CN2881152Y - Anti-backflow air intake nozzle of vacuum pump - Google Patents
Anti-backflow air intake nozzle of vacuum pump Download PDFInfo
- Publication number
- CN2881152Y CN2881152Y CN 200620100720 CN200620100720U CN2881152Y CN 2881152 Y CN2881152 Y CN 2881152Y CN 200620100720 CN200620100720 CN 200620100720 CN 200620100720 U CN200620100720 U CN 200620100720U CN 2881152 Y CN2881152 Y CN 2881152Y
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- CN
- China
- Prior art keywords
- air inlet
- vacuum pump
- intake
- adjustment part
- cavity
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- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to an anti-backflow air intake nozzle of vacuum pump which belongs to the technical field of vacuum pump, in particular to an intake nozzle which is connected with the inlet of the vacuum pump. The utility model comprises an intake nozzle cavity(1). An intake regulate member(3) is provided at the joining of the intake nozzle cavity(1) and the inlet of the vacuum pump. The intake regulate member is arranged in a cavity under the intake channel, the head of the intake regulate member is seated in the match seat(2) in the intake channel and an elastic retainer ring(4) is arranged at the back end of the intake regulate member. The intake nozzle of vacuum pump in the utility model uses a simple structure to avoid backflow of pump liquid when the pumping is finished, so as to ensure the cleanness and safety of the vacuum system.
Description
Technical field
The utility model belongs to vacuum pump part, is specifically related to the anti-vacuum pump air inlet nozzle that backflows.
Background technique
At present, the oil-sealed rotary pump of vacuum industry adopts fluids such as oil, water or other polymer to serve as the working medium of pump, cooling in the pump housing, sealing or lubrication, the expansion of sending out the palm and vacuum application field along with science and technology, the problem that urgent need will solve appears in the extract system of existing machinery vacuum pump and composition, is exactly that pumped gas or liquid flow direction produce opposite flowing, and backflows to and is taken out container, influence the quality of product, increased the maintenance cost of equipment.
The solution of prior art is the inlet at pump, baffle plate is set is used to reduce and backflows or add that at the oil seal type vacuum pump annex of cold-trap or adsorption trap class or valve prevent to backflow, but can not thoroughly solve the problem of backflowing, and make system more complicated.
Summary of the invention
The utility model purpose provides a kind of anti-air inlet nozzle simple in structure, easy to assembly that backflows of vacuum pump that is used for, the backflowing of can block bleeds when finishing shutdown pump liquid.
For achieving the above object, the utility model adopts following scheme:
The anti-air inlet nozzle that backflows of a kind of vacuum pump, be connected in vacuum pump inlet, comprise the air inlet nozzle cavity, it is characterized in that air inlet nozzle cavity and vacuum pump inlet joint are provided with the air inlet adjustment part, the air inlet adjustment part places in the cavity of gas-entered passageway below, the front end of air inlet adjustment part is seated at corresponding gas-entered passageway seat surface, and the rear end is provided with circlip.
The utility model adopts the gas-entered passageway below that one air inlet adjustment part is set, when closing shutdown when bleeding, the air inlet adjustment part is pressed on the seat surface of gas-entered passageway, seat surface is the sealing surface of air inlet adjustment part and gas-entered passageway port, has blocked the working medium that backflows or other impurity well and has entered and taken out container.
Above-mentioned air inlet adjustment part is an elastic sphere, and seat surface is an axisymmetric curved surface.Or the air inlet adjustment part is planar wafer, and seat surface is corresponding elastic surface.Such design makes that the sealing effect of air inlet adjustment part and gas-entered passageway is good, and is durable in use.
Further, the below of gas-entered passageway is fixed with air inlet screen, can establish an O shape circle at the front end of air inlet screen, and O shape circle can make whole air inlets just enter the pump housing behind air inlet screen.
What the utility model provided is used for by at vacuum pump gas-entered passageway mouth the effect that one air inlet adjustment part plays check valve being set, working solution and air backflow to vacuum system when preventing termination of pumping or unexpected the power failure effectively, thereby cause vacuum system destroyed by the contamination of working fluid and degree of vacuum, and simple in structure, cost is low, easy to assembly.
Description of drawings
Fig. 1 is the utility model one embodiment's a structural representation
Fig. 2 is the schematic representation under in working order shown in Figure 1
Fig. 3 is the explosive view of the anti-air inlet nozzle that backflows of vacuum pump shown in Figure 1
The vacuum pump air inlet nozzle comprises air inlet nozzle cavity 1, and its center connects and is gas-entered passageway 2, and the lower end of gas-entered passageway 2 is communicated with a cavity.A ccontaining air inlet adjustment part 3 in the cavity, the maximum diameter of air inlet adjustment part 3 be less than cavity, and greater than gas-entered passageway 2, bleeding when closing, and connects when being taken out container and being negative pressure state, and air inlet adjustment part 3 closely is pressed on the seat surface 21 of gas-entered passageway 2 ports.Air inlet adjustment part 3 rear ends are fixed in the cavity by O shape circle 6 and circlip for hole 4, are air inlet screen 5 between O shape circle 6 and the circlip for hole 4.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
The anti-air inlet nozzle that backflows of a kind of vacuum pump, comprise air inlet nozzle cavity 1, air inlet adjustment part 3 and hole back-up ring 4 and air inlet screen 5, valve cavity 1 center breakthrough form becomes gas-entered passageway 2, gas-entered passageway 2 hypomeres become the big cavity that forms by one section tapered diameter, air inlet adjustment part 2 places in the cavity, the front end of air inlet adjustment part 3 is seated at the taper seat surface 21 of corresponding gas-entered passageway port, the rear end is O shape circle 6, air inlet screen 5 and circlip for hole 4, air inlet screen 5 is between O shape circle 6 and circlip for hole 4, and circlip 4 is limited in air inlet adjustment part 3 in the cavity.
Air inlet adjustment part 3 is an elastic sphere, and seat surface 21 is an axisymmetric curved surface, and when air inlet adjustment part 3 front ends and gas-entered passageway 2 were negative pressure, elastic sphere and axisymmetric curved surface can be combined closely, and blocking-up is backflowed.
The anti-air inlet nozzle that backflows of above-mentioned vacuum pump is connected in the vacuum pump inlet place, and after the start, air inlet adjustment part 3 leaves seat surface 21, and pumped gas enters cavity from gas-entered passageway 2, filters back output from air inlet screen.
Vacuum pump work finishes, and during shutdown, it is negative pressure state that the quilt of connection is taken out container, and air inlet adjustment part 3 just is pressed on the seat surface 21, has blocked the vacuum pump pump housing and gas-entered passageway 2, efficiently solves the problem of backflowing of vacuum pump.
Claims (4)
1, the anti-air inlet nozzle that backflows of a kind of vacuum pump, be connected in vacuum pump inlet, comprise air inlet nozzle cavity (1), it is characterized in that air inlet nozzle cavity (1) and vacuum pump inlet joint are provided with air inlet adjustment part (3), the air inlet adjustment part places in the cavity of gas-entered passageway (2) below, the front end of air inlet adjustment part is seated at corresponding gas-entered passageway seat surface (21), and the rear end is provided with circlip (4).
2, the anti-air inlet nozzle that backflows of vacuum pump as claimed in claim 1 is characterized in that air inlet adjustment part (3) is an elastic sphere, and seat surface (21) is an axisymmetric curved surface.
3, the anti-air inlet nozzle that backflows of vacuum pump as claimed in claim 1 is characterized in that air inlet adjustment part (3) is a planar wafer, and seat surface (21) is corresponding elastic surface.
4, as the anti-air inlet nozzle that backflows of the described vacuum pump of one of claim 1～3, its feature is fixed with air inlet screen (5) below gas-entered passageway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620100720 CN2881152Y (en) | 2006-01-24 | 2006-01-24 | Anti-backflow air intake nozzle of vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620100720 CN2881152Y (en) | 2006-01-24 | 2006-01-24 | Anti-backflow air intake nozzle of vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2881152Y true CN2881152Y (en) | 2007-03-21 |
Family
ID=37880991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620100720 Expired - Lifetime CN2881152Y (en) | 2006-01-24 | 2006-01-24 | Anti-backflow air intake nozzle of vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2881152Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973701A (en) * | 2017-12-28 | 2019-07-05 | 蓝色海洋（天津）工程技术有限公司 | A kind of direct burial anticorrosive valve |
| CN111419598A (en) * | 2020-03-26 | 2020-07-17 | 青岛市妇女儿童医院（青岛市妇幼保健院、青岛市残疾儿童医疗康复中心、青岛市新生儿疾病筛查中心） | Transparent heat preservation phototherapy protection casing of far infrared radiation platform |
-
2006
- 2006-01-24 CN CN 200620100720 patent/CN2881152Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973701A (en) * | 2017-12-28 | 2019-07-05 | 蓝色海洋（天津）工程技术有限公司 | A kind of direct burial anticorrosive valve |
| CN111419598A (en) * | 2020-03-26 | 2020-07-17 | 青岛市妇女儿童医院（青岛市妇幼保健院、青岛市残疾儿童医疗康复中心、青岛市新生儿疾病筛查中心） | Transparent heat preservation phototherapy protection casing of far infrared radiation platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070321 |
|
| EXPY | Termination of patent right or utility model |