CN111520492A - Parallel double-gate valve - Google Patents
Parallel double-gate valve Download PDFInfo
- Publication number
- CN111520492A CN111520492A CN202010476275.8A CN202010476275A CN111520492A CN 111520492 A CN111520492 A CN 111520492A CN 202010476275 A CN202010476275 A CN 202010476275A CN 111520492 A CN111520492 A CN 111520492A
- Authority
- CN
- China
- Prior art keywords
- flashboard
- valve
- extension spring
- wedge
- gate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/029—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with two or more gates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/16—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together
- F16K3/18—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
Abstract
The invention relates to a parallel double-gate-plate gate valve which comprises a valve body, a valve rod, gate plates and a valve seat, wherein a flow passage for fluid to pass through and a valve cavity which is positioned in the middle of the flow passage and used for lifting the gate plates are arranged in the valve body, the gate plates are respectively positioned on two sides of the valve cavity and are in sealing fit with the valve seat positioned at the joint of the flow passage and the valve cavity, the valve rod drives the gate plates to lift, the valve rod is provided with a transverse moving mechanism which moves the gate plates transversely towards the valve seat until the gate plates are in sealing fit when the gate plates are lifted to be opposite to the position of the. By adopting the scheme, the invention provides the parallel double-gate-plate gate valve which can prevent the lower end of the gate plate from inclining inwards to form a V-shaped structure, and the service life and the lifting smoothness are prolonged.
Description
Technical Field
The invention relates to the field of valves, in particular to a parallel double-gate-plate 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.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a parallel double-gate-plate gate valve which prevents the lower end of a gate plate from inclining inwards to form a V-shaped structure, prolongs the service life and improves the smoothness.
In order to achieve the purpose, the invention provides the 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 invention is further configured 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 invention is further configured 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 invention is further configured 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 invention is further configured 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 invention is further configured 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 invention is further configured 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 solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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 invention discloses a parallel double-gate valve, 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 towards the valve seat 4 until the gate plate 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 inwards when, 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 (7)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010476275.8A CN111520492A (en) | 2020-05-29 | 2020-05-29 | Parallel double-gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010476275.8A CN111520492A (en) | 2020-05-29 | 2020-05-29 | Parallel double-gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111520492A true CN111520492A (en) | 2020-08-11 |
Family
ID=71909079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010476275.8A Pending CN111520492A (en) | 2020-05-29 | 2020-05-29 | Parallel double-gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111520492A (en) |
-
2020
- 2020-05-29 CN CN202010476275.8A patent/CN111520492A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100439842C (en) | Upper sealer of trolley for circular refrigerator | |
| CN212251235U (en) | Parallel double-gate valve | |
| CN202418673U (en) | Flat gate valve | |
| CN207122606U (en) | A kind of upper dress formula fixing ball valve for being resistant to worst cold case | |
| CN111520492A (en) | Parallel double-gate valve | |
| CN101782328A (en) | Middle supporting type head-tail sealing device for sintering machine | |
| CN201351755Y (en) | All-welded valve body pipeline ball valve | |
| CN201359156Y (en) | High-voltage resistant precise rotary compensator | |
| CN208634427U (en) | Two way seal downstream valve seat sealing structure | |
| CN201991519U (en) | Double-pipe testing wellhead device | |
| CN108626558B (en) | Automatic lubrication device for steel wire rope for swabbing vehicle | |
| CN201057278Y (en) | Single seat regulating valve | |
| CN207195707U (en) | Without friction dilating type flat plate gate valve | |
| CN208565633U (en) | The valve rod and flap connection structure and globe valve of globe valve | |
| CN201875183U (en) | Top assembling type two dimensional half ball valve of valve seat | |
| CN205298609U (en) | No deposit ore pulp valve | |
| CN105318025A (en) | Double-disc wedge gate valve adopting composite spring connection | |
| CN211288770U (en) | Float ball type stop valve | |
| CN103867739A (en) | Straight-through type wedge gate valve | |
| CN211145393U (en) | Special knife-type gate valve of SOx/NOx control | |
| CN210714602U (en) | Water jacket furnace | |
| CN208778740U (en) | A kind of adjustable three eccentricity one-way valve seat orbit ball valve | |
| CN206816220U (en) | A kind of polished rod of pumping well self-lubricating protection device | |
| CN208381363U (en) | The LNG ultralow temperature top-loading ball valve for preventing valve base seal from sliding | |
| CN2336155Y (en) | Stop valve specially adapted for chloric acid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |