A valve fault diagnosis leak detection method and apparatus

Abstract

The application provides a valve fault diagnosis leak detection method, comprising the following steps: S1: installing pressure, temperature and humidity detection equipment; the pressure detection equipment is a pressure sensor, and the temperature and humidity detection equipment is a temperature and humidity sensor; the pressure sensor is installed between a valve and a pipeline and outside the valve, and the temperature and humidity sensor is installed outside the valve; S2: opening or closing the valve and ventilating the inside of the pipeline on the valve side. Different position recessed grooves can be selected according to the shape of the valve body, and the box and the sealing box cover are installed on the valve body, so that the valve body of different shapes can be conveniently detected, and the accuracy of the detection result can be improved by cooperation of the first pressure sensor, the second pressure sensor and the temperature and humidity sensor. The recessed grooves are formed on the box and the sealing box cover, the two ends of the valve body can be installed in the corresponding recessed grooves according to the shape of the valve body, a ring is installed between the pipeline and the valve body, the valve body can be conveniently detected by cooperation of the first pressure sensor, the second pressure sensor and the temperature and humidity sensor, and the accuracy of the detection result can be improved.

Description

Technical Field

[0001] This invention relates to the field of valve fault detection technology, specifically to a leakage detection method and apparatus for valve fault diagnosis. Background Technology

[0002] Marine valves are devices used to control the pressure, flow rate, and direction of fluids within ship pipelines to meet the environmental conditions of a vessel. Due to prolonged use, marine valves are susceptible to corrosion by fluids, therefore, it is necessary to detect leaks and malfunctions in marine valves.

[0003] The invention patent with publication number CN110997611A discloses a valve leakage detection device and its application method, including a first mounting housing, a second mounting housing movably connected to the top of the first mounting housing, a first stepped semicircular groove formed on the top of the first mounting housing, and a second stepped semicircular groove formed on the bottom of the second mounting housing, with rubber sleeves fixedly connected to the inner surfaces of both the second and first stepped semicircular grooves; this device can only detect straight-through valves. When the valve is L-shaped, this device cannot detect it. Furthermore, the high humidity around ship valves can cause condensation on the valves, affecting the detection results and reducing accuracy.

[0004] Therefore, the present invention provides a leakage detection method and apparatus for valve fault diagnosis. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a leakage detection method and apparatus for valve fault diagnosis, thereby solving the problems mentioned in the background art. The present invention can select concave grooves at different positions according to the shape of the valve body, and install the housing and sealing cover on the valve body, which facilitates the detection of valve bodies of different shapes. Furthermore, by using the cooperation of a first pressure sensor, a second pressure sensor, and a temperature and humidity sensor to detect the valve body, the accuracy of the detection results can be improved.

[0006] To achieve the above objectives, the present invention provides a leakage detection method for valve fault diagnosis, comprising the following steps:

[0007] S1: Install pressure, temperature and humidity detection equipment: The pressure detection equipment is a pressure sensor, and the temperature and humidity detection equipment is a temperature and humidity sensor. The pressure sensor is installed between the valve and the pipeline and on the outside of the valve, and the temperature and humidity sensor is installed on the outside of the valve.

[0008] S2: Open or close the valve and allow air to pass into the pipe on one side of the valve;

[0009] S3: Obtain the pressure at both ends of the valve, the pressure around the valve, and the temperature and humidity: Obtain the pressure at one or both ends of the valve and the pressure around the valve through a pressure sensor, and simultaneously obtain the temperature and humidity around the valve through a temperature and humidity sensor.

[0010] S4: Determine if the valve is leaking based on changes in pressure, temperature, and humidity: When there is medium in the pipeline, directly observe the values ​​of the pressure sensors at both ends of the valve and the pressure sensor on the outside of the valve, as well as the values ​​of the temperature and humidity sensors. If the values ​​of the pressure sensors at both ends of the valve are inconsistent, or if the temperature of the temperature and humidity sensors decreases while the humidity increases, then the valve is leaking. When there is no medium in the pipeline, close the valve adjacent to the valve that needs to be detected, introduce high-pressure gas into one side of the pipeline, and observe the changes in the values ​​of the pressure sensor at the valve outlet and the pressure sensor on the outside of the valve. If the values ​​change, then there is a leak.

[0011] Furthermore, when installing the pressure sensor and temperature and humidity sensor in step S1, the pressure sensor and temperature and humidity sensor need to be installed in a sealed container to ensure the accuracy of the pressure sensor and temperature and humidity sensor.

[0012] Furthermore, when opening, closing, or venting the valve in step S2, it is necessary to know in advance whether there is a medium inside the pipeline.

[0013] Furthermore, the pressure sensor and temperature / humidity sensor values ​​obtained in step S3 are all values ​​within a fixed time period.

[0014] A leakage detection device for valve fault diagnosis includes a housing and a valve body. The valve body is installed inside the housing via a sealed cover. A pipe is installed between the two ends of the valve body. A first mounting ring and a second mounting ring are respectively fixed to the pipe and the valve body by bolts. The top of the first mounting ring and the second mounting ring are provided with mounting holes. The inner wall of the mounting holes is provided with internal threads. A second pressure sensor and a temperature and humidity sensor are respectively installed on both sides of the inner wall of the top of the housing. A display is fixedly installed inside the front end of the housing. The bottom of the housing and the sides and bottom of the sealed cover are provided with concave grooves.

[0015] Furthermore, an inflation head is mounted on the top of the first mounting ring via a mounting hole and an internal thread, and an external thread is provided on the outer side of the inflation head, which is installed inside the mounting hole.

[0016] Furthermore, a first pressure sensor is mounted on the top of the second mounting ring via a mounting hole and an internal thread, and the first pressure sensor is screwed into the inside of the mounting hole.

[0017] Furthermore, a microcontroller and a battery are installed inside the enclosure. The microcontroller is electrically connected to a display, a first pressure sensor, a second pressure sensor, a temperature and humidity sensor, and the battery via wires.

[0018] Furthermore, the concave grooves are all semi-circular in shape, and both ends of the valve body are installed inside the concave grooves. A sealing gasket is provided between the valve body and the concave grooves.

[0019] Furthermore, a sealing plate is installed inside the concave groove at the bottom, and fixing blocks are provided at the top and bottom between the sealing box cover and the box body, with fastening bolts screwed into the fixing blocks.

[0020] The beneficial effects of the present invention: The present invention provides a leakage detection method and device for valve fault diagnosis, comprising a housing, a sealing cover, a display, a first mounting ring, a second mounting ring, a mounting hole, an inflation head, a first pressure sensor, a pipe, a temperature and humidity sensor, a valve body, a second pressure sensor, a sealing gasket, a concave groove, a sealing plug, and a fixing block.

[0021] The leakage detection method and device for valve fault diagnosis have concave grooves on both the housing and the sealing cover. According to the shape of the valve body, both ends of the valve body can be installed inside the corresponding concave grooves. By installing a mounting ring between the pipeline and the valve body, leakage detection of the valve body can be easily performed by the cooperation of the first pressure sensor, the second pressure sensor and the temperature and humidity sensor, which can improve the accuracy of the detection results.

[0022] The leakage detection method and device for valve fault diagnosis involves installing a sealing gasket between the valve body and the concave groove, and installing a sealing plug inside the unused concave groove to facilitate the formation of a sealed state through the housing and sealing cover, thereby ensuring the accuracy of the second pressure sensor detection.

[0023] The leakage detection method and device for valve fault diagnosis can select to install an air inlet or a first pressure sensor on the top of the first mounting ring according to whether there is a medium inside the pipeline. Then, the pressure values ​​and pressure changes at both ends of the valve body are obtained from the first pressure sensor and the second pressure sensor. Combined with the value changes of the temperature and humidity sensor, leakage detection of the valve body can be easily performed. Attached Figure Description

[0024] Figure 1 This is a flowchart of a leakage detection method for valve fault diagnosis according to the present invention;

[0025] Figure 2 This is a structural diagram of a leakage detection device for valve fault diagnosis according to the present invention;

[0026] Figure 3This is a front cross-sectional view of a leakage detection device for valve fault diagnosis according to the present invention;

[0027] Figure 4 This is a structural diagram of the housing of a leakage detection device for valve fault diagnosis according to the present invention;

[0028] Figure 5 This is a structural diagram of the first mounting ring of a leakage detection device for valve fault diagnosis according to the present invention;

[0029] In the diagram: 1. Box body; 2. Sealed box cover; 3. Display; 4. First mounting ring; 5. Second mounting ring; 6. Mounting hole; 7. Inflation head; 8. First pressure sensor; 9. Pipeline; 10. Temperature and humidity sensor; 11. Valve body; 12. Second pressure sensor; 13. Sealing gasket; 14. Concave groove; 15. Sealing plug; 16. Fixing block. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] Please see Figures 1 to 5 This invention provides a technical solution: a leakage detection method for valve fault diagnosis, comprising the following steps:

[0032] S1: Install pressure, temperature and humidity detection equipment: The pressure detection equipment is a pressure sensor, and the temperature and humidity detection equipment is a temperature and humidity sensor. The pressure sensor is installed between the valve and the pipeline and on the outside of the valve, and the temperature and humidity sensor is installed on the outside of the valve.

[0033] S2: Open or close the valve and allow air to pass into the pipe on one side of the valve;

[0034] S3: Obtain the pressure at both ends of the valve, the pressure around the valve, and the temperature and humidity: Obtain the pressure at one or both ends of the valve and the pressure around the valve through a pressure sensor, and simultaneously obtain the temperature and humidity around the valve through a temperature and humidity sensor.

[0035] S4: Determine if the valve is leaking based on changes in pressure, temperature, and humidity: When there is medium in the pipeline, directly observe the values ​​of the pressure sensors at both ends of the valve and the pressure sensor on the outside of the valve, as well as the values ​​of the temperature and humidity sensors. If the values ​​of the pressure sensors at both ends of the valve are inconsistent, or if the temperature of the temperature and humidity sensors decreases while the humidity increases, then the valve is leaking. When there is no medium in the pipeline, close the valve adjacent to the valve that needs to be detected, introduce high-pressure gas into one side of the pipeline, and observe the changes in the values ​​of the pressure sensor at the valve outlet and the pressure sensor on the outside of the valve. If the values ​​change, then there is a leak.

[0036] In this embodiment, when installing the pressure sensor and temperature and humidity sensor in step S1, the pressure sensor and temperature and humidity sensor need to be installed in a sealed container to ensure their accuracy. When opening, closing, or venting the valve in step S2, it is necessary to know in advance whether there is a medium inside the pipeline. The pressure sensor and temperature and humidity sensor values ​​obtained in step S3 are all values ​​within a fixed time period. Installing the pressure sensor in a sealed container can improve the accuracy of detection, and the presence of a medium inside the pipeline can be used to determine the valve's leakage status.

[0037] A leakage detection device for valve fault diagnosis includes a housing 1 and a valve body 11. The valve body 11 is installed inside the housing 1 via a sealing cover 2. A pipe 9 is installed between the two ends of the valve body 11. A first mounting ring 4 and a second mounting ring 5 are respectively fixed to the pipe 9 and the valve body 11 by bolts. The top of the first mounting ring 4 and the second mounting ring 5 are provided with mounting holes 6. The inner wall of the mounting holes 6 is provided with internal threads. A second pressure sensor 12 and a temperature and humidity sensor 10 are respectively installed on both sides of the inner wall of the top of the housing 1. A display 3 is fixedly installed inside the front end of the housing 1. The bottom of the housing 1 and the sides and bottom of the sealing cover 2 are provided with concave grooves 14. By installing the second pressure sensor 12 and the temperature and humidity sensor 10 inside the housing 1, it is convenient to seal the second pressure sensor 12 and the temperature and humidity sensor 10, reduce the influence of the external environment on the second pressure sensor 12 and the temperature and humidity sensor 10, and improve the detection accuracy of the second pressure sensor 12 and the temperature and humidity sensor 10.

[0038] In this embodiment, an inflation head 7 is installed on the top of the first mounting ring 4 through a mounting hole 6 and an internal thread. An external thread is provided on the outer side of the inflation head 7. The inflation head 7 is installed inside the mounting hole 6. The mounting hole 6 and the internal thread facilitate the installation of the inflation head 7 or the first pressure sensor 8, which is convenient for subsequent detection by the valve body 11.

[0039] In this embodiment, the top of the second mounting ring 5 is fitted with a first pressure sensor 8 through a mounting hole 6 and an internal thread. The first pressure sensor 8 is screwed into the inside of the mounting hole 6. A microcontroller and a battery are installed inside the housing 1. The microcontroller is electrically connected to the display 3, the first pressure sensor 8, the second pressure sensor 12, the temperature and humidity sensor 10, and the battery through wires. The microcontroller can display the acquired data on the display 3, thereby enabling intuitive observation of the data.

[0040] In this embodiment, the concave grooves 14 are all semi-circular in shape. The two ends of the valve body 11 are installed inside the concave grooves 14. A sealing gasket 13 is provided between the valve body 11 and the concave grooves 14. A sealing plug 15 is installed inside the bottom concave groove 14. Fixing blocks 16 are provided at the top and bottom between the sealing cover 2 and the box body 1. Fastening bolts are screwed into the inside of the fixing blocks 16. By installing the sealing gasket 13 between the valve body 11 and the concave grooves 14, the sealing performance between the valve body 11 and the box body 1 and the sealing cover 2 can be improved. The sealing plug 15 can seal the unused concave grooves 14, improving the sealing performance between the box body 1 and the sealing cover 2. The fixing blocks 16 and the fastening bolts facilitate the fixing between the box body 1 and the sealing cover 2.

[0041] When using the leakage detection method and device for valve fault diagnosis, during ship pipeline installation, the first mounting ring 4 and the second mounting ring 5 are installed between the two ends of the pipe 9 and the valve body 11 using bolts and flanges. The tops of the first mounting ring 4 and the second mounting ring 5 are screwed onto the first pressure sensor 8 through the mounting hole 6 and internal thread. When leakage detection of the valve body 11 is required, the housing 1 is installed on the valve body 11 from the rear, and according to the shape of the valve body 11, the two ends of the valve body 11 are installed inside the corresponding concave groove 14. A sealing gasket 13 is installed between the valve body 11 and the concave groove 14 to improve the sealing performance between them. A sealing plug 15 is installed inside the unused concave groove 14. The sealing box cover 2 is spliced ​​and installed with the box body 1, and a fastening bolt is screwed into the inside of the fixing block 16 to facilitate sealing between the box body 1 and the sealing box cover 2 through the sealing plug 15, forming a closed container between the box body 1 and the sealing box cover 2. The first pressure sensor 8 is electrically connected to the microcontroller via a wire. At this time, the valve body 11 is in the open state, controlling the fluid. The fluid flows inside pipe 9. The pressure of the fluid between the two ends of valve body 11 is obtained by the first pressure sensor 8 controlled by the microcontroller. When the values ​​of the first pressure sensor 8 at the two ends of valve body 11 are different, the valve body 11 can be judged to be leaking by combining the changes in the values ​​of the second pressure sensor 12 and the temperature and humidity sensor 10. Otherwise, no leakage has occurred. When there is no medium inside pipe 9, the two valves adjacent to the valve body 11 to be tested are closed. An air inlet 7 is installed on the top of the first mounting ring 4 and the first pressure sensor 8 is installed on the top of the second mounting ring 5. High-pressure gas is injected into the valve body 11 through an air compressor and the air inlet 7. The value of the second pressure sensor 12 and the value of the second pressure sensor 12 are displayed on the display 3 and observed. According to the changes in the value of the second pressure sensor 12 and the data of the second pressure sensor 12 and the temperature and humidity sensor 10, it is judged whether there is air leakage in valve body 11. That is, when the value of the second pressure sensor 12 decreases, when the value of the second pressure sensor 12 increases, and when the value of the second pressure sensor 12 decreases, there is leakage.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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.

Claims

1. A leakage detection method for valve fault diagnosis, characterized in that, Includes the following steps: S1: Install pressure, temperature and humidity detection equipment: The pressure detection equipment is a pressure sensor, and the temperature and humidity detection equipment is a temperature and humidity sensor. The pressure sensor is installed between the valve and the pipeline and on the outside of the valve, and the temperature and humidity sensor is installed on the outside of the valve. S2: Open or close the valve and allow air to pass into the pipe on one side of the valve; S3: Obtain the pressure at both ends of the valve, the pressure around the valve, and the temperature and humidity: Obtain the pressure at one or both ends of the valve and the pressure around the valve through a pressure sensor, and simultaneously obtain the temperature and humidity around the valve through a temperature and humidity sensor. S4: Determine if a valve is leaking based on changes in pressure, temperature, and humidity: When there is a medium in the pipeline, directly observe the values ​​of the pressure sensors at both ends of the valve and the pressure sensor on the outside of the valve, as well as the values ​​of the temperature and humidity sensors. If the values ​​of the pressure sensors at both ends of the valve are inconsistent, or if the temperature of the temperature and humidity sensors decreases while the humidity increases, then the valve is leaking. When there is no medium in the pipeline, close the valve adjacent to the valve that needs to be detected, introduce high-pressure gas into one side of the pipeline, and observe the changes in the values ​​of the pressure sensor at the valve outlet and the pressure sensor on the outside of the valve. If the values ​​change, then there is a leak. When installing the pressure sensor and temperature and humidity sensor in step S1, the pressure sensor and temperature and humidity sensor need to be installed in a sealed container to ensure the accuracy of the pressure sensor and temperature and humidity sensor.

2. The leakage detection method for valve fault diagnosis according to claim 1, characterized in that: When opening, closing, or venting the valve in step S2, it is necessary to know in advance whether there is a medium inside the pipeline.

3. The leakage detection method for valve fault diagnosis according to claim 1, characterized in that: The pressure sensor and temperature / humidity sensor values ​​obtained in step S3 are all values ​​within a fixed time period.

4. A leakage detection device for implementing valve fault diagnosis as described in claim 1, comprising a housing and a valve body, characterized in that: The valve body is installed inside the housing via a sealing cover. A pipe is installed between the two ends of the valve body. A first mounting ring and a second mounting ring are respectively fixed to the pipe and the valve body by bolts. The top of the first mounting ring and the second mounting ring are provided with mounting holes, and the inner wall of the mounting holes is provided with internal threads. A second pressure sensor and a temperature and humidity sensor are respectively installed on both sides of the inner wall of the top of the housing. A display is fixedly installed inside the front end of the housing. The bottom of the housing and the sides and bottom of the sealing cover are provided with concave grooves. The top of the second mounting ring is installed with a first pressure sensor through the mounting hole and internal threads. The first pressure sensor is screwed into the mounting hole.

5. A leakage detection device for valve fault diagnosis according to claim 4, characterized in that: An inflation head is mounted on the top of the first mounting ring through a mounting hole and an internal thread. An external thread is provided on the outer side of the inflation head, and the inflation head is installed inside the mounting hole.

6. The leakage detection device for valve fault diagnosis according to claim 5, characterized in that: The enclosure contains a microcontroller and a battery. The microcontroller is electrically connected to a display, a first pressure sensor, a second pressure sensor, a temperature and humidity sensor, and the battery via wires.

7. A leakage detection device for valve fault diagnosis according to claim 6, characterized in that: The concave grooves are all semi-circular in shape, and both ends of the valve body are installed inside the concave grooves. A sealing gasket is provided between the valve body and the concave groove.

8. A leakage detection device for valve fault diagnosis according to claim 7, characterized in that: A sealing plate is installed inside the concave groove at the bottom. Fixing blocks are provided at the top and bottom between the sealing box cover and the box body. Fastening bolts are screwed into the inside of the fixing blocks.

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