The utility model content
The utility model fundamental purpose is to address the above problem, provide a kind of detection accurately, precision is high, and the comprehensive tightness test platform of operation simple and feasible.
For achieving the above object, the technical solution of the utility model is:
A kind of comprehensive tightness test platform comprises:
Be provided with air intake opening, gas outlet and pressure detection interface at described cabinet, described gas outlet is communicated with tested body by pipeline, described air intake opening is connected with wind regime by pipeline, at the pipeline that connects described air intake opening and described gas outlet the inflation solenoid valve is set, described pressure detection interface one termination pressure detecting part, the other end of described pressure detection interface is communicated with described tested body by detecting tracheae;
Computer controling equipment is used for the control of whole testing table, the input of data, output, collection, analysis and processing;
Described pressure detecting part, inflation solenoid valve are connected with described computer controling equipment signal.
Further, pre-stored in described computer controling equipment have under without the leak source state charge pressure and the normal pressure curve of time in the tested body.
Further, have pressure figure contrast unit in the described computer controling equipment, be used for actual pressure curve and the normal pressure curve that process of the test is measured and compare.
Further: in described computer controling equipment, be provided with the unit that gives warning in advance, be used for giving warning in advance according to the comparing result of actual pressure curve and normal pressure curve.
Further, in described computer controling equipment, be provided with the pressure limiting automatic alarm unit of top pressure.
Further, in described computer controling equipment, also comprise the automatic duplicating of data storage unit.
Further, on the connecting line between described gas outlet and the described air intake opening, also be connected with a sensator for reducing blast.
Further, at described cabinet one water column scale is set, described water column scale is communicated with described tested body by tracheae.
Further, also be provided with an exhausr port on described cabinet, described exhausr port is connected with described tested body by gas outlet, is provided with drain tap in described exhaust ports.
Further, this testing table also includes wireless transmit and receiving equipment.
Content to sum up, comprehensive tightness test platform described in the utility model, the integration of equipments that tightness test is all is in a cabinet, by the unified control of computer controling equipment, but also have the function of giving warning in advance, and not only greatly improved the security of tightness test, can also conveniently, accurate, safe and effective finish tightness test, shorten test period, raise the efficiency.
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
As depicted in figs. 1 and 2, a kind of comprehensive tightness test platform is used for tested body is carried out tightness test, and in the present embodiment, tested body refers to the compartment (not shown) in the rail vehicle.Testing table comprises a cabinet 1, all tightness test equipment needed therebies, and such as computer controling equipment, inflation solenoid valve, pressure-releasing electromagnetic valve, sensator, water column scale etc., all integrated installation is fixed on this cabinet 1.
In the present embodiment, the cabinet 1 preferred aluminum alloy material that adopts makes the generous coordination of outward appearance of whole cabinet 1.Be provided with four wheels 2 in the bottom of cabinet 1, wherein at least two wheels 2 are braked wheel, are provided with handrail 3 in a side of cabinet 1, convenient mobile this testing table, and the front of cabinet 1 is provided with openable cabinet door 4, maintains easily and overhauls.
In the present embodiment, computer controling equipment comprises keyboard 5, display 6, printer 7, industrial computer 8.
Wherein, keyboard 5 is fixed on the table top of cabinet 1, be used for operating personnel and export various instruction and datas, as when test is initial, operating personnel can pass through keyboard 5 and input present situation pressure, test condition selection, unit type, the cut-off of the equipment term of validity, test pressure setting, vehicle, time and the operator in testing tables and compartment, examiner's signature etc.
Display 6 is used for showing various test figures and demonstration pressure figure, and in order to make things convenient for observed data and figure, cabinet 1 also has a slave station face that tilts, and display 6 is fixed on the slave station face.
8 inside that are installed in cabinet 1 of printer 7 and industrial computer.Printer 7 is used for the required various experimental reports of printing personnel, 8 running, data acquisition, data analysis and processing that are used for each equipment of control of industrial computer, industrial computer 8 can be captured in according to the utilization parameter of setting the pressure data of test point under the different time, then in coordinate (time, pressure), show with curve, pressure curve can show in display 6, also can print by printer 7.
Be provided with gas outlet 9, air intake opening 10, pressure detection interface 11, water column scale 12, exhausr port 13 at cabinet 1, in cabinet 1, be provided with inflation solenoid valve 14, drain tap 15, filtrator 16, sensator (not shown), pressure detecting part (not shown).
Wherein, gas outlet 9 is communicated with the compartment by pipeline, air intake opening 10 is connected with wind regime by flexible pipe, connecting hose satisfies in the time of 600Kpa pressure and is connected firmly, loosening, for fixing flexible pipe, avoid the flexible pipe damage, sidewall at cabinet 1 is provided with safety hook, and flexible pipe is fixed on the safety hook.Gas outlet 9 and air intake opening 10 all arrange rapid-acting coupling with the position of pipe joint, and handled easily also can be avoided leaking gas in the joint simultaneously.
By pipeline connection, be provided with inflation solenoid valve 14, filtrator 16, sensator at this pipeline between gas outlet 9 and the air intake opening 10.Sensator is for reducing the blast of wind regime, and to satisfy the air pressure requirement of inflating in the compartment, sensator is arranged on the draft tube of filtrator 16.Filtrator 16 is used for filtering the air of coming from wind regime, guarantees to enter the cleanliness factor of the air in the compartment, improves the accuracy of test, guarantees that simultaneously the compartment is not damaged.Inflation solenoid valve 14 is connected with industrial computer 8, controls its switchings according to testing requirements by industrial computer 8.When inflation solenoid valve 14 is opened, the air of wind regime is inflated in the compartment through air intake opening 10, sensator, filtrator 16, inflation solenoid valve 14, gas outlet 9 successively, set when requiring when the air pressure in the compartment reaches, close inflation solenoid valve 14, stop in the compartment, to inflate.
Pressure detection interface 11 1 termination pressure detecting parts, the other end is communicated with the compartment by detecting tracheae, in the present embodiment, the pressure detecting part adopts pressure sensor.Pressure transducer is connected with industrial computer 8 signals, when the air pressure in the compartment rises and descend, detect endotracheal air pressure and also can follow rising and decline, pressure transducer just can detect and detect endotracheal air pressure, and the pressure data that detects is transferred to industrial computer 8, do data acquisition and analyzing and processing by industrial computer 8, show force value, and generate simultaneously the curve of the pressure variation of pressure and time.
Testing table is inflated in the compartment, after air in a car compartment is pressurized to top pressure, stop inflation, at this moment, the compartment is in nature gas leakage state, lengthening along with the time, pressure in the compartment can reduce, when hypotension begins timing during to the initiation pressure of testing requirements, stop timing when being reduced to the end of a period pressure of testing requirements, industrial computer 8 automatic start-of-record timing and the time and the detailed precise time interval that stop timing, and by gathering at any time the pressure data of pressure transducer, generate pressure curve.
Also be provided with an exhausr port 13 on cabinet 1, exhausr port 13 is communicated with the compartment by gas outlet, and 13 places are provided with drain tap 15 at exhausr port, and drain tap 15 can manually be controlled, also can be by industrial computer 8 controls.After air-tight test finishes, perhaps in the process of the test emergency case is arranged, when needing fast the air in the compartment to be discharged, just can open drain tap 15, discharge fast the air in the compartment.
Arrange one at cabinet 1 and be U-shaped water column scale 12, one end of water column scale 12 is communicated with the compartment by tracheae, the scale that shows force value is arranged on the water column scale 12, at the water column of water column scale 12 interior perfusion certain altitudes, satisfy the requirement of maximum inflation pressure 15Kpa in the compartment.Water column scale 12 is fixed on the outer wall of cabinet 1, and the convenient operation personnel observe, and attractive and durable.When the pressure of compartment 1 interior air changes, the height of water column will be along with variation in " U " type pipe, and operating personnel can by the height of water notes on the water column scale 12, judge the charge pressure in the compartment, when the charge pressure in the compartment during greater than mxm., the water in the water column scale 12 can overflow.
In the present embodiment, pre-stored in industrial computer 8 have under without the leak source state charge pressure and the normal pressure curve of time in the compartment, the pressure curve of different automobile types can be different, this normal pressure curve begins timing when beginning to inflate, until test period finishes the time dependent typical curve of charge pressure in the reflection compartment.Also has pressure figure contrast unit in the industrial computer 8, being about to actual pressure curve measured in this process of the test and the normal pressure curve of above-mentioned this vehicle compares, reflect thus whether the charge pressure in the compartment is normal, judge with this whether the compartment has leak source.When at one time, when the force value in the compartment did not reach the normal pressure value that indicates on the normal pressure curve, just can illustrate had leak source in the compartment, in addition, according to the size of force value difference, also can judge the size of leak source.
In industrial computer 8, be provided with the unit that gives warning in advance, in process of the test, comparing result according to actual pressure curve and normal pressure curve, whether leak source is arranged in the automatic decision compartment, namely in gas replenishment process, when at one time, when the force value in the compartment does not reach the normal pressure value that indicates on the normal pressure curve, this this time of unit judges aeration test that gives warning in advance can't be satisfied test standard, gives warning in advance, and closes by industrial computer 8 control inflation solenoid valves 14, stop in the compartment, to inflate, this off-test can be known just whether leak source is arranged in the compartment after the whole end of unnecessary so by the time inflation or the off-test, but stop at any time inflation, reduce to test required time, raise the efficiency, operating personnel detect leak source, carry out test next time after the correction again.
In industrial computer 8, be provided with the pressure limiting automatic alarm unit of top pressure, maximum inflation, detection setup pressure value are 15Kpa, between (0～15) Kpa, can freely carry out the pressure setting, in the process of the test, when the pressure in the compartment surpasses the highest setup pressure value, automatic alarm and simultaneously autoshutdown inflation solenoid valve 14 stop to continue inflation in the compartment.
In industrial computer 8, also comprise the automatic duplicating of data memory module, back-up disk is set separately, store at any time related data information, effectively prevent loss of data, also have simultaneously data readback, data analysis function.
This testing table also includes wireless transmit and receiving equipment, be provided with wireless receiving antenna 17 at the top of cabinet 1, wireless receiving antenna 17 is connected with industrial computer 8 signals, telecommand is transferred to industrial computer 8, industrial computer 8 is again according to the running of instruction control relevant device, make this testing table realize wireless transmission control function, when hunting leak, can control inflation, the exhaust of vehicle by controlled in wireless, transfer function when sealing at roof or overhead gantry position.
On cabinet 1, also have power input interface 18, be used for the access external power source, on the slave station face of cabinet 1, can also be provided with tensimeter 19, pilot lamp 20 etc.
The below describes the course of work of this testing table in detail:
1) at first the vehicle window in compartment is closed, with the door sealing of the packoffs such as airtight end door with the two ends, compartment, thereby with the sealing of whole compartment.
2) start computer controling equipment, operating personnel pass through keyboard 4 and input present situation pressure, test condition selection, unit type, the cut-off of the equipment term of validity, test pressure setting, vehicle, time and the operator in testing tables and compartment, examiner's signature etc.
3) open inflation solenoid valve 11, connect wind regime and relevant connecting line, in the compartment, inflate.
4) pressure of air in a car compartment can rise gradually, air pressure in the compartment rises and reaches the top pressure of regulation, is 8000Pa as the top pressure value can be set, and will inflate solenoid valve 14 by computer controling equipment and close, thereby the intake channel of wind regime is disconnected, stop in the compartment, to inflate.
Allow the compartment under the state of nature, leak, at this moment, the pressure of air in a car compartment will slowly descend, when the pressure drop in the compartment arrives the initiation pressure of testing requirements, be 4000 Pa as this initiation pressure value can be set, the timer in the computer controling equipment begins timing, and then pressure is when dropping to the end of a period pressure of testing requirements again, be 1000 Pa as this initiation pressure value can be set, timing stops.
In this process, detect at any time air pressure in the compartment by pressure transducer, and be transferred to computer controling equipment, computer controling equipment shows pressure data, and draws simultaneously the actual pressure change curve of this test.
5) with in the process of the test, the normal pressure curve of measured actual pressure curve and this pre-stored vehicle compares, reflect thus whether the charge pressure in the compartment is normal, judge with this whether the compartment has leak source, judge that the impermeability of vehicle meets the designing requirement of vehicle.
When at one time, when the force value in the compartment did not reach the normal pressure value that indicates on the normal pressure curve, just can illustrate had leak source in the compartment, and the impermeability of vehicle can not satisfy the designing requirement of vehicle.In addition, according to the size of force value difference, also can judge the size of leak source.
Giving warning in advance the unit can be according to the comparing result of pressure curve, stop at any time inflation, finishes this tightness test.
As mentioned above, given scheme content can derive similar technical scheme in conjunction with the accompanying drawings and embodiments.In every case be the content that does not break away from technical solutions of the utility model,, all still belong in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment does according to technical spirit of the present utility model.