CN113247649B - Dust-fall air pipe device, dust-fall chute device and dust-fall method - Google Patents

Abstract

The invention relates to a dust-settling air pipe device, a dust-settling chute device and a dust-settling method, wherein the dust-settling air pipe device comprises a dust-settling air pipe, a diversion trench and a downstream receiving trench; the diversion trench is communicated with the downstream receiving groove, and the dust falling air pipe is communicated with the diversion trench and the downstream receiving groove. According to the invention, the dust-settling air pipe is communicated between the diversion trench and the downstream receiving trench, the granular materials flow forwards along the diversion trench and enter the downstream receiving trench, and the space occupied by the materials after the materials flow forwards in the rear section area of the diversion trench is vacated, and the local part is negative pressure; when unloading to low reaches receiving groove surface along the guiding gutter, the material produces the raise dust when becoming static by the motion, this part dusty air receives guiding gutter back end negative pressure suction effect to return backward along the dust fall tuber pipe and flows, the dusty air of backward flow fills to this region under the regional negative pressure suction effect of guiding gutter back end to ensure that dust fall tuber pipe and low reaches receive the silo and form that the confined space internal pressure is balanced, the air does not have excessive power, form the inner loop and fall the dust certainly, it is more effective, the environmental protection and save raw and other materials.

Description

Dust-settling air pipe device, dust-settling chute device and dust-settling method

Technical Field

The invention relates to the technical field of powder material transportation, in particular to a dust-settling air pipe device, a dust-settling chute device and a dust-settling method.

Background

As for fragile and powdery materials such as lump coal, coke, chemical fertilizer, grain and the like, the transportation in the vertical direction is inevitably required in the process of industrial production, and when the height difference is large, the material fall is too large, and the acceleration time under the action of dead weight is long, so that the material receiving surface of downstream material receiving equipment can not avoid generating great impact, the damage to the powdery and granular materials is serious, the noise pollution is caused, the dust is greatly raised, the production environment is seriously damaged, and the production safety is seriously damaged.

Aiming at the problems, the problems are mainly solved by adopting a vertical conveying machine and a mode of arranging inclined chutes in the existing engineering production. For example, vertical conveying machinery such as a bucket elevator is adopted, the problems of small conveying capacity, high chain failure rate, additional power supply distribution and high operation and maintenance cost and the like exist in the process of conveying materials by virtue of a hopper and a chain, and although the problems of serious damage and noise pollution of powder and granular materials are relieved to a certain extent, the effective and environment-friendly solution for generating the problem of great dust raising is not provided all the time, and raw materials are saved. For example, a Chinese patent 'screw conveyor' (CN 2018101178245) relates to the field of dust removal equipment, and provides a screw conveyor with long service life and better dust removal effect. The ash discharging device comprises a conveyor body and bearings arranged at two ends of the conveyor body, wherein an ash discharging opening is formed in the bottom of the conveyor body, which is close to the bearings, a movable chute is connected to the ash discharging opening, and a balancing weight is arranged at one end, which is not connected with the ash discharging opening, of the chute; an isolating layer is arranged between the ash discharge port and the bearing. The isolating layers are arranged in front of the bearings at two ends of the spiral conveyor at intervals, so that dust raised by the operation of the spiral is prevented from entering the bearings and then discharged through the dust discharge port, and the dust discharge port can be opened and closed through the chute; when the spiral conveyor rotates, the counterweight block continuously beats the machine body under the action of gravity, so that dust adhered to the interior of the machine body can be shaken off, and the dust removal effect is greatly improved; the invention can not only prevent the bearing from being damaged due to ash feeding, prolong the service life of the screw conveyer, save the production cost, but also enable the ash removal of the screw conveyer to be more thorough. Although the patent mentions that the bottom of the conveyor body close to the bearing is provided with the ash discharge port, the dust is discharged and removed directly outwards, and the dust is not recovered and collected, so that the method does not belong to an effective, environment-friendly and raw material-saving solution. Therefore, improvement is urgently needed.

Disclosure of Invention

One of the purposes of the invention is to provide a dust-settling air pipe device, which solves the technical problem of great dust emission in the transportation process of granular materials.

The scheme for solving the technical problems is as follows: a dust-fall air pipe device is used for recovering and collecting raised dust in a downstream receiving groove and comprises a dust-fall air pipe, a diversion groove and the downstream receiving groove;

the discharge hole of the guide groove is communicated with the feed inlet of the downstream material receiving groove, and two ends of the dust falling air pipe are respectively communicated with the guide groove and the downstream material receiving groove.

Furthermore, the two ends of the dust falling air pipe are respectively communicated with the side wall of the guide groove and the side wall of the downstream material receiving groove.

Further, the end of giving vent to anger of dust fall tuber pipe is close to the feed inlet of guiding gutter.

Further, the downstream receiving groove is in a closed state.

Furthermore, a filter for absorbing granular dust is arranged in the dust falling air pipe.

Furthermore, one end of the dust falling air pipe is provided with a plurality of attenuation air pipes which are used for being communicated with the side wall of the downstream receiving groove.

Furthermore, the feed end of each attenuation air pipe is provided with a dust hood, and the feed end of each attenuation air pipe is communicated with the side wall of the downstream receiving groove through the dust hood.

Further, an air locking valve is arranged at the feed inlet of the flow guide groove.

Furthermore, the airlock valve is a flap airlock valve, the flap airlock valve comprises 2 counter weights, a shell and 2 flaps, the 2 counter weights are symmetrically and rotatably connected to two sides of the shell respectively, one end of each counter weight, which is located in the shell, is fixed with a flap, the 2 flaps are in a normally closed state under a non-working normal state due to the gravity action of the counter weights, and the 2 flaps are opened under the working state due to the pressing of materials.

Furthermore, the flap latch valve further comprises a rotating shaft and a swinging arm, each balancing weight is rotatably connected to one side of the shell through one rotating shaft, and one end of each balancing weight, which is positioned in the shell, is fixedly connected with the flap through the swinging arm.

Furthermore, the discharge end of the dust-settling air pipe is provided with an air return pipe communicated with the side wall of the guide groove.

The beneficial effects of the invention are: the invention provides a dust-settling air pipe device which is simple in structure and ingenious in design, wherein a dust-settling air pipe is communicated between a diversion trench and a downstream receiving trench, powder and granular materials flow forwards along the diversion trench and enter the downstream receiving trench, and the rear section area of the diversion trench is vacated due to the space occupied by the materials after flowing forwards, so that a negative pressure state is formed locally; when the materials are discharged to the surface of the downstream receiving groove along the diversion trench, the materials generate dust in the process of converting motion into static state, the part of dust-containing air returns backwards along the dust-falling air pipe under the negative pressure suction effect of the rear section of the diversion trench, the speed attenuation of coarse dust particles gradually falls back to the surface of the downstream receiving groove under the action of self weight in the rising process, fine dust is slightly influenced by self weight and continuously returns backwards to flow to the rear section of the diversion trench under the pushing of air to be collected, the raised dust-containing air is purified through the gravity attenuation and negative pressure suck-back effect of the coarse dust particles, the purified clean air is filled to the area under the negative pressure suction effect of the rear section of the diversion trench, so that the pressure balance in a closed space formed by the dust-falling air pipe and the downstream receiving groove is ensured, no overflow power of air is generated, the internal circulation self-falling dust is formed, the raised dust in the downstream receiving groove is recovered and collected, the technical problem that the raised dust is generated in the transportation process of the granular materials is solved, and the technical problem that the raised dust is greatly generated in the transportation process of the granular materials is more effective, environmental protection and the raw materials is solved.

The invention also aims to provide a dust fall chute device.

The technical scheme is as follows:

the utility model provides a dust fall chute device, dust fall chute device includes charge-in pipeline and dust fall tuber pipe device, charge-in pipeline's both ends are from last to being equipped with feed inlet and discharge gate down in proper order, the discharge gate with the feed inlet intercommunication of guiding gutter.

Further, the feeding pipeline is a spiral pipeline.

Further, the spiral pipeline comprises a first flow guide side plate, an upper cover plate, a second flow guide side plate and a bottom support plate which are sequentially connected in a surrounding mode to form a pipeline, the first flow guide side plate is located on one side close to the central axis of the spiral pipeline, the second flow guide side plate is located on one side away from the central axis of the spiral pipeline, and one side, connected with the second flow guide side plate, of the bottom support plate and one side, connected with the first flow guide side plate, of the bottom support plate are arranged in a mode of inclining from top to bottom.

Further, the width of the first flow guide side plate in the vertical direction is the same as the width of the second flow guide side plate in the vertical direction, and the height of the upper edge of the first flow guide side plate is higher than that of the upper edge of the second flow guide side plate.

The invention also aims to provide a dust settling method.

The technical scheme is as follows:

a dust fall method is characterized in that a dust fall air pipe device is applied to recovering and collecting raised dust in a downstream receiving groove to a diversion trench.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to make the technical solutions of the present invention practical in accordance with the contents of the specification, the following detailed description is given of preferred embodiments of the present invention with reference to the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic structural diagram of a dust fall chute device according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a dust settling air pipe in the dust settling chute device provided in fig. 1;

FIG. 3 is an enlarged view of a portion of a spiral duct of the dust chute apparatus provided in FIG. 1;

fig. 4 is a schematic structural view of a flap air-lock valve in the dust fall chute device provided in fig. 1 in a closed state;

fig. 5 is a schematic structural view of a flap air-lock valve in the dust fall chute device provided in fig. 1 in an open state;

fig. 6 is a schematic structural diagram of a bracket in the dust fall chute device provided in fig. 1;

fig. 7 is a schematic structural diagram of a support column in the dust fall chute device provided in fig. 1;

fig. 8 is a view of the support column in the dust chute apparatus of fig. 1 in direction a.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a helical conduit; 1-1, a feed inlet; 1-2, a first flow guide side plate (inner side); 1-3, an upper cover plate; 1-4, a bottom bearing plate; 1-5, a discharge hole; 1-6, a second flow guide side plate (outer side); 2. a support; 2-1, clamping plate; 2-2, a cross brace; 2-3, an inclined strut; 2-4, fixing plates; 2-5, connecting plates; 3. a column; 3-1, a pipe column; 3-2, reinforcing rib plates; 3-3, connecting plates; 3-4, fastening pieces; 4. a vibrator; 5. a flap air-lock valve; 5-1, a counterweight rod; 5-2, a balancing weight; 5-3, rotating shaft; 5-4, a shell; 5-5, swinging arms; 5-6, turning over the board; 6. a material level detector; 7. a dust-settling air pipe; 7-1, Y-shaped air pipes; 7-2, a return air pipe; 7-3, a filter; 7-4, an attenuation air pipe; 7-5, transition section; 7-6, a dust hood; 8. a diversion trench; 8-1, a guide groove bottom bearing plate; 8-2, a diversion trench side plate; 8-3, an upper cover plate of the diversion trench; 9. a downstream receiving trough; 10. a conveyor belt; 11. and (7) mounting a base.

Detailed Description

The principles and features of the present invention are described below in conjunction with the accompanying fig. 1-8, which are provided as examples to illustrate the invention and not to limit the scope of the invention. The invention is more particularly described in the following paragraphs with reference to the accompanying drawings by way of example. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-8, the present invention provides a dust fall chute device, which comprises a feeding pipeline and a dust fall air pipe device, wherein two ends of the feeding pipeline are sequentially provided with a feeding port 1-1 and a discharging port 1-5 from top to bottom, and the discharging port 1-5 is communicated with a feeding port of a diversion trench 8.

Further, as shown in fig. 1, the feed pipe is a spiral pipe 1.

For easily broken powder and particle materials, such as lump coal, coke, chemical fertilizer, grain and the like, the powder and particle materials inevitably need to be transported in the vertical direction in the process of industrial production, and when the height difference is large, the material fall is overlarge and the acceleration time under the action of dead weight is long, so that the material receiving surface of downstream material receiving equipment cannot avoid generating great impact, and the powder and particle materials are seriously damaged. For those industries where the particle size requirements are stringent, this situation is unacceptable. In addition, because the vertical fall is large, when the material falls to the receiving surface of the downstream receiving groove 9, the material can generate great dust and noise pollution, and the production environment is seriously damaged and the production safety is seriously damaged.

Aiming at the problems, the existing engineering production is mainly solved by adopting a vertical conveying machine and a mode of arranging inclined chutes. The problems of smaller conveying capacity, high failure rate of chains, additional power supply, high operation and maintenance cost and the like exist in the process of conveying materials by adopting a vertical conveying machine such as a bucket elevator and the like through a hopper and the chains, and the phenomena of crushing and dust caused by local free falling motion of granular materials in the loading and unloading process are still serious. The problem that the chute is inclined is solved, the chute is influenced by material flowability, the inclined chute angle is strictly limited by a material operation stacking angle, a longer horizontal section is usually caused when the vertical height difference is larger, and the method is limited by a factory space and cannot be applied frequently.

Compared with mechanical conveying, the feeding pipeline is designed into the spiral pipeline 1, so that in the whole material flow moving process, the operation and control of personnel are not needed, extra power is not needed, the material moves by means of self weight, the influence of the operation level is avoided, mechanical faults are avoided, the operation cost is low, the damage reduction effect and the noise effect are constant; compared with the inclined chute conveying in the prior art, the inclined chute conveying device has the advantages of small occupied space, flexible arrangement, convenience in adjustment and strong applicability.

Further, as shown in fig. 1 and 6-8, in order to support the spiral pipeline 1 and enable the overall structure to be more stable, the dust fall chute device further comprises a stand column 3 and a plurality of supports 2, the stand column 3 comprises a pipe column 3-1, reinforcing rib plates 3-2, connecting plates 3-3 and fasteners 3-4, wherein the pipe column 3-1 is a hollow steel pipe, the connecting plates 3-3 are concentric circular discs, bolt holes are uniformly formed in the connecting plates 3-3 and used for fixing with a plant foundation, the plant foundation is a mounting base 11, and the reinforcing rib plates 3-2 are uniformly distributed around the pipe column 3-1 and respectively welded and fixed with the vertical pipe column 3-1 and the ground connecting plates 3-3, so that the stability of the pipe column 3-1 is enhanced, and the outer vertical surface of the pipe column 3-1 is welded with the angular supports 2 and used for bearing the load of the spiral joint 1 and the material flow load.

As shown in figure 6, the support 2 is in a right-angled triangle shape and comprises a clamping plate 2-1, a cross brace 2-2, an inclined brace 2-3, a fixing plate 2-4 and a connecting plate 2-5, the vertical right-angle side of the angular support 2 is welded with the outer vertical surface of the upright post 3, the horizontal right-angle side of the angular support 2 is welded with the bottom bearing plate 1-4 of the spiral section 1, the flow guide side plate 1-2 is reinforced through the clamping plate 2-1 to resist deformation, the clamping plate 2-1, the cross brace 2-2 and the inclined brace 2-3 are all made of profile steel, and the connecting plate 2-4 and the fixing plate 2-5 are made of steel plates.

Further, as shown in fig. 3, the spiral duct 1 includes a first flow guide side plate 1-2, an upper cover plate 1-3, a second flow guide side plate 1-6 and a bottom support plate 1-4 which are sequentially connected in a surrounding manner to form a duct, the first flow guide side plate 1-2 is located at one side close to the central axis of the spiral duct 1, the second flow guide side plate 1-6 is located at one side away from the central axis of the spiral duct 1, and one side of the bottom support plate 1-4 connected with the second flow guide side plate 1-6 is obliquely arranged from top to bottom at one side of the bottom support plate 1-4 connected with the first flow guide side plate 1-2.

It should be understood that, the feed end of spiral pipe 1 links up the upper reaches equipment discharge point, the welding position is welded firmly, flange joint position gasket is sealed, spiral pipe 1 links up the material with upper reaches equipment laminating and runs away the point and receives the material at the material, the material moves along the bottom of spiral section U type groove under inertia initial velocity effect, 1 radius gyration of spiral pipe, the angle, height developments are adjustable ensures that the material space atress is balanced, thereby do not produce acceleration effect in the operation process and greatly reduce the material and throw off, the breakage and the noise that the impact leads to, import flange and upper reaches equipment flange or the export flange bolted connection of last spiral section, export flange and the export flange bolted connection of downstream equipment flange or next spiral section.

The side, connected with the second flow guide side plates 1-6, of the bottom bearing plates 1-4 is arranged obliquely from top to bottom on the side, connected with the first flow guide side plates 1-2, of the bottom bearing plates 1-4, namely the bottom bearing plates 1-4 are inclined downwards towards the central axis of the spiral pipeline 1, so that powder and particle materials are ensured to flow along the bottom surface, impact on the side plates is small, no drop is generated in the operation process, and vibration damping and noise reduction are facilitated.

Further, as shown in fig. 3, the width of the first flow guide side plate 1-2 in the vertical direction is the same as the width of the second flow guide side plate 1-6 in the vertical direction, and the height of the upper edge of the first flow guide side plate 1-2 is higher than that of the upper edge of the second flow guide side plate 1-6.

The first flow guide side plate 1-2 and the second flow guide side plate 1-6 are designed to be the same in width, so that the symmetry of the overall structure is guaranteed, and the cross section of the spiral pipeline 1 is parallelogram, so that the stability of the overall structure is guaranteed.

The dust-fall air pipe device is used for recovering and collecting the raised dust in the downstream material receiving groove 9 and comprises a dust-fall air pipe 7, a diversion trench 8 and the downstream material receiving groove 9; the discharge hole of the diversion trench 8 is communicated with the feed inlet of the downstream receiving groove 9, and two ends of the dust falling air pipe 7 are respectively communicated with the diversion trench 8 and the downstream receiving groove 9.

It will be appreciated that the transport of the granular particles away is facilitated by the sealing arrangement of a conveyor belt 10, as shown in figure 1, below the downstream chute 9.

The dust-settling air pipe device provided by the embodiment has a simple structure and is ingenious in design, the dust-settling air pipe 7 is communicated between the guide groove 8 and the downstream receiving groove 9, the granular materials flow forwards along the guide groove 8 and enter the downstream receiving groove 9, and the rear section area of the guide groove 8 is vacated due to the space occupied by the materials after flowing forwards, so that a negative pressure state is formed locally; when the dust is discharged to the surface of the downstream receiving groove 9 along the diversion trench 8, the material generates dust in the process of converting motion into a static state, the part of dust-containing air returns backwards along the dust-removing air pipe 7 under the negative pressure suction effect of the rear section of the diversion trench 8 and flows, the speed attenuation of coarse dust particles gradually falls back to the surface of the downstream receiving groove 9 under the action of self weight in the ascending process of the coarse dust particles, fine dust is slightly influenced by self weight and continuously returns backwards to flow to the rear section of the diversion trench 8 under the pushing action of air to be collected, the raised dust-containing air is purified through the gravity attenuation of the coarse particles and the negative pressure suck effect, the purified clean air is filled to the region under the negative pressure suction effect of the rear section of the diversion trench 8, so that the pressure balance in a closed space formed by the air pipe 7 and the downstream receiving groove 9 is ensured, no overflow power of air exists, the internal circulation self-dust-collecting device is formed, the dust-raising in the downstream receiving groove 9 is recovered and collected, the technical problem that the large dust is effectively, environment is solved, and raw materials are greatly generated in the transportation process of the dust-raising materials in the transportation process of the powder-like.

Further, in order to facilitate manufacturing and installation and better flow, transmission and purification of raised dust, two ends of the dust falling air pipe 7 are respectively communicated with the side wall of the guide groove 8 and the side wall of the downstream receiving groove 9. Obviously, the end of the dust settling air pipe 7 communicated with the side wall of the diversion trench 8 is an air outlet end, and the end of the dust settling air pipe 7 communicated with the side wall of the downstream receiving trench 9 is an air inlet end. Preferably, the air outlet end of the dust falling air pipe 7 is close to the feed inlet of the flow guide groove 8, because the powder material at least facilitates the formation of negative pressure, so as to facilitate the gas transmission.

Further, in order to further improve the dust fall effect and the environmental protection and sanitation, the downstream receiving groove 9 is in a closed state.

Further, a filter 7-3 for absorbing the granular dust is arranged in the dust falling air pipe 7.

The filter 3 comprises a filter element and connecting flanges on two sides, the filter 3 is connected with a Y-shaped air pipe 7-1 and an attenuation air pipe 7-4 through flanges, an included angle between a vertical section and a horizontal section of the Y-shaped air pipe 7-1 along the air flow running direction is not more than 60 degrees, smooth air flow running is ensured, the filter element is made of a film-coated needled felt, and the filter 3 can be detached and needs to regularly remove adhered dust and recycle the dust.

Furthermore, the main body of the dust falling air pipe 7 is a Y-shaped air pipe 7-1, one end of the dust falling air pipe 7 is provided with a plurality of attenuation air pipes 7-4 which are used for being communicated with the side wall of the downstream receiving groove 9, and the attenuation air pipes are uniformly distributed in the vertical direction, so that the dust air flow is ensured to have enough speed attenuation space in the vertical direction. A filter 7-3 is associated with each damping air duct 7-4 in the Y-duct 7-1.

Furthermore, the feed end of each attenuation air pipe 7-4 is provided with a dust hood 7-6, and the feed end of each attenuation air pipe 7-4 is communicated with the side wall of the downstream receiving groove 9 through the dust hood 7-6.

Furthermore, the feeding end of each attenuation air pipe 7-4 is fixedly connected with the dust hood 7-6 through a transition joint 7-5.

Further, the feed inlet of the diversion trench 8 is provided with an air locking valve.

The air locking valve is arranged at the feed inlet of the guide groove 8, when more granular particles are not needed to be conveyed downwards, the air locking valve is started to seal, so that a closed space is formed between the feed inlet of the guide groove 8 and the downstream material receiving groove 9, and a negative pressure environment can be formed at the rear section of the guide groove 8, namely the feed inlet close to the guide groove 8, so that air containing dust can be returned to the rear section of the guide groove 8 from the downstream material receiving groove 9.

Of course, the air lock valve is known in the prior art by those skilled in the art, and the specific structure thereof is not specifically described.

Further, as shown in fig. 4-5, the air-lock valve may be designed as a flap air-lock valve 5, the flap air-lock valve 5 includes 2 counter weights 5-2, a housing 5-4 and 2 flaps 5-6, the 2 counter weights 5-2 are respectively and symmetrically and rotatably connected to two sides of the housing 5-4, one end of each counter weight 5-2 located in the housing 5-4 is fixed with a flap 5-6, the 2 flaps 5-6 are in a normally closed state under the normal non-working state due to the gravity of the counter weight 5-2, and the 2 flaps 5-6 are opened under the gravity of the material in the working state. The working state is a state when the granular materials flow from top to bottom. The non-operating normal state is a state where no granular material passes through.

As shown in fig. 1, 4 and 5, the turning plate air locking valve 5 divides the spiral chute device into an upper layer space and a lower layer space, the balancing weight 5-2 rotates at one side of the shell 5-4, a fixed lever ratio is kept between the balancing weight 5-2 and the turning plate 5-6, the balancing weight 5-2 ensures that the turning plate 5-6 is closed when the materials are initially received, and the turning plate 5-6 can be timely turned down when the materials are accumulated to a certain weight.

Further, as shown in fig. 1, 4 and 5, in order to facilitate replacement and enhance the stability of the whole structure, the flap latch valve 5 further comprises a rotating shaft 5-3 and a swinging arm 5-5, each counterweight 5-2 is rotatably connected to one side of the housing 5-4 through a rotating shaft 5-3, and one end of each counterweight 5-2 located in the housing 5-4 is fixedly connected with the flap 5-6 through the swinging arm 5-5.

The flap air-lock device 5 is of a central symmetry structure and further comprises a balance weight rod 5-1 and a flap 5-6, wherein the flap 5-6, the swing arm 5-5 and the balance weight rod 5-1 are connected into a whole and swing by taking the swing shaft 5-3 as a center, and the length of the balance weight rod 5-1 and the length of the swing arm 5-5 keep a fixed lever ratio. The counterweight 5-2 is connected with the counterweight rod 5-1 in a locking mode, and the counterweight rod 5-1 is fixedly connected with the swing arm 5-5.

As shown in fig. 1, 4 and 5, the lengths of the balance weight rod 5-1 and the swing arm 5-5 are kept at a fixed lever ratio, the balance weight 5-2 is hung on the balance weight rod 5-1 to ensure that the turning plate 5-6 is sealed when the materials are initially received, the turning plate 5-6 can be timely turned down when the materials are accumulated to a certain weight, and the balance weight 5-2 is a lock type and can be increased or decreased according to the operation condition so as to ensure that the turning plate 5-6 can timely and effectively separate the space and can not cause material flow blockage.

The inlet and the outlet of the turning plate airlock 5 are respectively connected with a flange of the spiral pipeline 1 and a flange of the dust-settling air pipe 7, the turning plates 5-6 are symmetrical along the center, the spiral chute device is divided into an upper layer space and a lower layer space, when materials borne on the upper surface of the turning plates 5-6 exceed the proportion of the counter weight, the turning plates 5-6 rotate downwards around the rotating shafts 5-3 to start unloading, the initial closed state is recovered after the unloading process is completed, the intermittent unloading and space division effects are formed in such a circulating mode, dust airflow formed on the upper surfaces of the turning plates 5-6 in the upper layer space after the division is gradually attenuated under the action of gravity along the countercurrent of the spiral pipeline 1, so that the dust airflow is settled on the bottom bearing plates 1-4 of the spiral pipeline 1 and is wrapped and clamped downwards to be conveyed, and dust raising of the materials in the lower layer space after the division is subjected to dust-settling treatment from the dust-settling air pipe 7.

The swing mechanism swings by taking a rotating shaft 5-3 as a center, the length of a balance weight rod 5-1 and a swing arm 5-5 keeps a fixed lever proportion, a balance weight 5-2 is hung on the balance weight rod 5-1 to ensure that a turning plate 5-6 is sealed when materials are initially received, the turning plate 5-6 can be timely turned down when the materials are accumulated to a certain weight, and the balance weight 5-2 is a lock type and can be increased or decreased according to the operation condition so as to ensure that the turning plate 5-6 can timely and effectively separate a space and cannot cause material flow blockage.

It should be noted that the inlet and outlet of the flap airlock 5 are connected with the outlet flange of the spiral pipeline 1 and the inlet flange of the self-dust-settling air pipe 7 respectively, the flaps 5-6 are symmetrical along the center, the spiral chute device is divided into an upper space and a lower space, when the material carried on the upper surface of the flaps 5-6 exceeds the counterweight 5-2, the flaps 5-6 rotate downwards around the rotating shaft 5-3 to start unloading, the initial closed state is recovered after the unloading process is completed, the intermittent unloading and space division are formed in a circulating manner, the dust airflow formed on the upper surface of the flaps 5-6 in the upper space after the division is gradually attenuated under the action of gravity along the reverse flow of the spiral section, so that the dust airflow settles on the bottom bearing plate 1-4 of the spiral section 1 and is wrapped by the material flow to be conveyed downwards, and the dust falling of the material in the lower space after the division is treated by the self-dust-settling air pipe 7.

Further, a return air pipe 7-2 communicated with the side wall of the diversion trench 8 is arranged at the discharge end of the dust falling air pipe 7.

It should be understood that the spiral pipeline 1 circles round along the center of the upright post 3 to form a chute, the outer side of the chute is high, the inner side of the chute is low, the spiral pipeline 1 is totally closed and is composed of an inlet flange (not shown), an upper cover plate 1-3, a first flow guide side plate 1-2, a bottom support plate 1-4, a second flow guide side plate 1-6 and an outlet flange, the upper cover plate 1-3 adopts visible glass fiber reinforced plastic materials for monitoring the material running state in real time so as to be adjusted in time, the outer layer of the flow guide side plate adopts a carbon steel plate, the middle layer is laid with a stainless steel plate, the inner layer is laid with a rubber plate, and the bottom support plate 1-4 adopts a carbon steel plate as the bottom layer and the surface layer is laid with a ceramic material; the two chute flow guide side plates adopt a form of a mother plate, a lining plate and a buffer layer, wherein the outer mother plate adopts a carbon steel plate with the thickness of 10mm, the buffer inner layer aiming at noise reduction adopts a rubber plate with the thickness of 20mm, and the middle lining plate aiming at abrasion prevention is made of a stainless steel plate with the thickness of 8 mm. The chute bottom bearing plate 1-4 adopts a form of a mother plate and a lining plate, wherein the mother plate adopts a carbon steel plate with the thickness of 12mm, and the lining plate for preventing abrasion is made of a wear-resistant steel plate with the thickness of 10 mm; and the functional layers are fixed on the motherboard through countersunk screws. Thereby improving the service life of the chute device, ensuring stable operation, buffering the vibration of the chute and increasing the noise absorption; the structure setting that spiral pipeline 1 is high inside and low outside ensures that the powder material flows along the bottom surface, and the side plate is strikeed for a short time, and the operation process does not have and throws down, also is favorable to slow vibration to fall and makes an uproar.

An inlet of a diversion trench 8 of the dust-settling air pipe 7 is welded with the flap airlock 5, an outlet of the dust-settling air pipe 7 is welded with a downstream equipment material guide trench, a flange is arranged on a horizontal side inlet and an outlet of a Y-shaped air pipe 7-4, a bottom inlet is a straight pipe without a flange and is welded with a transition joint 7-8, a return air pipe 7-5 consists of a straight section and an arc section, the straight section is welded on an upper cover plate of the diversion trench 8 and is used for balancing return air pressure, the arc section is connected with a filter 7-6, an upper opening of the transition joint 7-8 is circular, a lower opening of the transition joint 7-8 is welded with an attenuation air pipe 7-7 and a dust hood 7-9, the dust hood 7-9 is in a frustum shape, an upper opening of the transition joint 7-8 is welded with a lower opening of the top of the downstream equipment material guide trench, and the bottom straight pipes 7-4 of the Y-shaped air pipe and the attenuation air pipe 7-7 are uniformly arranged in a vertical direction to ensure that dust air flow has enough velocity attenuation space in the vertical direction.

The inlet of a diversion trench of the dust-settling air pipe 7 is welded with the flap air-lock valve 5, the outlet of the dust-settling air pipe is welded with the downstream material-receiving groove 9, the horizontal side inlet and the horizontal side outlet of the Y-shaped air pipe 7-1 are provided with flanges, the bottom inlet is a straight pipe without a flange and is welded with the transition joint 7-5, the return air pipe 7-2 consists of a straight section and an arc section, the straight section is welded on an upper cover plate 8-3 of the diversion trench and is used for balancing return air pressure, the arc section is connected with a filter, the upper opening of the transition joint is circular and the lower opening of the transition joint is square and is welded with the attenuation air pipe 7-4 and the dust hood 7-6, the dust hood 7-6 is in a frustum shape, the upper opening is welded with the transition joint 7-5, the lower opening is welded with the top of the downstream material-receiving groove, and the straight pipe and the attenuation air pipe at the bottom of the Y-shaped air pipe are uniformly distributed in the vertical direction to ensure that the dust air flow has enough speed attenuation space in the vertical direction.

The invention also provides a dust settling method, the dust settling air pipe device is applied to the recovery and collection of the dust in the downstream receiving groove 9 to the diversion trench 8, the dust settling air pipe device is more effective and environment-friendly, raw materials are saved, and the technical problem that the dust is greatly raised in the transportation process of the granular materials is solved.

The vibrator 4 is arranged on the bottom bearing plate 1-4 of the last section of the spiral pipeline 1, is welded with the outer surface of the bottom bearing plate 1-4, and is connected to a remote factory normally-arranged centralized control room through signal wiring in an electric driving mode and an operating state to realize remote control.

The material level detector 6 adopts a rotation-resistant material level form, and immediately sends out an alarm signal when the material level on the turning plates 5-6 is accumulated to a trigger material level alarm value, and is connected to a remote factory normally-arranged centralized control room through signal wiring to realize remote material blockage alarm.

The vibrator 4 and the material level detector 6 are controlled in an interlocking mode, and when a material blocking alarm signal is received, the loose material is started to enable the material to continuously flow to avoid forming blockage.

The specific working principle and the using method of the invention are as follows: after the turnover plate air locker 5 finishes an intermittent unloading period, the turnover plate 5-5 is closed again, and a sealed space is formed by the self-dust-falling air pipe 7 in the area below the turnover plate 5-6 and the fully-sealed guide chute of the downstream receiving chute 9; the materials enter a downstream receiving groove 9 along the dust falling air pipe 7 and the diversion trench 8, and the rear section area of the diversion trench 8 is vacated due to the space occupied by the materials after the materials flow forwards, so that a negative pressure state is formed locally; the material discharged to the surface of the downstream receiving groove 9 along the diversion trench 8 is converted from motion to static state to generate dust, the part of dust-containing air flows along the dust hood 7-9, the transition joint 7-8 and the attenuation air pipe 7-7 under the negative pressure suction effect of the rear section of the diversion trench 8, the speed of the coarse dust particles gradually attenuates under the self-weight effect in the ascending process and then falls back to the surface of the downstream receiving groove 9, fine dust particles are adhered to the filter 7-6 after being processed by the filter 7-6 and removed through regular dust cleaning, the raised dust-containing air is purified under the dual effects of gravity attenuation and filtration, and the purified clean air is filled to the region under the negative pressure suction effect of the rear section of the diversion trench 8, so that the pressure balance in the closed space formed by the dust-falling air pipe 7 and the downstream receiving groove is ensured, and the air has no overflow power, and the internal circulation self-dust-falling is formed.

The invention provides a dust fall chute device, wherein powder and granular materials start to be received after running from an upstream device, the curve of the receiving position is close to the parabola of the materials, the material flow can be well ensured to have almost no fall along the running of a bottom bearing plate 1-4, and an elastic material is lined on the surface of a flow guide side plate, so that the mutual impact of the powder and granular materials and the flow guide side plate is reduced. In addition, by adopting the rotary conveying, the turning plates 5-6 are separated, and the circulating air pipes are used for dust fall, so that the seamless closed connection with an upstream unloading device and a downstream receiving groove 9 is realized, the rotary angle is reasonably designed to enable granular materials to form a stress balance state under the action of self weight and frictional resistance, the conveying in the vertical direction is completed by means of inertia and initial speed, the continuous impact is changed into intermittent impact by the turning plates 5-6 to separate the groove section, the receiving surface is provided with the dust fall air pipes 7, the dust fall air pipes are gradually attenuated by dust particles under the action of self weight, and the crushing is greatly reduced by the transportation of the powder materials in the vertical direction, and the dust overflow is effectively controlled.

The chute device for transferring and conveying the powder-like materials, provided by the invention, overcomes the defects of the existing conveying mode of the powder-like materials under the condition of larger vertical height difference, and has the advantages of low operation cost, strong applicability, power saving, less interference factors, low failure rate, small occupied space, flexible arrangement, convenience in adjustment and environmental friendliness.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention may be readily implemented by those of ordinary skill in the art as illustrated in the accompanying drawings and described above; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.

Claims (4)

1. A dust fall air pipe device is used for recovering and collecting raised dust in a downstream material receiving groove (9), and is characterized by comprising a dust fall air pipe (7), a flow guide groove (8) and the downstream material receiving groove (9), wherein the air outlet end of the dust fall air pipe (7) is close to a material inlet of the flow guide groove (8), and the downstream material receiving groove (9) is in a closed state;

the discharge hole of the diversion trench (8) is communicated with the feed inlet of the downstream material receiving trench (9), the two ends of the dust falling air pipe (7) are respectively communicated with the diversion trench (8) and the downstream material receiving trench (9),

two ends of the dust falling air pipe (7) are respectively communicated with the side wall of the diversion trench (8) and the side wall of the downstream material receiving trench (9),

one end of the dust-falling air pipe (7) is provided with a plurality of attenuation air pipes (7-4) which are communicated with the side wall of the downstream material receiving groove (9), the feed end of each attenuation air pipe (7-4) is provided with a dust hood (7-6), the feed end of each attenuation air pipe (7-4) is communicated with the side wall of the downstream material receiving groove (9) through the dust hood (7-6),

the dust-fall air pipe (7) is internally provided with a filter (7-3) for absorbing granular dust, the filter core material of the filter (7-3) uses a film-coated needled felt, the main body of the dust-fall air pipe (7) is a Y-shaped air pipe (7-1), the Y-shaped air pipe (7-1) comprises a vertical section and a horizontal section, the included angle between the vertical section and the horizontal section of the Y-shaped air pipe (7-1) along the air flow running direction is not more than 60 degrees, so that the air flow is ensured to run smoothly, the horizontal section of the Y-shaped air pipe (7-1) is connected with an attenuation air pipe (7-4) through a filter (7-3) by flanges, the attenuation air pipes (7-4) are uniformly distributed in the vertical direction, so that the dust air flow has enough speed attenuation space in the vertical direction,

the discharge end of the dust-settling air pipe (7) is provided with an air return pipe (7-2) communicated with the side wall of the diversion trench (8), the air return pipe (7-2) consists of a straight section and an arc section, the straight section is welded on an upper cover plate of the diversion trench (8) and used for balancing the return air pressure, the arc section is connected with a filter (7-3),

an air locking valve is arranged at a feed inlet of the guide groove (8), the air locking valve is a turnover plate air locking valve (5), the turnover plate air locking valve (5) comprises two balancing weights (5-2), a shell (5-4) and two turnover plates (5-6), the two balancing weights (5-2) are respectively and symmetrically connected to two sides of the shell (5-4) in a rotating mode, the turnover plate (5-6) is fixed at one end, located in the shell (5-4), of each balancing weight (5-2), the two turnover plates (5-6) are in a normally closed state under the action of gravity of the balancing weights (5-2) in a non-working normal state, and the two turnover plates (5-6) are opened under the pressing of materials in a working state,

in order to facilitate replacement and enhance the stability of the integral structure, the flap air-lock valve (5) further comprises a rotating shaft (5-3) and a swinging arm (5-5), each balancing weight (5-2) is rotatably connected to one side of the shell (5-4) through the rotating shaft (5-3), one end of each balancing weight (5-2) positioned in the shell (5-4) is fixedly connected with the flap (5-6) through the swinging arm (5-5),

the flap air-lock valve (5) is of a central symmetrical structure and also comprises a balance weight rod (5-1) and a flap (5-6), the swing arm (5-5) and the balance weight rod (5-1) are connected into a whole and swing around a rotating shaft (5-3), the lengths of the balance weight rod (5-1) and the swing arm (5-5) keep a fixed lever proportion, the balance weight block (5-2) is connected to the balance weight rod (5-1) in a clamping and locking manner, the balance weight rod (5-1) is fixedly connected with the swing arm (5-5),

the inlet and the outlet of the flap air locking valve (5) are respectively connected with a flange of the dust fall chute device and a flange of the dust fall air pipe (7), the flap (5-6) divides the dust fall chute device into an upper layer space and a lower layer space, when materials borne by the upper surface of the flap (5-6) exceed a counterweight block proportion counterweight, the flap (5-6) rotates downwards around the rotating shaft (5-3) to start unloading, and the initial closed state is recovered after the unloading process is completed, so that the intermittent unloading and space division effects are formed in a circulating mode, dust airflow formed on the upper surface of the flap (5-6) in the upper layer space after the division is gradually attenuated under the action of gravity along the reverse flow of the dust fall chute device, so that the dust airflow is settled on the bottom plate of the dust fall chute device and is wrapped and clamped downwards to be conveyed, and material raise dust in the lower layer space after the division is treated by the dust fall air pipe (7),

the counterweight block (5-2) is hung on the counterweight rod (5-1) to ensure that the turning plate (5-6) is closed when the materials are initially received, the turning plate (5-6) can be turned over in time when the materials are accumulated to a certain weight, the counterweight block (5-2) can be increased or decreased according to the operation condition so as to ensure that the turning plate (5-6) can effectively separate the space in time and can not cause material flow blockage,

the air locking valve is arranged at the feed inlet of the diversion trench (8), when more granular particles are not needed to be conveyed downwards, the air locking valve is started to seal, so that a sealed space is formed between the feed inlet of the diversion trench (8) and the downstream material receiving groove (9), a negative pressure environment can be formed at the rear section of the diversion trench (8), namely the feed inlet close to the diversion trench (8), and air containing dust is conveniently returned to the rear section of the diversion trench (8) from the downstream material receiving groove (9),

after the flap air locking valve (5) finishes an intermittent unloading period, the flap (5-5) is restored to be closed, and the dustfall air pipe (7) in the area below the flap (5-6) and the fully-sealed guide chute of the downstream material receiving groove (9) form a sealed space; materials enter a downstream receiving groove (9) along the dust falling air pipe (7) and the diversion trench (8), and the rear section area of the diversion trench (8) is vacated due to the original occupied space after the materials flow forwards, so that a negative pressure state is formed locally; the material discharged to the surface of the downstream material receiving groove (9) along the diversion trench (8) is converted from motion to static state to generate raised dust, the part of dust-containing air returns backwards along the dust-removing air pipe (7) under the negative pressure suction effect of the rear section of the diversion trench (8), the speed of the coarse dust particles is attenuated and gradually falls back to the surface of the downstream material receiving groove (9) under the action of self gravity in the rising process, fine dust is treated by the dust hood (7-6) and then adhered to the dust hood (7-6) to be removed through periodic ash removal, the raised dust-containing air is purified through the dual effects of gravity attenuation and filtration, and the purified clean air is filled to the area under the negative pressure suction effect of the rear section area of the diversion trench (8), so that the pressure balance in a closed space formed by the dust-removing air pipe (7) and the downstream material receiving groove is ensured, and no overflow power is generated in the air, and internal circulation self-dust removal is formed.

2. The utility model provides a dust fall chute device, its characterized in that, dust fall chute device include charge-in pipeline and according to claim 1 dust fall tuber pipe device, charge-in pipeline's both ends are from last to being equipped with feed inlet (1-1) and discharge gate (1-5) down in proper order, discharge gate (1-5) with the feed inlet intercommunication of guiding gutter (8).

3. The dust fall chute device as claimed in claim 2, characterized in that the feeding pipe is a spiral pipe (1), the spiral pipe (1) comprises a first flow guide side plate (1-2), an upper cover plate (1-3), a second flow guide side plate (1-6) and a bottom support plate (1-4) which are sequentially surrounded to form a pipe, the first flow guide side plate (1-2) is positioned at one side close to the central axis of the spiral pipe (1), the second flow guide side plate (1-6) is positioned at one side away from the central axis of the spiral pipe (1), the bottom support plate (1-4) and the second flow guide side plate (1-6) are arranged obliquely from top to bottom from the side where the bottom support plate (1-4) and the first flow guide side plate (1-2) are connected, the width of the first flow guide side plate (1-2) in the vertical direction is the same as the width of the second flow guide side plate (1-6), and the height of the upper edge of the first flow guide side plate (1-2) is higher than the height of the second flow guide side plate (1-6).

4. A dust-settling method, characterized in that the dust-settling air pipe device according to claim 1 is applied to recycle and collect the raised dust in a downstream receiving groove (9) to a diversion trench (8).

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