A method for shaftless pumping of concrete in ultra-high-rise buildings with push-belt compensation and staged full-load pumping

Abstract

This invention discloses a method for pumping concrete in ultra-high-rise buildings using a shaftless pump with compensation and progressive full-load pumping. The method includes: placing a concrete feeder on the ground and sequentially connecting a delivery pipe and a grouting hose to the feeder; activating the power component, pressure sensor, and speed sensor of the booster assembly on the shaftless pump multi-stage booster device; using the monitoring data from the pressure and speed sensors to progressively adjust the rotational speed of the booster assembly on the shaftless pump multi-stage booster device; and pumping concrete to the corresponding location on the high-rise building using the concrete feeder; determining the boosted pressure value based on the monitoring data; and distributing the boosted pressure value to the booster assembly on the shaftless pump multi-stage booster device using a progressive full-load boosting method to determine the rotational speed of the booster assembly. The advantages of this invention are: continuous monitoring of the outlet pressure of the shaftless pump multi-stage booster device, cyclic compensation and adjustment of the blade speed to ensure pressure meets requirements and remains stable.

Description

Technical Field

[0001] This invention relates to the technical field of ultra-high-rise pumped concrete pipeline transportation, and in particular to a shaftless pump pusher-compensated step-by-step full-load pumping method for ultra-high-rise pumped concrete. Background Technology

[0002] With the development of urban construction, the number of super high-rise buildings is increasing, and the challenges of vertical transportation of building materials in super high-rise construction are becoming increasingly severe. Besides the issue of concrete mix proportions, the main technical difficulties in pumping concrete in super high-rise buildings stem from the conveying capacity of the concrete pumping equipment and pipelines. When the building height reaches 300m or even 500m or more, concrete pumping becomes increasingly difficult. Furthermore, the construction of super high-rise buildings typically uses high-strength, high-performance concrete, and the increased strength of the concrete material further intensifies the challenges to the pumping system. If the pumping system is not properly configured during construction, pipe blockages are highly likely; or if the pumping pressure does not meet the height requirements, it will cause construction to stop and incur high costs. Therefore, the performance of the selected pumping equipment, the layout of the pumping system, and related operating procedures are crucial for achieving ultra-high pressure pumping.

[0003] Currently, there are few domestic methods for ultra-high pressure pumping, pumping systems are lacking, conventional pumping processes are imperfect, concrete pumping is uncontrollable, and incidents such as insufficient pumping pressure and pipe blockage are prone to occur during high-rise pumping. In conventional ultra-high-rise construction projects, ultra-high pressure pumps and relay pumping methods are usually used. For example, patent number CN 115680285A, "An Ultra-High-Rise Concrete Pumping System and Construction Method," uses an ultra-high pressure pump set to provide enormous pressure for pumping concrete. Regarding relay pumping methods and devices, patent number CN 111622779 A, ​​"A Pulse-type Pressure Compensation Long-Distance Concrete Conveying Device and Its Usage Method," arranges several pneumatic booster pumps at intervals on the conveying pipeline. The air outlet of the pneumatic booster pump is connected to the conveying pipeline to compensate for the pushing pressure lost by the concrete during conveying, so as to keep the concrete pressure in the entire conveying pipeline stable and realize long-distance concrete conveying. Patent number CN 103541550 A, "A Construction Pumping System for Steel Pipe Concrete in Super High-Rise Buildings," connects a high-pressure pump to the discharge port and a low-pressure pump to the pouring hose. The two concrete pumps relay each other to achieve the purpose of pumping in super high-rise buildings. Although existing technologies have solved some problems of insufficient pumping pressure and relay pumping of concrete in high-rise buildings, the following problems still exist: (1) For long-distance and ultra-high-rise pumping, the pressure of high-pressure pumps is high, the performance and cost of high-pressure pumps are high, the performance requirements of adjacent pressure pump pipelines are high, the equipment cost is increased, and the construction safety is low; (2) Traditional pressure pumps provide intermittent pumping pressure, which can easily cause blockage of the delivery pipeline; (3) Traditional pressure pumps have greater vibration and noise, which is not conducive to environmental protection; (4) Traditional pressure pumps cannot achieve multi-stage pressurization; (5) The pumping method for ultra-high-rise pouring is difficult to ensure stable pouring pressure, which affects the quality of pouring. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a shaftless pump-driven, compensated, staged full-load pumping method for ultra-high-rise concrete pumping. This method involves assembling a shaftless pump-driven multi-stage pressurization device on the delivery pipe. In previous high-rise concrete pumping methods, the shaftless pump-driven multi-stage pressurization device had blades on its inner wall. Pressure sensors monitored pressure changes and determined the blade rotation speed in real time. A motor drove the bladed steel cylinder to rotate, and the high-speed rotating blades provided pressure to the concrete, achieving the pressurization purpose. Through multi-stage pressurization components, the concrete pumping pressure was gradually increased to ensure that the concrete pumping pressure met the requirements, thus guaranteeing the construction quality of the pouring. Simultaneously, pressure sensors monitored the concrete outlet pressure of the multi-stage pressurization components and cyclically adjusted the compensating blade rotation speed in real time to ensure pressure stability. Furthermore, the shaftless pump-driven multi-stage pressurization device was connected to the delivery pipe through a buffer component to buffer the concrete pressure and pressurization impact load, ensuring the safety and stability of the delivery pipe.

[0005] The objective of this invention is achieved through the following technical solutions:

[0006] A method for shaftless pumping of concrete in ultra-high-rise buildings with compensated, staged full-load pumping, characterized in that the pumping method includes:

[0007] A concrete feeder is placed on the ground, and a delivery pipe and a grouting hose are connected to the concrete feeder in sequence so that the grouting hose extends to the corresponding position of the high-rise building. A shaftless pump-driven multi-stage pressurization device is arranged on the delivery pipe. The shaftless pump-driven multi-stage pressurization device includes a multi-stage pressurization assembly, two buffer assemblies, and two connecting pipes. The pressurization assemblies are connected in sequence. The first-stage pressurization assembly and the last-stage pressurization assembly are respectively connected to the two buffer assemblies, and the two buffer assemblies are respectively connected to the two connecting pipes. The pressurization assembly includes a cylindrical protective cover, a rotor assembly, a power assembly installed inside the cylindrical protective cover, and support end caps located at both ends of the rotor assembly and the power assembly. The power assembly drives the rotor assembly to rotate. Blades, a pressure sensor, and a speed sensor are provided on the inner wall of the rotor assembly.

[0008] The power component, pressure sensor, and speed sensor of the booster assembly on the shaftless pump multi-stage booster device are activated. The rotational speed of the booster assembly is adjusted step-by-step using monitoring data from the pressure and speed sensors, and the concrete is pumped to the corresponding location on the high-rise building via the concrete mixer. The booster value is determined based on the monitoring data, and is distributed to the booster assembly using a step-by-step full-load boosting method to determine its rotational speed. Here, step-by-step full-load boosting means that the concrete is boosted step-by-step through the booster assembly. When the booster assembly at one stage reaches full load, the next stage continues to boost the concrete until the required booster value is reached. The rotational speed of the booster assembly on the shaftless pump multi-stage booster device needs to be calculated and compensated.

[0009] The method for calculating the rotational speed of the booster component on the shaftless pump-driven multi-stage booster device includes:

[0010] Let the length of the shaftless pump-driven multi-stage booster device be ΔL, and it consists of j0 booster components, j=1, 2, 3, …j…j0, then the length of each booster component is δ=ΔL / j0;

[0011] Let the inner diameter of the booster assembly be d, the self-weight of the pumped concrete be γ, and g be the acceleration due to gravity.

[0012] The shaftless pump pushes a multi-stage booster device to pump concrete vertically upwards. The pressure loss Δp experienced by the concrete during pumping is determined by Δp Vc and Δp γ It consists of two parts, where Δp Vc It is the friction loss experienced by concrete as it flows within the pump pipe, including the resistance generated by the viscosity of the concrete and the frictional resistance generated by the flow of the concrete; Δp γ It is the pressure generated by the weight of concrete during vertical pumping, that is, the total pressure loss Δp of concrete pumped vertically upward in each stage of the booster assembly. FI for:

[0013] Δp FI =Δp Vc +Δp γ Formula 1;

[0014] If the pumped concrete is ordinary concrete, the pressure loss along the flow rate Δp per meter during vertical upward pumping is... Vcm for:

[0015]

[0016] In the formula: ΔpVcm is the pressure loss per meter of concrete flowing in the vertical conveying pipe; d is the diameter of the concrete conveying pipe; K1 is the adhesion coefficient; K2 is the velocity coefficient; S1 is the concrete slump; t2 / t1 is the ratio of the switching time of the concrete pump distribution valve to the time of the piston pushing the concrete. When the equipment performance is unknown, it can be taken as 0.30; v m is the average flow velocity of the concrete mixture in the conveying pipe; α is the ratio of the radial pressure to the axial pressure, and for ordinary concrete, it is taken as 0.90; β is the conversion coefficient. When d / 2 is 100, 125, and 150 mm respectively, β is taken as 3, 4, and 5;

[0017] The pressure Δp generated by the gravity of each meter of concrete during vertical pumping of concrete γm is:

[0018] Δp γm = γ Equation 3;

[0019] Substituting Equation 2 and Equation 3 into Equation 1, the total pressure loss Δp of the concrete vertically pumped upward in each stage of the pressurization component can be obtained FI is:

[0020]

[0021] The pressure p generated by the j-th stage of the pressurization component on the pumped concrete w is:

[0022] p w = γv 2 / 2g = γ[v1 / (πnR / 30v0)] 2 / 2g Equation 5;

[0023] In the formula: v is the flow velocity provided by the j-th stage of the pressurization component for the concrete, v = v1 / (ωR / v0) = v1 / (πnR / 30v0); ω is the angular velocity of each stage of the pressurization component; n is the rotational speed; R is the blade radius; v0 is the tip speed; v1 is the root speed;

[0024] Assume that the output concrete pressure required by the shaftless pump pushing multi-stage pressurization device is p eh , and the axial pressure of the concrete entering the shaftless pump pushing multi-stage pressurization device is p s . If there are m stages of pressurization components reaching the rated pressure p we , m < j0, then the rotational speed of the (m + 1)-th stage of the pressurization component is:

[0025]

[0026] Let Equation 5 be equal to Equation 6, and the rotational speed n of the (m + 1)-th stage of the pressurization component can be obtained when restoring the required output pressure p eh is:

[0027]

[0028] The radial pressure p of the concrete at the inlet of the booster assembly is monitored by a pressure sensor. d For ordinary concrete, the radial pressure p of the concrete in the conveying pipeline d With axial pressure p s If the ratio α = 0.90, then the axial pressure p of the concrete entering the multi-stage booster device of the shaftless pump is... s =p d / α;

[0029] The axial pressure p of the concrete at the inlet of each stage of the booster unit is monitored by pressure sensors inside the multi-stage booster device propelled by the shaftless pump. s1 p s2 p s3 …p sj0 and the axial pressure p of the concrete at the outlet of the last stage booster assembly se ;

[0030] The concrete flow velocity (v) at the inlet of each stage of the multi-stage booster device is monitored by a velocity sensor inside the shaftless pump. m1 v m2 v m3 …v mj0 and the concrete flow velocity v at the outlet of the last stage pressurization component e ;

[0031] If the radius from the center of rotation to the blade tip is r0, and the radius from the center of rotation to the blade root is r1 = d / 2, then the rotational speed at the blade tip is v0 = πnr0 / 30, and the rotational speed at the blade root is v1 = πnr1 / 30. Substituting v0, v1, and v... m(m+1) Substituting into Equation 7, we can obtain the rotational speed n of the (m+1)th stage booster component to restore the required output pressure. m+1 for:

[0032]

[0033] The rotational speed n of the first m-stage supercharger assembly j They are respectively:

[0034]

[0035] In the formula: j≤m;

[0036] If the pumped concrete is high-strength concrete, the pressure loss along the flow rate Δp per meter during vertical upward pumping is... Vum for:

[0037] Δp Vcm =Δp Vum =0.015 + 0.057η (Equation 10);

[0038] In the formula: ΔpVum η is the pressure loss per meter of the high-strength concrete vertical conveying pipe; η is the plastic viscosity.

[0039] Combining equations 3, 4, 5, 6, and 10, for high-strength concrete, to restore the required output pressure, the rotational speed n of the (m+1)th stage pressurization component... m+1 for:

[0040]

[0041] The rotational speed n of the first m-stage supercharger assembly j They are respectively:

[0042]

[0043] The method for compensating for the rotational speed of the booster components on the shaftless pump-driven multi-stage booster device includes:

[0044] The pressure sensor at the inlet of the j-th stage booster assembly monitors the concrete pressure at the outlet of the j-1-th stage booster assembly, while the pressure sensor at the outlet of the last stage booster assembly monitors the axial concrete pressure p at the outlet of the last stage booster assembly. se ;

[0045] The velocity sensor at the inlet of the j-th stage booster assembly monitors the concrete flow velocity at the outlet of the j-1-th stage booster assembly, while the velocity sensor at the outlet of the last stage booster assembly monitors the concrete flow velocity v at the outlet of the last stage booster assembly. e ;

[0046] The axial pressure of the concrete monitored by the pressure sensor at the outlet of the (m+1)th stage booster assembly is used to adjust the rotational speed n of the (m+1)th stage booster assembly.

[0047] If p eh -p s(m+2) >0, the rotational speed n of the (m+1)th stage booster component e(m+1) Increase Δn, if p eh -p s(m+2) <0, the rotational speed n of the (m+1)th stage booster component e(m+1) Reducing Δn, for ordinary concrete, the final rotational speed n of the (m+1)th stage booster component during actual concrete pumping after compensation is... e(m+1) for:

[0048]

[0049] For high-strength concrete, the final rotational speed n of the (m+1)th stage booster component during actual concrete pumping after compensation is... e(m+1) for:

[0050]

[0051] The buffer assembly includes an annular buffer seat, an annular buffer cavity disposed within the annular buffer seat, a plurality of buffer springs arranged along the circumferential direction of the annular buffer cavity, and an annular steel support connected at one end to the pressurization assembly. The other end of the annular steel support extends into the annular buffer cavity and is connected to an annular steel pad. The annular steel pad contacts or connects to the buffer springs corresponding to those in the annular buffer cavity.

[0052] The annular buffer seat is composed of an inner cylindrical buffer steel plate, an outer cylindrical buffer steel plate, an annular buffer base plate, and an annular steel clamping plate. The annular steel clamping plate has an annular groove that communicates with the annular buffer cavity. The annular groove has a smaller ring width than the annular buffer cavity, and the annular steel pad has a larger ring width than the annular groove.

[0053] The rotor assembly includes a steel cylinder, a rotating gear ring, and an annular slider. The rotating gear ring is located at both ends of the steel cylinder, and the annular slider is located at both ends of the steel cylinder and cooperates with the annular groove of the supporting end cover. The blades are arranged circumferentially along the inner wall of the steel cylinder.

[0054] The power assembly includes several motor groups arranged circumferentially along the cylindrical protective cover. Each motor group consists of two motors arranged opposite each other. The two motors are respectively mounted on both sides of the motor base. A power gear is connected to the motor shaft of the motor. The power gear extends outside the cylindrical protective cover and meshes with the rotating gear ring.

[0055] The pressure sensors are arranged along the circumference of the steel cylinder, and each of the speed sensors is located between two adjacent pressure sensors.

[0056] The advantages of this invention are:

[0057] (1) Reduce the initial pumping pressure of high-rise buildings to ensure construction safety, while reducing the pressure requirements of pumping equipment and the strength requirements of delivery pipes to reduce equipment cost investment;

[0058] (2) This shaftless pump pusher multi-stage booster device can increase the pumping height of the pumped concrete;

[0059] (3) The internal space of the pipeline of the shaftless pump-driven multi-stage booster device is large, which is beneficial to the pumping of concrete.

[0060] (4) Monitor the concrete pumping pressure at all times, and adjust the number of pressurizing components to be turned on in real time when pressurizing, and pressurize at full load step by step for high efficiency and energy saving.

[0061] (5) Monitor the outlet pressure of the shaftless pump-driven multi-stage booster device at all times, and adjust the blade speed in a cyclical manner to ensure that the pressure meets the requirements and is stable.

[0062] (6) Adding a shaftless pump to the hose can ensure that the pouring pressure meets the requirements and make the poured concrete more compact. Attached Figure Description

[0063] Figure 1 This is a schematic diagram of the present invention;

[0064] Figure 2 This is a schematic diagram of the shaftless pump-driven multi-stage booster device of the present invention;

[0065] Figure 3 This is a schematic cross-sectional view of the shaftless pump-driven multi-stage booster device of the present invention;

[0066] Figure 4 This is a circuit diagram of the control system of the present invention;

[0067] Figure 5 for Figure 3 Cross-sectional view of AA in the middle;

[0068] Figure 6 for Figure 3 Cross-sectional view of BB in the middle;

[0069] Figure 7 for Figure 3 Cross-sectional view of CC in the middle;

[0070] Figure 8 for Figure 3 Cross-sectional view of DD in the middle;

[0071] Figure 9 for Figure 3 Cross-sectional view of the EE;

[0072] Figure 10 for Figure 3 Cross-sectional view of FF in the middle;

[0073] Figure 11 for Figure 3 Cross-sectional view of GG in China;

[0074] like Figures 1-11 As shown in the figure, the labels represent:

[0075] a. Pumping system; b. Shaftless pump-driven multi-stage booster device; b1. First-stage booster assembly; b2. Second-stage booster assembly; b3. Third-stage booster assembly; c. High-rise building;

[0076] 1. Pressurization component, 2. Buffer component, 3. Connecting pipe, 4. Conveying pipe, 5. Concrete pumping direction, 6. Rotation direction, 7. Concrete feeder, 8. Grouting hose;

[0077] 11. Rotor assembly, 12. Power assembly, 13. Cylindrical protective cover, 14. Support end cover, 15. Control system, 111. Steel cylinder, 112. Rotating gear ring, 113. Annular slider, 114. Blade, 121. Motor, 122. Motor shaft, 123. Motor base, 124. Power gear, 131. Inner side plate of cylindrical protective cover, 132. Outer side plate of cylindrical protective cover, 133. Annular protective cover cover plate, 134. Rectangular hole, 141. Annular groove, 151. Pressure sensor one, 152. Pressure sensor two, 153. Pressure sensor three, 154. Pressure sensor four, 155. Speed ​​sensor one, 156. Speed ​​sensor two, 157. Speed ​​sensor three, 158. Speed ​​sensor four, 159. Processor;

[0078] 21. Annular buffer seat, 22. Annular steel support, 23. Annular steel pad, 24. Annular buffer cavity, 25. Buffer spring, 26. Rubber washer, 211. Inner steel plate of cylindrical buffer, 212. Outer steel plate of cylindrical buffer, 213. Annular buffer base plate, 214. Annular steel clamping plate;

[0079] 31. Connecting cylinder; 32. Thread;

[0080] 71. Storage silo, 72. Concrete, 73. Base. Detailed Implementation

[0081] The features and other related features of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate understanding by those skilled in the art:

[0082] Example: Figure 1-11 As shown, this embodiment relates to a method for pumping concrete in ultra-high-rise buildings using a shaftless pump with a push belt compensation system, achieving step-by-step full-load pumping. The method utilizes pumping system a to pump concrete into the high-rise building c. The main components of this method include:

[0083] The concrete feeder 7 is placed on the ground, and the conveying pipe 4 and the grouting hose 8 are connected to the concrete feeder 7 in sequence so that the grouting hose 8 extends to the corresponding position of the high-rise building c.

[0084] like Figure 1-2As shown, the inlet of the conveying pipe 4 is connected to the concrete feeder 7 on the ground, and the outlet of the conveying pipe 4 extends upward and is connected to the grouting hose 8. Multiple shaftless pump-driven multi-stage booster devices b are provided. The shaftless pump-driven multi-stage booster devices b are arranged on the conveying pipe 4. Part of the shaftless pump-driven multi-stage booster devices b are arranged on the vertical section of the conveying pipe 4, and the other part is arranged on the horizontal section of the conveying pipe 4. The grouting hose 8 is connected to the vertical section of the conveying pipe 4, and the concrete feeder 7 is connected to the horizontal section of the conveying pipe 4 through the shaftless pump-driven multi-stage booster devices b. Specifically, the concrete feeder 7 includes a storage bin 71 and a base 73. The storage bin 71 is installed on the base 74. The storage bin 71 stores concrete 72. The concrete feeder 77 pumps the concrete 72. The concrete 72 is pumped through the conveying pipe 4 and the grouting hose 8 to the corresponding position of the high-rise building c.

[0085] like Figure 1-2 As shown, the shaftless pump-driven multi-stage booster device b mainly includes a three-stage booster assembly 1, two buffer assemblies 2, and two connecting pipes 3. The booster assembly 1, buffer assemblies 2, and connecting pipes 3 are coaxially arranged. The three-stage booster assembly 1 consists of a first-stage booster assembly a1, a second-stage booster assembly a2, and a third-stage booster assembly a3. The three-stage booster assemblies 1 are connected sequentially. The first-stage booster assembly a1 and the third-stage booster assembly a3 are respectively connected to the two buffer assemblies 2. The two buffer assemblies 2 are respectively connected to the two connecting pipes 3. The connecting pipes 3 are threaded to the conveying pipes 4 (grouting hose 8 and concrete feeder 7). Specifically, the connecting pipes 3 are connecting cylinders 31 with threads 32. One end of the connecting cylinder 31 is fixedly connected to the buffer assembly 2, and the other end is connected to the conveying pipes 4 (grouting hose 8 and concrete feeder 7) through the threads 32 on it.

[0086] like Figure 1-8As shown, the booster assembly 1 includes a rotor assembly 11, a power assembly 12, a cylindrical protective cover 13, a support end cover 14, and a control system 15. The power assembly 12 is installed inside the cylindrical protective cover 13. The support end cover 14 is located at both ends of the rotor assembly 11 and the power assembly 12. Specifically, the upper support end cover 14 of the first-stage booster assembly a1 is connected to the lower support end cover 14 of the second-stage booster assembly a2. The upper support end cover 14 of the second-stage booster assembly a2 is connected to the lower support end cover 14 of the third-stage booster assembly a3. The power assembly 12 is located outside the rotor assembly 11 and can drive the rotor assembly 11 to rotate. The rotor assembly 11 includes a steel cylinder 111, a rotating gear ring 112, an annular slider 113, and blades 114. The rotating gear ring 112 is located at both ends of the steel cylinder 111, and the annular slider 113 is also located at both ends of the steel cylinder 111. An annular groove 141 is provided on the support end cover 14, which cooperates with the annular slider 113, allowing the annular slider 113 to rotate within the annular groove 141. One set of blades 114 is arranged circumferentially along the inner wall of the steel cylinder 111. The blades 114 are fan-shaped and inclined, and are located in the middle of the inner wall of the steel cylinder 111. The concrete pumping direction 5 is from bottom to top (e.g., ...). Figure 1 and Figure 3 As shown, blade 114 can withstand the impact of pumped concrete and guide the flow of pumped concrete.

[0087] The power assembly 12 includes several motor units located inside the cylindrical protective cover 13 and arranged circumferentially along the cylindrical protective cover 13. Each motor unit consists of two opposing motors 121, which are respectively mounted on both sides of the motor base 123. A drive gear 124 is connected to the motor shaft 122 of the motor 121. The drive gear 124 extends through a rectangular hole 134 on the cylindrical protective cover 13 to the outside of the cylindrical protective cover 13 and meshes with a rotating gear ring 112. The motor 121 drives the drive gear 124 on the motor shaft 122 to rotate, which in turn drives the rotating gear ring 112 to rotate, causing the annular slider 113 to rotate within the annular groove 141, thereby causing the blades 114 on the steel cylinder 111 to rotate (see section 6 for the rotation direction of the shaftless pump pushing the multi-stage booster device). Figure 1 and Figure 3 As shown, the high-speed rotating blades 114 provide pressure to the concrete to achieve the purpose of pressurization, ensuring that the concrete pumping pressure meets the requirements and guaranteeing the construction quality of the pouring. In addition, the cylindrical protective cover 13 includes an inner cylindrical protective cover plate 131, an outer cylindrical protective cover plate 132, and an annular protective cover cover plate 133, which is connected to the support end cover 14.

[0088] like Figure 2 , 4As shown in Figure 7, the control system 15 includes a pressure sensor, a speed sensor, and a processor 155. The pressure sensor and speed sensor are electrically connected to the processor 155. The pressure sensor and speed sensor measure the pressure and speed of the concrete, respectively, and transmit the data to the processor 155 for analysis and processing. The pressure sensor and speed sensor are both arranged circumferentially along the steel cylinder 111, and they are staggered, that is, each speed sensor is located between two adjacent pressure sensors, and each pressure sensor is located between two adjacent speed sensors. In this embodiment, the pressure sensors include pressure sensor 151, pressure sensor 152, pressure sensor 153, and pressure sensor 154, and the speed sensors include speed sensor 155, speed sensor 156, speed sensor 157, and speed sensor 158. Pressure sensor 151 and speed sensor 155 are both located on the side of the lower rotating gear ring 112 of the first-stage pressurization assembly a1, pressure sensor 152 and speed sensor 156 are both located on the side of the lower rotating gear ring 112 of the second-stage pressurization assembly a2, pressure sensor 153 and speed sensor 157 are both located on the side of the lower rotating gear ring 112 of the third-stage pressurization assembly a3, and pressure sensor 154 and speed sensor 158 are both located on the side of the upper rotating gear ring 112 of the third-stage pressurization assembly a3, which can improve the accuracy of the measurement results.

[0089] like Figure 1-2As shown in Figures 9-11, the buffer assembly 2 includes an annular buffer seat 21, an annular steel support 22, an annular steel pad 23, an annular buffer cavity 24, buffer springs 25, and rubber washers 26. The annular buffer cavity 24 is located inside the annular buffer seat 21. Multiple buffer springs 25 are arranged along the circumferential direction of the annular buffer cavity 24 to provide buffering. In this embodiment, the annular buffer seat 21 is composed of a cylindrical inner buffer steel plate 211, a cylindrical outer buffer steel plate 212, an annular buffer base plate 213, and an annular steel clamping plate 214. The annular steel clamping plate 214 has an annular groove that communicates with the annular buffer cavity 24. The size of the annular groove is similar to the size of the annular steel support 22. The annular groove guides the annular steel support 22. One end of the annular steel support 22 is connected to the support end cap 14 (of the first-stage pressurization component a1 and the third-stage pressurization component a3), and the other end extends through the annular groove into the annular buffer cavity 24 and is connected to an annular steel pad 23. The annular steel pad 23 contacts or connects to the buffer spring 25 in the corresponding annular buffer cavity 24. The size of the annular buffer cavity 24 is adapted to the size of the annular steel pad 23, and the annular buffer cavity 24 guides the annular steel pad 23. The annular steel pad 23 has a ring width greater than the annular groove ring width, which can prevent the annular steel support 22 from moving outside the annular buffer cavity 22 of the buffer component 2. A rubber gasket 26 is provided between the support end cap 14 and the annular buffer seat 21, and the rubber gasket 26 is sleeved on the outside of the annular steel support 22. This not only prevents the support end cap 14 from colliding with the annular buffer seat 21, but also guides the annular steel support 22.

[0090] The power components, pressure sensors, and speed sensors of the booster components on the shaftless pump-driven multi-stage booster device are activated. The rotational speed of the booster components is adjusted step-by-step using monitoring data from the pressure and speed sensors, and concrete is pumped to the corresponding location on the high-rise building via a concrete mixer. The booster value is determined by the monitoring data and distributed to the booster components on the shaftless pump-driven multi-stage booster device using a step-by-step full-load boosting method to determine the rotational speed of the booster components. This step-by-step full-load boosting means that the booster components on the shaftless pump-driven multi-stage booster device gradually increase the pressure of the concrete. When one booster component reaches full load, the next booster component continues to increase the pressure until the desired booster value is reached. That is, once the desired booster value is reached, the subsequent booster components standby and do not rotate, saving energy. In this embodiment, the booster assembly on the shaftless pump-driven multi-stage booster device has three stages. When the required booster value can be achieved by activating the first-stage booster assembly, the first-stage booster assembly is activated, while the second-stage and third-stage booster assemblies are not activated. When the required booster value can be achieved by activating the two-stage booster assemblies, the first-stage and second-stage booster assemblies are activated, while the third-stage booster assembly is not activated. At this time, the first-stage booster assembly is in a fully loaded state, and the second-stage booster assembly is either fully loaded or not fully loaded. When the required booster value can be achieved by activating the three-stage booster assembly, the first-stage, second-stage, and third-stage booster assemblies are activated. At this time, the first-stage and second-stage booster assemblies are in a fully loaded state, and the third-stage booster assembly is either fully loaded or not fully loaded.

[0091] Specifically, it is necessary to calculate and compensate for the rotational speed of the booster components in the multi-stage booster device driven by the shaftless pump. The calculation method for the rotational speed of the booster components in the multi-stage booster device driven by the shaftless pump includes:

[0092] Let the length of the shaftless pump-driven multi-stage booster device be ΔL, and it consists of j0 booster components, j=1, 2, 3, …j…j0, then the length of each booster component is δ=ΔL / j0;

[0093] Let the inner diameter of the booster assembly be d (in meters), and the self-weight of the pumped concrete be γ (in N / m³). 3 Where g is the acceleration due to gravity, g = 9.8 m / s² 2 ;

[0094] The shaftless pump pushes a multi-stage booster device to pump concrete vertically upwards. The pressure loss Δp experienced by the concrete during pumping is determined by Δp Vc and Δp γ It consists of two parts, where Δp VcIt is the friction loss experienced by concrete as it flows within the pump pipe, including the resistance generated by the viscosity of the concrete and the frictional resistance generated by the flow of the concrete; Δp γ It is the pressure generated by the weight of concrete during vertical pumping, that is, the total pressure loss Δp of concrete pumped vertically upward in each stage of the booster assembly. FI for:

[0095] Δp FI =Δp Vc +Δp γ Formula 1;

[0096] If the pumped concrete is ordinary concrete, the pressure loss along the flow rate Δp per meter during vertical upward pumping is... Vcm for:

[0097]

[0098] In the formula: Δp Vcm d is the pressure loss per meter of concrete flowing in the vertical delivery pipe, measured in Pa / m; d is the diameter of the concrete delivery pipe, measured in meters; K1 is the viscosity coefficient, measured in Pa; K2 is the velocity coefficient, measured in Pa·s / m; S1 is the concrete slump, measured in mm; t2 / t1 is the ratio of the switching time of the concrete pump distribution valve to the time of the piston pushing the concrete, which can be taken as 0.30 when the equipment performance is unknown; v m α is the average flow velocity of the concrete mixture in the conveying pipe, in m / s; α is the ratio of radial pressure to axial pressure, which is 0.90 for ordinary concrete; β is a conversion factor, which is 3, 4, and 5 when d / 2 is 100, 125, and 150 mm respectively.

[0099] The pressure Δp generated per meter of concrete by its weight during vertical pumping γm (Unit: Pa / m) is:

[0100] Δp γm =γ Equation 3;

[0101] Substituting Equations 2 and 3 into Equation 1, we can obtain the total pressure loss Δp of the concrete pumped vertically upward in each stage of the pressurization assembly. FI for:

[0102]

[0103] The pressure p generated by the j-th stage pressurization component on the pumped concrete w (Unit: Pa / m) is:

[0104] p w =γv 2 / 2g=γ[v1 / (πnR / 30v0)] 2 / 2g Formula 5;

[0105] Where: v is the flow velocity provided by the j - th stage boosting component for the concrete, with the unit of m / s, and \(v = v_1 / (\omega R / v_0)=v_1 / (\pi nR / 30v_0)\); \(\omega\) is the angular velocity of each stage boosting component, with the unit of rad / s; n is the rotational speed, with the unit of r / min; R is the blade radius, with the unit of m; \(v_0\) is the tip speed, with the unit of m / s; \(v_1\) is the root speed, with the unit of m / s.

[0106] Let the required output concrete pressure of the shaftless pump - jet multi - stage boosting device be p eh , and the axial pressure of the concrete entering the shaftless pump - jet multi - stage boosting device be \(p_0\) s . If m stages of boosting components reach the rated pressure p we , and \(m\lt j_0\), then the rotational speed of the \((m + 1)\) - th stage boosting component is:

[0107]

[0108] Let Equation 5 be equal to Equation 6, and it can be obtained that when restoring the required output pressure p eh , the rotational speed n of the \((m + 1)\) - th stage boosting component is:

[0109]

[0110] Monitor the radial pressure \(p_r\) of the concrete at the inlet of the boosting component through a pressure sensor d . For ordinary concrete, the ratio \(\alpha\) of the radial pressure \(p_r\) of the concrete in the conveying pipeline to the axial pressure \(p_a\) d is 0.90, then the axial pressure \(p_a\) of the concrete entering the shaftless pump - jet multi - stage boosting device s \(=p_r / \alpha\); s \(=p_0\) d / \(\alpha\);

[0111] Monitor the axial pressure \(p_{a1}\), \(p_{a2}\), \(p_{a3}\), \(\cdots\), \(p_{am}\) of the concrete at the inlet of each stage of the boosting component and the axial pressure \(p_{ae}\) of the concrete at the outlet of the last stage of the boosting component through the pressure sensors in the shaftless pump - jet multi - stage boosting device s1 , \(p_{a2}\) s2 , \(p_{a3}\) s3 \(\cdots\), \(p_{am}\) sj0 and; se

[0112] Monitor the flow velocity \(v_1\), \(v_2\), \(v_3\), \(\cdots\), \(v_m\) of the concrete at the inlet of each stage of the boosting component and the flow velocity \(v_e\) of the concrete at the outlet of the last stage of the boosting component through the velocity sensors in the shaftless pump - jet multi - stage boosting device m1 , \(v_2\) m2 , \(v_3\) m3 \(\cdots\), \(v_m\) mj0 and; e

[0113] If the radius from the center of rotation to the blade tip is r0, and the radius from the center of rotation to the blade root is r1 = d / 2, then the rotational speed at the blade tip is v0 = πnr0 / 30, and the rotational speed at the blade root is v1 = πnr1 / 30. Substituting v0, v1, and v... m(m+1) Substituting into Equation 7, we can obtain the rotational speed n of the (m+1)th stage booster component to restore the required output pressure. m+1 for:

[0114]

[0115] The rotational speed n of the first m-stage supercharger assembly j (j≤m) are respectively:

[0116]

[0117] If the pumped concrete is high-strength concrete, the pressure loss along the flow rate Δp per meter during vertical upward pumping is... Vum for:

[0118] Δp Vcm =Δp Vum =0.015 + 0.057η (Equation 10);

[0119] In the formula: Δp Vum η is the pressure loss per meter of the high-strength concrete vertical conveying pipe; η is the plastic viscosity.

[0120] Combining equations 3, 4, 5, 6, and 10, for high-strength concrete, to restore the required output pressure, the rotational speed n of the (m+1)th stage pressurization component... m+1 for:

[0121]

[0122] The rotational speed n of the first m-stage supercharger assembly j (j≤m) are respectively:

[0123]

[0124] Methods for compensating for the rotational speed of the booster components in a shaftless pump-driven multi-stage booster unit include:

[0125] The pressure sensor at the inlet of the j-th stage booster assembly monitors the concrete pressure at the outlet of the j-1-th stage booster assembly, while the pressure sensor at the outlet of the last stage booster assembly monitors the axial concrete pressure p at the outlet of the last stage booster assembly. se ;

[0126] The velocity sensor at the inlet of the j-th stage booster assembly monitors the concrete flow velocity at the outlet of the j-1-th stage booster assembly, while the velocity sensor at the outlet of the last stage booster assembly monitors the concrete flow velocity v at the outlet of the last stage booster assembly. e ;

[0127] The axial pressure of the concrete monitored by the pressure sensor at the outlet of the (m+1)th stage booster assembly is used to adjust the rotational speed n of the (m+1)th stage booster assembly.

[0128] If p eh -p s(m+2) >0, the rotational speed n of the (m+1)th stage booster component e(m+1) Increase Δn, if p eh -p s(m+2) <0, the rotational speed n of the (m+1)th stage booster component e(m+1) Reducing Δn, for ordinary concrete, the final rotational speed n of the (m+1)th stage booster component during actual concrete pumping after compensation is... e(m+1) for:

[0129]

[0130] For high-strength concrete, the final rotational speed n of the (m+1)th stage booster component during actual concrete pumping after compensation is... e(m+1) for:

[0131]

[0132] The beneficial technical effects of this embodiment are as follows:

[0133] (1) Reduce the initial pumping pressure of high-rise buildings to ensure construction safety, while reducing the pressure requirements of pumping equipment and the strength requirements of delivery pipes to reduce equipment cost investment;

[0134] (2) This shaftless pump pusher multi-stage booster device can increase the pumping height of the pumped concrete;

[0135] (3) The internal space of the pipeline of the shaftless pump-driven multi-stage booster device is large, which is beneficial to the pumping of concrete.

[0136] (4) Monitor the concrete pumping pressure at all times, and adjust the number of pressurizing components to be turned on in real time when pressurizing, and pressurize at full load step by step for high efficiency and energy saving.

[0137] (5) Monitor the outlet pressure of the shaftless pump-driven multi-stage booster device at all times, and adjust the blade speed in a cyclical manner to ensure that the pressure meets the requirements and is stable.

[0138] (6) Adding a shaftless pump to the hose can ensure that the pouring pressure meets the requirements and make the poured concrete more compact.

[0139] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A method for shaftless pumping of concrete in ultra-high-rise buildings with compensated, staged full-load pumping, characterized in that... The pumping method includes: A concrete feeder is placed on the ground, and a delivery pipe and a grouting hose are connected to the feeder in sequence so that the grouting hose extends to the corresponding position of the high-rise building. A shaftless pump-driven multi-stage pressurization device is installed on the delivery pipe. The shaftless pump-driven multi-stage pressurization device includes a multi-stage pressurization assembly, two buffer assemblies, and two connecting pipes. The pressurization assemblies are connected in sequence. The first-stage pressurization assembly and the last-stage pressurization assembly are respectively connected to the two buffer assemblies, and the two buffer assemblies are respectively connected to the two connecting pipes. The pressurization assembly includes a cylindrical protective cover, a rotor assembly, a power assembly installed inside the cylindrical protective cover, and support end caps at both ends of the rotor assembly and the power assembly. The power assembly drives the rotor assembly to rotate. The rotor assembly is equipped with blades, a pressure sensor, and a speed sensor. The power component, pressure sensor, and speed sensor of the booster assembly on the shaftless pump multi-stage booster device are activated. The rotational speed of the booster assembly is adjusted step-by-step using monitoring data from the pressure and speed sensors, and the concrete is pumped to the corresponding location on the high-rise building via the concrete mixer. The booster value is determined based on the monitoring data, and is distributed to the booster assembly using a step-by-step full-load boosting method to determine its rotational speed. Here, step-by-step full-load boosting means that the concrete is boosted step-by-step through the booster assembly. When the booster assembly at one stage reaches full load, the next stage continues to boost the concrete until the required booster value is reached. The rotational speed of the booster assembly on the shaftless pump multi-stage booster device needs to be calculated and compensated. The method for calculating the rotational speed of the booster component on the shaftless pump-driven multi-stage booster device includes: Assume the length of the shaftless pump pushing the multi-stage booster device is Δ. L There are a total of j Composed of a 0-stage booster assembly, j =1, 2, 3, ... j … j If 0, then the length of each booster assembly is δ = Δ L / j 0; Assume the inner diameter of the concrete delivery pipe is d The self-weight of the pumped concrete is γ , g It is the acceleration due to gravity; The shaftless pump pushes a multi-stage booster unit to pump concrete vertically upwards. The total pressure loss Δp in each booster unit during the vertical upward pumping of concrete is... FI Due to friction loss Δp Vc and gravity loss Δp γ It consists of two parts, namely: D p FI = D p Vc +D p γ formula 1; If the pumped concrete is ordinary concrete, the pressure loss along the line per meter of vertical upward pumping is Δ. p Vcm for: Formula 2; In the formula: Δ p Vcm It is the pressure loss per meter generated when ordinary concrete flows in a vertical conveying pipe; d It is the inner diameter of the concrete delivery pipe; K 1 is the coefficient of adhesion; K 2 is the velocity coefficient; S 1 represents the concrete slump; t 2 / t 1 is the ratio of the switching time of the concrete pump distribution valve to the time of the piston pushing concrete. When the equipment performance is unknown, it can be taken as 0.

30. v m It is the average flow velocity of the concrete mixture within the delivery pipe; α It is the ratio of radial pressure to axial pressure, which is taken as 0.90 for ordinary concrete; β These are conversion factors. d When / 2 is 100, 125, and 150 mm respectively, β Choose 3, 4, or 5; The pressure Δ per meter of concrete weight generated during vertical concrete pumping p γm for: Δ p γm = γ Formula 3; Substituting Equations 2 and 3 into Equation 1, we can obtain the total pressure loss Δ of the concrete pumped vertically upward in each stage of the pressurization assembly. p FI for: Equation 4; In the formula, δ is the length of each stage of the booster assembly; No. j The pressure generated by the booster unit on the pumped concrete p w for: Formula 5; In the formula: v It is the first j The flow rate provided by the booster unit to the concrete. ; ω It is the angular velocity of each stage of the booster assembly; n It is the rotational speed; R It is the blade radius; v 0 is the tip velocity of the blade; v 1 represents the velocity at the leaf root; Assuming the shaftless pump pushes a multi-stage booster device, the required output concrete pressure is... p eh The axial pressure of the concrete entering the multi-stage booster pump is... p s If there is m The booster unit reaches the rated pressure p we , m < j If 0, then the rotational speed of the (m+1)th stage supercharger assembly is: Formula 6; Equation 5 equals Equation 6, so we can obtain the required output pressure for restoration. p eh At that time, the first m +1 stage turbocharger speed n m+1 for: Formula 7; The radial pressure of the concrete at the inlet of the booster assembly is monitored using a pressure sensor. p d For ordinary concrete, the radial pressure of concrete in the conveying pipeline p d With axial pressure p s ratio α = 0.90, then the axial pressure of the concrete entering the multi-stage booster device of the shaftless pump is 0.

90. p s = p d / α ; The axial pressure of the concrete at the inlet of each stage of the booster unit is monitored by pressure sensors inside the shaftless pump-driven multi-stage booster device. p s1 , p s2 , p s3 … p sj0 and the concrete axial pressure at the outlet of the final stage booster assembly p se ; The concrete flow velocity at the inlet of each stage of the booster unit is monitored by a velocity sensor inside the shaftless pump. v m1 , v m2 , v m3 … v mj0 and the concrete flow rate at the outlet of the final stage pressurization component v e ; If the radius from the center of rotation to the blade tip is r 0, the radius from the center of rotation to the leaf root is r 1 = d / 2, then the blade tip rotation speed is v 0=π nr 0 / 30, blade root rotation speed v 1 = π nr 1 / 30, will v 0、 v 1 and v m(m+1) Substituting into equation 7, we can obtain the required output pressure for recovery. m +1 stage turbocharger speed n m+1 for: Formula 8; forward m Speed ​​of the supercharger assembly n j They are respectively: Equation 9; In the formula: j ≤ m ; If the pumped concrete is high-strength concrete, the pressure loss along the flow rate Δ per meter during vertical upward pumping is... p Vum for: D p Vcm =D p Vum =0.015+0.057 η formula 10; In the formula: Δ p Vum This refers to the pressure loss per meter of a high-strength concrete vertical conveying pipe. η It is a plastic viscosity; Combining equations 3, 4, 5, 6, and 10, for high-strength concrete, in order to restore the required output pressure, the first... m +1 stage turbocharger speed n m+1 for: Formula 11; forward m Speed ​​of the supercharger assembly n j They are respectively: Equation 12.

2. The method for shaftless pumping of ultra-high-rise concrete with compensated step-by-step full-load pumping as described in claim 1, characterized in that... The method for compensating for the rotational speed of the booster components on the shaftless pump-driven multi-stage booster device includes: No. j The pressure sensor at the inlet of the booster unit also monitors the first... j The concrete pressure at the outlet of the -1 stage booster assembly is monitored by a pressure sensor at the outlet of the final stage booster assembly, which also monitors the axial pressure of the concrete at the outlet of the final stage booster assembly. p se ; No. j The speed sensor at the inlet of the booster unit also monitors the first... j The concrete flow velocity at the outlet of the -1 stage booster assembly is monitored by a velocity sensor at the outlet of the final stage booster assembly. v e ; No. m The axial pressure of the concrete monitored by the pressure sensor at the outlet of the +1 stage booster assembly is used to adjust the... m +1 stage turbocharger speed n ; like p eh - p s(m+2) >0, No. m +1 stage turbocharger speed n e(m+1) Increase Δ n ,like p eh - p s(m+2) <0, no. m +1 stage turbocharger speed n e(m+1) Reduce Δ n For ordinary concrete, after speed compensation, the final pumping speed of the concrete will be... m +1 stage turbocharger speed n e(m+1) for: Equation 13; For high-strength concrete, after speed compensation, the final pumping speed of the concrete is... m +1 stage turbocharger speed n e(m+1) for: Equation 14.

3. The method for shaftless pumping of ultra-high-rise concrete with compensated step-by-step full-load pumping as described in claim 1, characterized in that... The buffer assembly includes an annular buffer seat, an annular buffer cavity disposed within the annular buffer seat, a plurality of buffer springs arranged along the circumferential direction of the annular buffer cavity, and an annular steel support connected at one end to the pressurization assembly. The other end of the annular steel support extends into the annular buffer cavity and is connected to an annular steel pad. The annular steel pad contacts or connects to the buffer springs corresponding to those in the annular buffer cavity.

4. The method for shaftless pumping of ultra-high-rise concrete with compensated step-by-step full-load pumping as described in claim 3, characterized in that... The annular buffer seat is composed of an inner cylindrical buffer steel plate, an outer cylindrical buffer steel plate, an annular buffer base plate, and an annular steel clamping plate. The annular steel clamping plate has an annular groove that communicates with the annular buffer cavity. The annular groove has a smaller ring width than the annular buffer cavity, and the annular steel pad has a larger ring width than the annular groove.

5. The method for shaftless pumping of ultra-high-rise concrete with compensated step-by-step full-load pumping as described in claim 1, characterized in that... The rotor assembly includes a steel cylinder, a rotating gear ring, and an annular slider. The rotating gear ring is located at both ends of the steel cylinder, and the annular slider is located at both ends of the steel cylinder and cooperates with the annular groove of the supporting end cover. The blades are arranged circumferentially along the inner wall of the steel cylinder.

6. The method for shaftless pumping of ultra-high-rise concrete with compensated step-by-step full-load pumping as described in claim 5, characterized in that... The power assembly includes several motor groups arranged circumferentially along the cylindrical protective cover. Each motor group consists of two motors arranged opposite each other. The two motors are respectively mounted on both sides of the motor base. A power gear is connected to the motor shaft of the motor. The power gear extends outside the cylindrical protective cover and meshes with the rotating gear ring.

7. The method for shaftless pumping of ultra-high-rise concrete with compensated step-by-step full-load pumping as described in claim 6, characterized in that... The pressure sensors are arranged along the circumference of the steel cylinder, and each of the speed sensors is located between two adjacent pressure sensors.

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