Submersible electric pump suitable for hot water medium

Abstract

The utility model belongs to water pump technical field especially relates to a submersible electric pump suitable for hot water medium, including casing, external casing, controller and sensor component, rotor shaft, stator component and impeller component are installed in casing, non -temperature -resistant electronic component is installed in external casing, and through first cable line and stator component electricity is connected, the controller is in the external casing outside, and non -temperature -resistant electronic component in the shell is connected through second cable line, sensor component is in casing, and through first, second cable line connects the controller, wherein first cable line is high temperature resistant cable line, and stator component is high temperature resistant stator component, this structure makes non -temperature -resistant electronic component not immerse in hot water, avoids its damage in 40 DEG C to 100 DEG C environment, and high temperature resistant cable line guarantees electric energy and electric signal transmission, prevents submersible electric pump failure, prolongs the life.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology, and in particular relates to a submersible electric pump suitable for hot water media. Background Technology

[0002] A submersible pump is a water pump that is completely submerged in a liquid medium. It is driven by an electric motor to rotate the impeller, thereby realizing underwater pumping operations. It is widely used in agriculture, industry, construction, environmental protection and other fields.

[0003] Conventional submersible pumps are only suitable for media temperatures ≤40℃ according to standard requirements. However, there are needs for transporting high-temperature media (usually exceeding 40℃, or even reaching 100℃) in industrial / civilian fields (such as geothermal utilization, high-temperature wastewater discharge, etc.). Conventional submersible pumps are prone to failure due to insufficient temperature resistance of components and uncontrolled overheating. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a submersible pump suitable for hot water media, thereby improving the temperature resistance of the submersible pump by externalizing the core components that have insufficient temperature resistance.

[0005] In view of this, the present invention provides a submersible electric pump suitable for hot water media, comprising:

[0006] The casing contains the rotor shaft, stator assembly, and impeller assembly.

[0007] The outer casing houses non-temperature-resistant electronic components, which are electrically connected to the stator assembly via a first cable.

[0008] The controller is installed on the outside of the outer housing and connected to the non-temperature-resistant electronic components inside the outer housing via a second cable;

[0009] The sensor assembly is installed inside the housing and is electrically connected to the controller via a first cable and a second cable.

[0010] The first cable is a high-temperature resistant cable, and the stator assembly is a high-temperature resistant stator assembly.

[0011] In the above technical solution, further:

[0012] The housing has a wiring cavity at the end away from the impeller assembly, and a mounting base for the first cable to pass through is fixedly installed on the surface of the housing located in the wiring cavity.

[0013] In the above technical solution, further:

[0014] The housing contains an upper bearing and a lower bearing at both ends of the rotor shaft, and both the upper and lower bearings are high-temperature resistant bearings.

[0015] In the above technical solution, further:

[0016] The housing has a drive cavity for mounting the stator assembly and the rotor shaft, and one end of the rotor shaft extends out of the drive cavity to connect to the impeller assembly. A pump body located on the periphery of the impeller assembly is connected to the side of the housing near the impeller assembly.

[0017] The pump body has an inlet on one axial side and an outlet on the side.

[0018] In the above technical solution, further:

[0019] A connecting component is provided between the pump body and the housing, and a flow guide cavity is formed between the connecting component and the pump body, and an oil cavity is formed between the connecting component and the housing;

[0020] The oil cavity is filled with lubricating oil, and a first mechanical seal is provided between the oil cavity and the drive cavity, and a second mechanical seal is provided between the oil cavity and the guide cavity.

[0021] In the above technical solution, further:

[0022] An oil injection hole is provided on the side of the oil cavity, and a plug is connected to the oil injection hole.

[0023] In the above technical solution, further:

[0024] The pump body is provided with a support base at one end of the water inlet, and the support base is provided with multiple water passage holes;

[0025] The pump body is equipped with a pipe joint on one side of the outlet.

[0026] The beneficial effects of this utility model are as follows:

[0027] 1. By setting up an external housing and installing non-temperature-resistant electronic components inside the external housing, these electronic components are prevented from being submerged in hot water along with the submersible pump, and are avoided from being used in a hot water environment of 40℃-100℃ for a long time, so as to avoid damage and prevent the submersible pump from failing.

[0028] 2. By replacing traditional ordinary cables, bearings, and stator assemblies with high-temperature resistant cables, high-temperature resistant stator assemblies, and high-temperature resistant bearings, the temperature resistance of components that must be installed on the submersible pump is improved, thereby improving the effectiveness of the submersible pump, preventing submersible pump failure, and extending its service life.

[0029] 3. By installing a connecting component between the pump body and the casing, an oil chamber is formed between the casing and the pump body, thereby achieving cooling and lubrication effects, improving the operating environment of the mechanical seal, avoiding damage to the stator and rotor, and extending service life. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is a cross-sectional view of the present invention;

[0032] Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle;

[0033] The markings in the diagram represent: 1. Housing; 2. Rotor shaft; 3. Stator assembly; 4. Impeller assembly; 5. External housing; 6. Non-temperature resistant electronic components; 7. First cable; 8. Controller; 9. Second cable; 10. Sensor assembly; 11. Wiring chamber; 12. Mounting base; 14. Upper bearing; 15. Lower bearing; 16. Drive chamber; 17. Pump body; 18. Inlet; 19. Outlet; 20. Connector; 21. Flow guide chamber; 22. Oil chamber; 23. First mechanical seal; 24. Second mechanical seal; 25. Oil injection hole; 26. Plug; 27. Support base; 28. Water passage hole; 29. ​​Pipe joint. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0035] Example 1:

[0036] This embodiment provides a submersible electric pump suitable for hot water media, comprising:

[0037] The casing 1 contains a rotor shaft 2, a stator assembly 3, and an impeller assembly 4.

[0038] The outer casing 5 houses non-temperature-resistant electronic components 6, which are electrically connected to the stator assembly 3 via the first cable 7.

[0039] The controller 8 is installed on the outside of the outer housing 5 and is connected to the non-temperature-resistant electronic component 6 inside the outer housing 5 via the second cable 9;

[0040] The sensor assembly 10 is installed inside the housing 1 and is electrically connected to the controller 8 via a first cable 7 and a second cable 9.

[0041] Among them, the first cable 7 is a high-temperature resistant cable, the stator assembly 3 is a high-temperature resistant stator assembly, and the specific structure and materials of the high-temperature resistant cable and the high-temperature resistant stator assembly are existing technologies, which can be obtained from traditional high-temperature resistant cables and high-temperature resistant stator assemblies, and will not be described in detail here;

[0042] Meanwhile, the non-temperature-resistant electronic components 6 may include starting capacitors, contactors, autotransformers, thermal relays, and circuit boards and their basic components (capacitors, resistors, transistors, etc.). In conventional submersible pumps, electronic components that are not necessarily located near the main body of the submersible pump are placed inside the outer housing 5. The sensor assembly 10 includes, but is not limited to, temperature sensors, leakage sensors, liquid level sensors, and pressure sensors, as well as other sensors found in conventional submersible pumps. All of these are high-temperature resistant and are existing mature technologies, which are conventional technology choices and will not be elaborated here.

[0043] As can be seen from this embodiment, by setting an external housing 5 and installing non-temperature-resistant electronic components 6 inside the external housing 5, these electronic components are prevented from being submerged in hot water medium along with the submersible pump, and are prevented from being used in a hot water environment of 40℃-100℃ for a long time, thus avoiding damage and preventing failure of the submersible pump.

[0044] Furthermore, the first cable 7 that electrically connects the outer housing 5 to the electronic components inside the housing 1, such as the stator assembly 3 and the sensor assembly 10, is a high-temperature resistant cable. This avoids the poor temperature resistance of ordinary cables, which could affect the transmission of electrical energy and signals, leading to the failure of the submersible pump and ensuring its service life.

[0045] Example 2:

[0046] This embodiment provides a submersible electric pump suitable for hot water media, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0047] The housing 1 has a wiring cavity 11 inside at the end away from the impeller assembly 4, and a mounting base 12 for the first cable 7 to pass through is fixedly provided on the surface of the housing 1 located in the wiring cavity 11.

[0048] The mounting base 12 and the housing 1 are connected by a sealed connection, specifically by bolt fastening and a sealing gasket.

[0049] As can be seen from this embodiment, by setting the mounting base 12, the connection strength and stability between the first cable 7 and the electronic components inside the housing 1 are improved, while hot water medium is prevented from entering the wiring cavity 11, thus preventing the submersible pump from failing or being damaged and extending its service life.

[0050] Example 3:

[0051] This embodiment provides a submersible electric pump suitable for hot water media, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0052] The housing 1 is provided with an upper bearing 14 and a lower bearing 15 at the two axial ends of the rotor shaft 2, and both the upper bearing 14 and the lower bearing 15 are high temperature resistant bearings.

[0053] The specific structure of the high-temperature bearing and the selection of materials for each part are existing technologies that can be learned from traditional high-temperature bearings, and will not be elaborated here.

[0054] As can be seen from this embodiment, by setting the upper bearing 14 and the lower bearing 15, the structural stability of the rotor shaft 2 during rotation is improved. Furthermore, by selecting high-temperature resistant bearings for the upper bearing 14 and the lower bearing 15, the effectiveness and performance when used in high-temperature environments such as hot water media are improved, avoiding premature failure of the submersible pump due to poor bearing temperature resistance, and effectively extending its service life.

[0055] Example 4:

[0056] This embodiment provides a submersible electric pump suitable for hot water media, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0057] The housing 1 has a drive cavity 16 for installing the stator assembly 3 and the rotor shaft 2. One end of the rotor shaft 2 extends out of the drive cavity 16 to connect to the impeller assembly 4. A pump body 17 located on the periphery of the impeller assembly 4 is connected to the side of the housing 1 near the impeller assembly 4.

[0058] The pump body 17 has an inlet 18 on one axial side and an outlet 19 on the side.

[0059] Meanwhile, the specific structure of the impeller assembly 4 is existing technology and can be obtained from the traditional impeller assembly 4, so it will not be described in detail here.

[0060] As can be seen from this embodiment, the above structure enables the stator assembly 3 to drive the rotor shaft 2 to rotate after being powered on, which in turn drives the impeller assembly 4 to rotate, thereby drawing water in from the inlet 18 and pumping it out from the outlet 19, ensuring the pumping effect of the submersible pump.

[0061] Example 5:

[0062] This embodiment provides a submersible electric pump suitable for hot water media, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0063] A connector 20 is provided between the pump body 17 and the housing 1, and a flow guide cavity 21 is formed between the connector 20 and the pump body 17, and an oil cavity 22 is formed between the connector 20 and the housing 1.

[0064] The oil cavity 22 is filled with lubricating oil, and a first mechanical seal 23 is provided between the oil cavity 22 and the drive cavity 16, and a second mechanical seal 24 is provided between the oil cavity 22 and the guide cavity 21.

[0065] As can be seen from this embodiment, by setting a connecting piece 20 between the pump body 17 and the housing 1, an oil chamber 22 is formed between the housing 1 and the pump body 17, thereby achieving cooling and lubrication effects, improving the operating environment of the mechanical seal, avoiding damage to the stator and rotor, and extending the service life.

[0066] Furthermore, the first mechanical seal 23 can prevent lubricating oil from entering the drive cavity 16, while the second mechanical seal 24 can prevent hot water medium from entering the oil cavity 22. The lubricating oil can improve the lubrication and wear resistance of the friction pair in the first mechanical seal 23, and at the same time form a certain oil seal effect to ensure sealing performance.

[0067] Example 6:

[0068] This embodiment provides a submersible electric pump suitable for hot water media, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0069] The oil cavity 22 has an oil injection hole 25 on its side, and a plug 26 is connected to the oil injection hole 25.

[0070] As can be seen from this embodiment, the opening of the oil injection hole 25 facilitates the injection of oil into the oil cavity 22, while the plug 26 can improve the sealing performance of the oil injection hole 25.

[0071] Furthermore, it is possible to determine whether the second mechanical seal 24 has failed by draining the lubricating oil from the oil chamber 22, which allows hot water medium to enter the oil chamber 22, thus providing a good inspection effect for the second mechanical seal 24.

[0072] Example 7:

[0073] This embodiment provides a submersible electric pump suitable for hot water media, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0074] The pump body 17 is provided with a support base 27 at one end of the inlet 18, and the support base 27 is provided with a plurality of water passage holes 28;

[0075] The pump body 17 is equipped with a pipe joint 29 on one side of the outlet 19;

[0076] The support base 27 is fastened to the pump body 17 with bolts, while the pipe joint 29 is integrated with the pump body 17.

[0077] As can be seen from this embodiment, the support base 27 and the multiple water passage holes 28 opened on the support base 27 can support the submersible electric pump and raise the water inlet 18, thereby facilitating the water intake of the water inlet 18 and avoiding the water inlet 18 touching the ground, which would affect the entry of the hot water medium into the guide cavity 21.

[0078] The pipe connector 29 is designed to facilitate the connection of pipe fittings at the outlet 19, thereby improving the convenience of connecting pipe fittings.

[0079] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A submersible electric pump suitable for hot water media, characterized in that, include: The casing (1) contains a rotor shaft (2), a stator assembly (3), and an impeller assembly (4). The outer casing (5) houses non-temperature-resistant electronic components (6) and is electrically connected to the stator assembly (3) via a first cable (7). The controller (8) is installed on the outside of the outer housing (5) and connected to the non-temperature resistant electronic components (6) inside the outer housing (5) via a second cable (9). The sensor assembly (10) is installed inside the housing (1) and is electrically connected to the controller (8) via a first cable (7) and a second cable (9). Among them, the first cable (7) is a high temperature resistant cable, and the stator assembly (3) is a high temperature resistant stator assembly.

2. The submersible electric pump suitable for hot water medium according to claim 1, characterized in that: The housing (1) has a wiring cavity (11) inside at the end away from the impeller assembly (4), and a mounting seat (12) for the first cable (7) to pass through is fixedly provided on the surface of the housing (1) located in the wiring cavity (11).

3. The submersible electric pump suitable for hot water medium according to claim 1, characterized in that: The housing (1) is provided with an upper bearing (14) and a lower bearing (15) at the two axial ends of the rotor shaft (2), and both the upper bearing (14) and the lower bearing (15) are high temperature resistant bearings.

4. The submersible electric pump suitable for hot water medium according to claim 1, characterized in that: The housing (1) has a drive chamber (16) for installing the stator assembly (3) and the rotor shaft (2), and one end of the rotor shaft (2) extends out of the drive chamber (16) to connect to the impeller assembly (4), and a pump body (17) located on the periphery of the impeller assembly (4) is connected to the side of the housing (1) near the impeller assembly (4). The pump body (17) has an inlet (18) on one axial side and an outlet (19) on the side.

5. The submersible electric pump suitable for hot water medium according to claim 4, characterized in that: A connector (20) is provided between the pump body (17) and the housing (1), and a flow guide cavity (21) is formed between the connector (20) and the pump body (17), and an oil cavity (22) is formed between the connector (20) and the housing (1). The oil cavity (22) is filled with lubricating oil, and a first mechanical seal (23) is provided between the oil cavity (22) and the drive cavity (16), and a second mechanical seal (24) is provided between the oil cavity (22) and the guide cavity (21).

6. The submersible electric pump suitable for hot water medium according to claim 5, characterized in that: The oil cavity (22) has an oil injection hole (25) on its side, and a plug (26) is connected to the oil injection hole (25).

7. The submersible electric pump suitable for hot water medium according to claim 4, characterized in that: The pump body (17) is provided with a support base (27) at one end of the inlet (18), and the support base (27) is provided with multiple water passage holes (28). The pump body (17) is equipped with a pipe joint (29) on one side of the outlet (19).

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