Construction waste primary screening machine and recycling process

Abstract

A construction waste primary screening and re-screening machine and recycling process, wherein the screening bucket is linked with a feed hopper to ensure that the two maintain an appropriate positional relationship at all times; the inside of the screening bucket is divided into a channel for materials to be crushed, a channel for materials that do not need to be crushed, and a channel for fine materials by a circular hole screen and a wire screen; the channel for materials to be crushed leads to a conveying mechanism for materials to be crushed, the channel for materials that do not need to be crushed leads to a conveying mechanism for materials that do not need to be crushed, and the channel for fine materials leads to a conveying mechanism for fine materials; positioning pins ensure the stability of the entire device after adjustment; the device is arranged before a crusher to allow only materials to be crushed to enter the crusher, thereby increasing a primary screening process to reduce the workload of the crusher and the energy consumption and wear consumption generated thereby; a process for 40% of materials that do not need to be crushed in construction waste is omitted, thereby accelerating the production rhythm and improving production efficiency; and reducing the generation of fine materials with low use value.

Description

Technical Field

[0001] The invention relates to the technical field of construction waste recycling, in particular to a construction waste primary screening and re-screening machine and a recycling process. Background Art

[0002] The amount of construction waste in my country has accounted for 30%-40% of the total urban waste. Most of the construction waste is transported to the suburbs or villages by construction units without any treatment, and is piled up in the open air or landfilled, consuming a large amount of construction funds such as land acquisition fees and garbage removal fees. At the same time, the garbage spillage and dust and sand flying during the removal and stacking process have caused serious environmental pollution. However, there are still many resources in construction waste that can be recycled. For example, red bricks and mortar in construction waste can be crushed to form materials as raw materials for reuse and put into production and life again.

[0003] At present, for the recycling and reuse of construction waste, the existing technology is that after the demolition of the old buildings, the construction waste recycling process is recycling, crushing, and screening. For example, after the construction waste such as red bricks and mortar is recycled, it is directly put into the crusher for crushing, and then enters the screening. However, in the actual demolition, loading and unloading and transportation, the red bricks and mortar in the construction waste will produce a part of materials that do not need to be crushed and can be directly screened due to natural crushing, and fine materials with low use value due to too small particles, of which the materials that do not need to be crushed and can be directly screened account for about 40%. These materials that do not need to be crushed and can be directly screened will form more fine materials with low use value after crushing, and also waste energy and crushing equipment. Therefore, it is necessary to adjust the existing processing technology, sort out this part of the materials that do not need to be crushed from the recycled construction waste first, and then skip the crushing and directly put them into the production of recycling and reuse as raw materials. The existing technology does not have this kind of equipment for directly sorting the newly recycled construction waste, so it is also difficult to adjust the process of construction waste recycling. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and to provide a construction waste primary screening machine and a recycling process.

[0005] The technical solution of the present invention is as follows: The purpose of the present invention is to solve the above-mentioned problem and provide a construction waste primary screening machine, which comprises an integral chassis located at the bottom of the entire device, a fine material conveying mechanism, a bottom conveying mechanism, a screening bucket above the bottom conveying mechanism, a feed hopper, a conveying mechanism for materials to be crushed, a conveying mechanism for materials that do not need to be crushed, and a connecting component connecting the above components;

[0006] The heavy screen bucket comprises a heavy screen bucket box, a round hole screen, a wire screen, a vibration motor, a spring shock-absorbing connection device, a heavy screen bucket bracket, a guide rubber and a guide plate;

[0007] The heavy screen bucket box is fixed to the heavy screen bucket bracket through a spring shock-absorbing connection device, and the heavy screen bucket bracket is connected to the overall chassis;

[0008] The circular hole screen is fixed on the upper part of the inside of the heavy screening bucket box, parallel to the top surface of the heavy screening bucket box, and the diameter of each circular hole corresponds to the set size for distinguishing between the material to be crushed and the material that does not need to be crushed; the wire screen is fixed on the lower part of the inside of the heavy screening bucket box, parallel to the top surface of the heavy screening bucket box; the circular hole screen and the wire screen divide the inside of the heavy screening bucket box into three layers: a channel for materials to be crushed, a channel for materials that do not need to be crushed, and a channel for fine materials; the circular hole screen separates the channel for materials to be crushed and the channel for materials that do not need to be crushed; the wire screen separates the channel for materials that do not need to be crushed and the channel for fine materials; the guide rubber is arranged at the outlet of the channel for materials that do not need to be crushed, tightly fits the inner wall of the channel for materials that do not need to be crushed, and the other end leads to the collection box for materials that do not need to be crushed; the guide plate is arranged at the outlet of the channel for materials to be crushed, tightly fits the inner wall of the channel for materials to be crushed, and the other end leads to the conveying mechanism for materials to be crushed;

[0009] The feed hopper is located above the front end of the overall chassis, and is slightly higher than the heavy screening bucket at the docking position with the heavy screening bucket. The feed hopper comprises a feed hopper enclosure located on the upper side of the feed hopper, a feed hopper conveying device located in the middle position of the feed hopper, and a feed hopper matching lifting device located on the lower side of the feed hopper; the width of the feed hopper conveying device should be smaller than the width of the internal space of the heavy screening bucket; the feed hopper matching lifting device comprises a feed hopper matching lifting track square tube, a feed hopper matching lifting hinge hole and a feed hopper matching hinge plate; the feed hopper matching lifting track square tube is located on both sides of the feed hopper, its length should be smaller than the feed hopper conveying device, and a feed hopper matching lifting hinge hole is provided at the end, and two feed hopper matching hinge plates are provided at the bottom of the other end to connect with the overall chassis.

[0010] The bottom surface of the heavy screening bucket box is an isosceles trapezoidal prism with one acute angle missing, and the top surface, bottom surface and the side surface with the other waist as the generatrix are cut open; the vibration motor is installed on both sides of the heavy screening bucket box; the spring shock-absorbing connecting device is installed on the four corners of the heavy screening bucket box, and contains a spring shock-absorbing upper connecting plate, a shock-absorbing spring and a spring shock-absorbing lower connecting plate; the spring shock-absorbing upper connecting plate is welded from four steel plates, one of which is a fan-shaped steel plate parallel to the side of the heavy screening bucket box and fixed thereon, and the other three steel plates are perpendicular to the fan-shaped steel plates, and the three steel plates form a whole while having an angle between them; the shock-absorbing spring connects the spring shock-absorbing upper connecting plate and the spring shock-absorbing lower connecting plate, and three shock-absorbing springs are respectively connected to the spring shock-absorbing upper connecting plate on the three steel plates having an angle between them; the shock-absorbing lower connecting plate is welded from three steel plates, and each connecting plate is parallel to the spring shock-absorbing upper connecting plate on the three steel plates having an angle between them; the guiding rubber is a tubular structure as a whole and has a certain elasticity; The heavy screen bucket support comprises two "7"-shaped heavy screen bucket support beams symmetrically distributed on both sides of the heavy screen bucket box and a square columnar heavy screen bucket support cross beam close to the "7"-shaped head, and the "7"-shaped tail of each heavy screen bucket support beam is provided with a heavy screen bucket support hinge hole for cooperating with the heavy screen bucket hinge hole; a protrusion is provided at the "7"-shaped corner, and a lifting long hole and a lifting groove are provided on the protrusion; the "7"-shaped head is provided with a feed hopper adjustment hinge hole and a groove for the feed hopper adjustment hinge hole.

[0011] The connecting parts include a lifting connecting part, a linkage connecting column, a random adjustment connecting part and a positioning pin column;

[0012] The lifting connection component cooperates with the linkage connection column to make the heavy screen bucket and the feed hopper linked, and includes a lifting push-pull rod, a lifting square positioning column, a lifting connection plate, a lifting connection pin shaft, and a lifting positioning shaft; the lifting push-pull rod extends from the elliptical hole on the top surface of the lifting connection column until it is fixed on the lifting connection pin shaft; the lifting connection plate fixes the lifting push-pull rod and the lifting square positioning column together; the length of the lifting connection pin shaft does not exceed the outer side surface of the two lifting connection plates; the length of the lifting positioning shaft must exceed The outer side surfaces of the two lifting connection plates are provided with a disc having a diameter greater than the diameter of the middle part of the lifting positioning shaft on each of the two end surfaces; the gap between the inner side surface of the lifting positioning shaft disc and the outer side surface of the lifting connection plate should be greater than the thickness left on one side after the lifting groove is provided on the support beam of the heavy screen bucket bracket; the linkage connection column extends from the square tube of the lifting track of the feed hopper to the groove of the feed hopper adjustment hinge hole, and is hinged with the feed hopper adjustment hinge hole, and a row of unequally spaced through holes corresponding to the lifting hinge hole of the feed hopper is provided on the side, namely the linkage connection column hole; Each of the linkage connection column holes corresponds to a lifting square positioning column hole; two sets of the random adjustment connection parts are used as a group for connecting the fine material conveying mechanism, the material conveying mechanism to be crushed, and the material conveying mechanism that does not require crushing with the overall chassis; each set of random adjustment connection parts contains an L-shaped connecting rod and a columnar connecting rod; the short side of the L-shaped connecting rod is hinged with the fine material conveying mechanism, the material conveying mechanism to be crushed, and the material conveying mechanism that does not require crushing, and the corresponding hinged objects are respectively the fine material conveying belt connecting shaft, the material conveying belt connecting shaft to be crushed, and the material conveying belt connecting shaft that does not require crushing; the middle of the long side of the L-shaped connecting rod is hollow, and the columnar connecting rod can pass through the hollow part, and an L-shaped connecting rod hole is provided at the position combined with the columnar connecting rod; one end of the columnar connecting rod is hinged with the base, corresponding to the fine material conveying mechanism, the material conveying mechanism to be crushed, and the material conveying mechanism that does not require crushing, and the hinged positions are respectively the fine material conveying mechanism connection hole, the simply supported beam connection hole, and the material conveying mechanism that does not require crushing connection hole, and the other end is provided with a row of equidistant through holes corresponding to the L-shaped connecting rod holes, namely the columnar connecting rod holes. The positioning pins are respectively inserted into the lifting square positioning column holes, the linkage connection column holes and the columnar connection rod holes when the lifting connection components, the linkage connection columns and the random adjustment connection components change the motion form to the required state.

[0013] The integral chassis comprises walking crawlers symmetrically distributed at the bottom of the integral chassis, a base located at the upper and lower center positions of the integral chassis, a triangular bracket symmetrically distributed at the rear of the base, an arch bridge structure, a material collection box that does not require crushing, a lifting connection column, a bottom conveyor frame fixing column, and a power source arranged between the feed hopper and the articulated column and the fine material conveying mechanism installation groove; the base comprises a material conveying mechanism installation groove that does not require crushing located at the rear of the base, a material conveying mechanism connection hole that does not require crushing located on the left side of the base, a bottom conveying mechanism installation groove located on the base close to the material conveying mechanism installation groove that does not require crushing, a fine material conveying mechanism installation groove located at the front of the base, and a fine material conveying mechanism connection hole located on the right side of the base. Connection hole; the triangular bracket contains a rotating hole for the conveying mechanism of the material to be crushed at the upper position, a hinge hole for the heavy screen bucket at the upper middle position, and a fixing hole for the bottom conveying mechanism at the lower position; the arch bridge structure is located at the upper end of the triangular bracket, connecting the triangular brackets on both sides, extending backward with a left-right symmetrical simply supported beam, and a simply supported beam connecting hole is provided on the simply supported beam; the lifting and connecting columns are symmetrically distributed at the rear position of the fine material conveying mechanism installation groove, the top surface is a beveled surface and is provided with an elliptical hole and a rectangular hole, and the side surface is provided with a through hole, namely the lifting and connecting column hole; the bottom conveying frame fixing column is located between the lifting and connecting column and the triangular bracket, and is symmetrically distributed left-right, and its top position is provided with a bottom conveying frame fixing hole that cooperates with the bottom conveying mechanism.

[0014] The fine material conveying mechanism is located in the middle and front position of the overall chassis, extending to the right, and comprises a fine material conveying roller, a fine material conveying belt, a fine material conveying frame and a fine material collecting box whose inlet width is greater than the width of the bottom conveying mechanism; the rotating shaft of the fine material conveying belt is arranged on both sides of the fine material conveying frame, below the fine material collecting box, and is hinged to the base in the installation groove of the fine material conveying mechanism; the connecting shaft of the fine material conveying belt is arranged on both sides of the fine material conveying frame, close to the middle of the length direction of the fine material conveying frame;

[0015] The bottom conveying mechanism is located at the rear of the overall chassis, and includes a bottom conveying roller, a bottom conveying belt, a bottom conveying frame and a bottom collecting box; the bottom conveying roller and the two ends of the bottom conveying belt support the bottom conveying belt, and a U-shaped bottom conveying frame is provided at both ends of the bottom conveying belt to surround the bottom conveying roller and the bottom conveying belt, and a bottom collecting box is provided above the U-shaped bottom position, and the side of the U-shaped bottom position is hinged with the fixing hole of the bottom conveying mechanism, and a bottom conveying belt connecting shaft is provided in the middle front position in the length direction of the bottom conveying frame, which cooperates with the fixing hole of the bottom conveying frame to fix the bottom conveying mechanism;

[0016] The conveying mechanism for materials to be crushed is located at the rearward position of the overall chassis, extending backward, and comprises conveying rollers for materials to be crushed, a conveying belt for materials to be crushed, a conveying frame for materials to be crushed and a collecting box for materials to be crushed; the conveying rollers for materials to be crushed support the conveying belt for materials to be crushed at both ends of the conveying belt for materials to be crushed in the length direction, and U-shaped conveying frames for materials to be crushed are arranged at both ends of the conveying of materials to be crushed, which surround the conveying rollers for materials to be crushed and the conveying belt for materials to be crushed, and a collecting box for materials to be crushed is arranged above the bottom position of the U-shape; the conveying frame for materials to be crushed comprises a lifting and positioning shaft and a connecting shaft for a conveying belt for crushed materials; the lifting and positioning shaft is arranged on both sides of the conveying frame for materials to be crushed, below the collecting box for materials to be crushed, and is hinged to the overall chassis at the rotating hole of the conveying mechanism for materials to be crushed; the connecting shaft for the conveying belt for crushed materials is arranged on both sides of the conveying frame for materials to be crushed, close to the connecting shaft for the conveying belt for materials to be crushed in the middle of the length direction of the conveying frame for materials to be crushed;

[0017] The conveying mechanism for materials that do not require crushing is located at the rear of the overall chassis, between the conveying mechanism for materials to be crushed and the chassis, and extends to the left side, and includes conveying rollers for materials that do not require crushing, conveying belts for materials that do not require crushing, and conveying frames for materials that do not require crushing; there are three conveying rollers for materials that do not require crushing, two of which are arranged in a collecting box for materials that do not require crushing, and their axial directions are parallel to the longitudinal direction of the base, wherein the conveying roller for materials that do not require crushing on the left side of the base and another conveying roller for materials that do not require crushing are clamped by two conveying frames for materials that do not require crushing; the connecting shafts of the conveying belts for materials that do not require crushing are arranged on both sides of the conveying frames for materials that do not require crushing, close to the middle of the length direction of the conveying frames for materials that do not require crushing.

[0018] The feed hopper matching hinged plate can clamp the feed hopper matching hinged column and be hinged therewith.

[0019] A construction waste recycling process using the above-mentioned construction waste primary screening and re-screening machine comprises the following steps:

[0020] ① Recycling: The construction waste removed from the demolition site is loaded as materials and transported back to the work site where the construction waste primary screening machine is located;

[0021] ② Preliminary screening: Turn on the construction waste preliminary screening machine that has been adjusted on site, and use an excavator to put the recovered materials into the feed hopper one by one; the feed hopper will buffer the impact of these materials when they are put in, and then transport them to the re-screening hopper; the vibration motor drives the re-screening hopper to vibrate, so that the materials can be screened evenly and effectively through the round hole screen and wire screen;

[0022] After the material enters the heavy screening hopper from the feed hopper, it will move downward along the material channel to be crushed with a certain inclination angle; accompanied by the vibration brought by the vibration motor, the material to be crushed is screened by the circular hole screen, and then enters the material conveying mechanism to be crushed through the guide plate; the remaining material passes through the circular holes of the circular empty screen and enters the material channel that does not need to be crushed, which also has a certain inclination; in the material channel that does not need to be crushed, accompanied by the vibration brought by the vibration motor, the remaining material is divided into material that does not need to be crushed and fine material by the wire screen; the material that does not need to be crushed enters the material conveying mechanism that does not need to be crushed, and the fine material passes through the wire screen and is sent to the fine material conveying mechanism by the bottom conveying mechanism;

[0023] ③ Crushing: The material to be crushed is crushed by a crusher;

[0024] ④ Screening: The crushed materials and the materials that do not need to be crushed in step ① enter the aggregate screening process together to separate coarse aggregate and fine aggregate of different particle sizes.

[0025] The on-site adjustment of the construction waste primary selection and re-screening machine is to adjust the rising height of the lifting connection components according to the actual situation of the work site, drive the movement of the linkage connection column, and simultaneously adjust the inclination angles of the re-screening bucket and the feed hopper in coordination with each other to ensure that the excavator has sufficient working space in front of the feed hopper; at the same time, adjust the inclination angles of the fine material conveying mechanism, the material conveying mechanism to be crushed, and the material conveying mechanism that does not require crushing relative to the overall chassis to ensure that the materials they convey can be kept at a suitable distance away from the construction waste primary selection and re-screening machine to distinguish the materials; when adjusting the above structure, use random adjustment connection components and positioning pins to fix them respectively.

[0026] The beneficial effects of the present invention are as follows: in the construction waste primary screening and re-screening machine of the present invention, the re-screening bucket is linked with the feed hopper to ensure that the re-screening bucket and the feed hopper maintain an appropriate positional relationship at all times; the inside of the re-screening bucket box is divided into a channel for materials to be crushed, a channel for materials that do not need to be crushed, and a channel for fine materials by a circular hole screen and a wire screen; the channel for materials to be crushed leads to a conveying mechanism for materials to be crushed, the channel for materials that do not need to be crushed leads to a conveying mechanism for materials that do not need to be crushed, and the channel for fine materials leads to a conveying mechanism for fine materials; the positioning pins ensure the stability of the entire device after adjustment; the above-mentioned device is arranged before the crusher, and only the materials to be crushed are allowed to enter the crusher, thereby increasing the primary screening process to reduce the workload of the crusher and the energy consumption and wear consumption generated thereby; a process for 40% of the materials that do not need to be crushed in the construction waste is eliminated, thereby speeding up the production rhythm and improving production efficiency; at the same time, the generation of fine materials with low use value is reduced, and the quality of the materials is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the construction waste primary screening and re-screening machine of the present invention. Figure 1 ;

[0028] Figure 2 yes Figure 1 The main view;

[0029] Figure 3 yes Figure 2 A magnified view of;

[0030] Figure 4 yes Figure 2 B magnified view;

[0031] Figure 5 yes Figure 2 C magnified view;

[0032] Figure 6 yes Figure 1 A top view of

[0033] Figure 7 yes Figure 6 DD cross-sectional view;

[0034] Figure 8 yes Figure 1 Left view of;

[0035] Fig. 9 yes Figure 8 E magnified view;

[0036] Fig.10 yes Figure 8 F magnified view;

[0037] Fig.11 The structure of the heavy screening bucket of the construction waste primary screening machine of the present invention is shown in FIG. Figure 1 ;

[0038] Fig.12 yes Fig.11 The main view;

[0039] Fig.13 yes Fig.12 GG cross-sectional view;

[0040] Fig.14 yes Fig.12 H magnified view;

[0041] Fig.15 yes Fig.11 A top view of

[0042] Fig.16 yes Fig.15 JJ sectional view;

[0043] Fig.17 yes Fig.11 Right view of;

[0044] Fig.18It is a front view of the lifting and connecting components of the construction waste primary selection and re-screening machine of the present invention;

[0045] Fig.19 yes Fig.18 KK cross-sectional view;

[0046] Fig. 20 yes Fig.18 A top view of

[0047] Fig.21 It is a front view of the random adjustment connection parts of the construction waste primary selection and re-screening machine of the present invention;

[0048] Fig. 22 yes Fig.21 Right view of;

[0049] Fig.23 This is a schematic diagram of the structure of the construction waste primary screening and re-screening machine of the present invention. Figure 2 ;

[0050] In the figure: 1. Overall chassis, 2. Fine material conveying mechanism, 3. Bottom conveying mechanism, 4. Heavy screening bucket, 5. Feed hopper, 6. Conveying mechanism for materials to be crushed, 7. Conveying mechanism for materials not requiring crushing, 8. Connecting parts, 11. Walking crawler, 12. Base, 121. Mounting slot for conveying mechanism for materials not requiring crushing, 122. Connecting hole for conveying mechanism for materials not requiring crushing, 123. Mounting slot for bottom conveying mechanism, 124. Mounting slot for fine material conveying mechanism, 125. Connecting hole for fine material conveying mechanism, 13. Triangular bracket, 131. Rotating hole for conveying mechanism for materials to be crushed, 132. Hinge hole for heavy screening bucket, 133. Fixed hole for bottom conveying mechanism, 14. Arch bridge structure, 141. Simply supported beam, 142. Connecting hole for simply supported beam, 15. Collection box for materials not requiring crushing, 16. Lifting connecting column, 161. Lifting connecting column hole, 17. Bottom conveyor frame fixing column, 171. Bottom conveyor frame fixing hole, 18. Feed hopper matching hinge column, 19. Power source, 22. Fine material conveyor belt, 23. Fine material conveyor frame, 231. Fine material conveyor belt rotating shaft, 232. Fine material conveyor belt connecting shaft, 24. Fine material collecting box, 31. Bottom conveyor roller, 32. Bottom conveyor belt, 33. Bottom conveyor frame, 331. Bottom conveyor belt connecting shaft, 34. Bottom collecting box, 41. Heavy screening bucket box, 411. Material channel to be crushed, 412. Material channel without crushing, 413. Fine material channel, 42. Round hole screen, 43. Steel wire screen, 44. Vibration motor, 45. Spring shock-absorbing connecting device, 451. Spring shock-absorbing upper connecting plate, 452. Shock-absorbing spring, 453. Spring shock-absorbing lower connecting plate, 46. Heavy sieve bucket support, 461. Heavy sieve bucket support beam, 462. Heavy sieve bucket support crossbeam, 463. Heavy sieve bucket support hinge hole, 464. Lifting long hole, 465. Lifting slot, 466. Feed hopper adjustment hinge hole, 467. Feed hopper adjustment hinge hole slot, 47. Guide rubber, 48. Guide plate, 51. Feed hopper enclosure, 52. Feed hopper conveying device, 53. Feed hopper with lifting device, 531. Feed hopper with lifting track square tube, 532. Feed hopper with lifting hinge hole, 533. Feed hopper with hinge plate, 61. Conveying roller for material to be crushed, 62. Conveying belt for material to be crushed, 63. Conveying rack for material to be crushed, 71. Conveying roller for material not to be crushed, 72. Conveying belt for material not to be crushed, 73. Conveying rack for material not to be crushed, 81. Lifting connection parts, 811. Lifting push-pull rod, 812. Lifting square positioning column, 8121. Lifting square positioning column hole, 813. Lifting connecting plate, 814. Lifting connecting pin, 815. Lifting positioning shaft, 82. Linkage connecting column, 821. Linkage connecting column hole, 83. Random adjustment connecting parts, 831. L-shaped connecting rod, 8311.L-shaped connecting rod hole, 832. Column connecting rod, 8321. Column connecting rod hole, 84. Positioning pin column. . DETAILED DESCRIPTION

[0051] Example 1: See Figure 1-23 , a construction waste primary screening and re-screening machine, comprising an integral chassis at the bottom of the entire device, a fine material conveying mechanism, a bottom conveying mechanism, a re-screening bucket above the bottom conveying mechanism, a feed hopper, a conveying mechanism for materials to be crushed, a conveying mechanism for materials that do not need to be crushed, and a connecting component connecting the above components;

[0052] The invention comprises a heavy screening bucket box whose bottom surface is an isosceles trapezoidal prism with one acute angle missing, and whose top surface, bottom surface and other waist are cut open on the side with the generatrix as the main line, a circular hole screen fixed on the upper part of the inside of the heavy screening bucket box and parallel to the top surface of the heavy screening bucket box, each circular hole of which has a diameter of 32.5 mm, a steel wire screen fixed on the lower part of the inside of the heavy screening bucket box and parallel to the top surface of the heavy screening bucket box, a vibration motor installed on both sides of the heavy screening bucket box, a spring shock-absorbing connection device installed on the four corners of the heavy screening bucket box to ensure the horizontal stability of the heavy screening bucket box, a heavy screening bucket bracket, a tubular guide rubber and a guide plate with a certain elasticity; the circular hole screen and the steel wire screen divide the inside of the heavy screening bucket box into three layers: a channel for materials to be crushed, a channel for materials that do not need to be crushed and a channel for fine materials; the circular hole screen separates the channel for materials to be crushed and the channel for materials that do not need to be crushed; the steel wire screen separates the channel for materials that do not need to be crushed and Fine material channel; the guide rubber is arranged at the outlet of the material channel that does not need to be crushed, closely fits the inner wall of the material channel that does not need to be crushed, and the other end leads to the material collection box that does not need to be crushed; the guide plate is arranged at the outlet of the material channel to be crushed, closely fits the inner wall of the material channel to be crushed, and the other end leads to the material conveying mechanism to be crushed; the heavy screen bucket bracket comprises two "7"-shaped heavy screen bucket bracket support beams symmetrically distributed on both sides of the heavy screen bucket box and a square column heavy screen bucket bracket cross beam close to the "7"-shaped head, and the "7"-shaped tail of each heavy screen bucket bracket support beam is provided with a heavy screen bucket bracket hinge hole for cooperating with the heavy screen bucket hinge hole; a protrusion is provided at the "7"-shaped corner, and a lifting long hole and a lifting groove are provided on the protrusion; the "7"-shaped head is provided with a feed hopper adjustment hinge hole and a feed hopper adjustment hinge hole groove;

[0053] The connecting components include a lifting connecting component, a linkage connecting column, a random adjustment connecting component and a positioning pin that cooperate with the linkage connecting column to enable linkage between the heavy screening bucket and the feed hopper; the lifting connecting component includes a lifting push-pull rod extending from the elliptical hole on the top surface of the lifting connecting column until it is fixed on the lifting connecting pin shaft, a lifting square positioning column, a lifting connecting plate that fixes the lifting push-pull rod and the lifting square positioning column together, a lifting connecting pin shaft whose length does not exceed the outer side surface of the two lifting connecting plates, and a lifting positioning shaft whose length must exceed the outer side surface of the two lifting connecting plates, and a disc with a diameter greater than the diameter of the middle part of the lifting positioning shaft is provided on each of the two end faces; the linkage connecting column extends from the square tube of the lifting track cooperating with the feed hopper to the groove for the feed hopper adjustment hinge hole, and is hinged with the feed hopper adjustment hinge hole, and a row of unequally spaced through holes corresponding to the lifting hinge hole cooperating with the feed hopper, namely linkage connecting column holes, are provided on the side, and each linkage connecting column hole corresponds to a lifting square positioning column hole.

[0054] The integral chassis comprises walking tracks symmetrically distributed at the bottom of the integral chassis, a base located at the upper and lower center positions of the integral chassis, a triangular bracket located at the rear of the base, shaped like a triangle and symmetrically distributed at the left and right sides, an arch bridge structure, a four-sided boss fixed in the installation groove of the material conveying mechanism that does not require crushing, which is inverted up and down and has a small end that fits together, upper and lower through holes, a material collection box that does not require crushing and is cut open on the side of the lower four-sided boss facing the left side of the chassis, a lifting connecting column, a bottom conveying frame fixing column, and a power source provided between the feed hopper matching hinge column and the fine material conveying mechanism installation groove to provide power for the entire device; the base comprises a material conveying mechanism installation groove that does not require crushing located at the rear of the base, connecting holes for the material conveying mechanism that does not require crushing located at both ends of the material conveying mechanism installation groove on the left side of the base, a bottom conveying mechanism installation groove located at the base close to the material conveying mechanism installation groove that does not require crushing, and a fine material conveying mechanism located at the front position of the base. The installation slot is located on the right side of the base, and the fine material conveying mechanism connecting holes at both ends of the fine material conveying mechanism installation slot; the triangular bracket contains a rotating hole for the material conveying mechanism to be crushed near the apex of the triangular bracket, a heavy screen bucket hinge hole at a higher position on the side near the middle of the triangular bracket, and a bottom conveying mechanism fixing hole that is lower than the heavy screen bucket hinge hole; the arch bridge structure is located at the upper end of the triangular bracket, connecting the triangular brackets on both sides, extending backward a left-right symmetrical simply supported beam, and a simply supported beam connecting hole is provided on the simply supported beam; the lifting and connecting column is located at the rear position of the fine material conveying mechanism installation slot, and is symmetrically distributed on the left and right sides of the base, the top surface is a beveled surface and is provided with an elliptical hole and a rectangular hole; and a through hole is provided on the side below the beveled surface, namely, the lifting and connecting column hole; the bottom conveying frame fixing column is located between the lifting and connecting column and the triangular bracket, and is symmetrically distributed on the left and right sides of the base, and its top position is provided with a bottom conveying frame fixing hole that cooperates with the bottom conveying mechanism.

[0055] The fine material conveying mechanism is located in the middle and front position of the overall chassis, extending to the right side, and comprises a fine material conveying roller, a fine material conveying belt, a fine material conveying frame and a fine material collecting box whose inlet width is greater than the width of the bottom conveying mechanism; the fine material conveying belt rotating shaft is arranged on both sides of the fine material conveying frame, below the fine material collecting box, and is hinged to the base in the installation groove of the fine material conveying mechanism; the fine material conveying belt connecting shaft is arranged on both sides of the fine material conveying frame, close to the middle of the length direction of the fine material conveying frame.

[0056] The bottom conveying mechanism is located at the rearward position of the overall chassis, and contains bottom conveying rollers, bottom conveying belts, bottom conveying frames and bottom collecting boxes; the bottom conveying rollers and the two ends of the bottom conveying belts support the bottom conveying belts, and U-shaped bottom conveying frames are provided at both ends of the bottom conveying belts, which surround the bottom conveying rollers and the bottom conveying belts, and a bottom collecting box is provided above the U-shaped bottom position, which is hinged to the fixing hole of the bottom conveying mechanism at the side of the U-shaped bottom position, and a bottom conveying belt connecting shaft is provided in the middle front position in the length direction of the bottom conveying frame, which cooperates with the fixing hole of the bottom conveying frame to fix the bottom conveying mechanism; the upper and lower through holes of the bottom collecting box are inverted quadrangular bosses that are cut open on the side facing the longitudinal front of the chassis.

[0057] The feed hopper is located above the front end of the overall chassis, and is slightly higher than the heavy screening hopper at the docking position with the heavy screening hopper. It contains a feed hopper enclosure located on the upper side of the feed hopper to ensure that the material can be gathered and enter the feed hopper conveying device, a feed hopper conveying device located in the middle position of the feed hopper to ensure that the material entering the feed hopper conveying device is conveyed to the top of the heavy screening hopper and enters the heavy screening hopper, and a feed hopper matching lifting device located on the lower side of the feed hopper; the width of the feed hopper conveying device should be smaller than the width of the internal space of the heavy screening hopper; the feed hopper matching lifting device contains a feed hopper matching lifting track square tube, a feed hopper matching lifting hinge hole and a feed hopper matching hinge plate; the feed hopper matching lifting track square tube is located on both sides of the feed hopper, its length should be smaller than the feed hopper conveying device, and a feed hopper matching lifting hinge hole is provided at the end, and two feed hopper matching hinge plates are provided at the lower part of the other end; the matching hinge plate can clamp the feed hopper matching hinge column and be hinged to it.

[0058] The conveying mechanism for materials to be crushed is located at the rearward position of the overall chassis, extending backward, and comprises conveying rollers for materials to be crushed, a conveying belt for materials to be crushed, a conveying frame for materials to be crushed and a collecting box for materials to be crushed; the conveying rollers for materials to be crushed support the conveying belt for materials to be crushed at both ends of the conveying belt for materials to be crushed in the length direction, and U-shaped conveying frames for materials to be crushed are arranged at both ends of the conveying of materials to be crushed, surrounding the conveying rollers for materials to be crushed and the conveying belt for materials to be crushed, and a collecting box for materials to be crushed is arranged above the bottom position of the U-shape; the conveying frame for materials to be crushed comprises a rotating shaft for the conveying belt for materials to be crushed, which is arranged on both sides of the conveying frame for materials to be crushed and below the collecting box for materials to be crushed, and is hinged to the overall chassis at the rotating hole of the conveying mechanism for materials to be crushed, and a connecting shaft for the conveying belt for materials to be crushed, which is arranged on both sides of the conveying frame for materials to be crushed and close to the middle of the conveying frame for materials to be crushed in the length direction.

[0059] The conveying mechanism for material that does not require crushing is located at the rear position of the overall chassis, between the conveying mechanism for material to be crushed and the chassis, and extends to the left side, and includes conveying rollers for material that does not require crushing, conveying belts for material that does not require crushing, and conveying frames for material that does not require crushing; there are three conveying rollers for material that does not require crushing, two of which are arranged in a collecting box for material that does not require crushing, and their axial directions are parallel to the longitudinal direction of the base, wherein the conveying roller for material that does not require crushing on the left side of the base and the other conveying roller for material that does not require crushing are clamped by two conveying frames for material that does not require crushing; the three conveying rollers for material that does not require crushing ensure that the conveying belts for material that does not require crushing that cooperate with them remain horizontal above the base, are raised on the left side of the base, and form an inclination angle with the base; the connecting shafts of the conveying belts for material that does not require crushing are arranged on both sides of the conveying frames for material that does not require crushing, close to the middle of the length direction of the conveying frames for material that does not require crushing.

[0060] The gap between the inner side of the lifting positioning shaft disc and the outer side of the lifting connecting plate should be greater than the thickness left on one side after the lifting groove is set on the support beam of the heavy screen bucket bracket to ensure that the lifting positioning shaft can slide in the lifting long hole.

[0061] The two sets of randomly adjustable connecting parts are a group used for connecting the fine material conveying mechanism, the material conveying mechanism to be crushed, the material conveying mechanism that does not require crushing and the overall chassis; each set of randomly adjustable connecting parts contains an L-shaped connecting rod and a columnar connecting rod; the short side of the L-shaped connecting rod is hinged with the fine material conveying mechanism, the material conveying mechanism to be crushed, and the material conveying mechanism that does not require crushing, and the corresponding hinged structures are respectively the fine material conveying belt connecting shaft, the material conveying belt connecting shaft to be crushed, and the material conveying belt connecting shaft that does not require crushing; the middle of the long side of the L-shaped connecting rod is hollow, the columnar connecting rod can pass through the hollow part, and an L-shaped connecting rod hole is provided at the position combined with the columnar connecting rod; one end of the columnar connecting rod is hinged with the base, corresponding to the fine material conveying mechanism, the material conveying mechanism to be crushed, and the material conveying mechanism that does not require crushing, and the hinged positions are respectively the fine material conveying mechanism connection hole, the simply supported beam connection hole, and the material conveying mechanism that does not require crushing, and the other end is provided with a row of equidistant through holes corresponding to the L-shaped connecting rod holes, namely the columnar connecting rod holes.

[0062] The positioning pins are inserted into the lifting square positioning column holes, linkage connection column holes and columnar connection rod holes respectively when the lifting connection parts, linkage connection columns and random adjustment connection parts change the motion form to the required state to ensure the stability of the required state.

[0063] The spring shock-absorbing connecting device comprises a spring shock-absorbing upper connecting plate, a shock-absorbing spring and a spring shock-absorbing lower connecting plate; the spring shock-absorbing upper connecting plate is welded from four steel plates, one of which is a fan-shaped steel plate parallel to and fixed on the side of the heavy screening bucket box, and the other three steel plates are perpendicular to the fan-shaped steel plates, and the three steel plates are at an angle to each other and form a whole; the shock-absorbing spring connects the spring shock-absorbing upper connecting plate and the spring shock-absorbing lower connecting plate, and the three shock-absorbing springs are respectively connected to the spring shock-absorbing upper connecting plate on the three steel plates at an angle to each other; the shock-absorbing lower connecting plate is welded from three steel plates, and each connecting plate is parallel to the spring shock-absorbing upper connecting plate on the three steel plates at an angle to each other; the spring shock-absorbing upper connecting plate is fixed on the heavy screening bucket box, and the spring shock-absorbing lower connecting plate is fixed on the supporting beam of the heavy screening bucket bracket to avoid resonance of the entire device caused by the vibration of the vibration motor and decomposition of the entire equipment.

[0064] The heavy screening bucket and the feed hopper can be linked by the lifting connection component and the linkage connection column, so as to ensure that the heavy screening bucket and the feed hopper can keep the appropriate position at any time; and the to-be-crushed material channel, the non-crushed material channel and the fine material channel of the heavy screening bucket can respectively send the to-be-crushed material, the non-crushed material and the fine material into the to-be-crushed material conveying mechanism, the non-crushed material conveying mechanism and the fine material conveying mechanism; the principle is to separate the to-be-crushed material and the non-crushed material by the circular hole screen, and the to-be-crushed material enters the to-be-crushed material conveying mechanism through the inclination of the heavy screening bucket and the guidance of the guide plate, and the area where this process occurs is the to-be-crushed material channel; then the non-crushed material is separated from the usable non-crushed material in the non-crushed material channel through the wire screen, the fine material enters the fine material channel and then enters the fine material conveying mechanism, and the usable non-crushed material enters the non-crushed material conveying mechanism through the inclination of the heavy screening bucket and the guidance of the guide rubber;

[0065] Embodiment 2: A construction waste recycling process using the aforementioned construction waste primary screening and re-screening machine comprises the following steps:

[0066] ① Recycling: The construction waste removed from the demolition site is loaded as materials and transported back to the work site where the construction waste primary screening machine is located;

[0067] ② Preliminary screening: Turn on the construction waste preliminary screening machine that has been adjusted on site, and use an excavator to put the recovered materials into the feed hopper one by one; the feed hopper will buffer the impact of these materials when they are put in, and then transport them to the re-screening hopper; the vibration motor drives the re-screening hopper to vibrate, so that the materials can be screened evenly and effectively through the round hole screen and wire screen;

[0068] After the material enters the heavy screening hopper from the feed hopper, it will move downward along the material channel to be crushed with a certain inclination angle; accompanied by the vibration brought by the vibration motor, the material to be crushed is screened by the circular hole screen, and then enters the material conveying mechanism to be crushed through the guide plate; the remaining material passes through the circular holes of the circular empty screen and enters the material channel that does not need to be crushed, which also has a certain inclination; in the material channel that does not need to be crushed, accompanied by the vibration brought by the vibration motor, the remaining material is divided into material that does not need to be crushed and fine material by the wire screen; the material that does not need to be crushed enters the material conveying mechanism that does not need to be crushed, and the fine material passes through the wire screen and is sent to the fine material conveying mechanism by the bottom conveying mechanism;

[0069] ③ Crushing: The material to be crushed is crushed by a crusher;

[0070] ④ Screening: The crushed materials and the materials that do not need to be crushed in step ① enter the aggregate screening process together to separate coarse aggregate and fine aggregate of different particle sizes.

[0071] The on-site adjustment of the construction waste primary selection and re-screening machine is to adjust the rising height of the lifting connection components according to the actual situation of the work site, drive the movement of the linkage connection column, and simultaneously adjust the inclination angles of the re-screening bucket and the feed hopper in coordination with each other to ensure that the excavator has sufficient working space in front of the feed hopper; at the same time, adjust the inclination angles of the fine material conveying mechanism, the material conveying mechanism to be crushed, and the material conveying mechanism that does not require crushing relative to the overall chassis to ensure that the materials they convey can be kept at a suitable distance away from the construction waste primary selection and re-screening machine to distinguish the materials; when adjusting the above structure, use random adjustment connection components and positioning pins to fix them respectively.

Claims

1. A construction waste primary screening machine, comprising an integral chassis located at the bottom of the entire device, a fine material conveying mechanism, a bottom conveying mechanism, a screening bucket above the bottom conveying mechanism, a feed hopper, a conveying mechanism for materials to be crushed, a conveying mechanism for materials that do not need to be crushed, and a connecting component connecting the above components; The heavy screen bucket comprises a heavy screen bucket box, a round hole screen, a wire screen, a vibration motor, a spring shock-absorbing connection device, a heavy screen bucket bracket, a guide rubber and a guide plate; Features: The heavy screen bucket box is fixed to the heavy screen bucket bracket through a spring shock-absorbing connection device, and the heavy screen bucket bracket is connected to the overall chassis; The circular hole screen is fixed on the upper part of the inside of the heavy screening bucket box, parallel to the top surface of the heavy screening bucket box, and the diameter of each circular hole corresponds to the set size for distinguishing between the material to be crushed and the material that does not need to be crushed; the wire screen is fixed on the lower part of the inside of the heavy screening bucket box, parallel to the top surface of the heavy screening bucket box; the circular hole screen and the wire screen divide the inside of the heavy screening bucket box into three layers: a channel for materials to be crushed, a channel for materials that do not need to be crushed, and a channel for fine materials; the circular hole screen separates the channel for materials to be crushed and the channel for materials that do not need to be crushed; the wire screen separates the channel for materials that do not need to be crushed and the channel for fine materials; the guide rubber is arranged at the outlet of the channel for materials that do not need to be crushed, tightly fits the inner wall of the channel for materials that do not need to be crushed, and the other end leads to the collection box for materials that do not need to be crushed; the guide plate is arranged at the outlet of the channel for materials to be crushed, tightly fits the inner wall of the channel for materials to be crushed, and the other end leads to the conveying mechanism for materials to be crushed; The feed hopper is located above the front end of the overall chassis, and is slightly higher than the heavy screening bucket at the docking position with the heavy screening bucket. The feed hopper comprises a feed hopper enclosure located on the upper side of the feed hopper, a feed hopper conveying device located in the middle position of the feed hopper, and a feed hopper matching lifting device located on the lower side of the feed hopper; the width of the feed hopper conveying device should be smaller than the width of the internal space of the heavy screening bucket; the feed hopper matching lifting device comprises a feed hopper matching lifting track square tube, a feed hopper matching lifting hinge hole and a feed hopper matching hinge plate; the feed hopper matching lifting track square tube is located on both sides of the feed hopper, its length should be smaller than the feed hopper conveying device, and a feed hopper matching lifting hinge hole is provided at the end, and two feed hopper matching hinge plates are provided at the bottom of the other end to connect with the overall chassis.

2. The construction waste primary screening and re-screening machine according to claim 1, characterized in that: The bottom surface of the heavy screening bucket box is an isosceles trapezoidal prism with one acute angle missing, and the top surface, bottom surface and the side surface with the other waist as the generatrix are cut open; the vibration motor is installed on both sides of the heavy screening bucket box; the spring shock-absorbing connecting device is installed on the four corners of the heavy screening bucket box, and contains a spring shock-absorbing upper connecting plate, a shock-absorbing spring and a spring shock-absorbing lower connecting plate; the spring shock-absorbing upper connecting plate is welded from four steel plates, one of which is a fan-shaped steel plate parallel to the side of the heavy screening bucket box and fixed thereon, and the other three steel plates are perpendicular to the fan-shaped steel plates, and the three steel plates form a whole while having an angle between them; the shock-absorbing spring connects the spring shock-absorbing upper connecting plate and the spring shock-absorbing lower connecting plate, and three shock-absorbing springs are respectively connected to the spring shock-absorbing upper connecting plate on the three steel plates having an angle between them; the shock-absorbing lower connecting plate is welded from three steel plates, and each connecting plate is parallel to the spring shock-absorbing upper connecting plate on the three steel plates having an angle between them; the guiding rubber is a tubular structure as a whole and has a certain elasticity; The heavy screen bucket support comprises two "7"-shaped heavy screen bucket support beams symmetrically distributed on both sides of the heavy screen bucket box and a square column heavy screen bucket support cross beam close to the "7"-shaped head, and the "7"-shaped tail of each heavy screen bucket support beam is provided with a heavy screen bucket support hinge hole for cooperating with the heavy screen bucket hinge hole; a protrusion is provided at the "7"-shaped corner, and a lifting long hole and a lifting groove are provided on the protrusion; the "7"-shaped head is provided with a feed hopper adjustment hinge hole and a feed hopper adjustment hinge hole groove.

3. The construction waste primary screening and re-screening machine according to claim 1, characterized in that: The connecting parts include a lifting connecting part, a linkage connecting column, a random adjustment connecting part and a positioning pin column; The lifting connection component cooperates with the linkage connection column to make the heavy screen bucket and the feed hopper linked, and includes a lifting push-pull rod, a lifting square positioning column, a lifting connection plate, a lifting connection pin shaft, and a lifting positioning shaft; the lifting push-pull rod extends from the elliptical hole on the top surface of the lifting connection column until it is fixed on the lifting connection pin shaft; the lifting connection plate fixes the lifting push-pull rod and the lifting square positioning column together; the length of the lifting connection pin shaft does not exceed the outer side surface of the two lifting connection plates; the length of the lifting positioning shaft must exceed The outer side surfaces of the two lifting connection plates are provided with a disc having a diameter greater than the diameter of the middle part of the lifting positioning shaft on each of the two end surfaces; the gap between the inner side surface of the lifting positioning shaft disc and the outer side surface of the lifting connection plate should be greater than the thickness left on one side after the lifting groove is provided on the support beam of the heavy screen bucket bracket; the linkage connection column extends from the square tube of the lifting track of the feed hopper to the groove of the feed hopper adjustment hinge hole, and is hinged with the feed hopper adjustment hinge hole, and a row of unequally spaced through holes corresponding to the lifting hinge hole of the feed hopper is provided on the side, namely the linkage connection column hole; Each of the linkage connection column holes corresponds to a lifting square positioning column hole; two sets of the random adjustment connection parts are used as a group for connecting the fine material conveying mechanism, the material conveying mechanism to be crushed, the material conveying mechanism that does not require crushing and the overall chassis; each set of random adjustment connection parts contains an L-shaped connecting rod and a columnar connecting rod; the short side of the L-shaped connecting rod is hinged with the fine material conveying mechanism, the material conveying mechanism to be crushed, and the material conveying mechanism that does not require crushing, and the corresponding hinged objects are respectively the fine material conveying belt connecting shaft, the material conveying belt connecting shaft to be crushed, and the material conveying belt connecting shaft that does not require crushing; the middle of the long side of the L-shaped connecting rod is hollow, the columnar connecting rod can pass through the hollow part, and an L-shaped connecting rod hole is provided at the position where it is combined with the columnar connecting rod; one end of the columnar connecting rod is hinged with the base, corresponding to the fine material conveying mechanism, the material conveying mechanism to be crushed, and the material conveying mechanism that does not require crushing, and the hinged positions are respectively the fine material conveying mechanism connection hole, the simply supported beam connection hole, and the material conveying mechanism that does not require crushing connection hole, and the other end is provided with a row of equidistant through holes corresponding to the L-shaped connecting rod holes, namely the columnar connecting rod holes; The positioning pins are respectively inserted into the lifting square positioning column holes, the linkage connection column holes and the columnar connection rod holes when the lifting connection components, the linkage connection columns and the random adjustment connection components change the motion form to the required state.

4. The construction waste primary screening and re-screening machine according to claim 1, characterized in that: The integral chassis comprises walking crawlers symmetrically distributed at the bottom of the integral chassis, a base located at the upper and lower center positions of the integral chassis, a triangular bracket symmetrically distributed at the rear of the base, an arch bridge structure, a material collection box that does not require crushing, a lifting connection column, a bottom conveyor frame fixing column, and a power source arranged between the feed hopper and the articulated column and the fine material conveying mechanism installation groove; the base comprises a material conveying mechanism installation groove that does not require crushing located at the rear of the base, a material conveying mechanism connection hole that does not require crushing located on the left side of the base, a bottom conveying mechanism installation groove located on the base close to the material conveying mechanism installation groove that does not require crushing, a fine material conveying mechanism installation groove located at the front of the base, and a fine material conveying mechanism connection hole located on the right side of the base. Connection hole; the triangular bracket contains a rotating hole for the conveying mechanism of the material to be crushed at the upper position, a hinge hole for the heavy screen bucket at the upper middle position, and a fixing hole for the bottom conveying mechanism at the lower position; the arch bridge structure is located at the upper end of the triangular bracket, connecting the triangular brackets on both sides, extending backward with a left-right symmetrical simply supported beam, and a simply supported beam connecting hole is provided on the simply supported beam; the lifting and connecting columns are symmetrically distributed at the rear position of the fine material conveying mechanism installation groove, the top surface is a beveled surface and is provided with an elliptical hole and a rectangular hole, and the side surface is provided with a through hole, namely the lifting and connecting column hole; the bottom conveying frame fixing column is located between the lifting and connecting column and the triangular bracket, and is symmetrically distributed left-right, and its top position is provided with a bottom conveying frame fixing hole that cooperates with the bottom conveying mechanism.

5. The construction waste primary screening and re-screening machine according to claim 1, characterized in that: The fine material conveying mechanism is located in the middle and front position of the overall chassis, extending to the right, and comprises a fine material conveying roller, a fine material conveying belt, a fine material conveying frame and a fine material collecting box whose inlet width is greater than the width of the bottom conveying mechanism; the rotating shaft of the fine material conveying belt is arranged on both sides of the fine material conveying frame, below the fine material collecting box, and is hinged to the base in the installation groove of the fine material conveying mechanism; the connecting shaft of the fine material conveying belt is arranged on both sides of the fine material conveying frame, close to the middle of the length direction of the fine material conveying frame; The bottom conveying mechanism is located at the rear of the overall chassis, and includes a bottom conveying roller, a bottom conveying belt, a bottom conveying frame and a bottom collecting box; the bottom conveying roller and the two ends of the bottom conveying belt support the bottom conveying belt, and a U-shaped bottom conveying frame is provided at both ends of the bottom conveying belt to surround the bottom conveying roller and the bottom conveying belt, and a bottom collecting box is provided above the U-shaped bottom position, and the side of the U-shaped bottom position is hinged with the fixing hole of the bottom conveying mechanism, and a bottom conveying belt connecting shaft is provided in the middle front position in the length direction of the bottom conveying frame, which cooperates with the fixing hole of the bottom conveying frame to fix the bottom conveying mechanism; The conveying mechanism for materials to be crushed is located at the rearward position of the overall chassis, extending backward, and comprises conveying rollers for materials to be crushed, a conveying belt for materials to be crushed, a conveying frame for materials to be crushed and a collecting box for materials to be crushed; the conveying rollers for materials to be crushed support the conveying belt for materials to be crushed at both ends of the conveying belt for materials to be crushed in the length direction, and U-shaped conveying frames for materials to be crushed are arranged at both ends of the conveying of materials to be crushed, which surround the conveying rollers for materials to be crushed and the conveying belt for materials to be crushed, and a collecting box for materials to be crushed is arranged above the bottom position of the U-shape; the conveying frame for materials to be crushed comprises a lifting and positioning shaft and a connecting shaft for a conveying belt for crushed materials; the lifting and positioning shaft is arranged on both sides of the conveying frame for materials to be crushed, below the collecting box for materials to be crushed, and is hinged to the overall chassis at the rotating hole of the conveying mechanism for materials to be crushed; the connecting shaft for the conveying belt for crushed materials is arranged on both sides of the conveying frame for materials to be crushed, close to the connecting shaft for the conveying belt for materials to be crushed in the middle of the length direction of the conveying frame for materials to be crushed; The conveying mechanism for materials that do not require crushing is located at the rear of the overall chassis, between the conveying mechanism for materials to be crushed and the chassis, and extends to the left side, and includes conveying rollers for materials that do not require crushing, conveying belts for materials that do not require crushing, and conveying frames for materials that do not require crushing; there are three conveying rollers for materials that do not require crushing, two of which are arranged in a collecting box for materials that do not require crushing, and their axial directions are parallel to the longitudinal direction of the base, wherein the conveying roller for materials that do not require crushing on the left side of the base and another conveying roller for materials that do not require crushing are clamped by two conveying frames for materials that do not require crushing; the connecting shafts of the conveying belts for materials that do not require crushing are arranged on both sides of the conveying frames for materials that do not require crushing, close to the middle of the length direction of the conveying frames for materials that do not require crushing.

6. The construction waste primary screening and re-screening machine according to claim 1, characterized in that: The feed hopper matching hinged plate can clamp the feed hopper matching hinged column and be hinged therewith.

7. A construction waste recycling process using the construction waste primary screening and re-screening machine according to any one of claims 1 to 6, comprising the following steps: Recycling: The construction waste removed from the demolition site is loaded as materials and transported back to the work site where the construction waste primary screening machine is located; Primary screening: Turn on the construction waste primary screening machine that has been adjusted on site, and use an excavator to put the recovered materials into the feed hopper one by one; the feed hopper will buffer the impact of these materials when they are put in, and then transport them to the re-screening hopper; the vibration motor drives the re-screening hopper to vibrate, so that the materials can be screened evenly and effectively through the round hole screen and wire screen; After the material enters the heavy screening hopper from the feed hopper, it will move downward along the material channel to be crushed with a certain inclination angle; accompanied by the vibration brought by the vibration motor, the material to be crushed is screened by the circular hole screen, and then enters the material conveying mechanism to be crushed through the guide plate; the remaining material passes through the circular holes of the circular empty screen and enters the material channel that does not need to be crushed, which also has a certain inclination; in the material channel that does not need to be crushed, accompanied by the vibration brought by the vibration motor, the remaining material is divided into material that does not need to be crushed and fine material by the wire screen; the material that does not need to be crushed enters the material conveying mechanism that does not need to be crushed, and the fine material passes through the wire screen and is sent to the fine material conveying mechanism by the bottom conveying mechanism; Crushing: The material to be crushed is crushed by the crusher; Screening: The crushed materials and the materials that do not need to be crushed in step ① enter the aggregate screening process together to separate coarse aggregate and fine aggregate of different particle sizes.

8. The construction waste recycling process according to claim 7, characterized in that: The on-site adjustment of the construction waste primary selection and re-screening machine is to adjust the rising height of the lifting connection components according to the actual situation of the work site, drive the movement of the linkage connection column, and simultaneously adjust the inclination angles of the re-screening bucket and the feed hopper in coordination with each other to ensure that the excavator has sufficient working space in front of the feed hopper; at the same time, adjust the inclination angles of the fine material conveying mechanism, the material conveying mechanism to be crushed, and the material conveying mechanism that does not require crushing relative to the overall chassis to ensure that the materials they convey can be kept at a suitable distance away from the construction waste primary selection and re-screening machine to distinguish the materials; when adjusting the above structure, use random adjustment connection components and positioning pins to fix them respectively.

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