A multi-stage screening and distribution conveying device for port dredged materials

Abstract

This invention relates to the field of port dredging technology, specifically a multi-stage screening and distribution conveying device for port dredged materials. The device includes a conveying cylinder, a mixing assembly, a screw conveyor, and a screening assembly. The conveying cylinder has a discharge port at its bottom. The mixing assembly includes a vertically arranged mixing shaft, the bottom of which extends into the interior of the conveying cylinder and is connected to a material-pushing plate. The discharge port is connected to the input end of the screw conveyor. The screening assembly includes a screening box, a screen, a separator, a feeding component, a receiving box, and a feed pipe. The separator and the inner wall of the screening box together form a first storage chamber. The outer walls of the receiving box, the screening box, and the separator together form a second storage chamber. In use, the mixing shaft drives the material-pushing plate to rotate, agitating and pushing the dredged soil at various locations within the conveying cylinder, preventing blockage. The dredged soil in the conveying cylinder enters the screw conveyor through the discharge port and is finally conveyed to the subsequent processing location by the screw conveyor.

Description

Technical Field

[0001] This invention relates to the field of port dredging technology, specifically to a multi-stage screening, distribution, and conveying device for port dredged materials. Background Technology

[0002] Port dredging addresses natural siltation, ensures safe navigation for ships, and maintains operational efficiency, while also yielding dredged material. After processing, this dredged material can be used for soil improvement, building material production, or energy recovery, achieving resource utilization. Therefore, the transfer and transportation of dredged material is necessary. To prevent blockages during transport, the conveying device needs an internal agitation structure. For example, Chinese utility model patent application number CN202421665146.3 provides a dredged soil transfer device for river dredging. In this device, a tilting device is fixedly connected to the middle of the right end of the discharge bucket. When the tilting device is in operation, a drive motor rotates a rotating rod, causing several tilting plates to rotate accordingly. As the dredged soil enters from above the discharge bucket, the rotating tilting plates continuously agitate and push the dredged soil.

[0003] The drawback of this device is that the rotating rod is horizontally positioned, and its central axis is perpendicular to the central axis of the discharge bucket. When the rotating rod drives the flap to rotate, a large gap is created between the flap and the inner bottom edge of the discharge bucket. Regardless of how the flap rotates, it cannot agitate or push the dredged soil at the inner bottom edge of the discharge bucket, thus causing blockage of the dredged soil inside the discharge bucket. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-stage screening and distribution conveying device for port dredged materials. The stirring shaft is vertically arranged and coincides with the central axis of the conveying cylinder. When the stirring shaft drives the material-pulling plate to rotate, the dredged soil in each position in the conveying cylinder can be stirred and pushed, and the dredged soil will not cause blockage.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage screening and distribution conveying device for port dredged materials, comprising: a conveying cylinder with a discharge port at its bottom; a stirring assembly disposed above the conveying cylinder, the stirring assembly including a vertically arranged stirring shaft, the stirring shaft coinciding with the central axis of the conveying cylinder, the bottom of the stirring shaft extending into the interior of the conveying cylinder and connected to a material-pushing plate, the cross-sectional shape of the material-pushing plate matching the cross-sectional shape of the conveying cylinder; a screw conveyor disposed below the conveying cylinder, the discharge port being connected to the input end of the screw conveyor; and a screening assembly comprising: a screening box disposed above the conveying cylinder, the screening box having a frustum-shaped structure with a top width greater than the bottom width, the screening box... A screen is provided on the side wall of the sieve box; an isolation member is fixedly installed at the bottom of the sieve box, and a material conveying channel is provided at the center of the isolation member. The stirring shaft is located in the material conveying channel, and a feeding member is provided between the material conveying channel and the inner side wall of the sieve box. The isolation member and the inner side wall of the sieve box together form a first storage cavity; a receiving box is located between the sieve box and the material conveying cylinder, and there is a gap between the receiving box and the sieve box. The receiving box has a frustum-shaped structure, and the top width is greater than the bottom width. The receiving box, the outer side wall of the sieve box, and the outer side wall of the isolation member together form a second storage cavity; a feed pipe has a first end located on the outside of the receiving box, and a second end extending into the interior of the sieve box and facing the inner side wall of the sieve box.

[0006] Preferably, a pusher is provided between the feeding plate and the inner wall of the feeding cylinder. The cross-sectional shape of the pusher matches the cross-sectional shape of the feeding cylinder. The top of the pusher is fixedly connected to the bottom of the sleeve. The sleeve is fitted onto the outer surface of the stirring shaft and can slide along the outer surface of the stirring shaft. The top of the stirring shaft is connected to the output end of the first drive assembly, and the top of the sleeve is connected to the output end of the second drive assembly.

[0007] Preferably, the feeding component includes a feeding curved plate, the side wall of the isolation component is provided with a notch, the feeding curved plate is inclined, the top of the feeding curved plate is fixedly connected to the inner side wall of the screening box, the bottom of the feeding curved plate is fixedly connected to the inner bottom surface of the notch, a feeding plate is provided between the feeding curved plate and the feed pipe, the bottom of the feeding plate abuts against the bottom surface of the first storage cavity, and the top of the feeding plate is higher than the top of the feeding curved plate.

[0008] Preferably, the feed pipe is inclined, the height of the first end of the feed pipe is lower than the height of the second end, the inner sidewall of the screening box is provided with a blocking member and a guide member in sequence along the output direction of the feed pipe, and a water-blocking ring is provided at the top of the inner sidewall of the screening box.

[0009] Preferably, the blocking member has a first slope on the side wall near the feed pipe, and the guide member has a second slope on the top of the end near the feed member. The guide member is inclined, and the height of the end of the guide member near the feed member is lower than the height of the end near the blocking member.

[0010] Preferably, there are multiple screens, and the screens are provided on both sides of the blocking member and both sides of the guide member.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] (i) In this invention, the stirring shaft is vertically arranged and coincides with the central axis of the conveying cylinder. When the stirring shaft drives the material-pushing plate to rotate, the dredged soil at various positions in the conveying cylinder can be stirred and pushed, and the dredged soil will not become blocked. The dredged soil in the conveying cylinder then enters the screw conveyor through the discharge port, and is finally transported to the subsequent processing location by the screw conveyor.

[0013] (ii) The present invention also includes a screening component, which includes a screening box, a screen, a separator, a feeding component, a receiving box, and a feed pipe. The screening component can screen out shellfish and reef fragments in the dredged sediment before it enters the conveying cylinder, and reduce the water content of the dredged sediment, thereby improving the effective carrying capacity of subsequent transport vehicles and saving energy and protecting the environment.

[0014] (iii) In this invention, the feed pipe is inclined, so when the dredged sediment is sprayed out from the second end of the feed pipe, it will first move upward in a spiral shape, and then move downward in a spiral shape. This prolongs the time for the dredged sediment to move along the inner wall of the screening box, so that shellfish and reef debris have sufficient time to separate from the dredged sediment. Attached Figure Description

[0015] Figure 1 This is an isometric view of the present invention;

[0016] Figure 2 This is a front sectional view of the present invention;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is an isometric sectional view of the feed cylinder in this invention;

[0019] Figure 5 This is an isometric view of the stirring assembly and the first driving assembly in this invention;

[0020] Figure 6 This is an isometric view of the pusher, sleeve, and first drive assembly in this invention;

[0021] Figure 7 This is an isometric view of the screening component in this invention;

[0022] Figure 8 This is an isometric view of the first part of the screening box in this invention;

[0023] Figure 9 This is an isometric view of the second part of the screening box in this invention;

[0024] Figure 10 This is an isometric view of the water-retaining ring in this invention;

[0025] Figure 11 This is an isometric view of the isolation component in this invention;

[0026] Figure 12 This is an isometric view of the receiving box in this invention.

[0027] The reference numerals in the figures include:

[0028] 1-Feeding cylinder, 11-Discharge port, 2-Mixing assembly, 21-Mixing shaft, 22-Pulling plate, 3-Screw conveyor, 4-Pushing frame, 5-Sleeve, 6-First drive assembly, 7-Second drive assembly, 8-Screwing assembly, 81-Screwing box, 811-Blocking component, 8111-First inclined surface, 812-Guide component, 8121-Second inclined surface, 813-Water baffle ring, 82-Screen, 83-Isolation component, 831-Feeding channel, 832-Notch, 84-Feeding component, 841-Feeding curved plate, 842-Feeding plate, 85-First storage chamber, 86-Receiving box, 87-Second storage chamber, 88-Feeding pipe, 9-Base. Detailed Implementation

[0029] 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.

[0030] Please see Figures 1-12This invention provides a technical solution: a multi-stage screening and distribution conveying device for port dredged materials, comprising a conveying cylinder 1, a mixing assembly 2, and a screw conveyor 3. The bottom of the conveying cylinder 1 is provided with a discharge port 11, which is connected to the input end of the screw conveyor 3. The mixing assembly 2 includes a mixing shaft 21 and several material-pushing plates 22. The mixing shaft 21 is vertically arranged, and there are several material-pushing plates 22 arranged radially. Since the mixing shaft 21 coincides with the central axis of the conveying cylinder 1, the shape of the material-pushing plates 22 can match the shape of the conveying cylinder 1, eliminating the need for cutting or modification. The gap between the material-pushing plates 22 and the inner wall of the conveying cylinder 1 is very small, preventing collision during rotation. In use, the dredged soil first enters from the top of the conveying cylinder 1, followed by the operation of the mixing assembly 2. When the mixing shaft 21 rotates, it drives the material-pushing plates 22 to rotate as well. The material-pulling plate 22 can agitate and push the dredged soil in various positions within the conveying cylinder 1, preventing blockage. The dredged soil in the conveying cylinder 1 then enters the screw conveyor 3 through the discharge port 11, and is finally transported by the screw conveyor 3 to the subsequent processing location.

[0031] Example 1

[0032] Please see Figures 1-6 The invention also includes a first drive assembly 6 and a base 9. Both the conveying cylinder 1 and the screw conveyor 3 are fixedly connected to the base 9, which increases the stability of the invention during use. The first drive assembly 6 includes a support frame and a first motor. The support frame is fixedly mounted on top of the screw conveyor 3, and the first motor is located on top of the support frame. The output end of the first motor is connected to the top of the stirring shaft 21. When the first motor operates, it drives the stirring shaft 21 to rotate, which in turn drives the material-pushing plate 22 to rotate, agitating and pushing the dredged soil inside the conveying cylinder 1.

[0033] Please see Figures 1-6 The invention also includes a pusher frame 4, a sleeve 5, and a second drive assembly 7. The pusher frame 4 is located between the material-pushing plate 22 and the inner wall of the conveying cylinder 1. The shape of the pusher frame 4 matches the shape of the conveying cylinder 1, and the material-pushing plate 22 does not extend beyond the outside of the pusher frame 4. The sleeve 5 is fitted onto the outer surface of the stirring shaft 21. The bottom of the sleeve 5 is fixedly connected to the pusher frame 4, and the top of the sleeve 5 is rotatably connected to the support frame. The second drive assembly 7 includes a second motor, a first gear, and a second gear. The second motor is located in the middle of the support frame, and its output end is connected to the first gear. The second gear is fixedly mounted on the top of the sleeve 5, and the first gear meshes with the second gear for transmission. When the second motor operates, the first gear drives the second gear to rotate, and the second gear drives the pusher frame 4 to rotate via the sleeve 5. The pusher frame 4 can also agitate and push the dredged soil inside the conveying cylinder 1.

[0034] Please see Figures 1-6When the first motor and the second motor work at the same time, the rotation directions of the material feeding plate 22 and the material pushing frame 4 are opposite, so that the dredged soil in the conveying cylinder 1 can be subjected to forces in different directions, further enhancing the mixing effect of the dredged soil and preventing the dredged soil from becoming blocked.

[0035] Example 2

[0036] Please see Figures 1-4 and Figures 7-9 The invention also includes a screening component 8, which comprises a screening box 81, a screen 82, a separator 83, a feeding component 84, a receiving box 86, and a feed pipe 88. In addition to dredged soil, port dredged materials also include dredged sediment with high water content. This dredged sediment can also enter the conveying cylinder 1, pass through the mixing component 2, and then be transported by the screw conveyor 3. The dredged sediment contains shellfish and reef fragments. The screening component 8 can screen out the shellfish and reef fragments in the dredged sediment before it enters the conveying cylinder 1, reducing the water content of the dredged sediment, improving the effective carrying capacity of subsequent transport vehicles, and saving energy and protecting the environment.

[0037] Please see Figures 1-4 , Figures 7-9 and Figures 11-12 Both the screening box 81 and the receiving box 86 are frustum-shaped structures. A conveying channel 831 is provided at the center of the separator 83, and the feeding member 84 is located between the conveying channel 831 and the inner wall of the screening box 81. The separator 83 and the inner wall of the screening box 81 together form a first storage cavity 85, and the receiving box 86, the outer wall of the screening box 81, and the outer wall of the separator 83 together form a second storage cavity 87. The first end of the feed pipe 88 is located on the outside of the receiving box 86, and the second end of the feed pipe 88 extends into the interior of the screening box 81 and faces the inner wall of the screening box 81.

[0038] Please see Figures 1-4 , Figures 7-9 and Figures 11-12When the screening component 8 is working, the dredged sediment first enters the screening box 81 through the feed pipe 88. After the dredged sediment is ejected from the second end of the feed pipe 88, it moves in a circular motion along the inner wall of the screening box 81. Under the influence of gravity, the dredged sediment descends in a spiral shape. The volume and mass of the shellfish contained in the dredged sediment are greater than the volume and mass of the reef fragments. The friction between the shellfish and the reef fragments and the inner wall of the screening box 81 is greater than the friction between the dredged sediment and the inner wall of the screening box 81. As the dredged sediment moves along the inner wall of the screening box 81, most of the shellfish will separate from the dredged sediment first and move rapidly downwards along the inner wall of the screening box 81, eventually falling into the first storage chamber 85 for collection. The separator 83 can prevent shellfish from entering the conveying channel 831, so the shellfish will not enter the conveying cylinder 1. A small portion of the remaining shellfish, along with dredged sediment and reef debris, will pass over the surface of screen 82. The dredged sediment has low friction with screen 82, allowing it to move quickly over the surface, but the water it contains can pass through and fall into the receiving box 86. After contacting the feeder 84, the dredged sediment will move along its surface into the conveying channel 831, eventually entering the conveying cylinder 1. The shellfish and reef debris have greater friction with screen 82, causing their movement speed to decrease rapidly. Shells cannot pass through screen 82 and will fall along its surface into the first storage chamber 85 for collection. Reef debris can pass through screen 82 and fall into the second storage chamber 87 for collection. A raised ring is located at the center of the inner bottom surface of the receiving box 86 to prevent reef debris from entering the conveying cylinder 1. In use, this invention allows for the screening of dredged materials based on their physical properties before they are transferred to transport vehicles, facilitating subsequent separate recycling and distribution. Simultaneously, the dredged sediment is dehydrated as much as possible, increasing the effective carrying capacity of transport vehicles and promoting energy conservation and environmental protection.

[0039] Example 3

[0040] Based on implementation two, please refer to Figure 7 , Figure 9 and Figure 11The feeding component 84 includes a feeding curved plate 841 and a feeding plate 842. A notch 832 is provided on the side wall of the separator 83, into which the feeding curved plate 841 extends. When the dredged sludge moves along the inner wall of the screening box 81 to a position close to the feed pipe 88 again, it is blocked by the feeding plate 842. The dredged sludge first impacts the side wall of the feeding plate 842, then falls downwards to the top surface of the feeding curved plate 841, and then slides downwards along the top surface of the feeding curved plate 841. The dredged sludge eventually enters the conveying channel 831 through the notch 832 and continues to fall downwards into the conveying cylinder 1. The bottom of the feeding plate 842 abuts against the bottom surface of the first storage chamber 85, and the top of the feeding plate 842 is higher than the top of the feeding curved plate 841, therefore the dredged sludge will not cross the feeding curved plate 841 and will not move to the other side of the feeding curved plate 841.

[0041] Example 4

[0042] Based on implementation two, please refer to Figures 7-10 The feed pipe 88 is inclined, so when the dredged sediment is ejected from the second end of the feed pipe 88, it will first move upward in a spiral, and then move downward in a spiral. This prolongs the time the dredged sediment moves along the inner wall of the screening box 81, allowing sufficient time for shellfish and reef debris to separate from the dredged sediment. The inner wall of the screening box 81 is provided with a blocking member 811 and a guide member 812. The dredged sediment and reef debris can pass over the blocking member 811 during movement, while the shellfish will collide with the blocking member 811. After being impacted, the shellfish cannot continue to move with the dredged sediment, so they can quickly separate from the dredged sediment and fall downward into the first storage chamber 85 for collection. Before the dredged sediment approaches the feeding member 84, the speed of the dredged sediment will gradually decrease under the influence of friction, so the speed at which the dredged sediment falls downward will increase. The guide member 812 is located between the blocking member 811 and the feeding member 84. The guide member 812 can catch the dredged sludge falling downwards. After the dredged sludge falls onto the guide member 812, it can move along the top surface of the guide member 812 to the position of the feeding member 84, ensuring that the dredged sludge can contact the feeding member 84. The top of the inner wall of the screening box 81 is provided with a water-retaining ring 813. When the dredged sludge moves upwards in a spiral shape, it can be blocked by the water-retaining ring 813, so the dredged sludge will not move to the outside of the screening box 81.

[0043] Please see Figures 7-9The blocking member 811 has a first ramp 8111 on its side wall near the feed pipe 88. The first ramp 8111 helps the dredged sediment to quickly pass over the blocking member 811, preventing the blocking member 811 from significantly reducing the movement speed of the dredged sediment. The guide member 812 is inclined, so that after the dredged sediment falls onto the top surface of the guide member 812, it can still maintain a spiral descent and increase the speed of the dredged sediment in the horizontal direction. The top of the guide member 812 near the feed member 84 has a second ramp 8121. Before the dredged sediment leaves the guide member 812, it can rush up the second ramp 8121, so that the dredged sediment can jump upwards when it leaves the guide member 812. This ensures that the dredged sediment can first pass over the top of the feeding bend plate 841, and after colliding with the feeding plate 842, it will fall down to the top surface of the feeding bend plate 841, thus preventing the dredged sediment from moving to the bottom of the feeding bend plate 841.

[0044] Please see Figures 7-9 There are several screens 82, with screens 82 installed on both sides of the blocking member 811 and both sides of the guide member 812. This ensures that the dredged sediment can contact the screens 82 when passing through the blocking member 811 or the guide member 812, increasing the number of times that shellfish and reef debris are removed from the dredged sediment. This ensures that only the dredged sediment can contact the feeding member 84 and enter the feeding cylinder 1 through the feeding channel 831.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A port dredge material multi-stage screening and distribution conveyor apparatus, characterized by, The utility model provides a kind of material conveying device, including: Material conveying barrel, the bottom of the material conveying barrel is provided with discharge port; Stirring assembly, provided above the material conveying barrel, the stirring assembly includes vertically arranged stirring shaft, the center axis of the stirring shaft coincides with the center axis of the material conveying barrel, the bottom of the stirring shaft extends into the interior of the material conveying barrel, and is connected with the paddle, the cross-sectional shape of the paddle matches the cross-sectional shape of the material conveying barrel; Screw conveyor, provided below the material conveying barrel, the discharge port is communicated with the input end of the screw conveyor; Further comprising screening assembly, the screening assembly includes: Screening box, provided above the material conveying barrel, the screening box is circular truncated cone structure, and the width of the top is greater than the width of the bottom, the side wall of the screening box is provided with screen; Isolator, fixedly arranged at the bottom of the screening box, the center of the isolator is provided with material conveying channel, the stirring shaft is arranged in the material conveying channel, the material conveying channel and the inner side wall of the screening box are provided with feeding member, the isolator and the inner side wall of the screening box are jointly enclosed to form first storage cavity; Material receiving box, provided between the screening box and the material conveying barrel, and there is gap between the screening box, the material receiving box is circular truncated cone structure, and the width of the top is greater than the width of the bottom, the outer side wall of the material receiving box, the outer side wall of the screening box and the outer side wall of the isolator are jointly enclosed to form second storage cavity; Feed pipe, the first end of the feed pipe is arranged outside the material receiving box, the second end of the feed pipe extends to the interior of the screening box, and is directed to the inner side wall of the screening box; The feeding member includes feeding bent plate, the side wall of the isolator is provided with notch, the feeding bent plate is arranged obliquely, the top of the feeding bent plate is fixedly connected with the inner side wall of the screening box, the bottom of the feeding bent plate is fixedly connected with the inner bottom surface of the notch, the feeding bent plate and the feed pipe are provided with feeding flat plate, the bottom of the feeding flat plate abuts the bottom surface of the first storage cavity, and the top of the feeding flat plate is higher than the top of the feeding bent plate.

2. A port dredge multi-stage screening and distribution conveyor according to claim 1, characterised in that, The paddle and the inner wall of the material conveying barrel are provided with pushing frame, the cross-sectional shape of the pushing frame matches the cross-sectional shape of the material conveying barrel, the top of the pushing frame is fixedly connected with the bottom of the sleeve, the sleeve is sleeved on the outer surface of the stirring shaft and can slide along the outer surface of the stirring shaft, the top of the stirring shaft is connected with the output end of the first driving assembly, and the top of the sleeve is connected with the output end of the second driving assembly.

3. The port dredge multi-stage screening and distribution conveyor of claim 1, wherein, The feed pipe is arranged obliquely, the height of the first end of the feed pipe is lower than the height of the second end, the inner side wall of the screening box is provided with blocking member and guide member in turn along the output direction of the feed pipe, and the inner side wall of the screening box is provided with water retaining ring at the top.

4. A port dredge multi-stage screening and distribution conveyor according to claim 3, characterised in that, The blocking member is provided with first inclined surface on the side wall close to the feed pipe, the guide member is provided with second inclined surface on the top close to the feeding member, the guide member is arranged obliquely, and the height of the end close to the feeding member of the guide member is lower than the height of the end close to the blocking member.

5. A port dredge multi-stage screening and distribution conveyor according to claim 3, characterised in that, The screen has a plurality of, and the two sides of the blocking member and the two sides of the guide member are provided with the screen.

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