Automobile carbon tank test system with accurate detection

Abstract

The utility model belongs to the technical field of automobile carbon tank detection, and particularly relates to an automobile carbon tank test system with accurate detection. The device comprises a balance and a test support frame installed on the balance. The carbon tank is placed on the test support frame; one end of the first anti-permeation rubber pipe is communicated with an automobile exhaust outlet gas path, and the other end is communicated with a carbon tank gas path through a second anti-permeation rubber pipe; each of the first anti-permeation rubber pipe and the second anti-permeation rubber pipe comprises a fluororubber pipe and a silicone rubber pipe sleeving the outer side of the fluororubber pipe; and the contact surfaces of the fluororubber tube and the silicone rubber tube are connected through glue or thermoplastic. The inner-layer pipes of the first anti-permeation rubber pipe and the second anti-permeation rubber pipe adopt fluorine rubber pipes without hydrocarbon permeation, and the outer-layer pipes adopt silicon rubber pipes with good flexibility and elasticity, so that the rubber pipes are ensured to have good flexibility and elasticity, the problem that gaseous hydrocarbon seeps out of the rubber pipes in the prior art is solved, the service life of the rubber pipes is prolonged, and the service life of the rubber pipes is prolonged. And the detection accuracy is ensured to a great extent.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile carbon canister detection, and in particular relates to an automobile carbon canister testing system with accurate detection. Background Art

[0002] At normal temperature, a car's fuel tank is often filled with gasoline vapor. When the temperature and pressure of a gasoline car's fuel tank change, a large amount of gasoline vapor will be discharged into the atmosphere through the vent. The gas discharged into the atmosphere often contains hydrocarbons volatilized from incomplete combustion of the fuel, causing harm to the environment.

[0003] In the actual automobile exhaust process, the automobile carbon canister test system is a very important test equipment to prevent air pollution. Its purpose is to detect the ability of the automobile carbon canister to absorb the volatile hydrocarbons of the fuel and the repeatability of the carbon canister's absorption capacity. The existing automobile carbon canister test system adopts an online balance weighing method and uses six flexible ventilation rubber tubes to connect the carbon canister to the automobile exhaust outlet. The flexible ventilation rubber tubes actually used have more or less gaseous hydrocarbon penetration. The amount of hydrocarbon penetration will affect the adsorption and desorption of the carbon canister, causing test deviations, thereby making the measurement accuracy of the automobile carbon canister test system low. Utility Model Content

[0004] The utility model aims to overcome the defect of measurement deviation caused by gaseous hydrocarbon penetration in the flexible vent rubber tube in the prior art, and provides an automobile carbon canister test system that can accurately detect and avoid the occurrence of gaseous hydrocarbon penetration.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] An accurate automobile carbon canister testing system, comprising:

[0007] a balance and a test support frame mounted on said balance;

[0008] A carbon canister is placed on the test support frame;

[0009] A first anti-permeation hose, one end of which is connected to the automobile exhaust outlet gas path, and the other end of which is connected to the carbon canister gas path through a second anti-permeation hose;

[0010] The first anti-permeation rubber hose and the second anti-permeation rubber hose both include a fluororubber tube and a silicone rubber tube sleeved outside the fluororubber tube.

[0011] Further, the test support frame includes a bracket for placing the carbon canister and a fastening support mounted on the bracket;

[0012] The connecting ends of the first anti-permeation rubber hose and the second anti-permeation rubber hose are tightly connected and communicated through a hose clamp, and the connecting ends of the first anti-permeation rubber hose and the second anti-permeation rubber hose are arranged on the fastening support.

[0013] Furthermore, the contact surfaces of the fluororubber hose and the silicone rubber hose are connected by gluing or thermoplastic; the fluororubber hose does not have gaseous hydrocarbon permeability.

[0014] Furthermore, a level adjustment mechanism for adjusting the level of the first anti-permeation rubber hose is arranged on the vehicle body or other platforms corresponding to the first anti-permeation rubber hose.

[0015] Furthermore, the level adjustment mechanism includes a level adjustment machine arranged on the vehicle body or other platforms and a level for detecting the inclination direction and inclination angle of the first anti-permeation rubber hose.

[0016] Furthermore, when the level adjustment mechanism is in use, the level is arranged in parallel with the first anti-permeation rubber hose to detect the inclination direction and inclination angle of the first anti-permeation rubber hose; the level adjustment machine performs level adjustment according to the inclination direction and inclination angle of the first anti-permeation rubber hose.

[0017] Furthermore, the first anti-permeation rubber hose is installed and connected to the level adjustment machine through a hose fixing clip.

[0018] Even further, during the detection, the first anti-permeation rubber hose and the second anti-permeation rubber hose are on the same horizontal plane.

[0019] The beneficial effect of a precise detection automotive carbon canister test system of the present utility model is:

[0020] In the present utility model, a first anti-permeation rubber hose and a second anti-permeation rubber hose that are interconnected are arranged between the automotive exhaust outlet and the carbon canister on a balance, and the carbon canister and the two rubber hoses are supported by a test support frame, thereby ensuring the relative level of the two rubber hoses. The inner layer of the first anti-permeation rubber hose and the second anti-permeation rubber hose uses a fluororubber hose without hydrocarbon penetration, and the outer layer uses a silicone rubber hose with good flexibility and elasticity. While ensuring that the rubber hose has good softness and elasticity, the problem of gaseous hydrocarbon leakage from the rubber hose in the prior art is solved, and the detection accuracy is guaranteed to a large extent.

[0021] In the present utility model, a level adjustment mechanism is arranged on the automotive vehicle body or other platforms corresponding to the first anti-permeation rubber hose, and the level adjustment mechanism is used to adjust the horizontal plane of the first anti-permeation rubber hose, avoiding the tension generated by the deformation of the rubber hose due to the change of the gas pressure in the carbon canister, increasing the additional vertical pressure generated by the balance detection, and preventing misreading and misjudgment in the balance detection, further ensuring the detection accuracy. Description of the Drawings

[0022] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Figure 1 It is a schematic structural diagram of an automotive carbon canister test system according to an embodiment of the present utility model.

[0024] Figure 2 It is a schematic structural diagram of a first anti-permeation rubber hose according to an embodiment of the present utility model.

[0025] Figure 3 It is a schematic structural diagram of a prior art rubber hose generating an additional vertical pressure in an embodiment of the present utility model.

[0026] Figure 4 It is a detailed installation diagram of a horizontal adjustment machine and a first anti-permeation rubber hose according to an embodiment of the present utility model.

[0027] In the figure: 1, balance; 2, test support frame, 21, support, 22, fastening support, 221, fastening pipe; 3, carbon canister; 4, first anti-permeation rubber hose, 41, fluororubber hose, 42, silicone rubber hose; 5, second anti-permeation rubber hose; 6, horizontal adjustment mechanism, 61, horizontal adjustment machine, 62, level gauge, 63, rubber hose fixing clip. Specific Embodiments

[0028] The present utility model will now be further described in detail in conjunction with the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, and therefore only showing the components related to the present utility model.

[0029] As Figures 1 - 4 shown in a specific embodiment of an automotive carbon canister test system with accurate detection of the present utility model, including: a balance 1 and a test support frame 2, a carbon canister 3, a first anti-permeation rubber hose 4, and a second anti-permeation rubber hose 5 installed on the balance 1. The carbon canister 3 is placed on the test support frame 2. One end of the first anti-permeation rubber hose 4 is communicated with the automotive exhaust gas outlet gas path, and the other end is communicated with the carbon canister 3 gas path through the second anti-permeation rubber hose 5. Both the first anti-permeation rubber hose 4 and the second anti-permeation rubber hose 5 include a fluororubber hose 41 and a silicone rubber hose 42 sleeved outside the fluororubber hose 41. In this embodiment, the contact surface between the fluororubber hose 41 and the silicone rubber hose 42 is connected by gluing or thermoplastic.

[0030] The rubber hoses used in the prior art all have more or less gaseous hydrocarbon permeability, and the amount of hydrocarbon penetration will affect the adsorption and desorption amounts of the carbon canister 3, thus causing deviations in the test. In this embodiment, a first anti-permeation rubber hose 4 and a second anti-permeation rubber hose 5 that are interconnected are arranged on the balance 1 between the automobile exhaust outlet and the carbon canister 3, and the carbon canister 3 and the two rubber hoses are supported by the test support frame 2, so as to ensure the relative level of the two rubber hoses. The inner layer tube of the first anti-permeation rubber hose 4 and the second anti-permeation rubber hose 5 is made of a fluororubber tube 41 without gaseous hydrocarbon permeability, and the outer layer tube is made of a silicone rubber tube 42 with good flexibility and elasticity. While ensuring that the rubber hose has good softness and elasticity, the problem of gaseous hydrocarbon leakage from the rubber hose in the prior art is solved, and the accuracy of the detection is ensured to a large extent.

[0031] That is, the first anti-permeation rubber hose 4 and the second anti-permeation rubber hose 5 in this embodiment are a special composite rubber hose. The inner layer is a fluororubber tube 41 without hydrocarbon penetration, and the outer layer is a silicone rubber tube 42 with good elasticity, avoiding the problem of inaccurate detection caused by hydrocarbon penetration of the rubber hose in the prior art.

[0032] As Figure 1 shown, the test support frame 2 in this embodiment includes a bracket 21 for placing the carbon canister 3 and a fastening support 22 installed on the bracket 21; the connection ends of the first anti-permeation rubber hose 4 and the second anti-permeation rubber hose 5 are tightly connected through a pipe clamp, and the connection ends of the first anti-permeation rubber hose 4 and the second anti-permeation rubber hose 5 are arranged on the fastening support 22. In the specific installation process, the first anti-permeation rubber hose 4 and the second anti-permeation rubber hose 5 are sleeved with each other to ensure that the inner cavity gas paths of the two rubber hoses are connected. The outer sides of the joints of the two rubber hoses are tightly contacted by a pipe clamp to prevent gas from escaping from the joints of the two.

[0033] Because the ventilation rubber hoses all have different tensions, during the on-line test process, the rubber hose inhales and exhales for a while, and the expansion and contraction of the pipeline itself will generate tension. Due to the existence of the tension conduction error of the rubber hose, since the carbon canister 3 measurement uses on-line measurement, the measured carbon canister 3 is connected to the measurement balance 1 through an elastic rubber hose. The change in the gas pressure of the carbon canister 3 will cause the rubber hose to deform, and the tension generated by the deformation of the rubber hose can cause an additional vertical pressure F2 on the measurement of the measurement balance 1. As Figure 4 shown, the balance 1 will misread and misjudge.

[0034] To solve this problem, in this embodiment, a horizontal adjustment mechanism 6 for adjusting the level of the first anti-permeation rubber hose 4 is arranged on the vehicle body or other platforms corresponding to the first anti-permeation rubber hose 4; the horizontal adjustment mechanism 6 includes a horizontal adjustment machine 61 arranged on the vehicle body or other platforms and a level 62 for detecting the inclination direction and inclination angle of the first anti-permeation rubber hose 4.

[0035] Specifically, when the horizontal adjustment mechanism 6 is in use, the spirit level 62 is arranged in parallel with the first anti-permeation rubber tube 4 to detect the inclination direction and inclination angle of the first anti-permeation rubber tube 4; the horizontal adjustment mechanism 61 makes horizontal adjustment according to the inclination direction and inclination angle of the first anti-permeation rubber tube 4.

[0036] That is, the connection end point of the balance 1 and the connection end point of the first anti-permeation rubber tube 4 are located on the same horizontal line, and there is no contact point with the solid in the middle of the first anti-permeation rubber tube 4. Even if the first anti-permeation rubber tube 4 generates additional tension due to the change of the ventilation pressure, the influence on the balance 1 is horizontal and will not generate additional vertical force on the measurement, thus eliminating the tension error of the rubber tube.

[0037] In the utility model, a horizontal adjustment mechanism 6 is arranged on the vehicle body or other platforms corresponding to the first anti-permeation rubber tube 4, and the horizontal adjustment mechanism 6 is used to adjust the horizontal plane of the first anti-permeation rubber tube 4, so as to avoid the tension caused by the deformation of the rubber tube due to the change of the gas pressure in the carbon canister 3, increase the additional vertical pressure generated by the detection of the balance 1, and prevent the situation of misreading and misjudgment in the detection of the balance 1. The setting of the horizontal adjustment mechanism 6 in this embodiment further ensures the accuracy of the detection.

[0038] It should be understood that the specific embodiments described above are only used to explain the utility model and are not used to limit the utility model. The obvious changes or variations derived from the spirit of the utility model are still within the protection scope of the utility model.

Claims

1. An automobile carbon canister testing system with high detection accuracy, characterized in that: include: A balance (1) and a test support frame (2) mounted on the balance (1); A carbon canister (3) is placed on the test support frame (2); A first anti-permeation hose (4), one end of which is connected to the gas path of the automobile exhaust outlet, and the other end of which is connected to the gas path of the carbon canister (3) through a second anti-permeation hose (5); The first anti-permeation rubber hose (4) and the second anti-permeation rubber hose (5) both comprise a fluororubber tube (41) and a silicone rubber tube (42) sleeved on the outside of the fluororubber tube (41).

2. The automobile carbon canister testing system with accurate detection according to claim 1, characterized in that: The test support frame (2) comprises a support (21) for placing the carbon canister (3) and a fastening support (22) mounted on the support (21); The connecting ends of the first anti-permeation hose (4) and the second anti-permeation hose (5) are tightly connected via a hose clamp, and the connecting ends of the first anti-permeation hose (4) and the second anti-permeation hose (5) are arranged on the fastening support (22).

3. The automobile carbon canister testing system with accurate detection according to claim 2 is characterized by: The contact surfaces of the fluororubber tube (41) and the silicone rubber tube (42) are connected by gluing or thermoplasticization; the fluororubber tube (41) does not have gaseous hydrocarbon permeability.

4. The automobile carbon canister testing system with accurate detection according to claim 1, characterized in that: A level adjustment mechanism (6) for adjusting the level of the first anti-permeation hose (4) is provided on the vehicle body or other platform corresponding to the first anti-permeation hose (4).

5. The automobile carbon canister testing system with accurate detection according to claim 4 is characterized by: The level adjustment mechanism (6) comprises a level adjustment machine (61) arranged on a vehicle body or other platform and a level meter (62) for detecting the tilt direction and tilt angle of the first anti-permeation hose (4).

6. The automobile carbon canister testing system with accurate detection according to claim 5, characterized in that: When the level adjustment mechanism (6) is in use, the level meter (62) is arranged parallel to the first anti-permeation hose (4) to detect the tilt direction and tilt angle of the first anti-permeation hose (4); and the level adjustment machine (61) performs level adjustment according to the tilt direction and tilt angle of the first anti-permeation hose (4).

7. The automobile carbon canister testing system with accurate detection according to claim 4 is characterized by: The first anti-permeation rubber hose (4) is installed and connected to the level adjustment machine (61) via a rubber hose fixing clamp (63).

8. An automobile carbon canister testing system with high detection accuracy according to any one of claims 1 to 7, characterized in that: During the test, the first anti-permeation rubber hose (4) and the second anti-permeation rubber hose (5) are located on the same horizontal plane.

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