Rain and sewage pipeline defect detection vibration excitation device based on distributed optical fibers

Abstract

The utility model discloses a rain and sewage pipeline defect detection vibration excitation device based on distributed optical fibers, the rain and sewage pipeline defect detection vibration excitation device comprises a vibration motor, a fixing mechanism and an inner supporting mechanism, the vibration motor is connected with the inner supporting mechanism through the fixing mechanism, and the inner supporting mechanism comprises a supporting main body, a bottom supporting plate and an upper supporting plate; the bottom supporting plate is fixed to the lower end of the supporting body and used for supporting the bottom of the inner wall of the pipeline, and the upper supporting plate is placed at the upper end of the supporting body and supports the top of the inner wall of the pipeline under the adjusting effect of the supporting body. Compared with the prior art, the vibration excitation device has the advantages that the screw rod, the lengthened adjusting hexagon nut, the locking hexagon nut and other parts are adopted, accurate adjustment and stable fixation of the height of the upper supporting plate are achieved, and the problems that an existing vibration excitation device is prone to loosening and poor in stability in pipeline detection are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline defect detection technical field, specifically point to a kind of rain and sewage pipeline defect detection excitation device based on distributed optical fiber. BACKGROUND

[0002] With the rapid development of urbanization, underground pipe network system is increasingly complex and dense, becoming an important part of urban infrastructure. These pipeline systems bear the transportation tasks of water, natural gas, oil and other key resources, and their safety and operational efficiency are directly related to the normal operation of the city and the quality of life of residents. However, due to construction quality, natural aging, external environmental erosion, uneven settlement of foundation and third-party construction activities and other factors, pipeline systems face a variety of potential damage risks, especially rain and sewage pipes, which often have defects such as disconnection and misalignment.

[0003] If these defects are not discovered and repaired in time, not only will it result in a huge waste of resources, but also may cause serious environmental pollution and safety accidents. Therefore, it is particularly important to regularly and efficiently detect and maintain pipeline systems. Traditional detection methods often rely on manual inspection or external detection equipment, but these methods have problems such as long detection period, low efficiency and difficulty in detecting hidden defects.

[0004] In recent years, with the continuous development of distributed optical fiber sensing technology, its application in pipeline detection field is increasingly widespread. Distributed optical fiber sensing technology has the advantages of wide detection range, high sensitivity and accurate positioning, and can detect changes in internal vibration signals of the pipeline to determine whether the pipeline has defects. However, in order to more effectively utilize distributed optical fiber sensing technology for pipeline defect detection, an excitation device is needed to excite the vibration of the pipeline so that the internal defects of the pipeline can be identified by observing the vibration signals.

[0005] Existing excitation devices mostly have problems such as complex structure, inconvenient installation and poor stability, especially in the complex and variable rain and sewage pipeline environment, it is difficult to ensure the excitation effect and detection accuracy. Therefore, it is of great significance to develop a rain and sewage pipeline excitation device with simple structure, convenient installation and good stability for improving the efficiency and accuracy of rain and sewage pipeline defect detection. SUMMARY

[0006] In order to solve the above problems, the application provides a rain and sewage pipeline defect detection excitation device based on distributed optical fiber. In order to solve the above technical problems, the utility model provides a technical scheme for a rain and sewage pipeline defect detection excitation device based on distributed optical fiber, which comprises a vibration motor, a fixing mechanism and an inner support mechanism, the vibration motor is connected with the inner support mechanism through the fixing mechanism, the inner support mechanism comprises a support main body, a bottom support plate and an upper support plate, the bottom support plate is fixed with the lower end of the support main body and is used for supporting the bottom of the inner wall of the pipeline, and the upper support plate is placed on the upper end of the support main body and supports the top of the inner wall of the pipeline under the adjustment of the support main body.

[0007] Further, the support main body comprises a screw rod arranged above the bottom support plate.

[0008] Further, the upper end of the screw rod is threadedly connected with an elongated adjusting hexagonal nut, and the lower part of the upper support plate is provided with a top supporting opening corresponding to the elongated adjusting hexagonal nut, and the upper end of the elongated adjusting hexagonal nut can be screwed into the top supporting opening.

[0009] Further, the screw rod is threadedly connected with a locking hexagonal nut below the elongated adjusting hexagonal nut.

[0010] Further, the bottom of the bottom support plate is processed with a counterbore, the bottom end of the screw rod is provided with an internal thread hole matched with the counterbore, and the counterbore is built-in with an internal hexagonal screw threadedly connected with the internal thread hole.

[0011] Further, the screw rod is threadedly connected with an elongated locking hexagonal nut above the bottom support plate, and the bottom support plate is provided with a clamping groove corresponding to the elongated locking hexagonal nut.

[0012] Further, the support surfaces of the bottom support plate and the upper support plate are both arc-shaped.

[0013] Further, the materials of the bottom support plate and the upper support plate are both POM plastic.

[0014] Further, the fixing mechanism comprises a clamping plate and a motor base for fixing the vibration motor, the clamping plate and the motor base are respectively clamped on the front and rear sides of the screw rod, and the clamping plate and the motor base are connected through fixing screws.

[0015] Further, the opposite sides of the motor base and the clamping plate are both provided with V-shaped grooves for clamping the screw rod.

[0016] Compared with existing technologies, this application offers a pipeline vibration excitation device that is simple in structure, easy to install, and highly stable. Through a carefully designed internal support and fixing mechanism, the device's adaptability and stability in complex stormwater and sewage pipeline environments are ensured. In particular, the use of components such as screws, extended adjusting hexagonal nuts, and locking hexagonal nuts enables precise adjustment and stable fixing of the upper support plate height, effectively solving the problems of loosening and poor stability in existing vibration excitation devices during pipeline inspection. Furthermore, the arc-shaped design of the bottom and upper support plates and the selection of POM plastic material further enhance the device's applicability, reliability, and pipeline protection. This vibration excitation device can efficiently excite pipeline vibration, and in conjunction with distributed fiber optic sensing technology, it enables accurate identification and location of defects in stormwater and sewage pipelines, significantly improving the efficiency and accuracy of defect detection in these pipelines. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this application.

[0018] Figure 2 This is a schematic diagram of the internal cross-sectional structure of this application.

[0019] Figure 3 This is a schematic diagram showing the installation details of the vibration motor in this application.

[0020] Figure 4 This is a schematic diagram of the pipe being tightly sealed inside in this application.

[0021] As shown in the figure: 1. Vibration motor, 2. Support body, 3. Bottom support plate, 4. Upper support plate, 5. Screw, 6. Extended adjusting hexagonal nut, 7. Top support opening, 8. Locking hexagonal nut, 9. Socket hex screw, 10. Clamping plate, 11. Motor base, 12. V-groove, 13. Extended locking hexagonal nut. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0025] Furthermore, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the scope of protection required by the present application.

[0026] Referring to the drawings Figure 1 - the drawings Figure 3 The application provides a rain and sewage pipeline defect detection excitation device based on distributed optical fiber, which comprises a vibration motor 1, a fixing mechanism and an inner support mechanism, the vibration motor 1 is connected with the inner support mechanism through the fixing mechanism, the inner support mechanism comprises a support main body 2, a bottom support plate 3 and an upper support plate 4, the bottom support plate 3 is fixed with the lower end of the support main body 2 and is used for supporting the bottom of the inner wall of the pipeline, and the upper support plate 4 is placed on the upper end of the support main body 2 and supports the top of the inner wall of the pipeline under the adjustment of the support main body 2.

[0027] In one specific embodiment, the support main body 2 comprises screw rods 5 arranged above the bottom support plate 3. These screw rods 5 not only serve as key components for connection and adjustment, but also endow the device with high adaptability and stability. Further, in order to realize precise adjustment of the height of the upper support plate 4, the upper end of the screw rod 5 is ingeniously designed with an elongated adjusting hexagon nut 6. The lower part of the upper support plate 4 is provided with a top supporting opening 7 that perfectly matches the elongated adjusting hexagon nut 6. When the elongated adjusting hexagon nut 6 is tightened, its upper end can be smoothly screwed into the top supporting opening 7, thereby effectively jacking up the upper support plate 4 until it closely fits the top of the inner wall of the pipeline. In order to ensure the stability after adjustment, a locking hexagon nut 8 is threadedly connected to the screw rod 5 below the elongated adjusting hexagon nut 6, which effectively prevents loosening that may occur during vibration.

[0028] In another optimization point, the bottom of the bottom support plate 3 is carefully machined with a counterbore, while the bottom end of the screw rod 5 is equipped with a matching internal threaded hole. By rotating the hexagonal socket head cap screw 9 into the counterbore and tightly connecting with the internal threaded hole, the firm fixation of the bottom support plate 3 and the screw rod 5 is achieved. In addition, in order to further improve the stability, the screw rod 5 is also threadedly connected with the lengthened locking hexagonal nut 13 above the bottom support plate 3, and the bottom support plate 3 is provided with a corresponding clamping groove. In this application, the lengthened locking hexagonal nut 13 pushes down to tighten the bottom support plate 3, which can prevent the hexagonal socket head cap screw 9 from loosening with the bottom support plate 3 during vibration.

[0029] In order to improve the applicability and stability of the device, the support surfaces of the bottom support plate 3 and the upper support plate 4 are designed as circular arcs. This design ensures that they are perfectly matched with the inner wall of the pipeline after being tightened, not only improving the stability, but also reducing the risk of pipeline damage caused by vibration. It is worth mentioning that the bottom support plate 3 and the upper support plate 4 are made of POM plastic material, which not only ensures the frictional vibration along the longitudinal direction of the pipeline, but also prevents the bottom support plate 3 and the upper support plate 4 from being sheared along the longitudinal direction of the pipeline, and prevents damage to the pipeline during vibration.

[0030] Referring to the accompanying drawings Figure 4 The fixing mechanism, as the key to connecting the vibration motor 1 and the inner support mechanism, is also crucial in design. It includes a clamping plate 10 and a motor base 11 specially used for fixing the vibration motor 1. The clamping plate 10 and the motor base 11 are clamped on the front and rear sides of the screw rod 5 respectively and are tightly connected together by fixing screws. In order to further improve the stability of the connection, the opposite sides of the motor base 11 and the clamping plate 10 are designed with V-shaped grooves 12 for clamping the screw rod 5, which ensures the stability and accuracy of the vibration motor 1 during vibration.

[0031] In practical application, first, the locking hex nut 8 and the lengthened adjusting hex nut 6 are screwed on the screw rod 5 in advance, and the top supporting mouth 7 below the upper supporting plate 4 is clamped on the upper end of the screw rod 5 to assemble. Subsequently, the whole device is placed into the pipeline inlet to be detected, and the bottom supporting plate 3 is previously supported with the bottom of the pipeline inner wall. At this time, a certain adjusting space is left between the upper supporting plate 4 and the top of the pipeline inner wall. By rotating the lengthened adjusting hex nut 6 with a wrench, the lengthened adjusting hex nut 6 can be moved upward and jacked up the upper supporting plate 4 until the upper supporting plate 4 is tightly attached to the top of the pipeline inner wall. At the same time, the bottom supporting plate 3 will move downward relatively in the process of the upper supporting plate 4 being tightly attached, so as to tightly attach the bottom of the pipeline inner wall. Finally, the locking hex nut 8 is rotated with a wrench to limit and lock the lower end of the lengthened adjusting hex nut 6, so as to ensure that the lengthened adjusting hex nut 6 will not be loose in the vibration process. After all the fixing steps are completed, the vibration motor 1 can be started to vibrate and detect the pipeline. The optical cable arranged in the pipeline can capture the subtle vibration difference, and by means of the advanced signal processing technology and optical phase demodulation technology, the accurate positioning and detection of the pipeline disengagement and other defects are realized, so as to judge the quality condition of the pipeline.

[0032] The above describes the utility model and its implementation mode, and this description is not restrictive, and the embodiment shown in the drawings is only one of the utility model, and the actual structure is not limited thereto. In summary, if the ordinary skilled person in the art is inspired, without departing from the utility model creation purpose, without creative design, the similar structure mode and embodiment of the technical scheme should belong to the protection scope of the utility model.

Claims

1. A vibration excitation device for detecting defects in rainwater and sewage pipes based on distributed optical fibers, characterized in that, It includes a vibration motor (1), a fixing mechanism and an inner support mechanism. The vibration motor (1) is connected to the inner support mechanism through the fixing mechanism. The inner support mechanism includes a support body (2), a bottom support plate (3) and an upper support plate (4). The bottom support plate (3) is fixed to the lower end of the support body (2) and is used to support the bottom of the inner wall of the pipe. The upper support plate (4) is placed on the upper end of the support body (2) and supports the top of the inner wall of the pipe under the adjustment of the support body (2).

2. The vibration excitation device for detecting defects in rainwater and sewage pipes based on distributed optical fibers according to claim 1, characterized in that, The supporting body (2) includes a screw (5) disposed above the bottom support plate (3).

3. The vibration excitation device for detecting defects in rainwater and sewage pipes based on distributed optical fibers according to claim 2, characterized in that, The upper end of the screw (5) is threaded with an extended adjusting hexagonal nut (6), and the lower part of the upper support plate (4) is provided with a top support opening (7) corresponding to the extended adjusting hexagonal nut (6), and the upper end of the extended adjusting hexagonal nut (6) can be screwed into the top support opening (7).

4. The vibration excitation device for detecting defects in rainwater and sewage pipes based on distributed optical fibers according to claim 3, characterized in that, The screw (5) is threaded with a locking hexagonal nut (8) located below the extended adjusting hexagonal nut (6).

5. The vibration excitation device for detecting defects in rainwater and sewage pipes based on distributed optical fibers according to claim 2, characterized in that, The bottom support plate (3) has a countersunk hole at its bottom, and the bottom end of the screw (5) is provided with a matching internal thread hole. An internal hexagon screw (9) that is threadedly connected to the internal thread hole is inserted into the countersunk hole.

6. The vibration excitation device for detecting defects in rainwater and sewage pipes based on distributed optical fibers according to claim 5, characterized in that, The screw (5) is threaded with an extended locking hexagonal nut (13) located above the bottom support plate (3), and the bottom support plate (3) is provided with a slot corresponding to the extended locking hexagonal nut (13).

7. A vibration excitation device for detecting defects in rainwater and sewage pipes based on distributed optical fibers according to any one of claims 1-6, characterized in that, The support surfaces of the bottom support plate (3) and the upper support plate (4) are both arc-shaped.

8. The vibration excitation device for detecting defects in rainwater and sewage pipes based on distributed optical fibers according to claim 7, characterized in that, The bottom support plate (3) and the upper support plate (4) are both made of POM plastic.

9. The vibration excitation device for detecting defects in rainwater and sewage pipes based on distributed optical fibers according to claim 2, characterized in that, The fixing mechanism includes a clamping plate (10) and a motor base (11) for fixing the vibration motor (1). The clamping plate (10) and the motor base (11) are respectively clamped on the front and rear sides of the screw (5), and the clamping plate (10) and the motor base (11) are connected by fixing screws.

10. The vibration excitation device for detecting defects in rainwater and sewage pipes based on distributed optical fibers according to claim 9, characterized in that, The motor base (11) and the clamping plate (10) are both provided with V-grooves (12) for holding the screw (5).

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