Multi-layer sealing water leakage prevention water collecting basin for cooling tower

Abstract

The utility model discloses a kind of cooling tower multilayer sealing water leakage prevention water-collecting basin, belong to cooling tower technical field, including the water-collecting basin bottom surface formed by the bottom plate splicing combination of multiple;The four edges of each bottom plate are bent downward to form flange;Adjacent bottom plate is fixed by bolt on flange and is connected each other;The flange of the side of bottom plate is provided with the strip-shaped recess formed by recessing inward, and the flange of the opposite side is provided with the convex strip of Z-shaped bending and protruding outward;Adjacent bottom plate is spliced by recess and protrusion cooperation. The utility model discloses the butt joint edge of cooling tower water-collecting basin is designed as Z-shaped multilayer bending structure, to form multiple sealing barrier by multilayer adhesion, and reduce the amount of bolt, to significantly improve the water leakage prevention performance under the premise of not increasing material, reduce manufacturing cost and simplify production process.

Description

Technical Field

[0001] This utility model belongs to the field of cooling tower technology, specifically a multi-layer sealed leak-proof water collection basin for cooling towers. Background Technology

[0002] The cooling tower water collection basin is a crucial component used to collect circulating cooling water and prevent leaks. Currently, the most commonly used water collection basin structures in the industry mainly include the following two types: Figures 1-2 As shown:

[0003] The welded structure consists of multiple steel plates bent into right angles, with the vertical and bottom edges of each plate fixed by welding. Finally, the entire structure is ground and treated with anti-corrosion coating. A horizontal reinforcing bar is located at the bottom. The process flow is: bending → welding → grinding → anti-corrosion coating.

[0004] Existing defects:

[0005] (1) The welding requirements are high, and the weld is prone to defects such as porosity and cracks, which may lead to leakage risks;

[0006] (2) The welding heat is concentrated, and the plate is prone to thermal deformation, which affects the flatness and sealing of the water collection basin;

[0007] (3) Anti-corrosion treatment requires the extensive use of paint or chemical coatings, which is environmentally unfriendly and increases the number of processes;

[0008] (4) Many processes, low efficiency and high cost.

[0009] The single-layer sealed bolt connection structure involves bending a steel plate into a right angle, applying a single layer of butyl tape or polyurethane adhesive to the joint, and then securing it with bolts. The process flow is: bending → applying adhesive → bolt connection.

[0010] Existing defects:

[0011] (1) The seal is achieved by relying on a single layer of adhesive, which has low sealing reliability and is prone to aging and cracking after long-term use;

[0012] (2) To prevent water leakage, the bolts need to be arranged closely, which increases the amount of installation work;

[0013] (3) A large amount of sealing edge needs to be reserved at the right-angle joint of the bent board, resulting in low material utilization;

[0014] (4) The overall water-proof capability is limited, and the maintenance frequency is high.

[0015] Neither of the two structures mentioned above can simultaneously achieve sealing reliability, process simplification, cost reduction, and environmental friendliness, making them a technical problem that urgently needs to be solved in the industry. Utility Model Content

[0016] To address the above problems, this utility model provides a multi-layer sealed leak-proof water collection basin for cooling towers. By designing the butt joint of the cooling tower water collection basin as a Z-shaped multi-layer bending structure, multiple layers are bonded together to form multiple sealing barriers, and the amount of bolts used is reduced. This significantly improves the leak-proof performance, reduces manufacturing costs, and simplifies the production process without increasing the amount of material used.

[0017] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0018] A multi-layer sealed leak-proof water collection basin for cooling towers includes a bottom surface of the water collection basin composed of multiple base plates spliced ​​together; each base plate has four sides bent downwards to form folded edges; adjacent base plates are connected and fixed to each other by bolts on the folded edges; a strip-shaped groove is provided on one side of the folded edge of the base plate, which is recessed inwards, and a Z-shaped protruding strip is provided on the opposite side of the folded edge; adjacent base plates are spliced ​​together by the groove and the protrusion.

[0019] The beneficial effects of the above technical solution are as follows: the interlacing of the groove and the raised Z-shape forms a continuous tortuous sealing path, which significantly extends the seepage channel, thereby improving the reliability of the first seepage barrier and reducing the risk of leakage without adding additional sealing material.

[0020] The convex strip is formed by a Z-shaped bend in the folded edge, creating an outward-convex triangular structure; the groove is formed by a Z-shaped bend in the folded edge, creating an inward-concave triangular groove structure.

[0021] The beneficial effects of the above technical solution are as follows: the triangular cross section forms three-point positioning during splicing, which not only improves the assembly accuracy, but also generates a self-locking effect when under force, further preventing liquid from seeping along the joint. At the same time, it simplifies the plate bending mold and makes the processing consistency better.

[0022] As a further improvement to the above solution, a support plate is provided on one side of the bottom of the base plate.

[0023] The beneficial effects of the above technical solution are: the support plate disperses and transfers the local concentrated load of the base plate to the lower structure, preventing the base plate from undergoing plastic deformation under long-term water pressure and extending the service life of the water collection basin.

[0024] As a further improvement to the above solution, a reinforcing rib is provided below the base plate, which is placed horizontally; support feet are provided at both ends of the reinforcing rib to support downwards; mounting holes are provided on the support feet; the mounting holes are connected to the support plate by bolts.

[0025] The beneficial effects of the above technical solution are as follows: the reinforcing ribs and supporting legs form a stable spatial truss structure, which maintains overall rigidity while reducing the thickness of the plate and reducing the amount of material used; the bolted connection allows installation and maintenance to be completed quickly on the construction site without welding.

[0026] As a further improvement to the above solution, the reinforcing rib includes a horizontal bar with downwardly inclined diagonal bars at both ends and a vertical bar at the end of the diagonal bar; the length of the horizontal bar is less than the width of the base plate; the vertical bar and the diagonal bar constitute the support foot.

[0027] The beneficial effects of the above technical solution are as follows: the combination of diagonal and vertical bars transforms the lateral load into vertical support force, further reducing the mid-span deflection of the base plate; the length of the horizontal bar is less than the width of the base plate, which facilitates the horizontal bar supporting the base plate.

[0028] As a further improvement to the above solution, a sealant layer is provided at the connection between adjacent base plates.

[0029] The beneficial effects of the above technical solution are: the sealant layer fills the micro gaps of the Z-shaped bonding surface, forming a second sealing barrier, which can maintain water tightness even when extreme temperature differences cause material micro-movement.

[0030] As a further improvement to the above solution, the sealant layer is butyl tape or polyurethane adhesive layer.

[0031] The beneficial effects of the above technical solutions are as follows: butyl tape or polyurethane adhesive has excellent water resistance, weather resistance and chemical corrosion resistance, and can maintain elasticity in the long-term humid and hot environment of the cooling tower, reducing the frequency and cost of later maintenance.

[0032] Compared with the prior art, the present invention has the following overall advantages: through the composite sealing structure of Z-shaped multi-layer bending and sealing adhesive layer, the water collection basin's leak-proof capability is improved several times; the number of bolts is reduced by about 30% to 50%, and the assembly time is shortened by more than 20%; the welding process is eliminated, thus eliminating welding deformation and subsequent corrosion pollution; the overall weight is reduced by about 10%, and material and manufacturing costs decrease simultaneously, achieving the comprehensive advantages of high sealing, low cost, lightweight, and easy maintenance. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the cooling tower's water collection basin structure.

[0034] Figure 2 This is a schematic diagram of the bottom structure of an existing cooling tower water collection basin.

[0035] Figure 3 This is a schematic diagram of the bottom structure of the water collection basin of this utility model.

[0036] Figure 4 for Figure 3 A magnified schematic diagram of part A in the middle.

[0037] Figure 5 This is a schematic diagram of the reinforcing rib structure.

[0038] In the diagram: 1. Base plate; 2. Support plate; 3. Reinforcing rod; 4. Reinforcing rib; 11. Groove; 12. Raised strip; 41. Horizontal bar; 42. Diagonal bar; 43. Vertical bar. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to the embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0040] Product Structure Overview

[0041] like Figures 3-5 As shown, the water collection basin in this embodiment is composed of several rectangular base plates 1 spliced ​​together. The base plates 1 are made of 2mm thick galvanized steel plates. The base plates 1 are first bent downwards at a 90° angle using a CNC bending machine, with a bending height h = 30 mm, forming a continuous folded edge. The folded edge is then bent a second time to form a Z-shaped cross-section (see details). Figure 4 (Partial magnification).

[0042] Z-shaped multi-layer sealing interface

[0043] (1) Groove 11: On one side of the base plate 1, a strip groove 11 with an isosceles triangle cross section is formed by bending it inward again.

[0044] (2) Protrusion 12: A triangular protrusion 12 matching the groove 11 is formed by Z-shaped bending on the opposite side of the base plate 1.

[0045] (3) Splicing relationship: The adjacent bottom plates 1 are three-dimensionally positioned by embedding the protrusion 12 into the groove 11; the interference of the protrusion 12 and the groove 11 is 0.1–0.2 mm, forming the first tortuous sealing path, whose equivalent water seepage path length is about 4.7 times longer than that of the traditional right-angle side.

[0046] Bolted connection and second seal

[0047] (1) Bolt specifications: M6×25 stainless steel hex bolts with EPDM washers.

[0048] (2) Hole layout principle: The holes are evenly distributed along the length of the folded edge, with a hole spacing of p = 120 mm, which reduces the number of bolts by about 40% compared to the traditional structure.

[0049] (3) Sealing layer: Butyl tape is pre-applied on the folded edge and inside the groove 11 to form a second sealing barrier; the butyl tape can fill the micro gaps and prevent capillary leakage.

[0050] Support system

[0051] (1) Support plate 2: Welded to the lower end of one side of the bottom plate 1, used to disperse concentrated loads to the main beam of the cooling tower.

[0052] (2) Reinforcing rib 4: The overall shape is "U" ( Figure 5 ), including a cross bar 41 (the length is smaller than the width of the bottom plate 1), an inclined bar 42 (the included angle with the horizontal plane is 60°), and a vertical bar 43. Installation holes are opened on the side of the vertical bar 43 and connected to the support plate 2 through bolts to form a space truss, improving the overall stiffness.

[0053] Assembly process

[0054] Step A: Place the bottom plates 1 in order of number, ensuring that the grooves 11 are aligned with the ridges 12;

[0055] Step B: Stick butyl tape on the folded edges and in the grooves 11, and use a fixture to keep the gap between adjacent bottom plates 1 ≤ 0.1 mm;

[0056] Step C: Insert bolts and pre-tighten them crosswise. The pre-tightening torque is applied in two steps: the first time is 10 N·m, and the second time is 18 N·m;

[0057] Step D: Hoist the reinforcing rib 4 under the bottom plate 1, align it with the installation holes of the support plate 2, and complete the bolt tightening at one time;

[0058] Step E: Fill the whole with water to the designed water level, keep the pressure for 30 min, and it is qualified if there is no leakage point after visual inspection.

[0059] It should be noted that in this article, the terms: including, containing and any other variants are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device. Specific examples are used in this article to elaborate on the principle and implementation mode of the technical solution of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention. The above is only the preferred implementation mode of the present invention. It should be pointed out that due to the limited nature of literal expression and objectively infinite specific structures, for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements, retouches or changes can be made, or the above technical features can be combined in an appropriate way; these improvements, retouches, changes or combinations, or directly applying the concept and technical solution of the present invention to other occasions without improvement, should all be regarded as the protection scope of the present invention.

Claims

1. A multi-layer sealed leak-proof water collection basin for a cooling tower, comprising a bottom surface of the water collection basin composed of multiple base plates (1) assembled together; each base plate (1) has four sides bent downwards to form folded edges; adjacent base plates (1) are connected and fixed to each other by bolts on the folded edges; characterized in that: On one side of the base plate (1), a recessed strip groove (11) is formed by Z-shaped bending, and on the opposite side of the base plate (1), a protruding strip (12) is formed by Z-shaped bending; adjacent base plates (1) are joined together by the groove (11) and the protrusion.

2. The water collection basin according to claim 1, characterized in that: The protruding strip (12) is formed by bending the edge in a Z-shape to form an outward protruding triangular structure; the groove (11) is formed by bending the edge in a Z-shape to form an inward concave triangular groove (11) structure.

3. The water collection basin according to claim 1, characterized in that: A support plate (2) is provided on one side of the bottom of the base plate (1).

4. The water collection basin according to claim 3, characterized in that, The bottom plate (1) is provided with a reinforcing rib (4) placed horizontally below it; the two ends of the reinforcing rib (4) are provided with downward supporting feet; the supporting feet are provided with mounting holes; the mounting holes are connected to the support plate (2) by bolts.

5. The water collection basin according to claim 4, characterized in that, The reinforcing rib (4) includes a horizontal bar (41), with downwardly inclined diagonal bars (42) at both ends of the horizontal bar (41) and a vertical bar (43) at the end of the diagonal bar (42); the length of the horizontal bar (41) is less than the width of the base plate (1); the vertical bar (43) and the diagonal bar (42) constitute the support foot.

6. The water collection basin according to claim 1, characterized in that, A sealant layer is provided at the connection between adjacent base plates (1).

7. The water collection basin according to claim 1, characterized in that, The sealant layer is butyl tape or polyurethane adhesive layer.

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