Screening machine for separating construction waste

Abstract

The screening machine comprises a connecting base, a limiting frame is connected to the end face of the connecting base, a two-way moving screening structure is connected to the position, located above the limiting frame, of the end face of the connecting base, and a fluted disc spacing adjustable structure is connected to the two-way moving screening structure. The end face of the connecting base is connected with a herringbone funnel through a connecting box, the side wall of the connecting base is connected with a controller, and the bottom of the limiting frame is provided with a material distributing funnel. Therefore, a driving motor in the bidirectional moving screening structure drives conveying fluted discs to rotate in a reciprocating mode through a transmission structure, the construction waste can rapidly fall into a material distributing hopper from gaps among the multiple sets of conveying fluted discs and is discharged, and then the screening efficiency of the construction waste is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of screening machines, and particularly to a screening machine for separating construction waste. Background Art

[0002] In current modern construction, the usage amount of sand is extremely large. The traditional screening method is mainly manual screening, which is time-consuming and labor-intensive, greatly reducing the production efficiency and screening quality. Subsequently, the emergence of screening machines has, to a large extent, reduced the demand for labor. However, due to their overly simple structure and low technical content, they are prone to damaging the sieve plate and cannot further screen overly small objects, failing to achieve higher production efficiency.

[0003] Currently, in order to reuse waste again, attention has been turned to construction waste. Construction waste generally consists of large stones and small stones, so it is necessary to separate them. When using a construction waste screening machine, screening is often carried out through a single sieve mesh, resulting in low screening efficiency. During screening, due to the short residence time of construction waste in the sieve mesh, the separation of construction waste is not very thorough. Moreover, during screening, the distance between the toothed disks cannot be adjusted, resulting in ineffective control over the size of the screened materials and making it not very convenient to use. Summary of the Invention

[0004] The purpose of the present invention is to provide a screening machine for separating construction waste to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A screening machine for separating construction waste, including a connecting base. A limiting frame is connected to the end face of the connecting base. A bidirectional moving screening structure is connected to the end face of the connecting base and above the limiting frame. A toothed disk spacing adjustable structure is connected to the bidirectional moving screening structure. A herringbone funnel is connected to the end face of the connecting base through a connecting box. A controller is connected to the side wall of the connecting base. A material distribution funnel is arranged at the bottom of the limiting frame; As a preferred embodiment of the present invention, the bidirectional moving screening structure includes a connecting box body, which is connected to the end face of the connecting base through a connecting plate. A driving motor is connected to the end face of the connecting box body through a connecting plate. The driving end of the driving motor is connected to a driving rod through a coupling. A driven bevel gear is meshed and connected to the side wall of the driving rod through a driving bevel gear. A rotating rod is connected to the center of the driven bevel gear. A rotating turntable is connected to the end face of the rotating rod. A rotating dial rod is connected to the end face of the rotating turntable. A moving cross plate is connected above the connecting box body on the rotating dial rod. A plurality of limiting rollers are arranged on the side wall of the moving cross plate. Screening box bodies are connected to both ends of the moving cross plate. Rotating rollers are connected to the bottom of the screening box body and located on the limiting frame. A plurality of connecting rotating rods are connected to the side wall of the screening box body. Rotating gears are alternately connected to the connecting rotating rods. A fixed rack is meshed and connected to the side wall of the rotating gear. The fixed rack is connected to the side wall of the limiting frame through a connecting plate. Connecting rollers are connected to the side wall of the connecting rotating rod and located in the inner cavity of the screening box body. A plurality of conveying tooth discs are alternately connected to the side wall of the connecting roller; As a preferred embodiment of the present invention, the tooth disc spacing adjustable structure includes an adjusting motor, which is connected to the side wall of the screening box body through a connecting seat. The driving end of the adjusting motor is connected to a driving rotating rod through a coupling. Two driving gears are connected to the side wall of the driving rotating rod. A moving rack is meshed and connected to the side wall of the driving gear. An adjusting sliding plate is connected to the side wall of the moving rack. Connecting sliding rails are symmetrically connected to the side wall of the adjusting sliding plate. Connecting sliding blocks are connected in the connecting sliding rails. The connecting sliding blocks are connected to the side wall of the inner cavity of the screening box body. A plurality of guiding sliding grooves are symmetrically opened on the side wall of the adjusting sliding plate. Connecting sliding rods are connected in the guiding sliding grooves. An adjusting dial plate is correspondingly arranged at one end of the connecting sliding rod and the conveying tooth disc. A fixed sliding rod is connected to the adjusting dial plate. The two ends of the fixed sliding rod are connected to the side wall of the inner cavity of the screening box body.

[0006] As a preferred embodiment of the present invention, the driving motor is connected to the controller through a wire and the connection method is electrical connection. The driving rod is connected to the side wall of the connecting box body through a bearing seat, and the connection method between the driving rod and the bearing seat is rotational connection.

[0007] The rotating rod is connected to the end face of the connecting box body through a bearing seat, and the connection method between the rotating rod and the bearing seat is rotational connection. A sliding groove is correspondingly opened on the moving cross plate and corresponding to the rotating dial rod, and the connection method between the rotating dial rod and the sliding groove is sliding connection.

[0008] As a preferred embodiment of the present invention, the limiting roller is connected to the end face of the connecting box body through a bearing, wherein the connecting manner between the limiting roller and the bearing is a rotational connection. A clamping groove is correspondingly formed on the side wall of the limiting roller and corresponds to the moving cross plate, and the matching manner between the moving cross plate and the clamping groove is a clearance fit.

[0009] The rotating roller is rotatably connected to the bottom of the screening box body through a connecting shaft, and the connecting lever is connected to the side wall of the screening box body through a bearing seat, wherein the connecting manner between the connecting lever and the bearing seat is a rotational connection.

[0010] As a preferred embodiment of the present invention, the rotating gears are staggeredly connected to one ends of multiple connecting levers. The bottom of the rotating gear located on the front side of the screening box body is meshed and connected with a fixed rack, and the top of the rotating gear located on the back side of the screening box body is meshed and connected with the fixed rack.

[0011] As a preferred embodiment of the present invention, sliding grooves are correspondingly formed on the outer wall of the connecting roller and correspond to the conveying tooth discs, and the connecting manner between the conveying tooth discs and the sliding grooves is a sliding connection. Multiple J-shaped transmission teeth are formed on the side wall of the conveying tooth disc, and the adjusting motor is connected to the controller through a wire and the connecting manner is an electrical connection.

[0012] As a preferred embodiment of the present invention, the driving rotating rod is connected to the side wall of the screening box body through a bearing seat, wherein the connecting manner between the driving rotating rod and the bearing seat is a rotational connection. A sliding groove is correspondingly formed on the connecting slide rail and corresponds to the connecting slider, and the connecting manner between the connecting slider and the sliding groove is a sliding connection.

[0013] As a preferred embodiment of the present invention, multiple guiding sliding grooves are formed on the side wall of the adjusting sliding plate, and the multiple guiding sliding grooves are symmetrically distributed in pairs on both sides of the driving rotating rod. A sliding groove is correspondingly formed on the adjusting sliding plate and corresponds to the driving rotating rod, and the matching manner between the driving rotating rod and the sliding groove is a clearance fit.

[0014] As a preferred embodiment of the present invention, the matching manner between the guiding sliding groove and the connecting sliding rod is a clearance fit. A clamping groove is correspondingly formed on the side wall of the conveying tooth disc and corresponds to the adjusting dial plate, and the matching manner between the adjusting dial plate and the clamping groove is a clearance fit. A connecting hole is correspondingly formed on the adjusting dial plate and corresponds to the fixed sliding rod, and the connecting manner between the fixed sliding rod and the connecting hole is a sliding connection.

[0015] In the bidirectional moving screening structure of the present invention, the driving motor drives two groups of screening boxes to reciprocate on the limiting frame through a transmission structure. When the screening boxes move, the fixed rack drives the rotating gear to rotate, the rotating gear drives the connecting rotating rod to rotate, and the connecting rotating rod drives the connecting roller and the conveying tooth disc to reciprocate, enabling construction waste to quickly fall into the feeding funnel through the gaps between multiple groups of conveying tooth discs and be discharged, thereby improving the efficiency of screening construction waste.

[0016] In the unidirectional moving screening structure of the present invention, the driving motor drives the conveying tooth disc to reciprocate through a transmission structure. Under the action of multiple groups of J-shaped transmission teeth arranged on the side wall of the conveying tooth disc, when the conveying tooth disc reciprocates, it can drive the slag to move forward, enabling larger construction waste to be discharged from the other end of the screening box. Moreover, the rotating gears are staggeredly connected to one end of multiple groups of connecting rotating rods. Among them, the bottom of the rotating gear located on the front side of the screening box is meshed and connected to the fixed rack, and the top of the rotating gear located on the back side of the screening box is meshed and connected to the fixed rack. Under this action, when the conveying tooth disc reciprocates, it can intermittently convey the slag forward, increasing the residence time of the construction waste in the screening box and improving the screening effect of the slag.

[0017] In the tooth disc spacing adjustable structure of the present invention, the adjusting motor drives the adjusting dial to move equidistantly on the side wall of the fixed sliding rod through a transmission structure, thereby equidistantly adjusting the distance between multiple groups of conveying tooth discs, changing the gap between the conveying tooth discs, enabling the device to meet the screening requirements of construction waste of different sizes, and improving the application range of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic isometric structure view of the present invention; Figure 2 is Figure 1 the sectional structure view of Figure 3 is a schematic structure view of the bidirectional moving screening structure of the present invention; Figure 4 is Figure 3 the partial structure view of Figure 5 is Figure 4 the partial structure view of Figure 6 is Figure 5 the internal structure view of Figure 7 is a schematic structure view of the tooth disc spacing adjustable structure of the present invention; Figure 8 is Figure 7 the partial structure view of Figure 9 is Figure 8 the partial structure view of

[0019] In the figure: 1. Connecting base; 2. Limiting frame; 3. Bidirectional moving screening structure; 4. Tooth disc pitch adjustable structure; 5. V-shaped funnel; 6. Controller; 7. Feeding funnel; 301. Connecting box body; 302. Driving motor; 303. Driving rod; 304. Driving helical gear; 305. Driven helical gear; 306. Rotating rod; 307. Rotating turntable; 308. Rotating dial rod; 309. Moving cross plate; 310. Limiting roller; 311. Screening box body; 312. Rotating roller; 313. Connecting rotating rod; 314. Rotating gear; 315. Fixed rack; 316. Connecting roller; 317. Conveyor tooth disc; 401. Adjusting motor; 402. Driving rotating rod; 403. Driving gear; 404. Moving rack; 405. Adjusting slide plate; 406. Connecting slide rail; 407. Connecting slider; 408. Guide chute; 409. Connecting slide bar; 410. Adjusting dial; 411. Fixed slide bar. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] For the embodiments, please refer to Figures 1-9 The present invention provides a technical solution: A screening machine for separating construction waste includes a connecting base 1. A limiting frame 2 is connected to the end face of the connecting base 1. A bidirectional moving screening structure 3 is connected to the end face of the connecting base 1 and above the limiting frame 2. A tooth disc pitch adjustable structure 4 is connected to the bidirectional moving screening structure 3. A V-shaped funnel 5 is connected to the end face of the connecting base 1 through a connecting box. A controller 6 is connected to the side wall of the connecting base 1. A feeding funnel 7 is arranged at the bottom of the limiting frame 2.

[0022] In this embodiment, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6, the bidirectional moving screening structure 3 includes a connecting box body 301. The connecting box body 301 is connected to the end face of the connecting base 1 through a connecting plate. A driving motor 302 is connected to the end face of the connecting box body 301 through a connecting plate. The driving end of the driving motor 302 is connected to a driving rod 303 through a coupling. A driven helical gear 305 is meshed and connected to the side wall of the driving rod 303 through a driving helical gear 304. A rotating rod 306 is connected to the center of the driven helical gear 305. A rotating turntable 307 is connected to the end face of the rotating rod 306. A rotating dial rod 308 is connected to the end face of the rotating turntable 307. A moving cross plate 309 is connected above the connecting box body 301 on the rotating dial rod 308. Multiple groups of limiting rollers 310 are arranged on the side wall of the moving cross plate 309. Screening box bodies 311 are connected to both ends of the moving cross plate 309. Rotating rollers 312 are connected to the bottom of the screening box bodies 311 and are located on the limiting frame 2. Multiple groups of connecting rotating rods 313 are connected to the side walls of the screening box bodies 311. Rotating gears 314 are alternately connected to the connecting rotating rods 313. A fixed rack 315 is meshed and connected to the side wall of the rotating gear 314. The fixed rack 315 is connected to the side wall of the limiting frame 2 through a connecting plate. Connecting rollers 316 are connected to the side walls of the connecting rotating rods 313 and are located in the inner cavity of the screening box bodies 311. Multiple groups of conveying tooth discs 317 are alternately connected to the side walls of the connecting rollers 316.

[0023] Based on the above structure and the conditions of the connection relationship of the above structure, by controlling the driving motor 302 to operate through the controller 6, when the driving end of the driving motor 302 rotates, it drives the driving rod 303, the driving helical gear 304, the driven helical gear 305, the rotating rod 306, the rotating turntable 307 and the rotating dial rod 308 to rotate in sequence. When the rotating dial rod 308 rotates, it drives the two screening box bodies 311 to reciprocate on the limiting frame 2 through the moving cross plate 309. When the screening box bodies 311 move, it drives the rotating gears 314, the connecting rotating rods 313, the connecting rollers 316 and the conveying tooth discs 317 to reciprocate and rotate through the fixed rack 315, so as to carry out the screening work of the materials.

[0024] The driving motor 302 is connected to the controller 6 through a wire and the connection method is electrical connection, and the operation of the driving motor 302 can be controlled through the controller 6.

[0025] The drive rod 303 is connected to the side wall of the connecting box body 301 through a bearing seat. The connection mode between the drive rod 303 and the bearing seat is a rotational connection. The rotating rod 306 is connected to the end face of the connecting box body 301 through a bearing seat. The connection mode between the rotating rod 306 and the bearing seat is a rotational connection. A sliding groove is correspondingly formed on the moving cross plate 309 and is corresponding to the rotating lever 308. The connection mode between the rotating lever 308 and the sliding groove is a sliding connection. The limiting roller 310 is connected to the end face of the connecting box body 301 through a bearing. The connection mode between the limiting roller 310 and the bearing is a rotational connection. A clamping groove is correspondingly formed on the side wall of the limiting roller 310 and is corresponding to the moving cross plate 309. The matching mode between the moving cross plate 309 and the clamping groove is a clearance fit. When the drive rod 303 rotates, it can drive the moving cross plate 309 to reciprocate left and right; The rotating roller 312 is rotationally connected to the bottom of the screening box body 311 through a connecting shaft. The connecting rotating rod 313 is connected to the side wall of the screening box body 311 through a bearing seat. The connection mode between the connecting rotating rod 313 and the bearing seat is a rotational connection. When the moving cross plate 309 reciprocates left and right, under the action of the rotating roller 312 at the same time, it can drive the screening box body 311 to reciprocate; The rotating gears 314 are staggeredly connected to one ends of multiple groups of connecting rotating rods 313. The bottom of the rotating gear 314 located on the front of the screening box body 311 is meshed and connected with the fixed rack 315. The top of the rotating gear 314 located on the back of the screening box body 311 is meshed and connected with the fixed rack 315. When the conveying tooth disc 317 reciprocates, it can intermittently convey the slag forward and improve the screening effect of the slag; A sliding groove is correspondingly formed on the outer wall of the connecting roller 316 and is corresponding to the conveying tooth disc 317. The connection mode between the conveying tooth disc 317 and the sliding groove is a sliding connection, and the distance between each group of conveying tooth discs 317 can be adjusted; Multiple groups of J-shaped transmission teeth are formed on the side wall of the conveying tooth disc 317. When the conveying tooth disc 317 reciprocates, it can drive the slag to move forward; In this embodiment, refer to Figure 1 、 Figure 2 、 Figure 7 、 Figure 8 and Figure 9, the tooth disc spacing adjustable structure 4 includes an adjustment motor 401. The adjustment motor 401 is connected to the side wall of the screening box body 311 through a connecting seat. The driving end of the adjustment motor 401 is connected with a driving rotating rod 402 through a coupling. Two groups of driving gears 403 are connected to the side wall of the driving rotating rod 402. A moving rack 404 is meshed and connected to the side wall of the driving gear 403. An adjustment sliding plate 405 is connected to the side wall of the moving rack 404. Two connecting sliding rails 406 are symmetrically connected to the side wall of the adjustment sliding plate 405. A connecting slider 407 is connected in the connecting sliding rail 406. The connecting slider 407 is connected to the side wall of the inner cavity of the screening box body 311. A plurality of groups of guiding sliding grooves 408 are symmetrically formed in the side wall of the adjustment sliding plate 405. A connecting sliding rod 409 is connected in the guiding sliding groove 408. An adjustment dial 410 is correspondingly arranged at one end of the connecting sliding rod 409 and opposite to the conveying tooth disc 317. A fixed sliding rod 411 is connected to the adjustment dial 410. Both ends of the fixed sliding rod 411 are connected to the side wall of the inner cavity of the screening box body 311.

[0026] Based on the above structure and the connection relationship of the above structure, when the adjustment motor 401 is controlled to operate by the controller 6, when the driving end of the adjustment motor 401 rotates, it drives the driving rotating rod 402 and the driving gear 403 to rotate in sequence. When the driving gear 403 rotates, it drives the adjustment sliding plate 405 to move up and down through the moving rack 404. When the adjustment sliding plate 405 moves, it drives the adjustment dial 410 to move equidistantly on the side wall of the fixed sliding rod 411 through the connecting sliding rod 409 in the guiding sliding groove 408. When the adjustment dial 410 moves equidistantly on the side wall of the fixed sliding rod 411, the distance between multiple groups of conveying tooth discs 317 is adjusted equidistantly.

[0027] The adjusting motor 401 is connected to the controller 6 through a wire and the connection method is electrical connection, and the operation of the adjusting motor 401 can be controlled by the controller 6; the driving rotating rod 402 is connected to the side wall of the screening box body 311 through a bearing seat, and the connection method between the driving rotating rod 402 and the bearing seat is a rotating connection. The connecting slide rail 406 is provided with a chute corresponding to the connecting slider 407, and the connection method between the connecting slider 407 and the chute is a sliding connection. A plurality of guiding chutes 408 are provided on the side wall of the adjusting slide plate 405, and the plurality of guiding chutes 408 are symmetrically distributed in pairs on both sides of the driving rotating rod 402. The adjusting slide plate 405 is provided with a chute corresponding to the driving rotating rod 402, and the cooperation method between the driving rotating rod 402 and the chute is a clearance fit. The cooperation method between the guiding chute 408 and the connecting slide rod 409 is a clearance fit. The side wall of the conveying gear disk 317 is provided with a clamping groove corresponding to the adjusting dial 410, and the cooperation method between the adjusting dial 410 and the clamping groove is a clearance fit. The adjusting dial 410 is provided with a connecting hole corresponding to the fixed slide rod 411, and the connection method between the fixed slide rod 411 and the connecting hole is a sliding connection. When the driving rotating rod 402 rotates, the distance between the conveying gear disks 317 on the adjusting dial 410 can be adjusted at equal intervals.

[0028] When using the screening machine for separating construction waste, first connect the device to the power supply to make the device in a working state. Control the operation of the adjusting motor 401 through the controller 6. When the driving end of the adjusting motor 401 rotates, it drives the driving rotating rod 402 to rotate. The driving rotating rod 402 drives the driving gear 403 to rotate. When the driving gear 403 rotates, it drives the adjusting slide plate 405 to move up and down through the moving rack 404. When the adjusting slide plate 405 moves, it drives the adjusting dial 410 to move equidistantly on the side wall of the fixed slide rod 411 through the connecting slide rod 409 in the guiding chute 408. When the adjusting dial 410 moves equidistantly on the side wall of the fixed slide rod 411, the distance between the plurality of conveying gear disks 317 can be adjusted at equal intervals, so that the gap between the conveying gear disks 317 meets the requirements for screening construction waste.

[0029] Afterwards, the mobile phone scatters the construction waste into the inner cavities of the two groups of screening boxes 311 through the herringbone funnel 5, and then controls the driving motor 302 to operate through the controller 6. When the driving end of the driving motor 302 rotates, it drives the driving rod 303 to rotate. The driving rod 303 drives the driving bevel gear 304 to rotate. The driving bevel gear 304 drives the driven bevel gear 305 to rotate. The driven bevel gear 305 drives the rotating rod 306 to rotate. The rotating rod 306 drives the rotating turntable 307 and the rotating lever 308 to rotate. When the rotating lever 308 rotates, it drives the two groups of screening boxes 311 to reciprocate on the limiting frame 2 through the moving cross plate 309. When the screening box 311 moves, it drives the rotating gear 314 to rotate through the fixed rack 315. The rotating gear 314 drives the connecting rotating rod 313 to rotate. The connecting rotating rod 313 drives the connecting roller 316 and the conveying tooth disc 317 to reciprocate, so that the construction waste can quickly fall into the feeding funnel 7 through the gaps between the multiple groups of conveying tooth discs 317 and be discharged.

[0030] At the same time, a plurality of J-shaped transmission teeth are provided on the side wall of the conveying tooth disc 317. When the conveying tooth disc 317 reciprocates, it can drive the slag to move forward, so that the larger construction waste can be discharged from the other end of the screening box 311. And the rotating gear 314 is staggeredly connected to one end of the multiple groups of connecting rotating rods 313. The bottom of the rotating gear 314 located in the front of the screening box 311 is meshed with the fixed rack 315, and the top of the rotating gear 314 located in the back of the screening box 311 is meshed with the fixed rack 315. When the conveying tooth disc 317 reciprocates, it can intermittently convey the slag forward, increasing the residence time of the construction waste in the screening box 311 and improving the screening effect of the slag.

[0031] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screening machine for separating construction waste, comprising a connecting base (1), characterized in that: A limiting frame (2) is connected to the end face of the connecting base (1). Above the limiting frame (2) on the end face of the connecting base (1), a two-way moving screening structure (3) is connected. A tooth disc pitch adjustable structure (4) is connected to the two-way moving screening structure (3). A herringbone funnel (5) is connected to the end face of the connecting base (1) through a connecting box. A controller (6) is connected to the side wall of the connecting base (1). A feeding funnel (7) is arranged at the bottom of the limiting frame (2).

2. The screening machine for separating construction waste according to claim 1, wherein: The two-way moving screening structure (3) includes a connecting box body (301). The connecting box body (301) is connected to the end face of the connecting base (1) through a connecting plate. A driving motor (302) is connected to the end face of the connecting box body (301) through a connecting plate. The driving end of the driving motor (302) is connected to a driving rod (303) through a coupling. A driving bevel gear (304) is meshed and connected to a driven bevel gear (305) on the side wall of the driving rod (303). A rotating rod (306) is connected to the center of the driven bevel gear (305). A rotating turntable (307) is connected to the end face of the rotating rod (306). A rotating shifting rod (308) is connected to the end face of the rotating turntable (307). Above the connecting box body (301), a moving cross plate (309) is connected to the rotating shifting rod (308). A plurality of limiting rollers (310) are arranged on the side wall of the moving cross plate (309). Screening box bodies (311) are connected to both ends of the moving cross plate (309). Rotating rollers (312) are connected to the bottom of the screening box bodies (311) and are located on the limiting frame (2). A plurality of connecting rotating rods (313) are connected to the side walls of the screening box bodies (311). Rotating gears (314) are cross-connected to the connecting rotating rods (313). Fixed racks (315) are meshed and connected to the side walls of the rotating gears (314). The fixed racks (315) are connected to the side walls of the limiting frame (2) through connecting plates. Connecting rollers (316) are connected to the side walls of the connecting rotating rods (313) and are located in the inner cavities of the screening box bodies (311). A plurality of conveying tooth discs (317) are cross-connected to the side walls of the connecting rollers (316).

3. The screening machine for separating construction waste according to claim 2, wherein: The adjustable structure for the spacing of the toothed discs (4) includes an adjusting motor (401). The adjusting motor (401) is connected to the side wall of the screening box body (311) through a connecting seat. The driving end of the adjusting motor (401) is connected with a driving rotating rod (402) through a coupling. Two groups of driving gears (403) are connected to the side wall of the driving rotating rod (402). A moving rack (404) is meshed and connected to the side wall of the driving gear (403). An adjusting slide plate (405) is connected to the side wall of the moving rack (404). Two connecting slide rails (406) are symmetrically connected to the side wall of the adjusting slide plate (405). A connecting slider (407) is connected in the connecting slide rail (406). The connecting slider (407) is connected to the side wall of the inner cavity of the screening box body (311). A plurality of guiding chute grooves (408) are symmetrically formed in the side wall of the adjusting slide plate (405). A connecting slide rod (409) is connected in the guiding chute groove (408). An adjusting dial plate (410) is arranged at one end of the connecting slide rod (409) corresponding to the conveying toothed disc (317). A fixed slide rod (411) is connected to the adjusting dial plate (410). Both ends of the fixed slide rod (411) are connected to the side wall of the inner cavity of the screening box body (311).

4. A screening machine for separating construction waste according to claim 3, characterized in that: The driving motor (302) is connected to the controller (6) through a wire and the connection method is electrical connection. The driving rod (303) is connected to the side wall of the connecting box body (301) through a bearing seat. The connection method between the driving rod (303) and the bearing seat is rotational connection; The rotating rod (306) is connected to the end face of the connecting box body (301) through a bearing seat. The connection method between the rotating rod (306) and the bearing seat is rotational connection. A chute is formed on the moving cross plate (309) corresponding to the rotating dial rod (308). The connection method between the rotating dial rod (308) and the chute is sliding connection.

5. A screening machine for separating construction waste according to claim 3, characterized in that: The limiting roller (310) is connected to the end face of the connecting box body (301) through a bearing. The connection method between the limiting roller (310) and the bearing is rotational connection. A clamping groove is formed on the side wall of the limiting roller (310) corresponding to the moving cross plate (309). The matching method between the moving cross plate (309) and the clamping groove is clearance fit; The rotating roller (312) is rotationally connected to the bottom of the screening box body (311) through a connecting shaft. The connecting rotating rod (313) is connected to the side wall of the screening box body (311) through a bearing seat. The connection method between the connecting rotating rod (313) and the bearing seat is rotational connection.

6. A screening machine for separating construction waste according to claim 3, characterized in that: The rotating gears (314) are staggeredly connected to one ends of a plurality of connecting rotating rods (313). The bottom of the rotating gear (314) located on the front side of the screening box body (311) is meshed and connected with the fixed rack (315). The top of the rotating gear (314) located on the back side of the screening box body (311) is meshed and connected with the fixed rack (315).

7. A screening machine for separating construction waste according to claim 3, characterized in that: On the outer wall of the connecting roller (316) and corresponding to the conveying gear disc (317), a sliding groove is provided. The connection mode between the conveying gear disc (317) and the sliding groove is a sliding connection. On the side wall of the conveying gear disc (317), multiple groups of J-shaped transmission teeth are provided. The adjusting motor (401) is connected to the controller (6) through a wire, and the connection mode is an electrical connection.

8. A screening machine for separating construction waste according to claim 3, characterized in that: The driving rotating rod (402) is connected to the side wall of the screening box body (311) through a bearing seat. The connection mode between the driving rotating rod (402) and the bearing seat is a rotating connection. On the connecting slide rail (406) and corresponding to the connecting slider (407), a sliding groove is provided. The connection mode between the connecting slider (407) and the sliding groove is a sliding connection.

9. A screening machine for separating construction waste according to claim 3, characterized in that: On the side wall of the adjusting slide plate (405), multiple groups of guiding sliding grooves (408) are provided. Among them, the multiple groups of guiding sliding grooves (408) are symmetrically distributed in pairs on both sides of the driving rotating rod (402). On the adjusting slide plate (405) and corresponding to the driving rotating rod (402), a sliding groove is provided. The matching mode between the driving rotating rod (402) and the sliding groove is a clearance fit.

10. A screening machine for separating construction waste according to claim 3, characterized in that: The matching mode between the guiding sliding groove (408) and the connecting sliding rod (409) is a clearance fit. On the side wall of the conveying gear disc (317) and corresponding to the adjusting dial (410), a clamping groove is provided. The matching mode between the adjusting dial (410) and the clamping groove is a clearance fit. On the adjusting dial (410) and corresponding to the fixed slide rod (411), a connecting hole is provided. The connection mode between the fixed slide rod (411) and the connecting hole is a sliding connection.

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