KR20060017689A - Disc moving type butterfly valve - Google Patents

Abstract

The present invention relates to a disk movable butterfly valve, comprising a valve body, a valve disk, a valve shaft, and a drive unit, wherein the valve disk has a tapered cross section on an inner circumferential surface of the disk boss formed on one surface thereof. A valve-shaped recess is mounted, the valve shaft is provided with a wedge-shaped iron portion at the lower side thereof, and an upper threaded screw portion formed thereon with a predetermined width, and the driving portion is a lifting lever nut screwed with the screw portion formed at the upper side of the valve shaft; A worm wheel fixedly coupled to the elevating lever nut, a worm gear positioned at one side of the worm wheel and tooth coupled to the worm wheel, and a clutch coupled to one end of the valve shaft to connect or disconnect the worm wheel and the valve shaft; Anti-rotation means for allowing the clutch to rotate only within a range of a predetermined angle, and the worm gear The present invention is characterized in that it comprises a handle for driving, so that the valve disk is not interfered with the rotation at all, so that the valve disk can be easily rotated with a little power to prevent the wear of the seat ring to effectively index It is effective.

Valve disc, valve shaft, worm wheel, worm gear, clutch, lifting lever nut

Description

DISK MOVING TYPE BUTTERFLY VALVE

1 is an external perspective view showing a portion of a conventional disk pressurized butterfly valve cut out,

Figure 2 is an exploded perspective view of the disk movable butterfly valve of the present invention,

3 is a cross-sectional view of the main components of the disk-moving butterfly valve of the present invention,

4 is an explanatory view showing a wedge-shaped uneven portion and a sheet portion in a state in which the disk movable butterfly valve of the present invention is fully open;

5 is a cross-sectional view taken along line A-A of FIG.

Figure 6 is a partial cross-sectional view for showing the movement state of the valve shaft with respect to the disk movable butterfly valve of the present invention,

7 is an explanatory view showing a wedge-shaped uneven portion and a sheet portion in a state in which the disk movable butterfly valve of the present invention is closed;

8 is a cross-sectional view taken along line B-B of FIG.

9 is an external perspective view showing the driving part of the present invention cut away.

<Explanation of symbols for the main parts of the drawings>

10: valve body 11: valve body seat ring

20: valve disc 21: disc boss

22: wedge recess 23: disc seat ring

30: valve shaft 31: wedge-shaped iron

32: screw portion 40: drive portion

43: worm wheel 44: worm gear

46: clutch 47: stop bolt

δ: separation distance between the valve axis center line and the valve disc boss center line.

The present invention relates to a disk-moving butterfly valve, and in particular, a disk which does not interfere at all with the rotation of the valve disk, so that the valve disk can be easily rotated with little power, thereby preventing the wear of the seat ring to effectively index the disk. It relates to a movable butterfly valve.

In general, the butterfly valve is fixed to the inner circumferential surface of the cylindrical valve body, the disk seat ring on the outer circumference of the disk disk arranged on the valve body with a rotating shaft with a disk sheet fixing ring and a plurality of sheet fixing bolts This butterfly valve is to close the water pipe by rotating the disk at an angle of 90 ° by contacting and pressing the disk seat ring to the valve body seat ring.

However, such a conventional butterfly valve is such that the valve body seat ring of which the contact surface is inclined when the valve is closed and the disc seat ring which is an elastic body or a metal contact in the direction of the fluid flow to block the working pressure of the fluid flow by the pressing force at this time. In the case of the elastic disc seat ring, by tightening the disc seat ring fixing bolt for the purpose of index, the disc seat ring which is the elastic body is permanently deformed and the life is shortened due to the loss of elastic force, and the index is difficult. When tightening and closing the valve, a considerable amount of power is required and leakage occurs due to breakage and abrasion of the elastic sheet when used for a long time, and such leakage phenomenon occurs more and more with high water pressure, especially in the case of rubber material, poor acid resistance and chemical resistance Transporting oil or chemicals It was inappropriate.

The metal disk seat ring proposed to solve the drawbacks of the elastic rubber sheet of the disc seat ring is required to have high processing precision by high technology, so that it is not easy to manufacture for large diameter large diameter valves. There was a difficulty in maintenance such as control.

Accordingly, in order to solve such a closed end, it has been disclosed that the hydraulic cylinders are installed on both sides of the valve body so that the disk is pushed by the hydraulic pressure to close the valve seat when closing, but this is an additional device for installing the hydraulic cylinder. Hydraulic pumps, hydraulic lines, etc. are required to have various problems, such as a complicated structure and a high manufacturing cost. As another method, as shown in FIG. 1, a rotary shaft for rotating the valve disc 51 can be crimped. It is disclosed in Patent Publication No. 0184516 that is formed by the dual structure of the shaft 52 and the disk opening and closing shaft 53 to close the valve seat (not shown), but this also passes the cam 54 through the valve fluid It is constructed in a complex structure such as mounted in the disk boss 55 seated in the aperture and constituting the rotating shafts 52 and 53 in a double structure. The cost is high and there is a problem in efficient flow control because there is a possibility of water leakage because the cam 54 is not in close contact with the wear of the cam 54, and there is a problem of maintenance such as replacement of parts when the sheet (not shown) and the cam 54 are worn. There are various problems such as not working.

The present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is that the valve disk is easily rotated with a little power because the valve disk does not interfere at all, the sheet made of an elastic body and a metal material Disc moving butterfly valve to prevent the wear of the ring can be effectively indexed.

Another object of the present invention is to provide a disk movable butterfly valve which is simple in structure and can be processed more easily and precisely.

Another object of the present invention is to provide a disk-moving butterfly valve which allows the valve to be used semi-permanently by adjusting the amount of crimping of the sheet ring according to the degree of wear of the sheet due to the use of the valve for a long time.

Disc moving butterfly valve according to the present invention for achieving the above object is a valve body having a fluid passage through which the fluid flows, a valve disc for opening and closing the fluid passage of the valve body, and the valve disc In a disk moving butterfly valve having a valve shaft for rotating or linearly moving in the fluid passage of the valve body, and a drive portion mounted to the outer surface of the valve body for driving the valve shaft, the valve disk is A wedge-shaped recess having a tapered cross section is mounted on an inner circumferential surface of the disk boss formed on one surface, and the wedge-shaped iron portion is mounted at a position corresponding to the wedge-shaped recess mounted on the inner circumferential surface of the disk boss at a lower side thereof. The upper side is provided with a threaded portion formed with a thread by a predetermined width, and the drive portion is the valve shaft A lift lever nut screwed with a screw formed on an upper side, a worm wheel fixedly coupled to the lift lever nut, a worm gear positioned at one side of the worm wheel and tooth-coupled with the worm wheel, and coupled to one end of the valve shaft. And a clutch for connecting or disconnecting the worm wheel and the valve shaft, rotation preventing means for allowing the clutch to rotate only within a range of a predetermined angle, and a handle for driving the worm gear.

In addition, the clutch of the disk-type butterfly valve according to the present invention, the clutch spring is inserted into the groove formed on one surface of the clutch in order to connect or separate the worm wheel and the valve shaft, and the elastic force of the clutch spring It is preferable to have a clutch ball elastically installed in the insertion groove formed on one surface of the worm wheel.

In addition, the rotation preventing means of the disk-moving butterfly valve according to the present invention is preferably made of a predetermined groove portion formed on one surface of the clutch and a stop bolt fitted to the groove portion so that the clutch rotates only within a predetermined angle range. Do.                         

In addition, it is more preferable that an adjustment bolt for adjusting the vertical movement amount of the valve shaft in the disk movable butterfly valve according to the orphan is further mounted on one side of the driving unit along the center line of the valve shaft.

Hereinafter, the disk movable butterfly valve according to the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 to 9 is a view for explaining the structure of each part of the disk-moving butterfly valve according to the present invention, Figure 2 is an exploded perspective view of the disk-moving butterfly valve of the present invention, Figures 3 to 5 of the present invention 6 and 8 are cross-sectional views and explanatory views showing the structure of each part in a state where the disc movable butterfly valve is fully open, and FIG. 9 is an external perspective view showing the driving part of the present invention cut away.

As shown in FIGS. 2, 3, and 5, the disk-moving butterfly valve according to the present invention is provided with a fluid passage through which fluid flows, and a valve body seat ring 11 is fixed to an inner circumferential surface thereof. Rotating or linearly moving the valve body 10, the valve disc 20 for opening and closing the fluid passage of the valve body 10, and the valve disc 2 in the fluid passage of the valve body 10. It includes a valve shaft for 30, and a drive unit 40 is mounted to the outer surface of the valve body 10 for driving the valve shaft (30).

As shown in FIG. 2, the valve disc 20 has a disc seat ring 23 fixedly attached to its outer circumference along a circumference thereof, and a disc boss 21 is mounted on one surface thereof so as to be spaced apart by a predetermined distance. The disc boss 21 has a wedge-shaped recess 22 having a tapered shape in the inner circumferential surface thereof, and is fixedly mounted by a bolt (not shown).

As shown in FIGS. 3 to 8, the wedge-shaped convex part 31 is bolted at a position corresponding to the wedge-shaped recessed part 22 mounted on the inner circumferential surface of the disc boss 21. (Not shown), the upper end side of which is formed in the shape of a square in order to be rotated together with the clutch when the screw portion 32 and the clutch 46 to be described later and the threaded portion formed by a predetermined width is rotated The rotary part 33 is provided, and the valve shaft 30 is wrapped by a valve shaft cover 12 extending from the valve body 10.

As shown in FIGS. 2 and 3, the driving unit 40 includes a lifting lever nut 41 and a worm wheel 43 installed in a gear box 49 having a rear cover 49a and a front cover 49b. And a worm gear 44, a clutch 46, a rotation preventing means, and a handle (not shown).

The elevating lever nut 41 has a screw thread formed on its inner circumferential surface so as to be screwed with the threaded portion 32 of the valve shaft 30, and a key groove 41a is formed on the outer circumferential surface thereof.

The worm wheel 43 has a through hole having a predetermined size in the center thereof, a key groove 43a is formed on the inner circumferential surface of the through hole, and a plurality of the worm wheels 43 for elastically installing the clutch ball 45 to be described later. The insertion groove 43b is formed.

In order to couple the lifting lever nut 41 and the worm wheel 43, the key groove 41a of the lifting lever nut 41 is opposed to the key groove 43a of the worm wheel 43, and then the key groove 43a. The key 42 is mounted in the) and the lifting lever nut 41 is inserted into the through hole of the worm wheel 43 to be fixedly coupled thereto.

The worm gear 44 is located on one side of the worm wheel 43 is tooth-coupled with the worm wheel 43, a handle not shown is coupled to the upper side, the worm gear 44 is rotated by rotating the handle The worm wheel 43 is also rotated accordingly, and when the worm wheel 43 is rotated, the lifting lever nut 41 is also rotated together.

The clutch 46 is coupled to one end of the valve shaft 30 so as to connect or separate the worm wheel and the valve shaft. A rectangular through hole is formed at the center thereof, and the through hole Since the rotating part 33 formed at the end of the valve shaft 30 is coupled, the valve shaft 30 is also rotated together by the rectangular rotating part 33 when the clutch 46 is rotated.

As a detailed configuration for connecting or disconnecting the worm wheel and the clutch 46, various structures may be adopted. For example, a clutch spring 46a inserted into a groove formed on one surface of the clutch may be used. The clutch ball 45 may be used to be elastically installed in the insertion groove 43b formed on one surface of the worm wheel 43 by the elastic force of the clutch spring 46a.

The anti-rotation means serves to rotate the clutch 46 only within a range of a predetermined angle, and as a specific example, a predetermined groove portion is formed on one surface of the clutch 46 in a fan shape, and the groove portion stops. The bolts 47 may be inserted in a right angle, and the clutch 46 rotated together with the worm wheels 43 by the stop bolts 47 may rotate only as much as a predetermined angle and no further rotation may be possible. do.

In addition, the adjusting bolt 50 is formed on one side of the drive unit 40 along the centerline of the valve shaft 30, that is, the clutch cover 48 in the center of the clutch cover 48 so as to adjust the vertical movement amount of the valve shaft 30. It is effective to be screwed into the provided through hole.

Referring to the operation of the disk-moving butterfly valve according to the present invention having the above configuration as follows.

The disc movable butterfly valve according to the present invention has a wedge-shaped recess as shown in FIGS. 3 and 4 when the valve disc 20 is horizontally opened in the valve body 10 as shown in FIG. 2. Both ends of the 22 and the convex portion 31 are engaged to coincide, and the center line of the valve shaft 30 and the center line of the valve disc boss 21 coincide with each other as shown in FIG. As shown in the portion of the clutch ball 45 is inserted into the insertion groove (43b) formed on one surface of the worm wheel 43, the worm wheel 43 and the clutch 46 is coupled to enable rotation together.

In order to rotate the valve disc 20 in the closed position at an angle of 90 ° in the above state, when the handle (not shown) mounted on the upper end of the worm gear 44 shown in FIG. 9 is rotated, the worm gear 44 and the tooth shape are rotated. The worm wheel 43 is rotated, and when the worm wheel 43 is rotated, as shown in FIG. 3, the worm wheel 43 is coupled to the clutch 46 by the clutch ball 45. The rotational force of the 43 is transmitted to the clutch 46, so that when the clutch 46 is rotated, the valve shaft 30 rotates together with the clutch 46, and thus the rotation of the valve shaft 30 is performed. In addition, the valve disc 20 is rotated by a predetermined angle.

As described above, when the valve disc 20 is rotated at a closed angle of 90 °, even if the handle (not shown) mounted on the upper end of the worm gear 44 is continuously rotated, a fan shape is formed on one surface of the clutch 46 as shown in FIG. One side of the groove portion formed in the shape so that no further rotation by the stop bolt 47, the valve disk 20 is no longer rotated to maintain a fixed state.

In this state, if the handle (not shown) rotated on the top of the worm gear 44 continues to rotate, the clutch ball 45 fixed between the worm wheel 43 and the clutch 46 presses the clutch spring 46a strongly. Accordingly, as illustrated in FIG. 6, the clutch ball 45 is separated from the insertion groove 43b of the worm wheel 43, and at the same time, the rotational force of the worm wheel 43 is no longer provided through the clutch 46. Since it is not transmitted to 30, the valve shaft stops rotation in place and remains stopped.

Meanwhile, in this state, the rotational force of the worm wheel 43 is transmitted to the lifting lever nut 41 fixedly coupled to the worm wheel 43 by the key 42. When the lifting lever nut 41 is rotated, FIG. And the valve shaft 30 screwed up and down with the lifting lever nut 41 as shown in FIG. 7 performs a predetermined amount of linear movement in the right direction in the drawings shown in FIGS. 6 and 7. By the action of the wedge-shaped recess 22 mounted on the inner circumferential surface of the 21 and the wedge-shaped iron portion 31 mounted on the outer circumferential surface of the valve shaft 30, the valve body 10 is closed at a 90 ° angle. Horizontal movement of the rotated valve disc 20 downward, that is, the center line of the valve shaft 30 and the center line of the valve disc boss 21 is spaced apart by δ, as shown in Figure 8 disc disk made of an elastic body or a metal material The ring 23 is pressed against the body seat ring 11 to make an index.

In addition, as shown in FIGS. 3 and 6, the adjustment bolt 50 is mounted in a through hole having a screw thread formed at one side of the driving part 40, that is, the center of the clutch cover 48, along the center line of the valve shaft 30. In this case, the amount of linear movement of the valve shaft 30, that is, the amount of horizontal movement toward the front of the valve disc 20 can be adjusted, so that the amount of compression of the valve disc seat ring 23 can be adjusted. The amount of crimping of the sheet ring can be adjusted according to the degree of wear of the sheet.

In the disk movable butterfly valve of the present invention as described above, the valve disk sheet 20 in which the valve body sheet ring 11 and the valve disk sheet ring 23 made of an elastic body or a metal are integrally installed is not interfered with at all. After rotating at a predetermined angle, that is, 90 °, the valve disc 20 moves horizontally forward to the valve body 10 seat ring 11 while the valve shaft 30 moves linearly in the state. By indexing the ring 23 to the body seat ring 11, the valve structure can be simplified and processed more precisely, while preventing the wear of the disc seat ring. There is an effect that can be achieved.                     

Although the present invention has been described with reference to the embodiments shown in the accompanying drawings, this may be regarded as exemplary and various modifications and equivalent embodiments may be devised by those skilled in the art. It should be understood that such equivalent embodiments are also included within the claims of the present invention.

Claims (4)

A valve body having a fluid passage through which the fluid can flow, a valve disc for opening and closing the fluid passage of the valve body, a valve shaft for rotating or linearly moving the valve disc in the fluid passage of the valve body; In the disk-type butterfly valve mounted on the outer side of the valve body having a drive for driving the valve shaft, The valve disk is provided with a wedge-shaped recess having a tapered shape in cross section on an inner circumferential surface of the disk boss formed on one surface thereof. The valve shaft is provided with a wedge-shaped iron portion at a position corresponding to a wedge-shaped recess mounted on an inner circumferential surface of the disc boss on a lower side thereof, and a threaded portion having a thread with a predetermined width is provided on the upper side thereof. The driving unit includes a lift lever nut screwed with a screw formed on an upper side of the valve shaft, a worm wheel fixedly coupled to the lift lever nut, a worm gear positioned at one side of the worm wheel and tooth-coupled with the worm wheel; A clutch coupled to one end of the valve shaft to connect or disconnect the worm wheel and the valve shaft, rotation preventing means for allowing the clutch to rotate only within a range of a predetermined angle, and a handle for driving the worm gear. Disc movable butterfly valve characterized by. The clutch of claim 1, wherein the clutch is inserted into a groove formed in one surface of the clutch to connect or separate the worm wheel and the valve shaft, and the clutch spring is connected to one surface of the worm wheel by an elastic force of the clutch spring. Disc moving butterfly valve characterized in that it comprises a clutch ball that is elastically installed in the formed groove. 2. The disk moving butter according to claim 1, wherein the rotation preventing means comprises a predetermined groove formed on one surface of the clutch and a stop bolt fitted to the groove so that the clutch rotates only within a predetermined angle range. Fly valve. The disk moving butterfly valve of claim 1, wherein an adjustment bolt for adjusting the vertical movement amount of the valve shaft is further mounted on one side of the driving unit along a center line of the valve shaft.

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