KR20220090305A - Damper - Google Patents

Abstract

Disclosed is a damper capable of blocking leakage and maintaining an open degree. The present invention provides a disc-shaped blade capable of opening and closing the air passing through the housing inside the housing by a rotating shaft penetrating the housing, extending both ends of the rotating shaft to the outside of the housing to manually rotate the blade at one end of the rotating shaft In the damper to which a handle is attached and the other end of the rotation shaft protrudes out of the housing, a sealing box for blocking air flow between the rotation shaft and the housing is provided around the exposed portion of one end of the rotation shaft to which the handle is attached, the sealing box having one end of the rotation shaft A box body accommodating the exposed part and the handle therein, a first packing member installed to form a closed path along the open surface of the box body, and a second packing coupled to the box body and matching the first packing member and a box cover in which the second packing member is in close contact with the first packing member when the member is provided and locked with the box body by the locking means.

Description

damper {DAMPER}

The present invention relates to a damper, and more particularly, a leak blocking and opening degree maintenance damper that can prevent the inflow of external air into the damper or the outflow of conditioned air to the outside of the damper and maintain the opening degree set by the user without change. is about

A damper capable of opening and closing the air flow is installed at the duct inlet, middle of the duct, or the duct outlet of a building ventilation device, air conditioning device, ventilation device, exhaust device such as a clean room, etc. At this time, when the airtightness of the damper is poor, air mixing between the inside and outside may occur, resulting in wastage of heat and contamination of the internal air.

In general, a damper is provided with a blade or a movable plate that can open and close the flow path while rotating around a rotational shaft inside the housing. It has a structure in which the flow path opens when rotated. On the other hand, the rotating shaft to which the blade or the movable plate is coupled is installed through the housing. Due to this, there is a gap between the rotation shaft of the damper and the housing through which external air may flow into the damper or flow air in the damper may leak to the outside. In particular, in a damper installed in a clean room, when external polluted air continuously flows through these gaps for a long time, it is difficult to maintain a clean state of the air as well as an appropriate temperature and humidity inside the clean room. Therefore, it is necessary to prevent leakage from occurring in the gap between the rotation shaft of the damper and the housing.

On the other hand, in the manual damper, not only does the blade or movable plate completely open or close, but there is a handle for manually rotating the rotating shaft in order to maintain an open state at a constant opening degree, and after rotating the blade or movable plate to an appropriate opening degree, the opening degree is returned to that state. A rotating shaft fixing device is required to hold it.

In the invention of Patent Registration No. 10-0886103, in order to prevent leakage from occurring through the gap between the shaft of the damper and the damper barrel, the tip of the shaft in the direction where the handle is not provided is sealed with a sealing cap, etc. The shaft in the direction is provided with a tapered support ring and a packing member, and an add-on ring in order to maintain airtightness in the penetrating portion of the damper barrel. In addition, according to the invention of Korean Patent Publication No. 10-0886103, a shaft is passed through one side of the disk to the outside in order to prevent the damper from rotating in an unwanted direction due to vibration or carelessness, and the housing so that the penetrating shaft passes through the center again. A support is formed on the outside of the support, the lever is fitted to the shaft in an angled form from the outside of the support, a nut is screwed to the end of the shaft, a compression spring is inserted between the lever and the upper portion of the support toward the lever A protruding stopper is formed, and a plurality of selection holes are formed in an arc shape so that the stoppers are selectively inserted on the upper part of the lever. opening is maintained.

However, according to the invention of Patent Registration No. 10-0886103, since the shaft is inserted into the center of the support ring, the packing member, and the joining ring and spaced apart enough to rotate, leakage occurs due to this. If the packing member is pressed against the shaft to the extent that leakage does not occur, the rotation of the lever is not smooth. That is, there is a limit to blocking leakage by the method of wrapping the packing member around the rotating shaft.

According to the invention of Korean Patent Publication No. 10-0886103, it is difficult to accurately insert the selection hole into the stopper because it is difficult to confirm the position of the stopper after lifting the lever over the spring to maintain the opening degree.

The present invention has been made to solve the problem of leakage occurring in the gap between the rotating shaft and the housing of the conventional damper described above. , to provide a damper that can block leakage that may occur in the gap between the rotating shaft and the housing.

The second object to be solved by the present invention is to provide a damper that can be easily adjusted by an operator while visually checking the opening degree, and can prevent the opening degree from being changed by the fixing nut being finely loosened by vibration after adjusting the opening degree. have.

The first object of the present invention described above is to install a disk-shaped blade capable of opening and closing the air passing through the housing inside the housing by a rotating shaft penetrating the housing, extending both ends of the rotating shaft to the outside of the housing, so that one end of the rotating shaft has a blade In the damper with a handle capable of manually rotating the rotary shaft, and the other end of the rotary shaft protrudes outside the housing, an airtight box for blocking air flow between the rotary shaft and the housing is provided around the exposed portion of one end of the rotary shaft to which the handle is attached. , The sealed box includes a box body accommodating one end of the rotation shaft exposed portion and the handle therein, a first packing member installed to form a closed path along the open surface of the box body, is coupled to the box body and the first packing It can be solved by a damper including a box cover in which a second packing member matching the member is provided and the second packing member is in close contact with the first packing member when it is locked with the box body by the locking means. At this time, a sealing cap is provided at the other end of the rotating shaft to maintain airtightness.

The second object of the present invention described above is to provide a tunnel-type bracket between the handle and the housing, the surface of which is in contact with the back surface of the handle, and a guide groove forming a curved surface around one end of the rotation shaft is formed in the bracket, and the Inserting a handle fixing bolt penetrating the handle from the inside of the guide groove to the outside, and tightening the thumb nut to the handle fixing bolt to adjust the opening degree of the blade by rotating the handle, then tightening the butterfly nut to fix the blade , An uneven portion is formed on the edge of the guide groove, and an engaging projection protruding in the shape of the uneven portion is formed on the head of the hand holding bolt. This can be solved by making it firmly fixed to the bracket.

In another method, the second object of the present invention described above is to provide a tunnel-type bracket in which the surface is in contact with the back surface of the handle under the handle, and a guide groove forming a curved surface around one end of the rotation shaft is formed in the bracket, , Insert a handle fixing bolt penetrating the handle from the inside to the outside of the guide groove, and then tighten the butterfly nut to fix the blade after adjusting the opening degree of the blade by rotating the handle by fastening a butterfly nut to the handle fixing bolt A protrusion is formed on the back surface of the handle, and a plurality of locking jaws on which the projections are caught are continuously formed on the surface of the bracket. It can be solved by being inserted between the two to firmly fix the handle to the bracket.

According to the present invention having the above-described configuration, one end of the rotation shaft on the handle side is airtight maintained by the sealing box, and the other end of the rotation shaft on the opposite side of the handle is hermetically maintained by the sealing cap. Since the first packing member and the second packing member of the sealed box are separated from the rotating shaft, there is no concern about wear due to the rotation of the rotating shaft, and the second packing member of the box cover is attached to the first packing of the box body regardless of the rotating shaft and rotation. It can be locked by pressing strongly on the member. Therefore, it is possible to maintain the strong sealing force inside the sealing box for a long time.

In addition, according to the present invention, an uneven portion is formed on the edge of the guide groove of the bracket exposed to the outside, and an engaging protrusion having the same shape as the uneven portion is formed on the head of the handle fixing bolt to adjust the opening degree of the blade and then attach the handle to the handle. When fixing to the bracket by fixing bolts and butterfly nuts, the engaging protrusions are inserted into the recesses of the concave and convex parts and fixed. .

In addition, according to the present invention, if the locking jaws are continuously formed on the surface of the bracket exposed to the outside, a protrusion is formed on the back surface of the handle, the handle is held and the rotation shaft is rotated to adjust the opening degree of the blade, and then the butterfly nut is tightened, Since the protrusion on the back of the handle is inserted and fixed between the locking jaws on the surface of the bracket, it is possible to prevent the damper opening degree from being changed by loosening the butterfly nut due to external factors such as strong wind speed or vibration.

1 is a perspective view showing the removal of the sealing box on the handle side of the rotating shaft in the damper according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view illustrating the damper shown in FIG. 1 by separating the bracket and the handle from the housing of the damper.
Figure 3 is a perspective view showing the removal of the sealing box on the handle side of the rotary shaft in the damper according to another embodiment of the present invention.
4 is a perspective view of the damper shown in FIG. 3 in the direction of the lower surface by removing the handle.
FIG. 5 is a front view of the damper shown in FIG. 3 .
Figure 6 is a perspective view showing the damper provided with a sealed box according to the present invention in an open state of the box cover of the sealed box.
7 is a perspective view showing a damper having a sealed box according to the present invention in a closed state with the box cover of the sealed box.
FIG. 8 is a longitudinal sectional view of the damper shown in FIG. 7 .
FIG. 9 is a cross-sectional view of the damper shown in FIG. 7 ;

Hereinafter, a specific embodiment of a damper according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 8, the damper according to the present invention includes a cylindrical housing 1, a disk-shaped blade 3 disposed inside the housing, and supporting and rotating the blade 3 It includes a rotating shaft (5a, 5b) for. The rotating shafts 5a and 5b can be separated into two. The rotating shafts (5a, 5b) are installed to penetrate the housing (1), and one end (5a) of the rotating shaft (5a, 5b) is exposed longer than the other end (5b) to attach the handle (15). Turn the handle 15 to adjust the opening degree of the blade 3 by turning the rotating shafts 5a and 5b and the blade 3 coupled thereto. The other ends of the rotation shafts 5a and 5b are exposed only to the extent that the rotation shafts 5a and 5b are supported through the through hole of the housing 1, and then the periphery of the through hole and the exposed portion of the other end of the rotation shaft 5b are placed in the sealing gap 47. wrapped and sealed by By replacing the sealing gap 47, a sealing box may be provided to wrap and seal.

As described above, the present invention installs a disk-shaped blade 3 capable of opening and closing the air passing through the housing 1 or adjusting the amount of air inside the housing 1 by means of rotating shafts 5a and 5b passing through the housing, Both ends of the rotating shafts (5a, 5b) are extended to the outside of the housing (1), and a handle (15) capable of manually rotating the blade (3) is attached to one end of the rotating shaft (5a, 5b), and the other end of the rotating shaft (5a, 5b) is applied to a damper that may cause leakage between the rotating shafts 5a and 5b and the housing 1, such as a damper protruding outside the housing 1 .

6 to 9, a feature of the present invention is the air between the rotating shafts 5a and 5b to which the handle 15 is attached, one end exposed around the rotating shafts 5a and 5b and the housing 1 It is in providing an airtight box 29 to block the flow. The sealed box 29 should be opened when the operator adjusts the damper opening, and closed when the opening adjustment operation is finished to maintain airtightness. To this end, the sealed box 29 includes a box body 31 capable of accommodating all the gaps between the rotating shaft end 5a exposed portion and the handle 15 and the rotating shaft end 5a and the housing 1 therein; , a first packing member (35a) installed to form a closed path along the open surface of the box body (31), and a second packing member coupled to the box body (31) and matched with the first packing member (35a) (35b) is provided and configured to include a box cover 33 in which the second packing member 35b is in close contact with the first packing member 35a when it is locked with the box body 31 by the locking means. The material of the first packing member 35a and the second packing member 35b is rubber or silicone. The first packing member 35a and the second packing member 35b are continuous without a discontinuous surface. The box body 31 and the box cover 33 may be coupled by a hinge 37 .

6 and 7, the locking means is coupled to the box cover 33 and provided on the side of the locking wing 41 in which the locking groove 43 is formed, and the box body 31, the locking means It includes a locking protrusion 45 fastened to the groove 43, and the position of the locking protrusion 45 is the first packing member 35a and the second packing member 35b when the locking protrusion 45 is fastened to the locking groove 43. is a position where they can be pressed against each other. By configuring in this way, the gap between the rotating shaft end 5a and the housing 1 can be completely sealed. The box cover 33 and the locking wing 41 may be coupled by a hinge 39 .

As can be seen with reference to FIGS. 8 and 9 , with this configuration, one end of the rotation shaft on the handle side (5a) is airtightly maintained by the sealing box (29), and the other end (5b) of the rotation shaft on the opposite side of the handle is Airtightness is maintained by the sealing cap (47). Since the first packing member 35a and the second packing member 35b of the sealed box 29 are separated from the rotating shafts 5a and 5b, there is no fear of wear due to the rotation of the rotating shafts 5a and 5b, and the rotating shaft The second packing member (35b) of the box cover (33) is strongly pressed against the first packing member (35a) of the box body (31) irrespective of the rotation (5a, 5b) to be locked. Therefore, it is possible to maintain a strong sealing force inside the sealing box 29 for a long time, and it is possible to prevent a phenomenon that external air is introduced into the air conditioning system through the damper and becomes contaminated.

As shown in FIG. 2 , a tunnel-type bracket 9 is provided between the handle 15 and the housing. The handle 15 includes a horizontal portion 19 in contact with the surface of the bracket 9, a gripping portion 17 extending upward from the horizontal portion 19, and a sleeve into which the rotating shaft end 5a is inserted. 25). The surface of the bracket 9 is in contact with the back surface of the horizontal portion 19 of the handle. One end of the rotation shaft 5a is inserted into the sleeve 25 of the handle 15 and is integrally fixed with the handle 15 by a sleeve fixing bolt 27, and when the handle 15 is rotated, the rotation shafts 5a and 5b) And the blade 3 coupled thereto also rotates at the same angle at the same time. In order to check the opening degree, the opening degree display part 10 may be formed on the surface of the bracket 9 on the opposite side of the handle gripping part 17 .

1 and 2, in order to prevent the degree of opening of the blade 3 set by the operator from being changed by the installation environment such as strong wind speed and vibration, the bracket 9 has one end 5a of the rotating shaft. A guide groove 13 having a curved surface is formed around the guide groove 13, and a handle fixing bolt 21 passing through the handle is inserted from the inside to the outside of the guide groove 13, and the handle fixing bolt 21 has a butterfly After tightening the nut 23 and rotating the handle to adjust the degree of opening of the blade 3 , the handle 15 and the blade 3 connected thereto are fixed by tightening the butterfly nut 23 . At this time, concave-convex portions 12a and 12b are formed on the edge of the guide groove 13, and the head of the hand-held fixing bolt 21 is engaged in the shape of the concave-convex portions 12a and 12b. When the butterfly nut 23 is tightened by forming a protrusion 24, the engaging protrusion 24 engages the concavo-convex portions 12a and 12b to attach the handle 15 to the bracket 9. to be fixed on It is preferable that the cross-sectional shapes of the concave-convex portions 12a and 12b and the engaging protrusion 24 are triangular or quadrangular.

As shown in Fig. 2, the handle fixing bolt 21 extends in the direction of the screw portion from the bolt head 22 and forms each face portion 26 that is closely inserted into the guide groove 13 in four rooms, each It is preferable to form the engagement protrusion 24 in the direction of each surface portion 26 . More preferably, the engaging projection 24 is formed in the center direction of each face portion 26 . The width between each face part 26 and the face part 26 on the opposite face is formed to have a width that is not rotated even though it is inserted into the guide groove 13 . As a result, each face portion 26 is closely inserted into the guide groove 13, and when the handle fixing bolt 21 is inserted into the guide groove 13 of the bracket 9, the engaging projection 24 automatically turns into an uneven portion ( 12a, 12b) direction.

A spring washer 28 may be further interposed in fastening the butterfly nut 23 to the handle fixing bolt 21 .

As described above, according to the present invention, the concave and convex portions 12a and 12b are formed on the edge of the guide groove 13 of the bracket 9 exposed to the outside, and the concave and convex portions 12a and 12b are formed on the head of the handle fixing bolt 21 . ) to form an engaging protrusion 24 having the same shape as the blade 3, adjust the opening degree of the blade 3, and then fix the handle 15 to the bracket 9 by the handle fixing bolt 21 and the butterfly nut 23. When the engaging protrusion 24 is inserted into the recess of the concave and convex portions 12a and 12b and fixed, the butterfly nut 23 is finely loosened by external factors such as strong wind speed or vibration to change the damper opening. can prevent

3 to 5, in order to prevent the degree of opening of the blade 3 set by the operator from fluctuating due to the installation environment such as strong wind speed and vibration, the horizontal part 19 of the handle 15 A protrusion 20 is formed on the upper surface of the bracket 9, and a plurality of locking projections 11 on which the protrusion 20 is caught are continuously formed on the surface of the bracket 9, so that when the butterfly nut 23 is tightened, the rear surface of the handle The protrusion 20 may be inserted between the locking projections 11 on the surface of the bracket 9 to fix the handle 15 to the bracket 9 .

As described above, according to the present invention, the locking projections 11 are continuously formed on the surface of the bracket 9 exposed to the outside, and the protrusion 20 is formed on the back surface of the handle to hold the handle 15 and rotate the shaft 5a, After adjusting the opening degree of the blade 3 by rotating 5b), when the butterfly nut 23 is fastened, the handle rear protrusion 20 is inserted and fixed between the locking projections 11 on the surface of the bracket 9, Due to external factors such as strong wind speed or vibration, the butterfly nut 23 is finely loosened to prevent the damper opening degree from being changed.

1: housing
3: Blade
5a, 5b: axis of rotation
7a, 7b : shaft cover
9: Bracket
10: opening degree display part
11: jamming jaw
12a, 12b: Concave-convex part
13: guide home
15 : handle
17: grip part
19: horizontal part
20: protruding wall
21: handle fixing bolt
22: bolt head
23: butterfly nut
24: engagement protrusion
25 : sleeve
27: sleeve fixing bolt
28 : spring washer
29: sealed box
31: box body
33: box cover
35a, 35b: packing member
37, 39: hinge
41: locking wing
43: locking home
45: locking projection
47: sealing cap

Claims (3)

A disk-type blade that can open and close the air passing through the housing is installed inside the housing by a rotating shaft passing through the housing, and both ends of the rotating shaft are extended to the outside of the housing, and a handle for manually rotating the blade is attached to one end of the rotating shaft , In the damper, the other end of the rotating shaft protrudes out of the housing,
A sealing box for blocking air flow between the rotating shaft and the housing is provided around the exposed portion of one end of the rotating shaft to which the handle is attached,
The sealed box includes a box body accommodating one end of the rotation shaft exposed part and the handle therein, a first packing member installed to form a closed path along the open surface of the box body, and the first packing member coupled to the box body A damper comprising a box cover provided with a second packing member matching with the locking means and the second packing member is in close contact with the first packing member when the box body is locked by a locking means.
The method of claim 1,
A tunnel-type bracket is provided between the handle and the housing, the surface of which is in contact with the back surface of the handle, and a guide groove forming a curved surface around one end of the rotation shaft is formed in the bracket, and the handle is moved from the inside to the outside of the guide groove. Insert a penetrating handle fixing bolt, and fasten a butterfly nut to the handle fixing bolt to fix the handle and the blade connected to the handle,
An uneven portion is formed on the edge of the guide groove, and an engaging projection protruding in the shape of the uneven portion is formed on the head of the hand holding fixing bolt. Damper, characterized in that it is firmly fixed to the.
The method of claim 1,
A tunnel-type bracket is provided between the handle and the housing, the surface of which is in contact with the back surface of the handle, and a guide groove forming a curved surface around one end of the rotation shaft is formed in the bracket, and the handle is moved from the inside to the outside of the guide groove. Insert a penetrating handle fixing bolt, and fasten a butterfly nut to the handle fixing bolt to fix the handle and the blade connected to the handle,
A protrusion is formed on the back surface of the handle, and a plurality of locking projections on which the projections are caught are continuously formed on the surface of the bracket. A damper, characterized in that it is inserted so that the handle is firmly fixed to the bracket.

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