Air pipeline leak detection device

Abstract

The utility model discloses an air duct leak detection device, which comprises an electric remote control dolly placed on the inner wall of one end of an air duct, one end of the electric remote control dolly is provided with a detection assembly, the detection assembly comprises a cylinder and a hollow cylinder, the cylinder is fixed on one end of an auxiliary frame, the hollow cylinder is fixedly connected with one end of the cylinder, and the hollow cylinder is fixed on the auxiliary frame. The other end of the hollow cylinder is fixedly connected with the air pipe, a plurality of smoke outlets arranged in the circumferential direction are formed in the outer wall of one end of the hollow cylinder, and an electric heating plate is installed on the inner wall of the end, away from the smoke outlets, of the hollow cylinder; through the arrangement of the hollow cylinder, the limiting net, the smoke outlet and the electric heating plate, smoke is released into the air pipe during detection, when leakage points exist, smoke and lamplight leak from the leakage points, smoke particles scatter light rays, obvious light fog or light columns are formed at the leakage points, the smoke particles can be perceived by naked eyes more easily, the smoke can flow, and the smoke leakage is avoided. The dynamic smoke track is easier to identify than static light.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, and in particular to a leak detection device for air ducts. Background Technology

[0002] Ventilation ducts are used to transport air for indoor ventilation. After construction, leak detection is necessary to identify and address any leaks. Duct light leakage testing is a commonly used and indispensable non-contact testing technique in duct installation projects, widely applied in various ductwork projects, air conditioning system condition monitoring, and fault detection. In HVAC systems, the sealing performance of ducts significantly impacts energy consumption. By observing light leakage at duct joints through light leakage testing, the air leakage status of the ductwork can be understood.

[0003] A search revealed a Chinese patent publication number CN209484290U, which discloses a duct leak detection device, including a remote-controlled vehicle. The remote-controlled vehicle has a shell, and several light-emitting elements are arranged on the surface of the shell and the bottom of the remote-controlled vehicle. A camera is arranged in the shell, and a central processing unit is arranged inside the remote-controlled vehicle. The central processing unit is connected to a transmission line, one end of which is connected to the central processing unit, and the other end is connected to a remote control handle. The camera and the light-emitting elements are electrically connected to the central processing unit.

[0004] This patent uses a camera to capture images and communicates them to a display screen via a network cable. It controls a small car to move to the duct interface and observes whether there is a light source shining out in the dark to determine whether there is a leak. However, the detection principle of this patent is to observe whether there is light leakage outside. When the duct material is thick or the external ambient light is strong, the light leakage is not obvious enough and difficult to detect, which affects the detection results. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a leak detection device for air ducts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A duct leak detection device includes an electric remote-controlled trolley placed on the inner wall of one end of the duct. A detection component is provided at one end of the electric remote-controlled trolley. The detection component includes a cylindrical cylinder and a hollow cylinder. The cylindrical cylinder is fixed to one end of an auxiliary frame, and the hollow cylinder is fixedly connected to one end of the cylindrical cylinder. The other end of the hollow cylinder is fixedly connected to the duct. Multiple circumferentially arranged smoke outlets are opened on the outer wall of one end of the hollow cylinder. An electric heating plate is installed on the inner wall of the hollow cylinder at the end away from the smoke outlets. A limiting net is fixed to the inner wall of the hollow cylinder between the electric heating plate and the smoke outlets. The space between the limiting net and the electric heating plate is a placement cavity. A side-opening door is provided on one side of the placement cavity on the outer wall of the hollow cylinder.

[0008] As a further improvement of this utility model: the outer wall of the cylinder is provided with multiple LED light strips arranged circumferentially, and the end of the detection component away from the electric remote control car is connected to an auxiliary frame.

[0009] As a further improvement of this utility model: a camera is fixed to the top outer wall of one end of the electric remote control car via a support frame, and a winding assembly is connected to one end of the auxiliary frame.

[0010] As a further embodiment of this utility model: the winding assembly includes a fixing frame and a threaded rod, the fixing frame is placed on the inner wall of the bottom of one end of the air duct, and the threaded rod is threadedly connected to the bottom end of the fixing frame.

[0011] As a further improvement of this utility model: the bottom end of the threaded rod is rotatably connected to a clamping plate, and the top end of the clamping plate is fixed with a guide rod that slides with the fixing frame.

[0012] As a further improvement of this utility model: a take-up roller is rotatably connected to the inner wall of the fixed frame, and a data cable is wound around the outer wall of the take-up roller, with one end of the data cable connected to the auxiliary frame.

[0013] As a further improvement of this utility model: a crank handle is rotatably connected to the outer wall of the fixed frame, and the crank handle's shaft is connected to the winding roller's shaft.

[0014] Compared with the prior art, the present invention provides a duct leak detection device, which has the following advantages:

[0015] 1. This utility model, by setting a hollow cylinder, a limiting net, a smoke outlet and an electric heating plate, releases smoke into the air duct during detection. When a leak point exists, smoke and light will leak out from the leak point. The smoke particles will scatter light and form obvious "light fog" or "light pillar" at the leak point, which is easier to be detected by the naked eye. Moreover, the smoke will flow, and the dynamic smoke trajectory is easier to identify than static light.

[0016] 2. This utility model, by setting an auxiliary frame, a cylinder and LED light strips, ensures that when illuminating the air duct, the light emitted by the LED light strips is not obstructed, and can completely illuminate the inner wall of the air duct around the cylinder, eliminating any blind spots in the lighting.

[0017] 3. This utility model, by providing a fixing frame, clamping plate and threaded rod, can clamp and fix the fixing frame and clamping plate together to one end of the air duct. This avoids the situation where the air duct is usually located in the ceiling and wall, and there is no platform around the end of the air duct to place the fixing frame. If the fixing frame is placed on the ground, when winding up the data cable, if the remaining length of the data cable is not paid attention, the electric remote control car and auxiliary frame may be pulled out of the air duct and fall and be damaged. If the fixing frame is placed inside the air duct, it is inconvenient to operate due to the space limitation of the air duct.

[0018] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a duct leak detection device proposed in this utility model.

[0020] Figure 2 This is a partial structural schematic diagram of a duct leak detection device proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the hollow cylinder of a duct leak detection device proposed in this utility model;

[0022] Figure 4 This is a schematic diagram of the winding assembly of a duct leak detection device proposed in this utility model.

[0023] In the diagram: 1. Air duct; 2. Electric remote control car; 3. Auxiliary frame; 4. Detection component; 5. Rewinding component; 6. Cylinder; 7. LED light strip; 8. Hollow cylinder; 9. Limiting net; 10. Smoke outlet; 11. Electric heating plate; 12. Camera; 13. Fixing bracket; 14. Rewinding roller; 15. Data cable; 16. Clamping plate; 17. Threaded rod; 18. Crank handle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Example 1

[0027] A duct leak detection device, such as Figures 1 to 3As shown, the device includes an electric remote-controlled vehicle 2 placed on the inner wall of one end of the duct 1. A camera 12 is fixed to the top outer wall of one end of the electric remote-controlled vehicle 2 via a support frame. A detection component 4 is provided at one end of the electric remote-controlled vehicle 2. An auxiliary frame 3 is connected to the end of the detection component 4 away from the electric remote-controlled vehicle 2. Both the electric remote-controlled vehicle 2 and the auxiliary frame 3 are existing mature technologies, and their technical principles and basic structures are well known to those skilled in the art, so they will not be described in detail here. A winding component 5 is connected to one end of the auxiliary frame 3.

[0028] The detection component 4 includes a cylinder 6 and a hollow cylinder 8. The cylinder 6 is fixed to one end of the auxiliary frame 3, and the hollow cylinder 8 is fixedly connected to one end of the cylinder 6. The other end of the hollow cylinder 8 is fixedly connected to the air duct 1. The outer wall of the cylinder 6 is provided with multiple LED light strips 7 arranged in a circumferential direction. The outer wall of one end of the hollow cylinder 8 is provided with multiple smoke outlets 10 arranged in a circumferential direction. An electric heating plate 11 is installed on the inner wall of the end of the hollow cylinder 8 away from the smoke outlets 10. A limiting net 9 is fixed on the inner wall of the hollow cylinder 8 between the electric heating plate 11 and the smoke outlets 10. The space between the limiting net 9 and the electric heating plate 11 is a placement cavity. The outer wall of the hollow cylinder 8 is provided with a side door located on one side of the placement cavity.

[0029] During testing, the winding assembly 5 is fixed to one end of the duct 1. The side door is opened and the smoke-generating material is placed into the placement cavity. The electric remote-controlled trolley 2 drives the testing assembly 4 and the auxiliary frame 3 to move along the duct 1. The LED light strip 7 illuminates the inside of the duct 1. At the same time, the electric heating plate 11 heats the smoke-generating material to produce smoke. The smoke diffuses from the smoke outlet 10 to the hollow cylinder 8 and fills the inside of the duct 1. When there is a leak, the smoke and light will leak out from the leak. The smoke particles will scatter the light and form obvious "light fog" or "light pillar" at the leak point, which is easier to be detected by the naked eye. Moreover, the smoke will flow, and the dynamic smoke trajectory is easier to identify than static light.

[0030] By setting up a hollow cylinder 8, a limiting net 9, a smoke outlet 10, and an electric heating plate 11, smoke is released into the air duct 1 during detection. When a leak is found, smoke and light will leak out from the leak. The smoke particles will scatter the light, forming an obvious "light fog" or "light column" at the leak, which is easier to detect with the naked eye. Moreover, the smoke will flow, and the dynamic smoke trajectory is easier to identify than static light.

[0031] By setting up an auxiliary frame 3, a cylinder 6 and an LED light strip 7, when illuminating the air duct 1, the light emitted by the LED light strip 7 is not obstructed, and the inner wall of the air duct 1 around the cylinder 6 can be completely illuminated, with no blind spots in the lighting.

[0032] Example 2

[0033] A duct leak detection device, this embodiment is based on embodiment 1, with the following improvements, such as... Figure 4As shown, the winding assembly 5 includes a fixed frame 13 and a threaded rod 17. The fixed frame 13 is placed on the inner wall of the bottom of one end of the air duct 1. The threaded rod 17 is threaded to the bottom end of the fixed frame 13. A clamping plate 16 is rotatably connected to the bottom end of the threaded rod 17. A guide rod that slides with the fixed frame 13 is fixed to the top end of the clamping plate 16. A winding roller 14 is rotatably connected to the inner wall of the fixed frame 13. A data cable 15 is wound around the outer wall of the winding roller 14. One end of the data cable 15 is connected to the auxiliary frame 3. A crank handle 18 is rotatably connected to the outer wall of the fixed frame 13. The rotating shaft of the crank handle 18 is connected to the rotating shaft of the winding roller 14.

[0034] Before testing, place the fixing frame 13 on the inner wall of the bottom end of the air duct 1, and rotate the threaded rod 17 to move the clamping plate 16 toward the fixing frame 13. The fixing frame 13 and the clamping plate 16 cooperate to clamp and fix one end of the air duct 1. This avoids the situation where the air duct 1 is usually located inside the ceiling and walls, and there is no platform around the end of the air duct 1 to place the fixing frame 13. If the fixing frame 13 is placed on the ground, when winding up the data cable 15, if the remaining length of the data cable 15 is not paid attention, the electric remote control car 2 and the auxiliary frame 3 may be pulled out of the air duct 1 and fall and be damaged. If the fixing frame 13 is placed inside the air duct 1, it is inconvenient to operate due to the space limitation of the air duct 1. When the electric remote control car 2 and the auxiliary frame 3 move, they will pull the data cable 15, which will drive the winding roller 14 to rotate and unwind. After the test is completed, turn the crank handle 18 to rotate the winding roller 14 to wind up the data cable 15. The data cable 15 can supply power to the electric remote control car 2, the test component 4, and the camera 12 and other electrical structures.

[0035] By providing a fixing bracket 13, a clamping plate 16, and a threaded rod 17, the fixing bracket 13 and the clamping plate 16 can be clamped and fixed to one end of the air duct 1. This avoids the situation where, since the air duct 1 is usually located inside the ceiling and walls, there is no platform around the end of the air duct 1 to place the fixing bracket 13. If the fixing bracket 13 is placed on the ground, when winding up the data cable 15, carelessness may cause the electric remote control car 2 and the auxiliary frame 3 to be pulled out of the air duct 1 and fall and be damaged. If the fixing bracket 13 is placed inside the air duct 1, it is inconvenient to operate due to the space limitation of the air duct 1.

[0036] Working principle: During testing, the fixing frame 13 is placed on the inner wall of the bottom end of the air duct 1. The threaded rod 17 is rotated to move the clamping plate 16 toward the fixing frame 13. The fixing frame 13 and the clamping plate 16 cooperate to clamp and fix it to one end of the air duct 1. The side door is opened and the smoke-generating material is placed into the placement cavity. The electric remote control trolley 2 drives the detection component 4 and the auxiliary frame 3 to move along the air duct 1. The LED light strip 7 illuminates the inside of the air duct 1. At the same time, the electric heating plate 11 heats the smoke-generating material to generate smoke. The smoke diffuses from the smoke outlet 10 to the hollow cylinder 8 and fills the inside of the air duct 1. When there is a leak, the smoke and light will leak out from the leak. The smoke particles will scatter the light and form obvious "light fog" or "light pillar" at the leak point, which is easier to be detected by the naked eye. Moreover, the smoke will flow, and the dynamic smoke trajectory is easier to identify than static light.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A duct leak detection device, comprising an electric remote-controlled trolley (2) placed on the inner wall of one end of a duct (1), characterized in that, The electric remote control car (2) is equipped with a detection component (4) at one end. The detection component (4) includes a cylinder (6) and a hollow cylinder (8). The cylinder (6) is fixed to one end of the auxiliary frame (3). The hollow cylinder (8) is fixedly connected to one end of the cylinder (6). The other end of the hollow cylinder (8) is fixedly connected to the air duct (1). The outer wall of one end of the hollow cylinder (8) is provided with multiple circumferentially arranged smoke outlets (10). An electric heating plate (11) is installed on the inner wall of the end of the hollow cylinder (8) away from the smoke outlets (10). A limiting net (9) is fixed on the inner wall of the hollow cylinder (8) between the electric heating plate (11) and the smoke outlets (10). The space between the limiting net (9) and the electric heating plate (11) is a placement cavity. A side door is provided on one side of the placement cavity on the outer wall of the hollow cylinder (8).

2. The duct leak detection device according to claim 1, characterized in that, The outer wall of the cylinder (6) is provided with multiple LED light strips (7) arranged in a circumferential direction, and the detection component (4) is connected to an auxiliary frame (3) at the end away from the electric remote control car (2).

3. A duct leak detection device according to claim 2, characterized in that, The electric remote control vehicle (2) has a camera (12) fixed to the top outer wall of one end by a support frame, and a winding assembly (5) is connected to one end of the auxiliary frame (3).

4. A duct leak detection device according to claim 3, characterized in that, The winding assembly (5) includes a fixed frame (13) and a threaded rod (17). The fixed frame (13) is placed on the inner wall of the bottom of one end of the air duct (1), and the threaded rod (17) is threaded to the bottom end of the fixed frame (13).

5. A duct leak detection device according to claim 4, characterized in that, The bottom end of the threaded rod (17) is rotatably connected to a clamping plate (16), and the top end of the clamping plate (16) is fixed with a guide rod that slides with the fixing frame (13).

6. A duct leak detection device according to claim 4, characterized in that, The inner wall of the fixed frame (13) is rotatably connected to a take-up roller (14), and the outer wall of the take-up roller (14) is wound with a data cable (15). One end of the data cable (15) is connected to the auxiliary frame (3).

7. A duct leak detection device according to claim 6, characterized in that, The outer wall of the fixed frame (13) is rotatably connected to a crank handle (18), and the shaft of the crank handle (18) is connected to the shaft of the take-up roller (14).

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