Pipeline nondestructive low-interference detection device based on waveguide rod

Abstract

The utility model provides a pipeline lossless low-interference detection device based on a waveguide rod. The pipeline lossless low-interference detection device comprises a hoop, an inner liner, a mounting bracket, a cross brace, a waveguide rod sleeve and the waveguide rod, an inner liner is arranged on the inner layer of the hoop, and the hoop is matched with the inner liner to be tightly hooped on the outer wall of the pipeline; the lower end of the mounting bracket is fixed on the outer side of the hoop; the height direction of the mounting bracket is perpendicular to the axial direction of the hoop; the waveguide rod sleeve is fixed at the center of the mounting bracket, and the waveguide rod is arranged in the waveguide rod sleeve in a penetrating manner; the number of the transverse supports is at least two, the two ends of the transverse supports are fixed to the two ends of the inner side of the mounting support, the middles of the transverse supports penetrate through the waveguide rod sleeves, penetrating holes are formed in the centers of the transverse supports, the waveguide rods penetrate through the penetrating holes, and the penetrating holes press and lock the waveguide rods through annular gaskets; the inner end of the waveguide rod penetrates through the through holes in the hoop and the inner liner to form a contact capable of directly making contact with the outer wall of the pipeline. The device has the advantages of preventing the vibration interference of the surrounding environment on the waveguide rod and ensuring the detection precision.

Description

Technical Field

[0001] The utility model relates to the technical field of non-destructive testing, and specifically, to a non-destructive low-interference detection device for pipelines based on waveguide rods. Background Art

[0002] The waveguide rod detection technology is a relatively common non-destructive calibration technology, which is applied in various industries and has good non-destructive detection performance.

[0003] Among them, in the fields of petrochemical industry, municipal pipelines, etc., since these pipelines are usually buried underground and have relatively thick coating layers, soil layers or protective layers, and have a long operation cycle, general detection means are difficult to detect the corrosion situation of the pipelines. As the use time increases, corrosion and thinning or even leakage problems will occur in some areas. The method of external observation, on the one hand, requires digging the soil layer and breaking the coating layer or protective layer to truly obtain the real state, which is very cumbersome and not conducive to maintaining the pipeline performance.

[0004] At this time, the waveguide rod can effectively solve this problem, and the pipeline situation can be known without digging the soil layer or breaking the coating layer through the waveguide rod technology.

[0005] However, for some pipelines with a relatively deep buried depth and a complex upper structure, the waveguide rod needs to be led out from the pipeline for a long distance, and the waveguide rod transmits signals through waves. In this environment, it is very easy to encounter additional signal interference midway.

[0006] Therefore, when using a waveguide rod to detect a pipeline with a relatively deep buried depth, it is necessary to optimize the installation form of the waveguide rod to avoid interference from the environment as much as possible and improve the detection accuracy.

[0007] In order to solve the above problems, people have been seeking an ideal technical solution. Content of the Utility Model

[0008] The purpose of the utility model is to overcome the deficiencies of the prior art, and thus provide a non-destructive low-interference detection device for pipelines based on waveguide rods that can prevent the vibration interference of the surrounding environment to the waveguide rod and ensure the detection accuracy.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is: a non-destructive low-interference detection device for pipelines based on waveguide rods, including a hoop, a lining pad, a mounting bracket, a cross brace, a waveguide rod sleeve and a waveguide rod;

[0010] The inner layer of the hoop is provided with a lining pad, and the hoop cooperates with the lining pad to tightly fasten on the outer wall of the pipeline;

[0011] The lower end of the mounting bracket is fixed to the outside of the hoop. The mounting bracket is of a frame structure, and the height direction of the mounting bracket is perpendicular to the axial direction of the hoop.

[0012] The waveguide rod sleeve extends along the height direction of the mounting bracket and is fixed at the center of the mounting bracket. The inner diameter of the waveguide rod sleeve is larger than the outer diameter of the waveguide rod, and the waveguide rod is arranged to pass through the waveguide rod sleeve.

[0013] The number of the cross braces is at least two. Both ends of the cross braces are fixed to both inner ends of the mounting bracket. The middle part of the cross braces passes through the waveguide rod sleeve and a through hole is arranged at the center. The waveguide rod passes through the through hole, and a flexible annular gasket is arranged on the inner wall of the through hole. The waveguide rod is pressed and locked through the annular gasket.

[0014] The inner end of the waveguide rod passes through the through holes in the hoop and the inner gasket to form a contact head that can directly contact the outer wall of the pipeline. The outer end of the waveguide rod is led out from the waveguide rod sleeve.

[0015] Based on the above, the lateral width of the mounting bracket is less than or equal to the diameter of the hoop.

[0016] Based on the above, the waveguide rod is a cylindrical waveguide rod.

[0017] Based on the above, a sealing flexible gasket is arranged at the position of the through hole provided on the hoop corresponding to the waveguide rod.

[0018] Based on the above, the cross braces are arranged horizontally and are parallel to each other.

[0019] Based on the above, the waveguide rod sleeve is provided with a long hole extending vertically at the position where the cross braces pass through.

[0020] Based on the above, a limiting step is arranged at the through hole or the through hole, and a step convex ring is correspondingly arranged on the waveguide rod. The limiting step and the step convex ring cooperate to limit the longitudinal movement of the waveguide rod.

[0021] Based on the above, the mounting bracket and the hoop are connected by welding or fixed connection through bolts.

[0022] Based on the above, a layer of flexible cushion layer is arranged on the inner wall of the waveguide rod sleeve.

[0023] The utility model has substantial features and progress compared with the prior art. Specifically, the utility model connects the waveguide rod with the pipeline to be measured by using a hoop method in cooperation with a mounting bracket, ensuring the stability of the contact between the waveguide rod and the pipeline; a lining pad is arranged on the inner layer of the hoop, and a through hole and an annular lining pad are arranged for the waveguide rod in the cross brace of the mounting bracket. The multiple through holes and annular lining pads determine the three-dimensional stability of the waveguide rod, especially solving the problem of vibration interference in the surrounding environment. When these vibrations affect the hoop and the mounting bracket, due to the isolation of the lining pad structure, the vibration is effectively prevented from being transmitted to the waveguide rod, thereby improving the accuracy of the waveguide rod detection and having strong anti-interference ability.

[0024] Furthermore, to prevent the direct contact between the waveguide rod and the soil layer during the outward extraction process of the waveguide rod, a waveguide rod sleeve is provided, and a lining is provided to isolate the waveguide rod and ensure the accuracy of vibration transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a pipeline non-destructive low-interference detection device based on a waveguide rod in the utility model.

[0026] Figure 2 is a partial installation schematic diagram of the waveguide rod in the utility model.

[0027] In the figure: 1. Hoop; 2. Lining pad; 3. Mounting bracket; 4. Cross brace; 5. Waveguide rod sleeve; 6. Waveguide rod; 7. Pipeline; 8. Through hole; 9. Annular lining pad; 10. Through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions of the present utility model will be further described in detail below through specific embodiments.

[0029] Embodiment 1

[0030] As Figure 1 and Figure 2 shown, a pipeline non-destructive low-interference detection device based on a waveguide rod includes a hoop 1, a lining pad 2, a mounting bracket 3, a cross brace 4, a waveguide rod sleeve 5, and a waveguide rod 6.

[0031] A lining pad 2 is arranged on the inner layer of the hoop 1. The hoop 1 cooperates with the lining pad 2 to tightly fasten on the outer wall of the pipeline 7. The lining pad is a flexible washer, such as a rubber ring. Its main function is to prevent the surrounding environment from colliding with the hoop 1 and causing vibration, which will interfere with the waveguide rod detection. Through the isolation effect of the lining pad 2, the vibration caused by the environment is avoided from being transmitted to the pipeline through the hoop, and this design effectively solves the interference problem caused by the cooperation between the hoop 1 and the environment.

[0032] The lower end of the mounting bracket 3 is fixed to the outside of the hoop 1. The mounting bracket 3 is a frame structure. The height direction of the mounting bracket 3 is perpendicular to the axial direction of the hoop 1. The purpose of designing the mounting bracket 3 with a certain height is to fix the waveguide rod 6 so that the waveguide rod 6 can be self-stabilized with the support of the mounting bracket 3 without excessive stabilizing structures.

[0033] Specifically, the waveguide rod sleeve 5 extends along the height direction of the mounting bracket 3 and is fixed at the center of the mounting bracket 3. The inner diameter of the waveguide rod sleeve 5 is larger than the outer diameter of the waveguide rod 6. The waveguide rod 6 is arranged to pass through the waveguide rod sleeve 5. The mounting bracket 3 and the hoop 1 are connected by welding or bolt fixation.

[0034] The function of the waveguide rod sleeve 5 is to isolate from the surrounding environment. Since the depth buried in the ground is relatively deep, the waveguide rod 6 needs to be led outwards. During the leading-out process, it is inevitable to contact the soil environment, and contact is likely to bring vibration interference. Under the protection and isolation of the waveguide rod sleeve 5, this interference problem can be effectively solved, and the interference problem caused by the soil thickness can be minimized.

[0035] The number of the cross braces 4 is at least two. In this embodiment, it is set to three. In a preferred embodiment, more can also be set. The cross braces are arranged horizontally and are parallel to each other.

[0036] Both ends of the cross brace 4 are fixed to both inner ends of the mounting bracket 3. The middle part of the cross brace 4 passes through the waveguide rod sleeve 5 and a perforation 8 is arranged at the center. The waveguide rod 6 passes through the perforation 8. A flexible annular gasket 9 is arranged on the inner wall of the perforation 8. The perforation 8 presses and locks the waveguide rod 6 through the annular gasket 9.

[0037] The main function of the three cross braces 4 is to fix the waveguide rod 6, press different height positions of the waveguide rod 6 from high to low, and fix the waveguide rod 6 through friction. Under the cooperation of the perforation 8 and the annular gasket 9, on the one hand, the contact area between the surrounding environment and the waveguide rod 6 is reduced, and on the other hand, the annular gasket 9 is flexible, and the flexible annular gasket 9 can also isolate the vibration interference from the mounting bracket 3.

[0038] The inner end of the waveguide rod 6 passes through the through hole 10 on the hoop 1 and the inner gasket 2 to form a contact head that can directly contact the outer wall of the pipeline 7. The outer end of the waveguide rod 6 is led out from the waveguide rod sleeve 5 to form a pipeline non-destructive testing scheme based on the waveguide rod 6.

[0039] Working principle description:

[0040] During installation, first assemble the waveguide rod 6, the mounting bracket 3, and the hoop 1 together. Temporarily dig a perforation in the inner gasket 2 corresponding to the perforation position on the hoop 1. The perforation 8 at the center of the cross brace 4 and the annular gasket 9 cooperate to have a damping force relative to the waveguide rod 6, enabling the waveguide rod 6 to adjust the penetration length under the action of a certain external force, and extending the contact head of the waveguide rod 6 to the area close to the inner pipe.

[0041] Then install the hoop 1 and the inner gasket 2 on the pipe, and adjust the position of the waveguide rod 6 again to make it in close contact with the pipe. Through reading and testing with external equipment, judge whether the installation is in place.

[0042] Finally, bury the soil layer, lead out the outer end of the waveguide rod 6, and leave a connection interface with external equipment for subsequent wiring.

[0043] During detection, when an abnormal reading is found, a rough judgment can be made on the pipe in the detection area. If the wall thickness is thinned beyond the specification requirements, dig it out and replace it in time. If leakage is found, just make timely remedial treatment.

[0044] Since there is no rigid connection between the waveguide rod and the non-pipe area, and the contact area is greatly reduced, it can effectively solve the interference suffered by the waveguide rod during the pipeline detection process.

[0045] Embodiment 2

[0046] The main difference between this embodiment and Embodiment 1 is that the lateral width of the mounting bracket is less than or equal to the diameter of the hoop, avoiding too wide an excavation width and too much interference from the environment to the mounting bracket.

[0047] Embodiment 3

[0048] The main difference between this embodiment and Embodiment 1 is that the waveguide rod is a cylindrical waveguide rod. In other embodiments, the shape of the waveguide rod can also be rectangular, sheet-shaped, irregular-shaped, or other shapes with special requirements.

[0049] Embodiment 4

[0050] The main difference between this embodiment and Embodiment 1 is that a sealing flexible gasket is provided at the through hole corresponding to the waveguide rod on the hoop, which can further avoid the interference of the hoop to the waveguide rod. In general embodiments, it is only necessary to set the inner diameter of the through hole to be larger than the outer diameter of the waveguide rod.

[0051] Embodiment 5

[0052] The main difference between this embodiment and Embodiment 1 is that the waveguide rod sleeve is provided with a vertically extending long hole corresponding to the position where the cross brace passes through, so that the relative position relationship between the waveguide rod sleeve and the cross brace can be adjusted in the vertical direction.

[0053] Embodiment 6

[0054] The main difference between this embodiment and Embodiment 1 is that: a limiting step is provided at the perforation or via hole, and a stepped convex ring is correspondingly provided on the waveguide rod. The limiting step and the stepped convex ring cooperate to limit the longitudinal movement of the waveguide rod, which is mainly used to ensure the self-stability of the waveguide rod by setting steps in the case where the weight of the waveguide rod is large and it is difficult to stably maintain the state only by friction.

[0055] Embodiment 7

[0056] The main difference between this embodiment and Embodiment 1 is that: a layer of flexible cushion is provided on the inner wall of the waveguide rod sleeve, which can further prevent environmental vibration from being transmitted inward.

[0057] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered by the scope of the technical solutions claimed in the present invention.

Claims

1. A non-destructive and low-interference pipeline detection device based on a waveguide rod, characterized in that: It includes a hoop, an inner liner, a mounting bracket, a cross brace, a waveguide rod sleeve and a waveguide rod; An inner liner is provided on the inner layer of the hoop, and the hoop cooperates with the inner liner to be tightly clamped on the outer wall of the pipe; The lower end of the mounting bracket is fixed to the outside of the hoop, the mounting bracket is a frame structure, and the height direction of the mounting bracket is perpendicular to the axial direction of the hoop; The waveguide rod sleeve extends along the height direction of the mounting bracket and is fixed at the center of the mounting bracket. The inner diameter of the waveguide rod sleeve is larger than the outer diameter of the waveguide rod. The waveguide rod is inserted into the waveguide rod sleeve. The number of the cross braces is at least two, and the two ends of the cross brace are fixed to the two ends of the inner side of the mounting bracket. The middle part of the cross brace passes through the waveguide rod sleeve and a through hole is arranged at the center. The waveguide rod is arranged in the through hole. A flexible annular gasket is arranged on the inner wall of the through hole. The through hole presses and locks the waveguide rod through the annular gasket. The inner end of the waveguide rod passes through the through holes on the hoop and the inner liner to form a contact that can directly contact the outer wall of the pipeline, and the outer end of the waveguide rod is led out from the waveguide rod sleeve.

2. The non-destructive and low-interference pipeline detection device based on waveguide rod according to claim 1 is characterized in that: The transverse width of the mounting bracket is less than or equal to the diameter of the hoop.

3. The non-destructive and low-interference pipeline detection device based on waveguide rod according to claim 1 or 2, characterized in that: The waveguide rod is a cylindrical waveguide rod.

4. The non-destructive and low-interference pipeline detection device based on waveguide rod according to claim 3 is characterized in that: A sealing flexible gasket is arranged at the through hole arranged on the hoop corresponding to the waveguide rod.

5. The non-destructive and low-interference pipeline detection device based on waveguide rod according to claim 4 is characterized in that: The cross braces are arranged horizontally, and the cross braces are parallel to each other.

6. The non-destructive and low-interference pipeline detection device based on waveguide rod according to claim 5 is characterized in that: The waveguide rod sleeve is provided with a vertically extending long hole at a position corresponding to the position where the cross brace passes through.

7. The non-destructive and low-interference pipeline detection device based on waveguide rod according to claim 1, 2, 4, 5 or 6, characterized in that: A limiting step is arranged at the through hole or through hole, and a step convex ring is correspondingly arranged on the waveguide rod. The limiting step and the step convex ring cooperate to limit the longitudinal movement of the waveguide rod.

8. The non-destructive and low-interference pipeline detection device based on waveguide rod according to claim 1, 2, 4, 5 or 6, characterized in that: The mounting bracket and the hoop are welded or fixedly connected by bolts.

9. The non-destructive and low-interference pipeline detection device based on waveguide rod according to claim 1, 2, 4, 5 or 6, characterized in that: A flexible cushion layer is arranged on the inner wall of the waveguide rod sleeve.

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