JPS62151675A - Flow-passage-closed-type valve leaking no fluid into any part except passage - Google Patents

Abstract

PURPOSE:To surely inhibit any leak by disposing valve guides given constantly effective resilient force by which the guides are pressed to approach each other, between the respective seal faces of respective resilient valve seats and related value boards. CONSTITUTION:When a valve body 6 constituting of valve boards 61 and 62 is forced between the opposed seal faces 71 of a valve seat 7, a coned disc spring 12 is compressed so that the valve boards 61 and 62 constantly make close contact with the seal faces 71 of the valve seat 7 by the compressing force. Valve guides 171 and 172 are pressed by a pair of coned disc springs 18 to the valve boards 61 and 62. Because of the existance of coned disc springs 20, both the valve guides 171 and 172 are forced out from the opposed seal faces 71 of the valve seat 7 in the absence of the valve body 6. When the valve boards 61 and 62 are forced between the valve guides 171 and 172, two valve guides 171 and 172 are moved to the seal face 71 of the valve seat 7 to compress the coned disc spring 20.

Description

[Detailed Description of the Invention] The present invention provides a flow path that prevents the fluid in the piping from leaking into valves other than the passage, and allows the fluid to be shut off or circulated. This relates to a sealed valve.

Contour y rotation - In conventional valves, the valve body guide is fixed to the valve box or valve seat, so a gap is formed between the valve body and the valve body guide, and the valve passes through this gap. It was common for fluid to build up within the valve other than the passageway during valve operation and when the valve was open. For this reason, if the fluid is granular or mixed with granules, or if the fluid leaks into the valve, such as ethylene decomposition gas, carbon etc. may precipitate due to pressure expansion or temperature drop. In a fluid that solidifies, particulate matter accumulates inside the valve, causing various problems such as malfunction of the valve and deterioration of sealing performance.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned difficulties in conventionally known valves and to provide a fluid-tight valve that does not leak fluid outside the valve internal passage member.

In order to achieve this object, the present invention is directed to the first aspect of the attached drawings.
As shown in FIGS. 2 and 2, a pair of hollow cylindrical valve seats 7 are arranged facing each other at a distance from each other in a hollow valve box 3, and the opposing sealing surfaces of these valve seats 7 Between 71 pages, 1
A valve body 6 consisting of a pair of valve plates 6.6□ arranged parallel to each other at intervals is arranged so as to be movable in a direction perpendicular to the center axis of the valve seat 7. Seal surface 7. and each valve plate 6. ．． Valve body guides 16 each having an opening corresponding to the outer periphery of the valve seat 7 are arranged between the valve plates 6 and 62 so that these openings surround the valve seat 7. ．．
62 are always provided with an elastic force in a direction away from each other, and both valve body guides 16 are provided with a flow path that is always provided with an elastic force in a direction toward each other. It features a closed valve.

Operation-U Since the valve body guide 16 exists between the sealing surface 71 of the valve seat 7 and the valve plates 62, 6□, at any stage of relative movement of the valve plates 61, 6□ with respect to the valve seat 7, The fluid passing through the rectifying tube 10 of the valve body 6 is completely prevented from leaking into the valve box 3.

The present invention will now be described with reference to Nos. 1 to 1 of the accompanying drawings showing one embodiment thereof.
A detailed explanation will be given based on Figure 4.

As shown in the figure, a valve 30 according to the present invention includes a horizontal cylindrical body L having a substantially hollow cylindrical shape laterally opened with a fluid passage of 1°, and an upright hollow cylindrical body l perpendicular to the horizontal cylindrical body l. A valve body 3 consisting of a vertical cylindrical body 2 and a hollow rotating elliptical body that closes the upper and lower parts of the vertical cylindrical body 2 of this valve body 3 are placed at a position half of its longitudinal diameter. A pair of upper and lower valve lids 4, 5 each having a cut-off shape, and a horizontal cylindrical body in a hollow space formed by the valve box 3 and both the upper and lower valve lids 4, 5. 1 fluid passage 1
A valve body 6 is arranged to be movable in the vertical center line XX direction of the valve body 3 and both valve covers 4 and 5, which is perpendicular to The valve plate 6 also includes a pair of cylindrical valve seats 7, which are arranged to face each other with a gap between them, forming a fluid passage 7°. ．． The valve body 6 consisting of 6□ is orthogonal to the opposing seal surfaces 71 of both valve seats 7 in order to open and close the opening formed between the seal surfaces 71 of these opposing valve seats 7. It is possible to reciprocate freely. Moreover, as shown in FIG.
It is formed of valve plates 6I and 62 which are substantially rectangular plate-like members, and a fluid passage 10° having an inner diameter corresponding to the inner diameter of the fluid passage 7° corresponding to the inner diameter of the valve seat 7 is provided in the lower part of the valve plate 6I and 62. A cylindrical rectifier tube 10 having
Moreover, both valve plates 6. ．． A hollow cylindrical disc spring case 11 is placed in the space between 62 on the same axis as the rectifier @ 10, that is, on the vertical center line x-x of the valve body 3, and this disc spring case Inside 11,
Four disc springs 12 are arranged, and each valve plate 61
．． At the top of the 6□, a valve body 13 extends outward through the upper valve lid 4, and a pin 14 is attached at its lower end.
It is rotatably stored.

Valve 3 according to the invention having such a clothing-like structure
0. In particular, in order to assemble the valve body 6, as shown in FIGS. 1 and 2, the disc spring case 11 is welded to one valve plate 61 of the valve body 6 at the upper part thereof at the lower part of its outer periphery. The four disc springs 12 are housed inside the valve plate 6I, and the rectifier cylinder 10 is screwed into the corresponding opening at the bottom of the valve plate 6I. , the other valve plate 62 is fitted with the rectifying cylinder 10 into the corresponding opening, and at this time, the rectifying cylinder 10 is inserted into the corresponding opening.
A notch is provided on the outside of the valve plate 6 □, and the gasket 15 is fitted into the notch, and the valve plate 6 □ presses this, thereby creating a gap between the two, that is, the outer circumferential surface of the rectifying tube 10 and the opening of the valve plate 6 □. Try to prevent fluid from leaking through the gaps.

In order to apply an appropriate sealing surface pressure to the packing 15, another disc spring 16 is inserted between the back of the packing 15 and the stepped portion of the notch of the rectifying tube 10.

In this way, the assembled two valve plates 6. .

62, before being assembled into the valve body 3, the opposing sealing surfaces 7. For example, it is wider by about 2 to 51*T11 than the interval between the two. Therefore.

When the valve body 6 consisting of the valve plate 63.6□ is pushed between the opposing seal surfaces 71 of the valve seat 7, the disc spring 12 is compressed, and the compression force causes the valve plate 61.6□ and the valve seat 7 to be compressed. Seal surface 7
, means that they are in close contact at all times.

Furthermore, in the vertical cylindrical body 2 of the valve body 3, on its oppositely formed coaxial cylindrical projections, both valve plates 6. ．． 6
．． By fitting the corresponding openings, a pair of substantially rectangular plate-shaped valve body guides 17. are formed so as to surround the valve seat. ．． 172 are arranged, and these valve body guides 17. ．． 172 are each a pair of disc springs 18 arranged in their upper part between a coaxial cylindrical projection inside the vertical cylinder 2;
are pressed toward the valve plate 6 . ．． A pair of disc springs 20 are arranged between each outer surface of the first flap 2. Due to the presence of these disk springs 20, both valve body guides 17. ．． 17□ is, for example, 2 to 31 from the opposing seal surfaces 71 of both valve seats 7 when there is no valve body 6.
The private detective is made to protrude, and the valve plate 6. ．． 62 to these valve body guides 17. ．． 172, the two valve body guides 17. ．． 1F 26 is the sealing surface 7 of the valve seat 7
1 so that the disc spring 20 is compressed. Due to the compressive force of these disc springs 18 and 20, the valve body guide 17. ．． 172 is the valve plate 6. ．． 62 will always be in close contact with it.

Since the present invention has the above-described configuration, when shutting off, two valve plates 6. ．． 62
is the sealing surface 7. of both valve seats 7. The valve body guide 17. is in close contact with the valve body guide 17. ．． 172 is the valve plate 6. ．． Since it closely adheres to 62,
The fluid does not leak outside of the 1° flow path of the horizontal cylindrical body 1 and the 10° flow path of the rectifying cylinder 10.

1 to hole 11 Since the present invention has the above-mentioned +14 formation and Plants and other equipment equipped with valves can be operated without anxiety. Furthermore, in the valve according to the present invention, steam or an inert gas such as N2 gas is sealed in advance in the valve box from the valve lid, etc., and the pressure and other conditions of the inert gas are determined by the pressure conditions of the fluid flowing inside the valve. By holding the valve body in the same manner as the valve body, leakage of fluid from the flow path of the valve body can be more completely prevented, and a valve of completely sealed flow path type can be obtained.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the valve according to the present invention with the valve body in a fully open state, and FIG.
3 is a partial view of FIG. 1 showing the valve body in a slightly open state, and FIG. 4 is a partial view of FIG. 1 with the valve body in a completely closed state. It is. 1...Horizontal cylindrical body, 2...Vertical cylindrical body, 3...
Valve box, 4.5... Valve lid, 6... Valve body, 6. ．． 6.
... Valve plate, 7... Valve seat, 7, ... Seal surface, 10
... Rectifier cylinder, 11 ... Spring case, 12° + 8.1
8.20... disc spring, 13... valve stem, 15... seal, 17,. 172... Valve body guide.

Claims (1)

[Claims] 1. A pair of hollow cylindrical valve seats are arranged facing each other at a distance from each other in a hollow valve box, and between the opposing sealing surfaces of these valve seats. , a valve body consisting of a pair of parallel valve plates arranged at intervals is arranged so as to be movable in a direction perpendicular to the central axis of the valve seat, and each sealing surface of each valve seat and each valve Valve body guides each having an opening corresponding to the outer periphery of the valve seat are arranged between the plates so that these openings surround the valve seat, and both valve plates are always kept away from each other. A closed flow path type characterized in that an elastic force is applied in the direction of separation, and that both valve body guides are always applied with an elastic force in the direction of approaching each other. valve. 2. Both valve plates constituting the valve body are each made of approximately rectangular plate-like members, and in the space formed between these plate-like members, there is a hollow cylindrical member in the upper part. A disc spring case is arranged in which several sets of disc springs are housed, and their compressive force causes both valve plates to move away from each other, and in this space, at the bottom thereof, a fluid passage 2. The flow path closed type valve according to claim 1, further comprising a hollow cylindrical rectifying tube that forms a flow path. 3. A packing is disposed at the joint between the valve plate and the rectifying cylinder, and the packing is pressed behind by several sets of disc springs arranged between the rectifying cylinder and the valve plate. 2. The flow path sealed valve according to item 1 or 2. 4. Each valve body guide is composed of a substantially rectangular plate member, and a circular opening is provided in the upper part of the guide so as to pass through each valve seat, and around this opening,
Several pairs of disc springs are disposed between the valve seat and the end face of the corresponding opening formed in the valve body passing through the valve seat, and
The lower portions of the valve body guide are connected to each other by a pin,
4. The flow passage sealed valve according to claim 1, wherein several sets of disc springs are arranged between each end of the pin and the valve body guide.