JPS5950271A - Bellows - 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 The present invention relates to improvements in bellows, and more particularly to bellows with improved pressure resistance and durability.

Conventionally, when providing a seal part to improve circuitability in a part of the equipment, bellows, especially metal bellows made of phosphorus button 1, ri 1 mount, aluminum outdoor 1, stainless steel, etc. is widely used.

By the way, this kind of bellows made of gold-plated steel includes, for example,
Various types of bellows have been proposed, such as molded bellows with a U-shaped cross section, or welded bellows with an S-shape, Y-shape, etc., and welded both ends of the bellows. When high pressure (for example, external pressure) is applied to these bellows, each bellows undergoes plastic deformation as shown in Figure 1, and due to the residual stress, the deformation does not return even after the pressure has returned, resulting in an extremely short service life. or because the bellows itself is flexible, the spacing (pitch) on one side of each bell becomes uneven and buckles, resulting in local damage to the bellows. However, the hat had the disadvantage of causing 1j4 injuries due to its strength.

Therefore, the inventor conducted extensive research and made a prototype to develop a bellows that not only does not easily undergo plastic deformation even under high pressure, but also prevents damage due to buckling. 7Jr fixed interval 1% on one side of each tongue.
The bellows are aligned in the axial direction with a spacing of iL, and ring members are respectively inserted into the hI red part on one side of these tongues, and these ring members and the bellows are welded to each other to achieve a balancing effect of the ring members. f) It has been found that the purpose of the Rr period can be achieved by configuring the blade to disperse the pressure applied to a portion of each tongue.

Accordingly, a general object of the present invention is to provide a bellows with excellent pressure resistance and durability.

The bellows according to the above-mentioned [failure to fire in order to achieve target 1] is made up of a large number of bellows (and a ring member), and each of the bellows has a predetermined distance βI? + l'M. 11q is formed by arranging 18 rows of R' in the axial direction, inserting a ring member between the tongues, and welding the ring member and the tongue member to each other.

In the above-mentioned bellows, the outer peripheral edge of the ring member and the valley edge of the tongue member can be suitably configured as a 1' external pressure type bellows where the outer peripheral edge of the ring member and the valley edge of the tongue member are connected. By melting the edges of the Y section, it is possible to form an internal pressure type bellows with 'if jfr:1'. In addition, if the hole diameter of the ring member of the external pressure type bellows is set smaller than the distance between the opposing ridges of the bellows, and furthermore, the guide wing is inserted through the hole of the ring member when the bellows expands and contracts, the seating force can be reduced. (411) of the bellows due to T'I] can be completely prevented.

Other objects and advantages of the present invention tJ, from the theory IJj to -I;

Next, an external pressure type bellows will be described in detail as an example of the bellows according to the present invention with reference to the accompanying drawings.

In FIG. 2, the bellows IO according to the present invention consists of a large number of bellows molded with gold thread, such as phosphorous 11゜copper, etc., which are aligned in the axial direction with intervals between the bellows. :
At the same time, insert a spacer ring /4' of constant thickness, for example, made of steel I1, etc., between part U +3/, and IL of 2, and then Each tongue part wing 72 is in contact with the outer peripheral edge of these spacer rings/4'.
It is constructed by melting the valley edge /6 of the In this case, it is preferable to set the hole diameter afL of the spacer ring/hiro hole to be smaller than the distance between the opposing peaks of each tongue member/2 (see Figure 3). .

According to the bellows according to the present invention configured as described above, even when a high output (external pressure) is applied, the pressure is distributed to each bellows by the "balancing action" of the spacer ring inserted between each bellows, and the pressure is approximately evenly applied to each bellows. Because of this, plastic deformation of the bellows can be prevented as much as possible, and buckling accidents can also be prevented, so damage to the bellows can be prevented and durability can be improved.

In addition, when the bellows according to the present invention described above is used as an intermediate valve in a piping system, as shown in FIG.
The end -θ and the valve disk 2.2'f: li:, +I Kl are respectively formed on both ends of the valve body 2, and the end of the valve body 24t, 20 is attached to the piping system 26. Valve mounting part, 2J
' through a gasket (not shown), the valve disc 2.2 faces the three valve boats of the fluid passage 30, and the front 6・311, place 6 lever valve stem 3
By moving the valve forward and backward, the valve boat 32 is opened and closed by the valve disc 2) fixed to the end of the bellows 10.

In this case, the bellows IO distributed in the fluid passage of the piping system
Although the DW and body pressure of the piping system is directly applied to the outer periphery of the bellows IO, this fluid pressure is dispersed and approximately equalized by the balancing action of the spacer ring/4i inserted and attached between each bellows 1 and 2 of the bellows IO. This not only prevents the bellows from being plastically deformed, but also prevents the valve stem from becoming a seat as it can also be used as a guide when the bellows expands and contracts.

Therefore, damage to the bellows due to stress concentration can be prevented and reliability as an intermediate valve can be improved.

Furthermore, Fig. 5 shows the edge of each bellows county phase/K valley iii/, and the hole/I edge of the spacer ring ll/ inserted in the spacer ring P2:(spacer ring ll/ inserted in the space) This is an example of a M-shaped bellows, but this ↓)) case is also similar to the example described above, but only by forcing the young fruit. When compared with the external pressure type instead of the internal pressure type, i! Since the Ir gap (dead base 2) is small, it can be suitably used even when the pressure inside the tongue and the bellows is low.

As mentioned above, according to the bellows according to the present invention, the pressure exerted on the L bellows can be approximately equalized by the balancing action of the spacer ring inserted between each bellow, so that even when high pressure is applied, However, plastic deformation does not occur, so it is possible to improve interpressure properties. Dimensions. (11
- Compared to conventional bellows, buckling is less likely to occur, so it is possible to increase the expansion and contraction dimension, and the damage to the bellows caused by buckling is extremely reduced, so durability can be improved. It has various advantages.

Although a molded bellows has been described above as a preferred embodiment of the bellows according to the present invention, the present invention is not limited to this embodiment, and is also suitable for welded bellows such as S-type and Y-type. The present invention can also be applied to nuclear power-related closed valves that are used under extremely severe conditions due to the handling fluid, or bellows pumps that perform pumping action by the pressure difference between the inside and outside of the bellows. Of course, various design changes can be made without departing from the spirit of the invention.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the manufacturing state of a conventional bellows at n pressure, high pressure, and when returning to normal pressure;
The figure is a cross-sectional explanatory diagram showing a preferred embodiment of the bellows related to an unexploded [Jj], Figure 3 is a cross-sectional explanatory diagram of the main part of the bellows shown in Figure 2, and Figure 3 is a cross-sectional explanatory diagram showing the bellows shown in Figure 3 in a piping system. The cross-sectional explanatory view Kl when used as an intermediate valve is an explanatory plane Nj' showing another embodiment of the bellows according to the present invention. /θ...Bellows /2...Bello one month/≠
... Spacer ring /l ... Valley part 7g ... Hole part )0 ... End ring, 2.2 ... Valve disk j4' ... Center body, 24 ... Piping system
2g...Valve mounting part 30...Fluid passage
32...wo "Boat 34/-...Valve stem FIG, I FIG, 2 1゜FIG, 3 II) 16 FIG 4 FIG, 5
spontaneous) 117jl'lJ 5 1 'I-November δ
-G] 4th and 1st Agency Director Wakasugi fIJ Mr., Mr. (
'l display 1'! (ff157'l!rl:'r19i'lth
IGO939℃2, 1st name], 3rd place, 1st system with borrowed leaves, 1st place for patent, 3-43-2 Tadahisu, Shibuya-ku, Tokyo name
0 1j J Kousou Co., Ltd. (Company Representative I (Otobayashi Part 4, Representative Hitomei.Amendment, q! from page 1, line 4 of the specification to page 2, line 4) “Fraud #r1
Correct the desired range as follows. ``2. Claims (1) The ring f!ls+J is composed of a large number of herose parts and rings f!ls+J, and each of the said herose members is aligned in the axial direction at predetermined intervals!' A HEROUS is characterized in that it is constructed by inserting a ring part into each part of the ring part and further attaching the Korg FF goods 4 to the ring part side. (2) The outside of the ring member The circumferential edge and the hem 1: the trough of the J-Z member. The hem 1 course according to claim 1, which consists of welding the edge. (3) The hole diameter of the ring member is set to 7' ff1.
(Heroze according to claim 1 or 2, which is set smaller than the thickness of the opposing peaks of the shrine. (4) The hole edge of the ring member and the herous concealing member (5) A guide portion +1 is disposed through the hole of the ring member to be inserted into the hole of the ring member during expansion and contraction of the sheath. 1 as set forth in any one of claims 1 to 4 rri.
．． 1-z. -1 2, Mei III Town, page 2, line 19, page 3, line 3, 1
O~11th line, 12th line, 13th line~14th line and 15th line
line, page 4, line 1, line 2, line 3, line 5, line 8,
Lines 10 and 13, page 5, line 5, line 6, 1st
0th line, 12th-13th line, 17th line, 18th line and 1st line
Line 9, page 6, lines 17-18, page 7, lines 6, 7, and 16, and page 13, line 7 [Correct 1-I-J to "Heroes" and 3f. 3. First, correct ``valley edge'' to ``mountain edge'' on page 5, line 1θ of Bright 1flll V. 4. First, correct 1 in the 1st peak of the 13th line of the 5th page of the specification P1 to ``the trough''. 393-

Claims (5)

[Claims] (1) A large number of tongue members and ring members,
Each of the tongue pieces is aligned and arranged in the axial direction at regular intervals (B), link members are inserted between these tongue members, and the ring member and the tongue member are welded to each other. A bellows characterized in that it particularly comprises a bellows. (2) The bellows according to claim 1, wherein the outer peripheral edge of the ring member and the trough edge of the tongue and the moon are welded. (3) Claim 7. The hole diameter of the ring member is set to be smaller than the distance between the opposing peaks of the tongue part. ! J8+ or the bellows described in item 1. (4) The bellows according to claim 1 JJ, which comprises bathing the hole edge of the ring member and the valley edge of the tongue member. (5) The bellows according to any one of claims 1 to j, characterized in that a guide member is inserted through the hole of the ring member when the bellows expands and contracts.