JP3886276B2 - Vibration isolation structure for ventilation cylinder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration isolating structure for a ventilation cylinder using a damping plate, and in particular, a heat-resistant elastic material such as heat-resistant silicone rubber or fluorine rubber is provided at the outer peripheral position of a rod member provided at the trunk edge angle. The present invention relates to a novel improvement for reducing the transmission of vibrations from the ventilation cylinder to the exterior plate and enhancing the soundproofing effect by connecting the support angle and the trunk edge angle via an elastic material.
[0002]
[Prior art]
Conventionally, the structure shown in FIG. 6 has been adopted as an example of the vibration isolating structure of this type of ventilation cylinder. That is, what is indicated by reference numeral 1 in FIG. 6 is a ventilation cylinder made of a duct or the like. The ventilation cylinder 1 is provided with a soundproofing material 2 such as rock wool, and through a fixed angle 3. A support angle 4 is attached. An outer plate 7 made of a damping plate is attached to a trunk edge angle 5 provided on the support angle 4 via a drilling screw 6. Therefore, by using a damping plate for the exterior plate 7, vibration and sound transmission from the ventilation cylinder 1 are prevented.
[0003]
[Problems to be solved by the invention]
Since the conventional vibration-proofing structure of the ventilation cylinder is configured as described above, the following problems exist. That is, since the exterior plate is directly connected to the fixed angle and the support angle provided on the ventilation cylinder via the trunk edge angle, the solid sound generated in the ventilation cylinder is transmitted to the exterior plate, and the sound insulation effect is obtained. It was supposed to decline. Moreover, although the structure using a vibration isolator is proposed by Japanese Utility Model Publication No. 1-18198, it is impossible to ensure heat resistance because it is natural rubber, neoprene rubber or nitrile rubber.
[0004]
The present invention has been made to solve the above-described problems, and in particular, a heat-resistant elastic material is provided at the outer peripheral position of a rod member provided on the trunk edge angle, and the support angle and the cylinder are interposed via the heat-resistant elastic material. It is an object of the present invention to provide a vibration isolation structure for a ventilation cylinder that reduces the transmission of vibrations from the ventilation cylinder to the exterior plate and enhances the soundproofing effect by connecting the edge angles.
[0005]
[Means for Solving the Problems]
The vibration isolation structure of the ventilation cylinder according to the present invention is provided with an exterior plate made of a vibration damping plate through at least a support angle and a trunk edge angle with respect to the ventilation cylinder, and from the ventilation cylinder to the exterior plate. In the vibration isolating structure of the ventilation cylinder designed to prevent the transmission of vibration, a rod member provided at the trunk edge angle, the longitudinal direction of which is perpendicular to the plate surface direction of the exterior plate, and the support angle And a through hole is provided, a holding plate in which the bar member is passed through the through hole in a non-contact state, and disposed on both sides of the holding plate, and provided at an outer peripheral position of the bar member. A pair of heat-resistant elastic materials sandwiched between a pair of washers and nuts provided at both ends of the rod member and the holding plate, and an outer peripheral position of the heat-resistant elastic material. Located and said supporting ang A cylindrical or plate-shaped guide member that prevents deformation of the heat-resistant elastic material, and the trunk edge angle includes the rod member, the washer and the nut, and the pair of heat-resistant elastic materials. In this structure, the support angle is indirectly connected to the support angle via a holding plate and a guide member.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a vibration isolating structure for a ventilation cylinder according to the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected and demonstrated to a part the same as that of a prior art example, or an equivalent part.
In FIG. 1, reference numeral 1 denotes a ventilation cylinder (here, a ventilation cylinder) used as equipment, ducts, and large-diameter pipes used in facilities such as power plants, petroleum, petrochemicals, and chemical factories. However, the ventilation cylinder 1 is provided with a support angle 4 either directly or via a fixed angle (not shown). ing. The support angle 4 is provided with a pair of guide members 10 made of metal having a cylindrical shape or a plate shape by welding or the like, and a holding plate having a through hole 11a at a position between the guide members 10. 11 hangs down and is provided on the support angle 4.
[0007]
In the through hole 11a, there is disposed a rod member 12 made of a bolt or a screw rod having a screw only at the tip in a non-contact state with the through hole 11a. A trunk edge angle 5 having a configuration in which an exterior plate 7 made of a damping plate is mounted by a drilling screw 6 is attached by welding 6a or the like.
[0008]
At the outer peripheral position of the bar member 12, a heat-resistant elastic material 13 having a cylindrical shape or a plate shape is provided in a state where it does not directly contact the bar member 12 and is in contact with the holding plate 11 and the guide member 10. The both ends of each heat-resistant elastic material 13 are sandwiched between a pair of washers 14 and 15 provided at both ends of the rod member 12. One washer 14 is fastened by a nut 16 screwed into the end of the bar member 12, and each heat-resistant elastic material 13 is held at the outer peripheral position of the bar member 12. The heat-resistant elastic material 13 is, for example, a well-known silicone rubber or fluorine rubber. The heat-resistant elastic material 13 has cold resistance and heat resistance in the range of −50 ° C. to + 180 ° C. Other heat resistant elastic materials may be used. it can.
[0009]
Therefore, in the configuration of FIG. 1, vibration (sound) from the ventilation cylinder 1 is transmitted from the support angle 4 to each heat-resistant elastic material 13 through the holding plate 11 and / or the guide member 10 and effectively absorbed. The vibration that cannot be completely absorbed by the heat-resistant elastic material 13 is transmitted to the trunk edge angle 5 and the exterior plate 7 through the rod member 12, and the exterior can be selected by suitably selecting the elastic coefficient of the heat-resistant elastic material 13. Vibration transmission to the plate 7 can be effectively prevented. In the configuration of FIG. 1, the support angle 4 and the trunk edge angle 5 are connected so that vibration is transmitted indirectly through the heat-resistant elastic material 13, and the longitudinal direction of the bar member 12 and the plate of the exterior plate 7 are connected. The surface direction A is orthogonal to each other. In some cases, the guide member 10 is not used.
[0010]
Next, in the case of the other embodiment shown in FIG. 2, unlike the configuration in which the bar member 12 is horizontally provided as shown in FIG. 1, the configuration in which the sound insulation arranged vertically is desired to be performed completely. This is used for sound insulation as in the case of, and the heat resistant elastic material 13 is arranged on both sides of the support angle 4 so that the support angle 4 and the trunk edge angle 5 are directly connected by the heat resistant elastic material 13. In addition, a heat-resistant elastic washer 30 is provided between the trunk edge angle 5 and the rod member 12. The longitudinal direction of the bar member 12 and the plate surface direction A of the exterior plate 7 are parallel to each other, and the same parts as those in FIG.
[0011]
Further, in the case of another embodiment shown in FIG. 3, it is a configuration in which a sound insulation effect is increased to some extent, and a configuration in which the heat-resistant elastic material 13 is directly provided between the support angle 4 and the trunk edge angle 5. Since this part is the same as that of FIG. 2, the other description is omitted.
[0012]
In addition, in the case of the other embodiments shown in FIGS. 2 to 4, the case where the anti-vibration effect is provided is shown. The heat-resistant elastic material 13 having a thickness smaller than that of the configuration of FIG. Since the guide member 10 is directly provided between the edge angle 5 and the other parts are the same as those in FIG. 3, the other description is omitted.
[0013]
5 is provided with a thin heat-resistant elastic material 13 similar to FIG. 4 directly between the support angle 4 and the trunk edge angle 5, and the longitudinal direction of the bar member 12 is the plate surface direction A of the exterior plate 7. It is the structure made into orthogonal, The same code | symbol is attached | subjected to the part same as the above-mentioned form, and the description is abbreviate | omitted.
[0014]
In the above description, an existing pipe angle material, bolt, plate material, or the like is used, but it goes without saying that a structure having the same function can be made of a casting or the like.
[0015]
FIG. 7 is a graph showing the results of experiments on the effect of vibration isolation using the configuration of FIGS. 1 and 2 according to the present invention and the configuration of the conventional FIG. The special vibration isolation structure A according to the present invention is superior to the conventional vibration isolation structure D in the standard vibration isolation B and the simple vibration isolation C in all frequency bands.
[0016]
【The invention's effect】
Since the vibration isolating structure for the ventilation cylinder according to the present invention is configured as described above, the following effects can be obtained. That is, the support angle and the trunk edge angle are separated, and the support angle and the trunk edge angle are indirectly connected via the heat-resistant elastic material at the outer peripheral position of the rod member provided on the trunk edge angle side. In spite of its inexpensive structure, it is possible to obtain effective vibration isolation with better sound insulation than in the past.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a vibration isolating structure of a ventilation cylinder according to the present invention.
FIG. 2 is a cross-sectional view showing another embodiment of FIG.
FIG. 3 is a cross-sectional view showing another embodiment of FIG. 2;
4 is a cross-sectional view showing another embodiment of FIG. 3;
FIG. 5 is a cross-sectional view showing another embodiment of FIG. 1;
FIG. 6 is a configuration diagram showing a vibration isolation structure of a conventional ventilation cylinder.
FIG. 7 is a comparison characteristic diagram of frequency versus transmitted sound pressure level in the present invention and a conventional vibration-proof structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ventilation cylinder 4 Support angle 5 Body edge angle 7 Exterior plate A Plate surface direction 10 Guide member 11 Holding plate 12 Bar member 13 Heat-resistant elastic material 14, 15 Washer 16 Nut

Claims (1)

Provided to the ventilation cylinder (1) is an exterior plate (7) made of a damping plate via at least a support angle (4) and a trunk edge angle (5), and the exterior cylinder (1) to the exterior In the vibration isolation structure of the ventilation cylinder designed to prevent transmission of vibration to the plate (7),
A rod member (12) provided at the trunk edge angle (5) and having a longitudinal direction orthogonal to the plate surface direction (A) of the exterior plate (7) ;
A holding plate (11) provided in the support angle (4) and provided with a through hole (11a) , and the bar member (12) is passed through the through hole (11a) in a non-contact state ,
It is arranged on both sides of the holding plate (11) , and is provided at the outer peripheral position of the rod member (12) to form a cylinder or plate shape, and a pair provided at both ends of the rod member (12) A pair of heat-resistant elastic members (13) sandwiched between the washers (14, 15) and nuts (16) and the holding plate (11) ,
A cylindrical or plate-shaped guide member (10) which is located at the outer peripheral position of the heat-resistant elastic material (13) and provided at the support angle (4) and prevents the heat-resistant elastic material (13) from being deformed.
With
The trunk edge angle (5) includes the rod member (12) , the washers (14, 15) and a nut (16) , the pair of heat-resistant elastic members (13) , a holding plate (11) and a guide. A vibration isolating structure for a ventilation cylinder, which is indirectly connected to the support angle (4) via a member (10) .

Images