A special-shaped wall surface air pipe mounting device

Abstract

The application 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, adjacent two supporting rods are cross-distributed, an adjusting assembly is arranged in the middle of the supporting rod, and the adjusting assembly comprises a side groove arranged on the surface of the supporting rod. The first toothed rack and the toothed plate in the side groove are alternately engaged and disengaged. In the disengaged state, the supporting rod is pulled to move, the intersection point is changed, the adjusting is completed, the curved rod is released in cooperation with the elastic shaft frame, the first toothed rack is engaged with the toothed plate, the intersection point of the frame body can be changed, the length difference between the two groups of frame bodies is generated, the length of the frame rod needs to be adjusted according to the structural characteristics of the wall in the prior art to cope with the wall, there is a certain arc on the wall, the arc of the frame rod needs to be changed to match the arc of the wall, and the problem of affecting the installation convenience is solved.

Description

Technical Field

[0001] This invention relates to the field of duct installation technology, and more specifically, to a duct installation device for irregularly shaped walls. Background Technology

[0002] Air ducts, as a type of industrial ventilation system, use equipment such as fans, exhaust fans, or supply fans to transport air to areas requiring ventilation, exhaust, supply, or return air. They are an important component of air engineering systems that achieve ventilation, exhaust, supply, and return air functions.

[0003] When installing ducts on irregularly shaped walls, the irregular walls have protruding or recessed parts and uneven surfaces compared to flat walls. In order to cope with such walls, the length of the support rods needs to be adjusted according to their structural characteristics. In addition, some walls also have a certain curvature, so the curvature of the support rods needs to be changed to match the curvature of the wall, which affects the ease of installation.

[0004] For example, the Chinese invention patent (application number: 202310900637.5) discloses a "ventilation duct mounting bracket," the description of which states that common ventilation duct mounting brackets include symmetrically fixed hangers on the top of the wall, with upper and lower clamping rods sliding vertically between the hangers. During construction, the lower clamping rod is first removed, then the ventilation duct is placed against the upper clamping rod, and finally the lower clamping rod is slidably placed against the bottom of the ventilation duct. Multiple nuts are threaded onto the hangers, located on opposite sides of the upper and lower clamping rods, allowing them to clamp the ventilation duct. However, in actual installation, the lower clamping rod needs to continuously support the ventilation duct until it is fixed, thus there is significant room for improvement in terms of ease of ventilation duct installation; the aforementioned patent demonstrates the deficiencies of the existing technology. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: an irregular wall duct installation device, including four support rods, with adjacent support rods intersecting each other, an adjustment component in the middle of the support rod, an installation component above the support rod, a frame component below the support rod, and an alarm component in the frame component;

[0007] The adjustment assembly includes a side groove on the surface of the support rod, a toothed plate on the upper part of the inner wall of the side groove, a first toothed frame meshing with the toothed plate, and two first toothed frames on the same side are distributed in a cross pattern. An elastic shaft is fixedly connected to the other end of the first toothed frame, and a crank is movably installed between the four elastic shafts.

[0008] Preferably, two positioning rings are symmetrically and evenly distributed and fixedly installed on the outer wall of the crank, and a lever is fixedly connected to the outer wall of the positioning ring.

[0009] Preferably, the mounting assembly includes a second gear frame meshing with the toothed plate above it, a side shaft movably connected to the side of the second gear frame, a torsion spring disc at the other end of the side shaft, and an arc-shaped plate fixedly connected to the side of the torsion spring disc.

[0010] Preferably, the surface of the arc-shaped plate is provided with an arc-shaped groove, and a limiting shaft is movably connected to the inner wall of the arc-shaped groove. The limiting shaft is fixedly installed on the surface of the support rod, and a limiting plate is fixedly connected to the end of the limiting shaft away from the support rod.

[0011] Preferably, a hinge is movably mounted on the other end of the arc-shaped plate, and a positioning plate is mounted on the other end of the hinge. The positioning plate has two mounting holes symmetrically and evenly distributed on its surface.

[0012] Preferably, the frame assembly includes a third gear frame meshing with the toothed plate below it. The third gear frame has an auxiliary shaft on its side, 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, and a half-frame plate is movably mounted on the other end of the rotating frame. The inner frame wall of the half-frame plate is provided with a plurality of rubber plates evenly distributed.

[0013] Preferably, the upper and lower surfaces of the semi-frame plate are fixedly connected to mounting plates, and through holes are formed on the surface of the mounting plates.

[0014] Preferably, a positioning shaft is movably mounted on the side of the semi-frame plate, and the other end of the positioning shaft is movably mounted on the side of the support rod.

[0015] Preferably, the alarm component includes several cylinders that are evenly distributed and fixedly installed on the outer surface of the half-frame plate. The cylinders are provided with oblique holes on their outer surfaces. The inner frame wall of the half-frame plate is provided with several semi-circular holes that are evenly distributed and are at the same horizontal level as the axis of the cylinders. A conical cap is fixedly connected to the end of the cylinder away from the half-frame plate.

[0016] 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.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] In the scheme of this application:

[0019] 1. To address the issue in existing technologies where irregularly shaped walls, compared to flat walls, have protruding or recessed sections and uneven surfaces, requiring adjustments to the length of the support rods based on the wall's structural characteristics, and further compromising installation convenience due to the curvature of some walls, this application addresses this problem by alternating the engagement and disengagement states of the first toothed frame and the toothed plate in the side groove. In the disengaged state, the support rod is pulled to move, changing its intersection point and completing the adjustment. Releasing the crank rod from the elastic shaft, the first toothed frame engages with the toothed plate, thereby changing the intersection point of the frame and creating a difference in length between the two sets of frames to adapt to walls with different angles.

[0020] 2. By moving the arc-shaped plate, the second toothed frame disengages from the toothed plate in cooperation with the torsion spring plate. Then, by pushing the arc-shaped plate, the arc-shaped plate moves along the arc groove and the limiting shaft, thereby extending and adjusting the length of the support rod and compensating for the angle of the support rod, thus improving its fit with irregular wall surfaces.

[0021] 3. By moving the position of the third toothed frame in the toothed plate, since the length of the connecting rod and the distance between the rotating frame and the positioning shaft are fixed values, changing the position of the third toothed frame will change the angle between the half-frame plate and the support rod, thereby enabling flexible adjustment of the angle of the duct installation frame to adapt to the needs of installation on different walls.

[0022] 4. During the adjustment of the cross-point position of the support rods, the toothed plate and the first toothed frame cooperate to change the cross-point position between two adjacent support rods to adapt to different wall angles. During the positioning and installation process, the toothed plate and the first toothed frame cooperate to compensate for the angle between the support rod and the curved plate, thereby extending and adjusting the length of the support rod and compensating for its angle to improve its fit with irregular wall surfaces. During the duct installation process, the toothed plate and the third toothed frame cooperate to change the angle between its frame and the support rod, thereby adapting to the positioning and installation of the duct at different angles. This allows the toothed plate to flexibly switch between cross-point adjustment, angle compensation, and slope control states, improving the convenience of duct installation on irregular wall surfaces. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 Schematic diagram of the overall structure of the irregular wall duct installation device provided in this application Figure 1 ;

[0025] Figure 2 Schematic diagram of the overall structure of the irregular wall duct installation device provided in this application Figure 2 ;

[0026] Figure 3 Schematic diagram of the overall structure of the irregular wall duct installation device provided in this application Figure 3 ;

[0027] Figure 4 Schematic diagram of the adjustment component and installation component in the irregular wall duct installation device provided in this application Figure 1 ;

[0028] Figure 5 Schematic diagram of the adjustment component and installation component in the irregular wall duct installation device provided in this application Figure 2 ;

[0029] Figure 6 A partial structural diagram of the adjustment component in the irregular wall duct installation device provided in this application;

[0030] Figure 7 A structural schematic diagram of the frame assembly in the irregular wall duct installation device provided in this application;

[0031] Figure 8 A partial structural diagram of the frame assembly in the irregular wall duct installation device provided in this application. Figure 1 ;

[0032] Figure 9 A partial structural diagram of the frame assembly in the irregular wall duct installation device provided in this application. Figure 2 ;

[0033] Figure 10 A schematic diagram of the cylindrical body in the irregular wall duct installation device provided in this application.

[0034] The image shows:

[0035] 1. Support rod;

[0036] 2. Adjustment assembly; 201. Side groove; 202. Gear plate; 203. First gear frame; 204. Positioning ring; 205. Crank rod; 206. Lever; 207. Elastic shaft frame;

[0037] 3. Installation components; 301. Second gear; 302. Side shaft; 303. Torsion spring disc; 304. Arc plate; 305. Limiting shaft; 306. Arc groove; 307. Limiting plate;

[0038] 4. Hinges; 5. Positioning plate; 6. Mounting holes;

[0039] 7. Frame assembly; 701. Third gear; 702. Auxiliary shaft; 703. Connecting rod; 704. Rotating frame; 705. Half-frame plate; 706. Positioning shaft; 707. Mounting plate; 708. Rubber plate;

[0040] 8. Alarm assembly; 801. Cylinder; 802. Semicircular hole; 803. Conical cover; 804. Slanted hole; 805. Baffle. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0042] Please see Figure 1-10 The present invention provides a technical solution:

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown in the figure, the irregular wall duct installation device of the present invention includes four support rods 1, and the adjacent two support rods 1 are distributed in a crisscross manner. An adjustment component 2 is provided in the middle of the support rod 1, an installation 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.

[0044] The adjustment assembly 2 includes a side groove 201 on the surface of the support rod 1. A toothed plate 202 is provided on the upper part of the inner wall of the side groove 201. The toothed plate 202 is engaged with a first toothed frame 203, and two first toothed frames 203 on the same side are distributed in a cross pattern. The other end of the first toothed frame 203 is fixedly connected to an elastic shaft frame 207. A crank 205 is movably installed between the four elastic shaft frames 207. When the crank 205 is turned, it rotates and deflects to one side, which drives the lever 206 connected to the positioning ring 204 to follow the movement and push the first toothed frame 203. With the cooperation of the elastic shaft frame 207, the first toothed frame 203 moves away from the toothed plate 202 in the side groove 201. At this time, the support rod 1 that is detached from the first toothed frame 203 can be pulled to move, thereby changing the intersection point of the two support rods 1 to adapt to the wall with different protrusion angles.

[0045] By alternating between the engagement and disengagement states of the first gear frame 203 and the toothed plate 202 in the side groove 201, in the disengaged state, the support rod 1 is pulled to move, thereby changing its intersection point and completing the adjustment. The engagement of the crank rod 205 with the elastic shaft frame 207 is released, and the first gear frame 203 engages with the toothed plate 202, thereby changing the intersection point of the frame and creating a difference in the length of the two sets of frames to adapt to walls at different angles.

[0046] like Figure 6 As shown, two positioning rings 204 are symmetrically and evenly distributed and fixedly installed on the outer wall of the crank 205, and a lever 206 is fixedly connected to the outer wall of the positioning ring 204.

[0047] Specifically, the lever 206 connected to the positioning rod moves along with the crank 205, thereby disengaging the first gear 203 that meshes with the gear plate 202, thus facilitating the synchronous adjustment of the length of the frame rod on the same side.

[0048] Example:

[0049] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: The mounting component 3 includes a second gear frame 301 meshing with the toothed plate 202. A side shaft 302 is movably connected to the side of the second gear frame 301. A torsion spring disk 303 is provided at the other end of the side shaft 302. An arc plate 304 is fixedly connected to the side of the torsion spring disk 303. After the length of the frame is adjusted, the arc plate 304 is moved with the cooperation of the torsion spring disk 303. The arc plate 304 then drives the second gear frame 301 to disengage from the toothed plate 202 and pushes the arc plate 304 to move. With the cooperation of the limiting shaft 305, it moves along the angle of the arc groove 306. While extending the length of the support rod 1, the angle of the support rod 1 can also be further compensated. After completion, the arc plate 304 is released. Under the drive of the torsion spring disk 303, the second gear frame 301 re-meshes with the toothed plate 202.

[0050] Beneficial effects: By moving the arc plate 304, with the cooperation of the torsion spring plate 303, its second tooth frame 301 disengages from the tooth plate 202. Then, by pushing the arc plate 304, the arc plate 304 moves along the arc groove 306 and the limiting shaft 305, thereby extending and adjusting the length of the support rod and compensating for the angle of the support rod, thus improving its fit with irregular wall surfaces.

[0051] like Figure 3 , Figure 4 and Figure 5As shown, the surface of the arc plate 304 is provided with an arc groove 306, and the inner wall of the arc groove 306 is movably connected to a limiting shaft 305. The limiting shaft 305 is fixedly installed on the surface of the support rod 1, and the end of the limiting shaft 305 away from the support rod 1 is fixedly connected to a limiting plate 307.

[0052] Specifically, the limiting shaft 305 cooperates with the arc groove 306 of the arc plate 304 to facilitate the adjustment of the angle between the arc plate 304 and the support rod 1.

[0053] 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.

[0054] Specifically, the positioning plate 5 connected by the hinge 4 is fitted to the wall and positioned by bolts.

[0055] Example:

[0056] like Figure 1 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 9 As shown, comparing Embodiment 1 and Embodiment 2, another embodiment of the present invention is as follows: the frame assembly 7 includes a third gear frame 701 meshing with the toothed plate 202 below. An auxiliary shaft 702 is provided on the side of the third gear frame 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 semi-frame plate 705 is movably mounted on the other end of the rotating frame 704. A plurality of rubber plates 708 are evenly distributed on the inner frame wall of the semi-frame plate 705, which holds the third gear frame 701 on the auxiliary shaft 702. With the cooperation of 02, the third gear 701 is disengaged from the toothed plate 202 and then moved to the position of the third gear 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. 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, thereby changing the angle of the half frame plate 705 relative to the air duct installation. After completion, the third gear 701 is engaged with the toothed plate 202 to position the adjusted angle.

[0057] Beneficial effects: By moving the position of the third gear 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 shaft 706 are fixed values, changing the position of the third gear 701 will change the angle between the half frame plate 705 and the support rod 1, thereby enabling flexible adjustment of the angle of the duct installation frame to adapt to the needs of installation on different walls.

[0058] like Figure 8 and Figure 9 As shown, mounting plates 707 are fixedly connected to both the upper and lower surfaces of the semi-frame plate 705, and through holes are opened on the surface of the mounting plate 707.

[0059] Specifically, the two opposing half-frame plates 705 are connected by the mounting plate 707, and bolts are passed through its through holes to lock the two half-frame plates 705 to the outer wall of the duct, thereby fixing the duct.

[0060] 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.

[0061] Specifically, the half-frame plate 705 is connected to the support rod 1 by the positioning shaft 706, so that the half-frame plate 705 can rotate around the positioning shaft 706 and change its angle.

[0062] Example:

[0063] like Figure 1 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, comparing Embodiment 1, Embodiment 2, and Embodiment 3, another embodiment of the present invention is as follows: The alarm component 8 includes a plurality of cylindrical bodies 801 uniformly distributed and fixedly installed on the outer surface of the semi-frame plate 705. The cylindrical bodies 801 have oblique holes 804 on their outer surfaces. The inner frame wall of the semi-frame plate 705 has a plurality of semi-circular holes 802 uniformly distributed and positioned at the same horizontal level as the axis of the cylindrical bodies 801. A conical cap 803 is fixedly connected to the end of the cylindrical body 801 away from the semi-frame plate 705. The two semi-frame plates 705 are spliced ​​together and installed on the outer wall of the air duct. Furthermore, at the connection point of the two duct sections, 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 duct into several spaces. When a break occurs at one of the duct connection points, the airflow flowing in the duct passes through the break and enters the space it is divided into. As the airflow enters, it passes through the semi-circular hole 802 and enters the cylinder 801, impacts the baffle 805, and is discharged through the oblique hole 804 on the outer wall of the cylinder 801, thus generating air vibration and resonance to produce a sound, thereby realizing a damage alarm.

[0064] Beneficial effects: The 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 duct connection and the half-frame plate 705 into several spaces. When the duct connection in the space is damaged, the airflow passes through the cylinder 801 on the outer wall of the half-frame plate 705 through the semi-circular hole 802, hits the baffle 805 and is discharged through the oblique hole 804, generating air vibration and resonance to produce a sound. This allows for monitoring of damage to the duct connection in the frame splicing, and the sound can quickly detect the damage to the duct, improving the convenience of maintenance and repair.

[0065] like Figure 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.

[0066] Specifically, the baffle 805 and the oblique hole 804 work together so that the airflow hits the baffle 805 and is then discharged through the oblique hole 804, thus generating air vibration and resonance to produce a sound.

[0067] Working principle: After the staff places the overall structure in the appropriate position, they adjust the overall structure.

[0068] Cross-point adjustment: When the operator moves the crank 205, the crank 205 rotates and deflects to one side, which will drive the lever 206 connected to the positioning ring 204 to move accordingly, pushing the first gear 203. With the cooperation of the elastic shaft 207, the first gear 203 moves away from the tooth plate 202 in the side groove 201. At this time, the support rod 1 that is separated from the first gear 203 can be pulled to move, so as to change the intersection point of the two support rods 1, thereby adapting to the wall with different protrusion angles.

[0069] Frame compensation: After the length of the frame is adjusted, the arc plate 304 is moved with the help of the torsion spring plate 303. The arc plate 304 then drives the second gear 301 to disengage from the gear plate 202, and pushes the arc plate 304 to move. With the help 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 the second gear 301 re-engages with the gear plate 202 with the help of the torsion spring plate 303.

[0070] Frame tilt adjustment: The third gear 701, with the cooperation of the auxiliary shaft 702, disengages from the gear plate 202, and then moves the position of the third gear 701 in the side groove 201. Since the length of the connecting rod 703 is fixed, with the cooperation of the rotating frame 704, it pulls the half frame plate 705 to move. 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, thereby changing the angle of the half frame plate 705 relative to the air duct installation. After completion, the third gear 701 is engaged with the gear plate 202 to position the adjusted angle.

[0071] Damage monitoring: The two half-frame plates 705 are spliced ​​together and installed on the outer wall of the air duct, and are located at the connection of the two sections of 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 a break occurs at one of the air duct connections, the airflow in the air duct passes through the break and enters the space it is divided into. As the airflow enters, it passes through the semi-circular hole 802 and enters the cylinder 801, hits the baffle 805 and enters, and is discharged through the oblique hole 804 on the outer wall of the cylinder 801, which generates air vibration and resonance and produces a sound, thus realizing the damage alarm. After the clamping installation is completed, the positioning plate 5 connected by the hinge 4 is attached to the wall and positioned by bolts.

[0072] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for installing ductwork on irregularly shaped walls, characterized in that, It includes four support rods (1), and the two adjacent support rods (1) are distributed in a crisscross pattern. An adjustment component (2) is provided in the middle of the support rod (1), an installation 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) includes a side groove (201) on the surface of the support rod (1). A toothed plate (202) is provided above the inner wall of the side groove (201). The toothed plate (202) is meshed with a first toothed frame (203). Two first toothed frames (203) on the same side are distributed in a cross pattern. An elastic shaft frame (207) is fixedly connected to the other end of the first toothed frame (203). A crank rod (205) is movably installed between the four elastic shaft frames (207). Two positioning rings (204) are symmetrically and evenly distributed on the outer wall of the crank (205), and a lever (206) is fixedly connected to the outer wall of the positioning ring (204). The mounting assembly (3) includes a second gear frame (301) meshing with the toothed plate (202) above it. A side shaft (302) is movably connected to the side of the second gear frame (301). A torsion spring disc (303) is provided at the other end of the side shaft (302). An arc plate (304) is fixedly connected to the side of the torsion spring disc (303). The surface of the arc plate (304) is provided with an arc groove (306), and the inner wall of the arc groove (306) is movably connected to a limiting shaft (305). The limiting shaft (305) is fixedly installed on the surface of the support rod (1), and the end of the limiting shaft (305) away from the support rod (1) is fixedly connected to a limiting plate (307).

2. The duct installation device for irregularly shaped walls according to claim 1, characterized in that, 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).

3. The duct installation device for irregularly shaped walls according to claim 1, characterized in that, The frame assembly (7) includes a third gear frame (701) meshing with the toothed plate (202) below. The third gear frame (701) has an auxiliary shaft (702) on its side. 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). A plurality of rubber plates (708) are evenly distributed on the inner frame wall of the half-frame plate (705).

4. The duct installation device for irregularly shaped walls according to claim 3, characterized in that, The upper and lower surfaces of the semi-frame plate (705) are both fixedly connected to mounting plates (707), and through holes are opened on the surface of the mounting plates (707).

5. The duct installation device for irregularly shaped walls according to claim 3, characterized in that, The side of the semi-frame plate (705) is movably mounted with a positioning shaft (706), and the other end of the positioning shaft (706) is movably mounted on the side of the support rod (1).

6. The duct installation device for irregularly shaped walls according to claim 1, characterized in that, The alarm component (8) includes several cylinders (801) that are uniformly distributed and fixedly installed on the outer surface of the half-frame plate (705). The cylinders (801) are provided with oblique holes (804) on the outside. The inner frame wall of the half-frame plate (705) is provided with several semi-circular holes (802) that are uniformly distributed and are on the same horizontal line as the axis of the cylinders (801). A conical cover (803) is fixedly connected to the end of the cylinder (801) away from the half-frame plate (705).

7. The duct installation device for irregular wall surfaces according to claim 6, characterized in that, The inner wall of the cylinder (801) is provided with a baffle (805) in the middle, and the baffle (805) is located directly below the oblique hole (804).

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