CN112903281A - Combination valve test pipeline and system - Google Patents
Combination valve test pipeline and system Download PDFInfo
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Abstract
The invention belongs to the technical field of valve tests, and discloses a combined valve test pipeline and a system, wherein the system comprises a mechanical system and a test control system, the mechanical system is used for providing a gas medium, a temperature environment and working condition for a tested valve, and the test control system is used for controlling the gas medium, the temperature environment and the working condition and is also used for automatically acquiring and storing test parameters; the mechanical system comprises a gas pressurization and purification unit, a gas circuit detection unit, a high-low temperature box and a flow simulation unit; the gas pressurizing and purifying unit is used for removing oil, removing water and pressurizing gas media; the gas path detection unit is used for storing and releasing a gas medium and clamping and fixing a tested valve; the high-low temperature box is used for providing a high-temperature environment or a low-temperature environment for the tested valve and the gas medium at the same time; the flow simulation unit is used for simulating the working condition of the valve when the flow is different.
Description
Technical Field
The invention belongs to the technical field of valve tests, and particularly relates to a combined valve test pipeline and a combined valve test system.
Background
The existing valve testing system only meets the characteristics of adjustable environment temperature and single load, but cannot meet the working conditions of synchronous adjustment of the environment temperature and the medium temperature and the working conditions of multi-load and time sequence load.
In the actual flight process of various aerospace valves, such as weapon valves, the environmental temperature and the medium temperature both synchronously change along with the external temperature change, and the actual working condition of the valve cannot be comprehensively verified only by simply simulating the environmental temperature or the medium temperature; in addition, the load borne by the valve in the actual flight process can change along with the influence of the actual working conditions such as the current flight speed, attitude adjustment and airflow characteristics, and the simulation of a single load test is not enough to truly verify the actual working conditions of the valve.
Disclosure of Invention
The invention aims to provide a combined valve testing pipeline and a system, which are used for solving the problem that a valve performance testing system is lacked in the prior art.
In order to realize the task, the invention adopts the following technical scheme:
a combined valve test pipeline comprises a gas pressurization purification pipeline and a gas circuit detection pipeline which are sequentially connected, wherein a valve to be tested is arranged on the gas circuit detection pipeline, an inlet of the gas pressurization purification pipeline is connected with a gas source, the combined valve test pipeline also comprises a flow simulation pipeline, and the gas circuit detection pipeline is arranged in a high-low temperature box;
the flow simulation pipeline adopts a plurality of groups of orifice plates or electronic flowmeters which are connected in parallel, the diameter of each group of orifice plates is different, and the measuring range of each group of electronic flowmeters is different;
the gas pressurizing and purifying pipeline comprises a first gas path and a second gas path, the first gas path is connected with a first gas source through an air compressor, the first gas path is connected with a first pressurizing branch pipe and a second pressurizing branch pipe through a filter, the first pressurizing branch pipe and the second pressurizing branch pipe are respectively connected with a pressure reducing valve, the first pressurizing branch pipe is used for supplying gas to all gas control stop valves on a gas path detection pipeline and a flow simulation pipeline, the second pressurizing branch pipe is connected with an input end of a booster pump, the second gas path is connected with a second gas source through a gas drier, the second gas path is connected with a third pressurizing branch pipe and a fourth pressurizing branch pipe through a filter, the third pressurizing branch pipe is connected with an input end of the booster pump, the fourth pressurizing branch pipe is connected with an output end of the booster pump, and the output end of the pressure reducing valve is connected with an inlet of the;
the gas path detection pipeline comprises two high-pressure gas cylinders connected in parallel, a tested valve is arranged behind the two high-pressure gas cylinders connected in parallel, and one high-pressure gas cylinder is connected behind the tested valve and then connected with an inlet of the flow simulation pipeline.
Furthermore, the gas circuit detection pipeline is provided with pressure gauges at the inlet and the outlet of the tested valve, and a thermometer at the outlet of the tested valve.
A combined valve test system comprises a mechanical system and a test and control system, wherein the mechanical system is used for providing a gas medium, a temperature environment and working condition for a tested valve, and the test and control system is used for controlling the gas medium, the temperature environment and the working condition and is also used for automatically acquiring and storing test parameters;
the mechanical system comprises a gas pressurization and purification unit, a gas circuit detection unit, a high-low temperature box and a flow simulation unit; the gas pressurizing and purifying unit is used for removing oil, removing water and pressurizing gas media; the gas path detection unit is used for storing and releasing a gas medium and clamping and fixing a tested valve; the high-low temperature box is used for providing a high-temperature environment or a low-temperature environment for the tested valve and the gas medium at the same time; the flow simulation unit is used for simulating the working condition of the valve when the flow is different.
Further, a safe discharge system is arranged at an outlet of the gas pressurization and purification unit and an inlet of the high-low temperature tank, and comprises a safety valve, a pneumatic control unloading valve and a pressure sensor; the safety valves are arranged at the outlet of the booster pump and the outlet of the high-pressure gas cylinder, the pneumatic control unloading valves are arranged at the outlet of the high-pressure gas cylinder, the inlet of the tested valve and the outlet of the tested valve, and the upstream of each unloading valve is provided with a pressure sensor.
Furthermore, the measurement and control system comprises a working condition adjusting subsystem and a time sequence acquisition control subsystem, wherein the working condition adjusting subsystem is used for controlling the gas pressurization system and the high-low temperature tank to establish proper working condition for the valve to be measured; the time sequence acquisition control subsystem is used for controlling a test time sequence and automatically acquiring, storing and processing pressure and temperature.
Furthermore, the working condition adjusting subsystem adjusts the working condition or monitors the safety of the field control valve and the safety interlocking device through the programmable controller; the time sequence acquisition control subsystem is mainly used for acquiring, storing and processing parameters of the field sensor through the cDAQ controller and storing the valve time sequence through the cDAQ controller.
Compared with the prior art, the invention has the following technical characteristics:
(1) the test system is mainly used for testing the test types such as the flow characteristic, the pressure characteristic, the air flow resistance characteristic and the like of the aerospace valve, and can meet the test requirements under different environmental temperatures, different medium temperatures, different pressures and different load working conditions.
(2) The system adopts a modular design, simplifies the system structure, and each module is independent, can be used in combination and can also be used for other purposes in a laboratory.
(3) The output pressure of the system is high and can reach 45 MPa; the main pipeline 3/4' has an inner drift diameter of 11.13mm, can realize the working condition of ultrahigh pressure and large flow,
(4) the double gas cylinders are connected in parallel and controlled independently, and the gas cylinders are freely combined and used according to the test type, so that the utilization rate of the test medium is improved;
(5) the high-low temperature box is configured, the gas detection unit can be integrally placed in the box body, and synchronous simulation of a test medium and a test environment can be realized;
(6) the multi-test mode is parallel, three groups of pore plates, high-pressure electromagnetic valves, ER5000 electronic pressure reducers and PLC + CDAQ measurement and control platforms are configured, and the pressure characteristic test, the flow characteristic test and the time sequence test of the tested valve and all tests under high and low temperature working conditions can be realized;
(7) the measurement and control system adopts a firm and reliable CFP module and an industrial personal computer, and the measurement precision is superior to 0.5 percent.
(8) The advanced and mature hardware products at home and abroad are selected and provided with the signal conditioning module with widely applicable objects, so that the anti-interference capability and reliability of the test system are effectively improved, and the stability of the system is greatly improved.
(9) The automatic test greatly reduces the test time, and the data result and the curve can be directly seen on the screen after the test is finished.
Drawings
FIG. 1 is a functional block diagram of a combination valve testing system;
FIG. 2 is a schematic structural diagram of a gas pressurizing and purifying unit;
FIG. 3 is a schematic structural diagram of a gas path detection unit;
FIG. 4 is a schematic structural diagram of a flow simulation unit;
FIG. 5 is a schematic diagram of a measurement and control system.
The reference numbers in the drawings have the meanings given below:
1-air compressor, 2-air bottle, 3-gas drier, 4-filter, 5-high pressure gas bottle, 6-orifice plate I, 7-orifice plate II, 8-orifice plate III and 9-tested combination valve.
A stop valve: KV 11-KV-19, KV21, KV22, KV31, KV44 and KV 34; b-a pressure gauge; a P-pressure sensor; a T-thermometer; a battery valve: DC 11-DC 14, DC 31-DC 34; a pressure reducing valve: j01, J11, J12, electronic pressure reducer: DJ 11; m-dry booster pump, check valve: DX11, DX 12; a pneumatic stop valve: QV11, QV21, QV31, QV 32; a safety valve: a11 and A31.
Detailed Description
Firstly, explaining the technical vocabulary appearing in the scheme:
a combination valve: the valve is a combination of one or more aerospace valves, and the aerospace valves comprise pressure reducing valves, safety valves, electromagnetic valves and the like.
Orifice plate: the detecting element is installed in the closed pipeline and measures the gas flow according to the principle of a throttling device. The pore plates of the invention are all round pore plates.
Testing the performance of the valve: and testing the flow characteristic, the pressure characteristic, the air flow resistance characteristic and the like of the aerospace valve. In this scheme, combination valve test system can be used for the pressure characteristic test and the flow characteristic test under the high low temperature operating mode of relief valve, the opening pressure test under the high low temperature operating mode of relief valve, the flow characteristic test and the air flow resistance test under the high low temperature operating mode of solenoid valve and the flow characteristic test and the air flow resistance test under the high low temperature operating mode of flow regulator etc..
The embodiment discloses a combined valve test pipeline, which comprises a gas pressurization purification pipeline and a gas circuit detection pipeline which are sequentially connected, wherein a valve to be tested is arranged on the gas circuit detection pipeline, an inlet of the gas pressurization purification pipeline is connected with a gas source, the combined valve test pipeline also comprises a flow simulation pipeline, and the gas circuit detection pipeline is arranged in a high-low temperature box;
the flow simulation pipeline adopts a plurality of groups of orifice plates which are connected in parallel, the diameters of each group of orifice plates are different, and the orifice plates with different diameters can simulate the flow under different working conditions;
the gas pressurizing and purifying pipeline comprises a first gas path and a second gas path, the first gas path is connected with a first gas source through an air compressor, the first gas path is connected with a first pressurizing branch pipe and a second pressurizing branch pipe through a filter, the first pressurizing branch pipe and the second pressurizing branch pipe are respectively connected with a pressure reducing valve, the first pressurizing branch pipe is used for supplying gas to all gas control stop valves on a gas path detection pipeline and a flow simulation pipeline, the second pressurizing branch pipe is connected with an input end of a booster pump, the second gas path is connected with a second gas source through a gas drier, the second gas path is connected with a third pressurizing branch pipe and a fourth pressurizing branch pipe through a filter, the third pressurizing branch pipe is connected with an input end of the booster pump, the fourth pressurizing branch pipe is connected with an output end of the booster pump, and the output end of the pressure reducing valve is connected with an inlet of the;
the gas path detection pipeline comprises two high-pressure gas cylinders connected in parallel, a tested valve is arranged behind the two high-pressure gas cylinders connected in parallel, and one high-pressure gas cylinder is connected behind the tested valve and then connected with an inlet of the flow simulation pipeline.
Specifically, the gas circuit detection pipeline is provided with pressure gauges at the inlet and the outlet of the tested valve, and a thermometer at the outlet of the tested valve.
The embodiment discloses a combined valve testing system which comprises a mechanical system and a measurement and control system, wherein the mechanical system is used for providing a gas medium, a temperature environment and working conditions for a tested valve, and the measurement and control system is used for controlling the gas medium, the temperature environment and the working conditions and is also used for automatically acquiring and storing test parameters;
the mechanical system comprises a gas pressurization and purification unit, a gas circuit detection unit, a high-low temperature box and a flow simulation unit;
the gas pressurizing and purifying unit is used for removing oil, removing water and pressurizing gas media;
the gas path detection unit is used for storing and releasing a gas medium and clamping and fixing a tested valve;
the high-low temperature box is used for providing a high-temperature environment or a low-temperature environment for a tested valve and a gas medium;
the flow simulation unit is used for simulating the working condition of the valve when the flow is different.
Specifically, gaseous pressure boost purifies the unit and includes air source, nitrogen gas source, gaseous desicator and dry-type booster pump and electron pressure reducer, dry-type booster pump is connected to the air source, the nitrogen gas source connects the gaseous desicator earlier then connects dry-type booster pump, electron pressure reducer is connected to dry-type booster pump's output, high-low temperature box is connected to the electron pressure reducer. The gas drier is adopted to remove oil and water from the gas source, purify the dew point of the gas to-70 ℃, and the gas drier is adopted to purify the gas, so that the influence of valve clamping and pipeline icing on the test effect during a low-temperature test can be prevented; two sources (an air source and a nitrogen source) are arranged for meeting the test medium requirements of different products; the pressure is increased and then reduced, so that the pressure adjusting precision can be improved, and the stable adjustment is realized.
Specifically, the gas path detection unit is arranged in the high-low temperature box and comprises two high-pressure gas cylinders which are connected in parallel. The double gas cylinders are connected in parallel and controlled independently, the gas cylinders can be freely combined and used according to test types, and the utilization rate of test media is improved. The gas circuit detection unit is arranged in the high-low temperature box, and can realize synchronous simulation of a test medium and a temperature environment. And a safety control valve QV is arranged behind the high-pressure gas cylinder and is used for controlling the opening and closing degree of the gas cylinder.
Specifically, the flow simulation unit adopts a plurality of groups of orifice plates connected in parallel, and the orifice density of the orifice plates which are not arranged in the group is different, so that the working conditions of different kinds of flow are simulated.
Specifically, the high-low temperature box comprises a box body and a water chilling unit, the box body of the high-low temperature box is placed in a test room, the total mass is 2.2 tons (no load), and the external dimension is 3300mm multiplied by 1500mm multiplied by 2200mm (length multiplied by width multiplied by height). The water chilling unit is placed in the basement, and the water chilling unit and the basement are connected through the PVC pipe.
Specifically, a complete safety discharge system is arranged at the outlet of the gas pressurization purification unit and the inlet of the high-low temperature tank (namely a medium high-pressure part), safety valves are arranged at the outlet of the pressurization pump and the outlet of the gas cylinder, the safety valves are of mechanical structures, the medium high pressure and a pressure regulating spring of the safety valves form a balance force, and once the medium pressure exceeds a set pressure, the safety valves immediately discharge air and unload; meanwhile, pneumatic control unloading valves are arranged at the outlet of the high-pressure gas cylinder, the inlet of a tested product and the outlet of the tested product, a pressure sensor is arranged at the upstream of the unloading valve and is interlocked with the PLC control system in real time, once the pressure exceeds the set pressure, the control system triggers an unloading instruction to the unloading valve, and the unloading valve is opened immediately to release the pressure until the pressure is safe.
The measurement and control system comprises a working condition adjusting subsystem and a time sequence acquisition control subsystem, wherein the working condition adjusting subsystem is mainly responsible for completing control of the gas pressurization system and the high-low temperature box and establishing proper working condition for a measured piece; the time sequence acquisition control subsystem is mainly responsible for completing the control of a test time sequence (realizing the function of the flow simulation unit and the performance simulation of a tested piece), and meanwhile, automatically acquiring, storing, processing data and the like of test parameters (pressure and temperature). The data processing comprises generating a pressure curve, judging valve response time, evaluating test data stability, performing data Fourier transform and the like;
specifically, the measurement and control system comprises a PLC, an acquisition controller, an upper computer, a signal conditioning module, a direct current power supply, an electromagnetic valve driving module and other components, is used for controlling an electromagnetic valve, a pneumatic control valve, an electronic pressure reducer and a tested valve in a pipeline system, and is used for acquiring and recording pressure, temperature and dew point signals;
the measurement and control system mainly comprises a control system and an acquisition system, wherein the control system mainly adjusts the working condition or monitors the safety of an on-site control valve (ER5000 electronic pressure reducer, a pneumatic control stop valve, an electromagnetic valve), a safety interlocking device (a pressure sensor) and the like through a Programmable Logic Controller (PLC); the testing system mainly collects, stores and processes parameters (temperature sensors, pressure sensors and valve position states) of the field sensors through the cDAQ controller.
The measurement and control system has the working principle that:
(1) gas pressurization purification unit: when the test is started, firstly, an AO channel of a PLC controller designates output pressure for a proportional pressure reducing valve, and simultaneously, the pressure measured by a pressure digital display meter is read back through an AI channel; the linkage control of two pressure relief electromagnetic valves in the system is connected to corresponding pressure digital display meter control points, and meanwhile, the pressure digital display meter control points are connected with a drive module and a manual switch controlled by a PLC (programmable logic controller), so that the linkage protection of pressure overrun is realized. Wherein the gas pressurizing unit can work independently of the measurement and control system.
(2) Gas circuit detecting element, flow analog unit: the pressure transmitter, the dynamic pressure sensor and the temperature measuring thermocouple are connected into a signal conditioning module in the measuring main equipment, the signal conditioning module outputs standard voltage signals which are collected by a cDAQ module, the standard voltage signals enter an industrial personal computer after A/D conversion, and a test software system processes, displays and stores data. The valve timing sequence is stored in the cDAQ controller, the cDAQ controller can be called and modified before the test, and the cDAQ controller finishes the control of the specific set timing sequence of the valve in the test process.
Example 1
The embodiment discloses a combination valve test pipeline, and on the basis of the embodiment, the following technical characteristics are also disclosed:
a stop valve: KV 11-KV-19, KV21, KV22, KV31, KV44 and KV 34; b-a pressure gauge; a P-pressure sensor; a T-thermometer; a battery valve: DC 11-DC 14, DC 31-DC 34; a pressure reducing valve: j01, J11, J12, J13; electronic pressure reducers: DJ 11; m-dry booster pump, check valve: DX11, DX 12; a pneumatic stop valve: QV11, QV21, QV31, QV 32; a safety valve: a11 and A31.
In the gas pressurization purification pipeline, a first gas path comprises an air compressor 1, an air bottle 2, a stop valve KV18 and a filter 4 which are sequentially connected in series, a reducing valve J11, a J13, a pressure gauge B12, a pressure sensor P12 and an electromagnetic valve DC14 are sequentially connected in series on a first pressurization branch pipe, a stop valve KV16 is connected in parallel on the electromagnetic valve DC14, a reducing valve J12, a pressure gauge B13, a pressure sensor P13 and an electromagnetic valve DC13 are sequentially connected in series on a second pressurization branch pipe, a stop valve KV17 is connected in parallel on the electromagnetic valve DC13, a second gas path is connected with a nitrogen source and is sequentially connected in series with a stop valve KV19, a gas dryer 3, a stop valve 11 and a filter 4, a pressure gauge B11, a pressure sensor P11 and an electromagnetic valve DC11 are connected on a third pressurization branch pipe, a stop valve KV12 is connected in parallel on the electromagnetic valve DC11, a fourth pressurization branch pipe is connected with an electromagnetic valve DC 12;
an outlet of the booster pump M is sequentially connected with a check valve DX11, a pressure sensor P14, a pressure gauge B14, a stop valve KV14, a pressure sensor P15 and a filter 4 in series, the stop valve KV14 is connected with an electronic pressure reducer DJ11 in parallel, and DJ11 is connected with a first booster branch pipe.
The gas circuit detection pipeline comprises two parallel high-pressure gas cylinders 5, a stop valve KV21 and a stop valve KV22 are arranged in front of each high-pressure gas cylinder 5 respectively, the rear of each high-pressure gas cylinder is connected with a combination valve to be detected through a pneumatic stop valve QV21, the rear of the combination valve to be detected is connected with an outlet through one high-pressure gas cylinder 5, a pressure gauge is arranged at an input/output port of each valve in the combination valve to be detected respectively, and a thermometer and a pressure gauge are arranged at an outlet of the gas cylinder and an outlet.
The flow simulation pipeline comprises three paths of parallel pore plates I, II and III, namely 6, 7 and 8 in the graph 4, electromagnetic valves DC31, DC32 and DC33 and pressure sensors P31, P32 and P33 are arranged in front of each path of pore plate respectively.
Example 2
The embodiment discloses a combination valve testing system, and on the basis of the embodiment, the following technical characteristics are also disclosed:
the gas pressurization purification unit adopts a gas dryer to remove oil and water through gas of a gas source, purifies the dew point of the gas to-70 ℃, adopts a dry booster pump to boost the nitrogen (10-35 MPa) of the gas source to 45MPa, has the pressure control precision of +/-0.5 MPa, provides a control gas source (0-0.6 MPa) for the system all the way, is integrally skid-mounted, is provided with a movable caster, and can be conveniently moved.
The pressurizing and purifying unit shares two paths of gas source input (nitrogen and air) and the pressure is 10-35 MPa; two paths of outputs, wherein one path is a low-pressure output path, the output pressure is 0-1 MPa, the medium is air, the drift diameter is 10mm, the filtering precision is 10 microns, the air source is mainly used for a system control air source, and the air source is mainly used for driving field pneumatic components and comprises an air-driven booster pump, an ER5000 electronic pressure reducer, an air-controlled stop valve and the like; the other path is a high-pressure output path, and the output pressure is as follows: 0-45 MPa, nitrogen, 10 mu m of filtering precision, and adopting a proportional pressure reducing valve to carry out secondary pressure reduction, wherein the pressure control precision can reach +/-0.1 MPa.
The gas circuit detection unit comprises 2 high-pressure gas cylinders (20L multiplied by 2, 45MPa), a high-pressure stop valve, a gas control stop valve, a buffer tube, a pressure taking port, a gas inlet and outlet, a pressure sensor, a temperature sensor, a gas circuit detection unit module, a skid-mounted movable trundle and a movable trundle, and can be conveniently moved.
The main parameters of the gas circuit detection unit are as follows:
1) the volume of the gas cylinder is 20L, 2 gas cylinders are provided, the design pressure is 45MPa, and the safety coefficient is 3 times of the working pressure.
2) The high-pressure working pressure and the low-pressure working pressure are respectively 45MPa and 4MPa, and the drift diameters of the front pipeline and the rear pipeline of the tested pressure reducing valve are respectively 11.13mm and 12mm (stainless steel 316);
3) the working environment temperature of the gas circuit detection unit is-60-100 ℃; parameter data such as pressure data, temperature data and the like in the test process are detected by corresponding sensors;
4) working pressure range: the inlet pressure measuring range is 60MPa, the primary outlet pressure measuring range is 25MPa, the pilot valve pressure and pressure reducing valve outlet pressure measuring range is 6.4MPa, the precision is +/-0.25%, and the sampling frequency is more than 10 kHz;
5) the gas circuit detection unit is movable, and the tested components, the test pipeline and the like are convenient, reliable and safe to install, and the installation structure is compact. The connection with the product adopts a universal ball head connection form (60 degrees), and the internal pipeline of the device adopts a high-pressure clamping sleeve form (20000 psi).
The high-low temperature box mainly provides high-low temperature environment for a tested piece and a gas medium, and realizes the control and regulation of the environment temperature, the effective volume of the high-low temperature box is 1400 multiplied by 1200 multiplied by 1600mm, the volume of a combination valve gas circuit detection unit is enough to be accommodated, and the temperature control range is as follows: the temperature is 60 ℃ below zero to 100 ℃, and the refrigeration rate is 2 ℃/min; temperature control accuracy: the +/-2.5 ℃ temperature and the inner cavity are made of stainless materials, and the explosion-proof function is achieved.
The flow simulation unit adopts three groups of orifice plates which are connected in parallel to simulate three flow working conditions. Static, dynamic and pulsating responses under different flow states are realized through the control of the electromagnetic valve; the system mainly comprises an electromagnetic valve, a pore plate, a pressure sensor, a temperature sensor and the like.
The response form of the system in three states is as follows:
1) static response: closing all the electromagnetic valves, keeping no air flow state after the tested valve, and observing the response curve of the pressure of each measuring point of the tested valve;
2) dynamic response: selecting a certain flow point, opening a corresponding electromagnetic valve (the opening time is less than 100ms), and observing a transient response curve of the pressure of each measuring point of the tested valve;
3) impulse response: and according to the preset pulsation characteristic, opening/closing some electromagnetic valves at intervals in sequence or opening/closing some electromagnetic valves at intervals in sequence, and observing the response curve of the pressure of each measuring point of the tested valve.
The main functions and parameters of the gas circuit detection unit are as follows:
1) the method is mainly used for simulating the flow change of the pressure reducing valve.
2) The caliber of the matched electromagnetic valve DN12mm is far larger than that of the matched orifice plate
Twice of;
3) the working pressure of the matched electromagnetic valve is 10 MPa;
4) the working voltage of the matched electromagnetic valve is 24 VDC;
5) the matched electromagnetic valve works and responds as follows: about 80 ms;
6) the pressure bearing capacity of the whole unit is not less than 10 MPa;
7) the hole plate assemblies with three calibers can be connected respectively;
8) the inlet drift diameter of the flow simulation unit is DN 12.
The effective volume of the high-low temperature box is 1400 multiplied by 1200 multiplied by 1600mm, which is enough to accommodate the volume of the combination valve air circuit detection unit, and the temperature control range is as follows: the temperature is 60 ℃ below zero to 100 ℃, and the refrigeration rate is 2 ℃/min; temperature control accuracy: the +/-2.5 ℃ temperature, the inner cavity is made of stainless materials, a 12mm thick protective steel plate is arranged in the inner cavity, and the explosion-proof function is achieved.
The main technical parameters of high temperature and low temperature are as follows:
1) temperature fluctuation degree: not more than plus or minus 0.5 ℃ (no load);
2) temperature uniformity: not more than plus or minus 2 ℃ (no load);
3) temperature gradient at static state: 0.5 ℃/min, and the temperature change rate is not more than 3 ℃/min during the test;
4) the temperature change curve is automatically recorded in the temperature rise and fall process and can be played back;
5) the side surface is provided with a pressure taking hole and an air inlet and exhaust channel;
6) the total mass of the high-low temperature box is as follows: about 2.2 tons at no load and about 3 tons at load; the outer dimensions are 3300mm × 1500mm × 2200mm (length × width × height).
Example 3
In this embodiment, four types of tests of the combination valve testing system at normal temperature, high temperature, low temperature and time sequence are disclosed, and the results are as follows:
the test parameters of the normal temperature test are as follows: the tested valve model DHF-1 is tested, the highest test pressure is 35MPa, the temperature is normal temperature (about 15 ℃), the diameter of the pore plate I is 4.73mm, the inlet pressure collection points are set to be 35MPa and 34MPa … … 3MPa, the outlet pressure corresponding to each set point is collected, and the test data are as shown in the following table 1:
TABLE 1 Normal temperature test data sheet
The test parameters for the low temperature test are as follows: the tested valve model is DHF-1, the highest test pressure is 35MPa, the temperature is-45 ℃, the heat preservation time is 2 hours, the diameter of the pore plate I is 4.73mm, the inlet pressure collection points are set to be 25MPa and 24MPa … … 4MPa, the outlet pressure corresponding to each set point is collected, and the test data are shown in the following table 2.
TABLE 2 Low temperature test data sheet
The test parameters of the high temperature test are as follows: the tested valve model is DHF-1, the highest test pressure is 35MPa, the temperature is 75 ℃, the heat preservation time is 2 hours, the diameter of the pore plate is 4.73mm, the inlet pressure collection points are set to be 39MPa and 38MPa … … 4MPa, the outlet pressure corresponding to each set point is collected, and the test data are shown in the following table 3.
TABLE 3 high temperature test data sheet
The experimental parameters of the time series test are as follows: the tested valve model DHF-1 is tested at the highest test pressure of 35MPa and the temperature of normal temperature (about 15 ℃), the diameter of the pore plate I is 4.73mm, the diameter of the pore plate II is 4.7mm, the diameter of the pore plate III is 5.6mm, the three groups of pore plates are opened according to the following time sequence, the inlet pressure collection points are set to be 35MPa and 34MPa … … 4MPa, the outlet pressure corresponding to each set point is collected, and the test data are shown in the following table 4.
TABLE 4 time series test data sheet
According to the tests of the 4 test types, the test system can meet the pressure characteristic tests of the reference valve under the conditions of normal temperature, high temperature, low temperature and time sequence of environment and medium, meets the design initial intention, meanwhile, the data are subjected to stability evaluation, when the significance level alpha is 0.05, the data of each sample conform to normal distribution through normal state test, the variance and the mean value have no significant difference through test, the test data can be considered to belong to the same normal matrix, the requirements of the standard (Q/Tm 611-96) hydraulic test system stability evaluation method are met, and the test system can be judged to be stable.
Claims (7)
1. A combined valve test pipeline comprises a gas pressurization purification pipeline and a gas circuit detection pipeline which are sequentially connected, wherein a valve to be tested is arranged on the gas circuit detection pipeline, and an inlet of the gas pressurization purification pipeline is connected with a gas source;
the gas pressurizing and purifying pipeline comprises a first gas path and a second gas path, the first gas path is connected with a first gas source through an air compressor, the first gas path is connected with a first pressurizing branch pipe and a second pressurizing branch pipe through a filter, the first pressurizing branch pipe and the second pressurizing branch pipe are respectively connected with a pressure reducing valve, the first pressurizing branch pipe is used for supplying gas to all gas control stop valves on a gas path detection pipeline and a flow simulation pipeline, the second pressurizing branch pipe is connected with an input end of a booster pump, the second gas path is connected with a second gas source through a gas drier, the second gas path is connected with a third pressurizing branch pipe and a fourth pressurizing branch pipe through a filter, the third pressurizing branch pipe is connected with an input end of the booster pump, the fourth pressurizing branch pipe is connected with an output end of the booster pump, and the output end of the pressure reducing valve is connected with an inlet of the;
the gas circuit detection pipeline is arranged in the high-low temperature box and comprises two high-pressure gas cylinders connected in parallel, a tested valve is arranged behind the two high-pressure gas cylinders connected in parallel, one high-pressure gas cylinder is connected behind the tested valve, and then the gas circuit detection pipeline is connected with an inlet of the flow simulation pipeline.
2. The combination valve test circuit of claim 1, wherein the gas circuit detection circuit is provided with pressure gauges at the inlet and outlet of the tested valve, and a temperature gauge at the outlet of the tested valve.
3. The combination valve test circuit of claim 1, wherein the orifice plate is replaceable with electronic flow meters, and wherein the range of each set of electronic flow meters is different.
4. A combined valve test system is characterized by comprising a mechanical system and a test and control system, wherein the mechanical system is used for providing a gas medium, a temperature environment and working conditions for a tested valve, and the test and control system is used for controlling the gas medium, the temperature environment and the working conditions and is also used for automatically acquiring and storing test parameters;
the mechanical system comprises a gas pressurization and purification unit, a gas circuit detection unit, a high-low temperature box and a flow simulation unit; the gas pressurizing and purifying unit is used for removing oil, removing water and pressurizing gas media; the gas path detection unit is used for storing and releasing a gas medium and clamping and fixing a tested valve; the high-low temperature box is used for providing a high-temperature environment or a low-temperature environment for the tested valve and the gas medium at the same time; the flow simulation unit is used for simulating the working condition of the valve when the flow is different.
5. The combination valve test system of claim 4, wherein a safety exhaust system is arranged at the outlet of the gas pressurization purification unit and the inlet of the high-temperature and low-temperature tank, and comprises a safety valve, a pneumatic control unloading valve and a pressure sensor; the safety valves are arranged at the outlet of the booster pump and the outlet of the high-pressure gas cylinder, the pneumatic control unloading valves are arranged at the outlet of the high-pressure gas cylinder, the inlet of the tested valve and the outlet of the tested valve, and the upstream of each unloading valve is provided with a pressure sensor.
6. The combination valve test system of claim 4, wherein the measurement and control system comprises a working condition adjusting subsystem and a time sequence acquisition control subsystem, wherein the working condition adjusting subsystem is used for controlling the gas pressurization system and the high-low temperature tank to establish proper working condition for the tested valve; the time sequence acquisition control subsystem is used for controlling a test time sequence and automatically acquiring, storing and processing pressure and temperature.
7. The combination valve test system of claim 6, wherein the condition adjustment subsystem performs condition adjustment or safety monitoring on the field control valve and the safety interlock via the programmable controller; the time sequence acquisition control subsystem is mainly used for acquiring, storing and processing parameters of the field sensor through the cDAQ controller and storing the valve time sequence through the cDAQ controller.
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