CN203146881U - Wedge-type parallel gate valve - Google Patents
Wedge-type parallel gate valve Download PDFInfo
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- CN203146881U CN203146881U CN 201320102396 CN201320102396U CN203146881U CN 203146881 U CN203146881 U CN 203146881U CN 201320102396 CN201320102396 CN 201320102396 CN 201320102396 U CN201320102396 U CN 201320102396U CN 203146881 U CN203146881 U CN 203146881U
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- flashboard
- valve
- valve rod
- shaped
- gate plate
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Abstract
The utility model relates to a wedge-type parallel gate valve comprising a valve body, a valve seat, a gate plate, a valve rod, a valve cover, a support and a driving device, wherein the gate plate has a parallel gate plate structure formed by a left gate plate and a right gate plate, the upper end of the valve rod is in threaded connection with the output shaft of the driving device through a valve rod nut, the lower end of the valve rod is connected with a wedge-shaped block, the left gate plate and the right gate plate are connected onto the valve rod through a gate plate frame, the inner side surfaces of the left gate plate and the right gate plate are provided with a wedging device matched with the wedge block, mainly the upper end of the wedge block is connected with an elastic plate, a T-shaped slot is arranged in the lower end surface of the valve rod, the valve rod is connected with the elastic plate on the wedge block through the T-shaped slot in a mutual matching manner, and the lower end of the valve rod is connected with a connection hole of the gate plate frame through a T-shaped joint at intervals. According to the wedge-type parallel gate valve disclosed by the utility model, the upper end of the wedge block is elastically connected with the valve rod, so that the change of a pressing force between the gate plate and the valve seat caused by high-temperature expansion and low-temperature retraction is automatically absorbed, and no-friction opening and closing of the gate plate is realized; the wedge-type parallel gate valve disclosed by the utility model has the advantages of reliable opening and closing, good sealing performance, long service life and the like; and the wedge-type parallel gate valve is suitable for gate valves of pipes under high temperature and high pressure working conditions.
Description
Technical field
The utility model relates to valve field, particularly about a kind of parallel gate valve.The utility model is applicable to the gate valve of high temperature and high pressure condition pipeline.
Background technique
Gate valve is a kind of the most frequently used valve, extensive use on various industrial piping systems, and its structure type is by one-board gate valve, Wedge gate valve, Parallel gate valve Parallel slide valve, wedge-type double-flashboard gate valve etc.One-board gate valve and Parallel gate valve Parallel slide valve rely on pressure medium to realize flashboard and valve base sealing, leak easily when pressure medium is low.Wedge gate valve and wedge-type double-flashboard gate valve utilize wedge shape flashboard or wedge-shaped blocks wedging both sides flashboard and valve seat to realize forced seal, have the better seal performance.Be the plate valve of ZL95226065.4 as the patent No., its structure is made up of valve body, valve seat, flashboard, valve rod, valve gap, operation piece and Sealing etc., flashboard is assembly parts, comprise voussoir, left and right flashboard, voussoir and left and right flashboard are formed sliding pair, form extending means, make in the valve opening and closing process, left and right flashboard is close to the sealing surface of seat throttle down, removes on again behind the sealing surface of lifting off a seat and opens valve.No activity rubbing action between the sealing pair, sealing surface is not easy to wear, and sealing is reliable.Its major defect is: voussoir and a left side, cooperate for sphenoid surface between the right flashboard, valve rod is connected for rigidly fixing with voussoir, in off position down, voussoir and a left side when temperature raises, between the right flashboard easily high temperature expand and wedge is dead, when temperature reduces, voussoir and a left side, because low temperature shrinks wedging power is descended between the right flashboard, reduce the seal pressure between flashboard and the valve seat, be prone to leakage, at the unlatching initial stage, voussoir with a left side, move under the right flashboard wedging state, a left side, right flashboard has the power that moves up, and makes a left side, produce bigger frictional force between right flashboard and the valve seat, sealing surface is produced wearing and tearing, its functional reliability and poor sealing performance, product is low working life.
Summary of the invention
The purpose of this utility model is the shortcoming that exists at prior art, and automatically calibrating sealing force when a kind of temperature variation is provided can discharge wedging power, the parallel gate valve of the wedging type of functional reliability height, good seal performance, long service life earlier during unlatching.
The technical solution of the utility model comprises valve body, valve seat, flashboard, valve rod, valve gap, support, drive unit, flashboard is formed the parallel type flashboard structure by left flashboard and right flashboard, the upper end of valve rod is threaded by Stem Mut with the output shaft of drive unit, the lower end is connected with voussoir, left side flashboard and right flashboard are connected on the valve rod by the flashboard frame, left side flashboard and right flashboard inner side surface have the wedging device that cooperatively interacts with voussoir, mainly be that the voussoir upper end connects elastic plate, the valve rod lower end surface is shaped on T-slot, valve rod is cooperatively interacted by T-slot and elastic plate on the voussoir and is connected, and the valve rod lower end is connected with the attachment hole gap of flashboard frame by T connector.
In above technological scheme, described wedging device is at the back side of left flashboard and the right flashboard circle centre position difference mounting spherical top heart.
In above technological scheme, described wedging device is that the inner side surface of the rectangular top heart is arc surface at the back side of left flashboard and the right flashboard circle centre position difference along continuous straight runs fixed installation rectangular top heart.
In above technological scheme, flashboard frame bottom is an annulus, be positioned at the valve rod axis both sides at circle ring inner wall and be shaped on annular convex shoulder respectively, symmetry is shaped on two breach on the annular convex shoulder circumference, be shaped on the outer groove with the mutual Spielpassung of annular convex shoulder on the cylindrical wall of left side flashboard and right flashboard respectively, symmetry is shaped on two breach on the chimb circumference of groove inboard outside, and the breach angle of annular convex shoulder equates with the chimb angle of outer groove inboard.
In above technological scheme, be shaped on the anti-rotation hole on flashboard frame and the flashboard respectively, stop pin and spring are installed in the anti-rotation hole of flashboard frame and flashboard.
The utility model advantage compared with prior art is: the voussoir upper end is connected with valve rod elasticity, elastic plate storage elasticity pretightening force on valve closing state lower wedge block, automatically the variation of impacting force between the flashboard that absorption high temperature expands and the low temperature contraction causes and the valve seat, from the normal moveout correction sealing force, voussoir expands dead with flashboard and leaks between flashboard and the valve seat during temperature reduction when preventing that temperature from raising; At the valve opening initial stage, at initial stage when namely valve rod rises, the elastic plate on the voussoir at first discharges the elasticity pretightening force, makes to discharge wedging power between voussoir and the flashboard, and being at this stage flashboard does not have stressed state of rest, makes flashboard not have friction and opens and closes.Have characteristics such as keying is reliable, good seal performance, long service life.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the schematic representation that interconnects between flashboard among the utility model Fig. 1, flashboard frame, valve rod, the voussoir.
Fig. 3 is the side structure schematic representation of voussoir among the utility model Fig. 1.
Fig. 4 is the structure schematic representation of left flashboard and right flashboard among the utility model Fig. 1.
Fig. 5 is the profile of flashboard frame among the utility model Fig. 1.
Embodiment
The parallel gate valve of wedging type as shown in Figure 1, comprise valve body 1, valve seat 2, flashboard, valve rod 4, valve gap 5, support 8, drive unit 9, flashboard is formed the parallel type flashboard structure by left flashboard 3 and right flashboard 14, the upper end of valve rod 4 is threaded by Stem Mut 10 with the output shaft of drive unit 9, the lower end is connected with voussoir 16, left side flashboard 3 and right flashboard 14 are connected on the valve rod 4 by flashboard frame 17, left side flashboard 3 and right flashboard 14 inner side surfaces have the wedging device that cooperatively interacts with voussoir 16, are provided with anti-rotation device between valve rod 4 and the support 8.As Fig. 2, shown in Figure 3, voussoir 16 upper ends connect elastic plate 21, valve rod 4 lower end surfaces are shaped on T-slot, valve rod 4 is cooperatively interacted by T-slot and elastic plate 21 on the voussoir 16 and is connected, valve rod 4 is connected with voussoir 16 elasticity, under the valve closing state, 4 pairs of elastic plates of valve rod 21 produce downward pressure elasticity power, when medium temperature reduced, the pressure elasticity power of elastic plate 21 pushed away voussoir 16 downwards, adjusts sealing force automatically, keep sealability, when medium temperature raise, voussoir was gone up the mobile pressure elasticity plate 21 that continues for 16 times, prevented that voussoir 16 and the rectangular top heart 15 from expanding dead.Valve rod 4 lower ends are connected with the attachment hole gap of flashboard frame 17 by T connector 22, this gap is as elastic plate 21 compressed elastic force Free up Memories, at the valve opening initial stage, elastic plate 21 returns are removed elastic force to the impacting force of flashboard, and the friction of flashboard and sealing surface of seat is opened and closed.Left side flashboard 3, right flashboard 14 sealing surfaces and valve seat 2 sealing surface weld deposit Hardmetal materials.
Described wedging device is at the back side of left flashboard 3 and the right flashboard 14 circle centre position difference mounting spherical top heart 15, make voussoir 16 and the arc surface of the sphere top heart 15 become point to contact, reduce the part processing difficulty, improved the uniformity of wedging state lower flashboard and valve seat 2 sealing surface circumferential sealing power.
Described wedging device is at the back side of left flashboard 3 and the right flashboard 14 circle centre position difference along continuous straight runs fixed installation rectangular top heart 15, the inner side surface of the rectangular top heart 15 is arc surface, described substantially horizontal refers on the direction with valve rod 4 axis normal, the described rectangular top heart 15 refers to the top heart along the rectangular that is projected as at left flashboard 3 and right flashboard 14 back sides, and the inner side surface of the described rectangular top heart 15 refers to the one side that contacts with voussoir 16 inclined-planes.The length of the rectangular top heart 15 is according to the size design of valve body 1 bore.
As Fig. 2, Fig. 4, shown in Figure 5, flashboard frame 17 bottoms are an annulus, be positioned at valve rod 4 axis both sides at circle ring inner wall and be shaped on annular convex shoulder 11 respectively, symmetry is shaped on two breach on annular convex shoulder 11 circumference, be shaped on the outer groove 20 with annular convex shoulder 11 mutual Spielpassung on the cylindrical wall of left side flashboard 3 and right flashboard 14 respectively, annular convex shoulder 11 and outer groove 20 gap value in the axial direction with satisfy left flashboard 3 and right flashboard 14 can freedom and valve seat 2 requirement that compresses sealing design, here said axial is valve body 1 channel centerline direction.Symmetry is shaped on two breach on chimb 12 circumference of groove 20 inboards outside, and the breach angle of annular convex shoulder 11 equates with chimb 12 angles of outer groove 20 inboards.Breach on annular convex shoulder 11 and chimb 12 circumference can adopt more than two, design principle is that the breach of annular convex shoulder 11 and the chimb 12 of left flashboard 3 and right flashboard 14 have corresponding position and angle same, make the chimb 12 of left flashboard 3 and right flashboard 14 insert installation from the indentation, there of flashboard frame 17 annular convex shoulders 11, the indentation, there of the chimb 12 of left flashboard 3 and right flashboard 14 being aimed at flashboard frame 17 annular convex shoulders 11 when namely installing is inserted, and rotates to the setting angle that needs then.
Be shaped on the anti-rotation hole on flashboard frame 17 and the flashboard respectively, stop pin 18 and spring 19 are installed in the anti-rotation hole of flashboard frame 17 and flashboard, when concentric with the anti-rotation hole of flashboard in the anti-rotation hole of flashboard frame 17, one end of stop pin 18 is pushed in the anti-rotation hole of flashboard by spring 19, and the other end prevents that flashboard from rotating at flashboard frame 17 in the anti-rotation hole of flashboard frame 17.
When the wedging device adopted the rectangular top heart 15, valve rod 4 axis were vertical with the long limit of the rectangular top heart 15 when concentric in anti-rotation hole and the anti-rotation hole of flashboard of flashboard frame 17, guarantee that valve rod 4 axis are vertical with the long limit of the rectangular top heart 15.
Valve gap 5 is installed in the valve body 1 by pendant collet 13, be provided with seal ring 6 between valve gap 5 outer walls and valve body 1 inwall, sealing ring 6 is installed between valve body 1 and the valve gap 5 by pressure ring, and the conical surface that seal ring 6 has downward inside trumpet mouth and valve gap 5 outer walls cooperatively interacts, and realizes valve body 1 lumen self-tightening sealing.Be provided with stuffing box packing 7 between valve gap 5 and the valve rod 4.
Claims (7)
1. parallel gate valve of wedging type, comprise valve body (1), valve seat (2), flashboard, valve rod (4), valve gap (5), support (8), drive unit (9), flashboard is formed the parallel type flashboard structure by left flashboard (3) and right flashboard (14), the upper end of valve rod (4) is threaded by Stem Mut (10) with the output shaft of drive unit (9), the lower end is connected with voussoir (16), left side flashboard (3) and right flashboard (14) are connected on the valve rod (4) by flashboard frame (17), left side flashboard (3) and right flashboard (14) inner side surface have the wedging device that cooperatively interacts with voussoir (16), it is characterized in that voussoir (16) upper end connects elastic plate (21), valve rod (4) lower end surface is shaped on T-slot, valve rod (4) is cooperatively interacted by T-slot and elastic plate (21) on the voussoir (16) and is connected, and valve rod (4) lower end is connected with the attachment hole gap of flashboard frame (17) by T connector (22).
2. the parallel gate valve of wedging type according to claim 1 is characterized in that described wedging device is at the back side of left flashboard (3) and right flashboard (14) the circle centre position difference mounting spherical top heart (15).
3. the parallel gate valve of wedging type according to claim 1, it is characterized in that described wedging device for fixedly mounting the rectangular top heart (15) at the back side of left flashboard (3) and right flashboard (14) circle centre position difference along continuous straight runs, the inner side surface of the rectangular top heart (15) is arc surface.
4. the parallel gate valve of wedging type according to claim 1 and 2, it is characterized in that flashboard frame (17) bottom is an annulus, be positioned at valve rod (4) axis both sides at circle ring inner wall and be shaped on annular convex shoulder (11) respectively, symmetry is shaped on two breach on annular convex shoulder (11) circumference, be shaped on the outer groove (20) with the mutual Spielpassung of annular convex shoulder (11) on the cylindrical wall of left side flashboard (3) and right flashboard (14) respectively, symmetry is shaped on two breach on chimb (12) circumference of groove (20) inboard outside, and the breach angle on the annular convex shoulder (11) equates with chimb (12) angle of outer groove (20) inboard.
5. according to claim 1 or the parallel gate valve of 3 described wedging types, it is characterized in that flashboard frame (17) bottom is an annulus, be positioned at valve rod (4) axis both sides at circle ring inner wall and be shaped on annular convex shoulder (11) respectively, symmetry is shaped on two breach on annular convex shoulder (11) circumference, be shaped on the outer groove (20) with the mutual Spielpassung of annular convex shoulder (11) on the cylindrical wall of left side flashboard (3) and right flashboard (14) respectively, symmetry is shaped on two breach on chimb (12) circumference of groove (20) inboard outside, and the breach angle on the annular convex shoulder (11) equates with chimb (12) angle of outer groove (20) inboard.
6. the parallel gate valve of wedging type according to claim 4 is characterized in that being shaped on the anti-rotation hole respectively on flashboard frame (17) and the flashboard, and stop pin (18) and spring (19) are installed in the anti-rotation hole of flashboard frame (17) and flashboard.
7. the parallel gate valve of wedging type according to claim 5 is characterized in that being shaped on the anti-rotation hole respectively on flashboard frame (17) and the flashboard, and stop pin (18) and spring (19) are installed in the anti-rotation hole of flashboard frame (17) and flashboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320102396 CN203146881U (en) | 2013-03-04 | 2013-03-04 | Wedge-type parallel gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320102396 CN203146881U (en) | 2013-03-04 | 2013-03-04 | Wedge-type parallel gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146881U true CN203146881U (en) | 2013-08-21 |
Family
ID=48974405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320102396 Expired - Fee Related CN203146881U (en) | 2013-03-04 | 2013-03-04 | Wedge-type parallel gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203146881U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090034A (en) * | 2013-01-18 | 2013-05-08 | 南方阀门制造有限公司 | Wedge-caulking parallel sluice valve |
| WO2018053665A1 (en) * | 2016-09-22 | 2018-03-29 | 陈金京 | Large-caliber expansion blowdown type parallel gate valve having bypass and not having flow diversion hole |
-
2013
- 2013-03-04 CN CN 201320102396 patent/CN203146881U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090034A (en) * | 2013-01-18 | 2013-05-08 | 南方阀门制造有限公司 | Wedge-caulking parallel sluice valve |
| CN103090034B (en) * | 2013-01-18 | 2014-11-26 | 南方阀门制造有限公司 | Wedge-caulking parallel sluice valve |
| WO2018053665A1 (en) * | 2016-09-22 | 2018-03-29 | 陈金京 | Large-caliber expansion blowdown type parallel gate valve having bypass and not having flow diversion hole |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20160304 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |