A differential pressure driven valve action reliability test device

Abstract

The embodiment of the present application provides a kind of valve action reliability test device of differential pressure drive, including valve test loop, hot steam generating device and compressed air device, valve test loop includes the volume compensation pipeline section, third pressure gauge, quick-opening valve and measured valve that are sequentially arranged in turn along the direction of airflow, hot steam generating device and compressed air device are accessed into the gas inlet end of volume compensation pipeline section by parallel mode, first isolation valve is arranged between hot steam generating device and volume compensation pipeline section, second isolation valve is arranged between compressed air device and volume compensation pipeline section.The embodiment of the present application is integrated design by hot steam generating device and compressed air device, the design mode of sharing valve test loop, the switching of valve cold test and hot test is realized using the on-off of isolation valve, effectively meet the reliability test requirements of valve moving parts.

Description

Technical Field

[0001] This invention relates to the field of valve reliability testing technology, and in particular to a pressure differential driven valve operation reliability testing device. Background Technology

[0002] The developed pressure differential-driven rapid pressure relief valve is mainly used in large pressure vessels to automatically open and quickly release the pressure in the vessel after an overpressure accident. To verify the reliability of the valve's moving parts, reliability tests of valve operation under alternating hot and cold conditions are required to verify the valve's reliability in the working state. Conventional valve operation tests are usually conducted by electric or manual control, which cannot meet the testing requirements of this special valve. Therefore, a test device that meets the requirements of pressure differential-driven valves needs to be designed separately.

[0003] The opening of a valve driven by differential pressure is constrained by the upstream pressure and the size of the container, and is also closely related to the rate of increase of the upstream pressure. Conventional valve operation test and safety valve release test devices are difficult to meet the usage requirements of the designed valve. A test device that meets the cold and hot test requirements of this valve needs to be designed specifically for its operation characteristics. Summary of the Invention

[0004] In view of the above-mentioned problems in the prior art, the present invention provides a valve operation reliability testing device driven by differential pressure, so as to solve the technical problem that the existing testing devices cannot meet the reliability test of fast pressure relief valves driven by differential pressure.

[0005] This invention provides a pressure differential driven valve operation reliability testing device, comprising: a valve test circuit, a hot steam generator, and a compressed air device. The valve test circuit includes a volume compensation pipeline section, a third pressure gauge, a quick-opening valve, and the valve under test, which are sequentially connected in series along the airflow direction. The hot steam generator and the compressed air device are connected in parallel to the air inlet of the volume compensation pipeline section. A first isolation valve is provided between the hot steam generator and the volume compensation pipeline section, and a second isolation valve is provided between the compressed air device and the volume compensation pipeline section.

[0006] In one embodiment, the hot steam generating device includes a steam generator and a wet steam accumulator connected in series along the airflow direction.

[0007] In one embodiment, the compressed air device includes an air compressor and a high-pressure air tank connected in series along the airflow direction.

[0008] In one embodiment, the hot steam generating device further includes a first pressure gauge for measuring the internal pressure of the wet steam accumulator.

[0009] In one embodiment, the compressed air device further includes a second pressure gauge for measuring the internal pressure of the high-pressure air tank.

[0010] In one embodiment, the volume compensation pipeline section is provided with an external interface for connecting an external compensation container.

[0011] In one embodiment, the product of the operating pressure and effective volume of the hot steam generator is not less than 20 times the product of the operating pressure and effective volume of the valve test circuit.

[0012] In one embodiment, the product of the operating pressure and effective volume of the compressed air device is not less than 20 times the product of the operating pressure and effective volume of the valve test circuit.

[0013] In one embodiment, the design pressure of the first isolation valve and the second isolation valve is greater than 2 MPa.

[0014] In one embodiment, the quick-opening valve is designed to have a pressure greater than 2 MPa and a response time of no more than 2 seconds.

[0015] Compared with the prior art, the beneficial effects of the differential pressure driven valve operation reliability test device provided by the embodiments of the present invention are as follows: The embodiments of the present invention construct a differential pressure driven valve operation reliability test device by means of a valve test circuit, a hot steam generator and a compressed air device, which takes into account the requirements of hot and cold tests of valves. By integrating the hot steam generator and the compressed air device and using a shared valve test circuit design, the switching between cold and hot tests of valves is realized by using the on and off of the isolation valve, which effectively meets the reliability test requirements of valve moving parts. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a pressure differential-driven valve operation reliability testing device provided in an embodiment of the present invention.

[0017] Figure label:

[0018] 1. Steam generator; 2. Wet steam accumulator; 3. First pressure gauge; 4. First isolation valve; 5. Air compressor; 6. High-pressure air tank; 7. Second pressure gauge; 8. Second isolation valve; 9. Volume compensation pipeline section; 10. External compensation container; 11. Third pressure gauge; 12. Quick-opening valve; 13. Valve under test. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0021] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0022] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0023] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0024] Specific embodiments of this application are described below with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to ascertain the true intent based on the user's historical operations, and to avoid unnecessary or redundant details that would obscure this application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in various ways with substantially any suitable detailed structure.

[0025] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0026] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments described are for illustrative purposes only and are not intended to limit the scope of the invention. The following description, in conjunction with... Figure 1 The preferred embodiments of the present invention will be described in further detail below:

[0027] like Figure 1As shown, this embodiment of the invention provides a pressure differential driven valve operation reliability testing device, including: a valve test circuit, a hot steam generator, and a compressed air device. The valve test circuit includes a volume compensation pipeline section 9, a third pressure gauge 11, a quick-opening valve 12, and a valve under test 13, which are connected in series along the airflow direction. The hot steam generator and the compressed air device are connected in parallel to the air inlet of the volume compensation pipeline section 9. A first isolation valve 4 is provided between the hot steam generator and the volume compensation pipeline section 9, and a second isolation valve 8 is provided between the compressed air device and the volume compensation pipeline section 9. The hot steam generator and the compressed air device can be switched by opening and closing the isolation valves to achieve the switching of different test states, respectively providing high-pressure steam or high-pressure compressed air to the valve test circuit to meet the requirements.

[0028] Among them, the valve under test 13 is replaced with the matching tooling for cold and hot tests by bolt connection at the end of its valve body, which is used to provide a sealed experimental boundary for the downstream of the valve during the test. A measuring device for measuring the stroke of the valve's moving parts is installed inside the valve.

[0029] In one embodiment, the hot steam generating device includes a steam generator 1 and a wet steam accumulator 2 connected in series along the airflow direction. The valve test circuit can use the high-pressure water flash evaporation in the wet steam accumulator 2 to quickly provide a steam source to the valve test circuit to meet the hot test requirements. The steam generator 1 continuously replenishes the wet steam accumulator 2 with high-pressure steam to meet the needs of the test device for large-scale and multiple operations.

[0030] In one embodiment, the compressed air device includes an air compressor 5 and a high-pressure air tank 6 connected in series along the airflow direction. The valve test circuit can use the high-pressure air in the large high-pressure air tank 6 to conduct a large number of cold tests, while the air compressor 5 can replenish the high-pressure air in the high-pressure air tank 6 at any time, ensuring the long-term operation of the test device.

[0031] In one embodiment, the hot steam generating device further includes a first pressure gauge 3 for measuring the internal pressure of the wet steam accumulator 2. The internal pressure parameters of the wet steam accumulator 2 can be obtained in real time through the separately set first pressure gauge 3. When the pressure drops, the steam generator 1 is used to replenish high-pressure steam to the wet steam accumulator 2 in a timely manner to ensure that the internal pressure of the wet steam accumulator 2 meets the test requirements.

[0032] In one embodiment, the compressed air device further includes a second pressure gauge 7 for measuring the internal pressure of the high-pressure air tank 6. The internal pressure parameters of the high-pressure air tank 6 can be obtained in real time through the separately set second pressure gauge 7. When the pressure drops, the air compressor 5 is used to replenish the high-pressure air tank 6 with high-pressure steam in a timely manner to ensure that the internal pressure of the high-pressure air tank 6 meets the test requirements.

[0033] In one embodiment, the volume compensation pipeline section 9 is a DN800 pipe, and its pipe body has a reserved external interface for connecting an external compensation container 10 to meet the test requirements of the valve under test 13 for different upstream free volumes. The volume compensation pipeline section 9 can adjust the pressure of steam / air in the compensation pipeline section during the test according to the pressure and flow rate released by the valve under test 13 in the actual use scenario, or increase the upstream volume of the valve under test 13 by connecting an external compensation container 10 to meet the test requirements.

[0034] In one embodiment, the product of the operating pressure and effective volume of the hot steam generator is not less than 20 times the product of the operating pressure and effective volume of the valve test circuit, so as to ensure that a sufficient gas source can be provided for the hot test.

[0035] In one embodiment, the product of the operating pressure and effective volume of the compressed air device is not less than 20 times the product of the operating pressure and effective volume of the valve test circuit, so as to ensure that a sufficient air source can be provided for the cold test.

[0036] In one embodiment, the design pressure of the first isolation valve 4 and the second isolation valve 8 is greater than 2 MPa to ensure that the isolation valves can perform their isolation function normally under pressure.

[0037] In one embodiment, the quick-opening valve 12 is designed to have a pressure greater than 2 MPa and a response time of no more than 2 seconds. After the test requirements are met upstream, the quick-opening valve 12 provides the valve under test 13 with test conditions that meet the test requirements through rapid pressure increase.

[0038] This invention also provides a testing method for use with the above-mentioned testing apparatus, comprising the following steps:

[0039] Step 1: Based on the opening pressure of the valve 13 under test and the upstream volume required for actual operation, determine the operating pressure, specifications, and length of the volume compensation pipeline section 9. When the upstream volume of the valve required for the test is large, the test section volume can be further increased by connecting an external supplementary container 10 to the volume compensation pipeline section 9.

[0040] Step 2: For the high-pressure air storage tank 6 of compressed air, in order to ensure that it can provide a sufficient air source for the cold test, it is recommended that the product of its operating pressure P-air and the effective volume V-air of the high-pressure air storage tank 6 (P-air*V-air) can meet the product of the pressure and volume of the pipeline section 9 (if there is an external compensation container 10 connected, the volume of the external compensation container 10 should also be taken into account) by not less than 20 times, i.e., P-air*V-air≥20P-t*Vt.

[0041] Step 3: After the test equipment is set up, pressure tests and cold and hot state adjustments are carried out on the valve test circuit to verify that the system status meets the test requirements.

[0042] Step 4: Before the test begins, use air compressor 5 to pressurize the high-pressure compressed air storage tank 6 to the operating pressure and bring it to standby status.

[0043] Step 5: During the hot test, close the isolation valves of the cold and hot device sections and the quick-opening valve 12 of the test circuit. Use the boiler (steam generator 1) to heat and pressurize the wet steam accumulator 2 to the operating pressure and then stop the boiler. Slowly open the first isolation valve 4 to fill the valve test circuit volume compensation pipeline section 9 with saturated steam to the preset test state. Close the first isolation valve 4 corresponding to the hot device to meet the conditions for carrying out the hot test.

[0044] Step 6: During the cold test, close the isolation valves of the cold and hot device sections and the quick-opening valve 12 of the valve test circuit. Slowly open the second isolation valve 8 corresponding to the cold device to fill the valve test circuit volume compensation pipeline section 9 with compressed air to the required state for the test. Close the second isolation valve 8 corresponding to the cold device to meet the conditions for carrying out the cold test.

[0045] Step 7: During the cold and hot state tests, the cold and hot state tooling of the valve under test 13 and the stroke measuring device installed inside are used to verify whether the valve's action meets the requirements in each test. During the test, the change of pressure in front of the valve is observed by video monitoring, and the opening time of the valve driven by the pressure difference is recorded to complete the reliability test of the valve's action.

[0046] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A pressure differential-driven valve operation reliability testing device, characterized in that, include: The valve test circuit includes a hot steam generator and a compressed air device. The valve test circuit includes a volume compensation pipeline section (9), a third pressure gauge (11), a quick-opening valve (12), and a valve under test (13) arranged in series along the airflow direction. The hot steam generator and the compressed air device are connected to the air inlet of the volume compensation pipeline section (9) in parallel. A first isolation valve (4) is provided between the hot steam generator and the volume compensation pipeline section (9), and a second isolation valve (8) is provided between the compressed air device and the volume compensation pipeline section (9).

2. The pressure differential driven valve operation reliability testing device according to claim 1, characterized in that: The hot steam generating device includes a steam generator (1) and a wet steam accumulator (2) connected in series along the airflow direction.

3. The pressure differential driven valve operation reliability testing device according to claim 1, characterized in that: The compressed air device includes an air compressor (5) and a high-pressure air tank (6) connected in series along the airflow direction.

4. The pressure differential driven valve operation reliability testing device according to claim 2, characterized in that: The hot steam generating device also includes a first pressure gauge (3) for measuring the internal pressure of the wet steam accumulator (2).

5. The pressure differential driven valve operation reliability testing device according to claim 3, characterized in that: The compressed air device also includes a second pressure gauge (7) for measuring the internal pressure of the high-pressure air tank (6).

6. The pressure differential driven valve operation reliability testing device according to claim 1, characterized in that: The volume compensation pipeline section (9) has an external interface reserved for connecting an external compensation container (10).

7. The pressure differential driven valve operation reliability testing device according to claim 4, characterized in that: The product of the operating pressure and effective volume of the hot steam generator shall not be less than 20 times the product of the operating pressure and effective volume of the valve test circuit.

8. The pressure differential driven valve operation reliability testing device according to claim 5, characterized in that: The product of the operating pressure and effective volume of the compressed air device shall not be less than 20 times the product of the operating pressure and effective volume of the valve test circuit.

9. The pressure differential driven valve operation reliability testing device according to claim 1, characterized in that: The design pressure of the first isolation valve (4) and the second isolation valve (8) is greater than 2 MPa.

10. The pressure differential driven valve operation reliability testing device according to claim 1, characterized in that: The quick-opening valve (12) is designed to have a pressure greater than 2 MPa and a reaction time of no more than 2 seconds.

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