Special-shaped wall surface air pipe mounting device

Abstract

The invention belongs to the technical field of air pipe installation, and particularly relates to a special-shaped wall air pipe installation device which comprises four supporting rods, every two adjacent supporting rods are distributed in a crossed mode, and an adjusting assembly is arranged in the middle of each supporting rod and comprises side grooves formed in the surfaces of the supporting rods. According to the invention, through alternating engagement and disengagement states of the first tooth frame and the toothed plate in the side groove, in the disengagement state, the supporting rod is pulled to move, the intersection point is changed, adjustment is completed, the cooperation of the curved bar on the elastic shaft frame is released, and the first tooth frame is engaged with the toothed plate, so that the intersection point of the frame body can be changed; the problems that in the prior art, in order to cope with the wall face, the length of the frame rod needs to be adjusted according to the structural characteristics of the wall face, the radian of the frame rod needs to be changed to be matched with the radian of the wall face due to the fact that the wall face further has a certain radian, and the installation convenience is affected are solved.

Description

Technical Field

[0001] The invention relates to the technical field of air duct installation, and in particular to a device for installing an air duct on a special-shaped wall. Background Art

[0002] As an industrial ventilation duct, the air duct transports air to the area that needs ventilation, exhaust, supply or return air through equipment such as fans, exhaust fans or supply fans. It is an important part of a series of air engineering projects such as ventilation, exhaust, supply and return air.

[0003] When installing the air duct on the special-shaped wall, compared with the flat wall, the special-shaped wall has protruding or recessed parts and uneven surfaces. In order to cope with the wall, the length of the rack must be adjusted according to its structural characteristics. Some walls also have a certain curvature, so the curvature of the rack needs to be changed to match the curvature of the wall, which affects the convenience of its installation.

[0004] For example: The Chinese invention patent (application number: 202310900637.5) discloses a "ventilation pipe mounting frame". Its specification discloses: At present, the common ventilation pipe mounting frame includes a hanger rod symmetrically fixed on the top of the wall, and an upper clamping rod and a lower clamping rod are set up and down between the hangers. During construction, the lower clamping rod is first removed, and then the ventilation pipe is abutted against the upper clamping rod, and then the lower clamping rod is slid to abut the bottom of the ventilation pipe. There are multiple nuts threaded on the hanger rod, and the nuts are located on the back sides of the upper clamping rod and the lower clamping rod, so that the upper clamping rod and the lower clamping rod clamp the ventilation pipe. However, in the actual installation process, the lower clamping rod needs to keep the action of lifting the ventilation pipe during the installation process until the lower clamping rod is fixed. Therefore, there is still a lot of room for improvement in the convenience of ventilation pipe installation; the above patent can prove the defects of the prior art. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a device for installing a special-shaped wall duct, comprising four support rods, and two adjacent support rods are cross-distributed with each other, an adjustment component is provided in the middle of the support rod, a mounting component is provided above the support rod, a frame component is provided below the support rod, and an alarm component is provided in the frame component; The adjustment component includes a side groove arranged on the surface of the support rod, a tooth plate is provided above the inner wall of the side groove, the tooth plate is meshingly connected with a first tooth rack, and two first tooth racks on the same side are cross-distributed, the other end of the first tooth rack is fixedly connected to an elastic shaft rack, and a curved rod is movably installed between the four elastic shaft racks.

[0007] Preferably, two positioning rings are symmetrically and evenly distributed and fixedly mounted on the outer wall of the curved rod, and the outer wall of the positioning ring is fixedly connected to a shifting rod.

[0008] Preferably, the mounting assembly includes a second gear rack meshingly connected above the gear plate, a side of the second gear rack is movably connected to a side shaft, a torsion spring disk is provided at the other end of the side shaft, and an arc plate is fixedly connected to the side of the torsion spring disk.

[0009] Preferably, an arc-shaped groove is provided on the surface of the arc plate, the inner wall of the arc-shaped groove is movably connected to a limiting shaft, the limiting shaft is fixedly mounted on the surface of the support rod, and one end of the limiting shaft away from the support rod is fixedly connected to the limiting plate.

[0010] Preferably, a hinge is movably installed at the other end of the arc-shaped plate, a positioning plate is installed at the other end of the hinge, and two mounting holes are symmetrically and evenly distributed on the surface of the positioning plate.

[0011] Preferably, the frame assembly includes a third gear rack meshingly connected to the lower portion of the gear plate, an auxiliary shaft is provided on the side of the third gear rack, a connecting rod is movably mounted on the side of the auxiliary shaft, a rotating frame is movably mounted on the other end of the connecting rod, a half-frame plate is movably mounted on the other end of the rotating frame, and a plurality of rubber plates are evenly distributed on the inner frame wall of the half-frame plate.

[0012] Preferably, the upper surface and the lower surface of the half-frame plate are fixedly connected with a mounting plate, and a through hole is provided on the surface of the mounting plate.

[0013] Preferably, a positioning shaft is movably mounted on the side surface of the half frame plate, and the other end of the positioning shaft is movably mounted on the side surface of the support rod.

[0014] Preferably, the alarm assembly includes a plurality of cylinders evenly distributed and fixedly mounted on the outer surface of the half-frame plate, the outer body of the cylinder is provided with oblique holes, the inner frame wall of the half-frame plate is evenly distributed with a plurality of semicircular holes which are on the same horizontal line as the axis of the cylinder, and a conical cover is fixedly connected to one end of the cylinder away from the half-frame plate.

[0015] Preferably, a baffle is provided in the middle of the inner wall of the cylinder, and the baffle is located directly below the oblique hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the scheme of this application: 1. In order to solve the problem in the prior art that, compared with flat walls, special-shaped walls have protruding or recessed parts and uneven surfaces. In order to cope with such walls, it is necessary to adjust the length of the frame rod according to its structural characteristics. In addition, some walls have a certain curvature, so it is necessary to change the curvature of the frame rod to match the curvature of the wall, which affects the convenience of installation. The present application alternately engages and disengages the first tooth rack with the tooth plate in the side groove. In the disengaged state, the support rod is pulled to move, and its intersection point is changed to complete the adjustment, and the coordination of the bent rod in the elastic axis frame is released, and the first tooth rack is engaged with the tooth plate, thereby changing the intersection point of the frame body, and creating a difference in the length of the two sets of frames, thereby adapting to walls of different angles.

[0017] 2. By moving the arc plate, with the cooperation of the torsion spring disc, the second tooth frame is separated from the tooth plate, and then the arc plate is pushed to move along the arc groove and the limit axis, so that the length of the rack rod can be extended and adjusted, and the angle of the rack rod can be compensated, thereby improving its fit with the special-shaped wall.

[0018] 3. By moving the position of the third gear rack in the gear plate, since the length of the connecting rod and the distance between the rotating frame and the positioning axis are fixed values, after changing the position of the third gear rack, the angle between the half frame plate and the support rod will be changed, so that the angle of the duct installation frame can be flexibly adjusted to meet the needs of its installation on different walls.

[0019] 4. During the process of adjusting the intersection position of the support rods, the tooth plate cooperates with the first tooth rack to change the intersection position between the two adjacent support rods to adapt to walls with different angles. During the positioning and installation process, the tooth plate cooperates with the first tooth rack to compensate for the angle between the support rod and the arc plate, thereby extending and adjusting the length of the rack rod and compensating the angle of the rack rod to improve its fit with the special-shaped wall. During the installation of the air duct, the tooth plate cooperates with the third tooth rack to change the angle between the frame and the support rod to adapt to the positioning and installation of the air duct at different angles, so that the tooth plate can flexibly switch between the intersection point adjustment state, the angle compensation state and the slope control state, thereby improving the convenience of installing the air duct on the special-shaped wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 The overall structure of the special-shaped wall duct installation device provided in this application is shown in FIG. Figure 1 ; Figure 2 The overall structure of the special-shaped wall duct installation device provided in this application is shown in FIG. Figure 2 ; Figure 3 The overall structure of the special-shaped wall duct installation device provided in this application is shown in FIG. Figure 3 ; Figure 4 Schematic diagram of the structure of the adjustment component and the installation component in the special-shaped wall duct installation device provided in this application Figure 1 ; Figure 5 Schematic diagram of the structure of the adjustment component and the installation component in the special-shaped wall duct installation device provided in this application Figure 2 ; Figure 6 A schematic diagram of the partial structure of the adjustment component in the special-shaped wall duct installation device provided in this application; Figure 7 A schematic diagram of the structure of the frame assembly in the special-shaped wall duct installation device provided in this application; Figure 8 Schematic diagram of the partial structure of the frame assembly in the special-shaped wall duct installation device provided in this application Figure 1 ; Fig. 9 Schematic diagram of the partial structure of the frame assembly in the special-shaped wall duct installation device provided in this application Figure 2 ; Fig.10 This is a schematic diagram of the structure of the cylinder in the special-shaped wall air duct installation device provided in this application.

[0022] Indicated in the figure: 1. Support rod; 2. Adjustment assembly; 201. Side groove; 202. Tooth plate; 203. First tooth rack; 204. Positioning ring; 205. Bending rod; 206. Push rod; 207. Elastic shaft rack; 3. Mounting assembly; 301. Second gear rack; 302. Side shaft; 303. Torsion spring disc; 304. Arc plate; 305. Limiting shaft; 306. Arc groove; 307. Limiting plate; 4. Hinge; 5. Positioning plate; 6. Mounting hole; 7. Frame assembly; 701. Third gear rack; 702. Auxiliary shaft; 703. Connecting rod; 704. Rotating frame; 705. Half frame plate; 706. Positioning shaft; 707. Mounting plate; 708. Rubber plate; 8. Alarm assembly; 801. Cylinder; 802. Semicircular hole; 803. Conical cover; 804. Oblique hole; 805. Baffle. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-10 , the present invention provides a technical solution: like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, a special-shaped wall duct installation device according to an embodiment of the present invention comprises four support rods 1, and two adjacent support rods 1 are cross-distributed with each other, an adjustment component 2 is provided in the middle of the support rod 1, a mounting component 3 is provided above the support rod 1, a frame component 7 is provided below the support rod 1, and an alarm component 8 is provided in the frame component 7; The adjusting component 2 includes a side groove 201 arranged on the surface of the support rod 1, and a tooth plate 202 is arranged on the upper inner wall of the side groove 201. The tooth plate 202 is meshedly connected with the first tooth rack 203, and the two first tooth racks 203 on the same side are cross-distributed, and the other end of the first tooth rack 203 is fixedly connected with an elastic shaft frame 207, and a curved rod 205 is movably installed between the four elastic shaft frames 207. The curved rod 205 is moved to rotate, and during the deflection to one side, the lever 206 connected to the positioning ring 204 will be driven to follow the movement to push the first tooth rack 203. With the cooperation of the elastic shaft frame 207, the first tooth rack 203 will move away from the tooth plate 202 in the side groove 201. At this time, the support rod 1 separated from the first tooth rack 203 can be pulled to move to change the intersection point of the two support rods 1, so as to adapt to the walls with different protruding angles.

[0025] By alternating the engagement and disengagement states of the first tooth rack 203 and the tooth plate 202 in the side groove 201, in the disengaged state, the support rod 1 is pulled to move, and its intersection point is changed to complete the adjustment, and the cooperation of the bent rod 205 on the elastic shaft frame 207 is released, and the first tooth rack 203 is engaged with the tooth plate 202, thereby changing the intersection point of the frame body, and creating a difference in the length of the two sets of frames, so as to adapt to walls at different angles.

[0026] like Figure 6 As shown, two positioning rings 204 are symmetrically and evenly distributed and fixedly installed on the outer wall of the curved rod 205, and the outer wall of the positioning ring 204 is fixedly connected to the shifting rod 206.

[0027] Specifically, the lever 206 connected to the positioning rod moves along with the movement driven by the curved rod 205, and the first tooth rack 203 meshed with the tooth plate 202 is shifted to disengage, thereby facilitating synchronous adjustment of the rack rod length on the same side.

[0028] Example:

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, compared with Example 1, another implementation manner of the present invention is: the mounting assembly 3 includes a second tooth rack 301 meshingly connected to the tooth plate 202, and the side shaft 302 is movably connected to the side of the second tooth rack 301, and the other end of the side shaft 302 is provided with a torsion spring disk 303, and the side of the torsion spring disk 303 is fixedly connected to the arc plate 304. After the length adjustment of the frame body is completed, the arc plate 304 is moved with the cooperation of the torsion spring disk 303, and the arc plate 304 drives the second tooth rack 301 to disengage from the tooth plate 202, and then pushes the arc plate 304 to move, and with the cooperation of the limit shaft 305, it moves along the angle of the arc groove 306, while extending the length of the support rod 1, it can also further compensate for the angle of the support rod 1. After completion, the arc plate 304 is released, and driven by the torsion spring disk 303, the second tooth rack 301 is re-engaged with the tooth plate 202.

[0030] Beneficial effect: by moving the arc plate 304, with the cooperation of the torsion spring disk 303, the second tooth frame 301 is separated from the tooth plate 202, and then the arc plate 304 is pushed to move along the arc groove 306 and the limit shaft 305, so that the length of the frame rod can be extended and adjusted, and the angle of the frame rod can be compensated, thereby improving its fit with the special-shaped wall.

[0031] like Figure 3 , Figure 4 and Figure 5 As shown, an arc groove 306 is provided on the surface of the arc plate 304, and the inner wall of the arc groove 306 is movably connected to a limiting shaft 305, which is fixedly installed on the surface of the support rod 1, and the limiting shaft 305 is fixedly connected to a limiting plate 307 at one end away from the support rod 1.

[0032] Specifically, the limiting shaft 305 cooperates with the arc groove 306 of the arc plate 304 , so as to facilitate adjusting the angle between the arc plate 304 and the support rod 1 .

[0033] like Figure 1 As shown, a hinge 4 is movably installed at the other end of the arc plate 304, and a positioning plate 5 is installed at the other end of the hinge 4. Two mounting holes 6 are symmetrically and evenly distributed on the surface of the positioning plate 5.

[0034] Specifically, the positioning plate 5 connected by the hinge 4 is installed in close contact with the wall surface and is positioned by bolts.

[0035] Example:

[0036] like Figure 1 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Fig. 9 As shown, comparing Example 1 with Example 2, another embodiment of the present invention is as follows: the frame assembly 7 includes a third gear rack 701 meshingly connected to the lower portion of the gear plate 202, an auxiliary shaft 702 is provided on the side of the third gear rack 701, a connecting rod 703 is movably mounted on the side of the auxiliary shaft 702, a rotating frame 704 is movably mounted on the other end of the connecting rod 703, a half-frame plate 705 is movably mounted on the other end of the rotating frame 704, and a plurality of rubber plates 708 are evenly distributed on the inner frame wall of the half-frame plate 705, which connect the third gear rack 701 to the auxiliary shaft 702. 02, disengage from the tooth plate 202, and then move the third tooth rack 701 in the side groove 201. Since the length of the connecting rod 703 is fixed, with the cooperation of the rotating frame 704, the half-frame plate 705 is pulled to move, and the side of the half-frame plate 705 is connected by the positioning shaft 706. Then the half-frame plate 705 rotates with the positioning shaft 706 to change the installation angle of the half-frame plate 705 to the air duct. After completion, the third tooth rack 701 is meshed with the tooth plate 202 to position the adjusted angle.

[0037] Beneficial effect: By moving the position of the third gear rack 701 in the gear plate 202, since the length of the connecting rod 703 and the distance between the rotating frame 704 and the positioning axis 706 are fixed values, after changing the position of the third gear rack 701, the angle between the half-frame plate 705 and the support rod 1 will be changed, so that the angle of the air duct installation frame can be flexibly adjusted to meet the needs of its installation on different wall surfaces.

[0038] like Figure 8 and Fig. 9 As shown, the upper surface and the lower surface of the half frame plate 705 are fixedly connected with a mounting plate 707, and a through hole is provided on the surface of the mounting plate 707.

[0039] Specifically, two opposite half-frame plates 705 are connected by means of the mounting plate 707, and bolts are passed through the through holes thereof to lock the two half-frame plates 705 on the outer wall of the air duct, thereby fixing the air duct.

[0040] like Figure 4 and Figure 5 As shown, a positioning shaft 706 is movably mounted on the side of the half frame plate 705 , and the other end of the positioning shaft 706 is movably mounted on the side of the support rod 1 .

[0041] Specifically, the half frame plate 705 is connected to the support rod 1 through the positioning shaft 706, so that the half frame plate 705 is rotated about the positioning shaft 706 to change its angle.

[0042] Example:

[0043] like Figure 1 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, by comparing the first embodiment, the second embodiment and the third embodiment, another embodiment of the present invention is as follows: the alarm assembly 8 includes a plurality of cylinders 801 evenly distributed and fixedly mounted on the outer surface of the half-frame plate 705, the cylinder 801 is provided with oblique holes 804 on the outside, the inner wall of the half-frame plate 705 is evenly distributed with a plurality of semicircular holes 802, and the semicircular holes 802 are on the same horizontal line as the axis of the cylinder 801, the cylinder 801 is fixedly connected with a conical cover 803 at one end away from the half-frame plate 705, and the two half-frame plates 705 are spliced ​​and mounted on the outer wall of the air duct, At the connection point of the two sections of the air duct, multiple rubber plates 708 in the inner wall of the half-frame plate 705 divide the gap between the half-frame plate 705 and the air duct into several spaces. When one of the connections of the air duct is damaged, the airflow flowing in the air duct will pass through the damaged part and enter the separated spaces. As the airflow enters, it passes through the semicircular hole 802 and enters the cylinder 801, hits the baffle 805, and is discharged from the oblique hole 804 on the outer wall of the cylinder 801, generating air vibration and resonance to make a sound, thereby realizing a damage alarm.

[0044] Beneficial effect: The air duct connection is spliced ​​and fixed by two half-frame plates 705, and the rubber plate 708 installed in the half-frame plate 705 divides the space between the air duct connection and the half-frame plate 705 into several spaces. When the air duct connection in the space is damaged, the air flow passes through the cylinder 801 on the outer wall of the half-frame plate 705 through the semicircular hole 802, hits the baffle 805 and is discharged from the oblique hole 804, generating air vibration and resonance to make a sound, thereby monitoring the damage of the air duct connection in the frame joint, making a sound so that the damaged part of the air duct can be quickly detected, thereby improving the convenience of its maintenance and inspection.

[0045] like Fig.10 As shown, a baffle 805 is provided in the middle of the inner wall of the cylinder 801 , and the baffle 805 is located directly below the oblique hole 804 .

[0046] Specifically, the baffle 805 cooperates with the oblique hole 804 so that the airflow hits the baffle 805 and is then led out from the oblique hole 804, thereby generating air vibration and resonance to produce a sound.

[0047] Working Principle: After placing the overall structure in the appropriate position, the staff will adjust its overall structure; Cross point control: The staff member turns the crank 205 to make the crank 205 rotate. During the deflection to one side, the lever 206 connected to the positioning ring 204 will follow the movement to push the first gear rack 203. With the cooperation of the elastic shaft frame 207, the first gear rack 203 will be away from the tooth plate 202 in the side groove 201. At this time, the support rod 1 separated from the first gear rack 203 can be pulled to move, so as to change the intersection point of the two support rods 1, so as to adapt to the wall with different protruding angles; Rack rod compensation: After the length adjustment of the rack body is completed, the arc plate 304 is moved with the cooperation of the torsion spring disk 303, and the arc plate 304 drives the second rack 301 to disengage from the tooth plate 202, and then pushes the arc plate 304 to move, and with the cooperation of the limit shaft 305, it moves along the angle of the arc groove 306, while extending the length of the support rod 1, it can also further compensate for the angle of the support rod 1. After completion, the arc plate 304 is released, and driven by the torsion spring disk 303, the second rack 301 is meshed with the tooth plate 202 again; Frame inclination adjustment: the third gear rack 701 is separated from the tooth plate 202 with the cooperation of the auxiliary shaft 702, and then the third gear rack 701 is moved in the side groove 201. Since the length of the connecting rod 703 is fixed, with the cooperation of the rotating frame 704, the half frame plate 705 is pulled to move, and the side of the half frame plate 705 is connected by the positioning shaft 706. Then the half frame plate 705 is rotated with the positioning shaft 706 to change the installation angle of the half frame plate 705 to the air duct. After completion, the third gear rack 701 is meshed with the tooth plate 202 to position the adjusted angle; Damage monitoring: The two half-frame plates 705 are spliced ​​and installed on the outer wall of the air duct and are located at the connection between the two sections of the air duct. The multiple rubber plates 708 in the inner wall of the half-frame plate 705 divide the gap between the half-frame plate 705 and the air duct into several spaces. When one of the connections of the air duct is damaged, the airflow flowing in the air duct passes through the damaged part and enters the space divided by it. As the airflow enters, it passes through the semicircular hole 802 and enters the cylinder 801, hits the baffle plate 805 and enters, and is led out from the oblique hole 804 on the outer wall of the cylinder 801, generating air vibration and resonance to make a sound, thereby realizing a damage alarm. After the clamping installation is completed, the positioning plate 5 connected by the hinge 4 is installed in a fit with the wall and positioned by bolts.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for installing an air duct on a special-shaped wall, characterized in that: It comprises four support rods (1), and two adjacent support rods (1) are arranged crosswise with each other, an adjustment component (2) is provided in the middle of the support rod (1), a mounting component (3) is provided above the support rod (1), a frame component (7) is provided below the support rod (1), and an alarm component (8) is provided in the frame component (7); The adjustment component (2) comprises a side groove (201) provided on the surface of the support rod (1), a tooth plate (202) is provided above the inner wall of the side groove (201), the tooth plate (202) is meshingly connected with a first tooth frame (203), and two first tooth frames (203) on the same side are cross-distributed, the other end of the first tooth frame (203) is fixedly connected with an elastic shaft frame (207), and a curved rod (205) is movably installed between the four elastic shaft frames (207); Two positioning rings (204) are fixedly mounted on the outer wall of the curved rod (205) in a symmetrical and evenly distributed manner, and a shifting rod (206) is fixedly connected to the outer wall of the positioning ring (204); The mounting assembly (3) comprises a second tooth frame (301) meshingly connected to the tooth plate (202), a side shaft (302) being movably connected to the side of the second tooth frame (301), a torsion spring disk (303) being provided at the other end of the side shaft (302), and a curved plate (304) being fixedly connected to the side of the torsion spring disk (303).

2. The device for installing an air duct on a special-shaped wall according to claim 1, characterized in that: An arc-shaped groove (306) is provided on the surface of the arc-shaped plate (304); the inner wall of the arc-shaped groove (306) is movably connected to a limit shaft (305); the limit shaft (305) is fixedly mounted on the surface of the support rod (1); and one end of the limit shaft (305) away from the support rod (1) is fixedly connected to a limit plate (307).

3. The device for installing an air duct on a special-shaped wall according to claim 1, characterized in that: A hinge (4) is movably mounted on the other end of the arc-shaped plate (304), a positioning plate (5) is mounted on the other end of the hinge (4), and two mounting holes (6) are symmetrically and evenly distributed on the surface of the positioning plate (5).

4. The device for installing an air duct on a special-shaped wall according to claim 1, characterized in that: The frame assembly (7) comprises a third tooth rack (701) meshingly connected to the lower side of the tooth plate (202); an auxiliary shaft (702) is provided on the side of the third tooth rack (701); a connecting rod (703) is movably mounted on the side of the auxiliary shaft (702); a rotating frame (704) is movably mounted on the other end of the connecting rod (703); a half-frame plate (705) is movably mounted on the other end of the rotating frame (704); and a plurality of rubber plates (708) are evenly distributed on the inner frame wall of the half-frame plate (705).

5. The device for installing an air duct on a special-shaped wall according to claim 4, characterized in that: The upper surface and the lower surface of the half frame plate (705) are both fixedly connected to a mounting plate (707), and a through hole is provided on the surface of the mounting plate (707).

6. The device for installing an air duct on a special-shaped wall according to claim 4, characterized in that: A positioning shaft (706) is movably mounted on the side of the half frame plate (705), and the other end of the positioning shaft (706) is movably mounted on the side of the support rod (1).

7. The device for installing an air duct on a special-shaped wall according to claim 1, characterized in that: The alarm assembly (8) comprises a plurality of cylinders (801) evenly distributed and fixedly mounted on the outer surface of a half-frame plate (705); an oblique hole (804) is provided on the outside of the cylinder (801); a plurality of semicircular holes (802) are evenly distributed on the inner frame wall of the half-frame plate (705) and are on the same horizontal line as the axis of the cylinder (801); and a conical cover (803) is fixedly connected to one end of the cylinder (801) away from the half-frame plate (705).

8. The device for installing an air duct on a special-shaped wall according to claim 7, characterized in that: A baffle (805) is provided in the middle of the inner wall of the cylinder (801), and the baffle (805) is located directly below the oblique hole (804).

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