JP2002130594A - Gasholder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a seal life of uneven segment of an inner face of side wall of a gasholder mainframe and attain equilibrium of seal life between a flat segment and an uneven segment so as to decrease the number of replacement of sealing material. SOLUTION: The gasholder that consists of the gasholder mainframe 2 equipped with the flat segment 8 and the uneven segment 9 along the periphery direction of the inner face of sidewall 4a, a piston swinging along the inner face of sidewall 4a, and a seal means to seal the space between the piston and the inner face of sidewall 4a, is provided with a same diameter of seal roller 10 swinging in conjunction with the piston 3 seesaw movement at the condition that the flat segment 8 is depressed by the seal means, and a different diameter of seal roller 11 having the outer circumferential corresponding the shape of the uneven segment 9 swinging in conjunction with the piston 3 seesaw movement at the condition that the uneven segment 9 is depressed by the seal means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable capacity for storing and distributing fuel gas consumed as energy in facilities such as power plants, heating furnaces and cooking utensils in the fields of the steel industry and the chemical industry. More particularly, the present invention relates to a structure for sealing between an inner surface of a side wall of a gas holder main body and a piston for varying a capacity.

[0002]

2. Description of the Related Art As a conventional seal structure for a gas holder of this kind, for example, a seal structure disclosed in Japanese Utility Model Laid-Open No. 63-1997 is known. The seal structure of this gas holder
Between the inner surface of the side wall of the substantially polygonal cylindrical gas holder main body and the piston which moves up and down along the inner surface of the side wall, the flat portion of the inner surface of the side wall is pressed and the piston vertically rolls in conjunction with the vertical movement of the piston. A seal roller with the same diameter is arranged, and the vertical part slides in conjunction with the vertical movement of the piston while pressing the corners between the flat parts adjacent to each other (usually the standing part of the column: the non-flat part). A plate-shaped sealing material is disposed.

[0003]

However, in the conventional gas holder sealing structure, since a plate-shaped sealing material is used for sealing the corners of the inner surface of the side wall, impurities (dust, gas, etc.) in the gas are formed on the inner surface of the side wall. When dust or the like adheres, the damage due to abrasion is greater in the plate-shaped seal material than in the seal roller of the same diameter, and as a result, there is a large difference in the seal life between the flat portion and the corner portion of the inner surface of the side wall. As a result, there is an inconvenience that the number of replacements of the sealing material increases.

SUMMARY OF THE INVENTION The present invention has been made to solve such inconvenience, and greatly improves the seal life of the non-flat portion on the inner surface of the side wall to balance the seal life with the flat portion. Accordingly, an object of the present invention is to provide a gas holder capable of reducing the number of replacements of the sealing material.

[0005]

In order to achieve the above object, a gas holder according to claim 1 has a gas holder body having a flat portion and a non-flat portion along a circumferential direction on an inner surface of a side wall;
In a gas holder, comprising: a piston that moves up and down along the inner surface of the side wall of the gas holder body; and sealing means that seals between the piston and the inner surface of the side wall, the sealing means presses a flat portion of the inner surface of the side wall. In a state where the same-diameter seal roller rolling in the up-down direction in conjunction with the up-down movement of the piston and an outer peripheral surface having a shape corresponding to the non-flat portion of the inner surface of the side wall are pressed against the non-flat portion. A seal roller having a different diameter that rolls in the vertical direction in conjunction with the vertical movement of the piston.

According to a second aspect of the present invention, in the gas holder according to the first aspect, a plurality of the same-diameter seal rollers are disposed on the flat portion, and the same-diameter seal rollers and the different-diameter seal rollers are staggered with respect to each other. It is characterized by being arranged in a lattice.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is an overall schematic view of a gas holder, FIG. 2 is an explanatory cross-sectional view for explaining a seal structure of a gas holder which is an example of an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line AA of FIG. 4 is a view as seen from the direction of arrow B in FIG.

[0008] As shown in FIG.
A gas holder main body 2 having a polygonal cylindrical shape, a piston 3 which moves up and down along a side wall inner surface 4a of the gas holder main body 2, and sealing means 5 for sealing between an outer peripheral portion of the piston 3 and a side wall inner surface 4a. The space below the piston 3 is defined as a gas chamber 6, and when the piston 3 moves up and down, the capacity of the gas chamber 6 changes. In FIG. 1, reference numeral 25 denotes the piston 3 during maintenance and inspection.
It is a gondola for getting in and out of the top of the building.

Referring to FIG. 2 and FIG. 3, the gas holder main body 2 has a column 7 made of H-shaped steel at the apex of the polygon in plan view.
Is formed so that both flanges 7a of the H-shaped steel face inward and outward, and the side plate 4 is attached by welding or the like between the webs 7b of the columns 7 that are adjacent to each other in the circumferential direction, thereby forming a polygonal cylindrical shape. The inner surface of the side plate 4 is formed as a flat portion 8 of the side wall inner surface 4a, and the inner surface of the column 7, that is, the flange 7a of the column 7 protruding inward from the flat portion 8 is formed as a non-flat portion 9 of the side wall inner surface 4a. I have.

The sealing means 5 includes a flat portion 8 on the inner surface 4a of the side wall.
The same-diameter seal roller 10 that rolls in the vertical direction in conjunction with the vertical movement of the piston 3, and the different-diameter seal that rolls in the vertical direction in conjunction with the vertical movement of the piston 3 on the uneven portion 9 of the inner surface 4 a of the side wall. The roller 11 includes a roller 11 and a pressing unit 12 that rotatably holds the two seal rollers 10 and 11 and presses the seal roller 10 toward the inner surface 4 a of the side wall.

The different diameter seal roller 11 has an outer peripheral surface having a shape corresponding to the non-flat portion 9. In this embodiment, the central portion in the axial direction is a small diameter portion 11a, and both end portions in the axial direction are provided. Is the large diameter portion 11b. The outer peripheral surface of the small-diameter portion 11a rolls up and down on the flange surface of the column 7 and the large-diameter portion 1a.
1b is arranged so that the outer peripheral surface thereof rolls up and down on the inner surface of the side plate 4 so as to sandwich both sides in the width direction of the flange 7a. The outer diameter of the large diameter portion 11b is substantially the same as the outer diameter of the seal roller 10 having the same diameter.

The pressing means 12 has a holding plate 13 disposed on the back side of the seal roller 10 of the same diameter and opposed to the flat portion 8 of the inner surface 4a of the side wall, and the holding plate 13 is provided for each of the plurality of flat portions 8. A gap is provided between the holding plates 13 that are adjacent to each other, and the gap faces the non-flat portion 9. Referring to FIG. 4, a pair of support pieces 14 that rotatably support both ends of seal roller 10 having the same diameter are provided on holding plate 13.
a and 14b are protrudingly provided (eight pairs in the figure), and support pieces 15 for rotatably supporting (cantileverly supporting) only one end of the different-diameter seal roller 11 are provided on both sides of the holding plate 13. There are a total of two locations, one at a time. The support of the different-diameter seal roller 11 is cantilevered because the weight (support load) is reduced by the smaller diameter of the central portion of the different-diameter seal roller 11 in the axial direction.

A pair of supporting pieces 14a and 14b
The two pairs of support pieces 14a and 14b at the center are arranged at substantially equal intervals at two locations in the vertical direction at the center and three locations in the vertical direction on both sides. 14
a, 14b, the first and second pair of support pieces 14a,
14b and the second and third pair of support pieces 14 from above
a and 14b, respectively.

On the other hand, the support pieces 15 are first and second support pieces 14a from the top of each of the outer support pieces 14a of the three support piece pairs 14a and 14b arranged on one side of the holding plate 13.
Of the second and third support pieces 14b from the top of the outer support pieces 14b of the three support piece pairs 14a and 14b arranged on the other side of the holding plate 13 and between the support pieces 14b. It is located between them. Thereby, the support piece pair 14a, 14b
Seal rollers 1 of which both ends are rotatably supported
Each of the different-diameter seal rollers 11 whose only one end is rotatably supported at one end by the support piece 15 and the support piece 15 is arranged in a staggered lattice pattern.

At this time, both axial end surfaces of the same-diameter seal roller 10 at the center of the holding plate 13 are substantially flush with the axial end surfaces of the same-diameter seal roller 10 on both sides in the vertical direction. A small gap is formed between the outer peripheral surface of the same-diameter seal roller 10 and the outer peripheral surface of the same-diameter seal roller 10 on both sides. On the other hand, the different-diameter seal rollers 11 are arranged so as to straddle the gap between the adjacent holding plates 13, and both end surfaces in the axial direction are substantially in the vertical direction with the end surfaces of the same-diameter seal rollers 10 on both sides of the holding plate 13. In addition, a slight gap is formed between the outer peripheral surface of the different diameter seal roller 11 and the outer peripheral surface of the same diameter seal roller 10 on both sides of the holding plate 13. The gap between the same-diameter seal rollers 10 and the same-diameter seal rollers 10 and the different-diameter seal rollers 11
The gap between them functions as a labyrinth gap for preventing leakage of the lubricating oil 22 described later.

Referring to FIG. 2, a push plate 16 is fixed to the back of the holding plate 13, and the push plate 16
The protruding end protruding to the side is connected via a rotation pin 18 to a rotation plate 17 supported on the outer peripheral portion of the piston 3 so as to be horizontally rotatable. A wire 2 is provided between the rotating plate 17 and the counterweight 19 attached to the upper surface of the piston 3.
0 and the wire 20 is connected to the piston 3
Is mounted on a pulley 21 attached to the upper part of the vehicle.
Then, depending on the weight of the counterweight 19, the wire 2
By pulling 0 upward, the rotating plate 17 rotates toward the inner surface 4a of the side wall, and the pushing plate 16 pushes the holding plate 13 and thus each of the seal rollers 10 and 11 with a load corresponding to the weight of the counterweight 19. With the same diameter seal roller 10
Is pressed against the flat portion 8 of the side wall inner surface 4a, and the different diameter seal roller 11 is pressed against the non-flat portion 9 of the side wall inner surface 4a.

The space between the lower part of the piston 3 and the lower part of the holding plate 13 is covered with a flexible canvas 26.
The lubricating oil 22 is stored in the space surrounded by a. This lubricating oil 22 allows each seal roller 10, 1
An oil film is formed between the inner wall 1 and the inner surface 4a of the side wall, whereby the rolling of the seal rollers 10, 11 in the vertical direction along the inner surface 4a of the side wall can be made smooth. The space between the back of each of the seal rollers 10 and 11 and the holding plate 13 is filled with grease so that lubricating oil does not leak from the space.

The lower end of the suspension rod 23 is rotatably pin-connected to the uppermost support piece 14a or 14b, and the upper end of the suspension rod 23 is rotated by a bracket 27 attached to the upper part of the piston 3. It is pin connected as much as possible. The suspension rod 23 has a function of preventing the seal rollers 10 and 11 from being inadvertently displaced when the piston 3 moves up and down. In FIG. 2, reference numeral 24 denotes a guide roller that is attached to the piston 2 and that rolls up and down on the inner surface 4 a of the side wall at a position above the piston 3.

As described above, in this embodiment, the seal of the non-flat portion 9 on the inner surface 4a of the side wall has an outer peripheral surface having a shape corresponding to the non-flat portion 9 and is vertically interlocked with the vertical movement of the piston 3. Since the rolling is performed using the different-diameter seal roller 11, the friction against the non-flat portion 9 is greatly reduced as compared with the conventional case where the non-flat portion 9 is sealed using a plate-shaped sealing material. As a result, it is possible to greatly improve the seal life, and as a result, it is possible to balance the seal life with the seal roller 10 having the same diameter that seals the flat portion 8, thereby reducing the number of replacements of the seal material. be able to.

The seal rollers 10 and 11 are arranged in a staggered pattern to provide a labyrinth clearance between the same-diameter seal rollers 10 and the same-diameter seal roller 10 and the different-diameter seal rollers 11. , It is possible to effectively prevent the leakage of the lubricating oil 22,
The sealing performance can be improved. Further, since a plurality of the same-diameter seal rollers 10 and a plurality of different-diameter seal rollers 11 are provided, it is possible to select and replace only the highly worn seal rollers and to replace each seal roller 1.
0, 11 can be reduced in size, and as a result, the roller replacement operation can be facilitated. Further, since the different-diameter seal roller 11 can be supported by a cantilever, the replacement of the different-diameter seal roller 11 can be achieved. Work can be further facilitated.

Further, the different diameter seal roller 11 and the non-flat portion 9
Is a fitting structure of irregularities, so that it is not necessary to connect the holding plates 13 adjacent to each other.

[0022]

As is apparent from the above description, according to the first aspect of the present invention, the seal life of the non-flat portion on the inner surface of the side wall of the gas holder body is greatly improved, and the seal life is balanced with the flat portion. Therefore, the effect that the number of times of replacement of the sealing material can be reduced can be obtained.

According to a second aspect of the present invention, in addition to the first aspect, the gap between the seal rollers having the same diameter and the gap between the seal rollers having the same diameter and the seal rollers having different diameters function as a labyrinth gap. Therefore, it is possible to effectively prevent the leakage of the lubricating oil, and to obtain an effect that the sealing performance can be improved.

[Brief description of the drawings]

FIG. 1 is an overall schematic view of a gas holder.

FIG. 2 is an explanatory cross-sectional view for explaining a seal structure of a gas holder which is an example of an embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a view seen from the direction of arrow B in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Gas holder 2 ... Gas holder main body 3 ... Piston 4 ... Side plate 4a ... Side wall inner surface 5 ... Sealing means 6 ... Gas chamber 7 ... Post 7a ... Flange 7b ... Web 8 ... Flat part 9 ... Non-flat part 10 ... Same diameter seal roller 11 ... Different diameter seal roller 12 ... Pressing means 13 ... Holding plate 14a, 14b ... Support piece 15 ... Support piece 16 ... Push plate 17 ... Rotating plate 18 ... Rotating pin 19 ... Counter weight 20 ... Wire 21 ... Pulley 22 ... Lubrication Oil 23 ... Hanging rod 24 ... Guide roller 25 ... Gondola 26 ... Canvas

Claims (2)

[Claims] 1. A gas holder body having a flat portion and a non-flat portion along a circumferential direction on an inner surface of a side wall, a piston moving up and down along the inner surface of the side wall of the gas holder body, and a piston and the inner surface of the side wall. A gas holder provided with sealing means for sealing the gap, wherein the sealing means rolls up and down in conjunction with up and down movement of the piston while pressing a flat portion of the inner surface of the side wall, A seal roller having an outer peripheral surface having a shape corresponding to the non-flat portion of the inner surface of the side wall and rolling in the vertical direction in conjunction with the vertical movement of the piston while pressing the non-flat portion. A gas holder characterized by the above. 2. The method according to claim 1, wherein a plurality of the same-diameter seal rollers are arranged on the flat portion, and the same-diameter seal rollers and the different-diameter seal rollers are arranged in a staggered pattern. The gas holder according to claim 1.