A floating overflow prevention device for a cooling tower and a water collecting tray having the device

Abstract

The present invention discloses a floating overflow prevention device for a cooling tower. Above the fence base, there is a lightweight floating frame that can float on the water surface when encountering water; when the water surface is flush with the bottom surface of the floating frame, the bottom surface of the floating frame is in contact with the water surface; between the upper and lower corresponding frame edges of the fence base and the floating frame, they are connected by a telescopic water-proof cloth that surrounds the center of the floating frame in a circle; at the four corners on the outside of the telescopic water-proof cloth, there are cloth strip stretching components for bearing the water pressure inside the telescopic water-proof cloth; the top end of the telescopic water-proof cloth is adhered to the movable end of the cloth strip stretching component; and the top end of the telescopic water-proof cloth moves along the height direction of the cloth strip stretching component. In the present invention, it can prevent the overflow water from corroding the bearing platform, keep the bearing platform dry, and improve the protection effect on the bearing platform; weaken the overflow phenomenon caused by the non-levelness of the bearing platform; the structure is simple, and the overflow prevention operation is simple and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling tower anti-overflow, and specifically to a floating cooling tower anti-overflow device and a water collecting tray with the device. Background Art

[0002] The operation of a chiller is inseparable from the cooling water circulation. The heat dissipation equipment for the cooling water circulation is a cooling tower. The important components of the cooling tower include a cooling fan, a guide air duct, a water collecting tray below, an overflow pipe, etc. In actual use, the cooling tower needs to be placed on a bearing platform. During the use of the cooling tower, the water level in the water collecting tray is controlled by a float valve.

[0003] Due to the very limited control accuracy of the float valve, and in addition, the cooling tower base is installed on a bearing platform, such as a roof, etc., it is very difficult to strictly adjust the level. During operation, it often occurs that when the cooling tower stops running, water overflows along the overflow hole, or even overflows along the outer edge of the water collecting tray.

[0004] Such long-term "dripping water" is likely to accelerate the corrosion of the bearing platform. The conventional method to solve this overflow is to adjust the float ball to lower the water level in the water collecting tray, but this method will affect the heat exchange efficiency of the tower, and the adjustment difficulty is huge. Moreover, it is easy to cause the phenomenon of pump cavitation during the operation of the cooling water circulation, accelerating the damage of the pump impeller. And the bottom of the cooling tower is in a humid environment for a long time, which is easy to accelerate the damage of the bearing platform.

[0005] The patent document with the publication number CN209802181U discloses a cooling tower anti-overflow water distribution device. Specifically, by providing an anti-overflow device, when the water at the upper end of the water inlet enters the valve body through the damping hole, when the water pressure continuously increases and the water pressure is greater than the elastic potential energy on the second spring, it will push the pilot valve core and the second spring to drive to the right end, so that the pilot valve core releases the lock on the upper right end of the valve body, making the pressure in the upper chamber become 0. Since the pressure in the upper chamber is 0, the main valve core is pushed upward by the water, so that the water inlet and the drain port are conducted, thereby draining water to balance the water pressure.

[0006] However, the anti-overflow device of this patent document has a complex structure, is troublesome to manufacture, and the anti-overflow process is complex. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a floating cooling tower anti-overflow device and a water collecting tray with the device that can prevent the overflow water from corroding the bearing platform without affecting the heat exchange efficiency.

[0008] To solve the above technical problems, the present invention provides the following technical solution: a floating cooling tower anti-overflow device, comprising a fence base, a floating frame, a telescopic water-proof cloth and a cloth strip stretching component; a lightweight floating frame that can float on the water surface when encountering water is arranged above the fence base; and when the water surface is flush with the bottom surface of the floating frame, the bottom surface of the floating frame contacts the water surface; the fence base and the frame edges of the floating frame corresponding to each other up and down are connected by a telescopic water-proof cloth that surrounds the center of the floating frame in a circle; cloth strip stretching components for bearing the water pressure inside the telescopic water-proof cloth are arranged at the four corners outside the telescopic water-proof cloth; the top end of the telescopic water-proof cloth is adhered to the movable end of the cloth strip stretching component; and the top end of the telescopic water-proof cloth moves along the height direction of the cloth strip stretching component.

[0009] The height of the top end of the telescopic water-proof cloth rises as the liquid level rises, stops when it stops, and drops when it drops, preventing the occurrence of overflow phenomena; preventing the water from overflowing from corroding the bearing platform, keeping the bearing platform dry, and improving the protection effect on the bearing platform; the floating frame floats on the liquid surface, weakening the overflow phenomenon caused by the non-levelness of the bearing platform; moreover, compared with the traditional floating ball adjustment method, the structure of this floating cooling tower anti-overflow device is obviously simpler, the anti-overflow operation and process are simple and reliable, the liquid surface contacts the bottom surface of the floating frame, and there is no need to lower the liquid level of the water collecting tray; moreover, the hot return water after cooling the equipment falls from the upper part of the cooling tower along both sides of the tower. At the same time, under the suction effect of the top fan, the high-speed air flow horizontally passes through the falling water curtain, cooling the hot return water once; the water cooled once falls into the water collecting tray and is mixed with the water stored in the water collecting tray, which can achieve secondary cooling. The more water stored in the water collecting tray during the operation process, the higher the secondary cooling efficiency. The improved water collecting tray retains the excess water flowing back from the cooling tower. The total amount of water in the water collecting tray increases with the remaining water in the water collecting tray plus the excess water flowing back, and the cooling efficiency is high, thus not affecting the heat exchange efficiency of the cooling tower.

[0010] Preferably, the cloth strip stretching component includes a structural guide rod and a guide rod sliding sleeve; the bottom end of the structural guide rod is vertically welded to the top surface of the fence base; a plurality of guide rod sliding sleeves are sleeved on the rod body of the structural guide rod; and the guide rod sliding sleeves slide up and down along the rod body of the structural guide rod; each guide rod sliding sleeve is adhesively fixed to the cloth surface of the telescopic water-proof cloth; and when the telescopic water-proof cloth is straightened, the distances between adjacent guide rod sliding sleeves are equal.

[0011] Fix the fence base to the bottom of the water collecting tray in the middle of the cooling tower by bolts, buckles or welding. Then, under the action of gravity, the floating frame makes the telescopic water-proof cloth wrinkle. The water level in the water collecting tray of the cooling tower slowly rises. When the liquid level contacts the bottom surface of the floating frame, it drives the floating frame to rise. The floating frame drives the telescopic water-proof cloth to rise and gradually straighten, and the guide rod sleeve connected to the telescopic water-proof cloth slides upward on the structural guide rod. This can prevent the overflow water from corroding the bearing platform, keep the bearing platform dry, and improve the protection effect on the bearing platform. The floating frame floats on the liquid surface, weakening the overflow phenomenon caused by the unevenness of the bearing platform. Moreover, compared with the traditional floating ball adjustment method, the floating type anti-overflow device of the cooling tower has a simpler structure, and the anti-overflow operation and process are simple and reliable. At the same time, it does not affect the heat exchange efficiency of the cooling tower.

[0012] Preferably, the cloth strip stretching assembly includes a bottom cylinder, a first limiting ring, a first sliding cylinder, a second limiting ring, a second sliding cylinder, a third limiting ring, a third sliding cylinder and a top connecting block. There are four bottom cylinders, which are respectively arranged at the four corners of the top surface of the fence base. And the bottom cylinders are arranged outside the telescopic water-proof cloth. The top of the bottom cylinder is welded with a first limiting ring. A first sliding cylinder that can slide up and down in the bottom cylinder is sleeved inside the bottom cylinder. The bottom of the first sliding cylinder is welded with a first limiting block that blocks the first limiting ring. The top of the first sliding cylinder is welded with a second limiting ring. A second sliding cylinder that can slide up and down in the first sliding cylinder is sleeved inside the first sliding cylinder. The bottom of the second sliding cylinder is welded with a second limiting block that is stuck with the second limiting ring. The top of the second sliding cylinder is welded with a third limiting block. A third sliding cylinder that can slide up and down in the second sliding cylinder is sleeved inside the second sliding cylinder. The bottom of the third sliding cylinder is welded with a third limiting block that is stuck with the third limiting ring. The top of the third sliding cylinder is welded with a top connecting block.

[0013] Preferably, the top connecting block is adhesively connected to the top end of the telescopic water-proof cloth by glue. And the outer ends of the first limiting ring, the second limiting ring and the third limiting ring are adhesively connected to the outer surface of the telescopic water-proof cloth by glue.

[0014] Preferably, the first sliding cylinder, the second sliding cylinder and the third sliding cylinder have the same height, which can ensure the lowest height when the telescopic water-proof cloth is folded.

[0015] The height of the floating frame slowly rises, driving the height of the top of the telescopic water-proof cloth to rise. Moreover, the top connecting block outside the telescopic water-proof cloth rises, pulling out the third sliding cylinder from the second sliding cylinder. After the third limiting block reaches the third limiting ring, under the interaction of the third limiting block and the third limiting ring, the second sliding cylinder is pulled out from the first sliding cylinder. Similarly, the first sliding cylinder is pulled out from the bottom cylinder, and the telescopic water-proof cloth is straightened. The height of the top of the telescopic water-proof cloth rises when the liquid level rises, stops when it stops, and drops when it drops, preventing overflow. When the liquid level is the lowest, multiple sliding cylinders are stacked, keeping the overall height of the device the lowest and occupying little space.

[0016] Preferably, the lower edge and the upper edge of the telescopic water-proof cloth are adhesively bonded to the fence base and the frame edge of the floating frame respectively by glue.

[0017] Preferably, the floating frame is a square frame structure surrounded by floating logs. This improves the floating effect of the floating frame and facilitates straightening the telescopic water-proof cloth when the water level on the water surface rises.

[0018] Preferably, the fence base and the floating frame are connected by a double-layer telescopic water-proof cloth. This improves the waterproof and isolation effect.

[0019] A water collecting tray with a floating cooling tower anti-overflow device includes a water collecting tray body; fixed on the four edges of the plate surface of the water collecting tray body are weirs with a fixed height; the bottom end surface of the fence base is welded to the upper edge of the weir.

[0020] After the water level exceeds the height of the weir, the liquid level contacts the bottom surface of the floating frame, pushing the floating frame to rise, and then straightening the telescopic water-proof cloth. By directly adding a floating cooling tower anti-overflow device to the original structure, there is no need for demolition or replacement operations, which is convenient for low-cost transformation.

[0021] Preferably, the fence base is directly welded to the four edges of the plate surface of the water collecting tray body.

[0022] It replaces the original weir structure, which can not only reduce material consumption, but also, when there is water in the water collecting tray body, timely feedback the amount of water through the height of the telescopic water-proof cloth.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] A. The top height of the telescopic water barrier rises as the liquid level rises, stops when the liquid level stops, and drops when the liquid level drops, preventing overflow; preventing the overflow water from corroding the bearing platform, keeping the bearing platform dry, and improving the protection effect on the bearing platform; the floating frame floats on the liquid surface, weakening the overflow phenomenon caused by the unevenness of the bearing platform; moreover, compared with the traditional floating ball adjustment method, the anti-overflow device of the floating cooling tower has a simpler structure, and the anti-overflow operation and process are simple and reliable; furthermore, the hot return water after cooling the equipment falls from the upper part of the cooling tower along both sides of the tower. At the same time, under the suction effect of the top fan, the high-speed air flow horizontally passes through the falling water curtain, cooling the hot return water once; the water cooled once falls into the water collecting tray and is mixed with the water accumulated in the water collecting tray, achieving secondary cooling. The more water accumulated in the water collecting tray during operation, the higher the secondary cooling efficiency. The improved water collecting tray retains the excess water flowing back from the cooling tower. The total amount of water in the water collecting tray increases with the remaining water in the water collecting tray plus the excess water flowing back, and the cooling efficiency is high;

[0025] B. When the liquid level is at its lowest, multiple sliding cylinders are stacked, keeping the overall height of the device at its lowest and occupying less space;

[0026] The first sliding cylinder, the second sliding cylinder and the third sliding cylinder have the same height, ensuring the lowest height when the telescopic water barrier is folded;

[0027] The floating frame is a square frame structure made of floating wood, improving the floating effect of the floating frame and facilitating the straightening of the telescopic water barrier when the water level on the water surface rises;

[0028] The fence base and the floating frame are connected by a double-layer telescopic water barrier, improving the waterproof isolation effect;

[0029] The bottom end face of the fence base is welded to the upper edge of the cofferdam. After the water level exceeds the height of the cofferdam, the liquid surface contacts the bottom surface of the floating frame, pushing the floating frame to rise, and then straightening the telescopic water barrier. Adding the anti-overflow device of the floating cooling tower directly on the original structure without the need for demolition or replacement operations, facilitating low-cost transformation;

[0030] The fence base is directly welded to the four sides of the plate surface of the water collecting tray body, replacing the original cofferdam structure. It can not only reduce material consumption, but also timely feedback the amount of water through the height of the telescopic water barrier when there is water in the water collecting tray body. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the anti-overflow device of the floating cooling tower in Embodiment 1 of the present invention;

[0032] Figure 2 For the present invention Figure 1 The enlarged view of the structure in Area A;

[0033] Figure 3 This is the front view structural schematic diagram of the cloth strip stretching component in the first embodiment of the present invention;

[0034] Figure 4 This is the three-dimensional view of the floating frame in the first embodiment of the present invention;

[0035] Figure 5 This is the working state schematic diagram of the anti-overflow device of the floating cooling tower in the first embodiment of the present invention;

[0036] Figure 6 This is the cloth strip stretching component in the second embodiment of the present invention;

[0037] Figure 7 This is the three-dimensional structural schematic diagram of the water collecting tray with the anti-overflow device of the floating cooling tower in the fifth embodiment of the present invention;

[0038] Figure 8 This is the three-dimensional structural schematic diagram of the water collecting tray with the anti-overflow device of the floating cooling tower in the sixth embodiment of the present invention.

[0039] Reference numerals in the drawings: 1, fence base; 2, floating frame; 3, telescopic water-proof cloth; 4, cloth strip stretching component; 401, structural guide rod; 402, guide rod sliding sleeve; 403, top connection block; 404, bottom cylinder; 405, first limit ring; 406, first sliding cylinder; 407, second limit ring; 408, second sliding cylinder; 409, third limit ring; 410, third sliding cylinder; 5, water collecting tray body; 51, cofferdam. Detailed implementation manners

[0040] For the convenience of those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention will be further described below with reference to the accompanying drawings of the specification.

[0041] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0042] Embodiment 1

[0043] Refer to Figure 1 , this embodiment discloses an anti-overflow device for a floating cooling tower, including a fence base 1, a floating frame 2, a telescopic water-proof cloth 3 and a cloth strip stretching component 4.

[0044] The fence base 1 is a "mouth"-shaped structure formed by four square pipes. The fence base 1 is fixed to the bottom of the middle water collecting tray in the cooling tower by bolts or buckles or welding. A floating frame 2 is arranged above the fence base 1.

[0045] Refer to Figure 4 , the floating frame 2 is a "mouth"-shaped structure formed by four round pipes. The overall length and width of the floating frame 2 are slightly smaller than the overall length and width of the fence base 1. The floating frame 2 is a lightweight structure that can float on the water surface when encountering water. When the water surface is flush with the bottom surface of the floating frame 2, the bottom surface of the floating frame 2 contacts the water surface. The fence base 1 and the frame edges of the floating frame 2 corresponding to each other up and down are connected by a telescopic water-proof cloth 3 that surrounds a circle around the center of the floating frame 2.

[0046] The lower edge and the upper edge of the telescopic water-proof cloth 3 are adhesively bonded to the frame edges of the fence base 1 and the floating frame 2 respectively by glue.

[0047] Refer to Figure 2 , the top height of the telescopic water-proof cloth 3 exceeds the top surface height of the floating frame 2 by 1-2 mm.

[0048] The inside of the floating frame 2 is hollow.

[0049] The length and width of the floating frame 2 are preferably reduced to 0.9 times that of the fence base 1 in equal proportion.

[0050] Refer to Figure 3 , the cloth strip stretching assembly 4 includes a structural guide rod 401 and a guide rod sliding sleeve 402. The bottom end of the structural guide rod 401 is vertically welded to the top surface of the fence base 1. A plurality of guide rod sliding sleeves 402 are sleeved on the rod body of the structural guide rod 401. And the guide rod sliding sleeves 402 slide up and down along the rod body of the structural guide rod 401. Each guide rod sliding sleeve 402 is adhesively fixed to the cloth surface of the telescopic water-proof cloth 3. And when the telescopic water-proof cloth 3 is straightened, the distance between adjacent guide rod sliding sleeves 402 is equal.

[0051] The working principle of this embodiment is: Refer to Figure 5, fix the fence base 1 to the bottom of the water collecting tray in the cooling tower by bolts, buckles or welding. Then, under the action of gravity, the floating frame 2 makes the telescopic water-proof cloth 3 fold. The water level in the water collecting tray of the cooling tower rises slowly. When the liquid surface contacts the bottom surface of the floating frame 2, it drives the floating frame 2 to rise. The floating frame 2 drives the telescopic water-proof cloth 3 to rise and gradually straighten, and the guide rod sleeve 402 connected to the telescopic water-proof cloth 3 slides upward on the structural guide rod 401; prevent the overflow water from corroding the bearing platform, keep the bearing platform dry, and improve the protection effect on the bearing platform; the floating frame 2 floats on the liquid surface, weakening the overflow phenomenon caused by the non-levelness of the bearing platform; moreover, compared with the traditional floating ball adjustment method, the floating cooling tower anti-overflow device has a simpler structure, and the anti-overflow operation and process are simple and reliable; moreover, the hot return water after cooling the equipment falls from the upper part of the cooling tower along both sides of the tower. At the same time, under the suction effect of the top fan, the high-speed air flow horizontally passes through the falling water curtain, cooling the hot return water once; the water cooled once falls into the water collecting tray and is mixed with the water accumulated in the water collecting tray, and can achieve secondary cooling. The more water accumulated in the water collecting tray during operation, the higher the secondary cooling efficiency. The improved water collecting tray retains the excess water flowing back from the cooling tower. The sum of the remaining water in the water collecting tray and the excess water flowing back increases the total amount of water in the water collecting tray, and the cooling efficiency is high.

[0052] Embodiment 2

[0053] Refer to Figure 6 , the difference between this Embodiment 2 and Embodiment 1 is that the cloth stretching assembly 4 includes a bottom cylinder 404, a first limit ring 405, a first sliding cylinder 406, a second limit ring 407, a second sliding cylinder 408, a third limit ring 409, a third sliding cylinder 410 and a top connection block 403. The number of the bottom cylinders 404 is four, and they are respectively arranged at the four corners of the top surface of the fence base 1. And the bottom cylinder 404 is arranged outside the telescopic water-proof cloth 3.

[0054] The top of the bottom cylinder 404 is welded with a first limit ring 405. A first sliding cylinder 406 that can slide up and down in the bottom cylinder 404 is sleeved inside the bottom cylinder 404. The bottom of the first sliding cylinder 406 is welded with a first limit block (not shown in the figure) that blocks against the first limit ring 405.

[0055] The top of the first sliding cylinder 406 is welded with a second limit ring 407. A second sliding cylinder 408 that can slide up and down in the first sliding cylinder 406 is sleeved inside the first sliding cylinder 406. The bottom of the second sliding cylinder 408 is welded with a second limit block (not shown in the figure) that is stuck with the second limit ring 407.

[0056] Similarly, a third limiting ring 409 is welded to the top of the second sliding cylinder 408. A third sliding cylinder 410 that can slide up and down within the second sliding cylinder 408 is sleeved inside the second sliding cylinder 408. A third limiting block (not shown in the figure) that engages with the third limiting ring 409 is welded to the bottom of the third sliding cylinder 410.

[0057] In addition, a top connection block 403 is welded to the top of the third sliding cylinder 410.

[0058] The top connection block 403 is adhesively bonded to the top end of the telescopic waterproof cloth 3 with glue. Moreover, the outer ends of the first limiting ring 405, the second limiting ring 407, and the third limiting ring 409 are adhesively bonded to the outer surface of the telescopic waterproof cloth 3 with glue.

[0059] The positions of the first limiting ring 405, the second limiting ring 407, and the third limiting ring 409 are respectively at the 3 / 30, 11 / 30, and 21 / 30 heights of the outer surface of the telescopic waterproof cloth 3 after it is straightened.

[0060] The first sliding cylinder 406, the second sliding cylinder 408, and the third sliding cylinder 410 have the same height, ensuring the lowest height of the telescopic waterproof cloth 3 when it is folded.

[0061] The height of the floating frame 2 slowly rises, driving the height of the top end of the telescopic waterproof cloth 3 to rise. Moreover, the top connection block 403 on the outside of the telescopic waterproof cloth 3 rises, pulling out the third sliding cylinder 410 from the second sliding cylinder 408. After the third limiting block reaches the third limiting ring 409, under the interaction of the third limiting block and the third limiting ring 409, the second sliding cylinder 408 is pulled out from the first sliding cylinder 406. Similarly, the first sliding cylinder 406 is pulled out from the bottom cylinder 404, and the telescopic waterproof cloth 3 is straightened. The height of the top end of the telescopic waterproof cloth 3 rises as the liquid level rises, stops when the liquid level stops, and drops when the liquid level drops, preventing overflow. When the liquid level is at its lowest, multiple sliding cylinders are stacked, keeping the overall height of the device at its lowest and occupying little space.

[0062] Embodiment Three

[0063] The floating frame 2 is a square frame structure made of floating wood, improving the floating effect of the floating frame 2 and facilitating the straightening of the telescopic waterproof cloth 3 when the water level on the water surface rises.

[0064] Embodiment Four

[0065] The fence base 1 and the floating frame 2 are connected by a double-layer telescopic waterproof cloth 3, improving the waterproof and isolation effect.

[0066] Embodiment Five

[0067] Refer to Figure 7, a water collecting tray with a floating cooling tower anti-overflow device; it includes a water collecting tray body 5; on the four edges of the plate surface of the water collecting tray body 5, there are fixed retaining walls 51 with a fixed height. The bottom end surface of the fence base 1 is welded to the upper edge of the retaining wall 51.

[0068] After the water level exceeds the height of the retaining wall 51, the liquid surface contacts the bottom surface of the floating frame 2, pushing the floating frame 2 to rise, and then straightening the telescopic water-proof cloth 3. A floating cooling tower anti-overflow device is directly added to the original structure without the need for demolition or replacement operations, which is convenient for low-cost transformation.

[0069] Embodiment Six

[0070] Refer to Figure 8 , the difference between this Embodiment Six and Embodiment Five is that the fence base 1 is directly welded to the four sides of the plate surface of the cooling tower water collecting tray body 5.

[0071] It replaces the original retaining wall 51 structure, which can not only reduce material consumption, but also, when there is water in the water collecting tray body 5, timely feedback the amount of water through the height of the telescopic water-proof cloth 3.

[0072] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any reference signs in the claims should not be regarded as limiting the claimed claims.

[0073] The above-mentioned embodiments only represent the implementation manners of the invention. The protection scope of the present invention is not limited to the above-mentioned embodiments only. For those skilled in the art, without departing from the concept of the present invention, several deformations and improvements can be made, and these all belong to the protection scope of the present invention.

Claims

1. A floating cooling tower anti-overflow device, characterized in that: It includes a fence base, a floating frame, a telescopic water-proof cloth and a cloth strip stretching component; a lightweight floating frame that can float on the water surface when encountering water is arranged above the fence base; and when the water surface is flush with the bottom surface of the floating frame, the bottom surface of the floating frame contacts the water surface; the fence base and the frame edges of the floating frame corresponding to each other up and down are connected by a telescopic water-proof cloth that surrounds the center of the floating frame in a circle; cloth strip stretching components for bearing the lateral water pressure inside the telescopic water-proof cloth are arranged at the four corners outside the telescopic water-proof cloth; the top end of the telescopic water-proof cloth is adhered to the movable end of the cloth strip stretching component; and the top end of the telescopic water-proof cloth moves along the height direction of the cloth strip stretching component.

2. The floating cooling tower anti-overflow device according to claim 1, wherein: The cloth strip stretching component includes a structural guide rod and a guide rod sliding sleeve; the bottom end of the structural guide rod is vertically fixed on the top surface of the fence base; a plurality of guide rod sliding sleeves are sleeved outside the rod body of the structural guide rod; and the guide rod sliding sleeves slide up and down along the rod body of the structural guide rod; each guide rod sliding sleeve is adhesively fixed to the cloth surface of the telescopic water-proof cloth; and when the telescopic water-proof cloth is straightened, the distances between adjacent guide rod sliding sleeves are equal.

3. The floating cooling tower anti-overflow device according to claim 1, characterized in that: The cloth strip stretching component includes a bottom cylinder, a first limiting ring, a first sliding cylinder, a second limiting ring, a second sliding cylinder, a third limiting ring, a third sliding cylinder and a top connecting block; the number of the bottom cylinders is four, and they are respectively arranged at the four corners of the top surface of the fence base; and the bottom cylinders are arranged outside the telescopic water-proof cloth; the first limiting ring is welded to the top of the bottom cylinder; a first sliding cylinder that can slide up and down in the bottom cylinder is sleeved inside the bottom cylinder; a first limiting block that blocks against the first limiting ring is welded to the bottom of the first sliding cylinder; the second limiting ring is welded to the top of the first sliding cylinder; a second sliding cylinder that can slide up and down in the first sliding cylinder is sleeved inside the first sliding cylinder; a second limiting block that is stuck with the second limiting ring is welded to the bottom of the second sliding cylinder; a third limiting block is welded to the top of the second sliding cylinder; a third sliding cylinder that can slide up and down in the second sliding cylinder is sleeved inside the second sliding cylinder; a third limiting block that is stuck with the third limiting ring is welded to the bottom of the third sliding cylinder; the top connecting block is welded to the top of the third sliding cylinder.

4. The floating cooling tower anti-overflow device according to claim 3, wherein: The top connecting block is adhesively connected to the top end of the telescopic water-proof cloth with glue; and the outer ends of the first limiting ring, the second limiting ring and the third limiting ring are adhesively connected to the outer surface of the telescopic water-proof cloth with glue.

5. The floating cooling tower anti-overflow device according to claim 3, characterized in that: The first sliding cylinder, the second sliding cylinder and the third sliding cylinder have the same height.

6. The floating cooling tower anti-overflow device according to claim 1, characterized in that: The lower edge and the upper edge of the telescopic water-proof cloth are adhesively connected to the frame edges of the fence base and the floating frame respectively with glue.

7. A floating cooling tower anti-overflow device according to claim 1, characterized in that: The fence base is a "mouth"-shaped structure formed by four square pipes.

8. The floating cooling tower anti-overflow device according to claim 1, characterized in that: The fence base and the floating frame are connected by a double-layer telescopic water-proof cloth.

9. The water collecting tray with a floating cooling tower anti-overflow device as described in claim 1, characterized in that: It includes a water collecting tray body; retaining walls with fixed heights are fixed on the four edges of the plate surface of the water collecting tray body; the bottom end surface of the fence base is welded to the upper edge of the retaining wall.

10. The water collecting tray with a floating cooling tower anti-overflow device according to claim 1, characterized in that: It includes a water collecting tray body; the fence base is directly welded to the four sides of the plate surface of the water collecting tray body.

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