A concrete wall surface maintenance cotton felt fixing device

Abstract

The utility model relates to the technical field of building engineering, disclose a kind of concrete wall maintenance cotton felt fixing device, including two strong magnet, two the strong magnet upper end inside are all threadedly sleeved with screw lifting ring, the screw lifting ring lower end is provided with trapezoidal thread, and cotton felt compression amount accurate control with the adjusting accuracy of 2mm / circle is realized by trapezoidal thread design;Two the screw lifting ring exterior close to upper end position are all fixedly arranged with limit ring, for limiting the up-down moving range of stainless steel flat steel, enhance device stability;Two the screw lifting ring exterior close to limit ring lower end position between sleeve have stainless steel flat steel, the both ends of the stainless steel flat steel are bent into Z type, form rigid support frame, and multiple flat steel holes are provided in its inside.The utility model is in, water retention rate is more than 95%, water saving 50%, stainless steel and magnet recovery rate is more than 90%, can be reused more than 200 times, save labor, reduce cost, improve efficiency.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a fixing device for cotton felt for curing concrete walls. Background Technology

[0002] In the field of construction engineering, concrete wall curing is a crucial step in ensuring the strength and quality of concrete. Current methods for concrete wall curing often involve manually covering the surface with cotton felt and watering to maintain moisture; however, this method has several drawbacks:

[0003] Poor fixation: The cotton felt does not adhere tightly to the wall and is easy to fall off, resulting in poor water retention. The water retention rate of traditional covering methods is ≤70%, which leads to serious waste of water resources.

[0004] Wall surfaces are easily damaged: Traditional fixing methods (such as binding and gluing) require drilling and pasting operations on the wall surface, which can easily damage the wall structure and affect the integrity and durability of the concrete wall surface.

[0005] Insufficient adaptability: It cannot adapt to different thicknesses (5-10mm) of maintenance cotton felt, and its adaptability to wall flatness is also poor, making it difficult to meet the needs of different construction scenarios.

[0006] Low construction efficiency: When curing vertical walls, conventional covering devices are difficult to install and remove quickly, especially in low-temperature environments. The risk of concrete cracking due to insufficient contact increases significantly, seriously affecting construction progress and project quality.

[0007] Low reuse rate: Traditional fixed devices are mostly for single use or have few reuses, resulting in increased construction costs and waste of resources.

[0008] Therefore, those skilled in the art have provided a device for fixing cotton felt for curing concrete walls to solve the problems mentioned in the background art. Utility Model Content

[0009] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a concrete wall curing cotton felt fixing device with a water retention rate of over 95%, saving 50% of water, a stainless steel and magnet recycling rate of over 90%, and the ability to be reused more than 200 times, saving labor, reducing costs, and improving efficiency.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] A fixing device for cotton felt for curing concrete walls includes two strong magnets. Each of the two strong magnets has a screw ring threaded inside its upper end. The lower end of the screw ring has a trapezoidal thread. The trapezoidal thread design enables precise control of the cotton felt compression with an adjustment accuracy of up to 2mm / turn.

[0012] Limiting rings are fixedly installed on the outer side of both screw lifting rings near the upper end to limit the vertical movement range of the stainless steel flat bar and enhance the stability of the device;

[0013] A stainless steel flat bar is fitted between the two screw rings near the lower end of the limiting ring. The two ends of the stainless steel flat bar are bent into a Z shape to form a rigid support frame, and multiple flat bar holes are opened inside it.

[0014] The powerful magnet measures 86mm×63mm×34mm and can be directly attached to reinforced concrete walls, avoiding damage to the wall surface from drilling.

[0015] The stainless steel flat bar has a size of 1000mm×25mm×3mm, with a central opening for connection to the magnetic eye bolt. The distance between the central opening and the center of the magnetic eye bolt is 40mm.

[0016] Furthermore, the screw ring is connected to a powerful magnet via a trapezoidal thread. Each rotation of the knob allows for a 2mm height adjustment, with an adjustment range of 0-10mm, to accommodate changes in the thickness of the compressed cotton felt and varying wall surface flatness.

[0017] Furthermore, the Z-shaped bending structure of the stainless steel flat bar, in conjunction with a powerful magnet, forms a magnetic-mechanical composite fixing structure.

[0018] Furthermore, the two powerful magnets and the stainless steel flat bar form a rigid support frame, which is magnetically attached to the concrete wall to avoid physical damage to the wall.

[0019] This utility model has the following beneficial effects:

[0020] 1. The present invention proposes a fixing device for fixing cotton felt for curing concrete walls. This fixing device achieves a tight fit between the cotton felt and the concrete wall through a rigid support frame formed by a strong magnet and a Z-shaped stainless steel flat steel. The water retention rate can be increased to more than 95%, which is significantly improved compared with the traditional covering method (water retention rate ≤70%). It effectively reduces water evaporation and reduces water consumption by 50%, which meets the green construction standards.

[0021] 2. This utility model proposes a concrete wall curing cotton felt fixing device. The main body of the device is made of stainless steel flat steel and strong magnets. The recycling rate is ≥90%, and it can be reused more than 200 times. The cost per use is reduced to 15%-20% of the traditional method. At the same time, it reduces the concrete rework rate caused by improper curing, saves about 8%-10% of material waste per project, and significantly reduces construction costs. Attached Figure Description

[0022] Figure 1 This is an axonometric view of the present invention;

[0023] Figure 2 This is an axial side view of the stainless steel flat bar of this utility model;

[0024] Figure 3 This is a partial axonometric view of the present invention;

[0025] Figure 4 This is an axial side view of the powerful magnet of this utility model.

[0026] Legend:

[0027] 1. Screw eyelet; 2. Strong magnet; 3. Stainless steel flat bar; 4. Flat bar hole; 5. Limiting ring; 6. Trapezoidal thread. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Reference Figure 1-4 One embodiment of this utility model is a fixing device for cotton felt used for curing concrete walls, which includes two strong magnets 2. The strong magnets 2 are 86mm×63mm×34mm in size and are made of neodymium iron boron permanent magnet material with a magnetic flux density ≥0.8T. The single piece adsorption bearing capacity is verified to be ≥15kg by a 5kg sand drop test. It can be directly adsorbed on concrete walls with steel bars with a steel bar spacing ≤200mm and the adsorption effect is the best.

[0030] Specifically, it utilizes the magnetic coupling effect between permanent magnets and steel bars in concrete to form an attraction force. The magnetic field penetrates the concrete protective layer by ≤50mm and generates an electromagnetic attraction force with the steel bars. No additional energy input is required, avoiding the drilling damage or chemical corrosion to the wall surface caused by traditional binding and gluing. It is suitable for reinforced concrete walls with strength grades of C20-C60, and the installation efficiency is 40% higher than the traditional method. Moreover, there are no residual traces on the wall surface after disassembly.

[0031] Both powerful magnets 2 have screw rings 1 threadedly fitted inside their upper ends. The lower end of each screw ring 1 has a trapezoidal thread 6 with a thread angle of 30° and a pitch of 2mm. The self-locking characteristic of the trapezoidal thread 6 allows for precise control of the cotton felt compression, achieving an adjustment accuracy of 2mm per turn. The screw rings 1 are threaded to the powerful magnets 2 via the trapezoidal thread 6. When the knob operation torque is ≤15N·m, linear height adjustment of 0-10mm can be achieved, adapting to 5-10mm thick maintenance cotton felt and wall flatness errors of ±3mm.

[0032] Specifically, the mechanical transmission of the trapezoidal thread 6 converts the rotational motion into vertical displacement. The precise pitch of the thread pair enables micro-adjustment. Every 360° rotation of the knob corresponds to a 2mm rise or fall of the hanging ring, meeting the precise control requirements of the cotton felt compression. The dynamic adjustment system can compensate for the thickness change of the cotton felt after water absorption, with the thickness increasing by about 3-5mm after water absorption. This ensures that the cotton felt and the wall surface always maintain a bonding pressure of 0.5-1.0N / cm2, increasing the water retention rate to over 95%.

[0033] Limiting rings 5 ​​are fixedly installed on the outside of the two screw lifting rings 1 near the upper end. The limiting rings 5 ​​are made of Φ12mm stainless steel rings with an inner diameter and a gap of ≤0.5mm between the rings and the screw lifting rings 1. They are used to limit the vertical movement range of the stainless steel flat bar 3 within ±2mm.

[0034] Specifically, the vertical displacement of the stainless steel flat bar 3 is constrained by the physical limiting surface to prevent the flat bar from falling off during the adjustment process. At the same time, a rigid support node is formed to enhance the overall stability of the device and avoid the flat bar from loosening due to vibration. The test showed that the structure can still remain stable in an environment with a wind speed of ≤8. After repeated adjustment 500 times, the limiting accuracy decreased by ≤10%.

[0035] A stainless steel flat bar 3 is fitted between the two screw-type lifting rings 1 near the lower end of the limiting ring 5. The stainless steel flat bar 3 is made of 304 stainless steel, and both ends are bent into a Z-shaped bend with an angle of 90° and a bending radius of 5mm to form a rigid support frame. There are 6 flat bar holes 4 with a diameter of Φ8mm and a hole spacing of 150mm evenly distributed inside. The center hole is connected to the magnetic lifting ring bolt. The center hole is 40mm away from the center of the magnetic lifting ring bolt. When the overall span of the flat bar is 1000mm, the deflection is ≤1.5mm.

[0036] Specifically, the Z-shaped bending structure enhances bending stiffness through the mechanical triangle principle. The flat steel hole 4 is used to insert and fix ropes or hooks, forming a multi-point mechanical connection with the cotton felt. The 40mm eccentricity design between the center hole and the eye bolt ensures that the center of force on the flat steel coincides with the center of magnetic attraction, avoiding eccentric load torque. The rigid frame integrates the attraction force of the two magnets into the overall support force, increasing the load-bearing capacity by 3 times compared to a pure magnetic attraction device. It can withstand the water absorption weight of 4kg / ㎡ cotton felt. After absorbing water, 1㎡ of cotton felt weighs up to 4kg. Moreover, the stainless steel material has a recycling rate of ≥90% and can be reused more than 200 times.

[0037] The Z-shaped bending structure of the stainless steel flat bar 3, combined with the strong magnet 2, forms a magnetic-mechanical composite fixing structure: the magnet provides the initial attraction force, accounting for 60% of the total fixing force, and the flat bar frame provides the pull-out resistance force, accounting for 40% of the total fixing force, through mechanical connection. The synergistic effect of the two makes the device ≥20kg resistant to falling off the vertical wall.

[0038] Specifically, by utilizing a dual fixing mechanism of "magnetic positioning + mechanical reinforcement", when uneven distribution of wall steel bars leads to insufficient local magnetic attraction, the mechanical support structure can compensate for the load-bearing capacity, prevent the cotton felt from falling off, and completely solve the problem of insufficient load-bearing capacity of traditional pure magnetic devices. It can still maintain stable fixation in low-temperature environments of -10℃ to 5℃, preventing concrete cracking caused by loosening of the cotton felt. The construction efficiency is increased by 50% compared to the traditional method, and the curing cycle of a single project can be shortened by 2-3 days.

[0039] Working principle: Two strong magnets (86mm×63mm×34mm) are used to directly adhere to the reinforced concrete wall, eliminating the need for drilling and avoiding damage to the wall. The strong magnetic force generated by the magnets provides the initial fixing force for the entire device, allowing it to adhere stably to the wall.

[0040] A screw-type lifting ring 1 with trapezoidal threads 6 is threaded onto the center of the magnet. Each turn of the knob allows for a 2mm height adjustment (0-10mm range). By rotating the screw-type lifting ring 1, the height can be dynamically adjusted according to the 5-10mm thickness of the compressed cotton felt and the flatness of the wall surface, precisely controlling the amount of cotton felt compression. A stainless steel flat bar 3, bent at both ends into a Z-shape, is bolted to the screw-type lifting ring 1 through a central opening 40mm from the center of the magnetic lifting ring bolt, forming a rigid support frame. This frame enhances overall stability through mechanical support, solving the problem of insufficient load-bearing capacity in pure magnetic devices; furthermore, multiple flat bar holes 4 on the flat bar secure the cotton felt to the wall surface, ensuring a tight fit and effective curing. The entire device utilizes a magnetic-mechanical composite fixing technology to achieve efficient fixing and precise adjustment of the cotton felt for curing concrete walls.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for fixing a concrete wall surface curing blanket comprising two powerful magnets (2), characterized in that: Both of the two powerful magnets (2) have screw rings (1) threaded inside the upper end. The lower end of the screw rings (1) is provided with trapezoidal threads (6). The trapezoidal thread (6) design enables precise control of the cotton felt compression with an adjustment accuracy of 2mm / turn. Limiting rings (5) are fixedly installed on the outside of the two screw lifting rings (1) near the upper end to limit the vertical movement range of the stainless steel flat bar (3) and enhance the stability of the device; A stainless steel flat bar (3) is fitted between the two screw rings (1) near the lower end of the limiting ring (5). The stainless steel flat bar (3) is bent into a Z shape at both ends to form a rigid support frame, and multiple flat bar holes (4) are opened inside it. The powerful magnet (2) has a size of 86mm×63mm×34mm and can be directly adsorbed onto the reinforced concrete wall to avoid drilling and damaging the wall. The stainless steel flat bar (3) has a specification of 1000mm×25mm×3mm, and the center opening is connected to the magnetic eye bolt. The center opening is 40mm away from the center of the magnetic eye bolt.

2. The concrete wall maintenance cotton felt fixing device according to claim 1, characterized in that: The screw ring (1) is threadedly connected to the powerful magnet (2) through a trapezoidal thread (6). The height can be adjusted by 2mm for each rotation of the knob, with an adjustment range of 0-10mm, to adapt to the thickness change of the cotton felt after compression and different wall surface flatness.

3. The concrete wall maintenance cotton felt fixing device according to claim 1, characterized in that: The Z-shaped bending structure of the stainless steel flat bar (3) is combined with the strong magnet (2) to form a magnetic-mechanical composite fixing structure.

4. The concrete wall curing blanket fastening device of claim 1, wherein: The two powerful magnets (2) and the stainless steel flat bar (3) form a rigid support frame. The frame is magnetically attached to the concrete wall to avoid physical damage to the wall.

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