Pipe static hydraulic testing machine

Pipe static hydraulic testing machineProduct Overview:

Our company adoptsexcellentThe Airless pressure measurement and control system is based on dual CPU control (computer and instrument) with the same pressure control method as Denmark. It uses voltage division control technology to control each branch test independently and without interference; Can conduct various tests under different pressures and durations simultaneously. Suitable for PVC, PE, PP-RLong term static hydraulic tests, instantaneous burst tests, and thermal stability tests on various materials and pipe diameters8760 experiment, etc.

The product has the characteristics of beautiful appearance, simple structure, high precision, good stability, and easy operation, and is a testing instrument needed by various quality inspection departments of research institutes and pipe manufacturers.

Compliant with standards:

1）GB/T6111-2018 Thermoplastic pipes for fluid transportation Internal pressure resistance test method

2）GB/T18252-2020 Determination of long-term static hydraulic strength of thermoplastic pipes using extrapolation method for plastic piping systems

3）GB/T15560-1995Plastic pipes for fluid transportation - Hydraulic instantaneous burst and pressure resistance test method

4）GB/T184762019 Polyolefin pipes for fluid transportation Determination of crack propagation resistance Test Method for Slow Growth of Cracks in Cut Pipe (Cut Test)

5）Other standards:ISO1167TheISO9080TheEN921TheASTMD1598TheASTMD1599 ISO13479

Pipe static hydraulic testing machinePerformance Introduction:

1) Microcomputer control unit

System: This system is equipped with an independent control subsystem for each branch, achieving true branch control without the mutual influence phenomenon encountered by a single control system. Even during single path maintenance, other branches still do not affect work.

Function: Distinguish various test states including boost, supplement, release, overpressure, operation, end, leakage, and explosion; Automatic discriminationTime parameters such as "effective test time" (the time when the pressure is within the set pressure control tolerance zone) and "remaining time". Simultaneously adjust the relationship between the "set time" and "effective time" automatically, so that the test will only stop automatically when the "effective time" reaches the "set time" (to prevent the system from shutting down when the time is not up due to "fault time" or "invalid time" during periods such as holidays)

Offline test performance: After the upper computer starts the test, the computer will standby or even shut down, and the instrument subsystem will independently complete the test. After turning on, the software will automatically upload historical data, complete curve parameter analysis, and perform other functions such as saving and printing. Prevent the situation where some products have no data when offline, resulting in experimental redo. It is also possible to separately set and control parameters such as local pressure, accuracy, and time without turning on the upper system computer; Real time display of pressure, time, and status, and storage of various parameter data.

2) Electromagnetic valve

Two high-quality solenoid valves are imported from the Netherlands. Due to the excellent voltage division method synchronized with Germany and Denmark, one pressure boosting and compensating piezoelectric valve can change the operating frequency and time according to the test situation, meeting the requirements of fast and accurate pressure boosting and stabilization for ultra small caliber and large caliber with large expansion. Enable the device to have a wide range of applications（The requirement for high pressure control accuracy (better than ± 1% and up to ± 0.01Mpa) is met for pipes with a diameter of Ø 16 Ø 1200PE.

3) High precision sensors

One imported high-precision sensor to ensure resolution0.001Mpa and the maximum pressing accuracy reaches the set value of ± 0.01Mpa.

4) A separately established main pressure control system

One set of imported water pressure station, which has a larger flow rate, better performance, longer lifespan, lower noise, and does not require an air pump compared to domestic water pressure testing pumps and some manufacturers' gas driven water pumps (which require gas driven water).

Independent main pressure control instrument, equipped with imported sensors, controls the main pressure within the pressure range required by the user, with performance and lifespan far superior to mechanical electric contact pressure gauges.

5) Each pipeline also has a one-way valve and a fine adjustment valve.

6) A set of branded computers.

Features and composition of this machine:

1. Characteristics

1) Continuous barrier free operation ensures the integrity of the experiment;

2) The branches are independent of each other, making it easy to operate and maintain;

3) Equipped with a separate pressurized water tank, pure water is used to supplement the pressure in the pipe sample through the main pressurized pump, ensuring the water quality in the pipeline and improving the service life of pipeline components such as solenoid valves, needle valves, globe valves, and check valves;

4) Using independently developed pulse duty cycle compensation technology, the boost and compensation stages are combined into one, reducing the number of branches and components and thus reducing the probability of device damage;

5) . The plunger pump made in Taiwan, China, China, has low noise, fast pressure make-up and short working time, which indirectly improves the service life of the plunger pump;

6) On the basis of instrument control, a PC (i.e. computer) is equipped and connected to the instrument through a serial port.

a、 Can draw pressure time curve,

b、 Can print and output reports,

c、 Can replace manual duty, automatically recording pressure values when unattended (such as at night);

d、The computer can stop working at any time while the instrument continues to work.

2. Composition description of the equipment:

This testing machine consists of five parts: pressure control system, pressure source, constant temperature medium box, fixture, and computer.

1) The pressure control system in the control cabinet consists of two parts: the pressurization pipeline and the electrical control. The pressurized pipeline consists of components such as an accumulator, solenoid valve, one-way valve, filter, manual needle valve, and connecting pipeline. The electrical control part consists of digital pressure gauges, temperature control instruments, pressure sensors, solenoid valves, relays, overheat protectors, various switches, etc.

2) The pressure source is used to provide total pressure to the main pressure system according to the test conditions.

3) The constant temperature medium box is mainly composed of a box body, a circulating pump, a heater, and a temperature control system. The box body consists of a stainless steel inner liner, a spray coated outer shell (or stainless steel), an insulation layer, a sample bracket, and a box cover.

4) The fixture is of type A, making it more convenient and easy to disassemble and assemble; The wedge-shaped threaded clamping device provides greater clamping force. This series of fixtures has the characteristics of reasonable structure, fast clamping speed, reliable sealing, and easy disassembly.

5) The computer is equipped with a branded machine, which is connected to the control cabinet through a serial port. Brand machines are covered by nationwide warranty and can be maintained at various branches.

working principle

The working principle of this machine is:

1) Set the control pressure and range of the main pressure instrument, so that the pressure source provides a pressure of 2-3MPa higher than the maximum pressure of the branch and stores it in the accumulator.

2) Calculate the test pressure according to the ring stress requirements of the sample, and set the control pressure and range of the branch pressure instrument accordingly. After operation, the instrument controls the solenoid valve to be fully conductive, causing the pressure of the sample to rise rapidly. When the set pressure is reached, enter the pressure replenishment stage.

3) During the pressure replenishment stage, the solenoid valve intermittently conducts based on instrument data, allowing the pressure in the pressure source accumulator to be replenished into the sample.

4) When the pressure of the pressure source drops to the set low pressure value, the plunger pump starts working and stops when it reaches the high value.

5) This machine also has functions such as operation, stop, leakage warning, and rupture recognition, allowing operators to leave the experimental site during the testing process. When the sample leaks or ruptures, an automatic alarm will sound and the circuit will be automatically closed. Other tests will continue to proceed normally until the test is completed. It has excellent performance price ratio among similar models and is an ideal product to replace imports.

6) The machine has a serial port that can be paired with an external computer to draw pressure time curves, print and output reports, and can replace manual dutiesWhen the computer stops working, the instrument can still continue to operate. But the computer does not directly control the solenoid valve, it must be controlled by an instrument, and the instrument cannot stop working during the test.During the experiment, the computer can be turned off at any time to perform other business tasks, and the host is working normally. When the host is connected to the computer, the host automatically transfers data to the computer without any impact on the experiment.

6) TheThe heating inside the main tank of the water tank can ensure the service life of the heating tube, and the extracorporeal circulation makes the water temperature in the water tank uniform. The constant temperature medium water tank is divided into two specifications: single heating and cooling/heating. This machine is at room temperature～95Temperature control method.

Technical parameters

1. Host pressure range0.5～10.0MPa(Can be adjusted arbitrarily)

2. Water tank control range: room temperature to 95 degrees Celsius

3. Host pressure resolution:0.001MPa

4. Temperature control accuracy of water tank:±0.5℃。

5. Host constant voltage range:+beyond the set value2%、 －1%(National standard)

6. Uniformity of water tank temperature:±0.5℃。

7. Host constant voltage accuracy: not less than ±1%

8. Water tank temperature resolution: 0.1℃。

9. Timing range: Instrument settings0～9999hour59 minutes and 59 seconds, software can set 20000 displays

10. Timing accuracy: superior to0.1%

11. The water tank is equipped with a short-circuit protection device made of stainless steel

12. Thickness of insulation layer for water tank: greater than83mm, less than95mm

13. Maximum diameter of the sample:110mm

14. Power supply for pressure control system:AC380VThe1.5kw

15. Temperature control system power supply:AC380VThe9kw

Performance of constant temperature water tank

1) The material of the inner liner is 2mmThick stainless steel plate.

2）85mmThe above thick insulation layer is equipped with measures to reduce thermal bridges (short circuits) and save energy through insulation.

3) All components are made of stainless steel (pipes, fittings, heaters, copper valves, etc.).

4) German Weile circulation pump, large water tank circulation capacity135l/min(Rated).

5) The temperature control system adopts branded leakage protection devices to timely protect human safety.

6) The water tank can be self circulating or connected to an external circulation system.

7) The water tank comes with a heating control system, and the pressure input port is determined by the user.

7、 Key component configuration