Auxiliary tooling for connecting a nuclear power high-voltage outer cylinder

Abstract

The utility model discloses an auxiliary tooling for connecting a pipe of a nuclear power high-voltage outer cylinder, comprising an adapter block, the outer facade of the adapter block having an outwardly convexly formed raised protrusion; the outer facade at the upper side of the raised protrusion has an upper side positioning surface, and the outer facade at the lower side of the raised protrusion has a lower side positioning surface, and the upper side positioning surface and the lower side positioning surface are matched with the concentricity requirement of the connecting pipe operation; in the connecting pipe operation, the adapter block is arranged at the inner side of the outer cylinder pipe mouth of the high-voltage outer cylinder, and the lower side positioning surface is fitted and fixed with the inner wall surface of the outer cylinder pipe mouth, and the raised protrusion of the adapter block is located at the edge of the outer cylinder pipe mouth with a radial extension structure; the high-voltage connecting pipe is sleeved on the periphery of the adapter block, the upper side positioning surface of the adapter block is fitted and fixed with the inner wall surface of the high-voltage connecting pipe, and the bottom edge of the high-voltage connecting pipe is located on the raised protrusion of the adapter block. The utility model can effectively improve assembly quality, safety and operation efficiency.

Description

Technical Field

[0001] The utility model relates to an auxiliary tool for assembling a steam turbine, in particular to an auxiliary tool for taking over a nuclear power high-voltage outer cylinder. Background Art

[0002] A steam turbine is composed of multiple working cylinders, rotor components and steam pipes, so its assembly process involves the docking of the working cylinders with steam pipes (such as steam inlet pipes, steam extraction pipes, etc.).

[0003] The main body of the high-pressure cylinder used in nuclear power is a casting, and the outer cylinder mouth of the high-pressure outer cylinder is assembled with the high-pressure pipe (extraction pipe or steam inlet pipe) by a full penetration welding structure. According to technical requirements, the pipe mouth diameter of the high-pressure pipe is about Φ200~1400mm, the wall thickness is about 10~60mm, and the weight is about 200~2000KG. During the pipe welding process, a torque of 1000KG is required, and the concentricity of the high-pressure pipe and the outer cylinder mouth is controlled within 0.5mm.

[0004] Due to the large size and weight of the high-pressure pipe, it is difficult to assemble it in place at one time during the assembly process. It requires constant fine-tuning and inspection. Under the premise of meeting the above technical requirements, the operating efficiency is very low. Moreover, during the repeated fine-tuning of the high-pressure pipe, due to its large weight, the displacement inertia is large, and the thickness of the butt joint is only 2mm. Once it deviates, the high-pressure pipe is easy to fall and cause a safety accident. In addition, during the welding process, the welding groove between the high-pressure pipe and the outer cylinder pipe mouth lacks effective support and positioning. As the circumferential weld shrinks, the root gap of the welding groove will gradually become smaller, which increases the difficulty of penetration technology and is prone to welding quality defects such as unfused welds.

[0005] In summary, based on the particularity of the assembly between the nuclear power high-voltage outer cylinder and the high-voltage pipe, it is necessary to design an auxiliary tooling that is conducive to the assembly operation. The applicant has searched the disclosed prior art and has not found any related technology disclosed. Utility Model Content

[0006] The technical purpose of the utility model is to provide an auxiliary tooling for the nuclear power high-voltage outer cylinder take-over which can effectively improve the working efficiency, assembly safety and assembly quality in view of the particularity of the assembly between the above-mentioned nuclear power high-voltage outer cylinder and the high-voltage take-over and the deficiencies of the prior art.

[0007] The technical purpose of the utility model is achieved through the following technical solutions: an auxiliary tooling for a nuclear power high-voltage outer cylinder pipe connection, the auxiliary tooling having a transfer block, the outer facade of the transfer block having an outwardly convex raised protrusion; the outer facade at the upper side of the raised protrusion has an upper positioning surface, the outer facade at the lower side of the raised protrusion has a lower positioning surface, the upper positioning surface and the lower positioning surface are matched with the concentricity requirement of the pipe connection operation; in the pipe connection operation, the transfer block is arranged at the inner side of the outer cylinder pipe mouth of the high-pressure outer cylinder, and is fitted and fixed with the inner wall surface of the outer cylinder pipe mouth with the lower positioning surface, and the raised protrusion of the transfer block is located at the edge of the outer cylinder pipe mouth with a radial extension structure; the high-pressure pipe connection is sleeved on the periphery of the transfer block, the transfer block is fitted and fixed with the inner wall surface of the high-pressure pipe connection with the upper positioning surface, and the bottom edge of the high-pressure pipe connection is located on the raised protrusion of the transfer block.

[0008] The above-mentioned technical measures are arranged at the inner side of the outer cylinder pipe mouth of the high-pressure outer cylinder through the adapter block, and the lower positioning surface is fitted and fixed to the inner wall surface of the outer cylinder pipe mouth, which effectively ensures the concentricity of the outer cylinder pipe mouth and the high-pressure connecting pipe interface, reduces the complicated work process of repeated fine-tuning and inspection, improves the working efficiency, and reduces the safety risks in assembly; and the raising protrusion of the adapter block is located at the edge of the outer cylinder pipe mouth with a radial extension structure. The raising protrusion can fix the groove gap value, so that the groove gap will not become smaller as the weld seam shrinks, thereby ensuring the assembly quality.

[0009] On the outer facade at the lower side of the raised protrusion, there is a lower guide slope formed with a slope structure at the bottom of the lower positioning surface;

[0010] During the pipe connection operation, the adapter block is inserted and arranged on the inner side of the outer cylinder pipe opening through the lower guide slope.

[0011] The above technical measures can quickly guide the device into the interior of the high-pressure outer cylinder pipe mouth by contacting the lower guiding inclined surface with the high-pressure outer cylinder pipe mouth, reduce the collision between the device and the high-pressure outer cylinder, and improve the operation efficiency.

[0012] On the outer facade at the upper side of the raised protrusion, there is an upper guide slope formed with a slope structure and located at the top of the upper positioning surface;

[0013] During the pipe connection operation, the high-pressure pipe is sleeved onto the periphery of the adapter block through the upper guide slope.

[0014] The above technical measures can quickly guide the high-pressure pipe to align with the docking port of the high-pressure outer cylinder by contacting the pipe mouth of the high-pressure pipe with the upper guiding slope, thereby reducing the collision between the device and the high-pressure pipe and improving the working efficiency.

[0015] In the pipe connection operation, the transfer blocks are multiple blocks arranged at annular intervals;

[0016] The two adjacent transfer blocks in the annular direction are independent structures.

[0017] The above technical measures ensure that the concentricity of the assembly meets the technical requirements of the assembly through the coordination of multiple adapter blocks, while facilitating subsequent disassembly.

[0018] During the pipe connection operation, the adapter block is fixedly connected to the outer cylinder pipe opening by spot welding.

[0019] During the pipe connection operation, the adapter block is fixedly connected to the high-voltage pipe by spot welding.

[0020] The above technical measures fix the connecting pipe and the outer cylinder to the adapter block by spot welding, thereby avoiding damage to the equipment structure and reducing the risk of the connecting pipe shifting and falling, with a high degree of safety.

[0021] The thickness between the upper and lower sides of the raised protrusion on the outer vertical surface of the adapter block corresponds to the design gap of the welding groove in the pipe connection operation.

[0022] The top side and the bottom side of the raised protrusion are respectively planar structures.

[0023] The above technical measures increase the stress area during welding, increase the ability of the connecting pipe to resist shrinkage and deformation, ensure that the gap value at the root of the connecting pipe rupture will not decrease due to welding shrinkage during welding, and have high assembly accuracy.

[0024] The upper positioning surface and the lower positioning surface of the adapter block are matched with each other in a coplanar structure. This technical measure is conducive to improving the accuracy of the interface assembly.

[0025] The beneficial technical effect of the utility model is as follows: the utility model arranges a plurality of adapter blocks at the inner side of the outer cylinder pipe mouth of the high-pressure outer cylinder, and the lower positioning surface is fitted and fixed with the inner wall surface of the outer cylinder pipe mouth, which effectively ensures the concentricity of the outer cylinder pipe mouth and the high-pressure connecting pipe, reduces the complex work process of repeated fine-tuning and inspection, improves the working efficiency, and reduces the safety risks in assembly; and the raising protrusion of the adapter block is located at the edge of the outer cylinder pipe mouth with a radial extension structure, and the raising protrusion can fix the groove gap value, so that the groove gap will not become smaller as the welding seam shrinks, thereby ensuring the assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model.

[0027] Figure 2 The utility model is a schematic diagram of a use state.

[0028] Figure 3 for Figure 2 Partial cross-section view of section AA.

[0029] The meaning of the codes in the figure are: 1—adapter block; 2—raised protrusion; 3—upper positioning surface; 4—lower positioning surface; 5—outer cylinder pipe opening; 6—high-pressure connecting pipe; 7—lower guide slope; 8—upper guide slope. DETAILED DESCRIPTION

[0030] The utility model relates to an auxiliary tooling for assembling a steam turbine unit, specifically an auxiliary tooling for taking over a nuclear power high-pressure outer cylinder. Figure 1 , Figure 2 and Figure 3 The technical solution of the utility model is clearly and in detail explained.

[0031] See also Figure 1 , Figure 2 and Figure 3 As shown, an auxiliary tooling for a nuclear power high-voltage outer cylinder pipe connection is provided, the auxiliary tooling comprising a transfer block 1, the outer facade of the transfer block 1 comprising an outwardly convex raised protrusion 2; further, the top and bottom sides of the raised protrusion 2 are respectively planar structures, and the thickness between the upper and lower sides corresponds to the designed gap of the welding groove in the pipe connection operation.

[0032] The outer facade at the upper side of the aforementioned raised protrusion 2 has an upper positioning surface 3, and correspondingly, the outer facade at the lower side of the raised protrusion 2 has a lower positioning surface 4; further, the upper positioning surface 3 and the lower positioning surface 4 are matched with a coplanar structure and meet the concentricity requirements of the pipe connection operation.

[0033] The outer facade at the lower side of the aforementioned raised protrusion 2 has a lower guide slope 7 with an inclined structure located at the bottom of the lower positioning surface 4; correspondingly, the outer facade at the upper side of the raised protrusion 2 has an upper guide slope 8 with an inclined structure located at the top of the upper positioning surface 3.

[0034] During the pipe connection operation, multiple adapter blocks 1 are arranged at annular intervals on the inner side of the outer cylinder pipe mouth 5 of the high-pressure outer cylinder and fixed by spot welding. The fixed adapter blocks 1 are fixed by the lower positioning surface 4 and the inner wall surface of the outer cylinder pipe mouth 5. The padding protrusion 2 of the above-mentioned adapter block 1 is located at the edge of the outer cylinder pipe mouth 5 in a radially extended structure, and the two adjacent adapter blocks 1 in the annular direction are independent structures.

[0035] Correspondingly, the high-pressure pipe 6 is fixedly sleeved on the periphery of the adapter block 1 by spot welding. The upper positioning surface 3 of the aforementioned adapter block 1 is fitted and fixed to the inner wall surface of the high-pressure pipe 6. The bottom edge of the high-pressure pipe 6 is located on the raised protrusion 2 of the aforementioned adapter block 1. At this time, the aforementioned lower guide bevel 7 is inserted and arranged on the inner side of the outer cylinder pipe mouth 5; the aforementioned high-pressure pipe 6 is sleeved on the periphery of the aforementioned adapter block 1 through the upper guide bevel 8.

[0036] When the above auxiliary tooling is used for taking over operation, the operation is as follows:

[0037] Step 1. Take six adapter blocks 1 and evenly arrange them in the circumferential direction of the outer cylinder pipe mouth 5, contact the outer cylinder pipe mouth 5 through the lower guiding inclined surface 7 of the adapter block 1, and quickly guide the auxiliary tooling into the interior of the high-pressure cylinder pipe mouth;

[0038] Step 2. Adjust the gap between the lower positioning plane 4 of the adapter block 1 and the inner wall of the high-pressure cylinder so that the raised protrusion 2 is located at the edge of the outer cylinder pipe mouth 5 in a radially extended structure, and fix it by spot welding using argon arc welding;

[0039] Step 3. Use a magnetic crane to hoist the high-voltage pipe 6 to be assembled into the work area for joint docking and assembly;

[0040] Step 4. After the pipe is positioned, the high-voltage pipe and the adapter block are welded and fixed by argon arc welding;

[0041] Step 5. Weld the weld using full penetration welding;

[0042] During welding, the raised protrusion 2 can effectively fix the groove gap value, increase the welding force area, prevent the high-pressure pipe from sliding, increase the assembly progress, and reduce the safety risk during assembly;

[0043] Step 6. After the bottom cover welding is completed, take out the auxiliary tooling and weld the auxiliary tooling placement to complete the assembly.

[0044] The above specific technical solutions are only used to illustrate the present invention, rather than to limit it.

[0045] Although the present invention has been described in detail with reference to the above-mentioned specific technical solutions, those skilled in the art should understand that they can still modify the above-mentioned specific technical solutions, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the present invention.

Claims

1. An auxiliary tooling for taking over a nuclear power high-voltage outer cylinder, characterized in that: The auxiliary tooling comprises an adapter block (1), and the outer facade of the adapter block (1) comprises an outwardly convexly formed raising protrusion (2); An upper positioning surface (3) is provided on the outer facade at the upper side of the raised protrusion (2), and a lower positioning surface (4) is provided on the outer facade at the lower side of the raised protrusion (2), and the upper positioning surface (3) and the lower positioning surface (4) are matched with each other according to the concentricity requirement of the pipe connection operation; During the pipe connection operation, the adapter block (1) is arranged on the inner side of the outer cylinder pipe opening (5) of the high-pressure outer cylinder, and the lower side positioning surface (4) is fixedly fitted with the inner wall surface of the outer cylinder pipe opening (5), and the raised protrusion (2) of the adapter block (1) is located at the edge of the outer cylinder pipe opening (5) in a radially extended structure; the high-pressure pipe (6) is sleeved on the periphery of the adapter block (1), and the adapter block (1) is fixedly fitted with the inner wall surface of the high-pressure pipe (6) by the upper side positioning surface (3), and the bottom edge of the high-pressure pipe (6) is located on the raised protrusion (2) of the adapter block (1).

2. According to claim 1, the auxiliary tooling for connecting the high-voltage outer cylinder of a nuclear power plant is characterized by: The outer facade at the lower side of the raised protrusion (2) has a lower guide slope (7) with a slope structure at the bottom of the lower positioning surface (4); During the pipe connection operation, the adapter block (1) is inserted and arranged on the inner side of the outer cylinder pipe opening (5) via the lower guide inclined surface (7).

3. According to claim 1, the auxiliary tooling for connecting the high-voltage outer cylinder of a nuclear power plant is characterized by: The outer facade at the upper side of the raised protrusion (2) has an upper guide slope (8) with a slope structure formed at the top of the upper positioning surface (3); During the pipe connection operation, the high-pressure pipe (6) is sleeved onto the periphery of the adapter block (1) via the upper guide slope (8).

4. The auxiliary tooling for connecting the high-voltage outer cylinder of a nuclear power plant according to claim 1, 2 or 3, characterized in that: In the pipe connection operation, the transfer block (1) is a plurality of blocks arranged at an annular spacing; The two adjacent transfer blocks (1) in the annular direction are independent structures.

5. The auxiliary tooling for connecting the high-voltage outer cylinder of a nuclear power plant according to claim 1, 2 or 3, characterized in that: During the pipe connection operation, the adapter block (1) is fixedly connected to the outer cylinder pipe opening (5) by spot welding.

6. The auxiliary tooling for connecting the high-voltage outer cylinder of a nuclear power plant according to claim 1, 2 or 3, characterized in that: During the pipe connection operation, the adapter block (1) is fixedly connected to the high-voltage pipe (6) by spot welding.

7. According to claim 1, the auxiliary tooling for connecting the high-voltage outer cylinder of a nuclear power plant is characterized by: The thickness between the upper and lower sides of the raised protrusion (2) on the outer vertical surface of the adapter block (1) corresponds to the designed gap of the welding groove in the pipe connection operation.

8. The auxiliary tooling for connecting the high-voltage outer cylinder of a nuclear power plant according to claim 1 or 7, characterized in that: The top side and the bottom side of the raised protrusion (2) are respectively planar structures.

9. The auxiliary tooling for connecting the high-voltage outer cylinder of a nuclear power plant according to claim 1 is characterized by: The upper positioning surface (3) and the lower positioning surface (4) of the adapter block (1) cooperate in a coplanar structure.

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