KR102412500B1 - shutdown diaphragm valve - Google Patents

Abstract

In order to improve safety, in the present invention, an inflow path is formed inside the inlet end provided on one side, and a discharge path is formed inside the discharge end provided on the other side, and communicated between the inflow path and the discharge flow path, but the upper side has an opening a valve body in which an open/close flow passage is formed; The lower part is hermetically coupled to the opened upper edge of the opening/closing flow path, and a diaphragm provided on the upper side of the opening/closing flow path is coupled to the lower edge of the opening so that the opening/closing flow path is selectively closed, and a stem insertion hole passes through the inside along the vertical direction. Stem receiving part to be formed; a stem part which is inserted through the stem insertion hole to be lifted, the lower part is disposed opposite to the upper part of the diaphragm, and the upper part is protruded to the upper side of the stem insertion hole; an elastic spring provided along the vertical direction between the outer periphery of the stem portion and the inner periphery of the stem insertion hole, the lower portion being engaged with the stem portion so as to press the stem portion downward; A safety coupling ring part made of a fusible alloy material disposed on the upper part of the stem accommodating part, provided in a solid ring shape, coupled to the upper outer periphery of the stem part protruding above the stem insertion hole, and melted in a liquid phase above a preset temperature. ; And it provides a shutdown diaphragm valve including a detachable handle portion that is selectively hinged to the lower portion of the upper portion of the stem portion so that the stem portion rises and falls in response to the rotational direction.

Description

shutdown diaphragm valve

The present invention relates to a shutdown diaphragm valve, and more particularly, to a shutdown diaphragm valve with improved safety.

In general, a valve is a generic term for devices (in KS B0100 valve terminology) that have a movable mechanism that can open and close a passage to pass, block, or control a fluid. have.

These valves are installed in the middle of a pipeline or in a container to control the flow rate and pressure of the fluid, and control the opening degree of the channel using a spring and a diaphragm installed inside the valve.

In addition, the diaphragm valve controls the pressure in the chamber chamber according to pressure fluctuations without a spring, so that the diaphragm is precisely adjusted, the pressure of the sealing part is distributed, and the external shape change of the diaphragm is prevented, thereby extending the life of the valve. .

Here, the conventional diaphragm valve performs a function of controlling the flow of the fluid flowing in the pipe by the diaphragm coupled to the handle part. In this case, a wear part protruding upward from the inside of the pipe may be formed in the central part of the body part corresponding to the diaphragm.

Accordingly, as the handle portion is rotated in the locked state, the diaphragm is pressed in the downward direction to come into contact with the wear portion, thereby blocking the flow of the fluid. In addition, when the handle part is rotated in the open state, the diaphragm is returned to the upward direction and spaced apart from the wear part so that the fluid flows again.

However, the conventional diaphragm valve is not equipped with a device that automatically and quickly blocks the flow of fluid when a certain temperature is reached in a high-temperature environment due to fire, etc. There was a problem of this deterioration.

Korean Patent Registration No. 10-1708756

In order to solve the above problems, an object of the present invention is to provide a shutdown diaphragm valve with improved safety.

In order to solve the above problems, in the present invention, an inflow passage is formed inside the inlet end provided on one side, and a discharge passage is formed inside the discharge end provided in the other side, and the inflow passage is communicated between the inflow passage and the discharge passage. a valve body in which an opening/closing passage having an upper side is formed; The lower part is hermetically coupled to the opened upper edge of the opening/closing flow path, and a diaphragm provided on the upper side of the opening/closing flow path is coupled to the lower edge of the opening so that the opening/closing flow path is selectively closed, and a stem insertion hole passes through the inside along the vertical direction. Stem receiving part to be formed; a stem part which is inserted through the stem insertion hole to be lifted, the lower part is disposed opposite to the upper part of the diaphragm, and the upper part is protruded to the upper side of the stem insertion hole; an elastic spring provided along the vertical direction between the outer periphery of the stem portion and the inner periphery of the stem insertion hole, the lower portion being engaged with the stem portion so as to press the stem portion downward; A safety coupling ring part made of a fusible alloy material disposed on the upper part of the stem accommodating part, provided in a solid ring shape, coupled to the upper outer periphery of the stem part protruding above the stem insertion hole, and melted in a liquid phase above a preset temperature. ; And it provides a shutdown diaphragm valve including a detachable handle portion that is selectively hinged to the lower portion of the upper portion of the stem portion so that the stem portion rises and falls in response to the rotational direction.

Here, in a state in which the elastic spring is compressed, the inner periphery of the safety coupling ring part is fitted and coupled to the upper outer periphery of the stem part protruding upward of the stem insertion hole, between the inner periphery of the safety coupling ring part and the upper outer periphery of the stem part The coupling force is preferably set to exceed the elastic restoring force of the elastic spring.

In addition, a hinge connection part for raising and lowering the stem part is formed on the upper part of the stem part protruding upward from the stem insertion hole, and the lower one side is the hinge disposed on the upper part of the stem part to rotate around the hinge connection part. It is preferable to include a handle support part that is eccentrically coupled to the connection part.

At this time, the distance between the hinge connection part from one side of the handle support part is the distance between the hinge connection part from one side of the handle support part so that the stem part is pulled upward as the handle support part rotates in the other direction to open the opening/closing flow path by manual operation. It is preferred that the distance between the hinge connection parts is set to be less than the distance between the hinge connection parts, and the lower edge of the other side opposite to the lower one side eccentrically coupled to the hinge connection part is formed in the handle support part in a rounded outer contour.

And, it further comprises a seating coupling portion to be seated on the upper surface of the lower surface of the safety coupling ring portion, the seating coupling portion is provided so that the lower portion has an outer periphery corresponding to the inner periphery of the stem insertion hole is inserted into the upper portion of the stem insertion hole, the lower end portion It is engaged with the upper portion of the elastic spring, a through hole having an inner diameter corresponding to the outer diameter of the stem portion is formed through the center in the radial direction, and the upper portion of the seating coupling portion is extended radially outward along the circumferential direction to accommodate the stem An extension part to be seated on the upper surface of the part is formed, the outer diameter of the extension part is set to be less than the outer diameter of the stem accommodating part so that the molten safety coupling ring part is guided and accommodated, and the lower inner periphery is hermetically coupled to the outer surface of the stem accommodating part, the upper inner It is preferable that the upper end of the stem portion, the seating coupling portion and the safety coupling ring portion are accommodated in a receiving space formed therein and further comprising a cover portion having an inner surface spaced apart from the outer surface of the extension portion.

Through the above solution means, the present invention provides the following effects.

First, when the safety coupling ring part coupled to the upper periphery of the stem part in a solid ring shape melts at a temperature higher than a preset temperature, the coupling with the stem part is released and the diaphragm is pressed down by the elastic restoring force of the elastic spring caught in the stem part. Since the opening and closing flow path is sealed and the flow path is blocked, safety accidents can be prevented and safety of use can be improved.

Second, in a state in which the elastic spring is compressed, the inner periphery of the safety coupling part is fitted to the upper outer periphery of the protruding stem part, and the fitting force between the inner periphery of the safety coupling ring part and the upper outer periphery of the stem part is set to exceed the elastic restoring force of the elastic spring. Since the valve operation below the preset temperature is stably implemented, the operation precision can be remarkably improved.

Third, as the handle support part is eccentrically coupled to the hinge connection part formed on the upper part of the stem part, the stem part goes up and down in response to the rotation direction of the detachable handle part rotated around the hinge connection part. Since the emergency forced opening of the opening/closing flow path is possible through manipulation, the safety of use can be improved.

Fourth, the distance between the hinge connection part on one side of the handle support part is set to be less than the distance between the hinge connection part on the other side part of the handle support part, and the lower edge of the other side of the handle support part is formed in a rounded outer contour. Since the overall size is miniaturized while preventing contact between the handle support part and the seating coupling part, economical efficiency and space utilization can be improved.

1 is a perspective view showing a shutdown diaphragm valve according to an embodiment of the present invention;
2 is a cross-sectional view showing the use of the shut-down diaphragm valve in an open state of the normally open/closed flow path according to an embodiment of the present invention.
3 is a cross-sectional view showing the use of the shut-down diaphragm valve in the closed state of the normally open/closed flow path according to an embodiment of the present invention;
4 is a cross-sectional view showing the state of use of the shut-down diaphragm valve in an emergency opening/closing flow path sealed state according to an embodiment of the present invention;
5 is a cross-sectional view showing the use of the shutdown diaphragm valve in an emergency open state according to an embodiment of the present invention.
6 is a partial cross-sectional view showing a state of use in an open state of an opening/closing flow path in a normal state in a modified example of the shutdown diaphragm valve according to an embodiment of the present invention;
7 is a partial cross-sectional view showing a state of use in a closed state of an emergency opening/closing flow passage in a modified example of the shutdown diaphragm valve according to an embodiment of the present invention.

Hereinafter, a shutdown diaphragm valve according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a shutdown diaphragm valve according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the use state of the shutdown diaphragm valve according to an embodiment of the present invention in the normally open/closed flow path open state, 3 is a cross-sectional view showing the use of the shutdown diaphragm valve in a closed state of the normally open/closed flow path according to an embodiment of the present invention, and FIG. It is an exemplary cross-sectional view showing the use state in the state, and FIG. 5 is a cross-sectional view showing the use state in the emergency open state of the shutdown diaphragm valve according to an embodiment of the present invention.

1 to 5, the shutdown diaphragm valve 100 according to an embodiment of the present invention includes a valve body 10, a stem receiving part 20, a stem part 30, and an elastic spring 40. , including a safety coupling ring portion 50 and a detachable handle portion (60).

Here, the shutdown diaphragm valve 100 may be respectively installed in a plurality of piping facilities for transporting fluids used in process lines in various industrial fields such as mechanical, electrical, and electronic fields, and the flow of the fluid transferred through the pipe It is provided to selectively block.

In addition, the shutdown diaphragm valve 100 may be applied to a ball valve, a diaphragm valve, etc. to selectively block the flow of a fluid, and in this embodiment, the diaphragm valve structure is shown and described as an example.

In detail, in the valve body portion 10, an inflow passage 11a is formed inside the inlet end 11 provided on one side, and a discharge passage 12a is formed inside the discharge end 12 provided on the other side, It is preferable that an opening/closing flow passage 13a communicated between the inflow passage 11a and the discharge passage 12a but having an upper side opened is formed.

Here, the inlet passage 11a and the discharge passage 12a may have curved ends so as to communicate with the opening/closing passage 13a. In addition, the opening/closing flow passage 13a has one lower end communicating with the inlet passage 11a, and the other lower end communicating with the discharge passage 12a. Preferably, the inflow passage 11a and the discharge passage 12a communicate with each other via the opening/closing passage 13a. Through this, the fluid introduced through the inflow passage 11a is discharged to the discharge passage 12a via the opening/closing passage 13a.

At this time, the valve body 10 is preferably formed of a metal material or a synthetic resin material so as to have corrosion resistance to prevent corrosion by a fluid flowing therein and to have durability against external shocks.

In addition, the upper portion of the valve body portion 10 surrounds the side surface of the opening/closing flow passage 13a having the upper side opened, and the coupling protrusion 14 is integrally formed along the circumferential direction for hermetic coupling with the stem receiving portion 20 . An upward extension is preferred.

In addition, at the upper portion of the valve body 10, a pressing protrusion 15 is integrally extended upward along the circumferential direction inside the coupling protrusion 14 in the radial direction so as to press the outer lower portion of the diaphragm 23, which will be described later. desirable. At this time, it is preferable that the upper end of the pressing protrusion 15 is set to be less than the upper end of the engaging protrusion 14 .

And, on the upper portion of the valve body portion 10, the sealing portion 16 is interposed in a ring shape along the circumferential direction on the radially inner side of the pressing protrusion 15 so that the central lower portion of the diaphragm 23 is selectively pressed. It is preferable to be In this case, the sealing part 16 may be disposed in a boundary region between the inflow passage 11a and the opening/closing passage 13a to surround the edge of the end side of the inflow passage 11a.

Here, when the central lower portion of the diaphragm 23 is pressed against the upper end of the sealing part 16, the opening/closing flow path 13a is sealed, so that the inflow flow path 11a and the discharge flow path 12a are mutually blocked. do. On the other hand, when the central lower part of the diaphragm 23 is separated from the upper end of the sealing part 16 and moved upward, the opening/closing flow path 13a is opened, so that the inflow flow path 11a and the discharge flow path 12a are opened. are communicated with each other

On the other hand, the stem accommodating part 20 is preferably sealed by inserting the outer periphery of the lower side into the inner periphery of the coupling protrusion 14 formed on the open upper rim side of the opening/closing passage 13a.

Here, it is preferable that the diaphragm 23 provided on the upper side of the opening and closing passage 13a is coupled to the lower edge of the stem accommodating part 20 so that the opening and closing passage 13a is selectively closed.

And, when the outer periphery of the lower side of the stem accommodating part 20 is hermetically coupled to the inner periphery of the coupling protrusion 14, the outer rim of the diaphragm 23 is the lower end of the stem accommodating part 20 and the pressing protrusion ( 15) is pressed and fixed between them.

At this time, the outer rim of the diaphragm 23 is maintained in a fixed state, and the radial central portion of the diaphragm 23 selectively flows upward and downward in response to whether or not the stem part 30 is pressed downward. desirable.

Here, it is preferable that the diaphragm 23 has a cross-sectional area for sealing the opening/closing flow passage 13a. In addition, the diaphragm 23 is preferably formed of a cobalt alloy such as Elgiloy (Elgiloy) to have corrosion resistance and high modulus of elasticity, and to resist metal fatigue. Of course, since it may be formed of various types of nickel alloys in some cases, the material is not limited, but it is preferably formed of a material having corrosion resistance and high modulus of elasticity.

In addition, it is preferable that the stem receiving portion 20 has a seating protrusion 21 extending radially outward along the circumferential direction on the outer periphery of the lower side opposite to the upper end of the coupling protrusion 14 . At this time, it is preferable that the length between the lower end of the stem receiving part 20 on the lower surface of the seating protrusion 21 is set to correspond to the vertical length of the coupling protrusion 14 .

In addition, it is preferable that the shutdown diaphragm valve 100 includes a hollow bonnet nut part 22 having an upper end engaged with the seating protrusion 21 and having a lower inner periphery fastened to the coupling protrusion 14 .

Here, the bonnet nut part 22 is provided in a hollow shape penetrating in the vertical direction, the upper end is bent radially inward along the circumferential direction, and the extended upper lower surface is the upper surface of the seating protrusion 21 . It can be seated on the hook and coupled.

In addition, threads may be formed on the lower inner periphery of the bonnet nut part 22 and the outer periphery of the coupling protrusion 14 for mutual fastening, and the coupling protrusion ( 14), the valve body 10 and the stem accommodating part 20 may be coupled to each other and fixed.

And, it is preferable that the stem insertion hole 24 is formed through the inside of the stem accommodating part 20 in the vertical direction. At this time, the inner diameter of the stem insertion hole 24 is set to exceed the outer diameter of the stem portion 30, and the stem insertion hole 24 and the stem portion 30 are radially spaced apart along the circumferential direction. This is preferable.

On the other hand, the stem part 30 is inserted through the stem insertion hole 24 so as to be selectively raised and lowered in the vertical direction, the lower part is disposed opposite to the upper part of the diaphragm 23, and the upper part is the stem insertion hole 24 ) is exposed to the upper side and is preferably arranged to protrude. At this time, the stem portion 30 is preferably provided with a vertical length that exceeds the vertical length of the stem receiving portion (20).

And, the lower portion of the stem portion 30 is integrally extended radially outward along the circumferential direction, the lower surface is disposed opposite to the upper surface of the radial central portion of the diaphragm 23, and the outer surface is the stem insertion hole (24) It is preferable that the pressurization expansion part 31 disposed opposite to the lower inner periphery of the is formed.

Here, the diameter of the pressing extension part 31 is set to correspond to the inner diameter of the stem insertion hole 24, and spaced apart from the stem insertion hole 24 at a fine distance so that the pressing extension part 31 is raised and lowered. can be

In addition, the diameter of the pressurization extension part 31 is set to exceed the diameter of the vertical center side of the stem part 30 , and between the pressurization extension part 31 and the vertical direction center side of the stem part 30 . The boundary region may be formed to be stepped. At this time, the lower end of the elastic spring 40 may be seated along the circumferential direction on the upper surface of the radially outer edge of the pressing extension part 31 .

And, the elastic spring 40 is a coil spring surrounding the outer periphery of the stem part 30 between the outer periphery of the stem part 30 and the inner periphery of the stem insertion hole 24, and is provided along the vertical direction, but the lower part is It is preferable to engage the stem portion 30 so as to press the stem portion 30 downward. At this time, preferably, the lower end of the elastic spring may be provided to be seated on the upper surface of the outer edge of the pressurizing extension part 31 to press the stem part 30 downward. Here, the upper end of the elastic spring 40 may be in opposing contact with the lower end of the seating coupling portion 70 to be described later.

Here, it is preferable that the shutdown diaphragm valve 100 further includes the seating coupling part 70 on which the lower surface of the safety coupling ring part 50 is seated on the upper surface. At this time, it is preferable that a through hole having an inner diameter corresponding to the outer diameter of the stem portion 30 is formed in the center of the seat coupling portion 70 in the vertical direction to penetrate in the vertical direction.

In addition, the seating coupling part 70 is provided to have an outer periphery corresponding to the inner periphery of the stem insertion hole 24 at the lower portion, and is inserted into the upper portion of the stem insertion hole 24, the lower end of the elastic spring 40 . It is preferable to include an insertion fixing part 71 that is engaged with the upper part. At this time, the outer periphery of the insertion fixing part 71 may be fitted to the inner periphery of the stem insertion hole 24 .

Here, the inner circumference of the stem insertion hole 24 corresponding to the outer circumference of the insertion fixing part 71 and the inner circumference of the lower side of the stem insertion hole 24 may be formed to be stepped. That is, the inner periphery of the stem insertion hole 24 corresponding to the upper end of the elastic spring 40 may be formed to be stepped. Accordingly, the radially outer side of the upper end of the elastic spring 40 is opposed to the step of the stem insertion hole 24, and the upper end of the elastic spring 40 radially inside is at the lower end of the insertion fixing unit 71. may be in opposing contact.

In addition, it is preferable that an extension portion 72 is formed on the upper portion of the seating coupling portion 70 to be seated on the upper surface of the stem accommodating portion 20 by extending radially outward along the circumferential direction. Here, the outer diameter of the extension portion 72 may be set to be less than the outer diameter of the stem accommodating portion 20 so that the molten safety coupling ring portion 50 is guided and accommodated. In addition, the extension part 72 is in surface contact with the upper surface of the stem accommodating part 20, in some cases, may be screwed to each other by a separate fastening means.

In addition, the upper surface of the extension portion 72 may be formed such that the diameter decreases stepwise toward the upper side. That is, a raised portion extending integrally upward from the inner end of the upper surface of the extension portion 72 may be further formed on the upper portion of the seating coupling portion 70 , and the outer diameter of the raised portion is less than the outer diameter of the extension portion 72 . may be set, and the safety coupling ring portion 50 set to a diameter less than the diameter of the raised portion may be seated on the upper surface of the raised portion.

On the other hand, the shutdown diaphragm valve 100 is hermetically coupled to the lower inner periphery of the outer surface of the stem accommodating part 20 , the upper end of the stem part 30 , the seating coupling part 70 and the safety coupling ring part inside the upper part. It is preferable to further include a cover portion 80 in which the accommodation space 81 in which the 50 is accommodated is formed.

Here, on one side of the outer surface of the stem accommodating part 20, a first screw fastening hole having a screw thread formed therein may be recessed, and the lower outer surface of the cover part 80 corresponds to the first screw fastening hole. A second screw fastening hole having a screw thread formed thereon may be formed on the inner periphery of the position. At this time, as the first screw fastening hole and the second screw fastening hole are screwed in a state in which they are aligned with each other, the cover part 80 may be coupled to the stem accommodating part 20 .

In addition, it is preferable that the inner surface of the cover part 80 is spaced apart from the outer surface of the extension part 72 at a radial distance from each other. At this time, it is preferable that the upper outer edge of the stem accommodating part 20 is exposed to the accommodating space 81 by a space between the outer surface of the extension part 72 and the inner surface of the cover part 80 .

Here, when the safety coupling ring part 50 is melted, which will be described later, the molten safety gull ring part 50 flows between the outer surface of the extension part 72 and the inner surface of the cover part 80 and is collected and collected. It may be hardened when the safety gulling part 50 is re-descent below a preset temperature. At this time, in some cases, the upper surface of the extension part 72 may be formed to be inclined downward toward the radially outward along the circumferential direction to guide the molten safety gulling part 50 .

In addition, the opening 82 may be downwardly recessed in any one of the longitudinal direction and the transverse direction so as to secure a flow space when the detachable handle unit 60 rotates on the upper portion of the cover unit 80 . In this case, the opening 82 may have upper and side openings, and the inside of the opening 82 and the accommodation space 81 may communicate with each other.

On the other hand, the detachable handle part 60 corresponds to the rotational direction so that the stem part 30 is raised and lowered so that the lower surface of the pressurization extension part 31 is selectively downwardly downward the upper surface of the radial central part of the diaphragm 23 . It is preferable that the lower part is selectively hinged to the upper part of the stem part 30 so as to be pressed.

Here, the shutdown diaphragm valve 100 is used in a state in which the detachable handle part 60 is separated, and is detachably coupled to the stem part 30 selectively during valve inspection, inspection and emergency. can be rotated by

In detail, it is preferable that a hinge connection portion 34 is formed on the upper portion of the stem portion 30 protruding upward from the stem insertion hole 24 for raising and lowering the stem portion 30 . At this time, the hinge connection part 34 may be composed of a through hole that is formed through the upper part of the stem part 30 in the longitudinal or transverse direction, and a hinge shaft that is inserted through the through hole, and the hinge shaft is described later. The handle support part 61 may be axially connected to rotate.

In addition, the shutdown diaphragm valve 100 is disposed on the stem part 30 and has a lower one side eccentrically coupled to the hinge connection part 34 so as to rotate around the hinge connection part 34. The handle support part 61 ) is preferably included.

Here, the handle support part 61 is provided with one lower side eccentrically coupled to the hinge connection part 34, and the grip part of the detachable handle part 60 is detachably coupled to the upper part of the handle support part 61 and It may be selectively coupled to the upper portion of the handle support unit 61 so as to be separated. At this time, the eccentric coupling means that a hinge connection area between the handle support part 61 and the hinge connection part 34 is formed at a position spaced apart from the center of the handle support part 61 in the width direction to one side.

And, the stem part 30 as the handle support part 61 rotates in the other direction opposite to one side eccentrically coupled to the hinge connection part 34 in order to forcibly open the opening/closing flow passage 13a by manual operation. ), the distance between the hinge connection part 34 from one side of the handle support part 61 is set to be less than the distance between the hinge connection part 34 from the other side of the handle support part 61 so that it is pulled upward. .

In addition, it is preferable that the handle support part 61 has a round part 61a formed with a rounded outer contour on the other lower edge opposite to the lower one side eccentrically coupled to the hinge connection part 34 .

At this time, it is preferable that the round part 61a is disposed opposite to the upper side of the safety coupling ring part 50 and has a rounded outer contour so that the spaced state from the safety coupling ring part 50 is maintained even during rotation.

On the other hand, the safety coupling ring part 50 is disposed on the upper surface of the stem receiving part 20, preferably on the upper surface of the seating coupling part 70, and is provided in a solid ring shape to the stem insertion hole 24. It is preferable that the inner periphery is coupled to the upper outer periphery of the stem portion 30 protruding upward and formed of a fusible alloy material that melts into a liquid phase above a preset temperature.

Here, the fusible alloy may include a group including at least one of bismuth, lead, tin, cadmium, zinc, indium, thallium, mercury, gallium, and alkali metals. These fusible alloys generally refer to alloys having a melting point of 200° C. or less, and the melting point can be set by a combination of alloys. For example, the preset temperature may be set as 200° C., but is not limited to the above-described example.

And, in the state in which the elastic spring 40 is compressed, the inner periphery of the safety coupling ring part 50 is disposed to protrude upward of the stem insertion hole 24 by frictional force on the upper outer periphery of the stem part 30 . It is preferable to be firmly fitted.

At this time, it is preferable that the fitting force between the inner periphery of the safety coupling ring part 50 and the upper outer periphery of the stem part 30 is set to exceed the elastic restoring force of the elastic spring 40 .

That is, the inner periphery of the safety coupling ring part 50 and the upper outer periphery of the stem part 30 are firmly fitted to each other, so that vertical elevation of the stem part 30 may be restricted. In addition, when the coupling force between the inner periphery of the safety coupling ring part 50 and the upper outer periphery of the stem part 30 according to the melting of the safety coupling ring part 50 is released, the elastic spring 40 in a compressed state is elastically restored. And as the pressure extension part 31 is pressed downward, the stem part 30 is lowered, and as the diaphragm 23 is pressed, the opening/closing flow path 13a may be forcibly closed.

Here, the height of the safety coupling ring part 50 , that is, the vertical thickness, may be set to exceed the maximum spacing between the lower end of the sealing part 16 and the lower surface of the radial central part of the diaphragm 23 .

Hereinafter, a state of use of the shutdown diaphragm valve 100 according to an embodiment of the present invention will be described.

Referring to FIG. 2 , in the normally open/closed flow path of the shutdown diaphragm valve 100 , in the compressed state of the elastic spring 40 , the inner periphery of the safety coupling ring 50 is the stem insertion hole 24 . As the upper outer periphery of the stem portion 30 protrudes upwardly of the .

Here, the pressure of the diaphragm 23 by the pressurization expansion part 31 is released to open the opening/closing flow path 13a, and the inflow flow path 11a and the discharge flow path 12a communicate with each other.

Referring to FIG. 3 , when the user rotates the detachable handle part 60 in the blocking direction to check whether the valve is abnormal in the normally closed state of the opening and closing flow path of the shutdown diaphragm valve 100, the pressure expansion part 31 As a result, the diaphragm 23 is pressed, the opening/closing flow path 13a is sealed, and the inflow path 11a and the discharge path 12a are blocked from each other.

At this time, it is preferable to understand that the user applies an external force for lowering the stem part 30 with a force greater than the fitting force between the inner periphery of the safety coupling ring part 50 and the upper outer periphery of the stem part 30 .

Referring to Figure 4, in the emergency opening and closing flow path of the shutdown diaphragm valve 100 in the closed state, the temperature outside the cover portion 80 due to fire, etc., the cover portion 80, the stem receiving portion 20, As the stem part 30 and the seating coupling part 70 are heated, the safety coupling ring part 50 is heated above the preset temperature by heat conduction, radiant heat or convective heat. In this case, the stem accommodating part 20 , the stem part 30 , the seating coupling part 70 , and the cover part 80 may be made of a metal material having high thermal conductivity.

And, when the safety coupling ring part 50 is melted into a liquid phase as it is heated to a temperature higher than the preset temperature, the inner periphery of the safety coupling ring part 50 and the stem part according to the melting of the safety coupling ring part 50 The coupling between the upper outer periphery of the 30 is released, the elastic spring 40 in a compressed state is elastically restored, and as the pressurized extension part 31 is pressed down, the stem part 30 is lowered, and the diaphragm As the pressure 23 is pressed, the opening/closing flow path 13a is closed, and the inflow flow path 11a and the discharge flow path 12a are blocked from each other.

In addition, the molten safety gulling part 50 is collected by flowing between the outer surface of the extension part 72 and the inner surface of the cover part 80, and the collected safety gulling part 50 is preset. It can be hardened when re-descent below the temperature.

5, in the emergency open state of the shutdown diaphragm valve 100, that is, in the closed state of the opening and closing flow path 13a according to the melting of the safety coupling ring part 50, the emergency of the opening/closing flow path 13a When opening is required, when the user rotates the detachable handle part 60 in an opening direction opposite to the blocking direction, as the handle support part 61 eccentrically coupled to the hinge connection part 34 rotates, the The stem part 30 is raised, the elastic spring 40 is pressed upward, and the pressure of the diaphragm 23 by the pressing extension part 31 is released to open the opening/closing flow path 13a and the inflow. The flow passage 11a and the discharge passage 12a communicate with each other.

Then, the user selectively removes the molten existing safety coupling ring part and inserts the new safety coupling ring part 50 to the upper outer periphery of the stem part 30 that is exposed and protrudes above the stem insertion hole 24, and The handle support part 61 may be rotated back to the state shown in FIG. 2 .

As such, the shutdown diaphragm valve 100 according to an embodiment of the present invention is provided in a solid ring shape so that the safety coupling ring part 50 coupled to the upper outer periphery of the stem part 30 is liquid at a preset temperature or higher. When it is melted, the coupling with the stem part 30 is released. Accordingly, the stem part 30 is pressed downward by the elastic restoring force of the elastic spring 40 caught and coupled to the stem part 30, and the diaphragm 23 and the opening/closing flow path 13a are sealed and flow path. Because the flow is blocked, the safety of use can be significantly improved by preventing secondary safety accidents.

In addition, in a state in which the elastic spring 40 is compressed, the inner periphery of the safety coupling ring part 50 is fitted and coupled to the upper outer periphery of the stem part 30 protruding upward of the stem insertion hole 24, The fitting force between the inner periphery of the safety coupling ring part 50 and the upper outer periphery of the stem part 30 is set to exceed the elastic restoring force of the elastic spring 40, so that the valve operation below a preset temperature is stably implemented. Operational precision can be significantly improved.

And, as the handle support part 61 is eccentrically coupled to the hinge connection part 34 formed on the upper part of the stem part 30 protruding upward of the stem insertion hole 24, the hinge connection part 34 is formed. The stem portion 30 is raised and lowered corresponding to the rotation direction of the detachable handle portion 60 rotated around the center.

Therefore, it is possible to close the opening/closing flow path 13a normally and forcibly opening the opening/closing flow path 13a in an emergency. That is, since the emergency force opening of the opening/closing passage 13a is possible through the manual force operation of the detachable handle unit 60 after the valve is blocked by melting of the safety coupling ring unit 50, use safety can be improved. In other words, unlike the prior art in which it was substantially difficult to restore the opening/closing flow path 13a to be opened once the opening/closing flow path 13a is blocked by melting of the safety coupling ring part 50, the detachable handle part 60 of It is possible to urgently and forcefully open the opening/closing passage 13a through a forced operation.

In addition, the distance between the hinge connection part 34 on one side of the handle support part 61 is set to be less than the distance between the hinge connection part 34 on the other side of the handle support part 61, so that the opening/closing flow path 13a is As the handle support part 61 is rotated in the other direction opposite to one side eccentrically coupled to the hinge connection part 34 in order to be forcibly opened by manual operation, the stem part 30 can be interlocked and towed upward. .

At this time, the lower edge of the other side opposite to the lower one side of the handle support part 61 eccentrically coupled to the hinge connection part 34 is formed in a rounded outer contour, and the handle is rotated for forced opening of the opening/closing flow path 13a in an emergency. Since contact between the support part 61 and the seating coupling part 70 is prevented and the overall size is miniaturized, economical efficiency and space utilization can be improved.

On the other hand, FIG. 6 is a partial cross-sectional view showing a state of use in the normally open/closed flow path open state in a modified example of the shutdown diaphragm valve according to an embodiment of the present invention, and FIG. 7 is a shutdown diaphragm according to an embodiment of the present invention. In a modified example of the valve, it is a partial cross-sectional view showing the state of use in the closed state of the opening/closing flow path in an emergency. In this modified example, the rest of the configuration except for the configuration of the locking groove 33 is the same as the above-described embodiment, so a detailed description will be omitted, and the same configuration will be shown with the same reference numerals.

Here, in the shutdown diaphragm valve 200 according to a modified example of an embodiment of the present invention, a circumferential direction is provided on the upper periphery of the stem portion 30 protruding above the stem insertion hole 24 formed in the stem receiving portion 20 . Accordingly, it is preferable that the locking groove 33 is recessed in the radial direction.

And, in a state in which the elastic spring (40 in FIG. 2) is compressed, the inner periphery of the safety coupling ring part 50 is engaged with the locking groove 33, and the lower surface of the safety coupling ring part 50 has a seating coupling part 70 ) is preferably seated on the upper surface of the

6, in the normally open/closed flow path of the shutdown diaphragm valve 200, in the compressed state of the elastic spring (40 in FIG. 2), the inner periphery of the safety coupling ring part 50 is the engaging groove ( 33), the lifting and lowering of the lifting unit 30 is limited as it is fitted.

Here, the pressurization of the diaphragm (23 in FIG. 2) by the pressurization expansion part (31 in FIG. 2) formed on the lower part of the stem part 30 is released to open the opening/closing flow path (13a in FIG. 2), and the inflow flow path (FIG. 11a of 2) and the discharge passage (12a of FIG. 2) communicate with each other.

Therefore, in the state in which the elastic spring (40 in FIG. 2) is compressed, the inner periphery of the safety coupling ring part 50 is engaged with the locking groove 33, so that the valve operation at a temperature lower than a preset temperature is stably implemented. The precision can be significantly improved.

Referring to FIG. 7 , in the closed state of the emergency opening/closing flow path of the shutdown diaphragm valve 200, the temperature outside the cover part (80 in FIG. 2) due to fire, etc., the cover part (80 in FIG. 2), the stem accommodation As the part (20 in FIG. 2), the stem part (30 in FIG. 2), and the seating coupling part 70 are heated, the safety coupling ring part is heated above the preset temperature by heat conduction, radiant heat or convective heat.

And, when the safety coupling ring part is melted into a liquid phase as it is heated by heating above the preset temperature, the coupling force between the inner periphery of the safety coupling ring part and the locking groove 33 according to the melting of the safety coupling ring part is released, The elastic spring (40 in FIG. 4) in a compressed state is elastically restored, and as the pressure extension part (31 in FIG. 4) is pressed downward, the stem part (30 in FIG. 4) is lowered, and the diaphragm (FIG. 4) 23), the opening/closing flow path (13a in FIG. 4) is closed, and the inflow flow path (11a in FIG. 4) and the discharge flow path (12a in FIG. 4) are blocked from each other by pressurizing.

In this case, terms such as "comprises", "comprises" or "comprises" described above mean that the corresponding components may be inherent unless otherwise stated, so other components are excluded. Rather, it should be construed as being able to include other components further. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be construed as being consistent with the contextual meaning of the related art, and should not be construed in an ideal or excessively formal sense unless explicitly defined in the present invention.

As described above, the present invention is not limited to each of the above-described embodiments, and variations can be implemented by those of ordinary skill in the art to which the present invention pertains without departing from the scope of the claims of the present invention. and such modifications are within the scope of the present invention.

10: valve body part 11: inlet end
11a: inflow passage 12: discharge end
12a: discharge flow path 13a: open/close flow path
20: stem receiving part 23: diaphragm
24: stem insertion hole 30: stem part
34: hinge connection 40: elastic spring
50: safety coupling ring part 60: detachable handle part
70: ligation coupling part 80: cover part
100: shutdown diaphragm valve

Claims (5)

A valve body in which an inflow passage is formed inside the inlet end provided on one side, a discharge passage is formed inside the discharge end provided in the other side, and an opening/closing passage communicating between the inflow passage and the discharge passage but having an upper side is formed. wealth;
The lower part is hermetically coupled to the opened upper edge of the opening/closing flow path, and a diaphragm provided on the upper side of the opening/closing flow path is coupled to the lower edge of the opening so that the opening/closing flow path is selectively closed, and the stem insertion hole passes through the inside along the vertical direction. Stem receiving part to be formed;
a stem part which is inserted through the stem insertion hole to be lifted, the lower part is disposed opposite to the upper part of the diaphragm, and the upper part is disposed to protrude toward the upper side of the stem insertion hole;
an elastic spring provided along the vertical direction between the outer periphery of the stem portion and the inner periphery of the stem insertion hole, the lower portion being engaged with the stem portion so as to press the stem portion downward;
A safety coupling ring part made of a fusible alloy material disposed on the upper part of the stem accommodating part, provided in a solid ring shape, coupled to the upper outer periphery of the stem part protruding above the stem insertion hole, and melted in a liquid phase above a preset temperature. ; and
A shutdown diaphragm valve including a detachable handle part, the lower part of which is selectively hinged to the upper part of the stem part so that the stem part rises and falls in response to the rotational direction. The method of claim 1,
In a state in which the elastic spring is compressed, the inner periphery of the safety coupling ring part is fitted and coupled to the upper outer periphery of the stem part protruding above the stem insertion hole,
A shut-down diaphragm valve, characterized in that the fitting force between the inner periphery of the safety coupling ring part and the upper outer periphery of the stem part is set to exceed the elastic restoring force of the elastic spring. The method of claim 1,
A hinge connection part for raising and lowering the stem part is formed on the upper part of the stem part protruding upward of the stem insertion hole,
and a handle support portion disposed on the stem portion and eccentrically coupled to the hinge connection portion so as to rotate around the hinge connection portion. 4. The method of claim 3,
The distance between the hinge connection part from one side of the handle support part is the distance between the hinge connection part from one side of the handle support part so that the stem part is pulled upward as the handle support part rotates in the other direction to open the opening/closing flow path by manual operation. set to less than the distance between
Shutdown diaphragm valve, characterized in that the handle support portion has a lower rim on the other side opposite to the lower one side eccentrically coupled to the hinge connection portion is formed in a rounded outer contour. The method of claim 1,
A lower surface of the safety coupling ring part further comprising a seating coupling part to be seated on the upper surface,
The seating coupling portion is provided so that the lower portion has an outer circumference corresponding to the inner circumference of the stem insertion hole and is inserted into the upper portion of the stem insertion hole, the lower end portion is engaged with the upper portion of the elastic spring, and corresponding to the outer diameter of the stem portion in the radial center A through hole having an inner diameter of
An extension portion is formed on the upper portion of the seating coupling portion to be radially outwardly extended along the circumferential direction to be seated on the upper surface of the stem receiving portion, and the outer diameter of the expanded portion is the outer diameter of the stem receiving portion so that the molten safety coupling ring portion is guided and accommodated. is set to less than
A lower inner periphery is hermetically coupled to the outer surface of the stem accommodating part, and an accommodating space in which the upper end of the stem part, the seating coupling part and the safety coupling ring part are accommodated is formed inside the upper part, and the inner surface of the cover part is spaced apart from the outer surface of the extension part. Shutdown diaphragm valve further comprising.

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