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 quickly detecting the status of GIS equipment.

Background Art

[0002] GIS equipment refers to "gas-insulated metal-enclosed switchgear", which is composed of a circuit breaker, disconnecting switch, 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, and maintenance-free operation, and are not 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 status of the contacts and 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 switching on of the GIS knife switch is appropriate during the operation of the knife switch.

[0004] When observing a GIS knife switch device, observation is generally performed through an observation window on the outside of the enclosed chamber. However, the observation window is usually located high up on the enclosed device, and continuous observation is necessary to determine when the power has run out. Therefore, the operator uses a climbing frame to move to the location of the knife switch observation window and then inserts the camera used for measurement into the observation window to perform the detection work. However, the connection between the camera used for measurement and the knife switch observation window is fixed only by friction from being inserted, and the connection may become unstable during prolonged detection work, and there is also a possibility of it being dropped and colliding. As a result, the camera may be damaged, which may interfere with normal detection work. [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] To overcome the shortcomings of the prior art and solve the aforementioned technical problems, the present invention proposes a portable handheld device for rapid detection of GIS equipment status. [Means for solving the problem]

[0006] The present invention employs a technical means to solve the above technical problems, which is a portable handheld device for rapid detection of the state of a GIS device, comprising a detection camera, a GIS detection tablet, an image analysis module, a data transmission module, and a fixed limit module, wherein a monitoring block is formed protruding from the end of the detection camera, the monitoring block is provided with a camera lens and a supplemental light, the monitoring block is fitted into a knife switch observation hole, the camera lens and supplemental light are fitted into a supplemental light hole and a camera hole in the knife switch observation hole, respectively, and a protective cover is fitted to the outside of the monitoring block.

[0007] The data transmission module transmits image information captured by the detection camera to the GIS detection tablet, and the image analysis module, mounted on the GIS detection tablet, analyzes the image information to 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, and the fixed limit module includes a limit sleeve, which 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 the outer peripheral surface of the snap ring is made of an elastic material.

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

[0011] The vertical cross-section of the pressing ring is L-shaped, with one end of the pressing ring fitted into the sliding groove and slidably connected to the sliding groove, and the other end in contact with the outer surface of the snap ring.

[0012] A limit cavity is formed in the region enclosed between the pressing ring and the snap ring, and a fixed cavity is formed inside the outer circumference of the snap ring by making it hollow, and the limit cavity and the fixed cavity are in communication with each other.

[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 via a connecting tube, and a control valve is provided in the middle of the connecting tube.

[0014] Preferably, limit blocks are uniformly provided on the outer surface of the side wall of the fixed cavity, and the ends of the limit blocks are inclined away from the camera hole.

[0015] Preferably, the pressing ring is provided with a vent hole in the 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 sealing ring is provided on the outer surface of the vent hole, and the sealing ring is made of an elastic material.

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

[0018] Preferably, a fixed jaw is provided at the end of the limit sleeve in a portion located outside the pressing ring, and the fixed jaw is made 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 are made of rubber material with sharp edges.

[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 this 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 contacting with the inner wall surface of the knife switch observation hole, increasing the relative frictional force, so that 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 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 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, reaching within 15 seconds for the confirmation time of the GIS knife switch position. Therefore, the isolation operation can be easily performed, avoiding 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.

Brief Description of the Drawings

[0024] The following further describes the present invention with reference to the drawings. [Figure 1] Figure 1 is a perspective view of the present invention. [Figure 2] Figure 2 is a partial enlarged view of location A in Figure 1. [Figure 3] Figure 3 is a schematic view of a part of the knife switch observation hole to which the present invention is applied. [Figure 4] Figure 4 is a perspective view of the present invention. [Figure 5] Figure 5 is a perspective view of the pressing ring according to the present invention. [Figure 6] Figure 6 is a half cross-sectional view of the connection of the present invention with the knife switch observation hole. [Figure 7]Figure 7 is a magnified view of a portion of location B in Figure 6. [Figure 8] Figure 8 is a perspective view of the detection camera according to the present invention. [Figure 9] Figure 9 shows a flowchart of the operations after the invention has been activated. [Modes for carrying out the invention]

[0025] The technical means in the present invention will now be clearly and completely described below with reference to the drawings, based on embodiments of the present invention. It is clear that the embodiments described are only a part of the present invention and not all embodiments. Based on the embodiments of the present invention, all other embodiments that can be obtained by an ordinary person skilled in the art without creative effort are also within the scope of the present invention.

[0026] (Example 1) This is a portable handheld device for rapid detection of GIS equipment status. Conventional GIS knife switch devices used in some power plants are housed in a closed chamber filled with inert gas, and have advantages such as a compact structure, flexibility, maintenance-free operation, and immunity to external environmental conditions. However, compared to conventional open-type knife switch devices, GIS knife switch devices lack intuitiveness, and it is not possible to directly observe the contact status of the contacts to determine whether the opening and closing of the GIS knife switch contacts is appropriate. Therefore, if the opening and closing of the contacts is not appropriate, it may lead to serious consequences. Thus, it is especially important to quickly and accurately determine whether the GIS knife switch should be switched on when operating the knife switch.

[0027] When observing a GIS knife switch device, observation is generally performed through an observation window on the outside of the enclosed chamber. However, the observation window is usually located high up on the enclosed device, and continuous observation is necessary to determine when the power has run out. Therefore, the operator uses a climbing frame to move to the location of the knife switch observation window and then inserts the camera used for measurement into the observation window to perform the detection work. However, the connection between the camera used for measurement and the knife switch observation window is fixed only by friction from being inserted, and the connection may become unstable during prolonged detection work, and there is also a possibility of it being dropped and colliding. As a result, the camera may be damaged, which may interfere with normal detection work.

[0028] To effectively solve the aforementioned problems, the present invention provides a portable handheld device for rapid detection of GIS equipment status, as shown in Figures 1 to 9, which includes 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 from the end of the detection camera, and the monitoring block 11 is equipped with a camera lens 111 and a supplemental light 112. The detection camera 1 employs a dedicated GIS camera as the detection end, and the detection camera 1 is aligned with the application side, i.e., the position of the GIS knife switch device.

[0029] A camera lens 111 and a supplemental light 112 are positioned at the end of the detection camera 1. A protective cover 113 is fitted to the outside of the monitoring block 11 to protect the internal camera lens 111 and supplemental light 112, and this protective cover 113 is removable during operation. The knife switch observation hole 3 is located on the outside of the closed chamber where the GIS knife switch device is positioned on the application side. The knife switch observation hole 3 is provided with a supplemental light hole 31 and a camera hole 32. The supplemental light hole 31 and the camera hole 32 communicate with the inside of the closed chamber, and a sealing glass is installed at the joining part to ensure airtightness inside the closed chamber while performing the detection work. When the monitoring block 11 is fitted into the knife switch observation hole 3, the camera lens 111 and the supplemental light 112 can be fitted into the supplemental light hole 31 and the camera hole 32 in the knife switch observation hole 3, respectively, and the GIS knife switch device inside the closed chamber is observed and detected through the sealing 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. An LED light is used as the supplemental light 112. When activated, the supplemental light 112 illuminates the inside of the closed chamber through the closed glass, creating a working environment with a suitable level of brightness inside the closed chamber, thereby facilitating the photography operation.

[0031] The other end of the detection camera 1 is equipped with a data jack that allows for wired data transmission by connecting a data cable, enabling more stable transmission of captured video data and charging of the internal battery. Furthermore, the detection camera 1 is fitted with control buttons that adjust the brightness of the supplemental light 112 and enable / stop the detection camera 1, allowing the operator to easily adjust it according to the working environment and improving the adaptability of the detection camera 1 to the working environment.

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

[0033] The fixed limit module 2 assists in securing the detection camera 1 to the knife switch observation hole 3. The fixed limit module 2 includes a limit sleeve 21, which is cylindrical and covers the outside of the detection camera 1. The side walls of the limit sleeve 21 may be made of a material with electromagnetic shielding properties, which can reduce adverse effects on the normal operation of the inside of the detection camera 1 in high-electromagnetic environments and also protect the detection camera 1. In addition, it reduces damage to the detection camera 1 in the event of a collision during installation.

[0034] At the end of the detection camera 1 away from the knife switch observation hole 3, ventilation holes that communicate with the internal and external environments of the limit sleeve 21 are uniformly arranged, which has the effect of cooling the detection camera 1 inside through air exchange. In addition, 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 located here, making it easy for image signals to be wirelessly transmitted through the ventilation holes 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, and its end is stretched to protrude from the end of the monitoring block 11. This ensures that when 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. A fixed magnet 23 is provided on the outer surface of the snap ring 22, and the inner circumference of the snap ring 22 is made of a hard material, which protects the monitoring block 11. The outer surface of the snap ring 22 is made of an elastic material, such as rubber.

[0036] The specific workflow is as follows: When it is necessary to turn on or off the GIS knife switch of a critical energy storage facility located within the power storage facility, the worker uses a climbing frame or ladder to move to the position where the knife switch observation hole 3 is located on the closed chamber. Then, holding the limit sleeve 21 in their hand, the worker fits the monitoring block 11 into the knife switch observation hole 3 by aligning the snap ring 22 protruding from the end of the limit sleeve 21 with the knife switch observation hole 3. The supplemental light 112 and camera lens 111 on the monitoring block 11 are then fitted into the supplemental light hole 31 and camera hole 32, respectively, which facilitates subsequent detection work.

[0037] When fitting the components, the end of the snap ring 22, which is positioned on the outer surface of the monitoring block 11 and fitted onto it, is fitted into the interior of the knife switch observation hole 3 before the monitoring block 11, and comes into contact with the inner wall surface of the knife switch observation hole 3. Subsequently, the snap ring 22 is fitted along the extending direction inside the knife switch observation hole 3, so that it is subjected to a limiting action before the monitoring block 11 is fitted, and is fitted along a stable movement trajectory.

[0038] Similarly, when removing the detection camera 1, the monitoring block 11 will have already detached from the knife switch observation hole 3 along a stable sliding trajectory before the snap ring 22 has fully slid out. In this way, by moving the monitoring block 11 along a stable sliding trajectory, when manually inserting it, insufficient limiting forces can result in lateral shaking inside the knife switch observation hole 3 when the monitoring block 11 is inserted or removed, reducing the likelihood of the inserted monitoring block 11, the supplemental light 112, and the camera lens 111 colliding with the inner wall of the knife switch observation hole 3 due to shaking. Furthermore, according to the above embodiment, the likelihood of the inserted monitoring block 11, the supplemental light 112, and the camera lens 111 colliding with or being damaged by shaking is effectively reduced.

[0039] Furthermore, during insertion and installation, the elastic portion located on the outer circumference of the snap ring 22 and the inner wall surface of the knife switch observation hole 3 come into contact with each other, increasing the relative frictional force and allowing the snap ring 22 to fit more tightly into the inside of the knife switch observation hole 3. In addition, after the snap ring 22 is inserted, the fixed magnet 23 located on the outer surface of the snap ring 22 and the inner wall of the iron knife switch observation hole 3 attract each other, allowing the snap ring 22 to move the monitoring block 11 and the entire detection camera 1 during monitoring, resulting in a more stable coupling with the knife switch observation hole 3. This provides a more stable shooting platform for detecting the opening and closing of the knife switch device and ensures the smooth progress of normal monitoring operations.

[0040] After the detection camera 1 is installed, the supplemental light 112 is activated, and the light illuminates the inside of the closed chamber through the corresponding closed glass. Then, the camera lens 111 captures the state inside the closed chamber through the closed glass of the camera hole 32. In the process of starting the knife switch, the iron rod-shaped movable contact extends and makes contact with the corresponding fixed contact, and the switch is turned on and power is supplied. During this process, the detection camera 1 captures an image of the switch-on process and transmits it to the GIS detection tablet, allowing the operator to easily observe it, and the image analysis module mounted on the GIS detection tablet can analyze the image.

[0041] Specifically, the GIS knife switch status intelligent identification app (APP) included in the image analysis module, when activated, uses an AI algorithm to automatically identify and display the open / closed state of the GIS knife switch. The system now automatically identifies the open / closed state of the GIS knife switch without requiring the user to visually check it, improving identification accuracy and increasing user work efficiency by more than 80%.

[0042] To detect in real time whether the knife switch should be switched on, deep learning and semantic segmentation techniques can be used in combination with a multi-stage exposure algorithm. Here, the semantic segmentation algorithm is quantified by an NCNN. Then, through extensive pruning and model compression techniques, the deep learning segmentation algorithm is deployed to a GIS detection tablet.

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

[0044] This application also supports a function that activates an AI identification function when previewing video in real time to detect in real time whether there is damage to the knife switch. After the knife switch is in an appropriate position, the edge features of the knife switch are extracted using deep learning feature extraction technology. After edge extraction by deep learning, the distribution of all line segments is statistically analyzed using a differential gradient statistical algorithm. The purpose of detection is achieved by determining whether there is damage to the edge portion. The minimum detected damage area is 5% of the knife switch's field of view area, and the detection time is 2 seconds per detection. If damage is detected, an alarm is immediately issued, notifying the observer to be careful and stay away, and also notifying maintenance personnel to shut off the power to the equipment and perform inspection and maintenance.

[0045] Furthermore, by activating the AI ​​identification function when previewing the video in real time, it is possible to detect in real time whether a foreign object is jammed in the slot, preventing damage to the knife switch if the foreign object is obstructing it before the switch is turned on. The HSV color extraction algorithm is used for this detection item, and color is extracted from the background. As a template image, the HSV algorithm is used again during detection to extract color from the detected image in real time, and finally the difference is taken with the template image to obtain a difference energy map, and finally the abnormal region is extracted using self-adaptive binarization technology. The minimum foreign object detection diameter of this algorithm is 20% of the knife switch length, and the detection time is 1 second / detection.

[0046] This algorithm allows for the identification of the high-gloss surface of the protruding portion of the iron rod-shaped movable contact and the plastic color of the protective protruding surface. During the switch-on process, the algorithm can determine the length the iron rod-shaped movable contact extends and the position where it penetrates the fixed contact by observing the positional changes of the aforementioned colored portions, thereby accurately determining whether switching on is appropriate.

[0047] This application enables stable imaging of the operation process of a GIS knife switch device inside a closed chamber, allowing for rapid and accurate determination of the entire dynamic change in the knife switch position. The confirmation time for the GIS knife switch position can be reduced to within 15 seconds, thus facilitating isolation operations and avoiding the problems of inaccurate opening and closing instructions for the GIS device's knife switch and the time required to confirm the open / closed position of the knife switch.

[0048] (Example 2) Based on Embodiment 1, as shown in Figures 1-8 of the specification, a sliding groove 211 is provided inside the side wall of the limit sleeve 21 in the portion adjacent to the snap ring 22. A pressure ring 24 is installed in the ring-shaped opening of the limit cavity 241 adjacent to the snap ring 22. The vertical cross-section of the pressure ring 24 is L-shaped, one end of the pressure ring 24 is fitted into the sliding groove 211 and is slidably connected to the sliding groove 211 by a reset spring, and the other end of the pressure ring 24 contacts the outer circumferential surface of the snap ring 22. The area enclosed between the pressure ring 24 and the snap ring 22 forms the limit cavity 241, and the inside of the outer circumferential part of the snap ring 22 is made hollow to form a fixed cavity 221, and the limit cavity 241 and the fixed cavity 221 communicate with each other internally.

[0049] The specific workflow is as follows. Based on the specific workflow of Example 1, the diameter of the outer surface of the snap ring 22 can be set smaller than the inner diameter of the knife switch observation hole 3 in order to ensure that the detection camera 1 can be easily attached and detached during the work. 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 surface of the snap ring 22 and the inner wall of the knife switch observation hole 3.

[0050] Next, the operator pushes the limit sleeve 21, allowing it to be further fitted into the knife switch observation hole 3. At this time, the limit sleeve 21 comes into contact with the pressure ring 24 on the end surface of the knife switch observation hole 3 and slides under pressure. The end of the pressure ring 24 fitted into the sliding groove 211 further presses against the reset spring, fitting it into the sliding groove 211. This reduces the internal space of the limit cavity 241. Air inside the limit cavity 241 flows into the fixed cavity 221 on the outer circumference of the snap ring 22, and the fixed cavity 221 expands due to the increase in internal air pressure. The outer circumference of the snap ring 22 corresponding to the fixed cavity 221 expands and comes into close contact with the inner wall surface of the knife switch observation hole 3, increasing the relative frictional force between the snap ring 22 and the inner wall of the knife switch observation hole 3, further stabilizing the mounting of the limit sleeve 21.

[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 and enabling its expansion. After the snap ring 22 and the knife switch observation hole 3 are clamped together, the control valve activates to block the communication portion, ensuring the degree of expansion of the fixed cavity 221, further stabilizing the fitting of the limit sleeve 21, and allowing the detection camera 1 to maintain relative stability with respect to the knife switch observation hole 3 during monitoring, thus enabling smooth monitoring of the knife switch device.

[0052] Furthermore, if removal is necessary, simply controlling the opening of the control valve from the outside causes the airflow in the fixed cavity 221 to flow back into the limit cavity 241, reducing the relative friction 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 increases, pushing the pressure ring 24 and moving it away from the knife switch observation hole 3, thereby driving the monitoring block 11 to slide away from the knife switch observation hole 3. This makes it easier to remove the detection camera 1 and prevents it from being damaged by being roughly pulled out manually. This further automates and makes the installation and removal of the detection camera 1 from the knife switch observation hole 3 more convenient, reducing situations where installation and removal become problematic due to human error.

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

[0054] The specific workflow is as follows. Based on the specific workflow of Example 2, a limit airbag 25 is provided inside the limit cavity 241 to further ensure that the airflow inside the limit cavity 241 flows smoothly into the fixed cavity 221. When the pressing ring 24 slides, it contacts and presses against the limit airbag 25, and the limit airbag 25 receives pressure, causing airflow to flow into the fixed cavity 221 via the connecting tube 251 connected to the fixed cavity 221. This controls the internal expansion of the fixed cavity 221, thereby fixing the snap ring 22. In this way, the highly airtight limit airbag 25 prevents the airflow inside the limit cavity 241 from being compressed and flowing out through the connection gap of the pressing ring 24, thus preventing it from affecting the control of air pressure.

[0055] Furthermore, when removing the device, closing the control valve via an external control device causes the airflow in the fixed cavity 221 to reverse and flow through the connecting tube 251 into the limit airbag 25 inside the limit cavity 241. This causes the limit airbag 25 to inflate and press against the pressure ring 24, which in turn pushes the end surface of the knife switch observation hole 3. The reverse action causes the end of the detection camera 1 to slide out, facilitating the separation of the detection camera 1 from the knife switch observation hole 3. Additionally, due to the high airtightness of the limit airbag 25, it is possible to fill the limit airbag 25 with liquid. Because the liquid has low compressibility, after passing it through the fixed cavity 221, it causes the fixed cavity 221 to inflate even more significantly, resulting in a tighter fit between the snap ring 22 and the knife switch observation hole 3. This further stabilizes the connection between the detection camera 1 and the knife switch observation hole 3 during monitoring, making the monitoring operation smoother.

[0056] Furthermore, limit blocks 222 are uniformly provided on the outer surface of the snap ring 22 in the portion corresponding to the fixed cavity 221, and their ends are set to be inclined. As a result, after the fixed cavity 221 expands, the end of the limit block 222 comes into contact with the inner wall portion of the knife switch observation hole 3 due to the expansion, and tightly connects with the inner wall portion, further ensuring the stability of the detection camera 1 during installation and enabling smooth monitoring operations.

[0057] (Example 4) Based on Example 3, as shown in Figures 6-7 of the specification, the pressing ring 24 is provided with a vent hole 242 in the 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. A seal ring 243 is installed on the outer surface of the vent hole 242, and the seal ring 243 is made of an elastic material.

[0058] The specific workflow is as follows. Based on the specific workflow of Example 3, after the detection camera 1 is attached to the knife switch observation hole 3, the portion of the pressing ring 24 in which the vent hole 242 is installed comes into 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 is subjected to pressure and its volume decreases, reducing the volume of the internal space of the pressing ring 24. When the pressing is completed, the end of the pressing ring 24 located in the sliding groove 211 tends to be reset by the action of the connected reset spring. When the pressing ring 24 is reset, the internal space increases, but the air pressure decreases, so it is necessary to replenish the airflow from the outside through the vent hole 242.

[0059] The seal ring 243 provided on the outer surface of the vent hole 242 improves the airtightness of the vent hole 242, making it difficult for external airflow to enter. As a result, the negative pressure action of the limit cavity 241 inside the pressure ring 24 causes the end surfaces of the knife switch observation hole 3 that are in contact with the vent hole 242 to be drawn together and tightly fixed, further ensuring a stable connection between the limit sleeve 21 and the knife switch observation hole 3. If removal is necessary, simply returning the airflow inside the limit airbag 25 causes the inflated limit airbag 25 to push the air inside the limit cavity 241 out of the vent hole 242, releasing the negative pressure action and separating the end of the knife switch observation hole 3 that is in contact with the pressure ring 24, making it easy to remove the detection camera 1. This reduces the risk of damage to the detection camera 1 due to manual operation.

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

[0061] The specific workflow is as follows. Based on the specific workflow of Example 4, when the monitoring block 11 is first fitted into the knife switch observation hole 3 and is not yet stable, the magnetic attraction between the fixed magnet 23 located on the snap ring 22 on the outer circumference of the monitoring block 11 and the inner wall of the knife switch observation hole 3 causes the fixed magnet 23 to move toward the inner wall of the knife switch observation hole 3, causing the monitoring block 11 to sway from side to side and collide with the inner wall of the knife switch observation hole 3, making the various parts of the monitoring block 11 susceptible to damage. Therefore, in the initial setup, the fixed magnet 23 is installed on the upper surface of the snap ring 22 and located inside the fixed cavity 221, receiving the shielding effect of the pressing ring 24. The pressing ring 24 is made of 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 snap ring 22 are stably fitted into the knife switch observation hole 3, the pressing ring 24 slides, exposing the fixing magnet 23 positioned on the outer surface of the snap ring 22, which then exerts a limit fixing function by magnetic attraction. At this time, under the action of the snap ring 22 and the fixing cavity 221, the monitoring block 11 maintains a stable distance from the knife switch observation hole 3, and the protrusion of the fixing cavity 221 maintains a gap between the exposed fixing magnet 23 and the corresponding inner wall of the knife switch observation hole 3, thereby exerting a fixing function by magnetic attraction and preventing damage due to collision between the monitoring block 11 and the inner wall of the knife switch observation hole 3. Furthermore, during the removal process, the gap prevents direct contact between the fixing magnet 23 and the inner wall of the knife switch observation hole 3, reducing the frictional resistance experienced when the snap ring 22 slides out, thereby making the installation and removal of the detection camera 1 even smoother.

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

[0064] The specific workflow is as follows. Based on the specific workflow of Example 5, in the initial state, the end of the fixed jaw 26 is close to the end of the pressing ring 24, and as the pressing ring 24 is compressed under pressure during the installation process, 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 relative to the closed chamber, the similarly protruding fixed jaw 26 is fitted into the outer peripheral surface of the end of the knife switch observation hole 3, and a magnet weaker in magnetism than the fixed magnet 23 can be provided at the end of the fixed jaw 26, so that the end of the fixed jaw 26 is close to and in close contact with the outer peripheral surface of the knife switch observation hole 3. In addition, the anti-slip block 261 also comes into close contact with the outer peripheral surface, so that the fixed jaw 26 is driven to embrace the detection camera 1 and the protruding end of the knife switch observation hole 3, further ensuring the limit fixing effect received by the detection camera 1.

[0065] (Example 7) Based on Example 6, as shown in Figures 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, and a cleaning block 271 is provided at the end of the cleaning rod 27, with the cleaning block 271 being disc-shaped. 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, which is made of synthetic fiber or cotton cloth.

[0066] The specific workflow is as follows. Based on the specific workflow of Example 3, in an electromagnetic environment, external dust may adhere to the closed glass inside the camera hole 32 due to electrostatic action. Therefore, before starting the monitoring operation, first lift the limit sleeve 21 and insert the cleaning rod 27 into the knife switch observation hole 3, so that the surface of the cleaning sleeve 272 comes into contact with the cleaning solution. The cleaning solution can be selected from an electrical switch device cleaning agent to avoid adverse effects on the device. By rotating the cleaning rod 27, the cleaning sleeve wipes the surface of the closed glass. By cleaning away any dust that may adhere, the closed glass is kept clean, the image captured by the detection camera 1 becomes clearer, and the judgment results become more accurate.

[0067] The basic principles, main features, and advantages of the present invention have been disclosed and explained above. Those skilled in the art should understand that the present invention is not limited to the embodiments described above. The embodiments and specification described above are merely illustrative of the principles of the present invention, and the present invention can be further modified and improved in various ways, without departing from the spirit and scope of the invention, and all such modifications and improvements fall within the scope of protection of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents. [Explanation of Symbols]

[0068] 1 Detection camera, 11 Monitoring block, 111 Camera lens, 112 Supplementary light, 113 Protective cover, 2 Fixed limit module, 211 Sliding groove, 21 Limit sleeve, 22 Snap ring, 221 Fixed cavity, 222 Limit block, 23 Fixed magnet, 24 Pressure ring, 241 Limit cavity, 242 Vent hole, 243 Seal ring, 25 Limit airbag, 251 Connecting tube, 26 Fixed jaw, 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, It includes 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 from the end of the detection camera (1), and a camera lens (111) and a supplemental light (112) are provided on the monitoring block (11). The monitoring block (11) is fitted into the knife switch observation hole (3), and the camera lens (111) and the supplemental light (112) are fitted into the supplemental light hole (31) and camera hole (32) in the knife switch observation hole (3), respectively. A protective cover (113) is fitted onto the outside of the monitoring block (11). The data transmission module transmits image information captured by the detection camera (1) to the GIS detection tablet, and the image analysis module, mounted on the GIS detection tablet, analyzes the image information to determine 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), and the fixed limit module (2) includes a limit sleeve (21), the limit sleeve (21) is cylindrical and covers the outside (1) of the detection camera. 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 the outer peripheral surface portion of the snap ring (22) is formed of an elastic material. A sliding groove (211) is provided inside the side wall of the limit sleeve (21) in the portion close to the snap ring (22), and a pressing ring (24) is installed in the ring-shaped opening of the limit sleeve (21) 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), and the other end is in contact with the outer circumferential surface of the snap ring (22). A limit cavity (241) is formed in the region enclosed between the pressing ring (24) and the snap ring (22), and a fixed cavity (221) is formed inside the outer circumference of the snap ring (22) by making it hollow, and the limit cavity (241) and the fixed cavity (221) are in communication with each other internally. A portable handheld device for rapid detection of GIS equipment status, characterized by the following features.

2. A GIS instrument status rapid detection portable handheld device according to claim 1, characterized in that a limit airbag (25) is provided inside the limit cavity (241), the limit airbag (25) is ring-shaped and communicates with the inside of the fixed cavity (221) via a connecting tube (251), and a control valve is provided in the middle of the connecting tube (251).

3. The GIS instrument status rapid detection portable handheld device according to claim 2, characterized in that 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 away from the camera hole (32).

4. The GIS instrument status rapid detection portable handheld device according to claim 3, characterized in that the pressing ring (24) is provided with a vent hole (242) in 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).

5. The portable handheld device for rapid detection of GIS instrument status according to claim 4, characterized in that a seal ring (243) is provided on the outer surface of the air vent hole (242), and the seal ring (243) is made of an elastic material.

6. The GIS instrument status rapid detection portable handheld device according to claim 1, characterized in that the fixed magnet (23) is provided on the outer surface of the snap ring (22), is located in the internal region of the limit cavity (241), and is distributed in a ring shape around the central axis of the limit sleeve (21).

7. The GIS instrument status rapid detection portable handheld device according to claim 6, characterized in that a fixed jaw (26) is installed at the end of the limit sleeve (21) in a portion located outside the pressing ring (24), and the fixed jaw (26) is made of an elastic material.

8. The portable handheld device for rapid detection of GIS equipment status according to claim 7, characterized in that anti-slip blocks (261) are uniformly provided on the inner surface of the fixed jaw (26), and the anti-slip blocks (261) have sharp edges and are made of rubber material.

9. A portable handheld device for rapid detection of GIS equipment status according to claim 8, characterized in that 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 a cleaning sleeve (272) is covered on its outer surface.

Images