CN213762695U

CN213762695U - High-efficient buggy screening plant

Info

Publication number: CN213762695U
Application number: CN202021554943.6U
Authority: CN
Inventors: 张宏旭
Original assignee: Shaanxi Yulin Energy Group Hengshan Coal Power Co ltd
Current assignee: Shaanxi Yulin Energy Group Hengshan Coal Power Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-07-23
Anticipated expiration: 2030-07-31

Abstract

The utility model discloses a high-efficient buggy screening plant, including screening case, screening case is divided into a plurality of mutually independent screening rooms by the baffle, and screening roof portion is fixed and is provided with interconnect's conveyer belt and adjusting motor, and the fixed scraping wings that are provided with on the conveyer belt, the screening incasement still is fixed and is provided with the screening board, is provided with a plurality of screen cloth with screening room one-to-one on the screening board, along the direction of motion of scraping wings, the mesh number of screen cloth reduces in proper order, still is provided with row material pipe and inlet pipe simultaneously on screening case; the utility model discloses a scraping wings promotes the material to move on the screening board, and the buggy that accords with the regional screen cloth screening specification in place directly enters into the screening case of screen cloth downside, and discharges from the row of material pipe, and the buggy that does not accord with the screening requirement directly enters next level screen cloth and repeats the above-mentioned process until accomplishing the screening, and the last level screening room is used for retrieving the unqualified buggy that granule is bigger; the utility model discloses a continuous screening of buggy has improved screening efficiency greatly.

Description

High-efficient buggy screening plant

Technical Field

The utility model relates to a buggy screening equipment technical field, concretely relates to high-efficient buggy screening plant.

Background

At present, thermal power generation is a main form for acquiring electric energy in China, and in order to improve the combustion efficiency of coal, lump coal is ground and processed into coal powder and then conveyed to corresponding equipment for combustion, but the granularity of the coal cannot be completely the same after grinding, and a large amount of unqualified coal powder enters a boiler for combustion without certain screening operation, so that the combustion efficiency of the equipment is influenced; but the screening equipment efficiency of buggy among the prior art is lower, can not carry out the screening operation of a plurality of specifications buggy simultaneously, and the transportation of material is wasted time and energy.

SUMMERY OF THE UTILITY MODEL

The defect that screening efficiency is low to existence among the prior art, the utility model discloses a high-efficient buggy screening plant adopts the utility model discloses not only realize the continuity of operation of buggy screening, improved the operating efficiency, can realize the screening operation of multiple different specification buggy simultaneously, further guaranteed the efficiency of screening.

A high-efficiency pulverized coal screening device comprises a screening box, wherein a conveyor belt and an adjusting motor which are mutually connected are fixedly arranged at the top of the screening box, and a plurality of material pushing plates are uniformly and fixedly arranged on the surface of the conveyor belt; the screening plate is fixedly arranged in the middle of the screening box, a plurality of screens are sequentially arranged on the screening plate along the movement direction of the material pushing plate, and the mesh number of the screens is sequentially reduced; the lower part of the screening box is divided into a plurality of mutually independent screening chambers by partition plates, and the bottom of each screening chamber is provided with a discharge pipe; the screening case front end still is provided with the inlet pipe.

Preferably, the middle part of the scraping paddle is in an arc shape protruding outwards, and the two ends of the scraping paddle are deflected towards the middle part.

Preferably, the bottom of the scraping paddle is fixedly connected with a scraping plate made of rubber.

Preferably, each screening chamber bottom all is provided with the stock guide that is the square cone shape, arrange the minimum intercommunication of material pipe and stock guide.

Preferably, be provided with a plurality of sealing doors with each screening room intercommunication respectively on the screening case, be provided with joint strip on the sealing door.

Preferably, the screen is made of a stainless steel plate with a flat surface through stamping, and the surface of the screen is sprayed with a wear-resistant coating.

Preferably, a plurality of sieve pores are uniformly arranged on the screen, and the sieve pores are arranged in a conical shape with a small inlet end and a large outlet end.

Preferably, the tail end of the feeding pipe is inserted into the screening box, the tail end of the feeding pipe is arranged in a strip shape, and the outlet of the feeding pipe is also provided with a material equalizing plate.

Preferably, the length of the screen mesh positioned in the middle of the screening plate is the largest, the screen mesh extends to two sides from the middle, and the length of each screen mesh is gradually decreased linearly.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a screening case, the screening incasement is cut apart into a plurality of mutually independent screening rooms by the baffle, simultaneously at screening roof portion still fixed be provided with interconnect's conveyer belt and adjusting motor, the fixed scraping wings that is provided with on the conveyer belt, the screening incasement still fixed be provided with screening board, be provided with a plurality of and screening room one-to-one screen cloth on the screening board, and along the direction of motion of scraping wings, the mesh number of screen cloth reduces in proper order, still is provided with row material pipe and inlet pipe simultaneously on the screening case; the utility model discloses in the use material is sent into the screening case through the inlet pipe, and the scraping wings promotes the material and spreads out and constantly moves forward on the screening board, and the buggy that accords with the regional screen cloth screening specification at this moment directly enters into the screening case of screen cloth downside to discharge from the row of discharge tube finally, and the buggy that does not accord with the screening requirement directly enters next level screen cloth and repeats the above-mentioned process until accomplishing the screening, and the last level screening room is then used for retrieving the great unqualified buggy of granule;

compared with the prior art, the utility model continuously pushes the materials to the screen meshes with different specifications through the circular motion of the material pushing plate, thereby realizing the continuous screening operation of the pulverized coal and greatly improving the screening efficiency; meanwhile, according to the requirement of screening quality, the utility model can realize the screening of 2-4 kinds of coal powder with different specifications, and can realize the screening operation with more specifications by lengthening the length of the equipment; the processing effect of a plurality of devices can be realized through one device, the hardware investment is reduced, meanwhile, the raw materials do not need to be frequently transported, the screening efficiency is greatly improved, and the production cost is reduced.

Meanwhile, the material pushing plates arranged in multiple stages can reduce the total amount of materials needing to be screened at a time on the premise of ensuring that the screening efficiency is not influenced, namely the material pushing plates arranged at intervals give certain material stacking time, and ensure that continuously conveyed materials are divided into a plurality of batches for screening operation, so that the organic combination of intermittent material pushing and continuous material feeding is realized, and the working efficiency of the equipment is improved; the batch screening operation of the same time can reduce the amount of single screening materials, avoids the materials to be stacked, ensures that the materials as much as possible are screened in the correct region, improves the screening quality, can flexibly adjust the amount of the materials screened by the single screening by controlling the distance between the two material pushing plates, and is more flexible and diversified in use.

2. The middle part of the material pushing plate of the utility model is an arc-shaped arrangement which protrudes outwards, and the two ends of the material scraping paddle are arranged in a deflection arc shape towards the middle part, so that the material in a centralized area can be guided to two sides, thereby ensuring that the material is uniformly distributed on the whole screen, avoiding that the material can not fall off from the screen in time due to too concentrated material, and improving the screening quality; meanwhile, the parts deflected towards the middle part in the two sides can guide back the materials positioned at the edges, so that the materials are prevented from being gathered towards the two sides of the screening plate, and the screening efficiency is improved.

3. The bottom of the scraping paddle of the utility model is provided with a scraping plate made of rubber, the top of the scraping paddle is provided with a feeding plate in a sawtooth shape, the material plate is directly contacted with the screening plate and the screen, and the abrasion of the equipment can be obviously reduced by adopting the rubber manufacture, so that the service life of the equipment is prolonged; meanwhile, the materials are scattered through the material loosening plate, so that the materials can be more quickly and uniformly distributed in the whole material scraping and screening area.

4. The utility model discloses a set up in the stock guide of screening room bottom with the material in time the direction arrange the material pipe, avoid the material to pile up, influence normal, the continuity of operation of equipment, improve ejection of compact efficiency simultaneously.

5. The utility model discloses a screening case is last to be provided with a plurality of sealing doors, makes things convenient for the staff to overhaul equipment and cleaning operation through the sealing door, reduces the maintenance degree of difficulty of equipment, improves the sealing performance of sealing door through joint strip simultaneously, and then avoids the buggy to spill over from the sealing door, influences operational environment.

6. The screen mesh of the utility model is made of stainless steel plates with smooth surfaces by stamping, the higher flatness of the screen mesh can be effectively reduced, and meanwhile, the structural strength of the screen mesh is higher, so that a large amount of eyebrow powder can be simultaneously borne, and the screening efficiency of the device is improved; meanwhile, the wear-resistant coating sprayed on the surface of the screen improves the wear resistance of the screen and prolongs the service life of equipment.

7. The sieve mesh of the utility model is designed with small inlet end and large outlet end, and the design can ensure the discharge efficiency of the material as soon as possible without influencing the screening effect, avoid the accumulation of the material at the sieve mesh, block the sieve mesh, further influence the discharge of the material, and ensure the normal work of the screen mesh;

8. the utility model discloses an inlet pipe tail end is the rectangular shape setting of slope to insert the screening incasement, its exit end still is provided with equal flitch simultaneously, can effectively guarantee through the aforesaid setting that the material is even as far as put into on whole screen cloth, avoid the material too concentrated, and then guarantee that the material can be timely drop to the screening indoor through the sieve mesh, thereby improve the screening quality.

9. The utility model discloses the screen cloth that is located the middle part is the longest, the screen cloth length of its both sides is linear reduction, long-term engineering practice shows, the particle size distribution of buggy is approximate normal distribution, this kind of setting of screen cloth is the same with the distribution of buggy, under the certain condition of scraping wings velocity of motion, can guarantee that granule concentrated region's buggy has sufficient screening time, even the distribution volume of each different granularity interval of buggy is directly proportional with screening time, and thereby make the buggy can drop to corresponding screening chamber as far as, avoid the buggy of different specification granularities to mix, improve screening quality; above-mentioned structural design is through the ingenious improvement screening quality of the space make full use of to screening incasement portion, and equipment structure obtains simplifying, and work is more reliable and more stable.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

fig. 3 is a schematic view of the internal structure of embodiment 2 of the present invention;

fig. 4 is a schematic view of the structure of the feeding pipe of the present invention;

FIG. 5 is a schematic view of the structure of the screen of the present invention;

fig. 6 is a schematic diagram of the structure of the sieving plate of the present invention;

reference numerals: 1. screening case, 2, conveyer belt, 3, adjusting motor, 4, scraping plate, 5, screening board, 6, screen cloth, 7, division board, 8, screening room, 9, row's material pipe, 10, inlet pipe, 11, scraping plate, 12, stock guide, 13, sealing door, 14, joint strip, 15, wear-resistant coating, 16, sieve mesh, 17, homocline board.

Detailed Description

The present invention will be further explained by the following embodiments:

embodiment mode 1

The embodiment is taken as the basic embodiment of the utility model, and discloses a high-efficiency pulverized coal screening device, the specific structure is shown in fig. 1 and fig. 2, the device comprises a screening box 1, the top of the screening box 1 is of an open structure, a conveyor belt 2 is arranged at the upper part of the screening box, a plurality of material pushing plates 4 are uniformly and fixedly arranged on the conveyor belt 2, meanwhile, the conveyor belt 2 is in power connection with an adjusting motor 3 positioned in the screening box 1 through belt pulleys, the middle parts of the material pushing plates 4 are in an arc arrangement protruding outwards, and the two sides of the material pushing plates are deflected inwards, so that the material pushing plates 4 are in a W-shaped arrangement as a whole;

a screening plate 5 is fixedly arranged in the middle of the screening box 1, a plurality of screens 6 are fixedly arranged on the screening plate 5, and the screening meshes of the screens 6 are sequentially reduced along the movement direction of the material pushing plate 4; the screen 6 is formed by stamping a stainless steel plate with a smooth surface, and meanwhile, in order to improve the wear-resisting property of the screen 6, a wear-resisting coating 15 is sprayed on the surface layer of the screen 6; the sieve pores 16 on the sieve 6 are arranged in a conical shape with a small inlet end and a large outlet end.

Meanwhile, the lower part of the screening box 1 is divided into a plurality of mutually independent screening chambers 8 through partition plates 7, each screening chamber 7 is arranged in one-to-one correspondence with the screen 6, the bottom of each screening chamber 8 is provided with a material guide plate 12, the material guide plates are arranged in a square conical shape, and the bottom of each material guide plate 12 is provided with a discharge pipe 9; meanwhile, a feeding pipe 10 is fixedly arranged on the screening box 1, and the outlet end of the feeding pipe 10 is positioned between the screening plate 5 and the conveyor belt 2, so that the materials are accurately conveyed to the screening plate 5;

the screening box 1 is further hinged with a plurality of sealing doors 13, the sealing doors 13 are communicated with the screening chambers 8 in a one-to-one correspondence mode, and meanwhile sealing rubber strips 14 are further arranged on the sealing doors 13.

Embodiment mode 2

As a preferred embodiment of the present invention, the present invention discloses a high-efficiency pulverized coal screening device, the specific structure of which is shown in fig. 3, and the device comprises a screening box 1, the top of the screening box 1 is an open structure, the upper part of the screening box is provided with a conveyor belt 2, a plurality of material pushing plates 4 are uniformly and fixedly arranged on the conveyor belt 2, meanwhile, the conveyor belt 2 is in power connection with an adjusting motor 3 located in the screening box 1 through a belt pulley, the material pushing plates 4 are arranged in a W shape, and the free ends of the material pushing plates are fixedly connected with a material scraping plate 11 made of rubber;

meanwhile, the lower part of the screening box 1 is divided into a plurality of screening chambers 8 through a plurality of partition plates 7, each screening chamber 8 corresponds to the screen 6 one by one, and according to the particle distribution range of the coal, the lengths of the screen 6 are unequal, namely, the particle size distribution of the coal powder is approximately in normal distribution, so that the length of the screen 6 positioned in the middle is the largest, the lengths of the screen 6 positioned at two sides of the screen 6 in the middle are linearly decreased, the specific length of the screen is determined according to the comprehensive consideration of the distribution condition of the particle sizes of the coal powder with different specifications, the screening quality requirement and other factors, and meanwhile, the length of the screening chamber 8 is matched with the length of the corresponding screen 6;

the bottom of screening room 8 is connected with row's material pipe 9 through the stock guide 12 of slope setting, still fixedly is provided with inlet pipe 10 simultaneously at the front end of screening case 1, in the screening case 1 was inserted to the one end of inlet pipe 10, the exit end of inlet pipe 10 was rectangular shape setting, still fixedly is provided with homocline 17 in it.

The utility model discloses during the use, convey the buggy through the inlet pipe on the screening board, drive the conveyer belt motion through adjusting the motor simultaneously, and then promote accumulational buggy through the scraping wings to the screen cloth motion, the buggy is in the motion process, the buggy that accords with current screen cloth screening specification sees through the screen cloth and enters into the screening room, and finally discharges from corresponding row's material pipe, and the buggy that does not accord with is then promoted next grade screen cloth and is repeated above-mentioned process, and the buggy that does not accord with screening requirement completely is then direct to discharge from last grade screening case and row's material pipe and return the mill coal and be happy to grind qualified buggy again;

compared with the prior art, the utility model realizes the continuous feeding and screening operation of the coal powder, greatly improves the screening efficiency, simultaneously realizes the screening operation of a plurality of coal powders with different specifications by the multi-stage screening structure, is beneficial to reducing the investment of hardware equipment, avoids the frequent transportation of the materials and improves the working efficiency;

simultaneously the utility model discloses a reasonable structure setting sieves a large amount of buggy branch batch, reduces single batch sieve weight to improve the screening quality.

Claims

1. The utility model provides a high-efficient buggy screening plant, includes screening case (1), its characterized in that: the top of the screening box (1) is fixedly provided with a conveyor belt (2) and an adjusting motor (3) which are connected with each other, and the surface of the conveyor belt (2) is uniformly and fixedly provided with a plurality of material pushing plates (4); a screening plate (5) is fixedly arranged in the middle of the screening box (1), a plurality of screens (6) are sequentially arranged on the screening plate (5) along the movement direction of the material pushing plate (4), and the meshes of the screens (6) are sequentially reduced; the lower part of the screening box (1) is divided into a plurality of mutually independent screening chambers (8) by partition plates (7), and the bottom of each screening chamber (8) is provided with a discharge pipe (9); the front end of the screening box (1) is also provided with a feeding pipe (10).

2. The high-efficiency pulverized coal screening device as claimed in claim 1, wherein: the middle part of the material pushing plate (4) is in an arc shape protruding outwards, and two ends of the material pushing plate (4) are deflected towards the middle part.

3. The high-efficiency pulverized coal screening device as claimed in claim 1, wherein: the bottom of the material pushing plate (4) is fixedly connected with a material scraping plate (11) made of rubber.

4. The high-efficiency pulverized coal screening device as claimed in claim 1, wherein: each screening chamber (8) bottom all is provided with stock guide (12) that are the square cone shape, arrange material pipe (9) and the least significant end intercommunication of stock guide (12).

5. The high-efficiency pulverized coal screening device as claimed in claim 1, wherein: the screening box (1) is provided with a plurality of sealing doors (13) which are respectively communicated with the screening chambers (8), and the sealing doors (13) are provided with sealing rubber strips (14).

6. The high-efficiency pulverized coal screening device as claimed in claim 1, wherein: the screen (6) is made of a stainless steel plate with a smooth surface through stamping, and the surface of the screen is sprayed with a wear-resistant coating (15).

7. The high-efficiency pulverized coal screening device as claimed in claim 1, wherein: a plurality of sieve pores (16) are uniformly arranged on the screen (6), and the sieve pores (16) are arranged in a conical shape with a small inlet end and a large outlet end.

8. The high-efficiency pulverized coal screening device as claimed in claim 1, wherein: the tail end of the feeding pipe (10) is inserted into the screening box (1), the tail end of the feeding pipe is arranged in a strip shape, and an equalizing plate (17) is further arranged at the outlet of the feeding pipe.

9. The high-efficiency pulverized coal screening device as claimed in claim 1, wherein: the length of the screen (6) in the middle of the screening plate (5) is the largest, the screen (6) in the middle extends to two sides, and the length of each screen (6) is gradually decreased linearly in sequence.