CN2139305Y - Pressure switch - Google Patents

Abstract

The utility model relates to a hydraulic electric appliance integrated pressure control element which converts pressure signal into electric signal and is used for pressure control in a hydraulic system. The utility model comprises joints, a rubber film, a force collecting slice, a push rod, a movable contact reed, a stationary contact, a spring, regulating screws, electrodes, a switch socket, line connecting screws, a passing through mechanism, a pressure regulating mechanism, wherein, the joints are connected with the hydraulic system, and the line connecting screws are used to connect with an external circuit. The utility model avoids the problems of the existing components, such as large size, large weight, high price and fussy regulating.

Description

Pressure switch

The utility model discloses the conversion equipment that in a kind of hydraulic system pressure signal is changed into the signal of telecommunication---pressure switch.

Pressure control valve is the element that often adopts in the hydraulic system.At present, in the hydraulic system, the pressure control valve that pressure signal is converted to the signal of telecommunication mostly adopts pressure switch, pressure controller, electro connecting pressure gauge, and the common problem that exists of these elements is:

1, volume is big, and weight is big;

2, price height;

3, adjustment is loaded down with trivial details.

The purpose of this utility model is to provide a kind of simple and convenient, cheap pressure control valve---pressure switch.

Accompanying drawing is an installation diagram, ratio 2:1.

The utility model comprises: joint (1), rubber film (2), collection power sheet (3), push rod (4), movable contact reed (5), stationary contact (6), spring (7), adjustment screw (8), electrode (9), switch base (10), terminal screw (11).

Joint (1) bottom is connected with hydraulic system.Joint (1) top and rubber film (2) constitute hydraulic cavities, and rubber film (2) seals simultaneously.Push rod (4), moving contact reed (5), fixed contact (6), spring (7), electrode (9), switch base (10) constitute a little sensitive switch, mechanism in having.Change the structure of fixed contact (6), can constitute normal battle of sensitive switch or normally closed some sensitive switch.Spring (7), adjustment screw (8) constitute pressure adjustmenting mechanism, select for use the spring of different coefficient of elasticity can change the pressure setting range.Terminal screw (9) is used for and being connected of external circuit.

Principle of the present utility model is: pressure liquid acts on the film, make push rod produce upwards thrust by collection power sheet, can set starting pressure by adjusting screw (8), when thrust surpasses the active force of spring, push rod moves up, and drives the motion of moving contact reed, served as mid point after, the action of moving point, normal make war closed (or normally closed point disconnects).

In order to prevent to move excessively, cause that moving contact reed, collection power sheet damage, and prop up collection power sheet with the switch base shoulder, control sets power sheet stroke because of push rod.When hydraulic pressure reduced, push rod drove the reposition of moving contact reed under spring action, and normal the battle disconnects (or normally closed closed).

The utility model is compared with existing provided as one homogeneous element and is had the following advantages:

1, volume is little, in light weight, easy for installation;

2, cheap;

3, eliminate the critical condition that electro connecting pressure gauge exists, prolonged useful life;

4, stable and reliable working performance.

Claims (4)

1. The utility model is a kind ofly to change pressure signal the pressure control switch of the signal of telecommunication into, and it comprises joint, rubber film, collection power sheet, push rod, moving contact reed, fixed contact, spring, adjustment screw, electrode, switch base, terminal screw; Electrode, moving contact, fixed contact are formed fine motion and are made war, and it is to be contained in switch to take that fine motion is made war, and whole switch is sat and is pressed on the joint with mechanical flanging, rely on the elasticity sex change of rubber film to realize sealing, prevent from pressure release to it is characterized in that:

   1, is the integrated element of hydraulic electric appliance;
2. 2, pressure adjustmenting mechanism is arranged;
3. 3, had middle mechanism;
4. 4, moving contact reed return and starting pressure are regulated and are finished by same spring.