Multi-stage gravel screening device

Abstract

The utility model discloses a multistage gravel screening device, which relates to the technical field of screening equipment and comprises a shell, a feeding pipe is fixedly mounted on the upper surface of the shell, and a first screen, a second screen and an anti-blocking unit for cleaning the first screen and the second screen are fixedly mounted in the shell. The device has the beneficial effects that a motor, a screw rod and a sliding block drive a mounting frame to move along a first screen and a second screen, a hydraulic cylinder drives a top plate and top teeth to move, and the top plate and the top teeth push the first screen and the second screen, so that the first screen and the second screen deform and protrude to a certain extent; according to the device, the first screen mesh and the second screen mesh are arranged, so that materials on the first screen mesh and the second screen mesh are dispersed, the materials can be better screened, sand and stones blocked on the first screen mesh and the second screen mesh are separated, the passing ability of the materials on the first screen mesh and the second screen mesh is effectively prevented from being affected, and the sand and stone screening efficiency of the first screen mesh and the second screen mesh is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of screening equipment, in particular to a multi-stage sand and gravel screening device. Background Art

[0002] Multi-stage screening sand and gravel device is a kind of equipment used for screening and filtering sand and gravel, which can be used in construction, road, water conservancy and other projects. Its main function is to classify sand and gravel according to different particle sizes through multi-stage screening and filtering to meet the needs of different projects.

[0003] The patent application with Chinese patent announcement number CN221433908U discloses a multi-stage screening sand and gravel device for engineering construction, which mainly performs graded screening on sand and gravel through the primary vibrating screen and the secondary vibrating screen inside the screening chamber. Since the screen hole diameter of the primary vibrating screen is smaller than the screen hole diameter of the secondary vibrating screen, the sand and gravel will screen out the fine sand when passing through the primary vibrating screen, and the slightly larger sand and gravel will be screened out from the screen holes of the secondary vibrating screen as the screen vibrates, and the coarse sand will remain above the secondary vibrating screen, thereby completing the multi-stage screening of sand and gravel.

[0004] When screening sand and gravel, since sand and gravel have various shapes and sizes, some of them will be stuck in the sieve holes of the screen during the screening process. The vibration force during screening alone cannot make the sand and gravel escape from the screen, which affects the sand and gravel passing through the sieve holes on the screen and slows down the efficiency of sand and gravel screening. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-stage sand and gravel screening device in order to solve the above problems.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] A multi-stage screening sand and gravel device, comprising a shell for preventing screened materials from splashing, a feed pipe fixedly mounted on the upper surface of the shell, a first discharge port, a second discharge port and a vibration mechanism for driving the screened materials are arranged on the side of the shell, an elastic support foot mechanism and a third discharge port are mounted on the lower surface of the shell, a first screen, a second screen and an anti-blocking unit for cleaning the first screen and the second screen are fixedly mounted inside the shell, the first screen is located above the second screen, the lower end of the first screen is located in the first discharge port, the lower end of the second screen is located in the second discharge port, and the second screen is located above the third discharge port;

[0008] The anti-blocking unit in the shell includes a mounting groove and a mounting frame. The mounting groove is arranged on both sides of the interior of the shell. A displacement component is installed in the mounting groove. A slider is installed on the displacement component. The slider is slidably installed in the mounting groove. The mounting frame is fixedly installed on the slider. A hydraulic cylinder is fixedly installed on the mounting frame. A top plate is fixedly installed on the telescopic end of the hydraulic cylinder. Top teeth are fixedly installed on the top plate at equal distances. The top plate and the top teeth are located below the first screen and the second screen, and the top teeth are slidably connected to the first screen and the second screen.

[0009] Furthermore, the displacement assembly in the mounting groove includes a screw and a motor. The motor is fixedly mounted on the side of the shell, the screw is rotatably mounted in the mounting groove, the screw is threadedly connected to the slider, and the screw is fixedly connected to the output shaft of the motor.

[0010] Furthermore, the upper surfaces of the mounting frame and the top plate are both arc-shaped.

[0011] Furthermore, a telescopic protective cover is installed on the slider, the telescopic protective cover is connected to the shell, and the telescopic protective cover is slidably connected in the installation groove.

[0012] Furthermore, a buffer unit for mitigating the impact force of screened materials is installed in the shell, and the buffer unit includes a support frame and a guide plate. The guide plate is rotatably installed in the shell, the guide plate is located above the first screen and below the feed pipe, a movable seat is installed on the guide plate, the support frame is installed on the upper surface of the shell, a damping rod is rotatably installed at the lower end of the support frame, the telescopic end of the damping rod is rotatably connected to the movable seat, and a spring is sleeved on the damping rod.

[0013] Furthermore, a first material guide box and a second material guide box are installed on the side of the shell, the opening directions of the first material guide box and the second material guide box are opposite, the first material guide box is connected to the first material outlet, and the second material guide box is connected to the second material outlet.

[0014] Furthermore, a dust suction pipe is installed on the upper surface of the shell, and the dust suction pipe is connected to the inside of the shell.

[0015] The beneficial effects compared with the prior art are as follows:

[0016] 1. The mounting frame is driven to move along the first screen and the second screen by a motor, a screw rod and a slider, and the top plate and the top teeth are driven to move by a hydraulic cylinder. The first screen and the second screen are pushed by the top plate and the top teeth, so that the first screen and the second screen are deformed and bulged to a certain extent, and the materials on the first screen and the second screen are pushed to disperse the materials on the first screen and the second screen, so that the materials can be better screened, and the sand and gravel blocked on the first screen and the second screen are separated by the push of the top plate and the top teeth, which effectively avoids the blockage of sand and gravel affecting the passability of the materials on the first screen and the second screen, and ensures the efficiency of the first screen and the second screen in screening sand and gravel.

[0017] 2. The guide plate is elastically supported by the support frame, damping rod, spring and movable seat, so that the guide plate can buffer the speed of the material entering the shell, reduce the impact force on the first screen when the material enters, extend the service life of the first screen, and can elastically push the material through the guide plate, so that the material is better dispersed on the first screen, so that the first screen can better screen the material and improve the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the first axial side structure of a multi-stage sand and gravel screening device described in the utility model;

[0020] Figure 2 It is a schematic diagram of the side cross-sectional structure of a shell of a multi-stage sand and gravel screening device described in the utility model;

[0021] Figure 3 The utility model is a multi-stage screening sand and gravel device Figure 2 The enlarged structural diagram at A in the middle;

[0022] Figure 4 The utility model is a multi-stage screening sand and gravel device Figure 2 The enlarged structural diagram at B in the middle;

[0023] Figure 5 It is a schematic diagram of the front cross-sectional structure of a shell of a multi-stage sand and gravel screening device described in the utility model;

[0024] Figure 6 The utility model is a multi-stage screening sand and gravel device Figure 5 The enlarged structural diagram at C in the middle;

[0025] Figure 7 The utility model is a multi-stage screening sand and gravel device Figure 5 The enlarged structural diagram at D in the middle;

[0026] Figure 8 This is a schematic diagram of the connection structure of the motor, screw rod and telescopic protective cover of a multi-stage sand and gravel screening device described in the utility model;

[0027] Fig. 9It is a schematic diagram of the second axis side structure of a multi-stage sand and gravel screening device described in the utility model.

[0028] The following are the descriptions of the reference numerals:

[0029] 1. Shell; 2. Elastic support foot mechanism; 301. Motor; 302. Mounting groove; 303. Screw; 304. Slider; 305. Mounting frame; 306. Hydraulic cylinder; 307. Top plate; 308. Top tooth; 309. Telescopic protective cover; 401. Support frame; 402. Damping rod; 403. Spring; 404. Movable seat; 405. Guide plate; 5. First screen; 6. Second screen; 7. First discharge port; 8. Second discharge port; 9. Third discharge port; 10. First material guide box; 11. Second material guide box; 12. Feed pipe; 13. Dust suction pipe; 14. Vibration mechanism. DETAILED DESCRIPTION

[0030] like Figure 1-Figure 9 As shown, a multi-stage screening sand and gravel device comprises a shell 1 for preventing the splashing of screened materials, a feed pipe 12 is fixedly installed on the upper surface of the shell 1, a first discharge port 7, a second discharge port 8 and a vibration mechanism 14 for driving the screened materials are arranged on the side of the shell 1, an elastic support foot mechanism 2 and a third discharge port 9 are installed on the lower surface of the shell 1, a first screen 5, a second screen 6 and an anti-blocking unit for cleaning the first screen 5 and the second screen 6 are fixedly installed inside the shell 1, the first screen 5 is located above the second screen 6, the lower end of the first screen 5 is located in the first discharge port 7, the lower end of the second screen 6 is located in the second discharge port 8, and the second screen 6 is located above the third discharge port 9, the vibration mechanism 14 and the elastic support foot mechanism 2 work according to the existing technology, and when working, the shell is driven by the vibration mechanism 14 The body 1, the first screen 5 and the second screen 6 are vibrated, and the material to be screened is input into the housing 1 through the feed pipe 12. The material is screened for the first time through the first screen 5, and the material screened on the first screen 5 is discharged through the first discharge port 7. The material passing through the first screen 5 falls on the second screen 6, and the material is screened again through the second screen 6. The material screened on the second screen 6 is discharged through the second discharge port 8, and the material passing through the second screen 6 falls to the bottom of the housing 1, and is discharged and collected through the third discharge port 9 to complete the screening of the material. During the screening process, the housing 1 is used to prevent dust from splashing, thereby protecting the on-site environment. During the screening process, the first screen 5 and the second screen 6 are cleaned by the anti-blocking unit, which effectively prevents sand and gravel from being stuck on the first screen 5 and the second screen 6 and affecting the screening efficiency;

[0031] like Figure 2-Figure 6 , Figure 8As shown, the anti-blocking unit in the shell 1 includes a mounting groove 302 and a mounting frame 305. The mounting groove 302 is arranged on both sides of the interior of the shell 1. A displacement component is installed in the mounting groove 302, and a slider 304 is installed on the displacement component. The slider 304 is slidably installed in the mounting groove 302. The mounting frame 305 is fixedly installed on the slider 304. A hydraulic cylinder 306 is fixedly installed on the mounting frame 305. A top plate 307 is fixedly installed on the telescopic end of the hydraulic cylinder 306. Top teeth 308 are fixedly installed on the top plate 307 at equal distances. The top plate 307 and the top teeth 308 are located below the first screen 5 and the second screen 6. The top teeth 308 are slidably connected to the first screen 5 and the second screen 6. The hydraulic cylinder 306 works by adopting the existing technology. During the screening process, the hydraulic cylinder 306 drives the top plate 307 and the top teeth 308 to move, and the top plate 307 and the top teeth 308 are used to move the first screen 5 and the second screen 6. The first screen 5 and the second screen 6 are pushed, so that the first screen 5 and the second screen 6 are deformed and bulged to a certain extent, and the materials on the first screen 5 and the second screen 6 can be pushed, so that the materials on the first screen 5 and the second screen 6 are dispersed, and the materials can be better screened, and the sand and gravel blocked on the first screen 5 and the second screen 6 are separated from the sieve holes by the push of the top plate 307 and the top teeth 308, and the slider 304 is driven by the displacement component to move along the installation groove 302, and the slider 304 drives the mounting frame 305 to move, so that the top plate 307 and the top teeth 308 clean different positions of the first screen 5 and the second screen 6 to prevent the first screen 5 and the second screen 6 from being blocked, and effectively avoid the blockage of sand and gravel affecting the passability of the material on the first screen 5 and the second screen 6, thereby ensuring the efficiency of the first screen 5 and the second screen 6 in screening sand and gravel.

[0032] like Figure 1 , Figure 4 , Figure 5 , Figure 8 , Fig. 9 As shown, the displacement assembly in the mounting groove 302 includes a screw 303 and a motor 301. The motor 301 is fixedly mounted on the side of the shell 1. The screw 303 is rotatably mounted in the mounting groove 302. The screw 303 is threadedly connected to the slider 304. The screw 303 is fixedly connected to the output shaft of the motor 301. The motor 301 operates using existing technology. The screw 303 is driven to rotate by the motor 301, and the slider 304 is driven to move by the screw 303 to adjust the position of the slider 304 in the mounting groove 302.

[0033] like Figure 6 , Figure 8 As shown, the upper surfaces of the mounting frame 305 and the top plate 307 are both arc-shaped. The arc-shaped design effectively prevents materials from accumulating on the upper surfaces of the mounting frame 305 and the top plate 307, allowing the materials that fall on the mounting frame 305 and the top plate 307 to slide off more easily.

[0034] like Figure 4-Figure 6 , Figure 8 As shown, a telescopic protective cover 309 is installed on the slider 304, the telescopic protective cover 309 is connected to the shell 1, and the telescopic protective cover 309 is slidably connected in the installation groove 302. The telescopic protective cover 309 adopts the existing technology, and the telescopic protective cover 309 is driven to move by the slider 304. The installation groove 302 is protected by the telescopic protective cover 309 to prevent materials from entering the installation groove 302.

[0035] like Figure 5 , Figure 7 As shown, a buffer unit for mitigating the impact of screening materials is installed in the shell 1, and the buffer unit includes a support frame 401 and a guide plate 405. The guide plate 405 is rotatably installed in the shell 1, and the guide plate 405 is located above the first screen 5 and below the feed pipe 12. A movable seat 404 is installed on the guide plate 405. The support frame 401 is installed on the upper surface of the shell 1. A damping rod 402 is rotatably installed at the lower end of the support frame 401. The telescopic end of the damping rod 402 is rotatably connected to the movable seat 404. A spring 403 is sleeved on the damping rod 402. The damping rod 402, the spring 403 and the movable seat 404 are used to control the guide plate 405 to move. The flow plate 405 is elastically supported. When working, the material transported by the feed pipe 12 falls onto the guide plate 405, and the guide plate 405 blocks the material, reduces the speed of the material, and effectively reduces the impact of the material on the first screen 5. When the guide plate 405 is impacted, the guide plate 405 compresses the damping rod 402 and the spring 403. Under the action of the elastic force of the spring 403, the guide plate 405 applies a reverse force to the material, and the guide plate 405 pushes the material, so that the material is dispersed and falls on the first screen 5, avoiding material accumulation, so that the first screen 5 can better screen the material and improve the screening efficiency.

[0036] like Figure 1 , Figure 5 , Fig. 9 As shown, a first material guide box 10 and a second material guide box 11 are installed on the side of the shell 1, and the opening directions of the first material guide box 10 and the second material guide box 11 are opposite. The first material guide box 10 is connected to the first discharge port 7, and the second material guide box 11 is connected to the second discharge port 8. The material discharged from the first discharge port 7 enters the first material guide box 10, and the material discharged from the second discharge port 8 enters the second material guide box 11. The materials are discharged to different positions through the first material guide box 10 and the second material guide box 11, which is convenient for classifying and collecting different materials.

[0037] like Figure 1 , Figure 2 , Figure 5As shown, a dust suction pipe 13 is installed on the upper surface of the shell 1, and the dust suction pipe 13 is connected to the inside of the shell 1. The dust suction pipe 13 is connected to an external dust suction device. During the screening process, the external dust suction device extracts and processes the flying dust inside the shell 1 through the dust suction pipe 13 to prevent the dust from flying and polluting the working environment.

[0038] Working principle: Figure 1 , Figure 5 , Figure 7 , Fig. 9 As shown, the material to be screened is added into the housing 1 through the feed pipe 12, and the material transported by the feed pipe 12 falls on the guide plate 405, and the guide plate 405 blocks the material. When the guide plate 405 is impacted, the guide plate 405 compresses the damping rod 402 and the spring 403. Under the action of the elastic force of the spring 403, the guide plate 405 applies a reverse force to the material, and the guide plate 405 pushes the material, so that the material is dispersed and falls on the first screen 5;

[0039] like Figure 1 , Figure 2 , Figure 5 , Fig. 9 As shown, the housing 1, the first screen 5 and the second screen 6 are driven to vibrate by the vibration mechanism 14, the material is screened for the first time by the first screen 5, the material screened on the first screen 5 is discharged through the first discharge port 7, and enters the first material guide box 10, the material passing through the first screen 5 falls on the second screen 6, the material is screened again by the second screen 6, the material screened on the second screen 6 is discharged through the second discharge port 8, and enters the second material guide box 11, the material passing through the second screen 6 falls to the bottom of the housing 1, the screened material is discharged and collected by the first material guide box 10, the second material guide box 11 and the third discharge port 9, and the screening of the material is completed;

[0040] like Figure 1-Figure 6 , Figure 8 , Fig. 9 As shown, the hydraulic cylinder 306 drives the top plate 307 and the top teeth 308 to move, and the top plate 307 and the top teeth 308 push the first screen 5 and the second screen 6, so that the first screen 5 and the second screen 6 are deformed and bulged to a certain extent, and the materials on the first screen 5 and the second screen 6 can be pushed, so that the materials on the first screen 5 and the second screen 6 are dispersed, and the sand and gravel blocked on the first screen 5 and the second screen 6 are separated from the sieve holes, so that the first screen 5 and the second screen 6 can better screen the materials, and the motor 301 drives the screw 303 to rotate, and the screw 303 drives the slider 304 to move, and the position of the slider 304 in the installation groove 302 is adjusted, so that the top plate 307 and the top teeth 308 can clean different positions of the first screen 5 and the second screen 6;

[0041] At the same time, if Figure 1 , Figure 2 , Figure 5 As shown, the flying dust is blocked by the shell 1, and the external dust suction device extracts the flying dust inside the shell 1 through the dust suction pipe 13 for treatment.

[0042] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A multi-stage sand and gravel screening device, characterized in that: The invention comprises a shell (1) for preventing the splashing of screened materials, wherein a feed pipe (12) is fixedly mounted on the upper surface of the shell (1), a first discharge port (7), a second discharge port (8) and a vibration mechanism (14) for driving the screened materials are arranged on the side of the shell (1), an elastic support foot mechanism (2) and a third discharge port (9) are mounted on the lower surface of the shell (1), a first screen (5), a second screen (6) and an anti-blocking unit for cleaning the first screen (5) and the second screen (6) are fixedly mounted inside the shell (1), the first screen (5) is located above the second screen (6), the lower end of the first screen (5) is located in the first discharge port (7), the lower end of the second screen (6) is located in the second discharge port (8), and the second screen (6) is located above the third discharge port (9); The anti-blocking unit in the housing (1) comprises a mounting groove (302) and a mounting frame (305); the mounting groove (302) is arranged on both sides of the housing (1); a displacement assembly is installed in the mounting groove (302); a slider (304) is installed on the displacement assembly; the slider (304) is slidably installed in the mounting groove (302); the mounting frame (305) is fixedly installed on the slider (304); a hydraulic cylinder (306) is fixedly installed on the mounting frame (305); a top plate (307) is fixedly installed on the telescopic end of the hydraulic cylinder (306); top teeth (308) are fixedly installed on the top plate (307) at equal distances; the top plate (307) and the top teeth (308) are located below the first screen (5) and the second screen (6); the top teeth (308) slidably connect the first screen (5) and the second screen (6).

2. A multi-stage sand and gravel screening device according to claim 1, characterized in that: The displacement assembly in the installation groove (302) comprises a screw rod (303) and a motor (301), wherein the motor (301) is fixedly mounted on a side surface of the housing (1), and the screw rod (303) is rotatably mounted in the installation groove (302), the screw rod (303) is threadedly connected to the slider (304), and the screw rod (303) is fixedly connected to an output shaft of the motor (301).

3. A multi-stage sand and gravel screening device according to claim 1, characterized in that: The upper surfaces of the mounting frame (305) and the top plate (307) are both arc-shaped.

4. A multi-stage sand and gravel screening device according to claim 1, characterized in that: A telescopic protective cover (309) is installed on the sliding block (304); the telescopic protective cover (309) is connected to the housing (1); and the telescopic protective cover (309) is slidably connected in the installation groove (302).

5. The multi-stage sand and gravel screening device according to claim 1 is characterized in that: A buffer unit for mitigating the impact force of screened materials is installed in the shell (1), and the buffer unit comprises a support frame (401) and a guide plate (405). The guide plate (405) is rotatably installed in the shell (1), and the guide plate (405) is located above the first screen (5) and below the feed pipe (12). A movable seat (404) is installed on the guide plate (405). The support frame (401) is installed on the upper surface of the shell (1). A damping rod (402) is rotatably installed at the lower end of the support frame (401). The telescopic end of the damping rod (402) is rotatably connected to the movable seat (404), and a spring (403) is sleeved on the damping rod (402).

6. A multi-stage sand and gravel screening device according to claim 1, characterized in that: A first material guide box (10) and a second material guide box (11) are mounted on the side of the shell (1); the opening directions of the first material guide box (10) and the second material guide box (11) are opposite; the first material guide box (10) is connected to the first material outlet (7), and the second material guide box (11) is connected to the second material outlet (8).

7. The multi-stage sand and gravel screening device according to claim 1, characterized in that: A dust suction pipe (13) is installed on the upper surface of the shell (1), and the dust suction pipe (13) is connected to the interior of the shell (1).

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