A device for detecting the airtightness of a product

Abstract

This invention provides a device for testing the airtightness of a product, comprising a support frame with two symmetrically welded support seats on its top, which together support an exhaust pipe. A display screen is mounted on the support frame, connected via wiring to a pressure sensor, which is inserted into the air inlet of the exhaust pipe. An air pump is located inside the support frame, and a control switch is mounted on the support frame, electrically connected to the air pump. The air pump is connected via an air supply pipe to an inflation head, which is inserted into the air outlet of the exhaust pipe. This invention allows users to conveniently and effectively test the airtightness of an exhaust pipe, significantly improving the accuracy of airtightness testing.

Description

Technical Field

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

[0002] All gasoline-powered vehicles are equipped with exhaust pipes, which are mainly used to discharge exhaust gases and reduce noise. Therefore, the exhaust pipe is an essential component of gasoline-powered vehicles. During production, exhaust pipes typically require a specific shape to fit the mounting position on gasoline-powered vehicles. To achieve this shape, exhaust pipes are generally composed of several pipe sections welded together. This results in weld seams on the exhaust pipe. However, these weld seams are prone to leaks and noise due to improper welding by workers. Therefore, exhaust pipes must undergo weld seam inspection before leaving the factory to ensure that their airtightness is up to standard.

[0003] Currently, when inspecting the weld seams of exhaust pipes to ensure their airtightness, workers typically visually inspect the weld seams for pores. However, due to worker fatigue, it is easy to miss pores in the weld seams. Therefore, relying on manual visual inspection of the weld seams cannot accurately determine the airtightness of each exhaust pipe. Thus, the existing airtightness inspection methods for exhaust pipes need improvement. Utility Model Content

[0004] This utility model aims to provide a device for detecting the airtightness of a product, in order to solve the problem mentioned in the background art that when inspecting the weld seams of exhaust pipes to ensure the airtightness of the exhaust pipes, workers usually visually inspect the weld seams for pores. However, due to worker fatigue, it is easy to miss pores in the weld seams. Therefore, it is impossible to accurately detect whether the airtightness of each exhaust pipe is qualified by manually visually inspecting the weld seams. Thus, the existing airtightness detection methods for exhaust pipes need to be improved.

[0005] The technical solution adopted by this utility model to solve the technical problem is as follows: A device for detecting the airtightness of a product includes a support frame, two support seats symmetrically welded to the top of the support frame, the two support seats being used to jointly support an exhaust pipe; a display and control screen is provided on the support frame, the display and control screen is connected to a pressure sensor via a circuit, the pressure sensor being inserted into the air inlet of the exhaust pipe; an air pump is provided on the inner side of the support frame, a control switch is provided on the support frame, the control switch is electrically connected to the air pump, the air pump is connected to an inflation head via an air supply pipe, the inflation head being inserted into the air outlet of the exhaust pipe.

[0006] In some embodiments, the top of each of the two supports is provided with a groove for accommodating a portion of the exhaust pipe.

[0007] In some embodiments, a first silicone layer is fixedly provided on the outer surface of the pressure sensor. When the pressure sensor is inserted into the air inlet of the exhaust pipe, the first silicone layer on the outer surface of the pressure sensor is used to abut against the inner wall of the exhaust pipe.

[0008] In some embodiments, a second silicone layer is fixedly provided on the outer surface of the inflation head, and when the inflation head is inserted into the air outlet of the exhaust pipe, the second silicone layer on the outer surface of the inflation head is used to abut against the inner wall of the exhaust pipe.

[0009] In some embodiments, the support frame is provided with a first winding hook for winding the wire.

[0010] In some embodiments, the support frame is provided with a second winding hook for winding the gas pipeline.

[0011] In some embodiments, the bottom of the support frame is provided with a plurality of lockable casters, and the front side of the support frame is provided with a handle.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] In this invention, when performing an airtightness test on an exhaust pipe, the user places the exhaust pipe on two support bases so that the two bases jointly support the exhaust pipe for the airtightness test. Then, the user inserts a pressure sensor into the air inlet of the exhaust pipe, which seals the inlet. The user also inserts an inflation head into the air outlet of the exhaust pipe, which seals the outlet. Finally, the user operates a control switch to operate the air pump. When the air pump is running, a certain amount of air is injected into the exhaust pipe through the inflation head inserted into the outlet. After the air pump has been properly pressurized, the user operates the control switch to stop injecting air pressure into the exhaust pipe. At this time, a pressure sensor connected to the air inlet of the exhaust pipe monitors the air pressure inside the pipe in real time and transmits this real-time pressure value to the display screen. The user records the air pressure value displayed on the screen when the air pump has properly injected air into the exhaust pipe. After waiting for one minute, the user checks the air pressure value displayed on the screen again. If the displayed pressure value deviates from the initial air pressure value by ±10 Pa, the exhaust pipe is considered to be defective due to insufficient air tightness. This invention provides a convenient and effective way for users to perform air tightness testing on exhaust pipes, significantly improving the accuracy of such testing. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of the device for testing the airtightness of products;

[0015] Figure 2 A schematic diagram of the structure of a device for testing the airtightness of a product with an exhaust pipe in place;

[0016] Figure 3 This is a schematic diagram of the structure of the pressure sensor and the exhaust pipe.

[0017] Figure 4 This is a schematic diagram of the inflation head and the exhaust pipe.

[0018] Explanation of reference numerals in the attached figures:

[0019] 100. Device for testing product airtightness; 10. Support frame; 20. Support base; 201. Groove; 30. Display and control screen; 301. Wiring; 302. Air pressure sensor; 3021. First silicone layer; 40. Air pump; 401. Air supply pipe; 402. Inflation head; 4021. Second silicone layer; 403. Control switch; 50. First winding hook; 60. Second winding hook; 70. Lockable universal wheel; 80. Handle; 90. Exhaust pipe; 901. Air inlet; 902. Air outlet. Detailed Implementation

[0020] 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.

[0021] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0022] Please refer to the following: Figures 1 to 4 As shown, Figure 1 A schematic diagram of the overall structure of the device 100 for testing the airtightness of a product; Figure 2 A schematic diagram of the structure of the device 100 for testing the airtightness of a product with an exhaust pipe 90 placed inside; Figure 3 This is a schematic diagram of the structure of the pressure sensor 302 and the exhaust pipe 90; Figure 4 This is a schematic diagram of the structure of the inflation head 402 and the exhaust pipe 90.

[0023] This utility model provides the following technical solution: a device 100 for detecting the airtightness of a product, including a support frame 10, two support seats 20 symmetrically welded to the top of the support frame 10, the two support seats 20 being used to jointly support an exhaust pipe 90; a display and control screen 30 is provided on the support frame 10, the display and control screen 30 is connected to a pressure sensor 302 via a line 301, the pressure sensor 302 being used to be inserted into the air inlet 901 of the exhaust pipe 90; an air pump 40 is provided on the inner side of the support frame 10, a control switch 403 is provided on the support frame 10, the control switch 403 is electrically connected to the air pump 40, the air pump 40 is connected to an inflation head 402 via an air supply pipe 401, the inflation head 402 being used to be inserted into the air outlet 902 of the exhaust pipe 90.

[0024] In the device 100 for testing the airtightness of a product provided in this embodiment, when testing the airtightness of the exhaust pipe 90, the user places the exhaust pipe 90 on two support seats 20 so that the two support seats 20 jointly support the exhaust pipe 90 for airtightness testing. Then, the user inserts a pressure sensor 302 into the air inlet 901 of the exhaust pipe 90. When the pressure sensor 302 is inserted into the air inlet 901 of the exhaust pipe 90, it can block and seal the air inlet 901. The user also inserts an inflation head 402 into the air outlet 902 of the exhaust pipe 90. When the inflation head 402 is inserted into the air outlet 902 of the exhaust pipe 90, it can block and seal the air outlet 902. Then, the user operates the control switch 403 to control the air pump 40 to run. When the air pump 40 runs, it fills the air outlet 902 of the exhaust pipe 90 with air. The air pump 402 injects a certain amount of air pressure into the exhaust pipe 90. After injection, the user operates the control switch 403 to control the air pump 40 to stop injecting air pressure into the exhaust pipe 90. At this time, the air pressure sensor 302, which is inserted into the air inlet 901 of the exhaust pipe 90, monitors the air pressure value inside the exhaust pipe 90 in real time. The air pressure sensor 302 transmits the real-time air pressure value inside the exhaust pipe 90 to the display screen 30 for display. The user records the air pressure value displayed on the display screen 30 when the air pump 40 has injected air pressure into the exhaust pipe 90. After waiting for 1 minute, the user checks the air pressure value displayed on the screen again. If the air pressure value displayed at this time deviates from the air pressure value when the air pump 40 has injected air pressure into the exhaust pipe 90 by ±10Pa, it means that the exhaust pipe 90 is a product with unqualified air tightness. This invention provides a convenient and effective way for users to perform airtightness testing on the exhaust pipe 90, thereby significantly improving the accuracy of the airtightness testing of the exhaust pipe 90.

[0025] In some embodiments, the top of each of the two support bases 20 is provided with a groove 201 for accommodating a portion of the exhaust pipe 90.

[0026] In specific implementation: The top of each of the two support seats 20 is provided with a groove 201 to accommodate the lower two sides of the exhaust pipe 90 respectively, so that the exhaust pipe 90 will not roll when placed on the two support seats 20, so as to facilitate the user to perform the airtightness test procedure on the exhaust pipe 90.

[0027] In some embodiments, a first silicone layer 3021 is fixedly provided on the outer surface of the pressure sensor 302. When the pressure sensor 302 is inserted into the air inlet 901 of the exhaust pipe 90, the first silicone layer 3021 on the outer surface of the pressure sensor 302 is used to abut against the inner wall of the exhaust pipe 90.

[0028] In specific implementation: the first silicone layer 3021 on the outer surface of the pressure sensor 302 abuts against the inner wall of the exhaust pipe 90, so that the pressure sensor 302 can block and seal the air inlet 901 of the exhaust pipe 90.

[0029] In some embodiments, a second silicone layer 4021 is fixedly provided on the outer surface of the inflation head 402. When the inflation head 402 is inserted into the air outlet 902 of the exhaust pipe 90, the second silicone layer 4021 on the outer surface of the inflation head 402 is used to abut against the inner wall of the exhaust pipe 90.

[0030] In specific implementation: the second silicone layer 4021 on the outer surface of the inflation head 402 abuts against the inner wall of the exhaust pipe 90, so that the inflation head 402 can block and seal the air outlet 902 of the exhaust pipe 90.

[0031] In some embodiments, the support frame 10 is provided with a first winding hook 50, which is used for winding the wire 301.

[0032] In practice: when the pressure sensor 302 is not in use, the user can wind the wire 301 around the first winding hook 50 to store the wire 301.

[0033] In some embodiments, the support frame 10 is provided with a second winding hook 60 for winding the gas pipe 401.

[0034] In practice: when the inflation head 402 is not in use, the user can wrap the air supply pipe 401 around the second winding hook 60 to store the air supply pipe 401.

[0035] In some embodiments, the bottom of the support frame 10 is provided with a plurality of lockable casters 70, and the front side of the support frame 10 is provided with a handle 80.

[0036] In practice: when it is necessary to move the entire support frame 10, the user can unlock the lockable casters 70 at the bottom of the support frame 10, and then pull the handle 80 to move the support frame 10.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for detecting the air tightness of a product, characterized in that, The device includes a support frame with two symmetrically welded support bases on its top, which together support the exhaust pipe. A display and control screen is mounted on the support frame, connected via wiring to a pressure sensor, which is inserted into the air inlet of the exhaust pipe. An air pump is located inside the support frame, and a control switch is mounted on the support frame, electrically connected to the air pump. The air pump is connected to an inflation head via an air supply pipe, which is inserted into the air outlet of the exhaust pipe.

2. The apparatus for detecting the gas tightness of a product according to claim 1, characterized in that, Both of the support bases have a groove on their tops for accommodating a portion of the exhaust pipe.

3. The apparatus of claim 1, wherein, The outer surface of the pressure sensor is fixedly provided with a first silicone layer. When the pressure sensor is inserted into the air inlet of the exhaust pipe, the first silicone layer on the outer surface of the pressure sensor is used to abut against the inner wall of the exhaust pipe.

4. The apparatus of claim 1, wherein, The outer surface of the inflation head is fixedly provided with a second silicone layer. When the inflation head is inserted into the air outlet of the exhaust pipe, the second silicone layer on the outer surface of the inflation head is used to abut against the inner wall of the exhaust pipe.

5. The apparatus of claim 1, wherein, The support frame is provided with a first winding hook, which is used for winding the wire.

6. The apparatus of claim 1, wherein, The support frame is provided with a second winding hook, which is used for winding the gas pipeline.

7. The apparatus of claim 1, wherein, The bottom of the support frame is provided with several lockable casters, and the front of the support frame is provided with a handle.

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