CN108730528A - High sealing instrument block valve - Google Patents
High sealing instrument block valve Download PDFInfo
- Publication number
- CN108730528A CN108730528A CN201810988751.7A CN201810988751A CN108730528A CN 108730528 A CN108730528 A CN 108730528A CN 201810988751 A CN201810988751 A CN 201810988751A CN 108730528 A CN108730528 A CN 108730528A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve rod
- deck
- high sealing
- sealing instrument
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
-
- 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention discloses a kind of high sealing instrument block valves,It is related to valve technology field,The high sealing instrument block valve includes valve body,Valve deck,Spool and rise it is silent,Further include the upper valve rod and lower valve rod being rotationally connected with inside valve deck,Upper valve rod is spaced apart equipped with several limit holes along itself circumferencial direction and the scale marker for indicating valve body aperture,Scale marker is set to the top of limit hole,It is corresponded on valve deck and is equipped with stop screw at the height of limit hole,It is corresponded on valve deck and offers inspection window at the height of scale marker,Spool includes the mounting base for being set to lower valve rod lower end and the cylindrical flap for being fixed on mounting base lower end,Inclined surface and vertical arc surface are respectively equipped on the periphery of cylindrical flap,The diameter of cylindrical flap has been more than silent internal diameter,So as to adjust the flow of medium,And under working environment,Valve can be locked,It effectively prevents under fortuitous event because leading to the situation that valve working state changes when someone accidentally touches.
Description
Technical field
The present invention relates to valve technology fields, more particularly to a kind of high sealing instrument block valve.
Background technology
Shut-off valve is also known as pipe valve valve, is a kind of one of most popular valve, belongs to forced seal formula valve, so
When valve is closed, it is necessary to apply pressure to flap, not leaked with forced seal face.The opening and closing element of shut-off valve is the flap of stopper,
Flap is for linear motion along the center line of valve seat, and the forms of motion of valve rod also has lifting rotation rod-type, can be used for control air,
The flowing of the various types fluids such as water, steam, various Korrosionsmediums, mud, oil product, liquid metal and radiating medium.
Application No. is the Chinese patents of CN207661185U to disclose a kind of shut-off valve, which includes shut-off valve sheet
Body, accommodates the cock body that is contained in the cut-off valve body and can be moved back and forth along the central axes direction of the cut-off valve body
In in the cock body adjustment spring and one end is connect with the cock body and the other end and the control that connect of cut-off valve body
Spring.Although the shut-off valve can enable adjustment spring to restore should have bullet by adding control spring compression adjustment spring
Power improves the service life of shut-off valve, but the shut-off valve can only play the role of keying to medium, can not adjust medium
Flow, and under working environment, valve cannot be locked, it is easy to change valve when accidentally touching so as to cause someone in unexpected situations
Working condition.
Invention content
The technical problem to be solved by the present invention is to which under normal circumstances keying can only be played the role of to medium, can not adjust
The flow of medium is saved, and under working environment, valve cannot be locked, is easy when accidentally being touched so as to cause someone in unexpected situations
Change the working condition of valve.
In order to solve the above technical problems, the present invention provides a kind of high sealing instrument block valve, including valve body, valve deck and
Spool, being internally provided with for valve body is silent for rising for flow of media, further includes the upper valve rod and screw thread being rotationally connected on the upside of valve deck
It is connected to the lower valve rod of upper valve rod lower end, upper valve rod is spaced apart equipped with several limit holes along itself circumferencial direction and for indicating valve
The scale marker of body aperture, scale marker are set to the top of limit hole, correspond on valve deck and be threaded at the height of limit hole
Stop screw for being embedded in limit hole corresponds to the scale marker offered at the height of scale marker for observation on valve deck
Inspection window, spool include set on lower valve rod lower end mounting base and be fixed on the cylindrical flap of mounting base lower end, it is cylindrical
It is respectively equipped with the inclined surface inconsistent with mouth upper end is opened and closed on the periphery of flap and is bonded the vertical of setting with mouth inner wall is opened and closed
The diameter of arc surface, the cylinder flap has been more than silent internal diameter.
Technique effect：The present invention is being carried out in use, by being rotated to that lower valve rod is driven to carry out to upper valve rod
Under sliding, to by lower valve rod band movable valve plug carry out up and down sliding, with this come to open and close mouth open and close, due to
The downside of cylindrical flap is equipped with vertical arc surface and inclined surface, so when cylindrical flap is embedded in and opens and closes in mouth, vertically
Arc surface, which enters to, to be opened and closed in mouth, and is bonded to each other with the inner wall for opening and closing mouth, and inclined surface is then inconsistent with keying mouth upper end；?
When being opened to opening and closing mouth, cylindrical flap is upwards into line slip, in slipping, vertical arc surface always with open and close in mouth
Wall is inconsistent, and inclined surface is then no longer inconsistent with keying mouth upper end, and is gradually distance from keying mouth, as cylindrical flap is continuous
Sliding upwards, inclined surface and the spacing opened and closed between mouth are increasing, so the flow of medium is also increasing, so by with
Upper step carries out the adjusting of flow；When user needs valve body being maintained at closing or open state, can pass through first
Detection window easily observes scale marker, to know the uninterrupted of valve body at this time, is then rotated to stop screw,
It is allowed to be embedded in limit hole, so that entire upper valve rod can not continue to rotate so that the aperture of cylindrical flap is protected
It holds unanimously, entire shut-off valve is locked, effectively prevent under fortuitous event because leading to valve working when someone accidentally touches
The situation that state changes.
The technical solution that the present invention further limits is：Limit hole and scale marker are between circumferencial direction of upper valve rod etc.
It is arranged away from interval.
Further, the end of stop screw is equipped with cushion pad.
The preceding high sealing instrument block valve, is equipped with the liner for fitting in valve deck inner wall between mounting base and lower valve rod.
The lower end coaxial arrangement of the preceding high sealing instrument block valve, valve deck is useful for itself connecting down with valve body
Gland nut, the upside fitting for pushing box nut are provided with the lower fixing nut for being threadedly connected to valve deck.
The preceding high sealing instrument block valve, the upper end coaxial threaded of valve deck are connected with the upper pressure inconsistent with upper valve rod
The downside fitting of box nut, upper press cover nut is provided with the upper fixing nut for being threadedly connected to valve deck.
The beneficial effects of the invention are as follows：
（1）In the present invention, since lower valve rod is threadedly connected to upper valve rod, so the sliding of the rotational angle and lower valve rod of upper valve rod
It, can be with so limit hole and scale marker are equidistantly spaced setting along the circumferencial direction of upper valve rod apart from linear
So that the concrete numerical value on scale marker has regularity, without causing disorderly and unsystematic phenomenon so that user is carrying out
It is easier when observation, while but also being the change process of an equivalent for the adjusting of the flow of valve body, one side makes
User is more efficiently and convenient for the adjusting of flow, on the other hand but also cylindrical flap is when carrying out flow-rate adjustment,
Medium is an incremental process for the impact force of itself, will not be since medium is for the impact force mistake of cylindrical flap
Damage that is big and leading to cylindrical flap, to extend the service life of cylindrical flap；
（2）In the present invention, the setting of cushion pad so that the not direct inside with upper valve rod when stop screw is embedded in limit hole
It is inconsistent, since stop screw and upper valve rod are all to belong to the larger component of hardness, so the two, which directly contradicts, can cause the two
Abrasion, and the setting of cushion pad then effectively avoids the generation of such case, the service life both greatly improved,
The setting of simultaneous buffering pad but also stop screw can be even closer be embedded in limit hole, ensure that stop screw can
By property, to which more efficiently cylindrical flap be locked；
（3）In the present invention, the setting of upper press cover nut is so that upper valve rod and the connection of valve deck upper end are even closer, but also sealing
Ring more consolidation is sheathed on upper valve rod, while the setting of upper fixing nut strengthens the company between upper press cover nut and valve deck
The degree of packing is connect, the sealing performance of sealing ring is increased, so that airtight and watertight padding is more not likely to produce leakage, strengthens entire valve
Cover the leakproofness at end；The setting of box nut is pushed so that the lower end of valve deck and the connection of valve body are even closer, but also spool
Even closer is embedded in valve inner, with fixing nut at present setting strengthen push box nut respectively with valve deck and valve body
Between the degree of packing that connects, the sealing performance of entire valve body is increased, so that medium is more not likely to produce leakage and enters
Into extraneous or valve deck, the leakproofness of entire valve deck lower end and valve body is strengthened.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the status diagram that spool of the present invention is opened；
Fig. 3 is the position view of stop screw of the present invention.
Wherein：1, valve body；11, mouth is opened and closed；2, valve deck；21, inspection window；3, spool；31, mounting base；32, cylinder valve
Valve；321, inclined surface；322, vertical arc surface；4, upper valve rod；41, limit hole；42, scale marker；5, lower valve rod；6, spiral shell is limited
Nail；61, cushion pad；7, it pads；81, box nut is pushed；82, lower fixing nut；91, upper press cover nut；92, upper fixing nut.
Specific implementation mode
A kind of high sealing instrument block valve provided in this embodiment, structure is as shown in Figure 1 to Figure 3, includes set on lower section
The upside of valve body 1, the keying mouth 11 of valve body 1 being internally provided with for flow of media, valve body 1 is equipped with valve deck 2, the lower end of valve deck 2
It is arranged with coaxial pushing box nut 81, and pushes the upper end that box nut 81 is threadedly connected to valve body 1 simultaneously, pushes box nut 81
Upside fitting be provided with coaxial lower fixing nut 82, and be threadedly coupled between lower fixing nut 82 and valve deck 2；Valve deck 2
Threaded upper ends are connected with coaxial upper press cover nut 91, and the downside fitting of upper press cover nut 91 is provided with coaxial upper fixing nut
92, and be threadedly coupled between upper fixing nut 92 and valve deck 2.
The upper end of valve deck 2 offers several limit holes inserted with coaxial upper valve rod 4, upper valve rod 4 along itself circumferencial direction
41, limit hole 41 is set to the inside of valve deck 2, and limit hole 41 is equidistantly spaced setting along the circumferencial direction of upper valve rod 4, simultaneously
It is corresponded on valve deck 2 and is additionally provided with the stop screw 6 for being embedded in limit hole 41 at the position of 41 height of limit hole, stop screw 6 is vertical
And it is threadedly connected to valve deck 2, the end of stop screw 6 is additionally provided with cushion pad 61；Upper valve rod 4 is also set up along itself circumferencial direction
There are scale marker 42, scale marker 42 to be set to inside valve deck 2, while being also disposed on the top of limit hole 41, and scale marker
42 are equidistantly spaced setting along the circumferencial direction of upper valve rod 4, correspond on valve deck 2 and are further opened at the position of 42 height of scale marker
Inspection window 21 can observe directly the concrete numerical value on scale marker 42 across inspection window 21.
The lower end of upper valve rod 4 is coaxially arranged with lower valve rod 5, and lower valve rod 5 is threadedly connected to the inside of upper valve rod 4, lower valve rod 5
Lower end be coaxially arranged with liner 7, liner 7 is bonded setting with the inner wall of valve deck 2 simultaneously, pad 7 lower end be fixed with it is coaxial
The lower end of mounting base 31, mounting base 31 is provided with cylindrical flap 32, and the diameter of cylindrical flap 32 is set greater than keying mouth
11 internal diameter is respectively arranged with vertical arc surface 322 and inclined surface 321, vertical arc surface on the periphery of cylindrical flap 32
322 are bonded to each other with the inner wall for opening and closing mouth 11 always, and inclined surface 321 is then mutually contradicted with the upper end for opening and closing mouth 11.
When needing to be closed this high sealing instrument block valve, upper valve rod 4 is rotated first, due to lower valve rod 5
It is threadedly connected to the inside of upper valve rod 4, so the rotation of upper valve rod 4 drives lower valve rod 5 to slide downwards, while the also band of lower valve rod 5
Dynamic liner 7 and entire spool 3 slide downwards, and during downward sliding, cylindrical flap 32 is gradually embedded to keying spool 3
In mouth 11, in 32 motion process of cylindrical flap, vertical arc surface 322 is inconsistent with the inner wall of keying mouth 11 always, works as cylinder
When the upper end of inclined surface 321 and keying mouth 11 on shape flap 32 is inconsistent, spool 3 entire will open and close mouth 11 and close, until
This completes the closing of entire high sealing instrument block valve.
When needing to be opened this high sealing instrument block valve, upper valve rod 4 is rotated first, due to lower valve rod 5
It is threadedly connected to the inside of upper valve rod 4, so the rotation of upper valve rod 4 drives lower valve rod 5 to slide upwards, while the also band of lower valve rod 5
Dynamic liner 7 and entire spool 3 slide upwards, and during upward sliding, cylindrical flap 32 is progressively disengaged to keying spool 3
Outside mouth 11, in 32 motion process of cylindrical flap, vertical arc surface 322 is inconsistent with the inner wall of keying mouth 11 always, and cylinder
Inclined surface 321 on shape flap 32 is then gradually distance from the upper end for opening and closing mouth 11, to complete entire high sealing instrument block valve
It opens.With the constantly sliding upwards of cylindrical flap 32, inclined surface 321 and the spacing opened and closed between mouth 11 are increasing, so
The flow of medium is also increasing, so adjusting the stream of entire high sealing instrument block valve according to the opening degree for opening and closing mouth 11
Amount.
When needing the flow by high sealing instrument block valve to be adjusted and carrying out locked, stop screw 6 is carried out first
Rotation so that stop screw 6 is detached from from limit hole 41, then is rotated to upper valve rod 4, and upper valve rod 4 is while rotation
All scale markers 42 are driven to be rotated, and observable scale marker 42 also rotates therewith in inspection window 21, at this time
User observes inspection window 21, stops operating when the scale marker 42 in inspection window 21 is required vertical, from
And the adjusting of flow is completed, the rotation of the progress of stop screw 6 negative direction again at this time so that stop screw 6 is gradually embedded to correspondence
Limit hole 41 in, until cushion pad 61 and the bottom of limit hole 41 on stop screw 6 are inconsistent, so far complete entirely highly dense
Seal the locked of instrument block valve.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (6)
1. a kind of high sealing instrument block valve, including valve body（1）, valve deck（2）And spool（3）, valve body（1）Be internally provided with confession
The keying mouth of flow of media（11）, it is characterised in that：Further include being rotationally connected with valve deck（2）The upper valve rod of upside（4）And screw thread
It is connected to upper valve rod（4）The lower valve rod of lower end（5）, upper valve rod（4）It is spaced apart along itself circumferencial direction and is equipped with several limit holes
（41）With for indicating valve body（1）The scale marker of aperture（42）, scale marker（42）Set on limit hole（41）Top, valve deck
（2）Upper corresponding limit hole（41）Height at be threadedly coupled be useful for being embedded in limit hole（41）Stop screw（6）, valve deck
（2）Upper corresponding scale marker（42）Height at offer scale marker for observation（42）Inspection window（21）, the valve
Core（3）Including being set to lower valve rod（5）The mounting base of lower end（31）Be fixed on mounting base（31）The cylindrical flap of lower end（32）,
Cylindrical flap（32）Periphery on be respectively equipped with open and close mouth（11）The inconsistent inclined surface in upper end（321）With with open and close mouth
（11）The vertical arc surface of inner wall fitting setting（322）, the cylinder flap（32）Diameter be more than silent internal diameter.
2. high sealing instrument block valve according to claim 1, it is characterised in that：The limit hole（41）And graduated scale
Know（42）Along upper valve rod（4）Circumferencial direction be equidistantly spaced setting.
3. high sealing instrument block valve according to claim 1, it is characterised in that：The stop screw（6）End
Equipped with cushion pad（61）.
4. high sealing instrument block valve according to claim 1, it is characterised in that：The mounting base（31）With lower valve rod
（5）Between be equipped with fit in valve deck（2）The liner of inner wall（7）.
5. high sealing instrument block valve according to claim 4, it is characterised in that：The valve deck（2）Lower end it is coaxial
It is provided with for by itself and valve body（1）The pushing box nut of connection（81）, push box nut（81）Upside fitting be provided with
It is threadedly connected to valve deck（2）Lower fixing nut（82）.
6. high sealing instrument block valve according to claim 5, it is characterised in that：The valve deck（2）Upper end it is coaxial
It is threaded with and upper valve rod（4）Inconsistent upper press cover nut（91）, upper press cover nut（91）Downside fitting be provided with spiral shell
Line is connected to valve deck（2）Upper fixing nut（92）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810988751.7A CN108730528A (en) | 2018-08-28 | 2018-08-28 | High sealing instrument block valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810988751.7A CN108730528A (en) | 2018-08-28 | 2018-08-28 | High sealing instrument block valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108730528A true CN108730528A (en) | 2018-11-02 |
Family
ID=63941733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810988751.7A Pending CN108730528A (en) | 2018-08-28 | 2018-08-28 | High sealing instrument block valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108730528A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795204A (en) * | 2020-06-17 | 2020-10-20 | 湖南云箭科技有限公司 | Disc valve hydraulic control device with direction-adjustable valve core |
| CN111853332A (en) * | 2020-06-17 | 2020-10-30 | 湖南云箭科技有限公司 | Axial direction movement adjustable disc valve hydraulic control device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201265686Y (en) * | 2008-10-08 | 2009-07-01 | 上海立新液压有限公司 | Brazing type throttling valve |
| CN102506180A (en) * | 2011-10-29 | 2012-06-20 | 重庆川仪调节阀有限公司 | Micro-flow regulating valve |
| CN106838348A (en) * | 2017-03-28 | 2017-06-13 | 江苏星河阀门有限公司 | HTHP bellows stop valve |
| CN206816833U (en) * | 2017-03-28 | 2017-12-29 | 江苏星河阀门有限公司 | HTHP bellows stop valve |
-
2018
- 2018-08-28 CN CN201810988751.7A patent/CN108730528A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201265686Y (en) * | 2008-10-08 | 2009-07-01 | 上海立新液压有限公司 | Brazing type throttling valve |
| CN102506180A (en) * | 2011-10-29 | 2012-06-20 | 重庆川仪调节阀有限公司 | Micro-flow regulating valve |
| CN106838348A (en) * | 2017-03-28 | 2017-06-13 | 江苏星河阀门有限公司 | HTHP bellows stop valve |
| CN206816833U (en) * | 2017-03-28 | 2017-12-29 | 江苏星河阀门有限公司 | HTHP bellows stop valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795204A (en) * | 2020-06-17 | 2020-10-20 | 湖南云箭科技有限公司 | Disc valve hydraulic control device with direction-adjustable valve core |
| CN111853332A (en) * | 2020-06-17 | 2020-10-30 | 湖南云箭科技有限公司 | Axial direction movement adjustable disc valve hydraulic control device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181102 |
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| RJ01 | Rejection of invention patent application after publication |