KR200235304Y1 - Opening and closing device for valve - Google Patents

Abstract

The present invention relates to a valve opening and closing device. In a valve in which a valve seat is formed at the inlet; A stem coupled to one side of the valve to vertically move by rotation to closely contact or space the disk from the valve seat; A lower rotating member connected to the stem and rotatably formed on one surface thereof with a one-way tooth portion; An upper rotating member having a one-way tooth portion having the same shape as that of the one-way tooth portion of the upper rotating member; An elastic member for elastically supporting the lower rotating member upwardly between the upper rotating member and the lower rotating member so as to engage with the upper rotating member; And coupling means for rotatably coupling the upper rotary member to the upper portion of the stem with the lower rotary member interposed therebetween; The one-way teeth, one side of each tooth has an obtuse angle, the opposite side is formed to have an acute angle of 90 degrees or less, the upper rotating member is always in one direction the lower rotating member coupled by the elastic force of the spring. It is a technical point that it rotates, and to turn in the other direction when more than a constant force is applied. It is possible to prevent wear or deformation of the valve seat caused by the disk pressurizing the valve seat with more force than necessary, thereby providing a reliable valve for a substantially long time.

Description

Opening and closing device for valve}

The present invention relates to a device for opening and closing a valve for controlling the intermittent flow of fluid, and more particularly, by closing the valve at a constant force at all times to prevent excessive force is applied to the opening and closing part so that the valve can be used for a long time A valve opening and closing device is configured.

1 shows the internal configuration of a typical valve. As shown, the valve body 10 is provided with an inlet (In) through which the fluid is introduced and an outlet (Out) through which the introduced fluid is discharged. And a mechanism for controlling the flow of the fluid flowing from the inlet (In) to the outlet (Out) is built.

The bonnet 16 is coupled to the upper end of the valve body 10, and forms a sealed space R therebetween. Since the space R is a portion through which the fluid passes, the gasket 11 is interposed therebetween in order to ensure the tightness of the space.

In addition, a stem 12 is vertically connected to the central portion of the bonnet 16. The stem 12 and the bonnet 16 are screwed together. That is, since the outer circumferential surface of the stem 12 and the inner circumferential surface of the bonnet 16 in contact with the stem are screwed to each other, they can be completely engaged with each other. When the stem 12 is rotated in this state, the stem 12 will move up and down with respect to the fixed bonnet 16.

And the lower end part of the said stem 12 is provided with the disk 12a which has a taper shape which becomes small in diameter, and the handle 20 for an operator's grip is assembled in the upper end part. The handle 20 is for rotating the stem 12. When the operator rotates the handle 20, the stem 12 substantially moves up and down.

The disk 12a provided in the lower end part of the said stem 12 is a part which comes into contact with the valve seat 14 which forms the upper end part of the inlet In. That is, in order to close the valve, the tape 12a having a tapered shape must be brought into close contact with the inside of the valve seat 14, and the disk 12a is to close the fluid by close contact or separation with the valve seat 14. It becomes possible.

However, according to the conventional technology, the following disadvantages are pointed out.

When the operator manipulates the handle 20 to close the valve, the disk 12a comes into contact with the valve seat 14, whereby the contact force of the disk 12a is dependent on the force of the operator operating the handle 20. Depends on. Therefore, if the disk is operated with a relatively large force, the disk 12a maintains a state in which the valve seat 14 is pressed with a very strong force. In this case, of course, it becomes very difficult when the valve is actually opened, and since the valve seat 14 is likely to be damaged by the pressing force, there is a disadvantage in that it is difficult to use for a long time.

In the valve opening and closing device as described above, it can be said that it is most preferable to allow the disk to press the valve seat with a substantially uniform force. If the disk presses the valve seat with the same force, since a constant force is always applied, the disk seat can be used for a long time because the valve seat is not damaged and the valve seat is not damaged.

An object of the present invention is to provide a valve opening and closing device that can be used for a long time by allowing the disk to pressurize the valve seat at the same force at all times.

1 is a cross-sectional view showing a conventional valve opening and closing device.

Figure 2 is a cross-sectional view showing a valve opening and closing device according to the present invention.

Figure 3 is an exploded perspective view of the main portion of the valve opening and closing device according to the present invention.

Explanation of symbols on the main parts of the drawings

110 ..... Valve Body 112 ..... Stem

112a ..... disc 114 ..... valve seat

116 ..... Bonnet 200 ..... Handle

202 ..... Auxiliary handle 204 ..... spring

206 ..... lower rotating member 208 ..... upper rotating member

212 ..... Bolt

According to the present invention for achieving the above object, the inlet and outlet which the fluid is introduced into the sealed space formed by the valve body and the bonnet, the disc is in close contact with the valve seat formed on the upper side of the inlet In the valve which opens and closes; A stem coupled to one side of the valve to vertically move by rotation to closely contact or space the disk from the valve seat; A lower rotating member connected to the stem and rotatably formed on one surface thereof with a one-way tooth portion; An upper rotating member having a one-way tooth portion having the same shape as that of the one-way tooth portion of the upper rotating member; An elastic member for elastically supporting the lower rotating member upwardly between the upper rotating member and the lower rotating member so as to engage with the upper rotating member; And coupling means for rotatably coupling the upper rotary member to the upper portion of the stem with the lower rotary member interposed therebetween; The one-way teeth, one side of each tooth has an obtuse angle, the opposite side is formed to have an acute angle of 90 degrees or less, the upper rotating member is always in one direction the lower rotating member coupled by the elastic force of the spring. It is a technical point that it rotates, and to turn in the other direction when more than a constant force is applied.

And the outside of the upper rotary member, it is installed so as to interlock with it, it is configured to further comprise a handle for holding during the rotation operation of the operator.

And according to one embodiment of the coupling means, it is composed of a bolt for rotatably coupling the upper rotary member to the upper surface of the stem with the lower rotary member in between.

According to the present invention, the close contact of the disk for pressing the valve seat is determined by the rotation of the stem, the upper rotation member for rotating the stem at this time, if a certain force or more will be lost. Accordingly, the disk can prevent abrasion or deformation of the valve seat caused by pressing the valve seat with more force than necessary, thereby providing a valve that is substantially reliable for a long time.

Next, the present invention will be described in more detail with reference to the embodiments shown in the drawings.

2 is a cross-sectional view of an overall assembled state of the apparatus according to the present invention, and Figure 3 is an exploded perspective view of the main portion of the present invention.

As shown, the valve body 110 is provided with an inlet (In) through which the fluid is introduced and an outlet (Out) through which the introduced fluid is discharged. Bonnet 116 is coupled to the upper end of the valve body 110 to form a closed space (R) therebetween, in order to ensure the sealing therebetween, the gasket 111 is interposed therebetween Can be.

The stem 112 is configured to penetrate in the vertical direction at the central portion of the bonnet 116. The stem 112 and the bonnet 116 are screwed together. That is, since the outer circumferential surface of the stem 112 and the inner circumferential surface of the bonnet 116 in contact with the stem are screwed to each other, it can be completely engaged with each other. When the stem 112 is rotated in this state, the stem 12 will move up and down relative to the fixed bonnet 116.

At the lower end of the stem 112, there is provided a disk 112a having a tapered shape, the diameter of which is reduced downward, and a handle 200 for holding by the operator at the upper end. The handle 200 is for rotating the stem 112. When the operator rotates the handle 200, the stem 112 substantially moves up and down.

The disk 112a provided in the lower end part of the said stem 112 is a part which comes into contact with the valve seat 114 which forms the upper end part of the inlet In. That is, in order to close the valve, the tape 112a having a tapered shape must be brought into close contact with the inside of the valve seat 114, and the disk 112a is to close the fluid by close contact or separation with the valve seat 114. It becomes possible.

And when explaining the function of the handle 200 in the present invention, when rotated in the direction of the arrow B in Figure 2, the stem 112 is rotated by the rotation of the handle 200 is raised, the disk 112a Is spaced apart from the valve seat 114 to substantially open the valve. When the direction of arrow A is rotated, the stem 112 rotates and descends by the rotation of the handle 200, so that the disk 112a comes into close contact with the valve seat 114 to substantially close the valve. At this time, in the operation of closing the valve, the present invention does not allow the disk 112a to pressurize the valve seat 114 substantially beyond a predetermined limit even if the handle 200 is tightened with a strong force. It is characterized by being configured.

And, as shown in Figure 3, the auxiliary handle 202 is mounted on the upper end of the stem (112). Substantially, the auxiliary handle 202 performs a function similar to that of a conventional handle, for rotating the stem 112 in an emergency, and the stem 112 and the auxiliary handle 202 are directly connected to each other. .

The lower rotating member 206 is coupled to the upper end of the stem 112 with the spring 204 interposed therebetween. The lower rotating member 206 is configured to receive an upward force at an upper end of the stem 112 by a spring 204. At the same time, the lower rotating member 206 is connected to rotate like the stem 112, for example, the pin 203, the pin hole 206e formed on the circumferential surface of the lower rotating member 206 When coupled to the upper outer circumferential surface of the stem 112 in a penetrating state, the lower rotating member 206 and the stem 112 are configured to rotate together. When the lower rotating member 206 rotates in this state, the stem 112 also rotates in the same direction.

In addition, the one-way tooth portion 206a is formed on the upper surface of the constantly lower rotation member 206. In addition, the one-way tooth portion 208a is also formed on the lower surface of the upper rotary member 208 coupled to the one-way tooth portion 206a of the lower rotary member 206. The one-way teeth 206a and 208a will be described with reference to the enlarged part shown in FIG. 2. In the present specification, the one-way tooth portion, for example, is formed into a triangular tooth shape, and any one side (eg, Ga) of the teeth engaged with each other has an obtuse angle a with respect to the horizontal line, and the other one side (eg For example, Gb) is defined as having an acute angle Gb with respect to the horizontal line and exemplarily shown in the enlarged view of FIG. 3.

The lower rotating member 206 will be described with reference to the one-way tooth portion 206. The tooth G formed on the upper surface of the lower rotary member 206 is a triangular tooth shape, and the surface in one direction (Ga) out of the two upper surfaces. ) Has an obtuse angle (a) of greater than 90 degrees with respect to the horizon, and the other face (Gb) has an acute angle (b) of no greater than 90 degrees with respect to the horizon. These obtuse angles (a) and acute angles (b) are clearly shown in FIG. 3. And the angle formed by the plane (Ga) with respect to the vertical line is preferably set in the range of 70 degrees to 85 degrees, the height of each tooth (G) can be set to about 1mm or more, for example, the operation It should be determined according to the capacity of the valve to be.

The one-way teeth 208a formed on the lower surface of the upper rotating member 208 are formed into teeth of a corresponding shape that can be engaged with the one-way teeth of the lower rotating member 206. Therefore, as shown in FIG. 2, when the two one-way teeth 206a and 208a are engaged with each other, when the upper rotating member 208 is rotated in the B direction, the lower rotating member 206 is rotated in any case. do. When the upper rotating member 208 is rotated in the A direction, the two one-way teeth 206a and 208a may slide together due to the plane Ga forming the obtuse angle a. That is, the lower rotating member 206 is elastically supported in the upward direction by the spring 204, and therefore, when the upper rotating member 208 is rotated in the A direction, the lower rotating member 206 is initially. Will rotate as shown. After rotating at a constant rotational speed, the disk 112a comes into contact with the valve seat 114 so that the stem 112 can no longer be lowered substantially. When the upper rotary member 208 is continuously rotated in such a state, the surfaces Ga having the obtuse angle a ride over each other in the one-way teeth 206a and 208a, so that the upper rotary member 208 is substantially It is futile.

And whether or not the rotation of the upper rotating member 208 can rotate the lower rotating member 206, the reaction force (e.g. disk 112a) applied to the stem 112 is applied to the valve seat 114 substantially The upper rotating member 208 will be idle if the lower rotating member 206 is larger than the holding force of the lower rotating member 206 engaged with the upper rotating member 208 by the spring 204. Therefore, the upper rotating member 208 is rotated, in the process of moving the stem 112 downward, the disk 112a attached to the lower end of the stem 112 is in close contact with the valve seat 114 to a predetermined or more frictional force When the reaction force is generated, the upper rotating member 208 will be idle.

Therefore, according to the present invention, the stem 112 cannot be rotated by an abnormal force corresponding to the force determined by the spring 204. Therefore, at the moment when the upper rotating member 208 rotates in a constant manner, it means that the disk 112a is properly engaged with the valve seat 114, and the disk 112a is no longer seated. It is not possible to press the 114. Therefore, a constant force is always applied between the disk 112a and the valve seat 114.

Since the upper rotating member 208 is connected to the handle 200, the rotation of the handle 200 may have the same meaning as the rotation of the upper rotating member 208. Therefore, as described above, the rotation and idleness of the upper rotating member 208 has the same meaning as that of the handle 200.

In the illustrated embodiment, the pin 207 is installed through the pin hole 208a formed on the outer circumferential surface of the upper rotating member 208 and the pin hole 200a formed on the outer circumferential surface of the handle 200. The upper rotating member 208 and the handle 200 can be connected to each other.

The bolt 212 penetrates through the central portion of the handle 200, and the bolt 212 penetrates through the central portion of the upper rotating member 208, the lower rotating member 206, and the spring 204. Thus, the coupling hole 205 is molded into the upper end of the stem 112. When the bolt 212 penetrates through the central portions of the upper rotating member 208 and the lower rotating member 206, the bolts 212 have a constant clearance therebetween, for example, by the upper and lower rotating members 206 and 208. It is configured so that 212 does not rotate. In addition, although the handle 200 and the upper and lower rotating members 206 and 208 are connected to the upper end of the stem 112 by the bolts 212, they do not substantially fasten all of them. Therefore, the rotation of the handle 200 and the upper rotating member 208 in conjunction with the rotation is independent of the bolt 212, the degree of rotation of the lower rotating member 206 selectively rotated by the upper rotating member 208 Independent of bolt 212.

A spring washer 214, a flat washer 216, and a sleeve 218 are interposed between the bolt 212 and the handle 200 to smoothly rotate the handle.

Next, the operation of the handle 200 according to the present invention configured as described above will be described.

When the handle 200 is turned in the direction A (the valve closing direction) shown in FIG. 2, the upper rotating member 208 rotates the lower rotating member 206, and as a result, the stem 112 rotates downward. Will move. The rotation of the lower rotating member 206 by the upper rotating member 208 is caused by the teeth 206a and 208a formed on the respective contact surfaces meshing with each other to rotate. The stem 112 rotates downward by the screwing relationship with the bonnet 116.

When a certain rotational speed is reached, the disk 112a formed at the lower end of the stem 112 comes into contact with the valve seat 114 to form a closed state. In this closed state, the fluid introduced through the inlet (In) does not escape to the outlet (Out), the valve is substantially kept closed.

In the state where the airtight state is maintained, the handle 200 and the upper rotating member 208 turn away even when the handle 200 is continuously turned. That is, the disk 112a at the lower end of the stem 112 is in a state of being rubbed with the valve seat 114 and is already receiving an external force by a predetermined or more frictional force, and in this state, the upper rotating member 208 by the handle 200. ) Rotates, the one-way teeth 206a, 208a are turned away because each tooth is coupled with an obtuse angle Ga in the direction in which the handle is rotated.

Therefore, according to the present invention, the stem 112 that moves downward by the rotation of the handle 200, when the disk 112a comes into contact with the valve seat 114 with a predetermined force, because the handle 200 is idle, It becomes impossible to move downward abnormally. Therefore, it becomes impossible for the disk 112a to press the valve seat 114 more than a predetermined force. This substantially means that the force for the disk 112a to press the valve seat 114 is always constant. This point means that the valve seat 114 is subjected to excessive force, thereby preventing wear caused by unnecessary friction and not being damaged by excessive external force.

In this case, when the valve is to be opened while the valve is blocked, the handle 200 may be rotated in a direction B opposite thereto. When the handle 200 is rotated in the B direction, since the upper rotating member 208 interlocking with the handle is always able to rotate the lower rotating member 206, the stem 112 rotates to move upward. The valve will open. Here, the rotation of the lower rotating member 206 at all times when the upper rotating member 208 rotates in the B direction is attributable to the shape of the teeth of the one-way teeth 206a and 208a. That is, when the handle 200 is rotated in the direction of opening the valve, at this time, the portion receiving the force from the teeth is the surface (Gb) forming an acute angle (b) with respect to the horizontal plane, in any case the upper rotary member 208 And the lower rotating member 206 rotate together.

When the lower rotating member 206 rotates, the stem 112 rotates substantially, and the disk 112a attached to the end thereof is spaced apart from the valve seat 114 to substantially open the valve.

In addition, the auxiliary handle 202 provided at the upper end of the stem 112 is actually directly connected to the stem 112, so that the stem always rotates in any one direction. The auxiliary handle 202 can be used in an emergency such as the handle 202 does not operate normally.

According to the present invention as described above, the upper rotating member and the lower rotating member has a one-way tooth portion engaged with each other, while the lower rotating member is elastically supported by the spring 204, in one direction (the direction in which the valve is closed) It can be seen that it is a basic technical idea that the upper rotating member is turned away by a constant external force so that the disk 112a is not pressed against the valve seat by more than a force determined by the spring 204.

And within the scope of the basic technical idea of the present invention, many other variations will be possible to those of ordinary skill in the art.

According to the present invention configured as described above, since the valve seat is substantially sealed at a constant force at all times, it is possible to prevent damage to the valve seat due to excessive contact of the disk. Therefore, it becomes possible to provide a valve which can perform the interruption of a fluid correctly even in long term use.

Claims (6)

A valve having an inlet through which fluid enters and an outlet through which a fluid is introduced into a closed space formed by a valve body and a bonnet, the valve being opened and closed by being in close contact with a disk seated on an upper side of the inlet; A stem coupled to one side of the valve to vertically move by rotation to closely contact or space the disk from the valve seat; A lower rotating member connected to the stem and rotatably formed on one surface thereof with a one-way tooth portion; An upper rotating member having a one-way tooth portion having the same shape as that of the one-way tooth portion of the upper rotating member; An elastic member for elastically supporting the lower rotating member upwardly between the upper rotating member and the lower rotating member so as to engage with the upper rotating member; And A coupling means for rotatably coupling the upper rotary member to an upper portion of the stem with the lower rotary member interposed therebetween; The one-way teeth, one side of each tooth has an obtuse angle, the opposite side is formed to have an acute angle of 90 degrees or less, the upper rotating member is always in one direction the lower rotating member coupled by the elastic force of the spring. The valve opening and closing device is characterized in that the rotation is rotated, the other direction is more than a constant force. 2. The valve opening and closing device according to claim 1, further comprising a handle which is installed outside the upper rotating member so as to interlock with the upper rotating member, and which is gripped during the rotation operation of the operator. The method of claim 2, wherein the coupling means, Valve opening and closing device comprising a bolt for rotatably coupling the upper rotating member to the upper surface of the stem with the lower rotating member in between. The valve opening and closing device according to any one of claims 1 to 3, further comprising an auxiliary handle which is directly connected to an upper end of the stem to rotate the stem. The valve opening and closing device according to any one of claims 1 to 3, wherein an obtuse surface in the one-way tooth portion has an angle of 70 to 85 degrees with respect to a vertical line. The valve device according to any one of claims 1 to 3, wherein a surface having an acute angle in the one-way tooth portion is molded vertically.