A kind of multi-sealed bellows instrument valveTechnical field：
The present invention relates to a kind of instrument valve, be especially adapted for use in oil, chemical industry, power field application high pressure resistant andThe bellows instrument valve of high sealing performance.
Background technology：
With the high speed development of the national economy in China, it is suitable for oil, chemical industry, chemical fertilizer, pesticide, chemical fibre, papermaking, systemSugar, food, power station, etc. industrial departments and agricultural or even living facilities purifier pipeline control system, to pipe-line systemCarry out the special valve of switch control.It is best suited for the pipeline of the media such as steam, inflammable, explosive, conduction oil, high-purity, toxicUpper carry out dual-seal.
Least it is exactly readily to seal for the valve of the media such as steam, inflammable, explosive, conduction oil, high-purity, toxic,And high-pressure resistant corrugated pipe shut-off valve can carry out dual-seal under high-pressure situations.
Traditional bellows gauge valve, it is not high pressure resistant.It cannot be sealed well under high-pressure situations.Easily leakage, sealing surface is notIt is wear-resistant and not corrosion-resistant.Service life is short.Inconvenient for operation, maintenance cost is high.And high-pressure resistant corrugated pipe shut-off valve can beDual-seal is carried out under high-pressure situations.But the structure of bellows may make valve rod keep stable runnability can be difficult, meetingSituations such as having situations such as deflection of valve rod that can make ripple tube damage.
Invention content：
Purpose of the present invention is to, propose a kind of bellows instrument valve, valve rod by equipped with positioning device (i.e. antirotation keys) protectHold the vertical of valve plate, when valve opening and closing, valve rod can limit operation, have be not easy to leak, sealing surface is wear-resistant and it is corrosion-resistant,The advantages that service life is long.
The technical scheme is that bellows instrument valve, including valve body, flap, valve rod, valve seat, bellows, pressure ring,Valve deck, airtight and watertight padding pad, jam nut, stuffing box (stuffing box includes Packing seat, filler, packing press ring), clamp nut, handWheel；Valve body is equipped with inlet and outlet, and on an axis, the center of the enterprising outlet flow of valve body is equipped with valve seat, valve seat position to inlet and outletIn on inlet and outlet channel, valve rod is connect with the matched flap of valve seat, valve rod drives flap to open and close opening for corresponding valve on valve seatIt closes, the connection of valve rod and flap is that valve rod end rotary sleeve axis is inserted into the only hole of flap, and corrugated stainless steel tubing is sleeved on valve rod, waveLine pipe lower end is welded on the lower end of valve rod, to prevent process fluid etch valve rod；Valve rod upper end bellows upper end flange is fixed onThe circumference of pressure ring, pressure ring are fixed between valve body and valve deck, and airtight and watertight padding pad is equipped with below pressure ring and constitutes static seal；Valve rod passes throughPressure ring centre bore and upper cover center, valve stem tip are equipped with the handwheel of bonding, are set around the position of valve rod above upper cover inner corrugated pipeIt includes Packing seat, filler, packing press ring to have stuffing box, stuffing box.
Equipped with clamp nut, the longitudinal section of clamp nut is door shape, and it is matched that upper cover top is equipped with clamp nut screw threadPacking press ring is fixed on upper lid by screw thread, clamp nut.
Equipped with jam nut, the longitudinal section of jam nut is door shape, and valve body is equipped with the matched spiral shell of jam nut screw threadUpper cover is fixed on valve body by line, jam nut.
Valve seat on inlet and outlet channel is a taper hole, and flap is taper, and taper flap is inserted into taper hole.
The position that corrugated stainless steel tubing is accommodated on valve body is a tubular.
The inlet and outlet of valve body, which are equipped with, takes over, and the connection version of take over inlet and outlet is set to there is flange, between importing and exporting and taking overEquipped with sealing ring, it is equipped with union nut, the longitudinal section of union nut is door shape, and the inlet and outlet of valve body are tubulose, the outside of pipeIt is matched with the internal thread of union nut equipped with external screw thread, union nut, which will take over, to be fixed in inlet and outlet.
Position of the valve rod above bellows is equipped with the sealing of Packing seat, composite filling.
Bellows valve is best suited on the pipeline of the media such as steam, inflammable, explosive, conduction oil, high-purity, toxic.
The present invention uses the valve rod of the fully wrapped around shut-off valve of bellows, in addition the stuffing box sealing on valve rod, can prevent workSkill fluid etch valve rod；If can also avoid leaking using dual Seal Design ripple tube failure valve stem packing, bellows is welded inValve rod keeps stable runnability, avoids causing valve rod to vibrate due to valve plug vibration.Be best suited for steam, it is inflammable, explosive, leadOn the pipeline of the media such as deep fat, high-purity, toxic.
Advantageous effect：Bellows stop valve product of the present invention has the following advantages, is used inside the bellows stop valveBellows, using dual Seal Design, position of the valve rod above bellows is equipped with Packing seat, composite filling seals, if waveThe valve stem packing of line tube failure can also avoid leaking, and bellows is welded in the runnability that valve rod keeps stable, avoids shaking due to valve plugIt is dynamic that valve rod is caused to vibrate.And valve body solid forging structure, proof strength reach long service life.Using high voltage bearing waveLine pipe ensures the sealing performance under high pressure working condition.It is convenient, flexible using the inlet and outlet of welding take over connecting valve, it reachesTo long service life.Multi-sealed high voltage bearing bellows is taken, ensures the sealing performance under high pressure working condition.UsingAnti- bellows rotational structure ensures that bellows is not destroyed, ensures bellows working performance.Flap uses built-up welding not with sealing surfaceSame hard alloy, wear-resistant and corrosion resistance are strong；It is applied widely.Instrument valve arrangement of the present invention is concise, and sealing effect is good.ValveThe inlet and outlet of body are equipped with to take over has the structure quickly connected, the connection especially suitable for instrument with union nut.
Description of the drawings：
Fig. 1 is schematic structural view of the invention.
Specific implementation mode：
As shown, 1, welded type is taken over, 2, sealing ring, 3, valve body, 4, union nut, 5, flap, 6, bellows, 7, pressureRing, that is, anti-rotational group of cyclization, 8, airtight and watertight padding, 9, jam nut, 10, stuffing box, 11, Packing seat, 12, filler, 13, filler pressureRing, 14, clamp nut, 15, handwheel, 16, valve rod.
Bellows instrument valve, including valve body, flap, valve rod, valve seat, bellows, pressure ring, valve deck, airtight and watertight padding pad, spelling are tightlyNut, stuffing box (stuffing box includes Packing seat, filler, packing press ring), clamp nut, handwheel；Valve body solid forging structure is protectedIntensity is demonstrate,proved, connection is taken over using welding, it is convenient, flexible.Valve body is equipped with inlet and outlet, and welded type takes over, and 2, sealing ring, 3, valve body,4, union nut；On an axis, the center of the enterprising outlet flow of valve body is equipped with valve seat to inlet and outlet, and it is logical that valve seat is located at inlet and outletOn road, the valve seat on inlet and outlet channel is a taper hole shape, and flap is that taper, taper flap and taper hole coordinate, valve rod and flapIt is fixed, valve rod is connect with the matched flap of valve seat, valve rod drives flap to open and close the keying for corresponding to valve, stainless steel wave on valve seatLine pipe sleeve is on valve rod, and the position of corrugated stainless steel tubing is a tubular on valve body, and corrugated stainless steel tubing is using triple high voltage bearingBellows.Bellows lower end is welded on the lower end of valve rod, to prevent process fluid etch valve rod；It turns over valve rod upper end bellows upper endWhile being fixed on the circumference of pressure ring, pressure ring is fixed between valve body and valve deck, and airtight and watertight padding pad is equipped with below pressure ring and constitutes static seal；Valve rod passes through pressure ring centre bore and upper cover center, valve stem tip to be equipped with the handwheel of bonding, and the position above upper cover inner corrugated pipe is setIt includes Packing seat, filler, packing press ring to have stuffing box, stuffing box, constitutes the design of dual airtight and watertight padding case, sealed reliable.HandWhen wheel belt ovable valve stem up and down motion opening/shutting valve, in the telescopic extensions of corrugated stainless steel tubing, the sealing of corrugated stainless steel tubing is completeIt is not affected entirely.Pressure ring, that is, anti-bellows rotation combination ring.The connection of valve rod and flap is that valve rod end rotary sleeve axis is inserted into valveIn the only hole of valve, valve rod end rotary sleeve axis is an enlarged footing, and only hole is the neck bore for accommodating enlarged footing.
Equipped with clamp nut, the longitudinal section of clamp nut is door shape, and it is matched that upper cover top is equipped with clamp nut screw threadScrew thread, clamp nut are used to packing press ring being fixed on upper lid.Flap uses built-up welding different hardness alloy with sealing surface.
Equipped with jam nut, the longitudinal section of jam nut is door shape, and valve body is equipped with the matched spiral shell of jam nut screw threadLine, for upper cover to be fixed on valve body.
The inlet and outlet of valve body, which are equipped with, takes over, and the connection version of take over inlet and outlet is set to there is flange, imports and exports and take over (methodIt is blue) between be equipped with sealing ring, be equipped with union nut, the longitudinal section of union nut is door shape, and the inlet and outlet of valve body are tubulose, pipeOutside matched with the internal thread of union nut equipped with external screw thread, union nut will take over (flange) and be fixed in inlet and outlet.
As shown, rotation hand wheel band ovable valve stem, promotes or declines valve rod and flap, valve stream thus may be implementedThe on or off for measuring channel, to carry out the control to pipeline.
The foregoing is merely a kind of embodiments of the present invention, are not intended to limit the invention, all essences in the present inventionAll any modification, equivalent and improvement etc. made by within refreshing and principle, to be included within protection scope of the present invention.