A welding clamping device for a combustion chamber transition section

Abstract

The combustion chamber transition section welding clamping device, the front fixed assembly, the middle fixed assembly and the rear fixed assembly are sequentially installed above the base along a first direction, the positioning part is connected with the side close to the middle fixed assembly in the supporting part, the positioning part has a locking state and an unlocking state; in the locking state, the relative position of the positioning part and the supporting part is fixed, in the unlocking state, the positioning part can rotate around the horizontal shaft perpendicular to the first direction; the front fixed assembly, the middle fixed assembly and the rear fixed assembly can all fix the cylindrical structure in the transition section, and the rear fixed assembly can also fix the plate-shaped structure in the transition section on the side close to the middle fixed assembly in the positioning part. The omnibearing adjustable structure design of the clamping device can adapt to the assembly and welding requirements of different specifications and different models of products, reduce the special tooling configuration and repeated manufacturing investment, and reduce the production cost.

Description

Technical Field

[0001] This invention relates to the field of gas turbine component manufacturing technology, specifically to a welding clamping device for a combustion chamber transition section. Background Technology

[0002] Gas turbines, as highly efficient energy conversion devices, are widely used in power generation, ship propulsion, and oil and gas transportation. The combustion chamber transition section, as one of its core components, plays a crucial role in guiding high-temperature, high-pressure gas from the combustion chamber to the turbine guide vanes. Its manufacturing quality directly affects the efficiency, lifespan, and reliability of the gas turbine. The combustion chamber transition section is typically constructed from high-temperature resistant alloys through segmented forming and welding assembly, and is mostly composed of thin-walled components such as the front ring, conical section, irregularly shaped section, and rear mounting edge. Strict requirements are placed on the coaxiality, relative position, assembly angle, and weld quality between the various components. Assembly deviations can easily lead to abnormal gas flow and thermal stress concentration, thereby affecting the service life and operational reliability of the components.

[0003] Currently, the welding assembly of combustion chamber transition sections generally employs fixed, dedicated welding fixtures. These fixtures are typically designed specifically for a particular model of the transition section, using precision machining to manufacture positioning blocks, supports, and clamping mechanisms, which are then fixedly mounted on a base to position, support, and clamp the various components of the transition section. For example, prior art CN120962245A discloses a combustion chamber transition section welding fixture that uses multiple clamping mechanisms to achieve step-by-step positioning and welding assembly of different components. However, existing fixed, dedicated welding fixtures are usually specifically designed for the structural dimensions of a particular model of combustion chamber transition section. Their positioning, support, and clamping positions are difficult to adjust according to the dimensional differences of different transition section models, resulting in poor fixture versatility. When product models change, it is often necessary to redesign and manufacture the corresponding fixtures, which not only increases the manufacturing and management costs of the fixtures and extends the production preparation cycle, but also makes it difficult to meet the flexible assembly requirements of multiple models and small batches of products.

[0004] Therefore, how to provide a welding fixture for the combustion chamber transition section that is highly versatile, flexible in adjustment, and can guarantee assembly accuracy and welding quality has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the first aspect of the present invention provides a welding clamping device for a combustion chamber transition section, comprising a base, a front fixing component, an intermediate fixing component, and a rear fixing component. The front fixing component, the intermediate fixing component, and the rear fixing component are sequentially installed above the base along a first direction. The rear fixing component includes a support portion and a positioning portion, the positioning portion being connected to the support portion, and the positioning portion having a locked state and an unlocked state. In the locked state, the relative position of the positioning portion and the support portion is fixed; in the unlocked state, the positioning portion can rotate about a horizontal axis perpendicular to the first direction. The front fixing component, the intermediate fixing component, and the rear fixing component can all fix the cylindrical structure in the transition section, and the rear fixing component can also fix the plate-like structure in the transition section to the upper end face of the positioning portion. The first direction refers to the direction in which the center line of the transition section extends projected onto the horizontal plane when the transition section is installed in the clamping device.

[0007] Furthermore, the base includes at least one guide rail extending along the first direction, and the front fixing component, the middle fixing component, and the support are all mounted on the same guide rail and are all movable along the guide rail.

[0008] Furthermore, the support portion includes a support end face and a proximal side face, the proximal side face being the side of the support portion closest to the intermediate fixing component, the support end face extending from the upper end of the support portion to the proximal side face, and the positioning portion being hinged to the support end face.

[0009] Furthermore, the angle between the supporting end face and the horizontal plane is 10°~90°.

[0010] Furthermore, the front fixing component includes a first clamping channel, the middle fixing component includes a second clamping channel, and the rear fixing component includes a third clamping channel. The first clamping channel and the second clamping channel are coaxially arranged and both extend along the first direction. The third clamping channel is located in the positioning part, and the projection of the axis of the third clamping channel on the horizontal plane is the same as the first direction.

[0011] Furthermore, the rear fixing component also includes two or more fixing blocks, which are directly or indirectly fixed to the positioning part near the intermediate fixing component around the third clamping channel, and the plate-like structure in the transition section can be fixed to the positioning part by the fixing blocks.

[0012] Furthermore, the rear fixing assembly also includes a sliding guide rail, which surrounds the third clamping channel and is fixed to the positioning part near the middle fixing assembly. The fixing block is mounted on the sliding guide rail and is movable along the sliding guide rail.

[0013] Furthermore, the clamping device further includes two or more clamping components, each clamping component being at least partially embedded in the inner wall of the first clamping channel or the second clamping channel. The end of the clamping component near the channel axis can move radially along the first clamping channel or the second clamping channel to a position protruding from the corresponding inner wall surface. The channel axis is the common axis of the first clamping channel and the second clamping channel.

[0014] Furthermore, the clamping component includes a fixing member and a positioning member. The fixing member is at least partially embedded in the inner wall of the first clamping channel or the second clamping channel, and the positioning member is detachably fixed to the fixing member, and the positioning member is closer to the channel axis than the fixing member.

[0015] Furthermore, the positioning element includes a working surface, which is the end of the positioning element closest to the channel axis, and the contour surface of the working surface is the same as the contour surface of the corresponding part of the cylindrical structure in the transition section.

[0016] Furthermore, at least some of the working surfaces of the positioning element are different from the working surface contours of the other positioning elements.

[0017] Furthermore, the fixing member includes a connecting groove, and the positioning member includes a connecting portion. The connecting groove and the connecting portion cooperate with each other to achieve detachable fixing between the fixing member and the positioning member.

[0018] Furthermore, both the connecting groove and the connecting portion extend along the first direction, the opening width of the connecting groove is smaller than the width of the bottom surface, and the end face width of the connecting portion is larger than the opening width of the connecting groove.

[0019] Furthermore, the clamping device also includes a first linkage member, which extends along the first direction and is detachably fixed to the front fixing component, the middle fixing component, and the rear fixing component. The first linkage member is capable of synchronous movement between the front fixing component, the middle fixing component, and the rear fixing component.

[0020] Furthermore, the clamping device also includes two second linkage members, which are ring-shaped structures. The second linkage members are respectively disposed around the channel axis on the front fixing component and the middle fixing component. The second linkage members can drive the clamping components located on the same fixing component to move synchronously.

[0021] Furthermore, the clamping device also includes a first measuring ruler, which is fixed to the base and located on the side of the front fixing component away from the middle fixing component. The first measuring ruler is capable of measuring the distance between each pair of the front fixing component, the middle fixing component, and the rear fixing component.

[0022] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved: 1. The combustion chamber transition section welding clamping device proposed in this application, through a fully adjustable structure design of a clamping device, can adapt to the assembly and welding needs of products of different specifications and models, avoiding the need to configure special tooling for different products, thereby significantly reducing the types of clamping devices and repeated manufacturing investment, and reducing the overall production cost.

[0023] 2. The combustion chamber transition section welding clamping device proposed in this application does not require frequent disassembly or replacement of the main structure when switching between different product models. The working condition can be switched by simply adjusting the clamping components, which greatly shortens the adjustment and preparation time of the clamping device before production and improves the production cycle and overall processing efficiency.

[0024] 3. The combustion chamber transition section welding clamping device proposed in this application achieves precise control of the spatial position of each component by integrating distance, angle and radial dimension adjustment functions, thereby effectively ensuring the coaxiality, relative position accuracy and angle consistency of each section structure, reducing deformation and misalignment caused by positioning deviation during welding, and significantly improving assembly accuracy and welding quality stability.

[0025] 4. The combustion chamber transition section welding clamping device proposed in this application has a rear fixing component that can provide stable and reliable constraint and support for complex structural parts during the welding process, effectively preventing the workpiece from shifting or deforming under heat and external force, thereby ensuring the stability and consistency of the overall processing.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 A schematic diagram of the welding clamping device described in one embodiment is shown; Figure 2 A schematic diagram of the overall structure of the front fixing component in one embodiment is shown; Figure 3A partial structural schematic diagram of the front fixing component in one embodiment is shown; Figure 4 Showed Figure 3 Enlarged image of the letter "A" in the image; Figure 5 A structural schematic diagram of the rear fixing component in one embodiment is shown.

[0028] Reference numerals: 1. Base; 11. Guide rail; 12. Slider; 13. First measuring scale; 14. First linkage component; 2. Front fixing assembly; 21. Fixing component; 211. Connecting groove; 22. First locking component; 23. Positioning component; 231. Working surface; 232. Connecting part; 24. Second linkage component; 25. Second locking component; 26. First clamping channel; 3. Middle fixing assembly; 31. Second clamping channel; 4. Rear fixing assembly; 41. Support part; 411. Proximal side; 42. Positioning part; 43. Fixing block; 44. Sliding guide rail. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] The present invention will be further described in detail below with reference to specific embodiments, which should not be construed as limiting the scope of protection claimed by the present invention.

[0031] Example

[0032] According to one aspect of the present invention, a welding clamping device for the transition section of a combustion chamber is provided, such as... Figure 1 As shown, the device includes a base 1, a front fixing component 2, a middle fixing component 3, and a rear fixing component 4. The front fixing component 2, the middle fixing component 3, and the rear fixing component 4 are sequentially installed above the base 1 along a first direction. The rear fixing component 4 includes a support part 41 and a positioning part 42. The positioning part 42 is connected to the support part 41 and has a locked state and an unlocked state. In the locked state, the relative position of the positioning part 42 and the support part 41 is fixed. In the unlocked state, the positioning part 42 can rotate about a horizontal axis perpendicular to the first direction. The front fixing component 2, the middle fixing component 3, and the rear fixing component 4 can all fix the cylindrical structure in the transition section. The rear fixing component 4 can also fix the plate-like structure in the transition section to the upper end face of the positioning part 42. The first direction refers to the direction in which the center line of the transition section extends on the horizontal plane when the transition section is installed on the clamping device.

[0033] It should be noted that the cylindrical structure includes a shell structure formed by a transitional front ring, a tapered section, and an irregularly shaped section, and the plate structure includes a rear mounting edge of the transition section. In some embodiments, the cylindrical structure is composed of a shell structure formed by a transitional front ring, a tapered section, and an irregularly shaped section, and the plate structure is the rear mounting edge of the transition section. The upper end face of the positioning part refers to the end face facing vertically upward when the positioning part is in a horizontal position; the name of this end face does not change due to the rotation of the positioning part, and it is defined as the upper end face as long as the positioning part rotates around the horizontal axis to any position.

[0034] The base 1 includes at least one guide rail 11, which extends along the first direction. The front fixing component 2, the intermediate fixing component 3, and the support portion 41 are all mounted on the same guide rail 11 and are all movable along the guide rail 11. Specifically, as shown... Figure 3 As shown, in this embodiment, the intermediate fixing component 3, the front fixing component 2, and the rear fixing component 4 can all move independently along the first direction. The base 1 is provided with two parallel guide rails 11. The bottom of the front fixing component 2, the intermediate fixing component 3, and the support portion 41 are all provided with sliders 12. The sliders 12 are mounted on the guide rails 11, and each slider 12 has a threaded hole in which a locking handle screw is installed. Tightening the locking handle screw causes its front end face to press tightly against the side wall of the guide rail 11, locking the slider 12 through friction. Loosening the screw allows the slider 12 to move freely.

[0035] The clamping device further includes a first linkage member 14, which extends along the first direction and is detachably fixed to the front fixing component 2, the middle fixing component 3, and the rear fixing component 4. The first linkage member 14 enables synchronous movement among the front fixing component 2, the middle fixing component 3, and the rear fixing component 4. Specifically, as shown... Figure 3 As shown, in this embodiment, the first linkage 14 is arranged parallel to the guide rail 11, and the first linkage 14 is detachably fixed to the front fixing component 2, the middle fixing component 3, and the rear fixing component 4 by bolts. When the bolts are loosened or removed, the relative positions of the front fixing component 2, the middle fixing component 3, and the rear fixing component 4 can be adjusted; when the bolts are tightened, the relative positions of the front fixing component 2, the middle fixing component 3, and the rear fixing component 4 remain unchanged, but the three components can move as a whole along the first direction.

[0036] Preferably, the first linkage 14 is a step belt or a lead screw.

[0037] The support portion 41 includes a support end face and a proximal side face 411. The proximal side face 411 is the side of the support portion 41 closest to the intermediate fixing component 3. The support end face extends from the upper end of the support portion 41 to the proximal side face 411. The positioning portion 42 is hinged to the support end face. The angle between the support end face and the horizontal plane is 60°.

[0038] Specifically, such as Figure 5 As shown, in this embodiment, the positioning part 42 is a straight plate structure. A horizontal hinge shaft perpendicular to the first direction is hinged to the top of the supporting end face below the positioning part 42. A worm gear is fixedly mounted on one end of the hinge shaft. The worm meshing with the worm gear is mounted on the side wall of the supporting part 41 via a bearing seat. The axis of the worm and the axis of the hinge shaft are perpendicular in space. The shaft end of the worm extends outward and is fixedly connected to an adjusting handwheel. When the operator turns the handwheel, the worm is driven to rotate, which in turn drives the worm wheel to rotate, thereby driving the positioning part 42 to swing around the hinge shaft through the hinge shaft, achieving precise angle adjustment. Because the worm gear mechanism itself has a reverse self-locking characteristic (i.e., only the worm can drive the worm wheel, and the worm wheel cannot drive the worm in the reverse direction), the inclined positioning plate is automatically locked at the current angle after adjustment and release of the handwheel. Even if vibration occurs during welding, this self-locking characteristic can effectively prevent the inclined positioning plate from shifting angle. An angle measuring ruler is also provided between the positioning part 42 and the support part 41 to accurately set and measure the tilt angle of the positioning part 42 plate.

[0039] Preferably, the angle measuring ruler can be a digital measuring sensor such as a grating ruler, a laser displacement sensor, or a digital angle meter.

[0040] In other embodiments, the angle between the supporting end face and the horizontal plane can also be 10°, 20°, 30°, 40°, 50°, 70°, 80° and 90°, etc.

[0041] like Figure 1-3As shown, the front fixing component 2 includes a first clamping channel 26, the middle fixing component 3 includes a second clamping channel 31, and the rear fixing component 4 includes a third clamping channel. The first clamping channel 26 and the second clamping channel 31 are coaxially arranged and both extend along the first direction. The third clamping channel is located at the positioning part 42, and the projection of the axis of the third clamping channel onto the horizontal plane is the same as the first direction. The clamping device also includes two or more clamping components. Each clamping component is at least partially embedded in the inner wall of the first clamping channel 26 or the second clamping channel 31. The end of the clamping component near the channel axis can move radially along the first clamping channel 26 or the second clamping channel 31 to a position protruding from the corresponding inner wall surface. The channel axis is the common axis of the first clamping channel 26 and the second clamping channel 31.

[0042] Furthermore, such as Figure 4 As shown, the clamping component includes a fixing member 21 and a positioning member 23. The fixing member 21 is at least partially embedded in the inner wall of the first clamping channel 26 or the second clamping channel 31. The positioning member 23 is detachably fixed to the fixing member 21 and is closer to the channel axis than the fixing member 21. The positioning member 23 includes a working surface 231, which is the end of the positioning member 23 closest to the channel axis. The contour surface of the working surface 231 is the same as the contour surface of the corresponding part of the cylindrical structure in the transition section. At least a portion of the working surface 231 of the positioning member 23 has a different contour surface from the working surface 231 of the other positioning members 23.

[0043] Specifically, for cylindrical sections, the working surface 231 is a concave arc-shaped surface; for conical or irregularly shaped sections, the working surface 231 is an adjustable-angle V-shaped surface or a contoured curved surface to ensure line or surface contact with the workpiece surface and avoid damaging the workpiece. When clamping different transition section components, different positioning elements of the working surface 231 can be replaced to achieve clamping of the transition section, ensuring line or surface contact with the workpiece surface and avoiding point contact that could damage the workpiece.

[0044] Furthermore, the fixing member 21 includes a connecting groove 211, and the positioning member 23 includes a connecting portion 232. The connecting groove 211 and the connecting portion 232 cooperate with each other to achieve detachable fixing between the fixing member 21 and the positioning member 23. Both the connecting groove 211 and the connecting portion 232 extend along the first direction. The opening width of the connecting groove 211 is smaller than the width of the bottom surface, and the end face width of the connecting portion 232 is larger than the opening width of the connecting groove 211.

[0045] Specifically, such as Figure 4As shown, the connecting groove 211 is formed at one end of the fixing member 21 near the channel axis and passes through the fixing member 21. The connecting groove 211 is a dovetail groove. The connecting part 232 is slid into the dovetail groove along the first direction to realize the detachable connection between the fixing member 21 and the positioning member.

[0046] In addition, to prevent the positioning component from loosening due to welding vibration, a second locking component 25 is provided between the fixing component 21 and the positioning component 23. To achieve precise adjustment of the clamping component, a second measuring scale is provided on each fixing component 21 to control the radial extension and retraction of the fixing component 21 along the channel. Specifically, in this embodiment, the second locking component 25 is a spring positioning pin. When the positioning component 23 slides along the dovetail groove to the preset position, the ball head of the spring positioning pin engages in the positioning recess on the side of the positioning component 23, achieving quick locking and preventing loosening. When replacement is needed, simply pull out the positioning pin to remove the positioning head.

[0047] Preferably, the second measuring ruler can be a digital measuring sensor such as a grating ruler, a laser displacement sensor, or a digital angle meter.

[0048] like Figure 5 As shown, the rear fixing assembly 4 further includes two or more fixing blocks 43, which are directly or indirectly fixed to the positioning part 42 near the intermediate fixing assembly 3 around the third clamping channel. The plate-like structure in the transition section can be fixed to the positioning part 42 by the fixing blocks 43. The rear fixing assembly 4 also includes a sliding guide rail 44, which is fixed to the positioning part 42 near the intermediate fixing assembly 3 around the third clamping channel. The fixing blocks 43 are mounted on the sliding guide rail 44 and can move along the sliding guide rail 44.

[0049] Furthermore, the clamping device also includes two second linkage members 24. The second linkage members 24 are ring-shaped structures. The second linkage members 24 are respectively arranged around the channel axis on the front fixing component 2 and the middle fixing component 3. The second linkage members 24 can drive the clamping components located on the same fixing component to move synchronously.

[0050] Specifically, in this embodiment, the second linkage member 24 is a ring gear ring. A gear and a gear ring are arranged on the inner ring of the ring gear ring, wherein the teeth are located on the inner ring of the gear ring. The gear simultaneously meshes with the teeth and rack of the inner ring of the second linkage member 24. The rack extends radially along the first channel or the second channel. The second linkage member 24 drives the clamping component to move through the gear and rack. Additionally, in this embodiment, the clamping device further includes two or more first locking members 22. The first locking members 22 are disposed on the side of the front fixing component 2 or the middle fixing component 3. The first locking members 22 can individually adjust the radial extension / retraction position of the clamping component.

[0051] like Figure 1 As shown, the clamping device also includes a first measuring ruler 13, which is fixed to the base 1. The first measuring ruler 13 is located on the side of the front fixing component 2 away from the middle fixing component 3. The first measuring ruler 13 can measure the distance between each pair of the front fixing component 2, the middle fixing component 3 and the rear fixing component 4.

[0052] Preferably, the first measuring ruler 13 can be a digital measuring sensor such as a grating ruler, a laser displacement sensor, or a digital angle meter.

[0053] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved: 1. The combustion chamber transition section welding clamping device proposed in this application, through a fully adjustable structure design of a clamping device, can adapt to the assembly and welding needs of products of different specifications and models, avoiding the need to configure special tooling for different products, thereby significantly reducing the types of clamping devices and repeated manufacturing investment, and reducing the overall production cost.

[0054] 2. The combustion chamber transition section welding clamping device proposed in this application does not require frequent disassembly or replacement of the main structure when switching between different product models. The working condition can be switched by simply adjusting the clamping components, which greatly shortens the adjustment and preparation time of the clamping device before production and improves the production cycle and overall processing efficiency.

[0055] 3. The combustion chamber transition section welding clamping device proposed in this application achieves precise control of the spatial position of each component by integrating distance, angle and radial dimension adjustment functions, thereby effectively ensuring the coaxiality, relative position accuracy and angle consistency of each section structure, reducing deformation and misalignment caused by positioning deviation during welding, and significantly improving assembly accuracy and welding quality stability.

[0056] 4. The combustion chamber transition section welding clamping device proposed in this application has a rear fixing component that can provide stable and reliable constraint and support for complex structural parts during the welding process, effectively preventing the workpiece from shifting or deforming under heat and external force, thereby ensuring the stability and consistency of the overall processing.

[0057] The above are merely several specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0059] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A welding clamping device for a combustion chamber transition section, comprising a base (1), a front fixing assembly (2), a middle fixing assembly (3), and a rear fixing assembly (4), characterized in that, The front fixing component (2), the middle fixing component (3), and the rear fixing component (4) are sequentially installed above the base (1) along a first direction; the rear fixing component (4) includes a support part (41) and a positioning part (42), the positioning part (42) is connected to the support part (41), and the positioning part (42) has a locked state and an unlocked state; in the locked state, the relative position of the positioning part (42) and the support part (41) is fixed, and in the unlocked state, the positioning part (42) can rotate about a horizontal axis perpendicular to the first direction; The front fixing component (2), the middle fixing component (3) and the rear fixing component (4) can all fix the cylindrical structure in the transition section. The rear fixing component (4) can also fix the plate structure in the transition section to the upper end face of the positioning part (42). The first direction refers to the direction in which the center line of the transition section is projected onto the horizontal plane when the transition section is installed on the clamping device.

2. The combustion chamber transition section welding clamping device according to claim 1, characterized in that, The base (1) includes at least one guide rail (11) extending along the first direction. The front fixing component (2), the middle fixing component (3) and the support (41) are all mounted on the same guide rail (11) and can all move along the guide rail (11).

3. The combustion chamber transition section welding clamping device according to claim 1, characterized in that, The support portion (41) includes a support end face and a proximal side face (411). The proximal side face (411) is the side of the support portion (41) closest to the intermediate fixing component (3). The support end face extends from the upper end of the support portion (41) to the proximal side face (411). The positioning portion (42) is hinged to the support end face.

4. The combustion chamber transition section welding clamping device according to claim 3, characterized in that, The angle between the supporting end face and the horizontal plane is 10°~90°.

5. The combustion chamber transition section welding clamping device according to claim 1, characterized in that, The front fixing component (2) includes a first clamping channel (26), the middle fixing component (3) includes a second clamping channel (31), and the rear fixing component (4) includes a third clamping channel. The first clamping channel (26) and the second clamping channel (31) are coaxially arranged and both extend along the first direction. The third clamping channel is located in the positioning part (42), and the projection of the axis of the third clamping channel on the horizontal plane is the same as the first direction.

6. The combustion chamber transition section welding clamping device according to claim 5, characterized in that, The rear fixing component (4) further includes two or more fixing blocks (43), which are directly or indirectly fixed to the positioning part (42) near the middle fixing component (3) around the third clamping channel. The plate-like structure in the transition section can be fixed to the positioning part (42) by the fixing blocks (43).

7. The combustion chamber transition section welding clamping device according to claim 6, characterized in that, The rear fixing component (4) also includes a sliding guide rail (44), which is fixed around the third clamping channel to the positioning part (42) on the side near the intermediate fixing component (3). The fixing block (43) is installed on the sliding guide rail (44) and can move along the sliding guide rail (44).

8. The combustion chamber transition section welding clamping device according to claim 5, characterized in that, The clamping device further includes two or more clamping components, each clamping component being at least partially embedded in the inner wall of the first clamping channel (26) or the second clamping channel (31). The clamping component near the channel axis can move radially along the first clamping channel (26) or the second clamping channel (31) to a position that protrudes from the corresponding inner wall surface. The channel axis is the common axis of the first clamping channel (26) and the second clamping channel (31).

9. The combustion chamber transition section welding clamping device according to claim 8, characterized in that, The clamping component includes a fixing member (21) and a positioning member (23). The fixing member (21) is at least partially embedded in the inner wall of the first clamping channel (26) or the second clamping channel (31). The positioning member (23) is detachably fixed to the fixing member (21) and is closer to the channel axis than the fixing member (21).

10. The combustion chamber transition section welding clamping device according to claim 9, characterized in that, The positioning element (23) includes a working surface (231), which is the end of the positioning element (23) closest to the channel axis. The contour surface of the working surface (231) is the same as the contour surface of the corresponding part of the cylindrical structure in the transition section.

11. The combustion chamber transition section welding clamping device according to claim 10, characterized in that, At least some of the working surfaces (231) of the positioning element (23) are different from the contour surfaces of the working surfaces (231) of the other positioning elements (23).

12. The combustion chamber transition section welding clamping device according to any one of claims 9-11, characterized in that, The fixing member (21) includes a connecting groove (211), and the positioning member (23) includes a connecting part (232). The connecting groove (211) and the connecting part (232) cooperate with each other to achieve detachable fixing between the fixing member (21) and the positioning member (23).

13. The combustion chamber transition section welding clamping device according to claim 12, characterized in that, Both the connecting groove (211) and the connecting part (232) extend along the first direction. The opening width of the connecting groove (211) is smaller than the width of the bottom surface, and the end face width of the connecting part (232) is larger than the opening width of the connecting groove (211).

14. The combustion chamber transition section welding clamping device according to claim 2, characterized in that, The clamping device further includes a first linkage member (14), which extends along the first direction and is detachably fixed to the front fixing component (2), the middle fixing component (3) and the rear fixing component (4). The first linkage member (14) can realize synchronous movement between the front fixing component (2), the middle fixing component (3) and the rear fixing component (4).

15. The combustion chamber transition section welding clamping device according to claim 8, characterized in that, The clamping device further includes two second linkage members (24). The second linkage members (24) are ring-shaped structures. The second linkage members (24) are respectively arranged around the channel axis on the front fixing component (2) and the middle fixing component (3). The second linkage members (24) can drive the clamping components located on the same fixing component to move synchronously.

16. The combustion chamber transition section welding clamping device according to claim 5, characterized in that, The clamping device further includes a first measuring ruler (13), which is fixed to the base (1). The first measuring ruler (13) is located on the side of the front fixing component (2) away from the middle fixing component (3). The first measuring ruler (13) can measure the distance between each pair of the front fixing component (2), the middle fixing component (3) and the rear fixing component (4).

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