CN202545840U - Containment vessel isolation butterfly valve - Google Patents
Containment vessel isolation butterfly valve Download PDFInfo
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- CN202545840U CN202545840U CN2012201687506U CN201220168750U CN202545840U CN 202545840 U CN202545840 U CN 202545840U CN 2012201687506 U CN2012201687506 U CN 2012201687506U CN 201220168750 U CN201220168750 U CN 201220168750U CN 202545840 U CN202545840 U CN 202545840U
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Abstract
The utility model relates to a containment vessel isolation butterfly valve. The containment vessel isolation butterfly valve comprises a hand gear and a valve body, wherein the hand gear comprises a cushion cylinder, an energy storage cam mechanism, a rocker mechanism and a transmission mechanism, wherein the energy storage cam mechanism comprises a cam box body, a fusiform cam, a guide sleeve, a slider body, a slider base and a combined disc spring; the transmission mechanism comprises a brake disc, a ladder-shaped nut, a bearing I, an electromagnetic clutch, a screw, a lock nut, a bearing II, a bearing base, a combined worm wheel, a worm and a worm box body; a valve neck connected with the hand gear is arranged on the valve body, a sealing sleeve and the bearing base are arranged in the valve body, an upper valve rod is connected with a butterfly board through a butterfly spring assembly which is arranged in an upper connecting piece, a bush fixed by the upper connecting piece is matched and connected with a block drawing key which is arranged on the upper valve rod, a knuckle bearing is arranged between a lower valve rod and the valve body, and a limit with 90 degrees rotation is arranged between the lower valve rod and an end cover. The containment vessel isolation butterfly valve has beneficial effects of long service life, simpleness in operation, reliability in movement, and capability of being rapidly closed and preventing the sealing surface from being impacted.
Description
Technical field
The utility model relates to a kind of safe shell insulated butterfly valve, especially a kind of safe shell insulated butterfly valve that is used for pressurized-water reactor nuclear power plant executive system Safety function.
Background technique
Use the safe shell insulated butterfly valve at pressurized-water reactor nuclear power plant at present, its drive unit adopts Electric actuator, and the shut-in time can not be satisfied the requirement of system process, and the valve body of three eccentric structures can not satisfy the nuclear power station requirement in working life.
The model utility content
The purpose of the utility model just is to provide a kind of safe shell insulated butterfly valve, and it has overcome traditional deficiency that the safe shell insulated butterfly valve shut-in time is long, working life is short, rate of fault is high.
For realizing above-mentioned purpose, the utility model adopts as follows
Technological scheme:
A kind of safe shell insulated butterfly valve of the utility model comprises manual operating device and the valve body that is fixedly connected with manual operating device; Said manual operating device comprises bounce cylinder and slotted link mechanism; Said valve body comprises valve body, valve seat, upper valve rod, upper connector, butterfly plate, lower valve rod, following link, end cap, seal ring, pressure ring, it is characterized in that:
(1) between the bounce cylinder of said manual operating device and slotted link mechanism, an energy storage cam mechanism is set, said energy storage cam mechanism is made up of cam box, fusiformis cam, guide sleeve, slide body, slider seat, combination dish spring, and cam box is fixedly connected under the bounce cylinder; Establish cylindrical cavity in cam box one end, establish guide sleeve in the cavity, circular hole is provided with the fusiformis cam in guide sleeve; Assembly dish spring outside the guide sleeve cylinder, the large scale end face center of fusiformis cam is connected with the piston rod of bounce cylinder, and keeps with one heart; Bottom in cam box is equipped with external frame for circular slider seat, is provided with endoporus in slider seat central authorities, is provided with at least three at slider seat towards the end face that makes up the dish spring and is the equally distributed high outside and low outside convexity of radioactivity; Each crowning is set to be the concave surface of circular arc to the internal surface of fusiformis cam; And on the circular arc concave surface, offer arc groove again with the protrusion center line symmetry, two inner side surfaces of arc groove and convex center line parallel, each arc groove is identical along circular arc concave surface depth dimensions; In each arc groove, be respectively fitted with slide body; Slide body is made up of slide block and roller that is assemblied in the slide block two ends one and roller two, and slide block embeds the arc groove that slider seat is offered, and in the arc groove under the slide block, is provided with the combination needle bearing; Slide block can slide along the arc direction of arc groove on the slider seat; Roller one contacts with the lower end surface of combination dish spring, and roller two contacts with the fusiformis cam face, is connected with cover plate in the lower end of cam box; The cover plate opposite side is connected with the rocking bar casing of slotted link mechanism, and the rocking bar casing the other end is provided with positioning disk.
Be connected with driving mechanism in the slotted link mechanism bottom; Said driving mechanism comprises brake disc, trapezoidal nut, bearing one, magnetic clutch, screw rod, locking nut, bearing two, bearing support, combination worm gear, worm screw, worm screw casing; Trapezoidal nut is erected in the positioning disk through bearing one; The cylinder of trapezoidal nut is equipped with magnetic clutch, bearing two, bearing support outward successively; And lock with locking nut; Is connected with fusiformis cam small size end face center with endoporus that the screw rod of trapezoidal nut engagement passes slotted link mechanism and slider seat central authorities and keeps concentric, the end face tooth of bearing support end face setting and the end face tooth that makes up worm gear mesh, and the worm screw casing is fixedly connected with the rocking bar casing; Connecting rod rest in the slotted link mechanism is fixed on the screw rod.
(2) said valve body is provided with the flanged (FLGD) valve neck in two ends; Valve neck on the valve body is fixedly connected with the rocking bar casing of slotted link mechanism in the manual operating device; And in the valve neck, be equipped with stuffing box gland and bearing support, the delivery outlet that the crotch rocking bar in the slotted link mechanism in valve neck and the manual operating device is passed in the upper end of upper valve rod is connected;
On the upper valve rod of valve body, be provided with a shifting block key; On upper connector, be provided with a lining; The keyway of shifting block key and lining inwall is connected, and the dished spring assembly that in upper connector, is provided with links together upper valve rod and butterfly plate, and dished spring assembly is made up of dish spring, guide rod, stop pin, bolt, shaft coupling; The circular hole that bolt passes shaft coupling and upper valve rod underpart is connected with guide rod, and the stop pin two ends connect guide rod and butterfly plate respectively;
Between lower valve rod and valve body, be provided with joint shaft bearing, be provided with between lower valve rod and the end cap 90 ° rotating spacing.
The quantity of arc groove that is provided with on the slider seat in the manual operating device described in the utility model and respective slide body also can be three, four or six.Be arranged on the butterfly plate elastic metallic composite sealing ring that the seal ring that forms sealing pair with valve seat adopts afterbody band annulus in the said valve body.The pressure ring of fixed seal ring is set to that arc length equates in the said valve body three sections.
The beneficial effect of the utility model is: manual operating device is that an energy storage cam mechanism is set between the bounce cylinder of existing technology and slotted link mechanism, and connects a driving mechanism in the slotted link mechanism end.The operation manually of the worm screw input end through driving mechanism realizes energy storage cam mechanism storage of potential energy and opens valve simultaneously; Can realize the quick closedown of valve getting electricity condition through the dead electricity of magnetic clutch in the driving mechanism,, can realize closing of valve normal speed through the handwheel on the drive transmission device worm screw at magnetic clutch.Compressing and the running orbit that unclamps the employing approximate straight line motion of seal ring in the valve body and valve seat overcome the deficiency of existing technology three eccentric structures, avoided the friction on sealing pair surface.The utility model is used for the safe shell insulated butterfly valve of containment when core loading or reactor building maintenance operation, in case loading and unloading accident occurs, magnetic clutch dead electricity, valve quick closedown in 3 seconds, more convenient operation; The friction on sealing pair surface has been avoided in compressing and unclamping the running orbit that adopts approximate straight line motion of seal ring in the valve body and valve seat, has prolonged the working life of valve, seals more reliably, uses safer.
Description of drawings
Fig. 1 is the utility model safe shell insulated butterfly valve embodiment's a structural representation;
Fig. 2 is the structural representation of A-A section among the utility model embodiment Fig. 1;
Fig. 3 is turn clockwise 90 ° a structural representation of B-B section among the utility model embodiment Fig. 1;
Fig. 4 is the structural representation of C-C section among the utility model embodiment Fig. 3;
Fig. 5 is the structural representation of D-D section among the utility model embodiment Fig. 3;
Fig. 6 is the schematic diagram of movements that butterfly plate is closed 90 ° of scope shifting block keys and lining among the utility model embodiment Fig. 2;
Fig. 7 is the schematic diagram of movements of shifting block key and lining when butterfly plate is pressed to valve seat among the utility model embodiment Fig. 2;
Fig. 8 is the local structure for amplifying schematic representation in I place among the utility model embodiment Fig. 2;
Among the figure: 1. manual operating device; 2. valve body; 3. piston; 4. damping hole; 5. piston rod; 6. fusiformis cam; 7. guide sleeve; 8. cam box; 9. make up the dish spring; 10. roller one; 11. slide block; 12. roller two; 13. extension spring; 14. slider seat; 15. cover plate; 16. rocking bar casing; 17. connecting rod rest; 18. connecting rod; 19. screw rod; 20. crotch rocking bar; 21. positioning disk; 22. bearing one; 23. brake disc; 24. trapezoidal nut; 25. magnetic clutch; 26. bearing two; 27. bearing support; 28. locking nut; 29. combination worm gear; 30. worm screw; 31. worm screw casing; 32. upper valve rod; 33. valve neck; 34. stuffing box gland; 35. bearing support; 36. lining; 37. shifting block key; 38. valve body; 39. valve seat; 40. shaft coupling; 41. bolt; 42. upper connector; 43. dish spring; 44. guide rod; 45. stop pin; 46. butterfly plate; 47. following link; 48. lower valve rod; 49. pressure ring; 50. packing ring; 51. seal ring; 52. joint shaft bearing; 53. end cap.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further explain:
Shown in Fig. 1-8, the utility model embodiment safe shell insulated butterfly valve comprises manual operating device 1 and valve body 2.
Manual operating device 1 is made up of bounce cylinder, energy storage cam mechanism, slotted link mechanism and driving mechanism, and an energy storage cam mechanism specifically is set between bounce cylinder and slotted link mechanism, and the energy storage cam mechanism is made up of cam box 8, fusiformis cam 6, guide sleeve 7, slide body, slider seat 14, combination dish spring 9; Establish cylindrical cavity in cam box 8 one ends that are fixedly connected with bounce cylinder, establish guide sleeve 7 in the cylindrical cavity, circular hole is provided with fusiformis cam 6 in guide sleeve 7; Assembly dish spring 9 outside guide sleeve 7 cylinders, the large scale end face center of fusiformis cam 6 is connected with the piston rod 5 of bounce cylinder, and keeps with one heart; Bottom in cam box 8 is equipped with external frame for circular slider seat 14, is provided with endoporus in slider seat 14 central authorities, and slider seat 14 is provided with the high outside and low outside convexity that five radioactivity are uniformly distributed with towards the end face of combination dish spring 9; The external frame of five convexities is identical with slider seat 14 external frames; Protruding bi-side are parallel, and crowning is the circular arc concave surface to the internal surface of fusiformis cam 6, offer the arc groove with the protrusion center line symmetry respectively at the circular arc concave surface; Two inner side surfaces of arc groove and convex center line parallel; Arc groove is identical along circular arc concave surface depth dimensions, in each arc groove, is respectively fitted with slide body, and slide body is made up of slide block 11 and roller that is assemblied in slide block 11 two ends 1 and roller 2 12; Slide block 11 embeds the arc groove that slider seat 14 is offered; Side in slide block 11 and slider seat 14 raisings connects with extension spring 13, is provided with the combination needle bearing in the arc groove under slide block 11, and slide block 11 can slide along the arc direction of arc groove on the slider seat 14; The roller 1 that is connected with slide block 11 1 ends contacts with combination dish spring 9 end faces; The roller 2 12 that is connected with slide block 11 the other ends contacts with fusiformis cam 6 surfaces, and the large scale end face of cam box 8 is connected with cover plate 15, and cover plate 15 opposite sides are connected with the rocking bar casing 16 of slotted link mechanism; Rocking bar casing 16 the other ends are provided with positioning disk 21, and are connected with driving mechanism; Driving mechanism is made up of brake disc 23, trapezoidal nut 24, bearing 1, magnetic clutch 25, screw rod 19, locking nut 28, bearing 2 26, bearing support 27, combination worm gear 29, worm screw 30, worm screw casing 31; Trapezoidal nut 24 is erected in the positioning disk 21 through bearing 1; The cylinder of trapezoidal nut 24 is equipped with magnetic clutch 25, bearing 2 26, bearing support 27 outward successively; And with locking nut 28 lockings; Passing slotted link mechanism with the screw rod 19 of trapezoidal nut 24 engagement is connected with fusiformis cam 6 small size end face centers with slider seat 14 central endoporus and keeps concentric; The end face tooth that bearing support 27 end faces are provided with meshes with the end face tooth of combination worm gear 29, and worm screw casing 31 is fixedly connected with rocking bar casing 16; The slotted link mechanism that between energy storage cam mechanism and driving mechanism, is provided with mainly is made up of connecting rod rest 17, connecting rod 18 and crotch rocking bar 20; Connecting rod rest 17 is fixedly connected with screw rod 19; Symmetrically arranged outrigger shaft is hinged with an end of connecting rod 18 respectively on the connecting rod rest 17; The other end of connecting rod 18 is hinged with the symmetrical outrigger shaft of crotch rocking bar 20 respectively, and the delivery outlet that crotch rocking bar 20 is provided with finally is connected with upper valve rod 32 input ends of valve body 2.
Valve body 2 is made up of valve body 38, valve seat 39, upper valve rod 32, upper connector 42, butterfly plate 46, lower valve rod 48, following link 47, end cap 53, seal ring 51, pressure ring 49; The flanged (FLGD) valve neck 33 in two ends that is connected with manual operating device 1 is set on the valve body 2, establishes stuffing box gland 34 and bearing support 35 in the valve neck 33, stuffing box gland 34 is provided with rubber seal, and bearing support 35 inwalls are provided with needle bearing; At upper valve rod 32 a shifting block key 37 is set; On upper connector 42, connect a lining 36; Shifting block key 37 is connected with the keyway of lining 36 inwalls, and the dished spring assembly that is provided with in the upper connector 42 links together upper valve rod 32 and butterfly plate 46, and dished spring assembly is made up of dish spring 43, guide rod 44, stop pin 45, bolt 41, shaft coupling 40; The circular hole that bolt 41 passes shaft coupling 40 and upper valve rod 32 ends is connected with guide rod 44, and stop pin 45 two ends connect guide rod 44 and butterfly plate 46 respectively; Be provided with joint shaft bearing 52 between lower valve rod 48 and the valve body 38; Be provided with between lower valve rod 48 and the end cap 53 90 ° rotating spacing; Be arranged on the butterfly plate 46 the elastic metallic composite sealing ring that the seal ring 51 that forms sealing pairs with valve seat 39 adopts afterbody band annulus, be provided with packing ring 50 between seal ring 51 and the butterfly plate 46, the pressure ring 49 of fixed seal ring 51 is set to equal three sections of arc length.
Operating principle:As shown in Figure 3; When valve need be opened in the complete shut-down position, magnetic clutch 25 the castellated flank engagement after electric, through the handwheel on the manual driven worm screw 30; Drive trapezoidal nut 24 rotations through worm screw 30, combination worm gear 29, bearing support 27, magnetic clutch 25; Dish 21 can not axially move with the spacing of locking nut 28 because trapezoidal nut 24 is positioned, and with the screw rod 19 compelled downward straight line motions of trapezoidal nut 24 engagements, the fusiformis cam 6 that connects with screw rod 19 drives piston 3 downward straight line motions; Roller 2 12 rolls along fusiformis cam 6 surfaces of moving linearly; Promote the groove slip of slide block 11 along slider seat 14, promote roller one 10 extruding combination dish springs 9 simultaneously, combination dish spring 9 is compressed energy storage in the overall process of valve open; During the downward straight line motion of the screw rod that is connected with fusiformis cam 6 19, drivening rod frame 17 is through connecting rod 18 transmissions, makes that crotch rocking bar 20 is compelled does partly rotation motion, and valve open puts in place the most at last.
When the accident conditions valve needs quick closedown; Magnetic clutch 25 dead electricity of driving mechanism, the castellated flank of tooth of magnetic clutch 25 separates, and the trapezoidal nut 24 that is connected with magnetic clutch 25 possesses the condition that rotates freely; Compressed combination dish spring 9 discharges potential energy fast; Promote fusiformis cam 6 quick upwards straight line motions through slide body, the piston 3 that drives bounce cylinder moves upward fast, owing to be provided with the damping hole 4 that is communicated with piston 3 both sides at piston rod 5 ends; The latter end stroke of 4 pairs of valve closings of damping hole plays buffer function, and fusiformis cam 6 drives worm screw 19 is realized valve through the slotted link mechanism transmission quick closedown simultaneously.
As shown in Figure 6; When with handwheel or through magnetic clutch 25 dead electricity throttle downs; The shifting block key 37 that is provided with on the upper valve rod 32 is stirred lining 36, and 90 ° that drive upper connector 42 and dished spring assembly completion butterfly plate 46 rotatablely move, and this moment, lower valve rod 48 was spacing by end cap 53; As shown in Figure 7; When rotating upper valve rod 32 again; Can only do eccentric motion with respect to upper valve rod 32 after the lining that cooperates with shifting block key 37 36 is limited, the lining 36 of makeing eccentric motion drives upper connectors 42 makes butterfly plate 46 press to valve seat 39, realizes the sealing of valve; Because butterfly plate 46 is done near linear when closing and moved and press to valve seat 39, the frictionless sealing pair has prolonged the working life of valve; The near linear that the joint shaft bearing 52 that is provided with between lower valve rod 48 and the valve body 38 is beneficial to butterfly plate 46 moves; Seal ring 51 adopts the elastic metallic composite structure of afterbody band annulus, guarantees that seal ring 51 long-term works do not produce plastic deformation; Be divided into even three sections pressure ring 49 and be convenient in pipeline, change seal ring 51.
Claims (4)
1. a safe shell insulated butterfly valve comprises manual operating device (1) and the valve body (2) that is fixedly connected with manual operating device (1); Said manual operating device (1) comprises bounce cylinder and slotted link mechanism; Said valve body comprises valve body (38), valve seat (39), upper valve rod (32), upper connector (42), butterfly plate (46), lower valve rod (48), following link (47), end cap (53), seal ring (51), pressure ring (49), it is characterized in that:
(1) between the bounce cylinder of said manual operating device (1) and slotted link mechanism, an energy storage cam mechanism is set; Said energy storage cam mechanism is made up of cam box (8), fusiformis cam (6), guide sleeve (7), slide body, slider seat (14), combination dish spring (9), and cam box (8) is fixedly connected under the bounce cylinder, establishes cylindrical cavity in cam box (8) one ends; Establish guide sleeve (7) in the cavity; In guide sleeve (7), be provided with fusiformis cam (6), Assembly dish spring (9) outside guide sleeve (7), the large scale end face center of fusiformis cam (6) is connected with the piston rod (5) of bounce cylinder; And keep with one heart; Bottom in cam box (8) is equipped with external frame for circular slider seat (14), is provided with endoporus in slider seat (14) central authorities, is provided with at least three at slider seat (14) towards the end face that makes up dish spring (9) and is the equally distributed high outside and low outside convexity of radioactivity; Each crowning is set to be the concave surface of circular arc to the internal surface of fusiformis cam (6); And on the circular arc concave surface, offer arc groove again with the protrusion center line symmetry, two inner side surfaces of arc groove and convex center line parallel, each arc groove is identical along circular arc concave surface depth dimensions; In each arc groove, be respectively fitted with slide body; Slide body is made up of slide block (11) and roller one (10) and the roller two (12) that be assemblied in slide block (11) two ends, and slide block (11) embeds the arc groove that slider seat (14) is offered, and is provided with the combination needle bearing in the arc groove down at slide block (11); Slide block (11) can be gone up the arc direction slip of arc groove along slider seat (14); Roller one (10) contacts with the lower end surface of combination dish spring (9), and roller two (12) contacts with fusiformis cam (6) surface, is connected with cover plate (15) in the lower end of cam box (8); Cover plate (15) opposite side is connected with the rocking bar casing (16) of slotted link mechanism, and rocking bar casing (16) the other end is provided with positioning disk (21);
Be connected with driving mechanism in the slotted link mechanism bottom; Said driving mechanism comprises brake disc (23), trapezoidal nut (24), bearing one (22), magnetic clutch (25), screw rod (19), locking nut (28), bearing two (26), bearing support (27), combination worm gear (29), worm screw (30), worm screw casing (31); Trapezoidal nut (24) is erected in the positioning disk (21) through bearing one (22); The cylinder of trapezoidal nut (24) is equipped with magnetic clutch (25), bearing two (26), bearing support (27) outward successively; And lock with locking nut (28); Passing slotted link mechanism with the screw rod (19) of trapezoidal nut (24) engagement is connected with fusiformis cam (6) small size end face center with the central endoporus of slider seat (14) and keeps concentric; The end face tooth that bearing support (27) end face is provided with meshes with the end face tooth of combination worm gear (29), and worm screw casing (31) is fixedly connected with rocking bar casing (16); Connecting rod rest in the slotted link mechanism (17) is fixed on the screw rod (19);
(2) said valve body (2) is provided with the flanged (FLGD) valve necks in two ends (33); The valve neck (33) of valve body (2) is fixedly connected with the rocking bar casing (16) of slotted link mechanism in the manual operating device (1); And in valve neck (33), be equipped with stuffing box gland (34) and bearing support (35), the upper end of upper valve rod (32) is passed valve neck (33) and is connected with the delivery outlet of the crotch rocking bar (20) of the middle slotted link mechanism of manual operating device (1);
On the upper valve rod (32) of valve body (2), be provided with a shifting block key (37); On upper connector (42), be provided with a lining (36); Shifting block key (37) is connected with the keyway of lining (36) inwall; The dished spring assembly that in upper connector (42), is provided with links together upper valve rod (32) and butterfly plate (46); Dished spring assembly is made up of dish spring (43), guide rod (44), stop pin (45), bolt (41), shaft coupling (40), and the circular hole that bolt (41) passes shaft coupling (40) and upper valve rod (32) underpart is connected with guide rod (44), and stop pin (45) two ends connect guide rod (44) and butterfly plate (46) respectively;
Between lower valve rod (48) and valve body (38), be provided with joint shaft bearing (52), be provided with between lower valve rod (48) and the end cap (53) 90 ° rotating spacing.
2. a kind of safe shell insulated butterfly valve according to claim 1 is characterized in that: the quantity that slide body in the said manual operating device (1) in the energy storage cam mechanism and slider seat (14) are gone up arc groove is four, five or six.
3. a kind of safe shell insulated butterfly valve according to claim 1 is characterized in that: be arranged on the elastic metallic composite sealing ring that butterfly plate (46) seal ring (51) last and valve seat (39) formation sealing pair adopts afterbody band annulus in the said valve body (2).
4. a kind of safe shell insulated butterfly valve according to claim 1 is characterized in that: the pressure ring (49) of the fixed seal ring (51) in the said valve body (2) is set to three sections that arc length equates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201687506U CN202545840U (en) | 2012-04-20 | 2012-04-20 | Containment vessel isolation butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201687506U CN202545840U (en) | 2012-04-20 | 2012-04-20 | Containment vessel isolation butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202545840U true CN202545840U (en) | 2012-11-21 |
Family
ID=47166478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201687506U Expired - Lifetime CN202545840U (en) | 2012-04-20 | 2012-04-20 | Containment vessel isolation butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202545840U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485355A (en) * | 2016-01-21 | 2016-04-13 | 江南阀门有限公司 | Hard-sealing and low-temperature butterfly valve and sealing method thereof |
| CN114000856A (en) * | 2021-11-01 | 2022-02-01 | 胡丽敏 | Valve for oil exploitation pipeline |
| RU2794680C2 (en) * | 2021-08-13 | 2023-04-24 | Общество с ограниченной ответственностью «Уральский завод газоочистной аппаратуры» | Sealing localizing valve |
-
2012
- 2012-04-20 CN CN2012201687506U patent/CN202545840U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485355A (en) * | 2016-01-21 | 2016-04-13 | 江南阀门有限公司 | Hard-sealing and low-temperature butterfly valve and sealing method thereof |
| CN105485355B (en) * | 2016-01-21 | 2018-06-08 | 江南阀门有限公司 | A kind of hard sealing low temperature butterfly valve and its encapsulating method |
| RU2794680C2 (en) * | 2021-08-13 | 2023-04-24 | Общество с ограниченной ответственностью «Уральский завод газоочистной аппаратуры» | Sealing localizing valve |
| CN114000856A (en) * | 2021-11-01 | 2022-02-01 | 胡丽敏 | Valve for oil exploitation pipeline |
| CN114000856B (en) * | 2021-11-01 | 2024-05-07 | 跃丰阀门制造有限公司 | Valve for petroleum exploitation pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121121 |