JPH07310889A - Bellows type vibration control pipe joint provided with multistage type vibration proof rubber - Google Patents

Abstract

PURPOSE:To provide an economical bellows type vibration control pipe joint provided with multistage-type vibration proof rubber, for effectively damping vibration to be transmitted through a pipe itself and vibration to be transmitted in an inner fluid at the same time. CONSTITUTION:A plurality of orifice parts are continuously provided at the specific distances so as to be adjacent to a bellows 2, and in respective orifice parts, movable orifices 3 provided with vibration proof rubber are loosely inserted into respective orifice supporting parts 4 with a clearance in the flowing direction of fluid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bellows type vibration damping pipe joint with a multistage vibration damping rubber suitable for suppressing vibration of pipes and fluids.

[0002]

2. Description of the Related Art A conventional bellows type pipe joint used as an expansion joint for piping is inserted as an expandable bellows 02 between pipes 01, 01 to be joined, as shown in a vertical sectional view of FIG. . However, since a pump is usually inserted in the piping line, vibration often occurs in the pipe itself and its internal fluid. The vibration component of the pipe itself is hardly transmitted to the pipe on the downstream side of the bellows portion 02 due to the buffering action due to the expansion and contraction of the bellows, but the vibration component transmitted through the fluid cannot be attenuated at all by the bellows.

[0003]

Conventionally, as a device for suppressing vibration (pulsation) generated in a fluid, as shown in a longitudinal sectional view of FIG. 3 and a lateral sectional view of FIG. It is known to insert into. In this type of structure, by reducing the diameter of the orifice hole 04, the damping effect can be increased, but at the same time, the flow resistance loss also increases. It is not preferable from the aspect. As described above, in the conventionally known one, vibration propagating in the pipe itself by one mechanical element (pipe joint) is also vibration propagating in the internal fluid (pressure pulsation).
At the same time, it is not possible to effectively dampen.

The present invention has been proposed in view of the above circumstances, and is provided with an economical multi-stage anti-vibration rubber for effectively and simultaneously suppressing the vibration propagating in the pipe itself and the vibration propagating in the internal fluid. An object is to provide a bellows type damping pipe joint.

[0005]

To this end, according to the present invention, a plurality of orifice portions are juxtaposed at appropriate intervals adjacent to a bellows type pipe joint, and each of the orifice portions has a movable orifice with a vibration-proof rubber. It is characterized in that it is loosely inserted into the orifice support part with a gap in the direction of fluid flow.

[0006]

With this structure, when vibration occurs in the pipe itself, the downstream pipe hardly vibrates due to the buffering action due to the expansion and contraction of the bellows. On the other hand, the fluctuation of the movable orifice induced by the vibration generated in the fluid is damped by the vibration damping effect of the vibration damping rubber itself and the damping effect due to the collision and slip between the vibration damping rubbers. Occurred on the movable orifice. Moreover, since there are a plurality of movable orifices, a vibration damping effect far greater than that of a single orifice is achieved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, one embodiment of the present invention is shown in FIG.

In the above figure, a bellows 2 is connected to a pipe 1, and a plurality of orifice portions are connected in series to one end of the bellows 2. Each orifice portion is composed of a movable orifice 3 with vibration isolating rubber, and the vibration isolating rubber movable orifice 3 is supported by an orifice support portion 4 with a clearance δ. An anti-vibration rubber 5 is fixed to the inner side wall of the orifice support portion 4.

[0009]

According to the present invention, by integrating the bellows and the plurality of orifices having the vibration damping effect of the vibration-proof rubber, the deterioration of the operating efficiency of the pump is suppressed as much as possible while operating. The vibration of the pipe itself and the vibration (pulsation) in the fluid that occur are simultaneously suppressed.

In short, according to the present invention, a plurality of orifices are juxtaposed at appropriate intervals adjacent to the bellows type pipe joint, and each of the orifices has a movable orifice with a vibration isolating rubber in each orifice support. Since it is loosely inserted with a gap in the flow direction of the pipe, it is an economical multi-stage bellows type with anti-vibration rubber that effectively suppresses vibration propagating in the pipe itself and vibration propagating in the internal fluid at the same time. The present invention is extremely useful industrially because a damping pipe joint is obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a conventional bellows type pipe joint.

FIG. 3 is a vertical sectional view showing a conventional conduit with an orifice.

FIG. 4 is a transverse sectional view taken along the line IV-IV in FIG.

[Explanation of symbols]

 1 Piping 2 Bellows 3 Movable orifice with anti-vibration rubber 4 Orifice support 5 Anti-vibration rubber

Claims (1)

[Claims] 1. A plurality of orifices are juxtaposed at appropriate intervals adjacent to a bellows type pipe joint, and movable orifices with anti-vibration rubber are provided in each of the orifices in a clearance in the direction of fluid flow in each orifice support. Bellows-type damping pipe joint with multi-stage anti-vibration rubber, characterized in that it is loosely inserted.