Test connecting device for catalyst tail pipe

Abstract

The utility model provides a test connecting device for a catalytic converter tail pipe, which is high in assembly efficiency, effectively shortens test preparation time, reduces test cost and improves working efficiency, and comprises an inner guide seat, an outer guide seat and an outer guide seat, the inner guide seat comprises an inner guide pipe part, one end of the inner guide pipe part is provided with a limiting step, and the other end of the inner guide pipe part is provided with an outer guide pipe; one side of the limiting step is connected with a quick-assembly flange, and the quick-assembly flange is used for being connected with a rack exhaust pipeline; the outer guide pipe is arranged on the limiting step of the inner guide seat in a sleeving mode, a sealing ring is arranged between the outer guide pipe and the inner guide seat, a tail pipe fixing space is formed between the outer guide pipe and the inner guide seat, a cam pressing handle is installed on the outer guide pipe, and the cam pressing handle is connected with the sealing ring. A receding groove is formed in the position, corresponding to the cam portion of the cam pressing handle, of the outer guide pipe, and the cam portion of the cam pressing handle can press the tail pipe located in the tail pipe fixing space to the inner guide pipe by rotating the cam pressing handle.

Description

Technical Field

[0001] The utility model relates to the technical field of engine and vehicle testing, and particularly relates to a test connection device for a catalytic converter tail pipe. Background Art

[0002] During the bench and vehicle calibration tests, performance tests, and product consistency tests of the catalytic converter, different catalytic converters are frequently replaced for testing. Currently, when conducting bench or vehicle tests on the catalytic converter, it is often necessary to cut off the tail pipe of the catalytic converter to be tested and weld a flange that matches the bench exhaust pipe for the installation and testing of the catalytic converter. Such operations are time-consuming, laborious, and waste bench resources. Moreover, during cutting and welding operations, the test preparation time is long, the test efficiency is low, the labor intensity of personnel is high, and it may also cause harm to personnel.

[0003] Technicians also considered whether existing pipeline connection devices could be reused, but found that existing pipeline connection devices with male and female ends, such as a pipeline quick connector disclosed in the Chinese utility model patent with the publication number CN217328941U, could not be used for the tail pipe connection of catalytic converter testing. The reasons are as follows:

[0004] 1. Existing pipeline connection devices usually include a male end and a female end, and the male end and the female end are respectively connected to two pipelines. In order to connect with the pipelines, a locking device also needs to be additionally provided on the pipelines; moreover, neither the male end nor the female end can be adapted to the flange of the bench exhaust pipe;

[0005] 2. The wall of the tail pipe of the catalytic converter is very thin. After the existing pipeline connection device locks the pipeline, it directly causes the deformation of the tail pipe. The deformed tail pipe cannot be supported by the pipeline connection device, and the fixing effect on the tail pipe is poor, and it is easy to fall off.

[0006] In order to ensure the rapid development of the test, reduce the test preparation time, reduce the labor intensity of workers, reduce the test cost, and ensure the integrity of the state of the catalytic converter to be tested, etc., it is necessary to provide a test connection device for the catalytic converter tail pipe with good safety and high installation efficiency. Summary of the Utility Model

[0007] In view of the above problems, the utility model provides a test connection device for a catalytic converter tail pipe, which has high assembly efficiency, effectively shortens the test preparation time, reduces the test cost, and improves the work efficiency.

[0008] The technical solution is as follows: A test connection device for a catalytic converter tail pipe, characterized by comprising:

[0009] Inner guide seat, the inner guide seat includes an inner guide tube portion, one end of the inner guide tube portion is provided with a limiting step, one side of the limiting step is connected with a quick-install flange, and the quick-install flange is used for connecting the bench exhaust pipe;

[0010] Outer guide tube, the outer guide tube is sleeved on the limiting step of the inner guide seat, a sealing ring is arranged between the outer guide tube and the inner guide seat, a tail pipe fixing space is formed between the outer guide tube and the inner guide seat, a cam pressing handle is installed on the outer guide tube, and an avoidance groove is arranged on the outer guide tube corresponding to the cam portion of the cam pressing handle. Rotating the cam pressing handle, the cam portion of the cam pressing handle can press the tail pipe located in the tail pipe fixing space against the inner guide tube.

[0011] Furthermore, a screw hole is arranged on the outer guide tube, and a mounting hole corresponding to the screw hole is arranged on the limiting step. A screw passes through the mounting hole and extends into the screw hole to fix the outer guide tube and the inner guide seat together.

[0012] Furthermore, a through hole corresponding to the mounting hole is arranged on the sealing ring, and the screw passes through the through hole on the sealing ring to fix the sealing ring between the outer guide tube and the inner guide seat.

[0013] Furthermore, the width of the sealing ring is greater than the wall thickness of the outer guide tube, and the inner diameter of the sealing ring is smaller than the outer diameter of the inner guide tube portion so that a tight fit is formed between the sealing ring and the inner guide tube portion.

[0014] Furthermore, the sealing ring is made of a graphite composite gasket.

[0015] Furthermore, at least two cam pressing handles are provided.

[0016] Furthermore, mounting ear plates are arranged on the outer wall of the outer guide tube, and the cam pressing handle is installed on the mounting ear plates through a rotating shaft.

[0017] Furthermore, the screw is an internal hexagon countersunk head screw.

[0018] Furthermore, a blind plate is installed at the position of the quick-install flange, and the blind plate can block the tail pipe of the catalytic converter.

[0019] The test connection device for the catalytic converter tail pipe of the present utility model adopts the cooperation of an inner guiding seat and an outer guiding pipe. Through the cam pressing handle, the tail pipe inserted in the tail pipe fixing space can be pressed tightly against the inner guiding pipe, avoiding the deformation of the tail pipe caused by the extrusion of the cam part of the handle and preventing the tail pipe from falling off the test connection device. The end face of the tail pipe contacts the sealing ring, and the end face of the sealing ring is used for sealing, ensuring the effective sealing of the exhaust pipe line. In addition, since the sealing ring adopts a graphite composite gasket, it has the characteristic of high temperature resistance, which can ensure the connection reliability under the high temperature environment of tail gas emission. At the same time, the other end of the test connection device for the catalytic converter tail pipe of the present utility model is provided with a quick installation flange, which is convenient for the quick connection with the bench exhaust pipe line. The device is convenient, reliable, applicable and flexible in installation, adjustment and use. Using this device greatly improves the work efficiency, reduces the labor intensity and the test preparation time. It is convenient and fast to disassemble and assemble, can meet the installation and use requirements during different catalytic converter tests, and reduces the damage to the catalytic converter tail pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 6 is a perspective view of a test connection device for a catalytic converter tail pipe in a first perspective in an embodiment;

[0021] Figure 2 FIG. 10 is a perspective view of a test connection device for a catalytic converter tail pipe in a second perspective in an embodiment;

[0022] Figure 3 FIG. 14 is an exploded view of a test connection device for a catalytic converter tail pipe in an embodiment;

[0023] Figure 4 FIG. 18 is a schematic diagram of installing a test connection device for a catalytic converter tail pipe onto a catalytic converter in an embodiment;

[0024] Figure 5 FIG. 22 is a schematic diagram of the cooperation between a test connection device for a catalytic converter tail pipe and a tail pipe in an embodiment;

[0025] Figure 6 For Figure 5 the sectional view taken along line A-A of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] See Figures 1 to 6 , a test connection device for a catalytic converter tail pipe of the present utility model includes:

[0027] An inner guiding seat 100, the inner guiding seat includes an inner guiding pipe portion 101, one end of the inner guiding pipe portion 101 is provided with a limiting step 102, and one side of the limiting step 102 is connected with a quick installation flange 103. The quick installation flange 103 is used for connecting with the bench exhaust pipe line, effectively realizing a firm connection between the test connection device and the bench exhaust pipe line, and greatly simplifying the connection process with the bench exhaust pipe line;

[0028] The outer guide tube 200 is sleeved on the limiting step 102 of the inner guide seat. A sealing ring 300 is arranged between the outer guide tube 200 and the inner guide seat. A tail pipe fixing space is formed between the outer guide tube 200 and the inner guide seat 100. A cam pressing handle 201 is installed on the outer guide tube 200. There are two cam pressing handles 201, and the number can also be more, such as 3. An avoidance groove 202 is arranged on the outer guide tube 200 corresponding to the cam part of the cam pressing handle 201. By rotating the cam pressing handle 201, the cam part 203 of the cam pressing handle can press the tail pipe 1 located in the tail pipe fixing space against the inner guide tube 100, limit the movement of the catalytic converter tail pipe, and effectively prevent the test connection device from falling off. At the same time, when pressing downwards, the end face of the catalytic converter tail pipe and the graphite composite gasket are also made to fit more tightly, effectively ensuring the sealing of the pipeline. In the embodiment, the cam pressing handles 201 are symmetrically installed on the outer guide tube 200. The function of multiple cam pressing handles 201 can ensure that the catalytic converter tail pipe is connected more firmly.

[0029] The test connection device for the catalytic converter tail pipe in the embodiment realizes the quick connection of the catalytic converter tail pipe of this device with the bench or the vehicle catalytic converter through the inner guide seat and the outer guide tube. For the effect diagram after installation, see Figure 4 , the catalytic converter tail pipe is inserted into the tail pipe fixing space formed between the outer guide tube and the inner guide seat. Then, the catalytic converter tail pipe is tightly pressed against the inner guide seat by using the cam pressing handle, restricting the axial movement of the pipe. By using the tight fit between the graphite composite gasket and the end face of the tail pipe, the effective sealing of the exhaust pipe is ensured. At the same time, the device is equipped with a quick-install flange, which is convenient for connecting with the bench exhaust pipe. It not only improves the work efficiency but also reduces the test preparation time. And in the implementation, the installation, adjustment, and use process of the test connection device are convenient and reliable, reducing the labor intensity of the operator. And by using the test connection device in the embodiment, it can also play a role in protecting the tail pipe from damage and avoiding the need to damage the catalytic converter every time a test is conducted.

[0030] Although there are many models of catalytic converters for diesel engines currently produced, the sizes of their tail pipes are few. Currently, there are only two types, 76mm and 89mm. Therefore, the test connection device for the catalytic converter tail pipe in the embodiment also has good versatility and is compatible with multiple models of catalytic converters for diesel engines.

[0031] See Figure 3 , in an embodiment of the present invention, a screw hole 204 is arranged on the outer guide tube 200, and a mounting hole 104 corresponding to the screw hole 204 is arranged on the limiting step 102. A screw 205 passes through the mounting hole and extends into the screw hole 204 to fix the outer guide tube 200 and the inner guide seat 100 together.

[0032] For the convenience of fixing the sealing ring, in the embodiment, the sealing ring 300 is provided with a through hole 301 corresponding to the mounting hole 104, and the screw 205 passes through the through hole 301 on the sealing ring to fix the sealing ring 300 between the outer guide tube 200 and the inner guide seat 100.

[0033] In order to improve the sealing performance, in one embodiment, the width of the sealing ring 300 is increased. The width of the sealing ring 300 is greater than the wall thickness of the outer guide tube 200, and the inner diameter of the sealing ring 300 is smaller than the outer diameter of the inner guide tube portion 101, so that a tight fit is formed between the sealing ring 300 and the inner guide tube portion 101. In the embodiment, it is only necessary that the inner diameter of the sealing ring 300 is slightly smaller than the outer diameter of the inner guide tube portion 101. The specific dimensions are not limited herein, and only a tight fit is required, which can ensure that there are no sealing problems at the position where the sealing ring 300 contacts the inner guide tube portion 101, and the large width of the sealing ring enables the tail pipe to be in full contact with the sealing ring even if it is deformed.

[0034] In one embodiment, the sealing ring 300 is made of a graphite composite gasket. As a sealing element, the graphite composite gasket ensures the reliability of the connection in the high-temperature environment of the exhaust gas emission with its high-temperature resistance characteristics, and can effectively avoid the problem of seal failure caused by the damage of the sealing ring due to high temperature.

[0035] In one embodiment, mounting lugs 206 are provided on the outer wall of the outer guide tube 200, and the cam pressing handle 201 is installed on the mounting lugs 206 through a rotating shaft.

[0036] In one embodiment, the screw 205 is an internal hexagon countersunk head screw, which is used to connect the inner guide seat and the outer guide tube, facilitating the replacement of the graphite composite gasket. The combined connection is convenient for the processing and manufacturing of the components, facilitating the replacement and adjustment of the graphite composite gasket, and there is no operation interference for the hexagon countersunk head screw.

[0037] In one embodiment, a blind plate is also installed at the quick-release flange position in the device of the embodiment. The blind plate can block the tail pipe of the catalytic converter. By installing the blind plate at the quick-release flange, the tail pipe of the catalytic converter is sealed, facilitating the leakage inspection of the catalytic converter assembly.

[0038] In addition, it should be understood that although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard 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.

[0039] The technical principle of the present utility model has been described in combination with specific embodiments above. These descriptions are only for explaining the principle of the present utility model and cannot be construed as limiting the protection scope of the present utility model in any way. Based on the explanations herein, those skilled in the art can readily conceive of other specific embodiments of the present utility model without creative efforts, and these embodiments will fall within the protection scope of the present utility model.

Claims

1. A test connection device for a catalyst tail pipe, characterized in that: include: An inner guide seat, the inner guide seat comprising an inner guide tube portion, one end of the inner guide tube portion is provided with a limiting step, one side of the limiting step is connected to a quick-fit flange, and the quick-fit flange is used to connect the bench exhaust pipeline; An outer guide tube, the outer guide tube is sleeved on the limiting step of the inner guide seat, a sealing ring is arranged between the outer guide tube and the inner guide seat, a tail pipe fixing space is formed between the outer guide tube and the inner guide seat, a cam clamping handle is installed on the outer guide tube, and an avoidance groove is arranged on the outer guide tube corresponding to the cam portion of the cam clamping handle, and the cam portion of the cam clamping handle can be rotated to clamp the tail pipe located in the tail pipe fixing space onto the inner guide tube.

2. A test connection device for a catalyst tail pipe according to claim 1, characterized in that: The outer guide tube is provided with a screw hole, and the limiting step is provided with a mounting hole corresponding to the screw hole. The screw passes through the mounting hole and extends into the screw hole to fix the outer guide tube and the inner guide seat together.

3. A test connection device for a catalyst tail pipe according to claim 2, characterized in that: The sealing ring is provided with a through hole corresponding to the mounting hole, and a screw passes through the through hole on the sealing ring to fix the sealing ring between the outer guide tube and the inner guide seat.

4. A test connection device for a catalyst tail pipe according to claim 1, characterized in that: The width of the sealing ring is greater than the wall thickness of the outer guide tube, and the inner diameter of the sealing ring is smaller than the outer diameter of the inner guide tube portion, so that a tight fit is formed between the sealing ring and the inner guide tube portion.

5. A test connection device for a catalyst tail pipe according to claim 1, characterized in that: The sealing ring is a graphite composite gasket.

6. A test connection device for a catalyst tail pipe according to claim 1, characterized in that: At least two cam pressing handles are provided.

7. A test connection device for a catalyst tail pipe according to claim 1, characterized in that: A mounting ear plate is arranged on the outer wall of the outer guide tube, and the cam clamping handle is mounted on the mounting ear plate via a rotating shaft.

8. A test connection device for a catalyst tail pipe according to claim 2, characterized in that: The screws are hexagon socket countersunk screws.

9. A test connection device for a catalyst tail pipe according to claim 1, characterized in that: A blind plate is installed at the position of the quick-install flange, and the blind plate can block the tail pipe of the catalyst.

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