A quick switching tooling for gas turbine combustor spray painting

Abstract

The application relates to the technical field of spraying fixtures, in particular to a quick switching tool for spraying a gas turbine combustion chamber, which comprises a clamping unit and a transmission shaft, and the outer side of the clamping unit is further provided with a fixing unit which is quickly connected with the transmission shaft; the fixing unit comprises a connecting seat, an anti-fumble assembly, a locking piece and a bearing plate, wherein the anti-fumble piece is arranged between the bearing plate and the locking piece, the inside of the connecting seat is hollow, the bearing plate is slidingly arranged in the inside of the connecting seat and is used for abutting when the transmission shaft is installed, and a plurality of annular equidistantly-distributed positioning shafts are arranged on the top side of the bearing plate and are inserted with the transmission shaft. The quick switching tool for spraying the gas turbine combustion chamber, the corresponding plug-in structure of the anti-fumble block and the anti-fumble seat ensures that the transmission shaft can only be installed at a unique correct angle and position, and effectively prevents equipment damage or spraying quality accidents caused by incorrect installation direction.

Description

Technical Field

[0001] This application relates to the field of spraying fixture technology, and in particular to a quick-change tooling for spraying gas turbine combustion chambers. Background Technology

[0002] Gas turbines are among the most efficient thermal engines available today. Their combustion chamber components operate in environments exceeding 1400°C, far exceeding the safe operating temperature of the base alloy. Therefore, thermal barrier coatings must be applied to the surfaces of these components to provide effective thermal insulation. These coatings are typically prepared using plasma spraying or supersonic flame spraying techniques. During the spraying process, the workpiece must rotate at a constant speed with the rotary table to ensure the coating thickness and uniformity. A search revealed a patent document with publication number CN118341597A, which discloses a fixture for spraying transparent calm turbine blades. While this application achieves a quick clamping function, its installation and positioning lacks an axial reference, relying solely on manual fitting by the operator. This not only makes it difficult to guarantee coaxiality but also easily leads to false locking due to asynchronous strokes of the clamping components, resulting in severe vibrations during rotation. Furthermore, existing quick-connect structures generally lack foolproof design, allowing operators to insert the rotating shaft in the wrong direction or angle. There is also no sequential constraint between locking and positioning actions, easily leading to logical errors such as "locking first, then positioning." More critically, existing fixtures lack effective status detection and visual identification methods after locking, making it impossible for operators to visually determine whether the locking is in place, posing significant quality risks. Therefore, this paper proposes a quick-change fixture for spraying gas turbine combustion chambers to address these problems. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this application provides a rapid switching tooling for gas turbine combustor spraying that enables fast and precise positioning and locking, and features foolproof guidance, sequence control, and status detection functions, thus solving the aforementioned problems.

[0004] This application provides a quick-change tooling for spraying gas turbine combustion chambers, employing the following technical solution: A quick-change tooling for spraying gas turbine combustors includes a clamping unit and a drive shaft, and a fixing unit that is quick-connected to the drive shaft is also provided on the outside of the clamping unit. The fixing unit includes a connecting seat, a foolproof component, a locking component, and a support plate. A foolproof component is provided between the support plate and the locking component. The connecting seat is hollow, and the support plate is slidably disposed inside the connecting seat for abutment during drive shaft installation. Several annularly distributed positioning shafts are mounted on the top side of the support plate, and these positioning shafts are inserted into the drive shaft. A buffer spring is mounted on the other side of the support plate, and a limiting rod that engages with the locking component is also provided on the support plate. The foolproof component guides the drive shaft to prevent it from being misaligned, and then the positioning shafts provide positioning. During installation, the support plate is displaced. As the support plate displaces, the foolproof component and the limiting rod release the locking component's foolproof limitation, ensuring that the positioning shaft can be installed and fixed in an orderly manner.

[0005] Optional: The anti-mistake assembly includes anti-mistake blocks, anti-mistake plates, and anti-mistake seats, wherein there are three anti-mistake blocks and three anti-mistake seats. The three anti-mistake blocks are fixed equidistantly in a ring on the outer surface of the drive shaft, and the three anti-mistake seats are fixed equidistantly in a ring on the top side of the anti-mistake plate. During installation, the three anti-mistake blocks are installed corresponding to the three anti-mistake seats respectively, so as to facilitate the locking and fixing of the subsequent locking components.

[0006] Optionally: The locking component is used to lock and fix the drive shaft. The locking component includes a fastening block that is slidably installed on the top side of the anti-fool plate and a locking sleeve that is sleeved on the outer surface of the connecting seat. Both the anti-fool plate and the anti-fool block have locking grooves inside, and the fastening block is inserted into the locking groove.

[0007] Optionally: The fastening block is threaded with an abutment, the locking sleeve is hollow inside, and its inner side is provided with a guide slope that abuts and cooperates with the abutment. The guide slope is conical in shape. When the bearing plate moves down, the anti-fooling component and the limiting rod respectively release the anti-fooling limit on the locking sleeve and the fastening block, so that the fastening block can be driven to move by the displacement locking sleeve to achieve the positioning of the transmission shaft.

[0008] Optionally, a detection element is also provided on the outside of the fastening block for detecting the state of the fastening block after it enters the locking groove. The detection element consists of a return spring three and a pressure sensing block. One side of the return spring three is fixed to the fastening block, and the other side is fixed to the outside of the pressure sensing block. There are two detection elements, which can detect the locking groove inside the foolproof block.

[0009] Optionally: Two symmetrically distributed return springs are fixed on the outer side of the fastening block, and the number of fastening blocks is three. The positions of the three fastening blocks correspond to the three anti-fooling seats. The fastening blocks have locking holes inside that cooperate with the positioning of the limiting rod.

[0010] Optionally, the foolproof block is provided with an marking component, which consists of a marking rod and a second return spring. The marking rod slides through the inside of the foolproof block, and the second return spring is wound around and installed on the outer surface of the top of the marking rod. When the foolproof block is connected to the foolproof seat, the bottom end of the marking rod abuts against the inner wall of the foolproof seat, and then the marking rod moves upward to mark.

[0011] Optionally: The anti-mistake component includes a carriage and an anti-mistake rod, the anti-mistake rod is threaded onto one side of the carriage, the carriage is bolted to the bottom side of the support plate, the carriage extends to the outside of the connecting seat, and the anti-mistake rod is located on the outside of the locking sleeve.

[0012] Optionally: the connecting seat has a sliding opening inside that communicates with the outside, the slide bracket passes through the sliding opening and is slidably connected to the sliding opening, the locking sleeve has a foolproof hole inside that cooperates with the foolproof rod; there are multiple foolproof components, and a sealing cover is detachably installed on the top side of the locking sleeve.

[0013] Optionally, the clamping unit includes a base plate and an isolation frame fixed to the top side of the base plate. The isolation frame has multiple fixing holes for quick switching. The connecting seat is bolted to the side of the base plate away from the isolation frame.

[0014] In summary, this application includes at least one of the following beneficial technical effects: 1. The present invention provides a corresponding insertion structure between the anti-foolproof block and the anti-foolproof seat, which ensures that the drive shaft can only be installed in the one correct angle and orientation, effectively preventing equipment damage or spraying quality accidents caused by incorrect installation direction.

[0015] 2. In this invention, the displacement of the bearing plate serves as a trigger signal to sequentially release the limiting effect of the anti-fooling component and the limiting rod, ensuring that the locking component can only operate after the positioning shaft has completed precise positioning, thus forming an orderly installation logic of positioning first and then locking.

[0016] 3. This invention, by setting a buffer spring at the bottom of the bearing plate, achieves elastic buffering during the assembly process of the drive shaft, avoiding impact wear and workpiece deformation caused by rigid assembly, while reducing assembly losses of various locking and positioning structures. Combined with the sealing protection of the sealing cover, it effectively prevents spray dust and oil from entering the tooling, avoiding structural jamming and corrosion, significantly extending the tooling's service life and reducing equipment maintenance costs.

[0017] 4. This invention enables visualized judgment of assembly completion through the displacement of the marker rod, which is suitable for rapid manual self-inspection. On the other hand, the pressure sensor block monitors the locking status in real time, which can accurately identify abnormal working conditions such as false locking, under-locking, and over-locking, and promptly warn of assembly failures. This avoids safety hazards such as spraying deviation, workpiece falling off, and equipment collision caused by clamping failure, thereby improving the stability and safety of spraying processing. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural view of this application; Figure 2 This is a schematic diagram of the structure of the fixed unit in this application; Figure 3 This is a schematic diagram of the bottom structure of the fixing unit in this application; Figure 4 This is a cross-sectional view of the fixed unit structure of this application; Figure 5 This is a structural cross-sectional view of the fixed unit in this application from another perspective; Figure 6 This application Figure 5 A magnified structural diagram of structure A is shown.

[0019] Explanation of reference numerals in the attached figures: 1. Clamping unit; 11. Base plate; 12. Isolation frame; 13. Fixing hole; 2. Fixing unit; 21. Connecting seat; 22. Anti-foolproof block; 23. Anti-foolproof plate; 231. Anti-foolproof seat; 24. Fastening block; 241. Abutment joint; 25. Locking sleeve; 251. Guide slope; 252. Sealing cover; 26. Bearing plate; 261. Positioning shaft; 27. Buffer spring; 28. Anti-foolproof component; 281. Slide carriage; 282. Slide opening; 283. Anti-foolproof rod; 284. Anti-foolproof hole; 29. ​​Return spring one; 210. Identifying rod; 211. Return spring two; 212. Limiting rod; 213. Locking hole; 214. Locking groove; 215. Return spring three; 216. Pressure sensor block; 3. Drive shaft. Detailed Implementation

[0020] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0021] Example 1 like Figures 1-3As shown, a quick-change fixture for spraying gas turbine combustors includes a clamping unit 1 and a drive shaft 3. A fixing unit 2, which is quickly connected to the drive shaft 3, is also provided on the outside of the clamping unit 1. The clamping unit 1 includes a base plate 11 and an isolation frame 12 fixed to the top side of the base plate 11. The isolation frame 12 has multiple fixing holes 13 for quick switching. The fixing holes 13 are threaded holes or through holes, used to install blade clamping accessories or auxiliary positioning parts of different models, enabling quick replacement and adaptation of combustor components of different specifications. A connecting seat 21 is bolted to the side of the base plate 11 away from the isolation frame 12.

[0022] As a further preferred embodiment, the isolation frame 12 has a rectangular frame structure or a circular frame structure, and its inner sidewall is provided with a flexible protective pad to avoid rigid contact with combustion chamber components and damage. like Figures 3-6 As shown, the fixing unit 2 includes a connecting seat 21, a foolproof component, a locking component, and a bearing plate 26. A foolproof component 28 is provided between the bearing plate 26 and the locking component. The connecting seat 21 is hollow inside. The bearing plate 26 is slidably disposed inside the connecting seat 21 for abutment during the installation of the drive shaft 3. Several annularly distributed positioning shafts 261 are installed on the top side of the bearing plate 26. The positioning shafts 261 are inserted into the drive shaft 3. A buffer spring 27 is installed on the other side of the bearing plate 26. A limiting rod 212 that is inserted into the locking component is also provided on the bearing plate 26. like Figure 3 and Figure 4 As shown, the error prevention assembly includes error prevention block 22, error prevention plate 23 and error prevention seat 231. There are three error prevention blocks 22 and three error prevention seats 231. The three error prevention blocks 22 are fixed in a ring at equal intervals on the outer surface of the drive shaft 3, and the three error prevention seats 231 are fixed in a ring at equal intervals on the top side of the error prevention plate 23. like Figures 4-6 As shown, the locking component includes a fastening block 24 slidably mounted on the top side of the anti-fool plate 23 and a locking sleeve 25 sleeved on the outer surface of the connecting seat 21; both the anti-fool plate 231 and the anti-fool block 22 have locking grooves 214 inside, and the fastening block 24 is inserted into the locking grooves 214; the fastening block 24 has an abutment 241 threaded on the outer side; the locking sleeve 25 is hollow inside, and its inner side has a guide slope 251 that abuts against the abutment 241, and the guide slope 251 is conical in shape.

[0023] The drive shaft 3 is guided by the anti-foolproof component and then positioned by the positioning shaft 261. During installation, the bearing plate 26 is moved. When the bearing plate 26 is moved, the anti-foolproof limit of the locking component is released by the anti-foolproof component 28 and the limit rod 212 respectively, so as to ensure that the positioning shaft 261 can be installed and fixed in an orderly manner.

[0024] Example 2 The difference between this embodiment and Embodiment 1 is that: Figure 5 and Figure 6 As shown, a detection element is also provided on the outer side of the fastening block 24 to detect the state of the fastening block 24 after it enters the locking groove 214. Specifically, the detection element consists of a return spring 215 and a pressure sensor block 216. One side of the return spring 215 is fixed to the fastening block 24, and the other side is fixed to the outer side of the pressure sensor block 216. There are two detection elements, which are respectively set on opposite sides of the fastening block 24, and can detect the locking grooves 214 on opposite sides inside the anti-fooling block 22. When the fastening block 24 is inserted into the locking groove 214, the pressure sensor block 216 abuts against the inner wall of the locking groove 214, the return spring 215 is compressed and deformed, and the pressure sensor block 216 outputs a corresponding pressure signal to indicate the locking state.

[0025] As a further preferred embodiment, the pressure sensing block 216 is a thin-film pressure sensor or a piezoelectric pressure sensor, and its signal output terminal is electrically connected to an external control system to realize real-time monitoring and alarm of the locking state.

[0026] Example 3 The difference between this embodiment and Embodiment 1 or 2 is that: Figure 5 and Figure 6 As shown, two symmetrically distributed return springs 29 are fixed to the outer side of the fastening block 24. There are three fastening blocks 24, and their positions correspond to the three anti-fooling seats 231. The fastening block 24 has a locking hole 213 inside that cooperates with the positioning rod 212. Specifically, one end of the return spring 29 is fixedly connected to the outer wall of the fastening block 24, and the other end is fixedly connected to the inner wall of the anti-fooling plate 23 or the connecting seat 21. When the locking sleeve 25 rotates in the reverse direction, the return spring 29 provides an elastic restoring force, causing the fastening block 24 to slide outward automatically and disengage from the locking groove 214.

[0027] As a further preferred embodiment, the inner end face of the fastening block 24 is provided with anti-slip teeth or friction pads to increase the friction between it and the inner wall of the locking groove 214 and enhance the anti-loosening performance after locking.

[0028] Example 4 The difference between this embodiment and any one of embodiments 1-3 is that: Figure 5As shown, the foolproof block 22 has an internal marking component, which consists of a marking rod 210 and a second return spring 211. Specifically, the marking rod 210 slides through the inside of the foolproof block 22, with its top end extending to the outside of the upper end face of the foolproof block 22 and its bottom end extending into the inside of the lower end face of the foolproof block 22. The second return spring 211 is wound around the outer surface of the top end of the marking rod 210, with one end abutting against the top limiting part of the marking rod 210 and the other end abutting against the upper end face of the foolproof block 22. When the foolproof block 22 is correctly connected to the foolproof seat 231, the bottom end of the marking rod 210 abuts against the bottom surface of the inner wall of the foolproof seat 231, and then the marking rod 210 overcomes the elastic force of the second return spring 211 and slides upward to extend out of the upper end face of the foolproof block 22, forming a visible marking signal. When the foolproof block 22 is not correctly connected to the foolproof seat 231, the marking rod 210 remains in a retracted state under the action of the second return spring 211.

[0029] As a further preferred embodiment, the top of the marker rod 210 is provided with a color marking layer or a reflective marking layer, which makes it easy for operators to quickly judge the connection status visually.

[0030] Example 5 The difference between this embodiment and any one of embodiments 1-4 is that: Figure 4 and Figure 6 As shown, the anti-misalignment component 28 includes a slide 281 and an anti-misalignment rod 283. The anti-misalignment rod 283 is threaded onto one side of the slide 281, and the slide 281 is bolted to the bottom side of the support plate 26. It should be noted that the connecting seat 21 has a sliding opening 282 that communicates with the outside. The slide 281 passes through the sliding opening 282 and is slidably connected to the sliding opening 282. The locking sleeve 25 has an anti-misalignment hole 284 that engages with the anti-misalignment rod 283. Specifically, in the initial state, the anti-misalignment rod 283 is inserted into the anti-misalignment hole 284, restricting the rotational movement of the locking sleeve 25 relative to the connecting seat 21. When the support plate 26 is displaced downward due to the insertion of the drive shaft 3, the slide 281 slides synchronously along the sliding opening 282, causing the anti-misalignment rod 283 to disengage from the anti-misalignment hole 284, thus releasing the rotational restriction on the locking sleeve 25.

[0031] As a further preferred embodiment, there are multiple anti-mistake components 28, which are equidistantly distributed along the circumference of the support plate 26, and the number of corresponding anti-mistake holes 284 is the same as the number of anti-mistake components 28 and their positions correspond one-to-one.

[0032] Example 6 The difference between this embodiment and any one of embodiments 1-5 is that: Figure 4As shown, a sealing cover 252 is detachably installed on the top side of the locking sleeve 25. The sealing cover 252 has an annular cover structure, and its inner diameter is adapted to the outer diameter of the connecting seat 21. The sealing cover 252 is fastened to the top opening of the locking sleeve 25 by a snap-fit ​​connection. A sealing gasket is provided between the sealing cover 252 and the locking sleeve 25 to prevent dust or paint particles during the spraying process from entering the interior of the locking sleeve 25, thus avoiding affecting the fitting accuracy of the guide slope 251 and the abutment 241.

[0033] As a further preferred embodiment, the sealing cover 252 has a through hole at its center for the drive shaft 3 to pass through. The inner wall of the through hole is fitted with a dustproof brush or an elastic sealing lip to achieve dynamic sealing while ensuring the free rotation of the drive shaft 3.

[0034] Combined with appendix Figures 1-6 The working principle of the above embodiments is as follows: In the initial state, the bearing plate 26 is located in the predetermined position inside the connecting seat 21 under the elastic support of the buffer spring 27. At this time, the anti-fooling component 28 forms a limiting interference on the locking sleeve 25, and the limiting rod 212 is inserted into the locking hole 213 of the fastening block 24, so that the fastening block 24 is kept in the retracted state, which facilitates the unobstructed insertion of the transmission shaft 3. During installation, the operator inserts the drive shaft 3 into the hollow interior of the connecting seat 21. During this process, the end of the drive shaft 3 first abuts against the positioning shaft 261 on the top side of the bearing plate 26. The positioning shaft 261 is inserted into the corresponding positioning hole at the end of the drive shaft 3, achieving preliminary circumferential positioning and coaxial guidance. At the same time, the anti-foolproof block 22 on the outer surface of the drive shaft 3 and the anti-foolproof seat 231 on the top side of the anti-foolproof plate 23 form a one-to-one plug-in fit, ensuring that the drive shaft 3 can only be installed at the correct angle and orientation, thus playing a foolproof guiding role. As the drive shaft 3 continues to be inserted, its end pushes the bearing plate 26 to slide downward or inward against the elastic force of the buffer spring 27; the displacement of the bearing plate 26 causes the anti-fooling component 28 to move synchronously; the anti-fooling rod 283 disengages from the anti-fooling hole 284 of the locking sleeve 25, releasing the rotational limitation on the locking sleeve 25; at the same time, the limiting rod 212 exits from the locking hole 213 of the fastening block 24, releasing the radial limitation on the fastening block 24; At this point, the operator can move the locking sleeve 25. The conical guide slope 251 on the inner side of the locking sleeve 25 abuts against the abutment 241 on the outer side of the fastening block 24. As the locking sleeve 25 is screwed in, the guide slope 251 pushes the three fastening blocks 24 to move radially inward in sync. The inner end of the fastening block 24 is inserted into the locking groove 214 opened inside the anti-fool block 22 and the anti-fool seat 231, locking the drive shaft 3 and the fixing unit 2 into one piece. Thus, the quick connection between the drive shaft 3 and the clamping unit 1 is completed. During disassembly, the locking sleeve 25 is moved in the reverse direction. The fastening block 24 automatically resets outward and disengages from the locking groove 214 under the elastic action of the return spring 29. The bearing plate 26 resets under the elastic force of the buffer spring 27, which drives the anti-fooling component 28 and the limit rod 212 to re-enter the limit state, and the drive shaft 3 can be easily pulled out.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A quick-change tooling for spraying gas turbine combustion chambers, comprising a clamping unit (1) and a drive shaft (3), characterized in that: The clamping unit (1) is also provided with a fixing unit (2) that is quickly connected to the drive shaft (3) on the outside. The fixing unit (2) includes a connecting seat (21), a foolproof component, a locking component, and a bearing plate (26). A foolproof component (28) is provided between the bearing plate (26) and the locking component. The connecting seat (21) is hollow inside. The bearing plate (26) is slidably disposed inside the connecting seat (21) for abutment during the installation of the drive shaft (3). Several annularly distributed positioning shafts (261) are installed on the top side of the bearing plate (26). The positioning shafts (261) are connected to the drive shaft (3). A buffer spring (27) is installed on the other side of the bearing plate (26), and a limiting rod (212) that is plugged into the bearing plate (26) is also provided on the bearing plate (26); the transmission shaft (3) is guided by the anti-foolproof component, and then positioned by the positioning shaft (261). During installation, the bearing plate (26) is moved. When the bearing plate (26) is moved, the anti-foolproof limit of the locking component is released by the anti-foolproof component (28) and the limiting rod (212) respectively, so as to ensure that the positioning shaft (261) can be installed and fixed in an orderly manner.

2. The quick-change tooling for spraying gas turbine combustion chambers according to claim 1, characterized in that: The anti-mistake assembly includes anti-mistake blocks (22), anti-mistake plates (23), and anti-mistake seats (231). There are three anti-mistake blocks (22) and three anti-mistake seats (231). The three anti-mistake blocks (22) are fixed equidistantly in a ring on the outer surface of the drive shaft (3), and the three anti-mistake seats (231) are fixed equidistantly in a ring on the top side of the anti-mistake plate (23). During installation, the three anti-mistake blocks (22) are installed correspondingly to the three anti-mistake seats (231) so that the locking parts can be locked and fixed later.

3. The quick-change tooling for spraying gas turbine combustion chambers according to claim 2, characterized in that: The locking component is used to lock and fix the drive shaft (3). The locking component includes a fastening block (24) that is slidably installed on the top side of the anti-fool plate (23) and a locking sleeve (25) that is sleeved on the outer surface of the connecting seat (21). The anti-fool plate (231) and the anti-fool block (22) are both provided with locking grooves (214), and the fastening block (24) is inserted into the locking groove (214).

4. The quick-change tooling for spraying gas turbine combustion chambers according to claim 3, characterized in that: The fastening block (24) has an abutment (241) threaded on its outer side. The locking sleeve (25) is hollow inside and has a guide slope (251) on its inner side that abuts against the abutment (241). The guide slope (251) is conical in shape. When the bearing plate (26) moves down, the anti-foolproof component (28) and the limiting rod (212) release the anti-foolproof limit on the locking sleeve (25) and the fastening block (24) respectively. The fastening block (24) can be driven to move by the displacement locking sleeve (25) to achieve the positioning of the transmission shaft (3).

5. A quick-change tooling for spraying gas turbine combustion chambers according to claim 3, characterized in that: The fastening block (24) is also provided with a detection element on its outer side for detecting the state of the fastening block (24) after it enters the locking groove (214). The detection element consists of a reset spring three (215) and a pressure sensing block (216). One side of the reset spring three (215) is fixed to the fastening block (24), and the other side is fixed to the outside of the pressure sensing block (216). There are two detection elements, which can detect the locking groove (214) inside the foolproof block (22).

6. A quick-change tooling for spraying gas turbine combustion chambers according to claim 3, characterized in that: Two symmetrically distributed return springs (29) are fixed on the outside of the fastening block (24). There are three fastening blocks (24). The positions of the three fastening blocks (24) are corresponding to the three anti-fooling seats (231). The fastening block (24) has a locking hole (213) inside that is positioned and cooperates with the limiting rod (212).

7. A quick-change tooling for spraying gas turbine combustion chambers according to claim 2, characterized in that: The foolproof block (22) is equipped with an marking component, which consists of a marking rod (210) and a second return spring (211). The marking rod (210) slides through the inside of the foolproof block (22), and the second return spring (211) is wound around and installed on the outer surface of the top of the marking rod (210). When the foolproof block (22) is connected to the foolproof seat (231), the bottom end of the marking rod (210) abuts against the inner wall of the foolproof seat (231), and then the marking rod (210) moves up to mark.

8. A quick-change tooling for spraying gas turbine combustion chambers according to claim 3, characterized in that: The foolproof component (28) includes a slide (281) and a foolproof rod (283). The foolproof rod (283) is threaded onto one side of the slide (281). The slide (281) is bolted to the bottom side of the support plate (26). The slide (281) extends to the outside of the connecting seat (21). The foolproof rod (283) is located outside the locking sleeve (25).

9. A quick-change tooling for spraying gas turbine combustion chambers according to claim 8, characterized in that: The connecting seat (21) has a sliding opening (282) that communicates with the outside. The slide (281) passes through the sliding opening (282) and is slidably connected to the sliding opening (282). The locking sleeve (25) has a foolproof hole (284) that is inserted and cooperates with the foolproof rod (283). There are multiple foolproof parts (28). A sealing cover (252) is detachably installed on the top side of the locking sleeve (25).

10. A quick-change tooling for spraying gas turbine combustion chambers according to claim 1, characterized in that: The clamping unit (1) includes a base plate (11) and an isolation frame (12) fixed to the top side of the base plate (11). The isolation frame (12) has multiple fixing holes (13) for quick switching inside. The connecting seat (21) is bolted to the side of the base plate (11) away from the isolation frame (12).

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