CN200947417Y - Pressure switch - Google Patents
Pressure switch Download PDFInfo
- Publication number
- CN200947417Y CN200947417Y CN 200620064099 CN200620064099U CN200947417Y CN 200947417 Y CN200947417 Y CN 200947417Y CN 200620064099 CN200620064099 CN 200620064099 CN 200620064099 U CN200620064099 U CN 200620064099U CN 200947417 Y CN200947417 Y CN 200947417Y
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- Prior art keywords
- shell fragment
- pressure
- base
- barrier film
- set screw
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- Expired - Lifetime
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Abstract
The utility model relates to a pressure switch technology, in particular to a pressure switch with positive and negative pressure chamber, including a face cover and a base linked together. The space between the face cover and the base is divided into the positive and the negative pressure chamber by the separating membrane. A clips agency affected by the separating membrane bracket playing the role of driving fast switching of the electrical contact point is fixed in the negative pressure chamber of the middle base. The both terminal of the box-shaped main clips are provided with two inward clips tongues. The tongue terminals of the two clips tongues of the main clips are provided with a dynamic contact point. The dynamic contact point is positioned between the normally open contact point of the switch and the normally close contact point. The two clips tongues of the main clips are interlocking with the both terminal of the driving tongue. In the medium part of the face cover, a surcharging adjustment screw with the springs is arranged. The corresponding base is provided with a pressure opening adjustment screw with the springs. The pressure switch provided by the utility model is easy to use and assemble; the opening and closing pressure can be adjusted within the large pressure scope, so as to achieve very low pressure and good stability.
Description
Technical field
The utility model relates to the switching technique field, is specifically related to a kind of pressure switch on high-precision pressure control field such as the boiler etc. of being applied to air chamber.
Background technology
Pressure switch is to come the element of the break-make conversion of control switch electrical contact according to the pressure that is detected.Usually have the pressure switch of the malleation measured, negative pressure and the differential pressure of air chamber, comprise cover and base, be provided with barrier film and the microswitch structure that is subjected to the barrier film effect between cover and the base.Described pressure switch by barrier film between cover and the base every being divided into plemum and negative pressure chamber, cover is provided with plemum, negative pressure chamber's interface that can be connected with the medium that is detected with base.When the pressure change of the medium that leads to the positive negative pressure chamber of pressure switch, the barrier film between the positive and negative pressure chamber can produce displacement, switches to play and detects and the effect of controlled pressure thereby drive the sensitive switch contact.
Fig. 1 has provided a kind of internal structure schematic cross-section of common pressure switch, when the switch ambient pressure increases, cause that the plemum internal pressure increases, when increasing to a certain degree, promote 3 of diaphragm supports and move downward, pressure passes on the main body shell fragment 5, causes that driving shell fragment 52 deformation rotates, excite the moving contact on the shell fragment tongue piece 51 to switch, realize the quick handoff functionality of switch.
But the pressure switch of this structure, the point of force application that its diaphragm support seat 3 is passed to main body shell fragment 5 is on the main body shell fragment, needs big opening pressure to work comparatively speaking.The opening pressure adjustable extent of this pressure switch is also narrow simultaneously, it is regulated opening pressure and has transferred main body shell fragment supporting slice 53 by opening pressure set screw 200, drive the main body shell fragment and produce displacement, cause diaphragm support sheet change in displacement, thereby cause that opening pressure changes, make opening pressure adjustable, the effect of fine setting is only played in this adjusting.And, to open set screw and directly transferred main body shell fragment supporting slice, main body shell fragment force transmission is given the diaphragm support seat, main body shell fragment supporting slice resilience poor effect, repeatedly adjusting can cause that also reliability reduces.It also is the displacement of directly adjusting the shell fragment tongue pieces by closing presure set screw 300 that same this this pressure switch is closed the pressure adjustment, and its stability and resilience be also relatively poor.
The utility model content
Technical problem to be solved in the utility model provides a kind of good stability, can realize the high-precision pressure switch of low opening pressure, broad adjustable pressure scope.
The utility model is achieved through the following technical solutions:
Design a kind of pressure switch, the cover and the base that comprise mutual snapping, be provided with barrier film and barrier film supporting seat between cover and the base, barrier film and barrier film supporting seat the space between cover and the base every being divided into positive and negative two air chambers, cover is provided with the interface that is connected with plemum, and base is provided with the interface that is connected with negative pressure chamber.Be fixed with the support column that is subjected to the barrier film supporting seat at the base middle part and do in order to drive the shell fragment mechanism that electrical contact switches, shell fragment mechanism includes the main body shell fragment and drives shell fragment.The inward at both ends of shaped as frame main body shell fragment is provided with two elastic tongue pieces, the tongue end of main body shell fragment head end elastic tongue piece is provided with moving contact, described moving contact is between switch normally opened contact and normally-closed contact, the two ends that the tongue end of the tongue end of main body shell fragment head end elastic tongue piece and main body shell fragment tail end elastic tongue piece and sheet drive shell fragment are interlockingly connected, described cover middle part is provided with the precompressed set screw, the diaphragm element application point acts on the tongue end of tail end elastic tongue piece, and corresponding base middle part is provided with the opening pressure set screw in diaphragm element application point place relatively.
Be respectively equipped with precompressed regulating spring and opening pressure regulating spring on precompressed set screw and the opening pressure set screw, the precompressed regulating spring acts on the barrier film supporting seat, barrier film supporting seat center acts on the tongue end of tail end elastic tongue piece to the barrier film support column of lower convexity, the active pointer upper end of passing the set through hole of tongue end of main body shell fragment tail end elastic tongue piece is arranged in the barrier film support column, and the lower end of active pointer is placed in the opening pressure regulating spring and contacts with the opening pressure set screw.
This pressure switch cover circle spacing miter angle is furnished with main mounting hole site, and main mounting hole site both sides are provided with auxiliary erection column, and the mounting bracket of pressure switch is fixedlyed connected with the mounting hole site on the cover by fixed screw.
The utility model compared with prior art has following remarkable advantage:
Pressure switch precision height provided by the utility model, good stability can be realized very low operating pressure and broad adjustable pressure scope.The mounting hole site that covers setting at switching surface cooperates mounting bracket can realize the installation that freely commutates of pressure switch assembling; The precompressed set screw of being furnished with spring of setting up matches with the driving shell fragment can realize broad pressure limit; Can realize that by adjusting the opening pressure set screw and closing the dynamic pressure set screw opening and closing pressure changes within the specific limits.Utilize the opening pressure set screw to transfer the opening pressure regulating spring, and pass to the diaphragm support seat by main body shell fragment tongue piece, the recoil of spring effect is splendid, the reliability height.Precompressed set screw of the present utility model, precompressed regulating spring and opening pressure set screw combination collocation can reach very low opening pressure, broad pressure limit.The pre-compressed spring of this structure and opening pressure regulating spring can be replaced arbitrarily, thereby realize different pressures scope demand.
Description of drawings
Fig. 1 is the internal structure schematic cross-section of the pressure switch of prior art;
Fig. 2 is the utility model schematic appearance; Fig. 3 is the local enlarged diagram of A portion among Fig. 2;
Fig. 4 is that schematic diagram is looked on the right side of Fig. 2; Fig. 5 is the local enlarged diagram of B portion among Fig. 4;
Fig. 6 is the schematic top plan view of Fig. 2; Fig. 7 is the P1-P1 cutaway view of Fig. 6;
Fig. 8 is the P2-P2 cutaway view of Fig. 6; Fig. 9 is the utility model internal structure schematic cross-section;
Figure 10 is the utility model normally open schematic diagram; Figure 11 is the normal off status schematic diagram of the utility model;
Figure 12 is the utility model main body shell fragment schematic diagram; Figure 13 is that the utility model drives the shell fragment schematic diagram;
Figure 14 is a shell fragment structural scheme of mechanism of the present utility model; Figure 15 is the end view of Figure 14;
Figure 16 is a parts decomposing schematic representation of the present utility model.
Embodiment
The utility model is described in further detail by embodiment below in conjunction with accompanying drawing.
Shown in Fig. 2-16, a kind of pressure switch, comprise the cover 2 and the base 6 that snap together mutually, be provided with barrier film supporting seat 3 and barrier film 4 between cover and the base, barrier film supporting seat, barrier film the space between cover and the bottom every being divided into two air chambers of plemum and negative pressure chamber.Cover is provided with the plemum interface 7 that is connected with plemum, and base is provided with the negative pressure chamber's interface 8 that is connected with negative pressure chamber.
The shell fragment mechanism that switched in order to the driving electrical contact by barrier film supporting seat work is installed in the negative pressure chamber in the base, and shell fragment mechanism comprises main body shell fragment 5 and drives shell fragment 52.The main body shell fragment is a shaped as frame, and the inward at both ends of main body shell fragment is provided with the elastic tongue piece of two activities, and the tongue end of main body shell fragment head end elastic tongue piece 50 is provided with moving contact 21, and moving contact is between switch normally opened contact 20 and normally-closed contact 22.
The tongue end of main body shell fragment head end elastic tongue piece 50 and the tongue end of tail end elastic tongue piece 51 all are arranged to recess shape, and notched convex is processed at the two ends of the driving shell fragment 52 of sheet, and driving shell fragment like this can snap together by two elastic tongue piece tongue ends of its two ends and main body shell fragment.Movable fastening structure is convenient to change the driving shell fragment.
Diaphragm element comprises barrier film and barrier film supporting seat, barrier film supporting seat center acts on the tongue end of tail end elastic tongue piece 51 to the barrier film support column 31 of lower convexity, the tongue end center position of tail end elastic tongue piece is provided with through hole, be inserted in the barrier film support column after passing described through hole the upper end of active pointer 32, and the active pointer lower end is placed in the opening pressure regulating spring 201 and contacts with the opening pressure set screw.By active pointer barrier film support column, tail end elastic tongue piece and opening pressure regulating spring are linked together, make the barrier film support column more stable, improve the switch precision for the application point of tail end elastic tongue piece.
When barrier film supporting seat pressurized produces displacement, the barrier film support column acts on the tail end elastic tongue piece of main body shell fragment, make the tail end elastic tongue piece produce displacement downwards, drive and drive the shell fragment torsional deflection, thereby the moving contact on the main body shell fragment head end elastic tongue piece is switched between normally opened contact 20 and normally-closed contact 22.The pressure switch of this structure drives the inboard that shell fragment is positioned at moving contact, and the moment that switch the contact is reduced relatively, realizes lower opening pressure.
Described cover middle part is provided with precompressed set screw 100, and corresponding base middle part is provided with opening pressure set screw 200, is respectively equipped with precompressed regulating spring 101 and opening pressure regulating spring 201 on precompressed set screw and the opening pressure set screw.When regulating the precompressed set screw, the stressed action of pre-compressed spring, the barrier film support column that promotes barrier film supporting seat and center thereof produces displacement downwards, drives main body shell fragment tail end elastic tongue piece and drives shell fragment to produce certain deformation, thereby adjust the pressure measurement scope of pressure switch.Adjustable opening pressure regulating spring when adjusting the opening pressure set screw, the opening pressure regulating spring acts on the main body shell fragment tail end elastic tongue piece can cause diaphragm support post change in displacement, thereby makes opening pressure adjustable.Simultaneously, transferred the combination collocation of precompressed regulating spring and opening pressure regulating spring, realized in a big way control opening pressure and broad pressure limit by the precompressed set screw.Precompressed is adjusted on screw and the opening pressure adjustment screw and is provided with spring in this pressure switch construction, can improve the reliability that opening pressure is adjusted.Pre-compressed spring and opening pressure regulating spring can be replaced arbitrarily, realize the demand of different pressures scope.
This pressure switch not only has the opening pressure set screw, also is provided with closing presure set screw 300 under normally-closed contact, can realize that closing presure in internal pressure fluctuation among a small circle, satisfies different differential pressure rate range demands.
Pressure switch of the present utility model is easy to assembly, can install and use by any direction.This pressure switch cover circle spacing miter angle is furnished with main mounting hole site 10, main mounting hole site both sides are provided with auxiliary erection column 11, two ends are provided with connecting hole on the sheet mounting bracket 1 of pressure switch configuration, wear the connecting hole of mounting bracket and the main mounting hole site of cover links together mounting bracket and pressure switch by fixed screw 12, the auxiliary erection column of cover butts up against the location hole that is provided with on the mounting bracket, makes both connections more firm.During actual installation, pressure switch is assemblied on the utensil that is detected by its mounting bracket, because the mounting hole site on the pressure switch cover is evenly to arrange the setting pressure switch that can arbitrarily commutate like this, flexible operation.
Five metals terminal 9 in the present embodiment on the pressure switch plastic cement base is to be fixed on the plastic cement base by impact style, and the five metals terminal is connected by lead with normally opened contact, normally-closed contact.Five metals terminal 9 is provided with the back-off position of being convenient to the base secure fit 91, small protruding position 92 can also be set to realize and the sealing of base screens and fastening on the five metals terminal.For enhanced leaktightness, carry out sealant pouring and sealing at five metals terminal and plastic cement base contact-making surface place 93.
Pressure switch provided by the utility model mainly is used in high-precision pressure control occasion such as combustion gas, coal gas is on main fuel boiler, steam-boiler, kettle and the boiler, plays accurate control and the monitoring and protecting effect, guarantees security appliance.
When installing and using, plemum interface 7, negative pressure chamber's interface 8 are communicated with corresponding pressure transmission position usually.During the normal safe operation of electrical equipment utensil, pressure switch is in normally off, moving contact 21 contacts with normally-closed contact, when the plemum internal pressure increases, when increasing to a certain degree, promoting the diaphragm support post moves downward, the tail end elastic tongue piece that drives the main body shell fragment moves downward, cause to drive shell fragment deformation twisting, the drive moving contact leaves normally-closed contact 22 and contacts with normally opened contact 20, realizes the quick handoff functionality of switch, make switch switch to normally open from normally off, thereby cut off electrical equipment utensil circuit, guarantee electrical equipment utensil safety, play the control apparatus effect.And when negative pressure chamber's internal pressure reduces, then the plemum internal pressure is greater than negative pressure chamber's pressure, pressure in the plemum can promote the film support column and move downward, cause at last and drive shell fragment deformation twisting, excite electric contact to switch, make switch switch to normally open equally, further guarantee the safety of electrical equipment utensil, play the safety detection effect from normally off.
Pressure switch provided by the utility model, easy to install, unlatching, closing presure can be adjusted, and have broad pressure limit and very low opening pressure, and good stability.The regulating spring of the pre-compressed spring of the utility model pressure switch and unlatching, closing presure can be replaced arbitrarily, can realize the demand of different pressures scope.
Claims (6)
1, a kind of pressure switch, the cover (2) and the base (6) that comprise mutual snapping, the shell fragment mechanism that is provided with diaphragm element between cover and the base and is subjected to the driving electrical contact switching that is arranged on the base middle part of diaphragm element effect, shell fragment mechanism includes main body shell fragment (5) and drives shell fragment (52), the plemum interface (7) and the negative pressure chamber's interface (8) that are provided with on cover and the base are connected with plemum that separates by diaphragm element and negative pressure chamber respectively
It is characterized in that: the inward at both ends of described shaped as frame main body shell fragment is provided with two elastic tongue pieces, the tongue end of main body shell fragment head end elastic tongue piece (50) is provided with moving contact (21), described moving contact is positioned between switch normally opened contact (20) and the normally-closed contact (22), the two ends that the tongue end of main body shell fragment head end elastic tongue piece and the tongue end of tail end elastic tongue piece and sheet drive shell fragment (52) are interlockingly connected, described cover middle part is provided with precompressed set screw (100), the diaphragm element application point acts on the tongue end of tail end elastic tongue piece (51), and corresponding base middle part is provided with opening pressure set screw (200) in diaphragm element application point place relatively.
2, pressure switch according to claim 1, it is characterized in that: described diaphragm element comprises barrier film and barrier film supporting seat, barrier film supporting seat center acts on the tongue end of tail end elastic tongue piece (51) to the barrier film support column (31) of lower convexity, active pointer (32) upper end of passing the set through hole of tongue end of main body shell fragment tail end elastic tongue piece is arranged in the barrier film support column, and the lower end of active pointer contacts with the unlatching set screw.
3, pressure switch according to claim 2, it is characterized in that: be respectively equipped with precompressed regulating spring (101) and opening pressure regulating spring (201) on described precompressed set screw and the opening pressure set screw, the precompressed regulating spring acts on the barrier film supporting seat, and the described active pointer other end is placed in the opening pressure regulating spring (201) and contacts with the opening pressure set screw.
4, pressure switch according to claim 3 is characterized in that: described normally-closed contact has closing presure set screw (300).
5, pressure switch according to claim 4, it is characterized in that: also dispose sheet mounting bracket (1) on the described cover with connecting hole, cover circle spacing miter angle is furnished with main mounting hole site (10), main mounting hole site both sides are provided with auxiliary erection column (11), and mounting bracket is fixedlyed connected with cover by fixed screw.
6, pressure switch according to claim 5, it is characterized in that: be fixed on the plastic cement base by impact style with the terminal (9) that normally opened contact, normally-closed contact are connected by lead, also be provided with on the described terminal and be convenient to and the friction tight back-off of base position (91).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620064099 CN200947417Y (en) | 2006-09-07 | 2006-09-07 | Pressure switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620064099 CN200947417Y (en) | 2006-09-07 | 2006-09-07 | Pressure switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200947417Y true CN200947417Y (en) | 2007-09-12 |
Family
ID=38734482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620064099 Expired - Lifetime CN200947417Y (en) | 2006-09-07 | 2006-09-07 | Pressure switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200947417Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465216A (en) * | 2014-12-10 | 2015-03-25 | 郭启强 | Pressure travel switch working in airtight mode |
| CN106248291A (en) * | 2015-06-09 | 2016-12-21 | Smc株式会社 | Pressure switch |
-
2006
- 2006-09-07 CN CN 200620064099 patent/CN200947417Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465216A (en) * | 2014-12-10 | 2015-03-25 | 郭启强 | Pressure travel switch working in airtight mode |
| CN104465216B (en) * | 2014-12-10 | 2018-08-10 | 郭启强 | A kind of pressure stroke switch of closed work |
| CN106248291A (en) * | 2015-06-09 | 2016-12-21 | Smc株式会社 | Pressure switch |
| CN106248291B (en) * | 2015-06-09 | 2020-03-24 | Smc株式会社 | Pressure switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHUANGLE ELECTRONIC INDUSTRY (HUIZHOU) CO., LTD. Free format text: FORMER OWNER: HUIDA ELECTRIC MACHINERY (HUIZHOU) CO., LTD. Effective date: 20080815 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080815 Address after: Longhu Development Zone, Shuikou Town, Guangdong City, Huizhou Province, China: 516005 Patentee after: Chuangle Electronics Industry (Huizhou) Co., Ltd. Address before: Huizhou Huida electromechanical (Huizhou) Co., Ltd., Longhu Development Zone, Guangdong, China: 516005 Patentee before: Huida Electromechanical (Huizhou) Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070912 |
|
| EXPY | Termination of patent right or utility model |