CN-117627358-B - Super high-rise concrete electromagnetic shaftless pumping multistage supercharging pumping system and method

CN117627358BCN 117627358 BCN117627358 BCN 117627358BCN-117627358-B

Abstract

The invention discloses an electromagnetic shaftless pumping multistage supercharging pumping system and method for super high-rise concrete, wherein the pumping system comprises a concrete material machine, a conveying pipe, a grouting hose and a plurality of electromagnetic shaftless pumping multistage supercharging devices, two ends of the conveying pipe are respectively connected with the concrete material machine and the grouting hose, and the electromagnetic shaftless pumping multistage supercharging devices are arranged on the conveying pipe; the electromagnetic shaftless pump pushing multistage supercharging device comprises a multistage supercharging assembly, wherein the supercharging assembly comprises a rotor assembly, a power assembly, a cylindrical protective cover and a supporting end cover, the rotor assembly comprises a steel cylinder, an annular sliding block, blades and a permanent magnet, a rotating magnetic field generated by the power assembly drives the permanent magnet of the rotor assembly to rotate, and a pressure sensor and a speed sensor are arranged on the inner side of the supporting end cover. The invention has the advantages of monitoring concrete pumping pressure at any time, adjusting the rotating speed of the electromagnetic shaftless pumping multistage supercharging device in real time, saving energy and reducing emission, and ensuring stable pumping pressure.

Inventors

ZHAO LU
WANG PENG

Assignees

中铁十五局集团有限公司

Dates

Publication Date: 20260508
Application Date: 20231205

Claims (8)

1. A pumping method of an electromagnetic shaftless pumping multistage booster pumping system for super high-rise concrete is used for pumping concrete of a high-rise building and is characterized in that: The pumping system comprises a concrete feeder, a conveying pipe, a grouting hose and a plurality of electromagnetic shaftless pumping multistage supercharging devices, wherein two ends of the conveying pipe are respectively connected with the concrete feeder and the grouting hose, the electromagnetic shaftless pumping multistage supercharging devices are installed on the conveying pipe, the electromagnetic shaftless pumping multistage supercharging devices comprise multistage supercharging components, the supercharging components comprise rotor components, power components, a cylindrical protective cover and supporting end covers, the rotor components and the power components are all installed in the cylindrical protective cover, the supporting end covers are arranged at two ends of the cylindrical protective cover, the rotor components comprise steel cylinders, annular sliding blocks, blades and permanent magnets, the annular sliding blocks are arranged at two ends of the steel cylinders, the blades are circumferentially arranged along the inner walls of the steel cylinders, the permanent magnets are circumferentially arranged along the outer walls of the steel cylinders, annular sliding grooves matched with the annular sliding blocks are formed in the cylindrical protective cover, the rotating magnetic fields generated by the power components drive the permanent magnets of the rotor components to rotate, and the pressure sensors and speed sensors are arranged on the inner sides of the supporting end covers; The pumping method of the pumping system comprises the following steps of starting a power component, a pressure sensor and a speed sensor of each stage of pressurizing component on an electromagnetic shaftless pumping multistage pressurizing device, driving the corresponding pressurizing component to rotate through the power component, regulating the rotating speed of each stage of pressurizing component on the electromagnetic shaftless pumping multistage pressurizing device by using monitoring data of the pressure sensor and the speed sensor, pumping concrete to a corresponding position of a high-rise building through a concrete charging machine, determining a pressurizing value through the monitoring data, and evenly distributing the pressurizing value to each stage of pressurizing component on the electromagnetic shaftless pumping multistage pressurizing device so as to determine the rotating speed of each stage of pressurizing component on the electromagnetic shaftless pumping multistage pressurizing device, wherein the rotating speed of each stage of pressurizing component on the electromagnetic shaftless pumping multistage pressurizing device is required to be calculated; the calculation method of the rotating speed of each stage of the pressurizing assembly on the electromagnetic shaftless pumping multistage pressurizing device comprises the following steps: The length of the electromagnetic shaftless pumping multistage supercharging device is delta L, j 0 stages of supercharging assemblies are formed, j=1, 2 and 3, and j is equal to j 0 , and the length of each stage of supercharging assembly is delta=delta L/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 electromagnetic shaftless pumping multistage supercharging device pumps concrete vertically upwards, the pressure loss delta p received during concrete pumping consists of two parts of delta p Vc and delta p γ , wherein delta p Vc is the path loss received by the concrete in the flowing process of a pump pipe and comprises the resistance generated by the viscosity of the concrete and the friction resistance generated by the flowing process of the concrete, delta p γ is the pressure generated by the gravity of the concrete during the vertical pumping process of the concrete, namely the total pressure loss delta p FI of the vertical upward pumping process of the concrete in each stage supercharging assembly is as follows: Δp FI = Δp Vc +Δ p γ formula 1; If the pumped concrete is normal concrete, the along-the-path loss pressure Δp Vcm per meter pumped vertically upward is: Formula 2; Wherein Deltap Vcm is the pressure loss generated by the flow of concrete in a vertical conveying pipe per meter, d is the diameter of the concrete conveying pipe, K 1 is the adhesion coefficient, K 2 is the speed coefficient, S 1 is the concrete slump, t 2 /t 1 is the ratio of the switching time of a concrete pump distributing valve to the time of pushing the concrete by a piston, when the performance of equipment is unknown, 0.30 is taken, v m is the average flow rate of concrete mixture in the conveying pipe, alpha is the ratio of radial pressure to axial pressure, 0.90 is taken for common concrete, beta is the conversion coefficient, and when d/2 is 100, 125 and 150mm, beta is taken to be 3,4 and 5; the pressure Δp γm generated by the gravity of concrete per meter when the concrete is pumped vertically is: Δp γm =γ formula 3; Substituting formula 2 and formula 3 into formula 1 can obtain the total pressure loss Δp FI of concrete vertical upward pumping in each stage of pressurizing assembly as follows: Formula 4; the pressure p w generated by the j-th stage pressurizing assembly on the pumped concrete is as follows: Formula 5; where v is the flow rate provided by the j-th stage booster component to the concrete, Omega is the per-stage supercharging assembly angular velocity, n is the rotational velocity, R is the blade radius, v 0 is the blade tip velocity, v 1 is the blade root velocity; if the electromagnetic shaftless pumping multistage supercharging device is provided with the requirement that the output concrete pressure is p eh , the axial pressure of the concrete entering the electromagnetic shaftless pumping multistage supercharging device is p s , and if each stage supercharging component of the electromagnetic shaftless pumping multistage supercharging device is evenly distributed with supercharging values, the pressure p w required to be provided by each stage supercharging component is: Formula 6; Let equation 5 be equal to equation 6, the rotational speed n of each stage of the supercharging assembly when the required output pressure p eh is recovered is: Formula 7; Monitoring the radial pressure p d of the concrete at the inlet of the pressurizing assembly through a pressure sensor, and for common concrete, enabling the ratio alpha of the radial pressure p d of the concrete in the conveying pipeline to the axial pressure p s to be 0.90, and entering the axial pressure p s =p d /alpha of the concrete in the electromagnetic shaftless pumping multistage pressurizing device; Monitoring the concrete shaft pressure p s1 、p s2 、 p s3 … p sj0 at the inlet of each stage of pressurizing assembly and the concrete shaft pressure p se at the outlet of the last stage of pressurizing assembly through an electromagnetic shaftless pumping multistage pressurizing device pressure sensor; Monitoring the concrete flow velocity v m1 、v m2 、v m3 …v mj0 at the inlet of each stage of pressurizing assembly and the concrete flow velocity v e at the outlet of the last stage of pressurizing assembly through a speed sensor in the electromagnetic shaftless pumping multistage pressurizing device; If the radius from the rotation center to the blade tip is r 0 , the radius from the rotation center to the blade root is r 1 =d/2, the rotation speed of the blade tip is v 0 =πnr 0 /30, the rotation speed of the blade root is v 1 = πnr 1 /30, v 0 and v 1 are brought into 7, and the rotation speed n j of the j-th stage supercharging assembly for recovering the required output pressure can be obtained as follows: formula 8.
2. The method for pumping the ultra-high-rise concrete electromagnetic shaftless pumping multistage supercharging pumping system of claim 1, wherein the pressure sensors are circumferentially arranged along the inner side of the supporting end cover, each speed sensor is located between two adjacent pressure sensors, and the pressure sensors and the speed sensors are respectively and electrically connected to a processor.
3. The method for pumping an ultra-high-rise concrete electromagnetic shaftless pumping multistage booster pumping system of claim 1, wherein said power assembly comprises a stator core, stator teeth and turns, said stator core being circumferentially disposed along said cylindrical shield, said turns being mounted within said stator core, said stator teeth being coupled to said stator core.
4. The method for pumping the super high-rise concrete electromagnetic shaftless pumping multistage supercharging pumping system of claim 1, wherein the electromagnetic shaftless pumping multistage supercharging device further comprises two buffer components and two connecting pipes, the first stage supercharging component and the last stage supercharging component are respectively connected with the two buffer components, and the two buffer components are respectively connected with the two connecting pipes.
5. The method for pumping the super high-rise concrete electromagnetic shaftless pumping multistage supercharging pumping system of claim 4, wherein the buffering component comprises an annular buffering seat, an annular buffering cavity arranged in the annular buffering seat, a plurality of buffering springs arranged along the annular direction of the annular buffering cavity and an annular steel support with one end connected with the supporting end cover, the other end of the annular steel support extends into the annular buffering cavity and is connected with an annular steel pad, and the annular steel pad is in contact with or connected with the buffering springs corresponding to the annular buffering cavity.
6. The method for pumping the super high-rise concrete electromagnetic shaftless pumping multistage supercharging pumping system of claim 5, wherein a rubber gasket is arranged between the supporting end cover and the annular buffer seat, and the rubber gasket is sleeved outside the annular steel support.
7. The method for pumping the ultra-high-rise concrete electromagnetic shaftless pumping multistage supercharging pumping system of claim 1, wherein the cylindrical shield consists of a cylindrical shield outer plate and an annular shield cover plate.
8. The pumping method of the electromagnetic shaftless pumping multistage supercharging pumping system of the super high-rise concrete according to claim 1, wherein the calculating method of the rotation speed of each stage of supercharging assembly on the electromagnetic shaftless pumping multistage supercharging device further comprises: if the pumped concrete is high strength concrete, the along-path loss pressure Δp Vum per meter pumped vertically upward is: Δp Vcm =Δp Vum =0.015+0.057 η is 9; Wherein Deltap Vum is the pressure loss per meter of the high-strength concrete vertical conveying pipe, and eta is the plastic viscosity; Combining formula 3, formula 4, formula 5, formula 6 and formula 9, for high-strength concrete, in order to restore required output pressure, the rotation speed n j of the j-th stage supercharging assembly is: Formula 10.

Description

Super high-rise concrete electromagnetic shaftless pumping multistage supercharging pumping system and method Technical Field The invention relates to the technical field of ultrahigh layer concrete pumping pipeline transportation, in particular to an ultrahigh layer concrete electromagnetic shaftless pumping multistage supercharging pumping system and method. Background As super high-rise buildings are increased, the test of super high-rise building on vertical transportation of building materials is also more serious. 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 easy to be blocked, or if the pumping pressure does not meet the high demand, the project construction is stopped and high cost is brought, so the performance of the selected pumping equipment, the arrangement of the pumping system and the related operation process are important to the realization of ultra-high pressure pumping. 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, a pulse type pressure compensation long-distance concrete conveying device and a using method thereof are disclosed in patent No. CN 111622779A, 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 No. CN 103541550A is realized, a high-pressure pump is connected with a pouring hose through a discharge hole, and the two concrete pumps are connected with a low-pressure pump in a relay mode to achieve the purpose of pumping in an ultra-high layer. Although the prior art solves the problems of insufficient pressure and relay pumping of some high-rise pumping concrete, the problems of (1) long-distance and super-high-rise pumping, high pressure pump pressure, high performance and high cost of the high-pressure pump, high requirement performance on adjacent pressure pump pipelines, increased equipment cost and low construction safety, (2) intermittent pumping pressure provided by the traditional pressure pump, easy blockage of a conveying pipeline, (3) large vibration and noise of the traditional pressure pump, environmental protection, and (4) failure in realizing multistage pressurization of the traditional pressure pump, and (5) difficulty in guaranteeing stable pouring pressure and influencing pouring quality of the super-high-rise pouring pumping mode are solved. Disclosure of Invention According to the defects of the prior art, the invention provides an electromagnetic shaftless pumping multistage pressurizing pumping system and method for super high-rise concrete, wherein an electromagnetic shaftless pumping multistage pressurizing device is arranged on a conveying pipe, concrete is pumped on a high-rise building in the past, the inner wall of the electromagnetic shaftless pumping multistage pressurizing device is provided with blades, pressure change is monitored through a pressure sensor, the rotating speed of the blades is determined in real time, a steel cylinder with the blades on the inner wall is driven to rotate through electromagnetic force, the blades rotating at high speed are provided for the pressure of the concrete, the purpose of pressurizing is achieved, the multistage pressurizing assembly can pressurize for multiple times, the concrete pumping pressure is ensured to meet the requirement, the pouring construction quality can be ensured, and meanwhile, the electromagnetic shaftless pumping multistage pressurizing device is connected with the conveying pipe through a buffer assembly, the pressure and pressurizing impact load of the concrete are