CN2296938Y

CN2296938Y - Rotary gate valve

Info

Publication number: CN2296938Y
Application number: CN 97217610
Authority: CN
Inventors: 梁华军
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-05-17
Filing date: 1997-05-17
Publication date: 1998-11-11
Anticipated expiration: 2007-05-17

Abstract

The utility model discloses a rotary gate valve used for controlling coal gas, semi-water gas and air in a chemical engineering piping system, comprising a valve rod which is inserted in a valve body, valve plates which are pressed on a valve seat and a cross axle which is sheathed on the valve rod. The both ends of the transverse axle of the cross axle are sheathed with the valve plates, and at least two draw rods which are hinged on the valve rod are hinged with the central sleeve barrels of the valve plates in an oblique drawing mode. The outer end of the valve rod is sheathed with a guide way of which inner part is provided with a spiral sideway, and a guide wheel which is installed on the valve rod is arranged in the slideway. The valve can avoid the abrasion of the valve plates and the valve seat, and the overflowing resistance is small.

Description

Rotary gate valve

The utility model relates to a kind of rotary gate valve that the chemical industry pipe-line system is controlled coal gas, semi-water gas, air that is used for.

Control valve on the chemical industry pipe-line system mainly contains two classes, one class is a gate valve, its structure be in valve body by valve rod drive wedge with two valve plate turgor pressures on valve seat, its shortcoming is in the opening-closing process, and valve plate promotes valve plate and relies on the low one side valve seat of pressure under the effect of inlet end pressure medium, when last poppet-valve plate, make the valve plate and the prooving of valve seat, cause leakage, influence is used.Another kind of is base-plate valve, and its structure is directly to drive a valve plate seat by valve rod to be enclosed on the valve seat in valve body, and medium is at right angles formula discharge in valve body, and its shortcoming is that the fed sheet of a media resistance is big.

The utility model purpose provides a kind of promptly the overcome valve plate and the prooving of valve seat, crosses the little rotary gate valve of flow resistance again.

The utility model purpose is achieved in that rotary gate valve comprises valve body, insert valve rod in the valve body and press seal advance, valve plate on the valve mouth.Socket one cross axle on the valve body inner valve stem, the cross axle longitudinal axis is enclosed within on the valve rod.Two valve plates are enclosed within respectively on the cross axle transverse axis two ends by its cylindrical central sleeve.The other end that is hinged at least two pull bars on the valve rod tiltedly draws hinged with two valve plate cylindrical central sleeves respectively.The valve rod outer end is with a guide way, and the spiral slideway of two symmetries is arranged on the guide way internal surface circumference, and spiral slideway divides two sections of straightway and tunes, and the guide wheel that places in the slideway is installed on this place's valve rod.Valve opening and closing is by hydraulic control or manually control.

Its working principle is: in the time of opening valve, last poppet-valve bar, inwardly move in opposite directions by its upper connecting rod pulling valve plate, valve is opened by Zhejiang, guide wheel on the valve body outer end is in the spiral slideway straightway at this moment, after guide wheel enters curved section, drive on the valve rod and move and rotate, can revolve to the curved section terminal point and to turn 90 degrees, with porting central vertical become with porting center line parallel when valve plate is by beginning this moment, medium directly passes through from suction port to relief opening, is straight-through type, reduces medium and crosses flow resistance.Otherwise valve plate tiltedly draws under the effect closedtop on valve seat at pull bar, guarantees sealing.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Fig. 1 is the utility model structure diagram.

Referring to Fig. 1, rotary gate valve comprises a valve body 1, connects a guide way 2, hydraulic jack 3 on it in turn, and valve rod 4 places in the valve body 1 and inserts in guide way 2 and the oil cylinder 3.In valve body 1, be with cross axle 5 on the valve rod 4, the cross axle longitudinal axis 6 is enclosed within on the valve rod 4, and lower end and valve body 1 are pegged graft, and cross axle transverse axis 7 two ends respectively are with valve plate 8, and valve plate 8 passes through its cylindrical central sleeve 9 and transverse axis 7 sockets, and along sliding on it.Pull bar 10 1 ends are hinged by bearing pin 11 and valve rod 4, and the other end is hinged by bearing pin 12 and sleeve 9.Pull bar 10 is four, and wherein left side pull bar 10 and the right pull bar 10 front and back are each two.Per two hinged by bearing pin 12 with valve plate cylindrical central sleeve 9 symmetries.On the guide way 2 internal surface circumference symmetrical spiral slideway is arranged, be divided into straightway 13 and curved section 14, slideway is a fluted body.Valve rod 4 is in 2 sections of the guide waies a guide wheel 15, and guide wheel 15 places in the groove, and valve rod 4 upper ends are inserted in the hydraulic jack 3.

Fig. 1 valve is in closed condition.During Open valve, pressure oil enters from chamber, 3 end of oil cylinder, move on the valve rod 4, guide wheel 15 moves in slideway straightway 13, pull bar 10 is with moving on the valve rod 4 and spur two sleeves 9 and inwardly move along cross axle transverse axis 7 is parallel, drive valve plate 8 and lift off a seat 16, when guide wheel 15 enters slideway curved section 14, force valve rod 4 to rotate around the axle center, and drive valve plate 8 rotations, when guide wheel 15 is in curved section 14 terminal points last carrying simultaneously, valve rod 4 drives valve plate 8 rotation an angle of 90 degrees, make valve plate 8 parallel with valve porting center line, valve is in maximum open position, helps medium by reducing resistance.Otherwise during throttle down, oil cylinder 3 epicoeles advance pressure oil, and valve rod moves down, and drive valve plate 8 closedtops on valve seat 16.When valve is in closed condition, is the coal gas that retains in getting rid of, or leaks the coal gas that produces, avoid blast to produce, when valve was in the closed position, valve rod 4 moved down into minimum point and backs down dish valve 17, and then the coal gas in the valve body 1 is in 18, the 19 inflow atmosphere of duct.Dish valve 17 is installed in valve rod 4 lower ends and stretches out valve body 1 place,

Advantage of the present utility model and good effect are: possess the in the past advantage of slide valve and base-plate valve 1.. It is tool The slide valve straight-through structure is arranged, and it is little to cross flow resistance, and the energy self-locking had again the base-plate valve sealing effectiveness after power disappeared Good characteristics. The inlet and outlet mouth of valve is on same center line, and valve plate 8 is vertically lifted off a seat earlier when opening After turn to parallel with the porting center line, reduced and crossed flow resistance and the valve seat that do not wear and tear. The valve plate closedtop on valve seat, Its structure seals when having guaranteed work with the base-plate valve sealing means. 2. in the past slide valve and base-plate valve have been overcome The shortcoming valve plate is in opposite directions mobile, can not wear and tear valve seat and causes leaking. Valve plate rotates when carrying, and reduces on the valve rod The journey of beginning a new line reduces movingly for consuming, and raises the efficiency. 3. energy-conservation, safety.

Claims

1. rotary gate valve, comprise valve body (1), the valve rod (4) and the press seal that insert in the valve body (1) are advancing, valve plate on the valve mouth (8), it is characterized in that valve body inner valve stem (4) goes up socket one cross axle (5), the cross axle longitudinal axis (6) is enclosed within on the valve rod (4), two valve plates (8) are enclosed within respectively on cross axle transverse axis (7) two ends by the sleeve (9) at its center, the other end that is hinged at least two pull bars (10) on the valve rod (4) tiltedly draws hinged with two valve plates (8) cylindrical central sleeves (9) respectively, valve rod (4) outer end is with a guide way (2), the spiral slideway that two symmetries are arranged on guide way (2) the internal surface circumference, spiral slideway is divided into (14) two sections of straightway (13) and curved sections, and the guide wheel (15) that places in the slideway is installed on this place's valve rod (4).

2. according to the described rotary gate valve of claim 1, it is characterized in that pull bar (10) is four, wherein per two hinged by bearing pin (12) and valve plate cylindrical central sleeve (9) symmetry.

3. according to claim 1 or 2 described rotary gate valves, it is characterized in that the symmetrical spiral slideway on guide way (2) the internal surface circumference is a fluted body.

4. according to the described rotary gate valve of claim 3, it is characterized in that valve rod (4) lower end stretches out valve body (1) and locate also to be equipped with the dish valve (17) that valve rod (4) can back down.