High-pressure multi-stage step-down cage balance type angle valve
The utility model relates to a kind of high-pressure multi-stage step-down cage balance type angle valve, is particularly suitable for using in High Pressure Difference industrial fluids, gas, gas-liquid mixed phase system, plays and regulates and the shutoff effect, belongs to the automatic control technology field.
In the prior art, especially in industrial fluids power conduit system, valve is primary element of realizing whole system automation control.What its assurance system controlled is safe, instant and effective, and central topmost factor is the operation of pressure adjusting and flow control valve, and can not cause the infringement of valve body and system under any mode of operation.It is the problem place that this field domestic demand solves.
On conventional control valve especially high pressure angle valve, exist common problem to be: 1, under the High Pressure Difference situation, the multistage step-down spool of general double seat or multiple seat type sealing configuration sealability is difficult to guarantee that reason is will guarantee simultaneously relatively difficulty of two or more sealing surface performances under certain Stroke Control.2, under the High Pressure Difference situation, general double seat seal spool structure easily produces vibration under the washing away of fluid, and valve rod is easily broken.3, under high-pressure situations, the processing medium flow velocity is very fast, easily produces and washes away and cavitation phenomenon.4, under the High Pressure Difference situation, flow velocity is very fast, and vibrations are severe that adjusting function is all had very big influence, and noise is very big, serious environment pollution.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, thereby a kind of high-pressure multi-stage step-down cage balance type angle valve is provided, and can realize efficient sealed, step-down performance; The optional internals of energy combination in any, protection against erosion air defense voltinism can be good especially, and control is steadily reliable.
The technological scheme that provides according to the utility model, high-pressure multi-stage step-down cage balance type angle valve comprises actuator, body, valve rod, loam cake, valve seat, valve body, actuator be installed in body on cover, connect by round nut, valve seat is installed on the valve body, feature is: the first throttle cover and second orifice sleeve are installed on the described valve seat, gland is pushed down the first throttle cover and second orifice sleeve, last sealing cushion for cover is installed between valve body and the gland, gimbal is installed in the groove of gland and first throttle cover, valve rod is threaded with valve plug, pin by straight pin, the Packing seat of packing into successively in the described valve body stuffing box, the filler spacer, filler on chip and thread filler are installed Gland and hold-down grid on the described thread filler successively, and hold-down grid is fixed by bolts to and covers.
Described valve plug sealing surface bottom is provided with guiding gutter.Described gimbal adopts metallic material or nonmetallic material to make.
Compared with the prior art the utility model has the following advantages:
The utility model is because the trim seal form adopts the sealing of single seat guiding type, guarantee that sealing surface can steadily contact, can play good sealing effect, soft seal can reach the VI level, hard sealing can reach V or VI level, the use of balance type trim simultaneously greatly reduces valve plug top and bottom pressure reduction, regulates control steadily, reduces vibration.
2, because the heap face seal is adopted in the sealing of trim seal valve seat, pilot seal replaces two-seater sealing in the past, because the soft seal that gimbal adopts metallic material to make hard sealing or adopt nonmetallic material to make, the multi-form gimbal of soft seal and hard sealing all can play good sealing effect.
3, because the sleeve that matches with valve plug in the design of internals adopts split type, valve seat adopts fast assembling ﹠ disassembling, easy for installation flexible, and can the orifice sleeve that quantity does not wait be installed according to specific requirement, the main step-down noise reduction effect that rises, also can play good effect to the anti-cavitation of vibrationproof, the sleeve of different adjustment window can certainly be installed according to different control characteristics.
4, owing to be provided with guiding gutter in valve plug 14 sealing surface bottoms, require to be provided with the guiding gutter that population size does not wait according to different pressure reduction, though through the medium of orifice sleeve throttle orifice by step-down but speed is still very fast, easily spool valve body is washed away, the effect of guiding gutter at this moment just is to change the flow direction of medium, makes it at the certain swirling flow consumed energy of the inner formation of runner.
Description of drawings
Fig. 1 is the utility model structural front view.
Fig. 2 is the utility model body portion A-A sectional view.
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
As Fig. 1～shown in Figure 2, comprise actuator, body 2, valve rod 3, hold-down grid 4, Gland 5, thread filler 6, laminal filter 7, oil filler plug 8, filler spacer 9, Packing seat 10, loam cake 11, go up sealing cushion for cover 12, gland 13, valve plug 14, valve seat 15, first throttle cover 16, second orifice sleeve 17, straight pin 18, gimbal 19 and valve body 20 etc.
The utility model mainly is made up of actuator 1 and body 2 two large divisions.The utility model adopts actuator 1 to be installed on the loam cake 11 of body 2, connect by round nut, in the main body body 2, valve seat 15 is installed on the valve body 20, first throttle cover 16 and second orifice sleeve 17 is installed on the described valve seat 15, gland 13 is pushed down first throttle cover 16 and second orifice sleeve 17, loam cake 11 is contained on the valve body 20, fixing with bolt 21, last sealing cushion for cover is installed between valve body 20 and the gland 13, gimbal 19 is installed in the groove of gland 13 and first throttle cover 16, valve rod 3 is threaded with valve plug 14, pin by straight pin 18, the Packing seat 10 of packing into successively in described valve body 20 stuffing boxes, filler spacer 9, filler 7 on chip and thread filler 6 are installed Gland 5 and hold-down grid 4 on the described thread filler 6 successively, and hold-down grid 4 is used bolt, nut 22,23 are fixed on the loam cake 11, in order to fixing Gland 5, thread filler 6 and filler spacer 9 are equipped with oil filler plug 8 on the loam cake 11.
Working principle of the present utility model and working procedure:
On the process pipe device, the high-pressure process medium enters in the utility model one side runner, through entering valve plug 14 outsides after the 17 twice step-downs of first throttle cover 16 and second orifice sleeve, the circulation area that moves up and down the may command processing medium, flow and the speed of valve plug 14, thus technological requirement guaranteed.After processing medium goes out first throttle cover 16 and second orifice sleeve 17, through stopping and drainage consumption portion of energy of valve plug 14 guiding gutters, realize step-down for the third time and protection against erosion outlet flow inside, at valve plug 14 upsides the gimbal sealing is arranged, downside has valve plug 14 and valve seat 15 heap face seals when valve plug is closed.