CN103884611A - Pressure testing device of pressure-bearing systems and members - Google Patents
Pressure testing device of pressure-bearing systems and members Download PDFInfo
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- CN103884611A CN103884611A CN201410113463.9A CN201410113463A CN103884611A CN 103884611 A CN103884611 A CN 103884611A CN 201410113463 A CN201410113463 A CN 201410113463A CN 103884611 A CN103884611 A CN 103884611A
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Abstract
The invention discloses a pressure testing device of pressure-bearing systems and members. The pressure testing device mainly consists of a pressure source, a cooling device, a data acquisition component and a control system. Clear water is taken as the working medium of the pressure source which has two operation modes including low-pressure pulse and high-pressure pulse. The pressure testing device disclosed by the invention has beneficial technical effects of simple structure, convenience in maintenance and accurate measurement results.
Description
Technical field
The present invention relates to measure, technical field of measurement and test, particularly a kind of for pressure bearing system and parts being carried out to the pressure experimental device of withstand voltage properties test and experiment on fatigue properties.
Background technology
For the interests of better Protection of consumer, for carrying out pressure test as the product such as electric heater, refrigerating plant, can effectively guarantee quality, the security performance of product.Because pressure test has various means of testing and requirement, for this reason, be directed to different classes of testing scheme, need to design different pressure test devices and realize.
According to GB4706.32 " the safe heat pump of family expenses and similar applications electrical equipment, the specific (special) requirements of air conditioner and dehumidifier " the requirement of pressure test clause, and the pulse that " GB/T 20289-2006 storage-type electric water heater " the 7.10th clause requires detects, the pulse testing that " electrical equipment that GB/T 23127-2008 is connected with water source avoids siphon and hose to lose efficacy " 9.1.7 clause requires, GB4706.11, in GB4706.12, constant speed boosts, the requirement of pressurize test, need to rely on two cover pressure test devices to realize, and apparatus structure complexity, cost is higher, the long-term after stain that uses is serious, not easy care.
Summary of the invention
The present invention is directed to prior art above shortcomings, the pressure experimental device of a kind of pressure bearing system and parts is provided.The present invention is achieved through the following technical solutions:
A pressure experimental device for pressure bearing system and parts, comprising:
Pressure source, adopts clear water as actuating medium, comprises two kinds of mode of operations of action of low-voltage pulse and high pressure, in order to provide test required pressure;
Test chamber body, Bonding pressure source, in order to place testee and to carry out pressure test;
Data acquisition assembly, Bonding pressure source and test chamber body, in order to gather pressure and the temperature data of clear water;
Control system, Bonding pressure source, test chamber body and data acquisition assembly, in order to control mode of operation, clear water pressure and the clear water temperature of pressure experimental device of pressure bearing system and parts;
Wherein, pressure source comprises:
Attemperater, in order to clear water is incubated, makes the temperature of clear water remain on a working temperature;
Water supply centrifugal pump, connects attemperater, in order to extract clear water from attemperater;
High-pressure pump, connects water supply centrifugal pump and test chamber body, in order to the clear water of extraction is pressurizeed and transfer to test chamber body, provides test required pressure;
CNC high-pressure generator, one end connects high-pressure pump by a reversal valve, and other end connecting test cabin body also connects water supply centrifugal pump by one first retaining valve, in order to accurately to control clear water pressure according to control system;
Pressure regulator valve, input end is connected between high-pressure pump and reversal valve, in order to change clear water pressure according to control system, forms the required pressure waveform of test;
Action of low-voltage pulse generator, input end is connected to the output terminal of pressure regulator valve, and output terminal, by one second retaining valve connecting test cabin body, in order to according to the accurate controlled pressure waveform of control system, forms the required action of low-voltage pulse of test;
Under high-pressure work pattern, reversal valve is to a first direction conducting, the first retaining valve, the second closed check valve; Under action of low-voltage pulse mode of operation, reversal valve is to a second direction conducting, the first retaining valve, the second retaining valve conducting.
Preferably, also comprise a well heater, under high-pressure work pattern, well heater is arranged in attemperater; Under action of low-voltage pulse mode of operation, well heater is arranged in test chamber body.
Preferably, attemperater is the spacer structure that 304 flat cold-rolled sheets are welded, and between 304 flat cold-rolled sheets, fills for heat insulation alumina silicate heat-preservation cotton.
Preferably, attemperater comprises water inlet pipe and rising pipe, is provided with an entering water electromagnetic valve on water inlet pipe, and in order to according to the liquid level conducting of clear water in attemperater or close, in order to maintain the liquid level of clear water in attemperater, rising pipe connects water supply centrifugal pump.
Preferably, be also provided with filtrator on water inlet pipe, filtering accuracy is 5 ~ 10 μ m, and flow is 3 ~ 5 times of maximum flow of water supply centrifugal pump, to increase system service time, reduces system maintenance frequency.
Preferably, also comprise a safety valve, be arranged on high pressure delivery side of pump, the pressure of safety valve is 1.1 times of pressure experimental device top pressure of pressure bearing system and parts.
Preferably, also comprise a cooling device, connecting test cabin body, in order to carry out low-temperature test.
The present invention is simple in structure, be convenient to safeguard, and measurement result is accurate, the limited the deficiencies in the prior art that made up.
Accompanying drawing explanation
Shown in Fig. 1 is structural representation of the present invention.
Embodiment
Below with reference to accompanying drawing of the present invention; technical scheme in the embodiment of the present invention is carried out to clear, complete description and discussion; obviously; as described herein is only a part of example of the present invention; it is not whole examples; based on the embodiment in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to protection scope of the present invention.
For the ease of the understanding to the embodiment of the present invention, be further explained as an example of specific embodiment example below in conjunction with accompanying drawing, and each embodiment does not form the restriction to the embodiment of the present invention.
As shown in Figure 1, in order to meet the requirement of pressure test, the invention provides the pressure experimental device of a kind of pressure bearing system and parts, mainly by pressure source, cooling device, data acquisition assembly, composition of the control system.
Pressure source as actuating medium, has action of low-voltage pulse (being mainly used in pressure-bearing and the pulse testing test of household products) and two kinds of mode of operations of high pressure (being mainly used in the voltage-withstand test of refrigeration product) with clear water, comprising:
1) attemperater
Powerful stainless steel electric heater is installed on attemperater 1 madial wall, can one case water be heated to 95 degrees Celsius of maximum operating temperatures about 30 minutes.
2) water supply centrifugal pump
Water supply centrifugal pump 2 draws water in attemperater 1, is supplied to high-pressure pump 4.For increasing the water supply capacity to high-pressure pump 4, prevent that high-pressure pump 4 inlet channel resistances are excessive, cause high-pressure pump 4 water inlets cavitation erosions and affect result of use and the life-span of high-pressure pump 4.
3) high-pressure pump
High-pressure pump 4 uses the horizontal three plunger High Temperature High Pressure water pumps of import, and this pump rated operating pressure is 6.0MPa, theoretical delivery rate 5.4L/min, and actual maximum working pressure (MWP) is 2.5MPa, flow 3L/min.Safety valve is installed in pump group and has been used for preventing that system overpressure from causing equipment and damage to person.
4) CNC high-pressure generator
CNC high-pressure generator 9, connect high-pressure pump 4 by reversal valve 65, output terminal connecting test cabin body 8 also connects water supply centrifugal pump by retaining valve 64, CNC high-pressure generator 9 uses AC servo machinery driving ball-screw, and then the piston that drives a stainless steel unidirectional post plug cylinder moves the accurately volume of the interior water-filling of modifier, the output pressure that acquisition is accurate adjustable.In theory, the accurate control of can obtain ± 0.02bar of device internal pressure, special, buck time and the dwell time of device can obtain accurate control, and the fastest buck time can reach 0.1s, so can accurately control clear water pressure according to control system 12.
5) pressure regulator valve
6) action of low-voltage pulse generator
The input end of action of low-voltage pulse generator 10 is connected to the output terminal of pressure regulator valve 66, and output terminal, by retaining valve 68 connecting test cabin bodies 8, in order to according to the accurate controlled pressure waveform of control system, forms the required action of low-voltage pulse of test.
In the present embodiment, under high-pressure work pattern, reversal valve 66 conducting to the right, retaining valve 64, retaining valve 68 are closed, and now, action of low-voltage pulse generator 10 is not worked; Under action of low-voltage pulse mode of operation, reversal valve is to a second direction conducting, retaining valve 64, retaining valve 68 conductings, and now CNC high-pressure generator 9 is not worked.
Preferably, water inlet ball-cock assembly 61, filtrator 3, water outlet ball-cock assembly 63 can also be set on the water inlet pipe of attemperater 1 and rising pipe.The manual control during for the system failure of water inlet ball-cock assembly 61, water outlet ball-cock assembly 63, the filtering accuracy of filtrator 3 is 5 ~ 10 μ m, flow is 3 ~ 5 times of maximum flow of water supply centrifugal pump 2, to increase system service time, reduces device frequency of maintenance.
Preferably, at the output terminal of high-pressure pump 4, safety valve 67 is set, the pressure of safety valve 67 is 1.1 times of pressure experimental device top pressure of pressure bearing system and parts, the maximum working pressure (MWP) of restriction system during for system works, anti-locking system contingency produces device damage or personal injury accident while there is superpressure.
The pressure experimental device that pressure source is controlled pressure bearing system and parts by retaining valve 64,68 and reversal valve 65 works in action of low-voltage pulse or high-pressure work pattern, and structure and operation are all very simple and reliable.Under high-pressure work pattern, well heater is set in attemperater, clear water is heated; Under action of low-voltage pulse mode of operation, in test chamber body, well heater is set, can in protection test product, guarantee like this accuracy of test.
Test chamber body 8: in test process, all test product is arranged in a substantially airtight test compartment.Test chamber body 8 fronts have the hatch door for safeguarding and overhaul use, and a side is useful on the stainless steel heating of heating indoor environment, and the top outside test chamber body 8 is provided with the cooling device 11 of cooling indoor environment, control by retaining valve 69 and 610.The inner front of test chamber body 8 is provided with detected element installing plate, on it, has five test interfaces for connecting with test product according to certain pitch arrangement.Between test chamber body 8 and pressure source, adopt high-pressure hose 7 to be connected, guarantee good oil resistant, heat-resisting and ageing-resistant performance, bear that pressure is high, pulse function admirable.
For meeting according to the test operating mode of standard-required, the temperature in test chamber body 8 can coordinate cooling device 11 and well heater adjustable continuously within the scope of 25 ~ 250 degrees Celsius by control system 12.Wherein, when needs test chamber body 8 interior temperature are during lower than ambient temperature, regulate the temperature in test chamber body 8 by cooling device 11; In the time requiring the projecting environment temperature of the interior temperature of test chamber body 8, coordinate well heater to regulate the temperature in test chamber body 8 by controllable silicon power regulator.Damage cooling device 11 when preventing excess Temperature, between cooling device 11 and well heater, set up partition apparatus, high temperature experiment is after the heat conduction of absolute cooling device 11.
The partition wall that test compartment inside surrounds for stainless steel thick plate, partition wall periphery is enclosed with heat insulation layer and avoids scattering and disappearing of heat, and the outside (exterior wall of test chamber body 8) of thermofin is that plastic-blasting is processed color steel, guarantees the attractive in appearance of device outer surface.
Data acquisition assembly: sensor is mainly precision pressure, temperature sensor, 0.2 grade of accuracy class, it,, for changing intrasystem pressure and temperature signal into electric signal, is input in control system 12.This sensor is Stainless Steel Shell, uses piezoelectric ceramics as sensitive element.
Temperature sensor is installed for controlling the operating ambient temperature of tested element in test compartment in test compartment.This temperature sensor attaches temperature compensation function, the impact of avoiding the difference of probe temperature to bring to measurement numerical value.
Data acquisition system (DAS) is used high speed plc data acquisition system, the electric signal of pressure transducer and temperature sensor output is converted into the data with character representation, can be stored in the data file of hard disc of computer as test data file file for future examination by control system on the one hand, can in the graphical interfaces of control system, directly be shown as in real time curve on the other hand, reflect intuitively experimentation.
Control system: for forceful electric power and light current control, and follow-up data processing, man machine operation interface and system condition display and processing system.Master element is industrial computer, coordinates Graph Control interface, the forceful electric power, the light current control that use in can completion system, and the figure of system health shows, the direct input of system operational parameters etc., the functions such as the automatic generation of test report file.
The connecting line that native system uses all can be the seamless pressure duct of 304 precision stainless steel, for guaranteeing the connection sealing effectiveness of joint and pipeline, uses welding joint, uses argon arc welding welding when welding.Joint uses the conical surface metal sealing of sealing gasket sealing or moulding while connection.
Preferably, tensimeter can be set in the present invention for display system internal pressure, and link with control system 12, play a protective role, in addition, also can do mutual comparison with the pressure transducer that uses in system.Tensimeter comprises inlet gage (this table is shockproof electrical contact manometer, and intake pressure stops high-pressure pump 4 to start when not enough), system high pressure tensimeter.
For guarantee, in the situation that appearance is abnormal, to reduce degree and the possibility of device damage as far as possible, be provided with some safety guards, they are:
1, the hypodynamic warning device of influent pressure: in the time that pressure of supply water does not reach setting value, automatic alarm prompting are processed.
2, warning device when cistern water level is not enough: under normal circumstances, attemperater water level should automatically be controlled water inlet and stop into water between high and low liquid level and by system.Under abnormal conditions, when water level in case is during lower than utmost point low-water level, system automatic alarm is also shut down etc. pending.
3, system overpressure is reported to the police: in the time that system internal pressure exceedes the highest set pressure, system pressure sensor provides alerting signal after superpressure signal being detected automatically, and safety valve is opened release automatically simultaneously.
4, electrical equipment overload-alarm: when the water pump driving motor using in system transships, automatically disconnect contactor and report to the police by electrothermal relay.
The pulse that the present invention requires according to " GB/T 20289-2006 storage-type electric water heater " the 7.10th clause detects, the pulse testing that " electrical equipment that GB/T 23127-2008 is connected with water source avoids siphon and hose to lose efficacy " 9.1.7 clause requires, GB4706.11, in GB4706.12, constant speed boosts, the requirement of pressurize test, complete withstand voltage properties test and the experiment on fatigue properties of standard regulation, also can be used for refrigeration system parts according to the requirement of GB4706.32, complete withstand voltage properties test and the experiment on fatigue properties of standard regulation, and other similar tests.
The above; only for preferably embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (7)
1. a pressure experimental device for pressure bearing system and parts, is characterized in that, comprising:
Pressure source, adopts clear water as actuating medium, comprises two kinds of mode of operations of action of low-voltage pulse and high pressure, in order to provide test required pressure;
Test chamber body, connects described pressure source, in order to place testee and to carry out pressure test;
Data acquisition assembly, connects described pressure source and described test chamber body, in order to gather pressure and the temperature data of described clear water;
Control system, connects described pressure source, described test chamber body and described data acquisition assembly, in order to control mode of operation, clear water pressure and the clear water temperature of pressure experimental device of described pressure bearing system and parts;
Wherein, described pressure source comprises:
Attemperater, in order to described clear water is incubated, makes the temperature of described clear water remain on a working temperature;
Water supply centrifugal pump, connects described attemperater, in order to extract clear water from described attemperater;
High-pressure pump, connects described water supply centrifugal pump and described test chamber body, in order to the clear water of extraction is pressurizeed and transfer to described test chamber body, provides test required pressure;
CNC high-pressure generator, one end connects described high-pressure pump by a reversal valve, and the other end connects described test chamber body and connects described water supply centrifugal pump by one first retaining valve, in order to accurately to control clear water pressure according to described control system;
Pressure regulator valve, input end is connected between described high-pressure pump and described reversal valve, in order to change clear water pressure according to control system, forms the required pressure waveform of test;
Action of low-voltage pulse generator, input end is connected to the output terminal of described pressure regulator valve, and output terminal connects described test chamber body by one second retaining valve, in order to according to the accurate controlled pressure waveform of described control system, forms the required action of low-voltage pulse of test;
Under high-pressure work pattern, described reversal valve is to a first direction conducting, described the first retaining valve, described the second closed check valve; Under action of low-voltage pulse mode of operation, described reversal valve is to a second direction conducting, described the first retaining valve, described the second retaining valve conducting.
2. the pressure experimental device of pressure bearing system according to claim 1 and parts, is characterized in that, also comprises a well heater, and under high-pressure work pattern, described well heater is arranged in described attemperater; Under action of low-voltage pulse mode of operation, described well heater is arranged in described test chamber body.
3. the pressure experimental device of pressure bearing system according to claim 1 and parts, is characterized in that, described attemperater is the spacer structure that 304 flat cold-rolled sheets are welded, and between 304 flat cold-rolled sheets, fills for heat insulation alumina silicate heat-preservation cotton.
4. the pressure experimental device of pressure bearing system according to claim 1 and parts, it is characterized in that, described attemperater comprises water inlet pipe and rising pipe, on described water inlet pipe, be provided with an entering water electromagnetic valve, in order to according to the liquid level conducting of clear water in described attemperater or close, in order to maintain the liquid level of clear water in described attemperater, described rising pipe connects described water supply centrifugal pump.
5. the pressure experimental device of pressure bearing system according to claim 4 and parts, it is characterized in that, on described water inlet pipe, be also provided with filtrator, filtering accuracy is 5 ~ 10 μ m, flow is 3 ~ 5 times of maximum flow of described water supply centrifugal pump, to increase system service time, reduce system maintenance frequency.
6. the pressure experimental device of pressure bearing system according to claim 1 and parts, it is characterized in that, also comprise a safety valve, be arranged on described high pressure delivery side of pump, the pressure of described safety valve is 1.1 times of pressure experimental device top pressure of described pressure bearing system and parts.
7. the pressure experimental device of pressure bearing system according to claim 1 and parts, is characterized in that, also comprises a cooling device, connects described test chamber body, in order to carry out low-temperature test.
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| CN201410113463.9A CN103884611B (en) | 2014-03-25 | 2014-03-25 | Pressure bearing system and the pressure experimental device of parts |
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| CN201410113463.9A CN103884611B (en) | 2014-03-25 | 2014-03-25 | Pressure bearing system and the pressure experimental device of parts |
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| CN103884611B CN103884611B (en) | 2016-08-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362494A (en) * | 2020-10-15 | 2021-02-12 | 中国特种设备检测研究院 | Hydraulic bulging test system |
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| CN103884611B (en) | 2016-08-31 |
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