CN2131197Y - Pressure switch - Google Patents
Pressure switch Download PDFInfo
- Publication number
- CN2131197Y CN2131197Y CN 92207150 CN92207150U CN2131197Y CN 2131197 Y CN2131197 Y CN 2131197Y CN 92207150 CN92207150 CN 92207150 CN 92207150 U CN92207150 U CN 92207150U CN 2131197 Y CN2131197 Y CN 2131197Y
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- CN
- China
- Prior art keywords
- pressure
- pressure switch
- contact
- fixed
- base
- 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 pressure switch which belongs to the gas electric convertor or the liquid electric convertor. The utility model comprises pressure sensitive elements, a regulating device, movable contacts, fixing contacts, a base and a casing. The pressure switch is characterized in that the pressure sensitive elements adopt film composite or corrugated pipes; the movable contacts are directly welded on the pressure sensitive elements; controlled by air pressure or liquid pressure, the fixing contacts are installed in the regulating device and on the same central line with the movable contacts, and the defect of the prior art is overcome. The utility model has the advantages of simple structure, small size, light weight, high precision and stable performance, having application to automatic control system or alarm device.
Description
The utility model relates to a kind of pneumoelectric or liquid electric transducer that is used for automatic control system or warning device, is commonly referred to as pressure switch.
At present extensively its structural representation of pressure switch that adopts as shown in Figure 2, it is based on the reaction force that produces displacement with a garden post helical spring (19) when being compressed, and comes the balanced action suffered gas pressure of diaphragm (20) thereon.Simultaneously, the displacement of diaphragm promotes an end riveting by push rod (21) the spring leaf (22) of armature contact, thereby has realized that circuit is by giving being switched on or switched off of level pressure power.In this version, garden post helical spring is to use as senser.Because its dimensional accuracy is not high, adds that the long-time stability of its spring performance and repeatability are all relatively poor.And this pressure switch adopts riveting that the spring leaf of contact and the cushion block of stationary spring are arranged, insulation boards etc. produce internal stress in processing and assembling process, the variation of these residual stresss can cause the additional displacement of contact in long-term the use, thereby brings additive error.The shortcoming of this pressure switch is that complex structure, volume are big, is difficult for miniaturization.
A kind of improved pressure switch, the existing application in aviation, its structural representation is as shown in Figure 3.The elastic sensing element (23) of its employing function admirable is experienced the pressure of gas or liquid, and producing displacement behind the diaphragm pressurized has the spring leaf of contact to be switched on or switched off by predetermined pressure with the realization circuit by push rod (24) promotion riveting.But the cross-over block (27) etc. that the top riveting of this pressure switch has the movable spring sheet (25) of contact and stationary spring (26) and backing plate is installed is identical with the structure of preceding a kind of pressure switch thereby have above-mentioned shortcoming equally.
The purpose of this utility model is just in order to overcome the shortcoming that above-mentioned prior art exists, and a kind of new structure that provides, it is made up of adjusting device, housing and the base of senser that drives the contact and band fixed contact.When air pressure or hydraulic pressure from connect chew enter senser after, senser expands and produces corresponding displacement, and drives the contact and move up, when pressure reached set point, armature contact contacted with fixed contact on the adjusting device and makes the circuit connection.If when assembling, fixed contact is transferred to and the moving contact connection by adjusting device, just become the negative pressure switch, when senser passes to negative pressure, produce and shrink, moving contact is moved down, the contact becomes disconnection when negative pressure reaches set point.
Below in conjunction with embodiment composition of the present utility model is described in detail as follows:
Structure of the present utility model as shown in Figure 1, by adjustment screw (1), locking nut (2), compression spring (3), connect and chew (9), base (10), packing ring (11), open washer (12), screw (13), packing ring (14), lug plate (15), lug plate (16), spring washer (17) and nut (18) composition fixed contact (4), plug screw (5), housing (6), moving contact (7), senser (8).
Pressure-sensing device (8) can be that film closes also can be bellows, center weldering is with moving contact (7) on it, (9) are chewed in the weldering of following center to connect, the senser combination is fixed on the base (10) with nut (18) by packing ring (14), lug plate (16), spring washer (17), and base is fixed on the housing by four symmetrical screws (13) and open washer (12), packing ring (11).One of them screw lug plate (15), base is made with folder glass cloth bakelite, plays insulating effect, and pressure switch is by lug plate (15), (16) output make-and-break signal.Housing (6) is used the aluminium alloy manufacturing, and its central upper portion position is fixed adjusting device by locking nut.One compression spring (3) is arranged in the adjustment screw (1), and there is a fixed contact (4) its underpart, by plug screw (5) fixed contact is limited in the adjustment screw, and all in adjustment screw part in addition all adopt silver plate, to guarantee excellent conducting performance.Fixed contact, moving contact all adopt the noble metal contactor material.After upper and lower contact was connected, if when being continued to increase by measuring pressure, upper contact was forced to overcome on the pressure of compression spring and moves, and has avoided the excessive contact-making surface distortion that causes of upper and lower contact contact pressure, plays a protective role.The compression spring that links to each other with fixed contact in the utility model only plays the positioning action to fixed contact, as long as spring makes upper contact tightly lean on " A " face of position plug screw, the error of pressure switch on-off just can keep constant, and compression size of spring own and changes of properties are to the not influence of precision of pressure switch, because not high to the specification requirement of compression spring, the processing cost of product reduces simultaneously.Because the fixing and regulating system compact size relevant with fixed contact, the adjustment screw diameter may diminish to 6 millimeters or littler, and the diameter of whole pressure switch only depends on the senser of bottom, at present the bellows that adopts, diameter is 26 millimeters, and then the maximum outside diameter of pressure switch only is 40 millimeters.If senser adopts bellows, then the volume of pressure switch can be done forr a short time.
Because the important improvement on the part-structure relevant with fixed contact, make of the present utility model simple in structure, volume is little, in light weight, cost is low, adjustment is easy, precision is high, long-time stability are good.Description of drawings:
Fig. 1 is a structure chart of the present utility model
Fig. 2 is the schematic diagram of existing pressure switch
Fig. 3 is the schematic diagram of another kind of pressure switch.
Claims (7)
1, a kind of pressure switch is made up of pressure-sensing device, adjusting device, moving contact, fixed contact, base and housing, it is characterized in that:
1. the last center weldering of pressure-sensing device (8) is with moving contact (7), (9) are chewed in the weldering of following center to connect, this combination is fixed on the base (10) with nut (18) by packing ring (14), lug plate (16), spring washer (17), base is fixed on the housing (6) by 4 symmetrical screws (13) and open washer (12), packing ring (11), one of them screw lug plate (15);
2. adjusting device adopts adjustment screw (1), a compression spring (3) is equipped with in inside, one fixed contact (4) is arranged at the spring bottom, by plug screw (5) fixed contact is limited in the adjustment screw, and whole adjusting device is fixed on the central upper portion position of housing (6) by locking nut (3).
2, pressure switch as claimed in claim 1 is characterized in that: said housing (6) manufactures garden cylindricality tubular with aluminium alloy.
3, pressure switch as claimed in claim 1 is characterized in that: said pressure-sensing device (8) closes for film.
4, pressure switch as claimed in claim 1 is characterized in that: said pressure-sensing device (8) is a bellows.
5, pressure switch as claimed in claim 1 is characterized in that: said base is made with folder glass cloth bakelite.
6, pressure switch as claimed in claim 1 is characterized in that: the compression spring of dress, plug screw adopt silver plate in the said adjustment screw.
7, pressure switch as claimed in claim 1 is characterized in that: said fixed contact and moving contact all adopt the manufacturing of noble metal contactor material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92207150 CN2131197Y (en) | 1992-04-21 | 1992-04-21 | Pressure switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92207150 CN2131197Y (en) | 1992-04-21 | 1992-04-21 | Pressure switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2131197Y true CN2131197Y (en) | 1993-04-28 |
Family
ID=33762125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92207150 Expired - Fee Related CN2131197Y (en) | 1992-04-21 | 1992-04-21 | Pressure switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2131197Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293586C (en) * | 2003-09-28 | 2007-01-03 | 沈鍀桓 | Vernier fluid control switch |
| CN102420075A (en) * | 2010-09-27 | 2012-04-18 | 中国北车集团大同电力机车有限责任公司 | Pressure switch |
| CN103085087A (en) * | 2013-01-30 | 2013-05-08 | 赵忠华 | Auto-controlled shaver |
| CN103150868A (en) * | 2013-02-05 | 2013-06-12 | 太原市精微测控技术有限公司 | Air pressure type electronic information equipment failure alarm device |
| CN103197701A (en) * | 2013-02-05 | 2013-07-10 | 太原市精微测控技术有限公司 | Pressure controller |
-
1992
- 1992-04-21 CN CN 92207150 patent/CN2131197Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293586C (en) * | 2003-09-28 | 2007-01-03 | 沈鍀桓 | Vernier fluid control switch |
| CN102420075A (en) * | 2010-09-27 | 2012-04-18 | 中国北车集团大同电力机车有限责任公司 | Pressure switch |
| CN103085087A (en) * | 2013-01-30 | 2013-05-08 | 赵忠华 | Auto-controlled shaver |
| CN103085087B (en) * | 2013-01-30 | 2015-08-12 | 赵忠华 | A kind of autocontrol shaver |
| CN103150868A (en) * | 2013-02-05 | 2013-06-12 | 太原市精微测控技术有限公司 | Air pressure type electronic information equipment failure alarm device |
| CN103197701A (en) * | 2013-02-05 | 2013-07-10 | 太原市精微测控技术有限公司 | Pressure controller |
| CN103197701B (en) * | 2013-02-05 | 2015-11-25 | 太原市精微测控技术有限公司 | A kind of pressure controller |
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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 |