A floating roof oil tank split gauge type central drainage system

Abstract

The present invention discloses a floating roof oil tank split gauge type central drainage system, belonging to the field of floating roof drainage of large storage tanks, including: a first rigid pipe, a second rigid pipe, a third rigid pipe and a fourth rigid pipe; wherein the first rigid pipe is communicated with a sump; the first rigid pipe is fixedly connected with the floating roof; the fourth rigid pipe is fixedly connected with the oil tank wall; the first rigid pipe and the second rigid pipe are connected through a first hinge shaft combination mechanism; the third rigid pipe and the fourth rigid pipe are also connected through the first hinge shaft combination mechanism; the second rigid pipe and the third rigid pipe are connected through a second hinge shaft combination mechanism; compared with the prior art, the application connects four rigid pipes through two hinge shaft combination structures, which can be applicable to the folding conditions of different angles of upper and lower steel pipes, has good adaptability, and can effectively improve the ability of the system to resist circumferential eddy currents.

Description

Technical Field

[0001] The present invention relates to the field of floating roof drainage for large storage tanks, and particularly to a compass-type central drainage system for floating roof oil tanks. Background Art

[0002] For external floating roof storage tanks, since the floating roof is open, rain and snow directly fall on the upper surface of the floating roof. If not drained in time, it will cause serious safety accidents to the floating roof. Therefore, a floating roof drainage system is required to quickly drain water out of the tank in rainy and snowy weather. The existing central drainage systems include a rigid drainage system and a fully flexible drainage system. The rigid drainage systems include: rotary joints, pivot-type, and compass-type drainage devices. The fully flexible drainage system includes: fully flexible drainage hoses. The rigid drainage system is easily affected by lateral forces and the drainage system is easily damaged. The fully flexible drainage system requires space support. The rotary joint type has a poor sealing effect due to dynamic sealing. The pivot type is easily collapsed and damaged due to the large curvature of the flexible pipe part. The fully flexible hose has poor stability of the movement trajectory. Currently, the commonly used compass-type drainage system is difficult to resist the impact of liquid swirl due to its structural settings, and is easily damaged to itself, the connected floating roof part, and the connecting tank bottom plate base. The hose currently used in the compass-type drainage device is a composite bellows, and the composite bellows has a small load due to its structure and is easily damaged. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a compass-type central drainage system for floating roof oil tanks. Four rigid pipes are connected by two hinge shaft combination structures, which can be applicable to the folding conditions of different angles of the upper and lower steel pipes, with good adaptability, and can effectively improve the ability of the system to resist circumferential eddy currents.

[0004] The object of the present invention can be achieved by the following technical solutions:

[0005] A compass-type central drainage system for floating roof oil tanks, comprising: a first rigid pipe, a second rigid pipe, a third rigid pipe, and a fourth rigid pipe; wherein the first rigid pipe is communicated with a sump; the first rigid pipe is fixedly connected to the floating roof; the fourth rigid pipe is fixedly connected to the oil tank wall; the first rigid pipe and the second rigid pipe are connected by a first hinge shaft combination mechanism; the third rigid pipe and the fourth rigid pipe are also connected by the first hinge shaft combination mechanism; the second rigid pipe and the third rigid pipe are connected by a second hinge shaft combination mechanism;

[0006] Wherein the first hinge shaft combination mechanism includes a fifth rigid tube, a sixth rigid tube, a first flexible tube, and a first rotating shaft; both ends of the first flexible tube are each communicated with a sixth rigid tube; each sixth rigid tube is fixedly installed with a fifth rigid tube; the two fifth rigid tubes are rotationally connected through a first rotating shaft; the first rigid tube, the second rigid tube, the third rigid tube, and the fourth rigid tube are connected to the fifth rigid tube;

[0007] Wherein the second hinge shaft combination mechanism includes a seventh rigid tube, an eighth rigid tube, a second flexible tube, a balance rod, and a second rotating shaft; both ends of the eighth rigid tube are each installed with a second flexible tube; each second flexible tube is respectively connected with a seventh rigid tube; the seventh rigid tubes are respectively rotationally connected with the balance rod through a second rotating shaft; the balance rod is fixedly connected with the eighth rigid tube; the second rigid tube and the third rigid tube are connected to the seventh rigid tube.

[0008] In some embodiments, the sixth rigid tube includes a first bent tube and a first straight tube; the first bent tube is fixedly connected with the fifth rigid tube; a first flow guide plate is installed inside the fifth rigid tube at the connection with the first bent tube;

[0009] The seventh rigid tube includes a second bent tube, a second straight tube, and a third straight tube; the second straight tube and the third straight tube are connected through the second bent tube; a second flow guide plate is installed inside the second straight tube at the connection with the second bent tube; the second straight tube is rotationally connected with the balance rod through the second rotating shaft.

[0010] In some embodiments, each fifth rigid tube is fixedly installed with a first blind plate; each first blind plate is fixedly installed with two first side plates; each first side plate is provided with a first through hole; the first rotating shaft is arranged in the first through hole; each second straight tube is fixedly installed with a second blind plate; each second blind plate is fixedly installed with two second side plates; each second side plate is provided with a second through hole; the second rotating shaft is arranged in the second through hole.

[0011] In some embodiments, there is a gap between the first rotating shaft and the first through hole; there is a gap between the second rotating shaft and the second through hole, and there is a distance between the projections of the two first rotating shafts in the vertical direction; there is a length difference between the second rigid tube and the third rigid tube.

[0012] In some embodiments, the second rigid tube is fixedly installed with a first bracket; the first bracket is rotationally connected with a connecting frame; the side of the connecting frame away from the first bracket is rotationally connected with a second bracket; the second bracket can move linearly along the floating roof.

[0013] In some embodiments, slide rails are fixedly installed on the floating roof; pulleys are connected to the slide rails in a rolling manner; the second bracket is connected to the pulleys.

[0014] In some embodiments, limiting rings are fixedly installed on each of the sixth rigid pipe, the seventh rigid pipe, and the eighth rigid pipe; the first flexible pipe and the second flexible pipe are each compressed by the adjacent limiting rings.

[0015] In some embodiments, the first flexible pipe and the second flexible pipe are rubber composite hoses integrally vulcanized from nitrile rubber, spiral steel wires, and high-strength polyester fibers.

[0016] In some embodiments, copper braided static conductive wires are installed on each of the first rigid pipe, the second rigid pipe, the third rigid pipe, and the fourth rigid pipe.

[0017] Advantages of the present invention:

[0018] In this application, four rigid pipes are connected by two hinge shaft combination structures, which can be applicable to the folding situations of upper and lower steel pipes at different angles, with good adaptability and can effectively improve the ability of this system to resist circumferential eddy currents.

[0019] Both of the two hinge shaft combination structures adopt double side plates and coaxial rotation, with large combination strength and strong anti-deformation ability. The second hinge shaft combination structure adopts a connecting rod combined structure, which can ensure the attitude of the return pipe and is beneficial to drainage.

[0020] The connection ports between the rigid pipes adopt flow guiding partition plates, which can not only reduce the local drainage resistance, increase the drainage volume, but also prevent dirt accumulation and blockage of the rigid pipes.

[0021] The second rigid pipe and the floating roof are connected by a connecting pipe, which can share the stress of the fixed hanger and the I hinge shaft and further resist the circumferential eddy current force.

[0022] The flexible pipe of this application is made by integrally vulcanizing nitrile rubber material, spiral steel wires, and high-strength polyester fibers. This flexible hose has better corrosion resistance and anti-extrusion ability, and solves the problem that the corrugated pipes used in the current rigid drainage devices are easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the drawings.

[0024] Figure 1 is a schematic structural diagram of this application;

[0025] Figure 2 is an enlarged schematic diagram at position C of this application;

[0026] Figure 3 is an enlarged schematic diagram at position D of this application;

[0027] Figure 4Schematic diagram of the first hinge shaft combination mechanism of the present application;

[0028] Figure 5 Schematic diagram of the structure in the A direction of the present application;

[0029] Figure 6 Schematic diagram of the connection between the fifth rigid pipe and the sixth rigid pipe of the present application;

[0030] Figure 7 Schematic diagram of the second hinge shaft combination mechanism of the present application;

[0031] Figure 8 Schematic diagram of the structure in the B direction of the present application;

[0032] Figure 9 Schematic diagram of the structure of the eighth rigid pipe of the present application;

[0033] Figure 10 Schematic diagram of the structure of the seventh rigid pipe of the present application;

[0034] Figure 11 Stereoscopic schematic diagram of the second hinge shaft combination mechanism of the present application. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0037] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] A split-rule central drainage system for a floating roof oil tank, comprising: a first rigid pipe 2, a second rigid pipe 3, a third rigid pipe 4 and a fourth rigid pipe 5; wherein the first rigid pipe 2 is communicated with a sump 6; the first rigid pipe 2 is fixedly connected to the floating roof 1; the fourth rigid pipe 5 is fixedly connected to the oil tank wall; the first rigid pipe 2 and the second rigid pipe 3 are connected by a first hinge assembly 7; the third rigid pipe 4 and the fourth rigid pipe 5 are also connected by the first hinge assembly 7; the second rigid pipe 3 and the third rigid pipe 4 are connected by a second hinge assembly 8; therefore, the first rigid pipe 2 will move up and down following the floating roof 1, and drive the second rigid pipe 3 and the third rigid pipe 4 to swing through two hinge assemblies. The first rigid pipe 2 discharges the collected water in the sump 6 into the fourth rigid pipe 5 through the first hinge assembly 7, the second rigid pipe 3, the second hinge assembly 8, the third rigid pipe 4 and the first hinge assembly 7 in sequence; the fourth rigid pipe 5 serves as a drain pipe for discharging the collected water;

[0039] Wherein the first hinge assembly 7 includes a fifth rigid pipe 9, a sixth rigid pipe 10, a first flexible pipe 11 and a first rotating shaft 12; both ends of the first flexible pipe 11 are communicated with a sixth rigid pipe 10; a fifth rigid pipe 9 is fixedly installed on each of the sixth rigid pipes 10; the two fifth rigid pipes 9 are rotatably connected by the first rotating shaft 12; the first rigid pipe 2, the second rigid pipe 3, the third rigid pipe 4 and the fourth rigid pipe 5 are connected to the fifth rigid pipe 9;

[0040] Taking the first rigid pipe 2 and the second rigid pipe 3 as an example; the first rigid pipe 2 and the second rigid pipe 3 are respectively connected to the fifth rigid pipe 9 of the first hinge assembly 7; when the floating roof 1 moves, when the first rigid pipe 2 follows the movement, the first rigid pipe 2 drives the fifth rigid pipe 9 to move, the second rigid pipe 3 follows the movement, and at the same time, the fifth rigid pipe 9 connected to the second rigid pipe 3 rotates around the first rotating shaft 12, and the angles of the two fifth rigid pipes 9 change, which will cause the angles of the sixth rigid pipes 10 to change, thereby changing the state of the first flexible pipe 11; in this way, the load driven by the second rigid pipe 3 will be borne by the fifth rigid pipe 9, the sixth rigid pipe 10 and the first rotating shaft 12, and the first flexible pipe 11 is only responsible for passing water and the water load flowing through the pipe; reducing the damage probability of the first flexible pipe 11;

[0041] Wherein the second hinge assembly 8 includes a seventh rigid pipe 13, an eighth rigid pipe 14, a second flexible pipe 15, a balance rod 16 and a second rotating shaft 20; a second flexible pipe 15 is installed at both ends of the eighth rigid pipe 14; the second flexible pipes 15 are respectively connected to a seventh rigid pipe 13; the seventh rigid pipes 13 are respectively rotatably connected to the balance rod 16 through a second rotating shaft 20; the balance rod 16 is fixedly connected to the eighth rigid pipe 14; the second rigid pipe 3 and the third rigid pipe 4 are connected to the seventh rigid pipe 13;

[0042] When the second rigid pipe 3 is driven by the first rigid pipe 2 to move, the second rigid pipe 3 drives the seventh rigid pipe 13 to move. The seventh rigid pipe 13 drives the eighth rigid pipe 14 to move through the balance rod 16 and the second rotating shaft 20, thereby driving another seventh rigid pipe 13 and the third rigid pipe 4 to move; the two seventh rigid pipes 13 will rotate around the second rotating shaft 20, thereby changing the states of the two second flexible pipes 15; the upper load is borne by the seventh rigid pipe 13, the eighth rigid pipe 14, the balance rod 16 and the second rotating shaft 20, and the second flexible pipe 15 is only responsible for passing water and the water load flowing through the pipe; the probability of damage to the second flexible pipe 15 is reduced.

[0043] In this application, a rigid pipe refers to a pipe that mainly relies on the strength of the pipe body material to support external forces. Under the action of external loads, its deformation is very small, and the failure of the pipe is controlled by the wall strength, such as a metal pipe.

[0044] A flexible pipe is a pipe with significant deformation under the action of external loads. Most of the vertical loads are balanced by the elastic resistance generated by the soil on both sides of the pipe. The failure of the pipe is usually caused by deformation rather than wall damage, such as a rubber hose.

[0045] In some embodiments, the sixth rigid pipe 10 includes a first elbow 21 and a first straight pipe 22; the first elbow 21 is fixedly connected to the fifth rigid pipe 9; a first flow guide plate 23 is installed inside the fifth rigid pipe 9 at the connection with the first elbow 21; the function of the first flow guide plate 23 is to directly guide the water flow into the first elbow 21 of the sixth rigid pipe 10; avoid water accumulation in the part of the fifth rigid pipe 9 from the first rotating shaft 12 to the first elbow 21, reduce the local drainage resistance and prevent dirt accumulation from blocking the drain pipe, which is beneficial to the drainage of the floating roof 1;

[0046] The seventh rigid pipe 13 includes a second elbow 24, a second straight pipe 25 and a third straight pipe 26; the second straight pipe 25 and the third straight pipe 26 are connected by the second elbow 24; a second flow guide plate 27 is installed inside the second straight pipe 25 at the connection with the second elbow 24; the second straight pipe 25 is rotatably connected to the balance rod 16 through the second rotating shaft 20. The function of the second flow guide plate 27 is also to avoid water accumulation in the seventh rigid pipe 13 near the second rotating shaft 20 in the second straight pipe 25, reduce the local drainage resistance and prevent dirt accumulation from blocking the drain pipe, which is beneficial to the drainage of the floating roof 1.

[0047] In some embodiments, a first blind plate 28 is fixedly installed on each of the fifth rigid pipes 9; two first side plates 29 are fixedly installed on each of the first blind plates 28; a first through hole 30 is provided on each of the first side plates 29; the first rotating shaft 12 is arranged in the first through hole 30; a second blind plate 31 is fixedly installed on each of the second straight pipes 25; two second side plates 32 are fixedly installed on each of the second blind plates 31; a second through hole 33 is provided on each of the second side plates 32; the second rotating shaft 20 is arranged in the second through hole 33; both hinge shaft combination structures adopt double side plates, with high combined strength and strong anti-deformation ability.

[0048] In some embodiments, there is a gap between the first rotating shaft 12 and the first through hole 30; there is a gap between the second rotating shaft 20 and the second through hole 33; the gap between the rotating shaft and the through hole facilitates the lateral movement of the rotating shaft inside the through hole; the projections of the two first rotating shafts 12 in the vertical direction have a distance; there is a length difference between the second rigid pipe 3 and the third rigid pipe 4; since the storage tank is cylindrical, the force of circular motion is the circumferential eddy current force; when the storage tank is filling and discharging the medium, it only enters and exits from a specific position on the tank wall. Because the storage tank is cylindrical, a circumferential eddy current will be generated when filling and discharging the medium; there is a stirrer in the storage tank, which will be started at a specific height. When it is started, it will stir the medium in the storage tank, and at this time, a circumferential eddy current force will also be generated; through the above methods, the ability of the system to resist the circumferential eddy current force can be effectively improved.

[0049] In some embodiments, a first bracket 34 is fixedly installed on the second rigid pipe 3; the first bracket 34 is rotatably connected to a connecting frame 35; the side of the connecting frame 35 away from the first bracket 34 is rotatably connected to a second bracket 36; the second bracket 36 can move linearly along the floating roof 1; the second bracket 36 moves back and forth up and down with the floating disk. The connecting frame 35, the second rigid pipe 3 and the floating roof 1 form a triangular structure, which can share the stress at the connection between the floating disk and the first rigid pipe 2 and the first hinge shaft combination structure; prevent the second rigid pipe 3 and the first rigid pipe 2 from falling off, and further improve the ability of the system to resist the circumferential eddy current force;

[0050] The means for the second bracket 36 to move linearly along the floating roof 1 includes, but is not limited to, structures such as guide rails and sliders, slide rails 37 and pulleys 38, electric push rods, and screw sliders.

[0051] In some embodiments, a slide rail 37 is fixedly installed on the floating roof 1; the slide rail 37 is in rolling connection with a pulley 38; the second bracket 36 is connected to the pulley 38; in a common way, the slide rail 37 can be made of an I-beam. A pulley 38 is installed inside each of the I-beams of the second bracket 36. The two pulleys 38 clamp the middle plate of the I-beam, and the second bracket 36 moves linearly along one end face of the upper and lower end faces of the I-beam through the pulley 38.

[0052] In some embodiments, limiting rings are fixedly installed on the sixth rigid pipe 10, the seventh rigid pipe 13, and the eighth rigid pipe 14; the first flexible pipe 11 and the second flexible pipe 15 are both pressed by adjacent limiting rings; the limiting rings are used to limit the force on the end of the flexible pipe, control the deformation of the flexible pipe, and prevent the flexible pipe from being deformed excessively and breaking; the limiting rings are locking structures such as hoop and clamp.

[0053] In some embodiments, the first flexible pipe 11 and the second flexible pipe 15 are rubber composite hoses integrally vulcanized with nitrile rubber, spiral steel wire, and high-strength polyester fiber; this flexible hose has better corrosion resistance and external force resistance, and solves the problem that the bellows used in the current rigid drainage device is easily damaged.

[0054] In some embodiments, copper braided static conductive wires are installed on the first rigid pipe 2, the second rigid pipe 3, the third rigid pipe 4, and the fourth rigid pipe 5; the copper braided static conductive wires are connected in a cross-over manner to conduct static electricity.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A floating roof oil tank split gauge type central drainage system, characterized in that, Comprising: A first rigid pipe (2), a second rigid pipe (3), a third rigid pipe (4) and a fourth rigid pipe (5); wherein the first rigid pipe (2) communicates with the sump pit (6); the first rigid pipe (2) is fixedly connected to the floating roof (1); the fourth rigid pipe (5) is fixedly connected to the oil tank wall; the first rigid pipe (2) and the second rigid pipe (3) are connected by a first hinge assembly mechanism (7); the third rigid pipe (4) and the fourth rigid pipe (5) are also connected by the first hinge assembly mechanism (7); the second rigid pipe (3) and the third rigid pipe (4) are connected by a second hinge assembly mechanism (8); Wherein the first hinge assembly mechanism (7) includes a fifth rigid pipe (9), a sixth rigid pipe (10), a first flexible pipe (11) and a first rotating shaft (12); both ends of the first flexible pipe (11) communicate with one of the sixth rigid pipes (10); each of the sixth rigid pipes (10) is fixedly installed with a fifth rigid pipe (9); the two fifth rigid pipes (9) are rotatably connected by the first rotating shaft (12); the first rigid pipe (2), the second rigid pipe (3), the third rigid pipe (4) and the fourth rigid pipe (5) are connected to the fifth rigid pipe (9); Wherein the second hinge assembly mechanism (8) includes a seventh rigid pipe (13), an eighth rigid pipe (14), a second flexible pipe (15), a balance rod (16) and a second rotating shaft (20); both ends of the eighth rigid pipe (14) are each installed with a second flexible pipe (15); the second flexible pipes (15) are respectively connected to a seventh rigid pipe (13); the seventh rigid pipes (13) are respectively rotatably connected to the balance rod (16) by a second rotating shaft (20); the balance rod (16) is fixedly connected to the eighth rigid pipe (14); the second rigid pipe (3) and the third rigid pipe (4) are connected to the seventh rigid pipe (13); The sixth rigid pipe (10) includes a first elbow pipe (21) and a first straight pipe (22); the first elbow pipe (21) is fixedly connected to the fifth rigid pipe (9); a first flow guiding plate (23) is installed inside the fifth rigid pipe (9) at the connection with the first elbow pipe (21); The seventh rigid pipe (13) includes a second elbow pipe (24), a second straight pipe (25) and a third straight pipe (26); the second straight pipe (25) and the third straight pipe (26) are connected by the second elbow pipe (24); a second flow guiding plate (27) is installed inside the second straight pipe (25) at the connection with the second elbow pipe (24); the second straight pipe (25) is rotatably connected to the balance rod (16) by the second rotating shaft (20).

2. The central drainage system of the pontoon roof oil tank in the form of a dividing gauge according to claim 1, wherein A first blind plate (28) is fixedly installed on each of the fifth rigid pipes (9); two first side plates (29) are fixedly installed on each of the first blind plates (28); a first through hole (30) is provided on each of the first side plates (29); the first rotating shaft (12) is arranged in the first through hole (30); a second blind plate (31) is fixedly installed on each of the second straight pipes (25); two second side plates (32) are fixedly installed on each of the second blind plates (31); a second through hole (33) is provided on each of the second side plates (32); the second rotating shaft (20) is arranged in the second through hole (33).

3. The central drainage system of the pontoon roof oil tank in the form of a dividers according to claim 2, characterized in that, There is a gap between the first rotating shaft (12) and the first through hole (30); there is a gap between the second rotating shaft (20) and the second through hole (33), and there is a distance between the projections of the two first rotating shafts (12) in the vertical direction; there is a length difference between the second rigid pipe (3) and the third rigid pipe (4).

4. The centripetal drainage system of the pontoon roof oil tank according to claim 1, characterized in that A first bracket (34) is fixedly installed on the second rigid pipe (3); the first bracket (34) is rotatably connected to a connecting frame (35); one side of the connecting frame (35) away from the first bracket (34) is rotatably connected to a second bracket (36); the second bracket (36) can move linearly along the floating roof (1).

5. The centripetal drainage system of the pontoon roof oil tank according to claim 4, characterized in that, A slide rail (37) is fixedly installed on the floating roof (1); a pulley (38) is rollingly connected to the slide rail (37); the second bracket (36) is connected to the pulley (38).

6. The centripetal drainage system of the pontoon roof oil tank according to claim 5, characterized in that, Limit rings are fixedly installed on the sixth rigid pipe (10), the seventh rigid pipe (13) and the eighth rigid pipe (14); the first flexible pipe (11) and the second flexible pipe (15) are pressed by the adjacent limit rings.

7. The centripetal drainage system for floating roof oil tanks according to claim 1, characterized in that The first flexible pipe (11) and the second flexible pipe (15) are rubber composite hoses integrally vulcanized with nitrile rubber, spiral steel wires and high-strength polyester fibers.

8. The centripetal drainage system of the pontoon roof oil tank according to claim 1, characterized in that, Copper braided static conductive wires are installed on the first rigid pipe (2), the second rigid pipe (3), the third rigid pipe (4) and the fourth rigid pipe (5).

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