Municipal fuel gas pipeline crack laser detection device

Abstract

The invention relates to the technical field of municipal gas pipeline detection, in particular to a municipal gas pipeline crack laser detection device which comprises a mounting sliding rail, an electric sliding block and a laser detector, a fastening mechanism is arranged on the outer side of the mounting sliding rail, an adjusting mechanism is arranged between the electric sliding block and the laser detector, and the fastening mechanism comprises a stabilizing block. The top of the stabilizing block is fixedly connected with a threaded bearing, the interior of the threaded bearing is in threaded connection with a screw rod, the top of the screw rod is fixedly connected with a rotating handle, and the bottom of the screw rod is fixedly connected with a positioning cover. The pipeline crack detection device meets the crack detection requirements of different parts of a pipeline, the telescopic distance of the laser detector can be flexibly adjusted through the combination of a connecting rod, a movable pipe, a reset spring and a movable rod, and the adjusting process is accurate and stable and deviation is avoided through the guide effect of a limiting groove and a sliding plate.

Description

Laser detection device for cracks in municipal gas pipelines Technical Field

[0001] This invention relates to the field of municipal gas pipeline inspection technology, specifically a laser inspection device for cracks in municipal gas pipelines. Background Technology

[0002] Municipal gas pipelines are the core infrastructure for urban energy transmission, widely laid in urban roads, residential areas, and public areas. Their operational safety is directly related to the safety of people's lives and property and the normal operation of the city. With the extension of the pipeline's laying age, underground soil corrosion, ground subsidence, vehicle load impact, and the aging of the pipeline's own materials, various factors such as cracks and damage of varying degrees can easily occur on the outer wall of the pipeline. If such defects are not detected and dealt with in a timely manner, they can easily lead to gas leaks, which can then induce major safety accidents such as explosions and fires, while also causing energy waste and environmental pollution, posing a great challenge to municipal gas operation and maintenance.

[0003] To address the shortcomings of manual inspection, simplified laser inspection equipment has begun to be used in some inspection scenarios. However, existing laser inspection equipment still has significant drawbacks in practical applications, making it difficult to adapt to the diverse inspection needs of municipal gas pipelines. Existing equipment lacks reliable fixing mechanisms, and municipal gas pipelines vary in specifications (different pipe diameters and significant differences in outer wall flatness), making it difficult to achieve stable fixing of the inspection equipment. Slippage and displacement easily occur during inspection, leading to decreased laser inspection accuracy and an inability to accurately identify minute cracks in the pipeline. Furthermore, the detector position adjustment flexibility of existing laser inspection equipment is insufficient, failing to flexibly adjust the detection distance and angle of the laser detector according to the needs of the pipeline inspection location (such as pipe bends, joints, and other special locations), easily resulting in blind spots and affecting the inspection coverage and effect. In addition, some equipment uses a rigid fixing structure, making hard contact with the outer wall of the pipeline, which can easily scratch the pipeline surface during fixing, damaging the pipeline's anti-corrosion layer, accelerating pipeline corrosion and aging, and further increasing pipeline safety hazards.

[0004] Therefore, a laser detection device for cracks in municipal gas pipelines is proposed to address the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a laser detection device for cracks in municipal gas pipelines to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A laser detection device for cracks in municipal gas pipelines includes a mounting slide rail, an electric slider, and a laser detector. A fastening mechanism is provided on the outer side of the mounting slide rail, and an adjustment mechanism is provided between the electric slider and the laser detector.

[0008] The fastening mechanism includes a stabilizing block, a threaded bearing fixedly connected to the top of the stabilizing block, a screw threadedly connected to the inside of the threaded bearing, a rotating handle fixedly connected to the top of the screw, and a positioning cover fixedly connected to the bottom of the screw.

[0009] The adjusting mechanism includes a connecting rod, a movable tube fixedly connected to the outer side of the connecting rod, a return spring fixedly connected to the inside of the movable tube, and a moving rod fixedly connected to the outer side of the return spring.

[0010] As a further optimization of the present invention, the following features are provided: a nylon rod is movably engaged on the inner side of the mounting slide rail; a clamping cover is fixedly connected to the outer side of the nylon rod; a compression spring is sleeved on the nylon rod; a shock-absorbing pad is provided on the inner side of the clamping cover; a limit groove is formed in the inner wall of the movable tube; a sliding plate is fixedly connected to the outer side of the moving rod; a U-shaped plate is fixedly connected to the outer side of the moving rod; a sliding ring is fixedly connected to the end of the U-shaped plate away from the moving rod; a positioning pin is movably engaged inside the outer side of the sliding ring; a pull cover is fixedly connected to the outer side of the positioning pin; a compression spring is sleeved on the positioning pin; and a positioning hole is formed in the side wall of the movable tube.

[0011] As a further optimization of the present invention, the electric slider is slidably connected to the outside of the mounting rail, and the stabilizing block is fixedly connected to the outside of the mounting rail.

[0012] As a further optimization of the present invention, the screw is threadedly connected to the inside of the threaded bearing via a rotating handle, and the screw traverses the inside of the mounting slide rail, and the positioning cover is movably connected to the inside of the mounting slide rail.

[0013] As a further optimization of the present invention, the connecting rod is fixedly connected to the outside of the electric slider, and the end of the moving rod away from the movable tube is fixedly connected to the outside of the laser detector.

[0014] As a further optimization of the present invention, the limiting grooves are evenly distributed in the inner wall of the movable tube, and the sliding plate is adapted to the limiting grooves.

[0015] As a further optimization of the present invention, the clamping cover is movable and symmetrically distributed inside the mounting slide rail via nylon rods, and the nylon rods and compression springs are symmetrically distributed between the clamping cover and the mounting slide rail.

[0016] As a further optimization of the present invention, the sliding ring is slidably connected to the outside of the movable tube via a U-shaped plate, and the positioning pin passes through the inner wall of the sliding ring.

[0017] As a further optimization of the present invention, the positioning holes are evenly distributed in the side wall of the movable tube, and the positioning pin is adapted to the positioning hole.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In this invention, the fastening mechanism and the installation slide rail work together to achieve stable adaptation and rapid fixation of municipal gas pipelines of different specifications. The combination design of the stabilizing block, threaded bearing, screw, and positioning cover allows the screw to move up and down by rotating the handle. Then, the positioning cover, in conjunction with the clamping cover inside the installation slide rail, firmly fixes the device to the outside of the pipeline. It is easy to assemble and disassemble and is securely fixed. At the same time, the shock-absorbing pad inside the clamping cover, together with the nylon rod and compression spring, forms a flexible clamping structure, which can not only improve the fit between the device and the pipeline, but also avoid damage to the pipeline surface caused by hard contact, thus ensuring the integrity of the original structure of the pipeline.

[0020] 2. In this invention, the adjustment mechanism significantly improves the detection flexibility and adaptability of the laser detector, meeting the crack detection needs of different parts of the pipeline. The combination of the connecting rod, movable tube, return spring, and moving rod can flexibly adjust the extension distance of the laser detector. With the guiding effect of the limiting groove and the sliding plate, the adjustment process is accurate and stable, avoiding deviation. The cooperation of the sliding ring, positioning pin, and multiple sets of positioning holes can quickly lock the position of the laser detector after adjustment, ensuring that the detection accuracy will not be affected by the shaking of the device during the detection process. The return spring can assist the moving rod in resetting after adjustment, improving the convenience of operation.

[0021] 3. In this invention, the overall design of the device balances detection efficiency and operational safety, effectively solving the drawbacks of traditional manual inspection. The electric slider drives the laser detector along the mounting rail, enabling continuous automated inspection of gas pipelines. This significantly reduces the labor intensity of manual inspection and avoids the safety risks associated with close contact with gas pipelines. The rational combination of various mechanisms ensures stable overall operation of the device, and the vibration damping pads reduce the interference of external vibrations on detection accuracy, further improving the accuracy of crack detection and providing reliable protection for the safe operation and maintenance of municipal gas pipelines. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a schematic diagram of the structure of the outer side of the mounting ring of the present invention;

[0024] Figure 3 is a schematic diagram of the outer structure of the adjustment mechanism of the present invention;

[0025] Figure 4 is a schematic diagram of the internal structure of the movable tube of the present invention;

[0026] Figure 5 is a cross-sectional view of the side structure of the sliding ring of the present invention;

[0027] Figure 6 is an enlarged view of the structure at point A in Figure 2 of this invention;

[0028] Figure 7 is an enlarged view of the structure at point B in Figure 4 of the present invention;

[0029] Figure 8 is a physical image of the present invention.

[0030] In the diagram: 1. Mounting slide rail; 11. Nylon rod; 12. Clamping cover; 13. Compression spring; 14. Shock-absorbing pad; 2. Electric slider; 3. Laser detector; 4. Fastening mechanism; 41. Stabilizing block; 42. Threaded bearing; 43. Rotating handle; 44. Screw; 45. Positioning cover; 5. Adjusting mechanism; 51. Connecting rod; 52. Movable tube; 521. Limiting groove; 53. Return spring; 54. Moving rod; 541. Slide plate; 542. U-shaped plate; 543. Sliding ring; 544. Positioning pin; 545. Pulling cover; 546. Compression spring; 547. Positioning hole. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Please refer to Figures 1-8. This invention provides a technical solution:

[0034] A laser detection device for cracks in municipal gas pipelines includes a mounting slide rail 1, an electric slider 2, and a laser detector 3. A fastening mechanism 4 is provided on the outside of the mounting slide rail 1, and an adjustment mechanism 5 is provided between the electric slider 2 and the laser detector 3.

[0035] The fastening mechanism 4 includes a stabilizing block 41, a threaded bearing 42 fixedly connected to the top of the stabilizing block 41, a screw 44 connected to the internal thread of the threaded bearing 42, a rotating handle 43 fixedly connected to the top of the screw 44, and a positioning cover 45 fixedly connected to the bottom of the screw 44.

[0036] The adjustment mechanism 5 includes a connecting rod 51, a movable tube 52 fixedly connected to the outside of the connecting rod 51, a return spring 53 fixedly connected inside the movable tube 52, and a moving rod 54 fixedly connected to the outside of the return spring 53.

[0037] It should be noted that: the electric slider 2 is slidably connected to the outside of the mounting slide rail 1, the stabilizing block 41 is fixedly connected to the outside of the mounting slide rail 1, the screw 44 is threadedly connected to the inside of the threaded bearing 42 through the rotating handle 43, and the screw 44 passes through the inside of the mounting slide rail 1, the positioning cover 45 is movably connected to the inside of the mounting slide rail 1, the connecting rod 51 is fixedly connected to the outside of the electric slider 2, the end of the moving rod 54 away from the moving tube 52 is fixedly connected to the outside of the laser detector 3, the limiting groove 521 is evenly distributed in the inner wall of the moving tube 52, and the sliding plate 541 is adapted to the limiting groove 521.

[0038] Furthermore, the electric slider 2 is slidably connected to the outside of the mounting rail 1 and can make linear reciprocating motion along the mounting rail 1, providing power support for the movement and detection of the laser detector 3. At the same time, the laser detector 3 is the execution component for crack detection. It is connected to the electric slider 2 through the adjustment mechanism 5 and completes the laser detection of cracks at different locations of the gas pipeline as the electric slider 2 moves. The mounting rail 1 is the installation base of the whole device. It not only supports the electric slider 2, but also integrates the fastening mechanism 4 and clamping components to fix the device to the gas pipeline, while providing a connection fulcrum for the adjustment mechanism 5.

[0039] Specifically: The stabilizing block 41 serves as the fixed base for the fastening mechanism 4, directly fixedly connected to the outside of the mounting slide rail 1, providing installation support for subsequent components. Simultaneously, a threaded bearing 42 is fixedly connected to the top of the stabilizing block 41, with the threaded bearing 42 internally threadedly connected to the screw 44, enabling threaded transmission of the screw 44. A rotating handle 43 is fixedly connected to the top of the screw 44, and a positioning cover 45 is fixedly connected to the bottom. The screw 44 traverses the interior of the mounting slide rail 1, and the positioning cover 45 is movably connected to the interior of the mounting slide rail 1. During operation, rotating the rotating handle 43 drives the screw 44 to perform up-and-down threaded transmission along the threaded bearing 42, thereby causing the positioning cover 45 to move up and down. The downward movement of the positioning cover 45 presses against the outer wall of the gas pipeline, cooperating with the inner clamping assembly to achieve a secure fixation between the device and the pipeline, adapting to the fastening requirements of pipelines with different diameters.

[0040] As a further implementation of this solution, a nylon rod 11 is movably engaged on the inner side of the mounting slide rail 1, a clamping cover 12 is fixedly connected to the outer side of the nylon rod 11, a compression spring 13 is sleeved on the nylon rod 11, a shock-absorbing pad 14 is provided on the inner side of the clamping cover 12, a limit groove 521 is opened in the inner wall of the movable tube 52, a sliding plate 541 is fixedly connected to the outer side of the moving rod 54, a U-shaped plate 542 is fixedly connected to the outer side of the moving rod 54, a sliding ring 543 is fixedly connected to the end of the U-shaped plate 542 away from the moving rod 54, a positioning pin 544 is movably engaged inside the outer side of the sliding ring 543, a pull cover 545 is fixedly connected to the outer side of the positioning pin 544, a compression spring 546 is sleeved on the positioning pin 544, and a positioning hole 547 is opened in the side wall of the movable tube 52.

[0041] It should be noted that: the clamping cover 12 is movable and symmetrically distributed inside the mounting slide rail 1 via the nylon rod 11, and the nylon rod 11 and the compression spring 13 are symmetrically distributed between the clamping cover 12 and the mounting slide rail 1. The sliding ring 543 is slidably connected to the outside of the movable tube 52 via the U-shaped plate 542. The positioning pin 544 passes through the inner wall of the sliding ring 543. The positioning holes 547 are evenly distributed in the side wall of the movable tube 52. The positioning pin 544 and the positioning hole 547 are matched.

[0042] Furthermore, the connecting rod 51 serves as the connection base for the adjustment mechanism. One end is directly fixedly connected to the outside of the electric slider 2, and the other end is fixedly connected to the movable tube 52, thus fixing the adjustment mechanism 5 to the electric slider 2. Meanwhile, the movable tube 52 is a hollow structure, with a return spring 53 fixedly connected inside. The outside of the return spring 53 is fixedly connected to the moving rod 54. The end of the moving rod 54 away from the movable tube 52 is directly fixedly connected to the outside of the laser detector 3. The return spring 53 provides elastic support, pushing the moving rod 54 to move telescopically along the movable tube 52, thereby enabling the laser detector 3 to achieve elastic adjustment of its front and rear positions, adapting to the distance requirements of different detection surfaces of the pipeline.

[0043] Specifically: the limiting grooves 521 are evenly distributed in the inner wall of the movable tube 52. The sliding plate 541 is adapted to the limiting grooves 521, and the sliding plate 541 is slidably engaged in the limiting grooves 521. The cooperation between the limiting grooves 521 and the sliding plate 541 can limit the movement direction of the moving rod 54, prevent the moving rod 54 from rotating in the movable tube 52, ensure the stability of the detection direction during the adjustment of the laser detector 3, and avoid detection deviation. When the moving rod 54 drives the laser detector 3 to adjust to the appropriate position, the compression spring 546 pushes the positioning pin 544 to insert into the positioning hole 547 at the corresponding position, thereby fixing the position of the moving rod 54 and the movable tube 52, and locking the detection position of the laser detector 3. If further adjustment is required, pulling the pull cover 545 will cause the positioning pin 544 to disengage from the positioning hole 547, thereby unlocking the movement restriction of the moving rod 54.

[0044] Workflow: First, the installation slide rail 1 is placed against the outside of the gas pipeline to be tested, so that the pipeline is located between the two sets of symmetrical clamping covers 12 on the inner side of the installation slide rail 1. At this time, the nylon rod 11 slides along the inner wall of the installation slide rail 1 under the pressure of the pipeline. The compression spring 13 sleeved on the nylon rod 11 is compressed, and its elastic restoring force pushes the clamping cover 12 to fit against the pipeline to form a preliminary flexible clamping. The shock-absorbing pad 14 on the inner side of the clamping cover 12 not only enhances the clamping friction and avoids damage to the pipeline, but also plays a role in shock absorption and buffering. Then, the rotating handle 43 is turned to drive the screw 44 fixedly connected to it to rotate. Since the screw 44 is threadedly connected to the threaded bearing 42 at the top of the stabilizing block 41, and the stabilizing block 41 is fixed on the outside of the installation slide rail 1, the screw 44 moves downward along the axial direction of the threaded bearing 42, pushing the bottom positioning cover 45 to move down and tightly abut against the pipeline surface, forming a three-way positioning with the clamping covers 12 on both sides, and firmly fixing the device on the pipeline, thus completing the installation and fixing to avoid displacement and shaking during testing.

[0045] Next, the position of the laser detector 3 is adjusted. The connecting rod 51 is fixed to the outside of the electric slider 2, and the movable tube 52 is fixedly connected to the connecting rod 51. One end of the moving rod 54 is fixed to the laser detector 3, and the other end extends into the movable tube 52 and is fixed to the return spring 53. Pulling or pushing the laser detector 3 can cause the moving rod 54 to slide along the inner wall of the movable tube 52. The return spring 53 is stretched or compressed accordingly. At the same time, the sliding plate 541 on the outside of the moving rod 54 slides along the limiting groove 521 on the inner wall of the movable tube 52, which plays a guiding and limiting role to prevent the moving rod 54 from deviating and rotating. After adjusting to the appropriate position, the sliding ring 543 slides synchronously with the moving rod 54 through the U-shaped plate 542. The positioning pin 544 passes through the sliding ring 543 under the elastic action of the compression spring 546 and is inserted into the positioning hole 547 on the side wall of the movable tube 52, realizing the relative fixation of the moving rod 54 and the movable tube 52, locking the position of the laser detector 3. If readjustment is required, the position can be adjusted. To disengage the positioning pin 544 from the positioning hole 547, pull the outer pull cover 545 of the positioning pin 544. The moving rod 54 is then reset by the return spring 53. Finally, the electric slider 2 is activated, allowing it to slide at a constant speed along the mounting rail 1, which in turn moves the laser detector 3 connected to the adjustment mechanism 5 synchronously. After activation, the laser detector 3 emits a laser beam onto the pipe surface. When a crack exists in the pipe, the laser beam is reflected and refracted. The laser detector 3 captures this signal and transmits it to the external control terminal. After processing by the terminal, the location and size of the crack are accurately identified. During the detection process, the electric slider 2 slides at a constant speed to achieve continuous scanning of the pipe without the need for manual movement, significantly reducing labor intensity. The shock-absorbing pad 14 reduces external vibration interference and ensures detection accuracy. The stable fixing of the fastening mechanism 4 and the precise limiting of the adjustment mechanism 5 further ensure the stability and reliability of the entire detection process, completing the comprehensive detection of cracks in the gas pipeline.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser detection device for cracks in municipal gas pipelines, comprising a mounting slide rail (1), an electric slider (2), and a laser detector (3), characterized in that: A fastening mechanism (4) is provided on the outer side of the mounting slide rail (1), and an adjustment mechanism (5) is provided between the electric slider (2) and the laser detector (3); the fastening mechanism (4) includes a stabilizing block (41), a threaded bearing (42) is fixedly connected to the top of the stabilizing block (41), a screw (44) is threadedly connected to the inside of the threaded bearing (42), a rotating handle (43) is fixedly connected to the top of the screw (44), and a positioning cover (45) is fixedly connected to the bottom of the screw (44); the adjustment mechanism (5) includes a connecting rod (51), a movable tube (52) is fixedly connected to the outer side of the connecting rod (51), a return spring (53) is fixedly connected to the inside of the movable tube (52), and a moving rod (54) is fixedly connected to the outer side of the return spring (53).

2. The laser detection device for cracks in municipal gas pipelines according to claim 1, characterized in that: The inner side of the mounting slide rail (1) is movably connected to a nylon rod (11), and the outer side of the nylon rod (11) is fixedly connected to a clamping cover (12). A compression spring (13) is sleeved on the nylon rod (11), and a shock-absorbing pad (14) is provided on the inner side of the clamping cover (12). A limit groove (521) is opened in the inner wall of the movable tube (52). A sliding plate (541) is fixedly connected to the outer side of the moving rod (54), and a U-shaped plate (542) is fixedly connected to the outer side of the moving rod (54). A sliding ring (543) is fixedly connected to the end of the U-shaped plate (542) away from the moving rod (54). A positioning pin (544) is movably connected to the inner side of the sliding ring (543), and a pull cover (545) is fixedly connected to the outer side of the positioning pin (544). A compression spring (546) is sleeved on the positioning pin (544), and a positioning hole (547) is opened in the side wall of the movable tube (52).

3. The laser detection device for cracks in municipal gas pipelines according to claim 1, characterized in that: The electric slider (2) is slidably connected to the outside of the mounting slide rail (1), and the stabilizing block (41) is fixedly connected to the outside of the mounting slide rail (1).

4. The laser detection device for cracks in municipal gas pipelines according to claim 1, characterized in that: The screw (44) is threadedly connected to the inside of the threaded bearing (42) via a rotating handle (43), and the screw (44) traverses the inside of the mounting slide rail (1). The positioning cover (45) is movably connected to the inside of the mounting slide rail (1).

5. The laser detection device for cracks in municipal gas pipelines according to claim 1, characterized in that: The connecting rod (51) is fixedly connected to the outside of the electric slider (2), and the end of the moving rod (54) away from the moving tube (52) is fixedly connected to the outside of the laser detector (3).

6. The laser detection device for cracks in municipal gas pipelines according to claim 2, characterized in that: The limiting groove (521) is evenly distributed in the inner wall of the movable tube (52), and the sliding plate (541) is adapted to the limiting groove (521).

7. The laser detection device for cracks in municipal gas pipelines according to claim 2, characterized in that: The clamping cover (12) is movable and symmetrically distributed inside the mounting slide rail (1) via a nylon rod (11), and the nylon rod (11) and the compression spring (13) are symmetrically distributed between the clamping cover (12) and the mounting slide rail (1).

8. The laser detection device for cracks in municipal gas pipelines according to claim 2, characterized in that: The sliding ring (543) is slidably connected to the outside of the movable tube (52) via a U-shaped plate (542), and the positioning pin (544) passes through the inner wall of the sliding ring (543).

9. The laser detection device for cracks in municipal gas pipelines according to claim 2, characterized in that: The positioning holes (547) are evenly distributed in the side wall of the movable tube (52), and the positioning pins (544) are adapted to the positioning holes (547).

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