A gas cabinet in-cabinet video monitoring system

Abstract

The utility model discloses a kind of gas cabinet in-cabinet video monitoring systems, it is related to gas cabinet technical field, can solve the technical problem of gas cabinet in-cabinet monitoring difficulty.Video monitoring system includes video acquisition device being set in the piston top and control terminal being set in gas cabinet outside;Video acquisition device includes first imager being encapsulated in the first protective shell inside and second imager being encapsulated in the second protective shell inside, first imager is visible light imager, and second imager is non-visible light imager, first imager and second imager are electrically connected with control terminal, first protective shell is connected with fixed bin by first rotating mechanism, second protective shell is connected with fixed bin by second rotating mechanism, the bottom of fixed bin is connected with mounting bracket by third rotating mechanism, and mounting bracket is connected with the upper surface of piston.The utility model is applied to gas cabinet monitoring, has the advantage of eliminating artificial monitoring safety risk, real-time capture piston anomaly.

Description

Technical Field

[0001] This utility model relates to the field of gas holder technology, and in particular to a video monitoring system for gas holders. Background Technology

[0002] As a core piece of equipment in the industrial sector for storing fuel gases (such as natural gas and coke oven gas), the stable operation of the internal piston directly determines the safety performance and service life of the gas holder. During long-term operation, the piston must rise and fall smoothly in response to changes in the gas pressure inside the holder, while avoiding abnormalities such as localized deformation or horizontal displacement. Failure to monitor these abnormalities in a timely manner can easily lead to safety accidents such as gas leaks, holder corrosion, or even explosions. Therefore, real-time and accurate monitoring of the piston's operating status is crucial.

[0003] In existing technologies, the assessment of piston operation status mostly relies on manual measurement. Workers periodically enter the gas holder and use tools such as tape measures and levels to measure the piston's position, levelness, and sealing clearance. This method not only exposes workers to safety risks due to the complex environment inside the holder, but also involves long measurement cycles and cannot capture dynamic anomalies in piston operation in real time.

[0004] To address the shortcomings of manual measurement methods, video monitoring-based solutions have been implemented in many industrial sectors to replace manual labor. For example, Chinese patent document CN101119481A discloses a remote alarm video monitoring system and method. The system includes: at least one image acquisition device installed at the monitoring location for real-time image acquisition, connected to an image acquisition card; the image acquisition card is connected to an image information processor to transmit the acquired image data; the image information processor is a processor with image data processing capabilities, serving as the system's control center, and is connected to a wireless transmitter. When an abnormal situation occurs at the monitoring location, an alarm signal is transmitted via the wireless transmitter to at least one receiving terminal through the wireless communication network. This solution achieves automatic alarm functionality through moving target detection technology, sending the alarm signal to relevant personnel via a wireless network and automatically activating video recording to provide video material for subsequent investigations. The automatic alarm function of this solution frees monitoring personnel from heavy and tedious work, and the automatic recording and storage function after a suspicious situation is detected greatly saves storage resources.

[0005] For example, Chinese patent document CN116939170A discloses a video surveillance method, a video surveillance server, and an encoder device. This method includes the following steps: receiving a video source signal and preprocessing it; performing video encoding and compression; transmitting the compressed video data to a remote video surveillance server and performing real-time decoding; performing video data analysis on the server side; and issuing different early warnings based on the analysis results. A video surveillance server includes a video acquisition module, a video encoding module, a storage management module, a video analysis module, a video transmission module, and a monitoring center module. This solution uses video analysis technology to automatically detect the impact of the surrounding environment on the clarity of video surveillance and issues different early warnings based on predefined rules.

[0006] For example, Chinese patent document CN210839849U discloses a multifunctional infrared thermal imaging online monitoring device, including an infrared thermal imaging unit, an image processing unit, a video monitoring module, a data transmission module, a UPS power supply module, an image output module, a storage module, and an alarm module. The output terminal of the infrared thermal imaging unit is connected to the first data input terminal of the image processing unit; the data output terminal of the video monitoring module is connected to the second data input terminal of the image processing unit; the first input / output terminal of the data transmission module is connected to the data input / output terminal of the image processing unit; the input terminal of the image output module is connected to the data output terminal of the image processing unit; and the input / output terminal of the image processing unit is connected to the input / output terminal of the microprocessor. This solution has multiple functions such as infrared imaging, temperature monitoring, video monitoring, and alarm, reducing the failure rate of power system equipment, alleviating personnel maintenance costs, and lowering maintenance and management costs.

[0007] Based on existing image processing technology, deploying video acquisition equipment inside the gas holder can reduce personnel safety risks and improve real-time monitoring. However, current video monitoring solutions suffer from significant structural design flaws that make them unsuitable for gas holder monitoring: existing video acquisition equipment is mostly installed in fixed positions, typically in locations that do not obstruct equipment operation. While fixing the video acquisition device to a high position on the gas holder wall can avoid interfering with piston movement, it makes it difficult to accurately observe the proximal piston movement. Utility Model Content

[0008] To address one or more technical problems in the prior art, this utility model provides a video monitoring system for the interior of a gas holder, wherein a piston is installed inside the gas holder. The video monitoring system includes a video acquisition device installed above the piston and a control terminal installed outside the gas holder. The video acquisition device includes a first imager encapsulated inside a first protective shell and a second imager encapsulated inside a second protective shell. The first imager is a visible light imager, and the second imager is a non-visible light imager. Both the first and second imagers are electrically connected to the control terminal. The first protective shell is connected to the fixed chamber via a first rotating mechanism, and the second protective shell is connected to the fixed chamber via a second rotating mechanism. The bottom of the fixed chamber is connected to the mounting bracket via a third rotating mechanism, and the mounting bracket is connected to the upper surface of the piston.

[0009] Optionally, the bottom of the third rotating mechanism is connected to a first connecting flange, and the top of the mounting bracket is connected to a second connecting flange, wherein the first connecting flange and the second connecting flange are connected by bolts.

[0010] Optionally, the second connecting flange is connected to the top of the telescopic rod, the telescopic rod is inserted into the support cylinder, the telescopic rod is provided with a plurality of first connecting holes, and the support cylinder is provided with second connecting holes corresponding to the first connecting holes. The first connecting holes and the second connecting holes are connected by bolts to realize the telescopic adjustment of the telescopic rod. The bottom of the support cylinder is connected to three support rods, which are distributed at 120° intervals. The end of each support rod is connected to a magnetic foot by an adjusting bolt. The magnetic foot is magnetically attached to the upper surface of the piston.

[0011] Optionally, the support cylinder is provided with a first fixing ring, and the support rod is provided with a second fixing ring, the first fixing ring and the second fixing ring being connected by a connecting rod.

[0012] Optionally, the bottom of the adjusting bolt is provided with a spherical protrusion, and the magnetic foot is provided with a spherical groove that matches the spherical protrusion. The spherical protrusion is embedded in the spherical groove to realize multi-angle adjustment of the adjusting bolt relative to the magnetic foot.

[0013] Optionally, the first protective shell and the second protective shell are symmetrically arranged on both sides of the fixed chamber.

[0014] Optionally, a first protective cover is connected to the top of the first protective shell, and a second protective cover is connected to the top of the second protective shell.

[0015] Optionally, the upper surface of the piston is pre-set with N monitoring points, where N is an integer greater than or equal to 1. Each monitoring point is provided with a mounting bracket, and each mounting bracket is connected to a video acquisition device.

[0016] Optionally, the monitoring points include central monitoring points and edge monitoring points. The central monitoring points are located in the central region of the upper surface of the piston, and the edge monitoring points are evenly distributed in the edge region of the upper surface of the piston. The number of edge monitoring points is not less than three.

[0017] Optionally, the outer periphery of the third rotating mechanism is provided with a marking ring for imaging marking.

[0018] The beneficial effects of this utility model are: This invention utilizes a video acquisition device positioned above the piston and a control terminal located outside the gas holder. The video acquisition device rises and falls synchronously with the piston, allowing personnel to obtain data from inside the gas holder via the external control terminal without entering the gas holder. This fundamentally avoids the risk of personnel being exposed to a hazardous environment and significantly improves the safety of monitoring operations. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of a video monitoring system according to an embodiment of the present utility model; Figure 2 This is a schematic diagram showing the connection between the video acquisition device and the installation device according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of a video acquisition device according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the installation device according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the connection between the second connecting flange and the telescopic rod according to an embodiment of the present utility model; Figure 6 This is a schematic diagram showing the connection between the mounting device and the piston according to an embodiment of the present utility model; Figure 7 yes Figure 6 Enlarged view of point A in the middle; Figure 8 This is a layout diagram of the video acquisition device according to an embodiment of the present utility model.

[0021] In the picture: 1. Gas holder; 2. Piston; 3. Video acquisition device; 31. First protective shell; 311. First imager; 32. Second protective shell; 321. Second imager; 33. First rotating mechanism; 34. Fixed chamber; 35. Second rotating mechanism; 36. Third rotating mechanism; 37. First connecting flange; 38. First protective cover; 39. Second protective cover; 4. Control terminal; 5. Mounting bracket; 51. Second connecting flange; 52. Telescopic rod; 521. First connecting hole; 53. Support cylinder; 531. Second connecting hole; 532. First fixing ring; 54. Support rod; 541. Second fixing ring; 55. Adjusting bolt; 551. Spherical protrusion; 56. Magnetic foot; 561. Spherical groove; 57. Connecting rod. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0023] It should be noted that, in order to clearly show the structural relationship of the internal key components of this utility model, some pipelines, lines, support brackets and other components of the actual product are omitted in the drawings. However, the specific design schemes of these omitted components are all easily implemented by those skilled in the art based on the technical solutions currently provided by this utility model and conventional design.

[0024] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0025] Example 1: like Figures 1-8As shown, a video monitoring system for a gas holder 1 is provided, wherein a piston 2 is installed inside the gas holder 1. The video monitoring system includes a video acquisition device 3 installed above the piston 2 and a control terminal 4 installed outside the gas holder 1; The video acquisition device 3 includes a first imager 311 encapsulated inside a first protective shell 31 and a second imager 321 encapsulated inside a second protective shell 32. The first imager 311 is a visible light imager, and the second imager 321 is a non-visible light imager. Both the first imager 311 and the second imager 321 are electrically connected to the control terminal 4. The first protective shell 31 is connected to the fixed chamber 34 through a first rotating mechanism 33, and the second protective shell 32 is connected to the fixed chamber 34 through a second rotating mechanism 35. The bottom of the fixed chamber 34 is connected to the mounting bracket 5 through a third rotating mechanism 36, and the mounting bracket 5 is connected to the upper surface of the piston 2.

[0026] In practical implementation, existing technologies suffer from high safety risks and monitoring lag in manual measurement. This invention addresses these issues by setting up a video acquisition device 3 and a control terminal 4. The video acquisition device 3 rises and falls synchronously with the piston 2, collecting real-time information from inside the gas holder 1 and transmitting it to the control terminal 4 outside the gas holder 1. This allows personnel to obtain data without entering the gas holder 1, eliminating safety risks. The real-time acquisition and data transmission characteristics of the video acquisition device 3 can capture instantaneous anomalies.

[0027] The electrical connection between the first imager 311, the second imager 321, and the control terminal 4 can be wireless or wired. The wireless connection can utilize an industrial-grade wireless transmission module (such as LoRa or 4G / 5G modules). This module can be integrated into the fixed compartment 34 of the video acquisition device 3, transmitting data wirelessly to the wireless receiving module of the control terminal 4. This is suitable for scenarios where wiring within the gas holder 1 is difficult or where the piston 2 experiences significant lifting and lowering. The wired connection can be achieved using a corrosion-resistant shielded communication cable. One end of the cable connects to the signal interfaces of the first imager 311 and the second imager 321, while the other end passes through a pre-set sealed cable hole in the gas holder 1 wall and connects to the wired interface of the control terminal 4. Simultaneously, the communication cable can be extended and retracted via a cable release pulley installed within the gas holder 1 as the piston 2 rises and falls, ensuring connection stability.

[0028] The control terminal 4 can be an industrial control device that integrates data receiving, processing, display and control functions. Specifically, it can be an industrial personal computer (IPC) or an embedded industrial control computer in the existing technology, configured with data processing software and a display screen, which can realize functions such as data storage, image analysis, and parameter early warning. At the same time, it has multi-port expansion capability and can be used to access data from multiple video acquisition devices 3.

[0029] Both the first rotating mechanism 33 and the second rotating mechanism 35 can adopt a servo motor-driven shaft structure. The servo motor is fixed to the side wall of the fixed chamber 34, and the motor output shaft is connected to the connecting shaft of the first protective shell 31 / second protective shell 32. The forward and reverse rotation of the servo motor drives the first protective shell 31 / second protective shell 32 to rotate, thereby realizing the vertical angle adjustment of the first imager 311 / second imager 321. For the vertical angle adjustment, an adjustment range of at least 90° is sufficient to ensure that the imager covers the key areas inside the gas holder 1. At the same time, a rolling bearing can be installed at the connection between the rotating shaft and the fixed chamber 34 to reduce rotational friction and ensure adjustment accuracy. More specifically, the connecting shaft can adopt a hollow design with a built-in cable channel to ensure that the cable is not damaged during rotation.

[0030] The third rotating mechanism 36 can be an electric pan-tilt head. The base of the electric pan-tilt head is connected to the first connecting flange 37, and the rotating platform of the electric pan-tilt head is connected to the bottom of the fixed chamber 34. The electric pan-tilt head has a built-in drive motor, which can realize the 360° angle adjustment of the rotating platform in the horizontal direction. The electric pan-tilt head can precisely control the rotation angle of the fixed chamber 34 through signal linkage with the control terminal 4, thereby driving the first imager 311 and the second imager 321 to achieve multi-directional scanning.

[0031] The first imager 311 (visible light imager) can acquire visible light images of the upper surface of piston 2 in real time, identify the physical state of the piston 2 surface, including whether there is structural damage such as deformation, corrosion, or cracks on the piston 2 surface, whether the sealing gap between piston 2 and the inner wall of gas holder 1 is uniform, and can also capture the dynamic displacement of piston 2 during the lifting and lowering process to determine whether piston 2 has abnormal movement such as tilting or jamming.

[0032] The second imager 321 (non-visible light imager) is not limited to a single imager; it can be a combination of multiple imagers. For example, it can combine an infrared thermal imager and a gas imager. The infrared thermal imager can acquire real-time temperature distribution images within the gas tank 1, identify localized high-temperature areas within the tank (such as frictional heating of sealing components or localized temperature rise caused by gas leaks), and convert the thermal imaging data into specific temperature values ​​using a temperature algorithm. The gas imager can capture the characteristic spectra of toxic and harmful gases (such as methane and carbon monoxide), forming a gas distribution image, and simultaneously calculate the gas concentration value using a spectral analysis algorithm. Toxic and harmful gas molecules have characteristic absorption or emission spectra in specific wavelength bands (such as methane in the 3.3μm band). The non-visible light imager can capture changes in light signals in this wavelength band using a dedicated optical filter and spectral sensor, converting the invisible gas distribution into a visible image. Simultaneously, by combining the calibration relationship between spectral intensity and gas concentration, the built-in algorithm calculates the gas concentration, achieving visualized monitoring of gas leaks.

[0033] The first imager 311 and the second imager 321 of the video acquisition device 3 can convert the acquired image signals (analog signals or digital signals) into electrical signals and transmit them to the control terminal 4 via wireless or wired connection. The data receiving module of the control terminal 4 decodes the electrical signals into image data and then processes multiple frames of images through a dedicated image processing algorithm (such as image stitching and distortion correction algorithm) to eliminate imaging distortion. At the same time, it can also stitch the local images acquired by each device into a complete image of the upper surface of the piston 2 and the inside of the gas holder 1 according to the installation position coordinates of multiple video acquisition devices 3, and fit it into a visual piston monitoring image, which is displayed in real time on the display screen of the control terminal 4.

[0034] The second imager 321 converts the collected gas concentration and temperature data into digital signals and transmits them to the control terminal 4 via a data bus. The data analysis module of the control terminal 4 can compare the data with preset safety thresholds (such as the lower explosive limit concentration of gas and the normal operating temperature range). If the data exceeds the threshold, an audible and visual warning is immediately triggered, and the location and specific parameters of the abnormal area are marked on the visualized image. At the same time, the control terminal 4 can also store all data in the database according to the timestamp to form a historical data chain, and the development trend of hidden dangers can be analyzed through the data backtracking function.

[0035] The control terminal 4 can integrate face recognition and target detection algorithms based on existing image processing software. When a worker enters the gas cabinet 1 (such as during maintenance), the visible light image collected by the first imager 311 is transmitted to the control terminal 4. The target detection algorithm can first identify the human body outline in the image and count the number of people in the area. The face recognition algorithm extracts facial feature information and compares it with the preset staff face database to confirm the identity of the personnel and prevent unauthorized personnel from entering.

[0036] The image processing software of the control terminal 4 can also integrate a smoke and fire recognition algorithm. It can make a joint judgment by using the visible light image of the first imager 311 and the infrared thermal image of the second imager 321. The visible light image identifies the color (such as orange-red) and shape (such as the outline of a jumping flame) features of the flame, and the infrared thermal image identifies high-temperature points. When the features of the two match, it is determined that the smoke and fire is abnormal and an early warning is triggered immediately.

[0037] The control terminal 4 can also be connected to other monitoring systems (such as pressure sensors and liquid level sensors) of the gas holder 1 via a data interface. When other systems detect alarm information such as sudden pressure changes or abnormal gas liquid levels in the gas holder 1, they will transmit alarm signals to the control terminal 4. The control terminal 4 will automatically send control commands to the video acquisition device 3 of the area corresponding to the alarm information (such as the specific quadrant of the gas holder 1 corresponding to the sudden pressure change), adjust the angle and focus of the video acquisition device 3, focus on the alarm area to collect video, and transmit detailed images and data of the alarm area to the control terminal 4. Based on the real-time data, the staff can judge the type and severity of the hidden danger and take intervention measures in advance to achieve early warning, thereby ensuring the safe operation of the gas holder 1.

[0038] Based on the above design, this utility model can not only reduce labor costs, but also has the feature of visual measurement, thereby ensuring the safe operation of the gas holder.

[0039] Example 2: Furthermore, the bottom of the third rotating mechanism 36 is connected to the first connecting flange 37, and the top of the mounting bracket 5 is connected to the second connecting flange 51. The first connecting flange 37 and the second connecting flange 51 are connected by bolts.

[0040] In specific implementation, the bottom of the third rotating mechanism 36 can be connected to the upper surface of the first connecting flange 37 by welding, and the top of the mounting bracket 5 can also be fixed to the lower surface of the second connecting flange 51 by welding; the flanges of the first connecting flange 37 and the second connecting flange 51 have the same flange size, and both have the same number (e.g., 4 to 8) of bolt holes evenly distributed around the circumference. Stainless steel bolts are inserted into the bolt holes and tightened with nuts to achieve a detachable connection between the two.

[0041] The flange connection uses multiple circumferentially distributed bolts to achieve uniform stress distribution. Compared to a single bolt or welded connection, this disperses the load between the third rotating mechanism 36 and the mounting bracket 5, preventing loosening caused by localized stress concentration. Especially during the piston 2's lifting and lowering process, it resists vibration and impact, ensuring the installation stability of the video acquisition device 3. When the video acquisition device 3 needs maintenance or replacement, only the bolts need to be removed to separate the third rotating mechanism 36 from the mounting bracket 5, without damaging the original connection structure. This facilitates later maintenance and component replacement, reducing operating costs. The first connecting flange 37 and the second connecting flange 51, when fitted together, form a horizontal installation reference surface, ensuring the installation plane of the third rotating mechanism 36 is level. This, in turn, ensures the initial installation angle of the video acquisition device 3 is controllable, avoiding imaging deviations caused by installation tilt.

[0042] Example 3: Furthermore, the second connecting flange 51 is connected to the top of the telescopic rod 52, the telescopic rod 52 is inserted into the support cylinder 53, the telescopic rod 52 is provided with a plurality of first connecting holes 521, and the support cylinder 53 is provided with second connecting holes 531 corresponding to the first connecting holes 521. The first connecting holes 521 and the second connecting holes 531 are connected by bolts to realize the telescopic adjustment of the telescopic rod 52. The bottom of the support cylinder 53 is connected to three support rods 54, which are distributed at 120° intervals. The end of each support rod 54 is connected to a magnetic foot 56 by an adjusting bolt 55. The magnetic foot 56 is magnetically attached to the upper surface of the piston 2.

[0043] In practical implementation, the piston 2 of the gas holder 1 in the prior art is usually made of steel, which has obvious ferromagnetism and can be attracted by magnetic materials, providing a basic condition for fixing the magnetic feet 56. The magnetic feet 56 can be made of strong magnetic materials (such as neodymium iron boron permanent magnets). Its bottom is a flat structure. When it is in contact with the upper surface of the piston 2, the magnetic force generated by the strong magnet can make the magnetic feet 56 tightly attracted to the upper surface of the piston 2, which can resist the vibration and inertial force during the lifting and lowering process of the piston 2, and ensure that the mounting bracket 5 is stably fixed on the upper surface of the piston 2.

[0044] The outer diameter of the telescopic rod 52 matches the inner diameter of the support cylinder 53, allowing the telescopic rod 52 to slide up and down along the axis of the support cylinder 53. The first connecting hole 521 on the telescopic rod 52 can be a threaded hole. When adjusting the extension length of the telescopic rod 52, first remove the bolts passing through the first connecting hole 521 and the second connecting hole 531, push the telescopic rod 52 to the target height, aligning the corresponding first connecting hole 521 and the second connecting hole 531, then insert and tighten the bolts to fix the length of the telescopic rod 52. By selecting different positions for matching the first connecting hole 521 and the second connecting hole 531, multiple extension and retraction adjustments of the telescopic rod 52 within a preset range can be achieved, thereby changing the overall height of the mounting bracket 5.

[0045] Three support rods 54 are distributed at 120° intervals. Each support rod 54 has an internal threaded hole at its end. The adjusting bolt 55 is threaded to the internal threaded hole. When the mounting bracket 5 is placed on the upper surface of the piston 2, if the second connecting flange 51 is tilted, the adjusting bolt 55 on the corresponding support rod 54 can be rotated to change the screw depth of the adjusting bolt 55 in the internal threaded hole of the support rod 54. By adjusting the screw depth of the three adjusting bolts 55 respectively, the horizontal state of the support cylinder 53 can be finely adjusted, thereby driving the telescopic rod 52 and the second connecting flange 51 to achieve horizontal adjustment, ensuring that the mounting plane of the second connecting flange 51 is horizontal, and finally realizing the horizontal adjustment of the video acquisition device 3.

[0046] Example 4: Furthermore, the support cylinder 53 is provided with a first fixing ring 532, and the support rod 54 is provided with a second fixing ring 541. The first fixing ring 532 and the second fixing ring 541 are connected by a connecting rod 57.

[0047] In specific implementation, the connection between the connecting rod 57 and the first fixing ring 532 / second fixing ring 541 can be achieved by providing through holes at both ends of the connecting rod 57 and connecting it to the first fixing ring 532 / second fixing ring 541 using screws and nuts. Alternatively, elastic buckles can be provided on the first fixing ring 532 and second fixing ring 541, with matching slots at both ends of the connecting rod 57. Aligning the slots at both ends of the connecting rod 57 with the buckles and pressing them down, the buckles engage with the slots for quick connection. Disassembly is achieved by pressing the elastic tabs of the buckles.

[0048] The support rod 54 is connected to the magnetic foot 56, which is prone to wobbling due to piston 2 vibration. The connecting rod 57, connecting the first fixing ring 532 and the second fixing ring 541, provides oblique support to the support rod 54, limiting its radial displacement and improving its bending and vibration resistance. The connecting rod 57 also allows the three support rods 54 to form a linked structure, preventing tilting caused by excessive force on a single support rod 54. Especially during piston 2 lifting and lowering, it balances the force on each support rod 54, preventing the mounting bracket 5 from shifting or tipping over. The fixed length of the connecting rod 57 ensures that the angle between the three support rods 54 remains at 120°, preventing the mounting bracket 5's center of gravity from shifting due to angular deviations during installation and ensuring accurate installation of the video acquisition device 3. A stable triangular support structure is formed between the support cylinder 53 and the support rod 54 via a connecting rod 57. This triangular support structure evenly distributes the total weight of the mounting bracket 5 and the video acquisition device 3 across the three support rods 54, preventing tilting or swaying caused by excessive local stress on the support cylinder 53 and ensuring stable operation of the video acquisition device 3 even in complex environments. Compared to four or more points of support, by setting three support rods 54, only three support points are needed to form a stable plane, which can better accommodate minor unevenness on the surface of the piston 2. Horizontal installation can be achieved by fine-tuning the bolts 55, reducing the requirements for the flatness of the piston 2 surface.

[0049] Example 5: Furthermore, the bottom of the adjusting bolt 55 is provided with a spherical protrusion 551, and the magnetic foot 56 is provided with a spherical groove 561 that matches the spherical protrusion 551. The spherical protrusion 551 is embedded in the spherical groove 561 to realize multi-angle adjustment of the adjusting bolt 55 relative to the magnetic foot 56.

[0050] In practical implementation, the surface of the spherical protrusion 551 can be polished, and the inner wall of the spherical groove 561 can be coated with a grease layer to reduce the coefficient of friction between the spherical protrusion 551 and the inner wall of the spherical groove 561, facilitating the multi-angle rotation of the adjusting bolt 55. However, since the piston 2 in the prior art is usually a curved structure, the arrangement of the mounting bracket 5 will inevitably be affected by the curved surface, such as... Figure 6 As shown, the mounting bracket 5 is positioned on a slope. In this case, the bottom surface of the magnetic foot 56 needs to be in contact with the slope surface to ensure stable adsorption. Since the spherical protrusion 551 can rotate within the spherical groove 561, the adjusting bolt 55 can be tilted at multiple angles around the center of the spherical protrusion 551. This allows for the horizontal installation of the support rod 54 while ensuring that the bottom surface of the magnetic foot 56 is always in close contact with the upper surface (slope) of the piston 2. At the same time, it avoids the problem of reduced adsorption area and decreased adsorption force caused by the tilt of the magnetic foot 56, thus ensuring the stability of the video acquisition device 3.

[0051] Example 6: Furthermore, the first protective shell 31 and the second protective shell 32 are symmetrically arranged on both sides of the fixed compartment 34.

[0052] In specific implementation, the first protective shell 31 and the second protective shell 32 can be symmetrically distributed with the vertical central axis of the fixed chamber 34 as the axis of symmetry; the mounting holes for installing the first rotating mechanism 33 and the second rotating mechanism 35 on the two side walls of the fixed chamber 34 are symmetrically positioned, the axes of the first rotating mechanism 33 and the second rotating mechanism 35 are on the same horizontal plane and perpendicular to the central axis of the fixed chamber 34; the bottom of the first protective shell 31 and the second protective shell 32 are equidistant from the bottom of the fixed chamber 34, ensuring that the center of gravity of the two is evenly distributed on both sides of the central axis of the fixed chamber 34.

[0053] The first protective shell 31 and the second protective shell 32 are symmetrically distributed, and their weight is balanced on both sides of the fixed chamber 34. The overall center of gravity of the fixed chamber 34 falls on the rotation center axis of the third rotating mechanism 36. This avoids the third rotating mechanism 36 from bearing additional eccentric torque due to the center of gravity shift, reduces the motor load of the rotating mechanism, and extends the motor's service life. The centered center of gravity also prevents the fixed chamber 34 from "jamming" or "wobbling" during rotation due to the center of gravity shift, ensuring the angular accuracy when the third rotating mechanism 36 drives the fixed chamber 34 to rotate. This, in turn, ensures the accurate scanning angle of the first imager 311 and the second imager 321, avoiding imaging deviation caused by the center of gravity shift. The piston 2 inside the gas holder 1 will vibrate during the lifting and lowering process. The symmetrically distributed protective shells can make the fixed chamber 34 bear the force evenly during vibration, avoiding the fixed chamber 34 from tilting or loosening due to excessive weight on one side, and ensuring the overall structural stability of the video acquisition device 3. The symmetrical structure makes the installation positions of the first imager 311 and the second imager 321 symmetrical. During debugging, the angle calibration of the two imagers can be completed by using the central axis of the fixed chamber 34 as a reference, without the need to make complex position adjustments to the two imagers separately, thus shortening the debugging time.

[0054] Example 7: Furthermore, a first protective cover 38 is connected to the top of the first protective shell 31, and a second protective cover 39 is connected to the top of the second protective shell 32.

[0055] In specific implementation, the structures of the first protective cover 38 and the second protective cover 39 can both be designed as an "inverted U-shape" with the opening facing downwards. They are fixed to the top of the first protective shell 31 / second protective shell 32 by bolts. The coverage area of ​​the protective cover is larger than the top and upper half of the sides of the first protective shell 31 / second protective shell 32, which can shield the top and sides of the protective shell. At the same time, the edges of the protective cover can also be provided with downward folded edges to prevent liquids or dust from seeping into the gap between the protective shells from the edges of the protective cover.

[0056] There may be localized strong light (such as lighting during maintenance) or uneven lighting inside the gas holder 1. The transparent protective cover can diffusely reflect strong light, preventing glare caused by direct light shining on the lens of the first imager 311 and ensuring the clarity of the visible light image. There is a risk of parts becoming loose or falling off from the top or side walls of the gas holder 1. The impact-resistant properties of the protective cover can prevent falling objects from directly impacting the first protective shell 31 / second protective shell 32, preventing damage to the protective shells that could damage the imager, and also preventing the lens from shattering if a falling object hits it.

[0057] Example 8: Furthermore, the upper surface of piston 2 is pre-set with N monitoring points, where N is an integer greater than or equal to 1. Each monitoring point is equipped with a mounting bracket 5, and each mounting bracket 5 is connected to a video acquisition device 3.

[0058] In practice, the location of monitoring points can be flexibly adjusted according to the user's needs. Several optimized monitoring point layout schemes are given below: Monitoring points should be prioritized for key areas on the upper surface of piston 2 (such as the sealing contact area between piston 2 and the inner wall of gas holder 1, the connection area of ​​piston 2 support column, and the corresponding areas of gas inlet and outlet). These areas are prone to sealing leaks, deformation or corrosion caused by structural stress concentration, and should be monitored in detail.

[0059] Monitoring points in non-critical areas can be evenly distributed along the circumference or radial direction of the upper surface of piston 2 to ensure that the monitoring data on the force and motion state of piston 2 surface are representative and to avoid local data overload or data loss in other areas due to concentrated monitoring points.

[0060] The monitoring points should avoid obstacles (such as valves, pipes, junction boxes) on the upper surface of piston 2, and at the same time ensure that the magnetic feet 56 of the mounting bracket 5 can be stably attached and that there are no obstructions affecting the scanning field of view of the video acquisition device 3.

[0061] By setting up multiple monitoring points, data collection at multiple points can form data redundancy and cross-validation. When the data of a certain video acquisition device 3 is abnormal, the cause of the abnormality (such as equipment failure or actual hidden danger) can be judged by comparing the data of adjacent points, avoiding the early warning deviation caused by misjudgment of a single data point. The images and data collected in real time from multiple points can be transmitted to the control terminal 4, and the overall motion trajectory and state distribution map of piston 2 can be generated through data fusion algorithm, which is convenient for analyzing the dynamic change law of piston 2 during the lifting process and identifying potential hidden dangers in advance (such as the local tilting trend of piston 2).

[0062] Example 9: Furthermore, the monitoring points include central monitoring points and edge monitoring points. The central monitoring points are located in the central area of ​​the upper surface of piston 2, and the edge monitoring points are evenly distributed in the edge area of ​​the upper surface of piston 2, with no less than 3 edge monitoring points.

[0063] In practice, the video acquisition device 3 at the central monitoring point can mainly monitor the structural status of the central area of ​​piston 2 and the vertical displacement of piston 2 as a whole (by comparing with the reference point at the top of gas holder 1). At the same time, it can also serve as a reference point for global monitoring and provide reference coordinates for the data of the edge monitoring points.

[0064] The edge monitoring points are evenly distributed on the edge area of ​​the upper surface of the piston 2, and the number is not less than 3 (such as 3, 4 or 6). The central angle between adjacent edge monitoring points is equal (such as 120° interval between 3 points and 90° interval between 4 points). The video acquisition device 3 of this type of point can focus on monitoring the sealing gap between the piston 2 and the inner wall of the gas holder 1, the deformation and corrosion of the piston 2 edge, and the lifting speed and tilting state of the piston 2 edge.

[0065] The central monitoring point provides baseline data for the overall movement of piston 2 (such as vertical displacement), while the edge monitoring points provide detailed data for key local areas (sealing gaps, edge structures). Combining these two methods comprehensively reflects the overall state and local details of piston 2, avoiding monitoring defects that prioritize either the overall picture or the details. There are at least three edge monitoring points, evenly distributed. Data such as the distance between the edge of piston 2 and the inner wall of gas holder 1, and the height of the edge of piston 2, collected by the video acquisition device 3 at each edge point, can be used to calculate the tilt angle and direction of piston 2. For example, if the edge height of piston 2 at one of the three edge monitoring points is higher than the other two, it can be determined that piston 2 is tilted to the opposite side of that point. The control terminal 4 can quantify the degree of tilt using data algorithms and trigger an early warning in a timely manner. The sealing gap between piston 2 and the inner wall of gas holder 1 is crucial for preventing gas leakage. The edge monitoring points are close to the sealing area, allowing for close-range image acquisition of the sealing gap. Image recognition algorithms can then accurately measure the gap width.

[0066] Example 10: Furthermore, the outer periphery of the third rotating mechanism 36 is provided with a marking ring for imaging marking.

[0067] In practice, the marking rings can be made of high-contrast materials, specifically reflective marking rings or color-contrast marking rings. Reflective marking rings can be made by attaching a reflective film (such as glass microsphere reflective film) to the outer cylindrical surface of the third rotating mechanism 36. The marking rings are continuously distributed along the circumference of the third rotating mechanism 36, forming a distinct bright ring in the image of the first imager 311 (visible light imager). Color-contrast marking rings can be formed by spraying high-temperature and corrosion-resistant colored paint (such as red or yellow) onto the outer circumference of the third rotating mechanism 36. The color of the marking rings forms a significant color difference from the body color of the third rotating mechanism 36 (usually gray, black, or silver-white), making them clearly identifiable in the visible light image. The central axis of the marking rings can coincide with the rotation center axis of the third rotating mechanism 36, ensuring that the marking rings always move in a circular motion around the rotation center when the third rotating mechanism 36 rotates, without any eccentric deviation. The marking ring is positioned on the outer periphery of the third rotating mechanism 36, which is located on top of the mounting bracket 5, in the upper-middle position of the video acquisition device 3. It is positioned above most obstacles (such as pipes and valves) on the upper surface of the piston 2, and there are no obstructions blocking the imaging field of view. The reflective or high-chromatic-difference marking ring is clearly identifiable in the visible light image of the first imager 311. Even in dim lighting conditions inside the gas tank 1, the reflective marking ring remains clearly visible by reflecting ambient light (such as maintenance lights or auxiliary light sources for the imager), avoiding detection failures due to lighting issues. When the third rotating mechanism 36 rotates, the marking ring rotates synchronously with it. Regardless of the rotation angle of the third rotating mechanism 36, the marking ring remains within the scanning range of the first imager 311 and will not fall out of the monitoring field of view due to rotation.

[0068] During specific calibration, each video acquisition device 3 has a marker ring on its third rotating mechanism 36. The control terminal 4 pre-stores the standard dimensions of the marker ring (such as diameter and width) and the rotation parameters of the third rotating mechanism 36 (such as rotation speed and step angle). When the third rotating mechanism 36 drives the fixed chamber 34 to rotate, the first imager 311 acquires the image of the marker ring in real time. The control terminal 4 extracts the pixel size and rotation trajectory of the marker ring through an image recognition algorithm and compares it with the pre-stored standard parameters. If there is a deviation (such as the pixel diameter of the marker ring becoming smaller, indicating a change in imaging distance), the rotation angle of the third rotating mechanism 36 or the focal length of the first imager 311 is automatically adjusted to achieve the angle and focal length calibration of the video acquisition device 3 and ensure accurate monitoring angle.

[0069] More specifically, the video acquisition device 3 at the central monitoring point can be used as a reference, with its marker ring serving as the global coordinate origin reference. The video acquisition device 3 at the edge monitoring point acquires images of the relative positions of its own marker ring and the central marker ring. The control terminal 4 calculates the relative coordinates of the edge point and the central point based on the ratio of the pixel distance between the two marker rings to the actual installation distance, thereby realizing the coordinate association of multiple video acquisition devices 3 and ensuring that the images acquired by each device can be accurately stitched into the overall image of the piston 2.

[0070] Taking one central video acquisition device 3 and three edge video acquisition devices 3 as an example. The video acquisition device 3 (A) at the central monitoring point and the three edge monitoring point video acquisition devices 3 (B1, B2, B3) all acquire images of their own marker rings. An image recognition algorithm is used to extract the vertical pixel distance from a fixed reference point on the marker ring (such as a notch or a specific color block on the marker ring) to the top baseline of the gas holder 1 (such as the top beam of the gas holder 1). The control terminal 4 converts the vertical pixel distance of each marker ring reference point into the actual height (H) based on a pre-stored calibration coefficient of "pixel distance - actual height" (calibrated through actual measurement during installation). A H B1 H B2 H B3 Due to the height H of the center point A. A The actual height of the center of piston 2, and the heights H of edge points B1, B2, and B3. B1 H B2 H B3 This represents the actual height of the position corresponding to the edge of piston 2; calculate the height difference between the edge point and the center point (ΔH1=H). B1 -H A ΔH2=H B2 -H A ΔH3=H B3 -H A If the absolute value of a certain height difference exceeds a preset threshold (e.g., ±5mm), it can be determined that piston 2 is tilted to the opposite side of that edge point. Simultaneously, based on the numerical distribution of the three height differences, the tilt angle and direction of piston 2 can be calculated using trigonometric functions. When the calculated tilt angle exceeds the allowable tilt angle for safe operation of gas holder 1 (e.g., 0.5°), control terminal 4 can immediately trigger an audible and visual warning and mark the tilt area and tilt angle on the visual monitoring image, prompting personnel to take adjustment measures (e.g., adjusting the support pressure below piston 2).

[0071] In summary, this utility model is applied to gas holder monitoring and has the advantages of eliminating the safety risks of manual monitoring and capturing piston anomalies in real time.

[0072] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A video monitoring system for a gas holder, wherein a piston (2) is provided inside the gas holder (1), characterized in that: The video monitoring system includes a video acquisition device (3) installed above the piston (2) and a control terminal (4) installed outside the gas holder (1). The video acquisition device (3) includes a first imager (311) encapsulated inside a first protective shell (31) and a second imager (321) encapsulated inside a second protective shell (32). The first imager (311) is a visible light imager, and the second imager (321) is a non-visible light imager. Both the first imager (311) and the second imager (321) are electrically connected to the control terminal (4). The first protective shell (31) is connected to the fixed chamber (34) through a first rotating mechanism (33), and the second protective shell (32) is connected to the fixed chamber (34) through a second rotating mechanism (35). The bottom of the fixed chamber (34) is connected to the mounting bracket (5) through a third rotating mechanism (36), and the mounting bracket (5) is connected to the upper surface of the piston (2).

2. The video monitoring system inside a gas holder according to claim 1, characterized in that: The bottom of the third rotating mechanism (36) is connected to a first connecting flange (37), and the top of the mounting bracket (5) is connected to a second connecting flange (51). The first connecting flange (37) and the second connecting flange (51) are connected by bolts.

3. The video monitoring system inside the gas holder according to claim 2, characterized in that: The second connecting flange (51) is connected to the top of the telescopic rod (52), the telescopic rod (52) is inserted into the support cylinder (53), the telescopic rod (52) is provided with a plurality of first connecting holes (521), the support cylinder (53) is provided with a second connecting hole (531) corresponding to the first connecting hole (521), the first connecting hole (521) and the second connecting hole (531) are connected by bolts to realize the telescopic adjustment of the telescopic rod (52); The bottom of the support cylinder (53) is connected to three support rods (54), which are distributed at 120° intervals. The end of each support rod (54) is connected to a magnetic foot (56) by an adjusting bolt (55). The magnetic foot (56) is magnetically attracted to the upper surface of the piston (2).

4. The video monitoring system inside the gas holder according to claim 3, characterized in that: The support cylinder (53) is provided with a first fixing ring (532), and the support rod (54) is provided with a second fixing ring (541). The first fixing ring (532) and the second fixing ring (541) are connected by a connecting rod (57).

5. The video monitoring system inside the gas holder according to claim 4, characterized in that: The bottom of the adjusting bolt (55) is provided with a spherical protrusion (551), and the magnetic foot (56) is provided with a spherical groove (561) that matches the spherical protrusion (551). The spherical protrusion (551) is embedded in the spherical groove (561) to realize multi-angle adjustment of the adjusting bolt (55) relative to the magnetic foot (56).

6. The video monitoring system inside the gas holder according to any one of claims 1 to 5, characterized in that: The first protective shell (31) and the second protective shell (32) are symmetrically arranged on both sides of the fixed chamber (34).

7. The video monitoring system inside the gas holder according to any one of claims 1 to 5, characterized in that: The first protective shell (31) is connected to the top of a first protective cover (38), and the second protective shell (32) is connected to the top of a second protective cover (39).

8. The video monitoring system inside the gas holder according to any one of claims 1 to 5, characterized in that: The upper surface of the piston (2) is pre-set with N monitoring points, where N is an integer greater than or equal to 1. Each monitoring point is provided with a mounting bracket (5), and each mounting bracket (5) is connected to a video acquisition device (3).

9. The video monitoring system inside the gas holder according to claim 8, characterized in that: The monitoring points include central monitoring points and edge monitoring points. The central monitoring point is located in the central area of ​​the upper surface of the piston (2), and the edge monitoring points are evenly distributed in the edge area of ​​the upper surface of the piston (2). The number of edge monitoring points is not less than 3.

10. The video monitoring system inside the gas holder according to claim 9, characterized in that: The outer periphery of the third rotating mechanism (36) is provided with a marking ring for imaging marking.

Images