Suspension equipment and suspension method for bridge cast-in-place wet joint formwork

Abstract

The invention belongs to the technical field of road construction, and particularly relates to suspension equipment and a suspension method for a bridge cast-in-place wet joint formwork, the suspension equipment comprises a suspension plate, and two suspension rings are welded to the upper end of the suspension plate; and the fixing mechanism is used for fixing formworks with different lengths, the fixing mechanism comprises two sliding grooves symmetrically formed in the lower end of the suspension plate, a vertical plate is slidably connected into each sliding groove, and the lower end of each vertical plate is fixedly connected with a telescopic plate. According to the bridge cast-in-place wet joint formwork hanging device, the fixing mechanism is arranged, before hanging, a bridge cast-in-place wet joint formwork is placed below the two vertical plates, a first motor drives a threaded rod to rotate, the two vertical plates move away from each other or close to each other, the two sides of the formwork are fixed and locked through a plurality of first self-locking type clamping hooks on the two sides, and the two sides of the formwork are fixed and locked through a plurality of second self-locking type clamping hooks on the two sides; and the positions of hanging points on the two sides can be adjusted in real time according to the length of the formwork, the stability in the hanging process is improved, and the subsequent concrete pouring quality is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of road construction, and in particular relates to a suspension device and a suspension method for a cast-in-place wet joint formwork of a bridge. Background Art

[0002] The cast-in-place wet joint formwork of a bridge is an important tool for pouring wet joint concrete during bridge construction. It is usually made of materials such as steel plates and plywood, and needs to be customized according to the size and shape of the wet joint. During the cast-in-place construction of a bridge, due to the existence of multiple pouring sections, the joints between two adjacent pouring sections need to be accurately docked. The cast-in-place wet joint formwork is required to ensure that the joints of the bridge maintain the correct shape, avoid non-dense joints or position deviations, and at the same time, the cast-in-place wet joint formwork can effectively prevent concrete overflow, thereby keeping the joint area clean and ensuring the quality after pouring.

[0003] In order to facilitate construction operations, ensure the installation accuracy and stability of the formwork, and adapt to the characteristics of the bridge structure, it is often necessary to suspend the cast-in-place wet joint formwork during use. However, when the existing suspension devices suspend the cast-in-place wet joint formwork, the following technical problems often exist: 1. During the suspension process, the length of the formwork needs to be adjusted and replaced in real time according to the length of the joint. However, in the existing suspension devices, the suspension point positions cannot be adjusted in real time according to the length of the formwork, resulting in instability of the formwork during the suspension process, affecting the stability of the formwork after suspension, and further affecting the quality of subsequent concrete pouring; 2. During the concrete pouring process, it is necessary to vibrate it to ensure the density and strength of the concrete pouring. However, due to the different lengths of the formwork during use, and the existing vibrators cannot adjust the vibration range in real time according to the length of the formwork, resulting in the vibration range being too large or too small. When the length of the formwork is small and the vibration range is large, the concrete is easily over-perturbed, the coarse aggregate sinks under the action of gravity, while the cement paste and fine aggregate float, resulting in uneven distribution of the various components of the concrete and segregation phenomenon. When the length of the formwork is large and the vibration range is small, the concrete cannot be vibrated sufficiently, the internal air bubbles are difficult to be completely discharged, and the concrete in some areas cannot be filled evenly, thus resulting in defects such as honeycombing, pitting, and holes, affecting the stability, durability, and load-bearing capacity of the bridge structure. Summary of the Invention

[0004] The object of the present invention is to solve the problems raised in the above background art, and provide a suspension device and a suspension method for a cast-in-place wet joint formwork of a bridge, which can adjust the suspension point positions on both sides in real time according to the length of the formwork, and improve the stability during the suspension process.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A suspension device for the cast-in-place wet joint formwork of a bridge, comprising: A suspension plate, with two lifting rings welded to the upper end of the suspension plate; A fixing mechanism for fixing formworks of different lengths. The fixing mechanism includes two chutes symmetrically opened at the lower end of the suspension plate. A vertical plate is slidably connected in each chute. A telescopic plate is fixedly connected to the lower end of each vertical plate. A plurality of first self-locking hooks distributed in a linear array are fixedly connected to the lower end of each telescopic plate. A threaded rod is rotatably connected in the suspension plate. The parts of the threaded rod extending into the two chutes are provided with threads with opposite spiral directions. Each vertical plate is respectively threadedly connected to the threads on both sides of the threaded rod. One end of the suspension plate is fixedly connected to a first motor, and the output end of the first motor is fixedly connected to the threaded rod; A vibrating mechanism for vibrating the concrete during the pouring process. The vibrating mechanism includes a cross plate arranged between the two vertical plates. A second motor is fixedly connected to the lower end of the cross plate. A worm is fixedly connected to the output end of the second motor. A first gear is fixedly connected to the bottom end of the worm. A rotating rod is rotatably connected to the center position of the lower end of the cross plate. A vibrating block is arranged on the rotating rod. A toothed ring meshing with the first gear is fixedly connected to the rotating rod; A range adjustment mechanism for adjusting the vibrating range of the concrete according to the length of the formwork.

[0006] Preferably, the range adjustment mechanism includes a liquid storage cavity opened inside the cross plate. Two symmetrically arranged first piston blocks are hermetically slidably connected in the liquid storage cavity. A sliding rod is fixedly connected to the side wall of each of the two first piston blocks away from each other. The two sliding rods are respectively movably connected to the two vertical plates. A transmission cavity communicating with the liquid storage cavity is opened inside the rotating rod. A second piston block is hermetically slidably connected in the transmission cavity. An L-shaped rod is fixedly connected to the bottom end of the second piston block. A limiting groove is opened on the outer wall of the rotating rod. The L-shaped rod is slidably connected to the inner wall of the limiting groove. A push rod is slidably connected through the lower side of the rotating rod. The vibrating block is fixedly connected to the push rod. A first hinge seat is arranged at one end of the push rod away from the vibrating block. A second hinge seat is arranged at the part of the L-shaped rod extending outside the limiting groove. A connecting rod is hinged between the first hinge seat and the second hinge seat.

[0007] Preferably, a liquid storage space is formed between the transmission cavity and the liquid storage cavity, and the liquid storage space is filled with hydraulic oil.

[0008] Preferably, a height adjusting mechanism is further provided below the suspension plate for continuously adjusting the height of the vibrating block during the concrete pouring process. The height adjusting mechanism includes a support rod fixedly connected to the lower end of the cross plate. A transmission rod is rotatably connected through the support rod. A rack is fixedly connected to the lower end of the suspension plate. A second gear is fixedly connected to one end of the transmission rod close to the rack. The second gear meshes with the rack. A worm gear meshing with the worm is fixedly connected to the other end of the transmission rod away from the rack.

[0009] Preferably, side grooves are formed on one side of the two vertical plates close to the cross plate, and the two sliding rods are respectively slidably connected to the inner walls of the two side grooves in the vertical direction.

[0010] Preferably, a self-balancing mechanism is further provided on the suspension plate for automatically balancing the formwork when the formwork tilts. The self-balancing mechanism includes a strip-shaped groove formed on the upper end of the suspension plate. A counterweight block is slidably connected in the strip-shaped groove. Springs are provided between both ends of the counterweight block and the inner wall of the strip-shaped groove. First electromagnets are provided on both side walls of the counterweight block. Second electromagnets are provided on both inner walls of the strip-shaped groove. When the first electromagnets and the second electromagnets are energized, the same poles repel each other. A piezoresistor is provided on one side wall of each second electromagnet close to the counterweight block. The telescopic plate includes a fixed outer plate and a telescopic inner plate slidably connected to the bottom end of the fixed outer plate. A hydraulic cylinder is provided inside the telescopic plate. The output end of the hydraulic cylinder is fixedly connected to the telescopic inner plate. A PLC control panel is provided on the outer wall of one side of the suspension plate. The PLC control panel controls the telescopic degree of the hydraulic cylinder according to the circuit output signal of the circuit where the piezoresistor is located.

[0011] Preferably, a magnetic shielding cover is fixedly connected to the upper end of the suspension plate, and the counterweight block, the first electromagnet, the second electromagnet, the piezoresistor and the spring are all located inside the magnetic shielding cover.

[0012] A suspension method applied to the above suspension device includes the following steps: S1. Formwork fixation: Place the cast-in-place wet joint formwork of the bridge below the two vertical plates. Drive the threaded rod to rotate through the first motor, so that the two vertical plates move away from or close to each other until the distance between the two vertical plates is 20-30 mm greater than the length of the formwork. Fix and lock both sides of the formwork through a plurality of first self-locking hooks on both sides. S2. Vibration range adjustment: The distance between the two vertical plates can be adjusted according to the length of the formwork. When the formwork is longer, the distance between the two vertical plates is greater, driving the distance between the two first piston blocks to be greater. The hydraulic oil in the transmission cavity enters the liquid storage cavity, so that the relative distance between the vibrating block and the rotating rod is greater. When the formwork is longer, the vibration range of the vibrating block during rotation for the concrete is correspondingly increased. S3. Formwork Suspension: Lock and fix the two lifting rings on the suspension plate through the additionally provided second self-locking hook, and then use an electric hoist to lift the second self-locking hook, the suspension plate, and the formwork below the suspension plate, so that the formwork is suspended at the joint between two adjacent casting sections; S4. Vibration Treatment: Pour the concrete onto the formwork. During this process, start the second motor to drive the worm and the first gear to rotate. Further, under the action of the toothed ring, drive the rotating rod to rotate, so that the vibrating block can rotate to vibrate the concrete; S5. Vibration Height Adjustment: During the vibration process, the rotation of the worm will drive the transmission rod to rotate through the worm wheel. Furthermore, the second gear on the transmission rod will move upward along the rack, driving the cross plate to move upward in the vertical direction, so that the vibrating block can continuously move upward during the casting and vibration process; S6. Self-Balancing Treatment: During the casting process, when the suspension plate shakes slightly and drives the formwork to tilt slightly, the tilt of the suspension plate will cause the position of the counterweight block in the strip groove to change, controlling the expansion and contraction degree of the hydraulic cylinders in the two telescopic plates to change. When the suspension plate drives the formwork to tilt, the hydraulic cylinder on the downward-tilting side contracts, and the hydraulic cylinder on the upward-tilting side extends, so that the formwork can still remain horizontal when the suspension plate shakes and tilts.

[0013] Compared with the existing technology, the advantages of the suspension equipment and suspension method for the cast-in-place wet joint formwork of bridges are as follows: 1. By setting the fixing mechanism in the present invention, before suspension, place the cast-in-place wet joint formwork of the bridge below the two vertical plates, drive the threaded rod to rotate through the first motor, make the two vertical plates move away from or close to each other, and fix and lock the two sides of the formwork through multiple first self-locking hooks on both sides. The position of the hanging points on both sides can be adjusted in real time according to the length of the formwork, improving the stability during suspension and the subsequent concrete casting quality.

[0014] 2. By setting the vibration mechanism in the present invention, during the concrete casting process, start the second motor to drive the worm and the first gear to rotate. Further, under the action of the toothed ring, drive the rotating rod to rotate, so that the vibrating block can rotate to vibrate the concrete, thereby discharging the air bubbles inside the concrete, improving the density of the concrete, ensuring the close combination of the concrete and the bridge structure, and enhancing the integrity of the structure.

[0015] 3. By providing a range adjustment mechanism in the present invention, since the distance between the two vertical plates can be adjusted according to the length of the formwork, when the formwork is longer, the distance between the two vertical plates is larger, the distance between the two first piston blocks is greater, and the relative distance between the vibrating block and the rotating rod is larger. When the formwork is longer, the vibrating range of the vibrating block during rotation with respect to the concrete is correspondingly increased, avoiding the situation of either too large or too small vibrating range. This not only can fully vibrate the concrete and completely discharge the air bubbles in the concrete, but also can avoid excessive disturbance and prevent the occurrence of segregation phenomenon, improving the stability, durability and load-bearing capacity of the bridge structure.

[0016] 4. By providing a height adjustment mechanism in the present invention, during the vibration process, the rotation of the worm will drive the transmission rod to rotate through the worm wheel, driving the cross plate to move upward in the vertical direction, so that the vibrating block can continuously move upward during the casting and vibration process. As the concrete is continuously poured, the vibrating height of the vibrating block is continuously increased, further improving the compactness of the concrete casting.

[0017] 5. By providing a self-balancing mechanism in the present invention, during the pouring process, when the suspension plate shakes slightly and drives the formwork to tilt slightly, the tilt of the suspension plate will cause the position of the counterweight block in the strip-shaped groove to change, causing the hydraulic cylinder on the downward-tilting side to contract and the hydraulic cylinder on the upward-tilting side to extend, so that the formwork can still remain horizontal when the suspension plate shakes and tilts, thereby realizing the self-balancing treatment of the formwork and improving the quality of concrete casting and the docking quality of the bridge joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a three-dimensional structural schematic diagram of another angle of the present invention; Figure 3 is Figure 2 the enlarged view of part A in Figure 4 is a cross-sectional structural schematic diagram of the cross plate in the present invention; Figure 5 is a partial cross-sectional view of the suspension plate in the present invention; Figure 6 is Figure 5 the enlarged view of part B in Figure 7 is Figure 5 the enlarged view of part C in

[0019] In the figure: 1. Suspension plate; 11. Suspension ring; 2. Fixing mechanism; 21. Slide groove; 22. Vertical plate; 23. Telescopic plate; 24. First self-locking hook; 25. Threaded rod; 26. First motor; 3. Vibrating mechanism; 31. Cross plate; 32. Second motor; 33. Worm; 34. First gear; 35. Rotating rod; 36. Vibrating block; 37. Tooth ring; 4. Range adjustment mechanism; 41. Liquid storage cavity; 42. First piston block; 43. Slide rod; 44. Transmission cavity; 45. Second piston block; 46. L-shaped rod; 47. Limit groove; 48. Push rod; 49. First hinge seat; 410. Second hinge seat; 411. Connecting rod; 5. Height adjustment mechanism; 51. Support rod; 52. Transmission rod; 53. Rack; 54. Second gear; 55. Worm gear; 6. Side groove; 7. Self-balancing mechanism; 71. Strip-shaped groove; 72. Counterweight; 73. Spring; 74. First electromagnet; 75. Second electromagnet; 76. Pressure-sensitive resistor; 77. Fixed outer plate; 78. Telescopic inner plate; 79. Hydraulic cylinder; 710. PLC control panel; 8. Magnetic shielding cover. Detailed implementation manners

[0020] The following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0021] Embodiment: Refer to Figures 1 to 7 , a suspension device for the cast-in-place wet joint formwork of a bridge, comprising: A suspension plate 1, and two suspension rings 11 are welded to the upper end of the suspension plate 1; Specifically, two sets of electric hoists and second self-locking hooks (not marked in the figure) are additionally arranged above the suspension plate 1. The connection manner between the second self-locking hook and the suspension ring 11 is the same as the connection manner between the first self-locking hook 24 and the suspension point position on the side wall of the formwork, which will not be elaborated here. The electric hoist can be fixedly installed on two adjacent casting sections of the bridge structure through a support rod.

[0022] Specifically, the self-locking hook is made of high-strength steel and has a unique locking structure. The main body of the hook is "L"-shaped, with a rotatable locking tongue at one end, and anti-slip teeth on the locking tongue. When the hook catches the suspension point of the formwork, the locking tongue automatically rotates and fastens under the action of a spring, and the anti-slip teeth tightly bite with the surface of the formwork to prevent the hook from sliding. In terms of the fixing method, multiple first self-locking hooks 24 at the lower end of each telescopic plate 23 are evenly distributed, and the tightening force of the hook is adjusted according to the thickness and material of the formwork. For thinner formworks, a smaller tightening force is adopted to avoid damaging the formwork; for thicker and harder formworks, the tightening force is appropriately increased to ensure firm fixation.

[0023] Fixing mechanism 2 is used to fix templates of different lengths. The fixing mechanism 2 includes two sliding grooves 21 symmetrically opened at the lower end of the suspension plate 1. A vertical plate 22 is slidably connected in each sliding groove 21. A telescopic plate 23 is fixedly connected to the lower end of each vertical plate 22. A plurality of first self-locking hooks 24 distributed in a linear array are fixedly connected to the lower end of each telescopic plate 23. A threaded rod 25 is rotatably connected in the suspension plate 1. The part of the threaded rod 25 extending into the two sliding grooves 21 is provided with threads with opposite spiral directions. Each vertical plate 22 is respectively threadedly connected to the threads on both sides of the threaded rod 25. One end of the suspension plate 1 is fixedly connected with a first motor 26. The output end of the first motor 26 is fixedly connected to the threaded rod 25; Aiming at the problem in the prior art that the suspension point position cannot be adjusted in real time according to the length of the template, resulting in instability of the template during suspension, the present invention sets the fixing mechanism 2. Before suspension, the cast-in-place wet joint template of the bridge is placed below the two vertical plates 22. The first motor 26 is driven to rotate the threaded rod 25, so that the two vertical plates 22 move away from or close to each other. The two sides of the template are fixedly locked by a plurality of first self-locking hooks 24 on both sides, and the suspension point positions on both sides can be adjusted in real time according to the length of the template, improving the stability during suspension and the subsequent concrete pouring quality.

[0024] Vibrating mechanism 3 is used to vibrate the concrete during pouring. The vibrating mechanism 3 includes a cross plate 31 arranged between the two vertical plates 22. A second motor 32 is fixedly connected to the lower end of the cross plate 31. A worm 33 is fixedly connected to the output end of the second motor 32. A first gear 34 is fixedly connected to the bottom end of the worm 33. A rotating rod 35 is rotatably connected to the center position of the lower end of the cross plate 31. A vibrating block 36 is arranged on the rotating rod 35. A tooth ring 37 meshing with the first gear 34 is fixedly connected to the rotating rod 35; Specifically, by the transmission cooperation mode of the worm 33 and the worm wheel 55, the transmission efficiency can be reduced, so that when the rotating rod 35 rotates and vibrates, the rising speed of the cross plate 31 is slower, improving the stability of the equipment.

[0025] It is worth mentioning that the present invention sets the vibrating mechanism 3. During the concrete pouring process, the second motor 32 is turned on to drive the worm 33 and the first gear 34 to rotate. Further, under the action of the tooth ring 37, the rotating rod 35 is driven to rotate, so that the vibrating block 36 can rotate to vibrate the concrete, thereby discharging the air bubbles inside the concrete, improving the density of the concrete, ensuring the close combination of the concrete and the bridge structure, and enhancing the integrity of the structure.

[0026] Range adjustment mechanism 4 is used to adjust the vibration range for concrete according to the length of the formwork. The range adjustment mechanism 4 includes a liquid storage cavity 41 opened inside the cross plate 31. Two symmetrically arranged first piston blocks 42 are hermetically and slidably connected in the liquid storage cavity 41. On the side walls of the two first piston blocks 42 facing away from each other, sliding rods 43 are fixedly connected. The two sliding rods 43 are respectively movably connected to the two vertical plates 22. A transmission cavity 44 communicating with the liquid storage cavity 41 is opened inside the rotating rod 35. A second piston block 45 is hermetically and slidably connected in the transmission cavity 44. A bottom end of the second piston block 45 is fixedly connected with an L-shaped rod 46. A limiting groove 47 is opened on the outer wall of the rotating rod 35. The L-shaped rod 46 is slidably connected to the inner wall of the limiting groove 47. A push rod 48 is slidably connected through the lower side of the rotating rod 35. The vibrating block 36 is fixedly connected with the push rod 48. A first hinge seat 49 is arranged at one end of the push rod 48 away from the vibrating block 36. A second hinge seat 410 is arranged on the part of the L-shaped rod 46 extending outside the limiting groove 47. A connecting rod 411 is hinged between the first hinge seat 49 and the second hinge seat 410.

[0027] Specifically, a liquid storage space is formed between the transmission cavity 44 and the liquid storage cavity 41, and the liquid storage space is filled with hydraulic oil.

[0028] In view of the situation in the prior art that the vibrator cannot adjust the vibration range in real time according to the length of the formwork, resulting in the vibration range being too large or too small, the present invention sets the range adjustment mechanism 4. Since the distance between the two vertical plates 22 can be adjusted according to the length of the formwork, when the formwork is longer, the distance between the two vertical plates 22 is larger. The distance between the two first piston blocks 42 is driven by the sliding rod 43 to be larger, so that the hydraulic oil in the transmission cavity 44 can enter the liquid storage cavity 41. The second piston block 45 in the transmission cavity 44 drives the L-shaped rod 46 to displace a larger distance upward. Further, under the action of the first hinge seat 49, the second hinge seat 410 and the connecting rod 411, the relative distance between the vibrating block 36 and the rotating rod 35 is larger. When the formwork is longer, the vibration range of the vibrating block 36 during rotation for the concrete is correspondingly increased, so that the vibration range increases synchronously with the increase of the formwork length, avoiding the situation that the vibration range is too large or too small. It can not only vibrate the concrete sufficiently and completely discharge the air bubbles in the concrete, but also avoid excessive disturbance and prevent the occurrence of segregation phenomenon, improving the stability, durability and bearing capacity of the bridge structure.

[0029] A height adjustment mechanism 5 is further provided below the suspension plate 1 for continuously adjusting the height of the vibrating block 36 during the concrete pouring process. The height adjustment mechanism 5 includes a support rod 51 fixedly connected to the lower end of the cross plate 31. A transmission rod 52 is rotatably connected through the support rod 51. A rack 53 is fixedly connected to the lower end of the suspension plate 1. A second gear 54 is fixedly connected to one end of the transmission rod 52 close to the rack 53. The second gear 54 meshes with the rack 53. A worm gear 55 meshing with the worm 33 is fixedly connected to the other end of the transmission rod 52 away from the rack 53.

[0030] Specifically, side grooves 6 are opened on one side of each of the two vertical plates 22 close to the cross plate 31. The two sliding rods 43 are respectively slidably connected to the inner walls of the two side grooves 6 in the vertical direction. The side grooves 6 can limit the sliding rods 43, so that the cross plate 31 can only move vertically between the two vertical plates 22.

[0031] In order to further improve the density during the concrete pouring process, in the present invention, by setting the height adjustment mechanism 5, during the vibration process, the rotation of the worm 33 will drive the transmission rod 52 to rotate through the worm gear 55, and then the second gear 54 on the transmission rod 52 will move upward along the rack 53, driving the cross plate 31 to move upward in the vertical direction, so that the vibrating block 36 can continuously move upward during the pouring and vibrating process, and continuously improve the vibrating height of the vibrating block 36 as the concrete is continuously poured, further improving the density of the concrete pouring.

[0032] A self-balancing mechanism 7 is further provided on the suspension plate 1 for automatically balancing the formwork when the formwork tilts. The self-balancing mechanism 7 includes a strip-shaped groove 71 opened on the upper end of the suspension plate 1. A counterweight 72 is slidably connected in the strip-shaped groove 71. Springs 73 are provided between both ends of the counterweight 72 and the inner walls of the strip-shaped groove 71. First electromagnets 74 are provided on both side walls of the counterweight 72. Second electromagnets 75 are provided on both inner walls of the strip-shaped groove 71. When the first electromagnets 74 and the second electromagnets 75 are energized, the same poles repel each other. A pressure-sensitive resistor 76 is provided on one side wall of each second electromagnet 75 close to the counterweight 72. The telescopic plate 23 includes a fixed outer plate 77 and a telescopic inner plate 78 slidably connected to the bottom end of the fixed outer plate 77. A hydraulic cylinder 79 is provided inside the telescopic plate 23. The output end of the hydraulic cylinder 79 is fixedly connected to the telescopic inner plate 78. A PLC control panel 710 is provided on one outer wall of the suspension plate 1. The PLC control panel 710 controls the telescopic degree of the hydraulic cylinder 79 according to the circuit output signal of the circuit where the pressure-sensitive resistor 76 is located.

[0033] Specifically, a magnetic isolation cover 8 is fixedly connected to the upper end of the suspension plate 1, and the counterweight 72, the first electromagnet 74, the second electromagnet 75, the varistor 76 and the spring 73 are all located inside the magnetic isolation cover 8. Through the setting of the magnetic isolation cover 8, the external environment can be prevented from affecting the magnetic repulsion force between the first electromagnet 74 and the second electromagnet 75.

[0034] Specifically, the displacement of the template during the self-balancing process is always within the allowable deviation range during the concrete pouring process, preventing the adjustment of the template from affecting the construction.

[0035] Specifically, the magnitude of the electromagnet magnetic force is related to the magnitude of the current, the number of coil turns, the core material, etc. When other conditions remain unchanged, according to the Ampere force formula and the related theory of electromagnet magnetic force, when the first electromagnet 74 and the second electromagnet 75 approach each other, they will repel each other, and the closer the distance, the greater the repulsive force.

[0036] Specifically, when the magnetic repulsion between the first electromagnet 74 and the second electromagnet changes, the pressure on the piezoresistor 76 will change, and the resistance of the piezoresistor 76 will change accordingly, and the resistance change will be further converted into an electrical signal, so that the PLC control panel 710 can control the extension and retraction of the hydraulic cylinder 79 by controlling the electromagnetic reversing valve of the hydraulic cylinder 79. When the template is tilted, the first electromagnet 74 on one side will be close to the second electromagnet 75, the magnetic repulsion will increase, and the resistance of the piezoresistor 76 on this side will change. The circuit output signal controls the hydraulic cylinder 79 on this side to contract and pull up the lower side of the template. At the same time, the first electromagnet 74 on the other side moves away from the second electromagnet 75, and the change in the resistance of the piezoresistor 76 on the other side controls the extension of the hydraulic cylinder 79 on the other side to lower the higher side of the template, thereby achieving self-balancing of the template.

[0037] Furthermore, the PLC control panel 710 first collects and A / D converts the analog signal of the varistor 76, converts it into a digital signal, and then processes the digital signal through a preset proportional-integral-differential (PID) control algorithm. According to the processing result, the expansion and contraction amount of the hydraulic cylinder 79 to be controlled is calculated, and the control command is sent to the electromagnetic reversing valve of the hydraulic cylinder 79 through the output interface to achieve precise control of the expansion and contraction of the hydraulic cylinder 79. A threshold is set in the programming logic. When the template inclination angle is less than a certain threshold, the self-balancing adjustment is not started to avoid frequent adjustments due to small shaking affecting the stability of the system; when the inclination angle exceeds the threshold, the adjustment program is quickly started to ensure the stability of the template.

[0038] In addition, by setting the self-balancing mechanism 7, during the pouring process, when the suspension plate 1 shakes slightly and drives the formwork to tilt slightly, the tilt of the suspension plate 1 will cause the position of the counterweight 72 in the strip-shaped groove 71 to change, resulting in a change in the magnetic repulsive force between the first electromagnet 74 and the corresponding second electromagnet 75 on both sides of the counterweight 72, causing a change in the force exerted on the varistor 76 by the magnetic repulsive force, resulting in a change in the circuit output signal of the circuit where the varistor 76 is located, thereby controlling the telescopic degree of the hydraulic cylinders 79 in the two telescopic plates 23 to change. When the suspension plate 1 drives the formwork to tilt, the hydraulic cylinder 79 on the downward-tilting side contracts, while the hydraulic cylinder 79 on the upward-tilting side extends, enabling the formwork to remain horizontal when the suspension plate 1 shakes and tilts, thus achieving self-balancing treatment of the formwork and improving the quality of concrete pouring and the docking quality of bridge joints.

[0039] A suspension method applied to the above-mentioned suspension equipment includes the following steps: S1. Formwork fixation: Place the cast-in-place wet joint formwork of the bridge under the two vertical plates 22. Drive the threaded rod 25 to rotate through the first motor 26, so that the two vertical plates 22 move away from or close to each other until the distance between the two vertical plates 22 is 20 - 30 mm greater than the length of the formwork, and fix and lock both sides of the formwork through a plurality of first self-locking hooks 24 on both sides; S2. Vibration range adjustment: The distance between the two vertical plates 22 can be adjusted according to the length of the formwork. When the formwork is longer, the distance between the two vertical plates 22 is greater, driving the distance between the two first piston blocks 42 to be greater, and the hydraulic oil in the transmission cavity 44 enters the liquid storage cavity 41, making the relative distance between the vibrating block 36 and the rotating rod 35 greater, and correspondingly increasing the vibration range of the vibrating block 36 during rotation for the concrete when the formwork is longer; S3. Formwork suspension: Lock and fix the two lifting rings 11 on the suspension plate 1 through the additionally provided second self-locking hooks, and then lift the second self-locking hooks, the suspension plate 1, and the formwork below the suspension plate 1 through an electric hoist, so that the formwork is suspended at the joint between two adjacent pouring sections; S4. Vibration treatment: Pour the concrete onto the formwork. During this process, start the second motor 32 to drive the worm 33 and the first gear 34 to rotate, and further drive the rotating rod 35 to rotate under the action of the toothed ring 37, so that the vibrating block 36 can rotate to vibrate the concrete; S5. Vibration height adjustment: During the vibration process, the rotation of the worm 33 will drive the transmission rod 52 to rotate through the worm wheel 55, and then the second gear 54 on the transmission rod 52 will move upward along the rack 53, driving the cross plate 31 to move upward in the vertical direction, so that the vibrating block 36 can continuously move upward during the pouring and vibration process; S6. Self-balancing process: During the pouring process, when the suspension plate 1 shakes slightly and causes the formwork to tilt slightly, the tilt of the suspension plate 1 will change the position of the counterweight block 72 in the strip groove 71, controlling the telescopic degree of the hydraulic cylinder 79 in the telescopic plates 23 on both sides. When the suspension plate 1 causes the formwork to tilt, the hydraulic cylinder 79 on the downward tilting side contracts, while the hydraulic cylinder 79 on the upward tilting side extends, so that the formwork can still remain level when the suspension plate 1 shakes and tilts.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A suspension device for cast-in-place wet joint formwork for bridges, characterized in that: include: A suspension plate (1), wherein two suspension rings (11) are welded to the upper end of the suspension plate (1); A fixing mechanism (2) is used to fix templates of different lengths, the fixing mechanism (2) comprising two slide grooves (21) symmetrically opened at the lower end of the suspension plate (1), each of the slide grooves (21) is slidably connected to a vertical plate (22), the lower end of each vertical plate (22) is fixedly connected to a telescopic plate (23), the lower end of each telescopic plate (23) is fixedly connected to a plurality of first self-locking hooks (24) distributed in a linear array, a threaded rod (25) is rotatably connected to the suspension plate (1), the portion of the threaded rod (25) extending into the two slide grooves (21) is provided with threads with opposite spiral directions, each of the vertical plates (22) is respectively threadedly connected to threads on both sides of the threaded rod (25), one end of the suspension plate (1) is fixedly connected to a first motor (26), the output end of the first motor (26) is fixedly connected to the threaded rod (25); A vibrating mechanism (3) for vibrating concrete during the pouring process, the vibrating mechanism (3) comprising a horizontal plate (31) arranged between two vertical plates (22), the lower end of the horizontal plate (31) being fixedly connected to a second motor (32), the output end of the second motor (32) being fixedly connected to a worm (33), the bottom end of the worm (33) being fixedly connected to a first gear (34), a rotating rod (35) being rotatably connected to the center position of the lower end of the horizontal plate (31), a vibrating block (36) being arranged on the rotating rod (35), and a toothed ring (37) meshing with the first gear (34) being fixedly connected to the rotating rod (35); The range adjustment mechanism (4) is used to adjust the vibration range of the concrete according to the length of the template.

2. The suspension device for cast-in-place wet joint formwork for bridges according to claim 1, characterized in that: The range adjustment mechanism (4) comprises a liquid storage chamber (41) provided inside the transverse plate (31), two symmetrically arranged first piston blocks (42) being airtightly slidably connected inside the liquid storage chamber (41), a sliding rod (43) being fixedly connected to one side wall of the two first piston blocks (42) which are away from each other, the two sliding rods (43) being movably connected to the two vertical plates (22) respectively, a transmission chamber (44) communicating with the liquid storage chamber (41) being provided inside the rotating rod (35), a second piston block (45) being airtightly slidably connected inside the transmission chamber (44), the bottom end of the second piston block (45) being fixedly connected to An L-shaped rod (46) is provided, a limiting groove (47) is provided on the outer wall of the rotating rod (35), the L-shaped rod (46) is slidably connected to the inner wall of the limiting groove (47), a push rod (48) is slidably connected to the lower side of the rotating rod (35), the vibrating block (36) is fixedly connected to the push rod (48), a first hinge seat (49) is provided at one end of the push rod (48) away from the vibrating block (36), a second hinge seat (410) is provided at the portion of the L-shaped rod (46) extending outside the limiting groove (47), and a connecting rod (411) is hingedly connected between the first hinge seat (49) and the second hinge seat (410).

3. The suspension device for the cast-in-place wet joint formwork for bridges according to claim 2, characterized in that: A liquid storage space is formed between the transmission chamber (44) and the liquid storage chamber (41), and the liquid storage space is filled with hydraulic oil.

4. The suspension device for cast-in-place wet joint formwork for bridges according to claim 2, characterized in that: A height adjustment mechanism (5) is also provided below the suspension plate (1) for continuously adjusting the height of the vibrating block (36) during the concrete pouring process. The height adjustment mechanism (5) comprises a support rod (51) fixedly connected to the lower end of the horizontal plate (31), a transmission rod (52) passing through the support rod (51) and rotatably connected thereto, a rack (53) being fixedly connected to the lower end of the suspension plate (1), an end of the transmission rod (52) close to the rack (53) being fixedly connected to a second gear (54), the second gear (54) and the rack (53) being meshed with each other, and a worm wheel (55) meshing with the worm (33) being fixedly connected to the end of the transmission rod (52) away from the rack (53).

5. The suspension device for the cast-in-place wet joint formwork for bridges according to claim 4, characterized in that: A side groove (6) is provided on one side of the two vertical plates (22) close to the horizontal plate (31), and the two sliding rods (43) are respectively slidably connected to the inner walls of the two side grooves (6) along the vertical direction.

6. The suspension device for cast-in-place wet joint formwork for bridges according to claim 1, characterized in that: The suspension plate (1) is also provided with a self-balancing mechanism (7) for automatically balancing the template when the template is tilted. The self-balancing mechanism (7) comprises a strip groove (71) opened at the upper end of the suspension plate (1), a counterweight block (72) is slidably connected in the strip groove (71), springs (73) are provided between the two ends of the counterweight block (72) and the inner wall of the strip groove (71), first electromagnets (74) are provided on both side walls of the counterweight block (72), and second electromagnets (75) are provided on both side inner walls of the strip groove (71), and the first electromagnet (74) and the second electromagnet (75) repel each other with the same poles when electricity is supplied. A piezoresistor (76) is provided on a side wall of each second electromagnet (75) close to the counterweight (72); the telescopic plate (23) comprises a fixed outer plate (77) and a telescopic inner plate (78) slidably connected to the bottom end of the fixed outer plate (77); a hydraulic cylinder (79) is provided inside the telescopic plate (23); an output end of the hydraulic cylinder (79) is fixedly connected to the telescopic inner plate (78); a PLC control panel (710) is provided on an outer wall of one side of the suspension plate (1); the PLC control panel (710) controls the telescopic degree of the hydraulic cylinder (79) according to a circuit output signal of the circuit where the piezoresistor (76) is located.

7. The suspension device for the cast-in-place wet joint formwork for bridges according to claim 6, characterized in that: The upper end of the suspension plate (1) is fixedly connected to a magnetic shield (8), and the counterweight (72), the first electromagnet (74), the second electromagnet (75), the varistor (76) and the spring (73) are all located inside the magnetic shield (8).

8. A suspension method using the suspension device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Formwork fixing: placing the bridge cast-in-place wet joint formwork under two vertical plates (22), driving the threaded rod (25) to rotate by a first motor (26), so that the two vertical plates (22) move away from or toward each other until the distance between the two vertical plates (22) is greater than the length of the formwork by 20-30 mm, and fixing and locking the two sides of the formwork by a plurality of first self-locking hooks (24) on both sides; S2. Adjustment of vibration range: the distance between the two vertical plates (22) can be adjusted according to the length of the template. When the template is longer, the distance between the two vertical plates (22) is larger, which drives the distance between the two first piston blocks (42) to be larger, so that the hydraulic oil in the transmission chamber (44) can enter the liquid storage chamber (41), so that the relative distance between the vibration block (36) and the rotating rod (35) is larger. When the template is longer, the vibration range of the concrete when the vibration block (36) rotates is correspondingly increased; S3, formwork suspension: two lifting rings (11) on the suspension plate (1) are locked and fixed by a second self-locking hook provided separately, and then the second self-locking hook, the suspension plate (1) and the formwork below the suspension plate (1) are lifted by an electric hoist, so that the formwork is suspended to the joint between two adjacent casting sections; S4, vibrating treatment: pouring concrete onto the formwork, during which the second motor (32) is turned on to drive the worm (33) and the first gear (34) to rotate, and further, under the action of the gear ring (37), the rotating rod (35) is driven to rotate, so that the vibrating block (36) can rotate to vibrate the concrete; S5. Vibration height adjustment: During the vibration process, the rotation of the worm (33) drives the transmission rod (52) to rotate through the worm wheel (55), thereby causing the second gear (54) on the transmission rod (52) to move upward along the rack (53), driving the cross plate (31) to move upward in the vertical direction, so that the vibration block (36) can be continuously moved upward during the pouring and vibration process; S6. Self-balancing treatment: During the pouring process, when the suspension plate (1) slightly shakes and causes the template to tilt slightly, the tilt of the suspension plate (1) causes the position of the counterweight (72) in the strip groove (71) to change, thereby controlling the telescopic degree of the hydraulic cylinders (79) in the telescopic plates (23) on both sides to change. When the suspension plate (1) causes the template to tilt, the hydraulic cylinder (79) on the side tilting downward contracts, while the hydraulic cylinder (79) on the side tilting upward extends, so that the template can still remain horizontal when the suspension plate (1) shakes and tilts.

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