Pressure balance exhaust structure

Abstract

The utility model relates to the technical field of engine testing, in particular to a pressure balance exhaust structure which comprises a main pipeline and a plurality of branch pipelines, and one end of each branch pipeline is used for being connected with an exhaust pipe of an engine. One end of the main pipeline is used for being connected with a fan; the system further comprises connecting pipelines, pressure sensors and electronic adjusting valves, the connecting pipelines are arranged between every two adjacent branch pipelines, and the multiple branch pipelines are connected in series one by one through the connecting pipelines; the pressure sensors are arranged on the branch pipelines respectively and used for detecting the exhaust pressure of the engine. The multiple branch pipelines are connected in series in a one-to-one mode, the pressure sensors are arranged on the branch pipelines, the pressure conditions of the branch pipelines are collected in real time, the valves are adjusted in real time by detecting the pressure conditions of the branch pipelines, and the pressure of the branch pipelines is adjusted in real time. Therefore, the pressure of each branch pipeline is balanced, and the exhaust smoothness is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine testing, in particular to a pressure-balanced exhaust structure. Background Art

[0002] Engine testing usually refers to performance testing and functional testing of the engine to ensure that it works properly under normal operating conditions. When testing the engine performance, the exhaust gas needs to be discharged through the exhaust system to ensure the cleanliness and safety of the test environment, such as the LNG engine test system disclosed in CN204831791U. This process usually includes the use of specially designed exhaust equipment, such as exhaust pipes and fans, to discharge the exhaust gas outdoors or process it through a filtration system.

[0003] The conventional layout of the exhaust system is to arrange a main pipeline and several branch pipelines. The several branch pipelines are respectively connected to the exhaust pipe of an engine. A fan is installed at one end of the main pipeline. When the fan is working, it sucks the exhaust gas generated by the engine.

[0004] When multiple exhaust systems are in use, the closer the engine is to the fan, the greater the air intake of the engine by the fan, and the farther the engine is from the fan, the smaller the air intake of the engine by the fan. The main line pressure is generally constant. Multiple exhaust units cause system pressure fluctuations due to changes in the distance and exhaust flow of the engine, resulting in overall poor exhaust. Utility Model Content

[0005] In view of this, the utility model proposes a pressure-balanced exhaust structure, which connects multiple branch pipelines in series one by one and sets a pressure sensor on each branch pipeline to collect the pressure conditions of each branch pipeline in real time, and balances the pressure of each branch pipeline by detecting the pressure condition of each branch pipeline and adjusting the valve in real time to improve the smoothness of exhaust.

[0006] The technical solution of the utility model is achieved in this way:

[0007] The utility model provides a pressure-balanced exhaust structure, comprising a main pipeline and a plurality of branch pipelines, wherein:

[0008] A plurality of branch pipes are connected in parallel to the main pipe, and one end of each branch pipe is used to connect to the exhaust pipe of the engine;

[0009] One end of the main pipe is used to connect to the fan;

[0010] It also includes connecting pipes, pressure sensors and electronic regulating valves, among which,

[0011] The connecting pipeline is provided at one location between two adjacent branch pipelines, and a plurality of branch pipelines are connected in series one by one through the connecting pipeline;

[0012] The pressure sensor is provided on each branch pipe, and is used to detect the exhaust pressure of the engine;

[0013] The electronic regulating valve is respectively arranged on each of the connecting pipelines.

[0014] On the basis of the above technical solution, preferably, a through hole is provided through the side of the branch pipeline in a radial direction, wherein:

[0015] The branch pipeline and the connecting pipeline are communicated with each other through the through hole.

[0016] On the basis of the above technical solution, preferably, the connecting pipeline includes a connecting pipe, a hose and a clamp, wherein:

[0017] One hose is fixed at each end of the connecting pipe, and the connecting pipe and the hose are in communication;

[0018] A clamp is fixedly provided at one end of the hose away from the connecting pipe, and the clamp is fixed on the side of the branch pipeline;

[0019] One end of the hose away from the connecting pipe passes through the side of the clamp, and one end of the hose away from the connecting pipe is made of rubber and abuts against the side of the branch pipe;

[0020] The hose is communicated with the through hole.

[0021] On the basis of the above technical solution, preferably, the connecting pipe and the hose are connected by flange fixing.

[0022] On the basis of the above technical solution, preferably, the connecting pipeline further includes a rubber pad, wherein the rubber pad is clamped between the clamp and the branch pipeline.

[0023] On the basis of the above technical solution, preferably, the rubber pad is provided with an avoidance hole, wherein:

[0024] The outer diameter of the hose is smaller than the inner diameter of the avoidance hole.

[0025] On the basis of the above technical solution, preferably, the inner surface of the clamp is evenly distributed with anti-slip thorns.

[0026] On the basis of the above technical solution, preferably, the hose is a metal bellows.

[0027] On the basis of the above technical solution, preferably, the hose is a rubber hose.

[0028] On the basis of the above technical solution, preferably, the connecting pipeline is a steel pipe, and both ends of the connecting pipeline are welded and fixed on the branch pipeline.

[0029] The pressure balance exhaust structure of the utility model has the following beneficial effects compared with the prior art:

[0030] (1) By connecting multiple branch pipes in series one by one and setting a pressure sensor on each branch pipe, the pressure conditions of each branch pipe can be collected in real time. By detecting the pressure conditions of each branch pipe and adjusting the electronic control valve in real time, the pressure of each branch pipe can be balanced to improve the smoothness of exhaust.

[0031] (2) By providing a hose, it is convenient to adjust the installation angle of the connecting pipeline, thereby facilitating the layout of the connecting pipeline.

[0032] (3) By providing a clamp and a through hole, the installation of the connecting pipe is convenient, and it is also convenient to modify the existing pipeline. (4) By providing that the end of the hose away from the connecting pipe is made of rubber material and has an arc shape, and the end of the hose away from the connecting pipe passes through the side of the clamp and abuts against the side of the branch pipe, it is beneficial to improve the sealing effect after the connecting pipe and the branch pipe are connected, and it is not easy to leak.

[0033] (5) The provision of rubber pads or anti-skid ridges can help improve the anti-skid effect of the clamp and improve the stability of the clamp after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a schematic diagram of the planar structure of a pressure-balanced exhaust structure of the utility model;

[0036] Figure 2 It is a schematic diagram of the connection structure of the branch pipeline and the connecting pipeline of the utility model;

[0037] Figure 3 It is a partial exploded diagram of a pressure-balanced exhaust structure of the utility model;

[0038] Figure 4 It is a structural schematic diagram of the anti-slip convex thorn of the utility model;

[0039] Figure 5 This is a schematic diagram of the installation structure of the rubber pad of the utility model;

[0040] Figure 6 It is a side view of the rubber pad of the utility model;

[0041] In the figure: 1, main pipeline; 2, branch pipeline; 3, connecting pipeline; 4, pressure sensor; 5, electronic control valve; 6, engine; 7, fan; 31, connecting pipe; 32, hose; 33, clamp; 34, rubber pad; 201, through hole; 3301, anti-slip thorn; 3401, avoidance hole. DETAILED DESCRIPTION

[0042] The following will be combined with the specific implementation of the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] like Figure 1-6 As shown, a pressure-balanced exhaust structure of the utility model includes a main pipeline 1, a plurality of branch pipelines 2, a connecting pipeline 3, a pressure sensor 4 and an electronic regulating valve 5, wherein:

[0044] The main pipeline 1 and the branch pipeline 2 are made of galvanized steel pipes. Several branch pipelines 2 are connected in parallel to the main pipeline 1. One end of the branch pipeline 2 is used to connect to the exhaust pipe of the engine 6, and one end of the main pipeline 1 is used to connect to the fan 7. Several branch pipelines 2 form several exhaust systems. When testing the engine 6, each exhaust system corresponds to one engine 6. During the test, the exhaust pipe of the engine 6 is exhausted, and the fan 7 is powered on to work, and the exhaust gas discharged by the engine 6 is sucked through the main pipeline 1 and the branch pipeline 2.

[0045] During the use of multiple exhaust systems, the closer the engine 6 is to the fan 7, the greater the air intake of the fan 7 to the engine 6, and the farther the engine 6 is from the fan 7, the smaller the air intake of the fan 7 to the engine 6. The pressure of the main pipeline 1 is generally constant. The multiple exhaust units cause the system pressure to fluctuate due to the distance and the change of the exhaust flow rate of the engine 6, and the overall exhaust will be poor. To solve this problem, a connecting pipeline 3 is set between two adjacent branch pipelines 2, and several branch pipelines 2 are connected in series one by one through the connecting pipeline 3. A pressure sensor 4 is set on each branch pipeline 2. The pressure sensor 4 is set at one end of the branch pipeline 2 close to the engine 6 to detect the exhaust pressure. The exhaust pressure of the engine 6, that is, the internal pressure of the branch pipe 2 close to one end of the engine 6, is provided with an electronic regulating valve 5 on each connecting pipe 3, and the electronic regulating valve 5 and the pressure sensor 4 are connected by a cable. During the test, the pressure sensor 4 is used to collect the pressure conditions of each branch pipe 2 in real time, and the pressure conditions of each branch pipe 2 are detected and the electronic regulating valve 5 is adjusted in real time to balance the pressure of each branch pipe 2 and improve the smoothness of exhaust. Among them, the flow rate of the electronic regulating valve is controlled by the pressure sensor, which is any one of the existing technologies, such as the electronic pressure regulating valve. At the same time, the system pressure balance control accuracy can be improved, and the exhaust volume of each system can be accurately controlled.

[0046] When the air duct is arranged on site, the arrangement direction of each branch pipeline 2 is different. Therefore, in order to facilitate the arrangement of the connecting pipeline 3, a bendable structure is provided on the connecting pipeline 3. Specifically, a through hole 201 is provided through the side of the branch pipeline 2 in a radial direction, wherein the branch pipeline 2 and the connecting pipeline 3 are connected through the through hole 201. The connecting pipeline 3 includes a connecting pipe 31, a hose 32 and a clamp 33, wherein a hose 32 is fixed at each end of the connecting pipe 31, the connecting pipe 31 and the hose 32 are connected, and the hose 32 is away from the connecting pipe 31. A clamp 33 is fixedly provided at one end, and the clamp 33 is fixed to the side of the branch pipeline 2. The end of the hose 32 away from the connecting pipe 31 is made of rubber and has an arc shape, and the end of the hose 32 away from the connecting pipe 31 passes through the side of the clamp 33. After the clamp 33 is installed, the end of the hose 32 away from the connecting pipe 31 is abutted against the side of the branch pipeline 2, and the hose 32 is connected to the through hole 201. Since the hose 32 has the ability to be bent, it is convenient to adjust the installation angle of the connecting pipeline 3, thereby facilitating the arrangement of the connecting pipeline 3.

[0047] In the above structure, the connecting pipe 31 and the hose 32 are connected by flange fixing. The hose 32 is a metal bellows or a rubber hose. Since the end of the hose 32 away from the connecting pipe 31 is made of rubber and has an arc shape, and is used to support the side of the branch pipe 2, it is beneficial to improve the sealing effect after the connecting pipe 3 and the branch pipe 2 are connected, and it is not easy to leak.

[0048] In order to improve the installation firmness of the clamp 33, the connecting pipeline 3 also includes a rubber pad 34, wherein the rubber pad 34 is clamped and fixed between the clamp 33 and the branch pipeline 2, and an avoidance hole 3401 is provided on the rubber pad 34, wherein the outer diameter of the hose 32 is smaller than the inner diameter of the avoidance hole 3401. After the clamp 33 is installed, the hose 32 passes through the avoidance hole 3401 and is clamped and fixed between the clamp 33 and the branch pipeline 2 by the rubber pad 34. The friction of the rubber pad 34 can effectively improve the anti-slip effect of the clamp 33 and improve the stability of the clamp 33 after installation.

[0049] In addition, if Figure 4 As shown, pointed anti-skid thorns 3301 can also be provided to replace the rubber pad 34. Specifically, the anti-skid thorns 3301 are provided on the inner surface of the clamp 33, and a number of them are evenly distributed. After the clamp 33 is installed, the anti-skid thorns 3301 are pressed against the surface of the branch pipe 2 to achieve an anti-skid effect.

[0050] When arranging the air duct, when two adjacent branch pipelines 2 are close and in the same direction, the connecting pipeline 3 is a steel pipe, and both ends of the connecting pipeline 3 are directly welded and fixed to the branch pipeline 2.

[0051] See also Figure 1 The use principle of a pressure-balanced exhaust structure of the utility model is as follows:

[0052] S1. Assume that the target pressure required by each system is -0.5Kpa;

[0053] S2, that is, the pressure requirements of P1-P6 are all -0.5Kpa;

[0054] S3, if 1# is not started or the exhaust flow is small, the pressure of P1 will be large, then you can open the valve between 1# and 2# to mix the flow of 1# system into 2# system, reduce the pressure of 1# test bench, and increase the negative pressure of 2# test bench. Test bench refers to the engine test bench;

[0055] S4, control 3-6# systems in the same way.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure-balanced exhaust structure, comprising a main pipeline (1) and a plurality of branch pipelines (2), wherein: A plurality of branch pipes (2) are connected in parallel to the main pipe (1), and one end of the branch pipe (2) is used to connect to the exhaust pipe of the engine (6); One end of the main pipe (1) is used to connect to a fan (7); It is characterized in that it also includes a connecting pipeline (3), a pressure sensor (4) and an electronic regulating valve (5), wherein: The connecting pipeline (3) is provided at one location between two adjacent branch pipelines (2), and a plurality of branch pipelines (2) are connected in series one by one through the connecting pipeline (3); The pressure sensor (4) is provided on each branch pipe (2) and is used to detect the exhaust pressure of the engine (6); One electronic regulating valve (5) is provided on each of the connecting pipelines (3).

2. A pressure-balanced exhaust structure according to claim 1, characterized in that: A through hole (201) is provided in the radial direction through the side of the branch pipeline (2), wherein: The branch pipeline (2) and the connecting pipeline (3) are in communication with each other via the through hole (201).

3. A pressure-balanced exhaust structure according to claim 2, characterized in that: The connecting pipeline (3) comprises a connecting pipe (31), a hose (32) and a clamp (33), wherein: A hose (32) is fixed to each end of the connecting pipe (31), and the connecting pipe (31) and the hose (32) are in communication; A clamp (33) is fixedly provided at one end of the hose (32) away from the connecting pipe (31), and the clamp (33) is fixed on the side of the branch pipeline (2); One end of the hose (32) away from the connecting pipe (31) passes through the side of the clamp (33); the end of the hose (32) away from the connecting pipe (31) is made of rubber and abuts against the side of the branch pipe (2); The hose (32) is in communication with the through hole (201).

4. A pressure-balanced exhaust structure according to claim 3, characterized in that: The connecting pipe (31) and the hose (32) are connected by means of flange fixing.

5. A pressure-balanced exhaust structure according to claim 4, characterized in that: The connecting pipeline (3) further comprises a rubber pad (34), wherein the rubber pad (34) is clamped between the clamp (33) and the branch pipeline (2).

6. A pressure-balanced exhaust structure according to claim 5, characterized in that: The rubber pad (34) is provided with an avoidance hole (3401), wherein: The outer diameter of the hose (32) is smaller than the inner diameter of the avoidance hole (3401).

7. A pressure-balanced exhaust structure according to claim 3, characterized in that: The inner surface of the clamp (33) is uniformly provided with anti-skid thorns (3301).

8. A pressure-balanced exhaust structure according to claim 3, characterized in that: The hose (32) is a metal bellows.

9. A pressure-balanced exhaust structure according to claim 3, characterized in that: The hose (32) is a rubber hose.

10. A pressure-balanced exhaust structure according to claim 2, characterized in that: The connecting pipeline (3) is a steel pipe, and both ends of the connecting pipeline (3) are welded and fixed on the branch pipeline (2).

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