Device for detecting position of welded junction of heat supply directly-buried pipeline

Abstract

The invention relates to the technical field of pipeline welded junction detection, in particular to a heat supply directly-buried pipeline welded junction position detection device which comprises two installation assemblies with the adjustable diameter, a detection mechanism is installed between the two installation assemblies, and the detection mechanism moves in the circumferential direction along the installation assemblies and detects a welding seam. A positioning bearing mechanism is further installed between the two installation assemblies and the detection mechanism. The mounting assemblies for mounting the detection mechanism on the pipeline are mounted on the two sides of the detection mechanism, so that the two sides of the detection mechanism are kept balanced in the moving detection process, the moving stability of the detection mechanism is improved, meanwhile, the positioning bearing mechanism is mounted between the detection mechanism and the two mounting assemblies, and the detection precision is improved. The positioning and bearing mechanism is used for bearing and guiding the detection mechanism, so that the stability of the detection mechanism during detection of the weld joint during rotation is improved, and the detection mechanism is prevented from falling off from the weld joint or shaking under the action of the gravity of the detection mechanism when the detection mechanism rotates to the position below the pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline weld detection, and specifically proposes a device for detecting the position of welds in a heating direct-buried pipeline. Background Art

[0002] Direct buried heating pipelines refer to pipelines laid directly below the ground for transporting hot water or steam. The welds of direct buried heating pipelines are the key parts of pipeline connections, and their quality is directly related to the sealing and durability of the entire pipeline system. Therefore, the detection of the weld positions of direct buried heating pipelines is an important part of ensuring the safe operation and long-term stability of the pipelines.

[0003] Currently, there are also detection instruments for detecting pipeline welds, which are to set and fix the installation component on one of the pipelines, and a movable trolley is installed on the installation component. An ultrasonic flaw detection probe for circumferential detection of the weld is installed on one side of the mobile trolley through a mounting frame. The ultrasonic flaw detection probe is used to detect the sealing and welding quality of the pipeline weld.

[0004] However, when the above-mentioned detection instrument is used to detect pipeline welds, the mobile trolley and the detection probe are easily moved along the mounting assembly, and a cantilever beam state is formed because the side of the mounting frame away from the mobile trolley is not connected, and the mobile trolley and the detection probe are easy to fall under the action of their own gravity, which makes it difficult for the detection probe to accurately detect the weld, affecting the accuracy of weld detection. Summary of the invention

[0005] In view of the above problems, an embodiment of the present application provides a device for detecting the weld position of a direct-buried heating pipeline to solve the technical problems in the related art.

[0006] In order to achieve the above-mentioned purpose, an embodiment of the present application provides the following technical solution: a device for detecting the position of a weld of a direct-buried heating pipeline, wherein the weld of a direct-buried heating pipeline is a weld formed after two pipelines are welded. The detection device comprises: two installation components with adjustable diameters, which are used for pipelines of different diameters, and a detection mechanism is installed between the two installation components.

[0007] The detection mechanism moves circumferentially along the installation assembly and detects the weld, and a positioning support mechanism is also installed between the two installation assemblies and the detection mechanism.

[0008] The detection mechanism includes two mounting seats, which are slidably connected to the corresponding mounting components through a locking group. The mounting seats are equipped with a detection drive group that drives them to move along the mounting components. A fixing frame is installed between the two mounting seats, and a supporting component and two detection probes are installed on the fixing frame. The detection probe is an ultrasonic flaw detection probe, and the detection probe is made of highly wear-resistant material. When detecting the weld, the detection probe is used in conjunction with a coupling agent applied to the weld.

[0009] Each of the detection probes is connected to a detection instrument via a wire. The detection instrument includes a signal processing module and a display. The signal processing module is used to process the detection signal fed back by the detection probe and send a signal to the display; the display displays an image according to the signal sent by the signal processing module.

[0010] In one possible implementation, the detection drive group includes a mounting groove on a mounting seat, a rotating shaft is rotatably connected in the mounting groove, a walking roller is fixedly sleeved on the rotating shaft and is in rolling contact with the clamp strip, and a driving source for driving the rotating shaft is also installed in the mounting groove.

[0011] In a possible implementation, the support assembly is two supporting wheels rotatably mounted on the fixing frame to support the middle part of the fixing frame, and the two detection probes are located between the two supporting wheels.

[0012] In one possible implementation, the locking group includes an L-shaped frame installed at the four top corners of the mounting seat, the horizontal section of the L-shaped frame is slidably connected to a sliding member, the sliding member is rotatably connected to a locking roller that is tightly pressed against the side wall in the width direction of the clamp strip, the L-shaped frame is rotatably connected to a screw rod, and the screw rod is connected to the sliding member by threaded cooperation.

[0013] In one possible implementation, the installation component is a clamp strip, which is wrapped around the outer wall of the pipe and tightly attached to the outer wall of the pipe to form an annular structure. The clamp strip can be unfolded so that it can be sleeved on the outer wall of the pipe. The two ends of the clamp strip are fixed by fastening components, and a gasket is installed in the middle of the inner ring surface where the clamp strip is in contact with the outer wall of the pipe.

[0014] The positioning and supporting mechanism includes two connecting bars, which are respectively located on both sides of the fixing frame arranged along its width direction. The end surface of the mounting seat away from the mounting assembly is detachably connected to the two connecting bars through the connecting frame. The connecting bar is slidably connected to the two mounting assemblies through two locking guide groups symmetrically arranged along its length direction. The middle part of the connecting bar is in contact with the weld through a positioning card abutment group. The side wall of the connecting frame located on the mounting seat is connected to the middle part of the connecting bar through an oblique connecting rod. A supporting group for supporting the fixing frame is commonly installed in the middle parts of the two connecting bars.

[0015] In one possible implementation, the locking guide group includes a holder installed on the connecting strip, the holder is rotatably connected to a resistance roller at the end face of the holder close to the clamp strip, two symmetrically arranged sliding grooves are provided on the holder, an inverted clamp plate is slidably connected in the sliding groove, the resistance roller is located between the two corresponding clamp plates, the opposite surfaces of the vertical sections of the two clamp plates are rotatably connected to the clamp rollers, and the holder is also equipped with a locking drive component for driving the two clamp plates to move and to resist the two side walls in the width direction of the clamp strip.

[0016] In one possible implementation, the supporting group includes a transverse fixing frame connected to two connecting strips by screws, the transverse fixing frame is a strip plate structure with a raised middle portion, a supporting frame is installed in the middle portion of the fixed frame away from the end surface of the pipeline, and evenly arranged supporting push spring rods are installed in the middle portion of the transverse fixing frame. The transverse fixing frame is elastically pressed against the supporting frame by the supporting push spring rods.

[0017] In one possible implementation, slots are installed on the opposing surfaces of the two mounting seats, plug-in strips are installed on both sides of the middle portion of the support bracket along its width direction, a storage groove is provided at one end of the plug-in strip away from the support bracket, an insertion plate is slidably installed on the storage groove through a supporting spring, and the insertion plate is plugged into the slot.

[0018] In one possible implementation, the positioning abutment group includes an inverted abutment seat installed on one side of the connecting strip close to the pipe, and the end faces of the two vertical sections of the abutment seat are both equipped with balls that roll in contact with the outer wall of the pipe, and a positioning component is installed between the two vertical sections of the abutment seat.

[0019] In one possible implementation, the positioning assembly includes spring grooves formed on opposite surfaces of two vertical sections of the latch seat, a push rod is slidably installed in the spring groove via a push spring, and balls are installed on opposite surfaces of the two push rods.

[0020] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. The present invention has installation components installed on both sides of the detection mechanism for installing it on the pipeline, so that the detection mechanism can maintain balance on both sides during the mobile detection process, thereby improving the stability of the movement of the detection mechanism. At the same time, a positioning support mechanism is installed between the detection mechanism and the two installation components. The positioning support mechanism is used to support and guide the detection mechanism, which not only improves the stability of the detection mechanism when rotating to detect the weld, but also avoids the detection mechanism from falling under its own gravity and separating from the weld or shaking when it rotates to the bottom of the pipeline, resulting in reduced accuracy in pipeline weld detection.

[0021] 2. The connecting strip in the present invention not only guides the movement of the mounting seat through the two locking guide groups connected thereto, but also forms a triangular structure with the oblique connecting rod and the connecting frame, thereby further improving the stability of the detection mechanism during movement. Moreover, the supporting group can also elastically push the detection mechanism to prevent the detection mechanism from falling under its own gravity when it moves to the bottom of the pipeline, thereby affecting the detection accuracy.

[0022] 3. The present invention uses two positioning card abutment groups to align with the weld and roll against the weld, thereby positioning the distance between the installation component and the weld, and the positioning effect of the locking guide group on which the installation component is slidably connected improves the circularity of the installation component when it is installed on the pipeline, avoids the deviation of the installation component, and further improves the accuracy of pipeline weld detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0025] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0026] Figure 3 It is a structural schematic diagram of the installation assembly, the detection mechanism and the positioning support mechanism of the present invention.

[0027] Figure 4 It is a structural schematic diagram of the installation assembly and the positioning support mechanism of the present invention.

[0028] Figure 5 It is a schematic cross-sectional structural diagram of the positioning and supporting mechanism of the present invention.

[0029] Figure 6 It is a structural schematic diagram of the slot, the plug-in strip, the plug-in board and the supporting spring of the present invention.

[0030] Figure 7 It is a partial three-dimensional structural schematic diagram of the detection mechanism of the present invention.

[0031] Figure numerals: 1, pipeline; 2, weld; 3, installation assembly; 30, gasket; 4, detection mechanism; 40, mounting seat; 401, slot; 402, plug strip; 403, plug plate; 404, support spring; 41, locking group; 410, L-shaped frame; 411, sliding member; 412, locking roller; 413, screw; 42, detection drive group; 420, mounting slot; 421, rotating shaft; 422, walking roller; 43, fixed frame; 44, detection probe ; 45. Support assembly; 5. Positioning support mechanism; 50. Connecting frame; 51. Locking guide group; 510. Card seat; 511. Resistance roller; 512. Card clamping plate; 513. Resistance roller; 514. Locking drive assembly; 52. Positioning card resistance group; 520. Card resistance seat; 521. Resistance rod; 522. Push spring; 53. Oblique connecting rod; 54. Support group; 540. Transverse fixed frame; 541. Support frame; 542. Support and push spring rod; 55. Connecting strip. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] See also Figure 1 A device for detecting the position of a weld of a direct-buried heating pipeline. The weld of the direct-buried heating pipeline is a weld 2 formed after two pipelines 1 are welded. The detection device includes: two installation components 3 with adjustable diameters. The installation components 3 are used for pipelines 1 with different diameters. A detection mechanism 4 is installed between the two installation components 3.

[0035] See also Figure 1 The detection mechanism 4 moves circumferentially along the installation component 3 and detects the weld 2. A positioning and supporting mechanism 5 is also installed between the two installation components 3 and the detection mechanism 4.

[0036] See also Figure 1 and Figure 3 The installation component 3 is a clamp strip, which is wound around the outer wall of the pipe 1 and tightly attached to the outer wall of the pipe 1 to form an annular structure. The clamp strip can be unfolded, and the unfolded setting of the clamp strip can be easily sleeved on the outer wall of the pipe 1. The two ends of the clamp strip are fixed by fastening components, and a gasket 30 is installed in the middle of the inner ring surface where the clamp strip fits the outer wall of the pipe 1.

[0037] The fastening assembly for connecting and fixing the two ends of the clamp strip is an existing structure. The gasket 30 connected to the clamp strip is used to increase the distance between the clamp strip and the pipeline 1 on both sides along its width direction, so as to facilitate the sliding connection between the detection mechanism 4 and the positioning support mechanism 5 and the clamp strip.

[0038] See also Figure 1 , Figure 2 , Figure 3 and Figure 7 The detection mechanism 4 includes two mounting seats 40, which are slidably connected to the corresponding mounting components 3 through a locking group 41. A detection driving group 42 is installed on the mounting seat 40 to drive it to move along the mounting component 3. A fixing frame 43 is installed between the two mounting seats 40, and a supporting component 45 and two detection probes 44 are installed on the fixing frame 43; the detection probe 44 is an ultrasonic flaw detection probe, and the detection probe 44 is made of highly wear-resistant material. The detection probe 44 is used in conjunction with a coupling agent applied to the weld 2 when detecting the weld 2.

[0039] Each of the detection probes 44 is connected to a detection instrument via a wire. The detection instrument includes a signal processing module and a display. The signal processing module is used to process the detection signal fed back by the detection probe 44 and send a signal to the display; the display displays an image according to the signal sent by the signal processing module (the above are all existing technologies and are not shown in the figure).

[0040] During detection, the detection mechanism 4 and the positioning support mechanism 5 are installed on the outer walls of the two pipes 1 through the installation component 3, and the two detection probes 44 are aligned with the two sides of the weld 2 respectively. The weld 2 of the pipe 1 is coated with a coupling agent used in conjunction with the detection probe 44. Then, the mounting seat 40 is driven by the detection drive group 42 to perform circular motion along the installation component 3, and the positioning support mechanism 5 guides and supports the circular motion of the detection mechanism 4. During this process, the detection probe 44 detects the weld 2.

[0041] During the rotation of the detection mechanism 4, the support and guidance of the detection mechanism 4 by the positioning support mechanism 5 not only improves the stability of the detection mechanism 4 when it rotates to detect the weld 2, but also avoids the detection mechanism 4 from falling under its own gravity and becoming separated from the weld 2 or shaking when the detection mechanism 4 rotates to the bottom of the pipeline 1, resulting in reduced accuracy in the detection of the weld 2.

[0042] See also Figure 1 , Figure 3 and Figure 6The detection drive group 42 includes a mounting groove 420 provided on the mounting seat 40, a rotating shaft 421 is rotatably connected in the mounting groove 420, a walking roller 422 which is in rolling contact with the clamp strip is fixedly sleeved on the rotating shaft 421, and a driving source (such as an electric motor) for driving the rotating shaft 421 to rotate is also installed in the mounting groove 420, and the driving source is not shown in the figure.

[0043] The driving source drives the rotating shaft 421 to drive the walking roller 422 to rotate. The walking roller 422 rotates through the friction between it and the clamp strip and drives the mounting seat 40 to move along the clamp strip, thereby realizing the circumferential movement of the detection mechanism 4 along the clamp strip to detect the circumferential direction of the weld 2.

[0044] Referring to FIG. 7 , the support assembly 45 is two supporting wheels rotatably mounted on the fixing frame 43 to support the middle part of the fixing frame 43 . The supporting wheels are used to increase the supporting force of the fixing frame 43 . The two detection probes 44 are located between the two supporting wheels.

[0045] See also Figure 1 , Figure 2 and Figure 3 The locking group 41 includes an L-shaped frame 410 installed at the four top corners of the mounting seat 40, the horizontal section of the L-shaped frame 410 is slidably connected with a sliding member 411, the sliding member 411 is rotatably connected with a locking roller 412 that is tightly pressed against the side wall in the width direction of the clamp strip, and the L-shaped frame 410 is rotatably connected with a screw rod 413, which is connected to the sliding member 411 by threaded cooperation.

[0046] The sliding member 411 drives the locking roller 412 to press against the side wall of the clamp strip by rotating the screw rod 413, thereby realizing a sliding connection between the mounting seat 40 and the clamp strip, so as to facilitate the detection drive group 42 to drive the mounting seat 40 to move stably along the clamp strip.

[0047] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The positioning and supporting mechanism 5 includes two connecting bars 55, which are respectively located on both sides of the fixing frame 43 arranged along its width direction, that is, the two mounting seats 40 are located between the two connecting bars 55, and the end surface of the mounting seat 40 away from the mounting assembly 3 is detachably connected to the two connecting bars 55 through the connecting frame 50, and the connecting bar 55 is slidably connected to the two mounting assemblies 3 through two locking guide groups 51 symmetrically arranged along its length direction. The middle part of the connecting bar 55 is in contact with the weld 2 through the positioning card group 52, and the side wall of the connecting frame 50 located on the mounting seat 40 is connected to the middle part of the connecting bar 55 through an oblique connecting rod 53, and the middle part of the two connecting bars 55 is jointly installed with a supporting group 54 for supporting the fixing frame 43.

[0048] The connecting frame 50 and the oblique connecting rod 53 can be replaced according to the diameter of the pipeline 1 to be detected, so that the detection device is suitable for detecting pipelines 1 with different diameters.

[0049] When the mounting component 3 is installed on the outer wall of the pipe 1, the positioning card group 52 is aligned with the weld 2 and rolled against the two sides of the weld 2, so as to position the distance between the mounting component 3 and the weld 2. The positioning function of the locking guide group 51 also improves the circularity of the mounting component 3 when the clamp is installed on the pipe 1, avoiding the deviation of the mounting component 3 and affecting the accuracy of the detection of the weld 2 by the detection mechanism 4.

[0050] The connecting strip 55 not only guides the movement of the mounting base 40 through the two locking guide groups 51 connected thereto, but also forms a triangular structure with the oblique connecting rod 53 and the connecting frame 50, thereby further improving the stability of the detection mechanism 4 during movement. Moreover, the supporting group 54 can also elastically push the detection mechanism 4 to prevent the detection mechanism 4 from falling under its own gravity when it moves to the bottom of the pipeline 1, thereby affecting the detection accuracy.

[0051] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 The locking guide group 51 includes a base 510 installed on the connecting strip 55, and the base 510 is rotatably connected to a resistance roller 511 near the end face of the clamping strip. The base 510 is provided with two symmetrically arranged sliding grooves, and an inverted clamping plate 512 is slidably connected in the sliding groove. The resistance roller 511 is located between the two corresponding clamping plates 512, and the opposite surfaces of the vertical sections of the two clamping plates 512 are rotatably connected to the clamping rollers 513. The base 510 is also equipped with a locking drive component 514 that drives the two clamping plates 512 to move and contact the two side walls in the width direction of the clamping strip. The locking drive component 514 can be a bidirectional threaded rod, and the bidirectional threaded rod is connected to the two clamping plates 512 by threaded matching.

[0052] The clamping seat 510 is slidably installed on the clamping strip by clamping the clamping strip with two clamping plates 512. The entire clamping plate 512 is rollingly connected to the side wall of the clamping strip through the clamping roller 513, so that the mounting seat 40 drives the connecting strip 55 and the clamping seat 510 to move along the circumference of the clamping strip.

[0053] See also Figure 2 , Figure 3 , Figure 4 and Figure 7The supporting group 54 includes a transverse fixing frame 540 connected to two connecting strips 55 by screws. The transverse fixing frame 540 is a strip plate structure with a raised middle portion. A supporting frame 541 is installed at the middle portion of the fixing frame 43 away from the end surface of the pipeline 1. Evenly arranged supporting push spring rods 542 are installed at the middle portion of the transverse fixing frame 540. The transverse fixing frame 540 is elastically pressed against the supporting frame 541 through the supporting push spring rods 542.

[0054] The transverse fixing frame 540 can be replaced according to the diameter of the pipeline 1 to be detected, so that the detection device is suitable for detecting pipelines 1 with different diameters.

[0055] When the detection mechanism 4 rotates to the bottom of the pipeline 1, the falling distance of the detection mechanism 4 is shortened due to the connection and support of the connecting strips 55 on both sides thereof. At the same time, the cross-fixing frame 540 between the two connecting strips 55 presses the supporting frame 541 through the elastic force of the supporting spring rod 542. The supporting frame 541 supports the fixing frame 43 so that the detection probe 44 always keeps in contact with the weld 2 for stable detection, thereby improving the accuracy of the detection device in detecting the weld 2.

[0056] See also Figure 1 , Figure 2 , Figure 3 and Figure 6 , slots 401 are installed on the opposite surfaces of the two mounting seats 40, and plug-in strips 402 are installed on both sides of the middle part of the supporting bracket 541 along its width direction. A storage groove is opened at the end of the plug-in strip 402 away from the supporting bracket 541, and a plug-in plate 403 is slidably installed on the storage groove through a supporting spring 404, and the plug-in plate 403 is plugged into the slot 401.

[0057] A shift plate that slides through the storage slot is installed on the plug-in strip 402, and the shift plate is used to push the plug-in board 403 to move into the storage slot, so that the plug-in board 403 can be aligned with the slot 401 and plugged in under the action of the rebound force of the support spring 404, so that the support bracket 541 and the mounting base 40 support each other, further preventing the mounting base 40 from falling under the action of its own gravity.

[0058] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 The positioning card group 52 includes an inverted card seat 520 installed on one side of the connecting strip 55 close to the pipeline 1, and the end faces of the two vertical sections of the card seat 520 are both installed with ball bearings that are in rolling contact with the outer wall of the pipeline 1, and a positioning component is installed between the two vertical sections of the card seat 520; the positioning component includes spring grooves opened on the opposite surfaces of the two vertical sections of the card seat 520, and a push rod 521 is slidably installed in the spring groove through a push spring 522, and the opposite surfaces of the two push rods 521 are both installed with ball bearings.

[0059] When the stop seat 520 is stuck on the weld 2, the weld 2 is located between the two vertical sections of the stop seat 520. Under the action of the push spring 522, the push rod 521 contacts the weld 2 through the ball connected thereto, thereby positioning the distance between the weld 2 and the clamp strip, so as to facilitate the alignment of the detection probe 44 and the weld 2 for detection. The ball connected to the vertical section of the stop seat 520 and the ball connected to the push rod 521 are both used to reduce the friction between the stop seat 520 and the pipeline 1 and the weld 2 during movement.

[0060] It is particularly noted that both the clamping roller 513 and the locking roller 412 are provided with annular grooves, and the side walls of the clamping strip are clamped in the annular grooves (not shown in the figure) to prevent the clamping roller 513 and the locking roller 412 from axial movement.

[0061] See also Figure 1-Figure 7 When working, the clamp strip is unfolded and sleeved on the outer wall of the pipe 1, and the positioning support mechanism 5 is clamped on the weld 2 of the pipe 1 to locate the distance between the two clamp strips and the weld 2 and the circumference of the clamp strip sleeve. Then, the two ends of the clamp strip are fixed by the fastening assembly. At the same time, the detection mechanism 4 and the positioning support mechanism 5 are also installed on the outer walls of the two pipes 1, and the two detection probes 44 are aligned with the two sides of the weld 2 respectively. The weld 2 of the pipe 1 is coated with a coupling agent used in conjunction with the detection probe 44, and then the mounting seat is driven by the detection drive group 42 40 performs circular motion along the mounting assembly 3, and the positioning support mechanism 5 guides and supports the circular motion of the detection mechanism 4. During this process, the detection probe 44 detects the weld 2. During the rotation of the detection mechanism 4, the positioning support mechanism 5 not only supports and guides the detection mechanism 4, thereby improving the stability of the detection mechanism 4 when rotating to detect the weld 2, but also avoids the detection mechanism 4 from falling under its own gravity and separating from the weld 2 or shaking when the detection mechanism 4 rotates to the bottom of the pipeline 1, resulting in reduced detection accuracy of the weld 2.

[0062] When the detection probe 44 detects defects in the weld 2, the detection probe 44 feeds back a signal, which is transmitted to the processing module. The signal processing module processes the signal fed back by the detection probe 44, and the signal processing module sends a signal to the display. The display displays an image according to the signal sent by the signal processing module. The staff judges and processes the situation of the defects in the weld 2 according to the image displayed on the display.

[0063] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0064] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for detecting the position of a weld of a direct buried heating pipeline, wherein the weld of the direct buried heating pipeline is a weld formed after two pipelines are welded, and the detection device comprises: Two mounting components with adjustable diameters are used for pipes with different diameters, and the characteristic is that a detection mechanism is installed between the two mounting components; The detection mechanism moves circumferentially along the installation assembly and detects the weld, and a positioning support mechanism is also installed between the two installation assemblies and the detection mechanism; The detection mechanism includes two mounting seats, which are slidably connected to the corresponding mounting components through a locking group, and a detection drive group is installed on the mounting seat to drive it to move along the mounting component. A fixing frame is installed between the two mounting seats, and a support component and two detection probes are installed on the fixing frame; The positioning and supporting mechanism includes two connecting bars, which are respectively located on both sides of the fixing frame arranged along its width direction. The end surface of the mounting seat away from the mounting assembly is detachably connected to the two connecting bars through the connecting frame. The connecting bar is slidably connected to the two mounting assemblies through two locking guide groups symmetrically arranged along its length direction. The middle part of the connecting bar is in contact with the weld through a positioning card abutment group. The side wall of the connecting frame located on the mounting seat is connected to the middle part of the connecting bar through an oblique connecting rod. A supporting group for supporting the fixing frame is commonly installed in the middle parts of the two connecting bars.

2. According to claim 1, a device for detecting the weld position of a direct buried heating pipeline is characterized in that: The installation component is a clamp strip, which is wrapped around the outer wall of the pipe and tightly attached to the outer wall of the pipe to form an annular structure. The clamp strip can be unfolded so that it can be sleeved on the outer wall of the pipe. The two ends of the clamp strip are fixed by fastening components, and a gasket is installed in the middle of the inner ring surface where the clamp strip fits the outer wall of the pipe.

3. According to claim 1, a device for detecting the weld position of a direct buried heating pipeline is characterized in that: The locking guide group includes a card seat installed on the connecting strip, the card seat is rotatably connected to a resistance roller near the end face of the clamping strip, two symmetrically arranged sliding grooves are provided on the card seat, an inverted clamping plate is slidably connected in the sliding groove, the resistance roller is located between the two corresponding clamping plates, the opposite surfaces of the vertical sections of the two clamping plates are rotatably connected to the clamping rollers, and a locking drive component is also installed on the card seat to drive the two clamping plates to move and contact the two side walls in the width direction of the clamping strip.

4. According to claim 1, a device for detecting the weld position of a direct buried heating pipeline is characterized in that: The supporting group includes a transverse fixing frame connected to two connecting strips by screws, the transverse fixing frame is a strip plate structure with a raised middle part, a supporting frame is installed in the middle part of the fixing frame away from the end face of the pipeline, and evenly arranged supporting push spring rods are installed in the middle part of the transverse fixing frame. The transverse fixing frame is elastically pressed against the supporting frame through the supporting push spring rods.

5. According to claim 1, a device for detecting the weld position of a direct buried heating pipeline is characterized in that: The positioning abutment group includes an inverted abutment seat installed on one side of the connecting strip close to the pipeline, and the end faces of the two vertical sections of the abutment seat are both equipped with balls that roll in contact with the outer wall of the pipeline, and a positioning component is installed between the two vertical sections of the abutment seat.

6. According to claim 1, a device for detecting the weld position of a direct buried heating pipeline, characterized in that: The locking group includes an L-shaped frame installed at the four top corners of the mounting seat, the horizontal section of the L-shaped frame is slidably connected to a sliding member, the sliding member is rotatably connected to a locking roller that is tightly pressed against the side wall in the width direction of the clamp strip, the L-shaped frame is rotatably connected to a screw rod, and the screw rod is connected to the sliding member by threaded cooperation.

7. A device for detecting the weld position of a direct buried heating pipeline according to claim 4, characterized in that: Slots are installed on the opposite surfaces of the two mounting seats, and plug-in strips are installed on both sides of the middle part of the support frame along its width direction. A storage groove is opened at one end of the plug-in strip away from the support frame, and a plug-in plate is slidably installed on the storage groove through a supporting spring, and the plug-in plate is plugged into the slot.

8. According to claim 5, a device for detecting the weld position of a direct buried heating pipeline, characterized in that: The positioning assembly comprises spring grooves formed on opposite surfaces of two vertical sections of the card stop seat, a stop rod is slidably installed in the spring groove through a push spring, and balls are installed on opposite surfaces of the two stop rods.

9. The device for detecting the weld position of a direct buried heating pipeline according to claim 1, characterized in that: The detection drive group includes a mounting groove on the mounting seat, a rotating shaft is rotatably connected in the mounting groove, a walking roller in rolling contact with the clamp strip is fixedly sleeved on the rotating shaft, and a driving source for driving the rotating shaft to rotate is also installed in the mounting groove.

10. The device for detecting the weld position of a direct buried heating pipeline according to claim 1, characterized in that: The support assembly is two supporting wheels rotatably mounted on the fixing frame to support the middle part of the fixing frame, and the two detection probes are located between the two supporting wheels.

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