CN103454168B - The explosion-proof O type circle RGD detection method of petrochemical industry valve - Google Patents
The explosion-proof O type circle RGD detection method of petrochemical industry valve Download PDFInfo
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Abstract
A kind of petrochemical industry valve of the present invention explosion-proof O type circle RGD detection system and detection method thereof, it comprise band RGD tool RGD tool container, special box induction furnace, test gas mixed flow and analytical equipment, gas boosting control system, data acquisition and information processing control system, test gas bottle group, discharge safety practice, mutual nonreactive test gas mixes by blending ratio proportioning with analytical equipment through test gas mixed flow by test gas bottle group, and stresses on RGD tool container by gas boosting control system control filling control.Of the present inventionly set up a set of RGD detection technique and failure analysis evaluation method, solve with compensate for conventional to stretch, hardness etc. detects malfunctioning in quick pressure releasing situation Explosive Failure Performance Detection of elastic rubber material " high pressure-infiltration ", the failure mechanism applied in High Temperature High Pressure (or high pressure) hydrocarbon operating mode for improving resilient material lays the foundation.
Description
Technical field
The invention belongs to petrochemical complex detection technique field, be specifically related to a kind of petrochemical industry valve explosion-proof O type circle detection system and detection method thereof.
Background technology
In recent years, affected by the factors such as the economy downturn of the states such as America and Europe and home costs rising, foreign export situation allows of no optimist.Simultaneously, outlet valve is faced with the challenge of severeer trade technical measures, and its outstanding behaviours is that technological innovation is not enough lacks with Product checking technology or evaluation method or be not inconsistent international related standard requirements for product (high parameter: high temperature, high pressure, overcritical etc. and the special operation condition such as low temperature, nuclear power).
At present, the consumption of petrochemical industry valve accounts for the ratio of the total consumption of valve more than 50%.In recent years, in petrochemical complex gas industry valve, explosion-proof O type circle product and detection technique and evaluation means problem highlight more.As regulation in API6D " oil and gas industrial pipeline induction system pipeline valve ": pressure is at CL600 (10MPa) and above for the valve of hydrocarbon gas, and its O type circle should select explosion-proof O type circle; Total company current techique specification " pipeline valve " specifies: except ClassA(and medium are water, air, nitrogen, fluid oil, temperature is room temperature to 75 DEG C, for the operating mode such as pouring water) outer other grades must pass through RapidGasDecompression (hereinafter referred to as RGD) or AED (Anti-explosionDecompression) test.At present, the explosion-proof O type cycle basis that domestic petrochemical industry and natural gas high pressure valve adopt is originally from import, and its price is the decades of times even hundred times of domestic like product.Its main cause is to lack explosion-proof O type circle product quality feedback means (i.e. RGD detection technique) and corresponding examination criteria technical manual system (method), thus cannot solve petrochemical pipe valve sealing element (O type circle) the High Temperature High Pressure hydrocarbon operating mode again and again occurred was lost efficacy the Trade technique difficult problem caused, can not effective evaluation this operating mode valve products quality and Continual Improvement.
Leakage problem is all outstanding problem and the difficult problem of valve all the time, the accident majority that the leakage of the petrochemical unit, plant equipment etc. of China causes is caused by valve invalidation, and the cause that valve leak lost efficacy just its seal adopted (O type circle, graphite etc.) lost efficacy and machining accuracy with coordinate backlog demand etc.Therefore, the key solving valve leak problem is its sealing property, and the key improving sealing property is choose reasonable, the accurate evaluation (or detection) of O-ring seal and uses.
RGD(RapidGasCompression) detect, its definition is that the inner rapid pressure reduction of bearing device causes infiltrating the media expansion of resilient material (as O type circle) so that the method for inspection of explosion.Its prerequisite is the rate of diffusion that the pressure decrease rate of bearing device inside must be greater than the medium infiltrating resilient material inside.
The domestic understanding to RGD detection technique is started late, mainly in recent years along with foreign oil natural gas line valve demand increases year by year, the important indicator that this product has been listed in the use of high pressure valve explosion-proof O type circle in is suggested, and RGD detects and also lists one of these series products essential items for inspection in.Since then, some Primary Study have been done by part valve cartel equipment development enterprise, and prepared RGD checkout equipment, but there is following shortcoming: the reasons such as the design of O type circle sectional fixture is unreasonable, type of heating design is unreasonable, prepared RGD checkout equipment exist too simple and crude, accuracy is not high, automatization level is not enough, potential safety hazard serious (the inflammable operating mode of High Temperature High Pressure) etc. and detection method improper, accurate authoritative conclusion cannot be made to the actual opposing RGD performance of valve explosion-proof O type circle.
Summary of the invention
The object of this invention is to provide a kind of rational in infrastructure, perfect petrochemical industry valve explosion-proof O type circle detection system and detection method thereof.
For overcoming above-mentioned defect, a kind of petrochemical industry valve of the present invention explosion-proof O type circle RGD detection system and detection method thereof, it comprises the RGD tool container of band RGD tool, special box induction furnace, test gas mixed flow and analytical equipment, gas boosting control system, data acquisition and information processing control system, test gas bottle group, discharge safety practice, mutual nonreactive test gas mixes by blending ratio proportioning with analytical equipment through test gas mixed flow by test gas bottle group, and stress on RGD tool container by gas boosting control system control filling control, RGD tool in fit sealing RGD tool container is provided with explosion-proof O type circle, the pressure releasing of RGD tool container is controlled to implement by the discharge safety practice be connected on RGD tool container, RGD tool container is placed in special box induction furnace, special box induction furnace is with data acquisition and information processing control system, first explosion-proof O type circle to be installed on RGD tool and to be placed in fit sealing in RGD tool container, again RGD tool container is loaded in special box induction furnace, nitrogen purges the air in RGD tool container removal RGD tool container, 1min is purged again with to mix the test(ing) medium that supercharging obtains with analytical equipment and gas supercharge control system proportioning through test gas mixed flow, then fill RGD tool container with test(ing) medium and be forced into 1MPa, special box induction furnace heating RGD tool container is to test temperature, and record initial temperature, after temperature stabilization 10min, RGD tool container is forced into test pressure, test pressure and temperature stabilization is kept at the trial, quick pressure releasing after test period, and zero-pressure state stops 1 hour under test temperature, again test pressure is forced into, repeating pressurization, after pressure release 4 circulation, last pressure release is also cooled to room temperature, stop to dismantle after 24 hours and take a sample to check, thus complete the detection of explosion-proof O type circle explosion-proof performance.
Of the present inventionly set up a set of RGD detection technique and failure analysis evaluation method, solve with compensate for conventional to stretch, hardness etc. detects malfunctioning in quick pressure releasing situation Explosive Failure Performance Detection of elastic rubber material " high pressure-infiltration ", the failure mechanism applied in High Temperature High Pressure (or high pressure) hydrocarbon operating mode for improving resilient material lays the foundation, and also establishes technical foundation for carrying out valve explosion-proof O type circle RGD detection with authenticating authority simultaneously.
Improve as one: the seal pad of hard-wired mounting disc on the side that described RGD tool container comprises RGD tool container, sealing RGD tool container side, the centre of described mounting disc offers the communication through-holes for test gas test(ing) medium, groove installed by the O type circle being distributed with mounting O-shaped rings outside communication through-holes, and O type circle is installed groove and seal pad and coordinated and form RGD and detect sealing pair.
Improve as one: the seal pad of hard-wired mounting disc on the side that described RGD tool container comprises RGD tool container, sealing RGD tool container side, the centre of described mounting disc offers the communication through-holes for test gas test(ing) medium, described seal pad inwall offers mounting O-shaped rings O type circle groove is installed, O type circle is installed groove and is coordinated with mounting disc and form RGD and detect sealing pair.
Improve as one: also seal 7 with second on the composition surface of seal pad and RGD tool container.
Improve as one: special box induction furnace adopts Fuzzy Adaptive PID Control and silicon-controlled voltage regulation gas-heated mode, and special box induction furnace comprises stove casing, be placed in the inner bag in stove casing, be placed in the upper cover of the stove casing above stove casing and the heating sensing and controlling system of special box induction furnace, described stove casing offers the air inlet that three are respectively used to RGD tool container, outlet pipe is connected the through hole used with temperature sensor, the inwall surrounding of stove casing is uniformly distributed the heating plate being provided with power and communicating, whole special box induction furnace is supported by stainless steel bracing frame.
Improve as one: also can comprise a thermal circulation fan, described thermal circulation fan is arranged at the bottom of stove casing, to ensure box house rapid and uniform heating and to assist fast cooling when upper cover pulls open.
Improve as one: described gas boosting control system comprises the inlet valve, supercharge pump, the outlet valve that connect successively, inlet valve is connected with analytical equipment with test gas mixed flow, be connected with the first parallel branch at the compressed air inlet place of supercharge pump, the first described parallel branch is formed in parallel with the first air source ball valve by after the second air source ball valve series connection source of the gas solenoid valve.
Improve as one: be connected with the second parallel branch after the outlet valve of described gas boosting control system, described second parallel branch is formed in parallel by electronic control pressure release valve and pressure release needle valve.
Improve as one: described test gas mixed flow and analytical equipment are used in proportioning tank and are evacuated to high pressure tank with supercharging after volume ratio proportioning, and emptying branch road is provided with between proportioning tank and high pressure tank, the described manual aciculiform bleeder valve of emptying route and electrically-controlled valve are formed in parallel.
Improve as one: the discharge safety practice of the pressure releasing of described enforcement RGD tool container comprises the gas flow control valve in the gases at high pressure exit being connected to RGD tool container, high pressure manual aciculiform bleeder valve and U-shaped labyrinth type noise abatement pipe, gas flow control valve, high pressure manual aciculiform bleeder valve, U-shaped labyrinth type noise abatement pipe connect successively, and the fast and stable realizing test(ing) medium is released and noise abatement.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of petrochemical industry valve of invention a kind of embodiment of explosion-proof O type circle RGD detection system.
Fig. 2 is the structural representation of the first embodiment of RGD tool container.
Fig. 3 is the structural representation of the second embodiment of RGD tool container.
Schematic diagram is cutd open in Fig. 4 RGD tool container.
A place partial enlarged drawing in Fig. 5.
Fig. 6 is the structural representation of special box induction furnace.
Fig. 7 is special box induction furnace inner structure schematic diagram.
Fig. 8 is the temperature control flow of special box induction furnace.
Fig. 9 is the process flow diagram of gas boosting control system.
Figure 10 is the process flow diagram of test gas mixed flow and analytical equipment.
Figure 11 is that explosion-proof O type circle sample radial direction etc. cuts schematic diagram.
Figure 12 is explosion-proof O type circle specimen cross section canonical schema (4 grades) after RGD test.
Figure 13 is the schematical top view of the upper cover of special box induction furnace.
Embodiment
As shown in Figure 1, petrochemical industry valve of the present invention a kind of embodiment of explosion-proof O type circle RGD detection system, comprise the RGD tool container III of band RGD tool, special box induction furnace IV, test gas mixed flow and analytical equipment I, gas boosting control system II, data acquisition and information processing control system, test gas bottle group V, discharge safety practice VI, mutual nonreactive test gas mixes by blending ratio proportioning with analytical equipment I through test gas mixed flow by test gas bottle group V, and stress on RGD tool container III by gas boosting control system II control filling control, RGD tool in fit sealing RGD tool container III is provided with explosion-proof O type circle 8, the pressure releasing of RGD tool container III is controlled to implement by the discharge safety practice VI be connected on RGD tool container III, RGD tool container III is placed in special box induction furnace IV, special box induction furnace IV is with data acquisition and information processing control system.
The design of described RGD tool container III can adopt the first embodiment, as shown in Figure 2: the seal pad 4 of hard-wired mounting disc 2 on the side comprising RGD tool container III, sealing RGD tool container III side, the centre of described mounting disc 2 offers the communication through-holes 3 of Φ 20 ~ Φ 30 for test gas test(ing) medium, be distributed with the O type circle installing explosion-proof O type circle 8 in 3 roads outside communication through-holes 3 groove 5, O type circle is installed groove 5 is installed coordinates with seal pad 4 and form RGD and detect sealing pair.RGD tool container III also can adopt the second embodiment, design proposal as shown in Figure 3, the difference of itself and the first embodiment is: three road O type circles are installed groove 5 and are opened on the inwall of seal pad 4, and O type circle is installed groove 5 and coordinated with mounting disc 2 and form RGD and detect sealing pair.Above-mentioned two kinds of design proposals all meet RGD standard sample (cross-sectional area Φ 6.99 or Φ 5.33, internal diameter Φ 113.67) and non-standard sample RGD detection demand, realize one group 3 explosion-proof O type circles 8 RGD test simultaneously, greatly reduce consumptive material and cost, be convenient to O type circle install groove 5 bear long-time High Temperature High Pressure reversed fatigue damage after maintenance.If groove 5 installed by O type circle, damage only need change mounting disc 2 or seal pad 4).
The failure effect that be squeezed to reduce in RGD process of the test explosion-proof O type circle 8 engagement process, shearing etc. causes, the accuracy of RGD testing result and RGD detect the realization of precompressed shrinkage, and described RGD tool container III is cubic shaped and adopts plate seal.Simultaneously in order to ensure the sealing of container in RGD testing process, also seal with second on the composition surface of seal pad 4 with RGD tool container III, as shown in Figure 4, Figure 5, for guaranteeing in RGD testing process, after explosion-proof O type circle 8 Explosive Failure, container is still in sealing state, avoids spillage risk.
Because the most serviceability temperature of elastomeric material is below 80 DEG C, and the modified rubber material that explosion-proof O type circle 8 adopts is as CHEMRAZ526, Silicone(70Shore) 220 DEG C can be reached, so conventional explosion-proof O type circle 8 heating design scheme " constant temperature water bath type of heating " is difficult to meet explosion-proof O type circle RGD testing requirement and firing rate is slow.
As shown in Fig. 6, Fig. 7, Fig. 8, the special box induction furnace IV of the present embodiment adopts Fuzzy Adaptive PID Control to combine with silicon-controlled voltage regulation gas-heated mode, it can realize the controlled even Fast Heating of gas, can realize again RGD detected temperatures quick and precisely heating and cooling control overflow.Described special box induction furnace IV comprises stove casing 6, the inner bag 14 be placed in stove casing 6, be placed in the upper cover 9 of the stove casing 6 above stove casing 6 and the heating sensing and controlling system of special box induction furnace IV, described stove casing 6 offers three air inlets being respectively used to RGD tool container III, outlet pipe is connected the through hole 10 used with temperature sensor, the inwall surrounding of stove casing 6 is uniformly distributed the heating plate being provided with power and communicating, and whole special box induction furnace IV is supported by stainless steel bracing frame 13.In order to ensure the inner rapid and uniform heating of stove casing 6 and assist fast cooling when upper cover 9 pulls open, also a thermal circulation fan 15 is set in the bottom of stove casing 6.
The temperature control mode of special box induction furnace IV: utilize Fuzzy Self-adaptive PID and thyristor regulating depressor to realize temperature control to control heating plate, temperature control flow is as Fig. 8.Monitor heating compartment internal environment gas and RGD tool container III internal gas medium temperature respectively.By this, temperature monitoring is carried out to technological process, and the temperature signal collected is fed back to PID controller, carry out overall temperature and control, thus reach control overflow.Thyristor regulating depressor receives the current signal of 4 ~ 20mA that PID controller exports, adjustment output voltage.Output voltage changes, and the power of heating plate changes thereupon, and then controls heating-up temperature.
Described test gas mixed flow and analytical equipment I are used in proportioning tank 25 and are evacuated to high pressure tank 26 with supercharging after volume ratio proportioning, based on this, design adopts the gas being filled with different pressures in proportioning tank 25 container, and is revised, and can obtain the blending ratio gas needing precision.Proportioning tank 25 adopts emptying, purge, emptying, vacuumize after proportioning again, ensure that the content of gas concentration is accurate.Ensure the ratio of gas concentration at the endpiece configuration concentration monitoring analyzer of proportioning tank 25, can the mixture strength ratio of on-line monitoring proportioning whether meet the demands.In this system, the Stress control of gas and vapor permeation adopts high accuracy pressure transmitter digital control, ensures equipment pressure distributing precision.RGD detects gas proportion mixing principle process as shown in Figure 10.The present embodiment is provided with emptying branch road between proportioning tank 25 and high pressure tank 26, and the described manual aciculiform bleeder valve 27 of emptying route and electrically-controlled valve 28 are formed in parallel.
Gas boosting control system II of the present invention as shown in Figure 9, gas boosting control system II comprises the inlet valve 16, supercharge pump 17, the outlet valve 18 that connect successively, inlet valve 16 is connected with analytical equipment I with test gas mixed flow, be connected with the first parallel branch at the compressed air inlet place of supercharge pump 17, the first described parallel branch is connected by the second air source ball valve 21, and source of the gas solenoid valve 22 is rear to be formed in parallel with the first air source ball valve 20.The effect of the first parallel branch causes testing failure in order to avoid certain component damage in the first parallel branch, ensures carrying out smoothly in test pressurization.
Test gas medium enters pressure charging system by high pressure software, supercharge pump 17 is led to through inlet valve 16 and high pressure filter 19, supercharge pump 17 starts supercharging and output pressure under the compressed air-driven of 0.4 ~ 0.7MPa, RGD tool container III is transported to again through outlet main valve and automatically controlled outlet valve 18, detect pumping rate requirement by RGD, be slowly pressurized to test pressure.
After the outlet valve 18 of gas boosting control system II, evacuation section is connected with the second parallel branch, and described second parallel branch is formed in parallel by electronic control pressure release valve 23 and pressure release needle valve 24.Its purposes is when ensureing process of the test and off-test, effective eliminating of residual gas in the pipeline of gas boosting control system II, avoids one of them valve or circuit failure so that high-potting gas medium to be detained the danger of pipeline.
The discharge safety practice VI of the pressure releasing of the invention process RGD tool container III comprises the gas flow control valve 29 in the gases at high pressure exit being connected to RGD tool container III, high pressure manual aciculiform bleeder valve 30 and U-shaped labyrinth type noise abatement pipe 31, the U-shaped labyrinth type noise abatement pipe 31 of gas flow control valve 29, high pressure manual aciculiform bleeder valve 30,5 ~ 8 joint connects successively, makes test(ing) medium fast to stablize and release and realize the object of noise abatement 10% by 90s.
The present invention uses for reference NORSOKM710 and carries out design studies, petrochemical industry valve with explosion-proof O type circle RGD detection method and test procedure as follows:
table 1 explosion-proof O type circle RGD detection experiment condition
| Project | Content |
| Test(ing) medium | CH 4With CO 2Gas different proportion potpourri |
| Test pressure | ≤ 30MPa, error ± 0.2MPa |
| Test temperature | ≤ 200 DEG C, error ± 2 DEG C |
| Size of sample | Explosion-proof O type circle cross-sectional diameter Φ 5.33 or Φ 6.99, internal diameter Φ 113.67 (or nonstandard another system) |
table 2RGD test procedure
| Sequence number | Test procedure |
| 1 | Cleaning RGD tool container III and sleeve member, install explosion-proof O type circle to RGD tool, then loaded RGD tool container III and fit sealing |
| 2 | First purge with nitrogen, remove the air in RGD tool container III, then purge 1min with test(ing) medium |
| 3 | Fill RGD tool container III with test(ing) medium and be forced into 1MPa |
| 4 | Heating RGD tool container III to test temperature, and record initial temperature |
| 5 | After temperature stabilization 10min, be forced into test pressure |
| 6 | At duration of test, keep test pressure and temperature stabilization, periodic logging test pressure and temperature (general 30s or 60s record once) |
| 7 | Treat that voltage stabilizing temperature retention time terminates, keep test temperature to stablize, container internal pressure of releasing (in the rate request 90s that releases), then under test temperature, zero-pressure stops 1h |
| 8 | Repeat the circulation of above-mentioned 3,5 ~ 7 steps 5, wherein the 1st circulation is 78h, and all the other circulations are 48h |
| 9 | Off-test, to release pressure in RGD tool container III by the rate request of releasing of step 7, then replaces test gas winding-up test chamber 10min with nitrogen, cool to room temperature with the furnace |
| 10 | Stop after 24h ~ 28h until room temperature, can removable container and test tool, take off sample and check in 30min and record specimen surface situation |
The petrochemical industry valve detection method of explosion-proof O type circle RGD:
1. explosion-proof O type circle to be installed on RGD tool and to be placed in fit sealing in RGD tool container III, then RGD tool container III is loaded in special box induction furnace IV;
2. nitrogen purges RGD tool container III and removes air in RGD tool container III, then purges 1min with to mix the test(ing) medium that supercharging obtains with analytical equipment I and gas supercharge control system II proportioning through test gas mixed flow;
3. fill RGD tool container III with test(ing) medium and be forced into 1MPa;
4. special box induction furnace IV heats RGD tool container III to test temperature, and records initial temperature;
5., after temperature stabilization 10min, RGD tool container III is forced into test pressure;
6. at the trial in keep test pressure and temperature stabilization, periodic logging test pressure and temperature (general 30s or 60s record once);
7., after the time to be tested terminates, keep test temperature to stablize, quick pressure releasing container internal pressure, releases in rate request 90s, and zero-pressure state stops 1 hour under test temperature;
8. repeat the circulation of above-mentioned 3 ~ 7 steps 4, wherein the 1st circulation is 78h, and all the other circulations are 48h;
9. to release pressure in RGD tool container III by the rate request of releasing of step 7, then replace test gas winding-up test chamber 10min with nitrogen, cool to room temperature with the furnace;
10. stop after 24h ~ 28h until room temperature, can removable container and test tool, take off sample and check in 30min and record specimen surface situation, thus completing the detection of explosion-proof O type circle explosion-proof performance.
Failure analysis
The detections such as traditional tension test and hardness measurement, can not evaluate the explosion-proof O type circle performance of the applying working condition with potential inner RGD destruction or inefficacy, the such as above hydrocarbon medium occasion of petrochemical complex gas industry valve 10MPa.
RGD(and quick pressure releasing) failure analysis: mainly comprise RGD evaluation and failure level division.Evaluation of result is divided into: outward appearance macro check and explosion-proof O type circle xsect amplify to be analyzed.Failure level is divided into 5 grades (see table 3) according to xsect crack length and quantity.
table 3 explosion-proof O type circle RGD test findings ranking
| Grade | Defect describes |
| 0 | Without internal fissure, pore or bubble |
| 1 | Be less than 4 internal fissures, every bar internal fissure length is less than 50% of cross-sectional diameter and each crack length sum is less than cross-sectional diameter |
| 2 | Be less than 6 internal fissures, every bar internal fissure length be less than cross-sectional diameter 50% and each crack length sum cross-sectional diameter of being less than 2.5 times |
| 3 | Be less than 9 internal fissures, be no more than the length of two internal fissures between 50% ~ 80% of cross-sectional diameter |
| 4 | Be greater than 8 internal fissures, or the length with one and above internal fissure exceedes 80% of cross-sectional diameter |
| 5 | Xsect there is penetrating crack or be separated into fragment completely |
When explosion-proof O type circle 8 sample is after RGD testing process thermal cycling test with pressure in table 2, sample is cut into four sections by Figure 11 requirement radial direction etc.Internal fissure situation in sample cross is observed with microscope or the magnifier that at least can amplify 10 times.Specify to evaluate the result of sample after RGD test by table 3.
It is generally acknowledged, after RGD test, the evaluation of result grade of explosion-proof O type circle exceedes three grades that table 3 specifies and is namely rejected.Figure 12 is O type circle specimen cross section canonical schema after RGD test, owing to this sample cross occurring the internal fissure more than eight, and has the internal fissure length of one or more to exceed 80% of cross-sectional diameter, but without penetrating crack, so be chosen as level Four.
The petrochemical industry valve of the present invention detection system of explosion-proof O type circle RGD, one group three explosion-proof O type circles RGD test simultaneously can be realized, solve the spillage risk problem of RGD tool container III after the explosion of sample explosion-proof O type circle, achieve different explosion-proof O type circle material accurately to heat the difference requirement of RGD test temperature and temperature Quick uniform, the effectively accurately mixing match achieving test(ing) medium CH4 and CO2 reaches RGD testing requirement, achieve the RGD fast and safely supercharging detected and safety of releasing fast, for the explosion-proof detection of RGD of explosion-proof O type circle of petrochemical industry valve provides accurately, reliably, low cost and the explosion-proof checkout equipment foundation of safe RGD, for and to study from inefficacy and under different operating mode, explosion-proof O type circle 8 Testing index lays the foundation and guarantee for improving resilient material and explosion-proof O type circle 8 sealing mechanism.
Claims (7)
1. the explosion-proof O type circle RGD detection method of petrochemical industry valve, it is characterized in that: its detection system adopted comprises the RGD tool container (III) of band RGD tool, special box induction furnace (IV), test gas mixed flow and analytical equipment (I), gas boosting control system (II), data acquisition and information processing control system, test gas bottle group (V), discharge safety practice (VI), mutual nonreactive test gas mixes by blending ratio proportioning with analytical equipment (I) through test gas mixed flow by test gas bottle group (V), and stress on RGD tool container (III) by gas boosting control system (II) control filling control, RGD tool in fit sealing RGD tool container (III) is provided with explosion-proof O type circle (8), the pressure releasing of RGD tool container (III) is controlled to implement by the discharge safety practice (VI) be connected on RGD tool container (III), RGD tool container (III) is placed in special box induction furnace (IV), special box induction furnace (IV) is with data acquisition and information processing control system, described RGD tool container (III) is for cubic shaped and adopt plate seal, hard-wired mounting disc (2) on the side that RGD tool container (III) comprises RGD tool container (III), the seal pad (4) of sealing RGD tool container (III) side, the centre of described mounting disc (2) offers the communication through-holes (3) for test gas circulation, the O type circle of mounting O-shaped rings (8) is installed groove (5) and is distributed in communication through-holes (3) or be opened on the inwall of seal pad (4) outward, O type circle is installed groove (5) and is coordinated with seal pad (4) and form RGD and detect sealing pair, special box induction furnace (IV) adopts Fuzzy Adaptive PID Control and silicon-controlled voltage regulation gas-heated mode, and special box induction furnace (IV) comprises stove casing (6), be placed in the inner bag (14) in stove casing (6), be placed in the upper cover (9) of stove casing (6) and the heating sensing and controlling system of special box induction furnace (IV) of stove casing (6) top, described stove casing (6) offers the air inlet that three are respectively used to RGD tool container (III), outlet pipe is connected the through hole (10) used with temperature sensor, the inwall surrounding of stove casing (6) is uniformly distributed the heating plate being provided with power and communicating, whole special box induction furnace (IV) is supported by stainless steel bracing frame (13), first explosion-proof O type circle (8) to be installed on RGD tool and to be placed in RGD tool container (III) interior fit sealing, again RGD tool container (III) is loaded in special box induction furnace (IV), nitrogen purges the air in RGD tool container (III) removal RGD tool container (III), 1min is purged again with to mix the test(ing) medium that supercharging obtains with analytical equipment (I) and gas supercharge control system (II) proportioning through test gas mixed flow, then fill RGD tool container (III) with test(ing) medium and be forced into 1MPa, special box induction furnace (IV) heating RGD tool container (III) is to test temperature, and record initial temperature, after temperature stabilization 10min, RGD tool container (III) is forced into test pressure, test pressure and temperature stabilization is kept at the trial, quick pressure releasing after test period, and zero-pressure state stops 1 hour under test temperature, again test pressure is forced into, repeating pressurization, after pressure release 4 circulation, last pressure release is also cooled to room temperature, stop to dismantle after 24 hours and take a sample to check, thus complete the detection of explosion-proof O type circle (8) explosion-proof performance.
2. the explosion-proof O type circle RGD detection method of the petrochemical industry valve according to claims 1, is characterized in that: also seal (7) with second on the composition surface of seal pad (4) with RGD tool container (III).
3. the explosion-proof O type circle RGD detection method of the petrochemical industry valve according to claims 1, it is characterized in that: described special box induction furnace (IV) also comprises a thermal circulation fan (15), described thermal circulation fan (15) is arranged at the bottom of stove casing (6), to ensure box house rapid and uniform heating and to assist fast cooling when upper cover (9) pulls open.
4. the explosion-proof O type circle RGD detection method of the petrochemical industry valve according to claims 1, it is characterized in that: described gas boosting control system (II) comprises the inlet valve (16), supercharge pump (17), the outlet valve (18) that connect successively, inlet valve (16) is connected with analytical equipment (I) with test gas mixed flow, be connected with the first parallel branch at the compressed air inlet place of supercharge pump (17), the first described parallel branch is formed in parallel with the first air source ball valve (20) afterwards by the second air source ball valve (21) series connection source of the gas solenoid valve (22).
5. the explosion-proof O type circle RGD detection method of the petrochemical industry valve according to claims 4, it is characterized in that: be connected with the second parallel branch after the outlet valve (18) of described gas boosting control system (II), described second parallel branch is formed in parallel by electronic control pressure release valve (23) and pressure release needle valve (24).
6. the explosion-proof O type circle RGD detection method of the petrochemical industry valve according to claims 1, it is characterized in that: described test gas mixed flow and analytical equipment (I) are used in proportioning tank (25) and are evacuated to high pressure tank (26) with supercharging after volume ratio proportioning, and emptying branch road is provided with between proportioning tank (25) and high pressure tank (26), the manual aciculiform bleeder valve (27) of emptying described route and electrically-controlled valve (28) are formed in parallel.
7. the explosion-proof O type circle RGD detection method of the petrochemical industry valve according to claims 1, it is characterized in that: the discharge safety practice (VI) of the pressure releasing of described enforcement RGD tool container (III) comprises the gas flow control valve (29) in the gases at high pressure exit being connected to RGD tool container (III), high pressure manual aciculiform bleeder valve (30) and U-shaped labyrinth type noise abatement pipe (31), gas flow control valve (29), high pressure manual aciculiform bleeder valve (30), U-shaped labyrinth type noise abatement pipe (31) connects successively, the fast and stable realizing test(ing) medium is released and noise abatement.
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| CN104215513B (en) * | 2014-08-14 | 2016-06-29 | 合肥通用机械研究院 | High-pressure hydrogen embrittlement structure test device and test method |
| CN107941618A (en) * | 2017-05-09 | 2018-04-20 | 温州瓯宏密封件有限公司 | O-ring knock test system and its test method |
| CN109387338A (en) * | 2017-08-09 | 2019-02-26 | 中国石油化工股份有限公司 | Low leakage sealed performance inspection device |
| CN109387342A (en) * | 2017-08-09 | 2019-02-26 | 中国石油化工股份有限公司 | Low leakage sealed service check method |
| CN110207909B (en) * | 2018-02-28 | 2023-02-03 | 全球能源互联网研究院有限公司 | Aging life prediction method and compression tool for pipeline system sealing structure |
| CN111157235A (en) * | 2018-11-08 | 2020-05-15 | 中国石油化工股份有限公司 | Overtemperature closing performance testing device and method for emergency cut-off valve |
| CN109269878A (en) * | 2018-11-09 | 2019-01-25 | 山东科技大学 | Temperature and humidity control device and its application method in Rock Mechanics Test loading procedure |
| CN110389073A (en) * | 2019-08-30 | 2019-10-29 | 贵州航天精工制造有限公司 | It is a kind of for measuring the test tool of O-ring seal tensile property |
| CN111238802B (en) * | 2020-01-19 | 2021-11-12 | 湖北三江航天红峰控制有限公司 | High low temperature pressurization environment O shape circle compression ratio test device |
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| CN201892639U (en) * | 2010-11-22 | 2011-07-06 | 嘉兴恒威电池有限公司 | Explosion-proof pressure testing device of sealing ring |
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