CN210265945U

CN210265945U - Self-sealing high-pressure high-temperature gate valve

Info

Publication number: CN210265945U
Application number: CN201921143104.2U
Authority: CN
Inventors: 徐红星
Original assignee: Zhejiang Xiangyu Valve Co Ltd
Current assignee: Zhejiang Xiangyu Valve Co Ltd
Priority date: 2019-07-20
Filing date: 2019-07-20
Publication date: 2020-04-07
Anticipated expiration: 2029-07-20

Abstract

The utility model discloses a self sealss high-pressure high temperature gate valve, including disk seat and packing clamp plate, the disk seat is installed in the inside of valve body, and the valve body links together through disk seat and flashboard, the flashboard is installed to the valve rod downside, and the flashboard setting is in the cavity of seting up in the valve body, the transmission case is passed through the bearing in the upper end of valve rod, and the upper end of valve rod sets up the inside at the transmission case, the upper end at the valve body is installed to the valve gap, the lower extreme of support passes through the second double-screw bolt and the second nut is fixed on the valve gap, and valve gap internally mounted has the wedge sealing washer, the setting of four ring-opening simultaneously is in the upper end of wedge sealing washer. The self-sealing high-pressure high-temperature gate valve can be used for pipelines in petroleum, chemical, electric power, metallurgy, sugar manufacturing, pharmacy and urban construction industries, is flexible to open and close, reliable in sealing, free of inner leakage and outer leakage and long in service life.

Description

Self-sealing high-pressure high-temperature gate valve

Technical Field

The utility model relates to a gate valve equipment technical field specifically is self sealss high pressure high temperature gate valve.

Background

At present, gate valves are widely used in the electric power, hydraulic power, petrochemical and metallurgical industries and are suitable for opening and closing devices for connecting or cutting off media in pipelines in petrochemical industry, thermal power plants and steam pipelines; the existing gate valve is generally composed of a valve body, a valve seat, a gate plate, a valve rod, a valve cover, a support and a hand wheel, and the working temperature and the working pressure of the valve are not high; when the valve works, the operation torque of the valve is large, the sealing surface of the valve seat and the sealing surface of the flashboard are easy to wear, the pressure of the middle cavity of the valve body is maintained, and the sealing performance and the safety performance are poor; therefore, the working reliability of the gate valve is reduced, and the service life of the gate valve is shortened.

In order to solve the disadvantages existing in the current market, there is an urgent need for an improved gate valve device.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problems that the working temperature and the working pressure of the valve in the prior art are not high; when the valve works, the operation torque of the valve is large, the sealing surface of the valve seat and the sealing surface of the flashboard are easy to wear, the pressure of the middle cavity of the valve body is maintained, and the sealing performance and the safety performance are poor; like this, reduce the operational reliability of gate valve, shorten the life's of valve defect, provide self sealss high pressure high temperature gate valve. The valve body, the flashboard, the valve core, the valve rod and the bracket have the characteristics of flexible opening and closing, reliable sealing, no inner leakage and no outer leakage and long service life, and can be used for pipelines in petroleum, chemical industry, electric power, metallurgy, sugar manufacturing, pharmacy and urban construction industries.

In order to achieve the above object, the utility model provides a following technical scheme: the self-sealing high-pressure high-temperature gate valve comprises a valve seat and a packing pressing plate, wherein the valve seat is arranged inside the valve body, the valve body is connected with a flashboard through the valve seat, the flashboard is arranged on the lower side of a valve rod and is arranged in a cavity formed in the valve body, the upper end of the valve rod penetrates through a transmission box through a bearing, the upper end of the valve rod is arranged inside the transmission box, a valve cover is arranged at the upper end of the valve body, the lower end of a support is fixed on the valve cover through a second stud and a second nut, a wedge-shaped sealing ring is arranged inside the valve cover, meanwhile, a four-open ring is arranged at the upper end of the wedge-shaped sealing ring, the pressing plate is pressed on the upper portion of the four-open ring, a pressing plate is arranged; the jack is arranged between the packing structure and the cylindrical pin;

the packing pressing plate is provided with an eyelet bolt, the bottom of the eyelet bolt is fixed with a cylindrical pin, the packing pressing sleeve is arranged on the upper side of the packing structure, the upper end of the packing pressing sleeve is provided with the packing pressing plate, a motor rotor of the electric device is arranged inside the transmission case through a bearing, the manual shaft lever is arranged inside the transmission case through the bearing, and meanwhile, the right end of the manual shaft lever is fixed with the hand wheel through a bolt; the transmission case is internally provided with a gear and a bevel gear.

Preferably, the valve seat is inclined by 75 degrees in the valve body, and the valve body is of a T-shaped structure made of cast steel.

Preferably, the sealing surface of the gate plate and the valve seat is formed by overlaying stellite cobalt-based hard alloy; the bottom of the flashboard is in an inverted trapezoid shape; the sealing surfaces of the flashboard and the valve seat are formed by overlaying stellite-based hard alloy with different hardness, so that the flashboard and the valve seat have good wear resistance, high temperature resistance and scratch resistance and long service life; the gate valve can be used for pipelines in petroleum, chemical, electric, metallurgy, sugar manufacturing, pharmacy and urban construction industries, is flexible to open and close, reliable in sealing, free of inner leakage and outer leakage and long in service life.

Preferably, the pressure plate pad, the four open rings and the wedge-shaped sealing ring are of concentric circle structures, and the pressure plate pad, the four open rings and the wedge-shaped sealing ring are of laminated structures.

Preferably, the packing structure is flexible graphite, and the packing pressing plate, the packing pressing sleeve and the packing structure form a packing assembly of the valve.

Preferably, the jack frame is internally provided with a hole matched with the valve rod, and two ends of the jack frame are provided with fixing holes.

Preferably, the upper end of the packing pressing sleeve is inclined by 45 degrees, and the size of the packing pressing sleeve is matched with that of the packing pressing plate.

Preferably, a through hole matched with the valve rod is formed in the upper end of the support, and the upper end of the support is fixed with the bottom of the transmission case through a bolt; the valve rod is rotated clockwise, the flashboard moves downwards, and the sealing surface is matched, so that the valve rod is closed; otherwise, the starting is carried out; the valve mainly comprises five parts, namely a valve body, a flashboard, a valve core, a valve rod and a bracket; the main material adopts 20CrMoV in JB/T9625-1999 boiler pipeline accessory pressure-bearing steel casting technical condition, and the material is widely applied to castings under the working condition below 540 ℃; has higher lasting strength and heat-resisting performance.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the sealing surfaces of the flashboard and the valve seat are formed by overlaying stellite-based hard alloy with different hardness, so that the flashboard and the valve seat have good wear resistance, high temperature resistance and scratch resistance and long service life;

2. the gate valve can be used for pipelines in petroleum, chemical industry, electric power, metallurgy, sugar manufacturing, pharmacy and urban construction industries, is flexible to open and close, is reliable in sealing, and does not leak inwards or outwards;

3. the transmission mode of the transmission case can be driven by a hand wheel connected with a manual shaft lever, and can also be driven by an electric device.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a schematic view of the structure valve body of the present invention;

FIG. 3 is a top view of the structural valve body of the present invention;

FIG. 4 is a schematic view of the connection between the valve body and the valve seat;

FIG. 5 is a side view of the structural valve body of the present invention;

FIG. 6 is a schematic view of the structural valve seat of the present invention;

FIG. 7 is a schematic view of the structure of the shutter of the present invention;

FIG. 8 is a first side view of the structural gate of the present invention;

FIG. 9 is a second side view of the structural gate of the present invention;

FIG. 10 is a schematic view of the valve stem of the present invention;

fig. 11 is a schematic view of the structural valve cover of the present invention;

fig. 12 is a schematic view of the wedge-shaped sealing ring of the present invention;

FIG. 13 is a schematic diagram of the structure of the four-open loop of the present invention;

fig. 14 is a top view of the structure of the four-open loop of the present invention;

FIG. 15 is a schematic view of the press pad of the present invention;

FIG. 16 is a schematic view of the structural pressing plate of the present invention;

FIG. 17 is a schematic view of the structural jack of the present invention;

fig. 18 is a top view of the structural jack of the present invention;

FIG. 19 is a schematic view of the packing press sleeve of the present invention;

FIG. 20 is a schematic view of the packing press plate of the present invention;

FIG. 21 is a side view of the structural packing press plate of the present invention;

fig. 22 is a schematic view of the structural brace of the present invention;

fig. 23 is a sectional view of the structural brace of the present invention;

fig. 24 is a top view of the structural brace of the present invention;

fig. 25 is a schematic view of the internal structure of the transmission case of the present invention.

Reference numbers in the figures: 1. a valve body; 2. a valve seat; 3. a shutter plate; 4. a valve stem; 5. a valve cover; 6. a wedge-shaped sealing ring; 7. opening a ring; 8. a platen pad; 9. a first stud; 10. a first nut; 11. pressing a plate; 12. a second stud; 13. a second nut; 14. a filler structure; 15. a cylindrical pin; 16. a jack frame; 17. pressing and sleeving the filler; 18. an eye bolt; 19. a packing press plate; 20. a support; 21. a transmission case; 22. an electric device; 23. a manual shaft lever; 24. a rotor of an electric machine.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-25, the present invention provides a technical solution: the self-sealing high-pressure high-temperature gate valve comprises a valve seat 2 and a packing pressing plate 19, wherein the valve seat 2 is installed inside a valve body 1, the valve body 1 is connected with a gate plate 3 through the valve seat 2, the valve seat 2 is arranged in the valve body 1 in an inclined mode at 75 degrees, and the valve body 1 is of a T-shaped structure made of cast steel; the lower side of the valve rod 4 is provided with a flashboard 3, the flashboard 3 is arranged in a cavity formed in the valve body 1, and the sealing surface of the flashboard 3 and the valve seat 2 is formed by adopting stellite cobalt-based hard alloy surfacing; the bottom of the flashboard 3 is in an inverted trapezoid shape; the upper end of the valve rod 4 penetrates through the transmission box 21 through a bearing, the upper end of the valve rod 4 is arranged inside the transmission box 21, the valve cover 5 is installed at the upper end of the valve body 1, the lower end of the support 20 is fixed on the valve cover 5 through a second stud 12 and a second nut 13, the wedge-shaped sealing ring 6 is installed inside the valve cover 5, the four-open ring 7 is arranged at the upper end of the wedge-shaped sealing ring 6, the pressing plate pad 8 is pressed at the upper part of the four-open ring 7, the pressing plate 11 is arranged at the upper end of the pressing plate pad 8, meanwhile, the first stud 9 penetrates through the pressing plate 11 and is screwed into the valve cover 5, and the first stud 9; the jack 16 is arranged between the packing structure 14 and the cylindrical pin 15; a hole matched with the valve rod 4 is formed in the jack frame 16, and fixing holes are formed in two ends of the jack frame 16; the pressure plate pad 8, the four open rings 7 and the wedge-shaped sealing ring 6 are of concentric circle structures, and the pressure plate pad 8, the four open rings 7 and the wedge-shaped sealing ring 6 are of laminated structures; the movable joint bolt 18 is arranged on the packing pressing plate 19, the bottom of the movable joint bolt 18 is fixed with the cylindrical pin 15, the packing pressing sleeve 17 is arranged on the upper side of the packing structure 14, the packing pressing plate 19 is arranged at the upper end of the packing pressing sleeve 17, the upper end of the packing pressing sleeve 17 is inclined by 45 degrees, and the size of the packing pressing sleeve 17 is matched with that of the packing pressing plate 19; the packing structure 14 is flexible graphite, and the packing pressing plate 19, the packing pressing sleeve 17 and the packing structure 14 form a packing assembly of the valve; a motor rotor 24 of the electric device 22 is arranged inside the transmission case 21 through a bearing, a manual shaft rod 23 is arranged inside the transmission case 21 through a bearing, and the right end of the manual shaft rod 23 is fixed with a hand wheel through a bolt; a gear and a bevel gear are arranged in the transmission case 21; a through hole matched with the valve rod 4 is formed in the upper end of the support 20, and the upper end of the support 20 is fixed with the bottom of the transmission case 21 through a bolt;

as shown in fig. 1 and 25: by the hand wheel and the electric device 22, when the valve rod 4 is rotated clockwise, the flashboard 3 moves downwards, and the sealing surfaces are matched, the valve is closed; otherwise, the starting is carried out; the valve mainly comprises five parts, namely a valve body 1, a flashboard 3, a valve core, a valve rod 4 and a bracket 20; the main material adopts 20CrMoV in JB/T9625-1999 boiler pipeline accessory pressure-bearing steel casting technical condition, and the material is widely applied to castings under the working condition below 540 ℃; the product has high endurance strength and heat-strength performance;

the sealing surfaces of the flashboard 3 and the valve seat 2 are formed by overlaying stellite-based hard alloy with different hardness, so that the wear resistance, the high temperature resistance, the scratch resistance and the long service life are realized; the gate valve can be used for pipelines in petroleum, chemical, electric, metallurgy, sugar manufacturing, pharmacy and urban construction industries, is flexible to open and close, reliable in sealing, free of inner leakage and outer leakage and long in service life.

When the self-sealing high-pressure high-temperature gate valve is used, a packing assembly is arranged between the support 20 and the valve body 1, and comprises a packing pressing plate 19, a packing pressing sleeve 17 and a packing structure 14; the lower end of the valve rod 4 is connected with the gate plate 3, and the upper end of the valve rod 4 is connected with a driving component which penetrates through the support 20 and the packing component and is connected with the interior of the transmission case 21, so that the valve rod 4 can be driven by the driving component in the transmission case 21 to do linear motion, and the gate plate 3 is driven to do linear motion, and the gate valve is opened and closed; the transmission box 21 has the advantages of reasonable structure, convenient use, small abrasion, long service life, good sealing performance and high safety performance, and is suitable for high-temperature and high-pressure media, and the transmission mode of the transmission box 21 can be driven by a hand wheel connected with a manual shaft rod 23 and can also be driven by an electric device 22; this is the whole process of the self-sealing high-pressure high-temperature gate valve.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Self sealss high pressure high temperature gate valve, including disk seat (2) and packing clamp plate (19), its characterized in that: the valve seat (2) is installed in the valve body (1), the valve body (1) is connected with the flashboard (3) through the valve seat (2), the flashboard (3) is installed on the lower side of the valve rod (4), the flashboard (3) is arranged in a cavity formed in the valve body (1), the upper end of the valve rod (4) penetrates through the transmission box (21) through the bearing, the upper end of the valve rod (4) is arranged in the transmission box (21), the valve cover (5) is installed at the upper end of the valve body (1), the lower end of the support (20) is fixed on the valve cover (5) through the second studs (12) and the second nuts (13), the wedge-shaped sealing ring (6) is installed inside the valve cover (5), meanwhile, the four ring (7) is arranged at the upper end of the wedge-shaped sealing ring (6), the pressing plate pad (8) is pressed on the upper end of the four ring (7), the pressing plate pad (8) is provided with the pressing plate (11), and meanwhile, the first stud (9) penetrates through, a first nut (10) is arranged on the first stud (9); the jack frame (16) is arranged between the packing structure (14) and the cylindrical pin (15);

the movable joint bolt (18) is mounted on the packing pressing plate (19), the bottom of the movable joint bolt (18) is fixed with the cylindrical pin (15), the packing pressing sleeve (17) is arranged on the upper side of the packing structure (14), the packing pressing plate (19) is mounted at the upper end of the packing pressing sleeve (17), a motor rotor (24) of the electric device (22) is arranged inside the transmission case (21) through a bearing, the manual shaft lever (23) is arranged inside the transmission case (21) through a bearing, and meanwhile the right end of the manual shaft lever (23) is fixed with the hand wheel through a bolt; a gear and a bevel gear are arranged in the transmission case (21).

2. The self sealing high pressure high temperature gate valve of claim 1, wherein: the valve seat (2) is arranged in the valve body (1) in an inclined mode at an angle of 75 degrees, and the valve body (1) is of a T-shaped structure made of cast steel materials.

3. The self sealing high pressure high temperature gate valve of claim 1, wherein: the sealing surfaces of the flashboard (3) and the valve seat (2) are formed by adopting stellite cobalt-based hard alloy surfacing; and the bottom of the flashboard (3) is arranged in an inverted trapezoid shape.

4. The self sealing high pressure high temperature gate valve of claim 1, wherein: the pressing plate pad (8), the four open rings (7) and the wedge-shaped sealing ring (6) are of concentric circle structures, and the pressing plate pad (8), the four open rings (7) and the wedge-shaped sealing ring (6) are of layered structures.

5. The self sealing high pressure high temperature gate valve of claim 1, wherein: the packing structure (14) is flexible graphite, and the packing pressing plate (19), the packing pressing sleeve (17) and the packing structure (14) form a packing assembly of the valve.

6. The self sealing high pressure high temperature gate valve of claim 1, wherein: the hole matched with the valve rod (4) is formed in the jack frame (16), and fixing holes are formed in two ends of the jack frame (16).

7. The self sealing high pressure high temperature gate valve of claim 1, wherein: the upper end of the packing pressing sleeve (17) is inclined by 45 degrees, and the size of the packing pressing sleeve (17) is matched with that of the packing pressing plate (19).

8. The self sealing high pressure high temperature gate valve of claim 1, wherein: the upper end of the support (20) is internally provided with a through hole matched with the valve rod (4), and the upper end of the support (20) is fixed with the bottom of the transmission case (21) through a bolt.