A large-circulation grouting device for precast beam and slab

Abstract

The present invention relates to the technical field of grouting for precast beam and slab, and specifically relates to a large-circulation grouting device for precast beam and slab, which includes a base and a grouting pipeline. A slurry bucket is fixedly connected to the upper end of the base, a cross plate is fixedly connected to the side wall of the slurry bucket, and a circulating grouting mechanism is installed on the base; the circulating grouting mechanism includes a rotating shaft rotatably connected to the side wall of the slurry bucket, two swing frames are symmetrically and fixedly connected to the side wall of the rotating shaft, a vertical shaft is rotatably connected to the lower end of the cross plate, an inclined rod is fixedly connected to the side wall of the vertical shaft, a chute is opened on the side wall of the inclined rod, an adjusting rod is hermetically slidably connected to the inner wall of the chute, and a connecting rod is fixedly connected to the lower end of the adjusting rod. The present invention can perform circulating grouting on the ducts of precast beam and slab, and the grouting pipeline can swing, continuously stirring and extruding the slurry in the ducts of precast beam and slab, thereby reducing the gaps between the slurries and compacting the slurry, avoiding the filled slurry being too loose and resulting in weak strength.

Description

Technical Field

[0001] The present invention relates to the technical field of grouting for precast beam slabs, and in particular to a large-circulation grouting device for precast beam slabs. Background Art

[0002] At present, in bridge design, in order to ensure the maximum spanning capacity of the bridge, more and more long-span bridge designs are adopted. To ensure the safety of the bridge, prestress is applied to many structures to eliminate adverse bending moments, so that the structure is in a better stress state. In particular, prestress must be applied during the construction of precast beam slabs of bridges.

[0003] When the existing precast beam slabs are under construction, it is necessary to grout the inside of their ducts to reduce prestress and ensure the service life of the bridge. When grouting the ducts of precast beam slabs, the slurry is directly poured into the ducts. This method will make the slurry loose inside the ducts, and then the strength of the solidified slurry is poor. Moreover, there is a lot of air between the slurries, and there will be many pores on the surface of the solidified slurry, further weakening the structural strength of the slurry block.

[0004] Based on this, we propose a large-circulation grouting device for precast beam slabs. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art, and to propose a large-circulation grouting device for precast beam slabs.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A large-circulation grouting device for precast beam slabs includes a base and a grouting pipeline. A slurry bucket is fixedly connected to the upper end of the base. A cross plate is fixedly connected to the side wall of the slurry bucket. A circulating grouting mechanism is installed on the base.

[0008] The circulating grouting mechanism includes a rotating shaft rotatably connected to the side wall of the slurry bucket. Two swing frames are symmetrically and fixedly connected to the side wall of the rotating shaft. A vertical shaft is rotatably connected to the lower end of the cross plate. An inclined rod is fixedly connected to the side wall of the vertical shaft. A chute is opened on the side wall of the inclined rod. An adjusting rod is hermetically slidably connected to the inner wall of the chute. A connecting rod is fixedly connected to the lower end of the adjusting rod. An arc-shaped frame is rotatably connected between the two swing frames. The lower end of the connecting rod is rotatably connected to the upper end of the arc-shaped frame. An inlet pipe and a return pipe are respectively fixedly connected to the lower ends of the two swing frames. One end of the return pipe is communicated with the slurry bucket. A plurality of discharge holes are opened on the side wall of the grouting pipeline.

[0009] Preferably, the circulating grouting mechanism further includes a grouting pump fixedly connected to the upper end of the base. The grouting pump is communicated with the inlet pipe through a pump slurry pipe. The grouting pump is communicated with the slurry bucket through a pumping slurry pipe.

[0010] Preferably, a rotating rod is rotatably connected to the inner top of the slurry bucket, and a plurality of stirring blades are fixedly connected to the side wall of the rotating rod.

[0011] Preferably, a placing table is installed on the base, an installation frame is fixedly connected to the upper end of the base, an electric push rod is fixedly connected to the upper end of the installation frame, and the movable end of the electric push rod penetrates through the inner top of the installation frame and is fixedly connected to a pressing plate.

[0012] Preferably, a driving mechanism is installed on the electric push rod. The driving mechanism includes a metal bracket fixedly connected to the upper end of the electric push rod, a motor is fixedly connected to the side wall of the metal bracket, the output end of the motor penetrates through the upper end of the slurry bucket and is fixedly connected to the rotating rod, a driving wheel is fixedly connected to the side wall of the output end of the motor, the upper end of the vertical shaft penetrates through the upper end of the horizontal plate and is fixedly connected to a driven wheel, and the driving wheel is connected to the driven wheel through a synchronous belt.

[0013] Preferably, a gas pumping mechanism is installed on the base. The gas pumping mechanism includes two gas pumping cylinders symmetrically and fixedly connected to the upper end of the base through a fixed axis. A sliding plug is hermetically and slidably connected to the inner wall of each of the two gas pumping cylinders. A vertical rod is rotatably connected to the lower end of the sliding plug, and the lower end of the vertical rod is rotatably connected to a swing frame. A one-way air inlet pipe is fixedly connected to the side wall of the gas pumping cylinder, and the gas pumping cylinder is communicated with the feed pipe through a one-way air outlet pipe.

[0014] Preferably, an adjusting mechanism is installed in the vertical shaft. The adjusting mechanism includes a vertical groove opened in the vertical shaft. The vertical groove is communicated with the sliding groove through a communication hole. The vertical groove and the sliding groove are filled with hydraulic oil. A rotary joint is fixedly connected to the upper end of the horizontal plate through a fixed axis. The upper end of the vertical shaft is fixedly connected to the rotary joint, and an oil inlet pipe is fixedly connected to the upper end of the rotary joint.

[0015] Preferably, the adjusting mechanism further includes an adjusting box fixedly connected to the upper end of the base through a fixed axis. A sliding plate is hermetically and slidably connected to the inner wall of the adjusting box. A fuel tank is fixedly connected to the upper end of the base. The adjusting box is communicated with the oil inlet pipe through a first one-way oil suction pipe. The adjusting box is communicated with the fuel tank through a first one-way oil discharge pipe. First solenoid valves are installed on the inner walls of the first one-way oil suction pipe and the first one-way oil discharge pipe. The fuel tank is communicated with the adjusting box through a second one-way oil suction pipe. The adjusting box is communicated with the oil inlet pipe through a second one-way oil discharge pipe. Second solenoid valves are installed on the inner walls of the second one-way oil suction pipe and the second one-way oil discharge pipe. A sliding block is slidably connected to the inner wall of the adjusting box. Two push rods are symmetrically and fixedly connected to the side wall of the sliding block. The other ends of the two push rods are fixedly connected to the side wall of the sliding plug. A lead screw is rotatably connected to the inner wall of the adjusting box. The side wall of the lead screw is threadedly connected to the sliding block. One end of the lead screw penetrates through the side wall of the adjusting box and is fixedly connected to a rotating shaft.

[0016] Preferably, four sealing air bags are fixedly connected to the side wall of the grouting pipeline.

[0017] Preferably, a grouting pipe is fixedly connected to the upper end of the slurry bucket.

[0018] Compared with the existing technology, the advantages of the present invention are as follows:

[0019] 1. By setting up a circulating grouting mechanism, the precast beam and slab ducts can be grouted in a cycle, and the grouting pipeline can swing, continuously stirring and extruding the slurry in the precast beam and slab ducts, thereby reducing the gaps between the slurries, compacting the slurries, and avoiding the filled slurries from being too loose, resulting in weak strength.

[0020] 2. By setting up a pump air mechanism, during the process of the swing frame reciprocating forward and backward, the two vertical rods can be driven to reciprocate up and down, and the movement directions of the two vertical rods are opposite, so that the two sliding plugs can be driven to reciprocate up and down for sealing sliding. Under the action of the sliding plugs, the external hot air will be drawn into the pump air cylinder through the one-way air inlet pipe, and then the hot air in the pump air cylinder will enter the feed pipe through the one-way air outlet pipe to heat the slurry flowing through the feed pipe, increasing the fluidity of the slurry, enabling it to flow more quickly in the grouting pipeline, and avoiding blockage in the grouting pipeline due to poor fluidity of the slurry, reducing the grouting efficiency.

[0021] 3. By setting up an adjustment mechanism, before the grouting starts, the first solenoid valve is energized to open it, and the second solenoid valve is de-energized to close it. Since the swingable space of the grouting pipeline will gradually decrease as the slurry in the precast beam and slab ducts increases, during the grouting process, the reciprocating forward and backward rotation of the rotating shaft can drive the lead screw to reciprocate forward and backward, and then drive the slider to reciprocate in the adjustment box. The slider will drive the slide plate to reciprocate for sealing sliding through the push rod. Then, the hydraulic oil in the vertical groove and the chute will be drawn into the adjustment box through the oil inlet pipe and the first one-way oil suction pipe, and then the hydraulic oil in the adjustment box will enter the storage oil tank through the first one-way oil discharge pipe for storage. As the hydraulic oil in the chute gradually decreases, the adjustment rod will move towards the direction close to the vertical shaft, and then drive the arc-shaped frame to rotate towards the direction close to the vertical shaft, reducing the inclination angle of the arc-shaped frame, and further reducing the forward and backward rotation angles of the two swing frames, so that the swing amplitude of the grouting pipeline in the precast beam and slab ducts gradually decreases, thus adapting to the increasing slurry in the precast beam and slab ducts, and avoiding the grouting pipeline from being deformed by extrusion, affecting normal grouting.

[0022] 4. By setting up a motor and a metal bracket, during the entire operation of the motor, it will vibrate due to the load itself. The vibration will be transmitted to the electric push rod through the metal bracket, and then to the pressure plate, and finally to the precast beam and slab, enabling the precast beam and slab to vibrate during grouting, which can further eliminate the air bubbles inside the slurry in the precast beam and slab ducts and improve the grouting effect.

[0023] 5. By setting up an installation frame, an electric push rod and a pressing plate, placing the precast beam slab on the upper end of the placing table, driving the electric push rod to extend, and driving the pressing plate to move downward to press and fix the precast beam slab, the stability of the precast beam slab during grouting can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 1 is a schematic perspective view of a large-circulation grouting device for precast beam slabs proposed by the present invention;

[0025] Figure 2 is Figure 1 a rear view schematic diagram of the structure in FIG. 1;

[0026] Figure 3 is Figure 1 a sectional view schematic diagram of the structure in FIG. 1;

[0027] Figure 4 is Figure 2 a sectional view schematic diagram of the structure in FIG. 1;

[0028] Figure 5 is Figure 3 an enlarged schematic diagram of structure A in FIG. 1;

[0029] Figure 6 is Figure 3 an enlarged schematic diagram of structure B in FIG. 1;

[0030] Figure 7 is Figure 3 an enlarged schematic diagram of structure C in FIG. 1;

[0031] Figure 8 is Figure 1 a schematic diagram of the structure of the circulating grouting mechanism in FIG. 1.

[0032] In the figure: 1, base; 2, slurry bucket; 3, rotating shaft; 4, swing frame; 5, horizontal plate; 6, vertical shaft; 7, inclined rod; 8, chute; 9, adjusting rod; 10, connecting rod; 11, arc-shaped frame; 13, feed pipe; 14, return pipe; 15, grouting pump; 16, pump slurry pipe; 17, pumping slurry pipe; 18, rotating rod; 19, stirring blade; 20, placing table; 21, mounting frame; 22, electric push rod; 23, pressing plate; 24, metal support; 25, motor; 26, driving wheel; 27, driven wheel; 28, air pump cylinder; 29, sliding plug; 30, vertical rod; 31, one-way intake pipe; 32, one-way exhaust pipe; 33, vertical chute; 34, communication hole; 35, rotary joint; 36, adjusting box; 37, sliding plate; 38, oil storage tank; 39, first one-way oil extraction pipe; 40, first one-way oil discharge pipe; 41, first solenoid valve; 42, second one-way oil extraction pipe; 43, second one-way oil discharge pipe; 44, second solenoid valve; 45, slider; 46, push rod; 47, lead screw; 48, discharge hole; 49, sealing air bag; 50, grouting pipe; 51, grouting pipeline; 52, oil inlet pipe. Detailed implementation mode

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Refer to Figure 1 - Figure 7 , a large-circulation grouting device for precast beam slabs, including a base 1 and a grouting pipeline 51. A slurry bucket 2 is fixedly connected to the upper end of the base 1, a horizontal plate 5 is fixedly connected to the side wall of the slurry bucket 2, and a circulating grouting mechanism is installed on the base 1;

[0035] The circulating grouting mechanism includes a rotating shaft 3 rotatably connected to the side wall of the slurry bucket 2. Two swing frames 4 are symmetrically and fixedly connected to the side wall of the rotating shaft 3. A vertical shaft 6 is rotatably connected to the lower end of the horizontal plate 5. An inclined rod 7 is fixedly connected to the side wall of the vertical shaft 6. A chute 8 is opened on the side wall of the inclined rod 7. An adjusting rod 9 is hermetically slidably connected to the inner wall of the chute 8. A connecting rod 10 is fixedly connected to the lower end of the adjusting rod 9. An arc-shaped frame 11 is rotatably connected between the two swing frames 4. The lower end of the connecting rod 10 is rotatably connected to the upper end of the arc-shaped frame 11. An inlet pipe 13 and a return pipe 14 are respectively fixedly connected to the lower ends of the two swing frames 4. One end of the return pipe 14 communicates with the slurry bucket 2. A plurality of discharge holes 48 are opened on the side wall of the grouting pipeline 51.

[0036] It should be noted that the part of the return pipe 14 connected to the swing frame 4 is made of a rigid pipe, and the rest is made of a flexible pipe.

[0037] The cyclic grouting mechanism further includes a grouting pump 15 fixedly connected to the upper end of the base 1. The grouting pump 15 is communicated with the feeding pipe 13 through a pump slurry pipe 16. The pump slurry pipe 16 is made of a flexible hose. The grouting pump 15 is communicated with the slurry bucket 2 through a pumping slurry pipe 17.

[0038] A rotating rod 18 is rotatably connected to the inner top of the slurry bucket 2. A plurality of stirring blades 19 are fixedly connected to the side wall of the rotating rod 18.

[0039] A placing table 20 is installed on the base 1. An installation frame 21 is fixedly connected to the upper end of the base 1. An electric push rod 22 is fixedly connected to the upper end of the installation frame 21. The movable end of the electric push rod 22 penetrates through the inner top of the installation frame 21 and is fixedly connected to a pressing plate 23.

[0040] Further, place the precast beam slab on the upper end of the placing table 20, drive the electric push rod 22 to extend, drive the pressing plate 23 to move downward to press and fix the precast beam slab, which can ensure the stability of the precast beam slab during grouting.

[0041] A driving mechanism is installed on the electric push rod 22. The driving mechanism includes a metal bracket 24 fixedly connected to the upper end of the electric push rod 22. A motor 25 is fixedly connected to the side wall of the metal bracket 24. The output end of the motor 25 penetrates through the upper end of the slurry bucket 2 and is fixedly connected to the rotating rod 18. A driving wheel 26 is fixedly connected to the side wall of the output end of the motor 25. The upper end of the vertical shaft 6 penetrates through the upper end of the horizontal plate 5 and is fixedly connected to a driven wheel 27. The driving wheel 26 is connected to the driven wheel 27 through a synchronous belt.

[0042] It is worth mentioning that during the entire operation of the motor 25, it will vibrate due to the load itself. The vibration will be transmitted to the electric push rod 22 through the metal bracket 24, then the vibration will be transmitted to the pressing plate 23, and finally transmitted to the precast beam slab, so that the precast beam slab can vibrate during grouting, which can further eliminate the air bubbles inside the slurry in the ducts of the precast beam slab and improve the grouting effect.

[0043] Furthermore, during the grouting process, the rotation of the motor 25 will synchronously drive the rotation of the driving wheel 26, which in turn drives the rotation of the driven wheel 27, driving the vertical shaft 6 to rotate. The vertical shaft 6 will drive the inclined rod 7 and the adjusting rod 9 to rotate, and then drive the connecting rod 10 to rotate, driving the arc-shaped frame 11 to rotate. Since the arc-shaped frame 11 is inclined and rotatably connected to the swing frame 4, the arc-shaped frame 11 will drive the swing frames 4 on both sides to rotate in a reciprocating manner in both forward and reverse directions with the axis of the rotating shaft 3 as the rotation axis during the rotation process. This can drive the feed pipe 13 and the return pipe 14 to rotate in a reciprocating manner in both forward and reverse directions, causing the grouting pipeline 51 to rotate reciprocally. The grouting pipeline 51 will form a swinging shape in the duct of the precast beam and slab, continuously stirring and extruding the slurry in the duct of the precast beam and slab, thereby reducing the gap between the slurries, compacting the slurry, preventing the filled slurry from being too loose and resulting in weak strength. At the same time, squeezing the slurry can also squeeze out the air inside it, eliminating the air bubbles inside the slurry, and further enhancing the strength of the slurry after solidification.

[0044] A pneumatic pumping mechanism is installed on the base 1. The pneumatic pumping mechanism includes two pneumatic pumping cylinders 28 symmetrically and fixedly connected to the upper end of the base 1 through a fixed axis. The inner walls of the two pneumatic pumping cylinders 28 are both hermetically and slidably connected with sliding plugs 29. The lower end of the sliding plug 29 is rotatably connected to a vertical rod 30, and the lower end of the vertical rod 30 is rotatably connected to the swing frame 4. The side wall of the pneumatic pumping cylinder 28 is fixedly connected with a one-way intake pipe 31, and the one-way intake pipe 31 is communicated with a container storing hot gas outside, and the one-way intake pipe 31 only allows the external hot gas to enter the pneumatic pumping cylinder 28. The pneumatic pumping cylinder 28 is communicated with the feed pipe 13 through a one-way outlet pipe 32, and the one-way outlet pipe 32 only allows the hot gas in the pneumatic pumping cylinder 28 to enter the feed pipe 13.

[0045] Furthermore, during the reciprocating rotation of the swing frame 4, it can drive the two vertical rods 30 to move up and down reciprocally, and the movement directions of the two vertical rods 30 are opposite, so as to drive the two sliding plugs 29 to slide up and down hermetically reciprocally. Under the action of the sliding plug 29, the external hot gas will be drawn into the pneumatic pumping cylinder 28 through the one-way intake pipe 31, and then the hot gas in the pneumatic pumping cylinder 28 will enter the feed pipe 13 through the one-way outlet pipe 32 to heat the slurry flowing through the feed pipe 13, increasing the fluidity of the slurry, enabling it to flow more quickly in the grouting pipeline 51, and preventing blockage in the grouting pipeline 51 due to poor fluidity of the slurry and reducing the grouting efficiency. Since the sealing sliding directions of the two sliding plugs 29 are opposite, continuous pumping of gas into the feed pipe 13 can be ensured to guarantee the uniformity of the slurry temperature.

[0046] An adjusting mechanism is installed inside the vertical shaft 6. The adjusting mechanism includes a vertical groove 33 opened inside the vertical shaft 6. The vertical groove 33 is communicated with the sliding groove 8 through a communication hole 34. The vertical groove 33 and the sliding groove 8 are filled with hydraulic oil. The upper end of the horizontal plate 5 is fixedly connected with a rotary joint 35 through a fixed shaft. The upper end of the vertical shaft 6 is fixedly connected with the rotary joint 35. The upper end of the rotary joint 35 is fixedly connected with an oil inlet pipe 52.

[0047] The adjusting mechanism further includes an adjusting box 36 fixedly connected to the upper end of the base 1 through a fixed shaft. The inner wall of the adjusting box 36 is hermetically and slidably connected with a sliding plate 37. The upper end of the base 1 is fixedly connected with an oil storage tank 38. The adjusting box 36 is communicated with the oil inlet pipe 52 through a first one-way oil suction pipe 39. The first one-way oil suction pipe 39 only allows hydraulic oil to enter the adjusting box 36. The adjusting box 36 is communicated with the oil storage tank 38 through a first one-way oil discharge pipe 40. The first one-way oil discharge pipe 40 only allows the hydraulic oil in the adjusting box 36 to enter the oil storage tank 38. First solenoid valves 41 are installed on the inner walls of the first one-way oil suction pipe 39 and the first one-way oil discharge pipe 40. The oil storage tank 38 is communicated with the adjusting box 36 through a second one-way oil suction pipe 42. The second one-way oil suction pipe 42 only allows the hydraulic oil in the oil storage tank 38 to enter the adjusting box 36. The adjusting box 36 is communicated with the oil inlet pipe 52 through a second one-way oil discharge pipe 43. The second one-way oil discharge pipe 43 only allows the hydraulic oil in the adjusting box 36 to be discharged. Second solenoid valves 44 are installed on the inner walls of the second one-way oil suction pipe 42 and the second one-way oil discharge pipe 43. A sliding block 45 is slidably connected to the inner wall of the adjusting box 36. Two push rods 46 are symmetrically and fixedly connected to the side wall of the sliding block 45. The other ends of the two push rods 46 are fixedly connected to the side wall of the sliding plate 37. A lead screw 47 is rotatably connected to the inner wall of the adjusting box 36. The side wall of the lead screw 47 is threadedly connected with the sliding block 45. One end of the lead screw 47 penetrates through the side wall of the adjusting box 36 and is fixedly connected with the rotating shaft 3.

[0048] Further, before the grouting starts, the first solenoid valve 41 is energized to open it, and the second solenoid valve 44 is de-energized to close it. As the slurry in the ducts of the precast beam and slab increases, the swing space of the grouting pipeline 51 will gradually decrease. Therefore, as the grouting progresses, the reciprocating forward and reverse rotation of the rotating shaft 3 can drive the reciprocating forward and reverse rotation of the lead screw 47, which in turn drives the slider 45 to reciprocate and slide in the adjustment box 36. The slider 45 will drive the slide plate 37 to reciprocate and seal through the push rod 46. Then, the hydraulic oil in the vertical groove 33 and the chute 8 will be pumped into the adjustment box 36 through the oil inlet pipe 52 and the first one-way oil suction pipe 39. Then, the hydraulic oil in the adjustment box 36 will enter the oil storage tank 38 through the first one-way oil discharge pipe 40 for storage. As the hydraulic oil in the chute 8 gradually decreases, the adjusting rod 9 will move towards the vertical shaft 6, which in turn drives the arc-shaped frame 11 to rotate towards the vertical shaft 6, reducing the inclination angle of the arc-shaped frame 11. As a result, the forward and reverse rotation angles of the two swing frames 4 will decrease, and the swing amplitude of the grouting pipeline 51 in the ducts of the precast beam and slab will gradually decrease, thus adapting to the increasing amount of slurry in the ducts of the precast beam and slab and preventing the grouting pipeline 51 from being deformed by extrusion, which may affect normal grouting. When the grouting is completed, the second solenoid valve 44 is energized to open it, and the first solenoid valve 41 is de-energized to close it. At this time, the hydraulic oil in the oil storage tank 38 will enter the adjustment box 36 through the second one-way oil suction pipe 42, and then the hydraulic oil will enter the vertical groove 33 again through the second one-way oil discharge pipe 43 and the oil inlet pipe 52, thereby pushing the adjusting rod 9 to move back to its original position and driving the arc-shaped frame 11 to rotate back to its original position.

[0049] Four sealing air bags 49 are fixedly connected to the side wall of the grouting pipeline 51. An air injection hole is provided on the sealing air bag 49, and a thimble valve is installed in the air injection hole. Inflation and deflation can be carried out through the air injection hole, which is a prior art.

[0050] A grouting pipe 50 is fixedly connected to the upper end of the slurry bucket 2.

[0051] In the present invention, the precast beam and slab are placed on the upper end of the placement table 20. The electric push rod 22 is driven to extend, driving the pressing plate 23 to move downward to press and fix the precast beam and slab. Then, the grouting pipeline 51 is passed through the two ducts of the precast beam and slab, and the two ends of the grouting pipeline 51 are respectively fixedly connected to the feed pipe 13 and the return pipe 14 using bolts. Then, an external inflation device is used to inflate the sealing air bag 49, causing the sealing air bag 49 to bulge and fit with the inner wall of the ducts of the precast beam and slab to form a seal. Next, the slurry is added to the slurry bucket 2 through the grouting pipe 50. Then, the motor 25 is started to drive the rotating rod 18 to rotate, which in turn drives a plurality of stirring blades 19 to rotate to stir the slurry, making the slurry more delicate.

[0052] Next, start the grouting pump 15. Under the action of the grouting pump 15, the grout in the grout bucket 2 will enter the grouting pipeline 51 through the slurry suction pipe 17 and the slurry pumping pipe 16. The grout flows in the grouting pipeline 51. When it flows through the discharge hole 48, part of the grout will flow out through the discharge hole 48 and enter the duct of the precast beam and slab. Finally, the excess grout will flow back into the grout bucket 2 through the return pipe 14. As the grouting pump 15 continues to operate, the grout will be pumped in and out in a cycle and slowly fill the duct of the precast beam and slab, thus completing the grouting.

[0053] During the grouting process, the rotation of the motor 25 will synchronously drive the rotation of the driving wheel 26, which in turn drives the rotation of the driven wheel 27, drives the rotation of the vertical shaft 6. The vertical shaft 6 will drive the rotation of the inclined rod 7 and the adjusting rod 9, which in turn drives the rotation of the connecting rod 10 and drives the rotation of the arc-shaped frame 11. Since the arc-shaped frame 11 is inclined and the arc-shaped frame 11 is rotatably connected to the swing frame 4, the arc-shaped frame 11 will drive the swing frames 4 on both sides to rotate in a reciprocating manner in both forward and reverse directions with the axis of the rotating shaft 3 as the rotation axis during the rotation process. This can drive the feeding pipe 13 and the return pipe 14 to rotate in a reciprocating manner in both forward and reverse directions, causing the grouting pipeline 51 to rotate reciprocally. The grouting pipeline 51 will form a swinging shape in the duct of the precast beam and slab, which can continuously stir and extrude the grout in the duct of the precast beam and slab, thereby reducing the gap between the grouts, compacting the grout, avoiding the filled grout from being too loose and resulting in weak strength. At the same time, squeezing the grout can also squeeze out the air inside it, eliminating the air bubbles inside the grout, which can further enhance the strength of the grout after solidification.

[0054] In addition, during the reciprocating rotation of the swing frame 4, it can drive the two vertical rods 30 to move up and down reciprocally, and the movement directions of the two vertical rods 30 are opposite. Thus, it can drive the two sliding plugs 29 to slide up and down for sealing. Under the action of the sliding plugs 29, the external hot air will be drawn into the air pump cylinder 28 through the one-way air inlet pipe 31, and then the hot air in the air pump cylinder 28 will enter the feeding pipe 13 through the one-way air outlet pipe 32 to heat the grout flowing through the feeding pipe 13, increasing the fluidity of the grout so that it can flow more quickly in the grouting pipeline 51, avoiding blockage in the grouting pipeline 51 due to poor fluidity of the grout and reducing the grouting efficiency. Since the sealing sliding directions of the two sliding plugs 29 are opposite, continuous air pumping can be carried out in the feeding pipe 13 to ensure the uniformity of the grout temperature.

[0055] During the entire operation process of the motor 25, it will vibrate due to the load itself. The vibration will be transmitted to the electric push rod 22 through the metal bracket 24, then the vibration will be transmitted to the pressure plate 23, and finally transmitted to the precast beam and slab, causing the precast beam and slab to vibrate during grouting, which can further eliminate the air bubbles inside the grout in the duct of the precast beam and slab and improve the grouting effect.

[0056] Before the grouting starts, energize the first solenoid valve 41 to open it, and de-energize the second solenoid valve 44 to close it. As the slurry in the ducts of the precast beam and slab increases, the swing space of the grouting pipeline 51 will gradually decrease. Therefore, as the grouting progresses, the reciprocating positive and negative rotation of the rotating shaft 3 can drive the reciprocating positive and negative rotation of the lead screw 47, and then drive the slider 45 to reciprocate and slide in the adjustment box 36. The slider 45 will drive the slide plate 37 to reciprocate and seal through the push rod 46. Then, the hydraulic oil in the vertical groove 33 and the chute 8 will be pumped into the adjustment box 36 through the oil inlet pipe 52 and the first one-way oil extraction pipe 39. Then, the hydraulic oil in the adjustment box 36 will enter the oil storage tank 38 through the first one-way oil discharge pipe 40 for storage. As the hydraulic oil in the chute 8 gradually decreases, the adjusting rod 9 will move towards the vertical shaft 6, and then drive the arc-shaped frame 11 to rotate towards the vertical shaft 6, reducing the inclination angle of the arc-shaped frame 11. As a result, the positive and negative rotation angles of the two swing frames 4 will decrease, so that the swing amplitude of the grouting pipeline 51 in the ducts of the precast beam and slab will gradually decrease, thus adapting to the increasing slurry in the ducts of the precast beam and slab and preventing the grouting pipeline 51 from being deformed by extrusion, which may affect the normal grouting.

[0057] When the grouting is completed, energize the second solenoid valve 44 to open it, and de-energize the first solenoid valve 41 to close it. At this time, the hydraulic oil in the oil storage tank 38 will enter the adjustment box 36 through the second one-way oil extraction pipe 42, and then the hydraulic oil will enter the vertical groove 33 again through the second one-way oil discharge pipe 43 and the oil inlet pipe 52, thereby pushing the adjusting rod 9 to move back to its original position and driving the arc-shaped frame 11 to rotate back to its original position.

[0058] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, shall be covered by the protection scope of the present invention.

Claims

1. A large-circulation grouting device for prefabricated beams and slabs, comprising a base and a grouting pipeline, characterized in that: A slurry barrel is fixedly connected to the upper end of the base, a horizontal plate is fixedly connected to the side wall of the slurry barrel, and a circulating grouting mechanism is installed on the base; The circulating grouting mechanism includes a rotating shaft rotatably connected to the side wall of the slurry barrel, two swing frames are symmetrically fixedly connected to the side wall of the rotating shaft, the lower end of the horizontal plate is rotatably connected to the vertical shaft, the side wall of the vertical shaft is fixedly connected to the inclined rod, a slide groove is provided on the side wall of the inclined rod, an adjusting rod is sealingly and slidably connected to the inner wall of the slide groove, a connecting rod is fixedly connected to the lower end of the adjusting rod, an arc frame is rotatably connected between the two swing frames, the lower end of the connecting rod is rotatably connected to the upper end of the arc frame, a feed pipe and a return pipe are respectively fixedly connected to the lower ends of the two swing frames, one end of the return pipe is connected to the slurry barrel, and a plurality of discharge holes are provided on the side wall of the grouting pipeline; An air pump mechanism is installed on the base, and the air pump mechanism includes two air pump cylinders symmetrically fixedly connected to the upper end of the base through a fixed axis, the inner walls of the two air pump cylinders are sealed and slidably connected with sliding plugs, the lower ends of the sliding plugs are rotatably connected to a vertical rod, the lower ends of the vertical rods are rotatably connected to the swing frame, the side walls of the air pump cylinders are fixedly connected to a one-way air inlet pipe, and the air pump cylinders are connected to the feed pipe through a one-way air outlet pipe; An adjustment mechanism is installed in the vertical shaft, and the adjustment mechanism includes a vertical slot opened in the vertical shaft, the vertical slot is connected with the slide slot through a connecting hole, the vertical slot and the slide slot are filled with hydraulic oil, the upper end of the horizontal plate is fixedly connected with a rotary joint through a fixed shaft, the upper end of the vertical shaft is fixedly connected with the rotary joint, and the upper end of the rotary joint is fixedly connected with an oil inlet pipe; The regulating mechanism also includes a regulating box fixedly connected to the upper end of the base through a fixed shaft, a sliding plate is sealingly and slidably connected to the inner wall of the regulating box, and an oil storage tank is fixedly connected to the upper end of the base, the regulating box is connected to the oil inlet pipe through a first one-way oil suction pipe, the regulating box is connected to the oil storage tank through a first one-way oil discharge pipe, a first solenoid valve is installed on the inner walls of the first one-way oil suction pipe and the first one-way oil discharge pipe, the oil storage tank is connected to the regulating box through a second one-way oil suction pipe, the regulating box is connected to the oil inlet pipe through the second one-way oil discharge pipe, and a second solenoid valve is installed on the inner walls of the second one-way oil suction pipe and the second one-way oil discharge pipe, a sliding block is slidingly connected to the inner wall of the regulating box, two push rods are symmetrically fixedly connected to the side wall of the sliding block, the other ends of the two push rods are fixedly connected to the side wall of the sliding block, a lead screw is rotatably connected to the inner wall of the regulating box, the side wall of the lead screw is threadedly connected to the sliding block, and one end of the lead screw passes through the side wall of the regulating box and is fixedly connected to the rotating shaft.

2. The large-cycle grouting device for prefabricated beams and slabs according to claim 1 is characterized in that: The circulating grouting mechanism also includes a grouting pump fixedly connected to the upper end of the base, the grouting pump is connected to the feed pipe through a grouting pipe, and the grouting pump is connected to the slurry barrel through a grouting pipe.

3. The large-cycle grouting device for prefabricated beams and slabs according to claim 1 is characterized in that: A rotating rod is rotatably connected to the top of the slurry barrel, and a plurality of stirring blades are fixedly connected to the side wall of the rotating rod.

4. The large-cycle grouting device for prefabricated beams and slabs according to claim 1 is characterized in that: A placing table is installed on the base, a mounting frame is fixedly connected to the upper end of the base, an electric push rod is fixedly connected to the upper end of the mounting frame, and a movable end of the electric push rod passes through the top of the mounting frame and is fixedly connected to a pressure plate.

5. The large-cycle grouting device for prefabricated beams and slabs according to claim 4 is characterized in that: A driving mechanism is installed on the electric push rod, and the driving mechanism includes a metal bracket fixedly connected to the upper end of the electric push rod, a motor is fixedly connected to the side wall of the metal bracket, the output end of the motor passes through the upper end of the slurry barrel and is fixedly connected to the rotating rod, a driving wheel is fixedly connected to the side wall of the motor output end, the upper end of the vertical shaft passes through the upper end of the horizontal plate and is fixedly connected to the driven wheel, and the driving wheel is connected to the driven wheel through a synchronous belt.

6. The large-cycle grouting device for precast beams and slabs according to claim 1 is characterized in that: Four sealing air bags are fixedly connected to the side wall of the grouting pipe.

7. The large-cycle grouting device for precast beams and slabs according to claim 1 is characterized in that: The upper end of the slurry barrel is fixedly connected with a grouting pipe.

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