Air splitter

Abstract

An air splitter according to the present invention is an air splitter for separating sand and a certain amount of fine powder from a mixture of sand and fine powder, comprising: a splitter body portion constituting the air splitter and having a space portion; a conveyor that conveys and drops a mixture of sand and fine powder mixed to the inner upper portion of the body portion; a classification guide plate that causes the sand-fine powder mixture conveyed by the conveyor to fall and collide with a classification net; and a classification net installed at the lower portion of the classification guide plate and guiding the dropped mixture to scatter downward. The apparatus comprises: a classifier mesh vibration means for vibrating the classifier mesh to promote the falling mixture to scatter evenly downward; a boost blower for blowing air so that the scattered sand and fine powder falling through the classifier mesh are separated by the air flow; an air nozzle connected to the boost blower and spreading the air flow generated by the boost blower to the lower part of the splitter body; a first duct for inducing the separated fine powder to be discharged to the outside along the flow of air sprayed from the air nozzle; and a transfer duct connected to the first duct and providing a flow path for the fine powder discharged through the first intake duct to move to a dust collector.

Description

Technology Field

[0001] The present invention relates to an air splitter for separating a high-quality sand-fine mixture classified to have a desired ratio of sand and fine powder by separating and removing a portion of the fine powder from a mixture of sand and fine powder. Background Technology

[0003] In the course of recent urbanization and industrialization, many diverse structures such as bridges, roads, and various buildings have emerged; as these structures gradually deteriorate over time, reconstruction and redevelopment are being actively pursued at appropriate times.

[0004] During the process of demolishing, rebuilding, or redeveloping these aging structures, large quantities of waste concrete and waste soil, which are types of construction waste, are generated. If this construction waste is buried as is, not only is it difficult to secure landfill sites, but landfill costs are also high, and it has a serious adverse effect on the environment.

[0005] Accordingly, various measures have been devised in each country to treat construction waste from two perspectives: resolving the shortage of natural aggregates and natural sand to protect the natural environment and recycling resources. In Korea, too, various treatment facilities have been developed and are in use to recycle construction waste into resources.

[0006] Generally, construction waste treatment facilities transport waste concrete, from which waste materials such as garbage, wood, and metal have been removed, by crushing or grinding it using crushing devices (jaw crushers, sand mills, etc.); during the transport process, the waste is separated and sorted by material, size, or specific gravity using various sorting devices.

[0007] During the crushing process of waste concrete, a large amount of fine powder is generated along with the aggregate. Since separating the aggregate from the fine powder is necessary to improve the quality of recycled aggregate, various types of fine powder classification devices are used to classify the aggregate raw materials and the fine powder.

[0008] As mentioned above, mixtures of sand and fine powder classified once by a fine powder classifier often contain a large amount of usable sand, but are frequently discarded instead of being used as recycled aggregate when the amount of mixed fine powder is excessive. The disposal costs for such discarded sand and fine powder mixtures are substantial, which sometimes leads to illegal dumping and does not have a positive impact on the environment.

[0009] Therefore, there is a need for a process and device that minimizes waste by increasing the amount of recycled aggregate that can be used at various construction sites by separating and removing a certain amount of fine powder from a mixture of primarily classified sand and fine powder, and by controlling the ratio of sand to fine powder to suit various construction sites. Prior art literature

[0011] Republic of Korea Registered Patent No. 10-1942894 Republic of Korea Registered Patent No. 10-1616633 Republic of Korea Registered Patent No. 10-1676664 The problem to be solved

[0012] The purpose of the air splitter according to the present invention is to provide an air splitter that increases the efficiency of aggregate regeneration and minimizes airborne dust and fine particles causing environmental pollution by supplying a mixture of sand and fine particles to a device through a conveyor and removing a significant amount of dust or fine particles scattered upon falling, thereby regenerating a mixture of sand and fine particles in a ratio suitable for the use of recycled aggregate.

[0013] In addition, dry classification is performed while minimizing the scattering of dust or fine particles to the outside, making it possible to regenerate sand or a sand-fine particle mixture of the desired quality. means of solving the problem

[0015] An air splitter according to the present invention is an air splitter for separating sand and a certain amount of fine powder from a mixture of sand and fine powder, comprising: a splitter body portion constituting the air splitter and having a space portion; a conveyor that conveys and drops a mixture of sand and fine powder mixed to the inner upper portion of the body portion; a classification guide plate that causes the sand-fine powder mixture conveyed by the conveyor to fall and collide with a classification net; and a classification net installed at the lower portion of the classification guide plate and guiding the dropped mixture to scatter downward.

[0016] The apparatus comprises: a classifier mesh vibration means for vibrating the classifier mesh to promote the falling mixture to scatter evenly downward; a boost blower for blowing air to separate the scattered sand and fine powder falling through the classifier mesh by the air flow; an air nozzle connected to the boost blower and spreading the air flow generated by the boost blower to the lower part of the splitter body; a first intake duct for inducing the separated fine powder to be discharged to the outside along the flow of air sprayed from the air nozzle; and a transfer duct connected to the first intake duct and providing a flow path for the fine powder discharged through the first intake duct to move to a dust collector.

[0018] In this case, it may be characterized by further including a second intake duct branched to the transfer duct to connect the inner upper part of the splitter body and the transfer duct in order to guide fine particles scattered from the inner upper part of the splitter body to the dust collector.

[0020] In addition, a first intake control damper is installed at the upper part of the first intake duct to control the amount of fine dust collected by adjusting the suction force of air flowing into the first intake duct, and a second intake control damper is installed at the second intake duct to control the amount of airborne dust collected by adjusting the suction force of air flowing into the second intake duct, and a third intake control damper is installed at the transfer duct to control the suction force of the entire air sucked in through the first intake duct and the second intake duct.

[0022] In addition, it may be characterized by further including an angle-adjustable blade that allows fine particles separated by air sprayed through the air nozzle to be smoothly guided into the first intake duct formed at an upward angle, and prevents sand from being transported to the first intake duct.

[0024] In addition, the air nozzle of the air splitter according to the present invention is formed such that its width increases and its height decreases in the end direction, and may be further characterized by having an angle adjustment means for adjusting the angle of the air nozzle to control the amount of fine particles separated into the first intake duct.

[0025] The air splitter according to the present invention may be characterized in that the classifying net is installed on a fixed frame, and the fixed frame is seated on a plurality of hanging devices including springs and turnbuckles to prevent vibrations generated by magnetic hammers (vibration means) installed on both sides of the fixed frame from being transmitted to the splitter body, and the flow of sand can be smoothly controlled by adjusting the installation angle of the classifying net according to the length adjustment of the hanging devices.

[0027] In addition, the present invention may be characterized by further comprising a blade cleaner coupled to one end of the blade to provide vibration so as not to adhere to the blade. Effects of the invention

[0029] According to the present invention, by capturing and removing a certain amount of fine powder from a sand-fine powder mixture containing a large amount of fine powder, it is possible to produce recycled aggregate in which sand and fine powder are appropriately mixed.

[0030] In addition, by removing a certain amount of fine particles, the amount of recycled aggregate can be increased, and the amount of waste discarded can be minimized.

[0031] In addition, by controlling the suction force of the air flowing through each intake duct and transfer duct, it is possible to efficiently produce recycled aggregate of the desired quality. Brief explanation of the drawing

[0033] FIG. 1 is a drawing showing a partial cross-section illustrating the structure of an air splitter according to the present invention in detail. FIG. 2 is a drawing showing the interior of an air splitter according to the present invention from the side. FIG. 3 is a perspective view of an air splitter according to the present invention viewed from one direction. FIG. 4 is a perspective view of an air splitter according to the present invention viewed from a different direction. FIG. 5 is an explanatory diagram showing the flow of air and fine particles inside an air splitter according to the present invention. FIG. 6 is a cross-sectional view of an air splitter according to the present invention. FIG. 7 is a diagram showing the structure of a nozzle constituting an air splitter according to the present invention. Specific details for implementing the invention

[0034] Further objects, features, and advantages of the present invention can be more clearly understood from the following detailed description and the accompanying drawings.

[0036] Before providing a detailed description of the present invention, it should be understood that the present invention is capable of various modifications and may have various embodiments, and that the examples described below and illustrated in the drawings are not intended to limit the present invention to specific embodiments, but rather include all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention.

[0037] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0039] The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0041] Furthermore, in the description referring to the attached drawings, identical components are assigned the same reference numeral regardless of drawing symbols, and redundant descriptions thereof are omitted. In describing the present invention, if it is determined that a detailed description of related prior art could unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0042] Hereinafter, an air splitter according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0043] First, the explanation will be given with reference to FIGS. 1 and FIGS. 5. FIGS. 1 is a drawing showing a partial cross-section of the structure of an air splitter according to the present invention in detail, and FIGS. 5 is a cross-sectional view showing the flow of air and the movement of sand and fine powder by the air splitter according to the present invention in an easy-to-understand manner.

[0044] The air splitter according to the present invention is a device for separating sand and a certain amount of fine powder from a mixture of sand and fine powder.

[0045] A splitter body (10) comprising an air splitter and having a space; a conveyor (20) for conveying and dropping a mixture of sand and fine powder mixed into the inner upper portion of the body (10); a classification guide plate (30) for causing the sand-fine powder mixture conveyed by the conveyor (20) to fall and collide with a classification net (40); a classification net (40) installed at the lower portion of the classification guide plate (30) and guiding the dropped mixture to scatter downward; a classification net vibration means (50) for giving vibration to the classification net (40) to promote the dropped mixture to scatter evenly downward; and a boost blower (60) for blowing air so that the scattered sand and fine powder falling through the classification net are separated by air flow. It comprises: an air nozzle (70) connected to the boost blower (60) and spreading the air flow generated by the boost blower (60) to the lower part of the splitter body (10); a first duct that guides the separated fine particles to be discharged to the outside along the flow of air sprayed from the air nozzle (70); and a transfer duct (90) connected to the first duct and providing a path for the fine particles discharged through the first intake duct (80) to move to a dust collector.

[0047] The air splitter according to the present invention includes a splitter body (10) having an open top and a space for sand and fine powder to fall downward. The top of the body (10) is open to one side, and a conveyor (20) is installed in the open part so that a mixture of sand and fine powder is supplied from the inner upper part of the body (10).

[0048] The supplied mixture of sand and fine powder is designed to fall by gravity and land on the classification guide plate (30). The classification guide plate (30) guides the mixture to settle on the classification net (40). Some of the flying dust from the falling mixture is guided to the transfer duct (90) through the second intake duct (100) formed connected to the upper part of the body part (10). The mixture contains sand and fine powder of various sizes, and when the finest particles are scattered and remain on the upper inner side of the body part (10), they are sucked in and removed by the air moving to the transfer duct (90) through the second intake duct (100).

[0050] When the mixture from which airborne dust has been primarily removed falls, it falls onto the classification guide plate (30). The classification guide plate (30) is made of a durable metal material. The classification net (40) installed at the bottom of the classification guide plate (30) is also mainly made of metal. By causing the falling mixture to fall onto the classification guide plate (30) rather than directly onto the classification net, wear caused by collision between the mixture and the classification net can be minimized.

[0052] A classifier net (40) is attached to the upper part of a fixed frame (41), and the fixed frame is connected to the body part (10) by a plurality of hanging devices. A classifier net vibration means (50) is installed on the fixed frame to induce the mixture dropped on the classifier net (40) to scatter and fall more evenly. Various vibration means may be used, but it is preferable to select a magnetic hammer (50) as the vibration means. When vibration is applied to the classifier net (40) by the magnetic hammer, the dropped mixture can be dispersed downward more evenly, and the sand and fine powder can be separated more efficiently by the air flow provided by the boost blower (60).

[0054] A first intake control damper (81) is installed at the upper part of the first intake duct (80) to control the amount of fine dust collected through the first intake duct (80) by controlling the suction force of the air flowing into the first intake duct (80), and a second intake control damper (101) is installed in the second intake duct (100) to control the amount of airborne dust collected through the second intake duct (100) by controlling the suction force of the air flowing into the second intake duct (100), and a third intake control damper is installed in the transfer duct (90) to control the suction force of the entire air sucked in through the first intake duct (80) and the second intake duct (100).

[0056] If the mixture contains a large amount of very fine particles and generates a large amount of airborne dust, the second intake control damper installed in the second intake duct (100) is opened to increase the flow of air moving through the second intake duct (100). In other words, the suction force is increased. By doing so, the discharge of airborne dust containing fine particles to the outside of the body part (10) can be minimized. When a mixture that generates less airborne dust is supplied, the degree of opening of the second intake control damper is lowered so that an appropriate suction force is provided.

[0058] The first intake control damper controls the flow rate of air moving through the first intake duct (80). That is, it serves to control the suction force. The amount of sand and fine powder in the final product produced by falling through the discharge section can be controlled by the control of the first intake control damper. If the first intake control damper is opened wide, the amount of fine powder discharged through the first intake duct (80) increases, and the proportion of sand with relatively large particles in the produced product increases.

[0059] Conversely, if the first intake control damper is opened less, the amount of fine powder discharged through the first intake duct (80) decreases, and the proportion of fine powder in the final product produced increases.

[0060] Since the optimal ratio of sand to fine powder varies depending on where the final product is used, it becomes possible to control the ratio of sand to fine powder to the desired level according to the intended use of the final product or customer needs.

[0062] The third intake control damper (91) controls the flow rate of air moving through the transfer duct (90). That is, it serves to control the suction force applied to the transfer duct (90). If the third intake control damper is opened wide, the amount of airborne dust and fine particles sucked in through the first intake duct (80) and the second intake duct (100) increases. Additionally, if the amount of mixture supplied per hour through the transfer conveyor increases, the third intake control damper can be opened wide and used as a means to increase productivity.

[0063] By appropriately controlling the first intake control damper, the second intake control damper, and the third intake control damper, the ratio of sand and fine powder contained in the final product can be appropriately controlled in response to changes in the suction power of the dust collector, the supply flow rate of the boost blower (60), the amount of mixture supplied to the conveyor (20), and the mixing ratio of sand and fine powder.

[0065] In addition, it may be characterized by further including an angle-adjustable blade that allows fine particles separated by air sprayed through the air nozzle (70) to be smoothly guided into the first intake duct (80), which is formed at an upward angle, and prevents sand from being transported to the first intake duct (80). The blade plays a role in guiding fine particles smoothly into the first intake duct (80) by adjusting the blade angle, and plays a role in creating a flexible flow into the first intake duct (80) which is inclined upward. In addition, it plays a role in controlling the flow rate so that sand blown by the boost blower (60) is not lost through the transport duct (90), and also plays a role in increasing the durability of the first intake duct (80).

[0067] Additionally, the air splitter according to the present invention may be characterized in that the air nozzle (70) is formed such that its width increases and its height decreases in the end direction, and further comprises an angle adjustment means for adjusting the angle of the air nozzle (70) to control the amount of fine powder separated into the first intake duct (80). The angle adjustment means can adjust the angle of the air nozzle (70) through an adjustment lever connected to the air nozzle (70).

[0069] The air splitter according to the present invention may be characterized in that the classifying net (40) is installed on a fixed frame (41), and the fixed frame is seated on a plurality of hanging devices (120) including a spring (121) and a turnbuckle (122) to prevent vibrations generated by magnetic hammers (50, the vibration means) installed on both sides of the fixed frame from being transmitted to the splitter body, and the installation angle of the classifying net (40) is adjusted according to the length adjustment of the hanging devices to smoothly control the flow of sand.

[0070] It is most preferable to install a total of four hanging devices, one at each corner of the classifier frame (41). Additionally, the angle of the classifier (40) can be adjusted by adjusting the length of the hanging device, and in this way, the angle of the classifier (40) at which the mixture falls most evenly can be found.

[0072] In addition, the present invention may be characterized by further comprising a blade cleaner (111) coupled to one end of the blade (110) and providing vibration to prevent fine particles from adhering to the blade.

[0073] When fine particles are supplied to the first intake duct (80) while continuously colliding with the blade, the fine particles may adhere to the blade surface. To prevent this, a magnetic hammer that provides vibration to the blade can be attached to prevent the fine particles from adhering to the blade surface. Although it is possible to remove the adhered fine particles by directly scraping the blade surface, the structure becomes complex and may obstruct the flow passing through the blade; therefore, removing the fine particles attached to the blade by vibration can be selected as the most desirable embodiment. Explanation of the symbols

[0075] 10 : Body part 20 : Transfer conveyor 30 : Classification induction plate 40 : Classification net 50 : Classification net vibrating means 60 : Boost Blower 70 : Air nozzle 80 : First intake duct 90 : Transfer duct 100 : Second intake duct 110 : Blade 120 : Hanging device 140 : Discharge part 150 : Inspection window

Claims

Claim 1 An air splitter for separating sand and a certain amount of fine powder from a mixture of sand and fine powder, comprising: a splitter body portion constituting the air splitter and having a space portion; a conveyor that conveys and drops a mixture of sand and fine powder to the inner upper portion of the body portion; a classification guide plate that causes the sand-fine powder mixture conveyed by the conveyor to fall and collide with a classification net; a classification net installed below the classification guide plate and guiding the dropped mixture to scatter downward; a classification net vibration means that vibrates the classification net to promote the dropped mixture to scatter evenly downward; a boost blower that blows air so that the scattered sand and fine powder falling through the classification net are separated by air flow; an air nozzle connected to the boost blower and diffusing the air flow generated by the boost blower to the lower portion of the splitter body portion; and a means that guides the separated fine powder to be discharged to the outside along the flow of air sprayed from the air nozzle. An air splitter comprising: a first duct; and a transfer duct connected to the first duct and providing a path for fine particles discharged through the first intake duct to travel to a dust collector. Claim 2 An air splitter according to claim 1, further comprising a second intake duct branched and coupled to a transfer duct to connect the inner upper portion of the splitter body and the transfer duct in order to guide fine particles scattered from the inner upper portion of the splitter body to a dust collector. Claim 3 An air splitter according to claim 2, wherein a first intake control damper is installed at the upper part of the first intake duct to control the amount of fine dust collected by controlling the suction force of air flowing into the first intake duct and the amount of airborne dust collected by controlling the suction force of air flowing into the second intake duct and the amount of airborne dust collected by controlling the suction force of air flowing into the second intake duct and the amount of airborne dust collected by controlling the suction force of the first intake duct and the second intake duct, and a third intake control damper is installed at the transfer duct to control the suction force of the total air sucked in through the first intake duct and the second intake duct. Claim 4 An air splitter according to claim 2 or 3, further comprising an angle-adjustable blade that smoothly guides fine powder separated by air sprayed through the air nozzle into the first intake duct formed at an upward inclination, and prevents sand from being transported to the first intake duct. Claim 5 An air splitter according to claim 2 or 3, wherein the air nozzle is formed such that its width increases and its height decreases in the end direction, and further provided with an angle adjustment means for adjusting the angle of the air nozzle to control the amount of fine particles separated into the first intake duct. Claim 6 An air splitter according to claim 1 or 3, wherein the classifying net is installed on a fixed frame, and the fixed frame is seated on a plurality of hanging devices including springs and turnbuckles to prevent vibrations generated by magnetic hammers (vibration means) installed on both sides of the fixed frame from being transmitted to the splitter body, and the installation angle of the classifying net is adjusted according to the length adjustment of the hanging devices to smoothly control the flow of sand. Claim 7 An air splitter according to claim 4, further comprising a blade cleaner coupled to one end of the blade to provide vibration so as not to adhere fine particles to the blade.

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