An on-line monitoring device for lightning protection grounding resistance in flammable and explosive places

Abstract

The utility model provides an online monitoring device of lightning protection grounding resistance in flammable and explosive place. An online monitoring device of lightning protection grounding resistance in flammable and explosive place comprises a monitoring main body and a sensor, an isolation transformer, a micro-break switch, an AC / DC module, a grounding copper bar, an alternating current lightning protection device, a direct current lightning protection device, a signal lightning protection device, a safety isolation fence, a data input / output module and a 4G DTU data transmission module are installed inside the monitoring main body, the grounding copper bar is arranged below the lower half area component inside the monitoring main body, a display screen is further arranged on the front side of the monitoring main body, and each hanging plate is provided with a gourd hole. The online monitoring device of lightning protection grounding resistance in flammable and explosive place can realize lightning surge protection of the whole link of power supply and data interaction of the monitoring device, avoid lightning breakdown of equipment to cause circuit failure or generate sparks, and reduce explosion and fire risk caused by lightning from the source.

Description

Technical Field

[0001] This utility model relates to the field of lightning protection monitoring technology, and in particular to an online monitoring device for lightning protection grounding resistance in flammable and explosive locations. Background Technology

[0002] In flammable and explosive environments such as petrochemical plants, gas stations, and gas storage facilities, lightning protection grounding systems are core infrastructure for ensuring personnel safety, stable equipment operation, and preventing explosions. Grounding resistance, a key indicator of grounding system performance, directly determines the efficiency of lightning current and static charge discharge. Excessive grounding resistance can easily generate localized high potentials during lightning strikes, leading to risks such as equipment breakdown and spark discharge. In such scenarios, flammable and explosive media such as gasoline vapor and natural gas can trigger explosions or fires upon contact with a spark. Therefore, real-time and accurate monitoring of lightning protection grounding resistance is of irreplaceable safety significance.

[0003] Existing grounding resistance monitoring devices are mostly general-purpose equipment, lacking customized protection for the specific risks of flammable and explosive environments. Most devices only have lightning protection components for a single power supply line, neglecting lightning surge protection for critical links such as DC power supply and data transmission (e.g., RS485 bus). Lightning strikes can easily damage data modules, interrupt signals, or even generate sparks due to circuit breakdown, igniting surrounding flammable and explosive media. Furthermore, the current mainstream grounding resistance monitoring still relies on periodic manual on-site testing, typically monthly or quarterly, which cannot achieve real-time monitoring. If the grounding resistance suddenly exceeds the standard within the testing interval (e.g., due to grounding electrode corrosion or changes in soil moisture), the risk warning opportunity may be missed, leading to safety accidents.

[0004] Furthermore, most devices rely solely on top mounting for fixation, and during long-term operation, vibration and wall deformation can easily cause the devices to shake, which not only affects the stability of the monitoring components but may also cause poor contact due to line vibration, leading to equipment failure.

[0005] Therefore, it is necessary to provide an online monitoring device for lightning protection grounding resistance in flammable and explosive locations to solve the above-mentioned technical problems. Utility Model Content

[0006] This invention provides an online monitoring device for lightning protection grounding resistance in flammable and explosive locations, solving the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides an online monitoring device for lightning protection grounding resistance in flammable and explosive locations, comprising: a monitoring body, wherein the monitoring body is internally equipped with an isolation transformer, a micro-break switch, an AC / DC module, a grounding copper busbar, an AC surge protector, a DC surge protector, a signal surge protector, a safety isolation barrier, a data input / output module and a 4G DTU data transmission module, the grounding copper busbar is correspondingly located below the lower half of the internal components of the monitoring body, and a display screen is provided on the front side of the monitoring body; The mounting plate is provided in multiple parts, all of which are fixedly connected to the back of the monitoring body, and each mounting plate has a gourd hole.

[0008] Preferably, the isolation transformer, data input / output module, wiring terminal, and 4G DTU data transmission module are installed sequentially from left to right in the upper half of the monitoring body, while the micro-break switch, AC surge protector, AC / DC module, DC surge protector, signal surge protector, and safety isolation barrier are installed sequentially from left to right in the lower half of the monitoring body, and the grounding copper busbar is correspondingly located below the components in the lower half of the monitoring body.

[0009] Preferably, the AC surge protector corresponds to the AC power supply line connected to the monitoring entity, the DC surge protector corresponds to the DC power supply line connected to the monitoring entity, and the signal surge protector corresponds to the data transmission line connected to the monitoring entity.

[0010] Preferably, the data input / output module is used to collect and summarize sensor grounding resistance data and sensor device information. The data input / output module signal is connected to the display and is used to transmit the data summarized by the data input / output module to the display screen. The 4G DTU data transmission module is connected to the display screen to remotely upload monitoring data, communication status, device information, and alarm information to the cloud.

[0011] Preferably, the gourd hole on the hanging plate is narrow at the top and wide at the bottom.

[0012] Preferably, the front of the monitoring body is hinged to a cabinet door, a light body is provided on the front of the cabinet door, and the display screen is fixedly installed on the cabinet door.

[0013] Preferably, the bottom of the monitoring body is fixedly provided with two auxiliary support components, including: a support sleeve, a rotating ring, a lead screw, an insert block, and a fixing plate. The fixing plate is provided with fixing bolts, the insert block is inserted into the fixing plate, one end of the lead screw is hinged to the insert block, and the other end is threaded to the rotating ring. The rotating ring is rotatably connected to one end of the support sleeve, and the other end of the support sleeve is hinged to the bottom of the monitoring body. The lead screw slides through the inside of the support sleeve.

[0014] Preferably, when the rotating ring rotates, it can drive the lead screw to slide along the axial direction of the support sleeve, which is used to adjust the distance between the support sleeve and the insertion block.

[0015] Compared with related technologies, the online monitoring device for lightning protection grounding resistance in flammable and explosive locations provided by this utility model has the following beneficial effects: 1. By configuring AC surge protectors, DC surge protectors, and signal surge protectors on AC power supply lines, DC power supply lines, and data transmission lines (such as RS485 bus) respectively, lightning surge protection is achieved across the entire power supply and data interaction link of the monitoring device. This prevents lightning strikes from damaging the equipment and causing circuit failures or sparks, thereby reducing the risk of explosions and fires caused by lightning strikes from the source.

[0016] Second, the data input / output module can collect and summarize grounding resistance data from multiple areas in real time, replacing the traditional periodic manual on-site testing mode. This avoids the problem of missed detection of resistance exceeding the standard due to long testing intervals. Staff can continuously monitor the performance of the grounding system without entering dangerous areas, greatly reducing the risk of manual operation.

[0017] Third, the auxiliary support component adjusts the extension length of the screw by rotating the rotating ring, which can be adapted to different installation heights of the fixed plate and provides auxiliary support for the bottom of the monitoring body. This avoids the problem of long-term shaking caused by relying solely on the hanging plate for fixation. At the same time, the plug-in structure between the plug and the fixed plate facilitates disassembly and maintenance, ensuring the device's installation is firm and improving the convenience of subsequent operation and maintenance. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view structural diagram of the present utility model; Figure 3 This is a three-dimensional structural diagram of the monitoring subject of this utility model; Figure 4 This is a front view structural diagram of the monitoring subject of this utility model; Figure 5 A structural diagram showing the addition of auxiliary support components to the monitoring body of this utility model; Figure 6 This is a schematic diagram of the structure of the auxiliary support component of this utility model.

[0019] The diagram is labeled as follows: 10. Monitoring unit; 101. Cabinet; 102. Isolation transformer; 103. Data input / output module; 104. Terminal block; 105. 4G DTU data transmission module; 106. Miniature circuit breaker; 107. AC surge protector; 108. AC / DC module; 109. DC surge protector; 110. Signal surge protector; 111. Safety barrier; 112. Grounding copper busbar; 113. Waterproof cable connector; 20. Cabinet door; 201. Lamp body; 202. Display screen; 30. Hanging plate; 31. Hoist hole; 40. Auxiliary support assembly; 401. Support sleeve; 4011. Rotating ring; 402. Screw rod; 403. Insert block; 404. Fixing plate; 4041. Fixing bolt. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please refer to the following: Figures 1 to 4 This is one embodiment of the present invention. An online monitoring device for lightning protection grounding resistance in flammable and explosive locations includes: a monitoring body 10, a cabinet door 20, and a mounting plate 30. The cabinet door 20 is movably hinged to the monitoring body 10, and multiple mounting plates 30 are provided, all fixedly connected to the back of the monitoring body 10. The monitoring body 10 is equipped with multiple monitoring components inside, enabling continuous monitoring of the gas station environment. The monitoring body 10 is installed inside the gas station using the mounting plates 30.

[0022] The upper part of the monitoring body 10, from left to right, houses an isolation transformer 102, a data input / output module 103, a terminal block 104, and a 4G DTU data transmission module 105. The lower part of the monitoring body 10, from left to right, houses a miniature circuit breaker 106, an AC surge protector 107, an AC / DC module 108, a DC surge protector 109, a signal surge protector 110, and a safety barrier 111. The lower part of the monitoring body 10 also houses a grounding copper busbar 112, located below the miniature circuit breaker 106, AC surge protector 107, AC / DC module 108, DC surge protector 109, signal surge protector 110, and safety barrier 111. In this online monitoring device, the isolation transformer 102, miniature circuit breaker 106, AC / DC module 108, and grounding copper busbar 112 work together... A safe and stable power supply and grounding system is constructed. The isolation transformer 102 provides electrical isolation and interference immunity between mains power and equipment power supply. The micro-break switch 106 prevents circuit failures through overload and short-circuit protection. The AC / DC module 108 converts AC power to DC power suitable for the equipment. The grounding copper busbar 112 integrates various grounding methods (lightning protection, anti-static, equipment protection, etc.) to achieve equipotential bonding and current discharge. AC surge protectors 107, DC surge protectors 109, and signal surge protectors 110 respectively protect AC power lines, DC power lines, and data transmission lines (such as RS485 bus) from lightning surges, protecting equipment at each stage from overvoltage damage. The data input / output module 103 and 4G... The DTU data transmission module 105 forms the core of data interaction. The former is responsible for collecting and summarizing the resistance data of each monitoring point, processing and distributing it to the local display or subsequent modules, and realizing bidirectional transmission of commands. The latter completes remote data uploading and command reception between the local system and the cloud platform through the 4G network. The terminal block 104 serves as the line connection hub, realizing the standardized adaptation and connection of various power lines and signal lines, reducing the difficulty of construction and maintenance. The safety isolation barrier 111 isolates the signal energy of the explosion hazard area (such as the oil tank area) from the safe area. All components work together to meet the explosion-proof, lightning protection and anti-static requirements of the flammable and explosive environment of the gas station, and ensure the stable operation of the system's real-time monitoring, remote control and fault alarm functions for the grounding resistance of multiple areas.

[0023] Multiple lights 201 are fixedly installed on the front of the cabinet door 20, including operation indicator lights and audible and visual alarm lights. A display screen 202 is fixedly installed on the front of the cabinet door 20 to facilitate staff to intuitively observe monitoring data.

[0024] Multiple mounting plates 30 are provided with gourd holes 31. The gourd holes 31 are narrow at the top and wide at the bottom. When installing the monitoring device, the connector can be inserted into the wider part of the gourd hole 31 first, and then slid to the narrower part for fixation. A certain positional deviation adjustment is allowed, making the installation operation more convenient.

[0025] The working principle of the online monitoring device for lightning protection grounding resistance in flammable and explosive locations provided by this utility model is as follows: The mains power is first connected to the AC surge protector 107 of the monitoring unit 10. Its internal components, such as varistor and gas discharge tube, can quickly absorb the instantaneous high voltage and large current (surge) generated by lightning strikes, preventing the surge from breaking down subsequent circuits. The AC power after surge protection then passes through the miniature circuit breaker 106 (which has overload and short-circuit protection functions). If the circuit current abnormally exceeds the standard, the miniature circuit breaker 106 will automatically disconnect to prevent the line from overheating and causing a fault. The AC power after preliminary protection is connected to the isolation transformer 102, which cuts off the direct electrical connection between the mains power and the internal circuit of the equipment through the electromagnetic isolation principle. This filters the grid interference and prevents external faults from being conducted to the internal circuit. The isolated AC power is then converted by the AC / DC module 108 into DC power adapted to the equipment, which powers the data input / output modules 103 and 4G. The DC power supply for components such as the DTU data transmission module 105 is required; the converted DC power needs to be protected by a DC surge protector 109 to prevent residual surges in the DC link from damaging sensitive electronic components; at the same time, the data transmission lines of the device (such as the RS485 bus connecting the grounding resistance sensor) are connected to the signal surge protector 110 to prevent lightning strikes from entering the data module through the signal lines, ensuring stable data transmission; the grounding terminals of all surge protection components are connected to the grounding copper busbar 112 to achieve equipotential bonding, quickly dissipating surge current to the ground and preventing the generation of local high potentials; The monitoring unit 10 is connected to an external grounding resistance sensor (deployed near the grounding electrode in flammable and explosive locations) via terminal block 104. The data input / output module 103 serves as the core acquisition unit, receiving real-time grounding resistance values ​​from the sensor (e.g., through analog or digital signals) and simultaneously aggregating data from multiple monitoring points (e.g., grounding electrodes in the tank area, fuel dispenser, and power distribution room of a gas station). The data input / output module 103 performs preliminary processing on the acquired resistance data (e.g., filtering and calibration). On one hand, it transmits the data to the display screen 202 on the front cabinet door 20 of the monitoring unit 10, allowing staff to visually view the real-time resistance value and equipment operating status (e.g., whether the power supply is normal). On the other hand, if the resistance value exceeds a preset safety threshold, the light 201 (audible and visual alarm light) on the cabinet door 20 will automatically trigger an alarm, prompting on-site personnel to investigate promptly. 4G The DTU data transmission module 105 is connected to the display screen 202 via a signal connection. It remotely uploads the summarized resistance data, equipment status information, and alarm information (such as whether the surge protector has failed, whether the micro-circuit breaker 106 has tripped, whether the grounding resistance exceeds the set threshold, and whether the communication is normal) to the cloud monitoring platform via the 4G network. At the same time, the cloud platform can send control commands to the device (such as adjusting the acquisition frequency and resetting the device) through the 4G DTU to achieve two-way data interaction. Staff can monitor the performance of the grounding system in real time through the cloud without entering the danger zone and promptly detect resistance exceeding the standard (such as grounding electrode corrosion and resistance increase caused by changes in soil moisture).

[0026] refer to Figure 5 and Figure 6This is a second embodiment of the present invention. Unlike the first embodiment, two auxiliary support components 40 are provided at the bottom of the monitoring body 10. Each auxiliary support component 40 includes: a support sleeve 401, a rotating ring 4011, a lead screw 402, an insert block 403, and a fixing plate 404. The fixing plate 404 is provided with fixing bolts 4041. The insert block 403 is inserted into the fixing plate 404. One end of the lead screw 402 is hinged to the insert block 403, and the other end is threaded to the rotating ring 4011. The rotating ring 4011 is rotatably connected to one end of the support sleeve 401, and the other end of the support sleeve 401 is hinged to the bottom of the monitoring body 10. The lead screw 402 slides through the support sleeve 401. Multiple hanging plates 30 on the back of the monitoring body 10 have gourd-shaped holes 31 that are narrower at the top and wider at the bottom. During installation, the fixing bolts 4041 (or hooks) on the wall are first inserted into the wide end of the gourd holes 31, and then the device is slid downwards to allow the screws to... The narrow end of the bolt allows for fine-tuning of the installation position and enables quick positioning and fixation, avoiding the difficulty of aligning traditional bolts. First, the fixing plate 404 is fixed to a suitable position at the bottom of the wall using the fixing bolt 4041. Then, the rotating ring 4011 of the auxiliary support component 40 is rotated. It is connected to the lead screw 402 by threads. When rotated, the lead screw 402 can slide along the axial direction of the support sleeve 401 (the support sleeve 401 is fixedly hinged to the bottom of the monitoring body 10), thereby adjusting the distance between the support sleeve 401 and the insertion block 403. This allows the insertion block 403 to be accurately inserted into the slot of the fixing plate 404, ultimately forming a triangular stable structure with the top of the hanging plate 30 fixed and the bottom of the auxiliary support component 40 supported. This effectively resists the shaking of the device caused by vibration and wall deformation, avoids poor contact of internal circuits, and ensures stable operation of the monitoring components. If maintenance is required, the auxiliary support component 40 can be disassembled simply by pulling out the insertion block 403, making the operation convenient.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An online monitoring device for lightning protection grounding resistance in flammable and explosive locations, characterized in that, include: The monitoring body (10) is equipped with an isolation transformer (102), a micro-break switch (106), an AC / DC module (108), a wiring terminal (104), a grounding copper busbar (112), an AC surge protector (107), a DC surge protector (109), a signal surge protector (110), a safety isolation barrier (111), a data input / output module (103), and a 4G DTU data transmission module (105). The grounding copper busbar (112) is located below the lower half of the components inside the monitoring body (10). A display screen (202) is installed on the front side of the monitoring body (10). Hanging plate (30), there are multiple hanging plates (30), all of which are fixedly connected to the back of the monitoring body (10), and each hanging plate (30) has a gourd hole (31).

2. The online monitoring device for lightning protection grounding resistance in flammable and explosive locations according to claim 1, characterized in that, The isolation transformer (102), data input / output module (103), wiring terminal (104), and 4G DTU data transmission module (105) are installed in the upper half of the monitoring body (10) from left to right. The micro-break switch (106), AC surge protector (107), AC / DC module (108), DC surge protector (109), signal surge protector (110), and safety isolation barrier (111) are installed in the lower half of the monitoring body (10) from left to right. The grounding copper busbar (112) is located below the components in the lower half of the monitoring body (10).

3. The online monitoring device for lightning protection grounding resistance in flammable and explosive locations according to claim 1, characterized in that, The AC surge protector (107) corresponds to the AC power supply line connected to the monitoring body (10), the DC surge protector (109) corresponds to the DC power supply line connected to the monitoring body (10), and the signal surge protector (110) corresponds to the data transmission line connected to the monitoring body (10).

4. The online monitoring device for lightning protection grounding resistance in flammable and explosive locations according to claim 1, characterized in that, The data input / output module (103) is used to collect and summarize sensor grounding resistance data and sensor equipment information. The data input / output module (103) is connected to the display screen (202) to transmit the data summarized by the data input / output module (103) to the display screen (202). The 4G DTU data transmission module (105) is connected to the display screen (202) to remotely upload monitoring data, communication status, equipment information, and alarm information to the cloud.

5. The online monitoring device for lightning protection grounding resistance in flammable and explosive locations according to claim 1, characterized in that, The gourd-shaped hole (31) on the hanging plate (30) is narrow at the top and wide at the bottom.

6. The online monitoring device for lightning protection grounding resistance in flammable and explosive locations according to claim 1, characterized in that, The front of the monitoring body (10) is hinged to a cabinet door (20), and a lamp body (201) is provided on the front of the cabinet door (20). The display screen (202) is fixedly installed on the cabinet door (20).

7. The online monitoring device for lightning protection grounding resistance in flammable and explosive locations according to claim 1, characterized in that, The bottom of the monitoring body (10) is fixedly provided with two auxiliary support components (40), including: a support sleeve (401), a rotating ring (4011), a lead screw (402), an insert block (403), and a fixing plate (404). The fixing plate (404) is provided with fixing bolts (4041). The insert block (403) is inserted into the fixing plate (404). One end of the lead screw (402) is hinged to the insert block (403), and the other end is threaded to the rotating ring (4011). The rotating ring (4011) is rotatably connected to one end of the support sleeve (401). The other end of the support sleeve (401) is hinged to the bottom of the monitoring body (10). The lead screw (402) slides through the inside of the support sleeve (401).

8. The online monitoring device for lightning protection grounding resistance in flammable and explosive locations according to claim 7, characterized in that, When the rotating ring (4011) rotates, it can drive the lead screw (402) to slide along the axial direction of the support sleeve (401), which is used to adjust the distance between the support sleeve (401) and the insert block (403).

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