JWZ-type valve hydraulic test bench Overview:
JWZ-type valve hydraulic test bench is a new generation of JWZ-type hydraulic valve test bench in accordance with the national GB / T1 3927-92 "universal valve pressure test" and ZBJl6006-90 "valve testing and testing" standard specification requirements.
The machine set of mechanical and electrical, hydraulic, pressure test, the liquid medium storage cycle used in one, with a fully functional, stable performance, high degree of automation and so on. Widely used in the nominal diameter DNl 5-1000mm through the flange and thread connection of various types of high, medium and low pressure valve strength, sealing and leakage and other performance tests. Test medium: water, gas, oil. The maximum seal test pressure 32.0MPa, strength 48 0MPa.
JWZ-type valve hydraulic test bed by the whole process of hydraulic transmission, electrical control, the test valve without any additional impact test results of the external force. Greatly improve work efficiency and reduce labor intensity, the valve manufacturing and use, valve maintenance and other units of a advanced and ideal valve test equipment.
JWZ valve hydraulic test bench working principle and structure:
JWZ-type test bench with valve flange end positioning, anti-claw clamped activities on the back of the flange clamping method work. No additional test results of the valve on the external force, in line with the national standard valve test requirements.
The structure of the machine can be divided into hydraulic system, electrical control system, about the activities of the table and the hydraulic jaw pressure device and medium circulation system components. The right table is provided with a clamping mechanism and a 90-degree turning mechanism. The clamping mechanism is composed of a clamping device of a clamping jaw and a radial moving device. The clamping device of the clamping jaw is realized by direct drive of each hydraulic cylinder, Even force, reliable clamping. The radial movement of the jaws adopts a lever structure, so that each jaw moves in a radial direction synchronously. The left table can move forward and backward automatically. And has good performance, simple and compact structure and so on. Hydraulic electrical control system (see hydraulic and electrical schematics) installed in the bottom of the fixed frame, is the control part of the test bed, under the joint control with the electrical and mechanical so that agencies can coordinate the action to meet the test program requirements.
JWZ valve hydraulic test bench Notes and requirements:
First, the installation of equipment: a good school equipment placement level or with concrete anchor bolts.
Second, use N32-46 # ordinary hydraulic oil, N32-46 # anti-wear hydraulic oil or 20-30 # mechanical oil, into the fuel tank, the fuel can not be lower than the lower limit of the fuel gauge.
Third, the power, press the pump start button, check the motor direction of rotation, is correct (clockwise) for 5-1 O minutes after no-load operation, adjust the pump pressure test machine at 50MPa, various actions, check each Pipeline leakage, found that the phenomenon of bad, should be immediately shut down to exclude.
Fourth, the test medium: water has the advantages of convenience, does not pollute the environment, which is widely used, to ensure that the valve will not be corroded and tested in the media requirements required. In the tank, add rust inhibitor or common oil as test medium.
Fifth, the test valve, the first test valve under test pressure, requiring reference to "compaction cylinder pressure required pressure table" in the pressure hydraulic system pressure, supercharger pressure control, non-supercharger pressure is super high, to prevent being Test valve deformation damage.
Sixth, hydraulic pressure pump Before starting to work, first adjust the pressure gauge and the electrical contact pressure is the same as the test valve, and then work.
Cast iron valve shall not be pounding, the valve in the test, the operator should pay attention to safety, proper use, with particular attention to test the cast iron valve medium pressure is too high damage, the valve test is completed, the valve pressure should be drained to relax the axial press.
Seven, pressure test device pressure gauge must be certified by the local measurement department of the certificate should be valid, the pressure gauge range can not be less than 15 times the test pressure, the accuracy of not less than 1.5.
JWZ valve hydraulic test bench Note:
1. The test bench face should be kept clean, clean, test the valve flange and seal plate, not allowed to have its own debris, always check the O-ring damage.
2 test station activities of the various components, to always refuel, keep clean and use lubrication.
3, hydraulic oil to be regularly checked, replace the newly put into use the equipment, so that 3 months both to clean the fuel tank, replace the new oil, after cleaning and replacement every once a year, the fuel can not be less than the lower limit of the oil level gauge, Oil tank temperature can not exceed 55 ~ C.
JWZ valve hydraulic test table appearance diagram
JWZ valve hydraulic test table appearance diagram
JWZ valve hydraulic test bench using the method of operation:
First, the test valve folder
According to the test bench model select the test valve with a large diameter, adjust the test station left work clamp position, the test valve on the left side of the test bench clamping table seal plate center, move the button, The pressure claw into the valve to be tested behind the back of the flange the correct position, press the button in the PN hydraulic pressure system, press the button, adjust the pressure and the pressure required to close the fuel tank table diameter of the valve, Pressure, PN value the same, everything is correct, closed. Can be used to test the valve seal test.
Second, water pressure, the use of pumps
Adjust the water pressure gauge electrical contacts, open the pump switch, the first test the valve filled with water, low pressure gauge O 5MPa water is full, turn off the pump switch off. Then press the adjustment of water supply pump pressure control valve, the liquid pressure test pressure and the test valve seal pressure and electrical contact pressure gauge the same value, the high-pressure pump automatically shut down. Holding pressure for a few minutes, no drop in the pressure gauge, the test seal is completed, open, the pressure relief valve will be tested, zero, you can relax the test valve or continue to strength test.
Third, the test valve strength test fixture
Valve seal test is completed, continue to make strength test, the left clamping unchanged, adjust the right to the test rig clamping device, press the button, the mobile frame at one end of the main plate sealing disc, into the other end of the valve flange Collision, with reference to the left-hand program, the right end of compression, and the control of hydraulic clamping system pressure PS value the same, open the test valve seal, the reference
Fourth, the test valve gas seal test method for gas seal test, the seal can only be tested on the left side of the left side of the main work of the rotating 90-degree plane up, then the button, then step by step, will be type valve is installed, closed c water switch, pressure relief switch, right into the water. Open the c gas switch, air switch, immediately to the other end of the valve under test, into the water, observe the test valve sealing performance and air bubbles. Turn off the test is completed, barometer pressure is zero, then the test valve removed.
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