CN108019527A - A kind of manual vacuum takes out valve in advance - Google Patents
A kind of manual vacuum takes out valve in advance Download PDFInfo
- Publication number
- CN108019527A CN108019527A CN201711283597.5A CN201711283597A CN108019527A CN 108019527 A CN108019527 A CN 108019527A CN 201711283597 A CN201711283597 A CN 201711283597A CN 108019527 A CN108019527 A CN 108019527A
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- Prior art keywords
- valve
- valve body
- channel
- cone
- passage
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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
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a kind of manual vacuum to take out valve in advance, the first passage, the second channel that are connected with the chamber are equipped with including valve body and valve rod end, the side of the valve body is additionally provided with the third channel being connected with the chamber, the valve rod is arranged in the first passage, seal assembly is equipped with thereon, and the valve rod forms thread seal with the medial surface of the first passage and is connected；One end of the valve rod is equipped with a valve cone, the valve cone is located in the chamber, when the valve rod rotates and rotates the valve cone to the inner side end position of the second channel, the inner side end of the conical surface of the valve cone and the second channel, which is formed, to be tightly connected, and the second channel is separated with the third channel.The present invention forms mating sealing by the valve cone of valve stem end and the inner side end of second channel, and the present invention is sealed using metal conical surface, substantially increases the reliability and durability of whole valve arrangement, processing and fabricating is simple, and cost is low.
Description
Technical field
The present invention relates to vacuum system field, and in particular to a kind of manual vacuum takes out valve in advance, is mainly used for low vacuum pumping
The conversion of vacuum cavity part between pump, fine pumping pump or low-suction pump and fine pumping pump connects.
Background technology
Existing for the valve that vacuumizes is usually ball valve, needle-valve or the larger butterfly valve of bore, and is standard type
Number, interchangeability is stronger, and the metal seal or non-metallic seal at valve seal are standard component, easy to which what is purchased more
Change.But there are following technological deficiency for above-mentioned three kinds of valves：
1) conventional needle-valve, since bore is too small at valve opening, the gas handling capacity in the unit interval is limited, can not meet
The requirement of fast pump；
2) often due to volume is larger, being not suitable for being integrated in inside miniaturization precision instrument makes for ball valve or bigbore butterfly valve
With；
3) existing valve function is single, can only realize air extracting function, and pumping and deflation two can not be realized on same valve body
Kind function；
4) existing valve seal generally use linear sealing, poor reliability, the probability revealed is high, and service life is short.
The content of the invention
For deficiency above of the prior art, the present invention provides one kind can realize pumping and deflation on same valve body
The manual vacuum of two kinds of functions takes out valve in advance.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：
A kind of manual vacuum takes out valve, including valve body and valve rod in advance, and the inside of the valve body is molded a chamber, the valve body two
End is equipped with first passage, the second channel being connected with the chamber, and the side of the valve body is additionally provided with to be connected with the chamber
Logical third channel, the valve rod are arranged in the first passage, are equipped with seal assembly thereon, the valve rod and described the
The medial surface of one passage forms thread seal connection；One end of the valve rod is equipped with a valve cone, and the valve cone is located at the chamber
In, when the valve rod rotates and rotates the valve cone to the inner side end position of the second channel, the conical surface of the valve cone
Formed and be tightly connected with the inner side end of the second channel, the second channel is separated with the third channel.
The valve cone includes cylinder and the cone being connected to each other, and a mounting groove, institute are molded on the cylinder upper surface
The end that mounting groove is placed on the valve rod is stated, and the cylinder and the valve stem end are fixed by a fastener and connected
Connect.
The connecting pin of the valve rod forms a spherical structure, and the spherical structure is arranged in the mounting groove of the valve cone.
Successively equipped with smooth on the direction along the close chamber on the valve rod in the first passage
Face and flank, form a seal clearance, the seal assembly is positioned at described close between the shiny surface and the first passage
Seal in gap；A locking nut being placed on the shiny surface, the locking screw are equipped with the lateral surface of the seal assembly
Female formed with the medial surface of the first passage is threadedly coupled.
The seal assembly includes pressure ring and the tabletting being placed on the shiny surface, and a crush cones are molded in the tabletting
The flank of face, the periphery of the tabletting and the first passage, which is formed, to be tightly connected；The pressure ring shaping one is squeezed with described
The matched extruding inclined-plane of the conical surface is pressed, the inner side end of the locking nut forms end face extrusion fit with the pressure ring.
The tabletting is polytetrafluoroethylene (PTFE).
The valve body includes the first valve body and the second valve body, and the first passage and chamber take shape in first valve body
In, second valve body is coaxially fixed on the chamber opening position of first valve body, and the second channel takes shape in described
In two valve bodies.
The second channel medial end is additionally provided with a 3rd hollow valve body, and the 3rd valve body is coaxially anchored on described
In the second channel in second valve body, its inner wall is formed with second valve body and is tightly connected, and the one of the 3rd valve body
End is extended in the chamber, and the end face of the conical surface of the valve cone and the 3rd valve body forms grafting sealing.
The valve cone is stainless steel, and the 3rd valve body is metal oxygen-free copper material.
A connecting flange is fixed in the free end of second valve body, and the side of first valve body is additionally provided with and the chamber
The exhaust pipe being connected, the third channel are taken shape in the exhaust pipe.
Technical solution of the present invention, has the following advantages that：
A. by establishing first passage, second channel and third channel in valve body in the present invention, valve rod is logical positioned at first
In road, in the end set valve cone of valve rod, the inner side end of valve cone and second channel forms mating sealing, is opened when valve is in
During position, it is set to drive valve cone to depart from second channel by rotary valve rod, second channel is realized with third channel and connected, and can be carried out
Pumping；When rotary valve rod, which makes the inner side end of valve cone and second channel form grafting sealing, to be coordinated, second channel and threeway
Road can separate.The present invention is sealed using metal conical surface, substantially increases the reliability and durability of whole valve arrangement, processing and fabricating
Simply, cost is low.
B. the present invention is provided with flank and shiny surface on valve rod, flank by abluminal compartment setting and with first passage
Female thread is provided with seal assembly and the locking nut for crush seal component on shiny surface, locks into threaded connection
Nut makes valve rod be in sealing state with first passage, certainly, rotary valve rod makes valve cone depart from first by crush seal component
The inner side end of passage, it is possible to achieve the deflation function of valve body, makes ambient atmos enter by third channel and be in high vacuum shape
In state lower chambers, in the higher precision instrument of integrated level, the function of pumping and deflation can be taken into account at the same time.
C. compact-sized, small volume of the invention, it is easy for installation, by locking nut to coordinating inclined-plane between pressure ring and tabletting
Squeezing action, realize valve cone in open position, sealing crimped between valve rod and tabletting, can be in the environment of -50 DEG C to+80 DEG C
Use, use scope is big, and reliability is high with durability.
D. the flange that is connected with second channel or external interface and with third channel connecting flange or external connecing in the present invention
Mouth can need to manufacture according to different, and interchangeability is strong.
Brief description of the drawings
, below will be to needed in embodiment in order to illustrate more clearly of the specific embodiment of the invention
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, for this area
For those of ordinary skill, without creative efforts, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is that vacuum provided by the present invention takes out valve overall structure diagram in advance；
Fig. 2 is the first valve body structure schematic diagram shown in Fig. 1；
Fig. 3 is stem structure schematic diagram shown in Fig. 1；
Fig. 4 is ring structure schematic diagram shown in Fig. 1；
Fig. 5 is tabletting structure schematic diagram shown in Fig. 1.
Description of reference numerals：
1- valve bodies
The first valve bodies of 11-, the second valve bodies of 12-, the 3rd valve bodies of 13-；
2- valve rods
21- spherical structures；
3- chambers；4- first passages；5- second channels；6- third channels；
7- seal assemblies
71- pressure rings, 711- extruding inclined-plane, 72- tablettings, the 721- extruding conical surfaces,
8- valve cones
81- cylinders, 811- mounting grooves, 82- cones；
9- fasteners；10- shiny surfaces, 20- flanks；30- seal clearances；40- locking nuts；
50- connecting flanges；60- exhaust pipes.
Embodiment
Technical scheme is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's all other embodiments obtained without making creative work, belong to the scope of protection of the invention.
As shown in Figure 1, the present invention provides a kind of manual vacuum to take out valve, including valve body 1 and valve rod 2 in advance, in valve body 1
Portion is molded a chamber 3, first passage 4, the second channel 5 being connected with chamber 3 is equipped with 1 both ends of valve body, the side of valve body 1 is also
Equipped with the third channel 6 being connected with chamber 3, third channel can be external exhaust pipe 60 or flange, and valve rod 2 is arranged at
In one passage 4, seal assembly 7 is equipped with thereon, valve rod is realized with first passage 4 by seal assembly 7 and is tightly connected.Such as figure
Shown in 2, internal thread is equipped with first passage, valve rod 2 is equipped with external screw thread, and valve rod 2 and the medial surface of first passage 4 form spiral shell
Line connects；A valve cone 8 is equipped with one end of valve rod 2 at the same time, valve cone 8 is located in chamber 3, by rotary valve rod 2, makes 2 band of valve rod
When dynamic valve cone 8 enters the inner side end position of second channel 5, the conical surface of valve cone 8 is formed with the inner side end of second channel 5 and sealed
Connection, makes second channel 5 separate with third channel 6.The present invention in valve body by establishing first passage 4, second channel 5 and the
Triple channel 6, when valve is in open position, makes it drive valve cone to depart from second channel, second channel and threeway by rotary valve rod
Connection is realized in road, can be evacuated；Coordinate when rotary valve rod makes the inner side end of valve cone and second channel form grafting sealing
When, second channel and third channel can separate.Valve cone of the present invention is preferably the softer metal material of material, here
Preferably oxygen-free copper, since valve cone material is softer, valve cone is stainless steel, and material is harder, and it is close to meet metal in vacuum handbook at this
The requirement of envelope, you can realize the sealing under high vacuum condition.
Being sealed by using metal conical surface, substantially increase the reliability and durability of whole valve arrangement, processing and fabricating is simple,
Cost is low.
Here valve cone 8 includes cylinder 81 and the cone 82 being connected to each other, and an installation is molded on 81 upper surface of cylinder
Groove 811, mounting groove 811 is placed on the end of valve rod 2, and fixes cylinder 81 and 2 end of valve rod by a fastener 9 and connect
Connect.Valve rod as shown in Figure 3, forms a spherical structure at the connecting end surface of valve rod, and spherical structure is placed in the mounting groove of valve cone
In, while annular groove is additionally provided with behind spherical structure, fastener is arranged in annular groove, and valve cone is formed with valve rod and connected, valve
For cone when performing sealing, centering sealing can be better achieved in spherical structure.
Such as the stem structure of Fig. 3, on the valve rod 2 in first passage 4 along on the direction by abluminal compartment 3 successively
Equipped with shiny surface 10 and flank 20, a seal clearance 30 is formed between shiny surface 10 and first passage 4, seal assembly 7 is located at
In seal clearance 30；A locking nut 40 being placed on shiny surface 10, locking nut 40 are equipped with the lateral surface of seal assembly 7
Formed and be threadedly coupled with the medial surface of first passage 4, pass through locking nut crush seal component 7, it is possible to achieve valve rod and valve body
Between sealing.
Seal assembly 7 therein is being pressed as shown in Figure 1, it includes the pressure ring 71 being placed on shiny surface 10 and tabletting 72
The extruding of shaping one conical surface 721 on piece 72, as shown in figure 5, the flank end of the periphery of tabletting 72 and first passage 4 is by stinging
Close to be formed and be tightly connected；As shown in figure 4, shaping one and the matched extruding inclined-plane 711 of the extruding conical surface 721, lock on pressure ring 71
The inner side end of tight nut 40 forms end face extrusion fit with pressure ring 71.Tabletting 72 therein is preferably polytetrafluoroethylene (PTFE), here
Not limited to this, can also be other rubber material.
After valve rod is rotated in place, by screwing locking nut, its end face is set to produce axial compression, pressure ring 71 to pressure ring 71
On extruding inclined-plane 711 can be moved up along the extruding conical surface 721 in tabletting 72, since tabletting is softwood matter, pressure ring 71 is
Metal material, during tabletting is extruded, tabletting can tightly encircle the shiny surface of valve rod, so as to fulfill axial seal, can-
Used in the environment of 50 DEG C to+80 DEG C, use scope is big, and reliability is high with durability.
Valve body 1 in the present invention as depicted in figs. 1 and 2, including the first valve body 11 and the second valve body 12,4 He of first passage
Chamber 3 is taken shape in the first valve body 11, and the second valve body 12 is coaxially fixed on 3 aperture position of chamber of the first valve body 11, and second is logical
Road 5 is taken shape in the second valve body 12, and the valve cone of such valve stem end can realize that grafting is close with the second channel 5 in the second valve body
Envelope.
The present invention is further preferably additionally provided with a 3rd hollow valve body 13, the 3rd valve in 5 medial end of second channel
Body 13 is coaxially anchored in the second channel 5 in the second valve body 12,13 outer wall of the 3rd valve body and 12 inner wall of the second valve body and first
The end of valve body and the end of the second valve body are tightly connected by welding to be formed respectively, and one end of the 3rd valve body 13 extends to chamber
In 3, the end face of the conical surface of valve cone 8 and the 3rd valve body 13 forms grafting sealing, and valve cone here can be preferably stainless steel,
And the 3rd valve body is preferably oxygen-free copper material, since the 3rd valve body material is relatively softer than valve cone, during the two fitted seal, it is more conducive to
Realize the sealing of high quality.
As shown in Figure 1, the present invention fixes a connecting flange 50 in the free end of the second valve body 12, in the side of the first valve body 11
Face is additionally provided with the exhaust pipe 60 being connected with stating chamber 3, and third channel 6 is taken shape in exhaust pipe 60.Vacuum takes out valve point in advance
For Push And Release two states, when pumping valve is in open position in advance first, i.e., threaded stem face presses together with pressure ring tabletting fastening, leads to
The active force of locking nut is crossed, tabletting fastening is pressed in around valve rod by pressure ring, realizes sealing.Then connecting flange will be taken out in advance
It is connected on the high-vacuum pumps such as ionic pump or vacuum cavity, exhaust pipe is connected to the low vacuum mechanical pump of pre- pumping or containing Gao Zhen
In the pre- pumping system of empty aspiration pump, start to be evacuated, after certain high vacuum to be achieved, rotary valve rod, until valve cone fastening is withstood on
On 3rd valve body 13, which is the pre- closed mode for taking out valve, and high-vacuum pump or vacuum cavity are in high vacuum state at this time.
Certainly, in the case where keeping above-mentioned high vacuum state, dismounting is connected with exhaust pipe 60 for high-vacuum pump or vacuum cavity
Low vacuum mechanical pump or the pump containing fine pumping pre- pumping system, exhaust pipe 60 is connected with air.If desired in
High-vacuum pump or vacuum cavity under high vacuum state are deflated, it is only necessary to which rotary valve rod, makes valve cone depart from the 3rd valve body, outside
Boundary's gas can be entered in high-vacuum pump or vacuum cavity by exhaust pipe 60, realize the deflation function of valve.Here locking
Nut and seal assembly remain the sealing state with valve rod in the pumping of whole valve body and deflation course, and in first passage
In position remain unchanged, in the higher precision instrument of integrated level, the function of pumping and deflation can be taken into account at the same time, present invention knot
Structure is compact, small volume, easy for installation.
Obviously, the above embodiments are merely examples for clarifying the description, and the restriction not to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in protection scope of the present invention.
Claims (10)
1. a kind of manual vacuum takes out valve, including valve body (1) and valve rod (2) in advance, the inside of the valve body (1) is molded a chamber (3),
It is characterized in that, valve body (1) both ends are equipped with first passage (4), the second channel (5) being connected with the chamber (3), institute
The side for stating valve body (1) is additionally provided with the third channel (6) being connected with the chamber (3), and the valve rod (2) is arranged at described
In one passage (4), seal assembly (7) is equipped with thereon, and the valve rod (2) and the medial surface of the first passage (4) form spiral shell
Line is tightly connected；One end of the valve rod (2) is equipped with a valve cone (8), and the valve cone (8) is located in the chamber (3), the valve
When bar (2) rotates and rotates the valve cone (8) to the inner side end position of the second channel (5), the cone of the valve cone (8)
The inner side end of face and the second channel (5), which is formed, to be tightly connected, and makes the second channel (5) and the third channel (6)
Partition.
2. manual vacuum according to claim 1 takes out valve in advance, it is characterised in that the valve cone (8) includes what is be connected to each other
Cylinder (81) and cone (82), are molded a mounting groove (811), the mounting groove (811) on cylinder (81) upper surface
The end of the valve rod (2) is placed on, and it is by a fastener (9) that the cylinder (81) and the valve rod (2) end is solid
Fixed connection.
3. manual vacuum according to claim 2 takes out valve in advance, it is characterised in that the connecting pin of the valve rod (2) forms one
Spherical structure (21), the spherical structure (21) are arranged in the mounting groove (811) of the valve cone (8).
4. manual vacuum according to claim 1 takes out valve in advance, it is characterised in that the institute in the first passage (4)
State and be equipped with shiny surface (10) and flank (20), the light successively along on the direction close to the chamber (3) on valve rod (2)
A seal clearance (30) is formed between sliding surface (10) and the first passage (4), the seal assembly (7) is between the sealing
In gap (30)；A locking nut (40) being placed on the shiny surface (10) is equipped with the lateral surface of the seal assembly (7),
The locking nut (40) forms with the medial surface of the first passage (4) and is threadedly coupled.
5. manual vacuum according to claim 4 takes out valve in advance, it is characterised in that the seal assembly (7) includes being placed on
Pressure ring (71) and tabletting (72) on the shiny surface (10), the extruding conical surface of shaping one (721), the pressure on the tabletting (72)
The periphery of piece (72) is formed with the flank of the first passage (4) and is tightly connected；Shaping one and institute on the pressure ring (71)
State matched extruding inclined-plane (711) of the extruding conical surface (721), inner side end and the pressure ring (71) of the locking nut (40)
Form end face extrusion fit.
6. manual vacuum according to claim 5 takes out valve in advance, it is characterised in that the tabletting (72) is polytetrafluoroethylene (PTFE).
7. valve is taken out according to any manual vacuums of claim 1-6 in advance, it is characterised in that the valve body (1) includes first
Valve body (11) and the second valve body (12), the first passage (4) and chamber (3) are taken shape in first valve body (11), described
Second valve body (12) is coaxially fixed on chamber (3) aperture position of first valve body (11), and the second channel (5) takes shape in
In second valve body (12).
8. manual vacuum according to claim 7 takes out valve in advance, it is characterised in that second channel (5) medial end is also
Equipped with a 3rd hollow valve body (13), the 3rd valve body (13) is coaxially anchored on described in second valve body (12)
In two passages (5), its inner wall is formed with second valve body (12) and is tightly connected, and one end of the 3rd valve body (13) extends to
In the chamber (3), the conical surface of the valve cone (8) forms grafting sealing with the end face of the 3rd valve body (13).
9. manual vacuum according to claim 8 takes out valve in advance, it is characterised in that the valve cone (8) is stainless steel, institute
It is metal oxygen-free copper material to state the 3rd valve body (13).
10. manual vacuum according to claim 9 takes out valve in advance, it is characterised in that the free end of second valve body (12)
A connecting flange (50) is fixed, the side of first valve body (11) is additionally provided with the exhaust pipe being connected with the chamber (3)
(60), the third channel (6) is taken shape in the exhaust pipe (60).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711283597.5A CN108019527B (en) | 2017-12-07 | 2017-12-07 | Manual vacuum pre-pumping valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711283597.5A CN108019527B (en) | 2017-12-07 | 2017-12-07 | Manual vacuum pre-pumping valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108019527A true CN108019527A (en) | 2018-05-11 |
| CN108019527B CN108019527B (en) | 2023-07-18 |
Family
ID=62078962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711283597.5A Active CN108019527B (en) | 2017-12-07 | 2017-12-07 | Manual vacuum pre-pumping valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108019527B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH371648A (en) * | 1958-05-30 | 1963-08-31 | Heraeus Gmbh W C | Maximum vacuum valve |
| US20030042449A1 (en) * | 2001-09-06 | 2003-03-06 | Vat Holding Ag | Vacuum control valve |
| CN201827385U (en) * | 2010-11-03 | 2011-05-11 | 川北真空科技(北京)有限公司 | Vacuum manual all-metal valve |
| CN202708101U (en) * | 2012-08-07 | 2013-01-30 | 北京和华腾真空泵压缩机有限公司 | Vacuum-pumping pull valve |
| CN203023508U (en) * | 2012-12-31 | 2013-06-26 | 郑州航诺中流体控制技术有限公司 | Balance type high-pressure stop valve |
| CN204300387U (en) * | 2014-12-01 | 2015-04-29 | 国家电网公司 | Vacuum conical surface sealed transformer stop valve |
| CN105240587A (en) * | 2015-11-13 | 2016-01-13 | 天津智源工贸有限公司 | Vacuumized connecting valve |
| CN106481825A (en) * | 2016-12-08 | 2017-03-08 | 海盐四通管件制造有限公司 | A kind of evacuation negative-pressure type regulating valve |
| CN207569234U (en) * | 2017-12-07 | 2018-07-03 | 北京市北分仪器技术有限责任公司 | A kind of manual vacuum takes out valve in advance |
-
2017
- 2017-12-07 CN CN201711283597.5A patent/CN108019527B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH371648A (en) * | 1958-05-30 | 1963-08-31 | Heraeus Gmbh W C | Maximum vacuum valve |
| US20030042449A1 (en) * | 2001-09-06 | 2003-03-06 | Vat Holding Ag | Vacuum control valve |
| CN201827385U (en) * | 2010-11-03 | 2011-05-11 | 川北真空科技(北京)有限公司 | Vacuum manual all-metal valve |
| CN202708101U (en) * | 2012-08-07 | 2013-01-30 | 北京和华腾真空泵压缩机有限公司 | Vacuum-pumping pull valve |
| CN203023508U (en) * | 2012-12-31 | 2013-06-26 | 郑州航诺中流体控制技术有限公司 | Balance type high-pressure stop valve |
| CN204300387U (en) * | 2014-12-01 | 2015-04-29 | 国家电网公司 | Vacuum conical surface sealed transformer stop valve |
| CN105240587A (en) * | 2015-11-13 | 2016-01-13 | 天津智源工贸有限公司 | Vacuumized connecting valve |
| CN106481825A (en) * | 2016-12-08 | 2017-03-08 | 海盐四通管件制造有限公司 | A kind of evacuation negative-pressure type regulating valve |
| CN207569234U (en) * | 2017-12-07 | 2018-07-03 | 北京市北分仪器技术有限责任公司 | A kind of manual vacuum takes out valve in advance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108019527B (en) | 2023-07-18 |
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