CN117514821A - Super high-rise pumping concrete shaftless pump pushing step-by-step full-load pumping method - Google Patents
Super high-rise pumping concrete shaftless pump pushing step-by-step full-load pumping method Download PDFInfo
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- CN117514821A CN117514821A CN202311654528.6A CN202311654528A CN117514821A CN 117514821 A CN117514821 A CN 117514821A CN 202311654528 A CN202311654528 A CN 202311654528A CN 117514821 A CN117514821 A CN 117514821A
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- 239000004567 concrete Substances 0.000 title claims abstract description 191
- 238000005086 pumping Methods 0.000 title claims abstract description 147
- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 63
- 239000010959 steel Substances 0.000 claims description 63
- 230000001681 protective effect Effects 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 9
- 239000011372 high-strength concrete Substances 0.000 claims description 9
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 230000000712 assembly Effects 0.000 abstract description 11
- 238000000429 assembly Methods 0.000 abstract description 11
- 238000010276 construction Methods 0.000 description 12
- 230000003139 buffering effect Effects 0.000 description 5
- 238000005266 casting Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a pumping method for pumping concrete in super high-rise without shaft pump pushing step by step and full load, which comprises the following steps: arranging a concrete feeder on the ground, and sequentially connecting a conveying pipe and a grouting hose on the concrete feeder; starting a power component, a pressure sensor and a speed sensor of a pressurizing component on the shaftless pumping multistage pressurizing device, gradually adjusting the rotating speed of the pressurizing component on the shaftless pumping multistage pressurizing device by utilizing monitoring data of the pressure sensor and the speed sensor, and pumping concrete to a corresponding position of a high-rise building through a concrete feeder; and determining a supercharging value through the monitoring data, and distributing the supercharging value to a supercharging assembly on the shaftless pumping multistage supercharging device in a step-by-step full-load supercharging mode so as to determine the rotating speed of the supercharging assembly on the shaftless pumping multistage supercharging device. The invention has the advantages that: and the pumping pressure of the concrete is monitored at all times, the number of the pressurizing assemblies is adjusted and started in real time during pressurizing, and the pressurizing assemblies are fully loaded and pressurized step by step, so that the system is efficient and energy-saving.
Description
Technical Field
The invention relates to the technical field of pipeline transportation of super high-rise pumping concrete, in particular to a shaft-free pump pushing step-by-step full-load pumping method of super high-rise pumping concrete.
Background
With the development of urban construction, super high-rise buildings are increasingly increased, and the test of super high-rise building on vertical transportation of building materials is also increasingly severe. In addition to the concrete mix problem, the technical difficulties of super high-rise pumping mainly come from the conveying capacity of concrete pumping equipment and pumping pipelines. When the building height reaches 300m or even more than 500m, the pumping of concrete becomes more difficult, and in addition, the super high-rise building usually uses high-strength high-performance concrete, so that the test of pumping systems is also aggravated by the improvement of the strength of concrete materials. If the pumping system is unreasonably arranged in the construction process, the pump pipe is extremely easy to have a pipe blocking event; or when the pumping pressure does not meet the high demand, the project construction is stopped and high cost is brought, so that the performance of the selected pumping equipment, the arrangement of the pumping system and the related operation process are particularly important to whether ultra-high pressure pumping can be realized.
At present, the related construction methods of domestic ultrahigh pressure pumping are fewer, the pumping system is lack, the conventional pumping technology is imperfect, concrete pumping is uncontrollable, and the events such as insufficient pumping pressure, pipe blockage in the pumping process and the like are very easy to occur in high-rise pumping. In conventional super high-rise construction projects, super high pressure pumps and relay pumping methods are generally adopted. For example, patent number CN 115680285a, "a super high-rise concrete pumping system and construction method" provides huge pressure pumping concrete through a super high-pressure pump set. In terms of a relay pumping method and a device, the patent number CN 111622779A 'a pulse type pressure compensation long-distance concrete conveying device and a using method' is characterized in that a plurality of pneumatic booster pumps are arranged on a conveying pipeline at intervals, an air outlet pipe of each pneumatic booster pump is connected to the conveying pipeline, the pushing pressure lost by concrete in conveying is compensated, the concrete pressure in the whole conveying pipeline is kept stable, the concrete long-distance conveying patent number CN 103541550A 'a construction pumping system of super high-rise building steel pipe concrete' is realized, a high-pressure pump and a pouring hose are connected through a discharge hole, and the two concrete pumps achieve the super high-rise pumping purpose in a relay mode. Although the prior art solves the problems of insufficient pressure and relay pumping of some high-rise pumping concrete, the following problems still exist: (1) Long-distance and super-high-rise pumping, high pressure pump pressure, high performance and cost of the high-pressure pump, high performance required for pipelines adjacent to the pressure pump, increased equipment cost and low construction safety; (2) The traditional pressure pump is used for providing intermittent pumping pressure, so that a conveying pipeline is easy to be blocked; (3) The traditional pressure pump has larger vibration and noise, which is not beneficial to environmental protection; (4) the conventional pressure pump cannot realize multi-stage pressurization; (5) The pumping mode of super high-rise pouring is difficult to ensure that the pouring pressure is stable, and the pouring quality is influenced.
Disclosure of Invention
According to the defects of the prior art, the invention provides a super high-rise pumping concrete shaftless pump pushing step-by-step full-load pumping method, which is characterized in that a shaftless pump pushing multi-stage supercharging device is arranged on a conveying pipe, concrete is pumped on a high-rise building in the past, wherein the shaftless pump pushing multi-stage supercharging device is provided with blades on the inner wall, pressure change is monitored through a pressure sensor, the rotating speed of the blades is determined in real time, a motor is used for driving a steel cylinder with the blades on the inner wall to rotate, the blades rotating at high speed are provided for the pressure of the concrete, the purpose of supercharging is achieved, the pressure of the concrete is fully loaded step by step through a multi-stage supercharging assembly, the concrete pumping pressure is ensured to meet the requirement, and the pouring construction quality can be ensured; meanwhile, the shaftless pump pushing multistage supercharging device is connected with the conveying pipe through the buffering assembly, and is used for buffering concrete pressure and supercharging impact load and guaranteeing safety and stability of the conveying pipe.
The invention is realized by the following technical scheme:
the pumping method for pumping concrete in super high-rise without shaft pump pushing step by step is characterized by comprising the following steps:
arranging a concrete feeder on the ground, and sequentially connecting a conveying pipe and a grouting hose on the concrete feeder so that the grouting hose extends to a corresponding position of a high-rise building; the conveying pipe is provided with a shaftless pumping multistage supercharging device, the shaftless pumping multistage supercharging device comprises a multistage supercharging assembly, the supercharging assembly comprises a rotor assembly and a power assembly for driving the rotor assembly to rotate, the rotor assembly comprises a steel cylinder, rotating toothed rings and annular sliding blocks, the rotating toothed rings are arranged at two ends of the steel cylinder, the annular sliding blocks are arranged at two ends of the steel cylinder and are matched with annular sliding grooves of the supercharging assembly, and the steel cylinder is provided with blades, a pressure sensor and a speed sensor;
starting the power component, the pressure sensor and the speed sensor of the pressurizing component on the shaftless pumping multistage pressurizing device, utilizing monitoring data of the pressure sensor and the speed sensor to regulate the rotating speed of the pressurizing component on the shaftless pumping multistage pressurizing device step by step, and pumping concrete to a corresponding position of a high-rise building through the concrete material machine; the method comprises the steps of determining a supercharging value through monitoring data, distributing the supercharging value to the supercharging assembly on the shaftless pumping multistage supercharging device in a step-by-step full-load supercharging mode to determine the rotating speed of the supercharging assembly on the shaftless pumping multistage supercharging device, wherein step-by-step full-load supercharging means: step-by-step pressurizing the concrete by the pressurizing assembly on the shaftless pump pushing multi-stage pressurizing device, and when the pressurizing assembly of a certain stage is used for pressurizing the concrete to be fully loaded, the pressurizing assembly of a next stage is used for continuously pressurizing the concrete until a required pressurizing value is reached; the rotation speed of the supercharging assembly on the shaftless pumping multistage supercharging device is calculated.
The method for calculating the rotating speed of the supercharging assembly on the shaftless pumping multistage supercharging device comprises the following steps:
let shaftless pump push multistage supercharging device length be DeltaL, share j 0 Stage supercharging assembly composition, j=1, 2, 3, … j … j 0 Then the per-stage supercharging assembly length is δ=Δl/j 0 ；
Setting the inner diameter of the pressurizing assembly as d, and the dead weight of the pumped concrete as gamma, g being the gravity acceleration;
the shaftless pumping multistage supercharging device pumps concrete vertically upwards, and the pressure loss delta p suffered during pumping of the concrete is represented by delta p Vc And Δp γ Two-part composition, wherein Δp Vc Is the along-line loss of concrete in the flow of pump pipe, including the generation of concrete viscosityIs a friction resistance caused by the concrete flow; Δp γ Is the pressure generated by the gravity of the concrete during the vertical pumping of the concrete, namely the total pressure loss delta p of the vertical upward pumping of the concrete in each stage of pressurizing assembly FI The method comprises the following steps:
Δp FI ＝Δp Vc +Δp γ formula 1;
if the pumped concrete is ordinary concrete, the along-the-path loss pressure deltap per meter is pumped vertically upwards Vcm The method comprises the following steps:
wherein: Δp Vcm Is the pressure loss generated by the concrete flowing in the vertical conveying pipe per meter; d is the diameter of the concrete conveying pipe; k (K) 1 Is the sticking coefficient; k (K) 2 Is a velocity coefficient; s is S 1 Is the slump of concrete; t is t 2 /t 1 The ratio of the switching time of a concrete pump distributing valve to the concrete pushing time of a piston is 0.30 when the performance of equipment is unknown; v m Is the average flow velocity of the concrete mixture in the conveying pipe; alpha is the ratio of radial pressure to axial pressure, and 0.90 is taken for common concrete; beta is a conversion coefficient, and when d/2 is 100, 125 and 150mm respectively, beta is 3, 4 and 5;
pressure deltap generated by gravity of concrete per meter during vertical pumping of concrete γm The method comprises the following steps:
Δp γm =γ formula 3;
substituting the formula 2 and the formula 3 into the formula 1 can obtain the total pressure loss deltap of the concrete vertically upward pumping in each stage of pressurizing assembly FI The method comprises the following steps:
pressure p generated by j-th stage pressurizing assembly on pumped concrete w The method comprises the following steps:
p w ＝γv 2 /2g＝γ[v 1 /(πnR/30v 0 )] 2 /2g formula 5;
wherein: v is the flow rate provided by the j-th stage booster assembly to the concrete, v=v 1 /(ωR/v 0 )＝v 1 /(πnR/30v 0 ) The method comprises the steps of carrying out a first treatment on the surface of the ω is the per-stage supercharging assembly angular velocity; n is the rotational speed; r is the blade radius; v 0 Is the tip speed; v 1 Is the root speed;
setting the pressure of concrete to be p required to be output by a shaftless pumping multistage supercharging device eh The axial pressure of concrete entering the shaftless pump pushing multistage supercharging device is p s If the m-level supercharging assembly reaches the rated pressure p we ，m<j 0 Then:
let 5 equal to equation 6, the desired output pressure p can be recovered eh When the rotation speed n of the m+1st stage supercharging assembly is:
monitoring the radial pressure p of concrete at the inlet of the pressurizing assembly through a pressure sensor d For ordinary concrete, the radial pressure p of the concrete in the conveying pipeline d With axial pressure p s The ratio alpha=0.90, the concrete axial pressure p in the shaftless pumping multistage supercharging device is entered s ＝p d /α；
Monitoring concrete shaft pressure p at inlet of each stage of pressurizing assembly through pressure sensor in shaftless pumping multistage pressurizing device s1 、p s2 、p s3 …p sj0 And the concrete shaft pressure p at the outlet of the last stage supercharging assembly se ；
Monitoring the concrete flow velocity v at the inlet of each stage of pressurizing assembly through a speed sensor in a shaftless pumping multistage pressurizing device m1 、v m2 、v m3 …v mj0 And the concrete flow velocity v at the outlet of the last stage supercharging assembly e ；
If the radius from the rotation center to the blade tip is r 0 The radius from the rotation center to the root of the blade is r 1 D/2, then blade tip speed v 0 ＝πnr 0 30, blade root rotational speed v 1 ＝πnr 1 30, v 0 、v 1 And v m(m+1) With the method 7, the rotation speed n of the m+1st stage supercharging assembly for recovering the required output pressure can be obtained m+1 The method comprises the following steps:
rotational speed n of the preceding m stage supercharging assembly j The method comprises the following steps of:
wherein: j is less than or equal to m;
if the pumped concrete is high strength concrete, the along-the-path loss pressure deltap per meter is pumped vertically upwards Vum The method comprises the following steps:
Δp Vcm ＝Δp Vum =0.015+0.057 η formula 10;
wherein: Δp Vum The pressure loss of each meter of the high-strength concrete vertical conveying pipe is high; η is the plastic viscosity;
combining formula 3, formula 4, formula 5, formula 6 and formula 10, for high-strength concrete, to restore required output pressure, the rotation speed n of the m+1th stage pressurizing assembly m+1 The method comprises the following steps:
rotational speed n of the preceding m stage supercharging assembly j The method comprises the following steps of:
the supercharging assembly further comprises a cylindrical protective cover and supporting end covers, the power assembly is installed in the cylindrical protective cover, and the supporting end covers are arranged at two ends of the rotor assembly and the power assembly.
The power assembly comprises a plurality of motor groups arranged along the circumference of the cylindrical protective cover, each motor group consists of two motors which are arranged oppositely, the two motors are respectively arranged on two sides of the motor base, a power gear is connected to a motor shaft of the motor, and the power gear extends out of the cylindrical protective cover.
The rotor assembly comprises a steel cylinder, a rotating toothed ring and an annular sliding block, wherein the rotating toothed ring is arranged at two ends of the steel cylinder and meshed with the power gear, the annular sliding block is arranged at two ends of the steel cylinder and matched with an annular sliding groove of the supporting end cover, and the blades are circumferentially arranged along the inner wall of the steel cylinder.
The shaftless pump pushing multistage supercharging device further comprises a buffer assembly and a connecting pipe which are connected, wherein the first stage supercharging assembly and the last stage supercharging assembly are both connected with the buffer assembly; the buffer assembly comprises an annular buffer seat, an annular buffer cavity arranged in the annular buffer seat, a plurality of buffer springs arranged along the annular direction of the annular buffer cavity, and an annular steel support with one end connected with the pressurizing assembly, wherein the other end of the annular steel support extends into the annular buffer cavity and is connected with an annular steel pad, and the annular steel pad is in contact with or connected with the buffer springs corresponding to the annular buffer cavity.
And a rubber gasket is arranged between the support end cover and the annular buffer seat, and the rubber gasket is sleeved outside the annular steel support.
The pressure sensors are arranged along the circumference of the steel cylinder, each speed sensor is located between two adjacent pressure sensors, and the pressure sensors and the speed sensors are respectively and electrically connected to the processor.
The invention has the advantages that:
(1) The initial pumping pressure of the high-rise building is reduced, the construction safety is ensured, the requirements on the pressure of pumping equipment and the strength of a conveying pipe are simultaneously reduced, and the equipment cost investment is reduced;
(2) The shaftless pumping multistage supercharging device can increase the pumping height of pumped concrete;
(3) The shaftless pump pushing multistage supercharging device has large internal space of the pipeline, and is beneficial to pumping concrete;
(4) Monitoring concrete pumping pressure at any time, and adjusting the number of the starting pressurizing assemblies in real time during pressurizing, and fully loading and pressurizing step by step, so that the system is efficient and energy-saving;
(5) The shaftless pump pushing multistage supercharging device is additionally arranged at the hose, so that the casting pressure can be guaranteed to meet the requirement, and the casting concrete is more compact.
Drawings
FIG. 1 is a schematic illustration of the present invention;
FIG. 2 is a schematic diagram of a shaftless pump-driven multi-stage supercharging device of the present invention;
FIG. 3 is a schematic cross-sectional position of a shaftless pumping multistage supercharging device of the present invention;
FIG. 4 is a circuit diagram of a control system of the present invention;
FIG. 5 is a cross-sectional view of A-A of FIG. 3;
FIG. 6 is a cross-sectional view of B-B of FIG. 3;
FIG. 7 is a cross-sectional view of C-C of FIG. 3;
FIG. 8 is a cross-sectional view of D-D of FIG. 3;
FIG. 9 is a cross-sectional view of E-E of FIG. 3;
FIG. 10 is a cross-sectional view of F-F in FIG. 3;
FIG. 11 is a cross-sectional view of G-G of FIG. 3;
as shown in fig. 1 to 11, the label marks in the figures are expressed as:
a. pumping system, b. shaftless pump pushing multistage supercharging device, b1. first stage supercharging assembly, b2. second stage supercharging assembly, b3. third stage supercharging assembly, c. high rise building;
1. the device comprises a pressurizing assembly, a buffering assembly, a connecting pipe, a conveying pipe, a pumping concrete conveying direction, a rotating direction, a concrete feeder and a grouting hose, wherein the pressurizing assembly, the buffering assembly, the connecting pipe, the conveying pipe, the pumping concrete conveying direction, the rotating direction, the concrete feeder and the grouting hose are respectively arranged in sequence;
11. rotor assembly, 12, power assembly, 13, barrel shield, 14, support end cap, 15, control system, 111, steel cylinder, 112, rotating gear ring, 113, annular slider, 114, vane, 121, motor, 122, motor shaft, 123, motor mount, 124, power gear, 131, barrel shield inner side plate, 132, barrel shield outer side plate, 133, annular shield cover, 134, rectangular aperture, 141, annular chute, 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.
21. The annular buffer seat comprises an annular steel support, an annular steel pad, an annular buffer cavity, an annular buffer spring, a rubber gasket, a cylindrical buffer inner steel plate, a cylindrical buffer outer steel plate, an annular buffer bottom plate and an annular steel clamping plate, wherein the annular buffer inner steel plate is arranged in the annular buffer seat, the annular steel support is arranged in the annular buffer bottom plate, the annular buffer bottom plate is arranged in the annular buffer bottom plate, and the annular steel clamping plate is arranged in the annular buffer bottom plate;
31. a connecting cylinder 32, a screw thread;
71. storage silo, 72, concrete, 73, base.
Detailed Description
The features of the invention and other related features are described in further detail below by way of example in conjunction with the following figures to facilitate understanding by those skilled in the art:
examples: as shown in fig. 1-11, the present embodiment relates to a pumping method for pumping concrete in super high-rise building by using a pumping system a to pump concrete in high-rise building c, which mainly includes:
the concrete mixer 7 is disposed on the ground, and the delivery pipe 4 and the grouting hose 8 are sequentially connected to the concrete mixer 7 such that the grouting hose 8 extends to a corresponding position of the high-rise building c.
As shown in fig. 1-2, the slurry inlet of the conveying pipe 4 is connected with the concrete charging machine 7 on the ground, the slurry outlet of the conveying pipe 4 extends upwards and is connected with the grouting hose 8, the shaftless pumping multistage supercharging device b is provided with a plurality of shaftless pumping multistage supercharging devices, the shaftless pumping multistage supercharging device b is arranged on the conveying pipe 4, one part of the shaftless pumping multistage supercharging device b is arranged on the vertical section of the conveying pipe 4, the other part of the shaftless pumping multistage supercharging device b is arranged on the horizontal section of the conveying pipe 4, the grouting hose 8 is connected with the vertical section of the conveying pipe 4, the concrete charging machine 7 is connected with the horizontal section of the conveying pipe 4 through the shaftless pumping multistage supercharging device b, specifically, the concrete charging machine 7 comprises a storage bin 71 and a base 73, the storage bin 71 is arranged on the base 74, concrete 72 is stored in the storage bin 71, the concrete 72 is pumped by the concrete charging machine 7, and the concrete 72 is sequentially pumped to the corresponding position of the high-rise building c through the conveying pipe 4 and the grouting hose 8.
As shown in fig. 1-2, the shaftless pumping multistage supercharging device b mainly comprises a three-stage supercharging assembly 1, two buffer assemblies 2 and two connecting pipes 3, wherein the supercharging assembly 1, the buffer assemblies 2 and the connecting pipes 3 are coaxially arranged, the three-stage supercharging assembly 1 is a first-stage supercharging assembly a1, a second-stage supercharging assembly a2 and a third-stage supercharging assembly a3 respectively, the three-stage supercharging assemblies 1 are sequentially connected, the first-stage supercharging assembly a1 and the third-stage supercharging assembly a3 are respectively connected with the two buffer assemblies 2, the two buffer assemblies 2 are respectively connected with the two connecting pipes 3, the connecting pipes 3 are in threaded connection with the conveying pipes 4 (grouting hoses 8 and concrete machines 7), in particular, the connecting pipes 3 are connecting cylinders 31 with threads 32, one ends of the connecting cylinders 31 are fixedly connected with the buffer assemblies 2, and the other ends of the connecting cylinders are connected with the conveying pipes 4 (grouting hoses 8 and concrete machines 7) through the threads 32 thereon.
As shown in fig. 1-8, the supercharging assembly 1 comprises a rotor assembly 11, a power assembly 12, a cylindrical protection cover 13, a supporting end cover 14 and a control system 15, wherein the power assembly 12 is installed in the cylindrical protection cover 13, the supporting end cover 14 is arranged at two ends of the rotor assembly 11 and the power assembly 12, specifically, the upper supporting end cover 14 of the first-stage supercharging assembly a1 is connected with the lower supporting end cover 14 of the second-stage supercharging assembly a2, the upper supporting end cover 14 of the second-stage supercharging assembly a2 is connected with the lower supporting end cover 14 of the third-stage supercharging assembly a3, the power assembly 12 is positioned outside the rotor assembly 11, and the power assembly 12 can drive the rotor assembly 11 to rotate. The rotor assembly 11 comprises a steel cylinder 111, a rotating toothed ring 112, annular sliding blocks 113 and blades 114, wherein the rotating toothed ring 112 is arranged at two ends of the steel cylinder 111, the annular sliding blocks 113 are also arranged at two ends of the steel cylinder 111, an annular sliding groove 141 is formed in a supporting end cover 14, the annular sliding grooves 141 are matched with the annular sliding blocks 113, the annular sliding blocks 113 can rotate in the annular sliding grooves 141, the blades 114 are circumferentially arranged along the inner wall of the steel cylinder 111, a group of blades 114 are arranged in a fan shape and in an inclined manner, the blades 114 are positioned in the middle of the inner wall of the steel cylinder 111, the pumping concrete conveying direction 5 is from bottom to top (as shown in fig. 1 and 3), and the blades 114 can bear the impact of pumping concrete and guide the pumping concrete.
The power assembly 12 comprises a plurality of motor groups, the motor groups are positioned in the cylinder-shaped protective cover 13 and are arranged along the circumferential direction of the cylinder-shaped protective cover 13, each motor group consists of two motors 121 which are arranged oppositely, the two motors 121 are respectively arranged on two sides of a motor base 123, a motor shaft 122 of each motor 121 is connected with a power gear 124, and the power gears 124 penetrate through rectangular holes 134 on the cylinder-shaped protective cover 13 to extend out of the cylinder-shaped protective cover 13 and are meshed with the rotary toothed ring 112. The motor 121 drives the power gear 124 on the motor shaft 122 to rotate, and drives the rotating toothed ring 112 to rotate, so that the annular sliding block 113 rotates in the annular sliding groove 141, and further the blades 114 on the steel cylinder 111 rotate (the rotating direction 6 of the shaftless pump pushing multi-stage supercharging device is shown in fig. 1 and 3), the blades 114 rotating at high speed provide concrete pressure, the purpose of supercharging is achieved, the concrete pumping pressure is ensured to meet the requirement, and the casting construction quality can be ensured. In addition, the cylinder type shield 13 includes a cylinder type shield inner plate 131, a cylinder type shield outer plate 132, and an annular shield cover 133, and the annular shield cover 133 is connected with the support end cap 14.
As shown in fig. 2, 4 and 7, the control system 15 includes a pressure sensor, a speed sensor and a processor 155, wherein the pressure sensor and the speed sensor are respectively electrically connected to the processor 155, respectively measure the pressure and the speed of the concrete through the pressure sensor and the speed sensor, and transmit data to the processor 155 for analysis and processing. The pressure sensors and the speed sensors are respectively arranged along the circumference of the steel cylinder 111, and the pressure sensors and the speed sensors are arranged in a staggered manner, namely, each speed sensor is arranged between two adjacent pressure sensors, and each pressure sensor is arranged between two adjacent speed sensors. In this embodiment, the pressure sensor includes a first pressure sensor 151, a second pressure sensor 152, a third pressure sensor 153 and a fourth pressure sensor 154, the speed sensor includes a first speed sensor 155, a second speed sensor 156, a third speed sensor 157 and a fourth speed sensor 158, the first pressure sensor 151 and the first speed sensor 155 are both located at the side portion of the lower end rotating ring gear 112 of the first stage supercharging assembly a1, the second pressure sensor 152 and the second speed sensor 156 are both located at the side portion of the lower end rotating ring gear 112 of the second stage supercharging assembly a2, the third pressure sensor 153 and the third speed sensor 157 are both located at the side portion of the lower end rotating ring gear 112 of the third stage supercharging assembly a3, and the fourth pressure sensor 154 and the fourth speed sensor 158 are both located at the side portion of the upper end rotating ring gear 112 of the third stage supercharging assembly a3, so as to improve accuracy of measurement results.
As shown in fig. 1-2 and 9-11, the buffer assembly 2 comprises an annular buffer seat 21, an annular steel support 22, an annular steel pad 23, an annular buffer cavity 24, buffer springs 25 and a rubber gasket 26, wherein the annular buffer cavity 24 is arranged in the annular buffer seat 21, and a plurality of buffer springs 25 are arranged along the annular direction of the annular buffer cavity 24 to play a role in buffering, in this embodiment, the annular buffer seat 21 is composed of a cylindrical buffer inner side steel plate 211, a cylindrical buffer outer side steel plate 212, an annular buffer bottom plate 213 and an annular steel clamping plate 214, an annular notch communicated with the annular buffer cavity 24 is formed in the annular steel clamping plate 214, the size of the annular notch is matched with the size of the annular steel support 22, the annular notch can play a role in guiding the annular steel support 22, one end of the annular steel support 22 is connected with (the first-stage pressurizing assembly a1 and the third-stage pressurizing assembly a 3) support end cover 14, the other end of the annular steel pad 23 passes through the annular notch to extend into the annular buffer cavity 24 and is connected with the annular steel pad 23, the annular buffer springs 25 in the annular buffer cavity 24 are in contact with or connected with the corresponding annular buffer cavity 24, the annular buffer cavity 24 is large and small in size of the annular buffer cavity 24 is matched with the annular steel pad 23, and the annular steel pad 23 can play a role in preventing the annular buffer cavity from moving outside the annular steel support 22 from being matched with the annular steel support 22. A rubber gasket 26 is arranged between the support end cover 14 and the annular buffer seat 21, and the rubber gasket 26 is sleeved outside the annular steel support 22, so that collision between the support end cover 14 and the annular buffer seat 21 can be prevented, and the annular steel support 22 can be guided.
And starting a power assembly, a pressure sensor and a speed sensor of a pressurizing assembly on the shaftless pumping multistage pressurizing device, gradually adjusting the rotating speed of the pressurizing assembly on the shaftless pumping multistage pressurizing device by utilizing monitoring data of the pressure sensor and the speed sensor, and pumping concrete to a corresponding position of a high-rise building through a concrete feeder. The method comprises the steps of determining a supercharging value through monitoring data, distributing the supercharging value to a supercharging assembly on a shaftless pumping multistage supercharging device in a step-by-step full-load supercharging mode to determine the rotating speed of the supercharging assembly on the shaftless pumping multistage supercharging device, wherein step-by-step full-load supercharging means: the concrete is pressurized step by step through the pressurizing assembly on the shaftless pump pushing multistage pressurizing device, when the pressurizing assembly of a certain stage pressurizes the concrete to reach full load, the pressurizing assembly of the next stage continuously pressurizes the concrete until reaching the required pressurizing value, namely, when reaching the required pressurizing value, the pressurizing assemblies of the later stages are not rotated in a standby mode, and the energy consumption can be saved. In the embodiment, the pressurizing assembly on the shaftless pump pushing multi-stage pressurizing device is provided with three stages, when the one-stage pressurizing assembly is started to reach a required pressurizing value, the first-stage pressurizing assembly is started, and the second-stage pressurizing assembly and the third-stage pressurizing assembly are not started; when the two-stage supercharging assembly is started to reach a required supercharging value, the first-stage supercharging assembly and the second-stage supercharging assembly are started, the third-stage supercharging assembly is not started, the first-stage supercharging assembly is in a full-load state, and the second-stage supercharging assembly is in a full-load state or a non-full-load state; when the third-stage supercharging assembly is started to reach a required supercharging value, the first-stage supercharging assembly, the second-stage supercharging assembly and the third-stage supercharging assembly are started, the first-stage supercharging assembly and the second-stage supercharging assembly are in a full-load state, and the third-stage supercharging assembly is in a full-load state or a non-full-load state.
The method for calculating the rotating speed of the supercharging assembly on the shaftless pumping multistage supercharging device comprises the following steps:
let shaftless pump push multistage supercharging device length be DeltaL, share j 0 Stage supercharging assembly composition, j=1, 2, 3, … j … j 0 Then the per-stage supercharging assembly length is δ=Δl/j 0 ；
The internal diameter of the pressurizing component is d, the unit is m, the self weight of the pumped concrete is gamma, and the unit is N/m 3 G is gravity acceleration, g=9.8 m/s 2 ；
The shaftless pumping multistage supercharging device pumps concrete vertically upwards, and the pressure loss delta p suffered during pumping of the concrete is represented by delta p Vc And Δp γ Two-part composition, wherein Δp Vc Is the along-line loss of concrete in the flowing of the pump pipe, including the resistance caused by the concrete viscosity and the friction resistance caused by the concrete flowing; Δp γ Is the pressure generated by the gravity of the concrete during the vertical pumping of the concrete, namely the total pressure loss delta p of the vertical upward pumping of the concrete in each stage of pressurizing assembly FI The method comprises the following steps:
Δp FI ＝Δp Vc +Δp γ formula 1;
if the pumped concrete is ordinary concrete, the along-the-path loss pressure deltap per meter is pumped vertically upwards Vcm The method comprises the following steps:
wherein: Δp Vcm The unit is Pa/m, which is the pressure loss generated by the concrete flowing in the vertical conveying pipe per meter; d is the diameter of the concrete conveying pipe, and the unit is m; k (K) 1 Is the adhesion coefficient in Pa; k (K) 2 Is a velocity coefficient, the unit is Pa.s/m; s is S 1 Concrete slump in mm; t is t 2 /t 1 The ratio of the switching time of a concrete pump distributing valve to the concrete pushing time of a piston is 0.30 when the performance of equipment is unknown; v m The average flow velocity of the concrete mixture in the conveying pipe is expressed as m/s; alpha is the ratio of radial pressure to axial pressure, and 0.90 is taken for common concrete; beta is a conversion coefficient, and when d/2 is 100, 125 and 150mm respectively, beta is 3, 4 and 5;
pressure deltap generated by gravity of concrete per meter during vertical pumping of concrete γm (in Pa/m) is:
Δp γm =γ formula 3;
substituting the formula 2 and the formula 3 into the formula 1 can obtain the total pressure loss deltap of the concrete vertically upward pumping in each stage of pressurizing assembly FI The method comprises the following steps:
pressure p generated by j-th stage pressurizing assembly on pumped concrete w (in Pa/m) is:
p w ＝γv 2 /2g＝γ[v 1 /(πnR/30v 0 )] 2 2g of formula 5;
wherein: v is the flow rate provided by the j-th stage booster assembly to the concrete in m/s, v=v 1 /(ωR/v 0 )＝v 1 /(πnR/30v 0 ) The method comprises the steps of carrying out a first treatment on the surface of the Omega is the angular velocity of each stage of supercharging assembly, and the unit is rad/s; n is the rotational speed in r/min; r is the radius of the blade, and the unit is m; v 0 Tip speed in m/s; v 1 Is the root speed of the blade, and the unit is m/s;
setting the pressure of concrete to be p required to be output by a shaftless pumping multistage supercharging device eh The axial pressure of concrete entering the shaftless pump pushing multistage supercharging device is p s If there is m (m<j 0 ) The stage supercharging assembly reaches rated pressure p we Then:
let 5 equal to equation 6, the desired output pressure p can be recovered eh When the rotation speed n of the m+1st stage supercharging assembly is:
monitoring the radial pressure p of concrete at the inlet of the pressurizing assembly through a pressure sensor d For the followingOrdinary concrete, radial pressure p of concrete in conveying pipeline d With axial pressure p s The ratio alpha=0.90, the concrete axial pressure p in the shaftless pumping multistage supercharging device is entered s ＝p d /α；
Monitoring concrete shaft pressure p at inlet of each stage of pressurizing assembly through pressure sensor in shaftless pumping multistage pressurizing device s1 、p s2 、p s3 …p sj0 And the concrete shaft pressure p at the outlet of the last stage supercharging assembly se ；
Monitoring the concrete flow velocity v at the inlet of each stage of pressurizing assembly through a speed sensor in a shaftless pumping multistage pressurizing device m1 、v m2 、v m3 …v mj0 And the concrete flow velocity v at the outlet of the last stage supercharging assembly e ；
If the radius from the rotation center to the blade tip is r 0 In m) the radius from the centre of rotation to the root of the blade is r 1 D/2, in m, then blade tip speed v 0 ＝πnr 0 30, blade root rotational speed v 1 ＝πnr 1 30, v 0 、v 1 And v m(m+1) With the method 7, the rotation speed n of the m+1st stage supercharging assembly for recovering the required output pressure can be obtained m+1 The method comprises the following steps:
rotational speed n of the preceding m stage supercharging assembly j (j.ltoreq.m) are respectively:
if the pumped concrete is high strength concrete, the along-the-path loss pressure deltap per meter is pumped vertically upwards Vum The method comprises the following steps:
Δp Vcm ＝Δp Vum =0.015+0.057 η formula 10;
wherein: Δp Vum Is a high-strength concrete vertical conveying pipe with pressure per meterForce loss; η is the plastic viscosity;
combining formula 3, formula 4, formula 5, formula 6 and formula 10, for high-strength concrete, to restore required output pressure, the rotation speed n of the m+1th stage pressurizing assembly m+1 The method comprises the following steps:
rotational speed n of the preceding m stage supercharging assembly j (j.ltoreq.m) are respectively:
the beneficial technical effects of this embodiment are:
(1) The initial pumping pressure of the high-rise building is reduced, the construction safety is ensured, the requirements on the pressure of pumping equipment and the strength of a conveying pipe are simultaneously reduced, and the equipment cost investment is reduced;
(2) The shaftless pumping multistage supercharging device can increase the pumping height of pumped concrete;
(3) The shaftless pump pushing multistage supercharging device has large internal space of the pipeline, and is beneficial to pumping concrete;
(4) Monitoring concrete pumping pressure at any time, and adjusting the number of the starting pressurizing assemblies in real time during pressurizing, and fully loading and pressurizing step by step, so that the system is efficient and energy-saving;
(5) The shaftless pump pushing multistage supercharging device is additionally arranged at the hose, so that the casting pressure can be guaranteed to meet the requirement, and the casting concrete is more compact.
Although the foregoing embodiments have been described in some detail with reference to the accompanying drawings, it will be appreciated by those skilled in the art that various modifications and changes may be made thereto without departing from the scope of the invention as defined in the appended claims, and thus are not repeated herein.
Claims (8)
1. The pumping method for pumping concrete in super high-rise without shaft pump pushing step by step is characterized by comprising the following steps:
arranging a concrete feeder on the ground, and sequentially connecting a conveying pipe and a grouting hose on the concrete feeder so that the grouting hose extends to a corresponding position of a high-rise building; the conveying pipe is provided with a shaftless pumping multistage supercharging device, the shaftless pumping multistage supercharging device comprises a multistage supercharging assembly, the supercharging assembly comprises a rotor assembly and a power assembly for driving the rotor assembly to rotate, the rotor assembly comprises a steel cylinder, rotating toothed rings and annular sliding blocks, the rotating toothed rings are arranged at two ends of the steel cylinder, the annular sliding blocks are arranged at two ends of the steel cylinder and are matched with annular sliding grooves of the supercharging assembly, and the steel cylinder is provided with blades, a pressure sensor and a speed sensor;
starting the power component, the pressure sensor and the speed sensor of the pressurizing component on the shaftless pumping multistage pressurizing device, utilizing monitoring data of the pressure sensor and the speed sensor to regulate the rotating speed of the pressurizing component on the shaftless pumping multistage pressurizing device step by step, and pumping concrete to a corresponding position of a high-rise building through the concrete material machine; the method comprises the steps of determining a supercharging value through monitoring data, distributing the supercharging value to the supercharging assembly on the shaftless pumping multistage supercharging device in a step-by-step full-load supercharging mode to determine the rotating speed of the supercharging assembly on the shaftless pumping multistage supercharging device, wherein step-by-step full-load supercharging means: step-by-step pressurizing the concrete by the pressurizing assembly on the shaftless pump pushing multi-stage pressurizing device, and when the pressurizing assembly of a certain stage is used for pressurizing the concrete to be fully loaded, the pressurizing assembly of a next stage is used for continuously pressurizing the concrete until a required pressurizing value is reached; the rotation speed of the supercharging assembly on the shaftless pumping multistage supercharging device is calculated.
2. The working method of the super high-rise pumping concrete shaftless pump pushing step-by-step full-load pumping method according to claim 1, wherein the method for calculating the rotating speed of the pressurizing assembly on the shaftless pump pushing step-by-step pressurizing device comprises the following steps:
let shaftless pump push multistage supercharging device length be DeltaL, share j 0 Stage supercharging assembly composition, j=1, 2, 3, … j … j 0 Then the per-stage supercharging assembly length is δ=Δl/j 0 ；
Setting the inner diameter of the pressurizing assembly as d, and the dead weight of the pumped concrete as gamma, g being the gravity acceleration;
the shaftless pumping multistage supercharging device pumps concrete vertically upwards, and the pressure loss delta p suffered during pumping of the concrete is represented by delta p Vc And Δp γ Two-part composition, wherein Δp Vc Is the along-line loss of concrete in the flowing of the pump pipe, including the resistance caused by the concrete viscosity and the friction resistance caused by the concrete flowing; Δp γ Is the pressure generated by the gravity of the concrete during the vertical pumping of the concrete, namely the total pressure loss delta p of the vertical upward pumping of the concrete in each stage of pressurizing assembly FI The method comprises the following steps:
Δp FI ＝Δp Vc +Δp γ formula 1;
if the pumped concrete is ordinary concrete, the along-the-path loss pressure deltap per meter is pumped vertically upwards Vcm The method comprises the following steps:
wherein: Δp Vcm Is the pressure loss generated by the concrete flowing in the vertical conveying pipe per meter; d is the diameter of the concrete conveying pipe; k (K) 1 Is the sticking coefficient; k (K) 2 Is a velocity coefficient; s is S 1 Is the slump of concrete; t is t 2 /t 1 The ratio of the switching time of a concrete pump distributing valve to the concrete pushing time of a piston is 0.30 when the performance of equipment is unknown; v m Is the average flow velocity of the concrete mixture in the conveying pipe; alpha is the ratio of radial pressure to axial pressure, and 0.90 is taken for common concrete; beta is a conversion coefficient, and when d/2 is 100, 125 and 150mm respectively, beta is 3, 4 and 5;
gravity of concrete per meter during vertical pumping of concretePressure Δp γm The method comprises the following steps:
Δp γm =γ formula 3;
substituting the formula 2 and the formula 3 into the formula 1 can obtain the total pressure loss deltap of the concrete vertically upward pumping in each stage of pressurizing assembly FI The method comprises the following steps:
pressure p generated by j-th stage pressurizing assembly on pumped concrete w The method comprises the following steps:
p w ＝γv 2 /2g＝γ[v 1 /(πnR/30v 0 )] 2 2g of formula 5;
wherein: v is the flow rate provided by the j-th stage booster assembly to the concrete, v=v 1 /(ωR/v 0 )＝v 1 /(πnR/30v 0 ) The method comprises the steps of carrying out a first treatment on the surface of the ω is the per-stage supercharging assembly angular velocity; n is the rotational speed; r is the blade radius; v 0 Is the tip speed; v 1 Is the root speed;
setting the pressure of concrete to be p required to be output by a shaftless pumping multistage supercharging device eh The axial pressure of concrete entering the shaftless pump pushing multistage supercharging device is p s If the m-level supercharging assembly reaches the rated pressure p we ，m<j 0 Then:
let 5 equal to equation 6, the desired output pressure p can be recovered eh When the rotation speed n of the m+1st stage supercharging assembly is:
monitoring the radial pressure p of concrete at the inlet of the pressurizing assembly through a pressure sensor d For ordinary concrete, the concrete in the conveying pipeline is radialPressure p d With axial pressure p s The ratio alpha=0.90, the concrete axial pressure p in the shaftless pumping multistage supercharging device is entered s ＝p d /α；
Monitoring concrete shaft pressure p at inlet of each stage of pressurizing assembly through pressure sensor in shaftless pumping multistage pressurizing device s1 、p s2 、p s3 …p sj0 And the concrete shaft pressure p at the outlet of the last stage supercharging assembly se ；
Monitoring the concrete flow velocity v at the inlet of each stage of pressurizing assembly through a speed sensor in a shaftless pumping multistage pressurizing device m1 、v m2 、v m3 …v mj0 And the concrete flow velocity v at the outlet of the last stage supercharging assembly e ；
If the radius from the rotation center to the blade tip is r 0 The radius from the rotation center to the root of the blade is r 1 D/2, then blade tip speed v 0 ＝πnr 0 30, blade root rotational speed v 1 ＝πnr 1 30, v 0 、v 1 And v m(m+1) With the method 7, the rotation speed n of the m+1st stage supercharging assembly for recovering the required output pressure can be obtained m+1 The method comprises the following steps:
rotational speed n of the preceding m stage supercharging assembly j The method comprises the following steps of:
wherein: j is less than or equal to m;
if the pumped concrete is high strength concrete, the along-the-path loss pressure deltap per meter is pumped vertically upwards Vum The method comprises the following steps:
Δp Vcm ＝Δp Vum =0.015+0.057 η formula 10;
wherein: Δp Vum The pressure loss of each meter of the high-strength concrete vertical conveying pipe is high; η is the plastic viscosity;
combining formula 3, formula 4, formula 5, formula 6 and formula 10, for high-strength concrete, to restore required output pressure, the rotation speed n of the m+1th stage pressurizing assembly m+1 The method comprises the following steps:
rotational speed n of the preceding m stage supercharging assembly j The method comprises the following steps of:
3. the super high-rise pumping concrete shaftless pump pushing step-by-step full-load pumping method of claim 1, wherein said pressurizing assembly further comprises a cylinder-type protective cover and supporting end covers, said power assembly is installed in said cylinder-type protective cover, and said supporting end covers are provided at both ends of said rotor assembly and said power assembly.
4. A method for pumping concrete in super high-rise without shaft pump pushing step-by-step full-load pumping as claimed in claim 3, wherein said power assembly comprises a plurality of motor groups arranged along the circumference of said cylinder type protective cover, each motor group is composed of two oppositely arranged motors, two motors are respectively arranged at two sides of a motor base, a power gear is connected to the motor shaft of said motor, and said power gear extends out of said cylinder type protective cover.
5. The super high-rise pumping concrete shaftless pump pushing step-by-step full-load pumping method of claim 4, wherein the rotor assembly comprises a steel cylinder, a rotating toothed ring and an annular sliding block, the rotating toothed ring is arranged at two ends of the steel cylinder and meshed with the power gear, the annular sliding block is arranged at two ends of the steel cylinder and matched with an annular sliding groove of the supporting end cover, and the blades are circumferentially arranged along the inner wall of the steel cylinder.
6. The super high-rise pumping concrete shaftless pump pushing step-by-step full-load pumping method of claim 1, wherein the shaftless pump pushing step-by-step pressurizing device further comprises a buffer component and a connecting pipe which are connected, and the first stage pressurizing component and the last stage pressurizing component are connected with the buffer component; the buffer assembly comprises an annular buffer seat, an annular buffer cavity arranged in the annular buffer seat, a plurality of buffer springs arranged along the annular direction of the annular buffer cavity, and an annular steel support with one end connected with the pressurizing assembly, wherein the other end of the annular steel support extends into the annular buffer cavity and is connected with an annular steel pad, and the annular steel pad is in contact with or connected with the buffer springs corresponding to the annular buffer cavity.
7. The super high-rise pumping concrete shaftless pump pushing step-by-step full-load pumping method of claim 6, wherein a rubber gasket is arranged between the support end cover and the annular buffer seat, and the rubber gasket is sleeved outside the annular steel support.
8. The super high-rise pumping concrete shaftless pump-pushing step-by-step full-load pumping method of claim 5, wherein said pressure sensors are circumferentially arranged along said steel cylinder, each of said speed sensors is located between two adjacent pressure sensors, and said pressure sensors and said speed sensors are respectively electrically connected to a processor.
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