Wiring insulation processing method for junction box of high-voltage cable motor

Abstract

The invention discloses a high-voltage cable motor junction box wiring insulation processing method, and relates to the technical field of cable insulation protection, and the method comprises the following steps: S1, an insulation umbrella skirt fixing step: fixing an insulation umbrella skirt at a threading hole of a motor junction box; s2, a cable lead penetrating step: at least three high-voltage cable leads are respectively arranged in the fixed insulating umbrella skirts in a penetrating manner; s3, a lead separation and wiring step: physically separating each high-voltage cable lead from each other by using the umbrella-shaped structure of the insulating umbrella skirt, and correspondingly connecting each lead to a wiring terminal in the junction box; wherein the high-voltage cable leads are separated by the insulating umbrella skirts, so that the phase-to-phase distance meeting the safety requirement is kept between the high-voltage cable leads, the occurrence of the phase-to-phase discharge phenomenon is effectively inhibited, the risk of equipment failure is reduced, and finally the stability and the safety of motor operation are improved.

Description

A method for insulating the wiring of a high-voltage cable motor junction box Technical Field

[0001] This invention relates to the field of cable insulation protection technology, and in particular to a method for insulating the wiring of a high-voltage cable motor junction box. Background Technology

[0002] In industrial production systems, high-voltage motors are critical power supply equipment, and their stable operation is essential for the smooth operation of the entire production process. Junction boxes, as the core component that enables the electrical connection between high-voltage cables and high-voltage motors, must meet a series of stringent performance requirements, including explosion-proof and sealing requirements.

[0003] Currently, motor junction boxes generally adopt an explosion-proof enclosed structure. While this structure performs excellently in terms of explosion protection and sealing, it also brings some problems. Due to the relatively compact internal space of the junction box and the lack of good visibility, insufficient phase-to-phase distance can easily occur between the three cable leads during high-voltage cable connection operations due to unavoidable errors during installation and space limitations. Furthermore, the enclosed environment of the junction box prevents workers from directly and visually observing the actual condition of the internal leads. Insufficient phase-to-phase distance can lead to excessively high local electric field strength, resulting in phase-to-phase discharge. If this phenomenon persists for a long time, it will cause cable insulation aging and may even lead to short-circuit faults, potentially causing equipment shutdowns and even safety accidents, posing a serious threat to the stability and safety of industrial production. Summary of the Invention

[0004] The purpose of this invention is to provide a method for insulating the wiring of a high-voltage cable motor junction box, so as to solve the problems existing in the prior art, effectively suppress the occurrence of phase-to-phase discharge, reduce the risk of equipment failure, and ultimately improve the stability and safety of motor operation.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a method for insulating the wiring in a high-voltage cable motor junction box, comprising the following steps:

[0007] S1. Insulating skirt fixing steps: Fix the insulating skirt to the wiring hole of the motor junction box to provide a foundation for the subsequent cable lead installation. Ensure that the insulating skirt can stably perform its separation and insulation functions at the wiring hole, so that the cable lead is within the protection and separation range of the insulating skirt at the wiring hole position, ensuring the initial setting and stability of the phase distance.

[0008] S2. Cable lead installation steps: At least three high-voltage cable leads are respectively installed in the fixed insulating shed, realizing the combination of cable leads and insulating shed. The insulating shed separates each cable lead, avoiding contact between the leads. From a physical perspective, the phase distance is initially guaranteed, reducing the risk of phase-to-phase discharge and laying the foundation for subsequent wiring and safe operation.

[0009] S3. Lead Separation and Wiring Procedure: The umbrella-shaped structure of the insulating skirt physically separates the high-voltage cable leads, and each lead is connected to the corresponding terminal block in the junction box. This further strengthens the physical separation between the cable leads, ensuring a safe distance is maintained between them during the connection process and preventing phase-to-phase discharge caused by reduced lead spacing during wiring. Simultaneously, the wiring completes the electrical connection between the high-voltage cable and the motor, ensuring normal motor operation.

[0010] The key objective of this method is to maintain a safe phase-to-phase distance between each high-voltage cable lead through the separation of the insulating sheds. The insulating sheds effectively suppress phase-to-phase discharge, ensuring the safe and stable operation of the high-voltage cable motor junction box, improving the reliability of motor operation, and reducing the risk of failures caused by insufficient phase-to-phase distance.

[0011] Preferably, before step S1, the method further includes: an insulating skirt selection step: selecting an insulating skirt with an insulation class that matches the rated voltage of the high-voltage motor, ensuring that the insulating skirt can provide reliable insulation performance under the working voltage environment of the high-voltage motor, avoiding insulation failure due to insufficient insulation class, thereby enhancing the safety and applicability of the entire insulation treatment method, and ensuring that the insulating skirt can play an effective role in practical applications.

[0012] Preferably, the insulating umbrella skirt is a rainproof umbrella skirt made of silicone rubber. Silicone rubber has good insulation properties, aging resistance and flexibility. As a rainproof umbrella skirt, it can not only meet the insulation requirements, but also adapt to different environmental conditions, such as humid environments, extend the service life of the insulating umbrella skirt, reduce insulation failures caused by material problems, and improve the reliability and durability of the insulating umbrella skirt.

[0013] Preferably, the size of the insulating skirt matches the size of the wire hole and the internal space of the motor junction box, ensuring that the insulating skirt can be tightly installed at the wire hole, making full use of the internal space of the junction box, effectively separating the cable leads, ensuring that the phase distance meets safety requirements, and avoiding installation difficulties or ineffective separation of leads due to size mismatch, thereby improving the operability and practicality of the insulation treatment method.

[0014] Preferably, step S2 specifically involves: inserting the insulating shed from the end of the high-voltage cable lead and moving it along the lead to the wire hole for fixing. This installation method is simple and convenient to operate, easy for workers to implement, and can ensure that the insulating shed is accurately installed at the wire hole position. At the same time, it is not easy to damage the insulating shed and the cable lead during the installation process, thus improving installation efficiency and installation quality.

[0015] Preferably, after step S3, an inspection step is also included: checking whether the insulating skirt has fallen off or deformed, and confirming whether the phase distance between each high-voltage cable lead meets the safety standard, so as to promptly detect problems such as falling off or deforming of the insulating skirt during the wiring process, and whether the phase distance between the cable leads meets the safety requirements, so as to make timely adjustments and repairs, ensure the effect of insulation treatment and the safety of motor operation, and avoid safety hazards caused by potential problems not being discovered.

[0016] Preferably, before step S1, a cable pretreatment step is included: disconnecting the power supply, cleaning and inspecting the high-voltage cable leads to be connected. Disconnecting the power supply ensures the personal safety of operators and avoids electric shock accidents. Cleaning the cable leads removes surface oil, dust, and other impurities, preventing these impurities from affecting insulation performance or causing electrical faults. Inspecting the cable leads helps to identify potential damage or defects, allowing for early repair or replacement, ensuring the connected cable leads are in good condition, and improving the reliability and stability of the entire insulation treatment method.

[0017] Preferably, the edge of the insulating shed has a cut-resistant structure to protect the high-voltage cable lead threaded therein. During the cable lead threading and operation, it prevents the edge of the threading hole or other sharp objects from cutting the cable lead thread, avoids the reduction of insulation performance due to damage to the cable lead thread sheath, further improves the safety and reliability of the cable lead thread, and extends the service life of the cable.

[0018] The present invention achieves the following technical effects compared to the prior art:

[0019] This invention provides a method for insulating the wiring in a high-voltage cable motor junction box.

[0020] By fixing insulating sheds at the wiring holes of the motor junction box and threading the high-voltage cable leads through them, the umbrella-shaped structure of the insulating sheds physically separates the leads, effectively ensuring that the phase-to-phase distance between the high-voltage cable leads meets safety requirements. This design fundamentally solves the problem of phase-to-phase discharge caused by insufficient phase-to-phase distance in traditional junction boxes due to their compact internal space. Furthermore, the reliability and safety of the insulation process are further guaranteed through the selection of insulating sheds, cable pretreatment, and subsequent inspection procedures. The use of silicone rubber gives the insulating sheds excellent insulation, aging resistance, and flexibility, enabling them to adapt to various environmental conditions and extend their service life. The entire method is convenient to operate, cost-effective, significantly improves the operational stability of high-voltage motor junction boxes, reduces the risk of equipment failure, and provides strong support for the safe and reliable operation of high-voltage motors in industrial production. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 is a flowchart of the method for insulating the wiring of a high-voltage cable motor junction box provided by the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The purpose of this invention is to provide a method for insulating the wiring of a high-voltage cable motor junction box, so as to solve the problems existing in the prior art, effectively suppress the occurrence of phase-to-phase discharge, reduce the risk of equipment failure, and ultimately improve the stability and safety of motor operation.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The following are the specific steps for using the high-voltage cable motor junction box wiring insulation treatment method provided by this invention:

[0027] Cable pretreatment:

[0028] First, disconnect the power supply to the high-voltage motor to ensure a safe operating environment and avoid the risk of electric shock.

[0029] Use a cleaning cloth to carefully wipe the surface of the high-voltage cable lead to be connected to remove oil, dust and other impurities, which may affect the insulation performance of the cable or cause poor electrical connection.

[0030] A thorough inspection should be conducted to check for any damage or aging in the cable leads. If severe damage is found, the cable termination should be replaced to ensure the normal operation of the cable.

[0031] Insulating skirt selection: Based on the rated voltage of the high-voltage motor, strictly select insulating skirts with an insulation class that matches it. For example, for a 10kV high-voltage motor, insulating skirts suitable for a 10kV voltage level should be selected to ensure that the insulating skirts can provide reliable insulation protection under the motor's operating voltage.

[0032] Insulating skirt fixing: Confirm that the selected insulating skirt is a silicone rubber rainproof skirt, and that its size matches the wire hole size and internal space of the motor junction box. Slide the insulating skirt onto the end of the high-voltage cable lead, then slowly move it along the lead to the wire hole of the motor junction box, and secure it firmly, ensuring that the insulating skirt does not loosen or shift at the wire hole.

[0033] Cable lead installation: At least three high-voltage cable leads are respectively threaded through the insulating sheds that are fixed at the wire insertion holes. The umbrella-shaped structure of the insulating sheds physically separates the high-voltage cable leads from each other, thus initially ensuring the phase distance between the leads.

[0034] Lead separation and connection: Continue to use the insulating skirts to ensure that the phase distance between each high-voltage cable lead is in accordance with the safety requirements. Then, connect each lead to the corresponding terminal in the junction box and tighten the terminal with appropriate tools (such as a wrench) to ensure that the electrical connection is firm and reliable.

[0035] Inspection: After wiring is completed, carefully inspect whether the insulating sheds have fallen off or deformed, ensuring that the insulating sheds can still effectively separate the cable leads. At the same time, reconfirm whether the phase-to-phase distance between each high-voltage cable lead meets the safety standards. If the phase-to-phase distance is found to be non-compliant or the insulating sheds are found to be abnormal, adjustments or repairs must be made in a timely manner.

[0036] Processing Completion: After confirming that all inspection items meet the requirements, complete the insulation treatment of the high-voltage cable motor junction box wiring. Afterwards, power supply to the motor can be restored, allowing the motor to operate normally. During motor operation, it is recommended to conduct regular inspections to ensure that the insulation skirts remain in good working condition and that the phase-to-phase distance of the cable leads consistently meets safety standards, ensuring the stable and safe operation of the high-voltage motor.

[0037] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A method for insulating the wiring of a high-voltage cable motor junction box, characterized in that, Includes the following steps: S1. Insulating skirt fixing step: Fix the insulating skirt to the wiring hole of the motor junction box; S2. Cable lead threading step: Thread at least three high-voltage cable leads through the fixed insulating skirt; S3. Lead separation and wiring step: Use the umbrella-shaped structure of the insulating skirt to physically separate the high-voltage cable leads, and connect each lead to the corresponding terminal in the junction box; wherein, through the separation of the insulating skirt, the phase distance between the high-voltage cable leads is maintained in accordance with safety requirements.

2. The method according to claim 1, characterized in that, Before step S1, the following steps are included: Insulating skirt selection step: Selecting an insulating skirt whose insulation class matches the rated voltage of the high-voltage motor.

3. The method according to claim 2, characterized in that, The insulating umbrella skirt is a rainproof umbrella skirt made of silicone rubber.

4. The method according to claim 1, characterized in that, The dimensions of the insulating skirt are matched with the wire hole size and internal space of the motor junction box.

5. The method according to claim 1, characterized in that, Step S2 specifically involves: inserting the insulating skirt from the end of the high-voltage cable lead and moving it along the lead to the wire hole for fixing.

6. The method according to claim 1, characterized in that, Following step S3, an inspection step is also included: checking whether the insulating skirt has fallen off or deformed, and confirming whether the phase-to-phase distance between each high-voltage cable lead meets safety standards.

7. The method according to claim 1, characterized in that, The step S1 is preceded by a cable pretreatment step: disconnecting the power supply and cleaning and inspecting the leads of the high-voltage cable to be connected.

8. The method according to any one of claims 1 to 7, characterized in that, The edge of the insulating skirt has a cut-resistant structure to protect the high-voltage cable leads running through it.

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