CN104265927A - Novel sealing structure of flashboard - Google Patents
Novel sealing structure of flashboard Download PDFInfo
- Publication number
- CN104265927A CN104265927A CN201410512078.1A CN201410512078A CN104265927A CN 104265927 A CN104265927 A CN 104265927A CN 201410512078 A CN201410512078 A CN 201410512078A CN 104265927 A CN104265927 A CN 104265927A
- Authority
- CN
- China
- Prior art keywords
- flashboard
- valve
- valve seat
- sealing structure
- novel sealing
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 28
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
Classifications
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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
-
- 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 novel sealing structure of a flashboard. The novel sealing structure comprises a casing and a valve deck located at the top of the casing. A valve seat is arranged in the casing, a medium channel is arranged at the bottom of the valve seat, and a vertical flashboard is arranged in the valve seat. A valve element for vertically moving the flashboard is fixed at the upper end of the flashboard. The flashboard is divided into a left flashboard and a right flashboard, and the combination surfaces of the left flashboard and the right flashboard are double slopes in mutual fit. A boss for supporting the left flashboard is arranged in the casing below the left flashboard. As the combination surfaces of the left flashboard and the right flashboard are double slopes in mutual fit, when a valve needs to be closed, the right flashboard is controlled by the valve element to move downwards, then sealing force is generated when the slopes at the upper ends of the left flashboard and the right flashboard close the valve, and finally inlet media and outlet media are isolated by aid of the lower end of the right flashboard. When the valve is opened, the right flashboard is controlled by the valve element to move upwards, a space between a valve deck cavity at the upper end and media is sealed due to the slopes at the lower ends of the left flashboard and the right flashboard when the valve is opened, and massive entering of media is avoided.
Description
Technical field
The present invention relates to a kind of sealing configuration, be specifically related to a kind of flashboard novel sealing structure.
Background technique
Gate valve is one of the most frequently used block valve, is mainly used to the medium connected or block in pipeline, does not apply to regulate rate-of flow.The pressure used, temperature and diameter range are very large, in especially applying to, large diameter pipeline.The feature of gate valve is that fluid resistance is little, and lock body interior media through hole is straight-through, MEDIA FLOW through time do not change its flow direction, thus flow resistance is less.Open and close more laborsaving, during keying valve plate moving direction and media flow direction perpendicular.Media flow direction is generally unrestricted, and medium can flow through from both sides any direction, all can reach the object of connecting or blocking.Be convenient to install, in the pipeline that the flow direction applying to medium may change.
Traditional valve seat and ram seal only apply axial force by valve rod to flashboard, and promote flashboard and move to body base, the pressure by medium makes flashboard and valve seat realize sealing.Owing to having pressure medium all the time in valve epicoele, easily make valve stem seal produce and leak outside.Ram seal face is two parallel planes, and flashboard thickness is fixed non-adjustable.Flashboard and seat material are carbon steel or alloyed steel, and after heat treatment surface hardness is higher, and the sealing pair formed so not easily realizes.
Summary of the invention
The object of the present invention is to provide a kind of flashboard novel sealing structure, solve the problem that existing structure easily causes dielectric leakage.
For achieving the above object, technological scheme of the present invention is: flashboard novel sealing structure, comprise housing and the valve gap being positioned at case top, in described housing, valve seat is installed, the bottom of described valve seat is provided with medium channel, vertical flashboard is also provided with in described valve seat, flashboard upper end is fixed with the spool of vertical mobile flashboard, described flashboard is divided into left flashboard and right flashboard, the junction plane of described left flashboard and right flashboard is the double inclined plane cooperatively interacted, and the below being positioned at left flashboard in described housing is provided with the boss that supports left flashboard.
When adopting technique scheme, because the junction plane of left flashboard and right flashboard is the double inclined plane cooperatively interacted, when throttle down, control right flashboard by spool to move down, make the inclined-plane of two flashboard upper ends, left and right produce sealing force when throttle down, by the underpart of right flashboard, import and export medium is cut off.When Open valve, control right flashboard move up by spool, the inclined-plane of left flashboard and right flashboard lower end makes when Open valve to form sealing between the valve cover cavity of upper end and medium, avoids entering in a large number of medium.Like this at valve opening state, the pressure in valve cover cavity is less, reduces between stuffing box and valve rod and leaks, thus greatly reduce valve leakage out of steam system can possibility.
Further, the upper end of described left flashboard is provided with a lateral projection towards right flashboard, and described valve core upper sleeve is provided with holddown spring, and described holddown spring is between the upper end of right flashboard and the projection of left flashboard.Above-mentioned setting, is provided with a holddown spring between left flashboard, right flashboard two pieces of double inclined plane flashboards.When valve opening, the elastic force of holddown spring overcomes the self gravitation of left flashboard, forms a pretightening force, makes two shoe brake plates open all the time and keep sealing state.
Further, seal ring is provided with between described valve seat and housing.
Further, the middle part of described left flashboard to the right flashboard is given prominence to, and corresponding groove is given prominence to the middle part of left flashboard in the middle part of described right flashboard.
Above-mentioned setting can provide better sealing effect, avoids the seepage of medium.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the schematic cross-section of flashboard novel sealing structure embodiment of the present invention.
Embodiment
As shown in Figure 1, flashboard novel sealing structure of the present invention, comprise housing and the valve gap being positioned at case top, valve seat 1 is installed in housing, valve seat 1 cross setting, seal ring is provided with between valve seat 1 and housing, the bottom of valve seat 1 is provided with medium channel, vertical flashboard is also provided with in valve seat, described flashboard is divided into left flashboard 2 and right flashboard 21, right flashboard 21 upper end is fixed with the spool of vertical mobile right flashboard 21, the junction plane of described left flashboard 2 and right flashboard 21 is the double inclined plane cooperatively interacted, flashboard 21 is outstanding to the right at the middle part of left flashboard 2, corresponding groove is given prominence to the middle part of left flashboard 2 in the middle part of right flashboard 21.The below being positioned at left flashboard 2 in housing is provided with the boss that supports left flashboard 2.The upper end of left flashboard 2 is provided with a lateral projection towards right flashboard 21, and valve core upper sleeve is provided with holddown spring 3, and holddown spring 3 is between the upper end and the projection of left flashboard 2 of right flashboard 21.
Valve seat 1 forms primarily of bibeveled left flashboard 2, right flashboard 21 and holddown spring 3 with the sealing configuration of flashboard, and its maximum feature is the inclined-plane that the upper and lower end of left flashboard 2 and right flashboard 21 is all designed to coordinate, and is double inclined plane flashboard.The inclined-plane of two flashboard upper ends produces sealing force when throttle down, and import and export medium is cut off.The inclined-plane of left flashboard 2 and right flashboard 21 lower end makes when Open valve to form sealing between valve cover cavity and medium.Like this at valve opening state, the pressure in valve cover cavity is less, reduces between stuffing box and valve rod and leaks, thus greatly reduce leaking outside of valve.
A holddown spring 3 is provided with between left flashboard 2, right flashboard 21 two pieces of double inclined plane flashboards.When valve opening, the elastic force of holddown spring 3 overcomes the self gravitation of left flashboard 2, forms a pretightening force, makes two shoe brake plates open all the time and keep sealing state.
Valve seat adopts ultra high molecular polyethylene material.The matrix of double-flashboard adopts steel, and seal face carries out plasma spraying nickel-base alloy, and the sealing pair formed thus can effectively improve its frictional behaviour, plays the effect of excellent sealing.After the stuffing box of plate valve, flashboard and valve seat construction improve, the sealing effect of valve is good.
Above-described is only the preferred embodiment of the present invention; should be understood that; for a person skilled in the art; under the prerequisite not departing from structure of the present invention; some distortion and improvement can also be made; these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.
Claims (4)
1. flashboard novel sealing structure, comprise housing and the valve gap being positioned at case top, in described housing, valve seat is installed, the bottom of described valve seat is provided with medium channel, is also provided with vertical flashboard in described valve seat, and flashboard upper end is fixed with the spool of vertical mobile flashboard, it is characterized in that, described flashboard is divided into left flashboard and right flashboard, and the junction plane of described left flashboard and right flashboard is the double inclined plane cooperatively interacted, and the below being positioned at left flashboard in described housing is provided with the boss that supports left flashboard.
2. flashboard novel sealing structure according to claim 1, it is characterized in that, the upper end of described left flashboard is provided with a lateral projection towards right flashboard, and described valve core upper sleeve is provided with holddown spring, and described holddown spring is between the upper end of right flashboard and the projection of left flashboard.
3. flashboard novel sealing structure according to claim 1, is characterized in that, is provided with seal ring between described valve seat and housing.
4. flashboard novel sealing structure according to claim 1, is characterized in that, the middle part of described left flashboard to the right flashboard is given prominence to, and corresponding groove is given prominence to the middle part of left flashboard in the middle part of described right flashboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512078.1A CN104265927A (en) | 2014-09-29 | 2014-09-29 | Novel sealing structure of flashboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512078.1A CN104265927A (en) | 2014-09-29 | 2014-09-29 | Novel sealing structure of flashboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104265927A true CN104265927A (en) | 2015-01-07 |
Family
ID=52157481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410512078.1A Pending CN104265927A (en) | 2014-09-29 | 2014-09-29 | Novel sealing structure of flashboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104265927A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107435744A (en) * | 2017-09-18 | 2017-12-05 | 宝鸡泰华磁机电技术研究所有限公司 | Static seal driven type gate valve with inclined-plane alloy seal and scarfing cinder structure |
-
2014
- 2014-09-29 CN CN201410512078.1A patent/CN104265927A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107435744A (en) * | 2017-09-18 | 2017-12-05 | 宝鸡泰华磁机电技术研究所有限公司 | Static seal driven type gate valve with inclined-plane alloy seal and scarfing cinder structure |
| CN107435744B (en) * | 2017-09-18 | 2023-03-14 | 宝鸡泰华磁机电技术研究所有限公司 | Static seal transmission type gate valve with inclined plane alloy seal and slag removal structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150107 |