WO2017056328A1

WO2017056328A1 - Panel valve sealing structure and gasket packing

Info

Publication number: WO2017056328A1
Application number: PCT/JP2015/078123
Authority: WO
Inventors: 直文吉見
Original assignee: 株式会社市丸技研
Priority date: 2015-10-02
Filing date: 2015-10-02
Publication date: 2017-04-06
Also published as: JPWO2017056328A1; JP5982076B1

Abstract

A sealing structure 1, which is an example of a panel valve sealing structure in which the present invention has been applied, is provided with a body plate 2, gaskets 3, and inner spring members 4. Same are integrated and disposed between the joining surfaces of a panel valve and a panel block, and an external force is applied to clamp and fix the body plate 2. The body plate 2 is configured from a flat metal plate. Two gasket through holes 5 are formed in the body plate 2 and the gaskets 3 are fitted inside the gasket through holes 5.

Description

Panel valve seal structure and gasket packing

The present invention relates to a panel valve seal structure and a gasket packing. Specifically, the present invention relates to a panel valve seal structure and a gasket packing that are excellent in handling property and structural stability and can sufficiently ensure the airtightness of the installation location.

A panel valve for controlling the fluid is used in the piping structure. The panel valve is used to collect a plurality of valves in one place and unitize them, and is attached to a panel block provided on the piping structure side.

The panel valve can be replaced only in the valve part, unlike the flange valve attached to the flange provided in the pipe. Further, there is an advantage that the flange portion and the piping are not easily distorted when the valve is replaced.

At the joint between the panel valve and the panel block on the piping side, a substantially vertical surface is formed on both. In addition, a fluid path is provided in each interior, and the positions of the paths are aligned and the surfaces are joined together to be fixed by applying a force from the outside.

Also, a sealing member is disposed at the joint between the panel valve and the panel block in order to make the region airtight. For example, when the fluid is at a relatively low pressure, a simple seal structure is employed in which a sheet-like gasket is sandwiched between the panel valve and the panel block. A force is applied from the outside to the joint between the panel valve and the panel block, and a sheet-like gasket is sandwiched between the panel valve and the panel block so as to be fixed.

When the fluid flowing through the piping structure is steam or high-pressure gas, high-temperature and high-pressure compatible gasket packing is used as a sealing member from the viewpoint of durability. The gasket packing is formed by spirally winding a thin metal plate and is formed in a spiral shape, and its size is defined by the standard.

Here, it was difficult to arrange the gasket packing while aligning the positions of the panel valve and the panel block formed on the substantially vertical surface. It is difficult to hold the gasket packing in an appropriate position, and the gasket packing falls off during alignment.

In addition, there was a problem that the structure of the end portion on the inner peripheral side of the idle gasket packing, that is, the metal flake on the start position side of the idle winding, was changed by the pressure of the fluid. Specifically, as shown in FIG. 4, there is a problem in that the metal thin piece wound away from the inner peripheral side end portion 400 in the direction of the central axis of the gasket packing and interferes with the internal structure of the panel valve. there were.

Under such circumstances, there is a panel valve seal structure in which gasket gasket is easily attached. For example, a seal structure described in Patent Document 1 has been proposed.

Patent Document 1 describes a seal structure 100 shown in FIG. The panel valve 101 has a substantially vertical valve side connection surface 102, and the panel block 103 provided in the piping structure has a substantially vertical block side connection surface 104. A fluid path is provided inside the panel valve 101 and the panel block 103. The panel valve 101 is provided with a valve body that controls the flow of fluid in the fluid path inside the valve body 105.

In addition, the seal structure 100 includes a gasket 106 that makes the joint between the panel valve 101 and the panel block 103 airtight. Further, an annular recess 107 is formed at the mouth edge of the fluid path of the valve side connection surface 102.

In the seal structure 100, the gasket 106 is attached to the annular recess 107 of the valve-side connection surface 102, thereby preventing the gasket 106 from falling off when fixing the joint portion.

In addition to the seal structure 100 described above, several panel valve seal structures have been proposed.

For example, in the seal structure 200 shown in FIG. 6, a collar 202 attached to the inner peripheral side of the gasket 201 is used. The collar 202 is fitted to the inner periphery of the spiral wound gasket 201 and can be attached to a collar recess 204 provided on the block-side connection surface 203.

Further, in the seal structure 300 shown in FIG. 7, an integrated gasket 301 in which the collar and gasket of the seal structure 200 are integrated is used. In addition, the integral gasket 301 has a convex portion 302 formed in a collar region, and the convex portion 302 can be attached to an annular concave portion 304 provided on the panel side connection surface 303.

Furthermore, with regard to structural changes on the inner peripheral side of the metal flakes, attempts have been made to cope with a structure in which the gasket packing strength is increased. Here, winding is performed stronger than the conventional gasket packing, and the gasket packing is hardened and the strength is improved.

JP 2004-044634 A

However, in the seal structure 100 described in Patent Document 1, the gasket is still dropped and is not easily attached. Moreover, the structural change of the inner peripheral side of a metal flake will also arise.

In the seal structure 200 shown in FIG. 6, the area on the inner peripheral side of the gasket is occupied by the collar, and the path through which the fluid passes becomes small. As a result, the flow coefficient (Cv value) of the panel valve is reduced, which affects the performance of the valve that controls the fluid.

More specifically, in order to obtain the same performance as the panel valve before attaching the collar, it is necessary to enlarge the valve itself. This is not preferable in applications where the panel valve is required to be downsized, for example, for use in a tire vulcanizer. Furthermore, since the collar-side concave portion 204 is provided on the block-side connection surface 203, labor and cost are increased.

Further, in the seal structure 300 shown in FIG. 7, it is unclear how much the shape of the gasket is deformed by the tightening force for making the joint region airtight when the integral gasket 301 is fixed between the joint regions. It has become. Therefore, it is difficult to determine the shape and attachment position of the color part to be integrated.

Also, in applications that require a reduction in the size of the panel valve, since the valve itself is small, an area where the annular recess 304 can be processed on the panel side connection surface 303 is limited. As a result, there is a problem that the annular recess 304 that can sufficiently hold the integral gasket 301 is difficult to process.

In addition, the gasket packing that has been tightly wound and increased in strength results in insufficient airtightness in the joining region. This is due to the fact that even if the gasket packing whose strength is increased by the force of holding and fixing a normal standard gasket packing is tightened, the gasket is not sufficiently tightened and a gap is formed.

The present invention was devised in view of the above points, and provides a panel valve seal structure and a gasket packing that are excellent in handleability and structural stability and that can sufficiently ensure the airtightness of the installation location. Objective.

In order to achieve the above object, a sealing structure for a panel valve according to the present invention includes a flat plate body having at least two through holes and a gasket that is formed in a substantially donut shape and can be fixed to the through holes. A packing and a substantially C-shaped inner member that can be fitted inside the gasket packing and have an outer periphery larger than the inner periphery of the gasket packing.

Here, the fluid can flow through the through hole of the plate body. That is, it can be made part of the inflow and discharge paths by matching the position with the fluid path provided inside the panel valve side or the panel block side.

Also, since the plate body is flat, it can be fixed with the plate body sandwiched between the panel valve and the panel block. Further, since the plate body can be attached and attached, it becomes easy to attach.

Also, the gasket packing that is formed in a substantially donut shape and can be fixed to the through hole allows the area where the panel valve and the panel block are joined to be airtight while allowing fluid to flow. Further, the gasket packing can be made difficult to fall off.

Further, the inner peripheral side of the gasket packing can be suppressed by the inner member by the substantially C-shaped inner member that can be fitted inside the gasket packing. That is, for example, the inner member suppresses the inner peripheral side end portion of the donut-shaped gasket packing in which the thin metal plate is idled.

Also, the inner member can be fitted inside the gasket packing, and the inner member having a larger outer periphery than the inner periphery of the gasket packing makes it difficult for the inner member to come off from the inner side of the gasket packing. That is, when the inner member is fitted inside the gasket packing, the outer diameter of the inner member is reduced, and after the fitting, the force that the inner member returns to the original shape acts as a fixing force.

In addition, when the gasket packing has a spiral shape in which a metal plate with a convex portion formed in the center and a soft filler material are wound on top and bottom in two layers, it is configured by winding an existing metal thin plate idle. Spiral wound gasket packing can be used. Further, the gasket packing can be fixed by sandwiching the convex portion of the metal plate.

Further, when the first recess into which the inner member can be fitted is formed inside the gasket packing, the inner peripheral side of the gasket packing can be more sufficiently suppressed by the inner member.

In addition, a second recess into which the gasket packing can be fitted is formed in a region facing the through hole of the plate body, and the end portion of the metal plate on the outer peripheral side of the gasket packing is separated from the metal plate inside the region. In this case, the gasket packing is more difficult to drop off. That is, for example, the convex portion of the metal plate of the gasket packing fits into the second concave portion of the through hole and is difficult to come off. Further, the region of the end portion of the gasket packing is raised from the inner peripheral surface, and the repulsive force generated by suppressing the portion can be used for fixing the gasket packing to the plate body. More specifically, when the gasket packing is fitted to the second recess of the through hole, the raised portion of the end portion of the metal plate on the outer peripheral side of the gasket packing is suppressed, and after the fitting, the raised portion is the original. The force to return to the shape works as a fixing force.

Further, when the plate body is constituted by two flat plate members, and the gasket packing is fixed by holding the convex portion between the plate members, the gasket packing is fixed by sandwiching the two gaskets between the two plate members. Thus, the gasket packing can be made difficult to fall off.

In order to achieve the above object, the sealing structure of the panel valve of the present invention includes a panel block having a first joint surface and a panel valve having a second joint surface facing the first joint surface. And at least two through-holes, and a flat plate body disposed between the first joint surface and the second joint surface, and the plate body provided on the same plane as the plate body A projecting piece projecting from between the first joint surface and the second joint surface, a gasket packing formed in a substantially donut shape and fixed to the through hole, and fitted inside the gasket packing. And a substantially C-shaped inner member having an outer periphery larger than the inner periphery of the gasket packing.

Here, the panel valve having the first joint surface and the panel valve having the second joint surface opposite to the first joint surface can be installed in a piping structure through which fluid flows.

In addition, at least two through-holes are formed, a plate-like plate body disposed between the first joint surface and the second joint surface, and the plate body is provided on the same plane as the plate body, The state where the plate body is attached between the panel block and the panel valve can be easily confirmed by the protruding piece protruding from between the first joint surface and the second joint surface. That is, when the plate main body is sandwiched and fixed between the first joint surface and the second joint surface, the protruding piece portion can be visually recognized to know whether or not it is attached.

Further, in order to achieve the above object, the gasket packing of the present invention has a spiral shape in which a metal plate having a convex portion formed at the center and a soft filler material are wound in two layers on top and bottom, An end portion of the metal plate on the outer peripheral side is formed away from the metal plate inside the region.

Here, the gasket packing has a spiral shape in which a metal plate and a soft filler material are wound in two upper and lower layers, and the end of the outer peripheral metal plate is separated from the inner metal plate of the region. By being configured, the region of the end portion of the gasket packing is lifted from the inner peripheral surface, and the repulsive force generated by suppressing the portion can be used for fixing the gasket packing to the attachment location. That is, for example, if a recess or a through-hole for mounting the gasket packing is provided and the gasket packing is fitted there, the raised portion of the end of the metal plate on the outer peripheral side of the gasket packing is suppressed, and after the fitting, The force at which the raised part returns to the original shape works as a fixing force.

The seal structure of the panel valve according to the present invention is excellent in handleability and structural stability, and can sufficiently secure the airtightness of the installation location.
In addition, the gasket packing according to the present invention is excellent in handleability and structural stability, and can sufficiently secure the airtightness of the installation location.

It is the schematic which shows the seal structure to which this invention is applied. It is the schematic which shows the structure of a main body plate. It is the schematic (a) of a gasket and a C-shaped spring, the schematic (b) of the conventional gasket, and the schematic sectional drawing (c) around the through-hole of the seal structure to which the present invention is applied. It is the schematic which shows the state which the structure of the edge part of the inner peripheral side of the gasket packing which wound the metal thin piece changed. It is the schematic which shows the sealing structure of the conventional panel valve | bulb. It is the schematic which shows the sealing structure of the conventional panel valve | bulb. It is the schematic which shows the sealing structure of the conventional panel valve | bulb.

Hereinafter, embodiments of the present invention will be described with reference to the drawings to facilitate understanding of the present invention.
FIG. 1 is a schematic view showing a seal structure to which the present invention is applied. In addition, the structure shown below is an example of this invention and the content of this invention is not limited to this.

As shown in FIG. 1, a seal structure 1 as an example of a seal structure of a panel valve to which the present invention is applied includes a main body plate 2, a gasket 3, and an inner spring member 4. These are integrated and disposed between the joint surfaces of the panel valve and the panel block, and are fixed by sandwiching the main body plate 2 by applying a force from the outside.

The main body plate 2 is composed of a flat metal plate. The main body plate 2 has two through holes 5 for gaskets, and the gasket 3 is attached to the inside of the through holes 5 for gaskets.

The gasket 3 is a member for bringing the fluid path at the joint surface of the panel valve and the panel block into an airtight state. The inside of the substantially donut-shaped gasket 3 is a portion through which fluid flows.

The inner spring member 4 is attached to the inside of the gasket 3 and serves as a member for suppressing an end portion on the inner peripheral side of the gasket described later.

The detailed structure of each member will be described.

As shown in FIG. 2, the main body plate 2 is formed by stacking two metal plates 6 having the same shape and fixing them with screws. Each metal plate 6 is formed with a through hole 7 to be a gasket through hole 5. The through-hole 7 has a hole diameter that increases from one surface to the other surface.

In the state where the two metal plates 6 are overlapped, the surfaces of the through holes 7 having larger diameters come into contact with each other. Thereby, it becomes the shape by which the recessed part was formed in the area | region facing the through-hole 5 for gaskets of the main body plate 2. As shown in FIG. This structure will also be described with reference to FIG.

The main body plate 2 is provided with a protruding piece 8. The projecting piece 8 is a portion that is located outside the region surrounded by the joint surface in a state where the main body plate 2 is sandwiched between the joint surfaces of the panel valve and the panel block and becomes a visible portion.

Here, the main body plate 2 does not necessarily have to be configured by overlapping two metal plates 6 having the same shape, and may be configured by, for example, a single metal plate.

Further, the protruding piece 8 is not necessarily provided on the main body plate 2. However, it is preferable that the projecting piece 8 is provided on the main body plate 2 from the viewpoint that it can be easily recognized whether or not the main body plate 2 is attached.

As shown on the left side of FIG. 3 (a), the gasket 3 has a substantially donut shape. The gasket 3 is formed by superimposing metal flakes and a soft filler material on top and bottom, and spirally wound so as to be laminated on the outside from the end that is the starting point. Moreover, the metal flakes are processed so that the central part in the width direction is convex.

Further, in the metal flake on the outer peripheral side of the gasket 3, the end portion ahead of the welded portion 9 is a free end 10 that does not contact the inside. When a force is applied to the free end 10 in the direction in which the free end 10 is brought into contact with the inside, a repulsive force is generated to return to the original shape. The length of the free end 10 is about a quarter of the circumferential length of the outermost periphery of the gasket 3.

FIG. 3 (b) shows an existing spiral wound gasket, and the existing gasket is welded and fixed at the edge 11 on the outer peripheral side of the thin metal piece.

Here, the length of the free end 10 does not necessarily need to be about one-fourth of the circumferential length of the outermost periphery of the gasket 3, and it is sufficient if a certain free end is provided. However, in order to obtain a sufficient fixing force of the gasket 3 to the main body plate 2, the length of the free end 10 is preferably about a quarter of the circumferential length of the outermost periphery of the gasket 3.

As shown on the right side of FIG. 3A, the inner spring member 4 has a substantially C-shape. The inner spring member 4 is formed by bending a stainless steel circular casting member having a diameter of about 1 mm. Further, by applying an external force in the inner direction to the inner spring member 4 to deform it, the size of the opening indicated by the symbol X changes, and a repulsive force is generated to return to the original shape.

Further, as shown by the dotted line Y in FIG. 3A, the outer diameter of the normal inner spring member 4 is formed to be slightly larger than the inner diameter of the gasket 3. Thereby, when the inner spring member 4 is attached to the inside of the gasket 3, the outer diameter of the inner spring member 4 is reduced, and the repulsive force to return to the original shape contributes to the fixing of the inner spring member 4. Become.

The attachment state when the main body plate 2, the gasket 3 and the inner spring member 4 are integrated will be described with reference to FIG. FIG. 3C is a cross-sectional view of the periphery of the gasket through-hole 5 from the thickness direction of the main body plate 2.

As shown in FIG. 3C, the innermost side is the inner spring member 4, and the gasket 3 and the main body plate 2 are arranged in this order on the outer side.

As described above, in the gasket 3, the metal thin piece that is a constituent member is processed so that the central portion in the width direction becomes the convex portion 12, and accordingly, the opposite side is the concave portion 13. For this reason, when the inner spring member 4 is attached to the inside of the gasket 3, the inner spring member 4 is fitted into the recess 13 and is difficult to come off.

The inner spring member 4 can suppress the inner end of the metal flake of the gasket 3 that has been wound in an idle manner, and can hardly cause the shape change of the same portion caused by the fluid pressure or the like.

Further, the width of the inner spring member 4 is formed to be smaller than the width of the through hole 5 for gasket, and the volume of the inner spring member 4 occupying the fluid path is small. As a result, even if the inner spring member 4 is attached, the change in the flow rate of the fluid is small, and the performance of the panel valve can be hardly affected.

In addition, as described above, the region of the main body plate 2 facing the gasket through-hole 5 has a shape in which the concave portion 14 is formed. For this reason, when the gasket 3 is attached to the gasket through-hole 5, the gasket 3 is fitted into the recess 14 and is difficult to come off.

As described above, the panel valve seal structure of the present invention is excellent in handleability and structural stability, and can sufficiently secure the airtightness of the installation location.
Moreover, the gasket packing of this invention is excellent in handleability and structural stability, and can fully ensure the airtightness of an installation location.

DESCRIPTION OF SYMBOLS 1 Seal structure 2 Main body plate 3 Gasket 4 Inner spring member 5 Gasket through-hole 6 Metal plate 7 Through-hole 8 Protruding piece 9 Welded part 10 Free end 11 Edge position of outer edge side 12 Protrusion 13 Concave 14 Concave

Claims

A plate-like plate body in which at least two through holes are formed;
A gasket packing formed in a substantially donut shape and fixable to the through hole;
A panel valve seal structure comprising: a substantially C-shaped inner member that can be fitted inside the gasket packing and has an outer periphery larger than an inner periphery of the gasket packing.
The panel valve sealing structure according to claim 1, wherein the gasket packing has a spiral shape in which a metal plate having a convex portion formed in the center and a soft filler material are wound in two upper and lower layers.
3. The panel valve seal structure according to claim 1, wherein a first recess into which the inner member can be fitted is formed inside the gasket packing. 4.
The plate body has a second recess into which the gasket packing can be fitted in a region facing the through hole,
The panel valve seal structure according to claim 2, wherein the gasket packing is configured such that an end portion of the metal plate on the outer peripheral side is separated from a metal plate inside the region.
The plate body is composed of two flat plate members,
The panel valve sealing structure according to claim 2, wherein the gasket packing has a convex portion sandwiched and fixed between the plate members.
A panel block having a first joining surface;
A panel valve having a second joint surface facing the first joint surface;
At least two through-holes, and a plate-like plate body disposed between the first joint surface and the second joint surface;
The plate body is provided on the same plane as the plate body, and a protruding piece protruding from between the first joint surface and the second joint surface;
A gasket packing formed in a substantially donut shape and fixable to the through hole;
A panel valve seal structure comprising: a substantially C-shaped inner member that can be fitted inside the gasket packing and has an outer periphery larger than an inner periphery of the gasket packing.
It has a spiral shape in which a metal plate with a convex portion formed in the center and a soft filler material are wound on top and bottom in two layers. Separately configured gasket packing.