CN212251235U

CN212251235U - Parallel double-gate valve

Info

Publication number: CN212251235U
Application number: CN202020962290.9U
Authority: CN
Inventors: 苏永进; 苏浩杰
Original assignee: Zhejiang Advanced Technology Valve Co ltd
Current assignee: Zhejiang Advanced Technology Valve Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-12-29
Anticipated expiration: 2030-05-29

Abstract

The utility model relates to a run-in double gate disc gate valve, including the valve body, the valve rod, flashboard and disk seat, be provided with the runner that supplies the fluid to pass through in the valve body and be located the runner middle part and supply the valve pocket that the flashboard goes up and down, the flashboard be located the valve pocket both sides respectively and with the disk seat seal cooperation that is located runner and valve pocket junction, valve rod drive flashboard goes up and down, the valve rod is provided with and falls to when relative with the disk seat position with the flashboard to disk seat lateral shifting until sealed complex sideslip mechanism, be provided with the stop gear that prevents the flashboard lower extreme to incline to the inboard when. With the adoption of the scheme, the utility model provides an avoid flashboard lower extreme to inboard slope formation V type structure's run-in double gate board gate valve, increase of service life and lift smooth and easy nature.

Description

Parallel double-gate valve

Technical Field

The utility model relates to a valve field, concretely relates to run-in double gate disc gate valve.

Background

The parallel double-gate valve is mainly used for oil and natural gas transmission pipelines, oil product transmission pipelines and storage equipment, oil and natural gas exploitation wellhead devices and the like in the oil industry. The valves are generally used for key pipelines such as main steam cut-off and isolation, main water feed pump isolation, high-pressure heater isolation, steam turbine water delivery systems and the like in thermal power stations, and are used for controlling effective cut-off or opening of high-temperature and high-pressure steam-water media, and the reliability and safety of a unit are directly influenced by the pressure bearing performance, the sealing performance, the service life, the maintenance period and the like of the valves.

Traditional run-in double gate disc gate valve includes the valve body, the valve rod, flashboard and disk seat, be provided with the runner that supplies the fluid to pass through in the valve body and be located the runner middle part and supply the valve pocket that the flashboard goes up and down, the flashboard be located the valve pocket both sides respectively and with be located the sealed cooperation of the disk seat of runner with the valve pocket junction, the valve rod below is provided with the wedge, be provided with wedge cooperation piece between wedge and each flashboard respectively, valve rod drive flashboard descends to correspond the position back with the disk seat, the wedge promotes the flashboard side through wedge cooperation piece and moves until with sealed cooperation, flashboard drive valve rod rises, the corresponding disk seat messenger's sealed.

Firstly, the gate plate has certain quality, and the lower ends of the gate plates on two sides incline inwards due to gravity in the rising process of the gate plate to form a V-shaped state, wherein the V-shaped state not only influences the lifting stability, but also slightly inclines the upper end after the lower end of the gate plate inclines inwards, so that the abrasion between the upper end and the guide structure is aggravated, the service life is prolonged, and the lifting smoothness is influenced; secondly, when the flashboard ascends under the drive of the valve rod, the valve seat and the flashboard are still in a sealing matching state, the flashboard continuously ascends after retreating to the inner side due to the damping between the flashboard and the valve seat, the abrasion between the flashboard and the valve seat is aggravated by the damping, the service life of the flashboard and the valve seat is shortened, the sealing performance is reduced, and the opening and closing damping is increased.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide an avoid the flashboard lower extreme to inboard slope to form the parallel form double-disc gate valve of V type structure, increase of service life and lift smooth and easy nature.

In order to achieve the above purpose, the utility model provides a following technical scheme: including valve body, valve rod, flashboard and disk seat, the valve body in be provided with the runner that supplies the fluid to pass through and be located the runner middle part and supply the valve pocket that the flashboard goes up and down, the flashboard be located the valve pocket both sides respectively and with be located the sealed cooperation of disk seat of runner and valve pocket junction, valve rod drive flashboard go up and down and be provided with when the flashboard falls to with the disk seat position relative time with the flashboard to disk seat lateral shifting until sealed complex sideslip mechanism, its characterized in that: and limiting mechanisms for preventing the lower end of the flashboard from inclining inwards when the flashboard ascends are arranged between the flashboards on the two sides.

Through adopting above-mentioned technical scheme, add stop gear, prevent the flashboard lower extreme to the inboard slope to avoid forming V type structure because of the inboard slope, avoid flashboard upper end camber simultaneously, guarantee life and lift smooth and easy nature.

The utility model discloses further set up to: stop gear include spacing axle, both sides the flashboard respectively along transversely being provided with the spacing groove that the opening is relative, spacing axle along transversely setting up and the both ends spacing inslot that is located the flashboard of different sides respectively, spacing axle offset with the spacing groove cell wall when the flashboard lower extreme inclines to the inboard and constitutes spacing cooperation.

Through adopting above-mentioned technical scheme, select the spacing axle that is located between the spacing groove of flashboard, when the flashboard lower extreme has the trend of inboard slope, spacing axle can offset with spacing groove wall, prevents the emergence of slope to avoid the flashboard to form V type structure.

The utility model discloses further set up to: still include extension spring, extension spring along horizontal setting, extension spring both ends be located the spacing inslot of the flashboard of the different sides respectively and fixed mutually with the cell wall of spacing groove.

Through adopting above-mentioned technical scheme, before the valve rod rises, extension spring can increase the slide gate and move back the speed and the range of moving back that move back to the inboard, and the damping that does not rely on between slide gate and the disk seat moves back, guarantees that the slide gate rises before be in with disk seat non-contact state, avoids both to rise wearing and tearing of in-process, increase of service life guarantees sealing performance.

The utility model discloses further set up to: the groove wall of the limiting groove corresponds to the end part of the extension spring and is provided with an installation boss in a surrounding mode, and the inner side face of the installation boss is in threaded fit with the extension spring to form fixation of the installation boss and the extension spring.

Through adopting above-mentioned technical scheme, adopt screw-thread fit's mode with spacing groove and extension spring's fixed, improve the convenience of dismouting and maintenance.

The utility model discloses further set up to: the two ends of the limiting shaft are respectively provided with a limiting boss in a surrounding manner, a telescopic gap corresponding to the position of the extension spring is formed between the limiting bosses at the two ends, and the extension spring is fixed with one limiting boss.

By adopting the technical scheme, the telescopic gap is formed between the limiting bosses, so that the contact between the extension spring and the limiting pin is reduced as much as possible in the telescopic process, namely, the abrasion is reduced, the service life is prolonged, and the opening and closing damping is reduced.

The utility model discloses further set up to: the extension spring and the limiting boss are welded and fixed.

Through adopting above-mentioned technical scheme, adopt welded fixed mode, fixed reliability is better, fixed area is less, more is fit for the fixed between extension spring and the spacing boss.

The utility model discloses further set up to: the sideslip mechanism including being wedge complex wedge and wedge cooperation piece, the wedge be located the valve rod lower extreme, the quantity of wedge cooperation piece be two and be located respectively between flashboard and the wedge of both sides, the wedge be along transversely being provided with the mounting hole, both sides the flashboard be provided with stretch into the mounting hole and with the mounting hole in lateral shifting's erection column, the erection column be cavity form and hollow portion as the spacing groove.

Through adopting above-mentioned technical scheme, set up the mounting hole that supplies the erection column to stretch into on the wedge, set up the spacing groove on the erection column to make the spacing groove can set up in the position that the flashboard is close to the center, improve spacing effect.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is an enlarged view of a in fig. 1.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-2, the utility model discloses a parallel gate valve with double gate plates, which comprises a valve body 1, a valve rod 2, a gate plate 3 and a valve seat 4, wherein a flow passage 11 for fluid to pass through and a valve cavity 12 positioned in the middle of the flow passage 11 and used for lifting the gate plate 3 are arranged in the valve body 1, the gate plate 3 is respectively positioned at two sides of the valve cavity 12 and is in sealing fit with the valve seat 4 positioned at the joint of the flow passage 11 and the valve cavity 12, the valve rod 2 drives the gate plate 3 to lift and is provided with a transverse moving mechanism which moves the gate plate 3 transversely to the valve seat 4 until the gate plate 3 is in sealing fit when the gate plate 3 is lowered to the position opposite to the valve seat 4, a limiting mechanism which prevents the lower end of the gate plate 3 from inclining, thereby avoiding forming a V-shaped structure due to the inner side inclination, avoiding the outward inclination of the upper end of the flashboard 3 and ensuring the service life and the lifting smoothness.

Stop gear includes spacing axle 5, the flashboard 3 of both sides is respectively along transversely being provided with the relative spacing groove 31 of opening, spacing axle 5 is along transversely setting up and the both ends are located the spacing inslot 31 of the flashboard 3 of different sides respectively, spacing axle 5 offsets with spacing groove 31 cell wall when 3 lower extremes of flashboard incline to the inboard and constitutes spacing cooperation, select spacing axle 5 that is located between the spacing groove 31 of flashboard 3, when 3 lower extremes of flashboard have the trend of inclining to the inboard, spacing axle 5 can offset with spacing groove 31 cell wall, prevent the emergence of slope, thereby avoid flashboard 3 to form V type structure.

Still include extension spring 6, extension spring 6 is along horizontal setting, extension spring 6 both ends are located the spacing groove 31 of the flashboard 3 of different sides respectively and are fixed mutually with the cell wall of spacing groove 31, before valve rod 2 rises, extension spring 6 can increase 3 inboard speed and the range of moving back that move back of flashboard, and the damping that does not rely on between flashboard 3 and the disk seat 4 moves back, guarantee before the flashboard rises be in with disk seat 4 non-contact state, avoid both wearing and tearing of the in-process that rises, and long service life guarantees sealing performance.

The cell wall of spacing groove 31 corresponds and encircles with extension spring 6 tip and be provided with installation boss 311, is between the medial surface of installation boss 311 and the extension spring 6 and constitutes both fixed screw-thread fit, adopts screw-thread fit's mode with spacing groove 31 and extension spring 6's fixed, improves the convenience of dismouting and maintenance.

The two ends of the limiting shaft 5 are respectively provided with a limiting boss 51 in a surrounding mode, a telescopic gap 52 corresponding to the position of the extension spring 6 is formed between the limiting bosses 51 at the two ends, the extension spring 6 is fixed with one limiting boss 51, and a telescopic gap is formed between the limiting bosses 51, so that the extension spring 6 is in contact with a limiting pin in the telescopic process as much as possible, namely, the abrasion is reduced, the service life is prolonged, and opening and closing damping is reduced.

The extension spring 6 and the limiting boss 51 are welded and fixed, the fixing reliability is good, the fixing area is small due to the adoption of a welding fixing mode, the fixing device is more suitable for fixing the extension spring 6 and the limiting boss 51, and the position a in the attached drawing is a welding spot.

The transverse moving mechanism comprises wedge blocks 7 and wedge matching blocks 8 which are in wedge matching, the wedge blocks 7 are located at the lower end of the valve rod 2, the number of the wedge matching blocks 8 is two, the two wedge matching blocks are respectively located between the flashboards 3 and the wedge blocks 7 on the two sides, the wedge blocks 7 are transversely provided with mounting holes 71, the flashboards 3 on the two sides are provided with mounting columns 32 which extend into the mounting holes 71 and transversely move in the mounting holes 71, the mounting columns 32 are hollow and serve as limiting grooves 31, the mounting holes 71 for the mounting columns 32 to extend into are formed in the wedge blocks 7, the limiting grooves 31 are arranged on the mounting columns 32, therefore, the limiting grooves 31 can be arranged at positions, close to the centers, of the flashboards 3, the limiting effect is improved, wedge matching surfaces are arranged between the wedge blocks 7 and the wedge matching blocks 8, when the wedge blocks 7 descend, the wedge matching blocks 8 can be in contact with limiting points 121 at the bottoms of the valve cavities 12, wedge fitting surface extrusion wedge cooperation piece 8 makes flashboard 3 move to disk seat 4 until sealed cooperation, and when wedge 7 rose in-process, the wedge fitting surface kept away from wedge fitting piece 8 and formed the space of moving back, above-mentioned extension spring 6 then avoid the formation in space of should moving back, make wedge fitting piece 8 move back along with wedge fitting piece 8, even flashboard 3 cancelled sealed cooperation with disk seat 4 before rising.

In addition, the sealing surface of the flashboard 3 and the valve seat 4 can be made of wear-resistant and corrosion-resistant materials, so that the service life under high temperature and high pressure is prolonged.

Claims

1. The utility model provides a run-in double gate board gate valve, includes valve body, valve rod, flashboard and disk seat, the valve body in be provided with the runner that supplies the fluid to pass through and be located the runner middle part and supply the valve pocket that the flashboard goes up and down, the flashboard be located the valve pocket both sides respectively and with the disk seat that is located runner and valve pocket junction seal cooperation, valve rod drive flashboard go up and down, the valve rod be provided with when the flashboard falls to relative time with the disk seat position with the flashboard to disk seat lateral shifting mechanism up to seal the complex, its characterized in that: and limiting mechanisms for preventing the lower end of the flashboard from inclining inwards when the lower end of the flashboard ascends are arranged between the flashboards on the two sides.

2. The parallel double gate valve of claim 1, wherein: stop gear include spacing axle, both sides the flashboard respectively along transversely being provided with the spacing groove that the opening is relative, spacing axle along transversely setting up and the both ends spacing inslot that is located the flashboard of different sides respectively, spacing axle offset with the spacing groove cell wall when the flashboard lower extreme inclines to the inboard and constitutes spacing cooperation.

3. The parallel double gate valve of claim 2, wherein: still include extension spring, extension spring along horizontal setting, extension spring both ends be located the spacing inslot of the flashboard of the different sides respectively and fixed mutually with the cell wall of spacing groove.

4. The parallel double gate valve of claim 3, wherein: the groove wall of the limiting groove corresponds to the end part of the extension spring and is provided with an installation boss in a surrounding mode, and the inner side face of the installation boss is in threaded fit with the extension spring to form fixation of the installation boss and the extension spring.

5. The parallel double gate valve of claim 3, wherein: the two ends of the limiting shaft are respectively provided with a limiting boss in a surrounding manner, a telescopic gap corresponding to the position of the extension spring is formed between the limiting bosses at the two ends, and the extension spring is fixed with one limiting boss.

6. The parallel double gate valve of claim 3, wherein: the extension spring and the limiting boss are welded and fixed.

7. The parallel double gate valve of claim 2, wherein: the sideslip mechanism including being wedge complex wedge and wedge cooperation piece, the wedge be located the valve rod lower extreme, the quantity of wedge cooperation piece be two and be located respectively between flashboard and the wedge of both sides, the wedge be along transversely being provided with the mounting hole, both sides the flashboard be provided with stretch into the mounting hole and with the mounting hole in lateral shifting's erection column, the erection column be cavity form and hollow portion as the spacing groove.