Lifting tool for steam turbine partition plate stator blade assembling operation

Abstract

The utility model relates to the field of assembly equipment of steam turbine partition plate stator blades, and discloses a lifting tool for steam turbine partition plate stator blade assembly operation, the lifting tool is provided with a base plate, a bearing arm and a hanging plate, the bearing arm and the hanging plate are fixedly connected to the left side and the right side of the base plate in the width direction, and extend downwards; the bearing arm and the hanging plate form an inflection matching structure at the base plate and are provided with a hanging groove capable of hooking the partition plate; when the stator blade is assembled, the lifting tool is hooked at the top of the partition plate through the hanging groove, the base plate is located at the top of the partition plate, the hanging plate is located on the inner side of the partition plate, the bearing arm is located on the outer side of the partition plate, the bottom end of the bearing arm is provided with a bent supporting hook, and the end of the stator blade is located on the supporting hook of the bearing arm. According to the utility model, assembly personnel can be prevented from lifting the stationary blade all the time, the labor intensity and the operation difficulty are effectively reduced, and an operator can conveniently carry out throat width measurement and other operations; and meanwhile, the stator blade has a stable supporting point, so that the safety in the assembly process is ensured.

Description

Technical Field

[0001] This utility model relates to the field of assembly equipment for turbine diaphragm stationary blades, specifically, to a lifting fixture for assembling turbine diaphragm stationary blades. Background Technology

[0002] As a major component of a steam turbine, the diaphragm and its stationary blades are crucial parts of the flow path, serving as flow guides. Steam expands and accelerates within the stationary blade array, which consists of several stationary blades, converting thermal energy into kinetic energy. The profile design of the stationary blades and the uniformity of the flow area between two stationary blades directly affect the conversion of kinetic energy, while the precision of the stationary blade assembly is closely related to the flow area.

[0003] Each stationary blade requires pre-assembly, re-confirmation, and final spot welding for fixation. During the assembly process, the steam passage surface at the end of the baffle plate is in a vertical state without any support or fixing points. Assemblers need to continuously lift the stationary blade. Due to the long size, heavy weight, significant size difference between the two ends, and curved shape of the stationary blade, throat width measurement is inconvenient when assemblers are lifting the stationary blade, and the stationary blade is prone to falling, creating a safety hazard. Utility Model Content

[0004] The technical objective of this utility model is to provide a lifting fixture for assembling turbine diaphragm stationary blades, which is beneficial for reducing labor intensity, has high safety, and is easy to operate, in view of the special characteristics of the aforementioned turbine diaphragm stationary blades and the shortcomings of the existing technology.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A lifting fixture for assembling stationary blades of a steam turbine diaphragm, the lifting fixture having a base plate, a support arm and a hanging plate, the support arm and the hanging plate being fixedly connected to the left and right sides of the base plate in the width direction and extending downward, the support arm and the hanging plate forming a folded fit structure at the base plate and having a hanging groove for hooking the diaphragm.

[0007] During the assembly of the stationary blade, the lifting fixture is hooked to the top of the partition via a hanging groove. The base plate is located at the top of the partition, the hanging plate is located inside the partition, and the support arm is located outside the partition. The bottom end of the support arm has a bent hook, and the end of the stationary blade rests on the hook of the support arm.

[0008] The aforementioned technical measures address the unique characteristics of turbine diaphragm stationary blades. By using a support arm and a hanging plate to form a folded-back fit structure at the base plate, and a hanging groove for hooking the diaphragm, the lifting fixture is hung on the top of the diaphragm. The stationary blade is lifted by the hook of the bent structure at the bottom of the support arm. This avoids the assembly personnel having to continuously lift the stationary blade, effectively reducing labor intensity and operational difficulty, and facilitating operations such as throat width measurement. At the same time, it provides a stable support point for the stationary blade, which helps ensure safety during the assembly process.

[0009] Furthermore, the angle between the hook and the support arm is a right angle.

[0010] In the above-mentioned technical measures, the angle between the hook and the support arm is a right angle, which enables the hook to support the stationary blade more stably and helps to prevent the stationary blade from slipping off during assembly.

[0011] Furthermore, the effective width of the hanging groove is the thickness of the partition plate plus 0.5mm to 1.5mm.

[0012] The above-mentioned technical measures, by controlling the effective width of the hanging groove, ensure that the lifting fixture can be stably hung on the partition, which helps to avoid the lifting fixture from being easily displaced or falling off due to the hanging groove being too wide, and at the same time avoids the lifting fixture from being unable to be hung on the partition due to the hanging groove being too narrow.

[0013] Furthermore, the width of the hanging groove between the hanging plate and the supporting arm is greater than the thickness of the partition plate;

[0014] The mounting plate is equipped with locking bolts that can feed towards the partition and adjust the effective width of the mounting groove to match the partition;

[0015] When assembling the stationary blades, the distance between the locking bolt and the partition plate shall be ≤1.5mm.

[0016] The above-mentioned technical measures, by assembling locking bolts on the mounting plate that can feed towards the partition and adjust the effective width of the mounting groove to match the partition, and by ensuring that the distance between the locking bolts and the partition is ≤1.5mm when assembling the stationary blade, can both prevent the lifting fixture from accidentally shifting during the assembly of the stationary blade and allow the lifting fixture to move, thereby realizing the adjustment of the position of the stationary blade.

[0017] Furthermore, the hanging plate has a strip-shaped flat structure.

[0018] In the above technical measures, the hanging plate has a strip-shaped flat structure, which is simple and easy to form.

[0019] Furthermore, the substrate has at least one internally threaded tube, and the internally threaded tube is threadedly connected to an adjusting bolt;

[0020] The adjusting bolt passes through the internally threaded tube and abuts against the top of the partition.

[0021] The above-mentioned technical measures allow for adjustment of the height of the lifting fixture by turning the adjusting bolts, thereby adjusting the height of the stationary blades. The operation is simple.

[0022] Furthermore, the substrate has two internally threaded tubes, which are respectively arranged on the left and right sides along the length of the substrate.

[0023] The above-mentioned technical measures, by setting internally threaded tubes on the left and right sides along the length of the substrate, facilitate the adjustment of the height position of the stationary blades and enhance stability.

[0024] One or more technical solutions provided by this utility model have at least the following technical effects or advantages:

[0025] This invention addresses the unique characteristics of turbine diaphragm stationary blades by employing a folded-back fit structure formed by a support arm and a hanging plate at the base plate, along with a hanging groove for hooking the diaphragm. The lifting fixture is hung on top of the diaphragm, and the stationary blade is lifted via a hook formed by the bent structure at the bottom of the support arm. This design avoids requiring assembly personnel to continuously lift the stationary blade, effectively reducing labor intensity and operational difficulty, and facilitating operations such as throat width measurement. Simultaneously, it provides a stable support point for the stationary blade, ensuring safety during assembly. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 yes Figure 1 Schematic diagram at point A in the middle;

[0029] Figure 3 This is a top view of the present invention;

[0030] Figure 4 This is a schematic diagram of the usage state of this utility model;

[0031] Figure 5 yes Figure 4 Schematic diagram at point B in the middle;

[0032] Among them, 1-base plate; 2-hanging plate; 3-supporting arm; 4-internal threaded pipe; 5-adjusting bolt; 6-locking bolt; 7-partition plate; 8-support hook; 9-stationary blade. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] Example 1

[0036] Reference Figures 1-5 This embodiment provides a lifting fixture for assembling stationary blades of a steam turbine diaphragm. The lifting fixture has a base plate 1, a support arm 3 and a hanging plate 2. The support arm 3 and the hanging plate 2 are fixedly connected to the left and right sides in the width direction of the base plate 1 and extend downward. The support arm 3 and the hanging plate 2 form a folded fit structure at the base plate 1 and have a hanging groove for hooking the diaphragm 7.

[0037] When assembling the stationary blade 9, the lifting fixture is hooked to the top of the partition 7 via the hanging groove. The base plate 1 is at the top of the partition 7, the hanging plate 2 is inside the partition 7, and the support arm 3 is outside the partition 7. The bottom end of the support arm 3 has a bent hook 8, and the end of the stationary blade 9 is located on the hook 8 of the support arm 3.

[0038] The angle between the hook 8 and the support arm 3 is a right angle.

[0039] The effective width of the hanging groove is the thickness of the partition plate + 0.5mm.

[0040] The effective width refers to the width that satisfies the hook positioning and allows for relative displacement movement.

[0041] The width of the hanging groove between the hanging plate 2 and the supporting arm 3 is greater than the thickness of the partition plate;

[0042] The mounting plate 2 is equipped with locking bolts 6 that can feed towards the partition plate 7 and adjust the effective width of the mounting groove to match the partition plate 7;

[0043] When assembling the stationary blade 9, the distance between the locking bolt 6 and the partition plate 7 is 1.5mm.

[0044] The hanging panel 2 has a strip-shaped flat structure.

[0045] The substrate 1 has at least one internally threaded tube 4, and the internally threaded tube 4 is threadedly connected to an adjusting bolt 5; there are two internally threaded tubes 4 on the substrate 1, which are respectively arranged on the left and right sides of the substrate 1 along its length.

[0046] The adjusting bolt 5 passes through the internally threaded tube 4 and abuts against the top of the partition 7.

[0047] In application, hang the lifting fixture on the partition 7, so that the adjusting bolt 5 abuts against the top of the partition 7. Tighten the locking bolt 6 to make the gap between the locking bolt 6 and the partition 7 1.5mm. Place the stationary blade 9 on the hook 8 and push the lifting fixture within 1mm of the preset installation position. Use a copper hammer to tap the lifting fixture to reach the preset installation position. Tighten the adjusting bolt 5 to adjust the height of the lifting fixture based on the preset installation position, thereby adjusting the height of the stationary blade 9. After adjustment, the throat width and other data can be measured. If the data is not qualified, continue to adjust the position of the stationary blade 9 using the lifting fixture until the data is qualified. After the data is qualified, weld the stationary blade 9. After the fixation is completed, loosen the adjusting bolt 5 and the locking bolt 6, and the lifting fixture can be removed to assemble the next stationary blade.

[0048] Example 2

[0049] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0050] The effective width of the hanging groove is the thickness of the partition plate + 1.5mm.

[0051] When assembling the stationary blade 9, the distance between the locking bolt 6 and the partition plate 7 is 1mm.

[0052] Example 3

[0053] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0054] The effective width of the hanging groove is 7mm thick partition + 1mm.

[0055] When assembling the stationary blade 9, the distance between the locking bolt 6 and the partition plate 7 is 0.8mm.

[0056] 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.

[0057] 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 lifting fixture for assembling stationary blades of a steam turbine diaphragm, characterized in that: The lifting fixture has a base plate (1), a support arm (3) and a hanging plate (2). The support arm (3) and the hanging plate (2) are fixedly connected to the left and right sides of the base plate (1) in the width direction and extend downward. The support arm (3) and the hanging plate (2) form a fold-back fit structure at the base plate (1) and have a hanging groove for hooking the partition plate (7). When assembling the stationary blade (9), the lifting fixture is hooked to the top of the partition (7) through the hanging groove. The base plate (1) is located at the top of the partition (7), the hanging plate (2) is located on the inner side of the partition (7), and the support arm (3) is located on the outer side of the partition (7). The bottom end of the support arm (3) has a bent hook (8), and the end of the stationary blade (9) is located on the hook (8) of the support arm (3).

2. The lifting fixture for assembling turbine diaphragm stationary blades according to claim 1, characterized in that: The angle between the hook (8) and the support arm (3) is a right angle.

3. The lifting fixture for assembling turbine diaphragm stationary blades according to claim 1, characterized in that: The effective width of the hanging groove is the thickness of the partition (7) + 0.5mm to 1.5mm.

4. The lifting fixture for assembling turbine diaphragm stationary blades according to claim 1, characterized in that: The width of the hanging groove between the hanging plate (2) and the supporting arm (3) is greater than the thickness of the partition plate; The mounting plate (2) is equipped with a locking bolt (6) that can feed toward the partition plate (7) and adjust the effective width of the mounting groove to match the partition plate (7); When assembling the stationary blade (9), the distance between the locking bolt (6) and the partition plate (7) is ≤1.5mm.

5. The lifting fixture for assembling turbine diaphragm stationary blades according to claim 1, characterized in that: The hanging plate (2) has a strip-shaped flat structure.

6. The lifting fixture for assembling turbine diaphragm stationary blades according to claim 1, characterized in that: The substrate (1) has at least one internally threaded tube (4), and the internally threaded tube (4) is threadedly connected to an adjusting bolt (5). The adjusting bolt (5) passes through the internally threaded tube (4) and abuts against the top of the partition (7).

7. The lifting fixture for assembling turbine diaphragm stationary blades according to claim 1, characterized in that: There are two internally threaded tubes (4) on the substrate (1), which are arranged on the left and right sides of the substrate (1) along its length.

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