JPS5830574A - Valve - Google Patents

Abstract

PURPOSE:To facilitate replacement of component parts of a valve and inspection and cleaning of the inside of the valve, by fitting a bonnet into a valve body, and assembling all of trim parts such as a plug, a seat ring, etc. in the bonnet. CONSTITUTION:Thread is cut in the inner peripheral surface of an inner chamber 15 formed in a valve body 11, and a bonnet 18 is threaded into the inner chamber 15. A seat ring 23 is press fitted to the lower end of a through-hole 22 formed in the bonnet 18 to extend through the inside thereof at its central part, and a valve shaft 30 associated with the seat ring 23 is inserted into the through-hole 22. Further, bores 33 are formed in the bonnet 18 at its lower part to communicate a fluid outlet passage 17 and an annular chamber 32 with each other. With such an arrangement, the apparatus functions as a valve by moving the valve shaft 30 back and forth and thereby controlling the clearance between the seat ring 23 and a plug 31 formed at the top of the shaft 30. In case of inspection of the inside or replacement of the component parts of the valve, the valve shaft 30, seat ring 23 and plug 31 can be detached altogether by unscrewing the bonnet 18 from the valve body 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve located in a pipeline for controlling the flow rate of fluid.

Various types of valves have been used in the past as this type of valve. Figure 1 shows a cross section of a valve in which the flow rate is adjusted to tm by changing the flow path area between the seat ring and the plug. The figure shows.

In the figure, the upper *lI pipe line and the downstream pipe line! II! A seat ring 2 is screwed into the center of the valve body, and a metal bushing is press-fitted into the seat ring 2 using the valve body 1 and bolts 3. Then, when the Buddha is moved by the upper zero drive section, the flow path area between the tapered seating section and the seating surface of the seat ring 2 changes, and the flow rate of the fluid flowing in the direction of the arrow changes. lI[ix.

For this type of valve, when inspecting, cleaning, or replacing seat ring 2, plug 5, etc., bolt 3 [
The loose pipe is taken out by removing the top cover 4. However, in conventional valves, the main fluid flow path including the seat ring 2 is formed in the valve body Ill, so sufficient inspection and maintenance are required. If you are unable to clean the seat ring and it is necessary to remove the seat ring 2t in order to replace it, you will have to attach and remove the seat ring at the bottom of the deep hole, which is extremely troublesome and requires a long time. there were.

Furthermore, in the one shown in FIG. 2, a long cylindrical trim tube T is provided which is integrated with the seat ring 2 and guide pusher ε shown in FIG. , the fluid flows into the inner chamber ■ and lIl-shaped flow jll and t
It is configured to flow downstream through a plurality of consecutive O horizontal holes 1a.

By doing this, the trim tube can be removed by loosening the tube holder 8, but the trim tube rotis fitting hole is 31
Since the hole shown in Figure 1 is also much deeper, the fit between the trim tube 7 and the hole must be made looser to facilitate attachment and detachment, which reduces the tightness and accuracy of the plug. There were drawbacks.

The present invention incorporates the brass hole 1 in the above points, and a bonnet is fitted to the valve body, a seat ring is fixed to the opening hole on the metal side of the central through hole, and a seat ring is fixed to the opening end on the metal side of the central through hole. Insert the gland member for the seal packing that supports the valve stem so that the plug seating part of the valve stem faces the seat ring, and also install a bonnet between the annular inner chamber between the bonnet and the valve stem and the inner chamber of the valve body. By communicating with each other through nine horizontal holes, when removing the bonnet from the valve body, it is possible to separate the plug, seat cylinder assembly parts, and hole bonnet integrally from the valve body. If possible, we will reduce the inspection, cleaning, and replacement of trim parts and maintenance of the trim parts and the inside of the valve body, and also inspect the seal member mounting part formed inside the valve body after the bonnet is removed, the inside of the valve body, etc. The present invention provides a valve in which inspection and cleaning of the inside of the valve are made easier by forming the valve so that the diameter thereof gradually decreases from the opening side, and the sealing member is also easily attached and detached. υ Below, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 3 shows a sectional view of one embodiment of the valve according to the present invention. In the figure, the valve body 11 has an adapter 12 for connecting the upstream pipe line and an adapter 13 for connecting the downstream pipe line, each of which is screwed into the valve body 11. Each adapter 12. Between the inner hole of Is and the small-diameter inner chamber 14 and large-diameter inner chamber 15 that are continuously formed in the valve body 11,
N connections are provided by channels 16 and 11, respectively.

A thread is cut on the same side of the inner chamber 15, and a bonnet 18 is screwed into the thread, so that the inner chamber 15 is
Most of the interior is closed off by a bonnet 18, forming an annular interior. The bonnet 1 has a large diameter portion 2Ft that engages with the sealing member mounting hole 11 of the valve body fill at the base of the fitting portion that screws into the threaded portion of the inner chamber 1S, and one side of the large diameter portion 20 of the inner chamber 1S. A gasket 21 serving as a rail member is inserted between the bottom surface of the seal member mounting hole 19 and the bottom surface of the seal member mounting hole 19.

The bonnet 18 includes a through hole 22 passing through the center, and a seat ring 23 having a large diameter flange at the center in the axial direction is press-fitted into the open end of the through hole 22 on the main body fitting side. There is. The seat ring 23 has a small diameter portion fitted into the inner chamber 14, and a large diameter flange portion that fits into a large diameter sealing member mounting hole stepped at the open end of the inner chamber 14. Additionally, a gasket 24 as a sealing member is installed in the seal S material installation hole. Further, the inner hole of the seat ring 230 is formed of a straight hole and a tapered O seating surface. The through hole 22 of the bonnet 1@ is bottomed in a 3R shape with a small diameter part into which the seat ring 23 is press-fitted, a medium diameter part continuous to this, and a large diameter threaded part at the other open end. A guide pusher 2s with a flange is fitted into the stepped portion between the small diameter portion and the medium diameter portion. In addition, a packing follower 26 as a gland member for the seal packing is screwed into the large diameter threaded portion with its loosening being regulated by a lock nut 2T, and between this packing follower 2@ and the guide bushing 25. A plurality of V packings 261, each having an annular shape with a semi-circular cross section, are biased toward the packing follower 2611 by a ground spring 29 and installed.

sO is a valve stem which can be moved forward and backward by the bushing follower 2 and the guide bush 25, and extends to the outside of the bonnet 18 via a stem connector (not shown). It is connected to the operation section. This valve stem 30 is sealed with a V-packet 28, and the above-mentioned sealing ring 23 is attached to the tip of the valve stem 30.
The seating part that fits with the same taper as 1lj, and the seat ring 2
A plug 31 consisting of a tapered portion that engages with the straight hole of No. 3 is formed. By operating the I/IA at the operating portion, #i between the plug 31 and the seat ring 23 is formed. The IR stones are laid so that the road area changes. In addition, an annular inner chamber 32 is formed between the bonnet 11 and the valve shaft 30 near the seat ring 23 of the through hole 22, and this annular inner chamber 32 and the annular valve body side inner chamber 15 and are connected by a horizontal hole 33 with a W number of -.

In the valve configured as described above, when fluid flows in from the pipe of the adapter 12 while moving the valve stem 30 back and forth and adjusting the flow pipe between the seating part of the plug 310 and the seating surface of the ring 23. , this fluid flows through the flow path 1 of the adapter 12.
8 flows into the annular inner chamber 32 via the inner part 14 and the flow path of the seating part, and further flows into the horizontal hole 33, the inner part 1!15 and the adapter 1.
It flows into the downstream pipe through the fll ridge 17 of No. 3.

During inspection and cleaning of the inside of the valve body 11, the plug 31,
Inspection, cleaning, replacement, maintenance, etc. of trim parts such as seat ring 23, etc. YrJI! In this case, the bonnet 18 can be removed from the valve body 11 by closing the valve on the pipe Rfa and loosening the large diameter hexagonal part of the bonnet II with a wrench. In this case, the bonnet 11 is equipped with the valve stem 30ii), the plug 31 at its tip, and the seal ring 2s that forms the flow path together with the valve stem 30ii, and these must be removed at the same time. is possible,
However, since these trim parts are exposed to the outside of the bonnet 18, inspection, cleaning, etc. thereof are extremely easy. Further, since the horizontal hole 33 is also provided in the bonnet and is separated from the valve body 11 and exposed, the inner part thereof can be easily inspected and cleaned. These parts are fixed with piping, etc., and are separated from the valve body 11, so they can be carried freely to factories, etc., and they are the most easily damaged among valves, and as a fluid control part. The important seat ring 23 and plug 311 can be replaced with 4 well-equipped facilities and can be maintained. On the other hand, the valve body 11 Confucian #i Bonnetsu) 18tJ! After nine hours of removal, the inside was completely exposed.
This makes it easy to inspect and clean the inner parts 1114 and 15, and to replace the gaskets 21 and 24. In particular, the hole in the valve body 11 extends from the opening 11M to the large diameter stepped portion 1.
9, Inner 1115, Gasket 24 installation part, Inner 1 14
With this in mind, the diameter is gradually reduced in steps, making internal inspection, cleaning, and gasket replacement extremely easy.

In this example, the seat ring 23 is press-fitted into the opening end of the bonnet 11Io, but the seat ring 23 may be fixed by cutting threads in both parts and screwing them together.

As per the above explanation, if pta is clear,
(For valves that control fluid flow noise, there is a bonnet on the valve body)
1- Fit the seat ring 23 to the fitting center opening end of the central through hole, fit the seal packing gland member that pivotally supports the valve shaft into the other opening end, and plug the valve shaft. With the seating area facing the sea), the bonnet and
r between the annular inner chamber between the valve stem and the inside of the valve shell! By using the horizontal hole provided in the Jt bonnet, it is possible to remove the plug, seat ring, and other trim parts such as the 1km net when removing the bonnet due to the force of the valve body. In addition, since the side hole can be separated from the valve body, inspection and cleaning of the side hole, trim parts, and inside of the valve body, as well as replacement and maintenance of IJ parts, can be done very easily and in a short time. This allows maintenance work to be carried out extremely accurately, improving work efficiency and reducing labor. In addition, after the bonnet is removed, the sealing member mounting portion formed inside the valve body, the interior of the valve body, and the opening of the valve body should be configured so that the diameter gradually decreases from the diameter of the opening to the face of the camera section. This further facilitates inspection, cleaning, etc. of the inside of the valve body, and also facilitates attachment and detachment of the seal Sil#9, making maintenance work more accurate and improving work efficiency.

[Brief explanation of the drawing]

Figures 1A and 2 are cross-sectional views of conventional valves, and Figure ** is a cross-sectional view of a valve according to the present invention. 11...Valve body, 14.15...Inner chamber, 11.
...Bonnet, 1$...Seal part V mounting hole, 2
1.24...Gasket, 22...Through hole, 2
3... Seat ring, 26... Packing 7 oror, 28-... Seal packing, 3... ffM
, $1... plug, 32... annular inner chamber, 33...
...Horizontal hole. Patent applicant: Yamakaze no Newael Co., Ltd. Agent: Masaki Yamakawa (and 1 other person) Figure 1 Figure 3

Claims (1)

[Scope of Claims] (a bonnet having a central through-hole and fitted to the valve body; a seat ring fixed to an open end of the ζ0 bonnet on the valve body; and the other open end of the bonnet. A valve shaft is provided with a land member fitted to the seal parapet, and a valve shaft that is supported by the gland member so as to be movable forward and backward, with the seating part of the plug facing the seat 9y, and extending outward.
A valve characterized in that the annular inner chamber near the seat ring between the valve stem and the bonnet and the inside of the valve body are connected by a horizontal hole serving the bonnet. Q) A bonnet having a central through hole and attached to the valve body, a seat ring fixed to the open end of the valve body of this bonnet, and the other side of the bonnet.
A gland member for the seal packing that is moated into part Ia,
The seating part of the plug is attached to the seat ring and extends to the outside.
L nine valve stems, the annular inner part of the seat ring between the valve stem and the bonnet and the inner chamber of the valve body are connected through a horizontal hole provided in the bonnet, and after the bonnet is removed; The diameter of the opening side sealing member mounting hole, the inner side of the valve body, and the deep side sealing member mounting hole formed in the bonnet joint hole in the valve body from the opening side toward the steel part is gradually reduced in diameter in this field. Ky # What was accomplished [q
#Moldy valve.