CN2914298Y

CN2914298Y - Knob-type operating mechanism able to be automatically reset of spot switch of electrically operated value

Info

Publication number: CN2914298Y
Application number: CN 200620025592
Authority: CN
Inventors: 范改青; 闫凤文
Original assignee: TIANJIN BAILI ERTONG MACHINERY CO Ltd
Current assignee: TIANJIN BAILI ERTONG MACHINERY CO Ltd
Priority date: 2006-03-22
Filing date: 2006-03-22
Publication date: 2007-06-20
Anticipated expiration: 2016-03-22

Abstract

The utility model relates to an automatically reset knob-type operation structure in valve electrical field switch. The utility model includes a fixation plate and a switch box holder, and is charactering in that the fixation plate and the switch box holder are penetrated with a switch shaft which has a round plummer, the rear part of the switch shaft extends into the intracavity of the valve electrical control and the front part extends out of the switch box holder, a torsion spring is fixed on the round plummer, limit stop screws for the torsion spring are fixed between the two torsion beams of the torsion spring and near the round plummer of the switch shaft on the inside of the switch box holder, the shaft body of the switch shaft between the fixation panel and the switch box holder is provided with a dial disk which has a hook and the hook is fastened between the two torsion beams of the torsion spring. The advantageous of the utility model are reliable sealing performance, explosion-proof and out door usage, the knob-type operation structure can save labors in operation and reset flexibly as well as move in two directions so as to control two electrical executive components according to requirement and improve the control function.

Description

The automatically reset knob operating mechanism of the on-the-spot switch of electric device for valve

Technical field

The utility model belongs to the parts of electric switch, particularly relates to the automatically reset knob operating mechanism of the on-the-spot switch of a kind of electric device for valve.

Background technology

The electrically operated control of electric device for valve usually in two ways, a kind of is control room remote handle or program control, another kind is on-the-spot Artificial Control, on-the-spot Artificial Control is by on-the-spot manual operation device, be that device such as electric switch is realized, it comprises that control far away and field control switch change over switch, the control switch of electric device for valve and the positional lock that switch stops indicator light, change over switch etc. of usefulness.Because these devices are arranged on the electric device of valve, and because the residing environment of valve is often complicated, as the scene be positioned at the open air, there is flammable explosive gas etc. in the scene, thereby its structure not only wants firm, reliable, volume is less relatively, but also to adapt to these abominable operating modes, satisfy specification requirements such as explosion-proof, outdoor use, so its design has certain degree of difficulty.In present known technology, most of on-the-spot manual operation devices all adopt push-button switch, the operation of its loop break-make is that the contact trigger mechanism of using the operating mechanism that is made of cylinder button and back-moving spring to touch in the airtight control chamber is finished, because it is above-mentioned explosion-proof for satisfying, the requirement of operating modes such as open air, the length of the cylinder type flameproof joint of push-button switch, be that the button cylinder has certain requirement with the axial length that cooperates of switch box seated hole, its length is longer relatively, and button is by spring reset, require spring that bigger elastic force is arranged, so operation is effort, if reduce spring force, then long-term open air use can make the push-button reset difficulty again.

Summary of the invention

The utility model provides a kind of specification requirement that can satisfy explosion-proof and outdoor use for solving the technical problem that exists in the known technology, again rapid operation, the automatically reset knob operating mechanism of electric device for valve scene switch flexibly resets.

The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is:

The automatically reset knob operating mechanism of the on-the-spot switch of a kind of electric device for valve, include fixed head, be installed in the switch cassette holder on the fixed head, on fixed head and switch cassette holder, have concentric axis hole, be coated with its middle switch shaft that has concentric circular pillow block in the axis hole, the rear end of switch shaft stretches out in outside the fixed head, front end stretches out in outside the switch cassette holder, the cavity place of the circular pillow block of switch shaft between fixed head and switch cassette holder, be set with torsionspring on it, switch cassette holder inboard at other two the torsionspring stop screws of turning round between the arm that are stuck in torsionspring that are fixed with of the circular pillow block of switch shaft, have two dials of turning round between the arm that crotch and crotch also are stuck in torsionspring on the axle body at the cavity place between fixed head and the switch cassette holder, also being fixed with of switch shaft.

Advantage and the good effect that the utlity model has are: because the utility model adopts the knob operating mechanism, the flame proof sealing surface is positioned on the switch cassette holder, axial arrangement is short, can isolate interior exocoel preferably, sealing property is reliable, can satisfy the specification requirement of explosion-proof and outdoor use, the structure of while knob, rapid operation, reset flexibly, in addition, can also bidirectional-movement, can be according to the needs of using, the axle head that stretches out in outside the fixed head at switch shaft is installed contact trigger mechanisms such as cam, operates two electric executive items, increases controlled function.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A cutaway view of Fig. 1.

Label among the figure is respectively: 1-switch cassette holder; The 2-switch shaft; The 3-dial; The 4-torsionspring; 5-torsionspring stop screw; The 6-fixed head.

Embodiment

For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:

See also Fig. 1 and Fig. 2, the automatically reset knob operating mechanism of the on-the-spot switch of electric device for valve, be provided with fixed head 6, switch cassette holder 1 is installed on fixed head, on fixed head and switch cassette holder, have concentric axis hole, be coated with switch shaft 2 in the axis hole, in order to prevent switch shaft front and back play, the centre of switch shaft has concentric circular pillow block at fixed head with cavity place between the switch cassette holder, the rear end of switch shaft stretches out in outside the fixed head, promptly stretch the people in the inner chamber of electric device for valve controller, front end stretches out in outside the switch cassette holder, it is the outside of electric device for valve controller, after being rotated, switch shaft can reset, circular pillow block at switch shaft is set with torsionspring 4, the circular pillow block of the switch shaft side that is positioned in switch cassette holder inboard is fixed with torsionspring stop screw 5, its two of being stuck in torsionspring turn round between the arm, suit between fixed head and circular pillow block on the other axle body of the circular pillow block of switch shaft is fixed with the dial 3 that has crotch, and the crotch of dial also is stuck in two of torsionspring and turns round between the arm.

The utility model is when being applied to switching device, contact trigger mechanisms such as cam can be installed at the axle head in the inner chamber that extend into the electric device for valve controller of switch shaft, at the axle head that stretches out in outside the switch cassette holder knob is installed, realize the controlled function of on-the-spot switching device, its operation principle is: turning knob (positive and negative 30 ° to 45 ° scopes), switch shaft rotates thereupon, at this moment the cam that extend into the axle head installation in the inner chamber of switch shaft will drive the contact trigger mechanism, realize the on-off of circuit, when switch shaft rotates, dial also can rotate and stir torsionspring together, the torsionspring stop screw has limited of torsionspring and has turned round arm, make it to produce the potential energy that the drive switch shaft resets, when unclamping knob, switch shaft just automatically resets under the effect of torsionspring.In addition, the utility model can bidirectional-movement, thereby can operate two electric executive items as required, increases controlled function.

Claims

1. the automatically reset knob operating mechanism of the on-the-spot switch of an electric device for valve, include fixed head, be installed in the switch cassette holder on the fixed head, it is characterized in that: on fixed head and switch cassette holder, have concentric axis hole, be coated with its middle switch shaft that has concentric circular pillow block in the axis hole, the rear end of switch shaft stretches out in outside the fixed head, front end stretches out in outside the switch cassette holder, the cavity place of the circular pillow block of switch shaft between fixed head and switch cassette holder, be set with torsionspring on it, switch cassette holder inboard at other two the torsionspring stop screws of turning round between the arm that are stuck in torsionspring that are fixed with of the circular pillow block of switch shaft, have two dials of turning round between the arm that crotch and crotch also are stuck in torsionspring on the axle body at the cavity place between fixed head and the switch cassette holder, also being fixed with of switch shaft.