Building waste crushing and recycling device

Abstract

The invention relates to the technical field of building waste crushing, in particular to a building waste crushing and recycling device which comprises a crushing cylinder, and a crushing cavity and a grinding cavity which communicate with each other are formed in the crushing cylinder; the driving assembly comprises a hammering piece located in the smashing cavity, a reciprocating pressing rod is arranged at the top of the hammering piece, a grinding piece is arranged at the bottom of the hammering piece, a fixing column is arranged at the discharging end of the smashing cylinder, a guide column is arranged on the fixing column, a fixing piece is arranged at the bottom of the grinding piece, and a guide groove is formed in the inner wall of the fixing piece and used for guiding the grinding piece to rotate when the grinding piece ascends. The reciprocating pressing rod drives the hammering and pressing piece to descend to hammer and crush stones, the grinding piece descends to guide out the ground and crushed stones, when the reciprocating pressing rod drives the hammering and pressing piece to ascend, the uncrushed stones enter the space between the hammering and pressing piece and the inner wall of the crushing cavity, and the crushed stones enter the space between the grinding piece and the inner wall of the grinding cavity; and when the grinding piece ascends, the grinding piece is matched with the guide column and the guide groove to rotate, so that broken stones are better ground and crushed, and the crushing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of construction waste crushing, and in particular to a construction waste crushing and recycling device. Background Art

[0002] Construction waste refers to waste generated due to human or natural reasons in construction projects, mainly including waste slag, abandoned soil, silt, waste concrete blocks, broken stones, brick and tile fragments, waste mortar, mud, asphalt blocks, waste plastics, waste metals, waste bamboo and wood, etc. If construction waste is not properly handled, it will cause serious harm to the environment and resources. A large amount of construction waste is piled up in the suburbs or city corners, occupying precious land resources. At the same time, the harmful substances in construction waste may pollute the soil and groundwater through leachate, and the emission of dust and gas will also pollute the atmospheric environment.

[0003] Some of the construction waste, such as concrete, rubble, brick and tile fragments, etc., can be recycled. At present, most of the construction materials produced by waste gas are crushed and recycled using crushing equipment. The China Patent Network has published a patent application with the publication number: CN118491603B, which is called a concrete waste crushing and recycling device for construction. The crushing roller is driven to crush the construction debris, and then the motor drives the rotating grinding group to cooperate with the fixed grinding group to further crush and grind the construction debris, thereby improving the grinding efficiency.

[0004] However, the above patent still has shortcomings: the size between the rotating grinding group and the fixed grinding group is fixed, and the crushed stones after being crushed by the crushing roller cannot enter well between the rotating grinding group and the fixed grinding group, resulting in low crushing and grinding efficiency. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a construction waste crushing and recycling device, which can effectively solve the problem of low crushing and grinding efficiency of construction rubble in the prior art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a construction waste crushing and recycling device, comprising: A pulverizing cylinder, wherein a pulverizing chamber and a grinding chamber are connected to each other; A driving assembly comprises a hammer member located in a crushing chamber, a reciprocating pressure rod extending out of a crushing barrel is provided on the top of the hammer member, and a grinding member located in a grinding chamber is provided at the bottom of the hammer member, a fixed column is provided at the discharge end of the crushing barrel, and a guide column is provided on the fixed column, a fixing member is provided at the bottom of the grinding member, and a guide groove cooperating with the guide column is provided on the inner wall of the fixing member, and the guide groove is used to guide the grinding member to rotate when rising.

[0007] Furthermore, the hammer pressing piece is in the shape of an inverted cone, the crushing chamber is an inverted cone-shaped groove, and the bottom diameter of the hammer pressing piece is the same as the bottom diameter of the crushing chamber, and the top diameter of the hammer pressing piece is smaller than the top diameter of the crushing chamber.

[0008] Furthermore, the grinding piece and the grinding chamber are in a matching frustum shape, and the top diameter of the grinding piece is smaller than the bottom diameter of the hammer pressing piece, and when the grinding piece is in a high position, it fits against the inner wall of the fixed material tray.

[0009] Furthermore, the grinding piece is provided with a plurality of groups of slidably mounted auxiliary grinding pieces, and the auxiliary grinding pieces are provided with limit rings, which are used to limit the distance that the auxiliary grinding pieces extend out of the grinding piece. An auxiliary table is provided on the top of the fixed column, and a groove matching the auxiliary table is provided in the grinding piece. When the grinding piece rises to a high position, the auxiliary table is disengaged from the inner wall of the grinding piece, canceling the extrusion of the auxiliary grinding piece, and the auxiliary grinding piece retracts under the extrusion of the inner wall of the grinding chamber. When the grinding piece descends to a low position, the auxiliary table fits against the inner wall of the grinding piece, extruding the auxiliary grinding piece to make it extend to the extreme position, at which time the auxiliary grinding piece extends out of the grinding piece the longest.

[0010] Furthermore, the auxiliary grinding member is provided with an air blowing hole on a first side close to the inner wall of the grinding chamber, and the auxiliary grinding member is provided with an air inlet hole which is respectively connected with the air blowing hole and the inner cavity of the grinding member.

[0011] Furthermore, the feed end of the crushing barrel is provided with a fixed feed tray and a movable feed tray attached to the fixed feed tray, and the movable feed tray is rotatably connected to the crushing barrel, and the fixed feed tray and the movable feed tray are both provided with feed holes, and in the initial state, the feed holes on the fixed feed tray and the feed holes on the movable feed tray are staggered.

[0012] Furthermore, a pressure piece is provided at the bottom of the movable material tray, a fixed sleeve is provided at the top of the hammer pressing piece, and the fixed sleeve and the pressure piece are slidably connected, an exhaust duct is provided in the hammer pressing piece, and the exhaust duct is respectively connected to the fixed sleeve and the cavity in the grinding piece.

[0013] Furthermore, a feed hopper is provided at the top of the pulverizing cylinder, and a discharge channel is provided at the bottom of the pulverizing cylinder, and the fixing column is arranged at the bottom of the pulverizing cylinder through a bracket.

[0014] Beneficial Effects Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: 1. The reciprocating pressure rod drives the hammer pressure piece to descend to hammer and crush the stone, and at the same time, the grinding piece descends to guide the ground and crushed stone out. When the reciprocating pressure rod drives the hammer pressure piece to rise, the unbroken stone will enter between the hammer pressure piece and the inner wall of the crushing chamber, and the broken stone will enter between the grinding piece and the inner wall of the grinding chamber. When the grinding piece rises, it rotates with the guide column and the guide groove, so as to better grind and crush the broken stone and improve the crushing efficiency. Second, when the grinding piece follows the hammer pressing piece to rise and rotate, the crushed stone is crushed by the outer wall of the grinding piece and the inner wall of the grinding chamber. At the same time, the extended auxiliary grinding piece can not only prevent the crushed stone from falling too quickly, but also prevent the crushed stone from rolling between the outer wall of the grinding piece and the inner wall of the grinding chamber, so as to better assist the crushed stone grinding. After the grinding is completed, the air is blown between the grinding piece and the grinding chamber through the blowing holes on the auxiliary grinding piece, which effectively reduces the accumulation of crushed stone powder on the outer wall of the grinding piece and the inner wall of the grinding chamber, increases the capacity of crushed stone per unit time between the grinding chamber and the grinding piece, and thus improves the crushing speed and efficiency. 3. The grinding part rotates as the hammer part rises, and cooperates with the pressure part and the fixed sleeve to drive the movable material plate to rotate, thereby connecting the feed holes on the movable material plate that are offset from the fixed material plate, and introducing the crushed stone into the crushing chamber. As the grinding part descends and resets, the movable material plate rotates, so that the feed holes on the fixed material plate and the movable material plate are offset, thereby limiting the entry of crushed stone into the crushing chamber when the hammer part strikes. When the grinding part rises and rotates, the crushed stone in the crushing chamber is introduced into the grinding chamber, and the crushed stone outside is introduced into the crushing chamber, thereby realizing intermittent feeding and preventing the occurrence of excessive crushing pressure in the crushing barrel. At the same time, as the hammer part rises and falls, in cooperation with the one-way valve arranged at the outlet end of the exhaust duct, the auxiliary grinding part is blown, thereby reducing the use of energy-consuming equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional schematic diagram of the present invention; Figure 3 For the present invention Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 It is a schematic diagram of the structure of the auxiliary grinding member of the present invention; Figure 5 It is a schematic diagram of the structure explosion of the drive assembly of the present invention; Figure 6 is a cross-sectional view of a fixing member of the present invention; Figure 7 It is a schematic diagram of the state change of the driving component of the present invention in the grinding cylinder.

[0017] Figure numerals: 1. crushing cylinder; 11. crushing chamber; 12. grinding chamber; 13. fixed material tray; 14. movable material tray; 2. driving assembly; 21. reciprocating pressure rod; 22. hammer pressure piece; 2201. exhaust duct; 221. pressure piece; 222. fixed sleeve; 23. grinding piece; 231. fixing piece; 2311. guide groove; 232. auxiliary grinding piece; 2321. blowing hole; 2322. air inlet hole; 2323. limiting ring; 24. fixing column; 241. guide column; 25. auxiliary table. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0019] The present invention will be further described below in conjunction with the embodiments.

[0020] A construction waste crushing and recycling device, see attached Figure 1-7 ,include: A crushing cylinder 1, wherein a crushing chamber 11 and a grinding chamber 12 are connected to each other, a feed hopper is provided at the top of the crushing cylinder 1, and a discharge channel is provided at the bottom of the crushing cylinder 1. The crushed stones enter the crushing cylinder 1 through the feed hopper and pass through the crushing chamber 11 and the grinding chamber 12 in sequence, and are finally discharged from the discharge channel at the bottom; The driving assembly 2 includes a hammer member 22 located in the crushing chamber 11, a reciprocating rod 21 extending out of the crushing barrel 1 is provided on the top of the hammer member 22, and a grinding member 23 located in the grinding chamber 12 is provided at the bottom of the hammer member 22. The reciprocating rod 21 is used to move up and down to drive the hammer member 22. The reciprocating rod 21 and the hammer member 22 are rotatably connected. A fixed column 24 is provided at the discharge end of the crushing barrel 1. The fixed column 24 is arranged at the bottom of the crushing barrel 1 through a bracket to facilitate the discharge of crushed stones. A guide column 241 is provided on the fixed column 24. The grinding A fixing part 231 is provided at the bottom of the part 23, and a guide groove 2311 cooperating with the guide column 241 is provided on the inner wall of the fixing part 231. The guide column 241 and the fixing part 231 are each provided with two groups, which can maintain stability and better drive the grinding part 23. When the reciprocating pressure rod 21 rises, it drives the hammer pressure part 22 and the grinding part 23 to rise. At this time, the guide column 241 and the guide groove 2311 in the fixing part 231 are cooperated to guide the grinding part 23 to rotate when rising, so that the grinding part 23 and the inner wall of the grinding chamber 12 rotate relative to each other, and the stone is ground and crushed.

[0021] Specifically, the hammer pressing piece 22 is in the shape of an inverted cone, the crushing chamber 11 is an inverted cone-shaped groove, and the bottom diameter of the hammer pressing piece 22 is the same as the bottom diameter of the crushing chamber 11, and the top diameter of the hammer pressing piece 22 is smaller than the top diameter of the crushing chamber 11. When the hammer pressing piece 22 follows the reciprocating pressure rod 21 to rise, the crushed stone is introduced between the hammer pressing piece 22 and the crushing chamber 11. When the reciprocating pressure rod 21 drives the hammer pressing piece 22 to descend, the crushed stone is hammered and crushed by the hammer pressing piece 22 in cooperation with the inner wall of the crushing chamber 11. The grinding piece 23 and the grinding chamber 12 are in the shape of a matched cone, and the top diameter of the grinding piece 23 is smaller than the bottom diameter of the hammer pressing piece 22. When it is in a high position, it fits with the inner wall of the fixed material tray 13 to prevent the uncrushed gravel in the crushing chamber 11 from entering the grinding chamber 12. When the hammer piece 22 hammers and crushes the gravel, the reciprocating pressure rod 21 pushes the hammer piece 22 and the grinding piece 23 to descend, and the crushed stone in the grinding chamber 12 is discharged through the discharge channel. When the hammer piece 22 follows the reciprocating pressure rod 21 to rise and add material to the crushing chamber 11, the stone crushed by the hammer piece 22 enters between the grinding piece 23 and the inner wall of the grinding chamber 12, and as the grinding piece 23 rises, it cooperates with the guide column 241 to rotate, and then the stone is ground and crushed again.

[0022] In the above technical scheme, the reciprocating pressure rod 21 drives the hammer part 22 to descend to hammer and crush the stone, and at the same time the grinding part 23 descends to export the ground and crushed stone. When the reciprocating pressure rod 21 drives the hammer part 22 to rise, the unbroken stone will enter between the hammer part 22 and the inner wall of the crushing chamber 11, and the crushed stone will enter between the grinding part 23 and the inner wall of the grinding chamber 12, and when the grinding part 23 rises, it cooperates with the guide column 241 and the guide groove 2311 to rotate, thereby better grinding and crushing the gravel.

[0023] Among them, the grinding piece 23 is provided with a plurality of groups of auxiliary grinding pieces 232 which are slidably mounted, and the auxiliary grinding pieces 232 are provided with limiting rings 2323, which are used to limit the distance that the auxiliary grinding pieces 232 extend out of the grinding piece 23, and the auxiliary grinding pieces 232 extending out of the grinding piece 23 can assist in grinding, thereby improving the effect of gravel grinding. An auxiliary platform 25 is provided on the top of the fixed column 24, and a groove which matches the auxiliary platform 25 is provided in the grinding piece 23. When the grinding piece 23 rises to a high position, the auxiliary platform 25 is separated from the inner wall of the grinding piece 23, and the squeezing of the auxiliary grinding piece 232 is cancelled. The auxiliary grinding piece 232 retracts under the squeezing of the inner wall of the grinding chamber 12. When retracting to the limit position, some gaps are reserved between the grinding piece 23 and the inner wall of the grinding chamber 12. When the grinding piece 23 drops to a low position, the auxiliary platform 25 fits with the inner wall of the grinding piece 23, squeezing the auxiliary grinding piece 232 to make it extend to the limit position, at which time the auxiliary grinding piece 232 extends out of the grinding piece 23 the longest.

[0024] In addition, the auxiliary grinding piece 232 is provided with a blowing hole 2321 on the first side of the inner wall of the grinding chamber 12, and the distance between the blowing hole 2321 and the end of the auxiliary grinding piece 232 is greater than the minimum gap between the grinding piece 23 and the grinding chamber 12, that is, when the auxiliary grinding piece 232 is squeezed and compressed to the limit position, the blowing hole 2321 retracts into the grinding piece 23 to prevent blockage, and the auxiliary grinding piece 232 is provided with an air inlet hole 2322 which is connected with the blowing hole 2321 and the inner cavity of the grinding piece 23 respectively. By ventilating the air inlet hole 2322, when the auxiliary grinding piece 232 extends out of the grinding piece 23, the outer wall of the grinding piece 23 and the inner wall of the grinding chamber 12 are blown, thereby reducing the accumulation of crushed stone powder after crushing.

[0025] In the above technical solution, when the grinding member 23 follows the hammer member 22 to rise and rotate, the crushed stone is crushed by the outer wall of the grinding member 23 and the inner wall of the grinding chamber 12. At the same time, the extended auxiliary grinding member 232 can not only prevent the crushed stone from falling too quickly, but also prevent the crushed stone from rolling between the outer wall of the grinding member 23 and the inner wall of the grinding chamber 12, thereby better assisting the grinding of the crushed stone. After the grinding is completed, air is blown between the grinding member 23 and the grinding chamber 12 through the blowing holes 2321 on the auxiliary grinding member 232, which effectively reduces the accumulation of crushed stone powder on the outer wall of the grinding member 23 and the inner wall of the grinding chamber 12, increases the capacity of crushed stone per unit time between the grinding chamber 12 and the grinding member 23, and thus improves the crushing speed and efficiency.

[0026] It is worth mentioning that the feed end of the crushing barrel 1 is provided with a fixed feed tray 13 and a movable feed tray 14 attached to the fixed feed tray 13, and the movable feed tray 14 is rotatably connected to the crushing barrel 1, and both the fixed feed tray 13 and the movable feed tray 14 are provided with feed holes, and in the initial state, the feed holes on the fixed feed tray 13 and the feed holes on the movable feed tray 14 are staggered, at which time the passage for crushed stones to enter the crushing chamber 11 is closed to prevent the situation where too much crushed stones inside lead to high crushing pressure. Since a pressure member 221 is provided at the bottom of the movable feed tray 14, a fixed sleeve 222 is provided at the top of the hammer member 22, and the fixed sleeve 222 and the pressure member 221 are slidably connected, when the grinding member 23 rotates through the cooperation of the guide column 241 and the guide groove 2311, that is, the grinding member 23 rotates when following the hammer member 22 to rise, and rotates in the opposite direction and resets when descending, the grinding member 23 rotates to drive the hammer member 22 to rotate, and at this time, the fixed sleeve 222 Cooperate with the pressure piece 221 to drive the movable material tray 14 to rotate, and then intermittently connect the feed hole on the movable material tray 14 and the feed hole on the fixed material tray 13, so as to intermittently introduce the crushed stone into the space between the crushing chamber 11 and the hammer pressing piece 22, and reserve enough crushing space to prevent the situation that too much material in the crushing chamber 11 causes the crushing efficiency of the hammer pressing piece 22 to be reduced. An exhaust duct 2201 is provided in the hammer pressing piece 22, and the exhaust duct 2201 is respectively connected with the fixed sleeve 222 and the cavity in the grinding piece 23, and a one-way valve is provided at the exhaust end of the exhaust duct 2201. The one-way valve is used to inflate the grinding piece 23 in one direction. In the process of the hammer pressing piece 22 rising and falling, the pressure piece 221 and the fixed sleeve 222 are cooperated to inflate the cavity in the grinding piece 23, thereby assisting the blowing hole 2321 on the auxiliary grinding piece 232 to clean the crushed stone powder between the grinding chamber 12 and the grinding piece 23, thereby reducing the use of energy-consuming equipment.

[0027] In the above technical scheme, the grinding member 23 rotates as the hammer member 22 rises, and cooperates with the pressure member 221 and the fixed sleeve 222 to drive the movable material plate 14 to rotate, thereby connecting the feed hole on the movable material plate 14 that is misaligned with the fixed material plate 13, and introducing the crushed stone into the crushing chamber 11. As the grinding member 23 descends and resets, the movable material plate 14 rotates, so that the feed holes on the fixed material plate 13 and the movable material plate 14 are misaligned, so that the hammer member 22 limits the crushed stone from entering the crushing chamber 11 when hammering. When the grinding member 23 rises and rotates, the crushed stone in the crushing chamber 11 is introduced into the grinding chamber 12, and the crushed stone from the outside is introduced into the crushing chamber 11, so as to realize intermittent feeding and prevent the situation that too much crushed stone in the crushing barrel 1 causes high crushing pressure. At the same time, as the hammer member 22 rises and falls, in cooperation with the one-way valve arranged at the outlet end of the exhaust duct 2201, the auxiliary grinding member 232 is blown, thereby reducing the use of energy-consuming equipment.

[0028] Working principle: The reciprocating pressure rod 21 drives the hammer pressure piece 22 to descend to hammer and crush the stone, and at the same time, the grinding piece 23 descends to export the ground and crushed stone. When the reciprocating pressure rod 21 drives the hammer pressure piece 22 to rise, the unbroken stone will enter between the hammer pressure piece 22 and the inner wall of the crushing chamber 11, and the crushed stone will enter between the grinding piece 23 and the inner wall of the grinding chamber 12, and when the grinding piece 23 rises, it cooperates with the guide column 241 and the guide groove 2311 to rotate, so as to better grind and crush the crushed stone. When the grinding piece 23 follows the hammer pressure piece 22 to rise and rotate, the auxiliary platform 25 set on the fixed column 24 cooperates with the grinding piece 23, so that the auxiliary grinding piece 232 extended when the grinding piece 23 rotates and grinds can not only prevent the crushed stone from falling too quickly, but also prevent the crushed stone from rolling between the outer wall of the grinding piece 23 and the inner wall of the grinding chamber 12, so as to better assist the crushed stone grinding. When the grinding piece 23 follows the hammer pressure piece 22 to rise and rotate, it cooperates with the pressure piece 22 1 and the fixed sleeve 222 drive the movable material disc 14 to rotate, and then the feed hole on the movable material disc 14 that is misaligned with the fixed material disc 13 is connected, and the crushed stone is introduced into the crushing chamber 11. As the grinding member 23 descends and resets, the movable material disc 14 is rotated, so that the feed holes on the fixed material disc 13 and the movable material disc 14 are misaligned, so that the crushed stone is restricted from entering the crushing chamber 11 when the hammer pressing member 22 hammers, and intermittent feeding is achieved, and the situation of excessive crushing pressure in the crushing barrel 1 is prevented from occurring. Moreover, after the grinding is completed, as the hammer pressing member 22 rises and falls, the one-way valve arranged at the outlet end of the exhaust duct 2201 cooperates, and air is blown between the grinding member 23 and the grinding chamber 12 through the blowing hole 2321 on the auxiliary grinding member 232, which effectively reduces the accumulation of crushed stone powder on the outer wall of the grinding member 23 and the inner wall of the grinding chamber 12, and increases the capacity of crushed stone per unit time between the grinding chamber 12 and the grinding member 23, thereby improving the crushing speed and efficiency and reducing the use of energy-consuming equipment.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A construction waste crushing and recycling device, characterized in that: include: A pulverizing cylinder (1), wherein the pulverizing cylinder (1) is provided with a pulverizing chamber (11) and a grinding chamber (12) which are interconnected; A drive assembly (2), the drive assembly (2) comprising a hammer member (22) located in a pulverizing chamber (11), a reciprocating pressure rod (21) extending out of the pulverizing barrel (1) being provided at the top of the hammer member (22), and a grinding member (23) located in the grinding chamber (12) being provided at the bottom of the hammer member (22), a fixed column (24) being provided at the discharge end of the pulverizing barrel (1), and a guide column (241) being provided on the fixed column (24), a fixed member (231) being provided at the bottom of the grinding member (23), and a guide groove (2311) cooperating with the guide column (241) being provided on the inner wall of the fixed member (231), the guide groove (2311) being used to guide the grinding member (23) to rotate when ascending.

2. The construction waste crushing and recycling device according to claim 1, characterized in that: The hammer pressing piece (22) is in the shape of an inverted frustum, the pulverizing chamber (11) is an inverted frustum groove, the bottom diameter of the hammer pressing piece (22) is the same as the bottom diameter of the pulverizing chamber (11), and the top diameter of the hammer pressing piece (22) is smaller than the top diameter of the pulverizing chamber (11).

3. The construction waste crushing and recycling device according to claim 2, characterized in that: The grinding piece (23) and the grinding chamber (12) are in the shape of matched frustums, and the top diameter of the grinding piece (23) is smaller than the bottom diameter of the hammer pressing piece (22). When the grinding piece (23) is in a high position, it fits against the inner wall of the fixed material tray (13).

4. The construction waste crushing and recycling device according to claim 1, characterized in that: The grinding piece (23) is provided with a plurality of groups of auxiliary grinding pieces (232) which are slidably mounted, and the auxiliary grinding pieces (232) are provided with limiting rings (2323), the limiting rings (2323) being used to limit the distance that the auxiliary grinding pieces (232) extend out of the grinding piece (23); the top of the fixed column (24) is provided with an auxiliary table (25), and the grinding piece (23) is provided with a groove which matches the auxiliary table (25); when the grinding piece (23) rises to a high position, the auxiliary table (25) is separated from the inner wall of the grinding piece (23), the extrusion of the auxiliary grinding piece (232) is cancelled, and the auxiliary grinding piece (232) retracts under the extrusion of the inner wall of the grinding chamber (12); when the grinding piece (23) falls to a low position, the auxiliary table (25) is fitted with the inner wall of the grinding piece (23), extruding the auxiliary grinding piece (232) so that it extends to a limit position, at which time the auxiliary grinding piece (232) extends out of the grinding piece (23) to the longest extent.

5. The construction waste crushing and recycling device according to claim 4, characterized in that: The auxiliary grinding piece (232) is provided with an air blowing hole (2321) on a first side of the inner wall of the grinding chamber (12), and the auxiliary grinding piece (232) is provided with an air inlet hole (2322) which is in communication with the air blowing hole (2321) and the inner cavity of the grinding piece (23), respectively.

6. The construction waste crushing and recycling device according to claim 4, characterized in that: The feed end of the pulverizing cylinder (1) is provided with a fixed material tray (13) and a movable material tray (14) abutting against the fixed material tray (13), and the movable material tray (14) is rotatably connected to the pulverizing cylinder (1), and both the fixed material tray (13) and the movable material tray (14) are provided with feed holes, and in an initial state, the feed holes on the fixed material tray (13) and the feed holes on the movable material tray (14) are staggered.

7. The construction waste crushing and recycling device according to claim 6, characterized in that: A pressure piece (221) is provided at the bottom of the movable material tray (14), a fixing sleeve (222) is provided at the top of the hammer pressing piece (22), and the fixing sleeve (222) and the pressure piece (221) are slidably connected, an exhaust passage (2201) is provided in the hammer pressing piece (22), and the exhaust passage (2201) is communicated with the cavities in the fixing sleeve (222) and the grinding piece (23), respectively.

8. The construction waste crushing and recycling device according to claim 1, characterized in that: A feed hopper is provided at the top of the pulverizing cylinder (1), and a discharge channel is provided at the bottom of the pulverizing cylinder (1); the fixing column (24) is arranged at the bottom of the pulverizing cylinder (1) via a bracket.

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