CN206054724U - A kind of negative pressure sealing device for housing of confined space - Google Patents
A kind of negative pressure sealing device for housing of confined space Download PDFInfo
- Publication number
- CN206054724U CN206054724U CN201621001363.8U CN201621001363U CN206054724U CN 206054724 U CN206054724 U CN 206054724U CN 201621001363 U CN201621001363 U CN 201621001363U CN 206054724 U CN206054724 U CN 206054724U
- Authority
- CN
- China
- Prior art keywords
- confined space
- pipe joint
- rod
- sealing device
- housing
- 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.)
- Active
Links
Landscapes
- Gasket Seals (AREA)
Abstract
A kind of negative pressure sealing device for housing of confined space that this utility model is provided, including confined space, are arranged the opening communicated with confined space, sealing device are provided with opening on the tank wall of confined space, it is characterised in that：The sealing device includes the pipe joint I being connected at opening on tank wall, is provided with the air extracting seal screw rod to being evacuated in confined space, air extracting seal screw rod and arranges " O " the type sealing ring for preventing gas backstreaming in pipe joint I.Air in confined space can be extracted out by this utility model, make the air pressure in confined space be less than external atmosphere pressure.When being applied in reductor, when reductor runs, heating gas expansion makes the air pressure in reductor no longer extrude gear oil still less than external atmosphere pressure outward.
Description
Technical field
It is close that this utility model is related to a kind of reductor for being used in sealing, closed machinery, deep-sea, deep space anti-leak
The negative pressure sealing device for housing of confined space such as seal, pack.
Background technology
Traditional reductor sealing is, when reductor assembling is completed, to stamp fluid sealant, Ran Houzai in the faying face of casing
Injection gear oil, during full seal type reductor operates, generates heat as high-speed gear rotates, is sealed in gas in reductor
Body will expand so that the air pressure in reductor is more than extraneous atmospheric pressure, and produces gear oil and easily leak.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of air in confined space and extracts, and makes closed
A kind of sealing device of the pressure in space less than ambient pressure.
The purpose of this utility model is realized in the following manner：
A kind of negative pressure sealing device for housing of confined space, including confined space 5, arrange on the tank wall of confined space 5 with it is closed
The opening that space 5 communicates, is provided with sealing device at opening, the sealing device includes that the pipe being connected at opening on tank wall connects
I 7, the air extracting seal screw rod 8 to being evacuated in confined space 5 is provided with pipe joint I 7, is arranged in air extracting seal screw rod 8
Prevent " O " the type sealing ring 3 of gas backstreaming.
It is described to be evacuated closed 8 tip male thread of screw rod connection clamp nut 1, make pumping closed by turn clamp nut 1
Screw rod 8 is stretched out into confined space 5 along the axis direction of pipe joint I 7.
The air extracting seal screw rod 8 includes the upper and lower being wholely set, and top is the bar being arranged in pipe joint I 7
Shape screw rod, rod-shaped screw tip male thread connection clamp nut 1, is bleed-off passage inside rod-shaped screw, and bleed-off passage bottom sets
Put the pore being in communication with the outside, rod-shaped screw bottom is gasket seal, rod-shaped screw is moved down along I 7 axis of pipe joint, made close
Gasket is separated with I 7 bottom of pipe joint, and pore is communicated with confined space 5；Or rod-shaped screw is moved upwards along I 7 axis of pipe joint
It is dynamic, gasket seal is contacted with I 7 sealed bottom of pipe joint, pore is isolated with confined space 5.
Seal washer 4 is set between the rod-shaped screw and pipe joint I 7.
There is between the pipe joint I 7 and rod-shaped screw space, spring 6 is installed in space, the bottom of spring 6 compresses
On pipe joint I 7, the top of spring 6 is pressed on the shaft block ring of rod-shaped screw.
Relative to prior art, the air in confined space can be extracted out by this utility model, make the gas in confined space
Pressure is less than external atmosphere pressure.When being applied in reductor, when reductor runs, heating gas expansion makes the air pressure in reductor
Gear oil is extruded still less than external atmosphere pressure outward no longer.
Description of the drawings
Fig. 1 is sealing state schematic diagram of the present utility model.
Fig. 2 is pumping view of the present utility model.
Wherein, 1 is clamp nut；2 is seal washer II, and 3 is " O " type sealing ring, and 4 is seal washer I, and 5 is confined air
Between, 6 is spring, and 7 is pipe joint I, and 8 is air extracting seal screw rod, and 9 is pipe joint II.
Specific embodiment
This utility model provides a kind of negative pressure sealing device for housing of confined space, for the air in confined space is extracted out,
Make the atmospheric pressure in confined space less than extraneous air pressure, when the air heats in confined space, can still make inside
Heated air atmospheric pressure be not more than extraneous air pressure.
The negative pressure sealing device for housing of confined space of the present utility model, is a kind of manual negative pressure sealing device for housing, and it includes close
Space 5 is closed, opening is set on confined space, sealing device is set at opening.Sealing device includes pipe joint I 7, and pipe joint I 7 is solid
Surely be connected on the tube wall at opening, in order to increase the steadiness of connection, the top of pipe joint I 7 be provided with outside confined space
The boss of wall contact, arranges seal washer II between boss and the outer wall of confined space.
Air extracting seal screw rod 8, the inner hollow of air extracting seal screw rod 8, for connecting filling for outside are set in pipe joint I 7
Device of air arranges " O " type sealing ring 3 to being evacuated in confined space 5, in air extracting seal screw rod 8, for confined space 5
When interior air is evacuated, air extracting seal screw rod 8 is sealed, prevent extraneous air from entering in confined space 5.Pumping is close
8 tip male thread of screw rod connection clamp nut 1 is closed, and by turn clamp nut 1, the closed screw rod 8 of pumping is made along pipe joint I 7
Axis direction is stretched out into confined space 5, and sealing 8 oral area of screw rod is provided with female thread, the air extractor connection pumping outside convenience
Sealing screw rod is evacuated.
Air extracting seal screw rod 8 includes upper and lower, and top is the rod-shaped screw being arranged in pipe joint I 7, rod-shaped screw
Inner hollow, rod-shaped screw tip male thread connection clamp nut 1, is bleed-off passage inside rod-shaped screw, bleed-off passage bottom
The pore that setting is in communication with the outside, rod-shaped screw bottom are gasket seal.
When manual turn clamp nut 1, rod-shaped screw is made to move down along I 7 axis of pipe joint when being evacuated, sealing gasket
Piece is separated with I 7 bottom of pipe joint, and the pore of bleed-off passage bottom is communicated with confined space 5, is connect by the exhaust tube of external connection
9 are evacuated, period, and " O " type sealing ring 3 is used to prevent the strong air of external high pressure from entering 5 inwall of confined space；Pumping is completed
When, rod-shaped screw is moved up along I 7 axis of pipe joint, gasket seal is contacted with I 7 sealed bottom of pipe joint, disconnect pore with
The passage of confined space 5.
Wherein, in order to create significantly more efficient sealed environment, seal washer 4 is set between sealing screw rod and pipe joint I 7.
There is between pipe joint I 7 and rod-shaped screw space, spring 6, bottom and the pipe joint I of spring 6 are installed in space
7 endoporus bottom surfaces mutually compress, and top and the rod-shaped screw pad of spring 6 are mutually compressed.During pumping, turn clamp nut 1.Pressure pumping
Sealing screw rod 8, spring 6 are compressed, after the completion of pumping, screw clamp nut 1, by air extracting seal with the help of 6 elastic force of spring
Screw rod is taken out of upwards, returns to the sealing state shown in Fig. 1.
Above-described is only preferred implementation of the present utility model, it is noted that for those skilled in the art
For, under the premise of without departing from this utility model general idea, some changes and improvements can also be made, these should also be considered as
Protection domain of the present utility model.
Claims (5)
1. a kind of negative pressure sealing device for housing of confined space, including confined space（5）, confined space（5）Tank wall on arrange with it is close
Close space（5）The opening for communicating, is provided with sealing device at opening, it is characterised in that：The sealing device includes being connected to out
Pipe joint I at mouthful on tank wall（7）, pipe joint I（7）Inside it is provided with to confined space（5）The air extracting seal spiral shell being inside evacuated
Bar（8）, air extracting seal screw rod（8）It is interior that " O " the type sealing ring for preventing gas backstreaming is set（3）.
2. the negative pressure sealing device for housing of confined space according to claim 1, it is characterised in that：It is described to be evacuated closed screw rod
（8）Tip male thread connects clamp nut（1）, by turn clamp nut（1）Make the closed screw rod of pumping（8）Along pipe joint I（7）
Axis direction to confined space（5）Inside stretch out.
3. the negative pressure sealing device for housing of confined space according to claim 2, it is characterised in that：The air extracting seal screw rod
（8）Including the upper and lower being wholely set, top is to be arranged on pipe joint I（7）Interior rod-shaped screw, it is outer at the top of rod-shaped screw
Threaded connection clamp nut（1）, it is bleed-off passage inside rod-shaped screw, bleed-off passage bottom arranges the pore being in communication with the outside,
Rod-shaped screw bottom is gasket seal, and rod-shaped screw is along pipe joint I（7）Axis is moved down, and makes gasket seal and pipe joint I
（7）Bottom separates, pore and confined space（5）Communicate；Or rod-shaped screw is along pipe joint I（7）Axis is moved up, and makes sealing
Pad and pipe joint I（7）Sealed bottom contact, pore and confined space（5）It is isolated.
4. the negative pressure sealing device for housing of confined space according to claim 3, it is characterised in that：The rod-shaped screw is connect with pipe
I（7）Between seal washer is set（4）.
5. the negative pressure sealing device for housing of confined space according to claim 3, it is characterised in that：The pipe joint I（7）With bar
There is between shape screw rod space, spring is installed in space（6）, spring（6）Bottom be pressed on pipe joint I（7）On, spring
（6）Top be pressed on the shaft block ring of rod-shaped screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621001363.8U CN206054724U (en) | 2016-08-31 | 2016-08-31 | A kind of negative pressure sealing device for housing of confined space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621001363.8U CN206054724U (en) | 2016-08-31 | 2016-08-31 | A kind of negative pressure sealing device for housing of confined space |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206054724U true CN206054724U (en) | 2017-03-29 |
Family
ID=58379213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621001363.8U Active CN206054724U (en) | 2016-08-31 | 2016-08-31 | A kind of negative pressure sealing device for housing of confined space |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206054724U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534961A (en) * | 2018-05-24 | 2018-09-14 | 深圳巴斯巴汽车电子有限公司 | The quick helium mass spectrum leak detection device of multistation self sealss |
| CN109205119A (en) * | 2018-09-14 | 2019-01-15 | 南京新核复合材料有限公司 | A kind of tank body inflation pressure maintaining sealing axis |
| CN112747107A (en) * | 2020-12-28 | 2021-05-04 | 河北工业大学 | Pressure pumping structure and pressure pumping method for speed reducer |
-
2016
- 2016-08-31 CN CN201621001363.8U patent/CN206054724U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534961A (en) * | 2018-05-24 | 2018-09-14 | 深圳巴斯巴汽车电子有限公司 | The quick helium mass spectrum leak detection device of multistation self sealss |
| CN109205119A (en) * | 2018-09-14 | 2019-01-15 | 南京新核复合材料有限公司 | A kind of tank body inflation pressure maintaining sealing axis |
| CN112747107A (en) * | 2020-12-28 | 2021-05-04 | 河北工业大学 | Pressure pumping structure and pressure pumping method for speed reducer |
| CN112747107B (en) * | 2020-12-28 | 2022-04-29 | 河北工业大学 | Pressure pumping structure and pressure pumping method for speed reducer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206054724U (en) | A kind of negative pressure sealing device for housing of confined space | |
| CN202081851U (en) | Polish rod sealing apparatus | |
| CN205192693U (en) | End cap is examined to expandable gas | |
| CN205534739U (en) | Seal structure of two -way flange and packing box | |
| CN102944370A (en) | Pressure device for airtightness detection of casing and manufacturing method thereof | |
| CN207144912U (en) | One kind linkage packer note adopts integrated pump | |
| CN207880288U (en) | A kind of pipeline internal expansion type leak detection seal plug | |
| CN202531080U (en) | Wellhead sealing hanger | |
| CN201802348U (en) | Removable internal oil tube stopper | |
| CN208816767U (en) | Multifunctional inflating gas nozzle | |
| CN204283318U (en) | High temperature high voltage resistant tubing packer | |
| CN208247561U (en) | A kind of overload jointing mechanism | |
| CN207161591U (en) | A kind of automatic air-compensating type air gas spring | |
| CN203594402U (en) | Oil tube plugging device | |
| CN106321789B (en) | The negative pressure sealing device for housing of confined space | |
| CN201170413Y (en) | Pipe cap | |
| CN206169021U (en) | Multistage sealing device of internal high -pressure forming | |
| CN207261345U (en) | A kind of integrated hydraulic control cylinder | |
| CN205743820U (en) | A kind of down-hole plugging device | |
| CN205955690U (en) | Adjustable setting force value fracturing packer | |
| CN114607848B (en) | Combined air-expanding sealing device | |
| CN204082071U (en) | A kind of wellhead packing box of producing well | |
| CN203037425U (en) | Casing tightness detection and pressurization device | |
| CN105697904A (en) | Sealed connection device for compressed air aluminium alloy pipelines | |
| CN205998404U (en) | Carry the vacuum bag into outgassing nonreturn valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |