Impeller built-in type full tubular pump sealing device

Abstract

The invention relates to an impeller built-in type full tubular pump sealing device, a motor of a full tubular pump is a wet winding motor filled with water, and an impeller is arranged in a motor rotor; a wire seal and a wiring cavity are arranged on the full tubular pump, the wiring cavity is connected with the wire seal, the wire seal plays a role in sealing between the interior of the motor shell and the wiring cavity, and a waterproof insulated wire of the motor penetrates through a wire hole of the wire seal from the interior of the motor shell and enters the wiring cavity; the wire seal is mainly composed of a wire hole, a pressing ring and a wire seal body. At least one end of the wire seal body is provided with a sealing ring. At least three wire holes are formed in the wire sealing main body; a power supply cable penetrates through the cable seal from the outside to enter the wiring cavity and is connected with a conductor of the waterproof insulated wire. In a motor cavity filled with water, wiring and sealing of a waterproof insulated wire and a cable are omitted, and hidden dangers are eliminated. And the waterproof insulated wire adopts three-stage sealing, so that the sealing reliability is enhanced. In the running and using process, if a medium enters a connecting wire from leakage, the leakage sensor gives an alarm in time, the water pump is overhauled, the water drainage condition of the water pump can be checked only by opening the connecting wire gland on the connecting box, and safety accidents caused by long-term soaking of a binding joint are prevented.

Description

Technical Field

[0001] This invention relates to a transverse submersible pump, and particularly to a sealing device for a 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, with the rotor acting as the impeller's outer shell. 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 waterproof insulated wires that are resistant to water immersion, avoiding insulation problems caused by poor sealing, and ensuring high reliability. In contrast, traditional impeller-embedded full-flow pumps use cables that pass through the motor housing and are sealed to waterproof insulated wires, then the connection is wrapped with waterproof electrical tape. When the pump head is high, leading to increased pressure inside the motor cavity, or when the electrical tape ages, water seepage can damage the insulation, causing equipment damage, electrical faults, or even safety accidents. Summary of the Invention

[0003] To solve the above problems, a safe and reliable sealing device is provided, which is installed on the motor housing of an impeller-embedded full-flow pump. The technical solution adopted to achieve the above objective is:

[0004] An impeller-embedded sealing device for a full-flow pump is provided. The motor of the full-flow pump (1) is a water-filled wet-winding motor, and the impeller (2) is located inside the motor rotor (3). The full-flow pump (1) is provided with a wire seal (12) and a wiring cavity (10). The wiring cavity (10) is connected to the wire seal (12). The wire seal (12) acts as a seal between the inside of the motor housing (5) and the wiring cavity (10). The waterproof insulated wire (6) of the motor passes through the wire hole (12) of the wire seal (12) from inside the motor housing (5). -1), enters the wiring cavity (10); the wire seal (12) is mainly composed of wire hole (12-1), pressure ring (12-2), and wire seal body (12-3). The wire seal body (12-3) has a sealing ring at least at one end; there are at least 3 wire holes (12-1) in the wire seal body (12-3); the power supply cable (17) passes through the cable seal (7) from the outside and enters the wiring cavity (10). The power supply cable (17) is connected to the conductor (6-2) of the waterproof insulated wire (6).

[0005] Furthermore, the wire sealing body (12-3) is provided with a first sealing ring (12-4) on the side near the motor. The internal cavity of the first sealing ring (12-4) is connected to the wire hole (12-1). The waterproof insulated wire (6) enters the wiring cavity (10) from the inside of the motor through the first sealing ring (12-4) and the wire hole (12-1). Sealant (14) is poured into the internal cavity of the first sealing ring (12-4).

[0006] Furthermore, a metal skeleton (15) is provided inside the first sealing ring (12-4), and the metal skeleton (15) extends into the wire sealing body (12-3) to prevent the first sealing ring (12-4) from deforming under force.

[0007] Furthermore, the wiring chamber (8) is connected to the outside of the motor housing (5), and the wiring cover (9) is connected to the wiring chamber (8). A sealing ring is provided at the mating surface, and the motor housing (5), the wiring chamber (8) and the wiring cover (9) form a sealed wiring cavity (10).

[0008] Furthermore, a second sealing ring (12-5) is provided on the side of the wire sealing body (12-3) connected to the wiring cavity (10). The waterproof insulated wire (6) passes through the wire hole (12-1) and the inner hole of the second sealing ring (12-5) and enters the wiring cavity (10). Sealant (13) is poured into the inner cavity of the second sealing ring (12-5).

[0009] Furthermore, a metal skeleton (16) is provided inside the second sealing ring (12-5), and the metal skeleton (15) extends into the wire sealing body (12-3) to prevent the second sealing ring (12-5) from being deformed by force.

[0010] Furthermore, the waterproof insulated wire (6) passes sequentially through the first sealing ring (12-4), the wire hole (12-1), and the second sealing ring (12-5) of the wire seal (12) from the motor cavity. Sealant (14) is poured into the inner cavity of the first sealing ring (12-4), and sealant (13) is poured into the inner cavity of the second sealing ring (12-5) to enhance the sealing effect of the waterproof insulated wire (6).

[0011] Furthermore, in the wiring cavity (10), the waterproof insulated wire (6) is connected to the cable (17), and the cable is wrapped and sealed with waterproof electrical tape to prevent water from entering the wiring cavity (10) and causing safety failure.

[0012] Furthermore, a leakage sensor is installed in the wiring cavity (10) to protect against leakage.

[0013] Furthermore, the waterproof insulated wire (6) passes through the wire hole (12-1) and enters the inner cavity of the second sealing ring (12-5). A section of the insulating sleeve (6-1) in this inner cavity is removed, and the conductor (6-2) along with the remaining insulating sleeves at both ends is filled with sealant (13). This prevents water from entering the wiring cavity (10) through the gap between the insulating sleeve (6-1) and the wire body (6-2) after the insulating sleeve (6-1) inside the motor is damaged. Figure 2 As shown.

[0014] Furthermore, the sealants (13) and (14) are epoxy resin potting compound, silicone potting compound, polyurethane potting compound, or other condensation-resistant sealing materials.

[0015] Furthermore, the wire seal (12) is provided with two sealing rings at its two ends. The wire seal (12) is composed of a wire hole (12-1), a pressure ring (12-2), a wire seal body (12-3), a first sealing ring (12-4), and a second sealing ring (12-5). The wire seal body (12-3) and the pressure ring (12-2) are made of elastic material. The wire seal body (12-3) and the pressure ring (12-2) are either an integral structure or a separate structure.

[0016] The advantages of this invention are as follows: In a water-filled motor cavity, the connection and sealing of the waterproof insulated wires and cables are eliminated, thus removing potential hazards; the waterproof insulated wires employ a three-stage sealing system, enhancing sealing reliability. During operation, if the medium leaks into the wiring, the leakage sensor will promptly alarm, and the water pump can be inspected. Simply opening the wiring cover on the junction box is sufficient to check for water leakage, preventing safety accidents caused by prolonged immersion of the wrapped joints in water. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a sealed device for an impeller-embedded full-flow pump according to the present invention.

[0018] Figure 2 This is a partially enlarged view of a sealing device for an impeller-embedded full-flow pump according to the present invention.

[0019] Figure 3 This is a schematic diagram of the wire sealing structure in this invention.

[0020] Figure 4 This is a diagram of the main body of the wire seal in this invention.

[0021] Figure 5 This is a schematic diagram of the pressure ring for sealing the wire in this invention.

[0022] Figure 6 This is a schematic diagram of the wire sealing with a skeleton in this invention.

[0023] In the diagram: 1. Full-flow pump, 2. Impeller, 3. Motor rotor, 4. Motor stator, 5. Motor housing, 6. Waterproof insulated wire, 6-1 Insulating sleeve, 6-2. Conductor, 7. Cable seal, 8. Wiring chamber, 9. Wiring cover, 10. Wiring cavity, 11. Sealing gland, 12. Wire seal, 12-1. Wire hole, 12-2. Pressure ring, 12-3. Wire seal body, 12-4. First sealing ring, 12-5. Second sealing ring, 13. Sealant, 14. Sealant, 15. Metal skeleton, 16. Metal skeleton, 17. Power cable. Detailed Implementation

[0024] 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.

[0025] Figures 1-6 This invention relates to a sealing device for an impeller-embedded full-flow pump and a schematic diagram of its related structure. The motor of the full-flow pump (1) is a water-filled wet-winding motor, and the impeller (2) is located inside the motor rotor (3). The full-flow pump (1) is provided with a wire seal (12) and a wiring cavity (10). The wiring cavity (10) is connected to the wire seal (12). The wire seal (12) serves as a seal between the inside of the motor housing (5) and the wiring cavity (10). The waterproof insulated wire (6) of the motor passes through the wire seal (12) from inside the motor housing (5). The wire hole (12-1) enters the wiring cavity (10); the wire seal (12) is mainly composed of the wire hole (12-1), the pressure ring (12-2), and the wire seal body (12-3). The wire seal body (12-3) has a sealing ring at least at one end; there are at least 3 wire holes (12-1) in the wire seal body (12-3); the power supply cable (17) passes through the cable seal (7) from the outside and enters the wiring cavity (10). The power supply cable (17) is connected to the conductor (6-2) of the waterproof insulated wire (6).

[0026] The wire sealing body (12-3) is provided with a first sealing ring (12-4) on the side near the motor. The internal cavity of the first sealing ring (12-4) is connected to the wire hole (12-1). The waterproof insulated wire (6) enters the wiring cavity (10) from the inside of the motor through the first sealing ring (12-4) and the wire hole (12-1). The internal cavity of the first sealing ring (12-4) is filled with sealant (14).

[0027] The first sealing ring (12-4) has a metal skeleton (15) inside, which extends into the wire sealing body (12-3).

[0028] The wiring chamber (8) is connected to the outside of the motor housing (5), and the wiring cover (9) is connected to the wiring chamber (8). A sealing ring is provided at the mating surface. The motor housing (5), the wiring chamber (8) and the wiring cover (9) form a sealed wiring cavity (10).

[0029] In the wiring cavity (10), after the waterproof insulated wire (6) is connected to the power supply cable (17), it is wrapped and sealed with waterproof insulating tape.

[0030] The wire sealing body (12-3) is provided with a second sealing ring (12-5) on the side connected to the wiring cavity (10). The waterproof insulated wire (6) passes through the wire hole (12-1) and the inner hole of the second sealing ring (12-5) and enters the wiring cavity (10). The inner cavity of the second sealing ring (12-5) is filled with sealant (13).

[0031] The second sealing ring (12-5) has a metal skeleton (16) inside, which extends into the wire sealing body (12-3).

[0032] The waterproof insulated wire (6) passes through the wire hole (12-1) and enters the inner cavity of the second sealing ring (12-5). A section of the insulating sleeve (6-1) in the inner cavity is removed, and the conductor (6-2) along with the insulating sleeves retained at both ends are filled with sealant (13). This prevents water from entering the wiring cavity (10) through the gap between the insulating sleeve (6-1) and the wire body (6-2) if the insulating sleeve (6-1) inside the motor is damaged.

[0033] The sealants (13) and (14) are epoxy resin potting compound, silicone potting compound, polyurethane potting compound, or other condensation-resistant sealing materials.

[0034] The conductor seal (12) is provided with two sealing rings at its two ends. The conductor seal (12) consists of a conductor hole (12-1), a pressure ring (12-2), a conductor seal body (12-3), a first sealing ring (12-4), and a second sealing ring (12-5). After the waterproof insulated conductor (6) passes through the conductor seal (12) from the motor cavity, sealant (14) is injected into the inner cavity of the first sealing ring (12-4) and sealant (13) is injected into the inner cavity of the second sealing ring (12-5) to enhance the sealing effect of the waterproof insulated conductor (6). The conductor seal body (12-3) and the pressure ring (12-2) are either an integral structure or separate structures. The conductor seal body (12-3) and the pressure ring (12-2) are made of elastic material.

[0035] The working principle is as follows:

[0036] 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 impeller (2) is installed in the inner cavity of the motor rotor (3) and rotates synchronously with the motor rotor (3).

[0037] The wet-winding full-flow pump (1) is equipped with a wire seal (12) and a wiring cavity (10). The impeller (2) is installed in the motor rotor (3). The motor stator (4) uses waterproof insulated wires (6). The waterproof insulated wires (6) pass through the wire seal (12) and enter the wiring cavity (10). The power supply cable (17) passes through the cable seal (7) from the outside and enters the wiring cavity (10), connecting to the conductor (6-2) of the waterproof insulated wires (6). The sealing cover (11) presses down on the pressure ring (12-2) to fix the wire seal (12) and enhance the sealing effect. The wiring chamber (8) is connected to the outside of the motor housing (5). The wiring cover (9) is connected to the wiring chamber (8). A sealing ring is set at the mating surface. The motor housing (5), the wiring chamber (8), and the wiring cover (9) form a sealed wiring cavity (10).

[0038] In the water-filled motor cavity, the connection and sealing of the waterproof insulated wire (6) and the power supply cable (17) are eliminated, thus removing potential hazards. The waterproof insulated wire (6) adopts a three-level seal, which enhances the reliability of the seal. During operation, if the medium leaks into the wiring chamber (8), the leakage sensor will alarm in time, and the water pump will be inspected. The water pump leakage can be checked simply by opening the wiring cover (9) on the wiring chamber (8), preventing the wrapped joint from being submerged in water for a long time and causing safety accidents.

[0039] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention. Clearly, those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the embodiments of the invention fall within the scope of the claims of the invention and their equivalents, the invention also intends to include these modifications and variations.

[0040] For example, placing the wiring cavity (10) inside the motor housing (5) is within the scope of this invention. Alternatively, placing the wiring cavity (10) on the cover plates at both ends of the motor housing (5) is also within the scope of this invention.

Claims

1. A sealing device for a fully axial-flow pump with an impeller built-in, characterized in that: The motor of the full-flow pump (1) is a water-filled wet-winding motor, and the impeller (2) is located inside the motor rotor (3). The full-flow pump (1) is equipped with a wire seal (12) and a wiring cavity (10). The wiring cavity (10) is connected to the wire seal (12). The wire seal (12) acts as a seal between the inside of the motor housing (5) and the wiring cavity (10). The waterproof insulated wire (6) of the motor passes through the wire hole (12-1) of the wire seal (12) from inside the motor housing (5) and enters the wiring cavity (10). In the wire cavity (10); the wire seal (12) is mainly composed of wire hole (12-1), pressure ring (12-2), and wire seal body (12-3). The wire seal body (12-3) has a sealing ring at least at one end; there are at least 3 wire holes (12-1) in the wire seal body (12-3); the power supply cable (17) passes through the cable seal (7) from the outside and enters the wiring cavity (10). The power supply cable (17) is connected to the conductor (6-2) of the waterproof insulated wire (6).

2. The impeller-embedded full-flow pump sealing device according to claim 1, characterized in that: The wire sealing body (12-3) is provided with a first sealing ring (12-4) on the side near the motor. The internal cavity of the first sealing ring (12-4) is connected to the wire hole (12-1). The waterproof insulated wire (6) enters the wiring cavity (10) from the inside of the motor through the first sealing ring (12-4) and the wire hole (12-1). The internal cavity of the first sealing ring (12-4) is filled with sealant (14).

3. The impeller-embedded full-flow pump sealing device according to claim 1, characterized in that: The first sealing ring (12-4) has a metal skeleton (15) inside, which extends into the wire sealing body (12-3).

4. The impeller-embedded full-flow pump sealing device according to claim 1, characterized in that: The wiring chamber (8) is connected to the outside of the motor housing (5), and the wiring cover (9) is connected to the wiring chamber (8). A sealing ring is provided at the mating surface. The motor housing (5), the wiring chamber (8) and the wiring cover (9) form a sealed wiring cavity (10).

5. The impeller-embedded full-flow pump sealing device according to claim 1, characterized in that: In the wiring cavity (10), after the waterproof insulated wire (6) is connected to the power supply cable (17), it is wrapped and sealed with waterproof insulating tape.

6. The impeller-embedded full-flow pump sealing device according to claim 1, characterized in that: The wire sealing body (12-3) is provided with a second sealing ring (12-5) on the side connected to the wiring cavity (10). The waterproof insulated wire (6) passes through the wire hole (12-1) and the inner hole of the second sealing ring (12-5) and enters the wiring cavity (10). The inner cavity of the second sealing ring (12-5) is filled with sealant (13).

7. The impeller-embedded full-flow pump sealing device according to claim 6, characterized in that: The second sealing ring (12-5) has a metal skeleton (16) inside, which extends into the wire sealing body (12-3).

8. The impeller-embedded full-flow pump sealing device according to claim 1, characterized in that: The waterproof insulated wire (6) passes through the wire hole (12-1) and enters the inner cavity of the second sealing ring (12-5). A section of the insulating sleeve (6-1) in the inner cavity is removed, and the conductor (6-2) together with the insulating sleeves retained at both ends are filled with sealant (13).

9. The impeller-embedded full-flow pump sealing device according to claim 1, characterized in that: The sealants (13) and (14) are epoxy resin potting compound, silicone potting compound, polyurethane potting compound, or other condensation-resistant sealing materials.

10. The impeller-embedded full-flow pump sealing device according to claim 1, characterized in that: The wire sealing body (12-3) and the pressure ring (12-2) are either an integral structure or separate structures; the wire sealing body (12-3) and the pressure ring (12-2) are made of elastic material.

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