Sand screening equipment for constructional engineering

Abstract

According to the sand screening equipment for constructional engineering, a stirring roller is arranged in the left-right direction and located in the lower portion of a feeding hopper, and the right end of the stirring roller is rotationally connected with the inner side wall of the lower portion of the feeding hopper in the left-right direction; the left end of the stirring roller penetrates through the side wall of the lower portion of the feeding hopper in the left-right direction, can rotate in the left-right direction relative to the side wall of the lower portion of the feeding hopper and is exposed on the left side of the lower portion of the feeding hopper, and the installation cover is located on the left side of the lower portion of the feeding hopper, connected with the lower portion of the feeding hopper and arranged outside the left end of the stirring roller in a covering mode. The driving device is mounted on the mounting cover, connected with the left end of the stirring roller and used for driving the stirring roller to rotate in the left-right direction, and the screening filter screen is located below the lower portion of the feeding hopper. The sand screening device has a good screening effect on hardened or moist bonded and clustered sand, the screen is not prone to being blocked, the sand screening precision is improved, and it is guaranteed that the sand is fully used in constructional engineering.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to the technical field of sand screening, and specifically refers to sand screening equipment for construction engineering. Background Art

[0002] Construction projects refer to the planning, investigation, design, construction, completion and other technical work and completed engineering entities for the construction, reconstruction or expansion of buildings and ancillary structures and facilities, as well as the installation of supporting lines, pipelines and equipment.

[0003] In construction projects, concrete is often needed, and sand is one of the main fillers in concrete. It can fill the gaps between cement and gravel, reduce the porosity in concrete, and thus improve the strength and stability of concrete. During the hardening process of concrete, cement will shrink due to water evaporation and chemical reactions. The addition of sand can slow down the shrinkage rate of concrete and avoid problems such as cracking and breakage of concrete due to shrinkage.

[0004] For example, a Chinese utility model patent (authorization announcement number CN217989990U) discloses a sand screening device for construction projects, including a base plate, a bracket fixedly connected to the outside of the base plate, a shell fixedly connected to the top of the bracket, a motor fixedly connected to the outside of the shell, an auger fixedly connected to the outside of the motor, a heating plate provided on the inner side of the shell, a conveyor belt fixedly connected to the outside of the bracket, a support plate fixedly connected to the outside of the base plate, a limit rod fixedly connected to the inside of the support plate, a slider slidably connected to the outside of the limit rod, a screen fixedly connected to the outside of the slider, a vibrator fixedly connected to the bottom of the screen, a spring fixedly connected to the outside of the slider, and a collecting box provided on the inner side of the support plate. This sand screening device for construction projects avoids the problem of sand clogging the screen, and also avoids the problem that when the sand is relatively damp, it will not all slide down when it falls on the receiving plate, and sometimes manual scraping is required.

[0005] However, when the sand screening equipment for construction projects is used, the sand is often screened directly, which has a poor screening effect on sand that is compacted into blocks or wet and sticky together, and is easy to clog the screen, affecting the sand screening accuracy and the full use of sand in construction projects.

[0006] Therefore, it is hoped to provide a sand screening device for construction projects, which has a good screening effect on sand that is compacted into blocks or wet and sticky, is not easy to clog the screen, improves the sand screening accuracy, and ensures full use of sand in construction projects. Utility Model Content

[0007] In order to overcome the shortcomings of the above-mentioned prior art, one purpose of the utility model is to provide a sand screening equipment for construction projects, which has good screening effect on sand that is compacted into blocks or wet and sticky, is not easy to clog the screen, improves the sand screening accuracy, ensures the full use of sand in construction projects, and is suitable for large-scale promotion and application.

[0008] In order to achieve the above purpose, the utility model provides a sand screening device for construction engineering, including a frame, a feed hopper, a screening filter and a storage frame, the frame and the feed hopper are both arranged vertically, the lower part of the feed hopper is vertically inserted into the top of the frame, the screening filter is arranged along the front-to-back direction and is arranged in the frame in an inclined manner toward the lower right from left to right, the storage frame is arranged horizontally and along the front-to-back direction, the storage frame is placed in the frame and is located below the screening filter, and is characterized in that the sand screening device for construction engineering also includes a mounting cover, a stirring roller and a driving device, wherein:

[0009] The stirring roller is arranged along the left-right direction and is located in the lower part of the feed hopper, the right end of the stirring roller is rotatable about the left-right direction and is connected to the inner side wall of the lower part of the feed hopper, the left end of the stirring roller passes through the side wall of the lower part of the feed hopper along the left-right direction and is rotatable about the left-right direction relative to the side wall of the lower part of the feed hopper and is exposed on the left side of the lower part of the feed hopper, the mounting cover is located on the left side of the lower part of the feed hopper and is connected to the lower part of the feed hopper and is covered outside the left end of the stirring roller, the driving device is installed on the mounting cover and connected to the left end of the stirring roller for driving the stirring roller to rotate about the left-right direction, and the screening filter is located below the lower part of the feed hopper.

[0010] Preferably, the number of the stirring rollers is 2, and the 2 stirring rollers are spaced apart from each other front to back, and the driving device includes a driving motor, a driving gear and a connecting gear, the driving motor is located on the left side of the mounting cover and is mounted on the mounting cover, the driving shaft of the driving motor is arranged along the left-right direction and passes through the mounting cover along the left-right direction and is connected to the left end of the stirring roller located in the front for driving the stirring roller located in the front to rotate around the left-right direction, the driving gear and the connecting gear are both arranged vertically and along the front-to-back direction and are meshed with each other front to back, and the driving gear and the connecting gear are both located in the mounting cover and are respectively sleeved on the left end of the stirring roller located in the front and the left end of the stirring roller located in the back.

[0011] Preferably, the mounting cover is a U-shaped cover, the U-shaped cover is arranged vertically and along the front-rear direction, and the opening of the U-shaped cover is arranged to face right.

[0012] Preferably, the sand screening equipment for construction projects also includes a telescopic device and a telescopic baffle, the telescopic baffle is horizontally arranged and movably inserted in the lower part of the feed hopper along the left-right direction and is located below the stirring roller, the telescopic device is installed on the frame and is located on the left side of the telescopic baffle and is connected to the telescopic baffle for telescoping the telescopic baffle along the left-right direction to open and close the lower part of the feed hopper.

[0013] More preferably, the telescopic device is an electric push rod.

[0014] More preferably, a telescopic groove is provided at the lower portion of the feed hopper along the left-right direction, and the telescopic baffle is movably inserted in the telescopic groove along the left-right direction.

[0015] Preferably, the sand screening equipment for construction engineering further comprises a filter frame, which is arranged horizontally and along the front-rear direction, and the filter frame is placed in the frame and is located to the right of the right end of the screening filter.

[0016] Preferably, the sand screening equipment for construction projects also includes a scraper and a scraper moving device, the scraper is arranged along the front-to-back direction and is movably arranged on the screening filter along the inclination direction of the screening filter, and the scraper moving device is installed on the screening filter and connected to the scraper for driving the scraper to move along the inclination direction of the screening filter.

[0017] More preferably, the scraper moving device includes a left fixed block, a right fixed block, a threaded rod and a knob, the left fixed block and the right fixed block are respectively arranged on the rear of the left end and the rear of the right end of the screening filter, the threaded rod is arranged along the inclination direction of the screening filter and is located between the left fixed block and the right fixed block, the right end of the threaded rod is rotatably connected to the right fixed block around the inclination direction of the screening filter, the left end of the threaded rod passes through the left fixed block along the inclination direction of the screening filter and is rotatably arranged relative to the left fixed block around the inclination direction of the screening filter and is exposed to the left side of the left fixed block, the knob is located to the left of the left end of the threaded rod and is connected to the left end of the threaded rod, and the rear end of the scraper is located between the left fixed block and the right fixed block and is sleeved and threadedly engaged with the threaded rod.

[0018] More preferably, the sand screening equipment for construction projects also includes a front sliding block and a rear sliding block, the top of the front side and the top of the rear side of the screening filter are respectively provided with a front slide groove and a rear slide groove along the inclination direction of the screening filter, the front sliding block and the rear sliding block are respectively movably arranged in the front slide groove and the rear slide groove along the inclination direction of the screening filter, the front end and the rear end of the scraper are respectively located on the front sliding block and the rear sliding block and are respectively connected to the front sliding block and the rear sliding block.

[0019] The beneficial effects of the utility model are mainly:

[0020] 1. The stirring roller of the sand screening equipment for construction engineering of the utility model is arranged along the left-right direction and is located in the lower part of the feed hopper, the right end of the stirring roller is rotatable around the left-right direction and connected to the inner side wall of the lower part of the feed hopper, the left end of the stirring roller penetrates the side wall of the lower part of the feed hopper along the left-right direction and is rotatable around the left-right direction relative to the side wall of the lower part of the feed hopper and is exposed at the left side of the lower part of the feed hopper, the mounting cover is located at the left side of the lower part of the feed hopper and is connected to the lower part of the feed hopper and the cover is arranged outside the left end of the stirring roller, the driving device is installed on the mounting cover and connected to the left end of the stirring roller for driving the stirring roller to rotate around the left-right direction, the screening filter is located below the lower part of the feed hopper, therefore, it has a good screening effect on sand that is caked or wet and bonded into agglomerates, is not easy to clog the screen, improves the sand screening accuracy, ensures the full use of sand in construction projects, and is suitable for large-scale promotion and application.

[0021] 2. The sand screening equipment for construction projects of the utility model also includes a telescopic device and a telescopic baffle. The telescopic baffle is horizontally arranged and movably inserted in the lower part of the feed hopper in the left-right direction and is located below the stirring roller. The telescopic device is installed on the frame and is located on the left side of the telescopic baffle and is connected to the telescopic baffle for telescoping the telescopic baffle in the left-right direction to open and close the lower part of the feed hopper. Through the telescopic device and the telescopic baffle, the opening and closing degree of the lower part of the feed hopper can be adjusted, thereby realizing the control operation of conveniently adjusting the sand discharge amount.

[0022] 3. The sand screening equipment for construction engineering of the utility model also includes a scraper and a scraper moving device. The scraper is arranged along the front-to-back direction and can be movably arranged on the screening filter along the inclination direction of the screening filter. The scraper moving device is installed on the screening filter and connected to the scraper to drive the scraper to move along the inclination direction of the screening filter. Therefore, the scraper and the scraper moving device can effectively clean up the sand and sand impurities with larger particle sizes accumulated on the surface of the screening filter, thereby preventing congestion on the surface of the screening filter and affecting the subsequent screening effect of the sand.

[0023] These and other objects, features and advantages of the present invention are fully reflected in the following detailed description and drawings, and can be achieved by the means, devices and their combinations specifically pointed out in the content of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional schematic diagram of a specific embodiment of the utility model of a sand screening device for construction engineering Figure 1 .

[0025] Figure 2 yes Figure 1The three-dimensional schematic diagram of the specific embodiment shown Figure 2 .

[0026] Figure 3 yes Figure 1 The schematic perspective view of the feed hopper, mounting cover, stirring roller and drive device assembly of the specific embodiment shown.

[0027] Figure 4 yes Figure 1 The schematic three-dimensional diagram of the assembly of the lower part of the feed hopper, the telescopic device and the telescopic baffle of the specific embodiment shown.

[0028] Figure 5 yes Figure 1 The illustrated embodiment is a perspective schematic diagram of the components of the screening screen, the scraper and the scraper moving device.

[0029] (Explanation of symbols)

[0030] 1 frame; 2 feed hopper; 3 screening filter; 4 storage frame; 5 installation cover; 6 stirring roller; 7 driving device; 8 driving motor; 9 driving gear; 10 connecting gear; 11 telescopic device; 12 telescopic baffle; 13 telescopic slot; 14 filter frame; 15 scraper; 16 scraper moving device; 17 left fixed block; 18 right fixed block; 19 threaded rod; 20 knob; 21 front slider; 22 rear slider; 23 front slide; 24 rear slide. DETAILED DESCRIPTION

[0031] In order to more clearly understand the technical content of the present invention, the following embodiments are given in detail.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0033] See also Figure 1 to Figure 5 As shown, in a specific embodiment of the utility model, the sand screening equipment for construction engineering of the utility model includes a frame 1, a feed hopper 2, a screening filter 3, a storage frame 4, a mounting cover 5, a stirring roller 6 and a driving device 7, wherein:

[0034] The frame 1 and the feed hopper 2 are both arranged vertically, the lower part of the feed hopper 2 is vertically inserted into the top of the frame 1, the screening filter 3 is arranged along the front-to-back direction and is arranged in the frame 1 in an inclined manner from left to right toward the lower right, the storage frame 4 is arranged horizontally and arranged along the front-to-back direction, and the storage frame 4 is placed in the frame 1 and is located below the screening filter 3;

[0035] The stirring roller 6 is arranged along the left-right direction and is located in the lower part of the feed hopper 2. The right end of the stirring roller 6 is rotatably connected to the inner side wall of the lower part of the feed hopper 2 around the left-right direction. The left end of the stirring roller 6 passes through the side wall of the lower part of the feed hopper 2 along the left-right direction and is rotatably arranged around the left-right direction relative to the side wall of the lower part of the feed hopper 2 and is exposed on the left side of the lower part of the feed hopper 2. The mounting cover 5 is located on the left side of the lower part of the feed hopper 2 and is connected to the lower part of the feed hopper 2 and is covered outside the left end of the stirring roller 6. The driving device 7 is installed on the mounting cover 5 and connected to the left end of the stirring roller 6 for driving the stirring roller 6 to rotate around the left-right direction. The screening filter 3 is located below the lower part of the feed hopper 2.

[0036] The number of the stirring rollers 6 can be determined as needed. Preferably, the number of the stirring rollers 6 is multiple, and the multiple stirring rollers 6 are arranged at intervals from front to back. The above "multiple" refers to more than 2, see Figure 3 As shown, in a specific embodiment of the utility model, the number of the stirring rollers 6 is 2, and the 2 stirring rollers 6 are arranged at an interval from front to back. The driving device 7 includes a driving motor 8, a driving gear 9 and a connecting gear 10. The driving motor 8 is located on the left side of the mounting cover 5 and is installed on the mounting cover 5. The driving shaft of the driving motor 8 is arranged along the left-right direction and penetrates the mounting cover 5 along the left-right direction and is connected to the left end of the stirring roller 6 located in the front to drive the stirring roller 6 located in the front to rotate around the left-right direction. The driving gear 9 and the connecting gear 10 are both arranged vertically and are both arranged along the front-to-back direction and are meshed with each other from front to back. The driving gear 9 and the connecting gear 10 are both located in the mounting cover 5 and are respectively sleeved on the left end of the stirring roller 6 located in the front and the left end of the stirring roller 6 located in the back.

[0037] With the above arrangement, the driving motor 8 drives the stirring roller 6 located in the front to rotate around the left and right directions, driving the driving gear 9 to rotate around the left and right directions, and then causing the connecting gear 10 to rotate around the left and right directions, and finally driving the stirring roller 6 located at the back to rotate around the left and right directions, but in the opposite direction to the stirring roller 6 located in the front.

[0038] The driving motor 8 can be any suitable motor. In a specific embodiment of the present invention, the driving motor 8 is a servo motor.

[0039] The mounting cover 5 may have any suitable shape, see Figure 1 and Figure 3 As shown, in a specific embodiment of the present utility model, the mounting cover 5 is a U-shaped cover, the U-shaped cover is vertically arranged and arranged along the front-to-back direction, and the opening of the U-shaped cover is arranged to the right.

[0040] The sand screening equipment for construction engineering may also include any other suitable components, see Figure 1 and Figure 4 As shown, in a specific embodiment of the utility model, the sand screening equipment for construction engineering also includes a telescopic device 11 and a telescopic baffle 12, the telescopic baffle 12 is horizontally arranged and movably inserted in the lower part of the feed hopper 2 along the left-right direction and is located below the stirring roller 6, the telescopic device 11 is installed on the frame 1 and is located on the left side of the telescopic baffle 12 and is connected to the telescopic baffle 12 for telescoping the telescopic baffle 12 along the left-right direction to open and close the lower part of the feed hopper 2.

[0041] With the above arrangement, the telescopic baffle 12 is extended and retracted along the left and right direction by the telescopic device 11, thereby opening and closing the lower part of the feed hopper 2, and the degree of opening and closing of the lower part of the feed hopper 2 can be adjusted, thereby playing a role in adjusting the sand discharge amount of the lower part of the feed hopper 2, thereby realizing a control operation for convenient adjustment of the sand discharge amount.

[0042] The telescopic device 11 can be any suitable telescopic device. In a specific embodiment of the present invention, the telescopic device 11 is an electric push rod.

[0043] The telescopic baffle 12 is movably inserted in the lower part of the feed hopper 2 along the left-right direction, and can adopt any suitable structure, see Figure 1 to Figure 4 As shown, in a specific embodiment of the present utility model, a telescopic groove 13 is provided at the lower portion of the feed hopper 2 along the left-right direction, and the telescopic baffle 12 is movably inserted in the telescopic groove 13 along the left-right direction.

[0044] The sand screening equipment for construction engineering may also include any other suitable components, see Figure 1-2 As shown, in a specific embodiment of the utility model, the sand screening equipment for construction engineering also includes a filter frame 14, which is horizontally arranged and arranged along the front-to-back direction. The filter frame 14 is placed in the frame 1 and is located to the right of the right end of the screening filter 3.

[0045] The sand screening equipment for construction engineering may also include any other suitable components, see Figure 1-2 and Figure 5 As shown, in a specific embodiment of the utility model, the sand screening equipment for construction engineering also includes a scraper 15 and a scraper moving device 16, the scraper 15 is arranged along the front-to-back direction and is movably arranged on the screening filter 3 along the inclined direction of the screening filter 3, and the scraper moving device 16 is installed on the screening filter 3 and connected to the scraper 15 for driving the scraper 15 to move along the inclined direction of the screening filter 3.

[0046] With the above arrangement, the scraper 15 is driven to move along the inclined direction of the screening filter 3 by the scraper moving device 16, so that the sand and sand impurities with larger particle sizes retained on the screening filter 3 can be pushed toward the right end of the screening filter 3.

[0047] The scraper moving device 16 can have any suitable structure, see Figure 1-2 and Figure 5 As shown, in a specific embodiment of the utility model, the scraper moving device 16 includes a left fixed block 17, a right fixed block 18, a threaded rod 19 and a knob 20, the left fixed block 17 and the right fixed block 18 are respectively arranged on the rear part of the left end and the rear part of the right end of the screening filter 3, the threaded rod 19 is arranged along the inclination direction of the screening filter 3 and is located between the left fixed block 17 and the right fixed block 18, and the right end of the threaded rod 19 is rotatably connected around the inclination direction of the screening filter 3 The right fixed block 18, the left end of the threaded rod 19 passes through the left fixed block 17 along the inclination direction of the screening filter 3 and is rotatable relative to the left fixed block 17 around the inclination direction of the screening filter 3 and is exposed on the left side of the left fixed block 17, the knob 20 is located to the left of the left end of the threaded rod 19 and connected to the left end of the threaded rod 19, and the rear end of the scraper 15 is located between the left fixed block 17 and the right fixed block 18 and is sleeved and threadedly engaged with the threaded rod 19.

[0048] With the above arrangement, by rotating the knob 20 around the tilting direction of the screening screen 3, the threaded rod 19 is rotated around the tilting direction of the screening screen 3, thereby causing the rear end of the scraper 15 located thereon to move along the tilting direction of the screening screen 3, and finally causing the entire scraper 15 to move along the tilting direction of the screening screen 3. Thus, the sand and sand impurities with larger particle sizes accumulated on the surface of the screening screen 3 can be effectively cleaned, preventing the surface of the screening screen 3 from being blocked, thereby affecting the subsequent screening effect of the sand.

[0049] The scraper 15 is movably arranged on the screening screen 3 along the inclination direction of the screening screen 3, and can adopt any suitable structure, see Figure 5 As shown, in a specific embodiment of the utility model, the sand screening equipment for construction engineering also includes a front slider 21 and a rear slider 22, and the top of the front side and the top of the rear side of the screening filter 3 are respectively provided with a front slide groove 23 and a rear slide groove 24 along the inclination direction of the screening filter 3, and the front slider 21 and the rear slider 22 are respectively movably arranged in the front slide groove 23 and the rear slide groove 24 along the inclination direction of the screening filter 3, and the front end and the rear end of the scraper 15 are respectively located on the front slider 21 and the rear slider 22 and are respectively connected to the front slider 21 and the rear slider 22.

[0050] When in use, sand is fed into the feed hopper 2, and the driving device 7 drives the stirring roller 6 to rotate in the left and right directions, so that the sand that is caked or wet and sticky is stirred and crushed, and then the sand falls onto the screening filter 3. Sand with smaller particles passes through the screening filter 3 and falls into the storage frame 4. Sand with larger particles and sand impurities roll down along the inclined direction of the screening filter 3 (in the presence of a scraper 15 and a scraper moving device 16, the scraper 15 can be used to scrape off sand with larger particles and sand impurities), and finally falls into the filter frame 14.

[0051] Therefore, by adopting the utility model, the sand that is caked into blocks or wet and sticky together can be stirred and crushed through the stirring roller and the driving device, and then screened through the screening filter, the screening effect is good, the screening filter is not easy to be blocked, and the sand screening accuracy is improved; the sand discharge amount at the bottom of the feed hopper can be adjusted through the telescopic device and the telescopic baffle; the sand and sand impurities with larger particle sizes accumulated on the surface of the screening filter can be effectively cleaned through the scraper and the scraper moving device, to prevent congestion on the surface of the screening filter and affect the subsequent screening effect of the sand.

[0052] In summary, the sand screening equipment for construction projects of the utility model has good screening effect for sand that is compacted into blocks or wet and sticky, is not easy to clog the screen, improves the sand screening accuracy, ensures full use of sand in construction projects, and is suitable for large-scale promotion and application.

[0053] It can be seen that the purpose of the utility model has been completely and effectively achieved. The function and structural principle of the utility model have been demonstrated and explained in the embodiments. Without departing from the principles, the implementation methods can be modified arbitrarily. Therefore, the utility model includes all modified implementation methods based on the spirit and scope of the claims.

Claims

1. A sand screening device for construction engineering, comprising a frame, a feed hopper, a screening filter and a storage frame, wherein the frame and the feed hopper are both arranged vertically, the lower part of the feed hopper is vertically inserted into the top of the frame, the screening filter is arranged along the front-to-back direction and is arranged in the frame in an inclined manner toward the lower right from left to right, the storage frame is arranged horizontally and along the front-to-back direction, the storage frame is placed in the frame and is located below the screening filter, and is characterized in that: The sand screening equipment for construction engineering also includes a mounting cover, a stirring roller and a driving device, wherein: The stirring roller is arranged along the left-right direction and is located in the lower part of the feed hopper, the right end of the stirring roller is rotatably connected to the inner side wall of the lower part of the feed hopper around the left-right direction, the left end of the stirring roller passes through the side wall of the lower part of the feed hopper along the left-right direction and is rotatably arranged relative to the side wall of the lower part of the feed hopper around the left-right direction and is exposed on the left side of the lower part of the feed hopper, the mounting cover is located on the left side of the lower part of the feed hopper and is connected to the lower part of the feed hopper and is covered outside the left end of the stirring roller, the driving device is installed on the mounting cover and connected to the left end of the stirring roller for driving the stirring roller to rotate around the left-right direction, and the screening filter is located below the lower part of the feed hopper; The sand screening equipment for construction projects also includes a scraper and a scraper moving device. The scraper is arranged along the front-to-back direction and is movably arranged on the screening filter along the inclination direction of the screening filter. The scraper moving device is installed on the screening filter and connected to the scraper to drive the scraper to move along the inclination direction of the screening filter.

2. The sand screening equipment for construction engineering as claimed in claim 1, characterized in that: The number of the stirring rollers is 2, and the 2 stirring rollers are spaced apart from each other front to back. The driving device includes a driving motor, a driving gear and a connecting gear. The driving motor is located on the left side of the mounting cover and is mounted on the mounting cover. The driving shaft of the driving motor is arranged along the left-right direction and passes through the mounting cover along the left-right direction and is connected to the left end of the stirring roller located in the front to drive the stirring roller located in the front to rotate around the left-right direction. The driving gear and the connecting gear are both arranged vertically and along the front-back direction and are meshed with each other front to back. The driving gear and the connecting gear are both located in the mounting cover and are respectively sleeved on the left end of the stirring roller located in the front and the left end of the stirring roller located in the back.

3. The sand screening equipment for construction engineering as claimed in claim 1, characterized in that: The mounting cover is a U-shaped cover, the U-shaped cover is arranged vertically and along the front-rear direction, and the opening of the U-shaped cover is arranged to the right.

4. The sand screening equipment for construction engineering as claimed in claim 1, characterized in that: The sand screening equipment for construction projects also includes a telescopic device and a telescopic baffle. The telescopic baffle is horizontally arranged and movably inserted in the lower part of the feed hopper along the left-right direction and is located below the stirring roller. The telescopic device is installed on the frame and is located on the left side of the telescopic baffle and is connected to the telescopic baffle for telescoping the telescopic baffle along the left-right direction to open and close the lower part of the feed hopper.

5. The sand screening equipment for construction engineering as claimed in claim 4, characterized in that: The telescopic device is an electric push rod.

6. The sand screening equipment for construction engineering as claimed in claim 4, characterized in that: The lower part of the feed hopper is provided with a telescopic groove along the left-right direction, and the telescopic baffle is movably inserted in the telescopic groove along the left-right direction.

7. The sand screening equipment for construction engineering as claimed in claim 1, characterized in that: The sand screening equipment for construction engineering further comprises a filter frame, which is arranged horizontally and along the front-rear direction, and the filter frame is placed in the frame and is located to the right of the right end of the screening filter.

8. The sand screening equipment for construction engineering as claimed in claim 1, characterized in that: The scraper moving device includes a left fixed block, a right fixed block, a threaded rod and a knob, the left fixed block and the right fixed block are respectively arranged on the rear of the left end and the rear of the right end of the screening filter, the threaded rod is arranged along the inclination direction of the screening filter and is located between the left fixed block and the right fixed block, the right end of the threaded rod is rotatably connected to the right fixed block around the inclination direction of the screening filter, the left end of the threaded rod passes through the left fixed block along the inclination direction of the screening filter and is rotatably arranged relative to the left fixed block around the inclination direction of the screening filter and is exposed on the left side of the left fixed block, the knob is located to the left of the left end of the threaded rod and is connected to the left end of the threaded rod, and the rear end of the scraper is located between the left fixed block and the right fixed block and is sleeved and threadedly engaged with the threaded rod.

9. The sand screening equipment for construction engineering as claimed in claim 1, characterized in that: The sand screening equipment for construction projects also includes a front slider and a rear slider. The top of the front side and the top of the rear side of the screening filter are respectively provided with a front slide groove and a rear slide groove along the inclination direction of the screening filter. The front slider and the rear slider are respectively movably arranged in the front slide groove and the rear slide groove along the inclination direction of the screening filter. The front end and the rear end of the scraper are respectively located on the front slider and the rear slider and are respectively connected to the front slider and the rear slider.

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