CN109442084A - A kind of screw thread type copper ball-cock assembly - Google Patents
A kind of screw thread type copper ball-cock assembly Download PDFInfo
- Publication number
- CN109442084A CN109442084A CN201811449251.2A CN201811449251A CN109442084A CN 109442084 A CN109442084 A CN 109442084A CN 201811449251 A CN201811449251 A CN 201811449251A CN 109442084 A CN109442084 A CN 109442084A
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- China
- Prior art keywords
- gear
- rod
- drive
- ball
- screw thread
- 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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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
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
-
- 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
-
- 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
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
- F16K31/20—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve
- F16K31/24—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve with a transmission with parts linked together from a single float to a single valve
-
- 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
- F16K31/54—Mechanical actuating means with toothed gearing with pinion and rack
-
- 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
- F16K33/00—Floats for actuation of valves or other apparatus
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses a kind of screw thread type copper ball-cock assemblys, comprising: valve body, spool, valve rod, gear drive, drive rod, guide rod, connecting rod and floating ball；Rack gear one is offered on the bottom end side wall of valve rod；Gear drive is mounted on the bottom end of valve rod, and gear drive is engaged with rack gear one；Drive rod is vertically installed at the left side of gear drive；The guide groove of vertical direction is offered on drive rod；The rack gear two being meshed with the gear drive is offered on the right side wall of drive rod；Guide rod is applied in the guide groove of the drive rod.Screw thread type copper ball-cock assembly provided by the invention, is provided with gear drive, drives spool to move left and right by gear engagement system, stable transmission, reliable operation；And when liquid level generates wave, under the action of gear mesh force, floating ball will not fluctuate up and down therewith, and floating ball will not fall off too early, while effectively prevent the abrasion of spool, greatly extend the service life of ball-cock assembly.
Description
Technical field
The present invention relates to valve technology field, more particularly to a kind of screw thread type copper ball-cock assembly.
Background technique
Ball-cock assembly is mainly used for controlling the height in pond or water tank level, and when the water level descends, ball-cock assembly is with water level
Decline, main valve open water supply, and when water level rises, ball-cock assembly follows water level to rise, and main valve, which is closed, stops water supply.
Existing ball-cock assembly generally comprises floating ball valve body and floating ball, and floating ball is generally directly placed on the liquid level of water tank,
The water impact generated during moisturizing makes water tank level generate biggish wave, closes moisturizing liquid level to close in moisturizing
When, floating ball is generated with wave and is periodically significantly swung up and down, and the main valve of floating ball valve body is caused periodically to be switched
Movement, and the periodic switch of main valve make moisturizing water flow generate periodically variation, exacerbate the fluctuation of high water tank, so
The periodical of floating ball continuous high frequency rate is caused to move up and down, each component of ball-cock assembly is chronically in periodically abrasion, floating ball pole
Easily the problems such as falling off, lead to that the service life of ball-cock assembly substantially reduces and ball-cock assembly prematurely damages.
Therefore it provides it is a kind of can be avoided floating ball with wave generate periodic wobble screw thread type copper ball-cock assembly be this field
The technical issues of technical staff's urgent need to resolve.
Summary of the invention
In view of this, being provided with gear drive the present invention provides a kind of screw thread type copper ball-cock assembly, being nibbled by gear
Conjunction mode drives spool to move left and right, stable transmission, reliable operation；And when liquid level generates wave, in gear mesh force
Under the action of, floating ball will not fluctuate up and down therewith, and floating ball will not fall off too early, while effectively prevent the abrasion of spool, greatly
Extend the service life of ball-cock assembly.
To achieve the goals above, the present invention adopts the following technical scheme: a kind of screw thread type copper ball-cock assembly, comprising: valve body,
Spool, valve rod, gear drive, drive rod, guide rod, connecting rod and floating ball；Wherein:
The valve body includes: valve cavity, water inlet and water outlet through-hole；The valve cavity is arranged in the water inlet
Right side；The water outlet through-hole is provided with the bottom end of the valve cavity；
The spool adaptation is mounted on inside the valve cavity, and spool left and right in the valve cavity is moved
It is dynamic；
One end of the valve rod is fixedly connected with the spool；Rack gear one is offered on the bottom end side wall of the valve rod；
The gear drive is mounted on the bottom end of the valve rod, and the gear drive and the rack gear one
Engagement；
The drive rod is vertically installed at the left side of the gear drive；Vertical direction is offered on the drive rod
Guide groove；The rack gear two being meshed with the gear drive is offered on the right side wall of the drive rod；
The guide rod is fixedly mounted on the valve body inner sidewall；And the guide rod is applied in the drive rod
In guide groove, controls the drive rod and move up and down vertically；
One end of the connecting rod is hinged on the lateral wall bottom end of the valve body；The other end connection of the connecting rod is
State floating ball；The bottom end of the drive rod is slidably connected in the connecting rod.
The utility model has the advantages that ball-cock assembly of the invention, is provided with connecting rod and drive rod, the bottom end of drive rod is slidably connected at company
The guide groove of vertical direction is offered on extension bar, and on drive rod, guide rod is interspersed in guide groove, ensure that drive rod only
It can move up and down vertically under the action of floating up and down in connecting rod, movement rail stability-of-path is reliable, is vertically directed effect pole
It is good.In addition, the present invention is additionally provided with gear drive, the rack gear being meshed with gear drive is provided on drive rod
Two, the rack gear one being meshed with gear drive is provided on valve rod, by moving up and down vertically for drive rod, and then is driven
The forward direction or reverse rotation motion of transmission mechanism, and then moving left and right with ovable valve stem, and then realize moving left and right for spool.
Using the gear-driven driving method of the present invention, stable transmission, reliable operation；And when liquid level generates wave, in gear
Under the action of engagement force, floating ball will not fluctuation, floating ball will not be crossed early in falling off in connecting rod, be effectively prevented simultaneously up and down therewith
The abrasion of spool greatly extends the service life of ball-cock assembly.
Preferably, in a kind of above-mentioned screw thread type copper ball-cock assembly, the gear drive includes: gear one, gear two
With gear three；The gear one, gear two and gear three successively engage installation；And the gear one is engaged with the rack gear two
Installation；The gear three engages installation with the rack gear one.
The utility model has the advantages that gear one, gear two and gear three successively engage installation, the rack gear two of drive rod moves up and down drive
Gear one rotates, and then rotates with moving gear two, and then rotates with moving gear three.Gear three engages peace with the rack gear one of valve rod
Dress, gear three rotates, and then moves left and right with carry-over bar one.Above structure be not only simple in structure it is easy for installation, and can essence
Quasi-, quick, stable promotion valve rod moves left and right.
Preferably, in a kind of above-mentioned screw thread type copper ball-cock assembly, the spool is inlaid with close to the side of the water inlet
Seal gasket；The seal gasket and the water inlet cooperate.
The utility model has the advantages that seal gasket can be by water inlet deadend, sealing effect is splendid.
Preferably, in a kind of above-mentioned screw thread type copper ball-cock assembly, sleeve is socketed in the connecting rod；The drive rod
Bottom end is connected on the sleeve by articulation piece.
The utility model has the advantages that being equipped with sleeve in connecting rod, sleeve slides in connecting rod, can effectively reduce connecting rod
Skimming wear, and the flexible vertical up and down motion of drive rod has been effectively ensured.
Preferably, in a kind of above-mentioned screw thread type ball-cock assembly, the floating ball is copper material, by two of surface mechanical polishing
Semicircle ball is stitched together, and is air inside floating ball.
Preferably, in a kind of above-mentioned screw thread type ball-cock assembly, the inside of the water inlet is equipped with filter screen
The utility model has the advantages that filter screen can stop the impurity in water inlet line to enter inside ball-cock assembly, and then reduce impurity
The bad drawback of sealing effect caused by abrasion and impurity to ball-cock assembly.
Preferably, it in a kind of above-mentioned screw thread type ball-cock assembly, is provided on the outside of the water inlet and water inlet pipe cooperation
External screw thread；Or it is provided on the inside of the water inlet and the matched internal screw thread of water inlet pipe.
The utility model has the advantages that according to the thread forms of water inlet pipe, it is matched that matched helicitic texture is set in water inlet；
Water inlet pipe is threadedly coupled with water inlet by screw thread type, and fast and flexible is dismounted, and has highly beneficial technical effect.
It can be seen via above technical scheme that compared with prior art, it is floating that the present disclosure provides a kind of screw thread type copper
Ball valve is provided with gear drive, drives spool to move left and right by gear engagement system, stable transmission, reliable operation；
And when liquid level generates wave, under the action of gear mesh force, floating ball will not fluctuation, floating ball will not take off too early up and down therewith
It falls, while effectively preventing the abrasion of spool, greatly extend the service life of ball-cock assembly.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 attached drawing is the structural schematic diagram of water inlet open state of the present invention；
Fig. 2 attached drawing is the structural schematic diagram of water inlet closed state of the present invention；
Fig. 3 attached drawing is the structural schematic diagram of gear drive of the present invention.
Wherein: 1 being valve body, 11 be water inlet, 12 be water outlet through-hole, 2 be spool, 21 be seal gasket, 3 be valve rod, 4 be
Gear drive, 41 be gear one, 42 be gear two, 43 are that gear three, 5 is drive rod, 6 is guide rod, 7 connecting rods, 8
It is sleeve for floating ball, 9.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a kind of screw thread type copper ball-cock assemblys, are provided with gear drive, are engaged by gear
Mode drives spool to move left and right, stable transmission, reliable operation；And when liquid level generates wave, in gear mesh force
Under effect, floating ball will not fluctuate up and down therewith, and floating ball will not fall off too early, while effectively prevent the abrasion of spool, greatly prolong
The service life of ball-cock assembly is grown.
A kind of screw thread type copper ball-cock assembly, comprising: valve body 1, spool 2, valve rod 3, gear drive 4, drive rod 5, guiding
Bar 6, connecting rod 7 and floating ball 8；Wherein:
Valve body 1 includes: valve cavity, water inlet 11 and water outlet through-hole 12；The right side of valve cavity is arranged in water inlet 11；
Water outlet through-hole 12 is provided with the bottom end of valve cavity；
The adaptation of spool 2 is mounted on inside valve cavity；
One end of valve rod 3 is fixedly connected with spool 2；Rack gear one is offered on the bottom end side wall of valve rod 3；
Gear drive 4 is mounted on the bottom end of valve rod 3, and gear drive 4 is engaged with rack gear one；
Drive rod 5 is vertically installed at the left side of gear drive 4；The guide groove of vertical direction is offered on drive rod 5；
The rack gear two being meshed with gear drive 4 is offered on the right side wall of drive rod 5；
Guide rod 6 is fixedly mounted on 1 inner sidewall of valve body；And guide rod 6 is applied in the guide groove of drive rod 5, control
Drive rod 5 processed moves up and down vertically；
One end of connecting rod 7 is hinged on the lateral wall bottom end of valve body 1；The other end of connecting rod 7 is connected with floating ball 8；Driving
The bottom end of bar 5 is slidably connected in connecting rod 7.
In order to advanced optimize above technical scheme, gear drive 4 includes: gear 1, gear 2 42 and gear
3 43；Gear 1, gear 2 42 and gear 3 43 successively engage installation；And gear 1 engages installation with rack gear two；Institute
It states gear 3 43 and engages installation with rack gear one.
In order to advanced optimize above technical scheme, spool 2 is inlaid with seal gasket 21 close to the side of water inlet 11；It is close
Potting pad 21 and water inlet 11 cooperate.
In order to advanced optimize above technical scheme, sleeve 9 is socketed in connecting rod 7；The bottom end of drive rod 5 passes through hinged
Part is connected on sleeve 9.
In order to advanced optimize above technical scheme, floating ball 8 is copper material, by two semicircle balls of surface mechanical polishing
It is stitched together, is air inside floating ball.
In order to advanced optimize above technical scheme, the inside of water inlet 11 is equipped with filter screen.
In order to advanced optimize above technical scheme, the outside of water inlet 11 is provided with the external screw thread with water inlet pipe cooperation.
In order to advanced optimize above technical scheme, the inside of water inlet 11 is provided with and the matched internal screw thread of water inlet pipe.
Working principle:
As shown in Figure 1, floating ball 8 declines when the water level decreasing in pond, and then connecting rod 7 is driven to decline；Sleeve 9 is even
Slide downward under the induced effect of extension bar, so control drive rod 5 under the mating reaction of guide groove and guide rod 6 straight down
Movement；Rack gear two on drive rod 5 moves straight down, and then rotates counterclockwise with moving gear 1, and then with movable tooth
It takes turns 2 42 to rotate clockwise, and then is rotated counterclockwise with moving gear 3 43；Gear 3 43 rotates counterclockwise, drives and engages
Rack gear one is moved to the left, and then is moved to the left with ovable valve stem 3, and then is moved to the left with movable valve plug 2；It is set until water level in water pool is lower than
Determine water level, at this moment spool is moved to the left the opening of water inlet 11, and water outlet through-hole 12 is also opened, and the water in water inlet line passes through water inlet
Mouth 11 and water outlet through-hole 12 are flowed into pond.
As shown in Fig. 2, floating ball 8 rises when the water level in pond rises, and then connecting rod 7 is driven to rise；Sleeve 9 is even
Upward sliding under the induced effect of extension bar, so control drive rod 5 under the mating reaction of guide groove and guide rod 6 straight up
Movement；Rack gear two on drive rod 5 moves straight up, and then rotates clockwise with moving gear 1, and then with movable tooth
2 42 rotations counterclockwise are taken turns, and then are rotated clockwise with moving gear 3 43；Gear 3 43 rotates clockwise, and drives and engages
Rack gear one moves right, and then moves right with ovable valve stem 3, and then moves right with movable valve plug 2；Until water level in water pool and setting
Water level maintains an equal level, and at this moment spool 2 blocks water inlet 11, and the water in water inlet line no longer passes through water inlet 11 and water outlet through-hole 12 flows into
Into pond.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of screw thread type copper ball-cock assembly characterized by comprising valve body (1), spool (2), valve rod (3), gear drive
(4), drive rod (5), guide rod (6), connecting rod (7) and floating ball (8)；Wherein:
The valve body (1) includes: valve cavity, water inlet (11) and water outlet through-hole (12)；The water inlet (11) is arranged in institute
State the right side of valve cavity；Water outlet through-hole (12) is provided with the bottom end of the valve cavity；
Spool (2) adaptation is mounted on inside the valve cavity；
One end of the valve rod (3) is fixedly connected with the spool (2)；Rack gear is offered on the bottom end side wall of the valve rod (3)
One；
The gear drive (4) is mounted on the bottom end of the valve rod (3), and the gear drive (4) with it is described
Rack gear one engages；
The drive rod (5) is vertically installed at the left side of the gear drive (4)；It is offered on the drive rod (5) perpendicular
Histogram to guide groove；The rack gear being meshed with the gear drive (4) is offered on the right side wall of the drive rod (5)
Two；
The guide rod (6) is fixedly mounted on the valve body (1) inner sidewall；And the guide rod (6) is applied in the drive
In the guide groove of lever (5), controls the drive rod (5) and move up and down vertically；
One end of the connecting rod (7) is hinged on the lateral wall bottom end of the valve body (1)；The other end of the connecting rod (7) connects
It is connected to the floating ball (8)；The bottom end of the drive rod (5) is slidably connected on the connecting rod (7).
2. a kind of screw thread type copper ball-cock assembly according to claim 1, which is characterized in that gear drive (4) packet
It includes: gear one (41), gear two (42) and gear three (43)；The gear one (41), gear two (42) and gear three (43) according to
Secondary engagement installation；And the gear one (41) engages installation with the rack gear two；The gear three (43) and the rack gear one
Engagement installation.
3. a kind of screw thread type copper ball-cock assembly according to claim 1, which is characterized in that the spool (2) close to it is described into
The side at the mouth of a river (11) is inlaid with seal gasket (21)；The seal gasket (21) and the water inlet (11) cooperate.
4. a kind of screw thread type copper ball-cock assembly according to claim 1, which is characterized in that be socketed on the connecting rod (7)
Sleeve (9)；The bottom end of the drive rod (5) is connected on the sleeve (9) by articulation piece.
5. a kind of screw thread type ball-cock assembly according to claim 1, which is characterized in that the floating ball (8) is copper material, by table
The semicircle ball of two of face mechanical polishing is stitched together, and is air inside floating ball.
6. a kind of screw thread type ball-cock assembly according to claim 1, which is characterized in that install the inside of the water inlet (11)
There is filter screen.
7. a kind of screw thread type ball-cock assembly according to claim 1, which is characterized in that the outside of the water inlet (11) is arranged
There is the external screw thread with water inlet pipe cooperation.
8. a kind of screw thread type ball-cock assembly according to claim 1, which is characterized in that the inside of the water inlet (11) is arranged
Have and the matched internal screw thread of water inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811449251.2A CN109442084A (en) | 2018-11-28 | 2018-11-28 | A kind of screw thread type copper ball-cock assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811449251.2A CN109442084A (en) | 2018-11-28 | 2018-11-28 | A kind of screw thread type copper ball-cock assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109442084A true CN109442084A (en) | 2019-03-08 |
Family
ID=65555114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811449251.2A Withdrawn CN109442084A (en) | 2018-11-28 | 2018-11-28 | A kind of screw thread type copper ball-cock assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109442084A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030900A (en) * | 2020-08-26 | 2020-12-04 | 蒋雷 | Gate device for water conservancy |
| CN112942305A (en) * | 2021-02-02 | 2021-06-11 | 武汉理工大学 | Bionic tree-shaped water and soil protection device |
| CN113244995A (en) * | 2021-04-29 | 2021-08-13 | 宁波中苑颜料有限公司 | Grinding device for pigment |
| CN113276562A (en) * | 2021-06-11 | 2021-08-20 | 江苏卡弗数字印刷有限公司 | Printing nozzle device suitable for ink-jet printer |
| CN113669902A (en) * | 2021-09-13 | 2021-11-19 | 中国石油大学胜利学院 | Liquid level balance type collecting condensation water-saving heating furnace |
-
2018
- 2018-11-28 CN CN201811449251.2A patent/CN109442084A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030900A (en) * | 2020-08-26 | 2020-12-04 | 蒋雷 | Gate device for water conservancy |
| CN112942305A (en) * | 2021-02-02 | 2021-06-11 | 武汉理工大学 | Bionic tree-shaped water and soil protection device |
| CN113244995A (en) * | 2021-04-29 | 2021-08-13 | 宁波中苑颜料有限公司 | Grinding device for pigment |
| CN113244995B (en) * | 2021-04-29 | 2022-07-19 | 宁波中苑颜料有限公司 | Grinding device for pigment |
| CN113276562A (en) * | 2021-06-11 | 2021-08-20 | 江苏卡弗数字印刷有限公司 | Printing nozzle device suitable for ink-jet printer |
| CN113669902A (en) * | 2021-09-13 | 2021-11-19 | 中国石油大学胜利学院 | Liquid level balance type collecting condensation water-saving heating furnace |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190308 |
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| WW01 | Invention patent application withdrawn after publication |