CN202013843U - Pressure switch - Google Patents
Pressure switch Download PDFInfo
- Publication number
- CN202013843U CN202013843U CN201120108227XU CN201120108227U CN202013843U CN 202013843 U CN202013843 U CN 202013843U CN 201120108227X U CN201120108227X U CN 201120108227XU CN 201120108227 U CN201120108227 U CN 201120108227U CN 202013843 U CN202013843 U CN 202013843U
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- CN
- China
- Prior art keywords
- barrier film
- negative pressure
- housing
- pressure
- pressure switch
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Abstract
The utility model relates to the technical filed of switches, in particular to a pressure switch, which comprises a casing, a micro switch, an adjusting screw, a diaphragm, a piston piece and a main spring. The top of the piston piece abuts against the diaphragm. The main spring is arranged between the adjusting screw and the piston piece. A seal positive/negative pressure cavity is formed by the space reserved between the diaphragm and the bottom of the inner cavity of the casing. A negative pressure spring is arranged between the diaphragm and the bottom of the inner cavity of the casing. The pressure switch has only one seal cavity, thereby having relatively simple structure and reliable seal effect. Furthermore, the pressure switch can be used in positive and negative pressure occasions so that the application of products on the negative pressure occasions can be ensured while the structure of the products is simplified. Accordingly, the reliability of the products is improved, and lager negative pressure setting and larger pressure resistant capability are realized.
Description
Technical field:
The utility model relates to the switching technique field, refers in particular to a kind of pressure switch.
Background technology:
The mechanical compression switch is that pure mechanical deformation causes the sensitive switch action, and the same with current widely used pressure switch, service-strong spring and precise jiggle switch are as key element.When pressure increases, act on different sensed pressure components and parts (diaphragm, bellows, piston) and produce deformation, will move up, by mechanical structures such as railing springs, the final sensitive switch topmost that starts makes signal of telecommunication output.Be widely used in the automated system of measurement gas such as chemical industry, machinery, the hydrology, electric power, environmental protection, fluid pressure.Be applied to especially: the fluid pressure of surveying commercial water dispenser, coffee machine; Survey the hydraulic pressure of water heater or house gas boiler; The stopping state of explorer's usefulness or industrial air pump; The pressure sensitive of steam cleaner and control; Survey the working order of vacuum pump.Because easy to adjust installation is simple flexibly, can substitute most of occasion of using liquid-level switch.
Pressure switch applications market also has the application demand of negative pressure except the application demand of malleation at present; But the pressure switch of negative pressure induction at present seldom, also is complex structure even have, and product quality is unreliable or the applying pressure scope is very low.The tradition pressure switch includes housing, be arranged on the sensitive switch of case top, be threaded in set screw on the housing, be arranged on barrier film in the housing inner chamber, be positioned at piston sheet, the spring of set screw below, the bottom roof pressure of piston sheet is on barrier film, spring is arranged between set screw and the piston sheet, the bottom of sensitive switch is provided with switch by sincere, and the top of piston sheet is connected by sincere contacting with switch.But this pressure switch has positive seal cavity and two seal chambers of negative-pressure sealing cavity, and in order to realize negative-pressure sealing, vacuum cavity needs a cover diaphragm or a hold down gag, makes the product structure complexity; In addition, the negative-pressure sealing cavity will realize that sealing is reliable, and existing structure all is difficult to carry out, and it is little leakage or voltage endurance capability often to occur.
The utility model content:
The purpose of this utility model is exactly to provide a kind of pressure switch that can be applied to malleation occasion and negative pressure occasion, simplification product structure, improve product reliability at the deficiency of prior art existence.
To achieve these goals, the technical solution adopted in the utility model is: a kind of pressure switch, it includes housing, be arranged on the sensitive switch of case top, be threaded in set screw on the housing, be arranged on barrier film in the housing inner chamber, be positioned at piston sheet, the main spring of set screw below, the bottom roof pressure of piston sheet is on barrier film, main spring is arranged between set screw and the piston sheet, space between barrier film and the housing intracavity bottom form airtight just/vacuum cavity, be provided with the negative pressure spring between barrier film and the housing intracavity bottom.
Be provided with support chip between described negative pressure spring and the barrier film.
The middle part of described barrier film is to lower recess.
Described housing includes glue shell, Jiao Gai, and Jiao Gai is fastened and connected in glue shell bottom.
The periphery cramping of described barrier film is between glue shell and glue lid.
Described glue covers and offers annular slot, and the periphery of barrier film is fastened in the annular slot.
The utility model beneficial effect is: a kind of pressure switch that the utility model provides, it includes housing, sensitive switch, set screw, barrier film, is positioned at piston sheet, the main spring of set screw below, the bottom roof pressure of piston sheet is on barrier film, main spring is arranged between set screw and the piston sheet, space between barrier film and the housing intracavity bottom form airtight just/vacuum cavity, be provided with the negative pressure spring between barrier film and the housing intracavity bottom, when just/when the negative pressure spring not being installed in the vacuum cavity, the product induction be malleation; When just/when loading onto the negative pressure spring in the vacuum cavity, because the elastic force of negative pressure spring is greater than the elastic force of main spring, so in initial condition, barrier film is in upward position, when negative pressure reaches certain value, barrier film and piston sheet be stressed order about descending, compression negative pressure spring, thereby realize the conversion of sensitive switch, in sum, the utility model has only a seal chamber, and structure is simple relatively, sealing is reliable, both can be applied to the malleation occasion, also can be applied to the negative pressure occasion, and make product when guaranteeing application of sub-atmospheric pressure and simplify product structure, improve product reliability, can realize bigger negative pressure setting and bigger voltage endurance capability.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a decomposing schematic representation of the present utility model.
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described, see shown in Fig. 1～2, the utility model includes housing 1, be arranged on the sensitive switch 2 at housing 1 top, be threaded in the set screw 3 on the housing 1, be arranged on the barrier film 4 in housing 1 inner chamber, be positioned at the piston sheet 5 of set screw 3 belows, main spring 6, the bottom roof pressure of piston sheet 5 is on barrier film 4, main spring 6 is arranged between set screw 3 and the piston sheet 5, space between barrier film 4 and housing 1 intracavity bottom form airtight just/vacuum cavity 10, be provided with negative pressure spring 7 between barrier film 4 and housing 1 intracavity bottom.Be provided with support chip 8 between negative pressure spring 7 and the barrier film 4.
Housing 1 includes glue shell 11, glue lid 12, and glue lid 12 is fastened and connected in glue shell 11 bottoms.The periphery cramping of barrier film 4 offers annular slot 121 on the glue lid 12 between glue shell 11 and glue lid 12, the periphery of barrier film 4 is fastened in the annular slot 121, makes glue shell 11 and glue lid 12 barrier film 4 tightly can be clamped.The middle part of barrier film 4 is to lower recess.
When just/when negative pressure spring 7 not being installed in the vacuum cavity 10, the product induction be malleation; When just/when loading onto negative pressure spring 7 in the vacuum cavity 10, because the elastic force of negative pressure spring 7 is greater than the elastic force of main spring 6, so in initial condition, barrier film 4 is in upward position, when negative pressure reaches certain value, barrier film 4 and piston sheet 5 be stressed order about descending, compression negative pressure spring 7, thereby realize the conversion of sensitive switch 2, in sum, the utility model has only a seal chamber, and structure is simple relatively, sealing is reliable, both can be applied to the malleation occasion, also can be applied to the negative pressure occasion, and make product when guaranteeing application of sub-atmospheric pressure and simplify product structure, improve product reliability, can realize bigger negative pressure setting and bigger voltage endurance capability.
Certainly, the above only is a better embodiment of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.
Claims (6)
1. pressure switch, it includes housing (1), be arranged on the sensitive switch (2) at housing (1) top, be threaded in the set screw (3) on the housing (1), be arranged on the barrier film (4) in housing (1) inner chamber, be positioned at the piston sheet (5) of set screw (3) below, main spring (6), the bottom roof pressure of piston sheet (5) is on barrier film (4), main spring (6) is arranged between set screw (3) and the piston sheet (5), it is characterized in that: the space between described barrier film (4) and housing (1) intracavity bottom form airtight just/vacuum cavity (10), be provided with negative pressure spring (7) between barrier film (4) and housing (1) intracavity bottom, the elastic force of negative pressure spring (7) is greater than the elastic force of main spring (6).
2. a kind of pressure switch according to claim 1 is characterized in that: be provided with support chip (8) between described negative pressure spring (7) and the barrier film (4).
3. a kind of pressure switch according to claim 1 is characterized in that: the middle part of described barrier film (4) is to lower recess.
4. according to any described a kind of pressure switch of claim 1-3, it is characterized in that: described housing (1) includes glue shell (11), Jiao Gai (12), and Jiao Gai (12) is fastened and connected in glue shell (11) bottom.
5. a kind of pressure switch according to claim 4 is characterized in that: the periphery cramping of described barrier film (4) is between glue shell (11) and Jiao Gai (12).
6. a kind of pressure switch according to claim 5 is characterized in that: offer annular slot (121) on the described Jiao Gai (12), the periphery of barrier film (4) is fastened in the annular slot (121).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120108227XU CN202013843U (en) | 2011-04-14 | 2011-04-14 | Pressure switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120108227XU CN202013843U (en) | 2011-04-14 | 2011-04-14 | Pressure switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202013843U true CN202013843U (en) | 2011-10-19 |
Family
ID=44784458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120108227XU Expired - Fee Related CN202013843U (en) | 2011-04-14 | 2011-04-14 | Pressure switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202013843U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158507A (en) * | 2016-08-25 | 2016-11-23 | 浙江沁园水处理科技有限公司 | Voltage regulating type high voltage switchs and uses the water purifier of this high-voltage switch gear |
-
2011
- 2011-04-14 CN CN201120108227XU patent/CN202013843U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158507A (en) * | 2016-08-25 | 2016-11-23 | 浙江沁园水处理科技有限公司 | Voltage regulating type high voltage switchs and uses the water purifier of this high-voltage switch gear |
| CN109643621A (en) * | 2016-08-25 | 2019-04-16 | 浙江沁园水处理科技有限公司 | Voltage regulating type high voltage switch and the water purifier using the high-voltage switch gear |
| CN109643621B (en) * | 2016-08-25 | 2020-04-07 | 浙江沁园水处理科技有限公司 | Pressure regulating type high-voltage switch and water purifier using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20140414 |