CN2077064U

CN2077064U - Fast shearing-off sluice valve

Info

Publication number: CN2077064U
Application number: CN 90216801
Authority: CN
Inventors: 潘挺宇; 陈煜良
Original assignee: EXPLOSION PROOF ELECTRIC EQUIP
Current assignee: EXPLOSION PROOF ELECTRIC EQUIP
Priority date: 1990-07-21
Filing date: 1990-07-21
Publication date: 1991-05-15

Abstract

The utility model discloses a fast shearing-off sluice valve, which is suitable for the emergency shearing-off and the releasing of the gas and liquid medium transport pipeline. The utility model can proceed with the air-operated control and the manual control of long distance program, which adopts a wedge type sluice valve component with double parallel or bisymmetry seal discs to replace an old type wedge flashboard; the fast shearing-off sluice valve is also provided with an automatic switching structure for the air-operation and the manual operation. The utility model has the advantages of high speed opening and close, good tightness, reasonable structure, low failure rate and long service life.

Description

Fast shearing-off sluice valve

The utility model is applicable to the emergency cut-off of gas-liquid medium transport pipeline or releases especially suitable far distance automatic program control about a kind of improvement design proposal of gate valve structure.

Existing gate valve is domestic production and the pneumatic Wedge gate valve that generally uses particularly, its angle of wedge is often less, generally just can carry out normal flashboard sealing and open and close operation at 8 °-10 °, when adopting the cylinder pneumatic mechanism to drive, because resistance is big between flashboard axis, making the interior inflation of cylinder start air pressure increases, maybe need increase the flashboard lifting surface area, the gate valve of general this mechanism can't move with single cylinder, can only inflate simultaneously with two cylinders and reach specified pressure and can open valve, obviously, its opening and closing time of the gate valve of this spline structure prolongs, and vibration is broken valve rod greatly easily during startup.

The purpose of this utility model is exactly will overcome the shortcoming that exists in the prior art and provide a kind of hoisting capacity little and gate valve that can fast opening and closing, and what make gate valve simultaneously manually realizes automatically conversion fast with pneumatic opening/closing mechanism.

This valve has valve body, valve gap, the wedge-type sealing mechanism that is connected with valve rod, seal assembling connecting piece between each member of valve rod opening/closing mechanism and gate valve, the wedge-type sealing mechanism adopts two seal discs parallel or two symmetries to cooperate with seal holder ring is movable, have two rise that piece is connected with seal disc and with the voussoir corresponding matching that connects with valve rod, its angle of wedge of this voussoir is between 18 ° to 24 °, voussoir and seal disc or/and the piece that rises flexibly connect, the Gate-valve sealing reliable performance of said structure, by the voussoir and the piece that rises thereof tiltedly split actuator make seal disc can with the valve seat tight seal, tiltedly split simultaneously the axial component of actuator increase the gate valve hoisting capacity is reduced can fast opening and closing.

The utility model design also further improves on the valve rod opening/closing mechanism, promptly between manual and pneumatic operator, be provided with automatically quick transformational structure, piston is connected with tooth bar and indication slide bar thereof with valve rod respectively, the gear engagement that is provided with in tooth bar and the manual pulley rotating shaft, the gear front end be provided with manual pulley clutch piston and place with cylinder on or/the piston die cavity that is communicated with following cavity, usually also be provided with attachment mechanism such as atmospheric valve and equilibrium valve in the cylinder, the setting of said structure is put and can be realized pneumatic easily and the manually-operable conversion at any state lower valve, the manually-operable of can meeting an urgent need when the cylinder pneumatic system breaks down is used, during pneumatic system energy proper functioning, the conversion that need not carry out operating device manually just can make remote pneumatic mechanism enter working state.

Further illustrate the utility model design proposal below in conjunction with description of drawings, provide embodiment simultaneously.

Fig. 1 is the utility model example structure view, and figure I, II are respectively partial enlarged view among Fig. 1.Wherein, 1. valve body, 2. cushion block, 3. seal holder ring, 4. seal disc; 5. piece, 6. wedge-shaped blocks, 7. guide plate, 8. gasket seal rise; 9. packing ring, 10. nut, 11. stud bolts, 12. valve gaps; 13. the filler seat ring, 14. packing rings, 15. nuts, 16. stud bolts; 17. valve rod, 18. pull bars, 19. flap bearings, 20; 22; 28; 32; 36; 37; 38. rubber seal; 21. piston, 23. packing rings, 24. attaching nuts, 25. screws; 26. tooth bar, 27. cylinder upper covers, 29. bearings, 30. screws; 31. handwheel clutch piston, 33. fixedly connected nuts, 34. indication slide bars, 35. protective caps; 39. bearing housing, 40. handwheels, 41. flat keys, 42. screws; 43. packing ring, 44. positioning rings, 45. pads, 46. cylinders; 47. Gland, 48. pin with holes, 49. pins, 50. swing bolts; 51. nut, 52. stuffing box packing, 53. pellets shot from a slingshot, 54. gears.

As shown in the figure, in the present embodiment, seal disc 4 is two parallel cylinders, each self-separation of each member and flexible connection in the gate valve wedge-type sealing mechanism, promptly also the Placement of seal disc 4 and the piece 5 that rises is set at flexible connection, such structure can make the gate valve still can reliable sealing with ease down to bottom line owing to the caused micro-deformation influence of temperature variation.Seal disc 4 is movably arranged on seal disc 4 can be rotated around its disk mandrel, valve is in opening-closing process, because of rising or descend, valve board assembly make liquid generation Bo Dong And that seal disc 4 is rotated, can be bonded to carry out automatically on the sealing surface to foreign material and clean, avoid a leakage factor.The utility model also can be made into high-temperature high pressure valve; seal disc 4 is designed to the unidirectional press mechanism that is subjected to; promptly on seal disc 4, be provided with the aperture that communicates with admission chamber; prevent because temperature raises and the unusual accident that raises and cause of valve pocket internal pressure; if when aperture position is located at seal disc 4 mandrel positions; can be provided with the movable sealing plug of pellet shot from a slingshot 53 mechanisms in the aperture easily; this spline structure is set and still can be satisfied in the NBS flashboard or stop valve leakage rate; be lower than 0.08% requirement; also be provided with wherein with the automatic transformational structure of manually-operable valve rod is pneumatic in this practical example; the indication slide bar 34 of fixedlying connected with tooth bar 26 seals with seal ring 36 at its protective cap 35 places; it is promptly practical simply again to cylinder 46 upper plenums and following cavity inflation respectively to control the gas path with the Electromagnetic Control case, in cylinder head 27; 19 with piston 21 places of becoming attached to be provided with the piston position signal recoverable capsule.But this signal recoverable capsule electric consumer upper stroke switch serves as, and connect with the air-powered electromagnetic control box and in control room or automatic control box, pneumatic channel to be closed automatically piston 21 travel position signal feed back, in addition, also can be by barometer or voltage regulating meter supervision are controlled.Fast 3 to 5 times of the domestic Pneumatic gate valve of the utility model structure cutting-off valve time ratio is applicable to that very pipeline needs the emergency cut-off occasion, and rational in infrastructure, fault is few, long service life.

Claims

1, a kind of fast shut-off gate valve, have between valve body, valve gap, valve rod, valve rod opening/closing mechanism and each member of gate valve and seal assembling connecting piece, it is characterized in that gate valve wedge-type sealing mechanism adopts two seal disc 4 and seal holder ring 3 activities parallel or two symmetries to cooperate, two voussoir 6 corresponding matching that rise that piece 5 is connected with seal disc 4 and connect with valve rod 17 should be arranged mutually, voussoir 6 angles of wedge between 18 ° to 24 °, voussoir 6 and seal disc 4 or/and piece 5 flexible connections of rising.

2, according to the described fast shut-off gate valve of claim 1, it is characterized in that: seal disc 4 flexibly connects with the piece 5 that rises.

3, according to the described fast shut-off gate valve of claim 2, it is characterized in that: seal disc 4 is set as two parallel cylinders, the disk mandrel rotation that can flexibly connect around itself and voussoir 6.

4, according to claim 1 or 2 or 3 described fast shut-off gate valves, it is characterized in that seal disc 4 is provided with the aperture that communicates with admission chamber, in the aperture or be provided with the movable sealing plug of pellet shot from a slingshot 53 mechanisms.

5, according to claim 1 or 2 or 3 described fast shut-off gate valves, it is characterized in that: be provided with automatic transformational structure between the pneumatic and manual-operating mechanism in the valve rod opening/closing mechanism, be that cylinder 46 inner carriers 21 are connected with tooth bar 26 and indication slide bar 34 thereof with valve rod 17 respectively, tooth bar 26 and 54 engagements of handwheel rotating shaft middle gear, gear 54 front ends be provided with handwheel clutch piston 31 and place with cylinder 46 on or/with the piston die cavity that following cavity is communicated with, be provided with atmospheric valve in the cylinder 46.

6, according to the described fast shut-off gate valve of claim 4, it is characterized in that: be provided with automatic transformational structure between the pneumatic and manual-operating mechanism in the valve rod opening/closing mechanism, be that cylinder 46 inner carriers 21 are connected with tooth bar 26 and indication slide bar 34 thereof with valve rod 17 respectively, tooth bar 26 and 54 engagements of handwheel rotating shaft middle gear, gear 54 front ends be provided with handwheel clutch piston 31 and place with cylinder 46 on or/with the piston die cavity that following cavity is communicated with, be provided with atmospheric valve in the cylinder 46.

7, according to claim 1 or 2 or 3 or 6 described fast shut-off gate valves, it is characterized in that: cylinder head 27,19 and piston 21 places of becoming attached to are provided with the position signal recoverable capsule of travel switch structure, and connect with the pneumatic control case.