CN112138768A - An energy-saving and environmentally friendly crushing device for construction engineering - Google Patents

Abstract

The invention relates to the technical field of crushing, in particular to an energy-saving and environment-friendly crushing device for constructional engineering. Including casing, first annular filter screen area, first broken subassembly, second annular filter screen area, the broken subassembly of second and go out the material area, be provided with first transmission and the second transmission of arranging from top to bottom in the casing, two filter screen areas rotate along opposite direction under transmission's drive, and two filter screen areas upper portion tensioning, lower part relax, and set up along opposite direction slope. The material is firstly screened and filtered by a first annular filter screen belt and then enters a first crushing assembly to be crushed at a first stage; the materials after the coarse screening and the primary crushing are screened by a second annular filter screen belt and then enter a second crushing assembly for secondary crushing; through the crushing process combining the screening, crushing and grading crushing, the phenomenon of over grinding caused by crushing qualified materials again is avoided, the screening effect and the reasonable utilization rate of equipment are improved, and the crushing process is energy-saving and environment-friendly.

Description

An energy-saving and environmentally friendly crushing device for construction engineering

technical field

The invention relates to the technical field of crushing, in particular to a crushing device for energy-saving and environment-friendly construction projects.

Background technique

The function of the crushing device is to decompose the large particle materials into small particle materials that meet the required particle size by means of extrusion, rolling, beating, vibration, etc., so as to meet the needs of production and life. Most of the existing crushing process adopts the method of grading crushing. First, the material is roughly crushed by the crusher, and then the roughly crushed material is put into the coarse-toothed roller crusher for crushing, and then the material is put into the fine-toothed roller crusher. It is crushed to finally obtain the required fine particle material. After the material is roughly crushed, although the particle size of most materials is still relatively large, the particle size of a small part of the material has already met the discharge standard. , wasting energy.

The Chinese patent with the application number: 201510223005.5 and the authorization announcement number: CN 104826694 B discloses a multifunctional stone crusher, which includes a crushing chamber and a crushing chamber. Selecting device and adsorption device to realize the separation of particulate matter and stone powder and improve crushing efficiency. However, the stone crusher directly puts the material into the crushing chamber for crushing, and the crushed material directly enters the crushing chamber for crushing. Without subdivision processing according to the condition of the material, there will still be over-grinding.

SUMMARY OF THE INVENTION

According to at least one deficiency of the prior art, the present invention proposes an energy-saving and environment-friendly crushing device for construction engineering, so as to solve the problems of low equipment utilization and resource utilization caused by over-crushing and over-grinding in the existing crushing device. A serious problem of waste.

An energy-saving and environment-friendly building engineering crushing device of the present invention adopts the following technical solutions: including:

The casing is provided with a feeding opening on the right side of the upper end, and a first transmission device and a second transmission device arranged up and down are arranged in the casing;

The first annular filter mesh belt is installed on the first transmission device to receive the material from the feeding port, and rotates clockwise under the driving of the first transmission device, and the first transmission device makes The first annular screen belt is inclined at a low left and a high right, and the first annular screen belt has a tensioned first upper section and a relaxed first lower section below the first upper section section, so that after the material is screened by the first upper section, part of the material falls from the left end of the first upper section, and the rest of the material passes through the first upper section, and the first lower section makes the rest of the material at least partially gathers in the left section of the first lower section and falls through the first lower section;

a first crushing assembly configured to receive and crush material falling from the left end of the first upper section;

A second annular filter belt is located below the first annular filter belt and the first crushing component to receive the materials screened by the first annular filter belt and the first crushing component The crushed material, the second annular filter belt is installed on the second transmission device, and rotates counterclockwise under the driving of the second transmission device, the second transmission device makes the second annular The filter mesh belt is arranged at a high left and right low slope, and the second-shaped mesh belt has a tensioned second upper section and a relaxed second lower section below the second upper section;

a second crushing assembly configured to receive and crush material falling from the right end of the second upper section; and

A discharge belt, which is arranged at the bottom of the casing, is used to output the screened and crushed materials.

Optionally, the first transmission device includes:

A rotating assembly, the rotating assembly includes a first rotating column and a second rotating column that are rotatably connected in the housing and whose axes extend in the horizontal direction, the first rotating column is located above the second rotating column, so The first annular filter mesh belt is arranged on the first rotating column and the second rotating column;

a transmission gear, the axis of which extends in the horizontal direction, and there are four transmission gears, which are respectively fixedly connected to both ends of the first rotating column and the second rotating column; and

There are two power transmission members, which are respectively fixed and wound on the front and rear sides of the first annular filter belt. The power transmission member is engaged with the transmission gear to drive the transmission gear driven by the transmission gear the first annular filter belt rotates;

The structure of the second transmission device is the same as that of the first transmission device.

Optionally, the first transmission device further includes two vertical guide plates and two arc-shaped guide plates, the vertical guide plates are located at the exit side of the first rotating column, and the arc-shaped guide plates On the winding-in side of the first rotating column, the arc-shaped guide plate is arched toward the vertical guide plate, and the first upper section passes through a guide channel between the two arc-shaped guide plates , the first lower section passes through a guide channel between the two vertical guide plates.

Optionally, the first crushing assembly includes:

a rough-grinding toothed roller, the axis of which extends in a horizontal direction and is rotatably connected to the casing, two of the rough-grinding toothed rollers are arranged in parallel, and the rotation directions of the two rough-grinding toothed rollers are opposite; and

A first material guide assembly, which is fixedly connected to the casing, the upper end of the first material guide assembly is located below the left end of the first upper section, and the lower end of the first material guide assembly is narrowed and located at Above the grinding place of the two rough grinding rollers.

Optionally, the second crushing assembly includes:

a fine-grinding toothed roller, the axis of which extends in a horizontal direction and is rotatably connected to the casing, two of the fine-grinding toothed rollers are arranged in parallel, and the rotation directions of the two fine-grinding toothed rollers are opposite; and

A second material guide assembly, which is fixedly connected to the casing, the upper end of the second material guide assembly is located below the right end of the second upper section, and the lower end of the second material guide assembly is narrowed and located at Above the grinding place of the two said finely ground toothed rollers.

Optionally, both the first material guide assembly and the second material guide assembly include:

a first guide plate, which is fixedly connected with the side wall of the casing, and the lower end of the first guide plate of the first material guide assembly is inclined to the grinding place of the two rough grinding rollers, the second The lower end of the first guide plate of the material guide assembly is inclined to the grinding place of the two fine grinding toothed rollers;

The second guide plate is fixedly connected with the first guide plate, and the lower end of the second guide plate of the first material guide assembly is inclined to the grinding place of the two rough grinding rollers, the second guide plate The lower end of the second guide plate of the material assembly is inclined to the grinding place of the two fine grinding toothed rollers;

a plurality of struts spaced between the housing and the first guide plate to support the first guide plate;

A plurality of connecting posts are arranged at intervals between the first guide plate and the second guide plate, so as to fixedly connect the second guide plate and the first guide plate.

Optionally, the power transmission member is a timing belt.

Optionally, the power transmission member is a chain.

Optionally, a side of the chain close to the first annular filter belt or the second annular filter belt is provided with a plurality of groups of filter screen clamps at intervals along the extension direction of the chain, and each group of the The filter screen holder includes two filter screen holding plates, and the edge of the first annular filter belt or the second annular filter belt is arranged between the two filter screen holding plates. Each of the filter screen holding plates and the first annular filter screen belt or the second annular filter screen belt are fixedly connected through a filter screen fixing column.

Optionally, the first rotating column, the second rotating column and the discharge belt are all connected with a crawler motor, and both the coarse grinding gear roller and the fine grinding gear roller are connected with a crushing motor.

The beneficial effects of the present invention are as follows: the present invention will firstly screen and filter the material input into the discharge port through the first annular filter belt, and then enter the first crushing component for primary crushing; the material after coarse screening and primary crushing After being screened by the second annular filter belt, it enters the second crushing component for secondary crushing. Through the crushing process of first screening, then crushing and grading crushing, the phenomenon of over-grinding caused by the re-crushing of qualified materials is avoided, the screening effect and the reasonable utilization of equipment are improved, and the energy saving and environmental protection are realized.

The present invention adopts a hierarchical installation method in which the first annular filter belt and the second annular filter belt are installed up and down and relatively obliquely arranged. The lower part of the belt naturally forms a mesh pocket at the low point, and the material naturally slides down to the mesh pocket during the screening process, so that the discharge point of the qualified material after the previous level of sieving is always at the high point of the next level filter mesh belt. Improve the transportation distance of the material on the filter belt, thereby ensuring the screening time of the material on the screen belt, and avoid the material falling to the crushing component if the screening distance is too short. Grinding phenomenon, saving space and further improving the sieving effect and sieving efficiency.

In the present invention, the lower part of the filter mesh belt is loosely arranged, and the falling of the material will increase the vibration amplitude of the first lower section and the second lower section, and further improve the screening effect.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor. Those skilled in the art should understand that these drawings may not necessarily is drawn to scale.

Fig. 1 is the structural representation of a kind of energy-saving and environment-friendly construction engineering crushing device of the present invention;

Fig. 2 is a three-dimensional cross-sectional structural view of a crushing device for energy-saving and environment-friendly construction projects of the present invention;

Fig. 3 is a partial enlarged view at A in Fig. 2;

Fig. 4 is a partial enlarged view at B in Fig. 2;

Fig. 5 is a partial enlarged view at C in Fig. 1;

Fig. 6 is a partial enlarged view at D in Fig. 1;

Figure 7 is a sectional view at A-A in Figure 1;

Fig. 8 is an enlarged view at E in Fig. 7;

Fig. 9 is a three-dimensional structural schematic diagram of an energy-saving and environment-friendly construction project crusher according to the present invention;

Fig. 10 is a partial enlarged view at F in Fig. 9;

11 is a schematic structural diagram of a chain-type power transmission member in the present invention;

FIG. 12 is a partial enlarged view of G in FIG. 11 .

In the figure: 11, shell; 12, discharge port; 13, discharge belt; 14, crawler motor; 15, crushing motor; 20, power conveying part; 21, first annular filter belt; 22, second annular Filter belt; 211, filter hole; 30, first guide assembly; 31, first guide plate; 32, second guide plate; 33, pillar; 34, connecting column; 41, first rotating column; 42, thick gear grinding roller; 43, fine grinding gear roller; 44, transmission gear; 45, second rotating column; 50, arc guide plate; 51, vertical guide plate; 61, chain plate; 62, hinge column; 63, filter Mesh fixing column; 64. Filter mesh holding plate.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of 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.

As shown in FIGS. 1 to 12 , an energy-saving and environment-friendly construction engineering crushing device of the present invention includes a casing 11 , a first annular filter belt 21 , a first crushing component, a second annular filter belt 22 , a Two crushing components and a discharge belt 13 . A discharge port 12 is provided on the right side of the upper end of the casing 11 , and a first transmission device and a second transmission device arranged up and down are arranged in the casing 11 .

The first annular filter belt 21 is installed on the first transmission device to receive the material from the feeding port 12, and rotates clockwise under the driving of the first transmission device. The first transmission device makes the first annular filter belt 21 left. Low right high inclination setting and making the first endless screen belt 21 have a first upper section that is tensioned and a first lower section that is slack below the first upper section to allow material to pass through the first upper section After section sieving, part of the material falls from the left end of the first upper section, and the rest of the material passes through the first upper section, and the first lower section makes at least part of the rest of the material in the first lower section. The left section gathers and falls through the first lower section. The first crushing assembly is configured to receive and crush material falling from the left end of the first upper section.

The second annular filter belt 22 is located below the first annular filter belt 21 and the first crushing component to receive the materials screened by the first annular filter belt 21 and the materials crushed by the first crushing component. The annular filter belt 22 is installed on the second transmission device and rotates counterclockwise under the driving of the second transmission device. The screen belt has a second upper section that is tensioned and a second lower section that is slack below the second upper section, so that part of the material is screened from the second upper section after the material has passed through the second upper section. The right end falls, and the rest of the material passes through the second upper section and gathers on the left side of the second lower section and falls through the second lower section. The second crushing assembly is configured to receive and crush material falling from the right end of the second upper section.

The discharge belt 13 is arranged at the bottom of the casing 11 and is used for outputting the screened and crushed materials.

In this embodiment, the material enters from the discharge port 12 and is finally transported out from the discharge belt 13 . The materials entering the feeding port 12 are firstly screened by the first annular filter belt 21, and the materials with medium and fine particle diameters directly fall into the second annular filter belt 22 for the next stage of sieving. The materials are transported by the first annular screen belt 21 and fall into the first crushing component from the left side of the first upper section for the first-stage crushing treatment. Because the first annular filter belt 21 is inclined from left to low and right to high, and its first upper section is tensioned and the first lower section is slackened, a net pocket is naturally formed on the left side of the first lower section, and the material is The highest point of the first upper section falls, after being screened by the first upper section, it naturally slides down to the left side of the first lower section and gathers in it, and then falls through the first lower section to the second Ring screen belt 22. And because the second annular filter belt 22 is inclined to the left and right, the material after being screened by the first annular filter belt 21 and crushed by the first crushing component just falls on the highest point of the second annular filter belt 22. point. In this way, it is ensured that the conveying distance of the material on the first annular filter belt 21 and the second annular filter belt 22 is as long as possible, so as to reserve for the screening of the first annular filter belt 21 and the second annular filter belt 22. Sufficient screening time can avoid the overgrinding phenomenon caused by materials falling into the crushing device in advance due to untimely screening and without effective screening. The second upper section of the second annular filter belt 22 is tensioned and the second lower section is relaxed (ie, the structure is the same as that of the first annular filter belt 21 ), and the material is screened through the second annular filter belt 22 Afterwards, the fine-grained material naturally slides to the right side of the second lower section, and the medium-sized material falls from the right end of the second upper section into the second crushing component for second-stage crushing.

Further, the first annular filter belt 21 rotates clockwise, and the second annular filter belt 22 rotates counterclockwise, that is, the running direction of the filter belt is opposite to the natural falling direction of the material, so as to prolong the transportation time of the material and ensure that the material is in the The sieving time on the filter belt further improves the sieving effect. And because the first lower section and the second lower section are loosely arranged, the falling of the material will increase the vibration amplitude of the first lower section and the second lower section, and further improve the screening effect.

It should be noted that the present invention is not limited to only two-stage filtration and crushing, but can also set up three-stage or four-stage filtration and crushing according to actual needs. Set it on the contrary to ensure that the material filtered by the previous level falls on the highest point of the material of the next level. All filter belts are provided with filter holes 211 , and the size of the filter holes 211 on each filter belt is gradually reduced from top to bottom.

In this embodiment, the first transmission device includes a rotating assembly, a transmission gear 44 and a power transmission member 20 , and the rotating assembly includes a first rotating column 41 and a second rotating column 41 and a second rotating column 41 rotatably connected in the housing 11 and the axis of which extends in the horizontal direction. The rotating column 45 , the first rotating column 41 is located above the second rotating column 45 , and the first annular filter belt 21 is arranged on the first rotating column 41 and the second rotating column 45 . The axis of the transmission gear 44 extends in the horizontal direction, and there are four transmission gears 44 , which are fixedly connected to both ends of the first rotating column 41 and the second rotating column 45 respectively. There are two power transmission members 20, which are respectively fixed around the front and rear sides of the first annular filter belt 21. The power transmission member 20 meshes with the transmission gear 44 to drive the first annular filter under the drive of the transmission gear 44. Belt 21 turns. The structure of the second transmission device is the same as that of the first transmission device, and the only difference lies in the difference in the arrangement direction.

In this embodiment, the first transmission device further includes two vertical guide plates 51 and two arc guide plates 50 . The vertical guide plate 51 is located on the outgoing side of the first rotating column 41, that is, the vertical guide plate 51 is located on the lower right side of the first rotating column 41 (reverse in the second transmission device); the arc guide plate 50 is located on the first rotating column 41. The winding-in side of a rotating column 41 , that is, the arc-shaped guide plate 50 is located on the lower left side of the first rotating column 41 (in the opposite direction in the second transmission). The arc-shaped guide plate 50 is arched toward the vertical guide plate 51 , the first upper section passes through the guide channel between the two arc-shaped guide plates 50 , and the first lower section passes through the space between the two vertical guide plates 51 . guide channel between. The vertical guide plate 51 and the arc-shaped guide plate 50 are provided to limit the circular direction of the first annular first screen belt 21 at the first rotating column 41, so that the travel direction of the first upper section is changed by more than 90°, that is, the first The upper section is bent and wound into the first rotating column 41 to prevent the material on the first upper section from being brought into the gap between the first lower section and the housing 11 , resulting in equipment jamming.

In this embodiment, the first crushing component includes a rough grinding toothed roller 42 and a first material guide assembly 30. The axis of the rough grinding toothed roller 42 extends in the horizontal direction and is rotatably connected to the casing 11, and the rough grinding toothed roller 42 is arranged in parallel There are two, and the rotation directions of the two rough grinding rollers 42 are opposite. The first material guide assembly 30 is fixedly connected to the housing 11, the upper end of the first material guide assembly 30 is located below the left end of the first upper section, and the lower end of the first material guide assembly 30 is narrowed and located at the two rough grinding rollers 42 above the grind. A plurality of first grinding protrusions are arranged on the peripheral wall surface of the rough grinding toothed roller 42, and the end surfaces of the first grinding protrusions can be set to a conical structure to facilitate crushing and grinding of materials.

In this embodiment, the second crushing component includes a fine grinding toothed roller 43 and a second material guide assembly. The axis of the fine grinding toothed roller 43 extends in the horizontal direction and is rotatably connected to the casing 11. The fine grinding toothed roller 43 is provided in parallel with Two, and the rotation directions of the two fine-grinding toothed rollers 43 are opposite. The second material guide assembly is fixedly connected to the housing 11 , the upper end of the second material guide assembly is located below the right end of the second upper section, and the lower end of the second material guide assembly is narrowed and located at the grinding point of the two fine grinding toothed rollers 43 above. A plurality of second grinding protrusions are arranged on the peripheral wall surface of the fine grinding toothed roller 43, and the end surfaces of the second grinding protrusions can be set in a conical structure, which is convenient for crushing and grinding the material.

In this embodiment, the first material guide assembly 30 and the second material guide assembly each include a first guide plate 31 , a second guide plate 32 , a plurality of pillars 33 and a plurality of connecting columns 34 . The first guide plate 31 is fixedly connected to the side wall of the housing 11 , and the lower end of the first guide plate 31 of the first material guide assembly 30 is inclined to the grinding place of the two rough grinding toothed rollers 42 . The lower end of a guide plate 31 is inclined toward the grinding place of the two fine grinding toothed rollers 43; the second guide plate 32 is fixedly connected with the first guide plate 31, and the lower end of the second guide plate 32 of the first material guide assembly 30 faces two The grinding places of the two rough grinding toothed rollers 42 are inclined, and the lower end of the second guide plate 32 of the second material guide assembly is inclined to the grinding places of the two fine grinding toothed rollers 43; the first guide plate 31 and the second guide plate 32 and the The inner walls of the housing 11 together form a guide hopper, which has guided the material to the grinding place of the two rough-grinding toothed rollers 42 or the two fine-grinding toothed rollers 43 . A plurality of pillars 33 are provided at intervals between the housing 11 and the first guide plate 31 to support the first guide plate 31 . A plurality of connecting posts 34 are provided at intervals between the first guide plate 31 and the second guide plate 32 to fixedly connect the second guide plate 32 and the first guide plate 31 .

In this embodiment, the power transmission member 20 is a timing belt.

In this embodiment, the power transmission member 20 may also be a chain. The power conveying member 20 is set as a chain, because the chain is rigid in the front and rear directions, it can ensure that the filter belt is kept in contact with the inner wall of the casing 11 during the process of receiving and conveying materials, so as to prevent the material from being transported from the power conveying member 20 and the casing. The body 11 falls between the gaps.

In order to facilitate the connection of the filter belt and the chain, in this embodiment, the side of the chain close to the first annular filter belt 21 or the second annular filter belt 22 is provided with a plurality of groups of filter screen clips at intervals along the extension direction of the chain Each set of filter screen holders includes two filter screen holding plates 64 arranged symmetrically, and the edges of the first annular filter belt 21 or the second annular filter belt 22 are arranged on the two filter screen holding plates. Between 64 , the two filter screen holding plates 64 and the first annular filter screen belt 21 or the second annular filter screen belt 22 are fixedly connected through the filter screen fixing column 63 . Specifically, the chain includes a plurality of chain plates 61 and a plurality of hinge columns 62, the plurality of chain plates 61 are connected in series by the hinge columns 62, the chain plates 61 are arranged in two layers at intervals along the front-rear direction, and the filter screen clamping plate 64 is arranged at On the chain plate 61 close to the side of the filter belt.

In this embodiment, the first rotating column 41 , the second rotating column 45 and the discharge belt 13 are all connected with the crawler motor 14 , and the rough grinding gear rollers 42 and the fine grinding gear rollers 43 are both connected with the crushing motor 15 . The crawler motor 14 connecting the first rotating column 41 and the second rotating column 45 rotates at the same speed. Two motors are provided with the same rotating speed so that the upper section of the filter belt will not be affected by the material and is always in a tensioned state.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. within.

Claims (10)

1. The utility model provides an energy-concerving and environment-protective type breaker for building engineering which characterized in that: the method comprises the following steps:

the right side of the upper end of the shell is provided with a feed opening, and a first transmission device and a second transmission device which are arranged up and down are arranged in the feed opening;

a first endless filter belt mounted to the first drive means to receive material from the feed opening and rotated clockwise by the first drive means, the first drive means causing the first endless filter belt to be inclined from low left to high right and having a tensioned first upper section and a slack first lower section below the first upper section such that a portion of the material screened by the first upper section falls from the left end of the first upper section, the remainder of the material passes through the first upper section and the first lower section causes at least a portion of the remainder of the material to collect in the left section of the first lower section and fall through the first lower section;

a first crushing assembly configured to receive and crush material falling from a left end of the first upper section;

a second endless screen belt positioned below the first endless screen belt and the first crushing assembly to receive material screened by the first endless screen belt and material crushed by the first crushing assembly, the second endless screen belt being mounted to the second transmission and being driven by the second transmission to rotate in a counterclockwise direction, the second transmission providing a high right and low inclination of the second endless screen belt and providing a second shape screen belt having a tensioned second upper section and a slack second lower section below the second upper section;

a second crushing assembly configured to receive and crush material falling from a right end of the second upper section; and

and the material outlet belt is arranged at the bottom in the shell and used for outputting the materials after being screened and crushed.

2. The energy-saving and environment-friendly crushing device for the building engineering according to claim 1, characterized in that: the first transmission device includes:

the rotating assembly comprises a first rotating column and a second rotating column which are rotatably connected in the shell, the axes of the first rotating column and the second rotating column extend along the horizontal direction, the first rotating column is positioned above the second rotating column, and the first annular filter screen is wound on the first rotating column and the second rotating column;

the axis of each transmission gear extends along the horizontal direction, and the number of the transmission gears is four, and the four transmission gears are respectively and fixedly connected to two ends of the first rotating column and the second rotating column; and

the two power conveying pieces are respectively fixedly wound on the front side and the rear side of the first annular filter screen belt, and are meshed with the transmission gear so as to drive the first annular filter screen belt to rotate under the driving of the transmission gear;

the structure of the second transmission device is the same as that of the first transmission device.

3. The energy-saving and environment-friendly crushing device for the building engineering as claimed in claim 2, wherein: first transmission still includes two vertical deflectors and two arc deflectors, vertical deflector is located first rotation post winds the side of going out, the arc deflector is located first rotation post winds the side of going into, the arc deflector to vertical deflector hunch-up, first upper portion district section passes guide way between two arc deflectors, first lower portion district section passes guide way between two vertical deflectors.

4. The energy-saving and environment-friendly crushing device for the building engineering according to claim 1, characterized in that: the first crushing assembly comprises:

the axis of each rough grinding toothed roller extends along the horizontal direction and is rotationally connected with the shell, two rough grinding toothed rollers are arranged in parallel, and the rotating directions of the two rough grinding toothed rollers are opposite; and

the first material guiding assembly is fixedly connected to the shell, the upper end of the first material guiding assembly is located below the left end of the first upper section, and the lower end of the first material guiding assembly is narrowed and located above the grinding positions of the two rough grinding tooth rollers.

5. The energy-saving and environment-friendly crushing device for the building engineering according to claim 4, characterized in that: the second crushing assembly comprises:

the axes of the fine grinding toothed rollers extend along the horizontal direction and are rotationally connected with the shell, two fine grinding toothed rollers are arranged in parallel, and the rotating directions of the two fine grinding toothed rollers are opposite; and

and the second material guiding assembly is fixedly connected to the shell, the upper end of the second material guiding assembly is positioned below the right end of the second upper section, and the lower end of the second material guiding assembly is narrowed and positioned above the grinding positions of the two fine grinding tooth rollers.

6. The energy-saving and environment-friendly crushing device for building engineering according to claim 4 or 5, characterized in that: the first material guiding assembly and the second material guiding assembly both comprise:

the lower end of the first guide plate of the first guide assembly inclines to the grinding positions of the two coarse grinding tooth rollers, and the lower end of the first guide plate of the second guide assembly inclines to the grinding positions of the two fine grinding tooth rollers;

the lower end of the second guide plate of the second guide assembly inclines to the grinding positions of the two coarse grinding tooth rollers, and the lower end of the second guide plate of the second guide assembly inclines to the grinding positions of the two fine grinding tooth rollers;

a plurality of stays disposed at intervals between the housing and the first guide plate to support the first guide plate;

a plurality of connection posts disposed at intervals between the first guide plate and the second guide plate to fixedly connect the second guide plate with the first guide plate.

7. The energy-saving and environment-friendly crushing device for the building engineering as claimed in claim 2, wherein: the power transmission piece is a synchronous belt.

8. The energy-saving and environment-friendly crushing device for the building engineering as claimed in claim 2, wherein: the power transmission piece is a chain.

9. The energy-saving and environment-friendly crushing device for the building engineering according to claim 8, characterized in that: the chain is close to first annular filter screen area or one side edge of second annular filter screen area the extending direction interval of chain is provided with multiunit filter screen holder, every group the filter screen holder includes two the filter screen grip block, first annular filter screen area or the edge setting of second annular filter screen area is in between two filter screen grip blocks, two the filter screen grip block with first annular filter screen area or second annular filter screen band-pass filter screen fixed column fixed connection.

10. The energy-saving and environment-friendly crushing device for the building engineering according to claim 6, characterized in that: first rotation post, second rotate the post and go out the material area and all be connected with track motor, rough grinding fluted roller and fine grinding fluted roller all are connected with broken motor.

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