CN110683736A

CN110683736A - Piston extrusion type water-sand separation device

Info

Publication number: CN110683736A
Application number: CN201910957631.5A
Authority: CN
Inventors: 江朝华; 赵爱星; 覃昌佩; 陈宇航; 王家奇; 孟庆亮; 吴侦源; 钟智辉
Original assignee: Hohai University HHU
Current assignee: Hohai University HHU
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-01-14

Abstract

The invention discloses a piston extrusion type water-sand separation device in the technical field of comprehensive utilization of dredged soil, and aims to solve the technical problems that most of dredged soil is treated in a mode of external throwing, the comprehensive utilization level is not high, and adverse effects are caused on marine environment and water area ecology in the prior art. The device comprises a shell and a sand inlet cover, wherein the shell is provided with a sand outlet, a sand inlet matched with the sand inlet cover and a filter screen for discharging water in sand; the shell is also internally provided with a heating component for drying the sand and a conveying component for conveying the sand to the sand outlet.

Description

Piston extrusion type water-sand separation device

Technical Field

The invention relates to a piston extrusion type water-sand separation device, and belongs to the technical field of comprehensive utilization of dredged soil.

Background

Dredged soil has been considered as waste for a long time, and a large amount of dredged soil is treated in an external throwing mode, which has certain influence on marine environment and water area ecology. On the basis of a great deal of scientific research and engineering practice, the idea that "dredged soil is a usable resource" has been accepted by various social circles, and the call for making full use of dredged soil is increasing. The dredged soil is reasonably treated, so that the influence on the environment can be reduced, a large amount of land resources can be increased, industrial, agricultural and living land is provided, the contribution is made to the sustainable development of national economy, and the harmonious development of people and nature is realized.

At present, in the maintenance dredging engineering of the channel at the downstream of the Yangtze river, the comprehensive utilization of the dredged soil is mainly positioned for hydraulic filling and land reclamation. In recent years, with the construction of deep-water channels of Yangtze river, the annual maintenance dredging amount of the channels of Yangtze river, particularly the channels at the lower part of Yangtze river, is gradually increased. And forecasting year-old dredging amount near 2000 ten thousand m high speed cultivation according to the deepwater channel commissioning maintenance engineering of 12.5m at the lower reaches of the Yangtze river and the channel maintenance engineering at the lower reaches of the Yangtze river. Although part of dredged soil is also backfilled by a bow blowing method, the volume is limited, and most of dredged soil is still treated by an external throwing method. In order to promote ecological protection of engineering construction, the characteristics of the dredging soil of the Yangtze river channel are combined, and the comprehensive utilization of the dredging soil resource is necessary to be fully researched and developed. In order to ensure the use quality of the dredged soil and change the dredged soil into valuable things, water-sand separation measures in the process of transporting the dredged soil and research and development of key water-sand separation equipment need to be considered.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a piston extrusion type water-sand separation device to solve the technical problems that most of dredged soil is treated in an external throwing mode in the prior art, the comprehensive utilization level is not high, and adverse effects are caused to the marine environment and the water area ecology.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a piston extrusion type water-sand separation device comprises a shell and a sand inlet cover, wherein the shell is provided with a sand outlet, a sand inlet matched with the sand inlet cover and a filter screen for discharging water in sand, the inner wall of the shell is connected with a piston in a sliding mode, the piston is in transmission connection with a power output end of a first driving source, and the first driving source drives the piston to slide in the shell; the shell is also internally provided with a heating component for drying the sand and a conveying component for conveying the sand to the sand outlet.

Further, the casing still is equipped with the pressure-bearing net that is prepared by the resistance to compression material, the pressure-bearing net is located the outside of filter screen, the resistance to compression material includes the metal, the pressure-bearing net includes the wire netting.

Further, still including locating the loading funnel in the casing outside, loading funnel fixed connection is around advancing the sand mouth, the roof of casing is located to the sand mouth.

Further, still including locating the drainage slope in the casing outside, the drainage slope is located the filter screen below, the lateral wall of casing is located to the filter screen.

Further, the lateral wall bottom of casing is located to the sand outlet, transport unit includes vertical auger shaft and the horizontal auger shaft of direction of delivery orientation towards the sand outlet and locate the casing bottom that direction of delivery is down, vertical auger shaft is connected with the power take off end transmission of second driving source, horizontal auger shaft is connected with the power take off end transmission of third driving source.

Further, the second drive source or/and the third drive source comprises a motor.

Further, the heating part is arranged at the bottom of the shell and comprises an electric heating film.

Further, shells inner wall is equipped with and is no less than a pair of guide slot, the piston lateral wall is equipped with and is no less than a pair of pulley with guide slot looks adaptation, and the piston passes through pulley and shells inner wall's guide slot sliding connection.

Further, an induced draft fan is further arranged in the shell.

Further, the first driving source includes a cylinder.

Compared with the prior art, the invention has the following beneficial effects: promote the piston through first driving source and remove extrusion grit in the casing right, extrude most moisture in the grit, the rethread heater block carries out drying process to the grit after the extrusion, carries out the grit after drying out through conveyor components at last. The device adopts a piston extrusion dehydration mode, obviously improves the water-sand separation efficiency and effect, is beneficial to improving the use quality of the dredged soil, changes waste into valuable, and avoids the adverse effect of the dredged soil treatment in an external throwing mode on the marine environment and water area ecology.

Drawings

FIG. 1 is a front view of an embodiment of the present invention;

FIG. 2 is a top view of an embodiment of the present invention;

FIG. 3 is a front view of the piston in an embodiment of the present invention;

FIG. 4 is a left side view of the housing in an embodiment of the present invention;

FIG. 5 is a front view of the sand inlet cover in an embodiment of the invention.

In the figure: 1. a housing; 2. a filter screen; 3. a pressure-bearing net; 4. a piston; 41. a pulley; 5. a drainage ramp; 6. a heating member; 7a, a second drive source; 7b, a third driving source; 8. a sand inlet; 9. a sand outlet; 10. a transverse auger shaft; 11. a longitudinal auger shaft; 12. a guide groove; 13. an induced draft fan; 14. a sand inlet cover; 15. a charging hopper.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

The invention provides a piston extrusion type water-sand separation device, as shown in figures 1 and 2, which are respectively a front view and a top view of an embodiment of the invention, the device comprises a housing 1 with a cuboid shape, a square sand inlet cover 14 and a drainage slope 5;

the left side of the shell 1 is open, a large piston 4 enters the shell 1 from the left side and is in sliding connection with the shell, the piston 4 is in transmission connection with a power output end of a first driving source, the first driving source drives the piston 4 to slide left and right in the shell 1, the piston 4 is matched with the shell 1, and the water-containing sand and stone squeezing and draining function of the water-containing sand and stone poured into the shell 1 is achieved.

The right wall of the shell 1 is provided with a plurality of layers of filter screens 2, a plurality of layers of pressure-bearing screens 3 and a sand outlet 9, water discharged after the piston 4 extrudes the sand is discharged outwards through the filter screens 2, the aperture of each filter screen 2 is smaller than the diameter of the processed sand, so that the sand is prevented from leaking out of meshes of the filter screens 2 in the extrusion and drainage process, and the sand filtering function is realized; the sand filtering effect is further enhanced by arranging the multiple layers of filter screens 2, the area of each filter screen 2 is just enough to cover the hollow part of the right wall of the shell 1, and the edge of each filter screen 2 is bonded on the shell 1 by industrial glue; the pressure-bearing net 3 is arranged on the outer side of the filter screen 2, the area of the pressure-bearing net 3 is approximately the same as that of the filter screen 2, bolts are adopted to penetrate through meshes of the pressure-bearing net 3 and then are nailed into the shell 1 for fixing, the pressure-bearing net 3 is usually a metal net with enough compressive strength, most of extrusion force from sand can be borne by the filter screen 2, and the filter screen 2 is prevented from generating large displacement, deformation and even breakage; the outside right side of casing 1 is equipped with the air-blower, and before the extrusion begins next time, the air-blower work blows away adnexed grit on the filter screen 2 to avoid the grit to block up filter screen 2 and pressure-bearing net 3, influence its extrusion drainage effect. In this embodiment, the pressure-bearing net 3 is a wire net, and the arrangement of multiple layers of pressure-bearing nets 3 is beneficial to enhancing the pressure-resisting effect; the sand outlet 9 is arranged below the filter screen 2 and the pressure bearing screen 3, and the sand outlet 9 is communicated with the bottom of the inner side of the shell 1. The drainage slope 5 is arranged at the lower end of the right side of the shell 1, the initial width of the drainage slope is the same as that of the filter screen 2, the inclined surface of the drainage slope 5 can be made into a shape which is gradually sunken from the edge to the middle so as to be beneficial to concentrating water flow and facilitating treatment, and can also be made into a concave surface which is gradually narrowed, and a drainage pipeline or a detachable plastic drainage pipe can be erected at the tail end of the drainage slope.

A square sand inlet 8 is arranged close to the right side of the top wall of the shell 1, and a charging funnel 15 is fixedly connected around the sand inlet 8, so that sand and stone can be conveniently poured into the sand inlet 8 through the charging funnel 15, and the pouring efficiency of the sand and stone can be ensured; the sand inlet cover 14 is matched with the sand inlet 8, and the sand inlet cover 14 can just cover the sand inlet 8.

A heating part 6 is arranged at the bottom of the right half side in the shell 1, in the embodiment, the heating part 6 is an electrothermal film, and can be quickly heated after being electrified to dry gravels which are squeezed and drained; the electrothermal film is free of oxidation when heated, the heating temperature can reach 100 ℃, and meanwhile, the sand inlet cover 14 needs to be lifted away, so that steam generated by heating can be rapidly discharged from the sand inlet 8, and meanwhile, part of the steam is discharged through the filter screen 2 on the right side of the shell 1. The top is equipped with a plurality of horizontal auger shafts 10 on the bottom of the right half side of

casing

1, and 1 right side wall of casing left side is equipped with a plurality of vertical auger shafts 11, vertical auger shaft 11 is connected with the power take off transmission of second driving source 7a, horizontal auger shaft 10 is connected with the power take off transmission of third driving source 7b, and in this embodiment, second driving source 7a and third driving source 7b are the motor, and when the motor drove vertical auger shaft 11 and horizontal auger shaft 10 and rotate, vertical auger shaft 11 carried the grit downwards, and horizontal auger shaft 10 carries the grit right side to send out all grits in the casing 1 through sand outlet 9.

More specifically, as shown in fig. 3, which is a front view of the piston according to the embodiment of the present invention, the cross section of the piston 4 is square, and four pulleys 41 are disposed at the right end of the piston 4, and the four pulleys 41 are symmetrically distributed along the axial direction of the piston 4 and are respectively located on the upper, lower, front and rear side walls of the piston 4. As shown in fig. 4, which is a left side view of the housing in the embodiment of the present invention, the cross sections of the inner wall and the outer wall of the housing 1 are both square, the inner wall of the housing 1 is provided with four guide grooves 12 along the axial direction thereof, the number of the guide grooves 12 is four, that is, the upper, lower, front and rear inner walls of the housing 1 are respectively provided with one, and the four guide grooves 12 are symmetrically distributed. The four pulleys 41 are correspondingly clamped in the four guide grooves 12, and the piston 4 slides left and right along the guide grooves 12 through the pulleys 41, so that the friction resistance in the sliding process of the piston 4 is reduced. Still be equipped with draught fan 13 in the

casing

1, 12 right side terminals in the guide slot are located to draught fan 13, and draught fan 13 is the liftable formula, and after 4 extrusion work of piston accomplished, draught fan 13 begins work, blows away remaining grit in the guide slot 12 to prevent to block up guide slot 12, influence the next extrusion work of piston 4.

More specifically, as shown in fig. 5, which is a front view of the sand inlet cover according to the embodiment of the present invention, the sand inlet cover 14 is composed of three parts, a, b, and c, where a is a cube whose length is slightly smaller than the sand inlet 8, b is a cuboid whose length and width are both larger than the sand inlet 8, and a and b are mutually matched to cover the sand inlet 8 and radially limit itself, and simultaneously prevent the sand inlet cover 14 from sliding into the housing 1 from the sand inlet 8; c is a ring so that the hoist lifts the sand inlet cover 14 through the ring.

The specific working mode of the device is as follows: firstly, a crane is used for lifting a sand inlet cover 14 above a shell 1 away, sand is filled into a sand inlet 8 through a charging hopper 15, and after the sand is filled, the crane is used for lifting the sand inlet cover 14 to close the sand inlet 8; then, starting a first driving source to push the piston 4 to move rightwards in the shell 1 to extrude the sand, wherein most of moisture in the sand is seeped out of the filter screen 2 and is discharged through the drainage slope 5 after the sand is extruded; then, starting a heating part 6 to dry the sandstone with the remarkably reduced water content, wherein the heating part 6 is an electrothermal film laid at the bottom of the right half side in the shell 1, a hot air duct structure is adopted, the heat transfer mode is intensified convection, the temperature can be rapidly raised after electrification, the heating is free of oxidation during heating, the heating temperature can reach 100 ℃, and when the heating is carried out, the heating part needs to be lifted away from a sand inlet cover 14 so as to facilitate the rapid discharge of water vapor from a sand inlet 8; after drying, starting a second driving source to drive the longitudinal auger shaft 11 to rotate at a high speed, continuously sending dry sand out of the sand outlet 9, and when the height of a sand pile in the shell 1 is lower, starting a third driving source to drive the transverse auger shaft 10 to rotate at a high speed, transversely conveying the sand at the bottom in the shell 1 to the right to the sand outlet 9 and sending out; and finally, starting a first driving source to pull the piston 4 to move leftwards in the shell 1, starting the induced draft fan 13 and the blower, and blowing away residual sand to prevent the residual sand from blocking the guide groove 12, the filter screen 2 and the pressure-bearing screen 3.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The piston extrusion type water-sand separation device is characterized by comprising a shell (1) and a sand inlet cover (14), wherein the shell (1) is provided with a sand outlet (9), a sand inlet (8) matched with the sand inlet cover (14) and a filter screen (2) used for discharging moisture in sand, the inner wall of the shell (1) is connected with a piston (4) in a sliding manner, the piston (4) is in transmission connection with a power output end of a first driving source, and the first driving source drives the piston (4) to slide in the shell (1); the shell (1) is also internally provided with a heating component (6) for drying the sand and a conveying component for conveying the sand to the sand outlet (9).

2. The piston extrusion type water-sand separating device according to claim 1, wherein the shell (1) is further provided with a pressure bearing net (3) made of a pressure-resistant material, the pressure bearing net (3) is located on the outer side of the filter screen (2), the pressure-resistant material comprises metal, and the pressure bearing net (3) comprises an iron wire net.

3. The piston extrusion type water-sand separating device of claim 1, further comprising a charging funnel (15) arranged on the outer side of the shell (1), wherein the charging funnel (15) is fixedly connected around the sand inlet (8), and the sand inlet (8) is arranged on the top wall of the shell (1).

4. The piston extrusion type water-sand separation device according to claim 1, further comprising a drainage slope (5) arranged on the outer side of the shell (1), wherein the drainage slope (5) is located below the filter screen (2), and the filter screen (2) is arranged on the side wall of the shell (1).

5. The piston extrusion type water-sand separation device according to any one of claims 1 to 4, wherein the sand outlet (9) is formed in the bottom of the side wall of the housing (1), the conveying component comprises a longitudinal auger shaft (11) with a downward conveying direction and a transverse auger shaft (10) with a downward conveying direction facing the sand outlet (9) and arranged at the bottom of the housing (1), the longitudinal auger shaft (11) is in transmission connection with the power output end of the second driving source (7 a), and the transverse auger shaft (10) is in transmission connection with the power output end of the third driving source (7 b).

6. The piston squeeze type water-sand separating device according to claim 5, wherein the second driving source (7 a) or/and the third driving source (7 b) comprises a motor.

7. The piston extrusion type water-sand separation device according to claim 5, wherein the heating part (6) is arranged at the bottom of the shell (1), and the heating part (6) comprises an electrothermal film.

8. The piston extrusion type water-sand separating device according to any one of claims 1 to 4, wherein no less than one pair of guide grooves (12) are formed in the inner wall of the shell (1), no less than one pair of pulleys (41) matched with the guide grooves (12) are formed in the side wall of the piston (4), and the piston (4) is in sliding connection with the guide grooves (12) in the inner wall of the shell (1) through the pulleys (41).

9. The piston extrusion type water-sand separation device according to claim 8, wherein an induced draft fan (13) is further arranged in the shell (1).

10. The piston extrusion type water-sand separation device according to any one of claims 1 to 4, wherein the first drive source includes a cylinder.