Power distribution protection system for submersible motor

Abstract

The utility model provides a power distribution protection system for a submersible motor, and relates to the technical field of submersible motor protection. The submersible motor control box comprises a circuit breaker connected with the submersible motor, and a leakage protector, a water leakage overheating protection unit, a contactor and a motor protector which are connected in sequence. Water leakage of a shell of the submersible motor can be avoided, the situation that the motor is burnt and even nearby water is electrified due to damage of an insulating layer of the motor is avoided, the safety and practicability of the submersible motor are improved, meanwhile, power distribution protection of the submersible motor forms a complete system, and the problems that the submersible motor is large in torque, high in starting current and poor in stability are solved. A thermal protection power distribution loop of a conventional motor is small in applicable protection range, and different electrical elements of different models need to be replaced each time.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible motor protection, in particular to a power distribution protection system for submersible motors. Background Art

[0002] Because submersible motors are installed underwater, they may experience problems such as leakage in the motor casing. Leakage can damage the motor's insulation, often burning the motor. In severe cases, it can electrify nearby water, causing significant damage to life and property. However, commercially available submersible motors are typically non-standard, and conventional submersible motor controllers are expensive, large, and have long lead times, making them less widely used. Furthermore, submersible motors have high torque and high starting current, while conventional motors' thermal protection distribution circuits have a limited range of protection, requiring replacement of different electrical components for each model. Utility Model Content

[0003] The present application provides a power distribution protection system for a submersible motor to at least solve one technical problem existing in the related art.

[0004] The present application provides a power distribution protection system for a submersible motor, comprising: a submersible motor control box; the submersible motor control box comprises: a circuit breaker connected to the submersible motor, and a leakage protector, a water leakage and overheating protection unit, a contactor and a motor protector connected in sequence.

[0005] As an optional embodiment, the control box is connected to an alarm device for outputting an alarm signal when the leakage protector and / or the contactor and / or the motor protector and / or the water leakage and overheating protection unit detects a power distribution fault.

[0006] As an optional implementation, the rated residual operating current of the circuit breaker is 300 mA.

[0007] As an optional implementation, the motor protector includes an overload protection function, a blocking protection function, a phase failure protection function, a three-phase unbalance protection function, an undercurrent protection function, a grounding protection function, a PTC temperature protection function, and a communication protection function.

[0008] As an optional implementation manner, the setting current range of the motor protector includes multiple segments.

[0009] As an optional embodiment, the submersible motor control box includes a control panel and a display screen, and the control panel and the display screen are embedded in the door panel of the control box and can display the operating current in real time.

[0010] As an optional embodiment, the control panel also includes an overload fault indicator light, a blockage fault indicator light, a phase failure fault indicator light, a three-phase imbalance fault indicator light, an undercurrent fault indicator light, a grounding fault indicator light, a PTC temperature fault indicator light and a communication fault indicator light, which light up when the motor protector identifies overload, blockage, phase failure, three-phase imbalance, undercurrent, grounding, PTC temperature fault and communication fault.

[0011] As an optional implementation, the water leakage and overheating protection unit includes a water leakage and overheating dual detection relay protector.

[0012] As an optional embodiment, the submersible motor control box includes a double door, and the outer door is provided with a glass window; the top of the submersible motor control box is also provided with a rainproof structure.

[0013] As an optional implementation, the control panel is further provided with a stop button, a start button, a manual / automatic switch and an operation signal indicator light.

[0014] In an embodiment of the present application, a power distribution protection system for a submersible motor is provided, comprising a submersible motor control box containing a circuit breaker, a leakage protector, a contactor, a motor protector, and a water leakage and overheating protection unit, each connected to the submersible motor. This system prevents water leakage from the submersible motor casing, thereby avoiding damage to the motor insulation layer, which could potentially burn the motor or even electrify nearby water. This improves the safety and practicality of the submersible motor. Furthermore, it forms a complete power distribution protection system for the submersible motor, resolving the technical issues of high torque and high starting current in submersible motors, the limited protection range of conventional motor thermal protection distribution circuits, and the need to replace different electrical components for each model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 It is a structural schematic diagram of a power distribution protection system for a submersible motor provided according to an embodiment of the present application.

[0018] Reference numerals

[0019] 1. Circuit breaker; 2. Leakage protector; 3. Water leakage and overheat protection unit; 4. Contactor; 5. Motor protector. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0021] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0022] like Figure 1 As shown, the present application provides a power distribution protection system for a submersible motor, comprising: a submersible motor control box; the submersible motor control box comprises: a circuit breaker 1 connected to the submersible motor, and a leakage protector 2, a water leakage and overheating protection unit 3, a contactor 4 and a motor protector 5 connected in sequence.

[0023] It can prevent water leakage from the submersible motor casing, thus avoiding damage to the motor insulation layer, which may lead to burning of the motor and even electrification of nearby water bodies, thereby improving the safety and practicality of the submersible motor. At the same time, it makes the power distribution protection of the submersible motor form a complete system, solving the technical problems of large torque and high starting current of the submersible motor, small applicable protection range of the thermal protection distribution circuit of the conventional motor, and the need to replace different electrical components each time for different models.

[0024] In addition, the circuit breaker 1, and the leakage protector 2, water leakage and overheating protection unit 3, contactor 4 and motor protector 5 connected in sequence can be connected to the plant central control system respectively, and can directly feed back to the plant central control system, thereby improving the intelligence level of the power distribution protection system.

[0025] As an optional embodiment, the control box is connected to an alarm device for outputting an alarm signal when the leakage protector 2 and / or the contactor 4 and / or the motor protector 5 and / or the water leakage and overheating protection unit 3 detects a power distribution fault.

[0026] Wherein, the alarm device can be an audible and visual alarm buzzer. The provision of the alarm device can further improve the practicality of the power distribution protection system and improve the safety of the submersible motor.

[0027] As an optional implementation, the rated residual operating current of the circuit breaker 1 is 300 mA.

[0028] The circuit breaker 1 with 300mA rated residual operating current protection can effectively disconnect the control circuit when a leakage occurs in the line. Moreover, since the residual operating current is 300mA, it can effectively avoid erroneous opening and closing operations in a humid environment.

[0029] As an optional implementation, the motor protector 5 includes an overload protection function, a blocking protection function, a phase failure protection function, a three-phase unbalance protection function, an undercurrent protection function, a grounding protection function, a PTC temperature protection function, and a communication protection function.

[0030] Use a motor protector 5 with protections such as overload, blockage, phase failure, three-phase imbalance, undercurrent, grounding, PTC temperature, and communication failure to meet the operating needs of the submersible motor. You can use a motor protector 5 suitable for AC motors with a rated current of 1 to 800A that can work long-term or intermittently.

[0031] As an optional implementation manner, the setting current range of the motor protector 5 includes multiple segments.

[0032] For example, the current setting range of the motor protector 5 can be set to 6 sections: 5A, 10A, 40A, 100A, 400A, and 800A. The characteristic parameters of the motor protector 5 can also be networked using RS485 communication, enabling remote monitoring, control, and fault query of the submersible motor through a host computer.

[0033] As an optional embodiment, the submersible motor control box includes a control panel and a display screen, which are embedded in the door panel of the control box and can display the operating current in real time without adding an ammeter conversion.

[0034] As an optional embodiment, the control panel also includes an overload fault indicator light, a blockage fault indicator light, a phase failure fault indicator light, a three-phase imbalance fault indicator light, an undercurrent fault indicator light, a grounding fault indicator light, a PTC temperature fault indicator light and a communication fault indicator light, which light up when the motor protector identifies overload, blockage, phase failure, three-phase imbalance, undercurrent, grounding, PTC temperature fault and communication fault.

[0035] As an optional embodiment, the water leakage and overheating protection unit 3 includes a water leakage and overheating dual-detection relay protector. When a water leakage and overheating signal is fed back from the submersible motor, the water leakage and overheating dual-detection relay protector outputs an alarm, disconnects the motor's secondary circuit, and generates an audible and visual alarm at the control box. Simultaneously, the relay is connected to the plant's central control system, and the signal is transmitted back to the plant's central control system to generate an alarm, facilitating timely troubleshooting by maintenance personnel.

[0036] As an optional embodiment, the submersible motor control box includes a double door, and the outer door is provided with a glass window; the top of the submersible motor control box is also provided with a rainproof structure.

[0037] Submersible motor control boxes are generally installed near water bodies in humid environments, and some water contains corrosive substances. Therefore, the main body material can be made of stainless steel 304, with double doors, the outer door with a glass window, anti-corrosion grade WF2, and a rain cap on the top of the box. The protection grade of the entire box is not less than IP55.

[0038] As an optional implementation, the control panel is further provided with a stop button, a start button, a manual / automatic switch and an operation signal indicator light.

[0039] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0040] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above-mentioned computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling one or more electronic devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application.

[0041] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0042] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, and can be electrical or other forms.

[0043] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the purpose of the solution provided in this embodiment.

[0044] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0045] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0046] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A power distribution protection system for a submersible motor, characterized in that: include: Submersible motor control box; The submersible motor control box includes: a circuit breaker connected to the submersible motor, and a leakage protector, a water leakage and overheating protection unit, a contactor and a motor protector connected in sequence.

2. The power distribution protection system for submersible motors according to claim 1, characterized in that: The control box is connected to an alarm device and is used to output an alarm signal when the leakage protector and / or the contactor and / or the motor protector and / or the water leakage and overheating protection unit detects a power distribution fault.

3. The power distribution protection system for submersible motors according to claim 1, characterized in that: The rated residual operating current of the circuit breaker is 300mA.

4. The power distribution protection system for submersible motors according to claim 1, wherein: The motor protector includes overload protection function, blocking protection function, phase failure protection function, three-phase unbalance protection function, undercurrent protection function, grounding protection function, PTC temperature protection function and communication protection function.

5. The power distribution protection system for submersible motors according to claim 4, characterized in that: The setting current range of the motor protector includes multiple segments.

6. The power distribution protection system for submersible motors according to claim 4, characterized in that: The submersible motor control box includes a control panel and a display screen, which are embedded in the door panel of the control box and can display the operating current in real time.

7. The power distribution protection system for submersible motors according to claim 6, characterized in that: The control panel also includes an overload fault indicator light, a blockage fault indicator light, a phase failure fault indicator light, a three-phase imbalance fault indicator light, an undercurrent fault indicator light, a grounding fault indicator light, a PTC temperature fault indicator light and a communication fault indicator light, which light up respectively when the motor protector identifies overload, blockage, phase failure, three-phase imbalance, undercurrent, grounding, PTC temperature fault and communication fault.

8. The power distribution protection system for submersible motors according to claim 1, characterized in that: The water leakage and overheating protection unit includes a water leakage and overheating dual detection relay protector.

9. The power distribution protection system for a submersible motor according to claim 1, characterized in that: The submersible motor control box comprises a double-layer door, wherein the outer door is provided with a glass window; and a rainproof structure is also provided on the top of the submersible motor control box.

10. The power distribution protection system for submersible motors according to claim 6, characterized in that: The control panel is also provided with a stop button, a start button, a manual / automatic switch and an operation signal indicator light.

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