A digital measuring device for pressure and leakage rate of safety valve

Abstract

The utility model relates to a kind of safety valve pressure and leakage rate digitization measuring device, comprising: box, industrial computer, multichannel analog-digital conversion module, industrial control board, optical fiber opposite transmission sensor, set leak device and switching power module;Industrial computer is used to control test procedure, handle sensor data, calculate safety valve performance parameter and provide man-machine interface;Multichannel analog-digital conversion module is used to acquire analog signal from pressure sensor and converts analog signal into digital signal transmission to industrial computer;Set leak device is set in the inside of box, for collecting leakage gas and forming bubble in liquid;Optical fiber opposite transmission sensor is used to detect the bubble passing through in the air pipe of set leak device and causes the light path interruption signal;Industrial control board is used to handle bubble detection signal and transmit it to industrial computer.Compared with prior art, the utility model has high-precision measurement, accurate and reliable result;Highly integrated function, improve calibration efficiency;Digital data management and other advantages.

Description

Technical Field

[0001] This utility model relates to the technical field of safety valve testing equipment, and in particular to a digital measurement device for safety valve pressure and leakage rate. Background Technology

[0002] As a crucial safety accessory for special equipment, the regular calibration of safety valves is essential for ensuring the safe operation of the equipment. Traditional safety valve calibration methods typically use mechanical pressure gauges and separate leakage detection devices, which suffer from problems such as large reading errors, inconvenient data recording, and inaccurate leakage rate measurement. With the increasing demands for industrial safety and the development of digital technology, there is an urgent need for an integrated device capable of accurately and digitally measuring the set pressure and leakage rate of safety valves to improve calibration efficiency and accuracy, and to achieve traceability of calibration data.

[0003] CN202111481513.5 discloses an experimental apparatus for studying acoustic emission signals caused by internal leakage in a safety valve, including a gas supply device, a safety valve internal leakage prototype, a leakage detection device, and an acoustic emission monitoring system. The gas supply device provides a gas source for the safety valve internal leakage prototype. The safety valve internal leakage prototype can be equipped with valve discs of different damage types, and different leakage conditions can be simulated by replacing the valve discs. The leakage detection device is a soap film flow meter used to measure the leakage rate of the safety valve internal leakage prototype. The acoustic emission monitoring system collects, analyzes, and processes the acoustic emission signals at the leakage point of the safety valve internal leakage prototype. However, the equipment integration is not high, and the process is relatively cumbersome. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology by providing a digital measurement device for safety valve pressure and leakage rate, which provides high-precision measurement with accurate and reliable results; highly integrated functions to improve calibration efficiency; and digital data management to achieve full traceability.

[0005] The objective of this utility model can be achieved through the following technical solutions: This utility model provides a digital measurement device for safety valve pressure and leakage rate, including: a housing, an industrial control all-in-one computer, a multi-channel analog-to-digital converter module, an industrial control board, a fiber optic sensor, a leakage collector, and a switching power supply module; The industrial control all-in-one computer is located on the front of the enclosure and is used to control the test process, process sensor data, calculate safety valve performance parameters, and provide a human-machine interface. The multi-channel analog-to-digital converter module is connected to the sensor aviation plug located on the side of the housing, and is used to collect analog signals from the pressure sensor and convert the analog signals into digital signals for transmission to the industrial control all-in-one computer. The leak collector is installed inside the box and has a waterproof and breathable valve on the top. The leak collector is connected to the outlet of the safety valve under test through a leak guide pipe and a 90° air pipe connector. It is used to collect leaked gas and form bubbles in the liquid. The waterproof and breathable valve is used to discharge leaked gas and prevent the airflow from blowing out the liquid in the leak collector. The fiber optic through-beam sensor includes a transmitter and a receiver, which are arranged opposite to each other on both sides of the leak collector to detect the optical path interruption signal caused by air bubbles passing through the air tube of the leak collector. The industrial control board is connected to the fiber optic through-beam sensor and is used to process the bubble detection signal and transmit it to the industrial control all-in-one computer. The switching power supply module is used to supply power to the various components in the device.

[0006] Furthermore, the multi-channel analog-to-digital converter module is a six-channel differential signal acquisition and conversion module, and the sensor aviation connector has six ports. It is suitable for a safety valve calibration bench with a maximum of six channels.

[0007] Furthermore, the side of the enclosure is also equipped with a power interface, which is a three-pin aviation plug for connecting to an external power source.

[0008] Furthermore, the side of the enclosure is also equipped with a host computer interface, which is used to exchange signals with the computer on the safety valve calibration bench.

[0009] Furthermore, the side of the enclosure is also equipped with indicator lights and a switch knob, which are used to indicate the power status of the device and control the device to be powered on, respectively.

[0010] Furthermore, the bottom of the drain collector is equipped with an LED light for providing internal lighting for the device.

[0011] Furthermore, the front of the housing is provided with a liquid level viewing window, which facilitates observation of the liquid level and air bubbles inside the leak collector.

[0012] Furthermore, the signal from the fiber optic through-beam sensor is processed by a fiber optic signal amplifier.

[0013] Furthermore, it also includes fuses, located in the input circuit of the switching power supply module, for overcurrent and short-circuit protection.

[0014] Furthermore, a sealing ring is also provided on the cover plate installed on the box for sealing and protection.

[0015] The device measurement includes the following steps: Connect the pressure sensor on the calibration bench via the sensor aviation connector; Connect the outlet of the safety valve under test to the leak collector via a 90° air pipe connector and a leak guide tube. Start the test using an industrial control all-in-one computer; The multi-channel analog-to-digital converter module collects pressure signals in real time and transmits them to the industrial control all-in-one computer. Gas leaking from the safety valve forms bubbles in the leak collector. The fiber optic sensor detects the bubble signal, which is then processed by the industrial control board and transmitted to the industrial control all-in-one computer. The industrial control computer processes pressure and bubble signals, calculates and displays the set pressure and leakage rate of the safety valve.

[0016] Compared with the prior art, the present invention has the following advantages: (1) High-precision measurement, accurate and reliable results. A multi-channel analog-to-digital converter module is used for differential signal acquisition, which directly converts the analog pressure signal into a high-precision digital signal; at the same time, a fiber optic through-beam sensor is used to count the bubbles photoelectrically, avoiding subjective errors caused by human observation and timing. The entire measurement process from pressure to leakage rate is digitized, which improves the accuracy of the data.

[0017] (2) Highly integrated functions improve calibration efficiency. The two major functions of pressure calibration and leakage rate measurement are integrated into one device. Through unified industrial control computer control, users can complete the testing of the two most critical performance parameters of the safety valve (set pressure and leakage rate) at one time, thus improving calibration efficiency.

[0018] (3) Digital data management enables full traceability. The industrial control computer automatically records, processes, and stores all test data (such as pressure curves, bubble counts, calculated leakage rates, etc.). It facilitates data retrieval, historical comparison, and automatic report generation, meeting the data traceability requirements for special equipment safety verification. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a digital measurement device for safety valve pressure and leakage rate.

[0020] Reference numerals: 1. Power interface; 2. Host computer interface; 3. Sensor aviation connector; 4. Industrial control all-in-one computer; 5. Liquid level window; 6. Indicator light; 7. Switch knob; 8. Fuse; 9. Sealing ring; 10. 90° air pipe connector; 11. Waterproof and breathable valve; 12. Leakage guide pipe; 13. Leakage collector; 14. Fiber optic through-beam sensor; 15. LED light; 16. Fiber optic signal amplifier; 17. Multi-channel analog-to-digital converter module; 18. Switching power supply module; 19. Industrial control board; 20. Enclosure. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0022] Example 1 This embodiment provides a digital measurement device for safety valve pressure and leakage rate, such as... Figure 1 As shown, it includes: a housing 20, an industrial control all-in-one computer 4, a multi-channel analog-to-digital converter module 17, an industrial control board 19, a fiber optic through-beam sensor 14, a drain collector 13, and a switching power supply module 18; The industrial control all-in-one computer 4 is located on the front of the housing 20 and is used to control the test process, process sensor data, calculate safety valve performance parameters, and provide a human-machine interface. The multi-channel analog-to-digital converter module 17 is connected to the sensor aviation plug 3 located on the side of the housing 20, and is used to collect analog signals from the pressure sensor and convert the analog signals into digital signals for transmission to the industrial control all-in-one computer 4; The leak collector 13 is installed inside the housing 20, and a waterproof and breathable valve 11 is provided on the top. The leak collector 13 is connected to the outlet of the safety valve under test through a leak guide pipe 12 and a 90° air pipe connector 10. It is used to collect leaked gas and form bubbles in the liquid. The waterproof and breathable valve 11 is used to discharge leaked gas and prevent the airflow from blowing out the liquid in the leak collector 13. The fiber optic through-beam sensor 14 includes a transmitter and a receiver, which are arranged opposite to each other on both sides of the leak collector 13, and are used to detect the optical path interruption signal caused by air bubbles passing through the air tube of the leak collector 13. The industrial control board 19 is connected to the fiber optic through-beam sensor 14 and is used to process the bubble detection signal and transmit it to the industrial control all-in-one computer 4. The switching power supply module 18 is used to supply power to the various components in the device.

[0023] Example 2 This embodiment provides a digital measurement device for safety valve pressure and leakage rate, such as... Figure 1 As shown, it includes: a housing 20, an industrial control all-in-one computer 4, a multi-channel analog-to-digital converter module 17, an industrial control board 19, a fiber optic through-beam sensor 14, a drain collector 13, and a switching power supply module 18; The industrial control all-in-one computer 4 is located on the front of the housing 20 and is used to control the test process, process sensor data, calculate safety valve performance parameters, and provide a human-machine interface. The multi-channel analog-to-digital converter module 17 is connected to the sensor aviation plug 3 located on the side of the housing 20, and is used to collect analog signals from the pressure sensor and convert the analog signals into digital signals for transmission to the industrial control all-in-one computer 4; The leak collector 13 is installed inside the housing 20, and a waterproof and breathable valve 11 is provided on the top. The leak collector 13 is connected to the outlet of the safety valve under test through a leak guide pipe 12 and a 90° air pipe connector 10. It is used to collect leaked gas and form bubbles in the liquid. The waterproof and breathable valve 11 is used to discharge leaked gas and prevent the airflow from blowing out the liquid in the leak collector 13. The fiber optic through-beam sensor 14 includes a transmitter and a receiver, which are arranged opposite to each other on both sides of the leak collector 13, and are used to detect the optical path interruption signal caused by air bubbles passing through the air tube of the leak collector 13. The industrial control board 19 is connected to the fiber optic through-beam sensor 14 and is used to process the bubble detection signal and transmit it to the industrial control all-in-one computer 4. The switching power supply module 18 is used to supply power to the various components in the device.

[0024] In a specific implementation, the multi-channel analog-to-digital converter module 17 is a six-channel differential signal acquisition and conversion module, and the sensor aviation plug 3 has six plugs. It is suitable for a safety valve calibration bench with a maximum of six channels.

[0025] In a specific embodiment, the side of the housing 20 is also provided with a power interface 1, which is a three-core aviation plug for connecting to an external power source.

[0026] In a specific embodiment, the side of the housing 20 is also provided with a host computer interface 2, which is used to interact with the computer of the safety valve calibration bench.

[0027] In a specific embodiment, the side of the housing 20 is also provided with an indicator light 6 and a switch knob 7, which are used to indicate the power status of the device and control the device to be powered on, respectively.

[0028] In a specific embodiment, the bottom of the drain collector 13 is provided with an LED light 15 for providing internal lighting for the device.

[0029] In a specific embodiment, the front of the housing 20 is provided with a liquid level viewing window 5, which facilitates observation of the liquid level and air bubble situation inside the leak collector 13.

[0030] In a specific embodiment, the signal from the fiber optic through-beam sensor 14 is processed by the fiber optic signal amplifier 16.

[0031] In a specific implementation, a fuse 8 is also included, located in the input circuit of the switching power supply module 18, for overcurrent and short-circuit protection.

[0032] In a specific embodiment, a sealing ring 9 is also provided on the cover plate installed on the housing 20 for sealing and protection.

[0033] The device measurement includes the following steps: Connect the pressure sensor on the calibration bench via sensor aviation plug 3; Connect the outlet of the safety valve under test to the leak collector 13 via a 90° air pipe connector 10 and a leak guide tube 12. Start the test via industrial control all-in-one computer 4; The multi-channel analog-to-digital converter module 17 collects pressure signals in real time and transmits them to the industrial control all-in-one computer 4; Gas leaking from the safety valve forms bubbles in the leak collector 13. The fiber optic sensor 14 detects the bubble signal, which is then processed by the industrial control board 19 and transmitted to the industrial control all-in-one computer 4. The industrial control all-in-one computer 4 processes pressure and bubble signals, calculates and displays the set pressure and leakage rate of the safety valve.

[0034] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0035] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A digital measurement device for safety valve pressure and leakage rate, characterized in that, include: The enclosure (20), the industrial control computer (4), the multi-channel analog-to-digital converter module (17), the industrial control board (19), the fiber optic through-beam sensor (14), the drain collector (13), and the switching power supply module (18). The industrial control all-in-one computer (4) is located on the front of the housing (20) and is used to control the test process, process sensor data, calculate the performance parameters of the safety valve and provide a human-machine interface. The industrial control all-in-one computer (4) receives the digital signal transmitted by the multi-channel analog-to-digital conversion module (17) and the bubble detection signal transmitted by the industrial control board (19). The multi-channel analog-to-digital converter module (17) is connected to the sensor aviation plug (3) located on the side of the housing (20) and is used to collect analog signals from the pressure sensor and convert the analog signals into digital signals for transmission to the industrial control computer (4). The leak collector (13) is installed inside the housing (20) and has a waterproof and breathable valve (11) on the top. The leak collector (13) is connected to the outlet of the safety valve under test through a leak guide pipe (12) and a 90° air pipe connector (10) to collect leaked gas and form bubbles in the liquid. The waterproof and breathable valve (11) is used to discharge leaked gas and prevent excessive airflow from blowing out the liquid in the leak collector (13). The fiber optic through-beam sensor (14) includes a transmitter and a receiver, which are arranged opposite to each other on both sides of the leak collector (13) to detect the optical path interruption signal caused by the passage of air bubbles in the air tube of the leak collector (13). The industrial control board (19) is connected to the fiber optic through-beam sensor (14) and is used to process the bubble detection signal and transmit it to the industrial control all-in-one computer (4). The switching power supply module (18) is used to supply power to the various components in the device.

2. The digital measurement device for safety valve pressure and leakage rate according to claim 1, characterized in that, The multi-channel analog-to-digital converter module (17) is a six-channel differential signal acquisition and conversion module, and the sensor aviation plug (3) has six plugs.

3. The digital measurement device for safety valve pressure and leakage rate according to claim 1, characterized in that, The side of the enclosure (20) is also provided with a power interface (1), which is a three-core aviation plug for connecting to an external power source.

4. The digital measurement device for safety valve pressure and leakage rate according to claim 1, characterized in that, The side of the housing (20) is also provided with a host computer interface (2), which is used to communicate with the computer of the safety valve test bench.

5. The digital measurement device for safety valve pressure and leakage rate according to claim 1, characterized in that, The side of the housing (20) is also provided with an indicator light (6) and a switch knob (7), which are used to indicate the power status of the device and control the device to be powered on, respectively.

6. The digital measurement device for safety valve pressure and leakage rate according to claim 1, characterized in that, The bottom of the drain collector (13) is equipped with an LED light (15) for providing internal lighting for the device.

7. The digital measurement device for safety valve pressure and leakage rate according to claim 1, characterized in that, The front of the housing (20) is provided with a liquid level viewing window (5) to facilitate observation of the liquid level and bubble situation inside the collector (13).

8. The digital measurement device for safety valve pressure and leakage rate according to claim 1, characterized in that, The signal from the fiber optic through-beam sensor (14) is processed by the fiber optic signal amplifier (16).

9. The digital measurement device for safety valve pressure and leakage rate according to claim 1, characterized in that, It also includes a fuse (8), located in the input circuit of the switching power supply module (18), for overcurrent and short-circuit protection.

10. The digital measurement device for safety valve pressure and leakage rate according to claim 1, characterized in that, A sealing ring (9) is also provided on the cover plate installed on the housing (20) for sealing and protection.

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