Fastening bolt for precast panel with anti-sag assembly

Abstract

The application discloses a fastening bolt with a subsidence prevention assembly for a prefabricated slab, which comprises a first bolt, a second bolt and a subsidence prevention assembly for fixing the first bolt and the second bolt in the prefabricated slab, wherein the subsidence prevention assembly comprises a bottom plate arranged at the bottom of a prefabricated slab mold, a fixed block fixedly connected to the top of the bottom plate through two supporting rods, a first cavity, a second cavity and a third cavity sequentially arranged from top to bottom in the inside of the fixed block, a first pressing block and a second pressing block slidably connected to the two sides of the first cavity respectively, and a fixing assembly arranged in the inside of the fixed block and comprising a first fixing pin and a second fixing pin, wherein the first fixing pin and the second fixing pin are connected to the outer sides of the first pressing block and the second pressing block respectively, and the movement of the first pressing block and the second pressing block can drive the movement of the first fixing pin and the second fixing pin, so as to fix the first bolt and the second bolt.

Description

Technical Field

[0001] This invention belongs to the field of bolt processing technology, specifically relating to a fastening bolt for precast slabs with an anti-sagging component. Background Technology

[0002] Precast slabs are a common building material that can be prefabricated in a factory and quickly installed on site. A precast slab typically consists of two or more panels, which can be identical or different. To ensure a secure connection between these panels, pre-embedded bolts are used to fasten them together. Pre-embedded bolts are bolts that are pre-installed inside concrete foundations or other components. During precast slab fabrication, holes are drilled at appropriate locations on each slab, and the corresponding pre-embedded bolts are inserted into the holes. The slabs are then placed on the foundation and secured together with bolts according to design requirements. Finally, concrete around the pre-embedded bolts is filled with cement or other materials to ensure a stable connection. During concrete pouring, the fluidity of the concrete can easily cause the bolts to sink or become misaligned, resulting in inaccurate bolt positioning and affecting the subsequent use of the precast slab. Therefore, it is necessary to research a precast slab fastening bolt with an anti-sinking component. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a fastening bolt for precast slabs with an anti-sinking component. Two bolts can be installed simultaneously using the anti-sinking component, which can provide a good fixing effect and prevent the bolts from falling to the lower limit or becoming skewed during concrete pouring.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A precast slab fastening bolt with an anti-sinking component, comprising a first bolt, a second bolt, and an anti-sinking component for fixing the first bolt and the second bolt to the precast slab, the anti-sinking component comprising: The base plate is located at the bottom of the precast slab mold; The fixed block is fixedly connected to the top of the base plate by two support rods. The fixed block has a first cavity, a second cavity and a third cavity arranged from top to bottom. The first pressure block and the second pressure block are slidably connected to the two sides of the first cavity, forming a first sealed cavity between the first pressure block and the second pressure block. The third pressure block and the push rod for pushing the third pressure block are slidably connected inside the second cavity. The third pressure block and the right side wall of the second cavity form a second sealed cavity. The second sealed cavity and the first sealed cavity are connected. A fixing component, disposed inside a fixing block, includes a first fixing pin and a second fixing pin. The first fixing pin and the second fixing pin are respectively connected to the outer sides of a first pressing block and a second pressing block. The movement of the first pressing block and the second pressing block can drive the movement of the first fixing pin and the second fixing pin to fix the first bolt and the second bolt.

[0005] Preferably, a first fixing rod and a second fixing rod for inserting the first bolt and the second bolt are fixedly provided on both sides of the top of the aforementioned fixing block. The first fixing rod and the second fixing rod are both provided with limiting channels that pass through both ends. The fixing block is provided with fixing holes that communicate with the two limiting channels on both sides of its interior. The two fixing holes are respectively connected to the two sides of the first cavity. The lower part of the first bolt and the second bolt are both provided with through holes that pass through both sides. The first pressing block drives the first fixing pin to move outward to the through hole into which the first bolt is inserted to fix the first bolt. The second pressing block drives the second fixing pin to move outward to the through hole into which the second bolt is inserted to fix the second bolt.

[0006] Preferably, both sides of the aforementioned fixing block are provided with fixing grooves that communicate with the outer wall of the limiting channel, and the first fixing pin and the second fixing pin pass through the through holes of the first bolt and the second bolt respectively and abut into the fixing groove.

[0007] Preferably, rotating blocks are fixedly connected to the outer walls of the first and second pressing blocks, and the inner ends of the first and second fixing pins are rotatably connected to the corresponding rotating blocks.

[0008] Preferably, the first cavity has openings at both ends, and mounting blocks are fixed on the inner walls of both sides of the openings. Sliding pins are provided on the mounting blocks. External thread grooves are provided on the outer walls of the first and second fixing pins. The sliding pins are slidably connected to the corresponding external thread grooves to realize the rotation of the first and second fixing pins. Internal threads corresponding to the external thread grooves are provided on the inner walls of the through holes of the first and second bolts. The first and second fixing pins rotate while moving outwards and are threadedly connected to the through holes of the first and second bolts.

[0009] Preferably, the outer end of the aforementioned push rod is connected to the left side wall of the second cavity via a first spring, and a positioning hole penetrating both ends is provided in the middle of the push rod.

[0010] Preferably, a positioning assembly is provided in the aforementioned third cavity. The positioning assembly includes a movable plate connected to the bottom wall of the third cavity via a second spring, protrusions vertically fixed to both sides of the top of the movable plate, and a positioning rod. A circular hole is provided at the bottom of the second cavity for the positioning rod to pass through. The top of the positioning rod passes through the circular hole at the bottom of the second cavity and the positioning hole of the push rod in sequence to fix the push rod and keep the second spring in a compressed state.

[0011] Preferably, the left end of the aforementioned third cavity is connected to the lower part of the fixing channel located on the left side, the protrusion is located at the lower part of the fixing channel, the first bolt is inserted into the fixing channel to press down the protrusion, compress the second spring, so as to drive the positioning rod to move down.

[0012] Preferably, the side walls of the aforementioned first and second fixing rods are provided with a plurality of drainage holes.

[0013] The advantages of this invention are as follows: When preparing precast slabs, the anti-sinking component can be used to simultaneously install two bolts, providing excellent fixation and preventing bolts from falling to their lower limit or becoming misaligned during concrete pouring. The first and second fixing pins can be inserted into the through holes of the first and second bolts respectively, rotating simultaneously during insertion. This allows the internal threads on the inner wall of the through holes to connect with the external thread grooves of the first and second fixing pins, thus better securing the first and second bolts and improving the stability of bolt installation. The anti-sinking component allows for the simultaneous fixing of two bolts, improving work efficiency and facilitating operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the anti-sinking component in this invention; Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle; Figure 4 This is a schematic diagram of the precast slab structure in this invention; Figure 5 This is a schematic diagram of the precast slab mold in this invention; The meanings of the reference numerals in the diagram are as follows: 1. First bolt; 2. Second bolt; 3. Precast slab; 4. Base plate; 5. Precast slab mold; 6. Fixing block; 6.1. First cavity; 6.11. First pressure block; 6.12. Second pressure block; 6.13. First sealed cavity; 6.14. First fixing pin; 6.141. External threaded groove; 6.15. Second fixing pin; 6.16. Rotating block; 6.17. Opening; 6.18. Mounting block, 6.19, sliding pin, 6.2, second cavity, 6.21, third pressure block, 6.22, push rod, 6.23, second sealed cavity, 6.3, third cavity, 6.31, second spring, 6.32, moving plate, 6.33, protrusion, 6.34, positioning rod, 6.4, fixing channel, 6.5, fixing groove, 7, support rod, 8, first fixing rod, 8.1, limiting channel, 9, second fixing rod. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0016] See Figures 1-5 The fastening bolts for the precast slab with anti-sinking components include a first bolt 1, a second bolt 2, and an anti-sinking component for fixing the first bolt 1 and the second bolt 2 to the precast slab 3.

[0017] The anti-sinking component includes: a base plate 4, which is elliptical in shape to better stabilize the base plate, and is set at the bottom of the precast slab mold 5. A rod is provided at the bottom of the mold 5, and a corresponding insertion hole is provided on one side of the base plate 4. During installation, the rod is inserted into the corresponding insertion hole to position and fix the base plate 4; a fixing block 6, which is fixedly connected to the top of the base plate 4 by two support rods 7. The interior of the fixing block 6 has, from top to bottom, a first cavity 6.1, a second cavity 6.2, and a third cavity 6.3. A first pressure block 6.11 and a second pressure block 6.12 are slidably connected to both sides of the first cavity 6.1, forming a first sealed cavity 6.13 between the first pressure block 6.11 and the second pressure block 6.12. A third pressure block 6.21 is slidably connected inside the second cavity 6.2, and a device for pushing the third pressure block is fixed therein. The push rod 6.22 of block 6.21 moves, and the third pressure block 6.21 forms a second sealed cavity 6.23 between the right side wall of the second cavity 6.2. The second sealed cavity 6.23 is connected to the first sealed cavity 6.13. The fixing assembly is set inside the fixing block 6 and includes a first fixing pin 6.14 and a second fixing pin 6.15. The first fixing pin 6.14 and the second fixing pin 6.15 are respectively connected to the outside of the first pressure block 6.11 and the second pressure block 6.12. Because the first sealed cavity 6.13 and the second sealed cavity 6.23 are connected, pushing the third pressure block 6.21 inward will cause the first pressure block 6.11 and the second pressure block 6.12 to be pushed outward, thereby driving the first fixing pin 6.14 and the second fixing pin 6.15 to move, so as to fix the first bolt 1 and the second bolt 2.

[0018] The top of the fixing block 6 is fixedly provided with a first fixing rod 8 and a second fixing rod 9 for inserting the first bolt 1 and the second bolt 2. The first fixing rod 8 and the second fixing rod 9 are both provided with limiting channels 8.1 that pass through both ends. The two sides of the inside of the fixing block 6 are respectively provided with fixing holes 6.4 that communicate with the two limiting channels 8.1. The two fixing holes 6.4 are respectively connected to the two sides of the first cavity 6.1. The lower part of the first bolt 1 and the second bolt 2 are both provided with through holes that pass through both sides. The first pressing block 6.11 drives the first fixing pin 6.14 to move outward to the through hole into which the first bolt 1 is inserted, so as to fix the first bolt 1. The second pressing block 6.12 drives the second fixing pin 6.15 to move outward to the through hole into which the second bolt 2 is inserted, so as to fix the second bolt 2.

[0019] The two sides inside the fixing block 6 are provided with fixing grooves 6.5 that are connected to the outer wall of the limiting channel 8.1. The first fixing pin 6.14 and the second fixing pin 6.15 pass through the through holes of the first bolt 1 and the second bolt 2 respectively and abut into the fixing grooves 6.5.

[0020] The first cavity 6.1 has openings 6.17 at both ends. Mounting blocks 6.18 are fixed to the inner walls of both sides of the openings 6.17. Sliding pins 6.19 are mounted on the mounting blocks 6.18. External threaded grooves 6.141 are provided on the outer walls of the first fixing pin 6.14 and the second fixing pin 6.15. The sliding pins 6.19 are slidably connected to the corresponding external threaded grooves 6.141 to allow rotation of the first fixing pin 6.14 and the second fixing pin 6.15. The first bolt 1 and... The inner wall of the through hole of the second bolt 2 is provided with an internal thread corresponding to the external thread groove 6.141. The outer walls of the first pressure block 6.11 and the second pressure block 6.12 are fixedly connected with rotating blocks 6.16. The inner ends of the first fixing pin 6.14 and the second fixing pin 6.15 are respectively rotatably connected to the corresponding rotating blocks 6.16. The first fixing pin 6.14 and the second fixing pin 6.15 can rotate in the rotating blocks 6.16 and are threadedly connected to the through holes of the first bolt 1 and the second bolt 2.

[0021] The outer end of the push rod 6.22 is connected to the left side wall of the second cavity 6.2 via a first spring. A positioning hole penetrating both ends is provided in the middle of the push rod 6.22. A positioning assembly is provided in the third cavity 6.3. The positioning assembly includes a movable plate 6.32 connected to the bottom wall of the third cavity 6.3 via a second spring 6.31, protrusions 6.33 vertically fixed to both sides of the top of the movable plate 6.32, and a positioning rod 6.34. A circular hole is provided at the bottom of the second cavity 6.2 for the positioning rod 6.34 to pass through. The top of the positioning rod 6.34 passes sequentially through the circular hole at the bottom of the second cavity 6.2 and the positioning hole of the push rod 6.22 to fix the push rod 6.22, thus compressing the second spring 6.31.

[0022] The left end of the third cavity 6.3 is connected to the lower part of the fixing channel 6.4 located on the left side. The protrusion 6.33 is located at the lower part of the fixing channel 6.4. The first bolt 1 is inserted into the fixing channel 6.4 to press down the protrusion 6.33 and compress the second spring 6.31, so as to drive the positioning rod 6.34 to move down.

[0023] Several perforations are provided on the side walls of the first fixing rod 8 and the second fixing rod 9, so that the concrete and the bolts can come into contact during concrete pouring, thereby better fixing the bolts.

[0024] To better illustrate the present invention, its working process is described in detail below: The anti-sinking component is placed in the precast slab 3 mold 5. A layer of concrete is poured first, covering the bottom slab 4, to fix the anti-sinking component and ensure the accuracy of the final bolt position. After the concrete dries and sets, the first bolt 1 and the second bolt 2 are inserted into the limiting channels 8.1 of the first fixing rod 8 and the second fixing rod 9. The bottom of the first bolt 1 presses down on the protrusion 6.33, compressing the second spring 6.31, which moves the positioning rod 6.34 down until it disengages from the push rod 6.22. The first spring returns to its elongated state under the action of elastic force, and the push rod 6... .22 pops out, pushing the third pressure block 6.21. The first pressure block 6.11 and the second pressure block 6.12 are pushed outward, causing the first fixing pin 6.14 and the second fixing pin 6.15 to move to both sides respectively. Because the sliding pin 6.19 is slidably connected in the corresponding external thread groove 6.141, the first fixing pin 6.14 and the second fixing pin 6.15 rotate at the same time as they move, so that they are threadedly connected in the through holes of the first bolt 1 and the second bolt 2, thereby fixing the first bolt 1 and the second bolt 2.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A fastening bolt for a precast slab with an anti-sinking component, comprising a first bolt (1), a second bolt (2), and an anti-sinking component for fixing the first bolt (1) and the second bolt (2) to the precast slab (3), characterized in that, The anti-sinking component includes: The base plate (4) is set at the bottom of the precast slab mold (5); A fixed block (6) is fixedly connected to the top of the base plate (4) by two support rods (7). The fixed block (6) has a first cavity (6.1), a second cavity (6.2) and a third cavity (6.3) arranged from top to bottom. A first pressure block (6.11) and a second pressure block (6.12) are slidably connected to the two sides of the first cavity (6.1). A first sealed cavity (6.13) is formed between the first pressure block (6.11) and the second pressure block (6.12). A third pressure block (6.21) and a push rod (6.22) for pushing the third pressure block (6.21) to move are slidably connected inside the second cavity (6.2). A second sealed cavity (6.23) is formed between the third pressure block (6.21) and the right side wall of the second cavity (6.2). The second sealed cavity (6.23) and the first sealed cavity (6.13) are connected. The fixing component is disposed inside the fixing block (6) and includes a first fixing pin (6.14) and a second fixing pin (6.15). The first fixing pin (6.14) and the second fixing pin (6.15) are respectively connected to the outside of the first pressure block (6.11) and the second pressure block (6.12). The movement of the first pressure block (6.11) and the second pressure block (6.12) can drive the first fixing pin (6.14) and the second fixing pin (6.15) to move, so as to fix the first bolt (1) and the second bolt (2). The outer end of the push rod (6.22) is connected to the left side wall of the second cavity (6.2) via a first spring. The middle part of the push rod (6.22) is provided with a positioning hole that passes through both ends of the push rod. The third cavity (6.3) is provided with a positioning assembly, which includes a movable plate (6.32) connected to the bottom wall of the third cavity (6.3) via a second spring (6.31), protrusions (6.33) vertically fixed to the top two sides of the movable plate (6.32), and a positioning rod (6.34). The bottom of the second cavity (6.2) is provided with a round hole for the positioning rod (6.34) to pass through. The top of the positioning rod (6.34) passes through the round hole at the bottom of the second cavity (6.2) and the positioning hole of the push rod (6.22) in sequence to fix the push rod (6.22) and keep the first spring in a compressed state. The top of the fixing block (6) is fixedly provided with a first fixing rod (8) and a second fixing rod (9) for inserting the first bolt (1) and the second bolt (2). The first fixing rod (8) and the second fixing rod (9) are both provided with limiting channels (8.1) that pass through both ends. The two sides of the inside of the fixing block (6) are respectively provided with fixing holes (6.4) that communicate with the two limiting channels (8.1). The two fixing holes (6.4) are respectively connected to the two sides of the first cavity (6.1). The left end of the third cavity (6.3) is connected to the lower part of the fixing hole (6.4) located on the left side. The protrusion (6.33) is located at the lower part of the fixing hole (6.4). The first bolt (1) is inserted into the fixing hole (6.4) and presses down the protrusion (6.33) to compress the second spring (6.31) so as to drive the positioning rod (6.34) to move down to disengage from the push rod (6.22).

2. The fastening bolt for a precast slab with an anti-sagging component according to claim 1, characterized in that, The lower part of the first bolt (1) and the second bolt (2) are provided with through holes through both sides. The first pressure block (6.11) drives the first fixing pin (6.14) to move outward to the through hole of the first bolt (1) to fix the first bolt (1). The second pressure block (6.12) drives the second fixing pin (6.15) to move outward to the through hole of the second bolt (2) to fix the second bolt (2).

3. The fastening bolt for a precast slab with an anti-sagging component according to claim 2, characterized in that, The fixing block (6) has fixing grooves (6.5) on both sides inside, which are connected to the limiting channel (8.1). The first fixing pin (6.14) and the second fixing pin (6.15) pass through the through holes of the first bolt (1) and the second bolt (2) respectively and abut into the fixing groove (6.5).

4. The fastening bolt for a precast slab with an anti-sagging component according to claim 2, characterized in that, A rotating block (6.16) is fixedly connected to the outer side wall of the first pressing block (6.11) and the second pressing block (6.12). The inner ends of the first fixing pin (6.14) and the second fixing pin (6.15) are respectively rotatably connected to the corresponding rotating block (6.16).

5. The fastening bolt for a precast slab with an anti-sagging component according to claim 4, characterized in that, The first cavity (6.1) has openings (6.17) at both ends. Mounting blocks (6.18) are fixed on the inner walls of both sides of the openings (6.17). Sliding pins (6.19) are provided on the mounting blocks (6.18). External thread grooves (6.141) are provided on the outer walls of the first fixing pin (6.14) and the second fixing pin (6.15). The sliding pin (6.19) is slidably connected to the corresponding external thread groove (6.141) to realize the rotation of the first fixing pin (6.14) and the second fixing pin (6.15). The inner walls of the through holes of the first bolt (1) and the second bolt (2) are provided with internal threads corresponding to the external thread grooves (6.141). The first fixing pin (6.14) and the second fixing pin (6.15) rotate while moving outward and are threadedly connected to the through holes of the first bolt (1) and the second bolt (2).

6. The fastening bolt for a precast slab with an anti-sagging component according to claim 2, characterized in that, Several leakage holes are provided on the side walls of the first fixing rod (8) and the second fixing rod (9).

Images