CN209939471U

CN209939471U - Floating disc sealing device with explosion-proof function

Info

Publication number: CN209939471U
Application number: CN201920311090.4U
Authority: CN
Inventors: 何峥
Original assignee: Nanjing Xuande Network Technology Co Ltd
Current assignee: Nanjing Xuande Network Technology Co Ltd
Priority date: 2019-03-12
Filing date: 2019-03-12
Publication date: 2020-01-14
Anticipated expiration: 2029-03-12

Abstract

The utility model provides a floating plate sealing device with an explosion-proof function, which comprises a tank wall, a floating plate, a positioning plate, a primary seal, a secondary seal, a nitrogen pipeline, a first L-shaped sealing pressing plate, a second L-shaped sealing pressing plate and a third L-shaped sealing pressing plate; the positioning plate is connected with the floating disc through an L-shaped sealing pressure plate II and an L-shaped sealing pressure plate III; the primary seal is fixed on the positioning plate through a second L-shaped seal pressing plate; the secondary seal is fixed between the tank wall and the floating disc through a first L-shaped seal pressing plate and a second L-shaped seal pressing plate; the nitrogen pipeline is positioned below the first L-shaped sealing pressing plate. The utility model has the advantages that: the oil gas concentration of the sealing device is reduced, and the occurrence of fire accidents of the storage tank is avoided; meanwhile, the sealing device can effectively reduce oil gas volatilization and reduce pollution to the environment.

Description

Floating disc sealing device with explosion-proof function

Technical Field

The utility model relates to a floating plate sealing device especially relates to a floating plate sealing device with explosion-proof function.

Background

With the rapid development of petrochemical industry in China and the increasing demand of the society on oil products such as gasoline and the like, the construction of large floating roof storage tanks is increased, and the requirement on the sealing quality of the large floating roof storage tanks is higher and higher; the existing 'oil depot design standard' in China requires that a secondary sealing device is adopted for the floating roof oil tank, namely primary and secondary double seals are arranged, an annular closed space is arranged between the primary and secondary seals, and a certain amount of volatile oil gas exists in the space.

The volatile oil gas in the floating disc sealing device mainly comes from an oil film adhered to the exposed oil surface at the lower part of the primary seal and the tank wall between the primary seal and the secondary seal, and in addition, in the operation process of the floating disc, the effective sealing of the sealing device is difficult to maintain due to tank body deformation, aging of sealing device components and the like, so that the oil gas in the sealing device is continuously volatilized, the local oil gas concentration is high, and the oil gas in the sealing device is easily in an explosion limit range; due to the existence of an explosion environment at the sealing device of the floating plate of the storage tank, when an ignition source (such as thunder, static electricity, open fire and the like) appears at the sealing device, explosion can occur to further cause fire.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a reduce sealing device's oil gas concentration, provide a floating plate sealing device with explosion-proof function.

The utility model provides a technical scheme is: a floating disc sealing device with an explosion-proof function comprises a tank wall, a floating disc, a positioning plate, a primary seal, a secondary seal, a nitrogen pipeline, an L-shaped sealing pressing plate I, an L-shaped sealing pressing plate II and an L-shaped sealing pressing plate III; the positioning plate is connected with the floating disc through an L-shaped sealing pressure plate II and an L-shaped sealing pressure plate III; the primary seal is fixed on the positioning plate through a second L-shaped seal pressing plate; the secondary seal is fixed between the tank wall and the floating disc through a first L-shaped seal pressing plate and a second L-shaped seal pressing plate; the nitrogen pipeline is positioned below the first L-shaped sealing pressing plate.

Further, the primary seal comprises a filler and a rubber ring, and the filler is located inside the rubber ring.

Furthermore, the filler is elastic foam plastic, so that the rubber ring is tightly attached to the tank wall, and the oil-gas space between the primary seal and the secondary seal is reduced.

Furthermore, the bottom of the rubber ring is immersed in oil, so that a gas-liquid phase interface is eliminated, and oil volatilization is reduced.

Furthermore, the nitrogen pipeline can fill nitrogen into the oil gas space between the primary seal and the secondary seal, so that the oil gas concentration is reduced.

The utility model has the advantages that: by means of reducing oil-gas space, eliminating gas-liquid phase interface and increasing nitrogen, the oil-gas concentration of the sealing device is reduced, fire accidents of the storage tank are avoided, and safe operation of the large floating roof storage tank is guaranteed; meanwhile, the sealing device can effectively reduce oil gas volatilization and reduce pollution to the environment.

Drawings

FIG. 1 is a schematic structural view of the present invention;

in the figure: 1-tank wall, 2-floating disc, 3-positioning plate, 4-primary sealing, 5-secondary sealing, 6-nitrogen pipeline, 7-L-shaped sealing pressure plate I, 8-L-shaped sealing pressure plate II and 9-L-shaped sealing pressure plate III.

Detailed Description

The technical scheme of the patent is further described in detail by combining the drawings and specific examples.

A floating disc sealing device with an explosion-proof function comprises a tank wall 1, a floating disc 2, a positioning plate 3, a primary seal 4, a secondary seal 5, a nitrogen pipeline 6, an L-shaped seal pressing plate I7, an L-shaped seal pressing plate II 8 and an L-shaped seal pressing plate III 9; the positioning plate 3 is connected with the floating disc 2 through an L-shaped sealing pressure plate II 8 and an L-shaped sealing pressure plate III 9; the primary seal 4 is fixed on the positioning plate 3 through an L-shaped seal pressing plate II 8; the secondary seal 5 is fixed between the tank wall 1 and the floating disc 2 through a first L-shaped seal pressing plate 7 and a second L-shaped seal pressing plate 8; the nitrogen pipeline 6 is positioned below the first L-shaped sealing pressure plate 7.

The utility model discloses in, once sealed 4 including filler and rubber circle, and the filler is located inside the rubber circle.

The utility model discloses in, the filler is elasticity foamed plastic, makes rubber circle and jar wall 1 closely laminate to reduce the oil gas space between primary seal 4 and the secondary seal 5.

The utility model discloses in, during rubber circle bottom immerged fluid, eliminate gas-liquid phase interface, it volatilizees to reduce fluid.

The utility model discloses in, nitrogen gas pipeline 6 can fill nitrogen gas to the oil gas space between primary seal 4 and the secondary seal 5, reduces oil gas concentration.

The utility model discloses application method is: firstly, the primary seal 4 is arranged on the floating disc, the bottom of the rubber ring is positioned in oil, then the nitrogen pipeline 6 is arranged below the L-shaped seal pressing plate I7, and finally the secondary seal 5 is arranged. The sealing device reduces the oil-gas concentration between the primary seal 4 and the secondary seal 5 in a mode of reducing the oil-gas space, eliminating the gas-liquid phase interface and increasing nitrogen, so that the oil-gas concentration is not in the explosion range, and the occurrence of fire accidents of the floating roof storage tank sealing device and even the whole storage tank is avoided.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. A floating disc sealing device with an explosion-proof function comprises a tank wall, a floating disc, a positioning plate, a primary seal, a secondary seal, a nitrogen pipeline, an L-shaped sealing pressing plate I, an L-shaped sealing pressing plate II and an L-shaped sealing pressing plate III; the positioning plate is connected with the floating disc through an L-shaped sealing pressure plate II and an L-shaped sealing pressure plate III; the primary seal is fixed on the positioning plate through a second L-shaped seal pressing plate; the secondary seal is fixed between the tank wall and the floating disc through a first L-shaped seal pressing plate and a second L-shaped seal pressing plate; the nitrogen pipeline is positioned below the first L-shaped sealing pressing plate.

2. The floating plate sealing device with the explosion-proof function as claimed in claim 1, wherein the nitrogen pipeline can fill nitrogen into the oil gas space between the primary seal and the secondary seal to reduce the concentration of oil gas.

3. The anti-explosion floating plate sealing device as claimed in claim 1, wherein the primary seal comprises a filler and a rubber ring, and the filler is located inside the rubber ring.

4. The anti-explosion floating plate sealing device as claimed in claim 3, wherein the filler is elastic foam plastic, so that the rubber ring is tightly attached to the tank wall, and the oil-gas space between the primary seal and the secondary seal is reduced.

5. The floating disc sealing device with the explosion-proof function as claimed in claim 3, wherein the bottom of the rubber ring is immersed in oil, so that a gas-liquid phase interface is eliminated, and volatilization of the oil is reduced.