Oil-gas sealing device for floating roof storage tank

Abstract

The utility model discloses a floating roof storage tank oil gas sealing device which comprises a floating roof sleeve arranged on the outer edge of a supporting stand column in a sleeved mode, a pin shaft penetrates through a through hole which is the same as the supporting stand column in size and corresponds to the supporting stand column in position, and the two ends of the pin shaft are sequentially provided with a pin shaft sealing ring and an anti-loose gasket from inside to outside. One side, provided with the threaded section, of the pin shaft is provided with a compression nut outside the anti-loose gasket; the outer edge of the upper portion of the floating roof sleeve is sleeved with a sealing seat, the upper portion of the inner side of the sealing seat is provided with an outwards-sunken step structure, and a packing sealing ring is arranged in a space formed by the inner wall of the step structure, the top of the floating roof sleeve and the outer wall of the supporting stand column. The sealing structure further comprises a pressing cover arranged above the packing sealing ring. And no leakage of oil gas in a normal pressure state is ensured. And a better sealing standard is achieved.

Description

Technical Field

[0001] The utility model relates to the field of petrochemical storage tanks, in particular to an oil and gas sealing device for a floating roof storage tank. Background Art

[0002] Crude oil storage tanks in the petrochemical industry primarily utilize internal floating roof tanks. These tanks feature a floating roof that can move up and down along the tank's inner wall. The roof relies on the buoyancy of the crude oil within the tank to float above the oil. During normal operation, the roof moves up and down accordingly as the crude oil level increases or decreases. The roof is supported by numerous evenly spaced support columns. These columns ensure that when all the crude oil is drained, the roof maintains a two-meter distance from the tank bottom, ensuring proper inspection and maintenance within the tank.

[0003] The support columns are inserted into the floating roof casing and secured with pins. Gaps exist between the support columns and the casing, and between the pins and the casing. Volatile oil and gas (at atmospheric pressure) can leak through these gaps. These leaks can pose safety risks such as fires and explosions, and can also pollute the environment. Summary of the Invention

[0004] In order to overcome the defects of the above-mentioned background technology, the utility model provides an oil and gas sealing device for a floating roof storage tank, which has a better sealing effect.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0006] A floating roof storage tank oil and gas sealing device comprises: a floating roof sleeve sleeved on the outer edge of a supporting column, a pin shaft passing through a through hole of the same size and corresponding position as the supporting column in the floating roof sleeve, a pin shaft sealing ring and an anti-loosening gasket being arranged in sequence from the inside to the outside at both ends of the pin shaft, a compression nut being arranged outside the anti-loosening gasket on the side where the threaded section of the pin shaft is arranged; a sealing seat being sleeved on the upper outer edge of the upper part of the inner side of the sealing seat being provided with a step structure recessed outward, a packing sealing ring being provided in the space formed by the inner wall of the step structure, the top of the floating roof sleeve and the outer wall of the supporting column; and a compression cover being arranged above the packing sealing ring.

[0007] Preferably, one end of the pin shaft having the threaded section is provided with a cotter pin.

[0008] Preferably, the cross section of the compression cover is an inverted L-shape, and one side of the compression cover extends downward into the space formed by the inner wall of the step structure, the top of the floating roof casing and the outer wall of the support column to compress the packing seal ring.

[0009] Preferably, the material of the packing seal ring is oil-resistant rubber.

[0010] The present invention provides the following beneficial effects: The sealing device between the support column and the upper surface of the floating roof casing utilizes an oil-resistant rubber packing seal to seal the upper surface of the floating roof casing and the outer surface of the support column, ensuring that oil and gas at normal pressure cannot leak. The sealing device at the pin connection between the support column and the floating roof casing utilizes two oil-resistant rubber sealing washers installed at each end of the pin to seal the opening of the floating roof casing, ensuring that oil and gas at normal pressure cannot leak, achieving a superior sealing standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall cross-sectional structure of an embodiment of the utility model

[0012] In the figure: 1-support column, 2-floating roof casing, 3-pin seal ring, 4-pin shaft, 5-seal seat, 6-packing seal ring, 7-pressure cover, 8-stud bolt, 9-nut, 10-gasket, 11-pressure nut, 12-thread, 13-cotter pin, 14-anti-loosening gasket. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] A floating roof storage tank oil and gas sealing device comprises: a floating roof casing 2 sleeved on the outer edge of a supporting column 1, a pin shaft 4 passing through a through hole of the same size and corresponding position as the supporting column 1 in the floating roof casing 2, a sealing ring and a compression gasket 10 being arranged in sequence from the inside to the outside at both ends of the pin shaft 4, a compression nut 11 being arranged outside the compression gasket 10 on the side where the pin shaft 4 has 12 sections of thread; a sealing seat 5 being sleeved on the upper outer edge of the upper portion of the inner side of the sealing seat 5 being provided with a step structure concave outward, a packing seal ring 6 being provided in the space formed by the inner wall of the step structure, the top of the floating roof casing 2 and the outer wall of the supporting column 1; and a compression cover 7 being arranged above the packing seal ring 6.

[0015] One end of the pin shaft 4 having a threaded section 12 is provided with a cotter pin 13 .

[0016] The cross section of the compression cover 7 is an inverted L-shape, and one side of the compression cover 7 extends downward into the space formed by the inner wall of the step structure, the top of the floating roof casing 2 and the outer wall of the support column 1 to compress the packing seal 6.

[0017] The material of the packing seal ring 6 is oil-resistant rubber.

[0018] Sealing device for the support column 1 and the upper surface of the floating roof casing 2. Figure 1In the embodiment shown, the sealing seat 5 (i.e., the sealing stuffing box) is fixed on the upper plane of the floating roof casing 2, and the oil-resistant rubber packing seal 6 is installed in the sealing seat 5 (i.e., in the space formed by the inner wall of the step structure, the top of the floating roof casing 2, and the outer wall of the support column 1), maintaining good contact with the upper plane of the floating roof casing 2 and the outer surface of the support column 1. The tightening cover 7 is installed on the upper end of the packing seal 6. The tightening cover 7 is tightened with stud bolts 8, and the lower end of the tightening cover 7 tightens the packing seal 6. The surface of the packing seal 6 is compressed and expanded toward the gap, and the compressed and expanded packing seal 6 seals the upper plane of the floating roof casing 2 and the outer surface of the support column 1. Ensure that oil and gas in a normal pressure state do not leak. Then perform an airtightness detection test to meet the qualified standards. Achieve the dual goals of preventing production safety hazards and environmental governance.

[0019] The connection between the support column 1 and the floating roof casing 2 pin 4 is sealed, such as Figure 1 In the embodiment shown, a pin seal 3 made of oil-resistant rubber is installed on the left end of the pin 4, and the pin 4 passes through the corresponding openings of the floating roof casing 2 and the support column 1 tube. A pin seal 3 made of oil-resistant rubber is installed on the right end of the pin 4, and then an anti-loosening gasket 14 is installed. The clamping nut 11 is installed on the thread 12 at the right end of the pin 4. The clamping nut 11 is rotated to compress the pin seal 3, ensuring that the pin seal 3 made of oil-resistant rubber is tightly fitted to the outer surface of the two openings of the floating roof casing 2 to ensure that oil and gas under normal pressure do not leak. Then, an airtightness test is carried out to meet the qualified standards. An appropriate anti-loosening gasket 14 is installed on the thread 12 at the right end of the pin 4, and an anti-loosening cotter pin 13 is installed on the pin 4 to ensure that the clamping nut 11 does not loosen and that oil and gas do not leak. The dual goals of preventing production safety hazards and environmental governance are achieved.

[0020] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. An oil and gas sealing device for a floating roof storage tank, characterized in that: The invention comprises: a floating roof sleeve (2) sleeved on the outer edge of a supporting column (1); a pin shaft (4) passing through a through hole of the same size and corresponding position as the supporting column (1) in the floating roof sleeve (2); a pin shaft sealing ring (3) and an anti-loosening gasket (14) are sequentially arranged at both ends of the pin shaft (4) from the inside to the outside; a compression nut (11) is arranged outside the anti-loosening gasket (14) on the side of the pin shaft (4) provided with a threaded section; a sealing seat (5) is sleeved on the upper outer edge of the floating roof sleeve (2); an outwardly concave step structure is provided on the inner upper part of the sealing seat (5); a packing seal ring (6) is provided in the space formed by the inner wall of the step structure, the top of the floating roof sleeve (2) and the outer wall of the supporting column (1); and a compression cover (7) is also provided above the packing seal ring (6).

2. The oil and gas sealing device for a floating roof storage tank according to claim 1, characterized in that: One end of the pin shaft (4) provided with a threaded section is provided with a cotter pin (13).

3. The oil and gas sealing device for a floating roof storage tank according to claim 1, characterized in that: The cross-section of the compression cover (7) is an inverted L-shape, and one side of the compression cover (7) extends downward into the space formed by the inner wall of the step structure, the top of the floating roof casing (2) and the outer wall of the supporting column (1) to compress the packing seal ring (6).

4. The oil and gas sealing device for a floating roof storage tank according to claim 1, characterized in that: The material of the packing seal ring (6) is oil-resistant rubber.

Images