CN204944729U - A kind of pressure test device - Google Patents
A kind of pressure test device Download PDFInfo
- Publication number
- CN204944729U CN204944729U CN201520719929.XU CN201520719929U CN204944729U CN 204944729 U CN204944729 U CN 204944729U CN 201520719929 U CN201520719929 U CN 201520719929U CN 204944729 U CN204944729 U CN 204944729U
- Authority
- CN
- China
- Prior art keywords
- closed area
- bellows
- test device
- pressure test
- annular seal
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a kind of pressure test device, comprise housing, described housing and case form closed area, described housing and receiving tube form lower closed area, are provided with differential transformer coil in described upper closed area, and described differential transformer coil inside is provided with annular seal space, iron core is provided with in described annular seal space, be provided with bellows in described lower closed area, described bellows center is connected with iron core by inserted link, is provided with screen pack between described bellows and receiving tube.The utility model structure is simple, cheap for manufacturing cost, stable performance, and adaptive capacity to environment is strong, and it is fast that air pressure detects response, and precision is high.
Description
Technical field
The utility model relates to a kind of pick-up unit, particularly relates to a kind of pressure test device.
Background technology
Pressure transducer plays very important effect in pressure survey, control engineering.According to different principle of work, pressure transducer can be divided into the different structures such as resistance-strain type, inductance type, condenser type, optical fiber type.Along with material science and technology, micro-electro-mechanical systems are unified the development of ultraprecise Machining Technology, various types of microelectromechanical systems (microelectricalmechanicalsyste, MEMS) pressure transducer is used widely.But along with the continuous extension of survey control technology, under the harsh environments conditions such as boat diesel engine cabin, gas turbine cabin, application circumstances is had higher requirement to performances such as tonometric precision and sensitivity.
Utility model content
Technical problem to be solved in the utility model is to provide that a kind of structure is simple, cheap for manufacturing cost, stable performance, and adaptive capacity to environment is strong, and it is fast that air pressure detects response, the pressure test device that precision is high.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of pressure test device, comprise housing, described housing and case form closed area, described housing and receiving tube form lower closed area, differential transformer coil is provided with in described upper closed area, described differential transformer coil inside is provided with annular seal space, iron core is provided with in described annular seal space, bellows is provided with in described lower closed area, described bellows center is connected with iron core by inserted link, is provided with screen pack between described bellows and receiving tube.
Described housing and case form closed area for the protection of internal components; described differential transformer coil inside is provided with annular seal space; iron core is provided with in described annular seal space; balancing fields is formed for differential transformer coil and iron core; described bellows is for responding to ambient pressure; and air pressure change is passed to iron core; differential transformer coil and core field is caused to change; produce electric signal; described receiving tube is used for the input of ambient pressure; described screen pack, for inputting the filtration of particulate matter in gas, prevents particulate matter from entering device, causes device failure.
On the basis of technique scheme, the utility model can also do following improvement.
Further, be provided with sealed tube between described differential transformer coil and annular seal space, described sealed tube is used for the sealing of annular seal space, prevents outer signals from disturbing, and magnetic leakage phenomenon occurs, and does not limit iron core simultaneously and is free to slide in annular seal space.
Further, described case is aluminum alloy material, and described aluminum alloy material hardness is strong, quality is light, with low cost, effectively can improve the overload of device, and the adaptability of varying environment, effectively can prevent outside electromagnetic interference simultaneously.
Further, bellows and upper closed area are vacuum seal district, and described vacuum seal district is provided with the resistance being beneficial to and reducing internal components and slide, thus improves the sensitivity of pressure test device, and response speed.
Further, described bellows is metallic elastic sensitive element, described metallic elastic sensitive element produces deformation under extraneous gas pressure, promotes iron core displacement, produces changes of magnetic field, realize air pressure change and convert electric signal to, by realizing the detection of air pressure to the detection of electric signal, bellows is metallic elastic sensitive element simultaneously, has stronger holding capacity, under the prerequisite ensureing sensitivity, effectively can improve the detection range of pressure test device.
The beneficial effects of the utility model are: structure is simple, cheap for manufacturing cost, stable performance, and adaptive capacity to environment is strong, and it is fast that air pressure detects response, and precision is high.
Accompanying drawing explanation
Fig. 1 is a kind of pressure test device structural representation of the utility model;
In accompanying drawing, the list of parts representated by each label is as follows: 1, case, and 2, annular seal space, 3, differential transformer coil, 4, sealed tube, 5, iron core, 6, inserted link, 7, housing, 8, upper closed area, 9, bellows, 10, receiving tube, 11, bellows center, 12, screen pack.
Embodiment
Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
As shown in Figure 1, a kind of pressure test device, comprise housing 7, described housing 7 forms closed area 8 with case 1, described housing 7 and receiving tube 10 form lower closed area 13, differential transformer coil 3 is provided with in described upper closed area 8, described differential transformer coil 3 inside is provided with annular seal space 2, iron core 5 is provided with in described annular seal space 2, bellows 9 is provided with in described lower closed area 13, described bellows center 11 is connected with iron core 5 by inserted link 6, is provided with screen pack 12 between described bellows 9 and receiving tube 10.
Described housing 7 forms closed area 8 for the protection of internal components with case 1, described differential transformer coil 3 inside is provided with annular seal space 2, iron core 5 is provided with in described annular seal space 2, balancing fields is formed for differential transformer coil 3 and iron core 5, described bellows 9 is for responding to ambient pressure, and air pressure change is passed to iron core 5, the change in displacement of described iron core 5, cause differential transformer coil 3 and iron core 5 changes of magnetic field, produce electric signal, described receiving tube 10 is for the input of ambient pressure, described screen pack 12 is for inputting the filtration of particulate matter in gas, prevent particulate matter from entering device, cause device failure.
Be provided with sealed tube 4 between described differential transformer coil 3 and annular seal space 2, described sealed tube 4, for the sealing of annular seal space 2, prevents outer signals from disturbing, and magnetic leakage phenomenon occurs, and does not limit iron core 5 simultaneously and is free to slide in annular seal space 2.Described case 1 is aluminum alloy material, and described aluminum alloy material hardness is strong, quality is light, with low cost, effectively can improve the overload of device, and the adaptability of varying environment, effectively can prevent outside electromagnetic interference simultaneously.Bellows 9 is vacuum seal district with upper closed area 8, and described vacuum seal district is provided with the resistance being beneficial to and reducing internal components and slide, thus improves the sensitivity of pressure test device, and response speed.Described bellows 9 is metallic elastic sensitive element, described metallic elastic sensitive element produces deformation under extraneous gas pressure, promote iron core 5 displacement, produce changes of magnetic field, realize air pressure change and convert electric signal to, by realizing the detection of air pressure to the detection of electric signal, bellows 9 is metallic elastic sensitive element simultaneously, there is stronger holding capacity, under the prerequisite ensureing sensitivity, effectively can improve the detection range of pressure test device.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. a pressure test device, it is characterized in that, comprise housing, described housing and case form closed area, and described housing and receiving tube form lower closed area, differential transformer coil is provided with in described upper closed area, described differential transformer coil inside is provided with annular seal space, is provided with iron core in described annular seal space, is provided with bellows in described lower closed area, described bellows center is connected with iron core by inserted link, is provided with screen pack between described bellows and receiving tube.
2. a kind of pressure test device according to claim 1, is characterized in that, be provided with sealed tube between described differential transformer coil and annular seal space.
3. a kind of pressure test device according to claim 1, it is characterized in that, described case is aluminum alloy material.
4. a kind of pressure test device according to claim 1, it is characterized in that, described bellows and upper closed area are vacuum seal district.
5. a kind of pressure test device according to claim 1, it is characterized in that, described bellows is metallic elastic sensitive element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520719929.XU CN204944729U (en) | 2015-09-17 | 2015-09-17 | A kind of pressure test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520719929.XU CN204944729U (en) | 2015-09-17 | 2015-09-17 | A kind of pressure test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204944729U true CN204944729U (en) | 2016-01-06 |
Family
ID=55012145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520719929.XU Expired - Fee Related CN204944729U (en) | 2015-09-17 | 2015-09-17 | A kind of pressure test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204944729U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829715A (en) * | 2019-04-22 | 2020-10-27 | 王久钰 | Pressure sensor based on electric bridge, pressure measuring system and pressure measuring method |
-
2015
- 2015-09-17 CN CN201520719929.XU patent/CN204944729U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829715A (en) * | 2019-04-22 | 2020-10-27 | 王久钰 | Pressure sensor based on electric bridge, pressure measuring system and pressure measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 Termination date: 20160917 |