Air pipe sealing gasket mounting and positioning device and using method thereof

Abstract

The invention relates to the technical field of air pipe installation, and discloses an air pipe sealing gasket installing and positioning device and a using method thereof.The device comprises an air pipe, an assembling frame, a driving disc and the like, a flange is arranged on an external connector of the air pipe, the assembling frame is inserted into the air pipe, and the driving disc and other components are installed on the air pipe. During use, the assembling frame is inserted into the air pipe to enable the connecting frame to reach the corresponding position of the flange; the rotating shaft is rotated, the two-way lead screw is driven to rotate through meshing transmission of the second bevel gear and the first bevel gear, and the sliding blocks on the two sides drive the rotary connection sleeve and the clamping block to expand outwards and abut against the inner wall of the air pipe to complete device positioning. The sealing gasket sleeves the positioning clamping block, the transmission disc is rotated, the transmission groove drives the insertion plate and the positioning clamping block to expand outwards through the limiting pin, and coaxial positioning of the sealing gasket and the air pipe is achieved; after positioning, the sealing gasket and the flange are pasted through colloid, and the rotating shaft is rotated reversely to draw out the assembly frame. Installation accuracy is improved, time and labor cost is reduced, sealing performance is enhanced, and the service life of an air pipe system is prolonged.

Description

Technical Field

[0001] This invention relates to the field of duct installation technology, specifically to a duct sealing gasket installation and positioning device and its usage method. Background Technology

[0002] In the field of ventilation system construction and maintenance, duct installation is a critical step, and the proper installation and positioning of duct gaskets plays a vital role in ensuring the airtightness and normal operation of the entire ventilation system. Appropriate gasket installation and positioning ensures tight, leak-free duct connections, maintains stable airflow within the ventilation system, and prevents energy waste and system failures caused by air leaks.

[0003] Common methods for installing and positioning duct gaskets are cumbersome. Installers typically need to manually adjust the gasket's position based on experience, making it difficult to guarantee precise coaxial positioning during installation. Due to the lack of an effective synchronous positioning mechanism, the gasket is prone to misalignment, leading to inaccurate installation. This not only consumes a significant amount of time but also requires considerable manpower for repeated adjustments and confirmations. Furthermore, inaccurate positioning results in poor fit between the gasket and the duct, failing to meet the requirements of duct installation. Therefore, this paper proposes a duct gasket installation and positioning device and its usage method. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a duct sealing gasket installation and positioning device and its usage method to solve the technical problems of easy misalignment and poor sealing performance of the sealing gasket during installation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a duct sealing gasket installation and positioning device and its usage method, comprising:

[0006] The air duct has a flange installed at its external connection port, an assembly frame inserted inside the air duct, a connecting frame installed on the back of the assembly frame, and a transmission disc installed on the front of the assembly frame. The transmission groove is circumferentially opened inside the transmission disc. An insert plate is inserted inside the assembly frame. A positioning block is connected to the outer end of the insert plate. A sealing gasket is sleeved on the outside of the positioning block. A limiting pin is inserted into the transmission groove. The outer end of the limiting pin is connected to the surface of the insert plate. A rotating shaft is inserted into the inside of the assembly frame. A bearing sleeve is installed at the bottom of the connecting frame. A two-way lead screw is inserted into the inside of the bearing sleeve. The first bevel tooth is coaxially sleeved on the outer side of the bidirectional lead screw, and the second bevel tooth is coaxially mounted on the outer end of the rotating shaft at a position corresponding to the first bevel tooth, and the first bevel tooth and the second bevel tooth mesh with each other; A slider is screwed onto both sides of the outside of the bidirectional lead screw. A screw-connecting sleeve is connected to the outside of the slider. The screw-connecting sleeve is fitted onto the outside of the bidirectional lead screw. A locking block is installed at the outer end of the screw-connecting sleeve.

[0007] A method for using a duct sealing gasket installation and positioning device, based on the above-mentioned duct sealing gasket installation and positioning device, is characterized by comprising the following steps: S1 assembly rack insertion and alignment: First, insert the assembly frame into the duct, and then extend the connecting frame into the corresponding position of the flange at the external connection port of the duct. S2 shaft drive and bevel gear transmission: Next, rotate the operating end of the rotating shaft to drive the second bevel gear, which is coaxially mounted with the rotating shaft, to rotate. Through the meshing transmission between the second bevel gear and the first bevel gear, the bidirectional lead screw is driven to rotate inside the bearing sleeve. S3 Card Block Expansion and Device Positioning: When the bidirectional screw rotates, the sliders screwed on both sides of its outer side move synchronously in the opposite direction along the axis of the bidirectional screw, driving the screw sleeve and the locking block connected to the slider to expand outward synchronously until the locking block tightly abuts against the inner wall of the air duct, completing the overall installation and positioning of the device. S4 sealing gasket set and coaxial positioning: After the device is installed and positioned in step S3, the sealing gasket is placed on the outside of the positioning block. The outer peripheral lever of the transmission disc is rotated to make the transmission disc rotate around the assembly. During the rotation of the transmission disc, the transmission groove opened in the circumferential direction inside it drives the insert plate to expand outward synchronously inside the assembly frame through the limit pin, thereby driving the positioning block to open synchronously until the positioning block is tightly attached to the inner wall of the sealing gasket, so as to achieve coaxial positioning of the sealing gasket and the air duct. S5 positioning and equipment removal: After the gasket is positioned, it is installed by attaching it to the flange with adhesive. Then, the shaft is rotated in the opposite direction to retract the locking block and detach it from the inner wall of the duct. The assembly frame is then removed to complete the installation and positioning of the gasket.

[0008] Preferably, the number of transmission grooves and insert plates is at least 3 sets, the outer periphery of the transmission disc is connected to a lever, the limiting pin is a T-shaped rod, the outer end diameter of the limiting pin is greater than the width of the transmission groove, and multiple sets of transmission grooves and insert plates are provided. With the lever and T-shaped limiting pin, the positioning block can be driven more stably and accurately, making the installation and positioning of the sealing gasket more reliable and improving the practicality of the device.

[0009] Preferably, an assembly set is connected to the outer middle position of the assembly frame, the rotating shaft passes through the interior of the assembly set, and a ball bearing is installed on the outer side of the transmission disk located outside the assembly set. The transmission disk and the ball bearing are sleeved on the outside of the assembly set. The arrangement of the assembly set and the ball bearing makes the transmission disk rotate more smoothly and flexibly, reduces friction loss, reduces the difficulty of operation, and ensures the stability and efficiency of the coordinated work of various components of the device.

[0010] Preferably, the operating end of the rotating shaft is coaxially equipped with a handwheel, the locking block is arc-shaped, the outer surface of the locking block is covered with damping pads, and the connection between the connecting frame and the assembly frame is welded with reinforcing ribs. The handwheel facilitates the operation of the rotating shaft, the arc-shaped locking block and the damping pads can better fit the inner wall of the air duct, and the reinforcing ribs enhance the connection strength, making the device positioning more stable and improving the installation quality of the sealing gasket.

[0011] Preferably, the lower part of the connecting frame is connected to a mounting frame, and both sides of the bottom of the mounting frame are connected to a card seat. The card seat has a sliding groove in the middle of its interior. The design of the mounting frame and the card seat provides additional support and fixing points for the device. The sliding groove facilitates position adjustment and enhances the overall stability of the device.

[0012] Preferably, each of the slide grooves is equipped with a slide block, and both the slide groove and the slide block are convex in shape. The outer end of the slide block is connected to the corresponding position on the outside of the slider. The convex slide groove and the slide block cooperate to make the slide block move more smoothly and accurately follow the movement of the slider, ensuring the synchronization of the expansion and contraction of the block and improving the accuracy and reliability of the device positioning.

[0013] Preferably, in step S1, when inserting the assembly frame, the inner wall of the duct and the contact surface of the flange are cleaned first. That is, a preliminary cleaning is performed with a brush, and then the inner wall of the duct and the contact surface of the flange are wiped with cleaning fluid and cotton cloth. Cleaning the inner wall of the duct and the contact surface of the flange can remove impurities and dust, ensure smooth insertion of the assembly frame, improve installation positioning accuracy, and lay a good foundation for high-quality installation of the sealing gasket.

[0014] Preferably, in step S4, before the sealing gasket is fitted onto the outside of the positioning block, the sealing gasket is preheated, that is, the sealing gasket is heated in a constant temperature heating device, and then an adhesive is applied to the side of the sealing gasket that contacts the flange. Preheating the sealing gasket and applying the adhesive makes the sealing gasket material softer and more flexible, making it easier to fit and enhancing the firmness of the adhesion to the flange, thereby improving the sealing effect and installation quality.

[0015] Preferably, in step S5, after the assembly frame is pulled out, the inner wall of the air duct and the corresponding position of the card block are wiped, and protective oil is applied to the outer surface of the card block. Wiping the inner wall of the air duct and applying protective oil after pulling out the assembly frame can prevent residual impurities from affecting the seal, protect the card block, extend the service life of the device, and ensure the stability of subsequent use.

[0016] Compared with the prior art, the present invention provides a duct sealing gasket installation and positioning device and its usage method, which has the following beneficial effects: This duct sealing gasket installation and positioning device and its usage method involve rotating a shaft to drive the rotation of a second conical tooth, which in turn drives the rotation of a bidirectional lead screw via the first conical tooth. This, in turn, drives the movement of a slider, which in turn clamps the gasket inside the duct through the expansion of the screw-fit sleeve and the locking block. Subsequently, rotating the transmission disc drives the synchronous expansion of the limit pin and the insert plate through the transmission groove, thereby causing the positioning locking block to expand synchronously. This ensures coaxial positioning of the sealing gasket, preventing it from shifting during installation, improving installation accuracy, and reducing the time and labor costs required for installation. At the same time, precise positioning improves the fit between the sealing gasket and the duct, enhances sealing performance, reduces the probability of air leakage during duct use, and extends the service life of the duct system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the duct structure of the present invention; Figure 3 This is a schematic diagram of the assembly frame and transmission disc structure of the present invention; Figure 4 This is a schematic cross-sectional view of the transmission disc structure of the present invention; Figure 5 This is a schematic diagram of the connecting frame and mounting frame structure of the present invention; Figure 6 This is a schematic diagram of the connecting frame and bearing sleeve structure of the present invention; Figure 7 This is a schematic diagram of the card holder and slide structure of the present invention; Figure 8 This is a flowchart of the method of using the present invention.

[0018] In the diagram: 1. Air duct; 2. Flange; 3. Assembly frame; 4. Connecting frame; 5. Transmission plate; 6. Transmission groove; 7. Insert plate; 8. Positioning block; 9. Sealing gasket; 10. Limit pin; 11. Mounting bracket; 12. Card seat; 13. Rotating shaft; 14. Bearing sleeve; 15. Double-acting lead screw; 151. First bevel gear; 152. Second bevel gear; 16. Sliding block; 17. Screw coupling sleeve; 18. Card block; 19. Slide groove; 20. Slide seat; 21. Assembly kit; 22. Ball bearing; 23. Handwheel. 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] This invention provides a technical solution: a duct sealing gasket installation and positioning device and its usage method, comprising a duct 1, a flange 2, an assembly frame 3, a connecting frame 4, a transmission disc 5, a transmission groove 6, an insert plate 7, a positioning block 8, a sealing gasket 9, a limit pin 10, a mounting bracket 11, a mounting seat 12, a rotating shaft 13, a bearing sleeve 14, a double-acting screw 15, a slider 16, a screw-fit sleeve 17, a locking block 18, a sliding groove 19, a sliding seat 20, an assembly set 21, a ball bearing 22, and a handwheel 23. Please see Figure 1 Flange 2 is installed at the external connection port of duct 1. Please refer to [link / reference]. Figure 2 An assembly bracket 3 is inserted inside the air duct 1, and a connecting bracket 4 is installed on the back of the assembly bracket 3. Please refer to [link / reference]. Figure 3 The front side of the assembly frame 3 is equipped with a transmission disc 5; Transmission groove 6 is circumferentially formed inside transmission disc 5. Please refer to [link / reference]. Figure 4 An insert plate 7 is inserted inside the assembly frame 3, and a positioning block 8 is connected to the outer end of the insert plate 7. A sealing gasket 9 is fitted on the outside of the positioning block 8. The limiting pin 10 is inserted into the transmission groove 6, and its outer end is connected to the surface of the insert plate 7. A rotating shaft 13 is inserted into the interior of the assembly frame 3. (See also...) Figure 6 A bearing sleeve 14 is installed at the bottom of the connecting frame 4, and a bidirectional lead screw 15 is inserted inside the bearing sleeve 14. The first bevel tooth 151 is coaxially sleeved on the outer side of the bidirectional lead screw 15, and the second bevel tooth 152 is coaxially mounted on the outer end of the rotating shaft 13 at a position corresponding to the first bevel tooth 151. The first bevel tooth 151 and the second bevel tooth 152 mesh with each other. The slider 16 is screwed onto both sides of the outside of the double-acting lead screw 15. A screw-on sleeve 17 is connected to the outside of the slider 16. The screw-on sleeve 17 is sleeved on the outside of the double-acting lead screw 15. A locking block 18 is installed at the outer end of the screw-on sleeve 17. The number of transmission grooves 6 and insert plates 7 is at least 3 sets. A lever is connected to the outer periphery of the transmission disc 5. The limiting pin 10 is a T-shaped rod. The outer diameter of the limiting pin 10 is greater than the width of the transmission groove 6. An assembly set 21 is connected to the outer middle position of the assembly frame 3. The rotating shaft 13 passes through the interior of the assembly set 21. A ball bearing 22 is installed on the outer side of the transmission disc 5 at the outer position of the assembly set 21. The transmission disc 5 and the ball bearing 22 are sleeved on the outside of the assembly set 21. A handwheel 23 is coaxially mounted on the operating end of the rotating shaft 13. The locking block 18 is arc-shaped, and damping pads are laid on the outer surface of the locking block 18. Reinforcing ribs are welded at the connection between the connecting frame 4 and the assembly frame 3. Please refer to [link / reference]. Figure 5 The lower part of the connecting bracket 4 is connected to the mounting bracket 11, and the bottom sides of the mounting bracket 11 are both connected to the card holders 12. Please refer to [link / reference]. Figure 7 Each slot 19 is provided in the middle of the card holder 12, and each slot 19 is provided with a slide block 20. Both the slot 19 and the slide block 20 are convex in shape, and the outer end of the slide block 20 is connected to the corresponding position on the outside of the slider 16. The rotation of the second bevel gear 152 driven by the rotating shaft 13 drives the rotation of the bidirectional lead screw 15 through the first bevel gear 151, which in turn drives the movement of the slider 16. The slider 16 is then clamped inside the duct 1 by the expansion of the screw sleeve 17 and the clamping block 18. Subsequently, the rotation of the transmission disk 5 drives the synchronous expansion of the limit pin 10 and the insert plate 7 through the transmission groove 6, which in turn causes the positioning clamping block 8 to expand synchronously to coaxially position the sealing gasket 9, preventing it from shifting during installation, improving installation accuracy, and reducing the time and labor costs required for installation. At the same time, precise positioning can improve the fit between the sealing gasket 9 and the duct 1, enhance the sealing performance, reduce the probability of air leakage during use, and extend the service life of the duct system. Please see Figure 8 A method for using a duct sealing gasket installation and positioning device, based on the above-mentioned duct sealing gasket installation and positioning device, is characterized by comprising the following steps: S1 assembly rack insertion and alignment: First, insert the assembly frame 3 into the air duct 1, so that the connecting frame 4 extends into the corresponding position of the flange 2 at the external connection port of the air duct 1 along with the assembly frame 3. When inserting the assembly frame 3, first clean the inner wall of the air duct 1 and the contact surface of the flange 2. That is, first use a brush to clean it initially, and then wipe the inner wall of the air duct 1 and the contact surface of the flange 2 with cleaning fluid and cotton cloth. S2 shaft drive and bevel gear transmission: Next, rotate the operating end of the rotating shaft 13 to drive the second bevel gear 152, which is coaxially mounted with the rotating shaft 13, to rotate. Through the meshing transmission between the second bevel gear 152 and the first bevel gear 151, the bidirectional lead screw 15 is driven to rotate inside the bearing sleeve 14. S3 Card Block Expansion and Device Positioning: When the bidirectional lead screw 15 rotates, the sliders 16 screwed on both sides of its outer side move synchronously in the opposite direction along the axis of the bidirectional lead screw 15, driving the screw sleeve 17 and the locking block 18 connected to the slider 16 to expand outward synchronously until the locking block 18 tightly abuts against the inner wall of the air duct 1, completing the overall installation and positioning of the device. S4 sealing gasket set and coaxial positioning: After the device is installed and positioned in step S3, the sealing gasket 9 is placed on the outside of the positioning block 8. The outer peripheral lever of the transmission disk 5 is rotated to make the transmission disk 5 rotate around the mounting 21. During the rotation of the transmission disk 5, the transmission groove 6 opened in the inner circumference drives the insert plate 7 to expand outward synchronously inside the assembly frame 3 through the limit pin 10, thereby driving the positioning block 8 to open synchronously until the positioning block 8 is tightly attached to the inner wall of the sealing gasket 9, realizing the coaxial positioning of the sealing gasket 9 and the air duct 1. Before placing the sealing gasket 9 on the outside of the positioning block 8, the sealing gasket 9 is preheated by placing the sealing gasket 9 in a constant temperature heating device for heating, and then coating the side of the sealing gasket 9 that contacts the flange 2 with an adhesive. S5 positioning and equipment removal: After the sealing gasket 9 is positioned, it is installed by attaching it to the flange 2 with adhesive. Then, the shaft 13 is rotated in the opposite direction to retract the locking block 18 and detach it from the inner wall of the air duct 1. The assembly frame 3 is then removed to complete the installation and positioning of the sealing gasket 9. After the assembly frame 3 is removed, the inner wall of the air duct 1 and the corresponding positions of the locking block 18 are wiped, and protective oil is applied to the outer surface of the locking block 8.

[0021] This solution uses the rotating shaft 13 to drive the rotation of the second bevel gear 152, which in turn drives the rotation of the bidirectional lead screw 15 via the first bevel gear 151. This, in turn, drives the movement of the slider 16, which is then clamped inside the duct 1 by the outward expansion of the screw sleeve 17 and the clamping block 18. Subsequently, by rotating the transmission disk 5, the transmission groove 6 drives the synchronous outward expansion of the limiting pin 10 and the insert plate 7, which in turn causes the positioning clamping block 8 to expand synchronously, thus coaxially positioning the sealing gasket 9. This prevents it from shifting during installation, improves installation accuracy, and reduces the time and labor costs required for installation. At the same time, precise positioning improves the fit between the sealing gasket 9 and the duct 1, enhances sealing performance, reduces the probability of air leakage during use, and extends the service life of the duct system.

[0022] 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.

[0023] 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 duct sealing gasket installation and positioning device, characterized in that, include: Air duct (1), a flange (2) is installed at the external connection port of the air duct (1), an assembly frame (3) is inserted inside the air duct (1), a connecting frame (4) is installed on the back of the assembly frame (3), and a transmission disc (5) is installed on the front side of the assembly frame (3). The transmission groove (6) is circumferentially opened inside the transmission disc (5). The assembly frame (3) is inserted with a plate (7). The outer end of the plate (7) is connected to a positioning block (8). The positioning block (8) is covered with a sealing gasket (9). A limiting pin (10) is inserted inside the transmission groove (6). The outer end of the limiting pin (10) is connected to the surface of the insert plate (7). A rotating shaft (13) is inserted inside the assembly frame (3). A bearing sleeve (14) is installed at the bottom of the connecting frame (4). A two-way lead screw (15) is inserted inside the bearing sleeve (14). The first bevel tooth (151) is coaxially sleeved on the outer side of the bidirectional lead screw (15), and the second bevel tooth (152) is coaxially mounted on the outer end of the rotating shaft (13) at the position corresponding to the first bevel tooth (151). The first bevel tooth (151) and the second bevel tooth (152) mesh with each other. A slider (16) is screwed onto both sides of the outside of the bidirectional lead screw (15). A screw sleeve (17) is connected to the outside of the slider (16). The screw sleeve (17) is sleeved on the outside of the bidirectional lead screw (15). A locking block (18) is installed at the outer end of the screw sleeve (17).

2. The duct sealing gasket installation and positioning device according to claim 1, characterized in that: The number of transmission grooves (6) and insert plates (7) is at least 3 sets. The outer periphery of the transmission disc (5) is connected to a lever. The limiting pin (10) is a T-shaped rod. The outer diameter of the limiting pin (10) is greater than the width of the transmission groove (6).

3. The duct sealing gasket installation and positioning device according to claim 1, characterized in that: The assembly frame (3) is connected to the assembly set (21) at the outer middle position. The rotating shaft (13) passes through the interior of the assembly set (21). The transmission disk (5) is equipped with a ball bearing (22) at the outer position of the assembly set (21). The transmission disk (5) and the ball bearing (22) are sleeved on the outside of the assembly set (21).

4. The duct sealing gasket installation and positioning device according to claim 1, characterized in that: The operating end of the rotating shaft (13) is coaxially equipped with a handwheel (23), the shape of the locking block (18) is arc-shaped, the outer surface of the locking block (18) is covered with damping pads, and the connection between the connecting frame (4) and the assembly frame (3) is welded with reinforcing ribs.

5. The duct sealing gasket installation and positioning device according to claim 1, characterized in that: The lower part of the connecting frame (4) is connected to the mounting frame (11), and the bottom sides of the mounting frame (11) are connected to the card seats (12), and the card seats (12) are provided with a sliding groove (19) in the middle of their interior.

6. The duct sealing gasket installation and positioning device according to claim 5, characterized in that: The slide groove (19) is equipped with a slide block (20) inside. The slide groove (19) and the slide block (20) are both convex structures. The outer end of the slide block (20) is connected to the corresponding position on the outside of the slider (16).

7. A method of using a duct sealing gasket installation and positioning device, based on the duct sealing gasket installation and positioning device according to any one of claims 1-6, characterized in that, Includes the following steps: S1 assembly rack insertion and alignment: First, insert the assembly frame (3) into the air duct (1), so that the connecting frame (4) extends into the corresponding position of the flange (2) of the external connection port of the air duct (1) along with the assembly frame (3); S2 shaft drive and bevel gear transmission: Next, rotate the operating end of the rotating shaft (13) to drive the second bevel gear (152) coaxially mounted with the rotating shaft (13) to rotate. Through the meshing transmission between the second bevel gear (152) and the first bevel gear (151), the bidirectional screw (15) is driven to rotate inside the bearing sleeve (14). S3 Card Block Expansion and Device Positioning: When the bidirectional screw (15) rotates, the sliders (16) screwed on both sides of its outer side move synchronously in the opposite direction along the axis of the bidirectional screw (15), driving the screw sleeve (17) and the locking block (18) connected to the slider (16) to expand outward synchronously until the locking block (18) tightly abuts against the inner wall of the air duct (1), completing the overall installation and positioning of the device. S4 sealing gasket set and coaxial positioning: After the device is installed and positioned in step S3, the sealing gasket (9) is placed on the outside of the positioning block (8). The outer peripheral lever of the transmission disk (5) is rotated so that the transmission disk (5) rotates around the mounting set (21). During the rotation of the transmission disk (5), the transmission groove (6) opened in the circumferential direction inside it drives the insert plate (7) to expand outward synchronously inside the assembly frame (3) through the limit pin (10), thereby driving the positioning block (8) to open synchronously until the positioning block (8) is tightly attached to the inner wall of the sealing gasket (9), so as to achieve the coaxial positioning of the sealing gasket (9) and the air duct (1). S5 positioning and equipment removal: After the sealing gasket (9) is positioned, it is installed by attaching the adhesive to the flange (2). Then, the shaft (13) is rotated in the opposite direction to make the locking block (18) retract and detach from the inner wall of the air duct (1). The assembly frame (3) is then pulled out to complete the installation and positioning of the sealing gasket (9).

8. The method of using the duct sealing gasket installation and positioning device according to claim 7, characterized in that: In step S1, when inserting the assembly frame (3), the inner wall of the air duct (1) and the contact surface of the flange (2) are cleaned first. That is, the air duct (1) is initially cleaned with a brush, and then the inner wall of the air duct (1) and the contact surface of the flange (2) are wiped with cleaning fluid and cotton cloth.

9. The method of using the duct sealing gasket installation and positioning device according to claim 7, characterized in that: In step S4, before the sealing gasket (9) is placed on the outside of the positioning block (8), the sealing gasket (9) is preheated, that is, the sealing gasket (9) is placed in a constant temperature heating device for heating, and then the side of the sealing gasket (9) that is in contact with the flange (2) is coated with colloid.

10. The method of using the duct sealing gasket installation and positioning device according to claim 7, characterized in that: In step S5, after the assembly frame (3) is pulled out, the inner wall of the air duct (1) and the corresponding position of the card block (18) are wiped, and protective oil is applied to the outer surface of the card block (8).

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