An impeller built-in full cross flow pump

Abstract

The present application relates to a kind of impeller built-in full penetration flow pump, it mainly includes guide vane body, motor rotor, runner, motor casing, terminal box, horn pipe, the runner is arranged in the motor rotor of wet winding motor inside, stator lead cable enters the wiring cavity from the first seal of wet winding motor cavity, power cable enters the wiring cavity by the second seal being arranged in the outer periphery of wiring cavity, in wiring cavity, power cable is connected with stator lead cable;The first seal is arranged on motor casing.The terminal box gland is arranged on the terminal box, when power cable and stator lead cable are connected in wiring cavity, cover terminal box gland, the wiring cavity just forms a closed space.If medium leaks from the outlet of the motor casing of submersible motor to wiring cavity during the operation of water pump, just open the terminal box gland on the terminal box to check the water leakage of water pump, the sealing structure is easy to install, overhaul, can effectively reduce the labor and time cost of water pump during overhaul.

Description

Technical Field

[0001] This invention relates to a transverse submersible electric pump, and particularly to a fully transverse pump with an impeller built-in. Background Technology

[0002] The impeller-embedded full-flow pump is a compact, high-efficiency, and energy-saving water pump suitable for low-head, high-flow applications such as urban flood control and drainage, farmland irrigation and drainage. The pump impeller is installed inside the motor rotor cavity; the rotor acts as the impeller housing, transforming the ineffective parts of the motor into the working parts. Compared to traditional submersible axial flow pumps, the axial dimension is reduced by nearly half, weight is reduced, and metal consumption is decreased by approximately 40%. The wet stator structure eliminates the need for winding seals, using water-resistant insulated winding wires that are resistant to water immersion, avoiding insulation problems caused by poor sealing, and ensuring high reliability. Leakage at the wire and cable connections of the impeller-embedded full-flow pump is a problem that needs immediate attention, as it can lead to equipment damage, electrical failures, and even safety accidents. Summary of the Invention

[0003] To solve the above technical problems, a fully axial-flow pump with an internal impeller is provided, which has a simple sealing structure and is easy to install and maintain. The technical solution adopted to achieve the above objective is:

[0004] An impeller-embedded full-flow pump mainly includes a guide vane body, a motor rotor, a runner, a motor housing, a junction box, and a bell tube. The runner is installed inside the motor rotor of a wet-wound motor. The stator lead cable enters the junction box from the wet-wound motor cavity through a first seal, and the power supply cable enters the junction box through a second seal located on the outer periphery of the junction box. In the junction box, the power supply cable is connected to the stator lead cable. The first seal is located on the motor housing.

[0005] To further explain, a junction box cover is provided on the junction box. After the power supply cable and stator lead cable are connected in the junction box cavity, the junction box cover is closed, and the junction box cavity forms a sealed space.

[0006] To further explain, the junction box and the motor housing are either separate or integrated structures; a sealing element is provided at the connection between the junction box and the motor housing, and a sealing element is provided at the sealing point between the junction box and the junction box cover.

[0007] To further explain, the stator lead cable and the power supply cable inside the wiring cavity can be connected by a terminal block fixed on the junction box.

[0008] To further explain, the power supply cable can enter the wiring cavity through a seal located on the outer periphery of the wiring cavity or through a seal located on the outer periphery of the junction box cover.

[0009] To further explain, the tension of the second seal is adjusted by cable gland I; the tension of the first seal is adjusted by cable gland II.

[0010] The beneficial effects of this invention are as follows: If the medium leaks from the outlet of the submersible motor housing into the wiring cavity during the operation of the water pump, the water pump leakage can be checked simply by opening the junction box cover on the junction box. This sealing structure is easy to install and maintain, and can effectively reduce the labor and time costs in the maintenance process of the water pump. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a fully axial-flow pump with an impeller built-in according to the present invention.

[0012] Figure 2 This is a schematic diagram of a fully axial-flow pump with an impeller built-in and a terminal block structure according to the present invention.

[0013] In the diagram: 1. Guide vane, 2. Motor rotor, 3. Runner, 4. Wet winding motor cavity, 4-1. Motor housing, 5. Stator lead cable, 6. Bell tube, 7. Junction box, 7-1. Wiring cavity, 7-2. Seal, 8. First seal, 9. Power supply cable, 10. Second seal, 11. Cable gland I, 12. Cable gland II, 13. Junction box gland, 14. Terminal post. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0015] Figure 1 and Figure 2 This invention relates to a fully axial-flow pump with an impeller built-in and related structural schematic diagrams, mainly including a guide vane body (1), a motor rotor (2), a runner (3), a motor housing (4-1), a junction box (7), and a horn tube (6). The impeller (3) is located inside the motor rotor (2) of the wet-wound motor. The stator lead cable (5) enters the junction box (7-1) from the wet-wound motor cavity (4) through the first seal (8). The power supply cable (9) enters the junction box (7-1) through the second seal (10) located on the outer periphery of the junction box (7-1). In the junction box (7-1), the power supply cable (9) is connected to the stator lead cable (5). The first seal (8) is located on the motor housing (4-1).

[0016] A junction box cover (13) is provided on the junction box (7). When the power supply cable (9) and the stator lead cable (5) are connected in the junction cavity (7-1) and the junction box cover (13) is closed, the junction cavity (7-1) forms a sealed space.

[0017] The junction box (7) and the motor housing (4-1) are either separate or integrated structures; a sealing element (7-2) is provided at the connection between the junction box (7) and the motor housing (4-1), and a sealing element is provided at the connection between the junction box (7) and the junction box cover (13).

[0018] The stator lead cable (5) and the power supply cable (9) in the wiring cavity (7-1) can be connected by a terminal block (14).

[0019] The power supply cable (9) can enter the wiring cavity (7-1) through a seal set on the outer periphery of the wiring cavity (7-1) or through a seal set on the outer periphery of the junction box cover (13).

[0020] The tension of the second seal (10) is adjusted by the cable gland I (11); the tension of the first seal (8) is adjusted by the cable gland II (12).

[0021] The working principle is as follows:

[0022] The motor stator adopts a wet stator structure, and the winding is made of water-resistant insulating material and is directly immersed in water; the motor rotor (2) has a built-in impeller (3) and forms an integral part with the impeller (3); the horn tube (6) is located at the rear end of the motor stator and is used to guide the water flow out smoothly and reduce hydraulic loss; the impeller (3) is installed inside the motor rotor (2) of the wet winding motor and rotates synchronously with the motor rotor (2). The submersible motor housing (3) is provided with a fully sealed wiring cavity (7-1); the stator lead cable (5) enters the wiring cavity (7-1) from the wet winding motor cavity (4) through the first seal (8), and the power supply cable (9) enters the wiring cavity (7-1) through the second seal (10) set on the outer periphery of the wiring cavity (7-1). In the wiring cavity (7-1), the power supply cable (9) is connected to the stator lead cable (5); the first seal (8) is set on the motor housing (4-1); a junction box cover (13) is set on the junction box (7). When the power supply cable (9) and the stator lead cable (5) are connected in the wiring cavity (7-1), the junction box cover (13) is closed, and the wiring cavity (7-1) forms a sealed space.

[0023] The scope of protection of this invention is not limited to the above embodiments, but also includes other embodiments and variations within the scope of the inventive concept.

Claims

1. A fully axial-flow pump with an internal impeller, mainly comprising a guide vane body (1), a motor rotor (2), a runner (3), a motor housing (4-1), a junction box (7), a stator lead cable (5), and a bell tube (6), characterized in that: The wheel (3) is located inside the motor rotor (2) of the wet winding motor. The stator lead cable (5) enters the wiring cavity (7-1) from the wet winding motor cavity (4) through the first seal (8). The power supply cable (9) enters the wiring cavity (7-1) through the second seal (10) located on the outer periphery of the wiring cavity (7-1). In the wiring cavity (7-1), the power supply cable (9) is connected to the stator lead cable (5). The first seal (8) is located on the motor housing (4-1).

2. The impeller-embedded full-flow pump according to claim 1, characterized in that: A junction box cover (13) is provided on the junction box (7). When the power supply cable (9) and the stator lead cable (5) are connected in the junction cavity (7-1), the junction box cover (13) is closed, and the junction cavity (7-1) forms a sealed space.

3. The impeller-embedded full-flow pump according to claim 1, characterized in that: The junction box (7) and the motor housing (4-1) are either separate or integrated structures; a sealing element (7-2) is provided at the connection between the junction box (7) and the motor housing (4-1), and a sealing element is provided at the connection between the junction box (7) and the junction box cover (13).

4. The impeller-embedded full-flow pump according to claim 1, characterized in that: The stator lead cable (5) and the power supply cable (9) in the wiring cavity (7-1) can be connected by a terminal block (14).

5. The impeller-embedded full-flow pump according to claim 1, characterized in that: The power supply cable (9) enters the wiring cavity (7-1) through a seal located on the outer periphery of the wiring cavity (7-1) or through a seal located on the outer periphery of the junction box cover (13).

6. The impeller-embedded full-flow pump according to claim 1, characterized in that: The tension of the second seal (10) is adjusted by the cable gland I (11); the tension of the first seal (8) is adjusted by the cable gland II (12).

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