CN114405810A - Construction waste screening equipment - Google Patents

Abstract

The invention provides building garbage screening equipment which comprises a vibrating screening machine, wherein the vibrating screening machine comprises a rack, a vibrating box, a screening net and a power assembly, an upper opening is formed in the upper end of the vibrating box, a dust hood is covered on the upper opening, a dust collecting pipe is connected to the upper end of the dust hood, a cyclone dust collector is connected to the dust collecting pipe, a pulse dust collector is connected to an air outlet of the cyclone dust collector, an induced draft fan is connected to an air outlet of the pulse dust collector, and a chimney which is vertically arranged is connected to the air outlet of the induced draft fan. Through setting up the vibration screening machine, can realize continuous production, production efficiency is higher relatively, through setting up draught fan and dust cage, utilizes the mode of negative pressure selection by winnowing to collect the light thing that is thrown up by the vibration screening machine, and the light thing is difficult for adhesion once more on the aggregate, and the aggregate contains the miscellaneous rate and is lower relatively, simultaneously through setting up cyclone, effectively distinguishes little light thing to density and selects separately, and the screening effect is better relatively.

Description

A construction waste screening equipment

technical field

The invention relates to a construction waste treatment device, in particular to a construction waste screening device.

Background technique

Concrete recycled aggregate is a building material formed by processing construction waste. Before using construction waste to process concrete recycled aggregate, it is necessary to screen the aggregate from the construction waste.

The aggregate impurity content obtained by the existing construction waste screening equipment is usually relatively high, mainly mixed with light materials such as many fine plastic films. The Chinese utility model patent with the announcement number CN209953265U discloses a vibrating air separation equipment for regenerated aggregate of construction waste, which includes a screening unit, a vibrating unit, a blowing unit and a collecting unit. The vibrating unit is arranged below the screening unit, and the drum is The air unit and the collecting unit are arranged on both sides of the screening unit. The screening unit includes a screening box and a multi-layer screening plate arranged in the screening box. A receiving plate is arranged under the screening plate, and the peripheral wall of the screening box is provided. There is a support table on the top, the screening plate and the receiving plate are all set on the support table, the screen holes on the screening plate gradually decrease from top to bottom, and the air supply port of the blast unit is connected to each layer of the screening plate and the connecting plate. Above one side of the material plate, the side of the screening box close to the collecting unit is provided with a discharge port corresponding to the top of the screen plate and the material receiving plate, and a feeding port is provided above the screening box. The equipment can use positive pressure air separation to blow away the light substances in the construction waste to reduce the impurity content of the aggregate. However, the equipment cannot achieve continuous production, and the production efficiency is relatively low. Lightweight materials are easy to adhere to the aggregate again, resulting in a relatively high impurity content of the aggregates, and it is difficult to effectively sort the lightweight materials with little density distinction, and the screening effect is relatively poor.

In view of this, the applicant has conducted in-depth research on the structure of the construction waste screening equipment, and this case came about.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a construction waste screening equipment with relatively high production efficiency, relatively low aggregate impurity content and relatively good screening effect.

In order to achieve the above object, the present invention adopts the following technical solutions:

A construction waste screening equipment includes a vibrating screening machine, the vibrating screening machine comprises a frame, a vibrating box arranged on the frame, a screening net fixedly connected in the inner cavity of the vibrating box, and a For the power assembly that drives the vibration box to vibrate, the upper end of the vibration box has an upper opening, the upper cover of the upper opening is provided with a dust collecting hood, the upper end of the dust collecting hood is connected with a dust collecting pipe, and the dust collecting The end of the pipe away from the dust collecting hood is connected with a cyclone dust collector, the air outlet of the cyclone dust collector is connected with a pulse dust collector, the air outlet of the pulse dust collector is connected with an induced draft fan, and the air outlet of the induced draft fan is connected with There are vertical chimneys.

As an improvement of the present invention, both the vibrating box and the sieving net are gradually inclined downward from one end of the length direction to the other end, and there are two power assemblies, and the two power assemblies are respectively Symmetrically arranged on both sides of the vibration box in the width direction, the frame is provided with spring assemblies on both sides of the vibration box at positions corresponding to both ends of the vibration box in the length direction. The vibration box is arranged on the frame through each spring assembly, and the spring assembly includes a spring seat fixed on the frame, a transverse spring arranged parallel to the width direction of the vibration box, a vertical A vertical spring and a pressure seat rotatably connected to the vibration box, one end of the horizontal spring abuts on the spring seat, the other end abuts on the vibration box, and the lower end of the vertical spring is fixed is connected to the spring seat, and the upper end abuts on the pressing seat.

As an improvement of the present invention, there are two dust collecting hoods, namely a first dust collecting hood and a second dust collecting hood, and the first dust collecting hood and the second dust collecting hood are The relatively lower end of the box is arranged in turn toward the other end, a first branch pipe is connected between the first dust collecting hood and the pipe body of the dust collecting pipe, and the second dust collecting hood and the dust collecting pipe are connected A second branch pipe is connected between the ends of the .

As an improvement of the present invention, the second branch tube is a Venturi tube.

As an improvement of the present invention, the power assembly includes a vibration motor arranged on the vibration box, a flexible coupling connected to the output shaft of the vibration motor, and a flexible coupling connected to the flexible coupling. a transmission shaft, a support bearing sleeved on the transmission shaft, a bearing seat sleeved on the support bearing, and two eccentric blocks respectively located on both sides of the bearing seat and fixedly sleeved on the transmission shaft , the eccentric directions of the two eccentric blocks are the same, and the bearing seat is fixedly connected to the vibration box.

As an improvement of the present invention, the cyclone dust collector includes an upper casing, a hopper fixedly connected to the lower end of the upper casing and the inner cavity of which is communicated with the inner cavity of the upper casing, and a hopper installed on the lower end of the upper casing. The star-shaped discharge valve at the lower end of the hopper and the air outlet pipe vertically arranged and inserted into the upper casing and the blanking hopper at the same time, the side wall of the upper casing is provided with an air inlet, the air inlet The upper end is connected with a spiral air inlet pipe, the air inlet pipe is connected with the dust collecting pipe, the upper end of the air outlet pipe is located above the upper shell, and the lower end is located near the star-shaped discharge valve. position, and the lower part of the pipe wall of the air outlet pipe is provided with a plurality of ventilation holes.

As an improvement of the present invention, the diameter of the part of the air outlet pipe penetrating the blanking hopper gradually decreases from top to bottom.

As an improvement of the present invention, the inner side wall of the air inlet pipe is further provided with a spiral baffle.

As an improvement of the present invention, a silencer is connected between the air outlet of the induced draft fan and the chimney.

Adopting the above-mentioned technical scheme, the present invention has the following beneficial effects:

1. By setting the vibrating screening machine, continuous production can be realized, and the production efficiency is relatively high. By setting the induced draft fan and the dust hood, the light materials thrown up by the vibrating screening machine are collected by means of negative pressure air selection. The matter is not easy to adhere to the aggregate again, and the impurity content of the aggregate is relatively low. At the same time, by setting a cyclone dust collector, it can effectively sort the light materials with little density difference, and the screening effect is relatively good.

2. By setting independent power components on both sides of the vibration box in the width direction, the vibration box can not only vibrate up and down under the drive of the power components, but also swing in the width direction, which can more effectively The material is thrown from the construction waste and helps to improve the vibrating screening effect.

3. By setting two dust collecting hoods, it is convenient to collect dust in sections, avoid the backflow of light materials, and improve the dust collection effect.

4. In the cyclone dust collector provided by the present invention, the air inlet pipe is arranged in a spiral shape and a spiral baffle is arranged on the inner side wall, so that the airflow rotates before entering the cyclone dust collector, so as to improve the sorting efficiency. The air outlet pipe is provided with ventilation holes on the air outlet pipe, and the sinking light material in the air outlet pipe is not easily disturbed by the air flow in the hopper, and it is not easy to cause secondary dust.

Description of drawings

Fig. 1 is the structural representation of construction waste screening equipment of the present invention;

Fig. 2 is the side view structure schematic diagram of vibrating screening machine in the present invention;

Fig. 3 is the cutaway structure schematic diagram of vibration box in the present invention;

Fig. 4 is the structural representation of the cyclone dust collector in the present invention;

Fig. 5 is the top view structure schematic diagram of the cyclone dust collector in the present invention;

FIG. 6 is a schematic diagram of the connection structure of the pulse dust collector in the present invention.

Part of the position in the figure is in partial perspective, and the corresponding indications in the figure are as follows:

10-vibrating screening machine; 11-rack;

12-vibration box; 13-screening net;

20- power assembly; 21- vibration motor;

22-flexible coupling; 23-drive shaft;

24-support bearing; 25-bearing seat;

26-eccentric block; 30-spring assembly;

31-spring seat; 32-transverse spring;

33-vertical spring; 34-pressing seat;

40-dust collecting pipe; 41-first dust collecting hood;

42- the second dust hood; 43- the first branch pipe;

44- the second branch pipe; 50- cyclone dust collector;

51-upper shell; 52-drop hopper;

53-star discharge valve; 54-air outlet pipe;

55-air inlet pipe; 60-pulse dust collector;

61 - induced draft fan; 62 - chimney;

63 - Muffler.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

As shown in FIGS. 1-6 , the present embodiment provides a construction waste screening equipment, including a vibrating screening machine 10, the vibrating screening machine 10 includes a frame 11, a vibrating box 12 arranged on the frame 11, a fixed connection The screening nets 13 in the inner cavity of the vibrating box 12 and the power assembly 20 for driving the vibrating box 12 to vibrate, wherein, there can be more than two screening nets 13, and when there are more than two screening nets, each screening net 13 is arranged from top to bottom, and the specific arrangement structure is the same as that of a conventional vibrating screening machine, which is not the focus of this embodiment, and will not be described in detail here.

Both the vibrating box 12 and the screening net 13 are gradually inclined downward from one end of the length direction to the other end, and the vibrating box 12 is provided with a feeding port at the upper position of the upper end of the screening net 13, and the construction waste flows from the vibrating box 12. The feeding port is fed into the vibrating screen machine 10, and the vibrating box 12 is respectively provided with a storage bin or a storage bin for collecting the building aggregate flowing out of the corresponding position at the position located at the lower end of each screening net 13 and the lower end of the bottom wall of the vibrating box. The material storage channel (not shown in the figure), the specific structure of the storage bin or the material storage channel and the specific connection structure between the storage bin or the material storage channel and the vibration box 12 are the same as those of the conventional vibrating screening machine, and will not be detailed here. It should be noted that the end of the vibrating box 12 or the screening net 13 in the volume of this embodiment does not simply refer to the corresponding end face, but also includes the position close to the end face, that is, the vibrating box 12 or the screening net. A site on 13.

There may be only one power assembly 20. Preferably, in this embodiment, there are two power assemblies 20, and the two power assemblies are symmetrically arranged on both sides of the width direction in the middle position of the vibration box 12, so as to meet the actual construction requirements. The garbage type makes the two power components 20 act synchronously or asynchronously. When the two power components 20 act asynchronously, the vibration box 12 will inevitably sway during the vibration process, thereby driving the construction waste in the width direction of the vibration box 12 Moving, the light substances mixed in the construction waste are easier to be separated, and the vibrating screening effect is also better. In order to be compatible with the two power assemblies 20, the frame 11 is provided with spring assemblies 30 located on both sides of the vibration box 12 at positions corresponding to both ends of the vibration box 12 in the length direction, that is, the spring assemblies 30 have four Of course, more spring components can also be provided. The vibration box 12 is disposed on the frame 11 through each spring assembly 30 , and the two spring assemblies 30 located at the same end of the vibration box 12 are symmetrically arranged.

The structure of each spring assembly 30 is the same. Taking one of the spring assemblies 30 as an example, the spring assembly 30 includes a spring seat 31 fixed on the frame 11, a transverse spring 32 arranged parallel to the width direction of the vibration box 12, and a vertical spring arranged vertically. 33 and the pressure seat 34 rotatably connected to the vibration box 12, wherein one end of the transverse spring 32 abuts on the spring seat 31, and the other end abuts on the vibration box 12. Specifically, the spring seat 31 faces the vibration box 12. A long groove is opened on one side, and a plurality of transverse springs 32 arranged at equal intervals along the length direction of the long groove are arranged in the long groove. A rubber strip, a part of the rubber strip in the thickness direction is movably inserted into the long groove, and the rubber sleeve is closely attached to the outer side wall of the vibration box 12 . The lower end of the vertical spring 33 is fixedly connected to the spring seat 31 , and the upper end is pressed against or fixedly connected to the pressing seat 34 . It should be noted that, in order to improve the torsion resistance of the vertical spring 33, the outer diameter and wire diameter of the vertical spring 33 should be as large as possible.

The two power assemblies 20 have the same structure. Taking one of them as an example, the power assembly 20 includes a vibration motor 21 arranged on the vibration box 12, a flexible coupling 22 connected to the output shaft of the vibration motor 21, and a flexible coupling 22 connected to the output shaft of the vibration motor 21. The transmission shaft 23 on the shaft 22, the support bearing 24 sleeved on the transmission shaft 23, the bearing seat 25 sleeved on the support bearing 24, and two respectively located on both sides of the bearing seat 25 and fixedly sleeved on the transmission shaft 23 On the eccentric block 26, one of the eccentric blocks 26 is located directly below the vibration box 12 (that is, the projections of the two on the horizontal plane overlap), and the other eccentric block 26 is located below the side of the vibration box 12 (that is, the two are on the horizontal plane. The projections do not overlap), the eccentric directions of the two eccentric blocks 26 are the same, and the distances between the two eccentric blocks 26 and the corresponding side walls of the vibration box 12 are equal, so that the force is relatively stable. The bearing seat 25 is fixedly connected to the vibration box 12 . During use, driven by the vibration motor 21, the eccentric block 26 rotates, and the vibration box 12 is driven to vibrate through the bearing seat 25 under the action of centrifugal force.

The upper end of the vibration box 12 has an upper opening, and the upper cover of the upper opening is provided with a dust collecting hood, and the upper end of the dust collecting hood is connected with a dust collecting pipe 40. Preferably, in this embodiment, there are two dust collecting hoods, which are respectively The first dust collecting hood 41 and the second dust collecting hood 42 are sequentially arranged from the relatively lower end of the vibration box 12 to the other end, and cover the upper opening together. A first branch pipe 43 is connected between the first dust collecting hood 41 and the pipe body of the dust collecting pipe 40, and a second branch pipe 44 is connected between the second dust collecting hood 42 and the end of the dust collecting pipe 40, so as to ensure the first A dust hood 41 has a relatively large suction force, forming an effect similar to an air curtain, preventing light materials from entering the storage bin or storage channel. Preferably, the second branch pipe 44 is a Venturi tube or a Venturi tube is interspersed in its interior. The Venturi tube helps to speed up the flow of gas, so as to quickly suck away the light substances that have just entered the vibration box 12 and improve the sorting efficiency. At the same time, it is helpful to avoid the light substances floating in the vibration box 12 or sticking to the inner side wall of the vibration box 12 for a long time.

One end of the dust collecting pipe 40 away from each dust collecting hood is connected with a cyclone dust collector 50. The cyclone dust collector 50 can be a conventional cyclone dust collector. Preferably, in this embodiment, the cyclone dust collector 50 includes an upper casing 51, a fixed A blanking hopper 52 connected to the lower end of the upper casing 51 and the inner cavity of which is communicated with the inner cavity of the upper casing 51, a star-shaped discharge valve 53 installed at the lower end of the blanking hopper 52, and a vertical discharge valve 53 arranged vertically and inserted into the upper casing 51 at the same time and the air outlet duct 54 in the hopper 52, wherein the side wall of the upper casing 51 is provided with an air inlet, and the structures of the upper casing 51, the hopper 52 and the star-shaped discharge valve 53 and their specific connection structures are all The same as the conventional cyclone dust collector, the difference between the cyclone dust collector 50 provided in this embodiment and the conventional cyclone dust collector is mainly described here. The air inlet of the upper casing 51 is connected with a spiral air inlet pipe 55. , the air inlet pipe 55 is connected with the dust collecting pipe 40, so that the air flow can generate a swirl before entering the inner cavity of the upper casing 51, so as to improve the sorting efficiency. A spiral baffle is also provided to form a small swirling flow in different directions in the large swirling flow, so that the light substances mixed in the airflow can quickly collide with each other and fall after entering the inner cavity of the upper shell 51, which further improves the sorting. efficiency. In addition, the upper end of the air outlet pipe 54 is located above the upper casing 51, the lower end is located near the star-shaped discharge valve 53, and the lower part of the pipe wall of the air outlet pipe 54 is provided with a plurality of ventilation holes (not shown in the figure). Preferably, the diameter of the part of the air outlet pipe 54 that penetrates into the hopper 42 gradually decreases from top to bottom, and the ventilation holes are opened on the part where the diameter of the air outlet pipe 54 gradually decreases. When in use, the airflow entering the inner cavity of the upper casing 51 first swirls in the inner cavity of the upper casing 51 and enters the blanking hopper 52. The swirling airflow shrinks toward the center in the blanking hopper 52, and enters the air outlet duct 54 through the ventilation hole. , forming a secondary swirling flow that moves upward, and is finally discharged from the upper end of the air outlet pipe 54. During this process, relatively large substances first collide with each other in the inner cavity of the upper casing 51 and the hopper 52 or collide with the upper casing. 51 or the blanking hopper 52 hits and falls under the action of gravity, the airflow will also come to some light substances in the process of entering the blanking hopper 52 from the ventilation hole, and after the airflow enters the air outlet duct 54, centrifugal force and gravity can be used again. The material with relatively small particles is thrown out, and is not affected by the disturbance of the airflow in the hopper 52, which greatly improves the air separation efficiency.

The air outlet of the cyclone dust collector 50 is connected to a pulse dust collector 60, the air outlet of the pulse dust remover 60 is connected to an induced draft fan 61, and the air outlet of the induced draft fan 61 is connected to a vertically arranged chimney 62, which helps to further remove the air flow. Contains tiny particles to avoid polluting the atmosphere. Preferably, a muffler 63 is connected between the air outlet of the induced draft fan 61 and the chimney 62 to reduce emission noise.

The present invention has been described in detail above in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited to the above-mentioned embodiments. Those skilled in the art can make various modifications to the present invention according to the prior art, which all belong to the protection scope of the present invention. .

Claims (9)

1. The utility model provides a construction waste screening equipment, includes the vibration screening machine, its characterized in that, the vibration screening machine includes the frame, sets up vibrating bin, fixed connection in the frame are in screening net in the inner chamber of vibrating bin and be used for the drive the power component of vibrating bin vibration, the upper end of vibrating bin has the upper shed, the upper shed upper shield is equipped with the dust cage, the upper end of dust cage is connected with the dust leg, the dust leg is kept away from the one end of dust cage is connected with cyclone, cyclone's air outlet is connected with pulse dust collector, pulse dust collector's air outlet is connected with the draught fan, the air outlet of draught fan is connected with the vertical chimney of arranging.

2. The construction waste screening device according to claim 1, wherein the vibrating box and the screening net are arranged to be gradually inclined downward from one end to the other end in the length direction thereof, the number of the power assemblies is two, the two power assemblies are respectively and symmetrically arranged on both sides in the width direction of the vibrating box, the frame is provided with spring assemblies respectively arranged on both sides of the vibrating box at positions corresponding to both ends in the length direction of the vibrating box, the vibrating box is arranged on the frame through the spring assemblies, the spring assemblies comprise a spring seat fixed on the frame, a transverse spring arranged in parallel with the width direction of the vibrating box, a vertical spring arranged vertically and a pressing seat rotatably connected to the vibrating box, one end of the transverse spring abuts against the spring seat, and the other end abuts against the vibrating box, the lower end of the vertical spring is fixedly connected to the spring seat, and the upper end of the vertical spring abuts against the pressing seat.

3. The construction waste screening apparatus as claimed in claim 2, wherein there are two dust hoods, which are a first dust hood and a second dust hood, respectively, the first dust hood and the second dust hood are sequentially disposed from a relatively lower end of the vibration box to the other end, a first branch pipe is connected between the first dust hood and the pipe body of the dust pipe, and a second branch pipe is connected between the second dust hood and the end of the dust pipe.

4. The vibration absorbing waste screening apparatus of claim 3, wherein said second branch conduit is a venturi tube.

5. The construction waste screening device according to claim 1, wherein the power assembly includes a vibration motor disposed on the vibration box, a flexible coupling connected to an output shaft of the vibration motor, a transmission shaft connected to the flexible coupling, a support bearing sleeved on the transmission shaft, a bearing seat sleeved on the support bearing, and two eccentric blocks respectively disposed on two sides of the bearing seat and fixedly sleeved on the transmission shaft, the two eccentric blocks have the same eccentric direction, and the bearing seat is fixedly connected to the vibration box.

6. The construction waste screening device according to claim 1, wherein the cyclone dust collector comprises an upper housing, a blanking hopper fixedly connected to a lower end of the upper housing and having an inner cavity communicated with an inner cavity of the upper housing, a star discharge valve installed at a lower end of the blanking hopper, and an air outlet pipe vertically arranged and simultaneously inserted into the upper housing and the blanking hopper, wherein an air inlet is formed in a side wall of the upper housing, a spiral air inlet pipe is connected to the air inlet, the air inlet pipe is connected to the dust collecting pipe, an upper end of the air outlet pipe is located above the upper housing, a lower end of the air outlet pipe is located at a position close to the star discharge valve, and a plurality of air ventilation holes are formed in a lower portion of a pipe wall of the air outlet pipe.

7. The construction waste screening apparatus as claimed in claim 6, wherein the diameter of the portion of the outlet duct penetrating into the drop hopper is gradually reduced from top to bottom.

8. The construction waste screening apparatus as claimed in claim 5, wherein the inner side wall of the air inlet duct is further provided with a spiral baffle.

9. The construction waste screening device of claim 1, wherein a silencer is connected between an air outlet of the induced draft fan and the chimney.

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