Cement mixing pile

Abstract

The application discloses a cement mixing pile, which comprises a mixing unit and a control valve arranged in the interior of a mixing shaft for controlling the cement slurry injection speed according to the rotating speed; the mixing unit comprises lower blades, middle blades and upper blades arranged in sequence from bottom to top on the outer side of the mixing shaft for mixing the cement and soft soil; the adjusting unit comprises an adjusting assembly arranged on the upper end of the mixing unit for lifting and adjusting the mixing unit, and a supporting assembly arranged on one side of the adjusting assembly for supporting and angle adjusting the adjusting assembly; the opening size is automatically controlled by the control valve according to the rotating speed of the mixing shaft; the larger the rotating speed of the mixing shaft is, the larger the opening of the control valve is, and the faster the cement slurry injection speed of the lower part of the middle blades is; the smaller the rotating speed of the mixing shaft is, the smaller the opening of the control valve is, and the slower the cement slurry injection speed of the lower part of the middle blades is; the cement slurry mixed in the soft soil is prevented from being too much in the area with large mixing resistance, so that the mixing ratio of the soft soil and the cement slurry is not out of balance.

Description

Technical Field

[0001] This invention relates to the field of building foundation treatment technology, specifically to a cement mixing pile. Background Technology

[0002] Cement mixing piles are one of the core technologies for soft soil foundation reinforcement. Their core principle is to forcibly mix cement slurry with in-situ soft soil through mixing equipment to form a cement-soil composite with certain strength and integrity, thereby improving the mechanical properties of soft soil and meeting the engineering bearing requirements. The current construction process of cement mixing piles relies mainly on manual experience for control, and cannot automatically adjust the grouting flow rate according to the mixing resistance. This results in unstable construction quality, high rework rate, and inability to achieve precise control of the construction process. In addition, the blade design of existing cement mixing piles is simple, making it difficult for cement slurry and soft soil to be fully mixed in deep soil. This easily leads to "dry areas," "wet areas," and "clumping" phenomena, resulting in large differences in the internal strength distribution of the pile body. Insufficient strength in some areas affects the overall bearing capacity and durability of the pile body, and long-term use is prone to problems such as pile cracking and damage.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a cement mixing pile to solve the problems mentioned in the background art of existing cement mixing piles, such as the difficulty in achieving sufficient mixing of cement slurry and soft soil in deep soil and the inability to automatically adjust the grouting flow rate according to the mixing resistance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A cement mixing pile, comprising: The mixing unit includes a lower blade, a middle blade, and an upper blade arranged sequentially from bottom to top on the outside of the mixing shaft for mixing cement and soft soil, and a control valve located inside the mixing shaft for controlling the cement slurry injection speed according to the rotation speed. The adjustment unit includes an adjustment component located at the upper end of the stirring unit for adjusting the height of the stirring unit, and a support component located on one side of the adjustment component for supporting the adjustment component and adjusting its angle.

[0006] Furthermore, the lower blade is fixedly connected to a plurality of scooping blocks on one side of the rotation direction. The scooping blocks are triangular in shape and are used to scoop up soft soil. The inclined surface at the upper end of the shovel block is fixedly connected with multiple arc-shaped protrusions, which are used to lift up the soft soil after shoveling.

[0007] Furthermore, the middle blade is provided with a flow-collecting hole, which communicates with the interior of the stirring shaft and is used to discharge the cement slurry inside the stirring shaft; The lower end of the middle blade is provided with multiple second injection ports at equal intervals, which are used to spray the cement slurry in the confluence hole toward the soft soil that is lifted by the arc-shaped protrusion. The lower blade, middle blade, and upper blade are arranged alternately in pairs.

[0008] Furthermore, the interior of the stirring shaft is provided with a receiving groove for accommodating the control valve; The lower end of the control valve, located inside the receiving tank, is equipped with a diversion block to divert the cement discharged from the control valve.

[0009] Furthermore, the control valve has a main flow hole vertically arranged in the middle inside, and the main flow hole is connected to the outlet end of the control valve; The first diversion hole is located inside the upper part of the diversion block. One end of the first diversion hole is connected to the main flow hole, and the other end is connected to the confluence hole. The stirring shaft has an upper outlet located inside the confluence hole and between the first branch hole; The mixing shaft has a first injection port located at the lower part of its interior, which is connected to the lower end of the main flow hole. This port is used in conjunction with the second injection port to spray and mix cement slurry onto the soft soil that is raised by the arc-shaped protrusion. A second diversion hole is provided between the main flow hole and the first injection port, and inside the diversion block.

[0010] Furthermore, the control valve includes: The valve body is fixedly connected to the upper end of the flow divider block and located inside the receiving groove. A flow hole is provided through the valve body from top to bottom, and the lower end of the flow hole is connected to the main flow hole. A stop block is slidably inserted inside the valve body to control the flow rate of cement slurry in the flow control. The valve body and the stop block are provided with a guide groove for accommodating and retracting the stop block. A guide shaft is fixedly connected to one end of the stop block, and the guide shaft is slidably inserted into the inside of the valve body; A clamping spring is sleeved on the outside of the guide shaft and located between the stop block and the guide groove, used to clamp the stop block. A limiting block is fixedly connected to one end of the guide shaft opposite to the stop block. The limiting block is located on the outside of the valve body and is used to limit the movement of the stop block. A delivery pipe, installed at the upper end of the valve body and connected to the flow hole, is used to input cement into the flow hole.

[0011] Furthermore, two sets of the stop blocks are provided opposite each other, and there is a gap between the two sets of stop blocks when the limiting block contacts one side of the valve body.

[0012] Furthermore, the support component includes: Base plate; The support legs are provided in four sets, and are respectively installed at the corners of the base plate; The hydraulic cylinder is hinged at one end to the upper end of the base plate and at the other end to one side of the adjustment assembly, and is used to adjust the angle of the adjustment assembly.

[0013] Furthermore, the adjustment component includes: The column is hinged at its lower end to the base plate; A drive motor is installed on the upper part of the column, and a screw is connected to the drive end of the drive motor; The guide rod is provided in two sets, located on one side of the column. The upper and lower ends of the guide rod are rotatably connected to the fixing block, and one end of the fixing block is fixedly connected to the column. The lifting block is slidably connected to the guide rod. A lead screw block is fixedly connected to one side of the lifting block and between the two sets of guide rods. The lead screw block is threadedly connected to the screw rod.

[0014] Furthermore, an input pipe is provided on one side of the fixing block, and a motor is provided inside the fixing block; A rotating shaft is installed at the lower end of the fixed block, a stirring shaft is installed at the lower end of the rotating shaft, and the rotating shaft is installed at the lower end of the motor inside the fixed block; The rotating shaft has a pipe inside, one end of which is connected to the input pipe and the other end of which is connected to the delivery pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention places a support assembly in the construction area, which drives an adjusting assembly to rotate to a vertical position, positioning the mixing unit directly above the mixing area. The mixing unit is then activated, and its mixing shaft drives the lower, middle, and upper blades to rotate. Simultaneously, the adjusting assembly moves the mixing shaft downwards into the soft soil. A control valve automatically adjusts its opening size based on the mixing shaft's rotation speed. Higher shaft speeds result in a larger valve opening and faster cement slurry spraying from the lower part of the middle blades. Conversely, lower shaft speeds result in a smaller valve opening and slower cement slurry spraying from the lower part of the middle blades. This prevents excessive cement slurry from mixing into the soft soil in areas with high mixing resistance, thus avoiding an imbalance in the mixing ratio of soft soil to cement slurry. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a diagram showing the coordination relationship between the adjustment component and the stirring unit of the present invention; Figure 3 This is a schematic diagram of the adjustment component structure of the present invention; Figure 4 This is a schematic diagram of the stirring unit structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the stirring shaft of the present invention; Figure 6 For the present invention in Figure 5 Enlarged view of point A in the middle.

[0017] Reference numerals: 1. Adjustment unit; 11. Support assembly; 111. Base plate; 112. Support leg; 113. Hydraulic cylinder; 12. Adjustment assembly; 121. Column; 1211. Fixing block; 1212. Reinforcing block; 122. Drive motor; 123. Screw; 124. Lifting block; 1241. Lead screw block; 1242. Input pipe; 125. Guide rod; 126. Rotating shaft; 2. Stirring unit; 21. Stirring shaft; 211. Receiving tank; 212. First injection port; 213. Upper outlet ; 22. Lower blade; 221. Hoeing block; 222. Arc-shaped protrusion; 23. Middle blade; 231. Manifold; 232. Second injection port; 24. Upper blade; 25. Connector; 26. Control valve; 261. Valve body; 2611. Guide groove; 2612. Flow hole; 262. Stop block; 263. Guide shaft; 264. Tightening spring; 265. Limiting block; 266. Delivery pipe; 27. Diverting block; 271. Main flow hole; 272. First diverting hole; 273. Second diverting hole. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-6 The present invention provides a technical solution: A cement mixing pile, comprising: The mixing unit 2 includes a lower blade 22, a middle blade 23, and an upper blade 24 arranged sequentially from bottom to top on the outside of the mixing shaft 21 for mixing cement and soft soil, and a control valve 26 located inside the mixing shaft 21 for controlling the cement slurry injection speed according to the rotation speed. The adjustment unit 1 includes an adjustment component 12 disposed at the upper end of the stirring unit 2 for adjusting the height of the stirring unit 2, and a support component 11 disposed on one side of the adjustment component 12 for supporting the adjustment component 12 and adjusting its angle.

[0020] It should be noted that when mixing soft soil and concrete in the foundation, the support assembly 11 is placed in the construction area, and the support assembly 11 drives the adjustment assembly 12 to rotate to a vertical position, so that the mixing unit 2 is directly above the mixing area. The mixing unit 2 is started, and the mixing unit 2 drives the lower blade 22, middle blade 23 and upper blade 24 to rotate through the mixing shaft 21. At the same time, the adjustment assembly 12 drives the mixing shaft 21 to move downward into the soft soil. The control valve 26 automatically controls the opening size according to the rotation speed of the mixing shaft 21. The higher the rotation speed of the mixing shaft 21, the larger the opening of the control valve 26, and the faster the cement slurry is sprayed from the lower part of the middle blade 23. The lower the rotation speed of the mixing shaft 21, the smaller the opening of the control valve 26, and the slower the cement slurry is sprayed from the lower part of the middle blade 23. This avoids excessive cement slurry mixed into the soft soil in areas with high mixing resistance, which would cause an imbalance in the mixing ratio of soft soil and cement slurry.

[0021] As an improvement, such as Figure 4 As shown, the lower blade 22 is fixedly connected to a plurality of scooping blocks 221 on one side of the rotation direction. The scooping blocks 221 are triangular in shape and are used to scoop up soft soil. The inclined surface at the upper end of the shovel block 221 is fixedly connected with multiple arc-shaped protrusions 222, which are used to lift up the soft soil after shoveling.

[0022] Furthermore, such as Figure 5-6 As shown, the middle blade 23 is provided with a confluence hole 231, which communicates with the interior of the stirring shaft 21 and is used to discharge the cement slurry inside the stirring shaft 21. The lower end of the middle blade 23 is provided with a plurality of second injection ports 232 at equal intervals, which are used to spray the cement slurry in the confluence hole 231 toward the soft soil that is lifted by the arc-shaped protrusion 222. The lower blade 22, middle blade 23, and upper blade 24 are arranged alternately in pairs.

[0023] Furthermore, the interior of the stirring shaft 21 is provided with a receiving groove 211 for accommodating the control valve 26; The lower end of the control valve 26 and inside the receiving tank 211 is provided with a diversion block 27, which is used to divert the cement discharged from the control valve 26.

[0024] The control valve 26 has a main flow hole 271 vertically arranged in the middle inside, and the main flow hole 271 is connected to the outlet end of the control valve 26. The first diversion hole 272 is located inside the upper part of the diversion block 27. One end of the first diversion hole 272 is connected to the main flow hole 271, and the other end is connected to the confluence hole 231. An upper outlet 213 is provided inside the stirring shaft 21 and between the confluence hole 231 and the first diversion hole 272; The mixing shaft 21 has a first injection port 212 located at the lower part of its interior, which is connected to the lower end of the main flow hole 271. This port is used to cooperate with the second injection port 232 to spray and mix the soft soil raised by the arc-shaped protrusion 222 with cement slurry. A second diversion hole 273 is provided between the main flow hole 271 and the first injection port 212 and inside the diversion block 27.

[0025] In addition, such as Figure 5-6 As shown, the control valve 26 includes: The valve body 261 is fixedly connected to the upper end of the diverter block 27 and located inside the receiving groove 211. A flow hole 2612 is provided through the valve body 261 from top to bottom. The lower end of the flow hole 2612 is connected to the main flow hole 271. The stop block 262 is slidably inserted into the inside of the valve body 261 to control the flow rate of cement slurry in the flow control. The valve body 261 and the inside of the stop block 262 are provided with a guide groove 2611 for accommodating and retracting the stop block 262. A guide shaft 263 is fixedly connected to one end of the stop block 262, and the guide shaft 263 is slidably inserted into the inside of the valve body 261. A clamping spring 264 is sleeved on the outside of the guide shaft 263 and located between the stop block 262 and the guide groove 2611, and is used to clamp the stop block 262. A limiting block 265 is fixedly connected to one end of the guide shaft 263 opposite to the stop block 262. The limiting block 265 is located on the outside of the valve body 261 and is used to limit the movement of the stop block 262. The delivery pipe 266 is installed at the upper end of the valve body 261 and connected to the flow hole 2612, and is used to input cement into the flow hole 2612.

[0026] Furthermore, such as Figure 6 As shown, two sets of stop blocks 262 are provided opposite each other, and there is a gap between the two sets of stop blocks 262 when the limiting block 265 contacts one side of the valve body 261.

[0027] As an improvement, such as Figure 1 As shown, the support component 11 includes: Base plate 111; The support legs 112 are provided in four sets, and are respectively installed at the corners of the base plate 111; The hydraulic cylinder 113 is hinged at one end to the upper end of the base plate 111 and at the other end to one side of the adjustment assembly 12, and is used to adjust the angle of the adjustment assembly 12.

[0028] Furthermore, such as Figure 1-3 As shown, the adjustment component 12 includes: The lower end of the column 121 is hinged to the base plate 111; A drive motor 122 is installed on the upper part of the column 121, and a screw 123 is connected to the drive end of the drive motor 122. The guide rod 125 is provided in two sets and is located on one side of the column 121. The upper and lower ends of the guide rod 125 are rotatably connected to the fixing block 1211, and one end of the fixing block 1211 is fixedly connected to the column 121. The lifting block 124 is slidably connected to the guide rod 125. A lead screw block 1241 is fixedly connected to one side of the lifting block 124 and between the two sets of guide rods 125. The lead screw block 1241 is threadedly connected to the screw 123.

[0029] Furthermore, an input pipe 1242 is provided on one side of the fixing block 1211, and a motor is provided inside the fixing block 1211; The lower end of the fixed block 1211 is equipped with a rotating shaft 126, the stirring shaft 21 is installed at the lower end of the rotating shaft 126, the rotating shaft 126 is installed at the lower end of the motor inside the fixed block 1211, and the upper end of the stirring shaft 21 is provided with a connector 25 that matches the mounting hole at the lower end of the rotating shaft 126. The rotating shaft 126 has a pipe inside, one end of which is connected to the input pipe 1242 and the other end of which is connected to the delivery pipe 266; Preferably, a reinforcing block 1212 is fixedly connected to one side of the column 121, and the reinforcing block 1212 is rotatably connected to the outside of the rotating shaft 126 for reinforcing the rotating shaft 126.

[0030] It should be added that the base plate 111 in this invention can be installed on an engineering vehicle, which is not shown in the figure.

[0031] It should be noted that: in the specific implementation process of this invention, such as Figure 1-3As shown, the base plate 111 installed on the engineering vehicle is transported to the construction area, and the base plate 111 is supported on the ground by the outriggers 112. The hydraulic cylinder 113 is controlled to drive the column 121 to rotate to a vertical position. At this time, the mixing unit 2 is located directly above the soft soil area to be mixed. The drive motor 122 is started, and the drive motor 122 drives the screw 123 to rotate. Under the action of the thread tangential force between the screw 123 and the lead screw block 1241, the lifting block 124 is driven to slide down along the screw 123. The lifting block 124 drives the mixing unit 2 to move down into the soft soil, completing the adjustment of the mixing unit 2. like Figure 1 , Figure 5 As shown, at this time, the motor inside the lifting block 124 is started. The motor drives the stirring shaft 21 to rotate through the rotating shaft 126. The stirring shaft 21 synchronously drives the lower blade 22, the middle blade 23 and the upper blade 24 to rotate synchronously. At the same time, the external cement slurry is transported to the valve body 261 through the input pipe 1242, the pipe inside the rotating shaft 126 and the conveying pipe 266 in sequence. When the stirring shaft 21 does not rotate or rotates at low speed due to stirring resistance, the valve body 261 can continuously release a small amount of cement slurry through the opening between the baffles 262. Part of the released cement slurry is sprayed out through the main flow hole 271, the first diversion hole 272, the upper outlet 213, the confluence hole 231 and the second spray hole 232 in sequence. The other part of the cement slurry is sprayed out through the main flow hole 271, the second diversion hole 273 and the first spray hole 212 in sequence, thereby avoiding the cement slurry from staying in the conveying pipe 266 for a long time and causing pipe blockage. like Figure 4-6 As shown, when the stirring shaft 21 rotates at high speed, the stop block 262 gradually compresses the top spring 264 under the action of a large centrifugal force, which increases the gap between the two sets of stop blocks 262. At this time, the speed at which the cement slurry enters the main flow hole 271 increases, so that while the middle blade 23 rotates, the second injection port 232 quickly sprays the cement slurry downward, and the first injection port 212 also quickly sprays the cement slurry outward. In this process, the spray trajectory of the cement slurry at the second injection port 232 and the first injection port 212 forms a closed loop, which fully mixes with the soft soil lifted by the arc-shaped protrusion 222, achieving the effect of full mixing of cement slurry and soft soil, and avoiding the phenomenon of pile cracking and damage caused by uneven mixing of cement slurry and soft soil in the future.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cement mixing pile, characterized in that, include: The mixing unit (2) includes a lower blade (22), a middle blade (23), and an upper blade (24) arranged sequentially from bottom to top on the outside of the mixing shaft (21) for mixing cement and soft soil, and a control valve (26) located inside the mixing shaft (21) for controlling the cement slurry injection speed according to the rotation speed. The adjustment unit (1) includes an adjustment component (12) disposed at the upper end of the stirring unit (2) for adjusting the stirring unit (2) by raising and lowering, and a support component (11) disposed on one side of the adjustment component (12) for supporting the adjustment component (12) and adjusting its angle.

2. A cement mixing pile according to claim 1, characterized in that: The lower blade (22) is fixedly connected to a plurality of scooping blocks (221) on one side of the rotation direction. The scooping blocks (221) are triangular in shape and are used to scoop up soft soil. The inclined surface at the upper end of the shovel block (221) is fixedly connected with multiple arc-shaped protrusions (222) for lifting up the soft soil after shoveling.

3. A cement mixing pile according to claim 2, characterized in that: The middle blade (23) is provided with a confluence hole (231), which is connected to the inside of the stirring shaft (21) and is used to discharge the cement slurry inside the stirring shaft (21); The lower end of the middle blade (23) is provided with multiple second injection ports (232) at equal intervals, which are used to spray the cement slurry in the confluence hole (231) toward the soft soil that is lifted by the arc-shaped protrusion (222); The lower blade (22), middle blade (23), and upper blade (24) are arranged alternately in pairs.

4. A cement mixing pile according to claim 3, characterized in that: The stirring shaft (21) is provided with a receiving groove (211) for accommodating the control valve (26); The lower end of the control valve (26) and inside the receiving tank (211) is provided with a diversion block (27) for diverting the cement discharged from the control valve (26).

5. A cement mixing pile according to claim 4, characterized in that: The control valve (26) has a main flow hole (271) vertically arranged in the middle inside, and the main flow hole (271) is connected to the outlet end of the control valve (26); The first diversion hole (272) is located inside the upper part of the diversion block (27). One end of the first diversion hole (272) is connected to the main flow hole (271), and the other end is connected to the confluence hole (231). The stirring shaft (21) is provided with an upper outlet (213) inside and between the confluence hole (231) and the first diversion hole (272); The mixing shaft (21) has a first injection port (212) connected to the lower end of the main flow hole (271) at the bottom, which is used to cooperate with the second injection port (232) to spray and mix the soft soil raised by the arc protrusion (222) with cement slurry. A second diversion hole (273) is provided between the main flow hole (271) and the first injection port (212) and inside the diversion block (27).

6. A cement mixing pile according to claim 5, characterized in that: The control valve (26) includes: The valve body (261) is fixedly connected to the upper end of the diverter block (27) and located inside the receiving groove (211). A flow hole (2612) is provided through the valve body (261) from top to bottom. The lower end of the flow hole (2612) is connected to the main flow hole (271). A stop block (262) is slidably inserted into the inside of the valve body (261) to control the flow rate of cement slurry in the flow control. The valve body (261) and the inside of the stop block (262) are provided with a guide groove (2611) for accommodating and retracting the stop block (262). A guide shaft (263) is fixedly connected to one end of the stop block (262), and the guide shaft (263) is slidably inserted into the inside of the valve body (261); A clamping spring (264) is sleeved on the outside of the guide shaft (263) and located between the stop block (262) and the guide groove (2611) to clamp the stop block (262); A limiting block (265) is fixedly connected to one end of the guide shaft (263) relative to the stop block (262). The limiting block (265) is located on the outside of the valve body (261) and is used to limit the movement of the stop block (262). A delivery pipe (266) is installed at the upper end of the valve body (261) and connected to the flow hole (2612) for feeding cement into the flow hole (2612).

7. A cement mixing pile according to claim 6, characterized in that: Two sets of stop blocks (262) are provided opposite to each other. When the limiting block (265) contacts one side of the valve body (261), there is a gap between the two sets of stop blocks (262).

8. A cement mixing pile according to claim 1, characterized in that: The support component (11) includes: Base plate (111); The outriggers (112) are provided in four sets, which are respectively installed at the corners of the base plate (111); The hydraulic cylinder (113) is hinged at one end to the upper end of the base plate (111) and at the other end to one side of the adjustment assembly (12), and is used to adjust the angle of the adjustment assembly (12).

9. A cement mixing pile according to claim 8, characterized in that: The adjustment component (12) includes: The column (121) is hinged at its lower end to the base plate (111); A drive motor (122) is installed on the upper part of the column (121), and a screw (123) is connected to the drive end of the drive motor (122); The guide rod (125) is provided in two sets and is located on one side of the column (121). The upper and lower ends of the guide rod (125) are rotatably connected to the fixing block (1211), and one end of the fixing block (1211) is fixedly connected to the column (121). The lifting block (124) is slidably connected to the guide rod (125) in the upper and lower directions. A lead screw block (1241) is fixedly connected to one side of the lifting block (124) and between the two sets of guide rods (125). The lead screw block (1241) is threadedly connected to the screw (123).

10. A cement mixing pile according to claim 9, characterized in that: An input pipe (1242) is provided on one side of the fixing block (1211), and a motor is provided inside the fixing block (1211); A rotating shaft (126) is installed at the lower end of the fixed block (1211), and a stirring shaft (21) is installed at the lower end of the rotating shaft (126). The rotating shaft (126) is installed at the lower end of the motor inside the fixed block (1211). The rotating shaft (126) has a pipe inside, one end of which is connected to the input pipe (1242) and the other end of which is connected to the delivery pipe (266).

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