阅读说明：本技术 泄压阀检测方法、系统及发动机 (Decompression valve detection method and system and engine ) 是由 张松 李启鹏 李铁东 李超 陈桐 于 2021-06-17 设计创作，主要内容包括：本申请公开一种泄压阀检测方法、系统及发动机,涉及阀门检测的技术领域,本申请技术方案中,可通过获取泄压阀开始开启的第一时刻和压力传感器测得的压力值达到最大值的第二时刻,并将第一时刻与第二时刻的第一时间差与第一预设时间对比,以判断该泄压阀的性能是否符合要求。通过这样的方式检测泄压阀的性能的准确性更高,同时通过判断第一时间差与预设时间的大小关系来检测泄压阀的性能,可不必再单独检测第一管路是否发生喘振,相应的,也可不必再设置用于检测第一管路是否发生喘振的检测装置,从而使得本申请中的泄压阀检测方法的准确性和检测效率高。(The application discloses relief valve detection method, system and engine relates to the technical field of valve detection, and in the technical scheme of the application, the accessible obtains the first moment that the relief valve begins to open and the second moment that the pressure value that pressure sensor measured reaches the maximum value to compare the first time difference and the first preset time of first moment and second moment, with the performance of judging this relief valve and whether accord with the requirement. The accuracy of detecting the performance of the pressure release valve through the mode is higher, the performance of the pressure release valve is detected through judging the size relation between the first time difference and the preset time, whether surge occurs to the first pipeline can be detected without independently detecting, correspondingly, a detection device for detecting whether surge occurs to the first pipeline can be set without detecting, and therefore the accuracy and the detection efficiency of the pressure release valve detection method are high.)

1. A method for detecting a pressure relief valve, wherein the pressure relief valve (100) is arranged on a second pipeline (400), the second pipeline (400) is connected to a first pipeline (300), the first pipeline (300) is provided with a first end and a second end, the first end is connected with a gas pressurizing device (500), the second end can be opened and closed, the second pipeline (400) is connected between the first end and the second end, and the method for detecting the pressure relief valve comprises the following steps:

acquiring a first moment when a pressure relief valve (100) starts to be opened;

acquiring a second moment when the gas pressure of the gas passing through the pressure relief valve (100) reaches a maximum value after the first moment;

obtaining a first time difference between the first time and the second time,

and comparing the first time difference with a first preset time to obtain a comparison result, and determining whether the pressure release valve (100) is in a qualified state or not according to the comparison result.

2. The pressure relief valve detection method according to claim 1, wherein if the comparison result indicates that the first time difference is smaller than the first preset time, the pressure relief valve (100) is in a pass state, and if the comparison result indicates that the first time difference is larger than the first preset time, the pressure relief valve (100) is in a fail state.

3. The pressure relief valve detection method according to claim 2, characterized in that the pressure relief valve (100) is in a half-closed state when the first time difference is greater than the first preset time and less than a second preset time,

and when the first time difference is larger than the second preset time, the pressure relief valve (100) is in a non-qualified state.

4. The pressure relief valve detection method according to claim 3, characterized in that, in the case where the pressure relief valve (100) is in a half-closed state, it is acquired whether surge occurs in the first line (300),

-the pressure relief valve (100) being in a non-conforming state in case of surge in the first line (300),

the pressure relief valve (100) is in an acceptable state when the first pipeline (300) is not surging.

5. The pressure relief valve detection method according to claim 4, characterized in that the first pipeline (300) is further provided with an outlet valve port (310), and a third time at which the outlet valve port (310) starts to close is obtained before a first time at which the pressure relief valve (100) starts to open, wherein the third time and the first time have a second time difference, and the second time difference is smaller than a third preset time.

6. The pressure relief valve detection method according to claim 5, characterized in that the first preset time is 80ms, the second preset time is 120ms, and the third preset time is 20 ms.

7. A pressure relief valve detecting system, pressure relief valve (100) set up in second pipeline (400), second pipeline (400) are connected in first pipeline (300), first pipeline (300) have first end and second end, first end is connected with gaseous pressure device (500), but the second end switching, second pipeline (400) connect in first end with between the second end, its characterized in that, pressure relief valve detecting system includes: a pressure sensor (200) and a control device,

wherein the pressure sensor (200) is arranged at the second line (400),

the control device is in communication connection with the pressure relief valve (100) to obtain a first time when the pressure relief valve (100) starts to open, and is also in communication connection with the pressure sensor (200) to obtain a second time when the gas pressure of the gas passing through the pressure relief valve (100) reaches a maximum value.

8. A pressure relief valve detection system according to claim 7 characterized in that the first line (300) is provided with an outlet port (310), the control means being further adapted to obtain a third moment at which the outlet port (310) starts to close.

9. The pressure relief valve detection system of claim 7 further comprising a surge detection device that can detect whether surge occurs in the first pipeline (300).

10. An engine comprising a pressure relief valve detection system as claimed in any one of claims 7 to 9.

Technical Field

The application belongs to the technical field of valve detection, and particularly relates to a method and a system for detecting a pressure release valve and an engine.

Background

The pressure relief valve is a valve arranged on an air inlet pipe of the engine, high-pressure gas in the air inlet pipe can be discharged through the pressure relief valve, and the air pressure in the air inlet pipe can be reduced to prevent the surge of the engine. Therefore, the opening speed of the pressure relief valve can influence the discharge speed of high-pressure gas in the air inlet pipe, and the higher the opening speed of the pressure relief valve is, the higher the discharge speed of the gas in the air inlet pipe is, and the lower the possibility of surging of the engine is.

In the related art, in order to detect the performance of the pressure relief valve, the response time of the complete opening of the pressure relief valve is used as an index for evaluating the performance of the pressure relief valve, and then in an actual working condition, the opening of the pressure relief valve is influenced by the resistance of high-pressure gas, so that the actual opening response time of the pressure relief valve is different from the theoretical opening corresponding time. This can lead to inaccurate pressure relief valve performance measurements.

Disclosure of Invention

The embodiment of the application aims to provide a method and a system for detecting a pressure relief valve and an engine, and the problem that the detection result of the existing pressure relief valve performance detection mode is inaccurate can be solved.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, the application discloses a method for detecting a pressure relief valve, where the pressure relief valve is disposed on a second pipeline, the second pipeline is connected to a first pipeline, the first pipeline has a first end and a second end, the first end is connected to a gas pressurizing device, the second end is openable and closable, the second pipeline is connected between the first end and the second end, and the method for detecting a pressure relief valve includes:

acquiring a first moment when the pressure relief valve starts to open;

acquiring a second moment when the gas pressure passing through the pressure relief valve reaches a maximum value after the first moment;

obtaining a first time difference between the first time and the second time,

and comparing the first time difference with a first preset time to obtain a comparison result, and determining whether the pressure release valve is in a qualified state or not according to the comparison result.

In a second aspect, the present application further provides a relief valve detection system, the relief valve sets up in the second pipeline, the second tube coupling is in first pipeline, first pipeline has first end and second end, first end is connected with gaseous pressure device, but the second end switching, the second tube coupling in first end with between the second end, relief valve detection system includes: a pressure sensor and a control device, wherein the pressure sensor is connected with the control device,

wherein the pressure sensor is disposed at the second pipeline,

the control device is in communication connection with the pressure release valve to obtain a first moment when the pressure release valve starts to open, and is also in communication connection with the pressure sensor to obtain a second moment when the air pressure of the gas in the second pipeline reaches a maximum value.

In a third aspect, the present application further provides an engine including the pressure relief valve detection system described above.

Compared with the prior art, in the pressure relief valve detection method disclosed in the embodiment of the application, the first time when the pressure relief valve starts to open and the second time when the air pressure in the second pipeline reaches the maximum value are obtained, and the first time difference between the first time and the second time is compared with the preset time, so that the accuracy of detecting the performance of the pressure relief valve is higher, meanwhile, the performance of the pressure relief valve is detected by judging the size relation between the first time difference and the preset time, whether the first pipeline surges or not can be detected independently, correspondingly, a detection device for detecting whether the first pipeline surges or not can be set, and therefore the accuracy and the detection efficiency of the pressure relief valve detection method are higher.

Drawings

Fig. 1 is a flowchart of a pressure relief valve detection method disclosed in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a pressure relief valve detection system disclosed in an embodiment of the present application.

Description of reference numerals:

100-a pressure relief valve,

200-a pressure sensor-the pressure of the gas,

300-first line, 310-outlet valve port,

400-the second line-up of the second line,

500-gas pressurization means.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The technical solutions disclosed in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Referring to fig. 1, an embodiment of the present application discloses a method for detecting a pressure relief valve, which is used to detect whether surge occurs in a device to which the pressure relief valve 100 is applied. The pressure relief valve 100 is disposed in the second pipeline 400, and the second pipeline 400 is connected to the first pipeline 300. Specifically, the first pipeline 300 has a first end and a second end, the first end of the first pipeline 300 is connected to the gas pressurizing device 500, the second end of the first pipeline 300 can be opened and closed, the gas pressurizing device 500 can pressurize the gas to form high-pressure gas, the high-pressure gas is introduced into the first pipeline 300, and the high-pressure gas in the first pipeline 300 can be discharged from the second end of the first pipeline 300. After the first pipeline 300 is closed, the gas pressure of the gas in the first pipeline 300 is continuously increased by the inertia effect of the gas pressurizing device 500, so that the relief valve 100 needs to be opened, the first pipeline 300 and the second pipeline 400 form a passage, and the high-pressure gas in the first pipeline 300 can be discharged through the second pipeline 400, so that the gas pressure in the first pipeline 300 is reduced, and the first pipeline 300 is prevented from surging.

However, the time required for the relief valve 100 to open completely from the beginning of opening may be too long, which may result in the time for the gas in the first pipeline 300 to be in the high pressure state to be prolonged, and further may result in the first pipeline 300 surging.

The detection method described above comprises the steps of:

in step 101, a first timing at which the relief valve 100 starts to open is obtained. After the end of the first pipeline 300 away from the gas pressurizing device 500 is closed, since the gas pressurizing device 500 cannot immediately stop pressurizing, the gas pressure in the first pipeline 300 increases, the pressure relief valve 100 starts to open, so that the gas in the first pipeline 300 can be discharged into the second pipeline 400, and at the first moment when the pressure relief valve 100 starts to open, the gas in the first pipeline 300 starts to be discharged into the second pipeline 400.

In step 102, a second time point is obtained at which the gas pressure in the second pipeline 400 reaches a maximum value after the first time point. When the relief valve 100 starts to open, the gas in the first pipeline 300 starts to be discharged from the relief valve 100 into the second pipeline 400, and as the valve port of the relief valve 100 continues to expand, the flow rate of the gas discharged from the first pipeline 300 into the second pipeline 400 per unit time also continues to increase. When the valve port of the pressure relief valve 100 is expanded to the maximum under the working environment, correspondingly, the flow rate of the gas discharged from the first pipeline 300 to the second pipeline 400 in unit time is the maximum, and the gas pressure in the second pipeline 400 is also the maximum, that is, the maximum opening degree of the valve port of the pressure relief valve 100 under the working environment is reached. The second time is therefore the time at which the valve port of the relief valve 100 can reach the maximum opening degree in the operating environment.

In step 103, a first time difference is obtained between the first time and the second time. The first time difference is a time length from the beginning of opening the valve port of the pressure relief valve 100 to the maximum opening of the valve port of the pressure relief valve 100 in the working environment, the first time difference is compared with a first preset time to obtain a comparison result, and whether the pressure relief valve 100 is in a qualified state is determined according to the comparison result.

In the pressure relief valve detection method disclosed in the embodiment of the application, the pressure relief valve 100 to be detected is applied to the actual working condition, the first time when the pressure relief valve 100 starts to open and the second time when the air pressure in the second pipeline 400 reaches the maximum value are measured, the first time difference between the first time and the second time is compared with the preset time, the accuracy of detecting the performance of the pressure relief valve 100 in such a way is higher, meanwhile, the performance of the pressure relief valve 100 is detected by judging the size relation between the first time difference and the preset time, it is not necessary to separately detect whether the first pipeline 300 surges, correspondingly, it is also not necessary to set a detection device for detecting whether the first pipeline 300 surges, and therefore the accuracy of the pressure relief valve 100 detection method in the application is higher, and the detection efficiency is high.

Specifically, if the comparison result is that the first time difference is smaller than the first preset time, the pressure release valve 100 is in a qualified state, and if the comparison result is that the first time difference is larger than the first preset time, the pressure release valve 100 is in an unqualified state.

During the actual detection process, the first time difference is larger than the preset time when the partial pressure relief valve 100 is detected, but the first pipeline 300 does not surge. In order to make the detection result of the pressure relief valve 100 more accurate, optionally, in the pressure relief valve detection method disclosed in the embodiment of the present application, a second preset time is further set, and the second preset time is greater than the first preset time.

Specifically, in the case where the first time difference is less than the first preset time, the first pipeline 300 does not generate surge, and therefore the pressure relief valve 100 of this type is determined to be in an acceptable state.

In the case where the first time difference is greater than the first preset time and less than the second preset time, the first pipeline 300 may or may not surge, and thus this type of pressure relief valve 100 is considered to be in a semi-acceptable state. For this type of pressure relief valve 100, a subsequent detection method is required to detect a specific state of the pressure relief valve 100.

In the case where the first time difference is greater than the second preset time, the first pipeline 300 may surge, and thus the pressure relief valve 100 of this type is determined to be in a failure state.

Specifically, the first preset time is 80ms, and the second preset time is 120 ms. In order to obtain the first preset time and the second preset time, the plurality of the air release valves 100 may be detected by the above-mentioned method, and the first time difference of the plurality of the air release valves 100 may be obtained, and it may be synchronously detected whether the first pipeline 300 has surge while the first time difference of the air release valves 100 is detected. The first preset time and the second preset time can be obtained through a large number of detections, that is, the first time difference of the air-release valve 100 where the first pipeline 300 surge does not occur is less than 80ms among the plurality of air-release valves 100, and the first time difference of the air-release valve 100 where the first pipeline 300 surge occurs is more than 120ms among the plurality of air-release valves 100.

In actual detection, the first time difference obtained by detecting most of the pressure relief valves 100 is smaller than a first preset time or larger than a second preset time. The first time difference obtained by detecting the small number of pressure relief valves 100 is greater than the first preset time and less than the second preset time, and for the small number of pressure relief valves 100, further detection is required to determine the state of the pressure relief valve 100.

Therefore, in order to determine the specific state of the pressure relief valve 100 in the semi-qualified state, optionally, the method for detecting the pressure relief valve 100 disclosed in the embodiment of the present application further includes:

in step 104, when the relief valve 100 is in the semi-acceptable state, it is determined whether or not the first pipeline 300 is in surge, and if the first pipeline 300 is in surge, the relief valve 100 is in the unacceptable state, and if the first pipeline 300 is not in surge, the relief valve 100 is in the acceptable state.

Specifically, when the pressure relief valve 100 is detected, if the pressure relief valve 100 is in a half-closed state, the pressure relief valve 100 may be measured again, and whether the first pipeline 300 has surging or not may be detected at the same time. If the first pipeline 300 has surged, the relief valve 100 is in a non-conforming state, and if the first pipeline 300 has not surged, the relief valve 100 is in a conforming state. In this way, the influence on the detection efficiency of the relief valve 100 is small while ensuring the detection accuracy of the relief valve 100.

In order to open and close the side of first pipeline 300 away from gas pressurizing device 500, valve outlet 310 may be disposed on the side of first pipeline 300 away from gas pressurizing device 500, and valve outlet 310 may be opened or closed.

Optionally, the method for detecting the pressure relief valve 100 disclosed in the embodiment of the present application further includes:

before step 101, a third time when outlet port 310 starts to close is obtained, after outlet port 310 starts to close, the gas pressure in first pipeline 300 starts to increase continuously, the first time and the third time have a second time difference, and the gas pressure in first pipeline 300 increases continuously within the second time difference. Therefore, in order to avoid the first pipeline 300 from surging due to the continuous increase of the internal air pressure within the second time difference, the second time difference should be less than the third preset time. Specifically, the third preset time is 20 ms. Specifically, the second time difference is set to be smaller than the third preset time, so as to avoid the occurrence of surge in the first pipeline 300 due to a delay in the time when the relief valve 100 starts to open, and thus, the detection result obtained by the relief valve detection method disclosed in the present application is more accurate.

Example 2:

referring to fig. 2, an embodiment of the present application further discloses a pressure relief valve detection system, and the pressure relief valve detection method may be applied to the pressure relief valve detection system. The pressure relief valve 100 is disposed in the second pipeline 400, and the second pipeline 400 is connected to the first pipeline 300. Specifically, the first pipeline 300 has a first end and a second end, the first end of the first pipeline 300 is connected to the gas pressurizing device 500, the second end of the first pipeline 300 is openable and closable, the gas pressurizing device 500 can pressurize gas to form high-pressure gas, and introduce the high-pressure gas into the first pipeline 300, the high-pressure gas in the first pipeline 300 can be discharged from the second end of the first pipeline 300, and the relief valve detection system includes the pressure sensor 200 and the control device. The pressure sensor 200 is disposed in the second pipe 400, and the pressure sensor 200 may detect the pressure of the gas passing through the second pipe 400. The control device is in communication with the pressure relief valve 100 to obtain a first moment at which the pressure relief valve 100 starts to open, and is also in communication with the pressure sensor 200 to obtain a second moment at which the gas pressure of the gas passing through the pressure relief valve 100 reaches a maximum value.

And comparing the first time difference with a first preset time by the control device, and determining that the pressure relief valve 100 in the detection system is in a qualified state when the first time difference is smaller than the first preset time. And in the case that the first time difference is greater than the first preset time, determining that the pressure relief valve 100 in the detection system is in a failure state.

Example 3:

the embodiment of the application also discloses an engine, which comprises the pressure relief valve detection system. The engine further comprises an air cylinder, an air inlet pipe, an air release pipe and a supercharger, wherein a first pipeline 300 in the pressure release valve detection system is the air inlet pipe of the engine, two ends of the air inlet pipe are respectively connected with the air cylinder and the supercharger, and the supercharger can convey high-pressure gas into the air cylinder through the air inlet pipe. The second pipeline 400 in the pressure relief valve detection system is the air leakage pipe of the engine, the air leakage pipe is connected with the air inlet pipe, and the pressure relief valve 100 is arranged at the joint of the air leakage pipe and the air inlet pipe or in the air leakage pipe. The pressure sensor 200 is disposed in the air release pipe to monitor the pressure of the air passing through the air release pipe, and a throttle valve is disposed between the air inlet pipe and the air cylinder, and the throttle valve is an air outlet valve port 310 disposed in the first pipeline 300 in the pressure relief valve detection system.

During the operation of the engine, the supercharger continuously conveys high-pressure gas into the cylinder through the air inlet pipe. When the throttle is released, the throttle valve begins to close, the supercharger can increase the air pressure of air in the air inlet pipe in a short time due to inertia, and the high-pressure air in the air inlet pipe can be discharged through the pressure relief valve 100 so as to prevent the surging of the engine. Whether the engine surging occurs or not can be judged by obtaining a first moment when the pressure relief valve 100 starts to open and a second moment when the pressure measured by the pressure sensor 200 reaches the maximum value, and comparing a first time difference between the first moment and the second moment with a first preset time.

Specifically, when the engine is disposed in a whole vehicle, a vehicle-mounted computer of the whole vehicle may be in communication connection with the pressure release valve 100 and the pressure sensor 200 to obtain a first time when the pressure release valve 100 starts to open and a second time when a pressure value measured by the pressure sensor 200 reaches a maximum value.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.