CN107796558A - A kind of pressure gauge protector under vacuum condition - Google Patents
A kind of pressure gauge protector under vacuum condition Download PDFInfo
- Publication number
- CN107796558A CN107796558A CN201711311243.7A CN201711311243A CN107796558A CN 107796558 A CN107796558 A CN 107796558A CN 201711311243 A CN201711311243 A CN 201711311243A CN 107796558 A CN107796558 A CN 107796558A
- Authority
- CN
- China
- Prior art keywords
- pressure gauge
- pedestal
- guide rod
- vacuum condition
- under vacuum
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0618—Overload protection
Abstract
The present invention relates to the pressure gauge protector under a kind of vacuum condition, including the pedestal being connected on pressure vessel, pressure gauge base is connected with the outer end of pedestal, one way valve mechanism is provided between pedestal and pressure gauge base.The present invention by the guide rod being arranged in pedestal be used as one way valve mechanism, effectively protects pressure gauge not come to harm under vacuum, and has when container recovery malleation and can ensure that pressure gauge correctly shows container pressure, normal work.
Description
Technical field
The invention belongs to technical field of pressure detection, is related to pressure gauge protector, under especially a kind of vacuum condition
Pressure gauge protector.
Background technology
Container is divided into malleation force container and vacuum tank, and pressure gauge or detecting instrument can only also detect normal pressure, in container
For vacuum state when pressure gauge it is fragile.
In some anti-pollution and anti-oxidation work flows, as centrifugal atomization produces metal dust.Work flow is
It will first be vacuumized in container, be filled with inert gas, such as argon gas, helium after reaching vacuum requirement, reach defined normal pressure.So
Start to produce the flow of metal dust afterwards.Because vacuum is high, pressure gauge can be caused to damage in vacuum, while also can
Cause container poorly sealed, vacuum does not reach requirement.If not installing pressure gauge, appearance can not be detected when being filled with inert gas
Device pressure, it is difficult to judge whether to meet condition of work.It is usually rule of thumb at present or inflationtime etc. judges container inner pressure,
Container inner pressure value can not be quantified.
Therefore, there is an urgent need to a kind of device that can protect pressure gauge under vacuum by those skilled in the art.
The content of the invention
A kind of the shortcomings that it is an object of the invention to overcome above-mentioned prior art, there is provided the pressure gauge protection under vacuum condition
Device, the connection of certain vacuum degree rear enclosed container and pressure gauge can be reached in container, so as to protect pressure gauge not damage
It is bad, and connection is opened after certain normal pressure is reached, can normal pressure in detection container.
The purpose of the present invention solves by the following technical programs：
Pressure gauge protector under this vacuum condition, including the pedestal being connected on pressure vessel, in the outer of pedestal
End is connected with pressure gauge base, and one way valve mechanism is provided between pedestal and pressure gauge base.
Further, said base is tubular base, the one way valve mechanism include left end insertion pedestal in guide rod with
And it is arranged on the sealing ring of pedestal outer end；The shaft section of the guide rod is T-shape structure, i.e., guide rod right-hand member be provided with
The sealing surface of sealing ring fitted seal；The inner chamber of the pressure gauge base is provided with the mobile cavity for making the guide rod axial movement
Body, it is provided with to limit the limited step of guide rod displacement in the right-hand member of the mobile cavity.
Said base outer end offers the annular groove to fixed seal ring.
The internal diameter of above-mentioned mobile cavity is more than the external diameter of guide rod right-hand member.
Said base is connected by sealing screw thread with pressure gauge base, and the right-hand member of the pressure gauge base is threadedly coupled by sealing
There is pressure gauge.
The right side of above-mentioned guide rod is machined with cross recess.
Coordinate between the left end and pedestal of above-mentioned guide rod for gap.
The invention has the advantages that：
Pressure gauge protector under vacuum condition of the present invention can protect pressure gauge not damage under vacuum conditions, malleation
Under can be with effective detection pressure, normal work.The sealing ring of pedestal right-hand member ensures sealed reliable during container vacuum-pumping, does not leak.
The cross recess of guide rod right side ensures pressure gauge normal work when container fills malleation.
Brief description of the drawings
Fig. 1 protects pressure gauge view in vacuum state for the present invention；
Fig. 2 pressure gauge normal operating conditions schematic diagrames in barotropic state for the present invention.
Wherein：1- pedestals；2- guide rods；3- pressure gauge bases；4- sealing rings.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
Referring to Fig. 1 and Fig. 2：Pressure gauge protector under vacuum condition of the present invention, including be connected on pressure vessel
Pedestal 1, pressure gauge base 3 is connected with the outer end of pedestal 1, and one way valve mechanism is provided between pedestal 1 and pressure gauge base 3.
Wherein pedestal 1 is tubular base, and described one way valve mechanism includes the guide rod 2 in left end insertion pedestal 1 and is arranged on base
The sealing ring 4 of 1 outer end of seat；The shaft section of the guide rod 2 is T-shape structure, i.e. the right-hand member in guide rod 2 is provided with and sealing ring
The sealing surface 2-1 of 4 fitted seals；The inner chamber of the pressure gauge base 3 is provided with the mobile cavity for moving axially the guide rod 2
Body 3-1, it is provided with to limit the limited step 3-2 of the displacement of guide rod 2 in the right-hand member of the mobile cavity 3-1.In pedestal 1
Outer end is offered to the annular groove of fixed seal ring 4.
In the present invention, mobile cavity 3-1 internal diameter is more than the external diameter of the right-hand member of guide rod 2.Pedestal 1 is by sealing screw thread and pressure
Gauge stand 3 connects, and the right-hand member of the pressure gauge base 3 is threaded with pressure gauge by sealing.The right side of guide rod 2 is machined with cross
Groove 2-2.Coordinate between the left end and pedestal 1 of guide rod 2 for gap.
The course of work of the present invention is as follows：
In pressure vessel vacuum, after vacuum reaches certain value in pressure vessel, due to the left side of guide rod 2
Pressure is less than the pressure on right side, and guide rod 2 can be more than guide rod 2 and pedestal by active force to the left when acting on the power on guide rod 2
During 1 frictional force, guide rod is moved to the left to position shown in Fig. 2.Guide rod 2 is adjacent to sealing ring 4, separates the company of container and pressure gauge
Connect, with the reduction of vacuum in container, the power of the compresses seal of guide rod 2 is increasing, ensures sealed reliable, ensures guide rod 2
The pressure on right side does not continue to reduce, and so as to ensure pressure table safety, does not damage.
After vacuum reaches requirement in pressure vessel, start to be filled with inert gas into pressure vessel, as pressure is held
The rise of pressure in device, the pressure of the left and right sides of guide rod 2 moves closer to, when reservoir pressure is more than right atrial pressure or air
During pressure, guide rod 2 is by active force to the right, when acting on the power on guide rod 2 more than the frictional force of guide rod 2 and pedestal 1, guide rod
Move right to position shown in Fig. 1.Gas in pressure vessel can pass through the gap between guide rod 2 and pedestal 1, the right side of guide rod 2
Cross recess 2-2 enter pressure gauge, so as to show the pressure value in pressure vessel.
In summary, the present invention is used as one way valve mechanism by the guide rod being arranged in pedestal, effectively protects pressure
Table does not come to harm under vacuum, and has when container recovers malleation and can ensure that pressure gauge correctly shows container pressure
Power, normal work.
Claims (7)
1. the pressure gauge protector under a kind of vacuum condition, it is characterised in that including the pedestal being connected on pressure vessel
(1) pressure gauge base (3), is connected with the outer end of pedestal (1), one-way cock is provided between pedestal (1) and pressure gauge base (3)
Mechanism.
2. the pressure gauge protector under vacuum condition according to claim 1, it is characterised in that the pedestal (1) is
Tubular base, the one way valve mechanism include the guide rod (2) in left end insertion pedestal (1) and are arranged on pedestal (1) outer end
The sealing ring (4) in portion；The shaft section of the guide rod (2) is T-shape structure, i.e. the right-hand member in guide rod (2) is provided with and sealing ring
(4) sealing surface (2-1) of fitted seal；The inner chamber of the pressure gauge base (3) is provided with to move axially the guide rod (2)
Mobile cavity (3-1), be provided with to limit the spacing of guide rod (2) displacement in the right-hand member of the mobile cavity (3-1)
Step (3-2).
3. the pressure gauge protector under vacuum condition according to claim 2, it is characterised in that the pedestal (1) is outside
End is offered to the annular groove of fixed seal ring (4).
4. the pressure gauge protector under vacuum condition according to claim 2, it is characterised in that the mobile cavity
The internal diameter of (3-1) is more than the external diameter of guide rod (2) right-hand member.
5. the pressure gauge protector under vacuum condition according to claim 2, it is characterised in that the pedestal (1) is logical
Cross sealing screw thread to be connected with pressure gauge base (3), the right-hand member of the pressure gauge base (3) is threaded with pressure gauge by sealing.
6. the pressure gauge protector under vacuum condition according to claim 2, it is characterised in that the guide rod (2)
Right side is machined with cross recess (2-2).
7. the pressure gauge protector under vacuum condition according to claim 2, it is characterised in that the guide rod (2)
Coordinate between left end and pedestal (1) for gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711311243.7A CN107796558A (en) | 2017-12-12 | 2017-12-12 | A kind of pressure gauge protector under vacuum condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711311243.7A CN107796558A (en) | 2017-12-12 | 2017-12-12 | A kind of pressure gauge protector under vacuum condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107796558A true CN107796558A (en) | 2018-03-13 |
Family
ID=61537647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711311243.7A Pending CN107796558A (en) | 2017-12-12 | 2017-12-12 | A kind of pressure gauge protector under vacuum condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107796558A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550584A (en) * | 2020-05-19 | 2020-08-18 | 淄博真空设备厂有限公司 | Check valve for inlet pipeline of liquid ring vacuum system |
-
2017
- 2017-12-12 CN CN201711311243.7A patent/CN107796558A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550584A (en) * | 2020-05-19 | 2020-08-18 | 淄博真空设备厂有限公司 | Check valve for inlet pipeline of liquid ring vacuum system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180313 |
|
| WD01 | Invention patent application deemed withdrawn after publication |