JP2000291803A - Production method for metal jacket gasket, press roller device and metal jacket gasket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production method for a metal jacket gasket maintaining good yield, good manufacturability and high efficiency of producing metal jacket gaskets, a press roller device used in the production method and a metal jacket gasket produced by the production method. SOLUTION: A band shaped metal base member 14, a band shaped cushion material 15 and a band shaped metal cover member 16 narrower in width than the base member 14 are prepared. The cushion material 15 is piled up on the base member 14 and the cover member 16 is piled up on those. Both side ends of the base member 14 are folded back to make overlap with the cover material 16 by a press roller 31 or 34 and thereby a band shaped gasket process member 17 is formed. Metal jacket gaskets are produced by processing the gasket process material 17 to a designated shape and connecting its longitudinal ends.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a metal jacket gasket, a pressure roller device and a metal jacket gasket, and more particularly, to a heat exchanger, a pressure vessel, a tower, various kinds of equipment, a valve, a joint flange, and the like. The present invention relates to a method of manufacturing a metal jacket gasket used for manholes and the like, a pressure roller device used in the method, and a metal jacket gasket manufactured by the method.

[0002]

2. Description of the Related Art Conventionally, metal jacket gaskets in which a cushion material such as asbestos or ceramic is coated with metal are mainly used in oil refinery plants and power plants, mainly in heat exchangers, pressure vessels, tower tanks and the like under high temperature and high pressure. Equipment, valves,
It is used to ensure the sealing properties of joint flanges and manholes.

As shown in FIG. 13, such a metal jacket gasket 4 usually has a ring shape, and its cross section is, for example, as shown in FIG.
The cushion member 2 is superimposed on the cover member 3, and the cover member 3 having a smaller width than the base member 1 is further superimposed on the cushion member 2, and both ends of the base member 1 are folded back so as to overlap the cover member 3. It is formed by.

[0004] More specifically, the metal jacket gasket 4 is manufactured as follows. That is, first, the ring-shaped base member 1 and the cover member 3 are punched from a metal flat plate, and the ring-shaped cushion material 2 is punched from a flat plate formed of a predetermined cushion material. The inner peripheral side end and the outer peripheral side end are manually erected using a jig,
After the base member 1 is formed into a U-shaped cross section, the cushion member 2 is put into the opening of the base member 1 and the cover member 3 is overlaid thereon, and then the both sides of the base member 1 formed upright are formed. The end is formed so as to be bent over the cover member 3 in a bent shape. The metal jacket gasket 4 formed in a ring shape is provided with a path 5 having a predetermined shape corresponding to its purpose and application along the radial direction of the metal jacket gasket 4. Is welded to the inner peripheral surface of the metal jacket gasket 4.

[0005]

However, when the metal jacket gasket 4 is manufactured by such a method, there are the following problems. That is, first, when the base member 1, the cushion member 2 and the cover member 3 are formed by punching from a flat plate, respectively, the material remaining after the punching is lost, the yield is low, and the material cost is high. is there.

Further, the inner peripheral side end and the outer peripheral side end of the base member 1 are manually erected by using a jig, and the cushion member 2 and the cover member 3 are stacked and then erected. If both end portions of the member 1 are bent over the cover member 3 in a bent shape, there is a problem that it takes a lot of trouble, lowers work efficiency, and increases manufacturing cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a metal jacket gasket capable of efficiently producing a metal jacket gasket with good yield and good workability. An object of the present invention is to provide a jacket gasket manufacturing method, a pressure roller device used in the manufacturing method, and a metal jacket gasket manufactured by the manufacturing method.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, a first aspect of the present invention provides a belt-shaped metal base member, a band-shaped cushion material, and a band-shaped cushion member narrower than the base member. A metal cover member is prepared, the cushion material is laid on the base member, and the cover member is further laid on the cushion member, and both end portions in the width direction of the base member are placed on the cover member. By folding back so as to overlap with, the cushion material forms a band-shaped gasket processing member sandwiched between the base member and the cover member, and after processing the gasket processing member into a predetermined shape, the gasket It is characterized in that the ends of the processing members are joined.

According to such a configuration, in the metal jacket gasket, a band-shaped base member, a cushion material and a cover member prepared in advance are overlapped, and both side ends in the width direction of the base member are overlapped on the cover member. By folding back as described above, a band-shaped gasket-processed member is formed, processed into a predetermined shape, and then joined at its end to manufacture.

[0010] The invention described in claim 2 is the same as the claim 1.
In the invention described in the above, a plurality of pressure rollers for bending both side ends in the width direction of the base member at a predetermined angle are prepared, and each of the pressure rollers is moved from an upstream side to a downstream side of the pressure roller. The base member is pressurized so that both side edges in the width direction are folded back, the cushion material is superimposed on the base member, and the cover member is further superimposed on the cushion material. By supplying from the upstream side to the downstream side of the pressure roller, both end portions in the width direction of the base member are folded back so as to overlap the cover member.

According to such a configuration, if the base member, the cushion material, and the cover member are continuously supplied from the upstream side to the downstream side of the pressure roller in a state where the base member, the cushion member, and the cover member are overlaid, both ends in the width direction of the base member The part can be continuously folded over the cover member, so that the band-shaped gasket processing member can be continuously formed.

According to a third aspect of the present invention, a band-shaped cushion member is superimposed on a band-shaped metal base member, and a band-shaped metal member narrower than the base member is further formed thereon. A process for forming a gasket processing member used as a processing material of a metal jacket gasket, in which the cushion material is sandwiched between the base member and the cover member, from a band-shaped molding material on which the cover member is overlapped. In a pressure roller device, a plurality of pressure rollers for bending both side ends in the width direction of the base member at a predetermined angle are provided in an aligned state, and each pressure roller is provided for each of the pressure rollers. The base member is formed such that the bending angles at both ends in the width direction of the base member are different from each other, and the molding material is supplied from an upstream side to a downstream side of the pressure roller, thereby forming the base. The both widthwise side end portions of the member, is characterized by being configured to wrap so as to overlap on said cover member.

According to such a configuration, if the belt-shaped molding material in which the base member, the cushion material, and the cover member are superimposed is continuously supplied from the upstream side to the downstream side of the pressure roller, the width of the base member is reduced. The both ends in the direction can be continuously folded back on the cover member, whereby the band-shaped gasket processing member can be continuously formed.

According to a fourth aspect of the present invention, a band-shaped metal base member, a band-shaped cushion material, and a band-shaped metal cover member narrower in width than the base member are used. The cushioning material is overlaid, the cover member is further overlaid thereon, and the widthwise side ends of the base member are folded back so as to overlap the cover member, whereby the cushioning material is formed. A band-shaped gasket processing member sandwiched between the base member and the cover member is formed, and after the gasket processing member is processed into a predetermined shape, the gasket processing member is formed by joining ends thereof. It is characterized by being.

According to such a configuration, the metal jacket gasket is prepared by laminating a band-shaped base member, cushion material and cover member prepared in advance, and both end portions in the width direction of the base member overlap the cover member. As a result, the band-shaped gasket member is formed, processed into a predetermined shape, and then joined at its ends.

[0016]

FIG. 1 is a front view showing one embodiment of a metal jacket gasket of the present invention. In FIG. 1, this metal jacket gasket 11 ensures the sealing properties of heat exchangers, pressure vessels, towers, various devices, valves, joint flanges, manholes, etc. mainly at high temperatures and high pressures such as oil refinery plants and power plants. And a ring-shaped gasket body 12
One path 13 is provided along the radial direction of the gasket main body 12.

As shown in FIG. 2, the gasket body 12 and the path 13 have a base member 14 made of a metal such as stainless steel, a cushion material 15 made of asbestos, ceramic, graphite, felt and the like, and a stainless steel or the like. And a cover member 16 having a width smaller than that of the base member 14. The cushion member 15 is stacked on the base member 14, and the cover member 16 is further stacked on the cushion member 15. In this state, both ends of the base member 14 are formed by being folded back so as to overlap the cover member 16.

Such a metal jacket gasket 1
1 is manufactured as follows. That is, first, the band-shaped base member 14, the band-shaped cushion material 15, and the band-shaped cover member 16 are prepared. For example, the width of the band-shaped base member 14 is 10 mm,
A long one having a length of about 13 mm or 16 mm is used, and one wound in a roll shape or the like is suitably used. Also,
As the band-shaped cushion material 15, a long material having a width wider than the base member 14 and smaller than the cover member 16 is used, and a material wound in a roll shape or the like is preferably used. In addition, such a long cushion material 15 can be obtained by, for example, compression molding the powder cushion material 15. Further, as the belt-shaped cover member 16, an elongated member having a width smaller than that of the base member 14 is used, and a member wound in a roll shape or the like is preferably used.

Then, the cushion member 15 is superimposed on the base member 14 and the cover member 16 is further superimposed thereon, so that both ends in the width direction of the base member 14 are covered with the cover member 1.
By folding back on 6, a band-shaped gasket processing member 17 in which the cushion material 15 is sandwiched between the base member 14 and the cover member 16 is formed.

The gasket member 17 can be formed, for example, by using a forming device 18 shown in FIG. Referring to FIG.
The support unit 19 that supports the base member 14, the cushion material 15, and the cover member 16, which are wound in a roll shape, and the both ends in the width direction of the base member 14 are folded back so as to overlap the cover member 16. And a roller unit 20 as a roller device.

The support unit 19 includes a base frame 22
A large-diameter roll support frame 23 that extends upward from the middle of the length of the base frame 22; a side frame 24 that extends rearward from the middle of the large-diameter roll support frame 23 in the lengthwise direction; A small-diameter roll support frame 25 is provided to extend from the free end of the side frame 24 to intersect vertically.

At the upper part of the large-diameter roll support frame 23, a large-diameter first roll 26 around which the cover member 16 is wound in a roll shape is rotatably supported.
At its lower part, a large-diameter second roll 27 around which the base member 14 is wound in a roll shape is rotatably supported. A small-diameter third roll 28 in which the cushion material 15 is wound in a roll shape is rotatably supported at the upper end of the small-diameter roll support frame 25, and the lower end is similarly provided with a cushion. A small-diameter fourth roll 29 around which the material 15 is wound in a roll shape is rotatably supported.

The first to fourth rolls 26 to 4
From the roll 29, the base member 14, the cushion material 15,
The cover member 16 is pulled out, the cushion member 15 is superimposed on the base member 14, and the cover member 16 is further superimposed on the cushion member 15, and is supplied to the roller unit 20 as a molding material. In addition,
The cushion material 15 pulled out from each of the third roll 28 and the fourth roll 29 is guided toward the roller unit 20 by a guide roller 30 provided on the large-diameter roll support frame 23.

The roller unit 20 is provided on a gantry 51 and includes a plurality of pressure rollers 31 to 34 for bending both ends in the width direction of the base member 14 at a predetermined angle.
They are sequentially provided in an aligned state along the direction in which the molding material is supplied. These pressure rollers 31 to 34 are rotatably supported by holder members 21 opposed to each other with the pressure rollers 31 to 34 interposed therebetween, and are driven by a motor as a drive source (not shown) via a gear train (not shown). The molding material is configured to be rotated in a direction in which the molding material is transported from the upstream side to the downstream side in the supply direction.

More specifically, the pressure roller 31
Are formed of upper rollers 35 to 38 and lower rollers 39 to 42 which are opposed to each other in the vertical direction, and each of the upper rollers 35 to 38 and the lower rollers 39 to 42 is provided in the width direction of the base member 14. It is formed so that the bending angles of both end portions are different. That is, as shown in FIG. 4, the first pressure roller 31 on the most upstream side includes a first upper roller 35 and a first lower roller 39, and in the shape of the portion where they face each other, the The first upper roller 35 includes a pressing portion formed by a flat surface 35a and an inclined surface 35b extending obliquely upward and outward from both ends of the flat surface 35a, and the first lower roller 39 includes: A pressing portion is formed by a flat surface 39a and an inclined surface 39b extending obliquely upward and outward from both ends of the flat surface 39a.

The base member 14 supplied to the roller unit 20 is first pressed between the first upper roller 35 and the first lower roller 39 of the first pressure roller 31. As shown in FIG. 5, the base portion 14a is formed into a shape having a flat base portion 14a and side end portions 14b extending obliquely upward and outward from both ends of the base portion 14a.

The second pressure roller 32 provided on the downstream side adjacent to the first pressure roller 31 has a second upper roller 36 and a second lower roller 40 as shown in FIG. In the shape of the part facing them, the second upper roller 36 has a pressing part formed by a flat surface 36a and a vertical surface 36b extending vertically upward from both ends of the flat surface 36a. The second lower roller 40 includes a pressing portion formed by a flat surface 40a and a vertical surface 40b extending vertically upward from both ends of the flat surface 40a.

Then, the base member 14 formed by the first pressure roller 31 is
Further, between the second upper roller 36 and the second lower roller 40, pressure is further applied, and as shown in FIG. 7, a flat base portion 14a and vertically upward from both ends of the base portion 14a. And a side end 14b extending toward the end.

The third pressure roller 33 provided on the downstream side adjacent to the second pressure roller 32 includes a third upper roller 37 and a third lower roller 41 as shown in FIG. In the shape of the portion facing them, the third upper roller 37 has a pressing portion formed by a flat surface 37a and an inclined surface 37b extending obliquely downward and outward from both ends of the flat surface 36a. The third lower roller 41 has a pressing portion formed by a flat surface 41a and a vertical surface 41b extending vertically upward from both ends of the flat surface 41a.

Then, the base member 14 formed by the second pressure roller 32 is
Further, the pressure is further applied between the third upper roller 37 and the third lower roller 41, and as shown in FIG. 9, a flat base portion 14a and vertically upward from both ends of the base portion 14a. A lower end 14b extending toward the upper end 1b extending diagonally upward and inward from the lower end 14b;
4c.

The fourth pressure roller 34 provided on the downstream side adjacent to the third pressure roller 33 has, as shown in FIG.
A fourth upper roller 38 and a fourth lower roller 42 are provided, and the fourth upper roller 38 has a pressing portion formed by a flat surface 38a in a shape of a portion facing the fourth upper roller 38, The fourth lower roller 42 has a pressing portion formed by a flat surface 42a and a vertical surface 42b extending vertically upward from both ends of the flat surface 42a.

Then, the base member 14 formed by the third pressure roller 33 is then
Further, between the fourth upper roller 38 and the third lower roller 42, a flat base portion 14a as shown in FIG. 11 and a vertically upward direction from both ends of the base portion 14a as shown in FIG. A lower end 14b extending toward the upper end 14c extending inward in the horizontal direction from the lower end 14b;
And a shape having the following.

Therefore, such a roll unit 2
0, the cushion material 15 is overlaid on the base member 14,
Further, if the cover member 16 is further superimposed thereon and continuously supplied, the both end portions in the width direction of the base member 14 can be continuously folded over the cover member 16, whereby the band-shaped gasket can be formed. The processing member 17 can be formed continuously.

Next, the band-shaped gasket processing member 17 thus formed is processed into a ring shape. For processing into a ring shape, a known bending device 47 may be used. Such a bending device 47 includes, for example, three pressure rollers 48 and 49 as shown in FIG.
And 50, and their roller shafts 48a, 49a
And 50a are provided so as to be arranged at the vertices of the triangle, respectively. A band-shaped gasket processing member 17 is inserted between these pressure rollers 48, 49 and 50 to apply pressure to the desired diameter and What is necessary is just to curve in a ring shape until it becomes.

Then, in a state where the both ends in the length direction of the obtained ring-shaped gasket processing member 17 are abutted,
By joining by known joining means such as welding, the ring-shaped gasket main body 12 can be obtained. Note that, for example, this joint is formed by a dotted line 43 in FIG.
However, the finish can be made inconspicuous in appearance by finishing such as polishing.

In order to provide the path 13 shown in FIG.
The band-shaped gasket processing member 17 is cut into a length corresponding to the inner diameter of the gasket main body 12, and is bridged along the radial direction of the gasket main body 12,
Both ends in the length direction of the path 13 may be joined to the inner peripheral surface of the gasket main body 12 by known joining means such as welding. Thereby, the metal jacket gasket 11 as shown in FIG. 1 can be manufactured. This joint is also shown as a dotted line 44 in FIG. 1, for example.
Can be finished inconspicuously.

It should be noted that such a path 13 is a partition for inserting a pipe or the like, and has various shapes depending on the purpose and application in addition to the shape shown in FIG. Also, after processing and / or joining by a known method, the gasket body 12 may be joined to the inner peripheral surface. The path 13 does not have to be provided.

According to the manufacturing method of the metal jacket gasket of the present embodiment, the metal jacket gasket 11 is replaced with the strip-shaped base member 1 prepared in advance.
4. Since it can be manufactured using the cushion material 15 and the cover member 16, there is no loss of material due to punching of a flat plate, and the manufacturing can be performed with high yield.
Therefore, the material cost can be significantly reduced, and the metal jacket gasket 11 can be provided at low cost.

The base member 14, the cushion member 15
And a plurality of pressure rollers 31 to 34 provided in the roller unit 20 in a state where the cover member 16 is superimposed,
Only by continuously supplying the material from the upstream side to the downstream side, the both ends in the width direction of the base member 14 are covered with the cover member 16.
, So that the band-shaped gasket processing member 17 can be continuously formed. Therefore, unlike the related art, after erecting both side ends of the base member 16 by hand using a jig, there is no need to perform the work of crimping the base member 16 in a bent shape, and the working efficiency is greatly improved. be able to. Therefore, the manufacturing cost can be suppressed, and the metal jacket gasket 11 can be provided at lower cost.

Therefore, the metal jacket gasket 11 manufactured as described above is provided at a low cost because the material cost and the manufacturing cost are greatly reduced.
In addition, according to the manufacturing method of the present embodiment, even if the diameter of the metal jacket gasket 11 is considerably large, the joining portion 43 can be formed at only one place. can do.

In this embodiment, the gasket main body 1
Although 2 was processed into a ring shape, in the present invention, for example, it may be processed into various shapes such as an ellipse and a rectangle depending on the purpose and application, and the application to be used is not particularly limited. .

In the present embodiment, the roller unit 2
Although the number of the pressure rollers 31 to 34 of 0 is set to four, the number is not limited. For example, the number of the pressure rollers 31 to 34 may be increased, and the both ends in the width direction of the base member 14 may be bent more frequently. You may do so.

[0043]

As described above, according to the first aspect of the present invention, a metal jacket gasket is manufactured by using a band-shaped base member, cushion material and cover member prepared in advance. Therefore, there is no loss of material due to punching of a flat plate, and the production can be performed with high yield. Therefore, the material cost can be significantly reduced, and the metal jacket gasket can be provided at low cost.

According to the second aspect of the present invention, the base member, the cushion member, and the cover member are stacked, and only the base member is continuously supplied from the upstream side to the downstream side of the pressure roller. Can be continuously folded back on the cover member, thereby continuously forming the band-shaped gasket processing member.
Therefore, unlike the conventional case, after erecting both side ends of the base member manually by using a jig, there is no need for labor such as crimping in a bent shape, thereby greatly improving work efficiency. Can be. Therefore, the manufacturing cost can be reduced, and the metal jacket gasket can be provided at lower cost.

According to the third aspect of the present invention, the belt-shaped molding material in which the base member, the cushion material, and the cover member are overlapped is continuously supplied only from the upstream side to the downstream side of the pressure roller. The widthwise both end portions of the base member can be continuously folded back on the cover member, whereby the band-shaped gasket processing member can be continuously formed. Therefore, unlike the conventional case, after erecting both side ends of the base member manually by using a jig, there is no need for labor such as crimping in a bent shape, thereby greatly improving work efficiency. Can be. Therefore, the manufacturing cost can be reduced, and the metal jacket gasket can be provided at lower cost.

According to the fourth aspect of the present invention, the metal jacket gasket is made of a band-shaped base member, a cushion material and a cover member prepared in advance, instead of a material that generates a loss by punching a flat plate. Because it is manufactured with good yield. Therefore, it is provided at low cost as a metal jacket gasket in which the material cost is greatly reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a metal jacket gasket of the present invention.

FIG. 2 is a cross-sectional view of the metal jacket gasket shown in FIG.

FIG. 3 is a schematic explanatory view showing a molding apparatus for molding a gasket processing member.

FIG. 4 is a front view showing a first pressure roller of the roller unit shown in FIG. 3;

5 is a cross-sectional view illustrating a shape of a base member formed by a first pressure roller illustrated in FIG.

FIG. 6 is a front view showing a second pressure roller of the roller unit shown in FIG. 3;

7 is a cross-sectional view illustrating a shape of a base member formed by a second pressure roller illustrated in FIG.

FIG. 8 is a front view showing a third pressure roller of the roller unit shown in FIG. 3;

9 is a cross-sectional view showing a shape of a base member formed by a third pressure roller shown in FIG.

FIG. 10 is a front view showing a fourth pressure roller of the roller unit shown in FIG. 3;

11 is a cross-sectional view showing a shape of a base member formed by a fourth pressure roller shown in FIG.

FIG. 12 is a schematic explanatory view of a bending device for processing a gasket processing member.

FIG. 13 is a front view showing a conventional metal jacket gasket.

FIG. 14 is a cross-sectional view of the metal jacket gasket shown in FIG.

[Description of Signs] 11 Metal jacket gasket 14 Base member 15 Cushion material 16 Cover member 17 Gasket processing member 20 Roller unit 31 Pressure roller 32 Pressure roller 33 Pressure roller 34 Pressure roller

Claims (4)

[Claims] 1. A band-shaped metal base member, a band-shaped cushion material, and a band-shaped metal cover member having a width smaller than that of the base member are prepared, and the cushion material is placed on the base member. By overlapping, further covering the cover member thereon, by folding back both side ends in the width direction of the base member so as to overlap the cover member, the cushion material is formed by the base member and the cover member. A method for manufacturing a metal jacket gasket, comprising: forming a band-shaped gasket member sandwiched between the members; processing the gasket member into a predetermined shape; and joining ends of the gasket member. 2. A plurality of pressure rollers for bending both end portions in the width direction of the base member at a predetermined angle are prepared, and each of the pressure rollers is moved from upstream to downstream of the pressure roller. It is configured to press so as to fold both end portions in the width direction of the base member. The cushion material is overlapped on the base member, and the cover member is further stacked thereon. 2. The metal jacket according to claim 1, wherein by supplying the roller from the upstream side to the downstream side, both widthwise side ends of the base member are folded back so as to overlap the cover member. 3. Gasket manufacturing method. 3. A band-shaped molding in which a band-shaped cushion material is laid on a band-shaped metal base member, and a band-shaped metal cover member narrower than the base member is further laid thereon. A pressure roller device for molding a gasket processing member used as a processing material of a metal jacket gasket, wherein the cushion material is sandwiched between the base member and the cover member from a material, A plurality of pressure rollers for bending both widthwise side edges of the member at a predetermined angle are provided in an aligned state, and each of the pressure rollers is, for each of the pressure rollers, a widthwise side edge of the base member. The bending angle is formed to be different, and the molding material is supplied from the upstream side to the downstream side of the pressure roller, so that both widthwise side ends of the base member are moved forward. Characterized in that it is configured to wrap so as to overlap on the cover member,
Pressure roller device. 4. A band-shaped metal base member, a band-shaped cushion material, and a band-shaped metal cover member narrower in width than the base member are used, and a cushion material is stacked on the base member. Further, a cover member is superimposed on the cover member, and both end portions in the width direction of the base member are folded back so as to overlap the cover member, so that the cushion member is located between the base member and the cover member. A band-shaped gasket processing member sandwiched between is formed, and after the gasket processing member is processed into a predetermined shape, the gasket processing member is formed by joining ends thereof. Metal jacket.