A coupling connection device for a submersible electric pump

Abstract

This application discloses a coupling connection device for a submersible pump, including a coupling bracket mounted on the connecting flange of the submersible pump, with its outer side configured as a first circumferential coupling slope; a coupling base with its inner side configured as a second circumferential coupling slope, the first circumferential coupling slope facing downwards and coupling and sealingly engaging with the second circumferential coupling slope; and a housing sealed and mounted on the upper surface of the coupling base and connected to a water supply pipeline. The coupling bracket and coupling base employ a conical contact seal, providing self-centering and self-adjusting functions, and facilitating installation. A sealing ring is provided between the coupling bracket and coupling base, providing a sealing effect and reducing the impact of unit vibration on the pipeline. A flexible connection is used between the submersible pump and the water supply pipeline, reducing the risk of pump flange breakage due to non-vertical installation of the submersible pump.

Description

Technical Field

[0001] This application relates to the field of submersible pump and water pipeline connection technology, and in particular to a coupling connection device for a submersible pump. Background Technology

[0002] Submersible pumps are fluid transport devices that operate entirely submerged in water. They use a motor to drive an impeller to rotate and utilize centrifugal force to transport liquids. They are mainly used in agricultural irrigation, deep well water extraction, sewage treatment, emergency drainage, and industrial water supply and drainage.

[0003] Traditional submersible pumps use rigid connections with water pipelines (such as the flange connection between the water pipeline end flange and the pump body flange). During installation, if the pipeline is not vertical, it is easy for the pump body end flange to be subjected to uneven stress and break. In addition, the vibration generated by the unit's operation affects the tightness and sealing of the connection between the water pipeline and the pump body, which in turn affects the safety of the submersible pump pipeline. Summary of the Invention

[0004] To address the aforementioned problems, this application aims to provide a coupling connection device for a submersible pump, enabling a flexible connection between the submersible pump and the water pipeline, thereby overcoming the risk of pump body flange breakage caused by non-vertical installation of the submersible pump.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: A coupling connection device for a submersible electric pump, comprising:

[0006] The coupling bracket is a flange-shaped structure that is mounted on the connecting flange of the submersible pump, and the outer side of the coupling bracket is configured as a first circumferential coupling slope.

[0007] The coupling base is also a flange-shaped structure, with its inner side configured as a second circumferential coupling slope. The coupling base is fitted around the coupling bracket and is coupled and sealed with the second circumferential coupling slope through the first circumferential coupling slope.

[0008] The housing is a cylindrical structure, which is sealed and assembled on the coupling base, and the submersible pump, the first circumferential coupling slope and the second circumferential coupling slope are located inside the housing; a cable sealing mechanism is provided on the side wall of the housing near the top port, and the cable of the submersible pump passes through the cable sealing mechanism to the outside of the housing; a water supply pipe is fixedly connected to the top of the housing;

[0009] The outlet of the submersible pump is connected to the inner cavity of the housing via the coupling bracket, and the inlet of the submersible pump is located outside the housing.

[0010] Preferably, an annular groove is formed on the first circumferential coupling inclined surface, and an annular sealing ring is provided in the annular groove. The annular sealing ring abuts against the second circumferential coupling inclined surface to achieve sealing.

[0011] Preferably, the coupling base has an annular boss extending upward near the inner ring, and the inner sidewall of the annular boss is configured as the second circumferential coupling slope.

[0012] Preferably, the cable sealing mechanism includes a sleeve passing through the side wall of the housing, the sleeve having a bore diameter adapted to the outer diameter of the cable; a step is provided inside the sleeve, a sealing ring is provided on the step, and a threaded sleeve is also provided inside the sleeve, the sealing ring being pressed against the circumferential surface of the cable for sealing by the threaded sleeve engaging with the sleeve.

[0013] The beneficial effects of this application are:

[0014] 1) The coupling bracket and the coupling base adopt a conical contact seal, which has self-centering and self-adjusting functions and is easy to install.

[0015] 2) A sealing ring is provided between the coupling bracket and the coupling base, which has a sealing function and can reduce the impact of unit vibration on the pipeline.

[0016] 3) A flexible connection is used between the submersible pump and the water pipeline to reduce the risk of the pump body flange breaking due to non-vertical installation of the submersible pump. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a submersible electric pump.

[0018] Figure 2 This is a cross-sectional view of the coupling bracket in this application.

[0019] Figure 3 For this application Figure 2 Enlarged view of the structure at point A in the middle.

[0020] Figure 4 This is a cross-sectional view of the coupling base of this application.

[0021] Figure 5 This is a cross-sectional view of the outer casing of this application.

[0022] Figure 6 For this application Figure 5 Enlarged view of the structure at point B in the middle.

[0023] Figure 7 This is a diagram showing the connection between the submersible pump and the water pipeline using the coupling device of this application.

[0024] Figure 8 For this application Figure 7 Enlarged view of the structure at point C.

[0025] In the figure: 1-Coupled bracket; 1a-First circumferential coupling ramp; 1a1-Annular groove; 2-Coupled base; 21-Annular boss; 2a-Second circumferential coupling ramp; 3-Outer shell; 4-Annular sealing ring; 5-Sleeve; 51-Step; 6-Sealing ring; 7-Threaded sleeve; 8-Submersible pump; 81-Connecting flange; 82-Cable; 8a-Inlet; 8b-Outlet; 9-Water pipeline. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] See attached document Figures 2-8 The coupling connection device of the submersible electric pump shown includes:

[0028] The coupling bracket 1 is a flange-shaped structure with several flange holes (not shown in the figure) circumferentially formed on its surface. It is assembled to the connecting flange 81 of the submersible pump 8 via connecting bolts through these flange holes. The outer surface of the coupling bracket 1 is configured as a first circumferential coupling slope 1a. Figure 2-3 As shown.

[0029] Coupling base 2, which is also a flange-shaped structure, is used to connect with water supply pipe 9, such as... Figure 4 As shown. The inner surface of the coupling base 2 is configured as a second circumferential coupling slope 2a. The coupling base 2 is fitted around the coupling bracket 1 and is coupled and sealed with the second circumferential coupling slope 2a through the first circumferential coupling slope 1a, as shown. Figure 8 As shown.

[0030] Outer shell 3, such as Figure 5 As shown, the outer shell 3 is a cylindrical structure, which is sealed and assembled (by bolts) onto the upper surface of the coupling base 2, as... Figure 7-8 As shown, the submersible pump 8, the first circumferential coupling inclined surface 1a, and the second circumferential coupling inclined surface 2a are located inside the outer casing 3. A water supply pipe 9 is mounted at the top of the outer casing 3, and both are flanged and connected by bolts.

[0031] like Figure 5-7 As shown, a cable sealing mechanism is provided on the side wall of the housing 3 near the top port, which seals the cable of the submersible pump 8 through the cable sealing mechanism to the outside of the housing 3 and connects it to the power supply.

[0032] The outlet 8b of the submersible pump 8 communicates with the inner cavity of the housing 3 through the coupling bracket 1, while the inlet 8a of the submersible pump 8 is located outside the housing 3. After the submersible pump 8 is submerged in the liquid, it is started. Utilizing the submersible pump 8's own weight and the directional force of the water flow (downward within the housing 3) during operation, a conical coupling seal is achieved between the first circumferential coupling slope 1a of the coupling bracket 1 and the second circumferential coupling slope 2a of the coupling base 2. The housing 3 is fixedly connected to the coupling base 2 and the water supply pipe 9, respectively. Water enters through the inlet 8a of the submersible pump 8 and flows into the housing 3 from the outlet 8b. Under the action of extraction pressure, the water flows from the housing 3 into the water supply pipe 9 for delivery. This coupling device achieves a flexible connection between the submersible pump 8 and the water supply pipe 9, reducing the impact of unit vibration on the pipeline and facilitating installation and maintenance.

[0033] To improve the coupling sealing performance of the coupling device, such as Figure 3 As shown, an annular groove 1a1 is provided on the first circumferential coupling inclined surface 1a, and an annular sealing ring 4 is provided in the annular groove 1a1. After the annular sealing ring 4 is embedded in the annular groove 1a1, it is higher than the first circumferential coupling inclined surface 1a, thereby abutting against the second circumferential coupling inclined surface 2a to achieve a sealing of the coupling surface.

[0034] To further increase the coupling area of ​​the second circumferential coupling ramp 2a, while reducing the weight of the coupling base 2, such as... Figure 4 , 8 As shown, the coupling base 2 has an annular boss 21 extending upwards near the inner ring. The inner sidewall of the annular boss 21 is configured as the second circumferential coupling slope 2a. The annular boss 21 is located at the inner ring of the coupling base 2, reducing the increased weight of the coupling base 2 due to its upward extension (increased thickness). The sidewall of the extended annular boss 21 ensures the area of ​​the second circumferential coupling slope 2a. Similarly... Figure 2 , 8 As shown, the first circumferential coupling slope 1a on the coupling bracket 1 is formed by extending upward on the outer side of the coupling bracket 1, thereby increasing the coupling area and improving the sealing performance while reducing weight.

[0035] Specifically, such as Figure 6-7As shown, the cable sealing mechanism includes a sleeve 5 passing through the side wall of the housing 3. The diameter of the sleeve 5 is adapted to the outer diameter of the cable, allowing the cable 82 of the submersible pump 8 to pass through the sleeve 5 and connect to the power supply. A step 51 is provided inside the sleeve 5, and a sealing ring 6 (preferably made of rubber) is provided on the step 51. This sealing ring 6 is also fitted onto the cable 82. A threaded sleeve 7 is also provided inside the sleeve 5. Through the threaded engagement of the threaded sleeve 7 with the sleeve 5 (during the tightening of the threaded sleeve 7, it axially compresses the sealing ring 6 against the step 51), the inner wall surface of the sealing ring 6 presses against the circumference of the cable 82, achieving a seal between the cable 82 and the side wall of the housing 3.

[0036] The principle of this application is as follows: A coupling bracket 1 is fixed on the submersible pump 8 and is fitted with a coupling base 2 with a conical surface. An annular sealing ring 4 is provided between the coupling bracket 1 and the coupling base 2. The coupling bracket 1 and the coupling base 2 are sealed by the weight of the submersible pump 8 itself and the directional force of the water flow during operation. The outer shell 3 is connected to the coupling base 2 and the water supply pipe 9 respectively. A cable sealing device is provided on the outer shell 3. The water flow is transferred through the outer shell 3.

[0037] During diving operations, the submersible pump 8 draws water in from the inlet 8a and discharges it from the outlet 8b, then delivers it to the water supply pipe 9 through the casing 3.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope of protection, and all such changes and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A coupling device for submersible electric pumps, characterized in that, include: The coupling bracket is a flange-shaped structure that is mounted on the connecting flange of the submersible pump, and the outer side of the coupling bracket is configured as a first circumferential coupling slope. The coupling base is also a flange-shaped structure, with its inner side configured as a second circumferential coupling slope. The coupling base is fitted around the coupling bracket and is coupled and sealed with the second circumferential coupling slope through the first circumferential coupling slope. The housing is a cylindrical structure, which is sealed and assembled on the coupling base, and the submersible pump, the first circumferential coupling ramp and the second circumferential coupling ramp are located inside the housing; A cable sealing mechanism is provided on the side wall of the outer casing near the top port, through which the cable of the submersible pump passes through the sealed cable sealing mechanism to the outside of the outer casing; a water supply pipe is fixedly connected to the top of the outer casing. The outlet of the submersible pump is connected to the inner cavity of the housing via the coupling bracket, and the inlet of the submersible pump is located outside the housing.

2. The coupling connection device according to claim 1, characterized in that: An annular groove is formed on the first circumferential coupling inclined surface, and an annular sealing ring is provided in the annular groove. The annular sealing ring abuts against the second circumferential coupling inclined surface to achieve a seal.

3. The coupling connection device according to claim 1, characterized in that: The coupling base has an annular boss extending upward near the inner ring, and the inner wall of the annular boss is configured as the second circumferential coupling slope.

4. The coupling connection device according to claim 1, characterized in that: The cable sealing mechanism includes a sleeve passing through the side wall of the outer casing, the diameter of which is adapted to the outer diameter of the cable; a step is provided inside the sleeve, a sealing ring is provided on the step, and a threaded sleeve is also provided inside the sleeve. The sealing ring is pressed against the circumference of the cable for sealing by the threaded sleeve engaging with the threaded sleeve.

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