CN116296410A - Hydrogen peroxide decomposition test system with controllable flow - Google Patents
Hydrogen peroxide decomposition test system with controllable flow Download PDFInfo
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- CN116296410A CN116296410A CN202310174025.2A CN202310174025A CN116296410A CN 116296410 A CN116296410 A CN 116296410A CN 202310174025 A CN202310174025 A CN 202310174025A CN 116296410 A CN116296410 A CN 116296410A
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- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 title claims abstract description 530
- 238000012360 testing method Methods 0.000 title claims abstract description 97
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 53
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 238000012544 monitoring process Methods 0.000 claims description 18
- 238000011144 upstream manufacturing Methods 0.000 claims description 17
- 238000007664 blowing Methods 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 239000008399 tap water Substances 0.000 description 14
- 235000020679 tap water Nutrition 0.000 description 14
- 238000000034 method Methods 0.000 description 11
- 239000003380 propellant Substances 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000001595 flow curve Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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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
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/03—Control of flow with auxiliary non-electric power
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a hydrogen peroxide decomposition test system with controllable flow, which comprises a hydrogen peroxide storage tank, an air supply assembly, a storage tank hydrogen peroxide filling assembly, a storage tank debugging liquid supply assembly and a test piece hydrogen peroxide supply assembly, wherein the air supply assembly is connected with the hydrogen peroxide storage tank; the gas supply assembly is used for injecting high-pressure gas into the hydrogen oxide storage tank; the hydrogen peroxide filling component of the storage tank is used for filling hydrogen peroxide into the hydrogen oxide storage tank; the tank debugging liquid supply assembly is used for injecting debugging liquid into the hydrogen oxide tank; the test piece hydrogen peroxide supply assembly is used for conveying the hydrogen peroxide stored in the hydrogen peroxide storage tank to a hydrogen peroxide channel in the test piece; the test piece hydrogen peroxide supply assembly includes a hydrogen peroxide flow control unit having eight sets of flow gears; and selecting a corresponding flow gear from the hydrogen peroxide flow control unit according to the hydrogen peroxide flow required by the hydrogen peroxide channel. The invention has simple operation, can reach the preset flow in a short time and has stable hydrogen peroxide flow supply.
Description
Technical Field
The invention relates to the field of oxyhydrogen engines, in particular to a hydrogen peroxide decomposition test system with controllable flow.
Background
Aiming at a green, advanced and reliable aerospace design concept, the requirement of reuse of a spacecraft is met, the transport capacity of rocket entering and exiting space is improved, and the existing rocket core-level propellant mostly uses an oxyhydrogen engine with low temperature and high energy, and is green and environment-friendly and capable of being reused. The required flow rate of hydrogen peroxide was also different in the different test activities. For example, in the shutdown process of the hydrogen peroxide engine test, when the hydrogen peroxide is used for cooling the engine, in order to achieve the best cooling effect, a full-flow, mixed-flow or small-flow cooling mode (controllable flow research value) can be adopted according to the real-time situation. Based on the characteristic of easy decomposition of hydrogen peroxide, a specific flow rate of hydrogen peroxide needs to be provided for the test piece.
However, the existing hydrogen peroxide decomposition system has the following defects in the actual use process, and needs to be improved:
1. at present, the hydrogen peroxide supply system in the market controls the hydrogen peroxide flow by automatically adjusting the supply pressure, the operation is complex, the required time is long, and the experimental error generated in the adjustment process is large.
2. During the experiment, corresponding control measures are not adopted for the flow of the propellant, the flow drift generated due to the fluctuation of the air supplementing pressure or other reasons cannot be overcome, and the generated flow is unstable, so that fatigue damage of related devices can be caused, and the unstable flow can also generate the unstable condition of chemical reaction rate during the experiment.
3. In the aspect of safety, the state parameters of the test device are not monitored, the device is easy to fatigue under the condition of long-time large-flow supply, and safety accidents are seriously caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a hydrogen peroxide decomposition test system with controllable flow, which is simple and convenient to operate, can reach a preset flow in a short time and is stable in hydrogen peroxide flow supply.
In order to solve the technical problems, the invention adopts the following technical scheme:
a hydrogen peroxide decomposition test system with controllable flow comprises a hydrogen peroxide storage tank, an air supply assembly, a storage tank hydrogen peroxide filling assembly, a storage tank debugging liquid supply assembly and a test piece hydrogen peroxide supply assembly.
The gas supply assembly is used for injecting high-pressure gas into the hydrogen oxide storage tank.
The tank hydrogen peroxide filling assembly is used for filling hydrogen peroxide into the hydrogen oxide tank.
The tank debugging liquid supply assembly is used for injecting the debugging liquid into the hydrogen oxide tank.
The test piece hydrogen peroxide supply assembly is used for conveying the hydrogen peroxide stored in the hydrogen peroxide storage tank to a hydrogen peroxide channel in the test piece; the test piece hydrogen peroxide supply assembly comprises a hydrogen peroxide flow control unit, wherein the hydrogen peroxide flow control unit is provided with at least two groups of flow gears; and selecting a corresponding flow gear from the hydrogen peroxide flow control unit according to the hydrogen peroxide flow required by the hydrogen peroxide channel.
The hydrogen peroxide flow control unit comprises two hydrogen peroxide buses and N+M supply branch pipes which are arranged between the two hydrogen peroxide buses in parallel; the N+M supply branch pipes comprise N small-flow supply branch pipes and M large-flow supply branch pipes; wherein the hydrogen peroxide delivery amount in each of the large-flow supply branch pipes is larger than the hydrogen peroxide delivery amount in each of the small-flow supply branch pipes at the same delivery pressure.
N=m=2, the hydrogen peroxide flow control unit has eight sets of flow gears.
Each small-flow supply branch pipe is uniformly provided with a small-flow cavitation pipe and a cavitation valve; a large-flow cavitation tube and a cavitation valve are uniformly distributed on each large-flow supply branch pipe; the switching of eight groups of flow gears is further realized through the on-off control of the four cavitation valves.
Each small-flow cavitation tube is a 50g/s cavitation tube, and each large-flow cavitation tube is a 100g/s cavitation tube; the eight sets of flow gears are 50g/s, 100g/s, 200g/s, 250g/s, 300g/s, 400g/s, 450g/s and 500g/s, respectively.
The air supply assembly comprises a high-pressure air source, an air supply branch and an air dynamic adjusting unit arranged in the air supply branch.
The gas dynamic regulating unit comprises a main regulating branch and an auxiliary regulating branch which are arranged in parallel; the main regulating branch and the auxiliary regulating branch comprise a pressurizing valve and a pressurizing pore plate.
The safety monitoring unit comprises a temperature sensor and a pressure sensor.
The temperature sensor comprises a hydrogen peroxide temperature sensor and a test piece temperature sensor; the hydrogen peroxide temperature sensor is used for monitoring the temperature of the hydrogen peroxide conveyed to the test piece by the hydrogen peroxide storage tank; the test piece temperature sensor is used for monitoring the hydrogen peroxide supply temperature in the hydrogen peroxide channel in the test piece.
The pressure sensor comprises a high-pressure gas pressure sensor, a hydrogen peroxide upstream conveying pressure sensor, a hydrogen peroxide downstream conveying pressure sensor and a test piece pressure sensor; the high-pressure gas pressure sensor is used for monitoring the pressure of high-pressure gas injected into the hydrogen oxide storage tank by the gas supply assembly; the hydrogen peroxide upstream delivery pressure sensor is used for monitoring the hydrogen peroxide delivery pressure positioned upstream of the hydrogen peroxide flow control unit; the hydrogen peroxide downstream delivery pressure sensor is configured to monitor a hydrogen peroxide delivery pressure downstream of the hydrogen peroxide flow control unit.
The high-pressure gas injected into the hydrogen oxide storage tank by the gas supply component is nitrogen; the concentration of the hydrogen peroxide injected into the hydrogen oxide storage tank by the storage tank hydrogen peroxide filling component is 90 percent; the tank debugging liquid supply assembly is used for injecting the debugging liquid into the hydrogen oxide tank into the tank.
The device also comprises a test piece blowing unit; the test piece blowing unit is used for blowing the depressurized high-pressure gas to the surface of the test piece.
Also comprises a hydrogen peroxide discharge unit; the hydrogen peroxide discharging unit comprises a hydrogen peroxide discharging main pipe and a hydrogen peroxide discharging auxiliary pipe; the hydrogen peroxide discharge main pipe can discharge hydrogen peroxide in the hydrogen peroxide storage tank; the hydrogen peroxide discharge auxiliary pipe can discharge hydrogen peroxide between the hydrogen peroxide flow rate control unit and the test piece.
The invention has the following beneficial effects: the invention can reach the preset flow (50 g/s-500 g/s) in a short time, and the hydrogen peroxide flow is supplied stably, so that the flow drift caused by the pressure fluctuation of the air supplementing or other reasons can be overcome.
Drawings
FIG. 1 shows a schematic diagram of a flow-controllable hydrogen peroxide decomposition test system according to the present invention.
FIG. 2 is a logic diagram of an automatic emergency shutdown procedure according to the present invention.
Fig. 3 shows a graph of the commissioning flow of tap water in condition 1.
Fig. 4 shows a graph of the commissioning flow of tap water in condition 2.
Fig. 5 shows a graph of the commissioning flow of tap water in condition 3.
FIG. 6 shows a graph of the commissioning flow of tap water in condition 6.
FIG. 7 shows a graph of the commissioning flow of tap water in condition 6.
Fig. 8 shows a graph of the commissioning flow of tap water in condition 7.
FIG. 9 shows a graph of the commissioning flow of tap water in condition 8.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and "first", "second", etc. do not indicate the importance of the components, and thus are not to be construed as limiting the present invention. The specific dimensions adopted in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.
As shown in fig. 1, a hydrogen peroxide decomposition test system with controllable flow comprises a hydrogen peroxide storage tank 1, an air supply assembly, a storage tank hydrogen peroxide filling assembly, a storage tank debugging liquid supply assembly, a test piece hydrogen peroxide supply assembly, a safety monitoring unit, a test piece blowing-off unit, a hydrogen peroxide discharging unit, a pneumatic control unit and a control box.
The lateral wall of hydrogen peroxide storage tank is provided with hydrogen peroxide filler and debugging liquid filler, and the top of hydrogen peroxide storage tank is provided with the air feed and exhaust mouth, and the bottom of hydrogen peroxide storage tank is provided with the hydrogen peroxide export.
The hydrogen peroxide filling port is connected with the hydrogen peroxide filling assembly of the storage tank. The tank hydrogen peroxide filling assembly preferably includes a hydrogen peroxide filling tube and a hydrogen peroxide filling hand valve 27 disposed on the hydrogen peroxide filling tube. By controlling the hydrogen peroxide filling hand valve 27, the hydrogen peroxide with a concentration of 90% is filled into the hydrogen oxide tank.
The debugging liquid filling port is connected with the tank debugging liquid supply assembly, and the tank debugging liquid supply assembly comprises a debugging liquid filling pipe, and a debugging liquid electromagnetic valve and a debugging liquid one-way valve which are sequentially arranged on the debugging liquid filling pipe. In this embodiment, the conditioning fluid is preferably tap water. Therefore, the debugging liquid electromagnetic valve and the debugging liquid check valve are respectively a tap water electromagnetic valve 28 and a tap water check valve 29, and the debugging liquid is injected into the hydrogen oxide storage tank by controlling the tap water electromagnetic valve 28 and the tap water check valve 29.
The hydrogen peroxide outlet is preferably connected with a hydrogen peroxide discharge unit, and the hydrogen peroxide discharge unit comprises a hydrogen peroxide discharge main pipe and a hydrogen peroxide discharge auxiliary pipe; the hydrogen peroxide discharge main pipe can discharge hydrogen peroxide in the hydrogen peroxide storage tank; the hydrogen peroxide discharge auxiliary pipe can discharge hydrogen peroxide between the hydrogen peroxide flow rate control unit and the test piece. Further, the hydrogen peroxide discharge main pipe is provided with a hydrogen peroxide start discharge valve 2, and the hydrogen peroxide discharge auxiliary pipe is preferably provided with a hydrogen peroxide filling discharge hand valve 10. Wherein, the opening time of the hydrogen peroxide discharge valve 2 is as follows: emergency discharge of hydrogen peroxide (i.e. setting 2 for safety) when the hydrogen peroxide tank temperature is detected to be higher than normal (i.e. hydrogen peroxide starts to self-decompose). The above-described hydrogen peroxide filling and discharging hand valve 10 is opened for discharging hydrogen peroxide in the test piece in order to prevent the test piece from being corroded by hydrogen peroxide.
The air supply and exhaust ports are preferably provided with four-way pipes which are respectively connected with an air supply branch, a pressure release branch, a safety exhaust branch and a hydrogen peroxide filling exhaust branch.
The pressure relief branch is preferably provided with a pressure relief solenoid valve 24 which opens during an emergency shutdown.
The safety exhaust branch and the hydrogen peroxide filling exhaust branch preferably share a four-way pipe interface, and a safety valve 25 is arranged on the safety exhaust branch. The safety valve is used for maintaining the pressure of the storage tank at 9MPa, and is opened when the pressure of the storage tank exceeds 9 MPa.
The hydrogen peroxide filling and exhausting branch is preferably provided with a hydrogen peroxide filling and exhausting hand valve 26.
The gas supply assembly is used for injecting high-pressure gas into the hydrogen oxide storage tank and comprises a high-pressure gas source, a gas supply branch and a gas dynamic regulating unit arranged in the gas supply branch.
The high-pressure gas source is preferably a high-pressure inert gas having a pressure of not less than 9MPa, and in this embodiment, is preferably high-pressure nitrogen.
The gas supply branch is preferably DN15 in diameter and 1.5mm in wall thickness, and is referred to as an upstream gas supply branch, and the gas supply branch between the hydrogen peroxide tank and the gas dynamic regulating unit is referred to as a downstream gas supply branch, and a high-pressure gas filter is preferably disposed on the upstream gas supply branch, in this embodiment, a nitrogen filter 14 is preferably disposed. The downstream air supply branch is preferably provided with a supercharging oneway valve 23.
The gas dynamic regulating unit comprises a main regulating branch and an auxiliary regulating branch which are arranged in parallel; the main regulating branch and the auxiliary regulating branch comprise a pressurizing valve and a pressurizing pore plate.
The main adjustment branch is preferably provided with a main pressurizing solenoid valve 19 and a main pressurizing orifice plate 21 in sequence.
The auxiliary pressure solenoid valve 20 and the auxiliary pressure orifice plate 22 are preferably arranged on the auxiliary regulating branch in sequence.
Through the structural design to main pressure boost orifice plate and supplementary pressure boost orifice plate for the pressure boost rate of main regulation branch road is slower, and the pressure boost rate of supplementary regulation branch road is faster.
The test piece hydrogen peroxide supply assembly is used for conveying the hydrogen peroxide stored in the hydrogen peroxide storage tank to the hydrogen peroxide channel in the test piece. The hydrogen peroxide in the hydrogen peroxide channel is mostly used as a propellant to carry out oxidative decomposition, and can also be partly used as a coolant to cool the engine. In addition, in order to ensure the normal operation of the hydrogen peroxide engine test piece, the inlet pressure of hydrogen peroxide in the hydrogen peroxide channel needs to be not lower than 5MPa.
The test piece hydrogen peroxide supply assembly comprises a hydrogen peroxide supply main pipe and a hydrogen peroxide flow control unit.
The hydrogen peroxide supply main located upstream of the hydrogen peroxide flow rate control unit is referred to as a hydrogen peroxide upstream supply main, and the hydrogen peroxide supply main located downstream of the hydrogen peroxide flow rate control unit is referred to as a hydrogen peroxide downstream supply main.
A hydrogen peroxide filter 3 and a hydrogen peroxide hand valve 4 are sequentially arranged on the hydrogen peroxide upstream supply main pipe.
The hydrogen peroxide downstream supply main pipe is provided with a hydrogen peroxide flowmeter 9, a hydrogen peroxide main supply air valve 11 and a hydrogen peroxide one-way valve 13 in sequence.
The hydrogen peroxide flow control unit is provided with at least two groups of flow gears; and selecting a corresponding flow gear from the hydrogen peroxide flow control unit according to the hydrogen peroxide flow required by the hydrogen peroxide channel.
The hydrogen peroxide flow control unit preferably comprises two hydrogen peroxide buses 5 and n+m supply branch pipes arranged between the two hydrogen peroxide buses in parallel; the N+M supply branch pipes comprise N small-flow supply branch pipes and M large-flow supply branch pipes; wherein the hydrogen peroxide delivery amount in each of the large-flow supply branch pipes is larger than the hydrogen peroxide delivery amount in each of the small-flow supply branch pipes at the same delivery pressure.
In the present embodiment, preferably n=m=2, the hydrogen peroxide flow control unit has eight sets of flow shift positions.
Each small-flow supply branch pipe is uniformly provided with a small-flow cavitation pipe 6 and a cavitation valve; wherein each small flow cavitation tube is preferably a 50g/s cavitation tube.
A large-flow cavitation pipe 7 and a cavitation valve are uniformly distributed on each large-flow supply branch pipe; wherein each large flow cavitation tube is a 100g/s cavitation tube.
The invention realizes the switching of eight groups of flow gears by controlling the on-off of the four cavitation valves. In this embodiment, the cavitation valve is preferably a cavitation hand valve. The cavitation hand valves corresponding to the two large-flow cavitation pipes 7 are respectively called a 1# cavitation hand valve and a 2# cavitation hand valve, and the cavitation hand valves corresponding to the two small-flow cavitation pipes are respectively called a 3# cavitation hand valve and a 4# cavitation hand valve.
The eight sets of flow gears are 50g/s, 100g/s, 200g/s, 250g/s, 300g/s, 400g/s, 450g/s and 500g/s, respectively.
The cavitation hand valve starting numbers corresponding to the eight sets of flow gear positions are shown in the following table 1.
Table 1 set values for storage tanks for gear positions
The flow rate of the cavitation tube is related to the tank pressure, so the hydrogen peroxide tank pressure (also referred to as tank pressure) can be set by a predetermined flow rate.
Cavitation tube design is referred to in general Specification for cavitation venturi of liquid rocket engines of QJ 1783A-1996.
The flow calculation formula is:
wherein: q m -atThe mass flow of the liquid under cavitation conditions, kg/s;
c, flow coefficient;
A t cavitation tube throat cross-sectional area, m 2 ；
P iv -cavitation tube inlet hydrostatic pressure, MPa;
P s -saturated vapor pressure of the liquid at local temperature conditions, MPa;
ρ iv density of liquid at inlet of cavitation tube, kg/m 3 。
At a temperature of 298.15K, a 90% hydrogen peroxide density of 1387kg/m 3 ；
At a temperature of 303.15K, the 90% hydrogen peroxide saturated vapor pressure was 665.78Pa.
The flow coefficients of the measured diameters of the throats of the cavitation tubes # 1 to # 4 and the debugging and checking of pure water are shown in the attached table 1.
Table 1 cavitation flow coefficient
| Cavitation tube serial number | Diameter of throat (mm) | Flow coefficient |
| 1# | 1.4 | 0.9336 |
| 2# | 1.395 | 0.9300 |
| 3# | 0.7 | 0.9437 |
| 4# | 0.71 | 0.9268 |
The test piece blowing unit is used for blowing out the depressurized high-pressure gas to the surface of the test piece, so that residual reaction gas products in the test piece are blown out, and the next test is ensured to be normally carried out.
The test piece blowing unit preferably includes a blowing branch, a blowing solenoid valve 18, and a blowing check valve 12. The upstream end of the purge branch pipe is preferably connected to the nitrogen gas after the end of the upstream gas supply branch pipe is depressurized, and the downstream end of the purge branch pipe is preferably connected to the hydrogen peroxide downstream supply main pipe. The blow-off solenoid valve 18 and the blow-off check valve 12 are arranged in sequence in the blow-off branch pipe.
The above-described pneumatic control unit includes a nitrogen pressure reducer 15, a hydrogen peroxide pneumatic discharge valve control solenoid valve 16, and a hydrogen peroxide main supply gas valve solenoid valve 18.
The nitrogen pressure reducer is used for reducing the pressure of the nitrogen conveyed by the upstream gas supply branch.
The hydrogen peroxide pneumatic discharge valve control solenoid valve 16 and the hydrogen peroxide main supply valve solenoid valve 18 described above are used to control the opening of the hydrogen oxide pneumatic discharge valve and the hydrogen peroxide main supply valve, respectively.
The safety monitoring unit comprises a temperature sensor and a pressure sensor.
The temperature sensor includes a hydrogen peroxide temperature sensor and a test piece temperature sensor.
The hydrogen peroxide temperature sensor is used for monitoring the temperature of the hydrogen peroxide conveyed to the test piece by the hydrogen peroxide storage tank. When the hydrogen peroxide temperature sensor detects that the outlet temperature of the hydrogen peroxide storage tank is continuously higher than 50 ℃ for 0.3s, the system automatically triggers an automatic emergency shutdown program as shown in fig. 2; meanwhile, an operator can also make an emergency, and perform manual emergency shutdown.
The test piece temperature sensor preferably has two, i.e., a low temperature test piece temperature sensor and a high temperature test piece temperature sensor, respectively. The low-temperature test piece temperature sensor is used for monitoring the hydrogen peroxide supply temperature in the hydrogen peroxide channel in the test piece. The high temperature test piece temperature sensor is preferably used to monitor the decomposition temperature of the test piece.
The pressure sensor comprises a high-pressure gas pressure sensor, a hydrogen peroxide upstream conveying pressure sensor, a hydrogen peroxide downstream conveying pressure sensor and a test piece pressure sensor.
The high-pressure gas pressure sensor is used for monitoring the pressure of high-pressure gas injected into the hydrogen oxide storage tank by the gas supply assembly.
The hydrogen peroxide upstream delivery pressure sensor is used for monitoring the hydrogen peroxide delivery pressure positioned upstream of the hydrogen peroxide flow control unit; the hydrogen peroxide downstream delivery pressure sensor is configured to monitor a hydrogen peroxide delivery pressure downstream of the hydrogen peroxide flow control unit.
When the pressure of the hydrogen peroxide storage tank is less than 0.2MPa, the blowing-off check valve can work, and the blowing-off function can be performed.
The test piece pressure sensor is used for monitoring the pressure at different positions in the test piece, preferably three, so that the reliability of the final test piece pressure is ensured.
The control box comprises a power supply module, a PLC module and a data acquisition module; the power supply module is used for supplying power to the whole system; the PLC module can collect data by the data acquisition module and control the opening and closing of each electromagnetic valve in the system; the data acquisition module is used for acquiring sensor data of the temperature sensor and the pressure sensor in the safety monitoring unit.
Table 2 flow conversion correspondence table
Test verification
In order to verify the technical problem of drift of the hydrogen peroxide supply flow due to the fluctuation of the air supplementing pressure, in this embodiment, tap water is used as the test liquid, and after the test piece is replaced by the process hand valve, flow test verification is performed.
1. Flow conversion
The eight flow rate shift positions are re-converted according to the mass ratio of tap water to hydrogen peroxide as shown in table 2.
2. Flow stability test
And 8 flow gears (namely 8 working conditions) are sequentially analyzed for the influence of the air supplement on the hydrogen peroxide flow. The analysis data is used for taking a stable section near the rated flow, and the average difference and the average percentage of the section data are calculated to display the fluctuation condition of the flow of the section, and the specific test condition is shown in table 3.
TABLE 2 steady-state flow bias statistics
The flow test curves of each gear are shown in fig. 3-9, and according to the curves, local jitter exists in the ascending process of individual gears, and the flow can be stabilized in a very high precision range after entering a stable section without obvious fluctuation. The curves in which local jitter occurs during the rising process are analyzed separately.
The small peak exists in the flow rising stage of the working condition 1 and the working condition 2, and the analysis reasons are as follows: in the test process, the process hand valve at the position of the test piece is in a full-open state and basically has no flow resistance, the main hydrogen peroxide supply valve is opened instantly, the debugging liquid in the main hydrogen peroxide downstream supply pipe at the downstream of the hydrogen peroxide flow control unit is rapidly discharged, and the small-flow cavitation pipe limits the fluid filling speed, so that the subsequent flow is rapidly reduced, and the rising section in the small-flow state is spiked. However, in the case of real media (hydrogen peroxide) tests, the process hand valve is replaced by a test piece, and such spikes will be greatly improved due to the flow resistance of the test piece, without substantially causing drift in the hydrogen peroxide supply flow rate.
The local platform exists in the rising process of the flow curves of the working conditions 3, 5, 6 and 8, and the main reason is that the system flow control depends on cavitation characteristics of the cavitation tube, but when the test is started, the cavitation tube is in a full liquid state, and the working characteristics of the cavitation tube change from the full liquid state to the entering state, so that the local platform can appear in the rising section, and the phenomenon is more obvious when the cavitation tube is connected in parallel. Therefore, in the embodiment, the number of the parallel supply branch pipes is only four, and the hydrogen peroxide supply flow caused by the local platform is reduced on the premise of meeting the use of the flow gear.
The shaking-down of the flow curve under the working condition 7 is a special phenomenon, and the evacuation operation is carried out before the test, but gas still possibly exists locally in the pipeline, and the gas is discharged along with the medium in the initial stage of the test, so that the shaking-down of the curve is caused, and the time of the evacuation (such as opening a hydrogen peroxide filling and exhausting hand valve to discharge the gas in the storage tank) is prolonged during the formal test, so that the improvement is carried out.
Through debugging, each component, the control unit, the acquisition unit and the operation interface of the hydrogen peroxide catalytic decomposition test system work normally, the air tightness of the system is good, no leakage exists, the flow rate of each propellant flow baffle reaches a design value, the flow rate is stable and has no larger fluctuation, and the upper limit value of the pressure of each propellant outlet of each baffle reaches more than the requirement (5 MPa) of a test piece. Meanwhile, the automatic emergency shutdown program, the manual emergency shutdown program and the blowing function of the system work normally, and the test safety requirement is met. In conclusion, each function of the system works normally, and the test requirement is met.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the equivalent changes belong to the protection scope of the present invention.
Claims (10)
1. A hydrogen peroxide decomposition test system with controllable flow rate is characterized in that: the device comprises a hydrogen peroxide storage tank, an air supply assembly, a storage tank hydrogen peroxide filling assembly, a storage tank debugging liquid supply assembly and a test piece hydrogen peroxide supply assembly;
the gas supply assembly is used for injecting high-pressure gas into the hydrogen oxide storage tank;
the hydrogen peroxide filling component of the storage tank is used for filling hydrogen peroxide into the hydrogen oxide storage tank;
the tank debugging liquid supply assembly is used for injecting debugging liquid into the hydrogen oxide tank;
the test piece hydrogen peroxide supply assembly is used for conveying the hydrogen peroxide stored in the hydrogen peroxide storage tank to a hydrogen peroxide channel in the test piece;
the test piece hydrogen peroxide supply assembly comprises a hydrogen peroxide flow control unit, wherein the hydrogen peroxide flow control unit is provided with at least two groups of flow gears; and selecting a corresponding flow gear from the hydrogen peroxide flow control unit according to the hydrogen peroxide flow required by the hydrogen peroxide channel.
2. The controlled flow hydrogen peroxide decomposition test system of claim 1, wherein: the hydrogen peroxide flow control unit comprises two hydrogen peroxide buses and N+M supply branch pipes which are arranged between the two hydrogen peroxide buses in parallel; the N+M supply branch pipes comprise N small-flow supply branch pipes and M large-flow supply branch pipes; wherein the hydrogen peroxide delivery amount in each of the large-flow supply branch pipes is larger than the hydrogen peroxide delivery amount in each of the small-flow supply branch pipes at the same delivery pressure.
3. The controlled flow hydrogen peroxide decomposition test system of claim 2, wherein: n=m=2, the hydrogen peroxide flow control unit has eight sets of flow gears.
4. A controlled flow hydrogen peroxide decomposition test system according to claim 3, wherein: each small-flow supply branch pipe is uniformly provided with a small-flow cavitation pipe and a cavitation valve; a large-flow cavitation tube and a cavitation valve are uniformly distributed on each large-flow supply branch pipe; the switching of eight groups of flow gears is further realized through the on-off control of the four cavitation valves.
5. The controlled flow hydrogen peroxide decomposition test system of claim 4, wherein: each small-flow cavitation tube is a 50g/s cavitation tube, and each large-flow cavitation tube is a 100g/s cavitation tube; the eight sets of flow gears are 50g/s, 100g/s, 200g/s, 250g/s, 300g/s, 400g/s, 450g/s and 500g/s, respectively.
6. The controlled flow hydrogen peroxide decomposition test system of claim 1, wherein: the gas supply assembly comprises a high-pressure gas source, a gas supply branch and a gas dynamic regulating unit arranged in the gas supply branch;
the gas dynamic regulating unit comprises a main regulating branch and an auxiliary regulating branch which are arranged in parallel; the main regulating branch and the auxiliary regulating branch comprise a pressurizing valve and a pressurizing pore plate.
7. The controlled flow hydrogen peroxide decomposition test system of claim 1, wherein: the safety monitoring unit comprises a temperature sensor and a pressure sensor;
the temperature sensor comprises a hydrogen peroxide temperature sensor and a test piece temperature sensor; the hydrogen peroxide temperature sensor is used for monitoring the temperature of the hydrogen peroxide conveyed to the test piece by the hydrogen peroxide storage tank; the test piece temperature sensor can be used for monitoring the hydrogen peroxide supply temperature in the hydrogen peroxide channel in the test piece;
the pressure sensor comprises a high-pressure gas pressure sensor, a hydrogen peroxide upstream conveying pressure sensor, a hydrogen peroxide downstream conveying pressure sensor and a test piece pressure sensor; the high-pressure gas pressure sensor is used for monitoring the pressure of high-pressure gas injected into the hydrogen oxide storage tank by the gas supply assembly; the hydrogen peroxide upstream delivery pressure sensor is used for monitoring the hydrogen peroxide delivery pressure positioned upstream of the hydrogen peroxide flow control unit; the hydrogen peroxide downstream delivery pressure sensor is configured to monitor a hydrogen peroxide delivery pressure downstream of the hydrogen peroxide flow control unit.
8. The controlled flow hydrogen peroxide decomposition test system of claim 1, wherein: the high-pressure gas injected into the hydrogen oxide storage tank by the gas supply component is nitrogen; the concentration of the hydrogen peroxide injected into the hydrogen oxide storage tank by the storage tank hydrogen peroxide filling component is 90 percent; the tank debugging liquid supply assembly is used for injecting the debugging liquid into the hydrogen oxide tank into the tank.
9. The controlled flow hydrogen peroxide decomposition test system of claim 1, wherein: the device also comprises a test piece blowing unit; the test piece blowing unit is used for blowing the depressurized high-pressure gas to the surface of the test piece.
10. The controlled flow hydrogen peroxide decomposition test system of claim 1, wherein: also comprises a hydrogen peroxide discharge unit; the hydrogen peroxide discharging unit comprises a hydrogen peroxide discharging main pipe and a hydrogen peroxide discharging auxiliary pipe; the hydrogen peroxide discharge main pipe can discharge hydrogen peroxide in the hydrogen peroxide storage tank; the hydrogen peroxide discharge auxiliary pipe can discharge hydrogen peroxide between the hydrogen peroxide flow rate control unit and the test piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310174025.2A CN116296410A (en) | 2023-02-28 | 2023-02-28 | Hydrogen peroxide decomposition test system with controllable flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310174025.2A CN116296410A (en) | 2023-02-28 | 2023-02-28 | Hydrogen peroxide decomposition test system with controllable flow |
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| CN116296410A true CN116296410A (en) | 2023-06-23 |
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| CN202310174025.2A Pending CN116296410A (en) | 2023-02-28 | 2023-02-28 | Hydrogen peroxide decomposition test system with controllable flow |
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- 2023-02-28 CN CN202310174025.2A patent/CN116296410A/en active Pending
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