A duct air leakage testing device

Abstract

This utility model discloses a pipeline leakage testing device, belonging to the field of testing devices. The device includes a frame with a base plate fixedly connected to its bottom. A leakage testing machine and a fan are mounted on the top of the base plate. An inlet pipe is fixedly connected to the inlet end of the fan, and an outlet pipe is fixedly connected to the outlet end. A temperature sensor is fixedly installed on the surface of the outlet pipe, and a testing mechanism is provided at the end of the outlet pipe. This mechanism can monitor the temperature of the extracted gas. By setting a first test tube, a first test component, a first pagoda connector, and a second pagoda connector, the gas pressure can be obtained based on the gas temperature, flow rate, and the distance between the first and second pagoda connectors, and then analyzed by the leakage testing machine. This facilitates the determination of the gas pressure value inside the pipeline, thereby judging the leakage situation and improving testing accuracy.

Description

Technical Field

[0001] This utility model relates to the field of testing devices, and more specifically, to a pipe leakage testing device. Background Technology

[0002] Pipeline leakage testing is an important means of assessing pipeline sealing performance and is widely used in fields such as HVAC and gas transmission. Existing pipeline leakage testing devices typically determine leakage by detecting changes in air pressure inside a closed pipeline.

[0003] However, in actual testing, different test pieces (such as pipes with different materials, wall thicknesses, and pipe diameters) will experience internal temperature fluctuations due to changes in ambient temperature or differences in their own thermal conductivity. Temperature changes directly affect gas pressure, thus interfering with the accuracy of leakage tests. For example, metal pipes and plastic pipes have different thermal conductivity, resulting in different rates of internal temperature change under the same environment. If the influence of temperature on air pressure is ignored, it will lead to deviations in the calculation of leakage rate. At the same time, for test pieces with smaller pipe diameters, there is less air inside, resulting in lower extracted air pressure, which can easily lead to errors in the test results. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a pipeline leakage testing device that can improve the accuracy of test results.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A pipe leakage testing device includes a frame, a base plate fixedly connected to the bottom of the frame, a leakage testing machine and a fan mounted on the top of the base plate, an air inlet pipe fixedly connected to the air inlet end of the fan, an air outlet pipe fixedly connected to the air outlet end of the fan, a temperature sensor fixedly mounted on the surface of the air outlet pipe, a testing mechanism provided at the end of the air outlet pipe, a first measuring connecting pipe and a second measuring connecting pipe fixedly connected to the leakage testing machine, an auxiliary fixing pipe detachably connected to the end of the air inlet pipe, a third measuring connecting pipe fixedly connected to the leakage testing machine, a flange welded to the end of the auxiliary fixing pipe, the third measuring connecting pipe fixedly mounted on the flange, and a connecting mechanism provided at the connection between the air inlet pipe and the auxiliary fixing pipe.

[0009] Furthermore, the testing mechanism includes a first test tube detachably connected to the end of the air outlet pipe, a first test component disposed on the inner wall of the first test tube, and a first pagoda connector and a second pagoda connector mounted on the surface of the testing mechanism.

[0010] Furthermore, the first test component includes a mounting plate, and two transverse cavity tubes and a longitudinal cavity tube that are installed through the surface of the mounting plate. The surfaces of the transverse cavity tubes and the longitudinal cavity tubes are provided with air inlet grooves. The two ends of the two air inlet grooves are fixedly connected to mounting members. The mounting members are fixedly installed on the inner wall of the first test tube. The top ends of the two longitudinal cavity tubes are fixedly connected to the first pagoda connector and the second pagoda connector, respectively. The air inlet grooves, the transverse cavity tubes, and the longitudinal cavity tubes are interconnected.

[0011] Furthermore, the testing mechanism includes a second test tube detachably connected to the end of the air outlet pipe, a third pagoda connector and a fourth pagoda connector mounted on the surface of the second test tube, and a second test component disposed on the inner wall of the second test tube, wherein the third pagoda connector and the fourth pagoda connector are respectively located on both sides of the second test component.

[0012] Furthermore, the second test component includes a positioning circular plate installed on the inner wall of the second test tube, and a connecting disc that cooperates with the positioning circular plate. A ventilation groove is provided on one side of the connecting disc, and a connecting groove that is adapted to the ventilation groove is provided on one side of the positioning circular plate.

[0013] Furthermore, the side of the positioning disc is provided with a snap-fit ​​groove that matches the connecting disc, and the connecting disc is detachably connected to the positioning disc by fixing bolts.

[0014] Furthermore, the connecting mechanism includes a first clamp and a second clamp that work together. The connecting ends of the first clamp and the second clamp are rotatably connected by a rotating pin, and the openings of the first clamp and the second clamp are threaded with locking bolts.

[0015] Furthermore, handrails are rotatably connected to both sides of the front surface of the frame, and wheels are fixedly connected to the rear surface of the frame.

[0016] 3. Beneficial Effects

[0017] Compared with existing technologies, the advantages of this utility model are:

[0018] (1) This scheme is equipped with a temperature sensor to monitor the temperature of the extracted gas. By setting the first test tube, the first test component, the first pagoda connector and the second pagoda connector, the gas pressure can be obtained based on the gas temperature, flow rate and the distance between the first pagoda connector and the second pagoda connector, and then through the analysis and processing of the air leakage tester. This makes it easier to obtain the air pressure value in the pipeline, thereby judging the air leakage situation and improving the test accuracy.

[0019] (2) When testing the test piece with low gas pressure in the cavity, this scheme can reduce the orifice of the second test tube and limit the flow rate by setting the second test component. Then, based on the gas temperature, flow rate and the distance between the third and fourth pagoda connectors, the gas pressure can be obtained through the analysis and processing of the air leakage tester. This makes it easier to obtain the gas pressure value in the pipeline, thereby judging the air leakage in the low-pressure test piece and improving the test accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a side view of the structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the first measuring connecting tube structure in this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the first test component in this utility model;

[0024] Figure 5 This is a schematic diagram of the second measuring connecting tube structure in this utility model;

[0025] Figure 6 This is a schematic diagram showing the disassembled structure of the second test component in this utility model;

[0026] Figure 7 In this utility model Figure 2 Schematic diagram of the structure at point A in the middle.

[0027] Explanation of the labels in the diagram:

[0028] 1. Frame; 2. Base plate; 3. Air leakage tester; 4. Fan; 5. Inlet duct; 6. Outlet duct; 7. Temperature sensor; 8. Testing mechanism; 9. First measuring connection pipe; 10. Second measuring connection pipe; 11. Auxiliary fixing pipe; 12. Third measuring connection pipe; 13. Flange; 14. Connecting mechanism; 15. Handrail; 16. Wheels;

[0029] 81. First test tube; 82. First test component; 83. First pagoda connector; 84. Second pagoda connector;

[0030] 821. Mounting plate; 822. Transverse cavity tube; 823. Air inlet slot; 824. Longitudinal cavity tube; 825. Mounting component;

[0031] 85. Second test tube; 86. Third pagoda connector; 87. Fourth pagoda connector; 88. Second test component;

[0032] 881. Positioning disc; 882. Connecting disc; 883. Ventilation groove; 884. Connecting groove; 885. Snap-fit ​​groove; 886. Fixing bolt;

[0033] 141. First clamp; 142. Second clamp; 143. Rotating pin; 144. Locking bolt. Detailed Implementation

[0034] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0035] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Example 1:

[0038] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 A pipe leakage testing device includes a frame 1, a base plate 2 fixedly connected to the bottom of the frame 1, a leakage testing machine 3 and a fan 4 installed on the top of the base plate 2, an air inlet pipe 5 fixedly connected to the air inlet end of the fan 4, an air outlet pipe 6 fixedly connected to the air outlet end of the fan 4, a temperature sensor 7 fixedly installed on the surface of the air outlet pipe 6, a testing mechanism 8 provided at the end of the air outlet pipe 6, a first measuring connecting pipe 9 and a second measuring connecting pipe 10 fixedly connected to the leakage testing machine 3, an auxiliary fixing pipe 11 detachably connected to the end of the air inlet pipe 5, a third measuring connecting pipe 12 fixedly connected to the leakage testing machine 3, a flange 13 welded to the end of the auxiliary fixing pipe 11, the third measuring connecting pipe 12 fixedly installed on the flange 13, and a connecting mechanism 14 provided at the connection between the air inlet pipe 5 and the auxiliary fixing pipe 11.

[0039] It should also be noted that the temperature sensor 7 is installed on the frame 1 via a connecting wire. Before measurement, the corresponding auxiliary fixing pipe 11 is installed through the connecting section of the part to be measured. The air inlet pipe 5 and the auxiliary fixing pipe 11 are quickly connected through the connecting mechanism 14. Then, one end of the test piece to be measured is sealed, and the other end is installed on the flange 13 with bolts. At this time, the third measuring connecting pipe 12 is connected to the part to be measured through the gap between the flanges 13. Finally, the first measuring connecting pipe 9 and the second measuring connecting pipe 10 are installed at the corresponding positions on the test mechanism 8.

[0040] During testing, the fan 4 is turned on, and the gas inside the test piece is extracted through the auxiliary fixed pipe 11 and the air inlet pipe 5, and then through the air outlet pipe 6 and the testing mechanism 8. During the extraction process, the air pressure inside the test piece can be monitored by setting the third measuring connection pipe 12, thereby determining the air leakage of the test piece.

[0041] Without considering temperature, if there is no air leakage, the air pressure inside the test piece will drop rapidly, and vice versa.

[0042] When the airflow is discharged through the air outlet duct 6 and the testing mechanism 8, the temperature can be detected by the temperature sensor 7. By setting the testing mechanism 8, the air pressure value of the airflow can be calculated by temperature, positive and negative pressure values, airflow velocity and distance, so as to obtain a more accurate air leakage rate and improve the detection accuracy.

[0043] The testing mechanism 8 includes a first test tube 81 detachably connected to the end of the air outlet duct 6, a first test component 82 disposed on the inner wall of the first test tube 81, and a first pagoda connector 83 and a second pagoda connector 84 installed on the surface of the testing mechanism 8. By setting the first test component 82, the air pressure at the first pagoda connector 83 and the second pagoda connector 84 can be determined. The distance between the first pagoda connector 83 and the second pagoda connector 84 can be determined by the first pagoda connector 83 and the second pagoda connector 84. Then, the air leakage rate can be calculated by combining the formula. Since this calculation process can be obtained by the air leakage tester 3, it will not be described in detail here.

[0044] Furthermore, the first test component 82 includes a mounting plate 821, and two transverse cavity tubes 822 and a longitudinal cavity tube 824 that penetrate and are mounted on the surface of the mounting plate 821. Air inlet grooves 823 are formed on the surfaces of both the transverse cavity tubes 822 and the longitudinal cavity tubes 824. Mounting members 825 are fixedly connected to both ends of the two air inlet grooves 823. The mounting members 825 are fixedly mounted on the inner wall of the first test tube 81. The top ends of the two longitudinal cavity tubes 824 are fixedly connected to a first pagoda connector 83 and a second pagoda connector 84, respectively. The air inlet grooves 823, the transverse cavity tubes 822, and the longitudinal cavity tubes 824 are all part of the first test component 821. The longitudinal cavity tubes 824 are interconnected; the airflow enters the interior of the transverse cavity tubes 822 through the air inlet grooves 823 on the surface of the first pagoda connector 83 and the second pagoda connector 84, and then enters the first pagoda connector 83 and the second pagoda connector 84 respectively through the two longitudinal cavity tubes 824. The first measuring connecting pipe 9 and the second measuring connecting pipe 10 are connected to the first pagoda connector 83 and the second pagoda connector 84 respectively, so that the corresponding information can be input into the connecting PCB board in the air leakage tester 3 for program analysis.

[0045] Preferably, the connecting mechanism 14 includes a first clamp 141 and a second clamp 142 that work together. The connecting ends of the first clamp 141 and the second clamp 142 are rotatably connected by a rotating pin 143. The openings of the first clamp 141 and the second clamp 142 are threaded with locking bolts 144. By clamping the first clamp 141 and the second clamp 142 at the connection between the air inlet pipe 5 and the auxiliary fixing pipe 11 by the rotating pin 143, and then by inserting the locking bolts 144 into the openings of the first clamp 141 and the second clamp 142, the air inlet pipe 5 and the auxiliary fixing pipe 11 can be fixed.

[0046] Furthermore, handrails 15 are rotatably connected to both sides of the front surface of the frame 1, and wheels 16 are fixedly connected to the rear surface of the frame 1. By setting the handrails 15 and wheels 16, the frame 1 can be moved.

[0047] Example 2:

[0048] This embodiment 2 is an improvement based on embodiment 1. The difference between it and embodiment 1 is as follows: Please refer to... Figure 5 and Figure 6 The testing mechanism 8 includes a second test tube 85 detachably connected to the end of the air outlet duct 6, a third pagoda connector 86 and a fourth pagoda connector 87 mounted on the surface of the second test tube 85, and a second test component 88 disposed on the inner wall of the second test tube 85. The third pagoda connector 86 and the fourth pagoda connector 87 are located on both sides of the second test component 88. Before testing the low pressure, the second test tube 85 is installed on the air outlet duct 6, and the first measuring connecting tube 9 and the second measuring connecting tube 10 are inserted into the third pagoda connector 86 and the fourth pagoda connector 87. During the test, by setting the second test component 88, the air pressure at the third pagoda connector 86 and the fourth pagoda connector 87 can be determined. The distance can be determined by the third pagoda connector 86 and the fourth pagoda connector 87, and then the leakage rate can be calculated by combining the formula.

[0049] The second test component 88 includes a positioning circular plate 881 installed on the inner wall of the second test tube 85, and a connecting disc 882 that cooperates with the positioning circular plate 881. A ventilation groove 883 is provided on one side of the connecting disc 882, and a connecting groove 884 that matches the ventilation groove 883 is provided on one side of the positioning circular plate 881. The positioning circular plate 881 facilitates the installation of the connecting disc 882. The ventilation groove 883 and the connecting groove 884 can reduce the diameter of the second test tube 85 to limit its flow rate, thereby avoiding the problem of low air pressure affecting the test accuracy.

[0050] It should also be noted that the side of the positioning plate 881 is provided with a snap-fit ​​groove 885 that is adapted to the connecting disc 882. The connecting disc 882 is detachably connected to the positioning plate 881 by fixing bolts 886. By setting the snap-fit ​​groove 885 and fixing bolts 886, the connecting disc 882 can be installed, and the stability of the connection between the positioning plate 881 and the connecting disc 882 can be increased.

[0051] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A pipe leakage testing device, comprising a frame (1), a base plate (2) fixedly connected to the bottom of the frame (1), a leakage testing machine (3) and a fan (4) mounted on the top of the base plate (2), an air inlet pipe (5) fixedly connected to the air inlet end of the fan (4), and an air outlet pipe (6) fixedly connected to the air outlet end of the fan (4), characterized in that: A temperature sensor (7) is fixedly installed on the surface of the air outlet pipe (6). A test mechanism (8) is provided at the end of the air outlet pipe (6). A first measuring connecting pipe (9) and a second measuring connecting pipe (10) are fixedly connected to the air leakage tester (3). An auxiliary fixing pipe (11) is detachably connected to the end of the air inlet pipe (5). A third measuring connecting pipe (12) is fixedly connected to the air leakage tester (3). A flange (13) is welded to the end of the auxiliary fixing pipe (11). The third measuring connecting pipe (12) is fixedly installed on the flange (13). A connecting mechanism (14) is provided at the connection between the air inlet pipe (5) and the auxiliary fixing pipe (11).

2. The pipe leakage testing device according to claim 1, characterized in that: The testing mechanism (8) includes a first test tube (81) detachably connected to the end of the air outlet pipe (6), a first test component (82) disposed on the inner wall of the first test tube (81), and a first pagoda connector (83) and a second pagoda connector (84) installed on the surface of the testing mechanism (8).

3. The pipe leakage testing device according to claim 2, characterized in that: The first test component (82) includes a mounting plate (821), and two transverse cavity tubes (822) and a longitudinal cavity tube (824) that are installed through the surface of the mounting plate (821). The surfaces of the transverse cavity tubes (822) and the longitudinal cavity tubes (824) are provided with air inlet grooves (823). The two ends of the two air inlet grooves (823) are fixedly connected to the mounting parts (825). The mounting parts (825) are fixedly installed on the inner wall of the first test tube (81). The top ends of the two longitudinal cavity tubes (824) are fixedly connected to the first pagoda connector (83) and the second pagoda connector (84) respectively. The air inlet grooves (823), the transverse cavity tubes (822), and the longitudinal cavity tubes (824) are interconnected.

4. The pipe leakage testing device according to claim 1, characterized in that: The testing mechanism (8) includes a second test tube (85) detachably connected to the end of the air outlet pipe (6), a third pagoda connector (86) and a fourth pagoda connector (87) installed on the surface of the second test tube (85), and a second test component (88) disposed on the inner wall of the second test tube (85). The third pagoda connector (86) and the fourth pagoda connector (87) are respectively located on both sides of the second test component (88).

5. A pipe leakage testing device according to claim 4, characterized in that: The second test component (88) includes a positioning circular plate (881) installed on the inner wall of the second test tube (85) and a connecting disc (882) used in conjunction with the positioning circular plate (881). A ventilation groove (883) is provided on one side of the connecting disc (882), and a connecting groove (884) adapted to the ventilation groove (883) is provided on one side of the positioning circular plate (881).

6. A pipe leakage testing device according to claim 5, characterized in that: The side of the positioning disc (881) is provided with a snap-fit ​​groove (885) that is compatible with the connecting disc (882). The connecting disc (882) is detachably connected to the positioning disc (881) by fixing bolts (886).

7. The pipe leakage testing device according to claim 1, characterized in that: The connecting mechanism (14) includes a first clamp (141) and a second clamp (142) used in conjunction. The connecting ends of the first clamp (141) and the second clamp (142) are rotatably connected by a rotating pin (143). The openings of the first clamp (141) and the second clamp (142) are threaded with locking bolts (144).

8. A pipe leakage testing device according to claim 1, characterized in that: Handrails (15) are rotatably connected to both sides of the front surface of the frame (1), and a walking wheel (16) is fixedly connected to the rear surface of the frame (1).

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