Waterproof enclosure structure for engineering construction
By adopting the design of sliding connection and telescopic mechanisms in the waterproof fence structure in the engineering construction, the problem of difficulty in taking into account the flexibility and waterproof performance of the fence structure in the prior art is solved, and flexible adjustment of the fence length and improvement of the overall waterproof performance are achieved.
Patent Information
- Application Number
- CN202421482185.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The existing engineering construction waterproof fence structure is difficult to take into account both flexibility and waterproof performance. The fixed fence structure has a fixed length and is not easy to adjust, while the movable fence structure has poor waterproof performance.
The structural design includes a central base, a central fence column, a variable distance base, a side base, a variable distance support fence, a side fence column, a telescopic water barrier cloth and a lifting and sealing water barrier assembly. The flexible adjustment of the fence length is achieved through sliding connection and telescopic mechanism, and the overall water barrier performance is improved through sealing strips and rubber sealing strips.
It realizes flexible adjustment of the fence structure to adapt to the needs of different construction sites, and at the same time significantly improves the overall waterproof performance to ensure the safety and order of the construction site.
Smart Images

Figure CN222716615U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of waterproof enclosures, and in particular to waterproof enclosure structures for engineering construction. Background Art
[0002] In the field of engineering construction, enclosure structures are important facilities to ensure the safety of construction sites and maintain construction order. With the acceleration of urbanization and the continuous advancement of infrastructure construction, the requirements for construction enclosure structures are also increasing.
[0003] In the prior art, construction enclosure structures are mainly divided into two types: fixed and movable. Fixed enclosure structures are usually built with materials such as concrete and masonry, and have good compression resistance and stability, but the length is fixed, difficult to adjust, and lack flexibility. Movable enclosure structures such as metal plates and plastic plates often have problems such as poor water-retaining performance and insufficient structural stability. At the same time, the length of the movable enclosure structure itself is fixed and generally cannot fully adapt to the required length of the project. However, directly stacking concrete and masonry enclosures will lead to difficulties in dismantling, while movable enclosures can ensure that the enclosure can play a good waterproof role.
[0004] In the process of implementing this application, the inventors found that there are at least the following problems in this technology: the existing fixed engineering construction waterproof fence cannot meet the flexibility requirements of the fence itself, and the movable engineering construction waterproof fence has poor waterproof performance and cannot take into account both flexibility and waterproof performance. Therefore, a construction waterproof fence structure is now proposed. Utility Model Content
[0005] In order to improve the problem that the existing fixed engineering construction waterproof fence cannot meet the flexibility requirements of the fence itself, the movable engineering construction waterproof fence has poor waterproof performance and cannot take into account both flexibility and waterproof performance, this application provides an engineering construction waterproof fence structure.
[0006] This application provides a waterproof enclosure structure for engineering construction, using the following technical solutions:
[0007] The waterproof enclosure structure for engineering construction comprises a central base bolt and a central enclosure column installed on the central base, wherein both ends of the central base are slidably connected to a variable-pitch base, and one end of the variable-pitch base away from the central base is slidably connected to a side base;
[0008] The centers of both sides of the outer walls of the central enclosure column are fixedly connected with variable-distance support fences, and the ends of the variable-distance support fences away from the central enclosure column are fixedly connected with side enclosure columns. A telescopic water-retaining cloth is arranged between the central enclosure column and the side enclosure column. The bottom ends of the outer walls of the central enclosure column and the side enclosure column are slidably connected with a lifting and closing water-retaining assembly, and grooves are provided on the upper surfaces of the central base and the side base near both sides of the lifting and closing water-retaining assembly.
[0009] Optionally, the lifting closed water-retaining assembly includes a central sliding block slidably connected to both sides of the outer wall of the central enclosure column and side sliding blocks slidably connected to the side enclosure columns, a telescopic sealing strip slidably connected to both the central sliding block and the side sliding blocks is arranged between the central sliding block and the side sliding blocks, the bottom of the central sliding block and the side sliding block are fixedly connected to a first sealing strip, the bottom of the telescopic sealing strip is fixedly connected to a second sealing strip, the bottoms of the first sealing strip and the second sealing strip are both fixedly connected to rubber sealing strips, the side enclosure columns and the outer walls of the central enclosure columns are fixedly connected to connecting blocks on both sides, the connecting blocks are internally threaded with sealing bolts, and the bottom ends of the sealing bolts are rotatably connected to the side sliding blocks and the central sliding block.
[0010] Optionally, a through hole is provided at the center of the upper surface of the side enclosure column and at both sides of the upper surface of the center enclosure column, and mounting bolts are inserted into the through holes. Threaded holes matching the mounting bolts are provided on the upper surfaces of the center base and the side base.
[0011] Optionally, a surrounding edge is fixedly connected to the upper surface of the side enclosure column, and pulling holes are opened on the outer side wall of the surrounding edge.
[0012] Optionally, one side of the outer wall of the center enclosure column and the side enclosure column is rotatably connected to a support rod, and the end of the support rod away from the center enclosure column and the side enclosure column is rotatably connected to a support block, the lower surface of the support block is provided with a support pad, and one side of the upper surface of the support block is opened with a supporting ground nail hole.
[0013] Optionally, a foundation ground nail hole plate is provided on the side of the upper surface of the side base away from the central enclosure column, the variable distance base is a hollow base, and a water injection hole is provided in the center of the upper surface of the variable distance base, and the lower surfaces of the central base, variable distance base and side base are all provided with ground sealing strips.
[0014] Optionally, winding rollers are rotatably connected to the four corners of the inner bottom wall of the central enclosure column, a spiral spring is provided at the top of the winding roller, one end of the retractable water retaining cloth is fixedly connected to the winding roller, and the end of the retractable water retaining cloth away from the winding roller is fixedly connected to the side enclosure column.
[0015] In summary, this application has the following beneficial effects:
[0016] 1. In this application, through the coordination of the central base, the central enclosure column, the variable-pitch base, the side base, the variable-pitch support fence, the side enclosure column, the telescopic water retaining cloth, the lifting and closing water retaining assembly and the groove, the device can be moved and set according to the needs. The staff can adjust the distance between the central base and the side base according to the project needs, and adjust the distance between the central enclosure column and the side enclosure column, so as to flexibly adjust the enclosure length of the device, so that the device can adapt to the installation requirements of different construction sites, effectively improve the application scope of the device, and at the same time, the center base, the variable-pitch base and the upper part of the side base can be effectively sealed, so as to effectively ensure the overall water retaining performance of the device;
[0017] 2. This application can effectively seal the ground and the device under different engineering geological conditions through the setting of lifting and closing water retaining assembly support rods, support blocks, support pads, support ground nail holes, basic ground nail hole plates and water injection holes, and at the same time seal the center base, variable pitch base and side base, thereby effectively improving the overall water retaining capacity of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of this application;
[0019] Figure 2 This is a schematic diagram of the main cross-sectional structure used in this application to show the lifting and closing water retaining assembly;
[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the base of the application center;
[0021] Figure 4 This is a schematic diagram of the structure of the base of the center of this application when viewed from above;
[0022] Figure 5 This is a schematic diagram of the side cross-sectional structure of the scroll spring used in the present application;
[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the winding roller used in the present application;
[0024] Figure 7 This is a schematic diagram of a top view and cross-section structure of a scroll spring used in the present application;
[0025] Figure 8 This is a schematic diagram of the main cross-sectional structure used in this application to show the perforation;
[0026] Fig. 9 It is a schematic diagram of the cross-sectional structure of the central enclosure column of this application;
[0027] Fig.10 It is a schematic diagram of the side cross-sectional structure of the side enclosure column of the present application;
[0028] Fig.11 It is a schematic diagram of the three-dimensional structure when the present application is installed mutually.
[0029] Description of reference numerals:
[0030] 1. Center base; 2. Center enclosure column; 3. Variable pitch base; 4. Side base; 5. Variable pitch support fence; 6. Side enclosure column; 7. Telescopic water retaining cloth; 8. Lifting closed water retaining assembly; 801. Center sliding block; 802. Side sliding block; 803. Telescopic sealing strip; 804. First sealing strip; 805. Second sealing strip; 806. Rubber sealing strip; 807. Connecting block; 808. Sealing bolt; 9. Groove; 10. Perforation; 11. Mounting bolt; 12. Threaded hole; 13. Surrounding edge; 14. Pulling hole; 15. Support rod; 16. Support block; 17. Support pad; 18. Support ground nail hole; 19. Foundation ground nail hole plate; 20. Water injection hole; 21. Ground sealing strip; 22. Winding roller; 23. Vortex spring. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-11 This application is described in further detail.
[0032] Please refer to Figure 1 , Figure 2 and Figure 3 The waterproof enclosure structure for engineering construction includes a central base 1 and a central enclosure column 2 bolted to the central base 1. Both ends of the central base 1 are slidably connected with variable-pitch bases 3. One end of the variable-pitch base 3 away from the central base 1 is slidably connected with a side base 4. When in use, the distance between the two side bases 4 and the central base 1 is first adjusted according to engineering needs (adjusted by sliding the variable-pitch base 3 along the central base 1 and sliding the two side bases 4 along the variable-pitch base 3).
[0033] Reference Figure 1 , Figure 4 and Figure 5, both sides of the outer wall of the side base 4 are fixedly connected with a foundation ground nail hole plate 19, the variable pitch base 3 is a hollow base, and a water injection hole 20 is opened in the center of the upper surface of the variable pitch base 3. When the distance adjustment of the two side bases 4 is completed, water is added to the water injection hole 20 to improve the stability of the central base 1, the variable pitch base 3 and the side base 4. The lower surfaces of the central base 1, the variable pitch base 3 and the side base 4 are all provided with a ground sealing strip 21 (the ground sealing strip 21 should be a rubber sealing strip, so as to try to ensure that the ground sealing strip 21 has a certain deformation ability). When the ground during the construction is a relatively soft ground, ground nails are driven into the foundation ground nail hole plate 19 to improve the stability of the central base 1, the variable pitch base 3 and the side base 4. The stability of the central base 1, the variable pitch base 3 and the side base 4 should be ensured. At the same time, it should be ensured that the ground sealing strip 21 sinks part of the soil to ensure the relative sealing between the ground and the central base 1, the variable pitch base 3 and the side base 4. When the construction ground is a hard ground such as concrete and asphalt, it is not necessary to drive ground nails into the foundation ground nail hole plate 19. At this time, due to the increase in weight caused by water injection inside the variable pitch base 3, the ground sealing strip 21 on the lower surface of the variable pitch base 3 and the ground sealing strip 21 on the lower surface of the central base 1 and the side base 4 close to the variable pitch base 3 rely on deformation to fill the gap between the two, so that the central base 1, the variable pitch base 3 and the side base 4 can be relatively sealed with the ground;
[0034] Reference Figure 1 , Figure 6 and Figure 7 , the centers of both sides of the outer wall of the central enclosure column 2 are fixedly connected with variable-pitch support fences 5, and the ends of the variable-pitch support fences 5 away from the central enclosure column 2 are fixedly connected with side enclosure columns 6, and a telescopic water-retaining cloth 7 is arranged between the central enclosure column 2 and the side enclosure column 6. The four corners of the inner bottom wall of the central enclosure column 2 are rotatably connected with winding rollers 22, and the top of the winding roller 22 is provided with a volute spring 23. One end of the telescopic water-retaining cloth 7 is fixedly connected to the winding roller 22, and the end of the telescopic water-retaining cloth 7 away from the winding roller 22 is fixedly connected to the side enclosure column 6. When the distance between the two side bases 4 and the central base 1 is adjusted and has been laid on the ground, the staff can start to adjust the two side enclosure columns. 6 and the center enclosure column 2 is the same as the distance between the two side bases 4 and the center base 1. During this process, the variable-pitch support fence 5 expands and contracts following the distance between the two side enclosure columns 6 and the center enclosure column 2. At the same time, when the distance between the two side enclosure columns 6 and the center enclosure column 2 needs to be increased, the winding roller 22 rotates to compress the volute spring 23. When the distance between the two side enclosure columns 6 and the center enclosure column 2 is shortened, the volute spring 23 is slowly released, driving the winding roller 22 to rewind the telescopic water retaining cloth 7, thereby ensuring that the unreeled portion of the telescopic water retaining cloth 7 is as straight as possible, thereby blocking the water that may splash from the outside to the construction site.
[0035] Reference Figure 8, Fig. 9 and Fig.10 , a through hole 10 is provided at the center of the upper surface of the side enclosure column 6 and at both sides of the upper surface of the center enclosure column 2, and a mounting bolt 11 is inserted into the through hole 10, and a threaded hole 12 compatible with the mounting bolt 11 is provided on the upper surface of the center base 1 and the side base 4, and one side of the outer wall of the center enclosure column 2 and the side enclosure column 6 is rotatably connected with a support rod 15. When it is necessary to install the center enclosure column 2 and the side enclosure column 6 to the center base 1 and the side base 4 respectively, first rotate the center enclosure column 2 and the side enclosure column 6 so that the side connected to the support rod 15 faces the construction direction of the project, and insert the mounting bolt 11 into the through hole 10, and the mounting bolt 11 naturally falls to abut the threaded hole 12. At this time, the mounting bolt 11 is screwed to make the mounting bolt threadedly connected to the threaded hole 12 to complete the installation;
[0036] Reference Figure 1 and Figure 7 , one end of the support rod 15 away from the central enclosure column 2 and the side enclosure column 6 is rotatably connected to a support block 16, a support pad 17 is provided on the lower surface of the support block 16, and a support ground nail hole 18 is opened on one side of the upper surface of the support block 16. When the device is used on soft ground, ground nails are driven into the support ground nail holes 18 to ensure the stability of the support rod 15 as much as possible. When the device is used on hard ground such as concrete and asphalt, it is not necessary to drive ground nails into the support ground nail holes 18, but the friction between the support block 16 and the support pad 17 and the ground is relied on to ensure the stability of the support rod 15;
[0037] Reference Figure 1 , Figure 2 and Fig. 9The bottom ends of the outer walls of the central enclosure column 2 and the side enclosure column 6 are slidably connected with a lifting and closing water retaining assembly 8. Grooves 9 are provided on the upper surfaces of the central base 1 and the side base 4 near the two sides of the lifting and closing water retaining assembly 8. The lifting and closing water retaining assembly 8 includes a central sliding block 801 slidably connected to the two sides of the outer walls of the central enclosure column 2 and a side sliding block 802 slidably connected to the side enclosure column 6. A telescopic sealing strip 803 slidably connected to both the central sliding block 801 and the side sliding block 802 is arranged between the central sliding block 801 and the side sliding block 802. The bottoms of the central sliding block 801 and the side sliding block 802 are fixedly connected with a first sealing strip 804, and the bottoms of the telescopic sealing strip 803 are fixedly connected with a second sealing strip 805. The bottoms of the first sealing strip 804 and the second sealing strip 805 are fixedly connected with a rubber sealing strip 806. The side enclosure column 6 and the outer walls of the central enclosure column 2 are fixedly connected with connecting blocks 807 on both sides. The connecting blocks 807 have internal threaded connections. The sealing bolt 808 is connected to the connecting block 807, and a threaded groove is provided inside the connecting block 807. The sealing bolt 808 is threadedly connected to the connecting block 807 through the threaded groove. The bottom end of the sealing bolt 808 is rotatably connected to the side sliding block 802 and the center sliding block 801. When the distance between the two side enclosure columns 6 and the center enclosure column 2 is adjusted, the side sliding block 802 moves synchronously with the side enclosure column 6. When the distance between the two side enclosure columns 6 and the center enclosure column 2 is adjusted, the sealing bolt 808 is screwed in. Bolt 808, the sealing bolt 808 moves downward along the thread groove in the connecting block 807, and drives the side sliding block 802 and the center sliding block 801 to move downward until the rubber sealing strip 806 abuts against the inner bottom wall of the groove 9, and continues to screw the sealing bolt 808, so that the side sliding block 802 and the center sliding block 801 move slightly downward a certain distance until the rubber sealing strip 806 is deformed to fill the gap between the rubber sealing strips 806, thereby further improving the waterproof ability of the device;
[0038] Reference Figure 1 , Figure 8 and Fig.11 One of the side enclosure columns 6 is fixedly connected to a surrounding edge 13 on all sides of the upper surface, and tension holes 14 are opened on all sides of the outer wall of the surrounding edge 13. Through the setting of the tension holes 14, after the device is evenly installed along the edge of the project scope, tension bolts are installed in the tension holes 14 of two adjacent surrounding edges 13 and tightened as much as possible to complete the mutual fixation between the tops of the two adjacent devices.
[0039] The implementation principle of the present application is as follows: at the beginning of the project, the distance between the two side bases 4 and the center base 1 is first adjusted according to the needs of the project (adjusted by sliding the variable pitch base 3 along the center base 1 and the two side bases 4 along the variable pitch base 3). When the distance adjustment of the two side bases 4 is completed, water is added to the water injection hole 20 to thereby improve the stability of the center base 1, the variable pitch base 3 and the side base 4. When the ground during the construction of the project is a relatively soft ground, ground nails are driven into the foundation ground nail hole plate 19 to improve the stability of the center base 1, the variable pitch base 3 and the side base 4. When the ground sealing strip 21 is sunk into a part of the soil, the relative sealing between the ground and the center base 1, the variable distance base 3 and the side base 4 should be ensured. When the construction ground is a hard ground such as concrete and asphalt, it is not necessary to drive ground nails into the foundation ground nail hole plate 19. At this time, due to the increase in weight caused by water injection inside the variable distance base 3, the ground sealing strip 21 on the lower surface of the variable distance base 3 and the ground sealing strip 21 on the lower surface of the center base 1 and the side base 4 close to the variable distance base 3 fill the gap between them by deformation, so that the center base 1, the variable distance base 3 and the side base 4 can be relatively sealed with the ground.
[0040] When the distance between the two side bases 4 and the center base 1 is adjusted and laid on the ground, the staff can start to adjust the distance between the two side enclosure columns 6 and the center enclosure column 2 to be the same as the distance between the two side bases 4 and the center base 1. During this process, the variable-distance support fence 5 expands and contracts following the distance between the two side enclosure columns 6 and the center enclosure column 2. At the same time, when it is necessary to increase the distance between the two side enclosure columns 6 and the center enclosure column 2, the winding roller 22 rotates to compress the spiral spring 23. When the distance between the two side enclosure columns 6 and the center enclosure column 2 is shortened, the spiral spring 23 is slowly released to drive the winding. The roller 22 rolls up the telescopic water retaining cloth 7, thereby ensuring that the unrolled portion of the telescopic water retaining cloth 7 is as straight as possible, thereby blocking the water that may splash onto the construction site from the outside, and then rotates the central enclosure column 2 and the side enclosure column 6 so that the side connected to the support rod 15 faces the construction direction, and inserts the mounting bolt 11 into the through hole 10. The mounting bolt 11 naturally falls to abut the threaded hole 12. At this time, the mounting bolt 11 is screwed so that the mounting bolt is threadedly connected to the threaded hole 12 to complete the installation. When adjusting the distance between the two side enclosure columns 6 and the central enclosure column 2, the side sliding block 802 moves synchronously with the side enclosure column 6;
[0041] When the distance between the two side enclosure columns 6 and the center enclosure column 2 is adjusted, the sealing bolt 808 is screwed, and the sealing bolt 808 moves downward along the threaded groove in the connecting block 807, and drives the side sliding block 802 and the center sliding block 801 to move downward until the rubber sealing strip 806 abuts against the inner bottom wall of the groove 9, and the sealing bolt 808 is continued to be screwed, so that the side sliding block 802 and the center sliding block 801 move slightly downward a certain distance until the rubber sealing strip 806 is deformed to fill the gap between the rubber sealing strips 806, thereby further improving the waterproof ability of the device, by setting the pulling hole 14;
[0042] After the devices are evenly installed along the edge of the project, install the tension bolts in the tension holes 14 of the two adjacent surrounding edges 13 and tighten them as much as possible to complete the fixation between the two adjacent devices;
[0043] When the tops of two adjacent devices are fixed to each other, if the two devices are at a corner, the support rods 15 of the two corner devices near the corner will conflict with each other. One of the support rods 15 can be rotated to not be supported on the ground to avoid the two support rods 15 from conflicting with each other (at this time, the side base 4 of one device abuts against the side base 4 of the other device, which can also play a supporting role).
[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A waterproof enclosure structure for engineering construction, comprising a central base (1) and a central enclosure column (2) bolted to the central base (1), characterized in that: The two ends of the central base (1) are slidably connected to variable-pitch bases (3), and the end of the variable-pitch base (3) away from the central base (1) is slidably connected to a side base (4); The centers of both sides of the outer wall of the central enclosure column (2) are fixedly connected with variable-distance support fences (5), and the ends of the variable-distance support fences (5) away from the central enclosure column (2) are fixedly connected with side enclosure columns (6). A telescopic water retaining cloth (7) is arranged between the central enclosure column (2) and the side enclosure column (6). The bottom ends of the outer walls of the central enclosure column (2) and the side enclosure column (6) are slidably connected with a lifting and closing water retaining assembly (8), and grooves (9) are provided on the upper surfaces of the central base (1) and the side base (4) near both sides of the lifting and closing water retaining assembly (8).
2. The waterproof enclosure structure for engineering construction according to claim 1 is characterized by: The lifting and closing water-blocking assembly (8) comprises a central sliding block (801) slidably connected to the two sides of the outer wall of the central enclosure column (2) and a side sliding block (802) slidably connected to the side enclosure column (6); a telescopic sealing strip (803) slidably connected to both the central sliding block (801) and the side sliding block (802) is arranged between the central sliding block (801) and the side sliding block (802); a first sealing strip (804) is fixedly connected to the bottom of the central sliding block (801) and the side sliding block (802); The bottom of the telescopic sealing strip (803) is fixedly connected to the second sealing strip (805), the bottoms of the first sealing strip (804) and the second sealing strip (805) are fixedly connected to rubber sealing strips (806), and both sides of the outer walls of the side enclosure column (6) and the center enclosure column (2) are fixedly connected to connecting blocks (807), and the internal threads of the connecting blocks (807) are connected to sealing bolts (808), and the bottom ends of the sealing bolts (808) are rotatably connected to the side sliding blocks (802) and the center sliding block (801).
3. The waterproof enclosure structure for engineering construction according to claim 2 is characterized in that: A through hole (10) is provided at the center of the upper surface of the side enclosure column (6) and at both sides of the upper surface of the center enclosure column (2), and a mounting bolt (11) is inserted into the through hole (10). Threaded holes (12) matching the mounting bolts (11) are provided on the upper surfaces of the center base (1) and the side base (4).
4. The waterproof enclosure structure for engineering construction according to claim 3 is characterized by: The upper surface of the side enclosure column (6) is fixedly connected with a surrounding edge (13) on all sides, and the outer side wall of the surrounding edge (13) is provided with pulling holes (14) on all sides.
5. The waterproof enclosure structure for engineering construction according to claim 4 is characterized by: One side of the outer wall of the central enclosure column (2) and the side enclosure column (6) is rotatably connected to a support rod (15), and one end of the support rod (15) away from the central enclosure column (2) and the side enclosure column (6) is rotatably connected to a support block (16), a support pad (17) is provided on the lower surface of the support block (16), and a supporting ground nail hole (18) is opened on one side of the upper surface of the support block (16).
6. The waterproof enclosure structure for engineering construction according to claim 5 is characterized by: The two sides of the outer wall of the side base (4) are fixedly connected with basic ground nail hole plates (19); the variable pitch base (3) is a hollow base, and a water injection hole (20) is opened at the center of the upper surface of the variable pitch base (3); the lower surfaces of the central base (1), the variable pitch base (3) and the side base (4) are all provided with ground sealing strips (21).
7. The waterproof enclosure structure for engineering construction according to claim 6 is characterized by: The four corners of the inner bottom wall of the central enclosure column (2) are rotatably connected to a winding roller (22), a spiral spring (23) is provided at the top of the winding roller (22), one end of the telescopic water retaining cloth (7) is fixedly connected to the winding roller (22), and the end of the telescopic water retaining cloth (7) away from the winding roller (22) is fixedly connected to the side enclosure column (6).