483 results about "Concrete pump" patented technology

The invention discloses a pouring pile pouring device for construction and a using method thereof. The pouring pile pouring device for construction comprises a guide pipe, a pouring pile and a pouring pile, the concrete pumping unit comprises a variable frequency motor, a two-way hydraulic pump and a conveying pipeline wrapped with a heat preservation layer, and the conveying pipeline is in sealed connection with the top of the guide pipe through a flange plate; the pile frame supporting unit comprises a supporting frame with a lifting mechanism and a guide pipe fixing clamp integrated with a tilt angle sensor, and the fixing clamp is hinged to the supporting frame and dynamically adjusts the perpendicularity of a guide pipe through a servo motor; and the intelligent control unit comprises a distributed pressure sensor group, a multi-mode burial depth detection module and a central controller, a concrete rheological model is arranged in the intelligent control unit, and the rotating speed of the variable frequency motor and the lifting speed of the guide pipe are dynamically adjusted according to sensor data. The construction efficiency, the pile foundation quality and the complex geology adaptability are effectively improved, meanwhile, the construction cost and risks are reduced, and wide application prospects and economic benefits are achieved.

The invention discloses a pumping concrete pouring supporting facility for an ultra-deep diaphragm wall and a technological method.The pumping concrete pouring supporting facility comprises a concrete pump truck, a pouring pipe fitting, a flow-limiting pouring guide pipe and a slurry pipe, the concrete pump truck is located on the side edge of a slotted hole, and a discharging port of the concrete pump truck is connected with the top end of the pouring pipe fitting; the bottom ends of the pouring pipe fitting and the slurry pipe extend into the slotted hole, the bottom of the slurry pipe is higher than the upper surface of the concrete, and the slurry pipe is connected with a slurry return assembly. The device has the beneficial effects that the structure is simple, the design is reasonable, the process method is simple, and the adverse effects of coarse and fine aggregate separation, mixture segregation and the like of concrete can be reduced by reducing the falling speed during concrete pouring by matching pumped concrete with the flow-limiting pouring guide pipe; accumulation of flocculate is reduced through active slurry returning, so that slurry mixing of concrete, slurry and flocculate is reduced, and the quality of the formed diaphragm wall is improved.

Proposed is a concrete pump system comprising a concrete pump (14, 51) and a master control module (45, 54), wherein the concrete pump (14, 51) comprises a control unit (61), a boom arm (18) and a delivery line (17) extending along the boom arm (18). An outlet opening (63) of the delivery line (17) can be moved over a working region of the concrete pump (14, 51). The position of the concrete pump (14, 51) is defined within a first coordinate system (52, 57). The location of a concreting area (36) is defined within a second coordinate system (53). The master control module (45, 54) is designed to specify a concreting plan to the control unit (61). The concreting plan (64) defines a plurality of partial areas (39) of the concreting area (36). The control unit (61) is designed to control the boom arm (18) on the basis of a referencing between the first coordinate system (52, 57) and the second coordinate system (53) such that liquid concrete emerging from the outlet opening (63) of the delivery line (17) is introduced into a partial area (39) of the concreting area (36), said partial area being specified by the concreting plan (64). The invention also relates to a method for operating a concrete pump system.

The invention relates to the technical field of concrete spreader, and discloses a concrete spreader for engineering construction, which comprises a support frame and a bogie, the inner wall of the bogie is rotatably connected with the top of the support frame, the inner wall of the bogie is fixedly connected with a second conveying pipe, and the side wall of the bogie is provided with a discharge pipe. The first material conveying pipe is connected with a pipeline of a concrete pump truck, then the pump truck is started, concrete is pumped into the first material conveying pipe, the concrete can flow into the second material conveying pipe and the steering pipe till the concrete flows into the flow guide groove, the concrete is divided into two strands through the flow dividing assembly, aggregate in the two strands of concrete collides with each other, and the aggregate in the two strands of concrete collides with each other. Therefore, the flowing speed of the aggregate is slowed down, the follow-up mortar wraps the aggregate, the aggregate and the mortar of the concrete are evenly distributed, the situation of local aggregate concentration is reduced, and the situation that due to the fact that the aggregate is high in descending speed and prone to being accumulated at the bottom, the mortar floats on the upper layer, and the uniformity of concrete distribution is affected is effectively prevented.

The invention provides a mixed modeling method for the pumping and printing process of 3D printing concrete. According to the method, intelligent aggregate is introduced, real-time monitoring and data collection of particle motion behaviors in the 3D concrete pumping and printing process are achieved, and comparative analysis is conducted on collected multi-dimensional dynamic data of particle speed, acceleration and collision frequency and discrete element-computational fluid mechanics (DEM-CFD) coupling simulation results; therefore, efficient inversion and accurate calibration of input parameters of the DEM-CFD coupling simulation model are achieved, and compared with unobservability and uncertainty of the particle flow state in the traditional concrete pumping process, the method can achieve transparency in the particle movement process; the parameter inversion method provided by the invention is based on fitting optimization of actually measured particle motion data and a numerical simulation result, so that manual intervention and experimental overhead are remarkably reduced.

A containerized concrete batch plant is disclosed, comprising a container configured to contain a concrete batch plant to permit the transportation of the concrete batch plant. The concrete batch plant comprising one or more aggregate storage silos to receive a plurality of concrete elements. The one or more aggregate storage silos pour the concrete elements onto a conveyor based on quantity determination by a computer via a deductive scale. The conveyor transfers the concrete elements to a two-shaft mixer. An auger-fed hopper has an auger that is directly exposed to the contents inside the two-shaft mixer and transfers the contents inside the two-shaft mixer into the auger-fed hopper. A concrete pump has access to the auger-fed hopper and pumps the concrete inside the auger-fed hopper into a concrete output hose with a concrete output opening. A knuckle crane and / or hydraulic arms holds supersacks above the aggregate storage silos and the two-shaft mixer.

The invention discloses an intelligent construction equipment control method based on a multi-modal large model, and relates to the technical field of intelligent construction and construction equipment control, and the method comprises the steps: collecting concrete pumping flow, pipeline pressure, construction area point cloud and multi-angle images, obtaining a voice instruction of an operator at the same time, and carrying out the noise suppression and voiceprint recognition; inputting the trained multi-modal large model to carry out cloth coverage precision judgment, calculating a regional granularity factor, comparing the regional granularity factor with a coverage threshold value, and automatically generating a task label or triggering a voice correction strategy; a dynamic feeding stability coefficient is constructed by calculating the standard deviation of flow and pressure data, and intelligent monitoring and regulation of the running state and the construction environment of the material distributing machine are achieved in combination with a load balancing coefficient and a construction risk probability; the system also establishes a full-link tracing mechanism, realizes traceability of operation instructions, personnel identities and equipment states, ensures controllable construction quality and clear responsibility, and realizes task process optimization and continuous improvement.

The utility model relates to the technical field of building construction, and discloses a prefabricated laminated slab inter-slab abutted seam structure which comprises prefabricated slabs, the top of the right side of the prefabricated slab on the left side is fixedly connected with a plurality of through reinforcing steel bars, the outer walls of the through reinforcing steel bars are provided with locking reinforcing steel bars, and the right side of the top of each prefabricated slab is fixedly connected with a plurality of hoisting reinforcing steel bars. The top of the hoisting steel bar is fixedly connected with a steel bar sleeve, the inner wall of the steel bar sleeve is fixedly connected with a butt joint steel bar, and the edge of the right side of the top of the prefabricated slab is fixedly connected with a plurality of stabilizing steel bars. According to the utility model, the reinforcing steel bars are hoisted to fix the prefabricated slab, the through reinforcing steel bars are distributed at the abutted seams, the concrete mixed liquid is uniformly poured by using a fine aggregate concrete pump, the reinforcing steel bars and the reinforcing steel bar sleeves are locked to be inserted with the butt-joint reinforcing steel bars, the reinforcing steel bars are stabilized to increase the connection area, and the inclined plane of the prefabricated slab forms an inverted V-shaped space and is provided with tooth grooves, so that the shear strength, integrity and durability of the structure are enhanced; and requirements are met.

The invention discloses a pile foundation concrete accurate pouring control system and method based on multi-source sensing fusion. The pile foundation concrete accurate pouring control system comprises a sensing layer and a control layer, wherein the sensing layer comprises a phased array ultrasonic probe, a binocular vision sensor and a laser ranging array; the modeling layer comprises a three-dimensional hole shape reconstruction module and a BIM digital modeling engine; the data layer comprises a real-time monitoring database and a multi-source data fusion center; the decision-making layer comprises a concrete dynamic evaluation model and a BIM visual platform; the execution layer comprises a self-adaptive PID controller used for adjusting the concrete pumping rate according to the decision instruction, and a three-dimensional visualization terminal used for displaying the BIM model with the tolerance zone in real time. According to the method, a BIM model containing dynamic compensation is constructed through ultrasonic three-dimensional scanning, closed-loop control is achieved by fusing multi-source sensing data, and tolerance band penetration early warning and self-adaptive PID adjustment are combined. The hidden defect discovery rate is improved, and the comprehensive construction efficiency is improved.

The invention relates to a truck-mounted concrete pump (1) with a hydraulically driven concrete pumping device (2), a first hydraulic pump (3), a second hydraulic pump (4), the first and second hydraulic pumps (3, 4) being provided for the joint hydraulic drive of the concrete pumping device (2), and a first drive motor (5) provided for the mechanical drive of the first and second hydraulic pumps (3, 4), which are connected to one another in a drive-force-transmitting manner. The first and second hydraulic pumps (3, 4) are connected in a drive-force-transmitting manner via a coupling (7), which is provided for selectively interrupting the drive-force-transmitting connection between the first hydraulic pump (3) and the second hydraulic pump (4). In a first variant of the invention, the first and second hydraulic pumps (3, 4) form a hydraulic pump train (6), which connects them in a drive-force-transmitting manner.In a second variant, the first and second hydraulic pumps (3, 4) are connected to each other via a transfer case (30) to transmit drive force.

The embodiment of the invention provides a pumping system for a concrete pump truck, a control method and system of the pumping system and a medium. The method comprises the following steps: executing a device; the power device is connected with the execution device, and the power device is configured to drive the execution device to do telescopic motion so as to push concrete to be conveyed to a target position from a hopper; the locking device is arranged between the execution device and the power device, and the locking device is configured to be locked based on locking pressure when the pumping system is shut down or waits for materials so as to block an oil way between the power device and the execution device. According to the scheme, the problems that the main oil cylinder of the pumping system slips and the oil cylinder is driven to move due to zero drift of the closed pump can be effectively prevented.

The invention discloses a digital diaphragm wall closed-loop pouring system and construction method.The digital diaphragm wall closed-loop pouring system comprises a concrete supply device, a central integrated control machine and at least one pouring unit electrically connected with the central integrated control machine, and each pouring unit comprises a pouring mechanism, a slurry pumping mechanism and the central integrated control machine; an active pressure pouring technology is adopted, continuous and controllable extra power is provided for concrete flowing through a pressurizing mechanism such as a concrete pump or an air pressure pressurizing system, and a traditional pouring mode purely depending on concrete gravity is replaced. By means of the basic change, the concrete in the guide pipe can actively overcome larger mud static pressure and pipeline resistance, and therefore the technical problems that due to the fact that the burial depth is too large, the concrete cannot flow out smoothly, the pipe is blocked, and even a pile is broken are thoroughly solved.

The utility model discloses an anti-clogging concrete spraying device, which relates to the field of concrete spraying and comprises a bottom plate, a storage box is arranged on one side of the top end of the bottom plate, a feed opening is arranged on one side of the top end of the storage box, and a stirring mechanism is arranged in the middle of the storage box; a concrete pump is arranged in the middle of the top end of the bottom plate, a lower supporting plate is arranged on the other side of the top end of the bottom plate, an adjusting mechanism is arranged in the lower supporting plate, an upper supporting plate matched with the adjusting mechanism is arranged at the top end of the lower supporting plate, and a swing mechanism is arranged at the top end of the upper supporting plate. A guniting pipe matched with the concrete pump is arranged on one side of the bottom end of the storage box, and the guniting pipe is connected with the bottom end of the swing mechanism. Under the matching action of the stirring mechanism, the concrete pump, the adjusting mechanism and the swinging mechanism, the multi-angle concrete spraying device can complete multi-angle concrete accurate spraying, ensures the accuracy and efficiency of the guniting operation, and also has a cleaning function after the guniting operation is completed.

An infrared vision positioning method for concrete pumping liquid level in tube of steel tubular arch bridge is provided. In this method, the perspective geometry algorithm is used to construct the pose transformation matrix to obtain the relative pose between the camera and the arch bridge steel pipe, the image is transformed into orthography by perspective transformation, and the real coordinates of the liquid level in the infrared image can be directly solved by the scale, so as to realize the accurate positioning of the liquid level; the proposed method is simple in structure and can realize real-time operation, which greatly improves the calculation efficiency of coordinates in infrared images, compared with the conventional knocking method, the advantage is that it does not require staff in an overhead operating, and the feedback of the liquid level position can be faster and more efficient.

The invention discloses a tunnel integrated trolley based on a full-section drilling and blasting method and a construction method thereof. Comprising a single-side double-track chassis, multifunctional supporting legs, a door-shaped frame, a rock drilling bolting and grouting arm module, an explosive charging wet spraying arm module, an undercut danger removing operation arm module, a steel arch mounting system, a concrete pumping system, a hydraulic system, an air compression system, an additive system, a grouting stirring system, a water system, a cable reel, an intelligent electric control system, a spraying and dust reducing system and the like. Compared with traditional large machine matched construction, the tunnel construction method has the advantages that procedures are seamlessly connected, the waiting time of machines or tools is greatly shortened or zero, multi-tool transition scheduling is not needed, the number of professional operators is greatly reduced, tunnel construction efficiency is greatly improved, construction circulation time is shortened, construction cost is reduced, and construction safety is improved.

The invention relates to a truck-mounted concrete pump (1), wherein the truck-mounted concrete pump (1) comprises: a concrete pumping system (2), wherein the concrete pumping system (2) is designed to convey concrete, a hydraulic drive pumping system (3), wherein the hydraulic drive pumping system (3) is designed to drive the concrete pumping system (2) and has a hydraulic pump drive shaft (4), an electric motor (5), wherein the electric motor (5) is designed to drive the hydraulic pump drive shaft (4) of the hydraulic drive pumping system (3) and has an electric motor shaft (6), and a drive motor system (7), wherein the drive motor system (7) is designed to drive the electric motor shaft (6) in order to drive the hydraulic pump drive shaft (4) of the hydraulic drive pumping system (3) by means of the electric motor shaft (6).

The invention provides a concrete pumping state monitoring device and method based on a sound-sensitive sensor. The concrete pumping state monitoring device and method are used for solving the technical problem that concrete is blocked in the concrete pumping process of existing building construction. The monitoring device comprises a plurality of sound-sensitive sensors, a data acquisition device and a remote control platform, the sound-sensitive sensors are uniformly distributed at a plurality of key positions of the pump pipe, the sound-sensitive sensors are connected with the data acquisition device, and the data acquisition device is connected with the remote control platform. The invention further discloses a concrete pumping state monitoring method based on the sound-sensitive sensor. A plurality of data acquisition terminals are adopted to monitor the whole pump pipe, the pumping state of concrete is recognized, blockage is output according to characteristics, and blockage position information is output. Real-time monitoring and fault diagnosis can be carried out on the concrete pump pipe in the concrete pumping process, and safety and high efficiency of the pump pipe in the using process are guaranteed.

The present invention provides a pumping hydraulic system and a concrete pumping machine. The pumping hydraulic system includes two pumping cylinders connected in series, a main oil pump, a main reversing valve, and a high-low pressure switching valve. The main oil pump pumps hydraulic oil to the pumping hydraulic system through a pumping oil circuit. The main reversing valve is arranged on the pumping oil circuit and controls the telescopic movement of the pumping cylinders. The high-low pressure switching valve is arranged on the oil supply circuit of the main reversing valve. The valve core of the high-low pressure switching valve can be switched between a first working position and a second working position, so that the hydraulic oil pumped by the main oil pump enters the rod chamber or the rodless chamber of one of the pumping cylinders through the high-low pressure switching valve. In the pumping hydraulic system of the present invention, the high-pressure and low-pressure pumping states of the pumping cylinders can be realized by the cooperation of a high-low pressure switching valve and a main reversing valve, which simplifies the structure and improves the pumping efficiency.

This invention relates to a method for pile formation using a spiral soil displacement drilling casing and subsequent concrete pouring, comprising the following steps: After the spiral soil displacement pile driver is positioned, the first power head is started to rotate and drill downwards to form a hole, and then the second power head is started to drive the casing to rotate and drill downwards to form a hole, until the soil displacement drill bit and the casing of the second power head reach the designed depth and drilling stops; the connection between the second power head and the casing is disconnected, and the concrete pump connected to the first power head is started to pump concrete into the borehole while simultaneously lifting the first and second power heads upwards until the soil displacement drill bit is completely removed from the casing; the reinforcing cage is locked into the positioning component using a locking component, and then lowered along the casing to a predetermined height, while pumping concrete into the casing until the designed pile top elevation is reached; the second power head is reconnected to the casing using the locking component, and the second power head is started to rotate and lift upwards until the casing is completely removed from the soil layer, thus completing pile formation. This application facilitates the rapid and stable lowering of the reinforcing cage.

The invention relates to a series-parallel connection mixed electro-hydraulic mixing arm support system and a concrete pump truck. The arm support system comprises an arm support, a hose assembly, a tail end freedom degree assembly, a multi-freedom-degree mechanical arm and a self-adaption assembly. One end of the hose assembly is connected with a conveying pipeline on the arm support, and the other end is connected with the tail end freedom degree assembly; the self-adaptive assembly is installed on the arm frame, the multi-degree-of-freedom mechanical arm is installed on the self-adaptive assembly, the tail end joint is connected with the tail end degree-of-freedom assembly, and the self-adaptive assembly is used for monitoring the tail end posture of the arm frame and the posture of the multi-degree-of-freedom mechanical arm in real time and adjusting the posture of the multi-degree-of-freedom mechanical arm according to the monitoring result. Compared with the prior art, the mechanical arm is matched with a hydraulic arm frame parallel structure to adjust the position of the discharging port, and the beneficial effects of being high in structural strength, fast in response, high in adjusting precision and the like are achieved.

The invention relates to the related technical field of concrete pouring, in particular to a concrete pouring pump pipe with a buffering mechanism additionally arranged at the tail end and a pouring method thereof.The concrete pouring pump pipe comprises a main pipe, the starting end of the main pipe is connected with a concrete pump, and the buffering mechanism is arranged at the tail end of the main pipe; a flow dividing pipe matched with the main pipe is arranged between the two assembly arms and connected with the tail end of the main pipe through an assembly connecting structure. By arranging the two opposite and inclined discharging pipes, during pouring, after concrete enters the flow dividing pipe from the main pipe, the concrete is divided into two jet flows through a double-channel structure, the two jet flows are ejected out of the two discharging pipes and then are opposite to each other, impact force is relieved, buffering is achieved through soft collision between concrete fluid, and the concrete flow dividing effect is improved. And sharp noise generated when aggregate in concrete collides with the baffle when the buffer baffle is arranged is effectively avoided, and the working environment of nuclear power engineering construction is remarkably improved.

The utility model discloses a concrete pump truck S valve wear -resisting ring replacement subassembly, including the wear -resisting ring of the sleeve setting in the S valve body discharge pipe end part, the surface of S valve body discharge end is provided with the installation slot of wear -resisting ring sleeve setting, the inner chamber of installation slot is provided with annular groove, the surface annular array of wear -resisting ring is provided with four screw nails, the end of screw nail extends to the inner chamber of annular groove, wear -resisting ring and the end of installation slot inner chamber are provided with a plurality of limit pin, the utility model discloses the surface of installation slot is sleeved with wear -resisting ring, then adopts screwdriver to tighten screw nail, makes the steel ball on screw nail and rests in the inner wall of annular groove, wear -resisting ring can also rotate on the surface of installation slot during, after arc groove no.

The utility model discloses a concrete pumping agent batching automatic high-precision conveying device which comprises a main frame body, a horizontal plate is fixed in the middle of the main frame body, a plurality of feeding and discharging heads are arranged on a top transverse beam of the main frame body from left to right, and installation through holes corresponding to the feeding and discharging heads are formed in the horizontal plate. A plurality of connecting plates are fixed to the bottom surface of the horizontal plate, weighing sensors are fixed to the middles of the top surfaces of the connecting plates, a placing plate is fixed to the tops of the weighing sensors, the weighing sensors and the placing plate are located in the corresponding mounting through holes, and the top surface of the placing plate extends out of the top surfaces of the mounting through holes; a to-be-discharged barrel body is placed on the top surface of the corresponding placing plate and faces the corresponding charging and discharging head; the bucket body can be automatically conveyed to the position below the corresponding feeding and discharging head for material receiving, the automation degree is high, the effect is good, and the efficiency is high.

The invention discloses a detachable concrete pouring tumbling cylinder, and belongs to the technical field of building pouring, the detachable concrete pouring tumbling cylinder comprises a pouring groove, a plurality of tumbling cylinder main bodies are sequentially connected in series at the bottom of the pouring groove, the detachable concrete pouring tumbling cylinder further comprises guide cylinders connected to the bottoms of the tumbling cylinder main bodies, the cross section of each guide cylinder is conical, and each guide cylinder is of a flexible structure; the small-diameter end of the bottom of the guide cylinder is connected, and the guide taper of the guide cylinder is controlled through the aperture control mechanism. According to the concrete tumbling barrel, through the designed aperture control mechanism, when concrete is conveyed to the top of a pouring groove from a pump truck during pouring, the concrete can sequentially enter the space between the tumbling barrel body and the guide barrel, the taper of the guide barrel can be controlled to meet the guide requirements of concrete of different grades through shrinkage of the taper of the guide barrel, and falling material segregation is reduced.

This invention relates to the field of concrete construction technology, specifically disclosing an anti-clogging concrete pumping device, comprising: a feed hopper, with a temporary storage tank installed at the bottom of the feed hopper, the temporary storage tank having a mixing mechanism inside; and an interception mechanism, comprising an adjustment box, a guide groove, a moving rod, a grating plate, a flow guide frame, and a reinforcing plate, wherein two adjustment boxes, two guide grooves, and two flow guide frames are provided, and the two adjustment boxes are respectively installed on the outer walls of both sides of the feed hopper. This invention uses a driver to drive the positive and negative screws to rotate, causing the two adjustment frames to unfold, and causing several moving rods to respectively unfold several grating plates. This allows the spacing of the grating plates to be flexibly adjusted according to the actual application scenario, accurately matching diverse usage needs, thereby enhancing the interception effect of the grating plates on large sand and gravel particles in the concrete, and also enhancing the anti-clogging effect of the concrete pumping device.

The utility model provides a concrete pouring device applied to a bead-like karst cave, and particularly relates to the technical field of engineering construction. The device comprises a protective sleeve, a drill bit and a grouting pipe, a plurality of grouting assemblies are arranged on the surface of the protective sleeve according to the exploration position of the actual bead-like karst cave; two discharging through holes are symmetrically formed in the positions, corresponding to the grouting assemblies, of the surface of the protection sleeve in the diameter direction, one end of the grouting pipe is connected with a concrete pump, and the other end of the grouting pipe extends into an inner cavity of the protection sleeve and completes concrete grouting of the bead-string-shaped karst cave through the multiple discharging through holes. According to the utility model, the grouting assembly and the discharging through hole are arranged according to the exploration position of the actual bead-shaped karst cave, so that the karst caves at different positions can be filled; compared with a traditional pouring method, the problem that multiple times of punching and multiple times of casing pipe burying are needed when the bead-shaped karst cave is poured is solved, the construction cost is effectively reduced, and meanwhile the construction period is shortened.

The present invention discloses a building material detection device and a method of using the same, including a concrete pump truck, a concrete flow channel is provided on the concrete pump truck, a first guide rail is provided below the concrete flow channel, a sample box is slidably provided on the first guide rail, the sample box includes a frame, a sample cavity is provided in the frame, a sliding bottom surface is slidably provided in the sample cavity, a screw rod is provided at the lower end of the sliding bottom surface, a threaded sleeve is rotatably provided at the bottom of the frame, and the threaded sleeve is provided in cooperation with the screw rod, and the threaded sleeve can drive the screw rod to rise or fall when it rotates. The present invention provides a building material detection device, which can automatically apply a demoulding liquid to a sampling box when a concrete pump truck is pouring concrete, and automatically perform random sampling at the same time, so as to avoid missing concrete sampling due to tight construction period, and at the same time, the entire sampling process is automatically and randomly completed, so as to avoid intentional fraud, ensure the randomness of sampling, and ensure that the sample is more representative.

The present invention discloses a pump truck boom and a pump truck, which relate to the field of engineering machinery and are used to make the structure of the pump truck boom more compact and reasonable. The pump truck boom includes a first boom, a second boom and a worm gear drive mechanism. The second boom is rotatably connected to the first boom. The worm gear drive mechanism includes a worm wheel and a worm that mesh with each other, and the worm wheel includes an inner ring and an outer ring that are rotatably connected; the inner ring is fixedly connected to the first boom, and the outer ring is fixedly connected to the second boom. The pump truck boom provided by the above technical solution adopts a worm gear drive mechanism to drive the first boom and the second boom to rotate relative to each other. The worm gear drive mechanism has a reverse self-locking characteristic and can achieve mechanical self-locking, so that the first boom can be safely and reliably stopped at any position relative to the second boom. In addition, the worm gear drive mechanism has a large transmission ratio, a compact structure, and low weight; the meshing tooth surfaces of the two wheels are in line contact, and the load-bearing capacity is large.

The application discloses a material-saving and anti-splashing material distributing machine, and relates to the technical field of building construction equipment, in particular to a material-saving and anti-splashing material distributing machine. The application aims at preventing concrete splashing and collecting concrete during the pouring process of the concrete of the sandwich beam and the concrete of the first layer structure plate. A horizontal supporting arm is installed on the rotary support, a bottom support is connected to the lower end of the supporting frame for bottom support, a conveying pipe for transporting concrete is arranged at the bottom of the supporting frame through the front end of the supporting arm, a recycling groove pipe for collecting concrete is arranged on the supporting arm, the recycling groove pipe is through with the conveying pipe, and a rotating paddle for shunting concrete when the concrete pump stops is arranged at the port of the recycling groove pipe. The recycling groove pipe is added to the traditional material distributing machine for concrete recycling, and the rotating paddle is added at the conveying pipe and the recycling groove pipe to shunt the concrete flow in the conveying pipe when the pump stops, so that the concrete is guided and collected, and the concrete splashing is prevented.

The application provides a kind of concrete pump truck preferred method based on criteria removal and double normalization, it is related to building engineering technical field, the method comprises: determining several basic concrete pump truck value evaluation criteria and several concrete pump truck alternative schemes;Using the method of criteria removal effect to determine the weight of each value evaluation criterion;Using linear normalization method to normalize the data of each alternative scheme, to obtain extended linear normalization matrix;Using vector normalization method to normalize the data of each alternative scheme, to obtain extended vector normalization matrix;Based on extended linear normalization matrix, extended vector normalization matrix and the weight of each value evaluation criterion, determine the comprehensive utility value of each alternative scheme;According to the comprehensive utility value of each alternative scheme, select the concrete pump truck needed by building engineering.This scheme can improve the accuracy and reliability of the optimization of concrete pump truck.