CN2103051U

CN2103051U - Self-balance clevice for cut-off valve

Info

Publication number: CN2103051U
Application number: CN 91220092
Authority: CN
Inventors: 李景海
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-07-24
Filing date: 1991-07-24
Publication date: 1992-04-29

Abstract

The utility model relates to a self-balance device for a cut-off valve, which is suitable for the stable internal by-pass device of big, medium and small path cut-off valves. The opening state: the taper surface 16 of a valve rod is contacted with the lower taper surface 10 of a valve clack, and the upper taper surface 11 of the valve clack is contacted and is sealed with the upper seal 14 of a valve cover. In the process of opening and closing the valve, the locking nut of a guide pin 6 dose the guiding motion in the guide hole 20 of a cylinder. The main valve clack 1 and the valve rod 4 are in the stable state. The harmful vibration and noises are avoided, the accidents caused by the damage of a valve gate is eliminated, and the damage is caused by the reasons above. The service life of the valve gate is extended, and the safe operation of equipment is ensured.

Description

Self-balance clevice for cut-off valve

The utility model is applied to fluid control field, valve industry, is improving and development of " stop valve internal bypass device ".

" stop valve internal bypass device " is a kind of novel structure of compactness, can little, in, on the class valve, the using of big latus rectum, be the domestic development that only can be used for part latus rectum, the big original internal bypass technology of latus rectum.

" stop valve internal bypass device " (hereinafter to be referred as prior art) exists incomplete place, shows: in the process of opening, closing, under the effect of fluid laminar flow, turbulent flow, main valve clack plays pendulum; In the full open position, main valve clack then is in harmful vibrational state always.Because it is shorter to open, close the time of closed procedure, so the valve latus rectum hour, the former problem is outstanding, but the latter, will badly influence the working life of valve, potential because valve infringement and the danger of generation accident.

Prior art (Fig. 3), this is to rise when valve rod, the last plane of locking nut 5 and flap cover 7 lower plane and contact and progressively main valve clack 1 is mentioned by it, seal 14 on valve rod conical surface 16 and the valve gap and contact and seal, the key plan during full open.Under the effect of the laminar flow of fluid, turbulent flow, main valve clack 1 exists axially and nuisance vibration radially and noise with valve rod 4.

Above disadvantage exists in known internal bypass technology equally.

The purpose of this utility model then is the problem at above-mentioned existence, has designed a kind of large, medium and small latus rectum that is applicable to, the stop valve self balancing device of stable type.

The utility model design solution: with valve rod conical surface 16(Fig. 3 of prior art) design is at flap lid 7(Fig. 1) and locking nut 5(Fig. 1) between, with the flap of prior art lid 7(Fig. 3) change flap lid 7(Fig. 1 into) structure, flap lid conical surface 10(Fig. 1 is down arranged at its bottom), itself and valve rod conical surface 16(Fig. 1) between distance, be satisfied with secondary flap 2(Fig. 1) mention the fully requirement of pressure release.

Its concrete solution is:

A kind of by main valve clack 1, secondary flap 2, hoisting nut 3, valve rod 4, locking nut 5, pilot pin 6, flap lid 7, Cock screw 8, the stop valve self balancing device that junction of the edges of two sheets of paper screw 9 is formed, the main valve clack 1 center main relief hole 23 that drills and reams, lower sidewall has several secondary relief holes 22, pack into the cylindrical hole of valve rod 4 threaded end of secondary flap 2 afterbody cylindrical bodys, locking nut 5, hoisting nut 3 successively screws in valve rod 4 threaded end and tight, it is characterized in that, locking nut 5 is tabular, cylinder guide hole 20 is arranged, flap lid 7 is solid of rotation that mesopore is arranged, throttling groove 15 is arranged in the mesopore, last conical surface 11 is arranged at top, following conical surface 10 is arranged at the bottom, the cylinder step hole is arranged, excircle has outside thread, pilot pin 6 is multidiameter shafts that butt end and thin end are arranged, pilot pin 6 butt ends are pressed into flap and cover 7 cylinder step holes, with 9 tightenings of junction of the edges of two sheets of paper screw, flap covers 7 mesopores and is inserted in valve rod 4 and carefully holds, and pilot pin 6 is carefully held in locking nut cylinder guide hole 20, clamps that flap covers 7 outside threads and main valve clack 1 upper internal threaded screws, with Cock screw 8 tightenings, valve rod 4 threaded end have conical surface 16, and the position is after flap lid 7 and main valve clack 1 screw, and flap covers on 7 lower planes and the locking nut 5 between the plane.

Advantage of the present utility model:

The utility model can be widely used in the internal bypass of the stop valve of large, medium and small latus rectum, substitutes outer bypass system, has saved outer bypass and auxiliary-valve, can also be replaced by the boosting mechanism that strengthens moment and set up, and greatly reduces the consumption of the energy and material;

The utility model is by means of the hydrodynamic pressure reinforced seal, thereby sealing is reliable; By means of the pressure balance opening/shutting valve of fluid, thereby operate light.

The utility model main valve clack and valve rod are in steady state in the process and the full open position of opening, close, and have avoided harmful vibration.

Upper and lower sealing of the present utility model can obtain stable sealing strip, good seal performance;

The utility model is made, and maintenance is easy, and the life-span is long, and is safe and reliable.

Fig. 1 is the utility model closed condition structural drawing.

Fig. 2 is the utility model opening state structural drawing.

Fig. 3 is prior art " stop valve internal bypass device " opening state structural drawing.

1 is main valve clack among the figure, the 2nd, secondary flap, the 3rd, hoisting nut, the 4th, valve rod, the 5th, locking nut, the 6th, pilot pin, the 7th, the flap lid, the 8th, Cock screw, the 9th, junction of the edges of two sheets of paper screw, the 10th, the flap lid is conical surface down, the 11st, flap covers conical surface, the 12nd, valve gap, the 13rd, filler, the 14th, seal on the valve gap, the 15th, flap lid throttling groove, the 16th, valve rod conical surface, the 17th, valve body, the 18th, the valve body throttling groove, the 19th, the main valve clack throttling groove, the 20th, locking nut cylinder guide hole, the 21st, the spot welding of locking nut and hoisting nut connecting part, the 23rd, main relief hole, the 24th, fluid inlet, the 25th, fluid output.

Below in conjunction with Fig. 1, Fig. 2 the utility model is further described:

Now one by one each part of the present utility model is done and is described in detail according to Fig. 1:

Main valve clack 1 is a hollow solid of rotation, relief hole 23 is arranged at the bottom, lower sides has secondary relief hole 22, inner chamber top has and can cover 7 internal threads that screw with flap, upper portion side wall has the internal thread and the throttling groove 19 that can screw with Cock screw 8, secondary flap 2 is solid solid of rotation, conical surface is arranged at the bottom, afterbody has the cylinder of the valve rod 4 threaded end cylindrical holes of can packing into, hoisting nut 3 is solid of rotation of a hollow, in the internal thread that can screw with valve rod 4 threaded end is arranged, locking nut is that bar shaped is tabular, there is the internal thread that can screw with the threaded stem end centre, both sides have 2 can with the thin end of pilot pin cylinder guide hole 20 movingly, the butt end of 2 pilot pins 6 is pressed into the cylinder step that flap covers 7 both sides, and thin end then can move in locking nut 4 both sides cylinder guide holes 20, cylinder guide hole 20 also but the hole of opening.Flap lid 7 is solid of rotation of a hollow, the centre have can with the thin end of valve rod 4 holes movingly, both sides have 2 can with the step cylindrical hole of pilot pin butt end press fit, the bottom has conical surface 10 to contact and to seal with the valve rod conical surface, step is arranged at top, there is conical surface 11 to contact and to seal on the step with the sealing 14 that closes the lid, Cock screw 8 can screw in the tapped hole of main valve clack 1 upper portion side wall, compress flap lid 7, junction of the edges of two sheets of paper screw 9 can screw in the junction of pilot pin butt end and flap lid 7 and play the tightening effect.

The utility model each part mutual alignment and contact:

Secondary flap 2 afterbody cylinders pack into valve rod 4 threaded end cylindrical holes successively with locking nut 5, hoisting nut 3 screws in valve rod 4 threaded end, it is also tight mutually to adjust the back, can two pilot pin 6 butt ends be pressed into two cylinder step holes that flap covers 7 both sides in their junction spot welding 21 in case of necessity, with 2 junction of the edges of two sheets of paper screw 9 tightenings, then garden post borehole jack in the middle of the flap lid 7 is gone into the thin end of valve rod 4, the thin end of two pilot pins 6 of the flap lid 7 of packing into is aimed at two the cylinder guide holes 20 in both sides that enter locking nut 5, clamp flap and cover 7 upper boss, after rotation main valve clack 1 puts in place, screw in two Cock screws 8 in main valve clack 1 upper portion side wall.

Locking nut 5 of the present utility model can be to screw in valve rod 4 threaded end and hoisting nut 3 mutual and tight forms, also can be to connect form with valve rod 4 direct welding or other, and it also can be female that flap covers 7 both sides cylinder step holes.

Locking nut 5 can be that bar shaped is tabular, also can be circular tabular, when the valve latus rectum bigger, the circular tabular pilot pin number of the main valve clack 1 volume bigger appropriate to the occasion employing of deadweight can suitably increase, pilot pin 6(Fig. 2) butt end also can be with externally threaded, the precession flap covers tapped hole, 7 both sides, can use the tightening of junction of the edges of two sheets of paper screw, also can adopt other tightening forms, valve rod conical surface 16 covers circular cone 11 with following conical surface 10 of flap lid and flap and contacts with sealing surface 14 on the valve gap, and sealing also can be the plane, the sphere line, the seal form of face contact, valve body 17, main valve clack 1, designing respectively on the flap lid 7 has throttling

groove

18,19,15, play throttling, buffer function, pilot pin also can be installed conversely, and promptly the butt end of pilot pin 6 is fixed in the jam nut 5 both sides cylindrical holes, carefully holds guide movement in flap covers 7 both sides cylindrical holes.

What the utility model adopted is lifting bar.

Closed condition from Fig. 1, left-handed driving handwheel, valve rod 4 rises, secondary flap 2 is rigid joint with valve rod 4, thereby rise thereupon, fluid is by main relief hole 23 pressure releases, balance pressure reduction progressively, when progressively rising to touch under the flap lid, valve rod conical surface 16 behind the conical surface 10 flap lid 7 is mentioned, main valve clack 1 is also mentioned thereupon, in this process, pilot pin 6 is carefully held guide movement in the cylinder guide hole 20 of locking nut, main valve clack 1 does not have around axial rotation with valve rod 4, when continuing to rise to flap, valve rod 4 covers that sealing 14 contacts on conical surface 11 and the valve gap, impose suitable driving force again, valve rod conical surface 16 and flap lid circular cone 10 and flap down cover sealing 14 on conical surface 11 and the valve gap and promptly can obtain the seal pressure that needs, full open realizes (Fig. 2), at this moment go up hermetically closing, can prevent that filler 13 is subjected to fluid erosion, can also change filler at the full open state in case of necessity, in the full open position, under the effect of valve rod power, main valve clack 1 is relative static with valve rod 4, does not have around axial rotation and vibration vertically.

Claims

1, a kind of by main valve clack 1, secondary flap 2, hoisting nut 3, valve rod 4, locking nut 5, pilot pin 6, flap lid 7, Cock screw 8, the stop valve self balancing device that junction of the edges of two sheets of paper screw 9 is formed, the main valve clack 1 center main relief hole 23 that drills and reams, lower sidewall has several secondary relief holes 22, pack into the cylindrical hole of valve rod 4 threaded end of secondary flap 2 afterbody cylindrical bodys, locking nut 5, hoisting nut 3 successively screws in valve rod 4 threaded end and tight, it is characterized in that, locking nut 5 is tabular, cylinder guide hole 20 is arranged, flap lid 7 is solid of rotation that mesopore is arranged, throttling groove 15 is arranged in the mesopore, conical surface 11 is arranged at top, following conical surface 10 is arranged at the bottom, the cylinder step hole is arranged, excircle has outside thread, pilot pin 6 is multidiameter shafts that butt end and thin end are arranged, pilot pin 6 butt ends are pressed into flap and cover 7 cylinder step holes, with 9 tightenings of junction of the edges of two sheets of paper screw, flap covers 7 mesopores and is inserted in the thin end of valve rod 4 pilot pins 6 and carefully holds in locking nut cylinder guide hole 20, flap covers 7 outside threads and main valve clack 1 upper internal threaded screws, with Cock screw 8 tightenings, valve rod 4 threaded end have conical surface 16, the position is after flap lid 7 and main valve clack 1 screw, and flap covers on 7 lower planes and the locking nut 5 between the plane.

2, stop valve self balancing device according to claim 1 is characterized in that locking nut 5 is tabular or circular tabular for bar shaped.

3, stop valve self balancing device according to claim 1 is characterized in that the cylinder step hole of flap lid both sides is female, and flap covers conical surface 11, and flap lid conical surface 10 down is plane, sphere.

4, stop valve self balancing device according to claim 1 is characterized in that valve rod conical surface 16 is plane, sphere.

5, stop valve self balancing device according to claim 1 is characterized in that pilot pin 6 butt ends have the outside thread that screws mutually with the interior threaded hole of flap lid both sides.

6, the stop valve self balancing device is characterized in that the butt end of pilot pin 6 can be fixed in the locking nut 5 both sides cylinder step holes according to claim 1 or 5, and thin end is in flap lid both sides cylinder guide hole 20.

7, stop valve self balancing device according to claim 1 is characterized in that cylinder guide hole 20 is holes of opening.