JPS6025024Y2 - Hydraulic vibration isolator for piping - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hydraulic vibration isolator in a pipe support device or the like.

Conventionally, as this type of piping support device, a hydraulic cylinder with a built-in check valve was used between a building beam, etc. and the piping.
It is installed via a turnbuckle, eye bolt, or connecting bolt, etc., and the cooperative action of this hydraulic cylinder and check valve suppresses vibrations and sudden downward movements caused by piping earthquakes, safety valve blowouts, etc. It is.

However, in the hydraulic cylinders conventionally used for this purpose, the check valve V connects two chambers divided by the piston P of the hydraulic cylinder C, as schematically shown in Figures 1 and 2 of the attached drawings. The check valve is installed in the middle of the communication pipe T (Fig. 1) or in the piston part P (Fig. 2), so when the check valve V needs to be adjusted, the flange parts F at both ends of the hydraulic cylinder C can be adjusted. Either disassemble the cylinder C1, disassemble the communication pipe T, and disassemble the valve case part to adjust the performance (in the case of Fig. 1), or disassemble the cylinder C1.
After disassembling the flange F1 piston part P, it was necessary to perform performance adjustment (in the case of Fig. 2).

In addition, since the valve case is installed in the middle of the communication pipe T (Fig. 1), the valve case must be manufactured in a separate process from the main body, and the parts manufactured in a separate process must be sealed separately. Since there are many connection points, the risk of oil leakage increases accordingly.

Furthermore, by incorporating the check valve V in the middle of the communication pipe T, when resistance occurs, the valve case, the communication pipe, the terminal, etc. other than the main body are also subjected to high pressure, increasing the risk of oil leakage.

With this invention, performance can be adjusted by simply disassembling the flange part and terminal part, and
In terms of machining, machining is made easier by eliminating the need for valve cases, etc. Moreover, there are fewer parts and fewer connection points, and even when resistance occurs, high pressure only occurs inside the cylinder, and terminals, communication pipes, etc. The object of the present invention is to obtain a hydraulic vibration isolator for piping that does not generate high pressure and can also be used as a reaction force receiver by simple modification.

Hereinafter, the present invention will be described with reference to figures 3 to 6 of the attached drawings showing one embodiment thereof.
This will be explained in detail based on the figures.

First, Figures 3 and 4 schematically show the device of the present invention installed in piping as a hydraulic reaction force receiver and a hydraulic vibration isolator, respectively, and suspended from a beam of a building, etc. However, in Figures 3 and 4, 1 and 2 are beams, and 3 and 4 are beams.
, 5 is a bracket attached to the bottom surface of beams 1 and 2;
30. ．． 302, 303 is a hydraulic reaction force receiver or vibration isolator according to the present invention, and these piston rod parts are connected by reamer bolts 12, 13, 14 through eye bolts 6, 7, 8 and turnbuckles 9, 10° 11. It is connected to brackets 3, 4.5.

Furthermore, each hydraulic reaction force receiver 30□ or hydraulic vibration isolator 302.
The flange portion of 303 on the opposite side from the piston rod is connected to the reamer bolts 21, 22, .
23.

In addition, 25. ．． 25□ is pipe clamp 1B, 19.2
0 shows a suspended pipe.

Next, each hydraulic reaction force receiver 301 or hydraulic vibration isolator 30°, 303 has a cylinder 31, a flange 32° 33 that closes both ends of the cylinder 31, and a sliding movement inside the cylinder 31, as shown in FIG. A piston 36 is inserted into the cylinder 31 and divides the interior of the cylinder 31 into two chambers 34 and 35, and a piston rod 37 is connected at one end to the piston 36 and extends through one flange 33. ing.

Furthermore, each flange 32, 33 has a respective chamber 3 of the cylinder.
Terminals 38.39 communicating with 4.35 are connected so as to face each other, and both terminals 38.39 are
They are interconnected by connecting pipes 42 via threaded pipe fittings 40 and 41, respectively.

Each flange 32.33 also has a terminal 38.3.
Each of the check valves 50 has a built-in check valve 50 in the connecting portion with the flange 32, 33, and the check valve 50 has a cylindrical valve chamber 51 opened in the radial direction in each flange 32, 33, and a cylindrical valve chamber 51 inside the cylindrical valve chamber 51. A flange 52 is formed at one end and a conical valve part 5 is fitted at the other end.
3, and a valve spring 55 interposed between the lower surface of the flange 52 of the valve element 54 and the outer end surface of the terminal 38.39.
5, the valve portion 53 formed at the lower end is opened in the terminal 38.39 so as to communicate with the pipe fitting 40.41, and the opening on the flange 32.33 side of the oil passage 45 is opened. The valve seat 46 is spaced apart from the valve seat 46 formed therein.

In addition, a cylindrical oil passage portion 56 is formed in the valve body 54 in the axial direction from the flange 52 side, and an oil passage hole 57 is formed in the wall of the valve body 54 so that the oil in the cylinder 31 can be From the oil passage 47 formed in the flange 32 , 33 , through the oil passage cylindrical portion 56 of the valve body 54 and the oil passage hole 57 , into the valve spring chamber formed between the outer circumferential side of the valve body 54 and the valve chamber 51 . Flow, valve section 53
and the valve seat 46 to communicate with the oil passages 45 of the terminals 38 and 39.

Note that oil to each chamber 34, 35 of the cylinder 31 is sent from an oil reservoir 60 connected to one terminal 39 via a pipe joint 48, and is supplied to both chambers 34, 35.
The difference in the amount of oil is automatically adjusted by this reservoir 60.

In addition, in FIG. 5, reference numeral 49 indicates an assembly bolt that connects both the seven flange 32 and 33.

The present invention has the above configuration, and its operation will be explained next.

First of all, as shown in FIG.
1, the check valve 50 is placed only in the flange 33 on the piston rod 37 side,
No check valve is set inside the flange 32 on the anti-rond side.

In this way, if the boiler operates and the pipe 2
51 rises due to thermal expansion, the cylinder 31 moves up via the eye bolt 15, and the piston 36 moves down inside the hydraulic cylinder 31.

Then, the oil in one chamber 34 of the cylinder 31 is pushed by the piston 36, passes through the oil passage 47 of the flange 32 and the oil passage 45 of the terminal 38, passes through the connecting pipe 42, and is transferred to the other terminal 39, the check valve 50, and the oil passage 45 of the terminal 38. Other flange 3
3 to the other chamber 35 of the cylinder 31, and excess oil flows into the oil reservoir 60.

Therefore, when the piston 36 descends, the pipe 251 moves upward without any restriction.

Furthermore, when the operation of the boiler is stopped, the pipe 25□, which has been thermally expanding, gradually cools down, and the pipe 25□ then descends due to its contraction.

Then, the hydraulic cylinder 31 goes down and the piston 36 inside it goes up.

At this time, the oil in the chamber 35 of the cylinder 31 and the oil in the oil reservoir 60 flow into the other chamber 35 of the piston 31 in the opposite direction to the previous case.

In this case as well, check valve 50 remains open, so piston 36 is free to move.

However, if the safety valve blows out or the pipe 251 suddenly drops due to other reasons, the oil in one chamber 35 of the cylinder 31 will leak into the valve 5 of the check valve 50.
The oil flows from the valve spring chamber to the oil passage 45 through the oil passage cylinder 56 and oil passage hole 57 in 4, but at this time, the pressure inside the oil passage cylinder 56 overcomes the force of the spring 55, , the valve body 54 of the check valve 50 is pressed against the valve seat 46 and closed, stopping the flow of oil.

Therefore, blowing out or other sudden lowering of the safety valve is immediately prevented.

Next, as shown in FIG.
When used as vibration isolators 30□, 303 to prevent 5° from moving suddenly in either the up or down direction,
Check valves 50 are both set within flanges 32,33.

In this way, if the boiler is operated, the pipe 2
5° increases due to thermal expansion, hydraulic vibration isolator 3
Via the connecting pipe 16.17 connected to 0□, 303, the cylinder 31 is raised and the piston 36 is lowered within the hydraulic cylinder 31.

Then, the hydraulic oil in one chamber 34 in the cylinder 31 is pushed by the piston 36 and flows through the flange 32, check valve 50, terminal 38, connecting pipe 42, terminal 39,
It flows into the other chamber 35 of the cylinder 31 via the flange 33, and excess hydraulic oil flows into the oil reservoir 60.

Therefore, the descending piston 36 does not restrict the pipe 25° from moving upward.

Next, when the operation of the boiler is stopped, the thermally expanding pipe 25□ gradually cools down, so that the pipe 25□ descends due to its contraction.

In this case, the cylinder 31 of the hydraulic vibration isolator 30°, 303 is lowered, and the piston 36 is raised inside thereof.

At this time, the hydraulic oil in the chamber 35 of the cylinder 31 and the hydraulic oil in the oil reservoir 60 flow into the other chamber 34 of the cylinder 31 in the opposite direction to the previous case.

In this case as well, since the check valve 50 remains open, the downward movement of the pipe 25□ is not restricted in any way.

However, due to earthquakes, strong winds, and other causes, pipe 2
5□ suddenly moves or vibrates, the valve body 5 in the hydraulic check valve 50 in the chamber 34 or 35 of the cylinder 31
The oil flows from the valve spring chamber to the oil passage port 45 through the oil passage cylinder portion 56 and the oil passage hole 57 of No. 4.

At this time, the pressure of the oil passage cylinder 56 overcomes the force of the valve spring 55, and the valve body 54 of the check valve 50 is pressed against the valve seat 46 and closes, stopping the flow of oil. Movement and vibration can be immediately prevented.

In this way, the present invention does not exert any restraining force against slow movement of pipes, but it can immediately prevent sudden movement of pipes due to vibrations, earthquakes, etc. , it becomes possible to always support the piping system in the best condition.

Furthermore, the device of the present invention is not limited to piping vibration isolation, but can also be used as a reaction force receiver for a safety valve by placing the check valve in only one flange.
It can be widely applied to vibration isolation of rotating equipment, earthquake protection for bridges, etc.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional assembly diagrams showing examples of conventional hydraulic reaction force receivers and hydraulic vibration isolators, and Figures 3 and 4 respectively show examples of arrangement of hydraulic reaction force receivers and hydraulic vibration isolators according to the present invention. FIG. 5 is a cross-sectional assembly view of one embodiment of the hydraulic reaction force receiver or vibration isolator according to the present invention, and FIG. 6 is a detailed cross-sectional view of the check valve. 31...Cylinder, 32, 33...Flange, 42...Communication pipe, 50...Curved check valve.

Claims (1)

[Claims for Utility Model Registration] 1. A cylinder 31 closed at each end by a flange 32.33 is separated into two chambers 34.3 by a piston 36.
Divide into 5, each flange 32°33, each room 34.35
A check valve 50 is arranged inside the oil passage 47, and each flange 32, 33 has an oil passage 45 communicating with the oil passage 47. Terminals 38 and 39 are connected to each other, and these terminals 38 and 39 are connected to the communication pipe
Hydraulic vibration isolators for piping that are interconnected with each other. 2. The check valve 50 is connected to an oil passage 47 formed in each flange 32, 33 so as to communicate with each chamber 34, 35.
a cylindrical valve chamber 51 formed in a cylindrical valve chamber 51; a valve body 54 that is slidably fitted inside the chamber and has a flange 52 formed at one end and a valve portion 53 at the other end; Each terminal 38.3 cooperates with the valve portion 53 of the body 54.
It is interposed between the valve seat 46 formed at the opening of the oil passage 45 of No. 9, the lower surface of the flange 52 of the valve body 54, and the outer end surface of the terminal 38, 39, and keeps the valve body 54 open at all times. The valve body 54 is formed with an oil passage cylinder part 56 in the axial direction, and an oil passage hole 57 is formed in the wall of the valve body 54 so as to communicate with the cylinder part 56 for practical use. A hydraulic vibration isolator for piping according to claim 1 of the patent registration claim. 3. Hydraulic vibration isolation for piping according to claim 1 or 2, in which one of the check valves 50 built into the flange 32 and 33 is removed and used as a hydraulic reaction force receiver. vessel.