A pipeline measurement device for ultra-large diameter pipelines

Abstract

This utility model relates to a pipeline measurement device for ultra-large diameter pipelines, comprising: a support structure; rollers symmetrically arranged on the left and right sides of the support structure; a sensor mounted on the support structure for detecting the rolling angle of the rollers; two opposing rollers arranged at an angle; wherein, along the vertical direction, the upper ends of the two rollers are inclined in a direction that brings them closer together; a drag end is provided on the front side of the middle position of the support structure, and a docking connection end for connecting a pipeline surveying instrument is provided on the rear side of the middle position of the support structure. This design, through the two inclined rollers, makes the support of the pipeline measurement auxiliary device in the pipeline more stable, and makes it easier to keep the center of gravity of the entire pipeline measurement auxiliary device in the radial direction of the pipeline (such as the radial direction perpendicular to the ground), thereby making it easier for the pipeline measurement auxiliary device to maintain balance in the pipeline.

Description

Technical Field

[0001] This utility model relates to the field of pipeline measurement technology, and in particular to a pipeline measurement device for ultra-large diameter pipelines. Background Technology

[0002] In industrial production and various engineering construction projects, accurate pipeline measurement is a crucial step in ensuring project quality and safe operation. Among these methods, wheeled pipeline measurement auxiliary devices are widely used. These devices assist the measuring equipment in moving along the inner wall of the pipeline, thereby enabling precise measurement of various pipeline parameters.

[0003] Currently, most wheel sets on the market adopt a three-support wheel design. This structure does perform well in pipe measurement scenarios with general diameters, exhibiting a certain degree of stability and adaptability, and can assist the measuring equipment in completing measurement tasks relatively smoothly.

[0004] However, when faced with the measurement needs of ultra-large diameter pipes (600mm and above), the drawbacks of existing wheel sets gradually become apparent. On one hand, due to the large internal space of ultra-large diameter pipes, the weight of the three supporting wheels in the wheel set becomes significantly greater during ultra-large diameter measurements, making it difficult to accurately and evenly distribute the weight of the measuring equipment. When the measuring equipment is in certain positions, uneven pressure distribution on the wheel set, exceeding its load-bearing capacity, can easily lead to denting and collapse. Such collapse not only forces the measurement work to stop, affecting the measurement progress, but may also damage the measuring equipment, increasing maintenance and time costs. More seriously, if the wheel set suddenly collapses during measurement, it may cause a safety accident, threatening the safety of the operators.

[0005] On the other hand, to meet the requirements of large-diameter pipe surveying, existing wheelsets need to be larger and more complex in structure to ensure sufficient support and stability. This presents numerous challenges in the manufacturing process. For example, the manufacturing process becomes more complex, requiring higher precision and specifications from the processing equipment, which undoubtedly increases manufacturing costs. Moreover, in practical use, the large size and complex structure of large wheelsets make them difficult to operate, especially in field environments where assembly is more challenging. More significantly, the flexibility of large wheelsets decreases; both installation on pipes and movement within pipes require more manpower and resources, making operation extremely inconvenient. Furthermore, the transportation and storage of large wheelsets after use also present challenges, causing considerable inconvenience for users.

[0006] It is evident that existing wheel-type pipeline measurement auxiliary devices based on a three-support wheel structure are severely inadequate in terms of both structural stability and ease of processing and use when measuring ultra-large diameter pipes. There is an urgent need for a new pipeline measurement auxiliary device to solve these problems. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a pipeline measurement device for ultra-large diameter pipelines.

[0008] To achieve the above-mentioned utility model objectives, this utility model provides a pipeline measuring device for ultra-large diameter pipelines, comprising: a support structure, rollers symmetrically arranged on the left and right sides of the support structure, and a sensor mounted on the support structure for detecting the rolling angle of the rollers;

[0009] The two opposing rollers are arranged at an angle; wherein, in the vertical direction, the upper ends of the two rollers are inclined in a direction that brings them closer to each other;

[0010] The support structure has a drag end at the front of the middle position and a docking connection end for connecting a pipeline surveying instrument at the rear of the middle position.

[0011] According to one aspect of the present invention, the bracket structure includes: a support structure, a traction structure disposed at the middle position of the support structure, and a rotating shaft structure disposed at opposite ends of the support structure and used to connect the rollers;

[0012] The traction structure and the support structure can be detachably installed;

[0013] The front end of the traction structure forms the towing end, and the rear end of the traction structure forms the docking connection end.

[0014] According to one aspect of the present invention, the support structure includes: a crossbeam body, and connecting longitudinal beams symmetrically arranged at opposite ends of the crossbeam body;

[0015] The longitudinal beam is arranged perpendicular to the length direction of the main body of the crossbeam, and the front end of the longitudinal beam extends beyond the front side of the main body of the crossbeam.

[0016] The front end of the connecting longitudinal beam is provided with a shaft mounting hole for installing the shaft structure.

[0017] Along a direction away from the roller, the shaft mounting hole extends through the opposite sides of the connecting longitudinal beam, and the axial direction of the shaft mounting hole is inclined downward.

[0018] According to one aspect of the present invention, the side of the connecting longitudinal beam near the roller is an inclined surface, and the inclination angle of the inclined surface is consistent with the inclination angle of the roller.

[0019] According to one aspect of the present invention, the rear end of the connecting longitudinal beam extends beyond the rear side of the connecting longitudinal beam.

[0020] According to one aspect of the present invention, a groove for mounting the sensor and a cover plate for closing the groove are provided on the upper side of the support structure in the vertical direction.

[0021] Two of the arrangement slots are symmetrically arranged on the upper side of the support structure, and two of the cover plates are symmetrically arranged on the upper side of the support structure.

[0022] The arrangement groove includes: a first groove and a second groove;

[0023] The first groove is arranged on the upper side of the connecting longitudinal beam, and the length direction of the first groove is consistent with the length direction of the connecting longitudinal beam;

[0024] The second groove is arranged on the upper side of the main body of the beam, and the length direction of the second groove is consistent with the length direction of the main body of the beam;

[0025] One end of the second groove is connected to the first groove, and the other end of the second groove forms a groove opening on the rear side of the main body of the beam.

[0026] The groove opening is positioned adjacent to the traction structure.

[0027] According to one aspect of the present invention, the traction structure includes: a connecting shaft and a mating connector sleeved on the connecting shaft;

[0028] The connecting shaft is a stepped shaft, and it includes: a first shaft segment, a second shaft segment, and a third shaft segment connected coaxially in sequence;

[0029] The third shaft segment is a hollow shaft segment, and the end of the third shaft segment away from the second shaft segment has an opening;

[0030] The sidewall of the third shaft segment is provided with a through hole connecting its inner and outer sides, and the through hole is provided adjacent to the front end of the third shaft segment.

[0031] According to one aspect of the present invention, a transition groove is provided on the outer side of the third shaft segment;

[0032] The extension direction of the transition groove is consistent with the axial direction of the third shaft segment;

[0033] The front end of the transition groove forms an opening on the front end face of the third shaft segment, and the rear end of the transition groove is connected to the through hole.

[0034] According to one aspect of the present invention, the third shaft segment is provided with a radially enlarged structure;

[0035] The radially enlarging structure is disposed at the rear end of the third shaft segment;

[0036] The radially enlarged structure includes: a first enlarged portion and a second enlarged portion arranged coaxially;

[0037] The outer diameter of the first enlarged portion is larger than the outer diameter of the second enlarged portion;

[0038] The outer side of the second enlarged portion is provided with an annular groove for installing a sealing ring.

[0039] According to one aspect of the present invention, the rotatable end of the docking connector is sleeved on the third shaft segment; wherein, the docking connector includes: a hollow cylinder and an annular baffle disposed at one end of the hollow cylinder;

[0040] The radial dimension of the hollow portion of the annular baffle is greater than or equal to the outer diameter of the third shaft segment, and less than the outer diameter of the first enlarged portion;

[0041] The inner diameter of the hollow cylinder is larger than the outer diameter of the first enlarged portion, and a connecting thread is provided on the inner side of the hollow cylinder;

[0042] The support structure is provided with a nested mounting hole in the middle position, and the second shaft segment is detachably nested with the nested mounting hole;

[0043] The sensor is a magnetic sensor;

[0044] On the side of the roller opposite to the support structure, there are multiple magnets arranged at equal intervals in a ring for detection by the magnetic sensor.

[0045] According to one embodiment of this utility model, by using two inclined rollers, the axial extension lines of the two rollers can intersect below the support structure. Furthermore, the lower ends of the two rollers can be inclined in a direction away from each other. In this configuration, the lower end of the pipeline measurement auxiliary device can have a wider dimension, thereby effectively increasing the contact position between the rollers and the pipe sidewall. Moreover, the inclined rollers can make the support of the pipeline measurement auxiliary device in the pipeline more stable, and make it easier to keep the center of gravity of the entire pipeline measurement auxiliary device in the radial direction of the pipeline (such as the radial direction perpendicular to the ground), thereby making it easier for the pipeline measurement auxiliary device to maintain balance in the pipeline.

[0046] According to one aspect of this utility model, the applicability to pipes of different diameters can be achieved by adjusting the tilt angle of the rollers. Furthermore, rollers of different sizes can be replaced for different pipe diameters, thereby making this approach more adaptable to the corresponding pipes.

[0047] According to one aspect of this utility model, this solution can effectively simplify the overall structural complexity, eliminate the complex wheel assembly structure that contacts the upper pipe wall, and fully guarantee the ease of use, reliability, and safety of this solution.

[0048] According to one aspect of this utility model, the dimensions of the connecting longitudinal beam are more flexible. In particular, by making the connecting longitudinal beam protrude to the rear, the sensors can be arranged more flexibly. As a result, the detection of the roller 2 can be realized more conveniently, and the flexibility and convenience of sensor arrangement in this aspect are greatly improved.

[0049] According to one aspect of this utility model, when the sensor can be arranged and installed based on the first and second grooves, the wires connecting the sensor can also be arranged along the extension direction of the grooves and finally led out from the groove opening. Furthermore, the way of setting the groove opening adjacent to the traction structure can effectively allow the led-out wires to be introduced into the traction structure with the shortest distance, which can effectively avoid the wires being exposed on the outside, and thus is more beneficial to ensuring the safety and reliability of the wire arrangement.

[0050] According to one aspect of this utility model, the detachable traction structure enables flexible assembly and disassembly, which is beneficial for the storage and transportation of this solution, and also facilitates the replacement of connecting shafts of different lengths according to different usage scenarios, thereby improving the ease of use of this solution. Attached Figure Description

[0051] Figure 1 This is a perspective view of a pipeline measuring device for ultra-large diameter pipelines, according to one embodiment of the present invention.

[0052] Figure 2 This is a diagram showing the connection structure between the support structure and the roller in one embodiment of the present invention.

[0053] Figure 3 This is a perspective view of the support structure according to one embodiment of the present utility model;

[0054] Figure 4 This is a structural diagram of the connecting shaft according to one embodiment of the present invention;

[0055] Figure 5 This is a rear view of the support structure according to one embodiment of the present utility model;

[0056] Figure 6 This is a structural diagram of a roller according to one embodiment of the present invention. Detailed Implementation

[0057] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0058] In describing embodiments of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" express orientations or positional relationships based on the orientations or positional relationships shown in the relevant drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0059] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described in detail here, but the embodiments of the present invention are not limited to the following embodiments.

[0060] Combination Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, a pipeline measuring device for ultra-large diameter pipelines includes: a support structure 1, rollers 2 symmetrically arranged on the left and right sides of the support structure 1, and a sensor mounted on the support structure 1 for detecting the rolling angle of the rollers 2. In this embodiment, the two opposing rollers 2 are arranged at an angle. Vertically, the upper ends of the two rollers 2 are inclined towards each other. The inclined arrangement of the two rollers 2 allows their axial extensions to intersect below the support structure 1, and consequently, their lower ends are inclined away from each other. This arrangement allows the lower end of the pipeline measuring device to have a wider dimension, effectively increasing the contact position between the rollers 2 and the pipe sidewall. Furthermore, the inclined arrangement of the two rollers 2 makes the support of the pipeline measuring device in the pipeline more stable, making it easier to keep the center of gravity of the entire pipeline measuring device in the radial direction of the pipeline (e.g., the radial direction perpendicular to the ground), thus making it easier for the pipeline measuring device to maintain balance in the pipeline.

[0061] Furthermore, to facilitate the installation and use of the pipeline measurement auxiliary device in this solution, a towing end can be provided on the front side of the middle position of the support structure 1, and a docking connection end for connecting the pipeline surveying instrument can be provided on the rear side of the middle position of the support structure 1. Based on this arrangement, the pipeline measurement auxiliary device of this solution can be moved along the pipeline by connecting the towing mechanism and the towing end, and the docking connection end of the pipeline measurement auxiliary device can be easily connected and installed with the pipeline surveying instrument, thereby improving the flexibility of use of this solution.

[0062] With the above settings, this solution can be adapted to pipes of different diameters by adjusting the tilt angle of roller 2. Furthermore, rollers of different sizes can be replaced for pipes of different diameters, making this solution more adaptable to the corresponding pipes.

[0063] Combination Figure 1 , Figure 2 and Figure 3 As shown, according to one embodiment of the present invention, the pipeline measurement auxiliary device of this solution has a symmetrical structure, which makes it easier to ensure the stability of travel in the pipeline; specifically, the support structure 1 includes: a support structure 11, a traction structure 12 disposed in the middle of the support structure 11, and a rotating shaft structure 13 disposed at opposite ends of the support structure 11 for connecting the rollers 2; wherein, the traction structure 12 is detachably installed from the support structure 11; the front end of the traction structure 12 forms a dragging end, and the rear end of the traction structure 12 forms a docking connection end.

[0064] In this embodiment, to ensure the structural reliability of the entire pipeline measurement auxiliary device, the support structure 11 and the traction structure 12 can be made of metal, thereby ensuring its reliability in use.

[0065] In this embodiment, to ensure the stable connection between the traction structure 12 and the support structure 11, a locking connector can be further provided at the connection position to make the installation between them more reliable.

[0066] Combination Figure 1 , Figure 2 and Figure 3As shown, according to one embodiment of the present invention, the support structure 11 includes: a crossbeam body 111, and connecting longitudinal beams 112 symmetrically arranged at opposite ends of the crossbeam body 111; wherein, the crossbeam body 111 is generally elongated, and the connecting longitudinal beams 112 are generally elongated, thus, the length direction of the connecting longitudinal beams 112 is perpendicular to the length direction of the crossbeam body 111, and the front end of the connecting longitudinal beams 112 extends beyond the front side of the crossbeam body 111; in this embodiment, the front end of the connecting longitudinal beams 112 is provided with a pivot mounting hole 1121 for mounting the pivot structure 13; furthermore, along the direction away from the roller 2, the pivot mounting hole 1121 penetrates the opposite sides of the connecting longitudinal beams 112, and the axial direction of the pivot mounting hole 1121 is arranged in an inclined downward manner.

[0067] In this embodiment, the pivot mounting hole 1121 is positioned close to the front end of the connecting longitudinal beam 112, thereby allowing the roller 2 to be mounted further forward.

[0068] The axial direction of the rotating shaft structure 13 can be tilted by the inclined rotating shaft mounting hole 1121, thereby achieving the inclined arrangement of the roller 2. In addition, by arranging the rotating shaft mounting hole 1121 at the front end of the connecting longitudinal beam 112, the installation position of the roller 2 can be offset forward relative to the crossbeam body 111, thereby effectively avoiding interference of the roller 2 with the docking connection end, so as to fully ensure the ease of use of this solution.

[0069] like Figure 2 As shown, according to one embodiment of the present invention, the side of the connecting longitudinal beam 112 near the roller 2 is an inclined surface, and the inclination angle of the inclined surface is consistent with the inclination angle of the roller 2. In this embodiment, there is a gap between the inclined surface of the connecting longitudinal beam 112 and the roller 2.

[0070] In this embodiment, the side of the connecting longitudinal beam 112 away from the roller 2 can be set as an inclined surface, and its inclination angle can also be set to be consistent with the inclination angle of the roller 2. This increases the space between the two opposing connecting longitudinal beams 112, which is more beneficial for facilitating the arrangement of the structure.

[0071] By setting the connecting longitudinal beam 112 near the roller 2 as an inclined surface parallel to the roller 2, it is easier to ensure the consistency of the spacing between the roller 2 and the connecting longitudinal beam 112, thereby effectively avoiding interference between the roller 2 and the connecting longitudinal beam 112, making the operation of this scheme more stable and reliable.

[0072] like Figure 3 As shown, according to one embodiment of the present invention, the rear end of the connecting longitudinal beam 112 extends beyond the rear side of the connecting longitudinal beam 112.

[0073] The above-mentioned configuration allows for more flexible dimensional settings for the connecting longitudinal beam 112. In particular, by protruding the connecting longitudinal beam 112 to the rear, sensors can be arranged more flexibly, thereby facilitating the detection of the roller 2 and significantly improving the flexibility and convenience of sensor arrangement in this solution.

[0074] like Figure 3 As shown, according to one embodiment of the present invention, along the vertical direction, an arrangement slot 11a for installing sensors and a cover plate 11b for closing the arrangement slot 11a are provided on the upper side of the support structure 11; wherein, two arrangement slots 11a are symmetrically arranged on the upper side of the support structure 11, and two cover plates 11b are symmetrically arranged on the upper side of the support structure 11. In this embodiment, the arrangement slot 11a includes: a first groove 11a1 and a second groove 11a2; wherein, the first groove 11a1 and the second groove 11a2 are both linear grooves, wherein the first groove 11a1 is arranged on the upper side of the connecting longitudinal beam 112, and the length direction of the first groove 11a1 is consistent with the length direction of the connecting longitudinal beam 112; the second groove 11a2 is arranged on the upper side of the crossbeam body 111, and the length direction of the second groove 11a2 is consistent with the length direction of the crossbeam body 111.

[0075] In this embodiment, the first groove 11a1 can be configured as a rectangular groove, with its rear end adjacent to the rear end of the connecting longitudinal beam 112. The front end of the first groove 11a1 extends towards the front end of the connecting longitudinal beam 112, and the front end of the first groove 11a1 and the front end of the connecting longitudinal beam 112 are spaced apart. This configuration allows the extension range of the first groove 11a1 to fully cover the area of ​​the roller 2 away from the axis of rotation. Therefore, the position of the sensor can be flexibly arranged on the first groove 11a1, allowing for the placement of structural components for sensor detection at corresponding positions on the roller 2 to achieve accurate measurement of the rotation angle of the roller 2. By changing the installation position and number of structural components on the roller 2, the distance between adjacent structural components can be adjusted, thereby enabling different settings for the detection frequency and accuracy of the rotation angle. Specifically, the further away from the axis of rotation, the more structural components can be installed, resulting in a finer division of the rotation angle and thus higher detection accuracy.

[0076] In this embodiment, the first groove 11a1 is positioned close to the outer edge of the connecting longitudinal beam 112, thereby allowing the sensor to be closer to the roller 2 and improving the detection sensitivity. Alternatively, the opening of the side wall of the first groove 11a1 near the roller 2 can be replaced, or the side wall near the roller 2 can be replaced with a non-metallic material plate to avoid the influence of the side wall of the first groove 11a1 on the sensor's detection sensitivity. The specific configuration can be set according to actual needs and will not be elaborated here.

[0077] In this embodiment, one end of the second groove 11a2 is connected to the first groove 11a1, and the other end of the second groove 11a2 forms a groove opening 11a21 on the rear side of the crossbeam body 111. Specifically, the end of the second groove 11a2 away from the first groove 11a1 bends and extends toward the rear side of the crossbeam body 111 to form the groove opening 11a21, and the groove opening 11a21 is arranged adjacent to the traction structure 12.

[0078] With the above configuration, the sensor can be arranged and installed based on the first groove 11a1 and the second groove 11a2. The wires connecting the sensor can also be arranged along the extension direction of the grooves and finally led out through the groove opening 11a21. Furthermore, the arrangement of the groove opening 11a21 adjacent to the traction structure 12 can effectively allow the led-out wires to be introduced into the traction structure 12 with the shortest distance, which can effectively avoid the wires being exposed on the outside, and is more beneficial to ensuring the safety and reliability of the wire arrangement.

[0079] In this embodiment, the cover plate 11b can be configured as a T-shaped plate. Thus, the T-shaped plate can be installed on the support structure 11 to completely cover the arrangement groove 11a. This prevents external dust, impurities, etc. from falling in, effectively ensuring the cleanliness of the sensor installation position, which is more beneficial to ensuring the stable and reliable operation of the sensor.

[0080] In this embodiment, the cover plate 11b is locked to the support structure 11 based on a threaded connection to effectively ensure a reliable and tight installation. To further ensure the sealing of the connection point, a sealing ring can be installed at the connection point.

[0081] In this embodiment, to avoid damage to the wires, a chamfer or rounded corner can be provided at the edge of the groove opening 11a21 to effectively ensure the reliability of this solution.

[0082] Combination Figure 3 , Figure 4 and Figure 5As shown, according to one embodiment of the present invention, the traction structure 12 includes: a connecting shaft 121 and a mating connector 122 sleeved on the connecting shaft 121; wherein, the connecting shaft 121 is a stepped shaft, and it includes: a first shaft segment 121a, a second shaft segment 121b, and a third shaft segment 121c connected coaxially in sequence; in this embodiment, the diameter of each shaft segment gradually increases from the first shaft segment 121a, the second shaft segment 121b to the third shaft segment 121c to form a stepped shaft, thereby facilitating the installation of the traction structure 12 and the support structure 11. In this embodiment, the third shaft segment 121c is a hollow shaft segment, and the end of the third shaft segment 121c away from the second shaft segment 121b is provided with an opening; furthermore, the side wall of the third shaft segment 121c is provided with a through hole 121c1 connecting its inner and outer sides, and the through hole 121c1 is arranged adjacent to the front end of the third shaft segment 121c.

[0083] In this embodiment, the first shaft segment 121a, the second shaft segment 121b, and the third shaft segment 121c can be integrally formed or connected in a detachable manner (such as threaded connection). The configuration can be made according to different needs. In particular, when there is a need to replace the shaft segment, a detachable connection method can be preferred to improve the convenience of replacement.

[0084] In this embodiment, multiple circumferential vias 121c1 along the third shaft segment 121c can be provided at intervals. Preferably, two vias 121c1 can be provided, each via 121c1 corresponding to a groove opening 11a21. This facilitates the introduction of wires into the third shaft segment 121c via the shortest path, and then the wires can be easily introduced into the connecting pipeline surveying instrument from the end opening of the third shaft segment 121c. This allows the data collected by the sensor to be input into the pipeline surveying instrument, effectively ensuring the safety and reliability of the entire wiring path. Of course, more circumferential vias 121c1 along the third shaft segment 121c can be provided (such as 3 or 4), which facilitates the installation of the connecting shaft 121 and reduces the difficulty of adjusting the position of the vias 121c1.

[0085] Combination Figure 4 and Figure 5 As shown, according to one embodiment of the present invention, a transition groove 121c2 is provided on the outer side of the third shaft segment 121c; wherein, the extending direction of the transition groove 121c2 is consistent with the axial direction of the third shaft segment 121c; in this embodiment, the front end of the transition groove 121c2 forms an opening on the front end face of the third shaft segment 121c, and the rear end of the transition groove 121c2 is connected to the through hole 121c1.

[0086] With the above-mentioned design, the wires led out from the groove opening 11a21 can be more conveniently introduced into the through hole 121c1 through the transition groove 121c2, which effectively avoids the wires protruding on the outer side of the third shaft section 121c, thus being more beneficial to ensuring the safety and reliability of the wires.

[0087] like Figure 4 As shown, according to one embodiment of the present invention, the third shaft segment 121c is provided with a radially enlarging structure 121c3; wherein, the radially enlarging structure 121c3 is disposed at the rear end of the third shaft segment 121c. In this embodiment, the radially enlarging structure 121c3 includes: a first enlarging portion 121c31 and a second enlarging portion 121c32 coaxially disposed; further, the outer diameter of the first enlarging portion 121c31 is larger than the outer diameter of the second enlarging portion 121c32; an annular groove 121c321 for installing a sealing ring is provided on the outer side of the second enlarging portion 121c32.

[0088] In this embodiment, the first enlarged portion 121c31 can be formed into an annular plate with an axial length less than its radial wall thickness, thereby forming a limiting ring to effectively block the connecting member 122 and facilitate the installation of the connecting end of this solution with the pipeline mapping instrument. Furthermore, the second enlarged portion 121c32 can be formed into an annular cylinder with an axial length greater than its radial wall thickness. This allows for the provision of multiple annular grooves 121c321 on the outer surface of the second enlarged portion 121c32 to facilitate the installation of multiple sealing rings, thereby improving the sealing performance at the connection point with the pipeline mapping instrument and enhancing the reliability and stability of the installation.

[0089] Combination Figure 3 , Figure 4 and Figure 5 As shown, according to one embodiment of the present invention, the rotatable end of the docking connector 122 is sleeved on the third shaft segment 121c; wherein, the docking connector 122 includes: a hollow cylinder 1221 and an annular baffle 1222 provided at one end of the hollow cylinder 1221; wherein, the radial dimension of the hollow portion of the annular baffle 1222 is greater than or equal to the outer diameter of the third shaft segment 121c, and less than the outer diameter of the first enlarged portion 121c31; the inner diameter of the hollow cylinder 1221 is greater than the outer diameter of the first enlarged portion 121c31, and a connecting thread is provided on the inner side of the hollow cylinder 1221. Through the above configuration, the docking connector 122 can be restricted by the abutment between the annular baffle 1222 and the first enlarged portion 121c31, thereby facilitating the coaxial nesting of the second enlarged portion 121c32 and the end of the pipeline surveying instrument by the rotation of the docking connector 122 and the screwing of the pipeline surveying instrument end, so as to achieve reliable and stable docking installation.

[0090] Combination Figure 2 , Figure 3 and Figure 4 As shown, according to one embodiment of the present invention, a nested mounting hole is provided in the middle position of the support structure 11, and the second shaft segment 121b is detachably nested with the nested mounting hole; in this embodiment, in order to further ensure the reliable stability of the nested position, a threaded connector can be further provided to achieve the locking and fixing of the support structure 11 and the second shaft segment 121b.

[0091] like Figure 6 As shown, according to one embodiment of this utility model, the sensor is a magnetic sensor; wherein, on the side of the roller 2 opposite to the support structure 1, multiple magnets 21 for detection by the magnetic sensor are arranged at equal intervals along a ring. In this embodiment, multiple mounting holes can be arranged axially on the roller 2, so that the magnets 21 can be embedded in the mounting holes to ensure accurate and reliable installation position. Furthermore, the positions of the multiple mounting holes are the positions that equally divide the circumferential angle of the roller, so that the angle rolled over each time it passes a magnet 21 can be collected, thereby converting it into the circumferential length of the roller 2, realizing the calculation of mileage.

[0092] like Figure 6 As shown, according to one embodiment of this utility model, the roller 2 and the rotating shaft structure 13 are coaxially connected and fixed with threaded connectors. Furthermore, to improve the vibration damping effect of the roller 2, an annular rubber ring can be provided on the outer side of the roller 2. Furthermore, to achieve the rotation of the roller 2, the rotating shaft structure 13 is rotatably mounted to the connecting longitudinal beam 112, and a rotating bearing is provided at the mounting position to improve and reduce the friction at the rotating connection position.

[0093] The above content is merely an example of a specific solution of this utility model. For the equipment and structures not described in detail, it should be understood that they are implemented using common equipment and methods already available in the field.

[0094] The above description is merely one solution of this utility model and is not intended to limit it. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pipeline measuring device for use with very large diameter pipelines, characterized by, include: A support structure (1) has rollers (2) symmetrically arranged on the left and right sides of the support structure (1) and a sensor installed on the support structure (1) for detecting the rolling angle of the rollers (2); The two opposing rollers (2) are arranged at an angle; wherein, in the vertical direction, the upper ends of the two rollers (2) are inclined in a direction that brings them closer to each other; The support structure (1) has a drag end at the front of the middle position and a docking connection end for connecting the pipeline surveying instrument at the rear of the middle position.

2. The pipe line measuring device for very large pipe diameter pipelines as claimed in claim 1, wherein, The support structure (1) includes: a support structure (11), a traction structure (12) disposed in the middle of the support structure (11), and a rotating shaft structure (13) disposed at opposite ends of the support structure (11) and used to connect the roller (2). The traction structure (12) and the support structure (11) are detachably installed; The front end of the traction structure (12) forms the towing end, and the rear end of the traction structure (12) forms the docking connection end.

3. The pipe line measuring device for very large pipe diameter pipelines as claimed in claim 2, wherein, The support structure (11) includes: a crossbeam body (111) and connecting longitudinal beams (112) symmetrically arranged at opposite ends of the crossbeam body (111); The longitudinal beam (112) is arranged perpendicular to the length direction of the main body of the crossbeam (111), and the front end of the longitudinal beam (112) extends beyond the front side of the main body of the crossbeam (111). The front end of the connecting longitudinal beam (112) is provided with a shaft mounting hole (1121) for mounting the shaft structure (13). Along a direction away from the roller (2), the shaft mounting hole (1121) passes through the opposite sides of the connecting longitudinal beam (112), and the shaft mounting hole (1121) is arranged in an axial direction inclined downward.

4. The pipe line measuring device for very large pipe diameter pipelines as claimed in claim 3 wherein, The side of the connecting longitudinal beam (112) near the roller (2) is an inclined surface, and the inclination angle of the inclined surface is consistent with the inclination angle of the roller (2).

5. The pipe line measuring device for very large pipe diameter pipelines as claimed in claim 3 wherein, The rear end of the connecting longitudinal beam (112) extends beyond the rear side of the connecting longitudinal beam (112).

6. A pigging apparatus for use in a very large diameter pipeline according to any one of claims 3 to 5, wherein, Along the vertical direction, an arrangement slot (11a) for installing the sensor and a cover plate (11b) for closing the arrangement slot (11a) are provided on the upper side of the support structure (11). Two arrangement slots (11a) are symmetrically arranged on the upper side of the support structure (11), and two cover plates (11b) are symmetrically arranged on the upper side of the support structure (11). The arrangement groove (11a) includes: a first groove (11a1) and a second groove (11a2); The first groove (11a1) is arranged on the upper side of the connecting longitudinal beam (112), and the length direction of the first groove (11a1) is consistent with the length direction of the connecting longitudinal beam (112). The second groove (11a2) is arranged on the upper side of the crossbeam body (111), and the length direction of the second groove (11a2) is consistent with the length direction of the crossbeam body (111); One end of the second groove (11a2) is connected to the first groove (11a1), and the other end of the second groove (11a2) forms a groove opening (11a21) on the rear side of the main body of the crossbeam (111). The groove opening (11a21) is positioned adjacent to the traction structure (12).

7. The pipe line measuring device for very large pipe diameter pipelines as claimed in claim 6 wherein, The traction structure (12) includes: a connecting shaft (121) and a mating connector (122) sleeved on the connecting shaft (121). The connecting shaft (121) is a stepped shaft, and it includes: a first shaft segment (121a), a second shaft segment (121b) and a third shaft segment (121c) connected coaxially in sequence. The third shaft segment (121c) is a hollow shaft segment, and the end of the third shaft segment (121c) away from the second shaft segment (121b) has an opening; The sidewall of the third shaft segment (121c) is provided with a through hole (121c1) connecting its inner and outer sides, and the through hole (121c1) is arranged adjacent to the front end of the third shaft segment (121c).

8. The pipe line measuring device for very large pipe diameter pipelines as claimed in claim 7 wherein, A transition groove (121c2) is provided on the outer side of the third shaft segment (121c). The extension direction of the transition groove (121c2) is consistent with the axial direction of the third shaft segment (121c); The front end of the transition groove (121c2) forms an opening on the front end face of the third shaft segment (121c), and the rear end of the transition groove (121c2) is connected to the through hole (121c1).

9. The pipe line measuring device for very large pipe diameter pipelines as claimed in claim 8, wherein, The third shaft segment (121c) is provided with a radially enlarged structure (121c3); The radially enlarged structure (121c3) is disposed at the rear end of the third shaft segment (121c); The radially enlarged structure (121c3) includes: a first enlarged portion (121c31) and a second enlarged portion (121c32) arranged coaxially. The outer diameter of the first enlarged portion (121c31) is larger than the outer diameter of the second enlarged portion (121c32); The outer side of the second enlarged portion (121c32) is provided with an annular groove (121c321) for installing a sealing ring.

10. The pipe line measuring device for very large pipe diameter pipelines as claimed in claim 9 wherein, The rotatable end of the docking connector (122) is sleeved on the third shaft segment (121c); wherein, the docking connector (122) includes: a hollow cylinder (1221) and an annular baffle (1222) provided at one end of the hollow cylinder (1221). The radial dimension of the hollow portion of the annular baffle (1222) is greater than or equal to the outer diameter of the third shaft segment (121c), and smaller than the outer diameter of the first enlarged portion (121c31). The inner diameter of the hollow cylinder (1221) is larger than the outer diameter of the first enlarged portion (121c31), and a connecting thread is provided on the inner side of the hollow cylinder (1221). The support structure (11) is provided with a nested mounting hole at the middle position, and the second shaft segment (121b) is detachably nested with the nested mounting hole; The sensor is a magnetic sensor; The plurality of magnets (21) for the magnetic sensor detection are arranged on the side opposite to the support structure (1) of the roller (2) in a ring shape at equal intervals.

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