A kind of pipe volume pressure differential method tester
The present invention relates to a kind of detection device revealed about product, a kind of pipe volume pressure differential method tester.
Tradition needs to ensure the leakage of the product (generally referring to the parts of pneumatic control here) of sealing, is primarily present two kinds of situations: product itself leaks out the leakage between interiors of products passage.The latter can be led in water by connecting line, judged by the way of water inspection, the outside micro-leakage detection of product itself is then difficult problem, especially contour structures is complicated and there is the product of control circuit, because port without run-on can guide gas leakage, product can not be put in water.Therefore during batch production, effective rapid detection method of product leakage, become key subjects and confront.
Method is simple in water inspection, is widely used, but can only qualitative detection cannot quantitative determine.The most also have in the method used: special gas detection and sealed volume manometric method.The former uses in production scene limitation, environment is existed and pollutes and can only qualitative detection can not quantitative determine, the latter can quantitative determine, but require time for waiting pressure change, and equipment cost relatively high investment is bigger, producing effect the highest, on streamline, batch detection there is also difficulty.
Summary of the invention
For the problems referred to above, the present invention provides a kind of pipe volume pressure differential method tester, according to water inspection method and the operation principle of sealed volume manometric method, takes respective length, merges water inspection method and sealed volume manometric method is integrated and designs and produces.Leakage to product detects, and need not put in water by product, just can fast qualitative detection leak, again can quantitative determination leakage rate.
The present invention is achieved by the following technical solutions: a kind of pipe volume pressure differential method tester, including workbench, control circuit, described control circuit is arranged in the back side of workbench, constant-pressure gas storage tank is installed on described workbench, pressurize container, fixed station, water checking device, the import of described constant-pressure gas storage tank picks gas port by extracapillary, the outlet of described constant-pressure gas storage tank connects pressurize container by capillary, in described pressurize container, differential pressure indicator is set, the import of described differential pressure indicator is connected with pressurize container, the outlet of described differential pressure indicator is by the import of capillary connection fixed station, the outlet of described fixed station is by the import of capillary connection water checking device, test sample is placed on described fixed station, described constant-pressure gas storage tank, pressurize container, fixed station, water checking device all electrically connects the control circuit at the back side, it is uniformly controlled by it.
As preferably, between described constant-pressure gas storage tank and pressurize container, Pressure gauge is set, four-way is installed in described manometric outlet, the outlet of described four-way one tunnel connection constant-pressure gas storage tank, one tunnel connects manometric outlet, the import of one tunnel connection pressurize container, a road connection is provided with the capillary of valve B, described in be provided with the capillary of valve B and be interconnected by threeway with the outlet of described differential pressure indicator, the import of fixed station.
As preferably, the import of described constant-pressure gas storage tank arranges total valve A, and the outlet of described fixed station arranges two-way capillary, and two-way capillary is respectively equipped with valve C and valve D, and described two-way capillary all connects water checking device.
As preferably, described constant-pressure gas storage tank is fixed on backboard by fixed band.
Preferably, described fixed station is L-shaped, and the horizontal plane of described fixed station fixes articles holding table, described articles holding table is used for placing test sample, described articles holding table be arranged over clamping device, described clamping device is fixed on the vertical plane of fixed station, and described clamping device can be up and down.
Preferably, described clamping device lower end arranges compact heap, and wherein compact heap uses quality of rubber materials.
After this invention takes abovementioned technology, its beneficial effect is notable: with capillary, constant-pressure gas storage tank, pressurize container, differential pressure indicator, water checking device and test sample are linked together, differential pressure indicator is placed in pressurize container, guarantee that differential pressure indicator is not subject to too high pressure reduction, the operating pressure of Pressure gauge instruction workbench, valve and control circuit forming control system control each several part and normally work, and constant-pressure gas storage tank ensures the air pressure of test loop.Due to the fact that and be integrated with water inspection method and two kinds of leak hunting methods of pressure differential method, can qualitative detection can quantitatively detect again, more various single leak hunting methods, the operational effectiveness of pipe volume pressure reduction testboard detection has raising greatly, per minute can test 6-10 product, operating efficiency is high, and its economic benefit is obvious.Do not pollute, safe and reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1.
In figure, 1 is fixed band, and 2 is backboard, and 3 is constant-pressure gas storage tank, 4 is Pressure gauge, and 5 is capillary, and 6 is differential pressure indicator, 7 is pressurize container, and 8 is fixed station, and 9 is clamping device, 10 is compact heap, and 11 is water checking device, and 12 is articles holding table, 13 is workbench, and 14 is total valve A, and 15 is valve B, 16 is valve C, and 17 is valve D.
Detailed description of the invention
Below against accompanying drawing, the present invention is further illustrated in conjunction with the embodiments.
nullWith reference to as shown in Figure 1，A kind of pipe volume pressure differential method tester，Including workbench 13、Control circuit，Control circuit is arranged in the back side of workbench 13，Constant-pressure gas storage tank 3 is installed on workbench 13、Pressurize container 7、Fixed station 8、Water checking device 11，The external air taking port of capillary 5 is passed through in the import of constant-pressure gas storage tank 3，The import of constant-pressure gas storage tank 3 arranges total valve A14，This constant-pressure gas storage tank 3 is fixed on backboard 2 by fixed band 1，The outlet of constant-pressure gas storage tank 3 connects a four-way by capillary 5，Other three tunnels of four-way are respectively as follows: the outlet of a road connection Pressure gauge 4，The import of one tunnel connection pressurize container 7，One tunnel connection is provided with the capillary 5 of valve B15，Wherein Pressure gauge 4 is between constant-pressure gas storage tank 3 and pressurize container 7，Differential pressure indicator 6 is set in pressurize container 7，The import of differential pressure indicator 6 is connected with pressurize container 7，The outlet of differential pressure indicator 6 and the capillary 5 being provided with valve B15 are communicated in a threeway，The import of another road connection fixed station 8 of threeway，The outlet of fixed station 8 arranges two-way capillary，Valve C16 and valve D17 it is respectively equipped with on two-way capillary，This two-way capillary all connects water checking device 11，Fixed station 8 is L-shaped，Articles holding table 12 is fixed on the horizontal plane of fixed station 8，Articles holding table 12 is used for placing test sample，Articles holding table 12 be arranged over clamping device 9，Described clamping device 9 is fixed on the vertical plane of fixed station 8，It can be up and down，Here clamping device 9 is with the handle pressed down on，The lower end of handle connects catch bar，The lower end of catch bar arranges compact heap，Wherein compact heap uses quality of rubber materials，Compact heap for steadily being pressed on articles holding table 12 by test sample.Above-mentioned described constant-pressure gas storage tank 3, pressurize container 7, fixed station 8, water checking device 11, Pressure gauge 4 etc. all electrically connect the control circuit at the back side, the switch of 4 valves of control circuit major control, it be uniformly controlled.
Product work principle: after test sample is fixed on articles holding table, open total valve A connect and adjust measuring air pressure, allow the capillary on workbench, constant-pressure gas storage tank, pressurize container, differential pressure indicator is full of the compressed air of certain pressure, after the system air pressure shown until Pressure gauge reaches test request, Open valve B and be separately turned on valve C and valve D, check whether test sample inner passage leaks gas by water inspection method, whether leak gas inside first qualitative observation test sample, it is then shut off all valves, control valve C and valve D successively, the pressure oscillation observing differential pressure indicator determines test sample leakage to external world, play quantitative observation.
Control circuit in the present invention is furnished with the Switching Power Supply of 24V, has timing unit, protection control unit, data processing unit, display unit in control circuit.Workbench is provided with 4 buttons; 4 buttons connect the control circuit at the back side; 4 buttons send manual operation instruction; being provided with station sensor, and the pressure sensor of Pressure gauge preparation on articles holding table, above-mentioned each output order gives protection control unit; protection control unit provides air inlet control, detection controls, protection control signal; thus control each magnetic valve and perform switch, by data processing unit, display unit, the visible numerical value of display.
The listed above specific embodiment being only the present invention, it is clear that the invention is not restricted to above example.All deformation that those of ordinary skill in the art can directly derive from present disclosure or associate, all should belong to protection scope of the present invention.