the mounting flange via L-shaped grooves, connecting bolts, and lock nuts. These connection methods facilitate disassembly and installation, making it easy to clean and maintain the filtration device, and the operation is simple and convenient. In addition, the entire device has a reasonable structural design, low manufacturing cost, and is suitable for widespread application. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an exploded structural diagram of the present invention.

[0017] In the diagram: 1. Outer filter cartridge, 11. Wire cage, 12. Annular connecting part, 13. Connecting bolt, 14. Locking nut, 2. Inner filter cartridge, 21. Cylindrical steel reinforcement frame, 22. Dense mesh, 23. Annular filter plate, 3. Mounting flange, 31. Annular connecting plate, 32. L-shaped groove, 4. Filter cover. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] like Figure 1-2 As shown, a debris filtration and protection device for a submersible sewage pump includes an outer filter cylinder 1 and an inner filter cylinder 2. The inner filter cylinder 2 is fixed inside the outer filter cylinder 1. One end of the outer filter cylinder 1 is equipped with a mounting flange 3 for connecting to the inlet of the submersible sewage pump, and the other end is equipped with a filter cover 4.

[0021] The filter cover 4 is connected to the outer filter cylinder 1 by a snap fastener (not shown in the figure), which facilitates cleaning of debris inside the outer filter cylinder 1 and the inner filter cylinder 2. The snap fastener is a conventional technical means for those skilled in the art.

[0022] The outer filter cartridge 1 includes a wire cage 11, one end of which is provided with an annular connecting part 12. An annular connecting plate 31 is fixed on the mounting flange 3. The annular connecting plate 31 is provided with multiple L-shaped slots 32. The annular connecting part 12 is circumferentially fixed with connecting bolts 13 corresponding to the L-shaped slots 32. The connecting bolts 13 pass through the L-shaped slots 32 and are threadedly connected to a locking nut 14. In use, the outer filter cartridge 1 is first inserted into the interior of the annular connecting plate 31, while the connecting bolts 13 pass through the vertical slots of the L-shaped slots 32. Then, the outer filter cartridge 1 is rotated so that the connecting bolts 13 are located in the horizontal slots of the L-shaped slots 32. Then, the locking nut 14 is tightened to fix the outer filter cartridge 1 to the mounting flange 3.

[0023] The wire cage 11 has a mesh size of 30mm*30mm.

[0024] The inner filter cylinder 2 includes a cylindrical steel reinforcement frame 21, with a layer of dense mesh 22 circumferentially fitted around the cylindrical steel reinforcement frame 21. An annular filter plate 23 is circumferentially fixed at one end of the cylindrical steel reinforcement frame 21, and the annular filter plate 23 is connected to the inner wall of the annular connecting part 12 of the outer filter cylinder 1.

[0025] The annular filter plate 23 is circumferentially connected to the inner wall of the annular connecting part 12 of the outer filter cylinder 1 by multiple snap locks, which facilitates disassembly and cleaning.

[0026] In this embodiment, both the buckle and the latch lock are conventional technical means for those skilled in the art, and both can be the latch lock disclosed in patent application number CN201420583928.2.

[0027] Working principle:

[0028] In use, the filter protection device is connected to the inlet of the submersible sewage pump via mounting flange 3. When sewage enters the device, it first passes through the wire mesh 11 of the outer filter cylinder 1, where the 30mm*30mm mesh filters out larger debris. Then, the sewage enters the inner filter cylinder 2, where the dense mesh 22 of the cylindrical steel frame 21 further filters out smaller debris. The sewage after double filtration enters the submersible sewage pump.

[0029] When it is necessary to clean debris, open the buckle connecting the filter cover 4 and the outer filter cylinder 1 to clean the debris inside the outer filter cylinder 1. To clean the inner filter cylinder 2, open the latch connecting the annular filter plate and the inner wall of the annular connection part 12 of the outer filter cylinder 1, remove the inner filter cylinder 2 for cleaning, and then reinstall it after cleaning.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, component disassembly or combination, 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 debris filter protection device for a submersible sewage pump, characterized by: It includes an outer filter cartridge and an inner filter cartridge, wherein the inner filter cartridge is fixed inside the outer filter cartridge, and one end of the outer filter cartridge is equipped with a mounting flange for connecting to the inlet of a submersible pump, and the other end is equipped with a filter cover. The outer filter cartridge includes a wire cage, one end of which is provided with an annular connecting part. An annular connecting plate is fixed on the mounting flange. Multiple L-shaped slots are provided on the annular connecting plate. A connecting bolt corresponding to the L-shaped slot is fixed circumferentially on the annular connecting part. After the connecting bolt passes through the L-shaped slot, a locking nut is threaded onto it. The inner filter cylinder includes a cylindrical steel reinforcement frame, with a layer of dense mesh surrounding the cylindrical steel reinforcement frame. An annular filter plate is fixed to one end of the cylindrical steel reinforcement frame, and the annular filter plate is connected to the inner wall of the annular connecting part of the outer filter cylinder.

2. The debris filtration and protection device for a submersible sewage pump according to claim 1, characterized in that: The filter cover is connected to the outer filter cylinder by a snap fastener.

3. The debris filtration and protection device for a submersible sewage pump according to claim 1, characterized in that: The wire mesh size of the wire cage is 30mm*30mm.

4. The debris filtration and protection device for a submersible sewage pump according to claim 1, characterized in that: The annular filter plate is circumferentially connected to the inner wall of the annular connecting part of the outer filter cylinder by multiple snap locks.

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