Efficient and stable distributed optical fiber rain and sewage pipeline defect detection excitation device

Abstract

The utility model discloses an efficient and stable distributed optical fiber rain and sewage pipeline defect detection excitation device. Comprising a vibration motor, an adjusting piece and a plurality of inner supporting top plates. The vibration motor is fixed at one end of the adjusting mechanism; the multiple inner supporting top plates are circumferentially distributed around the adjusting piece through the connecting rod assemblies. The adjusting piece drives the connecting rod assembly to drive the multiple inner supporting top plates to synchronously expand outwards so as to support the inner wall of the pipeline. Compared with the prior art, the vibration excitation device has the advantages that the vibration excitation device is simple in structure, convenient to install, stable in operation and highly adaptive to the complex rain and sewage pipeline environment, and flexible adaptation and stable supporting of pipelines with different diameters are achieved through the precisely-designed connecting rod assembly and the adjusting mechanism.

Description

Technical Field

[0001] This utility model relates to the field of pipeline defect detection technology, specifically to a high-efficiency and stable distributed optical fiber excitation device for detecting defects in rainwater and sewage pipelines. Background Technology

[0002] With rapid urbanization, underground pipe networks, as the core of urban infrastructure, are becoming increasingly complex and dense, bearing the heavy responsibility of transporting critical resources such as water, natural gas, and oil, directly impacting urban operations and residents' lives. However, these pipelines face multiple risks, including natural aging, environmental erosion, geological changes, and construction damage. Rainwater and sewage pipes, in particular, frequently experience disconnections and gaps. Failure to promptly inspect and repair these defects can lead to water waste, groundwater pollution, ecological damage, and public safety incidents.

[0003] Traditional pipeline inspection methods, such as manual inspection and external equipment testing, while effective to some extent, suffer from long inspection cycles, low efficiency, and difficulty in detecting hidden defects, failing to meet high-standard monitoring requirements. The emergence of distributed fiber optic sensing technology, with its ultra-long detection distance, high sensitivity, and precise positioning capabilities, provides a new approach to pipeline inspection. This technology can monitor internal strain and temperature changes in pipelines in real time, effectively identifying defects and providing technical support for pipeline safety management.

[0004] However, to fully realize the potential of this technology, it requires a highly efficient, stable, and reliable vibration excitation device. By exciting the pipeline to vibrate, the distributed optical fiber can capture more obvious vibration signals and accurately determine internal pipeline defects. However, existing vibration excitation devices are complex in design, cumbersome to install, and lack stability. Especially in complex underground stormwater and sewage pipeline environments, the excitation effect and detection accuracy are difficult to guarantee.

[0005] Therefore, developing a vibration device that is simple in structure, easy to install, stable in operation, and adaptable to complex stormwater and sewage pipe environments is of great significance for improving the efficiency and accuracy of stormwater and sewage pipe inspection and ensuring the safe and stable operation of urban underground pipe networks. Utility Model Content

[0006] To address the aforementioned problems, this invention provides a highly efficient and stable distributed optical fiber excitation device for detecting defects in rainwater and sewage pipes.

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a high-efficiency and stable distributed optical fiber rainwater and sewage pipeline defect detection excitation device;

[0008] Includes a vibration motor, adjusting components, and several internal support top plates;

[0009] The vibration motor is fixed to one end of the adjustment mechanism;

[0010] Several of the aforementioned inner support top plates are circumferentially distributed around the adjusting member via a connecting rod assembly;

[0011] The adjusting member drives several inner support top plates to expand synchronously outward through a driving link assembly to support the inner wall of the pipeline.

[0012] Further, the adjusting member comprises a motor base, a lead screw and a moving seat, one side of the motor base is fixed with a vibration motor, the lead screw is rotatably arranged on the side of the motor base away from the vibration motor through a bearing, and the moving seat is threadedly connected to the lead screw through a built-in lead screw nut;

[0013] The link assembly comprises inner links and outer links, one end of the inner links and the outer links is rotatably connected with the inner support top plate through a common pin shaft, and the end of the inner links and the outer links away from the inner support top plate is rotatably connected with the motor base and the moving seat respectively.

[0014] Further, the lead screw is provided with trapezoidal teeth.

[0015] Further, the end of the lead screw away from the motor base is provided with a hand wheel.

[0016] Further, the lead screw is threadedly connected with a locking nut located at the rear end of the moving seat.

[0017] Further, the number of the inner support top plates is six.

[0018] Further, the contact surface of the inner support top plate with the inner wall of the pipeline is a circular arc with an anti-skid groove.

[0019] Compared with the prior art, the application has the advantages that a vibration excitation device with simple structure, convenient installation, stable operation and high adaptability to complex rainwater and sewage pipeline environment is provided. Through the precisely designed link assembly and adjusting mechanism, the device can flexibly adapt to and stably support pipelines with different diameters. In particular, the efficient transmission design of the trapezoidal tooth lead screw and the ingenious application of the hand wheel and the locking nut not only improve the adjusting precision and stability of the device, but also greatly facilitate the operation of the user. In addition, the six circular arc-shaped inner support top plates with anti-skid grooves ensure that the device always maintains a stable support state during vibration detection, effectively preventing the problem of over-tightening failure. Under the joint action of these innovative designs, the stability, reliability and efficiency of pipeline defect detection are significantly improved, providing a powerful guarantee for the safe and stable operation of urban underground pipe networks. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a three-dimensional schematic view of the overall structure of the utility model;

[0021] Figure 2 is a three-dimensional schematic view of a single set of crank slider mechanism of the utility model;

[0022] Figure 3 is the explosion schematic view of the screw rod installation details of the utility model;

[0023] Figure 4 is the inside pipe top pressing state schematic view of the utility model.

[0024] As shown in the figure: 1, vibration motor, 2, motor base, 3, inner connecting rod, 4, inner support top plate, 5, outer connecting rod, 6, moving seat, 7, locking nut, 8, screw rod, 9, hand wheel, 10, screw rod nut. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0028] In addition, the technical solutions of each embodiment of the utility model can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0029] Referring to the drawings Figure 1 - the drawings Figure 4 The application provides a kind of high-efficiency stable distributed optical fiber rain sewage pipe defect detection vibration device, including vibration motor 1, adjusting piece and several inner support top plate 4;

[0030] Firstly, in the core structure of the device, the vibration motor 1 is firmly fixed to one end of the adjusting mechanism, providing the necessary vibration energy as the excitation source. At the same time, several inner support top plates 4 are distributed around the adjusting mechanism through a precisely designed linkage assembly, and the adjusting mechanism drives the linkage assembly to drive several inner support top plates 4 to expand synchronously outward to support the inner wall of the pipeline. This layout ensures that the device can uniformly and stably apply pressure inside the pipeline.

[0031] In one embodiment, in order to more flexibly adjust the position of the inner support top plate 4 to adapt to different inner diameters of the pipeline, the adjusting mechanism is designed to include a combination of the motor base 2, the lead screw 8, and the moving seat 6. One side of the motor base 2 is closely connected with the vibration motor 1, while the lead screw 8 is rotatably arranged on the other side of the motor base 2 through a precision bearing. The moving seat 6 is threadedly connected with the lead screw 8 through the built-in lead screw nut 10, which allows the moving seat 6 to move along the axial direction of the lead screw 8. In addition, the linkage assembly is composed of inner linkages 3 and outer linkages 5, one end of which is rotatably connected with the inner support top plate 4 through a common pin shaft, and the other end is rotatably connected with the motor base 2 and the moving seat 6, respectively. It is worth noting that the inner linkages 3, the outer linkages 5, and the lead screw 8 form a stable triangular structure, which greatly improves the stability and reliability of the device. In particular, during installation, the lead screw 8 should be passed through the motor base 2 first, and then the vibration motor 1 is fixed on the motor base 2, to avoid the problem that the lead screw 8 cannot be installed due to the wrong installation sequence. At the same time, the lead screw nut 10 is cleverly built into the moving seat 6 through screws, forming a tight thread connection with the lead screw 8.

[0032] In another embodiment, in order to further optimize the transmission performance of the lead screw 8, the tooth shape of the lead screw 8 is designed as trapezoidal teeth, which is a high-efficiency form of screw transmission. Through the tight rotation of the lead screw nut 10 and the lead screw 8, the lead screw 8 can efficiently convert rotary motion into linear motion, providing powerful power support for the synchronous expansion of the inner support top plate 4.

[0033] Further, in order to facilitate the user to manually adjust the rotation of the lead screw 8, a hand wheel 9 is specially provided at the end of the lead screw 8 away from the motor base 2. This design allows the user to easily and accurately control the rotation speed and direction of the lead screw 8, thereby achieving fine adjustment of the position of the inner support top plate 4.

[0034] In another embodiment, in order to ensure that the inner support top plate 4 can always maintain a stable support state during vibration detection, a locking nut 7 located at the rear end of the moving seat 6 is threadedly connected to the lead screw 8. After the inner support top plate 4 tightly supports the inner wall of the pipeline, the user only needs to rotate the locking nut 7 to make it close to the moving seat 6 and lock one end of the moving seat 6, which can effectively prevent the problem of tight failure during vibration.

[0035] Finally, in order to further improve the adaptability and stability of the device, the number of inner support top plates 4 is set to six. The part of the inner support top plate 4 in contact with the pipeline is designed as a circular arc with anti-skid grooves, which ensures that the inner support top plate 4 can be tightly fitted with the inner wall of the pipeline after being tightened, and not only has good stability, but also is not easy to fall off. In actual application, the user can pre-adjust the position of the inner support top plate 4 according to the inner diameter of the pipeline to be detected, so that the whole device does not shake greatly when put into the pipeline, thereby facilitating the further adjustment and fixation of the inner support top plate 4.

[0036] In actual application, first, the initial position of the inner support top plate 4 needs to be pre-adjusted according to the inner diameter of the pipeline to be detected. By rotating the hand wheel 9, the lead screw 8 can be driven to rotate. The rotation of the lead screw 8 further drives the moving seat 6 to move towards one end of the motor bottom plate seat 2. With the movement of the moving seat 6, the included angle between the inner connecting rod 3 and the outer connecting rod 5 gradually decreases, thereby driving the plurality of inner support top plates 4 to expand outward synchronously. When the inner support top plate 4 expands outward to the appropriate position, that is, the diameter of the support circle formed after the expansion of the inner support top plate 4 is slightly smaller than the inner diameter of the pipeline to be detected, it can be ensured that the whole device does not shake greatly when put into the pipeline, thereby facilitating the further precise adjustment of the inner support top plate 4.

[0037] Next, the whole device is put into the pipeline to be detected. At this time, the hand wheel 9 needs to be continuously rotated to drive the lead screw 8 to further rotate. With the rotation of the lead screw 8, the plurality of inner support top plates 4 expand outward synchronously until their support surfaces are tightly fitted with the inner wall of the pipeline. Since the support surface of the inner support top plate 4 is limited by the inner wall of the pipeline, it cannot rotate freely. When the plurality of inner support top plates 4 are tightly supported against the inner wall of the pipeline, the locking nut 7 needs to be rotated to approach the moving seat 6 and lock one end of the moving seat 6, so as to prevent the tightening from failing during the vibration detection process.

[0038] After the device is fixed, the vibration motor 1 can be started to detect the pipeline. The optical cable arranged in the pipeline can accurately capture the subtle vibration differences caused by vibration, and through advanced signal processing technology and optical phase demodulation technology, accurate positioning and detection of pipeline disconnection and other defects can be realized. Through these technical means, the quality status of the pipeline can be accurately judged.

[0039] The above describes the utility model and its implementation mode, which is not restrictive, and the drawings only show one of the implementation modes of the utility model, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structural modes and embodiments can be designed without creativity, which shall belong to the protection scope of the utility model.

Claims

1. A high-efficiency stable distributed optical fiber rain sewer defect detection excitation device, characterized in that: it comprises a vibration motor (1), an adjusting member, and a plurality of inner support top plates (4); the vibration motor (1) is fixed to one end of the adjusting mechanism; a plurality of the inner support top plates (4) are circumferentially distributed around the adjusting member through a connecting rod assembly; the adjusting member drives the connecting rod assembly to drive a plurality of the inner support top plates (4) to expand outward synchronously to support the inner wall of the pipeline.

2. The high-efficiency stable distributed optical fiber rainwater and sewage pipe defect detection excitation device according to claim 1, characterized in that: the adjusting member comprises a motor base (2), a lead screw (8), and a moving seat (6), one side of the motor base (2) is fixed with the vibration motor (1), the lead screw (8) is rotatably arranged on the side of the motor base (2) away from the vibration motor (1) through a bearing, and the moving seat (6) is threadedly connected to the lead screw (8) through an internally built lead screw nut (10); the connecting rod assembly comprises an inner connecting rod (3) and an outer connecting rod (5), one end of the inner connecting rod (3) and the outer connecting rod (5) is rotatably connected with the inner support top plate (4) through a common pin shaft, and the other end of the inner connecting rod (3) and the outer connecting rod (5) away from the inner support top plate (4) is rotatably connected with the motor base (2) and the moving seat (6) respectively.

3. The high-efficiency stable distributed optical fiber rainwater pipe defect detection excitation device according to claim 2, characterized in that: the lead screw (8) has trapezoidal teeth.

4. The high-efficiency stable distributed optical fiber rainwater pipe defect detection excitation device according to claim 3, characterized in that: the end of the lead screw (8) away from the motor base (2) is provided with a hand wheel (9).

5. The high-efficiency stable distributed optical fiber rain sewer pipeline defect detection excitation device according to claim 4, characterized in that: the lead screw (8) is threadedly connected with a locking nut (7) located at the rear end of the moving seat (6).

6. The high-efficiency stable distributed optical fiber rain sewer pipeline defect detection excitation device according to claim 1 or 2, characterized in that: the number of the inner support top plates (4) is six.

7. The high-efficiency stable distributed optical fiber rain sewer pipeline defect detection excitation device according to claim 6, characterized in that: the contact surface of the inner support top plate (4) with the inner wall of the pipeline is a circular arc with anti-skid grooves.

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