Tail gas emission device for special environment test

Abstract

The utility model relates to the technical field of tail gas emission treatment, in particular to a tail gas emission device for a special environment test, which comprises a surge tank, an inlet of the surge tank is connected with a cabin connecting pipe, and an outlet of the surge tank is respectively communicated with a low-pressure emission component and a normal-pressure emission component; the low-pressure discharge assembly comprises a low-pressure discharge pipeline and a vacuum pump, and the vacuum pump is communicated with the low-pressure discharge pipeline and the surge tank; the normal-pressure discharge assembly comprises a normal-pressure discharge pipeline and a fan, and the fan is communicated with the normal-pressure discharge pipeline and the surge tank; control valves are connected in series between the surge tank and the cabin body connecting pipe, between the surge tank and the fan, and between the surge tank and the vacuum pump. The special environment test device is used for solving the technical problems that in the prior art, tail gas emission of a special environment test device is not smooth, gas flows backwards, and the test accuracy is affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas emission treatment technical field especially a tail gas emission device for special environment test. BACKGROUND

[0002] The description in this section only provides background information related to the present disclosure and does not constitute prior art.

[0003] In the special environment test, because the test environment pressure of the vehicle is different, there are many environments such as normal pressure and low pressure, so when the vehicle environment test is carried out, the tail gas emission problem needs to be considered. The conventional tail gas emission is directly discharged through the predetermined pipeline, which has many problems, such as: unable to effectively discharge the tail gas under low pressure or high pressure environment, due to the pressure difference between the equipment environment and the tail gas emission environment, it is easy to exist tail gas leakage in the device internal environment, and the tail gas emission is not smooth, and the gas backflow phenomenon; in addition, the external pressure environment will also affect the test environment in the equipment, the traditional tail gas treatment system is difficult to maintain the pressure stability in the laboratory, and then affect the temperature, humidity and other parameter control in the test, this instability will lead to the test data deviation, unable to truly simulate the running state of the vehicle under actual conditions, affect the accuracy of the test result.

[0004] The patent application with the publication number CN114112403A and the name of a high-altitude simulation test device and method for performance of unmanned vehicle power package, by designing a low-gas test cabin, the whole cabin is wrapped outside the performance test table, setting the gas pressure adjusting unit, can adjust the low gas pressure value according to the need, so as to simulate different altitude; design engine tail gas low pressure treatment system, purify and discharge the tail gas generated after the engine works, according to the test demand, using the gas pressure adjusting unit, according to the working gas pressure of the low-gas test cabin, the corresponding adjustment is carried out, the tail gas discharge environment gas pressure is consistent with the low-gas test cabin gas pressure, the working state under the same altitude is simulated. However, the problem of poor simulation accuracy and accuracy caused by the low-gas cabin during tail gas emission is still not solved. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of tail gas emission device for special environment test, to solve the technical problems of existing technology in the tail gas emission of special environment test device, such as poor emission, gas backflow and influence test accuracy.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A tail gas emission device for special environment test, comprising:

[0008] The pressure stabilizing tank is connected with the cabin connecting pipe, and the outlet of the pressure stabilizing tank is connected with the low-pressure discharge assembly and the normal-pressure discharge assembly respectively.

[0009] The low-pressure discharge assembly comprises a low-pressure discharge pipeline and a vacuum pump connected with the low-pressure discharge pipeline and the pressure stabilizing tank.

[0010] The normal-pressure discharge assembly comprises a normal-pressure discharge pipeline and a fan connected with the normal-pressure discharge pipeline and the pressure stabilizing tank.

[0011] The control valves are connected in series between the pressure stabilizing tank and the cabin connecting pipe, between the pressure stabilizing tank and the fan, and between the pressure stabilizing tank and the vacuum pump.

[0012] Further, the vacuum pump is a Roots pump, and the control valve is a butterfly valve.

[0013] Further, a silencer is connected in series between the vacuum pump and the low-pressure discharge pipeline.

[0014] Further, a buffer assembly is connected in series between the cabin connecting pipe and the pressure stabilizing tank and between the pump-tank connecting pipe and the pressure stabilizing tank, and the buffer assembly is used for buffering the noise and amplitude caused by the vibration of the power equipment.

[0015] Further, the buffer assembly comprises a bellows, and the two ends of the bellows are connected with buffer flanges; fixed flanges are arranged on the cabin connecting pipe or the pump-tank connecting pipe; the buffer flanges at the two ends of the bellows are arranged on the fixed flanges; and a plurality of connecting bolts are arranged between the fixed flanges at the two ends of the bellows, and the two ends of each connecting bolt are connected with the buffer flanges.

[0016] Further, the normal-pressure discharge pipeline is in the shape of a square matched with the outlet of the fan, and the normal-pressure discharge pipeline is supported by a support assembly.

[0017] Further, the support assembly comprises a support column arranged on the bottom surface of a lower limiting plate, the lower limiting plate is connected with an upper limiting plate through connecting screw rods, and the normal-pressure discharge pipeline is arranged between the upper limiting plate and the lower limiting plate.

[0018] Further, the lengths of the upper limiting plate and the lower limiting plate are greater than that of the normal-pressure discharge pipeline, and the number of the connecting screw rods is two and they are arranged on the two sides of the normal-pressure discharge pipeline.

[0019] Further, a reinforcing rib plate is arranged between the support column and the lower limiting plate.

[0020] Further, the number of the connecting bolts is four, and the connecting bolts are uniformly distributed along the circumference of the bellows; and the two ends of each connecting bolt are detachably connected with connecting ears on the buffer flanges through nuts.

[0021] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0022] (1). The utility model discloses a set up steady pressure tank and low pressure discharge assembly and normal pressure discharge assembly and the control valve of setting between each component can effectively handle the tail gas emission problem under different pressure environment, avoids tail gas leakage and the problem of poor emission, ensures the stability of test environment;

[0023] (2). The utility model discloses a set up the combination of buffer assembly and steady pressure tank, makes tail gas treatment system can keep efficient operation under different pressure environment, under normal pressure through the fan auxiliary exhaust, under low pressure through vacuum pump cooperation work, ensures that tail gas is discharged smoothly, avoids the occurrence of gas backflow phenomenon, improves tail gas treatment level;

[0024] (3). The utility model discloses a set up the combination of low pressure discharge assembly and normal pressure discharge assembly and steady pressure tank, makes vehicle exhaust port pressure and cabin pressure environment same, thereby real simulation vehicle actual suction and exhaust working condition, ensures the stability of test environment, avoids because of the change of external pressure environment and influences the test environment of equipment interior, reduces the complexity and cost of equipment, satisfies the test demand under a variety of working conditions, reduces the deviation of test result, ensures the accuracy and reliability of test data. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0026] Figure 2 It is the main view structure schematic diagram of the utility model;

[0027] Figure 3 It is Figure 1 The local structure amplification schematic diagram of A place in;

[0028] Figure 4 It is Figure 1 The local structure amplification schematic diagram of B place.

[0029] 100, cabin connecting pipe, 101, fixed flange, 200, buffer assembly, 201, buffer flange, 202, connecting bolt, 203, bellows, 300, control valve, 400, steady pressure tank, 401, pump tank connecting pipe, 500, vacuum pump, 600, fan, 700, muffler, 800, normal pressure discharge pipeline, 801, upper limit plate, 802, connecting screw rod, 803, lower limit plate, 804, support column, 900, low pressure discharge pipeline. DETAILED DESCRIPTION

[0030] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] The drawings are only used for illustrative description, and cannot be understood as limitation of the patent;

[0032] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0033] The following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0034] In the description of the present application, it should be understood that the terms "first", "second", "third" and the like are only used to distinguish similar objects, and do not necessarily describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In addition, in the description of the present application, "multiple" means two or more, unless otherwise specified. The association between the associated objects is described, which means that there can be three kinds of relationships, for example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents a "or" relationship between the associated objects. The present application will be further described below in conjunction with the drawings and embodiments.

[0036] In order to solve the limitations of the prior art, the present embodiment provides a technical solution, which will be further described below in conjunction with the drawings and embodiments of the present application.

[0037] The utility model mainly is to the tail gas emission device for special environment test in prior art generally existing's unable to be applicable to a variety of pressure environment's tail gas emission operation, the technical problem such as the common emission not smooth, gas backflow and test accuracy difference, carries out technical improvement optimization. The specific optimization scheme is as follows:

[0038] Referring to the drawings Figure 1 And the drawings Figure 2 A tail gas emission device for special environment test, comprising: a pressure stabilizing tank 400, the pressure stabilizing tank 400 import connects cabin connecting pipe 100, and the outlet is communicated with low-pressure discharge assembly and normal-pressure discharge assembly respectively, the role of the pressure stabilizing tank 400 here is to maintain system pressure, adjust and maintain gas pressure stability, ensure the stability of the pressure in the test cabin, and further improve the accuracy of test results;Low-pressure discharge assembly, comprising low-pressure discharge pipeline 900 and vacuum pump 500, the vacuum pump 500 is adopted Roots pump, the vacuum pump 500 is communicated with low-pressure discharge pipeline 900 and pressure stabilizing tank 400, the vacuum pump 500 and pressure stabilizing tank 400 are communicated by pump tank connecting pipe 401, one end of pump tank connecting pipe 401 is communicated with the upper inlet of vacuum pump 500, one end is communicated with the upper inlet of pressure stabilizing tank 400, vacuum pump 500 and low-pressure discharge pipeline 900 are also connected in series with silencer 700, the main role of silencer 700 here is to filter the gas of tail gas emission and reduce the noise generated by airflow, maintain a good working environment. Normal-pressure discharge assembly, comprising normal-pressure discharge pipeline 800 and fan 600, fan 600 is connected with normal-pressure discharge pipeline 800 and pressure stabilizing tank 400;Pressure stabilizing tank 400 and cabin connecting pipe 100, pressure stabilizing tank 400 and fan 600, pressure stabilizing tank 400 and vacuum pump 500 are connected in series with control valve 300, control valve 300 adopts butterfly valve, the butterfly valve can realize the flow regulation and cut-off of gas under low pressure, the on-off of control valve 300 here is controlled by the controller of system, and the control principle is that when tail gas needs to be discharged, the control valve 300 between pressure stabilizing tank 400 and cabin connecting pipe 100 is opened, if tail gas is normal pressure, the control valve 300 between fan 600 and pressure stabilizing tank 400 is opened, if tail gas is low pressure, the control valve 300 between vacuum pump 500 and pressure stabilizing tank 400 is opened.

[0039] Referring to the drawings Figure 3The buffer assembly 200 is arranged in series on the cabin connecting pipe 100 and the pump tank connecting pipe 401 between the pressure stabilizing tank 400 and the vacuum pump 500, and the buffer assembly 200 is used for buffering the noise and amplitude caused by the vibration of the power equipment. Specifically, the buffer assembly 200 comprises a corrugated pipe 203, both ends of the corrugated pipe 203 are connected with buffer flanges 201, fixed flanges 101 are arranged on the cabin connecting pipe 100 or the pump tank connecting pipe 401, the buffer flanges 201 at both ends of the corrugated pipe 203 are detachably connected with the fixed flanges 101 through screw assemblies, and a plurality of connecting bolts 202 are arranged between the fixed flanges 101 at both ends of the corrugated pipe 203, both ends of the connecting bolts 202 are connected with the buffer flanges 201, the connecting bolts 202 are used for fixing both ends of the corrugated pipe 203, the buffer assembly 200 is used for buffering the noise of system vibration, and the error existing in pipeline installation can be flexibly adjusted, so that the assembly is facilitated. The number of the connecting bolts 202 is four, and the connecting bolts 202 are uniformly distributed along the circumference of the corrugated pipe 203, and both ends of the connecting bolts 202 are detachably connected with the connecting ears on the buffer flanges 201 through nuts.

[0040] Referring to the drawings Figure 4 The shape of the normal pressure exhaust pipe 800 is a square matched with the outlet of the fan 600, and the normal pressure exhaust pipe 800 is supported through a support assembly. The support assembly comprises a support column 804 arranged on the bottom surface of a lower limiting plate 803, both ends of the lower limiting plate 803 are connected with an upper limiting plate 801 through connecting screw rods 802, and the normal pressure exhaust pipe 800 is arranged between the parallel and horizontal upper limiting plate 801 and the lower limiting plate 803. The length of the upper limiting plate 801 and the lower limiting plate 803 is greater than that of the normal pressure exhaust pipe 800, and the number of the connecting screw rods 802 is two and is arranged on both sides of the normal pressure exhaust pipe 800. A reinforcing rib plate is arranged between the support column 804 and the lower limiting plate 803.

[0041] In use, first, whether the tail gas is normal pressure tail gas or low pressure tail gas is judged according to the pressure in the cabin, if the tail gas is normal pressure tail gas, the fan 600 is started, the butterfly valve between the pressure stabilizing tank 400 and the fan 600 is opened, and the normal pressure tail gas is discharged, at this time, the butterfly valve between the pressure stabilizing tank 400 and the vacuum pump 500 is in a closed state, if the tail gas is low pressure tail gas, the vacuum pump 500 is started, the butterfly valve between the pressure stabilizing tank 400 and the fan 600 is closed, the butterfly valve between the pressure stabilizing tank 400 and the vacuum pump 500 is opened, and the low pressure tail gas is discharged.

[0042] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0043] The above description is merely the preferred embodiments of the present application and is not intended in any way to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An exhaust emission device for special environmental testing, characterized by, The utility model relates to a kind of exhaust system of cabin, including: Pressure tank (400), which is connected to the cabin connecting pipe (100) at the inlet, and is connected to the low-pressure exhaust assembly and the normal-pressure exhaust assembly respectively at the outlet; The low-pressure exhaust assembly includes a low-pressure exhaust pipe (900) and a vacuum pump (500) connected to the low-pressure exhaust pipe (900) and the pressure tank (400); The normal-pressure exhaust assembly includes a normal-pressure exhaust pipe (800) and a fan (600) connected to the normal-pressure exhaust pipe (800) and the pressure tank (400); A control valve (300) is connected in series between the pressure tank (400) and the cabin connecting pipe (100), between the pressure tank (400) and the fan (600), and between the pressure tank (400) and the vacuum pump (500).

2. The exhaust emission device for special environment test according to claim 1, characterized in that, A buffer assembly (200) is connected in series between the cabin connecting pipe (100) and the vacuum pump (500) and between the pump-tank connecting pipe (401) and the pressure tank (400), and the buffer assembly (200) is used to buffer the noise and amplitude caused by the vibration of the power equipment.

3. The exhaust emission device for special environment test according to claim 2, characterized in that, The buffer assembly (200) includes a bellows (203) connected to buffer flanges (201) at both ends, and a fixed flange (101) is installed on the cabin connecting pipe (100) or the pump-tank connecting pipe (401); the buffer flanges (201) at both ends of the bellows (203) are respectively installed with the fixed flanges (101), and a plurality of connecting bolts (202) are installed between the fixed flanges (101) at both ends of the bellows (203), and the connecting bolts (202) are respectively connected to the buffer flanges (201) at both ends.

4. The exhaust emission device for special environment test according to any one of claims 1-3, characterized in that, The normal-pressure exhaust pipe (800) is in the shape of a square matching the outlet of the fan (600), and the normal-pressure exhaust pipe (800) is supported by a support assembly.

5. An exhaust system for special environmental testing according to claim 4, wherein, The support assembly includes a support column (804) installed on the bottom surface of a lower limiting plate (803), and the lower limiting plate (803) is connected to an upper limiting plate (801) by a connecting screw rod (802); the normal-pressure exhaust pipe (800) is installed between the upper limiting plate (801) and the lower limiting plate (803).

6. An exhaust system for special environmental testing according to claim 5, wherein, The lengths of the upper limiting plate (801) and the lower limiting plate (803) are greater than that of the normal-pressure exhaust pipe (800), and the number of the connecting screw rods (802) is two and located on both sides of the normal-pressure exhaust pipe (800).

7. An exhaust system for special environmental testing according to claim 6, wherein, A silencer (700) is connected in series between the vacuum pump (500) and the low-pressure exhaust pipe (900).

8. The exhaust emission device for special environment test according to claim 5, wherein, A reinforcing rib plate is arranged between the support column (804) and the lower limiting plate (803).

9. The exhaust emission device for special environment test according to claim 3, wherein, The number of the connecting bolts (202) is four, and they are evenly distributed along the circumference of the bellows (203); the connecting bolts (202) are respectively detachably connected to the connecting ears on the buffer flanges (201) by nuts at both ends.

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