Dry-mixed mortar production device capable of adjusting dry sand gradation

Abstract

The invention discloses a dry-mixed mortar production device capable of adjusting dry sand gradation, and relates to the technical field of dry-mixed mortar conveying production.The dry-mixed mortar production device comprises a grading box, a conveying belt, a material distributing bin, a material conveying pipe and a material mixing barrel, a connecting block is embedded in the material mixing barrel, an annular pipe is connected to the outer wall of the connecting block, and a spherical head is installed at the bottom of the annular pipe; the outer wall of the spherical head is slidably connected with a spherical head pipeline, and the bottom end of the arc-shaped rod is connected with the outer wall of the spherical head pipeline. By arranging the annular pipe, the spherical head and the spherical head pipeline, aggregate is fed into the mixing barrel in a circular feeding mode, the phenomenon that all levels of aggregate are fed along the same site all the time is avoided, an air pump outputs or pumps out air into a fixed pipe, an arc-shaped rod drives the spherical head pipeline to rotate inwards or outwards, and the aggregate is fed into the mixing barrel. And the position of the opening in the bottom end of the ball head pipeline is adjusted, so that aggregate is conveniently and uniformly fed into each position in the mixing barrel, the feeding effect is favorably improved, and the uniform mixing efficiency and effect of the dry-mixed mortar are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dry-mixed mortar conveying and production, and specifically provides a dry-mixed mortar production device with adjustable dry sand gradation. Background Art

[0002] Dry-mixed mortar refers to a granular or powdery material that is obtained by putting aggregate, inorganic binder, additive substances, etc. into a dry-mixed mortar production device in a certain proportion and then physically mixing them in the production device. It is transported to the construction site in the form of bags or bulk, and can be directly used after adding water and mixing. When the existing dry-mixed mortar is produced, since the feeding port is fixedly arranged on the production device, the aggregate and other raw materials input along the feeding port are often placed at fixed positions in the production mixing device, resulting in poor mixing effect of the dry-mixed mortar, long stirring and mixing time, and reduced production efficiency and effect of the dry-mixed mortar.

[0003] The defects of the existing dry-mixed mortar production devices are as follows: In the patent document CN213674827U, mainly by setting multiple sand bins to adjust the quality of dry sand, and then improving the quality of dry-mixed mortar. However, the above patent does not consider the problems of long mixing time and poor mixing effect caused by the fixed feeding point. In the patent document CN117021341A, mainly considers how to avoid the problem of local agglomeration of the transported materials during the production of dry-mixed mortar. However, the above patent does not consider how to control the uniformity of raw material feeding. In the patent document CN217494704U, mainly by setting a stirring device to improve the mixing efficiency of dry-mixed mortar, without considering how to adjust the proportion of aggregates with different particle size ranges in the original aggregate to meet the production requirements of dry-mixed mortar. In the patent document CN214394777U, mainly considers how to reduce the loss of raw materials, without considering how to improve the filtering effect and crushing effect. Summary of the Invention

[0004] The purpose of the present invention is to provide a dry-mixed mortar production device with adjustable dry sand gradation to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A dry-mixed mortar production device with adjustable dry sand gradation, including a grading box, a conveyor belt, a distributing bin, a conveying pipe, and a mixing cylinder. The conveyor belt is used to transport the aggregate output from the grading box to the distributing bin. A conveying pipe is installed at the bottom of the distributing bin, and the conveying pipe penetrates through the top of the mixing cylinder. A connecting block is embedded and installed inside the mixing cylinder. On the outer walls of the connecting blocks facing away from each other, a first gear is connected. A first rotating motor is installed on the top of the mixing cylinder. A second gear is sleeved on the outer wall of the output end of the first rotating motor, and the second gear meshes with the first gear. On the outer walls of the connecting blocks facing each other, an annular pipe is connected. The bottom end of the material conveying pipe penetrates through the top of the annular pipe. A spherical head is installed at the bottom of the annular pipe. A discharge port is opened at the bottom of the spherical head. A ball head pipe is slidably connected to the outer wall of the spherical head. A fixed pipe is embedded and installed at the bottom of the connecting block. The bottom end of the fixed pipe penetrates and is connected to a curved rod, and the bottom end of the curved rod is connected to the outer wall of the ball head pipe. An air pump is arranged inside the connecting block, and the air pump is connected to the fixed pipe through a connecting pipe.

[0006] Preferably, an inner bowl frame is slidably connected to the inner wall of the spherical head. A discharge hole is penetrated and opened at the bottom of the inner bowl frame. A connecting rod is installed at the bottom of the inner bowl frame, on both sides of the discharge hole, and the bottom end of the connecting rod is connected to the inner wall of the ball head pipe.

[0007] Preferably, a top through groove is opened at the top of the annular pipe, and the material conveying pipe is inserted into the top through groove. The top of the curved rod is slidably connected to the inner wall of the fixed pipe.

[0008] Preferably, a second rotating motor is installed on the top of the mixing cylinder. The output end of the second rotating motor is connected to a mixing rod, and the mixing rod is located inside the mixing cylinder. The material conveying pipe is located outside the second rotating motor.

[0009] Preferably, the area of the discharge hole is smaller than the area of the discharge port, and the connecting rod is located inside the discharge port.

[0010] Preferably, a grading screen is installed inside the grading box, and the grading screen is used for grading the aggregate entering the grading box.

[0011] Preferably, buffer boxes are respectively installed on the side and the front of the grading box. Feed through grooves are penetrated and opened on the outer wall of the grading box, and the feed through grooves are located above the grading screen. There are feed through grooves corresponding to the position on the outer wall of the grading box. A weighing bottom plate is installed inside the buffer box. A weighing sensor is embedded and installed on the bottom wall of the buffer box, and the weighing bottom plate is located above the weighing sensor. Discharge through grooves are penetrated and opened on the outer wall of the grading box. Fixed through grooves are penetrated at the relative positions of the buffer boxes. The fixed through grooves and the discharge through grooves are located below the feed through grooves. A partition screening plate is slidably connected to the inner wall of the fixed through groove. An installation groove is opened on the inner wall of the grading box. A telescopic rod is installed on the inner wall of the installation groove. A sealing plate is installed at the output end of the telescopic rod, and the sealing plate is used for sealing the discharge through groove.

[0012] Preferably, the buffer box is in a "convex" shape. A lifting plate is slidably connected to the inner wall of the buffer box. Convex blocks are arranged on both sides of the lifting plate, and the convex blocks penetrate through the inner wall of the buffer box and extend to the outside of the buffer box. A rotating motor three is installed on the top of the lifting plate, and the output end of the rotating motor three is connected with a crushing cutter head. A servo motor one is installed on the top of the buffer box, and the output end of the servo motor one is connected with a lead screw, and the convex block is sleeved on the outer wall of the lead screw.

[0013] Preferably, a spring is installed on the inner wall of the fixed through groove, and the springs are symmetrically arranged with respect to the discharge through groove. A baffle is installed on the outer wall of the separation screen, and the baffle is located inside the spring. A servo motor two is installed on the outer wall of the buffer box, and the output end of the servo motor two is connected with a rotating rod. A frame plate is installed on the outer wall of the rotating rod, and the frame plate is located between the dispersing cutter head and the separation screen.

[0014] Preferably, the conveyor belt is located between the grading box and the powder bin. The number of groups of the conveyor belts is three, and the right ends of the upper two groups of conveyor belts are located below the buffer box.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By installing an annular pipe, a spherical head and a ball head pipe, the aggregate is put into the mixing cylinder from the annular pipe. The rotating motor one drives the gear one to rotate, and through the gear two and the connecting block, the annular pipe rotates, and the aggregate is put into the mixing cylinder in a circular feeding manner, avoiding the phenomenon that the aggregates of each level are always put in along the same position point, which is beneficial to improving the feeding effect, and then facilitating the uniform mixing of the aggregates of each level. By outputting or pumping out gas into the fixed pipe by the air pump, the arc-shaped rod is driven to push the ball head pipe to rotate inwards or pull the ball head pipe to rotate outwards, so as to adjust the position of the bottom opening of the ball head pipe, which is convenient for putting the aggregate into various positions inside the mixing cylinder, and is beneficial to further improving the mixing efficiency and effect of the dry-mixed mortar.

[0016] 2. By installing an inner bowl frame, a discharge hole and a connecting rod, when the ball head pipe adjusts the feeding position, the size of the aperture for outputting the aggregate from the spherical head to the spherical pipe remains unchanged, which is beneficial to improving the feeding uniformity during the feeding process, avoiding the phenomenon of excessive or insufficient feeding at different positions of the discharge, and thus being beneficial to improving the quality of the dry-mixed mortar finished product.

[0017] 3. By installing a buffer box, the dry sand aggregates with different particle sizes are stored separately. The setting of the weighing bottom plate and the weighing sensor is convenient for obtaining the proportion of the aggregates in different particle size ranges in the original aggregates, and then it is convenient to select the aggregates with a larger proportion of particle size for crushing treatment again, so as to adjust the proportion of the aggregates in different particle size ranges, so that the amounts of the aggregates in different particle size ranges can meet the production requirements of the dry-mixed mortar. The distribution bin and the conveying pipe are used to store and convey the aggregates in different particle size ranges separately, which is convenient for selecting which particle size of the aggregates to be put and the amount of the put, and improves the adjustment ability of the dry sand gradation.

[0018] 4. The present invention is equipped with a partition screen and a support plate. The partition screen is used to screen the crushed aggregate again. During the screening process, the support plate is driven by the second servo motor to rotate slightly left and right, intermittently squeezing the partition screen plate. Under the combined action of the spring, the partition screen plate moves back and forth, thereby pushing the aggregate on the front of the partition screen plate to shake, improving the screening effect. By rotating the support plate significantly left and right, the aggregate accumulated on the front of the partition screen plate is scraped and thrown towards the crushing cutter head for further crushing, which is beneficial to improving the crushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the structure of the mixing cylinder of the present invention; Figure 3 is a schematic diagram of the structure of the spherical head of the present invention; Figure 4 is a schematic diagram of the structure of the annular pipe of the present invention; Figure 5 is a schematic diagram of the vertical structure of the spherical head pipe of the present invention; Figure 6 is a schematic diagram of the inclined structure of the spherical head pipe of the present invention; Figure 7 is a schematic diagram of the structure of the classification box of the present invention; Figure 8 is a schematic diagram of the structure of the buffer box of the present invention; Figure 9 is a schematic diagram of the structure of the support plate of the present invention.

[0020] In the figure: 1, classification box; 2, conveyor belt; 3, distribution bin; 4, delivery pipe; 5, mixing cylinder; 6, connecting block; 7, first gear; 8, first rotating motor; 9, second gear; 10, annular pipe; 11, spherical head; 12, discharge port; 13, spherical head pipe; 14, fixed pipe; 15, arc rod; 16, air pump; 17, inner bowl frame; 18, discharge hole; 19, connecting rod; 20, second rotating motor; 21, mixing rod; 22, classification screen; 23, buffer box; 24, feed through groove; 25, weighing bottom plate; 26, weighing sensor; 27, discharge through groove; 28, fixed through groove; 29, sealing plate; 30, telescopic rod; 31, partition screen; 32, lifting plate; 33, third rotating motor; 34, crushing cutter head; 35, first servo motor; 36, lead screw; 37, spring; 38, baffle; 39, second servo motor; 40, rotating rod; 41, support plate. DETAILED DESCRIPTION OF THE INVENTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown in the figure, an embodiment provided by the present invention is a dry-mixed mortar production device capable of adjusting the dry sand gradation, including a grading box 1, a conveyor belt 2, a distribution bin 3, a feeding pipe 4, and a mixing drum 5. The conveyor belt 2 is used to convey the aggregate output from the grading box 1 to the distribution bin 3. A partition plate is arranged in the distribution bin 3. By setting the partition plate, the space in the distribution bin 3 is divided into independent spaces for storing aggregates of different particle sizes. A long-diameter pipe is arranged at the top of each group of independent spaces. The long-diameter pipe is used to receive aggregates of different particle sizes transported on different conveyor belts 2 and put the aggregates into the independent space of the distribution bin 3. The bottom of the distribution bin 3 is installed with a feeding pipe 4, and the feeding pipe 4 corresponds to the independent space, so that each group of independent spaces has an independent feeding pipe 4, and a control valve is arranged on the feeding pipe 4. The feeding pipe 4 passes through the top of the mixing drum 5 and extends into the mixing drum 5. Inside the mixing cylinder 5, a connecting block 6 is embedded and installed. The connecting blocks 6 are distributed in an equidistant array inside the mixing cylinder 5. On the outer walls of the connecting blocks 6 on the sides away from each other, a first gear 7 is connected. At the top of the mixing cylinder 5, a first rotating motor 8 is installed. A second gear 9 is sleeved on the outer wall of the output end of the first rotating motor 8. The second gear 9 is embedded in the outer wall of the mixing cylinder 5, and the second gear 9 meshes with the first gear 7. On the outer walls of the connecting blocks 6 on the sides close to each other, an annular pipe 10 is connected. At the top of the annular pipe 10, a top through groove is opened, and the feeding pipe 4 passes through the inside of the top through groove, so that the bottom end of the feeding pipe 4 is inserted into the annular pipe 10. At the bottom of the annular pipe 10, a spherical head 11 is installed, and the connection between the spherical head 11 and the annular pipe 10 is in a through shape. The number of installed spherical heads 11 is several groups, and several groups of spherical heads 11 are equidistantly distributed at the bottom of the annular pipe 10. At the bottom of the spherical head 11, a discharge port 12 is opened. A ball head pipe 13 is slidably connected to the outer wall of the spherical head 11. The discharge port 12 is located inside the ball head pipe 13. At the bottom of the connecting block 6, a fixed pipe 14 is embedded and installed, and the fixed pipe 14 is an arc-shaped pipe. At the bottom end of the fixed pipe 14, an arc-shaped rod 15 is connected through. The bottom end of the arc-shaped rod 15 is connected to the outer wall of the ball head pipe 13. The top end of the arc-shaped rod 15 is in contact with and slidably connected to the inside of the fixed pipe 14. Inside the wall of the connecting block 6, an air pump 16 is provided, and the air pump 16 is connected to the fixed pipe 14 through a connecting pipe. The air pump 16 is used to input gas into the fixed pipe 14 and extract gas from the fixed pipe 14; Further, the classified aggregate is transported from the classification bin to the inside of the annular pipe 10 through a plastic pipe. Through the interconnected spherical head 11 and ball head pipe 13, the aggregate in the annular pipe 10 is put into the mixing cylinder 5. The first rotating motor 8 drives the second gear 9 to rotate. The second gear 9 meshes with the first gear 7, and then drives the first gear 7 to rotate. Thus, the annular pipe 10 is driven to rotate through the connecting block 6 arranged inside the first gear 7, so that the annular pipe 10 drives the spherical head 11 and the ball head pipe 13 to move, and the aggregate is put into the mixing cylinder 5 in a circular feeding manner, avoiding the phenomenon that each level of aggregate is always put in along the same position point, which is beneficial to improving the feeding effect, and then facilitating the uniform mixing of each level of aggregate. The air pump 16 inputs gas into the fixed pipe 14, and uses the gas to push the arc-shaped rod 15 to rotate inward, so that the overlapping length of the arc-shaped rod 15 and the fixed pipe 14 is reduced. Then, the arc-shaped rod 15 is used to push the ball head pipe 13 to incline inward, facilitating the feeding of the aggregate into the inner circle of the mixing cylinder 5. On the contrary, the gas in the fixed pipe 14 is extracted through the air pump 16, so that a negative pressure trend appears in the fixed pipe 14, pulling the arc-shaped rod 15 to slide upward along the inner wall of the fixed pipe 14, so that the arc-shaped rod 15 pulls the ball head pipe 13 to incline outward, facilitating the feeding of the fixed to the outer circle of the mixing cylinder 5. By setting the ball head pipe 13 with adjustable feeding position, it is convenient to feed the aggregate to various positions inside the mixing cylinder 5, which is beneficial to further improving the mixing efficiency and effect of the dry-mixed mortar.

[0025] Please refer to Figure 5 andFigure 6 An embodiment provided by the present invention: A dry-mixed mortar production device capable of adjusting the dry sand gradation. The inner wall of the spherical head 11 is slidably connected with an inner bowl frame 17. The top of the inner bowl frame 17 is open, and the outer wall of the inner bowl frame 17 fits with the inside of the spherical head 11. A discharge hole 18 is formed through the bottom of the inner bowl frame 17. The area of the discharge hole 18 is smaller than the area of the discharge port 12. A connecting rod 19 is installed at the bottom of the inner bowl frame 17. The connecting rod 19 is located on both sides of the discharge hole 18 and is located inside the discharge port 12. The bottom end of the connecting rod 19 is connected to the inner wall of the ball head pipe 13; Furthermore, by setting the inner bowl frame 17, the aggregate in the annular pipe 10 falls into the inner bowl frame 17 and is discharged from the discharge hole 18 at the bottom of the inner bowl frame 17 into the ball head pipe 13, and then is put into the mixing cylinder 5 from the ball head pipe 13. When the ball head pipe 13 rotates along the outer wall of the spherical head 11, the inner bowl frame 17 is driven to rotate along the spherical inner wall through the connecting rod 19, thereby adjusting the position of the discharge hole 18. Through the setting of the inner bowl frame 17 and the discharge hole 18, when the ball head pipe 13 adjusts the feeding position, the size of the aperture for outputting the aggregate from the spherical head 11 to the spherical pipe remains unchanged, which is beneficial to improving the feeding uniformity during the feeding process, avoiding the phenomenon of too much or too little feeding at different positions of the discharge, and thus is beneficial to improving the quality of the dry-mixed mortar finished product.

[0026] Please refer to Figure 2 An embodiment provided by the present invention: A dry-mixed mortar production device capable of adjusting the dry sand gradation. A rotating motor 8 is installed at the top of the mixing cylinder 5. The rotating motor is located at the center of the top of the mixing cylinder 5. The output end of the rotating motor 8 is connected with a mixing rod 21, and the mixing rod 21 is located inside the mixing cylinder 5. The mixing rod 21 is used for stirring and mixing the aggregate in the mixing cylinder 5. The feeding pipe 4 is located outside the rotating motor 20. A supplementary material adding pipe is arranged through the top of the mixing cylinder 5, and the top end of the supplementary material adding pipe is inserted into the annular pipe 10 along the top groove.

[0027] Furthermore, the aggregate and supplementary materials for dry-mixed mortar production are evenly put into the mixing cylinder 5 through the feeding pipe 4 and the supplementary material adding pipe, and the rotating motor 8 drives the mixing rod 21 to rotate to stir and mix the put-in aggregate and supplementary materials. The prepared dry-mixed mortar is discharged outwards through the discharge pipe at the bottom of the mixing cylinder 5.

[0028] Please refer to Figure 1 、 Figure 7 and Figure 8, an embodiment provided by the present invention: A dry-mixed mortar production device capable of adjusting the dry sand gradation, including a grading screen 22 installed inside a grading box 1. The grading screen 22 is used to grade the aggregates entering the grading box 1. The number of sets of the grading screen 22 is adjusted according to the required aggregate particle size range. For example, when the meteorite aggregates need to be divided into three types of aggregates for dry-mixed mortar production according to the particle size, the number of sets of the grading screen 22 is two sets.

[0029] Buffer boxes 23 are respectively installed on the side and the front of the grading box 1. The number of sets of the buffer boxes 23 corresponds to the number of sets of the grading screen 22. One set of buffer boxes 23 is correspondingly arranged on one side of each set of grading screens 22. A feed through groove 24 is penetrated through the outer wall of the grading box 1, and the feed through groove 24 is located above the grading screen 22. A feed through groove 24 corresponding to the position is arranged on the outer wall of the grading box 1. After the aggregates with the particle size range meeting the requirements are screened by the grading screen 22, they enter the buffer box 23 through the feed through groove 24. A weighing bottom plate 25 is installed inside the buffer box 23, and a weighing sensor 26 is embedded in the bottom wall of the buffer box 23, and the weighing bottom plate 25 is located above the weighing sensor 26. A discharge through groove 27 is penetrated through the outer wall of the grading box 1, and a fixed through groove 28 is penetrated through at the relative position of the buffer box 23. The fixed through groove 28 and the discharge through groove 27 are located below the feed through groove 24, and the fixed through groove 28 and the feed through groove 24 are located below the grading screen 22. A partition screen plate is slidably connected to the inner wall of the fixed through groove 28, and the aperture of the partition screen 31 is the same as that of a set of grading screens 22 above it. An installation groove is opened on the inner wall of the grading box 1, and a telescopic rod 30 is installed on the inner wall of the installation groove. The telescopic rod 30 is located below the fixed through groove 28, and a sealing plate 29 is installed at the output end of the telescopic rod 30. The sealing plate 29 is used to seal the discharge through groove 27; The buffer box 23 is in a "convex" shape. A lifting plate 32 is slidably connected to the inner wall of the buffer box 23. Convex blocks are arranged on both sides of the lifting plate 32, and the convex blocks penetrate through the inner wall of the buffer box 23 and extend to the outside of the buffer box 23. A rotating motor three 33 is installed at the top of the lifting plate 32, and a crushing cutter head 34 is connected to the output end of the rotating motor three 33. A servo motor one 35 is installed at the top of the buffer box 23, and a lead screw 36 is connected to the output end of the servo motor one 35, and the convex block is sleeved on the outer wall of the lead screw 36.

[0030] Further, before feeding the original aggregate into the grading box 1, first obtain the input amount of the raw aggregate. After screening the raw aggregate through the grading screen 22, aggregates in different particle size ranges enter different buffer boxes and the aggregates in the smallest particle size range remain in the grading box 1. By means of the weighing bottom plate 25 and the weighing sensor 26 arranged in the buffer box 23, obtain the weights of the aggregates in different particle size ranges, and then calculate the proportion of the aggregates in different particle size ranges in the original aggregate. When the proportion of the aggregates in a certain particle size range in the original aggregate is relatively large, first discharge a part of the aggregates in this particle size range from the buffer box 23 and transport them to the distribution bin 3 through the conveyor belt 2 below the buffer box 23. Then, rotate the servo motor 35, the servo motor 35 drives the lead screw 36 to rotate, drives the convex block and the lifting plate 32 to move downward, and the lifting plate 32 drives the rotating motor 33 and the crushing cutter head 34 to move downward into the aggregate. Drive the crushing cutter head 34 to rotate through the rotating motor 33 to crush the remaining aggregate in the buffer box 23. The telescopic rod 30 pulls the sealing plate 29 downward to expose the discharge through slot 27. The crushed aggregate is screened by the partition screen 31, so that the aggregate enters the next particle size aggregate screening area through the fixed through slot 28 and the discharge through slot 27, achieving the purpose of adjusting the proportion of the aggregates in different particle size ranges in the original aggregate, enabling the original aggregate to meet the requirements of the usage amount of aggregates with different particle sizes during the production of dry-mixed mortar. By setting the lifting plate 32 to drive the rotating motor 33 and the crushing cutter head 34 to move, when the crushing cutter head 34 is not in use, move it upward and retract it to avoid the impact of the aggregate falling into the buffer box on the crushing cutter, which is beneficial to improving the service life and crushing effect of the crushing cutter head 34. By setting the sealing plate 29 to block the discharge through slot 27, it is avoided that during the aggregate screening process, small particle size aggregates fly into the buffer box 23 of the aggregates in the upper particle size level along the discharge through slot 27 and the fixed through slot 28, which is beneficial to improving the weighing accuracy.

[0031] Please refer to Figure 8 and Figure 9 , an embodiment provided by the present invention: a dry-mixed mortar production device with adjustable dry sand gradation. A spring 37 is installed on the inner wall of the fixed through slot 28, and the spring 37 is symmetrically arranged with respect to the discharge through slot 27. A baffle 38 is installed on the outer wall of the partition screen 31, and the baffle 38 is located inside the spring 37. The baffle 38 penetrates the inner wall of the fixed through slot 28 and extends outward to penetrate the outer wall of the grading box 1. A servo motor 39 is installed on the outer wall of the buffer box 23. The output end of the servo motor 39 is connected to a rotating rod 40. A frame plate 41 is installed on the outer wall of the rotating rod 40. The frame plate 41 is in a "U" shape, and the frame plate 41 is located between the dispersing cutter head and the partition screen 31.

[0032] Further, the crushing cutter head 34 crushes large particle aggregates, and the crushed aggregates are screened by the partition screen 31. Moreover, the servo motor II 39 drives the rotating rod 40 to rotate, thereby driving the frame plate 41 to rotate. When the frame plate 41 rotates to fit with the partition screen 31, the frame plate 41 applies pressure to the grading screen 22, so that the spring 37 behind the partition screen 31 is in a compressed state. When the servo motor II 39 drives the rotating rod 40 and the frame plate 41 to rotate in the reverse direction, the frame plate 41 separates from the partition screen 31, and the spring 37 pushes the partition screen 31 to slide forward. By driving the frame plate 41 to rotate forward and backward alternately within a small range by the servo motor II 39, the partition screen 31 is in a state of reciprocating movement left and right, which is conducive to assisting the partition screen 31 in screening the crushed aggregates and improving the crushing effect. When the range of the rotation of the frame plate 41 driven by the servo motor II 39 is increased, the frame plate 41 drives the large particle aggregates accumulated on the front of the partition screen 31 to move. As the frame plate 41 rotates, the aggregates are thrown towards the crushing cutter head 34, and the large particle aggregates are broken again by the crushing cutter head 34, which is beneficial to improving the crushing effect on large particle size aggregates and achieving the purpose of adjusting the proportion of aggregates with different particle sizes in the original aggregates; Discharge outlets are provided at the bottom walls of the buffer box 23 and the bottom of the grading box 1, and the discharge outlets are located above the right end of the conveyor belt 2. The aggregates screened by the grading box 1 and the buffer box are transmitted to different independent spaces of the distribution bin 3 through different conveyor belts 2. Through the control valve on the feed pipe 4 at the bottom of the distribution bin 3, it is convenient to control which particle size range of aggregates is added to the mixing bin and the addition amount of aggregates with different particle sizes, so as to facilitate the adjustment of the dry sand gradation.

[0033] Working principle: The original aggregates are put into the grading box 1 for aggregate screening. Aggregates with different particle size ranges are placed separately, and the proportion of aggregates with different particle size ranges in the original aggregates is calculated based on the weight of the original aggregates and the weight of the aggregates in different buffer boxes. For the aggregates with a relatively large proportion, some of the aggregates are first conveyed to the corresponding placement space in the distribution bin 3 through the conveyor belt 2, and then the large-particle aggregates are crushed by the crushing cutter head 34. After crushing, the aggregates are screened again through the partition screen 31. During the screening process, the servo motor II 39 drives the support plate 41 to rotate slightly left and right, intermittently squeezing the partition screen plate. Under the combined action of the spring 37, the partition screen plate moves back and forth, thereby pushing the aggregates on the front of the partition screen plate to shake, improving the screening effect. By rotating the support plate 41 significantly left and right, the aggregates accumulated on the front of the partition screen plate are scraped towards the crushing cutter head 34 for crushing again, which is beneficial to improving the crushing effect. The graded aggregates are conveyed into the distribution bin 3 through the conveyor belt 2 for separate storage, and then conveyed into the mixing drum 5 through the conveying pipe 4. The control valve on the conveying pipe 4 is used to control the addition of aggregates with which particle size range and the amount of aggregate added. The aggregates enter the annular pipe 10 through the conveying pipe, and are put into the mixing drum 5 through the spherical head 11 and the ball head pipe 13. The arc-shaped rod 15 adjusts the angle of the ball head pipe 13, and the ball head pipe 13 drives the inner bowl frame 17 to slide, and the annular pipe drives the ball head pipe 13 to rotate, so that the aggregates are evenly put into various parts of the mixing drum 5. Then, the rotation motor I 8 drives the mixing rod 21 to rotate to mix and stir the aggregates and auxiliary materials to obtain dry-mixed mortar.

[0034] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A dry-mixed mortar production device capable of adjusting the dry sand gradation, characterized in that, It includes a grading box (1), a conveyor belt (2), a material distribution bin (3), a material conveying pipe (4) and a mixing cylinder (5). The conveyor belt (2) is used to convey the aggregate output from the grading box (1) to the material distribution bin (3). A material conveying pipe (4) is installed at the bottom of the material distribution bin (3), and the material conveying pipe (4) penetrates through the top of the mixing cylinder (5). A connecting block (6) is embedded and installed inside the mixing cylinder (5). On the outer walls of the two sides of the connecting block (6) far away from each other, a first gear (7) is connected. A first rotating motor (8) is installed on the top of the mixing cylinder (5). A second gear (9) is sleeved on the outer wall of the output end of the first rotating motor (8), and the second gear (9) meshes with the first gear (7). On the outer walls of the two sides of the connecting block (6) close to each other, a ring pipe (10) is connected. The bottom end of the material conveying pipe (4) penetrates through the top of the ring pipe (10). A spherical head (11) is installed at the bottom of the ring pipe (10). An outlet (12) is opened at the bottom of the spherical head (11). A ball head pipe (13) is slidably connected to the outer wall of the spherical head (11). A fixed pipe (14) is embedded and installed at the bottom of the connecting block (6). An arc-shaped rod (15) is connected through the bottom end of the fixed pipe (14), and the bottom end of the arc-shaped rod (15) is connected to the outer wall of the ball head pipe (13). An air pump (16) is arranged on the inner wall of the connecting block (6), and the air pump (16) is connected to the fixed pipe (14) through a connecting pipe.

2. The dry-mixed mortar production device with adjustable dry sand gradation according to claim 1, wherein: An inner bowl frame (17) is slidably connected to the inner wall of the spherical head (11). An outlet hole (18) is opened through the bottom of the inner bowl frame (17). A connecting rod (19) is installed at the bottom of the inner bowl frame (17). The connecting rod (19) is located on both sides of the outlet hole (18), and the bottom end of the connecting rod (19) is connected to the inner wall of the ball head pipe (13).

3. An apparatus for producing dry-mixed mortar with adjustable dry sand gradation according to claim 1, characterized in that: A top through slot is opened at the top of the ring pipe (10), and the material conveying pipe (4) is inserted into the top through slot. The top of the arc-shaped rod (15) is slidably connected to the inner wall of the fixed pipe (14).

4. The dry-mixed mortar production device with adjustable dry sand gradation according to claim 1, wherein: A second rotating motor (20) is installed on the top of the mixing cylinder (5). The output end of the second rotating motor (20) is connected to a mixing rod (21), and the mixing rod (21) is located inside the mixing cylinder (5). The material conveying pipe (4) is located outside the second rotating motor (20).

5. The dry-mixed mortar production device with adjustable dry sand gradation according to claim 2, characterized in that: The area of the outlet hole (18) is smaller than the area of the outlet (12), and the connecting rod (19) is located inside the outlet (12).

6. The dry-mixed mortar production device with adjustable dry sand gradation according to claim 1, characterized in that: A grading screen (22) is installed inside the grading box (1), and the grading screen (22) is used to grade the aggregate entering the grading box (1).

7. An apparatus for producing dry-mixed mortar with adjustable dry sand gradation according to claim 6, characterized in that: A buffer box (23) is installed on the side and the front of the grading box (1). A feed through groove (24) is formed through the outer wall of the grading box (1), and the feed through groove (24) is located above the grading screen (22). A feed through groove (24) corresponding to the position is arranged on the outer wall of the grading box (1). A weighing bottom plate (25) is installed inside the buffer box (23). A weighing sensor (26) is embedded in the bottom wall of the buffer box (23), and the weighing bottom plate (25) is located above the weighing sensor (26). A discharge through groove (27) is formed through the outer wall of the grading box (1). A fixed through groove (28) is formed through the relative position of the buffer box (23). The fixed through groove (28) and the discharge through groove (27) are located below the feed through groove (24). A partition sieve plate is slidably connected to the inner wall of the fixed through groove (28). An installation groove is formed in the inner wall of the grading box (1), and a telescopic rod (30) is installed on the inner wall of the installation groove. The output end of the telescopic rod (30) is provided with a sealing plate (29), and the sealing plate (29) is used to seal the discharge through groove (27).

8. An apparatus for producing dry-mixed mortar with adjustable dry sand gradation according to claim 7, characterized in that: The buffer box (23) is in a "convex" shape. A lifting plate (32) is slidably connected to the inner wall of the buffer box (23). Convex blocks are arranged on both sides of the lifting plate (32), and the convex blocks penetrate through the inner wall of the buffer box (23) and extend to the outside of the buffer box (23). A rotating motor three (33) is installed on the top of the lifting plate (32). The output end of the rotating motor three (33) is connected with a crushing cutter head (34). A servo motor one (35) is installed on the top of the buffer box (23). The output end of the servo motor one (35) is connected with a lead screw (36), and the convex block is sleeved on the outer wall of the lead screw (36).

9. An apparatus for producing dry-mixed mortar with adjustable dry sand gradation according to claim 7, characterized in that: A spring (37) is installed on the inner wall of the fixed through groove (28), and the spring (37) is symmetrically arranged with respect to the discharge through groove (27). A baffle (38) is installed on the outer wall of the partition sieve mesh (31), and the baffle (38) is located inside the spring (37). A servo motor two (39) is installed on the outer wall of the buffer box (23). The output end of the servo motor two (39) is connected with a rotating rod (40). A frame plate (41) is installed on the outer wall of the rotating rod (40), and the frame plate (41) is located between the dispersion cutter head and the partition sieve mesh (31).

10. An apparatus for producing dry-mixed mortar with adjustable dry sand gradation according to claim 7, characterized in that: The conveyor belt (2) is located between the grading box (1) and the powder bin. The number of groups of the conveyor belt (2) is three, and the right ends of the upper two groups of conveyor belts (2) are located below the buffer box (23).

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