A structure of a membrane plate around a pump tower guide base

Abstract

The present invention relates to the technical field of pump tower guide bases, and discloses a form of arrangement of film plates around a pump tower guide base, comprising a pump tower guide base body, a first metal sheet, a second metal sheet, a first lap plate, a second lap plate, a first fastening plate, a first flange stud, a second fastening plate, a second flange stud, a third fastening plate, a third flange stud, a fourth fastening plate, a fourth flange stud, a film connecting plate, and fixing screws. In the present invention, the film plates are arranged around the guide base of a pump tower in a liquid cargo ship cabin or a liquid cargo land storage tank, and the film plates in the area are sealed by welding; the installation sequence is clear, easy to understand, easy to operate, and easy to implement and apply; the problem of arranging metal film components can be solved, and the deviation between metal films can be controlled; the arrangement is simple and easy to understand, and is convenient for on-site construction operations.

Description

Technical Field

[0001] The invention belongs to the technical field of pump tower guide bases, and in particular relates to a structure of a film plate around a pump tower guide base. Background Art

[0002] Membrane-type cargo tanks, attached to the ship's hull structure, are lightweight and offer high capacity utilization, making them predominantly used on large LNG carriers. The primary challenge facing this type of tank is the sloshing effects of the liquid within. Furthermore, these tanks are complex and expensive to construct, require complex maintenance and repair procedures, and exhibit poor reliability, requiring a complete secondary barrier to prevent leakage. This type of tank is particularly advantageous when used in large and ultra-large transport applications.

[0003] Liquid cargo loaded in the cargo holds of liquid cargo ships or land-based liquid cargo storage tanks is discharged through liquid pumps and pipelines mounted on a pump tower that extends vertically into the tank or tank bottom. The pump tower is fixed at the top and limited at the middle and bottom, or fixed at the top only and limited at the bottom. The structural component of the pump tower with a bottom limit is called the pump tower guide base. To prevent liquid cargo leakage, the metal film in contact with the liquid cargo must be sealed and well supported. However, the metal film components surrounding the pump tower guide base are numerous and space is limited. How to rationally arrange these numerous components is a major construction challenge in this area.

[0004] In view of this, it is very necessary to invent an arrangement form of the membrane plates around the guide base of the pump tower. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, the present invention provides a structure of film plates around the guide base of a pump tower, which is used for arranging the film plates around the guide base of a pump tower in a liquid cargo transport ship hold or a liquid cargo land storage tank, and achieves the effect of sealing the film plates in the area by welding; it can solve the problem of arranging metal film components and control the deviation between metal films; the arrangement is simple and easy to understand, and is convenient for on-site construction operations.

[0006] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0007] The present invention provides a membrane plate structure surrounding a pump tower guide base, comprising a pump tower guide base body, a first metal sheet, a second metal sheet, a first lap plate, a second lap plate, a first fastening plate, a first flange stud, a second fastening plate, a second flange stud, a third fastening plate, a third flange stud, a fourth fastening plate, a fourth flange stud, a membrane connecting plate, and fixing screws. Each component is prefabricated and, after being produced according to design drawings, is connected on-site according to a specific arrangement.

[0008] The pump tower guide base body is a prefabricated structural component in the workshop; the upper surfaces of the first fastening plate, the second fastening plate, the third fastening plate, and the fourth fastening plate are flush with the upper surfaces of the wing plates of the pump tower guide base body; the first metal sheet and the second metal sheet press the first fastening plate, the second fastening plate, the third fastening plate, and the fourth fastening plate and are fixed to the pump tower guide base body by overlapping; the first flange stud, the second flange stud, the third flange stud and the fourth flange stud are fixed to the first fastening plate, the second fastening plate, and the second fastening plate through the reserved openings on the first metal sheet and the second metal sheet. plate, a third fastening plate, and a fourth fastening plate; the first flange stud, the second flange stud, the third flange stud and the fourth flange stud are welded and fixed to the overlapping position of the first metal sheet and the second metal sheet, and the first metal sheet and the second metal sheet are welded together by the first lap plate and the second lap plate; the first metal sheet and the second metal sheet are fixed to the lower support member by fixing screws; the flanging position between each three adjacent plates of the film connecting plate is curled and welded; the film connecting plate is overlapped on the first metal sheet and the second metal sheet and welded.

[0009] As an improvement to the above technical solution, the pump tower guide base body is a conical opening structure, a conical and cylindrical combined structure, or a conical truss structure. The size of the pump tower guide base body is adjusted according to the size of the pump pipe, and the number is adjusted according to the number of pump pipes to be positioned. The relationship between the number of pump pipes and the number of pump tower guide base bodies (1) is: The hollow space of the main structure of the pump tower guide base is filled with glass wool, aerogel, perlite or in-situ foam to provide insulation. The number of wing plates on the pump tower guide base can be single or multi-layer.

[0010] As an improvement to the above technical solution, the first and second metal sheets are welded together via the first and second lap plates. However, the first and second metal sheets may also be directly butt-welded or lap-welded together without the lap plates. The first and second metal sheets may be secured to the lower support member by screws or adhesive.

[0011] As an improvement to the above technical solution, the arrangement of the membrane connecting plates around the main body of the pump tower guide base, the first metal sheet and the second metal sheet, the first lap plate and the second lap plate, and the membrane connecting plate are made of at least one of stainless steel, iron-nickel alloy steel, high manganese steel, titanium-containing iron-carbon alloy, or a composite material of aluminum foil and glass fiber. The thickness of the first metal sheet and the second metal sheet, the first lap plate and the second lap plate, and the membrane connecting plate are all 0.5mm-3mm. It can be arranged in various forms such as horizontal, vertical or oblique, but it needs to cover the screw position. The metal plates can be assembled in different ways such as pre-installed as a whole, spliced ​​on site, or cut and welded on site. The first metal sheet and the second metal sheet are provided with reserved holes, and the diameter of the reserved holes is 5mm-40mm.

[0012] As an improvement of the above technical solution, the top slots of the first flange stud, the second flange stud, the third flange stud and the fourth flange stud can be in the form of different convex or concave grooves such as a straight line, a cross, a flower shape and a hexagonal shape.

[0013] As an improvement of the above technical solution, the material and size of the first fastening plate, the second fastening plate, the third fastening plate, and the fourth fastening plate are at least one of stainless steel, iron-nickel alloy steel, high manganese steel, titanium-containing iron-carbon alloy, or fiberglass.

[0014] As an improvement to the above technical solution, each plate of the membrane connecting plate has two flanges, which are overlapped and welded together by the rolled edges, or the plate is in the form of a flat plate, which is overlapped, welded or bonded together.

[0015] The thin film connecting plate is sealed by argon arc TIG welding. If there is a structurally compatible glue bonding method that can achieve a sealing effect, it can be used.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The order of installation of components in this arrangement is pump tower guide base body, first fastening plate, second fastening plate, third fastening plate, fourth fastening plate, first metal sheet and second metal sheet, first lap plate and second lap plate, fixing screws, first flange studs, second flange studs, third flange studs and fourth flange studs, and film connecting plate. The installation order is clear, easy to understand, easy to operate, and convenient to implement and apply; it can solve the problem of arrangement of metal film components and control the deviation between metal films; the arrangement is simple and easy to understand, and is convenient for on-site construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2-6 Schematic diagrams of different structures of the pump tower guide base body of the present invention.

[0021] Figure 7 This is a schematic diagram of the flange stud and fastening plate combined together

[0022] In the picture:

[0023] 1. Pump tower guide base body; 2. First metal sheet; 3. Second metal sheet; 4. First lap plate; 5. Second lap plate; 6. First fastening plate; 7. First flange stud; 8. Second fastening plate; 9. Second flange stud; 10. Third fastening plate; 11. Third flange stud; 12. Fourth fastening plate; 13. Fourth flange stud; 14-25. Film connecting plate; 26. Fixing screws. DETAILED DESCRIPTION

[0024] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0027] like Figure 1 and Figure 2 As shown, the present invention provides an embodiment 1:

[0028] Provides a structure of membrane plates around the pump tower guide base, including a fixing block 1 as shown in the attached Figure 1 To the attached Figure 2 As shown, the present invention provides a structure of a membrane plate around a pump tower guide base, comprising a pump tower guide base body 1, a first metal sheet 2, a second metal sheet 3, a first lap plate 4, a second lap plate 5, a first fastening plate 6, a first flange stud 7, a second fastening plate 8, a second flange stud 9, a third fastening plate 10, a third flange stud 11, a fourth fastening plate 12, a fourth flange stud 13, membrane connecting plates 14-25 and fixing screws 26,

[0029] The pump tower guide base body 1 is a prefabricated structural component in the workshop; the upper surfaces of the first fastening plate 6, the second fastening plate 8, the third fastening plate 10, and the fourth fastening plate 12 are flush with the upper surface of the wing plate of the pump tower guide base body 1; the first metal sheet 2 and the second metal sheet 3 press the first fastening plate 6, the second fastening plate 8, the third fastening plate 10, and the fourth fastening plate 12 and are fixed to the pump tower guide base body 1 by lap welding; the first flange stud 7, the second flange stud 9, the third flange stud 11 and the fourth flange stud 13 are fixed to the first fastening plate 6, the second fastening plate 8, The third fastening plate 10 and the fourth fastening plate 12; the first flange stud 7, the second flange stud 9, the third flange stud 11 and the fourth flange stud 13 are welded and fixed to the overlapping position of the first metal sheet 2 and the second metal sheet 3, and the first metal sheet 2 and the second metal sheet 3 are welded and connected by the first lap plate 4 and the second lap plate 5; the first metal sheet 2 and the second metal sheet 3 are fixed to the lower support by fixing screws 26; the film connecting plates 14-25 are curled and welded at the flange position between each three adjacent plates; the film connecting plates 14-25 are overlapped on the first metal sheet 2 and the second metal sheet 3 and welded.

[0030] As an improvement to the above technical solution, the arrangement of the membrane connecting plates 14-25 around the pump tower guide base body 1, the first metal sheet 2 and the second metal sheet 3, the first lap plate 4 and the second lap plate 5, and the membrane connecting plates 14-25 are made of at least one of stainless steel, iron-nickel alloy steel, high manganese steel or titanium-containing iron-carbon alloy.

[0031] As an improvement to the above technical solution, the thickness of the first metal sheet 2 and the second metal sheet 3, the first lap plate 4 and the second lap plate 5, and the film connecting plates 14-25 are all 0.5mm-3mm.

[0032] As an improvement of the above technical solution, a reserved hole is opened on the lower outer edge of the pump tower guide base body 1; the diameter of the reserved hole is 5mm-40mm.

[0033] The provision of the reserved holes facilitates the first flange stud 7 , the second flange stud 9 , the third flange stud 11 and the fourth flange stud 13 to be installed in the first fastening plate 6 , the second fastening plate 8 , the third fastening plate 10 and the fourth fastening plate 12 .

[0034] As an improvement of the above technical solution, the thin film connecting plates 14-25 are sealed by argon arc TIG welding. If there is a structurally compatible glue bonding method that can achieve a sealing effect, it can be used.

[0035] How it works

[0036] When the present invention is in use, as an improvement of the above-mentioned technical solution, the order of installing the components in the present arrangement is as follows: first, install the pump tower guide base body 1, then install the first fastening plate 6, the second fastening plate 8, the third fastening plate 10, the fourth fastening plate 12, then install the first metal sheet 2 and the second metal sheet 3, then install the first lap plate 4 and the second lap plate 5, then install the fixing screws 26, continue to install the first flange stud 7, the second flange stud 9, the third flange stud 11 and the fourth flange stud 13, and finally install the film connecting plates 14-25.

[0037] In this sequence, the pump tower guide base body 1 plays the role of positioning and guiding the pump tower and is welded to the bottom steel plate in advance.

[0038] In this order, the first fastening plate 6 , the second fastening plate 8 , the third fastening plate 10 , and the fourth fastening plate 12 function to fix the thermal insulation module adjacent to the pump tower guide base body 1 .

[0039] In this sequence, the first metal sheet 2 and the second metal sheet 3 are laid on the thermal insulation module and the pump tower guide base body 1, fixed to the thermal insulation module by fixing screws 26, and fixed to the pump tower guide base body 1 by welding.

[0040] In this sequence, the first lap plate 4 and the second lap plate 5 are installed at the butt joint of the first metal sheet 2 and the second metal sheet 3, and then welded to connect the first metal sheet 2 and the second metal sheet 3.

[0041] In this sequence, the first flange stud 7, the second flange stud 9, the third flange stud 11 and the fourth flange stud 13 are respectively screwed into the first fastening plate 6, the second fastening plate 8, the third fastening plate 10 and the fourth fastening plate 12 through the reserved holes on the first metal sheet 2 and the second metal sheet 3, and are overlap-welded with the first metal sheet 2 and the second metal sheet 3.

[0042] As an improvement to the above technical solution, the installation sequence of the first flange stud 7 , the second flange stud 9 , the third flange stud 11 and the fourth flange stud 13 can be adjusted as needed.

[0043] As an improvement to the above technical solution, the first metal sheet 2 and the second metal sheet 3 are at the bottom, and the film connecting plates 14-25 are at the top. This can be changed to the installation order of the film connecting plates 14-25 at the bottom, and the first metal sheet 2 and the second metal sheet 3 at the top.

[0044] As an improvement of the above technical solution, the pump tower guide base body 1 is prefabricated in a workshop and can be assembled on site instead.

[0045] As an improvement to the above technical solution, the film connecting plates 14-25 are prefabricated parts in a workshop and can be processed and manufactured on site if suitable equipment and tools are available on site.

[0046] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A structure of a membrane plate around a pump tower guide base, comprising a pump tower guide base body (1), characterized in that: It also includes a first metal sheet (2), a second metal sheet (3), a first lap plate (4), a second lap plate (5), a first fastening plate (6), a first flange stud (7), a second fastening plate (8), a second flange stud (9), a third fastening plate (10), a third flange stud (11), a fourth fastening plate (12), a fourth flange stud (13), 12 film connecting plates (14) to (25) and fixing screws (26). The above components are all prefabricated parts. After being produced according to the design drawings, they are connected together on site according to a certain layout relationship; the layout relationship is as follows: The pump tower guide base body (1) is a prefabricated structural component in a workshop; the upper surfaces of the first fastening plate (6), the second fastening plate (8), the third fastening plate (10), and the fourth fastening plate (12) are all flush with the upper surface of the wing plate of the pump tower guide base body (1); the first metal sheet (2) and the second metal sheet (3) press the first fastening plate (6), the second fastening plate (8), the third fastening plate (10), and the fourth fastening plate (12), and are all fixed to the pump tower guide base body (1) by overlapping connection; the first flange stud ( 7), the second flange stud (9), the third flange stud (11) and the fourth flange stud (13) are fixed to the first fastening plate (6), the second fastening plate (8), the third fastening plate (10) and the fourth fastening plate (12) by means of threads through the reserved holes on the first metal sheet (2) and the second metal sheet (3); the first flange stud (7), the second flange stud (9), the third flange stud (11) and the fourth flange stud (13) are all welded and fixed to the overlapping positions of the first metal sheet (2) and the second metal sheet (3); The size of the pump tower guide base body (1) is adjusted according to the size of the pump pipe, and the number of the pump tower guide base bodies (1) is adjusted according to the number of pump pipes to be positioned; the relationship between the number of pump pipes and the number of pump tower guide base bodies (1) is: ； Wherein, M is the number of pump tower guide base bodies (1), X is the number of pump tubes, n=1, 2, 3... When the pump pipe is a single one, a pump tower guide base body (1) is provided under each pump pipe; when multiple pump pipes are combined together by a fixing frame to form a pump tower composite structure, a number of pump tower guide base bodies (1) not exceeding the number of pump pipes is provided at the bottom of the pump tower; A Teflon stopper is provided on the inner side of the upper circular tube of the pump tower guide base body (1), and the Teflon stopper is directly fixed to the circular tube of the pump tower guide base body (1) with screws, or a limiting groove is welded on the inner side of the circular tube, and the Teflon stopper is inserted into the limiting groove and fixed; the Teflon stopper is evenly distributed along the inner side of the circular tube; the relationship between the number of the Teflon stopper and the number of the pump tower guide base body (1) is: ； Wherein, M is the number of the pump tower guide base body (1), Z is the number of Teflon blocks, q=3, 4, 5, 6... The first metal sheet (2) and the second metal sheet (3) are provided with reserved holes, which are filled with heat-insulating material. The diameter of the reserved holes is 5 mm to 40 mm. The number and position of the reserved holes are changed on the first metal sheet (2) and the second metal sheet (3) according to design requirements. The number of the reserved holes corresponds to the number of fastening plates.

2. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: The pump tower guide base body (1) is a tapered opening structure, a tapered and cylindrical combined structure, or a tapered truss structure.

3. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: In order to ensure that the overall thermal insulation effect of the pump tower guide base body (1) meets the requirements, glass wool, aerogel, perlite or on-site foaming is stuffed into the hollow space of the pump tower guide base body (1) structure to achieve thermal insulation effect.

4. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: The pump tower guide base body (1) is provided with wing plates for connecting and fixing the first metal sheet (2) and the second metal sheet (3); the number of the wing plates is a single layer, or the number of the wing plates is multiple layers; the height of the upper surface of each layer of wing plates from the bottom of the pump tower guide base body (1) corresponds to the total thickness of the insulation layer where each layer is located from the deck or tank wall; the relationship between the number of wing plates and the number of the pump tower guide base body (1) is as follows: ； Wherein, M is the number of the pump tower guide base bodies (1), Y is the number of Teflon blocks, and p=1, 2, 3, 4...

5. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: The pump tower guide base body (1) is provided with a wing plate, which is circular, rectangular or other regular polygonal.

6. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: The flange positions between each three adjacent plates in the 12 thin film connecting plates (14)-(25) are rolled and welded; the 12 thin film connecting plates (14)-(25) are overlapped on the first metal sheet (2) and the second metal sheet (3) and welded.

7. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: The first metal sheet (2) and the second metal sheet (3) are welded together via a first lap plate (4) and a second lap plate (5); or the first metal sheet (2) and the second metal sheet (3) are directly butt-welded together or directly lap-welded together without the need for the first lap plate (4) and the second lap plate (5).

8. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: The first metal sheet (2) and the second metal sheet (3) are fixed to the lower support member by fixing screws (26), and the first metal sheet (2) and the second metal sheet (3) and the lower support member include pre-machined screw grooves; or, the first metal sheet (2) and the second metal sheet (3) are fixed to the lower support member by bonding or anchoring, without the need for fixing screws (26).

9. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: The first metal sheet (2) and the second metal sheet (3) are assembled together by any one of overall pre-assembly, on-site splicing or on-site cutting and welding, and a hollow circle, rectangle or other regular polygon is formed in the middle; or the first metal sheet (2) and the second metal sheet (3) are processed into a whole plate of a hollow circle, rectangle or other regular polygon, which is integrally inserted into the pump tower guide base body (1) and overlapped on its wing plate; the first metal sheet (2) and the second metal sheet (3) are fixed to the wing plate of the pump tower guide base body (1) by any one of threading, welding, anchoring, laser and glue.

10. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: The 12 film connecting plates (14)-(25) are symmetrically arranged around the pump tower guide base body (1); the 12 film connecting plates (14)-(25) are symmetrically arranged on both sides, or the 12 film connecting plates (14)-(25) are symmetrically arranged on all sides, or the 12 film connecting plates (14)-(25) are symmetrically arranged in a circular shape.

11. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: The 12 film connecting plates (14)-(25) are overlapped on the first metal sheet (2) and the second metal sheet (3) in any one of a horizontal, vertical or oblique arrangement, and cover the fixing screws (26).

12. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: The first metal sheet (2) and the second metal sheet (3), the first lap plate (4) and the second lap plate (5), and the 12 film connecting plates (14)-(25) are all made of at least one of stainless steel, iron-nickel alloy steel, high manganese steel, titanium-containing iron-carbon alloy, or a composite material of aluminum foil and glass fiber.

13. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: The thickness of the first metal sheet (2), the second metal sheet (3), the first lap plate (4), the second lap plate (5), and the 12 film connecting plates (14)-(25) are all 0.5 mm-3 mm.

14. The structure of the membrane plate around the pump tower guide base according to claim 1, characterized in that: The first fastening plate (6), the second fastening plate (8), the third fastening plate (10), and the fourth fastening plate (12) are all distributed below the first metal sheet (2) and the second metal sheet (3), and correspond to the positions and numbers of the reserved holes on the first metal sheet (2) and the second metal sheet (3).

15. The structure of the membrane plate around the guide base of the pump tower according to claim 1, characterized in that: The provision of the reserved holes facilitates the first flange stud (7), the second flange stud (9), the third flange stud (11) and the fourth flange stud (13) to be respectively installed in the first fastening plate (6), the second fastening plate (8), the third fastening plate (10) and the fourth fastening plate (12), and the number and position of the flange studs correspond to the number and position of the fastening plates.

16. The structure of the membrane plate around the guide base of the pump tower according to claim 1, characterized in that: The top slots of the first flange stud (7), the second flange stud (9), the third flange stud (11), and the fourth flange stud (13) are in any of the following forms: a straight line, a cross, a flower shape, or a hexagonal shape.

17. The structure of the membrane plate around the guide base of the pump tower according to claim 1, characterized in that: The first fastening plate (6), the second fastening plate (8), the third fastening plate (10), and the fourth fastening plate (12) are made of at least one of stainless steel, iron-nickel alloy steel, high manganese steel, titanium-containing iron-carbon alloy, or glass fiber reinforced plastic.

18. The structure of the membrane plate around the guide base of the pump tower according to claim 1, characterized in that: The first lap plate (4) and the second lap plate (5) are long flat plates or have shoulder structures at their ends.

19. The structure of the membrane plate around the guide base of the pump tower according to claim 1, characterized in that: Each of the 12 film connecting plates (14)-(25) has two flanges, and the flanges of adjacent plates are tightly fitted and finally welded together; or, the 12 film connecting plates (14)-(25) are in the form of flat plates, which are overlapped, welded or bonded together.

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