Concrete preparation device for dam construction

Abstract

The invention discloses a concrete preparation device for dam construction. The concrete preparation device comprises a lower box body; the plurality of storage boxes are arranged at the top of the lower box body; the upper part of the rotating rod is rotationally connected with the top of the lower box body, and the lower part is positioned in the lower box body; the upper part of the rotating shaft rotates under the driving of power and moves up and down under the driving of the driving force, the middle part of the rotating shaft penetrates through the rotating rod, and stirring blades are arranged at the lower part; the baffle is arranged in the lower box body, the rotating rod penetrates through the baffle and is fixedly connected with the baffle, and at least one group of openings are formed in the baffle; the rotating rod penetrates through the fixing plate and is rotationally connected with the fixing plate, and the fixing plate is fixedly connected with the inner side wall of the lower box body; a long-strip-shaped discharging opening is formed in the fixing plate in the radial direction of the fixing plate. And the at least one push plate is arranged between the baffle and the fixed plate, one end of each push plate is fixedly connected with the rotating rod, and the other end of each push plate is close to the inner side wall of the lower box body. The concrete mixer can uniformly mix concrete.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy engineering, and more particularly to a concrete preparation device for dam construction. Background Art

[0002] Dam refers to the weirs that block the flow of water, the dikes of reservoirs and rivers, etc. Concrete, referred to as "concrete", refers to artificial stone made of cement as the main cementitious material, mixed with water, sand, gravel and other raw materials in appropriate proportions, and then evenly mixed, compacted and hardened. The construction of water conservancy dams must be based on good concrete raw materials. Insufficient concrete mixing will cause greater safety hazards to the built water conservancy dams.

[0003] The existing patent application publication number CN111823393 A discloses a concrete preparation device for water conservancy dam construction. When in use, all concrete raw materials are placed in an inner box and then stirred. Although the inner box can move left and right and up and down during the stirring process, which is helpful for mixing the concrete, a more powerful driving device needs to be added, which increases the cost of use. In addition, the presence of a large amount of raw materials in the inner box at the same time will still lead to uneven stirring. Summary of the invention

[0004] The purpose of the present invention is to provide a concrete preparation device for dam construction. When in use, cement, stone, fine sand and water are first stored in different storage boxes, and then the upper part of the rotating shaft is rotated under the drive of power and moved up and down under the drive of driving force. During the rotation of the rotating shaft, the rotating rod and the stirring blade are driven to rotate synchronously. The rotation of the rotating rod can make the baffle and the push plate rotate synchronously. When the baffle rotates to the discharge port of each storage box and multiple openings in any group of openings are opposite to each other, the raw materials in each storage box fall onto the fixed plate through the corresponding openings, which can avoid a large amount of raw materials from accumulating in the lower box body. Then, the raw materials falling onto the fixed plate fall into the lower part of the lower box body through the discharge port under the push of the push plate, and then are stirred by the stirring blade. When the rotating shaft moves up and down, the stirring blade can move up and down in the lower box body, and the concrete can be fully stirred.

[0005] In order to achieve these objects and other advantages of the present invention, there is provided a concrete preparation device for dam construction, comprising: The box body comprises a lower box body, which is in the shape of a hollow cylinder, and a concrete outlet is arranged at the lower part of the lower box body; A plurality of material storage boxes are arranged on the top of the lower box body; The rotating rod is in the shape of a hollow cylinder and is coaxially arranged with the lower box body. The upper part of the rotating rod is rotatably connected to the top of the lower box body, and the lower part is located in the lower box body. The upper part of the rotating shaft rotates under the driving force and moves up and down under the driving force. The middle part passes through the rotating rod and is coaxially arranged with the rotating rod. The lower part is provided with stirring blades. The rotating shaft can drive the rotating rod to rotate synchronously and can move up and down relative to the rotating rod. The baffle is horizontally arranged in the lower box body, the rotating rod passes through the baffle and is fixedly connected to the baffle, and at least one group of openings is arranged on the baffle; for any group of openings, it is composed of multiple openings, and the number of openings is equal to the number of storage boxes and corresponds one to one; when the baffle rotates with the rotating rod, the discharge ports of each storage box can correspond to the multiple openings in each group of openings one by one in sequence; The fixed plate is circular and horizontally arranged. The rotating rod passes through the fixed plate and is rotatably connected with the fixed plate. The diameter of the fixed plate is equal to the inner diameter of the lower box body. The fixed plate is fixedly connected to the inner side wall of the lower box body. A long strip-shaped feeding port is arranged on the fixed plate along its radial direction. At least one push plate is arranged between the baffle plate and the fixed plate. Each push plate is arranged vertically and extends along the radial direction of the fixed plate. One end of each push plate is fixedly connected to the rotating rod, and the other end is close to the inner wall of the lower box body.

[0006] Preferably, in the concrete preparation device for dam construction, both ends of the feed opening extend to the edge of the fixed plate and the rotating rod respectively.

[0007] Preferably, in the concrete preparation device for dam construction, when there are multiple groups of openings, one group of openings corresponds to one push plate, and for any group of openings, the openings and the push plates corresponding thereto are arranged sequentially along the rotation direction of the baffle.

[0008] Preferably, the concrete preparation device for dam construction further comprises: A plurality of scrapers are arranged at intervals along the circumferential direction of the rotating rod and are located below the fixed plate. Each scraper is in an inverted L shape. The ends of the horizontal parts of each scraper are fixedly connected to the outer wall of the rotating rod, and the vertical parts are in contact with the inner wall of the lower box body. When the stirring blade moves upward driven by the rotating shaft, the stirring blade is always located below the horizontal part of the scraper.

[0009] Preferably, in the concrete preparation device for dam construction, the horizontal portion of each scraper is not opposite to the stirring blade, and at least one stirring rod is provided below it, each stirring rod is not in contact with the stirring blade, and its bottom is close to the bottom of the lower box.

[0010] Preferably, in the concrete preparation device for dam construction, the baffle is circular, and its diameter is 0.05-1 mm smaller than the inner diameter of the lower box.

[0011] Preferably, in the concrete preparation device for dam construction, a plurality of first limit grooves are provided on the inner side wall of the rotating rod, each of the first limit grooves is provided in the vertical direction and does not pass through the top and the bottom of the rotating rod, and a plurality of first sliders are provided on the rotating shaft, one first slider corresponds to one first limit groove, and each first slider is respectively provided in the first limit groove corresponding thereto; when the rotating shaft moves up and down between the first position and the second position driven by the driving force, each first slider moves up and down between the top and the bottom of the first limit groove corresponding thereto.

[0012] Preferably, in the concrete preparation device for dam construction, the box body further comprises an upper box body, the interior of the upper box body is hollow, the bottom is open, and the upper box body is covered on the lower box body, an opening is provided on the side wall of the lower part of the upper box body, a door body or a cover body is provided at the opening, and the plurality of storage boxes are close to the opening; a groove is provided on the upper part of the rotating shaft, and the groove extends downward from the top of the rotating shaft; The concrete preparation device for dam construction also includes: A driving shaft is coaxially arranged with the rotating shaft, the lower part of the driving shaft is inserted into the groove, the top part passes through the top of the upper box body, and rotates under the drive of the power device; a plurality of second limiting grooves are arranged on the outer side wall of the driving shaft, each of the second limiting grooves is arranged in the vertical direction and does not pass through the top and bottom of the driving shaft, and a plurality of second sliders are arranged on the inner side wall of the upper part of the rotating shaft, one second slider corresponds to one second limiting groove, and each second slider is respectively arranged in the second limiting groove corresponding to it; The moving rod is sleeved on the outer portion of the upper portion of the rotating shaft and is rotatably connected to the rotating shaft. The moving rod moves up and down under the driving force and drives the rotating shaft to move up and down relative to the active shaft. When the rotating shaft moves up and down between the first position and the second position, each second slider moves up and down between the top and bottom of the second limit groove corresponding to it.

[0013] Preferably, the concrete preparation device for dam construction further comprises: a pair of nut seats, symmetrically arranged on the outer side wall of the moving rod; A pair of screw rods corresponds to a pair of nut seats one by one, each screw rod is vertically arranged, and each nut seat is respectively arranged on the corresponding screw rod. When the screw rod rotates under the driving force, the nut seat drives the moving rod to move up and down.

[0014] Preferably, the concrete preparation device for dam construction further comprises: A pair of guide plates, which are symmetrical and spaced apart in the upper box, and each guide plate is horizontally arranged; A pair of guide rods are symmetrically arranged in the upper box body, each guide rod is vertically arranged, and the pair of guide rods pass through a pair of guide plates respectively; when the rotating shaft moves up and down between the first position and the second position, the pair of guide rods always pass through the pair of guide plates.

[0015] The present invention has at least the following beneficial effects: When the concrete preparation device of the present invention is used, cement, stone, fine sand and water are first stored in different storage boxes respectively, and then the rotating shaft is driven to rotate by the driving shaft, and the moving rod is moved up and down to drive the rotating shaft to move up and down. During the rotation of the rotating shaft, the rotating rod and the stirring blade are driven to rotate synchronously. The rotation of the rotating rod can make the baffle and the push plate rotate synchronously. When the baffle rotates to the discharge port of each storage box and the multiple openings in any group of openings are opposite to each other, the raw materials in each storage box fall onto the fixed plate through the corresponding openings, which can avoid a large amount of raw materials from accumulating in the lower box body. Then, the raw materials that fall onto the fixed plate fall into the lower part of the lower box body through the discharge port under the push of the push plate, and then are stirred by the stirring blades. When the rotating shaft moves up and down, the stirring blades can move up and down in the lower box body, and the concrete can be fully stirred.

[0016] The present invention provides a scraper and fixes the scraper on a rotating rod so that the scraper can continuously scrape off the concrete adhering to the inner wall of the lower box. By providing a stirring rod and fixing the stirring rod on the horizontal part of the scraper, the concrete at the upper and lower parts of the lower box can be further stirred. The stirring blade and the stirring rod are used in combination to make the concrete more evenly stirred.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a concrete preparation device for dam construction in a use state according to an embodiment of the present invention; Figure 2 is a structural schematic diagram of another use state of a concrete preparation device for dam construction according to an embodiment of the present invention; Figure 3 It is a vertical projection diagram of a fixed plate, a baffle, discharge ports of multiple storage boxes and a rotating rod according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0020] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] like Figures 1 to 3 As shown, the present invention provides a concrete preparation device for dam construction, comprising: The box body 1 comprises a lower box body, which is in the shape of a hollow cylinder, and a concrete outlet is arranged at the lower part of the lower box body; A plurality of storage boxes 2, which are arranged on the top of the lower box body; The rotating rod 3 is in the shape of a hollow cylinder and is coaxially arranged with the lower box body. The upper part of the rotating rod 3 is rotatably connected to the top of the lower box body, and the lower part is located in the lower box body. The upper part of the rotating shaft 4 rotates under the driving force and moves up and down under the driving force. The rotation and up and down movement of the rotating shaft 4 can be performed separately or synchronously. When they are performed separately, it is necessary to ensure that the interval between the two is short. The middle part of the rotating shaft 4 passes through the rotating rod 3 and is coaxially arranged with the rotating rod 3. The lower part is provided with a stirring blade. The rotating shaft 4 can drive the rotating rod 3 to rotate synchronously and can move up and down relative to the rotating rod 3, that is, the rotating shaft 4 can rotate and move up and down, and the rotating rod 3 can only rotate with the rotating shaft 4, and cannot move up and down with the rotating shaft 4; The baffle plate 5 is horizontally arranged in the lower box body, the rotating rod 3 passes through the baffle plate 5 and is fixedly connected to the baffle plate 5, and at least one group of openings 501 is arranged on the baffle plate 5; for any group of openings 501, it is composed of a plurality of openings 501, and the number of openings 501 is equal to the number of storage boxes 2, and they correspond one to one; during the rotation of the baffle plate 5 with the rotating rod 3, the discharge port 201 of each storage box 2 can correspond to the plurality of openings 501 in each group of openings 501 in sequence, and when the baffle plate 5 is rotated to the point where the discharge port 201 of each storage box 2 corresponds to the plurality of openings 501 in any group of openings 501 When the openings 501 are opposite to each other, the raw materials in each storage box 2 fall through the openings 501 corresponding to it. For example, if there are five storage boxes 2, then a group of openings consists of five openings. When the discharge port 201 of one storage box 2 is opposite to one of the openings in a group, the discharge ports 201 of the other four storage boxes 2 are opposite to the other four openings in a group, so as to ensure that the five kinds of raw materials fall onto the fixed plate 6 at the same time. During the concrete making process, the raw materials need to be mixed in a certain proportion. In order to make the raw materials mixed in proportion, the raw materials can be made to fall into the lower box body in proportion. In order to make the raw materials fall into the lower box body in proportion, the sizes of the multiple openings 501 corresponding to a group of openings 501 can be designed. During the specific design, for any opening 501 and the corresponding raw material, the size of the opening 501 can be temporarily determined first, and then the rotating shaft 4 is rotated at a set speed for a time t, and the rotating shaft 4 is moved up and down. Then, the size of the opening 501 is corrected according to the actual falling amount of the raw material and the target falling amount within the time t. For example, if the actual falling amount is N times the target falling amount, the size of the opening 501 is adjusted to 1 / N of the original size, and then repeated until the actual falling amount within the time t is consistent with the target falling amount.

[0022] The fixed plate 6 is circular and horizontally arranged. The rotating rod 3 passes through the fixed plate 6 and is rotatably connected to the fixed plate 6. The diameter of the fixed plate 6 is equal to the inner diameter of the lower box body. The fixed plate 6 is fixedly connected to the inner side wall of the lower box body. A long strip-shaped discharge port 601 is arranged on the fixed plate 6 along its radial direction. At least one push plate 7 is arranged between the baffle plate 5 and the fixed plate 6. Each push plate 7 is vertically arranged and extends along the radial direction of the fixed plate 6. One end of each push plate 7 is fixedly connected to the rotating rod 3, and the other end is close to the inner wall of the lower box body.

[0023] The concrete preparation device for dam construction provided by the present solution, when in use, first stores cement, stone, fine sand and water in different storage boxes 2, and then makes the upper part of the rotating shaft 4 rotate under the driving force and move up and down under the driving force. During the rotation of the rotating shaft 4, the rotating rod 3 and the stirring blade are driven to rotate synchronously. The rotation of the rotating rod 3 can make the baffle 5 and the push plate 7 rotate synchronously. When the baffle 5 rotates to the discharge port 201 of each storage box 2 and the multiple openings 501 in any group of openings 501 are opposite to each other, the raw materials in each storage box 2 fall onto the fixed plate 6 through the corresponding opening 501 (according to the set ratio), and then fall into the lower part of the lower box body through the discharge port 601 under the push of the push plate 7, and then stir through the stirring blade. When the rotating shaft 4 moves up and down, the stirring blade can move up and down in the lower box body, and the concrete can be fully stirred.

[0024] In another embodiment, in the concrete preparation device for dam construction, both ends of the discharge port 601 extend to the edge of the fixed plate 6 and the rotating rod 3 respectively. The discharge port 601 is relatively long, so that the raw materials on the fixed plate 6 can fall through the discharge port 601 under the push of the push plate 7.

[0025] In another embodiment, in the concrete preparation device for dam construction, when there are multiple groups of openings 501, one group of openings 501 corresponds to one push plate 7. For any group of openings 501, it and the push plate 7 corresponding thereto are arranged sequentially along the rotation direction of the baffle 5, so that after a variety of raw materials fall through a group of openings 501, the push plate 7 corresponding to the group of openings 501 can quickly push the raw materials to the discharge port 601.

[0026] In another embodiment, the concrete preparation device for dam construction further comprises: A plurality of scrapers 8 are arranged at intervals along the circumferential direction of the rotating rod 3 and are located below the fixed plate 6. Each scraper 8 is in an inverted L shape. The ends of the horizontal portions of each scraper 8 are fixedly connected to the outer wall of the rotating rod 3, and the vertical portions are in contact with the inner wall of the lower box body. When the stirring blade moves upward driven by the rotating shaft 4, the stirring blade is always located below the horizontal portion of the scraper 8. By arranging the scraper 8 and fixing the scraper 8 on the rotating rod 3, the scraper 8 can continuously scrape off the concrete adhering to the inner wall of the lower box body during the rotation of the rotating shaft 4.

[0027] In another embodiment, in the concrete preparation device for dam construction, the horizontal portion of each scraper 8 is not opposite to the stirring blade, and at least one stirring rod 9 is provided below it, each stirring rod 9 is not in contact with the stirring blade, and its bottom is close to the bottom of the lower box. Since the rotating shaft 4 and the rotating rod 3 rotate synchronously, the stirring blade and the stirring rod 9 also rotate synchronously. When the stirring blade stirs the concrete in the upper part of the lower box, the stirring rod 9 can stir the concrete in the upper and lower parts of the lower box to a certain extent, thereby avoiding the lack of stirring of the concrete in the lower part of the lower box in a short time. When the stirring blade stirs the concrete in the lower part of the lower box, the stirring rod 9 can stir the concrete in the upper and lower parts of the lower box to a certain extent, thereby avoiding the lack of stirring of the concrete in the upper part of the lower box in a short time. The use of the stirring blade and the stirring rod 9 together can make the mixing of concrete more uniform.

[0028] In another embodiment, in the concrete preparation device for dam construction, the baffle 5 is circular, and its diameter is 0.05-1 mm smaller than the inner diameter of the lower box.

[0029] In another embodiment, in the concrete preparation device for dam construction, a plurality of first limiting grooves are arranged on the inner side wall of the rotating rod 3, each of which is arranged in the vertical direction and does not penetrate the top and bottom of the rotating rod 3, and a plurality of first sliders 401 are arranged on the rotating shaft 4, one first slider 401 corresponds to one first limiting groove, and each first slider 401 is arranged in the first limiting groove corresponding thereto; when the rotating shaft 4 moves up and down between the first position and the second position driven by the driving force, each first slider 401 moves up and down between the top and bottom of the first limiting groove corresponding thereto, and the first slider 401 and the first limiting groove can make the rotating rod 3 rotate with the rotating shaft 4 during the rotation of the rotating shaft 4, and can make the rotating shaft 4 move up and down relative to the rotating rod 3 during the up and down movement of the rotating shaft 4. Since the rotating shaft 4 is rotatably connected to the rotating rod 3, the rotating rod 3 will not interfere with the rotation of the rotating shaft 4, but when the rotating shaft 4 moves up and down, the rotating rod 3 cannot move up and down with the rotating shaft 4. The rotation and up and down movement of the rotating shaft 4 can be performed separately or simultaneously. When performed separately, the rotating shaft 4 can be moved downward and then rotated for a certain time, and then the rotating shaft 4 can be stopped for a certain time and then moved upward and then rotated for a certain time.

[0030] In another embodiment, in the concrete preparation device for dam construction, the box body further includes an upper box body, the interior of the upper box body is hollow, and the bottom is open, and the box body is covered on the lower box body, and an opening 101 is provided on the side wall of the lower part of the upper box body, and a door body or a cover body is provided at the opening 101. When the raw materials are introduced into the multiple storage boxes 2, the opening can be opened, and the opening can be closed at other times. The multiple storage boxes 2 are close to the opening 101, so that the raw materials are easily introduced into the storage boxes 2; a groove 403 is provided on the upper part of the rotating shaft 4, and the groove 403 extends downward from the top of the rotating shaft 4; The concrete preparation device for dam construction also includes: The driving shaft 10 is coaxially arranged with the rotating shaft 4, the lower part of the driving shaft 10 is inserted into the groove 403, the top part passes through the top of the upper box body, and rotates under the drive of the power device; a plurality of second limiting grooves are arranged on the outer wall of the driving shaft 10, each of which is arranged in the vertical direction and does not pass through the top and bottom of the driving shaft 10, and a plurality of second sliders 402 are arranged on the inner wall of the upper part of the rotating shaft 4, one second slider 402 corresponds to one second limiting groove, and each second slider 402 is respectively arranged in the second limiting groove corresponding to it; the second slider 402 and the second limiting groove can make the rotating shaft 4 rotate with the driving shaft 10 during the rotation of the driving shaft 10, and can make the rotating shaft 4 move up and down relative to the driving shaft 10 during the up and down movement of the rotating shaft 4.

[0031] The moving rod 15 is sleeved outside the upper part of the rotating shaft 4 and is rotatably connected to the rotating shaft 4. The moving rod 15 moves up and down under the driving force, and drives the rotating shaft 4 to move up and down relative to the driving shaft 10. When the rotating shaft 4 moves up and down between the first position and the second position, each second slider 402 moves up and down between the top and the bottom of the second limiting groove corresponding thereto. The driving shaft 10 drives the rotating shaft 4 to rotate, so that the moving rod 15 moves up and down, thereby driving the rotating shaft 4 to move up and down.

[0032] In another embodiment, the concrete preparation device for dam construction further comprises: a pair of nut seats 11, which are symmetrically arranged on the outer side wall of the moving rod 15; A pair of screw rods 12 corresponds to a pair of nut seats 11 one by one. Each screw rod 12 is vertically arranged. Each nut seat 11 is respectively arranged on the corresponding screw rod 12. When the screw rod 12 rotates under the driving force, the nut seat 11 drives the moving rod 15 and the rotating shaft 4 to move up and down.

[0033] In another embodiment, the concrete preparation device for dam construction further comprises: A pair of guide plates 13, which are symmetrical and spaced apart in the upper box, and each guide plate 13 is horizontally arranged; A pair of guide rods 14 are symmetrically arranged in the upper box body, each guide rod 14 is vertically arranged, and the pair of guide rods 14 respectively pass through the pair of guide plates 13; when the rotating shaft 4 moves up and down between the first position and the second position, the pair of guide rods 14 always pass through the pair of guide plates 13. By providing a pair of guide plates 13 and a pair of guide rods 14, a guiding function can be played during the movement of the two nut seats 11, so that the movement of the two nut seats 11 is more stable.

[0034] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A concrete preparation device for dam construction, characterized in that: include: The box body comprises a lower box body, which is in the shape of a hollow cylinder, and a concrete outlet is arranged at the lower part of the lower box body; A plurality of material storage boxes are arranged on the top of the lower box body; The rotating rod is in the shape of a hollow cylinder and is coaxially arranged with the lower box body. The upper part of the rotating rod is rotatably connected to the top of the lower box body, and the lower part is located in the lower box body. The upper part of the rotating shaft rotates under the driving force and moves up and down under the driving force. The middle part passes through the rotating rod and is coaxially arranged with the rotating rod. The lower part is provided with stirring blades. The rotating shaft can drive the rotating rod to rotate synchronously and can move up and down relative to the rotating rod. The baffle is horizontally arranged in the lower box body, the rotating rod passes through the baffle and is fixedly connected to the baffle, and at least one group of openings is arranged on the baffle; for any group of openings, it is composed of multiple openings, and the number of openings is equal to the number of storage boxes and corresponds one to one; when the baffle rotates with the rotating rod, the discharge ports of each storage box can correspond to the multiple openings in each group of openings one by one in sequence; The fixed plate is circular and horizontally arranged. The rotating rod passes through the fixed plate and is rotatably connected with the fixed plate. The diameter of the fixed plate is equal to the inner diameter of the lower box body. The fixed plate is fixedly connected to the inner side wall of the lower box body. A long strip-shaped feeding port is arranged on the fixed plate along its radial direction. At least one push plate is arranged between the baffle plate and the fixed plate. Each push plate is arranged vertically and extends along the radial direction of the fixed plate. One end of each push plate is fixedly connected to the rotating rod, and the other end is close to the inner wall of the lower box body.

2. The concrete preparation device for dam construction according to claim 1, characterized in that: The two ends of the material discharge port extend to the edge of the fixed plate and the rotating rod respectively.

3. The concrete preparation device for dam construction according to claim 1, characterized in that: When there are multiple groups of openings, one group of openings corresponds to one push plate. For any group of openings, the openings and the push plates corresponding thereto are arranged sequentially along the rotation direction of the baffle.

4. The concrete preparation device for dam construction according to claim 1, characterized in that: Also includes: A plurality of scrapers are arranged at intervals along the circumferential direction of the rotating rod and are located below the fixed plate. Each scraper is in an inverted L shape. The ends of the horizontal parts of each scraper are fixedly connected to the outer wall of the rotating rod, and the vertical parts are in contact with the inner wall of the lower box body. When the stirring blade moves upward driven by the rotating shaft, the stirring blade is always located below the horizontal part of the scraper.

5. The concrete preparation device for dam construction according to claim 4, characterized in that: The horizontal part of each scraper is not opposite to the stirring blade, and at least one stirring rod is arranged below each scraper. Each stirring rod is not in contact with the stirring blade, and the bottom of each stirring rod is close to the bottom of the lower box body.

6. The concrete preparation device for dam construction according to claim 1, characterized in that: The baffle is circular, and its diameter is 0.05-1 mm smaller than the inner diameter of the lower box.

7. The concrete preparation device for dam construction according to claim 1, characterized in that: A plurality of first limit grooves are arranged on the inner side wall of the rotating rod, each of which is arranged in the vertical direction and does not pass through the top and the bottom of the rotating rod; a plurality of first sliders are arranged on the rotating shaft, one first slider corresponds to one first limit groove, and each first slider is respectively arranged in the first limit groove corresponding thereto; when the rotating shaft moves up and down between the first position and the second position driven by the driving force, each first slider moves up and down between the top and the bottom of the first limit groove corresponding thereto.

8. The concrete preparation device for dam construction according to claim 7, characterized in that: The box body also includes an upper box body, the interior of the upper box body is hollow, the bottom is open, and the upper box body is covered on the lower box body, the side wall of the lower part of the upper box body is provided with an opening, the opening is provided with a door body or a cover body, and the plurality of storage boxes are close to the opening; the upper part of the rotating shaft is provided with a groove, and the groove extends downward from the top of the rotating shaft; The concrete preparation device for dam construction also includes: A driving shaft is coaxially arranged with the rotating shaft, the lower part of the driving shaft is inserted into the groove, the top part passes through the top of the upper box body, and rotates under the drive of the power device; a plurality of second limiting grooves are arranged on the outer side wall of the driving shaft, each of the second limiting grooves is arranged in the vertical direction and does not pass through the top and bottom of the driving shaft, and a plurality of second sliders are arranged on the inner side wall of the upper part of the rotating shaft, one second slider corresponds to one second limiting groove, and each second slider is respectively arranged in the second limiting groove corresponding to it; The moving rod is sleeved on the outer portion of the upper portion of the rotating shaft and is rotatably connected to the rotating shaft. The moving rod moves up and down under the driving force and drives the rotating shaft to move up and down relative to the active shaft. When the rotating shaft moves up and down between the first position and the second position, each second slider moves up and down between the top and bottom of the second limit groove corresponding to it.

9. The concrete preparation device for dam construction according to claim 8, characterized in that: Also includes: a pair of nut seats, symmetrically arranged on the outer side wall of the moving rod; A pair of screw rods corresponds to a pair of nut seats one by one, each screw rod is vertically arranged, and each nut seat is respectively arranged on the corresponding screw rod. When the screw rod rotates under the driving force, the nut seat drives the moving rod to move up and down.

10. The concrete preparation device for dam construction according to claim 9, characterized in that: Also includes: A pair of guide plates, which are symmetrical and spaced apart in the upper box, and each guide plate is horizontally arranged; A pair of guide rods are symmetrically arranged in the upper box body, each guide rod is vertically arranged, and the pair of guide rods pass through a pair of guide plates respectively; when the rotating shaft moves up and down between the first position and the second position, the pair of guide rods always pass through the pair of guide plates.

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