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CN-121974051-A - Floating disc device for petrochemical storage tank and working method of floating disc device

CN121974051ACN 121974051 ACN121974051 ACN 121974051ACN-121974051-A

Abstract

The invention belongs to the technical field of storage, in particular to a part of a large container, and particularly relates to a floating disc device for a petrochemical storage tank and a working method thereof, wherein the floating disc device comprises the following components: the floating disc is sleeved outside the positioning column in a lifting manner, and the diameter of the floating disc is larger than the radius of the storage tank; the balance weight disc is provided with a through hole with a diameter larger than that of the positioning column at the axis and is positioned above the floating disc; the connecting pieces are vertically fixed on the upper surface of the floating disc, and the upper ends of the connecting pieces are suitable for being inserted into the connecting holes of the bottom wall of the counterweight disc; the driving ring is fixed on the upper surface of the floating disc and sleeved on the outer wall of the positioning column; the auxiliary pieces are circumferentially and uniformly distributed in the annular through holes of the auxiliary pieces and are suitable for radial sliding relative to the counterweight disc; when the liquid level in the storage tank fluctuates, the floating disc is pushed to float upwards, and the driving ring moves upwards to be abutted with the outer wall of the auxiliary piece; the driving ring extrudes the auxiliary parts to move radially inwards, and each auxiliary part is tightly held on the outer wall of the positioning column so as to keep the counterweight plate stationary relative to the positioning column, so that the floating plate is limited to shake.

Inventors

  • LIU XIAOQUN
  • CHEN SHAN
  • ZHOU XINHUA
  • HU DAN
  • MAO GUIBIN
  • LU YECHUAN
  • CHEN JINHUA
  • JIANG JILIN

Assignees

  • 常州宏川石化仓储有限公司

Dates

Publication Date
20260505
Application Date
20260407

Claims (11)

  1. 1. A float device for petrochemical storage tanks, comprising: the positioning column (1) is coaxially arranged in the storage tank, and two ends of the positioning column are respectively fixed on the bottom wall and the top wall of the storage tank; The floating disc (2) floats on the surface of liquid in the storage tank and is sleeved outside the positioning column (1) in a lifting manner; The axis of the counterweight disc (3) is provided with a through hole (31) with the diameter larger than that of the positioning column (1) and is positioned above the floating disc (2); The connecting pieces (4) are vertically fixed on the upper surface of the floating disc (2), and the upper ends of the connecting pieces (4) are movably penetrated into the connecting holes (30) of the bottom wall of the counterweight disc (3); the driving ring (5) is fixed on the upper surface of the floating disc (2) and sleeved on the outer wall of the positioning column (1); The auxiliary pieces (6) are circumferentially and uniformly distributed in the annular through holes (31) of the auxiliary pieces (6) and are suitable for sliding radially relative to the counterweight disc (3); when the liquid level in the storage tank fluctuates, the floating disc (2) is pushed to float upwards, and the driving ring (5) moves upwards to be abutted with the outer wall of the auxiliary piece (6); The driving ring (5) extrudes the auxiliary parts (6) to move radially inwards, and each auxiliary part (6) is tightly held against the outer wall of the positioning column (1) so that the counterweight disc (3) keeps static relative to the positioning column (1) to limit the floating disc (2) to shake.
  2. 2. A floating disc device for petrochemical tanks according to claim 1, characterized in that, The inner wall of the driving ring (5) is provided with a conical surface (50), and the inner diameter of the conical surface (50) is gradually increased from bottom to top.
  3. 3. A floating disc device for petrochemical tanks according to claim 2, characterized in that, The auxiliary element (6) comprises: a clamping piece (61) which is arc-shaped and has an inner diameter matched with the positioning column (1); the positioning strip (62) is vertically fixed on the outer wall of the clamping piece (61) and is arranged in the sliding groove of the counterweight disc (3) in a sliding manner; a guide block (63) fixed to the outer wall of the clamping piece (61) and matched with the conical surface (50); when the driving ring (5) moves upwards, the guide block (63) is abutted with the conical surface (50), and the conical surface (50) pushes the guide block (63) to move radially inwards so that each clamping piece (61) is tightly held on the outer wall of the positioning column (1).
  4. 4. A floating disc device for petrochemical tanks according to claim 3, The outer wall of the guide block (63) is provided with an inclined plane (64), and the included angle between the inclined plane (64) and the axis of the positioning column (1) is 15-25 degrees.
  5. 5. A floating disc device for petrochemical tanks according to claim 1, characterized in that, The connecting piece (4) comprises a connecting column (41) and a compression spring (42) sleeved on the outer wall of the connecting column (41), and the lower end of the compression spring (42) is fixed on the upper surface of the floating disc (2); the outer diameter of the connecting column (41) is smaller than the inner diameter of the connecting hole (30).
  6. 6. A floating disc device for petrochemical tanks according to claim 5, characterized in that, The axial length of the connecting post (41) is greater than the axial length of the drive ring (5).
  7. 7. A floating disc device for petrochemical tanks according to claim 1, characterized in that, The bottom wall of the floating disc (2) is provided with grid plates, and a pontoon (21) is arranged in the interval of the grid plates.
  8. 8. A floating disc device for petrochemical tanks according to claim 1, characterized in that, The diameter ratio of the floating disc (2) to the diameter of the storage tank is 0.7-0.9:1.
  9. 9. A floating disc device for petrochemical tanks according to claim 6, characterized in that, The number of the connecting pieces (4) is four, and the connecting pieces are circumferentially and uniformly distributed on the upper surface of the floating disc (2).
  10. 10. A floating disc device for petrochemical tanks according to claim 2, characterized in that, The ratio of the inner diameter of the driving ring (5) to the diameter of the positioning column (1) is 1.15-1.25:1.
  11. 11. A method of operating a floating disc device according to any one of claims 1-10, characterized in that it comprises: Under the action of self gravity, the balance weight disc (3) pushes the floating disc (2) to move downwards through each connecting piece (4) so that the floating disc (2) and the balance weight disc (3) float on the liquid surface in the storage tank; when the liquid level fluctuates, the floating disc (2) is pushed to float upwards, and the floating disc (2) drives the driving ring (5) to move upwards to be abutted with the outer wall of the auxiliary piece (6); The driving ring (5) extrudes the auxiliary parts (6) to move radially inwards, and each auxiliary part (6) is tightly held against the outer wall of the positioning column (1) so that the counterweight disc (3) keeps static relative to the positioning column (1) to limit the floating disc (2) to shake.

Description

Floating disc device for petrochemical storage tank and working method of floating disc device Technical Field The invention belongs to the technical field of storage, and particularly relates to a part of a large container, in particular to a floating disc device for a petrochemical storage tank and a working method thereof. Background The normal pressure and low pressure storage tank used in petrochemical industry is mainly used for storing inflammable and explosive liquid medium such as crude oil, product oil, chemical solvent, etc. In the actual operation process, the storage tank is exposed to the outdoor environment for a long time, and is influenced by solar radiation, day and night temperature difference and alternating change of ambient temperature, and the phenomena of local temperature rise and uneven temperature field distribution of the tank wall and liquid in the tank are easy to occur. The uneven temperature distribution can directly cause the liquid in the tank to generate thermal expansion difference and natural convection, thereby causing irregular fluctuation, shaking and fluctuation of the liquid level in the storage tank, and particularly in a large vertical storage tank, the fluctuation of the liquid level is more obvious. The continuous fluctuation of the liquid level can bring multiple potential safety hazards, namely, on one hand, the static accumulation in the medium is aggravated by liquid disturbance, the fire hazard and explosion risk are obviously improved, on the other hand, the fluctuation of the irregular liquid level can easily cause liquid level detection distortion, false liquid level and false interlocking are caused, and accidents such as tank discharge and evacuation are caused when the liquid level is serious, meanwhile, the liquid level repeatedly impacts the tank wall and the tank top structure, the fatigue and the sealing failure of welding seams are easily caused, and the medium leakage and VOCs unorganized emission risk is increased. At present, two types of control modes are mainly adopted in the industry aiming at the problem of fluctuation of the liquid level of the storage tank. The temperature control and shaking suppression mode reduces the influence of temperature difference through the means of external heat preservation of a tank body, high-reflection coating, spray cooling and the like, but the method can only weaken the disturbance effect of temperature on the liquid level, can not fundamentally eliminate natural convection and liquid level shaking, and still can generate obvious fluctuation under the working condition of strong sunlight and extreme temperature difference. Secondly, a mechanical shaking-suppressing mode is adopted, and a damping plate, an anti-shaking partition plate, a shaking-suppressing ring and other fixed structures are usually arranged in the tank, so that liquid level shaking is suppressed through physical blocking. However, the fixed damping plate and the anti-shaking partition plate have obvious defects that the structure occupies an effective space in the tank, the utilization rate of the storage tank is reduced, the storage tank is difficult to detach and maintain after being installed, cleaning and overhauling operations in the tank are not facilitated, stress concentration is easy to form at the connecting part of the partition plate and the wall of the tank, deformation and falling easily occur after long-term liquid washing and impact, meanwhile, the fixed structure cannot adapt to liquid level lifting and fluctuation amplitude change, the anti-shaking effect is limited under different working conditions, and the stable, continuous and full liquid level coverage anti-shaking purpose is difficult to realize. Therefore, the existing temperature control means and the fixed mechanical shaking inhibiting structure can not efficiently and stably inhibit the fluctuation of the liquid level in the storage tank caused by uneven temperature on the premise of adapting to the change of the liquid level, not occupying effective storage space and being convenient to maintain. Research and development of a device capable of self-adapting liquid level lifting, flexibly covering liquid level and stably inhibiting shaking has become a technical problem to be solved in the field of safe operation of petrochemical storage tanks. It should be noted that the above information disclosed in this background section is only for understanding the background of the inventive concept and therefore the above description is not to be construed as constituting information of the related art. Disclosure of Invention The embodiment of the disclosure at least provides a floating disc device for a petrochemical storage tank and a working method thereof. In a first aspect, embodiments of the present disclosure provide a float plate apparatus for a petrochemical storage tank, comprising: The positioning column is coaxially arranged in the storage tank, and t