Sand purification system for construction

Abstract

The application discloses a construction sand purifying device and system, and belongs to the construction sand purifying field.The device comprises a cleaning tank and a supporting structure, and the cleaning tank is installed on the supporting structure; the cleaning tank is arranged in an inclined manner from top to bottom, the upper side of the cleaning tank is in an open structure, the top end of the cleaning tank is a feeding port, the bottom end is a discharging port, and the cleaning tank forms a flow channel inclined from top to bottom between the feeding port and the discharging port.In use, sand water is input into the feeding port, the sand water flows in the cleaning tank, harmful substances enter the water, and the sand water is discharged from the outlet and separated in a sand water separator, and the harmful substances are discharged together with the water.The sea sand can be purified to the river sand state before entering the sea, and can be safely used like the river sand, wherein the chloride ion content can reach 0.000% to 0.002%.The device can effectively remove the edges and corners of the machine-made sand, the needle-shaped sand and the weathered layer on the surface of the sand particles.The device has the advantages of simple structure, reliable operation and low production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of construction sand purification, in particular to a construction sand purification system. BACKGROUND

[0002] In construction engineering, a large amount of concrete and building mortar is used. Construction sand, as an important component of concrete, is used in a large amount in construction engineering. As fine aggregate of concrete, the strength, surface activity, gradation, particle shape, cleanliness, and harmful substances such as organic matter, mud, mud blocks, and chloride ion content of sand greatly affect the workability, strength, and durability of concrete, and are directly related to the quality and safety of construction engineering.

[0003] Construction sand includes natural river sand, sea sand, machine-made sand, and recycled sand. Since the invention of concrete, river sand has been used as fine aggregate of concrete. More than a hundred years of use has proved that river sand is the cheapest, safest, most reliable, and most durable fine aggregate for concrete. However, with large-scale construction use, the sand source of high-quality river sand has been basically exhausted, and people have begun to use secondary river sand containing many impurities, machine-made sand made by crushing mountain rocks, and sea sand. However, the existing available river sand basically contains many impurities; machine-made sand has many needle-like and flat-angled particles, and the sand body has poor roundness, and the surface of the sand particles contains fragments or weathering layers, which has poor workability and has an important influence on durability; sea sand contains a large amount of chloride ions and other harmful substances, which affects the durability and safety of the project. Therefore, these sands must be further cleaned and treated before they can be safely used.

[0004] At present, the main equipment for cleaning construction sand is still the traditional cleaning equipment for cleaning river sand and the cleaning system formed by combining these equipment. These equipment mainly includes spiral sand washers, wheel-bucket sand washers, chain-bucket sand washers, sand-water separators, waste material screening machines, etc. Among them, these sand washers all adopt motor-driven mode, have complex structure, low output, large power consumption, and high power energy consumption. Moreover, in complex environment, the equipment is prone to failure and damage during long-term operation, and has high maintenance cost during long-term operation.

[0005] Using traditional sand cleaning equipment to wash sea sand and machine-made sand, the equipment runs slowly, and the relative motion speed of sand and sand cleaning equipment is low during operation, and the impact and friction between sand and sand and between sand and equipment are small. It is suitable for removing mud in river sand, but it cannot effectively remove harmful substances such as machine-made sand edges and corners, needle-like particles, weathering layers, and organic matter film layers and chloride ions in sea sand, which affects the quality of machine-made sand and sea sand, and thus affects the safety and durability of concrete and mortar. SUMMARY

[0006] This invention provides a construction sand purification device and system, which has a simple structure and low cost. It can remove mud, mud lumps, chloride ions, and organic harmful substances from the surface of construction sand in a simple, fast, efficient and stable manner. It effectively reduces the sharp edges, needle-like and flaky parts, and weathered layer on the surface of manufactured sand, and rounds the sand particles. The concrete made from the treated construction sand has the advantages of good durability and low cost, and can be safely and widely used in building and municipal engineering projects.

[0007] The technical solution provided by this invention is as follows:

[0008] A construction sand purification device includes a washing tank and a supporting structure, wherein the washing tank is installed on the supporting structure, and:

[0009] The cleaning tank is arranged in a spiral structure that slopes downwards. The upper side of the cleaning tank is an open structure. The top of the cleaning tank is the inlet and the bottom is the outlet. The cleaning tank forms a flow channel with a spiral structure that slopes downwards between the inlet and the outlet.

[0010] Furthermore, the entire cleaning tank forming the spiral structure is curved, or the cleaning tank forming the spiral structure is partially curved and partially straight.

[0011] Furthermore, the support structure includes a support column and several horizontal branches. The support column is vertically arranged inside or outside the spiral structure formed by the cleaning tank. One end of each horizontal branch is mounted on the support column, and the other end is suspended in the air. The cleaning tank is installed on the horizontal branches.

[0012] Furthermore, the number of the supporting columns is one or more, and a plurality of the transverse branches are distributed on the supporting columns in a spiral structure from top to bottom, and the cleaning tank is installed on the transverse branches by clamps.

[0013] Furthermore, the support structure also includes a reinforcing diagonal brace, one end of which is fixedly connected to the support column and the other end of which is fixedly connected to the transverse branch.

[0014] Furthermore, the support structure includes multiple support units, each of which includes an inner column and an outer column. The inner column and the outer column are located on the inner and outer sides of the spiral structure formed by the cleaning tank, respectively. The inner column and the outer column are connected together by several cross braces, and the cleaning tank is installed on the cross braces.

[0015] Furthermore, the inner or outer side of the spiral-shaped cleaning tank is provided with an inspection walkway and / or guardrail, the inspection walkway and / or guardrail are installed on the supporting structure, and an inspection ladder is provided at the bottom of the inspection walkway.

[0016] Further, the spiral cleaning tank comprises an inner spiral and an outer spiral, and the maintenance walkway is located between the inner spiral and the outer spiral.

[0017] Further, a feeding hopper is arranged on the feeding port, and a bottom of the feeding hopper is communicated with the feeding port through a discharging port.

[0018] Further, the cleaning tank comprises an outer shell layer and a wear-resistant layer located in the outer shell layer, the outer shell layer and the wear-resistant layer each comprise a bottom plate and side wall plates on left and right sides, the bottom plate and the side wall plates of the outer shell layer and the wear-resistant layer each form a groove structure with an open upper side, and the groove structure of the wear-resistant layer is located in the groove structure of the outer shell layer.

[0019] Further, the cleaning tank is of an integral structure.

[0020] Alternatively, the cleaning tank is composed of multiple tank bodies which are segmented and assembled, outer sides of the front and rear ends of the bottom plate and the side wall plates of the outer shell layer of each tank body are provided with assembly flanges, adjacent two tank bodies are fixed by bolts, and reinforcing rib plates are arranged between the assembly flanges and the bottom plate and the side wall plates of the outer shell layer.

[0021] Further, the cleaning tank is provided with resistance objects for increasing the impact frequency of the sand in the cleaning tank and changing the movement direction and force of the sand.

[0022] Further, the resistance objects are concave-convex objects arranged on the bottom and / or both sides of the cleaning tank, or the resistance objects are steel bar grating arranged in the cleaning tank.

[0023] A construction sand purification system comprises a first sand-water separator and the construction sand purification device, and the discharge port of the construction sand purification device is connected with the first sand-water separator.

[0024] Further, the construction sand purification device further comprises a raw sand feeding machine, a waste material screening machine and a sand-water mixing and conveying device which are arranged in sequence.

[0025] The sand-water mixing and conveying device comprises a sand-water pool, a sand-water mixer, a suction pipeline and a suction pump, a first end of the suction pipeline is inserted into the sand-water pool, a second end of the suction pipeline is connected with the feeding port of the construction sand purification device, and the suction pump is arranged on the suction pipeline.

[0026] The number of the construction sand purification devices is one or more, when the number of the construction sand purification devices is multiple, the multiple construction sand purification devices are arranged in sequence, and one sand-water mixing and conveying device is arranged in front of the first construction sand purification device and between adjacent two construction sand purification devices.

[0027] The discharge outlet of the last construction sand purification device is connected with the first sand-water separator, or the discharge outlet of each construction sand purification device is connected with a first sand-water separator.

[0028] Further, the construction sand purification device further comprises, in sequence from front to back, an original sand feeding machine, a waste material screening machine, a sand washing machine, a second sand-water separator and a lifting feeding device.

[0029] The lifting feeding device is connected with the feeding inlet of the construction sand purification device, and a water inlet pipe is arranged at the feeding inlet of the construction sand purification device.

[0030] The number of the construction sand purification devices is one or more, when the number of the construction sand purification devices is more than one, the construction sand purification devices are arranged in sequence from front to back, and a lifting feeding device is arranged in front of the first construction sand purification device and between adjacent two construction sand purification devices.

[0031] The discharge outlet of the last construction sand purification device is connected with the first sand-water separator, or the discharge outlet of each construction sand purification device is connected with a first sand-water separator.

[0032] Further, when the number of the construction sand purification devices is more than one, the discharge outlet of each or the last construction sand purification device is connected with a sand-water collection pool.

[0033] Further, the sand-water collection pool is provided with a sand-water splash-proof device.

[0034] Further, all or part of the first sand-water separator is provided with a dehydration device.

[0035] The present application has the following advantages:

[0036] The present application can simply, quickly, efficiently and stably remove harmful substances in construction sand: when used for washing river sand, the harmful substances such as mud and mud blocks in the river sand can be effectively removed; when used for washing machine-made sand, harmful substances such as edges and corners, needle-shaped objects and weathered layers on the surface of sand particles in the machine-made sand can be effectively removed and rounded; when used for washing sea sand, harmful substances such as chloride ions and organic matter adsorbed on the surface of the sea sand can be quickly and effectively removed, the content of chloride ions in the treated sea sand can reach 0.000% to 0.002%, the sea sand can be restored to the state of river sand, and can be used safely like river sand, and the purified sea sand is superior to the corresponding industry and national construction sand standards.

[0037] The concrete made of the sand treated by the application does not cause steel bar corrosion and concrete deterioration, has good durability, and can be safely and widely applied to building and municipal engineering. Meanwhile, the application has the characteristics of simple structure, stable and reliable operation, and low cost, can satisfy cleaning of different varieties of sand, and has wide market prospect. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a perspective view of one implementation mode of the construction sand purification device of the application;

[0039] Figure 2 It is a side view of Figure 1 ;

[0040] Figure 3 It is a top view of Figure 1 ;

[0041] Figure 4 It is a perspective view of another implementation mode of the construction sand purification device of the application;

[0042] Figure 5 It is a perspective view of still another implementation mode of the construction sand purification device of the application;

[0043] Figure 6 It is a perspective view of still another implementation mode of the construction sand purification device of the application;

[0044] Figure 7 It is an explosion view of a section of the tank body of the cleaning tank;

[0045] Figure 8 It is a schematic view of the outer shell layer;

[0046] Figure 9 It is a schematic view of the wear-resistant layer;

[0047] Figure 10 It is a schematic view of one implementation mode of mode one of the construction sand purification system of the application;

[0048] Figure 11 It is a schematic view of another implementation mode of mode one of the construction sand purification system of the application;

[0049] Figure 12 It is a schematic view of the sand and water mixing and conveying device of mode one;

[0050] Figure 13 It is a schematic view of mode two of the construction sand purification system of the application;

[0051] Figure 14 It is a side view of the sand and water collection pool;

[0052] Figure 15 It is a perspective view of the sand and water collection pool. DETAILED DESCRIPTION

[0053] In order to make the technical problems, technical solutions and advantages of the present application more clear, the following will be described in detail with reference to the drawings and specific embodiments.

[0054] Embodiment 1:

[0055] The embodiment of the present application provides a construction sand purification device 100, as shown in the figure, which comprises a cleaning tank 1 and a support structure 2, the cleaning tank 1 is installed on the support structure 2, wherein: Figures 1-9

[0056] The cleaning tank 1 is arranged in a spiral structure inclined and spiraled from top to bottom, the upper side of the cleaning tank 1 is an open structure, forming a slot structure with the upper side open.

[0057] The top end of the cleaning tank 1 is an inlet 3, and the bottom end is an outlet 4, the cleaning tank 1 is a suspended sand-water mixed flow flushing channel, the cross-sectional shape of the cleaning tank 1 can be a U-shaped, semicircular, rectangular or other regular or irregular open structure, which can meet the requirements of the sand-water mixed flow in the channel for flushing, so that the cleaning tank 1 forms a spiral flushing channel inclined and spiraled from top to bottom between the inlet 3 and the outlet 4, and the sand-water mixed flow is flushed from top to bottom along the spiral flushing channel under the action of gravity.

[0058] The cleaning tank 1 forming the aforementioned spiral structure can be entirely curved, forming a spiral structure with the whole curved, or partially curved and partially linear, forming a spiral structure with part linear and part curved.

[0059] In use, the sand and water are added to the cleaning tank 1 through the inlet 3, and the mixture of sand and water is flushed at high speed from top to bottom in the spiral flushing channel of the cleaning tank 1 under the combined action of water flow force and self-gravity of sand and water, the cleaning tank 1 itself does not need to be driven by mechanical equipment, and does not need to be provided with a motor, a speed reducer and other driving devices, so that the device has simple structure, high yield, small power consumption, low power consumption, low cost, low failure rate and low maintenance cost.

[0060] ​And the mixture of sand and water will form a suspended state in the process of flow, sand particles move at high speed in water, sand and sand, sand and water, sand and the wall of the cleaning tank 1 strong collision, friction; sand and water in the process of flow through the curved part, increase the impact speed of sand, and the direction of sand and water mixed flow along the spiral washing tank constantly change, through the sand and water multi-angle change flushing, enhance the sand collision, friction effect. Through the above-mentioned manner creates the sand particles suspended and high speed in the flow of water and let sand particles high speed movement, impact, friction conditions, through the friction can effectively remove the mud, mud block in the sand into the water, can be the edge, needle-like structure of the manufactured sand, sand particles surface weathering layer impact, peeling, grinding into water, sand particles get round, can be the surface of sea sand and the chloride ion in the gap, the organic matter adsorbed on the sand particles peeling into water.

[0061] Sand and water mixture flow out from the discharge port 4 after the completion of the process, into the subsequent sand water separator, dehydration screen, etc., through the sand water separator separates sand, water, harmful substances peeled from the surface of sand body with sand water separator discharge, the sand discharged from the sand water separator can be further dehydrated by dehydration screen, and finally become finished sand to the finished product yard.

[0062] In summary, the present application can simply, quickly, efficiently and stably remove harmful substances of construction sand: when used for washing river sand, it can effectively remove harmful substances such as mud and mud block in river sand; when used for washing manufactured sand, it can effectively remove harmful substances such as edge, needle-like structure and surface weathering layer of manufactured sand, and get round; when used for washing sea sand, it can quickly and effectively remove harmful substances such as chloride ion and organic matter adsorbed on the surface of sea sand, and the content of chloride ion after treatment can reach 0.000% to 0.002%, the sea sand can be reduced to river sand state, and can be used safely like river sand, and the purified sea sand after treatment is superior to the corresponding industry and national construction sand standard.

[0063] The concrete made of the sand treated by the present application will not cause steel corrosion and concrete deterioration, has good durability, and can be safely and widely used in construction and municipal engineering. At the same time, the present application has the characteristics of simple structure, stable and reliable operation and low cost, can meet the cleaning of different types of sand, and has wide market prospect.

[0064] The present application does not limit the specific implementation mode of the support structure, the function of the support structure is only to realize the installation and fixing function of the cleaning tank device, so any different structure of the support structure belongs to the protection scope of the present application. The following will be further illustrated by listing several examples.

[0065] Example one:

[0066] For example, Figures 1-4As shown, the support structure 2 in this example includes a support column 5 and several horizontal branches 6. The support column 5 is vertically arranged inside or outside the spiral structure formed by the cleaning tank 1. One end of the horizontal branch 6 is set on the support column 5, and the other end is suspended in the air, forming a tree-like structure. The cleaning tank 1 is installed on the horizontal branch 6.

[0067] The number of supporting columns 5 can be one or more; several horizontal branches 6 are distributed on the supporting columns 5 in a spiral structure from top to bottom, and the cleaning tank 1 can be installed on the spirally distributed horizontal branches 6 by means of clamps or other structures.

[0068] The support structure 2 may also include a reinforcing diagonal brace 7, one end of which is fixedly connected to the support column 5 and the other end is fixedly connected to the horizontal branch 6, thereby strengthening and fixing the horizontal branch 6.

[0069] The supporting column 5 can be a hollow column with a cylindrical structure. The hollow part inside can be filled with concrete, which can strengthen the supporting column 5 and improve its corrosion resistance.

[0070] The lower end of the supporting column 5 can be equipped with a column base flange 8 for connection to the precast foundation, and the upper end can be equipped with a top flange 9 for connection to the hoisting mechanism. The hoisting mechanism can be used to assist in hoisting, facilitating the initial installation and subsequent maintenance of the cleaning tank 1.

[0071] Example 2:

[0072] like Figure 5 As shown, the support structure 2 in this example includes multiple support units 11. Each support unit 11 includes an inner column 12 and an outer column 13. The bottom ends of the inner column 12 and the outer column 13 are connected to the precast foundation. The inner column 12 and the outer column 13 are located on the inner and outer sides of the spiral structure formed by the cleaning tank 1, respectively. The inner column 12 and the outer column 13 are connected together by several cross braces 14. The cleaning tank 1 is installed on the cross braces 14.

[0073] As an improvement to an embodiment of the present invention, such as Figure 5 As shown, a maintenance walkway 36 and / or guardrail 37 are provided on the inner or outer side of the spiral-shaped cleaning tank 1. The maintenance walkway 36 and / or guardrail 37 are each arranged in a spiral structure. The maintenance walkway 36 is located inside (or outside) the spiral structure of the cleaning tank 1, and the guardrail 37 is located inside (or outside) the spiral structure of the maintenance walkway 36. The maintenance walkway 36 and guardrail 37 are installed on the support structure 2, and their installation method is the same as that of the cleaning tank 1. A maintenance ladder 38 is provided at the bottom of the maintenance walkway 36. The upper end of the maintenance ladder 38 is connected to the maintenance walkway 36, and the lower part is located on the ground. Access to the maintenance walkway 36 is via the lower ladder 38.

[0074] The cleaning tank of the spiral structure can include an inner spiral 46 and an outer spiral 47, and the maintenance walkway 36 is located between the inner spiral 46 and the outer spiral 47, as shown. Figure 6 The inner and outer spiral structures can make full use of the space.

[0075] The feeding port 3 of the present application can be provided with a feeding hopper 39, and the bottom of the feeding hopper 39 is communicated with the feeding port 3 through a discharging port 40.

[0076] The feeding hopper 39 can add the mixed sand-water mixture, and then the sand-water mixture enters the feeding port 3 through the discharging port 40; the feeding hopper 39 can also add sand and water respectively, and the sand and water are fully mixed in the feeding hopper 39 to form a sand-water mixture, and then the sand-water mixture enters the feeding port 3 through the discharging port 40, so as to enter the cleaning tank 1.

[0077] As shown in Figures 7-9 The cleaning tank 1 can include an outer shell layer 41 and a wear-resistant layer 42 located in the outer shell layer 41, and the outer shell layer 41 and the wear-resistant layer 42 each include a bottom plate and side wall plates on the left and right sides, and the bottom plate and the side wall plates of the outer shell layer 41 and the wear-resistant layer 42 each form a groove structure with the upper side open, and the groove structure of the wear-resistant layer 42 is located in the groove structure of the outer shell layer 41.

[0078] The outer shell layer 41 and the wear-resistant layer 42 can be formed by bending or injection molding, and the material of the outer shell layer 41 can be stainless steel, ordinary steel, glass steel, plastic, or other materials with strength and plasticity; the material of the wear-resistant layer 42 can be stone plate, vitrified brick, manganese steel, tungsten steel, wear-resistant aluminum oxide patch, polyurethane or wear-resistant rubber, etc.

[0079] In some examples, the cleaning tank 1 can be a whole structure, and the whole cleaning tank 1 is hoisted and installed on the support structure 2 after being manufactured as a whole.

[0080] In other examples, the cleaning tank 1 is composed of multiple tank bodies segmented and assembled, as shown in Figures 7-9 The outer shell layer 41 of each tank body is provided with a segmented flange 43 on the outside of the front and rear ends of the bottom plate and the side wall plates, and the adjacent two tank bodies are fixed by bolt pins, and the segmented flange 43 is provided with a reinforcing rib plate 44 between the bottom plate and the side wall plates of the outer shell layer 41.

[0081] As another improvement of this invention, the cleaning tank 1 may be equipped with obstructions 45 to increase the impact frequency of sand within the cleaning tank 1 and to change the direction and force of sand movement, thereby improving the impact and friction effects of the sand. Multiple obstructions 45 may be provided, spaced apart in the direction of sand and water movement within the cleaning tank 1. Under the obstruction of the obstructions 45, the sand undergoes high-speed oblique throwing and impact, which is more conducive to the shedding of harmful substances such as mud, chloride ions, and organic matter from the sand surface, and reduces the presence of sharp edges, flaky textures, and weathered layers on the sand surface.

[0082] Obstruction 45 can be an uneven object located at the bottom and / or sides of the cleaning tank 1, such as... Figure 9 As shown; or the obstruction may be a steel grid installed in the cleaning tank, or other obstructions of various shapes. All obstructions of various materials and shapes that can obstruct, impact, or rub against the sand and water flowing in the cleaning tank are within the scope of protection of this utility model.

[0083] Preferably, the obstruction 45 can be provided in the non-bending part of the cleaning tank 1. Of course, it can also be provided in the bending part. The present invention does not limit this.

[0084] Example 2:

[0085] This invention provides a construction sand purification system, such as... Figures 10-13 As shown, it includes a first sand-water separator 200 and a construction sand purification device 100 as described in Example 1. The discharge port 4 of the construction sand purification device 100 is connected to the first sand-water separator 200.

[0086] In use, the sand and water mixture is flushed in the washing tank 1 by the construction sand purification device 100. The sand particles move at high speed in the water, causing strong collisions and friction with the sand body, removing harmful substances from river sand, manufactured sand, and sea sand into the water. Then, the sand-water mixture is discharged from the discharge port 4 and separated by the first sand-water separator 200. Harmful substances peeled off from the surface of the sand body are discharged with the water. The sand separated from the sand-water separator can be transported to the finished product storage yard as finished sand.

[0087] Optionally, the first sand-water separator 200 can be a centrifugal sand-water separator, a spiral sand washing machine, or a bucket elevator sand washing machine, or other equipment and facilities capable of sand-water separation.

[0088] The construction sand purification system of the present invention may also include other supporting equipment, and the installation methods of these supporting equipment may include, but are not limited to, the following.

[0089] Method 1:

[0090] like Figure 10 , 12As shown, the construction sand purification device 100 is further provided with a raw sand feeding machine 300, a waste material screening machine 400 and a sand-water mixing and conveying device 700 arranged in sequence.

[0091] During production, the raw sand is conveyed by a loader or a self-unloading hopper, and is lifted by the raw sand feeding machine 300 to the waste material screening machine 400 at a high position, and the large-particle solid waste materials are screened out by the waste material screening machine 400. The waste material screening machine 400 can be provided with a pre-cleaning device, and after the raw sand removes the large-particle solid waste materials, the raw sand enters the sand-water mixing and conveying device 700, which comprises a sand-water pool 701, a sand-water agitator 702, a suction pipeline 703 and a suction pump 704. The first end of the suction pipeline 703 is inserted into the sand-water pool 701, and the second end is connected with the feeding port 3 or the feeding hopper 39 of the sand cleaning device 100. The suction pump 704 is arranged on the suction pipeline 703.

[0092] The sand-water pool 701 is used as a mixing container for the added sand and water, and the sand-water agitator 702 is used to agitate the sand-water pool 701 to form a suspended sand-water mixture flow. The sand-water mixture flow is sucked by the suction pump 704 under the positive pressure or / and negative pressure, and is sent to the cleaning tank 1 of the cleaning device 100 through the suction pipeline 703 for cleaning and purification.

[0093] The sand-water agitator 702 comprises an agitating motor 705, which is arranged outside the sand-water pool 701. An agitating rod 706 is arranged on the output shaft of the agitating motor 705, and a plurality of agitating blades 707 are arranged on the agitating rod 706, which are arranged inside the sand-water pool 701.

[0094] A cover plate 708 can be arranged above the sand-water pool 701. The agitating motor 705 is arranged above the cover plate 708 in a downward output shaft manner. The agitating rod 706 passes through a first passing hole of the cover plate 708 downward into the sand-water pool 701. The agitating blades 707 on the lower end of the agitating rod 706 are driven by the agitating motor 705 to agitate the sand and water in the sand-water pool 701 to rotate at a high speed, so as to form a suspended sand-water mixture flow.

[0095] The suction pump 704 can be arranged above the cover plate 708, and the first end of the suction pipeline 703 is inserted into the sand-water pool 701 through a second passing hole of the cover plate 708.

[0096] An inlet sand device 711 is arranged above the cover plate 708. The bottom of the inlet sand device 711 passes through the cover plate 708 into the sand-water pool 701. The upper part of the inlet sand device 711 is connected with the outlet of the previous device.

[0097] In this way, the pre-cleaning device can be further arranged after the waste material screening machine 400 to wash and remove the harmful substances such as the surface mud layer of the raw sand.

[0098] For example, the pre-cleaning device can be a sand washer 500 and a second sand-water separator 600, as shown in Figure 11 The sand after removal of large-particle solid waste is fed into the sand washer 500 for removal of the mud layer on the surface of the raw sand. The sand washer 500 can be a washing device such as a flushing tank, a flushing pipeline, a wheel-bucket sand washer, a spiral sand washer, a bucket-lifting sand washer, or other existing sand washing equipment.

[0099] When the sand washer 500 is a flushing tank, the flushing tank is arranged in an inclined manner with the inlet higher than the outlet. The sand screened by the waste screening machine is fed into the flushing tank, and high-pressure water is pumped into the flushing tank. Under the combined action of water power and gravity of the sand, the mixture of the sand and water flows at a high speed from the high place to the low place in the flushing tank, and the sand in the flushing tank is washed and flushed by the high-speed water flow to remove the harmful substances such as the mud layer on the surface of the raw sand.

[0100] The sand after washing by the sand washer 500 is subjected to sand-water separation by the second sand-water separator 600, which can be a centrifugal sand-water separator. The separated sand is fed into the sand-water mixing and conveying device 700.

[0101] In this mode, the number of the construction sand purification device 100 is one or more, which can be used alone or in combination according to the difficulty of washing the sea sand in different sea areas and the land conditions of the sand washing plant. When the number of the construction sand purification device 100 is multiple, the multiple construction sand purification devices 100 are arranged in sequence, and the multiple construction sand purification devices 100 are used repeatedly in combination. The number of repetitions is not limited to two, three, four, five, or six.

[0102] At this time, one sand-water mixing and conveying device 700 is arranged in front of the first construction sand purification device 100 and between the adjacent two construction sand purification devices 100, and the discharge port 4 of the last construction sand purification device 100 is connected to the first sand-water separator 200.

[0103] Optionally, all or part of the first sand-water separator 200 and the second sand-water separator 600 is provided with a dehydration device 800, which can be a dehydration screen or other dehydration equipment.

[0104] Mode two:

[0105] As shown in Figure 13 The construction sand purification device 100 is further provided with a raw sand feeding machine 300, a waste screening machine 400, a sand washer 500, a second sand-water separator 600, and a lifting feeding device 900 arranged in sequence. The lifting feeding device 900 is connected to the feeding port 3 of the construction sand purification device 100, and a water inlet pipe is arranged at the feeding port 3 of the construction sand purification device 100.

[0106] The sand treated by the second sand-water separator 600 is added into the feeding hopper 39 by the lifting feeding device 900, and water is added into the feeding hopper 39 by a water inlet pipe, etc., the sand and water in the feeding hopper 39 are fully mixed to form a sand-water mixture, and the sand-water mixture enters the cleaning tank 1 from the feeding port 3.

[0107] Similar to the first mode, in the present mode, the number of construction sand purification devices 100 can also be one or more, when the number of construction sand purification devices 100 is more, the construction sand purification devices 100 are arranged in sequence, and a lifting feeding device 900 is arranged in front of the first construction sand purification device 100 and between adjacent two construction sand purification devices 100.

[0108] In the present mode, the discharge port of the last construction sand purification device 100 is connected with a first sand-water separator 200, or the discharge port of each construction sand purification device 100 is connected with a first sand-water separator 200.

[0109] Optionally, all or part of the first sand-water separator 200 and the second sand-water separator 600 are provided with a dehydration device 800.

[0110] When the number of construction sand purification devices 100 is more, the discharge port 4 of each or the last construction sand purification device 100 is connected with a sand-water collection pool 10, as shown in Figure 14 、 15 The sand-water collection pool 10 can be provided with a sand-water splash-proof device (cover plate, etc.).

[0111] The construction sand purification system of the present embodiment includes all the technical solutions of the construction sand purification device described in embodiment 1, which has the beneficial effects described in embodiment 1, and will not be repeated here. For other matters not mentioned in the present embodiment, please refer to the corresponding contents in the foregoing embodiment 1.

[0112] The above is the preferred embodiment of the present application, it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A construction sand purification system, characterized by, The construction sand purification device is connected with the first sand-water separator, and comprises a cleaning tank and a supporting structure, wherein: The cleaning tank is provided in a spiral structure inclined and spiraled from top to bottom, the upper side of the cleaning tank is in an open structure, the top end of the cleaning tank is a feeding port, and the bottom end is a discharging port, and the cleaning tank forms a flow channel in a spiral structure inclined and spiraled from top to bottom between the feeding port and the discharging port; The cleaning tank is provided with a plurality of interference objects for increasing the impact frequency of sand in the cleaning tank and changing the direction and force of sand movement, and the interference objects are arranged in the direction of sand and water movement in the cleaning tank. The interference objects are concave-convex objects arranged at the bottom and / or both sides of the cleaning tank, or the interference objects are steel reinforcement grids arranged in the cleaning tank. The construction sand purification device further comprises a raw sand feeding machine, a waste material screening machine and a sand-water mixing and conveying device arranged in sequence from front to back. The sand-water mixing and conveying device comprises a sand-water pool, a sand-water mixer, a suction pipeline and a suction pump, the first end of the suction pipeline is inserted into the sand-water pool, the second end is connected with the feeding port of the construction sand purification device, and the suction pump is arranged on the suction pipeline. The number of the construction sand purification devices is one or more, when the number of the construction sand purification devices is multiple, the multiple construction sand purification devices are arranged in sequence from front to back, and one sand-water mixing and conveying device is arranged in front of the first construction sand purification device and between adjacent two construction sand purification devices. The discharging port of the last construction sand purification device is connected with the first sand-water separator, or the discharging port of each construction sand purification device is connected with one first sand-water separator. Alternatively, the construction sand purification device further comprises a raw sand feeding machine, a waste material screening machine, a sand washing machine, a second sand-water separator and a lifting feeding device arranged in sequence from front to back. The lifting feeding device is connected with the feeding port of the construction sand purification device, and a water inlet pipe is further arranged at the feeding port of the construction sand purification device. The number of the construction sand purification devices is one or more, when the number of the construction sand purification devices is multiple, the multiple construction sand purification devices are arranged in sequence from front to back, and one lifting feeding device is arranged in front of the first construction sand purification device and between adjacent two construction sand purification devices. The discharging port of the last construction sand purification device is connected with the first sand-water separator, or the discharging port of each construction sand purification device is connected with one first sand-water separator.

2. The construction sand purification system of claim 1, wherein The cleaning tank forming the spiral structure is entirely curved, or the cleaning tank forming the spiral structure is partially curved and partially linear.

3. The construction sand purification system of claim 1, wherein The support structure comprises support columns and a plurality of transverse branches, the support columns are vertically arranged inside or outside the spiral structure formed by the washing tanks, one end of the transverse branches is arranged on the support columns, and the other end is suspended, and the washing tanks are installed on the transverse branches.

4. The construction sand purification system of claim 3, wherein The number of the support columns is one or more, the plurality of transverse branches are distributed on the support columns in a spiral structure from top to bottom, and the washing tanks are installed on the transverse branches by clamping.

5. The construction sand purification system of claim 4, wherein, The support structure further comprises reinforcing diagonal braces, one end of the reinforcing diagonal braces is fixedly connected with the support columns, and the other end is fixedly connected with the transverse branches.

6. The construction sand purification system of claim 1, wherein The support structure comprises a plurality of support units, each support unit comprises an inside column and an outside column, the inside column and the outside column are respectively arranged inside and outside the spiral structure formed by the washing tanks, the inside column and the outside column are connected together by a plurality of cross braces, and the washing tanks are installed on the cross braces.

7. The construction sand purification system of any one of claims 1-6, wherein, The inside or outside of the spiral structure of the washing tank is provided with an inspection walkway and / or a guardrail, the inspection walkway and / or the guardrail are installed on the support structure, and the bottom end of the inspection walkway is provided with an inspection ladder.

8. The construction sand purification system according to claim 7, wherein the spiral structure of the washing tank comprises an inside spiral and an outside spiral, and the inspection walkway is located between the inside spiral and the outside spiral.

9. The construction sand purification system of any one of claims 1-6, wherein, A feeding hopper is arranged on the feeding port, and the bottom of the feeding hopper is communicated with the feeding port through a discharging port.

10. The construction sand purification system of any one of claims 1-6, wherein, The washing tank comprises an outer shell layer and a wear-resistant layer arranged in the outer shell layer, the outer shell layer and the wear-resistant layer each comprise a bottom plate and side wall plates on left and right sides, the bottom plate and the side wall plates of the outer shell layer and the wear-resistant layer each form a groove structure with an open upper side, and the groove structure of the wear-resistant layer is located in the groove structure of the outer shell layer.

11. The construction sand purification system of claim 9, wherein, The washing tank is of an integral structure. Alternatively, the washing tank is composed of a plurality of groove bodies which are segmented and assembled, the outer sides of the front and rear ends of the bottom plate and the side wall plates of the outer shell layer of each groove body are provided with assembly flanges, the adjacent two groove bodies are fixed by bolt pins, and reinforcing rib plates are arranged between the assembly flanges and the bottom plate and the side wall plates of the outer shell layer.

12. The construction sand purification system of claim 1, wherein, When the number of the construction sand purification devices is multiple, the discharging port of each or the last construction sand purification device is connected with a sand-water collection pool.

13. The construction sand purification system of claim 12, wherein, The sand-water collection pool is provided with a sand-water splash-proof device.

14. The construction sand purification system of claim 13, wherein, All or part of the first sand-water separator is provided with a dehydration device.

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