CN102418797A

CN102418797A - High-performance aneroid/piston type ball valve

Info

Publication number: CN102418797A
Application number: CN2011101650215A
Authority: CN
Inventors: 白龙山
Original assignee: 白龙山
Current assignee: Zhejiang Yonglian Valve Co., Ltd.
Priority date: 2011-06-06
Filing date: 2011-06-06
Publication date: 2012-04-18
Anticipated expiration: 2031-06-06
Also published as: CN102418797B

Abstract

The invention discloses two 'high-performance aneroid/piston type ball valves', which belong to inventions and creations about ball valves and aim to solve the problems that hard and flexible sealing rings of the conventional mechanical 'O'-shaped or 'V'-shaped ball valve both produce over-high rotating torque in the opening and closing of the valve so as to seriously abrade a ball surface and a sealing ring particularly when the valve is frequently opened and closed to easily cause sealing failures and leakage, shorten service life of the valve and make the operation of the valve time-consuming and labor-consuming. In invention, a hydraulic transmission principle is developed for the first time, and two independent combined sealing rings are provided and are an 'aneroid-type sealing ring' and a 'piston-type sealing ring' respectively; in addition, a matched 'gear rack hydraulic device' is provided. An execution mechanism forms two different novel ball valve structures with the 'aneroid-type sealing ring' and the 'piston-type sealing ring' respectively, and the 90-degree rotation of the ball surface in the opening and closing of a ball body is free from friction, thereby improving sealing performance and simultaneously ensuring service life. A gap is formed between the ball surface and the sealing ring, thereby greatly decreasing the opening and closing torque of the ball body, making the operation labor-saving and making the closing reach a zero-leakage standard.

Description

High-performance bellows/piston type ball valve

High-performance bellows/piston type ball valve is the innovation and creation that belong to the ball valve aspect.Its task is to existing traditional mechanical formula " O " type or " V " type ball valve; In use hard, the soft seal circle all exists valve opening, it is excessive to close moment of rotation, especially to valve opening, when closing frequent movement, heavy wear appears in sphere and sealing ring material; Be prone to cause seal failure; Cause to leak, valve is short working life, and during operating cost, effort.Also there are many unfavorable factors in therefore existing ball valve in high temperature and heavy caliber applications, and its main cause is that traditional ball-valve structure is restricted, and has satisfied not the needs of high request or special occasions.

The present invention is the development and Application hydraulic transfering principle first, and two kinds of independent separately combined seal rings are provided, and a kind of is that " bellows-type seal ring " another kind is " a piston type seal ring "; A kind of supporting " gear rack hydraulic pressure installation " also is provided thus, and this actuator has formed two kinds of different ball valve structures with " bellows-type seal ring " or " piston type seal ring " respectively, and the former is low temperature, normal temperature occasion for its application; The latter is middle temperature, high temperature occasion, and it is not limited by nominal pressure and bore, in spheroid open and close 90 degree transfer processes; Seal ring and sphere have the gap all the time, do not produce the sassafras that rubs, when having only spheroid to forward closed position to; Seal ring is the obvolvent sphere; Formation zero leakage sealing, thus ball valve to open, close moment very little, operation saves time, laborsaving.It has thoroughly changed the performance of conventional ball valve, has fundamentally solved the drawback that ball valve exists.Simultaneously also prolong working life, thereby widened Applicable scope greatly.

As rotating shaft, the lower valve rod double-screw bolt is as positioning shaft with upper valve rod in the present invention, and Fang Xin is bonded into one in outer Fang Xin of upper valve rod and the spheroid.Adopt half sectional view one cover " bellows-type seal ring " to be set in addition in the valve body left side; The right side is provided with a cover " piston type seal ring "; Two cover ring structures are different, can use to various occasions, and (half sectional view becomes whole-cutaway view) cover " bellows-type seal ring " becomes two covers in use; Be separately positioned on the valve body both sides, be symmetrically distributed.Another set of " piston type seal ring " also becomes two covers, is separately positioned on the valve body both sides, is symmetrically distributed.That is: the identical in twos seal ring of quadruplet has been formed " high-performance bellows ball valve " or " high-performance piston type ball valve " respectively.Two kinds of ball valves all are provided with movable valve seat and seal ring in the valve body both sides, and it leans on bellows or piston to promote, and its bellows carries out roll welding by metal " U " shape diaphragm and doughnut-shaped steel plate; " U " shape mouth is shut, formed bellows, cooperate by two-pad again; Together be placed in the middle of the flange, pushed down sealing, make the bellows pressurize by flange; Hydraulic oil gets into the bellows chamber through bellows valve body silk hole, act on the soft seal valve seat soft seal circle pressurized and sphere is formed sealing." bellows-type seal ring ball valve " is on the inwall of valve body both sides in addition; Also be provided with dividing plate, have outside thread and valve body internal thread to be bonded into one on the dividing plate, when damaging for the soft seal loop material; Promptly inject the usefulness of sealing compound through plug, so ball valve has obtained temporary sealing guarantee." piston type seal ring ball valve " respectively is provided with movable valve seat and the seal ring except that the valve body both sides are the same; Also be provided with pallet push rod and piston push rod; And filler, stuffing nut lid, cylinder bracket and fastening screw trip bolt, wherein fastening screw trip bolt becomes 120 to spend cylinder bracket with oil cylinder; Be uniformly distributed with and be fixed on the piston valve body side, control the action of hard seal ring and sphere clutch type.

The present invention is provided with a pair of radial bearing and is used for locating about upper valve rod and turns round in the flange hole in valve body, filler seat top also is provided with support and is used for fixing actuator and thrust-bearing simultaneously, makes the vertical location of upper valve rod not produce mobile.The lower valve rod double-screw bolt is by the locking of flange gland, and its top is again by a pair of radial bearing in the mesopore of spheroid lower end and top thrust-bearing control location.Therefore through location, spheroid is fixed firmly, and rotated around upper and lower axle to above 2 axles.Meanwhile be provided with again on support top by supporting " gear rack hydraulic pressure installation ", this actuator adopts gear, tooth bar and screw rod, piston, oil cylinder to form " gear rack hydraulic pressure installation ", during use; Apply screw rod power with handwheel, tooth bar drives output gear, drives upper valve rod and rotates; Cause spheroid open and close 90 degree conversions; This moment, piston was synchronized with the movement thereupon, with the hydraulic oil release of cylinder chamber or boost, with the requirement of satisfying valve opening or closing.Therefore it has realized that with two kinds of supporting uses of ball valve seal ring does not have friction, and the valve moment of rotation is very little, and is easy to operate, very laborsaving, and this valve long service life, closes to reach the zero leakage index.

Compact structure of the present invention, novelty, not only high temperature resistant but also low temperature resistant, and pressure difference restriction, good seal performance, using scope is wide, is the ball valve at present desirable epoch of striding.

Figure of description 1 is structure master's sectional view of the present invention.Among the figure: 1. valve body; 2. plug; 3. dividing plate; 4. doughnut-shaped steel plate; 5. soft seal circle; 6. bellows valve body; 7. spheroid; 8. soft seal valve seat; 9.U shape diaphragm; 10. two-pad; 11. upper valve rod; 12. filler seat; 13. support; 14,41. thrust-bearings; 15. gland nut; 16. secondary tooth bar; 17. positioning wheel; 18. positioning shaft; 19. main tooth bar screw rod; 20. cover plate; 21. output gear; 22,33,42. radial bearings; 23. stop screw; 24. oil pipe; 25. housing; 26,28,31,40. double-screw bolts; 27,29,32,39. nuts; 30. filler; 34. hard seal valve seat; 35. piston push rod; 36. pallet push rod; 37. piston valve body; 38. hard seal ring; 43. lower valve rod double-screw bolt; 44 flange glands.

Fig. 2 is the partial enlarged drawing of I among Fig. 1.Among the figure: 16. secondary tooth bars; 17. positioning wheel; 18. positioning shaft; 19. main tooth bar screw rod; 20. cover plate; 21. output gear; 22. radial bearing; 23. stop screw; 25. housing; 11. upper valve rod; 26. double-screw bolt; 27. nut; 14. thrust-bearing; 15. gland nut; 13. support.

Fig. 3 is the sectional view of A-A among Fig. 1.Among the figure: 45. screw rod guard shields; 46. handwheel; 47. bearing gland; 48. rack bar nut; 19. main tooth bar screw rod; 49. pipe connects; 16. secondary tooth bar; 17. positioning wheel; 18. positioning shaft; 25. housing; 50. cylinder bottom plate; 51. piston; 52. plug; 53. oil pressure interface; 54.O shape seal ring; 55. oil cylinder; 23. stop screw; 11. upper valve rod; 21. output gear; 56. stage clip 57. back-up rings 58. thrust-bearings.

Fig. 4 is the partial enlarged drawing of II among Fig. 1.Among the figure: 8. soft seal valve seat; 9.U shape diaphragm; 59. oil pressure interface 10. two-pads 4. doughnut-shaped steel plates 1. valve bodies; 2. plug; 3. dividing plate; 7. spheroid; 5. soft seal circle.

Fig. 5 is the partial enlarged drawing of III among Fig. 1.Among the figure: 38. hard seal rings; 7. spheroid; 34. hard seal valve seat 1. valve bodies 37. piston valve bodies 60. fastening screw trip bolts 61. oil cylinders; 62. oil pressure interface; 35. piston push rod 63. bellowss; 64. cylinder bracket 65. stuffing nuts lid; 66. filler; 36. pallet push rod.

Annotate: 1. bellows-type seal ring: bellows is shut the U-shaped mouth through roll welding by U-shaped diaphragm 9 and doughnut-shaped steel plate 4, forms withstand voltage bellows.Wherein doughnut-shaped steel plate 4 inside are provided with the oil circuit through hole, and it communicates with oil pressure interface 59.Stud with soft seal circle 5 on the soft seal valve seat 8 in addition, it constitutes one, and with bellows component film cartridge seal circle.Shown in accompanying drawing 1 and accompanying drawing 4.

2. piston type seal ring: by hard seal valve seat 34; Piston push rod 35; Pallet push rod 36; Hard seal ring 38, and compositions such as oil cylinder 61 and cylinder bracket 64.Stud with hard seal ring 38 on the wherein hard seal valve seat 34, it also constitutes one, and forms the piston type seal ring with above-mentioned parts.Shown in accompanying drawing 1 and accompanying drawing 5.

3. gear rack hydraulic pressure installation: plan view is by secondary tooth bar 16; Positioning wheel 17; Positioning shaft 18; Main tooth bar screw rod 19; Cover plate 20; Output gear 21; Radial bearing 22; Stop screw 23; Housing 25 compositions such as grade.Shown in accompanying drawing 1.Plan view back plan view is by cylinder bottom plate 50; Piston 51; Plug 52; Oil pressure interface 53; O-ring seals 54; Oil cylinder 55 compositions such as grade.Shown in accompanying drawing 3.The plan view front plan view is by stage clip 56; Back-up ring 57; Thrust-bearing 58; Screw rod guard shield 45; Handwheel 46; Bearing gland 47; Rack bar nut 48; Main tooth bar screw rod 19; Pipe connects 49 compositions such as grade.Shown in accompanying drawing 3.Wherein secondary tooth bar 16 center lines are provided with through hole, and it is enclosed within on the main tooth bar screw rod 19, are slidingly matched with it, and guide main tooth bar and output gear 21 engagements, and gear, tooth bar movement clearance are controlled by positioning wheel 17 simultaneously.Output gear 21 is fixing up and down by a pair of radial bearing 22, and inner Fang Xin and valve rod foreign side core are bonded into one when it rotates, and drives valve rod and rotates synchronously.

Below in conjunction with accompanying drawing embodiments of the invention are explained its working principle.

One. the bellows-type seal ring ball valve

1. during valve opening:

Rotate counterclockwise handwheel 46, main tooth bar screw rod 19 is moved down, this moment, stage clip 56 loosened gradually; Secondary tooth bar 16 keeps original position, and the hydraulic oil of bellows chamber returns cylinder chamber rapidly simultaneously, and U-shaped diaphragm 9 begins to shrink; Soft seal valve seat 8 is relaxed withdrawal; Soft seal circle 5 is thrown off with sphere then, and the tooth bar on the main thereupon tooth bar screw rod 19 puts in place (main tooth bar lower end surface contacts with secondary tooth bar 16 upper-end surfaces) with output gear 21 engagements, and so far secondary tooth bar 16 also begins to move down; Output gear 21 forwards spheroid 7 to 90 degree by 0 degree simultaneously, causes valve opening.

2. during valve closing:

Clockwise rotate handwheel 46, main tooth bar screw rod 19 is moved up, forward output gear 21 to 0 when spending from 90 degree, stuck by stop screw 23; Secondary tooth bar 16 stops to move up simultaneously, continues to move up so main tooth bar screw rod 19 is thrown off secondary tooth bar 16, promotes piston 51 the hydraulic oil output of cylinder chamber is boosted; Be delivered to the bellows chamber through oil pipe 24, act on the U-shaped diaphragm 9, soft seal valve seat 8 pressurizeds are by distending; Soft seal circle 5 is closely contacted with sphere, form sealing, valve can be closed.

Two. the piston type seal ring ball valve

1. during valve opening:

Rotate counterclockwise handwheel 46, main tooth bar screw rod 19 is moved down, this moment, stage clip 56 loosened gradually; Secondary tooth bar 16 keeps original position, and the hydraulic oil of the piston cylinder chamber on the piston valve body 37 returns cylinder chamber rapidly simultaneously, and piston push rod 35 is retracted with pallet push rod 36; So hard seal valve seat 34 loses the pressure effect; Then hard seal ring 38 is thrown off sphere, and tooth bar on the main thereupon tooth bar screw rod 19 and output gear 21 engagements put in place, and make secondary tooth bar 16 also begin to move down; Output gear 21 forwards spheroid 7 to 90 degree by 0 degree simultaneously, causes valve opening.

2. during valve closing:

Clockwise rotate handwheel 46, main tooth bar screw rod 19 is moved up, forward output gear 21 to 0 when spending from 90 degree; Stuck by stop screw, secondary tooth bar 16 stops to move up simultaneously, continues to move up so main tooth bar screw rod 19 is thrown off secondary tooth bar 16; Promote piston 51, the hydraulic oil output of cylinder chamber is boosted, be delivered to the piston cylinder chamber on the piston valve body 37 through oil pipe 24; Act on 3 pistons that are uniformly distributed with, piston push rod 35 is urged into pallet push rod 36 pressurizeds, and hard seal ring 38 is closely contacted with sphere; Form sealing, valve can be closed.

The present invention's " high-performance bellows/piston type ball valve " is to the change of conventional ball valve matter and tremendous lifting, these two kinds of ball valves, outstanding problem such as it is excessive thoroughly to have solved the ball valve moment of torsion, and sealing life is short.It will become the leading products of following valve industry, particularly long-distance transport pipes is used valve, and meaning is very great, and its market prospects are good, and are widely applicable, is the forward-looking novel product in the epoch of striding.

Claims

1. two kinds of high-performance bellows/piston type ball valves mainly comprise valve body (1); Plug (2), (52); Dividing plate (3); Doughnut-shaped steel plate (4); Soft seal circle (5); Bellows valve body (6); Spheroid (7); Soft seal valve seat (8); U-shaped diaphragm (9); Two-pad (10); Upper valve rod (11); Filler seat (12); Support (13); Thrust-bearing (14), (41), (58); Gland nut (15); Secondary tooth bar (16); Positioning wheel (17); Positioning shaft (18); Main tooth bar screw rod (19); Output gear (21); Radial bearing (22), (33), (42); Stop screw (23); Oil pipe (24); Housing (25); Hard seal valve seat (34); Piston push rod (35); Pallet push rod (36); Piston valve body (37); Hard seal ring (38); Lower valve rod double-screw bolt (43); Flange gland (44); Screw rod guard shield (45); Handwheel (46); Bearing gland (47); Rack bar nut (48); Pipe connects (49); Cylinder bottom plate (50); Piston (51); Oil cylinder (55); Stage clip (56); Oil pressure interface (59); Cylinder bracket (64); Stuffing nut lid (65); Filler (66); Deng composition, it is characterized in that: valve body (1) both sides are provided with two covers separately independently " bellows-type seal ring " or " piston type seal ring ", on valve body (1), also are provided with supporting actuator " gear rack hydraulic pressure installation "; It has formed two kinds of different ball valve structures with " bellows-type seal ring " or " piston type seal ring "; Under the driving of " gear rack hydraulic pressure installation ", adopt the work of hydraulic pressure transfer and moment output substep, control " bellows-type seal ring ball valve " or " piston type seal ring ball valve " simultaneously; Make it constitute the clutch type sealing; Realize heatproof of the present invention, withstand voltage, moment of rotation is very little, the valve closing zero leakage.

2. two kinds of high-performance bellows/piston type ball valves as claimed in claim 1 is characterized in that: valve body (1) both sides respectively are provided with bellows valve body (6), between their flanges; Be provided with U-shaped diaphragm (9) and doughnut-shaped steel plate (4), it adopts roll welding that two parts are formed one, forms bellows; And cooperate by two-pad (10); Pushed down sealing by flange, doughnut-shaped steel plate (4) inside is provided with the oil circuit through hole in addition, and it communicates with oil pressure interface (59).

3. two kinds of high-performance bellows/piston type ball valves as claimed in claim 1; It is characterized in that: spheroid (7) both sides are respectively equipped with the movable valve seat of quadruplet; Wherein two covers are soft seal valve seat (8), and a separate set of is hard seal valve seat (34), and per two cover valve seats stud with soft seal circle (5) and hard seal ring (38) respectively; According to the occasion requirement, moderate selection is hard, soft seal circle ball valve during use.

4. two kinds of high-performance bellows/piston type ball valves as claimed in claim 1 is characterized in that: respectively be provided with 1 on the inwall of valve body (1) both sides and have the dividing plate (3) that is threaded, it be located at valve body (1) both sides plugs (2) and constitute urgent injecting sealant system.

5. two kinds of high-performance bellows/piston type ball valves as claimed in claim 1; It is characterized in that: valve body (1) both sides respectively are provided with piston valve body (37); Its side is provided with 3 piston cylinder and the accessory cylinder brackets (64) that become 120 degree to distribute, piston push rod (35) and pallet push rod (36), and wherein pallet push rod (36) also is provided with filler (66) and stuffing nut lid (65) on piston valve body (37); Make it pallet push rod (36) and form sealing, guarantee that medium does not have leakage.

6. two kinds of high-performance bellows/piston type ball valves as claimed in claim 1 is characterized in that: be provided with output gear (21) in " gear rack hydraulic pressure installation " housing (25); Secondary tooth bar (16); Main tooth bar screw rod (19); Positioning wheel (17); Positioning shaft (18); Radial bearing (22) and stage clip (56) also are provided with through hole on wherein secondary tooth bar (16) center line, and it is enclosed within on the main tooth bar screw rod (19), by stage clip (56) and positioning wheel (17) control, guide main tooth bar and output gear (21) engagement.

7. two kinds of high-performance bellows/piston type ball valves as claimed in claim 1 is characterized in that: " gear rack hydraulic pressure installation " housing (25) front is provided with pipe and connects (49); Rack bar nut (48); Thrust-bearing (58); Bearing gland (47); Handwheel (46) and screw rod guard shield (45), wherein main tooth bar screw rod (19) top is provided with tooth bar, and the middle part is provided with circular pin, and the bottom is provided with trapezoidal screw, and it cooperates with rack bar nut (48), then constitutes the extending means of main tooth bar screw rod (19).

8. two kinds of high-performance bellows/piston type ball valves as claimed in claim 1 is characterized in that: " gear rack hydraulic pressure installation " housing (25) back is provided with cylinder bottom plate (50); Piston (51); Plug (52) and oil cylinder (55) and oil pipe (24) wherein on the cylinder bottom plate (50), also are provided with outside thread and oil cylinder (55) internal thread and are bonded into one, again by screw on housing (25) side, therefore just constituted the hydraulic power of hydraulic oil output.

9. two kinds of high-performance bellows/piston type ball valves as claimed in claim 1; It is characterized in that: valve body (1) bottom is provided with lower valve rod double-screw bolt (43) and flange gland (44); Wherein flange gland (44) upper-end surface also is provided with protruding symmetrical flat post; It and lower valve rod double-screw bolt (43) lower end fillistered joint merge locking, and lower valve rod double-screw bolt (43) top also is provided with thrust-bearing (41) and radial bearing (42) in addition, and locate and rotate lubricated usefulness for spheroid (7) provides.

10. two kinds of high-performance bellows/piston type ball valves as claimed in claim 1 is characterized in that: valve body (1) top is provided with upper valve rod (11); Radial bearing (33); Filler seat (12); Support (13); Thrust-bearing (14); Gland nut (15), wherein 2 radial bearings (33) and 1 thrust-bearing (14) with upper valve rod (11) location, rotate it and lubricate freely.