CN203098878U - Pneumatic high-pressure regulating valve - Google Patents
Pneumatic high-pressure regulating valve Download PDFInfo
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- CN203098878U CN203098878U CN 201220742658 CN201220742658U CN203098878U CN 203098878 U CN203098878 U CN 203098878U CN 201220742658 CN201220742658 CN 201220742658 CN 201220742658 U CN201220742658 U CN 201220742658U CN 203098878 U CN203098878 U CN 203098878U
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Abstract
The utility model discloses a pneumatic high-pressure regulating valve. The pneumatic high-pressure regulating valve comprises an actuating mechanism and a valve portion under the actuating mechanism. The valve portion comprises a valve body, an inlet flow passage and an outlet flow passage are formed inside the valve body, and an included angle between the inlet flow passage and the outlet flow passage is 120 degrees. Due to the adoption of various special structural designs, applicable differential pressure of the valve is very high, and cavitation is completely eliminated. The pneumatic high-pressure regulating valve is sensitive in action, high in response speed, and capable of being opened and closed freely to achieve tight closing under very high fluid differential pressure. Specially designed side flanges of the valve body and valve cages can guide fluid, relieve fluid pressure, protect a valve core against damage from fluid erosion, flashing and cavitation, and reduce noise. The pneumatic high-pressure regulating valve is easy to maintain, fast, and low in cost, and the service life is significantly prolonged. The pneumatic high-pressure regulating valve is especially suitable for being used in automatic control of high-temperature, high-pressure and high-differential-pressure mediums, and is safe and reliable to use. Compared with other valves, the pneumatic high-pressure regulating valve has incomparable advantages when being used in fields with easily crystallized mediums of high-pressure urea and the like.
Description
Technical field
The utility model relates to a kind of pneumatic high-voltage modulating valve.
Background technique
The pneumatic high-voltage modulating valve is mainly used in the automatic control system of high pressure, High Pressure Difference operating mode of industries such as oil, chemical industry, chemical fertilizer, generating, and process conditions are more abominable, to the reliability of modulating valve, security requirement than higher.
Medium-sized pneumatic high-voltage modulating valve is a kind of dihedral modulating valve of 90 degree right angles, many springs of adapted pneumatic diaphragn actuating mechanism, because the compressive strength of elastomer diaphragm is low, bleed pressure is low, and ouput force is smaller.Moreover because valve flowing channel is 90 degree right angle types, the impact force of high-pressure liquid is very big, the valve cage of ordinary construction is housed in the valve body, the huge thrust that kinetic energy when high-pressure liquid flows produces directly laterally acts on the spool of valve, make spool be subjected to the thrust of side and to other direction skew, thereby it is monolateral to make spool be close to valve cage, regulates rate-of flow because modulating valve spool when work will move up and down, spool and valve cage can produce very big frictional force, and this just is the eccentric wear phenomenon.There is design deficiency in the valve cage of ordinary construction, make the spool uneven wear serious, will make the spool external diameter become elliptical shape in short period, it increases with the matching gap of the interior warp of valve cage, and under the impact of high-pressure liquid, spool can produce strong mechanical vibration and noise, cause environmental pollution, the adjusting function variation, long-time vibration can be given birth to burst accident to the valve rod stopping pregnancy of shaking, and has had a strong impact on user's production safety.
If the high pressure urea workshop section of plain edition pneumatic high-voltage modulating valve use at fertilizer industry, the medium that many easy crystallizations such as urea are arranged, when normal temperature, be deposited in medium in the modulating valve stuffing box and will crystallize into particle adhesion on valve rod and damage the integrity of packing seal circle and the polished surface of valve rod, medium is leaked from stuffing box, thereby must often change the packing seal circle, maintenance load is increased, not only influenced and produced but also befouling environment, also increased user's cost of production.
The pneumatic high-voltage modulating valve mainly is used in harsh operating modes such as high pressure, High Pressure Difference, because pressure medium height, flow velocity are fast, will produce cavitation phenomenon, if the material of spool, valve seat is without special superpressed processing, can produce serious erosion damage to spool, valve seat, make valve can't continue to use, shorten the working life of modulating valve greatly, make the user have to prepare a large amount of spare parts and change.
The model utility content
The trim eccentric wear that technical problem to be solved in the utility model is to produce at the deficiency in the plain edition pneumatic high-voltage modulating valve design, wear and tear, wash away, phenomenon such as scuffing and the vibration, noise, the leakage that cause, working life is short and pneumatic actuator stem force is little, use defectives such as pressure reduction is low to improve, and designs a kind of pneumatic high-voltage modulating valve of special construction.
Technical problem to be solved in the utility model can be achieved through the following technical solutions:
A kind of pneumatic high-voltage modulating valve comprises a kind of pneumatic actuator and the valve portion that is arranged on the pneumatic actuator below, and described valve portion comprises:
Valve body has an entrance channel and an outlet flow and a valve rod hole in the described valve body, described outlet flow and the coaxial setting of described valve rod hole, and described entrance channel and outlet flow, valve rod hole are 120 degree angles and connect mutually;
One first screwed flange that is connected with the valve body sidepiece by connecting bolt;
One second screwed flange that is connected by adpting flange and valve body bottom;
One valve body side flange, this valve body side flange has a cylinder section that is threaded with described first screwed flange, have hole, a medium inlet in described valve body side flange, the outlet end scioptics pad of the cylindrical shell end of described valve body side flange docks with the inlet of described entrance channel;
One is installed in the valve seat in the described outlet flow, has valve opening in the described valve seat;
One is screwed in the venturi short tube on described second screwed flange, and the entry end of described venturi short tube docks with described valve seat;
Be installed in the valve cage on valve seat the inner;
The stuffing box parts that are seated in the described valve rod hole and compress by hold-down grid;
Pass the valve rod of described stuffing box parts, the lower end of described valve rod is provided with the spool that passes described valve cage and described valve opening is opened and closed, and the upper end of this valve rod is connected with described actuator, it is characterized in that,
Described entrance channel becomes 120 ° with angle between the outlet flow.
In a preferred embodiment of the present utility model, described valve cage and valve seat are integral structure.
In a preferred embodiment of the present utility model, on the cage wall of described valve cage, be provided with some stair-stepping decompression holes.
In a preferred embodiment of the present utility model, having central angle corresponding to the cage wall at the described entrance channel back side is 30 ° imperforate section cylinder.
In a preferred embodiment of the present utility model, the inlet in the hole, medium inlet of described valve body side flange is provided with a restricting orifice.
In a preferred embodiment of the present utility model, described valve opening is up-small and down-big horn-like.
In a preferred embodiment of the present utility model, have the two-stage venturi expanded bore and the straight hole section that is connected two-stage venturi expanded bore of mutual perforation in the described venturi short tube.
In a preferred embodiment of the present utility model, described spool and valve rod adopt stainless steel material one-body molded, and at the surperficial supersonic spray coating widia of valve rod, spool and valve seat, hardness reaches HRC66-70.
In a preferred embodiment of the present utility model, described valve body adopts stainless steel integrated forging to form.
In a preferred embodiment of the present utility model, near being provided with bottoming hole in the valve body around the stuffing box parts upper position, described bottoming hole is communicated with the heat medium injection device into and out of the hole by the heat medium that is arranged in the valve body in valve body.
In a preferred embodiment of the present utility model, described stuffing box parts comprise the interior following guide pipe of valve rod hole of from bottom to top packing into successively, packing seal circle, disrance sleeve, packing seal circle, go up guide pipe.
In a preferred embodiment of the present utility model, described actuator is a spring cylinder formula actuator.
In a preferred embodiment of the present utility model, described spring cylinder formula actuator comprises:
One lower end is installed in the support on the described valve body top, and the intermediate portion of described support is two support arms, and the upper end of two support arms is an air cylinder base flange, offers an inlet hole and a center push rod hole on described air cylinder base flange;
One is installed in cylinder block on the described air cylinder base flange by cylinder snap ring and Sealing, position at the close top of described cylinder block offers inlet hole on, the center at top offers a spring pretension bolt hole, and the space that described cylinder block and described air cylinder base flange surround constitutes the piston cavity of cylinder;
The push rod that one lower end is connected with described valve rod upper end, the upper end of described push rod is passed the center push rod hole on the described air cylinder base flange and is entered in the described piston cavity;
Be fixed on described push rod upper end and be positioned at the piston of described piston cavity;
Be spun on the spring pretension bolt in the described spring pretension bolt hole, the lower end of described spring pretension bolt extends into described piston cavity and is connected with a spring shield in the lower end of this spring pretension bolt, is provided with spring between described spring shield and described piston.
In a preferred embodiment of the present utility model, described spring cylinder formula actuator comprises:
One lower end is installed in the support on the described valve body top, and the intermediate portion of described support is two support arms, and the upper end of two support arms is an air cylinder base flange, offers an inlet hole and a center push rod hole on described air cylinder base flange;
One is installed in cylinder block on the described air cylinder base flange by cylinder snap ring and Sealing, position at the close top of described cylinder block offers inlet hole on, the center at top offers a spring pretension bolt hole, and the space that described cylinder block and described air cylinder base flange surround constitutes the piston cavity of cylinder;
The push rod that one lower end is connected with described valve rod upper end, the upper end of described push rod is passed the center push rod hole on the described air cylinder base flange and is entered in the described piston cavity;
Be fixed on described push rod upper end and be positioned at the piston of described piston cavity;
Be spun on the spring pretension bolt in the described spring pretension bolt hole, the lower end of described spring pretension bolt extends into described piston cavity, is provided with spring between described piston and described air cylinder base flange.
In a preferred embodiment of the present utility model, on the one section push rod that exposes below the air cylinder base flange, be with rubber corrugated pipe.
In a preferred embodiment of the present utility model, the joint of described push rod and valve rod is tight by push rod folder clamping, and a side of pressing from both sides at described push rod is fixed with the one stroke pointer, and the opposite side that presss from both sides at push rod is provided with a slide block; In support arm installed inside the stroke scale is arranged in addition near this side of stroke pointer, and one slide rail is arranged in support arm installed inside near this side of slide block, described slide block is followed described push rod and is moved on described slide rail, and described stroke pointer shows the displacement distance of described push rod in conjunction with the stroke scale.
Owing to adopted technological scheme as above, the utlity model has following advantage:
1. reasonable flow channel design:
For modulating valve, high pressure, High Pressure Difference fluid are easy to generate cavitation erosion and wash away, and can produce serious destruction to spool, the valve seat of valve.Select suitable stream, reduce the speed of fluid, reduce the unordered of fluid and flow, thereby reduce the key that eroding velocity is the modulating valve design.Adopt the angular structure design between valve body side flange of this modulating valve and the venturi short tube, whole valve body and valve gap are the special stainless steel structure of solid forging, avoid flange to connect and produce leakage point.Runner in the valve body is airflow design, the smooth no dead band of runner.This modulating valve changes 90 degree angle flow passage structures of common high-pressure regulation valve body into the runner of 120 degree angles, can make media flow steady like this, the high pressure thrust that high-pressure liquid is produced is decomposed into two component: end thrust and radially move back power, thus make the radial thrust minimizing 30% that acts on the spool.
The utility model is provided with restricting orifice in the valve body side flange, valve cage is provided with the step type decompression hole of two-stage step-down, adopt two-stage venturi expanded bore in the venturi short tube at valve outlet place, fluid enters the valve body side flange and slows down through flow velocity behind the restricting orifice, flow velocity further reduces after entering valve cage, after entering first order venturi hole section, flow velocity reduces again, enter second level venturi expanded bore through one section straight hole Duan Houzai, further reduce rate of flow of fluid, by above step-down, the reduction of speed measure has reduced the flow velocity of downstream fluid, thereby reduced eroding velocity, dropped to minimum cavitating and washing away the influence that causes.
2. the valve cage of particular design:
Modulating valve of the present utility model is an integral type with valve cage and seat design, so just making valve cage and valve seat is same center, adopt the lens type Placement to connect between valve body and the valve seat, do not adopt any pad, valve body, spool, valve seat, four parts of valve cage are certainly to the center.No step type decompression hole on the cage wall in the 30 degree scopes of the fluid inlet back side in addition, there is not fluid to flow out, high-pressure liquid can be reposefully through densely covered step type decompression hole in the 330 degree circumference like this, through flowing into after the two-stage step-down in the valve cage, fluid flows into and to run foul of each other in the valve cage and can eliminate part energy, makes that spool is stressed evenly can not to produce the eccentric wear phenomenon.Moreover the variation of spool top relative position in valve cage can realize the variation of orifice size, guarantees that valve has only flow under the degree under any aperture.In a word, valve cage has played the effect of step-down and minimizing medium turbulent flow by above-mentioned improvement, and the uneven thrust that acts on the spool is reduced more than 50%, has eliminated the eccentric wear phenomenon that spool causes owing to medium thrust, the working life of having improved valve.
3. the anti-trim that cavitates:
In order to resist cavitation erosion and to wash away destruction to spool, valve seat, as a rule the hard more abrasion resistance of material can be good more, the spool of this modulating valve, valve seat, valve cage and valve rod have adopted the special process manufacturing, both adopted the supersonic spray coating widia in special surface of stainless steel, its hardness can reach HRC66-70, the ability that has greatly improved the anti-cavitation erosion of trim and washed away, improve working life greatly, is specially adapted to the adjusting of high temperature, high pressure, High Pressure Difference medium.
4. improve the temperature of stuffing box:
In order to improve the working life of the valve (being commonly called as the urea valve) that is used for easy crystal mediums such as fertilizer industry-high pressure urea, these media easily crystallize into particle adhesion under the normal temperature state can damage the integrity of packing seal circle and the burnishing surface of valve rod in stem surface, causes that the valve rod place produces leakage; The utility model design of locating on every side of stuffing box parts upper position in valve body has bottoming hole, feed low pressure hot water or steam, be used to improve the temperature of stuffing box parts, can avoid the packing leaking that produces by the medium crystallization, guarantee that valve rod and packing seal circle have longer no-failure life.
5. integral type spool, stem structure:
Because it is very big that the high-pressure liquid of septum valve acts on the unbalanced force of spool, valve rod, the valve rod of common septum valve is very thin, and valve rod and spool are with being threaded, the phenomenon that valve rod bending, fracture, spool come off happens occasionally, cause urgent stopping production accident, cause very big loss to the user; The utility model is designed to integral structure to spool and valve rod, valve rod than the thick 3-4 of traditional type valve rod doubly, stem surface is hardened and polishing treatment, can bear High Pressure Difference and eliminate that spool comes off, the possibility of valve rod bending break, wear-resistant, long service life.
6. adapted spring cylinder formula actuator:
Traditional, pneumatic septum valve adapted be many springs air bladder formula actuator, ouput force is little, poor reliability, working life is short, and burst accident easily takes place.And this modulating valve adapted is spring cylinder formula actuator, has very big thrust and very high rigidity intensity, the Location accuracy that is active in one's movements height, and speed of response is fast, and the upper and lower of piston is accepted pure pressurized air simultaneously, never corrosion.Safe Returnning spring is housed in the cylinder, and spring can make valve close automatically or open during air failure, has guaranteed the safety of system; Compare with pneumatic diaphragn actuating mechanism have sturdy and durable, thrust is powerful and be easy to characteristics such as maintenance, the positive reaction of actuator can be changed at the scene easily, is specially adapted to the operating mode of high pressure, High Pressure Difference.
Description of drawings
Fig. 1 is the structural representation of the utility model gas force open type pneumatic high-voltage modulating valve.
Fig. 2 is the A place enlarged diagram of Fig. 1.
Fig. 3 is the structural representation of the utility model air to close pneumatic high-voltage modulating valve.
Embodiment:
Come the clearer the utility model that intactly illustrates below in conjunction with accompanying drawing.
Referring to Fig. 1 and Fig. 2, a kind of gas force open type pneumatic high-voltage modulating valve that provides among the figure comprises a kind of gas force open type spring cylinder formula actuator and is arranged on the valve portion of gas force open type spring cylinder formula actuator below.
Valve portion comprises a valve body 10, adopts stainless steel integrated forging to form between valve gap on this valve body 10 and the valve body, avoids flange to connect and produces leakage point.Offer entrance channel 10a, outlet flow 10b and the valve rod hole 10c of mutual perforation in this valve body 10, entrance channel 10a, outlet flow 10b are airflow design, the smooth no dead band of runner.Outlet flow 10b and the coaxial setting of valve rod hole 10c, angle becomes 120 ° between the central axis of the central axis of entrance channel 10a and outlet flow 10b, can make media flow steady like this, the high pressure thrust that high-pressure liquid is produced is decomposed into two component: end thrust and radially move back power, thus make the radial thrust minimizing 30% that acts on the spool.Inlet side at outlet flow 10b is provided with a valve seat orifice.
Sidepiece at valve body 10 is equipped with a screwed flange 3 by connecting bolt 2 and nut, has a tapped hole in the screwed flange 3, bottom at valve body 10 is equipped with a screwed flange 14 by connecting bolt 13 and nut, has a tapped hole in the screwed flange 15.
The valve body side flange 1 of valve in partly has a cylinder section 1a and a flange part 1b, is provided with one section outside thread at the front end of cylinder section 1a, and medium inlet hole 1c is set in valve body side flange 1.During assembling, in the tapped hole that screws into screwed flange 3 with the front end of cylinder section 1a, German-style metal lensring 4 is pressed in the inlet side of entrance channel 10a, the outlet side of hole, the medium inlet 1c in the valve body side flange 1 is docked with the inlet side of entrance channel 10a.In order to reduce flow rate of fluid, the inlet side of hole, the medium inlet 1c in valve body side flange 1 is provided with water conservancy diversion orifice plate 1d.Flange part 1b is connected with piping flange.
Venturi short tube 15 has a cylinder section 15a and a flange part 15b, front end at cylinder section 15a is provided with one section outside thread, and two-stage venturi expanded bore 15c, the 15d and the straight hole section 15e that is connected two-stage venturi expanded bore 15c, 15d of mutual perforation is set in valve body side flange 1.During assembling, in the tapped hole that screws into screwed flange 14 with the front end of cylinder section 15a, valve seat 21 is held out against in valve seat orifice, and to make between valve seat 21 and the valve body 10 be that the lens type Placement is connected, do not adopt any pad, valve body 10, spool, valve seat 30,31 4 parts of valve cage are certainly to the center.After connecting by the way in addition, first order venturi expanded bore 15c and valve seat 30 interior valve opening 30a dock.After the fluid of Liu Chuing enters first order venturi hole 15c like this, flow velocity reduces again, through entering second level venturi expanded bore 15d behind one section straight hole 15e again, further reduce rate of flow of fluid, by above step-down, reduction of speed measure, reduced the flow velocity of downstream fluid, thereby reduced eroding velocity, dropped to minimum cavitating and washing away the influence that causes.
In order to improve the working life of the valve (being commonly called as the urea valve) that is used for easy crystal mediums such as fertilizer industry-high pressure urea, these media easily crystallize into particle adhesion under the normal temperature state can damage the integrity of packing seal circle and the burnishing surface of valve rod in stem surface, is easy to generate leakage; This valve member is at stuffing box parts upper position, just design has bottoming hole 10d in the valve body around the position of packing seal circle 6b 10, this bottoming hole 10d is communicated with low pressure hot water or steam injection device into and out of hole 10e, 10f by the heat medium that is arranged in the valve body 10, by feeding low pressure hot water or steam, be used to improve the temperature that the stuffing box parts are packing seal circle 6b, can avoid the medium crystallization to cause valve rod place packing leaking, guarantee that valve rod 32 and packing seal circle 6b and 6a have longer no-failure life.
Gas force open type spring cylinder formula actuator comprises a support 28, this support 28 has two support arm 28a, 28b, the lower end of two support arm 28a, 28b is by being bolted on the valve body 10, be connected with an air cylinder base flange 28c in the upper end of two support arm 28a, 28b, on air cylinder base flange 28c, offer an inlet hole 28ca and a center push rod hole 28cb.
Push rod 26 passes the interior pushrod bushing 27 of center push rod hole 28cb on the air cylinder base flange 28c, and its lower end is connected by adopting engage thread with valve rod 32 upper ends, and tightens fixing by push rod folder 29 folders that are installed in push rod 26 lower ends.The upper end of push rod 26 enters in the piston cavity 33.Be provided with a piston 23 in piston cavity 33, piston 23 is fixed on the upper end of push rod 26 by piston fixed cover 34, lock piston jack panel 35.Piston 23 outer radius are provided with piston packing 24 and cooperate with the internal diameter of cylinder block 21.
Be rotary with a spring pretension bolt 20 in spring pretension bolt hole 21b, the lower end of spring pretension bolt 20 extends into piston cavity 33 and is connected with a spring shield 22 in the lower end of this spring pretension bolt 20, is provided with spring 25 between spring shield 22 and piston 23.
In order to show the stroke of push rod 26, be fixed with one stroke pointer 36 in a side of push rod folder 29, opposite side is provided with a slide block 37; In support arm 28b installed inside stroke scale 38 is arranged in addition near stroke pointer 36 these sides, and one slide rail 39 is arranged in support arm 28a installed inside near slide block 37 these sides, slide block 37 is followed push rod 26 and is moved on slide rail 37, and stroke pointer 36 shows the displacement distance of push rod 32 in conjunction with stroke scale 38.
On the one section push rod 26 that exposes below the air cylinder base flange 28c, be with metal bellows 40.
Just formed gas force open type pneumatic high-voltage modulating valve after gas force open type spring cylinder formula actuator and valve partly be connected by the support folder; This gas force open type pneumatic high-voltage modulating valve is installed on the process pipe, bleed pressure is ventilated to piston cavity 33 bottoms from the following inlet hole 28ca on the air cylinder base flange 28c on support 28 tops, promoting piston 23 moves upward, piston 23 is in the process of moving upward, driving push rod 26 and valve rod 32 and spool 11 moves upward, pressure spring 25 makes lift off a seat 30 valve opening 30a and make valve opening of spool 11; When source of the gas broke down, the rebounding force of spring 25 promoted piston 23 and moves downward, and piston 23 moves downward in the process, promoting push rod 26 moves down, push rod 26 promotes spool 11 by valve rod 32 and moves downward, and the valve opening 30a on the valve seat 30 is closed, and is about to valve closing.
Under normal circumstances, the inlet hole 21a air inlet on cylinder 21 tops, the promotion piston 23 of making a concerted effort of thrust that produces and spring 25 reaction forces moves downward, piston 23 moves downward in the process, promoting push rod 26 moves down, push rod 26 promotes spool 11 by valve rod 32 and moves downward, and the valve opening 30a on the valve seat 30 is closed, and is about to valve closing.
Referring to Fig. 3, this embodiment's who provides among the figure pneumatic high-voltage modulating valve is an air to close pneumatic high-voltage modulating valve, comprises a kind of air to close spring cylinder formula actuator and is arranged on the valve portion of gas force open type spring cylinder formula actuator below.Wherein valve portion is identical with embodiment 1 valve portion.
And air to close spring cylinder formula actuator is different with embodiment 1 gas force open type spring cylinder formula actuator structure, this air to close spring cylinder formula actuator comprises a support 28, this support 28 has two support arm 28a, 28b, the lower end of two support arm 28a, 28b is by being bolted on the valve body 10, be connected with an air cylinder base flange 28c in the upper end of two support arm 28a, 28b, on air cylinder base flange 28c, offer an inlet hole 28ca and a center push rod hole 28cb.
Push rod 26 passes the interior pushrod bushing 27 of center push rod hole 28cb on the air cylinder base flange 28c, and its lower end is connected by adopting engage thread with valve rod 32 upper ends, and tightens fixing by push rod folder 29 folders that are installed in push rod 26 lower ends.The upper end of push rod 26 enters in the piston cavity 33.Be provided with a piston 23 in piston cavity 33, piston 23 is fixed on the upper end of push rod 26 by piston fixed cover 34, lock piston jack panel 35 and spring shield 22.Piston 23 outer radius are provided with piston packing 24 and cooperate with the internal diameter of cylinder block 21.
Be rotary with a spring pretension bolt 20 in spring pretension bolt hole 21b, the lower end of spring pretension bolt 20 extends into piston cavity 33 and contacts with lock piston jack panel 35, is provided with spring 25 between piston 23 and air cylinder base flange 28c.
In order to show the stroke of push rod 26, be fixed with one stroke pointer 36 in a side of push rod folder 29, opposite side is provided with a slide block 37; In support arm 28b installed inside stroke scale 38 is arranged in addition near stroke pointer 36 these sides, and one slide rail 39 is arranged in support arm 28a installed inside near slide block 37 these sides, slide block 37 is followed push rod 26 and is moved on slide rail 37, and stroke pointer 36 shows the displacement distance of push rod 32 in conjunction with stroke scale 38.
On the one section push rod 26 that exposes below the air cylinder base flange 28c, be with metal bellows 40.
After partly assembling, gas force open type spring cylinder formula actuator and valve just form air to close pneumatic high-voltage modulating valve, bleed pressure is from the top ventilation of last inlet hole 21a in piston cavity 33 on the top of cylinder 21, promoting piston 23 moves downward, piston 23 promotes push rod 26 and moves downward in moving downward process, spring 25 pressurizeds and compressing, and push rod 26 is in moving downward process, promote spool 8 by valve rod 32 and move downward, the valve opening 30a on the valve seat 30 is closed, even valve closing.When source of the gas breaks down, the last inlet hole 21a on cylinder 21 tops discharges source of the gas, spring 25 obtains discharging, its rebounding force promotes piston 23 and moves upward, piston 23 promotes push rod 26 and also moves upward, in the process that moves upward of push rod 26 in the process of moving upward, drive spools 8 by valve rod 32 and move upward, make spool 11 lift off a seat 30 valve opening 30a and make valve wide open.Under normal circumstances, bleed pressure is ventilated to piston cavity 33 bottoms from the following inlet hole 28ca on the air cylinder base flange 28c on support 28 tops, the making a concerted effort of thrust that produces and spring 25 reaction forces promoting piston 23 moves upward, piston 23 is in the process of moving upward, driving push rod 26 and valve rod 32 and spool 11 moves upward, pressure spring 25 makes lift off a seat 30 valve opening 30a and make valve wide open of spool 11.
The utility model pneumatic high-voltage modulating valve is owing to adopt above-mentioned multiple special construction design, and it is very high to make valve be suitable for pressure reduction, has thoroughly eliminated cavitation phenomenon; Be active in one's movements, speed of response is fast, in the face of very high fluid pressure difference, also can switch freely and reach tight closing; But particular design valve body side flange and valve cage be direct fluid again, buffer fluid pressure, and the destruction that the protection spool is not subjected to fluid erosion, flash distillation and cavitation can be reduced noise again simultaneously; Safeguard simple and easyly, quick and low-cost, significantly improve working life, is specially adapted to the automatic control of high temperature, high pressure, High Pressure Difference medium, safe and reliable.Occasion in particular for easy crystal medium more has the unrivaled advantage of other valves.
Claims (16)
1. a pneumatic high-voltage modulating valve comprises a kind of actuator and the valve portion that is arranged on the actuator below, and described valve portion comprises:
Valve body has an entrance channel and an outlet flow and a valve rod hole in the described valve body, described outlet flow and the coaxial setting of described valve rod hole, and described entrance channel and outlet flow, valve rod hole connect mutually;
One first screwed flange that is connected with the valve body sidepiece by connecting bolt;
One second screwed flange that is connected by adpting flange and valve body bottom;
One valve body side flange, this valve body side flange has a cylinder section that is threaded with described first screwed flange, have hole, a medium inlet in described valve body side flange, the outlet end scioptics pad of the cylindrical shell end of described valve body side flange docks with the inlet of described entrance channel;
One is installed in the valve seat in the described outlet flow, has valve opening in the described valve seat;
One is screwed in the venturi short tube on described second screwed flange, and the entry end of described venturi short tube docks with described valve seat;
Be installed in the valve cage on valve seat the inner;
The stuffing box parts that are seated in the described valve rod hole and compress by hold-down grid;
Pass the valve rod of described stuffing box parts, the lower end of described valve rod is provided with the spool that passes described valve cage and described valve opening is opened and closed, and the upper end of this valve rod is connected with described actuator, it is characterized in that,
Described entrance channel becomes 120 ° with angle between the outlet flow.
2. pneumatic high-voltage modulating valve as claimed in claim 1 is characterized in that, described valve cage and valve seat are integral structure.
3. pneumatic high-voltage modulating valve as claimed in claim 1 is characterized in that, is provided with some stair-stepping decompression holes on the cage wall of described valve cage.
4. pneumatic high-voltage modulating valve as claimed in claim 3 is characterized in that, having central angle corresponding to the cage wall at the described entrance channel back side is 30 ° imperforate section cylinder.
5. pneumatic high-voltage modulating valve as claimed in claim 1 is characterized in that, the inlet in the hole, medium inlet of described valve body side flange is provided with a restricting orifice.
6. pneumatic high-voltage modulating valve as claimed in claim 1 is characterized in that, described valve opening is up-small and down-big horn-like.
7. pneumatic high-voltage modulating valve as claimed in claim 1 is characterized in that, has the two-stage venturi expanded bore and the straight hole section that is connected two-stage venturi expanded bore of mutual perforation in the described venturi short tube.
8. pneumatic high-voltage modulating valve as claimed in claim 1 is characterized in that, described spool and valve rod adopt stainless steel material one-body molded, and at the surperficial supersonic spray coating widia of valve rod, spool and valve seat, hardness reaches HRC66-70.
9. pneumatic high-voltage modulating valve as claimed in claim 1 is characterized in that, described valve body adopts stainless steel integrated forging to form.
10. pneumatic high-voltage modulating valve as claimed in claim 1, it is characterized in that, near being provided with bottoming hole in the valve body around the stuffing box parts upper position, described bottoming hole is communicated with the heat medium injection device into and out of the hole by the heat medium that is arranged in the valve body in valve body.
11. pneumatic high-voltage modulating valve as claimed in claim 1 is characterized in that, described stuffing box parts comprise the interior following guide pipe of valve rod hole of from bottom to top packing into successively, packing seal circle, disrance sleeve, packing seal circle, go up guide pipe.
12., it is characterized in that described actuator is a spring cylinder formula actuator as the described pneumatic high-voltage modulating valve of each claim of claim 1 to 11.
13. pneumatic high-voltage modulating valve as claimed in claim 12 is characterized in that, described spring cylinder formula actuator comprises:
One lower end is installed in the support on the described valve body top, and the intermediate portion of described support is two support arms, and the upper end of two support arms is an air cylinder base flange, offers an inlet hole and a center push rod hole on described air cylinder base flange;
One is installed in cylinder block on the described air cylinder base flange by cylinder snap ring and Sealing, position at the close top of described cylinder block offers inlet hole on, the center at top offers a spring pretension bolt hole, and the space that described cylinder block and described air cylinder base flange surround constitutes the piston cavity of cylinder;
The push rod that one lower end is connected with described valve rod upper end, the upper end of described push rod is passed the center push rod hole on the described air cylinder base flange and is entered in the described piston cavity;
Be fixed on described push rod upper end and be positioned at the piston of described piston cavity;
Be spun on the spring pretension bolt in the described spring pretension bolt hole, the lower end of described spring pretension bolt extends into described piston cavity and is connected with a spring shield in the lower end of this spring pretension bolt, is provided with spring between described spring shield and described piston.
14. pneumatic high-voltage modulating valve as claimed in claim 12 is characterized in that, described spring cylinder formula actuator comprises:
One lower end is installed in the support on the described valve body top, and the intermediate portion of described support is two support arms, and the upper end of two support arms is an air cylinder base flange, offers an inlet hole and a center push rod hole on described air cylinder base flange;
One is installed in cylinder block on the described air cylinder base flange by cylinder snap ring and Sealing, position at the close top of described cylinder block offers inlet hole on, the center at top offers a spring pretension bolt hole, and the space that described cylinder block and described air cylinder base flange surround constitutes the piston cavity of cylinder;
The push rod that one lower end is connected with described valve rod upper end, the upper end of described push rod is passed the center push rod hole on the described air cylinder base flange and is entered in the described piston cavity;
Be fixed on described push rod upper end and be positioned at the piston of described piston cavity;
Be spun on the spring pretension bolt in the described spring pretension bolt hole, the lower end of described spring pretension bolt extends into described piston cavity, is provided with spring between described piston and described air cylinder base flange.
15. as claim 13 or 14 described pneumatic high-voltage modulating valve, it is characterized in that, on the one section push rod that exposes below the air cylinder base flange, be with rubber corrugated pipe.
16., it is characterized in that the joint of described push rod and valve rod is tight by push rod folder clamping as claim 13 or 14 described pneumatic high-voltage modulating valve, a side of pressing from both sides at described push rod is fixed with the one stroke pointer, the opposite side that presss from both sides at push rod is provided with a slide block; In support arm installed inside the stroke scale is arranged in addition near this side of stroke pointer, and one slide rail is arranged in support arm installed inside near this side of slide block, described slide block is followed described push rod and is moved on described slide rail, and described stroke pointer shows the displacement distance of described push rod in conjunction with the stroke scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742658 CN203098878U (en) | 2012-12-28 | 2012-12-28 | Pneumatic high-pressure regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742658 CN203098878U (en) | 2012-12-28 | 2012-12-28 | Pneumatic high-pressure regulating valve |
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| Publication Number | Publication Date |
|---|---|
| CN203098878U true CN203098878U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220742658 Expired - Fee Related CN203098878U (en) | 2012-12-28 | 2012-12-28 | Pneumatic high-pressure regulating valve |
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| CN (1) | CN203098878U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016754A (en) * | 2012-12-28 | 2013-04-03 | 奥士奥控制阀门(上海)有限公司 | Pneumatic high pressure regulating valve |
| CN103883785A (en) * | 2013-11-29 | 2014-06-25 | 成都欧浦特控制阀门有限公司 | Air cylinder type actuator |
| CN104101388A (en) * | 2014-07-28 | 2014-10-15 | 武汉理工大学 | Gap-adjustable orifice flow characteristic experimental facility |
| CN105177565A (en) * | 2015-09-10 | 2015-12-23 | 西派集团有限公司 | Novel technological design of partial surface treatment of triple-eccentricity pure metal sealing butterfly valve internal part revolute pair |
| CN106195366A (en) * | 2016-07-20 | 2016-12-07 | 上海宇航***工程研究所 | A kind of pneumatic fill valve |
| CN112682546A (en) * | 2020-12-07 | 2021-04-20 | 河南航天液压气动技术有限公司 | Pressure control valve |
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2012
- 2012-12-28 CN CN 201220742658 patent/CN203098878U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016754A (en) * | 2012-12-28 | 2013-04-03 | 奥士奥控制阀门(上海)有限公司 | Pneumatic high pressure regulating valve |
| CN103016754B (en) * | 2012-12-28 | 2015-03-11 | 奥士奥控制阀门(上海)有限公司 | Pneumatic high pressure regulating valve |
| CN103883785A (en) * | 2013-11-29 | 2014-06-25 | 成都欧浦特控制阀门有限公司 | Air cylinder type actuator |
| CN104101388A (en) * | 2014-07-28 | 2014-10-15 | 武汉理工大学 | Gap-adjustable orifice flow characteristic experimental facility |
| CN104101388B (en) * | 2014-07-28 | 2017-03-08 | 武汉理工大学 | A kind of throttle orifice Flow characteristic experiment device of adjustable clearance |
| CN105177565A (en) * | 2015-09-10 | 2015-12-23 | 西派集团有限公司 | Novel technological design of partial surface treatment of triple-eccentricity pure metal sealing butterfly valve internal part revolute pair |
| CN106195366A (en) * | 2016-07-20 | 2016-12-07 | 上海宇航***工程研究所 | A kind of pneumatic fill valve |
| CN112682546A (en) * | 2020-12-07 | 2021-04-20 | 河南航天液压气动技术有限公司 | Pressure control valve |
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