A waste concrete block separation device

Abstract

A waste concrete block separation device comprises a double-layer rotary cylinder, which comprises an inner cylinder and an outer cylinder, wherein a separation chamber is formed inside the inner cylinder, and the separation chamber is connected to the outside of the outer cylinder through a feed side opening and a discharge side opening on the inner cylinder, and through holes are distributed on the inner cylinder; a detachable separation block is distributed on the inner wall of the inner cylinder, and the separation block comprises a liner and a lifting impact body fixed thereon, wherein the side of the lifting impact body facing the rotation direction is a concave surface, a sliding impact body is arranged on the concave surface, and a throwing impact body is arranged on the other side of the lifting impact body, and the thickness of the lifting impact body, the sliding impact body, and the throwing impact body gradually decreases from the root to the top; the outer cylinder and the inner cylinder form a grinding chamber, wherein the discharge port of the grinding chamber and the discharge side opening of the separation chamber are located on the same side and the positions of the two are staggered, and a grinding medium is placed in the grinding chamber. The device separates coarse aggregate, fine aggregate, and hardened cement slurry and improves the separation efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of construction waste concrete treatment, and in particular relates to a waste concrete block separation device. Background Art

[0002] When buildings are demolished, the waste concrete generated is cut and crushed mechanically at the construction site. After the steel bars are separated and recycled manually, the remaining waste concrete blocks of varying sizes are treated as construction waste.

[0003] Concrete is formed by hardened cement paste tightly combining coarse aggregate (stone) and fine aggregate (sand), of which coarse aggregate accounts for about 50% and has a certain compressive strength. The strength of the interface between the coarse aggregate and the hardened cement mortar (fine aggregate and hardened cement paste) is lower than the strength of the coarse aggregate itself. Therefore, the concrete as a whole is a non-homogeneous structure (the coarse aggregate is a homogeneous structure). As the service life of concrete increases, the tightness of the combination of coarse aggregate and hardened cement mortar gradually decreases, and the corresponding buildings need to be demolished, and the concrete in them will become waste concrete. At present, the method for recycling waste concrete is to crush the waste concrete with a crusher and then recycle it. For example, CN 216137336 U discloses a concrete waste crushing and separation device. The existing common crushing method can only crush the concrete from large to small in particle size. In the crushed concrete, some coarse aggregates will destroy the integrity of the original coarse aggregate particle size, and some coarse aggregates will be covered with cement mortar, which cannot achieve the purpose of separating coarse aggregates and fine aggregates. In addition, the coarse aggregates are easily damaged, which reduces the recovery rate of the coarse aggregates. Summary of the invention

[0004] In order to solve the technical problem that the prior art cannot separate coarse aggregate and fine aggregate, the present invention provides a waste concrete block separation device.

[0005] The purpose of the present invention is to be achieved by adopting the following technical solutions. A waste concrete block separation device proposed in the present invention comprises a double-layer rotating cylinder, the double-layer rotating cylinder comprises an inner cylinder, an outer cylinder sleeved and fixed on the inner cylinder, a separation chamber is formed inside the inner cylinder, the separation chamber is connected to the outside of the outer cylinder through a feed side opening and a discharge side opening on the inner cylinder, and through holes are distributed on the inner cylinder for hardened cement mortar to leak out; detachable separation blocks are distributed on the inner wall of the inner cylinder, the separation blocks comprise a lining plate connected to the inner cylinder, a lining plate fixed on the lining plate and on the top A lifting impact body is formed with a straight blade, the side of the lifting impact body facing the rotation direction is a concave surface, a sliding impact body with a top formed with an arc-shaped blade is arranged on the concave surface, and a dropping impact body with a top formed with an arc-shaped blade is arranged on the other side of the lifting impact body, and the thickness of the lifting impact body, the sliding impact body and the dropping impact body gradually decreases from the root to the top; the outer cylinder and the inner cylinder form a grinding chamber, the discharge port of the grinding chamber and the discharge side opening of the separation chamber are located on the same side and the positions of the two are staggered with each other, and the grinding medium is placed in the grinding chamber.

[0006] Compared with the prior art, the benefits of this technical solution are:

[0007] A separation block is arranged in the inner cylinder, and a lifting impact body is arranged on the separation block, which has the dual functions of lifting and impact separation. A concave surface is arranged on the side of the lifting impact body facing the rotation direction, so as to lift the waste concrete block to increase the impact kinetic energy, and at the same time cooperate with the falling impact body to impact and separate the thrown waste concrete block, and the sliding impact body impacts and separates the sliding waste concrete block, thereby expanding the impact range of the separation block, increasing the impact hit probability, and improving the separation efficiency; a linear blade is adopted on the impact body to split and separate the waste concrete, thereby increasing the impact hit probability and realizing the separation of coarse aggregate and hardened cement mortar; the hardened cement slurry enters the outer cylinder for grinding, so as to realize the separation of fine aggregate and hardened cement slurry.

[0008] Furthermore, the diameter of the through hole is 5 mm.

[0009] Compared with the prior art, the benefits of this technical solution are:

[0010] The diameter of the through hole is smaller than the minimum particle size of the coarse aggregate, so as to prevent the separated coarse aggregate from leaking out of the through hole, while allowing the separated hardened cement mortar to leak out of the through hole.

[0011] Furthermore, the separation blocks are distributed on the inner wall of the inner cylinder along the circumferential direction and the axial direction.

[0012] Compared with the prior art, the benefits of this technical solution are:

[0013] The lifting impact body raises the height of the waste concrete block, and then when it is thrown down or slides down, it can hit the separation block in the same circumferential direction, thereby improving the separation efficiency.

[0014] Furthermore, the straight blade portion is perpendicular to the rotation direction.

[0015] Compared with the prior art, the benefits of this technical solution are:

[0016] It is easy to carry and throw away more waste concrete blocks, improving separation efficiency.

[0017] Furthermore, the root of the falling impact body is arranged on the outer surface of the lining plate and the other side of the lifting impact body, and the arc-shaped blade of the falling impact body extends from the side of the lifting impact body to the outer surface of the lining plate.

[0018] Compared with the prior art, the benefits of this technical solution are:

[0019] The length of the arc-shaped blade is increased. When the waste concrete block is thrown down under the action of gravity and hits the arc-shaped blade of the thrown impact body, the probability of hitting is increased, thereby realizing the rapid and effective separation of coarse aggregate and mortar.

[0020] Furthermore, the arc-shaped blades of the sliding impact body and the throwing impact body are perpendicular to the straight-line blade of the lifting impact body.

[0021] Compared with the prior art, the benefits of this technical solution are:

[0022] The arc-shaped blades of the sliding impact body and the falling impact body and the straight blades of the lifting impact body distributed on the inner cylinder form an interval network, thereby increasing the impact hit rate of the waste concrete blocks.

[0023] Furthermore, a perforated plate is arranged on the discharge side of the outer cylinder, an opening for the inner cylinder to pass through is arranged on the perforated plate, and waist-shaped holes extending circumferentially and serving as the discharge port of the grinding chamber are distributed on the perforated plate.

[0024] Compared with the prior art, the benefits of this technical solution are:

[0025] The separated mixed material is discharged from the waist-shaped hole. The waist-shaped hole has a larger hole section, which can unload the material faster and prevent the grinding medium from falling.

[0026] Furthermore, a feed barrel is arranged on the feed side of the double-layer rotating cylinder, and both ends of the feed barrel are open. The discharge end of the feed barrel is nested and engaged in the feed port of the double-layer rotating cylinder, and the two rotate in cooperation; the feed end of the feed barrel faces upward.

[0027] Compared with the prior art, the benefits of this technical solution are:

[0028] The feed port of the device is relatively fixed, so that the operator can pour the waste concrete blocks into the device conveniently.

[0029] Furthermore, a discharge barrel is arranged on the discharge side of the double-layer rotating cylinder, and the feed end of the discharge barrel is sleeved and engaged on the discharge end of the outer cylinder and the two are rotatably matched; a mortar hopper close to the discharge port of the grinding chamber and a coarse aggregate hopper close to the discharge side opening of the inner cylinder are arranged at the bottom of the discharge barrel.

[0030] Compared with the prior art, the benefits of this technical solution are:

[0031] The separated materials are discharged through corresponding hoppers and can be classified and transported separately.

[0032] Furthermore, a dust hopper connected to an air intake duct of an air extractor is provided on the top of the discharge barrel.

[0033] Compared with the prior art, the benefits of this technical solution are:

[0034] During the operation and dumping process of the device, it can be used to absorb the generated dust and reduce dust pollution.

[0035] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is an overall schematic diagram of an embodiment of the present invention;

[0037] Figure 2 for Figure 1 A cross-sectional view of

[0038] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0039] Figure 4 for Figure 2 The overall schematic diagram of the separation block;

[0040] Figure 5 for Figure 2 Schematic diagram of the working principle of the separation block. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] An embodiment of a waste concrete block separation device of the present invention is as follows Figures 1 to 5 As shown, the device comprises a double-layer rotary cylinder 1, a feed cylinder 2, a driving device 3, a support frame 4, and a discharge cylinder 5. The double-layer rotary cylinder 1 performs rotary motion under the drive of the driving device 3.

[0043] The double-layer rotary cylinder 1 comprises an inner cylinder 101 and an outer cylinder 102 sleeved on the inner cylinder 101. In this embodiment, the inner cylinder 101 and the outer cylinder 102 are coaxially arranged.

[0044] The inner cylinder 101 has openings at both ends and both ends are fixed to the corresponding ends of the outer cylinder 102, and a separation chamber 103 is formed inside the inner cylinder 101. The separation chamber 103 is connected to the outside of the outer cylinder 102 through the feed side opening and the discharge side opening on the inner cylinder 101.

[0045] The inner cylinder 101 has through holes 107 on its wall, and the diameter of the through holes 107 is smaller than the minimum particle size of the coarse aggregate to prevent the separated coarse aggregate from leaking out from the through holes 107. In order to ensure that the coarse aggregate shaped by the separation chamber 103 does not leak out from the through holes 107, and to allow the separated hardened cement mortar to leak out from the through holes 107, the diameter of the through holes is 5 mm. The waste concrete blocks enter the separation chamber 103 from the opening on the feeding side of the inner cylinder, and are separated into coarse aggregate and hardened cement mortar. The coarse aggregate can be discharged from the opening on the discharging side, and the hardened cement mortar can leak out from the through holes 107.

[0046] The inner wall of the inner cylinder 101 is provided with detachable separation blocks 109, which are circumferentially and axially distributed on the inner wall of the inner cylinder 101. The separation blocks 109 include a liner 10901 detachably connected to the inner wall of the inner cylinder 101. Grooves are provided at corresponding positions of the inner cylinder 101 and the separation blocks 109. The liner 10901 is nested in the grooves, and then the liner is detachably connected to the inner wall of the inner cylinder 101 by bolts or other connection methods. When the separation block 109 is damaged, the damaged separation block can be removed separately for replacement. In this embodiment, the outer surface of the liner 10901 is flush with the inner wall of the inner cylinder 101 after installation.

[0047] A lifting impact body 10902 is provided on the outer surface of the liner 10901. The width of the lifting impact body 10902 gradually decreases from the root to the top, and a straight blade is formed at the top. The side of the lifting impact body 10902 facing the rotation direction of the double-layer rotary cylinder is a concave surface. When the lifting impact body 10902 rotates accordingly, it is convenient to drive the waste concrete blocks to run from the bottom to the top of the separation chamber. In addition, the waste concrete blocks are thrown downward under the action of gravity during the upward movement, and hit the inner wall of the inner cylinder 101. The waste concrete blocks collide with themselves to achieve the separation of coarse aggregate and hardened cement mortar. In order to achieve rapid separation, the present invention sets a lifting impact body 10902, and the waste concrete blocks are thrown on the straight blade of the lifting impact body 10902, which can achieve rapid and effective separation of coarse aggregate and hardened cement mortar. In this embodiment, the straight blade is perpendicular to the rotation direction, and both sides of the lifting impact body 10902 are arc-shaped concave surfaces, which are convenient for carrying and throwing more waste concrete blocks, thereby improving separation efficiency.

[0048] A sliding impact body 10903 is arranged on the side of the lifting impact body 10902 facing the rotation direction, and the thickness of the sliding impact body gradually decreases from the root to the top, and an arc-shaped blade is formed on the top. The arc-shaped blade of the sliding impact body 10903 extends from the root to the top of the sliding impact body 10903, increasing the length of the arc-shaped blade. When the waste concrete block slides along the inner wall of the rotating inner cylinder 101 under the action of gravity and hits the arc-shaped blade of the sliding impact body 10903, the line contact length with the waste concrete block can be increased, so that the coarse aggregate and the hardened cement mortar can be separated quickly and effectively.

[0049] A drop impact body 10904 is arranged on the other side of the lifting impact body 10902, and the root of the drop impact body 10904 is arranged on the outer surface of the lining plate 10901 and the other side of the lifting impact body 10902 at the same time to increase the length of its blade. The thickness of the drop impact body 10904 gradually decreases from the root to the top, and an arc-shaped blade is formed on its top. The arc-shaped blade of the drop impact body 10904 extends from the side of the lifting impact body 10902 to the outer surface of the lining plate 10901, increasing the length of the arc-shaped blade. When the waste concrete block is thrown and hits the arc-shaped blade of the drop impact body 10904 under the action of gravity, the probability of impact is increased, and the coarse aggregate and mortar are separated quickly and effectively. In this embodiment, the arc-shaped blades of the sliding impact body 10903 and the drop impact body 10904 are perpendicular to the straight blade of the lifting impact body 10902, increasing the impact hit rate of the waste concrete block.

[0050] During the rotation of the double-layer rotating cylinder 1, the discarded concrete blocks in the inner cylinder 101 are brought to a certain height under the action of the rotation speed and the lifting impact body 10902. Some of the discarded concrete blocks slide along the cylinder and collide with the sliding impact body 10903 to be split and separated; some of the discarded concrete blocks are brought to a certain height and thrown down under the action of centrifugal force and gravity. When falling, they collide with the lifting impact body 10902 or the throwing impact body 10904 to be separated.

[0051] There is no grinding body in the inner cylinder 101. Taking advantage of the large size of the waste concrete blocks, the waste concrete blocks are lifted to a certain height by rotating the double-layer rotating cylinder 1. Under the action of gravity, the waste concrete blocks are thrown or slide to the bottom of the double-layer rotating cylinder 1 and collide and separate with each other. In order to improve the separation efficiency, the present invention has a separation block 109 on the inner wall of the cylinder, and the separation block 109 is provided with a lifting impact body 10902, a sliding impact body 10903, and a throwing impact body 10904; the lifting impact body 10902 has the dual functions of lifting and separating materials, lifting the waste concrete blocks to a higher height, increasing the kinetic energy during the collision, and enhancing the separation effect; the lifting impact body 10902 has a straight blade, and the waste concrete blocks hit the straight blade, and the straight blade splits and cuts the waste concrete blocks to achieve separation; the arc-shaped blades on the sliding impact body 10903 and the throwing impact body 10904 can realize the separation function of sliding and throwing waste concrete blocks, increase the probability of collision with the waste concrete blocks in the separation chamber, and the shape of the arc-shaped blade can increase its own length, and can also increase the probability of collision with the waste concrete blocks, ultimately achieving improved separation efficiency.

[0052] During the rotation of the double-layer rotary cylinder, the waste concrete blocks are hit for many times to ensure that the waste concrete blocks in the inner cylinder are fully separated; the coarse aggregate formed after separation will not be damaged after being hit again due to its high strength. If the edge of the coarse aggregate is hit, the coarse aggregate can be shaped; after the double-layer rotary cylinder 1 rotates for a period of time, the waste concrete blocks inside it are fully separated and the coarse aggregate is shaped. An opening connected to the outside is set on the discharge side of the inner cylinder 101, and the coarse aggregate that meets the particle size requirements after crushing and separation is discharged through the opening.

[0053] During the collision process, the waste concrete blocks of the present invention are mainly in contact with the separation blocks in a line contact manner. In the prior art, when the waste concrete blocks are crushed, the contact manners with the corresponding structures are usually surface contact and point contact. The impact force generated by the surface contact manner is directed toward the waste concrete blocks themselves and the impact force is relatively dispersed. All parts of the waste concrete blocks themselves are subjected to force. Since the coarse aggregate in the waste concrete blocks is relatively strong, the coarse aggregate will prevent further separation of the waste concrete blocks, resulting in the worst separation effect. The impact force generated by the point contact manner is in a radial direction. The waste concrete blocks are subjected to radial impact forces, which separate the coarse aggregate from the mortar. The separation effect on the waste concrete is better than that of the surface contact. However, if the coarse aggregate is subjected to the impact of the point contact, it is easily damaged. In addition, the point contact force point is small, and only The impact point falls exactly on the appropriate position of the discarded concrete block (the junction of coarse aggregate and hardened cement mortar) to achieve separation, but the separation efficiency is low and requires a long operation time; the direction of the impact force generated by the line contact method is from the middle of the line toward both sides, which has a splitting and cutting effect on the discarded concrete block, making it easy to separate the coarse aggregate from the hardened cement mortar, and the line contact method has a high probability of contact with the discarded concrete block, which can increase the probability of impact and improve the separation efficiency; and in this embodiment, the thickness of each impact body gradually decreases from the root to the top, and there is a transitional arc surface from the top to the root. When the blade of the impact body contacts the coarse aggregate in the discarded concrete block, the discarded concrete block slides to one side due to the transitional arc surface from the blade to the root of the impact body, thereby avoiding damage to the coarse aggregate.

[0054] The outer cylinder 102 and the inner cylinder 101 form a grinding chamber 104, the feeding side of the grinding chamber 104 is closed, and the discharging side is connected to the outside. A grinding medium 108 is placed in the grinding chamber 104. In this embodiment, the grinding medium 108 is a grinding ball. After the mortar leaks out from the through hole 107 and enters the grinding chamber 104, as the double-layer rotary cylinder 1 rotates, the grinding medium 108 and the mortar rotate in the grinding chamber 104, so that the grinding balls grind the hardened cement mortar, so that the hardened cement slurry and fine aggregate in the hardened cement mortar are separated, and the mixture formed by the separated hardened cement slurry and fine aggregate is discharged from the discharging side opening of the outer cylinder.

[0055] In this embodiment, an end cover 105 is provided on the feed side of the outer cylinder 102, and a feed port 106 is provided on the end cover 105; the feed end of the inner cylinder 101 is fixed on the inner wall of the end cover 105, and the feed side opening of the inner cylinder 101 is connected with the feed port 106 on the end cover; a perforated plate 110 is provided on the discharge side of the outer cylinder 102, and an opening is provided on the orifice plate 110 for the inner cylinder 101 to pass through, and the orifice plate 110 is distributed with waist-shaped holes extending circumferentially as the discharge port of the grinding chamber, and the separated mixed material is discharged from the waist-shaped holes, and the orifice plate can prevent the grinding balls from falling.

[0056] The double-layer rotary cylinder 1 rotates, and the waste concrete blocks enter the inner cylinder 101 through the feed port 106. The coarse aggregate (stone) and mortar (a mixture of fine aggregate and hardened cement paste) in the waste concrete blocks are separated by utilizing the large particle size of the waste concrete blocks and the self-separation through the separation blocks. During the separation, the integrity of the original coarse aggregate particle size of the concrete can be effectively guaranteed (the crusher may reduce the coarse aggregate particle size), and the coarse aggregate can be properly shaped to remove the edges and corners of the original coarse aggregate. A 5mm through hole 107 is provided on the inner cylinder 101 to perform the initial screening of the separated coarse aggregate and hardened cement mortar. The coarse aggregate remains in the inner cylinder 101, and the hardened cement mortar falls into the grinding chamber 104 from the through hole 107. The grinding medium 108 in the grinding chamber 104 separates the fine aggregate and the hardened cement paste by grinding.

[0057] After the double-layer rotary cylinder 1 rotates for a period of time, the coarse aggregate, fine aggregate, and hardened cement paste are separated, and the coarse aggregate remains in the inner cylinder 101, and the fine aggregate and hardened cement paste remain in the grinding chamber 104. The lifting device provided by the present invention itself or an external lifting device is used to tilt the double-layer rotary cylinder 1, the feed side is relatively raised, and the discharge side is relatively lowered, so that the coarse aggregate, fine aggregate, and hardened cement paste in the cylinder are discharged. The discharge positions of the inner cylinder 101 and the outer cylinder 102 are staggered, so that the coarse aggregate and the mixture of fine aggregate and hardened cement paste are discharged from different positions respectively, so as to achieve the separation of the two. A sand screen with a specific aperture can be used to separate fine aggregate from hardened cement paste as needed.

[0058] In this embodiment, a support groove 111 is arranged around the outer wall of the outer cylinder 102, and the cross section of the support groove 111 is arc-shaped. A support frame 4 is arranged on the working surface where the device is located, and a roller 401 is arranged on the top of the support frame 4, and the top of the roller 401 is nested in the support groove 111. When the device dumps materials, the support frame 4 remains on the working surface, and the roller 401 is separated from the support groove 111. The support frame 4 provides support for the double-layer rotating cylinder 1, and can reduce the rotational friction when the double-layer rotating cylinder 1 rotates. The number of support frames 4 and support grooves 111 can be determined according to the length of the double-layer rotating cylinder 1 to maintain the stable operation of the double-layer rotating cylinder.

[0059] In this embodiment, a driven gear 112 is arranged around the outer wall of the outer cylinder 102, and the driven gear 112 is meshed with the driving gear 301 on the driving device to drive the double-layer rotary cylinder 1 to rotate. The driving device is arranged on the working surface where the device is located, and when the device dumps the material, the driven gear 112 is disengaged from the driving gear 301.

[0060] In this embodiment, in order to facilitate the pouring of waste concrete blocks into the double-layer rotary cylinder 1, a feed barrel 2 is arranged on the feeding side of the double-layer rotary cylinder 1, and the two ends of the feed barrel 2 are opened. The discharge end of the feed barrel 2 is nested and engaged in the feed port 106 of the double-layer rotary cylinder 1, and the two rotate in coordination. In this embodiment, the feed barrel can be rotated and coordinated with the double-layer rotary cylinder 1 through a bearing, and the position of the feed barrel 2 is relatively fixed when the double-layer rotary cylinder 1 rotates. In this embodiment, the feed barrel 2 is arranged on the working surface where the device is located, and the feed barrel 2 is separated from the working surface when the device dumps the material. The feed end of the feed barrel 2 faces upward, which is convenient for pouring waste concrete blocks into the feed barrel 2. From the feed end to the discharge end, the height gradually decreases, so that the waste concrete blocks flow into the double-layer rotary cylinder 1.

[0061] In this embodiment, a discharge barrel 5 is arranged on the discharge side of the double-layer rotary cylinder 1. The feed end of the discharge barrel 5 is sleeved and engaged with the discharge end of the outer cylinder 102 and the two are rotated together. In this embodiment, a bearing can be used to make the discharge barrel 5 rotate and cooperate with the outer cylinder 102. When the outer cylinder 102 rotates, the discharge barrel 5 remains relatively fixed. In this embodiment, the discharge barrel 5 can be arranged on the working surface. When the device is lifted, the discharge barrel 5 is separated from the working surface, so that the discharge barrel 5 moves with the double-layer rotary cylinder 1. A mortar hopper 501 close to the discharge port of the grinding chamber and a coarse aggregate hopper 502 close to the opening of the discharge side of the inner cylinder are arranged at the bottom of the discharge barrel 5. When the device is tilted, the mixture of fine aggregate and hardened cement paste is injected into the mortar hopper 501, and the coarse aggregate is injected into the coarse aggregate hopper 502. Under the mortar hopper 501 and the coarse aggregate hopper 502, receiving and transporting devices are respectively arranged to transport the corresponding materials. In this embodiment, a dust hopper is provided on the top of the discharge barrel 5 for connecting to the air intake duct of the air extractor and for absorbing the dust generated during the operation and dumping of the device to reduce dust pollution.

[0062] The present invention is applied to the recycling of waste concrete. The present invention separates the coarse aggregate, fine aggregate and hardened cement paste in the waste concrete, and screens the coarse aggregate and the mixture (fine aggregate and hardened cement paste) to obtain recycled aggregate with properties similar to those of natural aggregate, so that they can be effectively reused. Based on the structural characteristics of the low strength of the junction between the coarse aggregate and the cement mortar of the waste concrete, the present invention does not over-crush the concrete, but utilizes its large particle size and dead weight, and adopts the collision method of materials and materials, and materials and impact bodies to achieve the separation of the coarse aggregate itself and the mixture.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A waste concrete block separation device, comprising a double-layer rotary cylinder, the double-layer rotary cylinder comprising an inner cylinder and an outer cylinder sleeved and fixed on the inner cylinder, characterized in that: A separation chamber is formed inside the inner cylinder, which is connected to the outside of the outer cylinder through a feed side opening and a discharge side opening on the inner cylinder, and through holes are distributed on the inner cylinder for the hardened cement mortar to leak out; a detachable separation block is distributed on the inner wall of the inner cylinder, and the separation block includes a liner connected to the inner cylinder, a lifting impact body fixed on the liner and having a straight blade formed on the top, the side of the lifting impact body facing the rotation direction is a concave surface, a sliding impact body with an arc-shaped blade formed on the top is arranged on the concave surface, and a throwing impact body with an arc-shaped blade formed on the top is arranged on the other side of the lifting impact body, and the thickness of the lifting impact body, the sliding impact body and the throwing impact body gradually decreases from the root to the top; during the rotation of the double-layer rotary cylinder, the lifting impact body, the sliding impact body and the throwing impact body split and cut the concrete blocks sliding and thrown in different directions to improve the separation efficiency; the outer cylinder and the inner cylinder form a grinding chamber, the discharge port of the grinding chamber and the discharge side opening of the separation chamber are located on the same side and the positions of the two are staggered, and the grinding medium is placed in the grinding chamber.

2. The waste concrete block separation device according to claim 1, characterized in that: The diameter of the through hole is 5 mm.

3. The waste concrete block separation device according to claim 1, characterized in that: The separation blocks are distributed on the inner wall of the inner cylinder along the circumferential direction and the axial direction.

4. The waste concrete block separation device according to claim 1, characterized in that: The straight blade portion is perpendicular to the rotation direction.

5. The waste concrete block separation device according to claim 1, characterized in that: The root of the falling impact body is arranged on the outer surface of the lining plate and the other side of the lifting impact body at the same time, and the arc-shaped blade of the falling impact body extends from the side of the lifting impact body to the outer surface of the lining plate.

6. The waste concrete block separation device according to claim 1, characterized in that: The arc-shaped blades of the sliding impact body and the throwing impact body are perpendicular to the straight-line blade of the lifting impact body.

7. The waste concrete block separation device according to claim 1, characterized in that: A perforated plate is arranged on the discharge side of the outer cylinder, an opening for the inner cylinder to pass through is arranged on the perforated plate, and waist-shaped holes extending circumferentially and serving as the discharge port of the grinding chamber are distributed on the perforated plate.

8. The waste concrete block separation device according to claim 1, characterized in that: A feeding barrel is arranged on the feeding side of the double-layer rotary cylinder, and both ends of the feeding barrel are open. The discharge end of the feeding barrel is nested and engaged in the feeding port of the double-layer rotary cylinder, and the two are rotatably matched; the feeding end of the feeding barrel faces upward.

9. The waste concrete block separation device according to claim 1, characterized in that: A discharge barrel is arranged on the discharge side of the double-layer rotating cylinder, and the feed end of the discharge barrel is sleeved and engaged with the discharge end of the outer cylinder and the two are rotatably matched; a mortar hopper close to the discharge port of the grinding chamber and a coarse aggregate hopper close to the discharge side opening of the inner cylinder are arranged at the bottom of the discharge barrel.

10. The waste concrete block separation device according to claim 9, characterized in that: A dust collecting hopper connected to an air inlet pipe of an air extractor is arranged on the top of the discharge cylinder.

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