A welding seam detection device for automobile exhaust pipe

Abstract

The utility model discloses a welding seam detection device for automobile exhaust pipe, which relates to the technical field of detection devices. In view of the problem that the detection method through ventilation in the prior art is difficult to determine the position of the leakage hole on the automobile exhaust pipe, and it is also difficult to determine whether the reason for the reduced air tightness of the exhaust pipe is caused by welding leakage or the hole of the exhaust pipe itself, the following scheme is proposed, including a fixed shell, in which a ventilation pipe and a drain pipe are respectively inserted and connected, and the two ends of the drain pipe are respectively connected with a first sealing mechanism and a second sealing mechanism. The utility model inserts the device into the automobile exhaust pipe, and the first sealing mechanism and the second sealing mechanism are located on both sides of the weld, and then the air pump is used to inflate the ventilation pipe through the first hose, and the gas in the ventilation pipe is inflated into the airbag through the exhaust nozzle, so that the airbag expands after inflation to seal the inner wall of the automobile exhaust pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a welding seam detection device for an automobile exhaust pipe. Background Art

[0002] The exhaust pipe generally includes the front exhaust pipe and the rear exhaust pipe. The automobile exhaust bellows is also called the automobile exhaust pipe hose. It is installed in the exhaust pipe between the engine exhaust branch pipe and the muffler, making the entire exhaust system flexibly connected, thereby reducing vibration and noise, facilitating installation and extending the life of the exhaust muffler system. Most automobile exhaust pipes are welded after processing plates and pipes. The welded pipes cannot fundamentally guarantee the welding quality and sealing performance, so it is necessary to conduct air tightness testing on the produced exhaust pipes;

[0003] When testing the exhaust pipe of an automobile, the two ends of the exhaust pipe can be blocked and then tested by ventilation. The air flow of the gas transmission device can be used to determine whether the air tightness of the exhaust pipe meets the requirements.

[0004] However, it is difficult for workers to observe the location of gas leakage during inspection, making it difficult to determine the location of the leaking hole on the automobile exhaust pipe. In addition, there are cases of welding leaks at the joints during inspection. The ventilation inspection method makes it difficult to determine whether the reduced air tightness of the exhaust pipe is caused by welding leaks or by holes in the exhaust pipe itself. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a vehicle exhaust pipe weld detection device, which overcomes the shortcomings of the prior art and effectively solves the problem that the prior art detection method through ventilation is difficult to determine the location of the leakage hole on the vehicle exhaust pipe, and is also difficult to determine whether the reason for the reduced air tightness of the exhaust pipe is due to welding leakage or due to the holes in the exhaust pipe itself.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A vehicle exhaust pipe weld detection device comprises a fixed shell, wherein a vent pipe and a drain pipe are respectively inserted and connected in the fixed shell, and both ends of the drain pipe are respectively connected to a first sealing mechanism and a second sealing mechanism, and the first sealing mechanism and the second sealing mechanism each comprise an air bag, a first baffle plate and a second baffle plate arranged on both sides of the air bag, and an air outlet component fixed between the first baffle plate and the second baffle plate, and the air outlet component comprises a round block and an exhaust nozzle inserted and fixed on the top of the round block, one end of the vent pipe is connected to a first hose, and one end of the first hose is connected to an air pump, and one end of the drain pipe is connected to a second hose, and the second hose is connected to a water pump.

[0008] The device is inserted into the exhaust pipe of an automobile, and the first sealing mechanism and the second sealing mechanism are located on both sides of the weld. Then, an air pump is used to inflate the ventilation pipe through the first hose. The gas in the ventilation pipe is inflated into the airbag through the exhaust nozzle, so that the airbag expands after inflation to seal the inner wall of the automobile exhaust pipe. Then, a water pump is used to inject water into the drain pipe through the second hose, so that the water flow fills the space between the first sealing mechanism and the second sealing mechanism. When water seeps out from the weld of the automobile exhaust pipe, it indicates that the weld of the automobile exhaust pipe is unqualified, otherwise it is qualified.

[0009] Preferably, a first plug hole is formed on one side outer wall of the first baffle, one side outer wall of the round block and one side outer wall of the second baffle in the second sealing mechanism, and the inner diameter of the first plug hole is matched with the outer diameter specification of the ventilation pipe.

[0010] The ventilation pipe is plug-connected with the first sealing mechanism and the second sealing mechanism along the first insertion hole.

[0011] Preferably, the bottom end of the exhaust nozzle extends into the first plug hole, and the bottom end of the exhaust nozzle is plug-connected and connected to the ventilation pipe, and the top end of the exhaust nozzle is plug-connected and connected to the airbag.

[0012] The airbag is plug-connected to the vent pipe via an exhaust nozzle.

[0013] Preferably, the first baffle plate, the second baffle plate and the round block in the second sealing mechanism are all provided with a second insertion hole, and the inner diameter of the second insertion hole is matched with the outer diameter specification of the drain pipe.

[0014] The drain pipe is plugged and fixed with the second sealing mechanism through the second plug hole.

[0015] Preferably, the structure of the airbag after inflation is cylindrical, and the outer ring of the airbag is connected to a sealing ring.

[0016] The airbag expands after being inflated to seal the inner wall of the automobile exhaust pipe.

[0017] Preferably, the water pump is connected to an external water source.

[0018] The water pump performs sealing detection on the weld of the automobile exhaust pipe by conveying water from an external water source to between the first sealing mechanism and the second sealing mechanism.

[0019] The beneficial effects of the utility model are:

[0020] The device is inserted into the exhaust pipe of an automobile, and the first sealing mechanism and the second sealing mechanism are located on both sides of the weld. Then, an air pump is used to inflate the ventilation pipe through the first hose, and the gas in the ventilation pipe is inflated into the airbag through the exhaust nozzle, so that the airbag expands after inflation to seal the inner wall of the automobile exhaust pipe. Then, a water pump is used to inject water into the drain pipe through the second hose, so that the water flow fills the space between the first sealing mechanism and the second sealing mechanism. When water seeps out from the weld of the automobile exhaust pipe, it indicates that the weld of the automobile exhaust pipe is unqualified, otherwise it is qualified. This effectively solves the problem that it is difficult to determine the position of the leakage hole on the automobile exhaust pipe through the ventilation detection method in the prior art, and it is also difficult to determine whether the reason for the reduced air tightness of the exhaust pipe is due to welding leakage or due to the holes in the exhaust pipe itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a welding seam detection device for an automobile exhaust pipe proposed by the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of an exhaust assembly of a vehicle exhaust pipe weld detection device proposed by the utility model;

[0023] Figure 3 The utility model provides a structural schematic diagram of a sealing mechanism of a welding seam detection device for an automobile exhaust pipe.

[0024] In the figure: 1. fixed shell; 2. ventilation pipe; 3. drainage pipe; 4. first sealing mechanism; 5. second sealing mechanism; 6. air bag; 7. first baffle; 8. air outlet assembly; 9. second baffle; 10. round block; 11. exhaust pipe; 12. first plug hole; 13. second plug hole; 14. first hose; 15. air pump; 16. second hose; 17. water pump. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Example:

[0027] Reference Figure 1-3, a vehicle exhaust pipe weld detection device, comprising a fixed shell 1, a vent pipe 2 and a drain pipe 3 are respectively inserted and inserted in the fixed shell 1, both ends of the drain pipe 3 are respectively connected with a first sealing mechanism 4 and a second sealing mechanism 5, the first sealing mechanism 4 and the second sealing mechanism 5 both include an air bag 6, a first baffle 7 and a second baffle 9 arranged on both sides of the air bag 6, and an air outlet component 8 fixed between the first baffle 7 and the second baffle 9, the air outlet component 8 includes a round block 10 and an exhaust nozzle 11 inserted and fixed on the top of the round block 10, one end of the vent pipe 2 is connected to a first hose 14, one end of the first hose 14 is connected to an air pump 15, one end of the drain pipe 3 is connected to a second hose 16, and the second hose 16 is connected to a water pump 17;

[0028] A first plug hole 12 is formed on one side outer wall of the first baffle plate 7, one side outer wall of the round block 10, and one side outer wall of the second baffle plate (9) in the second sealing mechanism 5. The inner diameter of the first plug hole 12 matches the outer diameter of the ventilation pipe 2. The ventilation pipe 2 is plugged and connected with the first sealing mechanism 4 and the second sealing mechanism 5 along the first plug hole 12. The bottom end of the exhaust nozzle 11 extends into the first plug hole 12. The bottom end of the exhaust nozzle 11 is plugged and connected with the ventilation pipe 2. The top end of the exhaust nozzle 11 is plugged and connected with the airbag 6. The airbag 6 is plugged and connected with the ventilation pipe 2 through the exhaust nozzle 11.

[0029] The first baffle plate 7, the second baffle plate 9 and the round block 10 in the second sealing mechanism 5 are all provided with a second plug hole 13, the inner diameter of the second plug hole 13 is adapted to the outer diameter specification of the drain pipe 3, the drain pipe 3 is plugged and fixed to the second sealing mechanism 5 through the second plug hole 13, the structure of the airbag 6 after inflation is cylindrical, the outer ring of the airbag 6 is connected to a sealing ring, the airbag 6 expands after inflation to seal the inner wall of the automobile exhaust pipe, the water pump 17 is connected to an external water source, the water pump 17 performs sealing detection on the weld of the automobile exhaust pipe by conveying water from the external water source to between the first sealing mechanism 4 and the second sealing mechanism 5.

[0030] Working principle:

[0031] During operation, the device is inserted into the exhaust pipe of an automobile, and the first sealing mechanism 4 and the second sealing mechanism 5 are located on both sides of the weld. Then, the air pump 15 is used to inflate the vent pipe 2 through the first hose 14. The gas in the vent pipe 2 is inflated into the airbag 6 through the exhaust nozzle 11, so that the airbag 6 expands after inflation to seal the inner wall of the automobile exhaust pipe. Then, the water pump 17 is used to inject water into the drain pipe 3 through the second hose 16, so that the water flow fills the space between the first sealing mechanism 4 and the second sealing mechanism 5. When water seeps out from the weld of the automobile exhaust pipe, it indicates that the weld of the automobile exhaust pipe is unqualified, otherwise it is qualified.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vehicle exhaust pipe weld detection device, comprising a fixed shell (1), characterized in that: A vent pipe (2) and a drain pipe (3) are inserted and inserted into the fixed shell (1), respectively; both ends of the drain pipe (3) are connected to a first sealing mechanism (4) and a second sealing mechanism (5), respectively; the first sealing mechanism (4) and the second sealing mechanism (5) both comprise an air bag (6), a first baffle (7) and a second baffle (9) arranged on both sides of the air bag (6), and an air outlet assembly (8) fixed between the first baffle (7) and the second baffle (9); the air outlet assembly (8) comprises a round block (10) and an exhaust nozzle (11) inserted and fixed to the top of the round block (10); one end of the vent pipe (2) is connected to a first hose (14), and one end of the first hose (14) is connected to an air pump (15); one end of the drain pipe (3) is connected to a second hose (16), and the second hose (16) is connected to a water pump (17).

2. The automobile exhaust pipe weld detection device according to claim 1, characterized in that: One side outer wall of the first baffle plate (7), one side outer wall of the round block (10) and one side outer wall of the second baffle plate (9) in the second sealing mechanism (5) are all provided with a first insertion hole (12), and the inner diameter of the first insertion hole (12) is compatible with the outer diameter specification of the ventilation pipe (2).

3. The automobile exhaust pipe weld detection device according to claim 2, characterized in that: The bottom end of the exhaust nozzle (11) extends into the first insertion hole (12), and the bottom end of the exhaust nozzle (11) is plugged and connected to the ventilation pipe (2), and the top end of the exhaust nozzle (11) is plugged and connected to the air bag (6).

4. The automobile exhaust pipe weld detection device according to claim 1, characterized in that: The first baffle plate (7), the second baffle plate (9) and the round block (10) in the second sealing mechanism (5) are all provided with a second insertion hole (13), and the inner diameter of the second insertion hole (13) is compatible with the outer diameter specification of the drainage pipe (3).

5. The automobile exhaust pipe weld detection device according to claim 1, characterized in that: The structure of the airbag (6) after being inflated is cylindrical, and the outer ring of the airbag (6) is connected to a sealing ring.

6. The automobile exhaust pipe weld detection device according to claim 1, characterized in that: The water pump (17) is connected to an external water source.

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