An oil-filled deep well pump with a built-in controller

Abstract

This utility model provides an oil-filled deep well pump with a built-in controller, relating to the field of deep well pump technology. It includes an external protective housing, which is divided into a control chamber and a rotating chamber. A deep well motor is housed within the rotating chamber, and a controller is housed within the control chamber. The controller is covered with a cured protective layer formed by an insulating sealant. Multiple through slots are formed at the junction of the control chamber and the rotating chamber. The controller's lead wires extend through these slots to a terminal block on the top side of the external protective housing. The control chamber is filled with cooling oil, and a sealing cap is threaded to the bottom of the control chamber. This invention addresses the technical problems of current deep well pumps, which typically use external controllers. These problems include complex installation, poor protection, and insufficient heat dissipation. Furthermore, attempts to integrate the controller into deep well pumps face challenges such as difficult lead wire layout and low heat dissipation efficiency.

Description

Technical Field

[0001] This utility model mainly relates to the field of deep well pump technology, specifically to an oil-filled deep well pump with a built-in controller. Background Technology

[0002] Traditional deep well pumps typically employ an external controller design, connected to the pump body via a cable. This structure suffers from problems such as complex installation, poor protection, and insufficient heat dissipation. The external controller is also susceptible to environmental factors, leading to reduced reliability, and the additional wiring increases maintenance costs.

[0003] In existing technologies, some deep well pumps attempt to integrate the controller, but this still faces challenges such as difficult lead wire layout and low heat dissipation efficiency. Insufficient isolation between the controller and the motor cavity may lead to oil seepage, while complex assembly processes can easily damage the lead wires, affecting overall stability.

[0004] It should be noted that the above content falls within the scope of technical knowledge of those skilled in the art. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content

[0005] 1. The technical problem to be solved by the utility model:

[0006] This utility model provides an oil-filled deep well pump with a built-in controller to solve the technical problems existing in the background art.

[0007] 2. Technical Solution:

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows: an oil-filled deep well pump with a built-in controller, comprising an outer protective housing, the outer protective housing being divided into a control chamber and a rotating chamber, the rotating chamber housing a deep well motor, and the control chamber housing a controller. The controller is covered with a cured protective layer formed by an insulating sealant. Multiple through slots are formed at the junction of the control chamber and the rotating chamber. The controller's lead wires extend through the through slots to a terminal block on the top side of the outer protective housing. The control chamber is filled with cooling oil, and a sealing cap is threaded to the bottom of the control chamber. In this embodiment, the controller is first placed in the corresponding mold, and then the mold is filled with isolation sealant. After curing, a cured protective layer is formed on the outside of the controller, effectively preventing the heat dissipation oil from entering the controller and causing damage. Next, the controller's lead wires are connected to the terminal blocks, and the controller is installed into the control cavity. Finally, heat dissipation oil is injected into the control cavity and sealed with a sealing cap. When the deep well motor is working, the heat dissipation oil in the control cavity can simultaneously dissipate heat from both the controller and the deep well motor, which not only improves the service life of the device but also enhances the working efficiency of the deep well pump through the integrated design of the controller and the deep well motor.

[0009] Furthermore, the insulating sealant is any one of epoxy resin sealant, silicone sealant, or polyurethane potting compound.

[0010] Furthermore, the bottom of the outer protective housing is provided with a snap-fit ​​groove, which can be detachably connected to a limiting retaining ring.

[0011] Furthermore, the cooling oil is any one of mineral insulating oil, synthetic heat-conducting oil, or ordinary synthetic oil.

[0012] Furthermore, a pressure regulating diaphragm is provided at the bottom of the sealing cover.

[0013] Furthermore, an elastic sealing sleeve is provided inside the through groove.

[0014] 3. Beneficial effects:

[0015] By adopting the technical solution provided by this utility model, the controller and the deep well motor are integrated into one design and an oil-filled heat dissipation structure is used to achieve synchronous and efficient heat dissipation of the controller and the motor, which significantly improves the working efficiency and reliability of the equipment.

[0016] Through multiple sealing designs, including isolation sealant and pressure regulating membrane, the system effectively prevents heat dissipation oil leakage and the entry of external contaminants, ensuring long-term stable operation of the equipment in the harsh environment of deep wells.

[0017] The detachable limit ring reduces maintenance costs and improves the overall economy and practicality of deep well pumps.

[0018] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the opening structure of the sealing cap of this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0023] Figure label:

[0024] 1. External protective housing; 2. Control chamber; 3. Rotating chamber; 4. Deep well motor; 5. Controller; 6. Through slot; 61. Elastic sealing sleeve; 7. Wiring terminal; 8. Sealing cover; 11. Limiting ring; 12. Pressure regulating diaphragm. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] It should be noted that structures not described in this invention do not involve the design points and improvement directions of this invention, and can all be achieved using existing technologies known to those skilled in the art.

[0030] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0031] See attached document Figure 1-4 An oil-filled deep well pump with a built-in controller includes an outer protective housing 1, which is divided into a control chamber 2 and a rotating chamber 3. A deep well motor 4 is housed within the rotating chamber 3, and a controller 5 is housed within the control chamber 2. The controller 5 is covered with a cured protective layer formed by an insulating sealant. Multiple through slots 6 are formed at the junction of the control chamber 2 and the rotating chamber 3. Lead wires of the controller 5 pass through the through slots 6 and extend to a terminal 7 on the top side of the outer protective housing 1. The control chamber 2 is filled with cooling oil, and a sealing cap 8 is threaded to the bottom of the control chamber 2. In this embodiment, the controller 5 of this device adopts existing technology. The working principle will not be elaborated here. First, the controller 5 is placed in the corresponding mold, and then the mold is filled with isolation sealant. After curing, a cured protective layer is formed on the outside of the controller 5, which effectively prevents the heat dissipation oil from entering the controller 5 and causing damage. Next, the lead wire of the controller 5 is connected to the terminal 7, and the controller 5 is installed into the control cavity 2. Finally, heat dissipation oil is injected into the control cavity 2 and sealed by the sealing cover 8. When the deep well motor 4 is working, the heat dissipation oil in the control cavity 2 can dissipate heat for both the controller 5 and the deep well motor 4, which not only improves the service life of the device, but also improves the working efficiency of the deep well pump by integrating the controller 5 and the deep well motor 4.

[0032] The isolation sealant can be any one of epoxy resin sealant, silicone sealant, or polyurethane potting compound. In this embodiment, the specific material of the isolation sealant can be selected according to the actual working conditions. Epoxy resin sealant is suitable for occasions requiring high-strength protection, silicone sealant is suitable for high-temperature working environments, and polyurethane potting compound is suitable for application scenarios that require both flexibility and sealing. By selecting a suitable sealant material, reliable isolation between the controller 5 and the heat dissipation oil can be ensured, and the usage requirements under different working environments can be met.

[0033] The bottom of the outer protective housing 1 is provided with a snap-fit ​​groove, which is detachably connected to a retaining ring 11. In this embodiment, after the sealing cover 8 and the outer protective housing 1 are threaded together, the retaining ring 11 is precisely snapped into the snap-fit ​​groove, forming a double fixing structure. This retaining ring 11 can not only effectively limit the axial displacement of the sealing cover 8 and prevent the threads from loosening due to long-term vibration, but also can be quickly disassembled during maintenance, facilitating the replacement of cooling oil and the inspection of internal components, significantly improving the reliability and maintenance convenience of the equipment.

[0034] The cooling oil can be any one of mineral insulating oil, synthetic heat transfer oil, or ordinary synthetic oil. In this embodiment, the specific selection of cooling oil can be optimized according to the actual working environment and usage requirements. Mineral insulating oil is suitable for normal working temperature environments and has cost-effectiveness advantages. Synthetic heat transfer oil is more suitable for high temperature or extreme temperature conditions, and its excellent thermal stability and anti-oxidation performance can significantly extend the service life of the equipment. Ordinary synthetic oil ensures basic heat dissipation performance while taking into account economy and availability. By reasonably selecting the type of cooling oil, it is possible to ensure efficient heat dissipation of controller 5 and deep well motor 4, and adapt to the temperature control requirements under different application scenarios, thereby comprehensively improving the working reliability and environmental adaptability of the deep well pump.

[0035] The bottom of the sealing cover 8 is provided with a pressure regulating diaphragm 12. In this embodiment, the pressure regulating diaphragm 12 is made of elastic polymer material and is installed at the bottom of the sealing cover 8 in direct contact with the cooling oil. When the deep well pump is working, the pressure regulating diaphragm 12 can automatically adjust its deformation according to the internal oil pressure changes, effectively balancing the pressure fluctuations in the control chamber 2. This design not only avoids abnormal oil pressure rises due to temperature changes and prevents damage to the sealing structure, but also maintains the stable working state of the cooling oil circulation system. At the same time, the elastic properties of the pressure regulating diaphragm 12 can also form a slight negative pressure when the equipment stops working, reducing the risk of external contaminants entering and further improving the sealing reliability and service life of the equipment.

[0036] The through groove 6 is provided with an elastic sealing sleeve 61. In this embodiment, the elastic sealing sleeve 61 is made of oil-resistant rubber material and tightly wraps the lead wire of the controller 5. The sealing sleeve has memory rebound characteristics, which can adapt to lead wires of different diameters. Its flexibility can buffer the damage to the lead wire caused by vibration caused by the through groove 6, and reduce the risk of line breakage.

[0037] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An oil filled deep well submersible pump with built-in controller characterized in that: The device includes an outer protective housing (1), which is divided into a control cavity (2) and a rotating cavity (3) on the top and bottom. A deep well motor (4) is installed in the rotating cavity (3), and a controller (5) is installed in the control cavity (2). The controller (5) is covered with a cured protective layer formed by an isolation sealant. Multiple through slots (6) are opened at the junction of the control cavity (2) and the rotating cavity (3). The lead wire of the controller (5) extends through the through slots (6) to the wiring terminal (7) on the top side of the outer protective housing (1). The control cavity (2) is filled with heat dissipation oil, and a sealing cap (8) is threaded to the bottom of the control cavity (2).

2. The oil filled deep well submersible pump with built-in controller as claimed in claim 1 wherein: The insulating sealant is any one of epoxy resin sealant, silicone sealant, or polyurethane potting compound.

3. The oil-filled deep well pump with a built-in controller according to claim 1, characterized in that: The bottom of the outer protective housing (1) is provided with a snap-fit ​​groove, which can be detachably connected to a limiting retaining ring (11).

4. The oil-filled deep well pump with a built-in controller according to claim 1, characterized in that: The cooling oil is any one of mineral insulating oil, synthetic heat-conducting oil, or ordinary synthetic oil.

5. An oil-filled deep well pump with a built-in controller according to claim 1, characterized in that: The bottom of the sealing cap (8) is provided with a pressure regulating membrane (12).

6. The oil-filled deep well pump with a built-in controller according to claim 1, characterized in that: An elastic sealing sleeve (61) is provided inside the through groove (6).

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