CN112845018A

CN112845018A - Waste material removes sewage device and waste material sieving mechanism for construction

Info

Publication number: CN112845018A
Application number: CN202110000400.2A
Authority: CN
Inventors: 不公告发明人
Original assignee: Dalian Shihuidao Technology Service Co ltd
Current assignee: Jiangsu Jiexia Environmental Protection Technology Co.,Ltd.
Priority date: 2021-01-03
Filing date: 2021-01-03
Publication date: 2021-05-28
Anticipated expiration: 2041-01-03
Also published as: CN112845018B

Abstract

The invention relates to the technical field of building construction waste treatment, in particular to a waste water removing device which comprises an upper layer conveying belt, wherein a material shaking vehicle is arranged below the left side of the upper layer conveying belt, the bottom end of the material shaking vehicle is fixedly connected with a sliding rack, the sliding rack is connected to a pair of guide rail straight plates which are arranged in a bilateral symmetry mode in a sliding mode, the lower end of the sliding rack is meshed with a gear, and the gear is fixed on a first rotating shaft. The device has carried out scrubbing water, dust removal and the dust removal bits to the waste material, utilizes the slope shake effect scrubbing ability reinforce to drum formula screening operation has been carried out again on this basis, the abundant recycle who carries out the waste material.

Description

Waste material removes sewage device and waste material sieving mechanism for construction

Technical Field

The invention relates to the technical field of construction waste treatment, in particular to a waste sewage removing device and a waste screening device for construction.

Background

The building construction refers to production activities in the engineering construction implementation stage, is the construction process of various buildings, and also can be a process of changing various lines on a design drawing into a real object at a specified place. The method comprises foundation engineering construction, main structure construction, roofing engineering construction, decoration engineering construction and the like. The site of the construction work is called a "construction site" or "job site", also called a worksite. The construction waste is the most commonly generated in the construction of buildings, and refers to the general name of dregs, waste concrete, waste bricks and stones and other wastes generated in the production activities of the construction industry such as demolition, construction, decoration, repair and the like. The construction waste can be classified into engineering residue soil, decoration waste, demolition waste, engineering slurry and the like according to the production source; the construction waste can be classified into slag, concrete blocks, broken stone blocks, broken bricks and tiles, waste mortar, slurry, asphalt blocks, waste plastics, waste metals, waste bamboo and wood and the like according to the composition. Waste accumulation can also produce non-recyclable pollution such as sewage, dust, particulate matter and the like, and the waste needs to be removed when being recycled, and the waste itself also needs to be screened for subsequent operation.

The equipment that is used for the waste recycling of building construction field at present can not scrubbing and screening combination use for flow machinery operation links up not in place, and the linkage is not strong, and the availability factor reduces, and its scrubbing effect itself is general, and screening operation is often left out, and waste recycling is low.

Disclosure of Invention

The invention aims to provide a waste screening device for building construction, which aims to solve the problems that the existing waste recycling equipment for the building construction field cannot be used in a combined way of decontamination and screening, so that the operation linkage of the flow machinery is not in place, the linkage is not strong, the use efficiency is reduced, the decontamination effect is general, the screening operation is often omitted, and the waste recycling is low.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a waste material decontamination water installation, includes the upper conveyer belt, upper conveyer belt left side below is equipped with trembles the skip, tremble skip bottom end fixedly connected with slip rack, slip rack sliding connection is on the straight board of guide rail that a pair of bilateral symmetry set up, the meshing of slip rack lower extreme has the gear, the gear is fixed in the first pivot.

As a further scheme of the invention: tremble the skip and include that the opening rectangle form box up, rectangle form box left end is equipped with the gate, the gate upper end articulates in trembleing the skip both sides, the inboard symmetry of gate articulates there are two hydraulic telescoping rod, hydraulic telescoping rod articulates in rectangle form box side, is located rectangle form box bottom is equipped with the triangle-shaped arch, open the rectangle form bottom half of the protruding both sides of triangle-shaped has a plurality of weeping holes of evenly distributed.

As a further scheme of the invention: the sliding rack comprises a rectangular connecting plate, a pair of triangular plates with upward bottom faces are fixedly connected to the left side and the right side of the rectangular connecting plate, a rack is fixed to the lower end of the rectangular box body and is meshed with a gear, fixing columns are arranged in the middle of the two sides of the rack, and shaking assemblies are connected to the left end and the right end of the rack.

As a further scheme of the invention: the shaking component comprises fixed blocks which are fixed on two sides of the rack in a bilateral symmetry mode, fixed rods are fixed on the fixed blocks, blocking heads are arranged at ends of the fixed rods, first springs are sleeved on the fixed rods, movable sleeves are sleeved on the fixed rods between the first springs and the blocking heads, and single-tooth movable blocks are fixedly connected between the movable sleeves.

As a further scheme of the invention: the guide rail straight plates comprise two rectangular straight plates which are obliquely and symmetrically arranged, a gap for the rectangular connecting plate to slide through is reserved between the two rectangular straight plates, symmetrical triangular grooves are formed in the side of the gap of the two rectangular straight plates, and connecting blocks are connected to the lower sides of the left end and the right end of each rectangular straight plate.

As a further scheme of the invention: and the opposite sides of the two connecting blocks are respectively fixed with a second spring, the end of the second spring is fixedly connected with a movable stop block, the bottom of the rectangular straight plate is symmetrically fixed with fixed baffle plates, and the distance between the two fixed baffle plates is equal to the longest distance between the movable stop block at the same side and the shaking assembly.

Waste material sieving mechanism for construction still includes drum-type screening mechanism, drum-type screening mechanism installs on left swash plate and right swash plate, drum-type screening mechanism left side below is equipped with the lower floor conveyer belt, be equipped with the charging box under the drum-type screening mechanism.

As a further scheme of the invention: the drum-type screening mechanism comprises a motor, the motor is connected with a second rotating shaft, a turbine section is arranged on the second rotating shaft, a drum is arranged below the turbine section, a plurality of bar-shaped screening grooves are uniformly distributed in the circumferential direction of an outer ring of the drum, and the bar-shaped screening grooves are meshed with the turbine section.

As a further scheme of the invention: the roller is characterized in that a star-shaped reinforcing rib plate is connected in the roller, a third rotating shaft is sleeved at the center of the star-shaped reinforcing rib plate, a first bevel gear is fixedly connected to the right end of the third rotating shaft, the first bevel gear is meshed with a second bevel gear, and the second bevel gear is fixed on the first rotating shaft.

As a further scheme of the invention: the bearing is arranged inside the left inclined plate and the right inclined plate which are connected through the third rotating shaft, the left inclined plate, the right inclined plate and the roller are inclined to the left by fifteen degrees, and the retainer rings are fixed on the third rotating shaft on the right sides of the left inclined plate and the right inclined plate.

Compared with the prior art, the invention provides a waste screening device for building construction, which is a waste sewage removal device and has the following beneficial effects:

1. according to the waste material decontamination water device, waste materials are conveyed into the material shaking trolley through the upper-layer conveying belt, the sliding rack connected with the material shaking trolley shakes on the guide rail straight plate, so that waste sewage, dust and powder in the material shaking trolley shake off, the sliding rack is matched with the forward rotation of the gear to complete the shaking-off action, and the reverse rotation of the gear is matched with the sliding rack to complete the subsequent material pouring process;

2. according to the waste material sewage removal device, a material shaking vehicle works, a first rotating shaft rotates to drive a gear to rotate forward, then a rack meshed with the gear moves upwards in an inclined mode, then a rectangular connecting plate and a triangular plate slide to the upper right along a triangular groove, and then a material shaking vehicle main body slides to the upper right;

3. according to the waste material decontamination water device, when the rack reaches the rightmost side, the shaking component at the right end of the rack props against the movable stop block at the right end of the guide rail straight plate and extrudes the second spring at the right side, so that the second spring at the right side accumulates force, at the moment, the leftmost end of the rack is just not meshed with the gear, but due to the influence of the accumulated force of the second spring at the right side and the gravity of the shaking trolley, the shaking trolley and the sliding rack can integrally slide towards the lower left side;

4. according to the waste material decontamination water device, when the sliding rack slides to the left lower side for a short distance, the rack is meshed with the gear again, the rack can be knocked by the gear to return to the rightmost position again under the condition of positive rotation of the gear, the gear reciprocates circularly, so that the material shaking vehicle shakes back and forth in the inclined direction, sewage, dust and powder scraps slide to two sides from the triangular protrusions in the shaking process of the waste material, and then the waste material is shaken out from the liquid leakage holes, so that impurities such as sewage are removed;

5. according to the waste material sewage removal device, in the process that a gear knocks a rack, the gear actually knocks a shaking component at the left end of the rack, the shaking component plays a role in buffering to avoid damage to parts caused by direct knocking, a single-tooth movable block on the left side is knocked, then a movable sleeve extrudes a first spring along a fixed rod, the first spring is stressed and compressed, then the first spring extrudes the fixed block, then the rack is stressed to move upwards and rightwards, and the single-tooth movable block has a meshing trend towards the direction of the gear due to the repulsion force of the first spring;

6. this waste material decontamination water installation, the material process principle of falling, after the decontamination process, drive the gear reversal through controlling first pivot, then the gear meshes the shake subassembly rapidly, mesh the rack afterwards, make the rack move to left side below then slide the rack and shake the skip left side and slide, when arriving the leftmost end, the shake subassembly of rack left end supports the left movable dog of guide rail straight plate, and the shake subassembly of rack right-hand member is in half meshing gear state, form a kind of rocking motion equally, the extension of cooperation hydraulic telescopic link this moment, the gate is opened and is carried out the blowing, the residue in the skip that shakes in the blowing in-process can better clearance shake the skip; the two fixed baffles are used for blocking the movement of the fixed column and further preventing the sliding rack from sliding too fast left and right to cause overlarge impact on the second spring and related parts of the second spring;

7. according to the waste screening device for building construction, waste after decontamination is poured into the drum-type screening mechanism for screening, the waste enters from the upper right of the drum-type screening mechanism, a part of large parts are discharged from the lower left corner to a lower layer conveying belt after screening, the other part of small parts are treated in a lower charging box in a centralized manner, and the left inclined plate and the right inclined plate are installed in a way of matching with the inclination angle of the drum-type screening mechanism;

8. according to the waste screening device for building construction, the motor rotates to drive the second rotating shaft, then the turbine section rotates, the turbine section is meshed with the strip-shaped screening groove, then the roller rotates successively, waste materials in the process overturn along with the rotation of the roller, in the process from right to left, small parts leak from the strip-shaped screening groove and fall into the charging box, and the rest parts are discharged from the left side of the roller;

9. according to the waste screening device for building construction, the star-shaped reinforcing rib plate is connected with the roller main body and the third rotating shaft, so that the third rotating shaft can synchronously rotate, then the first bevel gear rotates, then the second bevel gear rotates, and the second bevel gear and the gear share the same first rotating shaft, so that the forward and reverse rotation of the gear depends on the forward and reverse rotation of the motor, and further the linkage effect of devices on two sides is realized;

10. this waste material sieving mechanism for construction, the rotation effect of third pivot has been strengthened to the bearing, hinders to have become fewly, and the retaining ring has prevented the phenomenon that third pivot lower left corner slope removed.

According to the waste screening device for building construction provided by the embodiment of the invention, the waste is subjected to sewage removal, dust removal and powder and scrap removal, the dirt removal capability is strong by utilizing the inclined shaking effect, and the rotary drum type screening operation is performed on the basis, so that the waste is fully recycled.

Drawings

FIG. 1 is a block diagram of a waste sewage disposal apparatus according to an embodiment of the present invention;

FIG. 2 is an enlarged view of the structure of FIG. 1 at A;

FIG. 3 is a cross-sectional view at B-B of FIG. 1;

FIG. 4 is a structural view of a construction waste screening apparatus;

FIG. 5 is an enlarged view of the structure of FIG. 4 at C;

FIG. 6 is a schematic view of the turbine section coupled to the drum.

In the figure: 1. an upper layer conveyor belt; 2. shaking the skip car; 21. a gate; 22. a hydraulic telescopic rod; 23. a triangular protrusion; 24. a weep hole; 25. a rectangular box body; 3. a sliding rack; 31. a rectangular connecting plate; 32. a triangular plate; 33. a rack; 34. fixing a column; 35. a dithering component; 351. a fixed block; 352. fixing the rod; 353. a stopper; 354. a first spring; 355. a movable sleeve; 356. a single-tooth movable block; 4. a guide rail straight plate; 41. a rectangular straight plate; 42. a triangular groove; 43. connecting blocks; 44. a second spring; 45. a movable stop block; 46. fixing a baffle plate; 5. a gear; 6. a first rotating shaft; 7. a drum-type screening mechanism; 71. a motor; 72. a second rotating shaft; 73. a turbine section; 74. a drum; 75. a strip-shaped screening tank; 76. a star-shaped reinforcing rib plate; 77. a third rotating shaft; 78. a first bevel gear; 79. a second bevel gear; 710. a bearing; 711. a retainer ring; 8. a left inclined plate; 9. a right tilt plate; 10. a lower layer conveyor belt; 11. a charging box.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

Example 1:

as shown in fig. 1-3, in an embodiment of the present invention, a waste water removing device includes an upper layer conveyor belt 1, a material shaking vehicle 2 is disposed below the left side of the upper layer conveyor belt 1, a sliding rack 3 is fixedly connected to the bottom end of the material shaking vehicle 2, the sliding rack 3 is slidably connected to a pair of guide rail straight plates 4 symmetrically disposed left and right, a gear 5 is engaged with the lower end of the sliding rack 3, and the gear 5 is fixed on a first rotating shaft 6.

In the embodiment of the invention, waste materials are transported into the material shaking trolley 2 through the upper layer conveying belt 1, the sliding rack 3 connected with the material shaking trolley 2 shakes on the guide rail straight plate 4, so that waste sewage, dust and powder in the material shaking trolley 2 are shaken off, the sliding rack 3 completes shaking-off actions in cooperation with forward rotation of the gear 5, and the gear 5 performs subsequent material pouring processes in cooperation with the sliding rack 3 in reverse rotation.

Example 2:

as shown in fig. 1 to 3, in the embodiment of the present invention, the material shaking vehicle 2 includes a rectangular box 25 with an upward opening, a gate 21 is disposed at a left end of the rectangular box 25, an upper end of the gate 21 is hinged to two sides of the material shaking vehicle 2, two hydraulic telescopic rods 22 are symmetrically hinged to an inner side of the gate 21, the hydraulic telescopic rods 22 are hinged to a side surface of the rectangular box 25, a triangular protrusion 23 is disposed at a bottom end of the rectangular box 25, and a plurality of liquid leaking holes 24 are uniformly distributed at bottoms of the rectangular box 25 on two sides of the triangular protrusion 23.

In the embodiment of the invention, according to the working principle of the material shaking vehicle 2, the first rotating shaft 6 rotates to drive the gear 5 to rotate forward, then the rack 33 meshed with the gear 5 moves obliquely upward, then the rectangular connecting plate 31 and the triangular plate 32 slide to the upper right along the triangular groove 42, and then the main body of the material shaking vehicle 2 slides to the upper right.

Example 3:

as shown in fig. 1 to 3, in the embodiment of the present invention, the sliding rack 3 includes a rectangular connecting plate 31, a pair of triangular plates 32 with bottom surfaces facing upward are fixedly connected to left and right sides of the rectangular connecting plate 31, a rack 33 is fixed to a lower end of the rectangular box 25, the rack 33 engages with the gear 5, a fixing post 34 is disposed at a central position of both sides of the rack 33, and shaking assemblies 35 are connected to both left and right ends of the rack 33.

In the embodiment of the invention, when the rack 33 reaches the rightmost side, the shaking assembly 35 at the right end of the rack 33 abuts against the movable stop 45 at the right end of the guide rail straight plate 4 and presses the second spring 44 at the right side, so that the second spring 44 at the right side accumulates force, and the leftmost end of the rack 33 is just not meshed with the gear 5, but due to the accumulation force of the second spring 44 at the right side and the influence of the gravity of the shaking trolley 2, the shaking trolley 2 and the sliding rack 3 can slide downwards and leftwards integrally.

Example 4:

as shown in fig. 1 to 3, in the embodiment of the present invention, the shaking assembly 35 includes fixed blocks 351 fixed at two sides of the rack 33 in a bilateral symmetry manner, a fixed rod 352 is fixed on the fixed block 351, a stop 353 is provided at an end of the fixed rod 352, a first spring 354 is sleeved on the fixed rod 352, a movable sleeve 355 is sleeved on the fixed rod 352 between the first spring 354 and the stop 353, and a single-tooth movable block 356 is fixedly connected between the two movable sleeves 355.

In the embodiment of the invention, when the sliding rack 3 slides to the left lower side for a short distance, the rack 33 is meshed with the gear 5 again, and under the condition that the gear 5 still rotates forwards, the rack 33 is knocked by the gear 5 to return to the rightmost position again, and the reciprocating motion is realized, so that the material shaking vehicle 2 shakes back and forth in the inclined direction, and in the shaking process of waste materials, sewage, dust and powder scraps slide to two sides from the triangular protrusions 23 and are shaken out from the liquid leakage holes 24, so that impurities such as sewage are removed.

Example 5:

as shown in fig. 1 to 3, in the embodiment of the present invention, the guide rail straight plate 4 includes two rectangular straight plates 41 that are obliquely and symmetrically arranged, a gap for the rectangular connecting plate 31 to slide through is left between the two rectangular straight plates 41, a symmetrical triangular groove 42 is formed on a gap side of the two rectangular straight plates 41, and a connecting block 43 is connected to lower sides of left and right ends of the two rectangular straight plates 41.

In the embodiment of the invention, during the process that the gear 5 strikes the rack 33, actually the gear 5 strikes the shaking assembly 35 at the left end of the rack 33, the shaking assembly 35 plays a role in buffering to avoid damage of parts caused by direct striking, the single-tooth movable block 356 at the left side is struck, then the movable sleeve 355 extrudes the first spring 354 along the fixed rod 352, the first spring 354 is stressed and compressed, then the first spring 354 extrudes the fixed block 351, then the rack 33 is stressed by a force towards the upper right, so that the sliding rack 3 integrally stressed to move towards the upper right, and the single-tooth movable block 356 is stressed by the repulsive force of the first spring 354 and has a meshing tendency towards the direction of the gear 5.

Example 6:

as shown in fig. 1 to 3, in the embodiment of the present invention, a second spring 44 is fixed on each of two opposite sides of the connecting block 43, a movable stop 45 is fixedly connected to an end of the second spring 44, fixed baffles 46 are symmetrically fixed at the bottom of the rectangular straight plate 41, and a distance between the two fixed baffles 46 is equal to a longest distance between the movable stop 45 and the shaking assembly 35 on the same side.

In the embodiment of the invention, the principle of the material pouring process is that after the decontamination process, the first rotating shaft 6 is controlled to drive the gear 5 to rotate reversely, then the gear 5 is rapidly meshed with the shaking component 35, and then the rack 33 is meshed, so that the rack 33 moves towards the lower left side, then the sliding rack 3 and the shaking trolley 2 slide leftwards, when the leftmost end is reached, the shaking component 35 at the left end of the rack 33 is propped against the movable stop block 45 at the left side of the guide rail straight plate 4, and the shaking component 35 at the right end of the rack 33 is in a semi-meshed gear 5 state, and a shaking action is also formed, at the moment, the gate 21 is opened to discharge materials, and the shaking action in the material discharging process can better clean up residues in the shaking trolley 2; the two fixed baffles 46 are used for blocking the movement of the fixed column 34, and then preventing the sliding rack 3 from sliding too fast left and right to cause too much impact on the second spring 44 and related parts of the second spring 44.

Example 7:

as shown in fig. 4-6, the waste screening device for building construction further comprises a drum-type screening mechanism 7, wherein the drum-type screening mechanism 7 is installed on a left inclined plate 8 and a right inclined plate 9, a lower layer conveying belt 10 is arranged below the left side of the drum-type screening mechanism 7, and a charging box 11 is arranged under the drum-type screening mechanism 7.

In the embodiment of the invention, the decontaminated waste materials are poured into the drum type screening mechanism 7 for screening, the waste materials enter from the upper right of the drum type screening mechanism 7, a part of the large parts are discharged from the lower left corner to the lower layer conveyer belt 10 for transportation after being screened, the other part of the small parts are intensively treated in the lower charging box 11, and the left inclined plate 8 and the right inclined plate 9 are installed by matching with the inclined angle of the drum type screening mechanism 7.

Example 8:

as shown in fig. 4 to 6, in the embodiment of the present invention, the drum-type screening mechanism 7 includes a motor 71, the motor 71 is connected to a second rotating shaft 72, a turbine section 73 is disposed on the second rotating shaft 72, a drum 74 is disposed below the turbine section 73, a plurality of strip-shaped screening grooves 75 are uniformly distributed in a circumferential direction of an outer ring of the drum 74, and the strip-shaped screening grooves 75 engage with the turbine section 73.

In the embodiment of the present invention, the motor 71 rotates to drive the second rotating shaft 72, then the turbine section 73 rotates, the turbine section 73 engages with the strip-shaped screening slot 75, then the roller 74 rotates successively, in the process, the waste material turns over along with the rotation of the roller 74, in the process from right to left, small parts leak from the strip-shaped screening slot 75 and fall into the charging box 11, and the rest goes out from the left side of the roller 74.

Example 9:

as shown in fig. 4-6, in the embodiment of the present invention, a star-shaped reinforcing rib plate 76 is connected in the roller 74, a third rotating shaft 77 is sleeved at the center of the star-shaped reinforcing rib plate 76, a first bevel gear 78 is fixedly connected to the right end of the third rotating shaft 77, the first bevel gear 78 is engaged with a second bevel gear 79, and the second bevel gear 79 is fixed on the first rotating shaft 6.

In the embodiment of the invention, the star-shaped reinforcing rib plate 76 connects the main body of the roller 74 and the third rotating shaft 77, so that the third rotating shaft 77 rotates synchronously, then the first bevel gear 78 rotates, then the second bevel gear 79 rotates, and the second bevel gear 79 and the gear 5 are the same as the first rotating shaft 6, so that the forward and reverse rotation of the gear 5 depends on the forward and reverse rotation of the motor 71, and the linkage effect of the two-side device is realized.

Example 10:

as shown in fig. 4 to 6, in the embodiment of the present invention, bearings 710 are disposed inside the left inclined plate 8 and the right inclined plate 9 connected to the third rotating shaft 77, the left inclined plate 8, the right inclined plate 9 and the roller 74 are inclined at fifteen degrees to the left, and a retaining ring 711 is fixed to the third rotating shaft 77 on the right side of the left inclined plate 8 and the right inclined plate 9.

In the embodiment of the present invention, the bearing 710 enhances the rotation effect of the third rotating shaft 77, the obstruction is reduced, and the retaining ring 711 prevents the third rotating shaft 77 from moving obliquely to the lower left corner.

The embodiment of the invention provides a waste screening device for building construction, which carries out sewage removal, dust removal and powder and scrap removal on waste, has strong dirt removal capability by utilizing the inclined shaking effect, and carries out rotary drum type screening operation on the basis, thereby fully recycling the waste.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.

Claims

1. The utility model provides a waste material decontamination water installation, includes upper conveyer belt (1), its characterized in that, upper conveyer belt (1) left side below is equipped with trembles skip (2), tremble skip (2) bottom fixedly connected with slip rack (3), slip rack (3) sliding connection is on the straight board (4) of guide rail that a pair of bilateral symmetry set up, the meshing of slip rack (3) lower extreme has gear (5), gear (5) are fixed in on first pivot (6).

2. The waste water cleaning device according to claim 1, wherein the material shaking vehicle (2) comprises a rectangular box body (25) with an upward opening, a gate (21) is arranged at the left end of the rectangular box body (25), the upper end of the gate (21) is hinged to two sides of the material shaking vehicle (2), two hydraulic telescopic rods (22) are symmetrically hinged to the inner side of the gate (21), the hydraulic telescopic rods (22) are hinged to the side surfaces of the rectangular box body (25), a triangular protrusion (23) is arranged at the bottom end of the rectangular box body (25), and a plurality of liquid leakage holes (24) are uniformly distributed in the bottom of the rectangular box body (25) on two sides of the triangular protrusion (23).

3. The waste water decontamination device according to claim 1, wherein the sliding rack (3) comprises a rectangular connecting plate (31), a pair of triangular plates (32) with upward bottom surfaces are fixedly connected to the left and right sides of the rectangular connecting plate (31), a rack (33) is fixed to the lower end of the rectangular box body (25), the rack (33) is engaged with the gear (5), a fixed column (34) is arranged in the center of each side of the rack (33), and shaking assemblies (35) are connected to the left and right ends of the rack (33).

4. The waste water decontamination device according to claim 3, wherein the shaking assembly (35) comprises fixed blocks (351) fixed at two sides of the rack (33) in bilateral symmetry, fixed rods (352) are fixed on the fixed blocks (351), a blocking head (353) is arranged at the end of each fixed rod (352), a first spring (354) is sleeved on each fixed rod (352), a movable sleeve (355) is sleeved on each fixed rod (352) between the first spring (354) and the blocking head (353), and a single-tooth movable block (356) is fixedly connected between the two movable sleeves (355).

5. The waste water cleaning device according to claim 1, wherein the guide rail straight plate (4) comprises two rectangular straight plates (41) which are obliquely and symmetrically arranged, a gap for the rectangular connecting plate (31) to slide through is reserved between the two rectangular straight plates (41), symmetrical triangular grooves (42) are formed in the gap sides of the two rectangular straight plates (41), and connecting blocks (43) are connected to the lower sides of the left end and the right end of the two rectangular straight plates (41).

6. A waste water cleaning device according to claim 5, characterized in that a second spring (44) is fixed on the opposite side of each of the two connecting blocks (43), a movable stop (45) is fixedly connected to the end of the second spring (44), fixed baffles (46) are symmetrically fixed on the bottom of the rectangular straight plate (41), and the distance between the two fixed baffles (46) is equal to the longest distance between the movable stop (45) on the same side and the shaking assembly (35).

7. The waste screening device for building construction comprises the waste water cleaning device according to any one of claims 1 to 6, and further comprises a drum-type screening mechanism (7), wherein the drum-type screening mechanism (7) is installed on a left inclined plate (8) and a right inclined plate (9), a lower layer conveying belt (10) is arranged below the left side of the drum-type screening mechanism (7), and a charging box (11) is arranged under the drum-type screening mechanism (7).

8. The construction waste screening device according to claim 7, wherein the drum-type screening mechanism (7) comprises a motor (71), the motor (71) is connected with a second rotating shaft (72), a turbine section (73) is arranged on the second rotating shaft (72), a roller (74) is arranged below the turbine section (73), a plurality of strip-shaped screening grooves (75) are uniformly distributed in the circumferential direction of the outer ring of the roller (74), and the strip-shaped screening grooves (75) are meshed with the turbine section (73).

9. The construction waste screening device according to claim 8, wherein star-shaped reinforcing rib plates (76) are connected in the roller (74), a third rotating shaft (77) is sleeved at the center of the star-shaped reinforcing rib plates (76), a first bevel gear (78) is fixedly connected to the right end of the third rotating shaft (77), a second bevel gear (79) is meshed with the first bevel gear (78), and the second bevel gear (79) is fixed on the first rotating shaft (6).

10. The construction waste screening apparatus according to claim 9, wherein bearings (710) are provided inside the left inclined plate (8) and the right inclined plate (9) connected to the third rotating shaft (77), the left inclined plate (8), the right inclined plate (9) and the drum (74) are inclined at fifteen degrees to the left, and a retainer ring (711) is fixed to the third rotating shaft (77) on the right side of the left inclined plate (8) and the right inclined plate (9).