RU2019799C1 - Device for inspecting air-tightness of articles - Google Patents

Abstract

FIELD: testing for air-tightness. SUBSTANCE: sensitive element of the device is made in form of power cylinder. Lever 5 is attached to rod 3 of power cylinder by hinges. Two indicators 7 and 8 are disposed at free end of lever 5. The indicators detect displacement of rod 3. Distance between indicators 7 and 8 is determined by value of allowable leakage. Displacement transducer of rod 3 is made in form of two photodetectors 9 and 10 disposed at the same level in parallel to lever 5. Each photodetector is connected with corresponding indicator. EFFECT: improved precision. 2 cl, 1 dwg

Description

 The present invention relates to instrumentation and can be used for measuring leakage of liquid and gas.

 A device for measuring fluid leakage from a product is known, comprising a double-acting hydraulic cylinder, a pump station connected to it, an auxiliary pressure source and a control valve, a pipeline for connecting one of the hydraulic cylinder cavities to the test product, and a displacement sensor rigidly connected to the hydraulic cylinder rod, a reference tank installed in the pipeline parallel to the pipeline connected to the test product, an air removal unit connected to the valve and the test th article.

 A disadvantage of the known device is that it does not allow measuring pneumatic leaks, i.e. This measurement system is not universal and is applicable only to liquids.

 Another disadvantage is the design complexity of the known device containing a large number of intermediate elements (shut-off valves), which create additional leaks, comparable with leaks from the product.

 The aim of the invention is to increase the sensitivity of measurement of leaks, expanding the technological capabilities of the device and simplifying its design.

 This goal is achieved by the fact that in the device for determining leaks, containing a pipeline with a locking element, a sensor with a drive for moving it, an element that responds to a leak is made in the form of a power cylinder, the rod of which is connected to a lever, one shoulder of which is pivotally mounted, and on the other , at different distances from the axis of rotation of the lever, leakage detectors acting on the sensors are installed, while the free end of the lever is connected with an element transmitting force to it.

 The drawing shows a General view of the proposed device.

 The device comprises a housing 1 with a piston 2 and a rod 3 pivotally connected to the connection 4. The lever 5 acts on the connection 4, one end of which is pivotally connected to the support 6, and a force is applied to the other. The lever 5 carries on itself a signaling device 7 and 8, interacting with the elements 9, 10 of the photosensors. The latter are mounted on a platform 11, which has the ability to move under the influence of an eccentric 12, rigidly connected to the shaft of the micromotor with an integrated gearbox 13.

 The test medium through the check valve 14 enters the test product 15, connected by a pipe 16 to the housing 1. The pressure in the test product is fixed by an electrocontact pressure gauge 17.

 Device for tightness control works as follows.

 After installing the test product 15, the test medium is fed into it through the check valve 14. The test product is filled and at the same time through the pipe 16 the housing 1 is filled. Piston 2, rod 3, coupling 4 and lever 5 are in the upper position. A load is applied to the free end of the lever 5, creating a test medium pressure, which is fixed by a pressure gauge 17 and, upon the command of the latter, a command is given to the micromotor 13, which, through the eccentric 12, moves the platform 11 with the photosensors 9 and 10 up until the photosensor 9 is turned on from the signaling device 7. The micromotor stops by fixing the platform 11 to the zero position of the leak count and including the test time count. The detector 8 does not reach the photosensor 10 by the amount of leakage.

 If there are leaks in the product, the lever 5 begins to lower, and if, for a certain time, the indicator 8 does not turn on the photosensor 10, then a “Good” signal is issued. If the photosensor 10 is triggered by the signaling device 8, then the signal "Marriage" is issued.

 Thus, the proposed device for monitoring the tightness of products allows us to simplify the design, increase the accuracy of the test and expand technological capabilities due to the following factors: the use of a movable platform with photosensors allows you to compensate for tolerances on the linear dimensions of the tested product, as well as to compensate for the effect of backlash in the joints, the possibility of deformation lever in loaded points; the presence of photosensor elements on the platform allows to reduce the accuracy of the tightness control, due to the fact that the signaling devices are installed on the lever arm (for example 10: 1); This device design allows the tightness control of products as a gas test medium, and a liquid with high pressures. It is simple, reliable, allows you to automate the control process.

Claims (2)

 1. DEVICE FOR MONITORING PRODUCTS, containing pipelines with locking elements, a sensing element made in the form of a power cylinder with a piston and a rod and connected to the pipeline, a rod displacement sensor and a force element acting on the rod, characterized in that, in order to increase sensitivity , it is equipped with a lever mounted at one end on the rod pivotally perpendicular to the last, two rod movement signaling devices located on the free end of the lever at a distance from each other, elyaemom value allowable leakage power element is to act on the free end of the lever rod displacement sensor is designed as a two photodetectors disposed at the same level, parallel arm, each of which is associated with a corresponding signal transmitter rod displacement.  2. The device according to claim 1, characterized in that both photosensors are located on a platform mounted with the possibility of movement along the rod.