Construction method for resource utilization of construction waste by multi-stage crushing, screening and vibration pressing

Abstract

The application relates to the technical field of construction waste, and discloses a construction method for resource utilization of construction waste through multi-stage crushing, screening and vibration pressing brick making, which comprises the following construction steps: 1) construction waste is transmitted to a jaw crusher for crushing to form primary coarse material; 2) the primary coarse material is transmitted to a cone crusher for crushing to form secondary coarse material; 3) the secondary coarse material is subjected to initial screening through a single-layer vibrating screen to form initial screening material; 4) the initial screening material is conveyed to a multi-layer vibrating screen for screening to form powder material; 5) the powder material is mixed with cement and water for metering, mixing and stirring to form mixed material; 6) the mixed material is conveyed to a mold of a table mold vibration press, and the mixed material in the mold is subjected to vibration pressing to form a green brick; and 7) the green brick is separated from the mold, and is maintained for a set time to form a finished brick. The construction method has the advantages of green environmental protection, waste-to-resource, good brick quality, efficient construction waste treatment and the like.

Description

Technical Field

[0001] This invention patent relates to the technical field of construction waste, specifically to a construction method for the resource utilization of construction waste through multi-stage crushing, screening, and vibratory pressing of bricks. Background Technology

[0002] In the current technology, landfill is still the main method for treating construction waste. However, the capacity of construction waste disposal sites is limited and there is a lack of corresponding utilization measures, making it difficult to effectively treat construction waste. Summary of the Invention

[0003] The purpose of this invention is to provide a construction method for the resource utilization of construction waste through multi-stage crushing, screening, and vibratory pressing of bricks, aiming to solve the problem of the difficulty in effectively treating construction waste in the existing technology.

[0004] This invention is implemented as follows: a construction method for the resource utilization of construction waste through multi-stage crushing, screening, and vibratory pressing, comprising the following construction steps:

[0005] 1) Place the construction waste in a vibrating feeder and transfer the construction waste in the vibrating feeder to a jaw crusher for crushing to form primary coarse material;

[0006] 2) The primary coarse material is transferred to a cone crusher for crushing to form secondary coarse material;

[0007] 3) The secondary coarse material is first screened through a single-layer vibrating screen to form the primary screened material;

[0008] 4) The initial screened material is conveyed to a multi-layer vibrating screen for sieving from top to bottom to form powder;

[0009] 5) The powder, cement, and water are metered and mixed to form a mixture;

[0010] 6) The mixture is conveyed to the mold of the table mold vibratory press, and the mixture placed in the mold is vibrated and pressed to form a brick blank;

[0011] 7) Remove the brick blank from the mold, cure it for a set time, and form a finished brick.

[0012] Furthermore, the jaw crusher has a primary crushing chamber, in which a fixed jaw plate arranged at an incline and a movable jaw plate arranged movably are provided, with the movable jaw plate and the fixed jaw plate arranged at intervals facing each other.

[0013] The fixed jaw plate has an inclined fixed surface, and the movable jaw plate has a movable surface facing the fixed jaw plate. There is a primary crushing interval for placing construction waste between the fixed surface and the movable surface. Along the primary crushing interval from bottom to top, the fixed surface and the movable surface are inclined away from each other.

[0014] The upper part of the movable jaw plate is eccentrically connected to the drive rotor, and the lower part of the movable jaw plate is connected to an elastic structure. The elastic structure drives the lower part of the movable jaw plate to swing and reset towards the fixed jaw plate.

[0015] In construction step 1), when the drive rotor rotates, the movable jaw plate moves up and down reciprocally, and the movable surface moves up and down relative to the fixed surface. The fixed surface and the movable surface perform primary crushing on the construction waste placed in the primary crushing interval to form primary coarse material, which falls from the bottom of the primary crushing interval.

[0016] Furthermore, a primary conveyor belt is provided between the jaw crusher and the cone crusher, and an iron remover is provided above the primary conveyor belt; in construction step 1), the primary coarse material falls from the bottom of the primary crushing interval and lands on the primary conveyor belt, which then transports the primary coarse material to the cone crusher; the iron remover magnetically adsorbs iron impurities in the primary coarse material on the primary conveyor belt.

[0017] Furthermore, the cone crusher has a secondary crushing chamber, the outer periphery of the middle part of the secondary crushing chamber has a fixed crushing wall, the secondary crushing chamber is provided with an eccentrically rotating cone head, and the outer periphery of the rotating cone head is provided with a rotating crushing wall;

[0018] Along the secondary crushing chamber from bottom to top, the fixed crushing wall and the rotating crushing wall are respectively arranged inwardly at an inward angle, and a secondary crushing interval is formed between the fixed crushing wall and the rotating crushing wall. The secondary crushing interval is arranged around the outer periphery of the rotating cone. The middle part of the fixed crushing wall protrudes towards the rotating crushing wall, forming a pointed bent protrusion. The bent protrusion is arranged around the outer periphery of the rotating cone.

[0019] In construction step 2), the primary coarse material falls from top to bottom into the secondary crushing chamber. The rotating cone rotates eccentrically. During the process of passing through the secondary crushing interval, the primary coarse material is crushed by the compression of the fixed crushing wall and the rotating crushing wall to form secondary coarse material, which falls from the bottom of the secondary crushing chamber.

[0020] Furthermore, the single-layer vibrating screen includes a single primary vibrating screen arranged inclined from bottom to top, the primary vibrating screen having primary screen holes; in construction step 3), the primary vibrating screen is driven from bottom to top, after the secondary coarse material falls onto the primary vibrating screen, as the primary vibrating screen is driven from bottom to top, the secondary coarse material with a diameter smaller than the primary screen holes falls through the primary screen holes to form the primary screen material;

[0021] The top of the primary vibrating screen is connected to the cone crusher via a return conveyor belt. The secondary coarse material that does not pass through the primary screen holes moves upward with the primary vibrating screen and falls onto the return conveyor belt, which then transports it back to the cone crusher.

[0022] Furthermore, the multi-layer vibrating screen includes multiple secondary vibrating screens arranged sequentially in a vertical manner, with the secondary vibrating screens inclined upwards along the direction from bottom to top; each secondary vibrating screen is provided with multiple secondary screen holes, with the secondary screen holes of the multiple secondary vibrating screens gradually decreasing in size along the direction from top to bottom.

[0023] In construction step 4), the primary screen material falls from top to bottom onto the multi-layer vibrating screen. The primary screen material passes through the vibration screening of multiple secondary vibrating screens in sequence, passes through the secondary screen holes, and falls from the bottom of the multi-layer vibrating screen to form the powder.

[0024] Furthermore, in construction step 5), the measured powder and cement are placed in a mixer. After the powder and cement are mixed and stirred in the mixer for a set time, a measured amount of water is injected into the mixer. The water is then mixed and stirred with the mixed powder and cement for a set time to form the mixture.

[0025] Furthermore, the table mold vibratory press is equipped with a vibrating table, a support plate on the vibrating table, and the mold placed on the support plate. The mold has multiple mold cavities arranged in an array. The mold is equipped with a pressure head, and the pressure head has multiple corresponding lower pressure plates inserted into the mold cavities.

[0026] In construction step 6), during the process of placing the mixture into multiple mold cavities, the vibrating table drives the mold to vibrate up and down and horizontally, and performs preliminary vibration and compression on the mixture placed in the mold cavity;

[0027] In construction step 6), the pressure head moves toward the mold until multiple lower pressure plates press down on the mixture in the mold cavity from top to bottom. The lower pressure plates apply downward static pressure to the mixture. The vibration table drives the mold to vibrate up and down, and performs secondary vibration and pressure on the mixture in the mold cavity so that the mixture in the mold cavity forms a brick blank.

[0028] Furthermore, in construction step 7), after the brick blank has been formed in the mold cavity for a set time, the mold and the pressure head move upward away from the support plate, and the upward movement speed of the pressure head is lower than the upward movement speed of the mold. Multiple lower pressure plates detach the brick blank from the mold cavity, and the support plate carries multiple brick blanks to a set position for curing.

[0029] Furthermore, the vibration table is provided with a placement position for placing the tray, and the interior of the placement position is provided with a lower air chamber, which is connected to the air filling and suction device; the placement position is provided with multiple lower air holes, which are distributed throughout the placement position; a sealing ring is provided on the outer periphery of the placement position.

[0030] The pallet has multiple upper air chambers, and the bottom of the pallet has multiple vent holes, which are respectively connected to the multiple upper air chambers. The pallet has multiple brick support positions corresponding to the mold cavity, and the multiple brick support positions are respectively arranged vertically aligned with the multiple upper air chambers. The brick support positions have multiple upper air holes, which are connected to the upper air chambers.

[0031] In construction step 6), the pallet is placed on the placement position, and the bottom of the pallet abuts against the sealing ring to seal the outer periphery of the lower air chamber. The lower air chamber is connected to multiple upper air chambers through multiple vent holes.

[0032] In construction step 6), when the mixture is placed in the mold cavity, the upper air chamber is kept at normal pressure. When the lower pressure plate is inserted into the mold cavity and presses the mixture in the mold cavity downward, and the vibrating table drives the mold to vibrate up and down, the air filling and suction device injects high-pressure gas into the lower air chamber. The high-pressure gas presses the mixture from bottom to top through the upper air hole.

[0033] In construction step 7), during the process of the lower pressure plate removing the brick blank from the mold cavity, the air filling and suction device fills the lower air chamber with gas so that the upper air chamber forms a negative pressure state.

[0034] Compared with existing technologies, the construction waste multi-stage crushing, screening, and vibratory pressing brick recycling method provided by this invention has the following beneficial effects:

[0035] 1) Green and environmentally friendly: Using construction waste as the main raw material, it is crushed and mixed with cement and water to make non-fired finished bricks. The production process is green and pollution-free, which improves the comprehensive utilization rate of construction waste, solves the problem of "overload" of construction waste and pollution of the ecological environment, and promotes the sustainable development of the construction industry.

[0036] 2) Turning waste into treasure: Construction waste is crushed and screened into reusable powder. The powder is mixed with an appropriate amount of cement and water to form a mixture. The mixture is then pressed by a table mold vibrating press to form finished bricks, realizing the reuse and resource utilization of construction waste.

[0037] 3) High quality of finished bricks: The mixture is vibrated and pressed by a table mold vibratory press, which makes the mixture quick, uniform, compact and dense, forming finished bricks with a certain strength.

[0038] 4) High efficiency in construction waste treatment: Through modular design, various mechanical structures are organically combined, which is highly flexible and occupies less space on the overall working surface, forming a highly automated construction waste treatment platform, which significantly improves the efficiency of construction waste treatment. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the construction method for the resource utilization of construction waste through multi-stage crushing, screening, and vibratory pressing of bricks provided by the present invention.

[0040] Figure 2 This is a partial schematic diagram of the jaw crusher provided by the present invention;

[0041] Figure 3 This is a partial schematic diagram of the cone crusher provided by the present invention;

[0042] Figure 4 This is a front view schematic diagram of the table mold vibratory press provided by the present invention;

[0043] Figure 5 This is a front view schematic diagram of the separation of the pressure head and the mold provided by the present invention;

[0044] Figure 6 This is a front view schematic diagram of the cooperation between the pressure head and the mold provided by the present invention;

[0045] Figure 7 This is a cross-sectional schematic diagram of the vibration table and the support plate provided by the present invention. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0047] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0048] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0049] Reference Figure 1-7 The image shown is a preferred embodiment of the present invention.

[0050] The construction method for the resource utilization of construction waste through multi-stage crushing, screening, and vibratory pressing of bricks includes the following construction steps:

[0051] 1) Place the construction waste 103 in the vibrating feeder and transfer the construction waste 103 in the vibrating feeder to the jaw crusher for crushing to form primary coarse material 106;

[0052] 2) The primary coarse material 106 is transferred to the cone crusher 201 for crushing to form secondary coarse material 206;

[0053] 3) The secondary coarse material 206 is first screened through a single-layer vibrating screen to form the primary screened material;

[0054] 4) The initial screening material is conveyed to a multi-layer vibrating screen for screening from top to bottom to form powder;

[0055] 5) Measure and mix the powder, cement, and water to form a mixture 306;

[0056] 6) The mixture 306 is conveyed to the mold 301 of the table mold vibratory press, and the mixture 306 placed in the mold 301 is vibrated and pressed to form a brick blank;

[0057] 7) Remove the brick blank from mold 301, cure it for a set time, and form the finished brick.

[0058] The above-mentioned construction waste multi-stage crushing, screening, and vibratory pressing brick recycling method has the following beneficial effects:

[0059] 1) Green and environmentally friendly: Using construction waste 103 as the main raw material, after crushing, it is mixed with cement and water to make non-fired finished bricks. The production process is green and pollution-free, which improves the comprehensive utilization rate of construction waste 103, solves the problem of "overloading" of construction waste 103 and polluting the ecological environment, and promotes the sustainable development of the construction industry.

[0060] 2) Turning waste into treasure: Construction waste 103 is crushed and screened into reusable powder. The powder is mixed with an appropriate amount of cement and water to form a mixture 306. The mixture 306 is then pressed by a table mold vibrating press to form finished bricks, realizing the reuse and resource utilization of construction waste 103.

[0061] 3) High quality of finished bricks: The mixture 306 is vibrated and pressed by a table mold vibratory press, which makes the mixture 306 fast, uniform, compact and dense, forming finished bricks with a certain strength.

[0062] 4) High efficiency in construction waste 103 processing: Through modular design, various mechanical structures are organically combined, which is highly flexible and occupies less space on the overall working surface, forming a highly automated construction waste 103 processing platform, which significantly improves the processing efficiency of construction waste 103.

[0063] This construction waste multi-stage crushing, screening, and vibratory pressing method for resource utilization of bricks is applicable to the recycling and processing of construction waste 103, and is also suitable for the production of finished bricks of various types and shapes. The finished bricks are mainly suitable for traditional paving materials, road paving, roadbed paving, park greening road paving, urban river stabilization and slope protection, and urban underground pipeline construction.

[0064] In this embodiment, the jaw crusher has a primary crushing chamber 100, in which a fixed jaw plate 102 is arranged at an incline and a movable jaw plate 104 is arranged movably, with the movable jaw plate 104 and the fixed jaw plate 102 arranged facing each other at intervals.

[0065] The fixed jaw plate 102 has an inclined fixed surface 1021, and the movable jaw plate 104 has a movable surface 1041 facing the fixed jaw plate. There is a primary crushing interval for placing construction waste 103 between the fixed surface 1021 and the movable surface 1041. Along the primary crushing interval from bottom to top, the fixed surface 1021 and the movable surface 1041 are inclined away from each other.

[0066] The upper part of the movable jaw plate 104 is eccentrically connected to the drive rotor 101, and the lower part of the movable jaw plate 104 is connected to an elastic structure 105. The elastic structure 105 drives the lower part of the movable jaw plate 104 to swing and reset towards the fixed jaw plate 102.

[0067] In construction step 1), when the drive rotor 101 rotates, the movable jaw plate 104 moves up and down reciprocally, and the movable surface 1041 moves up and down reciprocally relative to the fixed surface 1021. The fixed surface 1021 and the movable surface 1041 perform primary crushing on the construction waste 103 placed in the primary crushing compartment to form primary coarse material 106, which falls from the bottom of the primary crushing compartment.

[0068] The jaw crusher can be the MCP-106J jaw crusher, with a total power of 136kw, a feeding capacity of 450t / h, and a maximum feed size of 560mm. The jaw crusher can crush hard objects with a compressive strength of up to 320Mpa.

[0069] During the crushing process, the movable jaw plate 104 makes periodic reciprocating motions against the fixed jaw plate 102. When the movable jaw plate 104 approaches the fixed jaw plate 102, the construction waste 103 is crushed by compression, splitting, and impact between the two jaw plates. When it moves away, the crushed primary coarse material 106 falls and is discharged due to gravity.

[0070] In this embodiment, construction waste 103 is solid waste, which is relatively large in size and weight. It needs to be put into the storage bin of the vibrating feeder by a loader to wait for feeding. The vibrating feeder is responsible for feeding the construction waste 103 from the storage bin evenly, regularly and continuously into the jaw crusher to prevent the jaw crusher from freezing due to uneven feeding.

[0071] The construction waste 103 is initially crushed using a jaw crusher. Before placing the construction waste 103 into the jaw crusher, the jaw crusher is turned on and started under no-load conditions. Only after the jaw crusher is running normally can the construction waste 103 be fed in. During the process of feeding the construction waste 103, side feeding should be avoided to prevent sudden changes in load or sudden increases on one side.

[0072] A primary conveyor belt is provided between the jaw crusher and the cone crusher 201, and an iron remover is provided above the primary conveyor belt; in construction step 1), the primary coarse material 106 falls from the bottom of the primary crushing interval and lands on the primary conveyor belt, which then transports the primary coarse material 106 to the cone crusher 201; the iron remover magnetically adsorbs iron impurities in the primary coarse material 106 on the primary conveyor belt.

[0073] The iron remover is specifically designed to adsorb impurities such as waste steel bars and waste iron wires remaining in the primary coarse material 106 after crushing, ensuring the quality of the primary coarse material 106.

[0074] In this embodiment, the cone crusher 201 has a secondary crushing chamber. The outer periphery of the middle part of the secondary crushing chamber has a fixed crushing wall 2011. The secondary crushing chamber is provided with an eccentrically rotating rotating cone head 202. The outer periphery of the rotating cone head 202 is provided with a rotating crushing wall 2021.

[0075] Along the secondary crushing chamber from bottom to top, the fixed crushing wall 2011 and the rotating crushing wall 2021 are respectively arranged inwardly at an inward angle. A secondary crushing interval 200 is formed between the fixed crushing wall 2011 and the rotating crushing wall. The secondary crushing interval 200 is arranged around the outer periphery of the rotating cone head 202. The middle part of the fixed crushing wall 2011 protrudes towards the rotating crushing wall, forming a pointed bent protrusion. The bent protrusion is arranged around the outer periphery of the rotating cone head 202.

[0076] In construction step 2), the primary coarse material 106 falls from top to bottom into the secondary crushing chamber. The rotating cone head 202 rotates eccentrically. During the process of passing through the secondary crushing interval 200, the primary coarse material 106 is crushed by the compression of the fixed crushing wall 2011 and the rotating crushing wall to form the secondary coarse material 206. The secondary coarse material 206 falls from the bottom of the secondary crushing chamber.

[0077] The cone crusher 201 can be the MPC-300CS cone crusher 201, with a total power of 313kw, a processing capacity of 350t / h, and a maximum feed particle size of 210mm.

[0078] During the crushing of primary coarse material 106, the cone crusher 201 rotates eccentrically with the rotating cone head 202. The primary coarse material 106 is subjected to multiple compressions and impacts from the fixed crushing wall 2011 and the rotating crushing wall in the secondary crushing interval 200. The secondary coarse material 206 formed after crushing falls and is discharged under its own gravity.

[0079] Before the primary coarse material 106 enters the cone crusher 201, the cone crusher 201 is pre-started under no-load. Only after confirming that the cone crusher 201 is operating normally can it begin operation. During the process of the primary coarse material 106 entering the cone crusher 201, a uniform feed rate should be maintained to prevent the primary coarse material 106 from accumulating, which would increase the load on the motor, causing excessive starting current and potentially burning out the motor.

[0080] In this embodiment, the single-layer vibrating screen includes a single primary vibrating screen arranged at an angle from bottom to top, and the primary vibrating screen has primary screen holes; in construction step 3), the primary vibrating screen is driven from bottom to top, and after the secondary coarse material 206 falls on the primary vibrating screen, as the primary vibrating screen is driven from bottom to top, the secondary coarse material 206 with a diameter smaller than the primary screen holes falls through the primary screen holes to form primary screen material.

[0081] The top of the primary vibrating screen is connected to the cone crusher 201 via a return conveyor belt. The secondary coarse material 206 that does not pass through the primary screen holes moves upward with the primary vibrating screen and falls onto the return conveyor belt, which then transports it back to the cone crusher 201.

[0082] Secondary coarse material 206 that does not meet the particle size requirements is blocked on the surface of the primary vibrating screen. Due to the vibration, the secondary coarse material 206 can be conveyed along the inclined primary vibrating screen to the return conveyor belt, and then transported to the cone crusher 201 for further crushing. The secondary coarse material 206 that meets the particle size requirements falls through the primary screen holes to form the primary screen material.

[0083] In this embodiment, the multi-layer vibrating screen includes multiple secondary vibrating screens arranged sequentially in a vertical manner. The secondary vibrating screens are arranged at an upward inclination along the direction from bottom to top. The secondary vibrating screens are provided with multiple secondary screen holes, and the secondary screen holes of the multiple secondary vibrating screens gradually decrease in size along the direction from top to bottom.

[0084] In construction step 4), the primary screen material falls from top to bottom onto the multi-layer vibrating screen. The primary screen material passes through the vibration screening of multiple secondary vibrating screens in sequence, passes through the secondary screen holes, and falls from the bottom of the multi-layer vibrating screen to form powder.

[0085] Multi-layer vibrating screens can perform multi-stage screening of primary materials, and the materials screened at each stage can be transferred accordingly, such as screening crushed stone first, then medium sand, and finally powder. Using a vibrating motor as the excitation source eliminates transmission losses, resulting in stronger excitation force and larger amplitude, allowing the primary material to be rapidly screened stage by stage under vibration.

[0086] In this embodiment, in construction step 5), the measured powder and cement are placed in a mixer. After the powder and cement are mixed and stirred in the mixer for a set time, a measured amount of water is injected into the mixer. The water is then mixed and stirred with the mixed powder and cement for a set time to form a mixture 306.

[0087] Powder, cement, and water are mixed in a specific ratio to form a mixture 306. When cement comes into contact with water, it reacts to form hydrates and a paste, which carries the powder. As the hydration reaction of the cement continues, the water gradually decreases, the paste loses its plasticity and begins to solidify, and over time, crystals are formed.

[0088] The colloids and crystals intertwine to form a network. The colloids act as a binder, binding the powder together, while the powder and crystals act as a framework. All three grow together and are tightly bonded. After a certain period of curing, the strength of the cement gradually increases. Its setting and hardening process promotes the separation of the materials into solidified and strong particles, forming a dense and robust solid.

[0089] In this embodiment, the table mold vibratory press is provided with a vibrating table 300, a support plate 302 on the vibrating table 300, a mold 301 placed on the support plate 302, a plurality of mold cavities in the mold 301, the plurality of mold cavities being arranged in an array; a pressure head 400 is provided on the mold 301, and a plurality of lower pressure plates 401 corresponding to be inserted into the mold cavities are provided on the pressure head 400.

[0090] In construction step 6), during the process of placing the mixture 306 into multiple mold cavities, the vibrating table 300 drives the mold 301 to vibrate up and down and horizontally, and performs preliminary vibration and compression on the mixture 306 placed in the mold cavity.

[0091] In construction step 6), the pressure head 400 moves toward the mold 301 until multiple lower pressure plates 401 press down on the mixture 306 in the mold cavity from top to bottom. The lower pressure plates 401 apply downward static pressure to the mixture 306. The vibrating table 300 drives the mold 301 to vibrate up and down, and performs secondary vibration and pressure on the mixture 306 in the mold cavity so that the mixture 306 in the mold cavity forms a brick blank.

[0092] The mixed material 306 first falls into the housing of the placing trolley through the hopper of the vibratory press. The placing trolley allows the mixed material 306 to fall evenly and smoothly into the mold cavity of the mold 301. After the mixed material 306 is fed into the placing trolley, the placing trolley moves forward and reciprocates rapidly above the mold 301. At the same time, the vibrating table 300 of the vibratory press vibrates, and the mixed material 306 is impacted and vibrated, falling evenly into the mold cavity of the mold 301 and initially compacting it.

[0093] Before the material is laid, the feeding machine sends the pallet 302 to the bottom of the mold 301. After the mixed material 306 is vibrated and formed into brick blanks, the brick conveyor frame drives the pallet 302 to transport the brick blanks to the stacking machine.

[0094] The brick conveying frame consists of two parts: an active conveying area and a passive conveying area. The active conveying area is responsible for feeding bricks, while the passive conveying area has a stacking machine limit switch at the end, which is responsible for starting the stacking machine. When the next pallet 302 is delivered to the passive conveying area, it will push the previous pallet 302 forward until it triggers the stacking machine limit switch, and the stacking machine will start automatically.

[0095] In this embodiment, the stacking machine consists of a frame, a lift, and a slide rail. The lift is attached to the frame and can rise and fall, while the frame can move back and forth along the slide rail. When the stacking machine is working, the lift raises the pallet 302 to a certain height, and then the frame of the stacking machine moves horizontally forward along the slide rail. After reaching the stacking area, the lift lowers to stack the brick blanks and finally returns to its original position.

[0096] In this embodiment, in construction step 7), after the brick blank has been formed in the mold cavity for a set time, the mold 301 and the pressure head 400 move upward away from the support plate 302, and the upward movement speed of the pressure head 400 is lower than the upward movement speed of the mold 301. Multiple lower pressure plates 401 detach the brick blank from the mold cavity, and the support plate 302 carries multiple brick blanks to a set position for curing.

[0097] The stacked pallets 302 are transported to the curing area using a forklift. The curing area is kept clean and flat to prevent the brick blanks from deforming due to site issues.

[0098] The brick blanks are cured naturally, reaching 100% strength in 28 days. The curing time is about 24 hours. Only after curing can the brick blanks be moved or removed from the pallet 302. The stacking height of the brick blanks should not exceed 1.3m.

[0099] In this embodiment, the vibration table 300 is provided with a placement position for the placement plate 302. The interior of the placement position is provided with a lower air chamber 601, which is connected to the air filling and suction device. The placement position is provided with multiple lower air holes 602, which are distributed throughout the placement position. A sealing ring 603 is provided on the outer periphery of the placement position.

[0100] The support plate 302 is provided with multiple upper air chambers 501, and the bottom of the support plate 302 is provided with multiple air holes 503, which are respectively connected to the multiple upper air chambers 501. The support plate 302 is provided with multiple brick support positions corresponding to the mold cavity, and the multiple brick support positions are respectively arranged vertically aligned with the multiple upper air chambers 501. The brick support positions are provided with multiple upper air holes 502, which are connected to the upper air chambers 501.

[0101] In construction step 6), the pallet 302 is placed on the placement position, and the bottom of the pallet 302 abuts against the sealing ring 603 to seal the outer periphery of the lower air chamber 601. The lower air chamber 601 is connected to the upper air chamber 501 through multiple vent holes 503.

[0102] In construction step 6), when the mixture 306 is placed in the mold cavity, the upper air chamber 501 is kept at normal pressure. When the lower pressure plate 401 is inserted into the mold cavity and presses down on the mixture 306 in the mold cavity, and the vibrating table 300 drives the mold 301 to vibrate up and down, the air filling and suction device injects high-pressure gas into the lower air chamber 601. The high-pressure gas presses the mixture 306 from bottom to top through the upper air hole 502.

[0103] In this way, during the process of vibrating and compacting the mixture 306, not only can the downward pressure of the lower platen 401 and the vibration of the vibrating table 300 make the mixture 306 compacted in the mold cavity, but the upward impact of high-pressure gas on the mixture 306 further compacts the mixture 306.

[0104] In construction step 7), during the process of the lower pressure plate 401 detaching the brick blank from the mold cavity, the air filling and suction device fills the lower air chamber 601 with gas so that the upper air chamber 501 forms a negative pressure state.

[0105] The upper air hole 502 can be used to adhere to the bottom of the brick blank, making it easier for the brick blank to be removed from the mold cavity. Of course, the diameter of the upper air hole 502 is small enough to prevent the mixture 306 from falling through the upper air hole 502. In addition, the mixture 306 forms a dense integral structure during the vibration and pressing process, and will not fall through the upper air hole 502.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A construction method for the resource utilization of construction waste through multi-stage crushing, screening, and vibratory pressing of bricks, characterized in that... The construction steps include the following: 1) Place the construction waste in a vibrating feeder and transfer the construction waste in the vibrating feeder to a jaw crusher for crushing to form primary coarse material; 2) The primary coarse material is transferred to a cone crusher for crushing to form secondary coarse material; 3) The secondary coarse material is first screened through a single-layer vibrating screen to form the primary screened material; 4) The initial screened material is conveyed to a multi-layer vibrating screen for sieving from top to bottom to form powder; 5) The powder, cement, and water are metered and mixed to form a mixture; 6) The mixture is conveyed to the mold of the table mold vibratory press, and the mixture placed in the mold is vibrated and pressed to form a brick blank; 7) Remove the brick blank from the mold, cure it for a set time, and form a finished brick; The single-layer vibrating screen includes a single primary vibrating screen arranged inclined from bottom to top, and the primary vibrating screen has primary screen holes; in the construction step 3), the primary vibrating screen is driven from bottom to top, and after the secondary coarse material falls on the primary vibrating screen, as the primary vibrating screen is driven from bottom to top, the secondary coarse material with a diameter smaller than the primary screen holes falls through the primary screen holes to form the primary screen material. The top of the primary vibrating screen is connected to the cone crusher via a return conveyor belt. The secondary coarse material that does not pass through the primary screen holes moves upward with the primary vibrating screen and falls onto the return conveyor belt, which then transports it back to the cone crusher. The multi-layer vibrating screen includes multiple secondary vibrating screens arranged sequentially in a vertical manner, with the secondary vibrating screens inclined upwards along the direction from bottom to top; each secondary vibrating screen is provided with multiple secondary screen holes, with the secondary screen holes of the multiple secondary vibrating screens gradually decreasing in size along the direction from top to bottom. In construction step 4), the primary screening material falls from top to bottom onto the multi-layer vibrating screen. The primary screening material passes through the vibration screening of multiple secondary vibrating screens in sequence, passes through the secondary screen holes, and falls from the bottom of the multi-layer vibrating screen to form the powder. The table mold vibratory press is equipped with a vibrating table, a support plate on the vibrating table, and a mold placed on the support plate. The mold has multiple mold cavities arranged in an array. The mold is equipped with a pressure head, and the pressure head has multiple lower pressure plates that are correspondingly inserted into the mold cavities. In construction step 6), during the process of placing the mixture into multiple mold cavities, the vibrating table drives the mold to vibrate up and down and horizontally, and performs preliminary vibration and compression on the mixture placed in the mold cavity; In construction step 6), the pressure head moves toward the mold until multiple lower pressure plates press against the mixture in the mold cavity from top to bottom. The lower pressure plates apply downward static pressure to the mixture. The vibration table drives the mold to vibrate up and down, and performs secondary vibration and pressure on the mixture in the mold cavity so that the mixture in the mold cavity forms a brick blank. The vibration table is provided with a placement position for placing a tray, and the interior of the placement position is provided with a lower air chamber, which is connected to an air filling and suction device; the placement position is provided with multiple lower air holes, which are distributed throughout the placement position; a sealing ring is provided on the outer periphery of the placement position; The pallet has multiple upper air chambers, and the bottom of the pallet has multiple vent holes, which are respectively connected to the multiple upper air chambers. The pallet has multiple brick support positions corresponding to the mold cavity, and the multiple brick support positions are respectively arranged vertically aligned with the multiple upper air chambers. The brick support positions have multiple upper air holes, which are connected to the upper air chambers. In construction step 6), the pallet is placed on the placement position, and the bottom of the pallet abuts against the sealing ring to seal the outer periphery of the lower air chamber. The lower air chamber is connected to multiple upper air chambers through multiple vent holes. In construction step 6), when the mixture is placed in the mold cavity, the upper air chamber is kept at normal pressure. When the lower pressure plate is inserted into the mold cavity and presses the mixture in the mold cavity downward, and the vibrating table drives the mold to vibrate up and down, the air filling and suction device injects high-pressure gas into the lower air chamber. The high-pressure gas presses the mixture from bottom to top through the upper air hole. In construction step 7), during the process of the lower pressure plate removing the brick blank from the mold cavity, the air filling and suction device fills the lower air chamber with gas so that the upper air chamber forms a negative pressure state.

2. The construction method for resource utilization of construction waste through multi-stage crushing, screening, and vibratory pressing as described in claim 1, characterized in that... The jaw crusher has a primary crushing chamber, in which a fixed jaw plate is arranged at an incline and a movable jaw plate is arranged movably, with the movable jaw plate and the fixed jaw plate arranged at intervals facing each other. The fixed jaw plate has an inclined fixed surface, and the movable jaw plate has a movable surface facing the fixed jaw plate. There is a primary crushing interval for placing construction waste between the fixed surface and the movable surface. Along the primary crushing interval from bottom to top, the fixed surface and the movable surface are inclined away from each other. The upper part of the movable jaw plate is eccentrically connected to the drive rotor, and the lower part of the movable jaw plate is connected to an elastic structure. The elastic structure drives the lower part of the movable jaw plate to swing and reset towards the fixed jaw plate. In construction step 1), when the drive rotor rotates, the movable jaw plate moves up and down reciprocally, and the movable surface moves up and down relative to the fixed surface. The fixed surface and the movable surface perform primary crushing on the construction waste placed in the primary crushing interval to form primary coarse material, which falls from the bottom of the primary crushing interval.

3. The construction method for the resource utilization of construction waste through multi-stage crushing, screening, and vibratory pressing of bricks as described in claim 2, characterized in that... A primary conveyor belt is provided between the jaw crusher and the cone crusher, and an iron remover is provided above the primary conveyor belt; in construction step 1), the primary coarse material falls from the bottom of the primary crushing interval and lands on the primary conveyor belt, which then transports the primary coarse material to the cone crusher; the iron remover magnetically adsorbs iron impurities in the primary coarse material on the primary conveyor belt.

4. The construction method for resource utilization of construction waste through multi-stage crushing, screening, and vibratory pressing as described in claim 3, characterized in that... The cone crusher has a secondary crushing chamber, the outer periphery of the middle part of the secondary crushing chamber has a fixed crushing wall, the secondary crushing chamber is provided with an eccentrically rotating cone head, and the outer periphery of the rotating cone head is provided with a rotating crushing wall. Along the secondary crushing chamber from bottom to top, the fixed crushing wall and the rotating crushing wall are respectively arranged inwardly at an inward angle, and a secondary crushing interval is formed between the fixed crushing wall and the rotating crushing wall. The secondary crushing interval is arranged around the outer periphery of the rotating cone. The middle part of the fixed crushing wall protrudes towards the rotating crushing wall, forming a pointed bent protrusion. The bent protrusion is arranged around the outer periphery of the rotating cone. In construction step 2), the primary coarse material falls from top to bottom into the secondary crushing chamber. The rotating cone rotates eccentrically. During the process of passing through the secondary crushing interval, the primary coarse material is crushed by the compression of the fixed crushing wall and the rotating crushing wall to form secondary coarse material, which falls from the bottom of the secondary crushing chamber.

5. The construction method for resource utilization of construction waste through multi-stage crushing, screening, and vibratory pressing as described in any one of claims 1 to 4, characterized in that... In construction step 5), the measured powder and cement are placed in a mixer. After the powder and cement are mixed and stirred in the mixer for a set time, a measured amount of water is injected into the mixer. The water is then mixed and stirred with the mixed powder and cement for a set time to form the mixture.

6. The construction method for resource utilization of construction waste through multi-stage crushing, screening, and vibratory pressing as described in claim 5, characterized in that... In construction step 7), after the brick blank has been formed in the mold cavity for a set time, the mold and the pressure head move upward away from the support plate, and the upward movement speed of the pressure head is lower than the upward movement speed of the mold. Multiple lower pressure plates detach the brick blank from the mold cavity, and the support plate carries multiple brick blanks to a set position for curing.

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