A device for producing a multi-scale particle size distribution of underwater concrete resistant to dispersion

Abstract

The utility model discloses a kind of multi-scale particle grading ratio devices of anti-dispersion underwater concrete, the utility model relates to concrete mixing technical field.The multi-scale particle grading ratio device of anti-dispersion underwater concrete includes fixed frame, the upper portion of the fixed frame is provided with proportioning mechanism, for adjusting aggregate proportioning, the proportioning mechanism includes: sorting component, including the shell fixedly installed in the upper portion of fixed frame, one end of the shell is fixedly installed with inlet pipe, support frame is embeddedly installed in the inside of the shell, the outside of the support frame is embeddedly installed with sieve plate, sieve plate pushes material to guide vane, guide vane will follow spiral trajectory and guide material, wherein small granular material meeting granularity requirement, under the further guidance of baffle inside shell, accurate fall into the receiving hopper below;And large granular material unable to pass through sieve plate, then be guided to the gap of end cap by guide vane, directly fall into discharge chute and discharge, without manual cleaning.

Description

Technical Field

[0001] This utility model relates to the field of concrete mixing technology, specifically to a multi-scale particle size distribution device for anti-dispersion underwater concrete. Background Technology

[0002] In the construction of bridges, ports, wharves, and cross-sea channels, a large number of basic structures need to be constructed underwater. For example, in the case of bored pile foundations, underwater concrete is used to fill the pile holes to form a solid pile foundation. The underwater parts of dams and underwater cofferdams also require the use of underwater concrete. High-quality underwater concrete can be stably formed underwater, reducing construction defects and improving structural strength and durability. When mixing this type of concrete, the particle size distribution needs to be precisely controlled to ensure that the various properties of the concrete meet the standards.

[0003] The existing Chinese utility model patent with publication number CN214123335U discloses a multi-stage screening device for concrete aggregates, relating to the field of concrete screening. It includes a box installed on a horizontal surface, with an inlet and an exhaust port on the upper side and an outlet on the lower side wall. The box contains a multi-stage screening assembly for multiple screenings of the aggregates. This assembly includes an upper screen plate and a lower screen plate, mounted vertically from top to bottom within the box. The aperture of the upper screen plate is larger than that of the lower screen plate. Upper and lower outlets are respectively located on the side wall of the box corresponding to the upper and lower screen plates. An exhaust pipe is connected to the box via the exhaust port, and an exhaust fan is connected to the exhaust fan. A dust removal assembly is connected to the side of the exhaust fan away from the exhaust pipe. During the screening process, the exhaust pipe and exhaust fan work together to remove dust and send it into the dust removal assembly. This application enables dust removal during the screening process.

[0004] The aforementioned multi-stage air separation device for aggregates uses a screen plate to screen the aggregates. After screening, manual weighing and proportioning according to grading requirements is still required, which is very inconvenient. At the same time, materials that cannot pass through the screen plate will remain on top of the screen plate, affecting the screen plate's throughput over a long period of time. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a multi-scale particle size distribution device for anti-dispersion underwater concrete, which solves the problems of inability to discharge materials in a timely manner and inability to proportion materials according to requirements.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A multi-scale particle size distribution device for anti-dispersion underwater concrete includes a fixed frame, and a proportioning mechanism is provided above the fixed frame for adjusting the aggregate proportion. The proportioning mechanism includes: The sorting assembly includes a housing fixedly mounted above a fixed frame. A feed pipe is fixedly mounted at one end of the housing. A support frame is fitted inside the housing. A screen plate is fitted outside the support frame. A transmission belt is sleeved on one end of the support frame. A drive motor is fixedly mounted on one side of the housing. A drive disc is fixedly mounted on the outside of the shaft of the drive motor. An end cover is fixedly mounted at the front end of the housing. A guide plate is fixedly mounted on one side of the end cover. A receiving hopper is fixedly mounted at the bottom of the housing. A discharge chute is fixedly mounted at the front end of the housing. A mixing component, located below the sorting component, is used to limit the feed rate of aggregates of each particle size.

[0007] Preferably, the mixing component includes a limiting frame disposed below the sorting component, a pressure sensor fixedly installed above the limiting frame, a support plate fixedly installed above the pressure sensor, a limiting tube fixedly installed inside the support plate, a material blocking tube fixedly installed at the bottom end of the limiting tube, electric push rods fixedly installed on both sides of the material blocking tube, a partition fixedly installed at the movable end of the electric push rod, a connecting pipe fixedly installed below the material blocking tube, a mixing tube fixedly installed below the connecting pipe, an auger movably installed inside the mixing tube, and a mixing motor fixedly installed at one end of the mixing tube.

[0008] Preferably, the shell has a baffle structure inside, and the spacing between the baffles inside the shell matches the length of the sieve plate. The sieve plate is divided into three groups and installed on the front and rear sides of the support frame and the center of the support frame respectively, and the diameter of the sieve holes of the sieve plate increases step by step from back to front.

[0009] Preferably, the support frame and the outer shell are rotatably connected, the rear end of the support frame is fitted with the bottom end of the feed pipe, the support frame and the feed pipe are rotatably connected, the end cap is cylindrical, and the outer side is provided with a notch located directly above the discharge trough.

[0010] Preferably, the pressure sensor is fixedly installed at the four corners of the bottom surface of the support plate, the limiting tube is installed above the limiting frame through the support plate, the limiting tube and the limiting frame are slidably connected, and the partition and the material blocking tube are slidably connected.

[0011] Preferably, the connecting pipe is made of canvas, and the mixing pipe has three branch structures on its upper part, which are fixedly connected to the bottom end of the corresponding connecting pipe. The auger and the mixing pipe are rotatably connected, and the front end of the auger is fixedly connected to the shaft of the mixing motor.

[0012] Beneficial effects This invention provides a multi-scale particle size distribution device for anti-dispersion underwater concrete. Compared with the prior art, it has the following advantages: (1) In the screening stage, the drive motor drives the support frame to rotate through the drive disc and transmission belt. The screen plate is embedded on the outside of the support frame and rotates synchronously with the support frame. This can prevent the material from accumulating on the surface due to the screen plate being stationary. At the same time, the rotating screen plate can also generate a certain centrifugal force to help the material move outward. Meanwhile, the spiral guide plate fixed on the end cover cooperates with the rotating screen plate: after the screen plate pushes the material to the guide plate, the guide plate will guide the material along the spiral trajectory. The small particles that meet the particle size requirements will fall accurately into the receiving hopper below under the further guidance of the baffle inside the shell. The large particles that cannot pass through the screen plate will be guided by the guide plate to the notch of the end cover and fall directly into the discharge chute for discharge without manual cleaning.

[0013] (2) The multi-scale particle size distribution device for anti-dispersion underwater concrete uses pressure sensors. The pressure sensors are fixed at the four corners of the bottom surface of the support plate, while the limiting tube is rigidly connected to the support plate and the limiting tube is slidably connected to the limiting frame. This allows the pressure sensors to accurately monitor the weight of the material in the limiting tube, avoiding weighing errors caused by the support structure. After the material is graded, the electric push rod will drive the partition to slide in the material blocking tube. By adjusting the overlapping area of ​​the partition and the material blocking tube, the size of the feeding channel is changed. After the weight is reduced to the standard weight, the channel is closed to stop feeding, thus achieving precise control of the amount of single-size material. The multi-branch structure above the mixing tube can be connected to the connecting tubes of different particle sizes, allowing each particle size to enter the mixing tube synchronously according to the preset weight ratio, and finally discharged by the auger, meeting the particle size distribution requirements of different anti-dispersion underwater concrete. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the guide plate installation structure of this utility model; Figure 3 This is a schematic diagram of the pressure sensor mounting structure of this utility model; Figure 4 This is a schematic diagram of the auger installation structure of this utility model; In the diagram: 1. Fixed frame; 2. Proportioning mechanism; 21. Sorting component; 211. Outer shell; 212. Feed pipe; 213. Support frame; 214. Screen plate; 215. Transmission belt; 216. Drive motor; 217. Drive disc; 218. End cover; 219. Guide plate; 2110. Receiving hopper; 2111. Discharge chute; 22. Mixing component; 221. Limiting frame; 222. Pressure sensor; 223. Support plate; 224. Limiting tube; 225. Material blocking tube; 226. Electric push rod; 227. Partition plate; 228. Connecting pipe; 229. Mixing tube; 2210. Screwdriver; 2211. Mixing motor. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-4 This utility model provides a technical solution: a multi-scale particle size distribution device for anti-dispersion underwater concrete includes a fixed frame 1, and a distribution mechanism 2 is arranged above the fixed frame 1 for adjusting the aggregate ratio. The distribution mechanism 2 includes: a sorting component 21, including a shell 211 fixedly installed above the fixed frame 1, an inlet pipe 212 fixedly installed at one end of the shell 211, a support frame 213 fitted inside the shell 211, a screen plate 214 fitted outside the support frame 213, a transmission belt 215 sleeved at one end of the support frame 213, a drive motor 216 fixedly installed on one side of the shell 211, a drive disc 217 fixedly installed on the outside of the shaft of the drive motor 216, and an end cap 218 fixedly installed at the front end of the shell 211. A guide plate 219 is fixedly installed on one side of the housing 211. A receiving hopper 2110 is fixedly installed below the housing 211. A discharge trough 2111 is fixedly installed at the front end of the housing 211. A baffle structure is provided inside the housing 211, and the spacing between the baffles inside the housing 211 matches the length of the screen plate 214. The screen plate 214 is divided into three groups and is installed on the front and rear sides of the support frame 213 and the center of the support frame 213 respectively. The screen hole diameter of the screen plate 214 increases stepwise from back to front. The support frame 213 and the housing 211 are rotatably connected. The rear end of the support frame 213 is fitted into the bottom end of the feed pipe 212. The support frame 213 and the feed pipe 212 are rotatably connected. The end cap 218 is cylindrical, and a notch is provided on the outer side directly above the discharge trough 2111.

[0017] Specifically, the outer shell 211 is supported by the fixed frame 1. A support structure fixedly connected to the outer shell 211 is provided on the outside of the feed pipe 212, restricting the relative position between the feed pipe 212 and the outer shell 211. Material can enter the support frame 213 through the feed pipe 212. Since the support frame 213 and the outer shell 211 are rotatably connected, the drive motor 216 can drive the support frame 213 to rotate through the transmission belt 215 and the drive disc 217. The screen plate 214 fixedly installed on the surface of the support frame 213 has progressively increasing screen apertures, enabling material screening. The particle size increases progressively, and the material passing through the screen plate 214... The material can fall into the receiving hopper 2110 under the guidance of the outer shell 211 and the baffle structure inside the outer shell 211. The guide plate 219 is spiral in shape, and its front end is fixedly connected to the outer shell 211 through the end cover 218. When the support frame 213 drives the screen plate 214 to rotate, the material can move forward under the guidance of the guide plate 219. The material is screened by three sets of screen plates 214 with different apertures. The material that cannot pass through the screen holes of the last set of screen plates 214 will fall into the discharge trough 2111 through the gap on the outer surface of the end cover 218 under the guidance of the guide plate 219, and be discharged under the guidance of the discharge trough 2111.

[0018] A mixing component 22, positioned below the sorting component 21, limits the feed rate of aggregates of various particle sizes. The mixing component 22 includes a limiting frame 221 positioned below the sorting component 21. A pressure sensor 222 is fixedly mounted above the limiting frame 221. A support plate 223 is fixedly mounted above the pressure sensor 222. A limiting tube 224 is fixedly mounted inside the support plate 223. A material blocking tube 225 is fixedly mounted at the bottom end of the limiting tube 224. Electric push rods 226 are fixedly mounted on both sides of the material blocking tube 225. A partition 227 is fixedly mounted at the movable end of the electric push rods 226. A connecting tube 228 is fixedly mounted below the material blocking tube 225. A mixing tube 229 is fixedly mounted below the connecting tube 228. An auger 2210 is movably installed inside the mixing pipe 229. A mixing motor 2211 is fixedly installed at one end of the mixing pipe 229. Pressure sensors 222 are fixedly installed at the four corners of the bottom surface of the support plate 223. A limiting pipe 224 is installed above the limiting frame 221 through the support plate 223. The limiting pipe 224 and the limiting frame 221 are slidably connected. The partition 227 and the material blocking pipe 225 are slidably connected. The connecting pipe 228 is made of canvas. Three branch structures are provided above the mixing pipe 229, which are fixedly connected to the bottom end of the corresponding connecting pipe 228. The auger 2210 and the mixing pipe 229 are rotatably connected. The front end of the auger 2210 is fixedly connected to the shaft of the mixing motor 2211.

[0019] Specifically, the limiting frame 221 can restrict the position of the pressure sensor 222. The pressure sensor 222 can monitor the weight of the parts rigidly connected to the support plate 223 and the material inside the limiting tube 224. The top of the limiting tube 224 does not contact the bottom of the receiving hopper 2110. The material blocking tube 225 can restrict the position of the partition 227. The electric push rod 226 drives the partition 227 to slide inside the material blocking tube 225. The feeding speed is adjusted by controlling the overlapping area between the partition 227 and the material blocking tube 225. When fully overlapped, the material is prevented from falling. The connecting pipe 228 enables a soft connection between the material blocking pipe 225 and the mixing pipe 229, preventing the mixing pipe 229 from supporting the upper limiting pipe 224 and affecting the weighing accuracy. The mixing motor 2211 drives the auger 2210 to rotate, thereby discharging the material inside the mixing pipe 229 and preventing the material from accumulating at the connection between the mixing pipe 229 and the connecting pipe 228, which would affect the weighing result. At the same time, all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0020] During operation, the fixed frame 1 provides support and fixation for the entire device. Material first enters the sieve plate area of ​​the support frame 213 inside the outer casing 211 through the feed pipe 212. Then, the drive motor 216 on one side of the outer casing 211 drives the support frame 213 to rotate via the drive disc 217 on the outer side of the shaft and the transmission belt 215. The three sets of sieve plates 214, fitted and installed on the outer side of the support frame 213, rotate synchronously with the support frame 213, performing multi-scale screening of the material. The baffle structure inside the outer casing 211 guides the material passing through the sieve plates 214 down to the receiving hopper 2110 below the outer casing 211. Material that cannot pass through the last set of sieve plates 214 is guided by the spiral guide plate 219 on one side of the end cover 218 and falls into the discharge hopper 2111 through the notch located directly above the discharge hopper 2111 on the outer side of the end cover 218. Material in the receiving hopper 2110 enters the lower limiting pipe 224 under gravity. The pressure sensor 222 fixed above the limiting frame 221... The total weight of the support plate 223, the limiting tube 224, and the internal materials is monitored in real time. After material grading is completed, the electric push rods 226 on both sides of the blocking tube 225 drive the partition 227 to slide, adjusting the size of the feeding channel of the blocking tube 225. This controls the material to enter the mixing tube 229 through the canvas connecting tube 228. At this time, the monitoring data of the pressure sensor 222 will change. Based on the monitoring data of the pressure sensor 222, the closing timing of the partition 227 is controlled to accurately control the feeding amount and achieve precise proportioning. At the same time as the partition 227 opens, the mixing motor 2211 at one end of the mixing tube 229 starts, driving the auger 2210 inside to rotate, mixing and conveying materials of different particle sizes, completing the entire multi-scale particle size proportioning process.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-scale particle size distribution device for anti-dispersion underwater concrete, comprising a fixing frame (1), characterized in that: A proportioning mechanism (2) is provided above the fixing frame (1) for adjusting the aggregate proportion. The proportioning mechanism (2) includes: The sorting assembly (21) includes a housing (211) fixedly installed above the fixed frame (1). A feed pipe (212) is fixedly installed at one end of the housing (211). A support frame (213) is fitted inside the housing (211). A screen plate (214) is fitted outside the support frame (213). A transmission belt (215) is sleeved at one end of the support frame (213). A drive motor (216) is fixedly installed on one side of the housing (211). A drive disc (217) is fixedly installed on the outside of the shaft of the drive motor (216). An end cover (218) is fixedly installed at the front end of the housing (211). A guide plate (219) is fixedly installed on one side of the end cover (218). A receiving hopper (2110) is fixedly installed below the housing (211). A discharge chute (2111) is fixedly installed at the front end of the housing (211). A mixing component (22) is positioned below the sorting component (21) to limit the amount of aggregate of each size.

2. The multi-scale particle size distribution device for anti-dispersion underwater concrete according to claim 1, characterized in that: The mixing component (22) includes a limiting frame (221) disposed below the sorting component (21). A pressure sensor (222) is fixedly installed above the limiting frame (221). A support plate (223) is fixedly installed above the pressure sensor (222). A limiting tube (224) is fixedly installed inside the support plate (223). A material blocking tube (225) is fixedly installed at the bottom end of the limiting tube (224). Electric push rods (226) are fixedly installed on both sides of the material blocking tube (225). A partition plate (227) is fixedly installed at the movable end of the electric push rod (226). A connecting tube (228) is fixedly installed below the material blocking tube (225). A mixing tube (229) is fixedly installed below the connecting tube (228). An auger (2210) is movably installed inside the mixing tube (229). A mixing motor (2211) is fixedly installed at one end of the mixing tube (229).

3. The multi-scale particle size distribution device for anti-dispersion underwater concrete according to claim 1, characterized in that: The shell (211) is provided with a baffle structure inside, and the spacing between the baffles inside the shell (211) matches the length of the sieve plate (214). The sieve plate (214) is divided into three groups and installed on the front and rear sides of the support frame (213) and the center of the support frame (213) respectively. The sieve hole diameter of the sieve plate (214) increases step by step from back to front.

4. The multi-scale particle size distribution device for anti-dispersion underwater concrete according to claim 1, characterized in that: The support frame (213) and the outer shell (211) are rotatably connected. The rear end of the support frame (213) is fitted with the bottom end of the feed pipe (212). The support frame (213) and the feed pipe (212) are rotatably connected. The end cap (218) is cylindrical and has a notch on its outer side located directly above the discharge trough (2111).

5. The multi-scale particle size distribution device for anti-dispersion underwater concrete according to claim 2, characterized in that: The pressure sensor (222) is fixedly installed at the four corners of the bottom surface of the support plate (223). The limiting tube (224) is installed above the limiting frame (221) through the support plate (223). The limiting tube (224) and the limiting frame (221) are connected in a sliding manner. The partition plate (227) and the material blocking tube (225) are connected in a sliding manner.

6. The multi-scale particle size distribution device for anti-dispersion underwater concrete according to claim 2, characterized in that: The connecting pipe (228) is made of canvas. The mixing pipe (229) has three branch structures on its upper part, which are fixedly connected to the bottom end of the corresponding connecting pipe (228). The auger (2210) and the mixing pipe (229) are rotatably connected. The front end of the auger (2210) is fixedly connected to the shaft of the mixing motor (2211).

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