KR101852412B1 - Forced closing check valve - Google Patents

Abstract

The present invention relates to a check valve which is able to forcibly close a duct during an emergency or when needed. According to the present invention, the check valve that is able to forcibly close integrates the function of a swing check valve, which closes a duct by using a back flow, and the function of a normal valve, which artificially closes a valve duct by operating a driving unit on a top end. For a basic operation, the present invention allows the normal flow of a fluid by using the characteristics of a swing check valve, and when a back flow occurs, the present invention maintains a function to automatically lower a swing disk by a fluid flowing backward and to close a duct even without an artificial operation. When necessary, the present invention is able to forcibly lower the swing disk by using a plate-shaped stem connected to a driving unit on a top end and to artificially but completely close a duct or to control the flow rate of the duct. In addition, the present invention is able to, unlike a gate valve which has to lower a gate from the top end of a duct to the bottom end to completely close a duct, properly adjust and place a plate-shaped stem connected to a driving unit in position on the top end in accordance with circumstances, to reduce the full length of the valve and time for opening, and to simultaneously reduce the working torque of the valve. According to the present invention, the check valve comprises an operation unit and a driving unit.

Description

Force closeable check valve {omitted}

The present invention relates to a check valve capable of forcibly closing a conduit in case of emergency or when necessary.

The swing check valve is capable of preventing reverse flow of fluid in the pipeline without artificial operation, and the pipeline is closed by the pressure of the fluid flowing backward, whereby the disk is brought into close contact with the body. However, it can only be used with only echoes, and there is a disadvantage that it is impossible to artificially close the pipeline.

Japanese Patent Application Laid-Open No. 10-2013-0069947 (2013.06.27)

Problems to be solved by the present invention are as follows.

In other words, while maintaining the operating mechanism of the swing check valve that allows normal fluid flow by utilizing the characteristics of the swing check valve during normal operation and automatically closes the swing disk by the fluid flowing backward without artificial operation in case of back flow, If necessary, use a plate-type stem to forcibly push the swing disk to completely close the channel artificially, or to adjust the flow rate through the channel appropriately.

In order to solve the above problems,

An operation part (200) disposed on the pipeline and closed by the pressure of the fluid flowing in the forward direction and closed by the pressure of the fluid flowing in the reverse direction; And a driving part 100 for artificially closing the operating part 200 or adjusting the flow rate when the fluid flows in the forward direction, wherein the operating part 200 is installed on the pipe, and the inflow part 240a The body 240 is formed at the inlet 240a of the body 240 and the upper end is hinged to the body 240 to swing down to close the conduit 240. [ The body 240 is formed such that the lower end 240ab of the body 240 is longer than the upper end 240at of the inlet 240a so that the inlet end 240al is inclined The disk 220 is formed by being inclined at a slope such as a straight line connecting the upper end 240at 'and the lower end 240ab' of the inlet 240a to the body contact portion 223 of the disk 220 when the disk 220 is closed (242), and the disk (220) includes a forward directional member A channel insertion portion 222 having a diameter (R222a, R222b, R222c, R222d) smaller than the disk diameter (R220) on the surface contacting the body and protruding into the elliptic cone structure to correspond to the inclined inlet end (240al) The surface of the disk 220 facing the fluid flowing in the forward direction is a surface except for the channel insertion portion 222 which is in contact with the fluid of the body contact portion 223 and the disk 220, And a detent jaw contact portion 225 formed to contact the detent jaw contact portion 225 with the disc detaching jaw 243 of the body. The driving portion 100 includes a handle 110 for generating a rotational force, A stem 140 that penetrates the stem nut 130; a plate-shaped stem 190 that is coupled to a lower end of the stem 140; And a configuration of the driving part coupled to the inlet part 240a and the discharge part 240b, except for the handle 110, A stem 141 is formed on the outer circumferential surface of one side of the stem 140 and the inner circumferential surface of the stem nut 130 is formed on the outer circumferential surface of the stem 140, And the stem 140 is moved up and down according to the rotation of the stem nut 130. The plate-like stem 190 is provided with a plate 120 perpendicular to the flow direction of the fluid, The lower end face of the plate-shaped stem 190 is a circular disk-shaped contact portion 192 having a curvature at a side end face thereof. When the plate-shaped stem 190 is lowered, the disk contact portion 192 of the plate- When the bonnet 150 is fastened to the body 240, the fastening height 240ah of the inlet 240a is greater than the fastening height 240bh of the outlet 240b So that the axis of the driving part 100 and the axis of the discharge part 240b are inclined so as to form an acute angle &thetas; And is installed,

The pipe insertion portion 222 of the disk 220 is designed to have a smaller diameter R222b and R222d than the diameter R222a and R222c of the portion where the protrusion starts at the disk 220, And an elliptic cone structure in which the vertical diameters R222c and R222d are designed to be longer than the horizontal diameters R222a and R222b of the protrusions is formed so that the channel insertion portion 222 of the elliptic cone structure tilts when the disc 220 is closed And completely closes the channel of the inlet portion 240a,

The lower end of the stem 140 is connected to the upper end of the plate-like stem 190. The upper end of the plate-like stem 190 is connected to the lower end of the plate- And a stem coupling part 191 which is an upper end of the plate-like stem 190 is inserted into a plate-shaped stem coupling part 142, which is a lower end part of the stem 140, present.

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The present invention has the following effects.

A check valve that can be closed forcibly by integrating the function of a swing check valve that closes a channel by using reverse flow in one valve and the function of a general valve that artificially closes a channel of a valve by operating the upper drive portion is realized.

The swing disk is automatically closed down by the backflowing fluid without any artificial operation, while maintaining the function of closing the channel by using the characteristics of the swing check valve in the basic operation, The swing disk is forcibly pushed using a plate-shaped stem connected to the swing disk so that the channel can be completely closed or the flow rate of the channel can be adjusted.

In the present invention, the position of the plate-shaped stem connected to the upper driving part can be appropriately adjusted according to the situation, unlike the gate valve which requires the gate to be pushed from the upper end to the lower end of the channel in order to completely close the channel, Thereby reducing the total length of the valve and the opening / closing time of the valve, as well as reducing the operating torque of the valve.

1 is a perspective view of the entire configuration;
2 is an exploded view of Fig.
3 is a perspective view showing a configuration of an operating portion;
Fig. 4 is an exploded view showing the fastening characteristics of the operating portion and a fastening diagram. Fig.
5 is a perspective view showing a configuration of a driving unit;
6 is a half sectional view showing the engaging characteristics of the driving part and the operating part;
7 is a half sectional view showing the check valve operation in normal operation;
8 is a perspective view illustrating the process of forced closing of an emergency or valve if necessary;
9 is a half sectional view showing a state of forced closing;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the scope of the present invention should be understood from the description of the claims. Further, the description of known technology which obscures the gist of the present invention is omitted.

It should be noted that the directions of "phase" and "bottom" in the description of the present invention are merely directed to the shape of FIG. 1 for the sake of understanding, and directions of the baseline (or drawing)

The check valve of the present invention is composed of a driving part 100 and an operating part 200 as shown in FIG.

The operation part 200 is disposed on the pipeline and is closed by the pressure of the fluid flowing in the forward direction and the fluid flowing in the reverse direction. The operation part 200 includes the disc 220, the disc pin 230, (240).

The body 240 is installed on the pipeline, and the forward fluid flows into the inlet 240a and is discharged to the outlet 240b.

The disk 220 is formed at the end of the inlet 240a of the body, and the upper end of the disk 220 is hinged to the body 240, thereby swinging downward to close the channel or swing up to open the channel. Accordingly, the fluid is swung upward by the forward fluid pressure flowing from the inlet portion 240a, and the conduit is opened. Conversely, when reverse fluid pressure flowing from the discharge portion 240b occurs, the disk 220 is swung back downward, .

As shown in FIG. 4 (a), a protruded channel inserting portion 222 having a diameter (R222a, R222b) smaller than the disc diameter R220 is formed on a surface of the disc 220 facing the forward fluid, Is directly inserted into the channel of the inlet portion 240a when the disk 220 is closed. In addition, the diameter R222b of the portion where the channel insertion portion 222 ends at the portion where the projection starts to protrude from the disk 220 is smaller than the diameter R222a, and the side surface of the projection is inclined. In particular, since the pipe insertion portion 222 is completely inserted into the pipe passage of the valve and the valve is closed, it is possible to maintain sufficient airtightness even without applying a separate sheet. The surface of the disk 220 excluding the channel inserting portion 222 is a body contacting portion 223 which contacts the disk contacting portion 242 of the body when closing the disk 220 to block the channel and maintain the airtightness. do. The lower end portion of the disk 220 is in contact with the backward fluid of the disk 220 and the disk 220 contacts the disk stop jaw 243 of the body 220 when the disk 220 is fully opened, It maintains the position.

The disk pin 230 serves to couple the disk 220 to the body 240 so as to be swingable. The body coupling protrusion 221 formed on the disc 220 and the disc coupling portion 241 formed on the upper end of the insertion portion 240a of the body 240 are coupled by the disc pin 230, 220 will swing.

The body 240 is formed with a disk contact portion 242 which is a portion where the disk 220 contacts the body contact portion 223 of the disk 220 when the disk 220 is closed.

4B, the inflow portion 240a of the body 240 has a lower end 240ab that is longer than the upper end 240at so that the inflow end 240a, which is a boundary portion between the inflow portion 240a and the depression 240c, The disc contact portion 242 is formed by being inclined at a slope such as a straight line connecting the upper end 240at 'and the lower end 240ab' of the inflow portion 240a.

At this time, the diameter of the inlet end 240al corresponds to the root outer diameter R222c of the insertion portion 222 of the disk 220. [ Whereby the disc contact portion 242 is formed obliquely so that the disk 220 is obliquely rolled when closed and the longitudinal outer diameters R222c and R222d of the channel insertion portion 222 are larger than the transverse outer diameters R222a and R222b. an elliptical cone-shaped channel insertion portion 222 is formed. That is, the tube 220 has an elliptical cone-shaped channel insertion port 222 formed to have the same size as the inlet end 240al of the tilted body 240.

When the disc 220 is completely opened, a certain portion protrudes from the upper end of the discharge portion 240b of the body 240 to contact the detent jaw contact portion 225 of the disc 220 to stop the swing of the disc 220, A detent jaw 243 is formed.

5, the driving unit 100 forcibly closes the actuating part 200 when the fluid flows in the forward direction and includes a handle 110, a bearing 120, a stem nut 130, a stem 140, A bonnet 150, a gland 160, a packing 170, a back sheet 180, and a plate-shaped stem 190. More specifically, when the fluid flows in the normal direction by the driving unit 100, the actuating unit 200 can be completely closed or the flow rate can be adjusted.

The handle 110 serves to generate a rotational force. Although a manual control method using a general handle is shown in the drawing, an automatic control method using an actuator such as an electric motor may be applied.

The stem 140 is a cylindrical member that is elongated from the handle 110 to a portion where the plate-like stem 190 is coupled. A thread 141 is formed on one side of the stem 140. Preferably, the outer circumferential surface of the upper half of the stem 140 is formed as a thread 141 as shown.

The stem nut 130 is a cylindrical member that rotates by receiving the rotational force of the handle 110 and is fixedly coupled to the handle 110. The stem nut 140 is screwed on the inner peripheral surface of the stem nut 130, A corresponding screw groove 131 is formed and screwed into the stem 140 passing through the stem nut 130. [

Accordingly, when the handle 110 is rotated, the stem 140 moves up and down according to the rotation of the stem nut 130.

The plate-shaped stem 190 is a plate-shaped member coupled to the lower end of the stem 140 and perpendicular to the flow direction of the fluid. When the plate-shaped stem 190 is lifted to its maximum, The contact portion 192 is configured to abut the disc 220 in a long horizontal direction.

The upper end of the plate-shaped stem 190 is formed with a stem fastening portion 191 having a long horizontal groove on both sides and a lower end portion of the stem 140 is connected to a plate-shaped stem coupling portion 142 are formed so that the stem coupling part 191 and the plate-shaped stem coupling part 142 are fitted together. This structure facilitates assembly at the time of fabrication and facilitates replacement work by abrasion.

The lower end surface of the plate-shaped stem 190 serves as a disk abutting portion 192 and serves to press the disk abutment portion 192 of the disk 220 against the disk 220 when the disk 220 is closed. The disc contact portion 192 has a rounded shape with a curvature as shown in the figure so that the disc contact portion 192 of the plate-shaped stem 190 is simultaneously moved in the rolling contact and the sliding contact with the plate- .

The bonnet 150 is a housing which is coupled between an upper portion of the body 240 and an inlet portion 240a and a discharge portion 240b and accommodates and joins the structure of the driving portion except for the handle 110. The stem 140, And also supports the lifting and lowering motion of the plate-shaped stem 190. More specifically, a stem nut 130 is coupled to the upper end of the bonnet 150. A bearing 120 is formed between the stem nut 130 and the bonnet 150 to allow the stem nut 130 to be separated from the bonnet 150 .

 A plate type stem guide groove 151 corresponding to the shape of the plate type stem 190 is formed in the lower part of the bonnet 150 and the plate type stem 190 moving up and down moves in the plate type stem guide groove 151, .

6, when the bonnet 150 is fastened to the body 240, the fastening height 240ah of the inlet 240a is designed to be higher than the fastening height 240bh of the outlet 240b, 100 and the axis in the direction of the discharge portion 240b are inclined so as to form an acute angle?.

The disk abutment portion 192 of the plate-shaped stem 190 is designed to be positioned near the center of the disk 220 when the plate-shaped stem 190 is lifted to the maximum, so that the lift-off displacement of the plate- , The total length of the valve is reduced, the operation time is shortened, and the operation torque is also reduced.

The glands 160 are coupled at the center of the bonnet 150 and located at the top of the packing 170 to support the packing 170 while supporting the stem 140.

The packing 170 is a sealing member formed on the outer periphery of the bonnet 150 and the stem 140 to maintain the airtightness between the bonnet 150 and the stem 140 by the pressure of the upper ground 160.

The back sheet 180 is installed on the outer periphery of the stem 140 at a position where the plate type stem guide groove 151 of the bonnet 150 ends and is provided to supplement the sealing performance of the packing 170.

The principle of opening and closing of the force-closeable check valve based on the above construction will be described as follows.

7, by moving the stem 140 to the maximum position by operating the screw fastening portions 131 and 141 and positioning the plate-shaped stem 190 at the upper portion of the operation portion 200, the free swing of the disk 220 .

7 (a): When the fluid F1 flowing in the forward direction is applied with the pressure P1 in the normal direction, the disk 220 is lifted while swinging in the direction of the discharge portion 240b, and then the disk stopping jaw 243 ) To stop the swing.

7 (b): When the fluid F2 flowing in the opposite direction applies the pressure P2 in the reverse direction, the raised disk 220 is lowered while swinging in the direction of the inflow portion 240a.

7 (c): The descending disk 220 stops swinging by contacting the disk contacting portion 242 of the body 240 with the body contacting portion 223, and at this time, the channel inserting portion 222 moves the inlet portion 240a ).

As shown in FIG. 8, when the handle 110 is rotated to lower the stem 140, the plate-shaped stem 190 can press the disk 220 to forcefully close the channel.

8 (a): When the handle 110 is rotated (R1) in a state where the stem 140 is maximally raised, the stem 140 is lowered by the operation of the screw fastening portions 131 and 141, The stem of the plate-shaped stem 190 is lowered again along the plate-shaped stem guide groove 151 of the bonnet 150 so that the disc contact portion 192 of the plate-shaped stem 190 contacts the plate- 224).

8 (b): The plate-shaped stem 190 is lowered along the plate-shaped stem guide groove 151 of the bonnet 150 by the stem 140 which is lowered (D) when the handle 110 is continuously rotated (R2) The disc contact portion 192 of the plate-shaped stem 190 slides on the plate-shaped stem contact portion 224 of the disc 220 to cause the disc 220 to swing downward.

8 (c): The descending swing disk 220 is brought into contact with the disk abutting portion 242 of the body 240 by the body abutting portion 223, thereby completing the falling swing S.

9, even if the positive pressure P1 due to the forward fluid F1 is applied, the clamping pressure P3 generated in the screw clamping portions 131 and 141 is applied to the plate stem 190 And the pressure P3 'for pushing the disc 220 in the reverse direction is maintained, so that the closed state of the disc 220 can be forcibly continued.

The tube insertion portion 222 of the elliptic cone structure on the front surface of the disk 220 formed to have the same size as the inlet end 240al of the inclined body 240 is completely inserted into the inlet portion 240a of the valve, So that sufficient airtightness can be maintained even when a sheet is not particularly applied.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be clear to those who have knowledge.

100:
110: Handle
120: Bearings
130: Stem nut
131: screw groove
140: Stem
141: Threaded
142: plate-shaped stem coupling portion
150: Bonnet
151: plate type stem guide groove
160: Grand
170: Packing
180: back sheet
190: plate type stem
191:
192: disk contact
200:
220: Disk
221: Body coupling projection
222:
223: Body contact part
224: plate-shaped stem contact portion
225: detent jaw contact
230: disk pin
240: Body
240a:
240b:
240c:
241: Disk coupling portion
242:
243: disk stop jaw

Claims (5)

An operation part (200) disposed on the pipeline and closed by the pressure of the fluid flowing in the forward direction and closed by the pressure of the fluid flowing in the reverse direction;
And a driving unit (100) for artificially closing the operation unit (200) or adjusting the flow rate when the fluid flows in the forward direction,

The operation part 200
A body 240 installed on the pipeline and having a forward fluid flowing into the inlet 240a and discharged to the outlet 240b,
And a disc 220 formed on the inlet 240a of the body and hinged to the body 240 to swing downward to close the channel or swing up to open the channel,

The body 240 is
When the lower end 240ab of the inflow portion 240a is longer than the upper end 240at of the inflow portion 240a so that the inflow end 240al is formed to be inclined,
Which is formed by recessing at a slope such as a straight line connecting the upper end 240at 'and the lower end 240ab' of the inflow portion 240a to abut the body contacting portion 223 of the disk 220 when the disk 220 is closed, (242)

The disc 220 is
A channel insertion portion 222 having a diameter (R222a, R222b, R222c, R222d) smaller than the disk diameter (R220) on the surface contacting the forward fluid and protruding into the elliptic cone structure to correspond to the inclined inlet end (240al) ,
The surface of the disk 220 facing the fluid flowing in the forward direction, excluding the channel insertion portion 222, includes a body contact portion 223,
The lower end portion of the disk 220 in contact with the reverse fluid has a detent jaw contact portion 225 formed to contact the disk detaching jaw 243 of the body with the jaw contact portion 225 stopping when the disk 220 is opened to the maximum Including,

The driving unit 100
A handle 110 for generating a rotational force,
A stem nut 130 having a cylindrical shape and rotated by receiving the rotational force of the handle 110,
A stem 140 passing through the stem nut 130,
A plate-shaped stem 190 coupled to the lower end of the stem 140,
The upper part of the body 240 and the inlet part 240a and the discharge part 240b are coupled to each other to receive and engage the structure of the driving part except for the handle 110 and to move the stem 140 and the plate- Including the bonnet 150 supporting the motion,
A thread 141 is formed on the outer circumferential surface of one side of the stem 140 and a corresponding thread groove 131 is formed on the inner circumferential surface of the stem nut 130. When the stem 140 rotates, .

The plate-shaped stem 190 is in the form of a plate perpendicular to the flow direction of the fluid,
The lower end face of the plate-shaped stem 190 is a circular disk-shaped contact portion 192 having a curved side end face
The disc abutment portion 192 of the plate-shaped stem 190 is configured to abut the disc 220 at a long distance horizontally when the plate-shaped stem 190 descends,

When the bonnet 150 is fastened to the body 240, the fastening height 240ah of the inlet 240a is designed to be higher than the fastening height 240bh of the outlet 240b,
And the axis of the driving part 100 and the axis of the discharging part 240b are inclined so as to form an acute angle?
Forced closing check valve.
The method according to claim 1,
The channel inserting portion 222 of the disk 220
The diameters R222b and R222d of the portions of the disk 220 that end with the diameters R222a and R222c of the protrusion start portions are designed to be smaller and the sides of the protrusions are inclined,
The elliptic cone structure in which the vertical diameters R222c and R222d are designed to be longer than the horizontal diameters R222a and R222b of the protrusions is formed,
When the disk 220 is closed, the channel inserting portion 222 of the elliptic cone structure completely closes the inclined inlet portion 240a.
Forced closing check valve.
The method according to claim 1,
At the upper end of the plate-shaped stem 190, a stem fastening part 191 having a horizontal long groove is formed on both sides,
The lower end of the stem 140 is formed with a plate-shaped stem coupling portion 142 having a shape corresponding to the upper end side end face of the plate-
And a stem coupling part 191 which is an upper end of the plate-like stem 190 is inserted into the plate-shaped stem coupling part 142, which is the lower end of the stem 140
Forced closing check valve.
3. The method of claim 2,
At the upper end of the plate-shaped stem 190, a stem fastening part 191 having a horizontal long groove is formed on both sides,
The lower end of the stem 140 is formed with a plate-shaped stem coupling portion 142 having a shape corresponding to the upper end side end face of the plate-
And a stem coupling part 191 which is an upper end of the plate-like stem 190 is inserted into the plate-shaped stem coupling part 142, which is the lower end of the stem 140
Forced closing check valve.


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