Bridge engineering construction sand washing device

Abstract

This invention relates to the field of bridge engineering technology, specifically to a sand washing device for bridge construction. The device includes a feeding mechanism with a screening mechanism at its top. By incorporating both the feeding and screening mechanisms, this invention achieves efficient and automated screening and pushing of sand. The combination of a feeding machine, a feeding hopper, a double-discharge feeding pipe, and a rectangular screen tube enables preliminary screening of the sand, effectively removing larger particles and improving the subsequent sand washing process. Simultaneously, the coordinated operation of a dual-shaft motor, a rotating block, and an elliptical chute plate automates the screening process, reducing the tediousness and errors of manual operation. Furthermore, the linkage of the motor, transmission disc, track, and pusher plate accurately and quickly pushes the screened sand to the guide plate, which then guides it into the spiral sand washing machine, facilitating subsequent cleaning.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, and more specifically, to a sand washing device for bridge construction. Background Technology

[0002] A bridge is a structure specifically designed to span natural obstacles (such as rivers and canyons) or man-made structures (such as roads and railways). Its basic structure typically includes four main components: superstructure, substructure, ancillary facilities, and foundation. In the construction of bridge projects, sand washing equipment plays a crucial role. It is one of the core pieces of equipment to ensure the quality of sand used in construction. Through an efficient washing process, sand washing equipment can effectively remove mud, impurities, and other harmful substances mixed in with the sand, thereby ensuring that the purity and uniformity of the sand particles used meet the high standards and strict requirements of bridge construction. This not only directly improves the performance and durability of building materials such as concrete, but also provides a solid guarantee for the stability, safety, and long-term service life of the entire bridge structure.

[0003] According to patent document CN114904644B, the disclosed spiral sand washing device for bridge construction with a selection function relates to the technical field of spiral sand washing machines. It includes a spiral sand washing machine with a bearing block on top of the machine's casing. In the normal extended state of the return spring A, the reciprocating slider is in the middle area of ​​the spiral sand washing machine, at which point the friction plate contacts the spiral blades. The control box of this invention can be installed in an area away from the spiral sand washing machine through mounting holes and fasteners. The distance can be adjusted as needed, ensuring that workers remain in a safe area away from the machine during subsequent applications, preventing injury from potentially splashed stones. This solves the problem that current spiral sand washing machines lack a corresponding mandatory structure, making it impossible to force workers to stay away from the machine during operation, thus posing a safety hazard.

[0004] In the process of washing sand for bridge construction, spiral sand washing machines are currently widely used. However, when sand is transported from the mining site to the washing machine, it is often mixed with various stones and gravel collected during the mining process. Although some spiral sand washing machines are designed to pre-screen larger stones, which can reduce the mixing of impurities to a certain extent, it is often difficult to effectively separate and process smaller, irregularly shaped stones. Once these stones are mixed into the sand and enter the spiral sand washing machine, they will not only significantly affect the overall washing effect, leading to a decrease in the uniformity of sand particles and unstable quality, but may also further cause a series of problems in the operation of the equipment. More seriously, when the spiral sand washing machine is running, these stones are easily splashed by the high-speed rotating spiral blades, posing a potential threat to the physical safety of on-site operators and increasing operational risks. Therefore, how to effectively pre-treat these stones has become an urgent problem to be solved in the sand washing process. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, this invention provides a sand washing device for bridge engineering construction. The technical problem to be solved by this invention is that while some spiral sand washing machines are designed to preliminarily screen out larger stones, thus reducing the mixing of impurities to a certain extent, they often struggle to effectively separate and process smaller, irregularly shaped stones. Once these stones are mixed into the sand and enter the spiral sand washing machine, they not only significantly affect the overall washing effect, leading to a decrease in the uniformity and instability of the washed sand particles, but may also further cause a series of problems during equipment operation. More seriously, when the spiral sand washing machine is running, these stones are easily splashed by the high-speed rotating spiral blades, posing a potential threat to the physical safety of on-site operators and increasing operational risks. Therefore, how to effectively pre-treat these stones has become an urgent problem to be solved in the sand washing process.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A sand washing device for bridge construction includes a feeding mechanism, the top of which is equipped with a screening mechanism;

[0008] The feeding mechanism includes multiple L-shaped support plates, with a connecting platform fixedly connected to the top of each L-shaped support plate. Guide plates are rotatably connected to the left and right sides of the bottom front side of the connecting platform, and rotating side rods are rotatably connected to the outer sides of each of the two guide plates.

[0009] The screening mechanism includes a screening component, and a sand conveying component is fixedly connected to the rear side of the screening component.

[0010] As a further embodiment of the present invention: a material feeding platform is fixedly connected to both the left and right sides of the top of the connecting platform, and a material pushing component is fixedly connected to the front side of the inner side of the top of the two material feeding platforms.

[0011] As a further aspect of the present invention: the pushing assembly includes two rectangular side frames, the bottoms of the two rectangular side frames are fixedly connected to the inner sides of the tops of the two unloading platforms, a slide plate is fixedly connected to the top of the rear side of the two rectangular side frames, and sliding plates are slidably connected to the left and right sides of the rear side of the slide plate. Connecting rods are fixedly connected to the front and rear sides of the top of the two rectangular side frames, motor connecting plate side connecting blocks are fixedly connected to the inner sides of the two front connecting rods, motor connecting plates are fixedly connected to the inner sides of the two motor connecting plate side connecting blocks, a motor is fixedly connected to the top of the motor connecting plate, a transmission disc is fixedly connected to the output end of the motor, and a track is fitted on the outer wall of the transmission disc.

[0012] As a further embodiment of the present invention: columnar transverse rotating rod connecting blocks are fixedly connected to the bottom of both the front and rear sides of the two rectangular side frames; columnar transverse rotating rods are rotatably connected to the inner walls of the two sets of columnar transverse rotating rod connecting blocks; a third transmission disc is fixedly connected to the outer wall of the front columnar transverse rotating rod on one side of the inner side of the two front columnar transverse rotating rod connecting blocks; the outer wall of the third transmission disc is sleeved on the inner wall of the track on the side away from the transmission disc.

[0013] As a further embodiment of the present invention: the outer ends of the two columnar horizontal rotating rods extend to the outer side of the connecting blocks of the front and rear columnar horizontal rotating rods and are fixedly connected to the second transmission discs. The outer walls of the two second transmission discs on the left and the two second transmission discs on the right are fitted with second tracks. The rear side of the bottom of the two second tracks is fixedly connected to push plates, and the outer side of the two push plates is fixedly connected to inverted L-shaped push-pull rods.

[0014] As a further embodiment of the present invention: the outer walls of the two pusher plates are slidably connected to the rear side of the inner walls of the two unloading platforms, and the bottom of the inner side of the two inverted L-shaped push-pull rods are rotatably connected to the rear side of the outer side of the two rotating side rods.

[0015] As a further aspect of the present invention: the screening assembly includes a concave plate, the bottom of which is fixedly connected to the top of two sets of connecting rods. Vertical connecting rods are fixedly connected to the left and right sides of the front side of the top of the concave plate. Connecting rod front bars are fixedly connected to the top and bottom of the front sides of the two sets of connecting rod front bars. Rectangular guide blocks are fixedly connected to the front sides of the left and right sets of connecting rod front bars. T-shaped plates are fixedly connected to the inner sides of the top and bottom sets of rectangular guide blocks. Dual-axis motor connecting blocks are fixedly connected to the middle of the inner sides of the two T-shaped plates. A dual-axis motor is fixedly connected to the rear side of the dual-axis motor connecting blocks. The top and bottom output ends of the dual-axis motor extend to the outer sides of the two T-shaped plates and are fixedly connected to rotating blocks.

[0016] As a further embodiment of the present invention: elliptical slide plates are slidably connected to the outer walls of both rotating blocks; the front sides of the outer sides of both rotating blocks are rotatably connected to the inner walls of the two elliptical slide plates; a transverse moving rod is fixedly connected to the front side of each of the two elliptical slide plates; a second spring connecting block is fixedly connected to the middle of the front side of each of the two transverse moving rods; a spring connecting block is fixedly connected to the front side of each of the two rectangular guide blocks on the left; the left and right sides of the outer walls of the two transverse moving rods are slidably connected to the inner walls of the top and bottom sets of rectangular guide blocks; a spring is fixedly connected to the left side of each of the two second spring connecting blocks; and the left ends of each of the two springs are fixedly connected to the right side of the two spring connecting blocks.

[0017] As a further embodiment of the present invention: convex side plates are fixedly connected to the left and right sides of the two lateral moving rods, L-shaped shaking plates are fixedly connected to the outer sides of the two convex side plates, rectangular screen tubes are fixedly connected to the rear sides of the two L-shaped shaking plates, and the rear sides of the two rectangular screen tubes are fixedly connected to the front sides of the two slide plates.

[0018] As a further embodiment of the present invention: the sand conveying assembly includes two second L-shaped support plates, the bottoms of the two second L-shaped support plates are fixedly connected to the left and right sides of the rear side of the top of the connecting platform, and a T-shaped connecting plate is fixedly connected to the top of the two second L-shaped support plates. The front side of the bottom of the T-shaped connecting plate is fixedly connected to the inner wall of the rear side of the concave plate. A double-discharge head discharge pipe is fixedly connected to the rear side of the top middle of the double-discharge head discharge pipe. A material passage pipe is fixedly connected to the top of the material passage pipe. A discharge funnel is fixedly connected to the top of the material passage pipe. The left and right sides of the front side of the double-discharge head discharge pipe are aligned with the tops of the two rectangular screen pipes.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention achieves efficient and automated screening and conveying of sand by incorporating a feeding mechanism and a screening mechanism. The combination of a feeding machine, a feeding hopper, a double-discharge feeding pipe, and a rectangular screen tube enables preliminary screening of the sand, effectively removing larger particles and improving the subsequent sand washing process. Simultaneously, the coordinated operation of components such as a dual-shaft motor, a rotating block, and an elliptical chute plate automates the screening process, reducing the tediousness and errors of manual operation. Furthermore, the linkage of components such as the motor, transmission disc, track, and pusher plate accurately and quickly pushes the screened sand to the guide plate, which then guides it into the spiral sand washing machine, facilitating subsequent washing. The entire device is rationally designed, compact in structure, and easy to operate, significantly improving the efficiency and quality of sand washing operations in bridge construction. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main three-dimensional structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional separation structure of the main body of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the unloading platform of the present invention;

[0024] Figure 4 This is a schematic diagram of the three-dimensional separation structure of the unloading platform of the present invention;

[0025] Figure 5 This is a schematic diagram of the three-dimensional separation structure of the feeding component of the present invention;

[0026] Figure 6 This is a three-dimensional structural diagram of the screening mechanism of the present invention;

[0027] Figure 7 This is a schematic diagram of the three-dimensional separation structure of the sieving mechanism of the present invention;

[0028] Figure 8 This is a three-dimensional structural diagram of the sieving component of the present invention;

[0029] Figure 9 This is a schematic diagram of the three-dimensional separation structure of the sieving component of the present invention;

[0030] Figure 10 This is a three-dimensional structural diagram of the sand conveying component of the present invention.

[0031] In the diagram: 1. Feeding mechanism; 11. L-shaped support plate; 12. Connecting platform; 13. Feeding platform; 14. Guide ramp; 15. Rotating side rod; 16. Pushing assembly; 161. Rectangular side frame; 162. Slide plate; 163. Slide plate; 164. Connecting rod; 165. Motor connecting plate side connecting block; 166. Motor connecting plate; 167. Motor; 168. Transmission disc; 169. Track; 1610. Columnar transverse rotating rod connecting block; 1611. Columnar transverse rotating rod; 1612. Second transmission disc; 1613. Second track; 1614. Pushing plate; 1615. Inverted L-shaped push-pull rod; 1616. Third transmission disc; 2. Screening mechanism; 21. Screening assembly; 211, concave plate; 212, vertical connecting rod; 213, front connecting rod; 214, dual-shaft motor connecting block; 215, rectangular guide block; 216, T-shaped plate; 217, dual-shaft motor; 218, rotating block; 219, spring connecting block; 2110, transverse moving rod; 2111, elliptical chute plate; 2112, second spring connecting block; 2113, spring; 2114, convex side plate; 2115, L-shaped shaking plate; 2116, rectangular screen tube; 22, sand conveying assembly; 221, second L-shaped support plate; 222, T-shaped connecting plate; 223, double discharge head discharge pipe; 224, material passage pipe; 225, discharge funnel. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figure 1-2 As shown, the present invention provides a sand washing device for bridge construction, including a feeding mechanism 1, and a screening mechanism 2 is provided on the top of the feeding mechanism 1.

[0034] like Figure 3-10As shown, the unloading mechanism 1 includes multiple L-shaped support plates 11. A connecting platform 12 is fixedly connected to the top of each L-shaped support plate 11. Guide ramps 14 are rotatably connected to the left and right sides of the bottom front side of the connecting platform 12. Rotating side rods 15 are rotatably connected to the outer sides of each guide ramp 14. Unloading platforms 13 are fixedly connected to the left and right sides of the top of the connecting platform 12. Pushing components 16 are fixedly connected to the front sides of the inner sides of the tops of the two unloading platforms 13. The pushing components 16 include two rectangular side frames 161. The bottoms of the two rectangular side frames 161 are fixedly connected to the inner sides of the tops of the two unloading platforms 13. A sliding groove plate 162 is fixedly connected to the top of the rear side of the two rectangular side frames 161. Sliding sliding components are slidably connected to the left and right sides of the rear side of the sliding groove plate 162. Plate 163, two rectangular side frames 161, and connecting rods 164 are fixedly connected to the front and rear sides of the top. Motor connecting plate side connecting blocks 165 are fixedly connected to the inner sides of the two front connecting rods 164. Motor connecting plates 166 are fixedly connected to the inner sides of the two motor connecting plate side connecting blocks 165. A motor 167 is fixedly connected to the top of the motor connecting plate 166. A transmission disc 168 is fixedly connected to the output end of the motor 167. A track 169 is fitted onto the outer wall of the transmission disc 168. Columnar horizontal rotating rod connecting blocks 1610 are fixedly connected to the bottom of the front and rear sides of the two rectangular side frames 161. Columnar horizontal rotating rods 1611 are rotatably connected to the inner walls of the two sets of columnar horizontal rotating rod connecting blocks 1610. The outer wall of the front columnar horizontal rotating rod 1611 is connected to the front two... A third transmission disc 1616 is fixedly connected to one side of the inner side of the columnar transverse rotating rod connecting block 1610. The outer wall of the third transmission disc 1616 is fitted onto the inner wall of the track 169 on the side away from the transmission disc 168. The outer ends of the two columnar transverse rotating rods 1611 extend to the outer sides of the front and rear sets of columnar transverse rotating rod connecting blocks 1610 and are fixedly connected to the second transmission discs 1612. The outer walls of the two second transmission discs 1612 on the left and the two second transmission discs 1612 on the right are fitted with second tracks 1613. Push plates 1614 are fixedly connected to the rear side of the bottom of the two second tracks 1613. Inverted L-shaped push-pull rods 1615 are fixedly connected to the outer sides of the two push plates 1614. The outer walls of the two push plates 1614 are slidably connected to the two unloading platforms 1. 3. On the rear side of the inner wall, the bottom of the inner side of the two inverted L-shaped push-pull rods 1615 is rotatably connected to the rear side of the outer side of the two rotating side rods 15. The screening mechanism 2 includes a screening assembly 21. The rear side of the screening assembly 21 is fixedly connected to a sand conveying assembly 22. The screening assembly 21 includes a concave plate 211. The bottom of the concave plate 211 is fixedly connected to the top of two sets of connecting rods 164. The left and right sides of the front top of the concave plate 211 are fixedly connected to vertical connecting rods 212. The top and bottom of the front sides of the two vertical connecting rods 212 are fixedly connected to connecting rod front rods 213. The front sides of the left and right sets of connecting rod front rods 213 are fixedly connected to rectangular guide blocks 215. The inner sides of the top and bottom sets of rectangular guide blocks 215 are fixedly connected to T-shaped plates 216.A dual-axis motor connecting block 214 is fixedly connected to the inner center of each of the two T-shaped plates 216. A dual-axis motor 217 is fixedly connected to the rear side of the dual-axis motor connecting block 214. The top and bottom output ends of the dual-axis motor 217 extend to the outer sides of the two T-shaped plates 216 and are fixedly connected to rotating blocks 218. Elliptical slide plates 2111 are slidably connected to the outer walls of the two rotating blocks 218. The front sides of the outer sides of the two rotating blocks 218 are rotatably connected to the inner walls of the two elliptical slide plates 2111. Each of the two transverse moving rods 2110 is fixedly connected to a transverse moving rod 2110. A second spring connecting block 2112 is fixedly connected to the middle of the front side of each of the two transverse moving rods 2110. A spring connecting block 219 is fixedly connected to the front side of each of the two rectangular guide blocks 215 on the left side. The left and right sides of the outer walls of the two transverse moving rods 2110 are slidably connected to the inner walls of the top and bottom sets of rectangular guide blocks 215. A spring 2113 is fixedly connected to the left side of each of the two second spring connecting blocks 2112. The left ends of each of the two springs 2113 are fixedly connected to the two spring connecting blocks 219. On the right side, convex side plates 2114 are fixedly connected to both sides of the two transverse moving rods 2110. L-shaped shaking plates 2115 are fixedly connected to the outer sides of the two convex side plates 2114. Rectangular screen tubes 2116 are fixedly connected to the rear sides of the two L-shaped shaking plates 2115. The rear sides of the two rectangular screen tubes 2116 are fixedly connected to the front sides of the two sliding plates 163. The sand conveying assembly 22 includes two second L-shaped support plates 221. The bottoms of the two second L-shaped support plates 221 are fixedly connected to the left side of the rear top of the connecting platform 12. On both right sides, T-shaped connecting plates 222 are fixedly connected to the top of the two second L-shaped support plates 221. The front side of the bottom of the T-shaped connecting plate 222 is fixedly connected to the inner wall of the rear side of the concave plate 211. A double-discharge head discharge pipe 223 is fixedly connected to the rear side of the top of the T-shaped connecting plate 222. A material passage pipe 224 is fixedly connected to the rear side of the top middle of the double-discharge head discharge pipe 223. A discharge funnel 225 is fixedly connected to the top of the material passage pipe 224. The left and right sides of the front side of the double-discharge head discharge pipe 223 are aligned with the top of the two rectangular screen pipes 2116.

[0035] Before the sand is fed into the spiral sand washing machine for formal washing, the sand to be treated needs to be evenly fed into the discharge hopper 225 by the feeder. The discharge hopper 225 then steadily conveys the received sand through the feed pipe 224 to the inside of the double discharge head discharge pipe 223. The double discharge head discharge pipe 223 then distributes the sand into two rectangular screen pipes 2116. At this time, the dual-shaft motor 217 is started and starts to run. Its top and bottom output ends simultaneously drive the rotating block 218 to rotate. Since the rotating block 218 is slidably connected to the inner wall of the elliptical slide plate 2111, the rotation of the rotating block 218 will drive the elliptical slide plate 2111 to make regular reciprocating motion in the left and right directions.

[0036] The reciprocating motion of the elliptical sliding plate 2111 further drives the transverse moving rod 2110 to slide smoothly on the inner wall of the rectangular guide block 215, so that the convex side plate 2114 and the L-shaped shaking plate 2115 fixed on the transverse moving rod 2110 also continuously shake in the left and right directions. The shaking action of the L-shaped shaking plate 2115 is transmitted to the rectangular screen tube 2116, so that it produces a shaking effect synchronously. The shaking of the rectangular screen tube 2116 can effectively perform preliminary screening of the sand inside, separating out the larger particles of impurities and foreign objects to prevent these impurities from entering the subsequent sand washing stage, thereby ensuring the effect and quality of the sand washing process. At the same time, during the screening process, sand that meets the particle size requirements will gradually fall downward through the screen holes of the rectangular screen tube 2116.

[0037] Simultaneously, motor 167 is started, and its output drives transmission disc 168 to rotate. Transmission disc 168 transmits power to third transmission disc 1616 via track 169, causing it to rotate as well. Third transmission disc 1616 further drives columnar transverse rotating rod 1611 to rotate, and the rotation of columnar transverse rotating rod 1611 causes second transmission disc 1612 to start rotating. Second transmission disc 1612 drives pusher plate 1614 to reciprocate on the rear side of the inner wall of unloading platform 13 via second track 1613. The sliding motion of pusher plate 1614 will... After initial screening, the sand that falls onto the unloading platform 13 is gradually and evenly pushed forward. While the two pusher plates 1614 push the sand forward, the two inverted L-shaped push-pull rods 1615 push the two inner rotating side rods 15 to adjust the guide plate 14 to a suitable tilt angle. Finally, the sand is smoothly pushed to the guide plate 14. Guided by the guide plate 14, the sand is effectively transported to the subsequent spiral sand washing machine for further cleaning and processing, thus completing the preliminary preparation and initial screening and pushing process of the entire sand washing device.

[0038] Working principle of this invention: Before sand is fed into the spiral sand washing machine, the sand is first fed into the discharge hopper 225 by the feeding machine. The discharge hopper 225 discharges the sand through the feed pipe 224 into the double discharge head discharge pipe 223, and then through the double discharge head discharge pipe 223 into the two rectangular screen pipes 2116 respectively. At this time, the dual-shaft motor 217 is started and begins to run. Its top and bottom output ends drive the rotating block 218. The rotating block 218 is slidably connected to the inner wall of the elliptical slide plate 2111. The rotation of the rotating block 218 causes the elliptical slide plate 2111 to reciprocate left and right. This reciprocating motion further causes the transverse moving rod 2110 to slide on the inner wall of the rectangular guide block 215. This causes the convex side plate 2114 and the L-shaped shaking plate 2115, fixed to the transverse moving rod 2110, to also shake left and right. The shaking of the L-shaped shaking plate 2115 causes the rectangular screen tube 2116 to shake synchronously. The shaking of the rectangular screen tube 2116 allows for preliminary screening of the sand inside, removing larger impurities to prevent them from entering the subsequent sand washing process and affecting the washing effect. Simultaneously, during the screening process, sand that meets the requirements gradually falls through the sieve holes of the rectangular screen tube 2116. At the same time, the motor 167 is started, and the output end of the motor 167 drives the transmission disc 168 to rotate. The transmission disc 168 drives the third transmission disc 1616 to rotate through the track 169. The third transmission disc 1616 then drives the columnar horizontal rotating rod 1611 to rotate. The rotation of the columnar horizontal rotating rod 1611 causes the second transmission disc 1612 to rotate. The second transmission disc 1612 drives the pusher plate 1614 to slide on the rear side of the inner wall of the unloading platform 13 through the second track 1613. The sliding of the pusher plate 1614 will gradually push the sand that has fallen on the unloading platform 13 after preliminary screening forward. While the two pusher plates 1614 are pushing forward, the two inverted L-shaped push-pull rods 1615 push the two rotating side rods 15 on the inner side to push the guide plate 14 to an inclined angle. Finally, the sand is pushed to the guide plate 14, and the guide plate 14 guides the sand to the subsequent spiral sand washing machine for further cleaning.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A sand washing device for bridge construction, including a feeding mechanism (1), characterized in that: The top of the feeding mechanism (1) is provided with a screening mechanism (2). The feeding mechanism (1) includes multiple L-shaped support plates (11), and a connecting platform (12) is fixedly connected to the top of the multiple L-shaped support plates (11). The left and right sides of the bottom front side of the connecting platform (12) are rotatably connected to guide inclined plates (14), and the outer sides of the two guide inclined plates (14) are rotatably connected to rotating side rods (15). The screening mechanism (2) includes a screening component (21), and a sand conveying component (22) is fixedly connected to the rear side of the screening component (21).

2. The sand washing device for bridge construction according to claim 1, characterized in that: The top left and right sides of the connecting platform (12) are fixedly connected to the unloading platform (13), and the front side of the inner side of the top of the two unloading platforms (13) is fixedly connected to the pushing component (16).

3. The sand washing device for bridge construction according to claim 2, characterized in that: The pushing assembly (16) includes two rectangular side frames (161). The bottom of the two rectangular side frames (161) is fixedly connected to the inner side of the top of the two unloading platforms (13). The top of the rear side of the two rectangular side frames (161) is fixedly connected to a slide plate (162). The left and right sides of the rear side of the slide plate (162) are slidably connected to a slide plate (163). The front and rear sides of the top of the two rectangular side frames (161) are fixedly connected to a connecting rod (164). The inner side of the two front connecting rods (164) is fixedly connected to a motor connecting plate side connecting block (165). The inner side of the two motor connecting plate side connecting blocks (165) is fixedly connected to a motor connecting plate (166). The top of the motor connecting plate (166) is fixedly connected to a motor (167). The output end of the motor (167) is fixedly connected to a transmission disc (168). The outer wall of the transmission disc (168) is fitted with a track (169).

4. The sand washing device for bridge construction according to claim 3, characterized in that: The bottom of the two rectangular side frames (161) are fixedly connected to columnar horizontal rotating rod connecting blocks (1610) on both the front and rear sides. The inner walls of the two sets of columnar horizontal rotating rod connecting blocks (1610) are rotatably connected to columnar horizontal rotating rods (1611). The outer wall of the front columnar horizontal rotating rod (1611) is fixedly connected to a third transmission disc (1616) on one side of the inner side of the two front columnar horizontal rotating rod connecting blocks (1610). The outer wall of the third transmission disc (1616) is sleeved on the inner wall of the track (169) away from the transmission disc (168).

5. The sand washing device for bridge construction according to claim 4, characterized in that: The outer ends of the two columnar horizontal rotating rods (1611) extend to the outside of the front and rear sets of columnar horizontal rotating rod connecting blocks (1610) and are fixedly connected to the second transmission discs (1612). The outer walls of the two second transmission discs (1612) on the left and the two second transmission discs (1612) on the right are fitted with second tracks (1613). The rear side of the bottom of the two second tracks (1613) is fixedly connected to push plates (1614). The outer sides of the two push plates (1614) are fixedly connected to inverted L-shaped push-pull rods (1615).

6. The sand washing device for bridge construction according to claim 5, characterized in that: The outer walls of the two push plates (1614) are slidably connected to the rear side of the inner wall of the two unloading platforms (13), and the bottom of the inner side of the two inverted L-shaped push rods (1615) are rotatably connected to the rear side of the outer side of the two rotating side rods (15).

7. The sand washing device for bridge construction according to claim 1, characterized in that: The screening assembly (21) includes a concave plate (211), the bottom of which is fixedly connected to the top of two sets of connecting rods (164). Vertical connecting rods (212) are fixedly connected to the left and right sides of the front side of the top of the concave plate (211). Connecting rod front bars (213) are fixedly connected to the top and bottom of the front sides of the two connecting rods (212). Rectangular guide blocks (214) are fixedly connected to the front sides of the left and right sets of connecting rod front bars (213). 5) T-shaped plates (216) are fixedly connected to the inner sides of the two sets of rectangular guide blocks (215) at the top and bottom. Dual-axis motor connecting blocks (214) are fixedly connected to the middle of the inner sides of the two T-shaped plates (216). Dual-axis motors (217) are fixedly connected to the rear side of the dual-axis motor connecting blocks (214). The top and bottom output ends of the dual-axis motors (217) extend to the outer sides of the two T-shaped plates (216) and are fixedly connected to rotating blocks (218).

8. The sand washing device for bridge construction according to claim 7, characterized in that: The outer walls of the two rotating blocks (218) are slidably connected to elliptical slide plates (2111). The front sides of the outer sides of the two rotating blocks (218) are rotatably connected to the inner walls of the two elliptical slide plates (2111). The front sides of the two elliptical slide plates (2111) are fixedly connected to transverse moving rods (2110). The middle of the front sides of the two transverse moving rods (2110) are fixedly connected to second spring connecting blocks (2112). The front sides of the two rectangular guide blocks (215) on the left are fixedly connected to spring connecting blocks (219). The left and right sides of the outer walls of the two transverse moving rods (2110) are slidably connected to the inner walls of the top and bottom sets of rectangular guide blocks (215). The left sides of the two second spring connecting blocks (2112) are fixedly connected to springs (2113). The left ends of the two springs (2113) are fixedly connected to the right sides of the two spring connecting blocks (219).

9. The sand washing device for bridge construction according to claim 8, characterized in that: Convex side plates (2114) are fixedly connected to the left and right sides of the two lateral moving rods (2110). L-shaped shaking plates (2115) are fixedly connected to the outer sides of the two convex side plates (2114). Rectangular screen tubes (2116) are fixedly connected to the rear sides of the two L-shaped shaking plates (2115). The rear sides of the two rectangular screen tubes (2116) are fixedly connected to the front sides of the two sliding plates (163).

10. The sand washing device for bridge construction according to claim 1, characterized in that: The sand conveying assembly (22) includes two second L-shaped support plates (221). The bottoms of the two second L-shaped support plates (221) are fixedly connected to the left and right sides of the rear top of the connecting platform (12). The tops of the two second L-shaped support plates (221) are fixedly connected to a T-shaped connecting plate (222). The front side of the bottom of the T-shaped connecting plate (222) is fixedly connected to the inner wall of the rear side of the concave plate (211). The rear side of the top of the T-shaped connecting plate (222) is fixedly connected to a double discharge head discharge pipe (223). The rear side of the top middle of the double discharge head discharge pipe (223) is fixedly connected to a material passage pipe (224). The top of the material passage pipe (224) is fixedly connected to a discharge funnel (225). The left and right sides of the front side of the double discharge head discharge pipe (223) are aligned with the tops of the two rectangular screen pipes (2116).

Images