CN215673839U

CN215673839U - Valve rod actuating mechanism

Info

Publication number: CN215673839U
Application number: CN202122385195.4U
Authority: CN
Inventors: 周建彬; 王云亮
Original assignee: Zhejiang Xingda Automation Technology Co ltd
Current assignee: Zhejiang Xingda Automation Technology Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-01-28
Anticipated expiration: 2031-09-28

Abstract

The utility model discloses a valve rod actuating mechanism, which comprises an actuator, wherein a protruding mechanism is arranged on the part of a shaft body extending out of a shell, the protruding mechanism comprises a protruding block, a switch connected with a control circuit of an actuator motor is arranged on one side of the protruding mechanism, the protruding block in the protruding mechanism touches a contact on the switch to stop the motor in the actuator, the protruding mechanism comprises 2 protruding blocks, the 2 protruding blocks are arranged in a vertical and staggered mode along the axial direction of the shaft body, the switch is arranged on each protruding block moving path, the protruding mechanism is matched with the switch, the protruding mechanism rotates along with the shaft body to a preset position to touch the contact on the switch, then the actuator motor is stopped, a valve core butted with a valve rod is synchronously stopped at the preset position, such as a completely opened state, a completely closed state or other states, the touch type matching is realized, the position of the valve core is more accurately stopped, and the double protruding blocks are matched with double switches at the same time, the valve is beneficial to shortening the stroke of the rotation of the shaft body and the movement of the convex block, and the quick valve is opened or closed.

Description

Valve rod actuating mechanism

Technical Field

The utility model relates to the technical field of valve actuating devices, in particular to a valve rod actuating mechanism.

Background

The electric actuator is a common mechanism in the field of valve control, mostly uses a motor as a power source, regulates speed by a speed change gear set, and abuts against and fixes a valve rod through a shaft body to limit the position of a valve core by mechanisms such as a displacement sensor or a motor limit pin.

In contrast, patent application publication No. CN103791140A discloses an electric valve, in which a protrusion mechanism is mounted on a valve rod, a stroke sensor is mounted at a predetermined position on one side of the valve rod, and the protrusion mechanism contacts with the stroke sensor to stop an actuator motor, so that a valve element stays at the predetermined position, but a single bump is matched with 2 sensors arranged at intervals on a moving track of the single bump in the document, the bump has a long stroke, and the sensor is troublesome to mount and needs to be improved.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one technical defect, the utility model provides the following technical scheme:

the application document discloses valve rod actuating mechanism, including the executor, stretch out from the executor casing with the axis body of valve rod butt joint, the axis body sets up protruding mechanism on the part that the casing stretches out, protruding mechanism includes the lug, and this protruding mechanism one side sets up the switch of being connected with the control circuit of executor motor, and lug touch switch upper contact stops in order to make the executor in protruding mechanism, protruding mechanism includes 2 lugs, and 2 lugs are all set up on each lug removal route from top to bottom, dislocation set at the axial direction of axis body the switch.

With protruding mechanism and switch cooperation, protruding mechanism rotates to predetermined position touch switch upper contact along with the axis body, then makes the executor motor stop, stops in predetermined position in step with the case of valve rod butt joint, if open completely, closed state or other states completely, the touching formula cooperation, the position of case stops more accurately. Meanwhile, the double-lug is matched with the double switch, so that the stroke of rotation of the shaft body and movement of the lug is favorably shortened, and the valve is quickly opened or closed.

Further, the protruding mechanism is a part protruding outward from the circumferential surface of the shaft body, such as a protruding column integrally formed with the shaft body and protruding radially outward from the circumferential surface of the shaft body.

Further, protruding mechanism includes the body, and the body cover is fixed on the axis body to the body cover is fixed on the axis body and is convenient for the assembly shaping, and to the shape of body like cylindric, many prism form etc. or its irregular shape, select as required.

Further, 2 lugs are arranged on the circumferential surface of the body in an up-down mode along the axial direction in a staggered mode, the switches are arranged in an up-down parallel mode, a matching mode of the double lugs and the double switches is adopted in the scheme, the structure is favorable for centralized installation of the switches, the stroke is reduced, if the shaft body rotates forwards, the lugs touch corresponding switch contacts, the motor stops, then the shaft body rotates reversely, and the motor can be stopped when another lug touches corresponding switches.

Furthermore, two switches are fixed on the PCB on one side of the protruding mechanism, and the PCB is connected with a control circuit of the motor of the actuator, so that the switches can be conveniently and intensively mounted, fixed and connected with the control circuit in a butt joint mode.

Further, body head end portion cover is fixed on the tail end of axis body, and the fixed adapter sleeve that docks the valve rod of body tail end, simplifies butt joint structure, conveniently docks fixed valve rod.

Further, the protrusion mechanism is a cam.

Furthermore, the angle between the two convex blocks is 90 degrees, one convex block touches the contact of the corresponding switch, the motor of the actuator stops, and the valve core is in a fully opened state; the other lug touches the contact of the corresponding switch, the motor of the actuator stops, the signaling is in a completely closed state, and the switch mode of most valve cores is met.

Further, the switch is a microswitch.

Furthermore, the actuator comprises a shell, a motor and a speed change gear set, wherein the motor is positioned on the top surface of the shell, an output shaft of the motor is in butt joint with a corresponding gear in the speed change gear set, and an axis body is positioned on the bottom surface of the shell, and the end part of the axis body is in butt joint with the corresponding gear in the speed change gear set.

Compared with the prior art, the utility model has the beneficial effects that:

1. the double-lug and double-switch touch type cooperation is adopted, the valve core is rapidly stopped at the preset position, and the phenomenon of incomplete closing or opening is effectively avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a structural view of the present valve stem actuator in embodiment 1;

FIG. 2 is an exploded view of the actuator;

wherein the reference numerals are:

1. an actuator; 2. a protrusion mechanism; 3. a switch; 4. a PCB board; 5. connecting sleeves; 10. a top cover; 11. a motor; 12. a frame body; 13. a bottom cover; 14. a shaft body; 15. a speed change gear set; 21. a body; 22. a bump; 31. and (4) a contact.

Detailed Description

The utility model is further described with reference to the following figures and specific examples.

Example 1

As shown in fig. 1 and 2, the valve rod actuator includes an actuator, the actuator 1 includes a housing, a motor 11 and a speed change gear set 15, the housing is composed of a frame 12, a top cover 10 and a bottom cover 13, the motor 11 is installed on the top surface of the top cover, the speed change gear set 15 is installed in the cavity of the housing, a gear is sleeved on an output shaft of the motor and is in meshing butt joint with a corresponding gear in the speed change gear set, and a shaft body 14 is located on the bottom surface of the housing and has an end portion in butt joint with the corresponding gear in the speed change gear set.

In this embodiment, the axis body 14 with the valve rod butt joint stretches out from executor bottom 13, axis body 14 installs protruding mechanism 2 from the part that the casing stretches out, choose the cam for use, the cam includes cylindric body 21 and the global axial of body about, dislocation fashioned lug 22, cylindric body 21 directly overlaps the tail end at axis body 14, it is fixed like the bonding, the position installation PCB board 4 of cam one side, the PCB board is about the face of cam, 2 switches 3 of parallel installation, choose micro-gap switch for use, the PCB board is connected with micro-gap switch, its PCB board is connected with the control circuit of executor motor simultaneously, 2 micro-gap switch's contact 31 position is located the removal orbit of lug respectively. As shown in fig. 1, the angle between two projections 22 is 90 °, one projection touches the contact of the corresponding switch, the actuator motor stops, and the valve core is in a fully open state; another lug touches the contact of corresponding switch, and the executor motor stops, and the letter is in the state of totally enclosed, and double switch, the double convex block touching formula cooperation realize that the position of case stops accurately fast for the short stroke, and then the valve realizes opening or closing.

In this embodiment, the head end of the body 21 is fixed to the tail end of the shaft 14, and the tail end of the body is fixed to the connecting sleeve 5 by bonding, so that the connecting sleeve is butted with the fixed valve rod, and the assembly and molding are facilitated.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. Valve rod actuating mechanism, including the executor, the axis body with the valve rod butt joint stretches out from the executor casing, the axis body sets up protruding mechanism from the part that the casing stretches out, protruding mechanism includes the lug, and this protruding mechanism one side sets up the switch of being connected with the control circuit of executor motor, and lug touch switch upper contact stops so that the motor stops in the executor in protruding mechanism, its characterized in that, protruding mechanism includes 2 lugs, and 2 lugs are from top to bottom, dislocation set in the axial direction of axis body, all set up on each lug removal route the switch.

2. The valve stem actuator of claim 1, wherein: the protruding mechanism is a part protruding outwards from the peripheral surface of the shaft body.

3. The valve stem actuator of claim 1, wherein: the protruding mechanism comprises a body, and the body is sleeved and fixed on the shaft body.

4. The valve stem actuator of claim 3, wherein: 2 lugs are arranged on the circumferential surface of the body in a vertical and staggered mode along the axial direction, and the two switches are arranged in parallel up and down.

5. The valve stem actuator of claim 4, wherein: the two switches are fixed on the PCB on one side of the protruding mechanism, and the PCB is connected with a control circuit of the actuator motor.

6. The valve stem actuator of claim 3, wherein: the head end of the body is sleeved on the tail end of the shaft body to be fixed, and the tail end of the body is fixedly connected with the connecting sleeve of the valve rod in a butt joint mode.

7. The valve stem actuator of claim 3, wherein: the protrusion mechanism is a cam.

8. The valve stem actuator of claim 1, wherein: the angle between the two convex blocks is 90 degrees, one convex block touches the contact of the corresponding switch, the motor of the actuator stops, and the valve core is in a fully opened state; the other lug touches the contact of the corresponding switch, the motor of the actuator stops, and the signaling is in a completely closed state.

9. The valve stem actuator of claim 1, wherein: the switch is a microswitch.

10. The valve stem actuator of claim 1, wherein: the actuator comprises a shell, a motor and a speed change gear set, wherein the motor is positioned on the top surface of the shell, an output shaft of the motor is in butt joint with a corresponding gear in the speed change gear set, the shaft body is positioned on the bottom surface of the shell, and the end part of the shaft body is in butt joint with the corresponding gear in the speed change gear set.