KR102602257B1 - Actuator for valve opening and closing - Google Patents

Abstract

The present invention relates to an actuator for opening and closing a valve. In normal times, the valve is normally opened and closed by a motor, and when necessary, the valve can be opened and closed manually regardless of whether the motor is operating. At the same time, in the event of an emergency such as a power outage, the valve can be opened and closed in a set manner. This relates to an actuator for opening and closing a valve that can automatically operate in an open or closed state to prevent safety accidents that may occur due to automatic/manual opening/closing of the valve and stopping the valve during operation in an emergency situation.

Description

Actuator for valve opening and closing {ACTUATOR FOR VALVE OPENING AND CLOSING}

The present invention relates to an actuator for opening and closing a valve. In normal times, the valve is normally opened and closed by a motor, and when necessary, the valve can be opened and closed manually regardless of whether the motor is operating. At the same time, in the event of an emergency such as a power outage, the valve can be opened and closed in a set manner. This relates to an actuator for opening and closing a valve that can automatically operate in an open or closed state to prevent safety accidents that may occur due to automatic/manual opening/closing of the valve and stopping the valve during operation in an emergency situation.

As the industrial structure is gradually becoming more advanced, the existing individual manned management system is developing into an integrated and unmanned integrated operating system across all industrial fields. As a result, an efficient integrated operating system is being established, especially In the valve-related field that controls the flow of fluid, automatic valves and various automatic flow control devices that enable efficient remote control are rapidly becoming popular.

The electric actuator used in this automatic flow control device is an essential driving device for automating valves and control dampers, and is composed of a control unit, ancillary gear devices, motors, etc.

In such a conventional electric actuator, when the power that drives the motor is cut off due to a power outage or the like during the opening or closing operation of the valve, the operating means including the motor are simultaneously stopped, and the valve is in a stopped state during the opening or closing operation.

In this case, if the valve's operation is stopped for a long time, damage to the stopped valve or pipeline through which fluid flows during operation (or after operation is completed), fluid leakage due to failure of various parts of the actuator, equipment destruction, etc. There is a risk of a safety accident occurring.

Therefore, most electric actuators are further equipped with a manual handle that can manually open and close the valve to manually operate the valve in emergency situations to prevent safety accidents.

As a prior art regarding an electric actuator equipped with a manual handle as described above, there is Korean Patent Publication No. 10-2008-0100887 (November 21, 2008) “Actuator Emergency Driving Device” (hereinafter referred to as Prior Art 1).

The prior art 1 is an emergency actuation device for an actuator that can quickly respond to accidents caused by leakage of gas or oil by manually operating the actuator to operate the pipe pipe valve even in the event of a power outage.

The prior art 1 is a method of binding or unbinding a third rotation shaft with a fixed rotation handle and other gears and rotation shafts so that they rotate integrally for manual operation of a valve that operates in conjunction with a plurality of rotating bodies, rotating shafts, and gears. It includes means of binding.

Accordingly, in the prior art 1, when an emergency situation such as a power outage occurs and the actuator does not operate, the worker uses the third rotation shaft on which the rotation handle is fixed through the binding means and other gears and rotation shafts directly linked to valve operation. After binding, the valve can be operated manually by rotating the rotary handle forward or backward.

However, since the above prior art 1 requires the operator to manually operate the valve, there is a high risk of it spreading to a safety accident if a quick response is not made in the event of an emergency. Depending on the size of the valve, the structure of the actuator, etc., the operator can easily operate the valve manually. Since there are many cases where the valve cannot be operated, its limitations as a safety device for electric actuators are clear.

Therefore, the need for a safety device that automatically opens and closes the valve as soon as an emergency situation occurs, even when the power is cut off, has emerged.

As a prior art to solve the above problems, there is Korean Patent Publication No. 10-2004-0018063 (2004.03.02.) “Emergency Actuator for Electromagnetic Valve” (hereinafter referred to as Prior Art 2).

In the prior art 2, when the power of the power supply is suddenly cut off, a rechargeable battery to activate the microcontroller that operates the actuator immediately supplies emergency power to replace the emergency power, preventing emergency situations that may occur due to power cut of the power supply. This relates to an emergency actuator for electromagnetic valves that can prevent losses in advance.

For this purpose, the prior art 2 is either a full-open state/full-closed state in which emergency power is supplied when the power is cut off and the valve body is opened or closed entirely, and a fail-stop state in which the power part is maintained in the state before the power supply was cut off. By allowing the state to be set in advance using the fail mode switch in the memory of the microcontroller, it is possible to flexibly deal with situations caused by a malfunction of the power supply unit, and the emergency contact point is activated at the moment the power supply unit is cut off and the power from the rechargeable battery is replaced. This operates to provide a signal of an emergency situation to the central control panel.

However, in the prior art 2, the valve is controlled electrically using a rechargeable battery, so in emergency situations such as loss of function of the rechargeable battery due to long-term use, electronic defect of the actuator, or power cut due to fire in the actuator itself, Since proper valve control cannot be achieved, the prior art 2 also has a limitation in that it cannot function completely as a safety device for the actuator for valve operation.

Accordingly, a safety device is needed through mechanical structural design that automatically opens or closes the valve no matter what emergency situation occurs.

Accordingly, the present invention was devised to solve the problems described above.

The present invention relates to an actuator for opening and closing a valve. In normal times, the valve is normally opened and closed by a motor, and when necessary, the valve can be opened and closed manually regardless of whether the motor is operating. At the same time, in the event of an emergency such as a power outage, the valve can be opened and closed in a set manner. The purpose is to provide an actuator for opening and closing a valve that can automatically operate in an open or closed state to prevent safety accidents that may occur due to automatic/manual opening and closing of the valve and stopping the valve during operation in emergency situations.

In order to achieve the above object, the actuator for opening and closing the valve according to the present invention,

A drive shaft that opens and closes the valve through two-way rotation;

A first compound planetary gear reducer that rotates the drive shaft in both directions;

A motor connected to one side of the first compound planetary gear reducer;

A second compound planetary gear reducer connected to a manual handle and connected to the other side of the first compound planetary gear reducer;

Including an emergency control unit connected to the second compound planetary gear reducer and provided with an elastic body in which energy is accumulated to rotate the second compound planetary gear reducer in one direction,

In normal times, automatic opening and closing of the valve through the motor or manual opening and closing of the valve through the manual handle is possible,

In an emergency situation of power outage, the valve is opened or closed by the elastic body.

And in the actuator for opening and closing the valve according to the present invention,

The driving shaft is a worm gear, and the driven shaft connected to the valve is a worm wheel meshed with the worm gear.

In addition, in the actuator for opening and closing the valve according to the present invention,

The elastic body is characterized in that it is composed of a spring spring.

The actuator for opening and closing the valve according to the present invention,

Normally, the valve is opened and closed by a motor, and when necessary, the valve can be opened and closed arbitrarily with a manual handle. When an emergency situation such as a power outage occurs, the valve is automatically operated in the set open or closed state to prevent the occurrence of safety accidents. To prevent,

In particular, through the double composite planetary gear reducer, each operation by the motor, manual handle, and emergency control unit is performed individually without interfering with other operations, so the input power is transmitted independently of each other, resulting in excellent operational stability, and through a special planetary gear, 2 Input can be transmitted to more than one main shaft,

Mechanical emergency recovery not only enables immediate response to any emergency situation, but also has the advantage of miniaturization and weight reduction compared to conventional actuators, and has the effect of reducing manufacturing costs.

1 is a cross-sectional view schematically showing the internal structure of an actuator according to the present invention.
Figure 2 is a conceptual diagram showing a normal operating state by a motor.
Figure 3 is a conceptual diagram showing a manual operation state using a manual handle.
Figure 4 is a conceptual diagram showing an emergency operation state through an emergency control unit.

Since the present invention can be subject to various changes and can have various forms, implementation examples (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

In each drawing, the same reference signs, especially the tens and ones digits, or the same tens, one's, and alphabets, indicate members having the same or similar functions, and unless otherwise specified, each of the drawings The member indicated by the reference sign can be understood as a member that complies with these standards.

In addition, in each drawing, the components are expressed exaggeratedly large (or thick), small (or thin), or simplified in size or thickness in consideration of convenience of understanding, etc., but as a result, the scope of protection of the present invention is interpreted as limited. It shouldn't be.

The terms used in this specification are merely used to describe specific implementation examples (sun, aspect, aspect) (or examples), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as ~include~ or ~consist of~ are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

~First~, ~Second~, etc. described in this specification are only used to distinguish different components, and are not limited by the order of manufacture, and the names are used in the detailed description and claims of the invention. may not match.

For convenience in explaining the actuator for opening and closing the valve according to the present invention, if an approximate direction standard that is not strict is specified with reference to FIG. 1, the direction in which gravity acts is set to the bottom, and the up, down, left, and right are determined as shown, and as shown in other drawings. In the detailed description and claims of the invention, the direction is specified and described according to this standard, unless otherwise specified.

Hereinafter, the actuator for opening and closing the valve according to the present invention will be described with reference to the attached drawings.

As shown in Figure 1, the actuator for opening and closing the valve according to the present invention,

A drive shaft (D) that opens and closes the valve through two-way rotation;

A first compound planetary gear reducer (10) that rotates the drive shaft (D) in both directions;

A motor (M) connected to one side of the first compound planetary gear reducer (10);

A second compound planetary gear reducer (20) connected to a manual handle and connected to the other side of the first compound planetary gear reducer (10);

Including an emergency control unit connected to the second compound planetary gear reducer (20) and provided with an elastic body in which energy is accumulated to rotate the second compound planetary gear reducer (20) in one direction.

In normal times, automatic opening and closing of the valve through the motor (M) or manual opening and closing of the valve through the manual handle is possible,

In an emergency situation of power outage, the valve is opened or closed by the spring spring 30.

The drive shaft (D) rotates to open and close a valve (not shown), and the drive shaft (D) is composed of a worm gear, and a whim wheel to which the valve is connected is provided as a driven shaft (P), so that the drive shaft (D) The valve is opened and closed by rotation.

The first compound planetary gear reducer (10) is a special planetary gear system that reduces and transmits the power transmitted from the motor (M), and is a special planetary gear system that combines ring gears and planetary gears, and the second compound planetary gear reducer (10) is a special planetary gear system that combines ring gears and planetary gears. When manual power is transmitted from the gear reducer 20, there is no interference with the motor (M).

Specifically, the first compound planetary gear reducer (10) is installed on a sun gear (11) that receives power from the motor (M), a carrier (12) rotated by the sun gear (11), and the carrier (12). It includes a planetary gear 13 that reduces power through rotation, a ring gear 14 that rotates the planetary gear 13 itself, and an output gear 15 that transmits the reduced power to the drive shaft (D).

Reference numerals not shown indicate bearings that roll and support the output gear 15.

The configuration of the first compound planetary gear reducer (10) is equally applied to the second compound planetary gear reducer (20).

The motor (M) is an electric motor capable of rotating in both directions, and the rotation shaft and the sun gear (11) of the first compound planetary gear reducer (10) are connected to the spur gear (1) to provide primary reduction of the power of the motor (M). and transmits it to the first compound planetary gear reducer (10).

The second compound planetary gear reducer (20) receives power from a manual handle (not shown) connected to the sun gear (21) and transmits it to the first compound planetary gear reducer (10),
Specifically, the motor (M), the first compound planetary gear 10, and the second compound planetary gear 20 are arranged in parallel,
The rotation shaft of the motor (M) and the sun gear of the first compound planetary gear (10) are meshed and connected with a spur gear (1),
The ring gears of the first compound planetary gear reducer 10 and the second compound planetary gear reducer 20 are meshed and connected in the form of spur gears.

The emergency control unit uses energy stored in the elastic body to provide rotational power to the second compound planetary gear reducer (20).

Specifically, the elastic body is composed of a mainspring spring 30, and in a state where the mainspring spring 30 is wound in one direction and energy is accumulated, when the power supplied is cut off due to a power outage, etc., the clutch 31 (solenoid) is immediately activated. By releasing the locking of the spring fixing pin, the accumulated energy of the main spring (30) is transmitted to the second compound planetary gear reducer (20).

Hereinafter, the specific operation of the actuator according to the present invention having the above-described configuration will be described.

First, in normal times when power supply is maintained normally, as shown in Figure 2,

As the power generated from the motor (M) passes through the spur gear (1), it is firstly decelerated and transmitted to the first compound planetary gear reducer (10), and the power received from the first compound planetary gear reducer (10) is secondarily reduced. As the drive shaft (D) rotates in both directions, the valve opens and closes automatically.

Also, if it is necessary to manually open and close the valve during normal operation for reasons such as inspection of equipment or replacement of parts, without stopping the motor (M), as shown in Figure 3,

When the operator turns the manual handle, the manual power is transmitted to the second compound planetary gear reducer (20) through the sun gear (21) and is first reduced, and then when transmitted to the first compound planetary gear reducer (10), the power is transmitted to the second compound planetary gear reducer (20). After the speed is increased, the secondary reduced power from the first compound planetary gear reducer 10 is transmitted to the drive shaft (D), so that the opening and closing of the valve can be manually operated.

In addition, if an emergency situation occurs in which the power supply is cut off due to a power outage, etc., the mode is immediately switched to emergency mode when the main power is lost, and as shown in FIG. 4, the clutch 31 that detects this operates to limit the operation of the mainspring spring 30. Unlock the fixing pin, and as soon as the lock is released, the mainspring spring (30) operates, and the accumulated energy is transmitted to the second compound planetary gear reducer (20), and the power of the mainspring spring (30) is transferred to the second compound planetary gear reducer. After being transmitted from (20) to the first compound planetary gear reducer (10), the speed is increased, and then the power is transmitted to the drive shaft (D) in a reduced state from the first compound planetary gear reducer (10), so that the valve is opened or preset. Returns to closed state and stops.

In the above description of the present invention, the actuator for opening and closing the valve has been mainly described with reference to the accompanying drawings. However, the present invention can be modified, changed and replaced in various ways by those skilled in the art, and such modifications, changes and substitutions are within the scope of protection of the present invention. It should be interpreted as belonging to.

D: Drive shaft P: Drive shaft
M: Motor 1: Spur gear
10: 1st compound planetary gear reducer 11: Sun gear
12: Carrier 13: Planetary gear
14: ring gear 15: output gear
16: Bearing 20: Second compound planetary gear reducer
21: Sun gear 30: Elastic body
31: Clutch

Claims (3)

A drive shaft (D) that opens and closes the valve through two-way rotation;
A first compound planetary gear reducer (10) that rotates the drive shaft (D) in both directions;
A motor (M) connected to one side of the first compound planetary gear reducer (10);
A second compound planetary gear reducer (20) connected to a manual handle and connected to the other side of the first compound planetary gear reducer (10);
Including an emergency control unit connected to the second compound planetary gear reducer (20) and provided with an elastic body in which energy is accumulated to rotate the second compound planetary gear reducer (20) in one direction.
In normal times, automatic opening and closing of the valve through the motor (M) or manual opening and closing of the valve through the manual handle is possible,
In an emergency situation of power outage, the valve is opened or closed by the elastic body,
The motor (M), the first compound planetary gear 10, and the second compound planetary gear 20 are arranged in parallel,
The rotation axis of the motor (M) and the sun gear of the first compound planetary gear (10) are meshed and connected with a spur gear (1),
An actuator for opening and closing a valve, characterized in that the ring gears of the first compound planetary gear reducer (10) and the second compound planetary gear reducer (20) are meshed and connected in the form of spur gears.
According to claim 1,
An actuator for opening and closing a valve, characterized in that the driving shaft (D) is a worm gear, and the driven shaft (P) connected to the valve is a worm wheel meshed with the worm gear. The method of claim 1 or 2,
An actuator for opening and closing a valve, characterized in that the elastic body is composed of a spring spring (30).

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