A town gas pipeline quality detection device

Abstract

The present invention relates to the technical field of pipeline quality inspection, and specifically proposes a town gas pipeline quality inspection device, comprising: a mounting frame, a plurality of ultrasonic flaw detector heads, two clamp guide assemblies, a detection width adjustment mechanism and a pressure dispersion guide mechanism. The present invention cooperates with the two clamp guide assemblies and the pressure dispersion guide mechanism to limit and guide the mounting frame during its movement and to disperse the pressure, thereby avoiding the problem that the ultrasonic flaw detector head is offset along the axial direction of the pipeline when rotating circumferentially along the outer wall of the pipeline during the process of pipeline weld quality inspection using a traditional handheld device, resulting in inaccurate pipeline weld quality inspection and excessive pressing pressure, causing scratches on the outer wall of the pipeline, and adjusting the number of ultrasonic flaw detector heads used for inspection through the detection width adjustment mechanism according to the width of the weld, thereby improving the comprehensiveness and accuracy of weld quality inspection.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline quality detection, and specifically proposes a town gas pipeline quality detection device. Background Art

[0002] Town gas pipeline is an underground or above-ground pipeline system used to transport natural gas, liquefied petroleum gas (LPG) or other combustible gases, and is widely used in gas supply to urban residents, commercial and industrial users.

[0003] The weld of the gas pipeline is the key part of the pipeline connection, and its quality is directly related to the sealing and durability of the entire pipeline system. Therefore, the quality inspection of the weld position of the gas pipeline is an important link to ensure the safe operation and long-term stability of the pipeline.

[0004] After the pipeline welding is completed, the protrusions at the weld are polished and coated with coupling agent, and then the pipeline weld is inspected by a handheld pipeline weld inspection device. However, the following problems are prone to occur during the inspection process: 1. When the traditional handheld pipeline quality inspection device moves along the circumference of the pipeline weld for inspection, it is easy to move along the axial direction of the pipeline, resulting in inaccurate pipeline weld quality inspection; 2. Due to different welding methods, the weld widths between pipelines are different, and the existing inspection device is difficult to adjust the inspection width according to the different weld widths, making it difficult to fully inspect the pipeline weld at one time; 3. It is difficult to control the pressure inspection force of the traditional handheld quality inspection device, and it is easy to scratch the surface of the pipeline or weld during the inspection process. Summary of the invention

[0005] In view of the above problems, an embodiment of the present application provides a town gas pipeline quality detection device to solve the technical problems in the related art.

[0006] In order to achieve the above-mentioned objectives, an embodiment of the present application provides the following technical solutions: a town gas pipeline quality inspection device, comprising: a mounting frame, a plurality of ultrasonic flaw detection heads and two clamp guide assemblies, wherein the plurality of ultrasonic flaw detection heads are installed in the middle of the mounting frame through a detection width adjustment mechanism, and the detection width adjustment mechanism is used to adjust the amount of contact between the ultrasonic flaw detection head and the weld according to the width of the weld between the two pipelines.

[0007] A transfer box is also installed on the mounting frame, and multiple ultrasonic flaw detection heads are connected to the transfer box through wires. The transfer box is connected to an existing detection instrument. 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 ultrasonic flaw detection head 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 prior arts).

[0008] Both ends of the mounting frame are slidably connected with a slide seat through an elastic support group. The mounting frame moves along the radial direction of the pipeline through the sliding cooperation between the elastic support group and the slide seat. The two slide seats are slidably cooperated with two clamp guide assemblies respectively, and the clamp guide assemblies are used to limit and guide the slide seat.

[0009] The pressure dispersion guide mechanism is connected with the two slide seats and the mounting frame, and is used for dispersively controlling the mounting frame to drive the ultrasonic flaw detection head to press against the weld.

[0010] In one possible implementation, the clamp guide assembly is an expandable clamping strip structure, the diameter of the clamp guide assembly is adjustable, the clamp guide assembly is wrapped around the pipe and tightly adheres to the outer wall of the pipe to form an annular structure, and a guide groove is provided on the side wall of the clamp guide assembly away from the pipe.

[0011] The detection width adjustment mechanism includes a push-down handle installed on a side of the mounting frame away from the pipeline. Except for one ultrasonic flaw detection head fixedly installed on a side of the mounting frame close to the pipeline, the other ultrasonic flaw detection heads are connected to the mounting frame through an elastic supplementary pressure group sliding along the radial direction of the pipeline. A latch assembly for locking the elastic supplementary pressure group is installed on the push-down handle. When the elastic supplementary pressure group cooperates with the corresponding latch assembly, the corresponding ultrasonic flaw detection head is pressed against the weld when the mounting frame moves along the radial direction of the pipeline.

[0012] In one possible implementation, the elastic support group includes a spring groove opened on the slide seat, and an L-shaped seat is fixedly installed at the end of the mounting frame arranged along its length direction. The L-shaped seat is slidably connected to the spring groove, and a support spring is installed between the L-shaped seat and the spring groove.

[0013] In one possible implementation, the elastic supplementary pressure group includes a lifting frame that slides up and down and is clamped on the mounting frame in an inverted concave structure. The lifting frame is provided with a locking hole in the middle of a section of the mounting frame that spans the side away from the pipeline. The mounting frame is provided with sliding grooves on both side walls arranged along its width direction. A push spring is installed between the lifting frame and the sliding groove, and an elastic compensation component is installed between the lifting frame and the corresponding ultrasonic flaw detection head.

[0014] In one possible implementation, the elastic compensation component includes fixed rods fixedly installed at both ends of the ultrasonic flaw detection head, slots are provided at both ends of the lifting frame, the fixed rods are slidably connected to the slots, and a push compensation spring is installed between the fixed rods and the slots.

[0015] In one possible implementation, the latch assembly includes a displacement groove formed on the end face of the pressing handle near the mounting frame, an ear plate is slidably connected to the displacement groove, a pressing locking spring is installed between the displacement groove and the ear plate, a latch rod is formed on the ear plate and plugged into the corresponding locking hole, and the end of the latch rod away from the ear plate is arc-shaped.

[0016] In one possible implementation, the pressure dispersion guide mechanism includes an ear seat installed on the side of the slide away from the clamp guide assembly, the ear seat is provided with a guide slide groove symmetrically arranged along its length direction, a support frame that slides up and down is connected in the guide slide groove, a return spring is installed between the support frame and the guide slide groove, two support frames connected to the same ear seat are arranged in an eight-shaped shape, and their large openings face one side of the ultrasonic flaw detection head, and a fixed seat is commonly installed at the opposite ends of the two support frames located on the same side of the width direction of the mounting frame, a support roller that is rotatably connected to the fixed seat and is in rolling contact with the outer wall of the pipe, and lower pressure strips are installed on both sides of the middle part of the mounting frame arranged along its width direction, and the end of the lower pressure strip away from the mounting frame contacts the fixed seat.

[0017] In one possible implementation, the mounting frame, the lower pressing bar and the supporting frame form a triangle.

[0018] In a possible implementation, both sides of the mounting frame arranged along the width direction thereof are equipped with connecting frames symmetrically arranged along the length direction thereof by bolts, and the connecting frames are rotatably connected to supporting rollers.

[0019] In a possible implementation, four supplementary pressure plates arranged in a rectangular shape are mounted on the mounting frame, and the supplementary pressure plates are used to press against one end of the support frame close to the slide seat when the mounting frame moves toward the pipeline.

[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 cooperates with the pressure dispersion guide mechanism through two clamp guide assemblies to limit and guide and disperse the pressure during the movement of the mounting frame, thereby avoiding the problem that when the ultrasonic flaw detection head rotates circumferentially along the outer wall of the pipeline during the process of pipeline weld quality inspection using traditional handheld devices, the ultrasonic flaw detection head is offset along the axial direction of the pipeline, resulting in inaccurate pipeline weld quality inspection and excessive pressing pressure, causing scratches on the outer wall of the pipeline. The number of ultrasonic flaw detection heads used for inspection is adjusted by the inspection width adjustment mechanism according to the width of the weld, thereby improving the comprehensiveness and accuracy of weld quality inspection.

[0021] 2. When the mounting bracket in the present invention drives the ultrasonic flaw detection head fixedly connected thereto to press against the weld, the other required corresponding ultrasonic flaw detection heads can be tightly attached to the weld under the elastic force of the push compensation spring, thereby avoiding the problem of inconsistent roundness of the weld surface, which makes it difficult for the adjusted ultrasonic flaw detection head to accurately attach to the weld for detection, thereby reducing the accuracy of pipeline weld detection, and further improving the accuracy of pipeline quality detection.

[0022] 3. The elastic supplementary pressing group in the present invention cooperates with the corresponding latch assembly to realize the rapid adjustment of the number of ultrasonic flaw detection heads, thereby improving the convenience 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 It is a schematic diagram of the three-dimensional structure of the quality inspection device of the present invention after removing two clamp guide components.

[0026] Figure 3 It is a first three-dimensional structural schematic diagram of the detection width adjustment mechanism and the pressure dispersion guide mechanism of the present invention.

[0027] Figure 4 It is a second three-dimensional structural schematic diagram of the detection width adjustment mechanism and the pressure dispersion guide mechanism of the present invention.

[0028] Figure 5 It is a schematic cross-sectional three-dimensional structural diagram of the detection width adjustment mechanism of the present invention.

[0029] Figure 6 It is a schematic cross-sectional view of the ear plate, the pressing locking spring and the locking rod of the present invention.

[0030] 1. Mounting frame; 10. Support roller; 11. Supplementary pressure plate; 2. Ultrasonic flaw detection head; 3. Clamp guide assembly; 30. Guide groove; 4. Detection width adjustment mechanism; 40. Pressing handle; 41. Elastic supplementary pressure group; 410. Lifting frame; 411. Push spring; 412. Fixed rod; 413. Push compensation spring; 42. Lock assembly; 420. Ear plate; 421. Pressure locking spring; 422. Lock rod; 5. Elastic support group; 50. L-shaped seat; 51. Support spring; 6. Sliding seat; 7. Pressure dispersion guide mechanism; 70. Ear seat; 71. Support frame; 72. Reset spring; 73. Fixed seat; 74. Support roller; 75. Lower pressure strip; 8. Pipeline; 9. Weld. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] See also Figure 1 A town gas pipeline quality inspection device comprises: a mounting frame 1, a plurality of ultrasonic flaw detection heads 2 and two clamp guide assemblies 3. The plurality of ultrasonic flaw detection heads 2 are mounted on the middle of the mounting frame 1 through a detection width adjustment mechanism 4. The detection width adjustment mechanism 4 is used to adjust the amount of contact between the ultrasonic flaw detection heads 2 and the weld 9 according to the width of the weld 9 between two pipelines 8.

[0034] A transfer box is also installed on the mounting frame 1, and multiple ultrasonic flaw detection heads 2 are connected to the transfer box through wires. The connection box is connected to an existing detection instrument. 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 ultrasonic flaw detection head 2 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).

[0035] See also Figure 1 Both ends of the mounting frame 1 are slidably connected with a slide 6 through an elastic support group 5. The mounting frame 1 moves along the radial direction of the pipeline 8 through the sliding cooperation between the elastic support group 5 and the slide 6. The two slides 6 are slidably cooperated with two clamp guide assemblies 3 respectively, and the clamp guide assemblies 3 are used to limit and guide the slide 6.

[0036] See also Figure 1 , the pressure dispersion guide mechanism 7 is connected to the two slides 6 and the mounting frame 1. The pressure dispersion guide mechanism 7 is used to disperse the pressure of the mounting frame 1 to drive the ultrasonic flaw detection head 2 to press against the weld 9, so as to avoid the problem of large friction force on the weld 9 during the movement of the ultrasonic flaw detection head 2 during detection, resulting in scratches on the weld 9.

[0037] Before testing, the weld 9 is first polished to make the weld 9 and the outer wall of the pipe 8 in a flat state, and then a coupling agent is applied to the weld 9. Then, the mounting frame 1 and the ultrasonic flaw detection head 2 are fixed to the pipe 8 through the clamp guide assembly 3, so that the ultrasonic flaw detection head 2 and the weld 9 are aligned.

[0038] See also Figure 1The clamp guide assembly 3 is an expandable clamping strip structure, the diameter of the clamp guide assembly 3 is adjustable, the clamp guide assembly 3 is wrapped around the pipe 8 and tightly adheres to the outer wall of the pipe 8 to form an annular structure, and a guide groove 30 is opened on the side wall of the clamp guide assembly 3 away from the pipe 8.

[0039] When the mounting frame 1 is manually pressed and pushed to drive the slide 6 to move circumferentially along the outer wall of the pipe 8, the slide 6 slides along the guide groove 30, thereby guiding the movement of the mounting frame 1 and the ultrasonic flaw detection head 2, thereby avoiding the problem of inaccurate quality detection of the weld 9 of the pipe 8 due to the hand-controlled rotation and deviation of the ultrasonic flaw detection head 2 along the circumferential direction of the outer wall of the pipe 8 during the process of using a traditional handheld device to detect the quality of the weld 9.

[0040] See also Figure 1 and Figure 2 The detection width adjustment mechanism 4 includes a pressing handle 40 installed on the side of the mounting frame 1 away from the pipe 8. Except for one ultrasonic flaw detection head 2 fixedly installed on the side of the mounting frame 1 close to the pipe 8, the other ultrasonic flaw detection heads 2 are connected to the mounting frame 1 through an elastic supplementary pressing group 41 that slides radially along the pipe 8. A latch assembly 42 for locking the elastic supplementary pressing group 41 is installed on the pressing handle 40. When the elastic supplementary pressing group 41 cooperates with the corresponding latch assembly 42, the corresponding ultrasonic flaw detection head 2 is pressed against the weld 9 as the mounting frame 1 moves radially along the pipe 8.

[0041] When the ultrasonic flaw detection head 2 fixedly installed on the mounting frame 1 conflicts with the weld 9, the latch assembly 42 does not cooperate with the elastic supplementary pressure group 41, and the ultrasonic flaw detection head 2 connected to the elastic supplementary pressure group 41 does not contact the weld 9. When the ultrasonic flaw detection head 2 fixedly installed on the mounting frame 1 does not conflict with the weld 9, the latch assembly 42 cooperates with the elastic supplementary pressure group 41, and the ultrasonic flaw detection head 2 connected to the elastic supplementary pressure group 41 contacts the weld 9.

[0042] When the weld 9 of the pipeline 8 is wider, the required number of ultrasonic flaw detection heads 2 is adjusted according to the width of the weld 9 to be detected. During the adjustment, the elastic supplementary pressure group 41 on the ultrasonic flaw detection head 2 cooperates with the corresponding latch assembly 42, so that the required ultrasonic flaw detection head 2 is moved toward the pipeline 8 and locked in position, so that when the ultrasonic flaw detection head 2 fixedly mounted on the mounting frame 1 contacts the weld 9, the elastic supplementary pressure group 41 cooperates with the corresponding latch assembly 42 to connect the ultrasonic flaw detection head 2 and the weld 9 at the same time, so that the weld 9 can be fully detected, avoiding the difficulty of fully detecting the weld 9 using a single ultrasonic flaw detection head 2 when the weld 9 of the pipeline 8 is wider, thereby reducing the accuracy of the quality detection of the pipeline 8.

[0043] See also Figure 1 and Figure 4 The elastic support group 5 includes a spring groove opened on the slide seat 6, and an L-shaped seat 50 is fixedly installed at the end of the mounting frame 1 arranged along its length direction. The L-shaped seat 50 is slidably connected to the spring groove, and a support spring 51 is installed between the L-shaped seat 50 and the spring groove.

[0044] The two ends of the mounting frame 1 cooperate with the L-shaped seat 50 and the support spring 51, so that when the mounting frame 1 is manually pressed down to drive the ultrasonic flaw detection head 2 to contact the weld 9, it has a certain range of movement, thereby avoiding the outer diameter of the pipe 8 fixed by the two clamp guide assemblies 3 being inconsistent with the outer diameter of the weld 9, affecting the fit between the ultrasonic flaw detection head 2 and the weld 9, and thereby reducing the accuracy of the quality inspection of the pipe 8.

[0045] See also Figure 1 , Figure 2 , Figure 3 and Figure 5 The elastic supplementary pressure group 41 includes a lifting frame 410 that slides up and down and is clamped on the mounting frame 1 in an inverted concave structure. The lifting frame 410 is across a section of the mounting frame 1 away from the pipe 8 and is provided with a locking hole in the middle part. The mounting frame 1 is provided with sliding grooves on both side walls arranged along its width direction. A push spring 411 is installed between the lifting frame 410 and the sliding groove, and an elastic compensation component is installed between the lifting frame 410 and the corresponding ultrasonic flaw detection head 2.

[0046] See also Figure 4 and Figure 5 The elastic compensation component includes a fixing rod 412 fixedly installed at both ends of the ultrasonic flaw detection head 2, and slots are provided at both ends of the lifting frame 410. The fixing rod 412 is slidably connected to the slot, and a push compensation spring 413 is installed between the fixing rod 412 and the slot.

[0047] Except for the ultrasonic flaw detection head 2 fixedly installed on the mounting frame 1, any other ultrasonic flaw detection head 2 that is needed will press against the corresponding lifting frame 410 to drive the corresponding ultrasonic flaw detection head 2 to move toward the weld 9. At this time, the pushing spring 411 connected to the lifting frame 410 contracts, and the corresponding ultrasonic flaw detection head 2 approaches the weld 9 and the distance between it and the weld 9 is smaller than the distance between the ultrasonic flaw detection head 2 fixedly installed on the mounting frame 1 and the weld 9; so that when the mounting frame 1 drives the ultrasonic flaw detection head 2 fixedly connected to it to press against the weld 9, the other required corresponding ultrasonic flaw detection heads 2 can be tightly attached to the weld 9 under the elastic force of the pushing compensation spring 413, thereby avoiding inconsistent roundness of the surface of the weld 9, which makes it difficult for the adjusted ultrasonic flaw detection head 2 to accurately fit closely with the weld 9 for detection, thereby reducing the detection accuracy of the weld 9 of the pipeline 8.

[0048] At the same time, the function of adjusting the number of ultrasonic flaw detection heads 2 used can be realized to avoid the unused ultrasonic flaw detection heads 2 from contacting the outer wall of the pipe 8 during the detection process and causing scratches on the outer wall of the pipe 8.

[0049] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 The latch assembly 42 includes a displacement groove opened on the end face of the pressing handle 40 close to the mounting frame 1, an ear plate 420 is slidably connected to the displacement groove, a pressing locking spring 421 is installed between the displacement groove and the ear plate 420, and a latch rod 422 is opened on the ear plate 420 and plugged into the corresponding locking hole, and the end of the latch rod 422 away from the ear plate 420 is in an arc shape to facilitate the insertion of the latch rod 422 into the locking hole.

[0050] Specific operation: when the elastic supplementary pressing group 41 cooperates with the corresponding latch assembly 42, first pull the corresponding ear plate 420 to drive the latch rod 422 to move and squeeze the pressing locking spring 421 to contract, then press the lifting frame 410 and drive the ultrasonic flaw detection head 2 connected thereto to move toward the weld 9. When the lifting frame 410 is tightly pressed against the mounting frame 1, release the ear plate 420. Under the action of the reset elastic force of the pressing locking spring 421, the ear plate 420 drives the latch rod 422 to move toward the lifting frame 410 until the latch rod 422 is inserted into the locking hole, thereby realizing the position locking of the lifting frame 410, and then achieving the function of adjusting the number of ultrasonic flaw detection heads 2 used.

[0051] See also Figure 1 and Figure 2 The pressure dispersion guide mechanism 7 includes an ear seat 70 installed on the side of the slide 6 away from the clamp guide assembly 3, and the ear seat 70 is provided with a guide slide groove symmetrically arranged along its length direction. A support frame 71 that slides up and down is connected in the guide slide groove, and a return spring 72 is installed between the support frame 71 and the guide slide groove. The two support frames 71 connected to the same ear seat 70 are arranged in an eight-shaped shape, and their large mouths face one side of the ultrasonic flaw detection head 2. The opposite ends of the two support frames 71 located on the same side of the width direction of the mounting frame 1 are jointly installed with a fixed seat 73, and a support roller 74 that is in rolling contact with the outer wall of the pipe 8 is rotatably connected to the fixed seat 73. Lower pressure strips 75 are installed on both sides of the middle part of the mounting frame 1 arranged along its width direction, and the end of the lower pressure strip 75 away from the mounting frame 1 conflicts with the fixed seat 73.

[0052] When the mounting frame 1 is manually pushed to drive the ultrasonic flaw detection head 2 to move toward the weld 9, the mounting frame 1 presses the fixing seat 73 through the lower pressure bar 75 to drive the support roller 74 to contact the weld 9, and at the same time drives the support frame 71 to move and pulls the reset spring 72 to extend. The lower pressure bar 75 cooperates with the support roller 74 and the elastic support group 5 to disperse the force manually applied to the mounting frame 1 to avoid excessive pressure and the problem of the ultrasonic flaw detection head 2 scratching and damaging the weld 9.

[0053] At the same time, the lower pressure strip 75 cooperates with the support roller 74 to limit and guide the movement of the ultrasonic flaw detection head 2 again, thereby further improving the accuracy of the quality inspection of the pipeline 8.

[0054] At the same time, the mounting frame 1 , the lower pressing strip 75 and the supporting frame 71 form a triangle, which not only improves the connection stability of the mounting frame 1 , but also improves the stability when the mounting frame 1 is manually pressed, thereby improving the accuracy of the weld 9 detection.

[0055] See also Figure 1 The mounting frame 1 is provided with connecting frames symmetrically arranged along its length direction by bolts on both sides thereof arranged along its width direction, and the supporting rollers 10 are rotatably connected to the connecting frames.

[0056] See also Figure 1 The mounting frame 1 is provided with four supplementary pressure plates 11 arranged in a rectangular shape. The supplementary pressure plates 11 are used to press against one end of the support frame 71 close to the slide seat 6 when the mounting frame 1 moves toward the pipeline 8 .

[0057] The supplementary pressure plate 11 cooperates with the support frame 71 and the supporting roller 10 to further control the downward pressing distance of the mounting frame 1, thereby controlling the pressing force of the ultrasonic flaw detection head 2 on the weld 9.

[0058] During operation, the weld 9 is first polished before detection so that the weld 9 and the outer wall of the pipe 8 are in a flat state, and then a coupling agent is coated on the weld 9.

[0059] Then, the mounting frame 1 and the ultrasonic flaw detection head 2 are fixed on the pipe 8 through the clamp guide assembly 3, so that the ultrasonic flaw detection head 2 is aligned with the weld 9. When the weld 9 of the pipe 8 is wider, the required number of ultrasonic flaw detection heads 2 is adjusted according to the required detection width. During the adjustment, the elastic supplementary pressing group 41 on the ultrasonic flaw detection head 2 cooperates with the corresponding latch assembly 42, so as to move the required ultrasonic flaw detection head 2 toward the pipe 8 and lock the position, so that when the ultrasonic flaw detection head 2 fixedly mounted on the mounting frame 1 contacts the weld 9, the ultrasonic flaw detection head 2 connected by the elastic supplementary pressing group 41 and the corresponding latch assembly 42 can be pressed against the weld 9 at the same time, so that the weld 9 can be fully detected.

[0060] Finally, by manually pressing the mounting frame 1 and pushing the mounting frame 1 to drive the slide 6 to move circumferentially along the outer wall of the pipe 8, the pressure dispersion guide mechanism 7 is used to disperse the control of the mounting frame 1 to drive the ultrasonic flaw detection head 2 to press against the weld 9, so as to avoid the problem of large friction force on the weld 9 during the movement of the ultrasonic flaw detection head 2 during detection, resulting in scratches on the weld 9. At the same time, the slide 6 slides along the guide groove 30, thereby guiding the movement of the mounting frame 1 and the ultrasonic flaw detection head 2, until the mounting frame 1 drives the ultrasonic flaw detection head 2 to rotate one circle along the outer wall of the pipe 8, and a comprehensive quality inspection of the weld 9 is performed.

[0061] When the ultrasonic flaw detection head 2 detects defects in the weld 9, the ultrasonic flaw detection head 2 feeds back a signal, which is transmitted to the processing module. The signal processing module processes the signal fed back by the ultrasonic flaw detection head 2, 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 9 according to the image displayed on the display.

[0062] 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.

[0063] 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.

[0064] 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 town gas pipeline quality detection device, characterized in that: include: A mounting frame (1), a plurality of ultrasonic flaw detection heads (2) and two clamp guide assemblies (3), wherein the plurality of ultrasonic flaw detection heads (2) are mounted on the middle portion of the mounting frame (1) via a detection width adjustment mechanism (4), wherein the detection width adjustment mechanism (4) is used to adjust the amount of contact between the ultrasonic flaw detection heads (2) and the weld (9) according to the width of the weld (9) between two pipes (8); Both ends of the mounting frame (1) are slidably connected to a slide seat (6) via an elastic support group (5); the mounting frame (1) moves along the radial direction of the pipeline (8) through the sliding cooperation between the elastic support group (5) and the slide seat (6); the two slide seats (6) are slidably cooperated with two clamp guide assemblies (3) respectively; the clamp guide assemblies (3) are used to limit and guide the slide seat (6); A pressure dispersion guide mechanism (7), the pressure dispersion guide mechanism (7) is connected to the two slide seats (6) and the mounting frame (1), and the pressure dispersion guide mechanism (7) is used to disperse and control the mounting frame (1) to drive the ultrasonic flaw detection head (2) to press against the weld (9); The detection width adjustment mechanism (4) comprises a push-down handle (40) installed on a side of the mounting frame (1) away from the pipe (8); except for one ultrasonic flaw detection head (2) fixedly installed on a side of the mounting frame (1) close to the pipe (8), the remaining ultrasonic flaw detection heads (2) are connected to the mounting frame (1) via an elastic supplementary pressing group (41) that slides radially along the pipe (8); a latch assembly (42) for locking the elastic supplementary pressing group (41) is installed on the push-down handle (40); when the elastic supplementary pressing group (41) cooperates with the corresponding latch assembly (42), the corresponding ultrasonic flaw detection head (2) is pressed against the weld (9) as the mounting frame (1) moves radially along the pipe (8); When the ultrasonic flaw detection head (2) fixedly mounted on the mounting frame (1) contacts the weld (9), the latch assembly (42) does not cooperate with the elastic supplementary pressing group (41), and the ultrasonic flaw detection head (2) connected to the elastic supplementary pressing group (41) does not contact the weld (9); when the ultrasonic flaw detection head (2) fixedly mounted on the mounting frame (1) does not contact the weld (9), the latch assembly (42) cooperates with the elastic supplementary pressing group (41), and the ultrasonic flaw detection head (2) connected to the elastic supplementary pressing group (41) contacts the weld (9).

2. A town gas pipeline quality detection device according to claim 1, characterized in that: The pressure dispersion guide mechanism (7) comprises an ear seat (70) installed on the side of the slide seat (6) away from the clamp guide assembly (3), the ear seat (70) is provided with a guide slide groove symmetrically arranged along its length direction, a support frame (71) is connected in the guide slide groove and slides up and down, a return spring (72) is installed between the support frame (71) and the guide slide groove, two support frames (71) connected to the same ear seat (70) are arranged in an eight-shaped shape, and the large mouth of the eight-shaped shape faces one side of the ultrasonic flaw detection head (2), the opposite ends of the two support frames (71) located on the same side of the width direction of the mounting frame (1) are jointly installed with a fixed seat (73), and a support roller (74) that is in rolling contact with the outer wall of the pipeline (8) is rotatably connected to the fixed seat (73), and lower pressure strips (75) are installed on both sides of the middle part of the mounting frame (1) arranged along its width direction, and the end of the lower pressure strip (75) away from the mounting frame (1) contacts the fixed seat (73).

3. A town gas pipeline quality detection device according to claim 1, characterized in that: The clamp guide assembly (3) is an expandable clamping strip structure. The diameter of the clamp guide assembly (3) is adjustable. The clamp guide assembly (3) is wound around the pipe (8) and closely adheres to the outer wall of the pipe (8) to form an annular structure. A guide groove (30) is provided on the side wall of the clamp guide assembly (3) away from the pipe (8).

4. A town gas pipeline quality detection device according to claim 1, characterized in that: The elastic support group (5) comprises a spring groove formed on a slide seat (6); an L-shaped seat (50) is fixedly mounted on the end of the mounting frame (1) arranged along its length direction; the L-shaped seat (50) is slidably connected to the spring groove; and a support spring (51) is mounted between the L-shaped seat (50) and the spring groove.

5. A town gas pipeline quality detection device according to claim 1, characterized in that: The elastic supplementary pressing group (41) comprises a lifting frame (410) which is slidably clamped on the mounting frame (1) and has an inverted concave structure. The lifting frame (410) is provided with a locking hole in the middle of a section of the mounting frame (1) which is away from the pipe (8). Both side walls of the mounting frame (1) arranged along its width direction are provided with sliding grooves. A push spring (411) is installed between the lifting frame (410) and the sliding groove. An elastic compensation component is installed between the lifting frame (410) and the corresponding ultrasonic flaw detection head (2).

6. A town gas pipeline quality detection device according to claim 5, characterized in that: The elastic compensation component comprises fixed rods (412) fixedly installed at both ends of the ultrasonic flaw detection head (2), slots are provided at both ends of the lifting frame (410), the fixed rods (412) are slidably connected to the slots, and a push compensation spring (413) is installed between the fixed rods (412) and the slots.

7. A town gas pipeline quality detection device according to claim 6, characterized in that: The latch assembly (42) comprises a displacement groove formed on the end surface of the pressing handle (40) close to the mounting frame (1), a lug plate (420) being slidably connected to the displacement groove, a pressing locking spring (421) being installed between the displacement groove and the lug plate (420), a latch rod (422) being formed on the lug plate (420) and being plugged into a corresponding locking hole, and an end of the latch rod (422) away from the lug plate (420) being in an arc shape.

8. A town gas pipeline quality detection device according to claim 1, characterized in that: The mounting frame (1) is provided with connecting frames symmetrically arranged along its length direction, which are installed by bolts on both sides arranged along its width direction, and the supporting rollers (10) are rotatably connected to the connecting frames.

9. A town gas pipeline quality detection device according to claim 2, characterized in that: Four supplementary pressure plates (11) arranged in a rectangular shape are mounted on the mounting frame (1), and the supplementary pressure plates (11) are used to press against one end of the support frame (71) close to the slide seat (6) when the mounting frame (1) moves toward the pipeline (8).

10. A town gas pipeline quality detection device according to claim 2, characterized in that: The mounting frame (1), the lower pressing strip (75) and the supporting frame (71) form a triangle.

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