Comprehensive Pressure Test Bench

【Equipment Introduction】

Comprehensive Pressure Test Bench is used to verify the pressurization, pressure maintaining, depressurization, burst, length change rate and other tests of air conditioning pipes and automotive pressure bearing components in an environment filled with liquid (silicone oil).

【Test Items】

1. Burst test: Direct burst;
2. Pressure maintaining burst test: Pressurization-Pressure maintaining-Burst, pressure and pressure maintain time can be set arbitrarily;
3. Multi stage pressure maintaining test: Pressurization-Pressure maintaining-Pressurization-Pressure maintaining-Depressurization, multi stage test;
4. Length change rate: Fill in water and pressurization, mark 300mm, pressurization, pressure maintaining for 5 min, measure again to calculate length change rate;
5. Pressure maintaining method: Compensation pressure maintaining;

【Technical Parameters】

Equipment appearance:

• L×W×H (approx.): ≤2400×1200×2100(mm) net size with chamber door closed;

• Total weight: 800kg;

Auxiliary power:

• Power supply: AC380V(+15%/-10%), 50Hz, 16kW;

• Gas source: 0.6-0.8Mpa, flow rate>1.5m³/min;

Burst pressure pressurization system:

• Test pressure: 0.5-60MPa;

• Pressurization rate: 0.5Mpa/min-20Mpa/min/adjustable/according to the test piece expansion;

• Peak value recording: Mea

• surement and control software recording;

• Pressure measurement accuracy: ±0.25%F.S.;

• Pressure control accuracy: ±1.5%F.S;

• Pressure maintaining time: Set arbitrarily;

• Filled and exhaust: Automatic liquid filled;

• Test medium treatment method after test: Equipment equipped with built-in discharge port, which is connected to The Customer's drainage point;

Medium system:

• Test medium: Silicone oil;

• Filter: 80μm;

• Medium temperature: RT+10~150℃;

• Medium tank: Normal temperature tank 30L+High temperature medium tank 30L;

• Heating method: Electric heating pipe+PID temperature control method;

• Material: Stainless steel;

• Temperature: RT;

High temperature environment chamber:

• Test part: External double-sided galvanized sheet spray coating, internal 1.5mm thick 304 stainless steel sheet/with test piece protection tooling;

• Temperature range: RT+10~150℃;

• Temperature uniformity: ±2℃;

• Temperature setting: 0.1℃;

• Stable deviation: ±1℃;

• Safety observation door: The observation window adopts protective glass with lighting system;

• Test chamber: L×W×H: 1400×580×600mm (approx.);

Test piece tooling:

• Connecting tooling: 

  Single station, hydraulic clamping method (with clamp, core, hydraulic station);

  Threaded joints at both ends of the hose are equipped with fixed and protective tooling;

• Test piece dimension: Burst test dimension: Lmax=1000mm, internal diameter specification: 8, 9.5, 10.5, 13, 16, 18;

Length change rate test:

• Measurement method: Laser displacement sensor;

• Tooling: Adopt leading-off rod, indirect measurement method;

Expansion test:

• Test piece expansion test: Used to test the volumetric expansion of test piece under a certain pressure;

• Test method: Considering the high pressure and large volume of The Customer's existing pipeline, the system adopts balance for weighing;

Computer system:

• Lower computer: PLC;

• Upper computer: Industrial computer;

Computer software:

• Control software: visual basic/Labview;

• Report format: Microsoft Office;

【Product Advantages】

• The structural design of the computer monitoring cabinet (left side), pressure test system (bottom of the Burst Test Bench), and test chamber (right side) adopts the unified style (color: gray fine wrinkle 1022/white wrinkle 0050/decorative strip is pale phthalein blue);

• The appearance of the equipment is double-sided galvanized sheet with spray coating treatment, and the test piece chamber is made of 304 stainless steel sheet;

• Lighting is installed inside the Burst Test Bench for easy observation;

• Adopt mechanical equipment carbon steel stamping, surface spraying & galvanized Footmaster casters, the casters can be fixed and moved by adjusting the built-in knobs up and down;

• System pressurization rate control and display: Determine the pressurization rate and upper limit of the test piece pressure, record and draw the pressure-time curve during loading, resolution accuracy: pressure: 0.001MPa/index, time: 1s/index; The rate resolution is divided into horizontal and vertical intersection points, accuracy＜0.001MPa/s;

• Pressure sensor of the system includes external pressure interface, which is comparison measurement pressure port;

• Pressure source of the system is the gas-liquid booster pump, with pressure range of 0.5-60MPa. It is controlled by the pneumatic proportional valve, and the system automatically switches the pressure control system through solenoid valve to achieve full range without dead zones;

• The sensor adopts well-known brand sensors to ensure the accuracy of pressure measurement;

• Low pressure section of Comprehensive Pressure Test Bench adopts gas-liquid pressurization principle with higher accuracy, stability, and excellent continuity of pressurization and depressurization. Due to the closed-loop control, with high repeatability;

• For the selection of gas driven pump, the system adopts imported low friction high flow rate gas driven booster pump, which reduces the dead zone during the gas driven pump starts and achieves continuous pressurization through pump rapid switching, which can continue to work with stable performance and high reliability;

• The constant pressure hydraulic source adopts high quality gas driven pump, combined with pressure stabilization and energy storage system to provide constant pressure source, ensuring stable output;

• The system joints and pipelines adopt ultra-high pressure stainless steel joints and high pressure seamless stainless steel pipes to ensure the safety of the system, and the entire system pipeline is non-welded;

• Test data automatic collection and processing: Automatic establishment of test database, which can be queried at any time, and data can be stored for a long time; Real time display of test curves and parameters, as well as storage and recording of test results, such as burst peak values, test pressures, etc; The stored data can be exported in office document format. After the test is completed, print the test report and pressure curve, and the test report can be freely edited;

• The system adopts high-frequency pressure sensor to achieve high speed pressurization rate, with high sampling frequency. Through high frequency sampling, the output pressure can be more accurately controlled and the smoother pressure output curve can be drawn;

• The system also adds the abnormal pressure relief valve, which can safely unload the high pressure inside the system in case of any abnormalities;

• Adopt ZWH's self-developed dedicated control software, the test process is fully automatic control and automatic measurement, which has the characteristics of good professionalism, high reliability, and easy upgrade, and can be continuously upgraded and improved with the development of testing machine measurement and control technology and updates in the test standard;

• After the test piece bursts, the pressure rapidly drops and the pressurization automatically stops, that is after the test piece is damaged, the equipment has the automatic shutdown protection function, which maximizes personal and equipment safety and suitable for unmanned testing;

• For safety reasons, pressure can only be pressurized when the safety door of the test chamber is closed;

• There is the transparent observation window on the safety door of the test chamber, which allows for clear observation and inspection of the leakage and burst of the test piece during test;

• The operation interface is simple and convenient, and easy to update and maintain;

• Main electrical components are imported, ensuring the accuracy and stability of the testing machine in principle and quality;

• High quality gas driven pump and imported high pressure control valve can ensure that the whole equipment works without fault for a long time;

【Control System】

Computer control system is used for data collection, processing, and control of the whole system, mainly including gas liquid proportional control system, sensing control system, electrical control system, and control software system, etc;

• Gas liquid proportional control system: Gas liquid proportional control system can operate continuously, safely, and stably for a long time, meet burst test requirements; Control electro-pneumatic proportional valve through DA conversion module of PLC, and then control pneumatic pressure reducing valve through electro-pneumatic proportional valve to achieve control output pressure. Pressure control requires high dynamic response frequency, small feedback hysteresis, small control hysteresis, and small comprehensive pure hysteresis of the actuator, so the control is the most complex. After various theoretical derivation, virtual simulation, and practical verification, the pressure control method has been developed, and it has been proven in actual test operation that the pressure control method has high accuracy, fast speed, good repeatability, and stable operation;

• Sensing control system: Test system adopts pressure sensor and controller. Collect the pressure during test and medium pressure, and control the actuator based on the collected information;

• Electrical control system: 

  Electrical control system consists of strong current control system and weak current control system;

  Strong current control system: Safety protection of power supply voltage transformation, and system overload, short circuit, etc;

  Weak current control system: The system consists of PLC and electrical valves, etc; PLC is used for switch control and analog signal output of the whole equipment;

• Control software system: Burst equipment software consists of upper computer software and lower computer software. The upper computer software is the control service program running on the industrial control computer, including human-machine interface function and data collection and processing; The lower computer software is the control program that runs on the PLC to control the shutdown and disconnection of various actuators;

【Safety Design】

• Safety: The equipment adopts automatic control mode and sets the information required for testing the workpiece (oil cooler) to achieve normal operation. The equipment can display pressure changes in real time during operation, which is equipped with overpressure safety valve, automatic alarm stop function, and emergency stop function to ensure the safety of the equipment, workpiece, and personnel;

• Reliability: All components of the equipment are supplied by high-quality brand suppliers to ensure reliable quality. All core components are imported brands. The equipment undergoes strict debugging and acceptance before leaving the factory to ensure reliable operation;

• Technical feasibility: Similar equipment ZWH already has design and production before, the design personnel have mature technology to carry out detailed and perfect design of the equipment;

Company profile

 

Shenyang Ziweiheng Testing Equipment Co., Ltd., founded in 1996 and headquartered in Shenyang, is a national high-tech enterprise specializing in R&D, manufacturing and solutions of pressure, flow, temperature and durability test equipment. With multiple international management system certifications, ZWH owns rich patents and participates in drafting industry standards.
ZWH provides customized testing systems and one-stop solutions widely used in aerospace, automotive, new energy, rail transit and shipbuilding. Committed to technical innovation and reliable quality, ZWH has become a leading and influential provider in China's testing equipment industry.

01

High Quality

Integrated factory strength to support all kinds of testing equipment customization, with complete R&D, production and assembly capacity.

02

Advanced Equipment

Advanced equipment to ensure stable performance and high precision of our testing equipment.

03

Professional Team

Professional team to provide stable technical support and efficient customized solutions for testing equipment.

04

Custom Service

Custom service to fully understand different customer needs and provide professional, reliable and personalized testing solutions.

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