Secondary Foaming and Stirring Device during the Pumping Process of Foamed Lightweight Soil

Abstract

The present invention discloses a secondary foaming and stirring device during the pumping process of foam lightweight soil, belonging to the technical field of road construction devices. The device includes a box body and a stirring and foam spraying device located inside the box body; the foam spraying device consists of a hollow main transmission shaft, a driving gear, a main transmission bearing, and a rotary joint. The foam lightweight soil enters the box body through the foam soil input pipeline for short-term storage, foam is added into the box body through the main transmission shaft, and the stirring rod fully stirs the foam and the foam lightweight soil in the box body. Then, the pump body provided in the pipeline sucks out the foam lightweight soil after secondary foaming from the box body through the foam soil and continues to transport it in the pumping pipeline, enabling the foam lightweight soil to be secondarily foamed and fully stirred without stopping the pipeline transportation, and solving the serious defoaming problem existing in the long-distance transportation process of the foam lightweight soil.

Description

Technical Field

[0001] The present invention relates to a long-distance conveying device for foamed lightweight soil, belonging to the technical field of road construction devices. Background Art

[0002] When using foamed lightweight soil as a subgrade filler for road construction, if the preparation station of the foamed lightweight soil is far from the construction pouring site, especially when the pumping distance of the foamed lightweight soil exceeds 400m, serious defoaming phenomenon will occur to the foamed lightweight soil, seriously reducing the working performance of the foamed lightweight soil.

[0003] To solve the problem that serious defoaming phenomenon will occur during the long-distance transportation of foamed lightweight soil, the current common practice is to first prepare cement slurry, pump the cement slurry into the mixing tank of the foamed lightweight soil equipment beside the pouring area, and then carry out the preparation and pouring of foamed lightweight soil. However, this method requires the construction of a foamed soil mixing tank in the construction area, increasing the workload, and the position of the on-site mixing tank is generally fixed, which hinders the construction. As the road construction work progresses, it is necessary to build another mixing tank, which is time-consuming and laborious. Summary of the Invention

[0004] The object of the present invention is to solve the technical problem of "the defoaming problem of foamed lightweight soil during long-distance pumping", and provide a device that can effectively solve the defoaming problem during the pumping process of foamed lightweight soil. The technical solution of the present invention is to set a secondary foaming and stirring device during the transportation of foamed lightweight soil in the middle of the pipeline for long-distance pumping of foamed lightweight soil, and the distance between it and the foamed lightweight soil preparation station is between 200 - 300m.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The secondary foaming and stirring device during the pumping process of foamed lightweight soil includes:

[0007] A box body, having a foamed lightweight soil output port and a foamed lightweight soil input port; the foamed lightweight soil output port and the foamed lightweight soil input port are respectively arranged on opposite sides of the box body, and the foamed lightweight soil input port is located below the foamed lightweight soil output port;

[0008] A main transmission shaft, which is a hollow structure, with one end open and configured as a foam inlet, and the other end closed; the main transmission shaft is arranged in the box body, and its open end and sealed end pass through opposite sides of the box body and are located outside the box body; the main transmission shaft is sealed with the wall of the box body and rotates around the center line in its length direction;

[0009] The foam injection pipe is of a hollow structure with one end open. The open end of the foam injection pipe is connected to the main drive shaft and is in internal communication with the main drive shaft. The foam injection pipe is provided with a foam outlet.

[0010] The one-way plug is arranged at the foam outlet of the foam injection pipe to enable the one-way injection of foam from inside the foam injection pipe to the outside.

[0011] The driven shaft is arranged inside the box body. Both ends of the driven shaft pass through the box body and are located outside the box body, and are sealed with the wall of the box body. The driven shaft rotates about the central axis in its length direction. The driven shaft is located above or below the main drive shaft.

[0012] One end of the stirring rod is connected to the driven shaft and forms an angle with the driven shaft. The stirring rods and the foam injection pipes are arranged in a staggered manner.

[0013] The driving motor drives the main drive shaft and the driven shaft to rotate.

[0014] The secondary foam adding and stirring device of the present invention is arranged in the middle of the pipeline for long-distance pumping of foamed lightweight soil. The foamed lightweight soil enters the box body of the secondary foam adding and stirring device through the foam soil input pipeline for short-term storage. Foam is added into the box body through the main drive shaft of the secondary foam adding and stirring device. The stirring rods fully stir the foam and the foamed lightweight soil in the box body. Then, the pump body arranged in the pipeline sucks out the foamed lightweight soil after secondary foam adding from the box body through the foam soil and continues to transport it in the pumping pipeline.

[0015] According to some embodiments disclosed by the present invention, both ends of the main drive shaft respectively pass through both sides of the box body where the foamed lightweight soil outlet and the foamed lightweight soil inlet are arranged.

[0016] According to some embodiments disclosed by the present invention, the foam outlet is located at the other end of the foam injection pipe.

[0017] According to some embodiments disclosed by the present invention, the driven shaft is divided into an upper driven shaft and a lower driven shaft. The upper driven shaft is located above the main drive shaft, and the lower driven shaft is located below the main drive shaft.

[0018] According to some embodiments disclosed by the present invention, the stirring rods of the upper driven shaft and the stirring rods of the lower driven shaft are arranged side by side.

[0019] According to some embodiments disclosed by the present invention, the angle between the stirring rod and the driven shaft is 90°.

[0020] According to some embodiments disclosed by the present invention, the driven shaft is parallel to the main drive shaft and is located in the same plane.

[0021] According to some embodiments disclosed by the present invention, it further includes a rotary joint and a rotary joint bearing; the rotary joint is connected to the open end of the main transmission shaft through the rotary joint bearing and is in internal communication with the main transmission shaft; the rotary joint has a foam inlet.

[0022] According to some embodiments disclosed by the present invention, the main transmission shaft and the wall of the box body are connected through a bearing; the driven shaft and the wall of the box body are connected through a bearing; outside the box body, the sealed end of the main transmission shaft and the driven shaft are meshed through gears; the driving motor drives the main transmission shaft.

[0023] According to some embodiments disclosed by the present invention, it further includes: a foam storage box and a foam pressurizing pump; the foam storage box and the foam pressurizing pump are located above the box body, and the foam storage box is provided with a foam outlet; the inlet of the foam pressurizing pump is communicated with the foam outlet of the foam storage box, and the outlet of the foam pressurizing pump is communicated with the foam inlet of the main transmission shaft.

[0024] The beneficial effects of the present invention are:

[0025] Firstly: It realizes the secondary foaming of foamed light soil during long-distance pumping, enabling the foamed light soil to still maintain good working performance during long-distance pumping.

[0026] Secondly: The device of this invention is directly installed in the middle of the foamed light soil pumping pipeline, and can realize the secondary foaming of foamed light soil on the premise of maintaining the pumping speed of foamed light soil. While improving the working performance of long-distance transportation of foamed light soil, it also ensures the transportation efficiency of foamed light soil.

[0027] Thirdly: The two driven gears of the invented device are meshed with the driving gear, which can realize the synchronous rotation of the main transmission shaft and the two driven shafts, thereby enabling the invented device to uniformly stir the foamed light soil while performing secondary foaming on the foamed light soil, and accelerating the working efficiency.

[0028] Fourthly: The upper stirring rod, the lower stirring rod and the foam injection pipe of the invented device are arranged alternately, which can improve the stirring efficiency and at the same time enable the foamed light soil near the main transmission shaft to be fully stirred.

[0029] Fifthly: The main transmission shaft of the invented device is connected to the rotary joint through a water-stop bearing outside the box body, ensuring that the rotary joint can remain stationary during the rotation of the main transmission shaft to ensure that the foam can smoothly enter the hollow main transmission shaft.

[0030] Sixthly: The foam injection pipe of the invented device is connected to the hollow main transmission shaft, and at the same time a one-way plug is arranged at the inner tip of the foam injection pipe to ensure that the foam injection pipe will not be blocked by foamed light soil during the working process.

[0031] VII: The invented device is provided with a foam storage box and a foam pressurizing device at the upper part of the box body, which can pressurize the foam to a certain extent, thus making it more conducive for the foam to reach the foam injection pipe through the hollow main transmission shaft and facilitating the ejection of the foam.

[0032] VIII: The foam input pipe and the foam output pipe set in the invented device are located on both sides of the box body. At the same time, the foam input pipe should be located below the foam output pipe, so as to use the mixing box as a temporary storage device for foam lightweight soil, enabling the foam lightweight soil pumped by the pipeline to have sufficient time for mixing in the box body. Description of the Drawings

[0033] Figure 1 is a schematic diagram of the location of the secondary foam adding and mixing device during the pumping process of the foam lightweight soil disclosed by the present invention;

[0034] Figure 2 is a three-dimensional schematic diagram of the secondary foam adding and mixing device during the pumping process of the foam lightweight soil disclosed in the embodiment of the present invention;

[0035] Figure 3 is another three-dimensional schematic diagram of the secondary foam adding and mixing device during the pumping process of the foam lightweight soil disclosed in the embodiment of the present invention;

[0036] Figure 4 is a three-dimensional sectional schematic diagram of the secondary foam adding and mixing device during the pumping process of the foam lightweight soil disclosed in the embodiment of the present invention;

[0037] Figure 5 is a sectional schematic diagram of the secondary foam adding and mixing device during the pumping process of the foam lightweight soil disclosed in the embodiment of the present invention;

[0038] Figure 6 is a front view schematic diagram of the secondary foam adding and mixing device during the pumping process of the foam lightweight soil disclosed in the embodiment of the present invention;

[0039] Figure 7 is a left view schematic diagram of the secondary foam adding and mixing device during the pumping process of the foam lightweight soil disclosed in the embodiment of the present invention;

[0040] Figure 8 is a right view schematic diagram of the secondary foam adding and mixing device during the pumping process of the foam lightweight soil disclosed in the embodiment of the present invention;

[0041] Figure 9 is a top view schematic diagram of the secondary foam adding and mixing device during the pumping process of the foam lightweight soil disclosed in the embodiment of the present invention;

[0042] Figure 10It is a schematic structural diagram of the foam injection pipe of the secondary foaming and stirring device during the pumping process of the foam light soil disclosed in the embodiment of the present invention;

[0043] Among them, 1. Main drive shaft pulley, 2. Main drive shaft, 3. Driving gear, 4. Lower driven gear, 5. Upper driven gear, 6. Upper driven shaft, 7. Lower driven shaft, 8. Driving bearing ①, 9. Lower driven bearing ①, 10. Upper driven bearing ①, 11. Foam light soil output pipe, 12. Foam storage box, 13. Foam inlet box pipe, 14. Foam inlet pump pipe, 15. Foam pressurizing pump, 16. Foam outlet pump pipe, 17. Rotary joint, 18. Rotary joint fixing rod, 19. Foam light soil input pipe, 20. Box body, 21. Lower driven bearing ②, 22. Upper driven bearing ②, 23. Driving bearing ②, 24. Rotary joint bearing, 25. Upper stirring rod, 26. Lower stirring rod, 27. Foam injection pipe, 28. One-way plug, 29. Bracket, 30. Support plate, 31. Driving motor, 32. Motor pulley. Detailed implementation mode

[0044] The following combines the attached Figure 1-10 drawings and embodiments to further illustrate the present invention.

[0045] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration, and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0046] A secondary foaming and stirring device during the pumping process of foam light soil, as Figure 1 shown, is arranged in the middle of the pipeline for long-distance pumping of foam light soil. It is characterized in that the distance from the foam light soil preparation station is between 200 and 300 m. This secondary foaming and stirring device, as Figure 4 , 5 shown, includes: a box body 20, a main drive shaft 2, a foam injection pipe 27, a driven shaft, a stirring rod arranged in the box body 20, and a driving motor 31 arranged outside the box body 20.

[0047] The box body 20 is a cavity structure, and its specific shape can be any shape; specifically, it can be as Figure 2-9As shown, it is in the shape of a cuboid. The box body 20 has a foamed lightweight soil outlet and a foamed lightweight soil inlet; the foamed lightweight soil inlet is connected to the foamed lightweight soil input pipeline 19, and the foamed lightweight soil outlet is connected to the foamed lightweight soil output pipeline 11; the foamed lightweight soil enters the box body 20 through the pipeline via the foamed lightweight soil input pipeline 19, and then is output from the box body 20 to the pipeline through the foamed lightweight soil output pipeline 11.

[0048] The foamed lightweight soil outlet and the foamed lightweight soil inlet of the box body 20 are respectively arranged on opposite sides of the box body 20, and the foamed lightweight soil inlet is located below the foamed lightweight soil outlet. For example Figure 2-6 As shown, the foamed lightweight soil outlet is located on the left side wall of the box body 20, the foamed lightweight soil inlet is located on the right side wall of the box body 20, and the height of the foamed lightweight soil outlet is higher than the height of the foamed lightweight soil inlet.

[0049] The main transmission shaft 2 is of a hollow structure, one end of the main transmission shaft 2 is open, and the other end of the main transmission shaft 2 is closed. The open end of the main transmission shaft 2 is the foam inlet, and a foam outlet is also provided on the main transmission shaft 2; the foam enters the internal cavity of the main transmission shaft 2 from the inlet end of the main transmission shaft 2, and the foam is discharged from the foam outlet on the main transmission shaft 2.

[0050] In order to ensure that the foam can be smoothly injected when the main transmission shaft 2 rotates, it can also be as Figure 2-6 As shown, a rotary joint 17 is provided at the open end of the main transmission shaft 2 outside the box body 20. The rotary joint 17 is a container, the rotary joint 17 has a foam inlet and a foam outlet, and the foam outlet of the rotary joint 17 is internally connected to the main transmission shaft 2 through the open end of the main transmission shaft 2; the foam inlet of the rotary joint 17 is used to input foam. The rotary joint 17 can be connected to the open end of the main transmission shaft 2 through a bearing; the bearing is sleeved on the open end of the main transmission shaft 2 and is rotationally connected to the main transmission shaft 2, the bearing is installed at the foam outlet of the rotary joint 17, and the outer surface of the bearing is hermetically and statically connected to the rotary joint 17.

[0051] The foam inlet of the rotary joint 17, as Figure 2-6 As shown, it can be connected to the outlet of the foam pressurizing pump 15 through the foam outlet pump pipe 16, and the inlet of the foam pressurizing pump 15 is connected to the foam outlet of the foam storage box 12. The foam storage box and the foam pressurizing pump 15 can be arranged above the box body 20, such as directly above or in the middle position. The foam pressurizing pump 15 pumps the foam in the foam storage box 12 into the foam pressurizing pump 15 through the foam outlet of the foam storage box 12 for pressurization, and then inputs the foam into the rotary joint 17 through the foam outlet of the foam pressurizing pump 15 and the foam outlet pump pipe 16.

[0052] The main drive shaft 2 passes through opposite sides of the box body 20. Both ends (the open end and the sealed end) of the main drive shaft 2 are located outside the box body 20, and the middle part of the main drive shaft 2 is located inside the box body 20. At the position where the main drive shaft 2 passes through the wall of the box body 20, there is a seal between the main drive shaft 2 and the wall of the box body 20 to ensure that the lightweight foamed soil inside the box body 20 does not seep out from this position. At the position where the main drive shaft 2 passes through the wall of the box body 20, there is a movable connection between the main drive shaft 2 and the wall of the box body 20, so that the main drive shaft 2 rotates around the center line in its length direction. The movable connection between the main drive shaft 2 and the wall of the box body 20 can be realized through bearings; specifically, it can be as Figure 5 shown. The bearing is installed at the position where the main drive shaft 2 passes through the wall of the box body 20. There is a sealed and fixed connection between the outer surface of the bearing and the wall of the box body 20, and the main drive shaft 2 passes through the bearing and is rotationally connected to the bearing. On both sides of the box body 20 through which the main drive shaft 2 passes, specifically, it can be as Figure 2-6 shown, which are the two sides provided with the lightweight foamed soil output port and the lightweight foamed soil input port.

[0053] The foam injection pipe 27 is of a hollow structure. One end of the foam injection pipe 27 is open, and the other end of the foam injection pipe 27 can be open or closed. There are foam outlets provided on the foam injection pipe 27. The foam outlets can be arranged at the other end of the foam injection pipe 27, as Figure 10 shown. At this time, the other end of the foam injection pipe 27 is open. The open end of the foam injection pipe 27 is connected to the main drive shaft 2 and is internally communicated with the main drive shaft 2. The open end of the foam injection pipe 27 can be internally communicated with the main drive shaft 2 through the foam outlet on the main drive shaft 2. The foam inside the main drive shaft 2 enters the foam injection pipe 27 through the foam outlet on the main drive shaft 2 and the open end of the foam injection pipe 27, and then enters the box body 20 through the foam outlets on the foam injection pipe 27.

[0054] A one-way plug 28 is arranged at the foam outlet of the foam injection pipe 27 to enable the foam to be sprayed unidirectionally from inside the foam injection pipe 27, preventing the lightweight foamed soil inside the box body 20 from entering the foam outlet of the foam injection pipe 27 and blocking the foam outlet of the foam injection pipe 27. The one-way plug 28 can adopt any existing one-way valve.

[0055] The driven shaft passes through the box body 20. Both ends of the driven shaft are located outside the box body 20, and the middle part of the driven shaft is located inside the box body 20. At the position where the driven shaft passes through the wall of the box body 20, there is a seal between the driven shaft and the wall of the box body 20 to ensure that the lightweight foamed soil inside the box body 20 does not seep out from this position. At the position where the driven shaft passes through the wall of the box body 20, there is a movable connection between the driven shaft and the wall of the box body 20, so that the driven shaft rotates around the center line in its length direction. The movable connection between the driven shaft and the wall of the box body 20 can be realized through bearings; specifically, it can be as Figure 5As shown, the bearing is installed at the position where the driven shaft passes through the wall of the box body 20. The outer surface of the bearing is hermetically and fixedly connected to the wall of the box body 20, and the driven shaft passes through the bearing and is rotatably connected to the bearing.

[0056] Between the driven shaft and the main transmission shaft 2, as Figure 5 shown, they can be parallel and located in the same vertical plane. The driven shaft is located above or below the main transmission shaft 2. Specifically, as Figure 4 、 5 shown, there can be two driven shafts, namely the upper driven shaft 6 and the lower driven shaft 7; the upper driven shaft 6 is located above the main transmission shaft 2, and the lower driven shaft 7 is located below the main transmission shaft 2. The upper driven shaft 6 and the lower driven shaft 7 are parallel and located in the same vertical plane with the main transmission shaft 2.

[0057] The stirring rod is arranged on the driven shaft and rotates with the driven shaft. One end of the stirring rod is fixedly connected to the driven shaft and has an angle with the driven shaft; the angle of the angle can be 90°, that is, the stirring rod is perpendicular to the driven shaft. The stirring rod and the foam injection pipe 27 are staggered, and the plane where the stirring rod is located is parallel to and does not coincide with the plane where the foam injection pipe 27 is located. When there are two driven shafts, the stirring rods of the upper driven shaft 6 and the lower driven shaft 7 can be juxtaposed, that is, the stirring rods of the upper driven shaft 6 and the lower driven shaft 7 can be located in the same plane.

[0058] The driving motor 31 drives the main transmission shaft 2 or / and the driven shaft to rotate. Specifically, the way of using the driving motor 31 to drive the main transmission shaft 2 and the main transmission shaft 2 drives the driven shaft can be adopted. The specific way for the driving motor 31 to drive the main transmission shaft 2 to rotate can be as Figure 5 、 6 、7 shown. Outside the box body 20, a pulley is arranged at the sealed end of the main transmission shaft 2 and the outside of the gear. The pulley is sleeved on the main transmission shaft 2 and is fixedly connected to the main transmission shaft 2. Outside the box body 20, a gear is arranged at the sealed end of the main transmission shaft 2, and a gear is arranged at the corresponding end of the driven shaft. The sealed end of the main transmission shaft 2 and the driven shaft are meshed through the gear. The pulley of the main transmission shaft 2 is connected to the pulley of the driving motor 31 through a belt. The rotation of the pulley of the driving motor 31 drives the rotation of the pulley of the main transmission shaft 2, and then drives the rotation of the main transmission shaft 2. The main transmission shaft 2 drives the driven shaft to rotate through gear meshing. The driving motor 31 can be, as Figure 2 、 4 shown, arranged below the box body 20. Embodiment

[0059] A secondary foaming and stirring device during the pumping process of foamed lightweight soil includes a box body 20. A bracket 29 is installed at the lower part of the box body 20. A support plate 30 is arranged between the bracket 29 and the box body 20, and a driving motor 31 is placed on the support plate 30. A foamed lightweight soil input pipeline 19 is provided on the left side of the box body 20, and a foamed lightweight soil output pipeline 11 is provided on the right side. And in order to ensure that the foamed soil can be fully stirred after secondary foaming, the foamed lightweight soil input pipeline 19 must be located below the foamed lightweight soil output pipeline 11. A foam storage box 12 and a foam pressurizing pump 15 are located in the middle of the upper part directly above the box body 20 for facilitating the injection of foamed lightweight soil foam. A main transmission shaft 2, an upper driven shaft 6 and a lower driven shaft 7 are placed inside the box body 20. Two foam inlet pipes 13 can be provided at the top of the foam storage box 12. The foam pressurizing pump 15 and the foam storage box 12 are connected to each other through a foam inlet pump pipe 14. On the other side of the foam pressurizing pump 15, there is a foam outlet pump pipe 16 which is fixedly connected to a rotary joint 17. The main transmission shaft 2 is hollow, and a foam injection pipe 27 is provided on the main transmission shaft 2. The foam injection pipe 27 is hollow, and a one-way plug 28 is installed at the inner top end of the foam injection pipe 27 to ensure that the foam can be ejected from the foam injection pipe 27 smoothly and prevent the foamed lightweight soil from blocking the foam injection pipe 27. The main transmission shaft 2 is connected inside the box body 20 through a main driving bearing ①8 and a main driving bearing ②23. Outside the box body 20, the main transmission shaft 2, a main transmission shaft pulley 1 and a driving gear 3 are connected to each other through flat keys. And the driving gear 3 is closer to the box body 20 than the main transmission shaft pulley 1. The main transmission shaft 2 is connected to the rotary joint 17 through a rotary joint bearing 24 on the other side of the box body 20. The upper driven shaft 6 and the lower driven shaft 7 are respectively located on the upper and lower sides of the main transmission shaft 2. The upper stirring rods 25 on the upper driven shaft 6 and the lower stirring rods 26 on the lower driven shaft 7 can be arranged side by side and are staggered with the foam injection pipe 27 to achieve uniform stirring of the foamed lightweight soil. The upper driven shaft 6 is connected inside the box body 20 through an upper driven bearing ①10 and an upper driven bearing ②22. The lower driven shaft 7 is connected inside the box body 20 through a lower driven bearing ①9 and a lower driven bearing ②21. Outside the box body 20, an upper driven gear 5 is connected to the upper driven shaft 6 through a flat key. A lower driven gear 4 is connected to the lower driven shaft 7 through a flat key. The upper driven gear 5, the lower driven gear 4 and the driving gear 3 are meshed with each other, and the driven gears rotate as the driving gear 3 rotates, so as to realize the simultaneous foaming and stirring. On the side of the rotary joint 17 close to the box body 20, the rotary joint 17 is connected to the box body 20 through two rotary joint fixing rods 18, so that the rotary joint 17 can be fixed when the main transmission shaft 2 rotates and the foam can be smoothly injected when the main transmission shaft 2 rotates.

[0060] Secondary foaming during the pumping process of foamed lightweight soil and the specific working principle of the stirring device: This inventive device is installed in the middle of the pumping pipeline of foamed lightweight soil. To achieve good economic benefits and fully realize the functions of this inventive device, the distance between this inventive device and the foamed lightweight soil configuration station should be 200 - 300 m, and the distance to the final pouring site of foamed lightweight soil should also be 200 - 300 m. If this condition is not met, multiple such inventive devices can be considered to be installed in the middle of the pumping pipeline of foamed lightweight soil to ensure good performance throughout the pumping process of foamed lightweight soil. The pumped foamed lightweight soil enters the interior of the box body 20 through the foamed lightweight soil input pipeline 19. At the same time, the motor pulley 32 of the driving motor 31 drives the main transmission shaft pulley 1 through a belt, and then the driving gear 3 and the main transmission shaft 2 also start to rotate. Since the driving gear 3 meshes with the upper driven gear 5 and the lower driven gear 4, the three can achieve synchronous rotation, so the upper driven shaft 6, the main transmission shaft 2, and the lower driven shaft 7 can also achieve synchronous rotation. The foam generated by the foam generator is temporarily stored in the foam storage box 12, and then the foam enters the foam pressure pump 15 through the foam inlet pump pipe 14 to pressurize the foam. After pressurization, the foam enters the rotary joint 17 through the foam outlet pump pipe 16. Since the main transmission shaft 2 is hollow and is connected to the rotary joint 17 through the rotary joint bearing 24, it can be ensured that the rotary joint 17 remains stationary when the main transmission shaft 2 rotates, which is beneficial to the injection of pressurized foam. The pressurized foam is injected into the hollow main transmission shaft 2 through the rotary joint 17. The main transmission shaft 2 is connected to the foam injection pipe 27, and the pressurized foam is ejected from the foam injection pipe 27 into the box body 20 through the main transmission shaft 2 and is mixed with the foamed lightweight soil temporarily stored in the box body 20 to achieve secondary foaming of the foamed lightweight soil. The upper stirring rod 25 provided on the upper driven shaft 6, the lower stirring rod 26 provided on the lower driven shaft 7, and the foam injection pipe 27 on the main transmission shaft 2 are arranged in an interlaced manner. At the same time, the foam injection pipe 27 can also serve as a stirring rod, and the three cooperate with each other to fully stir the foamed lightweight soil in the box body 20. The original pumped foamed lightweight soil enters the box body 20 through the foamed lightweight soil input pipeline 19. Since the box body 20 is relatively large, the foamed lightweight soil can be stored therein for a short time. At the same time, the pressurized foam is sprayed into the interior of the box body 20 through the foam injection pipe 27 and is mixed with the foamed lightweight soil stored therein. The main transmission shaft 2, the upper driven shaft 6, and the lower driven shaft 7 rotate synchronously, respectively driving the foam injection pipe 27, the upper stirring rod 25, and the lower stirring rod 26 to rotate. The three cooperate with each other to fully stir and mix evenly the foamed lightweight soil with secondary foaming in the box body 20. As time goes by, the volume of the foamed lightweight soil in the box body 20 increases. When it approaches the foamed lightweight soil output pipeline 11 on the upper side of the box body 20, the suction pump provided in the foamed lightweight soil pumping pipeline uses this inventive device to suck out the foamed lightweight soil that has completed secondary foaming and full stirring and continue the pumping process.Note that the above process has no time interval and is a continuous process. That is, only when the foamed lightweight soil starts to be pumped, the foamed lightweight soil will stay in the box 20 briefly, which will cause the output pipeline 11 of the foamed lightweight soil to have no foamed lightweight soil in the pumping state. However, at any other moment, the foamed lightweight soil is continuously pumped in any pipeline. In addition, to ensure economic benefits, the optimal installation distance between this invention equipment and the initial foamed lightweight soil preparation station is 200 - 300m, and the distance from the equipment to the final pouring location of the foamed lightweight soil should also be 200 - 300m. If the distance exceeds this range, multiple such devices can be reasonably set in the middle of the foamed lightweight soil pumping pipeline to meet the economic principle as much as possible under the premise of meeting the performance of the foamed lightweight soil.

[0061] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made without creative efforts by those skilled in the art are still within the protection scope of the present invention.

Claims

1. Secondary foaming and stirring device during the pumping process of foamed lightweight soil, Characterized in that, Comprising: A box body, having a foamed lightweight soil outlet and a foamed lightweight soil inlet; The foamed lightweight soil outlet and the foamed lightweight soil inlet are respectively arranged on opposite sides of the box body, and the foamed lightweight soil inlet is located below the foamed lightweight soil outlet; The main drive shaft, which is of a hollow structure, has an open end at one end and is configured as a foam inlet, and the other end is closed; the main drive shaft is arranged inside the box body, and its open end and sealed end pass through opposite sides of the box body and are located outside the box body; the main drive shaft is sealed with the wall of the box body and rotates around the center line in its length direction; A rotary joint and a rotary joint bearing; the rotary joint is connected to the open end of the main drive shaft through the rotary joint bearing and is in communication with the inside of the main drive shaft; the rotary joint has a foam inlet; A foam injection pipe, which is of a hollow structure and has an open end at one end; the open end of the foam injection pipe is connected to the main drive shaft and is in communication with the inside of the main drive shaft; the foam injection pipe is provided with a foam outlet; A one-way plug, which is arranged at the foam outlet of the foam injection pipe to enable the foam to be ejected unidirectionally from the inside of the foam injection pipe to the outside; A driven shaft, which is arranged inside the box body, has both ends passing through the box body and is located outside the box body, and is sealed with the wall of the box body; the driven shaft rotates around the center line in its length direction; the driven shaft is located above or below the main drive shaft; A stirring rod, one end of which is connected to the driven shaft and has an included angle with the driven shaft; the stirring rod and the foam injection pipe are arranged in a staggered manner; A driving motor, which drives the main drive shaft and the driven shaft to rotate; A foam storage box and a foam pressure pump; the foam storage box and the foam pressure pump are located above the box body, and the foam storage box is provided with a foam outlet; the inlet of the foam pressure pump is communicated with the foam outlet of the foam storage box, and the outlet of the foam pressure pump is communicated with the foam inlet of the main drive shaft.

2. The secondary foaming and stirring device during the pumping process of foamed lightweight soil according to claim 1, Characterized in that, Both ends of the main drive shaft respectively pass through the two sides of the box body where the foamed lightweight soil outlet and the foamed lightweight soil inlet are arranged.

3. The secondary foaming and stirring device during the pumping process of foamed lightweight soil according to claim 1, Characterized in that, The foam outlet is located at the other end of the foam injection pipe.

4. The secondary foaming and stirring device during the pumping process of foamed lightweight soil according to claim 1, Characterized in that, The driven shaft is divided into an upper driven shaft and a lower driven shaft; the upper driven shaft is located above the main drive shaft, and the lower driven shaft is located below the main drive shaft.

5. The secondary foaming and stirring device during the pumping process of foamed lightweight soil according to claim 4, Characterized in that, The stirring rods of the upper driven shaft and the stirring rods of the lower driven shaft are arranged side by side.

6. The secondary foaming and stirring device during the pumping process of foamed lightweight soil according to claim 1, Characterized in that, The included angle between the stirring rod and the driven shaft is 90°.

7. The secondary foaming and stirring device during the pumping process of foamed lightweight soil according to claim 1, characterized in that, the driven shaft is parallel to the main drive shaft and located in the same plane.

8. The secondary foaming and stirring device during the pumping process of foamed lightweight soil according to claim 1, characterized in that, the main drive shaft is connected to the wall of the box body through a bearing; the driven shaft is connected to the wall of the box body through a bearing; outside the box body, the sealed end of the main drive shaft is meshed with the driven shaft through a gear; the drive motor drives the main drive shaft.

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