CN117147164B - Hole detection device for double-layer casing of aero-engine - Google Patents
Hole detection device for double-layer casing of aero-engine Download PDFInfo
- Publication number
- CN117147164B CN117147164B CN202311439366.4A CN202311439366A CN117147164B CN 117147164 B CN117147164 B CN 117147164B CN 202311439366 A CN202311439366 A CN 202311439366A CN 117147164 B CN117147164 B CN 117147164B
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- hole
- inner casing
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- 238000001514 detection method Methods 0.000 title claims abstract description 97
- 230000000903 blocking effect Effects 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims description 26
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 230000000670 limiting effect Effects 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
Abstract
The application belongs to the technical field of aeroengines, and in particular relates to a hole detection device for a double-layer casing of an aeroengine, which comprises: the outer casing Kong Tan plug assembly is arranged on the outer casing hole detection seat; an inner casing Kong Tan blocking rod mounted on the inner casing hole detection seat; the outer casing Kong Tan plug assembly is provided with a sleeve, the inner casing hole plugging rod is provided with an inner casing plugging rod boss formed by radial protrusions, and the part of the inner casing hole plugging rod with the inner casing plugging rod boss is sleeved in the sleeve with a gap; the tail end of the part of the inner casing hole plug rod exposed out of the sleeve is provided with a ball head structure; the sleeve is provided with the spring for enabling the ball head structure to be kept against the inner casing Kong Tan seat hole exploratory hole outlet, the problem that the current hole exploratory plug needs to be disassembled and assembled in two steps by adopting a special tool is solved, and the synchronous disassembly and assembly of the inner culvert plug and the outer culvert plug by adopting a general tool are achieved.
Description
Technical Field
The application belongs to the technical field of aeroengines, and particularly relates to a hole detection device for a double-layer casing of an aeroengine.
Background
The whole life cycle of the aeroengine is developed and used, and hole detection and inspection are required to be carried out on different structural parts of the engine regularly, so that a plurality of hole detection and inspection devices are arranged on each engine, and the double-layer casing is a common application part of the hole detection structure. Due to the different working environments, material selection and structural design of the double-layer casing, under the action of high-temperature and high-pressure gas of an engine, the positions of the inner casing hole and the outer casing hole can be displaced relatively due to different linear expansion coefficients.
The existing double-layer casing hole detection device mainly comprises an outer casing Kong Tan plug assembly, an outer casing hole detection seat, an inner casing Kong Tan plug, an inner casing Kong Tan seat and the like. An external air channel is arranged between the outer casing shell and the inner casing shell, and an internal high-temperature high-pressure air channel is arranged inside the inner casing shell. Under the working state of the engine, the outer casing Kong Tan plug assembly is tightly pressed and attached to the inner platform of the outer casing hole probe seat through the threads of the outer casing hole probe seat, the sealing of the outer duct gas is realized, and the self-locking assembly of the outer casing Kong Tan plug assembly is realized by adopting balls. The inner casing Kong Tan plug is assembled in the blind cavity of the inner casing hole detection seat, and under the limiting action of the spring and the inner casing hole detection seat, the lower cylindrical section of the inner casing Kong Tan plug is tightly sealed with the inner culvert pneumatic flow path through small clearance fit between the inner casing hole detection seat and the inner casing shell hole detection hole.
When the engine hole is detected, the outer casing Kong Tan plug assembly is detached by adopting a general tool, then the special tool passes through the hole detection opening on the outer casing shell and is screwed on the internal thread of the inner casing hole detection plug, and after the compression spring rotates for 90 degrees, the inner casing Kong Tan plug is taken out from the blind cavity and the limit groove of the inner casing hole detection seat, so that the hole detection device is decomposed. And after the hole detection is finished, the steps are reversely operated, and an inner casing hole detection plug and an outer casing Kong Tan plug assembly are respectively installed on an inner casing hole detection seat and an outer casing hole detection seat to finish the reinstallation of the hole detection device.
The technical disadvantages of the prior art scheme are as follows:
1. the inner and outer casing hole plug probes are required to be disassembled and assembled by different tools, so that the types of random tools are increased, and the requirements on engine guarantee tools are high.
2. The inner casing hole plug is required to be disassembled and assembled blindly, the disassembly and assembly difficulty is high, the risk of falling parts exists in the disassembly and assembly process, and the requirement on the skill of hole detection inspectors is high.
3. Scattered parts used in the assembly and disassembly processes of the hole detection plug are respectively completed by two steps of operation, so that the daily maintenance man-hour of the engine is increased.
Disclosure of Invention
In order to solve the above-mentioned problem, the present application provides a hole detection device for an aeroengine double-layer casing, comprising:
the outer casing Kong Tan plug assembly is arranged on the outer casing hole detection seat;
an inner casing Kong Tan blocking rod mounted on the inner casing hole detection seat;
the outer casing Kong Tan plug assembly is provided with a sleeve, the inner casing hole plugging rod is provided with an inner casing plugging rod boss formed by radial protrusions, and the inner casing plugging rod boss is sleeved in the sleeve with a gap;
the tail end of the part of the inner casing hole plug rod exposed out of the sleeve is provided with a ball head structure; the sleeve has a spring thereon that holds the ball structure against the inner housing Kong Tan bore probe exit.
Preferably, the outer casing Kong Tan plug assembly comprises an outer casing hole plug seat, a ball, a plug cover and a first spring;
the middle part of the outer casing hole plug seat is protruded to divide the outer casing hole plug seat into a plug head part and an exposed part, the plug head part is provided with a radial channel, the plug head part is covered by a plug cover, the plug cover is provided with a limiting hole with the diameter smaller than that of the channel, a first spring is arranged in the channel and keeps the ball part exposed out of the limiting hole of the plug cover, the ball exposed out of the plug cover is clamped on the wall surface of the outer casing Kong Tan, the inner casing hole plug seat is arranged on the inner casing through a flange edge, the inner casing hole plug seat is provided with a hole probe hole, and the orifice of Kong Tankong is provided with a sealing conical surface which is matched and overlapped with the ball structure.
Preferably, the tail end of the ball head structure is provided with a cylindrical section extending into a hole exploring hole of the inner casing hole exploring seat, and the outer surface of the cylindrical section is provided with a metal brush wire for sealing.
Preferably, the diameter of the cylindrical section is smaller than the diameter of the hole exploratory hole of the inner casing hole exploratory seat.
Preferably, the end of the inner wall of the sleeve is provided with an annular groove, and an elastic retainer ring for limiting the blocking rod of the inner casing Kong Tan from falling out of the sleeve is arranged in the annular groove.
Preferably, the side surface of the inner casing blocking rod boss is a cylindrical surface or a spherical surface, so that the ball head structure has axial, radial and circumferential freedom of movement.
Preferably, one end of the spring is propped against the end face of the inner casing blocking rod boss, the other end of the spring is propped against the bottom face of the sleeve, and the spring is in a compressed state.
The upper part of the inner casing blocking rod boss is provided with a guide rod for guiding the spring to compress along the compression path.
The advantages of the present application include:
1. the hole detection device is a double-layer casing hole detection opening plugging integrated structure, solves the problem that the current hole detection plug needs to be disassembled and assembled in two steps by adopting a special tool, and achieves synchronous disassembly and assembly of the inner culvert plug and the outer culvert plug by adopting a universal tool, and has the advantages of simple structure and convenience in operation.
2. The hole detection device has the advantages that the guide structures are arranged in all assembly links, the structure is stable after the hole detection device is assembled in place, the problem that the existing hole detection plug is difficult to blind disassembly and blind assembly operation is effectively avoided, and the technical level requirements on maintenance personnel are reduced.
3. The hole detection device only needs to operate the next whole assembly in the dismounting process, parts are few, all parts of the assembly are in a detachable matching assembly scheme, and after the individual parts are worn after working for a long time, local replacement and repair can be realized.
4. The hole detection device adopts a ball cone sealing line and a flexible contact sealing mode for high-temperature high-pressure gas in the inner duct, reduces gas leakage compared with the small-clearance sealing mode of the existing hole detection plug, is beneficial to protecting outer duct components and improves the overall performance of the engine.
Drawings
FIG. 1 is a schematic diagram of a hole detection device for a double-layer casing of an aircraft engine according to a preferred embodiment of the present application;
FIG. 2 is a semi-sectional view of an outer casing Kong Tan plug assembly according to a preferred embodiment of the present application;
FIG. 3 is a semi-sectional view of an outer casing bore plug head mount according to a preferred embodiment of the present application;
FIG. 4 is a schematic view of the blocking rod of the inner casing Kong Tan in accordance with a preferred embodiment of the present invention;
FIG. 5 is a schematic view of an inner casing hole probe according to a preferred embodiment of the present application;
FIG. 6 is a schematic view of a circlip for holes according to a preferred embodiment of the present application;
FIG. 7 is a schematic perspective view of a circlip for holes according to a preferred embodiment of the present application;
FIG. 8 is a perspective view of an inner casing hole probe according to a preferred embodiment of the present application;
FIG. 9 is a construction disassembly view of a double-layer casing hole detection device according to a preferred embodiment of the present invention;
fig. 10 is a perspective view of an outer casing Kong Tan plug assembly in accordance with a preferred embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present application and the advantages thereof more apparent, the technical solution of the present application will be more fully described in detail below with reference to the accompanying drawings, it being understood that the specific embodiments described herein are only some of the embodiments of the present application, which are for explanation of the present application, not for limitation of the present application. It should be noted that, for convenience of description, only the portion relevant to the present application is shown in the drawings, and other relevant portions may refer to a general design, and without conflict, the embodiments and technical features in the embodiments may be combined with each other to obtain new embodiments.
Furthermore, unless defined otherwise, technical or scientific terms used in the description of this application should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," "outer," and the like as used in this description are merely used to indicate relative directions or positional relationships, and do not imply that a device or element must have a particular orientation, be configured and operated in a particular orientation, and that the relative positional relationships may be changed when the absolute position of the object being described is changed, and thus should not be construed as limiting the present application. The terms "first," "second," "third," and the like, as used in the description herein, are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance to the various components. The use of the terms "a," "an," or "the" and similar referents in the description of the invention are not to be construed as limited in number to the precise location of at least one. As used in this description, the terms "comprises," "comprising," or the like are intended to cover an element or article that appears before the term and that is listed after the term and its equivalents, without excluding other elements or articles.
Furthermore, unless specifically stated and limited otherwise, the terms "mounted," "connected," and the like in the description herein are to be construed broadly and refer to either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements, and the specific meaning of the two elements can be understood by a person skilled in the art according to specific situations.
In order to solve the problems, the application provides a hole detection device for a double-layer casing of an aeroengine, which can realize high-efficiency sealing of high-temperature and high-pressure gas in an internal channel and synchronously complete the disassembly, assembly and maintenance work of hole detection plugs of an inner casing and an outer casing;
the double-layer casing includes: the outer casing shell 3 and the inner casing shell 7, the outer casing hole detection seat 2 is arranged on the outer casing shell 3 through bolts 4, and the inner casing hole detection seat 6 is arranged on the inner casing shell 7;
as shown in fig. 1 to 5 and 8 to 10, the hole detection device includes:
the outer casing Kong Tan plug assembly 1 is arranged on the outer casing hole detection seat 2;
an inner casing hole detection blocking rod 5 arranged on the inner casing hole detection seat 6;
the outer casing Kong Tan plug assembly 1 comprises an outer casing hole plug seat 11, balls 12, a plug cover 13 and a first spring 14;
the middle part of the outer casing hole plug seat 11 is protruded to divide the outer casing hole plug seat 11 into a plug head part and an exposed part, the plug head part is provided with a radial channel, the plug cover 13 is coated on the plug head part, the plug cover 13 is provided with a limiting hole with the diameter smaller than that of the channel, the first spring 14 is arranged in the channel and keeps the ball 12 to be partially exposed out of the limiting hole of the plug cover 13, and the ball 12 exposed out of the plug cover 13 is clamped on the wall surface of the outer casing hole plug seat 2.
An outer duct is formed between the outer casing 3 and the inner casing 7, an outer casing hole plug seat 11 needs to extend into the outer duct and is provided with a sleeve 15, and an annular groove 16 is arranged near the end part of the lower end and is used for installing and limiting the circlip 9 for the hole, as shown in fig. 6 to 7;
an inner casing blocking rod boss 18 is arranged at the upper end of the inner casing hole blocking rod 5, and the upper surface of the inner casing blocking rod boss 18 is matched with the bottom surface of the sleeve 15 to compress the spring 8, so that the compression force of the inner casing hole blocking rod 5 in the working state is ensured. When the lower surface of the inner casing plugging rod boss 18 is attached to the upper surface of the hole elastic retainer ring 9, the hole detection device reaches the longest state, the inner casing hole plugging rod 5 is blocked by the hole elastic retainer ring 9 and cannot be separated, and a section of guide rod is arranged on the upper portion of the inner casing plugging rod boss 18 and used for guiding the compression path of the spring 8. When the engine works, the outer diameter d of the boss of the blocking rod of the inner casing 0 Diameter D of sleeve with outer casing Kong Tan plug seat 0 The gap between the two parts compensates the axial and circumferential relative displacement between the hole detection openings on the outer casing 3 and the inner casing 7;
the lower end of the inner casing hole detection blocking rod 5 is provided with a ball head structure 19, and when the inner casing hole detection blocking rod is assembled in place, the spherical surface of the ball head structure 19 is in compression fit with the sealing conical surface 21 of the inner casing hole detection seat 6 to form a compression sealing line for high-temperature and high-pressure gas sealing. The matching design of the spherical radius and the sealing cone angle theta realizes the adjustment design of the sealing line position at the position. The metal brush wire 17 at the lower part of the ball head has certain flexibility, and forms a contact sealing structure after being inserted into the hole probing hole 20 of the inner casing hole probing seat 6. When the ball head of the inner casing hole plug rod 5 rotates to compensate the axial deformation and the circumferential deformation, the metal brush wires 17 follow up to generate slight compression or deformation release. In order to reduce the weight of the structure, a lightening hole can be designed on the metal brush head part.
The circlip 9 for hole has certain elasticity and inner diameter D 1 Is matched with an inner casing hole plug rod 5 with the outer diameter d 1 Is matched with the annular groove 16 of the outer casing hole plug head seat 11. To improve the blocking effect, the inner diameter D 1 And an outer diameter d 1 An eccentric distance delta is arranged between circle centers. The tool hole 22 is used for nondestructive dismounting of the inner casing hole plug rod 5, and can be dismounted and replaced in time when any part of the outer casing hole plug head seat 11, the inner casing hole plug rod or the hole elastic retainer ring 9 is worn.
The hole detection device for the double-layer casing of the aero-engine has the working principle that:
the novel double-layer casing hole detection device adopts an inner casing hole detection plug and outer casing hole detection plug integrated structural scheme, when an engine is in a working state, the device can not only adapt to the axial, radial and circumferential thermal deformation compensation requirements of the inner casing and the outer casing, but also has a double sealing function on inner channel gas.
The spring compression guide section is arranged at one end of the inner casing hole detection blocking rod 5, inserted into the spring, and when the radial relative displacement is generated between the outer casing shell 3 and the hole detection opening on the inner casing shell 7, the radial compensation connection is realized by compressing or releasing the deformation of the spring. When the hole detection ports on the outer casing shell 3 and the inner casing shell 7 generate axial and circumferential relative displacement, axial and circumferential compensation connection is realized through the movable clearance between the outer casing Kong Tan plug assembly 1 and the inner casing hole detection blocking rod 5 and the ball head rotation of the inner casing hole detection blocking rod 5.
The double sealing function of the inner channel gas is realized by the cooperation of the inner casing hole detection blocking rod 5 and the inner casing hole detection seat 6. The first sealing structure is formed by flexible contact between the metal brush wires at the head of the inner casing hole detection blocking rod 5 and the inner casing hole detection seat 6, and is used as an auxiliary sealing structure of inner casing hole detection gas; the second sealing structure is formed by sealing the spherical surface of the inner casing hole detection blocking rod 5 and the sealing conical surface 21 line of the inner casing hole detection seat 6, and is a main sealing structure of inner casing hole detection gas.
When the engine hole is detected, synchronous disassembly and assembly of the inner casing hole detection blocking rod 5 can be realized by only screwing the hexagonal boss above the outer casing Kong Tan plug assembly 1.
And (3) assembling and disassembling:
(1) Device disassembly
And unscrewing the hexagonal boss on the upper part of the hole detection device by adopting a universal tool, withdrawing the threaded section of the plug seat for detecting the outer casing hole, and pulling out the plug rod from the inner casing hole detection seat along the vertical line direction of the opening of the hole detection hole until the device completely withdraws from the outer casing hole detection seat, thereby completing the disassembly work of the device.
(2) Device mounting
The device penetrates through the outer casing hole detection seat and stretches into the inner casing hole detection seat, the outer casing hole detection plug seat is screwed down manually, and then the hole detection device is screwed down to a specified state by using a universal tool, so that the installation work of the device can be completed.
1. The hole detection device is a double-layer casing hole detection opening blocking integrated structure, solves the problem that the current hole detection plug needs to be disassembled and assembled in two steps by adopting a special tool, and realizes the synchronous disassembly and assembly of the inner and outer culvert plugs by adopting a universal tool, and has the advantages of simple structure and convenient operation.
2. The hole detection device has the advantages that the guide structures are arranged in all assembly links, the structure is stable after the hole detection device is assembled in place, the problem that the existing hole detection plug is difficult to blind disassembly and blind assembly operation is effectively avoided, and the technical level requirements on maintenance personnel are reduced.
3. The hole detection device only needs to operate the next whole assembly in the dismounting process, parts are few, all parts of the assembly are in a detachable matching assembly scheme, and after the individual parts are worn after working for a long time, local replacement and repair can be realized.
4. The hole detection device adopts a ball cone sealing line and a flexible contact sealing mode for high-temperature high-pressure gas in the inner duct, reduces gas leakage compared with the small-clearance sealing mode of the existing hole detection plug, is beneficial to protecting outer duct components and improves the overall performance of the engine.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (6)
1. A hole detection device for an aeroengine double-layer casing, comprising:
the outer casing Kong Tan plug assembly (1) is arranged on the outer casing hole detection seat (2);
an inner casing Kong Tan blocking rod (5) arranged on the inner casing hole detection seat (6);
the outer casing Kong Tan plug assembly (1) is provided with a sleeve (15), the inner casing Kong Tan plug rod (5) is provided with an inner casing plug rod boss (18) formed by radial protrusions, and the inner casing plug rod boss (18) is sleeved in the sleeve (15) with a gap;
the end of the part of the inner casing Kong Tan, which is exposed out of the sleeve (15), is provided with a ball head structure; the sleeve (15) is provided with a spring (8) for keeping the ball head structure at the outlet of Kong Tankong (20) of the inner casing hole probe seat (6);
the outer casing Kong Tan plug assembly (1) comprises an outer casing hole plug seat (11), balls (12), a plug cover (13) and a first spring (14);
the middle part of the outer casing hole plug seat (11) is protruded to divide the outer casing hole plug seat (11) into a plug head part and an exposed part, the plug head part is provided with a radial channel, a plug cover (13) is coated on the plug head part, the plug cover (13) is provided with a limit hole with the diameter smaller than that of the channel, a first spring (14) is arranged in the channel and keeps the ball (12) to be partially exposed out of the limit hole of the plug cover (13), and the ball (12) exposed out of the plug cover (13) is clamped on the wall surface of the outer casing hole plug seat (2);
the inner casing hole detection seat (6) is arranged on the inner casing through a flange edge, and the orifice of the Kong Tankong (20) is provided with a sealing conical surface (21) which is matched and lapped with the ball head structure;
the end of the ball head structure is provided with a cylindrical section extending into the hole exploratory hole (20), and the outer surface of the cylindrical section is provided with a metal brush wire (17) for sealing.
2. The hole detection device for an aircraft engine double-layer casing according to claim 1, wherein the diameter of the cylindrical section is smaller than the diameter of Kong Tankong (20).
3. Hole detection device for double-deck casing of aeroengine according to claim 1, characterized in that the inner wall end of the sleeve (15) has an annular groove (16), in which annular groove (16) a circlip (9) for hole is mounted for limiting the removal of the blocking rod (5) of the inner casing Kong Tan from the sleeve (15).
4. Hole detection device for an aeroengine double-layer casing according to claim 1, characterized in that the inner casing plug boss (18) is cylindrical or spherical 19 on its side.
5. Hole detection device for an aeroengine double-layer casing according to claim 1, wherein one end of the spring (8) abuts against the end face of the inner casing blocking rod boss (18) and the other end abuts against the bottom face of the sleeve (15), and the spring (8) is in a compressed state.
6. Hole detection device for an aeroengine double casing according to claim 1, characterized in that the upper part of the boss (18) is provided with a guide rod for guiding the compression of the spring (8) along the compression path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311439366.4A CN117147164B (en) | 2023-11-01 | 2023-11-01 | Hole detection device for double-layer casing of aero-engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311439366.4A CN117147164B (en) | 2023-11-01 | 2023-11-01 | Hole detection device for double-layer casing of aero-engine |
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| Publication Number | Publication Date |
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| CN117147164A CN117147164A (en) | 2023-12-01 |
| CN117147164B true CN117147164B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311439366.4A Active CN117147164B (en) | 2023-11-01 | 2023-11-01 | Hole detection device for double-layer casing of aero-engine |
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| CN (1) | CN117147164B (en) |
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| CN117147164A (en) | 2023-12-01 |
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