CN215806396U

CN215806396U - High-pressure stop valve

Info

Publication number: CN215806396U
Application number: CN202122092230.3U
Authority: CN
Inventors: 周建旺; 石建祥
Original assignee: Zhejiang Weilun Valve Co ltd
Current assignee: Zhejiang Weilun Valve Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-02-11
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a high-pressure stop valve, which comprises a valve body, a valve cover, a valve rod and a valve clack, wherein an inlet flow passage and an outlet flow passage are arranged at two ends of the valve body; the valve clack includes outer valve clack, interior valve clack and valve clack lid, the valve clack lid cover is established in the valve rod periphery, and valve clack lid threaded connection is in the top of outer valve clack, be equipped with the overflow chamber between valve clack lid and the outer valve clack, the bottom middle part of outer valve clack is seted up and is flowed the lower hole that the chamber is linked together, the lateral part of outer valve clack is seted up and is flowed the side opening that the chamber is linked together, interior valve clack sets up in the overflow chamber, the height that highly is less than the overflow chamber of interior valve clack, the lower extreme of valve rod is equipped with the connecting portion that the cross-section is T shape, the spread groove that the cross-section is used for supplying the connecting portion embedding of T shape is seted up to the lateral part of interior valve clack. The utility model has the advantage of small opening and closing operation torque and is suitable for high-pressure medium environment.

Description

High-pressure stop valve

Technical Field

The utility model relates to the technical field of valves, in particular to a high-pressure stop valve.

Background

The stop valve is also called as cut-off valve, belonging to forced sealing type valve, the opening and closing member of the stop valve is a plug-shaped valve flap, the upper surface of the seal is a plane or sea cone surface, and the valve flap makes linear motion along the central line of the valve seat. The valve rod can move in a mode (the common name is a hidden rod) and can also be used for controlling the flow of various types of fluid such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like in a lifting rotating rod mode. Therefore, this type of shut-off valve is very suitable for shut-off or regulation and throttling. The valve rod of the valve has relatively short opening or closing stroke and reliable cut-off function, and the valve is suitable for regulating flow rate owing to the proportional relation between the valve seat port change and the valve clack stroke.

The medium flow direction of a common small-caliber or low-pressure stop valve is generally low in and high out, namely, the medium enters from the lower part of a valve clack, the water on the top of the valve clack is closed, and the axial force of a valve rod needs to be large. For a stop valve with a large caliber or high pressure, a medium inlet/outlet mode is designed, but because the pressure difference between an inlet flow passage and an outlet flow passage of the valve is large, the opening and closing operation torque of the valve is large, and the problem to be solved is always needed in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-pressure stop valve which has the advantage of small opening and closing operation torque and is suitable for a high-pressure medium environment.

In order to achieve the purpose, the utility model provides the following technical scheme: a high-pressure stop valve comprises a valve body, a valve cover, a valve rod and a valve clack, wherein an inlet flow passage and an outlet flow passage are arranged at two ends of the valve body, a flow passage opening for communicating the inlet flow passage and the outlet flow passage is arranged in the valve body, the valve cover is arranged on the valve neck end of the valve body, a valve hole is formed in the middle of the valve cover, the valve rod penetrates through the valve hole, and the bottom end of the valve rod extends into the inlet flow passage and is in linkage connection with the valve clack; the valve clack includes outer valve clack, interior valve clack and valve clack lid, the valve clack lid cover is established in the valve rod periphery to valve clack lid screwed connection is in the top of outer valve clack, is equipped with the overflow chamber between valve clack lid and the outer valve clack, the bottom middle part of outer valve clack is seted up and is flowed the lower hole that the chamber is linked together, and the lateral part of outer valve clack is seted up and is flowed the side opening that the chamber is linked together, interior valve clack sets up in overflowing the chamber, highly being less than the height in overflow chamber of interior valve clack to the diameter of interior valve clack is greater than the diameter in lower hole, the lower extreme of valve rod is equipped with the connecting portion that the cross-section is T shape, the lateral part of interior valve clack is seted up the cross-section and is the T shape and is used for the confession the spread groove of connecting portion embedding.

Through adopting above-mentioned technical scheme, when opening the valve, the valve rod drives the inner valve clack earlier and goes upward in the chamber that overflows of outer valve clack, the medium of inlet flow channel loops through the side opening, overflow the chamber, lower hole and discharge orifice enter into outlet flow channel, pressure differential between inlet flow channel and the outlet flow channel has been reduced, realize the effect of pressure release, after inner valve clack went upward to overflowing the chamber top, along with valve rod drive inner valve clack and continue to go upward, inner valve clack drives outer valve clack and goes upward, it is all opened to overflow the mouth, accomplish opening of valve, thereby greatly reduced the operating torque that the valve opened and close, be applicable to high-pressure medium environment.

The utility model is further arranged in that the upper end of the valve clack cover is provided with a limit flange which extends outwards and is used for abutting against the upper end face of the outer valve clack, and a buffer cushion is clamped between the limit flange and the outer valve clack.

Through adopting above-mentioned technical scheme, limit flange plays the limiting displacement to the valve clack lid, and the blotter can play the effect of protection limit flange and outer valve clack, can play the effect of the pretension effect that promotes the valve clack lid again to play the anticreep effect to the valve clack lid.

The utility model is further arranged in such a way that the lower end of the valve clack cover is circumferentially provided with an annular flange, the inner wall of the annular flange is in interference fit with a shaft sleeve, and the inner periphery of the shaft sleeve is attached to the outer periphery of the outer valve clack.

Through adopting above-mentioned technical scheme, can play the guide effect to interior valve clack, can reduce the friction that interior valve clack received again to promote the life of interior valve clack.

The utility model is further provided that a first wear-resistant coating is arranged on the lower end surface of the inner valve clack, and a second wear-resistant coating which is in sealing fit with the first wear-resistant coating is arranged on the inner end surface of the outer valve clack.

Through adopting above-mentioned technical scheme, can not only promote the life of interior valve clack and outer valve clack, can promote the leakproofness when the two offsets moreover.

The utility model is further arranged in such a way that an annular groove is formed in the position, clamped on the periphery, of the lower end face of the outer valve clack, a wear-resisting ring used for abutting against the upper end of the overflowing opening is connected to the annular groove through a screw, and a sealing gasket is clamped between the wear-resisting ring and the outer valve clack.

Through adopting above-mentioned technical scheme, long-term back of using, wear-resisting circle wearing and tearing only need change wear-resisting circle can, need not to change whole outer valve clack, greatly reduced the maintenance cost.

The valve further comprises a compression assembly acting on the valve cover, wherein the compression assembly comprises four open rings, a pressing plate ring and a sealing ring, the periphery of the valve cover is attached to the inner periphery of the valve neck end of the valve body, an annular sealing groove is formed in the periphery of the valve cover, a first annular mounting groove is formed in the inner wall of the valve neck end of the valve body, the pressing plate ring and the sealing ring are sequentially arranged in the annular sealing groove from top to bottom, the four open rings are embedded in the first annular mounting groove, and the four open rings are abutted against the upper end face of the pressing plate ring.

Through adopting above-mentioned technical scheme, not only can effectively carry out fixed mounting to the valve gap, can promote the leakproofness of installation between valve gap and the valve body moreover, avoid inside medium to leak from the clearance between the two.

The utility model further provides a sealing assembly, the sealing assembly comprises a first packing group, a spacer ring, a second packing group, a packing pressing sleeve, a packing pressing plate, a split ring and a jack seat, a sealing cavity is formed in the position, located at the outer end of the valve hole, of the valve cover, the packing pressing plate, the packing pressing sleeve, the first packing group, the spacer ring and the second packing group are sequentially sleeved on the periphery of the valve rod from top to bottom, the first packing group, the spacer ring and the second packing group are arranged in the sealing cavity, a second annular mounting groove is formed in the periphery of the valve cover, the split ring is embedded in the second annular mounting groove, the jack seat is sleeved on the periphery of the valve cover, the upper end of the jack seat abuts against the lower end of the split ring, and the packing pressing plate is connected with the jack seat in a locking mode through a locking bolt.

Through adopting above-mentioned technical scheme, can promote the sealing performance between valve gap and the valve rod, avoid inside medium to leak from the clearance between the two.

The four-ring valve is characterized by further comprising a baffle ring, wherein the baffle ring is sleeved on the periphery of the valve cover, the jack seat is in threaded connection with a compression screw for pressing the baffle ring on the four-ring opening, and the bottom of the baffle ring is provided with a compression flange attached to the inner wall of the four-ring opening.

Through adopting above-mentioned technical scheme, can promote the steadiness of four ring-opening installations, and then promote the steadiness of valve gap installation.

By adopting the technical scheme, the valve neck end of the valve body is connected with the support, the bevel gear transmission box is installed on the support, the input end of the bevel gear transmission box is connected with the hand wheel, and the output end of the bevel gear transmission box is in linkage connection with the valve rod.

Through adopting above-mentioned technical scheme, required moment when can reduce the hand wheel and rotate to reduce the required moment of valve start-stop operation.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a schematic view of the connection structure of the valve clack and the valve rod;

fig. 3 is a schematic structural view of the hold-down assembly and the seal assembly of the present invention.

In the figure: 1. a valve body; 2. a valve cover; 3. a valve stem; 4. a valve flap; 5. an inlet flow channel; 6. an outlet flow passage; 7. a flow-through port; 8. a valve bore; 9. an outer valve flap; 10. an inner valve flap; 11. a valve flap cover; 12. a flow-through chamber; 13. a lower hole; 14. a side hole; 15. a connecting portion; 16. connecting grooves; 17. a limiting flange; 18. a cushion pad; 19. an annular flange; 20. a shaft sleeve; 21. a first wear resistant coating; 22. a second wear resistant coating; 23. an annular groove; 24. wear-resistant rings; 25. a gasket; 26. a compression assembly; 27. opening a ring; 28. a platen ring; 29. a seal ring; 30. an annular seal groove; 31. a first annular mounting groove; 32. a seal assembly; 33. a first packing set; 34. a spacer ring; 35. a second filler group; 36. pressing and sleeving the filler; 37. a packing press plate; 38. opening the ring; 39. a jack seat; 40. sealing the cavity; 41. a second annular mounting groove; 42. locking the bolt; 43. a baffle ring; 44. a compression screw; 45. a compression flange; 46. a support; 47. a bevel gear transmission case; 48. a handwheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): the high-pressure stop valve shown in the attached figures 1-3 comprises a valve body 1, a valve cover 2, a valve rod 3 and a valve clack 4, wherein an inlet flow passage 5 and an outlet flow passage 6 are arranged at two ends of the valve body 1, a flow passage opening 7 for communicating the inlet flow passage 5 with the outlet flow passage 6 is arranged in the valve body 1, the valve cover 2 is arranged on the valve neck end of the valve body 1, a valve hole 8 is formed in the middle of the valve cover 2, the valve rod 3 penetrates through the valve hole 8, and the bottom end of the valve rod 3 extends into the inlet flow passage 5 to be connected with the valve clack 4 in a linkage manner; valve clack 4 includes outer valve clack 9, interior valve clack 10 and valve clack lid 11, valve clack lid 11 cover is established in valve rod 3 periphery to 11 threaded connection of valve clack lid are in the top of outer valve clack 9, are equipped with overflow chamber 12 between valve clack lid 11 and the outer valve clack 9, the bottom middle part of outer valve clack 9 offers the lower hole 13 that is linked together with overflow chamber 12, and lateral part of outer valve clack 9 is offered and is linked together with overflow chamber 12's side opening 14, interior valve clack 10 sets up in overflow chamber 12, interior valve clack 10 highly is less than overflow chamber 12's height, and interior valve clack 10's diameter is greater than the diameter of lower hole 13, the lower extreme of valve rod 3 is equipped with connecting portion 15 that the cross-section is T shape, interior valve clack 10's lateral part is offered the cross-section and is used for the confession for T shape connecting groove 16 of connecting portion 15 embedding. When the valve is opened, the valve rod 3 drives the inner valve clack 10 to move upwards in the overflowing cavity 12 of the outer valve clack 9, a medium of the inlet flow channel 5 sequentially passes through the side hole 14, the overflowing cavity 12, the lower hole 13 and the overflowing hole to enter the outlet flow channel 6, the pressure difference between the inlet flow channel 5 and the outlet flow channel 6 is reduced, the pressure relief effect is realized, after the inner valve clack 10 moves upwards to the top of the overflowing cavity 12, the inner valve clack 10 drives the inner valve clack 10 to continue to move upwards, the inner valve clack 10 drives the outer valve clack 9 to move upwards, the overflowing hole 7 is completely opened, the opening of the valve is completed, the operating torque for opening and closing the valve is greatly reduced, and the valve is suitable for a high-pressure medium environment.

As shown in fig. 2, the upper end of the flap cover 11 is provided with a limit flange 17 extending outward for abutting against the upper end surface of the outer flap 9, and a cushion 18 is interposed between the limit flange 17 and the outer flap 9. The limit flange 17 has the limit effect on the valve clack cover 11, and the cushion pad 18 can not only have the effect of protecting the limit flange 17 and the outer valve clack 9, but also have the function of improving the pre-tightening force of the valve clack cover 11, so that the anti-falling effect on the valve clack cover 11 is achieved.

As shown in fig. 2, an annular flange 19 is circumferentially arranged at the lower end of the valve flap cover 11, a shaft sleeve 20 is in interference fit with the inner wall of the annular flange 19, and the inner periphery of the shaft sleeve 20 is attached to the outer periphery of the outer valve flap 9. The shaft sleeve 20 can not only guide the inner valve flap 10, but also reduce the friction on the inner valve flap 10, thereby prolonging the service life of the inner valve flap 10.

As shown in fig. 2, a first wear-resistant coating 21 is disposed on the lower end surface of the inner valve flap 10, and a second wear-resistant coating 22 for forming a sealing fit with the first wear-resistant coating 21 is disposed on the inner end surface of the outer valve flap 9. The design can not only improve the service life of the inner valve clack 10 and the outer valve clack 9, but also improve the sealing performance when the two are mutually balanced.

As shown in fig. 2, an annular groove 23 is formed in a position where the lower end surface of the outer valve flap 9 is clamped on the periphery, a wear-resistant ring 24 for abutting against the upper end of the flow passage 7 is connected to the annular groove 23 through a screw, and a sealing gasket 25 is clamped between the wear-resistant ring 24 and the outer valve flap 9. After long-term use, the wear-resistant ring 24 only needs to be replaced when worn, the whole outer valve clack 9 does not need to be replaced, and the maintenance cost is greatly reduced.

As shown in fig. 3, this stop valve is still including the compressing tightly subassembly 26 that acts on valve gap 2, compressing tightly subassembly 26 includes four ring openings 27, clamp plate circle 28 and sealing washer 29, the periphery of valve gap 2 is laminated with the valve neck end inner periphery of valve body 1 mutually, annular seal groove 30 has been seted up to the periphery of valve gap 2, first annular mounting groove 31 has been seted up on the inner wall of the valve neck end of valve body 1, clamp plate circle 28 and sealing washer 29 set gradually in annular seal groove 30 from top to bottom, four ring openings 27 are inlayed and are established in first annular mounting groove 31 to four ring openings 27 support tightly on the up end of clamp plate circle 28. This design not only can effectively carry out fixed mounting to valve gap 2, can promote the leakproofness of installation between valve gap 2 and the valve body 1 moreover, avoids inside medium to leak from the clearance between the two.

As shown in fig. 3, the stop valve further comprises a sealing assembly 32, wherein the sealing assembly 32 comprises a first packing group 33, a spacer ring 34, a second packing group 35, a packing pressing sleeve 36, a packing pressing plate 37, a split ring 38 and a jack seat 39, a sealing cavity 40 is arranged at the position of the valve cover 2 positioned at the outer end of the valve hole 8, the packing press plate 37, the packing press sleeve 36, the first packing group 33, the spacer ring 34 and the second packing group 35 are sequentially sleeved on the periphery of the valve rod 3 from top to bottom, and the first packing set 33, the spacer ring 34 and the second packing set 35 are arranged in the seal cavity 40, a second annular installation groove 41 is formed in the periphery of the valve cover 2, the split ring 38 is embedded in the second annular installation groove 41, the jack seat 39 is sleeved on the periphery of the valve cover 2, and the upper end of the jack seat 39 is abutted against the lower end of the split ring 38, and the packing press plate 37 is locked and connected with the jack seat 39 through a locking bolt 42. This design can promote the sealing performance between valve gap 2 and the valve rod 3, avoids the internal medium to leak from the clearance between the two.

As shown in fig. 3, the stop valve further comprises a baffle ring 43, the baffle ring 43 is sleeved on the periphery of the valve cover 2, a compression screw 44 for pressing the baffle ring 43 on the four-open ring 27 is connected to the jack seat 39 through a thread, and a compression flange 45 attached to the inner wall of the four-open ring 27 is arranged at the bottom of the baffle ring 43. This design can promote the steadiness of four ring-opening 27 installations, and then promotes the steadiness of valve gap 2 installation.

As shown in fig. 1, a support 46 is connected to a neck end of the valve body 1, a bevel gear transmission case 47 is mounted on the support 46, an input end of the bevel gear transmission case 47 is connected with a hand wheel 48, and an output end of the bevel gear transmission case 47 is in linkage connection with the valve rod 3. This design reduces the torque required to turn the hand wheel 48 and thus the torque required to operate the valve on and off.

Claims

1. A high-pressure stop valve comprises a valve body (1), a valve cover (2), a valve rod (3) and a valve clack (4), wherein an inlet flow passage (5) and an outlet flow passage (6) are arranged at two ends of the valve body (1), a flow passing port (7) for communicating the inlet flow passage (5) with the outlet flow passage (6) is arranged in the valve body (1), the valve cover (2) is installed on the valve neck end of the valve body (1), a valve hole (8) is formed in the middle of the valve cover (2), the valve rod (3) penetrates through the valve hole (8), and the bottom end of the valve rod (3) extends into the inlet flow passage (5) to be connected with the valve clack (4) in a linkage mode; the method is characterized in that: valve clack (4) are including outer valve clack (9), interior valve clack (10) and valve clack lid (11), valve rod (3) periphery is established to valve clack lid (11) cover to valve clack lid (11) threaded connection is in the top of outer valve clack (9), is equipped with between valve clack lid (11) and outer valve clack (9) and flows chamber (12), lower hole (13) that are linked together with flowing chamber (12) are seted up at the bottom middle part of outer valve clack (9), and lateral opening (14) that are linked together with flowing chamber (12) are seted up to the lateral part of outer valve clack (9), interior valve clack (10) set up in flowing chamber (12), the height that highly is less than flowing chamber (12) of interior valve clack (10) to the diameter of interior valve clack (10) is greater than the diameter of lower hole (13), the lower extreme of valve rod (3) is equipped with connecting portion (15) that the cross-section is the T shape, the lateral part of interior valve clack (10) is seted up and is used for the confession for the connecting groove of connecting portion (15) embedding for the T shape, the cross-shaped 16).

2. A high pressure shut-off valve as claimed in claim 1, wherein: the upper end of the valve clack cover (11) is provided with a limiting flange (17) which extends towards the periphery and is used for abutting against the upper end face of the outer valve clack (9), and a buffer pad (18) is clamped between the limiting flange (17) and the outer valve clack (9).

3. A high pressure shut-off valve as claimed in claim 1, wherein: the lower extreme of valve clack lid (11) is provided with annular flange (19) along circumference, interference fit has axle sleeve (20) on the inner wall of annular flange (19), the interior week of axle sleeve (20) is laminated with the periphery of outer valve clack (9) mutually.

4. A high pressure shut-off valve as claimed in claim 1, wherein: the lower end face of the inner valve clack (10) is provided with a first wear-resistant coating (21), and the inner end face of the outer valve clack (9) is provided with a second wear-resistant coating (22) which is in sealing fit with the first wear-resistant coating (21).

5. A high pressure shut-off valve as claimed in claim 1, wherein: the valve is characterized in that an annular groove (23) is formed in the position, clamped on the periphery, of the lower end face of the outer valve clack (9), a wear-resistant ring (24) used for abutting against the upper end of the overflowing opening (7) is connected to the annular groove (23) through a screw, and a sealing gasket (25) is clamped between the wear-resistant ring (24) and the outer valve clack (9).

6. A high pressure shut-off valve as claimed in claim 1, wherein: still including compressing tightly subassembly (26) that acts on valve gap (2), compress tightly subassembly (26) including four ring opening (27), clamp plate circle (28) and sealing washer (29), the periphery of valve gap (2) is laminated with the valve neck end inner circumference of valve body (1) mutually, annular seal groove (30) have been seted up to the periphery of valve gap (2), first annular mounting groove (31) have been seted up on the inner wall of the valve neck end of valve body (1), clamp plate circle (28) and sealing washer (29) set gradually in annular seal groove (30) from top to bottom, four ring opening (27) are inlayed and are established in first annular mounting groove (31) to four ring opening (27) support tightly on the up end of clamp plate circle (28).

7. A high pressure shut-off valve as claimed in claim 6, wherein: the sealing assembly (32) comprises a first packing group (33), a spacer ring (34), a second packing group (35), a packing pressing sleeve (36), a packing pressing plate (37), a split ring (38) and a jack seat (39), a sealing cavity (40) is formed in the position, located at the outer end of the valve hole (8), of the valve cover (2), the packing pressing plate (37), the packing pressing sleeve (36), the first packing group (33), the spacer ring (34) and the second packing group (35) are sequentially sleeved on the periphery of the valve rod (3) from top to bottom, the first packing group (33), the spacer ring (34) and the second packing group (35) are arranged in the sealing cavity (40), a second annular mounting groove (41) is formed in the periphery of the valve cover (2), the split ring (38) is embedded in the second annular mounting groove (41), and the jack seat (39) is sleeved on the periphery of the valve cover (2), and the upper end of the jack seat (39) is propped against the lower end of the split ring (38), and the packing press plate (37) is connected with the jack seat (39) in a locking way through a locking bolt (42).

8. A high pressure shut-off valve as claimed in claim 7, wherein: still include baffle circle (43), the cover is established in valve gap (2) periphery in baffle circle (43), threaded connection has on very heavy seat (39) and is used for pressing pressure screw (44) on four ring openings (27) baffle circle (43), the bottom of baffle circle (43) is equipped with compresses tightly flange (45) of laminating mutually with four ring openings (27) inner walls.

9. A high pressure shut-off valve as claimed in claim 1, wherein: the valve is characterized in that a support (46) is connected to the neck end of the valve body (1), a bevel gear transmission box (47) is mounted on the support (46), a hand wheel (48) is connected to the input end of the bevel gear transmission box (47), and the output end of the bevel gear transmission box (47) is in linkage connection with the valve rod (3).