JP2010265825A - Axial blower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of an axial blower capable of easily replacing only a muffling cylinder at an installation site. <P>SOLUTION: This axial blower is constituted of an air blowing cylinder 3 for mounting a motor 1 and an impeller 2 inside a cylinder, and the muffling cylinder 6 having a muffling hub 5 in a cylindrical casing 4. The air blowing cylinder 3 and the muffling cylinder 6 are fastened by a connecting bolt and a connecting nut by connecting flanges 7 and 8 pushed out to the respective outer peripheral sides. An acute angle hook 9 arranged so as to fold back to the connection mating side, that is, the air blowing cylinder 3 side, is arranged in an upper end part of the connecting flange 7 of the muffling cylinder 6. While, a hooking receiving part 10 is arranged in an upper end part of the connecting flange 8 of the air blowing cylinder 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an axial blower that is installed on a ceiling of an automobile road tunnel and ventilates the inside of the tunnel by a pressure increase caused by a jet.

  The configuration of a conventional axial fan is shown in FIG.

  In the axial blower shown in FIG. 14, a motor 102 is housed in a cylindrical casing 101, and an impeller 103 is attached to the shaft of the motor 102. On the other hand, a fixed hub cone 104 is attached to the cylindrical casing 101 by a support plate 105 on the inflow side of the impeller 103. The motor 102 uses a biaxial motor, and an impeller 103 is attached to each shaft to form a two-stage impeller (Patent Document 1).

Japanese Patent No. 2997257

  In the axial blower having the conventional structure, since the axial blower itself is large and heavy, a large number of bolts connecting the blower cylinder and the silencer cylinder are required. In addition, it is difficult to position the hole through which the connection bolt is passed even when only the silencer cylinder is removed when the silencer cylinder is damaged or the motor is maintained. For these reasons, since it is difficult to attach and detach the silencer tube at the installation site, there is a problem that the blower tube and the silencer tube are integrally removed.

  The present invention provides the structure of an axial blower that can easily replace only the silencer cylinder at the installation site by solving the above problems, reducing the number of connection bolts, and making it easier to determine the hole positions of the connection bolts.

  In order to solve the above-mentioned problems, it is composed of a blower cylinder equipped with an impeller and a motor, and a silencer cylinder provided with a cylindrical casing, and the blower cylinder and the silencer cylinder are fastened by a connection bolt and a connection nut at each connection flange. In the axial blower for road tunnel ventilation, an acute angle hook is provided at the upper part of the connection flange of the silencer cylinder, a hook is provided at the upper part of the connection flange of the air duct, and the acute angle hook of the silencer cylinder is provided. It is characterized by a structure in which it is hooked on the hook portion of the blower cylinder and fixed with a connecting bolt.

  According to the present invention, an acute angle hook is provided at the upper end portion of the connection flange of the silencer tube, a hook receiving portion is provided at the upper end portion of the connection flange of the blow tube, and the acute angle hook of the silencer tube is connected to the hook reception portion of the blow tube. By hooking on, the number of connection bolts used is reduced, and the position of the hole through which the connection bolt is passed is determined, so that the silencer can be attached and detached at the installation site. In addition, since the muffler can be removed from the installation site, maintenance of the impeller and motor in the blower tube can be performed at the installation site. Moreover, if both the silencer cylinders connected before and after the blower cylinder are removed, only the silencer cylinder can be taken back to the factory and overhauled.

Sectional drawing which shows the axial-flow fan which provided the acute angle hook in the silencer cylinder upper end part The figure which shows the axial-flow fan which provided the flat part in the connection flange upper end part of the silencer cylinder, and provided the acute angle hook in the flat part. The figure which shows the axial flow fan which made the connecting flange polygonal and provided the acute angle hook on the polygon flange upper oblique side of the silencer cylinder The figure which shows the axial blower which leveled one side of the lower surface of the polygonal flange of a silencer cylinder The figure which shows the axial blower which provided the acute angle hook in the blower cylinder lower end part The figure which shows the axial-flow fan which provided the flat part in the lower end part of the connection flange of an air pipe, and provided the acute angle hook in the flat part. The figure which shows the axial flow fan which made the connecting flange polygonal and provided the acute angle hook on the polygon flange upper oblique side of the silencer cylinder The figure which shows the axial blower which leveled the one side of the lower surface of the polygon flange of a blower cylinder The figure which shows the axial blower of the structure where the key nail is hooked in the slit hole The figure which shows the axial blower of the structure where a protrusion is inserted in a hole The figure which shows the axial blower which made the height of the base part of the silencer cylinder higher than the height of the base part of the air pipe The figure which shows the axial flow fan of the structure which provided the slide cover in the connection part The figure which shows the axial blower of the structure which provided the handle in the cover The figure which shows the axial flow fan of the conventional structure

  The invention according to claim 1 of the present invention comprises a blower cylinder equipped with an impeller and a motor, and a silencer cylinder provided with a cylindrical casing, and the blower cylinder and the silencer cylinder are connected flanges protruding to the respective outer peripheral sides. In the axial flow fan that is fastened by the connection bolt and the connection nut at the connection flange upper end portion of the muffler tube, an acute angle hook that is folded back to the connection partner side is provided, and the connection flange upper end portion of the air blow tube has the above-mentioned A hook receiving portion for hooking an acute angle hook is provided. The hole position of the connection bolt can be determined by hooking with the acute angle hook on the connection flange of the silencer tube. In addition, the sharp angle hook itself supports the dead weight of the silencer cylinder, and the hook shape is acute angle shape, so that when the acute angle hook is hooked, the silencer cylinder works in the direction of crimping to the blower cylinder. It has the effect that it can be reduced.

(Embodiment 1)
As shown in FIGS. 1 to 4, the axial blower according to Embodiment 1 of the present invention includes a blower cylinder 3 in which a motor 1 and an impeller 2 are mounted inside a cylinder, and a silencer hub 5 in a cylindrical casing 4. It is comprised with the muffler cylinder 6 provided. The blower cylinder 3 and the muffler cylinder 6 are fastened by connection bolts and connection nuts at the connection flanges 7 and 8 protruding to the outer peripheral side of each. An acute angle hook 9 is provided at the upper end of the connection flange 7 of the silencer cylinder 6 so as to be folded back to the connection counterpart side, that is, the blower cylinder 3 side. On the other hand, a hook receiving portion 10 is provided at the upper end portion of the connection flange 8 of the blow tube 3.

  As shown in FIG. 2, part of the upper end portions of the connection flanges 7 and 8 protrude from the upper part of the casing. The protruding portion has a horizontal end. The acute angle hook 9 is provided at the horizontal end portion of the muffler tube 6 and the hook receiving portion 10 is provided at the horizontal end portion of the blower tube 3.

  The operation of the above configuration will be described. The axial blower targeted by the present invention is a large blower having a diameter of about 600 mm or more, and the total weight may be 1 ton or more. When assembling such an axial blower, a large machine such as a crane is used. First, an operation of fixing the blower cylinder 3 and attaching the silencer cylinder 6 to the connection flanges 8 provided before and after the blower cylinder 3 is performed. Next, the acute angle hook 9 provided on the silencer cylinder 6 is lifted above the upper end of the connection flange 8 of the blower cylinder 3. In this state, the muffler 6 is lowered so that the connection flanges 7 and 8 are brought into contact with each other. At this time, the hook 9 is hooked on the hook receiving portion 10 at the upper end of the connection flange 8 of the blower cylinder 3 by the acute angle hook 9 at the upper end of the connection flange 7 of the noise reduction cylinder 6. The acute angle hook 9 supports the dead weight of the silencer cylinder 6 and works in the direction in which the silencer cylinder 6 is crimped to the blower cylinder 3 when the acute angle hook 9 is hooked on the hook receiving portion 10. Can be reduced. Further, the upper end portions of the connection flanges 7 and 8 are leveled to secure a distance to which the acute angle hook 9 is hooked to support the dead weight of the silencer cylinder 6.

  Moreover, as shown in FIG. 3, it is good also as a structure which polygonizes the shape of a connection flange so that it may protrude from a casing, and provides the acute angle hook 9 in the two oblique sides of the polygon flange 11 upper part of a silencer cylinder. The blow tube 3 is provided with a catch receiving portion 10 on the oblique side corresponding to the side on which the acute angle hook 9 is provided.

  In this case, vertical and horizontal positioning is possible by engaging the two oblique acute angle hooks 9 and the hook receiving portions 10 corresponding to them. That is, the position of the hole through which the connecting bolt is passed can be easily adjusted.

  Also, as shown in FIG. 4, by providing a horizontal portion in which the bottom of the polygonal flange 11 is horizontal, it is possible to prevent the silencer 6 provided with the cylindrical casing 4 from rolling.

  As described above, since the assembly of the blower cylinder 3 and the silencer cylinder 6 can be easily performed, the silencer cylinder 6 can be attached and detached at an actual installation site. Further, since the muffler cylinder 6 can be detached from the installation site, maintenance of the motor 1 and the impeller 2 in the blower cylinder 3 can be performed at the installation site. Moreover, since the silencer cylinder does not roll, the safety of the attaching / detaching work is improved. Moreover, if both the silencer cylinders 6 connected before and after the blower cylinder 3 are assembled, only the silencer cylinder 6 is brought back to the factory, and an axial blower capable of overhauling is obtained.

(Embodiment 2)
As shown in the sectional view of the axial blower of FIG. 5, an acute angle hook 9b is provided at the lower end portion of the connection flange 8 of the blower cylinder 3 so as to be folded back to the connection counterpart side, that is, the silencer cylinder 6 side. A hook receiving portion 10b is provided at the lower end of the connection flange 7 of the tube 6.

  Further, as shown in FIG. 6, a part of the lower end portions of the connecting flanges 7 and 8 are protruded to the outside of the cylindrical casing, and the protruding end portions are horizontal. An acute-angle hook 9 b is provided at the horizontal end of the protruding blower cylinder 3, and a hook receiving part 10 b is provided at the horizontal end of the silencer cylinder 6.

  With the above configuration, when the axial fan is assembled, the blower cylinder 3 is fixed and the muffler cylinder 6 is lifted in the same manner as in the first embodiment. After the connecting flanges 7 and 8 are in contact with each other, the muffler 6 is lowered. At that time, the hook receiving portion 10 b of the silencer cylinder 6 is hooked on the acute angle hook 9 b of the blower cylinder 3. The acute angle hook 9b supports the dead weight of the sound deadening cylinder 6, and since the hook shape is an acute angle shape, the sound deadening cylinder 6 works in a direction in which the sound deadening cylinder 6 is crimped to the blower cylinder 3 by hooking the hook receiving portion 10b on the acute angle hook 9b. The number of connecting bolts can be reduced.

  Further, since the bottom of the polygonal flange 12 of the blower cylinder 3 is horizontal, the blower cylinder 3 provided with the cylindrical casing is prevented from rolling.

  Further, as shown in FIG. 7, the connecting flanges 7 and 8 are polygonal so as to protrude from the cylindrical casing, and an acute angle hook 9b is provided on the hypotenuse on the lower side of the polygonal flange 12 of the blower cylinder, You may provide the hook receiving part 10b in the hypotenuse of the polygon flange 11 lower part.

  Moreover, as shown in FIG. 8, you may provide the horizontal part (polygon flange horizontal part 13) which horizontalized the polygon flange 12 bottom of the ventilation cylinder.

  In this case, vertical and horizontal positioning is possible by engaging the two oblique acute angle hooks 9b and the corresponding hook receiving portions 10b. That is, the position of the hole through which the connecting bolt is passed can be easily adjusted, the work for attaching and detaching the silencer cylinder 6 at the installation site is facilitated, and an axial blower with easy maintenance can be obtained.

  In addition, since the blower cylinder does not roll, an axial blower with improved safety of attachment / detachment work can be obtained.

(Embodiment 3)
FIG. 9 is a front view of a blower cylinder and a side view of a muffler cylinder of an axial blower according to a third embodiment of the present invention.

  In the axial blower of the third embodiment, a key claw 15 having a tapered shape in which the tip extends downward and the tip is narrowed is formed on the connection flange 7 of the silencer tube. The connection flange 8 is provided with a slit hole 16 into which a key claw is fitted.

  With the above-described configuration, the key claw 15 serves as a stopper by inserting and hooking the key claw 15 of the connection flange 7 of the silencer cylinder 6 into the slit hole 16 of the connection flange 8 of the blower cylinder 3. Therefore, since the positional relationship between the blower cylinder 3 and the muffler cylinder 6 in the vertical direction is determined, the position of the hole through which the connection bolt is passed can be determined. Further, since the key claw 15 itself can support the dead weight of the silencer cylinder 6 and the tip of the key claw 15 has a tapered shape, the silencer cylinder 6 works in a direction in which the silencer cylinder 6 is crimped to the blower cylinder 3. The number can be reduced.

  As a result, the number of connection bolts used is reduced, and the position of the hole through which the connection bolt is passed is determined. This makes it easy to attach and detach the silencer cylinder 6 at the installation site, and an axial blower with easy maintenance can be obtained.

(Embodiment 4)
FIG. 10 is a front view of a blow cylinder and a side view of a muffler cylinder of an axial blower according to a fourth embodiment of the present invention.

  In the axial blower of the fourth embodiment, the connection flange 7 of the muffler cylinder is provided with a projection 17 having a cylindrical shape near the root and a truncated cone shape at the tip, and the connection flange 8 of the blow cylinder has a projection root. A hole 18 having the same size as the outer periphery in the vicinity is provided, and the protrusion 17 is inserted into the hole 18.

  According to the above configuration, the tip of the projection 17 of the connection flange 7 of the silencer cylinder has a truncated cone shape, so that the projection 17 can be easily inserted into the hole 18 of the connection flange 8 of the blower cylinder. Since the hole position of the connection bolt is determined by being inserted into 18, and the protrusion 17 itself supports the weight of the silencer 6, the number of connection bolts can be reduced.

  As a result, the number of connection bolts to be used is reduced, so that the work of attaching and detaching the silencer cylinder 6 at the installation site is facilitated, and an axial blower with easy maintenance is obtained.

(Embodiment 5)
FIG. 11 is a side view of an axial blower according to the fifth embodiment of the present invention.

  In the axial blower of the fifth embodiment, the height of the blow tube pedestal portion 19 is made lower than the height of the silencer tube pedestal portion 20, and the height H of the acute angle hook 9 is set to be the same as that of the silencer tube pedestal portion 20. The structure is made shorter than the height difference h of the blow tube pedestal 19.

  With the above configuration, when the muffler 6 is mounted on the lifting platform in the state where the blower tube 3 is suspended, the blower tube pedestal 19 does not hit the lift and the acute angle hook 9 is silenced. The tube 6 and the blow tube 3 can be attached and detached without interfering with the polygonal flanges 11 and 12 of the blow tube 3.

  This eliminates the need for a dedicated stand for attaching and detaching work, and thus the attaching and detaching work of the silencer cylinder 6 at the installation site is facilitated, and an axial blower with easy maintenance can be obtained.

(Embodiment 6)
As shown in FIGS. 12-13, the axial-flow fan in the 6th Embodiment of this invention provides the cylindrical cover 21 so that the connection flange provided in the silencer cylinder 6 and the ventilation cylinder 3 may be covered, and is connected. The slide cover 22 is provided so as to open and close the connecting portion of the flange.

  Further, as shown in FIG. 13, the slide cover 22 is provided with a handle 23.

  With the above configuration, the connection bolt is located inside the slide cover 22, so that the connection bolt and the connection nut itself can be prevented from being exposed to the external environment, and the attachment / detachment operation can be performed simply by sliding the slide cover 22. .

  Further, since the handle 23 can be grasped when the slide cover 22 is slid, the slide cover 22 can be slid more strongly.

  Thus, corrosion of the connection bolt and the connection nut can be suppressed, safety can be improved, and an axial blower that can be attached / detached only by sliding the slide cover 22 at the time of attachment / detachment is obtained. In addition, since the slide cover 22 has the handle 23, the slide cover can be easily slid, so that an attaching / detaching workability is improved and an axial blower with easy maintenance can be obtained.

  The present invention can be used for a blower, a pump, or the like that requires equivalent performance during forward rotation and reverse rotation.

DESCRIPTION OF SYMBOLS 1 Motor 2 Impeller 3 Blower cylinder 4 Cylindrical casing 5 Silencer hub 6 Silencer cylinder 7 Connection flange (of the silencer cylinder) 8 Connection flange 8 (of the cylinder) 9 Acute angle hook 9b Acute angle hook 10 Hook receiving part 10b Hatch receiving part 11 ( Polygon flange (of the silencer cylinder) 12 Polygon flange (of the blower cylinder) 13 Polygon flange horizontal part (of the silencer cylinder) 14 Polygon flange horizontal part (of the blower cylinder) 15 Key claw 16 Slit hole 17 Protrusion 18 Hole 19 Blower Tube base 20 Silencer tube base 21 Cover 22 Slide cover 23 Handle

Claims (13)

It is composed of a blower cylinder equipped with an impeller and a motor, and a silencer cylinder provided with a cylindrical casing, and the blower cylinder and the silencer cylinder are fastened by connection bolts and connection nuts at connection flanges protruding to the outer peripheral side of each. In the air blower, a shaft provided with an acute angle hook that is folded back to the connection partner side at the upper end of the connection flange of the muffler tube, and provided with a hook receiving portion for hooking the acute angle hook at the upper end of the connection flange of the air blow tube Current blower. The axial-flow fan according to claim 1, wherein an upper end portion of the connection flange provided in the blower cylinder and the silencer cylinder is leveled, and the acute angle hook is provided in a horizontal portion on the silencer cylinder side. 2. The axial flow according to claim 1, wherein the shape of the connection flange is a polygon, and the acute angle hook is provided on a hypotenuse on the flange upper part on the silencer side, and a hook receiving part is provided on the hypotenuse on the flange upper part on the blower cylinder side. Blower. The axial flow blower according to claim 3, wherein the silencer cylinder and the polygonal flange provided on the blow cylinder have a structure in which one side of the lower part is horizontal. The axial blower according to claim 1, wherein an acute angle hook is provided at a lower end portion of the connection flange of the blower tube, and a hook receiving portion is provided at a lower end portion of the connection flange of the silencer tube. . The axial-flow fan according to claim 5, wherein a lower end portion of the connection flange provided in the blower tube and the muffler tube is made horizontal, and the acute angle hook is provided in a lower end horizontal portion on the blower tube side. The shape of the connection flange is a polygon, and the acute angle hook is provided on a hypotenuse on the lower end of the flange on the blower cylinder side, and a hook receiving part is provided on the hypotenuse on the lower end of the flange on the silencer cylinder side. Axial blower. The axial flow blower according to claim 7, wherein a polygonal flange provided on the silencer cylinder and the blower cylinder has a structure in which one side of a lower end portion is horizontal. A slit hole in which a key claw having a tapered shape in which the tip extends downward and the tip is narrowed is erected on the connection flange of the silencer cylinder, and the key claw is fitted to the connection flange of the blower cylinder The axial-flow fan according to claim 1, wherein The connection flange of the muffler tube is provided with a projection having a cylindrical shape near the root and a truncated cone shape, and the connection flange of the blower tube is provided with a hole having the same size as the outer periphery near the root of the projection. The axial-flow fan according to claim 1, wherein the protrusion is inserted into the hole. It features a structure in which the height of the blow tube pedestal is lower than the height of the silencer tube pedestal, and the height of the acute angle hook is shorter than the difference between the height of the silencer tube pedestal and the blower tube pedestal. The axial blower according to claim 1. The axial-flow fan according to claim 1, wherein a cylindrical cover is provided so as to cover a connection flange provided on the silencer cylinder and the blower cylinder, and a slide cover is provided so that a connection portion of the connection flange can be opened and closed. The axial flow fan according to claim 12, wherein a handle is provided on the slide cover.

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