Under-pressure detection method and device for leakage point of high-pressure gas storage

Abstract

The invention relates to the technical field of under-pressure detection, in particular to a high-pressure gas storage leakage point under-pressure detection device which comprises a mechanical arm, the mechanical arm comprises a base, a large arm is movably hinged to the middle of the upper surface of the base, and a first supporting arm and a second supporting arm are hinged to the other end of the large arm in an L shape. Fixing seats are movably mounted at the other ends of the first supporting arm and the second supporting arm, an infrared thermal imaging detector is fixedly mounted at the other end of the first supporting arm through the fixing seat, fixing supports are fixedly mounted at the other end of the second supporting arm through the fixing seat, and a film sensor is fixedly mounted on the sides, close to each other, of the inner surfaces of the fixing supports; supporting legs are fixedly arranged on the outer surface of the side, away from the second supporting arm, of the fixing support, and an integrated machine is fixedly installed in the middle of the upper surface of the fixing support. According to the invention, comprehensive detection of the wall surface of the high-pressure gas storage is facilitated, whether gas leakage exists on the wall surface is found, the use risk of the high-pressure gas storage is reduced, and the gas storage effect is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of pressure detection technology, and in particular to a method and device for pressure detection of leakage points in a high-pressure gas storage reservoir. Background Art

[0002] Compressed gas energy storage technology is a physical energy storage method that uses compressed air to store energy. It has broad development prospects. The gas storage facilities used for compressed gas energy storage technology usually adopt underground gas storage, such as lined artificial chambers, which have attracted attention due to their flexible site selection, good air tightness and stability. However, the leakage problem of gas storage chambers is one of the main challenges facing this technology. Leakage will lead to a decrease in energy storage efficiency and an increase in safety hazards. Therefore, in order to meet the needs of actual engineering projects, correctly finding the location of the leakage point is a key issue that urgently needs to be solved.

[0003] In order to find the problem of leakage point detection, there are various forms of measuring devices and methods. After searching, patent announcement numbers CN220287176U, CN220186567U, and CN208014140U respectively disclose a leakage detection device for steam pipes, a portable gas pipe leakage detection instrument, and an air source absorption heat pump for heating medium leakage detection and alarm. However, such devices and methods are for the detection of gas pipeline leakage, and are not of much help in the leakage detection of large gas storage facilities. Secondly, they are not suitable for leakage point detection under high pressure conditions and are not suitable for large-scale detection.

[0004] Based on this, in order to meet the actual engineering needs, it is of great significance to develop a detection device and method that can withstand high pressure and be suitable for a wide range in large gas storage facilities. A method and device for pressurized detection of leakage points in high-pressure gas storage facilities are proposed. Summary of the invention

[0005] The main purpose of the present invention is to provide a method and device for detecting leakage points of a high-pressure gas storage reservoir under pressure, so as to overcome the problems mentioned in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides a pressure detection device for leakage point of a high-pressure gas storage reservoir, comprising a mechanical arm, the mechanical arm comprising a base, a large arm is movably hingedly installed in the middle of the upper surface of the base, the other end of the large arm is "L" shaped and respectively hingedly installed with a first arm and a second arm, and the other ends of the first arm and the second arm are both movably installed with a fixed seat;

[0007] An infrared thermal imaging detector is fixedly installed on the other end of the first arm through a fixing seat, and a fixed bracket is fixedly installed on the other end of the second arm through a fixing seat, a thin film sensor is fixedly installed on the side close to the inner surface of the fixed bracket, a supporting leg is fixedly provided on the outer surface of the fixed bracket away from the second arm, and an integrated machine is fixedly installed in the middle of the upper surface of the fixed bracket.

[0008] As a further improvement of the present invention, assembly holes are formed through the four corners of the upper surface of the base.

[0009] As a further improvement of the present invention, the integrated machine is provided with a path preset module and a pressure difference sensing module;

[0010] The path preset module is used to preset the detection movement path, divide the total detection area of ​​the gas storage reservoir into a number of detection areas corresponding to the detection area of ​​the thin film sensor, and number the several detection areas in sequence, arbitrarily select the detection areas for grouping and extract their center lines, and form a movement detection path based on the center line;

[0011] The pressure difference sensing module estimates the pressure difference score through the deformation amplitude during the film sensor detection, determines the leakage intensity of the gas storage leakage point according to the pressure difference score, and generates a corresponding leak repair signal in combination with the detection area number corresponding to the mobile detection path and transmits it to the mobile terminal of the leak repair personnel.

[0012] A method for detecting leakage points of a high-pressure gas storage reservoir under pressure, comprising the following steps:

[0013] Step 1: Use a robotic arm to carry both the infrared thermal imaging detector and the thin film sensor and move them along the preset detection moving path on the indoor wall. Use the infrared thermal imaging detector to find the position where there is an obvious temperature anomaly on the preset detection moving path, and match the position with each detection area that constitutes the preset detection moving path, obtain the detection area number corresponding to the temperature anomaly position, and mark it as an abnormal area;

[0014] Step 2: Based on the acquired abnormal area, the robotic arm controls the second arm to replace the thin film sensor with a detection device, and places the thin film sensor on the wall surface corresponding to the abnormal area for detection;

[0015] Step 3: The robotic arm controls the thin film sensor to perform fitting detection on the wall surface corresponding to the abnormal area. If there is a leak in the abnormal area, the airflow discharged through the leak will contact the thin film sensor. The contact position between the thin film sensor and the airflow will be deformed, and a pressure difference will be formed on both sides of the thin film sensor, thereby obtaining the specific position of the leak.

[0016] Beneficial effects of the present invention:

[0017] The present invention can independently set the detection path according to actual engineering needs, and perform large-scale real-time detection of the wall surface of the high-pressure gas storage reservoir based on the detection path, which is conducive to realizing comprehensive detection of the wall surface of the high-pressure gas storage reservoir and finding out whether there is any gas leakage on the wall surface, so as to reduce the use risk of the high-pressure gas storage reservoir and ensure the gas storage effect. At the same time, for the joint positions where the possibility of leakage is high, multiple repeated detections can be performed by using the setting of autonomous detection paths to ensure detection accuracy and reduce detection errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 is a flow chart of the detection method of the present invention;

[0020] Figure 2 It is a schematic diagram of the front three-dimensional structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the disassembly of the mechanical arm structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the disassembly of the thin film sensor structure of the present invention.

[0023] In the figure: 1. Robotic arm; 101. Base; 102. Upper arm; 103. First arm; 104. Second arm; 105. Fixed base; 2. Infrared thermal imaging detector; 3. Thin film sensor; 301. Fixed bracket; 302. Support leg; 303. Integrated machine. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] See also Figure 1-Figure 4 As shown, a pressure detection device for leakage point of a high-pressure gas storage reservoir comprises a mechanical arm 1, the mechanical arm 1 comprises a base 101, four corners of the upper surface of the base 101 are penetrated with assembly holes, a large arm 102 is movably hingedly installed in the middle of the upper surface of the base 101, the other end of the large arm 102 is respectively hingedly installed with a first arm 103 and a second arm 104 in an "L" shape, and the other ends of the first arm 103 and the second arm 104 are movably installed with a fixing seat 105;

[0029] The other end of the first arm 103 is fixedly mounted with an infrared thermal imaging detector 2 through a fixing seat 105, the other end of the second arm 104 is fixedly mounted with a fixing bracket 301 through a fixing seat 105, the inner surfaces of the fixing brackets 301 are close to each other and a thin film sensor 3 is fixedly mounted on one side, a supporting leg 302 is fixedly mounted on the outer surface of the fixing bracket 301 away from the second arm 104, and an integrated machine 303 is fixedly mounted in the middle of the upper surface of the fixing bracket 301;

[0030] The infrared thermal imaging detector 2 and the thin film sensor 3 are controlled to move by the mechanical arm 1, and the infrared thermal imaging detector 2 is used to detect the temperature of the wall of the gas storage reservoir to obtain the area with obvious temperature anomaly. At the same time, the thin film sensor 3 is used to detect air leakage in the area with obvious temperature anomaly, and the thin film sensor 3 is fitted with the wall of the abnormal area. The support legs 302 set by the fixed bracket 301 provide a support effect when the thin film sensor 3 is fitted with the wall of the abnormal area, and a gap is controlled between the thin film sensor 3 and the wall of the abnormal area. At the same time, the upper and lower parts of the thin film sensor 3 that are in contact with the wall of the abnormal area are both in a closed state. In this case, the airflow generated by the leakage on the wall of the abnormal area can only flow toward the two sides of the thin film sensor 3, which is conducive to reducing the error caused by the movement when finding the leakage point. The integrated machine 303 can be used to preset the detection movement path and detect the intensity of the leakage point.

[0031] The integrated machine 303 is equipped with a path preset module and a pressure difference sensing module;

[0032] The path preset module is used to preset the detection movement path, divide the total detection area of ​​the gas storage reservoir into several detection areas corresponding to the detection area of ​​the thin film sensor 3, and number the several detection areas in sequence, arbitrarily select the detection areas for grouping and extract their center lines, and form the movement detection path based on the center line;

[0033] The specific analysis is as follows: the detection area of ​​the thin film sensor 3 is set as S1, the total detection area of ​​the gas storage reservoir is set as S2, and the plane diagrams corresponding to S1 and S2 are respectively input into the computer, and the plane diagram S1 is filled onto the plane diagram S2. When the plane diagram S1 is fully filled with the plane diagram S2, several plane diagrams S1 can be numbered in sequence from bottom to top in a horizontal manner, S11, S12, S13, ... to obtain several detection areas. For the incomplete areas in the total detection area S2 of the gas storage reservoir that are not filled with the detection area S1 of the thin film sensor 3, they are also numbered according to the complete filling area, and the detection areas S11 to S19 are selected for grouping. The midpoints on both sides of the detection areas S11 to S19 are extracted to connect the center line in a straight line, and the mobile detection path one is set based on this center line;

[0034] The wall of the gas storage reservoir is covered by setting up multiple groups of mobile detection paths. When setting up the mobile detection paths, the corresponding area of ​​the detection area is constructed by the detection area of ​​the film sensor 3. The detection area of ​​the film sensor 3 matches the detection areas that constitute the detection path. The fixed bracket 301 that fixes the film sensor 3 will be outside the detection area during the detection process, thereby ensuring the accuracy of the detection of the film sensor 3 and reducing the detection error.

[0035] The pressure difference sensing module estimates the pressure difference fraction through the deformation amplitude of the thin film sensor 3 during detection, determines the leakage intensity of the gas storage leakage point according to the pressure difference fraction, and generates a corresponding leakage repair signal in combination with the detection area number corresponding to the mobile detection path and transmits it to the mobile terminal of the leakage repair personnel;

[0036] The specific analysis is as follows: if there is a leak in the detection area, the air pressure leaked from the leak will contact the film sensor 3, and the film sensor 3 will be deformed, causing the resistance value on the film to change. The deformation increase interval is set, and the increase of 0.5%-2.5% is set as the first-level increase interval, corresponding to the pressure difference score of 10, indicating that the leakage intensity is the first level, the increase of 2.5%-4% is set as the second-level increase interval, corresponding to the pressure difference score of 20, indicating that the leakage intensity is the second level, the increase of 4%-5% is set as the third-level increase interval, corresponding to the pressure difference score of 30, indicating that the leakage intensity is the third level, and the increase greater than 5% is set as the fourth-level increase interval, corresponding to the pressure difference score of 60, indicating that the leakage intensity is the fourth level. The initial resistance value and the final resistance value of the film sensor 3 are set as QC and QM respectively, and substituted into the formula Obtain the resistance value amplification rate zf, match zf with the deformation amplification interval, and the successfully matched amplification interval has a high level, indicating that the deformation amplitude of the film sensor 3 is high, and obtain the corresponding pressure difference score to match the corresponding leakage point leakage intensity level;

[0037] The leak repair signal is generated specifically as follows: for example, if the current leak point is the S13 area in the detection path one and the leak intensity is level three, then a leak repair signal is generated as the leak intensity level three in the S13 area of ​​the path one and is sent to the mobile terminal of the leak repair personnel.

[0038] A method for detecting leakage points of a high-pressure gas storage reservoir under pressure, comprising the following steps:

[0039] Step 1: The robot arm 1 carries the infrared thermal imaging detector 2 and the thin film sensor 3 at the same time and moves along the preset detection moving path on the indoor wall. The infrared thermal imaging detector 2 is used to find the position with obvious temperature anomaly on the preset detection moving path, and the position is matched with each detection area constituting the preset detection moving path, and the detection area number corresponding to the temperature anomaly position is obtained, and it is marked as an abnormal area;

[0040] The specific analysis is as follows: the movement in step 1 is performed according to the detection movement path preset by the path preset module to ensure that there is no repetition in a movement detection, thereby achieving efficiency guarantee;

[0041] Step 2: Based on the acquired abnormal area, the robot arm 1 controls the second arm 104 to replace the thin film sensor 3 with a detection device, and places the thin film sensor 3 on the wall surface corresponding to the abnormal area for detection;

[0042] The specific analysis is as follows: the thin film sensor 3 includes an elastic sensitive element and a conversion element, and multiple unit flexible film units are arranged in an array on the surface of the thin film sensor 3 through electrodes or wires to form a dot matrix;

[0043] Step three: The robot arm 1 controls the film sensor 3 to perform fitting detection on the wall surface corresponding to the abnormal area. If there is a leak in the abnormal area, the airflow discharged through the leak will contact the film sensor 3. The film sensor 3 will be deformed at the contact position with the airflow, and a pressure difference will be formed on both sides of the film sensor 3, thereby completing the acquisition of the specific position of the leak.

[0044] When the present invention is in use, firstly, the detection moving path is preset by the integrated machine 5, and the infrared thermal imaging detector 2 is controlled by the robot arm 1 to move along the detection moving path on the indoor wall of the gas storage. When the infrared thermal imaging detector 2 finds an area with obvious temperature anomalies, the detection device is replaced by the thin film sensor 3 by the robot arm 1, and the thin film sensor 3 is bonded to the wall surface of the abnormal area. During the bonding process, the support legs 302 will provide a closed support effect between the thin film sensor 3 and the wall surface of the abnormal area. In this case, the airflow generated by the leakage on the wall surface of the abnormal area can only flow toward the two sides of the thin film sensor 3, which is conducive to reducing the error caused by the movement when searching for the leakage point. When the abnormal area avoids the leakage point, the air pressure discharged by the leakage will contact the thin film sensor 3. At this time, the judgment of the leakage intensity of the leakage point is completed by the integrated machine 303, and the leakage point area is detected.

[0045] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A pressure detection device for leak points in a high-pressure gas storage reservoir, comprising a mechanical arm (1), characterized in that: The mechanical arm (1) comprises a base (101), a large arm (102) is movably hingedly mounted in the middle of the upper surface of the base (101), the other end of the large arm (102) is respectively hingedly mounted with a first support arm (103) and a second support arm (104) in an "L" shape, and the other ends of the first support arm (103) and the second support arm (104) are both movably mounted with a fixed seat (105); The other end of the first arm (103) is fixedly mounted with an infrared thermal imaging detector (2) via a fixing seat (105), the other end of the second arm (104) is fixedly mounted with a fixing bracket (301) via a fixing seat (105), a thin film sensor (3) is fixedly mounted on the inner surfaces of the fixing brackets (301) on the sides close to each other, a supporting leg (302) is fixedly mounted on the outer surface of the fixing bracket (301) away from the second arm (104), and an integrated machine (303) is fixedly mounted in the middle of the upper surface of the fixing bracket (301).

2. A pressure detection device for leakage points of a high-pressure gas storage reservoir according to claim 1, characterized in that: The four corners of the upper surface of the base (101) are all provided with assembly holes.

3. A pressure detection device for leakage point of a high-pressure gas storage reservoir according to claim 1, characterized in that: The integrated machine (303) is internally provided with a path preset module and a pressure difference sensing module; The path preset module is used to preset the detection movement path, divide the total detection area of ​​the gas storage reservoir into a plurality of detection areas corresponding to the detection area of ​​the thin film sensor (3), and number the plurality of detection areas in sequence, arbitrarily select the detection areas for grouping and extract their center lines, and form a movement detection path based on the center line; The pressure difference sensing module estimates the pressure difference fraction through the deformation amplitude of the thin film sensor (3) during detection, determines the leakage intensity of the gas storage leak point based on the pressure difference fraction, and generates a corresponding leak repair signal in combination with the detection area number corresponding to the mobile detection path, which is transmitted to the mobile terminal of the leak repair personnel.

4. A method for detecting leakage points of a high-pressure gas storage reservoir under pressure, characterized in that: The following steps are involved: Step 1: A robotic arm (1) carrying an infrared thermal imaging detector (2) and a thin film sensor (3) is moved along a preset detection moving path on the indoor wall, and a location with obvious temperature anomaly on the preset detection moving path is found by the infrared thermal imaging detector (2), and the location is matched with each detection area constituting the preset detection moving path, and the detection area number corresponding to the temperature anomaly location is obtained, and marked as an abnormal area; Step 2: Based on the acquired abnormal area, the robot arm (1) controls the second arm (104) to replace the thin film sensor (3) with a detection device, and places the thin film sensor (3) on the wall surface corresponding to the abnormal area for detection; Step 3: The robot arm (1) controls the thin film sensor (3) to perform fitting detection on the wall surface corresponding to the abnormal area. If there is a leak in the abnormal area, the airflow discharged through the leak will contact the thin film sensor (3), and the contact position between the thin film sensor (3) and the airflow will be deformed, and a pressure difference will be formed between the positions on both sides of the thin film sensor (3), thereby completing the acquisition of the specific position of the leak.

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