Grounding pin device and grounding control method thereof

Abstract

The invention discloses a grounding pin device and a grounding control method thereof. The grounding pin device comprises a grounding pin, a detection module and a control module, wherein the detection module and the control module are arranged on the grounding pin; the detection module is used for detecting the grounding resistance of the grounding pin; the control module is electrically connected with the grounding wire, the grounding pin and the detection module. The control module is used for obtaining the grounding resistance detected by the detection module and controlling the connection state of the grounding wire and the grounding pin according to the grounding resistance. According to the technical scheme, the problem that a traditional grounding pin cannot automatically detect the grounding resistance is solved, and the safety and the operation efficiency of electric power operation are improved.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a grounding pin device and its grounding control method. Background Technology

[0002] During the maintenance and operation of power systems, grounding pins are devices that ensure the safety of personnel and equipment. They quickly conduct fault currents from equipment casings, conductors, etc., to the ground, preventing electric shock accidents caused by energized equipment. Grounding resistance is a key indicator of grounding effectiveness. The value of the grounding resistance directly affects the efficiency of fault current release. If the grounding resistance is too high, the fault current cannot be conducted to the ground in a timely manner, causing the potential of the equipment casing or conductors to rise above the ground potential, exceeding the safety threshold and creating a safety hazard.

[0003] The existing technology for measuring the grounding resistance of grounding pins has obvious drawbacks: after the grounding pin is installed, the resistance value needs to be measured by an external grounding resistance tester, which is cumbersome; whether the grounding resistance meets the grounding conditions needs to be judged manually, which poses a risk of misjudgment and increases the workload; even if the measurement finds that the grounding resistance exceeds the standard, the operator can still forcibly install the grounding wire, which poses a safety hazard and seriously threatens the safety of power operations. Summary of the Invention

[0004] This invention provides a grounding pin device and its grounding control method, which solves the problem that traditional grounding pins cannot automatically detect grounding resistance, thereby improving the safety and operational efficiency of power operations.

[0005] In a first aspect, the present invention provides a grounding pin device, comprising: a grounding pin, and a detection module and a control module disposed on the grounding pin; The detection module is used to detect the grounding resistance of the grounding pin; The control module is electrically connected to the grounding wire, the grounding pin, and the detection module respectively; the control module is used to obtain the grounding resistance detected by the detection module, and control the connection state of the grounding wire and the grounding pin according to the grounding resistance.

[0006] Optionally, the grounding needle includes a needle head and a needle body; a first end of the needle body is connected to the needle head, and a second end of the needle body is a needle tip; the diameter of the needle head is larger than the diameter of the needle body; the control module and the detection module are both disposed on the needle body.

[0007] Optionally, the detection module includes multiple measuring electrodes and detection circuits; Multiple measuring electrodes are located on the needle body and arranged sequentially along the axial direction of the needle body; the distance L between each measuring electrode and the needle tip ranges from 0 to 0.6 m. The detection circuit is electrically connected to each of the measuring electrodes; the detection circuit is used to obtain the voltage and current between any two of the measuring electrodes, and to determine the grounding resistance of the grounding pin based on the voltage and current between each of the measuring electrodes.

[0008] Optionally, the control module includes a microcontroller and a locking mechanism; The microcontroller is electrically connected to the control terminals of the detection circuit and the locking mechanism, respectively; the first end of the locking mechanism is electrically connected to the grounding pin, and the second end of the locking mechanism is electrically connected to the grounding wire; the microcontroller is used to obtain the grounding resistance detected by the detection module, and control the on / off state of the first end and the second end of the locking mechanism according to the grounding resistance.

[0009] Optionally, the grounding pin device may also include: a power module; The power module is electrically connected to both the detection module and the control module; the power module is used to provide power signals to both the detection module and the control module.

[0010] Optionally, the grounding pin device may also include: a status indication module; The control module is also connected to the status indication module; the control module is also used to control the indication status of the status indication module according to the grounding resistance.

[0011] Optionally, the status indication module includes at least two indicator lights; each indicator light emits a different color. The control module is also electrically connected to each of the indicator lights; the control module is used to control the lighting state of each indicator light according to the grounding resistance.

[0012] Optionally, the status indication module includes an alarm; The control module is also connected to the alarm; the control module is used to control the alarm status of the alarm based on the grounding resistance.

[0013] Secondly, the present invention also provides a grounding control method for a grounding pin device, comprising: The grounding resistance of the grounding pin is obtained based on the detection module; The control module controls the connection state between the grounding wire and the grounding pin based on the grounding resistance.

[0014] Optionally, the control module controls the connection state between the grounding wire and the grounding pin based on the grounding resistance, including: When the grounding resistance is less than or equal to the preset resistance, the control module controls the grounding wire and the grounding pin to be in a conductive state. When the grounding resistance is greater than the preset resistance, the control module controls the grounding wire to be disconnected from the grounding pin.

[0015] Optionally, the grounding pin device further includes a status indicator module; the status indicator module includes multiple indicator lights; each indicator light emits a different color; the control module is also electrically connected to each of the indicator lights respectively; When the grounding resistance is less than or equal to the preset resistance, the control module controls the indicator light with the first color to be in the lit state, and controls the indicator lights with other colors to be in the non-lit state. When the grounding resistance is greater than the preset resistance, the control module controls the indicator light with the second color to be in the lit state, and controls the indicator lights with other colors to be in the non-lit state.

[0016] The technical solution of this invention solves the problem that traditional grounding pins cannot automatically detect grounding resistance by setting a detection module and a control module on the grounding pin, and the control module is electrically connected to the grounding wire, the grounding pin and the detection module respectively. The detection module can detect the grounding resistance of the grounding pin, so that the control module can control the connection state between the grounding wire and the grounding pin according to the grounding resistance. This improves the safety and operational efficiency of power operations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a grounding pin device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of another grounding pin device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of another grounding pin device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of another grounding pin device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of another grounding pin device provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of another grounding pin device provided in an embodiment of the present invention; Figure 7 This is a schematic flowchart of a grounding control method for a grounding pin device provided in an embodiment of the present invention; Figure 8 This is a schematic flowchart of another grounding control method for a grounding pin device provided in an embodiment of the present invention. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0019] The terminology used in the embodiments of this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. It should be noted that directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this invention are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this invention. Furthermore, in the context, it should be understood that when referring to an element being formed "on" or "below" another element, it can be formed not only directly on or below the other element, but also indirectly on or below it through intermediate elements. The terms "first," "second," etc., are used for descriptive purposes only and do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The term "comprising" and its variations as used in this invention are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment".

[0021] It should be noted that the concepts of "first" and "second" mentioned in this invention are only used to distinguish the corresponding contents and are not used to limit the order or interdependence.

[0022] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0023] Figure 1 This is a schematic diagram of a grounding pin device provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of another grounding pin device provided in an embodiment of the present invention, for reference. Figure 1 and Figure 2 The grounding pin device includes a grounding pin 10, a detection module 20 and a control module 30 disposed on the grounding pin 10; the detection module 20 is used to detect the grounding resistance of the grounding pin 10; the control module 30 is electrically connected to the grounding wire 40, the grounding pin 10 and the detection module 20 respectively; the control module 30 is used to obtain the grounding resistance detected by the detection module 20 and control the connection state between the grounding wire 40 and the grounding pin 10 according to the grounding resistance.

[0024] The grounding pin 10 can be inserted vertically into the ground. One end of the grounding wire 40 can be connected to the grounding pin 10, and the other end of the grounding wire 40 is connected to the grounding rod 70. The operator can hold the grounding rod 70 and suspend it on the bare conductor of the high-voltage line 80 to form a grounding loop consisting of the high-voltage line 80, the grounding rod 70, the grounding wire 40, the grounding pin 10, and the ground. The high-voltage line 80 can be electrically connected to electrical equipment, which can conduct fault currents, static electricity, or excess charge from lightning strikes that may occur during the operation of the high-voltage line 80 or electrical equipment into the ground to prevent safety accidents such as electric shock, equipment damage, or fire. After the grounding pin 10 is inserted into the ground, it forms a grounding resistance with the soil. The detection module 20 can detect the grounding resistance of the grounding pin 10. For example, multiple measuring electrodes 21 can be used to detect the grounding resistance of the grounding pin 10, or current and voltage sensors can be used to obtain current and voltage respectively, thereby detecting the grounding resistance of the grounding pin 10. When electrical equipment becomes accidentally energized, the value of the grounding resistance affects the efficiency of fault current release. If the grounding resistance is too high, the fault current cannot be conducted to the ground in time, causing the voltage between the equipment casing and ground to exceed the safety threshold, thus creating a safety hazard. For example, for a 10kV power system, the grounding resistance of grounding pin 10 should be less than or equal to 4Ω.

[0025] The control module 30 is electrically connected to the detection module 20 and is used to acquire the grounding resistance detected by the detection module 20. The control module 30 is also electrically connected to the grounding wire 40 and the grounding pin 10 respectively, and is used to control the connection state of the grounding wire 40 and the grounding pin 10 according to the grounding resistance. In an exemplary embodiment, when the resistance value meets the grounding conditions, the control module 30 controls the connection between the grounding wire 40 and the terminal of the grounding pin 10 to achieve effective grounding; when the resistance value does not meet the grounding conditions, the control module 30 controls the disconnection of the connection channel between the grounding wire 40 and the terminal of the grounding pin 10, so that the grounding wire 40 cannot be grounded, avoiding safety hazards.

[0026] This embodiment solves the problem that traditional grounding pins cannot automatically detect grounding resistance by setting a detection module and a control module on the grounding pin, and the control module is electrically connected to the grounding wire, the grounding pin and the detection module respectively. The detection module can detect the grounding resistance of the grounding pin, so that the control module can control the connection state between the grounding wire and the grounding pin according to the grounding resistance. This improves the safety and operational efficiency of power operations.

[0027] Optional, continue to refer to Figure 1 The grounding needle 10 includes a needle head 11 and a needle body 12; the first end of the needle body 12 is connected to the needle head 11, and the second end of the needle body 12 is a needle tip 121; the diameter of the needle head 11 is larger than the diameter of the needle body 12; the control module 30 and the detection module 20 are both disposed on the needle body 12.

[0028] The first end of the needle body 12 is connected to the needle head 11, which can be welded to the upper end of the needle body 12. The needle head 11 can be hexagonal in shape and 60mm in diameter, facilitating the use of tools such as hammers to drive the grounding needle device into the ground. The second end of the needle body 12 is a needle tip 121, which facilitates the insertion of the grounding needle device into the ground. The needle body 12 can be made of galvanized round steel with a diameter of 20mm and a length of 1.5m. The diameter of the needle head 11 is larger than that of the needle body 12, enhancing the contact stability between the grounding needle device and the soil.

[0029] Optional, Figure 3 This is a schematic diagram of another grounding pin device provided in an embodiment of the present invention, for reference. Figure 3 The detection module 20 includes multiple measuring electrodes 21 and a detection circuit 22. The multiple measuring electrodes 21 are located on the needle body 12 and are arranged sequentially along the axial direction of the needle body 12. The distance L between each measuring electrode 21 and the needle tip 121 is in the range of 0≤L≤0.6m. The detection circuit 22 is electrically connected to each measuring electrode 21. The detection circuit 22 is used to obtain the voltage and current between any two measuring electrodes 21 and determine the grounding resistance of the grounding needle 10 based on the voltage and current between each measuring electrode 21.

[0030] Multiple measuring electrodes 21 are located on the needle body 12 and arranged sequentially along the axial direction of the needle body 12. The multiple measuring electrodes 21 are isolated by insulating material. When the grounding needle 10 is not inserted into the ground, the contacts of the multiple measuring electrodes 21 are exposed to the air. When the grounding needle 10 is inserted into the ground, the contacts of each measuring electrode 21 come into contact with the soil, thereby enabling the measurement of the grounding resistance of the grounding needle 10.

[0031] For example, the detection module 20 may include four equally spaced measuring electrodes: a first measuring electrode 211, a second measuring electrode 212, a third measuring electrode 213, and a fourth measuring electrode 214. The resistivity of the soil can be calculated using the four-electrode method. The formula for calculating the resistivity of soil using the four-electrode method is: Where ρ is the soil resistivity; a is the distance between two adjacent measuring electrodes 21; U is the voltage between the second measuring electrode 212 and the third measuring electrode 213; and I is the current between the first measuring electrode 211 and the fourth measuring electrode 214. After calculating the soil resistivity using the four-electrode method, and combining parameters such as the material and cross-sectional area of ​​the measuring electrodes 21, the grounding resistance of the grounding pin 10 can be determined. The detection circuit 22 can also include a high-precision operational amplifier to achieve resistance measurement in the range of 0~10Ω with an accuracy of ±0.1Ω.

[0032] Optional, Figure 4This is a schematic diagram of another grounding pin device provided in an embodiment of the present invention, for reference. Figure 4 The control module 30 includes a microcontroller 31 and a locking mechanism 32. The microcontroller 31 is electrically connected to the control terminals of the detection circuit 22 and the locking mechanism 32, respectively. The first end of the locking mechanism 32 is electrically connected to the grounding pin 10, and the second end of the locking mechanism is electrically connected to the grounding wire 40. The microcontroller 31 is used to obtain the grounding resistance detected by the detection module 20 and control the on / off state of the first and second ends of the locking mechanism 32 according to the grounding resistance.

[0033] The microcontroller 31 is electrically connected to the detection circuit 22 and is used to acquire the grounding resistance detected by the detection module 20. Based on the resistance value, the microcontroller 31 sends an electrical signal to the control terminal of the locking mechanism 32. The first end of the locking mechanism 32 is electrically connected to the grounding pin 10, and the second end is electrically connected to the grounding wire 40. The locking mechanism 32 can be controlled by an electromagnetic lock structure. The connection end of the grounding wire 40 can be designed as a fork-shaped terminal with a lock hole. The electromagnetic lock core of the locking mechanism 32 is adapted to the lock hole. When the grounding resistance value meets the grounding conditions, the electromagnetic lock core is energized and engaged, and the first and second ends of the locking mechanism 32 are connected. When the grounding resistance value does not meet the grounding conditions, the electromagnetic lock core is de-energized and locked, and the first and second ends of the locking mechanism 32 are disconnected. For example, in a 10kV power system, when the grounding resistance is less than or equal to 4Ω, the grounding condition is met. The microcontroller 31 sends a high-level signal to the interlocking mechanism 32, controlling the first and second terminals of the interlocking mechanism 32 to conduct, meaning the grounding wire 40 is connected to the ground, forming a grounding loop. When the grounding resistance is greater than 4Ω, the grounding condition is not met. The microcontroller 31 sends a low-level signal to the interlocking mechanism 32, controlling the first and second terminals of the interlocking mechanism 32 to disconnect, meaning the grounding wire 40 cannot be connected to the ground. By acquiring the grounding resistance detected by the detection module 20 through the microcontroller 31, the interlocking mechanism 32 achieves physical interlocking through an electromagnetic lock structure. The grounding wire 40 is only allowed to be installed when the grounding resistance is qualified, thus eliminating the safety hazard of poor grounding from the source.

[0034] Optional, Figure 5 This is a schematic diagram of another grounding pin device provided in an embodiment of the present invention, for reference. Figure 5 The grounding pin device also includes a power module 50; the power module 50 is electrically connected to the detection module 20 and the control module 30 respectively; the power module 50 is used to provide power signals to the detection module 20 and the control module 30 respectively.

[0035] The power module 50 can be powered by a lithium battery to provide power to the detection module 20 and the control module 30. The power module 50 is equipped with a charging interface, supports USB-C charging, and can work continuously for more than 8 hours and standby for more than 30 days.

[0036] Optional, Figure 6 This is a schematic diagram of another grounding pin device provided in an embodiment of the present invention, for reference. Figure 6 The grounding pin device also includes a status indication module 60; the control module 30 is also connected to the status indication module 60; the control module 30 is also used to control the indication status of the status indication module 60 according to the grounding resistance.

[0037] The control module 30 is also connected to the status indication module 60. The control module 30 is used to determine whether the grounding resistance meets the grounding requirements based on the grounding resistance detected by the detection module 20. If the resistance value meets the grounding conditions, the control module 30 sends a normal indication status electrical signal to the status indication module 60. If the resistance value does not meet the grounding conditions, the control module 30 sends an abnormal indication status electrical signal to the status indication module 60.

[0038] Optional, continue to refer to Figure 6 The status indicator module 60 includes at least two indicator lights; each indicator light emits a different color; the control module 30 is also electrically connected to each indicator light; the control module 30 is used to control the illumination state of each indicator light according to the grounding resistance.

[0039] In this embodiment, the indicator lights in the status indication module 60 emit different colors, allowing operators to quickly determine whether the grounding conditions are met through color differences. This embodiment does not specifically limit the color of the indicator lights. This embodiment uses a first indicator light and a second indicator light as examples. For instance, the first indicator light can emit green light, and the second indicator light can emit red light. For a 10kV power system, when the grounding resistance is less than or equal to 4Ω, the grounding resistance meets the grounding conditions, and the control module 30 controls the first indicator light to emit green light, indicating to the operator that the grounding is effective. When the grounding resistance is greater than 4Ω, the grounding resistance does not meet the grounding conditions, and the control module 30 controls the second indicator light to emit red light, indicating to the operator that the grounding resistance is too high and the grounding is ineffective.

[0040] Optionally, the status indication module 60 may also include an alarm; the control module 30 is also connected to the alarm; the control module 30 is used to control the alarm status of the alarm based on the grounding resistance.

[0041] When the grounding resistance value does not meet the grounding conditions, the control module 30 controls the alarm to sound, prompting the operator to take timely measures, such as changing the grounding location or improving the grounding environment.

[0042] Based on the same inventive concept, embodiments of the present invention also provide a grounding control method for a grounding pin device, used to control the grounding pin device provided in any embodiment of the present invention. Figure 7 This is a schematic flowchart of a grounding control method for a grounding pin device provided in an embodiment of the present invention. (Refer to...) Figure 7 The grounding control method for the grounding pin device includes: S110. Obtain the grounding resistance of the grounding pin based on the detection module.

[0043] Specifically, the operator drives the grounding pin vertically into the ground to a depth greater than or equal to 0.6m, ensuring that all measuring electrodes 21 are inserted into the ground. The grounding pin device is then automatically powered on and started. The detection module 20 can obtain the grounding resistance of the grounding pin 10 based on each measuring electrode 21. The measurement method can utilize the four-electrode method.

[0044] S120: The control module controls the connection status between the grounding wire and the grounding pin based on the grounding resistance.

[0045] Specifically, the control module 30 determines whether the resistance value of the grounding resistance meets the grounding requirements based on the grounding resistance, and then controls the connection state between the grounding wire 40 and the grounding pin 10. The connection state between the grounding wire 40 and the grounding pin 10 can include a conducting state and a disconnected state.

[0046] In an alternative embodiment, Figure 8 This is a schematic flowchart of another grounding control method for a grounding pin device provided in an embodiment of the present invention. This embodiment, based on the above embodiment, provides a detailed description of the connection state between the grounding wire and the grounding pin. (Refer to...) Figure 8 The grounding control method for the grounding pin device includes: S210. Obtain the grounding resistance of the grounding pin based on the detection module.

[0047] S220: When the grounding resistance is less than or equal to the preset resistance, the control module controls the grounding wire and the grounding pin to be in a conductive state.

[0048] For example, in a 10kV power system, when the grounding resistance is less than or equal to 4Ω, the grounding resistance meets the grounding conditions, and the grounding wire 40 and the grounding pin 10 are in a conductive state, that is, the grounding wire 40 is connected to the earth, forming a grounding loop.

[0049] S230: When the grounding resistance is greater than the preset resistance, the control module controls the grounding wire and the grounding pin to be disconnected.

[0050] For example, in a 10kV power system, when the grounding resistance is greater than 4Ω, the grounding resistance does not meet the grounding conditions, and the grounding wire 40 is disconnected from the grounding pin 10, that is, the grounding wire 40 cannot be connected to the earth.

[0051] Optionally, the grounding pin device also includes a status indicator module 60; the status indicator module 60 includes multiple indicator lights; each indicator light emits a different color; the control module 30 is also electrically connected to each indicator light; when the grounding resistance is less than or equal to a preset resistance, the control module 30 controls the indicator light with the first color to be in the lit state, and controls the indicator lights with other colors to be in the non-lit state; when the grounding resistance is greater than the preset resistance, the control module 30 controls the indicator light with the second color to be in the lit state, and controls the indicator lights with other colors to be in the non-lit state.

[0052] Specifically, the indicator lights in the status indication module 60 emit different colors, allowing operators to quickly determine whether the grounding conditions are met through color differences. This embodiment of the invention does not specifically limit the color of the indicator lights. This embodiment uses a first indicator light and a second indicator light as examples. For instance, the first indicator light can emit green light, and the second indicator light can emit red light. For a 10kV power system, when the grounding resistance is less than or equal to 4Ω, the grounding resistance meets the grounding conditions. The control module 30 controls the first indicator light to emit green light, and the second indicator light remains off, indicating to the operator that the grounding is effective. When the grounding resistance is greater than 4Ω, the grounding resistance does not meet the grounding conditions. The control module 30 controls the second indicator light to emit red light, and the first indicator light remains off, indicating to the operator that the grounding resistance is too high and the grounding is ineffective.

[0053] This embodiment detects the grounding resistance of the grounding pin, thereby controlling the grounding wire and the grounding pin to be in a conductive or disconnected state. An indicator light is used to indicate the working status of the grounding pin device to the operator. This achieves automatic detection of grounding resistance and automatic control of grounding wire installation, allowing operators to intuitively and quickly understand the grounding status of the grounding pin device, thus improving the safety and operational efficiency of power operations.

[0054] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A grounding pin device, characterized in that, include: A grounding pin, and a detection module and a control module disposed on the grounding pin; The detection module is used to detect the grounding resistance of the grounding pin; The control module is electrically connected to the grounding wire, the grounding pin, and the detection module respectively; the control module is used to obtain the grounding resistance detected by the detection module, and control the connection state of the grounding wire and the grounding pin according to the grounding resistance.

2. The grounding pin device according to claim 1, characterized in that, The grounding needle includes a needle head and a needle body; the first end of the needle body is connected to the needle head, and the second end of the needle body is a needle tip; the diameter of the needle head is larger than the diameter of the needle body; the control module and the detection module are both disposed on the needle body.

3. The grounding pin device according to claim 2, characterized in that, The detection module includes multiple measuring electrodes and detection circuits; Multiple measuring electrodes are located on the needle body and arranged sequentially along the axial direction of the needle body; the distance L between each measuring electrode and the needle tip ranges from 0 to 0.6 m. The detection circuit is electrically connected to each of the measuring electrodes; the detection circuit is used to obtain the voltage and current between any two of the measuring electrodes, and to determine the grounding resistance of the grounding pin based on the voltage and current between each of the measuring electrodes.

4. The grounding pin device according to claim 1, characterized in that, The control module includes a microcontroller and a locking mechanism; The microcontroller is electrically connected to the control terminals of the detection circuit and the locking mechanism, respectively; the first end of the locking mechanism is electrically connected to the grounding pin, and the second end of the locking mechanism is electrically connected to the grounding wire; the microcontroller is used to obtain the grounding resistance detected by the detection module, and control the on / off state of the first end and the second end of the locking mechanism according to the grounding resistance.

5. The grounding pin device according to claim 1, characterized in that, Also includes: Power module; The power module is electrically connected to both the detection module and the control module; the power module is used to provide power signals to both the detection module and the control module.

6. The grounding pin device according to claim 1, characterized in that, Also includes: Status indicator module; The control module is also connected to the status indication module; the control module is also used to control the indication status of the status indication module according to the grounding resistance.

7. The grounding pin device according to claim 6, characterized in that, The status indication module includes at least two indicator lights; each indicator light emits a different color. The control module is also electrically connected to each of the indicator lights; the control module is used to control the lighting state of each indicator light according to the grounding resistance.

8. The grounding pin device according to claim 6, characterized in that, The status indication module includes an alarm; The control module is also connected to the alarm; the control module is used to control the alarm status of the alarm based on the grounding resistance.

9. A grounding control method applied to the grounding pin device according to any one of claims 1-8, characterized in that, include: The grounding resistance of the grounding pin is obtained based on the detection module; The control module controls the connection state between the grounding wire and the grounding pin based on the grounding resistance.

10. The grounding control method for the grounding pin device according to claim 9, characterized in that, The control module controls the connection state between the grounding wire and the grounding pin based on the grounding resistance, including: When the grounding resistance is less than or equal to the preset resistance, the control module controls the grounding wire and the grounding pin to be in a conductive state. When the grounding resistance is greater than the preset resistance, the control module controls the grounding wire to be disconnected from the grounding pin.

11. The grounding control method for the grounding pin device according to claim 9, characterized in that, The grounding pin device also includes a status indicator module; the status indicator module includes multiple indicator lights; each indicator light emits a different color; the control module is also electrically connected to each of the indicator lights. When the grounding resistance is less than or equal to the preset resistance, the control module controls the indicator light with the first color to be in the lit state, and controls the indicator lights with other colors to be in the non-lit state. When the grounding resistance is greater than the preset resistance, the control module controls the indicator light with the second color to be in the lit state, and controls the indicator lights with other colors to be in the non-lit state.

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