JLT vertical valve hydraulic test bed

Overview
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 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 deformation.
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.
8, Notes
(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.

100 type clamping cylinder pressure contrast table
 

200 type clamping cylinder pressure contrast table
 

300 type clamping cylinder pressure contrast table