Power station boiler maintenance pipeline

Abstract

The utility model discloses a power plant boiler maintenance pipeline, and relates to the technical field of power plant boiler maintenance, the power plant boiler maintenance pipeline comprises a pipeline A, one end of the pipeline A is sleeved with a flange plate A, the surface of the flange plate A is fixedly connected with a limiting ring, and one end of the pipeline A penetrates through the interior of the flange plate A and is connected with an inner pipe in a penetrating mode. According to the power plant boiler overhaul pipeline, a fixing ring and a limiting ring in the connecting assembly are matched, a spring is used for driving a limiting ball to be embedded into a mechanical locking structure of a limiting hole, automatic positioning during pre-butt joint of the pipeline is achieved, and the axis deviation of the pipeline A and the pipeline B can be controlled within a small error range by combining the sleeving design of a flange plate A and a flange plate B; the disassembly and assembly time is greatly shortened, a composite connection mode of the elastic limiting ball and the threaded bolt is adopted, the limiting ball can be released or locked only by rotating the fixing ring by 45 degrees during operation, and complete tool-free operation is achieved in cooperation with the pre-compression design of the elastic sealing ring.

Description

Technical Field

[0001] This utility model relates to the field of power plant boiler maintenance technology, specifically a power plant boiler maintenance pipeline. Background Technology

[0002] Power plants typically include four main pipelines: main steam pipeline, reheat hot section steam pipeline, reheat cold section steam pipeline, and main feedwater pipeline. All types of pipelines require regular maintenance during use or after a period of time.

[0003] In the prior art, such as in publication number CN221525918U, a power plant boiler maintenance pipeline is disclosed, which includes two pipeline bodies, a connecting pipe, and two sleeves. A bypass pipe is connected between the pipeline bodies. A first valve is provided on the bypass pipe. Both ends of the connecting pipe are provided with pipe openings protruding from the outer diameter of the connecting pipe. One end of the sleeve is provided with a seal that engages with the pipe opening. The sleeve is fitted onto both ends of the connecting pipe and is slidably connected to the connecting pipe. A second valve is provided at the end of the pipeline body. The second valve is located between the bypass pipes. Both ends of the pipeline body are threadedly connected to the two sleeves respectively.

[0004] Although the aforementioned patented technology connects the pipes via a bypass pipe, eliminating the need for production shutdowns and ensuring continued production, and allows for the removal of the connecting pipe by sequentially rotating two sleeves with tools such as pliers to clean, replace, or repair the pipe body's connection points, thus improving maintenance efficiency, during power plant boiler pipe maintenance, the pipe joints cannot be aligned horizontally during connection, and pre-connection is impossible, leading to difficulties in disassembly and assembly. Furthermore, since the pipes are enclosed entities, engineers need to disassemble and reassemble them for maintenance each time, adding to the workload of the maintenance work.

[0005] Therefore, this utility model provides a power plant boiler maintenance pipeline. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a power plant boiler maintenance pipeline, which solves the problems of difficult disassembly and connection of traditional power plant boiler pipelines, as well as the need for repeated disassembly, assembly, inspection, and maintenance.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a power plant boiler maintenance pipeline, comprising a pipeline A, one end of which is fitted with a flange A, a limiting ring is fixedly connected to the surface of the flange A, and one end of the pipeline A is connected to an inner pipe through the interior of the flange A. A connecting component for improving the quick disassembly efficiency of power plant boiler pipeline maintenance is fitted inside the limiting ring. An observation groove is provided at the bend of the other end of the pipeline A, and a visualization component for improving the efficiency of pipeline maintenance and inspection is provided inside the observation groove.

[0008] The connecting assembly includes a fixing ring sleeved inside the limiting ring. The top and bottom of the fixing ring are symmetrically provided with directional holes along the upper and lower axes. A spring is provided inside the directional hole, and one end of the spring is fixedly connected to a limiting ball.

[0009] The visualization component includes a neodymium iron boron magnetic frame disposed inside the observation slot, and the inside of the neodymium iron boron magnetic frame is provided with double-layer pressure-resistant glass, and the inside of the double-layer pressure-resistant glass is provided with an argon gas isolation layer, and the outer surface of the double-layer pressure-resistant glass is provided with a planar adsorption disk that magnetically engages with the bottom shell of the infrared thermal imager.

[0010] Preferably, the limiting ring has limiting holes on both sides that are adapted to the limiting ball, and the inner wall of the limiting ring has an auxiliary sliding groove located on the same ring line as the limiting hole.

[0011] Preferably, the NdFeB magnetic frame has a magnet grade of N35, and its four corners are provided with positioning bolts. It forms a sealed connection with the pipe wall by argon arc welding. The inner side of the NdFeB magnetic frame is coated with a high-temperature resistant ceramic coating. The surface of the planar adsorption plate is processed with positioning grooves, and RFID chips are embedded in the grooves.

[0012] Preferably, a B flange is rotatably connected to one side of the fixing ring, and a B pipe is provided on the surface of the B flange.

[0013] Preferably, one end of the inner tube is inserted into the interior of pipe B, and the surface of the inner tube is fitted with several elastic sealing rings for improving sealing performance.

[0014] Preferably, the surface of the B flange has several circular holes, and a threaded bolt is provided inside the circular holes. The surface of the A flange has several threaded holes that are on the same axis as the circular holes. The threaded bolts pass through the through holes and are threadedly connected to the inside of the threaded holes.

[0015] Beneficial effects

[0016] This utility model provides a maintenance pipeline for a power plant boiler. Compared with the prior art, it has the following advantages:

[0017] 1. The boiler maintenance pipeline of this power plant uses a mechanical locking structure in which a fixed ring and a limiting ring in the connecting assembly work together, and a spring drives the limiting ball to embed into the limiting hole. This achieves automatic positioning during pipeline pre-connection. Combined with the sleeve design of flange A and flange B, the axial deviation between pipeline A and pipeline B can be controlled within a small error range, solving the problem of difficult pipeline alignment in traditional systems. The disassembly and assembly time is greatly shortened. The composite connection method of elastic limiting ball and threaded bolt is adopted. During operation, only a 45° rotation of the fixed ring is needed to release or lock the limiting ball. Combined with the pre-compression design of the elastic sealing ring, a completely tool-free operation is achieved.

[0018] 2. The boiler maintenance pipeline of this power plant uses a neodymium iron boron magnetic frame and a flat adsorption plate of the visualization component to support the rapid adsorption of infrared thermal imagers. Combined with the optical transmittance optimization of double-layer pressure-resistant glass and argon gas isolation layer, the wear condition of the inner pipe can be detected in real time without disassembling the pipeline, thus reducing the frequency of pipeline disassembly in routine maintenance. Attached Figure Description

[0019] Figure 1 This is a three-dimensional appearance schematic diagram of the present utility model;

[0020] Figure 2 This is a three-dimensional appearance diagram of pipe A and pipe B of this utility model;

[0021] Figure 3 This is a three-dimensional appearance diagram of the connecting component of this utility model;

[0022] Figure 4 This is a three-dimensional appearance diagram of the visual component of this utility model.

[0023] In the diagram: 1. Pipe A; 2. Flange A; 3. Limiting ring; 31. Limiting hole; 32. Auxiliary slide; 4. Inner pipe; 5. Connecting assembly; 51. Fixing ring; 52. Orientation hole; 53. Spring; 54. Limiting ball; 6. Observation slot; 7. Visualization assembly; 71. Neodymium iron boron magnetic frame; 72. Double-layer pressure-resistant glass; 73. Argon gas isolation layer; 74. Flat adsorption plate; 75. RFID chip; 8. Flange B; 9. Pipe B; 10. Elastic sealing ring; 11. Threaded bolt. Detailed Implementation

[0024] 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.

[0025] This utility model provides two technical solutions:

[0026] Figures 1-4The first embodiment is shown: a power plant boiler maintenance pipeline, including a pipeline A1, one end of which is fitted with a flange A2, a limiting ring 3 is fixedly connected to the surface of the flange A2, and one end of the pipeline A1 passes through the interior of the flange A2 and is connected to an inner pipe 4. A connecting component 5 for improving the quick disassembly efficiency of power plant boiler pipeline maintenance is fitted inside the limiting ring 3. An observation groove 6 is provided at the bend of the other end of the pipeline A1, and a visualization component 7 for improving the pipeline maintenance and inspection efficiency is provided inside the observation groove 6. The connecting component 5 includes a fixing ring 51 fitted inside the limiting ring 3. The top and bottom of the fixing ring 51 are provided with directional holes 52 symmetrically arranged on the upper and lower axes. A spring 53 is provided inside the directional holes 52, and one end of the spring 53 is fixedly connected to a limiting ball 54. Limiting holes 31 that are adapted to the limiting balls 54 are provided on both sides of the limiting ring 3. An auxiliary sliding groove 32 is provided on the inner wall of the limiting ring 3 and on the same ring line as the limiting holes 31.

[0027] Specifically, the A flange 2 of pipe A 1 is brought close to the B flange 8 of pipe B 9, the inner pipe 4 is inserted into the inner cavity of pipe B 9, and the pre-sealing is achieved by the elastic sealing ring 10 on the outer wall of the inner pipe 4. The fixing ring is rotated 45° clockwise, and the limiting ball 54 is pushed by the spring 53 and slides into the limiting hole 31 along the auxiliary slide groove 32, generating mechanical self-locking.

[0028] In this embodiment, the visualization component 7 includes a neodymium iron boron magnetic frame 71 disposed inside the observation slot 6. The neodymium iron boron magnetic frame 71 is provided with a double-layer pressure-resistant glass 72 inside, and an argon gas isolation layer 73 is provided inside the double-layer pressure-resistant glass 72. The outer surface of the double-layer pressure-resistant glass 72 is provided with a flat adsorption plate 74 that magnetically engages with the bottom shell of the infrared thermal imager. The neodymium iron boron magnetic frame 71 has a magnet grade of N35 and positioning bolts at its four corners. It forms a sealed connection with the pipe wall through argon arc welding. The inner side of the neodymium iron boron magnetic frame 71 is coated with a high-temperature resistant ceramic coating. The surface of the flat adsorption plate 74 is machined with positioning grooves, and an RFID chip 75 is embedded in the grooves.

[0029] Specifically, the positioning protrusion on the bottom of the infrared thermal imager (model: FLIR T840) is aligned with the positioning groove of the flat adsorption plate 74, and the device is quickly adsorbed by magnetic force. The inside of the pipe is observed through the double-layer pressure-resistant glass 72 (outer layer: borosilicate glass JGS1, thickness 5mm; inner layer: tempered glass HST, thickness 3mm), and the surface temperature field of the inner tube 4 is captured in real time.

[0030] Figures 1-4 The second embodiment is shown, and its main difference from the first embodiment is:

[0031] Specifically, a B flange 8 is rotatably connected to one side of the fixed ring 51, and a B pipe 9 is provided on the surface of the B flange 8. One end of the inner pipe 4 is inserted into the interior of the B pipe 9, and several elastic sealing rings 10 for improving sealing are fitted on the surface of the inner pipe 4. Several circular holes are opened on the surface of the B flange 8, and threaded bolts 11 are provided inside the circular holes. Several threaded holes on the surface of the A flange 2 are opened on the same axis as the circular holes, and the threaded bolts 11 pass through the through holes and are threadedly connected to the inside of the threaded holes.

[0032] By applying torque to the circular holes of flange A 2 and flange B 8 through the threaded bolt 11, axial clearance is eliminated.

[0033] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0034] Working principle: The operator aligns pipe A 1 and pipe B 9 along the axis, inserts the inner pipe 4 to the limit mark line, rotates the fixing ring 51 until the limit ball 54 makes a "click" locking sound, completing the initial connection. After observing the pipe adsorbed by the infrared thermal imager through the visual detection window, the RFID chip 75 is automatically identified to retrieve pipe parameters such as design pressure and last maintenance date. Combined with the real-time thermal image, the local overheated area of ​​the pipe is analyzed to locate the fault point. Through the mechanical self-locking of the split docking mechanism and the magnetic positioning of the visual detection window, the efficiency of pipe disassembly and assembly is improved, the inspection time is reduced, and no special tools are required for the entire process.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A power plant boiler maintenance pipeline, comprising pipeline A (1), characterized in that: One end of the A pipe (1) is fitted with an A flange (2), and a limiting ring (3) is fixedly connected to the surface of the A flange (2). One end of the A pipe (1) passes through the interior of the A flange (2) and is connected with an inner pipe (4). A connecting component (5) for improving the efficiency of quick disassembly during the maintenance of power plant boiler pipes is fitted inside the limiting ring (3). An observation groove (6) is provided at the bend of the other end of the A pipe (1), and a visualization component (7) for improving the efficiency of pipe maintenance and inspection is provided inside the observation groove (6). The connecting component (5) includes a fixing ring (51) sleeved inside the limiting ring (3). The top and bottom of the fixing ring (51) are provided with directional holes (52) symmetrically arranged on the upper and lower axes. A spring (53) is provided inside the directional hole (52), and one end of the spring (53) is fixedly connected to a limiting ball (54). The visualization component (7) includes a neodymium iron boron magnetic frame (71) disposed inside the observation slot (6), and the neodymium iron boron magnetic frame (71) is provided with double-layer pressure-resistant glass (72), and the double-layer pressure-resistant glass (72) is provided with an argon gas isolation layer (73), and the outer surface of the double-layer pressure-resistant glass (72) is provided with a planar adsorption disk (74) that magnetically engages with the bottom shell of the infrared thermal imager.

2. The power plant boiler maintenance pipeline according to claim 1, characterized in that: The limiting ring (3) has limiting holes (31) on both sides that are adapted to the limiting ball (54), and the inner wall of the limiting ring (3) and the limiting hole (31) are provided with an auxiliary sliding groove (32) on the same ring line.

3. The power plant boiler maintenance pipeline according to claim 1, characterized in that: The neodymium iron boron magnetic frame (71) has a magnet grade of N35 and is equipped with positioning bolts at its four corners. It forms a sealed connection with the pipe wall through argon arc welding. The inner side of the neodymium iron boron magnetic frame (71) is coated with a high-temperature resistant ceramic coating. The surface of the flat adsorption plate (74) is processed with positioning grooves, and RFID chips (75) are embedded in the grooves.

4. A power plant boiler maintenance pipeline according to claim 1, characterized in that: The fixed ring (51) is rotatably connected to a B flange (8) on one side, and a B pipe (9) is provided on the surface of the B flange (8).

5. A power plant boiler maintenance pipeline according to claim 1, characterized in that: One end of the inner tube (4) is inserted into the inside of pipe B (9), and the surface of the inner tube (4) is fitted with several elastic sealing rings (10) for improving sealing.

6. A power plant boiler maintenance pipeline according to claim 4, characterized in that: The surface of the B flange (8) has several circular holes, and a threaded bolt (11) is provided inside the circular holes. The surface of the A flange (2) has several threaded holes on the same axis as the circular holes. The threaded bolt (11) is threaded through the through hole and connected to the threaded hole.

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