CN205984799U - Pressure control low pressure switch structure - Google Patents

Abstract

The utility model discloses a low tension switchgear, which has the advantages of simple structure, system operating stability is good, the pressure control low pressure switch structure that the reliability is high, it is on the high side to have solved the low tension switchgear sensitivity that exists among the prior art, lead to the electric switch who is correlated with to start repeatedly, impact systems's the normal operating and the life's of relevant electrical apparatus part etc. Technical problem, it establishes the last lid on the lid under including lower lid and the cover on the pipeline of liquid way of connecting in parallel, on, lower lid encloses synthetic case jointly and holds the chamber, it is equipped with micro -gap switch and case subassembly to hold the intracavity at the case, the case subassembly include the sealing cover under the lid to the curved surface flexible sheet on the interface, be equipped with on the curved surface flexible sheet that corresponds with micro -gap switch and trigger the loose piece, with trigger the micro -gap switch that loose piece top border corresponds on be equipped with the micro -gap switch contact, trigger the loose piece and contact with micro -gap switch under the promotion of curved surface flexible sheet and contact and trigger micro -gap switch.

Description

Stress control low tension switch structure

Technical field

This utility model is related to a kind of low tension switch, and more particularly, to a kind of structure is simple, and the high Stress control of reliability is low Press switch structure.

Background technology

The operation principle of pressure switch is：When in system, pressure is less than rated pressure, in induction apparatuss, video disc instantaneously occurs Mobile, connected by connection guide pull switch joint, when pressure rises specified recovery value, video disc wink resets, switch is automatically Reset, or be briefly when rated value is less than by measuring pressure, the free end of flexible member produces displacement, directly or through Promote switch element more afterwards, change the on off operating mode of switch element, reach control by the purpose of measuring pressure.Pressure switch be with The device that electric switch combines, when reaching Fluid pressure set in advance, make and break contact action, it is mainly used in electricity On the industrial equipments such as factory, petrochemical industry, metallurgy industry, output is reported to the police or control signal, has important purposes, energy in industrial circle The damage of important device in prevention production engineering, it is to avoid great production accident ground occurs.Pressure switch generally comprises mechanical type, Electronic type two big class, mechanical pressure switches therein are that purely mechanic deformation leads to microswitch action, when the pressure was increased, effect Produce deformation in different sensing pressure components and parts (diaphragm, corrugated tube, piston), open moving up the fine motion starting the top Close, make electric signal output.But the microswitch contact in existing low tension switch is generally located on the center of diaphragm, but due to liquid Inevitably fuctuation within a narrow range in road pipeline pressure, and therefore when fluid path pipeline pressure varies slightly, diaphragm triggers fine motion Change the on off operating mode of switch element after switch contact, sensitivity is higher, thus lead to the electric switch of correlation repeatedly to start, shadow The normal operation of acoustic system and the service life of associated appliance part.

Content of the invention

This utility model mainly there is provided a kind of structure simply, and system run all right is good, the high pressure control of reliability Low tension switch structure processed, solves that low tension switch sensitivity present in prior art is higher, leads to the electric switch of correlation anti- The multiple technical problem starting, affecting the normal operation of system and the service life of associated appliance part etc..

Above-mentioned technical problem of the present utility model is mainly addressed by following technical proposals：A kind of Stress control Low tension switch structure, including the lower cover being connected in parallel on fluid path pipeline and be located at upper cover body on lower cover, upper cover body and under Lid encloses valve element accommodating chamber jointly, accommodates intracavity in valve element and is provided with the microswitch being connected with external connection electrical apparatus equipment and and liquid The core assembly that road pipeline is connected, described core assembly includes curved spring diaphragm on the docking port of lower cover for the sealing cover, Curved spring diaphragm corresponding with microswitch is provided with triggering loose piece, with triggering loose piece above the corresponding microswitch in edge It is provided with microswitch contact, triggering loose piece is under the promotion of curved spring diaphragm with microswitch contact and trigger fine motion Switch.When pressure in fluid path pipeline changes, curved spring diaphragm drives triggering loose piece to be subjected to displacement, due to microswitch Contact is corresponding with the edge above triggering loose piece, and in the middle part of curved spring diaphragm, deflection is maximum, therefore position in triggering loose piece Shifting value is maximum, and when fluid path pipeline pressure fuctuation within a narrow range, diaphragm will not trigger microswitch contact, will not change switch element On off operating mode, when only the pressure in fluid path pipeline is constant, triggering loose piece is just understood with microswitch contact separation and change The on off operating mode of switch element, significantly improve reliability by simple transformation and system run all right be good, it is to avoid phase The startup repeatedly closing electric switch, it is ensured that system is normally run, extends the service life of associated appliance part.

Preferably, described curved spring diaphragm includes being located at support membrane on docking port, the edge of support membrane prolongs upwards Stretch the Shape-changeable ring forming U-shaped, Shape-changeable ring opening down simultaneously horizontally outward extends and form locating ring, and locating ring is clamped in upper cover body And between lower cover.Curved spring diaphragm is connected and composed by support membrane, Shape-changeable ring and locating ring integral type, elasticity is good, and deflection is big, Long service life.

Preferably, accommodating intracavity in described valve element to be provided with annular briquetting, the lower surface of annular briquetting is crimped on curved surface bullet On the edge of property diaphragm, the upper surface apical grafting of annular briquetting is in upper cover body and microswitch.Curved spring diaphragm passes through annular Briquetting is fitted in valve element and accommodates intracavity, and fixed form is simple and reliable.

Preferably, described triggering loose piece is in cylinder, the top surface of triggering loose piece is upwardly extended formation and is touched with microswitch The corresponding triggering plush copper of point, the bottom surface of triggering loose piece upwardly extends formation locating slot, curved spring diaphragm corresponding with locating slot Upwardly extend formation positioning plush copper, positioning plush copper interworking is plugged in locating slot.By the top surface setting triggering in triggering loose piece Plush copper, improves the motility that triggering loose piece moves up and down, and passes through to position plush copper and trigger the step being formed between loose piece and can limit simultaneously Surely go up shifting amount, it is to avoid during high pressure, impact is produced to microswitch contact, improve reliability.

Preferably, being arranged with annular base on the docking port of described lower cover, lower cover is plugged on annular base Middle in the hole is simultaneously fixed on the corresponding interface of fluid path pipeline by annular base.Lower cover is fixed on influidic pipe by annular base On the corresponding interface in road, fixed form is simple and reliable, easy accessibility.

As it is further preferred that being folded with sealing shroud between the mating annular face of described lower cover and annular base.Sealing shroud is true Protect the sealing that lower cover is connected with fluid path pipeline.

Therefore, a kind of Stress control low tension switch structure tool of the present utility model has the advantage that：Due in triggering loose piece Portion's shift value is maximum, and therefore when fluid path pipeline pressure fuctuation within a narrow range, diaphragm will not trigger microswitch contact, only in fluid path When pressure in pipeline is constant, triggering loose piece is just understood with microswitch contact separation and is changed the on off operating mode of switch element, letter Single transformation significantly improves system reliability and operation stability, it is to avoid the startup repeatedly of associated appliance switch is it is ensured that be System is normal to be run, and extends the service life of associated appliance part；Lower cover is fixed on fluid path pipeline by annular base and corresponds to Interface on, fixed form is simple and reliable, easy accessibility.

Brief description：

Fig. 1 is a kind of structural representation of this utility model Stress control low tension switch structure.

Specific embodiment：

Below by embodiment, and combine accompanying drawing, the technical solution of the utility model is described in further detail.

Embodiment：

As shown in figure 1, a kind of Stress control low tension switch structure of the present utility model, including being connected in parallel on fluid path pipeline Lower cover 1 and be located at upper cover body 2 on lower cover 1 by screw docking, upper cover body 2 and lower cover 1 enclose valve element jointly Accommodating chamber 3, in valve element accommodating chamber 3 built with the microswitch 4 being connected with external connection electrical apparatus equipment and the valve being connected with fluid path pipeline Core assembly, core assembly therein includes curved spring diaphragm 61 on the docking port 5 of lower cover 1 for the sealing cover, and docking port 5 is located at The middle part of lower cover 1, curved spring diaphragm 61 includes being located at support membrane 611 on docking port 5 again, the edge of support membrane 611 to Upper extend the Shape-changeable ring 612 forming U-shaped, Shape-changeable ring 612 opening down simultaneously horizontally outward extends and forms locating ring 613, positioning Ring 613 is clamped in valve element accommodating chamber 3 between corresponding upper cover body 2 and lower cover 1 further through annular briquetting 7, under annular briquetting 7 Surface is crimped on locating ring 613, the horizontal apical grafting of upper surface of annular briquetting 7 in upper cover body 2 and microswitch 4 bottom surface, with Equipped with triggering loose piece 62 on the corresponding support membrane 611 of microswitch 4, triggering loose piece 62 is in cylinder, the top surface of triggering loose piece 62 Upwardly extend formation triggering plush copper 621, the bottom surface of triggering loose piece 62 upwardly extends formation locating slot 622, corresponding with locating slot 622 Curved spring diaphragm 61 upwardly extend formation positioning plush copper 614, positioning plush copper 614 interworking be plugged in locating slot 622, with touch Send out the plush copper 621 corresponding microswitch in top edge 4 and be provided with microswitch contact 41, triggering loose piece 62 is in curved spring diaphragm Contact with microswitch contact 41 under 61 promotion and trigger microswitch 4, in order to limit the up displacement of triggering loose piece 62, The inner ring surface level of annular briquetting 7 extends inwardly to, and limits the top of triggering loose piece 62 and forms gap, this gap width triggers The maximum Top Runby of loose piece 62.Annular base 8 is connected with the docking port 5 of lower cover 1, lower cover 1 is plugged on annular base 8 Middle in the hole and be fixed on the corresponding interface of fluid path pipeline by annular base 8, in the annular of lower cover 1 and annular base 8 It is folded with sealing shroud 9 between mating surface again.

Specific embodiment described herein is only to design of the present utility model explanation for example.This utility model Person of ordinary skill in the field can make various modifications or supplement or adopt class to described specific embodiment As mode substitute, but without departing from of the present utility model spirit or surmount scope defined in appended claims.

Claims (6)

1. a kind of Stress control low tension switch structure, including the lower cover being connected in parallel on fluid path pipeline（1）And it is located at lower cover （1）On upper cover body（2）, upper cover body（2）And lower cover（1）Jointly enclose valve element accommodating chamber（3）, in valve element accommodating chamber（3） Inside it is provided with the microswitch being connected with external connection electrical apparatus equipment（4）And the core assembly that is connected with fluid path pipeline it is characterised in that：Institute State core assembly and include sealing cover in lower cover（1）Docking port（5）On curved spring diaphragm（61）, with microswitch（4） Corresponding curved spring diaphragm（61）It is provided with triggering loose piece（62）, with triggering loose piece（62）The top corresponding fine motion in edge is opened Close（4）It is provided with microswitch contact（41）, trigger loose piece（62）In curved spring diaphragm（61）Promotion under and microswitch Contact（41）Contact and trigger microswitch（4）.

2. Stress control low tension switch structure according to claim 1 it is characterised in that：Described curved spring diaphragm（61） Including being located at docking port（5）Upper support membrane（611）, support membrane（611）Edge upwardly extend formed U-shaped Shape-changeable ring （612）, Shape-changeable ring（612）Opening down and horizontally outward extend formed locating ring（613）, locating ring（613）On being clamped in Lid（2）With lower cover（1）Between.

3. Stress control low tension switch structure according to claim 1 and 2 it is characterised in that：In described valve element accommodating chamber （3）Inside it is provided with annular briquetting（7）, annular briquetting（7）Lower surface be crimped on curved spring diaphragm（61）Edge on, annular pressure Block（7）Upper surface apical grafting in upper cover body（2）And microswitch（4）On.

4. Stress control low tension switch structure according to claim 1 and 2 it is characterised in that：Described triggering loose piece（62） In cylinder, trigger loose piece（62）Top surface upwardly extend formation with microswitch contact（41）Corresponding triggering plush copper（621）, Triggering loose piece（62）Bottom surface upwardly extend formation locating slot（622）, with locating slot（622）Corresponding curved spring diaphragm（61） Upwardly extend formation positioning plush copper（614）, position plush copper（614）Interworking is plugged on locating slot（622）Interior.

5. Stress control low tension switch structure according to claim 1 and 2 it is characterised in that：In described lower cover（1）'s Docking port（5）On be arranged with annular base（8）, lower cover（1）It is plugged on annular base（8）Middle in the hole and pass through annular base （8）It is fixed on the corresponding interface of fluid path pipeline.

6. Stress control low tension switch structure according to claim 5 it is characterised in that：In described lower cover（1）With ring Shape base（8）Mating annular face between be folded with sealing shroud（9）.