Measuring tool for internal leakage rate of ball valve for natural gas pipeline

Abstract

The invention relates to the technical field of pipeline ball valve measuring devices, and discloses a measuring tool for the internal leakage rate of a ball valve for a natural gas pipeline, and the measuring tool comprises an extension mechanism which comprises a telescopic fixed frame, a first extension frame and a second extension frame, and the extension mechanism is internally provided with a chain assembly. And a supporting leg assembly which is unfolded along with the extension of the first extension frame is mounted in the fixing frame. According to the measuring tool for the internal leakage rate of the ball valve for the natural gas pipeline, the ball valve is detected by utilizing a plurality of wind cup groups arranged at different positions through the arranged detection assembly, and the plurality of wind cup groups correspond to all positions of the ball valve in a circumferential manner; during detection, leakage of the specific position of the ball valve can be known by observing rotation of the wind cup sets at different positions, the distance between the wind cup sets and the center position of the top cover plate can be adjusted, the device can flexibly face ball valves of different sizes, corresponding maintenance can be facilitated by knowing the specific leakage position of the ball valve, and the functionality of the device is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline ball valve measuring devices, in particular to a tool for measuring the internal leakage of a ball valve used in a natural gas pipeline. Background Art

[0002] Ball valve is a common valve type, widely used in petroleum, chemical, natural gas, water treatment, electric power and other fields. It can be used to control various fluid media such as water, oil, and gas. It is especially suitable for occasions that require fast opening and closing and strict sealing. It is also often used in pipeline systems that require frequent operation. There is a circular through hole on the ball of the ball valve. The ball is connected to the actuator through the valve stem. When the valve stem drives the ball to rotate, the through hole on the ball coincides with or is perpendicular to the axis of the pipeline, realizing the opening and closing of the valve to control the flow of the fluid.

[0003] As an important energy source, natural gas plays a key role in many fields such as industrial production and residents' lives. The natural gas pipeline transportation system is the basis for ensuring a stable supply of natural gas. As a key component for controlling the flow of natural gas in the pipeline system, the performance of the ball valve directly affects the safety and reliability of the entire pipeline system. During long-term use, the sealing surface between the valve seat and the ball may be worn, scratched or even damaged due to the erosion and corrosion of impurities in the natural gas and the influence of factors such as frequent switching operations, which may lead to internal leakage of the ball valve. Internal leakage will not only cause waste of natural gas resources and increase transportation costs, but may also cause safety hazards. For example, the accumulation of natural gas leakage may lead to serious accidents such as explosions and fires. Therefore, leak detection of ball valves is often required in daily use.

[0004] The prior art publication number is CN217784369U, which provides a tool for measuring the internal leakage of a ball valve for a natural gas pipeline, comprising: a fixed connecting device, a connecting pipe and a flow meter, the fixed connecting device comprising a fixed frame, a valve cavity sewage nozzle connector and a fixed thimble, the fixed thimble being threadedly connected to one end of the fixed frame, the other end of the fixed frame being rotatably connected to the middle part of the valve cavity sewage nozzle connector, the connecting pipe comprising an elbow and a pipeline, one end of the elbow being detachably connected to an end of the valve cavity sewage nozzle connector located outside the fixed frame, the other end of the elbow being detachably connected to one end of the pipeline, the inlet end of the flow meter being detachably connected to the other end of the pipeline, the installation is convenient, the operation is simple, the data on the internal leakage of the ball valve can be directly obtained, and a lot of manpower and time can be saved.

[0005] In the above-mentioned prior art, although a flow meter is installed to detect whether the ball valve is leaking, since the flow meter is a single detection device, it is impossible to accurately know where the ball valve is leaking. In the natural gas pipeline detection link, the detection method usually includes reserving detection points on the pipeline, and later inserting flow meters and other equipment to detect the flow conditions at the front and rear ends of the ball valve. The disadvantage of this detection method is that in a large natural gas pipeline structure, the specific leakage point of the large ball valve cannot be known. Although there are also means of detection through heat conduction and infrared in the prior art, there are many limitations. The temperature and humidity on site and the thermal conductivity of the material may affect the results, and the existing method of reserving detection points on the pipeline may cause pipeline leakage in the later stage.

[0006] It can be seen that a tool for measuring the internal leakage of ball valves used in natural gas pipelines is needed to solve the problems mentioned in the above background technology that the existing detection equipment cannot detect the specific leakage points of large ball valves and the method of reserving detection points on the pipeline is prone to cause later leakage. Summary of the Invention

[0007] The purpose of the present invention is to provide a tool for measuring the internal leakage of a ball valve for a natural gas pipeline, so as to solve the problems raised in the above background technology.

[0008] To solve the above technical problems, the present invention provides the following technical solution: a tool for measuring the internal leakage of a ball valve for a natural gas pipeline, comprising an extension mechanism, the extension mechanism comprising a retractable fixed frame, a first extension frame, and a second extension frame, wherein a chain assembly is installed inside the extension mechanism, a leg assembly is installed inside the fixed frame that is deployed as the first extension frame extends, a folding assembly is provided at the top end of the second extension frame, and a detection assembly is installed at the top end of the folding assembly; The chain assembly includes multiple sets of sprockets and chains meshed with the sprockets, including a first sprocket arranged at the top of the fixed frame, a second sprocket arranged vertically below the first sprocket, a third sprocket located horizontally to the second sprocket, a fourth sprocket located vertically above the third sprocket, and a fifth sprocket located below the first extension frame, the fourth sprocket being located above the first extension frame, a locking block being installed inside the second extension frame, and the locking block being located outside the chain on one side of the fourth sprocket; The detection component includes a fixed ring, and the fixed ring is penetrated by equidistantly arranged extension shafts. The extension shaft moves inside the fixed ring, and one end of the extension shaft is connected to an arc block. A wind cup group that rotates with the wind is arranged inside the arc block. A miniature camera is installed in the middle position of one side of the fixed ring.

[0009] Preferably, a telescopic track is provided between the fixed frame and the first extension frame, a telescopic track is provided between the first extension frame and the second extension frame, and the fixed frame is an inverted "7"-shaped structure.

[0010] Preferably, the chain assembly further includes a motor, and the motor is located on the rear side of the first sprocket, the motor, the first sprocket, the second sprocket and the third sprocket are all located inside the fixed frame, and the chain passes through the fixed frame and extends to the inside of the first extension frame.

[0011] Preferably, the leg assembly includes a storage rack, which moves inside the fixed rack, and the front end of the storage rack is hinged with a first hinged short axis, a first leg is provided on one side of the first hinged short axis, and the side of the first hinged short axis away from the first leg is connected to a hinged long axis, one end of the hinged long axis is hinged with a second hinged short axis, and the second hinged short axis is located at the rear end of the storage rack and hinged thereto, a spring is provided in the middle position of the storage rack, and the other end of the spring is located at the front side of the hinge at the second hinged short axis and the hinged long axis.

[0012] Preferably, a limiting block is provided on the outside of the storage rack, a limiting groove matching the limiting groove is provided inside the fixing rack, and a second leg is installed on the outside of the fixing rack, a notch groove is provided on the top of the fixing rack, and a limiting nail is installed inside the fixing rack, a connecting block is provided in the first extension rack, and the connecting block is connected to the storage rack.

[0013] Preferably, the folding assembly includes a telescopic shaft and a fixed column, and the fixed column is located at the top of the second extension frame, the telescopic shaft is installed on one side of the second extension frame, and the top of the telescopic shaft is connected to a sleeve, the sleeve is sleeved on the outside of the fixed column, and the outside of the sleeve is equidistantly hinged with an inclined hinge shaft, and a first triangular plate and a second triangular plate are arranged above the inclined hinge shaft, and the number of the first triangular plate and the second triangular plate is four groups, and the four groups of the first triangular plates and the second triangular plates are distributed in a rectangular shape.

[0014] Preferably, a hinge is provided between the first triangular plate and the second triangular plate, one side of the hinge is connected to a connecting shaft, and the end of the connecting shaft is hinged to a cross, and a rotating shaft is provided between the two adjacent groups of first triangular plates, and the rotating shaft is hinged to the end of the inclined hinge shaft.

[0015] Preferably, the detection component includes a top cover plate, and a plurality of straight grooves are equidistantly provided on the top cover plate, the top cover plate is installed on the top of the fixed ring, and a rotating plate is provided inside the fixed ring, a plurality of rotating grooves are equidistantly provided on the rotating plate, and an extension shaft is provided between the rotating plate and the top cover plate, and the upper and lower parts of the extension shaft are connected to limit blocks, and the upper limit block is located inside the straight groove and moves, and the lower limit block is located inside the rotating groove and moves.

[0016] Preferably, a bottom cover is provided below the interior of the fixing ring, and a plurality of groups of internal teeth are provided on the inner wall of the bottom cover. A driving motor is installed inside the bottom cover, and a gear is connected to the output end of the driving motor, and the gear is meshed with the internal teeth.

[0017] Compared with the prior art, the present invention has the following beneficial effects: First, the present invention realizes the detection of ball valves by using multiple groups of wind cup groups set at different positions through the detection components. Multiple wind cup groups correspond to various positions of the ball valve in a circular shape. During the detection, the leakage at the specific position of the ball valve can be known by observing the rotation of the wind cup groups at different positions. The distance between the wind cup group and the center position of the top cover plate is adjustable, and it can flexibly deal with ball valves of different sizes. Knowing the specific leakage position of the ball valve can facilitate corresponding maintenance, and the functionality of the device is enhanced.

[0018] Secondly, the present invention realizes that the three-section storage extension frame can be extended step by step by starting the chain assembly through the provision of the extension mechanism, chain assembly and leg assembly, which is convenient for adapting to pipes of different lengths. As the extension frame is extended, the leg assembly automatically unfolds to form legs, thereby facilitating the overall stable placement of the extension mechanism inside the pipe, and the device can operate smoothly. When the extension mechanism is stored, the leg assembly is automatically stored into the interior of the extension mechanism, reducing the floor space and facilitating use.

[0019] Third, the present invention realizes that the folding component can be freely unfolded and stored through the folding component. When the folding component is unfolded, the first triangular plate and the second triangular plate will form a flat rectangular plane, thereby smoothing the upper wind cup so that it is normally facing the ball valve side when used, which is convenient for later use. When the wind cup faces the ball valve for inspection, the folding component can be folded up without blocking the inspection, and the wind cup can rotate freely. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a cross-sectional view of the present invention; Figure 3 This is a disassembled diagram of the extended component structure of the present invention; Figure 4 For the present invention Figure 3 A magnified view of the structure at point A; Figure 5 This is a schematic structural diagram of the support leg assembly of the present invention; Figure 6 This is a diagram of the storage of the leg assembly of the present invention; Figure 7 This is a schematic diagram of the folding assembly structure of the present invention; Figure 8 This is a disassembled diagram of the folding assembly structure of the present invention; Figure 9 This is a schematic diagram of the structure of the detection component of the present invention; Figure 10 This is a structural breakdown diagram of the detection component of the present invention.

[0021] 1. Extension mechanism; 101. Fixed frame; 102. First extension frame; 103. Second extension frame; 104. Telescopic track; 105. Notch; 106. Lock block; 2. Chain assembly; 201. Motor; 202. First sprocket; 203. Second sprocket; 204. Third sprocket; 205. Fourth sprocket; 206. Fifth sprocket; 207. Chain; 3. Leg assembly; 301. Storage rack; 302. First articulated short axis; 303. First leg; 304. Articulated long axis; 305. Second articulated short axis; 306. Spring; 307. Second leg; 4. , folding component; 401, telescopic shaft; 402, fixed column; 403, sleeve; 404, tilt hinge shaft; 405, first triangular plate; 406, second triangular plate; 407, hinge; 408, connecting shaft; 409, cross; 5, detection component; 501, top cover plate; 502, straight groove; 503, fixed ring; 504, rotating plate; 505, rotating groove; 506, bottom cover plate; 507, inner teeth; 508, driving motor; 509, gear; 510, extension shaft; 511, limit block; 512, arc block; 513, wind cup group; 514, micro camera. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0023] See also Figures 1-6A tool for measuring the internal leakage of a ball valve for a natural gas pipeline includes an extension mechanism 1, the extension mechanism 1 including a retractable fixed frame 101, a first extension frame 102, and a second extension frame 103. A chain assembly 2 is installed inside the extension mechanism 1, and a leg assembly 3 is installed inside the fixed frame 101, which is deployed as the first extension frame 102 extends. The chain assembly 2 includes multiple sets of sprockets and chains 207 engaged with the sprockets, including a first sprocket 202 set at the top of the fixed frame 101, a second sprocket 203 set vertically below the first sprocket 202, a third sprocket 204 located horizontally to the second sprocket 203, a fourth sprocket 205 located vertically above the third sprocket 204, and a fifth sprocket 206 located below the first extension frame 102. The fourth sprocket 205 is located above the first extension frame 102. A locking block 106 is installed inside the second extension frame 103, and the locking block 106 is located outside the chain 207 on one side of the fourth sprocket 205.

[0024] In this embodiment, the use of the device is suitable for large natural gas pipelines because the device needs to be installed inside the pipeline. When the device is installed inside the pipeline, the outlet can be closed from the other end of the pipeline, which can provide a better detection environment. The device is equipped with a control system and a matching display system. The extension of the device, the folding and unfolding of the device, and the movement of the wind cup are all directly controlled by the controller, and the micro camera 514 is electrically connected to the display system of the device. The staff can control the start of the device by observing the display device. In this device, the wind cup group 513 not only includes the wind cup, but also a complete system, such as the shaft connected to the wind cup, the speed sensor and other equipment. When the leaked gas passes through the wind cup, the wind cup will rotate, and the sensor will send a signal to the display device. The user can observe the specific position of the ball valve at which the leak occurs through the display device.

[0025] Specifically, a telescopic track 104 is provided between the fixed frame 101 and the first extension frame 102 , and a telescopic track 104 is provided between the first extension frame 102 and the second extension frame 103 . The fixed frame 101 is an inverted “7”-shaped structure.

[0026] In this embodiment, when the first extension frame 102 and the second extension frame 103 are stored on one side of the fixed frame 101, the footprint of the device will be reduced, making the device easy to carry. When storing, the second leg 307 can be rotated to be stored on one side of the fixed frame 101.

[0027] Specifically, the chain assembly 2 also includes a motor 201, and the motor 201 is located on the rear side of the first sprocket 202. The motor 201, the first sprocket 202, the second sprocket 203 and the third sprocket 204 are all located inside the fixed frame 101. The chain 207 passes through the fixed frame 101 and extends to the inside of the first extension frame 102.

[0028] In this embodiment, a rotating shaft is provided on one side of the first, second, and third sprockets 202, 203, and 204, and is positioned inside the fixed frame 101. A chain 207 passes through the fixed frame 101 and extends to one side of the other sprockets, connecting all the sprockets via the chain 207. In the retracted state, the length of the chain 207 between the third and fourth sprockets 204, 205 is shortened, and the length of the chain 207 between the fifth sprocket 206 and the first sprocket 202 is lengthened. The opposite is true in the deployed state. The chains and sprockets are used to deploy or retract the three-section extension frame. Compared to existing lead screws, this method has the advantage of enabling step-by-step lifting. The first extension frame 102 is not extended until the second extension frame 103 is fully extended. In a shorter pipe, the second extension frame 103 does not extend or extends alone, and the deployed second support legs 307 can provide support. In a longer pipe, the second and first extension frames 103, 102 can be fully extended and supported by two sets of support legs.

[0029] Specifically, the leg assembly 3 includes a storage rack 301, which moves inside the fixed frame 101, and the front end of the storage rack 301 is hinged with a first hinged short axis 302, and a first support leg 303 is provided on one side of the first hinged short axis 302, and the side of the first hinged short axis 302 away from the first support leg 303 is connected to a hinged long axis 304, one end of the hinged long axis 304 is hinged with a second hinged short axis 305, and the second hinged short axis 305 is located at the rear end of the storage rack 301 and hinged thereto, a spring 306 is provided in the middle position of the storage rack 301, and the other end of the spring 306 is located on the front side of the hinge at the second hinged short axis 305 and the hinged long axis 304.

[0030] In this embodiment, the leg assembly 3 does not require additional starting elements. It will automatically unfold as the first extension frame 102 extends, and when the first extension frame 102 is stored, it will also automatically retract into the interior of the fixed frame 101. The first leg 303 and the first hinged short shaft 302 are formed as one piece, and the middle position is hinged to the end of the storage frame 301. The spring 306 is stored in the fixed frame 101 in a compressed state. When the second hinged short shaft 305 is exposed from the notch groove 105, the spring 306 will restore its deformation and expand, thereby driving the second hinged short shaft 305 to rotate, thereby driving the hinged long shaft 304 to rotate, and the hinged long shaft 304 then drives the first hinged short shaft 302 and the first leg 303 to rotate and unfold.

[0031] Specifically, a limiting block is provided on the outside of the storage rack 301, a limiting groove matching it is opened inside the fixing frame 101, and a second support leg 307 is installed on the outside of the fixing frame 101, a notch groove 105 is opened at the top of the fixing frame 101, and a limiting nail is installed inside the fixing frame 101, a connecting block is provided in the first extension frame 102, and the connecting block is connected to the storage rack 301.

[0032] In this embodiment, a non-slip rubber sheet can be added to the bottom of the second leg 307 of the first leg 303, which can better play a supporting role, enhance the friction with the inner wall of the pipe, and enhance the support stability. The first leg 303 and the second leg 307 are set to a double-leg structure, which can better support the device. The limiting structure in the fixing frame 101 and the storage rack 301 can make the storage rack 301 better move and store in the fixing frame 101.

[0033] See also Figure 7-Figure 8 , a tool for measuring the internal leakage of a ball valve for a natural gas pipeline, a folding component 4 is provided at the top end of the second extension frame 103.

[0034] In this embodiment, the folding component 4 is arranged below the detection component 5. The purpose is to allow the unfolded folding component 4 to keep the wind cup group 513 from tilting, and the wind cup group 513 is oriented correctly and faces the ball valve directly when entering the pipeline. Therefore, the folding component 4 can enter the pipeline in the unfolded state, or it can enter the pipeline in the folded state. When the wind cup group 513 is sent to one side of the ball valve, the telescopic shaft 401 can be controlled to contract, and the folding component 4 can be folded and stored as a whole. In this way, the second triangular plate 406 and the first triangular plate 405 after storage will not affect the rotation of the wind cup group 513.

[0035] Specifically, the folding component 4 includes a telescopic shaft 401 and a fixed column 402, and the fixed column 402 is located at the top of the second extension frame 103, the telescopic shaft 401 is installed on one side of the second extension frame 103, and the top of the telescopic shaft 401 is connected to a sleeve 403, the sleeve 403 is sleeved on the outside of the fixed column 402, and the outside of the sleeve 403 is equidistantly hinged with an inclined hinge shaft 404, and a first triangular plate 405 and a second triangular plate 406 are arranged above the inclined hinge shaft 404, and the number of the first triangular plate 405 and the second triangular plate 406 is four groups, and the four groups of first triangular plates 405 and second triangular plates 406 are distributed in a rectangular shape.

[0036] In this embodiment, a gap is provided between the first triangular plate 405 and the second triangular plate 406, and gaps are also provided between the adjacent first triangular plate 405 and the first triangular plate 405, the second triangular plate 406 and the second triangular plate 406. The gaps are filled with hinges 407 or rotating shafts. In actual use, the setting position of the wind cup group 513 at the top is avoided as much as possible from the rotating shaft or hinge 407, so that the first triangular plate 405 or the second triangular plate 406 is in contact with it, so that the use effect of the wind cup group 513 can be better.

[0037] Specifically, a hinge 407 is provided between the first triangular plate 405 and the second triangular plate 406, a connecting shaft 408 is connected to one side of the hinge 407, and the end of the connecting shaft 408 is hinged with a cross 409, and a rotating shaft is provided between the two adjacent groups of first triangular plates 405, and the rotating shaft is hinged to the end of the inclined hinge shaft 404.

[0038] In this embodiment, when the telescopic shaft 401 drives the sleeve 403 to move, some vibration may be caused, so it is necessary to wait for a period of time until the wind cup group 513 is stable before testing.

[0039] See also Figure 9-10 A tool for measuring the internal leakage of a ball valve for a natural gas pipeline. A detection component 5 is installed at the top of the folding component 4. The detection component 5 includes a fixed ring 503, and the fixed ring 503 is penetrated by equidistantly arranged extension shafts 510. The extension shafts 510 move inside the fixed ring 503, and one end of the extension shaft 510 is connected to an arc block 512. A wind cup group 513 that rotates with the wind is arranged inside the arc block 512. A miniature camera 514 is installed in the middle position of one side of the fixed ring 503.

[0040] In this embodiment, the detection component 5 is used to detect the specific location of the ball valve leakage point. In addition, the status of the ball valve can be observed through the micro camera 514. When obtaining flow data, the wind speed is measured by the wind cup. Combined with parameters such as the pipe cross-sectional area, the wind speed is converted into an air volume value using specific algorithms and formulas. The integrated signal processing circuit and display module directly display the measured air volume data, or a flow meter can be separately installed on the detection component 5 for detection. The specific detection method can be determined according to actual usage.

[0041] Specifically, the detection component 5 includes a top cover plate 501, and a plurality of straight grooves 502 are equidistantly provided on the top cover plate 501. The top cover plate 501 is installed on the top of the fixed ring 503, and a rotating plate 504 is provided inside the fixed ring 503. A plurality of rotating grooves 505 are equidistantly provided on the rotating plate 504, and an extension shaft 510 is provided between the rotating plate 504 and the top cover plate 501. The upper and lower parts of the extension shaft 510 are connected to limit blocks 511, and the upper limit block 511 is located inside the straight groove 502 and moves, and the lower limit block 511 is located inside the rotating groove 505 and moves.

[0042] In this embodiment, multiple groups of rotating grooves 505 are distributed in a spiral shape in the rotating plate 504. When the rotating plate 504 rotates, it will drive the lower limit block 511 to move. The upper limit block 511 is located inside the straight groove 502, so it will limit the movement of the extension shaft 510, and the extension shaft 510 will move in a diffuse shape outside the fixed ring 503. Therefore, multiple groups of arc blocks 512 will "expand" or "contract" outside the fixed ring 503. When expanding, the multiple groups of wind cup groups 513 will be diffused, and the circumference surrounded by the wind cup groups 513 will be larger. When contracting, the state will be opposite, and it can be adjusted according to the size of the ball valve.

[0043] Specifically, a bottom cover plate 506 is provided below the inside of the fixing ring 503, and a plurality of groups of internal teeth 507 are provided on the inner wall of the bottom cover plate 506. A driving motor 508 is installed inside the bottom cover plate 506, and the output end of the driving motor 508 is connected to a gear 509, and the gear 509 is meshed with the internal teeth 507.

[0044] In this embodiment, the bottom cover plate 506 includes an upper half and a lower half, the upper half and the lower half are rotatably connected, and the lower half is fixed for installing a drive motor 508. The internal teeth 507 are arranged in the upper half, which can drive the rotating plate 504 to rotate. The rotating plate 504 rotates inside the fixed ring 503, and the fixed ring 503 is fixed. A plurality of grooves are arranged at equal intervals in the fixed ring 503, and the extension shaft 510 passes through it.

[0045] When in use, it is necessary to connect an external power supply, which provides electrical energy for the device so that the device can operate normally. First, place the device from one end of the pipeline, rotate the second leg 307 on one side of the fixed frame 101, so that the second leg 307 supports the extension mechanism 1 in the pipeline, and then start the motor 201, so that the motor 201 drives the first sprocket 202 to rotate, and the first sprocket 202 drives the second sprocket 203, the third sprocket 204, the fourth sprocket 205 and the fifth sprocket 206 to rotate through the chain 207. The locking block 106 inside the second extension frame 103 locks the chain 207 on one side, so that when the chain 207 moves, it drives the second extension frame 103 to extend. When the second extension frame 103 is fully extended, the locking block 106 moves to the side of the fourth sprocket 205, and The fourth sprocket 205 is driven to extend together. The fourth sprocket 205 and the fifth sprocket 206 are installed on the first extension frame 102, so the first extension frame 102 is driven to extend from one side of the fixed frame 101. The chain length between the third sprocket 204 and the fourth sprocket 205 becomes longer, and the chain length between the fifth sprocket 206 and the first sprocket 202 becomes shorter. When the first extension frame 102 is extended from the inside of the fixed frame 101, the storage rack 301 is driven to extend from the inside of the fixed frame 101. When the second hinged short shaft 305 passes through the notch groove 105, it will unfold under the action of the spring 306 due to the loss of obstruction, thereby driving the first hinged short shaft 302 and the first leg 303 to unfold through the hinged long shaft 304, so that the first leg 303 stands inside the pipe as a supporting leg; Start the telescopic shaft 401, so that the telescopic shaft 401 drives the sleeve 403 to move upward on the outside of the fixed column 402, thereby using the inclined hinge shaft 404 to support multiple groups of first triangular plates 405 and second triangular plates 406, and with the cooperation of the connecting shaft 408, multiple groups of first triangular plates 405 and second triangular plates 406 are transformed from the storage state to the expanded state. The flat structure allows the wind cup group 513 to be placed flat, facing the position of the ball valve, and the size of the ball valve is observed through the micro camera 514, and then the drive motor 508 is controlled to start, and the drive motor 508 drives the gear 509 to rotate, and then drives the upper half of the bottom cover plate 506 to rotate through the relationship of meshing with the internal teeth 507, thereby driving the rotating plate 504 to rotate. Due to the extension shaft 510 below The limit block 511 is limited by the rotating groove 505, and the limit block 511 above the extension shaft 510 is limited by the straight groove 502. Therefore, when the rotating plate 504 rotates and the top cover plate 501 does not rotate, the limit block 511 will move along the set trajectory of the straight groove 502 and expand outward, causing multiple groups of arc blocks 512 to move outward synchronously until the wind cup group 513 is moved to the position of the ball valve sealing point. After the position is adjusted, the telescopic shaft 401 can be started to re-store the multiple groups of second triangular plates 406 and the first triangular plates 405, and then the detection can be started. The wind cup group 513 is annularly arranged on the outside of the ball valve sealing point. No matter which direction the sealing leakage is, it will be directly reflected to the corresponding wind cup group 513, and then reflected to the display system, making it convenient to find the leakage point.

[0046] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present application. The scope of this application is defined by the appended claims and their equivalents.

Claims

1. A tool for measuring the internal leakage of a ball valve for a natural gas pipeline, comprising an extension mechanism (1), characterized in that: The extension mechanism (1) comprises a retractable fixed frame (101), a first extension frame (102) and a second extension frame (103), and a chain assembly (2) is installed inside the extension mechanism (1), a leg assembly (3) is installed inside the fixed frame (101) and is unfolded as the first extension frame (102) extends, a folding assembly (4) is provided at the top end of the second extension frame (103), and a detection assembly (5) is installed at the top end of the folding assembly (4); The chain assembly (2) includes a plurality of sprockets and chains (207) meshed with the sprockets, including a first sprocket (202) arranged at the top of the interior of the fixed frame (101), a second sprocket (203) arranged vertically below the first sprocket (202), a third sprocket (204) located in the horizontal direction of the second sprocket (203), a fourth sprocket (205) located vertically above the third sprocket (204), and a fifth sprocket (206) located below the interior of the first extension frame (102), wherein the fourth sprocket (205) is located above the interior of the first extension frame (102), a locking block (106) is installed inside the second extension frame (103), and the locking block (106) is located outside the chain (207) on one side of the fourth sprocket (205); The detection assembly (5) comprises a fixed ring (503), and the fixed ring (503) is penetrated by an equidistantly arranged extension shaft (510), the extension shaft (510) moves inside the fixed ring (503), and one end of the extension shaft (510) is connected to an arc block (512), and a wind cup group (513) that rotates with the wind is arranged inside the arc block (512), and a micro camera (514) is installed at a middle position on one side of the fixed ring (503).

2. A tool for measuring internal leakage of a ball valve for a natural gas pipeline according to claim 1, characterized in that: A telescopic track (104) is provided between the fixed frame (101) and the first extension frame (102), and a telescopic track (104) is provided between the first extension frame (102) and the second extension frame (103). The fixed frame (101) is an inverted "7"-shaped structure.

3. The tool for measuring internal leakage of a ball valve for a natural gas pipeline according to claim 1, characterized in that: The chain assembly (2) further comprises a motor (201), and the motor (201) is located at the rear side of the first sprocket (202). The motor (201), the first sprocket (202), the second sprocket (203) and the third sprocket (204) are all located inside the fixed frame (101). The chain (207) passes through the fixed frame (101) and extends to the inside of the first extension frame (102).

4. A tool for measuring internal leakage of a ball valve for a natural gas pipeline according to claim 1, characterized in that: The leg assembly (3) comprises a storage rack (301), the storage rack (301) moves inside the fixed rack (101), and the front end of the storage rack (301) is hinged with a first hinged short shaft (302), a first leg (303) is provided on one side of the first hinged short shaft (302), and a hinged long shaft (304) is connected to the side of the first hinged short shaft (302) away from the first leg (303), one end of the hinged long shaft (304) is hinged with a second hinged short shaft (305), and the second hinged short shaft (305) is located at the rear end of the storage rack (301) and hinged thereto, and a spring (306) is provided at a middle position of the storage rack (301), and the other end of the spring (306) is located at the front side of the hinged joint between the second hinged short shaft (305) and the hinged long shaft (304).

5. A tool for measuring internal leakage of a ball valve for a natural gas pipeline according to claim 4, characterized in that: A limiting block is provided on the outside of the storage rack (301), a limiting groove matching the limiting groove is provided inside the fixing rack (101), and a second leg (307) is installed on the outside of the fixing rack (101), a notch groove (105) is provided on the top of the fixing rack (101), and a limiting pin is installed inside the fixing rack (101), and a connecting block is provided in the first extension rack (102), and the connecting block is connected to the storage rack (301).

6. A tool for measuring internal leakage of a ball valve for a natural gas pipeline according to claim 1, characterized in that: The folding assembly (4) comprises a telescopic shaft (401) and a fixed column (402), wherein the fixed column (402) is located at the top end of the second extension frame (103), the telescopic shaft (401) is mounted on one side of the second extension frame (103), and the top end of the telescopic shaft (401) is connected to a sleeve (403), wherein the sleeve (403) is sleeved on the outside of the fixed column (402), and an inclined hinge shaft (404) is equidistantly hinged on the outside of the sleeve (403), and a first triangular plate (405) and a second triangular plate (406) are arranged above the inclined hinge shaft (404), and the number of the first triangular plate (405) and the second triangular plate (406) is four groups, and the four groups of the first triangular plates (405) and the second triangular plates (406) are distributed in a rectangular shape.

7. A tool for measuring internal leakage of a ball valve for a natural gas pipeline according to claim 6, characterized in that: A hinge (407) is provided between the first triangular plate (405) and the second triangular plate (406), one side of the hinge (407) is connected to a connecting shaft (408), and the end of the connecting shaft (408) is hinged to a cross (409), and a rotating shaft is provided between two adjacent groups of first triangular plates (405), and the rotating shaft is hinged to the end of the inclined hinge shaft (404).

8. The tool for measuring internal leakage of a ball valve for a natural gas pipeline according to claim 1, characterized in that: The detection assembly (5) includes a top cover plate (501), and the top cover plate (501) is provided with a plurality of straight grooves (502) at equal intervals. The top cover plate (501) is mounted on the top of a fixed ring (503), and a rotating plate (504) is provided inside the fixed ring (503). The rotating plate (504) is provided with a plurality of rotating grooves (505) at equal intervals, and an extension shaft (510) is provided between the rotating plate (504) and the top cover plate (501). The upper and lower parts of the extension shaft (510) are both connected to limit blocks (511), and the upper limit block (511) is located inside the straight groove (502) and moves, while the lower limit block (511) is located inside the rotating groove (505) and moves.

9. A tool for measuring internal leakage of a ball valve for a natural gas pipeline according to claim 8, characterized in that: A bottom cover plate (506) is provided below the interior of the fixing ring (503), and a plurality of groups of internal teeth (507) are provided on the inner wall of the bottom cover plate (506). A driving motor (508) is installed inside the bottom cover plate (506), and a gear (509) is connected to the output end of the driving motor (508), and the gear (509) is meshed with the internal teeth (507).

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