Sealing test method for rubber sealing ring of prestressed concrete tube
A technology of rubber sealing ring and test method, which is used in fluid tightness test, machine/structural component test, measurement device, etc., can solve problems such as insufficient data, increase engineering cost, construction difficulty, etc., and achieve intuitive and convenient data. Data collection, the effect of reducing the investment in equipment and products
Inactive Publication Date: 2012-03-21
TIANJIN ZEBAO CEMENT PROD
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AI Technical Summary
Problems solved by technology
[0004] 1. The specifications and hardness of the apron need a large number of tests to determine. Many designers have to double the safety factor in the selection of engineering parameters due to insufficient test data. This will not only cause difficulties in construction, but also Increased engineering cost
[0005] 2. To carry out hydrostatic test, special test equipment is required, and qualified pipes are required, and the investment in equipment and products is relatively high.
[0006] 3. Since the test is carried out in an ideal test state, it does not meet the actual operating conditions of the pipeline, and it is easy to cause design hidden dangers to the project
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0011] A test method for the sealing performance of rubber sealing rings for prestressed concrete pipes, the test process is:
[0012] 1. Cut out the 600mm apron groove and seal both ends of the apron groove. The purpose is to simulate the actual working environment of the apron at the engineering site, avoid rubber overflowing along the openings at both ends of the apron groove during compression, and ensure that the apron It was kept in an airtight state throughout the experiment.
[0013] 2. Stretch the intercepted apron to 600mm according to the specified stretching ratio, and fix it in the apron groove sealed at both ends. Use a caliper to measure the height of the apron exposed from the apron groove, and then place the apron installed The apron groove is placed on a universal testing machine with a 600mm long platen.
[0014] 3. Turn on the universal testing machine, slowly compress the apron, and measure the compression amount of the apron every time the testing machin...
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A sealing test method for a rubber sealing ring of a prestressed concrete tube is finished according to following steps of 1 cutting out a rubber ring groove, and sealing two ends of the rubber ring groove; 2 cutting out a rubber ring with the same length as the rubber ring groove, fixing the rubber ring in the rubber ring groove with two ends sealed, measuring the height of the rubber ring extending out of the rubber ring groove by using calipers, and then placing the rubber ring groove with the rubber ring on a universal testing machine with a long pressing plate; 3 starting the universal testing machine, slowly compressing the rubber ring, and measuring compression amount of the rubber ring every time when 20 KN is increased in the testing machine until the compression amount of the rubber ring doesn't change; 4 drawing a curve graph of compression stress of the rubber ring and installation clearance. Thus, project planners can select rubber ring types meeting engineering requirements according to situation of external load of pipelines. The method is simple to operate, accurate in testing conclusion and low in testing cost.
Description
Technical field: [0001] The invention belongs to a method for detecting the sealing performance of equipment, in particular to a method for testing the sealing performance of a rubber sealing ring for a prestressed concrete pipe. Background technique: [0002] At present, the selection of the diameter and hardness of the rubber sealing ring (hereinafter referred to as the rubber ring) during the installation of domestic prestressed steel cylinder concrete pipes mainly depends on a large number of hydraulic tests. The main method is to install aprons of different diameters and hardness into the apron grooves of prestressed steel cylinder concrete pipes, and then test the tightness of the aprons under specified pressure after the pipes are butted. The pipe with a single rubber ring is subjected to a joint tightness test on a special hydraulic testing machine. The pipe with double rubber rings uses the pressure hole reserved in the middle of the two rubber rings to pressurize ...
Claims
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IPC IPC(8): G01M3/00
Inventor 王明泽尹秋成李良
Owner TIANJIN ZEBAO CEMENT PROD