Pipeline leakage detection device with adjusting function and implementation method

Abstract

The invention relates to the technical field of chemical pipelines, and discloses a pipeline leak detection device with an adjusting function and an implementation method. The device comprises an upper frame body, a lower frame body and a CCD camera, the upper frame body and the lower frame body are each of a semi-ring structure, the upper frame body and the lower frame body are connected on the outer side of a pipeline through a quick release mechanism to form a ring shape, and under the cooperation of a driving mechanism and an obstacle crossing mechanism, the leakage detection device is driven to move on the pipeline; the rotation driving mechanism drives the CCD camera to rotate around the pipeline so as to comprehensively photograph the pipeline; an electric push rod on the obstacle crossing mechanism is used for controlling contact and separation of moving wheels and the pipeline, alternate supporting is achieved, and flange crossing operation is completed; the distance between the upper frame body and the pipeline and the distance between the lower frame body and the pipeline are adjusted, so that the pipeline is located in the center of the leak detection device. The leak detection device automatically moves and automatically crosses obstacles, a CCD camera does not need to be held by a hand for photographing and leak detection, the workload of pipeline leak detection is reduced, the efficiency of pipeline leak detection is improved, the leak detection device is suitable for different pipe diameters, and the applicability of the leak detection device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline detection, and in particular to a pipeline leakage detection device with an adjustment function and an implementation method thereof. Background Art

[0002] Chemical pipelines are pipeline systems specially used to transport various chemical raw materials, intermediates, products, auxiliary materials and other fluids. It can ensure the safe and efficient transmission of fluids such as gas, liquid or solid particles in the chemical production process. It is an indispensable and important part of chemical production and plays a very critical role. However, after a long period of use, the pipeline may leak due to its own aging or corrosion. In order to avoid waste of resources and production safety hazards caused by leakage, chemical pipelines need to be inspected for leakage.

[0003] When checking for leakage in chemical pipelines in actual production, there are usually the following problems:

[0004] 1. The staff uses a handheld CCD camera to take photos for leak detection. The photos are taken at different distances and angles, and the photos are not comprehensive, which may easily lead to missed detection.

[0005] 2. When using semi-automatic leak detection, the flange at the pipeline connection will block the leak detection device, so it is necessary to manually dismantle the leak detection device across the flange and move it to the next section of the chemical pipeline. This method has a large workload and low leak detection efficiency.

[0006] Chinese invention patent application CN118149287A (publication date: June 7, 2024) discloses a leak detection device for a chemical pipeline, and proposes the following scheme: including a clamping component, a temperature measuring component and a clearing component. The side of the clamping component is fixedly connected with a temperature measuring component, and the side of the temperature measuring component is fixedly connected with a clearing component. The temperature measuring component cleans the dust on the surface of the pipeline and then measures the temperature on its surface to detect the temperature abnormality to locate the leak. The clearing component cleans the impurities on the surface of the pipeline in advance to prepare the road for the device. The above invention relates to the field of non-destructive testing technology. When it is necessary to automatically check the leak of the pipeline, the leak detection device of the chemical pipeline is installed on the surface of the pipeline through the clamping component. The clamping component can automatically adjust the clamping distance according to the diameter of the pipeline to adapt to pipelines of various sizes. At the same time, the clamping component provides power for the device to walk on the surface of the pipeline, driving the device to walk on the surface of the pipeline to be tested. When walking, the clearing component will shovel away the impurities with resistance adhering to the surface of the pipeline, so that the device can walk more smoothly.

[0007] Chinese utility model patent CN213656329U (publication date: July 9, 2021) discloses a mobile chemical pipeline leak detection device, including a pipe clamp and a moving assembly. The detection head is directly installed on the inner side of the pipe clamp, and the pipe clamp can keep the detection head moving quickly at a fixed distance from the pipe, and when passing through the flange, the front end pin is squeezed by the flange, so that the pin drives the card block to move downward, thereby causing the card to disengage from the card slot, so that the roller will be squeezed by the flange and rotated backward, allowing the roller to pass through the flange smoothly. After that, the roller rotates forward due to the torsion of the torsion spring, and the pin will be squeezed back into place by the spring, so that the card will be re-stuck in the card slot, thereby fixing the roller, and the gap between the two pipe clamps allows the device to pass through the fixed frame of the pipeline, solving the problem that the existing chemical pipeline leak detection device not only wastes time but also has low detection accuracy.

[0008] The above-mentioned prior art can solve the problem of horizontal movement of the leak detection device on the pipeline to a certain extent, and use the spring expansion principle to cross the flange. However, when the diameter of the pipeline to be leaked changes greatly, its adaptability is poor; and as the device is used for a longer time, the flexibility and stability of the spring facility will also decrease day by day, so the durability and leak detection efficiency of the device are bound to be greatly reduced. The leak detection device in the prior art has uneven shooting distance and incomplete photography, which makes it easy to miss detection; the leak detection device has low adaptability for connecting pipelines of different diameters; the leak detection device cannot cross obstacles when facing the pipeline flange; the large workload and low efficiency of leak detection are still very prominent in pipeline leak detection. Summary of the invention

[0009] In view of the above problems, the present invention provides the following technical solutions:

[0010] A pipeline leak detection device with an adjustment function comprises an upper frame, a lower frame and a CCD camera. Both the upper frame and the lower frame are semi-annular structures.

[0011] The upper frame body comprises an upper assembly frame 2 and two upper assembly frames 1, wherein the two upper assembly frames 1 are arranged on both sides of the upper assembly frame 2. Both sides of the upper assembly frame 2 are fixedly connected with a plurality of upper assembly rods, and the upper assembly frame 1 is detachably connected to the upper assembly rod 2 by bolts.

[0012] The lower frame body includes a lower assembly frame 2 and two lower assembly frames 1, the two lower assembly frames 1 are arranged on both sides of the lower assembly frame 2, both sides of the lower assembly frame 2 are fixedly connected with a plurality of lower assembly rods, and the lower assembly frame 1 is detachably connected to the lower assembly rods by bolts.

[0013] Furthermore, both ends of the upper frame are provided with obstacle crossing mechanism 1 and obstacle crossing mechanism 2 which enable the upper frame and the lower frame to move and cross the flange.

[0014] Furthermore, the upper frame and the lower frame are connected by a quick release mechanism, so that the upper frame and the lower frame are assembled in a ring shape on the outside of the pipeline, the upper assembly frame contacts the pipeline as a support, and a gap is left between the lower frame and the pipeline. A rotating drive mechanism is provided at both ends of the upper frame and the lower frame to drive the CCD camera to move in a ring outside the pipeline.

[0015] Furthermore, the quick release mechanism includes a plurality of side hooks, which are arranged at both ends of the two lower assembly frames 1; both ends of the two upper assembly frames 1 are provided with side hanging grooves, and the side hooks are engaged with the side hanging grooves. The outer sides of the ends of the upper assembly frames 2 are rotatably connected with a flip plate through a bearing seat, and one side of the flip plate has an integrally formed clamping column; the outer sides of the ends of the lower assembly frames 2 are provided with a clamping groove, and the clamping column is engaged with the clamping groove.

[0016] Furthermore, the obstacle crossing mechanism 1 and the obstacle crossing mechanism 2 both include a plurality of vertical tracks, and the plurality of vertical tracks are respectively fixedly connected to the two sides of the two upper assembly frames 1. The two vertical tracks on the same side are slidably connected to a slide through a slider, one side of the slide is fixedly connected to two support frames, the bottom ends of the support frames are rotatably connected to moving wheels, and both sides of the two upper assembly frames 1 are fixedly connected to electric push rods at the center, and one end of the telescopic part of the electric push rod is fixedly connected to the slide. Both sides of the obstacle crossing mechanism 2 are provided with a driving mechanism for driving the moving wheels to rotate.

[0017] Furthermore, the driving mechanism includes two side brackets, which are respectively fixedly connected to opposite sides of the two support frames. A driving motor is fixed to one side of the two side brackets through a motor base, and one end of the output shaft of the driving motor is fixed to the moving wheel through a flange coupling.

[0018] Furthermore, the rotary drive mechanism includes a plurality of annular rod mounting frames, which are respectively fixedly connected to the outer sides of the upper assembly frame 1 and the upper assembly frame 2, and the lower assembly frame 1 and the lower assembly frame 2. A semi-annular rod is fixedly connected to one side of each of the plurality of annular rod mounting frames, and the semi-annular rods of the upper frame and the lower frame are aligned vertically; an arc-shaped guide cylinder is sleeved on the outer side of the semi-annular rod, and a side avoidance groove is opened on one side of the semi-annular rod, and the annular rod mounting frame passes through the side avoidance groove; two adjacent arc-shaped guide cylinders are fixedly connected to the top plate at the top, and the CCD camera is fixedly connected to the bottom of the top plate; a servo motor is fixed to the top of the top plate through a motor base, and one end of the output shaft of the servo motor is keyed to a driving gear.

[0019] Furthermore, the outer sides of the upper assembly frame 2 and the lower assembly frame 2 are fixedly connected with two annular rack mounting frames aligned vertically, and the outer sides thereof are fixedly connected with semi-annular racks, the semi-annular racks of the upper frame body and the lower frame body are aligned vertically, and the driving gear is meshed with the semi-annular racks.

[0020] Furthermore, both ends of the multiple semi-annular rods of the upper frame are provided with rod stabilizing holes, and both ends of the multiple semi-annular rods of the lower frame are provided with sliding holes, a rod stabilizing column is slidably connected in the sliding hole, and the rod stabilizing column is plugged into the rod stabilizing hole, a spring is provided in the sliding hole, and both ends of the spring are respectively fixed to the rod stabilizing hole and the semi-annular rod.

[0021] Furthermore, rack stabilizing holes are provided at both end ends of the two semi-annular racks of the upper frame, and sliding openings are provided at both end ends of the two semi-annular racks of the lower frame, in which a rack stabilizing column is slidably connected, and the rack stabilizing column is plugged into the rack stabilizing hole, and a compression spring is provided in the sliding opening, and the two ends of the compression spring are respectively fixed to the rack stabilizing column and the semi-annular rack.

[0022] Furthermore, the outer side of the protruding sliding hole of the rod stabilizing column and the outer side of the protruding sliding opening of the rack stabilizing column are both hemispherical.

[0023] Furthermore, a counterweight frame is fixedly connected to the bottom of the lower frame for making the center of gravity of the lower frame face downward. During the movement of the pipeline leak detection device, the counterweight frame will make the center of gravity of the lower frame always face downward, thereby avoiding the position shift relative to the pipeline during the movement, and ensuring that the upper frame and the lower frame move horizontally along the axis of the pipeline.

[0024] Compared with the prior art, the present invention has the following technical effects:

[0025] (1) The upper and lower frames are connected to form a ring shape on the outside of the pipeline through a quick-release mechanism, which is stable and reliable while being easy to install and disassemble;

[0026] (2) The driving mechanism cooperates with the obstacle-crossing mechanism to realize the autonomous movement of the leak detection device on the pipeline, greatly saving labor costs;

[0027] (3) The rotary drive mechanism drives the CCD camera to rotate around the pipeline, achieving 360° photography of the pipeline, making leak detection more comprehensive;

[0028] (4) By controlling the contact and separation between the moving wheels on the obstacle crossing mechanism and the pipeline, multiple sets of moving wheels are alternately supported on the pipeline, and the driving mechanism drives the device to move forward to complete the operation of crossing the flange;

[0029] (5) The distance between the upper frame, the lower frame and the pipeline is adjusted by extending and retracting the electric push rod, so that the pipeline is always located in the center of the leak detection device. It is used for leak detection of pipes with different diameters, and its applicability is greatly enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly describe the technical solutions of the present invention and the embodiments, the following briefly describes the drawings required for describing the embodiments of the present invention. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0031] Figure 1 It is a three-dimensional structural schematic diagram of a pipeline leak detection device with an adjustment function in use;

[0032] Figure 2 It is a structural schematic diagram of a pipeline leak detection device with an adjustment function;

[0033] Figure 3 It is a structural schematic diagram of an upper frame of a pipeline leak detection device with an adjustment function;

[0034] Figure 4 It is a structural schematic diagram of a quick-release mechanism of a pipeline leak detection device with an adjustment function;

[0035] Figure 5 It is a partially enlarged structural schematic diagram of an obstacle-crossing mechanism of a pipeline leak detection device with an adjustment function;

[0036] Figure 6 It is a partially enlarged structural schematic diagram of a rotary drive mechanism of a pipeline leak detection device with an adjustment function;

[0037] Figure 7 A pipeline leak detection device with adjustment function Figure 6 Schematic diagram of the enlarged structure of part A.

[0038] Figure numerals: 1, upper frame; 101, upper assembly frame 1; 102, upper assembly rod; 103, upper assembly frame 2; 2, lower frame; 201, lower assembly frame 1; 202, lower assembly rod; 203, lower assembly frame 2; 3, obstacle crossing mechanism 1; 4, obstacle crossing mechanism 2; 401, vertical track; 402, slide; 403, electric push rod; 404, support frame; 405, moving wheel; 5, CCD camera; 6, rotation drive mechanism; 601, semi-annular rack; 602, semi-annular Rod; 603, annular rod mounting frame; 604, annular rack mounting frame; 605, top plate; 606, arc-shaped guide cylinder; 607, side avoidance groove; 608, servo motor; 609, driving gear; 7, quick release mechanism; 701, side hook; 702, side hanging groove; 703, flip plate; 704, clamping column; 705, clamping groove; 8, rod stabilizing column; 9, rack stabilizing column; 10, counterweight frame; 11, rod stabilizing hole; 12, rack stabilizing hole; 13, side bracket; 14, driving motor. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. 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.

[0040] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] Example 1

[0043] This embodiment introduces a pipeline leak detection device with an adjustment function, including an upper frame 1, a lower frame 2 and a CCD camera 5. The upper frame 1 and the lower frame 2 are both semi-ring structures. Figure 2 .

[0044] The upper frame body 1 includes an upper assembly frame 2 103 and two upper assembly frames 101, and its schematic diagram is shown in Figure 3 The two upper assembly frames 101 are arranged on both sides of the upper assembly frame 103. A plurality of upper assembly rods 102 are welded on both sides of the upper assembly frame 103, and the upper assembly frame 101 is detachably connected to the upper assembly rod 102 by bolts.

[0045] The lower frame 2 includes a lower assembly frame 203 and two lower assembly frames 1 201. The two lower assembly frames 1 201 are arranged on both sides of the lower assembly frame 203. Both sides of the lower assembly frame 203 are welded with a plurality of lower assembly rods 202, and the lower assembly frame 1 201 is detachably connected to the lower assembly rods 202 by bolts.

[0046] Furthermore, both ends of the upper frame 1 are provided with an obstacle crossing mechanism 1 3 and an obstacle crossing mechanism 2 4 for enabling the upper frame 1 and the lower frame 2 to move and cross the flange.

[0047] Furthermore, the upper frame 1 and the lower frame 2 are connected by a quick release mechanism 7. The exploded structure diagram of the quick release mechanism 7 is shown in FIG. Figure 4 The upper frame 1 and the lower frame 2 are assembled in a ring shape on the outside of the pipeline, the upper frame contacts the pipeline as a support, and a gap is left between the lower frame 2 and the pipeline. A rotating drive mechanism 6 is provided on the outside of the upper frame 1 and the lower frame 2 to drive the CCD camera 5 to move in a ring on the outside of the pipeline.

[0048] Furthermore, the quick-release mechanism 7 includes a plurality of side hooks 701, which are respectively fixedly connected to the two ends of the two lower assembly frames 201; both ends of the two upper assembly frames 101 are provided with side hanging grooves 702, and the side hooks 701 are clamped with the side hanging grooves 702; the outer sides of the ends of the upper assembly frames 103 are rotatably connected with a flip plate 703 through a bearing seat, and one side of the flip plate 703 has an integrally formed clamping column 704; the outer sides of the ends of the lower assembly frames 203 are provided with a clamping groove 705, and the clamping column 704 is clamped with the clamping groove 705.

[0049] The technical effect achieved by this embodiment is: through the setting of the quick-disassembly mechanism, it is convenient for the staff to assemble the upper frame and the lower frame on the outside of the pipeline, so as to realize the rapid disassembly and firm assembly of the leak detection device, thereby improving the convenience of using the leak detection device; in addition, through the setting of the obstacle-crossing mechanism, the leak detection device can autonomously cross the flange at the pipeline connection, thereby reducing the workload of pipeline leak detection.

[0050] Example 2

[0051] Based on Example 1, this example introduces an obstacle crossing mechanism of a pipeline leak detection device with an adjustment function, and its structural schematic diagram is shown in FIG. Figure 5 .

[0052] The obstacle surmounting mechanism 1 3 and the obstacle surmounting mechanism 2 4 both include a plurality of vertical rails 401, and the plurality of vertical rails 401 are respectively fixed on both sides of the two upper assembly frames 101 by bolts, and the two vertical rails 401 on the same side are slidably connected to a slide 402 through a slider, and one side of the slide 402 is respectively fixedly connected to two support frames 404 by bolts, and the bottom ends of the plurality of support frames 404 are rotatably connected to moving wheels 405, and electric push rods 403 are fixed at the center of both sides of the two upper assembly frames 101 by bolts, and one end of the telescopic part of the electric push rod 403 is fixed to the slide 402 by bolts.

[0053] Furthermore, both sides of the obstacle crossing mechanism 2 4 are provided with driving mechanisms for driving the moving wheels 405 to rotate.

[0054] Furthermore, the driving mechanism includes two side brackets 13, which are respectively fixed to opposite sides of two support frames 404 by bolts. A driving motor 14 is fixed to one side of the two side brackets 13 through a motor base, and one end of the output shaft of the driving motor 14 is fixed to the moving wheel 405 through a flange coupling.

[0055] During the movement of the upper frame 1 and the lower frame 2, the obstacle crossing mechanism 1 3 and the obstacle crossing mechanism 2 4 can enable the upper frame 1 and the lower frame 2 to cross the flange at the pipeline connection.

[0056] As an implementation mode, when the upper frame 1 is placed above the pipeline, the moving wheels 405 on the two obstacle crossing mechanisms 2 4 are in contact with the pipeline, while the moving wheels 405 on the two obstacle crossing mechanisms 1 3 are not in contact with the pipeline, so that the moving wheels 405 on the two obstacle crossing mechanisms 2 4 support the upper frame 1. The moving wheels 405 on the two obstacle crossing mechanisms 2 4 and the two obstacle crossing mechanisms 1 3 are operated alternately to achieve the purpose of crossing the flange.

[0057] The technical effect achieved by this embodiment is: by setting up the obstacle crossing mechanism 2, the distance between the upper frame 1 and the lower frame 2 and the pipeline is adjusted, so that the pipeline is located at the center of the upper frame 1 and the lower frame 2, thereby facilitating leak detection for pipelines of different diameters and improving the applicability of the leak detection device; the coordinated use of the obstacle crossing mechanism 1 3 and the obstacle crossing mechanism 2 4 can enable the leak detection device to pass over the flange of the pipeline connection, thereby eliminating the step of manual handling and reducing the workload of leak detection.

[0058] Example 3

[0059] Based on Example 1 or Example 2, this embodiment introduces a rotary drive mechanism of a pipeline leak detection device with an adjustment function, and its schematic diagram is shown in FIG. Figure 6 The local enlarged structure diagram is shown in Figure 7 , as follows:

[0060] The rotary drive mechanism 6 includes a plurality of annular rod mounting frames 603, which are respectively fixed to the outer sides of the upper assembly frame 101 and the upper assembly frame 2 103, and the lower assembly frame 1 201 and the lower assembly frame 2 203 by bolts. A semi-annular rod 602 is welded to one side of each of the plurality of annular rod mounting frames 603, and the semi-annular rods 602 of the upper frame body 1 and the lower frame body 2 are aligned vertically; an arc-shaped guide cylinder 606 is sleeved on the outer side of the semi-annular rod 602, and a side avoidance groove 607 is opened on one side thereof, and the annular rod mounting frame 603 passes through the side avoidance groove 607; a top plate 605 is welded to the top of two adjacent arc-shaped guide cylinders 606 located on the upper frame body, and a CCD camera 5 is fixed to the bottom of the top plate 605 by bolts, and a servo motor 608 is fixed to the top of the top plate through a motor base, and a driving gear 609 is keyed to one end of the output shaft of the servo motor 608.

[0061] Furthermore, the outer sides of the upper assembly frame 103 and the lower assembly frame 203 are fixedly connected with two annular rack mounting frames 604 aligned vertically, and the outer sides thereof are fixedly connected with semi-annular racks 601. The semi-annular racks 601 of the upper frame body 1 and the lower frame body 2 are aligned vertically, and the driving gear is meshed with the semi-annular racks 601.

[0062] Furthermore, both end ends of the two semi-annular racks 601 of the upper frame 1 are provided with rack stabilizing holes 12, and both end ends of the two semi-annular racks 601 of the lower frame 2 are provided with sliding openings, in which a rack stabilizing column 9 is slidably connected, and the rack stabilizing column 9 is plugged into the rack stabilizing hole 12; a compression spring is provided in the sliding opening, and both ends of the compression spring are respectively fixed to the rack stabilizing column 9 and the semi-annular rack 601.

[0063] The technical effect achieved by this embodiment is: through the rotary drive mechanism, the leak detection camera can rotate 360 ​​degrees around the inspection pipeline, which is particularly suitable for locations that are difficult for personnel to reach, and can achieve comprehensive leak detection of the pipeline.

[0064] Example 4

[0065] Based on Example 3, this example introduces a preferred solution of a pipeline leak detection device with an adjustment function, which is as follows:

[0066] Furthermore, both ends of the multiple semi-annular rods 602 of the upper frame 1 are provided with rod stabilizing holes 11, and both ends of the multiple semi-annular rods 602 of the lower frame 2 are provided with sliding holes, in which the sliding holes are slidably connected with rod stabilizing columns 8, and the rod stabilizing columns 8 are plugged into the rod stabilizing holes 11; a spring is provided in the sliding holes, and both ends of the spring are respectively fixed to the rod stabilizing holes 11 and the semi-annular rods 602.

[0067] Preferably, the outer side of the rod stabilizing column 8 protruding from the sliding hole and the outer side of the rack stabilizing column 9 protruding from the sliding opening are both hemispherical.

[0068] Furthermore, a counterweight frame 10 is fixed to the bottom of the lower frame 2 by bolts so that its center of gravity is facing downward. During the movement of the pipeline leak detection device, the counterweight frame 10 will make the center of gravity of the lower frame 2 always face downward, thereby avoiding displacement of the position relative to the pipeline during the movement, and ensuring that the upper frame 1 and the lower frame 2 move horizontally along the axis of the pipeline.

[0069] The technical effect achieved by this embodiment is: through the cooperation of the rod stabilizing column 8 and the rack stabilizing column 9, a reliable and stable connection is achieved when the upper frame 1 and the lower frame 2 are assembled; during the movement of the leak detection device, under the action of the counterweight frame, the center of gravity of the leak detection device is always downward, thereby avoiding the upper frame and the lower frame 2 from being offset during the movement, ensuring that the upper frame and the lower frame 2 move horizontally along the axis of the pipeline. Thereby ensuring that the CCD camera 5 moves smoothly in an annular shape, avoiding the CCD camera 5 from getting stuck during the movement, and allowing the CCD camera 5 to steadily shoot the pipeline.

[0070] Example 5

[0071] This embodiment, based on Embodiments 1 to 4, introduces an implementation method of a pipeline leak detection device with an adjustment function. The three-dimensional structural diagram of the device in use is shown in FIG. Figure 1 , the specific steps are as follows:

[0072] S1: Installation.

[0073] S2: Mobile photography.

[0074] After step S1 is completed, the drive motor 14 is started to rotate, and the drive motor 14 drives the moving wheel 405 on the obstacle crossing mechanism 2 4 to rotate. During the rotation process, the moving wheel 405 drives the upper frame 1 to move on the pipeline through the friction between the upper frame 1 and the lower frame 2. At the same time, the servo motor 608 is started, and the servo motor 608 drives the driving gear 609 to rotate.

[0075] Since the driving gear 609 is meshed with the semi-annular rack 601, and the two semi-annular racks 601 are combined to form a ring, the driving gear 609 will move along the semi-annular racks 601 that form the ring during the rotation process, driving the top plate 605 to move along the semi-annular rods 602 that form the ring through the arc-shaped guide cylinder 606, so that the top plate 605 drives the CCD camera 5 to move in a ring on the outside of the pipeline, so that the CCD camera 5 can take pictures of the outside of the pipeline for leak detection.

[0076] S3: Overcoming obstacles.

[0077] After step S2, when the upper frame 1 and the lower frame 2 move to the pipe connection flange, the obstacle crossing mechanism 3 at one end of the upper frame 1 will cross the flange, and then the electric push rod 403 on the obstacle crossing mechanism 3 that crosses the flange will be started to retract, and the electric push rod 403 will drive the slide 402 to move downward along the vertical track 401 through the slider, and the slide 402 will drive the support frame 404 to move downward, so that the moving wheel 405 on the obstacle crossing mechanism 3 will contact with the pipe for support;

[0078] Then, the electric push rod 403 on the obstacle-crossing mechanism 2 4 near the flange is started to extend, so that the moving wheel 405 on the obstacle-crossing mechanism 2 4 is out of contact with the pipeline. At this time, the moving wheel 405 on the obstacle-crossing mechanism 2 4 in contact with the pipeline can drive the upper frame 1 and the lower frame 2 to move, so that the moving wheel 405 on the obstacle-crossing mechanism 2 4 that is out of contact with the pipeline passes over the flange;

[0079] When the moving wheel 405 on the obstacle crossing mechanism 2 4 in contact with the pipeline moves to a position close to the flange, the moving wheel 405 on the obstacle crossing mechanism 2 4 detached from the pipeline is moved downward to contact the pipeline, and at the same time, the moving wheel 405 on the obstacle crossing mechanism 1 3 in contact with the pipeline is moved upward to break away from the contact with the pipeline, and then the moving wheel 405 on the obstacle crossing mechanism 2 4 in contact with the pipeline is moved upward to break away from the contact with the pipeline, and the moving wheel 405 on the obstacle crossing mechanism 1 3 detached from the pipeline is moved downward to contact the pipeline, and then the upper frame 1 and the lower frame 2 are driven to move by the moving wheel 405 on the obstacle crossing mechanism 2 4 in contact with the pipeline.

[0080] When the moving wheels 405 on the obstacle crossing mechanism 2 4 detached from the pipeline pass over the flange, the moving wheels 405 on the obstacle crossing mechanism 2 4 detached from the pipeline move downward to contact the pipeline, and the moving wheels 405 on the obstacle crossing mechanism 1 3 contacting the pipeline move upward to break away from the contact with the pipeline. At this time, the upper frame 1 and the lower frame 2 can be moved by the moving wheels 405 on the two obstacle crossing mechanisms 2 4, so that they can autonomously cross the flange at the pipeline connection.

[0081] S4: Pipe diameter switching.

[0082] When leak detection is performed on a pipe with a variable cross-section, the electric push rod 403 on the obstacle crossing mechanism 2 4 is started to extend or contract. At this time, the electric push rod 403 drives the slide 402 to move upward or downward along the vertical track 401 through the slider, so that the support frame 404 drives the moving wheel 405 to move upward or downward, and changes the position of the moving wheel 405. Therefore, when the moving wheel 405 contacts the pipe to support the upper frame 1, the distance between the upper frame 1 and the lower frame 2 and the pipe can be changed, so that the pipe is located at the center of gravity of the upper frame 1 and the lower frame 2, so as to facilitate leak detection for pipes with different diameters.

[0083] Furthermore, the step S1 includes:

[0084] S11: Place the upper frame 1 above the pipeline, and make the moving wheels 405 on the two obstacle crossing mechanisms 2 4 contact the pipeline, while the moving wheels 405 on the two obstacle crossing mechanisms 1 3 do not contact the pipeline, so that the moving wheels 405 on the two obstacle crossing mechanisms 2 4 support the upper frame 1.

[0085] S12: placing the lower frame 2 below the pipeline, so that the lower assembly rack 1 201 and the upper assembly rack 1 101 are in vertically staggered distribution, and the upper assembly rack 2 103 and the lower assembly rack 2 203 are in vertically staggered distribution.

[0086] S13: Push the lower frame 2 to move so that the side hook 701 on the lower assembly frame 201 is inserted into the side hanging groove 702 on the upper assembly frame 101. At this time, the upper assembly frame 101 will be aligned with the lower assembly frame 201, and the upper assembly frame 2 103 will be aligned with the lower assembly frame 203.

[0087] S14: Rotate the flip plate 703 to insert the clamping column 704 on the flip plate 703 into the clamping groove 705, thereby completing the assembly of the upper frame 1 and the lower frame 2, so that the upper frame 1 and the lower frame 2 are assembled in a ring shape on the outside of the pipeline.

[0088] S15: The semi-annular rod 602 and the semi-annular rack 601 on the upper frame 1 and the semi-annular rod 602 and the semi-annular rack 601 on the lower frame 2 are combined to form a ring. The semi-annular rod 602 on the upper frame 1 will squeeze the arc surface of the rod stabilizing column 8 to move the rod stabilizing column 8 into the sliding hole, thereby driving the spring to be squeezed; at the same time, the semi-annular rack 601 on the upper frame 1 will squeeze the arc surface of the rack stabilizing column 9 to move the rack stabilizing column 9 into the sliding hole to squeeze the compression spring.

[0089] When the semi-annular rod 602 and the semi-annular rack 601 are aligned up and down to form a ring, the rod stabilizing column 8 will be reset and moved by the force of the spring, so that the rod stabilizing column 8 is inserted into the rod stabilizing hole 11. At the same time, the rack stabilizing column 9 will be reset and moved by the force of the compression spring, so that the rack stabilizing column 9 is inserted into the rack stabilizing hole 12, thereby allowing the semi-annular rack 601 and the semi-annular rod 602 combined to form a ring to be positioned and stably assembled.

[0090] The technical effect achieved by this embodiment is: 360-degree automatic continuous photography leak detection for pipelines, which is suitable for pipelines with variable cross-sections and can autonomously overcome obstacles at flange connections, greatly saving labor costs and significantly improving leak detection efficiency.

[0091] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those skilled in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A pipeline leak detection device with an adjustment function, comprising an upper frame (1), a lower frame (2) and a CCD camera (5), characterized in that: The upper frame (1) and the lower frame (2) are both semi-annular structures; The upper frame body (1) comprises an upper assembly frame 2 (103) and two upper assembly frames 1 (101), wherein the two upper assembly frames 1 (101) are arranged on both sides of the upper assembly frame 2 (103); a plurality of upper assembly rods (102) are fixedly connected to both sides of the upper assembly frame 2 (103), and the upper assembly frame 1 (101) is detachably connected to the upper assembly rod 2 (102) by bolts; The lower frame body (2) comprises a lower assembly frame 2 (203) and two lower assembly frames 1 (201), the two lower assembly frames 1 (201) are arranged on both sides of the lower assembly frame 2 (203), both sides of the lower assembly frame 2 (203) are fixedly connected with a plurality of lower assembly rods (202), and the lower assembly frame 1 (201) is detachably connected to the lower assembly rod 2 (202) by bolts; The upper frame (1) and the lower frame (2) are connected via a quick-release mechanism (7), so that the upper frame (1) and the lower frame (2) are assembled in a ring shape on the outside of the pipeline, the upper frame contacts the pipeline as a support, and a gap is left between the lower frame (2) and the pipeline; the outer sides of the upper frame (1) and the lower frame (2) are provided with a rotating drive mechanism (6) for driving a CCD camera (5) to move in a ring on the outer side of the pipeline; both ends of the upper frame (1) are provided with an obstacle crossing mechanism (3) and an obstacle crossing mechanism (4) for moving the pipeline leak detection device and crossing the flange.

2. A pipeline leak detection device with adjustment function according to claim 1, characterized in that: The quick-release mechanism (7) comprises a plurality of side hooks (701), and the plurality of side hooks (701) are respectively fixedly connected to the two ends of the two lower assembly frames (201); Both ends of the two upper assembly frames (101) are provided with side hanging grooves (702), and the side hooks (701) are snap-connected with the side hanging grooves (702); the outer sides of the ends of the upper assembly frames (103) are rotatably connected with flip plates (703) through bearing seats, and one side of the flip plate (703) is integrally formed with a clamping column (704); the outer side of the lower assembly frame (203) is provided with a clamping groove (705) near the end, and the clamping column (704) is snap-connected with the clamping groove (705).

3. A pipeline leak detection device with adjustment function according to claim 1 or 2, characterized in that: The obstacle crossing mechanism 1 (3) and the obstacle crossing mechanism 2 (4) both comprise a plurality of vertical rails (401), and the plurality of vertical rails (401) are respectively fixedly connected to the two sides of the two upper assembly frames 1 (101); the outer sides of the two vertical rails (401) on the same side are slidably connected to a slide frame (402) via a slider, one side of the slide frame (402) is fixedly connected to two support frames (404), the bottom ends of the plurality of support frames (404) are rotatably connected to moving wheels (405), both sides of the two upper assembly frames 1 (101) are fixedly connected to electric push rods (403) at the center, and one end of the telescopic part of the electric push rod (403) is fixedly connected to the slide frame (402); both sides of the obstacle crossing mechanism 2 (4) are provided with a driving mechanism for driving the moving wheel (405) to rotate.

4. A pipeline leak detection device with adjustment function according to claim 3, characterized in that: The driving mechanism comprises two side brackets (13), the two side brackets (13) are respectively fixedly connected to opposite sides of two support frames (404), one side of the two side brackets (13) is fixed with a driving motor (14) through a motor base, and one end of the output shaft of the driving motor (14) is fixed to the moving wheel (405) through a flange coupling.

5. A pipeline leak detection device with adjustment function according to claim 1 or 2, characterized in that: The rotary drive mechanism (6) comprises a plurality of annular rod mounting frames (603) which are respectively fixedly connected to the outer sides of the upper assembly frame 1 (101) and the upper assembly frame 2 (103), and the lower assembly frame 1 (201) and the lower assembly frame 2 (203); one side of each of the plurality of annular rod mounting frames (603) is fixedly connected with a semi-annular rod (602), and the semi-annular rods (602) of the upper frame body (1) and the lower frame body (2) are aligned vertically; the outer sides of the semi-annular rods (602) are sleeved with arc A guide cylinder (606) is provided with a side avoidance groove (607) on one side, and the ring-shaped rod mounting frame (603) passes through the side avoidance groove (607); the tops of the two arc-shaped guide cylinders (606) adjacent to each other on the upper frame are fixedly connected with a top plate (605), the CCD camera (5) is fixedly connected to the bottom of the top plate (605), and a servo motor (608) is fixed to the top of the top plate (605) through a motor base, and one end of the output shaft of the servo motor (608) is key-connected with a driving gear (609); The outer sides of the upper assembly frame 2 (103) and the lower assembly frame 2 (203) are both fixedly connected with two annular rack mounting frames (604) aligned vertically, and the outer sides of the annular rack mounting frames (604) are fixedly connected with semi-annular racks (601), and the upper semi-annular racks (601) are aligned vertically with the lower semi-annular racks (601), and the driving gear (609) is meshed with the semi-annular racks (601).

6. A pipeline leak detection device with adjustment function according to claim 5, characterized in that: Both ends of the two semi-annular racks (601) of the upper frame are provided with rack stabilizing holes (12), and both ends of the two semi-annular racks (601) of the lower frame are provided with sliding openings, in which a rack stabilizing column (9) is slidably connected, and the rack stabilizing column (9) is plugged into the rack stabilizing hole (12), and a compression spring is provided in the sliding opening, and both ends of the compression spring are respectively fixed to the rack stabilizing column (9) and the semi-annular rack (601).

7. A pipeline leak detection device with adjustment function according to claim 6, characterized in that: Both ends of the multiple semi-annular rods (602) of the upper frame (1) are provided with rod stabilizing holes (11), and both ends of the multiple semi-annular rods (602) of the lower frame (2) are provided with sliding holes, and a rod stabilizing column (8) is slidably connected in the sliding hole, and the rod stabilizing column (8) is plugged into the rod stabilizing hole (11); a spring is provided in the sliding hole, and both ends of the spring are respectively fixed to the rod stabilizing hole (11) and the semi-annular rod (602); the outer side of the rod stabilizing column (8) protruding from the sliding hole and the outer side of the rack stabilizing column (9) protruding from the sliding mouth are both hemispherical.

8. A pipeline leak detection device with adjustment function according to claim 6 or 7, characterized in that: Both ends of the two semi-annular racks (601) of the upper frame are provided with rack stabilizing holes (12), and both ends of the two semi-annular racks (601) of the lower frame are provided with sliding openings, in which a rack stabilizing column (9) is slidably connected, and the rack stabilizing column (9) is plugged into the rack stabilizing hole (12), and a compression spring is provided in the sliding opening, and both ends of the compression spring are respectively fixed to the rack stabilizing column (9) and the semi-annular rack (601).

9. A pipeline leak detection device with an adjustment function according to any one of claims 1 or 2 or 4 or 6 or 7, characterized in that: The bottom of the lower frame (2) is fixedly connected to a counterweight frame (10) which directs the center of gravity of the lower frame (2) downward.

10. The implementation method of the pipeline leak detection device with adjustment function according to any one of claims 1 to 9, the steps comprising: S1: combined installation; The upper frame (1) and the lower frame (2) are supported and assembled by the moving wheel (405) of the obstacle crossing mechanism 2 (4); the lower frame (2) is aligned with the upper frame (1) by the side hook (701); the flip plate (703) completes the final assembly to form a ring structure; the semi-ring rod (602) and the semi-ring rack (601) are combined to form a ring shape, and the structural stability is achieved by squeezing the rack stabilizing column (9); S2: mobile photography; After step S1, the driving motor (14) is started to drive the moving wheel (405) on the obstacle crossing mechanism 2 (4) to rotate, driving the upper frame (1) to move on the pipeline, and the upper frame (1) drives the lower frame (2) to move; at the same time, the servo motor (608) is started to drive the driving gear (609) to rotate; The driving gear (609) is meshed with the semi-annular rack (601), so that it moves along the semi-annular rack (601) during the rotation process, driving the top plate (605) to move along the semi-annular rods (602) that form a ring through the arc-shaped guide cylinder (606), so that the top plate (605) drives the CCD camera (5) to move in a ring shape on the outside of the pipeline, and leak detection and photography are performed on the outside of the pipeline; S3: Obstacle crossing; After step S2, when encountering an obstacle, the obstacle-crossing mechanism 1 (3) and the obstacle-crossing mechanism 2 (4) work alternately, and the electric push rod (403) controls the contact and separation of the moving wheel (405) with the pipeline. Through the alternate support of the moving wheel (405), the movement of the upper frame (1) and the lower frame (2) is realized, and the operation of crossing the flange is completed; S4: pipe diameter switching; When the pipe diameter changes, the electric push rod (403) on the obstacle crossing mechanism (4) is started to extend or contract, driving the carriage (402) to move upward or downward along the vertical track (401) through the slider, so that the support frame (404) drives the moving wheel (405) to move up and down, changing the position of the moving wheel (405), so that when the moving wheel (405) contacts the pipe to support the upper frame (1), the distance between the upper frame (1) and the lower frame (2) and the pipe is changed, so that the pipe is located at the center of the upper frame (1) and the lower frame (2); In the step S1, when the semi-annular rod (602) and the semi-annular rack (601) are aligned up and down to form a ring, the stabilizing column (8) will be reset by the force of the spring, so that the rod stabilizing column (8) is inserted into the rod stabilizing hole (11), and at the same time, the rack stabilizing column (9) will be reset by the force of the compression spring, so that the rack stabilizing column (9) is inserted into the rack stabilizing hole (12), so that the semi-annular rack (601) and the semi-annular rod (602) combined to form a ring are positioned and stably assembled.

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