Flange pushing device and air pipe prefabrication production line

Abstract

This invention relates to the field of duct prefabrication technology, specifically to a flange pushing device and a duct prefabrication production line. The flange pushing device includes a pushing mechanism and a baffle mechanism; the pushing mechanism and the baffle mechanism are placed on the frame of a flange storage rack; the movable end of the pushing mechanism faces the baffle mechanism, and the pushing mechanism can drive the baffle mechanism to push the flanges stored on the frame one by one to the edge of the frame. The flange pushing device and duct prefabrication production line provided by this invention realize the automatic pushing of flanges on the storage rack, replacing the traditional manual pushing method, improving work efficiency, and avoiding the bumps and damage to the flanges caused by manual pushing.

Description

Technical Field

[0001] This invention relates to the field of duct prefabrication technology, specifically to a flange pushing device and a duct prefabrication production line. Background Technology

[0002] The prefabrication process for ductwork in nuclear power plants typically includes sequential steps such as uncoiling, marking and cutting, shearing, crimping and seaming, folding, joining, connecting the duct to the flange, and flanging the duct.

[0003] Currently, before assembling flanges with ducts, the flanges need to be removed from the storage rack and then assembled with the ducts. This process relies on manually pushing the flanges to the edge of the storage rack, then grabbing them and assembling them with the ducts. Manually pushing the flanges on the storage rack results in low work efficiency and may also damage the flanges during the manual movement process. Summary of the Invention

[0004] (a) The technical problem to be solved by the present invention is that manually moving the flange on the storage rack will result in low work efficiency and may also cause damage to the flange during the manual movement of the flange. (II) Technical Solution To solve the above-mentioned technical problems, embodiments of the present invention provide a flange pushing device, which is installed on the flange storage rack of the duct prefabrication production line, including a pushing mechanism and a baffle mechanism; The pushing mechanism and the baffle mechanism are placed on the frame of the flange storage rack; The moving end of the pushing mechanism faces the baffle mechanism, and the pushing mechanism can drive the baffle mechanism to push the flanges stored on the frame one by one to the edge of the frame.

[0005] Furthermore, the baffle mechanism includes a guide assembly, a push plate, and a limiting plate; One end of the guide assembly is connected to the frame, and the other end extends parallel to the frame toward the side away from the frame; The push plate is sleeved on the guide assembly, and the push plate can move along the extension direction of the guide assembly; The guide assembly is provided with a limiting plate at the end opposite to the frame, and the limiting plate can prevent the push plate from detaching from the guide assembly.

[0006] Furthermore, the push plate includes a plate body and a top block; The plate is fitted onto the guide assembly, and the plate is also provided with top blocks. There are four top blocks, and each top block corresponds to one of the four sides of the flange.

[0007] Furthermore, the guide assembly includes four guide rods, and the push plate has sliding holes at positions corresponding to the guide rods. The guide rods are slidably connected to the push plate through the sliding holes.

[0008] Furthermore, the push plate is generally rhomboid in shape, and the top block is provided at each of the four apex corners of the push plate; A bushing is embedded in the sliding hole.

[0009] Furthermore, the pushing mechanism includes a fixed housing, a pusher head, and a drive assembly; The fixed shell is fixed on the frame, and the push head is located at one end of the fixed shell facing the push plate. The fixed shell is also provided with the drive assembly, which is connected to the push head in a transmission manner. The drive assembly drives the push head to push the push plate.

[0010] Furthermore, the drive assembly includes a drive motor, a transmission part, and a movable inner rod; The drive motor and the movable inner rod are both located inside the fixed housing. The movable inner rod extends along the axial direction of the fixed housing, and the end of the movable inner rod facing the push plate is provided with the push head. The drive motor is connected to the movable inner rod via the transmission part, so as to drive the movable inner rod to extend and retract along the axial direction of the fixed shell.

[0011] Furthermore, guide sliders are symmetrically fixed on the two opposite sides of the movable inner rod along its own radial direction, and sliding grooves are symmetrically opened on the two inner side walls of the fixed shell corresponding to the guide sliders, and the guide sliders are slidably connected to the sliding grooves.

[0012] Furthermore, the transmission part includes a lead screw and a lead screw nut; The lead screw is connected to the output end of the drive motor, and the lead screw nut is located at the end of the movable inner rod and is threaded with the lead screw.

[0013] Embodiments of the present invention also provide a duct prefabrication production line, including the flange pushing device described above.

[0014] The beneficial effects of this invention are: This invention provides a flange pushing device, including a pushing mechanism and a baffle mechanism. Both the pushing mechanism and the baffle mechanism are placed on the frame of a flange storage rack, forming an integral part of the rack. The movable end of the pushing mechanism faces the baffle mechanism, and the flanges are stored on the frame corresponding to the baffle mechanism. The pushing mechanism drives the baffle mechanism to push the flanges stored on the frame one by one to the edge of the frame, facilitating subsequent operations. Through the cooperation of the pushing mechanism and the baffle mechanism, automatic pushing of flanges on the storage rack is achieved, replacing the traditional manual pushing method, improving work efficiency, and avoiding bumps and damage to the flanges caused by manual pushing.

[0015] The present invention provides a prefabrication production line for air ducts, including the flange pushing device mentioned above, which inherits all its beneficial effects. This production line realizes the automation of the flange storage and pushing process, eliminates the efficiency bottleneck and quality risk caused by manual flange pushing, and effectively reduces the overall production cost, providing a strong guarantee for the efficient and high-quality production of nuclear power air ducts. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the flange pushing device provided in an embodiment of the present invention; Figure 2 A side view of the flange pushing device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram showing the connection between the flange pushing device and the flange storage rack provided in an embodiment of the present invention.

[0018] icon: 100-Flange storage rack; 200-Push plate; 201-Limit plate; 202-Plate body; 203-Top block; 204-Guide rod; 205-Bushing; 300-Fixed housing; 301-Push head; 302-Drive motor; 303-Modible inner rod. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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] In the description of this invention, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0022] Example 1 like Figures 1 to 3 As shown, the present invention provides a flange pushing device, which is installed on the flange storage rack 100 of the duct prefabrication production line, including a pushing mechanism and a baffle mechanism; The pushing mechanism and the baffle mechanism are placed on the frame of the flange storage rack 100; The moving end of the pushing mechanism faces the baffle mechanism, and the pushing mechanism can drive the baffle mechanism to push the flanges stored on the frame one by one to the edge of the frame.

[0023] In this embodiment, a pushing mechanism and a baffle mechanism are included. Both the pushing mechanism and the baffle mechanism are placed on the frame of the flange storage rack 100, forming an integral part of the flange storage rack 100. The movable end of the pushing mechanism faces the baffle mechanism, and the flanges are stored on the frame corresponding to the baffle mechanism. The pushing mechanism can drive the baffle mechanism to push the flanges stored on the frame one by one to the edge of the frame, facilitating subsequent work processes. Through the cooperation of the pushing mechanism and the baffle mechanism, this embodiment realizes the automatic pushing of flanges on the storage rack, replacing the traditional manual pushing method, improving work efficiency, and avoiding bumps and damage to the flanges caused by manual pushing.

[0024] Specifically, when a flange needs to be retrieved, the pushing mechanism is activated, its movable end extending outwards to push the baffle mechanism towards the edge of the frame. During this movement, the rear end face of the baffle mechanism contacts the stored flange, pushing the flange forward as a whole. Once the foremost flange is pushed to the retrieval position at the edge of the frame, the pushing mechanism pauses, and the gripping device removes the foremost flange. The pushing mechanism then continues to advance, pushing the next flange to the retrieval position, and this cycle repeats, achieving automatic flange pushing one by one.

[0025] According to one embodiment provided by the present invention, such as Figure 1 and Figure 2 As shown, the baffle mechanism includes a guide assembly, a push plate 200, and a limiting plate 201; One end of the guide assembly is connected to the frame, and the other end extends parallel to the frame toward the side away from the frame; The push plate 200 is sleeved on the guide assembly, and the push plate 200 can move along the extension direction of the guide assembly; A limiting plate 201 is provided at the end of the guide assembly away from the frame. The limiting plate 201 can prevent the push plate 200 from detaching from the guide assembly.

[0026] In this embodiment, one end of the guide assembly is connected to the frame, and the other end extends parallel to the frame towards the side opposite to the frame. The guide assembly provides precise guidance for the movement of the push plate 200, ensuring that the push plate 200 maintains the correct direction and posture during the pushing process, and avoiding uneven force or jamming of the flange due to skew. Accordingly, the extension direction of the guide assembly is consistent with the pushing direction of the flange.

[0027] The push plate 200 is fitted onto the guide assembly and can move along the extension direction of the guide assembly. The push plate 200 is the component in the baffle mechanism that directly contacts the flange and transmits thrust; its rear end face contacts the movable end of the pushing mechanism, and its front end face contacts the stored flange. When the pushing mechanism pushes the push plate 200, the push plate 200 slides forward along the guide assembly, transmitting thrust to the flange.

[0028] A limiting plate 201 is provided at the end of the guide assembly away from the frame. The limiting plate 201 prevents the push plate 200 from detaching from the guide assembly. The limiting plate 201 is fixed to the end of the guide assembly. When the push plate 200 moves to the end of the guide assembly, the limiting plate 201 blocks the push plate 200 from moving further forward, preventing the push plate 200 from detaching from the guide assembly. At the same time, the limiting plate 201 also determines the maximum stroke of the push plate 200, limiting the farthest position of the flange push.

[0029] Through the cooperation of the guide component, the push plate 200 and the limiting plate 201, this embodiment achieves precise guidance and stroke limitation of the push plate 200 in the pushing direction, ensuring the stability and safety of the pushing action.

[0030] According to one embodiment provided by the present invention, such as Figure 1 and Figure 2 As shown, the push plate 200 includes a plate body 202 and a top block 203; The plate 202 is fitted onto the guide assembly. The plate 202 is also provided with a top block 203. There are four top blocks 203, which correspond to the four sides of the flange respectively.

[0031] In this embodiment, the plate 202 is fitted onto the guide assembly and is the main body of the push plate 200, used to connect the guide assembly and the top block 203. The plate 202 can be made of sheet metal, possessing sufficient rigidity and strength to withstand the thrust applied by the pushing mechanism. The plate 202 is also provided with four top blocks 203, each corresponding to one of the four sides of the flange. Specifically, the four top blocks 203 are arranged in a rhomboid pattern on the front end face of the plate 202, corresponding to the four sides of the rectangular flange: the top, bottom, left, and right sides. When the push plate 200 moves forward, the four top blocks 203 simultaneously contact the four sides of the flange, evenly distributing the thrust across the four sides of the flange.

[0032] The four top blocks 203 can make multiple contacts with the flange, so that the thrust is evenly distributed on the flange, avoiding the deformation or deflection caused by uneven stress on the flange due to single-point thrust; it can also ensure that the flange maintains the correct posture during the pushing process and will not rotate or tilt; in addition, the contact between the top blocks 203 and the flange is surface contact or line contact, with low contact stress, which will not cause damage to the flange surface, and the four top blocks 203 can also automatically correct the flange posture during the pushing process.

[0033] According to one embodiment provided by the present invention, such as Figure 1 and Figure 2 As shown, the guide assembly includes four guide rods 204. The push plate 200 has sliding holes at the corresponding positions of the guide rods 204, and the guide rods 204 are slidably connected to the push plate 200 through the sliding holes.

[0034] In this embodiment, four guide rods 204 are respectively arranged in the four corner areas of the push plate 200, extending along the pushing direction. Specifically, one end of the guide rod 204 is fixed to the frame of the flange storage rack 100, and the other end extends outward in the pushing direction. The four guide rods 204 are parallel to each other, forming a stable guiding system. Four sliding holes are provided on the push plate 200 at positions corresponding to the four guide rods 204. The guide rods 204 pass through the sliding holes, and the push plate 200 can slide axially along the guide rods 204.

[0035] Four guide rods 204 are distributed at the four corners of the push plate 200, providing stable multi-point guidance and effectively preventing the push plate 200 from swaying and shaking during the pushing process. Furthermore, the four guide rods 204 share the weight of the push plate 200 and the lateral force during the pushing process, improving the load-bearing capacity and rigidity of the guiding system. The symmetrical arrangement of the four guide rods 204 makes the force on the push plate 200 more balanced. Of course, four guide pillars can be added to the four guide rods 204, i.e., one guide pillar is placed below each guide rod 204, to increase the stability of the guide rods 204.

[0036] According to one embodiment provided by the present invention, such as Figure 1 and Figure 2 As shown, the push plate 200 is generally rhomboid in shape, and top blocks 203 are provided at the four apex corners of the push plate 200. A bushing 205 is embedded in the sliding hole.

[0037] In this embodiment, the four apex corners of the rhomboid push plate 200 correspond to the four sides of the rectangular flange, and the four top blocks 203 are disposed at the apex corners. The rhomboid shape allows the force to be evenly transmitted from the center to the four apex corners when the push plate 200 is subjected to force, avoiding stress concentration. At the same time, the rhomboid outline clearly identifies the positions of the four top blocks 203 visually and structurally, facilitating assembly and adjustment.

[0038] Furthermore, a bushing 205 is embedded within the sliding hole. The bushing 205 is an annular sleeve installed on the inner wall of the sliding hole, and its inner diameter is adapted to the outer diameter of the guide rod 204. The bushing 205 can be made of a self-lubricating material, which has a low coefficient of friction and good wear resistance. The bushing 205 converts the sliding friction between the push plate 200 body and the guide rod 204 into friction between the bushing 205 and the guide rod 204, protecting the push plate 200 body from wear. That is to say, when the bushing 205 wears, only the bushing 205 needs to be replaced to restore the sliding performance, without replacing the entire push plate 200, thus reducing maintenance costs. Optionally, the bushing 205 can be fixed to the sliding hole by interference fit or bonding to ensure that the bushing 205 will not experience axial movement or circumferential rotation during use.

[0039] Of course, a sliding bearing or a linear bearing can also be used between the guide rod 204 and the sliding hole to reduce sliding friction and improve the smoothness and response speed of the push.

[0040] According to one embodiment provided by the present invention, such as Figure 1 As shown, the pushing mechanism includes a fixed housing 300, a pusher head 301, and a drive assembly; The fixed shell 300 is fixed on the frame, and the push head 301 is located at the end of the fixed shell 300 facing the push plate 200. The fixed shell 300 is also provided with a drive assembly, which is connected to the push head 301 in a transmission manner. The drive assembly drives the push head 301 to push the push plate 200.

[0041] In this embodiment, the fixed housing 300 is fixedly mounted on the frame, serving as the mounting base and outer shell of the pushing mechanism. The fixed housing 300 has a hollow structure, housing the driving components and protecting them from dust and debris that could affect transmission accuracy and lifespan. One end of the fixed housing 300 (the end facing the push plate 200) has an opening for the push head 301 to extend out.

[0042] The pusher head 301 is the component that directly contacts the pusher plate 200. The front end face of the pusher head 301 contacts the rear end face of the pusher plate 200, transmitting the thrust generated by the drive assembly to the pusher plate 200. A buffer pad layer can be provided on the end face of the pusher head 301 to reduce impact and noise when in contact with the pusher plate 200.

[0043] A drive assembly is also provided inside the fixed housing 300, and the drive assembly is connected to the push head 301 in a transmission manner. The drive assembly is the power source and transmission component of the pushing mechanism. The power generated by the drive assembly is transmitted to the push head 301 through the transmission mechanism, and the drive assembly drives the push head 301 to push the push plate 200.

[0044] According to one embodiment provided by the present invention, such as Figure 1 and Figure 2 As shown, the drive assembly includes a drive motor 302, a transmission part, and a movable inner rod 303; Both the drive motor 302 and the movable inner rod 303 are located inside the fixed housing 300. The movable inner rod 303 extends along the axial direction of the fixed housing 300, and a push head 301 is provided at the end of the movable inner rod 303 facing the push plate 200. The drive motor 302 is connected to the movable inner rod 303 through the transmission part, so as to drive the movable inner rod 303 to extend and retract along the axial direction of the fixed shell 300.

[0045] In this embodiment, both the drive motor 302 and the movable inner rod 303 are housed within the fixed housing 300. The drive motor 302 is fixed to the tail end of the fixed housing 300 (the end facing away from the push plate 200) and serves as a power source. The drive motor 302 is preferably a servo motor, possessing precise speed and position control capabilities. The movable inner rod 303 extends axially along the fixed housing 300, and a push head 301 is provided at its end facing the push plate 200. The movable inner rod 303 can extend and retract axially along the fixed housing 300; when extended, it pushes the push plate 200, and when retracted, it resets the push plate 200.

[0046] The drive motor 302 is connected to the movable inner rod 303 via a transmission unit, thereby driving the movable inner rod 303 to extend and retract axially along the fixed housing 300. The transmission unit converts the rotational motion of the drive motor 302 into the linear motion of the movable inner rod 303.

[0047] Specifically, when a flange needs to be pushed, the control terminal sends a command to the drive motor 302. The drive motor 302 rotates forward, driving the movable inner rod 303 to extend outward through the transmission unit. The push head 301 at the end of the movable inner rod 303 pushes the push plate 200 forward, pushing the flange to the pick-up position. After all flanges have been removed, the drive motor 302 rotates in the reverse direction, the movable inner rod 303 retracts, and the push plate 200 follows suit and retracts for the next push.

[0048] According to one embodiment of the present invention, the movable inner rod 303 is symmetrically fixed on two opposite side walls along its own radial direction, and the fixed shell 300 is symmetrically provided with two inner side walls corresponding to the guide sliders, and the guide sliders are slidably connected to the slide grooves.

[0049] In this embodiment, the guide slider is a block-shaped structure that protrudes radially outward from the outer wall of the movable inner rod 303, and the two guide sliders are arranged opposite each other in the diametrical direction of the movable inner rod 303. A groove is provided on the inner wall of the fixed shell 300 at a position corresponding to the guide slider. The groove extends along the axial direction of the fixed shell 300, and its cross-sectional shape is adapted to the cross-sectional shape of the guide slider.

[0050] When the movable inner rod 303 extends or retracts within the fixed housing 300, the guide slider slides along the groove. The cooperation between the guide slider and the groove restricts the radial displacement of the movable inner rod 303 within the fixed housing 300, ensuring the coaxiality of the movable inner rod 303 and the fixed housing 300, and preventing the movable inner rod 303 from wobbling when it extends. Furthermore, the sliding of the guide slider within the groove provides precise linear guidance for the movable inner rod 303, ensuring the linearity of the extension and retraction movement, and also preventing the movable inner rod 303 from rotating during the extension and retraction process.

[0051] According to one embodiment of the present invention, the transmission part includes a lead screw and a lead screw nut; The lead screw is connected to the output end of the drive motor 302, and the lead screw nut is located at the end of the movable inner rod 303 and is threaded with the lead screw.

[0052] In this embodiment, the lead screw is connected to the output end of the drive motor 302 via a coupling or direct connection, and rotates synchronously with the output shaft of the drive motor 302. The outer surface of the lead screw is provided with precision external threads. A lead screw nut is located at the end of the movable inner rod 303, fixedly connected to the movable inner rod 303, and the lead screw nut is threadedly engaged with the lead screw.

[0053] When the drive motor 302 rotates, it drives the lead screw to rotate synchronously. The rotational motion of the lead screw is converted into linear motion of the lead screw nut along the lead screw axis through the threaded engagement between the lead screw nut and the lead screw. Since the lead screw nut is fixed to the end of the movable inner rod 303, the linear motion of the lead screw nut drives the movable inner rod 303 to extend and retract synchronously.

[0054] Among them, the lead screw is preferably a ball screw, which has balls between the lead screw and the lead screw nut, which converts sliding friction into rolling friction, greatly reducing transmission friction and wear, and improving transmission efficiency and service life.

[0055] Example 2 The present invention provides a duct prefabrication production line, including the flange pushing device described above.

[0056] In this embodiment, the duct prefabrication production line is used for the automated prefabrication of seam ducts in nuclear power engineering, and includes an uncoiling device, a marking and cutting device, a shearing device, a rib pressing and seaming device, a folding device, a seam closing device, and the flange pushing device of the present invention.

[0057] like Figure 3 As shown, in this production line, the flange pushing device is installed on the flange storage rack 100, located at the flange storage station. The storage rack adopts a four-sided rotating structure, and the pushing mechanism of the flange pushing device is fixed on the central rotating shaft of the storage rack. The baffle mechanism is set in each storage unit, and the movable end of the pushing mechanism can sequentially align with each storage unit to push the flange.

[0058] During production line operation, when a flange in a storage unit needs to be retrieved, the control terminal sends a command to the drive motor 302 of the pushing mechanism. The drive motor 302 drives the movable inner rod 303 to extend via a lead screw drive, and the push head 301 pushes the push plate 200 forward along the guide assembly. The four top blocks 203 on the push plate 200 apply force evenly from the four sides of the flange, pushing the flange one by one along the sliding track of the storage rack to the edge retrieval position. After the gripping device removes the frontmost flange, the drive motor 302 continues to advance, pushing the next flange to the retrieval position. When all the flanges in the storage unit have been retrieved, the rotary frame rotates 90° to switch to the next station, achieving uninterrupted automatic ejection at four stations in a cycle.

[0059] By integrating the aforementioned flange pushing device into the duct prefabrication production line, the production line automates the flange storage and pushing process, eliminating the efficiency bottlenecks and quality risks caused by manual flange pushing, and effectively reducing the overall production cost, thus providing a strong guarantee for the efficient and high-quality production of nuclear power duct prefabrication.

[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flange pushing device, installed on a flange storage rack (100) of a duct prefabrication production line, characterized in that, Including the propulsion mechanism and the baffle mechanism; The pushing mechanism and the baffle mechanism are placed on the frame of the flange storage rack (100); The moving end of the pushing mechanism faces the baffle mechanism, and the pushing mechanism can drive the baffle mechanism to push the flanges stored on the frame one by one to the edge of the frame.

2. The flange pushing device according to claim 1, characterized in that, The baffle mechanism includes a guide assembly, a push plate (200), and a limiting plate (201). One end of the guide assembly is connected to the frame, and the other end extends parallel to the frame toward the side away from the frame; The push plate (200) is sleeved on the guide assembly, and the push plate (200) can move along the extension direction of the guide assembly; The guide assembly is provided with a limiting plate (201) at the end opposite to the frame, and the limiting plate (201) can prevent the push plate (200) from detaching from the guide assembly.

3. The flange pushing device according to claim 2, characterized in that, The push plate (200) includes a plate body (202) and a top block (203); The plate (202) is sleeved on the guide assembly. The plate (202) is also provided with a top block (203). There are four top blocks (203), and the top blocks (203) correspond to the four sides of the flange respectively.

4. The flange pushing device according to claim 3, characterized in that, The guiding assembly includes four guide rods (204). The push plate (200) has a sliding hole at the corresponding position of the guide rod (204). The guide rod (204) is slidably connected to the push plate (200) through the sliding hole.

5. The flange pushing device according to claim 4, characterized in that, The push plate (200) is generally rhomboid in shape, and the top block (203) is provided at each of the four apex corners of the push plate (200). A bushing (205) is embedded in the sliding hole.

6. The flange pushing device according to any one of claims 2-5, characterized in that, The pushing mechanism includes a fixed housing (300), a push head (301), and a drive assembly; The fixed shell (300) is fixed on the frame, and the push head (301) is located at one end of the fixed shell (300) facing the push plate (200). The fixed shell (300) is also provided with the drive assembly. The drive assembly is connected to the push head (301) in a transmission manner. The drive assembly drives the push head (301) to push the push plate (200).

7. The flange pushing device according to claim 6, characterized in that, The drive assembly includes a drive motor (302), a transmission part, and a movable inner rod (303). The drive motor (302) and the movable inner rod (303) are both located inside the fixed shell (300). The movable inner rod (303) extends along the axial direction of the fixed shell (300), and the end of the movable inner rod (303) facing the push plate (200) is provided with the push head (301). The drive motor (302) is connected to the movable inner rod (303) through the transmission part, so as to drive the movable inner rod (303) to extend and retract along the axial direction of the fixed shell (300).

8. The flange pushing device according to claim 7, characterized in that, The movable inner rod (303) is symmetrically fixed with guide sliders on its two opposite sides along its own radial direction. The fixed shell (300) is symmetrically provided with sliding grooves on its two inner side walls corresponding to the guide sliders. The guide sliders are slidably connected to the sliding grooves.

9. The flange pushing device according to claim 7, characterized in that, The transmission unit includes a lead screw and a lead screw nut; The lead screw is connected to the output end of the drive motor (302) for transmission, and the lead screw nut is located at the end of the movable inner rod (303) and is threaded with the lead screw.

10. A prefabrication production line for air ducts, characterized in that, Includes the flange pushing device according to any one of claims 1-9.

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