KR102250373B1 - Diaphragm Type Actuator for Valve Comprising Mechanical Stopper - Google Patents

Abstract

The present invention provides a diaphragm type actuator for a valve including a mechanical stopper, which comprises: a diaphragm; a stem; a diaphragm case arranged to make the diaphragm liftable and lowerable; a main body having an upper side coupled to the diaphragm case and a lower side coupled to the glove valve; and a stem guide unit disposed at the lower side of the diaphragm case to guide the linear movement of the stem and movably supporting the stem, wherein the stem guide unit is height-adjustable. The diaphragm type actuator for the valve including the stopper according to the present invention can adjust a stroke section of the stem mounted on the diaphragm type actuator for the valve such that the degree of opening and closing of a plug coupled to the stem can be freely adjusted according to a change of an environment in which the valve is used.

Description

Diaphragm type actuator for valve including mechanical stopper {Diaphragm Type Actuator for Valve Comprising Mechanical Stopper}

The present invention relates to a diaphragm actuator for a valve comprising a mechanical stopper, and more particularly, to a diaphragm; Stem; Diaphragm case; And it relates to a diaphragm type actuator for a valve comprising a mechanical stopper including a stem guide portion capable of adjusting the height.

With the advancement of industry, when a small amount is added to lines such as pharmaceutical manufacturing processes and food additives that require hygiene of materials and raw materials, there is a need to overcome limitations in flow rate control.

Ball valves and sanitary butterfly valves, which are widely used in existing sanitary piping lines, can adjust the flow rate within the opening and closing range within 45 degrees, but if the flow rate exceeds 45-90 degrees, the area of the flow path through which the fluid passes increases and is 45 degrees. Since then, it is impossible to control the flow rate, so there is a demand for a sanitary valve that can precisely control the flow rate.

Sanitary valves are sanitary process equipment, which means stainless valves, transport equipment, pipes, etc. used in manufacturing and production facilities in the food, pharmaceutical, and chemical industries, and transport equipment produced according to the standards required by the industry. do.

Valves are devices that open and close a flow path that allows fluid to flow or stop, and are classified into ball valves, butterfly valves, and globe valves according to the opening and closing method.

The food, pharmaceutical, and chemical industries involve a core process of separating, converting, and preventing mixing of liquids such as gas, steam, water, and chemicals that are raw materials for product production. It should be equipped with essential equipment (see FIG. 2 below). In particular, globe valves are capable of fine adjustment, unlike ball and butterfly type valves, and are used most reliably in industries that require fine material input control.

Conventional globe valves basically have a standard cylinder with thrust that facilitates the operation of the valve, a yoke that connects the valve to the cylinder (actuator), a plug that directly opens and closes the transport of materials, and the plug is replaced by the power of the actuator. *?* It is composed of a transmission body (bar column) stem of driving force that moves downward, a seat that supports sealing by contacting with a plug, a conveying passage of materials, and a valve body that protects from external shocks.

Meanwhile, an actuator is a generic term for a prime mover operated by electricity, hydraulic pressure, compressed air, and the like, and generally refers to a device that performs mechanical work using fluid energy. These actuators are largely driven by pneumatics, hydraulics, and electricity, and are mainly used for micro-displacement elements such as electronic pumps and valves that are used in all mechanical devices.

In particular, in the case of an actuator for a valve using pneumatic pressure, a piston and a piston rod that linearly reciprocate by air pressure are used to linearly reciprocate the valve body to open and close the flow path through which the fluid flows, or to raise and lower by air pressure. Using a diaphragm, the valve body is linearly reciprocated to open and close a flow path through which the fluid flows.

However, in the case of a valve equipped with a diaphragm actuator, the shape of the plug used may be different depending on the environment in which the globe valve is used, and the degree of opening and closing of the plug needs to be different, even if the valve is of the same type.

However, in the case of a conventional valve, when the shape of the plug is changed or when the degree of opening and closing of the plug needs to be changed, there is a problem of replacing the plug and the stem itself or replacing the diaphragm actuator itself.

In order to solve the above-described problem, KR Patent Application No. 10-2017-0046808 (name of the invention: diaphragm type actuator for valve) includes a diaphragm; A valve stem supporting a valve body for opening and closing a flow path through which a fluid flows, and linearly reciprocating by the operation of the diaphragm; A diaphragm case in which the diaphragm is provided to be elevated; And a pair of stem guide portions coaxial with the valve stem and disposed opposite to the diaphragm case with the diaphragm interposed therebetween, guiding the linear movement of the valve stem and supporting the valve stem so as to be movable. , The stem guide portion, a guide sleeve for guiding the linear movement of the valve stem; And a guide bushing provided between the guide sleeve and the valve stem and movably supporting the valve stem.

However, even in the case of the above-described patent document, there is still a problem in that the plug itself and/or the stem must be replaced when it is necessary to adjust the degree of opening and closing of the plug.

Throughout this specification, a number of papers and patent documents are referenced and citations are indicated. The disclosure contents of the cited papers and patent documents are incorporated by reference in this specification as a whole, and the level of the technical field to which the present invention belongs and the contents of the present invention are more clearly described.

The inventors of the present invention developed a diaphragm actuator for a valve that can freely control the degree of opening and closing of a plug coupled to the stem according to changes in the environment in which the valve is used by adjusting the stroke section of the stem mounted on the valve diaphragm actuator. To do so, I tried hard research. As a result, the diaphragm; Stem; Diaphragm case; And when manufacturing a diaphragm-type actuator for a valve including a stem guide portion capable of height adjustment, it was found that the degree of opening and closing of the plug can be controlled by freely adjusting the stroke section of the stem according to changes in the environment in which the valve is used. Completed.

Accordingly, an object of the present invention is to provide a diaphragm actuator for a valve including a mechanical stopper.

Other objects and advantages of the present invention will become more apparent by the following detailed description, claims and drawings.

The present invention provides a diaphragm type actuator.

The inventors of the present invention developed a diaphragm actuator for a valve that can freely control the degree of opening and closing of a plug coupled to the stem according to changes in the environment in which the valve is used by adjusting the stroke section of the stem mounted on the valve diaphragm actuator. To do so, I tried hard research. As a result, the diaphragm; Stem; Diaphragm case; And it was confirmed that when a diaphragm actuator for a valve including a stem guide portion capable of adjusting the height is manufactured, the degree of opening and closing of the plug can be adjusted by freely adjusting the stroke section of the stem according to changes in the environment in which the valve is used.

According to an aspect of the present invention, the present invention provides a diaphragm; Stem; A diaphragm case in which the diaphragm is provided to be elevated; A main body having an upper side coupled to the diaphragm case and a lower side coupled to the glove valve; And a stem guide part disposed below the diaphragm case to guide the linear movement of the stem and support the stem so as to be movable, and the stem guide part includes a mechanical stopper capable of adjusting a height. Provides a type actuator.

The term “stopper” used herein may mean an integrated means capable of fixing the stem guide.

The term “clamp” used herein may mean an integral tool or mechanism for interconnecting, coupling, or fastening a plurality of objects.

The term “sliding” as used herein may mean a phenomenon in which a specific object slides and moves in contact with another object.

The term “valve seat” used herein may mean a through hole through which a means for adjusting the flow rate of the fluid is combined to adjust the flow rate of the fluid.

The term "sanitary flow control globe valve" used herein may mean a globe valve obtained by buffing the valve surface for use in the food, pharmaceutical, or chemical industries among globe valves.

According to a preferred aspect of the present invention, the stem of the present invention is preferably combined with a diaphragm support plate located inside the diaphragm case to pass through the stem guide portion, and a valve stem connected to the valve.

According to a preferred aspect of the invention, the actuator stem and the valve stem of the invention can preferably be connected by means of a clamp.

According to a preferred aspect of the present invention, the stem guide part of the present invention is preferably an upper part coupled to a lower side of the diaphragm case and a lower part that guides the linear movement of the actuator stem and supports the actuator stem in a movable manner. Can be configured.

According to a preferred aspect of the present invention, the lower part and the upper part of the present invention may be preferably screwed to adjust the height of the stem guide part.

According to a preferred aspect of the present invention, the upper part of the present invention is preferably a case coupling part on an outer circumferential surface, a first stem guide part on an inner circumferential surface, and an upper configuration extending on the lower side of the upper configuration and coupling the lower part to the inner circumferential surface. It may be composed of a lower configuration in which the upper part thread is formed for.

According to a preferred embodiment of the present invention, the lower part of the present invention is preferably formed on an outer circumferential surface with a lower part threaded lower part threaded for coupling with the upper part thread, and a second stem guide extending on the lower side of the upper part and formed on the inner circumferential surface. It may be composed of an additional formed lower portion.

According to a preferred aspect of the present invention, the height of the present invention may be to adjust the height of the stem guide by turning the lower part clockwise or counterclockwise.

According to a preferred aspect of the present invention, the main body of the present invention may preferably include a stopper for fixing the stem guide.

According to a preferred aspect of the present invention, the outer peripheral surface of the lower portion of the present invention may be formed or combined with a stopper coupling portion for fixing the stopper.

The features and advantages of the present invention are summarized as follows:

(a) The present invention is a diaphragm; Stem; A diaphragm case in which the diaphragm is provided to be elevated; A main body having an upper side coupled to the diaphragm case and a lower side coupled to the glove valve; And a stem guide part disposed below the diaphragm case to guide the linear movement of the stem and support the stem so as to be movable, and the stem guide part includes a mechanical stopper capable of adjusting a height. Provides a type actuator.

(b) The valve diaphragm-type actuator including the stopper of the present invention can freely control the degree of opening and closing of the plug combined with the stem according to changes in the environment in which the valve is used by adjusting the stroke section of the stem mounted on the valve diaphragm-type actuator. Provides an advantage to be able to.

1 shows a conventional diaphragm actuator for a valve.
2 is a cross-sectional view of a diaphragm actuator for a valve including a mechanical stopper according to the present invention.
3 is a cross-sectional view of a stem guide part included in a diaphragm actuator for a valve including a mechanical stopper according to the present invention.

In the present invention, various transformations may be applied and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all conversions, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the present invention, when it is determined that a detailed description of a related known technology may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to the description, the main configuration of a valve to which the diaphragm actuator 100 for a valve according to an embodiment of the present invention is applied will be briefly described.

The valve includes a valve body that forms a flow path of a pipe through which a fluid flows, and a plug that opens and closes the flow path of the valve body.

1 is a view of a conventional valve diaphragm actuator, and FIG. 2 is a cross-sectional view of a valve diaphragm actuator 100 according to an embodiment of the present invention.

2, a diaphragm actuator 100 for a valve according to an embodiment of the present invention is a stem composed of a diaphragm 101, an actuator stem 111, a valve stem 102, and a clamp 113, The diaphragm case 121, the main body 130, the upper part 141 composed of the upper part 141a and the lower part 141b, the lower part 142 composed of the upper part 142a and the lower part 142b. It includes a stem guide portion 140, an elastic member 151 and a diaphragm support plate 161 including.

The diaphragm 101 has a sheet shape made of an elastic rubber material. The diaphragm 101 is provided in the diaphragm case 121 to be elevating.

The stem is composed of an actuator stem 111, a valve stem 102 and a clamp 113. The stem has a rod shape, and has a structure that is detachably coupled to two of the actuator stem 111 and the valve stem 102. In this embodiment, the stem is divided into two, but the structure is not limited thereto, and the stem may be formed of a single rod having a predetermined length.

A plug is supported at one end of the stem located on the valve body. Further, on the stem accommodated in the diaphragm case 121 to be described later, the diaphragm 101 is disposed perpendicular to the axis of the stem.

The actuator stem 111 is coupled to the diaphragm 101 and serves to transmit the kinetic force generated by the diaphragm.

The valve stem 102 is connected by a clamp 113 to be described later, and a plug is formed or coupled at one end.

The clamp 113 connects the actuator stem 111 and the valve stem 102, and the clamp 113 contacts the stem guide unit 140, thereby determining the type setting section of the stem. do.

The stem is linearly reciprocated by the operation of the diaphragm 101. As the stem moves linearly with a certain stroke, for example, the plug reciprocates between the top dead center that completely opens the flow path and the bottom dead center that completely closes the flow path, so that the fluid flows through the valve can be controlled. do.

The diaphragm case 121 has a closed hollow cylindrical shape. The diaphragm case 121 has a structure that can be separated into upper and lower portions, and includes a lower diaphragm case forming a lower region of the diaphragm case 121 and an upper diaphragm case forming an upper region. .

In the diaphragm case 121, the diaphragm 101 is provided to be elevating along the axis of the stem.

The diaphragm 101 is disposed between the lower diaphragm case and the upper diaphragm case. An air chamber for operating the diaphragm 101 is formed in the lower diaphragm case by the diaphragm 101 through the drawing in and out of air. In addition, an elastic member accommodating chamber is formed in the upper diaphragm case in which a plurality of elastic members 151 providing elastic force to the diaphragm 101 are accommodated.

In the lower diaphragm case, a port through which air is drawn in and out of the air chamber is provided, and the port is connected to a pipe (not shown). As air is drawn in and out through the port of the lower diaphragm case, the diaphragm 101 is moved up and down.

Meanwhile, the lower diaphragm case and the upper diaphragm case support the edge of the diaphragm 101 and maintain airtightness between the lower diaphragm case and the upper diaphragm case by fastening means (not shown) such as bolts. And are combined with each other.

The main body 130 serves to connect the diaphragm 101 and the valve body, and typically has an exoskeleton structure in which the stem is exposed, but is not limited thereto.

The stem guide part 140 includes an upper part 141 composed of an upper part 141a and a lower part 141b, and a lower part 142 composed of an upper part 142a and a lower part 142b. The lower part 142 and the upper part 141 are screwed to adjust the height of the stem guide part 140.

The stem guide part guides the linear movement of the upper part 141 coupled to the lower side of the diaphragm case 121 and the actuator stem 111, and a lower part 142 supporting the actuator stem 111 to be movable. It consists of

The upper part 141 is composed of an upper configuration 141a and a lower configuration 141b. The upper configuration 141a and the lower configuration 141b are integrally formed in a hollow hollow pipe shape, and are divided according to the diameter and role of the inner circumferential surface.

A case coupling portion 141a-2 is formed on the outer circumferential surface of the upper configuration 141a, and a first stem guide portion 141a-1 is formed on the inner circumferential surface. The upper part thread 141b-1 for coupling the lower part is formed on the inner circumferential surface of the lower part 141b extending below the upper part 141a.

Here, the diameter of the inner circumferential surface of the upper configuration 141a is smaller than the diameter of the inner circumferential surface of the lower configuration 141b.

The lower part 142 is composed of an upper part 142a and a lower part 142b. The upper part 142a and the lower part 142b are integrally formed in the shape of a hollow hollow pipe, and are divided according to the diameter and role of the inner circumferential surface.

A lower part thread 142a-1 for coupling with the upper part thread is formed on the outer circumferential surface of the upper part 142a, and a second stem guide part ( 142b-1) is formed.

Here, the diameter of the inner circumferential surface of the upper part 142a is larger than the diameter of the inner circumferential surface of the lower part 142b.

In addition, the diameter of the inner circumferential surface of the upper configuration 141a and the diameter of the inner circumferential surface of the lower portion 142b are the same. This is because both configurations serve as stem supports.

Thereby, the stem is movably restrained and supported by the first stem guide part, and the free end thereof is restrained and supported to be movably restrained by the second stem guide part. For example, the stem is movably restrained and supported by a pair of stem guide parts. Supported by two points, the stem does not shake, maintains straightness, and performs linear reciprocating motion, and also prevents the fluid flowing through the pipe passage from leaking through the stem, reduces the occurrence of failure, and extends the life of the valve. do.

The height of the stem guide part 140 may be adjusted by rotating the lower part 142 in a clockwise or counterclockwise direction.

The main body 130 includes a stopper 150 fixing the stem guide part 140.

A stopper coupling portion 143 for fixing a stopper is formed or coupled to an outer circumferential surface of the lower portion 142b.

The lower part 142 is rotated in a clockwise or counterclockwise direction to adjust the height of the stem guide part 140, and then the stopper 150 is coupled to the stopper coupling part 143 to make the shape of the stem. Decide.

Diaphragm actuator for valve 100 Diaphragm 101
Actuator stem 111 Valve stem 102
Clamp 113 Diaphragm case 121
Main unit 130 Stem guide 140
Upper part 141 Upper part 141a
Lower part 141b Lower part 142
Upper part 142a Lower part 142b
Stopper joint 143 Stopper 150
Elastic member 151 Diaphragm support plate 161
First stem guide part 141a-1 Case coupling part 141a-2
Upper part thread 141b-1 Lower part thread 142a-1
2nd stem guide part 142b-1

Claims (10)

Diaphragm;
A diaphragm case in which the diaphragm is provided to be elevated;
A main body having an upper side coupled to the diaphragm case and a lower side coupled to the glove valve;
A stem provided in the main body including an actuator stem connected to the diaphragm support plate located inside the diaphragm case and a valve stem connected to the valve; And
It is disposed under the diaphragm case, the actuator stem penetrates up and down, guides the linear movement of the actuator stem, and includes a stem guide portion supporting the stem so as to move up and down,
The stem guide part
An upper part coupled to a lower side of the diaphragm case; And
A lower part connected to the upper part, guiding the vertical linear movement of the actuator stem, and limiting a downward flow range of the actuator stem; and
The lower part and the upper part are screw-coupled to each other so that the vertical flow width of the actuator stem can be selectively adjusted,
A stopper fixing the height of the lower part; further comprising
Diaphragm actuator for valves with mechanical stopper. delete The method of claim 1,
The actuator stem and the valve stem are diaphragm type actuators for valves comprising a mechanical stopper, characterized in that connected by a clamp. delete delete The method of claim 1,
The upper part is characterized in that consisting of an upper configuration in which a case coupling part is formed on an outer circumferential surface, a first stem guide part is formed on an inner circumferential surface, and a lower configuration in which an upper part thread is formed for coupling the lower part to the inner circumferential surface. Diaphragm actuator for valves with stopper. The method of claim 6,
The lower part is a valve including a stopper, characterized in that the upper part is formed with a lower part thread for coupling with the upper part thread on an outer circumferential surface, and a lower part which is extended on the lower side of the upper part and a second stem guide part is formed on the inner circumferential surface Diaphragm actuator for use.
delete delete The method of claim 7,
A diaphragm actuator for a valve including a stopper, characterized in that a stopper coupling portion for fixing the stopper is formed or coupled to an outer peripheral surface of the lower portion.

Images