Sand screening device for construction engineering
By designing anti-sticking and drying mechanisms, combined with motor-driven gear rack and pinion and swaying mechanisms, the problems of low efficiency and wet sand treatment in traditional sand screening devices have been solved, achieving efficient sand screening and resource conservation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 沽源县恒东建筑材料有限公司
- Filing Date
- 2025-07-02
- Publication Date
- 2026-06-02
Smart Images
Figure CN224308960U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sand screening technology for construction engineering, and in particular to a sand screening device for construction engineering. Background Technology
[0002] In construction engineering, sand and gravel are important components of building materials such as concrete and mortar. Their particle uniformity and cleanliness directly affect the quality of the project and the structural strength. Traditional sand screening mainly relies on manual labor or simple vibrating screens, which has problems such as low efficiency, high labor intensity, and unstable screening effect. Especially in large construction sites or when the sand and gravel raw materials contain a lot of impurities, manual sand screening is difficult to meet the needs of continuous and efficient operation. In addition, traditional sand screening devices often lack automated control, and most of them can only screen dry sand and cannot process wet sand, which leads to resource waste and increased costs.
[0003] Therefore, there is a need for a utility model of a sand screening device for construction engineering. It is not only simple in structure but also highly practical. It can screen sand in different states, reducing the procurement cost of purchasing multiple equipment. It can also dry and screen wet sand, and can be selected according to the actual situation in construction engineering. This not only fits the actual use situation but also increases the sand screening efficiency. Summary of the Invention
[0004] To address the aforementioned technical problems, this utility model provides a sand screening device for construction engineering, thereby solving the problems.
[0005] The technical solution used in this utility model is: a sand screening device for construction engineering, comprising: an anti-adhesion part, an inclined chute frame, a moisture removal part, a supporting base plate, and a sand screening part;
[0006] The anti-adhesion section, inclined chute frame, supporting base plate, and sand screening section are all fixedly installed on the ground. A controller is fixedly installed on the anti-adhesion section. The controller receives signals through a signal processor and controls the electrical components of the equipment to operate in an orderly manner through a central processing unit. The inclined chute frame is located below the outlet of the anti-adhesion section and above the inlet of the moisture removal section. The moisture removal section is fixedly installed on the supporting base plate, and its outlet is located above the sand screening section.
[0007] The moisture removal component includes: a second motor, a sector gear, a second spur rack, a long spring, a connecting bracket, a lead screw moving mechanism, and a shielding base plate;
[0008] There are two second motors, which are fixedly mounted on a connecting bracket on the same side. The shaft of each second motor is fixedly connected to a sector gear on the same side. The teeth of each sector gear intermittently mesh with a second spur rack. A long spring is fixedly mounted on both sides of each second spur rack. There are two long springs, and the other ends of the two long springs are fixedly connected to the inner side of the connecting bracket. The connecting bracket is fixedly mounted on the support base plate.
[0009] Preferably, the anti-adhesion part includes: a conical barrel, an outer connecting frame, a first motor, a rectangular connecting plate, a circular plate, a small spring, and a support plate;
[0010] The conical barrel is connected to an external connecting frame via a connector. The external connecting frame is attached to a predetermined installation area on the ground via a fastening mechanism. The first motor is mounted on one of the rectangular connecting plates via screws and nuts. There are two rectangular connecting plates, each fixedly connected to the external connecting frame. The shaft of the first motor is fixedly connected to a circular plate. Both sides of the circular plate are provided with sliding grooves, in which rods from the side of the support plate are slidably installed. There are four small springs, one end of each of the four small springs is fixedly connected to a rectangular connecting plate, and the other end of each of the four small springs is fixedly connected to a support plate. The support plate is fixedly connected to two first straight racks.
[0011] Preferably, the anti-adhesion part further includes: a first spur rack, a cylindrical gear, and a cam;
[0012] There are two first straight racks, each of which meshes with a cylindrical gear on the same side. There are two cylindrical gears, each of which is rotatably mounted on the outer connecting frame. There are two cams, each of which is rotatably mounted on the outer connecting frame. Each cam is fixedly connected to a cylindrical gear on the same side.
[0013] Preferably, the moisture removal section includes: a heating tank and a blower box;
[0014] The heating barrel has pipes on both sides, which are connected to the blower boxes on both sides. A second straight rack is fixedly installed on each of the other two sides of the heating barrel. The two blower boxes are fixedly installed on the support base plate.
[0015] Preferably, the inner wall of the heating barrel is provided with heating strips.
[0016] The moisture removal part further includes: two lead screw moving mechanisms, the brackets of the two lead screw moving mechanisms are respectively fixedly installed on the plate at the lower end of the heating barrel, and the slider of each lead screw moving mechanism passes through the plate below the heating barrel and is fixedly connected to a shielding base plate. There are two shielding base plates, and the two shielding base plates are respectively slidably installed on the plate below the heating barrel.
[0017] Preferably, the sand screening part includes: a filter screen plate, a shaking mechanism, a cylindrical rod, a storage box, and an outer support;
[0018] A cylindrical rod is fixedly installed at each of the four corners of the filter screen plate, and each cylindrical rod is slidably installed in the groove of the trough plate of the shaking mechanism; the storage box is placed on the ground below the filter screen plate; there are two external supports, which are fixedly installed on the ground; there are four sets of shaking mechanisms, two sets of shaking mechanisms are installed on one external support, and the other two sets of shaking mechanisms are installed on another external support.
[0019] Preferably, the support rods at the four corners of the filter screen plate are slidably mounted on the two outer supports.
[0020] Preferably, the swaying mechanism includes: a third motor and a slotted plate;
[0021] The third motor is fixedly mounted on an external bracket. The shaft of the third motor is fixedly connected to the central shaft of the channel plate. The channel plate is provided with a sliding groove, in which a cylindrical rod is slidably installed.
[0022] The advantages of this utility model compared with the prior art are:
[0023] 1. This equipment has a simple structure but is highly practical. It can screen sand in different states, reducing the procurement cost of purchasing multiple pieces of equipment. This equipment can dry and screen wet sand, and can be selected according to the actual situation in construction projects. This not only fits the actual use situation, but also increases the sand screening efficiency.
[0024] This device uses a first motor to drive a circular plate to rotate, which in turn causes the sliding groove on the side of the circular plate to move the support plate, which in turn moves the first spur rack, thereby driving the cylindrical gear and cam to rotate. This causes the cam to strike the side of the conical barrel, causing the wet sand to fall off and breaking the wet sand from a clump to a looser state.
[0025] After the sand falls onto the filter screen plate, the third motor drives the trough plate to swing, which in turn causes the sliding groove on the trough plate to drive the cylindrical rod, which in turn drives the support rod of the filter screen plate to move up and down, thereby moving the filter screen plate up and down to achieve the purpose of sand screening. Attached Figure Description
[0026] Figure 1 This is a first-angle structural diagram of the overall structure of this utility model.
[0027] Figure 2 This is a second-angle structural diagram of the overall structure of this utility model.
[0028] Figure 3This is a structural schematic diagram of the anti-adhesion part of this utility model from a first angle.
[0029] Figure 4 This is a structural schematic diagram of the anti-adhesion part of this utility model from a second angle.
[0030] Figure 5 This is a structural schematic diagram of the anti-adhesion part of this utility model from a third angle.
[0031] Figure 6 This is a schematic diagram of the moisture-removing part of this utility model from a first angle.
[0032] Figure 7 For the present utility model Figure 6 A magnified structural diagram at point A.
[0033] Figure 8 This is a structural schematic diagram of the moisture-removing part of this utility model from a second angle.
[0034] Figure 9 This is a structural schematic diagram of the moisture-removing part of this utility model from a third angle.
[0035] Figure 10 This is a schematic diagram of the sand screening part of this utility model.
[0036] Figure 11 For the present utility model Figure 10 A magnified structural diagram at point B.
[0037] Reference numerals: 1. Anti-adhesion part; 2. Inclined chute frame; 3. Moisture removal part; 4. Support base plate; 5. Sand sieving part; 101. Conical barrel; 102. External connecting frame; 103. First motor; 104. Rectangular connecting plate; 105. Circular plate; 106. Small spring; 107. Support plate; 108. First spur rack; 109. Cylindrical gear; 110. Cam; 301. Heating barrel; 302. Hair dryer box; 303. Second motor; 304. Sector gear; 305. Second spur rack; 306. Long spring; 307. Connecting bracket; 308. Screw moving mechanism; 309. Covering base plate; 501. Filter screen plate; 502. Third motor; 503. Groove plate; 504. Cylindrical rod; 505. Storage box; 506. External support. Detailed Implementation
[0038] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model patent. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are merely simplified descriptions for ease of description and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model patent. Furthermore, for ease of description, spatial relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the accompanying drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used herein can be interpreted accordingly.
[0040] Implementation, for example Figures 1-11 As shown, a sand screening device for construction engineering includes: an anti-adhesion part 1, an inclined chute frame 2, a moisture removal part 3, a supporting base plate 4, and a sand screening part 5.
[0041] The anti-adhesion section 1, the inclined chute frame 2, the supporting base plate 4, and the sand screening section 5 are all fixedly installed on the ground. A controller is fixedly installed on the anti-adhesion section 1. The controller receives signals through its signal processor and controls the electrical components of the equipment to operate in an orderly manner through its central processing unit. The inclined chute frame 2 is located below the outlet of the anti-adhesion section 1 and above the inlet of the moisture removal section 3. The moisture removal section 3 is fixedly installed on the supporting base plate 4, and its outlet is located above the sand screening section 5. Specifically, this equipment can be used not only for screening dry sand but also for screening wet sand. Dry sand is manually poured directly into the moisture removal section 3, and then slowly falls into the sand screening section. The equipment is divided into five sections. The sand is sieved using the sand screening section 5. After the wet sand is manually poured into the bucket inside the anti-sticking section 1, in order to prevent the wet sand from sticking to the inner wall of the bucket, the mechanism of the anti-sticking section 1 is used to knock the bucket, which can make the wet sand from a clump state into a looser state. Then the wet sand falls from the inclined slide frame 2 into the moisture removal section 3. The moisture removal section 3 dries and shakes the wet sand. Then the sand slowly falls onto the sand screening section 5 using the sand screening section 5 to screen the sand. This equipment has a simple structure but is highly practical. It can screen sand in different states, reducing the procurement cost of purchasing multiple pieces of equipment.
[0042] The moisture removal part 3 includes: a second motor 303, a sector gear 304, a second rack 305, a long spring 306, a connecting bracket 307, a lead screw moving mechanism 308, and a shielding base plate 309;
[0043] There are two second motors 303, each fixedly mounted on a connecting bracket 307 on the same side. The shaft of each second motor 303 is fixedly connected to a sector gear 304 on the same side. The teeth of each sector gear 304 intermittently mesh with a second spur rack 305. Two long springs 306 are fixedly mounted on both sides of each second spur rack 305. The other ends of the two long springs 306 are fixedly connected to the inner side of the connecting bracket 307, which is fixedly mounted on the supporting base plate 4. Specifically, after wet sand falls into the heating tank 301, the second motors 303 drive the sector gears 304 to rotate, which in turn causes the sector gears 304 to move the second spur racks 305. This causes the heating barrel 301 to sway left and right, thus breaking up the wet sand inside the heating barrel 301. When the sector gear 304 rotates to disengage from the second rack 305, the second rack 305, connected by two long springs 306, keeps the second rack 305 and the heating barrel 301 swaying. At the same time, hot air is supplied to the heating barrel 301 through two blower boxes 302, which, together with the heating strip inside the heating barrel 301, heats and dries the wet sand inside the heating barrel 301. After drying, the two shielding bottom plates 309 are moved by the lead screw moving mechanism 308, so that the shielding bottom plates 309 slowly open, allowing the sand inside the heating barrel 301 to slowly fall out and onto the filter screen plate 501.
[0044] In one optional embodiment of this utility model, such as Figures 3-5 As shown, the anti-adhesion part 1 includes: a conical barrel 101, an outer connecting frame 102, a first motor 103, a rectangular connecting plate 104, a circular plate 105, a small spring 106, and a support plate 107.
[0045] The conical barrel 101 is connected to the outer connecting frame 102 via a connector. The outer connecting frame 102 is attached to the predetermined installation area on the ground via a fastening mechanism. The first motor 103 is mounted on one of the rectangular connecting plates 104 via screws and nuts. There are two rectangular connecting plates 104, which are fixedly connected to the outer connecting frame 102 respectively. The shaft of the first motor 103 is fixedly connected to the circular plate 105. Both sides of the circular plate 105 are provided with sliding grooves, in which rods on the side of the support plate 107 are slidably installed. There are four small springs 106. One end of each of the four small springs 106 is fixedly connected to the rectangular connecting plate 104, and the other end of each of the four small springs 106 is fixedly connected to the support plate 107. The support plate 107 is fixedly connected to two first straight racks 108.
[0046] In one optional embodiment of this utility model, such as Figures 3-5As shown, the anti-adhesion part 1 also includes: a first spur rack 108, a cylindrical gear 109, and a cam 110;
[0047] There are two first straight racks 108, each meshing with a cylindrical gear 109 on the same side. There are two cylindrical gears 109, each rotatably mounted on the outer connecting frame 102. There are two cams 110, each rotatably mounted on the outer connecting frame 102, each cam 110 fixedly connected to a cylindrical gear 109 on the same side. Specifically, after wet sand is poured into the conical barrel 101, to prevent the wet sand from sticking to the inner wall of the conical barrel 101 and blocking the outlet of the conical barrel 101, the conical barrel 101 needs to be struck during the flow of wet sand. The first motor 103 drives the circular plate 105 to rotate, which in turn causes the sliding groove on the side of the circular plate 105 to move the support plate 107, which in turn drives the first straight racks 108 to move, thereby driving the cylindrical gears 109 and cams 110 to rotate, and further causing the cams 110 to strike the side of the conical barrel 101, causing the wet sand to fall off.
[0048] In one optional embodiment of this utility model, such as Figure 6 As shown, the moisture removal part 3 includes: a heating tank 301 and a blower box 302;
[0049] The heating barrel 301 has pipes on both sides, which are connected to the blower boxes 302 on both sides. A second straight rack 305 is fixedly installed on the other two sides of the heating barrel 301. The two blower boxes 302 are fixedly installed on the support base plate 4.
[0050] In one optional embodiment of this utility model, such as Figure 6 As shown, the inner wall of the heating barrel 301 is equipped with heating strips, which can effectively improve the drying efficiency of wet sand.
[0051] In one optional embodiment of this utility model, such as Figure 6 , Figure 9 As shown, the moisture removal part 3 also includes: two lead screw moving mechanisms 308, the brackets of the two lead screw moving mechanisms 308 are respectively fixedly installed on the plate at the lower end of the heating tank 301, and the slider of each lead screw moving mechanism 308 passes through the plate below the heating tank 301 and is fixedly connected to a shielding base plate 309. There are two shielding base plates 309, and the two shielding base plates 309 are respectively slidably installed on the plate below the heating tank 301.
[0052] In one optional embodiment of this utility model, such as Figure 10 , Figure 11 As shown, the sand screening part 5 includes: a filter screen plate 501, a shaking mechanism, a cylindrical rod 504, a storage box 505, and an outer support 506.
[0053] A cylindrical rod 504 is fixedly installed at each of the four corners of the filter screen plate 501. Each cylindrical rod 504 is slidably installed in the groove of the trough plate 503 of the shaking mechanism. The storage box 505 is placed on the ground below the filter screen plate 501. There are two outer supports 506, which are fixedly installed on the ground. There are four sets of shaking mechanisms, two of which are installed on one outer support 506 and the other two are installed on the other outer support 506. Specifically, when sand falls onto the filter screen plate 501, the third motor 502 drives the trough plate 503 to swing, which in turn drives the cylindrical rods 504 on the trough plate 503 to move the support rods of the filter screen plate 501 up and down, thereby moving the filter screen plate 501 up and down, thus achieving sand sieving.
[0054] In one optional embodiment of this utility model, such as Figure 10 , Figure 11 As shown, the support rods at the four corners of the filter screen plate 501 are slidably installed on the two outer supports 506 respectively.
[0055] In one optional embodiment of this utility model, such as Figure 10 , Figure 11 As shown, the swaying mechanism includes: a third motor 502 and a slotted plate 503;
[0056] The third motor 502 is fixedly mounted on an outer bracket 506. The shaft of the third motor 502 is fixedly connected to the central shaft of the channel plate 503. The channel plate 503 is provided with a sliding groove, in which a cylindrical rod 504 is slidably installed.
[0057] Working principle:
[0058] This equipment has a simple structure but is highly practical. It can screen sand in different states, reducing the procurement cost of purchasing multiple pieces of equipment. This equipment can dry and screen wet sand, and can be selected according to the actual situation in construction projects. This not only fits the actual use situation, but also increases the sand screening efficiency.
[0059] Dry sand is manually poured directly into the heating tank 301. After the dry sand falls into the heating tank 301, the second motor 303 drives the sector gear 304 to rotate, which in turn drives the second rack 305 to move, causing the heating tank 301 to sway left and right, thus breaking up the dry sand inside the heating tank 301. When the sector gear 304 rotates to disengage from the second rack 305, the second rack 305, connected by two long springs 306, keeps the second rack 305 and the heating tank 301 swaying. The lead screw moving mechanism 308 drives the two shielding bottom plates 309 to move, thus slowly opening the shielding bottom plates 309, allowing the sand inside the heating tank 301 to slowly fall out and onto the filter screen plate 501.
[0060] When sand falls onto the filter screen plate 501, the third motor 502 drives the trough plate 503 to swing, which in turn drives the cylindrical rod 504 on the trough plate 503 to move the support rod of the filter screen plate 501 up and down, thereby moving the filter screen plate 501 up and down, thus achieving sand screening.
[0061] After the wet sand is poured into the conical barrel 101, in order to prevent the wet sand from sticking to the inner wall of the conical barrel 101 and blocking the outlet of the conical barrel 101, it is necessary to knock the conical barrel 101 during the flow of wet sand. The first motor 103 drives the circular plate 105 to rotate, which in turn causes the sliding groove on the side of the circular plate 105 to drive the support plate 107 to move, which in turn drives the first spur rack 108 to move, thereby driving the cylindrical gear 109 and the cam 110 to rotate, which in turn causes the cam 110 to knock the side of the conical barrel 101, causing the wet sand to fall off, and the wet sand can be knocked from a clump to a looser state.
[0062] Subsequently, the wet sand falls from the inclined chute frame 2 into the heating tank 301. After the wet sand falls into the heating tank 301, the second motor 303 drives the sector gear 304 to rotate, which in turn drives the second spur rack 305 to move, thereby causing the heating tank 301 to sway left and right, thus dispersing the wet sand inside the heating tank 301. When the sector gear 304 rotates to the point of disengaging from the second spur rack 305, the second spur rack 305, connected by two long springs 306, causes the second... The rack and pinion 305 and the heating barrel 301 are kept shaking; at the same time, hot air is delivered to the inside of the heating barrel 301 through two blower boxes 302, which, together with the heating strip inside the heating barrel 301, heats and dries the wet sand inside the heating barrel 301; after drying, the two shielding bottom plates 309 are moved by the lead screw moving mechanism 308, so that the shielding bottom plates 309 are slowly opened, allowing the sand inside the heating barrel 301 to slowly fall out of the heating barrel 301 and fall onto the filter screen plate 501;
[0063] When sand falls onto the filter screen plate 501, the third motor 502 drives the trough plate 503 to swing, which in turn drives the cylindrical rod 504 on the trough plate 503 to move the support rod of the filter screen plate 501 up and down, thereby moving the filter screen plate 501 up and down, thus achieving sand screening.
[0064] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A sand screening device for construction engineering, characterized in that, include: Anti-adhesion part (1), inclined chute frame (2), moisture removal part (3), supporting base plate (4), sand screening part (5); The anti-adhesion part (1), the inclined chute frame (2), the supporting base plate (4) and the sand screening part (5) are respectively fixedly installed on the ground. A controller is fixedly installed on the anti-adhesion part (1). The signal processor in the controller receives the signal and the central processor in the controller controls the electrical components of the equipment to operate in an orderly manner. The inclined chute frame (2) is located below the outlet of the anti-adhesion part (1) and above the inlet of the moisture removal part (3). The moisture removal part (3) is fixedly installed on the supporting base plate (4) and the outlet of the moisture removal part (3) is located above the sand screening part (5). The moisture removal part (3) includes: a second motor (303), a sector gear (304), a second spur rack (305), a long spring (306), a connecting bracket (307), a lead screw moving mechanism (308), and a shielding base plate (309). There are two second motors (303). The two second motors (303) are fixedly installed on a connecting bracket (307) on the same side. The shaft of each second motor (303) is fixedly connected to a sector gear (304) on the same side. The teeth of each sector gear (304) are intermittently meshed with a second spur rack (305). A long spring (306) is fixedly installed on both sides of each second spur rack (305). There are two long springs (306). The other ends of the two long springs (306) are fixedly connected to the inner side of the connecting bracket (307). The connecting bracket (307) is fixedly installed on the support base plate (4).
2. The sand screening device for construction engineering according to claim 1, characterized in that, The anti-adhesion part (1) includes: a conical barrel (101), an outer connecting frame (102), a first motor (103), a rectangular connecting plate (104), a circular plate (105), a small spring (106), and a support plate (107); The conical barrel (101) is connected to the outer connecting frame (102) via a connector. The outer connecting frame (102) is attached to the predetermined installation area on the ground via a fastening mechanism. The first motor (103) is installed on one of the rectangular connecting plates (104) by screws and nuts. There are two rectangular connecting plates (104). The two rectangular connecting plates (104) are fixedly connected to the outer connecting frame (102) respectively. The shaft of the first motor (103) is fixedly connected to the circular plate (105). The circular plate (105) has sliding grooves on both sides. The rods on the side of the support plate (107) are slidably installed in the sliding grooves respectively. There are four small springs (106). One end of the four small springs (106) is fixedly connected to the rectangular connecting plate (104) respectively. The other end of the four small springs (106) is fixedly connected to the support plate (107) respectively. The support plate (107) is fixedly connected to two first straight racks (108).
3. The sand screening device for construction engineering according to claim 1, characterized in that, The anti-adhesion part (1) further includes: a first straight rack (108), a cylindrical gear (109) and a cam (110); There are two first straight racks (108), and the two first straight racks (108) mesh with a cylindrical gear (109) on the same side respectively. There are two cylindrical gears (109), and the two cylindrical gears (109) are rotatably mounted on the outer connecting frame (102) respectively. There are two cams (110), and the two cams (110) are rotatably mounted on the outer connecting frame (102) respectively. Each cam (110) is fixedly connected to a cylindrical gear (109) on the same side respectively.
4. The sand screening device for construction engineering according to claim 1, characterized in that, The moisture removal section (3) includes: a heating tank (301) and a blower box (302); The heating barrel (301) has pipes on both sides, which are connected to the blower boxes (302) on both sides. A second straight rack (305) is fixedly installed on the other two sides of the heating barrel (301). The two blower boxes (302) are fixedly installed on the support base plate (4).
5. The sand screening device for construction engineering according to claim 4, characterized in that, The inner wall of the heating barrel (301) is provided with heating strips.
6. The sand screening device for construction engineering according to claim 1, characterized in that, The moisture removal part (3) further includes: two lead screw moving mechanisms (308), the brackets of the two lead screw moving mechanisms (308) are respectively fixedly installed on the plate at the lower end of the heating barrel (301), and the slider of each lead screw moving mechanism (308) passes through the plate below the heating barrel (301) and is fixedly connected to a shielding base plate (309). There are two shielding base plates (309), and the two shielding base plates (309) are respectively slidably installed on the plate below the heating barrel (301).
7. The sand screening device for construction engineering according to claim 1, characterized in that, The sand screening part (5) includes: a filter screen plate (501), a shaking mechanism, a cylindrical rod (504), a storage box (505), and an outer support (506); A cylindrical rod (504) is fixedly installed at each of the four corners of the filter screen plate (501), and each cylindrical rod (504) is slidably installed in the groove of the trough plate (503) of the shaking mechanism; the storage box (505) is placed on the ground below the filter screen plate (501); there are two outer supports (506), and the two outer supports (506) are fixedly installed on the ground; there are four sets of shaking mechanisms, of which two sets of shaking mechanisms are installed on one outer support (506) and the other two sets of shaking mechanisms are installed on another outer support (506).
8. The sand screening device for construction engineering according to claim 7, characterized in that, The support rods at the four corners of the filter screen plate (501) are slidably mounted on the two outer supports (506).
9. The sand screening device for construction engineering according to claim 7, characterized in that, The shaking mechanism includes: a third motor (502) and a grooved plate (503); The third motor (502) is fixedly mounted on an outer bracket (506). The shaft of the third motor (502) is fixedly connected to the central shaft of the slotted plate (503). The slotted plate (503) is provided with a sliding groove, in which a cylindrical rod (504) is slidably installed.