A high-conductor replacement positioning tool

Abstract

The present invention relates to a high-tube replacement positioning tool, including a positioning crossbeam, on which three groups of installation and fixing mechanisms are arranged along the axial direction, and the three groups of installation and fixing mechanisms are respectively used to connect the first cannula, the second cannula and the fourth cannula correspondingly; each group of installation and fixing mechanisms includes a positioning sleeve, a sealing ring, a positioning bolt and a locking nut, and the upper ends of the first cannula, the second cannula and the fourth cannula are provided with a connecting groove, the lower end of the positioning sleeve is inserted into the connecting groove and is threadedly connected to the connecting groove, the sealing ring is sleeved on the upper end of the positioning sleeve, and the positioning crossbeam is lifted by the sealing rings of the three groups of installation and fixing mechanisms. When using the positioning tool combination, there is no need to buckle the inner and outer cylinders, and personnel can install and construct in the cylinder, and the cannula replacement work can be completed in one day, the difficulty of work is reduced, and the safety and work efficiency are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of high-tube replacement, and in particular to a high-tube replacement positioning tool. Background Art

[0002] Recently, defects of 300MW steam turbine units have frequently occurred due to the breakage and detachment of high ducts. The intubation failure has caused abnormal noise in the unit, and the high ducts, steam valves and oil pipelines have vibrated violently. In severe cases, the drain and oil pipelines have broken, resulting in shutdown.

[0003] The high duct insert of 300MW steam turbine is bell-shaped sealed. Insert 1, insert 2 and insert 4 are located at the lower part of the cylinder, and insert 5, insert 3 and insert 6 are located at the upper part of the cylinder. The installation requires that the three inserts are in the same straight line and have the same horizontal height to ensure that they are concentric with the inner cylinder socket.

[0004] The conventional method is to use a positioning ring to position the insert and the bell seal ring, and then buckle the inner and outer cylinders to align and weld the insert. This process is more suitable for replacing the upper insert, while the lower insert is much more difficult to replace. The lower temperature measuring points, drain pipes, and steam extraction pipes are complex, and the construction space is limited. Therefore, it is necessary to make insert construction support platforms and hangers. The construction is difficult and has a high safety risk. The construction period is about 3-5 days, the workload is large, and the construction time is long, which affects the maintenance period of the unit.

[0005] Based on the above technical problems, the inventor improved the original construction plan through design and research and development, and proposed a high-catheter catheter replacement positioning tool. The use of this replacement positioning tool can meet the technical requirements of high-catheter catheter replacement. There is no need to buckle the inner and outer cylinders. Personnel can install and construct inside the cylinder. The catheter replacement work can be completed in one day, the work difficulty is reduced, and the safety and work efficiency are greatly improved. Summary of the invention

[0006] The present invention aims at the deficiencies of the prior art and provides a high-conductor replacement and positioning tool.

[0007] The present invention is achieved through the following technical scheme, which provides a high-tube replacement positioning tool, including a positioning beam, on which three groups of mounting and fixing mechanisms are arranged along the axial direction, and the three groups of mounting and fixing mechanisms are respectively used to correspondingly connect the first plug tube, the second plug tube and the fourth plug tube; each group of mounting and fixing mechanisms includes a positioning sleeve, a sealing ring, a positioning bolt and a locking nut, and a connecting groove is provided at the upper end of the first plug tube, the second plug tube and the fourth plug tube, the lower end of the positioning sleeve is inserted into the connecting groove and threadedly connected to the connecting groove, the sealing ring is sleeved on the upper end of the positioning sleeve, and the positioning beam is supported by the sealing rings of the three groups of mounting and fixing mechanisms.

[0008] Preferably, each positioning sleeve is connected to the positioning beam via a positioning bolt, and a locking nut is mounted on the positioning bolt and is used to compress the positioning beam.

[0009] Preferably, the positioning beam is required to have sufficient strength, made of 45# steel, with specifications of 80×70×1500㎜, and the positioning bolt specifications are

[0010] Preferably, a positioning block is placed between the outer cylinder and the insert tube. The positioning block is used to reinforce the insert tube and prevent the insert tube from deforming and shifting during welding after being aligned and positioned.

[0011] How to use: Take the replacement of the first plug-in pipe as an example. Use the second and fourth plug-in pipes as a reference, install the positioning sleeves on the connecting grooves, install the sealing rings on the positioning sleeves respectively, place the positioning beam on the sealing rings, use positioning bolts to firmly connect the positioning beam and the positioning sleeve threads, align with the plug-in pipes and fix them with locking nuts. Then, fix the newly replaced first plug-in pipe on the positioning beam in the same way. This can ensure that the three first plug-in pipes, the second plug-in pipe and the fourth plug-in pipe are in the same straight line and have the same horizontal height, meeting the technical requirements for plug-in alignment. Install the positioning bevel iron, set up a dial indicator for monitoring, and weld according to the metal welding process requirements.

[0012] The beneficial effects of the present invention are:

[0013] 1. When using this positioning tooling combination, there is no need to buckle the inner and outer cylinders. Personnel can install and construct inside the cylinder. The cannula replacement work can be completed in one day, which reduces the difficulty of work and greatly improves safety and work efficiency.

[0014] 2. Use this positioning tool combination for precise positioning to meet the technical requirements of the intubation installation. There is no need to buckle the inner and outer cylinders. The positioning and installation work can be completed on the cylinder. It not only saves the cost of buckling the cylinder and setting up the platform, but also ensures the quality, greatly shortens the construction period, reduces the difficulty of construction, and ensures safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 yes Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0017] Figure 3 This is a physical picture of the on-site installation of the positioning beam of the present invention;

[0018] As shown in the figure:

[0019] 1. Outer cylinder, 2. Fourth insert pipe, 3. Second insert pipe, 4. First insert pipe, 5. Positioning block, 6. Positioning beam, 7. Sealing ring, 8. Positioning sleeve, 10. Connecting groove, 11. Positioning bolt, 12. Locking nut. DETAILED DESCRIPTION

[0020] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0021] like Figure 1-3 As shown, the present invention includes a positioning beam 6, and three groups of mounting and fixing mechanisms are arranged on the positioning beam 6 along its axial direction. The three groups of mounting and fixing mechanisms are respectively used to connect the first plug 4, the second plug 3 and the fourth plug 2. Each group of mounting and fixing mechanisms includes a positioning sleeve 8, a sealing ring 7, a positioning bolt 11 and a locking nut 12. The upper ends of the first plug 4, the second plug 3 and the fourth plug 2 are provided with a connecting groove 10. The lower end of the positioning sleeve 8 is inserted into the connecting groove 10 and is threadedly connected with the connecting groove 10. The sealing ring 7 is sleeved on the upper end of the positioning sleeve 8. The positioning beam 6 is supported by the sealing rings 7 of the three groups of mounting and fixing mechanisms. Each positioning sleeve 8 is connected to the positioning beam 6 through a positioning bolt 11, and the locking nut 12 is installed on the positioning bolt 11 and is used to press the positioning beam 6.

[0022] In this embodiment, the positioning beam 6 is required to have sufficient strength, and the material is 45 steel, with a specification of 80×70×1500㎜, and the positioning bolt 11 has a specification of

[0023] In this embodiment, a positioning block 5 is placed between the outer cylinder 1 and the insert tube. The positioning block 5 is used to reinforce the insert tube and prevent the insert tube from deforming and shifting during welding after alignment and positioning.

[0024] When used specifically, the method of use is to take the replacement of the first plug pipe 4 as an example, use the second plug pipe 3 and the fourth plug pipe 2 as a reference, install the positioning sleeve 8 on the connecting groove 10, install the sealing ring 7 on the positioning sleeve 8 respectively, place the positioning beam 6 on the sealing ring 7, use the positioning bolt 11 to thread the positioning beam 6 and the positioning sleeve 8 firmly, and fix it with the locking nut 12 after aligning with the plug pipe, and then fix the newly replaced first plug pipe 4 on the positioning beam 6 in the same way. In this way, it can be ensured that the three first plug pipes 4, the second plug pipe 3 and the fourth plug pipe 2 are on the same straight line and the horizontal height is consistent, meeting the technical requirements for plug pipe alignment, install the positioning block 5, set up a dial indicator for monitoring, and weld according to the metal welding process requirements.

[0025] The use of this positioning tool combination does not require buckling of the inner and outer cylinders. The personnel can install and construct in the cylinder. The cannula replacement work can be completed in one day, which reduces the difficulty of work and greatly improves safety and work efficiency. The positioning tool combination can be used for precise positioning to meet the technical requirements of cannula installation. It does not require buckling of the inner and outer cylinders. The positioning and installation work can be completed on the cylinder. It not only saves the cost of buckling the cylinder and setting up the platform, but also ensures quality, greatly shortens the construction period, reduces the difficulty of construction, and ensures safety.

[0026] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by using existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention, and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A high-conductor replacement and positioning tool, characterized in that: It includes a positioning beam, on which three groups of mounting and fixing mechanisms are arranged along the axial direction, and the three groups of mounting and fixing mechanisms are respectively used to connect the first plug tube, the second plug tube and the fourth plug tube; each group of mounting and fixing mechanisms includes a positioning sleeve, a sealing ring, a positioning bolt and a locking nut, and the upper ends of the first plug tube, the second plug tube and the fourth plug tube are provided with connecting grooves, the lower end of the positioning sleeve is inserted into the connecting groove and threadedly connected with the connecting groove, the sealing ring is sleeved on the upper end of the positioning sleeve, and the positioning beam is supported by the sealing rings of the three groups of mounting and fixing mechanisms.

2. The high-tube replacement and positioning tool according to claim 1, characterized in that: Each positioning sleeve is connected to the positioning beam through a positioning bolt, and a locking nut is installed on the positioning bolt and is used to compress the positioning beam.

3. The high-conductor replacement and positioning tool according to claim 1, characterized in that: The positioning beam is made of 45# steel, with specifications of 80×70×1500㎜ and positioning bolt specifications 4. The high-conductor replacement and positioning tool according to claim 1, characterized in that: A positioning block is placed between the outer cylinder and the cannula for positioning.

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