CN220668425U - K-shaped forced sealing flat gate valve - Google Patents
K-shaped forced sealing flat gate valve Download PDFInfo
- Publication number
- CN220668425U CN220668425U CN202322231438.8U CN202322231438U CN220668425U CN 220668425 U CN220668425 U CN 220668425U CN 202322231438 U CN202322231438 U CN 202322231438U CN 220668425 U CN220668425 U CN 220668425U
- Authority
- CN
- China
- Prior art keywords
- flashboard
- sealing
- valve
- bevel gear
- grease injection
- 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.)
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 80
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 239000004519 grease Substances 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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- Sliding Valves (AREA)
Abstract
The utility model relates to a K-type forced sealing flat gate valve, which comprises a valve body, a valve cover, a valve seat, a valve rod, a gate plate and a transmission device, wherein a grease injection sealing mechanism is arranged between the gate plate and the valve seat, the grease injection sealing mechanism consists of a sealing cavity between the valve seat and the gate plate, which is communicated with a grease injection valve on the valve body through a grease injection hole, and the sealing cavity consists of a sealing ring arranged on the outer circumference of the valve seat and in movable sealing fit with the gate plate and an annular space between the outer sides of the sealing ring. After closing, sealing grease is injected into a sealing cavity between the flashboard and the valve seat, so that the problem of uneven sealing specific pressure caused by processing errors of sealing surfaces of the flashboard and the valve seat is solved, and the sealing performance is improved.
Description
Technical Field
The utility model belongs to the field of valves, and particularly relates to a K-type double-flashboard gate valve.
Background
The K-shaped inclined surfaces of the left flashboard and the right flashboard are mutually matched to form a double-flashboard structure, the upper end of the left flashboard is fixedly connected with the valve rod, the right flashboard is internally provided with a limiting device, the two flashboard are mutually connected by a spring, and when the valve is opened and closed, the K-shaped surfaces of the left flashboard and the right flashboard are utilized to wedge or loosen, so that the sealing or opening between the flashboard and the sealing surface of the valve seat is realized. The main disadvantages are: the processing errors of the flashboard sealing surface and the valve seat sealing surface lead to inconsistent sealing specific pressure in the circumferential direction of the sealing pair under the sealing fit state of the flashboard sealing surface and the valve seat sealing surface, and the situation that the local sealing specific pressure is lower exists, so that the sealing performance is affected.
Disclosure of Invention
The utility model aims at overcoming the defects in the prior art, and provides a K-type forced sealing flat gate valve which has consistent sealing specific pressure in the circumferential direction and good sealing performance when a gate plate and a valve seat are matched with each other.
The technical scheme of the utility model is as follows:
the utility model provides a K type forced seal flat gate valve, which comprises a valve body, the valve gap, the disk seat, the valve rod, flashboard, transmission, the valve gap is by screw rod, nut fixed mounting on the valve body, set up sealed pad between the two, the flashboard comprises K type double flashboard structure by left flashboard and right flashboard, left flashboard upper end is connected with transmission through the valve rod, the disk seat comprises left disk seat and right disk seat, install respectively in the valve body import and export passageway, left disk seat and right disk seat inlay the sealing washer respectively and the sealed face of left flashboard and right flashboard mutually support and form double seal pair structure, set up packing sealing device between valve gap and valve rod; the method is characterized in that: the device is characterized in that a grease injection sealing mechanism is arranged between the flashboard and the valve seat, the grease injection sealing mechanism is composed of a sealing cavity between the valve seat and the flashboard, the grease injection valve is communicated with the valve body through a grease injection hole, and the sealing cavity is composed of an annular space arranged on the outer circumference of the valve seat and matched with the flashboard in a dynamic sealing mode and between the sealing ring and the outer side of the sealing ring.
Preferably, an axial limiting shoulder is arranged above the sealing surface of the right flashboard, a limiting block matched with the axial limiting shoulder is arranged on the outer circular surface of the upper side of the outlet channel of the valve body, the limiting block is provided with a knife-shaped circular arc concentric with the valve body channel, and the axial limiting shoulder is provided with a circular arc surface matched with the knife-shaped circular arc of the limiting block.
Preferably, a spring cavity is arranged between K-shaped surfaces of the left flashboard and the right flashboard, and a torsion spring for connecting the left flashboard and the right flashboard is arranged in the spring cavity.
Preferably, the transmission device adopts a bevel gear transmission mechanism, and the bevel gear transmission mechanism is formed by mutually meshing a bevel gear fixedly connected with the end part of the hand wheel transmission shaft and a bevel gear at the periphery of the valve rod nut.
Compared with the prior art, the utility model has the beneficial effects that: and after the sealing mechanism is closed, sealing grease is injected into a sealing cavity between the flashboard and the valve seat, so that the problem of uneven sealing specific pressure caused by processing errors of sealing surfaces of the flashboard and the valve seat is solved, and the sealing performance is improved.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure: 1 valve body, 2 nuts, 3, screw rod, 4 sealing gasket, 5 valve gap, 6 valve rod, 7 support, 8 gear box, 9 bevel gear, 10 axial limit shoulder, 11 stopper, 12 grease injection hole, 13 grease injection valve, 14 disk seat, 15 sealing ring, 16 spring chamber, 17 jump ring, 18 sealing ring, 19 left flashboard, 20 flashboard again.
Detailed Description
The K-type forced sealing flat gate valve shown in FIG. 1 comprises a valve body 1, a valve cover 5, a valve seat 14, a valve rod 6, a gate plate and a transmission device, wherein the valve cover 5 is fixedly arranged on the valve body 1 by a screw 3 and a nut 2, a sealing gasket 4 is arranged between the valve cover and the valve body, the gate plate is of a K-type double gate plate structure formed by a left gate plate 19 and a right gate plate 20, the upper end of the left gate plate 19 is connected with the transmission device through the valve rod 6, the valve seat 14 is formed by a left valve seat and a right valve seat which are respectively arranged in an inlet and outlet channel of the valve body 1, the left valve seat and the right valve seat are respectively embedded with a sealing ring 18 and are matched with sealing surfaces of the left gate plate 19 and the right gate plate 20 to form a sealing pair, and a filler sealing device is arranged between the valve cover 5 and the valve rod 6; the method is characterized in that: the grease injection sealing mechanism is arranged between the flashboard and the valve seat 14 and consists of a sealing cavity between the valve seat 14 and the flashboard, which is communicated with a grease injection valve 13 on the valve body 1 through a grease injection hole 12, and the sealing cavity consists of an annular space between a sealing ring 15 which is arranged on the outer circumference of the valve seat 14 and is in movable sealing fit with the flashboard and the outer side of a sealing ring 18. After the flashboard is closed, sealing grease and a sealing ring 18 are injected into the sealing cavity through the grease injection valve 13 to form a double sealing structure, so that the problem of uneven sealing specific pressure in the circumferential direction of the sealing pair caused by machining errors of the flashboard and the sealing surface of the valve seat 14 is solved.
An axial limiting convex shoulder 10 is arranged above the sealing surface of the right flashboard 20, a limiting block 11 which is matched with the axial limiting convex shoulder 10 is arranged on the upper side of the outer circular surface of the outlet channel of the valve body 1, the axial limiting convex shoulder 10 is propped against the limiting block 11 in the closing process of the left flashboard 19, the left flashboard 19 and the right flashboard 20 are propped to be in sealing fit with the valve seat 14, the limiting block 11 is provided with a knife-shaped circular arc concentric with the channel of the valve body 1, the problem that the flashboard is not closed in place due to medium accumulation on the limiting block 11 can be prevented, the axial limiting convex shoulder 10 is provided with a circular arc surface which is matched with the knife-shaped circular arc of the limiting block 11, and the K-shaped surface matching position between the right flashboard 20 and the left flashboard 19 is automatically adjusted when the valve is closed, so that the circumferential direction deviation of the right flashboard 20 is prevented.
A spring cavity 16 is arranged between K-shaped surfaces of the left flashboard 19 and the right flashboard 20, a torsion spring 17 for connecting the left flashboard 19 and the right flashboard 20 is arranged in the spring cavity 16, and the right flashboard 20 is elastically connected on the left flashboard 19.
The transmission device adopts a bevel gear transmission mechanism, the bevel gear transmission mechanism is formed by mutually meshing a bevel gear fixedly connected with the end part of a hand wheel transmission shaft and a bevel gear 9 at the periphery of a valve rod nut, the bevel gear 9 is arranged on a gear box 8 through an upper bearing and a lower bearing, the gear box 8 is arranged at the upper end of a valve cover 5 through a bracket 7, the bevel gear 9 drives the valve rod nut to rotate so as to transmit the valve rod 6, and the rotating motion of the valve rod nut is converted into the vertical linear motion of the valve rod 6 through a guide device.
Claims (5)
1. The utility model provides a K type forced seal flat gate valve, including valve body (1), valve gap (5), disk seat (14), valve rod (6), flashboard, transmission, the flashboard comprises K type double flashboard structure of left flashboard (19) and right flashboard (20), left flashboard (19) upper end is connected with transmission through valve rod (6), disk seat (14) are constituteed by left disk seat and right disk seat, install respectively in the import and export passageway of valve body (1), left disk seat and right disk seat inlay sealing washer (18) respectively and left flashboard (19) and right flashboard (20) sealing surface mutually support and form sealed pair, set up packing sealing device between valve gap (5) and valve rod (6); the method is characterized in that: the grease injection sealing mechanism is arranged between the flashboard and the valve seat (14), the grease injection sealing mechanism is composed of a grease injection valve (13) communicated with the valve body (1) through a grease injection hole (12) in a sealing cavity between the valve seat (14) and the flashboard, and the sealing cavity is composed of an annular space arranged on the outer circumference of the valve seat (14) and matched with the flashboard in a movable sealing manner and between the sealing ring (15) and the outer side of the sealing ring (18).
2. The K-type forced seal flat gate valve according to claim 1, characterized in that: an axial limiting convex shoulder (10) is arranged above the sealing surface of the right flashboard (20), a limiting block (11) which is matched with the axial limiting convex shoulder (10) is arranged on the upper side of the outer circular surface of the outlet channel of the valve body (1), the limiting block (11) is provided with a knife-shaped circular arc which is concentric with the channel of the valve body (1), and the axial limiting convex shoulder (10) is provided with a circular arc surface which is matched with the knife-shaped circular arc of the limiting block (11).
3. The K-type forced seal flat gate valve according to claim 1 or 2, characterized in that: a spring cavity (16) is arranged between K-shaped surfaces of the left flashboard (19) and the right flashboard (20), and a torsion spring (17) for connecting the left flashboard (19) and the right flashboard (20) is arranged in the spring cavity (16).
4. The K-type forced seal flat gate valve according to claim 1 or 2, characterized in that: the transmission device adopts a bevel gear transmission mechanism, and the bevel gear transmission mechanism is formed by mutually meshing a bevel gear fixedly connected with the end part of a hand wheel transmission shaft and a bevel gear (9) at the periphery of a valve rod nut.
5. A K-type forced seal flat gate valve according to claim 3, characterized in that: the transmission device adopts a bevel gear transmission mechanism, and the bevel gear transmission mechanism is formed by mutually meshing a bevel gear fixedly connected with the end part of a hand wheel transmission shaft and a bevel gear (9) at the periphery of a valve rod nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322231438.8U CN220668425U (en) | 2023-08-18 | 2023-08-18 | K-shaped forced sealing flat gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322231438.8U CN220668425U (en) | 2023-08-18 | 2023-08-18 | K-shaped forced sealing flat gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220668425U true CN220668425U (en) | 2024-03-26 |
Family
ID=90340158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322231438.8U Active CN220668425U (en) | 2023-08-18 | 2023-08-18 | K-shaped forced sealing flat gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220668425U (en) |
-
2023
- 2023-08-18 CN CN202322231438.8U patent/CN220668425U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |