CN208885983U - A kind of high-pressure resistant corrugated pipe shut-off valve - Google Patents

Abstract

A kind of high-pressure resistant corrugated pipe shut-off valve, including valve body, flap, valve rod, valve seat, bellows, antirotation keys, valve deck, Packing seat, composite filling；Valve body is equipped with inlet and outlet, inlet and outlet are on an axis, the center of the enterprising outlet flow of valve body is equipped with valve seat, valve rod is connect with the matched flap of valve seat, valve rod drives flap to open and close the opening and closing for corresponding to valve on valve seat, corrugated stainless steel tubing covers on valve rod, and bellows lower end is welded on the lower end of valve rod, to prevent process fluid etch valve rod；Static seal is constituted between valve rod upper end bellows upper end flange insertion valve body and valve deck；Valve rod and a vertical keyway is opened up with the adjacent valve deck position of valve rod, the antirotation keys of insertion keyway are equipped in the common keyway of valve rod and valve deck, the length of keyway is greater than anti-rotation key length；Position of the valve rod above bellows is equipped with the sealing of Packing seat, composite filling.It is best suited on the pipeline of the media such as steam, inflammable, explosive, conduction oil, high-purity, toxic.

Description

A kind of high-pressure resistant corrugated pipe shut-off valve

Technical field:

The utility model relates to a kind of shut-off valves, are especially adapted for use in the high pressure resistant wave that petroleum, chemical industry, power field are applied Line pipe shut-off valve.

Background technique:

With the high speed development of the national economy in China, existing petroleum, chemical industry, chemical fertilizer, pesticide, chemical fibre, papermaking, system The purification device pipeline control system of the industrial departments such as sugar, food, power station and agricultural or even living facilities, to pipe-line system into The special valve of row switch control.It is especially adapted for use in the pipe of the media such as steam, inflammable, explosive, conduction oil, high-purity, toxic Road carries out dual cut-off sealing.

It is least readily exactly to seal for the valve of the media such as steam, inflammable, explosive, conduction oil, high-purity, toxic, The deficiency of existing product: traditional shut-off valve, it is not high pressure resistant.It cannot be sealed well under high-pressure situations.Easily leakage, sealing surface is not It 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 be Dual-seal is carried out under high-pressure situations.But the structure of bellows may make valve rod keep stable runnability can be difficult, meeting Situations such as having situations such as deflection of valve rod that can make ripple tube damage.

Utility model content:

The utility model aim is to propose a kind of high-pressure resistant corrugated pipe shut-off valve, and valve rod passes through the positioning device being equipped with (i.e. Antirotation keys) the vertical of valve plate is kept, when valve opening and closing, valve rod can limit operation, have and be not easy to leak, sealing surface is wear-resisting The advantages that damage and corrosion-resistant, long service life.

The technical solution of the utility model is a kind of high-pressure resistant corrugated pipe shut-off valve, including valve body, flap, valve rod, valve Seat, bellows, antirotation keys, valve deck, Packing seat, composite filling；Valve body is equipped with inlet and outlet, imports and exports on an axis, valve The center of the enterprising outlet flow of body is equipped with valve seat, and valve rod is connect with the matched flap of valve seat, and valve rod drives flap to open on valve seat The opening and closing of corresponding valve is closed, corrugated stainless steel tubing covers on valve rod, and bellows lower end is welded on the lower end of valve rod, to prevent technique Fluid etch valve rod；Static seal is constituted between valve rod upper end bellows upper end flange insertion valve body and valve deck；Valve rod and and valve rod Adjacent valve deck position opens up a vertical keyway, the interior antirotation keys for being equipped with insertion keyway of the common keyway of valve rod and valve deck, key The length of slot is greater than anti-rotation key length；The sealing that position of the valve rod above bellows is equipped with Packing seat, composite filling is constituted.

If the valve stem packing of ripple tube failure can also avoid leaking, bellows is welded in the runnability that valve rod keeps stable, keeps away Exempt to cause valve rod to vibrate since valve plug vibrates.It is best suited for the media such as steam, inflammable, explosive, conduction oil, high-purity, toxic On pipeline.

The utility model is equipped with eyelet bolt and nut for installing valve deck.

The utility model uses bellows knot using bellows stop valve closure valve deck and valve body, bellows stop valve inside The bellows lower end of structure, stainless steel is welded on valve rod, to prevent process fluid etch valve rod；The bellows other end is placed in valve body Static seal is constituted between valve deck.If can also avoid leaking using dual Seal Design ripple tube failure valve stem packing, ripple Pipe is welded in the runnability that valve rod keeps stable, avoids causing valve rod to vibrate since valve plug vibrates.Be best suited for steam, it is inflammable, On the pipeline of the media such as explosive, conduction oil, high-purity, toxic.

The utility model has the advantages that the utility model bellows stop valve product has the following advantages that, inside the bellows stop valve Using bellows, corrugated stainless steel tubing covers on valve rod, and the bellows lower end of stainless steel is welded on the lower end of valve rod, to prevent work Skill fluid etch valve rod；Using eyelet bolt nut seal valve deck and valve body, the constraint of valve rod key and slot makes the valve rod in valve deck Vertical movement；Valve rod upper end bellows upper end is placed between valve body and valve deck (flange insertion) and constitutes static seal.Using dual Seal Design, position of the valve rod above bellows is equipped with Packing seat, composite filling seals, if ripple tube failure valve stem packing It can avoid leaking, bellows is welded in the runnability that valve rod keeps stable, avoids causing valve rod to vibrate since valve plug vibrates.It is most suitable Pipeline for the media such as steam, inflammable, explosive, conduction oil, high-purity, toxic.And valve body solid forging structure, guarantee Intensity reaches long service life.Using high voltage bearing bellows, guarantee the sealing performance under high pressure working condition.Using Anti- bellows rotational structure；Guarantee that bellows is not destroyed, guarantees bellows working performance.It is set equipped with dual airtight and watertight padding case Meter, sealed reliable.Flap and sealing surface use built-up welding different hardness alloy.Wear-resistant and corrosion resistance is strong；It is applied widely.

Detailed description of the invention:

FIG. 1 is a schematic structural view of the utility model.

Specific embodiment:

As shown in Figure 11, valve body, 2, flap, 3, valve rod, 4, high-pressure resistant corrugated pipe, 5, antirotation keys, 6, valve deck, 7, filler Pad, 8, composite filling, 9, eyelet bolt, 10, nut, 11, packing press ring, 12, gland, 13, valve stem nut, 14, lubrication Gasket, 15, handwheel, 16, the tight bolt of spelling.

A kind of high-pressure resistant corrugated pipe shut-off valve as shown in the figure, including valve body, flap, valve rod, high-pressure resistant corrugated pipe, anti-rotation Key, valve deck, valve deck, Packing seat, composite filling, eyelet bolt, nut, packing press ring, gland, valve stem nut, lubricating pad Piece, spells tight bolt at handwheel；Valve body is equipped with inlet and outlet, and on an axis, the center of the enterprising outlet flow of valve body is set inlet and outlet There is valve seat, valve rod is fixedly connected with the matched flap of valve seat, valve rod is fixedly connected on the upper end of flap, and valve rod drives flap in valve The opening and closing of corresponding valve is opened and closed on seat, corrugated stainless steel tubing covers on valve rod, and bellows lower end is welded on the lower end of valve rod, valve rod Upper end bellows upper end flange, which is embedded between valve body and valve deck, constitutes sealing；Valve rod and one is opened up with the adjacent valve deck position of valve rod The antirotation keys of insertion keyway are equipped in the common keyway of vertical keyway, valve rod and valve deck, the length of keyway is greater than anti-rotation bond distance Degree；Valve rod can move a distance in the extra interstitial site of the length of keyway, and valve rod uses dual Seal Design, valve rod Position above bellows is equipped with the sealing of Packing seat, composite filling, and packing press ring and gland compress composite filling；It fills out Material guarantees the sealing of following situation: if the valve stem packing of ripple tube failure can also avoid leaking, bellows is welded in valve rod and keeps stablizing Runnability, avoid due to valve plug vibrate cause valve rod to vibrate.Be best suited for steam, inflammable, explosive, conduction oil, high-purity, On the pipeline of toxic equal media.Also guarantee the stabilization that valve rod is run up.It is with valve body using eyelet bolt nut seal valve deck Valve deck is installed, the constraint of valve rod key and slot makes the valve rod in valve deck move vertically；Corrugated stainless steel tubing shut-off valve critical component gold Belong to bellows, lower end and valve rod assembly to weld using automatic seam-welding, upper end and connecting plate are embedded in, between fluid media (medium) and atmosphere Form a metallic barrier, it is ensured that the zero leakage around valve rod.

Flap uses conical design, is embedded in respective valve bore, and sealing surface and medium streamlining, sealing performance is more preferable, The service life is longer；Packing press ring, gland compress Packing seat, composite filling, constitute dual Seal Design (bellows + filler) if ripple tube failure, valve stem packing can also avoid leaking, and meet international seal standard.Valve rod is topmost equipped with spiral shell Valve stem nut is installed in line, valve rod upper end, and the screw thread of valve stem nut is matched with the internal screw thread of handle, and handle is that tight spiral shell is spelled in upper end installation Mother tightens valve stem nut, and rotating handle can make the up and down motion of valve rod and drive the movement of valve flap, thus opening/shutting valve； Jam nut is by being lined with the fixed valve stem nut of lubricating gasket.

The utility model is equipped with eyelet bolt and nut for installing valve deck.The utility model is closed using bellows stop valve Valve deck and valve body to be closed, uses bellows structure inside bellows stop valve, the bellows lower end of stainless steel is welded on valve rod, with Prevent process fluid etch valve rod；The bellows other end, which is placed between valve body and valve deck, constitutes static seal.Using dual sealing If design the valve stem packing of ripple tube failure can also avoid leaking, bellows is welded in the runnability that valve rod keeps stable, avoid by Valve rod is caused to vibrate in valve plug vibration.It is best suited for the pipeline of the media such as steam, inflammable, explosive, conduction oil, high-purity, toxic On.

The foregoing is merely an embodiment of the present invention, are not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc. within the spirit and principle of utility model, to be included in the utility model Protection scope within.

Claims (2)

1. a kind of high-pressure resistant corrugated pipe shut-off valve, characterized in that including valve body, flap, valve rod, valve seat, bellows, antirotation keys, Valve deck, Packing seat, composite filling；Valve body is equipped with inlet and outlet, imports and exports on an axis, in the enterprising outlet flow of valve body Centre is equipped with valve seat, and valve rod is connect with the matched flap of valve seat, and valve rod drives flap to open and close the opening and closing for corresponding to valve on valve seat, no Rust corrugated steel pipe covers on valve rod, and bellows lower end is welded on the lower end of valve rod, to prevent process fluid etch valve rod；On valve rod Static seal is constituted between end bellows upper end flange insertion valve body and valve deck；Valve rod and one is opened up with the adjacent valve deck position of valve rod The antirotation keys of insertion keyway are equipped in the common keyway of vertical keyway, valve rod and valve deck, the length of keyway is greater than anti-rotation bond distance Degree；The sealing that position of the valve rod above bellows is equipped with Packing seat, composite filling is constituted；Flap uses conical design, insertion In the hole of respective valve seat.

2. high-pressure resistant corrugated pipe shut-off valve according to claim 1, characterized in that equipped with eyelet bolt with nut for pacifying Fill valve deck.