CN208383383U - Detect the connection terminal of vacuum degree - Google Patents
Detect the connection terminal of vacuum degree Download PDFInfo
- Publication number
- CN208383383U CN208383383U CN201721895940.7U CN201721895940U CN208383383U CN 208383383 U CN208383383 U CN 208383383U CN 201721895940 U CN201721895940 U CN 201721895940U CN 208383383 U CN208383383 U CN 208383383U
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- China
- Prior art keywords
- filament
- vacuum degree
- connection terminal
- helical
- shell
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Abstract
The utility model relates to examine detection technique field more particularly to a kind of connection terminal for detecting vacuum degree.It can be seen from the above technical scheme that the support terminals in the utility model are threaded through on shell and supporting element, it is ensured that in vibration, the helical filament and the first supporting mechanism synchronous vibration prevent helical filament to be pulled off；Filament is helical structure, and vibration can be effectively prevented, and avoids being pulled off, while increasing contact area, reduces the length of whole device, has saved cost.
Description
Technical field
The utility model relates to examine detection technique field more particularly to a kind of connection terminal for detecting vacuum degree.
Background technique
Vacuum meter also known as vacuum meter are the instruments of measurement of vacuum or air pressure.Usually utilize gas under different air pressures
The variation of certain physical effect carries out the measurement of air pressure.Pirani ga(u)ge is also referred to as resistance-type vacuum gauge, its working principle is that: it is true
Reciprocal of duty cycle is different, and the air molecule number in unit volume is just different, and the ability (heat dissipation of heat is taken away for the resistance wire to generate heat
Ability) it is just different, wire temperature is just different, because the resistivity of resistance wire is the function of temperature, different vacuum degrees
The difference of resistivity is just caused, then resistance is just different, and pressure drop of the electric current on resistance wire is just different, just according to the variation of voltage
Atmospheric pressure, that is, measurement of vacuum can be conversed.Existing Pirani ga(u)ge mostly uses greatly the hot filament of linear type, and
In measurement process, uncontrollable vibration is often had, the hot filament in vacuum meter can be had an impact, lead to its fracture, thus
Influence detection.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of vacuum degree measurement precision, and high, pressure change sends out Ying Xun
The connection terminal of detection vacuum degree that is fast, can effectively resisting external vibration.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the utility model to solve the technical problem is as follows:
It is a kind of detect vacuum degree connection terminal be installed to including the shell being mounted on object to be detected with shell
Direction on object to be measured keeps the first seal of the air-tightness on rear side of shell for front, wears in the first seal
Equipped with support terminals, helical filament is connected in the support terminals, second seal, institute are run through in the front end of the support terminals
It states second seal and is equipped with the supporting element for being used to support the helical filament.
The helical filament includes the first filament and the second filament as a further improvement of the utility model, and described the
One filament and the second filament are double-spiral structure, and first filament is connect by third filament with the second filament.
First filament and the second filament are connect with lead respectively as a further improvement of the utility model, described
Lead is connect with the support terminals, and the central axis of the conveyor screw is parallel with support terminals.
The helical filament is the secondary winding body composition of filament as a further improvement of the utility model, and filament is secondary
Winding body is made of winding body of 1 filament.
The supporting element is cylinder-like structure as a further improvement of the utility model, comprising integrally formed branch
Helical filament is simultaneously accommodated in supporting element by support part and interconnecting piece, and opening is offered on the interconnecting piece.
The support portion is equipped with the clamping part for fixing helical filament as a further improvement of the utility model,
Part, the hold assembly are connect with the helical filament.
As a further improvement of the utility model, the housing outer surface be equipped with screw thread, the screw thread with it is to be measured
Object is docked to generate vacuum-tight seal.
Annular vibration component on the shell as a further improvement of the utility model, the annular vibration component are set
It sets in the front end of the shell.
The support terminals are equipped with reinforcement feature as a further improvement of the utility model, and the reinforcement feature is
Rod-like structure, the reinforcement feature are vertical setting with the support terminals.
The utility model additionally provides a kind of vacuum pressure sensor, the connecting pin including above-mentioned detection vacuum degree
Son.
It can be seen from the above technical scheme that the support terminals in the utility model are threaded through on shell and supporting element,
It can guarantee in vibration, the helical filament and the first supporting mechanism synchronous vibration prevent helical filament to be pulled off；
Filament is helical structure, and vibration can be effectively prevented, and avoids being pulled off, while increasing contact area, is reduced
The length of whole device, has saved cost；
Helical filament carries temperature-compensating, improves the utilization rate of the energy, so that signal stabilization, vacuum degree measurement precision is high,
It is suitble to remote transmission signal；Helical filament thermal capacity is small simultaneously, so that helical filament becomes pressure during detecting vacuum degree
Changing hair should be rapid.External vibration can effectively be resisted
Detailed description of the invention
Fig. 1 is a kind of connection terminal structural schematic diagram for detecting vacuum degree of the utility model.
Fig. 2 is the enlarged diagram in Fig. 1.
Description of symbols: 1- shell, 11- first seal, 12- annular vibration component, 13- screw thread, 2- support terminals,
21- reinforcement feature, 3- supporting element, 31- second seal, 32- hold assembly, 33- interconnecting piece, 34- helical filament, 35- winding
Body, 4- control circuit, 5- spiral cover, the contact 51-
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, so that those skilled in the art
The utility model may be better understood and can be practiced, but illustrated embodiment is not as the restriction to the utility model.
Refering to fig. 1, Fig. 2, a kind of connection terminal detecting vacuum degree, including the shell 1 being mounted on object to be detected,
The direction being installed on object to be measured using shell 1 keeps the first seal 11 of the air-tightness of 1 rear side of shell, institute as front
It states and is equipped with support terminals 2 in first seal 11, helical filament 34, the support terminals 2 are connected in the support terminals 2
Front end run through second seal 31, the second seal 31, which is equipped with, is used to support the supporting element 3 of the helical filament 34,
The overall length part in the longitudinal direction of the helical filament 34 is housed in the supporting element 3, can be reduced because of helical filament
Measurement caused by the difference of 34 installations is uneven, while supporting element 3 can make spiral shell to the heat that 34 compensation gas of helical filament seizes
It is small to revolve 34 range of temperature of filament, guarantees 34 service performance of helical filament, so that it is detected stability more preferable.
The first seal 11 and second seal 31 are equipped with the through-hole for accommodating support terminals 2, the through-hole
It is equipped with insulator, the support terminals 2 are threaded through on the insulator, and the first seal 11 and second seal 31 are divided
It is not hermetically sealed shell 1, supporting element 3.
The shell 1 is installed to the direction on object to be measured equipped with an open end, and the open end side protrudes into be detected
In tested quantity space inside object, the gas in helical filament 34 and tested quantity space forms contact condition.On shell 1
One sealing element 11 plays the role of as the next door between the atmosphere outside tested quantity space and shell 1.
The embodiment of the utility model be the helical filament 34 include the first filament and the second filament, first filament with
Second filament is double-spiral structure, and first filament is connect by third filament with the second filament.
Helical filament 34 carries temperature-compensating, improves the utilization rate of the energy, so that signal stabilization, vacuum degree measurement precision
Height is suitble to remote transmission signal；34 thermal capacity of helical filament is small simultaneously, so that helical filament 34 is right during detecting vacuum degree
Pressure change hair should be rapid.
First filament and the second filament are connect with lead respectively, and the lead is connect with the support terminals 2, described
The central axis of conveyor screw is parallel with support terminals 2.
The central axis of the conveyor screw structural strength that may make helical filament 34 parallel with support terminals 2 is higher, and stability is good,
Its service performance is improved, while the influence of mechanical stress can be reduced.
Another program of the utility model is that the helical filament 34 is that the secondary winding body 35 of filament forms, and filament is secondary to be twined
It is made of around body 35 winding body 35 of 1 filament.
The helical filament 34 is that the secondary winding body 35 of filament forms, and the screw pitch coefficient of the winding body 35 of the filament is less than
The screw pitch coefficient of helical filament 34, and the ratio between minimum pitch of the helical filament 34 at inner ring and filament diameter >=1.5.
For helical filament 34, therefore the helical filament 34 that the secondary winding body 35 of filament forms can be in high temperature work
Intensity still with higher under condition, therefore even if the screw pitch coefficient of the winding body 35 of filament is less than the screw pitch system of helical filament 34
Number, helical filament 34 will not sagging deflections due to gravity under high-order operating condition.
The utility model can also solve helical filament 34 due to using with this by increasing supporting point to helical filament 34
The problem of strength and deformation.
When the helical filament 34 used in above-mentioned two scheme increases filament heating power with object vacuum environment to be detected
Contact area, while 34 thermal capacity of helical filament is small, so that helical filament 34 is during detecting vacuum degree to pressure change
Hair should rapidly, and detection time is short, and precision is higher, while enhancing the filament service life, extends the connection terminal service life with this.
Helical filament 34 shortens filament preheating time, and filament is powered starting faster, can less be polluted by pumping fluid,
And it is not easily susceptible to the influence of mechanical stress (such as situations such as vibration), it is not easy to be broken, improve the service performance of filament, avoid
Phenomena such as fracture of wire, occurs for filament, extends the service life of filament.
Helical filament 34 carries temperature-compensating, improves the utilization rate of the energy, so that signal stabilization, vacuum degree measurement precision
Height is suitble to remote transmission signal.
The supporting element 3 is cylinder-like structure comprising integrally formed support portion and interconnecting piece 33 and by helical filament
34 are accommodated in supporting element 3, offer opening on the interconnecting piece 33.
By opening up opening on supporting element 3, it may make the contact area of helical filament 34 and object to be detected to increase, mention
High helical filament 34 should rapidly to pressure change hair, and detection time is short, and precision is higher, while enhancing the filament service life.
Supporting element 3 is that cylinder-like structure can guarantee in vibration, the helical filament 34 vibration synchronous with the first supporting mechanism
It is dynamic, prevent helical filament 34 to be pulled off.
The support portion is equipped with the hold assembly 32 for fixing helical filament 34, the hold assembly 32 and the spiral shell
Filament 34 is revolved to connect.
1 outer surface of shell is equipped with screw thread 13, and the screw thread 13 is docked with object to be measured to generate vacuum tight
Sealing.
Screw thread 13 on shell 1 is docked with object to be measured to generate vacuum-tight seal, the vacuum-tight seal
Undertake the heat transfer from object to be measured to shell 1 so that the object to be measured be substantially positioned in shell 1 it is identical
Temperature guarantees that variable is essentially identical between the two, so that detection accuracy is higher, institute's geodesic structure is more acurrate.
The front end of the shell 1 is arranged in annular vibration component 12 on the shell 1, the annular vibration component 12.
It is closer that the vibration component may make that screw thread 13 and object to be measured on shell 1 dock, and sealing effect is more preferable,
Vibration component applies proper vibration dynamics to the connection terminal of the utility model simultaneously, can clear up helical filament 34, protects
Demonstrate,prove the precision of test.
The support terminals 2 are equipped with reinforcement feature 21, and the reinforcement feature 21 is rod-like structure, the reinforcement feature 21
It is vertical setting with the support terminals 2.
Support terminals 2 can closely be connect by reinforcement feature 21 with shell 1, it is ensured that in vibration, the helical filament
34 and the first supporting mechanism synchronous vibration, prevent helical filament 34 to be pulled off.
The utility model additionally provides a kind of vacuum pressure sensor, including is electrically connected control circuit 4 with connection terminal,
The control circuit 4 is equipped with spiral cover 5, and the spiral cover 5 is equipped with flank, and spiral cover 5 may make contact 51 not expose, and reduces body
Product, while installation limit point is equipped with inside spiral cover 5, prevent setup error；Certainly, it is most important that, it further include at least one sheet
The connection terminal of detection vacuum degree described in utility model.The configuration of above system is combined according to actual needs, be can be
Connection terminal is also possible to multiple connection terminal parallel forms
It can be seen from the above technical scheme that the support terminals 2 in the utility model are threaded through shell 1 and supporting element 3
On, it is ensured that in vibration, the helical filament 34 and the first supporting mechanism synchronous vibration prevent helical filament 34 to be pulled off；
Filament is helical structure, and vibration can be effectively prevented, and avoids being pulled off, while increasing contact area, is reduced
The length of whole device, has saved cost；
Helical filament 34 carries temperature-compensating, improves the utilization rate of the energy, so that signal stabilization, vacuum degree measurement precision
Height is suitble to remote transmission signal；34 thermal capacity of helical filament is small simultaneously, so that helical filament 34 is right during detecting vacuum degree
Pressure change hair should be rapid.
Embodiment described above is only preferred embodiments for fully illustrating the utility model, the utility model
Protection scope it is without being limited thereto.Those skilled in the art made equivalent substitute or change on the basis of the utility model
It changes, both is within the protection scope of the present invention.The protection scope of the utility model is subject to claims.
Claims (9)
1. a kind of connection terminal for detecting vacuum degree, which is characterized in that including the shell being mounted on object to be detected, with shell
The direction that body is installed on object to be measured keeps the first seal of the air-tightness on rear side of shell for front, and described first is close
It is equipped with support terminals on sealing, helical filament is connected in the support terminals, the front end of the support terminals runs through second
Sealing element, the second seal are equipped with the supporting element for being used to support the helical filament.
2. the connection terminal of detection vacuum degree as described in claim 1, which is characterized in that the helical filament includes first
Filament and the second filament, first filament and the second filament be double-spiral structure, first filament by third filament with
The connection of second filament.
3. the connection terminal of detection vacuum degree as claimed in claim 2, which is characterized in that first filament and second is carefully
Silk is connect with lead respectively, and the lead is connect with the support terminals, and the central axis of the conveyor screw is parallel with support terminals.
4. the connection terminal of detection vacuum degree as described in claim 1, which is characterized in that the helical filament is filament two
Secondary winding body composition, the secondary winding body of filament are made of winding body of 1 filament.
5. the connection terminal of the detection vacuum degree as described in claim 1-4 is any, which is characterized in that the supporting element is circle
Tubular structure comprising helical filament is simultaneously accommodated in supporting element by integrally formed support portion and interconnecting piece, the interconnecting piece
On offer opening.
6. the connection terminal of detection vacuum degree as claimed in claim 5, which is characterized in that the support portion is equipped with and is used for
The hold assembly of fixed helical filament, the hold assembly are connect with the helical filament.
7. the connection terminal of detection vacuum degree as described in claim 1, which is characterized in that the housing outer surface is equipped with
Screw thread, the screw thread are docked with object to be measured to generate vacuum-tight seal.
8. the connection terminal of detection vacuum degree as described in claim 1, which is characterized in that annular vibration portion on the shell
The front end of the shell is arranged in part, the annular vibration component.
9. the connection terminal of detection vacuum degree as described in claim 1, which is characterized in that the support terminals, which are equipped with, to be added
Gu component, the reinforcement feature is rod-like structure, and the reinforcement feature is vertical setting with the support terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721895940.7U CN208383383U (en) | 2017-12-29 | 2017-12-29 | Detect the connection terminal of vacuum degree |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721895940.7U CN208383383U (en) | 2017-12-29 | 2017-12-29 | Detect the connection terminal of vacuum degree |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208383383U true CN208383383U (en) | 2019-01-15 |
Family
ID=64979293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721895940.7U Expired - Fee Related CN208383383U (en) | 2017-12-29 | 2017-12-29 | Detect the connection terminal of vacuum degree |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208383383U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941416A (en) * | 2017-12-29 | 2018-04-20 | 李涛 | Detect the connection terminal of vacuum |
-
2017
- 2017-12-29 CN CN201721895940.7U patent/CN208383383U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941416A (en) * | 2017-12-29 | 2018-04-20 | 李涛 | Detect the connection terminal of vacuum |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190115 Termination date: 20201229 |
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| CF01 | Termination of patent right due to non-payment of annual fee |