KR100756416B1 - Vibration reducing apparatus - Google Patents

Abstract

A vibration reducing apparatus for a pipe is provided to prevent the pipe from being deformed or broken by the vibration caused due to steam or fluid flowing along the pipe or load of the pipe. A vibration attenuating apparatus(10) for a pipe(40), includes a first support member(100), a second support member(200), connecting holes, and a damper(50). The first support member is formed into a semi-circular tube shape, and has both ends with extensions. The second support member is formed into a semi-circular tube shape, and has both ends with extensions. The connecting holes are formed at the extensions of the first and second support members. The damper has one end connected to a support member connected with the first and second support members and the other end connected to a beam(20) or a column(30) so as to attenuate vibration generated from the pipe.

Description

Vibration Reduction Apparatus

1 is a perspective view showing a preferred embodiment of the present invention.

2A is a front view of the embodiment of FIG. 1.

2B is a front view of another embodiment of FIG.

Figure 3 is a perspective view of the combination of the support member used in the practice of the present invention.

Figure 4 is a perspective view showing another preferred embodiment of the present invention.

5A is a front view of the embodiment of FIG. 4.

5B is a front view of another embodiment of FIG. 4.

6 is a perspective view of a rotator used in the practice of FIGS. 5A and 5B.

7A and 7B are side views illustrating the specific operation of FIG. 6.

8A is a perspective cross-sectional view of one embodiment of a friction damper used in the practice of the present invention.

8B is a sectional view of FIG. 8A.

9A is a perspective cross-sectional view of one embodiment of a spring damper used in the practice of the present invention.

9B is a sectional view of FIG. 9A;

<Description of the symbols for the main parts of the drawings>

10; Vibration reduction device 20; Bo

30; Column 40; pipe

50; Shock absorber 60; Connector

70; Bolt 80; nut

90; Support member

100; First support member 120; Extension

140; Fastener

200; Second supporting member 220; Extension

240; Fastener

300; Rotator 310; Connecting pin

315; Nut 320; 1st connection plate

325; Fasteners 330; 2nd connection plate

335; Fasteners 340; Friction pad

350; Washer 360; spring

370; Push pin 375; Fixing Nut

400; Spring buffer 410; Fixed bar

412; First fixing stage 413; 2nd fixed stage

414; Fixing part 416; Joiner

420; Cylinder 422; Cylinder cover

430; Friction plate 440; Disc spring

450; Turnbuckle

500; Frictional shock absorbers 510; Fixed bar

512; First fixing stage 513; 2nd fixed stage

514; Fixing part 516; Joiner

520; Cylinder 525; Cylinder cover

530; Friction plate 535; Friction pad

537; Wedge 540; Disc spring

550; Turnbuckle 560; Spin controller

The present invention relates to a vibration reduction device for a pipe that attenuates vibration generated by fluctuations in the flow rate in a pipe installed in a power plant or a plant or the like.

In general, piping is installed in a power plant or a plant or a general industrial site or a large building to move steam or fluid at high temperature and pressure. These pipes vary in size and type. In general, an elbow pipe connecting a long straight pipe and a corner part is assembled and connected, and the pipe is fixed to a column or wall of a factory by a separate fixing means.

However, when the fluid is moved through the pipe, the fluid flowing in the pipe exerts pressure on the surface of the pipe to deform the pipe, and when the high temperature and high pressure steam moves inside the pipe, the steam is condensed into water to change the pipe. This causes the pipe to vibrate, causing the pipe to deform or break. In particular, in the case of an elbow pipe, the problem of deformation or breakage is severe.

At this time, the vibration generated in the pipe can be classified into two types. That is, the normal operation vibration caused by the operation characteristics of the fluid equipment and the geometric characteristics of the piping system (the natural frequency of the piping system) by the pump or the fan, the sudden start-up or shutdown of the power plant, the sudden operation of the valve, or the sudden stop of the pump. Vibration occurs due to the pressure change, which is a transient vibration when a large force is applied to the main equipment, pipe support, or structure in a short time.

Due to such vibration, if the pipe is damaged, steam or fluid flowing therein may be discharged to the outside, which may cause serious damage to workers or mechanical equipment such as factories. In addition, as the pipe is generally formed long, there is a problem that sag occurs due to its own load, thereby causing the pipe to be broken.

On the other hand, the conventional shock absorber is installed in the pipe to reduce such a vibration, while the actual pipe is installed in the factory or the like in most cases vibrating in many directions, while the conventional shock absorber reacts in one direction. Therefore, there was a problem that can not cope with the vibration in the multi-direction properly.

In order to solve the above problems, an object of the present invention is to provide a vibration reduction device for a pipe that can effectively attenuate the multi-directional vibration generated in the pipe.

In addition, to provide a vibration reduction device for pipes that can reduce the phenomenon that the pipe is deformed or broken due to vibration caused by steam or fluid flowing inside the power plant or plant, or sagging due to the load of the pipe itself. For the purpose of

In order to achieve the above object, the present invention is a vibration reducing device for attenuating vibration caused by fluctuations in the flow rate in a pipe installed in a power plant or a plant, etc., is formed in a semi-circular tubular shape, the extension portion is formed at one end and the other end A first support member; A second support member formed in a semi-circular tubular shape and having an extension portion formed at one end and the other end; A fastening hole formed in each of the extension portions of the first support member and the second support member; One end is connected to the support member coupled to the first support member and the second support member and the other end is connected to the beam or column, characterized in that it comprises a shock absorber for reducing the vibration generated in the pipe.

In addition, the present invention is provided between the support member and the shock absorber, connecting pins; A first connection plate having one end hinged to the connection pin and the other end connected to the support member; Friction pads provided at both sides of the first connection plate and fitted to the connection pins; On one side of the friction pad, one end is hinged to the connecting pin and the other end is characterized in that it further comprises a rotator comprising a second connecting plate connected to one end of the buffer.

In addition, the buffer of the present invention, the first fixed end is formed at one end and the other end of the fixed bar is formed with a fixed portion; A cylinder having an inner cylindrical shape, one end of which has a cylinder cover provided to receive the fixing bar therein and a second fixed end formed on the outside of the other end; A fixed plate protruding around an outer circumference of the fixed bar accommodated in the cylinder; It characterized in that it comprises a friction member is wound on the outer peripheral surface of the fixing bar on both sides of the fixing plate.

In addition, the present invention is characterized in that it further comprises a turnbuckle provided between the first fixed end and the cylinder cover.

In addition, the shock absorber of the present invention is a fixed bar formed with a first fixed end is formed at one end and the other end; A cylinder having an inner cylindrical shape to accommodate the fixing bar, and having a cylinder cover having a hole through which the other end of the fixing bar passes, and having a second fixing end formed at an outside of the other end; A friction member provided on an outer circumferential surface of the fixing bar accommodated in the cylinder; A friction plate provided on both sides of the elastic body at the outer circumference of the fixing bar and having a friction pad formed at a position in contact with the inner circumference of the cylinder; And a spin controller provided between the first fixed end and the friction plate formed on the first fixed end.

In another aspect, the present invention is characterized in that it further comprises a turnbuckle provided between the spin regulator and the first fixed end.

Hereinafter, the present invention will be described in detail with reference to preferred embodiments of the accompanying drawings. The name of the rotator 300 used in the practice of the present invention was named as a rotator in the sense that each connecting plate (320, 330) moves while interacting to transfer vibration or the direction is alternately switched. In the present embodiments, dampers and shock absorbers are used in the same sense as devices for reducing vibration.

1 to 3 are diagrams showing one embodiment of the present invention. Specifically, Figure 1 is a perspective view showing a preferred embodiment of the present invention, Figure 2a is a front view of the embodiment of Figure 1, Figure 2b is a front view of another embodiment of Figure 1, Figure 3 is used in the practice of the present invention Combined perspective view of the support member.

The present invention relates to a vibration reducing device (10) for damping vibrations generated by fluctuations in flow rate, etc. in a pipe (40) installed in a factory or a plant, etc., which is formed in a semicircular tubular shape as shown in FIG. It is formed in a tubular shape of the first support member 100 and the semicircle, the extension portion 120 is formed at the other end, and penetrates using the second support member 200 having the extension portion 220 formed at one end and the other end. To support the pipe 40, and to form the fastening holes (140,240) in each of the extension portion (120,220) of each of the first support member 100 and the second support member 200 by using bolts and nuts The support member was fastened to support the pipe.

And the fastened support member 90 is connected to the beam 20 or the pillar 30 using a variety of shock absorbers 50, one end of the shock absorber 50 is connected to the support member 90, the other end Is connected to the beam 20 or the pillar 30 was configured to effectively reduce the vibration generated in the pipe 40 and the like.

In other words, if the flow rate and the like suddenly fluctuate in the pipe 40 or the like, the flow velocity is increased due to the pressure change (Bernouille Theorem). Therefore, in the present embodiment, in order to effectively dampen the vibration generated in the pipe 40, the support member 90 supporting the pipe 40 while supporting the first support member 100 and the second support member 200. It is configured to be fastened, it is configured to attenuate vibration by connecting to the shock absorber (50). The shock absorber 50 used in this embodiment can be implemented using various shock absorbers (dampers), such as a well-known friction shock absorber, an oil damper, a spring damper, in addition to the shock absorbers 400 and 500 mentioned later.

At this time, preferably between the support member 90 and the shock absorber 50 can be connected using a connector 60 as shown in FIG.

That is, the coupling holes 416 and 516 formed at the first fixing ends 412 and 512 formed at one end of the shock absorbers 400 and 500 to be described later are hinged with the connector 60, and the connector 60 is supported. The shock absorber 50 and the support member 90 may be connected to each other by joining the member 90 to the first support member 100 or the second support member 200 through welding or bolting. What is carried out using the connector 60 having such a configuration is the embodiment shown in FIGS. 1, 2A and 2B.

4 to 7 is a view showing another embodiment of the present invention, Figure 4 is a perspective view showing another preferred embodiment of the present invention, Figure 5a is a front view of the embodiment of Figure 4, Figure 5B is a front view of another embodiment of FIG. 4, and FIG. 6 is a perspective view of the rotator 300 used in the implementations of FIGS. 5A and 5B, and FIG. 7 is a side view illustrating a specific operation of FIG. 6.

In carrying out the present invention, as shown in FIG. 6, the rotator 300 may be further provided between the support member 90 and the shock absorber 50. In this case, the rotator 300 transmits vibration generated between the shock absorber 50 or the pipe 40 when the vibration is generated in the pipe 40 or when the vibration is transmitted from the beam 20 or the pillar 30. Perform the function.

At this time, the rotator 300 is preferably a connection pin 310 as shown in Figure 6 attached; One end is hinged to the connecting pin 310, the other end is connected to the support member 90, the first connecting plate 320; Friction pads 340 provided at both sides of the first connection plate 320 and fitted to the connection pins 320; And one side of the friction pad 340, one end is hinged to the connecting pin and the other end may be configured by a second connecting plate 330 connected to one end of the shock absorber.

As shown in FIG. 6, the connecting pin 310 in this embodiment has a fixed shaft formed at one end thereof and a screw thread formed at the other end thereof to be coupled with the nut 80. The connecting pin 310 is hinged by inserting an intermediate portion of the second connecting plate 330 into one end of the first connecting plate 320 to be described later and both sides of the first connecting plate 320.

In this case, the first connecting plate 320 fitted to the connecting pin 310 may be configured such that one end is hinged to the connecting pin 310 and the other end is connected to the support member 90. Then, one end of each of the first connecting plate 320 is fitted into each other by using two second connecting plates 330, and the other end of the second connecting plate 33 is one end of the shock absorber. It is configured to fasten using a fixing pin 370 and a fixing nut 375 as shown in Figure 6 attached to the hinge to the first fixing end (412, 512) of the buffer formed in the. What is done using this rotator 300 is the embodiment shown in Figures 4, 5A and 5B attached.

In the case of carrying out the present invention using such a rotator 300, the pipe is actually vibrated in many directions in most cases and the conventional shock absorber will react in one direction, but in the case of using such a rotator 300 is attached 7A and 7A, in parallel with the shock absorber 50 that reacts in one direction, vibration control and vibration transmission with respect to the horizontal direction, the vertical direction, and the direction of the combined force thereof can be performed.

7A is a diagram illustrating the movement of the rotator 300 when the pipe 40 vibrates to the left.

In this case, when the pipe 40 vibrates to the left side, in the case of the shock absorber 50 on the right side, the fixing bar of the shock absorber relaxes and expands to the outside of the cylinder. On the contrary, the fixing bar of the shock absorber on the left side is inserted into the cylinder. Contraction. FIG. 7B is an example in which the pipe vibrates to the right.

In this case, the vibration width of the pipe 40 is generally about 10 mm in normal operation and transient vibration, but in this embodiment, the width of the vibration of the pipe is exaggerated for clarity. The capacity of the shock absorber is required to be 30 mm or more.

In addition, the shock absorber 50 used in the practice of the present invention can be implemented using a spring shock absorber 400, as shown in Figures 8a and 8b.

8A and 8B illustrate one embodiment of a spring shock absorber 400 used in the practice of the present invention, and FIG. 8A is a perspective view partially cut out of the spring shock absorber 400 used in the practice of the present invention. 8B is a cross-sectional view of FIG. 8A.

Spring buffer 400 is preferably a first fixing end 412 is formed at one end and the fixing bar 410 is formed at the other end fixed portion 414; A cylinder having an inner hollow shape is formed, and a cylinder cover 422 provided to accommodate the fixing bar 410 therein is formed at one end thereof and a second fixed end 413 is formed at the outside of the other end ( 420); A fixing plate 430 protruding around the outer circumference of the fixing bar 410 accommodated in the cylinder 420; It may be implemented including an elastic body wound on the outer circumferential surface of the fixing bar 410 on both sides of the fixing plate 430. 8A and 8B, the disk spring 440 is used as the elastic body. Accordingly, the vibration reduction effect of canceling the vibration due to the compressive tension of the disk spring can be expected.

That is, as shown in FIGS. 8A and 8B, a fixing part 414 is formed in the cylinder 420 to restrain the disk spring 440, and the fixing plate 430 is disposed between the disk springs 440. Position it. When the vibration comes from one end of the spring shock absorber 400 by this configuration, the fixing plate 430 is moved to the other end of the spring shock absorber 400 to compress the disk spring 440 while the vibration energy is converted into elastic energy and vibrated Attenuates After the vibration is attenuated, the fixed spring 440 is expanded by the restoring force (F = kx) so that the fixed plate 430 returns to its original position.

In addition, the embodiment of the present invention may further include a turnbuckle 450 provided between the first fixing end 412 and the cylinder cover 422 while adjusting the length of the fixing bar 410. In other words, it is possible to carry out by adjusting the length of the fixed bar 410 by calculating the expected vibration according to the implementation conditions.

Meanwhile, in implementing the present invention, the shock absorber may be implemented using the friction type shock absorber 500 in the above-described embodiment. That is, it is comprised so that the vibration transmitted from the piping 40 etc. may be attenuated by switching to heat by friction.

9A and 9B illustrate an embodiment of a friction shock absorber 500 used in one embodiment of the present invention, and FIG. 9A is a perspective cross-sectional view of one embodiment of a friction shock absorber 500 used in the practice of the present invention. And FIG. 9B is a cross-sectional view of FIG. 9A.

The friction type buffer 500 may be a known shock absorber, but preferably, as shown in the accompanying drawings, a first fixing end 512 is formed at one end and a fixing bar having a fixing part 514 formed at the other end ( 510); A cylindrical cover 525 is provided in a hollow cylindrical shape to accommodate the fixing bar 510, and a cylinder cover 525 having a hole through which the other end of the fixing bar 510 penetrates is formed at one end thereof, and a second outside the other end thereof. A cylinder 520 having a fixed end 513 formed thereon; An elastic body formed on an outer circumference of the fixing bar 510 accommodated inside the cylinder 520; A friction plate 530 provided on both sides of the elastic body at the outer circumference of the fixing bar 510 and having a friction pad 535 formed at a position in contact with the inner circumference of the cylinder; The first fixed end 512 and the friction plate 530 formed on the side of the first fixed end 512 is provided between the spin controller 560 to adjust the friction force by adjusting the compression of the friction plate to be carried out Can be.

That is, when vibration is transmitted from the pipe 40, the fixed bar 510 of the present invention is pushed toward the other end of the friction buffer 500, and the other end of the fixed bar 510 is directed into the cylinder 520. At this time, the spin controller 560 pushes the wedge 537 and the friction plate 530 and the friction pad 535 formed between the friction plate 530 and the inner circumference of the cylinder 520 rubs against the inner circumference of the cylinder 520. It generates a heat to attenuate vibration while generating heat.

That is, as the rotator moves, the fixed bar reciprocates due to the friction force caused by the compression of the inside of the cylinder, thereby reducing the vibration due to the friction between the friction pad and the fixed plate, and also driving the shock absorber due to the displacement of the rotator. . In the case of taking such a structure, it should be noted that the friction coefficient of the friction pad 535 and the elastic modulus of the disk spring 540 are calculated in anticipation of the vibration occurring in the pipe in advance in the design of the friction buffer 500. It must be designed to meet the implementation of

In addition, the embodiment of the present invention using the friction type shock absorber 500, as shown in the accompanying drawings, preferably further comprises a turnbuckle 550 between the spin controller 560 and the first fixed end 512. By performing it can be carried out while adjusting the length of the fixing bar 510.

The unique or heterogeneous effects distinguished from the prior art generated by the above-described configuration are as follows.

According to the embodiment of the present invention, it is possible to provide a vibration reduction device capable of effectively attenuating multidirectional vibrations generated in a pipe.

In addition, there is an effect of reducing the phenomenon that the pipe is deformed or broken due to the vibration of the pipe fluid or the sag caused by the load of the pipe itself.

Claims (6)

In the vibration reducing device for attenuating vibration generated by fluctuations in the flow rate, etc. in a pipe installed in a factory or a plant, A first support member formed in a semi-circular tubular shape and having an extension portion formed at one end and the other end; A second support member formed in a semi-circular tubular shape and having an extension portion formed at one end and the other end; A fastening hole formed in each of the extension portions of the first support member and the second support member; A shock absorber having one end connected to a support member to which the first support member and the second support member are coupled, and the other end connected to a beam or a column to reduce vibration generated in the pipe; Vibration reduction device of the pipe, characterized in that comprises a. In claim 1, It is provided between the support member and the shock absorber, Connecting pins; A first connecting plate having one end hinged to the connecting pin and the other end connected to the support member; Friction pads provided at both sides of the first connection plate and fitted to the connection pins; A second connecting plate having one end hinged to the connecting pin and the other end connected to one end of the shock absorber on one side of the friction pad; Vibration reduction device of the pipe, characterized in that further comprises a rotator configured to include. The method of claim 1 or 2, The buffer, A fixed bar having a first fixed end formed at one end and a fixed part formed at the other end thereof; A cylinder having an inner cylindrical shape, one end of which has a cylinder cover provided to receive the fixing bar therein and a second fixed end formed on the outside of the other end; A fixed plate protruding around an outer circumference of the fixed bar accommodated in the cylinder; Elastic bodies wound around outer peripheries of the fixing bars on both sides of the fixing plate; Vibration reduction device of the pipe, characterized in that comprises a. In claim 3, A turnbuckle provided between the first fixed end and the cylinder cover; Vibration reduction device of the pipe, characterized in that further comprises. The method of claim 1 or 2, The buffer, A fixed bar having a first fixed end formed at one end and a fixed part formed at the other end thereof; A cylinder having an inner cylindrical shape to accommodate the fixing bar, and having a cylinder cover having a hole through which the other end of the fixing bar passes, and having a second fixing end formed at an outside of the other end; An elastic body formed on an outer circumference of the fixing bar accommodated in the cylinder; A friction plate provided at both sides of the elastic body at the outer circumference of the fixing bar and having a friction pad formed at a position in contact with the inner circumference of the cylinder; A spin controller provided between the first fixed end and a friction plate formed at the first fixed end; Vibration reduction device of the pipe, characterized in that consisting of. In claim 5, Vibration reduction device of the pipe further comprises a turnbuckle provided between the spin controller and the first fixed end.

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