CN202601510U

CN202601510U - Pressure switch

Info

Publication number: CN202601510U
Application number: CN 201220112777
Authority: CN
Inventors: 维吉尼亚安通纳斯
Original assignee: ANTUNES EQUIPMENT MANUFACTURING (SUZHOU) Co Ltd
Current assignee: ANTUNES EQUIPMENT MANUFACTURING (SUZHOU) Co Ltd
Priority date: 2012-03-23
Filing date: 2012-03-23
Publication date: 2012-12-12
Anticipated expiration: 2022-03-23

Abstract

The utility model discloses a pressure switch, which comprises a base, an elastic membrane and a switch box, wherein the upper end face of the base is provided with the elastic membrane, the side faces of the base are respectively provided with positive and negative pressure ports; the periphery of the elastic membrane and the base are connected in a sealing manner to form a first chamber; the elastic membrane is fixedly connected with an instantaneous moving disk, of which the symmetric center is provided with a top rod; the lower end face of the switch box is provided with a groove, of which the capacity is greater than the volume of the first chamber, and a position, corresponding to the top rod, on the bottom of the groove is provided with a microswitch; the groove is covered on the first chamber and is connected with the base in a sealing manner to form a second chamber; and the positive and negative pressure ports are respectively communicated with the first chamber and the second chamber. According to the utility model, as the first chamber is covered in the second chamber, the elastic membrane will elastically deform due to pressure difference between the outside and the inside when positive pressure air is introduced into the first chamber or negative pressure air is introduced into the second chamber. Therefore, the pressure switch disclosed by the utility model can both used in positive pressure air monitoring and negative pressure air monitoring.

Description

A kind of pressure switch

Technical field

The utility model relates to a kind of pressure switch, and particularly a kind of monitoring that promptly can be used for positive pressure air can be used for the pressure switch of the monitoring of negative pressure air again.

Background technology

Pressure switch be through the monitoring cut-in pressure achieve a butt joint into press device break-make open and close controlling.At present, pressure switch includes electronic pressure switch and mechanical compression switch.Electron pressure switch adopts built-in precision pressure sensor to realize pressure monitor, and its cost uses on industry control control requires than higher system than higher usually; And the mechanical compression switch development time early, because its stable work in work is with low cost; Still be widely used in the less demanding system of operating mode control; Its operation principle is when by the measuring pressure overrate, and the free end of flexible member (like flexible sheet, bellows etc.) produces displacement, directly or after relatively promotes switch element; Change the on off operating mode of switch element, reach control by the purpose of measuring pressure.In the prior art, the mechanical compression switch that is used to monitor air pressure is only with the monitoring malleation or only with the monitoring negative pressure, and is poor for applicability.

The utility model content

For solving the problems of the technologies described above, the utility model provides a kind of pressure switch, to reach the monitoring that promptly can be used for positive pressure air, can be used for the monitoring of negative pressure air again, is suitable for good purpose.

For achieving the above object, the technical scheme of the utility model is following:

A kind of pressure switch comprises base, flexible sheet and switch enclosure, and the upper surface of said base is provided with flexible sheet, is respectively arranged with the positive and negative pressure interface on its side end face; The periphery of said flexible sheet and said base are tightly connected and form first chamber; Be fixedly connected with the wink Moving plate on the said flexible sheet, said wink the symmetrical centre of Moving plate be provided with push rod; Said switch enclosure lower surface is provided with the groove of volume greater than said first chamber volume, is installed with sensitive switch corresponding to said push rod in the said groove; Said groove covers on said first chamber and is tightly connected with said base and forms second chamber; Said positive pressure interface is communicated with said first chamber, and said negative pressure interface is communicated with said second chamber.

Preferably, also be provided with the through hole coaxial with said push rod on the said switch enclosure, be provided with spring coil in the said through hole, the lower end of described spring coil is connected with said sensitive switch, and its upper end is connected with the spring adjusting mechanism.

Preferably; Said spring adjusting mechanism is made up of button lid, rotation circle and button core; Said button lid is fixedly connected on said through hole top; Said rotation circle cutting ferrule is between the draw-in groove that said button covers and said switch enclosure is preset, and said button core is located in the said rotation circle and with rotate circle and is threaded, and its cylindrical lower end is arranged with O type circle and inserts said through hole top and the flexible connection of said through hole.

Pass through technique scheme; A kind of pressure switch that the utility model provides is through covering in first chamber in second chamber; No matter be to feed positive pressure air then, also feed negative pressure air, all can make first chamber produce corresponding strain because of pressure differential makes flexible sheet toward second chamber toward first chamber; When deflection reaches set point; Just the push rod that drives on the wink Moving plate promotes the sensitive switch action to realize being switched on or switched off of its switch contact, when needs detect control to positive pressure air, inserts positive pressure air in positive pressure interface and gets final product; When need detect control to negative pressure air, then insert negative pressure air and get final product in the negative pressure interface, therefore, the utility model promptly can be used for the detection of positive pressure air and controls the detection control that can be used for negative pressure air again, has embodied the better advantage of applicability.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below.

Fig. 1 is the explosive view of the disclosed a kind of pressure switch of the utility model embodiment;

Fig. 2 is the sketch map of disclosed first chamber of the utility model embodiment and second chamber.

Embodiment

To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment will be carried out clear, intactly description.

The utility model provides a kind of pressure switch, and is as depicted in figs. 1 and 2, comprises base 1, flexible sheet 2 and switch enclosure 3, and the upper surface of said base 1 is provided with circular flexible sheet 2, is respectively arranged with positive pressure interface 4 and negative pressure interface 5 on the one of which side end face; The periphery of said flexible sheet 2 and said base 1 are tightly connected and form first chamber 100; Be fixedly connected with wink Moving plate 6 on the said flexible sheet 2, said wink Moving plate 6 symmetrical centre be provided with push rod 601; Said switch enclosure 3 lower surfaces are provided with the groove of volume greater than said first chamber, 100 volumes, are provided with sensitive switch 7 corresponding to said push rod 601 in the said groove; Said groove covers on said first chamber 100 and is tightly connected through seal 10 with said base 1 and forms second chamber 200; In this, said positive pressure interface 4 is communicated with through first passage 401 with said first chamber 100, and said negative pressure interface 5 is communicated with through second channel 501 with said second chamber 200.Flexible sheet 2 in the utility model adopts high performance rubber; When in positive pressure interface 4 or negative pressure interface 5 connection operating pressures; Flexible sheet 2 produces distortion; Make operating pressure through wink Moving plate 6 put on the push rod 601, then when operating pressure reached certain value, push rod 601 was to top offset and promote sensitive switch 7 actions.In this; Said sensitive switch 7 comprises metallic gasket 701, spring leaf 702, upper contact 703, lower contact 704; One end of said spring leaf 702 is fixedly connected with said metallic gasket 701, and its other end is provided with strain and is bending and is butted on the shell fragment 702a on 701 times rib 701a of said metallic gasket; On the said spring leaf 702, and outside said shell fragment 702a, also be provided with moving contact 702b; Said upper contact 703, lower contact 704 correspond respectively to the upper and lower side that said moving contact 702b is located at said spring leaf 702.Said moving contact 702b is contacted with lower contact 704 by the elastic reaction of shell fragment 702a, and in this, the contact spacing of sensitive switch 7 is little, actuating length is short, press that power is little, break-make is rapid.When push rod 601 is used for spring leaf 702 with masterpiece, when being displaced to critical point, spring leaf 702 just produces instantaneous operation, and the moving contact 702b of spring leaf 702 and lower contact 704 are broken off fast, and connect fast with upper contact 703; When the normal pressure of first chamber 100 is reduced to or second chamber, 200 negative pressure when beginning to rise to specified recovery value; Moving plate 6 drove push rods 601 and resetted wink; 7 of sensitive switches are at push rod 601 reverse strokes and after reaching the action critical point of spring leaf 702; Moving contact 702b resets under the elastic reaction of shell fragment 702a, changes the on off operating mode of sensitive switch 7 with this, thereby reaches control by the purpose of measuring pressure.

Simultaneously; In present embodiment, also be provided with the through hole 301 coaxial on the said switch enclosure 3, in this with said push rod 601; The metallic gasket 701 of sensitive switch 7 is provided with square opening corresponding to said through hole 301; Said spring leaf 702 is provided with convexity corresponding to said through hole 301, so that spring leaf 702 lower surfaces are recess corresponding to said push rod 601, is beneficial to rise when push rod 601 upwards transmits thrust position-limiting action; In addition, be provided with spring coil 8 in the said through hole 301, the lower end of described spring coil 8 and said sensitive switch 7 flexibly connect, and its upper end is connected with spring adjusting mechanism 9.In this; Said spring adjusting mechanism 9 is made up of button lid 901, rotation circle 902 and button core 903; Said button lid 901 is fixedly connected on said through hole 301 tops; Said rotation is enclosed 902 cutting ferrules between the preset draw-in groove 302 of said button lid 901 and said switch enclosure 3, and said button core 903 is located in the said rotation circle 902 and is rotated with institute and encloses 902 and be threaded, and its cylindrical lower end is arranged with O type circle 904 and inserts said through hole 301 tops and 301 flexible connections of said through hole.Be threaded with button core 903 through rotation circle 902; When rotation rotation circle 902; Can make button core 903 produce the advance and retreat of screw thread with it, come the initial pressure of regulating spring circle 8, thereby the operating pressure value that makes push rod 601 produce displacement changes with the screw-in depth of control knob core 903 in through hole 301; The operating pressure value of switch motion changes, and realizes the effect of setting pressure switch motion point on request with this.In this, pressure set points can also realize regulating, to adapt to more use occasion except regulating through the degree of depth of adjusting knob core 903 in through hole 301 through the spring coil 8 of selecting different-stiffness for use.

The operation principle of the utility model is described below: when when positive pressure interface 4 inserts positive pressure air, second chamber 200 passes through second channel 501 and negative pressure interface 5 and atmosphere, or when when negative pressure interface 5 inserts negative pressure airs; 100 of first chambers are through first passage 401 and positive pressure interface 4 and atmosphere, more than under two kinds of situation, all can make the pressure in the chamber 100 of winning be higher than the outer pressure of chamber; Make flexible sheet 2 that strains take place, order about wink Moving plate 6 and drive push rods 601 and upwards be subjected to displacement and promote spring leaf 702 that the power that balances each other with this power is from the elastic force of 8 pairs of spring leafs of spring coil 702 and push rod 601; In this, the elastic force of spring leaf 702 self shell fragment 702a is very little, and the thrust of upwards transmitting with push rod 601 comparatively speaking; Can ignore, therefore, operating pressure at first overcomes the precompression of spring coil 8; Along with the increase of operating pressure, the power that surpasses precompression makes push rod 601 continue upwards to produce displacement, makes spring coil 8 produce compression; Promote the moving contact 702b action of sensitive switch 7 up to item bar 601; Thereby realize the effect of switch motion under certain operating pressure, when operating pressure reduces, spring coil 8 elastic resets; Moving plate 6 drove push rods 601 and set back wink, thereby sensitive switch 7 is also resetted.

Pass through technique scheme; A kind of pressure switch that the utility model provides is through covering in first chamber 100 in second chamber 200; No matter be to feed positive pressure air then, also feed negative pressure air, all can make first chamber 100 produce corresponding strain because of pressure differential makes flexible sheet 2 toward second chamber 200 toward first chamber 100; When deflection reaches set point; Just the push rod 601 that drives on the wink Moving plate 6 promotes sensitive switches 7 actions to realize being switched on or switched off of its switch contact, when needs detect control to positive pressure air, inserts positive pressure air in positive pressure interface 4 and gets final product; When need detect control to negative pressure air, then insert negative pressure air and get final product in negative pressure interface 5, therefore, the utility model promptly can be used for the detection of positive pressure air and controls the detection control that can be used for negative pressure air again, has embodied the better advantage of applicability.

To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the utility model or scope in other embodiments among this paper.Therefore, the utility model will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims

1. a pressure switch is characterized in that, comprises base, flexible sheet and switch enclosure, and the upper surface of said base is provided with flexible sheet, is respectively arranged with the positive and negative pressure interface on its side end face; The periphery of said flexible sheet and said base are tightly connected and form first chamber; Be fixedly connected with the wink Moving plate on the said flexible sheet, said wink the symmetrical centre of Moving plate be provided with push rod; Said switch enclosure lower surface is provided with the groove of volume greater than said first chamber volume, is installed with sensitive switch corresponding to said push rod in the said groove; Said groove covers on said first chamber and is tightly connected with said base and forms second chamber; Said positive pressure interface is communicated with said first chamber, and said negative pressure interface is communicated with said second chamber.

2. a kind of pressure switch according to claim 1; It is characterized in that, also be provided with the through hole coaxial on the said switch enclosure, be provided with spring coil in the said through hole with said push rod; The lower end of described spring coil is connected with said sensitive switch, and its upper end is connected with the spring adjusting mechanism.

3. a kind of pressure switch according to claim 2; It is characterized in that; Said spring adjusting mechanism is made up of button lid, rotation circle and button core, and said button lid is fixedly connected on said through hole top, and said rotation circle cutting ferrule is between the draw-in groove that said button lid and said switch enclosure are preset; Said button core is located in the said rotation circle and with rotate circle and is threaded, and its cylindrical lower end is arranged with O type circle and inserts said through hole top and the flexible connection of said through hole.