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JLT vertical valve hydraulic test bed is my company to address the
general use of units for the valve test bench for multi-type choose
to use needs, according to the national GB/T1 3927 - 92 "Universal
valve pressure test" and ZBJl6006 - 90 "valve testing and
detection" standard for the design and manufacture of vertical
valve testing equipment. The test bed advanced technology, perfect
function, structure, smart, practical and easy to adapt to all
kinds of high, medium and low pressure valves and threaded valve
seal strength 'performance tests.
Working principle and structure of
JLT-based test bed by the activities of the top clamps and
hydraulic cylinder pressure method combining performance tests of
various types of valves, the valves were tested without additional
external forces affect the test results, in line with national
standard valve testing requirements. The aircraft structure is
divided into the hydraulic system, electrical control systems,
working platforms and hydraulic clamping device for moving media
storage devices and liquid recycling system, etc.. Table clamping
device consists of hydraulic cylinder direct-drive to achieve, so
that the clip claw force uniform, clamping and reliable clamping
device to the mobile capabilities through the traction rod formed
by a hydraulic cylinder, the achievement of the clip claw radial
synchronization mobile work. Table top clamping device set up the
activities of beams, the main column. From the roof beams on the
hydraulic cylinder pressure is not the achievement of the variety
of different valves strength test. The machine has a water, gas,
oil sealing performance and strength properties of the test. The
machine used to seal the valve flange face to do positioning of the
radial movement by the working table clamps to control the valve
flange sizes were tested, and then clamps are pressed by the axial
clamping method on the back of the valve flange to achieve test all
kinds of different diameter size of the valve sealing test.
Using note and requirements
1, Equipment installation: the school placement level or your
equipment fixed with concrete footing bolts.
2, Choose N32 - 46 # regular hydraulic oil, N32 - 46 # anti-wear
hydraulic oil, or 20 - 30 # machine oil into the fuel tank, fuel
can not stem the oil level gauge with low threshold
3, connect the power, press the start button pump, check the motor
rotation direction is correct (clockwise direction) for 5 - 10
minutes no-load running, adjust oil pump pressure 5.0MPa to test
machines, all kinds of action, to check whether the flood vent pipe
and found that negative phenomena, should immediately stop
4, test medium: water is convenient and does not pollute the
environment, etc., which are widely used, to ensure no erosion of
the valves were tested and in the media, the requirements of the
testing machine. In the tank, add rust inhibitor, or used for
testing the oil medium.
5, Test valve, the first valves were tested under the test
pressure, insisted that "the pressure needed to compress cylinder
control table" in the hydraulic clamping system pressure value, to
boost pressure regulation, the value of super-boost pressure is
strictly prohibited high, and prevent damage to test the valve
6, Hydraulic pump for the pressure to work before conditioning and
being a good electric contact pressure gauge pressure pilot valves
the same, and then to work. Cast iron valve not use the hammer, the
valve in the experiment, the operator should pay attention to
safety, proper use, with particular attention when the test medium
pressure cast iron valves too damaged, valve testing is completed,
the valve should be ranked after exhausting internal pressure can
be relaxed axial press.
7, Pressure gauge testing devices must be approved by the local
department accreditation of its measurement certificate shall be
valid, the pressure gauge of the range can not be low-stem test
pressure 15 times the precision is not a low dry 1.5.
(1)The test bed should be kept dry; fight, clean and test the valve
by sealing plate flange and not allowed to have their fixed debris,
always check the O-ring damage.
(2). Test bed activities of the various components of Office,
should always refuel and maintain clean lubrication to use.
(3). Hydraulic oil should be regularly inspected, the replacement
of new equipment put into use, so that both the cleaning tank 3
months, replaced with new oil, after cleaning and replacing every
other year, once the oil level gauge oil can not be less than the
lower limit of the fuel tank the temperature inside the oil should
not exceed 55 Degree C.
How to use?
First, subjects were clamping valve
Before the test, the hydraulic system pump pres