Butterfly valve sealing performance test system and method

Abstract

The invention belongs to the technical field of nuclear power, and particularly relates to a butterfly valve sealing performance test system and method. According to the butterfly valve sealing performance test system provided by the invention, clamping sealing, boosting and pressure maintaining tests and result judgment are automatically carried out according to parameters such as the caliber and the test pressure of the butterfly valve which are input in real time, so that different test scenes can be accurately and flexibly adapted, and a full-process automatic pressing test of butterfly valve clamping sealing and water pressure is realized; the test result is automatically judged, and the accuracy, safety and reliability of the butterfly valve sealing test are greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power, and in particular relates to a butterfly valve sealing test system and method. Background Art

[0002] Butterfly valves are widely used in various system pipelines of nuclear power plants, especially in the pipelines of the seawater pump room of the primary cooling water circulation system, where a large number of butterfly valves with larger diameters are installed. Butterfly valves mainly play the role of isolating and cutting off the system medium in the system, and the quality of their sealing performance has a great impact on the safety and economic operation indicators of nuclear power plants.

[0003] Nuclear power plants pay much attention to the sealing performance of butterfly valves. During overhaul, they will arrange a considerable number of butterfly valves for sealing test and water pressure test according to the requirements of the preventive maintenance program to verify the sealing performance and structural integrity of the butterfly valves. The main means currently used by nuclear power plants is to install the butterfly valves on simple pressure testing equipment for manual pressure testing, or to use a simply processed blind plate to tighten the seal on site with bolts and use a manual pressure pump for pressure testing. Both methods are manual operation methods, and the test operation is cumbersome. They mainly rely on the operator's experience, and the operation and result judgment are carried out by manually adjusting the pressure, clamping the valve, increasing the pressure, and observing the pressure drop of the pointer pressure gauge with the naked eye. Human factors have a great influence on the test results, and the reliability and accuracy of the test results are low. In addition, there is a risk of leakage and spraying of high-pressure media due to the manual clamping and sealing of the valve. In view of this, it is urgent to improve the accuracy and safety reliability of butterfly valve sealing tests. Summary of the invention

[0004] In order to overcome the problems existing in the related art, a butterfly valve sealing test system and method are provided.

[0005] According to one aspect of an embodiment of the present disclosure, there is provided a butterfly valve sealing test system, the system comprising: an air-driven booster pump, a water pump, an oil pump, a water tank, an oil tank, an air-controlled ball valve, a water pressure sensor, an oil pressure sensor, a hydraulic gripper, a butterfly valve, a controller, a collection module and a host computer;

[0006] The air-driven booster pump is used to introduce the driving air source through the compressed air source inlet to increase the pressure of the valve cavity of the butterfly valve; the water pump is used to take water from the water tank to inject water into the valve cavity of the butterfly valve to increase the pressure;

[0007] The water pressure sensor is used to monitor the valve cavity pressure of the butterfly valve; the oil pump is used to increase the oil pressure to the hydraulic clamp; the oil pressure sensor is used to detect the clamping oil pressure of the hydraulic clamp; the air-controlled ball valve is used to control the on-off of the pipeline between the air-driven booster pump and the water pump and the butterfly valve; the host computer can control the electrical proportional valve, air-controlled ball valve, air-driven booster pump, water pump, oil pump, and hydraulic clamp through the controller; the acquisition module is used to obtain the water pressure sensor, oil pressure sensor, and the data collected by the oil pressure sensor and upload it to the host computer for display.

[0008] In a possible implementation, the following steps are used to perform a butterfly valve sealing test:

[0009] Step 1: The host computer determines the theoretical clamping oil pressure and test pressure required for the butterfly valve test according to the input test parameters. The test parameters include: the diameter of the test butterfly valve, the nominal pressure, and the test type;

[0010] Step 2: When the pressure test is started, the upper computer controls the oil pump to start, drive the hydraulic clamp to open and close radially and to retract axially, and pre-clamp the butterfly valve. Then, the actual clamping oil pressure detected by the oil pressure sensor is obtained, and the deviation between the actual clamping oil pressure and the theoretical clamping oil pressure is determined. The test clamping oil pressure is determined based on the deviation combined with the built-in automatic control algorithm of the upper computer, and then the hydraulic clamp is controlled to clamp the butterfly valve to the test clamping oil pressure.

[0011] Step 3: After the upper computer detects that the clamping oil pressure of the hydraulic clamping jaws reaches the test clamping oil pressure, the oil pump is stopped and the water pump is started to inject water into the valve cavity of the butterfly valve. When the upper computer detects that the valve cavity pressure of the butterfly valve reaches the preset pressure through the water pressure sensor, the water pump is stopped and the air-driven booster pump is started to increase the pressure of the valve cavity of the butterfly valve to the test pressure.

[0012] Step 4: After the upper computer detects that the valve cavity pressure of the butterfly valve reaches the test pressure, it stops the air-driven booster pump and enters the sealing pressure holding test stage; the upper computer detects the changes in the valve cavity pressure of the butterfly valve and the changes in the clamping oil pressure of the hydraulic clamp in real time. If it is detected that the clamping oil pressure drops beyond the preset threshold, the oil pressure secondary boosting mode is started to ensure the stability of the clamping sealing oil pressure required for the sealing test;

[0013] Step 5: After the pressure holding test phase is completed, the upper computer records the pressure drop value of the butterfly valve cavity, compares the pressure drop value of the valve cavity with the qualified standard of the butterfly valve sealing performance, and judges the sealing performance of the butterfly valve.

[0014] In one possible implementation, in step three, in the first half of the boost, the upper computer controls the air-driven boost pump to boost pressure at a first rate. When the upper computer detects through the water pressure sensor that the valve chamber pressure of the butterfly valve reaches a first pressure value, the upper computer controls the air-driven boost pump to boost pressure at a second rate, and the first rate is faster than the second rate.

[0015] In a possible implementation, the system further includes a filter for filtering the gas entering the air-driven booster pump from the inlet of the compressed air source.

[0016] In a possible implementation, the system further includes an accumulator, which is connected in the system and used for stably increasing the pressure of the butterfly valve cavity. After the pressure increase of the butterfly valve cavity is completed, the accumulator is isolated from the pipeline related to the pressure maintenance test.

[0017] In a possible implementation, the system further includes a pressure gauge, and the pressure gauge is used to display data collected by the water pressure sensor.

[0018] In a possible implementation, the system further includes a test plugging plate, which is arranged in a gap between the butterfly valve and the hydraulic clamp.

[0019] According to another aspect of the present disclosure, a butterfly valve sealing test method is provided, the method comprising:

[0020] Step 1: The host computer determines the theoretical clamping oil pressure and test pressure required for the butterfly valve test according to the input test parameters. The test parameters include: the diameter of the test butterfly valve, the nominal pressure, and the test type;

[0021] Step 2: When the pressure test is started, the upper computer controls the oil pump to start, drive the hydraulic clamp to open and close radially and to retract axially, and pre-clamp the butterfly valve. Then, the actual clamping oil pressure detected by the oil pressure sensor is obtained, and the deviation between the actual clamping oil pressure and the theoretical clamping oil pressure is determined. The test clamping oil pressure is determined based on the deviation combined with the built-in automatic control algorithm of the upper computer, and then the hydraulic clamp is controlled to clamp the butterfly valve to the test clamping oil pressure.

[0022] Step 3: After the upper computer detects that the clamping oil pressure of the hydraulic clamping jaws reaches the test clamping oil pressure, the oil pump is stopped and the water pump is started to inject water into the valve cavity of the butterfly valve. When the upper computer detects that the valve cavity pressure of the butterfly valve reaches the preset pressure through the water pressure sensor, the water pump is stopped and the air-driven booster pump is started to increase the pressure of the valve cavity of the butterfly valve to the test pressure.

[0023] Step 4: After the upper computer detects that the valve cavity pressure of the butterfly valve reaches the test pressure, it stops the air-driven booster pump and enters the sealing pressure holding test stage; the upper computer detects the changes in the valve cavity pressure of the butterfly valve and the changes in the clamping oil pressure of the hydraulic clamp in real time. If it is detected that the clamping oil pressure drops beyond the preset threshold, the oil pressure secondary boosting mode is started to ensure the stability of the clamping sealing oil pressure required for the sealing test;

[0024] Step 5: After the pressure holding test phase is completed, the upper computer records the pressure drop value of the butterfly valve cavity, compares the pressure drop value of the valve cavity with the qualified standard of the butterfly valve sealing performance, and judges the sealing performance of the butterfly valve.

[0025] According to another aspect of an embodiment of the present disclosure, a non-volatile computer-readable storage medium is provided, on which computer program instructions are stored, and the computer program instructions implement the above method when executed by a processor.

[0026] The beneficial effect of the present disclosure is that the butterfly valve sealing test system provided by the present disclosure automatically performs clamping sealing, pressure boosting, pressure holding tests and result judgment according to parameters such as the caliber and test pressure of the butterfly valve input in real time, thereby being able to accurately and flexibly adapt to different test scenarios, and realizing full-process automatic pressure testing of butterfly valve clamping sealing and water pressure, and automatically judging the test results, thereby greatly improving the accuracy and safety and reliability of butterfly valve sealing tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a butterfly valve sealing test system shown in an embodiment of the present disclosure.

[0028] In the figure:

[0029] 1. Compressed air source inlet; 2. Filter; 3. Electric proportional valve; 4. Air-driven booster pump;

[0030] 5. Low-pressure water pump; 6. Water tank; 7. Accumulator; 8. Air-controlled ball valve; 9. Water pressure sensor;

[0031] 10. Pressure gauge; 11. Oil pump; 12. Proportional relief valve; 13. Oil tank; 14. Oil pressure sensor;

[0032] 15. Hydraulic gripper; 16. Butterfly valve; 17. Test plug; 18. PLC controller; 19. Acquisition module;

[0033] 20. Host computer. DETAILED DESCRIPTION

[0034] The present disclosure is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Unless otherwise defined, the technical and scientific terms used in the present disclosure have the same meanings as those generally understood by those skilled in the art to which the present disclosure belongs; the terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the term "including" and any variations thereof in the present disclosure are intended to cover non-exclusive inclusions. Obviously, the embodiments described in the present disclosure are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative efforts are within the scope of protection of the present disclosure.

[0036] Reference to "embodiments" in this disclosure means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the disclosure. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] Figure 1 Schematic diagram of a butterfly valve sealing test system shown in an embodiment of the present disclosure. Figure 1 As shown, the system includes: a compressed air source inlet 1, a filter 2, an electric proportional valve 3, an air-driven booster pump 4, a water pump 5, a water tank 6, an accumulator 7, an air-controlled ball valve 8, a water pressure sensor 9, a pressure gauge 10, an oil pump 11, a proportional relief valve 12, an oil tank 13, an oil pressure sensor 14, a hydraulic gripper 15, a butterfly valve 16, a test plug 17, a controller 18, a collection module 19 and a host computer 20.

[0038] The driving air source of the air-driven booster pump 4 is introduced through the compressed air source inlet 1, the filter 2 and the electric proportional valve 3 to increase the pressure of the valve cavity of the butterfly valve 16; the water pump 5 is used to take water from the water tank 6 to inject water into the valve cavity of the butterfly valve 16 to increase the pressure; the accumulator 7 is connected to the system to stabilize the stable pressure increase of the valve cavity of the butterfly valve 16, and after the pressure increase of the valve cavity of the butterfly valve 16 is completed, it is isolated from the pipeline related to the pressure maintenance test; the water pressure sensor 9 is used to monitor the valve cavity pressure of the butterfly valve 16, and the pressure gauge 10 is used to display the data collected by the water pressure sensor 9; the oil pump 11 is used to supply pressure to the hydraulic clamp 15 Increase oil pressure; oil pressure sensor 14 is used to detect the clamping oil pressure of hydraulic clamp 15; air-controlled ball valve 8 is used to control the on-off of pipelines between air-driven booster pump 4 and water pump 5 and butterfly valve 16; host computer 20 can control electric proportional valve 3, air-controlled ball valve 8, proportional relief valve 12, air-driven booster pump 4, water pump 5, oil pump 11, hydraulic clamp 15 through controller 18; acquisition module 19 is used to obtain data collected by water pressure sensor 9, oil pressure sensor 14, and oil pressure sensor 14 in real time and upload to host computer 20 for processing and display. Test plug 17 is set in the gap between butterfly valve 16 and hydraulic clamp 15, so as to increase the stability of butterfly valve 16.

[0039] In a possible implementation, the following steps are used to perform a butterfly valve sealing test.

[0040] Step 1: Automatic calculation of test parameters: The user inputs the test parameters in the interactive interface of the host computer 20. The test parameters include: the diameter of the test butterfly valve, the nominal pressure, the test type (such as a sealing test or a water pressure test), the test pressure holding time and the maximum allowable pressure drop. The host computer 20 determines the theoretical clamping oil pressure and test pressure required for the butterfly valve test based on the input test parameters.

[0041] Step 2: Automatic clamping and sealing of the butterfly valve: The user clicks on the start test in the interface of the host computer 20 to perform an automatic pressure test. In the automatic control mode, the oil pump 11 is first started to drive the hydraulic clamp 15 to open and close radially and to retract axially, and the butterfly valve 16 is pre-clamped first; the host computer 20 obtains the actual clamping oil pressure detected by the oil pressure sensor 14, determines the deviation value between the actual clamping oil pressure and the theoretical clamping oil pressure, and determines the test clamping oil pressure according to the deviation value combined with the built-in automatic control algorithm of the host computer (such as PID control algorithm), and controls the hydraulic clamp 15 through the proportional relief valve 12 to clamp the butterfly valve 16 to the test clamping oil pressure. In this way, the present disclosure can obtain the theoretical clamping oil pressure according to the actual test needs, and further modify the test clamping oil pressure according to the actual pre-clamping oil pressure, thereby accurately and flexibly adapting to different test scenarios.

[0042] Step 3: The system automatically injects water to increase the pressure: After the upper computer 20 detects that the clamping oil pressure of the hydraulic clamp 15 reaches the test clamping oil pressure, the oil pump 11 is stopped and the water pump 5 is started to inject water into the valve cavity of the butterfly valve 16. When the upper computer detects through the water pressure sensor 9 that the valve cavity pressure of the butterfly valve 16 reaches a preset pressure (such as 0.2MPa), the water pump 5 is stopped and the air-driven booster pump 4 is started to increase the pressure of the valve cavity of the butterfly valve 16; in the first half of the pressure increase, the upper computer 20 controls the air-driven booster pump 4 to increase the pressure at a first rate. When the upper computer 20 detects through the water pressure sensor 9 that the pressure of the valve cavity of the butterfly valve 16 reaches a first pressure value (the first pressure value can be, for example, 80% of the test pressure), the air-driven booster pump 4 is controlled to increase the pressure at a second rate, and the first rate is faster than the second rate to ensure stable pressure increase to the test pressure.

[0043] Step 4: Automatic system pressure maintenance test: The upper computer 20 stops the air-driven booster pump 4 after detecting through the pressure sensor 9 that the valve cavity pressure of the butterfly valve 16 reaches the test pressure, and the system enters the pressure stabilization stage before the test; when the system meets the preset pressure maintenance test start conditions, the upper computer 20 enters the sealing pressure maintenance test stage; the upper computer detects the changes in the valve cavity pressure of the butterfly valve 16 and the changes in the clamping oil pressure of the hydraulic clamp 15 in real time. If it is detected that the clamping oil pressure drops by more than the preset threshold, the oil pressure secondary boosting mode is started to ensure the stability of the clamping sealing oil pressure required for the sealing test.

[0044] Step 5: Automatic result evaluation by the system: After the pressure holding test phase is completed, the upper computer 20 records the time series of the valve cavity pressure of the butterfly valve 16, determines the valve cavity pressure drop value based on the time series, compares the valve cavity pressure drop value with the butterfly valve sealing performance qualification standard, and judges the sealing performance of the butterfly valve 16.

[0045] The butterfly valve sealing test system provided by the present invention automatically performs clamping sealing, pressure increasing, pressure maintaining tests and result judgment according to real-time input parameters such as the diameter and test pressure of the butterfly valve, thereby being able to accurately and flexibly adapt to different test scenarios, and realizing full-process automatic pressure testing of butterfly valve clamping sealing and water pressure, and automatically judging the test results, which greatly improves the accuracy and safety and reliability of butterfly valve sealing tests.

[0046] In a possible implementation, a butterfly valve sealing test method is provided, the method comprising:

[0047] Step 1: The host computer determines the theoretical clamping oil pressure and test pressure required for the butterfly valve test according to the input test parameters. The test parameters include: the diameter of the test butterfly valve, the nominal pressure, and the test type;

[0048] Step 2: When the pressure test is started, the upper computer controls the oil pump to start, drive the hydraulic clamp to open and close radially and to retract axially, and pre-clamp the butterfly valve. Then, the actual clamping oil pressure detected by the oil pressure sensor is obtained, and the deviation between the actual clamping oil pressure and the theoretical clamping oil pressure is determined. The test clamping oil pressure is determined based on the deviation combined with the built-in automatic control algorithm of the upper computer, and then the hydraulic clamp is controlled to clamp the butterfly valve to the test clamping oil pressure.

[0049] Step 3: After the upper computer detects that the clamping oil pressure of the hydraulic clamping jaws reaches the test clamping oil pressure, the oil pump is stopped and the water pump is started to inject water into the valve cavity of the butterfly valve. When the upper computer detects that the valve cavity pressure of the butterfly valve reaches the preset pressure through the water pressure sensor, the water pump is stopped and the air-driven booster pump is started to increase the pressure of the valve cavity of the butterfly valve to the test pressure.

[0050] Step 4: After the upper computer detects that the valve cavity pressure of the butterfly valve reaches the test pressure, it stops the air-driven booster pump and enters the sealing pressure holding test stage; the upper computer detects the changes in the valve cavity pressure of the butterfly valve and the changes in the clamping oil pressure of the hydraulic clamp in real time. If it is detected that the clamping oil pressure drops beyond the preset threshold, the oil pressure secondary boosting mode is started to ensure the stability of the clamping sealing oil pressure required for the sealing test;

[0051] Step 5: After the pressure holding test phase is completed, the upper computer records the pressure drop value of the butterfly valve cavity, compares the pressure drop value of the valve cavity with the qualified standard of the butterfly valve sealing performance, and judges the sealing performance of the butterfly valve.

[0052] In a possible implementation, a butterfly valve sealing test device is provided, the device comprising:

[0053] A calculation module is used to determine the theoretical clamping oil pressure and test pressure required for the butterfly valve test according to the input test parameters. The test parameters include: the diameter of the test butterfly valve, the nominal pressure, and the test type;

[0054] The oil pressure adjustment module is used to start the oil pump under the control of the host computer when the pressure test is started, drive the hydraulic clamping claw to open and close radially and to retract axially, obtain the actual clamping oil pressure detected by the oil pressure sensor after pre-clamping the butterfly valve, determine the deviation between the actual clamping oil pressure and the theoretical clamping oil pressure, determine the test clamping oil pressure based on the deviation combined with the built-in automatic control algorithm of the host computer, and then control the hydraulic clamping claw to clamp the butterfly valve to the test clamping oil pressure;

[0055] The test module is used to stop the oil pump after detecting that the clamping oil pressure of the hydraulic clamping jaws reaches the test clamping oil pressure, and start the water pump to inject water into the valve cavity of the butterfly valve. When the upper computer detects through the water pressure sensor that the valve cavity pressure of the butterfly valve reaches the preset pressure, the water pump is stopped and the air-driven booster pump is started to increase the pressure of the valve cavity of the butterfly valve to the test pressure;

[0056] Step 4: After the upper computer detects that the valve cavity pressure of the butterfly valve reaches the test pressure, it stops the air-driven booster pump and enters the sealing pressure holding test stage; the upper computer detects the changes in the valve cavity pressure of the butterfly valve and the changes in the clamping oil pressure of the hydraulic clamp in real time. If it is detected that the clamping oil pressure drops beyond the preset threshold, the oil pressure secondary boosting mode is started to ensure the stability of the clamping sealing oil pressure required for the sealing test;

[0057] Step 5: After the pressure holding test phase is completed, the upper computer records the pressure drop value of the butterfly valve cavity, compares the pressure drop value of the valve cavity with the qualified standard of the butterfly valve sealing performance, and judges the sealing performance of the butterfly valve.

[0058] The description of the above method and device has been explained in detail in the description of the above system and will not be repeated here.

[0059] The present disclosure may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0060] A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0061] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0062] The computer program instructions for performing the operation of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be customized by utilizing the state information of the computer-readable program instructions, and the electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0063] Various aspects of the present disclosure are described herein with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer-readable program instructions.

[0064] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device that implements the functions / actions specified in one or more boxes in the flowchart and / or block diagram is generated. These computer-readable program instructions can also be stored in a computer-readable storage medium, and these instructions cause the computer, programmable data processing device, and / or other equipment to work in a specific manner, so that the computer-readable medium storing the instructions includes a manufactured product, which includes instructions for implementing various aspects of the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0065] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operating steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0066] The flow chart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to multiple embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a part of a module, program segment or instruction, and a part of the module, program segment or instruction includes one or more executable instructions for realizing the specified logical function. In some alternative implementations, the function marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous square boxes can actually be executed substantially in parallel, and they can sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or action, or can be implemented with a combination of special hardware and computer instructions.

[0067] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A butterfly valve sealing test system, characterized in that: The system includes: an air-driven booster pump, a water pump, an oil pump, a water tank, an oil tank, an air-controlled ball valve, a water pressure sensor, an oil pressure sensor, a hydraulic gripper, a butterfly valve, a controller, a collection module and a host computer; The air-driven booster pump is used to introduce the driving air source through the compressed air source inlet to increase the pressure of the valve cavity of the butterfly valve; the water pump is used to take water from the water tank to inject water into the valve cavity of the butterfly valve to increase the pressure; The water pressure sensor is used to monitor the valve cavity pressure of the butterfly valve; the oil pump is used to increase the oil pressure to the hydraulic clamp; the oil pressure sensor is used to detect the clamping oil pressure of the hydraulic clamp; the air-controlled ball valve is used to control the on-off of the pipeline between the air-driven booster pump and the water pump and the butterfly valve; the host computer can control the electrical proportional valve, air-controlled ball valve, air-driven booster pump, water pump, oil pump, and hydraulic clamp through the controller; the acquisition module is used to obtain the water pressure sensor, oil pressure sensor, and the data collected by the oil pressure sensor and upload it to the host computer for display.

2. The system according to claim 1, characterized in that Use the following steps to conduct a butterfly valve sealing test; Step 1: The host computer determines the theoretical clamping oil pressure and test pressure required for the butterfly valve test according to the input test parameters. The test parameters include: the diameter of the test butterfly valve, the nominal pressure, and the test type; Step 2: When the pressure test is started, the upper computer controls the oil pump to start, drive the hydraulic clamp to open and close radially and to retract axially, and pre-clamp the butterfly valve. Then, the actual clamping oil pressure detected by the oil pressure sensor is obtained, and the deviation between the actual clamping oil pressure and the theoretical clamping oil pressure is determined. The test clamping oil pressure is determined based on the deviation combined with the built-in automatic control algorithm of the upper computer, and then the hydraulic clamp is controlled to clamp the butterfly valve to the test clamping oil pressure. Step 3: After the upper computer detects that the clamping oil pressure of the hydraulic clamping jaws reaches the test clamping oil pressure, the oil pump is stopped and the water pump is started to inject water into the valve cavity of the butterfly valve. When the upper computer detects that the valve cavity pressure of the butterfly valve reaches the preset pressure through the water pressure sensor, the water pump is stopped and the air-driven booster pump is started to increase the pressure of the valve cavity of the butterfly valve to the test pressure. Step 4: After the upper computer detects that the valve cavity pressure of the butterfly valve reaches the test pressure, it stops the air-driven booster pump and enters the sealing pressure holding test stage; the upper computer detects the changes in the valve cavity pressure of the butterfly valve and the changes in the clamping oil pressure of the hydraulic clamp in real time. If it is detected that the clamping oil pressure drops beyond the preset threshold, the oil pressure secondary boosting mode is started to ensure the stability of the clamping sealing oil pressure required for the sealing test; Step 5: After the pressure holding test phase is completed, the upper computer records the pressure drop value of the butterfly valve cavity, compares the pressure drop value of the valve cavity with the qualified standard of the butterfly valve sealing performance, and judges the sealing performance of the butterfly valve.

3. The system according to claim 2, characterized in that In step three, in the first half of the boost process, the upper computer controls the air-driven boost pump to boost pressure at a first rate. When the upper computer detects through the water pressure sensor that the valve cavity pressure of the butterfly valve reaches a first pressure value, the upper computer controls the air-driven boost pump to boost pressure at a second rate, and the first rate is faster than the second rate.

4. The system according to claim 1, characterized in that The system further comprises a filter for filtering the gas entering the air-driven booster pump from the inlet of the compressed air source.

5. The system according to claim 1, characterized in that The system also includes an accumulator, which is connected in the system and used for stably increasing the pressure of the butterfly valve cavity. After the pressure increase of the butterfly valve cavity is completed, the accumulator is isolated from the pipeline related to the pressure maintenance test.

6. The system according to claim 1, characterized in that The system also includes a pressure gauge, which is used to display data collected by the water pressure sensor.

7. The system according to claim 1, characterized in that The system also includes a test plugging plate, which is arranged in the gap between the butterfly valve and the hydraulic clamping claw.

8. A butterfly valve sealing test method, characterized in that: The method comprises: Step 1: The host computer determines the theoretical clamping oil pressure and test pressure required for the butterfly valve test according to the input test parameters. The test parameters include: the diameter of the test butterfly valve, the nominal pressure, and the test type; Step 2: When the pressure test is started, the upper computer controls the oil pump to start, drive the hydraulic clamp to open and close radially and to retract axially, and pre-clamp the butterfly valve. Then, the actual clamping oil pressure detected by the oil pressure sensor is obtained, and the deviation between the actual clamping oil pressure and the theoretical clamping oil pressure is determined. The test clamping oil pressure is determined based on the deviation combined with the built-in automatic control algorithm of the upper computer, and then the hydraulic clamp is controlled to clamp the butterfly valve to the test clamping oil pressure. Step 3: After the upper computer detects that the clamping oil pressure of the hydraulic clamping jaws reaches the test clamping oil pressure, the oil pump is stopped and the water pump is started to inject water into the valve cavity of the butterfly valve. When the upper computer detects that the valve cavity pressure of the butterfly valve reaches the preset pressure through the water pressure sensor, the water pump is stopped and the air-driven booster pump is started to increase the pressure of the valve cavity of the butterfly valve to the test pressure. Step 4: After the upper computer detects that the valve cavity pressure of the butterfly valve reaches the test pressure, it stops the air-driven booster pump and enters the sealing pressure holding test stage; the upper computer detects the changes in the valve cavity pressure of the butterfly valve and the changes in the clamping oil pressure of the hydraulic clamp in real time. If it is detected that the clamping oil pressure drops beyond the preset threshold, the oil pressure secondary boosting mode is started to ensure the stability of the clamping sealing oil pressure required for the sealing test; Step 5: After the pressure holding test phase is completed, the upper computer records the pressure drop value of the butterfly valve cavity, compares the pressure drop value of the valve cavity with the qualified standard of the butterfly valve sealing performance, and judges the sealing performance of the butterfly valve.

9. A butterfly valve sealing test device, characterized in that: The device comprises: A calculation module is used to determine the theoretical clamping oil pressure and test pressure required for the butterfly valve test according to the input test parameters. The test parameters include: the diameter of the test butterfly valve, the nominal pressure, and the test type; The oil pressure adjustment module is used to start the oil pump under the control of the host computer when the pressure test is started, drive the hydraulic clamping claw to open and close radially and to retract axially, obtain the actual clamping oil pressure detected by the oil pressure sensor after pre-clamping the butterfly valve, determine the deviation between the actual clamping oil pressure and the theoretical clamping oil pressure, determine the test clamping oil pressure based on the deviation combined with the built-in automatic control algorithm of the host computer, and then control the hydraulic clamping claw to clamp the butterfly valve to the test clamping oil pressure; The test module is used to stop the oil pump after detecting that the clamping oil pressure of the hydraulic clamping jaws reaches the test clamping oil pressure, and start the water pump to inject water into the valve cavity of the butterfly valve. When the upper computer detects through the water pressure sensor that the valve cavity pressure of the butterfly valve reaches the preset pressure, the water pump is stopped and the air-driven booster pump is started to increase the pressure of the valve cavity of the butterfly valve to the test pressure; Step 4: After the upper computer detects that the valve cavity pressure of the butterfly valve reaches the test pressure, it stops the air-driven booster pump and enters the sealing pressure holding test stage; the upper computer detects the changes in the valve cavity pressure of the butterfly valve and the changes in the clamping oil pressure of the hydraulic clamp in real time. If it is detected that the clamping oil pressure drops beyond the preset threshold, the oil pressure secondary boosting mode is started to ensure the stability of the clamping sealing oil pressure required for the sealing test; Step 5: After the pressure holding test phase is completed, the upper computer records the pressure drop value of the butterfly valve cavity, compares the pressure drop value of the valve cavity with the qualified standard of the butterfly valve sealing performance, and judges the sealing performance of the butterfly valve.

10. A non-volatile computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the method of claim 8 is implemented.

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