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JWZ type valve hydraulic test bed that I have accumulated many
years of production in the valve technology, based on the testing
equipment in accordance with national GB/T1 3927 - 92 "Valve
Inspect and Test" and ZBJl6006-90 "valve testing and detection"
Standard specifications, designed to improve a new generation of
JWZ hydraulic valve test bench.
The machine has a set of mechanical and electrical, hydraulic,
pressure, liquid medium recycling in one store, with fully
functional, stable performance and high degree of automation. Is
widely used in the field of DN l 5-1000mm of straight-through
flange and the thread connecting all kinds of high, medium and low
pressure valves strength, sealing and leakage, and other
performance tests. Test medium: water, gas, oil. The maximum seal
test pressure 32.0MPa, intensity of 480MPa.
Machine the entire process from the hydraulic transmission,
electrical control valves of the subjects were free of any
additional external forces affect the test results. Greatly improve
work efficiency and reduce labor intensity, is the ideal equipment
for the making industry and the use, maintenance and other units in
advanced testing equipment for valve testing.
2, Working principle and structure
JWZ-based test bed to adopt a valve flange face orientation,
activity against the back of the clamping claws clamping flange
methods work. Valves no additional effect on the measured test
results of the external forces, in line with national standards
require that the valve test requirements.
The machine structure can be divided into the hydraulic system,
electrical control systems, about the activities table for the
clamps and hydraulic pressure devices and media, the composition of
the circulatory system and other components. Table with the right
institutions and the 90-degree flip clamp body by a clamping
mechanism clamps the clamping device and radial composition of
mobile devices, clip claws of the clamping device is used to
directly drive the cylinder to achieve, so that The claw force
uniform, clamping and reliable. Radial grippers mobile device is a
lever-type structure, to achieve simultaneous radial movement of
each claw. On the left table can automatically advance and retreat.
And have good performance, simple structure, compact and so on.
Hydraulic electric control system (see hydraulic and electrical
schematics) installed at the bottom of fixation, the control
section is a test station, jointly with the electrical under the
control of government agencies to coordinate actions to meet the
test program requirements.
3, Use, notes and requirements
(1), equipment installation: the school placement level or your
equipment fixed with concrete footing bolts.
(2), selection of N32-46 # Normal hydraulic oil, N32-46 # anti-wear
hydraulic oil, or 20-30 # mechanical oil, into the fuel tank, fuel
can not be less than the lower limit of the oil level gauge.
(3), connect the power, press the start button pump, check the
motor rotation direction is correct (clockwise direction) to 5-1
O-minute no-load running, adjust oil pump pressure in the 5 0MPa
test-machine, all kinds of action, to check whether the pipeline
leak was found negative phenomena should immediately stop excluded.
(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 less than the
test pressure of 15 times the accuracy of not less than 1.5.
. The test bed should be kept clean, clean, was test valve
flange and sealing disc set does not allow any of its debris,
always check the damage to O-State.