JPH0573400U - Gas leak prevention device from the gas holder seal - Google Patents

Abstract

(57) [Abstract] [Purpose] The structure is simple and inexpensive, and the gas filled in the sealing device is extracted and returned to the gas storage section by a simple operation, so that the gas can be discharged from the upper part of the sealing device. Prevent leaks. [Configuration] Gas holder main body 1 having a gas storage unit 11
A floating roof 4 which slides vertically in a is provided, and a sealing device 3 having a plurality of sealing members 19 in contact with the inner peripheral surface 1 of the gas holder main body in the vertical direction is provided on a side peripheral portion of the floating roof 4. In the gas holder described above, the gas exhauster 6 is provided on the gas vent pipe 5 whose suction end is communicatively connected between the seal members 19 of the sealing device 3 and whose discharge end is communicatively connected inside the gas holder. There is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for preventing gas leakage from the seal portion of a gas holder.

[0002]

[Prior Art]

 The Clennet type gas holder has a floating roof that moves upward and downward along the inner peripheral surface of the gas holder body, and a seal portion is provided between the floating roof and the inner peripheral surface of the holder body. The structure of the seal portion is proposed in, for example, Japanese Patent Publication No. 53-20681. As shown in FIG. 5, this structure has a pedestal on a side portion on a floating roof 4 that moves up and down along the inner peripheral surface 1 of the holder body 1a as the amount of gas stored in the gas storage unit 11 increases and decreases. In order to prevent the floating roof 4 from tilting, a guide roller 2 that moves up and down in contact with the inner peripheral surface 1 of the holder body is provided in the upper and middle portions of the gantry G, and at the bottom of the gantry G. Further, there is provided a sealing device 3 that seals between the floating roof 4 and the inner peripheral surface 1 by sliding in contact with the inner peripheral surface 1 of the holder body. Moreover, as shown in FIG. 6, the sealing device 3 is provided with a pressing member 22 connected to the gantry G through a connecting member 23, and the pressing member 22 is provided with the cloth-containing rubber sealing material 19 in the holder main body. A plurality of wood pieces 20 that are in contact with the peripheral surface 1 and are arranged at predetermined intervals in the height direction of the holder main body 1a and are inserted between the cloth-containing rubber sealing materials 19 are fixed by bolts 21 between the cloth-containing rubber sealing materials 19. In addition, the structure is provided with an oil / fat supply pipe 24 for supplying oil / grease to the space 18C surrounded by the inner peripheral surface 1 of the holder body, the upper and lower cloth-filled rubber seal materials 19, and the wood piece 20.

[0003]

[Problems to be solved by the device]

 However, as shown in FIG. 4, in the gas holder body 1a, the gas holder columns 13 are built around the gas holder body 1a in the height direction at predetermined intervals, and further, as shown in FIGS. A plurality of holder reinforcing rings 15 formed by winding the gas holder body 1a in a spiral shape are provided in the height direction of the gas holder body 1a. The support column 13 and the holder reinforcing ring 15 are fixed to the gas holder body 1a made of iron by welding or the like. On the other hand, the gas holder main body 1a repeats so-called expansion / contraction, in which when gas is stored therein, the gas is swelled outward due to the internal pressure of the gas holder and returns to the original state when the gas is exhausted. As a result, the vicinity of the gas holder column 13 and the holder reinforcing ring 15 in the gas holder body 1a undergoes large plastic deformation as shown in FIGS. 4 and 6, and longitudinal strain 14 and lateral strain 16 occur. When the strain amounts of the longitudinal strain 14 and the lateral strain 16 are small, the sealing device 3 proposed in the above Japanese Patent Publication No. 53-20681 is sufficiently practical, but as the strain amounts increase, The adhesion of the cloth-filled rubber sealing material 19 to the inner peripheral surface 1 of the gas holder main body becomes poor, or a portion where the rubber sealing material 19 does not adhere to each other is generated, so that the gas in the gas storage portion 11 leaks from the upper portion of the sealing device 3. For this reason, when inspecting and repairing the floating roof 4 inside the gas holder body 1a, the operator should take sufficient safety measures such as a gas mask and then place it on the floating roof 4 inside the gas holder body 1a. If it is necessary to ride the vehicle for inspection and repair, correct the vertical strain 14 and lateral strain 16 of the gas holder body 1a, or replace the gas holder body 1a if the strains 14 and 16 are large. After that, there was a problem that the gas leakage had to be prevented and then repaired, which required a great deal of time and labor and a large amount of cost.

The present invention advantageously solves the above problems, has a simple structure, is inexpensive, and extracts the gas filled in the sealing device into the gas storage unit by a simple operation. The present invention provides a device for preventing gas from leaking to the sealing device by returning it.

[0005]

[Means for Solving the Problems]

 The present invention has been made in order to achieve the above-mentioned object, and its characteristic means is to provide a floating roof 4 which slides vertically in a gas holder main body 1a having a gas storage portion 11, In a gas holder in which a sealing device 3 having a plurality of vertically-sealing sealing members 19 that come into contact with the inner peripheral surface 1 of the gas holder body is disposed on the side peripheral portion of a floating roof 4, the suction end is the sealing member of the sealing device 3 described above. A device for preventing gas leakage from a gas holder seal portion, characterized in that a gas exhauster 6 is provided on a gas vent pipe 5 which is communicatively connected between 19 and an exhaust end is communicatively connected to the gas holder. is there.

[0006]

[Action]

 The operation of the present invention will be described with reference to FIGS. The gas filled in the space 18b between the cloth-filled rubber seal members 19 of the seal device 3 through the vertical strain 14 and the horizontal strain 16 generated in the gas holder body 1a is driven as necessary to drive the gas exhauster 6 to release the gas. The gas leaks from the upper part of the sealing device 3 by preventing the gas from leaking from the upper part of the sealing device 3 by extracting the gas from the seal 5 and returning it to the gas holder storage part 11 from the opening part 7 opened in the floating roof 4.

[0007]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a cross-sectional view of a crenne type gas holder. The oil / oil separator 12 on the floating roof 4, the gas exhauster 6, and the pressure-resistant hose winder 10 are fixedly installed, and the gas is passed through the floating roof 4 to secure the gas. The opening 7 communicating with the storage 11 is opened. Furthermore, the suction end of the gas vent pipe 5 is connected to the space 18b between the rubber-filled rubber seal material 19 of the sealing device 3, and the discharge end of the gas vent pipe 5 is connected to the opening 7 of the floating roof 4, The oil / fat separator 12 and the gas exhauster 6 (Piston type or diaphragm type pump or pneumatic motor type blower) are sequentially provided in the middle of the suction end and the discharge end of the vent pipe 5. A pressure-resistant hose 9 for externally supplying compressed air as a drive source is connected to the gas exhauster 6, and the floating roof 4 is moved up and down by the pressure-resistant hose winder 10. Takes up and rewinds with the. Note that, in the figure, 1 to 3, 11, 14, 16, 23, and 24 are the same as those in FIG. 5 and FIG. 6 described above, so description thereof will be omitted here.

Thus, when the vertical distortion 14 and the lateral distortion 16 occur in the gas holder body 1a, the adhesion of the cloth-filled rubber seal material 19 of the sealing device 3 to the side plate of the gas holder body 1a becomes poor, or there is a portion that does not adhere. Since the gas is generated, the gas in the gas storage unit 11 first fills the space 18a of the sealing device 3, and when the space 18a is filled, the gas flows into the space 18b above the space.

By degassing the gas filled in the space 18b of the sealing device 3 with the gas vent pipe 5, the gas pressure in the space 18b is lowered to prevent the gas from flowing into the space 18c. The gas leakage from the upper part of the sealing device 3 is prevented. For example, when inspecting the inside of the gas holder main body 1a and the floating roof 4 on the floating roof 4, first, compressed air is supplied to the gas exhaust fan 6 through the pressure-resistant hose 9 to drive the gas exhaust fan 6. To start. As a result, the gas filled in the space 18b of the sealing device 3 is extracted from the gas vent pipe 5 and supplied to the oil / fat separator 12. After the oil / fat for sealing contained in the gas is separated by the oil / fat separator 12, the gas is returned from the opening 7 to the gas storage 11 via the gas exhauster 6 by the gas vent pipe 5.

When compressed air is used as a drive source for the gas exhaust fan 6, there is no danger of ignition of the gas due to sparks or the like when the gas exhaust fan 6 starts to drive or is being driven. It is compact and preferable. Further, if the suction force of the gas exhauster 6 is made too strong, the atmosphere is sucked and the oil and fat in the sealing device 3 is sucked. Therefore, the cloth-filled rubber sealing material 19 at the top of the sealing device 3 and the inner circumference of the gas holder body are sucked. The pressure of the compressed air is controlled by detecting the movement of oil and fat between the surfaces 1 and the amount of oil and fat accumulated in the oil and fat separator 12, or the amount of mixed air, or by detecting the pressure of the space 18b. It is preferable to adjust the discharge amount of the gas exhauster 6 because the gas filled in the space 18b of the sealing device 3 can be stably returned to the gas storage unit 11.

Although the oil / fat separator 12 is used in the present embodiment, the oil / fat separator 12 is used when the amount of oil / fat in the gas extracted from the space 18b of the sealing device 3 is small and does not hinder the gas extraction. Need not be installed. Further, in the present embodiment, the gas vent pipe 5 is provided so as to penetrate the space 18b of the sealing device 3, but the present invention is not limited to this, and it may be provided in any of the other space 18a, 18c, 18d. ..

Further, in the present embodiment, when the inside of the gas holder body 1 a and the floating roof 4 are mounted on the floating roof 4 for inspection and repair, the gas exhaust fan 6 is driven and the upper part of the seal device 3 is driven. Although gas leakage from the inside is prevented, the present invention is not limited to this, and for example, a pressure gauge for measuring the pressure in the space 18b is provided, and when the measured pressure value exceeds a predetermined value, the gas exhauster 6 is set to a predetermined value. The gas may be prevented from leaking from the upper part of the sealing device 3 by constantly driving the space 18b to maintain the space 18b at a predetermined pressure or less.

[0013]

[Effect of the device]

 According to the present invention, the gas vent pipe 5 is connected between the upper and lower sealing members 19 of the sealing device 3, the gas filled in the space of the sealing device 3 is extracted by the gas exhauster 6, and the extracted gas is removed. With a simple structure that only returns to the gas storage unit 11, it is possible to prevent gas leakage from the upper part of the seal portion at a low cost and easily. Therefore, during repair, the vertical strain 14 and lateral strain 16 Since there is no need to make corrections or replace the gas holder body 1a, repairs can be completed in a short time, and the labor required for repairs is low, and the cost required for this is also great. It is a thing.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional side view showing an entire gas holder having a gas leakage prevention device according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional side view showing the vicinity of the sealing device and the gas exhaust fan in FIG.

FIG. 3 is a vertical sectional side view showing the vicinity of the sealing device in FIG. 2 in an enlarged manner.

FIG. 4 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 5 is a schematic vertical sectional side view showing the entire conventional gas holder.

FIG. 6 is an enlarged vertical sectional side view showing the vicinity of the sealing device in FIG.

[Explanation of symbols]

 1 Inner peripheral surface of holder body 1a Holder body 2 Guide roller 3 Sealing device 4 Floating roof 5 Gas vent pipe 6 Gas blower 7 Opening 8 Compressed air supply pipe 9 Pressure hose 10 Pressure hose winder 11 Gas storage 12 Oil separation Container 13 Gas holder column 14 Vertical strain 15 Holder reinforcement ring 16 Lateral strain 18a Space portion 18b Space portion 18c Space portion 18d Space portion 19 Seal material 20 Wood piece 21 Bolt 22 Holding member 23 Connecting member 24 Oil supply pipe

Claims (1)

[Scope of utility model registration request] 1. A floating roof 4 which slides vertically in a gas holder body 1a having a gas storage portion 11 is provided, and a plurality of sealing members 19 which come into contact with the inner peripheral surface 1 of the gas holder body are provided in the vertical direction. In the gas holder in which the sealing device 3 is arranged on the side periphery of the floating roof 4, the suction end is communicated with the sealing material 19 of the sealing device 3, and the discharge end is communicated with the gas holder. A gas leakage prevention device from a gas holder seal portion, characterized in that a gas exhauster 6 is provided in the pipe 5.