JPS61144480A - Vibration-proof supporter for piping - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vibration isolating support device for piping, etc., and more specifically, it is used to prevent horizontal and vertical displacement (vibration, etc.) caused in piping, etc. due to earthquake motion, etc. Restraint.

and relates to a vibration-proof support device for piping, etc., which absorbs the kinetic energy of the displacement and prevents the generation of harmful stress on the piping, etc. The present invention is directly directed to piping that is subject to vibration. However, the scope of application includes not only piping but also vibration-isolating support devices for structural systems that cause vibration, such as machine foundations and vibration-isolating floor structures, or for structural systems that are subject to vibration.

Hereinafter, piping will be described for convenience of explanation.

[Prior Art] Conventionally, as piping vibration isolators, there are, for example, (1) a spring type vibration isolator, (2) a hydraulic type vibration isolator, and the like.

However, ■ has a relatively simple structure and has the advantage of being able to avoid resonance by raising the natural frequency of the entire piping system and moving it away from the forced frequency caused by external disturbances. There are drawbacks such as constraint, and large-capacity products are subject to restrictions due to spring manufacturing.

Also, ■ is effective in preventing resonance vibration.

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In addition, the response to small amplitude vibrations or high frequency vibrations is poor and no effect can be expected, and the sealing material (generally a rubber elastic body) is constantly subjected to internal stress, which is coupled with aging of the rubber elastic body. There are drawbacks such as the need to frequently replace the sealing material.

Therefore, the applicants first applied for patent application No. 56-156177.
No. 58-57581 (hereinafter referred to as "prior art"), proposed a vibration-proof support device for piping that eliminates the drawbacks of the prior art described above.

FIG. 1θ shows the prior art anti-vibration support device.

This device consists of a fixed base C, which has a surrounding wall on the upper surface of a fixed flat plate a.
and a spacer d on the lower surface so as to be slidable within the surrounding wall of the fixed base C.
a movable plate e that protrudes, and a movable plate e that is fixed on the movable plate e;
The gap g between the upper surface of the fixed flat plate a and the lower surface of the movable plate e in the surrounding wall is filled with a viscous fluid, and the surrounding wall of the fixed stand C is A dustproof cover i is provided between the upper surface and the upper surface of the movable plate e.

Now, when the pipe P receives a force that displaces it in the horizontal direction.

The support stand f to which the pipe P is fixed and the movable plate e are slidably supported on the fixed stand C via the spacer d, so the movable plate e moves in the direction of displacement of the chain pipe P. Here, since the gap g between the lower surface of the movable plate e and the upper surface of the fixed flat plate a is filled with viscous material, viscous shear resistance acts here, and the movable plate e and the tubes that move therewith are The rapid motion of P is restrained by the viscous shear resistance force and stops,
That kinetic energy is absorbed.

This prior art anti-vibration support device has various excellent functions, and in particular, vibration displacement can be smoothly absorbed regardless of its speed or amplitude.

By the way, while the above-mentioned prior art anti-vibration support device performs its function against horizontal displacement occurring in the piping, it does not have any restraining force against vertical upward displacement. The disadvantage is that the device loses its load supporting function, and furthermore, the displacement causes the fixed plate a
This causes a change in the gap g between the movable plate e and the viscous shear resistance due to the change in the gap g, and the device is not applicable to pipes arranged horizontally with respect to the frame. However, it has the disadvantage that it is limited to locations where vertical displacement is small, or where the pipe is not adversely affected by vertical displacement even if there is vertical displacement.

In addition to the above-mentioned prior art, the applicants have also
-3422 (Japanese Unexamined Patent Publication No. 58-121390) is proposed, but this is a vibration isolator of a tube arranged vertically to the frame, and this device does not have a load supporting function. Therefore, there is still a drawback that the scope of application is limited.

[Problems to be Solved by the Invention] This invention makes effective use of the vibration isolation function based on viscous shear resistance in the prior art described above, and uses one device to move the mount in the horizontal or vertical direction (horizontal direction). It can be applied to pipes arranged in a continuous manner (in the vertical direction), and it always has a load supporting function and protects against horizontal and vertical displacements that occur in the pipe. The object of the present invention is to obtain a vibration-proof support device for piping that exhibits a vibration function.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the vibration isolating support device for piping, etc. of the present invention adopts the following technical means (configuration).

In other words, (1) inside a casing consisting of a fixed plate and a surrounding wall integrally formed on the upper surface of the fixed plate, a movable plate having a plurality of sliding members protruding and fixed on the bottom surface is mounted on the fixed plate via the sliding members; At least the minute gap between the fixed plate and the movable plate is filled with a viscous material; A movable support body with an upward opening is vertically fixed, (1) a support member connected to the piping side is disposed to cover the opening of the hollow part of the movable support body, and (2) In the hollow part of the body, a movable cylindrical body fixed to the support member and provided with an exhaust hole is provided with one end thereof at the bottom of the hollow part of the movable support member and a coil carried on the support member at the other end. The spring is fitted into the movable support body, and a small gap is maintained between the inner circumferential surface of the hollow part of the movable support and the outer circumferential surface of the movable cylindrical body by a plurality of sliding members. It is characterized in that the hollow portion of the movable support including a minute gap is filled with a viscous material.

In the above configuration, the movable support can take various forms as long as it maintains its substantial function, as shown in the following examples.

In the vibration isolating support device having the above configuration, for the pipe arranged horizontally with respect to the pedestal, a fixing plate with a fixing base is attached to the support member to which the movable cylindrical body is fixed via a connecting plate, The pipe is fixed to the fixing base, or the vibration isolating support device is placed facing each other with the pipe in between, and a fixing plate with fixing ribs is attached to the support member of the device via a connecting plate. An embodiment is adopted in which the fixing ribs are each fixed to the tube. Furthermore, for a pipe arranged perpendicularly to the frame, the vibration isolating support device is arranged so as to face each other across the pipe, and the support member of the device is provided with a fixing rib via a connecting plate. An embodiment is adopted in which a fixing plate is attached and each of the fixing ribs is fixed to the tube.

The sliding material fixed to the bottom of the movable plate, the inner circumferential surface of the hollow part of the movable support, or the outer circumferential surface of the movable cylindrical body so as to protrude from the chain part is between the movable plate and the fixed plate of the casing on which the movable plate is arranged, or The role of a holding member, a so-called spacer, that is interposed between the inner peripheral surface of the support body and the outer peripheral surface of the movable cylindrical body to allow the movable plate or the movable cylindrical body to move smoothly and to maintain a minute gap between the two. It also fulfills the following.

The sliding members are provided at appropriate intervals on the bottom surface of the movable plate, the inner circumferential surface of the movable support, or the outer circumferential surface of the movable cylindrical body.

The sliding material used is a copper alloy, a multi-layered material in which a copper-based sintered alloy layer containing a solid lubricant such as graphite is integrally adhered to a thin steel plate, or a synthetic resin. It is fixed to the bottom surface of the movable plate, the inner circumferential surface of the movable support, or the outer circumferential surface of the movable cylindrical body by welding, adhesion, or by embedding a portion thereof protruding from the chain portion.

The viscous material filled in the casing and the hollow part of the movable support is 1. In addition to normal viscous materials such as silicone oil, high-viscosity polymeric viscous materials are used in order to particularly improve damping characteristics. When two opposing surfaces are displaced relative to each other via a viscous body, a resistance force acts between the two surfaces in a direction that stops the movement.

Since the gap distance between the two surfaces is minute and the relative area of the plate surfaces is large, the resistance force acting between the two surfaces is extremely large, and rapid displacement of the tube is immediately restrained.

When a high-viscosity polymeric viscous material is used as the viscous material, the above-mentioned tendency becomes even more remarkable.

In other words, this viscous body has non-Newtonian fluid properties, that is, pseudoplastic fluid properties (a phenomenon in which the higher the velocity of the fluid, the easier it is to change from high viscosity to low viscosity and flow, and the degree of increase in resistance force becomes smaller.Resistance force (is approximately proportional to the speed to the 0.5 to 0.6 power), and the generation of the resistance force is constant regardless of the displacement amplitude and vibration frequency as long as the speed is the same, and when a constant speed is given, the resistance force is Since the resistance force shows a rise like a rectangular wave, it is extremely sensitive to vibrations and has the characteristics of excellent quick response. As such a viscous material, for example, a polymeric viscous material such as polyisobutylene, polypropylene, polybutene, dimethylborisaxane, or asphalt is used.

[Effect] The vibration isolating support device having the above-described structure has the following functions.

If a pipe placed horizontally with respect to the pedestal or a pipe placed vertically with respect to the pedestal is suddenly displaced in the horizontal direction due to earthquake vibration, etc., the displacement will be caused by the casing fixing plate fixed to the pedestal side. This appears as relative movement between the two surfaces in the minute gap between the movable plate connected to the tube side. However, since there is a viscous material in the tiny gap,
This is where viscous shear resistance comes into play.

In addition, if a pipe placed horizontally or vertically with respect to the frame is suddenly displaced vertically due to earthquake motion, the displacement will occur between the inner circumferential surface of the movable support and the outer circumferential surface of the movable cylindrical body. A viscous shearing resistance acts there due to the viscous body interposed in the minute gap between the two.

The viscous shear resistance force is generally proportional to the viscosity coefficient of the viscous body, the area between two surfaces that move relative to each other through the viscous body, and their relative speed, and inversely proportional to the gap distance between the two surfaces. However, in this device, the gap distance between the two surfaces is minute, and the relative area of the plate surfaces is large, so the resistance force acting between the two surfaces is extremely large, and sudden displacement of the tube is immediately restrained. .

It should be noted that the present vibration isolation support device allows relatively slow displacement that occurs in the tube, such as expansion and contraction of the tube due to thermal changes, without any restriction.

[Effects] The vibration isolating support device of the present invention has the above-described structure and function, and has the following various superior effects compared to conventional devices.

■ This anti-vibration support device prevents the sudden horizontal displacement of pipes placed horizontally or vertically relative to the pedestal from the action of seismic vibrations, etc. by using the fixed plate of the casing fixed to the pedestal side. The viscous shear resistance of the viscous material present in the minute gap between the movable plate and the movable plate connected to the tube side quickly stops the tube, thereby preventing the generation of harmful stress on the tube.

■ This anti-vibration support device quickly stops the sudden vertical displacement that occurs in the pipe due to the viscous shear resistance of the viscous material that exists in the minute gap between the inner peripheral surface of the hollow part of the movable support and the outer peripheral surface of the movable cylindrical body. to prevent the generation of harmful stress on the pipe.

・The giant anti-vibration support device always has a load supporting function using a coil spring placed between the support member and the movable support.

(2) This anti-vibration support device can be applied to pipes arranged horizontally and vertically with respect to the frame, which is very advantageous in terms of design.

Embodiment J FIGS. 1 and 2 are a cross-sectional view and a vertical cross-sectional view showing an embodiment of the present invention. In this embodiment, a mode will be described in which a pipe arranged horizontally with respect to a pedestal is supported with vibration isolation.

In the figure, l is a casing fixed on a pedestal G,
The casing 1 is formed from a fixed plate 2 and a cylindrical surrounding wall 3 integrally provided on the upper surface of the fixed plate 2.

Reference numeral 4 denotes a disk-shaped movable plate disposed within the casing 1, and a plurality of suberi members 5 are fixed to the bottom surface of the movable plate 4 so as to protrude from the bottom surface.

This embodiment shows an example in which six sliding members 5 are fixed and protruded from the bottom surface of the movable plate 4 along the circumferential direction (see FIG. 3).

The movable plate 4 is disposed within the casing 1 so as to be able to slide on the fixed plate z of the casing 1 via the sliding member 5, with a range of movement within the surrounding wall 3.

Here, the sliding material 5 allows the movable plate 4 to slide smoothly and also serves as a spacer to maintain a minute gap Sl between the bottom surface of the movable plate 4 and the upper surface of the fixed plate 2 of the casing l. accomplish

Ll is a viscous material filled in the surrounding wall 3 of the casing l.

Inside the casing l, viscous shear resistance is created by the fixed plate 2 of the casing l, the movable plate 4 placed on the upper surface of the fixed plate 2 with a small gap Sl, and the viscous body Ll interposed on the small gap S. The site of occurrence is configured.

Reference numeral 6 denotes a movable support body, which is composed of the following members (numerals 7 to 9 in the drawings).

Reference numeral 7 denotes a support base erected and fixed on the movable plate 4, and the upper part of the support base 7 protrudes from the opening of the surrounding wall 3 of the casing l. Although the support base 7 is shown as having a hollow shape in this embodiment, it may of course be of a solid shape, and its horizontal cross-sectional shape is usually cylindrical, but other shapes are possible. (For example, a quadrilateral or other polygon) may be used.

A cover plate 8 is fixed to the upper surface of the support base 7, and the cover plate 8 is arranged to cover the opening of the surrounding wall 3. The lid plate 8
serves to prevent dust from entering through the opening of the casing l, and also has the function of supporting the load of a fixed cylindrical body, which will be described later.

A fixed cylindrical body 9 is integrally provided on the upper surface of the lid plate 8 via a bottom plate 9a. H is a hollow portion that opens upward in the fixed cylindrical body 9. I is the bottom of the hollow part H (i.e., the top surface of the bottom plate 9a). In this embodiment, a mode in which the fixed cylindrical body 9 is fixed to the bottom plate 9a is shown,
The fixed cylindrical body 9 may be directly fixed on the cover plate 8.

The movable support 6 of this embodiment is made of the above-mentioned members in consideration of assembly, but as shown in other embodiments to be described later, the movable support 6 has an essential shape (for example, the upper outer surface is cylindrical, , having the hollow part H), the members can be omitted and transformed as needed.

Reference numeral 10 denotes a support member disposed to cover the opening of the fixed cylindrical body 9, and the support member 10 includes a support portion 11 and a support portion 11.
A mounting portion 12 protruding from the lower surface of the mounting portion 12, a cylindrical surface portion 13 having a reduced diameter with a stepped portion, and the cylindrical surface portion 13 and the shoulder portion 1.
It is provided with a protrusion 15 whose diameter is reduced by 4.

Reference numeral 16 denotes a coil spring, and the coil spring 16 has one end supported by the bottom plate 9a (that is, the bottom part I of the movable support hollow part H) and the other end supported by the shoulder part 14 of the support member 10. The support member 10 is guided by the protrusion 15 of the support member 10 and is disposed between the support member 10 and the bottom plate 9a.

17 is a movable cylindrical body fixed to the attachment part 12 of the support member 10, the movable cylindrical body 17 has an annular gap with the cylindrical surface part 13 of the support member 10, and has the coil spring 16 on its inner surface. It is held and inserted into the inner surface of the fixed cylindrical body 9, that is, the hollow part H of the movable support.

Reference numeral 18 denotes an exhaust hole provided in the movable cylindrical body 17. The exhaust hole 18 allows the inner surface of the movable cylindrical body 17 to communicate with the outside air.

19 is a cylindrical cover fixed to the outer peripheral edge of the support part 11 of the support member 10, and the cylindrical cover 19 is attached to the fixed cylindrical body 9
It surrounds the outer circumferential surface of.

Reference numeral 20 denotes a plurality of sliding members located between the inner circumferential surface of the fixed cylindrical body 9 and the outer circumferential surface of the movable cylindrical body 17, and fixed to the outer circumferential surface of the movable cylindrical body 17 so as to protrude from the linear surface; The sliding member 20 has the role of smoothing the movement of the movable cylindrical body 17, the role of a spacer that maintains a minute gap S2 between the two cylindrical bodies 9 and 17, and the role of a fixed cylinder that prevents horizontal displacement occurring in the pipe P (to be described later). The reaction force receiver that transmits the reaction force to the body 9 and to the movable plate 4 that is interlocked with the body 9 plays the role of a member. In addition, this sliding material 2
0 can be fixed to the inner circumferential surface of the fixed cylindrical body 9 instead of fixing it to the outer circumferential surface of the movable cylindrical body 17, and the same role can be achieved.

L2 is a viscous body filled in the movable cylindrical body 17 and the fixed cylindrical body 9 including the minute gap S2 between the outer circumferential surface of the movable cylindrical body 17 and the inner circumferential surface of the fixed cylindrical body 9.

21 is a connecting plate fixed to the support member 10;
Reference numeral 2 designates a fixing plate that is coupled and fixed to the connecting plate 21, and 23 indicates a fixing base that is integrally provided on the fixing plate 22.

The pipe P is fixed and supported on the fixed base 23 directly or indirectly via the clamp 24 fastened and fixed to the outer peripheral surface of the chain pipe P.

FIG. 4 is a longitudinal cross-sectional view showing a mode in which the present vibration isolation support device is attached to a pipe P arranged perpendicularly to the pedestal G, and FIG. 5 is a plan view thereof.

That is, the present vibration isolation support device is placed on a pedestal G provided around the pipe P so as to face each other with the chain pipe P interposed therebetween. The casing 1 of the device is fixed to the gantry G side, and a fixing plate 22 provided with fixing ribs 25 is fixed to the supporting member 10 of the device via a connecting plate 21.

The fixing rib 25 is fixed directly to the pipe P or to a clamp 24 fastened and fixed to the outer peripheral surface of the chain pipe P.

FIG. 6 is a cross-sectional view showing an example in which the mounting mode of the present vibration isolating support device shown in FIG.

In other words, the pipe P arranged horizontally on the frame G
The vibration isolating support device is placed facing each other with the two sides in between. The casing l of the device is fixed to the gantry G side, and a fixing plate 22 provided with fixing ribs 25 is fixed to the supporting member io of the device via a connecting plate 21. 3, a clamp 2 in which a fixing rib 25 is fastened and fixed directly to the pipe P or to the outer peripheral surface of the chain pipe P
It is indirectly fixed to 4.

[Other Embodiments] The vibration isolation support device for piping, etc. of the present invention is not limited to the above-mentioned embodiments, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following embodiments are included within the technical scope of the present invention.

FIG. 7 shows another embodiment of the vibration isolating support device.

In the figures, the same reference numerals are given to the same members as in the previous embodiment.

This embodiment is characterized in that the movable support 6A is integrally formed with a solid support base 7A and a fixed cylindrical body 9A having a hollow portion H, and the cover plate 8A is connected to the movable support 6A. It is characterized by being fixed to the outer peripheral surface of.

FIG. 8 shows still another embodiment of the present vibration isolation support device.

The present embodiment is characterized in that the movable support body 6B is a fixed cylindrical body 9B having a hollow portion H directly erected and fixed on the movable plate 4. Further, a bellows-shaped dustproof cover 8B is installed over the outer peripheral surface of the movable support 6B and the upper surface of the surrounding wall 3 of the casing 1.

According to this embodiment, there is an advantage that the height of the vibration isolating support device itself can be reduced.

Fig. 9 shows the case when the pipe P is displaced in the vertical direction.

This shows a structure in which a stopper 26 is provided on the vibration isolating support device to prevent the movable plate 4 connected to the pipe P side from floating due to the displacement. In other words, the vertical displacement of the pipe P is as described above. A minute gap S between the movable support body 6 and the movable cylindrical body 9
However, when a vertical displacement exceeding the design conditions occurs, the acting force of the viscous shear resistance is large, so the movable cylindrical body 9 is stopped due to the upward displacement. Movable support 6
may also float upward. Although the stopper mechanism prevents this floating, it is not necessarily necessary within the design conditions.

This stopper 26 includes a disk 28 having a circular hole 27 fixed to the end face of the opening of the cylindrical surrounding wall 3, and is fixed to the circular hole 27, surrounds the outer peripheral surface of the support base 7, and hangs down from the upper surface of the movable plate 4. It is composed of a cylindrical body 29 arranged as shown in FIG.

The stopper 26 prevents the movable plate 4 from floating, and in addition to the above-mentioned structure, the stopper 26 is used to prevent floating of the movable plate 4. A similar purpose is achieved by providing the same.

As yet another embodiment of the present invention, it is possible to adopt a mode of use in which only vertical displacement of the pipe P is absorbed when almost no horizontal displacement occurs.

This embodiment is achieved by further fixing the stopper 26 to the movable plate 4 or the movable support 6, thereby restraining the horizontal movement of the movable support 6.

Alternatively, it can be obtained by fixing the lid plate 8 directly on the casing. Then, by releasing the stopper that restricts horizontal movement, the original operating state can be restored.

Even in this embodiment, the load of the arrangement 'ffP is applied to the coil spring 1
6, and the vertical vibration of the piping is well absorbed by the viscous shear resistance.
It is possible to obtain a vibration isolating support device with a wide range of applications without requiring any other load supporting means.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a vibration isolating support device showing an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view thereof, FIG. 3 is a plan view showing how sliding members are arranged on the bottom surface of a movable plate, Figure 4 is a longitudinal cross-sectional view showing how this vibration isolating support device is attached to a pipe arranged perpendicularly to the frame, Figure 5 is a plan view thereof, and Figure 6 shows the installation mode shown in Figure 4. A cross-sectional view showing an embodiment applied to a pipe arranged horizontally with respect to a frame, FIG. 7 is a vertical cross-sectional view showing another embodiment of the present vibration-proof support device, and FIG. 8 is a cross-sectional view of the present vibration-proof support device. FIG. 9 is a longitudinal cross-sectional view showing still another embodiment, and is a view showing a mode in which a stopper mechanism is added to the present vibration-proof support device. FIG. 10 is a longitudinal sectional view showing a prior art anti-vibration support device.

Claims (1)

[Claims] 1. Inside the casing (1), which consists of a fixed plate (2) and a surrounding wall (3) integrally formed on the upper surface of the fixed plate, there are a plurality of sliding members (5) on the bottom surface. A movable plate (4) having a protruding and fixed movable plate (4) is slidably arranged on the fixed plate (2) via the sliding member (5), and at least the fixed plate (2) and the movable plate (4) A viscous material (L1) is filled in a minute gap (S1), and on the movable plate (4), at least the upper half is cylindrical and the hollow part (H) is open upward. A movable support (6) is erected and fixed, and a support member (10) connected to the piping side is arranged to cover the opening of the hollow part (H) of the movable support (6). , A movable cylindrical body (17) fixed to the support member (10) and provided with an exhaust hole (18) is provided in the hollow part (H) of the movable support (6), with one end thereof connected to the movable support. The movable support is fitted into the bottom (I) of the hollow part (H) of the body (6) while holding the coil spring (16) whose other end is carried by the support member (10). A minute gap (S2) is maintained between the inner circumferential surface of the hollow part (H) of the body (6) and the outer circumferential surface of the movable cylindrical body (17) by a plurality of sliding members (20), and the minute gap is A vibration isolating support device for piping, etc., characterized in that a viscous material (L2) is filled in the hollow part (H) of the movable support body containing (S2). 2. The movable support (6) includes a support base (7) fixed on the movable plate (4), a cover plate (8) fixed on the support base (7), and the cover plate (8) A vibration isolation support device for piping, etc., as set forth in claim 1, comprising a fixed cylindrical body (9) having a hollow portion (H) that opens upward and is fixed thereon. 3. The movable support (6) includes a solid support base (7A) fixed on the movable plate (4) and an upwardly opening opening integrally formed on the solid support base. Hollow part (H
) A vibration isolating support device for piping, etc., according to claim 1, comprising a fixed cylindrical body (9A) having a fixed cylindrical body (9A). 4. An annular cover plate (8A) on the outer peripheral surface of the movable support (6)
A vibration-proof support device for piping, etc., according to claim 3, which is fixedly installed. 5. The movable support (6) is a fixed cylindrical body (9B) having an upwardly opening hollow part (H) that is integrally fixed on the movable plate (4).Claim 1 Anti-vibration support device for piping, etc. described in . 6. A vibration-proof support device for piping, etc., as set forth in claim 5, comprising an annular cover plate fixed to the outer peripheral surface of the movable support (6). 7. The piping according to claim 3 or 5, in which a dust cover (8C) is installed over the outer peripheral surface of the movable support (6) and the upper surface of the surrounding wall (3) of the casing (1). Anti-vibration support devices such as.