The low high envelope valve of letting out of rising stem (RS.) formula
Technical field
The utility model relates to a kind of fire protection sector that is used for, level or upright the installation, and profile is " ⊥ " font, adopts the length of spring compressed piston structure; Often open at ordinary times, the medium or the residual air of slow seepage in the pipeline are discharged at any time, when system acting spurted, action sealed and exposes the autocontrol valve of caution, belongs to the fire protection linkage control field.
Background technique
The low high envelope valve of letting out among the existing GB GB25972-2010 " gas extinguishing system and parts ", rated working pressure is 6MPa, need customize joint, gasket seal with being connected of pipeline, volume is bigger than normal, construction inconvenience, cost is higher; Can not satisfy the practical applications requirement of multi-region interlock control and small space.
Of today low to let out high envelope valve outlet port runner narrow and small, and discharge amount is little, and safety coefficient is low.
The current low high envelope valve of letting out is not provided with spring, only can uprightly install and use, and adaptability is relatively poor.
Existing low let out high envelope valve events after, apical axis can not expose obvious caution.
Summary of the invention
For solve conventional low let out high envelope valve need on-the-spot pipe arrangement, discharge amount little, bear pressure low, can not level install and use, move the back and do not have the defective that exposes obvious caution.The utility model provides a kind of rising stem (RS.) formula the low high envelope valve of letting out, and is adopted as the length of spring compressed piston structure, has adapted to level and has has uprightly installed and used requirement; The apical axis stage casing diameter of axle and valve body hole adopt Spielpassung, and secondary seal ring compressive strain is spacing, have realized the performance that bounces back and reset flexibly after high pressure sealing and the decompression; Apical axis axle cylindrical is milled with flat filament, and the bottom has " one " word diversion groove, increases the sectional area of discharging; The apical axis head is inlayed the large red helmet.
The utility model is achieved in that the rising stem (RS.) formula is low and lets out high envelope valve and be made up of helmet (1), tee union body (7), valve body (3), apical axis (4), primary seal circle (6), secondary seal ring (5), spring (2).Spring is placed in the apical axis outlet section, and secondary seal ring is enclosed within the apical axis seal groove, outwards receives tension in advance, and apical axis is loaded between valve body, the tee union body, and tee union body and valve body assembling adopt the primary seal circle to keep static seal; Contacted with the outlet of tee union body by spring action apical axis bottom, keep often opening; When charging into Jie in the pipeline, medium gets into space discharge between apical axis and the valve body through tee union body inner duct; When rate-of flow surpasses design load, promote the apical axis pressure spring and move to outlet, contact with valve body circular arc sealing surface until secondary seal ring and realize sealing; When pipeline medium pressure was eliminated, apical axis was under the effect of spring, and retraction resets and keeps outlet to open wide.
The beneficial effect of the utility model is: the problem of having eliminated on-the-spot pipe arrangement, connection high pressure sealing; Discharging, reseting performance have been improved; Broken through the restriction of can not level installing and using; Increased the function that apical axis behind the valve event exposes obvious caution.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the section of structure of the utility model.
Fig. 2 is the outline drawing of the utility model.
Fig. 3 is the vital part in the utility model: the valve body sectional drawing.
Fig. 4 is the vital part in the utility model: the apical axis plan view.
Fig. 5 is the vital part in the utility model: the apical axis plan view.
Valve body: be designed to multistage pore canal, be provided with the circular arc sealing surface of secondary seal ring, be connected M14 * 1.5 internal threads with the tee union body, the valve body outer lower portion is a hexagonal, and car circle in top cooperates with apical axis stage casing diametric clearance.
Apical axis: head is provided with the hole of inlaying helmet, and inducer and outlet section cylindrical are milled with flat filament, and the stage casing diameter of axle and valve body hole adopt Spielpassung, are processed with the secondary seal ring groove, make secondary seal ring receive outside pretightening force, and the bottom has " one " word groove water conservancy diversion.
The tee union body: connect and all adopt M14 * 1.5 outside threads, 60 ° of conical surfaces seal firmly, import and export and are processed with water conservancy diversion tapering, fillet, and the middle part is a square body, is convenient to assemble clamping.
Helmet: be the large red teflon, adopt mushroom shaped, assemble with the apical axis interference.Hide in valve body hole the obvious caution of action back evagination at ordinary times.
The technological scheme that its technical problem of the utility model solution is taked is:
Press the core component-apical axis of fluid mechanics, this valve working characteristics design the utility model; Head is provided with the hole of inlaying helmet; Inducer and outlet section cylindrical are milled with flat filament, increase the discharging sectional area, and the stage casing diameter of axle and valve body hole adopt Spielpassung; Be processed with secondary seal ring pretension groove, the bottom has " one " word groove water conservancy diversion.
Embodiment
The low high envelope valve of letting out of rising stem (RS.) formula is made up of tee union body, valve body, apical axis, primary seal circle, helmet, secondary seal ring, spring.Profile is " ⊥ " font, and spring is placed in the apical axis outlet section, and secondary seal ring is enclosed within the apical axis seal groove, outwards receives tension in advance, and apical axis is loaded between valve body, the tee union body, and tee union body and valve body assembling adopt the primary seal circle to keep static seal; Contacted with the outlet of tee union body by spring action apical axis bottom, keep often opening; When charging into medium in the pipeline, medium gets into space discharge between apical axis and the valve body through tee union body inner duct; When rate-of flow surpasses design load, promote the apical axis pressure spring and move to outlet, contact with valve body circular arc sealing surface until secondary seal ring and realize sealing; When pipeline medium pressure was eliminated, apical axis was under the effect of spring, and retraction resets and keeps outlet to open wide.
1) material: tee union body and spring are stainless steel, and valve body and apical axis are Cuprum alloy, and major and minor seal ring is a butyronitrile rubber, and helmet is the large red teflon.
2) Applicable media: heptafluoro-propane, cigarette iron to the greatest extent, carbon dioxide, nitrogen, pressurized air, water.
3) applicable system: gas extinguishing system, powder extinguishing system, fine water mist fire-extinguishing system.
4) rated working pressure: 12MPa, working pressure is big, and adaptability is strong.
5) sealing load: 18MPa, non-leakage, indeformable.
6) drawoff discharge: 25L/min.
Inlet pressure when 7) being held open state: 0.05MPa-0.1MPa.
8) import and export screw thread: M14 * 1.5.
9) import and export sealing: 60 ° of conical surfaces seal firmly.
10) mounting type: upright, level is installed, and the utility model adaptability is strong.