Construction waste crushing device and method

Abstract

The application provides an engineering construction waste crushing device, which comprises a crushing box for recycling waste slag, a rotating shaft is rotatably arranged in the crushing box, a rotating cutting knife shaft is arranged at the bottom of the crushing box, a lower hopper is arranged in the crushing box, and the cutting knife shaft is located directly below the lower hopper; the rotating shaft is rotatably arranged in the lower hopper, an impact assembly for preliminarily crushing the construction waste is arranged at the top of the lower hopper, the waste is first impacted and crushed, and then the waste is stirred and crushed by the cutting knife shaft at the bottom of the crushing box, so that the waste is crushed in different ways in stages, and the waste is fully crushed; the application also provides a crushing method based on the engineering construction waste crushing device, the waste is first impacted and crushed by an impact hammer, and then the pre-crushed waste is stirred and crushed again by the rotating cutting knife shaft arranged at the bottom of the crushing box, so that the crushing efficiency is improved, a large amount of waste can be avoided from being accumulated and crushed, and the crushing effect is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering construction waste treatment, in particular to an engineering construction waste crushing device and method. BACKGROUND

[0002] Building is the general term for buildings and structures, and people create artificial environments by using the material technical means they have mastered and applying certain scientific laws and aesthetic rules to meet the needs of social life. When building buildings, waste will be generated, and these waste needs to be treated. Some construction sites treat waste by hand, which not only reduces work efficiency but also affects the health of operators. In order to change the current situation, crushing devices have been developed and innovated, so various crushing machines have appeared on construction sites.

[0003] The waste crushing device for building engineering provided in the publication "CN108772177A" includes a device body, a centrifugal fan, a control module, and a solar panel. The left end of the device body is provided with a control module, and the lower end of the device body is provided with a rack. The inside of the rack is fixed with a first support, and the upper part of the first support is symmetrically provided with a dust collection box on the left and right. The centrifugal fan is installed inside the dust collection box, and the solar panel is installed on the upper end of the device body. The present application solves the problem that a large amount of dust is generated during work, which not only threatens the health of the operator by being inhaled into the body and affects the visual response of the operator, resulting in unsatisfactory crushing effect, and when the height of the crushing device is raised, a hydraulic oil supply device is used, which causes a large amount of waste gas and other substances to pollute the atmosphere.

[0004] However, the above-mentioned device still has the following problems in the implementation process:

[0005] 1. The crushing method of the crushing device in the prior art is relatively single, and the waste is not completely crushed during crushing, which affects the efficiency of the waste. The crushed waste needs to be crushed again manually after being discharged, which consumes manpower, and a large amount of waste is crushed at the same time, so the crushing effect cannot be guaranteed.

[0006] 2. During the crushing process, the treated waste adheres to the crushing box, which increases the difficulty of subsequent manual cleaning. SUMMARY

[0007] The present application relates to the technical field of engineering construction waste treatment, in particular to an engineering construction waste crushing device and method.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0009] The utility model provides an engineering construction spoil crushing device, including the crushing box for recycling waste slag, rotatingly installed with the rotating shaft in the crushing box, the bottom of crushing box is provided with the rotating cutting knife shaft, be provided with the hopper in the crushing box, the cutting knife shaft is located the directly below hopper

[0010] The rotating shaft is installed through the hopper, the top of hopper is provided with the impact assembly for the preliminary crushing of construction waste, first impact crushing, then the cutting knife shaft at the bottom of crushing box is used to stir the waste, and the waste is crushed by different ways, so that the waste is fully crushed.

[0011] The impact assembly is connected with two groups of air bags, the bottom of air bag is provided with the air pipe through the hopper, the gas is blown to the inner wall of hopper through the air pipe by air bag extrusion impact assembly, and the waste is prevented from sticking to the hopper.

[0012] Preferably, the top of the crushing box is detachably mounted with a support frame, the top of the support frame is fixedly mounted with a motor, the motor is in transmission connection with the rotating shaft, the output shaft end of the motor is fixedly mounted with a driving synchronous pulley, the top end of the rotating shaft is fixedly mounted with a driven synchronous pulley, and the driven synchronous pulley is in transmission connection with the driving synchronous pulley.

[0013] Preferably, the impact assembly includes two groups of air cylinders, four groups of crushing cylinders and two groups of impact hammers symmetrically arranged on the top of the crushing cylinders, the top of the impact hammer is fixedly connected to the output shaft end of the air cylinder through a bridge arm, the air cylinder sucks in air to lift the impact hammer, the air cylinder discharges air, and the impact hammer falls into the crushing cylinder due to gravity to impact and crush the waste in the crushing cylinder.

[0014] Preferably, the top of the hopper is provided with a cover plate, the bottom surface of the crushing cylinder is attached to the top surface of the cover plate, and the bottom of the cover plate is symmetrically provided with a crushing receiving tray, and the two groups of crushing receiving trays are arranged on the mounting side corresponding to the air cylinder.

[0015] Preferably, a top cone is slidably arranged in the crushing receiving tray, a spring is connected in the hole of the crushing receiving tray and the top cone, a limiting plate is arranged at the top of the top cone in the crushing receiving tray, the impact crushing effect of the waste is better by the cooperation of the top cone and the impact hammer, and the top cone is lifted by the spring to avoid the waste sticking to the surface of the crushing receiving tray.

[0016] Preferably, the crushing receiving trays are connected by a connecting rod, and the connecting rod is connected with a sleeve ring, and the sleeve ring is in rotary connection with the rotating shaft.

[0017] Preferably, the surface of the rotating shaft is fixedly mounted with a fixed ring and a brush plate connected to one side of the fixed ring, and the brush end of the brush plate is attached to the inner wall of the hopper.

[0018] Preferably, the fixed ring comprises a first connecting half ring and a second connecting half ring, the brush plate is fixedly connected to one side of the second connecting half ring, and the first connecting half ring and the second connecting half ring are both provided with side plates.

[0019] Preferably, the telescopic rod end of the air cylinder is fixedly provided with a connecting plate, the connecting plate is symmetrically provided with pressure rods on both sides, the air bag top is fixedly connected with the pressure rod end, the air outlet end of the air outlet pipe is provided with a universal ball joint, and the universal ball joint is connected with an air nozzle.

[0020] A method based on the above-mentioned engineering construction waste crushing device comprises the following steps:

[0021] S1: In the initial state, the air cylinder is ventilated, the impact hammer is lifted to the outside of the crushing cylinder, the waste is thrown into the crushing cylinder below the impact hammer, the cover plate below is provided with a crushing receiving disc, the air cylinder is started, and the telescopic rod reciprocates in the crushing cylinder to lift / drop, so that the waste in the crushing cylinder is impact crushed;

[0022] S2: After a period of time, the impact hammer is lifted and separated from the crushing cylinder, the motor is started to drive the rotating shaft to rotate, the crushing cylinder after crushing is moved to the discharging hole, and the waste falls into the crushing box; the other two groups of empty crushing cylinders are rotated to the lower side of the impact hammer, the waste is thrown, and the step S1 is repeated; at the same time, the waste treated in the step S1 falls into the discharging hopper along the discharging hole in the cover plate;

[0023] S3: The cutting tool is started to continuously stir and crush the waste falling into the discharging hopper.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] 1. In the present application, the discharging hopper is provided, and the impact hammer and the crushing cylinder for pre-crushing the waste by weight are arranged on the top of the discharging hopper, the impact hammer is used for impact crushing, the pre-crushed waste is further stirred and crushed by the rotating cutting knife shaft arranged at the bottom of the crushing box, so that the crushing efficiency is improved, and a large amount of waste accumulation crushing can be avoided, and the crushing effect is further improved.

[0026] 2. In the present application, a plurality of brush plates are arranged on the surface of the rotating shaft, and the brush plate is connected with the rotating shaft by the fixed ring combined by the first connecting half ring and the second connecting half ring, so that the brush plate can rotate with the rotating shaft to clean the discharging hopper, and the brush plate is convenient to disassemble and clean.

[0027] 3. The application is characterized in that a plurality of groups of air bags are arranged outside the crushing box, the air cylinder drives the impact hammer to impact and crush the waste in the crushing cylinder, the air bag is squeezed, the air nozzle at one end of the air outlet pipe is connected through the universal ball joint, the air outlet direction of the air nozzle is adjusted according to the need, the brush plate and the rotating shaft penetrating the lower hopper are blown, and the cleaning effect is optimized. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a front view of the structure of the application.

[0029] Figure 2 It is a front view of the structure of the application.

[0030] Figure 3 It is a front view of the structure of the application.

[0031] Figure 4 It is a front view of the structure of the application.

[0032] Figure 5 It is a front view of the structure of the application. Figure 4 It is a front view of the structure of the application.

[0033] Figure 6 It is a front view of the structure of the application.

[0034] In the figure: 1, crushing box; 2, support frame; 3, motor; 4, rotating shaft; 5, air cylinder; 6, impact hammer; 7, bridge arm; 8, sealing plate; 9, crushing cylinder; 10, connecting rod; 11, collar; 12, cover plate; 13, fixed ring; 14, brush plate; 15, air bag; 16, air outlet pipe; 17, pressing rod; 18, connecting plate; 19, lower discharge hole; 20, crushing disc; 21, top cone; 22, spring; 23, limiting plate; 24, lower hopper; 25, universal ball joint; 26, first connecting half ring; 27, second connecting half ring; 28, driven synchronous pulley; 29, driving synchronous pulley. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0036] Please refer to Figures 1-6 The application provides a technical solution:

[0037] Embodiment one:

[0038] The engineering construction waste crushing device comprises a crushing box 1 for recycling waste slag, a rotating cutting knife shaft is arranged at the bottom of the crushing box 1, and a lower hopper 24 is arranged in the crushing box 1, and the cutting knife shaft is located directly below the lower hopper 24.

[0039] A group of conventional cutting knife shafts are arranged at the bottom of the lower hopper 24 in the crushing box 1, and the waste falling into the lower hopper 24 is stirred and crushed.

[0040] The rotating shaft 4 is rotatably arranged in the crushing box 1 and penetrates through the lower hopper 24, an impact assembly for preliminarily crushing the construction waste is arranged at the top of the lower hopper 24, the waste is first impact-crushed, and then is stirred and crushed by the cutting knife shaft at the bottom of the crushing box 1, so that the waste is crushed in different ways in stages, and the waste crushing is ensured to be sufficient.

[0041] In the embodiment, a group of impact assemblies are arranged, the waste is preliminarily crushed in a small amount for many times, the waste after the preliminary crushing enters the crushing box 1 through the lower hopper 24, and then is stirred and crushed by the cutting knife shaft, so that the waste crushing is more sufficient, and the consumption of manual labor is reduced.

[0042] The impact assembly comprises two groups of air cylinders 5, four groups of crushing cylinders 9 and two groups of impact hammers 6 symmetrically arranged at the top of the crushing cylinders 9, the impact hammers 6 are fixedly connected to the output shaft ends of the air cylinders 5 through the bridge arms 7 at the top, the air cylinders 5 suck the impact hammers 6, the air cylinders 5 exhaust, and the impact hammers 6 fall into the crushing cylinders 9 due to the gravity, so as to impact and crush the waste in the crushing cylinders 9.

[0043] In the embodiment, four groups of crushing cylinders 9 are arranged at the top of the lower hopper 24, and the impact hammers 6 are arranged above the two groups of crushing cylinders 9 arranged symmetrically, specifically, the impact hammers 6 are driven by the air cylinders 5 and can vertically impact in the crushing cylinders 9, so as to impact the waste in the crushing cylinders 9 and complete the preliminary crushing of the construction waste.

[0044] The top of the lower hopper 24 is provided with a cover plate 12, the cover plate 12 is symmetrically provided with a discharging hole 19, the bottom surface of the crushing cylinder 9 is attached to the top surface of the cover plate 12, and the bottom of the cover plate 12 is symmetrically provided with a crushing receiving disc 20, and the two groups of crushing receiving discs 20 are arranged on the mounting sides corresponding to the air cylinders 5.

[0045] It should be noted that the bottom surface of the cover plate 12 is provided with two groups of crushing receiving discs 20 arranged below the impact hammers 6, for supporting the waste in the crushing cylinder 9, the air cylinders 5 are started to drive the impact hammers 6 to impact in the crushing cylinder 9, after a certain time of impact crushing, the rotating shaft 4 is rotated by 90° to drive the two groups of crushing cylinders 9 to rotate by 90°, the cover plate 12 is provided with the discharging hole 19, therefore, the construction waste after the preliminary crushing is rotated and falls into the lower hopper 24 through the cover plate 12, and the preliminary crushing is completed.

[0046] The support frame 2 is detachably mounted on the top of the crushing box 1, and the motor 3 is fixedly mounted on the top of the support frame 2. The motor 3 is in transmission connection with the rotating shaft 4. The output shaft end of the motor 3 is fixedly provided with the driving synchronous pulley 29. The top end of the rotating shaft 4 is fixedly provided with the driven synchronous pulley 28. The driven synchronous pulley 28 is in transmission connection with the driving synchronous pulley 29.

[0047] It should be noted that in the embodiment, the motor 3, the driven synchronous pulley 28 and the driving synchronous pulley 29 are used to provide power for the rotation of the rotating shaft 4. The rotation of the motor 3 is set to 90° each time. The relatively arranged crushing cylinder 9 is reciprocally switched above the crushing connecting disc 20 or the opening position of the discharging hole 19 to quantitatively pre-crush the waste. In this way, the operation mode of waste crushing is increased, the crushing effect is improved, and the poor crushing effect caused by the accumulation of a large amount of waste is avoided.

[0048] When the crushing cylinder 9 moves to above the crushing connecting disc 20, the waste is fed, and then the waste is crushed by the impact hammer 6. After crushing, the waste falls above the discharging hole 19, and then falls into the crushing box 1 through the discharging hopper 24. The waste is again crushed by the rotating cutting knife shaft arranged at the bottom of the crushing box 1, so as to improve the crushing efficiency.

[0049] Embodiment two:

[0050] Based on the first embodiment, the impact hammer 6 is raised / lowered in the crushing cylinder 9 to impact and crush the construction waste. However, the surface of the crushing connecting disc 20 is smooth, and the impact and extrusion effect of the waste on the upper surface of the crushing connecting disc 20 and the lower surface of the impact hammer 6 may be poor. The waste close to the crushing connecting disc 20 is not pressed enough, and the crushing effect is poor. Therefore, the embodiment is additionally provided with an elastic top cone. The specific structure is as follows:

[0051] The top cone 21 is slidably arranged in the crushing connecting disc 20. The top cone 21 and the hole in the crushing connecting disc 20 are connected with the spring 22. The top cone 21 is located at the top of the crushing connecting disc 20 and is provided with the limiting plate 23. The top cone 21 and the impact hammer 6 cooperate to better impact and crush the waste. At the same time, the top cone 21 is pushed out by the spring 22 to avoid the waste sticking to the surface of the crushing connecting disc 20.

[0052] In the embodiment, a plurality of groups of top cones 21 are arranged in the crushing connecting disc 20. When the impact hammer 6 impacts the waste in the crushing cylinder 9, the bottom waste is subjected to the reaction force of the top cone 21, so as to avoid the waste being extruded in the bottom of the crushing cylinder 9 by the impact force;

[0053] Meanwhile, the top cone 21 is elastically connected to the mounting hole in the crushing receiving disc 20 by the spring 22, and by using the limiting plate 23, the top of the top cone 21 can always act on the waste below, and at the same time, the upward thrust generated by the spring 22 can be used to lift the impact hammer 6, thereby turning the waste at the bottom and promoting the crushing effect of the next impact on the waste.

[0054] The crushing receiving disc 20 is connected to the sleeve ring 11 through the connecting rod 10, and the sleeve ring 11 is rotationally connected to the rotating shaft 4.

[0055] It should be noted that the cover plate 12 is provided with a discharging hole 19 corresponding to the position of the crushing cylinder 9, and the crushing receiving disc 20 is arranged in the discharging hole 19, and the sleeve ring 11 and the rotating shaft 4 are rotationally connected, which does not change the supporting position of the crushing receiving disc 20, and can also support the rotating shaft 4 by using the sleeve ring 11 to ensure the rotation stability of the rotating shaft 4.

[0056] Example three:

[0057] Based on example one, the discharging hopper 24 is used as a material guiding mechanism, and the waste may be adhered to the inner wall of the discharging hopper 24, which increases the difficulty of subsequent cleaning work. Therefore, the cleaning assembly is arranged on the surface of the rotating shaft 4, which follows the rotation of the rotating shaft 4 to clean the inner wall of the discharging hopper 24. The specific structure is as follows:

[0058] The rotating shaft 4 is fixedly installed with a fixed ring 13 and a brush plate 14 connected to one side of the fixed ring 13, and the brush end of the brush plate 14 is attached to the inner wall of the discharging hopper 24.

[0059] In this embodiment, the brush plate 14 is detachably installed on the surface of the rotating shaft 4. When the rotating shaft 4 rotates, the brush plate 14 also rotates, and the brush end of the brush plate 14 is attached to the inner wall of the discharging hopper 24. Therefore, the waste adhered to the inner wall of the discharging hopper 24 can be cleaned in time, which provides convenience for subsequent cleaning.

[0060] The fixed ring 13 includes a first connecting half ring 26 and a second connecting half ring 27, and the brush plate 14 is fixedly connected to one side of the second connecting half ring 27. The outer circle of the first connecting half ring 26 and the second connecting half ring 27 is provided with a side plate, and the side plate is screw-connected with a bolt.

[0061] Furthermore, a fixing ring 13 is formed by combining the first connecting half-ring 26 and the second connecting half-ring 27. The first connecting half-ring 26 and the second connecting half-ring 27 are wrapped around the surface of the rotating shaft 4. Then, the fixing ring 13 is fastened to the surface of the brush plate 14 with bolts. If appropriate, it can be further tightened with a key strip to ensure the position and force of the brush plate 14, thereby ensuring the cleaning effect of the brush plate 14 on the inner wall of the hopper 24. At the same time, a detachable wrapping structure is set to facilitate the disassembly of the brush plate 14 and facilitate subsequent cleaning.

[0062] Example 4:

[0063] Based on Embodiment 3, after the brush plate 14 removes the waste material adhering to the inner wall of the hopper 24, waste debris will adhere to the surfaces of both the brush plate 14 and the rotating shaft 4 penetrating the hopper 24, making it impossible to clean. Therefore, this embodiment proposes the following structure:

[0064] The impact assembly is linked with two sets of airbags 15. Each airbag 15 has an air outlet pipe 16 at its bottom that extends through the hopper 24. The impact assembly compresses the airbags, blowing gas through the air outlet pipe 16 to the inner wall of the hopper 24, preventing waste material from sticking to the hopper 24. A connecting plate 18 is fixedly installed at the telescopic rod end of the cylinder 5. Pressure rods 17 are symmetrically arranged on both sides of the connecting plate 18. The top of the airbag 15 is fixedly connected to the end of the pressure rod 17. A universal ball joint 25 is provided at the air outlet end of the air outlet pipe 16, and an air nozzle is connected to the universal ball joint 25.

[0065] In this embodiment, the cylinder 5 drives the impact hammer 6 to impact and crush the waste material in the crushing cylinder 9, squeezing the air bag 15 and blowing air into the hopper 24. A connecting plate 18 is installed at the telescopic rod end of the cylinder 5, and then the connecting plate 18 is used to connect the pressure rod 17 to the movable end of the air bag 15. When the cylinder 5 is in action, the telescopic rod end rises and falls accordingly, thereby controlling the extension and retraction of the air bag 15, thereby squeezing the gas into the hopper 24, blowing air onto the brush plate 14 and the rotating shaft 4 that passes through the hopper 24, thereby achieving a cleaning effect.

[0066] It should be noted that the air nozzle at one end of the air outlet pipe 16 is connected via a universal ball joint, and the air outlet direction of the air nozzle can be adjusted as needed.

[0067] It should be noted that a one-way valve is installed inside the vent pipe 16 to ensure that the vent pipe 16 is compressed by the air bag 15 to expel gas. When the air bag 15 is stretched along with the pressure rod 17, the vent pipe 16 will not suck air or waste dust from the hopper 24 into the air bag 15.

[0068] The present invention also discloses a method based on an engineering construction waste crushing device, comprising the following discharge steps:

[0069] S1: In the initial state, the air cylinder 5 is ventilated, the impact hammer 6 is lifted to the outside above the crushing cylinder 9, the waste is thrown into the crushing cylinder 9 below the impact hammer 6, and since the crushing receiving tray 20 is arranged below the cover plate 12, the air cylinder 5 is started, and the telescopic rod reciprocates in the crushing cylinder 9 to lift / drop, impacting and crushing the waste in the crushing cylinder 9;

[0070] S2: After a period of time, the impact hammer 6 is lifted and separated from the crushing cylinder 9, the motor 3 is started to drive the rotating shaft 4 to rotate, the crushing cylinder 9 after crushing is moved to the discharging hole 19, and the waste falls into the crushing box 1; the other two groups of empty crushing cylinders 9 are rotated to the lower side of the impact hammer 6, the waste is thrown, and the step S1 is repeated; at the same time, the waste treated in the step S1 falls into the discharging hopper 24 through the discharging hole 19 in the cover plate 12;

[0071] S3: The cutting tool is started to continuously stir and crush the waste falling into the discharging hopper 24.

[0072] Working principle: In the initial state, the air cylinder 5 is ventilated, the impact hammer 6 is lifted to the outside above the crushing cylinder 9, the waste is thrown into the crushing cylinder 9 below the impact hammer 6, and since the crushing receiving tray 20 is arranged below the cover plate 12, the air cylinder 5 is started, and the telescopic rod reciprocates in the crushing cylinder 9 to lift / drop, impacting and crushing the waste in the crushing cylinder 9;

[0073] After a period of time, the impact hammer 6 is lifted and separated from the crushing cylinder 9, the motor 3 is started to drive the rotating shaft 4 to rotate, the crushing cylinder 9 after crushing is moved to the discharging hole 19, and the waste falls into the crushing box 1; the other two groups of empty crushing cylinders 9 are rotated to the lower side of the impact hammer 6, the waste is thrown, and the step S1 is repeated; at the same time, the waste treated in the step S1 falls into the discharging hopper 24 through the discharging hole 19 in the cover plate 12;

[0074] At the same time, the cutting tool is started to continuously stir and crush the waste falling into the discharging hopper 24.

[0075] During this period, since the surface of the crushing receiving tray 20 is smooth, the impact and extrusion effect of the waste on the upper surface of the crushing receiving tray 20 and the lower surface of the impact hammer 6 may not be good, the waste close to the crushing receiving tray 20 is not subjected to sufficient force, and the crushing effect is not good, so a plurality of top cones 21 are arranged in the crushing receiving tray 20, when the impact hammer 6 impacts the waste in the crushing cylinder 9, the bottom waste is subjected to the reaction force of the top cone 21, so that the waste is prevented from being extruded in the bottom of the crushing cylinder 9 by the impact force, and at the same time the impact hammer 6 is lifted, and the upward thrust is generated by the action of the spring 22, so as to turn the bottom waste, and promote the crushing treatment effect of the next impact on the waste.

[0076] When the position of the crushing cylinder 9 is switched by the rotation of the rotating shaft 4, the brush plate 14 can also act on the surface of the lower hopper 24 to clean the inner wall of the lower hopper 24;

[0077] Meanwhile, the waste in the crushing cylinder 9 is impacted and crushed by the action of the impact hammer 6 driven by the cylinder 5, the air bag 15 is squeezed, the lower hopper 24 is blown, the connecting plate 18 is installed at the end of the telescopic rod of the cylinder 5, then the connecting plate 18 is connected with the pressure rod 17 to connect with the movable end of the air bag 15, when the cylinder 5 acts, the end of the telescopic rod follows the lifting, so as to control the telescopic of the air bag 15, so as to squeeze the gas into the lower hopper 24, blow the brush plate 14 and the rotating shaft 4 penetrating in the lower hopper 24, so as to play a cleaning role.

[0078] It should be noted that the motor 3, the cylinder 5 and the cutting knife shaft arranged in the crushing box 1 are devices or equipment existing in the prior art or devices or equipment that can be realized in the prior art, and the power supply, specific composition and principle thereof are clear to those skilled in the art, so they will not be described in detail.

[0079] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An engineering construction waste crushing device, comprising a crushing box (1) for recycling waste slag, wherein a rotating cutting shaft is arranged at the bottom of the crushing box (1), and characterized in that: a lower hopper (24) is arranged in the crushing box (1), and the cutting shaft is located directly below the lower hopper (24); a rotating shaft (4) is rotatably arranged in the crushing box (1), and the rotating shaft (4) penetrates and is rotatably arranged in the lower hopper (24); an impact assembly for preliminarily crushing construction waste is arranged at the top of the lower hopper (24), so that the waste is first crushed by impact, and then is stirred and crushed by the cutting shaft at the bottom of the crushing box (1), thereby ensuring that the waste is fully crushed by different methods in stages; the impact assembly is connected with two groups of air bags (15), the bottom of the air bag (15) is provided with an air outlet pipe (16) penetrating into the lower hopper (24), and the air bag (15) is compressed by the impact assembly to blow the gas to the inner wall of the lower hopper (24) through the air outlet pipe (16), so as to prevent the waste from adhering to the inner wall of the lower hopper (24); the impact assembly comprises two groups of air cylinders (5), four groups of crushing cylinders (9), and two groups of impact hammers (6) symmetrically arranged at the top of the crushing cylinder (9), the top of the impact hammer (6) is fixedly connected to the output shaft end of the air cylinder (5) through a bridge arm (7), the impact hammer (6) is lifted by the air cylinder (5) through air inlet, the air cylinder (5) is exhausted, and the impact hammer (6) falls into the crushing cylinder (9) due to gravity, so as to impact and crush the waste in the crushing cylinder (9); the top of the lower hopper (24) is provided with a cover plate (12), the bottom surface of the crushing cylinder (9) and the top surface of the cover plate (12) are arranged in abutment, the bottom of the cover plate (12) is symmetrically provided with a crushing receiving tray (20), and the two groups of crushing receiving trays (20) are arranged on the mounting sides corresponding to the air cylinders (5); a top cone (21) is slidably arranged in the crushing receiving tray (20), the top cone (21) and the hole in the crushing receiving tray (20) are connected with a spring (22), the top of the top cone (21) in the crushing receiving tray (20) is provided with a limiting plate (23), the impact crushing effect of the waste is better by cooperation of the top cone (21) and the impact hammer (6), and meanwhile, the top cone (21) is pushed out by the spring (22), so as to avoid that the waste adheres to the surface of the crushing receiving tray (20). A support frame (2) is detachably arranged at the top of the crushing box (1), a motor (3) is fixedly arranged at the top of the support frame (2), the motor (3) is in transmission connection with the rotating shaft (4), a driving synchronous pulley (29) is fixedly arranged at the output shaft end of the motor (3), a driven synchronous pulley (28) is fixedly arranged at the top end of the rotating shaft (4), and the driven synchronous pulley (28) is in transmission connection with the driving synchronous pulley (29). The crushing receiving trays (20) are connected with a sleeve ring (11) through connecting rods (10), and the sleeve ring (11) is in rotation connection with the rotating shaft (4). ​ ​ ​ ​ 2. An engineered construction waste crushing device as claimed in claim 1, wherein: ​ 3. An engineered construction waste crushing device as claimed in claim 1, wherein: ​ 4. An engineered construction waste crushing device as claimed in claim 1, wherein: The rotating shaft (4) is fixedly installed with a fixed ring (13) and a brush plate (14) connected to one side of the fixed ring (13), and the brush end of the brush plate (14) is attached to the inner wall of the lower hopper (24).

5. An engineered construction waste crushing device as claimed in claim 4, wherein: The fixed ring (13) comprises a first connecting half ring (26) and a second connecting half ring (27), the brush plate (14) is fixedly connected to one side of the second connecting half ring (27), and the outer circle of the first connecting half ring (26) and the second connecting half ring (27) is provided with a side plate, and the side plate is screw-connected with a bolt.

6. An engineered construction waste crushing device as claimed in claim 1, wherein: The telescopic rod end of the air cylinder (5) is fixedly installed with a connecting plate (18), the connecting plate (18) is symmetrically provided with a pressing rod (17) on both sides, the air bag (15) top is fixedly connected with the pressing rod (17) end, the air outlet end of the air outlet pipe (16) is provided with a universal ball joint (25), and the universal ball joint (25) is connected with an air nozzle.

7. A method of crushing construction waste, based on the construction waste crushing device according to any one of claims 1-3, characterized in that, The steps include: S1: In the initial state, the air cylinder (5) is ventilated, the impact hammer (6) is lifted to the outside of the upper part of the crushing cylinder (9), the waste is thrown into the crushing cylinder (9) below the impact hammer (6), and the crushing disc (20) is arranged below the cover plate (12), the air cylinder (5) is started, the telescopic rod reciprocates in the crushing cylinder (9) to lift / drop, and the waste in the crushing cylinder (9) is impacted and crushed; S2: After a period of time, the impact hammer (6) is lifted and separated from the crushing cylinder (9), the motor (3) is started to drive the rotating shaft (4) to rotate, the crushing cylinder (9) after crushing is moved to the lower hole (19), the waste falls into the crushing box (1); the other two groups of empty crushing cylinders (9) are rotated to the lower part of the impact hammer (6), the material is thrown, and the step S1 is repeated; At the same time, the waste treated in step S1 falls along the lower hole (19) in the cover plate (12) into the lower hopper (24); S3: The cutting tool is started, and the waste falling into the lower hopper (24) is continuously stirred and crushed.

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