Large-circulation grouting device for precast beams and slabs

Abstract

The invention relates to the technical field of grouting of precast beams and slabs, in particular to a large-circulation grouting device for precast beams and slabs, which comprises a base and a grouting pipeline, a slurry barrel is fixedly connected to the upper end of the base, a transverse plate is fixedly connected to the side wall of the slurry barrel, and a circulation grouting mechanism is mounted on the base; the circulating mud jacking mechanism comprises a rotating shaft rotationally connected to the side wall of the slurry barrel, two swing frames are symmetrically and fixedly connected to the side wall of the rotating shaft, a vertical shaft is rotationally connected to the lower end of the transverse plate, an inclined rod is fixedly connected to the side wall of the vertical shaft, a sliding groove is formed in the side wall of the inclined rod, and an adjusting rod is slidably connected to the inner wall of the sliding groove in a sealed mode; the lower end of the adjusting rod is fixedly connected with a connecting rod. According to the device, circulating grouting can be carried out on a prefabricated beam and slab pore channel, the grouting pipeline can swing and continuously stir and extrude slurry in the prefabricated beam and slab pore channel, then gaps between the slurry are reduced, the slurry is compacted, and the situation that the filled slurry is too loose, and consequently the strength is low is avoided.

Description

Technical Field

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

[0002] At present, in order to ensure the maximum span capacity of bridges, large-span bridge designs are increasingly being adopted. In order to ensure bridge safety, many structures use prestressing to eliminate adverse bending moments, so that the structure is in a better stress state. In particular, prestressing must be used in the construction of precast beams and slabs of bridges.

[0003] During the construction of existing prefabricated beams and slabs, it is necessary to grout the inside of their channels to reduce prestress and ensure the service life of the bridge. However, when grouting the channels of prefabricated beams and slabs, the slurry is directly poured into the channels. This method will make the slurry inside the channels loose, and the strength of the solidified slurry will be poor. In addition, there is a large amount of air between the slurry, and there will be many pores on the surface of the solidified slurry, which will further weaken the structural strength of the slurry block.

[0004] Based on this, we propose a large-circulation grouting device for precast beams and 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 prefabricated beams and slabs.

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

[0007] A large-circulation grouting device for prefabricated beams and slabs, comprising a base and a grouting pipeline, wherein a slurry bucket is fixedly connected to the upper end of the base, a transverse plate is fixedly connected to the side wall of the slurry bucket, and a circulation 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 barrel, and 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, and the side wall of the vertical shaft is fixedly connected to an inclined rod. A slide groove is provided on the side wall of the inclined rod, and an adjusting rod is sealingly and slidably connected to the inner wall of the slide groove. The lower end of the adjusting rod is fixedly connected to a connecting rod, and 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.

[0009] Preferably, the circulating grouting mechanism further comprises a grouting pump fixedly connected to the upper end of the base, the grouting pump is connected to the feed pipe via a grouting pipe, and the grouting pump is connected to the slurry barrel via a grouting pipe.

[0010] Preferably, 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.

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

[0012] Preferably, 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 axis 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.

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

[0014] Preferably, an adjustment mechanism is installed in the vertical shaft, and the adjustment mechanism includes a vertical groove opened in the vertical shaft, the vertical groove is connected with the slide groove through a connecting hole, the vertical groove and the slide groove are filled with hydraulic oil, the upper end of the horizontal plate is fixedly connected to a rotating joint through a fixed shaft, the upper end of the vertical shaft is fixedly connected to the rotating joint, and the upper end of the rotating joint is fixedly connected to an oil inlet pipe.

[0015] and a tube connecting the discharging opening of the pump with a plug in the forward end of the crank case, said tube having a check valve in it at the pump end, and said former tube which connects the pump to the oil drain plug, said tube having a check valve in it at the pump end, and said former tube which connects the pump to the oil drain plug, said tube having a check valve in it at the pump end.

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

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

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. By setting up a circulating grouting mechanism, the precast beam and slab channels can be circulated and grouting can be performed, and the grouting pipe can swing to continuously stir and squeeze the slurry in the precast beam and slab channels, thereby reducing the gaps between the slurries and compacting the slurry to avoid the filled slurry being too loose, resulting in weak strength.

[0020] 2. By setting up a pump air mechanism, the two vertical rods can be driven to move back and forth up and down during the reciprocating rotation of the swing frame, and the movement directions of the two vertical rods are opposite, thereby driving the two sliding plugs to slide back and forth in a sealed manner. Under the action of the sliding plug, 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, heating the slurry flowing through the feed pipe, increasing the fluidity of the slurry, and enabling it to flow more quickly in the grouting pipe, avoiding blockage in the grouting pipe due to poor fluidity of the slurry, thereby reducing the efficiency of grouting.

[0021] 3. By setting up the adjustment mechanism, before the grouting starts, the first solenoid valve is energized to open, and the second solenoid valve is de-energized to close. As the slurry in the precast beam and slab channel increases, the swing space of the grouting pipe will gradually decrease. Therefore, as the grouting proceeds, the reciprocating forward and reverse rotation of the shaft can drive the lead screw to reciprocate forward and reverse rotation, thereby driving the slider to slide back and forth in the adjustment box. The slider will drive the slide plate to slide back and forth through the push rod, and then the hydraulic oil in the vertical groove and the slide groove will be pumped into the adjustment box through the oil inlet pipe and the first one-way oil extraction pipe. Then the hydraulic oil in the adjusting box will enter the oil storage tank through the first one-way oil drain pipe for storage, and as the hydraulic oil in the slide chute gradually decreases, the adjusting rod will move toward the vertical axis, thereby driving the arc frame to rotate toward the vertical axis, reducing the inclination angle of the arc frame, thereby reducing the positive and negative rotation angles of the two swing frames, thereby gradually reducing the swing amplitude of the grouting pipe in the precast beam channel, thereby adapting to the increasing slurry in the precast beam channel and avoiding the grouting pipe from being deformed due to extrusion and affecting the normal grouting.

[0022] 4. By setting up the motor and the metal bracket, the motor itself will vibrate due to the load during the entire operation process. The vibration will be transmitted to the electric push rod through the metal bracket, and then the vibration will be transmitted to the pressure plate, and finally to the prefabricated beam plate, so that the prefabricated beam plate can vibrate during grouting, which can further eliminate the bubbles inside the slurry in the prefabricated beam plate channel and improve the grouting effect.

[0023] 5. By setting up the mounting frame, electric push rod and pressure plate, the precast beam is placed on the upper end of the placement table, the electric push rod is driven to extend, and the pressure plate is driven to move downward to press and fix the precast beam, which can ensure the stability of the precast beam during grouting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a large-cycle grouting device for prefabricated beams and slabs proposed by the present invention;

[0025] Figure 2 for Figure 1 A rear view schematic diagram of the structure in the middle;

[0026] Figure 3 for Figure 1 A schematic cross-sectional view of the structure;

[0027] Figure 4 for Figure 2 A schematic cross-sectional view of the structure;

[0028] Figure 5 for Figure 3 A magnified schematic diagram of the structure in the middle;

[0029] Figure 6 for Figure 3 A magnified schematic diagram of structure B in the middle;

[0030] Figure 7 for Figure 3 A magnified schematic diagram of the C structure;

[0031] Figure 8 for Figure 1 Schematic diagram of the structure of the medium-circulation grouting mechanism.

[0032] In the figure: 1. base; 2. slurry barrel; 3. rotating shaft; 4. swing frame; 5. horizontal plate; 6. vertical axis; 7. inclined rod; 8. slideway; 9. adjusting rod; 10. connecting rod; 11. arc frame; 13. feeding pipe; 14. return pipe; 15. grouting pump; 16. slurry pump pipe; 17. slurry extraction pipe; 18. rotating rod; 19. stirring blade; 20. placing table; 21. mounting frame; 22. electric push rod; 23. pressing plate; 24. metal bracket; 25. motor; 26. driving wheel; 27. driven wheel; 28. pump cylinder; 29. ​​sliding plug; 30. Vertical rod; 31. One-way air inlet pipe; 32. One-way air outlet pipe; 33. Vertical slot; 34. Connecting hole; 35. Rotary joint; 36. Adjusting box; 37. Slide 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. Sliding block; 46. Push rod; 47. Lead screw; 48. Discharge hole; 49. Sealing air bag; 50. Grouting pipe; 51. Grouting pipe; 52. Oil inlet pipe. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Reference Figure 1 - Figure 7 A large-circulation grouting device for prefabricated beams and slabs comprises a base 1 and a grouting pipe 51, a slurry barrel 2 is fixedly connected to the upper end of the base 1, a transverse plate 5 is fixedly connected to the side wall of the slurry barrel 2, and a circulation 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 barrel 2, two swing frames 4 are symmetrically fixedly connected to the side wall of the rotating shaft 3, the lower end of the horizontal plate 5 is rotatably connected to the vertical shaft 6, the side wall of the vertical shaft 6 is fixedly connected to the inclined rod 7, the side wall of the inclined rod 7 is provided with a slide groove 8, the inner wall of the slide groove 8 is sealingly and slidably connected to the adjusting rod 9, the lower end of the adjusting rod 9 is fixedly connected to the connecting rod 10, the two swing frames 4 are rotatably connected together with an arc frame 11, the lower end of the connecting rod 10 is rotatably connected to the upper end of the arc frame 11, the lower ends of the two swing frames 4 are respectively fixedly connected with a feed pipe 13 and a return pipe 14, one end of the return pipe 14 is connected to the slurry barrel 2, and the side wall of the grouting pipeline 51 is provided with a plurality of discharge holes 48.

[0036] It should be noted that the connection portion between the return pipe 14 and the swing frame 4 is made of a hard pipe, and the remaining portion is made of a soft pipe.

[0037] The circulating grouting mechanism also includes a grouting pump 15 fixedly connected to the upper end of the base 1 . The grouting pump 15 is connected to the feed pipe 13 through a grouting pipe 16 . The grouting pipe 16 is made of a hose. The grouting pump 15 is connected to the slurry barrel 2 through a grouting pipe 17 .

[0038] A rotating rod 18 is rotatably connected to the top of the slurry barrel 2, and 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. A mounting 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 mounting frame 21. The movable end of the electric push rod 22 passes through the top of the mounting frame 21 and is fixedly connected to a pressing plate 23.

[0040] Furthermore, the precast beam is placed on the upper end of the placement table 20, the electric push rod 22 is driven to extend, and the pressing plate 23 is driven to move downward to press and fix the precast beam, which can ensure the stability of the precast beam during grouting.

[0041] A driving mechanism is installed on the electric push rod 22, and the driving mechanism includes a metal bracket 24 fixedly connected to the upper end of the electric push rod 22, and a motor 25 is fixedly connected to the side wall of the metal bracket 24. The output end of the motor 25 passes through the upper end of the slurry barrel 2 and is fixedly connected to the rotating rod 18. The side wall of the output end of the motor 25 is fixedly connected to a driving wheel 26, and the upper end of the vertical axis 6 passes 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 process, the motor 25 itself will vibrate due to the load, and the vibration will be transmitted to the electric push rod 22 through the metal bracket 24, and then the vibration will be transmitted to the pressure plate 23, and finally to the precast beam slab, so that the precast beam slab can vibrate during grouting, which can further eliminate the bubbles inside the slurry in the precast beam slab channel and improve the grouting effect.

[0043] Furthermore, during the grouting process, the rotation of the motor 25 will synchronously drive the driving wheel 26 to rotate, and then drive the driven wheel 27 to rotate, and drive 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, and drive the arc frame 11 to rotate. Since the arc frame 11 is inclined and the arc frame 11 is rotatably connected to the swing frame 4, the arc frame 11 will drive the swing frames 4 on both sides to rotate back and forth with the axis of the rotating shaft 3 as the rotation axis during the rotation process, and then can drive the feed pipe 13 and the return pipe 14 to rotate back and forth, so that the grouting pipe 51 reciprocates. The grouting pipe 51 will form a swinging shape in the channel of the precast beam and slab, which can continuously stir and squeeze the slurry in the channel of the precast beam and slab, thereby reducing the gap between the slurries, compacting the slurry, and avoiding the filled slurry being too loose, resulting in weak strength. At the same time, squeezing the slurry can also squeeze out the air inside it, eliminate the bubbles inside the slurry, and further enhance the strength of the slurry after solidification.

[0044] An air pumping mechanism is installed on the base 1, and the air pumping mechanism includes two air pumping cylinders 28 symmetrically fixedly connected to the upper end of the base 1 through a fixed axis, the inner walls of the two air pumping cylinders 28 are sealed and slidably connected with a sliding plug 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, and a one-way air inlet pipe 31 is fixedly connected to the side wall of the air pumping cylinder 28, the one-way air inlet pipe 31 is connected to an external container for storing hot air, and the one-way air inlet pipe 31 only allows external hot air to enter the air pumping cylinder 28, the air pumping cylinder 28 is connected to the feed pipe 13 through a one-way air outlet pipe 32, and the one-way air outlet pipe 32 only allows the hot air in the air pumping cylinder 28 to enter the feed pipe 13.

[0045] Furthermore, during the process of the forward and reverse reciprocating rotation of the swing frame 4, the two vertical rods 30 can be driven to move back and forth, and the movement directions of the two vertical rods 30 are opposite, thereby driving the two sliding plugs 29 to slide back and forth in a sealed manner. Under the action of the sliding plug 29, the external hot air will be drawn into the pump cylinder 28 through the one-way air inlet pipe 31, and then the hot air in the pump cylinder 28 will enter the feed pipe 13 through the one-way air outlet pipe 32, heating the slurry flowing through the feed pipe 13, increasing the fluidity of the slurry, allowing it to flow more quickly in the grouting pipe 51, avoiding blockage in the grouting pipe 51 due to poor fluidity of the slurry, thereby reducing the efficiency of grouting. Since the sealing sliding directions of the two sliding plugs 29 are opposite, the feed pipe 13 can be continuously pumped to ensure the uniformity of the slurry temperature.

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

[0047] The regulating mechanism also includes a regulating box 36 fixedly connected to the upper end of the base 1 through a fixed shaft, a slide plate 37 is sealingly and slidably connected to the inner wall of the regulating box 36, an oil storage tank 38 is fixedly connected to the upper end of the base 1, the regulating box 36 is connected to the oil inlet pipe 52 through a first one-way oil extraction pipe 39, the first one-way oil extraction pipe 39 only allows hydraulic oil to enter the regulating box 36, the regulating box 36 is connected to 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 regulating box 36 to enter the oil storage tank 38, the first one-way oil extraction pipe 39 and the first one-way oil discharge pipe 40 are both installed with a first solenoid valve 41 on the inner walls, the oil storage tank 38 is connected to the regulating box 36 through a second one-way oil extraction pipe 42, and the second one-way oil discharge pipe 40 is connected to the regulating box 36. The one-way oil extraction pipe 42 only allows the hydraulic oil in the oil storage tank 38 to enter the regulating box 36. The regulating box 36 is connected to the oil inlet pipe 52 through the second one-way oil discharge pipe 43. The second one-way oil discharge pipe 43 only allows the hydraulic oil in the regulating box 36 to be discharged. The inner walls of the second one-way oil extraction pipe 42 and the second one-way oil discharge pipe 43 are both installed with a second solenoid valve 44. The inner wall of the regulating box 36 is slidably connected with a slider 45. The side wall of the slider 45 is symmetrically fixedly connected with two push rods 46. The other ends of the two push rods 46 are fixedly connected to the side wall of the slide plate 37. The inner wall of the regulating box 36 is rotatably connected with a screw 47. The side wall of the screw 47 is threadedly connected to the slider 45. One end of the screw 47 passes through the side wall of the regulating box 36 and is fixedly connected to the rotating shaft 3.

[0048] Furthermore, before grouting begins, the first solenoid valve 41 is energized to open it, and the second solenoid valve 44 is de-energized to close. As the slurry in the precast beam channel increases, the swingable space of the grouting pipe 51 will gradually decrease. Therefore, as grouting proceeds, the reciprocating forward and reverse rotation of the rotating shaft 3 can drive the lead screw 47 to rotate back and forth, thereby driving the slider 45 to slide back and forth in the adjusting box 36. The slider 45 will drive the slide plate 37 to slide back and forth in a sealed manner through the push rod 46, and then the hydraulic oil in the vertical groove 33 and the slide groove 8 will be pumped into the adjusting box 36 through the oil inlet pipe 52 and the first one-way oil extraction pipe 39, and then the hydraulic oil in the adjusting 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 slide groove 8 gradually decreases, the adjusting rod 9 will move closer to the vertical groove 33 and the slide groove 8. The arc frame 11 moves in the direction of the vertical axis 6, thereby driving the arc frame 11 to rotate in the direction close to the vertical axis 6, so that the inclination angle of the arc frame 11 is reduced, and then the positive and negative rotation angles of the two swing frames 4 are reduced, so that the swing amplitude of the grouting pipe 51 in the precast beam channel is gradually reduced, so as to adapt to the increasing slurry in the precast beam channel, avoid the grouting pipe 51 from being deformed due to extrusion, and affect the 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 and closed. At this time, the hydraulic oil in the oil storage tank 38 will enter the regulating 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 and reset, driving the arc frame 11 to rotate and reset.

[0049] Four sealing air bags 49 are fixedly connected to the side wall of the grouting pipe 51. The sealing air bags 49 are provided with air injection holes, and ejector valves are installed in the air injection holes. Inflation and deflation can be performed through the air injection holes, which is a prior art.

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

[0051] In the present invention, the precast beam is placed on the upper end of the placement table 20, the electric push rod 22 is driven to extend, and the pressing plate 23 is driven to move downward to press and fix the precast beam, and then the grouting pipe 51 is passed through the two holes of the precast beam, and then the two ends of the grouting pipe 51 are fixedly connected to the feed pipe 13 and the return pipe 14 by bolts, and then the sealing airbag 49 is inflated by an external inflation device, so that the sealing airbag 49 bulges and fits with the inner wall of the precast beam channel to form a seal, and then the slurry is added into the slurry barrel 2 through the grouting pipe 50, and then the motor 25 is started to drive the rotating rod 18 to rotate, and then drive the multiple stirring blades 19 to rotate, so as to stir the slurry to make the slurry more delicate.

[0052] Then start the grouting pump 15. Under the action of the grouting pump 15, the slurry in the slurry barrel 2 will enter the grouting pipe 51 through the grouting pipe 17 and the slurry pumping pipe 16. The slurry flows in the grouting pipe 51. When it flows through the discharge hole 48, part of the slurry will flow out through the discharge hole 48 and enter the channel of the precast beam slab. Finally, the excess slurry will flow back into the slurry barrel 2 through the return pipe 14. With the continuous operation of the grouting pump 15, the slurry will be pumped in and out repeatedly and slowly fill the channel of the precast beam slab, thereby completing the grouting.

[0053] During the grouting process, the rotation of the motor 25 will synchronously drive the driving wheel 26 to rotate, and then drive the driven wheel 27 to rotate, drive the vertical shaft 6 to rotate, and 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, and drive the arc frame 11 to rotate. Since the arc frame 11 is inclined and the arc frame 11 is rotatably connected to the swing frame 4, the arc frame 11 will drive the swing frames 4 on both sides to rotate back and forth with the axis of the rotating shaft 3 as the rotation axis during the rotation process, and then can drive the feed pipe 13 and the return pipe 14 to rotate back and forth, so that the grouting pipe 51 reciprocates, and the grouting pipe 51 will form a swinging shape in the channel of the precast beam and slab, which can continuously stir and squeeze the slurry in the channel of the precast beam and slab, thereby reducing the gap between the slurries, compacting the slurry, and avoiding the filled slurry being too loose, resulting in weak strength. At the same time, squeezing the slurry can also squeeze out the air inside it, eliminate the bubbles inside the slurry, and further enhance the strength of the slurry after solidification.

[0054] In addition, during the process of the reciprocating rotation of the swing frame 4, the two vertical rods 30 can be driven to move reciprocally up and down, and the movement directions of the two vertical rods 30 are opposite, so that the two sliding plugs 29 can be driven to slide back and forth in a sealed manner. Under the action of the sliding plug 29, the external hot air will be drawn into the pump cylinder 28 through the one-way air inlet pipe 31, and then the hot air in the pump cylinder 28 will enter the feed pipe 13 through the one-way air outlet pipe 32, heating the slurry flowing through the feed pipe 13, increasing the fluidity of the slurry, allowing it to flow more quickly in the grouting pipe 51, avoiding blockage in the grouting pipe 51 due to poor fluidity of the slurry, thereby reducing the efficiency of grouting. Since the sealing sliding directions of the two sliding plugs 29 are opposite, the feed pipe 13 can be continuously pumped to ensure the uniformity of the slurry temperature.

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

[0056] Before grouting begins, the first solenoid valve 41 is energized to open, and the second solenoid valve 44 is de-energized to close. As more and more slurry is in the precast beam channel, the swing space of the grouting pipe 51 will gradually decrease. Therefore, as grouting proceeds, the reciprocating forward and reverse rotation of the shaft 3 can drive the lead screw 47 to reciprocate forward and reverse rotation, thereby driving the slider 45 to reciprocate in the adjustment box 36. The slider 45 will drive the slide plate 37 to reciprocate and seal through the push rod 46, and then the hydraulic oil in the vertical groove 33 and the slide groove 8 will be pumped into the adjustment box 36 through the oil inlet pipe 52 and the first one-way oil extraction pipe 39. , and then the hydraulic oil in the regulating box 36 will enter the oil storage tank 38 for storage through the first one-way oil drain pipe 40. As the hydraulic oil in the slide 8 gradually decreases, the regulating rod 9 will move toward the direction close to the vertical axis 6, thereby driving the arc frame 11 to rotate toward the direction close to the vertical axis 6, so that the inclination angle of the arc frame 11 is reduced, and then the positive and negative rotation angles of the two swing frames 4 are reduced, so that the swing amplitude of the grouting pipe 51 in the precast beam channel is gradually reduced, thereby adapting to the increasing slurry in the precast beam channel, and avoiding the grouting pipe 51 from being deformed due to extrusion, which affects the normal grouting.

[0057] When grouting is completed, the second solenoid valve 44 is energized to open, and the first solenoid valve 41 is de-energized and closed. At this time, the hydraulic oil in the oil storage tank 38 will enter the regulating 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 regulating rod 9 to move and reset, and driving the arc frame 11 to rotate and reset.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should 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 (1) and a grouting pipeline (51), characterized in that: The upper end of the base (1) is fixedly connected to a slurry barrel (2), the side wall of the slurry barrel (2) is fixedly connected to a transverse plate (5), and a circulating grouting mechanism is installed on the base (1); The circulating grouting mechanism comprises a rotating shaft (3) rotatably connected to the side wall of the slurry barrel (2); the side wall of the rotating shaft (3) is symmetrically fixedly connected with two swing frames (4); the lower end of the horizontal plate (5) is rotatably connected with a vertical shaft (6); the side wall of the vertical shaft (6) is fixedly connected with an inclined rod (7); the side wall of the inclined rod (7) is provided with a slide groove (8); the inner wall of the slide groove (8) is sealingly and slidably connected with an adjusting rod (9); the lower end of the adjusting rod (9) is fixedly connected with a connecting rod (10); the two swing frames (4) are rotatably connected with an arc frame (11); the lower end of the connecting rod (10) is rotatably connected with the upper end of the arc frame (11); the lower ends of the two swing frames (4) are respectively fixedly connected with a feed pipe (13) and a return pipe (14); one end of the return pipe (14) is connected to the slurry barrel (2); and the side wall of the grouting pipeline (51) is provided with a plurality of discharge holes (48).

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 (15) fixedly connected to the upper end of the base (1); the grouting pump (15) is connected to the feed pipe (13) via a grouting pipe (16); and the grouting pump (15) is connected to the slurry barrel (2) via a grouting pipe (17).

3. The large-cycle grouting device for prefabricated beams and slabs according to claim 1 is characterized in that: A rotating rod (18) is rotatably connected to the top of the slurry barrel (2), and a plurality of stirring blades (19) are fixedly connected to the side wall of the rotating rod (18).

4. The large-cycle grouting device for prefabricated beams and slabs according to claim 1 is characterized in that: A placing table (20) is installed on the base (1); the upper end of the base (1) is fixedly connected to a mounting frame (21); the upper end of the mounting frame (21) is fixedly connected to an electric push rod (22); the movable end of the electric push rod (22) passes through the top of the mounting frame (21) and is fixedly connected to a pressure plate (23).

5. The large-cycle grouting device for prefabricated beams and slabs according to claim 4 is characterized in that: The electric push rod (22) is provided with a driving mechanism, the driving mechanism comprising a metal bracket (24) fixedly connected to the upper end of the electric push rod (22), a motor (25) fixedly connected to the side wall of the metal bracket (24), an output end of the motor (25) passing through the upper end of the slurry barrel (2) and fixedly connected to the rotating rod (18), a driving wheel (26) fixedly connected to the side wall of the output end of the motor (25), an upper end of the vertical shaft (6) passing through the upper end of the horizontal plate (5) and fixedly connected to a driven wheel (27), and the driving wheel (26) is connected to the driven wheel (27) via a synchronous belt.

6. The large-cycle grouting device for precast beams and slabs according to claim 1 is characterized in that: The base (1) is provided with an air pump mechanism, which comprises two air pump cylinders (28) symmetrically fixedly connected to the upper end of the base (1) via a fixed axis, the inner walls of the two air pump cylinders (28) are sealed and slidably connected with a sliding plug (29), the lower end of the sliding plug (29) is rotatably connected with a vertical rod (30), the lower end of the vertical rod (30) is rotatably connected with a swing frame (4), the side wall of the air pump cylinder (28) is fixedly connected with a one-way air inlet pipe (31), and the air pump cylinder (28) is connected with a feed pipe (13) via a one-way air outlet pipe (32).

7. The large-cycle grouting device for prefabricated beams and slabs according to claim 6 is characterized in that: An adjusting mechanism is installed in the vertical shaft (6), and the adjusting mechanism comprises a vertical groove (33) opened in the vertical shaft (6). The vertical groove (33) is connected with the slide groove (8) through a connecting hole (34). The vertical groove (33) and the slide groove (8) are filled with hydraulic oil. The upper end of the horizontal plate (5) is fixedly connected with a rotating joint (35) through a fixed shaft. The upper end of the vertical shaft (6) is fixedly connected with the rotating joint (35), and the upper end of the rotating joint (35) is fixedly connected with an oil inlet pipe (52).

8. The large-cycle grouting device for prefabricated beams and slabs according to claim 7 is characterized in that: The regulating mechanism further comprises a regulating box (36) fixedly connected to the upper end of the base (1) via a fixed shaft, the inner wall of the regulating box (36) being sealingly and slidably connected to a slide plate (37), the upper end of the base (1) being fixedly connected to an oil storage tank (38), the regulating box (36) being connected to an oil inlet pipe (52) via a first one-way oil extraction pipe (39), the regulating box (36) being connected to the oil storage tank (38) via a first one-way oil discharge pipe (40), the inner walls of the first one-way oil extraction pipe (39) and the first one-way oil discharge pipe (40) being both provided with a first solenoid valve (41), the oil storage tank (38) being connected to the regulating box (36) via a second one-way oil extraction pipe (42), the regulating The section box (36) is connected to the oil inlet pipe (52) through a second one-way oil discharge pipe (43); the inner walls of the second one-way oil extraction pipe (42) and the second one-way oil discharge pipe (43) are both installed with a second solenoid valve (44); the inner wall of the regulating box (36) is slidably connected with a slider (45); the side wall of the slider (45) is symmetrically fixedly connected with two push rods (46); the other ends of the two push rods (46) are fixedly connected to the side wall of the slide plate (37); the inner wall of the regulating box (36) is rotatably connected with a lead screw (47); the side wall of the lead screw (47) is threadedly connected to the slider (45); one end of the lead screw (47) passes through the side wall of the regulating box (36) and is fixedly connected to the rotating shaft (3).

9. The large-cycle grouting device for precast beams and slabs according to claim 1 is characterized in that: Four sealing air bags (49) are fixedly connected to the side wall of the grouting pipe (51).

10. The large-cycle grouting device for prefabricated beams and slabs according to claim 1 is characterized in that: The upper end of the slurry barrel (2) is fixedly connected with a grouting pipe (50).

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