TH68484A - Methods and equipment for leak detection used. - Google Patents

Abstract

DC60 (12/07/47) The first sealed empty 11 is built inside the inspected object (eg cylinder block 2), where the second sealed empty 12 is built outside. Object to be examined to surround the object being examined Where gases at a pressure equal to or above atmospheric pressure are fed to the first sealed space 11 and the second sealed space 12 to be sealed with an incompressible fluid. And decisions will be made To decide if there is Leaks in the object being examined or not by Detection of changes in pressure under In the second sealed space, 12 objects examined with space inside at Use as space For the containment of fluids can be examined for Find leaks in a simple manner and Accuracy, and as a result, inspection efficiency has been improved. The first sealed empty 11 is built inside the inspected object (eg cylinder block 2), where a second sealed empty 12 is built outside the inspected object to allow Surround the object to be examined Where gas at a pressure equal to or above atmospheric pressure is fed to the first sealed space 11 and the second sealed space 12 to be sealed with a compressed fluid. No, and decisions will be made. To decide if there is Leaks in the object being examined or not by Detection of changes in pressure under In the second sealed space, 12 objects examined with space inside at Use as space For the containment of fluids can be examined for Find leaks in a simple manner and Accuracy, and as a result, inspection efficiency has been improved.

Claims (10)

1. A leak detection method is used to inspect objects containing internal voids used to contain fluids, in which a first sealed void is created within the object and a second sealed void is created outside the object to surround it. A gas with a pressure equal to or greater than atmospheric pressure is fed into one of the sealed voids (i.e., the first sealed void), and an incompressible fluid is then sealed into another unsealed void. A leak is determined by detecting changes in pressure within the sealed void where the incompressible fluid is contained. 2. Method for leak detection according to claim 1, where a gas at or above atmospheric pressure is fed into the first sealed space and an incompressible fluid is sealed in the second sealed space. 3. Method for detecting leaks according to claim 1 or claim 2, where the gas at a pressure equal to or greater than atmospheric pressure is air. 4. A method for testing for leaks under claim 1 or claim 2, where the incompressible fluid is water. 5. Method for leak detection under Claim 1, whereby a procedure shall be performed to remove fluid other than incompressible fluid from a sealed space where the incompressible fluid is sealed before making a determination of whether there is a leak in the object under inspection. 6. A leak detection device is used to inspect the object under inspection, which has internal voids used to contain fluids, for leak detection. It consists of the following components: a container for the object under inspection, which encloses the object and creates a first sealed void inside and a second sealed void outside the object; a mechanism for feeding compressed gas, which pressurizes the gas into one of the sealed voids (i.e., the first and second sealed voids); a mechanism for sealing incompressible fluid, which feeds and seals incompressible fluid into either the first or second sealed void where the incompressible gas is fed; and a mechanism for determining whether a leak exists in the object under inspection by detecting changes in pressure in the sealed voids filled with incompressible fluid. 7. A leak detection device pursuant to claim 5, whereby a compressed gas feeding mechanism feeds pressurized gas into the first sealed space, and an incompressible fluid sealing mechanism seals incompressible fluid into the second sealed space. 8. Leak detection equipment as per claim 6 or claim 7, where the pressurized gas is air. 9. A leak detection device pursuant to claim 6 or claim 7, where the incompressible fluid is water. 10. A leak detection device as per claim 6, which also includes a mechanism for removing fluids other than incompressible fluids from a closed space that has been filled with incompressible fluids.