High-strength anti-bulging formwork shearing wall pouring mold

Abstract

The utility model relates to a high -strength anti -inflation mould's shearing force wall pouring mould belongs to building construction technical field, this high -strength anti -inflation mould's shearing force wall pouring mould, include: stud bolt and the positioning mechanism of two quantity, the surface of stud bolt is provided with two quantity of backing plate, two threaded parts of stud bolt all are connected with nut, two nut are respectively arranged in the opposite end of two backing plate, through the cooperation of gasket and elastomer washer of positioning mechanism, compress elastomer washer to produce the sustained reverse spring force in the nut tightening process, provide stable axial pre -tightening force for the threaded connection of stud bolt, effectively compensate the pre -tightening force attenuation caused by vibration or load variation, constitute the first anti -loosening safeguard, the reliability of bolt connection has been improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a high-strength anti-expansion mold for shear wall casting. Background Technology

[0002] Shear wall casting molds using tie bolt systems are mainly made of plywood and consist of a panel, support reinforcement, tie bolts, and a sealing system. They can fix the concrete pouring space and resist lateral pressure. They are suitable for the construction of multi-story and high-rise shear walls, with low cost and strong adaptability. They can balance construction efficiency and shear wall forming accuracy, making them a common choice for shear wall construction in civil buildings.

[0003] Because tie bolts need to be set up in multiple sets during use, when workers are tightening a large number of nuts, they may be fatigued or negligent and only "tighten" them with a wrench instead of "tightening" them, thus failing to provide sufficient preload. Furthermore, the bolts themselves are "passively stressed" and will only be truly tightened when the formwork undergoes slight deformation under the pressure of concrete. At this point, the preload is insufficient and irreversible. Utility Model Content

[0004] Therefore, it is necessary to provide a high-strength anti-expansion shear wall casting mold to address the problem that insufficient preload of tie bolts due to improper nut tightening in existing shear wall casting molds affects the stability of the mold and the quality of concrete forming.

[0005] A high-strength anti-expansion mold for shear wall casting includes: a double-ended screw and two positioning mechanisms. The surface of the double-ended screw is provided with two pads. Nuts are threaded to both threaded parts of the double-ended screw, and the two nuts are respectively located at opposite ends of the two pads.

[0006] In one embodiment, the positioning mechanism includes a washer disposed between the pad and the nut. The washer is sleeved on the surface of the threaded portion of the double-ended screw. A groove is formed at the end of the washer facing away from the pad. An elastomeric washer that contacts the nut is embedded inside the groove. The elastomeric washer is always in a compressed state.

[0007] In one embodiment, the surface of the nut is provided with an adjustment cavity, and the end of the washer facing away from the pad is provided with a positioning cavity communicating with the adjustment cavity. The positioning mechanism further includes an anti-loosening component, which includes a gear rotatably connected inside the adjustment cavity. Both opposite sides of the gear are meshed with racks that are slidably connected to the adjustment cavity. The opposite ends of the two racks both extend out of the adjustment cavity, and the end of one rack facing the pad is inserted into the positioning cavity.

[0008] In one embodiment, the horizontal cross-sectional shape of one of the racks and the positioning cavity insertion part is a matching right triangle, and the direction in which the rack and the positioning cavity slope are opposite to the direction in which the nut penetrates into the threaded part of the double-ended screw is the same.

[0009] In one embodiment, another rack is fixedly connected to the adjustment cavity with a spring, the spring being a rubber component.

[0010] In one embodiment, the vertical cross-sectional shape of the contact area between the rack and the positioning cavity is a matching rectangle.

[0011] In one embodiment, the number of positioning cavities is no less than twenty, and the positioning cavities are distributed in a ring around the axis of the double-ended screw.

[0012] In one embodiment, the anti-loosening component further includes a cover plate that is bonded to the surface of the nut and covers the opening of the positioning cavity.

[0013] In one embodiment, the washer has evenly distributed slots at the end facing the nut, and the washer is fixedly connected to evenly distributed pins that are respectively inserted into adjacent slots at the end facing away from the nut.

[0014] Beneficial effects 1. The high-strength anti-expansion mold for shear wall casting, through the positioning mechanism and the cooperation of the gasket and the elastic washer, compresses the elastic washer during the tightening of the nut to generate a continuous reverse elastic force, providing a stable axial preload for the threaded connection of the double-ended screw, effectively compensating for the preload attenuation caused by vibration or load changes, forming the first layer of anti-loosening protection, and significantly improving the reliability of the bolt connection.

[0015] 2. The anti-loosening component drives the movement of racks on both sides through gears. One rack is embedded in the positioning cavity of the washer under the action of a spring, forming a mechanical self-locking mechanism. When the nut rotates in the opposite direction, the rigid interference of the right-angle surface completely locks the nut, preventing slight rotational loosening and providing a highly reliable mechanical anti-loosening guarantee. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a vertical sectional view of a partial structure in this utility model; Figure 3 This is a horizontal cross-sectional view of a partial structure in this utility model; Figure 4 for Figure 3 Enlarged view of A in the middle; Figure 5 This is an exploded view of the positioning mechanism in this utility model; Figure 6 This is a schematic diagram of the assembly of the shear wall casting mold in this utility model.

[0018] Figure label: 100. Double-ended screw; 200. Washer plate; 210. Slot; 300. Nut; 310. Adjustment cavity; 400. Positioning mechanism; 410. Washer; 411. Groove; 412. Positioning cavity; 420. Elastomer washer; 430. Anti-loosening component; 431. Gear; 432. Rack; 433. Spring; 434. Cover plate; 440. Insert post. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] The following is combined with Figure 1 - Figure 6 This invention describes a high-strength anti-expansion mold for shear wall casting.

[0021] In one embodiment, a high-strength anti-expansion mold for shear wall casting includes: a double-ended screw 100 and two positioning mechanisms 400. The surface of the double-ended screw 100 is provided with two pads 200. Nuts 300 are threadedly connected to the two threaded parts of the double-ended screw 100. The two nuts 300 are respectively disposed at opposite ends of the two pads 200.

[0022] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the positioning mechanism 400 includes a washer 410 disposed between the pad 200 and the nut 300, and the washer 410 is sleeved on the surface of the threaded portion of the double-ended screw 100. When the nut 300 is tightened, the nut 300 screws in and compresses the elastic washer 420 below it. The elastic washer 420 is compressed and generates a continuous reverse elastic force, providing a stable axial preload for the threaded connection, effectively compensating for the preload attenuation that may be caused by vibration, thus forming an anti-loosening guarantee. The end of the washer 410 facing away from the pad 200 has a groove 411, and the elastic washer 420 that contacts the nut 300 is embedded in the groove 411. The elastic washer 420 is always in a compressed state. The end of the pad 200 facing the nut 300 has evenly distributed slots 210, and the end of the washer 410 facing away from the nut 300 is fixedly connected to evenly distributed inserts 440 that are respectively inserted into adjacent slots 210. When the insert 440 is inserted into the slot 210 of the pad 200, this engagement prevents the washer 410 from rotating with the nut 300, creating the necessary static reference condition for locking the rack 432, and ensuring that the anti-loosening mechanism can be accurately aligned and function.

[0023] like Figure 4 and Figure 5As shown, the surface of the nut 300 has an adjustment cavity 310, and the end of the washer 410 facing away from the pad 200 has a positioning cavity 412 that communicates with the adjustment cavity 310. Multiple positioning cavities 412 are arranged in a ring around the axis of the double-ended screw 100 on the gasket 410. This design ensures that no matter what angle the nut 300 is tightened to, there is always a positioning cavity 412 that can be precisely aligned with the rack 432 and locked, which greatly improves the applicability and reliability of the anti-loosening mechanism. The positioning mechanism 400 also includes an anti-loosening component 430, which includes a gear 431 rotatably connected inside the adjustment cavity 310. The opposite sides of the gear 431 are meshed with racks 432 that are slidably connected to the adjustment cavity 310. The opposite ends of the two racks 432 extend out of the adjustment cavity 310. One end of the rack 432 facing the pad 200 is inserted into the positioning cavity 412. Under the elastic force of the spring 433, the rack 432 connected to it drives the gear 431 to rotate. The gear 431 then pushes the rack 432 on the other side to move outward and embed into the positioning cavity 412 of the gasket 410. This mechanical self-locking mechanism allows for smooth tightening operations. When the nut 300 shows a tendency to loosen due to reverse rotation, the vertical right-angled surface of the rack 432 rigidly interferes with the vertical surface of the positioning cavity 412, completely locking the nut 300 and preventing any slight rotation, thus forming the most reliable anti-loosening mechanism. The horizontal cross-sectional shape of the insertion part of one of the racks 432 and the positioning cavity 412 are both matching right-angled triangles, and the inclined surfaces of one of the racks 432 and the positioning cavity 412 are both inserted into the double-ended screw 10 with their faces away from the nut 300. The threads at all points are oriented in the same direction. A spring 433, made of rubber, is fixedly connected between another rack 432 and the adjusting cavity 310. The vertical cross-sectional shape of the contact area between the rack 432 and the positioning cavity 412 is a matching rectangle. There are at least twenty positioning cavities 412, arranged in a ring around the axis of the double-ended screw 100. The anti-loosening component 430 also includes a cover plate 434, which is adhered to the surface of the nut 300 and covers the opening of the positioning cavity 412. The cover plate 434 effectively seals the adjusting cavity 310, preventing dust, cement slurry, and other contaminants from entering the moving mechanism of the gear 431 and rack 432, ensuring its responsiveness and long-term reliability.

[0024] In this embodiment, during the final tightening of the nut 300, the insert 440, fixedly connected to the washer 410, is inserted into the slot 210 of the pad 200. This engagement prevents the washer 410 from rotating with the nut 300. At this time, a positioning cavity 412 on the washer 410 rotates to align with the rack 432 inside the adjusting cavity 310 of the nut 300. The engagement between the insert 440 and the slot 210 ensures accurate alignment of the positioning cavity 412, creating conditions for locking the rack 432.

[0025] Driven by the spring 433, the rack 432 connected to it drives the gear 431 to rotate. The gear 431 then pushes the rack 432 on the other side to move outward and embed into the positioning cavity 412 of the washer 410. Since the contact surface between the rack 432 and the positioning cavity 412 is a right-angled triangular inclined plane, and the direction of the inclined plane is the same as the tightening direction of the nut 300, the tightening operation can be carried out smoothly. When the nut 300 has a tendency to loosen by rotating in the opposite direction, the right-angled surface of the rack 432 will rigidly interfere with the right-angled surface of the positioning cavity 412, generating mechanical self-locking, completely preventing the nut 300 from rotating back, and providing the most reliable mechanical anti-loosening guarantee.

[0026] Multiple positioning cavities 412 are arranged around the axis of the double-ended screw 100 on the gasket 410. This annular distribution of multiple positioning cavities 412 ensures that no matter what angle the nut 300 is tightened to, there is always one positioning cavity 412 that can align with the rack 432 of the anti-loosening component 430 and achieve locking, greatly improving the applicability and reliability of the mechanism. Covering the opening of the adjustment cavity 310 with the cover plate 434 can prevent contaminants such as dust and cement slurry from entering the adjustment cavity 310, protecting the moving mechanism of the gear 431 and rack 432 and ensuring their long-term effective operation.

[0027] like Figure 6 As shown, the shear wall casting mold also includes template units and splicing system. The pad plate 200 is fixedly installed on the outside of the template unit. The splicing system includes horizontal strip blocks and vertical strip blocks. The horizontal strip blocks are installed at the vertical joint of two adjacent template units by bolts. Bolt holes for double-headed screws 100 to pass through are evenly opened on the side wall of the horizontal strip blocks. The vertical strip blocks are installed at the horizontal joint of two adjacent template units. The horizontal strip blocks and vertical strip blocks are connected to the grooves 411 on the edge of the template unit by the protrusions at their ends.

[0028] The shear wall casting mold also includes a back rib, which is vertically installed on the outside of the template unit. The pad 200 is fixedly installed on the back rib, and the lower end of the back rib is inserted into the slot 210 fixed in the bottom template or foundation.

[0029] The shear wall casting mold also includes an upper clamping device, which includes a slider, tie rods, fastening long bolts, connecting plates, hand-tightening bolts, and push plates. The upper clamping device is located above the top template unit of the wall. By tightening the hand-tightening bolts, the push plates and clamping strips are pushed to press the upper end of the back rib.

[0030] The shear wall casting mold also includes sealing blocks, which are used to seal the bolt holes on the horizontal strip blocks where no double-ended screws 100 are used, preventing concrete slurry from flowing into the holes and causing blockage. The template unit is a standardized steel plate or high-strength plywood. The four edges of the template unit are provided with grooves 411, and the four inner corners are provided with through holes for precise docking and fixing with the strip blocks of the splicing system. The back rib is a double steel pipe or steel structure, which can distribute the concentrated force of the tie bolts to a larger area of ​​the template surface and provide overall stiffening for the template. The horizontal strip block is a key component for the tie bolts to bear the force. A series of standard-spaced bolt holes are evenly provided on its side wall for the double-ended screws 100 to pass through. The vertical strip block is used to strengthen the connection and sealing of the horizontal joints. It does not have bolt holes and mainly uses protrusions and bolts to achieve splicing between template units.

[0031] The usage procedure for this shear wall casting mold is as follows: The standardized template units are fitted with the protrusions at the ends of the horizontal and vertical strip blocks via grooves 411 on their edges, and then secured with bolts to form a two-sided wall form of the required size. This modular design enables non-destructive splicing of template units, avoiding direct drilling into the template panels, thereby greatly improving the turnover rate of the templates, saving material costs, and ensuring a smooth, hole-free concrete wall surface, significantly improving molding quality and waterproof performance.

[0032] Based on the designed spacing, the double-ended bolt 100 is inserted through the bolt hole of the transverse strip block on one side of the template, passes through the wall, and exits through the bolt hole of the corresponding transverse strip block on the other side of the template. This design shifts the stress concentration point of the tie bolts from the fragile template panel to the robust dedicated transverse strip block, optimizing the force transmission path and providing high-strength anti-bulging capability for the entire mold system.

[0033] Double steel pipes or steel back ribs are vertically installed on the outside of the template unit, and their lower ends are inserted into the pre-reserved cavity in the bottom layer for initial fixation. The pad 200 is tightly attached to the back rib, and the double-ended screw 100 passes through the pad 200. As the main load-bearing keel, the back rib can effectively distribute the concentrated clamping force generated by the double-ended screw 100 to a larger area of ​​the template unit, significantly enhancing the overall rigidity and stability of the template system and effectively preventing local deformation.

[0034] Place washers 410 and elastomeric washers 420 onto both ends of the double-ended screw 100, then screw in the nut 300. Use a tool to initially tighten the nut 300, causing the washer 200 to press against the back rib. Install the upper clamping device at the top of the wall, and tighten the hand-tightening bolts to push the push plate and clamping strip to press against the upper end of the back rib. The upper clamping device provides additional vertical clamping force, effectively preventing the top of the formwork from expanding due to lateral pressure during concrete pouring, ensuring the accuracy of the cross-sectional dimensions and flatness of the top of the wall.

[0035] Finally, tighten all nuts 300 and ensure the anti-loosening component 430 of the positioning mechanism 400 is functioning. Check the verticality, flatness, and sealing of all joints of the formwork. Seal unused bolt holes with sealing blocks. Comprehensive quality checks ensure the installation accuracy of the formwork, laying the foundation for casting a high-quality shear wall; sealing blocks prevent cement grout leakage from clogging bolt holes, ensuring the reusability of the formwork.

[0036] After pouring concrete and waiting for it to reach the demolding strength, the formwork is dismantled in reverse order: first, loosen the upper clamping device and nut 300, pull out the double-ended screw 100, then separate the back ribs, and finally disassemble the splicing system and formwork unit. Each component is cleaned and reused. This non-destructive demolding process protects all formwork components, especially the panels and non-perforated horizontal strips of the formwork unit, allowing them to be quickly and easily used for the next construction phase, greatly improving construction efficiency and the number of times the formwork can be reused.

[0037] Working principle: When the nut 300 is tightened, it screws downwards, compressing the elastomeric washer 420 located between it and the washer 410. The reverse elastic force generated by the compressed elastomeric washer 420 provides a continuous and stable axial preload for the threaded connection of the double-ended screw 100, effectively offsetting the preload attenuation that may be caused by vibration or load changes, thus forming an effective guarantee against loosening.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-strength anti-bulging mold for shear wall casting, characterized in that, include: A double-ended screw (100) has two washers (200) on its surface. Nuts (300) are threaded to both threaded parts of the double-ended screw (100). The two nuts (300) are respectively located at opposite ends of the two washers (200). The positioning mechanism (400) consists of two positioning mechanisms (400), each including a washer (410) disposed between a pad (200) and a nut (300). The washer (410) is fitted onto the surface of the threaded portion of the double-ended screw (100). A groove (411) is provided at one end of the washer (410) facing away from the pad (200). An elastic washer (420) that contacts the nut (300) is embedded in the groove (411). The elastic washer (420) is always in a compressed state.

2. The shear wall casting mold with high-strength anti-bulging mold according to claim 1, characterized in that, The nut (300) has an adjustment cavity (310) on its surface. The washer (410) has a positioning cavity (412) that communicates with the adjustment cavity (310) at one end facing away from the pad (200). The positioning mechanism (400) also includes an anti-loosening component (430). The anti-loosening component (430) includes a gear (431) that is rotatably connected inside the adjustment cavity (310). Both opposite sides of the gear (431) are meshed with racks (432) that are slidably connected to the adjustment cavity (310). The opposite ends of the two racks (432) extend out of the adjustment cavity (310). One of the racks (432) is inserted into the positioning cavity (412) at one end facing the pad (200).

3. The shear wall casting mold with high-strength anti-bulging mold according to claim 2, characterized in that, The horizontal cross-sectional shape of the insertion part of one of the racks (432) and the positioning cavity (412) is a right triangle that matches each other. The inclined surfaces of the rack (432) and the positioning cavity (412) are both facing away from the nut (300) and are in the same direction as the threaded part of the double-ended screw (100).

4. The high-strength anti-bulging mold for shear wall casting according to claim 2, characterized in that, Another rack (432) is fixedly connected to the adjustment cavity (310) by a spring (433), which is a rubber material component.

5. The high-strength anti-bulging mold for shear wall casting according to claim 2, characterized in that, The vertical cross-sectional shape of the contact area between the rack (432) and the positioning cavity (412) is a matching rectangle.

6. The shear wall casting mold with high-strength anti-bulging mold according to claim 2, characterized in that, The number of positioning cavities (412) is not less than twenty, and the positioning cavities (412) are distributed in a ring around the axis of the double-ended screw (100).

7. The high-strength anti-bulging mold for shear wall casting according to claim 2, characterized in that, The anti-loosening assembly (430) also includes a cover plate (434) which is bonded to the surface of the nut (300) and covers the opening of the positioning cavity (412).

8. The shear wall casting mold with high-strength anti-bulging mold according to claim 1, characterized in that, The pad (200) has evenly distributed slots (210) at one end facing the nut (300), and the washer (410) has evenly distributed inserts (440) at one end facing away from the nut (300) that are respectively inserted into the adjacent slots (210).

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