Preparation method of building solid waste regenerated sand powder concrete

Abstract

The invention provides a preparation method of building solid waste regenerated sand powder concrete, and relates to the field of building solid waste regenerated sand powder concrete.The building solid waste regenerated sand powder concrete comprises a machine shell, a feeding port is formed in the rear side of the upper portion of the machine shell, and a discharging hopper is arranged on the lower portion of the machine shell; a crushing mechanism is installed at the upper end in the machine shell, and a grid plate is fixedly installed at the position, located on the lower side of the crushing mechanism, in the machine shell. Through the arrangement of the crushing mechanism, large building solid waste materials can be crushed into small blocks, so that the large building solid waste materials are prevented from falling between the two crushing rollers, the small building solid waste materials can be quickly extruded and crushed by the crushing rollers, and the crushing efficiency of the crushing equipment is improved; the problem that in the actual using process of existing smashing equipment for building solid waste regenerated sand powder concrete, after falling between two smashing rollers in the smashing equipment, large building solid waste materials are very difficult to be rapidly squeezed and smashed by the smashing rollers, and therefore the smashing efficiency of the smashing equipment is reduced is solved.

Description

Technical Field

[0001] The invention relates to the technical field of construction solid waste recycled sand powder concrete, and in particular to a preparation method of construction solid waste recycled sand powder concrete. Background Art

[0002] With the acceleration of urbanization and the booming construction industry, a large amount of construction waste is also generated. The accumulation of construction solid waste not only occupies precious land resources, but also has serious negative impacts on the environment, such as soil pollution and dust pollution. Therefore, how to effectively treat and utilize construction solid waste materials has become an environmental and resource issue that needs to be solved urgently.

[0003] At present, when construction solid waste materials are prepared into recycled sand powder concrete, the construction solid waste materials are generally first crushed by crushing equipment, and then subsequent preparation work is carried out. However, in the actual use of the crushing equipment currently used for construction solid waste recycled sand powder concrete, large pieces of construction solid waste materials are difficult to be quickly squeezed and crushed by the crushing rods after falling between the two crushing rods inside the crushing equipment, thereby reducing the crushing efficiency of the crushing equipment. In addition, although the crushing equipment currently used for construction solid waste recycled sand powder concrete is equipped with a screen, some of the mesh holes on the screen are easily blocked by the crushed particles, thereby affecting the screening efficiency of the screen on the crushing equipment, and when cleaning the blockage in the mesh holes of the screen, it is necessary to shut down the machine and clean it manually, which brings trouble to the staff. Summary of the invention

[0004] The invention relates to a preparation method of construction solid waste recycled sand powder concrete. Through the setting of a crushing mechanism, the large pieces of construction solid waste materials can be crushed into small pieces, thereby preventing the large pieces of construction solid waste materials from falling between two crushing rods, and the small pieces of construction solid waste materials can be quickly squeezed and crushed by the crushing rods, thereby improving the crushing efficiency of the crushing equipment; through the cooperation of a linkage mechanism, an L-shaped linkage frame, a sliding cylinder, a supporting guide rod, a linkage rack and a knocking component, a detachable vibration plate, a U-shaped fixing plate and a screen bucket can be vibrated, and under the action of the vibration force, the blockages in the mesh holes of the screen bucket are forced to be disengaged, thereby avoiding affecting the screening efficiency of the screen bucket on the crushing equipment, and when cleaning the blockages in the mesh holes of the screen bucket, there is no need to stop the machine or manually clean, thereby avoiding causing trouble to the staff.

[0005] The invention provides a preparation method of construction solid waste recycled sand powder concrete, comprising the following steps: first, collecting construction solid waste materials, which include construction garbage, waste concrete and bricks; then, adding the construction solid waste materials into a crushing device, crushing the construction solid waste materials into particles with a particle size of less than 4mm by the crushing device, and obtaining solid waste sand powder; then, subjecting the obtained solid waste sand powder to alkali excitation treatment under the action of an alkali activator, and obtaining recycled sand powder; the alkali activator can be a composite solution of sodium silicate and zinc aluminum tartrate, or a composite solution of sodium hydroxide and potassium hydroxide; then, adding the recycled sand powder subjected to the alkali excitation treatment, cement, fly ash, aggregate, water reducing agent and water in a certain proportion into a mixing device for mixing and stirring, and obtaining a mixed slurry; then, pouring the mixed slurry into a mold, knocking to expel bubbles, and then standing for 2-4 days, finally demolding and curing for 8-15 days; during the curing process, a plastic film is used for film curing to avoid direct sunlight, and water is sprayed to supplement moisture when necessary, and finally the recycled sand powder concrete is obtained.

[0006] The preparation method is realized by a pulverizing device, which comprises: a casing, a feeding port is arranged at the rear side of the upper part of the casing, and a discharging hopper is arranged at the lower part of the casing; a crushing mechanism is installed at the upper end of the casing, and a grid plate is fixedly installed at the lower side of the crushing mechanism inside the casing, a guide hopper is arranged at the bottom of the grid plate inside the casing, and two crushing rods are rotatably connected inside the casing, and the two crushing rods are located below the guide hopper; a rectangular opening is opened at the lower part of the rear end surface of the casing, and a screen hopper is installed inside the rectangular opening below the two crushing rods; a driving mechanism, a linkage mechanism and an L-shaped linkage frame are arranged in sequence on the front end surface of the casing from top to bottom; two sets of knocking components are arranged inside the discharging hopper below the screen hopper;

[0007] The crushing mechanism includes a crushing movable plate, a crushing hammer head, a crushing fixed plate, a sliding rod, a driving plate, a guide sliding rod, a driving block and a strip groove. The front end surface of the crushing movable plate is fixedly connected with eight sliding rods, and the front ends of the eight sliding rods are slidably connected to the driving plate. The outside of each sliding rod is sleeved with a spring between the crushing movable plate and the driving plate, and a circular limit block is arranged at the front end of each sliding rod. The front end surface of the driving plate is fixedly connected with four guide sliding rods that pass through the front side wall of the casing, and the front ends of the four guide sliding rods are fixedly connected with two driving blocks, and the opposite surfaces of the two driving blocks are provided with a strip groove. The crushing fixed plate is fixedly installed on the upper part of the rear side surface inside the casing, and the opposite surfaces of the crushing fixed plate and the crushing movable plate are evenly provided with crushing hammer heads.

[0008] Preferably, four guide slide cylinders are fixedly connected to the upper portion of the front end surface of the housing, and the four guide slide cylinders are slidably connected to four guide slide rods respectively.

[0009] Preferably, a driving gear is fixedly installed at the left end of each of the two crushing rod rotating shafts, and the two driving gears are meshed with each other.

[0010] Preferably, the driving mechanism includes a driving motor, a driving pulley, a transmission shaft, a transmission disc, a first transmission pulley and a拨动柱 (it seems there is a mistake here, maybe it should be a specific component name, but translated as "拨动柱" for now). The driving motor is fixedly installed on the front end face of the machine housing, and two driving pulleys are fixedly installed on the rotating shaft of the driving motor; the transmission shaft is rotatably connected to the front end face of the machine housing, and a transmission disc is fixedly installed at both the left and right ends of the transmission shaft, and a拨动柱 is provided at the edge of the back surface of each of the two transmission discs; a first transmission pulley is fixedly installed outside the transmission shaft, and the first transmission pulley is connected to one of the left - hand driving pulleys through a belt for transmission.

[0011] Preferably, the linkage mechanism includes a reciprocating lead screw, a second transmission pulley, a lead screw nut, a worm and a worm gear. The reciprocating lead screw is rotatably connected to the front end face of the machine housing, and a second transmission pulley and a first bevel gear are respectively fixedly installed at the left and right ends of the reciprocating lead screw. The second transmission pulley is connected to one of the right - hand driving pulleys through a belt for transmission. A lead screw nut is connected to the outside of the reciprocating lead screw through a spiral groove, and the lead screw nut is fixedly connected to the upper end of the L - shaped linkage frame; the worm is rotatably connected to the right side face of the machine housing, and a second bevel gear meshing with the first bevel gear is fixedly installed at the front end of the worm. The worm gear is fixedly installed at the right end of the rotating shaft of the front - side crushing rod, and the worm gear is meshed with the worm.

[0012] Preferably, a sliding cylinder is fixedly connected to both the front and rear side faces of the lower part of the L - shaped linkage frame, and a support guide rod fixed to the front end of the machine housing is slidably connected inside each sliding cylinder; two linkage racks are fixedly installed on the bottom end face of the L - shaped linkage frame.

[0013] Preferably, the discharge port at the rear end of the screen bucket is distributed in a downward - inclined shape, and a U - shaped fixing plate is fixedly connected to the middle side of the bottom of the screen bucket. An L - shaped diversion plate is fixedly connected inside the U - shaped fixing plate, and a detachable vibrating plate is installed at the bottom of the U - shaped fixing plate; four vertical sliding rods are fixedly connected to the bottom of the screen bucket, and a guide block fixed inside the machine housing is slidably connected to the outside of each vertical sliding rod. A spring is sleeved on the outside of each vertical sliding rod above the guide block, and a circular limiting plate is fixedly connected to the lower end of each vertical sliding rod.

[0014] Preferably, the knocking assembly includes a lifting frame, a rotating shaft, a cam, a transmission gear, a knocking hammer head, a vertical guide rod and a support block; the bottom end surface of the lifting frame is fixedly connected with four vertical guide rods, and the lower sides of the four vertical guide rods are slidably connected with a support block fixed inside the discharging hopper, and each vertical guide rod is provided with a spring on the outside between the lifting frame and the support block, and a limiting column is provided at the lower end of each vertical guide rod, and a knocking hammer head is fixedly connected to the upper end surface of the lifting frame; the rotating shaft is rotatably connected to the discharging hopper, and the rotating shaft passes through the upper front side surface of the discharging hopper, and the front and rear ends of the rotating shaft are respectively fixedly installed with a transmission gear and a cam, and the cam is located inside the lifting frame; the transmission gears in the two groups of knocking assemblies are respectively meshed with two linkage racks.

[0015] The present invention provides a method for preparing construction solid waste recycled sand powder concrete, which has the following beneficial effects:

[0016] 1. Through the setting of the crushing mechanism, the crushing hammer head on the crushing movable plate that moves back and forth can hammer the construction solid waste materials onto the crushing hammer head on the crushing fixed plate, so that large pieces of construction solid waste materials can be crushed into small pieces, thereby preventing large pieces of construction solid waste materials from falling between the two crushing rods, and small pieces of construction solid waste materials can be quickly squeezed and crushed by the crushing rods, thereby improving the crushing efficiency of the crushing equipment.

[0017] 2. Through the coordination of the linkage mechanism, L-shaped linkage frame, sliding cylinder, supporting guide rod, linkage rack and knocking assembly, during the rotation of the reciprocating screw, the screw nut can move back and forth with the L-shaped linkage frame and the two linkage racks, and then drive the two transmission gears to rotate, thereby driving the two rotating shafts and the two cams to rotate, and then cooperate with the external spring of the vertical guide rod to make the knocking hammer head frequently knock on the bottom of the detachable vibration plate, so that the detachable vibration plate, the U-shaped fixed plate and the screen bucket vibrate. Under the action of the vibration force, the blockage in the mesh hole of the screen bucket is forced to be disengaged, avoiding affecting the screening efficiency of the screen bucket on the crushing equipment. Moreover, when cleaning the blockage in the mesh hole of the screen bucket, there is no need to stop the machine or manually clean it, thus avoiding trouble for the staff.

[0018] 3. Through the setting of the linkage mechanism, the driving motor can drive a driving pulley on the right side, the second transmission pulley and the reciprocating screw to rotate. At this time, the screw nut drives the L-shaped linkage frame and the two linkage racks to move back and forth left and right under the action of the spiral groove on the reciprocating screw. Then, the two transmission gears are driven to rotate respectively through the two moving linkage racks, thereby driving the knocking component to operate. When the knocking component is in operation, there is no need to be equipped with a separate motor drive, thereby reducing the cost and power loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0020] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] In the attached picture:

[0022] Figure 1 A schematic structural diagram of a first-viewing angle of view of a pulverizing device of the present application is shown;

[0023] Figure 2 A schematic structural diagram of a second viewing angle of the pulverizing device of the present application is shown;

[0024] Figure 3 It shows a schematic structural diagram of the pulverizing device of the present application in a disassembled state;

[0025] Figure 4 A schematic diagram of a partial cross-section of a housing and a feed port in a pulverizing device of the present application is shown;

[0026] Figure 5 The schematic diagram of the structure of the crushing roller, the driving mechanism and the linkage mechanism in the crushing device of the present application is shown;

[0027] Figure 6 The schematic diagram of the structure of the L-shaped linkage frame, the screen bucket and the knocking assembly in the crushing equipment of the present application is shown;

[0028] Figure 7 The schematic diagram of the structure after the drive shaft, the drive plate, the toggle column and the crushing mechanism in the crushing equipment of the present application are disassembled is shown;

[0029] Figure 8 A schematic diagram of the structure of the vertical sliding rod and the guide block in the crushing device of the present application after being separated is shown;

[0030] Fig. 9 A schematic diagram of the structure after the U-shaped fixing plate and the L-shaped guide plate in the pulverizing device of the present application are separated is shown;

[0031] Fig.10 A schematic diagram showing the structure of the discharge hopper and the knocking assembly in the pulverizing equipment of the present application is shown;

[0032] Fig.11 A schematic structural diagram of a striking assembly in the pulverizing device of the present application is shown.

[0033] Reference numerals list

[0034] 1. Machine housing; 101. Feed inlet; 102. Discharge hopper; 103. Guide slide; 104. Grid plate; 105. Guide hopper; 106. Crushing rod; 107. Driving gear;

[0035] 2. Driving mechanism; 201. Driving motor; 202. Driving pulley; 203. Transmission shaft; 204. Transmission plate; 205. First transmission pulley; 206. Driving column;

[0036] 3. Linkage mechanism; 301. Reciprocating screw; 302. Second transmission pulley; 303. Screw nut; 304. Worm; 305. Worm wheel;

[0037] 4. L-shaped linkage frame; 401. sliding cylinder; 402. linkage rack;

[0038] 5. Crushing mechanism; 501. Crushing moving plate; 502. Crushing hammer head; 503. Crushing fixed plate; 504. Sliding rod; 505. Driving plate; 506. Guide sliding rod; 507. Driving block; 508. Strip groove;

[0039] 6. Screen bucket; 601. U-shaped fixing plate; 602. Vertical slide bar; 603. Guide block; 604. Removable vibration plate; 605. L-shaped guide plate;

[0040] 7. knocking assembly; 701. lifting frame; 702. rotating shaft; 703. cam; 704. transmission gear; 705. knocking hammer head; 706. vertical guide rod; 707. support block. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment 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] Example 1: Please refer to Figures 1 to 11 :

[0043] The invention provides a method for preparing a construction solid waste recycled sand powder concrete, comprising the following steps: first, collecting construction solid waste materials, the construction solid waste materials including construction garbage, waste concrete and bricks; then, adding the construction solid waste materials into a crushing device, crushing the construction solid waste materials into particles with a particle size of less than 4 mm by the crushing device, and obtaining solid waste sand powder; then, subjecting the obtained solid waste sand powder to an alkali excitation treatment under the action of an alkali exciter, and obtaining recycled sand powder; the alkali exciter can be a sodium silicate and zinc aluminum tartrate composite solution, or a sodium hydroxide and potassium hydroxide composite solution, and the alkali exciter can be a sodium silicate and zinc aluminum tartrate composite solution, or a sodium hydroxide and potassium hydroxide composite solution. Sodium hydroxide and potassium hydroxide are both strong alkaline substances. The solution obtained after mixing is more alkaline. This strong alkalinity makes the solid waste sand powder more effective in alkali-activated treatment. The recycled sand powder that has been alkali-activated is then added to the mixing equipment in a certain proportion with cement, fly ash, aggregate, water reducer and water for mixing and stirring to obtain a mixed slurry. The mixed slurry is then poured into the mold, knocked to expel bubbles, and allowed to stand for 2-4 days, finally demolded and cured for 8-15 days. During the curing process, plastic film is used for covering to avoid direct sunlight, and water is sprayed to replenish moisture when necessary to finally obtain recycled sand powder concrete.

[0044] The preparation method is realized by a pulverizing device, which comprises: a casing 1, a feed port 101 is arranged at the rear side of the upper part of the casing 1, and a discharge hopper 102 is arranged at the lower part of the casing 1; a crushing mechanism 5 is installed at the upper end of the casing 1, and a grid plate 104 is fixedly installed at the lower side of the crushing mechanism 5 inside the casing 1, a guide hopper 105 is arranged at the bottom of the grid plate 104 inside the casing 1, and two crushing rods 106 are rotatably connected inside the casing 1, and the two crushing rods 106 are located below the guide hopper 105; a rectangular opening is opened at the lower part of the rear end surface of the casing 1, and a screen bucket 6 is installed inside the rectangular opening below the two crushing rods 106; a driving mechanism 2, a linkage mechanism 3 and an L-shaped linkage frame 4 are arranged on the front end surface of the casing 1 in sequence from top to bottom; two sets of knocking components 7 are arranged inside the discharge hopper 102 below the screen bucket 6, which are used to finally vibrate the screen bucket 6 to force the blockage in the mesh of the screen bucket 6 to be detached;

[0045] The crushing mechanism 5 includes a crushing movable plate 501, a crushing hammer head 502, a crushing fixed plate 503, a sliding rod 504, a driving plate 505, a guide sliding rod 506, a driving block 507 and a strip groove 508. The front end surface of the crushing movable plate 501 is fixedly connected with eight sliding rods 504, and the front ends of the eight sliding rods 504 are externally slidably connected with the driving plate 505. A spring is sleeved on the outside of each sliding rod 504 between the crushing movable plate 501 and the driving plate 505, and a circular limit block is arranged at the front end of each sliding rod 504. The front end surface of the driving plate 505 is fixedly connected with four guide sliding rods 506 that penetrate the front side wall of the casing 1. , and the front ends of the four guide slide bars 506 are fixedly connected to two driving blocks 507, and the opposite surfaces of the two driving blocks 507 are each provided with a strip groove 508, and the crushing fixed plate 503 is fixedly installed on the upper rear side surface inside the casing 1, and the crushing fixed plate 503 and the crushing movable plate 501 The opposite surfaces are evenly provided with crushing hammer heads 502; through the setting of the crushing mechanism 5, large pieces of solid construction waste materials can be crushed into small pieces, thereby preventing large pieces of solid construction waste materials from falling between the two crushing rods 106, and small pieces of solid construction waste materials can be quickly squeezed and crushed by the crushing rods 106, thereby improving the crushing efficiency of the present crushing equipment.

[0046] Four guide slide cylinders 103 are fixedly connected to the upper portion of the front end surface of the housing 1 , and the four guide slide cylinders 103 are slidably connected to four guide slide rods 506 , respectively.

[0047] A driving gear 107 is fixedly mounted on the left end of the rotating shaft of the two crushing rollers 106, and the two driving gears 107 are meshed with each other, so that the two crushing rollers 106 can rotate towards each other.

[0048] The driving mechanism 2 includes a driving motor 201, a driving pulley 202, a transmission shaft 203, a transmission disc 204, a first driving pulley 205 and a toggle column 206. The driving motor 201 is fixedly mounted on the front end face of the casing 1, and two driving pulleys 202 are fixedly mounted on the rotating shaft of the driving motor 201; the transmission shaft 203 is rotatably connected to the front end face of the casing 1, and a driving disc 204 is fixedly mounted on both ends of the transmission shaft 203, and a toggle column 206 is arranged at the opposite back edges of the two driving discs 204; a first driving pulley 205 is fixedly mounted on the outside of the transmission shaft 203, and the first driving pulley 205 is transmission-connected to a driving pulley 202 on the left side through a belt; through the setting of the driving mechanism 2, it is used to drive the crushing mechanism 5, the linkage mechanism 3 and the two crushing rods 106 to operate.

[0049] The linkage mechanism 3 includes a reciprocating lead screw 301, a second belt pulley 302, a lead screw nut 303, a worm 304 and a worm gear 305. The reciprocating lead screw 301 is rotatably connected to the front end face of the machine housing 1, and the second belt pulley 302 and a first bevel gear are respectively fixedly installed at the left and right ends of the reciprocating lead screw 301. The second belt pulley 302 is in transmission connection with a driving belt pulley 202 on the right side through a belt. The lead screw nut 303 is connected to the outside of the reciprocating lead screw 301 through a spiral groove, and the lead screw nut 303 is fixedly connected to the upper end of the L-shaped linkage frame 4. The worm 304 is rotatably connected to the right side face of the machine housing 1, and a second bevel gear meshing with the first bevel gear is fixedly installed at the front end of the worm 304. The worm gear 305 is fixedly installed at the right end of the rotating shaft of a front crushing rod 106, and the worm gear 305 meshes with the worm 304. Through the setting of the linkage mechanism 3, when driving the knocking assembly 7 to operate, it is not necessary to separately equip a motor for driving, thereby reducing costs and power consumption.

[0050] Sliding cylinders 401 are fixedly connected to the front and rear sides of the lower part of the L-shaped linkage frame 4, and a support guide rod fixed to the front end of the machine housing 1 is slidably connected inside each sliding cylinder 401. Two linkage racks 402 are fixedly installed on the bottom end face of the L-shaped linkage frame 4 for driving two transmission gears 704 to rotate.

[0051] The rear discharge port of the screen bucket 6 is distributed in a downward inclined shape, and a U-shaped fixing plate 601 is fixedly connected to the middle side of the bottom of the screen bucket 6. An L-shaped guide plate 605 is fixedly connected to the inside of the U-shaped fixing plate 601, and a detachable vibrating plate 604 is installed at the bottom of the U-shaped fixing plate 601. Four vertical sliding rods 602 are fixedly connected to the bottom of the screen bucket 6, and a guide block 603 fixed inside the machine housing 1 is slidably connected to the outside of each vertical sliding rod 602. Springs are sleeved on the outside of each vertical sliding rod 602 above the guide block 603, and a circular limiting plate is fixedly connected to the lower end of each vertical sliding rod 602. Through the setting of the screen bucket 6, it is used for screening sand powder particles.

[0052] Embodiment 2, on the basis of Embodiment 1, such as Figure 6 、 Figure 8 、 Fig.10 and Fig.11As shown, the knocking component 7 includes a lifting frame 701, a rotating shaft 702, a cam 703, a transmission gear 704, a knocking hammer head 705, a vertical guide rod 706 and a support block 707. Four vertical guide rods 706 are fixedly connected to the bottom end face of the lifting frame 701, and a support block 707 fixed inside the discharge hopper 102 is slidably connected to the lower side of the four vertical guide rods 706. A spring is sleeved on each of the four vertical guide rods 706 between the lifting frame 701 and the support block 707. A limit post is provided at the lower end of each vertical guide rod 706, and the knocking hammer head 705 is fixedly connected to the upper end face of the lifting frame 701; the rotating shaft 702 is rotatably connected to the discharge hopper 102, and the rotating shaft 702 penetrates through the front side of the upper part of the discharge hopper 102. The transmission gear 704 and the cam 703 are respectively fixedly installed at the front and rear ends of the rotating shaft 702, and the cam 703 is located inside the lifting frame 701; the transmission gears 704 in the two knocking components 7 are respectively meshed with the two linkage racks 402; through the cooperation of the linkage mechanism 3, the L-shaped linkage frame 4, the sliding cylinder 401, the support guide rod, the linkage rack 402 and the knocking component 7, the knocking hammer head 705 frequently knocks on the bottom of the detachable vibrating plate 604, so that the detachable vibrating plate 604, the C-shaped fixing plate 601 and the screen hopper 6 generate vibrations. Under the action of the vibration force, the blockages blocking the mesh holes of the screen hopper 6 are forced to be separated, so as to avoid affecting the screening efficiency of the screen hopper 6 of this crushing equipment.

[0053] The working principle of this embodiment: When using the crushing equipment, first start the driving motor 201 to drive the two driving pulleys 202 to rotate clockwise, and then drive the first transmission pulley 205, the transmission shaft 203 and the two transmission discs 204 to rotate through the left driving pulley 202, and then drive the two拨动柱 206 to rotate, so as to drive the two driving blocks 507, the four guiding slide rods 506, the driving plate 505, the four sliding rods 504, the crushing moving plate 501 and the crushing hammer heads 502 on the crushing moving plate 501 to move back and forth. Subsequently, the construction waste materials are added into the upper end inside the crushing equipment through the feeding port 101, that is, the upper end inside the casing 1. The crushing hammer heads 502 on the crushing moving plate 501 that move back and forth hammer the construction waste materials onto the crushing hammer heads 502 on the crushing fixed plate 503, so that the large construction waste materials can be broken into small pieces;

[0054] Then, the small pieces of construction solid waste materials fall into the guide hopper 105 through the grid plate 104, and are then discharged to the gaps between the upper sides of the two crushing rods 106 through the discharge port at the lower end of the guide hopper 105. At this time, a driving pulley 202 on the right side drives the second transmission pulley 302, the reciprocating screw 301, the first bevel gear, the second bevel gear, the worm 304, the worm gear 305 and the front crushing rod 106 to rotate clockwise, and then the two driving gears 107 drive the rear crushing rod 106 to rotate counterclockwise, and the two crushing rods 106 rotating in opposite directions squeeze and crush the small pieces of construction solid waste materials that fall into the gaps between the upper sides of the two crushing rods 106, and the crushed particles fall into the screen bucket 6, and the particles with a particle size greater than 4 mm are separated in the screen bucket 6 through the mesh holes of the screen bucket 6, and the particles with a particle size less than 4 mm fall into the discharge hopper 102, and are finally discharged through the discharge hopper 102.

[0055] During the rotation of the reciprocating screw 301, the screw nut 303 moves back and forth with the L-shaped linkage frame 4 and the two linkage racks 402 under the action of the spiral groove on the reciprocating screw 301, and then drives the two transmission gears 704 to rotate respectively through the two moving linkage racks 402, thereby rotating the two rotating shafts 702 and the two cams 703. When the protrusion of the cam 703 rotates to a downward state, the protrusion of the cam 703 moves the lifting frame 701 and the vertical guide rod 706 downward in a straight line. At this time, the external spring of the vertical guide rod 706 is in a compressed state, and then When the protrusion of the cam 703 rotates to an upward state, the lifting frame 701 loses its downward pushing effect. At this time, the lifting frame 701 moves upward rapidly with the lifting frame 701 and the knocking hammer 705 under the action of the external spring force of the vertical guide rod 706, so that the knocking hammer 705 knocks on the bottom of the detachable vibration plate 604, thereby causing the detachable vibration plate 604, the U-shaped fixing plate 601 and the screen bucket 6 to vibrate. Under the action of the vibration force, the blockage in the mesh of the screen bucket 6 is forced to be disengaged, thereby avoiding affecting the screening efficiency of the screen bucket 6 on the crushing equipment.

Claims

1. A method for preparing recycled sand powder concrete from construction solid waste, characterized in that: The following steps are involved: 1) First, collect construction solid waste materials, including construction waste, waste concrete and bricks; 2) Then, the construction solid waste material is added into a crushing device, and the construction solid waste material is crushed into particles with a particle size of less than 4 mm by the crushing device to obtain solid waste sand powder; 3) Then, the obtained solid waste sand powder is subjected to alkali excitation treatment under the action of an alkali activator to obtain regenerated sand powder; the alkali activator can be a composite solution of sodium silicate and zinc aluminum tartrate, or a composite solution of sodium hydroxide and potassium hydroxide; 4) Add the regenerated sand powder treated with alkali, cement, fly ash, aggregate, water reducer and water into a mixing device in a certain proportion and mix and stir to obtain a mixed slurry; 5) Then pour the mixed slurry into the mold, knock it to remove the bubbles, let it stand for 2-4 days, and finally demold and cure for 8-15 days; use plastic film to cover it during the curing process to avoid direct sunlight, and spray water to replenish moisture when necessary, and finally obtain recycled sand powder concrete.

2. The method for preparing construction solid waste recycled sand powder concrete according to claim 1, characterized in that: The preparation method is implemented by a pulverizing device, the pulverizing device comprising: a housing (1), a feed inlet (101) being arranged at the rear side of the upper portion of the housing (1), and a discharge hopper (102) being arranged at the lower portion of the housing (1); the housing (1) being characterized in that a crushing mechanism (5) is installed at the upper end thereof, a grid plate (104) is fixedly installed at the lower side of the crushing mechanism (5) inside the housing (1), a guide hopper (105) is arranged at the bottom of the grid plate (104) inside the housing (1), and the housing (1) ) are rotatably connected to two crushing rods (106) inside, and the two crushing rods (106) are located below the guide hopper (105); a rectangular opening is opened at the lower part of the rear end surface of the casing (1), and a screen bucket (6) is installed inside the rectangular opening below the two crushing rods (106); a driving mechanism (2), a linkage mechanism (3) and an L-shaped linkage frame (4) are arranged in sequence from top to bottom on the front end surface of the casing (1); two sets of knocking components (7) are arranged inside the discharge hopper (102) below the screen bucket (6).

3. The method for preparing construction solid waste recycled sand powder concrete according to claim 2, characterized in that: The crushing mechanism (5) comprises a crushing movable plate (501), a crushing hammer head (502), a crushing fixed plate (503), a sliding rod (504), a driving plate (505), a guide sliding rod (506), a driving block (507) and a strip groove (508). The front end surface of the crushing movable plate (501) is fixedly connected with eight sliding rods (504), and the front ends of the eight sliding rods (504) are externally slidably connected with the driving plate (505). A spring is sleeved on the outside of each sliding rod (504) between the crushing movable plate (501) and the driving plate (505), and each sliding rod (504) is provided with a spring. A circular stop block is provided at the front end of the sliding rod (504); the front end surface of the driving plate (505) is fixedly connected to four guide sliding rods (506) penetrating the front side wall of the casing (1); and the front ends of the four guide sliding rods (506) are fixedly connected to two driving blocks (507); the opposite surfaces of the two driving blocks (507) are each provided with a strip-shaped groove (508); the crushing fixed plate (503) is fixedly installed at the upper part of the rear side surface inside the casing (1); and the opposite surfaces of the crushing fixed plate (503) and the crushing movable plate (501) are evenly provided with crushing hammer heads (502).

4. The method for preparing construction solid waste recycled sand powder concrete according to claim 3, characterized in that: Four guide slide cylinders (103) are fixedly connected to the upper portion of the front end surface of the housing (1), and the four guide slide cylinders (103) are respectively slidably connected to four guide slide bars (506); a driving gear (107) is fixedly installed at the left end of the rotating shaft of the two crushing rollers (106), and the two driving gears (107) are meshed with each other.

5. The method for preparing construction solid waste recycled sand powder concrete according to claim 4, characterized in that: The driving mechanism (2) comprises a driving motor (201), a driving pulley (202), a transmission shaft (203), a transmission disc (204), a first driving pulley (205) and a toggle post (206); the driving motor (201) is fixedly mounted on the front end face of the housing (1), and two driving pulleys (202) are fixedly mounted on the rotating shaft of the driving motor (201); the transmission shaft (203) is rotatably connected to the front end face of the housing (1), and a driving disc (204) is fixedly mounted on both left and right ends of the transmission shaft (203), and a toggle post (206) is arranged at the opposite edges of the two driving discs (204); a first driving pulley (205) is fixedly mounted on the outside of the transmission shaft (203), and the first driving pulley (205) is transmission-connected to a left driving pulley (202) via a belt.

6. The method for preparing construction solid waste recycled sand powder concrete according to claim 5, characterized in that: The linkage mechanism (3) includes a reciprocating lead screw (301), a second belt pulley (302), a lead screw nut (303), a worm (304) and a worm gear (305). The reciprocating lead screw (301) is rotatably connected to the front end face of the machine housing (1), and the second belt pulley (302) and a first bevel gear are respectively fixedly installed at the left and right ends of the reciprocating lead screw (301). The second belt pulley (302) is drivingly connected to one of the right-side drive belt pulleys (202) through a belt. The outer part of the reciprocating lead screw (301) is connected to the lead screw nut (303) through a spiral groove, and the lead screw nut (303) is fixedly connected to the upper end of the L-shaped linkage frame (4). The worm (304) is rotatably connected to the right side face of the machine housing (1), and a second bevel gear meshing with the first bevel gear is fixedly installed at the front end of the worm (304). The worm gear (305) is fixedly installed at the right end of the rotating shaft of the front crushing rod (106), and the worm gear (305) meshes with the worm (304).

7. The method for preparing construction solid waste recycled sand powder concrete according to claim 6, characterized in that: On the front and rear sides of the lower part of the L-shaped linkage frame (4), a sliding cylinder (401) is fixedly connected, and a support guide rod fixed to the front end of the machine housing (1) is slidably connected inside each sliding cylinder (401). Two linkage racks (402) are fixedly installed on the bottom end face of the L-shaped linkage frame (4).

8. The method for preparing construction solid waste recycled sand powder concrete according to claim 7, characterized in that: The rear discharge port of the screen bucket (6) is distributed in a downward inclined shape, and a U-shaped fixing plate (601) is fixedly connected to the middle side of the bottom of the screen bucket (6). An L-shaped guide plate (605) is fixedly connected to the inner side of the U-shaped fixing plate (601), and a detachable vibrating plate (604) is installed at the bottom of the U-shaped fixing plate (601). Four vertical sliding rods (602) are fixedly connected to the bottom of the screen bucket (6), and a guide block (603) fixed inside the machine housing (1) is slidably connected to the outside of each vertical sliding rod (602). A spring is sleeved on the outside of each vertical sliding rod (602) above the guide block (603), and a circular limiting plate is fixedly connected to the lower end of each vertical sliding rod (602).

9. The method for preparing construction solid waste recycled sand powder concrete according to claim 8, characterized in that: The knocking assembly (7) comprises a lifting frame (701), a rotating shaft (702), a cam (703), a transmission gear (704), a knocking hammer head (705), a vertical guide rod (706) and a support block (707). The bottom end surface of the lifting frame (701) is fixedly connected with four vertical guide rods (706), and the lower side of the four vertical guide rods (706) is slidably connected with a support block (707) fixed inside the discharge hopper (102). The outer side of each vertical guide rod (706) is provided with a spring between the lifting frame (701) and the support block (707). A limiting column is arranged at the lower end of each vertical guide rod (706); a striking hammer head (705) is fixedly connected to the upper end surface of the lifting frame (701); the rotating shaft (702) is rotatably connected to the discharge hopper (102), and the rotating shaft (702) passes through the upper front side surface of the discharge hopper (102); a transmission gear (704) and a cam (703) are fixedly installed at the front and rear ends of the rotating shaft (702), and the cam (703) is located inside the lifting frame (701); the transmission gears (704) in the two groups of the striking assemblies (7) are respectively meshed with two linkage racks (402).

Images