Anti-corrosion ground access

Abstract

The invention discloses an anti-corrosion ground access which comprises an access formed in a cofferdam and a terrace higher than the inner side of the cofferdam, a platform is arranged on the inner side of the access, an inner side vehicle running ramp is arranged at the other end of the platform, the outer side of the access is connected with an outer side vehicle running ramp, and an anti-corrosion trench with an opening in the top is formed in the platform. The top of the anti-corrosion trench is covered with a steel cover plate, one end of the steel cover plate is arranged next to the inner side of the cofferdam and rotationally connected with the top face of the platform, and the steel cover plate is wider than the passageway. The entrance higher than the terrace is arranged, the inner side driving ramp and the outer side driving ramp are arranged on the two sides of the entrance, and the top face of the inner side driving ramp is at most flush with the entrance, so that the gradient of the inner side driving ramp is not too large, the slope is not too long, the inner side driving ramp does not occupy too much area in the terrace, and driving and turning of the forklift are prevented from being affected; the collision between the inner side driving ramp and the groove body foundation is not worried, and the anti-corrosion sloping drainage design of the terrace is facilitated.

Description

Technical Field

[0001] The invention relates to an entrance and exit structure, in particular to an anti-corrosion ground entrance and exit. Background Art

[0002] In the field of industrial construction, many process flows require the participation of alkaline or acidic media. Large industrial tanks store a large amount of liquid slurry with extremely high acid or alkali concentrations. During the production process or when an accident occurs, in order to prevent the corrosive slurry from spreading or seeping into the soil and causing environmental pollution or personal injury, production sites with large tanks are often surrounded by cofferdams with a height of 400mm to 1200mm (to be determined by calculation), and the floor is treated with anti-corrosion, such as red mud sedimentation separation and washing, comprehensive filtration, dissolution projects, evaporation and other projects in alumina plants (see attached for details). Figure 6 ). As can be seen from the figure, these anti-corrosion floors are very large, with a length of hundreds of meters. Process operations require openings on the cofferdams of these floors to allow vehicles or people to enter and exit. Many factory areas are designed with openings at the cofferdams, such as Figure 7 As shown, however, the cofferdam is open, and there are more than one or two openings, which violates the original intention of preventing the outflow of the burst tank liquid and increases the risk and hidden danger of outflow. Some plant areas are also designed with ramp-type entrances and exits, such as Figure 8 As shown, the top surface of the ramp is designed to be the same height as the top surface of the cofferdam, which is convenient for forklifts or bucket trucks to enter. The slope of the ramp should not be too large, which will cause the slope to be lengthened, occupy the area in the floor, affect the driving and turning of forklifts, and sometimes collide with the trough foundation, which is not conducive to the floor anti-corrosion slope drainage design. Summary of the invention

[0003] The object of the present invention is to provide an anti-corrosion ground entrance and exit structure which can not only prevent the outflow of liquid from the burst tank, but also facilitate the entry of vehicles, while the slope of the ramp is not too large, avoiding occupying too much area in the floor.

[0004] The technical solution of the present invention is as follows: an anti-corrosion ground entrance and exit, comprising an entrance and exit opened on a cofferdam, the entrance and exit being higher than the floor inside the cofferdam, a platform being arranged inside the entrance and exit, an inner vehicle ramp being arranged at the other end of the platform, an outer vehicle ramp being connected to the outer side of the entrance and exit, an anti-corrosion trench with an opening at the top being arranged on the platform, a steel cover plate being covered on the top of the anti-corrosion trench, one end of the steel cover plate being arranged close to the inner side of the cofferdam, and the end being rotatably connected to the top surface of the platform, and the width of the steel cover plate being greater than the width of the entrance and exit; The bottom of the anti-corrosion trench is lower than the floor surface, and the bottom of the anti-corrosion trench is connected to the accident pool or sewage tank through a buried pipe; The steel cover plate is set with a slope of 2% from the entrance and exit to the inner vehicle ramp.

[0005] In the aforementioned anti-corrosion ground entrance and exit, sealing strips are provided on the portions of the entrance and exit on both sides of the surface of the steel cover plate.

[0006] In the aforementioned anti-corrosion ground entrance and exit, the portions on both sides of the steel cover plate surface wider than the entrance and exit are all provided with sealing strips.

[0007] In the aforementioned anti-corrosion ground entrance and exit, the parts on both sides of the steel cover plate surface wider than the entrance and exit are of step-type structures; the cofferdams on both sides of the entrance and exit are also of step-type structures.

[0008] In the aforementioned anti-corrosion ground entrance and exit, a steel grate is arranged on the top of the anti-corrosion ditch, and a steel cover plate is covered on the steel grate.

[0009] In the aforementioned anti-corrosion ground entrance and exit, the steel cover plate is rotatably connected to the top surface of the platform via hinges.

[0010] In the aforementioned anti-corrosion ground entrance and exit, the entrance and exit is 250 mm higher than the floor level inside the cofferdam.

[0011] In the aforementioned anti-corrosion ground entrance and exit, the slope of the inner vehicle ramp is 12%.

[0012] Beneficial effects of the invention: Compared with the prior art, the invention has the following advantages: By setting up an entrance and exit higher than the floor, inner and outer vehicle ramps are set on both sides of the entrance and exit. The top surface of the inner vehicle ramp is at most flush with the entrance and exit, so that the slope of the inner vehicle ramp will not be too large, the slope will not be too long, and it will not occupy too much area in the floor, avoiding affecting the driving and turning of forklifts. There is no need to worry about the inner vehicle ramp colliding with the trough foundation, which is conducive to the floor anti-corrosion slope drainage design.

[0013] An entrance and exit higher than the ground is provided, and inner and outer vehicle ramps are provided on both sides of the entrance and exit, and a rotatable steel cover is also provided. Since an inner vehicle ramp is also provided on the inside, the inner vehicle ramp itself can prevent the bursting tank liquid from directly flowing out. At the same time, when an accidental bursting tank occurs, the steel cover is erected and combined with the cofferdam to form a complete enclosure structure, thereby further preventing the bursting tank liquid from flowing out.

[0014] By setting up an anti-corrosion ditch, when the height of the bursting slurry exceeds the platform height, the bursting slurry flows into the anti-corrosion ditch through the steel grate and then into the accident pool or sewage tank, so as to control the recovery and reuse of the corrosive slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2This is a structural diagram of the steel cover plate and the cofferdam when they are fitted together; Figure 3 It is a schematic diagram of the structure when the steel cover plate of the present invention is covered; Figure 4 This is a schematic diagram of the structure of the steel cover plate of the present invention when it is half opened; Figure 5 This is a schematic diagram of the structure of the steel cover plate of the present invention when it is fully opened; Figure 6 This is a schematic diagram of the project structure with cofferdam; Figure 7 This is a schematic diagram of the conventional slope grading method (I); Figure 8 This is a schematic diagram of the conventional ramp sloping method (II).

[0016] Figure numerals: 1-cofferdam, 2-entrance and exit, 3-platform, 4-inner vehicle ramp, 5-outer vehicle ramp, 6-anti-corrosion ditch, 7-steel cover plate, 8-sealing strip, 9-steel grate, 10-buried pipe. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0018] An embodiment of the present invention: An anti-corrosion ground entrance and exit, comprising an entrance and exit 2 opened on a cofferdam 1, the bottom of the entrance and exit 2 is higher than the floor inside the cofferdam 1, a platform 3 is arranged on the inside of the entrance and exit 2, an inner vehicle ramp 4 is arranged at the other end of the platform 3, an outer vehicle ramp 5 is connected to the outer side of the entrance and exit 2, an anti-corrosion ditch 6 with an open top is arranged on the platform 3, the top of the anti-corrosion ditch 6 is covered with a steel cover plate 7, one end of the steel cover plate 7 is arranged close to the inner side of the cofferdam 1, and the end close to the cofferdam 1 is rotatably connected to the top surface of the platform 3, and the width of the steel cover plate 7 is greater than the width of the entrance and exit 2.

[0019] In the structure of the present invention, since an entrance and exit 1 higher than the floor is provided, an inner vehicle ramp 4 and an outer vehicle ramp 5 are provided on both sides of the entrance and exit 1, the top surface of the inner vehicle ramp 5 is at most flush with the entrance and exit 1, so that the slope of the inner vehicle ramp 5 will not be too large, the slope will not be too long, and it will not occupy too much area in the floor, thereby avoiding affecting the driving and turning of forklifts, and there is no need to worry about the collision of the inner vehicle ramp 5 with the trough foundation, which is beneficial to the floor anti-corrosion slope drainage design.

[0020] At the same time, since there is a certain height difference between the floor and the entrance and exit 1, the height difference can prevent the bursting liquid from flowing out directly through the entrance and exit 1 when a bursting occurs. At the same time, when an accidental bursting occurs, the steel cover plate 7 can be quickly erected and combined with the cofferdam 1 to form a complete enclosure structure, thereby further preventing the bursting liquid from flowing out. The width of the steel cover plate 7 is greater than the width of the entrance and exit 2, ensuring that the erected steel cover plate 7 can completely cover the entrance and exit 2.

[0021] When an accidental tank burst occurs and the liquid in the tank is higher than the platform 3, the liquid can flow into the anti-corrosion trench 6 for collection and storage, which is convenient for subsequent treatment.

[0022] The wide parts of the inlet and outlet 2 on both sides of the surface of the steel cover plate 7 are provided with sealing strips 8, which can make the steel cover plate 7 fit tightly with the cofferdam 1 when it is erected, so as to prevent the bursting liquid from flowing out from the gap between the two when an accident occurs.

[0023] The portions on both sides of the surface of the steel cover plate 7 that are wide from the inlet and outlet 2 are all provided with sealing strips 8 to further improve the sealing performance.

[0024] The parts of the steel cover plate 7 on both sides of the surface of the entrance 2 are step-shaped structures; the cofferdam 1 on both sides of the entrance 2 is also a step-shaped structure. The step-shaped structure of the steel cover plate 7 is just connected with the step-shaped structure of the cofferdam.

[0025] A steel grate 9 is provided on the top of the anti-corrosion ditch 6 , and a steel cover plate 7 is covered on the steel grate 9 . The steel grate 9 can prevent some debris from directly flowing into the anti-corrosion ditch 6 .

[0026] The bottom of the anti-corrosion trench 6 is lower than the floor surface and can collect and store a large amount of burst slurry. The bottom of the anti-corrosion trench 6 is connected to the accident pool or sewage tank via the buried pipe 10. The burst slurry is sent to the accident pool or sewage tank via the buried pipe 10 so as to control the recovery and reuse of the corrosive slurry.

[0027] The steel cover plate 7 is set with a slope of 2% from the entrance and exit 2 to the inner vehicle ramp 4. The slope structure is used to prevent the burst slurry from flowing out. Secondly, when it rains, most of the rainwater flows down along the steel cover plate 7 to the inner vehicle ramp 4 and then flows to the inner floor of the cofferdam 1, avoiding a large amount of rainwater from flowing into the anti-corrosion ditch 6 from the joint between the steel cover plate 7 and the inner vehicle ramp 4.

[0028] The steel cover plate 7 is rotatably connected to the top surface of the platform 3 via hinges.

[0029] The entrance and exit 2 is 250 mm higher than the floor level inside the cofferdam 1, and the slope of the inner vehicle ramp 4 is 12%. The height and slope ensure that the inner vehicle ramp 4 does not occupy too much area. Furthermore, the height difference ensures that when an accident occurs and the tank bursts, personnel have enough time to erect the steel cover 7.

[0030] The present invention designs the elevation of the top of the cofferdam 1 at the entrance and exit 2 to be 250mm higher than the floor level there, the design slope of the inner vehicle ramp 4 at the entrance and exit 2 is 12%, the design width of the anti-corrosion ditch 6 between the platform 3 and the cofferdam 1 is about 300mm, the depth of the anti-corrosion ditch 6 is about 600mm, a steel grate 9 is attached to the top of the anti-corrosion ditch 6, and a steel cover plate 7 for vehicles is set on the steel grate 9 (with a 2% slope to prevent the slurry from flowing out and rainwater from flowing in at ordinary times). To facilitate the opening of the steel cover plate 7, the steel cover plate 7 can be set in blocks. The anti-corrosion ditch 6 is connected to the accident pool or sewage tank of the whole field through the buried pipe 10.

[0031] Under normal working conditions, the steel cover plate 7 on the anti-corrosion trench 6 can prevent rainwater from entering the anti-corrosion trench 6 and then entering the production system, increasing the production burden. When an accident occurs, the steel cover plate 7 is opened manually. After opening, the 90-degree control hinge and the cofferdams 1 on both sides are used to place the steel cover plate 7 against the inner side of the cofferdam 1 to play a temporary cofferdam effect. The two sides of the steel cover plate 7 should be 50mm wider than the entrance and exit 2. A sealing strip 8 is attached to the top surface of the edge of the steel cover plate 7 to increase the sealing effect of the temporary cofferdam. When the height of the burst slurry exceeds 250mm from the floor, it will flow into the anti-corrosion trench 6 through the steel grate 9 and then enter the accident pool or system, so that the corrosive slurry can be controlled, recycled and reused.

Claims

1. An anti-corrosion ground entrance and exit, characterized in that: The invention comprises an entrance (2) opened on the cofferdam (1), the entrance (2) being higher than the floor of the inner side of the cofferdam (1), a platform (3) being arranged on the inner side of the entrance (2), an inner vehicle ramp (4) being arranged on the other end of the platform (3), an outer vehicle ramp (5) being connected to the outer side of the entrance (2), an anti-corrosion ditch (6) with an open top being arranged on the platform (3), a steel cover plate (7) covering the top of the anti-corrosion ditch (6), one end of the steel cover plate (7) being arranged close to the inner side of the cofferdam (1), and the end being rotatably connected to the top surface of the platform (3), and the width of the steel cover plate (7) being greater than the width of the entrance (2); The steel cover plate (7) is provided with a slope of 2% from the entrance (2) toward the inner vehicle ramp (4); The bottom of the anti-corrosion trench (6) is lower than the floor surface, and the bottom of the anti-corrosion trench (6) is connected to an accident pool or a sewage tank via a buried pipe (10).

2. The anti-corrosion ground entrance and exit according to claim 1, characterized in that: Sealing strips (8) are provided on the wide portions of the inlet and outlet (2) on both sides of the surface of the steel cover plate (7).

3. The anti-corrosion ground entrance and exit according to claim 2, characterized in that: The portions of the steel cover plate (7) on both sides of the surface wider than the inlet and outlet (2) are all provided with sealing strips (8).

4. The anti-corrosion ground entrance and exit according to claim 2, characterized in that: The portions on both sides of the surface of the steel cover plate (7) wider than the inlet and outlet (2) are of a step-type structure; the cofferdams (1) on both sides of the inlet and outlet (2) are also of a step-type structure.

5. The anti-corrosion ground entrance and exit according to claim 1, characterized in that: A steel grate (9) is arranged on the top of the anti-corrosion ditch (6), and a steel cover plate (7) is covered on the steel grate (9).

6. The anti-corrosion ground entrance and exit according to claim 1, characterized in that: The steel cover plate (7) is rotatably connected to the top surface of the platform (3) via hinges.

7. The anti-corrosion ground entrance and exit according to claim 1, characterized in that: The entrance and exit (2) is 250 mm higher than the floor level inside the cofferdam (1).

8. The anti-corrosion ground entrance and exit according to claim 1, characterized in that: The slope of the inner vehicle ramp (4) is 12%.

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