CN2242077Y - Pneumatic switch - Google Patents
Pneumatic switch Download PDFInfo
- Publication number
- CN2242077Y CN2242077Y CN 95201748 CN95201748U CN2242077Y CN 2242077 Y CN2242077 Y CN 2242077Y CN 95201748 CN95201748 CN 95201748 CN 95201748 U CN95201748 U CN 95201748U CN 2242077 Y CN2242077 Y CN 2242077Y
- Authority
- CN
- China
- Prior art keywords
- air chamber
- electrode
- baroswitch
- barrier film
- dish
- 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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- Push-Button Switches (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
The utility model relates to a pneumatic switch, relating to a switch operated by the change of fluid pressure. An air chamber cover covers on a switch base, and an air chamber is formed. A diaphragm in the air chamber cover divides the air chamber into two parts, and the two parts are uniformly provided with a through hole communicated with an external world. A center electrode and at least two electrode supports are embedded on the switch base, a spring is arranged on the center electrode, testing electrodes with different heights are arranged in the electrode support, a dishing electric wafer in the diaphragm is tightly pasted on the membrane under the action of the spring, and the outer circle surface of the dishing electric wafer keeps distance with testing electrodes. The utility model can detect different pressure values.
Description
A kind of baroswitch relates to the switch by the change in fluid pressure operation.
At present, the baroswitch majority of domestic dust catcher employing is the single contact output form.As a kind of " differential pressure switch " of No. 91222198.4 bulletins of Chinese patent application, the scheme that it adopts spacing push rod directly to contact with microswitch.And be positioned on the housing of malleation chamber one side and fix Packed microswitch, the adjustment end of pressure spring is equipped with capsul.This differential pressure switch can only detect a force value, generally is used for detecting the air flue stopping state, makes alarm detection and uses.Therefore function ratio is more single, and the switch overall volume is all bigger, and whole machine installation is also inconvenient.
The purpose of this utility model provides a kind of small-sized multiconductor baroswitch, and it can detect different force value.
The purpose of utility model is achieved in that the air chamber cover covers on the switch base, and forms air chamber, and the barrier film in the air chamber cover is divided into two parts with air chamber, and described two parts all have through hole to communicate with the external world.Be embedded with central electrode and at least two pieces of electrode tip holders on the switch base, spring is housed on the central electrode, highly different detecting electrodes is housed in the electrode tip holder.Having a dish-shaped electric contact point to be close to the cylindrical that makes dish-shaped electric contact point on the barrier film in the barrier film under the effect of spring keeps at a distance along face and detecting electrode.During work, recessed distortion takes place in air pressure official post air chamber barrier film, moves to electrode direction thereby drive dish-shaped electric contact point.Along with pressure reduction increases, dish-shaped electric contact point at first with detecting electrode in highly higher one contact; Dish-shaped subsequently electric contact point is done the slightly-inclined displacement, contacts successively with all the other detecting electrodes.When pressure reduction reduced gradually, dish-shaped electric contact point was made backward with detecting electrode and is separated one by one.Adjust the spacing between detecting electrode and the dish-shaped electric contact point, just the pressure signal of required detection can be changed into signal of telecommunication output.
Therefore the utility model can detect different force value owing to adopt central electrode to add a structure of differing heights detecting electrode.Can be used for doing in the dust catcher suction and change detection, cooperate electronic control circuit, make dust catcher except that having common warning function, also have the automatic regulatory function of inhalation power.And the utility model also to have a volume little, can be directly installed on the characteristics on the control circuit board.
The concrete structure of utility model provides by following drawings and Examples.
The baroswitch structural representation that accompanying drawing the utility model proposes for foundation.
Below in conjunction with accompanying drawing the baroswitch that foundation the utility model proposes is further described.
As shown in drawings, air chamber cover (1) covers on the switch base (9), thereby constitutes air chamber by air chamber cover and switch base.At least one air chamber cover is arranged on switch base, and form air chamber separately.Then form an air chamber as an air chamber cover, two air chamber covers then form two air chambers.Barrier film (11) in the air chamber cover is divided into two parts with air chamber, and described two parts all have through hole (2) to communicate with the external world.One of described through hole is opened on air chamber cover (1), and another is opened on switch base (9).Diaphragm case is on diaphragm seal ring seat (10), and the air chamber cover then is pressed on barrier film on the diaphragm seal ring seat, thereby plays the fixedly effect of barrier film and sealed air chamber.Be embedded with central electrode (7) and at least two pieces of electrode tip holders (8) on the switch base.Spring (5) is housed on the central electrode, and this spring is preferably pagoda shape.Highly different detecting electrode (6) is housed, to detect the different pressures value in the electrode tip holder.If a plurality of air chambers are arranged, a central electrode and at least two electrode tip holders are arranged in each air chamber then.For adapting to different operating pressure, the height of detecting electrode preferably can be regulated, and detecting electrode can screw in the electrode tip holder for this reason.There is a dish-shaped electric contact point (12) under the effect of spring, to be close on the barrier film in the barrier film, the cylindrical of dish-shaped electric contact point is kept at a distance along face and detecting electrode (6).When adopting pagoda shape spring, the big end of spring withstands on the dish-shaped electric contact point.In order to make dish-shaped contact in moving process, keep relative stablizing with the barrier film inner surface, on barrier film, be processed with internal projection (4), have through hole on the dish-shaped contact.The dish contact is enclosed within on the internal projection by through hole.And in order to make the barrier film uniform-compression, the position facing to air chamber cover through hole on barrier film is processed with outer lug (3).Detecting electrode can be three, also can be two, thereby can detect three to two different force value.Through hole on the switch base (2) is preferably processed on central electrode (7), that is adopts the hollow tubular central electrode.
Claims (7)
1, a kind of baroswitch, its air chamber cover covers on the switch base and forms air chamber, barrier film in the air chamber is divided into two parts with air chamber, described two parts all have through hole to communicate with the external world, it is characterized in that being embedded with on the switch base central electrode and at least two pieces of electrode tip holders, spring is housed on the central electrode, highly different detecting electrodes is housed in the electrode tip holder; There is a dish-shaped electric contact point under the effect of spring, to be close on the barrier film in the barrier film, the cylindrical of dish-shaped electric contact point is kept at a distance along face and detecting electrode.
2, baroswitch according to claim 1 is characterized in that having two air chamber covers to cover on the switch base and forms separately air chamber, and one piece of central electrode and at least two pieces of electrode tip holders are arranged in each air chamber.
3, baroswitch as claimed in claim 1 or 2 is characterized in that central electrode is a hollow tube.
4, baroswitch as claimed in claim 1 or 2 is characterized in that detecting electrode has three.
5, baroswitch as claimed in claim 1 or 2, what it is characterized in that spring is shaped as pagoda shape.
6, baroswitch as claimed in claim 1 or 2 is characterized in that there is outer lug the position facing to air chamber cover through hole on the barrier film.
7, baroswitch as claimed in claim 1 or 2 is characterized in that internal projection is arranged on the barrier film, and dish-shaped contact has through hole, and dish-shaped contact is enclosed within on the internal projection by through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95201748 CN2242077Y (en) | 1995-01-19 | 1995-01-19 | Pneumatic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95201748 CN2242077Y (en) | 1995-01-19 | 1995-01-19 | Pneumatic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2242077Y true CN2242077Y (en) | 1996-12-11 |
Family
ID=33855099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95201748 Expired - Fee Related CN2242077Y (en) | 1995-01-19 | 1995-01-19 | Pneumatic switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2242077Y (en) |
-
1995
- 1995-01-19 CN CN 95201748 patent/CN2242077Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |