CN210187376U

CN210187376U - Concrete rubbing crusher for building engineering

Info

Publication number: CN210187376U
Application number: CN201921082338.0U
Authority: CN
Inventors: Fengfeng Shen; 沈锋锋
Original assignee: Huzhou Xiwang Building Materials Trade Co Ltd
Current assignee: Huzhou Xiwang Building Materials Trade Co Ltd
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-03-27
Anticipated expiration: 2029-07-11

Abstract

The utility model discloses a concrete grinder for building engineering, which comprises a base, there is first box top left side of base through the support mounting, the outer wall of first pivot, second pivot, third pivot and fourth pivot has crushing roller along controlling the equal interference fit of direction, there is the casing top right side of base through the support mounting, the other end in wind channel extends into the inner chamber left side top of casing, the inner chamber top of casing is provided with dust fall mechanism, the top of casing is provided with into water valve pipe along controlling the direction, the inner chamber right side central point of casing puts and is provided with the fan. This concrete grinder for building engineering can carry out a lot of to the concrete and smash, improves crushing effect, labour saving and time saving to handle the dust that concrete crushing process produced, prevent dust polluted environment, the practicality is strong.

Description

Concrete rubbing crusher for building engineering

Technical Field

The utility model relates to a building engineering technical field specifically is a concrete grinder for building engineering.

Background

Concrete, concrete for short, refer to the collective name of the engineering composite material that the aggregate is cemented into an entirety by the cementing material, the word concrete generally refers to cement concrete that uses cement as the cementing material, sand, stone as the aggregate, mix with water (can contain admixture and admixture) according to certain proportion, through stiring, also called ordinary concrete, it is applied to civil engineering extensively, the concrete has raw materials are abundant, cheap, the simple characteristic of production process, therefore make its consumption bigger and bigger, the concrete also has compressive strength high at the same time, the durability is good, the intensity grade range is wide characteristic, these characteristics make its application range very wide, not merely use in various civil engineering, namely shipbuilding, the mechanical industry, the development of the ocean, geothermal engineering, etc., the concrete is an important material too;

the concrete crusher for the existing building engineering is crushed into single row-connected crushing rollers, the crushing effect is poor, workers are required to crush repeatedly, time and labor are wasted, a large amount of dust is generated in the concrete crushing process, and the environment is easily polluted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a concrete grinder for building engineering to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a concrete crusher for constructional engineering comprises a base, wherein a first box body is installed on the left side of the top end of the base through a support, a second box body is installed on the top end of the first box body, a feeding hopper is installed at the rear opening of the top end of an inner cavity of the second box body, a discharging hopper is installed at the rear opening of the bottom end of the inner cavity of the first box body, a through hole which is communicated from top to bottom is formed in the front side of the bottom end of the inner cavity of the second box body and corresponds to the top end of the inner cavity of the first box body, a second rotating shaft and a first rotating shaft are respectively connected with the front end and the rear end of the corresponding position of the bottom end of the feeding hopper in the left-right direction in a rotating mode through bearings, an inner ring of each bearing is in interference fit with the outer walls of the first rotating shaft and the second rotating shaft, an outer ring of each bearing is fixedly connected with the, the left side key of the outer wall of the second rotating shaft is connected with a second gear meshed with the first gear, the left end of the second rotating shaft extends out of the left side of the second box body, the left side of the second box body is provided with a servo motor at a position corresponding to the second rotating shaft, the output end of the servo motor is locked with the left end of the outer wall of the second rotating shaft through a coupler, the front end and the rear end of the position corresponding to the bottom end of the feed hopper at the front side of the inner cavity of the first box body are respectively connected with a third rotating shaft and a fourth rotating shaft through bearings in a rotating mode along the left-right direction, the left end of the outer wall of the third rotating shaft is connected with a third gear, the left side key of the outer wall of the fourth rotating shaft is connected with a fourth gear meshed with the third gear, the left end of the fourth rotating shaft extends out of the left side of the second box body, and the left ends of the, and two upper and lower belt pulleys pass through the belt and rotate the connection, the outer wall of first pivot, second pivot, third pivot and fourth pivot has crushing roller along the equal interference fit of left right direction, there is the casing top right side of base through the support mounting, the one end in wind channel is all installed to the inner chamber right side rear end of first box and the inner chamber right side front end opening part of second box, and two upper and lower wind channel inner chambers communicate with each other, the other end in wind channel extends into the inner chamber left side top of casing, the inner chamber top of casing is provided with dust fall mechanism, the top of casing is provided with the water inlet valve pipe along left right direction, the inner chamber right side central point of casing puts and is provided with the fan.

Preferably, the dust falling mechanism comprises a guide rail, a sliding block, a spring, a rectangular rod, a U-shaped plate, a rectangular plate, a flat pipe, a connecting rod, a stepping motor and a cam;

the left side and the right side of the top end of the inner cavity of the shell are both provided with guide rails along the left-right direction, the outer sides of the inner cavities of the left guide rail and the right guide rail are both inserted with a slide block, the inner side of the slide block is clamped with one end of a spring, the other end of the spring is clamped with the inner side of the inner wall of the guide rail, the bottom end of the slide block extends out of the lower surface of the guide rail and is provided with a rectangular rod along the left-right direction, the top end of the inner cavity of the shell and the left end and the right end of the outer wall of the guide rail are both provided with a U-shaped plate, the inner side of the U-shaped plate is rotatably connected with the rectangular plate through a pin shaft, the bottom end of the rectangular plate is provided with a flat pipe along the front-back direction, the left side and the, the other end of the connecting rod is rotatably connected with the center of the front side of the rectangular plate through a pin shaft, a stepping motor is arranged at the top end of the inner cavity of the shell and is positioned at the center of the inner sides of the left guide rail and the right guide rail, a cam is connected with an output end of the stepping motor through a screw, and the hub ends far away from the left side and the right side of the cam are respectively contacted with the inner sides of the left rectangular rod and the right rectangular rod.

Preferably, the periphery of the bottom end of the inner cavity of the first box body is obliquely arranged from top to bottom along the top end of the discharge hopper.

Preferably, the inner cavity bottom cross section of feeder hopper and through-hole is the rectangle, and the length of smashing the roller is greater than the bottom cross section width of feeder hopper and through-hole.

Preferably, the inner cavity of the guide rail is in a dovetail groove shape, and the sliding block is inserted into the inner cavity of the guide rail in a matched mode.

Preferably, the bottom of flat pipe is provided with a plurality of nozzle from the past to back clearance.

Preferably, the distance between the output end of the cam and the top end of the inner cavity of the shell is larger than the diameter length of the cam far hub.

Compared with the prior art, the beneficial effects of the utility model are that: the oil-water separation and demulsification integrated equipment has the advantages that the second rotating shaft drives the second gear and the belt pulley at the corresponding position to rotate through the servo motor, the first gear drives the first rotating shaft to rotate under the action of the rotating force of the second gear, the second rotating shaft and the first rotating shaft drive the crushing rollers on the outer wall of the second rotating shaft to rotate in opposite directions, then concrete blocks are crushed for the first time, the primarily crushed concrete enters the first box body, the belt pulley on the outer wall of the fourth rotating shaft drives the fourth rotating shaft to rotate clockwise, the third gear drives the third rotating shaft to rotate under the action of the rotating force of the fourth gear, the fourth rotating shaft and the third rotating shaft drive the crushing rollers on the outer wall of the third rotating shaft to rotate in opposite directions, then the concrete blocks are crushed for the second time, and dust generated by crushing the concrete in the first box body and the second box body is sucked into the shell body along an air, the water flow inside the water inlet valve enters the flat pipe along the hose, water mist is formed by spraying of nozzles of the flat pipe to perform water mist dust settling treatment on dust in the shell, the cam is driven to rotate by the stepping motor to enable the far hub end and the near hub end of the cam to be in intermittent contact with the inner side of the rectangular rod, reciprocating movement inside and outside the rectangular rod is promoted, the rectangular plate is pulled to rotate in an inward and outward reciprocating mode under the cooperation of the connecting rod, the left rectangular plate and the right rectangular plate drive the flat pipe to perform fan-shaped reciprocating movement on the top end of an inner cavity of the shell, the spraying area of the flat pipe is improved, the dust settling effect is improved, multiple times of crushing can be performed on concrete, the crushing effect is improved, time and labor are saved, the dust generated in the concrete crushing process is treated.

Drawings

Fig. 1 is a front sectional view of the present invention;

fig. 2 is a left side sectional view of the present invention;

fig. 3 is a schematic view of the position a of the present invention.

In the figure: 1. the device comprises a base, 2, a first box body, 3, a second box body, 4, a feed hopper, 5, a discharge hopper, 6, a through hole, 7, a first rotating shaft, 8, a first gear, 9, a second rotating shaft, 10, a second gear, 11, a third rotating shaft, 12, a third gear, 13, a fourth rotating shaft, 14, a fourth gear, 15, a servo motor, 16, a belt pulley, 17, a crushing roller, 18, an air duct, 19, a shell, 20, a guide rail, 21, a sliding block, 22, a spring, 23, a rectangular rod, 24, a U-shaped plate, 25, a rectangular plate, 26, a flat pipe, 27, a connecting rod, 28, a stepping motor, 29, a cam, 30, a water inlet valve pipe, 31 and a fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a concrete grinder for building engineering, which comprises a base 1, there is first box 2 on the left of the top of base 1 through the support mounting, second box 3 is installed on the top of first box 2, feeder hopper 4 is installed to the inner chamber top rear side opening department of second box 3, the staff can drop into in feeder hopper 4 with the kibbling concrete piece of needs, and get into to second box 3 in by feeder hopper 4, hopper 5 is installed out to the inner chamber bottom rear side opening department of first box 2, go out hopper 5 below and can have placed out the workbin, collect the concrete after smashing, the through-hole 6 that link up from top to bottom is seted up with the inner chamber top corresponding position department of first box 2 to the inner chamber bottom front side of second box 3, the concrete after being tentatively smashed can pass through-hole 6 and get into first box 2 along the bottom inclined plane of second box 3, the front and back both ends of the bottom corresponding position department of second box 3 inner chamber rear side and feeder hopper 4 are changeed through the bearing respectively along controlling the direction A second rotating shaft 9 and a first rotating shaft 7 are movably connected, an inner ring of the bearing is in interference fit with the outer walls of the first rotating shaft 7 and the second rotating shaft 9, an outer ring of the bearing is fixedly connected with the inner wall of the second box body 3, the left end of the outer wall of the first rotating shaft 7 is in key connection with a first gear 8, the left side of the outer wall of the second rotating shaft 9 is in key connection with a second gear 10 meshed with the first gear 8, the left end of the second rotating shaft 9 extends out of the left side of the second box body 3, a servo motor 15 is arranged at the position, corresponding to the second rotating shaft 9, of the left side of the second box body 3, the servo motor 15 drives the second rotating shaft 9 to rotate, the second rotating shaft 9 drives the second gear 10 and a belt pulley 16 at the corresponding position to rotate, the first gear 8 drives the first rotating shaft 7 to rotate anticlockwise under the rotating force of the second gear 10, so that the second rotating shaft 9 and the first rotating shaft 7 drive, further crushing the concrete blocks for the first time, the output end of the servo motor 15 is locked with the left end of the outer wall of the second rotating shaft 9 through a coupler, the front end and the rear end of the position corresponding to the bottom end of the feed hopper 4 on the front side of the inner cavity of the first box body 2 are respectively connected with the third rotating shaft 11 and the fourth rotating shaft 13 through bearings in a left-right direction in a rotating way, the left end of the outer wall of the third rotating shaft 11 is connected with a third gear 12 in a key way, the left end of the outer wall of the fourth rotating shaft 13 is connected with a fourth gear 14 meshed with the third gear 12 in a key way, the left end of the fourth rotating shaft 13 extends out of the left side of the second box body 3, belt pulleys 16 are respectively in interference fit at the left ends of the outer walls of the second rotating shaft 9 and the fourth rotating shaft 13, the upper belt pulley and the lower belt pulley 16 are connected in a rotating way through a belt, the belt pulley 16 on the outer wall, the fourth rotating shaft 13 and the third rotating shaft 11 drive the crushing roller 17 on the outer wall of the fourth rotating shaft to rotate in opposite directions, so as to crush the concrete blocks for the second time, so as to improve the crushing effect of the concrete, the crushing rollers 17 are respectively in interference fit with the outer walls of the first rotating shaft 7, the second rotating shaft 9, the third rotating shaft 11 and the fourth rotating shaft 13 along the left and right directions, the shell 19 is installed on the right side of the top end of the base 1 through a bracket, the shell 19 has good sealing performance, the bottom end of the shell 19 is provided with a water outlet valve, the water outlet valve at the bottom end of the shell 19 is connected with an external filtering system, water with dust is discharged by the water outlet valve and is filtered by a filtering device so as to be recycled, one end of an air duct 18 is installed at the rear end of the right side of the inner cavity of the first box 2 and the opening at the front end of the right side of the inner cavity of the second, the inner chamber top of casing 19 is provided with the dust fall mechanism, and the top of casing 19 is provided with water inlet valve pipe 30 along the left and right direction, and the inner chamber right side central point of casing 19 puts and is provided with fan 31, and fan 31 inhales the dust that produces in first box 2 and the interior concrete crushing of second box 3 to casing 19 in along wind channel 18 to carry out the dust fall to the dust and handle.

Preferably, the dustfall mechanism further comprises a guide rail 20, a sliding block 21, a spring 22, a rectangular rod 23, a U-shaped plate 24, a rectangular plate 25, a flat pipe 26, a connecting rod 27, a stepping motor 28 and a cam 29;

guide rails 20 are arranged on the left side and the right side of the top end of an inner cavity of the shell 19 along the left-right direction, sliders 21 are inserted into the outer sides of the inner cavities of the left guide rail 20 and the right guide rail 20, one end of a spring 22 is clamped on the inner side of the spring 21, the other end of the spring 22 is clamped with the inner side of the inner wall of the guide rail 20, the spring 22 is an extension spring, the elastic coefficient is 16N/CM, the spring is stretched or extruded to generate elastic deformation and restore to an initial state after external force is removed, a rectangular rod 23 is arranged on the bottom end of the slider 21 and extends out of the lower surface of the guide rail 20 along the left-right direction, U-shaped plates 24 are arranged on the top end of the inner cavity of the shell 19 and are arranged on the left side and the right side of the outer side of the guide rail 20, the inner sides of the U-shaped plates 24 are rotatably connected with rectangular plates 25, the water flow in the water inlet valve pipe 30 enters the flat pipe 26 along the hose, and forms water mist sprayed by the nozzle of the flat pipe 26 to carry out water mist dust settling treatment on dust in the shell 19, the other end of the hose extends into the top end of the inner cavity of the shell 19 and is in threaded connection with the rear side of the flat pipe 26, the outer side of the front end of the rectangular rod 23 is rotatably connected with one end of a connecting rod 27 through a pin shaft, the other end of the connecting rod 27 is rotatably connected with the center position of the front side of the rectangular plate 25 through a pin shaft, the top end of the inner cavity of the shell 19 and the center positions of the inner sides of the left and right guide rails 20 are provided with a stepping motor 28 through a bracket, the output end of the stepping motor 28 is in screwed connection with a cam 29, the stepping motor 28 drives the cam 29 to rotate, when the hub end of the cam 29 is in contact with the inner side of the rectangular rod 23, the cam 29 pushes the rectangular rod, when the hub end near the cam 29 contacts the inner side of the rectangular rod 23, the spring 22 pulls the rectangular rod 21 to move inward under the action of its own elasticity, and the slider 21 drives the rectangular rod 23 to move inward, the rectangular rod 23 pulls the rectangular plate 25 to rotate inward under the cooperation of the connecting rod 27, so that the left and right rectangular plates 25 drive the flat pipe 26 to reciprocate in a fan shape at the top end of the inner cavity of the shell 19, the spraying area of the flat pipe 26 is further improved, the dust settling effect is improved, and the hub ends far from the left and right sides of the cam 29 respectively contact the inner sides of the left and right rectangular rods 23.

Preferably, the periphery of the bottom end of the inner cavity of the first box body 2 is inclined from top to bottom along the top end of the discharge hopper 5, so that the secondarily crushed concrete slides into the discharge hopper 5 along the inclined plane at the bottom end of the first box body 2 and is discharged from the discharge hopper 5.

Preferably, the cross section of the bottom end of the inner cavity of the feed hopper 4 and the through hole 6 is rectangular, and the length of the crushing roller 17 is larger than the width of the cross section of the bottom end of the feed hopper 4 and the through hole 6, so as to prevent the crushed area of the crushing roller 17 from being too small to cause the uncrushed concrete to leak out.

Preferably, the inner cavity of the guide rail 20 is in a dovetail groove shape, and the sliding block 21 is inserted into the inner cavity of the guide rail 20, so that the sliding block 21 limits the rectangular rod 23.

As preferred scheme, further, the bottom of flat pipe 26 is provided with a plurality of nozzle from the past to the back clearance, increases the interior water smoke spraying area of flat pipe 26, improves dust fall effect.

Preferably, the distance between the output end of the cam 29 and the top end of the inner cavity of the shell 19 is larger than the length of the diameter of the hub of the cam 29, so as to prevent the cam 29 from colliding with the inner wall of the shell 19 during rotation.

The following electric devices have the following types and functions:

the servo motor 15: the servo motor is the SGMAH-08AAA41 type servo motor, the servo motor 15 is connected with an external power supply, the external power supply is 380V alternating current, and the servo motor 15 is controlled by an external operating system and can drive the second rotating shaft 9 to rotate;

the stepping motor 28: the model number is 86BYG25OA, the stepping motor 28 is connected with an external power supply, the external power supply is 380V alternating current, and the stepping motor 28 is controlled by an external operating system and can drive the cam 29 to rotate;

the fan 31: the model is SF-138PZ02, the fan 31 is connected with an external power supply, the external power supply is 380V alternating current, the fan 31 is controlled by an external operating system, and dust generated by crushing concrete in the first box body 2 and the second box body 3 can be sucked into the shell 19 along the air duct 18.

The detailed connection means is a technique known in the art, and the following mainly describes the working principle and process, and the specific operation is as follows.

When the concrete crusher is used, a worker puts concrete blocks to be crushed into the feed hopper 4 and enters the second box body 3 from the feed hopper 4, the worker controls the servo motor 15 to start, the servo motor 15 drives the second rotating shaft 9 to rotate clockwise, the second rotating shaft 9 drives the second gear 10 and the belt pulley 16 on the corresponding position to rotate clockwise, the first gear 10 is meshed with the first gear 8, the first gear 8 drives the first rotating shaft 7 to rotate anticlockwise under the action of the rotating force of the second gear 10, the second rotating shaft 9 and the first rotating shaft 7 drive the crushing roller 17 on the outer wall of the second rotating shaft 9 to rotate in opposite directions, the concrete blocks are crushed for the first time, the primarily crushed concrete passes through the through hole 6 along the bottom inclined plane of the second box body 3 and enters the first box body 2, and the belt pulley 16 on the outer wall of the second rotating shaft 9 is connected with the belt pulley 16 on the outer wall of the fourth rotating shaft 13 in a rotating manner, the belt pulley 16 on the outer wall of the fourth rotating shaft 13 is promoted to drive the fourth rotating shaft 13 to rotate clockwise, the third gear 12 is promoted to be meshed with the fourth gear 14, the third gear 12 drives the third rotating shaft 11 to rotate anticlockwise under the action of the rotating force of the fourth gear 14, the fourth rotating shaft 13 and the third rotating shaft 11 drive the crushing rollers 17 on the outer walls of the fourth rotating shaft and the third rotating shaft to rotate in opposite directions, so that concrete blocks are crushed for the second time, the secondarily crushed concrete slides into the discharge hopper 5 along the bottom end inclined plane of the first box body 2 and is discharged from the discharge hopper 5, the crushing effect of the concrete is improved, a large amount of dust is generated in the crushing process of the concrete, a worker connects the water inlet valve pipe 30 with an external water pipe, water in the water inlet valve pipe 30 enters the flat pipe 26 along a hose, and forms water mist sprayed by a nozzle of the flat pipe 26 to perform water mist dust settling treatment on the dust in the shell 19, the water outlet valve at the bottom end of the shell 19 is connected with an external filtering system, water with dust is discharged from the water outlet valve and is filtered by a filtering device so as to be recycled, the fan 31 and the stepping motor 28 are controlled to be started in sequence, the fan 31 is started to suck dust generated by crushing concrete in the first box body 2 and the second box body 3 into the shell 19 along the air duct 18, the stepping motor 28 drives the cam 29 to rotate clockwise, due to different outer diameters of the cam 29, when the hub end far away from the cam 29 is contacted with the inner side of the rectangular rod 23, under the limiting action of the sliding block 21, the cam 29 pushes the rectangular rod 23 to move outwards and stretches the spring 22 to elastically deform, due to the fact that the rectangular plate 25 is rotationally connected with the inner side of the U-shaped plate 24 through the pin shaft, and the two ends of the connecting rod 27 are respectively connected with the rectangular plate 25 and the rectangular rod 23 through the pin shaft, the rectangular rod 23 pushes the rectangular, when cam 29's near hub end and the inboard contact that takes place of rectangular bar 23, spring 22 pulls 21 under self elastic action and moves to the inboard, and make slider 21 drive rectangular bar 23 and move to the inboard, rectangular bar 23 pulls rectangular bar 25 and rotates to the inboard under the cooperation of connecting rod 27, and then make about two rectangular bars 25 drive flat pipe 26 and be fan-shaped reciprocating motion on the inner chamber top of casing 19, and then improve flat pipe 26's the area that sprays and improve the dust fall effect, thereby can carry out a lot of crushing to the concrete, improve crushing effect, time saving and labor saving, and handle the dust that the concrete crushing process produced, prevent dust pollution environment, therefore, the clothes hanger is strong in practicability.

In the description of the present invention, it is to be understood that the terms "top end", "bottom end", "one end", "front side", "rear side", "other end", "upper", "lower", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated; also, unless expressly stated or limited otherwise, the terms "mounted," "keyed," "plugged," "interference fit," "disposed," and the like are to be construed broadly and can include, for example, a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a concrete grinder for building engineering, includes base (1), its characterized in that: the device comprises a base (1), a first box body (2) is installed on the left side of the top end of the base (1) through a support, a second box body (3) is installed on the top end of the first box body (2), a feed hopper (4) is installed at the opening of the rear end of the top end of an inner cavity of the second box body (3), a discharge hopper (5) is installed at the opening of the rear end of the bottom end of the inner cavity of the first box body (2), a through hole (6) which is communicated up and down is formed in the front side of the bottom end of the inner cavity of the second box body (3) and the corresponding position of the top end of the inner cavity of the first box body (2), a second rotating shaft (9) and a first rotating shaft (7) are respectively connected with the front end and the rear end of the corresponding position of the bottom end of the feed hopper (4) in a left-right direction through rotation of a bearing, the inner ring of the bearing is in interference fit with the outer wall of, the outer wall left end key of first pivot (7) is connected with first gear (8), the outer wall left side key of second pivot (9) is connected with second gear (10) with first gear (8) engaged with, the left end of second pivot (9) extends the left side of second box (3), the left side and the corresponding position department of second pivot (9) of second box (3) are provided with servo motor (15), the output of servo motor (15) passes through the outer wall left end locking of shaft coupling and second pivot (9), the inner chamber front side of first box (2) with both ends are connected with third pivot (11) and fourth pivot (13) through bearing rotation respectively about along the direction around the corresponding position department of bottom of feeder hopper (4), the outer wall left end key of third pivot (11) is connected with third gear (12), the outer wall left side key of fourth pivot (13) is connected with the fourth tooth engaged with third gear (12) mutually The dust-settling device comprises wheels (14), the left end of a fourth rotating shaft (13) extends out of the left side of a second box body (3), belt pulleys (16) are arranged at the left ends of the outer walls of a second rotating shaft (9) and the fourth rotating shaft (13) in an interference fit mode, an upper belt pulley and a lower belt pulley (16) are connected in a rotating mode through belts, crushing rollers (17) are arranged on the outer walls of the first rotating shaft (7), the second rotating shaft (9), a third rotating shaft (11) and the fourth rotating shaft (13) in an interference fit mode in the left-right direction, a shell (19) is installed on the right side of the top end of a base (1) through a support, one end of an air duct (18) is installed at the rear end of the right side of an inner cavity of a first box body (2) and the opening at the front end of the right side of the inner cavity of a second box body (3), the inner cavities of the upper air duct (18) and the lower air duct (18, the top of casing (19) is provided with into water valve pipe (30) along the left-right direction, the inner chamber right side central point of casing (19) puts and is provided with fan (31).

2. The concrete crusher for construction engineering according to claim 1, characterized in that: the dust settling mechanism comprises a guide rail (20), a sliding block (21), a spring (22), a rectangular rod (23), a U-shaped plate (24), a rectangular plate (25), a flat pipe (26), a connecting rod (27), a stepping motor (28) and a cam (29);

the guide rails (20) are arranged on the left side and the right side of the top end of the inner cavity of the shell (19) along the left-right direction, the sliding blocks (21) are inserted on the outer sides of the inner cavities of the left guide rail and the right guide rail (20), one end of a spring (22) is clamped on the inner side of the inner wall of the sliding block (21), the bottom end of the sliding block (21) extends out of the lower surface of the guide rail (20) and is provided with a rectangular rod (23) along the left-right direction, U-shaped plates (24) are arranged on the top end of the inner cavity of the shell (19) and are positioned at the left end and the right end of the outer side of the guide rail (20), the inner sides of the U-shaped plates (24) are rotatably connected with rectangular plates (25) through pin shafts, flat pipes (26) are arranged at the bottom ends of the rectangular plates (25) along the front, the other end of the hose extends into the top end of an inner cavity of the shell (19) and is in threaded connection with the rear side of the flat pipe (26), the outer side of the front end of the rectangular rod (23) is rotatably connected with one end of a connecting rod (27) through a pin shaft, the other end of the connecting rod (27) is rotatably connected with the center of the front side of the rectangular plate (25) through a pin shaft, a stepping motor (28) is arranged at the center of the inner sides of the left guide rail (20) and the right guide rail (20) at the top end of the inner cavity of the shell (19) through a support, a cam (29) is in screwed connection with the output end of the stepping motor (28), and the hub far ends of the left side and the right side of the cam (29.

3. The concrete crusher for construction engineering according to claim 1, characterized in that: the bottom end of the inner cavity of the first box body (2) is arranged along the top end of the discharge hopper (5) in an inclined mode from top to bottom.

4. The concrete crusher for construction engineering according to claim 1, characterized in that: the inner cavity bottom cross section of feeder hopper (4) and through-hole (6) is the rectangle, and the length of smashing roller (17) is greater than the bottom cross section width of feeder hopper (4) and through-hole (6).

5. The concrete crusher for construction engineering according to claim 2, characterized in that: the inner cavity of the guide rail (20) is in a dovetail groove shape, and the sliding block (21) is in adaptive insertion connection with the inner cavity of the guide rail (20).

6. The concrete crusher for construction engineering according to claim 2, characterized in that: the bottom of flat pipe (26) is provided with a plurality of nozzle to the back clearance in the past.

7. The concrete crusher for construction engineering according to claim 2, characterized in that: the distance between the output end of the cam (29) and the top end of the inner cavity of the shell (19) is larger than the diameter length of the far hub of the cam (29).