CN2914307Y

CN2914307Y - Air-pressure switch

Info

Publication number: CN2914307Y
Application number: CN 200620118347
Authority: CN
Inventors: 杨振华; 牟建新
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-09
Filing date: 2006-06-09
Publication date: 2007-06-20
Anticipated expiration: 2016-06-09

Abstract

An air pressure switch includes a switch box and a connector that two are connected together, wherein the switch box is provided with moving and fix contact components inside of it. To achieve the purepose, a film is arranged between the switch box and the connector, the top of the film is provided with an acetabuliform elastic membrane and a membrane holder, the central hole thereof is equipped with a dynamic mandril; the reed of the moving contact is on the top of the mandril, the lower end of the mandril contacts with the upper side of the acetabuliform elastic membrane, the junction poles of the moving and fix contact extends out of the switch box. Under the designed lower limit pressure, the elastic membrane turns over suddenly and contacts with the moving and fix contact points by the reed's effect. As other control devices are not needed, the utility model is simple in structure, compact and small in size. Moreover, no mechanical wear makes the working life extended and the performance reliable.

Description

Air pressure switch

Technical field

The utility model relates to switch, is that a kind of pressure of air that utilizes changes the air pressure switch of controlling power connection and closing.

Background technology

The various equipment that utilize compressed air as power source are worked in certain pressure limit, and air pressure is too high will to cause device damage, and air pressure crosses that low active force is too small then can not work.China Patent No. is that to be called the utility model patent specification of " a kind of air pump pressure controller " disclosed promptly be a kind of air pressure switch for 200420078481.X, name, it comprises base, diaphragm, regulator, instantaneously changing device, the contact mechanism that has joint, and be fixed on vent valve on the base, in the pressure-sensitive chamber of base, diaphragm is set, regulator is pressed on the diaphragm by top board, the rocker of top board and instantaneously changing device contacts, also be provided with the vent valve pressing plate on this springboard, with the corresponding contact of needle of vent valve.The mobile diaphragm that needs of the moving contact of above-mentioned utility model patent pushes the top board rising, promote the rocker of instantaneously changing device, when moving and surpassing critical localisation, under the elastic force effect of instantaneously changing spring, springboard is flicked rapidly, moving contact flicks and the fixed contact disjunction, so there is complex structure in above-mentioned utility model patent, and the shortcoming that volume is bigger.

The utility model content

The purpose of this utility model is to propose a kind of simple in structure, air pressure switch that volume is little.

The utility model comprises switch enclosure and the joint that is connected, be provided with dynamic and static contact assembly in the switch enclosure,, take to be provided with diaphragm between switch enclosure and the joint for achieving the above object, the top of diaphragm is provided with dish-shaped flexible sheet and diaphragm seat, is provided with push rod movingly in the centre bore of diaphragm seat; The reed of moving contact component is in the top of push rod, and the end face of dish-shaped flexible sheet is touched in the lower end of push rod, and the binding post of dynamic and static contact stretches out switch enclosure.

Be provided with sealing ring between described diaphragm and the joint.

The bottom of described joint is provided with external screw thread.

The inner face of described switch enclosure is pressed on the edge of diaphragm, and the diaphragm seat is in the switch enclosure.

The inner face of described switch enclosure is pressed on the edge of diaphragm seat, and the diaphragm seat is between switch enclosure and the diaphragm.

The outside of described switch enclosure is provided with the binding post cover overcoat within it with dynamic and static contact, respectively is connected with lead on the binding post, and lead stretches out overcoat.

Space filling between described overcoat and the switch enclosure has resin.

The utlity model has following good effect:

1. the utility model utilizes flexible sheet under capping pressure, and unstability is overturn suddenly, promotes moving contact and fixed contact disengaging by push rod.Under the threshold pression of setting, flexible sheet is upset suddenly oppositely, and moving contact contact with fixed contact under the reed effect, does not need to install by other to control, so simple in structure, compact, volume is little.

2. the utility model does not have mechanical wear, long service life, and reliable working performance.

3. the utility model only need be threaded in it on gas ducting or the container, and is easy to use, widely applicable.

4. the utility model is as adopting big capacity contact, but actuators such as direct drive motor, thus electric elements and circuit in the middle of can omitting, simplified control circuit.

Description of drawings

For the easier quilt of content of the present invention is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the present invention is further detailed explanation, wherein

Fig. 1 is embodiment 1 configuration diagram;

Fig. 2 is embodiment 2 configuration diagram;

Fig. 3 is embodiment 3 configuration diagram;

Fig. 4 is embodiment 4 configuration diagram.

Embodiment

Embodiment 1

Embodiment 1 shown in the accompanying drawing 1 has interconnective insulated switch box 1 and joint 2.Be provided with the diaphragm seat 7 of dynamic and static contact switch assembly 4,5 and insulation in the switch enclosure 1, above-mentioned moving switch module 4 has moving contact 4-1, reed 4-3 and binding post 4-2.Silent switch assembly 5 has fixed contact 5-1 and binding post 5-2.Binding post 4-2 stretches out switch enclosure 1 with 5-2 and closely is connected with switch enclosure 1 by splitting riveting, moving contact 4-1 is riveted on the spring 4-3, reed 4-3 is riveted on binding post 4-2, and fixed contact 5-1 is riveted on the binding post 5-2, and moving contact 4-1 is in the normally off that fixed contact 5-1 top is in switch.Be provided with diaphragm 3 between above-mentioned insulated switch box 1 and the joint 2, the inner face of switch enclosure 1 is pressed on the edge of diaphragm 3, the top of diaphragm 3 is provided with the diaphragm seat 7 that is in the switch enclosure 1, is provided with the dish-shaped flexible sheet 8 that can be touched by diaphragm 3 in the diaphragm seat 7.Flexible sheet 8 is according on the controlled pressure, and lower limit designs, and is provided with push rod 6 movingly in the centre bore of diaphragm seat 7, and the reed 4-3 of moving contact component 4 is in the top of push rod 6, and the end face of dish-shaped flexible sheet 8 is touched in the lower end of push rod 6.Joint 1 bottom is manufactured with external screw thread.Sealing for further guaranteeing to be connected between switch enclosure and the joint 1 is provided with sealing ring 9 between diaphragm 3 and joint 2.

The utility model is connected on compressed air piping or the air reservoir by the joint external screw thread, the joint centre bore communicates with the compressed air that charges into, when air compressor work, pressure raises, act on pressure on the flexible sheet 8 flexible sheet 8 unstability kicks when reaching the higher limit of setting by diaphragm 3, flexible sheet 8 overturns suddenly, promotes upwards kick of push rod 6, and push rod 6 promotes the reed 4-3 of moving switch module 4, reed 4-3 drives moving contact 4-1 action and breaks away from fixed contact, the instantaneous trip circuit, the stall of air compressor motor is when compressed air pressure descends, when the reseat pressure that reaches flexible sheet 8, during the threshold pression just set, flexible sheet 8 upset suddenly resets, and replys reset condition, moving, fixed contact 4-1, the 5-1 contact, moment is connected circuit, air compressor operate as normal.Present embodiment is applicable to the occasion of electric current less than 16A.

Embodiment 2

Embodiment shown in the accompanying drawing 2 is on the basis of enforcement 1, is provided with two binding post 4-2 in the outside of switch enclosure, 5-2 cover overcoat 10 within it, respectively be connected with lead 11 on two binding posts, lead 11 stretches out overcoat 10, filling epoxy resin between overcoat 10 and switch enclosure.Present embodiment is applicable to the occasion of electric current less than 16A.

Embodiment 3

Embodiment 3 shown in the accompanying drawing 3 compares with

embodiment

1, and 1. the position half-twist of binding post 4-2 and 5-2 makes expanding of binding post 4-2 and 5-2 a space on every side, utilizes this space to strengthen the contact area of moving contact 4-1 and fixed contact 5-1.2. the inner face of switch enclosure 1 is pressed on the edge of diaphragm seat 7, diaphragm seat 7 is between switch enclosure 1 and the diaphragm 3, strengthened the internal diameter of diaphragm seat, so can select the bigger flexible sheet of diameter 8 to be placed on wherein, because the area of flexible sheet 8 increases, the jerk value of flexible sheet 8 is increased, strengthened the gap between the dynamic and static contact, can prevent that the electric arc that big electric current produces from damaging dynamic and static contact.Because present embodiment has adopted two different differences of above-mentioned and embodiment 1, so can be applicable to the occasion of electric current greater than 16A.

Embodiment 4

Embodiment shown in the accompanying drawing 4 is on the basis of enforcement 3, is provided with two binding post 4-2 in the outside of switch enclosure, respectively is connected with lead 11 on 5-2 cover overcoat 10, two binding posts within it, and lead 11 stretches out overcoat 10, filling epoxy resin between overcoat 10 and switch enclosure.Present embodiment can be applicable to the occasion of electric current greater than 16A.

Claims

1, a kind of air pressure switch, comprise the switch enclosure (1) and the joint (2) that are connected, be provided with dynamic and static contact assembly (4,5) in the switch enclosure (1), it is characterized in that: be provided with diaphragm (3) between switch enclosure (1) and the joint (2), the top of diaphragm (3) is provided with dish-shaped flexible sheet (8) and diaphragm seat (7), is provided with push rod (6) movingly in the centre bore of diaphragm seat (7); The reed of moving contact component (4) is in the top of push rod (6), and the end face of dish-shaped flexible sheet (8) is touched in the lower end of push rod (6), and the binding post of dynamic and static contact (4-2,5-2) stretches out switch enclosure (1).

2, fluid high-pressure switch according to claim 1 is characterized in that: be provided with sealing ring (9) between diaphragm (3) and the joint (2).

3, air pressure switch according to claim 2 is characterized in that: the bottom of joint (2) is provided with external screw thread (2-2).

4, air pressure switch according to claim 3 is characterized in that: the inner face of described switch enclosure (1) is pressed on the edge of diaphragm (3), and diaphragm seat (7) is in the switch enclosure (1).

5, air pressure switch according to claim 3 is characterized in that: the inner face of described switch enclosure (1) is pressed on the edge of diaphragm seat (7), and diaphragm seat (7) is between switch enclosure (1) and the diaphragm (3).

6, according to claim 4 or 5 described air pressure switchs, it is characterized in that: the outside of described switch enclosure (1) is provided with the binding post cover overcoat (10) within it with dynamic and static contact, respectively be connected with lead (11) on the binding post (4-2,5-2), lead (11) stretches out overcoat (3).

7, air pressure switch according to claim 6 is characterized in that: the space filling between described overcoat (3) and the switch enclosure (1) has resin (12).