A sand making machine for construction engineering

Abstract

This invention belongs to the field of construction equipment technology, specifically referring to a sand making machine for construction engineering. It includes a machine body, a pretreatment mechanism, a sand making mechanism, a propulsion mechanism, and a screening mechanism. The pretreatment mechanism is located at the top of the machine body, the sand making mechanism is located on the inner wall of the machine body, the propulsion mechanism is located on the side wall of the machine body, and the screening mechanism is located at the bottom of the machine body. This invention, by incorporating a separation mechanism, utilizes the cross-vibration and shaking of upper and lower vibrating rods to cause the stones on the surface to vibrate up and down and slide down, preventing blockages while enhancing the separation effect. This effectively solves the technical problems of uneven crushing and easy blockage caused by the mixing of large and small stones in existing technologies. Furthermore, by incorporating a propulsion mechanism, the rotation of the rotating chassis allows the crushed stones to enter the next stage of crushing, while simultaneously pushing uncrushed large stones towards the first impeller for further crushing, effectively solving the technical problems of easy blockage and stone accumulation residue in existing technologies.

Description

Technical Field

[0001] This invention belongs to the field of construction equipment technology, specifically referring to a sand making machine for construction projects. Background Technology

[0002] Construction projects require a large amount of sand and gravel, but the amount of sand and gravel that can be obtained directly is limited. Therefore, sand making is necessary. The equipment used for sand making is a sand making machine, which uses the "stone-on-stone" and "stone-on-iron" methods to crush large stones to obtain smaller sand and gravel. The principle of the sand making machine is simple, directly using collision crushing, but it still has some problems.

[0003] Currently, during crushing, the material is fed into the rotating impeller from the center. The impeller's rotation then throws the large stones outwards, where they collide with the outer impact blocks and are crushed. However, the feed contains stones of varying sizes and masses. If stones of different masses all fall into the center of the impeller and are thrown out at the same speed, the impact force on the smaller stones will be too large. This results in wasted energy and increased damage to the impact blocks, reducing their service life.

[0004] Currently, there is a lack of sand making equipment that can effectively crush stones according to their size and produce uniformly crushed stones. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a sand making machine for construction engineering. This invention incorporates a separation mechanism that utilizes a wave-shaped vibrating groove to allow the vibrating wheel to slide vertically up and down, achieving the technical effect of a vibrating rod. The alternating vertical and horizontal vibrations cause surface stones to slide down, preventing blockages and enhancing the separation effect. This effectively solves the technical problems of uneven crushing and blockage caused by mixing large and small stones in existing technologies. Furthermore, a propulsion mechanism, using the rotation of the base and guided by the propulsion impeller, allows crushed stones to enter the next stage of crushing. Simultaneously, it pushes uncrushed large stones towards the first impeller for further crushing, achieving a propulsive crushing effect. This effectively solves the technical problems of blockages and stone accumulation in existing technologies, improving the working efficiency of the device. Finally, a sand making mechanism, utilizing separation crushing, separates large and small stones while simultaneously mixing the crushed large and small stones for further crushing, achieving a graded crushing effect. This effectively solves the technical problem of uneven crushing caused by mixing large and small stones in existing technologies.

[0006] The technical solution adopted by this invention is as follows: This solution provides a sand making machine for construction engineering, including a machine body, a pretreatment mechanism, a sand making mechanism, a propulsion mechanism, and a screening mechanism. The pretreatment mechanism is located at the top of the machine body, the sand making mechanism is located on the inner wall of the machine body, the propulsion mechanism is located on the side wall of the machine body, and the screening mechanism is located at the bottom of the machine body. The pretreatment mechanism includes a separation mechanism and a conveying mechanism. The separation mechanism is located at the top of the machine body, and the conveying mechanism is located at the bottom of the separation mechanism. The sand making mechanism includes a large crushing mechanism and a small crushing mechanism. The large crushing mechanism is located on the inner side wall of the machine body, and the small crushing mechanism is located on the inner side wall of the machine body.

[0007] Furthermore, the separation mechanism includes a separation chamber, a first servo motor, a support frame, an upper vibrating rod, a lower vibrating rod, a vibrating wheel, a fixed cylinder, a vibrating cylinder, and a vibrating groove. The separation chamber is fixedly installed at the top of the machine body, the support frame is fixedly installed on the inner side wall of the separation chamber, the first servo motor is fixedly installed at the top of the support frame, the fixed cylinder is fixedly installed on the bottom wall of the support frame, the upper vibrating rod array is rotatably installed on the side wall of the fixed cylinder, the lower vibrating rod array is rotatably installed on the side wall of the fixed cylinder, the vibrating cylinder is coaxially rotatably installed at the output end of the first servo motor, the vibrating cylinder is located inside the fixed cylinder, the vibrating wheel is rotatably installed on the side walls of the upper and lower vibrating rods, and the vibrating grooves are opened in pairs on the outer circumference of the vibrating cylinder, with the vibrating wheel rolling on the inner wall of the vibrating groove.

[0008] Furthermore, the large crushing mechanism includes a crushing frame, a second servo motor, a first gear, rotating gear teeth, a first rotating disk, and a first impeller. The crushing frame is fixedly mounted on the inner wall of the machine body, the first rotating disk is rotatably mounted on the top of the crushing frame, and the first rotating disk is annular in shape. The second servo motor is fixedly mounted on the side wall of the crushing frame, the first gear is coaxially fixedly mounted on the output end of the second servo motor, the rotating gear tooth array is fixedly mounted on the inner wall of the first rotating disk, and the first impeller array is fixedly mounted on the top of the first rotating disk.

[0009] Furthermore, the small crushing mechanism includes a fixed frame, a third servo motor, a second gear, a third gear, a second rotating disk, and a second impeller. The fixed frame is fixedly installed on the inner wall of the machine body, the second rotating disk is rotatably installed on the top of the fixed frame, the third servo motor is fixedly installed on the side wall of the fixed frame, the second gear is coaxially fixedly installed on the output end of the third servo motor, the bottom end of the third gear is fixedly sleeved on the side wall of the second rotating disk, and the second impeller array is fixedly installed on the top of the second rotating disk.

[0010] Furthermore, the propulsion mechanism includes a fourth servo motor, a rotating groove, a fourth gear, push wheel teeth, a rotating chassis, and a propulsion impeller. The rotating groove is formed on the inner wall of the machine body, the fourth servo motor is fixedly mounted on the side wall of the rotating groove, the fourth gear is coaxially fixedly mounted on the output end of the fourth servo motor, the rotating chassis is rotatably mounted on the side wall of the rotating groove, the push wheel tooth array is fixedly mounted on the outer circumference of the rotating chassis, and the propulsion impeller array is fixedly mounted on the side wall of the machine body.

[0011] Furthermore, the screening mechanism includes a screen trough, a screen frame, a limiting block, a screen mesh, a vibrating rack, an intermittent gear, and a fifth servo motor. The screen trough array is located at the bottom of the machine body. The screen frame is slidably mounted on the side wall of the screen trough. The limiting block is fixedly mounted on the top of the screen frame and slides on the side wall of the screen trough. The screen mesh is fixedly mounted on the side wall of the screen frame. The vibrating rack is fixedly mounted on the side wall of the screen frame. The fifth servo motor is fixedly mounted on the side wall of the machine body. The intermittent gear is coaxially fixedly mounted on the output end of the fifth servo motor.

[0012] Furthermore, the material conveying mechanism includes a feed hopper, an auxiliary frame, and a conveying pipe. The auxiliary frame is fixedly installed on the bottom wall of the fixed cylinder, the feed hopper is fixedly installed at the bottom end of the auxiliary frame, and the conveying pipe is fixedly installed at the bottom end of the feed hopper. The conveying pipe passes through the top of the crushing frame.

[0013] Furthermore, an electrical control panel is fixedly installed on the side wall of the machine body. The electrical control panel is electrically connected to the first servo motor, the second servo motor, the third servo motor, the fourth servo motor, and the fifth servo motor via wires.

[0014] Furthermore, the first gear meshes with the rotating gear teeth, the second gear meshes with the third gear, the fourth gear meshes with the driving gear teeth, and the intermittent gear meshes with the vibrating rack.

[0015] Furthermore, the upper and lower vibrating rods are arranged in a cross pattern, the bottom end of the propulsion impeller is in close contact with the top of the rotating chassis, and the side wall of the vibration groove is wavy.

[0016] Furthermore, the model number of the electrical control panel is SYC89C52RC-401.

[0017] Compared with the prior art, the beneficial effects of the present invention are: (1) By providing a separation mechanism, the present invention utilizes a wave-shaped vibration groove to allow the vibration wheel to slide up and down in the vertical direction, thereby achieving the technical effect of a vibrating vibrator. Furthermore, the up-and-down vibration, cross vibration, and shaking cause the stones on its surface to vibrate up and down and slide down, which not only prevents blockage but also enhances the separation effect, effectively solving the technical problem of uneven crushing and easy blockage of large and small stones in the prior art. (2) By providing a sand making mechanism, the present invention separates large stones from small stones by using separation crushing, and at the same time mixes the crushed large stones with small stones for crushing, thereby achieving the technical effect of graded crushing and effectively solving the technical problem of uneven crushing caused by mixing large stones with small stones in the prior art. (3) By providing a propulsion mechanism, the present invention utilizes the rotation of the rotating chassis and the guidance of the propulsion impeller to allow the crushed stones to enter the next stage of crushing, while pushing the uncrushed large stones to the first impeller for further crushing, thus achieving the technical effect of propulsion crushing. This effectively solves the technical problems of easy clogging and stone accumulation in the prior art and improves the working efficiency of the device. (4) The present invention has a screening mechanism with a screen at the bottom of the discharge port, which can screen the crushed stones. The intermittent gear and the vibrating rack work together to achieve the technical effect of the screen frame vibrating up and down, effectively solving the technical problem of impure stones in the prior art. (5) The entire process of this invention is mechanically processed, and no manual control or operation is required for the machine, which greatly reduces the workload of Mr. Gong, saves crushing time, and improves sand making efficiency. Attached Figure Description

[0018] Figure 1 This is a perspective view of a sand making machine for construction engineering proposed in this invention; Figure 2 This is a first perspective sectional view of a sand making machine for construction engineering proposed in this invention; Figure 3 for Figure 2 Enlarged view of section A in the middle; Figure 4 This is a cross-sectional view of a sand making machine for construction engineering proposed in this invention; Figure 5 for Figure 4 Enlarged view of section B in the middle; Figure 6 for Figure 4 Enlarged view of section C; Figure 7 for Figure 4 Enlarged view of section D; Figure 8 for Figure 4 Enlarged view of section E in the middle; Figure 9 This is a second perspective sectional view of a sand making machine for construction engineering proposed in this invention; Figure 10 for Figure 9 Enlarged view of section F in the middle.

[0019] The components include: 1. Machine body; 2. Pre-treatment mechanism; 3. Sand making mechanism; 4. Propulsion mechanism; 5. Screening mechanism; 310. Large crushing mechanism; 320. Small crushing mechanism; 210. Separation mechanism; 220. Conveying mechanism; 211. Separation bin; 212. First servo motor; 213. Support frame; 214. Upper vibrating rod; 215. Lower vibrating rod; 216. Vibrating wheel; 217. Fixed cylinder; 218. Vibrating cylinder; 219. Vibrating trough; 221. Feed hopper; 222. Auxiliary frame; 223. Conveying pipe; 311. Crushing frame; 312. Second servo motor; 313. First gear. 314. Rotating gear teeth; 315. First rotating disk; 316. First impeller; 321. Fixed frame; 322. Third servo motor; 323. Second gear; 324. Third gear; 325. Second rotating disk; 326. Second impeller; 401. Fourth servo motor; 402. Rotating groove; 403. Fourth gear; 404. Pushing gear teeth; 405. Rotating chassis; 406. Propulsion impeller; 501. Screen groove; 502. Screen frame; 503. Limiting block; 504. Screen mesh; 505. Vibrating rack; 506. Intermittent gear; 507. Fifth servo motor; 101. Electrical control panel.

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0021] The present invention will be further described in detail with reference to the accompanying drawings.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, this solution provides a sand making machine for construction engineering, including a body 1, a pretreatment mechanism 2, a sand making mechanism 3, a propulsion mechanism 4, and a screening mechanism 5. The pretreatment mechanism 2 is located at the top of the body 1, the sand making mechanism 3 is located on the inner wall of the body 1, the propulsion mechanism 4 is located on the side wall of the body 1, and the screening mechanism 5 is located at the bottom of the body 1. The pretreatment mechanism 2 includes a separation mechanism 210 and a conveying mechanism 220. The separation mechanism 210 is located at the top of the body 1, and the conveying mechanism 220 is located at the bottom of the separation mechanism 210. The sand making mechanism 3 includes a large crushing mechanism 310 and a small crushing mechanism 320. The large crushing mechanism 310 is located on the inner side wall of the body 1, and the small crushing mechanism 320 is located on the inner side wall of the body 1.

[0023] The separation mechanism 210 includes a separation chamber 211, a first servo motor 212, a support frame 213, an upper vibrating rod 214, a lower vibrating rod 215, a vibrating wheel 216, a fixed cylinder 217, a vibrating cylinder 218, and a vibrating groove 219. The separation chamber 211 is fixedly mounted on the top of the machine body 1, the support frame 213 is fixedly mounted on the inner side wall of the separation chamber 211, the first servo motor 212 is fixedly mounted on the top of the support frame 213, and the fixed cylinder 217 is fixedly mounted on the bottom wall of the support frame 213. The upper vibrating rod 214 is rotatably arranged on the side wall of the fixed cylinder 217, the lower vibrating rod 215 is rotatably arranged on the side wall of the fixed cylinder 217, the vibrating cylinder 218 is coaxially rotatably arranged at the output end of the first servo motor 212, the vibrating cylinder 218 is located inside the fixed cylinder 217, the vibrating wheel 216 is rotatably arranged on the side wall of the upper vibrating rod 214 and the lower vibrating rod 215, the vibrating groove 219 is opened in pairs on the outer circumference of the vibrating cylinder 218, and the vibrating wheel 216 is rolled on the inner wall of the vibrating groove 219.

[0024] The large crushing mechanism 310 includes a crushing frame 311, a second servo motor 312, a first gear 313, rotating gear teeth 314, a first rotating disk 315, and a first impeller 316. The crushing frame 311 is fixedly mounted on the inner wall of the machine body 1. The first rotating disk 315 is rotatably mounted on the top of the crushing frame 311 and is annular. The second servo motor 312 is fixedly mounted on the side wall of the crushing frame 311. The first gear 313 is coaxially fixedly mounted on the output end of the second servo motor 312. The rotating gear teeth 314 are arrayed and fixedly mounted on the inner wall of the first rotating disk 315. The first impeller 316 is arrayed and fixedly mounted on the top of the first rotating disk 315.

[0025] The small crushing mechanism 320 includes a fixed frame 321, a third servo motor 322, a second gear 323, a third gear 324, a second rotating disk 325, and a second impeller 326. The fixed frame 321 is fixedly installed on the inner wall of the machine body 1. The second rotating disk 325 is rotatably installed on the top of the fixed frame 321. The third servo motor 322 is fixedly installed on the side wall of the fixed frame 321. The second gear 323 is coaxially fixedly installed on the output end of the third servo motor 322. The bottom end of the third gear 324 is fixedly sleeved on the side wall of the second rotating disk 325. The second impeller 326 is arrayed and fixedly installed on the top of the second rotating disk 325.

[0026] The propulsion mechanism 4 includes a fourth servo motor 401, a rotating groove 402, a fourth gear 403, a pusher gear 404, a rotating chassis 405, and a propulsion impeller 406. The rotating groove 402 is formed on the inner wall of the machine body 1. The fourth servo motor 401 is fixedly mounted on the side wall of the rotating groove 402. The fourth gear 403 is coaxially fixedly mounted on the output end of the fourth servo motor 401. The rotating chassis 405 is rotatably mounted on the side wall of the rotating groove 402. The pusher gear 404 array is fixedly mounted on the outer circumference of the rotating chassis 405. The propulsion impeller 406 array is fixedly mounted on the side wall of the machine body 1.

[0027] The screening mechanism 5 includes a screen trough 501, a screen frame 502, a limiting block 503, a screen 504, a vibrating rack 505, an intermittent gear 506, and a fifth servo motor 507. The screen trough 501 is arrayed at the bottom of the machine body 1. The screen frame 502 is slidably mounted on the side wall of the screen trough 501. The limiting block 503 is fixedly mounted on the top of the screen frame 502 and slides on the side wall of the screen trough 501. The screen 504 is fixedly mounted on the side wall of the screen frame 502. The vibrating rack 505 is fixedly mounted on the side wall of the screen frame 502. The fifth servo motor 507 is fixedly mounted on the side wall of the machine body 1. The intermittent gear 506 is coaxially fixedly mounted on the output end of the fifth servo motor 507.

[0028] The material conveying mechanism 220 includes a feed hopper 221, an auxiliary frame 222, and a conveying pipe 223. The auxiliary frame 222 is fixedly mounted on the bottom wall of the fixed cylinder 217, the feed hopper 221 is fixedly mounted on the bottom end of the auxiliary frame 222, and the conveying pipe 223 is fixedly mounted on the bottom end of the feed hopper 221. The conveying pipe 223 passes through the top end of the crushing frame 311.

[0029] The machine body 1 has an electrical control panel 101 fixedly installed on its side wall. The electrical control panel 101 is electrically connected to the first servo motor 212, the second servo motor 312, the third servo motor 322, the fourth servo motor 401 and the fifth servo motor 507 via wires.

[0030] Among them, the first gear 313 meshes with the rotating gear 314, the second gear 323 meshes with the third gear 324, the fourth gear 403 meshes with the pushing gear 404, and the intermittent gear 506 meshes with the vibrating rack 505.

[0031] The upper vibrating rod 214 and the lower vibrating rod 215 are arranged in a cross pattern, the bottom end of the propulsion impeller 406 is close to the top of the rotating chassis 405, and the side wall of the vibration groove 219 is wavy.

[0032] In practical use, the first servo motor 212, the second servo motor 312, the third servo motor 322 and the fourth servo motor 401 are first controlled by the electrical control panel 101. Then, the user pours the stones into the separation chamber 211. The first servo motor 212 rotates, which causes the vibrating cylinder 218 to rotate. Since the bottom and top walls of the vibrating groove 219 are wavy, the vibrating wheel 216 can move up and down along the bottom wall of the vibrating groove 219, which can drive the upper vibrating rod 214 and the lower vibrating rod 215 to rotate on the side wall of the fixed cylinder 217. The upper vibrating rod 214 and the lower vibrating rod 215 rotate back and forth, which allows the stones falling on their surface to slide down during the vibration. Small stones will fall into the feed hopper and fall directly to the top of the second rotating disk 325 through the conveying pipe 223. Large stones will slide down along the upper vibrating rod and the lower vibrating rod 215 to the top of the first rotating disk 315. The second servo motor 312 rotates, and through the first gear 313 and the rotating gear 314, it can cause the first rotating disk 315 and the first impeller 316 to rotate. This allows large stones falling above the first rotating disk 315 to be thrown out by the first impeller 316 and collide with and break against the side wall of the machine body 1 or other stones. Meanwhile, the third servo motor 322 rotates, and through the third gear 324 and the second gear 323, it can cause the second rotating disk 325 and the second impeller 326 to rotate. This allows small stones falling above the second rotating disk 325 to be thrown out by the second impeller 326 and collide with and break against the side wall of the machine body 1 or other stones. The rotation of the fourth servo motor 401, through the transmission of the fourth gear 403 and the push wheel teeth, causes the rotating chassis 405 to rotate. This allows the crushed stones at the top of the rotating chassis 405 to be guided by the push impeller 406 to move towards the first rotating disk 315, and then fall onto the second rotating disk 325 for secondary crushing. Large stones that are not completely crushed will be impacted by the first impeller 316 and thrown out for further crushing. The rotation of the fifth servo motor 507 causes the intermittent gear to rotate. When the teeth of the intermittent gear rotate to contact the vibrating rack 505, the vibrating rack 505 moves upward, which in turn causes the screen frame 502 to slide upward on the side wall of the screen groove 501. When the teeth of the intermittent gear disengage from the vibrating rack 505, the screen frame 502 will fall downward due to gravity, thus achieving a vertical vibration effect. This allows the crushed stones to be screened. Qualified stones fall below through the screen 504, while incompletely crushed stones fall to the side of the machine body 1 along with the screen 504.

[0033] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0034] The present invention and its embodiments have been described above. This description is not restrictive. The accompanying drawings are only one embodiment of the present invention. The actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A sand making machine for construction engineering, characterized in that: The machine includes a body (1), a pretreatment mechanism (2), a sand making mechanism (3), a propulsion mechanism (4), and a screening mechanism (5). The pretreatment mechanism (2) is located at the top of the body (1), the sand making mechanism (3) is located on the inner wall of the body (1), the propulsion mechanism (4) is located on the side wall of the body (1), and the screening mechanism (5) is located at the bottom of the body (1). The pretreatment mechanism (2) includes a separation mechanism (210) and a conveying mechanism (220). The separation mechanism (210) is located at the top of the body (1), and the conveying mechanism (220) is located at the bottom of the separation mechanism (210). The sand making mechanism (3) includes a large crushing mechanism (310) and a small crushing mechanism (320). The large crushing mechanism (310) is located on the inner side wall of the body (1), and the small crushing mechanism (320) is located on the inner side wall of the body (1). The separation mechanism (210) includes a separation chamber (211), a first servo motor (212), a support frame (213), an upper vibrating rod (214), a lower vibrating rod (215), a vibrating wheel (216), a fixed cylinder (217), a vibrating cylinder (218), and a vibrating groove (219). The separation chamber (211) is fixedly mounted on the top of the machine body (1), the support frame (213) is fixedly mounted on the inner side wall of the separation chamber (211), the first servo motor (212) is fixedly mounted on the top of the support frame (213), and the fixed cylinder (217) is fixedly mounted on the bottom wall of the support frame (213). The upper vibrating rod (214) array is rotatably disposed on the side wall of the fixed cylinder (217), the lower vibrating rod (215) array is rotatably disposed on the side wall of the fixed cylinder (217), the vibrating cylinder (218) is coaxially rotatably disposed on the output end of the first servo motor (212), the vibrating cylinder (218) is located inside the fixed cylinder (217), the vibrating wheel (216) is rotatably disposed on the side walls of the upper vibrating rod (214) and the lower vibrating rod (215), the vibrating groove (219) is opened in pairs on the outer circumference of the vibrating cylinder (218), and the vibrating wheel (216) is rolled on the inner wall of the vibrating groove (219); The propulsion mechanism (4) includes a rotating chassis (405) and a propulsion impeller (406). The upper vibrating rod (214) and the lower vibrating rod (215) are arranged in a cross configuration. The bottom end of the propulsion impeller (406) is close to the top of the rotating chassis (405). The side wall of the vibration groove (219) is wavy.

2. The sand making machine for construction engineering according to claim 1, characterized in that: The large crushing mechanism (310) includes a crushing frame (311), a second servo motor (312), a first gear (313), rotating gear teeth (314), a first rotating disk (315), and a first impeller (316). The crushing frame (311) is fixedly mounted on the inner wall of the machine body (1). The first rotating disk (315) is rotatably mounted on the top of the crushing frame (311). The first rotating disk (315) is in the shape of a ring. The second servo motor (312) is fixedly mounted on the side wall of the crushing frame (311). The first gear (313) is coaxially fixedly mounted on the output end of the second servo motor (312). The rotating gear teeth (314) array is fixedly mounted on the inner wall of the first rotating disk (315). The first impeller (316) array is fixedly mounted on the top of the first rotating disk (315).

3. A sand making machine for construction engineering according to claim 2, characterized in that: The small crushing mechanism (320) includes a fixed frame (321), a third servo motor (322), a second gear (323), a third gear (324), a second rotating disk (325), and a second impeller (326). The fixed frame (321) is fixedly mounted on the inner wall of the machine body (1). The second rotating disk (325) is rotatably mounted on the top of the fixed frame (321). The third servo motor (322) is fixedly mounted on the side wall of the fixed frame (321). The second gear (323) is coaxially fixedly mounted on the output end of the third servo motor (322). The bottom end of the third gear (324) is fixedly sleeved on the side wall of the second rotating disk (325). The second impeller (326) array is fixedly mounted on the top of the second rotating disk (325).

4. A sand making machine for construction engineering according to claim 3, characterized in that: The propulsion mechanism (4) further includes a fourth servo motor (401), a rotating groove (402), a fourth gear (403), and a pusher gear (404). The rotating groove (402) is opened on the inner wall of the body (1). The fourth servo motor (401) is fixedly installed on the side wall of the rotating groove (402). The fourth gear (403) is coaxially fixedly installed on the output end of the fourth servo motor (401). The rotating chassis (405) is rotatably installed on the side wall of the rotating groove (402). The pusher gear (404) array is fixedly installed on the outer circumference of the rotating chassis (405). The pusher impeller (406) array is fixedly installed on the side wall of the body (1).

5. A sand making machine for construction engineering according to claim 4, characterized in that: The screening mechanism (5) includes a screen groove (501), a screen frame (502), a limiting block (503), a screen mesh (504), a vibrating rack (505), an intermittent gear (506), and a fifth servo motor (507). The screen grooves (501) are arrayed at the bottom of the machine body (1). The screen frame (502) is slidably disposed on the side wall of the screen groove (501). The limiting block (503) is fixedly disposed on the top of the screen frame (502) and slides on the side wall of the screen groove (501). The screen mesh (504) is fixedly disposed on the side wall of the screen frame (502). The vibrating rack (505) is fixedly disposed on the side wall of the screen frame (502). The fifth servo motor (507) is fixedly disposed on the side wall of the machine body (1). The intermittent gear (506) is coaxially fixedly disposed at the output end of the fifth servo motor (507).

6. A sand making machine for construction engineering according to claim 5, characterized in that: The material conveying mechanism (220) includes a feed hopper (221), an auxiliary frame (222), and a conveying pipe (223). The auxiliary frame (222) is fixedly mounted on the bottom wall of the fixed cylinder (217). The feed hopper (221) is fixedly mounted on the bottom end of the auxiliary frame (222). The conveying pipe (223) is fixedly mounted on the bottom end of the feed hopper (221). The conveying pipe (223) passes through the top end of the crushing frame (311).

7. A sand making machine for construction engineering according to claim 6, characterized in that: An electrical control panel (101) is fixedly provided on the side wall of the body (1). The electrical control panel (101) is electrically connected to the first servo motor (212), the second servo motor (312), the third servo motor (322), the fourth servo motor (401), and the fifth servo motor (507) through wires.

8. A sand making machine for construction engineering according to claim 7, characterized in that: The first gear (313) meshes with the rotating gear (314), the second gear (323) meshes with the third gear (324), the fourth gear (403) meshes with the pushing gear (404), and the intermittent gear (506) meshes with the vibrating rack (505).

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