WO2023115841A1 - Constant-pressure experiment based device and method for measuring valve leakage of pressure balance valve - Google Patents
Constant-pressure experiment based device and method for measuring valve leakage of pressure balance valve Download PDFInfo
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- WO2023115841A1 WO2023115841A1 PCT/CN2022/098350 CN2022098350W WO2023115841A1 WO 2023115841 A1 WO2023115841 A1 WO 2023115841A1 CN 2022098350 W CN2022098350 W CN 2022098350W WO 2023115841 A1 WO2023115841 A1 WO 2023115841A1
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- mass block
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- storage tank
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
Definitions
- the invention relates to the technical field of valves, in particular to a pressure balance valve leakage detection device and method based on a constant pressure experiment.
- a valve is a device used in a fluid system to control the direction, pressure, and flow of fluid. Its function is to make the medium in the pipeline or equipment flow or stop and control its flow.
- the sealing performance of the valve refers to the ability of each sealing part of the valve to prevent the leakage of the medium, and is one of the most important technical performance indicators of the valve. In recent years, valve leakage accidents have occurred frequently, causing great losses. Valve leakage has become one of the main sources of leakage in fluid systems, especially for gas systems, and the country has stipulated its leakage level for valve leakage. Its use specifications need to meet the corresponding standards.
- the traditional gas leakage measurement method is usually to install a mass flowmeter on the leakage side of the seal, such as a thermal mass flowmeter and a Coriolis mass flowmeter to measure the leakage, but this method is only suitable for large leakage Occasionally, when the amount of leakage is small, this method is no longer applicable, and the accuracy cannot meet the requirements. And most of them use the differential pressure measurement method, which uses the pressure difference between a reference object and the measured object to obtain the actual leakage, but this kind of pressure measurement device itself has a certain measurement error, resulting in low accuracy. high. Another method is to collect the leaked gas through a certain cavity to obtain the leakage amount, but the volume of the cavity is not easy to measure.
- the idea of constant pressure is used to unify the control system and the pressure device.
- the gas supply device inflates the cavity through the transmitted pressure signal to make it reach the previous pressure.
- the amount of leakage is obtained after a certain period of time, but this method has certain limitations. Its whole system is relatively large, and there are many designed parts, and the cumulative error is relatively large. At the same time, there is a certain error in the inflation process, so it is not suitable for the occasion of micro leakage.
- the technical problem to be solved by the present invention is to provide a pressure balance valve leakage detection device and method based on a constant pressure experiment in view of the deficiencies of the prior art.
- the surface groove of the mass block (10) is connected with the mass block working pipeline (9) using a COP sealing ring (10)-(2); Silicone oil (10)-(3) is injected into the groove formed by the middle surface of the mass block (10) and the mass block working pipe (9).
- the pressure balance valve leakage detection device based on the constant pressure experiment further includes a guide post (11), which is combined with the mass block (10) to provide guidance for the movement of the mass block.
- a pressure gauge (14) is installed on the gas delivery pipeline (12); a pressure gauge (18) is installed on the tank body of the gas storage tank (2).
- a pulley block mechanism is connected to the lower part of the mass block (10).
- the weight of the mass block (8-6) is amplified and applied to the mass block (10) to reduce the weight of the mass block (10).
- the two ends of the first rope are respectively connected to the lower part of the mass block (10), and the first rope is folded in half to form two strands Rope, the two strands of rope go around the fixed pulley (8-1) and the fixed pulley (8-2) fixed on the bottom of the mass block (10) respectively, and apply downward pressure to the mass block (10).
- a gas delivery pipeline (12) is added between the gas storage tank (2) and the mass block working pipeline (9) 12)
- the supercharging mechanism (5) utilizes two pistons with different cross-sectional areas to achieve different pressures on both sides of the piston, so that the area of the piston near the mass block (10) is greater than The area of the piston near the side of the gas storage tank (2); when the standard pressure of the test is relatively high, close the stop valve (13), open the stop valve (3) and the stop valve (7), and make the pressurization mechanism (5) start to work , the larger pressure in the gas storage tank on the left side of the piston in the supercharging mechanism (5) is converted into the smaller pressure on the right side of the piston.
- valve leakage measuring method when the standard pressure of the test is high, the booster mechanism (5) is started to work, and the pressure in the gas storage tank on the left side of the piston in the booster mechanism (5) is converted to the pressure on the right side of the piston. Smaller pressure, can measure the leakage of the valve of bigger test pressure like this without changing big mass block (10).
- the present invention proposes a pressure balance valve internal leakage detection device and method based on a constant pressure experiment.
- the small leakage of the valve is converted into the displacement change of the mass block, and then Realize the detection of small leakage of the valve under high precision.
- the leakage of the valve under different standard measurement pressures can be measured, and the mass block can be further reduced It has its own weight, and solves the detection problem of small leakage in the valve, solves the problem of low leakage measurement accuracy, and has a wide range of applications.
- Figure 1 is a schematic diagram of a pressure balance valve leakage detection device based on a constant pressure experiment:
- Figure 2 is a schematic diagram of the position of the pulley block in the leakage detection device of the pressure balance valve
- Figure 3 is a schematic diagram of the mass block moving and sealing in the pipeline:
- a pressure balance valve leakage detection device based on a constant pressure experiment comprising a tested valve 1 , a gas storage tank 2 , a mass block working pipeline 9 , a mass block 10 , a shut-off valve 15 , and a gas compressor 16 .
- the gas flow inlet of the tested valve 1 is connected with the gas flow outlet of the gas delivery pipeline 19 with a flange, and fixed with bolts.
- the gas flow outlet of the gas storage tank 2 is connected with the gas flow inlet of the gas delivery pipeline 19 using a flange, and fixed with bolts.
- the stop valve 15 is installed with a flange between the gas compressor 16 and the gas delivery pipeline 17, and is fixed with bolts.
- Another air outlet of the gas storage tank 2 is connected to the air inlet of the gas delivery pipeline 12 with a flange, and fixed with bolts, and the air outlet of the gas delivery pipeline 12 is connected to the working pipeline 9 of the mass block.
- the pressure gauge 14 is installed on the gas delivery pipeline 12 and is threaded.
- the gas flow outlet of the gas compressor 16 is connected with the gas flow inlet of the gas delivery pipeline 17 .
- the gas flow outlet of the gas delivery pipeline 17 is connected with the gas flow inlet of the gas storage tank 2 with a flange, and fixed with bolts.
- the pressure gauge 18 is installed on the gas storage tank 2 tank body and is threaded.
- a COP sealing ring 10-2 is used to connect the surface groove of the mass block 10 and the mass block working pipeline 9. Silicone oil 10-3 is injected into the groove formed by the middle surface of the mass block 10 and the working pipe 9 of the mass block. It also includes a guide post 11, which is combined with the mass block 10 to provide guidance for the movement of the mass block.
- the principle of the measurement method of the pressure balance valve leakage detection device is that the gas compressor 16 provides gas to the gas storage tank 2.
- the gas pressure needs to reach the standard test pressure when measuring the leakage. , so when there is more and more gas in the gas tank 2, the pressure in the gas tank 2 is also increasing until the indications on the pressure gauge 14 and the pressure gauge 18 are just in time to the required standard pressure for the test, Stop the air supply, and record the position of the mass block 10 at this time with a measuring ruler, denoted as h1.
- h1 a measuring ruler
- the gravity of the mass block 10 itself is greater than the pressure of the gas acting on the surface of the mass block 10, and the mass block 10 drops due to its own gravity, causing the entire cavity to The volume of the body decreases, and the pressure of the gas storage tank 2 increases slowly until reaching an equilibrium position again.
- the pressure in the gas storage tank 2 is continuously reduced, the mass block 10 is continuously lowered, and the whole system is constantly reaching a new balance.
- the position of the mass block 10 at this time is recorded with a measuring ruler, which is denoted as h2.
- the surface friction force on the mass block 10 can be regarded as a constant value, and the friction The force is negligible compared to the weight of the mass 10 itself. Therefore, the pressure in the entire cavity also remains constant, that is, constant pressure, which can keep the tested valve 1 under the standard pressure all the time, thereby improving the measurement accuracy.
- the COP seal ring 10-2 is used for sealing between the mass block 10 and the mass block working pipeline 9.
- the COP seal ring has the characteristics of small starting resistance, small friction force and strong sealing ability.
- the present invention further adds a pulley block mechanism at the upper end of the mass block 10 .
- the number of strands of the rope can be changed through the labor-saving nature of the pulley block 8 itself, thereby changing the pressure at the left and right ends, and the weight of the mass block itself can be prevented from being too large through an appropriate number of strands of rope, which is convenient for detection.
- the two ends of the first rope are respectively connected to the lower part of the mass block 10. After the first rope is folded in half, two strands of rope are formed.
- the fixed pulley 8-1 and the fixed pulley 8-2 exert downward pressure on the mass block 10, and the two ropes are symmetrical with the axis of the mass block 10 as the central axis.
- the middle part of these two strands of rope walks around movable pulley 8-3, and after movable pulley 8-3 is fixed with the second rope, this second rope passes fixed pulley 8-4 and is fixedly connected with pulley block 8-5 lower end.
- the upper end of block pulley 8-5 is combined with small mass block 8-6 and is connected with rope.
- the present invention adds a booster mechanism 5 parallel to the gas delivery pipeline 12 on the gas delivery pipeline 12 pipeline between the gas storage tank 2 and the mass block working pipeline 9, that is, the two ends of the booster mechanism and the original gas Conveying pipeline 12 is arranged side by side, on the gas conveying pipeline 12 of the two ends of supercharging mechanism 5, set up shut-off valve 13, increase shut-off valve 3 and 7 on the pipeline at the two ends of supercharging mechanism 5 simultaneously, conveniently realize supercharging mechanism 5 can according to It is necessary to realize the supercharging function and exit the supercharging function.
- the supercharging mechanism 5 uses two pistons with different cross-sectional areas to achieve different pressures on both sides of the piston, so that the area A2 of the piston close to the side of the mass block 10 is larger, and the area A2 of the side close to the gas storage tank 2 is larger.
- the piston area A1 is smaller.
- the specific calculation is as follows:
- the implementation points of the assembly method are as follows:
- the gas flow inlet of the tested valve 1 is connected with the gas flow outlet of the gas delivery pipeline 19 with a flange, and fixed with bolts.
- the shut-off valve 3 is installed with a flange between the gas delivery pipeline 12 and the gas delivery pipeline 4, and is fixed with bolts.
- the pressure boosting mechanism 5 is installed with a flange between the gas delivery pipeline 4 and the gas delivery pipeline 6, and is fixed with bolts.
- the gas flow outlet of the gas storage tank 2 is connected with the gas flow inlet of the gas delivery pipeline 19 using a flange, and fixed with bolts.
- the shut-off valve 7 is installed with a flange between the gas delivery pipeline 12 and the gas delivery pipeline 6, and is fixed with bolts.
- the shut-off valve 13 is installed between the gas delivery pipelines 12 with a flange, and is fixed with bolts.
- the stop valve 15 is installed with a flange between the gas compressor 16 and the gas delivery pipeline 17, and is fixed with bolts.
- the other air outlet of the gas storage tank 2 is connected with the air inlet of the gas delivery pipeline 12 with a flange, and fixed with bolts.
- the pressure gauge 14 is installed on the gas delivery pipeline 12 and is threaded.
- the gas flow outlet of the gas compressor 16 is connected with the gas flow inlet of the gas delivery pipeline 16 .
- the gas flow outlet of the gas delivery pipeline 17 is connected with the gas flow inlet of the gas storage tank 2 with a flange, and fixed with bolts 4 .
- the pressure gauge 18 is installed on the gas storage tank 2 tank body and is threaded.
- a COP sealing ring 10-2 is used to connect the surface groove of the mass block 10 and the mass block working pipeline 9. Silicone oil 10-3 is injected into the groove formed by the middle surface of the mass block 10 and the working pipe 9 of the mass block. The guide column 11 is combined with the mass block 10 .
- test method of the pressure balance valve leakage detection and measurement device realized according to the above assembly method is as follows:
- the gas compressor 16 provides gas in the gas storage tank 2.
- the gas pressure needs to reach the standard test pressure when measuring the leakage, so when there is more and more gas in the gas storage tank 2, the gas storage tank 2
- the pressure in the gas tank 2 is also increasing, until the indications on the pressure gauge 14 and the pressure gauge 18 are just in time when the required standard pressure of the test, stop the gas supply.
- the surface friction force on the mass block 10 can be regarded as a constant value, and the friction The force is negligible compared to the weight of the mass 10 itself. Therefore, the pressure in the entire cavity also remains constant, that is, constant pressure, which can keep the tested valve 1 under the standard pressure all the time, thereby improving the measurement accuracy.
- the COP sealing ring 10-2 is used for sealing between the mass block 10 and the mass block working pipeline 9.
- the COP sealing ring has the characteristics of small starting resistance, small friction force and strong sealing ability.
- the gap between the mass block 10-1 Adding silicone oil 10-3, the liquid has a stronger seal to the gas, which increases the airtightness of the entire sealing device and improves the measurement accuracy of the entire device.
- a guiding column 11 is installed in order to improve the guiding precision of the mass block 10.
- a pulley block mechanism is added at the upper end of the mass block 10, and a booster mechanism 5 is added in front of the pipeline.
- the number of rope strands can be changed by the labor-saving nature of the pulley block 8 itself, and then the pressure at the left and right ends can be changed. With an appropriate number of rope strands, the weight of the mass block itself can be prevented from being too large, which is convenient for detection.
- the booster mechanism 5 can also reduce the pressure and thereby reduce the weight of the mass block 10 itself, thereby meeting the requirements of the test pressure.
- the pulley block 8 can be made into different numbers of rope strands according to the standard measurement pressure of the different tested valves 1, which is applicable to occasions where the standard pressure is tested for different leaks.
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Abstract
A constant-pressure experiment based device and method for measuring a valve leakage of a pressure balance valve. The device comprises a valve to be subjected to measurement (1), a gas storage tank (2), a mass block working pipeline (9), a mass block (10), a stop valve (15) and a gas compressor (16), wherein a gas flow inlet of the valve to be subjected to measurement (1) is connected to the gas storage tank (2) by means of a gas conveying pipeline (19); the gas compressor (16) is connected to the gas storage tank (2) by means of the gas conveying pipeline (19); the other gas flow outlet of the gas storage tank (2) is connected to a gas flow inlet of the gas conveying pipeline (19) and is fixed by means of bolts; a gas flow outlet of the gas conveying pipeline (19) is connected to the mass block working pipeline (9); the mass block (10) is in gastight connection with the mass block working pipeline (9); and the mass block (10) can freely move in the mass block working pipeline (9) according to the magnitude of gas pressure in the mass block working pipeline (9). Leakages of a valve under different standard measurement pressures can be measured; the weight of the mass block (10) can be further reduced; a measurement problem occurring when there is a micro leakage in the valve is solved, thereby solving the problem of low precision of leakage measurement; and the application range is wide.
Description
本发明涉及阀门技术领域，尤其涉及的是一种基于恒压实验的压力平衡阀阀泄漏量检测装置及方法。The invention relates to the technical field of valves, in particular to a pressure balance valve leakage detection device and method based on a constant pressure experiment.
在日常的生活环境以及工程实际中存在着各种各样的泄漏，有些泄漏造成的影响较轻，比如造成物料的浪费；但有些泄漏却相当严重，比如一些易燃易爆和有毒物质的泄漏会危害到人身安全。此外，由于漏孔的存在，空气，水分和粉尘等很容易进入设备，污染工作介质，影响产品的质量，并降低机器的寿命。There are various leakages in the daily living environment and engineering practice. Some leakages have less impact, such as waste of materials; but some leakages are quite serious, such as the leakage of some flammable, explosive and toxic substances. It will endanger personal safety. In addition, due to the existence of leakage holes, air, moisture and dust can easily enter the equipment, pollute the working medium, affect the quality of the product, and reduce the life of the machine.
阀门是在流体***中用来控制流体方向、压力、流量的装置。其作用是使管道或设备内的介质流动或停止并能控制其流量。阀门的密封性能是指阀门各密封部位阻止介质泄漏的能力，是阀门最重要的技术性能指标之一。近年来，阀门泄露事故频频发生，造成了很大的损失，阀门泄露已经成为流体***中主要的泄露源之一，尤其对于气体***而言，并且针对阀门泄漏量国家已经规定了其泄露等级，其使用规范需要达到相对应的标准，如果使用泄漏量不在规定标准之内的产品，不仅会影响产品的性能，在严重的情况下产生不可预估的后果，如会导致火灾，***和有害气体泄漏等。因此需要对其进行泄漏量检测，判断其泄漏量是否达到国家规定使用的标准等级。A valve is a device used in a fluid system to control the direction, pressure, and flow of fluid. Its function is to make the medium in the pipeline or equipment flow or stop and control its flow. The sealing performance of the valve refers to the ability of each sealing part of the valve to prevent the leakage of the medium, and is one of the most important technical performance indicators of the valve. In recent years, valve leakage accidents have occurred frequently, causing great losses. Valve leakage has become one of the main sources of leakage in fluid systems, especially for gas systems, and the country has stipulated its leakage level for valve leakage. Its use specifications need to meet the corresponding standards. If you use products whose leakage is not within the specified standards, it will not only affect the performance of the product, but in severe cases, unpredictable consequences will occur, such as fire, explosion and harmful gas. leaks etc. Therefore, it is necessary to carry out leakage detection to determine whether the leakage has reached the standard level stipulated by the state.
传统的气体泄漏量测量方法通常是在密封件泄漏侧安装质量流量计，比如热式质量流量计和科氏力质量流量计等进行泄漏量测量，但这种方法仅适用于泄漏量较大的场合，当泄露量较小时，此种方法不再适用，精度达不到要求。并且大多使用的是差压测量方法，利用一个基准物与被测物之间的压力差值得到实际的泄漏量，但是这种通过测量压力的装置本身就有一定的测量误差，导致精度不是很高。另一种方法是通过一定的 腔体来收集泄露出来的气体，进而得到泄漏量，但是腔体体积不好测量。某些测量方法中，利用恒压的思想，将控制***与压力装置统一起来，当腔体内压力下降时，供气装置通过传来的压力信号进而向腔体内充气，使之达到之前的压力，最后经过一定时间得到泄漏量，但是这种方法有一定的局限性。它的整个***较为庞大，设计到的部件较多，累积误差较大，同时充气过程有一定的误差，不太适用于微量泄露的场合。The traditional gas leakage measurement method is usually to install a mass flowmeter on the leakage side of the seal, such as a thermal mass flowmeter and a Coriolis mass flowmeter to measure the leakage, but this method is only suitable for large leakage Occasionally, when the amount of leakage is small, this method is no longer applicable, and the accuracy cannot meet the requirements. And most of them use the differential pressure measurement method, which uses the pressure difference between a reference object and the measured object to obtain the actual leakage, but this kind of pressure measurement device itself has a certain measurement error, resulting in low accuracy. high. Another method is to collect the leaked gas through a certain cavity to obtain the leakage amount, but the volume of the cavity is not easy to measure. In some measurement methods, the idea of constant pressure is used to unify the control system and the pressure device. When the pressure in the cavity drops, the gas supply device inflates the cavity through the transmitted pressure signal to make it reach the previous pressure. Finally, the amount of leakage is obtained after a certain period of time, but this method has certain limitations. Its whole system is relatively large, and there are many designed parts, and the cumulative error is relatively large. At the same time, there is a certain error in the inflation process, so it is not suitable for the occasion of micro leakage.
发明内容Contents of the invention
本发明所要解决的技术问题是针对现有技术的不足提供一种基于恒压实验的压力平衡阀阀泄漏量检测装置及方法。The technical problem to be solved by the present invention is to provide a pressure balance valve leakage detection device and method based on a constant pressure experiment in view of the deficiencies of the prior art.
本发明的技术方案如下：Technical scheme of the present invention is as follows:
一种基于恒压实验的压力平衡阀阀泄漏量检测装置，包括被测阀(1)、储气罐(2)、质量块工作管道(9)、质量块(10)、截止阀(15)、气体压缩机(16)；被测阀(1)的气流入口与储气罐(2)通过气体输送管道连接；气体压缩机(16)与储气罐(2)通过气体输送管道连接；储气罐(2)的另一个气流出口与气体输送管道(12)的气流入口连接，并用螺栓固定，气体输送管道(12)的气流出口连接到质量块工作管道(9)，质量块(10)与质量块工作管道(9)之间气密连接，质量块(10)可以根据质量块工作管道(9)中的气体压力大小在质量块工作管道(9)中***；待测阀的泄漏量通过质量块(10)在时间t内的位移Δh＝h
1-h
2进行计算得到。
A pressure balance valve leakage detection device based on a constant pressure experiment, comprising a tested valve (1), a gas storage tank (2), a mass block working pipeline (9), a mass block (10), and a stop valve (15) , gas compressor (16); the gas flow inlet of the measured valve (1) is connected with the gas storage tank (2) through a gas delivery pipeline; the gas compressor (16) is connected with the gas storage tank (2) through a gas delivery pipeline; Another airflow outlet of the gas tank (2) is connected with the airflow inlet of the gas delivery pipeline (12), and is fixed with bolts, and the airflow outlet of the gas delivery pipeline (12) is connected to the mass block working pipeline (9), and the mass block (10) Air-tight connection with the mass block working pipeline (9), the mass block (10) can move freely in the mass block working pipeline (9) according to the gas pressure in the mass block working pipeline (9); the leakage of the valve to be tested The amount is calculated by the displacement Δh=h 1 −h 2 of the mass block (10) within time t.
所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，质量块(10)的表面凹槽与质量块工作管道(9)之间使用COP密封圈(10)-(2)进行连接；硅油(10)-(3)注入到质量块(10)中间表面与质量块工作管道(9)形成的凹槽中。In the pressure balance valve leakage detection device based on the constant pressure experiment, the surface groove of the mass block (10) is connected with the mass block working pipeline (9) using a COP sealing ring (10)-(2); Silicone oil (10)-(3) is injected into the groove formed by the middle surface of the mass block (10) and the mass block working pipe (9).
所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，还包括导向柱(11)，导向柱(11)与质量块(10)组合连接，为质量块的运动提供导向作用。The pressure balance valve leakage detection device based on the constant pressure experiment further includes a guide post (11), which is combined with the mass block (10) to provide guidance for the movement of the mass block.
所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，气体输送管道(12)上安装有压力表(14)；储气罐(2)罐体上安装压力表(18)。In the pressure balance valve leakage detection device based on a constant pressure experiment, a pressure gauge (14) is installed on the gas delivery pipeline (12); a pressure gauge (18) is installed on the tank body of the gas storage tank (2).
所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，在质量块(10)的下部连 接有滑轮组机构，滑轮组中包括小质量块(8-6)，通过滑轮组力的放大作用将小质量块(8-6)的重量放大后施加在质量块(10)，以减轻质量块(10)的重量。In the pressure balance valve leakage detection device based on constant pressure experiment, a pulley block mechanism is connected to the lower part of the mass block (10). The weight of the mass block (8-6) is amplified and applied to the mass block (10) to reduce the weight of the mass block (10).
所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，所述滑轮组机构中，第一根绳子的两端分别与质量块(10)的下部连接，第一根绳子对折以后形成两股绳子，该两股绳子分别绕过固定在质量块(10)的下部的定滑轮(8-1)和定滑轮(8-2)，对质量块(10)施加向下的压力，两根绳子以质量块(10)的轴线为中轴对称；该两股绳子的中部绕过动滑轮(8-3)，动滑轮(8-3)与第二根绳子固定以后，该第二根绳子穿过定滑轮(8-4)后与滑轮组(8-5)下端固定连接；滑轮组(8-5)上端与小质量块(8-6)用绳子组合连接。In the pressure balance valve leakage detection device based on a constant pressure experiment, in the pulley block mechanism, the two ends of the first rope are respectively connected to the lower part of the mass block (10), and the first rope is folded in half to form two strands Rope, the two strands of rope go around the fixed pulley (8-1) and the fixed pulley (8-2) fixed on the bottom of the mass block (10) respectively, and apply downward pressure to the mass block (10). Take the axis of the mass block (10) as the axis symmetry; the middle part of the two strands of ropes walks around the movable pulley (8-3), and after the movable pulley (8-3) is fixed with the second rope, the second rope passes through the fixed Pulley (8-4) is fixedly connected with pulley block (8-5) lower end behind; Pulley block (8-5) upper end is connected with small mass (8-6) with rope combination.
所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，在储气罐(2)和质量块工作管道(9)之间的气体输送管道(12)管道上添加一个和气体输送管道(12)平行并列的增压机构(5)，即增压机构的两端和原始的气体输送管道(12)并列设置，在增压机构(5)的两端的气体输送管道(12)上增设截止阀(13)，同时在增压机构(5)的两端的管道上增加截止阀(3)与截止阀(7)，增压机构(5)能够根据需要实现增压功能和退出增压功能。In the pressure balance valve leakage detection device based on constant pressure experiments, a gas delivery pipeline (12) is added between the gas storage tank (2) and the mass block working pipeline (9) 12) The supercharging mechanism (5) parallel and parallel, that is, the two ends of the supercharging mechanism and the original gas delivery pipeline (12) are arranged side by side, and a cut-off is added on the gas delivery pipeline (12) at the two ends of the supercharging mechanism (5). Valve (13), increase cut-off valve (3) and cut-off valve (7) on the pipeline at both ends of supercharging mechanism (5) simultaneously, supercharging mechanism (5) can realize supercharging function and exit supercharging function as required.
所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，增压机构(5)利用两个截面积不同的活塞达到活塞两边的压力不同，使靠近质量块(10)一边的活塞面积大于靠近储气罐(2)一边的活塞面积；当测试的标准压力较大时，关闭截止阀(13)，打开截止阀(3)与截止阀(7)，使增压机构(5)开始工作，将增压机构(5)中活塞左边储气罐里面较大的压力转换为活塞右边较小的压力。In the pressure balance valve leakage detection device based on the constant pressure experiment, the supercharging mechanism (5) utilizes two pistons with different cross-sectional areas to achieve different pressures on both sides of the piston, so that the area of the piston near the mass block (10) is greater than The area of the piston near the side of the gas storage tank (2); when the standard pressure of the test is relatively high, close the stop valve (13), open the stop valve (3) and the stop valve (7), and make the pressurization mechanism (5) start to work , the larger pressure in the gas storage tank on the left side of the piston in the supercharging mechanism (5) is converted into the smaller pressure on the right side of the piston.
根据任一所述装置的阀泄漏量测量方法，气体压缩机(16)向储气罐(2)中提供气体，将储气罐(2)中的压力提高到的标准压力，停止供气，利用测量尺记录此时质量块(10)位置，记作h1；当被测阀(1)有微量泄露时，储气罐(2)中的压力减小，此时质量块(10)自身的重力大于气体作用在质量块(10)表面的压力，质量块(10)因自身重力下降；随着被测阀(1)的不断泄露，储气罐(2)中的压力不断减小，质量块(10)不断下降，整个***又不断达到新的平衡；直到经过测量时间t后，利用测量 尺记录此时质量块(10)位置，记作h2；待测阀的泄漏量通过质量块(10)在时间t内的位移Δh＝h
1-h
2进行计算得到。
According to the valve leakage measurement method of any one of the devices, the gas compressor (16) provides gas in the gas storage tank (2), the pressure in the gas storage tank (2) is increased to the standard pressure, and the gas supply is stopped. Utilize the measuring ruler to record the position of the mass block (10) at this time, and denote it as h1; when the valve under test (1) leaks slightly, the pressure in the gas storage tank (2) decreases, and at this moment, the mass block (10) itself The gravity is greater than the pressure of the gas acting on the surface of the mass block (10), and the mass block (10) drops due to its own gravity; with the continuous leakage of the tested valve (1), the pressure in the gas storage tank (2) decreases continuously, and the mass The block (10) keeps falling, and the whole system reaches a new balance; until the measuring time t passes, use the measuring ruler to record the position of the mass block (10) at this time, which is recorded as h2; the leakage of the valve to be tested passes through the mass block ( 10) Calculate the displacement Δh=h 1 -h 2 within the time t.
所述的阀泄漏量测量方法，当测试的标准压力较大时，使增压机构(5)开始工作，将增压机构(5)中活塞左边储气罐里面较大的压力转换为活塞右边较小的压力，这样不用更换大的质量块(10)就可以测出较大测试压力的阀的泄漏量。In the valve leakage measuring method described above, when the standard pressure of the test is high, the booster mechanism (5) is started to work, and the pressure in the gas storage tank on the left side of the piston in the booster mechanism (5) is converted to the pressure on the right side of the piston. Smaller pressure, can measure the leakage of the valve of bigger test pressure like this without changing big mass block (10).
所述的阀泄漏量测量方法，当测试的标准压力较大时，通过滑轮组力的放大作用将小质量块(8-6)的重量放大后施加在质量块(10)上，以减轻质量块(10)的重量。In the valve leakage measurement method, when the test standard pressure is high, the weight of the small mass (8-6) is amplified and applied to the mass (10) through the amplification effect of the pulley block force, so as to reduce the weight of the mass (10). (10) WEIGHT.
本发明提出了一种基于恒压实验的压力平衡阀阀内泄漏量检测装置及方法，通过所发明的装置以及相应的设置与操作，将阀的微小泄漏量转化为质量块的位移变化，进而实现在较高精度下阀微小泄漏量的检测。在阀泄漏量检测工作的过程中，通过对滑轮组机构内不同滑轮组合数量改变不同的质量比，同时添加增压机构，可以测量不同标准测量压力下阀的泄漏量，并且可进一步减小质量块自身重量，且解决了阀内微量泄露时的检测问题，解决了泄漏量测量精度不高的问题，适应范围广。The present invention proposes a pressure balance valve internal leakage detection device and method based on a constant pressure experiment. Through the invented device and corresponding settings and operations, the small leakage of the valve is converted into the displacement change of the mass block, and then Realize the detection of small leakage of the valve under high precision. In the process of valve leakage detection, by changing the mass ratio of different pulley combinations in the pulley block mechanism and adding a booster mechanism, the leakage of the valve under different standard measurement pressures can be measured, and the mass block can be further reduced It has its own weight, and solves the detection problem of small leakage in the valve, solves the problem of low leakage measurement accuracy, and has a wide range of applications.
图1为基于恒压实验的压力平衡阀阀泄漏量检测装置原理图：Figure 1 is a schematic diagram of a pressure balance valve leakage detection device based on a constant pressure experiment:
图2为压力平衡阀阀泄漏量检测装置中滑轮组位置示意图Figure 2 is a schematic diagram of the position of the pulley block in the leakage detection device of the pressure balance valve
图3为质量块在管道中移动密封原理图：Figure 3 is a schematic diagram of the mass block moving and sealing in the pipeline:
1——被测阀，2——储气罐，3——截止阀，4——气体输送管道，5——增压机构，6——气体输送管道，7——截止阀，8——滑轮组，8-1——定滑轮，8-2——定滑轮，8-3——定滑轮，8-4——定滑轮，8-5——滑轮组，8-6——小质量块，9——质量块工作管道，10——质量块，10-2——硅油，10-3——COP密封圈，11——导向柱，12——气体输送管道，13——截止阀，14——压力表，15——截止阀，16——气体压缩机，17——气体输送管道，18——压力表，19——气体输送管道；1—Valve under test, 2—Gas storage tank, 3—Globe valve, 4—Gas delivery pipeline, 5—Purification mechanism, 6—Gas delivery pipeline, 7—Globe valve, 8— Pulley block, 8-1——fixed pulley, 8-2——fixed pulley, 8-3——fixed pulley, 8-4——fixed pulley, 8-5——pulley block, 8-6——small quality block, 9—mass block working pipeline, 10—mass block, 10-2—silicone oil, 10-3—COP sealing ring, 11—guiding column, 12—gas delivery pipeline, 13—globe valve, 14 ——Pressure gauge, 15—Globe valve, 16—Gas compressor, 17—Gas delivery pipeline, 18—Pressure gauge, 19—Gas delivery pipeline;
以下结合具体实施例，对本发明进行详细说明。The present invention will be described in detail below in conjunction with specific embodiments.
一种基于恒压实验的压力平衡阀阀泄露量检测装置，包括被测阀1、储气罐2、质量块工作管道9、质量块10、截止阀15、气体压缩机16。被测阀1的气流入口使用法兰与气体输送管道19的气流出口连接，并用螺栓固定。储气罐2的气流出口使用法兰与气体输送管道19的气流入口连接，并用螺栓固定。气体压缩机16与气体输送管道17之间用法兰安装截止阀15，并用螺栓固定。同时储气罐2的另一个气流出口使用法兰与气体输送管道12的气流入口连接，并用螺栓固定，气体输送管道12的气流出口连接到质量块工作管道9。压力表14安装在气体输送管道12上用螺纹连接。气体压缩机16的气流出口与气体输送管道17的气流入口连接。气体输送管道17的气流出口使用法兰与储气罐2的气流入口连接，并用螺栓固定。压力表18安装在储气罐2罐体上用螺纹连接。质量块10的表面凹槽与质量块工作管道9之间使用COP密封圈10-2进行连接。硅油10-3注入到质量块10中间表面与质量块工作管道9形成的凹槽中。还包括导向柱11，导向柱11与质量块10组合连接，为质量块的运动提供导向作用。A pressure balance valve leakage detection device based on a constant pressure experiment, comprising a tested valve 1 , a gas storage tank 2 , a mass block working pipeline 9 , a mass block 10 , a shut-off valve 15 , and a gas compressor 16 . The gas flow inlet of the tested valve 1 is connected with the gas flow outlet of the gas delivery pipeline 19 with a flange, and fixed with bolts. The gas flow outlet of the gas storage tank 2 is connected with the gas flow inlet of the gas delivery pipeline 19 using a flange, and fixed with bolts. The stop valve 15 is installed with a flange between the gas compressor 16 and the gas delivery pipeline 17, and is fixed with bolts. At the same time, another air outlet of the gas storage tank 2 is connected to the air inlet of the gas delivery pipeline 12 with a flange, and fixed with bolts, and the air outlet of the gas delivery pipeline 12 is connected to the working pipeline 9 of the mass block. The pressure gauge 14 is installed on the gas delivery pipeline 12 and is threaded. The gas flow outlet of the gas compressor 16 is connected with the gas flow inlet of the gas delivery pipeline 17 . The gas flow outlet of the gas delivery pipeline 17 is connected with the gas flow inlet of the gas storage tank 2 with a flange, and fixed with bolts. The pressure gauge 18 is installed on the gas storage tank 2 tank body and is threaded. A COP sealing ring 10-2 is used to connect the surface groove of the mass block 10 and the mass block working pipeline 9. Silicone oil 10-3 is injected into the groove formed by the middle surface of the mass block 10 and the working pipe 9 of the mass block. It also includes a guide post 11, which is combined with the mass block 10 to provide guidance for the movement of the mass block.
所述压力平衡阀泄漏量检测装置的测量方法，原理在于，气体压缩机16向储气罐2中提供气体，针对于某种测试阀而言，测量泄漏量时气体压力需要达到标准的测试压力，故当储气罐2中的气体越来越多时，储气罐2中的压力也越来越大，直到压力表14和压力表18上的示数正好是测试所需要的标准压力时，停止供气，利用测量尺记录此时质量块10位置，记作h1。当被测阀1有微量泄露时，储气罐2中的压力减小，此时质量块10自身的重力大于气体作用在质量块10表面的压力，质量块10因自身重力下降，导致整个腔体的体积减小，储气罐2的压力又慢慢增大，直到又达到一个平衡位置。随着被测阀1的不断泄露，储气罐2中的压力不断减小，质量块10不断下降，整个***又不断达到新的平衡。直到经过测量时间t后，利用测量尺记录此时质量块10位置，记作h2。在该***中，由于质量块10自身的质量不变，且被测阀1泄露过程可以看作是一个缓慢的过程，质量块10所受的表面摩擦力可看作是一个定值，且摩擦力相较于质量块10自身重力来说可以忽略。故整个腔体内的压力也保持不变，即为恒压，可以使被测阀1一直处于标准压力之下，提高了测量的精度。同时在对质量块10与质量块 工作管道9之间利用COP密封圈10-2进行密封，COP密封圈具有启动阻力小、摩擦力小与密封能力强等特点，同时质量块10之间添加硅油10-3，液体对气体的密封性较强，增加了整个密封装置的气密性，提高了整个装置的测量精度。同时为了提高质量块10的导向精度，安装导向柱11。The principle of the measurement method of the pressure balance valve leakage detection device is that the gas compressor 16 provides gas to the gas storage tank 2. For a certain test valve, the gas pressure needs to reach the standard test pressure when measuring the leakage. , so when there is more and more gas in the gas tank 2, the pressure in the gas tank 2 is also increasing until the indications on the pressure gauge 14 and the pressure gauge 18 are just in time to the required standard pressure for the test, Stop the air supply, and record the position of the mass block 10 at this time with a measuring ruler, denoted as h1. When the valve 1 under test leaks slightly, the pressure in the gas storage tank 2 decreases. At this time, the gravity of the mass block 10 itself is greater than the pressure of the gas acting on the surface of the mass block 10, and the mass block 10 drops due to its own gravity, causing the entire cavity to The volume of the body decreases, and the pressure of the gas storage tank 2 increases slowly until reaching an equilibrium position again. With the continuous leakage of the tested valve 1, the pressure in the gas storage tank 2 is continuously reduced, the mass block 10 is continuously lowered, and the whole system is constantly reaching a new balance. Until the measurement time t has elapsed, the position of the mass block 10 at this time is recorded with a measuring ruler, which is denoted as h2. In this system, since the quality of the mass block 10 itself remains unchanged, and the leakage process of the tested valve 1 can be regarded as a slow process, the surface friction force on the mass block 10 can be regarded as a constant value, and the friction The force is negligible compared to the weight of the mass 10 itself. Therefore, the pressure in the entire cavity also remains constant, that is, constant pressure, which can keep the tested valve 1 under the standard pressure all the time, thereby improving the measurement accuracy. At the same time, the COP seal ring 10-2 is used for sealing between the mass block 10 and the mass block working pipeline 9. The COP seal ring has the characteristics of small starting resistance, small friction force and strong sealing ability. At the same time, silicon oil is added between the mass blocks 10 10-3, the liquid has a strong seal to the gas, which increases the airtightness of the entire sealing device and improves the measurement accuracy of the entire device. At the same time, in order to improve the guiding precision of the mass block 10, a guiding column 11 is installed.
根据上述方案，在测量的标准压力过大情况下，需要较大重量的质量块10才能平衡标准压力，这对***会造成较大负担，因此，本发明进一步在质量块10上端添加了滑轮组机构。通过滑轮组8自身的省力性质可以改变绳子股数进而改变左右两端的压力，通过合适的绳子股数，可以使质量块自身重量不至于过大，便于检测。如图1、2所示，第一根绳子的两端分别与质量块10的下部连接，第一根绳子对折以后形成两股绳子，该两股绳子分别绕过固定在质量块10的下部的定滑轮8-1和定滑轮8-2，对质量块10施加向下的压力，两根绳子以质量块10的轴线为中轴对称。该两股绳子的中部绕过动滑轮8-3，动滑轮8-3与第二根绳子固定以后，该第二根绳子穿过定滑轮8-4后与滑轮组8-5下端固定连接。滑轮组8-5上端与小质量块8-6用绳子组合连接。According to the above scheme, when the measured standard pressure is too large, a mass block 10 with a relatively large weight is required to balance the standard pressure, which will cause a large burden on the system. Therefore, the present invention further adds a pulley block mechanism at the upper end of the mass block 10 . The number of strands of the rope can be changed through the labor-saving nature of the pulley block 8 itself, thereby changing the pressure at the left and right ends, and the weight of the mass block itself can be prevented from being too large through an appropriate number of strands of rope, which is convenient for detection. As shown in Figures 1 and 2, the two ends of the first rope are respectively connected to the lower part of the mass block 10. After the first rope is folded in half, two strands of rope are formed. The fixed pulley 8-1 and the fixed pulley 8-2 exert downward pressure on the mass block 10, and the two ropes are symmetrical with the axis of the mass block 10 as the central axis. The middle part of these two strands of rope walks around movable pulley 8-3, and after movable pulley 8-3 is fixed with the second rope, this second rope passes fixed pulley 8-4 and is fixedly connected with pulley block 8-5 lower end. The upper end of block pulley 8-5 is combined with small mass block 8-6 and is connected with rope.
定、动滑轮组装成滑轮组时，可以通过增加绕过动滑轮的绳子股数，以使受力分担到更多股的绳子上，实现采用较小的小质量块8-6即可平衡较大的标准压力，如图2所示，其中滑轮组8-5的绳子为3股，可以让小质量块8-6自身重量3倍的力作用在质量块10上，从而使质量块10自身重量不是很大。当改变绳子的绕绳股数时，可以得到不同的比例的质量块重量，当测试压力增大时，便可使绳子股数增大以达到减小质量块重量的目的)When the fixed and movable pulleys are assembled into a pulley block, the number of rope strands bypassing the movable pulley can be increased to share the force on more strands of rope, so that a larger standard can be balanced by using a smaller small mass 8-6 Pressure, as shown in Figure 2, wherein the rope of pulley block 8-5 is 3 strands, can allow the power of 3 times of the own weight of small mass block 8-6 to act on mass block 10, thereby makes mass block 10 own weight not very big . When changing the number of strands around the rope, you can get different proportions of mass block weight, when the test pressure increases, you can increase the number of rope strands to achieve the purpose of reducing the weight of the mass block)
进一步的，本发明在储气罐2和质量块工作管道9之间的气体输送管道12管道上添加一个和气体输送管道12平行并列的增压机构5即增压机构的两端和原始的气体输送管道12并列设置，在增压机构5的两端的气体输送管道12上增设截止阀13，同时在增压机构5的两端的管道上增加截止阀3与7，方便实现增压机构5能够根据需要实现增压功能和退出增压功能，增压机构5利用两个截面积不同的活塞达到活塞两边的压力不同，使靠近质量块10一边的活塞面积A2大一些，靠近储气罐2一边的活塞面积A1小一些，当整个腔体里面压力达到恒压时，根据A1*P1＝A2*P2，面积大的一边压力小， 即靠近质量块的一边压力小，P2<P1，而P2*A2需要与质量块自身重量达到平衡。当测试的标准压力较大时，关闭截止阀13，打开截止阀3与截止阀7，使增压机构5开始工作，将增压机构5中活塞左边储气罐里面较大的压力转换为活塞右边较小的压力，这样不用更换大的质量块10就可以测出较大测试压力的阀的泄漏量，也可以减小压力进而可以减小质量块10自身的重量，进而满足此测试压力的要求。Further, the present invention adds a booster mechanism 5 parallel to the gas delivery pipeline 12 on the gas delivery pipeline 12 pipeline between the gas storage tank 2 and the mass block working pipeline 9, that is, the two ends of the booster mechanism and the original gas Conveying pipeline 12 is arranged side by side, on the gas conveying pipeline 12 of the two ends of supercharging mechanism 5, set up shut-off valve 13, increase shut-off valve 3 and 7 on the pipeline at the two ends of supercharging mechanism 5 simultaneously, conveniently realize supercharging mechanism 5 can according to It is necessary to realize the supercharging function and exit the supercharging function. The supercharging mechanism 5 uses two pistons with different cross-sectional areas to achieve different pressures on both sides of the piston, so that the area A2 of the piston close to the side of the mass block 10 is larger, and the area A2 of the side close to the gas storage tank 2 is larger. The piston area A1 is smaller. When the pressure in the entire cavity reaches a constant pressure, according to A1*P1=A2*P2, the pressure on the side with a large area is small, that is, the pressure on the side close to the mass block is small, P2<P1, and P2*A2 It needs to be balanced with the mass block's own weight. When the standard pressure of the test is high, close the shut-off valve 13, open the shut-off valve 3 and the shut-off valve 7, and make the supercharging mechanism 5 start to work, and convert the relatively large pressure in the gas storage tank on the left side of the piston in the supercharging mechanism 5 to the piston The pressure on the right side is smaller, so that the leakage of the valve with a larger test pressure can be measured without replacing the large mass 10, and the pressure can also be reduced to reduce the weight of the mass 10 itself, thereby meeting the requirements of the test pressure. Require.
阀的泄漏量是通过质量块10在时间t内的位移Δh＝h
1-h
2进行计算得到的。具体计算如下：
The leakage amount of the valve is obtained by calculating the displacement Δh=h 1 −h 2 of the mass block 10 within the time t. The specific calculation is as follows:
根据理想气体状态方程，According to the ideal gas state equation,
PV＝nRTPV = nRT
经过泄露时间t后，泄露出去的气体为，After the leakage time t, the leaked gas is,
转换得到泄漏量为Converted to get leakage as
其中R和T
0＝273K都为常数,仅Δh为测量值，根据以上即可得到泄漏量；
Among them, R and T 0 = 273K are constants, only Δh is the measured value, and the leakage can be obtained according to the above;
根据所述压力平衡阀泄漏量检测装置包括机械结构部分、质量块密封部分和减压机构部分的具体形式与工作原理，其组装方法的实施要点如下：According to the specific form and working principle of the pressure balance valve leakage detection device including the mechanical structure part, the mass block sealing part and the decompression mechanism part, the implementation points of the assembly method are as follows:
被测阀1的气流入口使用法兰与气体输送管道19的气流出口连接，并用螺栓固定。气体输送管道12与气体输送管道4之间用法兰安装截止阀3，并用螺栓固定。气体输送管道4与气体输送管道6之间用法兰安装增压机构5，并用螺栓固定。储气罐2的气流出口使用法兰与气体输送管道19的气流入口连接，并用螺栓固定。The gas flow inlet of the tested valve 1 is connected with the gas flow outlet of the gas delivery pipeline 19 with a flange, and fixed with bolts. The shut-off valve 3 is installed with a flange between the gas delivery pipeline 12 and the gas delivery pipeline 4, and is fixed with bolts. The pressure boosting mechanism 5 is installed with a flange between the gas delivery pipeline 4 and the gas delivery pipeline 6, and is fixed with bolts. The gas flow outlet of the gas storage tank 2 is connected with the gas flow inlet of the gas delivery pipeline 19 using a flange, and fixed with bolts.
气体输送管道12与气体输送管道6之间用法兰安装截止阀7，并用螺栓固定。截止阀13用法兰安装在气体输送管道12之间，并用螺栓固定。气体压缩机16与气体输送管道17之间用法兰安装截止阀15，并用螺栓固定。同时储气罐2的另一个气流出口使用法兰与气体输送管道12的气流入口连接，并用螺栓固定。The shut-off valve 7 is installed with a flange between the gas delivery pipeline 12 and the gas delivery pipeline 6, and is fixed with bolts. The shut-off valve 13 is installed between the gas delivery pipelines 12 with a flange, and is fixed with bolts. The stop valve 15 is installed with a flange between the gas compressor 16 and the gas delivery pipeline 17, and is fixed with bolts. At the same time, the other air outlet of the gas storage tank 2 is connected with the air inlet of the gas delivery pipeline 12 with a flange, and fixed with bolts.
压力表14安装在气体输送管道12上用螺纹连接。The pressure gauge 14 is installed on the gas delivery pipeline 12 and is threaded.
气体压缩机16的气流出口与气体输送管道16的气流入口连接。气体输送管道17的气流出口使用法兰与储气罐2的气流入口连接，并用螺栓4固定。The gas flow outlet of the gas compressor 16 is connected with the gas flow inlet of the gas delivery pipeline 16 . The gas flow outlet of the gas delivery pipeline 17 is connected with the gas flow inlet of the gas storage tank 2 with a flange, and fixed with bolts 4 .
压力表18安装在储气罐2罐体上用螺纹连接。The pressure gauge 18 is installed on the gas storage tank 2 tank body and is threaded.
质量块10的表面凹槽与质量块工作管道9之间使用COP密封圈10-2进行连接。硅油10-3注入到质量块10中间表面与质量块工作管道9形成的凹槽中。导向柱11与质量块10组合连接。A COP sealing ring 10-2 is used to connect the surface groove of the mass block 10 and the mass block working pipeline 9. Silicone oil 10-3 is injected into the groove formed by the middle surface of the mass block 10 and the working pipe 9 of the mass block. The guide column 11 is combined with the mass block 10 .
按照上述的组装方法所实现的压力平衡阀泄漏量检测测量装置，其测试方法如下：The test method of the pressure balance valve leakage detection and measurement device realized according to the above assembly method is as follows:
气体压缩机16向储气罐2中提供气体，针对于某种测试阀而言，测量泄漏量时气体压力需要达到标准的测试压力，故当储气罐2中的气体越来越多时，储气罐2中的压力也越来越大，直到压力表14和压力表18上的示数正好是测试所需要的标准压力时，停止供气。The gas compressor 16 provides gas in the gas storage tank 2. For a certain test valve, the gas pressure needs to reach the standard test pressure when measuring the leakage, so when there is more and more gas in the gas storage tank 2, the gas storage tank 2 The pressure in the gas tank 2 is also increasing, until the indications on the pressure gauge 14 and the pressure gauge 18 are just in time when the required standard pressure of the test, stop the gas supply.
利用测量尺记录此时质量块10位置，记作h1。Use a measuring ruler to record the position of the mass block 10 at this time, denoted as h1.
当被测阀1有微量泄露时，储气罐2中的压力减小，此时质量块10的重力大于气体作用在质量块10表面的压力，质量块10因自身重力下降，导致整个腔体的体积减小，储气罐2的压力又慢慢增大，直到又达到一个平衡位置。随着被测阀1的不断泄露，储气罐2中的压力不断减小，质量块10不断下降，整个***又不断达到新的平衡。When the valve 1 under test leaks slightly, the pressure in the gas storage tank 2 decreases. At this time, the gravity of the mass block 10 is greater than the pressure of the gas acting on the surface of the mass block 10, and the mass block 10 drops due to its own gravity, causing the entire cavity to The volume of the gas tank 2 decreases, and the pressure of the gas storage tank 2 increases slowly until reaching an equilibrium position again. With the continuous leakage of the tested valve 1, the pressure in the gas storage tank 2 is continuously reduced, the mass block 10 is continuously lowered, and the whole system is constantly reaching a new balance.
直到经过测量时间t后，利用测量尺记录此时质量块10位置，记作h2。Until the measurement time t has elapsed, the position of the mass block 10 at this time is recorded with a measuring ruler, which is denoted as h2.
在该***中，由于质量块10自身的质量不变，且被测阀1泄露过程可以看作是一个缓慢的过程，质量块10所受的表面摩擦力可看做是一个定值，且摩擦力相较于质量块10自身重力来说可以忽略。故整个腔体内的压力也保持不变，即为恒压，可以使被测阀1一直处于标准压力之下，提高了测量的精度。In this system, since the quality of the mass block 10 itself remains unchanged, and the leakage process of the tested valve 1 can be regarded as a slow process, the surface friction force on the mass block 10 can be regarded as a constant value, and the friction The force is negligible compared to the weight of the mass 10 itself. Therefore, the pressure in the entire cavity also remains constant, that is, constant pressure, which can keep the tested valve 1 under the standard pressure all the time, thereby improving the measurement accuracy.
同时在对质量块10与质量块工作管道9之间利用COP密封圈10-2进行密封，COP密封圈具有启动阻力小、摩擦力小与密封能力强等特点，同时质量块10-1之间添加硅油10-3，液体对气体的密封性较强，增加了整个密封装置的气密性，提高了整个装置的测量精度。同时为了提高质量块10的导向精度，安装导向柱11。At the same time, the COP sealing ring 10-2 is used for sealing between the mass block 10 and the mass block working pipeline 9. The COP sealing ring has the characteristics of small starting resistance, small friction force and strong sealing ability. At the same time, the gap between the mass block 10-1 Adding silicone oil 10-3, the liquid has a stronger seal to the gas, which increases the airtightness of the entire sealing device and improves the measurement accuracy of the entire device. At the same time, in order to improve the guiding precision of the mass block 10, a guiding column 11 is installed.
为了不让质量块10自身重量因为测量的标准压力过大，在质量块10上端添加了滑轮组机构，并在管道前面添加了增压机构5。其具体原理是通过滑轮组8自身的省力性质可以改变绳子股数进而改变左右两端的压力，通过合适的绳子股数，可以使质量块自身重量不至于过大，便于检测。同时当被测阀测试压力改变时，增压机构5也可以减小压力进而可以减小质量块10自身的重量，进而满足此测试压力的要求。同时可将滑轮组8根据不同的被测阀1的标准测量压力制作不同的绳子股数，适用于不同泄露量测试标准压力的场合。In order to prevent the weight of the mass block 10 from being too large due to the measured standard pressure, a pulley block mechanism is added at the upper end of the mass block 10, and a booster mechanism 5 is added in front of the pipeline. Its specific principle is that the number of rope strands can be changed by the labor-saving nature of the pulley block 8 itself, and then the pressure at the left and right ends can be changed. With an appropriate number of rope strands, the weight of the mass block itself can be prevented from being too large, which is convenient for detection. At the same time, when the test pressure of the valve under test changes, the booster mechanism 5 can also reduce the pressure and thereby reduce the weight of the mass block 10 itself, thereby meeting the requirements of the test pressure. At the same time, the pulley block 8 can be made into different numbers of rope strands according to the standard measurement pressure of the different tested valves 1, which is applicable to occasions where the standard pressure is tested for different leaks.
应当理解的是，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，而所有这些改进和变换都应属于本发明所附权利要求的保护范围。It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present invention.
Claims (11)
- 一种基于恒压实验的压力平衡阀阀泄漏量检测装置，其特征在于，包括被测阀(1)、储气罐(2)、质量块工作管道(9)、质量块(10)、截止阀(15)、气体压缩机(16)；被测阀(1)的气流入口与储气罐(2)通过气体输送管道连接；气体压缩机(16)与储气罐(2)通过气体输送管道连接；储气罐(2)的另一个气流出口与气体输送管道(12)的气流入口连接，并用螺栓固定，气体输送管道(12)的气流出口连接到质量块工作管道(9)，质量块(10)与质量块工作管道(9)之间气密连接，质量块(10)可以根据质量块工作管道(9)中的气体压力大小在质量块工作管道(9)中***；待测阀的泄漏量通过质量块(10)在时间t内的位移Δh＝h 1-h 2进行计算得到。 A pressure balance valve leakage detection device based on a constant pressure experiment, characterized in that it includes a measured valve (1), a gas storage tank (2), a mass block working pipeline (9), a mass block (10), a cut-off Valve (15), gas compressor (16); the gas flow inlet of the measured valve (1) is connected to the gas storage tank (2) through a gas delivery pipeline; the gas compressor (16) and the gas storage tank (2) are connected through a gas delivery Pipeline connection; another airflow outlet of the gas storage tank (2) is connected with the airflow inlet of the gas delivery pipeline (12), and is fixed with bolts, and the airflow outlet of the gas delivery pipeline (12) is connected to the mass block working pipeline (9), and the mass Air-tight connection between the block (10) and the mass block working pipeline (9), the mass block (10) can move freely in the mass block working pipeline (9) according to the gas pressure in the mass block working pipeline (9); The leakage of the test valve is obtained by calculating the displacement Δh=h 1 -h 2 of the mass block (10) within the time t.
- 根据权利要求1所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，其特征在于，质量块(10)的表面凹槽与质量块工作管道(9)之间使用COP密封圈(10)-(2)进行连接；硅油(10)-(3)注入到质量块(10)中间表面与质量块工作管道(9)形成的凹槽中。The pressure balance valve leakage detection device based on constant pressure experiment according to claim 1, characterized in that a COP sealing ring (10) is used between the surface groove of the mass block (10) and the mass block working pipeline (9) )-(2) for connection; silicone oil (10)-(3) is injected into the groove formed by the middle surface of the mass block (10) and the mass block working pipeline (9).
- 根据权利要求1所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，其特征在于，还包括导向柱(11)，导向柱(11)与质量块(10)组合连接，为质量块的运动提供导向作用。The pressure balance valve leakage detection device based on constant pressure experiment according to claim 1, characterized in that it also includes a guide column (11), and the guide column (11) is combined with the mass block (10) to form a mass block movement provides guidance.
- 根据权利要求1所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，其特征在于，气体输送管道(12)上安装有压力表(14)；储气罐(2)罐体上安装压力表(18)。The pressure balance valve leakage detection device based on constant pressure experiment according to claim 1, characterized in that, a pressure gauge (14) is installed on the gas delivery pipeline (12); Pressure gauge (18).
- 根据权利要求1所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，其特征在于，在质量块(10)的下部连接有滑轮组机构，滑轮组中包括小质量块(8-6)，通过滑轮组力的放大作用将小质量块(8-6)的重量放大后施加在质量块(10)，以减轻质量块(10)的重量。The pressure balance valve leakage detection device based on constant pressure experiment according to claim 1, characterized in that, a pulley block mechanism is connected to the bottom of the mass block (10), and a small mass block (8-6) is included in the pulley block, The weight of the small mass block (8-6) is amplified and then applied to the mass block (10) through the amplifying effect of the force of the pulley block, so as to reduce the weight of the mass block (10).
- 根据权利要求5所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，其特征在于，所述滑轮组机构中，第一根绳子的两端分别与质量块(10)的下部连接，第一根绳子对折以后形成两股绳子，该两股绳子分别绕过固定在质量块(10)的下部的定滑 轮(8-1)和定滑轮(8-2)，对质量块(10-1)施加向下的压力，两根绳子以质量块(10-1)的轴线为中轴对称；该两股绳子的中部绕过动滑轮(8-3)，动滑轮(8-3)与第二根绳子固定以后，该第二根绳子穿过定滑轮(8-4)后与滑轮组(8-5)下端固定连接；滑轮组(8-5)上端与小质量块(8-6)用绳子组合连接。The pressure balance valve leakage detection device based on constant pressure experiment according to claim 5, characterized in that, in the pulley block mechanism, the two ends of the first rope are respectively connected to the lower part of the mass block (10), and the second After a rope is folded in half, two strands of rope are formed, and the two strands of rope go around the fixed pulley (8-1) and the fixed pulley (8-2) fixed on the bottom of the mass block (10) respectively. ) exerts downward pressure, and the two ropes are symmetrical with the axis of the mass block (10-1); After the rope is fixed, the second rope passes through the fixed pulley (8-4) and is fixedly connected with the lower end of the pulley block (8-5); the upper end of the pulley block (8-5) is connected with the small mass block (8-6) with a rope .
- 根据权利要求1所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，其特征在于，在储气罐(2)和质量块工作管道(9)之间的气体输送管道(12)管道上添加一个和气体输送管道(12)平行并列的增压机构(5)，即增压机构的两端和原始的气体输送管道(12)并列设置，在增压机构(5)的两端的气体输送管道(12)上增设截止阀(13)，同时在增压机构(5)的两端的管道上增加截止阀(3)与截止阀(7)，增压机构(5)能够根据需要实现增压功能和退出增压功能。The pressure balance valve leakage detection device based on constant pressure experiment according to claim 1, characterized in that the gas delivery pipeline (12) pipeline between the gas storage tank (2) and the mass working pipeline (9) Add a booster mechanism (5) parallel to the gas delivery pipeline (12), that is, the two ends of the booster mechanism and the original gas delivery pipeline (12) are arranged side by side, and the gas at the two ends of the booster mechanism (5) A shut-off valve (13) is added on the conveying pipeline (12), and a shut-off valve (3) and a shut-off valve (7) are added on the pipelines at both ends of the supercharging mechanism (5) at the same time, and the supercharging mechanism (5) can realize increasing press function and exit boost function.
- 根据权利要求7所述的基于恒压实验的压力平衡阀阀泄漏量检测装置，其特征在于，增压机构(5)利用两个截面积不同的活塞达到活塞两边的压力不同，使靠近质量块(10)一边的活塞面积大于靠近储气罐(2)一边的活塞面积；当测试的标准压力较大时，关闭截止阀(13)，打开截止阀(3)与截止阀(7)，使增压机构(5)开始工作，将增压机构(5)中活塞左边储气罐里面较大的压力转换为活塞右边较小的压力。The pressure balance valve leakage detection device based on constant pressure experiment according to claim 7, characterized in that, the supercharging mechanism (5) utilizes two pistons with different cross-sectional areas to achieve different pressures on both sides of the piston, so that the pressure close to the mass block (10) The piston area on one side is larger than the piston area on the side near the gas storage tank (2); when the standard pressure of the test is relatively high, close the shut-off valve (13), open the shut-off valve (3) and the shut-off valve (7), so that Supercharging mechanism (5) starts working, and the bigger pressure in the gas storage tank on the left side of piston in the supercharging mechanism (5) is converted into the less pressure on the right side of piston.
- 根据权利要求1-8任一所述装置的阀泄漏量测量方法，其特征在于，气体压缩机(16)向储气罐(2)中提供气体，将储气罐(2)中的压力提高到的标准压力，停止供气，利用测量尺记录此时质量块(10)位置，记作h1；当被测阀(1)有微量泄露时，储气罐(2)中的压力减小，此时质量块(10)自身的重力大于气体作用在质量块(10)表面的压力，质量块(10)因自身重力下降；随着被测阀(1)的不断泄露，储气罐(2)中的压力不断减小，质量块(10)不断下降，整个***又不断达到新的平衡；直到经过测量时间t后，利用测量尺记录此时质量块(10)位置，记作h2；待测阀的泄漏量通过质量块(10)在时间t内的位移Δh＝h 1-h 2进行计算得到。 According to the valve leakage measurement method of any one of claims 1-8, it is characterized in that the gas compressor (16) provides gas to the gas storage tank (2) to increase the pressure in the gas storage tank (2) When the standard pressure reaches the standard pressure, stop the gas supply, use the measuring ruler to record the position of the mass block (10) at this time, and denote it as h1; when the measured valve (1) leaks slightly, the pressure in the gas storage tank (2) decreases, Now the gravity of the mass block (10) is greater than the pressure of the gas acting on the surface of the mass block (10), and the mass block (10) descends due to its own gravity; along with the continuous leakage of the tested valve (1), the gas storage tank (2 ), the pressure in the mass block (10) keeps decreasing, and the whole system reaches a new equilibrium; until the measurement time t is passed, use a measuring ruler to record the position of the mass block (10) at this time, and record it as h2; The leakage of the test valve is obtained by calculating the displacement Δh=h 1 -h 2 of the mass block (10) within the time t.
- 根据权利要求9所述的阀泄漏量测量方法，其特征在于，当测试的标准压力较大时，使增压机构(5)开始工作，将增压机构(5)中活塞左边储气罐里面较大的压力转换为活塞右边较小的压力，这样不用更换大的质量块(10)就可以测出较大测试压 力的阀的泄漏量。The method for measuring valve leakage according to claim 9, characterized in that, when the standard pressure of the test is relatively high, the booster mechanism (5) is started to work, and the gas storage tank on the left side of the piston in the booster mechanism (5) is The larger pressure is converted into the smaller pressure on the right side of the piston, so that the leakage of the valve with larger test pressure can be measured without changing a large mass (10).
- 根据权利要求9所述的阀泄漏量测量方法，其特征在于，当测试的标准压力较大时，通过滑轮组力的放大作用将小质量块(8-6)的重量放大后施加在质量块(10)上，以减轻质量块(10)的重量。The valve leakage measurement method according to claim 9, characterized in that, when the standard pressure of the test is relatively large, the weight of the small mass (8-6) is amplified and applied to the mass ( 10), to reduce the weight of mass block (10).
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| CN115326314B (en) * | 2022-10-10 | 2023-01-13 | 西南医科大学附属医院 | Machine control leakage test control system of anesthesia machine |
| CN117472107B (en) * | 2023-12-26 | 2024-04-16 | 湖南省计量检测研究院 | Control method for balance working position of piston type pressure gauge |
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