Grounding resistance tester for electric power tower

Abstract

The invention discloses a grounding resistance tester for an electric power tower. The grounding resistance tester comprises a case, a test wire harness, an automatic wire spool and a main controller, wherein the test wire harness, the automatic wire spool and the main controller are integrally arranged in the case; a winding shaft of the automatic wire spool is made of a flexible composite material; the test wire bundle is wound in the automatic wire spool, and the test end of the test wire bundle is connected with the main controller; the controlled end of the automatic wire spool is connected with the main controller; a first user interaction interface and a second user interaction interface are respectively arranged on the surface of the case, and an image acquisition device aligned with the automatic wire spool is arranged in the case; the first user interaction interface is in communication interaction with the image acquisition device, the image acquisition device is in communication interaction with the main controller, and the second user interaction interface is in communication interaction with the main controller. According to the invention, the flexibility and efficiency of the test work are improved, the reliability and safety of the test are improved, the integration level and stability of the circuit are improved, the optimization of heat dissipation and electromagnetic compatibility is facilitated, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of instrument detection, in particular to a ground resistance tester for a power pole tower. Background Art

[0002] With the development of the power industry and the advancement of technology, the stability and safety of transmission and distribution lines, as an important part of the power system, are increasingly valued.

[0003] In the grounding system of power towers, the resistance value of grounding resistance is a key indicator to measure the reliability of grounding, and plays a vital role in preventing lightning strikes, protecting equipment and personal safety. Traditional testers are often large and heavy, and are subject to the limitations of existing device structures. They need to connect wires separately, resulting in cumbersome operation and poor storage effect. The test wires need to be stored manually, which is cumbersome. This not only increases the labor intensity of testers, but also limits the application of testers in complex terrain and high-altitude operations, seriously affecting test efficiency and safety.

[0004] It can be seen that how to design a structure of a ground resistance tester for a power tower to improve the convenience of power maintenance operations has become a technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] The invention provides a ground resistance tester for a power pole tower, thereby providing a convenient effect for power maintenance workers to perform resistance testing at high altitudes.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a ground resistance tester for a power pole tower, comprising a chassis and a test wire bundle integrated in the chassis, an automatic winding reel whose winding shaft is made of a flexible composite material, and a main controller.

[0007] The test wire bundle is wound in the automatic winding reel, and the test end of the test wire bundle is connected to the main controller.

[0008] The controlled end of the automatic winding reel is connected to the main controller.

[0009] The chassis has a first user interaction interface and a second user interaction interface on its surface, and an image acquisition device aimed at the automatic winding reel is provided inside the chassis; the first user interaction interface communicates and interacts with the image acquisition device, the image acquisition device communicates and interacts with the main controller, and the second user interaction interface communicates and interacts with the main controller.

[0010] Furthermore, a number of permanent magnets and electromagnetic coils are disposed inside the chassis, the automatic winding reel is made of magnetic material, and a number of air springs are disposed on the bottom and sides thereof, respectively.

[0011] The controlled ends of the permanent magnet and the electromagnetic coil are respectively connected to the main controller.

[0012] Furthermore, a number of vibrators and first state sensing sensors are evenly distributed on the surface of the automatic winding reel, and a number of second state sensing sensors are arranged in the chassis.

[0013] The controlled end of the vibrator is connected to the main controller, and the data transmission ends of the first state sensing sensor and the second state sensing sensor are respectively connected to the main controller.

[0014] Furthermore, the main controller is composed of a multi-layer PCB board.

[0015] Furthermore, the multi-layer PCB board at least includes a first PCB layer, a second PCB layer, a third PCB layer and a fourth PCB layer which are stacked in sequence.

[0016] The driving circuit and the control circuit of the automatic winding reel are arranged on the first PCB layer.

[0017] The second PCB layer includes a ground circuit.

[0018] The third PCB layer includes a power supply circuit.

[0019] The test circuit of the test end is arranged on the fourth PCB layer.

[0020] Furthermore, the first PCB layer, the second PCB layer, the third PCB layer and the fourth PCB layer of the multi-layer PCB board are electrically connected through blind vias and buried vias.

[0021] Furthermore, a flexible connection structure is used between the components in the chassis.

[0022] Furthermore, the flexible connection structure includes a flexible rubber joint and a spring damper.

[0023] Furthermore, the automatic wire winding reel is equipped with a wire winding controller, and the wire winding controller is used to control the automatic retraction and extension of the test wire bundle.

[0024] Furthermore, the motor of the automatic winding reel and the components of the main controller are coated with electromagnetic shielding materials.

[0025] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0026] By integrating an automatic winding reel, the test wire harness can be automatically retracted and released, avoiding the tedious process of manual arrangement. At the same time, key components such as the automatic winding reel, test wire harness, and main controller are integrated into a portable chassis to form a more compact, lightweight, tightly integrated structure, which improves the flexibility and efficiency of the test work; through the application of electromagnetic shielding materials and flexible connection structures, electromagnetic interference and equipment vibration are effectively reduced, further improving the reliability and safety of the test; using a multi-layer PCB board design, circuits with different functions are arranged in layers, which not only improves the integration and stability of the circuit, but also is conducive to the optimization of heat dissipation and electromagnetic compatibility, and extends the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A structural block diagram of a chassis of a ground resistance tester for a power tower provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. The purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of this application, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0030] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are only for illustrative purposes, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In the description of this application, it should be noted that, unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0032] An embodiment of the present invention provides a ground resistance tester for a power tower. For details, see Figure 1 , Figure 1 The chassis structure block diagram of the ground resistance tester for power pole tower provided by the embodiment of the present invention is shown. Specifically, the ground resistance tester of this embodiment includes a chassis and a test wire bundle integrated in the chassis, an automatic winding reel whose winding shaft is made of a flexible composite material, and a main controller.

[0033] The shell of the wire tester of this embodiment is made of portable plastic material, integrating various components such as the test wire bundle, automatic winding reel, main controller, memory, display and power supply. The shell serves as the external protection structure of the equipment to protect the internal components from the external environment (such as dust, moisture, mechanical shock), integrate the internal components and provide portability. The plastic material is light in weight, easy to carry and move, suitable for operation on power poles and towers, and has good insulation properties, thereby improving the safety of the equipment.

[0034] The test wire harness is used to connect the grounding device of the power tower and transmit the test signal. It is wound in an automatic winding reel for quick retraction and release, and the test end of the test wire harness is connected to the main controller.

[0035] The function of the automatic winding reel is to wind and retract the test wire bundle. It is equipped with a winding controller, which controls the automatic retraction and release of the test wire bundle. The winding controller is connected to the main controller; the winding shaft of the automatic winding reel is made of flexible composite materials, which has high durability and flexibility and can adapt to complex environments.

[0036] The main controller is a multi-layer PCB board structure. The main controller controls the operation of the entire resistance tester, including the rotation of the automatic winding reel, the analysis of the images captured by the image acquisition device, and the control of the output display of the user interaction interface.

[0037] A first user interaction interface and a second user interaction interface are respectively provided on the surface of the chassis. The first user interaction interface is a real-time monitoring screen for displaying the real-time dynamic image of the automatic winding reel captured by the image acquisition device. The image acquisition device is a camera arranged inside the chassis. The camera is aimed at the automatic winding reel and the test wire bundle, and the dynamic image of the automatic winding reel and the test wire bundle is obtained in real time, and is directly displayed on the first user interaction interface for the staff to view.

[0038] The second user interaction interface communicates and interacts with the main controller. The specific working method is: the image acquisition device collects real-time dynamic image data of the automatic winding reel and the test wire bundle and transmits it to the main controller, and the main controller analyzes information such as the status of the automatic winding reel and the test wire bundle, and sends and displays the analyzed data information on the second user interaction interface. The data types displayed on the second interaction interface include the winding status of the test wire bundle, the damage status of the test wire bundle, the rotation speed of the automatic winding reel, and the damage status of the automatic winding reel.

[0039] The first user interaction interface communicates and interacts with the image acquisition device, the image acquisition device communicates and interacts with the main controller, and the second user interaction interface communicates and interacts with the main controller.

[0040] Preferably, a number of permanent magnets and electromagnetic coils are also provided on the inner side of the chassis of the present embodiment, and the position and movement of the automatic winding reel are controlled by a magnetic field. The automatic winding reel is made of magnetic material, and a number of air springs are provided on its bottom and sides respectively. The automatic winding reel is suspended in the chassis of the tester under the joint action of the air springs, permanent magnets and electromagnetic coils, and the controlled ends of the permanent magnets and electromagnetic coils are respectively connected to the main controller and controlled by the main controller. The air spring suspension at the bottom and side of the automatic winding reel provides upward support force and horizontal buffering. When the automatic winding reel generates vibration during operation, the suspension setting can effectively isolate the vibration, so that the main body of the tester is not affected, thereby ensuring the accuracy of the measurement results.

[0041] Preferably, the surface of the automatic winding reel of this embodiment is evenly distributed with a number of vibrators and first state sensing sensors, and a number of second state sensing sensors are arranged in the chassis. The controlled end of the vibrator is connected to the main controller, and the data transmission ends of the first state sensing sensor and the second state sensing sensor are respectively connected to the main controller.

[0042] The first state sensing sensor is used to detect the vibration state of the automatic winding reel, and the second state sensing sensor is used to detect the vibration state of the chassis. The first state sensing sensor and the second state sensing sensor respectively send the detected vibration states to the main controller for analysis. The main controller transmits a signal to the vibrator according to the analysis result, and the vibrator generates vibration according to the received signal to offset the mechanical vibration of the resistance tester when it is working. For example, when it is detected that the automatic winding reel vibrates to the left, the vibrator generates vibration to the right, which offsets the original vibration and actively eliminates vibration interference, thereby meeting the strict requirements of the power industry for high-precision measurement of resistance testers.

[0043] Preferably, the main controller of this embodiment is composed of a multi-layer PCB board, and the circuit is finely layered and partitioned.

[0044] Specifically, the multi-layer PCB board structure includes several PCB layers to meet the functional requirements of the resistance tester, including at least a first PCB layer, a second PCB layer, a third PCB layer and a fourth PCB layer stacked in sequence.

[0045] Among them, the driving circuit and control circuit of the automatic winding reel are separately arranged on the first PCB layer, separated from the layer where the test circuit is located by the ground layer and the power layer, and the various PCB layers are electrically connected through blind holes and buried holes to reduce electromagnetic coupling between layers.

[0046] The second PCB layer includes a ground circuit and is a ground layer.

[0047] The third PCB layer includes a power circuit and is a power layer.

[0048] The test circuit of the test end is arranged on the fourth PCB layer.

[0049] Within each PCB layer, the circuit area is further subdivided according to function. For example, high-power motor driver chips are concentrated in one area and shielding copper foil is set around them to prevent their electromagnetic interference from spreading to other areas, thereby improving the circuit's anti-interference ability.

[0050] Preferably, the connection structures between the automatic wire winding reel and the components of the tester body of this embodiment are all flexible connection methods, specifically, a flexible rubber joint and a spring damper combination structure are set at the installation position of the automatic wire winding reel, and the flexible rubber joint allows relative displacement within a certain range to buffer vibration; and the spring damper provides a variable damping force according to the vibration frequency and amplitude. When the automatic wire winding reel generates vibration during operation, the flexible rubber joint first buffers the high-frequency micro-vibration, and the spring damper further absorbs the low-frequency large-vibration, reducing the transmission of vibration to the tester body and ensuring measurement accuracy.

[0051] Preferably, the components of the motor and main controller of the automatic winding drum of the ground resistance tester for the power pole tower of this embodiment are coated with electromagnetic shielding materials. Specifically, the electromagnetic shielding material is a combination of metal fiber and a highly magnetically conductive polymer matrix. The metal fiber is responsible for conducting the current generated by the electromagnetic interference, and the highly magnetically conductive polymer enhances the absorption and shielding effect of the magnetic field. During the preparation process, the metal fiber is evenly dispersed in the polymer matrix through a mixing process to form a stable composite structure. This composite shielding material is made into a sheet or sleeve, which is used to wrap the motor and key electronic components of the automatic winding device, and is used to achieve efficient shielding of electromagnetic interference of different frequencies and improve the overall shielding performance.

[0052] The ground resistance tester for the power pole tower of the present invention integrates an automatic winding reel, and the test wire bundle can be automatically retracted and released, avoiding the tedious process of manual arrangement. At the same time, the key components such as the automatic winding reel, the test wire bundle, and the main controller are integrated into a portable case to form a more compact and lightweight tightly integrated structure, thereby improving the flexibility and efficiency of the test work; through the application of electromagnetic shielding materials and flexible connection structures, electromagnetic interference and equipment vibration are effectively reduced, and the reliability and safety of the test are further improved; a multi-layer PCB board design is adopted to arrange circuits with different functions in layers, which not only improves the integration and stability of the circuit, but also is conducive to the optimization of heat dissipation and electromagnetic compatibility, and extends the service life of the equipment.

[0053] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A ground resistance tester for a power tower, characterized in that: It comprises a chassis and a test wire harness integrated in the chassis, an automatic winding reel whose winding shaft is made of a flexible composite material, and a main controller; The test wire bundle is wound in the automatic winding reel, and the test end of the test wire bundle is connected to the main controller; The automatic winding reel, whose controlled end is connected to the main controller; The chassis has a first user interaction interface and a second user interaction interface on its surface, and an image acquisition device aimed at the automatic winding reel is arranged inside the chassis; The first user interaction interface communicates and interacts with the image acquisition device, the image acquisition device communicates and interacts with the main controller, and the second user interaction interface communicates and interacts with the main controller.

2. The ground resistance tester for a power tower as claimed in claim 1, characterized in that: A number of permanent magnets and electromagnetic coils are arranged inside the chassis, the automatic winding disc is made of magnetic material, and a number of air springs are arranged at the bottom and sides thereof; The controlled ends of the permanent magnet and the electromagnetic coil are respectively connected to the main controller.

3. The ground resistance tester for a power tower as claimed in claim 1, characterized in that: A number of vibrators and first state sensing sensors are evenly distributed on the surface of the automatic winding reel, and a number of second state sensing sensors are arranged in the chassis; The controlled end of the vibrator is connected to the main controller, and the data transmission ends of the first state sensing sensor and the second state sensing sensor are respectively connected to the main controller.

4. The ground resistance tester for a power tower as claimed in claim 1, characterized in that: The main controller is composed of a multi-layer PCB board.

5. The ground resistance tester for a power tower as claimed in claim 4, characterized in that: The multi-layer PCB board at least comprises a first PCB layer, a second PCB layer, a third PCB layer and a fourth PCB layer which are stacked in sequence; The driving circuit and control circuit of the automatic winding reel are arranged on the first PCB layer; The second PCB layer includes a ground circuit; The third PCB layer includes a power supply circuit; The test circuit of the test end is arranged on the fourth PCB layer.

6. The ground resistance tester for a power tower as claimed in claim 5, characterized in that: The first PCB layer, the second PCB layer, the third PCB layer and the fourth PCB layer of the multi-layer PCB board are electrically connected through blind vias and buried vias.

7. The ground resistance tester for a power tower as claimed in claim 1, characterized in that: A flexible connection structure is used between the components in the chassis.

8. The ground resistance tester for a power tower as claimed in claim 7, characterized in that: The flexible connection structure includes a flexible rubber joint and a spring damper.

9. The ground resistance tester for a power tower as claimed in claim 1, characterized in that: The automatic wire winding reel is equipped with a wire winding controller, and the wire winding controller is used to control the automatic retraction and extension of the test wire bundle.

10. The ground resistance tester for a power tower as claimed in claim 1, characterized in that: The motor of the automatic winding reel and the components of the main controller are coated with electromagnetic shielding materials.

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