CN200999903Y

CN200999903Y - Force moment controller

Info

Publication number: CN200999903Y
Application number: CNU2007200335439U
Authority: CN
Inventors: 焦子靖; 糜建立; 陈季良
Original assignee: POWER STATION AUXILIARY MACHINERY GENERAL PLANT CO Ltd CHANGZHOU
Current assignee: POWER STATION AUXILIARY MACHINERY GENERAL PLANT CO Ltd CHANGZHOU
Priority date: 2007-01-12
Filing date: 2007-01-12
Publication date: 2008-01-02
Anticipated expiration: 2017-01-12

Abstract

A torque controller. The controller comprises a torque pushing rod, a closing direction cam, an opening direction cam, a return spring, an opening direction micro switch, a closing direction micro switch, a valve rod, a valve rod nut, a box body, as well as a gear coaxially connected with the valve rod, a spring installed on the valve rod, a closing direction cam and an opening direction cam coaxially connected with the torque pushing rod; one end of the torque pushing rod is supported on the gear, the opening direction and closing direction micro switches are respectively connected with the supporting frame, and the supporting frame is fixed on the box body; the opening direction cam is electrically connected with the opening direction micro switch, and the closing direction cam is electrically connected with the closing direction micro switch; the both ends of the opening direction cam and the closing direction cam are respectively connected with the opening direction locking nut and the closing direction locking nut; the gear is connected with the output axle of the motor; the structure of the utility model is compact, the adjustment is simple, the utility model is stable and reliable, and has the characteristic of over-torque, and the utility model can effectively protect various adjusting valves. The utility model can be widely used in the fields of electric power, metallurgy, water conservancy and sewage treatment.

Description

Torque controller

Technical field

The utility model relates to a kind of controller of valve actuator, especially relates to a kind of straight journey adjustment type control gear that had moment, various modulating valve are accurately controlled.

Background technique

For the modulating valve of gate valve, stop valve one class, require protective function with moment.When the modulating valve load was excessive, motor power was cut off in the sensitive switch action in this drive unit, thereby protection modulating valve or motor are avoided damaging.Traditional moment control device structure is complicated, open and close often takes place be stuck and be failure to actuate to cam, loses protective function, produces misoperation, even burns motor, less stable.How to develop a kind of simple, reliable and stable torque controller of adjusting, be the target that the technician constantly pursues always.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of straight journey adjustment type torque controller of crossing moment, having good stability.

For solving the problems of the technologies described above, a kind of torque controller of the present utility model, comprise the moment push rod, close, open, open, close to sensitive switch, valve rod, Stem Mut, casing to sensitive switch to cam, Returnning spring to cam, also comprise with the coaxial gear that is connected of valve rod, be contained in spring on the valve rod, with coaxial respectively the opening to cam, pass of being connected of moment push rod to cam.

As a kind of improvement of the present utility model, described moment push rod one end is supported on the gear, described open to, close to sensitive switch respectively with the support Joint, described support is fixed on the casing; Described opening to cam is electrically connected with opening to sensitive switch, and described pass is electrically connected to sensitive switch with closing to cam.

As another kind of improvement the of the present utility model, described pass to an end of cam affixed close to locking nut, open to an end of cam affixed open to locking nut.Described gear and another gear engagement, described another gear is connected with motor output shaft.

The working principle of torque controller of the present utility model is: when valve rod shakes out thrust unlatching or throttle down, its reaction force acts is in Stem Mut, and pass to gear, length of spring compressed makes gear upper and lower mobile, cause the moment push rod to move, the amount of movement of moment push rod just equals the decrement of spring.When valve closing, gear is subjected to reaction force and moves up vertically, and the pushing torque push rod moves upward, the thrust output of the corresponding valve rod of the decrement of spring, make the pass on the control moment push rod touch the pass to the sensitive switch action simultaneously, cut off motor power, valve closing to cam.Otherwise, during Open valve, open to the cam shake-up and open to the sensitive switch action, cut off motor power, split the valve process and carried out force moment protection.

Adopt after the said structure; its open to, close to two cams are coaxial and be connected on the moment push rod; overcome the defective that this two cam often is stuck in the existing torque controller; misoperation no longer takes place; stable and reliable for performance; and the moment adjustment is simple, moment action repeatability height, meets the protection requirement of moment.The utility model compact structure, reliable and stable, volume is little, cost is low.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Fig. 1 is the fundamental diagram of a kind of torque controller of the present utility model.

Fig. 2 is the structural representation of a kind of torque controller of the present utility model.

Fig. 3 is a kind of traditional torque controller structural representation.

Embodiment

From Fig. 1～2 as can be seen, a kind of torque controller of the present utility model, comprise moment push rod 1, close to cam 3, open to cam 4, Returnning spring 8, open to sensitive switch 6, close to sensitive switch 7, valve rod 9, Stem Mut 10, casing 19, its improvement is: also comprise with the valve rod 9 coaxial gears that are connected 11, be contained in spring 12 on the valve rod 9, with moment push rod 1 coaxial opening to cam 4, pass of being connected to cam 3.Described spring 12 selects for use disk spring to be advisable.The decrement of this spring is just in time corresponding with the thrust output of valve rod, by the amount of movement of control moment push rod 1, and the decrement of Regulation spring 12, thereby the thrust output of control valve rod.Before product export, this thrust output promptly is adjusted to its stationary value in advance.Now being reduced to example with throttle down thrust is illustrated: unscrew the pass to locking nut 2, rotate counterclockwise the pass to cam 3 a certain angles, make that the distance between sensitive switch 7 reduces to cam 3 and pass in the pass, thrust also reduces thereupon.

Torque controller of the present utility model, described pass to cam 3, open to cam 4 respectively with 1 coaxial connection of moment push rod, its two ends affixed respectively close to locking nut 2, open to locking nut 5; Described gear 11 and gear 16 engagements, described gear 16 is connected with motor 17 output shafts; Described moment push rod 1 one ends under the effect of Returnning spring 8, be supported on the gear 11, described open to, close to

sensitive switch

6,7 respectively with support 18 Joints, described support 18 is fixed on the casing 19; Described opening to cam 4 is electrically connected with opening to sensitive switch 6, and described pass is electrically connected to sensitive switch 7 with closing to cam 3.When various modulating valve loads such as gate valve or stop valve are excessive; the decrement of the corresponding spring 12 of the reaction force on the valve rod 9; it is the amount of movement of corresponding moment push rod 1; the pass is to sensitive switch 7 actions; cut off the power supply of motor 17; valve closing, thereby protection modulating valve or motor are avoided damaging or burning.Otherwise, during Open valve, open to cam 4 shake-up and open to sensitive switch 6 actions, cut off motor power, split the valve process and carried out force moment protection.

Claims

1, a kind of torque controller, comprise moment push rod (1), close, open, open, close, it is characterized in that to sensitive switch (7), valve rod (9), Stem Mut (10), casing (19) to sensitive switch (6) to cam (4), Returnning spring (8) to cam (3): also comprise with the coaxial gear that is connected of valve rod (9) (11), be contained in spring (12) on the valve rod (9), with coaxial respectively the opening to cam (4), pass of being connected of moment push rod (1) to cam (3).

2, torque controller according to claim 1, it is characterized in that: described moment push rod (1) one end is supported on the gear (11), described open to sensitive switch (6), close to sensitive switch (7) respectively with support (18) Joint, described support (18) is fixed on the casing (19).

3, torque controller according to claim 1 is characterized in that: described opening to cam (4) is electrically connected with opening to sensitive switch (6), and described pass is electrically connected to sensitive switch (7) with closing to cam (3).

4, according to claim 1 or 3 described torque controllers, it is characterized in that: in described pass to an end of cam (3) affixed close to locking nut (2), open to an end of cam (4) affixed open to locking nut (5).

5, torque controller according to claim 1 is characterized in that: described gear (11) and gear (16) engagement, described gear (16) is connected with motor (17) output shaft.