Air pressure airtightness testing device for exhaust manifold
By designing an air pressure and air tight test device for exhaust manifolds, the air tightness of the exhaust manifold is detected by using the sealing plug and the inflatable device, the problem of lack of specialized detection of the air tightness of the exhaust manifold in the prior art is solved, and the accurate detection of tiny leakage at the weld is achieved, ensuring the stability of engine performance.
Patent Information
- Application Number
- CN202421800958.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The prior art lacks a test device specifically for detecting the air pressure and tightness of exhaust manifolds, which makes it difficult to detect air leakage defects caused by inadequate welding.
An air pressure and air tight test device for exhaust manifold is designed, including a frame, a placing cylinder, a sealing plug and a seal. The sealing plug is embedded in the sealing groove through a sealing ring, the sealing plug drives the sealing plug and the intake end interface, the inflation device inflates and soaks the exhaust manifold in water, and visually detects whether there are bubbles at the welding.
Accurate measurement of tiny gas leakage at the exhaust manifold welding is achieved, ensuring the accuracy of the detection results, and avoiding the problem of affecting the engine power performance and fuel efficiency due to air leakage defects.
Smart Images
Figure CN222913003U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of exhaust pipe airtight detection, in particular to a pneumatic airtight test device for an exhaust manifold. Background Art
[0002] The exhaust pipe is an important part of the engine exhaust system. An automobile exhaust pipe generally consists of the following parts: an exhaust manifold, a shock-absorbing metal hose, a straight pipe, a muffler, etc. Among them, the exhaust manifold is fixed on the cylinder head of the engine, responsible for collecting the exhaust gas of each cylinder and guiding it into the subsequent exhaust pipe.
[0003] As an important part of the engine exhaust system, the airtightness of the exhaust manifold directly affects the power output of the engine. The existing exhaust manifold is a multi-port special-shaped metal part with a complex structure welded by multiple components, and it is easy to have air leakage defects due to insufficient welding. If there is a leak in the exhaust manifold, it will cause a decrease in exhaust pressure, thereby affecting the power performance and fuel efficiency of the engine. The exhaust manifold leak may also cause damage to other surrounding components (such as oxygen sensors, three-way catalytic converters, etc.). By detecting the airtightness, the overall performance of the exhaust system can be ensured to be stable and reliable. At present, there is no special pneumatic airtight test device for detecting exhaust manifolds. Summary of the Utility Model
[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides a pneumatic airtight test device for an exhaust manifold, which can effectively solve the problems existing in the above-mentioned prior art.
[0005] The technical solution of the utility model is as follows:
[0006] According to one aspect of the utility model, it includes: a frame, a placement cylinder, a sealing plug and a sealing member. The inner wall of the placement cylinder is provided with a sealing groove. The placement cylinder is fixed on the frame. The exhaust end pipe body of the exhaust manifold is inserted into the interior of the placement cylinder, and the sealing ring of the exhaust manifold is embedded in the sealing groove. The sealing plug is movably arranged on the frame towards the intake end of the exhaust manifold through a driving device; the oxygen sensor installation port of the exhaust manifold is blocked by the sealing member, and the intake end of the exhaust manifold is blocked by the sealing plug. The sealing plug is also provided with an intake channel, one end of which is connected to the intake end and the other end is equipped with an inflation device.
[0007] Further, the placement cylinder is obliquely fixed on the frame so that the intake end of the exhaust manifold is vertically upward.
[0008] Further, it also includes a support plate, which is used to support the connecting ear of the exhaust manifold. When the exhaust manifold is inserted into the placement cylinder, the connecting ear abuts against the support plate.
[0009] Further, the support plate is in a "concave" shape, and the placement cylinder is located below the "concave" notch.
[0010] Further, the driving device is a telescopic cylinder.
[0011] Further, the sealing member is sleeved outside the oxygen sensor mounting port.
[0012] Further, the sealing member is made of rubber or silica gel.
[0013] Further, a sleeve is fixedly provided outside the exhaust end pipe body of the exhaust end pipe body, the sealing ring is sleeved outside the sleeve, and a limiting convex edge is further provided on the inner wall of the placement cylinder; when the sealing ring is embedded in the sealing groove, the end face of the limiting convex edge facing the opening of the placement cylinder abuts against the sleeve.
[0014] Adopting the above technical solution, compared with the prior art, the beneficial effects of the present utility model are as follows:
[0015] In this solution, the sealing member is sleeved on the oxygen sensor mounting port, then the exhaust end pipe body is inserted into the placement cylinder, the sealing ring is clamped into the sealing groove, the air pump inflates the sealing plug, the gas enters the exhaust end pipe body through the air inlet channel, the telescopic cylinder drives the sealing plug to move towards the air inlet end, and the sealing plug fits with the air inlet end interface of the exhaust manifold. The lifting device drives the frame to move towards the water pool, so that the exhaust manifold is immersed in the water, and visually observe whether there are bubbles generated at the welded joints of each part of the exhaust manifold. If there are bubbles, it indicates that there is a leakage defect due to improper welding. If there are no bubbles, it indicates that the welding is in place and there is no leakage defect; it can accurately measure the minute gas leakage at the welded joints and ensure the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0017] Figure 1 is a schematic three-dimensional structure of the present utility model Figure 1 ;
[0018] Figure 2 is a schematic cross-sectional structure diagram of the present utility model;
[0019] Figure 3 is a schematic three-dimensional structure of the present utility model Figure 2 ;
[0020] Figure 4Schematic three - dimensional structure of the present utility model Figure 3 ;
[0021] Figure 5 is a schematic three - dimensional structure diagram of an exhaust manifold;
[0022] Figure 6 is a schematic structure diagram of the exhaust manifold inserted into the placement cylinder;
[0023] In the figure: base - 1, frame - 2, support plate - 3, placement cylinder - 4, limiting flange - 41, sealing groove - 42, sealing plug - 5, intake passage - 51, driving device - 6, sealing member - 7, exhaust manifold - A, intake end - A0, connecting ear - A1, oxygen sensor mounting port - A2, exhaust end pipe body - A3, sleeve - A4, sealing ring - A5. Detailed implementation manners
[0024] The following will further describe the present utility model in detail in conjunction with the drawings and embodiments. It should be specifically noted that the following embodiments are only used to illustrate the present utility model, but do not limit the scope of the present utility model. Similarly, the following embodiments are only partial embodiments of the present utility model rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.
[0025] As Figures 1 to 6 shown, this solution provides a pneumatic airtight testing device for an exhaust manifold.
[0026] Please refer to Figure 5 , the exhaust manifold A includes a connecting ear A1, an exhaust end pipe body A3 and a sleeve A4. The connecting ear A1 and the exhaust end pipe body A3 are welded together. The sleeve A4 is sleeved on the outer side wall of the exhaust end pipe body A3, and the sleeve A4 is welded and fixed to the exhaust end pipe body A3.
[0027] Please refer to Figures 1 to 6 , which includes a frame 2, a placement cylinder 4 and a sealing plug 5. The inner wall of the placement cylinder 4 is provided with a sealing groove 42. The placement cylinder 4 is fixed to the frame 2. Specifically, the placement cylinder 4 is obliquely fixed to the frame 2 so that the intake end A0 of the exhaust manifold A is vertically upward. The exhaust end pipe body A3 of the exhaust manifold A is inserted into the interior of the placement cylinder 4, and the sealing ring A5 of the exhaust manifold A is embedded in the sealing groove 42. The sealing plug 5 is movably arranged on the frame 2 towards the intake end of the exhaust manifold A through a driving device 6; and the sealing plug 5 fits with the interface of the intake end A0 of the exhaust manifold A. The driving device 6 includes but is not limited to a telescopic cylinder. The frame 2 further includes a base 1, and the base 1 is fixed on a lifting device (not shown in the figure), and the lifting device is used to immerse the frame 2 in water.
[0028] Please refer to Figure 2 , Figure 5and Figure 6 , further comprising a seal 7, the seal 7 is sleeved outside the oxygen sensor mounting port A2; the seal 7 is made of rubber or silica gel; the oxygen sensor mounting port A2 of the exhaust manifold A is blocked by the seal 7, and the sealing plug 5 blocks the intake end A0 of the exhaust manifold A. The sealing plug 5 is further provided with an intake passage 51. One end of the intake passage 51 is communicated with the intake end A0, and the other end is equipped with an inflation device (not shown in the figure). The inflation device includes, but is not limited to, an air pump.
[0029] Please refer to Figures 1 to 6 , further comprising a support plate 3, the support plate 3 is used to support the connecting ear A1 of the exhaust manifold A. When the exhaust manifold A is inserted into the placement cylinder 4, the connecting ear A1 abuts against the support plate 3. Specifically, the support plate 3 is in a "concave" shape, and the placement cylinder 4 is located below the "concave" notch.
[0030] Please refer to Figure 2 、 Figure 5 and Figure 6 , an outer sleeve A4 is fixedly provided outside the exhaust end pipe body A3 of the exhaust end pipe body A3. A sealing ring A5 is sleeved outside the outer sleeve A4. A limiting convex edge 41 is further provided on the inner wall of the placement cylinder 4; when the sealing ring A5 is embedded in the sealing groove 42, the end surface of the limiting convex edge 41 facing the opening of the placement cylinder 4 abuts against the outer sleeve A4.
[0031] Working principle: The seal 7 is sleeved on the oxygen sensor mounting port A2, and then the exhaust end pipe body A3 is inserted into the placement cylinder 4. The sealing ring A5 is snapped into the sealing groove 42, and the end surface of the limiting convex edge 41 facing the opening of the placement cylinder 4 abuts against the outer sleeve A4. And when the exhaust end pipe body A3 is inserted into the placement cylinder 4, the connecting ear A1 abuts against the support plate 3;
[0032] Start the air pump, and the air pump inflates the sealing plug 5. The gas enters the exhaust end pipe body A3 through the intake passage 51. Then start the telescopic cylinder, and the telescopic cylinder drives the sealing plug 5 to move towards the intake end A0, and the sealing plug 5 fits with the interface of the intake end A0 of the exhaust manifold A;
[0033] Finally, start the lifting device, and the lifting device drives the frame 2 to move towards the water pool, so that the exhaust manifold A is immersed in water. Check whether there are bubbles generated at the welded joints of each part of the exhaust manifold A by visual inspection. If there are bubbles, it means that the welding is not in place and there is a leakage defect. If there are no bubbles, it means that the welding is in place and there is no leakage defect.
[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. An exhaust manifold air pressure airtightness test device, characterized in that: The invention comprises a frame (2), a placement tube (4), a sealing plug (5) and a sealing member (7); the inner wall of the placement tube (4) is provided with a sealing groove (42); the placement tube (4) is fixedly arranged on the frame (2); the exhaust end tube body (A3) of the exhaust manifold (A) is inserted into the interior of the placement tube (4); and the sealing ring (A5) of the exhaust manifold (A) is embedded in the sealing groove (42); the sealing plug (5) is movably arranged on the frame (2) toward the air intake end of the exhaust manifold (A) through a driving device (6); the oxygen sensor installation port (A2) of the exhaust manifold (A) is blocked by the sealing member (7); the air intake end (A0) of the exhaust manifold (A) is blocked by the sealing plug (5); the air intake passage (51) is also provided with a gas intake passage (51); one end of the gas intake passage (51) is connected to the air intake end (A0); and the other end is equipped with a charging device.
2. The air pressure airtightness testing device for an exhaust manifold according to claim 1, characterized in that: The placement tube (4) is fixedly arranged on the frame (2) at an angle so that the air intake end (A0) of the exhaust manifold (A) faces vertically upward.
3. The air pressure airtightness testing device for an exhaust manifold according to claim 1, characterized in that: It also includes a support plate (3), wherein the support plate (3) is used to support a connection ear (A1) of the exhaust manifold (A); when the exhaust manifold (A) is inserted into the placement tube (4), the connection ear (A1) abuts against the support plate (3).
4. The air pressure airtightness testing device for an exhaust manifold according to claim 3, characterized in that: The support plate (3) is in a "concave" shape, and the placement tube (4) is located below the "concave" notch.
5. An exhaust manifold air pressure airtightness test device as claimed in claim 1 or 2, characterized in that: The driving device (6) is a telescopic cylinder.
6. The air pressure airtightness testing device for an exhaust manifold according to claim 5, characterized in that: The sealing member (7) is sleeved on the outside of the oxygen sensor installation opening (A2).
7. The air pressure airtightness testing device for an exhaust manifold according to claim 6, characterized in that: The sealing member (7) is made of rubber or silicone.
8. The air pressure airtightness testing device for an exhaust manifold according to claim 1, characterized in that: The exhaust end tube body (A3) is fixedly provided with a sleeve (A4) on the outside of the exhaust end tube body (A3), the sealing ring (A5) is sleeved on the outside of the sleeve (A4), and the inner wall of the placement tube (4) is also provided with a limiting convex edge (41); when the sealing ring (A5) is embedded in the sealing groove (42), the end surface of the limiting convex edge (41) facing the opening of the placement tube (4) abuts against the sleeve (A4).