Heating and ventilation pipeline air tightness detection device

Abstract

The utility model discloses a heating and ventilation pipeline air tightness detection device, which relates to the technical field of pipeline detection and comprises a water storage tank, a supporting plate is fixed on the back of the water storage tank, two first electric push rods are mounted at the top of the supporting plate, a U-shaped plate is fixedly mounted at the output ends of the two first electric push rods, and a carrying pipe is inserted into the right side of the U-shaped plate. The U-shaped plate is rotationally connected with the carrying pipe through a bearing, and a pushing assembly, an air blowing assembly, an air inflation assembly and a driving motor are installed on the U-shaped plate. The driving motor is used for driving the second chain wheel to rotate, so that the second chain wheel drags the first chain wheel to rotate through the transmission chain, the first chain wheel drives the two clamping plates and the hard heating and ventilation pipeline clamped by the two clamping plates to rotate, and the hard heating and ventilation pipeline throws away water drops adhered to the outside of the hard heating and ventilation pipeline through centrifugal force in the rotating process; and the air blowing assembly can perform air drying treatment on the rotating hard heating and ventilation pipeline, so that the drying efficiency of the detected hard heating and ventilation pipeline is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline inspection technology, and in particular to a device for testing the airtightness of HVAC pipelines. Background Technology

[0002] Heating, ventilation, and air conditioning (HVAC) pipes are commonly used as piping in air conditioning equipment rooms, external heating networks, indoor heating pipes, and air conditioning water pipes due to their advantages such as good sealing, strength, and rigidity. HVAC pipes come in both rigid and flexible types. To ensure the safe and stable long-term use of HVAC pipes, an airtightness test is performed before they leave the factory to guarantee that no air or liquid leaks will occur during use.

[0003] Common airtightness testing devices for rigid HVAC ducts typically involve placing the duct in a water tank and pressurizing it with air. The airtightness is determined by observing whether bubbles are continuously generated on the duct surface. This method is simple and effective. However, after the duct is submerged in water, some water droplets remain on its surface. Drying the duct with a blower takes a long time, which significantly affects the overall efficiency of the duct testing and is not conducive to actual production. Utility Model Content

[0004] The purpose of this application is to provide a heating, ventilation, and air conditioning (HVAC) pipe air tightness testing device to solve the problem mentioned in the background art that after the pipe is immersed in water, some water droplets remain on its surface after testing. Relying solely on blower drying requires a long time to dry the outside of the pipe, which seriously affects the overall efficiency of pipe testing and is not conducive to actual pipe production.

[0005] To achieve the above objectives, this application provides the following technical solution: a heating, ventilation, and air conditioning (HVAC) duct air tightness testing device, comprising a water storage tank, a support plate fixed to the back of the water storage tank, two first electric actuators mounted on the top of the support plate, a U-shaped plate fixedly mounted on the output end of the two first electric actuators, a carrier pipe inserted into the right side of the U-shaped plate, and the joint between the U-shaped plate and the carrier pipe being rotatably connected by a bearing, a pushing assembly, a blower assembly, an air inflation assembly, and a drive motor mounted on the U-shaped plate, clamps mounted on both the pushing assembly and the carrier pipe, a piston fixed on the clamps, the clamps and piston on the carrier pipe being fixedly sleeved on the outside of the carrier pipe, the pushing assembly being used to adjust the distance between the two clamps, the blower assembly being used to dry the surface of the HVAC duct, the air inflation assembly being used to inflate the carrier pipe, a first sprocket fixedly sleeved on the outside of the carrier pipe, a second sprocket fixedly mounted on the output shaft end of the drive motor, and a transmission chain mounted on the first sprocket and the second sprocket.

[0006] Furthermore, a guide groove is provided at the end of the piston away from the clamping plate, and two sealing elements are sleeved on the outside of the piston.

[0007] Furthermore, the inflation assembly includes an air pump, which is mounted on a U-shaped plate, and the air outlet end of the air pump is fixedly connected to an air delivery pipe. A rotary joint is installed between the U-shaped plate and the air delivery pipe.

[0008] Furthermore, the jacking assembly includes a fixing plate, which is fixedly mounted on a U-shaped plate, and a second electric push rod is mounted on the fixing plate. A carrier plate is fixedly mounted on the output end of the second electric push rod. A guide rod is fixed on the right side of the carrier plate, and a clamping plate is mounted on the right end of the guide rod on the left side. The clamping plate and the guide rod are rotatably connected by a bearing.

[0009] Furthermore, the guide rod is slidably inserted into the U-shaped plate, and the U-shaped plate has through holes for the guide rod to pass through.

[0010] Furthermore, the blower assembly includes two blowers and a blower box, both of which are mounted on a U-shaped plate, and an air supply pipe is fixedly connected between the air outlet of the blower and the blower box.

[0011] Furthermore, a drain pipe is fixedly connected to the right side of the water storage tank, and a valve is installed on the drain pipe.

[0012] In summary, the technical effects and advantages of this utility model are as follows:

[0013] 1. In this utility model, a drive motor drives the second sprocket to rotate, which in turn pulls the first sprocket to rotate via a transmission chain. The first sprocket drives the two clamping plates and the rigid HVAC pipe held by the two clamping plates to rotate. During the rotation, the rigid HVAC pipe uses centrifugal force to throw off the water droplets adhering to its exterior. The blower assembly can air dry the rotating rigid HVAC pipe, which significantly improves the drying efficiency of the rigid HVAC pipe after testing, and is more conducive to the actual production of rigid HVAC pipe.

[0014] 2. In this utility model, the second electric actuator pulls the carrier plate to move, so that the carrier plate pulls the left clamping plate to move with the help of the guide rod, thereby adjusting the distance between the two clamping plates to clamp both ends of the rigid HVAC pipe. The air pump blows air into the air supply pipe, and the air flows into the clamped rigid HVAC pipe along the air supply pipe, the rotary joint and the carrier pipe. The two first electric actuators push the rigid HVAC pipe into the water, so that it can be observed whether the rigid HVAC pipe leaks air in the water, thus completing the airtightness test of the rigid HVAC pipe. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1This is a three-dimensional structural schematic diagram of a heating, ventilation, and air conditioning (HVAC) duct air tightness testing device according to an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of the installation of HVAC pipes on this device in an embodiment of this application;

[0018] Figure 3 This is a diagram showing the positional relationship between the U-shaped plate, clamping plate, piston, and transmission chain in the embodiments of this application;

[0019] Figure 4 This is a diagram showing the positional relationship of the U-shaped plate, the pushing assembly, the blowing assembly, and the inflation assembly in the embodiments of this application.

[0020] In the diagram: 1. Water storage tank; 2. Support plate; 3. First electric actuator; 4. U-shaped plate; 5. Carrier pipe; 6. Clamping plate; 7. Piston; 8. First sprocket; 9. Drive motor; 10. Second sprocket; 11. Transmission chain; 12. Seal; 13. Air pump; 14. Air supply pipe; 15. Rotary joint; 16. Fixing plate; 17. Second electric actuator; 18. Carrier plate; 19. Guide rod; 20. Blower; 21. Air supply pipe; 22. Air box; 23. Drain pipe. Detailed Implementation

[0021] 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.

[0022] Example: Reference Figure 1-4The HVAC duct airtightness testing device shown includes a water storage tank 1. A drain pipe 23 is fixedly connected to the right side of the water storage tank 1. A valve is installed on the drain pipe 23. Opening the valve on the drain pipe 23 facilitates the drainage of water from the water storage tank 1. A support plate 2 is fixed to the back of the water storage tank 1. Two first electric actuators 3 are installed on the top of the support plate 2. A U-shaped plate 4 is fixedly installed at the output end of the two first electric actuators 3. A carrier pipe 5 is inserted into the right side of the U-shaped plate 4, and the joint between the U-shaped plate 4 and the carrier pipe 5 is rotatably connected by a bearing. A jacking assembly, a blower assembly, an air inflation assembly, and a drive motor 9 are installed on the U-shaped plate 4. Clamping plates 6 are installed on both the jacking assembly and the carrier pipe 5. A piston 7 is fixedly fitted on the outside of the carrier pipe 5, and the clamping plate 6 on the carrier pipe 5 is fixedly fitted on the outside of the carrier pipe 5. A guide groove is opened at the end of the piston 7 away from the clamping plate 6, and two sealing elements 12 are fitted on the outside of the piston 7. The sealing elements 12 can ensure the sealing performance of the piston 7 to the rigid HVAC pipe. The setting of the guide groove facilitates the insertion of the piston 7 into the rigid HVAC pipe. The pushing assembly is used to adjust the distance between the two clamping plates 6. The blowing assembly is used to dry the surface of the HVAC pipe. The air inflation assembly is used to inflate the carrier pipe 5. A first sprocket 8 is fixedly fitted on the outside of the carrier pipe 5. A second sprocket 10 is fixed at the output shaft end of the drive motor 9. A transmission chain 11 is installed on the first sprocket 8 and the second sprocket 10.

[0023] The second sprocket 10 is driven to rotate by the drive motor 9, which in turn pulls the first sprocket 8 to rotate via the transmission chain 11. The first sprocket 8 drives the two clamping plates 6 and the rigid HVAC pipe held by the two clamping plates 6 to rotate. During the rotation, the rigid HVAC pipe uses centrifugal force to throw off the water droplets adhering to its exterior. The blower assembly can dry the rotating rigid HVAC pipe, which significantly improves the drying efficiency of the rigid HVAC pipe after testing.

[0024] The inflation assembly includes an air pump 13, which is mounted on a U-shaped plate 4. The air outlet of the air pump 13 is fixedly connected to an air supply pipe 14, and a rotary joint 15 is installed between the U-shaped plate 4 and the air supply pipe 14.

[0025] The jacking assembly includes a fixed plate 16, which is fixedly mounted on a U-shaped plate 4. A second electric push rod 17 is mounted on the fixed plate 16. A carrier plate 18 is fixedly mounted on the output end of the second electric push rod 17. A guide rod 19 is fixed on the right side of the carrier plate 18. A left clamping plate 6 is mounted on the right end of the guide rod 19. The clamping plate 6 and the guide rod 19 are rotatably connected by a bearing. The guide rod 19 is slidably inserted into the U-shaped plate 4. A through hole is provided on the U-shaped plate 4 for the guide rod 19 to pass through.

[0026] The second electric actuator 17 is used to pull the carrier plate 18 to move, so that the carrier plate 18 pulls the left clamping plate 6 to move with the help of the guide rod 19, thereby adjusting the distance between the two clamping plates 6 to clamp both ends of the rigid HVAC pipe. The air pump 13 blows air into the air supply pipe 14, and the air flows into the clamped rigid HVAC pipe along the air supply pipe 14, the rotary joint 15 and the carrier pipe 5. The two first electric actuators 3 push the rigid HVAC pipe into the water, so that it can be observed whether the rigid HVAC pipe leaks air in the water, thus completing the airtightness test of the rigid HVAC pipe.

[0027] The blower assembly includes two blowers 20 and a wind box 22. Both blowers 20 and the wind box 22 are mounted on the U-shaped plate 4. An air supply pipe 21 is fixedly connected between the air outlet of the blower 20 and the wind box 22.

[0028] Two blowers 20 are used to send air to the air box 22. The air is discharged along the bottom of the air box 22 and acts on the rigid HVAC pipe to dry it.

[0029] Working principle of this utility model:

[0030] Place the right end of the rigid HVAC pipe to be tested onto the piston 7 on the right side, and ensure that the rigid HVAC pipe is tightly fitted with the clamping plate 6 on the right side. Activate the second electric actuator 17 to pull the carrier plate 18 to the right, so that the carrier plate 18 pushes the clamping plate 6 on the left side to the right with the help of the guide rod 19, until the piston 7 on the left side is inserted into the rigid HVAC pipe, and the clamping plate 6 on the left side is also tightly fitted with the rigid HVAC pipe, so that the two clamping plates 6 tightly clamp the rigid HVAC pipe. Activate the two first electric actuators 3 to push the rigid HVAC pipe down, so that the rigid HVAC pipe enters the water storage tank 1 and is completely submerged in water. Activate the air pump 13 to pressurize the rigid HVAC pipe with air, and observe whether air bubbles are continuously generated in the water. If air bubbles are continuously generated on the surface of the rigid HVAC pipe, it indicates that the rigid HVAC pipe is unqualified and has poor air tightness. If no air bubbles are generated, it indicates that the rigid HVAC pipe has qualified air tightness.

[0031] After the rigid HVAC duct is inspected, two first electric actuators 3 are used to pull the rigid HVAC duct upwards, causing it to leave the water surface. The drive motor 9 and two blowers 20 are then activated, causing the drive motor 9 to drive the second sprocket 10 to rotate. The second sprocket 10, through the transmission chain 11, pulls the first sprocket 8 to rotate. The first sprocket 8 drives the two clamping plates 6 and the rigid HVAC duct held between the two clamping plates 6 to rotate. With the help of centrifugal force, the rotating rigid HVAC duct can shake off the water droplets on its surface. The two blowers 20 send air into the air box 22. The air is discharged along the bottom of the air box 22 and acts on the rigid HVAC duct to dry it, so that the rigid HVAC duct can be quickly dried and removed.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for testing the air tightness of HVAC ducts, comprising a water storage tank (1), characterized in that: The back of the water storage tank (1) is fixed with a support plate (2). Two first electric push rods (3) are installed on the top of the support plate (2). A U-shaped plate (4) is fixedly installed at the output end of the two first electric push rods (3). A carrier tube (5) is inserted into the right side of the U-shaped plate (4). The joint between the U-shaped plate (4) and the carrier tube (5) is rotatably connected by a bearing. A jacking assembly, a blower assembly, an air filling assembly, and a drive motor (9) are installed on the U-shaped plate (4). A clamping plate (6) is installed on both the jacking assembly and the carrier tube (5). A piston (7) is fixed on the upper part of the carrier tube (5). The clamps (6) and piston (7) on the carrier tube (5) are fixedly sleeved on the outside of the carrier tube (5). The pushing assembly is used to adjust the distance between the two clamps (6). The blower assembly is used to dry the surface of the HVAC pipe. The air filling assembly is used to fill the carrier tube (5) with air. A first sprocket (8) is fixedly sleeved on the outside of the carrier tube (5). A second sprocket (10) is fixed on the output shaft end of the drive motor (9). A transmission chain (11) is installed on the first sprocket (8) and the second sprocket (10).

2. The airtightness testing device for HVAC ducts according to claim 1, characterized in that: The piston (7) has a guide groove at one end away from the clamping plate (6), and two sealing elements (12) are sleeved on the outside of the piston (7).

3. The airtightness testing device for HVAC ducts according to claim 1, characterized in that: The inflation assembly includes an air pump (13), which is mounted on a U-shaped plate (4) and has an air supply pipe (14) fixedly connected to the air outlet end of the air pump (13). A rotary joint (15) is installed between the U-shaped plate (4) and the air supply pipe (14).

4. The airtightness testing device for HVAC ducts according to claim 1, characterized in that: The jacking assembly includes a fixed plate (16), which is fixedly mounted on a U-shaped plate (4). A second electric push rod (17) is mounted on the fixed plate (16). A carrier plate (18) is fixedly mounted on the output end of the second electric push rod (17). A guide rod (19) is fixed on the right side of the carrier plate (18). A clamping plate (6) is mounted on the right end of the guide rod (19) on the left side. The clamping plate (6) and the guide rod (19) are rotatably connected by a bearing at their joint.

5. The airtightness testing device for HVAC ducts according to claim 4, characterized in that: The guide rod (19) is slidably inserted into the U-shaped plate (4), and the U-shaped plate (4) has a through hole for the guide rod (19) to pass through.

6. The airtightness testing device for HVAC ducts according to claim 1, characterized in that: The blower assembly includes two blowers (20) and a blower box (22). Both blowers (20) and blower box (22) are mounted on a U-shaped plate (4). An air supply pipe (21) is fixedly connected between the air outlet of the blower (20) and the blower box (22).

7. The airtightness testing device for HVAC ducts according to claim 1, characterized in that: A drain pipe (23) is fixedly connected to the right side of the water storage tank (1), and a valve is installed on the drain pipe (23).

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