JPS6023647A - Vibration damping device - 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 [Technical Field of the Invention] The present invention relates to an allocation device interposed between a supporting body such as a structure and a supported body such as piping, and particularly relates to The present invention relates to a vibration damping device that allows low-acceleration displacement of a body and suppresses high-acceleration displacement.

[Technical background of the invention]

In general, supported bodies such as piping installed in various chemical plants, thermal power plants, or nuclear power plants, etc., tolerate gradual low IJO and amplitude displacements due to temperature changes such as thermal expansion, and are not susceptible to sudden earthquakes or earthquakes. must be arranged in such a way as to suppress high-acceleration displacement caused by external forces. For this reason, there is a need to prevent or suppress vibrations caused by earthquakes, etc. The supported body may be a structure, etc. Among these, a spring-type allocation device can be used to prevent or suppress vibrations caused by thermal expansion, etc. This displacement causes a reaction force, which increases the stress in the piping, and there are drawbacks such as the resonance effect of the springs causing a non-luminous distribution effect. In addition, in hydraulic vibration damping devices, the durability of the hydraulic oil and backing etc. is not good, so there is a need to regularly inspect the damping devices. , there was a problem that performance deterioration was accelerated.

[Purpose of the invention]

This invention takes into account the above points, allows gentle displacement at different speeds due to temperature changes such as thermal expansion, suppresses high acceleration displacement, and prevents resonance from occurring, resulting in a vibration damping effect. The purpose is to provide a submerged allocation device.

[Summary of the invention]

In order to achieve the above-mentioned purpose, this I6. The moon-related allocating device includes a first movable shaft that is slidably housed on one side of the cylindrical body and connected to a supported body such as piping;
A second movable shaft is provided on the other side of the cylindrical body and is attached to a support such as a structure, and a second movable shaft is provided on the other side of the cylindrical body, and a second movable shaft is attached to a support such as a structure, and the relative liquid level in the axial direction of the two shafts is controlled by low acceleration displacement due to temperature change. The allocator t1# is housed in a cylindrical main body, and is provided with an allocator groove that sometimes allows displacement and suppresses high-acceleration displacement such as during an earthquake.

[Actual case of invention]

Embodiments of the vibration damping device according to the present invention will be described below with reference to the accompanying drawings.

FIG. 41 is a sectional view showing a preferred embodiment of the damping device 19 of the present invention, and reference numeral 10 in the figure indicates a cylindrical body of the damping device. The cylindrical body (0 consists of a broom 1 and second tubes 11 and 12 that can be divided into two parts, and the end flanges 11 and 12m of both cylindrical bodies 11 and 12 are connected to each other with connecting tools such as mounting bolts. The first cylindrical body 11 slidably accommodates the first movable shaft rod. A presser plate [4 is interposed between them. A plurality of presser plates [4 are provided at appropriate intervals in the axial direction of the movable shaft, and sliding surfaces are formed on both sides. The movable shaft 13 by the presser plate 14 is provided. The tightening force is adjusted with the 814-node screw 15.Adjusting screw [5
is installed in the ttc 1 cylinder [1, and this adjustment screw [5
Through the adjustment, the frictional force between the first movable shaft [3 and the presser plate 14 is adjusted by 614 points as appropriate, thereby adjusting the magnitude of the displacement of the movable shaft.

On the other hand, the movable shaft 13 protrudes outward from the end of the first cylindrical body [1], and a supported body connecting bar [6] is supported at the tip of the movable shaft 13 by a ball joint or the like so that it can swing and rotate freely.

This connecting tool [6 is connected to a supported body (not shown) such as a support member (a), and is adapted to protect this. The other end of the first movable shaft [3 is opposed to the presser block [8] accommodated in the PJ2 cylinder 12 at a distance.

Further, the I:g2 cylinder [2, as shown in FIG. 2, is formed as a medical protection cylinder, and the intermediate shaft 19 is housed inside. The intermediate shaft 19 is provided with a presser lug (l-2t) as a fixed portion 4 on the negative side, and a ring-shaped or disc-shaped slider 21 is slidably provided on the other side. A plurality of disc springs (first springs) 22 are interposed in series or in parallel in series between the slider 21 and the presser nut. The series-parallel arrangement refers to the arrangement of a plurality of disc springs stacked one on top of the other in series. The other end of the intermediate shirt H9 protrudes through the slider 21, and the protruding end faces the presser block [8] at a distance of 2.5 mm so that it can be inserted into and taken out from the guide hole 24 for 1 of the presser block [8].

A second movable shaft 25 faces the intermediate shaft 19 at an interval in the axial direction, and the movable shaft 25 is housed in the second cylinder so as to be in line with the intermediate shaft 19. A retainer 26 is screwed onto the movable shaft 5 on the intermediate shaft 19 side, and a disc-shaped or ring-shaped slider 27 is slidably supported on the opposite side. Between the slider 27 and the presser foot, there is a disc spring (second
Springs) 28 are interposed in series or in series and parallel. The disc spring used has a spring constant different from that of the 1111 spring 22 interposed in the intermediate shirt eye 9. By making the spring constants of both disc springs ul different, it is possible to avoid resonance caused by the disc springs. Further, the slider 27, which is slidably supported by the second movable shaft 5, and the presser nut of the intermediate shaft 9 are connected by a connecting cylinder (a connecting rod may also be used) 29, and the slider 27 is connected to the intermediate shaft [9 and lb. % jjlI.

Slider 21, disc spring 22. Vibration damping is accomplished by the presser foot 2G and slider 27 attached to the g2 movable shaft 7) 25, as well as the disc spring 4 and the connecting cylinder 4. The restraining machine groove (equipment) is housed in the cylindrical body 10, and the first
and the relative axial displacement of the second moving shaft [3, 5,
The relative displacement of 5 is allowed during low acceleration displacement due to temperature change, and in addition to the allocation effect by the vibration damper 1'; It is mainly tolerated by freely supporting it.

The second movable shaft 5 protrudes outward from the end of the A2 cylindrical body [2, and a support 32 is supported at the tip of the second movable shaft 5 in a rotary manner. 5 is attached to a support (not shown) such as a construct.

Next, the operation of this invention will be explained.

By supporting the movable shaft L3 of the first cylindrical body 11 on a supported body and the movable shaft 5 of the second cylindrical body [2 on a support body in a swingable and rotatable manner, 3
The cylindrical body 0 is front-bottomed so that relative displacement occurs only in the axial direction. In the following explanation JUA, in order to facilitate understanding, it is assumed that the movable shaft 6 of the second cylinder body 12 is in a stationary state, and the movable shaft [3 of the first cylinder body 11 is displaced in the axial direction.

When a supported object such as a pipe is subjected to thermal expansion due to a temperature change and is gradually displaced, this displacement is caused by the supported internal connector 16.
from there to the first movable shaft 43. This movable shaft 13 slowly slides on a presser plate 14 interposed between it and the first cylindrical body 1 while contacting it in a J-shape, and is relatively displaced in the axial direction. Therefore, the displacement of the supported body is absorbed, and this displacement is not restrained. At this time, since the frictional force of the presser plate [4 is adjusted appropriately by the adjustment screw 15, the magnitude of the axial displacement of the first movable shaft 13 can be adjusted.

Next, when the supported body receives an external force that fluctuates at high acceleration due to an earthquake or the like, this external force is transmitted to the first movable shaft 13 via the supported body connector 16.

When this external force is large, the movable shaft [3 collides with the presser block [8], thereby transmitting it to the presser block [8]. As a result, the presser block [8 is moved to the second cylindrical body 1
2 in the axial direction. The displaced presser block 18 presses the slider 21 of the intermediate shirt 19,
The intermediate shirt (19) is displaced in the axial direction together with the presser collar (20) via the disc spring ρ. Due to this axial displacement of the presser nut ribs, the slider 27 of the second movable shaft (B) connected to the presser nut 20 collides with and presses against the second cylindrical body 12. Due to this pressing, the intermediate shaft E9 is
1m body [fixed against 2, then intermediate shirt)
One end of the large disk spring n inserted in 19 is restrained from displacement,
Since it is compressed, the displacement of the supported body can be restrained by this spring force.

In addition, when a supported object such as a pipe is subjected to high acceleration displacement in the opposite direction, the relative displacement is caused by the first movable shaft [3
By pulling the 41 cylinder 11 through the presser plate 14, the second cylinder 12 connected to the first cylinder 11 is moved toward the supported object. This second cylindrical body [2 no.
Due to the positive displacement, the slider n of the second movable shaft 5 is pressed, and the small disc spring mounted on the movable shaft 5 is compressed. This restricts displacement of the supported body in the opposite direction.

In addition, in the explanation of one example of an actual gun of the present invention, an example was explained in which the cylindrical body was divided into 14 parts by the first cylinder and the second cylinder, but this can be divided into 3 parts. It may be purchased or constructed as a single piece.

In addition, although the movable shaft housed in the first cylindrical body has been described as facing the presser block at a distance,
A presser block may be provided integrally or integrally with the tip of the movable shaft. In this case, the presser block and the slider attached to the intermediate shaft may be opposed to each other with a predetermined distance therebetween.

Further, in one embodiment of the present invention, an example in which a disc spring is interposed in the second movable shaft and the intermediate shaft has been described, but instead of the disc spring, a coil spring or the like having a different spring constant may be interposed. [Effects of the Invention] As described above, the side strip device according to the present invention includes a first movable shaft connected to a supported body such as a pipe,
The second movable shaft, which is attached to a support such as a trench structure, is housed in the cylindrical body, and a damping mechanism that suppresses acceleration and displacement is housed within the cylindrical body, thereby reducing heat caused by temperature changes). The gentle displacement of the shaft is allowed by the relative displacement of the first and second movable shafts, and the vibration damping mechanism suppresses high-acceleration displacements such as those caused by earthquakes. It is possible to provide a highly flexible allocation device.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of an allocation device according to the present invention, and FIG. 2 is a diagram showing an allocation mechanism accommodated in the cylindrical body of the breakage device. [0... cylindrical body, 11... 2 bar 1 cylindrical body, 12...
・Second cylindrical body, L3...first movable shaft, L4...
Holding plate, E6... Supported object connector, [8... Holding block, I9... Intermediate shaft, addition, Ka... Holding nand (fixing member), 21.27... Slider, 22 ,
Ah... disc spring, 29... connecting tube (connecting member), (2
)... Vibration damper 14. :32...Support. Representative Patent Attorney Nori Chika I (and 1 other person) Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. A first RJJ movement shaft that is slidably housed on one side of the cylindrical body and connected to a supported object such as piping, and that is slidable on the other side of the cylindrical body. A second movable shaft attached to a support such as a building (4) allows relative displacement in the axial direction of both shafts during low acceleration displacement due to temperature changes, and allows for high acceleration displacement due to earthquakes etc. 2. The first movable shaft is housed in the cylindrical body so as to be frictionally slidable therein. According to claim 1, the J!J4 friction force is adjusted by adjusting a push plate interposed between the first movable shaft and the cylindrical body. 3. The damper groove has an intermediate shaft that is aligned with the fA1 movable shaft and the second movable shaft at intervals within the cylindrical body, and this intermediate shaft has a presser nut or the like on one side. A fixed member is fixed, and a slider is slidably provided on the other side, a first spring such as a disc spring is interposed between the fixed member and the slider, and the slider is attached to the movable shafts f and l at intervals. The fixed member is connected to a slider slidably provided on the second movable shaft via a connecting member, and a fixed member fixed to the slider and the second movable shaft is brought into contact with the opposing presser block. The vibration damping device according to claim 1, wherein a second spring such as a disk spring is interposed between the vibration damping device and the vibration damping device. The allocation device according to claim 1, which is constituted by integrally connecting the first movable shaft with the support body connecting device. 2. The allocation device according to claim 1, wherein supports for the supports are provided rotatably and swingably, respectively.