Drainage device applied to outer floating roof of storage tank

Abstract

The utility model discloses a drainage device applied to an external floating roof of a storage tank, which comprises a valve seat and a counterweight baffle, and a drainage port is arranged in the center of the external floating roof of the storage tank; the valve seat comprises a valve seat body and a guide plate which are connected into a whole, the guide plate is located on the notch side of the bottom of the valve seat body and distributed in the inclined direction of the notch, and therefore a drainage hole is formed between the bottom of the valve seat body and the guide plate. The valve seat body is mounted on the water outlet; the counterweight baffle is hinged to the side, close to the drainage hole, of the bottom of the guide plate and corresponds to the drainage hole in position. According to the utility model, the counterweight baffle can be opened during water drainage, and the water drainage hole can be blocked in time when water is not drained, so that when liquid fluctuates, the liquid can be prevented from rising to the floating roof, and the volatilization of VOC (Volatile Organic Compounds) is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of external floating roof structures of storage tanks, and more particularly to a drainage device applied to the external floating roof of storage tanks. Background Art

[0002] For large-scale storage tanks for petroleum or chemicals, VOCs emissions are being controlled due to the presence of volatile media in response to the need to strengthen environmental protection. Among these, fully liquid-contacted composite external floating roofs are one of the most effective devices for preventing VOCs emissions from volatile liquids.

[0003] Currently, the external floating roof structure mainly consists of an external floating roof body, a static discharge device, an automatic vent valve, an anti-rotation device, and a drainage device. The upper surface of the external floating roof body adopts a gradual trapezoidal structure to ensure that rainwater from the top drains smoothly to the center. Rainwater accumulated in the center of the external floating roof body is discharged through the central drain pipe. However, the current drainage device cannot effectively prevent the volatilization of gases and the rise of liquids to the floating roof.

[0004] Therefore, providing a reliable drainage device for use in external floating roofs of storage tanks is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the utility model provides a drainage device applied to the external floating roof of a storage tank to solve the technical problems of liquid overflow and gas volatilization when there is liquid fluctuation.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A drainage device used for an external floating roof of a storage tank includes a valve seat and a counterweight baffle, with a drainage outlet provided in the center of the external floating roof of the storage tank; the valve seat includes a valve seat body and a guide plate connected as one body, the guide plate being located on the notch side of the bottom of the valve seat body and distributed along the inclination direction of the notch, thereby forming a drainage hole between the bottom of the valve seat body and the guide plate; the valve seat body is installed on the drainage outlet; the counterweight baffle is hinged to the bottom of the guide plate near the drainage hole and corresponds to the position of the drainage hole.

[0008] By adopting the above technical solutions, the beneficial effects of the utility model are:

[0009] The counterweight baffle can be opened during drainage, and the drainage hole can be blocked in time when drainage is not required, thereby preventing the liquid from rising to the floating roof when liquid fluctuates and preventing the volatilization of VOC.

[0010] Furthermore, the counterweight baffle includes an anti-backflow baffle and a counterweight plate connected as one body, and the angle between the anti-backflow baffle and the counterweight plate is 115°; a hinge seat is fixed to the bottom of the guide plate near the drainage hole; the anti-backflow baffle and the counterweight plate are installed on the hinge seat through hinge bodies on both sides of the intersection position, so that the anti-backflow baffle is 0° or 85° in the horizontal direction with the drainage hole, and the angle between the counterweight plate and the guide plate is 85° or 0°.

[0011] The beneficial effect of adopting the above-mentioned further technical solution is to ensure that the opening degree of the anti-backflow baffle can meet the area of ​​the drainage hole, and to ensure that the counterweight plate can meet the effective sealing of the anti-backflow baffle and the drainage hole.

[0012] Furthermore, the top edge of the valve seat body is placed on the upper end edge of the drain outlet.

[0013] Furthermore, the valve seat body and the guide plate are both made of stainless steel.

[0014] The beneficial effects of adopting the above-mentioned further technical solution are light weight, high strength, and resistance to corrosion in exposed environments.

[0015] Furthermore, it also includes a filter screen, which is installed on the top of the valve seat body.

[0016] The beneficial effect of adopting the above-mentioned further technical solution is to prevent foreign matter from entering.

[0017] Furthermore, the drainage hole is semicircular. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0019] Figure 1 The accompanying drawing is a schematic diagram of the overall structure of a drainage device applied to an external floating roof of a storage tank provided by the present invention;

[0020] Figure 2 The accompanying drawing is a schematic structural diagram of the valve seat provided by the present utility model;

[0021] Figure 3 The accompanying drawing is a structural schematic diagram of the valve seat provided by the present invention from another perspective;

[0022] Figure 4The accompanying drawing is a schematic structural diagram of the counterweight baffle provided by the present invention;

[0023] Figure 5 The accompanying drawing is a structural schematic diagram of a closed state of a drainage device applied to an external floating roof of a storage tank provided by the present invention;

[0024] Figure 6 The accompanying drawing is a structural schematic diagram of a drainage device provided by the present invention and applied to an external floating roof of a storage tank in a drainage state. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1-6 As shown, the embodiment of the present invention discloses a drainage device for an external floating roof of a storage tank, comprising a valve seat 1 and a counterweight baffle 2, with a drain port 3 in the center of the external floating roof. The valve seat 1 comprises an integrally connected valve seat body 11 and a guide plate 12. The guide plate 12 is located on the notch side of the bottom of the valve seat body 11 and is arranged along the inclination direction of the notch, thereby forming a drain hole 13 between the bottom of the valve seat body 11 and the guide plate 12. In this embodiment, the drain hole 13 is semicircular in shape. The valve seat body 11 is mounted on the drain port 3. In this embodiment, the top edge of the valve seat body 11 is positioned at the upper edge of the drain port 3. The counterweight baffle 2 is hingedly connected to the bottom of the guide plate 12 near the drain port 13 and corresponds to the position of the drain port 13. The utility model can promptly open the counterweight baffle 2 when water enters the valve seat 1 and promptly block the drain port 13 when water is not being discharged. This prevents liquid from flowing onto the floating roof when liquid fluctuations occur, thereby preventing the volatilization of VOCs.

[0027] Specifically, the counterweight baffle 2 includes an anti-backflow baffle 21 and a counterweight plate 22 connected as one body, and the angle between the anti-backflow baffle 21 and the counterweight plate 22 is 115°; a hinge seat 14 is fixed to the bottom of the guide plate 12 near the drain hole 13; the anti-backflow baffle 21 and the counterweight plate 22 are installed on the hinge seat 14 through hinge bodies on both sides of the intersection position, so that the anti-backflow baffle 21 and the drain hole 13 are 0° or 85° in the horizontal direction, and the angle between the counterweight plate 22 and the guide plate 12 is 85° or 0°, thereby ensuring that the opening degree of the anti-backflow baffle 21 can meet the area of ​​the drain hole 13, and ensuring that the counterweight plate 22 can meet the effective sealing of the anti-backflow baffle 21 and the drain hole 13.

[0028] Specifically, the valve seat body 11 and the guide plate 12 are both made of stainless steel, which is light in weight and high in strength, and can withstand corrosion in exposed environments.

[0029] In order to further optimize the technical solution of the present invention, a filter screen 4 is further included. The filter screen 4 is installed on the top of the valve seat body 11 to prevent debris from entering.

[0030] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0031] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drainage device applied to an external floating roof of a storage tank, characterized in that: It includes a valve seat and a counterweight baffle, and a drain outlet is provided in the center of the external floating roof of the storage tank; the valve seat includes a valve seat body and a guide plate connected as one body, the guide plate is located on the notch side of the bottom of the valve seat body and is distributed along the inclination direction of the notch, thereby forming a drain hole between the bottom of the valve seat body and the guide plate; the valve seat body is installed on the drain outlet; the counterweight baffle is hinged to the bottom of the guide plate near the drain hole and corresponds to the position of the drain hole.

2. The drainage device for an external floating roof of a storage tank according to claim 1, characterized in that: The counterweight baffle includes an anti-backflow baffle and a counterweight plate connected as one body, and the angle between the anti-backflow baffle and the counterweight plate is 115°; a hinge seat is fixed to the bottom of the guide plate near the drainage hole; the anti-backflow baffle and the counterweight plate are installed on the hinge seat through hinge bodies on both sides of the intersection position, so that the anti-backflow baffle is 0° or 85° in the horizontal direction with the drainage hole, and the angle between the counterweight plate and the guide plate is 85° or 0°.

3. A drainage device for an external floating roof of a storage tank according to claim 1 or 2, characterized in that: The top edge of the valve seat body is placed on the upper end edge of the drain outlet.

4. The drainage device for an external floating roof of a storage tank according to claim 1, characterized in that: The valve seat body and the guide plate are both made of stainless steel.

5. The drainage device for an external floating roof of a storage tank according to claim 1, characterized in that: It also includes a filter screen, which is installed on the top of the valve seat body.

6. The drainage device for an external floating roof of a storage tank according to claim 3, characterized in that: The drainage hole is semicircular.

Images