Sand and stone grinding and screening device for constructional engineering

Abstract

The utility model relates to the technical field of sandstone grinding and screening devices, in particular to a sandstone grinding and screening device for constructional engineering, which comprises a grinding assembly for grinding sandstone, the grinding assembly comprises a first rectangular frame, two groups of grinding rollers are rotatably mounted in a grinding machine shell, and a rotating shaft is arranged at one end of each grinding roller. The servo motor is fixedly mounted on the upper surface of the first rectangular frame, a driving rotating wheel is arranged at the driving end of the servo motor, a belt is arranged between a driven rotating wheel and the driving rotating wheel, the screening assembly comprises a screening plate, the pneumatic push rod is fixedly mounted on one side of the screening plate, and the U-shaped scraper is fixedly mounted at the driving end of the pneumatic push rod. The U-shaped scraper is slidably mounted on the upper surface of the screen plate, and a guide assembly is arranged at the bottom of the screening assembly. According to the utility model, the servo motor and the pneumatic push rod are matched for use, so that the grinding and screening processes are accurately controlled, unqualified particles are scraped out of the screen plate by sliding on the upper surface of the U-shaped scraper screen plate, and an efficient screening effect is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of sand and stone grinding and screening devices, in particular to a sand and stone grinding and screening device for construction engineering. Background Art

[0002] A construction project refers to an engineering entity formed by the construction of various types of buildings and their ancillary facilities and the installation of supporting lines, pipelines, and equipment. Sand and gravel are commonly used materials for construction projects. They are ground and screened when used to meet the needs of use. When grinding and screening sand and gravel, a sand and gravel grinding and screening machine is used directly for grinding and screening to process the sand and gravel into fine sand. Usually, large particles of sand and gravel are directly added into the equipment, and the equipment is ground. After grinding, a screening machine is used for screening. Finally, the screened large particles of sand and gravel are manually transported to the raw material location.

[0003] For example, a sand and stone grinding and screening device for construction projects disclosed in the Chinese patent with publication number CN220590158U is provided with a grinding roller, a motor, a worm gear, a worm, an electric telescopic rod and a screening mechanism. When in use, the mounting plate is pushed by the electric telescopic rod to change the distance between the two mounting plates to a suitable requirement. The sand and stone material is added to the position between the two grinding rollers, and the grinding rollers are driven to rotate by the motor to realize the grinding operation of the sand and stone. The ground sand and stone are then screened by the screening mechanism, so that grinding and screening can be carried out simultaneously, which facilitates processing and improves processing efficiency.

[0004] After the screening mechanism of the device screens the sand and gravel, unqualified sand and gravel particles will remain on the filter net. Since these particles are large and heavy when piled together, manual pushing and pulling of the vertical plates is not timely and easily cause blockage, which in turn affects the continuity of the grinding work. Utility Model Content

[0005] The utility model aims at the deficiencies of the prior art and provides the following technical solutions:

[0006] A sand and stone grinding and screening device for construction engineering, comprising a grinding assembly for grinding sand and stone, the grinding assembly comprising a first rectangular frame, a grinding machine shell, a grinding roller and a servo motor, the grinding machine shell is fixedly mounted with the upper surface of the first rectangular frame, two groups of the grinding rollers are rotatably mounted inside the grinding machine shell, one end of the grinding roller is provided with a rotating shaft, the rotating shaft penetrates and is installed on the outer wall of the grinding machine shell, the outer sleeve of the rotating shaft is provided with a driven rotating wheel, the servo motor is fixedly mounted on the upper surface of the first rectangular frame, the driving end of the servo motor is provided with an active rotating wheel, a belt is provided between the driven rotating wheel and the active rotating wheel, a screening assembly is provided at the bottom of the grinding assembly, the screening assembly comprises a sieve plate, a pneumatic push rod and a U-shaped scraper, several groups of the sieve plates are sequentially mounted below the grinding machine shell, the pneumatic push rod is fixedly mounted on one side of the sieve plate, the U-shaped scraper is fixedly mounted on the driving end of the pneumatic push rod, the U-shaped scraper is slidably mounted on the upper surface of the sieve plate, a material guide assembly is provided at the bottom of the screening assembly, and bracket legs are welded and installed around the outer side of the first rectangular frame.

[0007] As an improvement of the above technical solution, a feed frame is fixedly installed on the top of the grinding machine shell, a first discharge hopper is fixedly installed on the bottom of the grinding machine shell, a bearing seat is fixedly installed on the other end of the grinding roller, the bearing seat is fixedly installed on the outer wall of the grinding machine shell, and the gears of the grinding roller are staggered.

[0008] As an improvement of the above technical solution, the screening assembly also includes a second rectangular frame, a shock-absorbing spring group, a vertical plate, an L-shaped plate and a first vibration motor, the shock-absorbing spring group is fixedly installed between the vertical plate and the second rectangular frame, the vertical plate is fixedly installed on both sides of the screen plate, a first support column is fixedly installed between the two sides of the vertical plate, a plurality of groups of support plates are fixedly installed between the vertical plates, the support plates are all fixedly installed on the bottom wall of the screen plate, the L-shaped plate is fixedly installed on one side of the second rectangular frame, the fixed end of the pneumatic push rod is fixedly installed on the L-shaped plate, and two groups of the first vibration motors are fixedly installed on the bottom walls at both ends of the vertical plate.

[0009] As an improvement of the above technical solution, the material guide assembly includes an articulated frame, a hook spring, a material guide inclined plate, a mounting seat and a second vibration motor. The articulated frame is welded and installed on both sides of the outer wall of the second rectangular frame, one end of the hook spring is mounted on the inside of the articulated frame, a hook is welded on the outer wall of the material guide inclined plate, the other end of the hook spring is mounted on the hook, the mounting seat is fixedly installed on the bottom wall of the material guide inclined plate, and the second vibration motor is bolted to one side of the mounting seat.

[0010] As an improvement of the above technical solution, the bracket legs are welded and installed on both sides of the outer wall of the first rectangular frame, the upper part of the bracket legs is provided with plug-in columns, the plug-in columns are movably mounted on the vertical plate, and the lower part of the bracket legs is provided with support rods, the support rods are movably mounted on the material guide inclined plate.

[0011] As an improvement of the above technical solution, a second discharge hopper is fixedly mounted on the bottom wall of the second rectangular frame, and the second discharge hopper is located above the material guide inclined plate.

[0012] Beneficial effects of the utility model:

[0013] 1. The utility model realizes precise control of the grinding and screening process through the coordinated use of a servo motor and a pneumatic push rod. The U-shaped scraper at the driving end of the pneumatic push rod slides on the upper surface of the U-shaped scraper screen plate to scrape unqualified particles out of the screen plate, thereby achieving an efficient screening effect. The servo motor drives the grinding roller to rotate and the pneumatic push rod drives the U-shaped scraper to slide, thereby realizing efficient grinding and screening of sand and stone. The automatic control method is adopted to reduce the tediousness and labor intensity of manual operation, and at the same time realizes precise control of the grinding and screening process. By precisely controlling the grinding and screening process, unnecessary waste and energy consumption are reduced, the experimental cost is reduced, and the overall benefit is improved.

[0014] 2. The utility model uses two groups of first vibration motors fixedly installed on the bottom walls at both ends of the vertical plate to generate vibration energy and drive the screen plate for screening. A hook is welded on the outer wall of the material guide inclined plate for hanging and installing with the hook spring to achieve elastic connection of the material guide inclined plate. The mounting seat is fixedly installed on the bottom wall of the material guide inclined plate to fix and support the second vibration motor. The second vibration motor is bolted to one side of the mounting seat to generate vibration energy and drive the material guide inclined plate to vibrate, thereby promoting the smooth outflow of sand and stone particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the overall structure diagram of the utility model;

[0016] Figure 2 This is a structural diagram of the grinding assembly of the utility model;

[0017] Figure 3 This is a structural diagram of the screening component of the utility model;

[0018] Figure 4 This is the internal structure diagram of the screening component of the utility model;

[0019] Figure 5 This is a structural diagram of the material guide component of the utility model.

[0020] 1. Grinding assembly; 11. First rectangular frame; 12. Grinding machine housing; 121. Feed frame; 122. First discharge hopper; 13. Grinding roller; 131. Rotating shaft; 132. Driven rotating wheel; 133. Bearing seat; 14. Servo motor; 141. Active rotating wheel; 15. Belt; 2. Screening assembly; 21. Second rectangular frame; 22. Shock-absorbing spring group; 23. Vertical plate; 231. First support column; 232. Support plate; 24. Screen plate; 25. L-shaped plate; 26. Pneumatic push rod; 27. U-shaped scraper; 28. First vibration motor; 29. ​​Second discharge hopper; 3. Material guide assembly; 31. Articulated frame; 32. Hook spring; 33. Material guide inclined plate; 331. Hook; 34. Mounting seat; 35. Second vibration motor; 4. Bracket leg; 41. Plug column; 42. Support rod. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0022] See also Figure 1-5 , the utility model provides a technical solution:

[0023] A sand and stone grinding and screening device for construction engineering, comprising a grinding assembly 1 for grinding sand and stone, the grinding assembly 1 comprising a first rectangular frame 11, a grinding machine housing 12, a grinding roller 13 and a servo motor 14, the grinding machine housing 12 is fixedly mounted on the upper surface of the first rectangular frame 11, two groups of grinding rollers 13 are rotatably mounted inside the grinding machine housing 12, one end of the grinding roller 13 is provided with a rotating shaft 131, the rotating shaft 131 penetrates and is installed on the outer wall of the grinding machine housing 12, the outer sleeve of the rotating shaft 131 is provided with a driven rotating wheel 132, the servo motor 14 is fixedly mounted on the upper surface of the first rectangular frame 11, and the driving end of the servo motor 14 is provided with a A driving rotating wheel 141 is provided, and a belt 15 is provided between the driven rotating wheel 132 and the driving rotating wheel 141. A screening assembly 2 is provided at the bottom of the grinding assembly 1. The screening assembly 2 includes a screen plate 24, a pneumatic push rod 26 and a U-shaped scraper 27. Several groups of screen plates 24 are installed in sequence below the grinding machine housing 12. The pneumatic push rod 26 is fixedly installed on one side of the screen plate 24. The U-shaped scraper 27 is fixedly installed on the driving end of the pneumatic push rod 26. The U-shaped scraper 27 is slidably installed on the upper surface of the screen plate 24. A material guide assembly 3 is provided at the bottom of the screening assembly 2. Bracket legs 4 are welded and installed around the outer side of the first rectangular frame 11.

[0024] In this embodiment, the prepared sand and stone raw materials are put into the grinding machine shell 12 of the grinding component 1, and the servo motor 14 is started. The motor drives the active rotating wheel 141 to rotate, and then drives the driven rotating wheel 132 to rotate through the belt 15. The rotation of the driven rotating wheel 132 drives the grinding roller 13 to rotate inside the grinding machine shell 12, and starts to squeeze and frictionally grind the sand and stone. According to the required grinding effect, the speed and grinding time of the servo motor 14 can be adjusted. The increase in speed will improve the grinding efficiency, but it may also cause the particles to be too fine; the extension of the grinding time helps to obtain a more uniform grinding effect. The ground sand and stone particles naturally fall to the screening component 2. The screen plate 24 in the screening component 2 has a preset screen hole size. Qualified sand and stone particles will fall through the screen hole, while unqualified larger particles will remain on the upper surface of the screen plate 24. When the grinding is carried out for a certain period of time, or when the larger particles accumulated on the screen plate 24 reach a certain amount, the pneumatic push rod 26 is started, and the driving end of the pneumatic push rod 26 is fixedly installed with a U-shaped The scraper 27 slides on the upper surface of the sieve plate 24 to scrape unqualified particles out of the sieve plate 24, thereby achieving an efficient screening effect. The screened sand and stone particles are guided out of the device through the material guide component 3. The design of the material guide component 3 ensures that the sand and stone particles can leave the device smoothly and orderly, which is convenient for subsequent collection and processing. The entire device adopts an automated control method. The coordinated use of the servo motor 14 and the pneumatic push rod 26 realizes precise control of the grinding and screening process. By adjusting the speed of the servo motor 14 and the thrust of the pneumatic push rod 26, the grinding effect and screening efficiency can be flexibly adjusted. The servo motor 14 drives the grinding roller 13 to rotate and the pneumatic push rod 26 drives the U-shaped scraper 27 to slide, thereby achieving efficient grinding and screening of sand and stone. The automated control method reduces the tediousness and labor intensity of manual operation, and at the same time achieves precise control of the grinding and screening process. By precisely controlling the grinding and screening process, unnecessary waste and energy consumption are reduced, the experimental cost is reduced, and the overall benefit is improved.

[0025] Specifically, a feed frame 121 is fixedly installed on the top of the grinding machine shell 12, a first discharge hopper 122 is fixedly installed on the bottom of the grinding machine shell 12, a bearing seat 133 is fixedly installed on the other end of the grinding roller 13, the bearing seat 133 is fixedly installed on the outer wall of the grinding machine shell 12, and the gears of the grinding roller 13 are staggered.

[0026] In this embodiment, the feed frame 121 is fixedly installed on the top of the grinding machine shell 12, and is used to introduce the sand and stone raw materials to be ground into the grinding machine shell 12. The design of the feed frame 121 should facilitate the uniform delivery of the raw materials to avoid blockage or excessive concentration. The size and shape of the feed frame 121 need to be reasonably designed according to the internal structure of the grinding machine shell 12 and the arrangement of the grinding roller 13 to ensure that the raw materials can smoothly enter the grinding area. The first discharge hopper 122 is fixedly installed at the bottom of the grinding machine shell 12, and is used to export the ground sand and stone particles out of the grinding machine shell 12. The design of the first discharge hopper 122 should facilitate the smooth outflow of the particles to avoid blockage or retention. The outlet size and shape of the first discharge hopper 122 need to be reasonably designed according to the size and shape of the ground particles. The grinding roller 13 is a key component inside the grinding machine housing 12 and is used for extruding and friction grinding the sand and stone raw materials. The two ends of the grinding roller 13 are fixedly installed on the outer wall of the grinding machine housing 12 through the rotating shaft 131 and the bearing seat 133 respectively. The bearing seat 133 is used to support and fix the other end of the grinding roller 13 to ensure the stability and reliability of the grinding roller 13 during the rotation process. The design of the bearing seat 133 needs to consider the weight, rotation speed and working environment of the grinding roller 13. The gears of the grinding roller 13 are installed in a staggered manner. There is a certain amount of misalignment between the gears of the two grinding rollers 13 when they are engaged. The staggered installation can ensure that the grinding roller 13 can produce better grinding effect and more uniform particle distribution during the rotation process.

[0027] Specifically, the screening assembly 2 also includes a second rectangular frame 21, a shock-absorbing spring group 22, a vertical plate 23, an L-shaped plate 25 and a first vibration motor 28. The shock-absorbing spring group 22 is fixedly installed between the vertical plate 23 and the second rectangular frame 21. The vertical plate 23 is fixedly installed on both sides of the screen plate 24. A first support column 231 is fixedly installed between the two sides of the vertical plate 23. Several groups of support plates 232 are fixedly installed between the vertical plates 23. The support plates 232 are all fixedly installed on the bottom wall of the screen plate 24. The L-shaped plate 25 is fixedly installed on one side of the second rectangular frame 21. The fixed end of the pneumatic push rod 26 is fixedly installed on the L-shaped plate 25. Two groups of first vibration motors 28 are fixedly installed on the bottom walls at both ends of the vertical plate 23.

[0028] In this embodiment, the second rectangular frame 21 serves as the main supporting structure of the screening assembly 2 and is fixedly installed under the grinding machine housing 12 for support. The shock-absorbing spring group 22 is fixedly installed between the vertical plate 23 and the second rectangular frame 21 to reduce the vibration and noise generated during the screening process and protect the screening assembly 2 and its surrounding equipment from damage. The vertical plate 23 is fixedly installed on both sides of the screen plate 24 to support the screen plate 24 and transmit vibration energy. The design of the vertical plate 23 needs to have a certain rigidity and stability to ensure the smooth progress of the screening process. A first support column 231 is fixedly installed between the two sides of the vertical plate 23 to enhance the connection and stability between the vertical plates 23. The support plate 232 is fixedly installed between the vertical plates 23 and is fixedly installed on the bottom wall of the sieve plate 24 to further support the sieve plate 24 and disperse the vibration energy. The design of the support plate 232 needs to be closely matched with the sieve plate 24 to ensure the screening effect. The sieve plate 24 is the core component of the screening assembly 2 and has a preset sieve hole size for screening the ground sand and stone particles. The material and sieve hole size of the sieve plate 24 need to be selected and designed according to actual needs. The molded plate 25 is fixedly mounted on one side of the second rectangular frame 21, and is used to fix the fixed end of the pneumatic push rod 26. The design of the L-shaped plate 25 needs to facilitate the installation and fixation of the pneumatic push rod 26, while ensuring its stability and reliability during operation. The fixed end of the pneumatic push rod 26 is fixedly mounted on the L-shaped plate 25, and its movable end is connected to the U-shaped scraper 27, which is used to scrape unqualified particles on the screen plate 24 during the screening process. Two groups of first vibration motors 28 are fixedly mounted on the bottom walls at both ends of the vertical plate 23, and are used to generate vibration energy to drive the screen plate 24 for screening. The selection and installation of the first vibration motor 28 need to consider parameters such as its vibration frequency, amplitude and power to ensure the screening effect and efficiency.

[0029] Specifically, the material guide assembly 3 includes an articulated frame 31, a hook spring 32, a material guide inclined plate 33, a mounting seat 34 and a second vibration motor 35. The articulated frame 31 is welded and installed on both sides of the outer wall of the second rectangular frame 21. One end of the hook spring 32 is mounted on the inside of the articulated frame 31. A hook 331 is welded on the outer wall of the material guide inclined plate 33. The other end of the hook spring 32 is mounted on the hook 331. The mounting seat 34 is fixedly installed on the bottom wall of the material guide inclined plate 33. The second vibration motor 35 is bolted to one side of the mounting seat 34.

[0030] In this embodiment, the hinge frame 31 is welded and installed on both sides of the outer wall of the second rectangular frame 21, as a support and connection structure of the guide inclined plate 33, the design of the hinge frame 31 needs to have a certain rigidity and stability to ensure the stability and reliability of the guide inclined plate 33 during operation, one end of the hook spring 32 is mounted on the inside of the hinge frame 31, and the other end is mounted on the hook 331 welded on the outer wall of the guide inclined plate 33. The design of the hook spring 32 makes the guide inclined plate 33 have a certain elasticity and buffering capacity, which can reduce vibration and impact during the screening process, and is convenient for the guide inclined plate 33 Adjustment and maintenance, the guide inclined plate 33 is used to guide the screened sand and stone particles from the screening component 2 to the next process or collection equipment, the guide inclined plate 33 has a certain inclination angle, and the outer wall of the guide inclined plate 33 is welded with a hook 331, which is used to hang and install with the hook spring 32 to achieve elastic connection of the guide inclined plate 33, and the mounting seat 34 is fixedly installed on the bottom wall of the guide inclined plate 33, and is used to fix and support the second vibration motor 35. The second vibration motor 35 is bolted to one side of the mounting seat 34, and is used to generate vibration energy to drive the guide inclined plate 33 to vibrate and promote the smooth outflow of sand and stone particles.

[0031] Specifically, the bracket leg 4 is welded and installed on both sides of the outer wall of the first rectangular frame 11, and a plug-in column 41 is provided on the upper part of the bracket leg 4, and the plug-in column 41 is movably mounted on the vertical plate 23, and a support rod 42 is provided on the lower part of the bracket leg 4, and the support rod 42 is movably mounted on the material guide inclined plate 33.

[0032] In this embodiment, the support legs 4 are welded and installed on both sides of the outer wall of the first rectangular frame 11, the plug-in columns 41 are arranged at the upper part of the support legs 4, and are movably mounted with the vertical plate 23, so that the screening assembly 2 can be adjusted up and down within a certain range to adapt to the grinding machine housing 12 of different heights, and the support rod 42 is arranged at the lower part of the support legs 4, and is movably mounted with the material guide inclined plate 33, so that the material guide inclined plate 33 can be adjusted forward and backward or up and down within a certain range to adapt to the collection equipment of different heights or adjust the material guide angle, thereby ensuring that the sand and stone particles can flow out smoothly and fall into the collection equipment.

[0033] Specifically, a second discharge hopper 29 is fixedly mounted on the bottom wall of the second rectangular frame 21 , and the second discharge hopper 29 is located above the material guiding inclined plate 33 .

[0034] In this embodiment, the second discharge hopper 29 is fixedly mounted on the bottom wall of the second rectangular frame 21, above the guide ramp 33. As a part of the screening assembly 2, the main function of the second discharge hopper 29 is to discharge the qualified sand and gravel particles after screening to the guide ramp 33, and then flow out through the guide ramp 33 to the next process or collection equipment. The position design of the second discharge hopper 29 ensures that the qualified particles after screening can fall into it smoothly, avoiding the accumulation and blockage of particles.

[0035] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. A sand and stone grinding and screening device for construction engineering, characterized in that: The invention comprises a grinding assembly (1) for grinding sand and stone, wherein the grinding assembly (1) comprises a first rectangular frame (11), a grinding machine housing (12), a grinding roller (13) and a servo motor (14); the grinding machine housing (12) is fixedly mounted on the upper surface of the first rectangular frame (11); two groups of grinding rollers (13) are rotatably mounted inside the grinding machine housing (12); a rotating shaft (131) is provided at one end of the grinding roller (13); the rotating shaft (131) penetrates and is mounted on the outer wall of the grinding machine housing (12); a driven rotating wheel (132) is sleeved on the outer side of the rotating shaft (131); the servo motor (14) is fixedly mounted on the upper surface of the first rectangular frame (11); and a driving rotating wheel (141) is provided at the driving end of the servo motor (14). A belt (15) is arranged between the driven rotating wheel (132) and the driving rotating wheel (141); a screening assembly (2) is arranged at the bottom of the grinding assembly (1); the screening assembly (2) comprises a screening plate (24), a pneumatic push rod (26) and a U-shaped scraper (27); a plurality of groups of the screening plates (24) are sequentially mounted below the grinding machine housing (12); the pneumatic push rod (26) is fixedly mounted on one side of the screening plate (24); the U-shaped scraper (27) is fixedly mounted on the driving end of the pneumatic push rod (26); the U-shaped scraper (27) is slidably mounted on the upper surface of the screening plate (24); a material guide assembly (3) is arranged at the bottom of the screening assembly (2); bracket legs (4) are welded and mounted on the outer sides of the first rectangular frame (11).

2. The sand and stone grinding and screening device for construction engineering according to claim 1 is characterized in that: A feed frame (121) is fixedly mounted on the top of the grinding machine housing (12), a first discharge hopper (122) is fixedly mounted on the bottom of the grinding machine housing (12), a bearing seat (133) is fixedly mounted on the other end of the grinding roller (13), the bearing seat (133) is fixedly mounted on the outer wall of the grinding machine housing (12), and the gears of the grinding roller (13) are staggeredly mounted.

3. The sand and stone grinding and screening device for construction engineering according to claim 1 is characterized in that: The screening assembly (2) further comprises a second rectangular frame (21), a shock absorbing spring group (22), a vertical plate (23), an L-shaped plate (25) and a first vibration motor (28); the shock absorbing spring group (22) is fixedly installed between the vertical plate (23) and the second rectangular frame (21); the vertical plate (23) is fixedly installed on both sides of the sieve plate (24); a first support column (231) is fixedly installed between the two sides of the vertical plate (23); a plurality of groups of support plates (232) are fixedly installed between the vertical plates (23); the support plates (232) are all fixedly installed on the bottom wall of the sieve plate (24); the L-shaped plate (25) is fixedly installed on one side of the second rectangular frame (21); the fixed end of the pneumatic push rod (26) is fixedly installed on the L-shaped plate (25); and two groups of the first vibration motors (28) are fixedly installed on the bottom walls at both ends of the vertical plate (23).

4. The sand and stone grinding and screening device for construction engineering according to claim 1 is characterized in that: The material guide assembly (3) comprises an articulated frame (31), a hook spring (32), a material guide inclined plate (33), a mounting seat (34) and a second vibration motor (35); the articulated frame (31) is welded and mounted on both sides of the outer wall of the second rectangular frame (21); one end of the hook spring (32) is mounted and mounted inside the articulated frame (31); a hook (331) is welded to the outer wall of the material guide inclined plate (33); the other end of the hook spring (32) is mounted and mounted and mounted and mounted on the hook (331); the mounting seat (34) is fixedly mounted on the bottom wall of the material guide inclined plate (33); and the second vibration motor (35) is bolted and mounted on one side of the mounting seat (34).

5. The sand and stone grinding and screening device for construction engineering according to claim 1 is characterized in that: The support legs (4) are welded and mounted on both sides of the outer wall of the first rectangular frame (11); a plug-in column (41) is arranged on the upper part of the support legs (4); the plug-in column (41) is movably mounted on the vertical plate (23); a support rod (42) is arranged on the lower part of the support legs (4); the support rod (42) is movably mounted on the material guide inclined plate (33).

6. The sand and stone grinding and screening device for construction engineering according to claim 3 is characterized by: A second discharge hopper (29) is fixedly mounted on the bottom wall of the second rectangular frame (21), and the second discharge hopper (29) is located above the material guide inclined plate (33).

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