A kind of fecal matter pump and coupling pipe of sandstone wear and cavitation erosion resistant technology of coating

Abstract

This utility model discloses a sewage pump and its coupling pipe with a coating technology for preventing sand and gravel wear and cavitation, relating to the field of pump technology. The utility model includes a pump body, inside which a stator coil is installed. A lower bearing seat is located on the top of the pump body, a machine base is located on top of the lower bearing seat, and an upper bearing seat is located on top of the machine base. This utility model significantly improves the cavitation resistance and wear resistance of the sewage pump by coating the pump body, connecting pipe, and drain pipe with a polyurethane protective layer. The polyurethane coating has excellent wear resistance and cavitation resistance properties, effectively preventing hard particles in the medium from eroding the pump body flow channel and coupling pipe under high-speed operation or high-head conditions, reducing wear on metal surfaces, extending equipment service life, and effectively resisting cavitation caused by local pressure reduction within the pump, preventing pitting and peeling of metal surfaces, ensuring stable pump operation, and improving the adaptability and reliability of the equipment under complex operating conditions.

Description

Technical Field

[0001] This utility model belongs to the field of pump technology, and in particular relates to a sewage pump and coupling pipe with a coating technology to prevent sand and gravel wear and cavitation. Background Technology

[0002] A sludge pump is a centrifugal pump specifically designed for conveying solid particles, fibers, and high-concentration waste. It is widely used in livestock farms, septic tanks, and sewage treatment plants. Its features include the use of wear-resistant materials (such as cast iron and stainless steel) and anti-clogging designs (such as large-flow-channel impellers and cutting devices), enabling efficient handling of viscous, impurity-laden sludge. Common types include submersible, self-priming, and cutting pumps, offering corrosion resistance, anti-winding properties, and strong sewage discharge capabilities. Some models are equipped with automatic control systems for continuous operation. When selecting a pump, flow rate, head, media characteristics, and installation environment must be considered to ensure long-term stable operation.

[0003] Current sewage pumps, when operating at high speeds or under high head conditions, are prone to cavitation due to local pressure reduction within the pump. This can cause pitting, peeling, and even structural damage to the metal surface. Hard particles in the medium can continuously erode the pump body's flow channels and coupling pipes, leading to rapid wear of the metal surface and reducing the pump's efficiency and lifespan.

[0004] To address these issues, we provide a sewage pump and coupling pipe with a coating technology that prevents sand and gravel wear and cavitation, thus solving the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a sewage pump and coupling pipe with a coating technology to prevent sand and gravel wear and cavitation, which solves the problem that hard particles in the medium will continuously erode the pump body flow channel and coupling pipe under high-speed operation or high-lift conditions, reducing the service life of the equipment.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model is a sewage pump and coupling pipe with a coating technology for sand and gravel abrasion and cavitation resistance. It includes a pump body, a stator coil installed inside the pump body, a lower bearing seat on the top of the pump body, a machine base on the top of the lower bearing seat, an upper bearing seat on the top of the machine base, a top cover on the top of the upper bearing seat, a rotor inside the machine base, an impeller inside the pump body, a first mechanical seal installed on the surface of the rotor, a cable on the top of the top cover, a connecting pipe connected to the outlet on one side of the pump body, a drain pipe on one side of the connecting pipe, and a protective layer coated on the drain pipe, the connecting pipe and the inside of the pump body. The protective layer (13) is a polyurethane coating. The polyurethane coating uses polyurethane (PU) as the film-forming substance and forms a continuous film on the surface of the substrate through a coating process. The urethane groups in the polyurethane molecular chain have good flexibility, wear resistance, chemical resistance and elasticity, giving the substrate waterproof, breathable, wear-resistant and weather-resistant properties.

[0008] The present invention is further configured such that a first internal hexagon bolt is provided at the bottom of the impeller, the top of the first internal hexagon bolt passes through the impeller and is threadedly connected to the rotor output end, and a flat key is installed at the bottom of the rotor output end.

[0009] The present invention is further configured such that a base is provided at the bottom of the pump body, and a second internal hex bolt is installed between the base and the pump body.

[0010] The present invention is further configured such that a third hexagon socket bolt is installed between the lower bearing housing and the pump body, a first sealing ring is installed on the top of the pump body, a screw plug is installed inside the base, a second mechanical seal is installed inside the base, and a deep groove ball bearing is installed on the top of the base.

[0011] The present invention is further configured such that a grounding screw is threadedly connected to the top of the base, a lifting eye bolt is installed on the top of the top cover, and a nameplate is installed on the top of the top cover.

[0012] The present invention is further configured such that a fourth hexagon socket bolt is installed between the base and the lower bearing seat, and a fifth hexagon socket bolt is installed between the lower bearing seat and the top cover.

[0013] The present invention is further configured such that a cylinder cover is installed inside the lower bearing housing, the protective layer is a polyurethane coating, and an internally threaded cylinder is installed on the surface of the cable, the internally threaded cylinder being connected to the top cover by threads.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model significantly improves the anti-cavitation and anti-wear performance of the sewage pump by coating the pump body, connecting pipe and drain pipe with a polyurethane protective layer. The polyurethane coating has excellent wear resistance and anti-cavitation properties, which can effectively prevent hard particles in the medium from eroding the pump body flow channel and coupling pipe under high-speed operation or high-head conditions, reduce wear on metal surfaces, extend equipment service life, and the protective coating can also effectively resist cavitation caused by local pressure reduction in the pump, avoid pitting and peeling of metal surfaces, ensure stable operation of the pump, and improve the adaptability and reliability of the equipment under complex working conditions.

[0016] 2. This utility model significantly improves the sealing performance and safety of the sewage pump by optimizing the internal structural design and adopting a dual sealing structure of a first mechanical seal and a second mechanical seal. The first mechanical seal is installed on the rotor surface to prevent leakage of sewage and media, while the second mechanical seal is installed inside the base to further prevent media leakage and ensure the sealing performance of the pump body. The impeller and rotor are connected by a first internal hex bolt and a key to ensure the stability and reliability of power transmission, thus meeting the needs of farms, septic tanks, sewage treatment and other fields for efficient and durable sewage pumps.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional view of a sewage pump and its coupling pipe, which utilizes a coating technology to prevent sand and gravel wear and cavitation.

[0020] Figure 2 A sewage pump and coupling pipe with a coating technology to prevent sand and gravel wear and cavitation Figure 1 A magnified view of A in the middle.

[0021] Figure 3 This is a schematic diagram of the connection between the connecting pipe and the drainage pipe in a sewage pump and coupling pipe, which is a type of coated anti-sand and anti-cavitation technology.

[0022] Figure 4 This is a cross-sectional view of a sewage pump and its coupling pipe, which utilizes a coating technology to prevent sand and gravel wear and cavitation.

[0023] In the attached diagram: 1. Pump body; 2. Stator coil; 3. Lower bearing housing; 4. Base; 5. Upper bearing housing; 6. Top cover; 7. Rotor; 8. Impeller; 9. First mechanical seal; 10. Cable; 11. Connecting pipe; 12. Drain pipe; 13. Protective layer; 14. First hexagon socket head cap bolt; 15. Flat key; 16. Base; 17. Second hexagon socket head cap bolt; 18. Third hexagon socket head cap bolt; 19. First sealing ring; 20. Plug; 21. Second mechanical seal; 22. Deep groove ball bearing; 23. Grounding screw; 24. Lifting eye bolt; 25. Fourth hexagon socket head cap bolt; 26. Fifth hexagon socket head cap bolt; 27. Cylinder cover. Detailed Implementation

[0024] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Example 1

[0025] Please see Figures 1-4 This utility model relates to a sewage pump and coupling pipe with a coating technology for preventing sand and gravel wear and cavitation. It includes a pump body 1, a stator coil 2 installed inside the pump body 1, a lower bearing seat 3 on the top of the pump body 1, a base 4 on the top of the lower bearing seat 3, an upper bearing seat 5 on the top of the base 4, a top cover 6 on the top of the upper bearing seat 5, a rotor 7 inside the base 4, an impeller 8 inside the pump body 1, a first mechanical seal 9 installed on the surface of the rotor 7, a cable 10 on the top of the top cover 6, a connecting pipe 11 connected to the outlet on one side of the pump body 1, a drain pipe 12 on one side of the connecting pipe 11, and a protective layer 13 coated on the drain pipe 12, the connecting pipe 11, and the inside of the pump body 1.

[0026] Specifically: Pump body 1, as the main structure of the sewage pump, houses and supports internal components, ensuring the overall strength and stability of pump body 1. It also provides installation space for impeller 8 and other components, ensuring efficient pump operation. Stator coil 2, installed inside pump body 1, generates an electromagnetic field to drive rotor 7 to rotate, thereby rotating impeller 8 and achieving sewage transport. It features high-efficiency energy conversion. Lower bearing housing 3, located at the top of pump body 1, supports and fixes rotor 7, ensuring the stability and accuracy of rotor 7 during high-speed rotation, reducing vibration and wear, and extending equipment life. Base 4, located on top of lower bearing housing 3, fixes and supports upper bearing housing 5 and top cover 6, providing mechanical strength and stability, while also providing space for internal mechanical seals and... The rotor 7 provides installation space, and the top cover 6 is located on top of the upper bearing seat 5 to seal the upper part of the pump body 1, protecting the internal components from the influence of the external environment. It also provides an installation interface for the cable 10 to ensure the safety of electrical connections. The coating of this utility model, namely the polyurethane coating, uses polyurethane (PU) as the main film-forming substance. Through coating processes (such as scraping, spraying, roller coating, etc.), a continuous thin film is formed on the surface of the substrate. The urethane groups in the polyurethane molecular chain can undergo physical adsorption or chemical reaction with the hydroxyl, carboxyl and other groups on the surface of the metal substrate, thereby adhering firmly. Its coating has good flexibility, wear resistance, chemical resistance and elasticity. The formula can be adjusted according to needs to give the substrate waterproof, breathable, wear-resistant and weather-resistant properties. Example 2

[0027] Please see Figures 1-4 Based on Embodiment 1, a first hexagon socket head cap screw 14 is provided at the bottom of the impeller 8. The top of the first hexagon socket head cap screw 14 passes through the impeller 8 and is threadedly connected to the output end of the rotor 7. A flat key 15 is installed at the bottom of the output end of the rotor 7. A base 16 is provided at the bottom of the pump body 1. A second hexagon socket head cap screw 17 is installed between the base 16 and the pump body 1. A third hexagon socket head cap screw 18 is installed between the lower bearing seat 3 and the pump body 1. A first sealing ring 19 is installed at the top of the pump body 1. A screw plug 20 is installed inside the base 4. A second sealing ring 19 is installed inside the base 4. Mechanical seal 21, deep groove ball bearing 22 installed on top of base 4, grounding screw 23 threaded connection on top of base 4, lifting eye bolt 24 installed on top of top cover 6, nameplate installed on top of top cover 6, fourth hexagon socket bolt 25 installed between base 4 and lower bearing housing 3, fifth hexagon socket bolt 26 installed between lower bearing housing 3 and top cover 6, cylinder cover 27 installed inside lower bearing housing 3, protective layer 13 is polyurethane coated, internal threaded cylinder is installed on surface of cable 10, internal threaded cylinder is threaded connection to top cover 6.

[0028] Specifically: Installed inside the base 4, driven by the electromagnetic field generated by the stator coil 2, the impeller 8 rotates to transport sewage, featuring high efficiency and high durability. Installed inside the pump body 1, driven by the rotation of the rotor 7, centrifugal force is generated to discharge sewage from inside the pump body 1, featuring high efficiency and large flow rate, capable of handling sewage containing solid particles. The first mechanical seal 9 is installed on the surface of the rotor 7 to prevent leakage of sewage and media, ensuring the pump's sealing and safety, and extending the equipment's service life. The cable 10 is installed on the top of the top cover 6 to connect the power supply, providing power to the stator coil 2 to ensure the normal operation of the rotor 7, featuring waterproof and wear-resistant characteristics. The protective layer 13 is coated on the drain pipe 12, connecting pipe 11, and the inside of the pump body 1, using a polyurethane coating, which has excellent wear resistance and anti-cavitation performance, effectively preventing sand and gravel wear and cavitation phenomena, and extending the equipment's service life.

[0029] The working principle of this utility model is as follows: After the stator coil 2 is energized, it generates an electromagnetic field, which drives the rotor 7 to rotate. The rotor 7 is connected to the impeller 8 through the flat key 15, which drives the impeller 8 to rotate. During the rotation, the impeller 8 generates centrifugal force, which draws sewage from the inside of the pump body 1 and discharges it through the connecting pipe 11 and the drain pipe 12. The first mechanical seal 9 is installed on the surface of the rotor 7 to prevent sewage and media leakage and ensure the sealing of the pump body 1. The second mechanical seal 21 is installed inside the base 4 to further prevent media leakage and ensure the sealing and safety of the equipment. The pump body 1, the connecting pipe 11 and the drain pipe 12 are all coated with a protective layer 13. The protective layer 13 is made of polyurethane coating, which has excellent wear resistance and anti-cavitation performance. Under high-speed operation or high-head conditions, the protective layer 13 can effectively prevent hard particles in the medium from scouring the flow channel and coupling pipe of the pump body 1, reducing wear and extending the service life of the equipment. At the same time, the protective layer 13 can effectively resist cavitation and prevent pitting and peeling of metal surfaces caused by local pressure reduction inside the pump body 1, ensuring the stable operation of the pump.

[0030] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A sewage pump and coupling pipe with a coating technology for preventing sand and gravel wear and cavitation, comprising a pump body (1), characterized in that: The pump body (1) is equipped with a stator coil (2) inside. A lower bearing seat (3) is provided on the top of the pump body (1). A base (4) is provided on the top of the lower bearing seat (3). An upper bearing seat (5) is provided on the top of the base (4). A top cover (6) is provided on the top of the upper bearing seat (5). A rotor (7) is provided inside the base (4). An impeller (8) is provided inside the pump body (1). A first mechanical seal (9) is installed on the surface of the rotor (7). A cable (10) is provided on the top of the top cover (6). The pump body (1) One side of the water outlet is connected to a connecting pipe (11), and a drain pipe (12) is provided on one side of the connecting pipe (11). The drain pipe (12), the connecting pipe (11) and the pump body (1) are all coated with a protective layer (13). The protective layer (13) is a polyurethane coating. The polyurethane coating uses polyurethane (PU) as the film-forming substance and forms a continuous film on the surface of the substrate through a coating process. The urethane groups in the polyurethane molecular chain have good flexibility, wear resistance, chemical resistance and elasticity, giving the substrate waterproof, breathable, wear-resistant and weather-resistant properties.

2. A sand and stone abrasion and cavitation erosion resistant technical excrement pump and coupling pipe coated with a film according to claim 1, characterized in that: The impeller (8) is provided with a first internal hex bolt (14) at the bottom. The top of the first internal hex bolt (14) passes through the impeller (8) and is threadedly connected to the output end of the rotor (7). A flat key (15) is installed at the bottom of the output end of the rotor (7).

3. A sand and stone abrasion and cavitation erosion resistant technical excrement pump and coupling pipe coated with a film according to claim 1, characterized in that: The pump body (1) is provided with a base (16) at the bottom, and a second internal hex bolt (17) is installed between the base (16) and the pump body (1).

4. The sewage pump and coupling pipe with a coating technology for preventing sand and gravel wear and cavitation as described in claim 1, characterized in that: A third hexagonal bolt (18) is installed between the lower bearing housing (3) and the pump body (1). A first sealing ring (19) is installed on the top of the pump body (1). A screw plug (20) is installed inside the base (4). A second mechanical seal (21) is installed inside the base (4). A deep groove ball bearing (22) is installed on the top of the base (4).

5. A sand and stone abrasion and cavitation erosion resistant technical excrement pump and coupling pipe coated with a film according to claim 1, characterized in that: The base (4) is threaded with a grounding screw (23) at the top, the top cover (6) is fitted with a lifting eye bolt (24) at the top, and the top cover (6) is fitted with a nameplate.

6. A sand and stone abrasion and cavitation erosion resistant technical excrement pump and coupling pipe coated with a film according to claim 1, characterized in that: A fourth hexagonal bolt (25) is installed between the base (4) and the lower bearing seat (3), and a fifth hexagonal bolt (26) is installed between the lower bearing seat (3) and the top cover (6).

7. A sand and stone abrasion and cavitation erosion resistant technical excrement pump and coupling pipe coated with a film according to claim 1, characterized in that: The lower bearing housing (3) is equipped with a cylinder cover (27), and the cable (10) is equipped with an internal threaded cylinder. The internal threaded cylinder is connected to the top cover (6) by threads.

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