An overhauling structure for expansion joint and expansion joint

Abstract

The utility model provides a kind of for the overhauling structure and expansion joint of expansion joint, the expansion joint includes bellows and intermediate pipe assembly, the overhauling structure includes access hole subassembly and visual monitoring subassembly, access hole subassembly is set on the intermediate pipe assembly of expansion joint, can open or close the internal space formed by bellows and intermediate pipe assembly, the visual monitoring subassembly is set on access hole subassembly, the visual monitoring subassembly at least partially extends into bellows inside, for monitoring bellows inside state. This structure can realize to carry out overhauling to bellows inside and carry out online monitoring and evaluation to operating state, reduce the risk of expansion joint damage failure.

Description

Technical Field

[0001] This utility model relates to the field of pressure pipeline technology, and more specifically, to a maintenance structure for expansion joints and an expansion joint. Background Technology

[0002] Corrugated expansion joints are important flexible compensation devices in pressure piping systems. They effectively compensate for thermal and mechanical deformation of pipelines, thereby reducing pipeline stress and extending their service life. Figure 1 The compound universal hinge pressure-balanced expansion joint shown consists of two sets of working bellows, one set of balancing bellows, hinge plate assembly, guide tube, intermediate pipe assembly and other structural components. It is mainly used to absorb axial displacement and lateral displacement in any plane, and can balance the pressure thrust of the bellows.

[0003] During routine maintenance after plant shutdown, the outer surface of the bellows is typically inspected and maintained by removing the protective cover. However, this method not only increases maintenance time and costs but also raises the risk of damage to the bellows during removal, while failing to monitor and assess the internal condition of the bellows. Furthermore, with long-term operation of the plant, the semi-enclosed annular cavity inside the bellows easily accumulates media, which is difficult to thoroughly clean during maintenance, further increasing the likelihood of corrosion and damage to the bellows.

[0004] Chinese patent CN109654483A discloses a method and apparatus for rapid maintenance of the expansion joint of a circulating fluidized bed boiler return feeder. This maintenance apparatus includes a rectangular hole located above the expansion joint of the return feeder. The rectangular hole is used to remove burnt castable, install casting templates, and serve as a casting channel, enabling rapid maintenance of the expansion joint. However, its design is not airtight, has limited functionality, and is not suitable for pressure-balanced expansion joints.

[0005] Therefore, a maintenance structure for expansion joints is needed to meet the maintenance requirements of expansion joints. Utility Model Content

[0006] The purpose of this invention is to provide a maintenance structure and expansion joint for expansion joints, enabling the internal maintenance of bellows and online monitoring and evaluation of its operating status, thereby reducing the risk of expansion joint damage and failure.

[0007] To achieve the above objectives, this utility model provides a maintenance structure for expansion joints and an expansion joint itself. The technical solution of this utility model is implemented as follows:

[0008] An inspection structure for an expansion joint, the expansion joint including a bellows and an intermediate tube assembly, the inspection structure including an inspection hole assembly and a visual monitoring assembly, the inspection hole assembly being disposed on the intermediate tube assembly of the expansion joint, capable of opening or closing the internal space formed by the bellows and the intermediate tube assembly, the visual monitoring assembly being disposed on the inspection hole assembly, the visual monitoring assembly extending at least partially into the bellows for monitoring the internal state of the bellows.

[0009] Furthermore, the inspection port assembly includes an inspection port, a flange, a flange cover, and a connector. The inspection port is disposed through the intermediate pipe assembly. The flange and the inspection port form a channel connecting the inside and outside of the bellows. The flange is sealed to the intermediate pipe assembly, and the flange cover is sealed to the flange via the connector. The inspection port assembly provides an entrance and exit for maintenance operations and provides physical support for the visual monitoring assembly.

[0010] Furthermore, the visual monitoring component includes a visual probe, a maintenance connection pipe, and a control device. The maintenance connection pipe passes through a channel formed by a flange and a maintenance hole. The visual probe and the control device are located at opposite ends of the maintenance connection pipe. The visual probe is located inside the bellows, and the control device is located outside the bellows. The visual probe and the control device are communicatively connected. The visual monitoring component provides field-of-view support for maintenance and provides real-time test data to the system.

[0011] Furthermore, a mounting hole is provided in the middle of the flange cover, through which the maintenance connection pipe passes and is sealed to the mounting hole of the flange cover. This arrangement allows the visual probe to obtain the field of view inside the bellows, providing support for maintenance.

[0012] Furthermore, the inspection structure also includes a maintenance component, which is detachably mounted on the access panel assembly. The maintenance component works in conjunction with the visual monitoring component to perform tasks such as inspection, cleaning, and maintenance.

[0013] Furthermore, the visual probe includes an imaging module for capturing and recording image information of the expansion joint, providing visual inspection conditions.

[0014] Furthermore, the visual probe includes a testing module for testing status data values ​​such as displacement, temperature, pressure, and vibration, facilitating real-time monitoring and expansion joint maintenance.

[0015] Furthermore, the maintenance connection pipe is an adjustable structure that can change the support position and angle, allowing the visual probe to be placed at the required position and angle.

[0016] Furthermore, the maintenance connection pipe has a built-in cable that connects the visual probe and the control device, so that the data collected by the visual probe can be transmitted to the control device through the cable, and the control command information can be transmitted to the visual probe at the same time.

[0017] An expansion joint having the aforementioned maintenance structure.

[0018] Compared with the prior art, the maintenance structure and expansion joint of this utility model have the following advantages:

[0019] (1) An inspection hole is opened on the intermediate pipe assembly and an inspection hole assembly is added for inspection and maintenance work inside the bellows, reducing the risk of expansion joint damage and failure.

[0020] (2) Add a visual monitoring component, which can be used for visual monitoring of the internal status of the bellows during the start-up of the pipeline system, and realize non-stop monitoring of the expansion joint.

[0021] (3) Add a maintenance component, which, in conjunction with the visual monitoring component, enables inspection, cleaning and maintenance of the expansion joint. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the maintenance structure of the expansion joint described in Embodiment 1 of this utility model;

[0023] Figure 2 This is a schematic diagram of the inspection hole assembly and visual monitoring assembly described in Embodiment 1 of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Imported pipe assembly; 2. Hinge plate assembly one; 3. Protective cover one; 4. Protective cover two; 5. Working bellows; 6. Flow guide tube one; 7. Intermediate pipe assembly; 8. Hinge plate assembly two; 9. Protective cover three; 10. Balanced bellows; 11. Protective cover four; 12. Inspection hole assembly; 13. Flow guide tube two; 14. Visual monitoring assembly; 121. Flange; 122. Flange cover; 123. Fixing bolt; 124. Fixing nut; 141. Visual probe; 142. Inspection connection pipe; 143. Control equipment. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only some, not all, of the embodiments of this utility model. The specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. It should be noted that, unless otherwise specified, the embodiments and features described in the present utility model can be combined with each other.

[0027] Example 1

[0028] An inspection structure for an expansion joint, the expansion joint including a bellows and an intermediate tube assembly 7, the inspection structure including an inspection hole assembly 12 and a visual monitoring assembly 14, the inspection hole assembly 12 being disposed on the intermediate tube assembly 7 of the expansion joint, capable of opening or closing the internal space formed by the bellows and the intermediate tube assembly 7, the visual monitoring assembly 14 being disposed on the inspection hole assembly 12, the visual monitoring assembly 14 extending at least partially into the bellows for monitoring the internal state of the bellows.

[0029] like Figure 1 As shown, the compound universal hinge pressure-balanced expansion joint includes an inlet pipe assembly 1, a hinge plate assembly 1 2, a protective cover 1 3, a protective cover 2 4, a working bellows 5, a guide tube 1 6, an intermediate pipe assembly 7, a hinge plate assembly 2 8, a protective cover 3 9, a balance bellows 10, a protective cover 4 11, an inspection hole assembly 12, a guide tube 2 13, and a visual monitoring assembly 14. Preferably, the inspection structure is applied to the balance bellows 10, which has a relatively large internal space. Depending on the specific spatial structure and requirements of the expansion joint, the working bellows 5 can also be similarly configured. The number of inspection structures can be one or more sets.

[0030] The access port assembly 12 includes an access port, a flange 121, a flange cover 122, and connectors. The access port assembly 12 provides an entrance and exit for maintenance operations and provides physical support for the visual monitoring assembly 14.

[0031] The inspection port is perforated in the intermediate pipe assembly 7. The flange 121 and the inspection port form a channel connecting the inside and outside of the bellows. The diameter of the inspection port matches the inner diameter of the flange 121. Preferably, the inspection port is circular. Maintenance tools / personnel can enter the bellows through the inspection port to perform maintenance operations. The inspection port can also serve as a placement and retrieval port for a maintenance robot. The maintenance robot is deployed into the bellows through the inspection port, and maintenance personnel operate the robot from the outside, guiding internal condition inspection and assessment, sealing performance testing, internal structural cleaning and maintenance, and other tasks.

[0032] The flange 121 is sealed to the intermediate pipe assembly 7 to prevent internal liquid leakage. For example... Figure 2 As shown, flange 121 and intermediate pipe assembly 7 are fixed by welding.

[0033] The flange cover 122 and flange 121 are sealed together by a connector. A sealing ring can be added between flange 121 and flange cover 122 to ensure a good seal. When the vehicle is parked, flange cover 122 can be removed for maintenance through the access panel. Figure 2 As shown, the connector is a bolted connection, including a fixing bolt 123 and a fixing nut 124.

[0034] The visual monitoring component 14 can be located on the flange 121 or on the flange cover 122. Preferably, a mounting hole is provided in the middle of the flange cover 122 for mounting the visual monitoring component 14.

[0035] The visual monitoring component 14 includes a visual probe 141, a maintenance connection pipe 142, and a control device 143. The visual monitoring component 14 provides field-of-view support for maintenance and provides real-time test data to the system. The maintenance connection pipe 142 passes through the channel formed by the flange 121 and the maintenance hole. The visual probe 141 and the control device 143 are located at opposite ends of the maintenance connection pipe 142. The visual probe 141 is located inside the bellows, and the control device 143 is located outside the bellows; the visual probe 141 and the control device 143 are communicatively connected. The visual monitoring component 14 provides field-of-view support for maintenance and provides real-time test data to the system. Additional visual probes 141 can also be installed outside the bellows; the number can be set to one or more sets depending on actual needs.

[0036] The visual probe 141 includes an imaging module, which integrates one or more of various technical modes such as optical imaging and ultrasonic imaging, and is used to capture and record image information of the expansion joint to provide visual inspection conditions.

[0037] The visual probe 141 also includes a testing module for testing status data values ​​such as displacement, temperature, pressure, and vibration, which facilitates real-time monitoring and expansion joint maintenance.

[0038] like Figure 2 As shown, the maintenance connection pipe 142 passes through the maintenance hole assembly 12, the visual probe 141 is placed inside the bellows, and the control device 143 is located outside the bellows. Preferably, a mounting hole is provided in the middle of the flange cover 122, and the maintenance connection pipe 142 passes through the mounting hole through the flange cover 122. Through the channel formed by the maintenance hole and the flange 121, the visual probe 141 is placed inside the bellows, and the control device 143 is located outside the flange cover 122. This arrangement allows the visual probe 141 to obtain the field of view inside the bellows, providing support for maintenance. The maintenance connection pipe 142 is sealed to the mounting hole of the flange cover 122 to prevent internal liquid leakage.

[0039] The maintenance connection pipe 142 is an adjustable structure that can change the support position and angle, and is used to place the visual probe 141 in the required position and angle.

[0040] The maintenance connection pipe 142 has a built-in cable that connects the visual probe 141 and the control device 143, so that the data collected by the visual probe 141 can be transmitted to the control device 143 through the cable, and at the same time, the control command information can be transmitted to the visual probe 141.

[0041] The control device 143 provides control command information to the visual probe 141 and performs comprehensive processing on the feedback information from the visual probe 141.

[0042] The maintenance structure also includes a maintenance component, which is detachably mounted on the access panel assembly 12. The maintenance component works in conjunction with the visual monitoring assembly 14 to perform tasks such as inspection, cleaning, and maintenance. The maintenance component includes maintenance devices such as a mobile robotic arm, achieving multi-functional integration of inspection, maintenance, and cleaning. Maintenance personnel operate the robotic arm externally to perform inspection, cleaning, or maintenance.

[0043] The following are four typical working sections of the maintenance structure:

[0044] Working Section 1: When the pipeline system is shut down, disconnect the connection between flange 121 and flange cover 122, open flange cover 122, and maintenance personnel can enter the bellows through the passage formed by flange 121 and the inspection hole to operate inside. The visual monitoring component 14 is installed on flange 121 to provide a visual environment and monitoring data inside and outside the bellows, enabling maintenance personnel to personally inspect and repair the internal condition of the bellows.

[0045] Working Section 2: When the pipeline system is shut down, maintenance personnel disconnect the connection between flange 121 and flange cover 122, open flange cover 122, and install the robotic arm and other maintenance components onto the flange 121 wall or flange cover 122. The maintenance components are then inserted into the bellows through the channel formed by flange 121 and the inspection port. Finally, the connection between flange 121 and flange cover 122 is reconnected. The visual monitoring component 14 provides a visual environment and monitoring data. Maintenance personnel operate the maintenance components and control equipment 143 externally for inspection and maintenance.

[0046] Working Section 3: When the piping system is shut down, maintenance personnel disconnect the connection between flange 121 and flange cover 122, open flange cover 122, and deploy the maintenance robot into the bellows through the inspection port. The visual monitoring component 14 provides a visual view and monitoring data. Maintenance personnel operate the robot and control equipment 143 externally, and the robot performs inspections and maintenance.

[0047] Working section 4: The visual probe 141 is fixedly installed inside the bellows of the maintenance connection pipe 142. The maintenance connection pipe 142 is sealed to the flange cover 122, and the flange 121 is sealed to the flange cover 122. When the pipeline system is in operation, the imaging module of the visual probe 141 provides visual environmental conditions and provides real-time imaging. The testing module of the visual probe 141 measures various environmental parameters in real time, and the control equipment 143 monitors and records data in real time. The visual probe 141 allows for real-time observation and measurement of the internal condition of the bellows, and the images and test data are transmitted back to the control center, reducing system shutdowns due to maintenance.

[0048] An expansion joint, including the aforementioned maintenance structure.

[0049] It should be noted that all terms used in this utility model to indicate direction and position, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "top", "low", etc., are only used to explain the relative positional relationship and connection between the components in a specific state, and are only for the convenience of describing this utility model, and are not required to require this utility model to be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A maintenance structure for an expansion joint, the expansion joint comprising a bellows and an intermediate pipe assembly (7), characterized in that, The maintenance structure includes an inspection hole assembly (12) and a visual monitoring assembly (14). The inspection hole assembly (12) is disposed on the intermediate tube assembly (7) of the expansion joint and can open or close the internal space formed by the bellows and the intermediate tube assembly (7). The visual monitoring assembly (14) is disposed on the inspection hole assembly (12) and extends at least partially into the bellows for monitoring the internal state of the bellows.

2. The maintenance structure according to claim 1, characterized in that, The inspection hole assembly (12) includes an inspection hole, a flange (121), a flange cover (122), and a connector. The inspection hole is disposed through the intermediate pipe assembly (7). The flange (121) and the inspection hole form a channel connecting the inside and outside of the bellows. The flange (121) is sealed to the intermediate pipe assembly (7). The flange cover (122) is sealed to the flange (121) through the connector.

3. The maintenance structure according to claim 2, characterized in that, The visual monitoring component (14) includes a visual probe (141), a maintenance connection pipe (142), and a control device (143). The maintenance connection pipe (142) passes through the channel formed by the flange (121) and the maintenance hole. The visual probe (141) and the control device (143) are located at opposite ends of the maintenance connection pipe (142). The visual probe (141) is located inside the bellows, and the control device (143) is located outside the bellows. The visual probe (141) and the control device (143) are communicatively connected.

4. The maintenance structure according to claim 3, characterized in that, An installation hole is provided in the middle of the flange cover (122), and the maintenance connection pipe (142) passes through the flange cover (122) through the installation hole, and the maintenance connection pipe (142) is sealed to the installation hole of the flange cover (122).

5. The maintenance structure according to claim 1, characterized in that, The inspection structure also includes a maintenance component, which is detachably mounted on the inspection hole assembly (12).

6. The maintenance structure according to claim 3, characterized in that, The visual probe (141) includes an imaging module for capturing and recording image information of the expansion joint.

7. The maintenance structure according to claim 3, characterized in that, The visual probe (141) includes a test module for testing status data values.

8. The maintenance structure according to claim 3, characterized in that, The maintenance connection pipe (142) is an adjustable structure used to position the visual probe (141) at the required position and angle.

9. The maintenance structure according to claim 3, characterized in that, The inspection connection pipe (142) has a built-in cable that connects the visual probe (141) and the control device (143).

10. An expansion joint, characterized in that, The expansion joint is provided with the maintenance structure as described in any one of claims 1 to 9.

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