Rapid opening alignment auxiliary device for boiler steam pipeline

Abstract

The invention discloses a boiler steam pipeline rapid opening alignment auxiliary device, and relates to the technical field of pipeline welding, the boiler steam pipeline rapid opening alignment auxiliary device comprises a first welding ring plate assembly and a second welding ring plate assembly, and the left and right sides of the first welding ring plate assembly and the second welding ring plate assembly are in threaded connection with fastening assemblies; welding windows are formed in the front face and the back face of the first welding annular plate assembly correspondingly. Through cooperation of a first welding ring plate assembly, a fastening assembly, a welding window and a first lug plate, the first welding ring plate assembly adopts a clamping mode of completely wrapping a butt part for pipelines with the specification of DN150 and below, and the butt part is clamped by the first welding ring plate assembly under the condition that it is guaranteed that one end of the butt pipeline is fixed; by screwing the fastening bolt on one side of the first welding ring plate assembly, forced alignment of the pipelines at the movable end can be achieved, the alignment alignment tolerance is eliminated, meanwhile, windowing treatment of symmetrically forming welding windows is further carried out on the surfaces of the two sides of the first welding ring plate assembly, and the reserved welding windows can facilitate subsequent direct welding operation.

Description

Technical Field

[0001] This invention relates to the field of pipe welding technology, and in particular to an auxiliary device for rapid alignment of boiler steam pipes. Background Technology

[0002] In the installation of thermal power boiler systems, the connection quality and purging effect of steam pipelines are crucial to ensuring the long-term safe operation of steam turbines.

[0003] However, in traditional construction, adjusting pipe alignment using tools such as hoists and crowbars is often not ideal, easily leading to quality problems such as misalignment, straightness deviation, and uneven gaps. This is especially noticeable when dealing with numerous bends or varying pipe diameters, due to limitations in working space and installation difficulty. Furthermore, traditional steam blowing and target firing operations involve repeated installation and removal of the aluminum target plate on the target plate surface, making it a time-consuming and labor-intensive task with relatively slow work efficiency. Summary of the Invention

[0004] This application proposes a rapid alignment auxiliary device for boiler steam pipes, which has the following advantages: it facilitates the adjustment of pipe alignment concentricity, avoids pipe misalignment during welding, and is applicable to pipes of different diameters, thus solving the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this application adopts the following technical solution: a boiler steam pipe quick-connection auxiliary device, comprising a first welding ring plate assembly and a second welding ring plate assembly, wherein fastening components are threadedly connected to both the left and right sides of the first and second welding ring plate assemblies, welding windows are respectively opened on the front and back of the first welding ring plate assembly, a hinge assembly is fixedly installed on the left side of the rear end of the second welding ring plate assembly, a rotating plate is movably sleeved on the outer wall of the middle part of the hinge assembly, and the right side of the rotating plate is fixedly connected to the left side of the front end of the second welding ring plate assembly, and a limiting bracket assembly is fixedly installed on the front and back of the second welding ring plate assembly, wherein an adjusting bolt is threadedly sleeved on the inner wall of the end of the limiting bracket assembly away from the second welding ring plate assembly.

[0006] Optionally, clamping components are fixedly installed on the inner sides of both the first welding ring plate assembly and the second welding ring plate assembly, and anti-slip components are fixedly connected to the inner sides of the clamping components.

[0007] Optionally, the first welding ring plate assembly includes a first arc plate and a second arc plate. First ear plates are fixedly installed on the left and right sides of the first arc plate and the second arc plate respectively. First threaded holes are respectively opened through the upper and lower ends of the first ear plate, and the inner wall of the first threaded hole is threadedly connected to the outer wall of the fastening assembly. Welding windows are opened on both the first arc plate and the second arc plate.

[0008] Optionally, the second welding ring plate assembly includes a first clamp and a second clamp. Second ear plates are fixedly installed on the left and right sides of the first clamp and the second clamp, respectively. A second threaded hole is opened through the second ear plate, and the inner wall of the second threaded hole is threadedly connected to the outer wall of the fastening assembly. The left side of the second clamp is fixedly connected to the right end of the hinge assembly, and the left side of the first clamp is fixedly connected to the right end of the rotating plate. Limit bracket assemblies are installed on the left and right sides of the first clamp and the second clamp, respectively.

[0009] Optionally, the fastening assembly includes a fastening bolt and a fastening nut, wherein the outer wall of the fastening bolt is threadedly fitted with the inner wall of the fastening nut, and the outer wall of the fastening bolt is threadedly fitted with the inner wall of a first threaded hole or a second threaded hole.

[0010] Optionally, the hinge assembly includes an upper end plate, a round rod, and a lower end plate. The inner wall of the upper end plate is fixedly sleeved with the outer wall of the upper end of the round rod. The outer wall of the lower end plate of the round rod is fixedly sleeved with a lower end plate located below the upper end plate. The right ends of the upper end plate and the lower end plate are fixedly connected to the left side of the second clamp. The outer wall of the round rod is movably sleeved with the inner wall of the rotating plate.

[0011] Optionally, the limiting bracket assembly includes a side plate, an extension plate, and an annular plate. The back of the front side plate is fixedly connected to the front of the first clamp, and the front of the rear side plate is fixedly connected to the back of the second clamp. The upper end of the side plate is fixedly connected to the lower end of the extension plate, and the end of the extension plate away from the side plate is fixedly connected to the outer wall of the annular plate. The inner wall of the annular plate is threadedly connected to the outer wall of the adjusting bolt.

[0012] Optionally, the clamping assembly includes a telescopic spring and an arc-shaped clamping plate. One end of the telescopic spring is fixedly connected to the inner side of the first welding ring plate assembly or the second welding ring plate assembly, and the other end of the telescopic spring is fixedly connected to the outer side of the arc-shaped clamping plate. The inner side of the arc-shaped clamping plate is fixedly connected to the outer side of the anti-slip assembly.

[0013] Optionally, the anti-slip component includes an anti-slip pad and anti-slip contacts. The outer side of the anti-slip pad is fixedly connected to the inner side of the arc-shaped clamp. The inner side of the anti-slip pad is evenly distributed with anti-slip contacts to increase the friction between the anti-slip pad and the outer wall of the pipe.

[0014] Optionally, the outer wall of the adjusting bolt is provided with threads, and the outer wall of the adjusting bolt is threadedly connected to the inner wall of the annular plate, and the inner wall of the annular plate is provided with threads corresponding to the outer wall of the adjusting bolt.

[0015] In summary, the present invention has the following beneficial effects: 1. Through the cooperation between the first welding ring plate assembly, the fastening assembly, the welding window and the first ear plate, the first welding ring plate assembly adopts a clamping method that completely wraps around the joint of the pipe with a specification of DN150 and below. While ensuring that one end of the joint pipe is fixed, the moving end of the pipe can be forcibly aligned by tightening the fastening bolt on one side of the first welding ring plate assembly, eliminating the misalignment. At the same time, the welding windows are symmetrically opened on both sides of the first welding ring plate assembly, so that the reserved welding windows can facilitate subsequent welding operations.

[0016] 2. Through the cooperation between the second welding ring plate assembly, fastening assembly, limit bracket assembly, adjusting bolt and hinge assembly, for pipelines of DN200 and above, the alignment auxiliary device installs the second welding ring plate assembly on the fixed end pipeline through the hinge assembly. Limit bracket assemblies are welded to the four symmetrical corners on the side of the second welding ring plate assembly and extend to cover the movable end pipeline. The end of the limit bracket assembly has an adjusting bolt with its axis perpendicular to the pipeline surface, so that when the pipeline is aligned, the diagonal synchronous tightening method is used to change the screw depth of the adjusting bolt to achieve the squeezing adjustment of the pipeline position.

[0017] 3. Through the cooperation between the first welding ring plate assembly, the second welding ring plate assembly, the clamping assembly, and the anti-slip assembly, the clamping assembly reinforces the outer wall of the pipe. The anti-slip assembly is positioned between the first welding ring plate assembly, the second welding ring plate assembly, and the pipe, increasing the friction between the clamping assembly and the outer wall of the pipe. This strengthens the tightness of the first welding ring plate assembly and the second welding ring plate assembly after installation and prevents the pipe from slipping within the first welding ring plate assembly and the second welding ring plate assembly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top view of the first welding ring plate assembly in the structure of the present invention; Figure 3 This is a top view of the fastening component in the structure of the present invention; Figure 4 This is a top view of the first threaded hole in the structure of this invention; Figure 5 This is a side view of the clamping component in the structure of the present invention; Figure 6 This is a front view of the limiting bracket assembly in the structure of the present invention; Figure 7 This is a top view of the second welding ring plate assembly in the structure of the present invention; Figure 8 This is a front view of the hinge assembly in the structure of this invention; Figure 9 This is a top view of the rotating plate in the structure of this invention; Figure 10 This is a flowchart of the construction process of this invention.

[0019] Explanation of reference numerals in the attached figures: 1. First welding ring plate assembly; 101. First arc plate; 102. Second arc plate; 2. Second welding ring plate assembly; 201. First clamp; 202. Second clamp; 3. Fastening assembly; 301. Fastening bolt; 302. Fastening nut; 4. Welding window; 5. Hinge assembly; 501. Upper end plate; 502. Round rod; 503. Lower end plate; 6. Rotating plate; 7. Limiting bracket assembly; 701. Side plate; 702. Extension plate; 703. Ring plate; 8. Adjusting bolt; 10. First ear plate; 11. First threaded hole; 12. Clamping assembly; 121. Telescopic spring; 122. Arc-shaped clamping plate; 13. Anti-slip assembly; 131. Anti-slip pad; 132. Anti-slip contact point; 14. Second ear plate; 15. Second threaded hole. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to preferred embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 , Figure 2 and Figure 9As shown, a rapid alignment auxiliary device for boiler steam pipes includes a first welding ring plate assembly 1 and a second welding ring plate assembly 2. Compared with traditional construction methods, the application of this specialized alignment device in boiler system pipes of different diameters can effectively solve problems such as weld misalignment and straightness deviation, significantly improving the quality of pipe alignment. Both the left and right sides of the first and second welding ring plate assemblies 1 and 2 are threaded with fastening components 3. Welding windows 4 are respectively opened on the front and back of the first welding ring plate assembly 1, facilitating pipe welding by workers. A hinge assembly 5 is fixedly installed on the left side of the rear end of the second welding ring plate assembly 2, and a hinge component is movably sleeved on the outer wall of the middle part of the hinge assembly 5. Rotating plate 6, with its right side fixedly connected to the left side of the front end of the second welding ring plate assembly 2. Limiting bracket assemblies 7 are fixedly installed on the front and back of the second welding ring plate assembly 2 respectively. On-site, for small-diameter pipes, the first welding ring plate assembly 1 is used to adjust the misalignment and visualize the welding. For large-diameter pipes, the concentricity of the pipes is precisely controlled by the fine-tuning system of the adjusting bolts 8 of the four corner limiting bracket assemblies 7, which solves the problem of difficult assembly of high-suspension pipes in traditional construction. The adjustment is easier and the construction is more convenient. The inner wall of the limiting bracket assembly 7 away from the second welding ring plate assembly 2 is threaded with adjusting bolts 8. The diagonal synchronous tightening method is used to change the screwing depth of the adjusting bolts 8 to achieve the squeezing adjustment of the pipe position.

[0022] Clamping components 12 are fixedly installed on the inner sides of both the first welding ring plate assembly 1 and the second welding ring plate assembly 2. Anti-slip components 13 are fixedly connected to the inner side of the clamping components 12. In order to strengthen the fastness of the first welding ring plate assembly 1 or the second welding ring plate assembly 2 on the pipeline, after the first welding ring plate assembly 1 or the second welding ring plate assembly 2 is installed, the arc-shaped clamping plate 122 is adjusted to the position of the first welding ring plate assembly 1 or the second welding ring plate assembly 2 by the compression and rebound function of the extension spring 121 itself, so that the anti-slip component 13 is tightly attached to the outer wall of the pipeline. At this time, the friction between the arc-shaped clamping plate 122 and the outer wall of the pipeline is increased by the setting of the anti-slip pad 131 and the anti-slip contact 132, thereby improving the fastness of the first welding ring plate assembly 1 or the second welding ring plate assembly 2 after installation on the pipeline.

[0023] The first welding ring plate assembly 1 includes a first arc-shaped plate 101 and a second arc-shaped plate 102. First ear plates 10 are fixedly installed on the left and right sides of the first arc-shaped plate 101 and the second arc-shaped plate 102, respectively. First threaded holes 11 are respectively opened at the upper and lower ends of the first ear plates 10, and the inner walls of the first threaded holes 11 are threadedly connected to the outer wall of the fastening assembly 3. Welding windows 4 are opened on both the first arc-shaped plate 101 and the second arc-shaped plate 102. When the auxiliary device is suitable for pipelines of DN150 and below, the first welding ring plate assembly 1 is installed on the outer wall of the pipeline. The first welding ring plate assembly 1 is suitable for DN1... For pipes of size 50 and below, a clamping method is adopted to completely wrap the joint. While ensuring that one end of the joint pipe is fixed, the moving end pipe can be forcibly aligned by tightening the fastening bolt 301 on one side of the first welding ring plate assembly 1, eliminating the misalignment. Since the fastening bolt 301 is installed on both sides of the first welding ring plate assembly 1, the misalignment of the pipe can be finely adjusted by tightening the fastening bolt 301. At the same time, the two sides of the first welding ring plate assembly 1 are also symmetrically opened with welding windows 4, so that the reserved welding windows can facilitate subsequent welding operations.

[0024] like Figure 3 , Figure 7 and 8 As shown, the second welding ring plate assembly 2 includes a first clamp 201 and a second clamp 202. Second ear plates 14 are fixedly installed on the left and right sides of the first clamp 201 and the second clamp 202, respectively. A second threaded hole 15 is provided through the second ear plate 14, and the inner wall of the second threaded hole 15 is threadedly engaged with the outer wall of the fastening assembly 3. The left side of the second clamp 202 is fixedly connected to the right end of the hinge assembly 5, and the left side of the first clamp 201 is fixedly connected to the right end of the rotating plate 6. Limiting devices are installed on the left and right sides of the first clamp 201 and the second clamp 202, respectively. When the auxiliary device is applicable to pipes of DN200 and above, the matching auxiliary device installs the second welding ring plate assembly 2 on the fixed end pipe through the cooperation of the hinge assembly 5 and the rotating plate 6. The limit support assembly 7 is welded to the four symmetrical corners on the side of the second welding ring plate assembly 2 and extends to cover the movable end pipe. The end of the limit support assembly 7 has an adjusting bolt 8 with its axis perpendicular to the pipe surface, so that when the pipe is matched, the diagonal synchronous tightening method is used to change the screw depth of the adjusting bolt 8 to achieve the squeezing adjustment of the pipe position.

[0025] The fastening assembly 3 includes a fastening bolt 301 and a fastening nut 302. The outer wall of the fastening bolt 301 is threadedly connected to the inner wall of the fastening nut 302. The outer wall of the fastening bolt 301 is threadedly connected to the inner wall of the first threaded hole 11 or the second threaded hole 15. By changing the connection method between the fastening bolt 301 and the first threaded hole 11 or the second threaded hole 15, the installation or removal of the first welding ring plate assembly 1 and the second welding ring plate assembly 2 on the pipeline can be realized.

[0026] The hinge assembly 5 includes an upper end plate 501, a round rod 502, and a lower end plate 503. The inner wall of the upper end plate 501 is fixedly sleeved with the outer wall of the upper end of the round rod 502. The outer wall of the lower end plate of the round rod 502 is fixedly sleeved with the lower end plate 503 located below the upper end plate 501. The right ends of the upper end plate 501 and the lower end plate 503 are fixedly connected to the left side of the second clamp 202. The outer wall of the round rod 502 is movably sleeved with the inner wall of the rotating plate 6.

[0027] like Figure 4 , Figure 5 and 6 As shown, the limiting bracket assembly 7 includes a side plate 701, an extension plate 702, and an annular plate 703. The back of the front side plate 701 is fixedly connected to the front of the first clamp 201, and the front of the rear side plate 701 is fixedly connected to the back of the second clamp 202. The upper end of the side plate 701 is fixedly connected to the lower end of the extension plate 702. The end of the extension plate 702 away from the side plate 701 is fixedly connected to the outer wall of the annular plate 703. The inner wall of the annular plate 703 is threadedly connected to the outer wall of the adjusting bolt 8.

[0028] The clamping assembly 12 includes a telescopic spring 121 and an arc-shaped clamping plate 122. One end of the telescopic spring 121 is fixedly connected to the inner side of the first welding ring plate assembly 1 or the second welding ring plate assembly 2, and the other end of the telescopic spring 121 is fixedly connected to the outer side of the arc-shaped clamping plate 122. The inner side of the arc-shaped clamping plate 122 is fixedly connected to the outer side of the anti-slip assembly 13.

[0029] The anti-slip assembly 13 includes an anti-slip pad 131 and anti-slip contacts 132. The outer side of the anti-slip pad 131 is fixedly connected to the inner side of the arc-shaped clamp 122. The inner side of the anti-slip pad 131 is evenly distributed with anti-slip contacts 132 to increase the friction between the anti-slip pad 131 and the outer wall of the pipe. The arrangement of the anti-slip pad 131 and anti-slip contacts 132 increases the tightness of the first welding ring plate assembly 1 and the second welding ring plate assembly 2 after they are installed on the pipe.

[0030] The outer wall of the adjusting bolt 8 is threaded, and the outer wall of the adjusting bolt 8 is threadedly connected to the inner wall of the annular plate 703. The inner wall of the annular plate 703 is also threaded with a thread corresponding to the outer wall of the adjusting bolt 8.

[0031] like Figure 10As shown, before pipe welding: 1. Establish and implement a quality assurance system for boiler and pipeline installation in accordance with the specifications. Welding technical plans (welder qualifications, welding material materials, welding procedure qualification, welding operation instructions and handover cards, welding material baking, welding material requisition and recycling, welding records, welding project summary, etc.) must be strictly explained, pre-welding examinations, process control, and post-weld inspections.

[0032] 2. Welding materials such as welding rods, welding wires, tungsten rods, argon, carbon dioxide, oxygen, and acetylene, as well as aluminum target plates, must meet national or industry standards and have quality certificates.

[0033] 3. All types of welding machines used for pipe welding are equipped with ammeters and voltmeters, and are calibrated regularly as required; heaters used for weld heat treatment are equipped with electric heating automatic temperature control boxes and automatic temperature recorders.

[0034] 4. Based on the specifications of the pipeline, make appropriate simple pipeline alignment tools on site using steel plates, steel pipes, etc. When the auxiliary device is applicable to DN150 and below pipes, (1) is installed on the outer wall of the pipe. The first welding ring plate assembly 1 adopts a clamping method that completely wraps the joint part of the DN150 and below pipes. While ensuring that one end of the joint pipe is fixed, the forced alignment of the movable end pipe can be achieved by tightening the fastening bolt 301 on one side of the first welding ring plate assembly 1, eliminating the misalignment of the joint. Since the fastening bolt 301 is installed on both sides of the first welding ring plate assembly 1, the misalignment of the pipe can be finely adjusted by tightening the fastening bolt 301. At the same time, the welding windows 4 are symmetrically opened on both sides of the first welding ring plate assembly 1, so that the reserved welding windows can be convenient for subsequent welding operations. When the auxiliary device is applicable to pipes of DN200 and above, the alignment auxiliary device installs the second welding ring plate assembly 2 on the fixed end pipe through the cooperation of the hinge assembly 5 and the rotating plate 6. The limit bracket assembly 7 is welded on the four symmetrical corners of the side of the second welding ring plate assembly 2 and extends to cover the movable end pipe. The end of the limit bracket assembly 7 has an adjusting bolt 8 with its axis perpendicular to the pipe surface, so that when the pipe is aligned, the pipe position can be adjusted by changing the screw depth of the adjusting bolt 8 using the diagonal synchronous tightening method. To reinforce the fastening of the first welded ring plate assembly 1 or the second welded ring plate assembly 2 on the pipeline, after installation, the compression and rebound function of the extension spring 121 is used to adjust the position of the arc-shaped clamp 122 on the first welded ring plate assembly 1 or the second welded ring plate assembly 2, so that the anti-slip component 13 is in close contact with the outer wall of the pipeline. At this time, the setting of the anti-slip pad 131 and the anti-slip contact 132 increases the friction between the arc-shaped clamp 122 and the outer wall of the pipeline, thereby improving the fastening of the first welded ring plate assembly 1 or the second welded ring plate assembly 2 after installation on the pipeline.

[0035] 1. The procurement of flanges, blind flanges, and bolts for the target plate assembly shall be strictly in accordance with the blowdown guidelines and design requirements to ensure that the materials, dimensions, and pressure and temperature resistance meet the working conditions. The support rod of the target plate assembly shall be divided into two sections. The upper section shall be welded to the flange cover as a whole and extend into the pipe by about 50mm. A Φ12 bolt hole shall be machined at the end. The lower section shall be made of 10mm thick flat steel or steel plate. The length shall be customized according to the distance from the bottom of the pipe and the width shall be ≥30mm. A Φ12 bolt hole shall be drilled at the top to correspond with the bolt hole of the upper section. A limiting collar shall be welded at the bottom 50mm from the end to ensure that the support rod is stably positioned.

[0036] 5.1 Pipeline hoisting 1. Use BIM technology to create a 3D model, simulate the pipeline route and spatial layout, and identify potential interference points such as steel frames and equipment. Then, design the hoisting path in advance based on the weight of each pipeline section, optimize the hoisting points, and ensure a safe distance of ≥500mm from the boiler body and steel frame structure; 2. Based on the pipe diameter and weight, select a suitable crane and hydraulic lifting device, and configure a real-time monitoring system including a load cell, inclinometer, and wind speed alarm. Use anti-slip locking lifting gear, and select wire ropes with nylon sheaths. During the actual lifting of the pipeline, employ the "three-point lifting method," and simultaneously install an electro-hydraulic leveling mechanism to correct pipe tilt in real time.

[0037] 5.2 Pipe section assembly and adjustment After the pipe assembly devices are installed, pipes with a diameter less than DN150 can quickly achieve concentricity control of the pipe joint by adjusting the fastening bolts of the sleeve. After adjustment, the pipes are fixed by electric welding based on the operating hole. For pipes with a diameter greater than or equal to DN200, the joint can be precisely adjusted by the synergistic action of the limit bracket and the adjusting bolt.

[0038] 5.3 Removal of Auxiliary Devices After the pipe sections are properly aligned and firmly spot-welded, remove the alignment auxiliary tools and preheat according to the welding heat treatment process and plan requirements. The preheating range should be based on the center of the weld and not less than 3 times the thickness of the weldment on each side.

[0039] 5.4 Butt welding According to the technical requirements of the drawings, welding technical specifications, welding procedure qualification report, welding work instructions, and process cards, the assembled pipelines are welded strictly according to the welding plan. Process control includes ensuring welders are certified and qualified, welding materials are properly baked, preheating temperature meets requirements, welding methods are selected in compliance with regulations, and welding environment measures are implemented. Unless otherwise specified in the welding process, each weld should be completed continuously in one go, while ensuring pipe end sealing to prevent drafts inside the pipe.

[0040] 5.5 Weld Treatment After each weld is completed, the weld appearance is inspected (weld width, height, undercut, surface slag inclusions, surface porosity, surface cracks, etc.) until it passes the inspection, and then the next heat treatment process is carried out.

[0041] 1. Heat treatment Before implementation, a special heat treatment plan and heat treatment process card should be prepared, reviewed and approved, and strictly implemented according to the heat treatment temperature curve. 2. Spectrum, Hardness After heat treatment, the hardness and spectrum of the base metal of the weld and its heat-affected zone should be checked, and their technical indicators should meet the design and specification requirements. 3. Non-destructive testing After heat treatment, spectral analysis, and hardness testing are completed and the weld is inspected for non-destructive testing until it passes. If the test fails, the weld is repaired and heat-treated according to the aforementioned procedures until it meets the design and specification requirements. Each weld is only allowed to be repaired once; otherwise, the pipe or fittings must be replaced.

[0042] 5.6 Hydrostatic Test After the boiler piping is installed and inspected, a strength and tightness system test is conducted. The test scope includes: water-cooled walls, wall-mounted superheaters, roof superheaters, front screen superheaters, rear screen superheaters, high-temperature superheaters, high-temperature reheaters, low-temperature superheaters, low-temperature reheaters, main economizers, bypass economizers, centralized downcomers, connecting pipes, and sewage drainage systems, etc. The reheater system is tested separately.

[0043] 5.7 Installation of the Pre-blowing System 1. Design of temporary blowing pipeline According to the specifications, the design unit must provide construction drawings, and the construction must be organized on site according to the technical requirements of the drawings. There are generally two design schemes for the temporary blowing pipeline system: either the reheat system and the superheat system are each blown separately, or the reheat system and the superheat system are combined into one blown section. The on-site determination is based on the length of the boiler system pipeline. 2. Technical requirements for target plate installation location According to the specifications, the target plate device should be installed close to the main pipeline. The length of the straight pipe section before the target plate device should be 4 to 5 times the diameter of the pipeline, and the length of the straight pipe section after the target plate device should be 2 to 3 times the diameter of the pipeline. 3. Basic technical requirements for silencers Generally, blowpipe designs have high pressure and temperature, and the noise and vibration during blowpipe operation are very large. The thermal expansion of the pipeline system and equipment must also be considered, and the foundation of the silencer must be strictly implemented according to the foundation requirements of the design drawings.

[0044] 5.8 Steam blowing pipe In the initial blowing stage, the lower target plate and target plate are not installed before blowing.

[0045] 5.9 Blowpipe Target Loading After the boiler steam blowing reaches a certain number of times, the next section of the target plate device and target plate are installed, replaced, and the target is fired.

[0046] 1. Remove the flange cover of the upper target plate, then insert the aluminum target plate into the collar of the support rod of the lower target plate, and then connect it to the upper target plate with bolts, keeping the lower target plate and the target plate perpendicular to the flange cover. 2. Install the target plate and target plate into the steam blowing pipe, tighten the flange cover bolts, and make sure the target plate is facing the wind. The target installation is now complete, and steam blowing can be carried out to hit the target. 3. When replacing the target plate, repeat the above steps of disassembly, assembly, and target replacement until the boiler steam purging operation is completed.

[0047] 5.10 Target Practice Inspection According to the requirement of "blowing coefficient = (steam flow rate during blow-up) 2 × (steam specific volume during blow-up) / (steam flow rate at rated load) 2 × (steam specific volume at rated load)", under the premise of ensuring the blow-up coefficient, the target plate is replaced twice in succession for inspection. If the particle size of the impact marks on the target plate is not greater than 0.8mm and there are no more than 8 visible marks, then the boiler steam blow-up is considered qualified.

[0048] Although embodiments of the 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 invention. The invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rapid alignment auxiliary device for boiler steam pipes, characterized in that: The assembly includes a first welding ring plate assembly (1) and a second welding ring plate assembly (2). Both the left and right sides of the first welding ring plate assembly (1) and the second welding ring plate assembly (2) are threaded with fastening components (3). The front and back sides of the first welding ring plate assembly (1) are respectively provided with welding windows (4). The left side of the rear end of the second welding ring plate assembly (2) is fixedly installed with a hinge assembly (5). The outer wall of the middle part of the hinge assembly (5) is movably sleeved with a rotating plate (6), and the right side of the rotating plate (6) is fixedly connected to the left side of the front end of the second welding ring plate assembly (2). The front and back sides of the second welding ring plate assembly (2) are respectively fixedly installed with a limiting bracket assembly (7). The inner wall of the limiting bracket assembly (7) away from the second welding ring plate assembly (2) is threaded with an adjusting bolt (8).

2. The boiler steam pipe rapid alignment auxiliary device according to claim 1, characterized in that: The first welding ring plate assembly (1) and the second welding ring plate assembly (2) are both fixedly installed with clamping assemblies (12), and the clamping assemblies (12) are fixedly connected with anti-slip assemblies (13).

3. The auxiliary device for rapid alignment of boiler steam pipes according to claim 1, characterized in that: The first welding ring plate assembly (1) includes a first arc plate (101) and a second arc plate (102). First ear plates (10) are fixedly installed on the left and right sides of the first arc plate (101) and the second arc plate (102). First threaded holes (11) are opened through the upper and lower ends of the first ear plates (10), and the inner wall of the first threaded hole (11) is threadedly connected to the outer wall of the fastening assembly (3). Welding windows (4) are opened on both the first arc plate (101) and the second arc plate (102).

4. The auxiliary device for rapid alignment of boiler steam pipes according to claim 1, characterized in that: The second welding ring plate assembly (2) includes a first clamp (201) and a second clamp (202). The first clamp (201) and the second clamp (202) are respectively fixedly installed on the left and right sides. The second ear plate (14) is provided with a second threaded hole (15) through it. The inner wall of the second threaded hole (15) is threadedly connected to the outer wall of the fastening assembly (3). The left side of the second clamp (202) is fixedly connected to the right end of the hinge assembly (5). The left side of the first clamp (201) is fixedly connected to the right end of the rotating plate (6). Limit bracket assemblies (7) are respectively installed on the left and right sides of the first clamp (201) and the second clamp (202).

5. A boiler steam pipe rapid alignment auxiliary device according to claim 3 or 4, characterized in that: The fastening assembly (3) includes a fastening bolt (301) and a fastening nut (302). The outer wall of the fastening bolt (301) is threadedly connected to the inner wall of the fastening nut (302), and the outer wall of the fastening bolt (301) is threadedly connected to the inner wall of the first threaded hole (11) or the second threaded hole (15).

6. The auxiliary device for rapid alignment of boiler steam pipes according to claim 4, characterized in that: The hinge assembly (5) includes an upper end plate (501), a round rod (502) and a lower end plate (503). The inner wall of the upper end plate (501) is fixedly sleeved with the outer wall of the upper end of the round rod (502). The outer wall of the lower end plate of the round rod (502) is fixedly sleeved with the lower end plate (503) located below the upper end plate (501). The right ends of the upper end plate (501) and the lower end plate (503) are fixedly connected to the left side of the second clamp (202). The outer wall of the round rod (502) is movably sleeved with the inner wall of the rotating plate (6).

7. The auxiliary device for rapid alignment of boiler steam pipes according to claim 4, characterized in that: The limiting bracket assembly (7) includes a side plate (701), an extension plate (702), and an annular plate (703). The back of the front side plate (701) is fixedly connected to the front of the first clamp (201), and the front of the rear side plate (701) is fixedly connected to the back of the second clamp (202). The upper end of the side plate (701) is fixedly connected to the lower end of the extension plate (702). The end of the extension plate (702) away from the side plate (701) is fixedly connected to the outer wall of the annular plate (703). The inner wall of the annular plate (703) is threadedly connected to the outer wall of the adjusting bolt (8).

8. The auxiliary device for rapid alignment of boiler steam pipes according to claim 2, characterized in that: The clamping assembly (12) includes a telescopic spring (121) and an arc-shaped clamping plate (122). One end of the telescopic spring (121) is fixedly connected to the inner side of the first welding ring plate assembly (1) or the second welding ring plate assembly (2), and the other end of the telescopic spring (121) is fixedly connected to the outer side of the arc-shaped clamping plate (122). The inner side of the arc-shaped clamping plate (122) is fixedly connected to the outer side of the anti-slip assembly (13).

9. The auxiliary device for rapid alignment of boiler steam pipes according to claim 8, characterized in that: The anti-slip component (13) includes an anti-slip pad (131) and anti-slip contacts (132). The outer side of the anti-slip pad (131) is fixedly connected to the inner side of the arc-shaped clamp (122). The inner side of the anti-slip pad (131) is evenly distributed with anti-slip contacts (132) for increasing the friction between the anti-slip pad (131) and the outer wall of the pipe.

10. The boiler steam pipe rapid alignment auxiliary device according to claim 7, characterized in that: The outer wall of the adjusting bolt (8) is provided with threads, and the outer wall of the adjusting bolt (8) is threadedly connected to the inner wall of the annular plate (703), and the inner wall of the annular plate (703) is provided with threads corresponding to the outer wall of the adjusting bolt (8).

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