CN110589262A

CN110589262A - Floating roof device of oil tank

Info

Publication number: CN110589262A
Application number: CN201910887154.XA
Authority: CN
Inventors: 胡晓珍
Original assignee: Zhejiang Ocean University ZJOU
Current assignee: Zhejiang Ocean University ZJOU
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2019-12-20
Anticipated expiration: 2039-09-19
Also published as: CN110589262B

Abstract

The invention provides a floating roof device of an oil tank, and belongs to the technical field of oil storage tanks. It has solved current oil tank anticorrosion structure with high costs, the poor technical problem of effect etc. The oil tank includes a tank body, this floating roof device is including setting up the body at internal portion of jar, go up the floating roof and float the top down, go up the floating roof and float the top peripheral edge down and have respectively with jar flexible utricule one and flexible utricule two that internal wall contacted, the floating roof is equipped with the first pneumatic cylinder that is used for supporting the floating roof down, first pneumatic cylinder passes through pipeline one intercommunication with flexible utricule one, the body is located the floating roof below down and floats on jar internal liquid level, be equipped with the second pneumatic cylinder that is used for supporting the floating roof down on the body, the second pneumatic cylinder passes through pipeline two intercommunication with flexible utricule two, the upside that goes up the floating roof is provided with the third pneumatic cylinder, be provided with the balancing weight on the piston of third pneumatic cylinder, the third pneumatic cylinder passes through pipeline three and flexible. The floating roof device has the advantages of good sealing effect, flexible movement and reliable operation.

Description

Floating roof device of oil tank

Technical Field

The invention belongs to the technical field of oil storage tanks, and relates to a floating roof device of an oil tank.

Background

The oil tank is used for storing crude oil or product oil, and the oil storage tank is usually made of metal materials and can generate chemical reaction with the oil liquid to generate a corrosion phenomenon of the oil tank. In order to prevent the contact between the oil and the air, a floating roof device is usually arranged above the oil in the oil tank, and the floating roof device can descend along with the descending of the oil, so that the aim of preventing the air from entering the tank body and contacting the oil is fulfilled.

Chinese patent (publication No. CN101609060, published thereon: 2009-12-23) discloses an anti-corrosion device for an oil storage tank during a seawater pressure test period, which comprises a potentiostat, wherein a cathode cable led out by the potentiostat is connected on a bottom plate of the oil storage tank, a zero-position cathode wire in a reference signal wire led out by the potentiostat is connected on the bottom plate of the oil storage tank, a signal reference electrode wire in the reference signal wire led out by the potentiostat is connected with a signal reference electrode arranged on a tank body of the oil storage tank, and an anode cable led out by the potentiostat is connected with a mixed metal oxide auxiliary anode arranged in the oil storage tank.

The corrosion prevention device for the oil storage tank in the patent document can effectively prevent the oil storage tank from being corroded during the pressure test of seawater, and can recycle equipment such as a constant potential rectifier, a reference electrode, a mixed metal oxide auxiliary anode and the like. However, the device has a complex structure, high manufacturing cost and a small application range, and is difficult to realize effective isolation of air and oil in the oil tank.

Disclosure of Invention

The invention provides a floating roof device of an oil tank according to the problems in the prior art, and the technical problems to be solved by the invention are as follows: how to promote the sealed effect of floating roof device in the oil tank does not influence its flexibility that reciprocates simultaneously to strengthen its suitability and keep apart the air effect.

The purpose of the invention can be realized by the following technical scheme:

a floating roof device of an oil tank comprises a tank body and is characterized in that the floating roof device comprises a floating body, an upper floating roof and a lower floating roof which are arranged in the tank body, the upper floating roof and the lower floating roof are arranged in parallel at intervals, the peripheral edges of the upper floating roof and the lower floating roof are respectively provided with a first flexible bag body and a second flexible bag body which are contacted with the inner wall of the tank body, the lower floating roof is provided with a first hydraulic cylinder for supporting the upper floating roof, the first hydraulic cylinder is communicated with the first flexible bag body through a first pipeline, the floating body is positioned below the lower floating roof and floats on the liquid level in the tank body, the floating body is provided with a second hydraulic cylinder for supporting the lower floating roof, the second hydraulic cylinder is communicated with the second flexible bag body through a second pipeline, the upper side of the upper floating roof is provided with a third hydraulic cylinder, and a piston of the third hydraulic cylinder is provided with a balancing weight, and the third hydraulic cylinder is communicated with the first flexible bag body through a third pipeline.

The working principle is as follows: the floating body floats on the surface of oil in the oil tank, when the oil in the oil tank descends, the floating body descends along with the oil and drives the second hydraulic cylinder to loosen, the cylinder body of the second hydraulic cylinder moves downwards along with the floating body, the telescopic rod of the second hydraulic cylinder extends, the flexible bag body II guides the liquid in the flexible bag body II into the hydraulic cavity of the second hydraulic cylinder along with the telescopic rod, the flexible bag body II loosens, the lower floating roof descends, and the upper floating roof also descends along with the flexible bag body II in the same; when the oil stops descending, the second hydraulic cylinder compresses the liquid in the second hydraulic cylinder, and the liquid is guided into the second flexible bag body, the second flexible bag body expands, the lower floating roof stops descending, and similarly, the upper floating roof also stops descending. When oil is injected into the oil tank, the balancing weight is lifted by the aid of the traction rope, the third hydraulic cylinder is loosened, the liquid in the flexible bag body is guided into the third hydraulic cylinder by the flexible bag body I, the flexible bag body I is loosened, the upper floating roof rises, and the lower floating roof is lifted in the same way. Through the cooperation of flexible utricule and pneumatic cylinder among this technical scheme, not only make this floating roof device can remove along with the removal of fluid, can be fine moreover with fluid and air isolated, play the effect that prevents the oil tank and be corroded.

In the floating roof device of the oil tank, a fourth hydraulic cylinder is further arranged between the upper floating roof and the lower floating roof, a cylinder body of the fourth hydraulic cylinder is fixedly arranged on the upper side of the lower floating roof, a telescopic rod of the fourth hydraulic cylinder is connected to the lower side of the upper floating roof, and a cylinder body hydraulic cavity of the fourth hydraulic cylinder is communicated with the flexible bag body through a pipeline four. Through the setting of fourth pneumatic cylinder, at last top of floating shift up the in-process, with the cooperation of pipe four and flexible utricule two, make flexible utricule two relax, the convenient top of floating down removes.

The aforesaid floating roof device of oil tank in, the jar body is cylindricly, it is discoid and both sizes are the same with lower floating roof to go up floating roof, flexible utricule one is the ring form with flexible utricule two, the body also is discoid just the diameter of body is less than go up floating roof and the diameter of floating roof down, the vertical setting up of first pneumatic cylinder is in the upside middle part of floating roof down, the vertical setting up of second pneumatic cylinder is in the upside middle part of body, the vertical setting up of third pneumatic cylinder is in the upside middle part of going up floating roof, the coaxial setting of first pneumatic cylinder, second pneumatic cylinder and third pneumatic cylinder, the fourth pneumatic cylinder is located one side of first pneumatic cylinder.

In the floating roof device of the oil tank, in order to further improve the sealing effect, a plurality of other floating roofs can be arranged in the tank body at intervals in an up-down parallel mode, the floating roofs can be located between the upper floating roof and the lower floating roof, the structure of the floating roof is the same as that of the upper floating roof and the lower floating roof, the edge of each floating roof is also provided with a closed flexible bag body in a surrounding mode, two hydraulic cylinders are also supported between the adjacent floating roofs, and each hydraulic cylinder is also communicated with the flexible bag body above or below through a pipeline. The number of the floating roofs can be set according to actual conditions, so that the corrosion prevention effect of the device is optimal.

In the floating roof device of the oil tank, the upper side of the upper floating roof is provided with the inert gas bag, the lower end of the inert gas bag is provided with the gas pipe, one end of the gas pipe is communicated with the inert gas bag, and the other end of the gas pipe penetrates through the upper floating roof and is communicated with a gap between the upper floating roof and the lower floating roof. The inert gas is introduced into the gap between the upper floating roof and the lower floating roof by utilizing the inert gas bag and the gas pipe, so that the position between the upper floating roof and the lower floating roof can be protected from being corroded.

In the floating roof device of the oil tank, an oil discharge pipe is arranged on the outer peripheral surface of the lower end of the tank body, the oil discharge pipe is communicated with the inside and the outside of the tank body, and a control valve is further arranged on the oil discharge pipe. Through the oil discharge pipe, the oil in the oil tank can be conveniently discharged.

Compared with the prior art, the floating roof device of the oil tank has the following advantages

1. In the technical scheme, the floating roof device of the oil tank can move up and down along with the lifting of oil, and the flexible bag body is loosened through the matching of the flexible bag body and the hydraulic cylinder in the lifting process of the floating roof, so that the floating roof can move up and down conveniently; when the floating roof stops moving, the flexible bag body expands, so that the device is fixed and the sealing effect is improved.

2. The floating roof device of oil tank lets in inert gas at last floating roof and between the lower floating roof through setting up inert gas bag and pipe among this technical scheme, effectively prevents that the position between two floating roofs from being corroded, further promotes the effect of isolated fluid and air.

Drawings

Fig. 1 is a schematic view of the installation structure of the floating roof device.

Fig. 2 is an enlarged schematic view at a in fig. 1.

In the figure, 1, a cylinder body; 2. floating the roof upwards; 3. downward floating roof; 4. a first flexible bag body; 5. a second flexible bag body; 6. a first hydraulic cylinder; 7. a first pipeline; 8. a float; 9. a second hydraulic cylinder; 10. a second pipeline; 11. a third hydraulic cylinder; 12. a piston; 13. a balancing weight; 14. a hauling rope; 15. a third pipeline; 16. a fourth hydraulic cylinder; 17. a fourth pipeline; 18. an inert gas bladder; 19. an air tube; 20. a void; 21. an oil discharge pipe.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, the oil tank comprises a tank body 1, the floating roof device comprises an upper floating roof 2 and a lower floating roof 3 which are arranged in the tank body 1 in parallel at intervals, a first flexible bag body 4 and a second flexible bag body 5 are respectively arranged between the edges of the upper floating roof 2 and the lower floating roof 3 and the inner wall of the tank body 1 in a surrounding manner, and the first flexible bag body 4 and the second flexible bag body 5 are both contacted with the inner wall of the tank body 1; a first hydraulic cylinder 6 is supported and arranged between the upper floating roof 3 and the lower floating roof 4, the first hydraulic cylinder 6 is communicated with the flexible bag body I4 through a first pipeline 7, a floating body 8 floating on the liquid level is arranged below the lower floating roof 3, a second hydraulic cylinder 9 is supported and arranged between the lower floating roof 3 and the floating body 8, the second hydraulic cylinder 9 is communicated with the flexible bag body II 5 through a second pipeline 10, a third hydraulic cylinder 11 is arranged in the middle of the upper end of the upper floating roof 3, a counter weight 13 is arranged on a piston 12 of the third hydraulic cylinder 11, a traction rope 14 is connected onto the counter weight 13, and the third hydraulic cylinder 11 is communicated with the flexible bag body I4 through a third pipeline 15; an oil discharge pipe 21 is arranged on the peripheral surface of the lower end of the tank body 1, the oil discharge pipe 21 is communicated with the inside and the outside of the tank body 1, and a control valve is also arranged on the oil discharge pipe 21.

Further, as shown in fig. 2, a fourth hydraulic cylinder 16 is supported between the upper floating roof 2 and the lower floating roof 3, and the fourth hydraulic cylinder 16 is communicated with the second flexible bladder 5 through a fourth pipeline 17; jar body 1 is cylindricly, come up top 2 and lower top of floating 3 be discoid and both sizes the same, flexible utricule 4 and flexible utricule two 5 are the ring form, body 8 also is discoid and body 8's diameter is less than the diameter of top of floating 2 and top of floating 3 down, the upside middle part of top of floating 3 is being set up down to 6 vertical upwards of first pneumatic cylinder, 9 vertical upwards of second pneumatic cylinder sets up the upside middle part at body 8, 11 vertical upwards settings of third pneumatic cylinder are at the upside middle part of top of floating 2, first pneumatic cylinder 6, 9 and 11 coaxial settings of third pneumatic cylinder, fourth pneumatic cylinder 16 is located one side of first pneumatic cylinder 6. An inert gas bag 18 is arranged at the upper end of the upper floating roof 2, an air pipe 19 is arranged at the lower end of the inert gas bag 18, and the air pipe 19 penetrates through the upper floating roof 2 to be communicated with a gap 20 between the upper floating roof 2 and the lower floating roof 3.

Specifically, the oil discharge pipe 21 is opened, the oil in the tank body 1 descends, the floating body 8 drives the second hydraulic cylinder 9 to relax, meanwhile, the second hydraulic cylinder 9 sucks the liquid in the flexible bag body II 5 through the pipeline II 10, the flexible bag body II 5 is relaxed, and the lower floating roof 3 moves downwards; the lower floating roof 3 drives the first hydraulic cylinder 6 to relax, meanwhile, the first hydraulic cylinder 6 sucks liquid in the flexible bag body I4 through the pipeline I7, the flexible bag body I5 is made to relax, and the upper floating roof 2 moves downwards. When the oil does not descend any more, the floating body 8 does not move downwards, the floating body 8 drives the second hydraulic cylinder 9 to tighten, the second hydraulic cylinder 9 guides the liquid in the second hydraulic cylinder into the second flexible bag body 5 through the second pipeline 10, the second flexible bag body 5 expands, and the lower floating roof 3 stops moving downwards; the lower floating roof 3 is static, so that the first hydraulic cylinder 6 is tightened, the first hydraulic cylinder 6 guides the liquid in the first hydraulic cylinder into the flexible bag body I4 through the pipeline I7, the flexible bag body I4 expands, and the upper floating roof 2 stops moving downwards. Lifting the balancing weight 13 by using the hauling rope 14, driving the third hydraulic cylinder 11 to be relaxed by the balancing weight 13, sucking the liquid in the flexible bag body I5 by the third hydraulic cylinder 11 through the pipeline III 15, relaxing the flexible bag body I5, and moving the upper floating roof 2 upwards; the upper floating roof 2 drives the first hydraulic cylinder 6 to relax, the first hydraulic cylinder 6 sucks liquid in the second flexible bag body 5 through the first pipeline 7, the second flexible bag body 5 relaxes, the lower floating roof 3 is lifted, and meanwhile, the floating body 8 is also lifted. The movement of the other floating roofs in the tank body 1 is the same as described above. An inert gas is injected into the gap 20 through the gas pipe 19 by the inert gas bladder 18. The oil and air are well isolated, and the space between adjacent floating roofs is also protected.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although more use is made herein of 1, cylinder; 2. floating the roof upwards; 3. downward floating roof; 4. a first flexible bag body; 5. a second flexible bag body; 6. a first hydraulic cylinder; 7. a first pipeline; 8. a float; 9. a second hydraulic cylinder; 10. a second pipeline; 11. a third hydraulic cylinder; 12. a piston; 13. a balancing weight; 14. a hauling rope; 15. a third pipeline; 16. a fourth hydraulic cylinder; 17. a fourth pipeline; 18. an inert gas bladder; 19. an air tube; 20. a void; 21. oil drain pipe, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. A floating roof device of an oil tank comprises a tank body (1), and is characterized in that the floating roof device comprises a floating body (8), a floating roof (2) and a lower floating roof (3) which are arranged in the tank body (1), the upper floating roof (2) and the lower floating roof (3) are arranged in parallel up and down at intervals, the peripheral edges of the upper floating roof (2) and the lower floating roof (3) are respectively provided with a flexible bag body I (4) and a flexible bag body II (5) which are contacted with the inner wall of the tank body (1), the lower floating roof (4) is provided with a first hydraulic cylinder (6) for supporting the upper floating roof (3), the first hydraulic cylinder (6) is communicated with the flexible bag body I (4) through a pipeline I (7), the floating body (8) is positioned below the lower floating roof (3) and floats on the liquid level in the tank body (1), the floating body (8) is provided with a second hydraulic cylinder (9) for supporting the lower floating roof (3), the second hydraulic cylinder (9) with flexible utricule two (5) are through pipeline two (10) intercommunication, the upside of floating roof (3) is provided with third pneumatic cylinder (11), be provided with balancing weight (13) on piston (12) of third pneumatic cylinder (11), be connected with on balancing weight (13) and stretch to haulage rope (14) of jar body (1) top, third pneumatic cylinder (11) through pipeline three (15) with flexible utricule one (4) looks UNICOM.

2. The floating roof device of the oil tank according to claim 1, characterized in that a fourth hydraulic cylinder (16) is further arranged between the upper floating roof (2) and the lower floating roof (3), a cylinder body of the fourth hydraulic cylinder (16) is fixedly arranged on the upper side of the lower floating roof (3), a telescopic rod of the fourth hydraulic cylinder (16) is connected to the lower side of the upper floating roof (2), and a cylinder body hydraulic cavity of the fourth hydraulic cylinder (16) is communicated with the flexible second bag body (5) through a pipeline four (17).

3. The floating roof device of the oil tank of claim 2, characterized in that the tank body (1) is cylindrical, the upper floating roof (2) and the lower floating roof (3) are disc-shaped and have the same size, the flexible first bag body (4) and the flexible second bag body (5) are ring-shaped, the floating body (8) is disc-shaped, the diameter of the floating body (8) is smaller than that of the upper floating roof (2) and the lower floating roof (3), the first hydraulic cylinder (6) is vertically upwards arranged at the middle of the upper side of the lower floating roof (3), the second hydraulic cylinder (9) is vertically upwards arranged at the middle of the upper side of the floating body (8), the third hydraulic cylinder (11) is vertically upwards arranged at the middle of the upper side of the upper floating roof (2), and the first hydraulic cylinder (6), the second hydraulic cylinder (9) and the third hydraulic cylinder (11) are coaxially arranged, the fourth hydraulic cylinder (16) is located on one side of the first hydraulic cylinder (6).

4. The floating roof device of the oil tank according to the claim 1, 2 or 3, characterized in that the upper floating roof (2) is provided with an inert gas bag (18) at the upper side, the lower end of the inert gas bag (18) is provided with an air pipe (19), one end of the air pipe (19) is communicated with the inert gas bag (18), and the other end of the air pipe (19) passes through the upper floating roof (2) to be communicated with the gap (20) between the upper floating roof (2) and the lower floating roof (3).

5. A floating roof device for an oil tank according to claim 1, 2 or 3, characterized in that an oil drain pipe (21) is arranged on the outer peripheral surface of the lower end of the tank body (1), the oil drain pipe (21) is communicated with the inside and the outside of the tank body (1), and a control valve is arranged on the oil drain pipe (21).