Fixture mechanism for welding air inlet barrel

Abstract

The invention belongs to the technical field of air inlet barrel welding, and discloses a clamp mechanism for air inlet barrel welding, which comprises a support table and a plurality of air barrel wall pieces, and further comprises a rotating disc rotationally mounted on the support table, and a gear motor for driving the rotating disc to rotate is mounted on the support table. According to the scheme, the multiple sets of air duct wall pieces are placed on the multiple sets of supporting bottom plate pieces correspondingly, the inner walls of the air duct wall pieces are in lap joint with the supporting ring frame, and meanwhile the oil pumping mechanism pumps oil into the tension spring piston telescopic rod and enables the tension spring piston telescopic rod to extend to push the bottoms of the air duct wall pieces to move towards the blocking part; the edges of the two sets of air duct wall parts located on the supporting bottom plate part can be separated by the guiding part, and the air duct wall parts are clamped and fixed after gaps are reserved in the edges of the two air duct wall parts, so that synchronous clamping and fixing operation on the bottoms of the multiple air duct wall parts is achieved. The problem that in the fixing and welding process of the air duct wall piece, welding line dislocation and uneven assembling gaps are likely to be caused, and the welding quality is affected is solved.

Description

Technical Field

[0001] This invention belongs to the field of air inlet duct welding technology, specifically a clamping mechanism for air inlet duct welding. Background Technology

[0002] An air inlet duct is a key pneumatic component used in ventilation, dust removal, air conditioning, and various power equipment. Its function is to efficiently and smoothly guide gas into subsequent systems. This type of component is usually a thin-walled cylindrical or irregularly shaped cylindrical structure, and is often welded together from multiple cylindrical sections.

[0003] When manufacturing and welding air inlet ducts, operators typically use simple V-blocks, three-jaw chucks, and spot welding for fixation, or rely entirely on manual support for positioning, to secure the duct wall components and facilitate subsequent welding. However, the simple V-blocks used in these methods are poorly suited for irregularly shaped or large-diameter ducts and often fail to provide stable support. While three-jaw chucks can provide some clamping force, they are prone to deformation of thin-walled components and are difficult to adjust, resulting in time and labor costs. Relying entirely on manual support leads to low stability, makes it difficult to guarantee welding accuracy, poses safety hazards during welding, and increases the operator's workload. These factors can easily lead to problems such as weld misalignment and uneven assembly gaps, thereby affecting welding quality and the overall performance of the component.

[0004] Therefore, in order to solve the above problems, a clamping mechanism for welding air inlet casings is proposed. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention provides a clamping mechanism for welding air inlet ducts, which solves the problem that existing methods for fixing and welding air inlet duct wall components can easily lead to weld misalignment and uneven assembly gaps, thus affecting welding quality.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a clamping mechanism for welding air inlet ducts, comprising a support platform and several air duct wall components, and further comprising: a rotating disk rotatably mounted on the support platform, wherein a gear motor for driving the rotating disk to rotate is mounted on the support platform; The rotating disk has a support cylinder and a gear ring fixedly connected to its top and bottom, respectively. A support ring frame is fixedly connected to the top of the support cylinder. A top clamping mechanism and a bottom clamping mechanism for clamping the top and bottom of several air duct wall components are respectively installed on the rotating disk and the support cylinder. The gear at the output end of the gear motor meshes with the gear ring. The inner wall of the top of the air duct wall component can overlap the outer periphery of the support ring frame.

[0007] Preferably, the top clamping mechanism includes a support cage fixedly installed on the top of the support cylinder, a cylinder located in the support cylinder is fixedly installed at the bottom of the support cage, the output end of the cylinder passes upward through the support cage and extends to the top of the support cage, a plurality of guide blocks are fixedly connected to the top of the support cage in a circular array, a set of guide grooves are opened on the guide blocks in a symmetrical direction, a plurality of connecting rods are hinged to the output end of the cylinder, a slider that can slide in the corresponding guide groove is rotatably connected to the middle of the connecting rod, and a column is fixedly connected to the top of the connecting rod. In the initial state, the bottom end of the connecting rod is located below the guide block, the column is located outside the duct wall component, and the bottom end of the column can abut against the outer periphery of the corresponding duct wall component.

[0008] Preferably, the bottom clamping mechanism includes a supporting base plate component arranged in a ring array and fixedly installed on the top of the rotating disk. The top of the supporting base plate component is provided with a blocking part, and a guide part is provided on the blocking part. A set of tension spring piston telescopic rods is fixedly connected to the supporting base plate component, and the output end of the tension spring piston telescopic rods faces the blocking part. An oil delivery pipe that can communicate with several tension spring piston telescopic rods is placed on the rotating disk. An oil pumping mechanism for pumping hydraulic oil into the oil delivery pipe is installed on the rotating disk. The bottom of the air duct wall component can be placed on the top of the supporting base plate component.

[0009] Preferably, the output end of the tension spring piston telescopic rod and the blocking part are spaced apart by a distance greater than the thickness of the duct wall.

[0010] Preferably, the oil pipeline is fixedly connected to several sets of three-way pipes, and the other two ends of the three-way pipes are respectively connected to a set of tension spring piston telescopic rods on the supporting base plate.

[0011] Preferably, the oil pumping mechanism includes a sleeve fixedly mounted on a rotating disk, and a piston is movably mounted inside the sleeve; wherein the piston end of the piston is located in the cavity of the sleeve, and the rod end of the piston can pass through the sleeve and extend to its outside. The stroke of the piston end on the piston member within the sleeve member is greater than the stroke of the tension spring piston telescopic rod, and the area of ​​the piston end on the piston member is less than the sum of the areas of the piston ends on several tension spring piston telescopic rods.

[0012] Preferably, the rod portion of the piston component is a screw, and the screw can be threaded to one end of the sleeve component, and the end of the screw portion away from the sleeve component is a hexagonal bolt head.

[0013] Preferably, the supporting base plate is further provided with a positioning mechanism for leaving a gap between the two duct wall components.

[0014] Preferably, the positioning mechanism includes a bent rod hinged to the top of the blocking part, one end of which can extend above the supporting base plate and is located between the output ends of the two sets of tension spring piston telescopic rods. A straight groove is provided on the bent rod. A set of tension spring combination top rods is symmetrically and movably installed on the blocking part. Both ends of the tension spring combination top rods can extend to the outside of the blocking part. A convex shaft is movably sleeved in the straight groove. The two ends of the convex shaft are respectively fixedly connected to the ends of the two tension spring combination top rods. One end of the spring portion on the tension spring assembly push rod is fixedly connected to the blocking part facing the convex shaft, and the other end of the spring portion on the tension spring assembly push rod is fixedly connected to the rod body portion of the tension spring assembly push rod. In the initial state, the tension spring assembly push rod has a tendency to move towards the direction of the tension spring piston telescopic rod.

[0015] Preferably, the portion of the bent rod located between the two sets of tension spring piston telescopic rods is an inclined portion, the inclined portion is in an inclined state, and the portion of the inclined portion near the blocking portion is the highest point.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The above solution involves placing several sets of duct wall components on several sets of support base plates and overlapping the inner walls of the duct wall components with the support ring frame. The operating cylinder drives the bottom end of the connecting rod to move upward and rotate around the axis. At this time, the slider will slide outward in the guide groove and cause the connecting rod to rotate around the axis with the slider as the center, and drive the bottom end of the column to contact the outer periphery of the duct wall component, thereby fixing the top of the duct wall component. At the same time, the oil pumping mechanism pumps oil into the extension rod of the tension spring piston and causes it to extend and push the bottom of the duct wall component to move towards the blocking part. At this time, the edges of the two sets of duct wall components on the support base plate will be separated by the guide part, and after leaving a gap between the edges of the two duct wall components, the duct wall components are clamped and fixed. This achieves synchronous clamping and fixing of the bottom of several duct wall components, solving the problem that the welding quality is affected by weld misalignment and uneven assembly gap during the fixing and welding of duct wall components. The above solution involves placing the duct wall components on the supporting base plate so that the adjacent edges of the two duct wall components contact the two sides of the bending rod. When the tension spring piston extension rod extends and pushes the duct wall component toward the blocking part, the bottom edge of the duct wall component will squeeze the tension spring combination top rod and drive the convex shaft to move in the straight groove. At this time, the bending rod will rotate downward about the top of the bending rod as the axis. After the tension spring piston extension rod and the blocking part are clamped and fixed, the end of the tension spring combination top rod near the duct wall component will be inside the blocking part. At this time, the rotation angle of the bending rod is at its maximum and it is no longer in contact with the edges of the two duct wall components, which facilitates the subsequent welding of the duct wall components. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front cross-sectional view of the support cylinder of the present invention; Figure 3 This is a schematic diagram of the cooperation structure between the support cage and the cylinder of the present invention; Figure 4 This is a schematic diagram of the disassembled structure of the top clamping mechanism of the present invention; Figure 5 This is a bottom view of the rotating disk structure of the present invention; Figure 6 This is a top view of the rotating disk structure of the present invention; Figure 7 This is a schematic diagram of the structure of the supporting base plate component of the present invention; Figure 8 This is a side cross-sectional view of the supporting base plate of the present invention; Figure 9 This is a schematic diagram of the structure of the ventilation duct wall component of the present invention; Figure 10 for Figure 9 Enlarged view of point A in the middle.

[0018] In the diagram: 1. Support platform; 2. Gear motor; 3. Rotary disk; 31. Support cylinder; 32. Support ring frame; 33. Gear ring; 4. Top clamping mechanism; 41. Support cage frame; 42. Cylinder; 43. Guide block; 44. Guide groove; 45. Connecting rod; 46. Slider; 47. Column; 5. Bottom clamping mechanism; 51. Support base plate; 52. Tension spring piston telescopic rod; 53. Oil pipeline; 531. Three-way pipeline; 54. Blocking part; 55. Guide part; 56. Oil pumping mechanism; 561. Sleeve; 562. Piston; 6. Positioning mechanism; 61. Bending rod; 611. Inclined part; 62. Straight groove; 63. Tension spring combined top rod; 64. Convex shaft; 7. Air duct wall component. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 10As shown, the present invention provides a clamping mechanism for welding air inlet ducts, including a support platform 1 and a plurality of air duct wall components 7, and further including: a rotating disk 3 rotatably mounted on the support platform 1, and a gear motor 2 for driving the rotating disk 3 to rotate is mounted on the support platform 1; wherein, a support cylinder 31 and a gear ring 33 are respectively fixedly connected to the top and bottom of the rotating disk 3, a support ring frame 32 is fixedly connected to the top of the support cylinder 31, and a top clamping mechanism 4 and a bottom clamping mechanism 5 for clamping the top and bottom of the plurality of air duct wall components 7 are respectively mounted on the rotating disk 3 and the support cylinder 31, and the gear at the output end of the gear motor 2 meshes with the gear ring 33; the inner wall of the top of the air duct wall component 7 can overlap the outer periphery of the support ring frame 32; The top clamping mechanism 4 includes a support cage 41 fixedly installed on the top of the support cylinder 31. A cylinder 42 located in the support cylinder 31 is fixedly installed at the bottom of the support cage 41. The output end of the cylinder 42 passes upward through the support cage 41 and extends to the top of the support cage 41. Several guide blocks 43 are fixedly connected to the top of the support cage 41 in a circular array. A set of guide grooves 44 are opened on the guide blocks 43 in a symmetrical direction. Several connecting rods 45 are hinged to the output end of the cylinder 42. A slider 46 that can slide in the corresponding guide groove 44 is rotatably connected to the middle of the connecting rod 45. A column member 47 is fixedly connected to the top of the connecting rod 45. In the initial state, the bottom end of the connecting rod 45 is located below the guide block 43, and the column 47 is located outside the wind tunnel wall 7. The bottom end of the column 47 can abut against the outer periphery of the corresponding wind tunnel wall 7. The bottom clamping mechanism 5 includes a supporting base plate 51 arranged in a ring array and fixedly installed on the top of the rotating disk 3. The top of the supporting base plate 51 is provided with a blocking part 54, and a guide part 55 is provided on the blocking part 54. A set of tension spring piston telescopic rods 52 are fixedly connected to the supporting base plate 51. The output end of the tension spring piston telescopic rods 52 faces the blocking part 54. An oil delivery pipe 53 that can communicate with several tension spring piston telescopic rods 52 is placed on the rotating disk 3. An oil pumping mechanism 56 for pumping hydraulic oil into the oil delivery pipe 53 is installed on the rotating disk 3. The bottom of the duct wall component 7 can be placed on top of the supporting base plate component 51.

[0021] Using the above scheme, several sets of duct wall components 7 are placed on several sets of support base plates 51, and the inner wall of the duct wall component 7 is attached to the support ring frame 32. The operating cylinder 42 drives the bottom end of the connecting rod 45 to move upward and rotate around the axis. At this time, the slider 46 will slide outward in the guide groove 44, causing the connecting rod 45 to rotate around the axis with the slider 46 as the center, and driving the bottom end of the column component 47 to contact the outer periphery of the duct wall component 7, thereby fixing the top of the duct wall component 7. At the same time, the oil pumping mechanism 56 Oil is pumped into the extension rod 52 of the tension spring piston and extends it to push the bottom of the air duct wall component 7 toward the blocking part 54. At this time, the edges of the two sets of air duct wall components 7 on the support base plate 51 will be separated by the guide part 55 and after leaving a gap between the edges of the two air duct wall components 7, the air duct wall components 7 will be clamped and fixed. This realizes the synchronous clamping and fixing operation of the bottom of several air duct wall components 7, which solves the problem that the weld misalignment and uneven assembly gap are easily caused during the fixing and welding of air duct wall components, thus affecting the welding quality. like Figures 5-8 and Figure 10 As shown, there is a gap between the output end of the tension spring piston telescopic rod 52 and the blocking part 54 that is greater than the thickness of the air duct wall part 7; several sets of three-way pipes 531 are fixedly connected to the oil pipeline 53, and the other two ends of the three-way pipes 531 are respectively connected to a set of tension spring piston telescopic rods 52 on the support base plate part 51. The oil pumping mechanism 56 includes a sleeve 561 fixedly mounted on the rotating disk 3, and a piston 562 movably mounted inside the sleeve 561. The piston end of the piston 562 is located in the cavity of the sleeve 561, and the rod end of the piston 562 can pass through the sleeve 561 and extend to its outside. The stroke of the piston end on the piston 562 within the sleeve 561 is greater than the stroke of the tension spring piston telescopic rod 52, and the area of ​​the piston end of the piston 562 is less than the sum of the areas of the piston ends on several tension spring piston telescopic rods 52. The rod portion of the piston 562 is a screw, and the screw can be threaded to one end of the sleeve 561, and the end of the screw portion away from the sleeve 561 is a hexagonal bolt head; Using the above scheme, the operator can rotate the piston 562 with a wrench and drive the piston end of the piston 562 to move inside the sleeve 561. The hydraulic oil in the sleeve 561 is then input into the tension spring piston telescopic rod 52 through the oil supply pipe 53 and the three-way pipe 531, and the tension spring piston telescopic rod 52 is driven to extend. When the rotation of the piston 562 stops, the self-locking of the screw part on the piston 562 ensures the stability of the tension spring piston telescopic rod 52 clamping the bottom of the air duct wall component 7. At the same time, when the operator rotates the piston 562 in the opposite direction, the piston end of the piston 562 retracts in the sleeve 561, which can draw back the oil in the tension spring piston telescopic rod 52 through the three-way pipe 531 and the oil supply pipe 53, thereby improving the clamping and disassembly efficiency of the air duct wall component 7.

[0022] like Figures 6-10 As shown, the supporting base plate 51 is also provided with a positioning mechanism 6 for leaving a gap between the two air duct wall parts 7; the positioning mechanism 6 includes a bent rod 61 hinged to the top of the blocking part 54, one end of the bent rod 61 can extend to the top of the supporting base plate 51 and is located between the output ends of the two sets of tension spring piston telescopic rods 52, the bent rod 61 is provided with a straight groove 62, a set of tension spring combination top rods 63 are symmetrically installed on the blocking part 54, both ends of the tension spring combination top rods 63 can extend to the outside of the blocking part 54, a convex shaft 64 is movably sleeved in the straight groove 62, and the two ends of the convex shaft 64 are respectively fixedly connected to the ends of the two tension spring combination top rods 63; One end of the spring portion on the tension spring assembly push rod 63 is fixedly connected to the blocking part 54 on the side facing the convex shaft 64, and the other end of the spring portion on the tension spring assembly push rod 63 is fixedly connected to the rod body portion of the tension spring assembly push rod 63. In the initial state, the tension spring assembly push rod 63 has a tendency to move towards the direction of the tension spring piston telescopic rod 52. The part of the bent rod 61 located between the two sets of tension spring piston telescopic rods 52 is the inclined part 611. The inclined part 611 is in an inclined state, and the part of the inclined part 611 near the blocking part 54 is the highest point. Using the above scheme, by placing the air duct wall component 7 on the supporting base plate 51, the adjacent edges of the two air duct wall components 7 are respectively in contact with the two sides of the bending rod 61. When the tension spring piston telescopic rod 52 extends and pushes the air duct wall component 7 toward the blocking part 54, the bottom edge of the air duct wall component 7 will squeeze the tension spring combination top rod 63 and drive the convex shaft 64 to move in the straight groove 62. At this time, the bending rod 61 will rotate downward about the top of the bending rod 61 as the axis. After the tension spring piston telescopic rod 52 and the blocking part 54 are clamped and fixed, the end of the tension spring combination top rod 63 near the air duct wall component 7 will be inside the blocking part 54. At this time, the rotation angle of the bending rod 61 is at its maximum and it is no longer in contact with the edges of the two air duct wall components 7, which facilitates the subsequent welding of the air duct wall component 7. By setting the inclined part 611, the lowest point of the inclined part 611 is placed in the supporting base plate 51, so that both ends of the bent rod 61 are supported, thereby ensuring the overall stability of the bent rod 61 and preventing the inclined part 611 from being squeezed to the side by the wind tunnel wall 7 and bending and deforming.

[0023] Working principle and usage process of this invention: During operation, the operator places several sets of duct wall components 7 on several sets of support base plates 51, and simultaneously overlaps the inner wall of the duct wall component 7 with the support ring frame 32. The cylinder 42 is operated so that its output end moves upward, driving the bottom end of the connecting rod 45 to move upward, causing the connecting rod 45 to rotate around its axis. At this time, the slider 46 slides outward in the guide groove 44, causing the connecting rod 45 to rotate around its axis, and causing the bottom end of the column component 47 to contact the outer periphery of the duct wall component 7. This achieves the fixation of the top of the air duct wall component 7. At the same time, the operator pumps oil into the oil pumping mechanism 56 to drive the extension rod 52 of the tension spring piston to extend and push the bottom of the air duct wall component 7 toward the blocking part 54. At this time, the edges of the two sets of air duct wall components 7 on the supporting base plate 51 will be separated by the guide part 55 and after leaving a gap between the edges of the two air duct wall components 7, the air duct wall components 7 will be clamped and fixed, thus achieving the synchronous clamping and fixing operation of the bottom of several air duct wall components 7. When the operator places the air duct wall component 7 on the support base plate 51, the adjacent edges of the two air duct wall components 7 will contact the two sides of the bending rod 61 respectively. When the tension spring piston telescopic rod 52 extends and pushes the air duct wall component 7 toward the blocking part 54, the bottom edge of the air duct wall component 7 will squeeze the tension spring combination top rod 63 and drive the convex shaft 64 to move in the straight groove 62. At this time, the bending rod 61 will rotate downward about the top of the bending rod 61 as the axis. After the tension spring piston telescopic rod 52 and the blocking part 54 are clamped and fixed, the end of the tension spring combination top rod 63 near the air duct wall component 7 will be inside the blocking part 54. At this time, the rotation angle of the bending rod 61 is at its maximum and it is no longer in contact with the edges of the two air duct wall components 7, which facilitates the subsequent welding of the air duct wall component 7.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamping mechanism for welding air inlet ducts, comprising a support platform (1) and a plurality of air inlet duct wall components (7), characterized in that, Also includes: Rotate the rotating disk (3) mounted on the support platform (1), and the support platform (1) is equipped with a gear motor (2) for driving the rotating disk (3) to rotate. Among them, the top and bottom of the rotating disk (3) are respectively fixedly connected to the support cylinder (31) and the gear ring (33), the top of the support cylinder (31) is fixedly connected to the support ring frame (32), the rotating disk (3) and the support cylinder (31) are respectively equipped with a top clamping mechanism (4) and a bottom clamping mechanism (5) for clamping the top and bottom of several air duct wall parts (7), and the gear at the output end of the gear motor (2) meshes with the gear ring (33); The top inner wall of the duct wall component (7) can overlap the outer periphery of the support ring frame (32).

2. The clamping mechanism for welding air inlet ducts according to claim 1, characterized in that: The top clamping mechanism (4) includes a support cage (41) fixedly installed on the top of the support cylinder (31). A cylinder (42) located in the support cylinder (31) is fixedly installed at the bottom of the support cage (41). The output end of the cylinder (42) passes upward through the support cage (41) and extends to the top of the support cage (41). Several guide blocks (43) are fixedly connected to the top of the support cage (41) in a circular array. A set of guide grooves (44) are opened on the guide blocks (43) in a symmetrical direction. Several connecting rods (45) are hinged to the output end of the cylinder (42). A slider (46) that can slide in the corresponding guide groove (44) is rotatably connected to the middle of the connecting rod (45). A column (47) is fixedly connected to the top of the connecting rod (45). In the initial state, the bottom end of the connecting rod (45) is located below the guide block (43), the column (47) is located outside the wind tunnel wall (7), and the bottom end of the column (47) can abut against the outer periphery of the corresponding wind tunnel wall (7).

3. The clamping mechanism for welding air inlet ducts according to claim 1, characterized in that: The bottom clamping mechanism (5) includes a supporting base plate (51) arranged in a ring and fixedly installed on the top of the rotating disk (3). The top of the supporting base plate (51) is provided with a blocking part (54), and a guide part (55) is provided on the blocking part (54). A set of tension spring piston telescopic rods (52) are fixedly connected to the supporting base plate (51). The output end of the tension spring piston telescopic rods (52) faces the blocking part (54). An oil delivery pipe (53) that can communicate with several tension spring piston telescopic rods (52) is placed on the rotating disk (3). An oil pumping mechanism (56) for pumping hydraulic oil into the oil delivery pipe (53) is installed on the rotating disk (3). The bottom of the duct wall component (7) can be placed on top of the supporting base plate component (51).

4. The clamping mechanism for welding air inlet ducts according to claim 3, characterized in that: The output end of the tension spring piston telescopic rod (52) and the blocking part (54) are spaced apart by a distance greater than the thickness of the wind tunnel wall (7).

5. The clamping mechanism for welding air inlet ducts according to claim 3, characterized in that: The oil pipeline (53) is fixedly connected to several sets of three-way pipes (531), and the other two ends of the three-way pipes (531) are respectively connected to a set of tension spring piston telescopic rods (52) on the support base plate (51).

6. The clamping mechanism for welding air inlet ducts according to claim 3, characterized in that: The oil pumping mechanism (56) includes a sleeve (561) fixedly installed on the rotating disk (3), and a piston (562) is movably installed inside the sleeve (561). Wherein, the piston end of the piston member (562) is located in the cavity of the sleeve member (561), and the rod end of the piston member (562) can pass through the sleeve member (561) and extend to its outside; The stroke of the piston end on the piston member (562) within the sleeve member (561) is greater than the stroke of the tension spring piston telescopic rod (52), and the area of ​​the piston end on the piston member (562) is less than the sum of the areas of the piston ends on several tension spring piston telescopic rods (52).

7. The clamping mechanism for welding air inlet ducts according to claim 6, characterized in that: The piston (562) has a screw rod as its rod body, and the screw rod can be threaded to one end of the sleeve (561), and the end of the screw rod away from the sleeve (561) is a hexagonal bolt head.

8. The clamping mechanism for welding air inlet ducts according to claim 3, characterized in that: The supporting base plate (51) is also provided with a positioning mechanism (6) for leaving a gap between the two duct wall components (7).

9. The clamping mechanism for welding air inlet ducts according to claim 8, characterized in that: The positioning mechanism (6) includes a bent rod (61) hinged to the top of the blocking part (54). One end of the bent rod (61) can extend above the supporting base plate (51) and is located between the output ends of the two sets of tension spring piston telescopic rods (52). A straight groove (62) is provided on the bent rod (61). A set of tension spring combination top rods (63) is symmetrically installed on the blocking part (54). Both ends of the tension spring combination top rods (63) can extend to the outside of the blocking part (54). A convex shaft (64) is movably sleeved in the straight groove (62). The two ends of the convex shaft (64) are respectively fixedly connected to the ends of the two tension spring combination top rods (63). One end of the spring portion of the tension spring assembly rod (63) is fixedly connected to the blocking part (54) on the side facing the convex shaft (64), and the other end of the spring portion of the tension spring assembly rod (63) is fixedly connected to the rod body portion of the tension spring assembly rod (63). In the initial state, the tension spring assembly rod (63) has a tendency to move in the direction of the tension spring piston telescopic rod (52).

10. The clamping mechanism for welding air inlet ducts according to claim 9, characterized in that: The portion of the bent rod (61) located between the two sets of tension spring piston telescopic rods (52) is an inclined portion (611). The inclined portion (611) is in an inclined state, and the portion of the inclined portion (611) near the blocking portion (54) is the highest point.

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