CN115163227A - Auxiliary device and method for disassembling corrugated expansion joint of steam turbine - Google Patents
Auxiliary device and method for disassembling corrugated expansion joint of steam turbine Download PDFInfo
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- CN115163227A CN115163227A CN202210948383.XA CN202210948383A CN115163227A CN 115163227 A CN115163227 A CN 115163227A CN 202210948383 A CN202210948383 A CN 202210948383A CN 115163227 A CN115163227 A CN 115163227A
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- expansion joint
- steam turbine
- corrugated expansion
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- rotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention aims to provide a turbine corrugated expansion joint dismounting auxiliary device and a dismounting method, which can effectively improve the stability of a corrugated expansion joint in the process of dismounting and overhauling a turbine. The corrugated expansion joint dismounting auxiliary device comprises an inner connecting part and an outer connecting part, wherein the inner connecting part is positioned on the inner side and used for being connected with a rotor part of the steam turbine, and the outer connecting part is positioned on the outer side and used for being connected with the corrugated expansion joint of the steam turbine; the inner connecting part is positioned between the peripheral surface of the rotor part and the corrugated expansion joint, and the connecting point between the outer connecting part and the corrugated expansion joint is positioned at one end of the corrugated expansion joint.
Description
Technical Field
The invention relates to the field of auxiliary dismounting devices for steam turbine equipment, in particular to an auxiliary dismounting device and a method for a corrugated expansion joint of a steam turbine.
Background
Steam turbines are the main equipment of modern thermal power plants, and are also used in the metallurgical industry, chemical industry and ship power plants. The steam turbine is also called a steam turbine engine, and is a rotary steam power device, and high-temperature and high-pressure steam passes through a fixed nozzle to become accelerated airflow and then is sprayed onto blades, so that a rotor provided with blade rows rotates, and simultaneously, the rotor does work outwards. The steam turbine can convert steam heat energy into mechanical work, and after steam from the boiler enters the steam turbine, the steam heat energy sequentially passes through a series of annularly configured nozzles and movable blades to be converted into mechanical energy for rotating a rotor of the steam turbine. The steam is converted in different ways in the steam turbine, so that the steam turbine with different working principles is formed. When the steam turbine is disassembled and overhauled, the steam turbine needs to be hoisted and moved by using a large tool.
The steam turbine rotor hoisting device disclosed in the Chinese utility model patent application with the application number of CN202023115348.5 comprises a steam turbine rotor hoisting belt, a hoisting beam, a pulley A, a saddle, a pin shaft, a hoisting beam lifting lug, a screw rod and a travelling crane lifting hook, wherein a hoisting beam hoisting point is a hoisting device hoisting point which penetrates through a hoisting beam main body and is welded with the middle position of the hoisting beam main body; the hanging beam hanging strip is hung on the hanging beam main body through a sliding saddle and is symmetrically distributed on two sides of the hanging beam main body in the center, and the sliding saddle can slide on the hanging beam main body; the steam turbine rotor sling is connected with the hanging beam sling, and the steam turbine rotor sling is sleeved on the steam turbine rotor; the sleeve is fastened on a lifting beam lug, the pin shaft is installed in the sleeve, the center of the pin shaft is provided with threads and is matched and connected with the screw rod, the lifting beam lug is connected with a crane lifting hook, the pulley A is fastened on the screw rod, and the pulley A and the screw rod form a whole; the crane hook is connected with the hanging point of the hanging beam through a pin shaft, and the crane hook, the hanging point of the hanging beam and the hanging point form a bearing point of the hoisting device.
The lifting tool for the steam turbine rotor disclosed in the Chinese utility model patent application with the application number of CN202023115348.5 comprises a cross beam, wherein a pair of lower lifting frames are hung on the cross beam and are symmetrically arranged relative to the gravity center line of the cross beam, and the lower lifting frames are provided with lower suspension cables for hanging the steam turbine rotor; a hanger is arranged on the top surface of the beam and positioned on the gravity line of the beam and is used for being hooked by a crane hook; the lower hanging frames are movably connected with the cross beam, and the span of the two lower hanging frames can be freely adjusted; the beam is also provided with a pair of upper hanging frames which are symmetrically arranged relative to the gravity center line of the beam, and the upper hanging frames are provided with upper suspension cables for being hooked by a crane hook; the upper hanger is in a shaft-shaped structure, a hole matched with the shaft-shaped structure is formed in the cross beam, and the upper hanger is arranged in the hole; the length of the shaft is greater than that of the hole, two ends of the shaft respectively extend out of two ports of the hole, and the lengths of the extending parts are the same; flanges are arranged at two ends of the shaft respectively, a gap space is formed between the flanges and the hole opening, and the upper sling is positioned in the gap space to hang the shaft.
However, in large steam turbine equipment, two expansion joints are usually designed and installed at the end of the rotor and sleeved at the two ends of the rotor, and the deformation of the outer cylinder can be absorbed by the expansion joints and cannot be transmitted to the shaft seal, so that the friction between the rotor and the shaft seal is reduced. Expansion joints used in steam turbines are typically mounted in a relatively movable manner on the rotor of the steam turbine. When the steam turbine is disassembled and overhauled, the rotor and the corresponding movable part installed on the rotor need to be disassembled together in a hoisting mode relative to the main body of the steam turbine. In order to avoid the danger that the movement of the expansion joint influences the overall balance of the hoisting system or even separation and falling during the rotary overhaul of the rotor, the expansion joint needs to be independently hoisted and disassembled before the overhaul and maintenance of the rotor of the steam turbine. Due to the fact that the expansion joint is large in weight and size, high-risk operations such as expansion joint hoisting steps and sling reversing are added in the dismounting process, operation procedures and time are increased, other parts are easy to damage due to collision, and the expansion joint is quite inconvenient.
Aiming at the problems, the invention provides the auxiliary device and the method for disassembling the corrugated expansion joint of the steam turbine, which can effectively improve the stability of the corrugated expansion joint of the steam turbine in the disassembling and overhauling processes.
Disclosure of Invention
The invention provides a turbine corrugated expansion joint dismounting auxiliary device and a dismounting method, which can effectively improve the stability of a corrugated expansion joint in the process of dismounting and overhauling a turbine.
The technical purpose of the invention is realized by the following technical scheme:
a corrugated expansion joint dismounting auxiliary device of a steam turbine comprises an inner connecting part and an outer connecting part, wherein the inner connecting part is positioned on the inner side and used for being connected with a rotor part of the steam turbine, and the outer connecting part is positioned on the outer side and used for being connected with a corrugated expansion joint of the steam turbine; the inner connecting part is positioned between the peripheral surface of the rotor part and the corrugated expansion joint, and the connecting point between the outer connecting part and the corrugated expansion joint is positioned at one end of the corrugated expansion joint.
In a preferred aspect of the present invention, the inner connection portion is located between both end surfaces of the bellows expansion joint in an axial direction of the rotor portion.
Preferably, the inner connecting part is formed on an inner connecting component near the inner side of the device, the outer connecting part is formed on an outer connecting component near the outer side of the device, the inner connecting component and the outer connecting component are fixedly connected through a detachable connecting structure, the detachable connecting structure comprises an inner connecting notch and an outer connecting notch which are respectively positioned on the inner connecting component and the outer connecting component, and a fastening connecting piece which can lock and fix the two components by simultaneously penetrating through the inner connecting notch and the outer connecting notch.
Preferably, the inner connecting part of the inner connecting assembly is annular as a whole, and the outer connecting assemblies are uniformly arranged around the periphery of the inner connecting part at intervals; the periphery of the inner connecting part protrudes outwards to form an outward extending section used for being connected with the outer connecting component close to the outer side.
Preferably, the inner connecting part is a split structure formed by connecting a plurality of arc segments.
Preferably, the external connection assembly further comprises a bending extension section connected with the extending extension section; the rotor part is provided with an outer connection part and an inner connection notch, the rotor part is provided with an outer extension part and an outer connection notch, the outer connection part is provided with an inner connection notch and an outer connection notch, the inner connection notch and the outer connection notch are respectively arranged on the outer extension part and the bending extension part, and the outer connection notch is arranged on the outer connection notch.
Preferably, a transition stiffening rib for improving the connection strength of the bending part is further arranged at the connection transition part between the bending extension section and the external connection part.
Preferably, the inner connection assembly and the outer connection assembly have a plurality of mounting positions therebetween for achieving connection and fixation of the inner connection assembly and the outer connection assembly at different relative positions in the rotor portion axial direction.
As a preferable aspect of the present invention, at least one of the pair of the inner and outer coupling notches, which are fitted to each other, has an elongated shape extending in the rotor axis direction.
A method for disassembling a corrugated expansion joint of a steam turbine comprises the auxiliary device for disassembling the corrugated expansion joint of the steam turbine, and comprises the following steps:
a. mounting an inner connecting component at one end of a rotor part of the steam turbine in a surrounding manner, and enabling the inner wall surface of an inner connecting part in the inner connecting component to be attached to the outer wall surface of the rotor part;
b. arranging each outer connecting component in a mode of surrounding the inner connecting component, and fixing each outer connecting component on the outer side of the inner connecting component in sequence by using the fastening connecting piece;
c. connecting and fixing an external connecting assembly and the end part of the corrugated expansion joint so that the turbine corrugated expansion joint dismounting auxiliary device and the corrugated expansion joint are connected into a whole;
d. and hoisting and disassembling the whole formed by connecting the corrugated expansion joint disassembly auxiliary device and the corrugated expansion joint of the steam turbine by using external hoisting equipment.
In summary, the invention can achieve the following beneficial effects:
1. the auxiliary device for disassembling the corrugated expansion joint of the steam turbine can connect and fix the corrugated expansion joint which is easy to move in the hoisting and overhauling processes with the rotor part, so that the rotor part and the corrugated expansion joint form a stably connected integral structure. The auxiliary device for disassembling the corrugated expansion joint of the steam turbine can effectively avoid the corrugated expansion joint from moving to two sides when the rotor part is disassembled from the steam turbine main body, so that the integral gravity center of the rotor is stabilized, and a hoisting system is placed to overturn and possibly cause safety accident risks; certainly rotating gradually to the rotor portion and examining and repairing the in-process of maintaining, also can guarantee that holistic focus is located the center pin of rotor portion all the time, reduce the hindrance effect and the wearing and tearing effect between the part of rotatory in-process, play effectual safeguard effect.
2. The auxiliary device for disassembling the corrugated expansion joint of the steam turbine, disclosed by the invention, is used for connecting and fixing the corrugated expansion joint and the rotor part, so that the rotor part and the corrugated expansion joint form a stably connected whole, the disassembling process of the corrugated expansion joint in the hoisting process is omitted, the operation processes of hoisting, overhauling and maintaining are greatly reduced, and the working efficiency is effectively improved.
3. According to the auxiliary device for disassembling the corrugated expansion joint of the steam turbine, the inner connecting assembly is preferably connected with the rotor part through the attaching contact of the arc surface, the connecting point between the outer connecting assembly and the corrugated expansion joint is located at the end part of the corrugated expansion joint, the abrasion and collision effects on the inner wall surface of the corrugated expansion joint can be greatly reduced on the premise of ensuring the stable supporting effect, and therefore the effective protection effect is achieved.
4. In a preferred scheme of the auxiliary device for disassembling the corrugated expansion joint of the steam turbine, a split structure is adopted no matter the inner connecting part or the outer connecting component and the inner connecting component, so that the corrugated expansion joint can be quickly assembled and disassembled at the actual assembling position, and the device is convenient and efficient.
5. According to the auxiliary device for disassembling the corrugated expansion joint of the steam turbine, the connecting point of the outer connecting component and the corrugated expansion joint is arranged at one end of the corrugated expansion joint, the inner connecting part which is attached to the rotor part and plays a supporting role is arranged between two ends of the corrugated expansion joint, a plurality of mounting positions are arranged, and the condition that the bearing stress of the contact position point of the inner connecting part of the auxiliary device which is arranged on one side and the rotor part of the steam turbine is unbalanced can be effectively relieved by adjusting the actual mounting positions, so that the local abrasion in the process of overhauling and maintaining is reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of a corrugated expansion joint dismounting auxiliary device of a steam turbine;
FIG. 2 is a schematic side view of a turbine bellows expansion joint disassembly aid;
FIG. 3 is an enlarged schematic view of an interconnect assembly;
FIG. 4 is a schematic view of the inner connecting member and the outer connecting member;
FIG. 5 is a schematic structural diagram of a corrugated expansion joint dismounting auxiliary device and a corrugated expansion joint of a steam turbine when the corrugated expansion joint dismounting auxiliary device and the corrugated expansion joint are fixedly connected with each other;
fig. 6 is a schematic diagram of the process steps when the corrugated expansion joint needs to be hoisted and dismantled in a conventional state.
In the figure:
1-rotor part;
2-corrugated expansion joint;
3-inner connection component, 301-inner connection part, 302-flared extension;
4-external connection component, 401-external connection component, 402-bending extension section;
5-detachable connecting structure, 501-inner connecting notch, 502-outer connecting notch, 503-fastening connecting piece;
6-transition stiffening rib.
Detailed Description
The following specific examples are to be construed as merely illustrative, and not limitative of the remainder of the disclosure in any way whatsoever, and after a reading of this specification, a person skilled in the art will be able to make modifications to the examples as required without any inventive contribution but only subject to the scope of the appended claims.
The scheme is realized by the following technical means:
example (b): in this embodiment, a turbine corrugated expansion joint dismounting auxiliary device capable of effectively improving the stability of the turbine corrugated expansion joint 2 in the disassembly and maintenance process is provided. The main body of the auxiliary device is installed and arranged between the outer wall of the steam turbine rotor part 1 and the inner wall of the corrugated expansion joint 2. The inner connecting part 301 is positioned on the inner side and used for being connected with a rotor part 1 of the steam turbine, and the outer connecting part 401 is positioned on the outer side and used for being connected with a corrugated expansion joint 2 of the steam turbine; the inner connection portion 301 is located between the outer peripheral surface of the rotor portion 1 and the bellows expansion joint 2, and the connection point between the outer connection portion 401 and the bellows expansion joint 2 is located at one end of the bellows expansion joint 2.
Specifically, structurally, the auxiliary device for detaching the bellows expansion joint of the steam turbine is mainly composed of an inner connecting member 3 and an outer connecting member 4 which are connected to each other, the inner connecting portion 301 is formed on the inner connecting member 3 on the inner side of the device, and the outer connecting portion 401 is formed on the outer connecting member 4 on the outer side of the device. Here, the inner connection portion 301 is used to connect with a cylindrical partial section of the rotor portion 1, so that the inner connection portion 301 is also designed to be a circular ring with a smooth inner wall, and for easy assembly and disassembly, the circular inner connection portion 301 may be further disassembled to form a plurality of circular segments connected with each other. For example, referring to the structure shown in the drawings of the invention, a structural form that an upper semicircular arc section and a lower semicircular arc section are mutually connected in a tail way at the position of the rotor part 1 corresponding to the corrugated collision joint and are connected by bolt assemblies at two sides to form a finished annular part is adopted. The inner connecting member 3 further includes a flared extension 302 formed by the outward protrusion of the outer circumference of the annular inner connecting portion 301 and connected to the outward outer connecting member 4. In this embodiment, the flared extension 302 is integrally rectangular block-shaped, and four flared extensions 302 are integrally connected to the outer periphery of the inner connection portion 301 in a ring shape, and the four flared extensions 302 are uniformly mounted and connected to the outer peripheral surface of the inner connection portion 301 at intervals equal to each other with an internal angle of ninety degrees as a separation distance.
As for the mounting of the externally provided exterior connection members 4, the number thereof corresponds to the number of the aforementioned flared extensions 302, and therefore four sets are also employed in the present embodiment and correspond to the arrangement positions of the aforementioned flared extensions 302. The outer connecting member 4 includes the outer connecting portion 401 for connecting and fixing with the bellows expansion joint 2 and the bent extension 402 for connecting and fixing with the inner connecting member 3. Specifically, the outer joint member 4 is formed in an L shape as a whole, wherein a portion extending outward in a vertical plane is an outer joint portion 401, and forms an included angle of ninety degrees with the outer joint portion 401, and a portion extending in a direction parallel to the axis of the rotor portion 1 is a bent extension 402. The outer connecting part 401 and the bending extension part 402 are formed together, and in view of the bearing strength, a transition stiffening rib 6 connected with the two parts at the position of the bending transition connection is arranged. Because the end face of the corrugated expansion joint 2 only plays a role of resisting in the using process, a threaded hole can be formed in the end face of the corrugated expansion joint 2, and the outer connecting component 4 and the corrugated expansion joint 2 are locked, connected and fixed after a bolt penetrates through a mounting hole formed in the outer connecting part 401 and the threaded hole.
The inner connecting component 3 and the outer connecting component 4 are in a split form and are fixedly connected through a detachable connecting structure 5. Specifically, an inner connection notch 501 and an outer connection notch 502 which are radially penetrated along the rotor portion 1 are respectively formed on the flared extension section 302 and the bent extension section 402, and the connection and fixation between the two components can be realized through a pair of bolts and nuts serving as fastening connection pieces 503.
Preferably, a plurality of mounting positions may be provided between the inner connection assembly 3 and the outer connection assembly 4 to connect and fix the inner connection assembly 3 and the outer connection assembly 4 at different relative positions in the axial direction of the rotor portion 1. Specifically, at least one of a pair of the inner and outer connecting notches 501 and 502, which are fitted to each other, has an elongated shape extending in the rotor axis direction. Through the setting of this structure, can accomplish the locking before fixed at fastening connection spare 503, adjust the relative position between outer coupling assembling 4 and the interior coupling assembling 3 on the steam turbine rotor portion 1 axis direction, under the prerequisite that interior connecting portion 301 does not stand out in ripple expansion joint 2 terminal surface, connect and become a holistic steam turbine ripple expansion joint and dismantle auxiliary device and ripple expansion joint 2's focus and fall on the interior connecting portion 301 that plays the bearing effect, make the atress on the contact position more balanced.
When the corrugated expansion joint dismounting auxiliary device of the steam turbine is installed, the method is sequentially operated according to the following steps: a. when the corrugated expansion joint dismounting auxiliary device of the steam turbine is mounted, the following steps are sequentially mounted for connection and fixation: mounting an inner connecting component 3 at one end of a rotor part 1 of the steam turbine in a surrounding way, and enabling the inner wall surface of an inner connecting part 301 in the inner connecting component 3 to be attached to the outer wall surface of the rotor part 1; b. arranging each external connection assembly 4 in a manner of surrounding the internal connection assembly 3 and fixing each external connection assembly 4 to the outside of the internal connection assembly 3 in turn by using the fastening connection member 503; c. connecting and fixing an external connecting assembly 4 and the end part of the corrugated expansion joint 2 so that the turbine corrugated expansion joint dismounting auxiliary device is connected with the corrugated expansion joint 2 to form a whole; d. and hoisting and disassembling the whole formed by connecting the corrugated expansion joint disassembly auxiliary device of the steam turbine and the corrugated expansion joint 2 by using external hoisting equipment.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a steam turbine ripple expansion joint dismantles auxiliary device which characterized in that: comprises an inner connecting part (301) which is positioned at the inner side and is used for being connected with a rotor part (1) of the steam turbine, and an outer connecting part (401) which is positioned at the outer side and is used for being connected with a corrugated expansion joint (2) of the steam turbine; the inner connecting part (301) is located between the outer peripheral surface of the rotor part (1) and the corrugated expansion joint (2), and a connecting point between the outer connecting part (401) and the corrugated expansion joint (2) is located at one end of the corrugated expansion joint (2).
2. The steam turbine bellofram disassembly aid of claim 1 wherein: the inner connecting part (301) is located between two end faces of the corrugated expansion joint (2) along the axial extension direction of the rotor part (1).
3. The steam turbine bellofram disassembly aid of claim 2, wherein: interior connecting portion (301) are formed on the device leans on inboard in-connection subassembly (3), and outer connecting portion (401) are formed on the device leans on outer coupling assembling (4) in the outside, in-connection subassembly (3) with be connected fixedly through dismantling connection structure (5) between outer coupling assembling (4), it is located respectively to contain in the connection structure (5) in-connection subassembly (3) and outer coupling assembling (4) in interior connection notch (501) and outer connection notch (502), and can pass simultaneously interior connection notch (501) and outer connection notch (502) lock fixed fastening connection spare (503) with two parts.
4. The steam turbine bellofram disassembly aid of claim 3, wherein: the inner connecting part (301) in the inner connecting assembly (3) is integrally annular, and the outer connecting assemblies (4) are uniformly arranged around the periphery of the inner connecting part (301) at intervals; the periphery of the inner connecting part (301) protrudes outwards to form an outward extending section (302) which is used for being connected with the outer connecting component (4) close to the outer side.
5. The steam turbine bellofram expansion joint disassembly assisting device of claim 4, wherein: the inner connecting part (301) is a split structure formed by connecting a plurality of arc-shaped sections.
6. The steam turbine bellofram expansion joint disassembly assisting device of claim 4, wherein: the external connecting component (4) also comprises a bending extension section (402) connected with the extending extension section (302); the bending extension section (402) extends along the axial direction of the rotor part (1) as a whole, the outer connecting part (401) extends along the radial direction of the rotor part (1) as a whole, and the inner connecting notch (501) and the outer connecting notch (502) are respectively arranged on the extending section (302) and the bending extension section (402).
7. The steam turbine bellofram expansion joint disassembly assisting device of claim 6, wherein: transition stiffening ribs (6) which play a role in improving the connection strength of the bending part are further arranged at the connection transition part between the bending extension section (402) and the outer connecting part (401).
8. The steam turbine bellofram disassembly aid of claim 7, wherein: the inner connecting assembly (3) and the outer connecting assembly (4) are provided with a plurality of mounting positions therebetween, and the inner connecting assembly (3) and the outer connecting assembly (4) are fixedly connected at different relative positions along the axial direction of the rotor part (1).
9. The steam turbine bellofram disassembly aid of claim 8, wherein: at least one of a pair of the inner connecting notch (501) and the outer connecting notch (502) that are fitted to each other is elongated in the rotor axis direction.
10. A method for disassembling a corrugated expansion joint of a steam turbine is characterized by comprising the following steps: the steam turbine bellows expansion joint disassembly assisting device comprising the steam turbine bellows expansion joint disassembly assisting device of claim 9, comprises the following steps:
a. mounting an inner connecting component (3) at one end of a rotor part (1) of the steam turbine in a surrounding manner, and enabling the inner wall surface of an inner connecting part (301) in the inner connecting component (3) to be attached to the outer wall surface of the rotor part (1);
b. arranging each external connecting component (4) in a mode of surrounding the internal connecting component (3) and fixing each external connecting component (4) on the outer side of the internal connecting component (3) in sequence by using the fastening connecting piece (503);
c. connecting and fixing an external connecting assembly (4) and the end part of the corrugated expansion joint (2) so that the turbine corrugated expansion joint dismounting auxiliary device is connected with the corrugated expansion joint (2) to form a whole;
d. and hoisting and disassembling the whole formed by connecting the turbine corrugated expansion joint disassembly auxiliary device and the corrugated expansion joint (2) by using external hoisting equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210948383.XA CN115163227A (en) | 2022-08-09 | 2022-08-09 | Auxiliary device and method for disassembling corrugated expansion joint of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210948383.XA CN115163227A (en) | 2022-08-09 | 2022-08-09 | Auxiliary device and method for disassembling corrugated expansion joint of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115163227A true CN115163227A (en) | 2022-10-11 |
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ID=83479263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210948383.XA Pending CN115163227A (en) | 2022-08-09 | 2022-08-09 | Auxiliary device and method for disassembling corrugated expansion joint of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115163227A (en) |
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2022
- 2022-08-09 CN CN202210948383.XA patent/CN115163227A/en active Pending
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