A structure for preventing axial movement and jamming in horizontal installation of submersible multistage pumps

Abstract

This utility model discloses a horizontally mounted submersible multistage pump structure to prevent axial movement and jamming, relating to the field of submersible pump technology. It includes a pump casing assembly and an impeller assembly. The pump casing assembly contains an impeller shaft, and multiple impeller assemblies are mounted on the impeller shaft. A wear-resistant ring of fluoroplastic wear-resistant alloy structure is installed on the inner wall of the pump casing assembly. This horizontally mounted submersible pump structure prevents axial movement and jamming by installing a wear-resistant ring of fluoroplastic wear-resistant alloy structure on the sealing surface of the pump casing assembly where it contacts the impeller. The wear-resistant ring is annularly fitted onto the sealing surface of the pump casing, directly preventing axial movement of the impeller assembly caused by horizontal mounting forces from directly contacting the inner wall of the casing. The fluoroplastic wear-resistant alloy material is high-temperature resistant and low-friction, and combined with the surface wear-resistant coating, it reduces frictional heat generation, avoiding the high-temperature welding and jamming problem caused by impeller movement in traditional unprotected structures. This significantly reduces the probability of submersible pump failure and ensures long-term stable fluid delivery.

Description

Technical Field

[0001] This utility model relates to the field of submersible pump technology, specifically a structure for preventing axial movement and jamming in a horizontally installed submersible multistage pump. Background Technology

[0002] Submersible pumps, as underwater conveying devices integrating the pump body and motor, are widely used in applications such as seabed tunnels or where deep excavation of sump pits is inconvenient. Depending on the installation method, submersible pumps can be divided into vertical and horizontal installations. Horizontal installations, with their advantages of strong adaptability to installation space, convenient pipeline connection, and easy maintenance, are widely used in confined spaces, long-distance pipeline transport, and specific working conditions. In horizontal installation, the submersible pump body is arranged in a nearly horizontal position, fixed to the foundation by a bracket, and the pump shaft is aligned with the pipeline axis, achieving horizontal fluid transport.

[0003] The core requirement for horizontal installation of submersible pumps is to ensure the stability and reliability of equipment operation. On the one hand, the horizontal arrangement results in a significant difference in the stress state of the pump body compared to vertical installation. The pump shaft needs to bear multi-directional loads such as its own weight, fluid pressure, and motor torque. This places higher demands on the support strength and coaxiality accuracy of the installation structure. If the coaxiality deviation is too large, it will cause radial runout of the pump shaft during operation, aggravate bearing wear, and affect the service life of the equipment. On the other hand, in horizontal installation scenarios, submersible pumps are often connected to long pipeline systems. The thermal expansion and contraction of the pipeline or fluid impact will generate axial forces on the pump body. The installation structure needs to effectively buffer and constrain these external forces to ensure the stability of the connection between the pump body and the pipeline.

[0004] Existing submersible pumps have the following problems after long-term use: Without a protective wear-resistant mechanism, the impeller rotates at high speed during operation. When the impeller moves axially, the high temperature causes the components to weld and jam, making the submersible pump unable to operate stably. This can lead to the motor jamming or even burning out, reducing the service life of the submersible pump.

[0005] Therefore, we propose a horizontal installation structure for submersible pumps to prevent axial movement and jamming, in order to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a horizontal installation structure for submersible multistage pumps to prevent axial movement and jamming, in order to solve the problem mentioned in the background art that current submersible pumps on the market do not have protective wear-resistant mechanisms, which causes the impeller to rotate at high speed during operation. When the impeller moves axially, the high temperature causes the components to weld and jam, resulting in the submersible pump being unable to operate stably and reducing its service life.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a horizontally mounted submersible multistage pump structure to prevent axial movement and jamming, comprising a pump casing assembly and an impeller assembly. An impeller shaft is provided inside the pump casing assembly, and impeller assemblies are mounted on the impeller shaft. Multiple impeller assemblies are provided. A wear-resistant ring with a fluoroplastic wear-resistant alloy structure is installed on the inner wall of the pump casing assembly.

[0008] Preferably, an upper end cover is installed on the top of the pump housing assembly, and the upper end cover is connected to the pump housing assembly by a first fastening bolt, and a plurality of first fastening bolts are provided.

[0009] With the above structural design, multiple first fastening bolts are evenly distributed to ensure a tight connection between the upper end cover and the pump casing assembly, preventing the end cover from loosening due to pump body vibration during horizontal installation, and maintaining the operational stability of the impeller shaft and impeller assembly inside the casing.

[0010] Preferably, the pump housing assemblies are connected to each other by a second fastening bolt, and multiple second fastening bolts are provided.

[0011] By adopting the above structural design, the pump casing assemblies are connected into a whole by multiple second fastening bolts to ensure the coaxiality and sealing of the casing splice. In the horizontal installation scenario, the stable connection of multiple casing sections can avoid the casing misalignment caused by pipeline pressure or fluid impact, thereby preventing the impeller shaft and casing coaxiality deviation from aggravated, reducing the probability of axial movement of the impeller assembly, and ensuring the overall stability of the submersible pump operation.

[0012] Preferably, the wear-resistant ring of the fluoroplastic wear-resistant alloy structure is designed in a ring shape, and the wear-resistant ring is sleeved on the inner ring of the pump housing assembly.

[0013] With the above structural design, when the impeller assembly moves axially, the wear ring can directly block the contact between the impeller assembly and the inner wall of the pump casing assembly; the fluoroplastic wear-resistant alloy material itself has excellent wear resistance and high temperature resistance, which can reduce heat generation during friction and avoid high temperature welding jamming. At the same time, the ring structure ensures that there are no dead angles in the protection and improves the anti-jamming effect.

[0014] Preferably, the wear-resistant ring is tightly fitted to the pump housing assembly, and the inner wall of the pump housing assembly has an annular groove in which the wear-resistant ring is fixed.

[0015] The above structural design ensures that the wear ring will not be displaced due to vibration or fluid impact during the operation of the submersible pump, and will always maintain its relative position with the impeller assembly, avoiding protection failure due to wear ring displacement; the tank structure further limits the wear ring to prevent its axial movement, ensuring that the wear ring continuously provides stable protection for the impeller assembly.

[0016] Preferably, the wear-resistant ring is located in the inner ring of the pump housing, and the surface of the wear-resistant ring is provided with a wear-resistant coating.

[0017] The above structural design can simultaneously protect both the pump casing and the impeller assembly, reducing friction between them and the outer casing due to axial movement. The wear-resistant coating on the surface of the wear ring further enhances its wear resistance and high-temperature resistance, extending the service life of the wear ring. At the same time, it reduces the coefficient of friction, reducing resistance and heat generation during impeller assembly movement, providing a double-strength anti-jamming effect and ensuring long-term stable operation of the submersible pump.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the submersible pump has a horizontal installation structure to prevent axial movement and jamming. Highly effective prevention of axial movement and jamming, ensuring stable operation of submersible pumps. By installing a wear-resistant ring made of fluoroplastic wear-resistant alloy on the inner wall of the pump casing assembly, and with the wear-resistant ring being annularly fitted onto the inner ring of the pump casing and located at the contact surface between the impeller and the pump casing, the axial movement of the impeller assembly caused by the force of horizontal installation can be directly prevented from directly contacting the inner wall of the casing. The fluoroplastic wear-resistant alloy material is resistant to high temperature and low friction. Combined with the surface wear-resistant coating, it can reduce the generation of frictional heat and avoid the problem of high-temperature welding jamming caused by impeller movement in traditional unprotected structures. This significantly reduces the probability of submersible pump failure and ensures long-term stable fluid delivery. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 This is a schematic diagram of the impeller assembly structure of this utility model; Figure 3 This is a schematic diagram of the position and structure of the wear-resistant ring of this utility model.

[0020] In the diagram: 1. Pump casing assembly; 2. Upper end cover; 3. First fastening bolt; 4. Second fastening bolt; 5. Impeller shaft; 6. Impeller assembly; 7. Wear ring. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-3This utility model provides a technical solution: a horizontal installation structure for a submersible multistage pump to prevent axial movement and jamming, including a pump casing assembly 1, an upper end cover 2, first fastening bolts 3, second fastening bolts 4, an impeller shaft 5, an impeller assembly 6, and a wear-resistant ring 7. The pump casing assembly 1 contains an impeller shaft 5, and multiple impeller assemblies 6 are mounted on the impeller shaft 5. The upper end cover 2 is installed on top of the pump casing assembly 1, and the upper end cover 2 is connected to the pump casing assembly 1 by multiple first fastening bolts 3. These first fastening bolts 3 are evenly distributed to ensure a tight connection between the upper end cover 2 and the pump casing assembly 1, preventing pump vibration during horizontal installation. This causes the end cover to loosen. To maintain the operational stability of the impeller shaft 5 and impeller assembly 6 inside the casing, the pump casing assemblies 1 are connected by second fastening bolts 4, and multiple second fastening bolts 4 are provided. These multiple second fastening bolts 4 connect the various sections of the pump casing assembly 1 into a whole, ensuring the coaxiality and sealing of the casing joints. In horizontal installation scenarios, the stable connection of multiple casing sections can prevent misalignment of the casing due to pipeline pressure or fluid impact, thereby preventing the coaxiality deviation between the impeller shaft 5 and the casing from worsening, reducing the probability of axial movement of the impeller assembly 6, and ensuring the overall operational stability of the submersible pump. The inner wall of the pump casing assembly 1 is equipped with a wear-resistant ring 7 with a fluoroplastic wear-resistant alloy structure. The wear-resistant ring 7 of the submersible pump assembly 1 has a ring-shaped structure and is fitted around the impeller assembly 6. When the impeller assembly 6 moves axially, the wear-resistant ring 7 can directly prevent the impeller assembly 6 from contacting the inner wall of the pump housing assembly 1. The fluoroplastic wear-resistant alloy material itself has excellent wear resistance and high temperature resistance, which can reduce heat generation during friction and prevent high-temperature welding jamming. At the same time, the ring structure ensures no dead angles in protection and improves the anti-jamming effect. The wear-resistant ring 7 is tightly connected to the pump housing assembly 1. The inner wall of the pump housing assembly 1 has a groove, and the wear-resistant ring 7 is fixed in the groove to ensure that the wear-resistant ring 7 will not be displaced due to vibration or fluid impact during the operation of the submersible pump, and will always remain in contact with the impeller assembly 6. The relative position of the wear ring 7 is carefully controlled to prevent protection failure due to misalignment. The groove structure further limits the wear ring 7 to prevent axial movement and ensure that the wear ring 7 continuously provides stable protection for the impeller assembly 6. The wear ring 7 is located on the periphery of the impeller shaft 5. The surface of the wear ring 7 is coated with a wear-resistant coating, which can simultaneously protect both the impeller shaft 5 and the impeller assembly 6, reducing friction between the two and the outer casing due to axial movement. The wear-resistant coating on the surface of the wear ring 7 further enhances its wear resistance and high-temperature resistance, extending the service life of the wear ring 7. At the same time, it reduces the coefficient of friction, reducing the resistance and heat generation when the impeller assembly 6 moves, thus doubly strengthening the anti-jamming effect and ensuring the long-term stable operation of the submersible pump.

[0023] Working principle: When using this submersible pump in a horizontal installation to prevent axial movement and jamming in a submarine tunnel or mine, firstly, the wear-resistant ring 7 of the fluoroplastic wear-resistant alloy structure is fixed in the groove preset on the inner wall of the pump casing assembly 1 by a tight fit, ensuring that the wear-resistant ring 7 is ring-fitted around the impeller assembly 6 and located outside the impeller shaft 5, and its surface wear-resistant coating can enhance the protective effect; then, the upper end cover 2 is placed on top of the pump casing assembly 1 and tightened evenly with multiple first fastening bolts 3 to achieve shell sealing and prevent the end cover from loosening.

[0024] When the submersible pump is running, the impeller shaft 5 drives the impeller assembly 6 to rotate at high speed to transport fluid. If the impeller assembly 6 experiences axial movement due to the force of its horizontal installation, the wear-resistant ring 7 on the inner wall of the pump casing assembly 1 will directly prevent the impeller assembly 6 from contacting the inner wall of the casing. The high-temperature resistance and low friction characteristics of the fluoroplastic wear-resistant alloy material, combined with the surface wear-resistant coating, reduce the generation of frictional heat, prevent high-temperature welding and jamming of components, and ensure the long-term stable operation of the submersible pump, thereby completing a series of tasks. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0025] Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A structure for preventing axial movement and jamming of a horizontally mounted submersible multistage pump, comprising a pump casing assembly (1) and an impeller assembly (6), characterized in that: The pump housing assembly (1) is provided with an impeller shaft (5) inside, and an impeller assembly (6) is installed on the impeller shaft (5). There are multiple impeller assemblies (6), and a wear-resistant ring (7) with a fluoroplastic wear-resistant alloy structure is installed on the inner wall of the pump housing assembly (1).

2. The submersible multistage pump horizontal installation anti-axial movement and jamming structure according to claim 1, characterized in that: The pump housing assembly (1) is equipped with an upper end cover (2), and the upper end cover (2) is connected to the pump housing assembly (1) by a first fastening bolt (3), and there are multiple first fastening bolts (3).

3. The submersible multistage pump horizontal installation anti-axial movement and jamming structure according to claim 1, characterized in that: The pump housing assemblies (1) are connected to each other by second fastening bolts (4), and multiple second fastening bolts (4) are provided.

4. The submersible multistage pump horizontal installation anti-axial movement and jamming structure according to claim 1, characterized in that: The wear-resistant ring (7) of the fluoroplastic wear-resistant alloy structure is designed in a ring structure and is sleeved on the inner ring of the pump housing assembly (1).

5. The submersible multistage pump horizontal installation anti-axial movement and jamming structure according to claim 4, characterized in that: The wear-resistant ring (7) is tightly connected to the pump housing assembly (1), and the inner wall of the pump housing assembly (1) is provided with an annular groove, in which the wear-resistant ring (7) is fixed.

6. The submersible multistage pump horizontal installation anti-axial movement and jamming structure according to claim 1, characterized in that: The wear-resistant ring (7) is located around the impeller shaft (5), and the surface of the wear-resistant ring (7) is provided with a wear-resistant coating.

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