JPS6118289Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a bubble device.

In particular, the present invention relates to a fairly large valve having one inlet and two outlets capable of controlling the flow of a fluid, such as a gas, through a relatively large conduit. For example, the present invention can be used in conjunction with a turbine, such as a gas turbine, to control the flow of gas turbine exhaust gas through either a steam generator or a bypass stand.

Although the devices described above do not need to operate at very high pressures, they do operate at relatively high temperatures, and there are several problems in providing a valve that can operate effectively to close a gas-flowing conduit. . Such conduits may, for example, be rectangular in cross-section with length dimensions on the order of 12 feet (360 cm) and width dimensions in the range of 2 to 3 feet (60 to 90 cm) and therefore carry relatively large amounts of gas. Processed within. The internal temperature of such devices can be in the range of 1000°C (540°C).

In such devices, the closure means must be retained over long distances in controlling flow through the conduit and cannot provide a reliable seal over a wide range of temperatures, which can occur at relatively high temperatures. Have difficulty. For example, if relatively soft materials are to be used reliably to achieve the required sealing effect, such materials often need to be replaced and require, for example, the need to remove and replace numerous bolts. The installation method is difficult due to the following points.

A conventionally known fairly large valve device for controlling the flow of hot gas has been patented in
There are valves such as those disclosed in No. 3,592,221. This valve has a gas inlet on one side and a pair of gas outlets on the other side, and a plate-shaped closing member having a pair of sealing surfaces is swingably installed between the pair of gas outlets. and the sealing surface is configured to seal either gas outlet. However, since the plate-shaped closing member was a disk with a simple shape, the seal when closing the gas outlet was not sufficient.

An object of the present invention is to eliminate the above-mentioned drawbacks, and to improve the sealing performance between the valve seat and the valve closing member even in a relatively large valve device.

The valve device of the present invention includes an endless valve seat member, a valve closing member, and an operating member. The valve seat member includes an outer fixing region fixed to the inner surface of a conduit through which fluid flows, and a rectangular shape provided inside the outer fixing region and lying within a predetermined plane substantially perpendicular to the flow direction of the fluid passing through the conduit. an inner sheet region 26 terminating in an endless sheet surface of
The seat surface thus defines a rectangular opening through which fluid flows. The valve closing member engages the seating surface in a closed position to close the rectangular opening defined thereby, and the valve closing member engages the rectangular opening defined by the seating surface in the closed position of the closing member. A dish-shaped member made of a resilient sheet material having a hollow interior facing toward the. The disc-shaped spring member has a central region located upstream of the plane when the closure member is in the closed position and a resilient endless peripheral region that engages the seat surface in the plane; A resilient endless peripheral region lies in a plane at a predetermined distance from a central region of the dish-shaped member in the unstressed state of the resilient sheet material. the operating member includes a movable frame fixed to the dish only in the central region of the dish for moving the dish from an open position remote from the opening to a closed position; The portion of the dish disposed outwardly beyond the central region is capable of deflecting upon engagement with the seat surface, such that in the closed position the peripheral region is closer to the center than the predetermined distance. the resilient surrounding area is pressed against the seat surface in the closed position of the closure member, and a backup seat is secured between the frame and the dish-shaped member. There is.

The backup seat supports a first restriction member that restricts the range of deflection of the dish-shaped member toward the backup seat, and the first restriction member extends around the backup seat and is attached to the dish-shaped member. It is characterized in that it is provided at a position corresponding to the periphery of the seat surface on the back of the seat.

The back-up sheet also carries a second limiting member that also limits the deflection range of the dish-shaped member in the opposite direction.

In the valve device of the present invention, in addition to the valve closing member being composed of a spring seat, it is also dish-shaped so that when the valve is closed, the convex side is located on the upstream side of the fluid flow. Therefore, when fluid pressure is applied to the valve closing member, the valve closing member is more firmly pressed against the seat surface. Therefore, even if the valve seat surface is large and rectangular, the endless seat surface A strong and reliable seal can be achieved all around the circumference. In addition, in the present invention, a back-up seat is provided between the closed position and the frame, so that under normal conditions, when the valve is closed, the peripheral area of the dish-shaped closing member contacts the back-up seat. After the peripheral area of the dish-shaped closure member contacts the back-up sheet, the back-up seat limits further deflection of the dish-shaped closure member and is completely pressed against the seat surface. This ensures a more complete seal of the valve. Further, in the present invention, a backup seat is provided between the closing member and the frame.
Therefore, under normal conditions, when the valve is closed, the dish-shaped closure member is able to flex until its peripheral area comes into contact with the backup seat; After this, the back-up seat limits further deflection of the dish-shaped closing member and comes into full pressure contact with the seat surface, ensuring a more complete seal of the valve.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

The valve of the present invention includes an endless valve seat 10 shown on the left side of FIG. The endless valve seat 10 has an outer fastening region 12 which can be fastened to the inner surface of a fluid-flowing conduit. Thus, FIG. 2 specifically shows a pair of valve seats 10 which are fastened in a suitable manner to the inner surfaces of a pair of conduits 14, 16 interconnected at a corner 18. As is apparent from FIG. 2, the inner surfaces of conduits 14, 16 and corners 18 are covered with a suitable resistive thermal insulator 20. Valve seat 10 has an external flange 22 secured directly to the inner wall surface of each conduit 14, 16 by suitable bolts, welding, or the like. This flange 22
is fixed to a web 24 perpendicular to this flange 22, so that this part of the structure has an extended cross-section T
It forms a rod-shaped structure. This rectangular T-shaped bar structure part 2
The inner circumferential edge region of 2, 24 has an extended endless web 26 fixed thereto, for example by welding, which web 26 extends perpendicularly from the web 24 and terminates at a point forming an endless sheet surface 28. The shape of the endless sheet surface 28 is clear from FIG.
Here, the web 26 is shown as having curved corners.

The construction of valve seat 10 is best shown in FIGS. 4-7. As mentioned above, the valve of the present invention
Suitable for operating at temperatures around 1000㎓ (540℃). For example, the valve of the present invention can operate in a temperature range of about 1200°C (650°C) in this embodiment. Thus, as stated earlier, 12
Tolerances for expansion and contraction must be established taking into account the large dimensions that can be on the order of 3 feet (360 cm) high and 2-3 feet (60-90 cm) wide or more. In the embodiment of the valve with internal insulation as shown, the webs 24, 26 are provided with grooves to compensate for differential thermal expansion between the relatively cold outer walls of the valve body and conduit and the hot valve seat. A series of spaced apart slits 30 are formed as clearly shown in FIGS. 6 and 7. These slits 30 are in turn covered by flexible sheet material 32. Sheet material 32
is in the form of a suitable metal flake of thin flexible sheet material which is welded to the webs 24, 26 across the slit 30 thereof in the manner clearly shown in FIGS. 6 and 7. . Each cover member 32
has a body region 34 in line with the slit 30 which can follow expansion and further recover the shape of the body during contraction, thus allowing the structure to expand and contract with temperature changes. Despite this, a seal can be maintained at the slit 30.

It will be appreciated by those skilled in the art that if it is necessary or desirable to provide thermal insulation on the outside of the valve and conduit, the temperature differential that will exist between the valve body and the seat will be very small and the need for slit 30 and cover 32 will be eliminated. It will be easily understood.

Thus, the seat surface 2 of each valve shown in FIG.
8 is located in a plane substantially perpendicular to the fluid flow direction. In the embodiment shown in FIG. 2, conduit 14 conducts the exhaust gas from the gas turbine to the boiler, while conduit 16 conducts the exhaust gas from the turbine through a suitable stand to the vent.
The endless seat surface 28 of each valve thus defines an opening through which fluid flows.

Valve closing means 36 are provided in cooperation with the valve seat 10 at the seat surface 28. In the embodiment shown in FIG. 2, a pair of valve closing means 3 respectively cooperate with a pair of valve seats 10.
There are 6. A pair of valve closing means 36 are carried by a suitable door frame 38 forming part of an operating means 40, which operating means is a hollow rotating shaft fixedly supporting frame 38 in a manner as described below. Equipped with 42.

Each valve closure means 36 includes a disk-shaped spring member 44 made of springy sheet metal and having an endless springy peripheral region 46 cooperating with the seat surface 28 . The peripheral region 46 may be integral with and form a part of the remainder of the spring disc member 44, or may be welded along the edge of the sheet metal body forming the remainder of the spring disc member 44. It takes the form of separated thin members that are fastened together. The closing means 36 cooperating with the valve seat 10 secured to the conduit 14 is shown in its closed position in FIG. upstream of the opening. Inside its peripheral region 46 the dish-shaped member 44 has a central region 48 . When the closure means 36 is not compressed, its central region 48 is separated from the plane of the peripheral region 46 by a greater distance than when the closure means 36 is in the closed position, so that the peripheral region 46 is reliably solid. The seat surface 28
The spring force of the spring sheet material is also used to press against the material. The surrounding area 46 is the endless sheet surface 28
and in a plane perpendicular to the plane of the web 26 which presses against the seat surface 28 when the closing means 36 is in its closed position.

The frame 38 includes a number of frame units 5 which protrude radially from the hollow rotating shaft 42 and are fixed to precisely shaped frame end thin plate members 52.
Contains 0. These members 52 are welded or otherwise secured to the hollow shaft 42, while the radially extending frame unit 50 may be made of suitably shaped bars that can be welded together, for example.

Several frame units 50, distributed along the shaft 42 in the manner clearly shown in FIG.
These strips extend between and are welded to the frame units 50, as clearly shown in FIG. A pair of disk spring members 44 of pair of closure means 36 are bolted directly to these rectangular frame members, some of which are shown in FIG.

However, each disk-shaped spring member 44 and frame 38
In between, a backup sheet member 62 is provided over the entire rear side of the rectangular member 44. In the embodiments, corner regions are shown cut away for simplicity.

On the rear side of the peripheral sealing area 46 of the spring dish-shaped member 44, the back-up seat member 62 is provided with a number of limiting projections 64, which are connected to the closure means 3.
6 is in a position aligned with sealing surface 28 when in the closed position. Thus, the shielding or compression in the peripheral area 46 of the disc-shaped spring member 44 is limited to the limiting member 64.
Therefore, in this structure, after the spring gate has been shielded to a predetermined extent, the limiting member 64 limits further shielding and limits the shielding to the surrounding area. It will be appreciated that 46 is pressed completely against seat surface 28.

The second limiting means limits the movement of the peripheral area 46 away from the backup seat 62 in the opposite direction. Thus, as seen in FIG. 8, dish-shaped member 44 is provided with a series of openings 66 inside and adjacent peripheral region 46. The shank portions 68 of the plurality of bolts 70 extend through the apertures 66;
These bolts 70 are fastened to the backup seat 62 as shown in FIG. Bolt 70 has a head 72 that is larger than opening 66. . Thus,
In this device, if the surrounding area 46 tends to undesirably strain and undesirably move away from the back-up seat 62 due to thermal stresses or the like, the limiting means formed by the bolts 70 may cause the spring gate 44 to Limit the range of deformation.
Therefore, in this device, the disc-shaped spring member 44
The peripheral region 46 of the valve is positioned such that it lies against the inner surface of the web 26 and provides reliable valve operation even under the most extreme operating conditions.
The limiting function of the bolt head 72 effectively prevents any unfavorable outward deformation of the surrounding area, such as, for example, the surrounding area 46 not engaging the seating surface 28 and thus allowing high velocity gas to flow directly through the conduit. do.

As mentioned above, the operating means 40 includes a hollow extension shaft 42, and the closure means pivots about the axis of the shaft between alternating closed positions within the conduit. The elongated hollow shaft 42 fixedly carries at its lower end a plug 74 (FIG. 3), which plug is mounted on a block 78 supported in a suitable frame 80.
has a downwardly facing convex spherical surface 76 received within a correspondingly shaped concave surface of the block 78, so that as a result of this simple construction, the entire weight and moment of the assembly is carried by the block 78 while the shaft 42 is rotated along its axis. Rotate freely around.

The shaft 42 has another plug 8 at its upper end.
2, the plug has a protruding non-circular portion 84 of square cross-section suitable for being fixed to the shaft 42 in any suitable manner and, for example, to a lever 86 for rotating the shaft 42 about its axis. At its upper end, the shaft 42 connects the conduit 1
4, 16 in suitable bearings 88 carried by the structure connecting them. Lever 86 may be operatively connected to a suitable operating mechanism, such as, for example, hydraulic operating mechanism 90 schematically shown in FIG. operatively connected via a pinion gear.

On the other hand, in embodiments of the invention in which the shaft 42 is shown initially oriented in a vertical position, one skilled in the art would be able to construct many other bearing assemblies to rotatably support the shaft in different positions. would be easy to do. For example, if additional drive torque is required for a suitable seat, the lower end of shaft 42 could be extended out of the conduit with additional rack and pinion arrangement for operating the valve.

Thus, the extremely simple textured structure described above allows each closure member 36 to be quickly pivoted between its closed and open positions, and furthermore, when one of the conduits 14 is closed, the other conduit 16 is not required. open, the exhaust air is not completely blocked at any time, thus achieving a safe operation of the valve device according to the invention. If desired, the valve can be located in an intermediate position between the seats so that both outflow conduits 14,
It is also possible to flow fluid through 16.

Furthermore, it should be noted that the sides of the pair of valve closure means 36 remote from the shaft 42 are closer together than those sides closer to the shaft 42. A pair of closing means 36
This inclined configuration is particularly evident from FIGS. 2 and 4. Thus, the radially extending units 50 of the frame 38 terminate in extensions converging in the mutual direction, such that the pair of valve means 36 are mounted with respect to each other in the converging manner shown in FIGS. I understand that. Moreover, the movable means 40
It is noted that when the valve is moved to close one of the valve holes and open the other valve hole, the shaft 42 is rotated through an angle somewhat greater than 90 degrees. As a result of this construction, it is possible to reliably position each valve closing means 36 properly seated against the seating surface 28.

As is clear from the above description, the valve described above operates in a manner similar to a door where the gate sits against the jamb. The seat surface 28 corresponding to the jamb is precisely manufactured and of a thermally stable configuration in order to ensure contact with the springy surrounding area of the spring-swivelable gate along its entire circumference. . The conduits are thermally insulated on their inner surfaces to reduce metal heat in the conduits. When the gate's springy surrounding area engages the seat surface, the gate deforms elastically, and the spring structure is able to compensate for fixed seat height variations by deformation of the springy surrounding area of the gate. It is natural that The torque applied through the rotating shaft of the movable means is sufficient to deform the spring sheet metal within the elastic limits of the spring metal.
The seating force required for metal-to-metal sheets is typically 2 to 6 times the force created by the pressure differential acting on the spring gate when contacting the sheet surface by the fluid in the conduit system. Disc-shaped spring member 44
is arranged such that the force due to the pressure difference acting on it by the fluid in the conduit under normal conditions is in the same direction as the externally applied seating force.

This metal-to-metal seat provides a much more durable valve construction than flexible seat mechanisms that require frictional return and complex attachment methods.

Also, as previously noted, the spring-type valve configuration compensates for slight fixed seat distortions due to temperature changes, especially when the valve is closed. Furthermore, a simple rotation of only slightly more than 90 degrees as described above to close one valve and open the other may itself be effected by a simple rack and pinion or other actuating mechanism as described above. is possible,
This simple valve action thus enables quick closing or opening to be achieved. The arrangement of the invention is also inexpensive, simple in construction, requires minimal maintenance, and at the same time is extremely safe since at least one of the aforementioned conduits is always open.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of an embodiment of a valve device of the present invention having a main body containing a heat insulating material therein, and FIG. 2 is a schematic cross-sectional view taken along line 2--2 in FIG. Furthermore, a portion of a conduit provided with the valve structure of the present invention is also shown, with FIG. 3 being a partial cross-sectional side view of the valve of the present invention taken along line 3--3 in FIG. 2, and FIG. 4 showing the configuration of FIG. 2. FIG. 5 is an enlarged cross-sectional view taken along line 5--5 of FIG. 3, showing it in more detail than FIG. 3; FIG. A partially exploded perspective view of the valve seat means, FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 6 in the direction of the arrow, and FIG. 8 is a cross-sectional view taken in the direction of the arrow along line 8-8 in FIG. FIG. 3 shows means for limiting the peripheral area of the dish-shaped member of the valve of the present invention. 10... Valve seat means, 12... Outer fixing region, 14, 16... Conduit, 24, 26... Web, 28... Endless seat surface, 36... Valve closing means, 38... Frame, 40... ...Operating means, 4
4...Spring dish-shaped member, 46...Endless surrounding area,
48...Central region, 62...Backup sheet, 64...Limiting member.

Claims (1)

[Claims for Utility Model Registration] The valve seat member 10 includes an endless valve seat member 10, a valve closing member 36, and an operating member 40; and an inner sheet region 26 disposed inside the outer fixed region and terminating in a rectangular endless sheet surface 28 lying in a predetermined plane substantially perpendicular to the direction of fluid flow through the conduit. the seating surface defines a rectangular opening for fluid flow; the valve closing member 36 engages the seating surface 28 in a closed position to close the rectangular opening defined thereby; a dish-shaped member 44 of a resilient sheet material having a hollow interior towards the rectangular opening defined by the sheet surface in the closed position of the closure member; a central region 48 located at one time upstream of said plane and a resilient endless peripheral region 46 engaging said sheet surface within said plane, said resilient endless peripheral region 46 being located on the non-resistance of said resilient sheet material. the operating member 40 is located in a plane at a predetermined distance from a central region of the dish in a compressed state; a movable frame 38 fixed to the dish 44 only in said central region 48;
, the portion of the dish disposed outwardly beyond the central region 48 is capable of deflecting upon engagement with the seat surface 28 such that in the closed position the peripheral region 46 extends beyond the central region 48 . located closer to said central region 48 than a predetermined distance, said springy peripheral region being pressed against said seat surface in the closed position of said closure member, and further connected to said frame 38 and said dish-shaped member 44. A backup seat 62 is fixed between the valve opening position and the peripheral portion of the backup seat 62 is separated from the frame 38 and the dish-shaped member 44, and the backup seat 62 is separated from the frame 38 and the dish-shaped member 44. A rectangular first limiting member 64 that regulates the range of deflection of the shaped member toward the backup seat side.
The first limiting member 64 extends around the backup seat and is provided at the back of the dish-shaped member 44 at a position corresponding to the periphery of the seat surface 28; A valve device characterized in that it also supports a second limiting member 70 that limits the deflection range of the dish-shaped member in the opposite direction.