Waterproof grounding resistance on-line monitor

Abstract

The invention discloses a waterproof grounding resistance on-line monitor which comprises a monitor body, and a shell is arranged at the bottom of the monitor body. A first winding roller and a second winding roller are rotatably arranged in the shell through a supporting plate, the first winding roller is rotatably arranged on the periphery of the second winding roller in a sleeving mode, a guide mechanism matched with the first winding roller and the second winding roller is arranged at the bottom of the inner wall of the shell, and when a motor rotates, the first winding roller and the second winding roller are driven to rotate; a separation mechanism is arranged at the end, away from the connecting ring, of the first transmission wheel, and when the separation mechanism moves, the first transmission wheel is driven to move to be separated from the connecting ring. During use, when a connecting wire on the monitor body is wound, the reciprocating block and the guide block are matched, so that the connecting wire can vertically reciprocate up and down relative to the monitor body and the shell during winding, and the connecting wire is uniformly wound on the corresponding winding rollers.

Description

Technical Field

[0001] This invention relates to the field of grounding resistance monitoring technology, specifically a waterproof online grounding resistance monitoring instrument. Background Technology

[0002] The online grounding resistance monitoring instrument is suitable for online monitoring of grounding networks in cultural relics buildings, meteorological lightning protection facilities, communication base stations, substations, railway facilities, building warehouses, electrical equipment, power distribution rooms and network computer rooms, lightning protection towers, etc.

[0003] Chinese Patent Publication No. CN110058085B: A grounding resistance tester. Currently, the setting of auxiliary grounding points in power construction and engineering acceptance typically involves hammering steel rods into the ground, which is labor-intensive, poses safety hazards, and is difficult to perform in frozen soil during winter. The technical solution includes a tester body and a grounding rod. A support sleeve is fitted over the grounding rod, and support rods are symmetrically arranged on both sides of the support sleeve. A foot pedal is located at the bottom of the support rod. The grounding rod includes a threaded section and a spiked section. A threaded sleeve, threaded to the threaded section, is rotatably connected to the top of the support sleeve. A drive device for rotating the threaded sleeve is located at the top of the support sleeve. Guide rods are symmetrically arranged on both sides of the support sleeve along the vertical direction. A slider, slidably connected to the guide rods, is fixed to the top of the grounding rod.

[0004] In actual use, when the above-mentioned device is used to wind up the wires, the drive shaft is rotated to drive the inner drum to rotate for winding, and then the drive shaft is slid to drive the outer drum to rotate for winding. However, it cannot wind up two wires at the same time, which makes the operation cumbersome. Although the existing technology can wind up two sets of wires at the same time, since the wires used are long, when winding up the wires, the wires are all wrapped around one end of the winding roller. This results in the wires being wound unevenly on the winding roller. Since the width of the wound wire is greater than the width of the winding roller, some wires fall off the winding roller, causing the fallen wires to get tangled together, which affects subsequent use.

[0005] Therefore, it is necessary to provide a waterproof online grounding resistance monitoring instrument to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a waterproof grounding resistance online monitoring instrument to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a waterproof grounding resistance online monitoring instrument, comprising a monitoring instrument body, the bottom of which is provided with a housing; a first winding roller and a second winding roller are rotatably arranged inside the housing via a support plate, the first winding roller being rotatably sleeved around the second winding roller, a connecting ring being fixedly arranged at the end of the first winding roller near the monitoring instrument body, a first transmission wheel being slidably arranged at the center of the second winding roller, a motor being driven to the end of the first transmission wheel and the connecting ring away from the housing, a guide mechanism cooperating with the first winding roller and the second winding roller being provided at the bottom of the inner wall of the housing, the first winding roller and the second winding roller being driven to rotate when the motor rotates, a separation mechanism being provided at the end of the first transmission wheel away from the connecting ring, the first transmission wheel being driven to move and separate from the connecting ring when the separation mechanism moves.

[0008] As a further embodiment of the present invention: the end of the connecting ring away from the first take-up roller passes through the bottom side wall of the monitor body, and the connecting ring is rotatably connected to the monitor body; the end of the first transmission wheel away from the second take-up roller is slidably engaged with the inner side wall of the connecting ring; the motor is fixedly installed in the monitor body, and when the monitor body rotates, it drives the first transmission wheel and the connecting ring to rotate through the output end.

[0009] As a further embodiment of the present invention: the guiding mechanism is provided in two sets, one set of guiding mechanism is provided on the outside of the first take-up roller and corresponding to the first take-up roller, and the other set of guiding mechanism is provided between the second take-up roller and the first take-up roller and corresponding to the second take-up roller.

[0010] As a further aspect of the present invention: the guiding mechanism includes a fixed column; the bottom of the fixed column is fixedly connected to the bottom of the inner wall of the outer shell, the fixed column is hollow, a bidirectional lead screw is rotatably connected inside the fixed column, a reciprocating block is rotatably connected to the bidirectional lead screw, one end of the reciprocating block away from the bidirectional lead screw slides through the side wall of the fixed column, and a guide block is fixedly connected to the other end of the reciprocating block away from the bidirectional lead screw. When the first winding roller and the second winding roller rotate, the bidirectional lead screw is driven to rotate, and the reciprocating block moves up and down along the vertical direction between the fixed column and the bottom of the inner wall of the outer shell.

[0011] As a further aspect of the present invention: a second transmission wheel that is connected to the first winding roller is fixedly connected to the top end of one set of bidirectional lead screws; a first gear is fixedly connected to the top end of another set of bidirectional lead screws; a toothed ring is fixedly connected to the inner side wall of the first winding roller; a second gear is meshed with the outer side of the first gear; the first gear is connected to the toothed ring through the second gear; the bottom end of the second gear is rotatably connected to the separation mechanism; and the separation mechanism is set on another set of fixed columns corresponding to the second winding roller.

[0012] As a further embodiment of the present invention: the separation mechanism includes two sets of fixing plates; the fixing plates are fixedly connected to one side of another set of guide mechanisms, a limit block is fixedly connected to the end of the fixing plate away from the fixing column, a separation rod is slidably connected to the outside of the limit block, a connecting plate is fixedly connected to the bottom end of the separation rod, the end of the connecting plate away from the separation rod is fixedly connected to the bottom end of the first transmission wheel, and the top end of the separation rod is rotatably connected to the bottom end of the second gear.

[0013] As a further embodiment of the present invention: a transmission rack is rotatably provided in the middle of the fixed plate, and a tooth is provided on the side of the separating rod near the transmission rack to mesh with the transmission rack. Both sets of fixed columns are slidably provided with toothed plates on the side near the separating rod. The transmission rack meshes with the corresponding toothed plate on the other set of fixed columns, and a limit plate is fixedly connected to the end of the toothed plate away from the transmission rack.

[0014] As a further aspect of the present invention: a push rod is slidably disposed inside the limiting plate, and a clamping plate is fixedly connected to the end of the push rod away from the toothed plate. The clamping plate is slidably engaged with the inner wall of the limiting plate. The push rod and the inner wall of the limiting plate are elastically connected by a spring. A notch is opened on the side of the limiting plate near the toothed plate. A trigger block is slidably disposed at the bottom of the outer shell corresponding to the notch. A limiting buckle for locking and limiting the limiting plate is provided at the bottom of the outer shell.

[0015] As a further embodiment of the present invention: a slider is fixedly connected to one end of the trigger block near the outer shell, the slider is slidably connected to the bottom side wall of the outer shell, a protrusion is fixedly connected to the bottom of one end of the slider near the trigger block, the protrusion is slidably attached to the bottom surface of the outer shell, and a spring is provided between the opposite ends of the two sets of sliders.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: In use, when the connecting wires on the monitor body are wound up, the starting motor drives the first winding roller and the second winding roller to rotate through the connecting ring and the first transmission wheel, winding up the two connecting wires. At the same time, the rotation of the first winding roller and the second winding roller can drive the bidirectional lead screw to rotate through the transmission component. Then, through the cooperation of the reciprocating block and the guide block, the connecting wires can move vertically back and forth between the monitor body and the outer shell during winding, so that the connecting wires are evenly wound on the corresponding winding rollers. In addition, the limiting plate makes the connecting wires wound more tightly, avoiding the connecting wires being loosely wound at one end of the winding roller, improving practicality. After winding is completed, the clamping plate in the limiting plate moves relative to the connecting wires through the movement of the limiting plate and the cooperation of the trigger block to complete the clamping and fixing of the connecting wires, making it difficult for the connecting wires to move when not in use. Attached Figure Description

[0017] Figure 1This is a frontal three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a side cross-sectional view of the present invention.

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the middle part of the outer shell in this invention.

[0020] Figure 4 This is a schematic diagram of the structure of the bottom surface of the first take-up roller in this invention.

[0021] Figure 5 This is a schematic diagram of the top cross-section of the first take-up roller in this invention.

[0022] Figure 6 This is a schematic diagram of the separation mechanism in this invention.

[0023] Figure 7 In this invention Figure 6 A schematic diagram of the structure at point B.

[0024] Figure 8 This is a schematic diagram of the guide block in this invention.

[0025] Figure 9 This is a schematic diagram of the structure of the separation rod, transmission rack, and gear plate in this invention.

[0026] Figure 10 This is a schematic diagram of the push rod in this invention.

[0027] Figure 11 In this invention Figure 1 A schematic diagram of the structure at point A in the middle.

[0028] Figure 12 This is a schematic diagram of the slider in this invention.

[0029] Figure 13 This is a schematic diagram of the support block in this invention.

[0030] Figure 14 This is a schematic diagram illustrating the grounding resistance detection principle of the monitoring instrument body in this invention.

[0031] Figure 15 This is a diagram showing the calculation formula for the grounding resistance of the monitoring instrument body in this invention.

[0032] In the diagram: 1. Monitor body; 2. Housing; 3. Motor; 4. First transmission wheel; 5. Connecting ring; 6. Fixed column; 61. Second transmission wheel; 62. Bidirectional lead screw; 63. Reciprocating block; 64. First gear; 65. Guide block; 7. First take-up roller; 71. Second take-up roller; 72. Support plate; 8. Fixed plate; 9. Limiting plate; 91. Clamping plate; 92. Push rod; 10. Gear plate; 11. Separating rod; 12. Transmission gear; 13. Second gear; 14. Gear ring; 15. Connecting plate; 16. Limiting block; 17. Limiting buckle; 18. Trigger block; 181. Slider; 182. Protrusion. Detailed Implementation

[0033] Please see Figures 1-4 In this embodiment of the invention, a waterproof grounding resistance online monitoring instrument includes a monitoring instrument body 1, with a housing 2 at the bottom of the monitoring instrument body 1. The monitoring instrument body 1 is dustproof and waterproof, and has two test connection wires. One end of each connection wire is electrically connected to the monitoring instrument body 1. The bottom of the housing 2 has a wire hole for the connection wires on the monitoring instrument body 1 to pass through. Inside the housing 2, a first winding roller 7 and a second winding roller 71 are rotatably mounted via a support plate 72. The first winding roller 7 is rotatably sleeved around the second winding roller 71. The first winding roller 7 is close to the monitoring instrument. A connecting ring 5 is fixedly provided at one end of the main body 1. A first transmission wheel 4 is slidably provided at the center of the second take-up roller 71. A motor 3 is connected to the end of the first transmission wheel 4 and the connecting ring 5 away from the outer shell 2. A guide mechanism that cooperates with the first take-up roller 7 and the second take-up roller 71 is provided at the bottom of the inner wall of the outer shell 2. When the motor 3 rotates, it drives the first take-up roller 7 and the second take-up roller 71 to rotate and connect the first take-up roller 7 and the second take-up roller 71 to be wound up. A separation mechanism is provided at the end of the first transmission wheel 4 away from the connecting ring 5. When the separation mechanism moves, it drives the first transmission wheel 4 to move and separate from the connecting ring 5.

[0034] like Figure 13 Preferably, the support plates 72 are arranged in two sets in a ring array, corresponding to the first take-up roller 7 and the second take-up roller 71 respectively, and each set includes three support plates 72. The bottom of the first take-up roller 7 and the second take-up roller 71 is provided with support grooves that are adapted to rotate with the support plates 72. The support plates 72 and the support grooves form effective support for the first take-up roller 7 and the second take-up roller 71.

[0035] Please see Figure 14 , Figure 15The working principle of the monitoring instrument body 1: The grounding resistance value is measured using the rated current polarity changing method. This involves flowing a rated AC current I (11mA Max, 128Hz) between the measured object E (grounding electrode) and C (current electrode), calculating the potential difference V between E and P (voltage electrodes), and then determining the grounding resistance Rx, where Rx = V / I. Its operating error (B) is the error obtained under rated operating conditions, calculated from the inherent error (A) and variation error (Ei) of the instrument. The specific calculation formula is as follows: Figure 15 As shown. A: Inherent error; E1: Variation caused by position change; E2: Variation caused by power supply voltage change; E3: Variation caused by temperature change; E4: Variation caused by interference voltage change; E5: Variation caused by contact electrode resistance; E7: Variation caused by system frequency change; E8: Variation caused by system voltage change.

[0036] Please see Figures 1-5 The end of the connecting ring 5 away from the first take-up roller 7 passes through the bottom side wall of the monitor body 1, and the connecting ring 5 is rotatably connected to the monitor body 1. The end of the first transmission wheel 4 away from the second take-up roller 71 is slidably engaged with the inner side wall of the connecting ring 5. The first transmission wheel 4 can slide up and down inside the connecting ring 5. When the first transmission wheel 4 slides down, it is lower than the height of the connecting ring 5 and separates from the motor 3. The motor 3 is fixedly installed inside the monitor body 1. When the monitor body 1 rotates, it drives the first transmission wheel 4 and the connecting ring 5 to rotate through the output end. Preferably, the end of the first transmission wheel 4 is set as a bevel gear, and the end of the connecting ring 5 is set as a bevel gear ring. The output end structure of the monitor body 1 is a bevel gear that meshes with the bevel gear on the first transmission wheel 4 and the bevel gear ring on the connecting ring 5. In this way, when the monitor body 1 outputs power, it effectively drives the first transmission wheel 4 and the connecting ring 5 to rotate, thereby driving the first take-up roller 7 and the second take-up roller 71 to rotate. Both the main body 1 and the outer casing 2 of the monitoring instrument are equipped with rotatable protective doors on the front, which firstly protect the inside of the main body 1 and the outer casing 2, and secondly facilitate personnel to inspect and maintain the main body 1 and the outer casing 2.

[0037] In practical use, a grounding nail is connected to the end of the monitoring instrument body 1 furthest from the connecting wire. During testing, the two grounding nails are inserted into the ground at a distance of 5-10m (or other corresponding test distance) from the grounding body along the radial direction of the grounding body. Generally, the lengths of the two wires are: one connecting wire is half the length of the other connecting wire. The longer connecting wire is wound around the first winding roller 7, and the shorter connecting wire is wound around the second winding roller 71. Since the wires are relatively long, the two wires are wound and stored by the first winding roller 7 and the second winding roller 71, which facilitates the unfolding and storage of the connecting wires before and after testing. In the initial state, the two connecting wires are... Do not wrap the wire around the first take-up roller 7 and the second take-up roller 71. The end of the wire passes through the wire hole on the outer casing 2 and connects to the grounding nail. During testing, after fixing the monitoring instrument body 1, pull the grounding nail to move it to the specified position. The movement of the grounding nail causes the connecting wire to spread off from the first take-up roller 7 and the second take-up roller 71. When the connecting wire has completely spread off from the first take-up roller 7 and the second take-up roller 71, it can no longer be pulled, that is, the grounding nail has also reached the specified position. Then the testing operation can be performed. When it is necessary to retract the connecting wire, start the motor 3 to drive the first take-up roller 7 and the second take-up roller 71 to rotate and wind the connecting wire through the first transmission wheel 4 and the connecting ring 5. It is simple and convenient.

[0038] Please see Figures 2-5 The guide mechanism is provided in two sets. One set of guide mechanism is located outside the first take-up roller 7 and is corresponding to the first take-up roller 7. The other set of guide mechanism is located between the second take-up roller 71 and the first take-up roller 7 and is corresponding to the second take-up roller 71.

[0039] Please see Figures 3-5 , Figure 8The guiding mechanism includes a fixed column 6; the bottom of the fixed column 6 is fixedly connected to the bottom of the inner wall of the outer shell 2. The fixed column 6 is hollow. A bidirectional lead screw 62 is rotatably connected inside the fixed column 6. A reciprocating block 63 is rotatably connected to the bidirectional lead screw 62. The end of the reciprocating block 63 away from the bidirectional lead screw 62 slides through the side wall of the fixed column 6. A guide block 65 is fixedly connected to the end of the reciprocating block 63 away from the bidirectional lead screw 62. When the first take-up roller 7 and the second take-up roller 71 rotate, the bidirectional lead screw 62 is driven to rotate. The reciprocating block 63 moves up and down in the vertical direction between the fixed column 6 and the bottom of the inner wall of the outer shell 2. During use, the connecting wire passes through the guide block 65. A roller is provided at one end of the guide block 65 near the second take-up roller 71, which facilitates the sliding of the connecting wire on the guide block 65 and effectively reduces wear on the connecting wire. The guide block 65 can move up and down on the fixed column 6 through the cooperation of the bidirectional screw 62 and the reciprocating block 63. When the connecting wire is rotated and taken up by the first take-up roller 7 and the second take-up roller 71, the connecting wire is evenly wound on the first take-up roller 7 and the second take-up roller 71 under the guidance of the guide block 65. This prevents the connecting wire from being wound only at one end, which would cause the part of the connecting wire protruding from the first take-up roller 7 and the second take-up roller 71 to fall off and become entangled.

[0040] Please see Figure 3 , Figure 5One set of bidirectional lead screws 62 has a second transmission wheel 61 fixedly connected to the top end, which is connected to the first take-up roller 7. Another set of bidirectional lead screws 62 has a first gear 64 fixedly connected to the top end. A gear ring 14 is fixedly connected to the inner wall of the first take-up roller 7. A second gear 13 meshes with the outer side of the first gear 64. The first gear 64 is connected to the gear ring 14 via the second gear 13. When the first take-up roller 7 rotates, it drives the second transmission wheel 61 and the gear ring 14 to rotate. The rotation of the second transmission wheel 61 drives the corresponding set of bidirectional lead screws 62 to rotate, causing the corresponding guide block 65 to move up and down reciprocally when the first take-up roller 7 rotates to take up the yarn. The rotation of the gear ring 14 drives the second gear 13 to rotate, which in turn drives the first gear 64 to rotate. The rotation of the first gear 64 drives the other set of bidirectional lead screws 62 corresponding to the second take-up roller 71 to rotate. The movement causes the guide block 65 corresponding to the second take-up roller 71 to move up and down reciprocally, thereby allowing the two connecting lines to be evenly wound around the first take-up roller 7 and the second take-up roller 71 respectively. The bottom end of the second gear 13 is rotatably connected to the separation mechanism. The separation mechanism is set on another set of fixed columns 6 corresponding to the second take-up roller 71. Since the length of the connecting line on the second take-up roller 71 is half that of the connecting line on the first take-up roller 7, when the connecting line corresponding to the second take-up roller 71 is finished winding, the separation mechanism moves downward relative to the second gear 13, causing the second gear 13 to move downward and separate from the gear ring 14 and the first gear 64. This causes the other set of guiding mechanisms, namely the guide block 65 corresponding to the second take-up roller 71, to stop moving up and down reciprocally, while the set of guide blocks 65 corresponding to the first take-up roller 7 continues to move up and down reciprocally to guide the connecting lines.

[0041] Please see Figures 5-9The separating mechanism includes two sets of fixed plates 8; the fixed plates 8 are fixedly connected to one side of another set of fixed columns 6, and a limit block 16 is fixedly connected to the inner end of the fixed plate 8 away from the fixed column 6. A separating rod 11 is slidably connected to the outer side of the limit block 16. The cooperation of the fixed plates 8 and the limit block 16 limits the sliding direction of the separating rod 11 to prevent deflection during movement. A connecting plate 15 is fixedly connected to the bottom end of the separating rod 11, and the end of the connecting plate 15 away from the separating rod 11 is fixedly connected to the bottom end of the first transmission wheel 4. When winding, when the second winding roller 71... When the connecting wire is wound up, the separating rod 11 is driven to move downward, which in turn drives the connecting plate 15 to move downward. The downward movement of the connecting plate 15 drives the first transmission wheel 4 to move downward inside the second winding roller 71 and separate from the motor 3, thereby enabling the motor 3 to continue rotating and drive the first winding roller 7 to rotate through the connecting ring 5 to continue winding. The top end of the separating rod 11 is rotatably connected to the bottom end of the second gear 13. A spring is provided between the bottom of the connecting plate 15 and the bottom of the inner wall of the outer casing 2. Through the spring, the separating rod 11 and the connecting plate 15 rise, driving the first transmission wheel 4 to move upward. The separating rod 11 has a square groove that slides to fit the limiting block 16, and the separating rod 11 is slidably connected to the fixing plate 8 through the limiting block 16. The remote movement trajectory of the separating rod 11 is a vertical movement. When there is no connecting line on the first winding roller 7 and the second winding roller 71, and under the action of the spring pushing the connecting plate 15, the bottom of the square groove on the separating rod 11 is made to fit with the bottom of the limiting block 16. Under the action of the separating rod 11, the second gear 13 meshes with the gear ring 14 and the first gear 64.

[0042] Furthermore, a transmission rack 12 is rotatably arranged in the middle of the fixed plate 8. The separating rod 11 has teeth that mesh with the transmission rack 12 on its side near the side of the separating rod 12. Both sets of fixed posts 6 have toothed plates 10 slidably arranged on their sides near the separating rod 11. Preferably, two sets of toothed plates 10 are provided, each corresponding to one side of one set of fixed posts 6. The toothed plate 10 on the set of fixed posts 6 corresponding to the first take-up roller 7 does not have a corresponding separating rod 11, transmission rack 12, fixed plate 8, or limiting block 16. However, both sets of toothed plates 10 have limiting plates 9 at their bottom ends. The transmission rack 12 meshes with the corresponding toothed plate 10 on the other set of fixed posts 6. The end of the toothed plate 10 away from the transmission rack 12 is fixed. The limiting plate 9 is connected, and the end of the toothed plate 10 slides through the side wall of the outer shell 2. The end of the limiting plate 9 away from the toothed plate 10 is a ring for the connecting wire to pass through. The end of the ring away from the outer shell 2 is equipped with a rubber sleeve, which is conical in shape and fits tightly against the outer shell of the connecting wire. Since the rubber sleeve itself is deformable, when the connecting wire is wound up, the friction between the rubber sleeve and the outer shell of the connecting wire provides a certain resistance to the winding of the connecting wire, so that the connecting wire fits more tightly against the first winding roller 7 and the second winding roller 71 after winding up. In addition, when winding up the wire, the rubber sleeve can scrape off soil particles or debris such as weeds and dead branches adhering to the outside of the connecting wire, thereby ensuring that the surface of the connecting wire is clean.

[0043] In use, the end of the connecting wire away from the monitor body 1 passes through the limiting plate 9 and the rubber sleeve. When winding the wire, the starter motor 3 drives the first winding roller 7 and the second winding roller 71 to rotate via the first transmission wheel 4 and the connecting ring 5. The rotation of the first winding roller 7 and the second winding roller 71 drives the second transmission wheel 61 and the gear ring 14 to rotate. The rotation of the gear ring 14 drives the first gear 64 to rotate via the second gear 13, causing the two sets of bidirectional lead screws 62 to rotate. The rotation of the bidirectional lead screws 62 causes the guide block 65 to move up and down under the limitation of the fixed column 6 via the reciprocating block 63, guiding the winding connecting wire so that the connecting wire is evenly wound onto the first winding roller 7 and the second winding roller 71. When the shorter connecting wire on the second winding roller 71 is finished, the grounding nail at the end of the connecting wire collidees with the limiting plate 9, and the limiting plate 9 relative to the second winding roller 71... Driven by the movement of the limiting plate 9 relative to the second take-up roller 71, the toothed plate 10 moves upward relative to the second take-up roller 71. The movement of the toothed plate 10 causes the separating rod 11 to move downward relative to the second take-up roller 71 through the transmission rack 12. The movement of the separating rod 11 simultaneously causes the second gear 13 and the connecting plate 15 to move downward. The downward movement of the second gear 13 separates it from the toothed ring 14 and the first gear 64, and the bidirectional lead screw 62, reciprocating block 63, and guide block 65 stop moving. The downward movement of the connecting plate 15 causes the first transmission wheel 4 to move downward and separate from the motor 3. In this way, the second take-up roller 71 no longer rotates to perform the winding work, while the motor 3 continues to drive the first take-up roller 7 to rotate to perform the winding. This is convenient to use. When the connecting wire on the first take-up roller 7 is finished winding, the motor 3 can be turned off. This achieves synchronous winding of the two connecting wires, saving time and improving work efficiency.

[0044] Please see Figures 10-13Furthermore, a push rod 92 is slidably disposed within the limiting plate 9. A clamping plate 91 is fixedly connected to the end of the push rod 92 away from the toothed plate 10. The clamping plate 91 slides within the inner wall of the limiting plate 9. The clamping plate 91 has an arc-shaped structure and is slidably disposed within the annulus. The push rod 92 is elastically connected to the inner wall of the limiting plate 9 via a spring. Under the action of the spring, when the push rod 92 is not under force, the end of the push rod 92 near the toothed plate 10 is in contact with the end of the inner wall of the limiting plate 9 near the toothed plate 10, and the clamping plate 91 is in contact with the inner wall of the annulus near the toothed plate 10. A notch is provided on the side of the limiting plate 9 near the toothed plate 10. A trigger block 18 is slidably disposed at the bottom of the outer casing 2 corresponding to the notch. When the limiting plate 9 moves relative to the trigger block 18, the notch causes the top of the trigger block 18 to slide into contact with the end of the push rod 92, pressing the push rod 92 away from the toothed plate 10. The push rod 92 pushes the clamping plate 91 to clamp and limit the connecting wire within the ring. The bottom of the outer casing 2 is provided with a limiting buckle 17 for engaging and limiting the limiting plate 9. When the limiting plate 9 moves to fit against the bottom of the outer casing 2, the limiting buckle 17 rotates and engages with the bottom surface of the limiting plate 9, thus limiting the limiting plate 9. This will cause the limiting plate 9 to... The corresponding toothed plate 10 is positioned, which in turn limits the position of the separating rod 11. The limiting of the separating rod 11 limits the positions of the second gear 13 and the connecting plate 15, thus limiting the position of the first transmission wheel 4, preventing it from meshing with the motor 3. During unwinding, even if the connecting wire on the second take-up roller 71 is completely unwound due to the limiting buckle 17, the motor 3 will not engage. This prevents the second take-up roller 71 from rotating while the first transmission wheel 4 is engaged with the motor 3 after the connecting wire on it has been completely unwound, thus avoiding unwinding failure and affecting usability. The trigger block 18... A slider 181 is fixedly connected to one end of the outer casing 2. The slider 181 is slidably connected to the bottom side wall of the outer casing 2. A protrusion 182 is fixedly connected to the bottom of the slider 181 near the trigger block 18. The protrusion 182 slides against the bottom surface of the outer casing 2. A spring is provided between the opposite ends of the two sets of sliders 181. When in use, with the connecting wire wound on the first take-up roller 7 and the second take-up roller 71, the limiting plate 9 and the limiting buckle 17 engage. The trigger block 18 engages with the push rod 92. The clamping plate 91 limits the connecting wire in the circular part, preventing the connecting wire from being pulled or falling off when not in use.During wire feeding, the relative sliding protrusion 182 causes the slider 181 to move closer together. The movement of the slider 181 causes the trigger block 18 to separate from the limiting plate 9. The push rod 92 then moves and resets relative to the toothed plate 10 under the action of the spring, causing the clamping plate 91 to move relative to the toothed plate 10 and fit against the inner wall of the ring. At this time, the limit of the connecting wire is released, and the connecting wire can be pulled randomly. After all the connecting wires are placed in the designated position, the limiting buckle 17 is separated from the limiting plate 9, or the limiting buckle 17 is separated from the limiting plate 9 during wire reeling. The limiting plate 9 moves downward relative to the outer shell 2, causing the toothed plate 10 to move downward. The movement of the toothed plate 10 causes the separating rod 11 to move downward through the transmission gear 12. The moving separating rod 11 causes the second gear 13 to move upward and mesh with the toothed ring 14 and the first gear 64. It also causes the connecting plate 15 to move upward, causing the first transmission wheel 4 to reset and mesh with the motor 3.

Claims

1. A waterproof online grounding resistance monitoring instrument, comprising a monitoring instrument body, wherein a housing is provided at the bottom of the monitoring instrument body; characterized in that, Inside the housing, a first take-up roller and a second take-up roller are rotatably mounted via a support plate. The first take-up roller is rotatably sleeved around the second take-up roller. A connecting ring is fixedly mounted on the end of the first take-up roller closer to the monitor body. A first transmission wheel is slidably mounted on the center of the second take-up roller. A motor is driven to the end of the first transmission wheel and the connecting ring away from the housing. A guide mechanism is provided at the bottom of the inner wall of the housing to cooperate with the first take-up roller and the second take-up roller. When the motor rotates, it drives the first take-up roller and the second take-up roller to rotate. A separation mechanism is provided at the end of the first transmission wheel away from the connecting ring. When the separation mechanism moves, it drives the first transmission wheel to move and separate from the connecting ring.

2. The waterproof grounding resistance online monitoring instrument according to claim 1, characterized in that, The end of the connecting ring away from the first take-up roller passes through the bottom side wall of the monitor body, and the connecting ring is rotatably connected to the monitor body. The end of the first transmission wheel away from the second take-up roller is slidably engaged with the inner side wall of the connecting ring. The motor is fixedly installed in the monitor body, and when the monitor body rotates, it drives the first transmission wheel and the connecting ring to rotate through the output end.

3. The waterproof grounding resistance online monitoring instrument according to claim 2, characterized in that, The guiding mechanism is provided in two sets. One set of guiding mechanism is located outside the first take-up roller and is corresponding to the first take-up roller. The other set of guiding mechanism is located between the second take-up roller and the first take-up roller and is corresponding to the second take-up roller.

4. The waterproof grounding resistance online monitoring instrument according to claim 3, characterized in that, The guiding mechanism includes a fixed column; the bottom of the fixed column is fixedly connected to the bottom of the inner wall of the housing. The fixed column is hollow, and a bidirectional lead screw is rotatably connected inside the fixed column. A reciprocating block is rotatably connected to the bidirectional lead screw. The end of the reciprocating block away from the bidirectional lead screw slides through the side wall of the fixed column. A guide block is fixedly connected to the end of the reciprocating block away from the bidirectional lead screw. When the first take-up roller and the second take-up roller rotate, they drive the bidirectional lead screw to rotate, and the reciprocating block moves up and down in the vertical direction between the fixed column and the bottom of the inner wall of the housing.

5. The waterproof grounding resistance online monitoring instrument according to claim 4, characterized in that, One set of bidirectional lead screws has a second transmission wheel fixedly connected to the top end of the first take-up roller, and another set of bidirectional lead screws has a first gear fixedly connected to the top end of the first take-up roller. A toothed ring is fixedly connected to the inner side wall of the first take-up roller, and a second gear meshes with the outer side of the first gear. The first gear is connected to the toothed ring through the second gear, and the bottom end of the second gear is rotatably connected to the separation mechanism. The separation mechanism is set on another set of fixed columns corresponding to the second take-up roller.

6. The waterproof grounding resistance online monitoring instrument according to claim 3, characterized in that, The separation mechanism includes two sets of fixed plates; the fixed plates are fixedly connected to one side of another set of guide mechanisms, and a limit block is fixedly connected to the end of the fixed plate away from the fixed column. A separation rod is slidably connected to the outside of the limit block. A connecting plate is fixedly connected to the bottom end of the separation rod. The end of the connecting plate away from the separation rod is fixedly connected to the bottom end of the first transmission wheel. The top end of the separation rod is rotatably connected to the bottom end of the second gear.

7. The waterproof grounding resistance online monitoring instrument according to claim 6, characterized in that, A transmission rack is rotatably mounted in the middle of the fixed plate. The separating rod has teeth that mesh with the transmission rack on the side near the side of the separating rod. Both sets of fixed columns have toothed plates slidably mounted on the side near the separating rod. The transmission rack meshes with the corresponding toothed plate on the other set of fixed columns. A limit plate is fixedly connected to the end of the toothed plate away from the transmission rack.

8. The waterproof grounding resistance online monitoring instrument according to claim 7, characterized in that, A push rod is slidably disposed inside the limiting plate. A clamping plate is fixedly connected to the end of the push rod away from the toothed plate. The clamping plate slides in cooperation with the inner wall of the limiting plate. The push rod and the inner wall of the limiting plate are elastically connected by a spring. A notch is opened on the side of the limiting plate near the toothed plate. A trigger block is slidably disposed at the bottom of the outer shell corresponding to the notch. A limiting buckle for locking and limiting the limiting plate is provided at the bottom of the outer shell.

9. A waterproof grounding resistance online monitoring instrument according to claim 8, characterized in that, A slider is fixedly connected to one end of the trigger block near the outer shell. The slider is slidably connected to the bottom side wall of the outer shell. A protrusion is fixedly connected to the bottom of the slider near the trigger block. The protrusion is slidably fitted to the bottom surface of the outer shell. A spring is provided between the opposite ends of the two sets of sliders.

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