CN2344615Y

CN2344615Y - Hardened sealing ball valve

Info

Publication number: CN2344615Y
Application number: CN 98217004
Authority: CN
Inventors: 兰静雄
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-07-10
Filing date: 1998-07-10
Publication date: 1999-10-20
Anticipated expiration: 2008-07-10

Abstract

The utility model relates to a hard sealing ball valve, comprising a valve body, a valve core, a sealing seat, a valve rod, a valve cover and a hand wheel. The lower end of the valve rod is fixedly connected with a driving gear which is engaged with a running gear. A thrust shaft is tightly fitted through the circular hole of the center of the running gear. The upper end of the thrust shaft is matched with a spring in the groove which is arranged on the valve cover along axis direction, and the lower end of the thrust shaft is in clearance matched with the valve core. The valve core in the bottom is movably connected with the valve body by steel balls. A gap groove which is formed on the arc hem of one side of the running gear is matched with a locating pin which is fixed on the valve cover. The utility model overcomes the defects that the ordinary hard sealing ball valve is easy to abrade, and the service life is short. The utility model has the advantages of no leakage and long service life, and is especially suitable for large caliber valves.

Description

Hard seal ball valve

The utility model relates to a kind of hard seal ball valve.

Ordinary ball valve, generally all be based on soft seal, generally these have flexible nonmetallic material and make sealing seat with teflon or rubber, by them spool is clamped, reach sealing, still, because these nonmetallic material can not be born high temperature or high pressure, thereby dwindled their using scope greatly, therefore just required hard seal ball valve to replace, to adapt to the Environmental Conditions of High Temperature High Pressure.Traditional hard seal ball valve, all be to copy the nonmetallic material encapsulating method, with elastic element sealing seat is pressed in tightly and reaches sealing on the spool, but when valve opens or closes at every turn, all will produce sliding friction strong between spheroid and sealing seat, the damage sealing surface, thus cause valve very easily to leak, have a strong impact on working life.

The purpose of this utility model is the above-mentioned defective that overcomes prior art, thereby a kind of simple in structure, hard seal ball valve of not having wearing and tearing, zero leakage is provided.

The utility model comprises valve body, spool, sealing seat, valve rod, valve gap and handwheel, the affixed driving gear in the lower end of valve rod, driving gear is meshed with walking gear, the thrust axis close-fitting passes the circular hole at walking gear center, its the upper end match with the spring along in the groove of axial direction setting of valve gap, lower end and spool Spielpassung, spool in the bottom by steel ball and valve body loose joint, form gap slot on the one side arc limit of walking gear, gap slot matches with locating stud on being fixed on valve gap.

Further illustrate particular content of the present utility model below in conjunction with drawings and Examples.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the assembly relation schematic representation between driving gear and walking gear.

As shown in the figure, the utility model comprises valve body 1, spool 2, sealing seat 3, valve rod 4, valve gap 5 and handwheel 6, the affixed driving gear 7 in valve rod 4 lower ends, driving gear 7 is meshed with walking gear 8, thrust axis 9 close-fittings pass the circular hole at walking gear 8 centers, the one end matches with the spring 11 along in the groove 10 of axial direction setting of valve gap 5, lower end and spool 2 Spielpassung, spool 2 passes through steel ball 14 and valve body 1 loose joint in the bottom, form gap slot 12 on the one side arc limit of walking gear 8, gap slot 12 matches with locating stud 13 on being fixed on valve gap 5.The arc of striding of gap slot 12 just in time is that the diameter of locating stud 13 adds 90 degree.Under opening state, spool 2 does not contact with sealing seat 3.When turning clockwise handwheel 6, driving gear 7 rotates in the same way, and drives with the walking gear 8 and thrust axis 9 inhours of its engagement and rotate, and spool 2 is closed along counterclockwise direction, and does not rub with sealing seat 3 when closing.After locating stud 13 is run on 12 left sides of the gap slot on the walking gear 8, under the effect of contraction of driving gear 7, locating stud 13 and groove 10, walking gear 8 and thrust axis 9 move along groove 10 straight lines in the valve gap 5, spool 2 is swung towards sealing seat 3 directions around steel ball 14, and be pressed in the dead valve of sealing seat 3 shangguans.During unlatching, unclamp handwheel 6, under the effect of spring 11, thrust axis 9, walking gear 8, spool 2 reset, and sealing seat 3 and spool 2 are broken away from, and produce certain space.Continue to unclamp handwheel 6, at the drive of driving gear 7 and walking gear 8 with it under the transmission of the thrust axis 9 of close-fitting, spool 2 is opened valve along clockwise direction, and when locating stud 13 contacted with the right of gap slot 12, valve wide open put in place.

The utility model is by above-mentioned concrete structure, ball valve is greatly improved in directions such as using scope, working lifes, and it is also very good aspect technology capability, be particularly suitable for large bore valves, if mix actuating devices such as electronic or pneumatic, the automation control of industrial process will be easy to realize.

Claims

1, a kind of hard seal ball valve, comprise valve body, spool, sealing seat, valve rod, valve gap and handwheel, it is characterized in that: the affixed driving gear in valve rod (4) lower end (7), driving gear (7) is meshed with walking gear (8), thrust axis (9) close-fitting passes the circular hole at walking gear (8) center, match with the spring (11) along in the groove (10) of axial direction setting of valve gap (5) in its upper end, lower end and spool (2) Spielpassung, spool (2) passes through steel ball (14) and valve body (1) loose joint in the bottom, form gap slot (12) on the one side arc limit of walking gear (8), gap slot (12) matches with locating stud (13) on being fixed on valve gap (5).