Automatic protective device for flow overload of fluid pipeline
A technology for fluid pipelines and automatic protection, which is applied to valve devices, engine components, safety valves, etc., and can solve problems such as inability to fully meet actual use requirements, inaccuracy, and unstable control value of automatic shutdown of flow overload
Pending Publication Date: 2017-07-28
李国栋
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Problems solved by technology
[0002] Existing automatic flow overload protection devices for fluid pipelines have complex structures, and the control value of flow overload automatic shutdown is unstable, inaccurate, and cannot fully meet the actual use needs.
Method used
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Embodiment Construction
[0012] see figure 1 and figure 2 , The present invention is an automatic protection device for fluid pipeline flow overload, which includes a cylinder liner 1, an outlet end cover 2, an inlet end cover 3, a valve body 4 and a flow limiting element 5. Wherein, the cylinder liner 1 is a hollow cylinder, and its inner wall is provided with an annular groove 11; the outlet end cover 2 and the inlet end cover 3 are respectively connected with the cylinder liner 1 by connecting bolts 6 to form a Accommodating space 7; the inlet end cover 3 is provided with a fluid inlet 31 in the center, and the outlet end cover 2 is correspondingly provided with a fluid outlet 21; further, the outlet end cover 2 and the cylinder liner 1, and the inlet end cover 3 and the cylinder Sealing elements 8 are respectively provided between the sleeves 1 .
[0013] The valve body 4 is placed in the capacity space 7 and can slide axially in the cylinder liner 1 . The valve body 4 is provided with an axia...
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The invention discloses an automatic protective device for flow overload of a fluid pipeline. The automatic protective device comprises a valve rod and a flow limiting element, wherein the valve body is provided with an axial through hole, an axial counter bore and a radial through hole; the valve body is arranged in an accommodating space defined by a cylinder sleeve, an inlet end cover and an outlet end cover; a pressure spring is arranged in the radial through hole of the valve body; the two ends of the pressure spring separately abut against round balls; a pressure spring is arranged in the axial counter bore of the valve body; the flow limiting element is arranged in the inlet end cover; during flow overload of the fluid pipeline, the flow limiting element overcomes acting force of the pressure spring in the axial counter bore of the valve rod to fit to the bottom of the valve body under action of pushing of a fluid, so that the axial through hole of the valve body is sealed, pressure difference at the two ends of the valve body is quickly increased, and the valve body quickly fits to the outlet of the outlet end cover to realize automatic closing of the protective device. When the protective device is closed, a ring-shaped groove in the cylinder sleeve generates normal acting force, along contact surfaces of the cylinder sleeve and round balls, on the round balls under action of the pressure spring arranged in the radial through hole of the valve body, so that sealing pressure for the valve body and the outlet in the outlet end cover is further increased.
Description
technical field [0001] The invention belongs to safety protection facilities, and relates to an automatic protection device for flow overload of a fluid pipeline, in particular to a device for quickly and automatically closing the pipeline without external power when the flow of the fluid pipeline is overloaded. Background technique [0002] Existing automatic flow overload protection devices for fluid pipelines have the defects of complex structure, unstable and inaccurate flow overload automatic shutdown control value, and cannot fully meet actual use requirements. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an automatic protection device for fluid pipeline flow overload in view of the above-mentioned deficiencies in the prior art. [0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an automatic protection device for fluid pipeline flow overlo...
Claims
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CPCF16K17/32
Inventor 李国栋
Owner 李国栋