Performance testing method of valve needle type bolt stretching and leveling device
A testing method and leveling technology, applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc.
Pending Publication Date: 2021-12-21
常州格林电力机械制造有限公司
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is: in order to solve the problem of how to verify the performance of the valve needle type bolt tension leveling device, the present invention provides a performance testing method of the valve needle type bolt tension leveling device, through the action function test , automatic reset function test, adjustment accuracy test, pressure holding test, overload test and fatigue test can effectively test the performance of the valve needle type bolt tension leveling device
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[0028] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them.
[0029] Such as figure 1 and figure 2 Shown, a kind of performance test method of valve pin type bolt tension leveling device, comprises the following steps:
[0030] S1: Check before the test, check whether the marks, signs, and surface of the leveling device 1 are bumped and scratched, whether the bolts are loose, and whether there is oil leakage; For repairs, the bolts are loose and need to be tightened, and oil leakage needs to be repaired;
[0031] S2: Action function test. The actuator 21 of the test bench system 2 applies a constant and continuous load to the leveling device 1. The load is not greater than 300KN. Smooth ejection and whether the load is displaced; record the test results to facilitate the pe...
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The invention belongs to the technical field of nuclear power plant bolt stretcher testing, and relates to a performance testing method of a valve needle type bolt stretching leveling device, which comprises the following steps: S1, checking before testing; S2, testing action functions; S3, testing automatic reset function: testing whether the piston rod is automatically reset; S4, adjusting accuracy test: under the rated load of 30t, switching on the electric magnet on in a single inching manner, enabling the switching-on time to be within 3s, and measuring the single inching falling adjusting accuracy in the whole stroke range; S5, conducting a pressure maintaining test, under the rated load of 30 t, keeping the stroke of the piston within 75 mm, conducting standing for 1 h, and measuring and recording the displacement of the piston rod of the levelness adjusting device; S6, testing overload; S7, conducting fatigue testing, under the rated load of 300 kN, switching on an electric magnet on in an inching mode, making the levelness adjusting device to do inching, wherein the interval after each inching is at least 1 s; and S8, analyzing and checking after all tests are finished. By means of the testing method, the performance of the valve needle type bolt stretching and leveling device can be effectively tested.
Description
technical field [0001] The invention relates to the technical field of bolt tensioner testing in nuclear power plants, in particular to a performance test method of a valve needle type bolt tensioning leveling device. Background technique [0002] The bolt hydraulic tensioner is referred to as the bolt tensioner. It uses the hydraulic source provided by the ultra-high pressure oil pump of the hydraulic booster pump to determine the tensile force according to the tensile strength, yield coefficient and elongation of the material. Force, so that the applied bolt is elongated in its elastic deformation zone, and the diameter of the bolt is slightly deformed, so that the nut is easy to loosen. In addition, it can also be used as a device for applying axial force in hydraulic interference connection for top pressure installation. [0003] At present, the traditional bolt tensioner leveling device has been monopolized by foreign countries for a long time, and the external valve bo...
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IPC IPC(8): G01M13/00
CPCG01M13/00
Inventor 周勋卢小青曹中芹袁印如
Owner 常州格林电力机械制造有限公司