Portable Handheld Device for Rapid Detection of GIS Equipment Status

Abstract

The present invention relates to the technical field of detection devices, and particularly to a portable handheld device for rapidly detecting the state of GIS equipment, which includes a detection camera, a GIS detection tablet, an image analysis module, a data transmission module, and a fixed limit module. A monitoring block is formed by protruding at the end of the detection camera. A camera lens and a supplementary light are provided on the monitoring block. The monitoring block is fitted into a knife switch observation hole, and the camera lens and the supplementary light are respectively fitted into a supplementary light hole and a camera hole in the knife switch observation hole. According to the present invention, the whole process of the dynamic change of the knife switch position can be determined rapidly and accurately, and the confirmation time of the GIS knife switch position can reach within 15 seconds. Therefore, the isolation operation can be easily performed, and the problems that the opening and closing indication of the knife switch of the GIS equipment is inaccurate and it takes time to confirm the opening and closing position of the knife switch can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and particularly to a portable handheld device for rapidly detecting the state of GIS equipment.

Background Art

[0002] GIS equipment refers to "gas-insulated metal-enclosed switchgear", which is composed of a circuit breaker, disconnector, earthing switch, transformer, arrester, busbar, connector, outgoing terminal, etc. GIS is widely used not only in the high-voltage and extra-high-voltage fields, but also in the ultra-high-voltage field. Compared with the conventional open-type substation, GIS has the advantages of a compact structure, space saving, high reliability, flexible layout, convenient installation, high safety, strong environmental adaptability, and less maintenance work.

[0003] Some of the GIS knife switch devices used in conventional power plants are arranged in a closed chamber filled with an inert gas, and have the advantages of a compact structure, flexibility, maintenance-free, and not being affected by external environmental conditions. However, compared with the conventional open-type knife switch device, the GIS knife switch device lacks intuitiveness, and it is impossible to directly observe the contact situation of the contacts to determine whether the opening and closing of the contacts of the GIS knife switch are appropriate. Therefore, it is particularly important to quickly and accurately determine whether the switch-on of the GIS knife switch is appropriate during the operation of the knife switch.

[0004] When observing a GIS knife switch device, it is generally observed through the observation window of the knife switch installed outside the closed chamber. However, the observation window of the knife switch is usually installed at a high position of the closing device, and it is necessary to continuously observe to know that the power has run out. Therefore, after the operator uses a climbing frame to move to the position of the observation window of the knife switch, the operator realizes the detection operation by fitting the camera used for detection into the observation window of the knife switch. However, the connection between the camera used for detection and the observation window of the knife switch is fixed only by the friction caused by fitting, and the connection may become unstable during a long-term detection operation, and there is also a possibility of falling and colliding. Therefore, the camera may be damaged, which may hinder normal detection operations.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In order to make up for the drawbacks of the prior art and solve the above technical problems, a portable handheld device for rapid detection of the GIS equipment status has been proposed.

Means for Solving the Problems

[0006] The technical means adopted by the present invention to solve the above technical problems is a portable handheld device for rapid detection of the GIS equipment status, including a detection camera, a GIS detection tablet, an image analysis module, a data transmission module, and a fixed limit module. A monitoring block is formed by protruding at the end of the detection camera. A camera lens and a supplementary light are provided on the monitoring block. The monitoring block is fitted into the knife switch observation hole. The camera lens and the supplementary light are respectively fitted into the supplementary light hole and the camera hole in the knife switch observation hole. A protective cover is externally fitted and attached to the outside of the monitoring block.

[0007] The data transmission module transmits the image information captured by the detection camera to the GIS detection tablet, and the image analysis module is mounted on the GIS detection tablet to analyze the image information and determine the position change of the knife switch to be measured.

[0008] The fixed limit module assists in fixing the detection camera to the knife switch observation hole. The fixed limit module includes a limit sleeve, and the limit sleeve is cylindrical and covers the outside of the detection camera.

[0009] A snap ring is provided at the end of the limit sleeve. The snap ring covers the monitoring block. A fixed magnet is provided on the outer surface of the snap ring, and a part of the outer peripheral surface of the snap ring is formed of an elastic material.

[0010] Preferably, a sliding groove is provided inside the side wall of the limit sleeve at a portion close to the snap ring, and a pressing ring is installed in a ring-shaped opening close to the snap ring of the limit sleeve.

[0011] The vertical cross-section of the pressing ring is L-shaped. One end of the pressing ring is fitted into the sliding groove and is in sliding connection with the sliding groove, and the other end contacts the outer peripheral surface of the snap ring.

[0012] A limit cavity is formed in the region surrounded between the pressing ring and the snap ring. The inside of the outer peripheral portion of the snap ring is hollow to form a fixed cavity, and the limit cavity and the fixed cavity communicate with each other inside.

[0013] Preferably, a limit airbag is provided inside the limit cavity. The limit airbag is ring-shaped and communicates with the inside of the fixed cavity through a connecting tube. A control valve is provided in the middle of the connecting tube.

[0014] Preferably, a limit block is uniformly provided on the outer surface of the side wall of the fixed cavity, and the end of the limit block is inclined in a direction away from the camera hole.

[0015] Preferably, the pressing ring is provided with a vent hole at a portion facing the end surface of the knife switch observation hole, and the vent hole communicates with the inside of the fixed cavity.

[0016] Preferably, a seal ring is provided on the outer surface of the vent hole, and the seal ring is formed of an elastic material.

[0017] Preferably, the fixed magnet is provided on the outer surface of the snap ring, is located in the inner region of the limit cavity, and is distributed in a ring shape around the central axis of the limit sleeve.

[0018] Preferably, a fixed jaw is installed at a portion of the end of the limit sleeve located outside the pressing ring, and the fixed jaw is formed of an elastic material.

[0019] Preferably, anti-slip blocks are uniformly provided on the inner surface of the fixed jaw, and the anti-slip blocks have sharp ends and are formed of a rubber material.

[0020] Preferably, a cleaning rod is provided at the end of the limit sleeve away from the snap ring, a cleaning block is provided at the end of the cleaning rod, the cleaning block is configured in a disc shape, and the outer surface is covered with a cleaning sleeve.

[0021] The beneficial effects of the present invention are as follows.

[0022] 1. The portable handheld device for rapid detection of the GIS equipment status disclosed in the present invention has an elastic part located on the outer periphery of the snap ring in contact with the inner wall surface of the knife switch observation hole, and by increasing the relative frictional force, the snap ring can be more closely fitted inside the knife switch observation hole. Also, after the snap ring is fitted, the fixed magnet located on the outer surface of the snap ring and the inner wall of the iron-made knife switch observation hole attract each other, so that when monitoring, the snap ring can move the monitoring block and the entire detection camera, and be more stably coupled with the knife switch observation hole. Thereby, a more stable photographing platform is provided for the detection operation of the opening and closing of the knife switch device, ensuring the smooth progress of normal monitoring work.

[0023] 2. The portable handheld device for rapid detection of the GIS equipment status disclosed in the present invention can rapidly and accurately determine the whole process of the dynamic change of the knife switch position, and reach within 15 seconds the confirmation time of the GIS knife switch position. Therefore, the isolation operation can be easily performed, and the problems that the opening and closing indication of the knife switch of the GIS equipment is inaccurate and it takes time to confirm the opening and closing position of the knife switch can be avoided.

Brief Description of the Drawings

[0024] The present invention will be further described below with reference to the drawings.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0025] Hereinafter, based on the embodiments of the present invention, with reference to the drawings, the technical means in the present invention will be clearly and completely described. It is obvious that the described embodiments are only a part of the present invention and not all embodiments. Based on the embodiments in the present invention, all other embodiments that can be obtained by an ordinary technician in the technical field without creative effort also belong to the protection scope of the present invention.

[0026] (Embodiment 1) It is a portable handheld device for quickly detecting the state of GIS equipment. Some of the GIS knife switch devices used in conventional power plants are arranged in a closed chamber filled with inert gas, and have advantages such as a compact structure, flexibility, maintenance-free, and being unaffected by external environmental conditions. However, compared with the conventional open-type knife switch device, the GIS knife switch device lacks intuitiveness, and it is impossible to directly observe the contact situation of the contacts to determine whether the opening and closing of the contacts of the GIS knife switch are appropriate. Therefore, in the event that the opening and closing of the contacts are not appropriate, serious consequences may occur. Therefore, it is particularly important to quickly and accurately determine whether the switch-on of the GIS knife switch is appropriate during the operation of the knife switch.

[0027] When observing a GIS knife switch device, it is generally observed through the observation window of the knife switch installed outside the closed chamber. However, the observation window of the knife switch is usually installed at a high position of the closing device, and it is necessary to continuously observe to know that the power has run out. Therefore, after the operator uses the climbing frame to move to the position of the observation window of the knife switch, the operator realizes the detection work by fitting the camera used for detection into the observation window of the knife switch. However, the connection between the camera used for detection and the observation window of the knife switch is fixed only by the friction of fitting, and the connection may become unstable during the long-term detection work, and there is also a possibility of falling and colliding. Therefore, the camera may be damaged, which may interfere with the normal detection work.

[0028] In order to effectively solve the above problems, as shown in FIGS. 1-9, the present invention provides a portable handheld device for rapid detection of the state of GIS equipment, including a detection camera 1, a GIS detection tablet, an image analysis module, a data transmission module, and a fixed limit module 2. A monitoring block 11 is formed protruding at the end of the detection camera, and a camera lens 111 and a supplementary light 112 are provided on the monitoring block 11. The detection camera 1 employs a dedicated GIS camera as a detection end, and the detection camera 1 is adjusted according to the application side, that is, the position of the GIS knife switch device.

[0029] At the end of the detection camera 1, a camera lens 111 and a supplementary light 112 are arranged. Outside the monitoring block 11, a protective cover 113 for protecting the internal camera lens 111 and the supplementary light 112 is externally fitted and attached, and the protective cover 113 can be removed during work. The knife switch observation hole 3 is located outside the closed chamber where the GIS knife switch device is positioned as the application side. The knife switch observation hole 3 is provided with a supplementary light hole 31 and a camera hole 32. The supplementary light hole 31 and the camera hole 32 communicate with the inside of the closed chamber, and a closed glass is installed at the joining part to perform the detection work while ensuring the airtightness inside the closed chamber. When the monitoring block 11 is fitted into the knife switch observation hole 3, the camera lens 111 and the supplementary light 112 can be respectively fitted into the supplementary light hole 31 and the camera hole 32 in the knife switch observation hole 3, and the GIS knife switch device inside the closed chamber can be observed and detected through the closed glass.

[0030] The camera lens 111 can photograph the operating state of the GIS knife switch device inside the closed chamber through the knife switch observation hole 3. As the supplementary light 112, an LED light is adopted. When starting, the supplementary light 112 illuminates the inside of the closed chamber through the closed glass, creating a working environment with appropriate brightness inside the closed chamber, so that the photographing work can be facilitated.

[0031] At the other end of the detection camera 1, a data jack is provided for connecting a data cable to perform wired data transmission. The captured video data can be transmitted more stably, and the internal battery can also be charged. In addition, the detection camera 1 is equipped with a control button for adjusting the brightness of the supplementary light 112 and functions such as starting / stopping the detection camera 1, enabling the operator to easily adjust according to the usage environment and improving the adaptability of the detection camera 1 to the working environment.

[0032] The data transmission module transmits the image information captured by the detection camera 1 to the GIS detection tablet. The operator holds the GIS detection tablet below the device for observation. The image analysis module is mounted on the GIS detection tablet and analyzes the distributed image information to determine the position change of the knife switch to be measured.

[0033] The fixed limit module 2 assists in fixing the detection camera 1 to the knife switch observation hole 3. The fixed limit module 2 includes a limit sleeve 21. The limit sleeve 21 is cylindrical and covers the outside of the detection camera 1. A material with an electromagnetic shielding effect may be used on the side wall of the limit sleeve 21, which can reduce the adverse effects on the normal operation inside the detection camera 1 under a high electromagnetic environment and also has the effect of protecting the detection camera 1. Also, when there is a possibility of collision during installation, it reduces the damage of the detection camera 1.

[0034] Vent holes communicating with the internal and external environments of the limit sleeve 21 are uniformly arranged at the end of the detection camera 1 away from the knife switch observation hole 3, which has the effect of cooling the internal detection camera 1 by air exchange. Also, a non-electromagnetic shielding material is used at the end of the detection camera 1 away from the knife switch observation hole 3, and the transmission end of the detection camera 1 is also provided here. Therefore, it is easier for the image signal to be wirelessly transmitted through the vent hole and transmitted to the GIS detection tablet.

[0035] A snap ring 22 is provided at the end of the limit sleeve 21. The snap ring 22 covers the monitoring block 11. The end of the snap ring 22 is extended and protrudes from the end of the monitoring block 11. When it is fitted into the knife switch observation hole 3, the snap ring 22 is fitted into the knife switch observation hole 3 before the end of the monitoring block 11. And a fixed magnet 23 is provided on the outer surface of the snap ring 22. The inner peripheral part of the snap ring 22 is composed of a hard material and plays a role in protecting the monitoring block 11. The outer peripheral surface part of the snap ring 22 is composed of an elastic material such as a rubber material.

[0036] The specific process of the operation is as follows. When it is necessary to turn on or off the GIS knife switch of the important power storage equipment located in the power storage station, the operator uses a climbing frame, ladder, etc. to move to the position where the knife switch observation hole 3 is located on the closed chamber. Then, holding the limit sleeve 21, the snap ring 22 protruding from the end of the limit sleeve 21 is fitted into the knife switch observation hole 3, so that the monitoring block 11 can be fitted into the knife switch observation hole 3. By fitting the supplementary light 112 and the camera lens 111 on the monitoring block 11 into the supplementary light hole 31 and the camera hole 32 respectively, the subsequent detection work becomes easier.

[0037] When fitting, the end of the snap ring 22 located on the outer surface of the monitoring block 11 and externally fitted is fitted into the knife switch observation hole 3 ahead of the monitoring block 11 and contacts the inner wall surface of the knife switch observation hole 3. Then, since the snap ring 22 is fitted along the extending direction inside the knife switch observation hole 3, the monitoring block 11 receives a limiting action before being fitted and is fitted along a stable movement track.

[0038] Similarly, when taking out the detection camera 1, before the snap ring 22 slides out completely, the monitoring block 11 will already be detached from the knife switch observation hole 3 along a stable sliding track. In this way, when the monitoring block 11 moves along a stable sliding track, when manually fitting, due to insufficient limitation, when the monitoring block 11 is fitted or taken out, lateral swaying occurs inside the knife switch observation hole 3, and the collision between the fitted monitoring block 11, the supplementary light 112 and the camera lens 111 on it and the inner wall of the knife switch observation hole 3 is reduced. Also, according to the above method, the collision and damage between the fitted monitoring block 11, the supplementary light 112 and the camera lens 111 on it and the inner wall of the knife switch observation hole 3 caused by swaying are effectively reduced.

[0039] Furthermore, during fitting and installation, the elastic part located on the outer periphery of the snap ring 22 and the inner wall surface of the knife switch observation hole 3 are brought into contact with each other, and by increasing the relative frictional force, the snap ring 22 can be more closely fitted inside the knife switch observation hole 3. Also, after the snap ring 22 is fitted, the fixing magnet 23 located on the outer surface of the snap ring 22 and the inner wall of the iron-made knife switch observation hole 3 attract each other, so that during monitoring, the snap ring 22 can move the monitoring block 11 and the detection camera 1 as a whole, and be more stably coupled with the knife switch observation hole 3. Thereby, a more stable shooting platform is provided for the detection operation of the opening and closing of the knife switch device, ensuring the smooth progress of normal monitoring operations.

[0040] After the detection camera 1 is installed, the supplementary lighting light 112 is activated. After the light illuminates the inside of the closed chamber through the corresponding closing glass, the camera lens 111 takes pictures of the state inside the closed chamber through the closing glass of the camera hole 32. In the process when the knife switch starts, the iron rod-shaped movable contact extends out and contacts the corresponding fixed contact, and the switch-on and power-on are completed. In this process, the detection camera 1 takes pictures of the images in the process of switch-on and transmits them to the GIS detection tablet, allowing the operator to easily observe, and the image analysis module installed on the GIS detection tablet can analyze the images.

[0041] Specifically, the GIS knife switch state intelligent identification application (APP) provided in the image analysis module, when activated, can automatically identify and display the opening and closing state of the GIS knife switch by using an AI algorithm. The opening and closing state of the GIS knife switch is upgraded to be automatically identified by the system without the user having to visually confirm, improving the identification accuracy and increasing the user's work efficiency by more than 80%.

[0042] To detect in real time whether the switch-on of a knife switch is appropriate, deep learning and semantic segmentation technologies can be used to combine multi-stage exposure algorithms. Here, the semantic segmentation algorithm is quantified by NCNN. Then, through a large amount of pruning and model compression technologies, the deep learning segmentation algorithm is deployed to a GIS detection tablet.

[0043] Here, the latest Pyramid Scene Parsing Network (PSPNet) is used in the segmentation model. As a result of optimization, the minimum detection accuracy is 10% of the length of the knife switch, and the detection speed is 2 seconds per time.

[0044] This application also supports the function of activating the AI identification function to detect in real time whether there is damage to the knife switch when previewing the video in real time. After the knife switch is in the appropriate position, the edge features of the knife switch are extracted using the feature extraction technology of deep learning. After the edge extraction by deep learning, the distribution of all line segments is statistically analyzed using the differential gradient statistical algorithm. It is determined whether there is damage to the edge part to achieve the purpose of detection. The minimum damaged area to be detected is 5% of the viewing area of the knife switch, and the detection time is 2 seconds per time. If damage is discovered, an alarm is immediately issued to notify the observer to pay attention and not approach, and at the same time, the maintenance personnel are notified to cut off the power, inspect, and maintain the equipment.

[0045] Also, by activating the AI identification function when previewing the video in real time, it is possible to detect in real time whether there is a blockage of foreign objects in the slot. If a foreign object is blocking before the switch is turned on, damage to the knife switch can be prevented. The HSV color extraction algorithm is used for this detection item to extract the color from the background. As a template image, the color is extracted from the image detected in real time using the HSV algorithm again at the time of detection, and finally the difference is taken with the template image to obtain a difference energy map, and finally the abnormal area is extracted by the self-adaptive binarization technique. The minimum foreign object detection diameter of this algorithm is 20% of the length of the knife switch, and the detection time is 1 second per time.

[0046] With this algorithm, the highly glossy surface of the protruding part of the iron rod-shaped movable contact and the color of the plastic of the protective protruding surface can be identified. During the process of switching on, by observing the position change of the above-mentioned colored part, the length that the iron rod-shaped movable contact extends and the position where it penetrates into the fixed contact can be determined, and it is possible to accurately determine whether the switching on is appropriate.

[0047] This application can stably capture the operating process of the GIS knife switch device in the closed chamber, quickly and accurately determine the whole process of the dynamic change of the knife switch position, and reach the confirmation time of the GIS knife switch position within 15 seconds. Therefore, the isolation operation can be easily performed, and the problems that the opening and closing indication of the knife switch of the GIS device is inaccurate and it takes time to confirm the opening and closing position of the knife switch can be avoided.

[0048] (Example 2) Based on Embodiment 1, as shown in FIGS. 1 to 8 of the specification, a sliding groove 211 is provided inside the side wall of the limit sleeve 21 at a portion close to the snap ring 22. A pressing ring 24 is installed at a ring-shaped opening where the limit cavity 241 is close to the snap ring 22. The vertical cross-section of the pressing ring 24 is L-shaped. One end of the pressing ring 24 is fitted into the sliding groove 211 and is slidably connected to the sliding groove 211 by a reset spring. The other end of the pressing ring 24 contacts the outer peripheral surface of the snap ring 22. A region surrounded between the pressing ring 24 and the snap ring 22 forms the limit cavity 241. The inside of the outer peripheral portion of the snap ring 22 is hollowed out to form a fixed cavity 221. The limit cavity 241 and the fixed cavity 221 communicate with each other inside.

[0049] The specific working process is as follows. Based on the specific working process of Embodiment 1, in order to ensure that the detection camera 1 can be easily attached and detached during work, the diameter of the outer peripheral surface of the snap ring 22 can be set smaller than the inner diameter of the knife switch observation hole 3. In this way, after the snap ring 22 is fitted into the knife switch observation hole 3 together with the monitoring block 11, a gap is maintained between the outer peripheral surface of the snap ring 22 and the inner wall of the knife switch observation hole 3.

[0050] Subsequently, the operator pushes and moves the limit sleeve 21 so that the limit sleeve 21 can be further fitted deeper into the knife switch observation hole 3. At this time, the limit sleeve 21 abuts against the pressing ring 24 on the end surface of the knife switch observation hole 3 and slides under pressure. The end of the pressing ring 24 fitted into the sliding groove 211 further presses the reset spring and is fitted into the sliding groove 211. As a result, the internal space of the limit cavity 241 decreases. The air inside the limit cavity 241 flows into the fixed cavity 221 on the outer periphery of the snap ring 22, and the fixed cavity 221 expands due to the increase in the internal air pressure. By the outer periphery of the snap ring 22 corresponding to the fixed cavity 221 expanding and closely contacting the inner wall surface of the knife switch observation hole 3, the relative frictional force between the snap ring 22 and the inner wall of the knife switch observation hole 3 is increased, and the installation of the limit sleeve 21 is further stabilized.

[0051] Furthermore, a control valve is provided at the joint between the limit cavity 241 and the fixed cavity 221, thereby controlling the inflow of air into the fixed cavity 221 to realize the expansion of the fixed cavity 221. After the snap ring 22 and the knife switch observation hole 3 are clamped to each other, the control valve operates to cut off the communication part, ensuring the degree of expansion of the fixed cavity 221, further stabilizing the fitting of the limit sleeve 21, and during the progress of the monitoring operation, the detection camera 1 maintains relative stability with the knife switch observation hole 3, and the monitoring operation of the knife switch device is smoothly carried out.

[0052] Furthermore, when removal is necessary, by simply controlling the opening of the control valve from the outside, the air flow in the fixed cavity 221 is reversed into the limit cavity 241, reducing the relative frictional force between the snap ring 22 and the inner wall of the knife switch observation hole 3. At the same time, the air pressure inside the limit cavity 241 is increased, pressing the pressing ring 24 and moving it in a direction away from the knife switch observation hole 3, thereby driving the monitoring block 11 to slide away from the knife switch observation hole 3. As a result, the removal of the detection camera 1 becomes easy, and it can be prevented that the detection camera 1 is damaged by being manually and roughly pulled out. Thereby, the attachment and removal of the detection camera 1 to and from the knife switch observation hole 3 are further automated, becoming more convenient, and the situations where attachment and removal become problematic due to human errors are reduced.

[0053] (Example 3) Based on Example 2, as shown in FIGS. 6-7 of the specification drawings, a limit airbag 25 is provided inside the limit cavity 241. The limit airbag 25 is ring-shaped, and the limit airbag 25 communicates with the inside of the fixed cavity 221 via a connection tube 251. A control valve is provided in the middle of the connection tube 251. A limit block 222 is provided on the outer surface of the side wall of the fixed cavity 221. Specifically, the limit block 222 is uniformly distributed on the portion corresponding to the fixed cavity 221 on the outer surface of the snap ring 22, and an elastic material such as rubber can be selected. The end of the limit block 222 is inclined in a direction away from the camera hole 32.

[0054] The specific working process is as follows. Based on the specific working process of Embodiment 2, in order to further ensure that the airflow inside the limit cavity 241 smoothly flows into the fixed cavity 221, a limit airbag 25 is provided inside the limit cavity 241. When the pressing ring 24 slides, it abuts against and presses the limit airbag 25, and the limit airbag 25 receives pressure and allows the airflow to flow into the fixed cavity 221 through the connection tube 251 connected to the fixed cavity 221. By controlling the internal expansion of the fixed cavity 221, the snap ring 22 is fixed. In this way, the highly airtight limit airbag 25 can prevent the airflow inside the limit cavity 241 from receiving pressure and flowing out through the connection gap of the pressing ring 24, thus preventing it from affecting the air pressure control.

[0055] Furthermore, when removing, closing the control valve via an external control device causes the airflow in the fixed cavity 221 to flow backward and into the limit airbag 25 inside the limit cavity 241 through the connection tube 251. As a result, the limit airbag 25 expands and presses the pressing ring 24, and the pressing ring 24 moves the end surface of the knife switch observation hole 3, and conversely, the end of the detection camera 1 slides out, making it easier to separate the detection camera 1 from the knife switch observation hole 3. And because the airtightness of the limit airbag 25 is high, it is possible to choose to fill the inside of the limit airbag 25 with liquid. Since the compressibility of the liquid is low, after passing through the fixed cavity 221, further expanding the fixed cavity 221 more significantly makes the fitting between the snap ring 22 and the knife switch observation hole 3 tighter. When monitoring, the connection between the detection camera 1 and the knife switch observation hole 3 becomes more stable, and the monitoring work is carried out more smoothly.

[0056] Furthermore, a limit block 222 is uniformly provided at a portion corresponding to the fixed cavity 221 on the outer surface of the snap ring 22, and the end portion is set to be inclined. As a result, after the fixed cavity 221 expands, the end portion of the limit block 222 contacts the inner wall portion of the knife switch observation hole 3 due to the action of the expansion, and is tightly coupled to the inner wall portion, thereby further ensuring the stability of the detection camera 1 during installation and enabling the monitoring operation to be smoothly performed.

[0057] (Example 4) Based on Example 3, as shown in FIGS. 6 to 7 of the specification drawings, an air vent hole 242 is provided in a portion of the pressing ring 24 that faces the end surface of the knife switch observation hole 3, and the air vent hole 242 communicates with the inside of the fixed cavity 221. A seal ring 243 is installed on the outer surface of the air vent hole 242, and the seal ring 243 is formed of an elastic material.

[0058] The specific working process is as follows. Based on the specific working process of Example 3, after the detection camera 1 is attached to the knife switch observation hole 3, the portion where the air vent hole 242 is installed in the pressing ring 24 is in close contact with the end surface of the knife switch observation hole 3. When the pressing ring 24 is pushed, the limit airbag 25 inside the pressing ring 24 receives pressure and its volume decreases, and the volume of the internal space of the pressing ring 24 decreases. When the pressing is completed, the end portion located in the sliding groove 211 of the pressing ring 24 tends to be reset by the action of the connected reset spring, and when the pressing ring 24 is reset, the internal space increases, but the air pressure decreases, so it is necessary to replenish the air flow between the air vent hole 242 and the outside world.

[0059] The seal ring 243 provided on the outer peripheral surface of the air vent hole 242 improves the sealing performance of the air vent hole 242 and makes it difficult for external airflows to enter. Due to the negative pressure effect in the limit cavity 241 inside the pressing ring 24, the end surface of the knife switch observation hole 3 in contact with the air vent hole 242 is attracted to each other and tightly fixed. Therefore, a more stable connection between the limit sleeve 21 and the knife switch observation hole 3 is further ensured. When removal is necessary, by simply returning the airflow inside the limit airbag 25, the inflated limit airbag 25 extrudes the air inside the limit cavity 241 from the air vent hole 242, and the negative pressure effect is released, separating the end of the knife switch observation hole 3 in contact with the pressing ring 24 and facilitating the removal of the detection camera 1. This can reduce damage to the detection camera 1 caused by manual operation.

[0060] (Example 5) Based on Example 4, as shown in FIGS. 6-7 of the specification drawings, the fixed magnet 23 is provided on the outer surface of the snap ring 22, located in the internal region of the limit cavity 241, and the fixed magnet 23 is distributed in a ring shape around the central axis of the limit sleeve 21.

[0061] The specific working process is as follows. Based on the specific working process of Example 4, when the monitoring block 11 is first inserted into the knife switch observation hole 3 and is not stable, due to the magnetic attraction between the fixed magnet 23 located on the snap ring 22 on the outer periphery of the monitoring block 11 and the inner wall of the knife switch observation hole 3, the fixed magnet 23 moves in a direction approaching the inner wall of the knife switch observation hole 3, and the monitoring block 11 is moved to collide with the inner wall of the knife switch observation hole 3 while swaying on both sides, making each component of the monitoring block 11 more likely to be damaged. Therefore, in the initial state setting, the fixed magnet 23 is installed on the upper surface of the snap ring 22, located inside the fixed cavity 221, and is subject to the shielding effect of the pressing ring 24. The pressing ring 24 is made of an electromagnetic shielding material and can limit the magnetic attraction between the fixed magnet 23 and the inner wall of the knife switch observation hole 3.

[0062] When the monitoring block 11 and the snap ring 22 are stably fitted into the knife switch observation hole 3, the pressing ring 24 slides, and the fixed magnet 23 located on the outer peripheral surface of the snap ring 22 is exposed to exert a limit fixing function by magnetic attraction. At this time, under the action of the snap ring 22 and the fixed cavity 221, the distance between the monitoring block 11 and the knife switch observation hole 3 is stably maintained, and due to the protrusion of the position where the fixed cavity 221 is located, a gap is maintained between the exposed fixed magnet 23 and the inner wall of the corresponding knife switch observation hole 3, so that the fixing function by magnetic attraction is exerted, and the damage caused by the collision between the monitoring block 11 and the inner wall of the knife switch observation hole 3 can be prevented. Also, in the process of removal, because there is a gap, the fixed magnet 23 and the inner wall of the knife switch observation hole 3 do not come into direct contact, so the frictional resistance received when the snap ring 22 slides out is reduced, thereby making the installation and removal of the detection camera 1 smoother.

[0063] (Example 6) Based on Example 5, as shown in the specification drawings 4 to 7, at the end of the limit sleeve 21, a fixed jaw 26 is installed at a portion located outside the pressing ring 24, and the fixed jaw 26 is formed of an elastic material. Also, anti-slip blocks 261 are uniformly installed on the inner surface of the fixed jaw 26, and the anti-slip blocks 261 have sharp ends and are formed of a rubber material.

[0064] The specific working process is as follows. Based on the specific working process of Example 5, in the initial state, the end of the fixed jaw 26 is close to the end of the pressing ring 24. During the installation process, when the pressing ring 24 receives pressure and contracts, the fixed jaw 26 protrudes relative to the end of the knife switch observation hole 3. Since the end where the knife switch observation hole 3 is located protrudes with respect to the closed chamber, the similarly protruding fixed jaw 26 is fitted onto the outer peripheral surface of the end of the knife switch observation hole 3. A magnet with a weaker magnetic force than the fixed magnet 23 can be provided at the end of the fixed jaw 26, and the end of the fixed jaw 26 is brought close to and in close contact with the outer peripheral surface of the knife switch observation hole 3. Also, by the anti-slip block 261 being in close contact with the outer peripheral surface as well, the fixed jaw 26 is driven to clamp the detection camera 1 and the end protrusion of the knife switch observation hole 3 together, further ensuring the limit fixing effect received by the detection camera 1.

[0065] (Example 7) Based on Example 6, as shown in Drawings 1 - 6 of the specification, a cleaning rod 27 is provided at the end of the limit sleeve 21 away from the snap ring 22, a cleaning block 271 is provided at the end of the cleaning rod 27, and the cleaning block 271 is configured in a disc shape. The surface of the cleaning block 271 is 2 - 3 mm smaller than the camera hole 32, and the outer surface is covered with a cleaning sleeve 272, and chemical fiber or cotton cloth is used for the cleaning sleeve.

[0066] The specific operation process is as follows. Based on the specific operation process of Embodiment 3, in an electromagnetic environment, external dust may adhere to the closed glass corresponding to the inside of the camera hole 32 due to electrostatic action. Therefore, before starting the monitoring operation, first lift the limit sleeve 21, fit the cleaning rod 27 into the knife switch observation hole 3, and attach the surface of the cleaning sleeve 272 to the cleaning liquid. The cleaning liquid can select a cleaning agent for the electric switch device, which can avoid adverse effects on the device. By rotating the cleaning rod 27, the cleaning sleeve wipes the surface of the closed glass. By cleaning the dust that may adhere, the closed glass is kept clean, the image captured by the detection camera 1 becomes clearer, and the judgment result becomes more accurate.

[0067] As described above, the basic principle, main features, and advantages of the present invention have been disclosed and explained. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. What has been described in the foregoing embodiments and the specification is only to explain the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention can be further modified and improved in various ways, and all of these modifications and improvements are included in the protection scope of the present invention. The protection scope of the present invention is defined by the scope of the appended claims and their equivalents.

Description of Reference Numerals

[0068] 1 Detection camera, 11 Monitoring block, 111 Camera lens, 112 Supplementary light, 113 Protection cover, 2 Fixed limit module, 211 Sliding groove, 21 Limit sleeve, 22 Snap ring, 221 Fixed cavity, 222 Limit block, 23 Fixed magnet, 24 Pressing ring, 241 Limit cavity, 242 Vent hole, 243 Sealing ring, 25 Limit airbag, 251 Connecting tube, 26 Fixed joist, 261 Anti-slip block, 27 Cleaning rod, 271 Cleaning block, 272 Cleaning sleeve, 3 Knife switch observation hole, 31 Supplementary light hole, 32 Camera hole

Claims

1. A portable handheld device for rapid detection of GIS equipment status, comprising: a detection camera (1), a GIS detection tablet, an image analysis module, a data transmission module, and a fixed limit module (2); a monitoring block (11) is formed by protruding at the end of the detection camera (1), a camera lens (111) and a supplementary light (112) are provided on the monitoring block (11), the monitoring block (11) is fitted into a knife switch observation hole (3), the camera lens (111) and the supplementary light (112) are respectively fitted into a supplementary light hole (31) and a camera hole (32) in the knife switch observation hole (3), and a protective cover (113) is externally fitted and attached to the outside of the monitoring block (11); the data transmission module transmits the image information captured by the detection camera (1) to the GIS detection tablet, the image analysis module is mounted on the GIS detection tablet, analyzes the image information, and determines the position change of the knife switch to be measured; the fixed limit module (2) assists in fixing the detection camera (1) to the knife switch observation hole (3), the fixed limit module (2) includes a limit sleeve (21), the limit sleeve (21) is cylindrical and covers the outside of the detection camera (1); a snap ring (22) is provided at the end of the limit sleeve (21), the snap ring (22) covers the monitoring block (11), a fixed magnet (23) is provided on the outer surface of the snap ring (22), and a part of the outer peripheral surface of the snap ring (22) is formed of an elastic material. A portable handheld device for rapid detection of GIS equipment status, characterized in that.

2. A sliding groove (211) is provided in a part of the inner side wall of the limit sleeve (21) close to the snap ring (22), and a pressing ring (24) is installed in a ring-shaped opening close to the snap ring (22) on the limit sleeve (21); the vertical cross-section of the pressing ring (24) is L-shaped, one end of the pressing ring (24) is fitted into the sliding groove (211) and is in sliding connection with the sliding groove (211), and the other end contacts the outer peripheral surface of the snap ring (22). The area surrounded between the pressing ring (24) and the snap ring (22) forms a limit cavity (241), the interior of the outer peripheral portion of the snap ring (22) is hollow to form a fixed cavity (221), and the limit cavity (241) and the fixed cavity (221) communicate with each other inside. The portable handheld device for rapid detection of the GIS device state according to claim 1, characterized in that.

3. A limit airbag (25) is provided inside the limit cavity (241), the limit airbag (25) is ring-shaped, communicates with the inside of the fixed cavity (221) through a connection tube (251), and a control valve is provided in the middle of the connection tube (251). The portable handheld device for rapid detection of the GIS device state according to claim 2, characterized in that.

4. Limit blocks (222) are uniformly provided on the outer surface of the side wall of the fixed cavity (221), and the ends of the limit blocks (222) are inclined in a direction away from the camera hole (32). The portable handheld device for rapid detection of the GIS device state according to claim 3, characterized in that.

5. The pressing ring (24) is provided with a vent hole (242) at a portion facing the end surface of the knife switch observation hole (3), and the vent hole (242) communicates with the inside of the fixed cavity (221). The portable handheld device for rapid detection of the GIS device state according to claim 2, characterized in that.

6. A seal ring (243) is provided on the outer surface of the vent hole (242), and the seal ring (243) is formed of an elastic material. The portable handheld device for rapid detection of the GIS device state according to claim 5, characterized in that.

7. The fixed magnet (23) is provided on the outer surface of the snap ring (22), is located in the internal area of the limit cavity (241), and is distributed in a ring shape around the central axis of the limit sleeve (21). The portable handheld device for rapid detection of the GIS device state according to claim 2, characterized in that.

8. At the end of the limit sleeve (21), a fixed jaw (26) is installed at a portion located outside the pressing ring (24), and the fixed jaw (26) is formed of an elastic material. The portable handheld device for rapid detection of the GIS device state according to claim 7, characterized in that.

9. On the inner surface of the fixed jaw (26), a non-slip block (261) is uniformly provided. The non-slip block (261) has a sharp end and is formed of a rubber material. The portable handheld device for rapid detection of the GIS device state according to claim 8, characterized in that.

10. A cleaning rod (27) is provided at the end of the limit sleeve (21) away from the snap ring (22). A cleaning block (271) is provided at the end of the cleaning rod (27). The cleaning block (271) is configured in a disc shape, and the outer surface is covered with a cleaning sleeve (272). The portable handheld device for rapid detection of the GIS device state according to claim 9, characterized in that.

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