Petroleum storage tank floating roof seal

Abstract

The utility model discloses a kind of petroleum storage tank floating disc sealing devices, relate to floating disc technical field, to solve the self plastic shape elastic plate in prior art after long time use, self plastic shape ability will gradually weaken, leading to cause sealing performance to decline, even partial air leakage or liquid seal failure problem appears.The floating disc main body edge is provided with annular support frame, the annular support frame outside is provided with annular capsule type filler, each the connecting seat outside is connected with damping telescopic rod, the telescopic rod middle part of the damping telescopic rod is fixedly connected with fixed ring, the telescopic cylinder of the damping telescopic rod is fixedly connected with fixed circular plate on the side away from telescopic rod, buffer spring is sleeved between the fixed circular plate and fixed ring and on damping telescopic rod, by setting the elastic compensation mechanism of damping telescopic rod and buffer spring, when annular capsule type filler is long-term used, it can automatically provide continuous pressure compensation, significantly prolongs the service life of sealing device.

Description

Technical Field

[0001] This utility model relates to the field of floating roof technology, specifically to a sealing device for a floating roof of an oil storage tank. Background Technology

[0002] A sealed floating roof is an environmentally friendly and energy-saving device used to control the volatility of liquids in storage tanks. It typically consists of buoyancy materials, a sealing structure, and a supporting frame. Its core principle is to float on the liquid surface and rise and fall with the liquid level, reducing the contact area between the liquid and air, thereby inhibiting oil and gas evaporation and reducing losses (up to 90% or more). Structurally, it can be divided into fully wetted (aluminum alloy / stainless steel) and non-wetted (polypropylene composite material) types, also possessing corrosion resistance and antistatic properties. Widely used in vertical storage tanks in the petroleum and chemical industries, it effectively reduces VOC emissions, meets environmental regulations, and improves storage and transportation safety.

[0003] For example, patent announcement number CN110002120B discloses a fully compensated bladder-type high-elasticity sealing device for storage tanks. This sealing device is installed in both inner and outer floating roof tanks and is used to seal the space between the floating roof and the tank wall in both tanks. The sealing device is connected above an outer ring beam connector, which is connected to the side of the floating roof. The sealing device includes a high-elasticity sealing component, a space compression component, a pressure strip, and bolt fasteners. The space compression component includes a bladder-type filler, a bladder-type tape, and a self-shaping elastic plate. This invention achieves a large-area seal through the high-elasticity sealing component, enabling electrostatic conduction between the floating roof and the tank wall. Utilizing the material's inherent memory function, it performs elastic compression and self-repair, achieving a fully compensated seal for the floating roof in the oil storage tank and achieving gas-liquid isolation. Simultaneously, it effectively protects and reduces wear on the sealing membrane, significantly extending the service life of the sealing device.

[0004] The above-mentioned technologies use highly elastic sealing components for large-area sealing, but the self-shaping elastic plate will gradually weaken its self-shaping ability after long-term use, leading to a decline in sealing performance and even local leakage or liquid seal failure. Therefore, the market urgently needs to develop a floating roof sealing device for oil storage tanks to help people solve existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing device for floating roofs of oil storage tanks, in order to solve the problem mentioned in the background art that the existing technology uses high elastic sealing components to achieve large-area sealing, but the self-shaping elastic plate will gradually weaken its self-shaping ability after long-term use, resulting in a decline in sealing performance, or even local leakage or liquid seal failure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a floating roof sealing device for an oil storage tank, comprising a floating roof body, an annular support frame provided on the edge of the floating roof body, an annular bladder-type filler provided on the outer side of the annular support frame, and multiple connecting seats fixedly connected in an evenly spaced annular array on the inner wall of the annular support frame and on the upper end of the floating roof body, a damping telescopic rod connected to the outer side of each connecting seat, a fixing ring fixedly connected to the middle of the telescopic rod of the damping telescopic rod, a fixing circular plate fixedly connected to the side of the telescopic cylinder of the damping telescopic rod away from the telescopic rod, and a buffer spring sleeved between the fixing circular plate and the fixing ring and on the damping telescopic rod.

[0007] Preferably, the annular support frame is fixedly connected to the floating plate body, and the annular bladder-type filler is fixedly connected to the annular support frame.

[0008] Preferably, the inner wall of the annular bladder-type filler is provided with multiple circular slots arranged in an equally spaced annular array. One end of each of the multiple damping telescopic rods passes through the connecting seat and the annular support frame in sequence and is inserted into the multiple circular slots respectively, and each is fixedly connected to a rubber circular plate.

[0009] Preferably, one side of the buffer spring is fixedly connected to the fixed ring, and the other side of the buffer spring is fixedly connected to the fixed circular plate.

[0010] Preferably, the fixed circular plate is connected to the connecting seat by two L-shaped connecting rods, both of which are fixedly connected to the fixed circular plate, and both of which are fixedly connected to the connecting seat by a first bolt.

[0011] Preferably, the upper surface of the annular support frame is provided with a plurality of arc-shaped high-elasticity pressure plates in an annular array, and each of the arc-shaped high-elasticity pressure plates extends to the upper end of the annular bladder-type filler.

[0012] Preferably, each of the arc-shaped high-elasticity pressure plates is fixedly connected to the upper end of the annular support frame by a second bolt.

[0013] Compared with the prior art, the beneficial effects of this utility model are: (1) In this utility model, by setting up an elastic compensation mechanism of damping telescopic rod and buffer spring, it can automatically provide continuous pressure compensation when the annular bladder filler is used for a long time, effectively solving the problem of the sealing performance decline caused by material fatigue of traditional sealing devices, and significantly extending the service life of sealing devices.

[0014] (2) In this utility model, an arc-shaped high-elasticity pressure plate is used to apply uniform pressure to the upper end of the annular bladder filler, which not only enhances the top sealing effect, but also prevents the bladder filler from cracking due to excessive deformation, thus improving the reliability and stability of the seal. It is especially suitable for storage tank environments with large liquid level fluctuations.

[0015] (3) In this utility model, the modular design of the L-shaped connecting rod and the first bolt makes the damping telescopic rod and its auxiliary components quick to disassemble and replace, which facilitates maintenance and repair, reduces the cost of use, and improves the practicality and economy of the device. Attached Figure Description

[0016] Figure 1 This is a front view of a floating roof sealing device for an oil storage tank according to the present invention; Figure 2 This is a side sectional view of the annular bladder-type filler of this utility model; Figure 3 This is a top sectional view of the damping telescopic rod of this utility model; Figure 4 This is a detailed enlarged view of part A of this utility model.

[0017] In the diagram: 1. Floating table body; 101. Annular support frame; 102. Connecting seat; 2. Annular bladder-type filler; 201. Circular slot; 3. Damping telescopic rod; 301. Fixing ring; 302. Rubber circular plate; 303. Fixing circular plate; 304. Buffer spring; 4. L-shaped connecting rod; 401. First bolt; 5. Arc-shaped high-elasticity pressure plate; 501. Second bolt. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figure 1-4This utility model provides an embodiment of a floating roof sealing device for an oil storage tank, comprising a floating roof body 1, an annular support frame 101 provided on the edge of the floating roof body 1, the annular support frame 101 being fixedly connected to the floating roof body 1, an annular bladder-type filler 2 provided on the outer side of the annular support frame 101, the annular bladder-type filler 2 being fixedly connected to the annular support frame 101, and a plurality of connecting seats 102 being fixedly connected in an annular array at equal intervals on the inner wall of the annular support frame 101 and on the upper end of the floating roof body 1, each connecting seat 102 having a damping telescopic rod 3 connected to its outer side, a fixing ring 301 being fixedly connected to the middle of the telescopic rod of the damping telescopic rod 3, a fixing circular plate 303 being fixedly connected to the side of the telescopic cylinder of the damping telescopic rod 3 away from the telescopic rod, and a buffer spring 304 being sleeved between the fixing circular plate 303 and the fixing ring 301 and on the damping telescopic rod 3. Multiple circular slots 201 are arranged in an evenly spaced ring array on the inner wall of the filler 2. One end of the telescopic rods of multiple damping telescopic rods 3 passes through the connecting seat 102 and the annular support frame 101 in sequence and is inserted into the multiple circular slots 201 respectively, and each is fixedly connected to a rubber circular plate 302. One side of the buffer spring 304 is fixedly connected to the fixing ring 301, and the other side of the buffer spring 304 is fixedly connected to the fixing circular plate 303. The floating plate body 1 rises and falls with the liquid level in the storage tank. The annular bladder-type filler 2 maintains elastic contact with the tank wall to form the first seal. When the liquid level in the storage tank oscillates and causes the floating plate body 1 to shift, the annular bladder-type filler 2 is compressed and deformed, pushing the telescopic rods of multiple damping telescopic rods 3 to retract inward. At this time, the buffer spring 304 provides a reverse buffering force through the fixing ring 301, and the rubber circular plate 302 slides in the circular slots 201 to maintain contact, forming a dynamic compensation seal.

[0020] Please see Figure 2 and Figure 4 The upper surface of the annular support frame 101 is provided with a ring array of multiple arc-shaped high-elasticity pressure plates 5. Each arc-shaped high-elasticity pressure plate 5 extends to the upper end of the annular bladder filler 2. Each arc-shaped high-elasticity pressure plate 5 is fixedly connected to the upper end of the annular support frame 101 by a second bolt 501. When the annular bladder filler 2 is deformed by pressure, the arc-shaped high-elasticity pressure plate 5 applies continuous downward pressure to the annular bladder filler 2, which enhances the top sealing effect and suppresses the deformation of the upper end of the annular bladder filler 2, preventing excessive deformation of the upper end of the annular bladder filler 2 from causing cracking.

[0021] Please see Figure 3 The fixed circular plate 303 is connected to the connecting seat 102 by two L-shaped connecting rods 4. Both L-shaped connecting rods 4 are fixedly connected to the fixed circular plate 303. Both L-shaped connecting rods 4 are fixedly connected to the connecting seat 102 by the first bolt 401. By removing the first bolt 401, the damping telescopic rod 3 and its auxiliary components can be separated from the annular support frame 101 for easy maintenance and replacement.

[0022] Working Principle: During operation, the floating roof body 1 floats up and down with the liquid level changes in the storage tank. The annular bladder-type filler 2, under the pre-tightening force of the damping telescopic rod 3, maintains an elastic fit against the tank wall, forming the first dynamic sealing barrier. When the liquid level fluctuates or the floating roof shifts, the annular bladder-type filler 2 deforms under pressure, pushing the telescopic rod of the damping telescopic rod 3 inward. At this time, the buffer spring 304 generates a reverse force through the fixing ring 301, causing the rubber circular plate 302 to slide adaptively within the circular slot 201, achieving real-time compensation of the sealing pressure. Simultaneously, the arc-shaped high-elasticity pressure plate 5 applies continuous downward pressure to the upper end of the annular bladder-type filler 2, enhancing the top sealing performance and limiting excessive deformation. This device, through the synergistic effect of mechanical elastic compensation and multiple sealing structures, effectively solves the failure problem caused by material fatigue in traditional seals, maintaining stable sealing performance over a long period.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A floating roof sealing device for an oil storage tank, comprising a floating roof body (1), characterized in that: The floating disk body (1) is provided with an annular support frame (101) at its edge. An annular bladder-type filler (2) is provided on the outer side of the annular support frame (101). Multiple connecting seats (102) are fixedly connected to the inner wall of the annular support frame (101) and in an equally spaced annular array at the upper end of the floating disk body (1). A damping telescopic rod (3) is connected to the outer side of each connecting seat (102). A fixing ring (301) is fixedly connected to the middle of the telescopic rod of the damping telescopic rod (3). A fixing circular plate (303) is fixedly connected to the side of the telescopic cylinder of the damping telescopic rod (3) away from the telescopic rod. A buffer spring (304) is sleeved between the fixing circular plate (303) and the fixing ring (301) and on the damping telescopic rod (3).

2. The oil storage tank floating roof sealing device according to claim 1, characterized in that: The annular support frame (101) is fixedly connected to the floating body (1), and the annular bladder filler (2) is fixedly connected to the annular support frame (101).

3. The oil storage tank floating roof sealing device according to claim 1, characterized in that: The inner wall of the annular bladder filler (2) is provided with a plurality of circular slots (201) arranged in an equally spaced annular array. One end of the telescopic rods of the plurality of damping telescopic rods (3) passes through the connecting seat (102) and the annular support frame (101) in sequence and is inserted into the interior of the plurality of circular slots (201) respectively, and each is fixedly connected to a rubber circular plate (302).

4. The oil storage tank floating roof sealing device according to claim 1, characterized in that: One side of the buffer spring (304) is fixedly connected to the fixing ring (301), and the other side of the buffer spring (304) is fixedly connected to the fixing circular plate (303).

5. The oil storage tank floating roof sealing device according to claim 1, characterized in that: The fixed circular plate (303) and the connecting seat (102) are connected by two L-shaped connecting rods (4). Both L-shaped connecting rods (4) are fixedly connected to the fixed circular plate (303), and both L-shaped connecting rods (4) and the connecting seat (102) are fixedly connected by a first bolt (401).

6. The oil storage tank floating roof sealing device according to claim 1, characterized in that: The upper surface of the annular support frame (101) is provided with a plurality of arc-shaped high elastic pressure plates (5), each of the arc-shaped high elastic pressure plates (5) extending to the upper end of the annular bladder filler (2).

7. A floating roof sealing device for an oil storage tank according to claim 6, characterized in that: Each of the aforementioned arc-shaped high-elasticity pressure plates (5) is fixedly connected to the upper end of the annular support frame (101) by a second bolt (501).

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