CN1034192C

CN1034192C - Double-gate type rotary valve

Info

Publication number: CN1034192C
Application number: CN 92105642
Authority: CN
Inventors: 韩榕
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-18
Filing date: 1992-07-18
Publication date: 1997-03-05
Anticipated expiration: 2007-07-18
Also published as: CN1081500A

Abstract

The present invention relates to a rotary valve with double valve plates. A locking nut is arranged on a worm shaft, a throttle pipe flange is connected with a valve body, and a throttle plate is connected with valve plates and a valve rod. The surfaces of the valve body and the valve plates are respectively provided with a sealing surface in the shape of a circular ring, the surfaces are in hard sealing by metal, and the lower part of the valve rod is provided with a positioning device which ensures the good sealing performance. The rotary valve has the advantages of compact structure, light weight, and small coefficient of flow resistance. The rotary valve can replace a butterfly valve, a ball valve and a stop valve.

Description

Double-gate type rotary valve

The present invention relates to a kind of double-gate type rotary valve, be used for pipeline and open and close and Flow-rate adjustment, belong to the technical field of valve.

Generally using valves such as butterfly valve, ball valve, stopcock, gate valve, stop valve aspect pipeline keying and the Flow-rate adjustment at present, the flow resistance coefficient of these valves is little, compact structure, volume is also little, but shortcoming is to do soft seal with the nonmetallic material pairing, general work temperature≤150 ℃, working pressure≤4MPa.The existing ball valve that adopts elastic metallic sealing butterfly valve of producing and the seal ring that adopts the China ink that rockfills in the metal collar or the metal o-ring of refining seal groove is arranged in home and abroad, but because processed complex, the exigent influence of accuracy of manufacturing, cost of production is too high, so only be applicable to some special place.Stopcock is subjected to machining accuracy, the restriction of quality of fit and variation of ambient temperature influence, only be applicable to the working environment under the low normal pressure and temperature, moving linearly, for example flashboard in addition, flap, they change in the endoceliac position height of valve, change cross section of fluid channel and amass the purpose that realizes regulating flow and keying, these valves can select for use various alloy material pairings to make seal ring (face), so adaptability is strong, using scope is also wide, its shortcoming is that gate valve all seals with the wedge-type of tapering, the manufacturing process complexity, the requirement on machining accuracy height, interchangeability is poor, the runner bending of stop valve, flow resistance coefficient is big, and the power of closing is big, and structure is long, volume heaviness, diameter are generally below 250 millimeters.

The objective of the invention is to provide a kind of double-gate type rotary valve, and it can overcome above-mentioned deficiency, compact structure, and weight is lighter, and is easy and simple to handle, and flow resistance coefficient is little, and using scope is wide, can replace butterfly valve, ball valve, stop valve and gate valve.

The object of the present invention is achieved like this, the bivalve plate comprises valve plate and Rectifier plate, the effect that valve plate seals and the convection cell throttling is controlled when small flow, and valve plate is only in valve opening and rev down process rev, flow increases suddenly or reduces, rely on the barrier effect of convection cell to increase flow resistance, make flow gradual, thereby reach the purpose of regulating flow.

Valve body is connected with taper pin with Rectifier plate, setscrew nut is fixed by bolts under the valve body above the neck endoporus concave surface, holding down bolt is connected with nut, connecting sleeve makes holding down bolt be connected with valve rod, under valve body, in the neck flange end locking gasket is housed, use the bolt bottom again, valve plate and valve plate are hinged in the valve body, locking nut is housed on worm shaft, can be used to eliminate the influence in gap between worm and gear, annular sealing surface all is processed on favorable sealing property and valve body and valve plate surface when guaranteeing valve closing, and the life-span is long, good seal.

Compared with prior art, double-gate type rotary valve has following advantage:

1, compact structure, length is short, and energy consumption is low, and its weight is also little, has only 72% of gate valve weight, 40% of stop valve.

2, adopt annular sealing surface between valve body and the valve plate, and be metallic material, good seal performance, long service life, not easy to wear.

3, the self-locking action of locking nut in the Worm gear case and worm screw can be eliminated the ship influence of moving sideshake of worm and gear, guarantees that valve has excellent sealing performance.

4, the positioning device of being made up of connecting sleeve, holding down bolt, nut, locking gasket can be aligned because the assembly error that machining error produces.

The schematic representation of Fig. 1 double-gate type rotary valve

The plan view of Fig. 2 double-gate type rotary valve

The schematic representation of Fig. 3 Worm gear mechanism

Now in conjunction with the accompanying drawings the structure of double-gate type rotary valve is described in detail:

Control valve opens and closes Worm gear case 2 and fixedlys connected with bolt 18 with the upper flange of support 3 with box flange, the following end flange of support 3 also is fixed on above the top neck portion flange of valve body 7 of this rotary valve with bolt 19, valve rod 4 is connected with worm gear 32 usefulness flat keys 20 in the Worm gear case 2, valve rod 4 is fixing with 2 φ of Rectifier plate 8 usefulness, 10 taper pins 21,4 M8 bolts 22 of setscrew nut 15 usefulness are fixed on the concave surface of following neck endoporus of valve body 7, holding down bolt 14 and setscrew nut 15 are done being connected movingly with screw thread, by two connecting sleeves of forming 13 holding down bolt 14 and valve rod axially are connected for 4 one-tenth.Rotating position bolt 14 can make valve rod 4 move axially, and is used for aligning the position of valve plate 9 in valve body 7 inner chambers, and sealing surface is overlapped mutually.In 7 times neck flanged surfaces of valve body, be equipped with to protect and remove pad 16, can prevent that holding down bolt 14 from rotating in the rotary closure process, bottom 17 usefulness bolts 23 are fixed on above 7 times neck flanges of valve body, the assurance valve seal is functional, Gland 5 is contained on valve rod 4 and the valve body 7 between the neck flange, be used for compressing and be contained in the filler 6 between the neck flange on valve body 4 and the valve body 7, guaranteed that valve body has excellent sealing performance.

Valve body 7 is made by stainless steel, and throttle pipe flange 12 also links into an integrated entity with M24 bolt 24 and valve body 7 right-hand members, and valve plate lid 11 is hinged valve plate 9 and valve shaft 10 in valve body 7 cavitys, and the worm shaft right-hand member of Worm gear case 2 is equipped with handwheel 25, and locking nut 1 is equipped with on the left side.

Accompanying drawing 2 is that overlook (the analysing and observe) of double-gate type rotary valve schemed, valve body 7 right-hand members are connected with throttle pipe flange 12 usefulness bolts 24, between valve body 7 right sides and the flange sealing gasket 28 is arranged, valve plate 9 left sides are circular flats, and the right side is a conical surface, middle body has circular groove, the valve plate of packing in groove lid 11, the inner chamber of valve plate lid 11 and the left end globulate of valve shaft 10 are hinged, and Rectifier plate 8 also is a globular hinge with valve rod 4, valve shaft 10 right-hand members are equipped with a nut 26, again with pin 27 lockings.On valve plate 9, be processed with the sealing plane 30 of ring, and on valve body 7, also have corresponding annular seal plane to work in coordination, guarantee that valve has excellent sealing performance, sealing surface on the valve plate can adopt alloyed steel, stainless steel, can whole process, also can be that the sealing surface 29 that processes valve body at valve plate built-up welding surfacing alloyed steel stainless steel can be that body is processed, and also can be that the method for hardfacing alloy and welding seat processes.

Rectifier plate 8 be offset to valve body 7 in the valve rod 4 of symmetry plane fixedly connected and the valve plate axle head and valve plate 9 spheres that are vertically fixed on the Rectifier plate are hinged, valve is under full-gear, the Rectifier plate valve plate is parallel with the media flow direction, the flow resistance coefficient minimum, valve plate 9 when valve closing, Rectifier plate 8 rotates with valve rod 4, behind angle＞70 that valve rod 4 turns over °, two sealing planes on valve plate 9 valve bodies become the contact of angle shape, before this, Rectifier plate 8 reduces the sectional area of throttle pipe circulation gradually, increase flow resistance, work to regulate flow, contact back valve plate rotates around the valve plate axle head under the situation that valve rod is rotated further, the sealing surface 30 of valve plate slides on valve body sealing surface 29, this moment, valve plate directly worked to regulate flow, two sealing surfaces 29 up to valve plate 8 valve bodies 7,30, on design attitude, overlap, valve is closed fully, at this moment act on external force on the valve rod 4 by Worm gear case, make and produce contact pressure between two sealing surfaces, form the initial sealing specific pressure, this contact pressure is owing to specially designed locking nut 1 on the Worm gear case, removed worm gear 31, essential between cog sideshake and the fit up gap of proper motion during worm screw 32 motions, after losing external force, understand the reverse between cog displacement and the existence all the time that produce, it can make valve non-leakage under lower pressure state, and equidirectional pressure medium can produce higher seal pressure between sealing surface.

Fig. 3 is the schematic representation of Worm gear case structure, the axle right-hand member of worm screw 20 is equipped with handwheel 25, worm gear 19 and worm screw 20 engagements, bearing 29,30 is housed on the worm shaft, with gland 18 bearing is compressed between the left and right sides gland 18 again, be fixed on above the overcoat 32 with bolt 31, the worm shaft left part also is equipped with locking nut 1, utilize it can adjusting threaded spindle between the gap.

During use, as want Open valve, at this moment locking nut 1 on the worm screw 31 of Worm gear case 2 can move in the direction of the clock earlier, rotate the handwheel 25 on the Worm gear case 2 more in a clockwise direction, so worm drive worm gear 32, actuate valve stem 4 again, Rectifier plate 8, valve shaft 10 is together done counterclockwise to rotate, make 10 swings of valve plate 9 winding board axles, also on the sealing surface of valve body 7, slide simultaneously, after two sealings disengage each other, valve plate 9 is along with valve shaft 10 rotates around valve rod 4 center lines together, till valve plate 9 turns over 90 ° of positions that reach standard-sized sheet, as want throttle down, can make valve rod 4 earlier by counterclockwise rotating handwheel 25, Rectifier plate 8, valve plate 9, valve shaft 10 together rotates around valve rod 4 center line clockwise directions, overlaps mutually again up to sealing surface, valve just is closed, and at this moment the locking nut 1 that should screw counterclockwise earlier on the spiral shell roller box 2 sheds the external force that is added on the handwheel again.

Claims

1, a kind of double-gate type rotary valve, it has valve body, valve rod, it is characterized in that Worm gear case (2) box flange is connected support (3) with support (3) upper flange with bolt (18), following end flange is fixedly connected on above the top neck portion flange of valve body (7) with bolt (19), valve rod (4) and Worm gear case (2), worm gear (32) connects with flat key (20), valve rod (4) is fixing with taper pin (21) with Rectifier plate (8), setscrew nut (18) is fixed under the valve body (7) on the neck endoporus concave surface with bolt (22), holding down bolt (14) is connected with setscrew nut (15), by two connecting sleeves of forming (13) holding down bolt (14) is connected with valve rod (4), valve body (7) is equipped with locking gasket (16) in the neck flange down, bottom (17) is fixed under the valve body (7) above the neck flange with bolt (23), and the Gland (5) that is used for compressing filler (6) is contained in valve rod (4) and valve body (7) is gone up between the neck flange.

2, rotary valve according to claim 1 is characterized in that valve plate (9) left end is a circular flat, and right-hand member is a conical surface, and central part has circular groove, the valve plate of packing in groove lid (4), and the inner chamber of valve plate lid (11) and the left end globulate of valve shaft (10) are hinged.

3, rotary valve according to claim 1 is characterized in that Rectifier plate (8) and valve rod (4) also are globular hinges.

4, rotary valve according to claim 1 is characterized in that annular seal plane (30) is arranged on the valve plate (9), and there is corresponding annular seal plane (29) valve body (7) top.