JP2010078146A - Vibration damping flexible pipe unit and vibration damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration damping flexible pipe unit and a vibration damper, capable of surely performing the construction which is hard to generate the vibration and the noise in the specific construction spot in a short time. <P>SOLUTION: There are provided a metal flexible pipe 12 which forms a long concave-convex part over the face in one direction and a vibration damper 14 which can move in the longitudinal direction of a pipe freely while fitting detachably to the metal flexible pipe 12 and having at least one adhesion part 20 in the condition of outside fitting. The vibration damper 14 has a non-contact part or a clearance H to the pipe face at least in a part in the fitting condition over the metal flexible pipe 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vibration damping flexible pipe device and a vibration attenuator for a metal flexible pipe for fluid conveyance having a vibration damping function.

  Conventionally, metal flexible pipes for fluid conveyance are known. This metal flexible tube has a low attenuation capability against noise and vibration unlike metal such as rubber. In addition, since the inner surface of the metal flexible tube has a shape with continuous wrinkles, noise and vibration are likely to occur due to the flow of gas or liquid inside the tube, compared to a rubber hose having a smooth inner surface. For this reason, depending on the use place and use conditions of a residential area, a school, a laboratory, etc., those noises and vibrations may become a problem. As a method for reducing noise and vibration when they occur, for example, there is a method of winding a soundproof mat or the like over the entire outside of the metal flexible tube or over a certain length. However, the method of winding the soundproof mat around the outer periphery of the metal flexible tube cannot be used in an environment such as a clean room or a high temperature state. In addition, there is a problem that a lot of work and materials are required for the work of winding the soundproof mat or the like over the entire length or a certain length, the soundproof work cost is increased, and the work time is long. On the other hand, the flexible pipe with a vibration suppression function of patent document 1 is proposed.

JP 2001-32884 A

  In the above Patent Document 1, a pipe is disposed on the outer periphery of a flexible pipe, and a vibration suppressing body made of, for example, a viscoelastic material is provided between the pipe and the flexible pipe. In the flexible pipe of this Patent Document 1, as shown in FIGS. 1 and 2, the flexible pipe is inserted in advance from one end opening of the pipe, and thereafter, an elastic material or the like is filled between the pipe and the flexible pipe without any gap from the both end openings. Is. However, the vibration and noise around the flexible pipe have complicated elements such as the length of the flexible pipe at the specific installation site, bending, connected equipment, vibration generation system, and the like. It is difficult to effectively suppress noise by simply installing a part with a pipe and an elastic material. In addition, in this Patent Document 1, it is necessary to insert a flexible tube in advance from one end opening of the pipe at the time of construction, and then to fill the elastic material from both end openings of the pipe. In addition, it is extremely difficult to adjust the amount of the elastic material to be filled by such a method, and it takes a considerable time until it is confirmed that a noise suppression effect is obtained at a specific construction site. is there.

  The present invention has been made in view of the above-described conventional problems, and one object thereof is an extremely simple configuration and low cost, and it is difficult to generate vibration and noise in a specific construction site in a short time. An object of the present invention is to provide a vibration damping flexible pipe device and a vibration attenuator that can be reliably constructed.

  In order to achieve the above object, the present invention has a metal flexible tube 12 formed by repeatedly forming uneven portions 16 and 18 on the surface and extending in one direction, and a metal flexible tube 12 that is detachably fitted and fitted externally. The vibration attenuating flexible tube device 10 to 10-6 includes the vibration attenuators 14 to 14-6 which have at least one close contact portion x1 in the state of being slidable in the longitudinal direction 100 of the tube. . The present invention provides means for arbitrarily changing the natural frequency and vibration mode of a metal flexible pipe by attaching a vibration attenuator as a weight body at one or a plurality of positions in the length direction of the metal flexible pipe. Not only metal, but an object has a specific frequency according to its mass distribution and stiffness distribution. Noise and vibration generated by the flow of gas or liquid inside the metal flexible pipe are generated by transmitting the vibration or pulsation of the prime mover, etc., which has its own vibration element, such as a pump, and metal flexible There is a self-excited vibration generated by a vortex or the like in which fluid flows in the pipe. When these vibration frequencies are equal to or close to the natural frequency of the metal flexible tube, resonance and resonance occur, and noise and vibration are amplified. Since the metal flexible tube can be bent freely and its shape can be changed, it is used by being deformed into various shapes according to the installation space. For this reason, even if it is a metal flexible pipe of the same length, a natural frequency and a vibration mode change with use places and use conditions, and it is difficult to predict resonance and resonance phenomena in advance. In the present invention, a vibration attenuator that can be easily detachably fitted to the flexible tube by an external operation and is slidable in the longitudinal direction of the tube in the externally fitted state is attached to the flexible tube. It is possible to easily set an attachment position where the damping capacity of the flexible pipe can be exhibited most highly, and to complete the vibration and noise suppression construction work in a short time. This eliminates the need to change the length of the metal flexible tube or manufacture the metal flexible tube at the site if noise and vibration are unacceptable in the usage environment. The vibration attenuator may be formed of a cylindrical outer fitting that is detachably fitted to the metal flexible tube, and has a certain length in the axial direction, and It is good also as a circular arc body or circular arc board shape provided with the notch which continued in the axial direction and formed in the cross-sectional C-shape as a whole. By using a circular arc body having a C-shaped cross-section as a whole with notches that are continuous in the axial direction, the metal flexible pipe can be attached and detached by a pressing operation in a direction substantially perpendicular to the pipe axis. It is possible to maintain the mounting workability at the work site well.

  The vibration attenuators 14 to 14-6 may be made of a fitting body having a non-contact portion or a gap H with respect to the surface of the flexible tube at least partially in a state of being fitted on the metal flexible tube 12. It has been experimentally verified that the vibration damping function is low in the fully contacted state. When the metal flexible tube has a non-contact portion or a gap portion, the contact portion between the vibration attenuator 14 and the tube 12 slips slightly, or the portion at a position sufficiently separated from the tube surface is a close contact portion. This type of vibration causes different types of vibration depending on the delay and contact form, and as a result, improves the damping capacity of the tube 12.

  In addition, the vibration attenuators 14 to 14-6 are fitted so as to move freely in the longitudinal direction of the metal flexible tube 12 by an external force without being dropped due to their own weight when the metal flexible tube 12 is erected. Good.

  The vibration attenuators 14 to 14-5 may be externally fitted to the metal flexible tube by an operation on the metal flexible tube directed in a direction intersecting the axis 100 direction of the metal flexible tube 12. Specifically, in a form in which a part of a cylindrical member such as a C-shape is cut out in the axial direction, the fitting operation is performed by pressing in a perpendicular direction.

  The vibration attenuators 14 to 14-2, 14-4, and 14-5 may include incomplete cylindrical bodies 15 to 15-2, 15-4, and 15-5 having an axial notch.

  Moreover, the vibration attenuator 14-1 is good to be provided with the connection part 33 which connects those incomplete cylindrical bodies 38 and 39 and those incomplete cylinders so that those cylindrical shafts 100 can bend freely. The plurality of incomplete cylinders include those having various sizes in the axial direction and incomplete cylinders having a short axial length. It is good also as a structure formed by repeating the incomplete cylindrical body of short axial direction length in a connection part.

  Moreover, it is preferable that the vibration dampers 14, 14-1, 14-6 themselves are elastically deformed and can be freely attached to and detached from the metal flexible tube 12. Make operations such as axial movement easier.

  Moreover, it presses in the direction substantially orthogonal to the flexible tube axis | shaft 100, detachably fits on the outer surface of the vibration attenuators 14, 14-1, 14-2, 14-5, and the vibration attenuator 14 is elastic to the flexible tube. It is preferable to provide a reinforcing wire 40 that is urged in the close contact direction.

  The vibration attenuator 14-3 may be a clip device having open / close members 42 and 44 that are spring-biased in the clamping direction and are detachably fitted to the outer periphery of the metal flexible tube 12.

  The vibration attenuator 14-4 includes a hollow solid arcuate body 50 that is detachably fitted to the outer periphery of the metal flexible tube 12, and the hollow solid arcuate body is formed in the hollow portion through an opening with a plug 54. You may make it make liquid or a granular material throw in freely.

  In addition, the vibration attenuator 14-6 may include a coil spring member 60 that is detachably fitted to the outer periphery of the metal flexible tube 12.

  Moreover, this invention is comprised from the vibration attenuator 14-14-6 used for the vibration attenuating flexible tube apparatus 10-10-6 in any one of Claim 1 thru | or 10.

  According to the vibration-damping flexible tube device of the present invention, a metal flexible tube having a concavo-convex portion formed repeatedly on one surface in a long direction and at least one in a state of being detachably fitted to and fitted to the metal flexible tube. Since it has a close-contact part and a vibration attenuator that can move in the longitudinal direction of the pipe, it is very simple and low-cost, and it can vibrate at a specific construction site in a short time. Construction can be performed with a reliable installation position that is less likely to cause noise. Therefore, it is not necessary to separately perform construction work caused by vibration and noise, or to perform construction work again, and work efficiency can be improved.

  Further, since the vibration attenuator is configured to be a fitting body having a non-adhered portion or a gap with respect to the surface of the flexible tube at least partially in a state of being fitted to the metal flexible tube, the vibration damper is externally attached to the metal flexible tube. It is the structure fitted and attached, and the vibration of the metal flexible pipe | tube 12 can be attenuate | damped effectively.

  In addition, the vibration attenuator is configured so that it does not fall under its own weight when the metal flexible tube is erected, but is externally fitted to move in the longitudinal direction of the metal flexible tube. Thus, it is possible to simultaneously realize a simple outer fitting configuration, a configuration that is movable in the longitudinal direction of the metal flexible tube, and a configuration that has a gap or a non-contact portion to ensure a vibration damping function.

  Moreover, since the vibration attenuators 14 to 14-5 are configured to be externally fitted to the metal flexible pipe by an operation on the metal flexible pipe directed in a direction intersecting the axis 100 direction of the metal flexible pipe 12. Adjustment work for vibration damping can be performed after construction of the flexible pipe, and work efficiency can be improved by performing vibration damping work regardless of the progress of construction work.

  Moreover, since the vibration attenuator has a configuration including an incomplete cylindrical body having an axial cutout, a removable external fitting configuration for the metal flexible tube, and a configuration movable for the longitudinal direction of the metal flexible tube are provided. Realize at the same time, and contribute to the weight reduction and simplification of the structure.

  In addition, the vibration attenuator has a structure that includes a plurality of incomplete cylinders and a connecting portion that connects the incomplete cylinders so that the cylinder axes can be freely bent. When bending and installing a metal flexible pipe, the vibration attenuator can be fitted externally.

  Further, the structure of the vibration attenuator itself can be elastically deformed so that it can be freely attached to and detached from the metal flexible tube, thereby simplifying the structure and reducing the weight.

  Further, by providing a reinforcement wire that is fitted along the outer surface of the vibration attenuator and is pressed in a direction substantially orthogonal to the flexible tube axis, the vibration damping main body is a molded product made of, for example, a synthetic resin. The vibration attenuator can be securely fitted to the flexible pipe by reinforcing the fitting force. Therefore, the vibration attenuator can be produced at a low cost.

  The vibration attenuator is composed of a clip device having an opening / closing member that is spring-biased in the clamping direction and is detachably fitted to the outer periphery of the metal flexible tube. In addition, the vibration damping work can be performed, and the external fitting operation is also easy, and the damping adjustment operation can be easily performed.

  The vibration attenuator is a hollow solid arc body that is detachably fitted to the outer periphery of a metal flexible tube, and the hollow solid arc body can be freely inserted into and removed from the hollow portion through an opening with a stopper. Because it is a structure that throws in granules, the increase and decrease of the mass of the vibration attenuator can be finely adjusted, and the mass of the vessel and the longitudinal direction position of the flexible tube that can most effectively exert the attenuator function can be accurately adjusted. It is possible to set.

  Further, since the vibration attenuator 14-6 is composed of a coil spring member 60 that is detachably fitted on the outer periphery of the metal flexible tube 12, the entire vibration attenuator and the one-turn portion of the coil itself are stretchable and flexible. Therefore, vibration damping adjustment can be specifically performed because the metal flexible tube can be easily fitted according to the state of attachment at the construction site of the metal flexible tube and can also move in the axial direction.

  Moreover, since this invention is comprised from the vibration attenuator 14-14-6 used for the vibration attenuating flexible tube apparatus 10-10-6 in any one of Claim 1 thru | or 10, it is a vibration attenuator about each. By taking advantage of the above configuration, vibration damping of the metal flexible tube can be performed.

1 is a perspective configuration diagram of a vibration-damping flexible tube device according to a first embodiment of the present invention. 1 is an end view of the device. (A) is an end face of the vibration attenuator of the apparatus of FIG. 1 and an operation explanatory view thereof, and (b) is a plan view thereof. FIG. 2 is a perspective explanatory view showing a metal flexible tube and a vibration attenuator separated from the apparatus of FIG. 1. (A) is a top view of the vibration attenuator of the vibration attenuating flexible tube apparatus of 2nd Embodiment, (b) is the side view. FIG. 6 is an explanatory perspective view of the vibration attenuator of FIG. 5. It is a perspective explanatory view of a vibration attenuator of a vibration attenuating flexible tube device of a 3rd embodiment. It is a perspective explanatory view of a vibration attenuator of a vibration attenuating flexible tube device of a 4th embodiment. FIG. 9 is an explanatory perspective view of a state in which the vibration attenuator of FIG. 8 is externally fitted to a metal flexible pipe. It is a perspective explanatory view of a vibration attenuator of a vibration attenuating flexible tube device of a fifth embodiment. It is a perspective explanatory view of a vibration attenuating flexible pipe device of a 6th embodiment. It is a perspective view of the vibration attenuator of the vibration attenuation flexible tube apparatus of 7th Embodiment. It is a partial longitudinal cross-sectional explanatory drawing which showed only the vibration attenuator of the vibration attenuating flexible tube apparatus of 7th Embodiment in the cross section. It is action explanatory drawing seen from the end surface side at the time of mounting operation of the coil spring of FIG. 12 to metal flexible pipes. (A) is a partial longitudinal cross-sectional explanatory drawing which shows the example which used the other coil spring member in the vibration attenuator of FIG. 12, 13, (b) is a perspective view of the coil spring member. It is effect | action explanatory drawing which shows the example of mounting | wearing operation to the metal flexible pipe | tube of the coil spring member of FIG.15 (b). It is a table | surface which shows the noise value of an Example.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. 1 to 4 show a first embodiment of the present invention. The vibration damping flexible tube device 10 of the present embodiment includes a metal flexible tube 12 and a vibration attenuator 14 and is configured by a circular arc body having a C-shaped cross section. A vibration attenuator of the type that can be detachably fitted by a pressing operation in a substantially orthogonal direction is provided.

  1 and 4, the metal flexible pipe 12 is an important part of a fluid conveyance piping system for liquids and gases, for example, for changing the direction of piping during fluid conveyance, absorbing pipe misalignment, absorbing vibration, and absorbing expansion and contraction. Used for. The metal flexible tube 12 is formed of a hollow cylindrical metal bellows tube with a ridge formed on the surface with the concavo-convex portions 16 and 18 repeated in one direction, and in this embodiment, corrugated into a thin stainless steel pipe. Manufactured. The metal flexible tube 12 may be used by attaching a blade knitted with a stainless steel wire to the outer periphery.

  The vibration attenuator 14 is fitted on the metal flexible tube 12 so as to vary the natural frequency of the metal flexible tube that is common or approximate to the vibration source frequency to obtain a frequency shifted from the resonance point or resonance region. Pseudo-natural frequency generation means that shifts externally, for example, the resonance of the frequency of any self-excited vibration caused by internal fluid or forced vibration such as a prime mover pump and the natural vibration frequency of a metal flexible pipe It has a vibration damping function for the state.

  In this embodiment, in particular, the vibration attenuator 14 is externally detachably fitted to the flexible tube, and has at least one close contact portion 20 in the externally fitted state, and at the same time, other non-close contact portions. Have Further, the vibration attenuator 14 is slidable in the longitudinal direction of the metal flexible tube 12.

  Specifically, in FIGS. 1 to 4, the vibration attenuator 14 has a notch 22 in which a part of a cylinder is notched in the axial direction along the cylinder axis 100, and has an arc shape having a C-shaped cross section. It is formed with the incomplete cylindrical body 15 comprised by these. The vibration attenuator 14 of this embodiment can be detachably fitted to the metal flexible tube by a pressing operation in a direction substantially orthogonal to the tube axis. Further, it is movable in the longitudinal direction of the tube 12. In the embodiment, the incomplete cylindrical body 15 has a C-shaped cross section, for example, by cutting a part of a circular arc of a metal cylindrical plate having a certain degree of spring property, for example, a central angle of about 40 degrees in the axial direction. And has a diameter slightly larger than the diameter of the convex portion 18 of the metal flexible tube 12 and is fitted to the outer surface of the metal flexible tube when fitted. The This incomplete cylindrical body or incomplete metal cylindrical plate is reinforced by inward bending crimping at both ends of the notch. As shown in FIG. 3A, the incomplete cylindrical body 15 is elastically deformed by applying a force to open both ends in the circumferential direction due to the nature of the material, and is restored as indicated by a solid line when the force is released. Therefore, as shown in FIG. 4, the notch 22 is applied to the surface of the metal flexible tube 12 and is pressed strongly to form the incomplete cylinder as shown by the chain line in FIG. When both ends of 15 are deformed and enlarged, and further pushed in and fitted into the outer surface of the flexible tube, they are restored and completely fitted and attached as shown in FIG. At this time, the incomplete cylindrical body 15 has a smooth curved inner wall. Therefore, the uneven surface of the flexible tube and the inner wall of the incomplete cylindrical body 15 are, for example, points x1, x2, and x3, or The portions are in close contact with each other, and the other portions form separated non-contact portions, and further, a gap H is formed between the recess 16 and the inner surface of the incomplete cylindrical body 15. As described above, the vibration attenuator 14 needs to have a non-contact portion or a gap H with respect to the surface of the flexible tube in at least a part of the vibration attenuator 14 in a state of being externally fitted to the flexible tube 12. For example, when all parts of the vibration attenuator 14 are in full contact with the outer surface of the metal flexible tube 12, the function of attenuating the vibration attenuator 14 is small when the mass of the vibration attenuator 14 is smaller than that of the metal flexible tube 12. Does not have damping ability. This is presumably because the vibration attenuator 14 itself is simply attached to the tube 12 and vibrates integrally when it is in a fully contacted state, and the influence of the mass addition effect by the vibration attenuator 14 is too small. If the vibration attenuator is externally fitted with a non-adhered part or gap H to the surface of the flexible tube, the part away from the pipe 12 with the gap or the non-adhered part has its own mass and spring function. When these are connected to the flexible tube 12 in a state of being partly in close contact, not only the mass addition effect by the vibration attenuator 14 but also absorption of vibration energy by sliding between the tube 12 and vibration This is because the influence of the mass distribution and stiffness distribution of the attenuator 14 itself can be effectively used. The vibration attenuator 14 composed of the incomplete cylindrical body 15 can be separated from the state of FIG. 1 by forcibly expanding the both ends of the cross section of the incomplete cylindrical body 15 as shown by the chain line in FIG. .

  Further, the incomplete cylindrical body 15 that is a vibration attenuator is provided to be slidable in the longitudinal direction of the metal flexible tube 12. That is, the incomplete cylindrical body 15 does not fall due to its own weight when the metal flexible tube 12 is erected, but is externally fitted so as to slide and move in any direction of the flexible tube easily by, for example, manual operation. It is necessary to be. As a result, the mass distribution of the metal flexible tube can be freely adjusted. Although not shown, it is pressed in a direction substantially orthogonal to the flexible tube shaft 100 and is detachably fitted on the outer surface of the vibration attenuator 14 to elastically urge the vibration attenuator 14 against the flexible tube in the tight contact direction. A reinforcing wire may be provided. At the same time, the reinforcing wire has a function of adding mass to the vibration attenuator. The reinforcing wire may be externally fitted with substantially the same arc curvature as the outer surface of the incomplete cylindrical body 15.

FIGS. 5 and 6 show examples in which the configuration of the vibration attenuator of the vibration attenuating flexible tube device 10-1 of the second embodiment is different. In this second embodiment, the metal flexible tube 12 is the first one. The configuration is the same as that of the first embodiment, and illustration of the mounted state is omitted in FIGS. The basic structure, material, and function of the vibration attenuator are the same as those of the first embodiment shown in FIGS. The vibration attenuator 14-1 has a notch 22 in which a part of a cylinder is notched in the axial direction along the cylinder axis 100, and is an incomplete cylinder 15- configured by a circular arc having a C-shaped cross section. 1 is formed. The vibration attenuator 14 of this embodiment can be detachably fitted to the metal flexible tube by a pressing operation in a direction substantially orthogonal to the tube axis. Further, it is movable in the longitudinal direction of the tube 12. The incomplete cylindrical body 15-1 of the vibration attenuator 14-1 of the present embodiment has two incisions in the circumferential direction that are opposite to each other at the center position in the cylinder axial direction of the incomplete cylindrical body 15 of the first embodiment. The groove 32 is engraved in an offset shape, has a small continuous portion 34, and forms a long and narrow arc piece 36 in the center. The thin circular arc piece 36 at the center and the small continuous portions 34, 34 correspond to the connecting portion 33 of claim 5. In this embodiment, the incomplete cylinder 15 forms first and second incomplete cylinders 38 and 39 that are divided into two in the axial direction on both sides of the elongated arc piece 36. Specifically, the first and second incomplete cylinders 38 and 39 are each formed of an incomplete metal cylindrical plate and have a spring property in the direction of opening and closing the arc. As described above, in the second embodiment, the vibration attenuator 14 includes the plurality of incomplete cylinders 38 and 39 and the small continuous portion 34 that connects the incomplete cylinders so that the cylinder shaft 100 can be bent. Configured. Therefore, the first and second incomplete cylindrical bodies 38 and 39, the small continuous portion 34, and the arc piece 36 are integrated. As a result, when the metal flexible pipe 12 is bent and disposed, for example, depending on the situation of the construction site, the thin arc piece 36 bends corresponding to the bend, and the external fitment and detachability of the vibration attenuator can be reduced. The vibration of the metal flexible tube can be attenuated while maintaining the slidability in the longitudinal direction of the tube and the bendability from the axial direction. Although not shown, in the vibration-damping flexible tube device 10-1 of the second embodiment, a reinforcing wire (not shown) having substantially the same arc curvature may be externally fitted from the outer surface of the incomplete cylindrical body 15. That is, a reinforcing wire is provided that presses in a direction substantially orthogonal to the flexible tube shaft 100 and detachably fits on the outer surface of the vibration attenuator 14, and elastically urges the vibration attenuator 14 against the flexible tube in the tight adhesion direction. Good.

Further, in the vibration attenuator 14-2 of the third embodiment shown in FIG. 7, the incomplete cylindrical body 15-2 has the same shape as that of the first embodiment and performs the same function, but the material is For example, it is composed of a hard plastic molding material. The vibration attenuator 14-2 has a notch 22 in which a part of a cylinder is notched in the axial direction along the cylinder axis 100, and is an incomplete cylinder 15- constituted by a circular arc body having a C-shaped cross section. 2 is formed. The vibration attenuator 14 of this embodiment can be detachably fitted to the metal flexible tube by a pressing operation in a direction substantially orthogonal to the tube axis. Further, it is movable in the longitudinal direction of the tube 12. In this embodiment, the reinforcing wire 40 having substantially the same arc curvature is externally fitted from the outer surface of the incomplete cylindrical body 15-2. The reinforcing wire 40 is fitted in a positioning groove provided in a partially cut cylindrical plate, adds mass to the incomplete cylindrical body 15-2, and is attached to both end portions of the axial notch 22. A spring property is added to reinforce the fitting state retention during the detachable external fitting operation to the metal flexible tube 12. That is, in this embodiment, the vibration attenuator 14 is pressed in a direction substantially orthogonal to the flexible tube shaft 100 and detachably fitted to the outer surface of the vibration attenuator 14, and the vibration attenuator 14 is elastically urged against the flexible tube in the tight contact direction. A reinforcing wire 40 is provided. 7 of the third embodiment is mounted on a metal flexible pipe device (not shown) to constitute a vibration damping flexible pipe device 10-2.

Further, in the vibration attenuator 14-3 of the fourth embodiment shown in FIGS. 8 and 9, two arc plates are arranged to face each other, and one side thereof is connected by a spring member 46 such as a coil spring to become an opening / closing side. A clip structure in which the other side is spring-biased in the clamping direction is configured. That is, in the present embodiment, the vibration attenuator 14-3 includes the open / close members 42 and 44 as arc plates that are partially biased in the clamping direction and the open / close member against the spring in the other part. And a clip device having an operation portion 48 to be operated. The open / close members 42 and 44 are detachably fitted to the outer periphery of the metal flexible tube by the operation of the operation unit 48. The vibration attenuator 14 of this embodiment can be detachably fitted to the metal flexible tube by an operation from a direction substantially orthogonal to the tube axis. The vibration attenuator 14-3 of the fourth embodiment is also detachably fitted to the flexible tube 12, has at least one close contact portion in the fitted state, and is further movable in the longitudinal direction of the tube 12. is there. When the outer surface of the metal flexible tube is sandwiched and separated from the opening / closing side of the arc plate, the engagement with the tube 12 can be released by grasping the knob 48 on the other end side of the opening / closing side. In addition, FIG. 9 of 4th Embodiment is mounted | worn with a metal flexible pipe apparatus, and comprises the vibration damping flexible pipe apparatus 10-3.

  FIG. 10 shows a vibration attenuator 14-4 of the fifth embodiment. The vibration attenuator 14-4 includes a hollow solid arcuate body 50 that is detachably fitted to the outer periphery of the metal flexible tube 12, and the hollow solid arcuate body 50 is taken in and out of the hollow through an opening with a plug 54. A liquid or a granular material can be freely introduced. In addition, FIG. 10 of 5th Embodiment is mounted | worn with the metal flexible tube apparatus which is not shown in figure, and comprises the vibration damping flexible tube apparatus 10-4. The vibration attenuator 14-4 of the fifth embodiment includes a hollow solid circular arc body 50 that can be detachably fitted to the metal flexible tube 12, and a mass adjusting liquid 52 that is filled in the hollow interior. Yes. The vibration attenuator 14-4 has a notch 22 in which a part of a cylinder is notched in the axial direction along the cylinder axis 100, and is formed of a hollow solid arcuate body 50 having a C-shaped cross section. It is formed of a complete cylindrical body 15-3. The vibration attenuator 14-4 of this embodiment can be attached to and detached from the metal flexible tube by a pressing operation in a direction substantially orthogonal to the tube axis. Further, it is movable in the longitudinal direction of the tube 12. The hollow solid arcuate body 50 is made of, for example, synthetic resin plastic, and the arc inner wall is formed on the outer surface of the metal flexible tube 12 by an arbitrary fixing means such as a belt, a string, a mounting band, and clip fixing on both ends. It is fixed by external fitting. A plug member 54 for opening and closing the upper opening is attached to the hollow solid circular arc body 50. The plug member 54 is opened and water is added, for example, to adjust the mass of the entire vibration attenuator 14-4, and the flexible metal made by the non-adhered portion or the gap H formed in relation to the uneven portion on the surface of the tube 12 The mass distribution of the tube 12 can be adjusted. Further, since the tube 12 is detachably fitted to the tube 12 in a state where the longitudinal movement of the tube 12 is ensured, the mass of the vibration attenuator can be adjusted at one fixed point itself, thereby changing the mass distribution of the tube 12. be able to.

  The vibration attenuator 14-5 for the flexible tube 12 according to the sixth embodiment of FIG. 11 has a configuration similar to that of the embodiment of FIGS. 1 to 4, but a slightly thick metal solid circular arc plate. The incomplete cylindrical body 15-4 used constitutes a vibration attenuator, and is detachably fitted to the metal flexible tube 12 by an arbitrary fixing member (not shown). The mass is secured by the weight of the incomplete cylinder 15-4 itself. Further, in the vibration attenuator 14-5 of the sixth embodiment, in a state where an elastic member 58 such as rubber or a spring is attached to the inner wall of the incomplete cylindrical body 15-4 and the metal flexible tube 12 is externally fitted, The elastic member 58 is interposed between the outer surface of the twelve outer surface and the inner wall of the vibration attenuator. As a result, the elastic member functions as if it were a dynamic damper and can effectively absorb and attenuate vibrations. Although not shown, the vibration attenuator 14-5 for the flexible tube 12 according to the sixth embodiment is also detachably fitted to the outer surface of the vibration attenuator 14 by pressing in a direction substantially orthogonal to the flexible tube axis 100 and vibrating. It is preferable to provide a reinforcing wire that elastically urges the attenuator 14 against the flexible tube in the close contact direction. At that time, the reinforcing wire simultaneously has a function of adding mass to the vibration attenuator, and mass adjustment can be performed. The incomplete cylindrical body 15-4 may be configured as a weight member in which a hollow solid circular arc plate made of, for example, a synthetic resin plastic molding material is filled with sand or fluid. In addition, FIG. 11 of 6th Embodiment is mounted | worn with a metal flexible tube apparatus, and comprises the vibration damping flexible tube apparatus 10-5.

  Next, the vibration-damping flexible tube device of the seventh embodiment will be described with reference to FIGS. 12 and 13, but the same components as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. In FIG. 13, the vibration-damping flexible tube device 10-6 of the present embodiment is detachably attached to the metal flexible tube 12 formed by repeatedly forming uneven portions 16 and 18 on the surface and extending in one direction, and the metal flexible tube 12. A vibration attenuator 14-6 that has at least one close contact portion in an externally fitted state and is movable in the longitudinal direction of the tube. As shown in FIG. 12, the vibration attenuator 14-6 of the present embodiment is formed of a coil spring member 60 including a cylindrical coil spring that is detachably fitted to the outer periphery of the metal flexible tube 12. In FIG. 13, the vibration attenuator 14-6 has six close contact portions 206 that are in close contact with the convex portion 18 of the metal flexible tube 12 and five non-contact portions 216 that are formed between the concave portions 16. ing. The coil spring of the present embodiment is formed in a cylindrical shape by closely winding the filaments in the axial direction, and each filament and the convex portion 18 of the flexible tube are in close contact with each other, and the gap between the concave portion 16 and the coil spring. The part becomes a non-contact part. The vibration attenuator 14-6 is formed from a coil spring member 60, and is configured by an insertion body that is inserted in advance from one end side of the metal flexible tube 12 and is externally fitted to the metal flexible tube. Further, the vibration attenuator 14-6 is fitted so as to move freely in the longitudinal direction of the metal flexible tube by an external force, although it does not fall due to its own weight when the metal flexible tube 12 is erected. That is, the coil spring member 60 has the inside of the cylinder inserted into the metal flexible tube 12, and there is no difference in the diameter of the tube between the flexible tube and the metal flexible tube 12 with a light fitting force. The coil spring member 60 is fitted. Therefore, when an external force is applied, it can be easily moved in the longitudinal direction of the tube. As shown in FIG. 14, the coil spring member 60 can be easily moved in the longitudinal direction of the flexible tube by spreading the coil wire outward by twisting around the spring longitudinal axis. By making the vibration attenuator a cylindrical coil spring member, the coil spring itself can be elastically deformed to be stretchable and bendable, and further, the shaft longitudinal direction, the direction of bending from the shaft, expansion and contraction between each wire, and bending return can be freely made. Therefore, the metal flexible tube 12 to be fitted can be freely deformed to maintain an appropriate fitting state in any installation state at the construction site.

  As shown in FIGS. 15A and 15B, the coil spring member 60 has a configuration in which a space H between the winding wires is provided in the direction of the spring axis 200 so that the winding wires are not in close contact with each other. You can also In this case, for example, when the wire diameter is about 0.2 mm to 0.5 mm, elastic deformation with a large amount of deformation is obtained. In this case, as shown in FIG. 16, the axis of the coil spring and the flexible tube are arranged adjacent to each other in parallel. Then, a vibration attenuator can be attached to the flexible tube so that the coil spring is turned to feed the spring wire into the flexible tube.

  Using a vibration attenuator configured as shown in FIGS. 1 to 4, water was passed through a metal flexible pipe having an outer diameter of 25 mm and an inner diameter of 20 mm, and the noise change at a position of 0.5 m on the machine side at that time was measured. Is shown in FIG. Noise includes pump and other noise. One vibration attenuator was attached on the flexible tube at the place where the most damping effect was obtained. As shown in FIG. 17, it was confirmed that when the water flow pressure was about 1.0 MPa, noise attenuation of about 9 dB (A) was obtained when the vibration attenuator was attached compared to when the vibration attenuator was not attached.

The vibration-damping flexible tube device of the present invention described above is not limited to the above-described embodiment, and may be arbitrarily modified without departing from the essence of the invention described in the claims. .

  The vibration-damping flexible tube device of the present invention can be effectively applied to various metal flexible tubes used for piping for transporting liquids, gases, and other fluids.

10, 10-1, 10-2, 10-3, 10-4, 10-5, 10-6 Vibration damping flexible pipe device 12 Metal flexible pipe 14, 14-1, 14-2, 14-3, 14 -4, 14-5, 14-6 Vibration attenuator 15, 15-1, 15-2, 15-3, 15-4 Incomplete cylindrical body 20 Adhering portion 22 Notch 33 Connecting portion x1, x2, x3 Adhering point -Adhering part H Cavity 100 Cylindrical shaft 50 Hollow solid circular arc body

Claims (12)

A metal flexible tube formed repeatedly in one direction by repeating irregularities on the surface;
A vibration attenuating flexible, comprising: a vibration attenuator that is detachably fitted to a metal flexible tube and has at least one close contact portion and is movable in the longitudinal direction of the tube. Tube equipment.   2. The vibration attenuating flexible pipe according to claim 1, wherein the vibration attenuator is formed of a fitting body having a non-contact portion or a gap with respect to the pipe surface at least partially in a state of being externally fitted to the metal flexible pipe. apparatus.   2. The vibration attenuator is externally fitted so as not to drop due to its own weight when the metal flexible tube is erected, but to move freely in the longitudinal direction of the metal flexible tube by an external force. 2. The vibration-damping flexible tube device according to 2.   The vibration attenuator is externally fitted to the metal flexible pipe by an operation on the metal flexible pipe directed in a direction intersecting the axial direction of the metal flexible pipe. Vibration damping flexible pipe device.   The vibration attenuating flexible pipe device according to any one of claims 1 to 4, wherein the vibration attenuator includes an incomplete cylindrical body having an axial notch.   6. The vibration attenuator comprises a plurality of incomplete cylinders and a connecting portion for connecting the incomplete cylinders such that their cylindrical axes can be freely bent. Vibration damping flexible pipe device.   7. The vibration-damping flexible tube device according to claim 1, wherein the body of the vibration attenuator is elastically deformed and can be freely attached to and detached from the metal flexible tube.   A reinforcing wire is provided that presses in a direction substantially perpendicular to the flexible tube axis and is detachably fitted to the outer surface of the vibration attenuator, and elastically urges the vibration attenuator in the close contact direction with respect to the flexible tube. The vibration-damping flexible tube device according to any one of claims 1 to 7.   9. The vibration attenuator comprises a clip device having an opening / closing member that is spring-biased in the clamping direction and is detachably fitted to the outer periphery of the metal flexible tube. Vibration damping flexible pipe device.   The vibration attenuator comprises a hollow solid arc body that is detachably fitted on the outer periphery of a metal flexible tube, and the hollow solid arc body is a liquid or powder that can be freely inserted into and removed from the hollow portion through an opening with a stopper. The vibration-damping flexible tube device according to any one of claims 4 to 9, wherein   4. The vibration attenuating flexible tube device according to claim 1, wherein the vibration attenuator comprises a coil spring member that is detachably fitted to the outer periphery of the metal flexible tube. The vibration attenuator used for the vibration attenuating flexible tube apparatus in any one of Claims 1 thru | or 11.

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