CN114353672B - System and method for checking large-diameter pipeline lining fixing bolt - Google Patents
System and method for checking large-diameter pipeline lining fixing bolt Download PDFInfo
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- CN114353672B CN114353672B CN202210060056.0A CN202210060056A CN114353672B CN 114353672 B CN114353672 B CN 114353672B CN 202210060056 A CN202210060056 A CN 202210060056A CN 114353672 B CN114353672 B CN 114353672B
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a large-diameter pipeline lining fixing bolt inspection system and an inspection method, wherein the inspection system comprises the following components: an inner lining plate fixed on the inner wall of the pipeline through bolts; the first laser ranging module is suitable for measuring first distance information between the first laser ranging module and a bolt at a preset bolt position on the inner lining plate, and the second laser ranging module is suitable for measuring second distance information between the second laser ranging module and the inner lining plate of a non-bolt installation area at the periphery of the preset bolt position; and an analysis processing module which can deduce whether the bolt at the preset bolt position is missing or damaged according to the first distance information and the second distance information. The invention determines whether the bolt in the large pipeline is missing or damaged by a laser ranging method, replaces manual telescope inspection, can accurately judge the defect condition of the bolt, reduces the influence of subjective factors of personnel, and improves the inspection efficiency and accuracy.
Description
Technical Field
The invention relates to the technical field of maintenance of large pipelines, in particular to a large-diameter pipeline lining fixing bolt inspection system and an inspection method.
Background
When the large-scale pressure steel pipe of hydroelectric engineering is installed, because subsidence and temperature change set up the telescopic joint at certain position and compensate displacement deformation, in order to guarantee smooth reduction to the disturbance of inside fluidic of inner wall, need set up interior welt water conservancy diversion, interior welt adopts bolted connection to fix on the outer wall support generally, because factors such as long-time vibration, the bolt can drop, need periodic inspection change.
At present, the defect condition of the steel pipe lining fixing bolt is mainly obtained through telescope observation manually, however, because the difficulty of manual inspection of the inside light of the large-diameter steel pipe is relatively high, and whether the defect is detected or not is also required to be judged subjectively by people, the inspection efficiency and the inspection accuracy are relatively low.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is that the internal light of the large-diameter steel pipe in the prior art is poor, the manual inspection difficulty is high, the defect condition of the steel pipe lining fixing bolt is obtained manually through telescope observation, and the inspection efficiency and the inspection accuracy are low, so that the inspection system and the inspection method for determining the defect condition of the bolt through a laser ranging method are provided.
In order to achieve the above object, in a first aspect of the present invention, an embodiment of the present invention provides a large-diameter pipe lining fixing bolt inspection system including an inner lining plate fixed on an inner wall of a pipe by bolts, and a bolt detecting device provided in the pipe, the bolt detecting device including:
the laser ranging module comprises a first laser ranging module and a second laser ranging module which are arranged in a linear arrangement along the central axis direction of the pipeline;
wherein: the first laser ranging module is suitable for measuring first distance information between the first laser ranging module and a bolt at a preset bolt position on the inner lining plate;
the second laser ranging module is suitable for measuring second distance information between the second laser ranging module and the inner lining plate of the non-bolt installation area at the periphery of the preset bolt position;
and the analysis processing module is used for comparing and analyzing the first distance information and the second distance information, and deducing whether the bolt at the preset bolt position is missing or damaged according to the analysis result.
Optionally, the inner lining plate is of a cylindrical structure fixed on the inner peripheral wall of the pipeline, the bolts comprise a plurality of bolts, and the bolts are arranged at intervals along the circumferential direction of the inner lining plate;
the bolt detection device further comprises a rotary supporting seat, and the rotation axis of the rotary supporting seat is parallel to the central axis of the pipeline;
the first laser ranging module and the second laser ranging module are fixedly arranged on the rotary supporting seat and are suitable for detecting the defect condition of the bolt on the whole circumference of the lining plate along with the rotation of the rotary supporting seat.
Optionally, the laser ranging module further comprises:
the third laser ranging module and the second laser ranging module are distributed on two sides of the first laser ranging module along the axial direction of the pipeline;
and the distance between the optical axis of the third laser ranging module and the optical axis of the second laser ranging module is greater than the maximum radial length of the bolt cap.
Optionally, the rotary support base includes:
the outer bracket is fixedly arranged on the inner lining plate;
the inner bracket is rotatably arranged on the outer bracket, and the laser ranging module is fixedly arranged on the inner bracket;
the driving mechanism is suitable for driving the inner bracket to rotate so as to realize that the laser ranging module detects the defect condition of the bolt on the whole circumference of the inner lining plate.
Optionally, the inner support comprises:
an inner bracket main body;
the inner bracket main body is rotatably connected with the outer bracket through the rotating shaft, and the rotating shaft is parallel to the central axis direction of the pipeline;
the driving mechanism drives the inner bracket to rotate by driving the rotating shaft to rotate.
Optionally, the driving mechanism includes:
the stepping motor is arranged on the outer bracket;
the gear transmission assembly comprises a driving gear and a driven gear which are in transmission fit with each other, the driving gear is suitable for being connected with the output end of the stepping motor, the driven gear is suitable for being fixedly connected with the rotating shaft, and the stepping motor drives the inner support to rotate through the gear transmission assembly.
Optionally, the inner bracket main body comprises a mounting plate arranged parallel to the rotating shaft, and the laser ranging module is fixed on the mounting plate;
the bolt detection device further comprises a fixing support, the outer support is fixedly arranged on the fixing support, and the fixing support is supported and fixed on the inner lining plate.
In a second aspect of the present invention, an embodiment of the present invention further provides an inspection method of an inspection system having the above-mentioned large-diameter pipe lining fixing bolt, the method comprising:
acquiring the first excitationFirst distance information O between optical ranging module and bolt of preset bolt position on lining board 1 A. And second distance information O between the second laser ranging module and the inner lining plate of the non-bolt mounting area of the outer circumference of the preset bolt position 2 B；
If it is judged that O 1 A＞O 2 B, deducing that the bolt at the preset bolt position is missing; if it is judged that O 2 B＞O 1 A＞O 2 B-t, the damage of the bolt cap at the preset bolt position can be deduced, wherein t is the normal thickness of the undamaged bolt cap.
Optionally, the inspection method further comprises the steps of:
controlling the laser ranging module to rotate at a constant speed for one circle from a set starting point, and recording the rotation angle;
acquiring first distance information between the first laser ranging module and each preset bolt position in the circumferential direction of the inner lining plate and second distance information between the second laser ranging module and the inner lining plate at the periphery of each preset bolt position;
obtaining the defect condition of each preset bolt position by comparing the first distance information with the second distance information;
and counting and storing the number and positions of the missing bolts.
Optionally, the inspection method further comprises the steps of:
acquiring second distance information O between the second laser ranging module and the third laser ranging module and the lining plates of the non-bolt installation areas on two sides of the preset bolt position 2 B and third distance information O 3 C；
Setting a reference distance l= (O) 2 B+O 3 C) Comparing the first distance O 1 The size of A and the reference distance L;
if it is judged that O 1 A is larger than L, the missing of the bolt at the preset bolt position can be deduced; if it is judged that L > O 1 A > L-t, it can be inferred that the cap of the predetermined bolt is damaged.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. the embodiment of the invention provides a large-diameter pipeline lining fixing bolt inspection system, which comprises the following components: including through the interior welt of bolt fastening on the pipeline inner wall, and set up the bolt detection device in the pipeline, bolt detection device includes: the laser ranging module comprises a first laser ranging module and a second laser ranging module which are arranged in a linear arrangement along the central axis direction of the pipeline; wherein: the first laser ranging module is suitable for measuring first distance information between the first laser ranging module and a bolt at a preset bolt position on the inner lining plate; the second laser ranging module is suitable for measuring second distance information between the second laser ranging module and the inner lining plate of the non-bolt installation area at the periphery of the preset bolt position; and the analysis processing module is used for comparing and analyzing the first distance information and the second distance information, and deducing whether the bolt at the preset bolt position is missing or damaged according to the analysis result.
By means of the arrangement, whether the bolts at the preset bolt positions are missing or damaged can be deduced through comparing and analyzing the first distance information and the second distance information obtained by the laser ranging module, whether the bolts in the large-scale pipeline are missing or damaged is determined through a laser ranging method, manual telescope inspection is replaced, the defect condition of the bolts can be accurately judged, influence of subjective factors of personnel is reduced, and inspection efficiency and accuracy are greatly improved.
2. According to the embodiment of the invention, the laser ranging module is fixed on the rotary supporting seat through the arranged rotary supporting seat, and the rotary supporting seat is driven to rotate through the driving mechanism, so that the laser ranging module is driven to rotate, bolts on the circumferential direction of the inner lining plate can be detected, the detection coverage surface is more complete, and the efficiency is higher. In addition, the driving mechanism in the embodiment of the invention adopts the stepping motor, so that not only can the laser ranging module be driven to rotate, but also the rotating angle of the laser ranging module can be recorded, thereby being capable of assisting in marking the position of the missing bolt and facilitating the follow-up processing work.
3. According to the embodiment of the invention, through the third laser ranging module, when the bolt detection device is placed unevenly, the rotation axis of the bolt detection device forms a certain inclined included angle with the central axis of the pipeline, and the measurement track is inclined, the average value of the third distance information measured by the third laser ranging module and the second distance information measured by the second laser ranging module is used as the reference distance to carry out comparison analysis with the first distance information, so that the missing condition of the bolt is judged, and the arrangement can correct the rotation track, improve the detection accuracy and effectively avoid the detection error caused by the uneven placement of the bolt detection device.
4. The embodiment of the invention provides a method for checking a large-diameter pipeline lining fixing bolt, when judging that a first distance O is reached 1 A > the second distance O 2 B, deducing that the bolt at the position is missing; when judging O 2 B＞O 1 A＞O 2 B-t, where t is the normal thickness of the undamaged bolt cap. According to the embodiment of the invention, the distance between the bolt position on the inner lining plate and the non-bolt installation area is measured and compared by the laser ranging method to determine whether the bolt is missing or whether the bolt cap is damaged, the measured data are stored, the missing or damaged bolt positions and number are marked, and the efficiency of subsequent processing is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a forward structure of an overall arrangement of an inspection system in an embodiment of the invention;
FIG. 2 is a schematic side cross-sectional view of a portion of the structure of an inspection system in accordance with an embodiment of the present invention;
FIG. 3 is a schematic plan view of an assembled lining board and bolts according to an embodiment of the present invention;
FIG. 4 is a three-dimensional schematic view of an assembled lining board and bolts according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the measurement principle of the inspection system according to the embodiment of the present invention;
FIG. 6 is a schematic view of a rotary support base according to an embodiment of the present invention;
FIG. 7 is a flow chart of an inspection method according to an embodiment of the invention;
reference numerals:
1. an inner liner; 11. presetting the position of a bolt; 12. a bolt loop line region; 101. a first end; 102. a second end;
2. a bolt;
3. a bolt detection device;
31. a rotary support base; 311. an outer bracket; 312. an inner bracket; 3121. a mounting plate; 3122. a rotation shaft; 313. a stepping motor; 314. a gear drive assembly;
32. a fixed bracket;
33. and the laser ranging module.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by a worker of ordinary skill in the art without making any inventive effort, are intended to be within the scope of this invention based on the embodiments of this invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present invention can be understood in a specific case by a worker of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The invention aims to solve the technical problems that the internal light of a large-diameter steel pipe in the prior art is poor, the manual inspection difficulty is high, the defect condition of a steel pipe lining fixing bolt is obtained manually through telescope observation, and the inspection efficiency and the inspection accuracy are low, so that an inspection system and an inspection method for determining the defect condition of the bolt through a laser ranging method are provided.
Example 1
As shown in fig. 1 to 6, an embodiment of the present invention provides a large-diameter pipe lining fixing bolt inspection system including a lining plate 1 fixed on an inner wall of a pipe by bolts 2, and a bolt detection device 3 provided in the pipe, the bolt detection device 3 being adapted to detect a missing or damaged condition of the fixing bolts 2 on the lining plate 1.
Specifically, the bolt detection device 3 comprises a laser ranging module 33 and an analysis processing module, wherein the laser ranging module 33 is suitable for measuring the distance information from the laser ranging module 33 to the lining surface of the lining plate 1, and the analysis processing module is suitable for analyzing and deducing the missing condition of the bolt 2 according to the distance information measured by the laser ranging module 33.
Optionally, the laser ranging module 33 includes a first laser ranging module and a second laser ranging module that are arranged in a linear arrangement along a central axis direction of the pipe, wherein: the first laser ranging module is suitable for measuring first distance information between the first laser ranging module and a bolt 2 of a preset bolt position 11 on the inner lining plate 1; the second laser ranging module is adapted to measure second distance information between the second laser ranging module and the interior lining 1 of the non-bolt mounting area of the outer circumference of the bolt 2.
Optionally, the analysis processing module compares and analyzes the first distance information and the second distance information, and deduces whether the bolt 2 at the preset bolt position 11 is missing or damaged according to the analysis result.
In the embodiment of the invention, by comparing and analyzing the first distance information and the second distance information acquired by the laser ranging module 33, whether the bolt 2 at the preset bolt position 11 is missing or damaged can be deduced, whether the bolt 2 in the large-scale pipeline is missing or damaged is determined by a laser ranging method, and the defect condition of the bolt 2 can be accurately judged by replacing manual telescope inspection, the influence of subjective factors of personnel is reduced, and the inspection efficiency and accuracy are greatly improved.
In particular, the first laser distance measuring module is used for measuring a first distance O thereof from the bolt 2 of the preset bolt position 11 on the lining plate 1 1 A, the second laser distance measuring module is used for measuring a second distance O between the second laser distance measuring module and the inner lining surface of the inner lining plate 1 of the non-bolt installation area of the periphery of the bolt 2 2 B。
In the bolt-free region of the lining plate 1, since the first laser ranging module and the second laser ranging module are arranged in a linear arrangement along the central axis direction of the pipe, the first distance O is measured 1 A is equal to the second distance O 2 B。
In case of a preset bolt position 11 of the lining plate 1, where the bolt 2 is not missing, the first distance O is measured because the bolt cap of the bolt 2 has a certain thickness to protrude from the lining surface 1 A is less than the second distance O 2 B, a step B; in the event of a missing bolt, the bolt hole of the preset bolt position 11 is through, and therefore the first distance O is measured 1 A is greater than the second distance O 2 B, therefore, by comparing the first distance O 1 A and a second distance O 2 B, deducing whether the bolt 2 is missing.
When the missing part structure of the bolt cap is damaged, the thickness of the bolt cap is correspondingly reduced, and then the measured O is measured 2 B＞O 1 A＞O 2 B-t, wherein t is the thickness of the bolt cap, when the end of the bolt cap breaks open the lost part, the lost part can also pass through the first distance O 1 A and a second distance O 2 And B, judging the damage condition of the bolt cap, and carrying out statistics storage on the damage condition of the bolt cap so as to facilitate subsequent processing.
Further, in the embodiment of the present invention, the distances from the laser transmitting portion of the first laser ranging module and the laser transmitting portion of the second laser ranging module to the central axis of the pipe are equal, and the distances from the laser receiving portion of the first laser ranging module and the laser receiving portion of the second laser ranging module to the central axis of the pipe are also equal.
Alternatively, as shown in fig. 1 to 3, the lining board 1 is a cylindrical structure fixed on the inner peripheral wall of the pipe, the lining board 1 is an elongated plate-shaped structure, the elongated lining board 1 comprises a first end 101 and a second end 102, and the first end 101 and the second end 102 are connected and fixed to form the cylindrical structure fixed on the inner peripheral wall of the pipe. The bolts 2 include a plurality of bolts 2 arranged at intervals along the circumferential direction of the inner liner plate 1. The bolts 2 are linearly arranged in the circumferential direction of the lining plate 1, and the connecting lines of the bolts 2 form a bolt loop line area 12.
Optionally, in an embodiment of the present invention, the pipe is disposed laterally, and a central axis direction of the pipe is parallel to a horizontal plane.
Optionally, the bolt detection device 3 further comprises a rotary support seat 31, and the rotation axis of the rotary support seat 31 is parallel to the central axis of the pipeline; the first laser ranging module and the second laser ranging module are fixedly arranged on the rotary supporting seat 31 and are suitable for detecting the defect condition of the bolts on the circumference of the inner lining plate 1 along with the rotation of the rotary supporting seat 31.
According to the embodiment of the invention, the laser ranging module 33 is fixed on the rotary supporting seat 31 through the arranged rotary supporting seat 31, and the rotation of the rotary supporting seat 31 is driven to drive the laser ranging module 33 to rotate, so that the bolts 2 on the circumferential direction of the lining plate 1 can be detected, the detection coverage is more complete, and the efficiency is higher.
Alternatively, as shown in fig. 2 and 5, the optical axis of the first laser ranging module faces the bolt loop area 12, and the first laser ranging module may scan the bolt 2 of one circle of the inner lining plate 1 when the rotary support seat 31 rotates.
Optionally, in an embodiment of the present invention, the laser ranging module 33 further includes a third laser ranging module, where the third laser ranging module and the second laser ranging module are distributed on two sides of the first laser ranging module along an axial direction of the pipe; and the distance between the optical axis of the third laser ranging module and the optical axis of the second laser ranging module is greater than the maximum radial length of the bolt cap.
Further, as shown in fig. 2 to 5, the optical axes of the first laser ranging module correspond to the bolt loop line area 12, and the optical axes of the second laser ranging module and the third laser ranging module correspond to the non-bolt mounting areas on both sides of the bolt loop line area 12. The first laser ranging module, the second laser ranging module and the third laser ranging module have the same distance to the central axis of the pipeline. The second laser distance measuring module is used for measuring second distance information O of the lining plate 1 to the non-bolt installation area on one side of the bolt ring line area 12 2 B for measuring a third distance information O of the interior lining 1 to the non-bolt-mounting area on the other side of the bolt-ring area 12 3 C and through the second distance information O 2 B and third distance information O 3 The average value of C is taken as a reference distance and is matched with the first distance information O 1 And A, comparing and judging the missing condition of the bolt.
Further, as shown in fig. 4 and 5, the emission point O of the laser ranging module 33 is set as the starting point, and B, C is the optical axes of the second and third laser ranging modulesA is the falling point of the optical axis of the first laser ranging module on the bolt 2 at the falling point of the inner lining surface of the inner lining plate 1 on two sides of the bolt 2, then O 1 A is the distance between the first laser ranging module and the point A, O 2 B is the distance between the second laser ranging module and the point B, O 3 C is the distance between the third laser ranging module and the point C.
According to the embodiment of the invention, due to the fact that the diameter of the pipeline is large, when the bolt detection device 3 is placed unevenly, the rotation axis of the bolt detection device 3 forms a certain inclined included angle with the central axis of the pipeline, and the measurement track is inclined, the average value of the third distance information measured by the third laser ranging module and the second distance information measured by the second laser ranging module is used as the reference distance to be compared and analyzed with the first distance information, so that the missing condition of the bolt 2 is judged, and the arrangement can correct the rotation track, improve the detection accuracy and effectively avoid the detection error caused by the uneven placement of the bolt detection device 3.
Alternatively, in the embodiment of the present invention, the rotary support base 31 includes an outer bracket 311 and an inner bracket 312, and the outer bracket 311 is supported and fixed on the inner liner 1; the inner bracket 312 is rotatably disposed on the outer bracket 311, and the laser ranging module 33 is fixedly disposed on the inner bracket 312. A driving mechanism adapted to drive the rotation of the inner bracket 312 is further included, thereby realizing that the laser ranging module 33 inspects the bolt defect condition in the entire circumference of the interior lining plate 1.
Alternatively, the inner support 312 includes an inner support body rotatably connected to the outer support 311 through the rotation shaft 3122, and a rotation shaft 3122, the rotation shaft 3122 being parallel to the central axis direction of the pipe; the driving mechanism drives the inner support 312 to rotate by driving the rotation shaft 3122 to rotate.
Specifically, the two rotation shafts 3122 are fixedly disposed on both side ends of the inner bracket body, and the outer bracket 311 is correspondingly disposed with rotation shaft holes that are matched with the rotation shafts 3122.
Alternatively, the driving mechanism includes a stepping motor 313, and the stepping motor 313 is fixedly disposed on the outer bracket 311. The driving mechanism in the embodiment of the invention adopts the stepping motor 313, which not only can drive the laser ranging module 33 to rotate, but also can record the rotation angle of the laser ranging module 33, thereby being capable of assisting in marking the position of the missing bolt 2 and being convenient for the follow-up processing work.
Optionally, a reducer is connected to the output end of the stepper motor 313, and the driving mechanism further includes a gear assembly 314 drivingly connected between the stepper motor 313 and the rotation shaft 3122. The gear assembly 314 includes a driving gear adapted to be coupled to an output of the stepper motor 313 and a driven gear adapted to be fixedly coupled to the rotation shaft 3122 in driving engagement with each other. The stepper motor 313 drives the rotation shaft 3122 to rotate through the gear transmission assembly 314, thereby driving the inner support 312 to rotate.
Alternatively, in the embodiment of the present invention, the rotation shaft 3122 is interference-fitted to the gear hole of the driven gear center, so as to achieve connection fixation of the rotation shaft 3122 and the driven gear.
Optionally, as shown in fig. 5 and 6, the inner support body includes a mounting plate 3121 disposed parallel to the rotation shaft 3122, the laser ranging module 33 is fixed on the mounting plate 3121, and the first laser ranging module, the second laser ranging module, and the third laser ranging module are disposed on the mounting plate 3121 in a linear arrangement.
Optionally, the bolt detecting device 3 further comprises a fixing bracket 32, the outer bracket 311 is fixedly arranged on the fixing bracket 32, and the fixing bracket 32 is supported and fixed on the lining board 1. Alternatively, the fixing bracket 32 may be a tripod to ensure stability of the entire bolt detecting apparatus 3.
Optionally, the fixing bracket 32 includes at least three legs, and friction plates or rubber pads are arranged at the bottoms of the legs to increase friction between the fixing bracket 32 and the inner lining plate 1, so as to further ensure stability of the fixing bracket 32. Optionally, a positioning hole for installing and positioning the fixing bracket 32 is formed on the inner lining plate 1, so that the installation and positioning of the bolt detection device 3 are facilitated, and the efficiency is improved.
Optionally, the laser ranging module 33 in the embodiment of the present invention includes three laser rangefinders disposed side by side; or, the laser ranging module is a laser ranging instrument, and the laser ranging instrument is provided with three laser emitting parts which are arranged side by side.
Optionally, in the embodiment of the present invention, the analysis processing module includes a data processing unit and a comparison analysis unit, where the data processing unit is configured to perform data processing on the distance information measured by the laser ranging module 33, and the comparison analysis unit is configured to compare the size of the distance information after the judgment processing, analyze and judge the missing or damaged condition of the bolt 2, and mark the bolt 2 at the missing part, so as to facilitate the subsequent statistics work.
Optionally, in the embodiment of the present invention, the analysis processing module is a computer device, and the bolt detection apparatus 3 further includes a data storage module, and the data measured by the laser ranging module 33 may be imported into the computer device through the data storage module.
In the present invention, the one-turn bolt 2 is provided in the circumferential direction of the lining plate 1 as an example, and two or more-turn bolts 2 may be provided at intervals in the lining plate 1. As shown in fig. 2 to 5, when two bolts 2 are provided on the lining board 1, when the bolt detection device 3 detects the missing condition of the first bolts 2, the fixing bracket 32 is moved so that the first laser ranging module corresponds to the second bolts 2, and the missing condition of the second bolts 2 is detected.
Optionally, the pipeline in the embodiment of the invention is a large steel pipe.
Example 2
Referring to fig. 1 to 7, an embodiment of the present invention provides an inspection method of the large diameter pipe lining fixing bolt inspection system according to any one of the above embodiments, the inspection method includes the following steps:
s101, acquiring first distance information O between a first laser ranging module and a bolt 2 at a preset bolt position 11 on the inner lining plate 1 1 A；
S102, acquiring second distance information O between the second laser ranging module and the lining plate 1 of the non-bolt installation area at the periphery of the preset bolt position 11 2 B；
S103, if it is judged that O 1 A＞O 2 B, deducing that the bolt 2 at the preset bolt position 11 is missing; if it is judged that O 2 B＞O 1 A＞O 2 B-t, where t is the normal thickness of the undamaged bolt cap, it can be inferred that the bolt cap at the preset bolt position 11 is damaged.
In the above inspection method, when the bolt 2 of the preset bolt position 11 is missing, the bolt hole of the position is penetrated, so that O will occur 1 A＞O 2 B; when the bolt cap is damaged, the thickness of the bolt cap is correspondingly reduced, and O is generated 2 B＞O 1 A＞O 2 B-t. According to the embodiment of the invention, the distance between the positions of the bolts 2 on the lining plate 1 and the non-bolt installation area is measured and compared by a laser ranging method to determine whether the bolts 2 are missing or damaged, the measured data are stored, and the positions and the number of the missing or damaged bolts 2 are marked, so that the efficiency of subsequent processing is improved.
Optionally, in an embodiment of the present invention, the inspection method further includes the steps of:
s201, controlling the laser ranging module 33 to rotate at a constant speed for one circle from a set starting point, and recording the rotation angle;
s202, acquiring first distance information between a first laser ranging module and each preset bolt position 11 on the circumference of the inner lining plate 1 and second distance information between a second laser ranging module and the inner lining plate 1 on the circumference of each preset bolt position 11;
s203, obtaining the defect condition of the bolt 2 of each preset bolt position 11 by comparing the first distance information and the second distance information;
s204, counting and storing the number and positions of the missing bolts 2.
In the above inspection method, the inner bracket 312 is driven to rotate one circle from the set starting point by the stepping motor 313, so that the laser ranging module 33 is driven to scan the bolts 2 of one circle of the lining plate 1, and the defect condition of the bolts 2 in the circumferential direction of the lining plate 1 is inspected.
Optionally, in an embodiment of the present invention, the inspection method further includes the steps of:
S3O1, acquiring second distance information O between the second laser ranging module and the third laser ranging module and the lining plate 1 of the non-bolt installation area at two sides of the preset bolt position 11 2 B and third distance information O 3 C；
S3o2:set reference distance l= (O) 2 B+O 3 C) Comparing the first distance information O 1 The size of A and the reference distance L;
S3O3 if judging O 1 A > L, the absence of the bolt 2 at the predetermined bolt position 11 can be deduced; if it is judged that L > O 1 A > L-t, it can be inferred that the cap of the predetermined bolt at the predetermined bolt position 11 is damaged.
In the above inspection method, O 1 A、O 2 B、O 3 C is the length measured by the first laser ranging module, the second laser ranging module and the third laser ranging module respectively, O 1 A is aligned with the bolt loop region 12, O 2 B、O 3 And C, in the non-bolt installation areas on the two sides of the bolt loop line area 12, controlling the stepping motor 313 and the speed reducer to drive the inner bracket 312 to slowly rotate, so as to drive the laser ranging module 33 to rotate.
Due to O in the bolt-free region 1 A、O 2 B、O 3 C parallel, measure distance O 1 A＝O 2 B＝O 3 C, setting a reference distance l= (O) when the bolt 2 is present in the region 2 B+O 3 C) And/2, if L > O is determined 1 A is larger than L-t, the bolt cap at the position is missing, and t is the thickness of the bolt cap. Since the diameter of the pipeline is large and measured in meters, the thickness of the bolt cap is measured in millimeters, and the measurement angle deviation can be ignored through calculation accuracy setting. If it is judged that O 1 A > L, it can be deduced that the bolt 2 at the preset bolt position 11 is missing, and the missing part site is marked by a computer.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the various aspects of the invention will be apparent to persons of ordinary skill in the art upon reading the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (9)
1. The utility model provides a major diameter pipeline inside lining fixing bolt inspection system which characterized in that, includes the interior welt that passes through the bolt fastening on the pipeline inner wall and sets up the bolt detection device in the pipeline, the bolt detection device includes:
the laser ranging module comprises a first laser ranging module and a second laser ranging module which are arranged in a linear arrangement along the central axis direction of the pipeline;
wherein: the first laser ranging module is suitable for measuring first distance information between the first laser ranging module and a bolt at a preset bolt position on the inner lining plate;
the second laser ranging module is suitable for measuring second distance information between the second laser ranging module and the inner lining plate of the non-bolt installation area at the periphery of the preset bolt position;
the analysis processing module is used for comparing and analyzing the first distance information and the second distance information and deducing whether the bolt at the preset bolt position is missing or damaged according to the analysis result;
the inner lining plate is of a cylindrical structure fixed on the inner peripheral wall of the pipeline, the bolts comprise a plurality of bolts, and the bolts are arranged at intervals along the circumferential direction of the inner lining plate;
the bolt detection device further comprises a rotary supporting seat, and the rotation axis of the rotary supporting seat is parallel to the central axis of the pipeline;
the first laser ranging module and the second laser ranging module are fixedly arranged on the rotary supporting seat and are suitable for detecting the defect condition of the bolt on the whole circumference of the lining plate along with the rotation of the rotary supporting seat.
2. The large diameter pipe lining set screw inspection system of claim 1, wherein the laser ranging module further comprises:
the third laser ranging module and the second laser ranging module are distributed on two sides of the first laser ranging module along the axial direction of the pipeline;
and the distance between the optical axis of the third laser ranging module and the optical axis of the second laser ranging module is greater than the maximum radial length of the bolt cap.
3. The large diameter pipe lining set screw inspection system of claim 1 or 2, wherein the swivel support base comprises:
the outer bracket is fixedly arranged on the inner lining plate;
the inner bracket is rotatably arranged on the outer bracket, and the laser ranging module is fixedly arranged on the inner bracket;
the driving mechanism is suitable for driving the inner bracket to rotate so as to realize that the laser ranging module detects the defect condition of the bolt on the whole circumference of the inner lining plate.
4. The large diameter pipe lining set bolt inspection system of claim 3, wherein the inner bracket comprises:
an inner bracket main body;
the inner bracket main body is rotatably connected with the outer bracket through the rotating shaft, and the rotating shaft is parallel to the central axis direction of the pipeline;
the driving mechanism drives the inner bracket to rotate by driving the rotating shaft to rotate.
5. The large diameter pipe lining set bolt inspection system of claim 3, wherein the drive mechanism comprises:
the stepping motor is arranged on the outer bracket;
the gear transmission assembly comprises a driving gear and a driven gear which are in transmission fit with each other, the driving gear is suitable for being connected with the output end of the stepping motor, and the driven gear is suitable for being fixedly connected with the rotating shaft;
the stepping motor drives the inner bracket to rotate through the gear transmission assembly.
6. The large diameter pipe lining fixing bolt inspection system of claim 4, wherein the inner bracket body comprises a mounting plate arranged in parallel with the rotation axis, the laser ranging module being fixed on the mounting plate;
the bolt detection device further comprises a fixing support, the outer support is fixedly arranged on the fixing support, and the fixing support is supported and fixed on the inner lining plate.
7. A method of inspecting a detection system for a large diameter pipe lining fixing bolt as claimed in any one of claims 1 to 6, the method comprising:
acquiring first distance information O between a first laser ranging module and a bolt at a preset bolt position on an inner lining plate 1 A. And second distance information O between the second laser ranging module and the inner lining plate of the non-bolt mounting area of the outer circumference of the preset bolt position 2 B；
If it is judged that O 1 A＞O 2 B, deducing that the bolt at the preset bolt position is missing; if it is judged that O 2 B＞O 1 A＞O 2 B-t, the damage of the bolt cap at the preset bolt position can be deduced, wherein t is the normal thickness of the undamaged bolt cap.
8. The inspection method of claim 7, further comprising the step of:
controlling the laser ranging module to rotate at a constant speed for one circle from a set starting point, and recording the rotation angle;
acquiring first distance information between the first laser ranging module and each preset bolt position in the circumferential direction of the inner lining plate and second distance information between the second laser ranging module and the inner lining plate at the periphery of each preset bolt position;
obtaining the defect condition of each preset bolt position by comparing the first distance information with the second distance information;
and counting and storing the number and positions of the missing bolts.
9. The inspection method of claim 7, further comprising the step of:
acquiring second distance information O between the second laser ranging module and the third laser ranging module and the lining plates of the non-bolt installation areas on two sides of the preset bolt position 2 B and third distance information O 3 C；
Setting a reference distance l= (O) 2 B+O 3 C) Comparing the first distance O 1 The size of A and the reference distance L;
if it is judged that O 1 A is larger than L, the missing of the bolt at the preset bolt position can be deduced; if it is judged that L > O 1 A > L-t, it can be inferred that the cap of the predetermined bolt is damaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210060056.0A CN114353672B (en) | 2022-01-19 | 2022-01-19 | System and method for checking large-diameter pipeline lining fixing bolt |
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| CN202210060056.0A CN114353672B (en) | 2022-01-19 | 2022-01-19 | System and method for checking large-diameter pipeline lining fixing bolt |
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| CN114353672A CN114353672A (en) | 2022-04-15 |
| CN114353672B true CN114353672B (en) | 2023-07-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5283548B2 (en) * | 2009-03-27 | 2013-09-04 | 川崎重工業株式会社 | Railway rail fastening looseness inspection apparatus and method |
| CN107388978A (en) * | 2017-07-17 | 2017-11-24 | 成都海光核电技术服务有限公司 | The thread measurement system and detection method of the main screw of nuclear power plant reactor container |
| CN207636057U (en) * | 2018-01-02 | 2018-07-20 | 京东方科技集团股份有限公司 | A kind of bolt looseness detection device |
| CN109461133B (en) * | 2018-08-27 | 2020-10-23 | 石家庄铁道大学 | Bridge bolt falling detection method and terminal equipment |
| CN111306011B (en) * | 2020-04-17 | 2020-09-29 | 北京天泽智云科技有限公司 | Method and system for monitoring state of bolt connecting piece of fan blade and variable-pitch bearing |
| CN112388606B (en) * | 2020-11-19 | 2022-02-18 | 上海电气集团股份有限公司 | Method and device for detecting bolt state in wind driven generator |
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