A guide device for assembling a steam turbine valve

Abstract

The utility model relates to steam turbine valve assembly technical field discloses a guide device for steam turbine valve assembly, and the main steam valve has the adjusting valve groove and the make -up valve groove, the guide device has the inner guide subassembly and the outer guide subassembly, the inner guide subassembly has the first guide block, and the first guide block has the first connecting portion and the first guide portion, the first connecting portion links in the adjusting valve groove inner wall, and the first guide portion is located adjusting valve groove outside, the first guide portion has the first locating surface of adjusting valve positioning, and the first locating surface is flush with adjusting valve groove inner wall, the outer guide subassembly has the second guide block, and the second guide block has the second connecting portion and the second guide portion, and the second connecting portion links in the make -up valve groove outer wall, and the second guide portion is located make -up valve groove outside, the second guide portion has the second locating surface of make -up valve positioning, and the second locating surface is flush with make -up valve groove outer wall, the utility model can effectively control the radial misalignment of main steam valve and adjusting valve, main steam valve and make -up valve assembly time, improve assembly accuracy.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine valve assembly technology, specifically to a guiding device for assembling steam turbine valve assemblies. Background Technology

[0002] The turbine valve housing is large in size and weight. The main steam valve housing weighs about 30 tons and the regulating valve housing weighs about 20 tons. The overall height of the two combined is about 4 meters, and the weld bevel depth connecting the two is about 200 mm. The amount of welding is large. In order to better control the welding deformation and welding quality, the main steam valve and the regulating valve need to be assembled and welded using 2G horizontal welding position. This makes the assembly of the main steam valve and the regulating valve an irregular eccentric structure. In addition, the main steam valve and the regulating valve are prone to radial misalignment during assembly, which increases the difficulty of assembly. In addition, the steam replenishment valve needs to be precision machined before it is welded, and the dimensional accuracy after welding needs to be controlled within 3-6.5mm. However, the assembly operation space of the steam replenishment valve is small, and the main steam valve and the steam replenishment valve are prone to radial misalignment during assembly, resulting in out-of-tolerance dimensional accuracy, which increases the difficulty of assembly welding. Utility Model Content

[0003] The technical objective of this utility model is to provide a turbine valve assembly guide device that can effectively control radial misalignment during assembly between the main steam valve and the regulating valve, and between the main steam valve and the make-up steam valve, thereby improving assembly accuracy, in order to address the shortcomings of the prior art.

[0004] The technical solution adopted in this utility model is as follows: A guiding device for assembling a steam turbine valve group, the valve group including a main steam valve, a regulating valve, and a make-up steam valve; The main steam valve has a regulating valve bevel for connecting the regulating valve and a supplementary steam valve bevel for connecting the supplementary steam valve. The guiding device has an inner guiding component and an outer guiding component; The inner guide assembly has a first guide block, the first guide block having a first connecting part and a first guide part connected to each other, the first connecting part being connected to the inner wall of the regulating valve bevel, and the first guide part being located on the outer side of the regulating valve bevel; the first guide part having a first positioning surface for positioning the regulating valve, the first positioning surface being flush with the inner wall of the regulating valve bevel. The external guide assembly has a second guide block, the second guide block has a second connecting part and a second guide part connected to each other, the second connecting part is connected to the outer wall of the steam replenishment valve bevel, and the second guide part is located outside the steam replenishment valve bevel; the second guide part has a second positioning surface used to position the steam replenishment valve, and the second positioning surface is flush with the outer wall of the steam replenishment valve bevel.

[0005] The aforementioned technical measures, by setting a first guide block on the inner wall of the regulating valve bevel, allow the regulating valve to be positioned using the first positioning surface during the assembly of the main steam valve and the regulating valve. This effectively controls radial misalignment between the regulating valve and the main steam valve, improving assembly accuracy. The first positioning surface is flush with the inner wall of the regulating valve bevel, eliminating initial radial offset. Furthermore, by setting a second guide block on the outer wall of the supplementary steam valve bevel, two advantages are achieved: firstly, it facilitates operation when the supplementary steam valve bevel is small; secondly, during the assembly of the main steam valve and the supplementary steam valve, the supplementary steam valve can be positioned using the second positioning surface, effectively controlling radial misalignment between the supplementary steam valve and the main steam valve, improving assembly accuracy. The second positioning surface is flush with the outer wall of the supplementary steam valve bevel, eliminating initial radial offset.

[0006] Furthermore, the inner guide assembly has four first guide blocks, which are evenly arranged circumferentially along the inner wall of the regulating valve bevel.

[0007] The above-mentioned technical measures, by arranging four first guide blocks evenly in the circumference of the inner wall of the regulating valve bevel, can position the regulating valve in multiple directions during the assembly of the main steam valve and the regulating valve, effectively controlling the radial misalignment between the regulating valve and the main steam valve and improving the assembly accuracy.

[0008] Furthermore, the bevel of the regulating valve is a circular ring structure; Correspondingly, the first positioning surface is an arc-shaped structure, and the four first positioning surfaces are located on the same first cylindrical surface. The concentricity error between the first cylindrical surface and the inner wall of the regulating valve bevel is ≤0.03mm.

[0009] The above-mentioned technical measures, by ensuring that the four first positioning surfaces are located on the same first cylindrical surface and that the concentricity error between the first cylindrical surface and the inner wall of the regulating valve bevel is ≤0.03mm, help to eliminate initial radial misalignment, improve assembly accuracy, and at the same time ensure that the regulating valve can move smoothly for assembly.

[0010] Furthermore, the external guide assembly has four second guide blocks, which are evenly arranged circumferentially along the outer wall of the steam injection valve bevel.

[0011] The above-mentioned technical measures, by evenly arranging four second guide blocks on the outer wall of the steam replenishment valve bevel, enable the steam replenishment valve to be positioned in multiple directions during the assembly of the main steam valve and the steam replenishment valve, effectively controlling the radial misalignment between the steam replenishment valve and the main steam valve and improving the assembly accuracy.

[0012] Furthermore, the bevel of the steam replenishment valve is a circular ring structure; Correspondingly, the second positioning surface is an arc-shaped structure, and the four second positioning surfaces are located on the same second cylindrical surface. The concentricity error between the second cylindrical surface and the outer wall of the steam injection valve bevel is ≤0.03mm.

[0013] The above-mentioned technical measures, by ensuring that the four second positioning surfaces are located on the same second cylindrical surface and that the concentricity error between the second cylindrical surface and the outer wall of the steam replenishment valve bevel is ≤0.03mm, help to eliminate initial radial misalignment, improve assembly accuracy, and at the same time ensure that the steam replenishment valve can move freely for assembly.

[0014] Furthermore, the first guide portion also has a first guide surface for guiding the regulating valve, the first guide surface being a beveled structure.

[0015] The above-mentioned technical measures reduce assembly difficulty by setting a first guide surface with an inclined structure, so that the regulating valve will move along the inclined surface to contact the first positioning surface during assembly.

[0016] Furthermore, the second guide portion also has a second guide surface for guiding the steam replenishment valve, the second guide surface being a sloped structure.

[0017] The above-mentioned technical measures reduce assembly difficulty by setting a second guide surface with an inclined structure, so that the steam replenishment valve will move along the inclined surface to contact the second positioning surface during assembly.

[0018] Furthermore, the bevel of the regulating valve is a welded bevel; The bevel of the steam injection valve is a welded bevel.

[0019] Furthermore, the first guide block is provided with a through hole penetrating the first guide block; The second guide block is provided with a through hole penetrating the second guide block.

[0020] The above-mentioned technical measures facilitate the assembly of the first guide block and the second guide block at the bevel of the regulating valve and the bevel of the steam injection valve by setting through holes on the first guide block and the second guide block respectively. At the same time, it helps to avoid excessive processing and generate additional wear, and facilitates processing.

[0021] Furthermore, the first connecting portion of the first guide block is welded to the inner wall of the regulating valve bevel; The second connecting part of the second guide block is welded to the outer wall of the steam injection valve bevel.

[0022] The above-mentioned technical measures, through welding, help to enhance structural strength and improve connection stability.

[0023] One or more technical solutions provided by this utility model have at least the following technical effects or advantages: This invention, by setting a first guide block on the inner wall of the regulating valve bevel, allows the regulating valve to be positioned via a first positioning surface during the assembly of the main steam valve and the regulating valve. This effectively controls radial misalignment between the regulating valve and the main steam valve, improving assembly accuracy. The first positioning surface is flush with the inner wall of the regulating valve bevel, eliminating initial radial offset. Furthermore, by setting a second guide block on the outer wall of the supplementary steam valve bevel, it facilitates operation when the supplementary steam valve bevel is small. Additionally, during the assembly of the main steam valve and the supplementary steam valve, the supplementary steam valve can be positioned via a second positioning surface, effectively controlling radial misalignment between the supplementary steam valve and the main steam valve, improving assembly accuracy. The second positioning surface is flush with the outer wall of the supplementary steam valve bevel, eliminating initial radial offset. Attached Figure Description

[0024] The accompanying drawings, which are provided to further illustrate the embodiments of the present invention and constitute a part of the present invention, do not constitute a limitation thereof. Figure 1 This is a top view of the inner guide component in this utility model; Figure 2 This is a schematic diagram of the structure of the inner guide component in this utility model; Figure 3 This is a schematic diagram of the processing of the inner guide component in this utility model; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a reference diagram showing the usage state of the internal guide component in this utility model; Figure 6 yes Figure 5 Enlarged view of point B in the middle; Figure 7 This is a top view of the guide components in this utility model; Figure 8 This is a schematic diagram of a foreign guide component of this utility model; Figure 9 This is a schematic diagram of the processing of the foreign and domestic guide components of this utility model; Figure 10 yes Figure 9 Enlarged view of point C in the middle; Figure 11 This is a reference diagram showing the usage status of the foreign and domestic guide components in this utility model; Figure 12 yes Figure 11 Enlarged view of point D in the middle; Among them, 1-main steam valve; 2-regulating valve; 3-steam replenishment valve; 4-first guide block; 5-second guide block. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments of this utility model and the features within them can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0027] Example 1 Reference Figures 1-12 This embodiment provides a guiding device for assembling a steam turbine valve group, the valve group including a main steam valve 1, a regulating valve 2 and a make-up steam valve 3; The main steam valve 1 has a regulating valve bevel for connecting the regulating valve 2 and a supplementary steam valve bevel for connecting the supplementary steam valve 3; the regulating valve bevel is a welded bevel; the supplementary steam valve bevel is a welded bevel.

[0028] The guiding device has an inner guiding assembly and an outer guiding assembly; The inner guide assembly has a first guide block 4, the first guide block 4 has a first connecting part and a first guide part that are connected to each other, the first connecting part is connected to the inner wall of the regulating valve bevel, and the first connecting part of the first guide block 4 is connected to the inner wall of the regulating valve bevel by welding. The first guide portion is located outside the bevel of the regulating valve; the first guide portion has a first positioning surface used for positioning the regulating valve 2, and the first positioning surface is flush with the inner wall of the bevel of the regulating valve. The inner guide assembly has four first guide blocks 4, which are evenly arranged circumferentially along the inner wall of the regulating valve bevel.

[0029] The regulating valve has a circular bevel structure; Correspondingly, the first positioning surface is an arc-shaped structure, and the four first positioning surfaces are located on the same first cylindrical surface. The concentricity error between the first cylindrical surface and the inner wall of the regulating valve bevel is about 0.03 mm.

[0030] The outer guide assembly has a second guide block 5, which has a second connecting part and a second guide part that are connected to each other. The second connecting part is connected to the outer wall of the steam injection valve bevel, and the second connecting part of the second guide block 5 is connected to the outer wall of the steam injection valve bevel by welding.

[0031] The second guide portion is located outside the bevel of the steam replenishment valve; the second guide portion has a second positioning surface used to position the steam replenishment valve 3, and the second positioning surface is flush with the outer wall of the bevel of the steam replenishment valve.

[0032] The external guide assembly has four second guide blocks 5, which are evenly arranged circumferentially along the outer wall of the steam injection valve bevel.

[0033] The steam injection valve has a circular bevel structure. Correspondingly, the second positioning surface has an arc-shaped structure, and the four second positioning surfaces are located on the same second cylindrical surface. The concentricity error between the second cylindrical surface and the outer wall of the steam injection valve bevel is about 0.03mm.

[0034] The first guide section also has a first guide surface for guiding the regulating valve 2, and the first guide surface has an inclined structure.

[0035] The second guide section also has a second guide surface for guiding the steam replenishment valve 3, and the second guide surface has an inclined structure.

[0036] The first guide block 4 is provided with a through hole penetrating the first guide block 4; The second guide block 5 is provided with a through hole penetrating the second guide block 5.

[0037] In application, the main steam valve 1 is hoisted onto the assembly platform, with its large end face facing down and placed stably above the assembly platform. An inner guide assembly is welded into the steam outlet of the main steam valve 1, and each first guide block 4 is machined. Figures 3-4 The shaded part on the first guide block 4 is the processing part (that is, the shaded part is cut), so that the first positioning surface of the first guide block 4 is flush with the inner wall of the main steam valve 1. The regulating valve bevel between the main steam valve 1 and the regulating valve 2 is processed. The regulating valve 2 is hoisted and slowly moved down along the first guide surface of the first guide block 4. Through the positioning of the first positioning surface, it is stably placed above the main steam valve 1.

[0038] After completing the welding of regulating valve 2, flip the main steam valve 1 and regulating valve 2 so that the welding positions of the main steam valve 1 and the supplementary steam valve 3 are facing upwards, and install supporting braces to ensure the stability of the main steam valve 1 and regulating valve 2; weld an external guide device at the outer hole of the steam outlet of the main steam valve 1, and process each second guide block 5 ( Figures 9-10 The shaded part on the second guide block 5 is the processing part (that is, the shaded part is cut), so that the second positioning surface of the second guide block 5 is flush with the outer wall of the main steam valve 1. The bevel of the steam replenishment valve between the main steam valve 1 and the steam replenishment valve 3 is processed. The steam replenishment valve 3 is hoisted and slowly moved down along the second guide surface of the second guide block 5. Through the positioning of the second positioning surface, it is stably placed above the main steam valve 1.

[0039] Example 2 The rest of the content of this embodiment is the same as that of embodiment 1, except that: The concentricity error between the first cylindrical surface and the inner wall of the regulating valve bevel is approximately 0.02 mm.

[0040] The concentricity error between the second cylindrical surface and the outer wall of the steam injection valve bevel is approximately 0.02 mm.

[0041] Example 3 The rest of the content of this embodiment is the same as that of embodiment 1, except that: The concentricity error between the first cylindrical surface and the inner wall of the regulating valve bevel is approximately 0.01 mm.

[0042] The concentricity error between the second cylindrical surface and the outer wall of the steam injection valve bevel is approximately 0.01 mm.

[0043] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0044] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A guiding device for assembling a steam turbine valve group, the valve group comprising a main steam valve (1), a regulating valve (2), and a make-up steam valve (3); Its features are: The main steam valve (1) has a regulating valve bevel for connecting the regulating valve (2) and a supplementary steam valve bevel for connecting the supplementary steam valve (3); The guiding device has an inner guiding component and an outer guiding component; The inner guide assembly has a first guide block (4), the first guide block (4) has a first connecting part and a first guide part connected to each other, the first connecting part is connected to the inner wall of the regulating valve bevel, and the first guide part is located on the outer side of the regulating valve bevel; the first guide part has a first positioning surface used to position the regulating valve (2), and the first positioning surface is flush with the inner wall of the regulating valve bevel. The external guide assembly has a second guide block (5), the second guide block (5) has a second connecting part and a second guide part connected to each other, the second connecting part is connected to the outer wall of the steam replenishment valve bevel, and the second guide part is located outside the steam replenishment valve bevel; the second guide part has a second positioning surface used to position the steam replenishment valve (3), and the second positioning surface is flush with the outer wall of the steam replenishment valve bevel.

2. The turbine valve assembly guide device according to claim 1, characterized in that: The inner guide assembly has four first guide blocks (4), which are evenly arranged circumferentially along the inner wall of the regulating valve bevel.

3. The turbine valve assembly guide device according to claim 2, characterized in that: The regulating valve has a circular ring-shaped bevel. Correspondingly, the first positioning surface is an arc-shaped structure, and the four first positioning surfaces are located on the same first cylindrical surface. The concentricity error between the first cylindrical surface and the inner wall of the regulating valve bevel is ≤0.03mm.

4. The turbine valve assembly guide device according to claim 1, characterized in that: The external guide assembly has four second guide blocks (5), which are evenly arranged circumferentially along the outer wall of the steam valve bevel.

5. The turbine valve assembly guide device according to claim 4, characterized in that: The bevel of the steam injection valve is a circular ring structure; Correspondingly, the second positioning surface is an arc-shaped structure, and the four second positioning surfaces are located on the same second cylindrical surface. The concentricity error between the second cylindrical surface and the outer wall of the steam injection valve bevel is ≤0.03mm.

6. The turbine valve assembly guide device according to claim 1, characterized in that: The first guide portion also has a first guide surface for guiding the regulating valve (2), the first guide surface being a sloped structure.

7. The turbine valve assembly guide device according to claim 1, characterized in that: The second guide portion also has a second guide surface for guiding the steam replenishment valve (3), the second guide surface being a sloped structure.

8. The turbine valve assembly guide device according to claim 1, characterized in that: The bevel of the regulating valve is a welded bevel; The bevel of the steam injection valve is a welded bevel.

9. The turbine valve assembly guide device according to claim 1, characterized in that: The first guide block (4) is provided with a through hole penetrating the first guide block (4); The second guide block (5) is provided with a through hole that passes through the second guide block (5).

10. The turbine valve assembly guide device according to claim 1, characterized in that: The first connecting part of the first guide block (4) is welded to the inner wall of the regulating valve bevel; The second connecting part of the second guide block (5) is welded to the outer wall of the steam injection valve bevel.

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