CN218094328U

CN218094328U - High-pressure gate valve

Info

Publication number: CN218094328U
Application number: CN202222544983.8U
Authority: CN
Inventors: 高锡锋; 林倩; 马鸽; 王青鹤; 王世恩
Original assignee: Kaifeng High And Middle Pressure Valve Co ltd
Current assignee: Kaifeng High And Middle Pressure Valve Co ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2022-12-20
Anticipated expiration: 2032-09-26

Abstract

The utility model relates to a high-pressure gate valve, including the valve body, be provided with the valve gap on the valve body, be provided with the valve rod on the valve gap, be provided with the flashboard on the bottom of valve rod, equally divide in the valve body inner chamber of flashboard both sides and do not set up the disk seat, the disk seat be provided with first enhancement sealing ring towards the one side of flashboard in, first enhancement sealing ring adopts the annular structure of being made by Stellite-12# cobalt chromium tungsten alloy, the flashboard is provided with the second on the one side of disk seat and strengthens the sealing ring, sealing ring and first enhancement sealing ring swing joint are strengthened to the second, the annular structure that the sealing ring adoption was made by Stellite-6# cobalt chromium tungsten alloy is strengthened to the second, the valve body inner chamber of flashboard both sides is linked together through the decompression pipe, is provided with the stop valve on the decompression pipe. The front and back pressure difference of the flashboard is reduced in the opening and closing processes of the flashboard, so that the abrasion degree of a sealing surface between the flashboard and the valve seat is reduced; the utility model discloses adjust, convenient to use, have extensive market prospect.

Description

High-pressure gate valve

Technical Field

The utility model relates to a valve field, concretely relates to high-pressure gate valve.

Background

The opening and closing part of the gate valve is a gate plate, the moving direction of the gate plate is vertical to the fluid direction, and the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled. The gate plate of the wedge gate valve can be made into a whole, which is called a rigid gate plate; the gate plate can also be made into a gate plate capable of generating micro deformation so as to improve the manufacturability of the gate plate and compensate the deviation of the angle of the sealing surface in the machining process, and the gate plate is called an elastic gate plate. When the gate valve is closed, the sealing surface can be sealed only by medium pressure, namely, the sealing surface of the gate plate is pressed to the valve seat on the other side by the medium pressure to ensure the sealing of the sealing surface, namely, the gate valve is self-sealed. Most gate valves are forcedly sealed, namely, when the valves are closed, the gate plates are forced to press the valve seats by external force so as to ensure the sealing performance of the sealing surfaces. The gate plate of the gate valve moves linearly along with the valve rod, and is called a lifting rod gate valve and a rising rod gate valve. Usually, the lifting rod is provided with trapezoidal threads, and the rotating motion is changed into the linear motion, namely the operation torque is changed into the operation thrust force through a nut at the top end of the valve and a guide groove on the valve body.

The gate valve is applied to a high-pressure medium conveying system, particularly a liquid-phase high-pressure medium, and when the gate valve is opened and closed, the actuating mechanism drives the flashboard to move up and down through the valve rod. For the great occasion of medium velocity of flow, because the pressure difference is great around the flashboard, at the flashboard in-process of opening and closure, the pressure differential around the flashboard directly acts on the flashboard, because the pressure difference is great then directly increased the frictional force between flashboard and the disk seat in opening and closure process, increase the sealed face degree of wear between flashboard and the disk seat, directly influence the life of gate valve.

Disclosure of Invention

The utility model provides a to prior art not enough, the utility model provides a reduce the flashboard open with closed in-process flashboard around pressure differential and then reduce the high-pressure gate valve of the sealed face degree of wear between flashboard and the disk seat for overcome defect among the prior art.

The utility model discloses a technical scheme do: the utility model provides a high-pressure gate valve, includes the valve body, is provided with the valve gap on the valve body, is provided with the valve rod on the valve gap, is provided with the flashboard on the bottom of valve rod, equally divides in the valve body inner chamber of flashboard both sides and does not set up the disk seat, the disk seat be provided with first enhancement sealing ring towards the one side of flashboard, first enhancement sealing ring adopts the cyclic annular structure of being made by Stellite-12# cobalt chromium tungsten alloy, the flashboard is provided with the second on the one side of disk seat and strengthens the sealing ring, sealing ring and first enhancement sealing ring swing joint are strengthened to the second, the second is strengthened the sealing ring and is adopted the cyclic annular structure of being made by Stellite-6# cobalt chromium tungsten alloy, the valve body inner chamber of flashboard both sides is linked together through the decompression pipe, is provided with the stop valve on the decompression pipe.

Preferably, the top of valve gap be provided with valve rod seal groove, be provided with packing backing ring on the valve rod of valve rod seal groove inboard, packing backing ring is provided with gland on the valve rod of packing backing ring top, be provided with second graphite sealing ring and third graphite sealing ring in the valve rod seal groove between packing backing ring and the gland.

Preferably, the valve cover outside set gradually first packing sealing ring, packing clamping ring and sealed lid, be provided with the spacing groove on the valve body inner wall between packing clamping ring and the sealed lid, the spacing inslot is provided with the stopper, stopper and packing clamping ring swing joint are provided with first fastening bolt on valve cover and the sealed lid, are provided with first fastening nut on the first fastening bolt of sealed lid top.

Preferably, the top of the valve body is provided with a connecting ring, the connecting ring is provided with a limiting slide rod parallel to the valve rod, the limiting slide rod and the valve rod are provided with connecting plates, the valve rod is movably sleeved on the connecting plates, the connecting plates are installed at the top of the limiting slide rod, limiting plates are arranged on the limiting slide rod and the valve rod, the limiting plates are fixedly installed on the valve rod, and the limiting plates are movably sleeved on the limiting slide rod.

Preferably, the top of the packing gland is provided with a packing pressing plate, the top of the valve cover is provided with a connecting wing plate, the connecting wing plate is hinged with the bottom end of a second fastening bolt, the packing pressing plate is movably sleeved on the second fastening bolt, and a second fastening nut is arranged on the second fastening bolt above the packing pressing plate.

Preferably, the number of spacing groove adopts a plurality of, and a plurality of spacing groove is star evenly distributed in the outside of valve rod, and the quantity of stopper and the quantity of spacing groove are corresponding.

Preferably, the number of the second graphite sealing ring and the third graphite sealing ring is a plurality, and the second graphite sealing rings and the third graphite sealing rings are sequentially and alternately sleeved on the valve rod on the inner side of the valve rod sealing groove along the direction from the packing gasket ring to the packing gland.

The utility model discloses beneficial effect is: at first, the utility model discloses a be linked together the valve body inner chamber of flashboard both sides through the decompression pipe and install the stop valve on the decompression pipe, at the opening process of flashboard and the closed in-process of flashboard, the stop valve is in the state of opening, the effectual pressure differential that reduces the flashboard both sides, frictional force between flashboard and the disk seat has been reduced, and this product second is strengthened the annular structure that sealing ring and first enhancement sealing ring all adopted to be made by the Stellite alloy, it is better for traditional austenitic stainless steel wearability, the durability of whole equipment has been improved.

Secondly, the valve gap outside set gradually first filler sealing ring, filler clamping ring and sealed lid, be provided with the spacing groove on the valve body inner wall between filler clamping ring and the sealed lid, the spacing inslot is provided with the stopper, the quantity of spacing groove adopts a plurality of, and a plurality of spacing groove is star evenly distributed in the outside of valve rod, and the quantity of stopper and the quantity of spacing groove are corresponding. The number of the limiting grooves is preferably four, five or six. The quantity of the limiting blocks is increased, and the plurality of limiting blocks are uniformly distributed on the outer side of the valve rod, so that the stress uniformity of the packing compression ring is improved.

The utility model has the advantages of simple structure, convenient operation, design benefit has improved work efficiency greatly, has fine social and economic benefits, is the product of easily using widely.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged schematic view of detail a of fig. 1.

Fig. 3 is a partially enlarged view of detail B of fig. 1.

Fig. 4 is a schematic structural view of the components of the present invention.

Detailed Description

As shown in fig. 1 to 4, a high-pressure gate valve comprises a valve body 1, wherein a valve cover 2 is arranged on the valve body 1, a valve rod 3 is arranged on the valve cover 2, a gate plate 4 is arranged at the bottom end of the valve rod 3, valve seats 5 are uniformly arranged in inner cavities of the valve body 1 on two sides of the gate plate 4 respectively, a first reinforcing sealing ring 6 is arranged on one surface of each valve seat 5, which faces the gate plate 4, the first reinforcing sealing ring 6 adopts an annular structure made of Stellite-12# cobalt-chromium-tungsten alloy, a second reinforcing sealing ring 7 is arranged on one surface of each gate plate 4, which faces the valve seat 5, the second reinforcing sealing ring 7 is movably connected with the first reinforcing sealing ring 6, the second reinforcing sealing ring 7 adopts an annular structure made of Stellite-6# cobalt-chromium-tungsten alloy, the second reinforcing sealing ring 7 is fixedly arranged on the gate plate 4 in a surfacing mode, and the first reinforcing sealing ring 6 is fixedly arranged on the gate plate 4 in a surfacing mode; the inner cavities of the valve bodies 1 at the two sides of the flashboard 4 are communicated through a decompression pipe 8, and a stop valve 9 is arranged on the decompression pipe 8. The hardness of second enhancement sealing ring 7 is less than the hardness of first enhancement sealing ring 6, and then the wearing and tearing are changeed for first enhancement sealing ring 6 to second enhancement sealing ring 7, and moreover second enhancement sealing ring 7 is installed on flashboard 4, if maintenance condition flashboard 4 appears and more easily follow valve body 1 and dismantle the change, the maintenance of being convenient for disk seat 5.

The top of valve gap 2 be provided with valve rod seal groove 10, be provided with packing backing ring 11 on the valve rod 3 of valve rod seal groove 10 inboard, packing backing ring 11 is provided with gland 12 on the valve rod 3 of packing backing ring 11 top, be provided with second graphite sealing ring 13 and third graphite sealing ring 14 in the valve rod seal groove 10 between packing backing ring 11 and the gland 12. The quantity of second graphite sealing ring 13 and third graphite sealing ring 14 all adopts a plurality of, and a plurality of second graphite sealing ring 13 and a plurality of third graphite sealing ring 14 suit in proper order along the direction of packing backing ring 11 to gland 12 on the inboard valve rod 3 of valve rod seal groove 10 in turn. The second graphite sealing ring 13 is of an annular structure made of flexible graphite filler, and the third graphite sealing ring 14 is of an annular structure made of woven graphite filler.

The outer side of the valve cover 2 is sequentially provided with a first packing sealing ring 15, a packing compression ring 16 and a sealing cover 17, and the first packing sealing ring 15 adopts an annular structure made of graphite packing; a limiting groove 18 is formed in the inner wall of the valve body 1 between the packing press ring 16 and the sealing cover 17, a limiting block 19 is arranged in the limiting groove 18, the limiting block 19 is movably connected with the packing press ring 16, a first fastening bolt 20 is arranged on the valve cover 2 and the sealing cover 17, and a first fastening nut 21 is arranged on the first fastening bolt 20 above the sealing cover 17. In the use, wearing and tearing appear and take place to reveal in first packing sealing ring 15, then can screw up first fastening nut 21 and impel valve gap 2 to move towards sealed lid 17 direction, and packing clamping ring 16 under stopper 19 is spacing impels first packing sealing ring 15 to warp once more and realizes sealedly once more. The number of the limiting grooves 18 is a plurality, the limiting grooves 18 are uniformly distributed on the outer side of the valve rod 3 in a star shape, and the number of the limiting blocks 19 corresponds to the number of the limiting grooves 18. The number of the limiting grooves 18 is preferably four, five or six.

1 top of valve body be provided with go-between 22, be provided with the spacing slide bar 23 that parallels with valve rod 3 on the go-between 22, be provided with connecting plate 24 on spacing slide bar 23 and the valve rod 3, connecting plate 24 is convenient for install the drive arrangement of valve rod on connecting plate 24, valve rod 3 activity suit is on connecting plate 24, connecting plate 24 is installed at the top of spacing slide bar 23, be provided with limiting plate 25 on spacing slide bar 23 and the valve rod 3, limiting plate 25 adopts the platelike structure that can be sliding motion along the top of spacing slide bar 23 to the bottom of spacing slide bar 23, limiting plate 25 fixed mounting is on valve rod 3, limiting plate 25 activity suit is on spacing slide bar 23. By means of the characteristic that the limiting plate 25 is installed on the valve rod 3, the limiting plate 25 performs sliding motion on the limiting slide rod 23, and further position limitation is performed on the valve rod 3 in the opening and closing processes of the valve rod 3.

The top of the packing gland 12 is provided with a packing pressure plate 26, the top of the valve cap 2 is provided with a connecting wing plate 27, the connecting wing plate 27 is hinged with the bottom end of a second fastening bolt 28, the packing pressure plate 26 is movably sleeved on the second fastening bolt 28, and a second fastening nut 29 is arranged on the second fastening bolt 28 above the packing pressure plate 26.

The use method of the product is as follows: as shown in fig. 1 to 4, before the opening of the shutter 4, the shutoff valve 9 on the decompression pipe 8 should be opened; then, valve rod 3 drive flashboard 4 upwards moves gradually to predetermineeing the open mode position, flashboard 4 is in the open mode this moment, at flashboard 4 upward movement's in-process, from laminating to breaking away from the connection mutually between first enhancement sealing ring 6 and the second enhancement sealing ring 7, because first enhancement sealing ring 6 of this product and second enhancement sealing ring 7 all adopt the cyclic annular structure of being made by Stellite cobalt chromium tungsten alloy, it is higher for traditional austenitic stainless steel wearing resistance, the durability of first enhancement sealing ring 6 and second enhancement sealing ring 7 has been improved.

In the closing process of the gate plate 4, the valve rod 3 drives the gate plate 4 to gradually move downwards, and when the first reinforcing sealing ring 6 and the second reinforcing sealing ring 7 are completely attached, the closed state position of the gate plate 4 is reached; then, the shut-off valve 9 on the pressure reducing pipe 8 is closed, and the product is in a closed state.

Through this embodiment, through being linked together and install stop valve 9 on the decompression pipe 8 through the decompression pipe 8 with the 1 inner chamber of valve body of flashboard 4 both sides, at the opening process of flashboard 4 and the closed in-process of flashboard 4, stop valve 9 is in the open mode, and the effectual pressure differential that reduces the flashboard 4 both sides has reduced the frictional force between flashboard and the disk seat.

The utility model discloses a satisfy a high-pressure gate valve in valve field worker needs, make the utility model discloses extensive market prospect has.

Claims

1. The utility model provides a high-pressure gate valve, includes valve body (1), is provided with valve gap (2) on valve body (1), is provided with valve rod (3) on valve gap (2), is provided with flashboard (4) on the bottom of valve rod (3), equally divides in valve body (1) inner chamber of flashboard (4) both sides and do not sets up disk seat (5), its characterized in that: disk seat (5) be provided with first enhancement sealing ring (6) towards the one side of flashboard (4) on, first enhancement sealing ring (6) adopt the loop configuration who is made by Stellite-12# cobalt chromium tungsten alloy, flashboard (4) are provided with second enhancement sealing ring (7) towards the one side of disk seat (5), second enhancement sealing ring (7) and first enhancement sealing ring (6) swing joint, second enhancement sealing ring (7) adopt the loop configuration who is made by Stellite-6# cobalt chromium tungsten alloy, valve body (1) inner chamber of flashboard (4) both sides is linked together through decompression pipe (8), be provided with stop valve (9) on decompression pipe (8).

2. The high pressure gate valve of claim 1, wherein: the valve cover is characterized in that a valve rod sealing groove (10) is formed in the top of the valve cover (2), a packing gasket ring (11) is arranged on a valve rod (3) on the inner side of the valve rod sealing groove (10), the packing gasket ring (11), a packing gland (12) is arranged on the valve rod (3) above the packing gasket ring (11), and a second graphite sealing ring (13) and a third graphite sealing ring (14) are arranged in the valve rod sealing groove (10) between the packing gasket ring (11) and the packing gland (12).

3. The high pressure gate valve of claim 1, wherein: the valve cap (2) outside set gradually first packing sealing ring (15), pack clamping ring (16) and sealed lid (17), be provided with spacing groove (18) on valve body (1) inner wall between packing clamping ring (16) and sealed lid (17), be provided with stopper (19) in spacing groove (18), stopper (19) and packing clamping ring (16) swing joint, be provided with first fastening bolt (20) on valve cap (2) and sealed lid (17), be provided with first fastening nut (21) on first fastening bolt (20) of sealed lid (17) top.

4. The high pressure gate valve of claim 1, wherein: valve body (1) top be provided with go-between (22), be provided with spacing slide bar (23) that parallel with valve rod (3) on go-between (22), be provided with connecting plate (24) on spacing slide bar (23) and valve rod (3), valve rod (3) activity suit is on connecting plate (24), the top at spacing slide bar (23) is installed in connecting plate (24), be provided with limiting plate (25) on spacing slide bar (23) and valve rod (3), limiting plate (25) fixed mounting is on valve rod (3), limiting plate (25) activity suit is on spacing slide bar (23).

5. The high pressure gate valve of claim 2, wherein: the packing gland is characterized in that a packing pressure plate (26) is arranged at the top of the packing gland (12), a connecting wing plate (27) is arranged at the top of the valve cover (2), the connecting wing plate (27) is hinged with the bottom end of a second fastening bolt (28), the packing pressure plate (26) is movably sleeved on the second fastening bolt (28), and a second fastening nut (29) is arranged on the second fastening bolt (28) above the packing pressure plate (26).

6. The high pressure gate valve of claim 3, wherein: the number of the limiting grooves (18) is a plurality, the limiting grooves (18) are uniformly distributed on the outer side of the valve rod (3) in a star shape, and the number of the limiting blocks (19) corresponds to the number of the limiting grooves (18).

7. The high pressure gate valve of claim 2, wherein: a plurality of is adopted to the quantity of second graphite sealing ring (13) and third graphite sealing ring (14), and suit in proper order on valve rod (3) of valve rod seal groove (10) inboard along the direction of packing backing ring (11) to gland (12) in turn in a plurality of second graphite sealing ring (13) and a plurality of third graphite sealing ring (14).