Urban building lightning protection detection device

Abstract

The invention belongs to the technical field of lightning protection detection equipment, and particularly relates to an urban building lightning protection detection device, which comprises a grounding megger main body, a megger E terminal wire, a megger P terminal wire, a megger C terminal wire and two conductive insertion rods, the bottom end of the grounding megger main body is fixedly connected with a hollow box, the bottom end of the hollow box is hermetically connected with a bottom cover, and the bottom cover is fixedly connected with the grounding megger main body. The bottom cover is fixedly connected with the outer wall of the bottom end of the hollow box through bolts. The urban building lightning protection detection device not only has the function of quickly cleaning the surface of a grounding resistance test point, but also has the functions of damage detection and convenient winding and unwinding of the megger E terminal wire, the megger P terminal wire and the megger C terminal wire, so that the accuracy of the detection result of the lightning protection detection device can be ensured; and the reliability and convenience of use of the lightning protection detection device are also improved, the hidden danger of lightning stroke buried in a building is avoided, the safety of personnel and equipment in the building can be ensured, and the detection intensity of workers is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of lightning protection detection equipment, and in particular relates to a lightning protection detection device for urban buildings. Background Art

[0002] It is of great significance to carry out lightning protection inspections on urban buildings on a regular basis. Through professional and meticulous lightning protection inspections, various potential hidden dangers in lightning protection devices can be accurately identified, such as damage to lightning rods, poor grounding systems, etc. Once discovered, they can be rectified and repaired in a timely manner. In this way, the probability of buildings being struck by lightning will be significantly reduced, effectively ensuring that various systems such as the electrical system and communication network inside the building can still operate stably in severe weather with thunder and lightning, ensuring the orderly conduct of urban life and the normal maintenance of production order. Lightning protection inspections for urban buildings require the use of lightning protection detection devices. For example, the patent authorization announcement number is CN218331783U, which discloses a lightning protection detection device for urban buildings.

[0003] The existing building lightning protection detection device usually includes a grounding megohmmeter, a megohmmeter E terminal wire, a 20-meter-long megohmmeter P terminal wire, a 40-meter-long megohmmeter C terminal wire and two conductive plugs. In the actual operation of the device, since these wires are long, the staff have to put them away one by one before and after use. This process is extremely cumbersome, which seriously affects the convenience of the device, reduces the efficiency of lightning protection detection, and also greatly increases the detection intensity of the staff; In addition, multiple retraction and release make the conductive core at the bend of the wire extremely easy to be damaged by stress, which may cause cracks or even breakage, resulting in poor contact of the lightning protection detection line. This will cause many adverse effects on the detection work of the ground megohmmeter. On the one hand, the current transmission is blocked, and the resistance value measured by the ground megohmmeter is distorted, which cannot truthfully reflect the grounding condition of the lightning protection device. On the other hand, the detection data fluctuates violently and is unstable, making it difficult to accurately judge the effectiveness of the lightning protection facilities, ultimately resulting in a significant reduction in the accuracy of the detection results, burying hidden dangers of lightning strikes in buildings, endangering the safety of internal personnel and equipment, and weakening the reliability of the device.

[0004] Therefore, a lightning protection detection device for urban buildings is proposed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a lightning protection detection device for urban buildings in view of the above problems.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a lightning protection detection device for urban buildings, comprising a ground megohmmeter body, a megohmmeter E terminal wire, a megohmmeter P terminal wire, a megohmmeter C terminal wire and two conductive plug rods, the bottom end of the ground megohmmeter body is fixedly connected with a hollow box, the bottom end of the hollow box is sealed with a bottom cover, the bottom cover is fixedly connected to the outer wall of the bottom end of the hollow box by bolts, the inner wall of the hollow box is fixedly connected with a connecting strip, the bottom end of the connecting strip contacts the inner wall of the bottom cover, the outer wall of the connecting strip is fixedly connected with a double-headed motor, the side wall of the hollow box is provided with a through hole, and the hole wall of the through hole is connected with a rotating tube through a rolling bearing, and the side end of the rotating tube located inside the hollow box is fixedly connected with the connecting end of the double-headed motor through a coupling; The end of the double-headed motor away from the rotating tube is fixedly connected with a cleaning mechanism for cleaning the test points of the lightning protection facilities of urban buildings; The outer end of the rotating tube is fixedly connected to a multi-channel conductive slip ring, and the outer wall of the rotating tube is sleeved with three retracting mechanisms for retracting and releasing the megohmmeter E terminal wire, the megohmmeter P terminal wire and the megohmmeter C terminal wire respectively; The outer walls of the megohmmeter E terminal wire, the megohmmeter P terminal wire and the megohmmeter C terminal wire are all movably sleeved with a damage detection mechanism for conductive core detection, and the outer wall of the hollow box is provided with a plurality of installation through holes that match the damage detection mechanism; The inner wall of the hollow box is fixedly connected with a control mechanism.

[0007] In the above-mentioned urban building lightning protection detection device, the debris removal mechanism includes a rubber rod, a through hole is opened on the side wall of the hollow box, and the hole wall of the through hole is fixedly connected with a connecting bearing for limiting the rubber rod, the side end of the rubber rod is fixedly connected to the side end of the double-headed motor, and the end of the rubber rod away from the double-headed motor is fixedly connected with a hard rod, the rod wall of the hard rod is connected with a grip sleeve through a rolling bearing, the outer end of the hard rod is fixedly connected with a cleaning brush sleeve, and the outer wall of the hollow box is fixedly connected with a C-shaped elastic clamp for clamping the grip sleeve.

[0008] In the above-mentioned urban building lightning protection detection device, the three reeling mechanisms each include two rotating bearings fixedly sleeved with the outer wall of the rotating tube, the outer walls of the two rotating bearings are jointly sleeved with a metal reeling wheel, the outer wall of the rotating tube is embedded with a conductive strip, the side end of the conductive strip is in active contact with the inner wall of the metal reeling wheel, the outer wall of the metal reeling wheel is fixedly sleeved with a limiting internal gear ring, the tube wall of the rotating tube is fixedly embedded with a micro electric push rod, the moving end of the micro electric push rod is fixedly connected with a tooth block meshing with the limiting internal gear ring, and the inner wall of the bottom cover is fixedly connected with an arc-shaped rubber damping block used for positioning the reeling mechanism.

[0009] In the above-mentioned urban building lightning protection detection device, the connection ends of the three conductive strips located on the inner side of the rotating tube are electrically connected to the connection ends of the multi-channel conductive slip ring through wires, and the ends of the megohmmeter E terminal wire, the megohmmeter P terminal wire and the megohmmeter C terminal wire close to the rotating tube are respectively electrically connected to the outer walls of the three metal winding wheels, and the outer walls of the three metal winding wheels are respectively fixedly connected with limit sleeves for positioning the megohmmeter E terminal wire, the megohmmeter P terminal wire and the megohmmeter C terminal wire.

[0010] In the above-mentioned urban building lightning protection detection device, an L-shaped plate is fixedly sleeved on the outer wall of the multi-channel conductive slip ring, and the side end of the L-shaped plate is fixedly connected to the outer wall of the hollow box. The three conductive wires of the multi-channel conductive slip ring electrically connected to the three conductive strips are respectively electrically connected to the E-connection terminal, the P-connection terminal and the C-connection terminal of the grounding megohmmeter body.

[0011] In the above-mentioned urban building lightning protection detection device, the damage detection mechanism includes a detection tube fixedly connected to the hollow box, a threading hole is opened at the center of the detection tube, a magnetic field sensor and an AC electromagnet are symmetrically fixedly embedded on the inner wall of the detection tube, a U-shaped wire limit rod is fixedly connected to the inner wall of the detection tube, and an audible and visual alarm is fixedly connected to the outer wall of the detection tube.

[0012] In the above-mentioned urban building lightning protection detection device, the control mechanism includes a PLC controller fixedly connected to the inner wall of the hollow box, a micro inverter for AC power supply to the AC electromagnet is fixedly connected inside the hollow box, a control switch is fixedly embedded at the top of the hollow box, and a lithium battery is fixedly connected to the inner wall of the bottom cover.

[0013] In the above-mentioned urban building lightning protection detection device, the outer walls on both sides of the hollow box are fixedly connected with rubber placement sleeves for limiting the position of the conductive plug rod.

[0014] Compared with the existing technology, the advantages of a lightning protection detection device for urban buildings are: 1. Through the provided cleaning mechanism, control mechanism and ground megohmmeter body, when it is necessary to carry out lightning protection detection on urban buildings, first expose the grounding resistance test point of the urban building lightning protection facility. If it is found that there is too much dust attached to the surface of the grounding resistance test point of the lightning protection facility and there is interference with the reliability of the electrical connection of the megohmmeter E terminal line, the staff puts the cleaning brush cover of the cleaning mechanism close to the surface of the grounding resistance test point of the lightning protection facility, and then controls the cleaning brush cover to rotate through the control mechanism. The rotating cleaning brush cover can quickly remove the dust attached to the surface of the grounding resistance test point of the lightning protection facility, and then the conductive clip at the side end of the megohmmeter E terminal line is clamped and electrically connected with the cleaned grounding resistance test point of the lightning protection facility to avoid the poor contact of the megohmmeter E terminal line due to dust adhesion, and effectively reduce the interference with the lightning protection detection of urban buildings. The mechanism enables the urban building lightning protection detection device to have the function of quickly cleaning the surface of the grounding resistance test point, thereby ensuring the reliability of the electrical connection of the megohmmeter E terminal line in the device, and ensuring the accuracy of the detection result of the lightning protection detection device, and at the same time improving the effect of the use of the detection device.

[0015] 2. Through the winding mechanism and damage detection mechanism, the staff then takes out two conductive rods from the rubber placement sleeve, and electrically connects the two conductive rods to the conductive clips at the side ends of the megohmmeter P terminal wire and the megohmmeter C terminal wire respectively. Then the staff pulls the side ends of the megohmmeter P terminal wire and the megohmmeter C terminal wire outwards. Under the action of tension, the metal winding wheel will rotate and automatically release the wire, so as to achieve the purpose of convenient release of the megohmmeter P terminal wire and the megohmmeter C terminal wire. Moreover, when the megohmmeter E terminal wire, the megohmmeter P terminal wire and the megohmmeter C terminal wire are pulled outwards, the conductive core damage detection can be performed through the damage detection mechanism. After the damage is found, the sound and light alarm will sound and remind the staff to replace it to avoid damage to the conductive core in the C terminal wire of the megohmmeter, which will cause current transmission to be blocked and distort the resistance value detected by the grounding megohmmeter body. On the other hand, it will cause the detection data to fluctuate violently and be unstable, making it difficult to accurately judge the effectiveness of the lightning protection facilities. This mechanism enables the urban building lightning protection detection device to have the function of detecting damage to the megohmmeter E terminal wire, megohmmeter P terminal wire and megohmmeter C terminal wire, which can effectively improve the accuracy of the detection results of the lightning protection detection device and avoid the hidden danger of lightning strikes to the building. At the same time, it ensures the safety of personnel and equipment in the building and improves the reliability of the use of the lightning protection detection device.

[0016] 3. Through the double-headed motor, rotating tube and reeling mechanism, when the lightning protection detection device is inspected, the conductive rod is first removed from the megohmmeter P terminal wire and the megohmmeter C terminal wire, and the conductive rod is inserted into the rubber placement sleeve. Then the staff starts the double-headed motor and the three micro-electric push rods in the reeling mechanism in turn by operating the switch, so that the tooth block is stuck in the tooth groove of the limit inner gear ring, completing the constraint between the metal reeling wheel and the rotating tube, so that the double-headed motor drives the three reeling mechanisms to reel the megohmmeter E terminal wire, the megohmmeter P terminal wire and the megohmmeter C terminal wire respectively through the rotating tube. This mechanism enables the urban building lightning protection detection device to have the function of convenient retraction and release of the megohmmeter E terminal wire, the megohmmeter P terminal wire and the megohmmeter C terminal wire, thereby improving the convenience of using the lightning protection detection device, improving the efficiency of lightning protection detection, and reducing the detection intensity of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a lightning protection detection device for urban buildings provided by the present invention, viewed from above; Figure 2 It is a structural schematic diagram of a lightning protection detection device for urban buildings provided by the present invention; Figure 3 It is a structural schematic diagram of a reeling mechanism in a lightning protection detection device for urban buildings provided by the present invention; Figure 4 It is a partially enlarged structural schematic diagram of a lightning protection detection device for urban buildings provided by the present invention; Figure 5 It is a structural schematic diagram of a damage detection mechanism in a lightning protection detection device for urban buildings provided by the present invention; Figure 6 The present invention is a schematic structural diagram of a side view of a limiting inner gear ring portion in a lightning protection detection device for urban buildings provided by the present invention.

[0018] In the figure: 1 grounding megohmmeter body, 2 megohmmeter E terminal wire, 3 megohmmeter P terminal wire, 4 megohmmeter C terminal wire, 5 conductive plug rod, 6 impurity removal mechanism, 61 rubber rod, 62 connecting bearing, 63 hard rod, 64 grip sleeve, 65 cleaning brush sleeve, 66 C-shaped elastic clamp block, 7 retracting mechanism, 71 rotating bearing, 72 metal retracting wheel, 73 conductive strip, 74 limiting inner gear ring, 75 micro electric push rod, 76 tooth block, 77 arc rubber damping block, 8 Damage detection mechanism, 81 detection tube, 82 threading hole, 83 magnetic field sensor, 84 AC electromagnet, 85 U-shaped wire limit rod, 86 sound and light alarm, 9 control mechanism, 91 PLC controller, 92 micro inverter, 93 control switch, 94 lithium battery, 10 hollow box, 11 bottom cover, 12 connecting strip, 13 double-headed motor, 14 rotating tube, 15 multi-channel conductive slip ring, 16 limit sleeve, 17 L-shaped plate, 18 rubber placement sleeve. DETAILED DESCRIPTION

[0019] 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. 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.

[0020] like Figure 1-Figure 6 As shown, a lightning protection detection device for urban buildings includes a grounding megohmmeter body 1, a megohmmeter E terminal line 2, a megohmmeter P terminal line 3, a megohmmeter C terminal line 4 and two conductive plug rods 5. The bottom end of the grounding megohmmeter body 1 is fixedly connected to a hollow box 10, and the outer walls on both sides of the hollow box 10 are fixedly connected to rubber placement sleeves 18 for limiting the conductive plug rods 5. The rubber placement sleeves 18 can conveniently store the conductive plug rods 5. The bottom end of the hollow box 10 is sealed and connected to a bottom cover 11, and the bottom cover 11 is fixedly connected to the outer wall of the bottom end of the hollow box 10 by bolts. The inner wall of the hollow box 10 is fixedly connected to a connecting strip 12, and the bottom end of the connecting strip 12 contacts the inner wall of the bottom cover 11. The outer wall of the connecting strip 12 is fixedly connected to a double-headed motor 13. The side wall of the hollow box 10 is opened with a through hole, and the hole wall of the through hole is connected to a rotating tube 14 through a rolling bearing. The side end of the rotating tube 14 located inside the hollow box 10 is fixedly connected to the connecting end of the double-headed motor 13 through a coupling.

[0021] One end of the double-headed motor 13 away from the rotating tube 14 is fixedly connected to a cleaning mechanism 6 for cleaning the test points of the lightning protection facilities of urban buildings. The cleaning mechanism 6 includes a rubber rod 61. A through hole is opened in the side wall of the hollow box 10, and the hole wall of the through hole is fixedly connected to a connecting bearing 62 for limiting the rubber rod 61. The side end of the rubber rod 61 is fixedly connected to the side end of the double-headed motor 13. One end of the rubber rod 61 away from the double-headed motor 13 is fixedly connected to a hard rod 63. The rod wall of the hard rod 63 is sleeved with a grip sleeve 64 through a rolling bearing. The outer end of the hard rod 63 is fixedly sleeved with a cleaning brush sleeve 65. The outer wall of the hollow box 10 is fixedly connected to a C-shaped elastic clamp 66 for clamping the grip sleeve 64. This mechanism enables the urban building lightning protection detection device to have the function of quickly cleaning the surface of the ground resistance test point, thereby ensuring the reliability of the electrical connection of the megohmmeter E terminal line 2 in the device, and ensuring the accuracy of the detection result of the lightning protection detection device, while improving the effect of the use of the detection device.

[0022] The outer end of the rotating tube 14 is fixedly connected to a multi-channel conductive slip ring 15. The outer wall of the rotating tube 14 is sleeved with three reeling mechanisms 7 for retracting and releasing the megohmmeter E terminal line 2, the megohmmeter P terminal line 3 and the megohmmeter C terminal line 4 respectively. The three reeling mechanisms 7 each include two rotating bearings 71 fixedly sleeved with the outer wall of the rotating tube 14. The outer walls of the two rotating bearings 71 are jointly sleeved with a metal reeling wheel 72. The outer wall of the rotating tube 14 is embedded with a conductive strip 73. The side end of the conductive strip 73 is in active contact with the inner wall of the metal reeling wheel 72. This can not only ensure the reliability of the conductive strip 73 and the metal reeling wheel 72 in conducting electricity, but also ensure the connection between the metal reeling wheel 72 and the rotating tube 14. The outer wall of the metal winding wheel 72 is fixedly sleeved with a limiting inner gear ring 74, and the wall of the rotating tube 14 is fixedly embedded with a micro-electric push rod 75. The moving end of the micro-electric push rod 75 is fixedly connected with a tooth block 76 meshing with the limiting inner gear ring 74, and the inner wall of the bottom cover 11 is fixedly connected with an arc-shaped rubber damping block 77 for positioning the winding mechanism 7. This mechanism enables the urban building lightning protection detection device to have the function of conveniently retracting and releasing the megohmmeter E terminal line 2, the megohmmeter P terminal line 3 and the megohmmeter C terminal line 4, thereby improving the convenience of using the lightning protection detection device, improving the efficiency of lightning protection detection, and reducing the detection intensity of the staff.

[0023] The connection ends of the three conductive strips 73 located on the inner side of the rotating tube 14 are electrically connected to the connection ends of the multi-channel conductive slip ring 15 through wires, and the ends of the megohmmeter E terminal line 2, the megohmmeter P terminal line 3 and the megohmmeter C terminal line 4 close to the rotating tube 14 are respectively electrically connected to the outer walls of the three metal winding wheels 72, and the outer walls of the three metal winding wheels 72 are respectively fixedly connected with limit sleeves 16 for positioning the megohmmeter E terminal line 2, the megohmmeter P terminal line 3 and the megohmmeter C terminal line 4. The outer wall of the multi-channel conductive slip ring 15 is fixedly sleeved with an L-shaped plate 17, and the side end of the L-shaped plate 17 is fixedly connected to the outer wall of the hollow box 10. The conductive wires of the multi-channel conductive slip ring 15 electrically connected to the three conductive strips 73 are respectively electrically connected to the E-connected electrical terminal, the P-connected electrical terminal and the C-connected electrical terminal of the grounded megohmmeter body 1, and the multi-channel conductive slip ring 15 can ensure the reliability of the electrical connection of the rotating parts in the device.

[0024] The outer walls of the megohmmeter E terminal wire 2, the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4 are all movably sleeved with a damage detection mechanism 8 for conductive core detection, and the outer wall of the hollow box 10 is provided with a plurality of mounting through holes that cooperate with the damage detection mechanism 8. The damage detection mechanism 8 includes a detection tube 81 fixedly sleeved with the hollow box 10, a threading hole 82 is provided at the center of the detection tube 81, and a magnetic field sensor 83 and an AC electromagnet 84 are symmetrically fixedly embedded on the inner wall of the detection tube 81. A U-shaped wire limit rod 85 is fixedly connected to the inner wall of the detection tube 81, and an audible and visual alarm 86 is fixedly connected to the outer wall of the detection tube 81. This mechanism enables the urban building lightning protection detection device to have the function of damage detection of the megohmmeter E terminal wire 2, the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4, which can effectively improve the accuracy of the detection result of the lightning protection detection device, avoid the hidden danger of lightning strike to the building, and at the same time ensure the safety of personnel and equipment in the building, and improve the reliability of the use of the lightning protection detection device.

[0025] A control mechanism 9 is fixedly connected to the inner wall of the hollow box 10, and the control mechanism 9 includes a plc controller 91 fixedly connected to the inner wall of the hollow box 10. A micro inverter 92 for AC power supply to the AC electromagnet 84 is fixedly connected to the interior of the hollow box 10. A control switch 93 is fixedly embedded in the top of the hollow box 10, and a lithium battery 94 is fixedly connected to the inner wall of the bottom cover 11. The sound and light alarm 86 is electrically connected to the output end of the plc controller 91 through a wire, and the magnetic field sensor 83 is electrically connected to the input end of the plc controller 91 through a wire. The micro electric push rod 75, the double-headed motor 13, the micro inverter 92 and the AC electromagnet 84 are all electrically connected to the lithium battery 94 through the control switch 93. The above-mentioned power-on equipment and electrical connections are all prior art and are well known to those skilled in the art, and will not be repeated here.

[0026] The operating principle of the present invention is now described as follows: when it is necessary to perform lightning protection detection on urban buildings, first take out the building lightning protection detection device from the tool box, then expose the grounding resistance test point of the urban building lightning protection facility, which is a grounding resistance detection point reserved for the urban building lightning protection facility. If it is found that there is too much dust attached to the surface of the grounding resistance test point of the lightning protection facility and there is interference with the reliability of the electrical connection of the megohmmeter E terminal line 2, the staff takes out the grip cover 64 from the C-shaped elastic clamp 66, and at the same time puts the cleaning brush cover 65 close to the surface of the grounding resistance test point of the lightning protection facility. Then the staff controls the double-headed motor 13 to start by controlling the button of the switch 93. The output end of the double-headed motor 13 drives the rubber rod 61 to rotate, the rubber rod 61 drives the hard rod 63 to rotate, and the hard rod 63 drives the cleaning brush cover 65 to rotate. The rotating cleaning brush cover 6 5 can quickly remove dust attached to the surface of the grounding resistance test point of the lightning protection facility, so that the staff does not need to manually wipe the surface of the grounding resistance test point of the lightning protection facility, saving time and effort, and achieving the purpose of cleaning the grounding resistance test point of the lightning protection facility. Then, the conductive clip at the side end of the megohmmeter E terminal line 2 is clamped and electrically connected to the cleaned lightning protection facility grounding resistance test point, and can ensure that the lightning protection facility grounding resistance test point is reliably electrically connected to the megohmmeter E terminal line 2, avoiding the occurrence of poor contact of the megohmmeter E terminal line 2 due to dust adhesion, effectively reducing interference with urban building lightning protection detection, the mechanism enables the urban building lightning protection detection device to have the function of quickly cleaning the surface of the grounding resistance test point, thereby ensuring the reliability of the electrical connection of the megohmmeter E terminal line 2 in the device, and ensuring the accuracy of the detection result of the lightning protection detection device, and at the same time can improve the effect of the use of the detection device; Then the staff member takes out two conductive plug rods 5 from the rubber placement sleeve 18, and electrically connects the two conductive plug rods 5 to the conductive clips at the side ends of the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4 respectively. Then the staff member pulls the side ends of the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4 outward, and the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4 are pulled to rotate the metal winding wheel 72 to automatically release the wire, so as to achieve the purpose of convenient wire release of the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4. During the wire release process, since the limiting inner tooth ring 74 on the outer side of the three metal winding wheels 72 is not engaged with the card tooth block 76, there is no constraint between the metal winding wheel 72 and the rotating tube 14, and the sliding friction between the arc-shaped rubber damping block 77 and the metal winding wheel 72 is less than that of the metal winding wheel 72. When subjected to the rotational force generated by the external pulling of the megohmmeter E terminal wire 2, the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4, the metal winding wheel 72 can rotate freely on the rotating tube 14 through the rotating bearing 71. Therefore, the three metal winding wheels 72 on the rotating tube 14 can automatically rotate and release the wires under the external pulling of the megohmmeter E terminal wire 2, the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4, respectively. Moreover, when the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4 are tightened in the same direction, the conductive plug rod 5 is inserted into the ground surface to complete the preparation work before the lightning protection detection device is detected. Moreover, while the megohmmeter E terminal wire 2, the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4 are pulled outward, the power supplied by the lithium battery 94 to the AC electromagnet 84 passes through the micro-inverter 92, and the micro-inverter 92 converts the direct current delivered by the lithium battery 94 into a The alternating current is converted into the alternating current required by the AC electromagnet 84, so that the AC electromagnet 84 generates an alternating magnetic field, and at this time, the magnetic field sensor 83 measures the magnetic field strength in the detection tube 81 in real time, and the magnetic field sensor 83 converts the detected magnetic field strength value into an electrical signal and transmits it to the PLC controller 91. The PLC controller 91 also presets the magnetic field strength safety range threshold when the megohmmeter E terminal line 2, the megohmmeter P terminal line 3 and the megohmmeter C terminal line 4 are intact, and the megohmmeter C terminal line 4 is constrained by the threading hole 82 and the U-shaped wire limit rod 85 to vertically pass through the alternating magnetic field generated by the AC electromagnet 84. At this time, the conductive core in the megohmmeter C terminal line 4 will generate eddy current due to electromagnetic induction, and the eddy current will generate its own magnetic field. When the conductive core in the megohmmeter C terminal line 4 is damaged (such as When there is crack and breakage), the distribution and intensity of eddy current will be changed, and then the magnetic field intensity generated by eddy current in the megohmmeter C terminal line 4 will be changed. In addition, since the current and voltage of the input AC electromagnet 84 remain unchanged, the magnetic field intensity generated by the AC electromagnet 84 remains unchanged. Therefore, when the conductive core in the megohmmeter C terminal line 4 is damaged and the magnetic field intensity of the detection tube 81 changes to exceed the magnetic field intensity safety range threshold preset by the plc controller 91, the plc controller 91 will control the sound and light alarm 86 in the damage detection mechanism 8 to alarm according to the electrical signal input by the magnetic field sensor 83, reminding the staff that the conductive core of the megohmmeter C terminal line 4 is damaged and needs to be replaced in time to carry out the lightning protection detection of the building, so as to avoid the conductive core in the megohmmeter C terminal line 4 being damaged and causing the current transmission to be blocked.This causes the resistance value detected by the ground megohmmeter body 1 to be distorted. On the other hand, it causes the detection data to fluctuate violently and be unstable, making it difficult to accurately judge the effectiveness of the lightning protection facilities. In addition, the megohmmeter E terminal line 2 and the megohmmeter P terminal line 3 will also perform damage detection like the megohmmeter C terminal line 4. This mechanism enables the urban building lightning protection detection device to have the function of detecting damage to the megohmmeter E terminal line 2, the megohmmeter P terminal line 3 and the megohmmeter C terminal line 4, which can effectively improve the accuracy of the detection result of the lightning protection detection device, avoid burying the hidden danger of lightning strike to the building, and at the same time ensure the safety of personnel and equipment in the building, and improve the reliability of the use of the lightning protection detection device; When the lightning protection detection device has completed the detection, first remove the conductive rod 5 from the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4, and insert the conductive rod 5 into the rubber placement sleeve 18, then the staff starts the double-headed motor 13 and the three micro-electric push rods 75 in the winding mechanism 7 in sequence by operating the switch 93, the moving end of the micro-electric push rod 75 extends, and the tooth block 76 is stuck in the tooth groove of the limiting inner gear ring 74, completing the constraint between the metal winding wheel 72 and the rotating tube 14, so that after the double-headed motor 13 drives the rotating tube 14 to rotate, the rotating tube 14 can drive the metal winding wheel 72 to rotate, and realize automatic winding of the megohmmeter E terminal wire 2, the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4, when the megohmmeter E terminal wire 2, the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4 are about to be wound up, the button of the operating switch 93 is used. The button controls the moving end of the micro-electric push rod 75 corresponding to the megohmmeter E terminal wire 2, the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4 to retract, and makes the tooth block 76 move away from the limiting inner gear ring 74, so that the metal winding wheel 72 stops rotating under the sliding friction of the arc-shaped rubber damping block 77, and the other metal winding wheels 72 continue to be driven by the rotating tube 14 to rotate and rewind until the megohmmeter E terminal wire 2, the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4 are all rewound, and then the double-headed motor 13 is controlled to be powered off and closed by the control switch 93. This mechanism enables the urban building lightning protection detection device to have the function of conveniently retracting and releasing the megohmmeter E terminal wire 2, the megohmmeter P terminal wire 3 and the megohmmeter C terminal wire 4, thereby improving the convenience of using the lightning protection detection device, improving the efficiency of lightning protection detection, and reducing the detection intensity of the staff.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lightning protection detection device for urban buildings, comprising a ground megohmmeter body (1), a megohmmeter E terminal wire (2), a megohmmeter P terminal wire (3), a megohmmeter C terminal wire (4) and two conductive plug rods (5), characterized in that: The bottom end of the ground megohmmeter body (1) is fixedly connected to a hollow box (10), the bottom end of the hollow box (10) is sealedly connected to a bottom cover (11), the bottom cover (11) is fixedly connected to the outer wall of the bottom end of the hollow box (10) by bolts, the inner wall of the hollow box (10) is fixedly connected to a connecting strip (12), the bottom end of the connecting strip (12) contacts the inner wall of the bottom cover (11), the outer wall of the connecting strip (12) is fixedly connected to a double-headed motor (13), the side wall of the hollow box (10) is provided with a through hole, and the hole wall of the through hole is connected to a rotating tube (14) via a rolling bearing, and the side end of the rotating tube (14) located inside the hollow box (10) is fixedly connected to the connecting end of the double-headed motor (13) via a coupling; One end of the double-headed motor (13) away from the rotating tube (14) is fixedly connected to a cleaning mechanism (6) for cleaning the grounding resistance test point of urban building lightning protection facilities; The outer end of the rotating tube (14) is fixedly connected to a multi-channel conductive slip ring (15), and the outer wall of the rotating tube (14) is sleeved with three retracting mechanisms (7) for retracting and releasing the megohmmeter E terminal wire (2), the megohmmeter P terminal wire (3) and the megohmmeter C terminal wire (4); The outer walls of the megohmmeter E terminal wire (2), the megohmmeter P terminal wire (3) and the megohmmeter C terminal wire (4) are all movably sleeved with a damage detection mechanism (8) for detecting the conductive core, and the outer wall of the hollow box (10) is provided with a plurality of mounting through holes that cooperate with the damage detection mechanism (8); A control mechanism (9) is fixedly connected to the inner wall of the hollow box (10).

2. A lightning protection detection device for urban buildings according to claim 1, characterized in that: The impurity removal mechanism (6) comprises a rubber rod (61), a through hole is formed on the side wall of the hollow box (10), and a connecting bearing (62) for limiting the rubber rod (61) is fixedly connected to the hole wall of the through hole, the side end of the rubber rod (61) is fixedly connected to the side end of the double-headed motor (13), the end of the rubber rod (61) away from the double-headed motor (13) is fixedly connected to a hard rod (63), the rod wall of the hard rod (63) is sleeved with a grip sleeve (64) via a rolling bearing, the outer end of the hard rod (63) is fixedly sleeved with a cleaning brush sleeve (65), and the outer wall of the hollow box (10) is fixedly connected with a C-shaped elastic clamp (66) for clamping the grip sleeve (64).

3. A lightning protection detection device for urban buildings according to claim 1, characterized in that: The three retracting mechanisms (7) each comprise two rotating bearings (71) fixedly sleeved with the outer wall of the rotating tube (14); the outer walls of the two rotating bearings (71) are sleeved with a metal retracting wheel (72); the outer wall of the rotating tube (14) is embedded with a conductive strip (73); the side end of the conductive strip (73) is in movable contact with the inner wall of the metal retracting wheel (72); the outer wall of the metal retracting wheel (72) is fixedly sleeved with a limiting inner toothed ring (74); the tube wall of the rotating tube (14) is fixedly embedded with a micro electric push rod (75); the movable end of the micro electric push rod (75) is fixedly connected with a tooth block (76) meshing with the limiting inner toothed ring (74); and the inner wall of the bottom cover (11) is fixedly connected with an arc-shaped rubber damping block (77) used for positioning the retracting mechanism (7).

4. A lightning protection detection device for urban buildings according to claim 3, characterized in that: The connection ends of the three conductive strips (73) located inside the rotating tube (14) are electrically connected to the connection ends of the multi-channel conductive slip ring (15) through wires, and the ends of the megohmmeter E terminal wire (2), the megohmmeter P terminal wire (3) and the megohmmeter C terminal wire (4) close to the rotating tube (14) are electrically connected to the outer walls of the three metal winding wheels (72), respectively, and the outer walls of the three metal winding wheels (72) are respectively fixedly connected with limit sleeves (16) for positioning the megohmmeter E terminal wire (2), the megohmmeter P terminal wire (3) and the megohmmeter C terminal wire (4).

5. A lightning protection detection device for urban buildings according to claim 4, characterized in that: An L-shaped plate (17) is fixedly sleeved on the outer wall of the multi-channel conductive slip ring (15), and the side end of the L-shaped plate (17) is fixedly connected to the outer wall of the hollow box (10). Three conductive wires of the multi-channel conductive slip ring (15) that are electrically connected to the three conductive strips (73) are respectively electrically connected to the E-connection terminal, the P-connection terminal, and the C-connection terminal of the grounding shaker body (1).

6. A lightning protection detection device for urban buildings according to claim 1, characterized in that: The damage detection mechanism (8) comprises a detection tube (81) fixedly sleeved with the hollow box (10), a threading hole (82) being provided at the center of the detection tube (81), a magnetic field sensor (83) and an AC electromagnet (84) being symmetrically fixedly embedded on the inner wall of the detection tube (81), a U-shaped wire limiting rod (85) being fixedly connected to the inner wall of the detection tube (81), and an audible and visual alarm (86) being fixedly connected to the outer wall of the detection tube (81).

7. The urban building lightning protection detection device according to claim 1 is characterized in that: The control mechanism (9) comprises a PLC controller (91) fixedly connected to the inner wall of the hollow box (10); a micro inverter (92) for supplying AC power to the AC electromagnet (84) is fixedly connected inside the hollow box (10); a control switch (93) is fixedly embedded at the top of the hollow box (10); and a lithium battery (94) is fixedly connected to the inner wall of the bottom cover (11).

8. The urban building lightning protection detection device according to claim 1 is characterized in that: The outer walls on both sides of the hollow box (10) are fixedly connected with rubber placement sleeves (18) for limiting the position of the conductive plug rod (5).

Images