Sand powder separation device for concrete production

Abstract

The invention discloses a sand-powder separation device for concrete production, which comprises a dust removal box and a feeding assembly, two opposite sides of the dust removal box are respectively provided with a feeding port and a dust discharge port, the dust discharge port is connected with a dust collector, the bottom end of the dust removal box is provided with a sand discharge port, the feeding assembly comprises a feeding pipe and a material throwing pipe, the material throwing pipe is provided with a feeding end and a discharging end which are opposite, and the feeding end is connected with the discharging end. The feeding end is higher than the discharging end, the feeding end is connected to the feeding pipe, the discharging end is connected to the feeding port, the material throwing pipe is arranged to be an arc-shaped pipe which is bent downwards, and the discharging direction of the discharging end obliquely extends upwards relative to the horizontal direction. According to the sand and powder separation device for concrete production, more stone powder can be sucked away by the dust collector, so that the sand and powder separation effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of concrete processing, in particular to a sand and powder separation device for concrete production. Background Art

[0002] The sand and gravel processed by the sand making machine will contain some stone powder. When the stone powder content is too high, it will affect the quality of the manufactured concrete. Therefore, the stone powder needs to be separated from the sand and gravel. Using a vacuum cleaner to suck out the stone powder in the sand and gravel is one of the sand and powder separation methods. Specifically, a feed port and a dust outlet are respectively provided on the opposite sides of the dust removal box. A sand outlet is provided at the bottom of the dust removal box. The feed port is connected to a feed pipe, and the dust outlet is connected to a vacuum cleaner. The sand and gravel containing stone powder enter the dust removal box through the feed pipe. The lighter stone powder is sucked into the dust collector, and the heavier sand and gravel falls downward and is discharged from the sand outlet.

[0003] However, during use, it was found that after the sand and gravel containing stone powder entered the dust removal box, they stayed near the dust outlet for a very short time. In addition, the stone powder and sand and gravel gathered together, which resulted in some stone powder not having time to be sucked into the vacuum cleaner and being directly discharged from the sand outlet along with the sand and gravel, resulting in poor sand and powder separation effect. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a sand powder separation device for concrete production, which can make more stone powder be sucked away by a vacuum cleaner, thereby achieving a better sand powder separation effect.

[0005] According to an embodiment of the present invention, a sand and powder separation device for concrete production includes a dust removal box and a feeding assembly, wherein a feeding port and a dust exhaust port are respectively provided on opposite sides of the dust removal box, the dust exhaust port is connected to a dust collector, and a sand exhaust port is provided at the bottom end of the dust removal box, and the feeding assembly includes a feeding pipe and a throwing pipe, the throwing pipe has a relative feeding end and a discharging end, the feeding end is higher than the discharging end, the feeding end is connected to the feeding pipe, and the discharging end is connected to the feeding port, the throwing pipe is configured as a circular arc tube bent downward, and the discharging direction of the discharging end extends upwardly inclined relative to the horizontal direction.

[0006] The sand and powder separation device for concrete production according to the embodiment of the present invention has at least the following beneficial effects:

[0007] In the present invention, the feed pipe transports the sand and gravel containing stone powder into the throwing pipe, and then enters the dust removal box from the discharge end of the throwing pipe. The vacuum cleaner can suck out the lighter stone powder in the dust removal box, and the heavier sand and gravel can be discharged through the sand discharge port at the bottom of the dust removal box. Since the throwing pipe is configured as a circular arc pipe that bends downward, and the feed end of the throwing pipe is higher than the discharge end, the sand and gravel containing stone powder will convert potential energy into kinetic energy when passing through the throwing pipe. In addition, since the discharge direction of the discharge end extends upwardly with respect to the horizontal direction, the initial moving path of the sand and gravel containing stone powder after leaving the discharge end of the throwing pipe is roughly an upwardly arched parabola. In this way, not only the moving path of the stone powder is longer, and the time it stays near the dust discharge port is longer, so that more stone powder can be sucked in by the vacuum cleaner, and after being thrown out from the discharge end of the throwing pipe, the sand and gravel and stone powder can be quickly dispersed, and further more stone powder is sucked in by the vacuum cleaner, so that the sand and powder separation effect is better.

[0008] According to some embodiments of the present invention, the ejection tube is rotatably and adjustably arranged on the dust removal box, the rotation axis of the ejection tube is parallel to the arc center line of the ejection tube, and the ejection tube is configured such that during the rotation of the ejection tube, the inclination angle of the discharge direction of the discharge end changes.

[0009] According to some embodiments of the present invention, the feeding assembly also includes a mounting part, a flexible sealing sheet and a driving member. The mounting part is hinged to the dust removal box and penetrates the feeding port. The mounting part is provided with a mounting hole. The discharge end is cooperated and penetrates the mounting hole. The flexible sealing sheet is connected between the outer surface of the mounting part and the inner surface of the feeding port. The driving member is provided in the dust removal box and connected to the throwing tube or the mounting part to drive the throwing tube to rotate.

[0010] According to some embodiments of the present invention, the mounting portion is provided with a first air duct below the discharge end, the first air duct having a first air inlet end and a first air outlet end, the first air inlet end is connected to a first air inlet pipe, the first air outlet end is connected to the inner cavity of the dust removal box, and the air outlet direction of the first air outlet end extends upwardly inclined relative to the horizontal direction.

[0011] According to some embodiments of the present invention, the air outlet direction of the first air outlet end is parallel to the discharge direction of the discharge end; or, the inclination angle of the air outlet direction of the first air outlet end relative to the horizontal direction is greater than the inclination angle of the discharge direction of the discharge end relative to the horizontal direction.

[0012] According to some embodiments of the present invention, a guide plate is provided at the bottom end of the dust removal box, the sand discharge port is provided on the guide plate, the guide plate extends downwardly in a direction close to the sand discharge port, the guide plate is provided with a plurality of air supply parts, the air supply parts are provided with a second air duct, the second air duct has a second air inlet end and a second air outlet end, the second air inlet end is connected to a second air inlet pipe, and the second air outlet end is connected to the inner cavity of the dust removal box.

[0013] According to some embodiments of the present invention, the second air outlet extends into the dust removal box, and a first air outlet is provided on a side of the second air outlet close to the sand discharge port.

[0014] According to some embodiments of the present invention, one end of the air supply part close to the inner cavity of the dust removal box is configured to be cylindrical and is threadedly connected with an adjustment cap, and the opening of the first air outlet can be adjusted during the rotation of the adjustment cap.

[0015] According to some embodiments of the present invention, the air supply portion is provided with an air outlet head located in the dust removal box, and a side of the air outlet head facing away from the guide plate is provided with a plurality of second air outlets connected to the second air outlet end.

[0016] According to some embodiments of the present invention, the dust exhaust port is higher than the feed port.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a cross-sectional view of the present invention;

[0021] Figure 3 for Figure 2 Schematic diagram of the middle throwing tube in another position.

[0022] Figure 4 for Figure 2 The enlarged view of point A in the middle;

[0023] Figure 5 for Figure 2 The enlarged view of point B in the middle;

[0024] Figure 6 for Figure 2 Enlarged view of point C in the middle.

[0025] Figure Number:

[0026] Dust removal box 100; feed inlet 101; dust outlet 102; sand outlet 103; guide plate 104; air outlet 105; second air duct 106; second air inlet end 107; second air outlet end 108; second air inlet pipe 109; first air outlet 110; adjustment cap 111; air outlet head 112; second air outlet 113; sealing plate 114; air supply chamber 115;

[0027] Feed assembly 200; feed pipe 201; ejection pipe 202; feed end 203; discharge end 204; mounting portion 205; mounting hole 206; flexible sealing sheet 207; drive member 208; first air duct 209; first air inlet end 210; first air outlet end 211; first air inlet pipe 212. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0032] Reference below Figures 1 to 6 A sand and powder separation device for concrete production according to an embodiment of the present invention is described.

[0033] like Figures 1 to 4 As shown, the sand and powder separation device for concrete production according to an embodiment of the present invention includes a dust removal box 100 and a feeding assembly 200.

[0034] The dust removal box 100 has a feed port 101 and a dust discharge port 102 on opposite sides thereof, and the dust discharge port 102 is connected to a vacuum cleaner. Specifically, the dust discharge port 102 is connected to a dust conveying pipe, and the dust conveying pipe is connected to a vacuum cleaner. The vacuum cleaner can suck out light stone powder, while heavy sand and gravel cannot be sucked in by the vacuum cleaner, so it can be used to separate sand and gravel from stone powder. The bottom end of the dust removal box 100 is provided with a sand discharge port 103, and the sand discharge port 103 can be connected to a sand and gravel receiving box to receive sand and gravel.

[0035] The feed assembly 200 includes a feed pipe 201 and a throwing pipe 202. The feed pipe 201 can be a hose, and the throwing pipe 202 can be a hard pipe such as a steel pipe. The throwing pipe 202 has a relative feed end 203 and a discharge end 204. The feed end 203 is higher than the discharge end 204. The feed end 203 is connected to the feed pipe 201, for example, by a flange connection, and the discharge end 204 is connected to the feed port 101 to communicate with the inner cavity of the dust removal box 100. The throwing pipe 202 is configured as a circular arc tube that bends downward, so that the arc centerline of the throwing pipe 202 is located above the throwing pipe 202, and the arc centerline of the throwing pipe 202 is also the centerline of the circle where the arc contour of the throwing pipe 202 is located. The discharge direction of the discharge end 204 extends upwardly inclined relative to the horizontal direction.

[0036] In the present invention, the feed pipe 201 transports the sand and gravel containing stone powder into the throwing pipe 202, and then enters the dust removal box 100 from the discharge end 204 of the throwing pipe 202. The vacuum cleaner can suck out the lighter stone powder in the dust removal box 100, while the heavier sand and gravel can be discharged through the sand discharge port 103 at the bottom of the dust removal box 100. Since the ejection tube 202 is configured as a circular arc tube that bends downward, and the feed end 203 of the ejection tube 202 is higher than the discharge end 204, the sand and gravel containing stone powder will convert potential energy into kinetic energy when passing through the ejection tube 202. In addition, since the discharge direction of the discharge end 204 extends upwardly inclined relative to the horizontal direction, the sand and gravel containing stone powder will move in a roughly upwardly arched parabola after leaving the discharge end 204 of the ejection tube 202. In this way, not only is the movement path of the stone powder longer, but the time it stays near the dust outlet 102 is longer, so that more stone powder can be sucked into the vacuum cleaner, and after being thrown out from the discharge end 204 of the ejection tube 202, the sand and gravel and stone powder can be dispersed, so that more stone powder can be sucked into the vacuum cleaner, thereby achieving a better sand and powder separation effect.

[0037] In some embodiments of the present invention, Figure 2 and Figure 3As shown, the ejection tube 202 is rotatably and adjustably arranged on the dust removal box 100, and the rotation axis of the ejection tube 202 is parallel to the arc center line of the ejection tube 202. The ejection tube 202 is configured as follows: during the rotation of the ejection tube 202, the inclination angle of the discharge direction of the discharge end 204 changes. In this embodiment, the inclination angle of the discharge direction of the discharge end 204 can be adjusted by rotating the ejection tube 202. When the moving path of sand and gravel after being thrown out from the discharge end 204 of the ejection tube 202 is too high, causing some sand and gravel to enter the dust exhaust port 102, the inclination angle of the discharge direction of the discharge end 204 relative to the horizontal direction can be reduced, thereby reducing the height of the moving path of the sand and gravel after being thrown out from the discharge end 204 of the ejection tube 202, thereby preventing the sand and gravel from directly entering the dust exhaust port 102. When the moving path of stone powder after being thrown out from the discharge end 204 of the ejection tube 202 is too low, causing some stone powder to be unable to be sucked into the dust exhaust port 102, the inclination angle of the discharge direction of the discharge end 204 relative to the horizontal direction can be increased, thereby increasing the height of the moving path of the stone powder after being thrown out from the discharge end 204 of the ejection tube 202, thereby making it more convenient for the stone powder to be sucked into the dust exhaust port 102, and achieving a better sand and powder separation effect.

[0038] In some embodiments of the present invention, Figures 1 to 4 As shown, the feed assembly 200 also includes a mounting portion 205, a flexible sealing sheet 207 and a driving member 208. The mounting portion 205 is hinged to the dust removal box 100 and is arranged through the feed port 101. The mounting portion 205 is provided with a mounting hole 206. The discharge end 204 is arranged in the mounting hole 206. The flexible sealing sheet 207 is connected between the outer surface of the mounting portion 205 and the inner surface of the feed port 101. The driving member 208 is arranged in the dust removal box 100 and connected to the throwing tube 202 or the mounting portion 205 to drive the throwing tube 202 to rotate. For example, the driving member 208 can be a driving cylinder or a driving cylinder. Taking the driving cylinder as an example, one end of the driving cylinder can be arranged in the dust removal box 100, and the other end can be hinged to the throwing tube 202. The flexible sealing sheet 207 can be made of a flexible rubber sheet or other flexible sealing materials. Start the driving member 208, and the driving member 208 can drive the throwing tube 202 to rotate, which has a simple structure and is easy to operate. The flexible sealing sheet 207 is provided to prevent air and stone powder from passing through the feed port 101 on the side of the mounting portion 205, and the sealing performance is better. Moreover, the flexible sealing sheet 207 will not interfere with the rotation of the throwing tube 202 and the mounting portion 205, and the practicality is better. In addition, the discharge end 204 cooperates with the mounting hole 206 penetrated in the mounting portion 205, and then the flexible sealing sheet 207 only needs to seal the gap between the mounting portion 205 and the feed port 101, and the sealing effect is better, and the operation is simpler when sealing.

[0039] In some embodiments of the present invention, Figures 2 to 4As shown, the mounting portion 205 is provided with a first air duct 209 below the discharge end 204, the first air duct 209 having a first air inlet end 210 and a first air outlet end 211, the first air inlet end 210 is connected to a first air inlet pipe 212, the first air outlet end 211 is connected to the inner cavity of the dust removal box 100, and the air outlet direction of the first air outlet end 211 extends upwardly inclined relative to the horizontal direction.

[0040] The first air inlet pipe 212 may be connected to a fan, which transports air into the first air duct 209 through the first air inlet pipe 212, and the air is discharged through the first air outlet end 211. Since the air outlet direction of the first air outlet end 211 extends upwardly inclined relative to the horizontal direction, after the sand and stone powder are thrown out from the discharge end 204 of the throwing pipe 202, the wind blown out from the first air outlet end 211 can blow towards the sand and stone powder, thereby enabling the stone powder and sand to be dispersed more quickly, and the stone powder can be closer to the dust exhaust port 102, so that more stone powder can be sucked into the dust exhaust port 102, and the sand and powder separation effect is better. In addition, the first air duct 209 is arranged on the mounting portion 205. When the mounting portion 205 drives the ejection tube 202 to rotate and the discharge direction of the discharge end 204 of the ejection tube 202 changes, the air outlet direction of the first air duct 209 can change accordingly, so that the wind blown out of the first air duct 209 can disperse the stone powder and sand and gravel more effectively, and can make the stone powder closer to the dust exhaust port 102, so that more stone powder can be sucked into the dust exhaust port 102, and the sand and powder separation effect is better.

[0041] In some embodiments of the present invention, Figures 2 to 4 As shown, the air outlet direction of the first air outlet end 211 is parallel to the discharge direction of the discharge end 204. With such a configuration, the air blown out of the first air duct 209 can be blown more accurately toward the stone powder and sand and gravel, so that the air blown out of the first air duct 209 can disperse the stone powder and sand and gravel better, and can make the stone powder closer to the dust discharge port 102, so that more stone powder can be sucked into the dust discharge port 102, and the sand powder separation effect is better.

[0042] It should be noted that, in some other embodiments of the present invention, the inclination angle of the air outlet direction of the first air outlet end 211 relative to the horizontal direction may also be greater than the inclination angle of the discharge direction of the discharge end 204 relative to the horizontal direction. In this way, the wind blown out of the first air duct 209 can also be blown more accurately to the stone powder and sand and gravel, thereby making the wind blown out of the first air duct 209 disperse the stone powder and sand and gravel better, and making the stone powder closer to the dust outlet 102, thereby making more stone powder be sucked into the dust outlet 102, and the sand powder separation effect is better.

[0043] In some embodiments of the present invention, Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, a guide plate 104 is provided at the bottom end of the dust removal box 100, and a sand discharge port 103 is provided on the guide plate 104. The guide plate 104 extends downwardly in a direction close to the sand discharge port 103. The guide plate 104 is provided with a plurality of air supply parts 105. The air supply part 105 is provided with a second air duct 106. The second air duct 106 has a second air inlet end 107 and a second air outlet end 108. The second air inlet end 107 is connected to a second air inlet pipe 109, and the second air outlet end 108 is connected to the inner cavity of the dust removal box 100. For example, the sand discharge port 103 can be arranged in the middle position of the guide plate 104, the cross-section of the guide plate 104 is an inverted V shape, the guide plate 104 can be provided with a plurality of through holes, the air supply part 105 can be penetrated through the through holes, and the end of the air supply part 105 close to the inner cavity of the dust removal box 100 can be located in the dust removal box 100, the second air inlet end 107 of the second air duct 106 is connected to the second air inlet pipe 109, the second air inlet pipe 109 is connected to the fan, and the second air outlet end 108 of the second air duct 106 is connected to the inner cavity of the dust removal box 100, and the fan can supply air to the second air duct 106 through the second air inlet pipe 109, and then supply air to the inner cavity of the dust removal box 100 through the second air outlet end 108.

[0044] In this embodiment, the guide plate 104 extends downwardly in a direction close to the sand discharge port 103, which makes it easier for the sand and gravel that fall on the guide plate 104 to slide into the sand discharge port 103. In addition, an air supply unit 105 is provided, and the fan can supply air from the vicinity of the guide plate 104 to the inner cavity of the dust removal box 100 through the air supply unit 105. In this way, not only can a small amount of stone powder near the guide plate 104 be blown to the top of the dust removal box 100, and then sucked into the dust discharge port 102, so as to better remove the stone powder and better separate the sand and powder. In addition, the wind blown out by the air supply unit 105 can also blow toward the sand and gravel, so that the friction between the sand and gravel and the guide plate 104 is lower, so that the sand and gravel are in a flowing state, and thus the accumulation of sand and gravel can be avoided, so that the sand and gravel on the guide plate 104 can slide more smoothly into the sand discharge port 103, and the sand and gravel discharge effect is better.

[0045] It should be noted that, in some embodiments of the present invention, Figure 2 and Figure 3 As shown, the dust removal box 100 is provided with a sealing plate 114 on the side of the guide plate 104 away from the inner cavity of the dust removal box 100, and an air supply cavity 115 is formed between the sealing plate 114 and the guide plate 104. The second air inlet pipe 109 can be connected to the air supply cavity 115, and the second air inlet end 107 is connected to the air supply cavity 115. In this way, the second air inlet pipe 109 only needs to supply air to the air supply cavity 115, and can supply air to all the second air ducts 106, without the need for each second air duct 106 to be separately connected to a second air inlet pipe 109, so the structure is simpler and the air supply is more convenient.

[0046] In some embodiments of the present invention, Figure 5 As shown, the second air outlet 108 extends into the dust removal box 100, and a first air outlet 110 is provided on a side of the second air outlet 108 close to the sand outlet 103. The first air outlet 110 is located on a side of the second air outlet 108 close to the sand outlet 103. This arrangement can not only reduce the situation where sand and gravel block the first air outlet 110, but also the air outlet direction of the first air outlet 110 is the same as the downward tilt direction of the guide plate 104, thereby driving the sand and gravel flow better, so that the sand and gravel on the guide plate 104 can slide more smoothly into the sand outlet 103, and the sand and gravel discharge effect is better.

[0047] In some embodiments of the present invention, Figure 5 As shown, one end of the air supply part 105 close to the inner cavity of the dust removal box 100 is set to be cylindrical and is threadedly connected with an adjusting cap 111. The adjusting cap 111 can adjust the opening of the first air outlet 110 during rotation. For example, the outer wall of the end of the air supply part 105 close to the inner cavity of the dust removal box 100 can be provided with an external thread, the adjusting cap 111 is provided with a connecting hole, and the inner wall of the connecting hole can be provided with an internal thread. The adjusting cap 111 is threadedly connected to the end of the air supply part 105 close to the inner cavity of the dust removal box 100 through the matching of the internal thread and the external thread. The adjusting cap 111 can be rotated to move the adjusting cap 111 along the axial direction of the air supply part 105, so that the adjusting cap 111 can gradually open or close the first air outlet 110, thereby adjusting the opening of the first air outlet 110.

[0048] In this embodiment, an adjustment cap 111 is provided to adjust the opening of the first air outlet 110 according to the gradation of the sand and gravel, that is, the particle size of the sand and gravel. When the particle size of the sand and gravel is large, the opening of the first air outlet 110 can be increased to make the blown wind larger, and even if the particle size of the sand and gravel is large, the sand and gravel can still be blown, so that the sand and gravel on the guide plate 104 can slide more smoothly into the sand discharge port 103, and the sand and gravel discharge effect is better. When the particle size of the sand and gravel is small, the opening of the first air outlet 110 can be reduced, which can not only prevent the sand and gravel with a small particle size from entering the first air outlet 110 and blocking the first air outlet 110, but also reduce the wind blown out of the first air outlet 110, which can prevent the sand and gravel from flying around due to excessive wind and reduce the discharge effect of the sand and gravel.

[0049] It should be noted that the outer surface of the adjusting cap 111 may be an arc surface to reduce the interference of the adjusting cap 111 on the flow of sand and gravel.

[0050] In some embodiments of the present invention, Figure 6As shown, the air supply unit 105 is provided with an air outlet 112 located in the dust removal box 100, and a plurality of second air outlets 113 connected to the second air outlet end 108 are provided on the side of the air outlet 112 away from the guide plate 104. In addition to the first air outlet 110 being provided on the side of the second air outlet end 108 close to the sand discharge port 103, the end of the air supply unit 105 close to the inner cavity of the dust removal box 100 is set to be cylindrical and threadedly connected with an adjustment cap 111, a small number of air supply units 105 can also be directly provided with a plurality of second air outlets 113 connected to the second air outlet end 108 on the side of the air outlet 112 away from the guide plate 104. In this way, the second air outlet 113 blows air directly in the direction away from the guide plate 104, and the blown wind can directly drive the stone powder near the guide plate 104 to move to the top of the dust removal box 100, and then can be quickly sucked into the dust discharge port 102, so as to better remove the stone powder and better separate the sand powder.

[0051] It should be noted that the outer surface of the air outlet head 112 may be an arc surface to reduce the interference of the air outlet head 112 on the flow of sand and gravel.

[0052] It can be understood that among all the air supply parts 105, most of the air supply parts 105 are provided with a first air outlet 110 on the side of the second air outlet end 108 close to the sand discharge port 103, and the end of the air supply part 105 close to the inner cavity of the dust removal box 100 is set to a cylindrical shape and is threadedly connected with an adjustment cap 111, and a small number of the air supply parts 105 are provided with an air outlet head 112, and a plurality of second air outlets 113 connected to the second air outlet end 108 are provided on the side of the air outlet head 112 facing away from the guide plate 104.

[0053] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the dust outlet 102 is higher than the feed inlet 101. Such a configuration can prevent the sand and gravel from being thrown out from the discharge end 204 of the throwing tube 202 and falling directly into the dust outlet 102. Moreover, since the stone powder is thrown out from the discharge end 204 of the throwing tube 202 and roughly forms a parabola extending upward, and the dust outlet 102 is higher than the feed inlet 101, the stone powder can just pass near the dust outlet 102, and can be quickly sucked in by the dust outlet 102, so that the effect of removing the stone powder is better and the effect of separating the sand and powder is better.

[0054] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A sand powder separation device for concrete production, characterized in that: include: A dust removal box, wherein a feed port and a dust discharge port are respectively provided on opposite sides of the dust removal box, a dust collector is connected to the dust discharge port, and a sand discharge port is provided at the bottom end of the dust removal box; A feeding assembly includes a feeding pipe and a throwing pipe, wherein the throwing pipe has a relative feeding end and a discharging end, wherein the feeding end is higher than the discharging end, the feeding end is connected to the feeding pipe, and the discharging end is connected to the feeding port, the throwing pipe is configured as a circular arc tube bent downward, and the discharging direction of the discharging end extends upwardly inclined relative to the horizontal direction.

2. The sand and powder separation device for concrete production according to claim 1, characterized in that: The ejector tube is rotatably and adjustably arranged on the dust removal box, the rotation axis of the ejector tube is parallel to the arc center line of the ejector tube, and the ejector tube is configured such that during the rotation of the ejector tube, the inclination angle of the discharge direction of the discharge end changes.

3. The sand and powder separation device for concrete production according to claim 2, characterized in that: The feed assembly also includes: A mounting portion, hinged to the dust removal box and passing through the feed port, the mounting portion being provided with a mounting hole, the discharge end being cooperatively passed through the mounting hole; A flexible sealing sheet connected between the outer surface of the mounting portion and the inner surface of the feed port; The driving member is arranged in the dust removal box and connected to the material throwing tube or the mounting portion to drive the material throwing tube to rotate.

4. The sand and powder separation device for concrete production according to claim 3, characterized in that: The mounting portion is provided with a first air duct below the discharge end, the first air duct having a first air inlet end and a first air outlet end, the first air inlet end is connected to a first air inlet pipe, the first air outlet end is communicated with the inner cavity of the dust removal box, and the air outlet direction of the first air outlet end extends upwardly inclined relative to the horizontal direction.

5. The sand and powder separation device for concrete production according to claim 4, characterized in that: The air outlet direction of the first air outlet end is parallel to the material outlet direction of the material outlet end; or, The inclination angle of the air outlet direction of the first air outlet end relative to the horizontal direction is greater than the inclination angle of the discharge direction of the discharge end relative to the horizontal direction.

6. The sand and powder separation device for concrete production according to any one of claims 1 to 5, characterized in that: A guide plate is provided at the bottom end of the dust removal box, the sand discharge port is provided on the guide plate, the guide plate extends downwardly in a direction close to the sand discharge port, the guide plate is provided with a plurality of air supply parts, the air supply parts are provided with a second air duct, the second air duct has a second air inlet end and a second air outlet end, the second air inlet end is connected to a second air inlet pipe, and the second air outlet end is communicated with the inner cavity of the dust removal box.

7. The sand and powder separation device for concrete production according to claim 6, characterized in that: The second air outlet extends into the dust removal box, and a first air outlet is provided on a side of the second air outlet close to the sand discharge port.

8. The sand and powder separation device for concrete production according to claim 7, characterized in that: One end of the air supply part close to the inner cavity of the dust removal box is set to a cylindrical shape and is threadedly connected with an adjustment cap, and the opening of the first air outlet can be adjusted during the rotation of the adjustment cap.

9. The sand and powder separation device for concrete production according to claim 6, characterized in that: The air supply part is provided with an air outlet head located in the dust removal box, and a side of the air outlet head away from the guide plate is provided with a plurality of second air outlets connected to the second air outlet end.

10. The sand and powder separation device for concrete production according to any one of claims 1 to 5, characterized in that: The dust exhaust port is higher than the feed port.

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