CN110566682A - dislocation formula decompression gate valve that wear-resistants - Google Patents
dislocation formula decompression gate valve that wear-resistants Download PDFInfo
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- CN110566682A CN110566682A CN201910895833.1A CN201910895833A CN110566682A CN 110566682 A CN110566682 A CN 110566682A CN 201910895833 A CN201910895833 A CN 201910895833A CN 110566682 A CN110566682 A CN 110566682A
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- gate plate
- screw rod
- gate
- valve body
- plate
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- 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
- F16K3/0227—Packings
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- 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
- F16K3/0254—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 being operated by particular means
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- 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
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- 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
- F16K3/12—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 wedge-shaped arrangements of sealing faces
- F16K3/14—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 wedge-shaped arrangements of sealing faces with special arrangements for separating the sealing faces or for pressing them together
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- 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
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- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
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- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
Abstract
the invention provides a dislocation type pressure-reducing wear-resistant gate valve which comprises an upper valve body and a lower valve body which are communicated in a sealing manner, wherein a valve cavity is formed inside the upper valve body and the lower valve body, a flow channel for medium circulation is formed in the lower valve body, the dislocation type pressure-reducing wear-resistant gate valve also comprises a multi-plate gate valve mechanism, a sealing ring, a lifting driving mechanism and an elastic resetting component, the traditional integrated gate plate is arranged in a split manner, so that side gate plates on two sides are expanded from the middle to two sides in the sealing process and are inserted between the sealing rings, the sealing rings drive the sealing rings to be twisted towards the side gate plates by the expanding force of the side gate plates, the side gate plates are tightly held to form sealing, the sealing property of the gate plates is improved, meanwhile, the abrasion of the gate plates and the sealing rings is avoided, and the technical problems that the sealing rings are.
Description
Technical Field
the invention relates to the technical field of gate valves, in particular to a staggered pressure-reducing wear-resistant gate valve.
Background
The opening and closing piece of gate valve is the flashboard, the direction of motion of flashboard is mutually perpendicular with the fluid direction, the gate valve only can be made full open and close, can not do regulation and throttle, the flashboard of gate valve is along with the valve rod is linear motion, called the lifter gate valve, and when making the flashboard and carry out the lifting switch, relative movement takes place between flashboard and the valve body and wearing and tearing appear, after the valve uses a period, because wearing and tearing, can lead to the leakproofness of valve to go wrong, and because wearing and tearing appear simultaneously in valve body and flashboard, in the repair process, the restoration degree of difficulty improves.
Patent document CN201610680001.4 discloses a plate gate valve, it includes valve body, valve rod, with the inside both sides passway mutually sealed setting of valve body disk seat, be located between the disk seat of both sides and set up valve plate on the valve rod and be used for driving the valve rod and rotate around self axis and make the actuating mechanism that the valve plate oscilaltion moved and intercept or open the passageway, wherein the disk seat has the seat body with the through-hole that is linked together with the passageway including inside, the valve rod constitutes the screw-nut structure with the valve plate, especially, the disk seat still including be located the inside mounting groove that sets up around its circumference of seat body, set up in the mounting groove make disk seat and passway mouth junction have the tension ring that rises trend.
although, above-mentioned patent makes the leakproofness of disk seat and valve body strong through setting up the tight ring that rises, still have the impact force that the in-process of flashboard lift produced in the use and make the sealing washer take place to twist reverse the outwards turn-up influence leakproofness, and can cause the serious problem of wearing and tearing for a long time.
disclosure of Invention
Aiming at the problems, the invention provides a staggered pressure-reducing wear-resistant gate valve, which is characterized in that a traditional integrated gate plate is arranged in a split manner, so that side gate plates on two sides expand from the middle to two sides in the sealing process and are inserted between sealing rings, the sealing rings drive the sealing rings to twist towards the side gate plates by the expanding force of the side gate plates, the side gate plates are tightly held to form sealing, the sealing property of the gate plates is improved, meanwhile, the abrasion of the gate plates and the sealing rings is avoided, and the technical problems that the sealing rings twist and turn outwards due to the lifting of the gate plates and the sealing property of the gate valve is reduced are solved.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a dislocation formula decompression gate valve that wear-resistants, includes the last valve body and the lower valve body of sealed intercommunication, go up the inside formation valve pocket of valve body and lower valve body, just be provided with the runner that supplies the medium circulation on the lower valve body, still include:
The multi-plate gate valve mechanism is arranged in the valve cavity in a lifting mode along the vertical direction and comprises a middle gate plate and side gate plates, wherein the middle gate plate is arranged in a wedge shape, the side gate plates are symmetrically arranged on two sides of the middle gate plate and arranged in a right trapezoid shape, the middle gate plate and the side gate plates are spliced in an inserting mode to form a complete gate plate, and when the middle gate plate is spliced with the side gate plates, the side gate plates slide and expand towards the circumferential direction of the flow channel to two sides and are abutted against the side wall of the valve cavity for sealing;
the sealing rings are annular, are embedded on the side wall of the valve cavity of the lower valve body, are coaxially arranged with the runner and are symmetrically provided with two groups, are respectively arranged at the inlet and the outlet of the runner, and are in friction extrusion fit with the multi-plate gate valve mechanism;
the lifting driving mechanism comprises an outer screw rod assembly, an inner screw rod assembly, a driving assembly and a switching assembly, the outer screw rod assembly is vertically arranged on a support above the upper valve body and penetrates through the upper valve body to be connected with the side gate plate, the inner screw rod assembly is vertically arranged on the support and penetrates through the upper valve body to be connected with the middle gate plate, the driving assembly is horizontally arranged on the support and drives the corresponding side gate plate to be lifted and arranged through the outer screw rod assembly and drives the corresponding middle gate plate to be lifted and arranged through the inner screw rod assembly, the switching assembly is arranged at the top of the support and switches the driving assembly to be in transmission connection with the outer screw rod assembly and the inner screw rod assembly; and
The elastic reset assembly is symmetrically arranged and provided with two groups, the elastic reset assembly is arranged on two side arms in the length direction of the upper valve body and is respectively abutted against the side gate plates corresponding to the two side arms, and the side gate plates are pushed to be close to the middle of the upper valve body.
As an improvement, the middle gate plate and the side gate plate are provided with semicircular grooves at the positions where the side walls of the valve cavity abut against each other, the valve cavity is provided with semicircular sealing strips at the positions where the middle gate plate and the side gate plate abut against and are in sealing fit with each other, and the radius R1 of each groove and the radius R2 of each sealing strip meet the following requirements: r1 ═ 0.95 × R2.
As an improvement, the parts of the middle flashboard and the side flashboards which are inserted and matched are respectively provided with a convex rib and a concave groove which are correspondingly matched.
As an improvement, the top of the side gate plate is connected with the outer screw rod assembly through a connecting block, a sliding groove and a sliding rail which are in sliding fit are respectively arranged at the positions where the side gate plate is matched with the connecting block, and an opening for the middle gate plate to pass through is formed in the middle of the connecting block.
As an improvement, the relationship between the distance L between the symmetrically arranged seal rings and the thickness D of the multi-plate gate valve mechanism satisfies: 0.95 × L ═ D.
As an improvement, the outer lead screw assembly comprises:
the outer screw rod is vertically and rotatably arranged on the bracket, the lower end part of the outer screw rod is connected with the side gate plate, and the inner part of the outer screw rod is hollow; and
an outer lead screw nut; the outer lead screw nut is sleeved on the outer lead screw, is axially fixed and freely rotates in the circumferential direction, and a first key groove is formed in the outer circumferential side wall of the outer lead screw nut.
as an improvement, the internal screw rod assembly comprises:
the inner screw rod and the outer screw rod are coaxially arranged in the hollow interior of the outer screw rod, the lower end part of the inner screw rod is connected with the middle flashboard, and the upper end part of the inner screw rod penetrates through the outer screw rod and is arranged above the outer screw rod; and
the inner lead screw nut is sleeved on the inner lead screw and located right above the outer lead screw nut, the axis of the inner lead screw nut is fixed, the inner lead screw nut rotates freely in the circumferential direction, and a second key groove is formed in the outer circumferential side wall of the inner lead screw nut.
As an improvement, the drive assembly comprises:
The driven bevel gear is sleeved on the outer side of the outer lead screw nut, and a third key groove is formed in the circumferential side wall of the driven bevel gear;
The driving bevel gear is arranged on one side of the driven bevel gear and meshed with the driven bevel gear; and
And the driving motor is arranged on the bracket and drives the driving bevel gear to rotate.
as an improvement, the switching assembly comprises:
the switching cylinder is vertically arranged at the top of the bracket and is pushed downwards vertically;
The connecting ring is hung on the pushing end of the switching cylinder through a connecting rod, is coaxially arranged with the outer screw rod, and is provided with an annular sliding limiting groove; and
the shifting fork is arranged in an inverted L shape and comprises a buckling part buckled with the sliding limiting groove and a flat key part arranged in the third key groove in a sliding manner.
As a refinement, the elastic reset component comprises;
The shell is fixedly arranged on the upper valve body, penetrates through the side wall of the upper valve body and is arranged in a hollow mode;
the elastic column is fixedly arranged in the shell and points to the side gate plate; and
the kicking block resets, the kicking block resets with the elasticity post is directional the one end fixed connection of limit flashboard, and its directional one side of limit flashboard is provided with triangular's top, and this top extrusion limit flashboard.
The system of the invention has the advantages that:
(1) According to the invention, the traditional integrated flashboards are arranged in a split manner, so that the side flashboards on two sides expand from the middle to two sides in the sealing process and are inserted between the sealing rings, the sealing rings drive the sealing rings to twist towards the side flashboards by the expanding force of the side flashboards, the side flashboards are tightly held to form sealing, the sealing property of the flashboards is improved, and meanwhile, the flashboards and the sealing rings are prevented from being worn;
(2) according to the invention, the side gate plates are expanded from the middle to the two sides to be abutted and sealed with the side walls of the valve cavity, so that the abrasion between the side gate plates and the side walls can be effectively reduced, the sealing property between the side gate plates and the side walls is improved, and the service lives of the side gate plates and the valve cavity are prolonged;
(3) according to the invention, the semicircular grooves are arranged on the edges of the middle flashboard and the side flashboards, which are abutted against the valve cavity, and the semicircular sealing strips matched with the grooves are arranged on the valve cavity, so that secondary sealing is formed in the valve cavity by utilizing the extrusion between the grooves and the sealing strips, and the sealing property of the gate valve is improved;
(4) according to the invention, the convex ribs and the grooves are arranged at the matched slope positions of the middle gate plate and the side gate plates, and the middle gate plate and the side gate plates are spliced by utilizing the matching of the convex ribs and the grooves, so that a complete gate plate is formed to block and seal a flow channel, and the medium pressure in the flow channel is prevented from acting on the spliced positions of the middle gate plate and the side gate plates to cause leakage;
(5) According to the invention, the driving components are switched to be in transmission connection with the middle flashboard and the side flashboards through the switching components, so that the driving components respectively drive the middle flashboards and the side flashboards to ascend and descend in sequence, two groups of driving components are prevented from being arranged to respectively drive the middle flashboards and the side flashboards, and the structure of the gate valve is simplified.
In conclusion, the gate valve has the advantages of high sealing performance, wear resistance of the gate plate and the valve body, long service life and the like, and is particularly suitable for the technical field of gate valves.
Drawings
FIG. 1 is a first schematic cross-sectional view of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is a schematic cross-sectional view of the present invention;
FIG. 4 is a schematic view of the side gate of the present invention in an expanded state;
FIG. 5 is a schematic diagram of a locking structure of the sealing ring according to the present invention;
FIG. 6 is a schematic cross-sectional structural view of the multi-plate gate valve mechanism of the present invention;
FIG. 7 is an enlarged view of the structure at B in FIG. 6;
FIG. 8 is an enlarged view of the structure at C in FIG. 6;
FIG. 9 is a schematic perspective view of the side gate of the present invention;
FIG. 10 is a schematic perspective view of a connecting block according to the present invention;
FIG. 11 is a perspective view of the shutter of the present invention;
FIG. 12 is a schematic cross-sectional view of the lift drive mechanism of the present invention;
FIG. 13 is a schematic view of the lift drive mechanism of the present invention in partial cross-section;
FIG. 14 is a schematic view of a shift fork according to the present invention;
FIG. 15 is a perspective view of the internal screw nut of the present invention;
FIG. 16 is a cross-sectional view of an attachment ring in accordance with the present invention;
FIG. 17 is a perspective view of the fork of the present invention;
Fig. 18 is an enlarged schematic view of fig. 1 at a.
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.
in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example 1:
as shown in fig. 1 to 5, a staggered pressure-reducing wear-resistant gate valve includes an upper valve body 1 and a lower valve body 2 which are hermetically communicated, a valve cavity 3 is formed inside the upper valve body 1 and the lower valve body 2, and a flow passage 21 for medium to flow is provided on the lower valve body 2, further including:
the multi-plate gate valve mechanism 4 is vertically arranged in the valve cavity 3 in a lifting manner, and comprises a middle gate plate 41 in a wedge-shaped arrangement and side gate plates 42 symmetrically arranged on two sides of the middle gate plate 41 and arranged in a right trapezoid manner, the middle gate plate 41 and the side gate plates 42 are spliced in an inserting manner to form a complete gate plate, and when the middle gate plate 41 is spliced with the side gate plates 42, the side gate plates 42 slide and expand towards the annular direction of the runner 21 to two sides to be abutted against the side walls of the valve cavity 3 for sealing;
The sealing rings 5 are annular, are embedded on the side wall of the valve cavity of the lower valve body 2, are coaxially arranged with the runner 21, and are symmetrically provided with two groups, the sealing rings 5 are respectively arranged at the inlet and the outlet of the runner 21, and the sealing rings 5 are in friction extrusion fit with the multi-plate gate valve mechanism 4;
a lifting driving mechanism 6, wherein the lifting driving mechanism 6 comprises an outer screw rod component 61, an inner screw rod component 62, a driving component 63 and a switching component 64, the outer screw rod assembly 61 is vertically installed on the bracket 60 above the upper valve body 1, which penetrates the upper valve body 1 to be connected with the side gate plate 42, the inner screw assembly 62 is vertically installed on the bracket 60, which penetrates the upper valve body 1 to be connected with the middle gate plate 41, the driving assembly 63 is horizontally installed on the bracket 60, the outer screw rod assembly 61 drives the corresponding side gate plate 42 to be arranged in a lifting way, the inner screw rod assembly 62 drives the corresponding middle gate plate 41 to be arranged in a lifting way, the switching assembly 64 is arranged at the top of the bracket 60, and the driving assembly 63 is switched to be in transmission connection with the outer lead screw assembly 61 and the inner lead screw assembly 62; and
the elastic reset component 7, the elastic reset component 7 symmetry sets up and is provided with two sets ofly, its set up in on the length direction both sides arm of going up valve body 1, and it respectively with correspond limit flashboard 42 is contradicted, and promotes this limit flashboard 42 to the middle part of going up valve body 1 draws close.
Further, the relationship between the distance L between the symmetrically arranged seal rings 5 and the thickness D of the multi-plate gate valve mechanism 4 satisfies: 0.95 × L ═ D.
it should be noted that the difference between the gate plate of the present invention and the conventional gate valve is that the gate plate of the present invention is provided with a split type arrangement, the side gate plate 42 is lowered to the flow passage 21, then the middle gate plate 41 is lowered to the flow passage 21, and during the lowering process of the middle gate plate 41, the middle gate plate 41 presses the side gate plate 42, so that the side gate plate 42 moves from the center to both sides, the side gate plate 42 moves with the density ring 5 in the horizontal direction, and finally abuts against the side wall of the valve cavity 3, wherein it is worth emphasizing that during the raising and lowering movement of the side gate plate 42, the side gate plate is in a state of always contacting with the sealing ring 5, even if the side gate plate 42 is raised to the highest position, the lower end portion thereof is located between the two groups of sealing rings 5, and the distance of the side gate plate 42 moving to both sides is not very large, but only 1-3cm, but it is ensured that the side, while providing a tightening and twisting force to the sealing ring 5.
It is further described that the sealing ring 5 is made of a material having corrosion resistance, high temperature resistance and slight elastic deformation, preferably polytetrafluoroethylene, and in the process of moving the side gate plate 42 to the density ring 5, the side gate plate 42 drives the density ring 5 to twist towards the side where the side gate plate 42 contacts by means of a horizontally expanding force, the density ring 5 holds the side gate plate 42 tightly to seal the side gate plate 42, and the abrasion degree with the density ring 5 in the process of horizontally moving and expanding the side gate plate 42 is lighter than that of a traditional gate plate in the process of lifting and moving and the abrasion degree of the sealing ring, because, when the side gate plate 42 is horizontally expanded, an outward twisting stress counteracting part originally caused by the falling of the side gate plate 42 is eliminated by the expanding force, the outward twisting of the sealing ring 5 is eliminated, the side gate plate 42 is inwardly held tightly, and impurities in the medium at the inlet end of the flow channel 21 are prevented from being under the action of medium pressure, deposits are formed at the outward twisted portion of the seal ring 51, and cause great wear in the next shutter lifting.
In addition, it should be emphasized that, in the present invention, when the gate valve is opened, the middle gate plate 41 is lifted upwards first, and then the side gate plate 42 is lifted, and by arranging the gate plates separately, the pressure of the opening medium at the valve plate can be reduced when the gate valve is opened, so as to avoid the deformation of the valve plate.
as shown in fig. 6 and 7, as a preferred embodiment, semicircular grooves 411 are provided at the portions where the middle gate plate 41 and the side gate plate 42 abut against the side walls of the valve cavity 3, semicircular sealing strips 32 are provided at the portions where the valve cavity 3 abuts against and is in sealing fit with the middle gate plate 41 and the side gate plate 42, and the radius R1 of the groove 411 and the radius R2 of the sealing strips 32 satisfy: r1 ═ 0.95 × R2.
it should be noted that, in order to further improve the sealing performance of the gate valve, the sealing strips 32 are arranged in the valve cavity 3 to be matched with the grooves 411 on the middle gate plate 41 and the side gate plate 42, and the sealing strips 32 are extruded and deformed to be filled in the grooves 411 through the extrusion of the middle gate plate 41 and the side gate plate 42, so as to form secondary sealing.
as shown in fig. 8 to 11, as a preferred embodiment, the portions where the middle gate plate 41 and the side gate plate 42 are inserted and engaged are respectively provided with a rib 412 and a groove 421 which are correspondingly engaged.
Further, the top of the side gate plate 42 is connected to the outer lead screw assembly 61 through a connecting block 43, a sliding groove 422 and a sliding rail 431 which are in sliding fit are respectively arranged at positions where the side gate plate is matched with the connecting block 43, and an opening 432 through which the middle gate plate 41 passes is formed in the middle of the connecting block 43.
it should be noted that, when the middle gate plate 41 is inserted downward between the two sets of side gate plates 42, the slope surfaces of the wedge-shaped middle gate plate 41 and the slope surfaces of the side gate plates 42 are matched, so that the side gate plates 42 move to both sides along the slide rails 431, and the side gate plates 42 and the middle gate plate 41 are spliced by the matching of the ribs 412 and the grooves 421, so that the spliced joint can be covered, the strength of the spliced part can be enhanced, and the high-pressure of the medium in the flow passage 21 can be resisted.
Further, the side gate 42 slides along the connecting block 43 by the arrangement of the sliding groove 422 and the sliding rail 431.
as shown in fig. 12 to 17, as a preferred embodiment, the outer lead screw assembly 61 includes:
an outer screw rod 611, wherein the outer screw rod 611 is vertically and rotatably arranged on the bracket 60, the lower end part of the outer screw rod 611 is connected with the side gate 42, and the inner part of the outer screw rod 611 is hollow; and
an outer lead screw nut 612; the outer lead screw nut 612 is sleeved on the outer lead screw 611, is axially fixed, and freely rotates in the circumferential direction, and a first key groove 613 is formed on the outer circumferential side wall of the outer lead screw nut 612.
Further, the internal screw assembly 62 includes:
the inner screw 621 and the outer screw 611 are coaxially arranged in the hollow interior of the outer screw 611, the lower end part of the inner screw 621 is connected with the middle shutter 41, and the upper end part of the inner screw 621 penetrates through the outer screw 611 and is arranged above the outer screw 611; and
the inner lead screw nut 622 is sleeved on the inner lead screw 621, is located right above the outer lead screw nut 612, and is arranged when the axis of the inner lead screw nut 622 is fixed, the inner lead screw nut 622 freely rotates in the circumferential direction, and a second key groove 623 is formed in the outer circumferential side wall of the inner lead screw nut 622.
further, the driving assembly 63 includes:
the driven bevel gear 631 is sleeved outside the outer lead screw nut 612, and a third key groove 632 is formed in the circumferential side wall of the driven bevel gear 631;
a drive bevel gear 633, the drive bevel gear 633 being disposed at one side of the driven bevel gear 631, and engaging with the driven bevel gear 631; and
a driving motor 634, wherein the driving motor 634 is mounted on the carrier 60 and drives the drive bevel gear to rotate.
wherein the switching assembly 64 comprises:
a switching cylinder 641, wherein the switching cylinder 641 is vertically installed at the top of the bracket 60 and pushes vertically downward;
the connecting ring 642 is hung on the pushing end of the switching cylinder 641 through a connecting rod, is coaxial with the outer screw rod 611, and is provided with an annular sliding limiting groove 643; and
a shifting fork 644, wherein the shifting fork 644 is disposed in an inverted L shape, and includes a buckling portion 645 buckled with the sliding position-limiting groove 643 and a flat key portion 646 slidably disposed in the third key groove 632.
the side shutter 42 of the present invention is connected to the inner screw 621, and when the side shutter 42 needs to be lifted, the side shutter 42 is lowered by rotating the inner screw nut 622, and similarly, the middle shutter 41 is lifted by the same principle.
it is further noted that the driving assembly 63 drives the driven bevel gear 631 to rotate through the driving motor 634, and the driven bevel gear 631 is in transmission connection with the outer lead screw nut 612 or the inner lead screw nut 622 through the switching assembly 64, so that the outer lead screw nut 612 or the inner lead screw nut 622 rotates.
More specifically, the switching assembly 64 drives the shifting fork 644 to slide in the third key slot 632 through the switching cylinder 641, and when the shifting fork 644 is disposed in the second key slot 623 and the third key slot 632, the driven bevel gear 631 is in transmission connection with the inner lead screw nut 622, and when the shifting fork 644 is disposed in the first key slot 613 and the third key slot 632, the driven bevel gear 631 is in transmission connection with the outer lead screw nut 612.
in addition, it should be emphasized that, by calculation, the outer screw nut 612 and the inner screw nut 622 in the present invention rotate for a whole number of turns during the operation, that is, after the middle gate plate 41 and the side gate plate 42 are lifted to the right, the first key slot 613, the second key slot 623 and the third key slot 632 are always arranged in a collinear manner.
As shown in fig. 18, as a preferred embodiment, said elastic return assembly 7 comprises;
the outer shell 71 is fixedly arranged on the upper valve body 1, penetrates through the side wall of the upper valve body 1 and is internally hollow;
An elastic column 72, wherein the elastic column 72 is fixedly arranged in the outer shell 71 and points to the side gate plate 42; and
the resetting top block 73 is fixedly connected with one end, pointing to the side gate plate 42, of the elastic column 72, a triangular top 731 is arranged on one side, pointing to the side gate plate 42, of the resetting top block 73, and the triangular top 731 extrudes the side gate plate 42.
after the side shutter 42 is lifted, the elastic restoring member 7 abuts against the side shutter 42, and when the side shutter 42 is lowered again, the side shutter is restored to the middle, so that the side shutter 42 is expanded again to both sides when the middle shutter 41 is lowered.
the working process is as follows:
when the gate is opened, firstly, the driving assembly 63 is in transmission connection with the outer screw rod assembly 61 through the switching assembly 64, the side gate plate 42 is lowered through the driving assembly 63, it should be noted that the side gate plate 42 at this time is drawn close to the middle through the elastic resetting assembly 7, when the side gate plate 42 is lowered to the bottom, the driving assembly 63 is in transmission connection with the inner screw rod assembly 62 through the switching assembly 64, the middle gate plate 41 is lowered through the driving assembly 63, the side gate plate 42 is moved to two sides through the lowering of the middle plate 41, the sealing ring 5 is inwards twisted to tightly hold the side gate plate 42 through the movement of the side gate plate 42, meanwhile, the side gate plate 42 is abutted against the side wall of the valve cavity, and the groove 411 and the sealing strip 32 form secondary sealing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. the utility model provides a formula of staggering decompression wear-resisting gate valve, includes last valve body (1) and lower valve body (2) of sealed intercommunication, go up the inside formation valve pocket (3) of valve body (1) and lower valve body (2), just be provided with runner (21) that supply the medium circulation on lower valve body (3), its characterized in that still includes:
The gate valve mechanism (4) is arranged in the valve cavity (3) in a lifting mode along the vertical direction, and comprises a middle gate plate (41) arranged in a wedge shape and side gate plates (42) symmetrically arranged on two sides of the middle gate plate (41) and arranged in a right trapezoid mode, the middle gate plate (41) and the side gate plates (42) are spliced in a penetrating mode to form a complete gate plate, and when the middle gate plate (41) is spliced with the side gate plates (42), the side gate plates (42) slide and expand towards the circumferential direction of the runner (21) to two sides and are abutted against and sealed with the side walls of the valve cavity (3);
The sealing rings (5) are annular, are embedded on the side wall of the valve cavity of the lower valve body (2), are coaxially arranged with the runner (21), are symmetrically provided with two groups, are respectively arranged at the inlet and the outlet of the runner (21), and are in friction extrusion fit with the multi-plate gate valve mechanism (4);
The lifting driving mechanism (6) comprises an outer screw rod component (61), an inner screw rod component (62), a driving component (63) and a switching component (64), wherein the outer screw rod component (61) is vertically installed on a support (60) above the upper valve body (1), penetrates through the upper valve body (1) and is connected with the side gate plate (42), the inner screw rod component (62) is vertically installed on the support (60), penetrates through the upper valve body (1) and is connected with the middle gate plate (41), the driving component (63) is horizontally installed on the support (60), drives the corresponding side gate plate (42) to be lifted and arranged through the outer screw rod component (61), drives the corresponding middle gate plate (41) to be lifted and arranged through the inner screw rod component (62), and the switching component (64) is arranged at the top of the support (60), and switching the driving connection of the driving assembly (63) with the outer lead screw assembly (61) and the inner lead screw assembly (62); and
Elasticity reset assembly (7), elasticity reset assembly (7) symmetry sets up and is provided with two sets ofly, its set up in on the length direction both sides arm of last valve body (1), and its respectively with correspond limit flashboard (42) are contradicted, and promote this limit flashboard (42) to the middle part of going up valve body (1) is drawn close.
2. the stagger-moving type pressure-reducing wear-resistant gate valve according to claim 1, wherein the parts of the middle gate plate (41) and the side gate plate (42) abutting against the side wall of the valve cavity (3) are provided with semicircular grooves (411), the parts of the valve cavity (3) abutting against and in sealing fit with the middle gate plate (41) and the side gate plate (42) are provided with semicircular sealing strips (32), and the radius R1 of the grooves (411) and the radius R2 of the sealing strips (32) satisfy the following requirements: r1 ═ 0.95 × R2.
3. the stagger-moving type pressure-reducing wear-resistant gate valve according to claim 1, wherein the portions of the middle gate plate (41) and the side gate plate (42) which are inserted and matched are respectively provided with a rib (412) and a groove (421) which are correspondingly matched.
4. the stagger-moving type pressure-reducing wear-resistant gate valve according to claim 1, wherein the top of the side gate plate (42) is connected with the outer screw rod assembly (61) through a connecting block (43), a sliding groove (422) and a sliding rail (431) which are in sliding fit are respectively arranged at the positions where the side gate plate is matched with the connecting block (43), and an opening (432) for the middle gate plate (41) to pass through is formed in the middle of the connecting block (43).
5. A stagger-type pressure-reducing wear-resistant gate valve according to claim 1, wherein the relationship between the distance L between the symmetrically arranged sealing rings (5) and the thickness D of the multi-plate gate valve mechanism (4) is satisfied: 0.95 × L ═ D.
6. a stagger-type pressure reducing wear resistant gate valve according to claim 1, wherein the outer stem assembly (61) comprises:
the outer screw rod (611) is vertically and rotatably arranged on the bracket (60), the lower end part of the outer screw rod (611) is connected with the side gate plate (42), and the inner part of the outer screw rod (611) is hollow; and
an outer lead screw nut (612); the outer lead screw nut (612) is sleeved on the outer lead screw (611), is axially fixed and freely rotates in the circumferential direction, and a first key groove (613) is formed in the outer circumferential side wall of the outer lead screw nut (612).
7. A stagger-type pressure reducing wear resistant gate valve according to claim 6 wherein the inner wire rod assembly (62) comprises:
the inner screw rod (621) and the outer screw rod (611) are coaxially arranged in the hollow interior of the outer screw rod (611), the lower end part of the inner screw rod (621) is connected with the middle gate plate (41), and the upper end part of the inner screw rod (621) penetrates through the outer screw rod (611) and is arranged above the outer screw rod (611); and
Interior screw nut (622), interior screw nut (622) cover is located on interior lead screw (621), it is located directly over outer screw nut (612), and its axis sets up when fixed, and this interior screw nut (622) ring free rotation, and has seted up second keyway (623) on the outer circumference lateral wall of this interior screw nut (622).
8. a staggered pressure reducing wear resistant gate valve according to claim 6, wherein said drive assembly (63) comprises:
the driven bevel gear (631) is sleeved on the outer side of the outer lead screw nut (612), and a third key groove (632) is formed in the circumferential side wall of the driven bevel gear (631);
a driving bevel gear (633), wherein the driving bevel gear (633) is arranged at one side of the driven bevel gear (631) and is meshed with the driven bevel gear (631); and
a drive motor (634), the drive motor (634) being mounted on the carrier (60) and driving the drive bevel gear to rotate.
9. a staggered pressure relief wear resistant gate valve according to claim 8, wherein said switching assembly (64) comprises:
A switching cylinder (641) vertically installed on the top of the bracket (60) and vertically pushing downward;
The connecting ring (642) is hung on the pushing end of the switching cylinder (641) through a connecting rod, is coaxial with the outer screw rod (611), and is provided with an annular sliding limiting groove (643); and
The shifting fork (644) is arranged in an inverted L shape and comprises a buckling part (645) buckled with the sliding limiting groove (643) and a flat key part (646) arranged in the third key groove (632) in a sliding mode.
10. A staggered pressure relief wear resistant gate valve according to claim 1, wherein said resilient return assembly (7) comprises;
The shell (71), the shell (71) is fixedly arranged on the upper valve body (1), penetrates through the side wall of the upper valve body (1), and is arranged in a hollow manner;
An elastic column (72), wherein the elastic column (72) is fixedly arranged in the shell (71) and points to the side gate plate (42); and
Reset kicking block (73), reset kicking block (73) with elasticity post (72) point to the one end fixed connection of limit flashboard (42), and its point to one side of limit flashboard (42) is provided with triangle-shaped top (731), and this top (731) extrusion limit flashboard (42).
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| CN201910895833.1A CN110566682B (en) | 2019-09-21 | 2019-09-21 | Dislocation formula decompression gate valve that wear-resistants |
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| CN201910895833.1A CN110566682B (en) | 2019-09-21 | 2019-09-21 | Dislocation formula decompression gate valve that wear-resistants |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112392976A (en) * | 2020-10-16 | 2021-02-23 | 温州奇胜阀门制造有限公司 | One-way full-sealing concealed rod type knife gate valve with cover |
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| CN110566682B (en) | 2020-09-11 |
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