Substation grounding resistance on-line monitoring device

Abstract

The utility model belongs to the technical field of resistance monitoring, and discloses a substation grounding resistance on-line monitoring device, comprising an on-line monitoring mechanism comprising a monitoring assembly and a grounding assembly; the monitoring assembly comprises a movable monitoring box, four supporting legs are installed below the monitoring box, and a group of insulating rubber universal wheels are installed at the lower end of each group of supporting legs. The power substation monitoring box can move to a required monitoring position in a power substation through the rubber universal wheels, after the monitoring box smoothly arrives at a specified monitoring position, the screw sleeve can drive the lifting plate to descend through rotation of the threaded screw rod, and then the two groups of probes synchronously descend and are inserted into soil; a worker only needs to connect the cable with the grounding resistance monitor in the monitoring box, the monitoring work of the grounding resistance can be started, the operation mode is simple and convenient, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to resistance monitoring technical field, especially relate to a substation grounding resistance on -line monitoring device. BACKGROUND

[0002] Grounding resistance on -line monitoring as the key means of guaranteeing the safe operation of substation can master the working condition of grounding system in real time, and it is of great significance to find potential safety hidden danger in time.

[0003] However, the current substation grounding resistance on -line monitoring device installation is very cumbersome, when installing, often need to dig the ground, bury the monitoring components in the ground and then cover, once the monitoring effect is not ideal, it is necessary to repeat the process of digging, installation, covering, which is not only cumbersome but also consumes manpower and material resources, this process often needs the cooperation of many people, consumes a lot of time, makes the overall work efficiency greatly discounted.

[0004] In order to solve the above problems, the application provides a substation grounding resistance on -line monitoring device. Utility model content

[0005] In view of the deficiency of prior art, the utility model aims at providing a substation grounding resistance on -line monitoring device, by pushing the monitoring box, it can move the required monitoring position in the substation by rubber universal wheel, when the monitoring box reaches the designated monitoring position successfully, through the rotation of the threaded screw rod, the screw sleeve will drive the lifting plate to descend, and then make two groups of probes descend and insert into the soil synchronously, the staff only needs to connect the cable with the grounding resistance monitor in the monitoring box, and then the monitoring work of grounding resistance can be started, the operation mode is simple and convenient, improves the work efficiency, and solves the problems in the above background technology.

[0006] The application adopts the following technical scheme to achieve the above purpose:

[0007] The utility model provides a kind of substation grounding resistance on-line monitoring device, comprising: on-line monitoring mechanism, including monitoring component and ground component;Monitoring component, including movable monitoring box, four around supporting legs are installed below the monitoring box, each group of supporting leg lower end is installed with a group of insulable rubber universal wheel, ground resistance monitor for measuring ground resistance data is equipped in the monitoring box;Ground component, including bottom frame, liftable lifting plate is equipped in the bottom frame, a group of probe for detecting voltage and current is respectively installed in the two sides of the lifting plate, threaded sleeve is installed in the middle of the lifting plate, and threaded sleeve is threadedly connected with threaded lead screw, linkage rod is installed below the probe, a group of auxiliary positioning drill is respectively installed in the two sides of the linkage rod, conical sleeve is equipped below the probe during its rising process to scrape surface soil.

[0008] As a preferred embodiment, the front of the monitoring box is connected with a box door through a hinge, and a battery is installed below the inside of the monitoring box, which is electrically connected with the ground resistance monitor, and a wiring port is formed at the back of the monitoring box.

[0009] As a preferred embodiment, the bottom frame is fixed below the monitoring box, a group of side sliding grooves are respectively formed in the two sides of the inside of the bottom frame, auxiliary sliding blocks are slidingly connected in the side sliding grooves, and the auxiliary sliding blocks are fixedly connected with the lifting plate.

[0010] As a preferred embodiment, the lower ends of the two groups of probes are sharp, and the lower ends of the two groups of probes penetrate through the bottom frame, the two groups of probes are current probes and voltage probes respectively, and the two groups of probes are electrically connected with the ground resistance monitor.

[0011] As a preferred embodiment, a driving motor is installed below the bottom frame, and the driving motor is electrically connected with the battery, the output shaft of the driving motor is fixedly connected with the threaded lead screw, and the upper end of the threaded lead screw is rotatably connected with the monitoring box.

[0012] As a preferred embodiment, the linkage rod is located below the bottom frame, the lower end of the auxiliary positioning drill is sharp, and the position of the lower end of the auxiliary positioning drill is lower than that of the lower end of the probe, and the auxiliary positioning drill is made of insulating engineering plastic.

[0013] As a preferred embodiment, the conical sleeve is made of rubber, a fixing ring is installed above the conical sleeve, a group of fixing connecting rods are respectively installed in the two sides of the fixing ring, and the upper ends of the fixing connecting rods are fixedly connected with the bottom frame.

[0014] After the above technical scheme is adopted, the utility model has the beneficial effects that:

[0015] By designing an online monitoring mechanism, the monitoring box can move to the required monitoring position in the transformer substation by rubber universal wheels, saving moving time and labor cost. When the monitoring box successfully reaches the designated monitoring position, the screw sleeve drives the lifting plate to descend through the rotation of the screw rod, and then the two groups of probes are synchronously lowered. In the process of the probe descending, the auxiliary positioning drill is first inserted into the soil through the linkage plate. The auxiliary positioning drill can realize the stable positioning of the device, effectively avoiding the movement of the monitoring box during the monitoring process. Subsequently, the probe is smoothly inserted into the soil, and the staff only needs to connect the cable with the grounding resistance monitor in the monitoring box to start the monitoring work of the grounding resistance, which is simple and labor-saving.

[0016] When the monitoring task is completed, the screw rod is reversed, and the probe and the auxiliary positioning drill are synchronously raised and separated from the soil. At this time, the staff can easily push the monitoring box to the next monitoring position to start a new monitoring work. In the process of the auxiliary positioning drill rising, it will pass through the conical sleeve arranged below the probe. The conical sleeve can scrape off the soil attached to the surface of the probe, realizing automatic cleaning of the probe, reducing the workload of manual cleaning and improving the work efficiency. Compared with the prior art, the problems of difficult transfer and complicated monitoring installation of the traditional monitoring device are solved, and the efficiency of the transformer substation grounding resistance monitoring work is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a whole structure schematic view of the transformer substation grounding resistance online monitoring device of the present application.

[0019] Figure 2 It is a structure schematic view of another view of the transformer substation grounding resistance online monitoring device of the present application.

[0020] Figure 3 It is a structure schematic view of the transformer substation grounding resistance online monitoring device of the present application.

[0021] Figure 4 It is a structure schematic view of the transformer substation grounding resistance online monitoring device of the present application.

[0022] Figure 5 It is a structure schematic view of the transformer substation grounding resistance online monitoring device of the present application. Figure 4 ​

[0023] In the diagram, 1. Monitoring component; 11. Monitoring box; 12. Box door; 13. Support leg; 14. Rubber caster wheel; 15. Grounding resistance monitor; 16. Battery; 17. Wiring port; 2. Grounding component; 21. Base frame; 22. Threaded screw; 23. Drive motor; 24. Probe; 25. Linkage rod; 26. Auxiliary positioning pin; 27. Conical sleeve; 28. Fixing ring; 29. ​​Fixing connecting rod; 210. Lifting plate; 211. Side sliding groove; 212. Auxiliary sliding block; 213. Threaded sleeve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1 to 5 As shown: A substation grounding resistance online monitoring device includes: an online monitoring mechanism, including a monitoring component 1 and a grounding component 2; the monitoring component 1 includes a movable monitoring box 11, with four support legs 13 installed below the monitoring box 11, and a set of insulated rubber casters 14 installed at the lower end of each set of support legs 13; the monitoring box 11 is equipped with a grounding resistance monitor 15 for measuring grounding resistance data; the grounding component 2 includes a base frame 21, with a liftable lifting plate 210 installed inside the base frame 21; a set of probes 24 for detecting voltage and current are installed on both sides of the lifting plate 210; a threaded sleeve 213 is installed in the middle of the lifting plate 210, and a threaded screw 22 is threadedly connected inside the threaded sleeve 213; a linkage rod 25 is installed below the probes 24; a set of auxiliary positioning pins 26 are installed on both sides of the linkage rod 25; and a conical sleeve 27 is provided below the probes 24 to scrape off surface soil during their ascent. The rubber caster wheel 14 itself has good insulation properties, which can electrically isolate the monitoring box 11 from the ground and prevent interference signals such as stray currents that may exist on the ground from being transmitted to the ground resistance monitor 15 through the monitoring box 11, thus ensuring the accuracy of the measurement results.

[0026] like Figures 1 to 4 As shown: The front of the monitoring box 11 is connected to the door 12 via a hinge, and a battery 16 is installed inside the lower part of the monitoring box 11. The battery 16 is electrically connected to the grounding resistance monitor 15, and a wiring port 17 is provided at the rear of the monitoring box 11.

[0027] like Figures 1 to 5As shown: the bottom frame 21 is fixed below the monitoring box 11, a group of side sliding grooves 211 are arranged on the both sides of the bottom frame 21, the auxiliary sliding blocks 212 are slidably connected in the side sliding grooves 211, and the auxiliary sliding blocks 212 are fixedly connected with the lifting plate 210.

[0028] As shown in the figure: Figures 1 to 4 As shown: the lower ends of the two groups of probes 24 are sharp, and the lower ends of the two groups of probes 24 penetrate the bottom frame 21, the two groups of probes 24 are current probes and voltage probes respectively, and the two groups of probes 24 are electrically connected with the grounding resistance monitor 15, the grounding resistance monitor 15 controls the current probe to inject a known alternating current into the soil around the grounding body, and the current flows into the earth to form an electric field. At the same time, the voltage probe measures the potential difference between the grounding body and the specific position. Finally, the grounding resistance monitor 15 calculates the grounding resistance value.

[0029] As shown in the figure: Figures 1 to 4 As shown: the driving motor 23 is installed below the bottom frame 21, and the driving motor 23 is electrically connected with the battery 16, the output shaft of the driving motor 23 is fixedly connected with the threaded lead screw 22, and the upper end of the threaded lead screw 22 is rotatably connected with the monitoring box 11.

[0030] As shown in the figure: Figures 1 to 4 As shown: the linkage rod 25 is located below the bottom frame 21, the auxiliary positioning drill 26 is sharp at the lower end, and the lower end of the auxiliary positioning drill 26 is lower than the lower end of the probe 24, the auxiliary positioning drill 26 is made of insulating engineering plastic, and the insulating engineering plastic has excellent insulation performance, which can avoid the auxiliary positioning drill 26 from forming a conductive path with the earth after being inserted into the soil, preventing the current in the soil from affecting the accuracy of the probe 24 measurement.

[0031] As shown in the figure: Figures 1 to 4 As shown: the conical sleeve 27 is made of rubber, the fixed ring 28 is installed above the conical sleeve 27, a group of fixed connecting rods 29 are installed on the both sides of the fixed ring 28, and the upper ends of the fixed connecting rods 29 are fixedly connected with the bottom frame 21.

[0032] In specific use, the working principle of the utility model is as follows:

[0033] In the on-line monitoring of the grounding resistance of a substation, the staff pushes the movable monitoring box 11, and adjusts the monitoring position flexibly by means of the rubber universal wheels 14 at the lower ends of the four legs 13 around the lower part of the monitoring box 11. After reaching the designated position, the drive motor 23 electrically connected with the battery 16 below the bottom frame 21 is started, the output shaft of the drive motor 23 drives the threaded screw rod 22 to rotate, the threaded screw rod 22 is threadedly connected with the threaded sleeve 213 in the middle of the lifting plate 210, and then the lifting plate 210 is lowered in the two side sliding grooves 211 inside the bottom frame 21 with the assistance of the auxiliary sliding blocks 212, and the two probes 24 for detecting voltage and current are synchronously lowered. During the lowering process, the auxiliary positioning rods 26 on the two sides of the linkage rod 25 below the probes 24 are firstly inserted into the soil by virtue of the design that the lower ends of the auxiliary positioning rods 26 are sharp and lower than the lower ends of the probes 24, and the positioning of the device is realized through the auxiliary positioning rods 26, so as to prevent the movement of the monitoring box 11 from affecting the monitoring. Then the probes 24 are inserted into the soil, the staff connects the grounding body to the grounding resistance monitor 15 through the connecting cable through the wiring port 17 at the back of the monitoring box 11, the two groups of probes 24, i.e. the current probe 24 and the voltage probe 24, start to work by forming an electrical connection with the soil and the grounding body, respectively detect the current and voltage related data, and transmit the data to the grounding resistance monitor 15, the grounding resistance monitor 15 calculates the value of the grounding resistance, and thus the measurement of the grounding resistance is completed. During the monitoring process, the box door 12 can be opened to check the grounding resistance monitor 15, after the monitoring is completed, the drive motor 23 is reversed, the threaded screw rod 22 is reversely rotated, the lifting plate 210 is lifted, the probes 24 and the auxiliary positioning rods 26 are synchronously lifted and separated from the soil, during the lifting process, the probes 24 pass through the conical sleeve 27 made of rubber and fixedly connected with the bottom frame 21 through the fixing ring 28 and the two fixing connecting rods 29, the conical sleeve 27 scrapes off the soil attached to the surface of the probes 24, and the cleaning is completed, then the staff can push the monitoring box 11 to the next monitoring position, and the above monitoring process is repeated.

[0034] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A substation grounding resistance on-line monitoring device, characterized in that, The utility model relates to a kind of online monitoring mechanism, including monitoring component (1) and ground component (2); Monitoring component (1) includes movable monitoring box (11), four around legs (13) are installed below the monitoring box (11), each set of legs (13) lower end is installed with a set of insulating rubber universal wheel (14), ground resistance monitor (15) for measuring ground resistance data is equipped in the monitoring box (11); Ground component (2) includes bottom frame (21), liftable lifting plate (210) is equipped in the bottom frame (21), a set of probe (24) for detecting voltage and current is respectively installed in the two sides of the lifting plate (210), threaded sleeve (213) is installed in the middle of the lifting plate (210), and threaded sleeve (213) is threadedly connected with threaded lead screw (22), linkage rod (25) is installed below the probe (24), a set of auxiliary positioning bar (26) is respectively installed in the two sides of the linkage rod (25), conical sleeve (27) is equipped below the probe (24) during its rising process to scrape surface soil. The front of the monitoring box (11) is connected with box door (12) by hinge, and battery (16) is installed below the inside of the monitoring box (11), the battery (16) is electrically connected with ground resistance monitor (15), and wiring port (17) is opened at the back of the monitoring box (11).

2. The substation grounding resistance on-line monitoring device of claim 1, wherein: The bottom frame (21) is fixed below the monitoring box (11), a set of side sliding grooves (211) is respectively opened in the two sides of the inside of the bottom frame (21), auxiliary sliding block (212) is slidably connected in the side sliding groove (211), and the auxiliary sliding block (212) is fixedly connected with the lifting plate (210).

3. The substation grounding resistance on-line monitoring device of claim 2, wherein: The lower end of the two sets of probe (24) is sharp, and the lower end of the two sets of probe (24) penetrates the bottom frame (21), the two sets of probe (24) are current probe and voltage probe respectively, and the two sets of probe (24) are electrically connected with ground resistance monitor (15).

4. The substation grounding resistance on-line monitoring device of claim 3, wherein: The driving motor (23) is installed below the bottom frame (21), and the driving motor (23) is electrically connected with the battery (16), the output shaft of the driving motor (23) is fixedly connected with the threaded lead screw (22), and the upper end of the threaded lead screw (22) is rotatably connected with the monitoring box (11).

5. A substation grounding resistance on-line monitoring device according to claim 4, characterized in that: The linkage rod (25) is located below the bottom frame (21), the lower end of the auxiliary positioning bar (26) is sharp, and the lower end position of the auxiliary positioning bar (26) is lower than the lower end position of the probe (24), the auxiliary positioning bar (26) is made of insulating engineering plastic.

6. The substation grounding resistance on-line monitoring device of claim 4, wherein: The conical sleeve (27) is made of rubber material, the fixed ring (28) is installed above the conical sleeve (27), a set of fixed connecting rods (29) is respectively installed in the two sides of the fixed ring (28), and the upper end of the fixed connecting rod (29) is fixedly connected with the bottom frame (21).

7. The substation grounding resistance on-line monitoring device of claim 1, wherein: ​

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